Basic knowledge of lead-acid batteries
1. What is discharge efficiency?
Discharge efficiency under certain discharge conditions discharge voltage emitted to the end than the actual capacity and the nominal capacity, mainly by the discharge rate, temperature, resistance until factors, in general, the higher the discharge rate, the discharge the lower the efficiency. The lower the temperature, the lower the discharge efficiency.
2. What is the battery discharge rate?
Refers to discharge, the discharge current (A) Rated capacity (A • h) represents the relationship between magnification.
3. What is the hour rate discharge of the battery?
After a certain number of hours to put the output current required for the rated capacity, called the discharge rate.
4, what is the energy density of the battery?
Electrical energy per unit volume contained in the battery.
5, lead-acid batteries using what criteria?
Battery Standard sub national standards, industry standards, corporate standards at three levels. Car battery currently performing a number JB / T 10262--2001 industry standards.
6, lead-acid battery electric vehicles is how named?
Automotive lead-acid batteries name is called 6-DZM-X, where X is the suffix, X may be 8,10,12, on behalf of the battery capacity. 6DZM representatives of six groups combined into a single-cell battery voltage of 12V electric vehicle battery maintenance-free valve-regulated, if the gel batteries, their marking method 6-DJM-X.
7, lead-acid battery capacity labeling method?
C2 should prevail, that is 0.5C2 current discharge, when the battery voltage reaches the discharge termination voltage discharge time and the current time of the product shall be equal to or close to the nominal capacity. For example: a 12V, 12Ah batteries to 5A current discharge, the discharge is terminated when the voltage reaches 10.5V, time can not be less than 140min; Similarly, a 12V, 10Ah batteries to 5A current discharge to the termination voltage 10.5V voltage is reached, time can not be less than 120min. The error is 0.1Ah
In fact industry standards: 10Ah battery to 5A current discharge termination voltage to time shall not be less than 120min. Enterprise products actually achieved is 130 ~ 137min.
8. What is the capacity of the battery overcharge?
Industry standard, lead-acid battery charging at 1.2A continuous 48h, the actual capacity of not less than 95% of the rated capacity.
9. What is the over-discharge capacity of the battery?
Industry standard, lead-acid battery begins to discharge current of 12A ± 1.2A, in order to set the impedance of a continuous discharge 2.0h, the actual capacity of not less than 75%
10, what is characteristic of cell cryopreservation?
Industry standard, lead-acid battery storage 10h at ambient conditions -10 ℃ ± 0.1 ℃, the actual capacity of not less than 70%.
11, how to evaluate the lead-acid battery life?
With a capacity of 75% depth of discharge, life should not be less than 350 times.
12, lead-acid batteries have those advantages and disadvantages?
(1) Advantages - Low price: the price of lead-acid batteries for the rest of the price of the battery type 1/4 to 1/6. A relatively low investment, most users can afford.
(2) drawback - the weight of large, bulky, low-energy mass ratio, squeamish, charging and discharging demanding.
13. Why does the battery to be stored for some time before packaging and shipping?
Storage battery performance is an important parameter to measure the overall performance of the stability of the battery. After a certain time after the storage battery, the battery capacity and allowing a certain degree of resistance variation. After a period of storage, you can let the electrochemical properties of the components inside stabilized, we can understand the size of the self-discharge characteristics of the battery, in order to ensure the quality of the battery.
14. What is the load capacity of the battery?
When the battery's positive and negative when used on appliances, driven by the output power when electrical work, that is connected to both ends of the load capacity of the battery.
15, currently in use and research of "green battery" What?
New green battery means in recent years has been in use or are being developed for a class of high-performance, non-polluting batteries. Currently lithium-ion battery has been widely used, nickel metal hydride batteries and mercury-free alkaline manganese batteries and are promoting the use of lithium or lithium-ion batteries being developed plastics, combustion cells, electrochemical energy storage supercapacitor are all new green battery category. In addition, the current use of solar energy has been widely used for solar cells photoelectrically converted.
16, the discharge rate and the use of lead-acid batteries What is the relationship?
The same power of the motor, the rated voltage is different, absolutely different power consumption rate. For example: with a 180W motor, rated voltage of 24V, current of 7.5A; and a rated voltage of 36V, the current is only 5A, they use the same capacity battery pack combination of 36V, with 5A current discharge, electro-chemical reaction is slow and the combination of 24V, 7.5A current to discharge, electro-chemical reaction will be relatively intense, it is better to discharge 5A calm.
Batteries discharge current 0.5C below is the economy. What is 0.5C? C: represents the battery capacity, C2 represents the actual discharge capacity when the discharge rate of the battery measured results of 2 hours. That is, when calibrated to C2 capacity, should be released half an hour capacity (0.5C2) is consistent with the provisions of capacity, if more than 0.5C2, its capacity will be discounted. And the battery life adversely.
Now, 2 hour discharge rate marked a capacity of 12Ah battery should be marked as C2 = 12Ah, so 0.5C2 = 0.5 × 12 = 6A. So, 12Ah battery with 0.5C discharge current is 6A. 10Ah battery, 0.5A.
Long battery work, work output current is less than the rated capacity of the battery is indeed Cx / X, X is a ratio of the battery rated at, which is the principle of choice. X is 2, then the rate of discharge should be two hours; X value is 3, the time three hours should be considered.
17, the current capacity of lead-acid batteries that several labeling schemes?
The current capacity of lead-acid batteries have the following marking methods such as C20, C10, C5, C2, respectively, to 20h, 10h, discharge rate 5h, 2h and the actual capacity of the discharge is to. If the capacity is 20h discharge rate is used, it should be labeled C20, C20 = 10Ah battery, which refers to the current C20 / 20 discharge capacity values obtained 20h. Conversion to C5, C20 that is 4 times the specified current discharge capacity 7Ah only about the electric bike with usually within 1 ~ 2h large current discharge, lead-acid batteries discharge completely in 1 ~ 2h (C1 ~ C2) within , close to a target current 10 times, then it is actually capable of supplying electrical energy only C20 50% ~ 54% of the discharge capacity. Battery capacity marked as C2, that is 2h discharge rate of the capacity indicated, if not C2, it should be calculated the correct discharge time and capacity. In 5h discharge rate (C5) marked capacity is 100%, then when finished to put in 3h, the actual capacity is only 88%; discharged within 2h, only 78%; discharged within 1h, 5h on the left in order to discharge 65% of the time capacity. Marked capacity is assumed to be 10Ah. So now only get to 3h actual discharge capacity of 8.8Ah; if to 1h discharge, you only get 6.5Ah power, arbitrarily reduced discharge rate, discharge current> 0.5C2 capacity than marked reduction not only of battery life also it has some influence. Similarly, for marking (nominal) capacity C3 battery discharge current C3 / 3, i.e. ≈0.333C3, if C5, the discharge current should 0.2C5, and so on.
18, the secondary battery What are the common characteristics?
The common feature of the secondary battery charging anode gas is generated, surround the negative electrode, a negative electrode so that electrons can not reach the electrical reaction, not only affect the charging efficiency, but also causing plate heat, dry electrolyte evaporation, concentration changes. Lead-acid battery electrolyte evaporation of water thickened, will promote the curing plate, the charging efficiency is reduced, decreased capacity, and finally causing the battery scrap
All batteries should not over-discharge, over-discharge is reduced at the expense of short-lived, not lower than the discharge termination voltage discharge shall prevail.
19. Why do a full discharge of the battery every month?
If the long-term lead-acid batteries are not fully discharged state, then a month should give it a chance to completely discharge to maintain the battery plate active material. Fully discharged until the controller can run long distances undervoltage protection, automatic cut-off date.
20, the battery negative factors are those?
Many battery negative factors, mainly in the charge and discharge phases.
(1) "super two" discharge stage is the discharge current value, i.e., long-term value of the discharge current exceeds the allowable; second problem is that the discharge over-discharge, i.e., more than the allowable amount of discharge cell, is called "super-two", the battery life is very harmful.
(2) "over two", "two less" charge phase there are "two off", "two less."
. A "two over": a transient is over charge; over a lead-acid batteries to store not too long, and occasional supplementary energy.
. B "two less": less is a lead-acid battery charge less, cells are often sufficient dissatisfaction, lack of timely reduction after plate curing, lead-acid batteries is extremely taboo; and once inside each single cell battery of the battery pack Room owe balanced, resulting in a discharge gap between the extent and the charge level of the battery block each single set of batteries widening, less filling more and more under-filling, put more and more over-discharge. Affect the life of the entire battery pack, but also to their economic costs increase.
"Over two" and "two less" is the enemy of the battery, can not be underestimated. But "over two" and "two less" is caused by the people themselves, the problem is more complex, there are many reasons, from the selection of maintenance, use, timely and charger controller supporting reasonable, battery cause of failure detection, they are interrelated.
The following is quoted fragment:
Lead-acid batteries Safety Instructions (1)
A routine inspection
1, the liquid level
Drops below the nominal level, will shorten battery life, but will result in too little liquid electrolyte battery heat damage, therefore, we must always pay attention to the adequacy of the electrolytic solution.
2, terminal, wire, cover
Must always check the battery terminal junction, and junction wire due to corrosion caused by oxidation, and check whether the deformation of the lid, if there is fever phenomenon.
3, Appearance
Dirty surface will cause the battery drain, so that the battery surface should be clean at all times, and dried.
Second, maintenance
1, water
Add distilled water according to a predetermined level, do not add water to prolong the interval of distilled water and add too much, too much water electrolyte overflow, causing leakage.
2, charging
The process of charging the battery will produce gas, the charge should be kept well ventilated place, no fire around while charging oxygen, acid gases generated in the process will have an impact around.
During charging unplug the charger plug arcing, charging machine will shut down, unplug it before.
After charging the battery stranded around a lot of hydrogen, it does not allow any open flame, open the cover on the battery should be charged.
3, terminal, wire, cover maintenance
Must be specified by the manufacturer of professional and technical personnel can be carried out.
4 Clean
If dirty, you can clean it with a damp cloth, if very dirty, it is necessary to remove the battery from the car after washing with water to make it dry naturally.
Production design: all-electric forklift trucks, semi-electric forklift trucks, electric pallet trucks, electric tractors and other machinery and logistics.
21, the battery will overheat Why?
If the battery is overheating because the discharge current is caused by too much, there are several possible reasons: a, overload, long high-load operation; b, the body itself as resistance axle problem, bearing problems, and the wheels and the brake problem frame friction; c, the slope is too steep; d, the battery capacity is too small; e, motor problems; f, transmission line problem. One of the reasons is the battery capacity is too small battery overheating, should increase the capacity and reduce operating current.
22, the battery heat what harm?
Car battery, whether in use or in charge, allowing a small fever, but not abnormal heating. Abnormal heat obvious, stroking the battery case that can obviously feel. Heat very harmful to the battery. First heat causes evaporation of water and electrolyte gradually dried up, and then charging efficiency decreases, plate deformation, the resistance increases, mechanical components accelerate oxidation, burn plates or spacers, and finally manifested in reduced battery capacity, shortened life expectancy.
23, battery discharge fever causes are those?
(1) discharge fever causes: excessive discharge, there may be a small battery capacity, discharge current for a long time more than 0.5C. Here emphasis: after short trips, although the battery consumption of a certain amount of power, but later still, there is a battery recovery process, the plate electrochemical process still continues, the voltage will be picked up, but that does not mean recovery capacity; in contrast, long-distance driving on the road without stopping, plate electrochemical action and energy consumption at the same time, it appears there will be three situations:
① When the motor rated voltage value is low, the battery capacity is small, the operating current is too large, the voltage will be drastically reduced, capacity is also quickly exhausted, the battery the most disadvantaged.
② battery electrochemical reaction rate can be maintained only driving, no cell recovery and respite, often do the whole charge-discharge cycles, little attention will exceed consumption. Encountered wind uphill, power consumption is very large, forcing the battery plate sharp reaction, the higher the heat of the battery case, the battery will be damaged, shortened life span, indicating that no surplus capacity.
③ ideal cell is an electrochemical reaction rate can comfortably supply enough power. No unusual heat the battery case, the battery capacity is surplus.
The last three cases only do long-distance traffic is ideal. It should be noted that the battery case significant fever, internal heat of the battery itself even higher.
24, battery charging fever causes are those?
The battery during the charging process, part of the electrical energy into chemical energy, but also use some energy into heat energy and other. Rechargeable Battery heat is normal, but at higher temperatures it should be checked whether the charge current is too large or the battery internal short circuit occurs, heat a small amount of electrolyte and the relationship, less in the case sealed battery electrolyte resistance increases when the amount of large, will cause the battery temperature and charging terminal voltage is high. Battery aging, dry electrolyte, internal short circuit also cause fever. Charger can not charge late in constant, as well as causing the battery voltage exceeds the allowable value, the temperature will rise, serious bulging, end of life.
In use, try not placed horizontally or upside down, the battery inside one o'clock to prevent a large number of gas production can not be smoothly discharged from the discharge valve, in particular, especially when charging, it may cause the housing to burst.
25, joined the new lead-acid battery electrolyte temperature rise is what is the reason?
After the new battery electrolyte added, the temperature rise and internal factors related to the new battery. After the dry-charged battery fluid temperature rise increases the battery temperature is not very clear, this is because dry charged plates after antioxidant treatment, the factory battery is fully charged state, you can use the load after dosing; ordinary plate battery, without the antioxidant treatment, negative plates in a semi-fully charged state, a considerable portion of the material is lead oxide and sulfuric acid reaction to produce a lot of heat, so long high temperature. Sometimes the summer temperature reaches above 50 ℃, the charge should pay attention to artificial cooling.
26, how to maintain the consistency of the battery pack?
Although it has been tightly controlled selection, but after a certain period of use, non-uniformity occurs when the lead-acid battery factory and gradually become larger, the charger and do not have the option of recognition can not be added to charge less, and the over charge limited amount charged, how to balance the battery capacity to give to the people. Users battery pack late, regular and irregular measure the open circuit voltage of each battery. Low voltage, single supplement charge to voltage and capacity consistent with other battery, try to keep the gap between them is reduced.
27, the battery can fill with distilled water
Maintenance free valve regulated lead-acid batteries and other batteries is different, in fact it can not be completely maintenance free, only less maintenance, less electrolyte evaporation, no leakage. Since the charger has not reached the desired level entirely, still can not avoid a small amount of water evaporation. For some users know a little knowledge of the battery, and the capacity decreased, can consider themselves suitably add water to restore the original concentration of the electrolyte or lower than the original suitable concentration, more favorable to the plate.
28, often pure drinking water is available for battery use?
Can not be applied, because everyday people are drinking pure water impurities is much higher than the battery water requirements, but some elements beneficial to human body water and less sediment bacteria. Battery water should reach JB / T10053-1999 standards.
29. What is the main component of electrolyte lead-acid batteries?
It is a mixture of sulfuric acid and distilled water (or deionized water).
30, common battery slot (shell) have those kinds?
Common battery slot with hard rubber and polypropylene cars, motorcycles, traction battery slot, ABS sealed battery slot made of polystyrene and a small amount of the battery compartment.
31, those common battery separator?
Common battery separator rubber separator, PP separator, PE separator, PVC and AGM separator the separator.
32, lead-acid batteries commonly used in the manufacture of alloys are those?
Alloy used in the manufacture of lead-acid batteries are mainly lead-antimony alloy, lead low antimony alloy, lead antimony and cadmium alloy lead-calcium alloy.
33, lead-acid battery charging method?
There are constant current charging, constant voltage charging, constant pressure limiting charge, equalizing charge, floating charge and the pulse fast charging.
34, lead-acid battery electrolyte density and open circuit voltage have anything to do?
Open circuit voltage = 0.85 electrolyte density (empirical formula)
35. What is the lead-acid battery capacity depends on the plate?
It depends on the amount of positive and negative plate active material.
36, the lead-acid battery positive and negative plates of the main component of what?
Positive plate active material of lead dioxide is the main component, the main component of the negative plate active material is sponge lead.
37. Why pungent odor lead-acid battery charging?
The battery during charging, mixing sulfuric acid vapor, water vapor, hydrogen and oxygen and other substances inside the battery to escape into the air, it will give the impression Road pungent odor.
38. What is the lead-acid battery float charging, equalizing charge?
Floating charge: When the normal power supply is interrupted to the circuitry of the battery. Its terminals are always connected to the constant voltage power supply to maintain the battery is nearly fully charged state.
Equalizing charge: To ensure that all batteries fully charged single battery charge a continuation.
39, after adding a new lead-acid battery electrolyte temperature rise is what is the reason?
After the new battery electrolyte added, the temperature rise and internal factors related to the new battery. After the dry-charged battery fluid temperature rise increases the battery temperature is not very clear, this is because dry charged plates after antioxidant treatment, the factory battery is fully charged state, you can use the load after dosing; ordinary plate battery, without the antioxidant treatment, negative plates in a semi-fully charged state, a considerable portion of the material is lead oxide and sulfuric acid reaction to produce a lot of heat, so long high temperature. Sometimes the summer temperature reaches above 50 ℃, the charge should pay attention to artificial cooling.
40, raw plates sulfated What are the reasons?
Sulfated plates produced for the following reasons:
First 1) battery charge is low or interrupt the initial charging time is longer;
2) long battery charging less;
3) failure to timely charge after discharge;
4) frequently overcharge or deep discharge current is small;
5) electrolyte density is too high or the temperature is too high, lead sulfate formation depth difficult to restore;
6) battery holds a longer time, long-term use without periodic charging;
7) electrolyte impurities, large self-discharge;
8) local effects of an internal short circuit or multi-cell surface water caused by leakage;
9) inside the battery electrolyte level is low, so that the exposed part of the plate sulfation.
The following is quoted fragment:
Lead-acid batteries Safety Instructions (2)
Third, custody
1, a storage area
You can not make a short circuit;
May cause a short circuit due to the rain of fire, and may produce a small amount of hydrogen gas, the battery must be stored in ventilated, cool place.
2, waste battery
Waste battery power is still there, it should be kept in accordance with the battery storage method used.
Fourth, the operation of the electrolyte
1, check the specific gravity
Use of inhaled hydrometer to check the specific gravity, do not let the electrolyte spill out of the job, and to wear protective equipment.
2, in addition to checking the operation
Professional advice should, in particular, added electrolyte (sulfuric acid) when.
3, electrolyte leakage
Because the battery tipping, breakage cause electrolyte leakage, emergency treatment should be carried out immediately (refer emergency matters)
Production design: all-electric forklift trucks, semi-electric forklift trucks, electric pallet trucks, electric tractors and other machinery and logistics.
41. What are the requirements for battery storage?
Requires a well-ventilated, dry (preferably mounted air conditioning), keep the ambient temperature around 25 ℃; stronger ground bearing capacity; stored for 3 months for a supplementary charge.
42, battery leakage reason of what and how to solve?
the reason:
a) sealant for sealing cracks caused by the aging;
b) severe overcharge the battery, mix different types of batteries, poor battery gas recombination efficiency;
c) when the acid spilled acid irrigation, resulting in false leakage.
Solution:
1) may be false wipe the battery leakage, left latter observation;
2) Replace the battery leakage.
43. The lack of capacity of the battery capacity detection when found should be how to deal with?
1) respond to the entire set of batteries are done charging process, that are full 13-15 hours.
2) or with a single machine to the battery charge and charge it separately.
44 charge and discharge characteristics, battery
Different types of cells, each with its own charge and discharge characteristics, but no matter what the battery should conform to the following rules:
1. Charge - charging voltage increases with increasing time. When you reach a certain value, it is no longer growing, and the current decreases with time; when it reaches a minimum, and no longer reduces the battery power is increased to obtain.
2. Discharge - Discharge to remember sometime later, with time, the voltage is gradually decreased, remaining capacity also decreased.
3. Other common that at discharge current rate is high, relatively speaking, than the discharging current, the same kind of low battery condition at a rate obtained capacity is smaller.
45, gel lead-acid batteries and vehicles What is the difference with the points lead-acid batteries?
Colloidal lead-acid batteries and sealed lead-acid car batteries are different points: inner gel battery plates and separators, colloidal electrolyte filled more closely, the monomers in the battery compartment is almost no empty space; in addition there is an optimal gel batteries work point, single-cell gel battery charge termination voltage limits between 2.32 ~ 2.35V, charge and discharge acceptance, life, help electrolyte deep discharge capacity can play, charge termination voltage exceeds this value is prone to bulging gel battery case, even rupture. Gel battery case of flooded batteries, heat capacity, heat dissipation, and generally does not appear thermal runaway phenomenon, but if the charge voltage exceeds 2.4V, the voltage reaches a critical, sharp and swift decomposition, rapid warming the battery, the electrolyte additive material sharply expansion is caused by the expansion and then the battery case rupture. The higher the voltage, the role increasingly rapidly accelerate the dehydration, expansion, damage. Gel battery charging less easy in the winter, in summer and easy to damage the battery and reduce battery life.
46, often say that the electric bicycle battery 24V, 36V, 48V What does it mean?
Electric bicycle battery rated voltage of a single 12V, 24V battery pack is set by two 12V batteries in series together, 36V battery, compared with three in series, 48V battery pack four series.
47, what is the electric bicycle "four pieces"?
Electric bicycle motors, batteries, controller and charger for electric bicycles referred to as "four pieces."
48, the electric motor bike there?
Electric Bicycle Motor brush and brushless two kinds of points
49, the electric bicycle motor power What do we have?
Electric Bicycle Motor power rating mostly between 150-180W, and commonly used power is often about 100W, maximum power can reach 250-350W, individual motor can reach 400W or more. According to relevant regulations, the amount of electric bicycle drive motor power, continuous output power should not exceed 240W.
50, what is the optimum operating point of the motor?
Motor has an optimum operating point, at this operating point, the actual efficiency of the motor about nearly 60-70% of rated power, at a time close to 60-70% of the current rating, if the motor power is 180W, then 36V motor rated current is 5A, 24V motor rated current is 7.5A.
Motor is operating in 3A, efficiency above 80%, torque 3.9N.m.
Motor operates at 4A, efficiency of more than 78%, torque 5.2N.m.
Motor is operating in 5A, more than 75% efficiency, torque 6.6N.m.
If the current is increased further, then the rotational speed is reduced, the efficiency is further reduced. Moderate speed, maximum efficiency, less power can travel the greatest distance.
51, the impact of battery electric bicycle motor performance in those areas?
Motor operating current increases, its efficiency is also lower, 24V battery current is greater than 36V battery discharge rate fast. Motor operating current is larger, the discharge rate is the sooner, the battery life is more unfavorable.
52, the controller's role in the electric bicycle?
The controller in the electric bicycle is the motor for the service. Motor starting, running, acceleration, deceleration, stop and other working conditions, are controlled by the controller, there is no controller, motor operation can not control, I want to go could not walk, to not go, or walk up and speed can not be controlled .
The main function of the controller for the following aspects:
(1) electric bicycle operation, the control operation of the motor speed;
(2) protection of the motor being accidentally damaged by a large current.
(3) protect the battery is not over discharge damage.
(4) driving the display panel in the display instrument timely and correct motor show, the instantaneous state of the battery.
(5) The controller can operate with electric motors, power operation of both.
(6) controls the battery discharge protection voltage. 36 V battery discharge protection voltage is 31.5 or 42V (48V battery).
(7) controls the motor over-current protection. 12A (36V) or 15A (24V).
53, the impact on the quality of the controller battery?
The controller can not control the discharge of poor quality, lack voltage protection often cause the battery over-discharge, lead-acid battery plates active material over fluidized. Good quality control, to limit the current when starting the motor, battery undervoltage protective effect, thus extending battery life.
54 What is the role of the charger?
Charger for electric bicycle battery service, and its role is to supplement the battery power required.
55. What are the requirements for electric bicycle charger?
(1) charging head for 15 minutes, have a high current fast charge function, must be added to more than 80% of total capacity.
(2) charger must switch circuit.
(3) is charged to the final stage, automatically transferred to the thin trickle.
(4) to reach the final charge voltage, the charger voltage must be fixed at the termination voltage line, must not exceed.
(5) In determining is full, the auto power off, stop charging.
(6) should have temperature compensation function, when the temperature reached the line, automatically turn off the output circuit, automatic recovery after charging temperature.
56, what is the three-stage charging?
Lead-acid battery charging method should be divided into three stages, namely: constant current charge - constant voltage charging - Trickle charging.
Constant current charging stage: 1.7A current, charge to 13.4V off.
Constant voltage charging phase: 14.7V (single cell), charging time 3h, off current 0.35A
Trickle charging phase: 13.9V (single cell), when the charging current is less than 100mA, deemed sufficient.
57, three-stage lead-acid battery charging method Why?
Start charging the battery receiving ability, can take advantage of this feature, the high current charging, the battery will soon be enough power to save time and energy when filled to a certain extent, in order to prevent the voltage exceeding the limit should be automatically transferred and defined on a constant value, limiting the voltage continues to rise, preventing a final charge voltage exceeds the battery plate damage. But after this charge before, due to the unevenness of battery plate material, there are still not fully restore the portion of the material, these substances if long-term state of cure, it may become permanent and can no longer lead sulfate reduction, the battery capacity it will damage decreased. Therefore, the charging of fine finally trickle charge, make a small part hidden deep within the sulfide try to restore the so charging plates within the cell reaches a level inside and outside the uniform up and down, the number of blocks of the battery plates can try to become uniform.
58, the charger is not constant what happens?
If the charger is not constant, the battery is not being worn, it is a bad charge, because it can not be absolutely constant, the final stage of charging, the charge end voltage, exceeds a predetermined voltage plate material overheating deformation and expansion, and then fall off, the electrolyte is decomposed and water evaporation, concentration is increased further and excessive corrosion of the plate, curing worse. Individual charger failure, because it is not constant, the charge to the final, 36V battery voltage exceeds 45V, even up to 50V. As a rule, rechargeable 36V battery termination voltage of 41.4V, the maximum can not exceed 43.2V, namely, single-cell battery voltage can not exceed 2.4V. There are, in use, the charger may lose voltage function, so that the charging voltage increases, the battery life is very negative.
59, why the charge is not displayed correctly?
After the battery is fully charged, the charger should have displayed, usually red to green, some green to yellow, the battery is substantially fully charged. If the battery is charging does not light or the arc tube has been filled and the same color, because most of the arc tube problems or line problems itself. Some charger to charge the battery for some time, the indicator color change for a long time, this is mostly charger constant value is too high, and that the battery is not supporting the actions must be replaced with matching charger. Otherwise, It will cause overcharge, causing the battery to heat, and in severe inflation battery.
60, why can not the battery is fully charged?
Chargers work for some time, and will automatically stop, no current and voltage, which is a circuit problem may be virtual pad, bad or component failures and the like. Normally, the temperature rises, began to appear normal condition. This phenomenon may occur gradually, sometimes suddenly. Battery can not charge or charge dissatisfaction, it would damage the battery can not be sloppy, should be checked to make repairs to return to normal.
61, why there will be some charge charger charging or stop-and-go charging phenomenon?
Full charge stop may belong to the same charge and dissatisfaction fault line is poor contact.
Stop charging phenomenon is constant and can not be of the same nature, the same serious problem, much more serious than the above two issues, a little attention, it is possible to charge a bad battery.
But this phenomenon is still very few, or the majority of the charger does not often appear similar problems, this charger is not only a few, but mostly used for years relatively old. The proper use of the charger is in the late charge, although most have been filled, but a very small amount of the board is not completely cured material reduction, then let the charger to continue charging 1-2h, in order to achieve complete reduction purposes. When the current display and only 50mA or less unchanged for a long time on the dashboard 200mA ammeter, you can unplug the power. For a positive pulse repair function, unplug the power, you can not take down the cable between the battery and charger, so continue to impact pulse sulfide crystals that electrode active material reduction.