How to determine whether the lithium ion battery of electric vehicle is broken

First, make sure the lithium battery is 36 V, 10 Ah. It needs to be 20 Ah.

The identification of lithium battery issue is troublesome, because it needs professional institutions to identify. It is not precise to check it by ourselves, and could not persuade the factory;

Suggestions: 1) find a electrician to help you measure voltage when charged, might be more than 41 v;2) to measure again lithium electricity runs out of pool voltage, it should be at around 30.5 V.3) record run mileage,4) when the electric current, reference is 10 a.

If the data deviation is large, should be a lithium battery

You can buy a electric stove wire in the market, the series into the battery to discharge to measure the discharge current of the battery, according to the current and time (hours) is the product of the battery capacity. Small shops to you there is no need to put all spend thousands of yuan to buy batteries, use electric stove wire about capacity of the tested data can meet the need.

In single voltage of 13.0 V above, group battery open circuit voltage difference is not greater than 0.05 V. Under normal circumstances full electric open circuit voltage is 0.03 V, in the process of the discharge of the battery test, make a record of each battery voltage, discharge at the end of only 10.5 V, discharge the last process of voltage difference should be controlled within 0.3 V.

One way is to balance the weight, if weight is insufficient, is suspected to cut corners, only 10 ah4. 1 kg, 12 ah, 4.3 kg, 14 ah 4. 5 kg, 17 ah, 6. 3 kg, 20 ah, 6. 8 kg.

10 ah battery in the temperature of 25 ℃ plus or minus 2 ℃ environment condition after fully charged, let stand for 1 ~ 5 h in section 5.0 A current discharge to single battery voltage of 10.50 V, the discharge time should not less than 120 min.

12 ah battery in the temperature of 25 ℃ plus or minus 2 ℃ environment condition after fully charged, let stand for 1 ~ 5 h in section 5.0 A current discharge to single battery voltage of 10.50 V, the discharge time should not less than 135 min.

14 ah battery in the temperature of 25 ℃ plus or minus 2 ℃ environment condition after fully charged, let stand for 1 ~ 5 h in section 5.0 A current discharge to single battery voltage of 10.50 V, the discharge time should not less than 150 min.

To detect the single voltage, insert the single detector six pens and in turn into six inside, press the test button, observe the seven table reading changes, the voltage drop is more than the other, which shows that the corresponding lattice damaged, out of the battery to repair manual open shell.

You do are not enough, then the amount of voltage must be 3 pieces are the same, and all is normal, if you really have no other tools, can be like this: when electricity is going to run out, to the rear wheels of the car overhead (for measurement purposes), open the battery warehouse, then start the car (overhead, car to walk not bubble, is in the idle), at the same time, the battery voltage is measured with a multi-meter, if which significantly less than 12 v battery or was obviously lower than other batteries, means that the battery is broken, and if the three are all the same, and it is normal, and you are sure that your battery is a broken, shows you the battery discharge is incomplete, should put some toilet after electric quantity

You do are not enough, then the amount of voltage must be 3 pieces are the same, and all is normal, if you really have no other tools, can be like this: when electricity is going to run out, to the rear wheels of the car overhead (for measurement purposes), open the battery warehouse, then start the car (overhead, car to walk not bubble, is in the idle), at the same time, the battery voltage is measured with a multi-meter, if which significantly less than 12 v battery or was obviously lower than other batteries, means that the battery is broken, and if the three are all the same, and it is normal, and you are sure that your battery is a broken, shows you the battery discharge is incomplete, you should put some toilet after electric quantity,

To match the electric vehicle battery disconnect, with high rate discharge meter (cross) is also called the discharge test battery, respectively for each single battery test. According to the test result judgment the battery of electric vehicles is one of them is damaged, or the whole damage. High rate discharge meter (also called discharge fork) the use of the method and the judgment method can see how good the battery discharge fork the enclosed specification.

Electric vehicle battery in the product life cycle, with the exposure test environment is facing various environmental factors, lead to battery products in a long time under the environmental effect of accelerated aging, make the battery in normal use cycle generating failure, especially in the harsh temperature and humidity environment, the battery may be because of the influence of the environment has changed the original function or charge and discharge characteristics of a design, and may lead to traffic safety.

Electric vehicle charging note:

1, a network connecting wires, once the circuit malfunction, and it is easy to cause fire;

2, to change the car electric circuit, to replace the large capacity battery, easy to cause the wire overload, short circuit, etc.;

3, buy inferior charger or don't match with original battery charger, easy to cause electrical failure;

4, aging cells continue to use, a mixture of different capacity batteries, easy to cause fire;

5, electric WeiDang, cushion, lamps and lanterns made of polymer materials burning speed, the material and produce large amounts of toxic smoke;

6, some do not have the production conditions of soho to assembling electric car sales, random line and battery, and assembly process of unreasonable, the lack of quality control.

According to the following method to check, if do not have the following problem is normal.

First of all, you can check the presence of ballooning, leakage, burning and other abnormal circumstances through the appearance. When the battery failure cannot judge by the intuitive way, it needs an open circuit voltage test and computer test for battery capacity. It needs to use the computer. Those batteries that need an open circuit voltage test and computer test for battery capacity are divided into abnormal voltage battery, over discharge battery, discharge time anomaly battery, heat-up rechargeable battery, etc.

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