What are the test methods for electric vehicle lithium battery packs

1. Multimeter test the battery capacity of electric vehicles. The most accurate way to professionally detect the battery capacity is to detect the overflowing electricity with a discharge meter, Cu003dWu003dIUt, that is, the capacity is equal to the discharge current ampere (A) X voltage volt (V) X time seconds Or hours (S or H), generally discharge with a rated capacity of 0.5 to 2 times current. For example, a 12AH battery is fully charged and discharged for two hours at the rated voltage and current as the eligibility standard. The current is inversely proportional to the discharge time and the discharge capacity. The discharge current The larger the rate is, the discharge time is more than one hour, and the discharge capacity is about 8AH. On the contrary, when the discharge rate is 0.5, it can discharge more than 15AH in two hours. 2. Professional testing methods for lithium battery packs for electric vehicles 1. After the battery is overcharged, connect the battery, ammeter, and resistance wire. 2. The internal circuit of the battery is open. Some electric vehicle lithium battery packs have an internal open circuit, which is manifested as the battery has voltage and no current, and the vehicle has electricity and the motor does not rotate. If the vehicle is normal after replacing a set of new batteries, it is a battery problem. 3. The green light of the charger does not change, and the green light of the charger does not change when charging. The green light of the charger is on when the charger is unloaded. Generally, it is caused by the lack of water or scarce sulfuric acid inside the battery. After opening the battery cover, unscrew the one-way Valve or safety valve, inject an appropriate amount of special replenisher into the battery, and charge for 6-10 hours to switch. 4. The electric vehicle has a short continuous running mileage. Test whether the no-load current and running current of the whole vehicle are too large. The no-load current should not exceed 1.2A. The running current should be at a load of 75kg, a speed of 20km/h, and when driving on a flat cement or asphalt road. It should not be greater than 7.5A. If the above situation occurs, replace the controller or motor and perform detection again. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages of the new 21700 lithium battery