A quick way to judge whether the battery is good or bad

Here is a quick way to judge whether the battery is good or bad. It is suspected that there is a problem with the battery and the electric vehicle battery will be used up! Then check the idling situation of the electric vehicle with a multimeter, measure the batteries one by one, and find that there are 1-2 batteries whose voltage is lower than other batteries Above 1.5v, the battery failure can basically be judged! [Only applicable to judgment. To carry out a capacity test, but do not confirm] Hello, the electric vehicle battery capacity test is a special instrument! It is called a capacity detector! What specifications does the battery discharge according to what kind of discharge current! Until the cut-off voltage. Judge the battery according to the displayed time! It is impossible to measure the capacity with a multimeter! The multimeter measures the voltage with two red and black wires. When the black wire is inserted into the hole, the COM red wire is inserted into 4V, because the battery is 12V series 48V and the four transmission gears are measured. 100V range. Measure the shift to the 20V range ok! According to the prompt of the monitor, you know what the voltage is. Generally speaking, after a battery is fully charged and rested for 24 hours, the voltage difference of each battery should not exceed 0.03-0.05v [new battery]. The old battery should not be greater than 0.3V. Disconnect the battery of the electric vehicle. Use a high-rate discharge meter (also called a discharge fork) to test the battery. Test each battery individually. According to the test results, the battery of the electric car is damaged, or the whole group is damaged. The use method and battery quality judgment method of the high-rate discharge meter (also called the discharge fork) are shown in the discharge fork attached to the manual. During the product life cycle of electric vehicle batteries, various environmental factors faced by the exposure test environment have led to accelerated aging of battery products under the influence of the environment for a long period of time, causing the battery to fail during the normal use cycle, especially during the normal use cycle. Under severe temperature and humidity environment, the battery may be changed due to environmental influences to the original function or charging and discharging characteristics of the design, and may lead to traffic safety. Precautions for charging electric vehicles: 1. Improper connection of the wire, once it fails, it is easy to cause a fire; 2. Unauthorized modification of the circuit in the car, unauthorized replacement of the large-capacity battery, easy to cause line overload, short circuit, etc.; 3. Purchase a low-quality charger or A charger that does not match the original battery is likely to cause electrical failure; 4. Continued use of aging batteries, mixing of batteries with different capacities may easily lead to fire; 5. The shell, seat cushion, and lamps of electric vehicles are all made of polymer materials, which burn quickly , There is a lot of toxic smoke; 6. Some self-employed people who do not have production conditions assemble and sell electric cars, choosing wiring and batteries at will. In addition, the assembly process is unreasonable and lacks quality control. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: The first mobile power national standard will be implemented in August