The principle of charging and discharging wooden barrels for power batteries: As the service life of electric vehicles increases, the gap between single cells will gradually enlarge, and industrial manufacturing cannot guarantee that each battery is 100% the same. Assuming that the voltages of the two single cells are exactly the same, but they are located in different positions in the battery module, there may be a case where the ambient temperature of single cell 1 is higher than that of single cell 2, then the single cell will There will also be differences, and the differences will gradually increase with the age of use. Using the battery pack cell balancer to balance the power battery is to solve the barrel effect. It can be integrated for the entire power battery. Compared with the single cell balance, the balance speed is faster, and the balance effect is more accurate.
Usually, the power battery as a whole is isolated from the outside world. The internal structure of the power battery cannot be in contact with the outside world through sealing rubber rings, sealants or other methods, which can effectively prevent the aging and corrosion of the battery cells in contact with the air, and at the same time ensure The interior will not be soaked by rainwater, liquid, short circuit, corrosion and leakage. After the power battery is disassembled and overhauled, it is necessary to test the overall air tightness, including the cooling pipeline and the internal air tightness of the power battery.
