Bluetooth BMS

1. Battery protection, similar to PCM, has the functions of overcharge, over discharge, over temperature and over current, as well as short circuit protection. If the temperature of the battery exceeds the working temperature of the battery or the current is greater than the discharge current of the battery, the system will automatically cut off the current path to ensure the safety of the battery and the system.
2. Energy balance: the whole battery pack, due to many batteries in series, after working for a certain period of time, due to the inconsistency of the cell itself and the inconsistency of working temperature, it will eventually show great difference, which has a great impact on the life of the battery and the use of the system. Energy balance is to make up for the differences between individual cells to do some active or passive Charge or discharge management to ensure battery consistency and prolong battery life.
3. SOC calculation, battery power calculation is a very important part of BMS, many systems need to know the remaining power more accurately. Due to the development of technology, there are many methods for SoC calculation. Those with low accuracy requirements can judge the remaining power according to the battery voltage. The main accurate methods are current integration method (also called ah method), q = ∫ IDT, internal resistance method, neural network method, Kalman filter method, etc. The mainstream of the industry is still the current scoring method.