What is the core technology of button battery cr2032 management system?

　　What is the core technology of BMS?

　　I recently saw a promotional sign from a domestic company that claims to have “comprehensive mastery of battery management system (BMS) software and hardware technology”, “reach the world’s advanced level”, and “adopt multiple equalization control capabilities” because of its use of underlying software such as AUTOSAR’s software architecture. ". Very eye-catching. Are these the core technologies of BMS?

　　Usually, the BMS system usually includes a detection module and arithmetic control module.

　　Detection refers to measuring the voltage, current and temperature of the cell and the voltage of the battery pack, and then transmitting these signals to the computing module for processing and issuing instructions. Therefore, the computing control module is the brain of BMS. The control module generally includes hardware, basic software, runtime environment (RTE) and application software. The most core part - application software. The environment developed with Simulink is generally divided into two parts: battery status estimation algorithm and fault diagnosis and protection. State estimation includes SOC (StateOfCharge), SOP (StateOfPower), SOH (StateofHealth), as well as balancing and thermal management.

　　Battery status estimation usually estimates SOC, SOP and SOH. SOC (state of charge) simply means how much power is left in the battery; SOC is the most important parameter in BMS, because everything else is based on SOC, so its accuracy and robustness (also called error correction ability) is extremely important. If there is no accurate SOC, no matter how many protection functions are added, the BMS will not be able to work properly, because the battery will always be in a protected state, and the life of the battery will not be extended.

　　In addition, the estimation accuracy of SOC is also very important. The higher the accuracy, the higher the cruising range can be for a battery of the same capacity. Therefore, high-precision SOC estimation can effectively reduce the required battery cost. For example, Chrysler's Fiat 500eBEV can always discharge SOC=5%. It became the electric vehicle with the longest range at that time.

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