Power battery knowledge, what is 21700 battery management system BMS

　　Power battery knowledge, what is the 21700 battery management system BMS? The three core technologies of new energy vehicles (battery, motor, and electronic control), power battery knowledge is a must for OEM engineers. In layman's terms, the 21700 battery management system BMS is the circuit protection board. In order to ensure the normal, efficient and stable charging and discharging of the battery, it will be equipped.

　　Power battery knowledge

　　1. Single power battery

　　The smallest unit that makes up a battery module. It is generally composed of a positive electrode, a negative electrode, an electrolyte, a separator, a shell and an end (pole), and can achieve direct conversion between electrical energy and chemical energy.

　　2. Power battery module

　　The smallest grouping of a single power battery connected to physical structures and circuits to form a power battery pack or system that can be replaced by a single unit.

　　3.Power battery pack

　　An energy storage device, including cells or modules, usually including battery electronic components, high-voltage circuits, overcurrent protection devices and battery boxes.

　　and interfaces with other external systems such as cooling, high voltage, auxiliary low voltage and communications.

　　4. Series and parallel connection of batteries

　　NOTE: The greater the number of combined cells, the less reliable the battery pack will be. Generally speaking, combined batteries should use the same series of batteries with uniform size and the same performance. This is what we often call the uniformity of the battery. Common performance parameters: voltage, capacity and internal resistance. The battery pack is composed of battery cells and series modules in parallel.

　　5. Battery naming method

　　Different manufacturers have different naming rules, but we all follow unified standards for general batteries. According to the name of the battery, you can know the size of the battery, etc.

　　What is 21700 battery management system BMS?

　　Lithium batteries have safety issues from the time they are produced until they are recycled at the end of their life. Even if they fully comply with international safety standards when they leave the factory, they will evolve from a safe state to an unsafe state during use. The performance of good-quality single cells will gradually decline and reach the end of their life. At the limit, the performance of single batteries with poor quality will gradually experience various abnormal degradations and declines during use, and enter the feared unsafe state.

　　BMS is actually a battery management system. As the name suggests, it is a module specially used to manage the operation and management of lithium batteries. The object is lithium batteries.

　　The 21700 battery management system (BMS) is a control system that protects the safety of power batteries. It monitors the usage status of the battery at all times, takes necessary measures to alleviate the inconsistency of the battery pack, and provides guarantee for the safety of new energy vehicles.

　　The 21700 battery BMS management system is not dispensable as some battery manufacturers say, but a must. The 21700 battery management system can ensure the safety of the power 21700 battery pack, which is the primary task of the lithium power battery management system.

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