Introduction to Li-ion battery BMS

Lithium-ion battery BMS generally appears in lithium-ion batteries instead of lead-acid batteries. This is a well-known thing, so why do lithium-ion batteries have one more BMS than lead-acid batteries? This is closely related to the material properties of the lithium-ion battery itself. First of all, in terms of materials, the lithium of lithium-ion batteries is more active than the lead of lead-acid batteries. The negative electrode material of lithium-ion batteries is combustible. If you want to achieve the same safety as lead-acid batteries, lithium-ion battery cells must be separated , Shell and other materials are made stronger and thicker, so that lithium-ion batteries will be heavier and larger than lead-acid batteries. Obviously, human wisdom does not allow this to happen. Secondly, although lithium-ion batteries have more advantages than other types of batteries, they are also limited by factors such as cell materials and current manufacturing processes, resulting in internal resistance, capacity, and voltage between single-cell lithium-ion batteries. Therefore, in actual applications, the individual cells in the battery pack are prone to uneven heat dissipation or excessive charging and discharging. Over time, these batteries in poor working conditions are likely to be damaged in advance, and the overall life of the battery pack is greatly shortened. Finally, if the battery is in a severely overcharged state, there is still a danger of explosion, which may cause damage to the battery pack and threaten the personal safety of the user. Therefore, in many respects, it is advantageous to give a BMS to a lithium-ion battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet, please contact to delete if there is any infringement. Previous: What are the requirements for charging lithium-ion batteries