1、引言由于制造工艺及操作环境的不均匀，串联锂离子电池组存在容量和内阻

1. Introduction <BR>Due to the uneven manufacturing process and operating environment, there are inconsistencies in capacity, internal resistance, and temperature in series-connected lithium-ion battery packs. This not only leads to low capacity utilization of the lithium battery pack and affects the use time of the electric device, but also causes the lithium battery pack to be overcharged or overdischarged, resulting in a decrease in the service life of the lithium battery pack, which leads to an increase in the use cost of the electric device, and even causes Some safety issues such as a fire in the battery pack threaten the lives of users. Therefore, it is necessary to study the equalization technology of lithium battery pack to make full use of the capacity of the battery pack and improve the operational safety of the battery pack.

1, introduction<BR>Due to the uneven manufacturing process and operating environment, the series lithium-ion battery pack has the insistency of capacity and internal resistance and temperature. This not only leads to low capacity utilization of lithium battery packs and thus affects the use of electrical devices, but also causes lithium battery packs to overcharge or over-discharge, resulting in a decrease in the service life of lithium battery packs, which in turn leads to increased cost of using electrical devices, and may even cause some safety problems such as battery pack fire, thus threatening the life and safety of users. Therefore, it is necessary to study the balance technology of lithium battery pack to make full use of the capacity of battery pack and improve the operation safety of battery pack.

1. Introduction<BR>Due to the uneven manufacturing process and operating environment, the capacity, internal resistance and temperature of series lithium-ion batteries are inconsistent. This will not only lead to the low capacity utilization rate of lithium battery pack, which will affect the service time of electric devices, but also lead to overcharge or overdischarge of lithium battery pack, which will lead to the decline of the service life of lithium battery pack, which will increase the use cost of electric devices, and even cause some safety problems such as battery pack fire, which will threaten the life safety of users. Therefore, it is necessary to study the equalization technology of lithium battery pack in order to make full use of the capacity of the battery pack and improve the operation safety of the battery pack.<BR>