Current-limiting control system of parallel battery packs and control method thereof

Abstract

The invention discloses a current-limiting control method of parallel battery packs. The current-limiting control method is applied to communication base stations and is used for limiting size of circulation current of the parallel battery packs during charging and discharging. The parallel battery packs comprises a plurality of parallel battery packs; the parallel battery pack current-limiting control method comprises the following steps: reading current-limiting information of the parallel battery packs and detecting the number of the parallel battery packs and matching corresponding current-limiting information according to the detected number of the parallel battery packs; controlling a current limiting unit to limit the current of the parallel battery packs level by level according toa current limiting value of each current limiting level and preset current-limiting time. The invention also provides a current-limiting control system of parallel battery packs.

Description

【Technical field】 [0001] The invention relates to the technical field of battery management, in particular to a parallel battery pack current limiting control system and control method. 【Background technique】 [0002] With the strengthening of policy support, the acceleration of the construction of supporting facilities, and the environmental background of comprehensive promotion and application in various places, new energy vehicles have maintained rapid growth and the industry has a bright future. Especially with the continuous expansion of the types of new energy vehicles, the application fields of lithium-ion batteries are also expanding. In addition to being used in small power systems, such as electric tools and electric power-assisted tricycles, lithium-ion batteries are also gradually used in communication base stations. Due to the large capacity, high cycle times, and high space utilization of the power supply of the communication base station, multiple battery pack...

AI Technical Summary

Problems solved by technology

Due to the large capacity, high cycle times, and high space utilization of the power supply of the communication base station, multiple battery packs are generally connected in parallel. However, due to the difference in the voltage of the battery packs, when the parallel battery packs are running, a battery pack with high voltage will be formed between the battery packs. Charging the battery pack with low voltage (this is circulating current), when the voltage difference between the battery packs is large, due to the small internal resistance of the battery pack, a large circulating current will be formed between the battery packs, and even the fuse will be blown, affecting Normal operation of the battery pack

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