Control method and device of passive equalization of battery pack, battery system and vehicle

A passive equalization and control method technology, applied in the field of electronics, can solve the problems of not reaching the equalization effect, long equalization time, low efficiency, etc., and achieve the effect of shortening the equalization time and improving the equalization effect.
CN106340920AActive Publication Date: 2017-01-18NEUSOFT REACH AUTOMOTIVE TECH SHANGHAI CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NEUSOFT REACH AUTOMOTIVE TECH SHANGHAI CO LTD
Publication Date
2017-01-18

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Abstract

The invention provides a control method and device of the passive equalization of a battery pack, a battery system and a vehicle. The method comprises a step of obtaining the temperature data of each single battery of the battery pack in historical use, a step of determining at least one single battery with the need of passive equalization in the battery pack according to the temperature data of each single battery, and a step of opening the passive equalization switch of the at least one single battery in the process of charging or discharging the battery pack. In the embodiment of the invention, in the process of charging or discharging, the determined single battery with the need of passive equalization can be equalized in advance, thus the equalization time can be effectively shortened, the problem that the charging of partial single batteries is completed but the equalization is not completed can be avoided, and the equalization effect is improved.
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Description

technical field

[0001] The invention relates to the field of electronic technology, in particular to a passive equalization control method, device, battery system and vehicle of a battery pack. Background technique

[0002] Due to the influence of factors such as the battery manufacturing process and the difference in the working environment of the battery cells, there is a problem of inconsistent voltage of the battery cells in the battery pack. The voltage inconsistency among the cells directly affects the service efficiency of the battery pack and reduces the service life of the battery pack. Therefore, it is necessary to design a special balancing circuit to balance the battery pack.

[0003] At present, most battery management systems use passive equalization to balance the battery pack, that is, the power resistors at both ends of the battery consume the excess energy of the battery to achieve balance. Usually, the switching on and off of passive equalization can be ...

Claims

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