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Title:
BATTERY EQUALIZATION METHOD AND SYSTEM, VEHICLE, STORAGE MEDIUM, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/042398
Kind Code:
A1
Abstract:
A battery equalization method and system, a vehicle, a storage medium, and an electronic device. The method comprises: obtaining voltage values of cells to be equalized in a battery pack (S51); obtaining reference voltage values required for equalization (S52); determining, according to the voltage values of the cells to be equalized, the reference voltage values, and a preset equalization duty cycle, a target equalization duration of the cells to be equalized (S53), wherein the equalization duty cycle is a ratio of an equalization period within a unit cycle to the unit cycle, the unit cycle comprising the equalization period and a sampling period; and according to the target equalization duration, controlling, within the equalization period of the unit cycle, the equalization of the cells to be equalized (S54). By means of the method, sampling and equalization can be performed separately within the unit cycle so as to ensure the accuracy of acquired cell information, the calculated equalization duration is accurate, and the equalization effect of the battery pack is also improved.

Inventors:
LUO, Hongbin (No. 3009, BYD Road Pingsha, Shenzhen Guangdong 8, 518118, CN)
WANG, Chao (No. 3009, BYD Road Pingsha, Shenzhen Guangdong 8, 518118, CN)
SHEN, Xiaofeng (No. 3009, BYD Road Pingsha, Shenzhen Guangdong 8, 518118, CN)
ZENG, Qiuyong (No. 3009, BYD Road Pingsha, Shenzhen Guangdong 8, 518118, CN)
LIU, Yuanhong (No. 3009, BYD Road Pingsha, Shenzhen Guangdong 8, 518118, CN)
ZHANG, Xiang (No. 3009, BYD Road Pingsha, Shenzhen Guangdong 8, 518118, CN)
Application Number:
CN2018/103468
Publication Date:
March 07, 2019
Filing Date:
August 31, 2018
Export Citation:
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Assignee:
BYD COMPANY LIMITED (No. 3009, BYD Road Pingsha, Shenzhen Guangdong 8, 518118, CN)
International Classes:
B60L11/18
Domestic Patent References:
WO2014090560A22014-06-19
Foreign References:
CN207241459U2018-04-17
CN104079016A2014-10-01
CN105429236A2016-03-23
CN104377776A2015-02-25
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (Room 301 Trade Building, Zhaolanyuan Tsinghua University, Qinghuayuan, Haidian District, Beijing 4, 100084, CN)
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