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1. WO2019042357 - BATTERY EQUALIZATION METHOD AND SYSTEM, VEHICLE, STORAGE MEDIUM, AND ELECTRONIC DEVICE

Publication Number WO/2019/042357
Publication Date 07.03.2019
International Application No. PCT/CN2018/103253
International Filing Date 30.08.2018
IPC
H02J 7/00 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
7Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H01M 10/44 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
44Methods for charging or discharging
CPC
B60L 11/1868
H01M 10/44
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
44Methods for charging or discharging
H02J 7/00
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
7Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 7/0019
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
7Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
0013acting upon several batteries simultaneously or sequentially
0014Circuits for equalisation of charge between batteries
0019using switched or multiplexed charge circuits
Y02E 60/10
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
60Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
10Energy storage using batteries
Y02T 10/70
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
10Road transport of goods or passengers
60Other road transportation technologies with climate change mitigation effect
70Energy storage systems for electromobility, e.g. batteries
Applicants
  • 比亚迪股份有限公司 BYD COMPANY LIMITED [CN]/[CN]
Inventors
  • 罗红斌 LUO, Hongbin
  • 王超 WANG, Chao
  • 沈晓峰 SHEN, Xiaofeng
  • 曾求勇 ZENG, Qiuyong
  • 刘苑红 LIU, Yuanhong
  • 张祥 ZHANG, Xiang
Agents
  • 北京清亦华知识产权代理事务所(普通合伙) TSINGYIHUA INTELLECTUAL PROPERTY LLC
Priority Data
201710776106.431.08.2017CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) BATTERY EQUALIZATION METHOD AND SYSTEM, VEHICLE, STORAGE MEDIUM, AND ELECTRONIC DEVICE
(FR) PROCÉDÉ ET SYSTÈME D'ÉGALISATION DE BATTERIE, VÉHICULE, SUPPORT D’INFORMATIONS ET DISPOSITIF ÉLECTRONIQUE
(ZH) 电池均衡方法、系统、车辆、存储介质及电子设备
Abstract
(EN)
A battery equalization method, comprising: determining performance parameters of cells according to cell information of the cells of a battery pack within a sampling period of a unit cycle, the unit cycle comprising the sampling period and an equalization period; when the performance parameter of any of the cells in the battery pack satisfies an equalization duty cycle adjustment condition corresponding to the performance parameter, adjusting the equalization duty cycle of at least one of the cells comprising the cell in the battery pack, the equalization duty cycle being a ratio of the duration of the equalization period to the duration of the unit cycle, the performance parameter comprising at least one of the following parameters: voltage, SOC, internal resistance, self-charge rate, voltage change rate, power change rate, and time change rate. By means of the method, the duration of an acquisition period and the duration of the equalization period can be controlled, thereby improving equalization efficiency and reducing equalization costs. Also provided are a battery equalization system, a vehicle, a computer-readable storage medium, and an electronic device.
(FR)
L'invention concerne un procédé d'égalisation de batterie, consistant à : déterminer des paramètres de performance de cellules en fonction d'informations de cellule relatives aux cellules d'un bloc-batterie au cours d'une période d'échantillonnage d'un cycle unitaire, le cycle unitaire comprenant la période d'échantillonnage et une période d'égalisation ; lorsque le paramètre de performance de l'une quelconque des cellules du bloc-batterie satisfait une condition d'ajustement de cycle de service d'égalisation correspondant au paramètre de performance, ajuster le cycle de service d'égalisation d'au moins une des cellules comprenant la cellule du bloc-batterie, le cycle de service d'égalisation étant un rapport de la durée de la période d'égalisation à la durée du cycle unitaire, le paramètre de performance comprenant au moins l'un des paramètres suivants : tension, état de charge, résistance interne, taux de charge propre, taux de variation de tension, taux de changement de puissance et taux de changement de temps. Au moyen du procédé, la durée d'une période d'acquisition et la durée de la période d'égalisation peuvent être commandées, ce qui permet d'améliorer l'efficacité d'égalisation et de réduire les coûts d'égalisation. L'invention concerne également un système d'égalisation de batterie, un véhicule, un support d'informations lisible par ordinateur et un dispositif électronique.
(ZH)
一种电池均衡方法,包括:根据单位周期的采样时段内获取的电池组各单体电池的电池信息,确定各单体电池的性能参数,所述单位周期包括所述采样时段和均衡时段;当电池组中任一单体电池的性能参数满足与该种性能参数对应的均衡占空比调整条件时,对所述电池组中包括该单体电池的至少一个单体电池的均衡占空比进行调整,所述均衡占空比为所述均衡时段的时长与所述单位周期的时长的比值,所述性能参数包括以下参数中的至少一种:电压、SOC、内阻、自放电率、电压变化率、电量变化率及时间变化率。该方法能够控制采集时段的时长和均衡时段的时长,提高了均衡效率,降低了均衡成本。一种电池均衡系统、一种车辆、一种计算机可读存储介质和一种电子设备。
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