公开(公告)号：WO2011120415A1

公开(公告)日：2011-10-06

申请号：PCT/CN2011/072227

申请日：2011-03-28

Applicant: BYD COMPANY LIMITED ,  DENG, Linwang ,  ZENG, Yu ,  DENG, Yaming

Inventor： DENG, Linwang ,  ZENG, Yu ,  DENG, Yaming

IPC: H01M10/48 ,  H02J7/00

CPC classification number: H02J7/0014 ,  H01M10/441 ,  H01M10/482 ,  H01M2010/4271 ,  Y10T307/653

Abstract: A parallel device for a battery module and a controlling method thereof. The battery module includes a plurality of battery packs. The parallel device for the battery module includes: a plurality of switching units each comprising a first switch and a load connected in series and each connected with a corresponding one of battery packs in series to form a branch, wherein the branches formed of the plurality of switching units and the plurality of battery packs are connected to each other in parallel; and a controlling module (1) connected to the battery module and collecting a voltage of each battery pack, in order to calculate a voltage difference between voltages of any two of the battery packs, to compare the voltage difference with a first voltage reference to obtain a first voltage comparison, and to control at least one of the first switches corresponding to the any two of the battery packs based on the first voltage comparison. The parallel device for the battery module and the controlling method thereof can effectively avoid a big current impact when the battery packs are connected to each other in parallel, thereby prolonging the lives of the battery packs.

Abstract translation: 一种电池模块的并联装置及其控制方法。 电池模块包括多个电池组。 用于电池模块的并联装置包括：多个开关单元，每个开关单元包括串联连接的第一开关和负载，并且各自与串联的相应的一个电池组串联以形成分支，其中由多个 开关单元和多个电池组并联连接; 以及连接到电池模块并且收集每个电池组的电压的控制模块（1），以便计算任何两个电池组的电压之间的电压差，以将电压差与第一参考电压进行比较，以获得 第一电压比较，并且基于第一电压比较来控制对应于任何两个电池组的至少一个第一开关。 电池模块的并联装置及其控制方法可以在电池组彼此并联连接时有效地避免大的电流冲击，从而延长电池组的寿命。

公开(公告)号：EP3498521A1

公开(公告)日：2019-06-19

申请号：EP17838648.8

申请日：2017-08-04

Applicant: BYD Company Limited

Inventor： DENG, Linwang ,  TENG, Jingcui ,  WANG, Chao ,  ZENG, Yu ,  YANG, Shiqing

IPC: B60L11/18

Abstract: The present invention discloses an energy management system of an electric vehicle, a control method therefor, and an electric vehicle. The system includes: a power battery including a plurality of battery modules; a plurality of balanced DC-DC converter modules, first ends of the balanced DC-DC converter modules being correspondingly connected to the battery modules and second ends of the balanced DC-DC converter modules being connected in parallel to a low-voltage direct-current bus; a bidirectional car charger having an alternating-current end configured to connect to a power grid/charging box, a first direct-current end connected to the low-voltage direct-current bus, and a second direct-current end connected to a high-voltage direct-current bus; a sampling module; and a control module configured to separately control each balanced DC-DC converter module according to the state information of each battery module, the state information of the low-voltage battery, the state information of the power battery and the load information of the low-voltage electric apparatuses to perform balancing management on the plurality of battery modules, supply power to the low-voltage electric apparatuses, and charge the low-voltage battery, and controlling the bidirectional car charger to supply power to the low-voltage electric apparatuses and charge the low-voltage battery. The system realizes the power supply to the low-voltage components of the entire vehicle, the balancing of the power battery and the redundancy design of key functions, and improves the safety and reliability of the system.