Title:
EQUALIZING CHARGING CIRCUIT FOR SUPER-POWER BATTERY FOR LOCOMOTIVE, AND CONTROL AND MANAGEMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2021/068552
Kind Code:
A1
Abstract:
An equalizing charging circuit for a super-power battery for a locomotive, and a control and management method. According to the charging circuit, single batteries are first connected in parallel and then connected in series to form a battery pack, multiple battery packs are connected in series to form a power supply branch circuit, each branch circuit is connected in parallel to an intermediate direct current loop by means of an anti-parallel diode of an IGBT for supplying power to a load, and the multiple branch circuits share a pre-charging resistor to charge an intermediate direct current loop capacitor. The charging control and management method comprises: during charging, each branch circuit is controlled by an independent IGBT to separately control a charging current of each branch circuit, so that the battery states of charge (SOC) of the branch circuits are consistent and voltages thereof are equalized. The solution can avoid a circulating current between branch circuits, keep the SOC of the branch circuits consistent, reduce the voltage difference between the branch circuits, better exert the performance of the battery, and prolong the battery service life.
Inventors:
LI RUHUA (CN)
WANG PINGHUA (CN)
MENG YUANWEN (CN)
WANG PINGHUA (CN)
MENG YUANWEN (CN)
Application Number:
PCT/CN2020/097631
Publication Date:
April 15, 2021
Filing Date:
June 23, 2020
Export Citation:
Assignee:
CRRC ZIYANG CO LTD (CN)
International Classes:
B60L58/22; B60L7/10; B60L58/12; H02J7/00
Foreign References:
| CN110254294A | 2019-09-20 | |||
| CN210706987U | 2020-06-09 | |||
| CN110654268A | 2020-01-07 | |||
| CN106786965A | 2017-05-31 | |||
| CN103419670A | 2013-12-04 | |||
| US20140312913A1 | 2014-10-23 |
Attorney, Agent or Firm:
CHENGDU JIUDING TIANYUAN INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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