Title:
BATTERY EQUALIZATION CIRCUIT AND CONTROL METHOD THEREFOR, AND UNINTERRUPTED POWER SUPPLY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/012804
Kind Code:
A1
Abstract:
Provided in the present application is a battery equalization circuit, which is used to solve the problem in which differences between multiple cells in a battery pack cause some cells to charge or discharge insufficiently. In the battery equalization circuit, each equalization sub-circuit comprises a single cell, a first two-way switch, and a second two-way switch. Single cells in multiple equalization sub-circuits are sequentially connected in series. A first end of the first two-way switch is coupled to a positive pole of a single cell, and a second end thereof is coupled to a first end of an energy storage device. A gating end of the first two-way switch is powered on upon receiving a power-on signal, and the positive pole of the single cell is coupled to the first end of the energy storage device. A first end of the second two-way switch is coupled to a negative pole of the single cell, and a second end thereof is coupled to a second end of the energy storage device. A gating end of the second two-way switch is powered on upon receiving a power-on signal, and the negative pole of the single cell is coupled to the second end of the energy storage device. In addition, further provided in the present application are a control method for the described battery equalization circuit and an uninterrupted power supply system that employs the described battery equalization circuit.
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Inventors:
ZHANG CHUNTAO (CN)
Application Number:
PCT/CN2020/094227
Publication Date:
January 28, 2021
Filing Date:
June 03, 2020
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H02J7/00; H02J9/06
Domestic Patent References:
| WO2019093153A1 | 2019-05-16 |
Foreign References:
| CN110460125A | 2019-11-15 | |||
| CN104935051A | 2015-09-23 | |||
| CN102170029A | 2011-08-31 | |||
| CN201910667923A | 2019-07-23 |
Attorney, Agent or Firm:
BEIJING ZBSD PATENT&TRADEMARK AGENT LTD. (CN)
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