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Balancing system for a battery pack, balancing circuit and method for controlling balancing of a battery pack

A technology of equalization system and equalization circuit, which is applied in the direction of charge equalization circuit, battery circuit device, arrangement of multiple synchronous batteries, etc., and can solve the problems of battery pack influence and battery pack capacity, etc.

Inactive Publication Date: 2011-10-05
AOTU ELECTRONICS WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this type of battery pack is vulnerable in an unbalanced state, which affects the capacity of the battery pack

Method used

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  • Balancing system for a battery pack, balancing circuit and method for controlling balancing of a battery pack
  • Balancing system for a battery pack, balancing circuit and method for controlling balancing of a battery pack
  • Balancing system for a battery pack, balancing circuit and method for controlling balancing of a battery pack

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Embodiment Construction

[0037] Embodiments of the present invention will be described in detail below. The technical scheme of the present invention can provide a battery pack balancing system, which includes a primary balancing stage and a secondary balancing stage. Wherein, the battery pack includes a plurality of battery modules and each battery module includes a plurality of battery cells; the first-level balancing stage is used for balancing the battery modules, and the second-level balancing stage is coupled with the first-level balancing stage for balancing the batteries in the battery module. unit. The battery pack system provided by the invention can complete the balancing process quickly. The present invention will be described below in conjunction with examples, but it should be understood that this does not mean that the present invention is limited to these examples. On the contrary, the invention is intended to cover various alternatives, modifications and equivalents as defined withi...

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PUM

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Abstract

The invention discloses a balancing system for a battery pack, a balancing circuit and a method for controlling balancing of a battery pack, the battery pack includes multiple modules and each of the modules in the battery pack includes a subset of the cells. The balancing system for a battery pack includes a first balancing stage and a second balancing stage. The first balancing stage can balance an unbalanced module. The second balancing stage coupled to the first balancing stage can balance an unbalanced cell in a module. Via the balancing system, the circuit and the method in the invention, the technique effect of quick balancing can be realized.

Description

technical field [0001] The invention relates to a balancing technology, in particular to a system, circuit and method for balancing a battery pack. Background technique [0002] Today, lithium-ion batteries are used in green vehicles such as electric vehicles and hybrid vehicles. The voltage of a single cell in a lithium-ion battery is about 3 to 4 volts, while electric and hybrid vehicles typically require up to more than 100 volts, so battery packs containing multiple cells coupled in series are often used to drive electric and hybrid vehicles. [0003] To facilitate battery management, the battery cells in the battery pack are divided into multiple modules, where each module contains a certain number of battery cells. But this type of battery pack is susceptible to unbalanced conditions, which affects the capacity of the battery pack. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a battery pack balancing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCY02T10/7055H02J7/0019H02J7/0016Y02T10/70
Inventor 栗国星
Owner AOTU ELECTRONICS WUHAN
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