Equalization circuit structure between single batteries and battery pack, and method

A battery cell and equalization circuit technology, applied in the direction of charge equalization circuit, battery circuit device, circuit device, etc., can solve problems that have not been widely used, large number, and complexity

Active Publication Date: 2017-10-24
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, active equalization has not been widely used due to a large number of components and complex control.

Method used

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  • Equalization circuit structure between single batteries and battery pack, and method
  • Equalization circuit structure between single batteries and battery pack, and method
  • Equalization circuit structure between single batteries and battery pack, and method

Examples

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0036] refer to figure 1 , a balance circuit structure between a battery cell and a battery pack, including more than two battery cells C, a transformer T, a switch MOSFETM, and all battery cells C ij Connected in series, i=1~n, j=1~m, each battery cell C is connected in parallel with a switch MOSFETM ij ; Every adjacent m battery cells form a group, m=2, 3, ..., using transformer T forward coupling, each group is connected with the overall battery pack using transformer T flyback to form a module, such as a module 1 battery cell C 11 、C 12 ,...,C 1m Shared transformer T with the battery pack 1 , where the battery cell C 11 、C 12 ,...,C 1m Forward coupling with each other, and flyback coupling with the battery pack, combining the forward and flyback working principles of the transformer to transfer energy between the battery cell and the battery pack.

[003...

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PUM

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Abstract

The invention relates to an equalization circuit structure between single batteries and battery packs, and an equalization method of the equalization circuit structure. The equalization circuit structure comprises two or more single batteries, wherein all the single batteries are connected in series, each single battery is connected with a switch in parallel, every m adjacent single batteries form a pack and are forwardly coupled by means of a transformer, and each pack is in flyback connection with the integral battery pack by means of the transformer so as to form a module. The equalization method is characterized in that: energy is transferred between the battery modules and the integral battery pack by utilizing a transformer flyback principle; meanwhile, the m batteries in the same module realize energy transfer under the forward action of the transformer. According to the equalization circuit structure and the equalization method, good equalization effect is ensured, the numbers of switching tubes and coil windings are reduced, the structural cost is decreased, the combination of forward and flyback principles is realized, and the equalization speed is accelerated.

Description

technical field [0001] The invention belongs to the technical field of battery equalization, and in particular proposes a structure and method of an equalization circuit between a battery cell and a battery pack. Background technique [0002] With the continuous aggravation of environmental pollution and energy crisis, electric vehicles have attracted widespread attention due to their advantages such as low environmental pollution and high energy utilization. As the energy source of electric vehicles, batteries play a vital role in the operation of electric vehicles. At the same time, battery problems have always been one of the bottlenecks of electric vehicles, and it is difficult to make major breakthroughs in the short term. How to maximize the role of batteries under the existing technical conditions has become the focus of battery technology research. [0003] During the production process, there are differences in the production process and materials of the battery ce...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0016
Inventor 徐俊李玉梅雪松
Owner XI AN JIAOTONG UNIV
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