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Battery balancing control method and system based on maximum average balancing current

A technology of equalizing current and equalizing control, which is applied in battery circuit devices, secondary battery charging/discharging, and secondary battery repair/maintenance, etc. The effect of optimizing circuit parameters

Inactive Publication Date: 2015-12-02
理工大高新技术研究院(高邮)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a fast equalization speed and high energy utilization rate based on the maximum average Battery balancing control method and system for balancing current

Method used

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  • Battery balancing control method and system based on maximum average balancing current
  • Battery balancing control method and system based on maximum average balancing current
  • Battery balancing control method and system based on maximum average balancing current

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] like figure 1 As shown, the battery balancing control system based on the maximum average balancing current in the embodiment of the present invention includes a battery pack 10 , a detection circuit 20 , a balancing circuit 30 and a balancing control circuit 40 . The battery pack 10 in the embodiment of the present invention includes four lithium batteries connected in series as an example. The idea of ​​the embodiment of the present invention is: use four lithium batteries connected in series as a battery pack, and a decentralized control DC / DC converter as the equalization circuit of the...

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Abstract

The invention discloses a battery balance control method and a battery balance control system based on the largest average balance current. The system comprises a battery pack, a detection circuit, a balance circuit and a balance control circuit, wherein the detection circuit is used for detecting voltage of each battery in real time; the balance circuit is connected with the battery pack and comprises power switching tubes and inductors, wherein the power switching tubes and the inductors respectively correspond to each battery, and inductance values of the inductors are different; the balance control circuit is used for comparing the voltage of each battery, and when the voltage difference between different batteries exceeds a preset threshold, the frequency of the power switching tubes which respectively correspond to each batteries is respectively adjusted, so as to control the balance current of each battery; when the voltage of each battery in the battery pack is consistent, balance control is stopped. According to the method and the system, circuit parameters are optimized in advance through theoretical derivation, so that each battery in different positions has the capability of reaching the same largest average balance current, the balance current is adjusted by adjusting the frequency, so that all of the batteries are balanced at the same time, and the balance efficiency is improved.

Description

technical field [0001] The invention relates to battery balancing control, in particular to a battery balancing control method and system based on maximum average balancing current. Background technique [0002] Lithium batteries have the advantages of large capacity, non-memory, high working voltage, high energy density, low self-discharge rate, and no pollution, and are more and more widely used in the field of electric vehicles. Due to the low working voltage of a single battery, multiple batteries are usually used in series in order to meet the voltage requirements. Due to the inconsistency between battery cells, and with the increase of charge and discharge times, the inconsistency of the battery pack gradually increases. The inconsistency of the battery pack will directly lead to shortened battery life and increased unsafety. Therefore, it is necessary to balance the battery pack in series. [0003] At present, there are two methods of balancing electric vehicle lit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H01M10/44H01M10/42
CPCY02E60/10
Inventor 朱国荣马燕徐小薇何少佳张东华陈伟邱实刘芙蓉
Owner 理工大高新技术研究院(高邮)有限公司
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