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Passive equalization circuit for battery management system

A battery management system, passive equalization technology, applied in the direction of circuit, secondary battery, secondary battery repair/maintenance, etc., can solve the problems of battery over-discharge damage, unable to balance function closed-loop control, etc., to achieve the effect of avoiding over-discharge damage

Inactive Publication Date: 2016-06-01
深圳市清友能源技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a passive equalization circuit of the battery management system, which aims to solve the problem that the prior art cannot realize closed-loop control on the equalization function. Will cause irreversible over-discharge damage to the battery

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  • Passive equalization circuit for battery management system
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Embodiment Construction

[0026] 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.

[0027] Such as figure 1 As shown, a passive equalization circuit of a battery management system provided by an embodiment of the present invention includes a central control unit 1, a plurality of voltage acquisition units 2 and a plurality of electronic switch units 3 respectively connected to the central control unit 1;

[0028] A plurality of voltage acquisition units 2 are connected to the single cells 4 of the on-board battery pack in one-to-one correspondence, and each voltage acquisition unit 2 is used to collect the voltage information of the corresponding single cells and transmit it to th...

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Abstract

The invention is applicable to battery management, and provides a passive equalization circuit for a battery management system. The passive equalization circuit comprises a central control unit, multiple voltage collection units and multiple electronic switch units, wherein the voltage collection units are used for collecting voltage information of single batteries and transmitting the voltage information to the central control unit; the central control unit analyzes according to the voltage information, and generates a discharge instruction to control the electronic switch units to discharge to the single batteries when the voltage of a certain single battery is higher than that of other single batteries, and stops the discharging process when the voltage of the certain single battery is consistent with that of other single batteries. By adoption of the passive equalization circuit, the voltage information of single batteries can be monitored in real time; discharging processing can be performed when a certain single battery is abnormal so as to enable the voltages of all the single batteries to be consistent; and furthermore, the real-time monitoring diagnostic function of the electronic switches is utilized, so that damaged switching devices can be found in time to send out an alarm so as to avoid overdischarge damage of batteries.

Description

technical field [0001] The invention belongs to the field of battery management, in particular to a passive equalization circuit of an electric vehicle battery management system. Background technique [0002] With the global energy shortage and air pollution becoming more and more serious, in order to deal with this problem, developed countries are actively adjusting their industrial structure. Electric vehicles, as an important field of economic stimulation in developed countries and emerging countries, have received great attention from the governments of relevant countries. [0003] Lithium batteries are widely used as power batteries in the electric vehicle industry. Lithium batteries have high energy density, but their chemical properties are lively, which is different from traditional lead-acid batteries. The battery management system must be used to monitor and protect it in real time. Due to the differences in the production process of each single lithium battery i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/48
CPCH01M10/425H01M10/48H01M10/488Y02E60/10
Inventor 朱靖
Owner 深圳市清友能源技术有限公司
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