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Passive equalization failure detection circuit

A technology of equalization circuit and detection circuit, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as affecting the consistency of batteries

Active Publication Date: 2021-04-27
SHENZHEN ZHONGDIAN INT INFORMATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a passive equalization failure detection circuit for the problem that the failure of the equalization circuit will affect the consistency of the battery

Method used

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Embodiment Construction

[0018] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0019] see figure 1 , a voltage failure detection circuit, including an equalization circuit module 100 and an acquisition drive module 200, the equalization circuit module 100 includes a plurality of equalization circuit units, and one end of each equalization circuit unit is connected to the acquisition drive module 200, and the other end is respectively connected by multiple The corresponding energy storage element in the energy storage module compos...

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Abstract

The invention discloses a passive equalization failure detection circuit, comprising an equalization circuit module and a collection and drive module. The equalization circuit module includes a plurality of equalization circuit units. One end of each equalization circuit unit is connected to the collection and drive module, and the other end is connected to a plurality of The corresponding energy storage element in the energy storage module composed of energy storage elements connected in series, the equalization circuit unit is used to collect the output voltage of the corresponding energy storage element and send it to the acquisition drive module; the acquisition drive module is used to control the on-off state of the equalization circuit unit, And according to the output voltage sent by the equalizing circuit unit and the on-off state of the equalizing circuit unit, it is judged whether the circuit fails. The above passive equalization failure detection circuit can detect whether the equalization circuit fails while equalizing the energy storage elements, thereby avoiding the problem that the failure of the equalization circuit affects the consistency of the energy storage elements.

Description

technical field [0001] The invention relates to the technical field of energy storage element management systems, in particular to a passive equalization failure detection circuit. Background technique [0002] With the rapid development of science and technology, lithium batteries with high energy density and pollution-free are more and more widely used. However, due to the very large power demand, a single lithium battery cannot meet people's needs. Therefore, a multi-string lithium battery pack composed of multiple single cells in series has appeared. Due to the limitations of the manufacturing process, the individual cells in the same lithium battery pack will have unbalanced capacity during the actual charge and discharge process, and the single cell will be overcharged or overdischarged, which will damage the lithium battery. , reducing the service life of the lithium battery. [0003] The traditional balance circuit is to connect a balance circuit composed of a high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/396
CPCG01R31/3644G01R31/396
Inventor 张文忠胥正伟
Owner SHENZHEN ZHONGDIAN INT INFORMATION TECH CO LTD
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