Battery pack self-discharge detection method, battery pack controller and system

A battery pack, self-discharge technology, applied in the direction of instruments, measuring electricity, measuring devices, etc., can solve the problems of short circuit of positive and negative poles of single cells, increased self-discharge of battery cells, explosion of battery packs, etc., to ensure work safety. Effect

Active Publication Date: 2016-04-27
幂源(合肥)动力技术有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

Although lithium batteries have no memory effect during charge and discharge cycles, iron particles may be mixed in the positive electrode material during the manufacturing process of lithium batteries.
During the charging and discharging process, iron particles and impurities may pierce the diaphragm and cause a short circuit between the positive and negative poles of the monomer, which will cause the self-discharge of the battery monomer to increase and the voltage will decrease. If the charging and discharging are not stopped in time, the battery pack may explode and catch fire, causing personal injury. or property damage

Method used

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  • Battery pack self-discharge detection method, battery pack controller and system
  • Battery pack self-discharge detection method, battery pack controller and system
  • Battery pack self-discharge detection method, battery pack controller and system

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0045] It should be noted that like numerals and let...

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Abstract

Embodiments of the invention provide a battery pack self-discharge detection method, which is used for detecting self-discharge of a battery pack which is composed of a plurality of single battery bodies. The battery pack self-discharge detection method comprises the steps of: respectively detecting a voltage of each of the single battery bodies when the battery pack satisfies a first condition, wherein the voltage of each single battery body serves as a first reference voltage of each single battery body; respectively detecting a voltage of each of the single battery bodies when the battery pack satisfies a second condition, and the voltage of each single battery body serves as a second reference voltage of each single battery body; and determining that a self-discharge failure occurs in the single battery body corresponding to a first detection result when the first detection result obtained through calculation is greater than a first preset value. The battery pack self-discharge detection method can ensure that a faulty single battery body can be determined as soon as possible when the self-discharge failure of the battery occurs, thereby ensuring operation safety of the entire battery pack.

Description

technical field [0001] The invention relates to the field of battery detection, in particular to a battery pack self-discharge detection method, a battery pack controller and a system. Background technique [0002] Due to the advantages of low environmental pollution, no noise, and high energy, lithium batteries have been widely used as power sources in new energy vehicles. The power energy of new energy vehicles is composed of multiple battery cells connected in series and parallel to form a large-capacity battery pack. Although lithium batteries have no memory effect during charge and discharge cycles, iron particle impurities may be mixed in the cathode material of lithium batteries during the manufacturing process. During the charging and discharging process, iron particles and impurities may pierce the diaphragm and cause a short circuit between the positive and negative poles of the monomer, which will cause the self-discharge of the battery monomer to increase and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/396
Inventor 王保全黄秋桦王昌友周鹏
Owner 幂源(合肥)动力技术有限公司
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