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On-line flexible package polymer lithium battery pack monitoring system and monitoring method thereof

A technology for monitoring systems and lithium battery packs, applied to secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve problems such as appearance deformation monitoring, and achieve the effects of improved service life, convenient operation, and simple structure

Inactive Publication Date: 2015-04-01
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the appearance deformation monitoring of polymer lithium battery packs on-line monitoring

Method used

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  • On-line flexible package polymer lithium battery pack monitoring system and monitoring method thereof
  • On-line flexible package polymer lithium battery pack monitoring system and monitoring method thereof

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Experimental program
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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] The online monitoring system for flexible packaging polymer lithium batteries of the present invention is mainly composed of a plurality of uniformly distributed resistance strain sensors 1 pasted on the surface of each lithium polymer battery, a temperature sensor 2 pasted on the central area of ​​each lithium battery surface, and a resistance strain sensor The sensor 1 and the temperature sensor 2 are respectively connected to a computer information processing unit 3. Such as figure 1 shown.

[0024] The resistance strain sensor 1 is a single-arm Wheatstone bridge circuit composed of resistance strain gauges and precision resistors. Its structural principle is as figure 2 shown. Among them, Rt is the working resistance strain gauge, R is the precision resistor with 1‰ precision, Ui is the supply voltage, and Uo is the output signa...

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Abstract

The invention relates to an on-line flexible package polymer lithium battery pack monitoring system which comprises a plurality of resistance strain sensors (1), temperature sensors (2) and a computer information processing unit (3), wherein the plurality of resistance strain sensors (1) are adhered to the surfaces of lithium batteries in a uniformly distributed way; the temperature sensors (2) are adhered to the central areas of the surfaces of the lithium batteries; and the computer information processing unit (3) is connected with the resistance strain sensors (1) and the temperature sensors (2) respectively. According to the on-line flexible package polymer lithium battery pack monitoring system, the computer information processing unit (3) judges the working state of a lithium battery pack by processing lithium battery deformation information acquired by the resistance strain sensors (1) and temperature information acquired by the temperature sensors (2), monitoring is kept on when the working state is normal, and alarming and treatment are carried out when the working state is abnormal.

Description

technical field [0001] The invention relates to an online monitoring system of a lithium battery pack and a monitoring method thereof. Background technique [0002] Known as the green chemical energy of the 21st century, the polymer lithium battery has a unit energy and capacity 2 to 3 times higher than that of a general lithium-ion battery. It has superior performance in charge and discharge characteristics, cycle life, and environmental protection. It is widely used in electric power Large-scale energy storage in the industry. However, the soft-packed polymer lithium battery wrapped with aluminum-plastic composite film is extremely vulnerable to damage during overcharge, overdischarge, deformation or corrosion, which has a great impact on the entire power system. There is an urgent need for a battery detection method to realize polymer lithium battery life. On-line monitoring of battery working status. [0003] At present, there are mainly the following types of battery ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/48
CPCH01M10/42H01M10/486H01M10/488Y02E60/10
Inventor 李士强刘国强夏慧
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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