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System and method for determining insulation resistance of battery pack

A technology of isolation resistance and battery pack, which is used in high resistance measurement, measurement of resistance/reactance/impedance, measurement of electricity, etc., and can solve the problems of variation of isolation resistance measurement value, large isolation resistance time and cost, etc.

Active Publication Date: 2016-03-30
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, according to the prior art, the battery must be fully charged to measure the isolation resistance; accordingly, there are some problems that the time and cost for measuring the isolation resistance are enormous and the measured value of the isolation resistance varies depending on the degree of charging

Method used

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  • System and method for determining insulation resistance of battery pack
  • System and method for determining insulation resistance of battery pack
  • System and method for determining insulation resistance of battery pack

Examples

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Embodiment Construction

[0021] refer to figure 1 , a system 10 for determining the isolation resistance of a battery pack 20 according to an exemplary embodiment is provided. System 10 includes voltage source 40 , voltmeter 50 , microprocessor 60 , electrical switches 70 , 72 , 74 , 76 , 78 , 80 , 82 , resistor 90 , and memory device 93 . One advantage of system 10 is that, in determining the associated isolation resistance of battery pack 20 , system 10 utilizes voltage source 40 that repeatedly supplies battery pack 20 with a predetermined voltage. Another advantage of system 10 is that battery pack 20 does not need to be fully charged in order to determine the isolation resistance of battery pack 20 .

[0022] The battery pack 20 is provided for generating electric power for an electric vehicle or a hybrid electric vehicle. Battery pack 20 includes housing 95 , battery modules 100 , 110 , electrical switch 82 , first electrical terminal 120 , and second electrical terminal 130 . The housing 95 ...

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Abstract

An insulation resistance measurement system of a battery pack comprises a voltage source, a voltage meter, and a microprocessor. The voltage source is located outside the battery pack. The voltage source applies an output voltage to a first electric terminal and a second electric terminal. The voltage meter measures a first voltage level between the first electric terminal and a housing, and measures a second voltage level between the first electric terminal and the housing when resistance is electrically connected between the first electric terminal and the housing. The voltage meter measures a third voltage level between the second electric terminal and the housing, and measures a fourth voltage level between the second electric terminal and the housing when resistance is electrically connected between the second electric terminal and the housing. The microprocessor determines first insulation resistance on the basis of the first voltage level, the second voltage level, and the third voltage level.

Description

Background technique [0001] As the technology of mobile devices continues to develop and requirements therefor increase, the requirements for secondary batteries as energy sources are rapidly increasing. Accordingly, various studies on batteries capable of satisfying various needs have been underway. [0002] According to the shape of the battery case, such a secondary battery is classified into a cylindrical battery or a rectangular battery whose electrode assembly is contained in a cylindrical or rectangular metal can, and a bag whose electrode assembly is contained in a pouch made of aluminum laminate pouch-type battery in a case. [0003] Recently, demands for rectangular batteries and pouch-type batteries whose thickness is thin are increasing; in particular, interest in pouch-type batteries having an easily deformable form, low manufacturing cost, and light weight is high. [0004] A pouch-type battery is a battery in which an electrode assembly having an anode / separat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R27/00
CPCG01R27/14G01R27/025G01R31/385G01R31/389
Inventor 格雷格·布博
Owner LG ENERGY SOLUTION LTD
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