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Method for measuring lithium battery interior gas amount

A technology of internal gas and gas volume, applied in the direction of volume measuring instruments/methods, measuring capacity, measuring devices, etc., can solve problems such as difficulty in lithium battery measurement, and achieve the effect of fast method

Inactive Publication Date: 2011-07-13
SHANGHAI BYD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the difficulty of measuring the gas volume inside the lithium battery and provide a convenient method for measuring the gas volume inside the lithium battery

Method used

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  • Method for measuring lithium battery interior gas amount
  • Method for measuring lithium battery interior gas amount
  • Method for measuring lithium battery interior gas amount

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0050] (a). Internal pressure measurement of empty case battery:

[0051] First select five LP053450 square battery shells, which are welded with special cover plates with air holes. Such as figure 1, take an empty shell battery 3 and inflate it with an inflatable pressure measuring system 2 (produced by Shanghai Shenzhi, SWP-LCD8101 / T20X digital pressure gauge), the battery shell will expand, and record the internal pressure of the battery shell at the same time, And use the thickness gauge 1 to test and record the value of the corresponding empty case battery thickness. Adjust the air flow, and record a series of pressure-thickness values ​​(at least three sets of data). Several sets of measured values ​​were fitted in the drawing software to obtain the fitting curve and equation of the internal pressure-thickness relationship of the LP053450 square battery. For the internal pressure-thickness fitting curve of the empty shell battery, please refer to the attached drawing ...

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Abstract

The invention provides a method for measuring lithium battery interior gas amount. The method includes carrying out the following tests direct to one battery model: A, testing sample battery, the sample battery is aerated and interior pressure thereof is tested, the thickness of the sample battery is tested, and then volume of the sample battery is tested, and gas amount-thickness relation equation of battery to be tested is obtained by calculation; B, testing the battery to be tested, the thickness of battery to be tested is tested, and the interior gas amount of the battery to be tested is obtained by calculation according to gas amount-thickness relation equation of battery to be tested obtained by the step A. Battery interior gas amount is simple and rapid to test by using the method provided by the invention without damaging battery system or influencing next research on battery.

Description

technical field [0001] The invention relates to a method for measuring the performance of a lithium battery, in particular to a method for measuring the gas volume inside the lithium battery. Background technique [0002] At present, secondary batteries represented by lithium-ion batteries are new types of batteries with high energy density, and have increasingly become important and indispensable power accessories for communication products such as mobile phones, mobile DVDs, and handheld computers. The casings of lithium-ion batteries on the market are generally cylindrical or square, and the casings are generally formed of aluminum or steel sheet metal. [0003] The outside of the lithium-ion battery is shaped and protected by the case, and its core is formed by the interaction of the dry electrode core and the electrolyte. Whether it is in the production or subsequent use of lithium-ion batteries, a series of electrochemical reactions will produce a large amount of gas....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F22/00
Inventor 邢海霞渠冰陈洪亮边玉珍邓丙琪
Owner SHANGHAI BYD
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