Flexible package battery pole pack short-circuit detection method
A soft packaging battery and detection method technology, applied in the field of electrochemistry, can solve problems such as complicated methods, difficult operation, and high missed detection rate, and achieve the effect of strong tip discharge effect and high missed detection rate
Inactive Publication Date: 2018-09-07
TIANJIN LISHEN BATTERY
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the deficiencies of the above technologies, and provide a method for detecting the short circuit of the electrode group of the flexible package battery, aiming at solving the problem of high missed detection rate of the conventional method of detecting the short circuit of the electrode group without applying pressure, and the problem of applying a compressive force to the electrode group Conventional methods can only add force in one direction, and the method is complicated and difficult to operate
Method used
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Embodiment 1
[0029] See attached for details figure 1 , A method for detecting the short circuit of a flexible battery pack, including the following steps:
[0030] S101: encapsulate the top and side edges of the battery pole group that has been manufactured according to the battery manufacturing process;
[0031] S102: Vacuum and seal so that the inside of the battery that has been packaged in the previous step reaches a vacuum negative pressure;
[0032] In this step, a negative pressure vacuuming device is used. During detection, the battery packaged in step S101 is placed in the negative pressure cavity of the vacuuming device, and then the negative pressure vacuuming device is started to perform vacuuming, so that the internal generation of the battery reaches a certain vacuum degree;
[0033] S103: Use a short circuit tester to detect the short circuit of the pole group of the battery with the internal vacuum negative pressure, and pick out the unqualified battery.
[0034] After the short ci...
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The present invention relates to a flexible package battery pole pack short-circuit detection method. The method comprises the steps of: applying pressure to a battery at the internal portion in a vacuum negative pressure state through external atmospheric pressure to ensure tight contact of a positive plate, a separator and a negative plate at the internal portion of the battery, under the actionof the detection voltage of the detection device, the top discharge effect is higher caused by the internal impurities and defects of the battery, and pole pack short-circuit detection is performed under this pressure. The pressure is applied to the battery at the internal portion in the vacuum negative pressure state through the atmospheric pressure in the nature, and the pole pack short-circuitdetection is performed under this pressure so as to effectively detect an unqualified battery and solve the problems that a current pole package short-circuit detection method is high in loss detecting rate and a self-discharge battery cannot be timely discovered and cannot be timely subjected to feedback.
Description
Technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a method for detecting the short circuit of a soft package battery pole group. Background technique [0002] With the gradual increase in battery energy density requirements, the use of flexible packaging materials such as aluminum-plastic film has gradually been used as a battery shell in various battery fields due to its light weight, simple and mature processing technology. The battery capacity is getting higher and higher, the battery size is getting bigger and bigger, and the manufacturing process is getting more and more complicated. There are many problems that need to be solved urgently for short circuit detection of larger capacity batteries. [0003] At present, the commonly used method for testing the short circuit of the pole group is to complete the test before being packaged. The battery pole group is placed in a free state without compression force, and the in...
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IPC IPC(8): G01R31/36G01R31/02
CPCG01R31/50
Inventor 阳晓霞冯辉王玉龙段征杜建平
Owner TIANJIN LISHEN BATTERY