a cell

Abstract

The invention discloses an electric core. The electric core includes: a first pole piece, a second pole piece, an isolation film and a first fixing piece. The isolation film includes a first end, a second end, and a third end. One end, the second end and the third end respectively exceed the first pole piece, and the second end is arranged between the first end and the third end; the first fixing member fixes the first end, the second end and third end. Therefore, through the cooperation of the first pole piece, the second pole piece, the separator and the first fixing piece, it is possible to prevent the separator from shrinking and wrinkling when the cell falls, and it can ensure that the separator effectively connects the first pole piece and the second pole piece. It can effectively avoid the risks of short circuit and voltage drop caused by isolation shrinkage when the battery core is dropped, thereby improving the use safety and life of the battery core, and the structure and process of the battery core are simple, which can make production and Manufacturing is more convenient, thereby reducing manufacturing costs.

Description

technical field [0001] The invention relates to the field of electrochemical technology, in particular to an electric core. Background technique [0002] In order to meet the requirements of high energy density and long service life of lithium-ion batteries for electronic mobile devices, the separator in the battery structure is getting thinner and the electrolyte is getting more and more; during the use of the battery, there may be drops and vibrations, etc. Mechanical abuse, the two sides of the soft separator will be subjected to the friction of the positive electrode and the negative electrode and the impact of the electrolyte, which will cause the separator to shrink and wrinkle and cannot effectively isolate the positive and negative electrodes. This will lead to internal short circuit of the battery and cause safety hazards of heating and fire. Therefore, effectively restraining the end of the separator is an effective strategy to improve the drop performance of lithi...

AI Technical Summary

Problems solved by technology

[0002] In order to meet the requirements of high energy density and long service life of lithium-ion batteries for electronic mobile devices, the separator in the battery structure is getting thinner and the electrolyte is getting more and more; during the use of the battery, there may be drops and vibrations, etc. Mechanical abuse, the two sides of the soft separator will be subjected to the friction of the positive electrode and the negative electrode and the impact of the electrolyte, which will cause the separator to shrink and wrinkle and cannot effectively isolate the positive and negative electrodes. It will lead to internal short circuit of the battery and cause safety hazards of heating and fire. Therefore, effectively restraining the end of the separator is an effective strategy to improve the drop performance of lithium batteries.

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