Structure and manufacturing method of a soft package battery

Abstract

The invention provides a structure of a soft-packed battery, which can solve the problems of the existing soft-packed battery that the performance of the soft-packed battery is affected due to the large internal resistance, large calorific value and power loss due to the welded connection between the tab and the battery electrode sheet, including Several positive electrode sheets and several negative electrode sheets wrapped in a packaging shell, the positive electrode sheets and negative electrode sheets are separated by a separator, the packaging shell is filled with electrolyte, and the positive electrode sheets are positive electrode substrates coated with positive electrode materials , the negative electrode sheet is a negative electrode substrate coated with negative electrode materials, the positive electrode substrate is provided with a positive electrode lead end, the negative electrode base material has a negative electrode lead end, and it is characterized in that: the positive electrode lead end extends out of the packaging shell to form As for the positive tab, the lead-out end of the negative electrode extends out of the packaging shell to form the negative tab, and also provides a manufacturing method for the soft-packaged battery.

Description

technical field [0001] The invention relates to the technical field of flexible packaging batteries, in particular to a structure and a manufacturing method of a flexible packaging battery. Background technique [0002] The outer casing of the soft-packed battery is a relatively soft aluminum-plastic composite film. To obtain a large-capacity battery, many positive and negative electrodes are usually separated by a separator and stacked in the packaging shell, filled with electrolyte to form a battery, and the positive terminal of the positive electrode is welded on the Together, the negative lead-out ends of the positive plates are welded together, and then a positive pole lug and a negative pole lug are welded on the positive pole lead-out end and the negative pole lead-out end respectively. [0003] In such a flexible package battery structure, since the tabs are welded on later, the internal resistance of the tabs is relatively large, and it is easy to generate heat. Th...

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Problems solved by technology

[0004] In view of the above problems, the present invention provides a flexible package battery structure, which can solve the problems of the existing flexible package battery that the performance of the flexible package battery is affected due to the large internal resistance, large heat generation and power loss due to the welding connection of the tabs and the battery electrodes. question

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