Structure of soft package battery and manufacturing method thereof

Abstract

The invention provides a structure of a soft package battery, and solves the problems that the welded connection of tabs and electrode slices in existing soft package batteries causes large internal resistance, large calorific value and electricity loss, and affects the performance of soft package batteries. The structure of the soft package battery comprises several positive plates and several negative plates wrapped in a pack shell, the positive plates and negative plates are separated by diaphragms, the pack shell is filled with an electrolyte solution, the positive plates are a positive material coated positive substrate, the negative plates are a negative material coated negative substrate, the positive substrate is provided with a positive leading-out end, and the negative substrate is provided with a negative leading-out end. The structure is characterized in that the pack shell extends out of the positive leading-out end to form a positive tab, and the pack shell extends out of the negative leading-out end to form a negative tab. The invention also provides a manufacturing method of the soft package 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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