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A lithium ion battery separator with a composite cell

A lithium-ion battery, cell technology, applied in battery pack components, separators/films/diaphragms/spacers, circuits, etc., can solve the problem of poor thermal insulation performance of battery separators, separator toughness and stab resistance Insufficient wearability, decreased battery discharge capacity, etc., to achieve the effect of outstanding thermal insulation performance, increased toughness, and improved service life

Pending Publication Date: 2019-01-04
南京世界村汽车动力有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] The thermal insulation and sealing performance of the existing battery separator is not very good. If the battery is used for a long time, the thermal insulation and sealing performance will be reduced, resulting in a decrease in battery safety, and the toughness and puncture resistance of the existing separator are not strong. In addition, the existing The diaphragm is not completely soaked by the electrolyte, resulting in a decrease in the battery's discharge capacity

Method used

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  • A lithium ion battery separator with a composite cell
  • A lithium ion battery separator with a composite cell
  • A lithium ion battery separator with a composite cell

Examples

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Embodiment Construction

[0017] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the examples, which are only used to explain the present invention, and do not constitute a limitation to the protection scope of the present invention.

[0018] according to Figure 1-5 The lithium-ion battery separator of a composite cell shown includes a polyolefin layer 1, and the number of polyolefin layers 1 is two, and one side of the polyolefin layer 1 is bonded with an electrolyte storage layer 2, and the top of the electrolyte storage layer 2 is and the bottom are bonded with a polyolefin layer 1. The cross section of the polyolefin layer 1 is rectangular, and the cross section of the electrolyte storage layer 2 is also rectangular, and the side length of the polyolefin layer 1 is 1.0 times the side length of the electrolyte storage layer 2. The width of the olefin layer 1 is 1.0 times the side width of the electrolyte storag...

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Abstract

The invention provides a lithium ion battery separator of a composite cell, include a polyolefin layer, the number of the polyolefin layers is two, At one side of that polyolefin lay, an electrolyte storage layer is bon, A top and a bottom of that electrolyte storage lay are adhered with a polyolefin lay, As that cross section of the polyolefin lay is rectangular, the cross section of the electrolyte storage layer is also rectangular, the side length of the polyolefin lay is 1.0 times as long as the side length of the electrolyte storage layer, and the polyolefin layer widen is 1.0 times as wide as the side width of the electrolyte storage layer, in summary, the invention improves the service life of the battery and enhances the safety of the battery.

Description

technical field [0001] The invention relates to the technical field of new batteries, in particular to a lithium-ion battery diaphragm of a composite battery cell. Background technique [0002] In the structure of lithium batteries, the separator is one of the key inner components. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle and safety performance of the battery. A separator with excellent performance plays an important role in improving the overall performance of the battery. The main function of the diaphragm is to separate the positive and negative electrodes of the battery, prevent the two electrodes from contacting and short circuit, and also have the function of allowing electrolyte ions to pass through. The separator material is non-conductive, and its physical and chemical properties have a great influence on the performance of the battery. [0003] The therma...

Claims

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Application Information

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IPC IPC(8): H01M2/18H01M2/16H01M50/40H01M50/417
CPCH01M50/463H01M50/411Y02E60/10
Inventor 芮忠南李健孙兰娟
Owner 南京世界村汽车动力有限公司
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