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Electric core structure of lithium battery

A lithium battery and cell technology, applied in structural parts, secondary batteries, battery pack parts, etc., can solve problems such as active material shedding, electrode plate breakage, lithium battery short circuit, etc., to reduce breakage, improve capacity, increase The effect of the radius of curvature

Inactive Publication Date: 2010-09-15
SHANGHAI KENEDE BATTERY
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  • Abstract
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Problems solved by technology

[0004] The present invention solves the problem that in the prior art, during the processing of laminated lithium battery cells, burrs are easily generated to cause short circuit of the lithium battery, and the high curvature of the wound lithium battery cells easily causes the plate to break and the active material to fall off. and other problems, by using the positive plate and negative plate packaged in a diaphragm bag to be stacked layer by layer, and further used as the core structure of the inner core of the wound lithium battery cell, the short circuit problem caused by the burr is solved, and the high curvature is reduced. The technical problems of battery plate breakage and active material falling off, and at the same time improve the capacity of lithium batteries

Method used

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  • Electric core structure of lithium battery
  • Electric core structure of lithium battery
  • Electric core structure of lithium battery

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Such as figure 1 As shown, the positive electrode sheet 1 is inserted into the diaphragm bag 2, and the periphery of the diaphragm bag is sealed by thermal melting, leaving the position of the positive lead-out sheet 3 unsealed, thus forming the positive electrode plate packaged in the diaphragm bag. Such as figure 2 As shown, the positive electrode material is adhered to both sides of the positive electrode current collector to form a positive electrode plate 1, and the periphery of the positive electrode plate 1 is completely wrapped by a separator bag 2 except for the positive electrode lead-out piece 3, forming a layer of positive electrode layer of the inner core of the battery. Such as image 3 As shown, the positive electrode plate 1 and the negative electrode plate 4 packaged in the separator bag 2 are stacked in sequence, wherein the positive electro...

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Abstract

The invention discloses an electric core structure of a lithium battery. An electric core is positioned inside a cell cartridge, is connected with leading-out terminals of an anode and a cathode of the cell cartridge respectively through conducting connecting pieces, and comprises a battery inner core and a battery outer core, wherein the battery inner core is formed by laminating at least one layer of positive plate encapsulated by a membrane bag and at least one layer of negative plate in turn; and the battery outer core is formed by laminating a positive plate, a membrane and a negative plate in turn, is coiled to be vortex-shaped, and is wrapped on the battery inner core.

Description

technical field [0001] The invention relates to a lithium battery, in particular to a battery cell structure of the lithium battery. Background technique [0002] In recent years, with the rapid development of electric tools, electric toys, electric bicycles, hybrid vehicles, etc., higher and higher requirements have been put forward for the high-power discharge capacity of batteries. Due to the advantages of good high-power working performance, high energy density and lightness, power lithium-ion batteries are gradually being applied to the above fields. [0003] At present, the electrode cores of lithium batteries are mainly composed of two main methods: laminated and wound. Among them, the stacked type has the advantages of uniform current collection effect, high automation level, easy to achieve thick positive plate or negative plate, which is conducive to reducing costs; but the stacked lithium battery has higher requirements on the accuracy of processing equipment, es...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/38H01M2/26H01M50/531
CPCY02E60/10Y02P70/50
Inventor 刘宏兵夏敏范少明
Owner SHANGHAI KENEDE BATTERY
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