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Electrode group structure of winding type accumulator

A technology for electrode groups and storage batteries, which is applied in the manufacture of battery electrodes, structural parts, and secondary batteries. It can solve the problems of prismatic shape, poor electrode winding performance, and lower battery assembly yield, so as to reduce short-circuit or micro-short hazards. , It is not easy to break, and the effect of improving the pass rate

Inactive Publication Date: 2006-07-12
BAILE ELECTROTHERMIC ELECTRIC APPLIANCE JIANGSU
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Problems solved by technology

[0002] The development of the electronics industry has higher and higher requirements for the energy density of the battery. It is necessary to make a high-capacity battery and require more active materials to be filled in the same volume. This requires the production of high-density electrodes, but high-density electrode winding Poor performance, the winding radius of the electrode at the winding core position is small, and it is prone to breakage, prismatic, short circuit and other phenomena when winding into an electrode group, which reduces the battery assembly yield

Method used

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  • Electrode group structure of winding type accumulator
  • Electrode group structure of winding type accumulator

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Embodiment Construction

[0012] Referring to the accompanying drawings, an electrode group structure of a winding battery is composed of a positive electrode 1, a negative electrode 2 and a separator between the two electrodes. The density or thickness of the electrode group is different in the winding direction. The electrode group roll The density of the core portion is low or the thickness is thin.

[0013] In the electrode group, the density or thickness of the positive electrode 1 in the winding direction may be different, and the density or thickness of the winding core of the positive electrode 1 is low; it may also be that the density or thickness of the negative electrode 2 in the winding direction is different, and the negative electrode 2 The density of the winding core is low or the thickness is thin; or the density of the positive electrode 1 and the negative electrode 2 is low or the thickness of the winding core is low.

[0014] In the present invention, the density of the electrode gro...

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Abstract

The invention discloses an electrode group structure of winding accumulator, which comprises an anode (1), a cathode (2), and insulator between two electrodes. The density or thickness of electrode along winding is different, such as the winding core has low density or thin thickness. As hard to fracture during winding, this invention can wind the electrode group more tightly to reduce hidden danger of short circuit or micro short circuit, and improves up-to-standard rate or product.

Description

technical field [0001] The invention relates to an electrode group structure of a winding storage battery. Background technique [0002] The development of the electronics industry has higher and higher requirements for the energy density of the battery. It is necessary to make a high-capacity battery and require more active materials to be filled in the same volume. This requires the production of high-density electrodes, but high-density electrode winding Poor performance, the winding radius of the electrode at the winding core position is small, and it is prone to breakage, prismatic, short circuit and other phenomena when winding into an electrode group, which reduces the battery assembly yield. Contents of the invention [0003] The invention provides an electrode group structure of a wound storage battery. The winding core of the electrode group is thin in thickness and good in flexibility, and is not easily broken during winding, thereby improving the yield of batte...

Claims

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Application Information

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IPC IPC(8): H01M4/00H01M10/04
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 李相哲邢志勇潘宏斌匡德志李瑾荣蓉苏芳
Owner BAILE ELECTROTHERMIC ELECTRIC APPLIANCE JIANGSU
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