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Battery core and method for manufacturing battery core, and lithium ion battery

A technology of battery winding and winding core, which is applied in the field of lithium-ion batteries. It can solve the problems of poor cylindricity of battery winding cores and difficulty in increasing the capacity of lithium-ion batteries, and achieve the effects of improving cylindricity, facilitating assembly, and increasing capacity.

Pending Publication Date: 2019-04-19
SHENZHEN ZHUONENG NEW ENERGY TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first object of the present invention is to provide a battery winding core, which aims to solve the problem that the capacity of lithium-ion batteries is difficult to increase due to the connection of the positive and negative tabs with the positive metal substrate and the negative metal substrate by welding in the prior art. Technical problem of poor cylindricity of winding core

Method used

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  • Battery core and method for manufacturing battery core, and lithium ion battery
  • Battery core and method for manufacturing battery core, and lithium ion battery
  • Battery core and method for manufacturing battery core, and lithium ion battery

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

[0046] It should also be...

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Abstract

The invention is applicable to the field of lithium ion batteries, and discloses a battery core and a method for manufacturing a battery core, and a lithium ion battery. The battery core comprises a core body having a hollow inner hole, and the core body comprises a first diaphragm, a negative electrode sheet, a second diaphragm and a positive electrode sheet. The positive electrode sheet comprises a positive electrode metal substrate, positive electrode ears and a positive electrode coating layer coating the positive electrode metal substrate. The negative electrode sheet comprises a negativeelectrode metal substrate, negative electrode ear and a negative electrode coating layer coating the negative electrode metal substrate. There are at least two positive electrode ears and negative electrode ears, and the positive electrode ears are located at the same side of the hollow inner hole in the radial direction of the core body, the negative electrode ears are located at the same side of the hollow inner hole in the radial direction of the core body, each positive electrode ear is integrated with the positive electrode metal substrate, and each negative ear is integrated with the negative electrode metal substrate. The coating areas of the coating layers on the pole sheets are added to improve the capacity of the lithium ion battery and improve the cylindricity of the battery core.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a battery core, a method for manufacturing the battery core and a lithium ion battery with the battery core. Background technique [0002] In the prior art, the positive and negative plates of lithium-ion batteries are first coated with a coating on the metal substrate, and then the tabs are welded. The lithium-ion batteries manufactured by this process will have the following problems: [0003] 1) When applying the coating, it is necessary to reserve a blank area on the metal substrate for tab welding, thereby reducing the area where the active material can be coated, thereby affecting the improvement of the capacity of the lithium-ion battery. [0004] 2) The part where the tab is welded on the pole piece is thicker than other parts. After winding to form the battery core, the part corresponding to the tab is thicker, which will affect the overall size and cylindricity of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M10/0587H01M10/0525H01M50/538
CPCH01M10/0525H01M10/0587H01M50/538Y02E60/10Y02P70/50
Inventor 王保黄国文朱燕飞
Owner SHENZHEN ZHUONENG NEW ENERGY TECH
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