Pole piece structure of lithium battery and polymer soft package lithium battery

A lithium battery and pole piece technology, applied in the field of pole piece structure and polymer soft-pack lithium battery, can solve problems such as low rate performance, and achieve the effect of improving energy density, reducing internal resistance, and accelerating charge transfer speed

Pending Publication Date: 2022-05-20
江西浩然智能科技有限公司
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a pole piece structure of a lithium battery and a polymer soft-packed lithium battery to solve the technical problem of low rate performance of existing products

Method used

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  • Pole piece structure of lithium battery and polymer soft package lithium battery
  • Pole piece structure of lithium battery and polymer soft package lithium battery
  • Pole piece structure of lithium battery and polymer soft package lithium battery

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] refer to Figure 3 to Figure 4 , the present invention provides a pole sheet structure of a lithium battery, including a positive electrode sheet and a negative electrode sheet, the positive electrode sheet includes a positive electrode collector 12, the positive electrode collector 12 is coated with a positive electrode active material 11, and the negative electrode sheet includes a negative electrode collector 22. The negative electrode current collector 22 is coated with the negative electrode active material 21; the middle part of the positive electrode sheet is reserved for welding the ...

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Abstract

The invention relates to the technical field of lithium ion batteries, and discloses a pole piece structure of a lithium battery and a polymer soft package lithium battery in order to solve the technical problem that an existing product is low in rate capability, a pole piece comprises a positive pole piece and a negative pole piece, the pole piece is provided with a current collector, the current collector is coated with an active material, and the active material is a polymer soft package lithium battery. A gap for welding the drainage body is reserved in the middle of the pole piece, an active substance is vacant in the gap, and the drainage body is welded on the current collector in an ultrasonic manner. The head super-welding drainage bodies of the positive and negative pole pieces are changed into middle welding, the head and the tail are both active substances, compared with an existing structure, the covering area of the active substances can be increased, the internal resistance of the battery is reduced, the current density is increased, the charge transfer speed is increased, and therefore the energy density and the rate charge-discharge performance of the battery are improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a pole piece structure of a lithium battery and a polymer soft-pack lithium battery. Background technique [0002] With the rapid development of the lithium battery industry, the technology and product quality of polymer prismatic lithium-ion batteries are also improving day by day. Seeing that electronic communication equipment is becoming more and more high-end, it is accompanied by higher and farther requirements for built-in power, such as requirements for magnification, cycle life, safety performance, appearance, etc. And because the variety of electronic devices satisfies the matching degree between batteries and products, it also increases challenges to battery technology and production under the background of improving the performance of the battery itself. [0003] As the main components of lithium-ion batteries, the positive electrode and negative electro...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M50/536H01M10/052H01M10/0525
CPCH01M4/13H01M50/536H01M10/052H01M10/0525Y02P70/50
Inventor 黄春年彭舜王君虎刘亚明
Owner 江西浩然智能科技有限公司
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