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Gluing structure battery cell with embedded tab, fabrication method of gluing structure battery cell and lithium battery

A built-in, tab technology, used in non-aqueous electrolyte batteries, electrolyte battery manufacturing, electrode manufacturing, etc., can solve the problems of stack-type batteries prone to dislocation, low battery mass energy density, limiting battery power, etc. The effect of improving hardness and overall anti-vibration ability, reducing safety hazards and improving utilization rate

Inactive Publication Date: 2019-06-14
湖北锂诺新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the structural reasons, the mass energy density of the battery is relatively low. The laminated battery is prone to misalignment after the pole pieces are stacked, and the stability is poor, which often causes a short circuit, which leads to more serious accidents, which is limited to a certain extent. Improved battery power

Method used

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  • Gluing structure battery cell with embedded tab, fabrication method of gluing structure battery cell and lithium battery
  • Gluing structure battery cell with embedded tab, fabrication method of gluing structure battery cell and lithium battery
  • Gluing structure battery cell with embedded tab, fabrication method of gluing structure battery cell and lithium battery

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preparation example Construction

[0052] The invention discloses a method for preparing an adhesive structure electric core with embedded tabs, which comprises the following preparation steps:

[0053] 1) Metal foil surface coating: coat the metal foil surface and reserve a blank area as the positive electrode tab 1.1 or the negative electrode tab 2.1; the specific coating method is as follows figure 1 As shown, the uncoated blank area in the figure is used as the positive electrode tab 1.1 or the negative electrode tab 2.1. In this application, the current collector is almost completely coated, and only the tabs are reserved in the middle without coating. It is beneficial to reduce the waste of raw materials and reduce production costs; at the same time, different from the way in which the positive pole or negative pole protrudes out of the pole piece in the prior art, this application chooses this embedded method, which is conducive to ensuring the battery cell The mass energy density is higher.

[0054] 2)...

Embodiment 1

[0062] According to the above preparation method, a laminated battery is prepared, wherein the size of the positive pole piece 1 and the negative pole piece 2 is length×width=180mm×169mm, and the size of the positive pole tab 1.1 and the negative pole tab 2.1 is length×width=40mm× 25mm, the material of the adhesive layer is acrylic, and the material of the metal conductive adhesive is a mixture of epoxy resin and metal nickel.

Embodiment 2

[0064] The material selected in this embodiment, the size of the pole pieces, and the size of the tabs are exactly the same as those in Comparative Document 1, but the wound lithium-ion batteries are prepared, such as Figure 10 As shown, after the process of hot-pressed cell, tab welding, mylar film coating, cell insertion into the shell, shell cover sealing welding, baking, liquid injection, and chemical formation, the wound-type ternary lithium battery is produced.

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Abstract

The invention discloses a gluing structure battery cell with an embedded tab, a fabrication method of the gluing structure battery cell and a lithium battery, and belongs to the technical field of lithium batteries. The battery cell comprises a positive electrode plate, a negative electrode plate and a diaphragm and also comprises a positive electrode tab and a negative electrode tab, wherein thediaphragm is arranged between the positive electrode plate and the negative electrode plate, the positive electrode tab is arranged on each positive electrode plate, the negative electrode tab is arranged on each negative electrode plate, a tail-end edge of the positive electrode tab, a tail-end edge of the negative electrode tab and tail ends of the electrode plate are maintained at the same horizontal surface, one of the tabs in the positive electrode tabs is connected with a first nickel sheet, one of the tabs in the negative electrode tabs is connected with a second nickel sheet, and the first nickel sheet and the second nickel sheet extend out of the edges of the electrode plates and are used for leading out the tabs. By the battery cell, the mass energy density of the battery can beeffectively improved, moreover, malposition and loosening of the positive electrode plate and the negative electrode plate also can be effectively prevented, the contact between the electrode plates is improved, and the stability and the safety of the battery are favorably improved.

Description

technical field [0001] The invention relates to a laminated battery cell, which belongs to the technical field of lithium batteries, in particular to an adhesive structure battery cell with embedded tabs, a preparation method thereof and a lithium battery. Background technique [0002] Lithium-ion batteries have the characteristics of high energy density, high average open circuit voltage and long cycle life, and have been widely used in mobile power supplies, portable appliances and new energy vehicles. Lithium-ion batteries are mainly composed of positive electrode materials, negative electrode materials, electrolyte, separator and other auxiliary materials. The specific capacity of positive and negative electrode materials directly determines the energy density of the battery. [0003] Most of the existing lithium-ion batteries are made by winding or stacking positive and negative pole pieces and diaphragms. There is an insulating diaphragm or an insulating coating layer ...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01M2/22H01M10/058H01M10/0525H01M4/139H01M4/04H01M50/528
CPCY02E60/10Y02P70/50
Inventor 马卫陈刚张天赐杨梢孙伟兵
Owner 湖北锂诺新能源科技有限公司
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