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Lithium metal battery

A metal lithium and battery technology, which is applied in the field of metal lithium batteries, can solve the problems of reducing battery capacity, reducing the utilization rate of negative electrode active materials, etc., and achieves the effect of increasing the reaction area, high electrical effect and heat dissipation effect, and reducing heat generation.

Active Publication Date: 2021-11-09
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current collector part covered on the negative electrode sheet will prevent the electrolyte from reacting with the active material on the covered negative electrode sheet, thus reducing the utilization rate of the negative electrode active material and reducing the capacity of the battery.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0054] see figure 2 , is a schematic diagram of a partial structure of a metal lithium battery according to Example 1 of the present invention, the current collector 112a includes two current collectors 113a, and the two current collectors 113a are located on the opposite side edges of the negative electrode tab 200a In this way, the distance between the two current collectors 113a can be maximized, and the heat generation is at the intersection of the current collectors 113a, lithium pole pieces 111a and negative electrode tabs 200a, so that the two current collectors The fluid 113a is located at the opposite side edges of the negative tab 200a, thereby maximizing the distance between the two heat sources, effectively reducing local overheating, and improving battery safety and electrical performance.

[0055] Further, the two current collectors are arranged symmetrically with respect to the central axis of the lithium pole piece, so that the transfer path of the charge of t...

Embodiment 2

[0061] see image 3 , is a schematic diagram of a partial structure of a metal lithium battery in Example 2 of the present invention, the lithium pole piece 111b has a long side and a short side, and each of the current collectors 113b is electrically connected to the long side of the lithium pole piece 111b, respectively, The distance between the current collector 113b and the active material on the lithium pole piece 111b can be reduced, so that the active material of the lithium pole piece 111b can be fully utilized, the utilization rate of the negative electrode active material is improved, the battery capacity is improved, and the charge of the battery The transmission path is more reasonable, which can reduce the internal resistance of the battery and reduce the heating problem.

Embodiment 3

[0063] see Figure 4 , is a schematic diagram of a partial structure of a metal lithium battery according to Example 3 of the present invention, the current collector 112c includes two current collectors 113c, and the two current collectors 113c are located on the opposite side edges of the negative electrode tab 200c The current collector 112c includes an angled piece 114c and a main piece 115c, and the angled piece 114c is connected to the main piece 115c. In actual processing, the angled piece 114c and the main piece 115c are integrally formed; the two current collectors 112c, the extension direction of the angled piece 114c forms an included angle, and the degree of the included angle is between 0 degrees and 180 degrees. In this way, the distance between the two positions that generate heat sources can be further increased, and the heat can be more effectively alleviated. Local overheating problem, improve battery safety performance and electrical performance.

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Abstract

A metal lithium battery, the metal lithium battery includes a battery cell and a negative electrode tab, the battery cell includes a negative electrode sheet monomer, a positive electrode sheet monomer and a diaphragm sheet, and the negative electrode sheet monomer includes a lithium electrode sheet and the lithium electrode. A current collector that is electrically connected to the pole piece, the current collector includes a plurality of current collectors, and each current collector is electrically connected to the lithium pole piece. It can further make the cumulative area of ​​each current collector smaller than that of the traditional monolithic current collector, and the cumulative weight of each current collector is smaller than the weight of the traditional monolithic current collector, thereby further improving the negative electrode active material. utilization and increase battery capacity.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to metal lithium batteries. Background technique [0002] For metal lithium batteries, especially for laminated lithium batteries, the cells include a plurality of alternate and stacked pole pieces and multiple separators, that is, every two pole pieces sandwich a separator, wherein the pole piece includes a negative electrode The electrode sheet and the positive electrode sheet, through the contact of each electrode sheet with the electrolyte, complete the electrochemical reaction and realize the battery function. As for the prismatic winding battery, it includes a positive electrode sheet in the form of a belt, a negative electrode sheet and a separator between the two. [0003] For the negative pole piece, it will be connected to the negative pole tab through the whole piece of current collector, and the whole piece of current collector is connected to the negative pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0587H01M10/052H01M4/13
CPCH01M4/13H01M10/052H01M10/0587Y02E60/10Y02P70/50
Inventor 赖彩婷何兰星袁中直
Owner EVE ENERGY CO LTD
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