High-current lithium manganese button battery and preparation method thereof

A button battery and high-current technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, batteries, etc., can solve the problems of easily piercing the diaphragm during the assembly process, difficulty in realizing automatic production, and increasing the battery volume of the battery, so as to achieve improvement Production efficiency, realization of automated production, and reduction in the number of creases

Pending Publication Date: 2018-08-28
YICHANG LIJIA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The folding method is complicated, and usually only manually operated in the drying room, the production efficiency is low, and it is difficult to realize automatic production;
[0006] (2) On the basis of the above process, if a current collecting net is added to the positive electrode material, one of the two surfaces of the positive electrode current collecting surface is completely exposed, and the corners of the pole piece are pro

Method used

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  • High-current lithium manganese button battery and preparation method thereof
  • High-current lithium manganese button battery and preparation method thereof
  • High-current lithium manganese button battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] see Figure 1-11, Embodiment 1 discloses a high-current lithium-manganese button battery, which includes a positive cover, a negative cover, and an electric core and an electrolyte in a sealed cavity formed between the positive cover and the negative cover. The positive electrode sheet, the separator 5 and the negative electrode sheet are stacked and then folded. Among them, the positive electrode sheet and the negative electrode sheet are folded to form a 2N-1 positive electrode sheet and a 2N-1 negative electrode sheet that cooperate with each other; the sub-positive electrode sheet and the sub-negative electrode sheet can be specifically rectangular sheets that cooperate with the sealed cavity. Among them, the positive electrode sheet is composed of aluminum expanded mesh 1 and manganese electrode material 2 rolled on the front and back sides of aluminum expanded mesh 1. The reverse side is N positive electrode sheets separated by creases, and the front is exposed by...

Embodiment 2

[0061] see Figure 1-13 , embodiment 2 provides the preparation method of aforementioned high-current lithium-manganese button cell, the method preparation comprises:

[0062] (1) The manganese electrode material obtained by the wet method is N-1: N pieces of positive pole pieces are rolled on the front and back sides of the aluminum mesh 1 with the corresponding length (plus the width of the corresponding crease) of the N pieces of positive pole pieces through a rolling machine Form a positive electrode sheet, print creases of a predetermined width on the corresponding position on the reverse side of the positive electrode sheet to divide it into N sub-positive electrode sheets at intervals, and expose the aluminum mesh 1 at one end of the positive electrode sheet (covering the manganese electrode material 2 at other positions) to form the positive electrode And N-1 pieces of continuous positive sub-sheets. Specifically, the positive electrode sheet can be sliced ​​from a la...

Embodiment 3

[0072] see Figure 1-5 , N in this embodiment is 3, the battery model is CR3832, the battery diameter is 37.97-38.00mm, and the thickness is 3.2-3.3mm. The part not exposed to the mesh) is 0.60-0.65mm, the total length of the positive electrode is 70-73mm, the crease width is 2-3mm, and the reverse side is distributed with 3 pieces of positive electrodes at intervals. The exposed aluminum expanded mesh is 23-24mm long and 23-24mm wide.

[0073] The total length of the separator is 165-175mm, the width is 25-27mm, and the thickness is 0.1mm; the total length of the lithium strip is 160-170mm, the width is 22.5-23.0mm, and the thickness is 0.11mm; the length of the copper mesh is 93-96mm, the It is 21-22mm and the thickness is 0.06mm.

[0074] Combination and folding are the same as in Example 2.

[0075] The following compares the battery obtained in this example with the battery of the patent whose application number is CN201710825026.3, and the results are as follows:

[0...

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Abstract

The invention discloses a high-current lithium manganese button battery and a preparation method thereof and belongs to the technical field of button batteries. The battery comprises a positive electrode cover, a negative electrode cover, a battery cell and electrolyte, wherein the battery cell and electrolyte are arranged in a sealed cavity formed between the positive electrode cover and the negative electrode cover; the battery cell is formed by stacking a positive plate, a diaphragm and a negative plate and folding; the positive plate consists of an aluminum net and manganese electrode materials laminated on the positive and reverse sides of the aluminum net, the reverse side of the positive plate is provided with N sub-positive plates separated by fold, and the positive side of the positive plate is provided with a positive electrode and (N-1) continuous sub-positive plates formed by exposing the aluminum net; the negative plate consists of a copper net and lithium electrode materials laid on the positive and reverse sides of the copper net, the positive side of the negative plate is provided with a negative electrode and (N-1) continuous sub-negative plates formed by exposingthe copper net, and the reverse side of the negative plate is provided with N continuous sub-negative plates; the diaphragm is arranged between the positive plate and the negative plate, so that the sub-positive plates and the sub-negative plates are separated and combined in a preset manner to be sequentially folded in the same direction along the fold so as to form the battery cell.

Description

technical field [0001] The invention belongs to the technical field of button batteries, and in particular relates to a high-current lithium-manganese button battery and a preparation method thereof. The battery is further improved on the basis of the patent application number 201710825026.3 to increase capacity and reduce processing difficulty. Background technique [0002] In recent years, the development of electronic products is very rapid, and its products are diversified and their application fields are becoming wider and wider. In order to facilitate the use of customers, many electronic products have put forward high requirements on the capacity, volume and output power of the batteries used. Towards the portable trend, in order to meet the market demand, it is imperative to develop new high-power batteries. [0003] For example, the patent application number 201710825026.3 discloses a high-power lithium-manganese button battery, which includes a positive electrode c...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M4/131H01M2/04H01M50/147
CPCH01M4/131H01M10/058H01M2220/30H01M50/147Y02E60/10Y02P70/50
Inventor 王启明夏青王建王伟喻忠元
Owner YICHANG LIJIA TECH
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