High-current lithium manganese button battery and preparation method thereof

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...

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 prone to powder removal, resulting in the exposure of the current collecting net. , It is easy to pierce the diaphragm during the assembly process, resulting in a short circuit of the battery cell and a low product qualification rate;

[0007] (3) On the basis of increasing the output power of the above process, the battery capacity does not increase much. If the capacity of the battery is to be increased, the volume of the battery must be increased

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