Shaped lithium-manganese soft package battery and manufacturing method thereof

Abstract

The invention discloses a shaped lithium-manganese soft package battery and a manufacturing method thereof. The manufacturing method comprises the following steps: (a) punching a large positive plate into a shaped positive plate; (b) punching a lithium strip into a shaped negative plate; (c) welding a positive tab and bonding a negative tab; (d) carrying out bending and adhesive-tape terminating on a diaphragm, the shaped positive plate and the shaped negative plate on the connected part of shaped negative element sheets and the connected part of the shaped positive element sheets in a winding manner to form a shaped battery core; (e) putting the shaped battery core into a shaped aluminum-plastic housing and carrying out primary sealing and electrolyte injection; and (f) carrying out secondary sealing to obtain the shaped battery. The shaped battery is customized according to the shape of a battery compartment of an electrical appliance; an effective space of the battery compartment is fully utilized; and the battery capacity is maximized, so that the service lifetime of the electrical appliance is prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium-manganese batteries, in particular to a method for manufacturing a special-shaped lithium-manganese soft package battery and a special-shaped battery prepared based on the method. Background technique [0002] Due to the characteristics of high capacity, high voltage, high safety, low self-discharge rate, long service life and flexible design, disposable lithium-manganese batteries are more and more widely used in emerging electronic tags and wearable electronic devices. Due to the unique shape design of some personalized electronic devices, the battery compartment space used by the battery is irregular or polygonal in shape. Ordinary quadrilateral lithium-manganese soft-packed batteries cannot maximize the use of the battery compartment space, which makes the service life of electronic equipment longer. discount. [0003] The utility model patent with the patent number of 200720087439.8 disclose...

AI Technical Summary

Problems solved by technology

Due to the unique shape design of some personalized electronic devices, the battery compartment space used by the battery is irregular or polygonal in shape. Ordinary quadrilateral lithium-manganese soft-packed batteries cannot maximize the use of the battery compartment space, which makes the service life of electronic equipment longer. discount

[0003] The utility model patent with the patent number of 200720087439.8 discloses a flexible package lithium-manganese disposable square battery structure, and its preparation process is disclosed in the specification. Square batteries cannot meet market needs

In the prior art, the method for preparing special-shaped lithium-manganese flexible packaging batteries is the stacking method, that is, punching to form a plurality of positive electrode sheets of the same shape, and a plurality of negative electrode sheets of the same shape. The negative electrode sheet is folded on both sides of the separator. Although the lamination method can meet the requirements of the battery's irregular shape, it also has many disadvantages: there are many battery electrodes, resulting in a lot of scrap, and the production efficiency is low; multi-layer electrode welding is difficult, which may Insufficient welding, poor welding, or over-welding, part of the pole piece is welded or partly broken, and the occurrence of false welding and over-welding will cause some pole pieces to fail to function, and the battery will have low capacity, and more seriously, it will be damaged during use Safety accidents occur; and batteries with small size and small capacity are not suitable for stacked production, because the pole pieces are small and difficult to operate, and the production efficiency is low

[0004] To sum up, the conventional lithium-manganese battery process is easy to mechanize by winding and forming, with fast speed and good uniformity, which is conducive to large-scale production, but it is only suitable for the production of batteries with conventional shapes; However, the reliability will be reduced and the production efficiency will not be high

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