Aluminum-plastic shell-packaged lithium battery

Abstract

The invention discloses an aluminum-plastic shell-packaged lithium battery. The aluminum-plastic shell-packaged lithium battery comprises an aluminum-plastic shell (1) and a battery cell, wherein thealuminum-plastic shell (1) is provided with a groove (1.1) for holding the battery cell, one side edge of the aluminum-plastic shell (1) is provided with a first banded edge (1.2), an air bag (1.4) and a second banded edge (1.3), the air bag (1.4) is disposed between the first banded edge (1.2) and the second banded edge (1.3), the side edge, which is provided with the first banded edge (1.2), ofthe aluminum-plastic shell (1) is provided with high-temperature paper having a heat insulation effect and not having reaction with lithium battery electrolyte, and the high-temperature paper is disposed between the first banded edge (1.2) and the second banded edge (1.3) and close to the first banded edge (1.2). The actual width of the first banded edge of the aluminum-plastic shell-packaged lithium battery is almost same with the expected width of the first banded edge.

Description

technical field [0001] The invention relates to a lithium battery packaged in an aluminum-plastic case. Background technique [0002] At present, among various types of lithium batteries, aluminum-plastic case-packaged lithium batteries are widely used in various digital electronic products due to their advantages of high energy, light weight, and self-defined shape. The soft-pack lithium-ion battery includes an aluminum-plastic case and a battery core, and the aluminum-plastic case is punched with a groove for accommodating the battery core. In the production process of lithium batteries packaged in aluminum-plastic cases, the battery core is first installed in the groove of the aluminum-plastic case; then the aluminum-plastic case is folded in half; after folding, the three sides of the aluminum-plastic case are heat-sealed first, Reserve one side for injecting electrolyte into the aluminum-plastic case; after the electrolyte is injected, seal the last side of the aluminu...

AI Technical Summary

Problems solved by technology

[0003] see figure 1 and figure 2 As shown, the aluminum-plastic case packaging lithium battery in the prior art has the following defects: when the last side of the aluminum-plastic case is sealed for the first time, the aluminum-plastic case near the first side will also be heat-sealed, so that the actual The width of the first edge seal is greater than the expected width of the first edge seal, which reduces the use area of ​​the air bag by about 10%, and due to the uncertainty of the width of the first edge seal, the battery will be damaged in the second seal. At the same time, when stabbing the air bag with a bayonet, it will easily cause the bayonet to not reach the effective position, which will increase the defective rate of the battery

Therefore, in actual operation, in order to reserve a large enough air bag area, the width of the air bag between the battery core and the first edge seal is often increased, thereby increasing the amount of aluminum-plastic case and providing flexible packaging. Lithium-ion batteries add cost

Images