Liquid injecting, sealing and forming method of soft packaging lithium-ion battery

Abstract

The invention relates to a liquid injecting, sealing and forming method of a soft packaging lithium-ion battery. The liquid injecting, sealing and forming method comprises the following operation steps of packaging an aluminum plastic film at one side of the soft packaging lithium-ion battery to form a tubular channel; carrying out vacuum liquid injection of a soft packaging battery cell by utilizing the tubular channel of the aluminum plastic film, and clamping the tubular channel of the aluminum plastic film by using a sealing clamp after liquid injection, so that the interior of the soft packaging lithium-ion battery is isolated with outside; laying the soft packaging lithium-ion battery with the sealing clamp aside after liquid injection, and forming after laying aside; and in the event of forming, connecting the tubular channel of the aluminum plastic film of the soft packaging lithium-ion battery with a vacuum pipeline, then, opening the sealing clamp fixed on the tubular channel of the aluminum plastic film of the soft packaging lithium-ion battery, so that the interior of the soft packaging lithium-ion battery is connected with the vacuum pipe, forming by vacuumizing the interior of the soft packaging lithium-ion battery, and clamping the tubular channel of the aluminum plastic film of the soft packaging lithium-ion battery by using the sealing clamp after forming.

Description

technical field [0001] The invention relates to a production process of a soft-packed lithium-ion battery, in particular to a method for liquid injection, sealing and formation of a soft-packed lithium-ion battery. Background technique [0002] Flexible packaging lithium-ion batteries are favored by people for their advantages such as high energy density and good safety performance. Superior and widely concerned by people. [0003] The traditional method of liquid injection and packaging of flexible packaging lithium-ion batteries in the form of large-capacity laminates is vacuum liquid injection packaging. The traditional formation methods are pressurized sealing formation, pressurized opening formation, and vacuumization formation. The pressure required for pressurized formation is high. The equipment is complicated and the equipment cost is high, and the pouch battery requires a large air bag, and the cost of aluminum-plastic film is high, which increases the raw materia...

AI Technical Summary

Problems solved by technology

[0003] The traditional liquid injection and packaging method of flexible packaging lithium-ion batteries in the form of large-capacity laminates is vacuum liquid injection packaging. The traditional formation methods are pressurized sealing formation, pressurized opening formation, and vacuum formation. The pressure required for pressurized formation is high. The equipment is complicated and the equipment cost is high, and the pouch battery requires a large air bag, and the cost of aluminum-plastic film is high, which increases the raw material cost of the pouch battery

The traditional vacuumization is to encapsulate the PP tube on the pouch battery air bag. The outer diameter and inner diameter of the PP tube should not be too large due to the packaging limitation, the packaging qualification rate is low, the pumping speed is slow, and the packaging process is complicated.

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