Soft-pack power battery aluminum-plastic film slitting device and method

A power battery and aluminum-plastic film technology is applied in the field of aluminum-plastic film slitting devices for soft-pack power batteries to achieve the effects of smooth slitting surface, low battery edge voltage, and reduced puncture risk.

Active Publication Date: 2019-03-08
桑顿新能源科技(长沙)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the development of a new soft-pack power battery aluminum-plastic film cutting device and its method to improve the metal tailing problem caused by shear dislocation not onl

Method used

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  • Soft-pack power battery aluminum-plastic film slitting device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An aluminum-plastic film slitting device for a soft pack power battery, used for slitting the aluminum-plastic film 4 with a thickness of 113um. The device comprises a cutting blade 1, a blade fixing fixture 2 and a slide bar 3 thereof, the cutting blade 1 is fixedly mounted on the blade fixing fixture 2, and the blade fixing fixture 2 is slidably mounted on the slide bar 3 Above, the reciprocating slide is realized under the constraints of the slide bar 3, the slitting blade adopts a single blade, the initial position is either side of the aluminum-plastic film, the slitting blade is always perpendicular to the horizontal plane, and the slitting blade is always perpendicular to the horizontal plane. The blade is provided with an arc-shaped knife edge. When the arc-shaped knife-edge makes the aluminum-plastic film non-parallel to the horizontal plane, the arc-shaped knife-edge is kept perpendicular or close to the edge of the aluminum-plastic film at any point of contact...

Embodiment 2

[0045] Using the slitting device described in Example 1 to realize the slitting method of the aluminum-plastic film of the soft pack power battery with a thickness of 113um includes the following steps:

[0046] 1. The aluminum-plastic film is fixedly unwound on the feeding reel, and the aluminum-plastic film moves forward through the belt traction device;

[0047] 2. The aluminum-plastic film passes through the rectangular hole in the middle of the anti-wrinkle rod, smoothing it to prevent it from lifting;

[0048] 3. After the aluminum-plastic film travels to the required set distance, the upper pressing rod and the lower pressing rod press the aluminum-plastic film to fix it;

[0049] 4. The blade fixing fixture is placed on either side of the aluminum-plastic film, select the appropriate slitting blade, install the slitting blade, the slitting blade and the fixing fixture slide on the slide bar, and control the slitting speed of the slitting blade to 0.5cm / s, realize the...

Embodiment 3

[0051] An aluminum-plastic film cutting device for a soft-pack power battery is used for cutting the aluminum-plastic film with a thickness of 153um. The difference with embodiment 1 is:

[0052] The radian of the knife edge of the slitting blade is 0.95 rad, and the slitting blade is provided with an arc-shaped knife back, and the radian of the knife back is consistent with the radian of the knife edge. There is a rectangular hole in the middle of the aluminum-plastic film anti-wrinkle rod, and the upper and lower gaps of the rectangular hole are 5mm.

[0053] The radian of the slitting blade and the upper and lower gaps of the rectangular hole are 5mm, which are compatible with the aluminum-plastic film with a thickness of 153um, which improves the slitting effect. In the horizontal slitting direction, a single arc-shaped The blade cuts from one side, avoiding metal tailing caused by shearing misalignment, reducing the risk of puncturing the nylon layer and CPP heat seal la...

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Abstract

The invention discloses a soft-pack power battery aluminum-plastic film slitting device and method. The soft-pack power battery aluminum-plastic film slitting device includes slitting blades, a bladefixing fixture and a sliding rod, and the slitting blades are fixedly installed on the blade fixing fixture; and the soft-pack power battery aluminum-plastic film is characterized in that the blade fixing fixture is slidably installed on the sliding rod and slides back and forth under restraint of the sliding rod, the slitting blades are provided with arc-shaped cutting edges, and under the condition that an aluminum-plastic film is not parallel to the horizontal plane through the arc-shaped cutting edges, the arc-shaped cutting edges are at any contact point with the edge of the aluminum-plastic film and remains vertical or nearly vertical to the edge of the aluminum-plastic film. According to the soft-pack power battery aluminum-plastic film slitting device and method, in the transverseslitting direction, the single circular arc blades are arranged on the left and right parts of the aluminum-plastic film for slitting from the single side direction, metal trailing due to shear dislocation is avoided, the puncture risks of a nylon layer and a CPP heat sealing layer is lowered, the polygonal voltage of a battery is small, the risk of leakage is greatly lowered, the slitting sectionis smooth, and the phenomenon of oxidation stratification of the edge of the aluminum-plastic film can be effectively avoided.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to an aluminum-plastic film cutting device and method for a soft pack power battery. Background technique [0002] In the field of new energy, benefiting from the promotion of national subsidy policies, the shipments of consumer and power batteries have grown rapidly. Due to the absolute advantage of aluminum-plastic film over steel and aluminum shells in terms of light weight, the energy density of the battery can be increased by 10%-15% without changing the positive and negative electrode materials. Under the condition that the energy density is linked to the subsidy amount, soft-pack batteries are the trend of future battery development. Aluminum-plastic film is used as the packaging material for soft-pack lithium batteries, and the market space for aluminum-plastic film will continue to expand. [0003] The structure of the aluminum-plastic film is mainly composed of a multi-...

Claims

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Application Information

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IPC IPC(8): B65H35/06
CPCB65H35/06Y02P70/50
Inventor 陈建鹏娄忠良李瑞法徐伟崔俊葳
Owner 桑顿新能源科技(长沙)有限公司
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