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A mold device for manufacturing uhmwpe lithium battery diaphragm

A lithium battery diaphragm and mold technology, applied in the field of mechanical processing, can solve the problems of difficult selection of gaskets, long processing cycle, and simple molds, so as to ensure the uniformity of film thickness, solve the problem of low yield, and improve production efficiency.

Active Publication Date: 2019-12-13
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, polyimide is not easy to be thermally deformed, that is, it has good thermal stability at high temperature. During the molding process, it is beneficial to the formation of the lithium battery diaphragm, but it is easy to bond with the lithium battery diaphragm, resulting in difficulty in removing the diaphragm. Ethylene can avoid bonding with the diaphragm, but the film used as a gasket has poor thermal stability at high temperatures
Therefore, the method of compression molding is currently used to make lithium battery separators. The mold is simple, the operation is cumbersome, the gasket is difficult to choose, the processing cycle is long, and the efficiency is low, which seriously hinders the further research of lithium battery separators.

Method used

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  • A mold device for manufacturing uhmwpe lithium battery diaphragm
  • A mold device for manufacturing uhmwpe lithium battery diaphragm
  • A mold device for manufacturing uhmwpe lithium battery diaphragm

Examples

Experimental program
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Embodiment 1

[0024] Such as figure 1 , figure 2 , image 3 As shown, the present invention comprises: mold base 1, sheath 2, lower pressure head 3, upper pressure head 4, pad 5, spring 6, top plate 7, and its structural feature is that mold base 1 is designed as " convex " shape, four The two corners are respectively provided with spring grooves with springs 6 of 15 × 15mm respectively, and the sheath 2 is designed as a "concave" sheath 2 that can cooperate with the "convex" mold base 1, and the middle of the sheath 2 is made. d 1 =65mm, h 1 =20.02±0.001mm cylindrical cavity, the inner wall of the cylindrical cavity is all chrome-plated to ensure accuracy, the cylindrical cavity is straight to the bottom, and the top of the spring 6 can be pushed against the bottom of the sheath 2 that matches the mold base 1; Indenter 3 is d 3 =64±0.01mm, h 3 =10mm cylinder, which can be embedded in the bottom of the cylindrical cavity designed in the middle of the sheath 2, and the upper surface o...

Embodiment 2

[0027] Such as figure 1 , figure 2 , image 3 As shown, the manufacturing method of the UHMWPE lithium battery diaphragm molding die device in this embodiment, the specific steps of the manufacturing method are as follows:

[0028] (1) if figure 1 As shown, the mold base 1 is designed as a "convex" shape, and the four corners are respectively equipped with springs 6 of 15×15mm.

[0029] Cooperate with the mold base 1, design the sheath 2 with a "concave" shape at the bottom, and make d in the middle 1 =65mm, h 1 =20.02±0.001mm cylindrical cavity, the inner wall of the cylindrical cavity is all chrome-plated to ensure accuracy, the mold base 1 is placed stably, and the sheath 2 is placed on the mold base.

[0030] (2) Down pressure head 3 is d 3 =64±0.01mm, h 3 =10mm cylinder, the upper surface of the lower pressure head is sprayed with polytetrafluoroethylene, which is convenient for demolding the lithium battery diaphragm and the lower pressure head. Put it into the ...

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Abstract

The invention discloses a mold device for manufacturing a UHMWPE lithium battery diaphragm. The mold device is designed as a cube as a whole, and specifically includes a base, a sheath, a lower pressure head, an upper pressure head, and two detachable gaskets. The base is designed in a "convex" shape, two cylindrical cavities are designed in the sheath and two slots are designed on the upper surface, and the corresponding upper pressure head is connected to the two pressure columns. The diameter of the upper pressure head pressure column is smaller than the diameter of the lower pressure head. , Spray polytetrafluoroethylene film on the contact surface with the lower pressure head. The upper surface of the lower pressure head is sprayed with polytetrafluoroethylene. The different diameters of the upper and lower pressure heads of this device and the selection of polytetrafluoroethylene material for spraying are conducive to the demoulding of the lithium battery diaphragm, which greatly improves the integrity of the formed diaphragm and improves the yield. The double pressure column design can press two diaphragms at the same time, which obviously improves the production efficiency.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a mold device for manufacturing UHMWPE lithium battery diaphragms. Background technique [0002] At present, the laboratory is researching UHMWPE lithium battery diaphragm, ultra high molecular weight polyethylene (UHMWPE for short), the common molding method is compression molding, the mold used is generally two iron plates, in order to maintain the cleanliness of the diaphragm, it is often placed between the upper and lower iron plates Add spacers. Commonly used gasket materials are generally polytetrafluoroethylene and polyimide. That is, the iron plate is preheated, the gasket is flatly spread on the iron plate carrying the sample, and a certain amount of sample is placed; then the gasket and the iron plate are respectively covered on the sample, and hot pressing and cold pressing are respectively carried out. Finally, remove the gasket and remove the mold. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M2/16H01M10/0525B29C43/36B29L7/00H01M50/403H01M50/417
CPCH01M10/0525B29C43/36B29L2007/00H01M50/431H01M50/403Y02E60/10
Inventor 钱庆荣江纬陈艺兰林宇黄宝铨陈庆华曾令兴薛珲刘欣萍肖荔人
Owner FUJIAN NORMAL UNIV