Extension device for lithium battery diaphragm
A lithium battery separator and electromagnet technology, applied in the field of lithium batteries, can solve the problems of reducing the lithium ion passing capacity of the separator and reducing the performance of the lithium battery, and achieve the effect of ensuring lithium ion passing performance, improving performance, and ensuring continuous production.
Active Publication Date: 2018-07-17
JIESHOU CITY TIANHONG PACKAGING MATERIAL
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Problems solved by technology
In the prior art, the lithium battery diaphragm is mostly produced by unidirectional stretching method to stretch and extend the length of the diaphragm. In the process of stretching and extending the diaphragm in one direction, the lithium ion passing capacity of the diaphragm will be seriously reduced. After using the diaphragm prepared by the above method, the performance of the lithium battery is seriously reduced
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[0017] combine figure 1 and figure 2 , the present invention is further described:
[0018] The stretching device of the lithium battery diaphragm includes a feeding unit of the lithium battery diaphragm 10, and the discharge end of the feeding unit is provided with a width stretching mechanism, and the width stretching mechanism includes clamping units arranged on both sides of the lithium battery diaphragm 10, so The clamping unit is arranged on the transmission crawler belt 30. The transmission direction of the transmission crawler belt 30 forms an angle with the conveying direction of the lithium battery separator 10 and is arranged to extend outward. The discharge end of the width stretching mechanism is provided with a length stretching mechanism. The length stretching mechanism includes a receiving roller 50, and the receiving roller 50 is connected with a driving unit, and the driving unit drives the receiving roller 50 to rotate.
[0019] combine figure 2 As show...
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The invention relates to a stretching device for a lithium battery diaphragm, which includes a feeding unit for the lithium battery diaphragm. The discharge end of the feeding unit is provided with a width stretching mechanism, and the width stretching mechanism includes clamping units arranged on both sides of the lithium battery diaphragm. The clamping unit is arranged on the transmission crawler. The transmission direction of the transmission crawler is at an angle to the conveying direction of the lithium battery diaphragm and is arranged to extend outward. The discharge end of the width stretching mechanism is provided with a length stretching mechanism. The length stretching mechanism includes The receiving roller, the drive unit drives the receiving roller to rotate, and the driving unit of the length stretching mechanism is used to drive the receiving roller to rotate, so as to realize the stretching of the lithium battery separator in the length direction, and the clamping unit of the width stretching mechanism is used to implement the lithium battery separator. The clamping of the side of the battery diaphragm realizes the stretching of the width of the lithium battery diaphragm, and realizes the purpose of extending the length direction and width direction of the lithium battery diaphragm at the same time, ensuring the continuous production of the entire production line and ensuring the passage of lithium ions in the lithium battery diaphragm performance.
Description
technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a stretching device for lithium battery separators. Background technique [0002] In the structure of lithium batteries, the separator is one of the key inner components. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle and safety performance of the battery. A separator with excellent performance plays an important role in improving the overall performance of the battery. The main function of the lithium battery separator is to separate the positive and negative electrodes of the battery to prevent the short circuit caused by the contact between the two electrodes. In addition, it also has the function of allowing electrolyte ions to pass through. In the prior art, the lithium battery diaphragm is mostly produced by unidirectional stretching method to stretch and exten...
Claims
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IPC IPC(8): H01M2/14H01M50/403
CPCH01M50/403Y02E60/10
Inventor 尚诚德吴磊胡伟张德顺李汪洋
Owner JIESHOU CITY TIANHONG PACKAGING MATERIAL