Method and winding apparatus for improving separation membrane pulling-out during battery winding
A winding device and battery roll technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of pulling out the diaphragm, wrinkling the core foil, scrapping the core, etc.
Inactive Publication Date: 2017-04-19
SHENZHEN BAK POWER BATTERY CO LTD +1
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AI Technical Summary
Problems solved by technology
After the battery core is wound on the winding needle, the two halves of the winding needle should be pulled out, but when the winding needle is pulled out, the phenomenon of pulling the diaphragm is easy to occur, which will cause the winding core foil to wrinkle
When the problem of pumping the diaphragm is serious, the positive and negative poles of the winding core are in direct contact, which will cause the winding core to be scrapped
Method used
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Embodiment Construction
[0013] Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.
[0014] refer to figure 1 , In one embodiment, a method for improving battery winding and pumping separators, comprising the following steps:
[0015] 1) Winding the positive electrode, the separator and the negative electrode on the needle composed of the first half-rolling needle 1 and the second half-rolling needle 2, and winding the positive electrode 3, the separator 4 and the negative electrode (not shown) into a core, wherein, In the process of winding the positive electrode 3, by controlling the position of the positive electrode 3, the position of the tab 5 of the positive electrode 3 is on the side of the second half-rolling needle 2 that is drawn out later;
[0016] 2) After the winding is completed, firstly draw out the first half of needle...
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The present invention discloses a method for improving separation membrane pulling-out during battery winding. The method comprises: winding a positive electrode, a separation membrane and a negative electrode on a winding needle formed from a first semi winding needle and a second winding needle, and after completing the winding, sequentially pulling out the first semi winding needle and the second winding needle, wherein the position of the electrode lug of the positive electrode is positioned on the side of the finally-pulled-out second winding needle by controlling the entering position of the positive electrode when the positive electrode is wound. The invention further provides a winding apparatus for improving separation membrane pulling-out during battery winding, wherein the winding apparatus is used for winding the positive electrode, the separation membrane and the negative electrode into the winding core, and comprises the first semi winding needle, the second winding needle, and a winding mechanism for controlling the entering positions of the positive electrode, the separation membrane and the negative electrode, and the winding mechanism is used for making the position of the electrode lug of the positive electrode is positioned on the side of the finally-pulled-out second winding needle by controlling the entering position of the positive electrode when the positive electrode is wound. With the method and the winding apparatus of the present invention, the separation membrane pulling-out phenomenon can be substantially reduced, and the yield and the quality of the electrical core can be improved.
Description
technical field [0001] The invention relates to a method and a winding device for improving battery winding and pumping separators. Background technique [0002] Cylindrical lithium-ion batteries, as a kind of green new energy with high energy density and environmental friendliness, have attracted the attention of various battery manufacturers at home and abroad. Improving the pass rate of cylindrical lithium-ion batteries is one of the most concerned issues for battery manufacturers. Among them, the pass rate of the winding process is the most critical factor restricting the pass rate of the entire battery cell, and the defective separator is the main factor in the defective winding products. Bad one, and has long been plagued by major manufacturers. After the battery core is wound on the winding needle, the two halves of the winding needle must be pulled out, but when the winding needle is pulled out, the phenomenon of pulling the diaphragm is easy to occur, which will ca...
Claims
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Login to View More IPC IPC(8): H01M10/0587
CPCH01M10/0587Y02E60/10Y02P70/50
Inventor 张静艾贤峰
Owner SHENZHEN BAK POWER BATTERY CO LTD