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Lithium battery convenient for battery core coiled material to exhaust

A lithium battery and lithium battery separator technology, applied in lithium batteries, non-aqueous electrolyte batteries, electrical components, etc., can solve problems such as unfavorable gas discharge, achieve extended stability, good corrosion resistance and high temperature resistance, and stable use characteristics Effect

Pending Publication Date: 2017-04-26
NANTONG NAIWEITE POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, how to discharge the gas sandwiched between the two pole pieces is particularly important. In the past, the positive and negative electrode coils and separators are flat, which is not conducive to the discharge of gas.

Method used

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  • Lithium battery convenient for battery core coiled material to exhaust
  • Lithium battery convenient for battery core coiled material to exhaust
  • Lithium battery convenient for battery core coiled material to exhaust

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Embodiment Construction

[0019] The present invention will be further described now in conjunction with accompanying drawing. These drawings are simplified schematic diagrams only to illustrate the basic structure of the present invention in a schematic way, so they only show the components relevant to the present invention.

[0020] Such as Figure 1 to Figure 3 As shown, a lithium battery that is convenient for the exhaust of the cell coil 1 includes a battery casing, and the cell coil 1 is arranged inside the battery casing. The upper cover plate of the casing protrudes; the cell coil 1 includes a positive coil 2, a negative coil 3 and a separator, and the separator is located between the positive coil 2 and the negative coil 3;

[0021] The diaphragm includes two lithium battery diaphragms 4 arranged on the left and right. The lithium battery diaphragm 4 is an integrated structure of ultra-high molecular polyethylene. The lithium battery diaphragm 4 is provided with several transversely penetrati...

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Abstract

The invention relates to a lithium battery convenient for a battery core coiled material to exhaust. The lithium battery comprises a battery shell; a battery core coiled material is arranged in the battery shell; the battery core coiled material comprises a cathode coiled material, an anode coiled material and a diaphragm; the diaphragm is positioned between the cathode coiled material and the anode coiled material; the diaphragm comprises two pieces of lithium battery diaphragms arranged bilaterally; the lithium battery diaphragms are ultra-high molecular polyethylene integral structures; a plurality of transverse through micro-holes are arranged on the lithium battery diaphragms; a plurality of diaphragm pipes are arranged between the two lithium battery diaphragms; a plurality of transverse through micro-holes are arranged on the pipe walls of the diaphragm pipes; and the upper end of each diaphragm is higher than the battery core coiled material. When short-circuiting or overcharging occurs in a battery, the temperature of the battery is increased; bubbles are generated between the cathode coiled material and the anode coiled material; the generated bubbles enter pipe holes through the micro-holes on the lithium battery diaphragms and the micro-holes on the diaphragm pipes, and then are discharged from the battery core coiled material through the pipe holes; and thus, the swelling phenomenon of the battery core coiled material is avoided.

Description

technical field [0001] The invention relates to a lithium battery which facilitates exhausting of battery core coils. Background technique [0002] At present, we often hear news of pure electric vehicles catching fire or explosions in a certain place. At present, the reason why batteries are prone to safety accidents is the safety accident caused by the unreasonable design of our battery structure. [0003] First, we need to understand the failure modes of lithium batteries. The modes that cause lithium battery failure include overcharge, overdischarge, high temperature, etc. The main manifestation after failure is to cause a micro-short circuit inside the lithium battery and form gas at the short-circuit diaphragm. This gas exists between the pole pieces, which are soaked in the electrolyte. It is difficult for gas to escape from between the pole pieces. In this way, countless small air pockets are formed between the pole pieces after the battery fails. After squeezi...

Claims

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Application Information

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IPC IPC(8): H01M2/12H01M2/16H01M2/18H01M10/052
CPCH01M10/052H01M50/394H01M50/411H01M50/463Y02E60/10
Inventor 金容升
Owner NANTONG NAIWEITE POWER SUPPLY CO LTD
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