Lithium battery with low-temperature self-heating function and working method thereof

A working method, lithium battery technology, applied in battery electrodes, secondary batteries, secondary battery charging/discharging, etc., can solve the problems of high design requirements, poor high temperature performance, high price, etc., and achieve excellent low temperature performance and rate performance , the effect of avoiding the waste of energy

Pending Publication Date: 2020-11-03
SHANGHAI YUYUAN POWER TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The active materials of some lithium-ion batteries often have excellent low-temperature performance but poor high-temperature performance, so they cannot be used normally, or batteries

Method used

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  • Lithium battery with low-temperature self-heating function and working method thereof
  • Lithium battery with low-temperature self-heating function and working method thereof
  • Lithium battery with low-temperature self-heating function and working method thereof

Examples

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Example Embodiment

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0037] like Figure 1-3 As shown, a lithium battery with a low-temperature self-heating function includes one or two batteries, and the batteries include several positive pole pieces 1, several negative pole pieces 2, several separators 4, which are alternately wound or stacked. When the battery includes one cell, a heating pole piece 3 is provided on the outside of the battery cell; when the lithium battery includes two cells, a heating pole piece 3 is provided between the cells; There is a temperature sensor 5, the heating pole piece 3 is provided with a tab 31, and the size of the heating pole piece 3 is larger than the size of the positive pole piece 1 and smaller than the size of the negative pole piece 2, the positive pole piece 1 and The heating pole pieces 3 are connected through a circuit that can be controlled to be disconnected, an...

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PUM

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Abstract

The invention relates to a lithium battery with a low-temperature self-heating function and a working method thereof. The lithium battery comprises one or two battery cells, and each battery cell comprises a plurality of positive plates, a plurality of negative plates and a plurality of diaphragms, which are alternately wound or superposed; when the lithium battery comprises one battery cell, a heating pole piece is arranged on the outer side of each battery cell; when the lithium battery comprises two battery cells, a heating pole piece is arranged between the battery cells; a temperature sensor is arranged in the battery cell, the heating pole piece is provided with a pole lug, the size of the heating pole piece is larger than that of the positive pole piece and smaller than that of thenegative pole piece, and the positive pole piece and the heating pole piece are connected through a circuit capable of controlling on-off; the heating pole piece and the negative pole piece are connected through a circuit capable of controlling on-off, and the circuit capable of controlling on-off is connected with a battery management system. According to the invention, low-temperature dischargeis satisfied, and other performances do not need to be sacrificed too much or extra cost does not need to be increased too much.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium battery with a low-temperature self-heating function and a working method thereof. Background technique [0002] Lithium-ion batteries have become the most important chemical energy storage devices because of their high-voltage platform, high specific energy density, low self-discharge, long cycle life, and environmental protection. They are widely used in various energy storage and new energy electric vehicles. At present, in the field of lithium-ion batteries, due to the limitation of the operating temperature window of lithium batteries, many devices powered by lithium batteries cannot be used normally in cold climate conditions, which greatly affects the promotion of green energy in cold areas. [0003] The existing technical solutions are generally divided into two types, external heating and internal heating. In the way of external heating, a heating de...

Claims

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Application Information

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IPC IPC(8): H01M10/615H01M10/625H01M10/633H01M10/637H01M10/647H01M10/6554H01M10/6555H01M10/6571H01M10/44H01M4/131H01M4/485H01M10/0525
CPCH01M4/131H01M4/485H01M10/0525H01M10/441H01M10/446H01M10/448H01M10/615H01M10/625H01M10/633H01M10/637H01M10/647H01M10/6554H01M10/6555H01M10/6571Y02E60/10
Inventor 尚德华杨泽乾
Owner SHANGHAI YUYUAN POWER TECH CO LTD
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