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Heat-resistant composite foil with rapid heating function as well as battery cell and battery made of heat-resistant composite foil

A composite foil and thermal resistance technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of low heating film heating efficiency, poor heating consistency, complex assembly, etc., to improve the temperature of the battery core, good discharge performance, The effect of fast and uniform cell temperature

Active Publication Date: 2019-02-22
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is complicated to assemble, the heating efficiency of the heating film is low, and the cell cannot be heated from the pole piece level, and the heating consistency is still poor

Method used

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  • Heat-resistant composite foil with rapid heating function as well as battery cell and battery made of heat-resistant composite foil
  • Heat-resistant composite foil with rapid heating function as well as battery cell and battery made of heat-resistant composite foil
  • Heat-resistant composite foil with rapid heating function as well as battery cell and battery made of heat-resistant composite foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] This embodiment provides a thermal resistance composite foil 1, the thermal resistance composite foil 1 includes two foils 2, a thermal resistance sandwich structure 3 is arranged between the two foils 2, and the thermal resistance sandwich structure 3 Contains two layers of insulating layers 302 and a layer of thermal resistance sheet 301 placed between the two layers of insulating layers 302;

[0071] Wherein, the two foil materials 2 are aluminum foil, the length of the thermal resistance sheet 301 is slightly longer than the length of the insulating layer 302, the length of the insulating layer 302 is slightly larger than the length of the foil material 2, and the thermal resistance sheet 301 is provided with There is at least one tab of the thermal resistance tab.

[0072] It can be seen from the above structure that the thermal resistance sheet 301 is separated from the two foils 2 by the insulating layer 302 .

[0073] The thermal resistance composite foil mater...

Embodiment 2

[0076] Except that the two foils are replaced by copper foils, the other structures are the same as in Embodiment 1.

[0077] The thermal resistance composite foil material of this embodiment is a thermal resistance composite copper foil, which is connected to the lug of the thermal resistance plate through a built-in power supply or an external power supply, and can generate heat after power-on, achieving the purpose of rapid heating from the pole piece level.

Embodiment 3

[0079] This embodiment provides a thermal resistance composite positive pole piece 4, including two positive electrode diaphragms 5 and a thermal resistance composite foil 1 located between the positive electrode diaphragms 5, and the thermal resistance composite foil 1 includes two foils 2 and a thermal resistance sandwich structure 3 located between two foils 2, the thermal resistance sandwich structure 3 is composed of an insulating layer 302 and a thermal resistance sheet 301 located between the insulating layers 302;

[0080] Wherein, the two foils 2 are aluminum foils, at least two tabs 6 of the thermal resistance sheet are provided on the thermal resistance sheet 301 , and positive tabs are respectively provided on the two foils 2 of the thermal resistance composite foil 1 .

[0081] It can be seen from the above structure that the thermal resistance sheet 301 is separated from the two foils 2 by the insulating layer 302 .

[0082] The heat resistance composite positive...

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Abstract

The invention discloses heat-resistant composite foil with a rapid heating function as well as a battery cell and a battery made of the heat-resistant composite foil. The heat-resistant composite foilcomprises two pieces of foil and at least one layer of heat-resistant sheet located between the two pieces of foil; the heat-resistant sheet is separated from the foil by an insulating layer; the adjacent heat-resistant sheets are separated by the insulating layer when more than two layers of heat-resistant sheets are provided; and the heat-resistant sheet is provided with at least one heat-resistant sheet lug. The heat-resistant composite foil disclosed by the invention is novel in structure; the heat-resistant sheet lug is connected with an external power source or an internal power source,so that the heat-resistant composite foil can be rapidly heated after the power source is electrified; due to the adoption of the heating way, the heat conducting speed is high, heat is uniformly generated inside the battery cell, a voltage window of the battery cell can be controlled better, most of the generated heat is capable of raising the temperature of a pole piece, and the heat efficiencyis high; in addition, the heat-resistant composite foil is capable of increasing the capacity and efficiency of the battery cell and improving the cycle performance of the battery cell.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to a thermal resistance composite foil, a cell and a battery using the same, and in particular to a thermal resistance composite foil with a rapid heating function, and a cell and a battery using the same. Background technique [0002] At present, new energy vehicles and energy storage have achieved rapid development, the core components of which are lithium-ion power batteries. Lithium-ion power batteries contain positive electrodes, negative electrodes and electrolytes. The electrolyte currently used is generally liquid. Due to the high freezing point of the liquid electrolyte, the low-temperature performance deteriorates, such as below 0°C, which will result in reduced power or failure to discharge. Especially in the military field or the cold north, there are greater requirements for low temperature performance. [0003] The current solution is to heat the cells by building a...

Claims

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Application Information

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IPC IPC(8): H01M10/615H01M10/654H01M10/6553H01M10/6571
CPCH01M10/615H01M10/654H01M10/6553H01M10/6571Y02E60/10
Inventor 邹武俊孔令明刘宏勇刘应如华秉杨邹武元
Owner CONTEMPORARY AMPEREX TECH CO
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