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Composite negative electrode sheet with rapid heating function, and cell and battery using same

A negative pole piece and negative pole piece technology, which is applied in the field of composite negative pole piece with rapid heating function, rapid heating of batteries and batteries, and can solve problems such as poor heat production rate and temperature uniformity, limited application scenarios, and poor user experience, etc. problems, to achieve the effect of uniform heat production, fast heat conduction, and small production changes

Active Publication Date: 2021-09-21
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solid-state battery is limited to self-heating function when the battery is short-circuited, its application scenarios are limited, user experience is poor, and the way of heating outside the battery cell has problems of slow heating speed, poor heat generation rate and temperature uniformity

Method used

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  • Composite negative electrode sheet with rapid heating function, and cell and battery using same
  • Composite negative electrode sheet with rapid heating function, and cell and battery using same
  • Composite negative electrode sheet with rapid heating function, and cell and battery using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This embodiment provides a composite negative electrode plate 1 including two negative electrode sheet 2, and two negative electrode sheets 2 are provided with a thermal resistance sandwich structure 3, the thermal resistance sandwich structure 3 contains two The layer diaphragm 302 and a layer of heat resistance sheet 301 disposed intermediate in the two-layer diaphragm 302 are provided with two thermal resistant sheets 4 having a certain spacing on the thermal resistance sheet 301. Among them, the negative pole sheet 2 is a single-sided negative electrode sheet, and the slurry layer of the single-sided negative electrode sheet is toward the inside of the composite negative electrode plate 1.

[0063] It can be seen from the above structure that is spaced from the diaphragm 302 between the heat resistance sheets 301 and the two negative electrode sheets 2.

[0064] The composite negative electrode sheet of the present embodiment is connected by a built-in power source or a...

Embodiment 2

[0068] The other structure is the same as in Example 1 in addition to the double-sided negative electrode sheet.

[0069] The composite negative electrode sheet of the present embodiment is connected by a built-in power source or an external power source and a thermal resistant sheet, which can be energized after power is energized, and the purpose of rapid heating from the pole level level.

Embodiment 3

[0071] The present invention provides a battery, including a positive electrode, a diaphragm, and an negative electrode, and the positive electrode and the negative electrode are located on both sides of the diaphragm, and the negative electrode is the composite negative electrode plate, the assembly mode of the battery is: according to ... positive , The sequence of the diaphragm, the composite negative electrode, the diaphragm, the positive electrode, the diaphragm, the composite negative electrode plate, the diaphragm, the positive electrode, and then wound, and the bare core is obtained.

[0072] At the positive electrode and the negative electrode, the positive electrode pole and the negative electrode ear are provided, and the positive electrode ears and the negative electrode ears are connected to the top cover, and the heat resistance ear is cut into the outside of the cell, and the heating, sealing through the external circuit control strategy. After the electrolyte is in...

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Abstract

The invention discloses a composite negative electrode sheet with a rapid heating function, and an electric core and a battery using the same. The composite negative electrode sheet includes two negative electrode sheets and at least one layer of thermal resistance sheet, and the thermal resistance sheet and the negative electrode sheet are separated by a diaphragm. When the number of layers of the thermal resistance sheet is more than two layers, the adjacent thermal The resistance plates are separated by a diaphragm, and at least one tab of the heat resistance plate is arranged on the heat resistance plate. The composite negative pole piece of the present invention has a novel structure. By connecting the tab of the thermal resistance plate with an external power supply or a built-in power supply, rapid heating of the composite negative pole piece can be realized after power-on. Uniform heat is conducive to better control of the voltage window of the battery cell. Most of the heat generated can accurately increase the temperature of the pole piece, with high thermal efficiency. Moreover, the composite negative pole piece can improve the capacity efficiency and cycle performance of the battery cell.

Description

Technical field [0001] The invention belongs to the technical field of the battery, involving a composite negative electrode plate, and a battery and battery adopted, and more particularly to a composite negative electrode plate having a rapid heating function, and the battery cell and battery are quickly heated, improved Electric Coil low temperature discharge performance. Background technique [0002] Solid state batteries is a power battery that has great potential in the future due to high energy density and high safety performance. However, due to the use of solid-state electrolytes, the electrical conductivity is low in low temperature and normal temperature, and the portion of the solid state battery needs to be normal at a high temperature at 60 ° C. Currently, the external heating is usually used to improve the ambient temperature of the battery pack, thereby reaching the temperature of the normal operation. However, external heating is transmitted to the electrical core...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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