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Cell stack, lithium-air secondary battery unit and assembly method thereof

A technology of secondary battery cells and cells, which is applied to electrical components, fuel cell type half cells, primary cell type half cells, and hybrid batteries, etc. , low structural stability, etc., to achieve the effect of controllable gas flow and pressure, convenient assembly and high reliability

Active Publication Date: 2018-03-16
CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this form, oxygen is exchanged with the air positive electrode in a free diffusion manner, the rate and efficiency are low, and the utilization rate of the air positive electrode is not high.
Especially for large-area air cathodes, it is very important to provide reactive gases evenly, which is not considered in traditional lithium-air batteries, and it is difficult to evenly distribute air to different areas of air cathodes
In addition, traditional lithium-air batteries, such as Swaglok-type lithium-air batteries, have low structural stability and complex assembly.

Method used

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  • Cell stack, lithium-air secondary battery unit and assembly method thereof
  • Cell stack, lithium-air secondary battery unit and assembly method thereof
  • Cell stack, lithium-air secondary battery unit and assembly method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] See attached figure 1 The cell stack provided in Example 1 of the present invention includes an upper sealing gasket 3a, an upper air positive electrode 20, an upper diaphragm 21, a metal lithium negative electrode 22, a lower diaphragm 23, a lower air positive electrode 24, a negative electrode tab 25, and a lower sealing gasket sheet 3b, the center of the upper sealing gasket 3a is provided with a first through hole 27a, the upper air positive electrode 20 is assembled in the first through hole 27a, and a first upper sealing gasket is also opened between the upper air positive electrode 20 and the upper sealing gasket 3a Sheet liquid injection hole 15aa, the second upper sealing gasket liquid injection hole 15ab; the center of the lower sealing gasket 3b is provided with a second through hole 27b, and the lower air positive electrode 24 is assembled in the second through hole 27b, and the lower air positive electrode 24 is connected to the lower air positive electrode ...

Embodiment 2

[0084] See attached figure 2 The lithium-air secondary battery unit provided in Embodiment 2 of the present invention includes, from top to bottom, an upper end plate 1, an upper gas deflector 2, a cell stack provided in Embodiment 1 of the present invention, a lower gas deflector 4, Lower end plate 5, upper end plate 1 is provided with upper end plate airway hole inlet 7, upper end plate airway hole outlet 8, upper gas deflector 2 is provided with upper gas deflector airway hole inlet 10, upper gas diversion Plate airway hole outlet 11, the lower surface of the upper gas deflector 2 and the upper surface of the lower gas deflector 4 are provided with a gas flow guide mechanism, the upper end plate airway hole inlet 7, the upper gas deflector airway hole inlet 10 , Upper sealing gasket airway hole inlet 13a, lower sealing gasket airway hole inlet 13b, flow guide mechanism, lower sealing gasket airway hole outlet 14b, upper sealing gasket airway hole outlet 14a, upper gas defl...

Embodiment 3

[0093] See attached image 3 , the method for assembling the lithium-air secondary battery unit provided in Embodiment 3 of the present invention comprises the following steps:

[0094] Step 1: Assemble the upper air positive electrode 20 to the upper sealing gasket 3a; assemble the lower air positive electrode 24 to the lower sealing gasket 3b; assemble the negative electrode tab 25 to the metal lithium negative electrode 22;

[0095] Step 2: stack the lower end plate 5, the lower gas deflector 4, the lower sealing gasket 3b assembled with the lower air positive electrode 24, the lower diaphragm 23, and the metal lithium electrode 22 assembled with the negative electrode tab 25 from the bottom to the top. The upper diaphragm 21, the upper sealing gasket 3a assembled with the upper air positive electrode 20, the upper gas deflector 2, and the upper end plate 1;

[0096] Step 3: Fix the upper end plate 2 and the lower end plate 5 together;

[0097] Step 4: Inject the electrolyt...

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Abstract

The invention discloses a cell lamination, a lithium air secondary battery unit and an assembly method thereof and belongs to the technical field of batteries. The cell lamination comprises an upper sealing gasket, an upper air anode, an upper membrane, a lithium metal electrode, a lower membrane, a lower air anode, a lower sealing gasket and a cathode lug. The lithium air secondary battery unit is realized on the basis of the cell lamination. With the assembly method, the lithium air secondary battery unit can be assembled. The lithium air secondary battery unit can charge and discharge normally, and the capacity of the lithium air secondary battery unit is far larger than that of a conventional button cell and a Swaglok type battery.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a cell stack, a lithium-air secondary battery unit and an assembly method thereof. Background technique [0002] With the continuous development of social economy, the shortage of energy resources, environmental pollution and global warming have gradually become social problems that must be faced. In the face of the current international background where energy and environmental issues have attracted much attention, the comprehensive development and utilization of revolutionary energy technology, energy-saving technology and environmental protection technology has become the current primary topic. Research and development of high-performance power supply systems and their Materials are imperative. [0003] Lithium-air battery is a kind of high specific energy chemical power source with metallic lithium or lithium-containing alloy as the negative electrode and oxygen in the air...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M12/06H01M12/02H01M12/00
CPCH01M12/00H01M12/02H01M12/065Y02E60/10
Inventor 赵尚骞卢世刚张立李永伟庄卫东孙浩博张刚宁杨容李久铭
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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