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A thermal battery lithium-boron alloy negative electrode assembly and preparation method thereof

A lithium-boron alloy, thermal battery technology, applied in the electrodes of primary batteries, delayed action cells, etc., can solve the problems of unstable battery electrical performance, battery safety, hidden dangers, etc., to improve design structural strength, improve production efficiency, The effect of reducing production costs

Active Publication Date: 2022-03-04
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the lithium-boron alloy negative electrode assembly for thermal batteries is usually spot-welded on the current collector with nickel wire mesh, and then the lithium-boron negative electrode with a smaller size is pressed on the current collector. This mode is due to the slightly smaller negative electrode assembly. At this time, the edge of the electrolyte is easily affected by the lithium-boron negative electrode, and the edge is prone to drop, resulting in unstable electrical performance of the battery, and there is a safety hazard in the battery during discharge.

Method used

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  • A thermal battery lithium-boron alloy negative electrode assembly and preparation method thereof
  • A thermal battery lithium-boron alloy negative electrode assembly and preparation method thereof
  • A thermal battery lithium-boron alloy negative electrode assembly and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] See attached figure 1 , first put the metal mesh in the cup-type current collector, then put the lithium-boron alloy negative electrode sheet to form a combination, then put the combination into the cup mold for cup pressing, and then take out the combination and put it in the press to suppress.

[0034] A method for preparing the lithium-boron alloy negative electrode assembly of the above thermal battery, comprising the steps of:

[0035] Step 1. Put the metal mesh 2 in the groove on the upper surface of the current collector 3;

[0036] Step 2, placing the lithium-boron alloy negative electrode sheet 1 on the metal mesh 2;

[0037] Step 3: Put the combination of the current collecting sheet 3, the metal mesh 2 and the lithium-boron alloy negative electrode sheet 1 into the cup-wrapping mold for cup-wrapping and pressing, and then take out the combination and put it in the press for pressing.

Embodiment 2

[0039] See attached figure 1 , first spot-weld the metal mesh in the cup-type current collector, then put the lithium-boron alloy negative plate to form a combination, then put the combination into the cup mold for cup pressing, and then take out the combination and put it in the press to suppress.

[0040] A method for preparing the lithium-boron alloy negative electrode assembly of the above thermal battery, comprising the steps of:

[0041] Step 1, spot welding the metal mesh 2 in the groove on the upper surface of the current collector 3;

[0042] Step 2, placing the lithium-boron alloy negative electrode sheet 1 on the metal mesh 2;

[0043] Step 3. Put the combination of current collector 3, metal mesh 2 and lithium-boron alloy negative electrode piece 1 into the cup-wrapping mold for cup-wrapping and pressing, then take out the combination and put it in the press for pressing

Embodiment 3

[0045] Discharge test: The bag cup technology is applied to the thermal battery design. The battery size: Φ63×88, the cell diameter is 50mm, the single cell is 33 pieces, and the iron powder is 34 pieces. High-temperature no-load discharge and low-temperature load discharge. Discharge results see Figure 4 , Figure 5 .

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Abstract

The invention discloses a thermal battery lithium-boron alloy negative electrode assembly and a preparation method thereof, belonging to the technical field of thermal batteries. The thermal battery lithium-boron alloy negative electrode assembly includes a current collector, a metal mesh and a lithium-boron alloy negative electrode sheet; it is characterized in that : the current collector, the metal mesh and the lithium-boron alloy negative electrode sheet are all cylindrical structures, and a circular groove is opened on the upper surface of the above-mentioned current collector sheet, and the metal mesh and the lithium-boron alloy negative electrode sheet are all located on the above-mentioned circle shaped groove; and the metal mesh is sandwiched between the lithium-boron alloy negative electrode sheet and the current collector sheet. By adopting the above technical solution, on the one hand, this patent can improve the design structural strength of the single battery, thereby improving the safety and performance consistency of the battery. On the other hand, the adoption of this technology can effectively improve production efficiency and reduce production costs.

Description

technical field [0001] The invention belongs to the technical field of thermal batteries, and in particular relates to a lithium-boron alloy negative electrode component of a thermal battery and a preparation method thereof. Background technique [0002] The thermal battery is a kind of thermally activated reserve battery that uses the heating system of the battery itself to heat and melt the non-conductive solid-state salt electrolyte into an ion conductor and enter the working state. Lithium-boron alloys have been used in thermal batteries as an excellent anode material. At present, the lithium-boron alloy negative electrode assembly for thermal batteries is usually spot-welded on the current collector with nickel wire mesh, and then the lithium-boron negative electrode with a smaller size is pressed on the current collector. This mode is due to the slightly smaller negative electrode assembly. At this time, the edge of the electrolyte is easily affected by the lithium-bo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/06H01M4/12H01M6/36
Inventor 赵晋峰曹军记辛宇光刘晓伟高晓燕谢婷婷
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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