Thermal battery stack with low internal resistance and preparation method

A technology for thermal batteries and battery stacks, which is applied to the components of primary batteries, battery pack components, circuits, etc., can solve the problems of very serious influence of thermal batteries, drop of output voltage of thermal batteries, and failure of thermal batteries to work normally. The effect of reducing assembly time, reducing battery internal resistance, and reducing stacking processes

Pending Publication Date: 2022-05-10
GUIZHOU MEILING POWER SUPPLY CO LTD
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Problems solved by technology

[0006] Using the above method, it is necessary to prepare the composite sheet and the heating sheet first, and then stack the composite sheet, heating sheet, stainless steel current collector, and stainless steel current collector. Seriously, the hot battery will not work normally. At the same time, there is a certain gap between the pole pieces of the battery stack in this assembly method, and the contact internal resistance is relatively large. The more monomers, the greater the contact internal resistance. When performing high-current discharge, The output voltage of the hot battery drops significantly

Method used

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  • Thermal battery stack with low internal resistance and preparation method
  • Thermal battery stack with low internal resistance and preparation method
  • Thermal battery stack with low internal resistance and preparation method

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[0020] A method for preparing a low internal resistance thermal battery stack: comprising a plurality of stacked battery cells, the battery cells include sequentially stacked silver powder 1 (conductive spacer powder adopts silver powder 1), heating powder 2, conductive spacer powder 1, negative electrode Powder 3, diaphragm 4 powder and positive electrode powder 5; using figure 2 The integrated mold for rapid powder spreading and demoulding shown is prepared. (1) Silver powder 1 is flattened: Silver powder 1 is weighed and added into the bowl-shaped mold frame through a funnel, and then the bowl-shaped scraper of the automatic powder-feeding and spreading system is The bowl-shaped groove above the mold cavity rotates at a speed of 5r / s. At the same time, the mold frame and the automatic powder spreading system above it rise slowly at a speed of 0.10mm / s, so that the silver powder 1 enters the cylindrical cavity below the mold cavity. The automatic powder spreading system sto...

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Abstract

The invention discloses a low-internal-resistance thermal battery stack and a preparation method in the technical field of thermal batteries. The preparation method comprises the following steps: weighing, flattening and stacking conductive isolation powder, heating powder, conductive isolation powder, negative electrode powder, diaphragm powder and positive electrode powder respectively; carrying out repeated monomer stacking according to the required monomer quantity; and then pressing and demolding are carried out. According to the thermal battery technology in the scheme, the gaps among the pole pieces are reduced, the internal resistance of the battery is reduced, the performance of the thermal battery is improved, and particularly, a pulse type thermal battery is more obvious.

Description

technical field [0001] The invention relates to the technical field of thermal batteries, in particular to a low internal resistance thermal battery cell stack and a preparation method. Background technique [0002] A thermal battery is a primary reserve battery that uses molten salt as an electrolyte, which is activated by melting it with its own heat source. It has the advantages of short activation time, wide operating environment temperature, long storage period, and maintenance-free, and is more and more widely used in weapon equipment systems. [0003] Thermal battery stacks are generally composed of heating sheets, stainless steel current collectors, composite sheets (including positive electrodes, diaphragms and negative electrodes integrally formed), stainless steel current collectors and other pole pieces stacked in a certain order, and jacks or presses are required after stacking. A machine, etc. exerts a certain pressure on the battery stack to reduce the contac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/36H01M50/204H01M50/40H01M6/02
CPCH01M6/36H01M6/02H01M50/204H01M50/40
Inventor 李海君卢丫赵洪楷卢崇庆刘美美王幸陈从云杨冬丽秦雪敏朱琳
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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