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Primary lithium battery with high discharging efficiency

A discharge efficiency and battery technology, which is applied to the electrodes of primary batteries, components of primary batteries, non-aqueous electrolyte batteries, etc., and can solve the problems of broken metal lithium in the negative lithium strip, safety hazards, and small thickness.

Active Publication Date: 2018-02-09
HUIZHOU HUIDERUI LITHIUM BATTERY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For lithium primary batteries made by traditional techniques, the width of the reaction interface corresponding to the positive and negative electrodes includes the entire width of the negative electrode. As the electrochemical reaction continues, the lithium metal of the negative electrode is continuously consumed, and its thickness becomes smaller and smaller. In the later stage, the local area where the negative electrode and the positive electrode are in close contact, due to excessive reaction consumption, forms a part that is not connected to the negative electrode ear, resulting in the breakage of the negative electrode lithium belt, part of the metal lithium cannot continue to participate in the reaction, the utilization rate of the negative electrode decreases, and the battery capacity can't play effectively
However, there are still some battery capacities that are effectively and fully utilized, but there will also be safety hazards after the battery is over-powered.

Method used

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  • Primary lithium battery with high discharging efficiency
  • Primary lithium battery with high discharging efficiency
  • Primary lithium battery with high discharging efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] like figure 2 Shown: a lithium primary battery with high discharge efficiency, including a positive electrode sheet 1, a diaphragm, a lithium strip negative electrode sheet 2, and a tab 3 arranged on the positive and negative electrode sheets, the positive electrode sheet 1, the diaphragm and the lithium strip negative electrode Sheet 2 is wound together with the tab end of the positive electrode sheet as the starting end, and an inhibition reaction area is provided at the winding tail end of the lithium strip negative electrode sheet 2; a polymer tape sheet 4 is provided on the inhibition reaction area ; A groove 5 for stopping the reaction is provided between the tab 3 of the lithium strip negative electrode sheet 2 and the polymer tape sheet 4 . The formation of the positive plate is as follows: Weigh 1843g of heat-treated electrolytic manganese dioxide, 37g of graphite, 120g of conductive carbon black, and 72g of polytetrafluoroethylene solution, stir them in deion...

Embodiment 2

[0017] Prepare lithium strip positive electrode sheet 1 by the method described in embodiment 1, press figure 2 In the position shown, the length and width of the polymer tape sheet 4 are 25mm×4mm, and the length and width of the lithium strip negative electrode sheet are 240mm×25mm. The length of the groove for stopping the reaction is 25 mm, and the depth of the groove 5 accounts for 40% to 90% of the thickness of the entire negative electrode sheet. The width of the groove 5 accounts for 0.1%-7% of the length of the entire negative electrode sheet.

Embodiment 3

[0019] Prepare lithium strip positive electrode sheet 1 by the method described in embodiment 1, press figure 2 In the position shown, the length and width of the polymer tape sheet 4 are 30mm×8mm, and the length and width of the lithium strip negative electrode sheet are 240mm×25mm. The length of the groove for stopping the reaction is 25 mm, and the depth of the groove 5 accounts for 40% to 90% of the thickness of the entire negative electrode sheet. The width of the groove 5 accounts for 0.1%-7% of the length of the entire negative electrode sheet.

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Abstract

The invention relates to the technical field of batteries, in particular to a primary lithium battery with high discharging efficiency. The primary lithium battery comprises a positive plate, a diaphragm, a lithium belt negative plate and lugs arranged on the positive plate and the negative plate, wherein the positive plate, the diaphragm and the lithium belt negative plate are mutually wound together by taking the lug end of the positive plate as a beginning end, and an inhibition reaction region is arranged at the winding tail end of the lithium belt negative plate; a polymer adhesive tape plate is arranged on the inhibition reaction region; and a groove for stopped reactions is arranged between the lug of the lithium belt negative plate and the polymer adhesive tape plate. The inhibition reaction region of the structure can guarantee that regular discharge of the battery is sufficient and effective, and the groove for stopped reactions can guarantee that the lithium belt is broken under overdischarge and forced discharge conditions of the battery, so that the safety of the battery is guaranteed, and the primary lithium battery is high in discharge capacity and excellent in safety performance.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium primary battery with high discharge efficiency. Background technique [0002] For lithium primary batteries made by traditional techniques, the width of the reaction interface corresponding to the positive and negative electrodes includes the entire width of the negative electrode. As the electrochemical reaction continues, the lithium metal of the negative electrode is continuously consumed, and its thickness becomes smaller and smaller. In the later stage, the local area where the negative electrode and the positive electrode are in close contact, due to excessive reaction consumption, forms a part that is not connected to the negative electrode ear, resulting in the breakage of the negative electrode lithium belt, part of the metal lithium cannot continue to participate in the reaction, the utilization rate of the negative electrode decreases, and the battery capaci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/14H01M4/06H01M50/536H01M50/538
CPCH01M4/06H01M6/14H01M50/538H01M50/536H01M4/08H01M6/02H01M50/46
Inventor 何献文潘文硕劳忠奋
Owner HUIZHOU HUIDERUI LITHIUM BATTERY TECHNOLOGY CO LTD
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