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A lithium primary battery with high discharge efficiency

一种放电效率、电池的技术，应用在一次电池的电极、一次电池的零部件、非水电解质电池等方向，能够解决存在安全陷患、反应消耗多、负极利用率下降等问题

Active Publication Date: 2019-06-18
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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  • A lithium primary battery with high discharge efficiency
  • A lithium primary battery with high discharge efficiency
  • A lithium primary battery with high discharge efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] like figure 2 Shown: a lithium primary battery with high discharge efficiency, comprising a positive electrode sheet 1, a diaphragm, a lithium belt negative electrode sheet 2 and a tab 3 arranged on the positive and negative electrode sheet, the positive electrode sheet 1, the separator and the lithium belt negative electrode The sheet 2 is wound together with the tab end of the positive electrode sheet as the starting end, and a restraining reaction area is provided at the winding end of the lithium strip negative electrode sheet 2; the restraining reaction area is provided with a polymer tape sheet 4 ; Between the tabs 3 of the negative electrode sheet 2 of the lithium strip and the polymer adhesive tape sheet 4, there is a groove 5 for suspending the reaction. The formation of the positive electrode sheet is as follows: Weigh 1843g of heat-treated electrolytic manganese dioxide, 37g of graphite, 120g of conductive carbon black, and 72g of polytetrafluoroethylene sol...

Embodiment 2

[0017] The lithium strip positive electrode sheet 1 was prepared according to the method described in Example 1, and the 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 tape negative 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% to 7% of the length of the entire negative electrode sheet.

Embodiment 3

[0019] The lithium strip positive electrode sheet 1 was prepared according to the method described in Example 1, and the 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 tape negative 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% to 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 lithium primary battery with high discharge efficiency. It includes a positive electrode sheet, a separator, a lithium strip negative electrode sheet and tabs arranged on the positive and negative electrode sheets. Together, the winding tail end of the lithium strip negative electrode sheet is provided with an inhibition reaction zone; the described inhibition reaction area is provided with a polymer tape sheet; a stop is provided between the tab of the lithium strip negative electrode sheet and the polymer tape sheet React groove. The inhibiting reaction region of this structure can ensure that the normal discharge of the battery is sufficient and effective, and the stop reaction notch can ensure that the lithium ribbon of the battery is broken under the condition of overdischarge and forced discharge, thereby ensuring the safety of the battery, so the lithium primary battery of the present invention has high discharge capacity, Excellent 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 technology, the width of the reaction interface corresponding to the positive and negative electrodes includes the entire width of the negative electrode. In the later stage, the local area where the negative electrode and the positive electrode are in close contact will form a part that is not connected to the negative electrode ear due to excessive reaction consumption, resulting in the fracture of the negative electrode lithium band, and some metal lithium cannot continue to participate in the reaction. The negative electrode utilization rate decreases and the battery capacity cannot function effectively. However, there are some battery capacities that are effectively and fully utilized, but there will also be safety hazards after the bat...

Claims

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Application Information

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Patent Type & Authority Patents(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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