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Improved lithium ion small battery

A small battery, lithium ion technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor low temperature performance, hidden dangers, safety and other problems, achieve long cycle life, strong safety performance, and solve problems with poor low temperature performance. Effect

Pending Publication Date: 2020-06-05
SHANDONG ZHAOWEN NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a fatal problem in the graphite negative electrode, that is, when the battery is charged quickly or overcharged, metal lithium may be precipitated on the surface of the electrode material, and dendrites may be formed to cause a short circuit. The performance is poor, so finding a lithium-ion battery technology solution with excellent performance has become an urgent problem to be solved

Method used

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  • Improved lithium ion small battery
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] as attached figure 1 , 3 And the lithium ion small-sized battery shown in 4, it is No. 5 battery. It includes a cylindrical steel shell 1, a cap 8 integrated with a pressure reducing valve, an insulating pad 9 and an electric core. The cylindrical steel shell 1 is open at the top and closed at the bottom, the electric core is placed inside the cylindrical steel shell 1, the cap 8 is located on the top of the cylindrical steel shell 1, and the annular insulating pad 9 is half-wrapped in the cap 8 peripheral edges, used to isolate the cylindrical steel shell 1 and the cap 8, and the cap 8 and the insulating pad 9 are integrally connected with the cylindrical steel shell 1 by pressing.

[0027] as attached figure 2 As shown, the battery core is formed by winding the positive pole piece 2, the diaphragm 3 and the negative pole piece 4, that is, the positive pole piece 2, the diaphragm 3 and the negative pole piece 4 are wound in three layers, and the material of the pos...

Embodiment 2

[0029] as attached figure 1 , 3 And the lithium ion small-sized battery shown in 4, it is No. 5 batteries. It includes a cylindrical steel shell 1, a cap 8 integrated with a pressure reducing valve, an insulating pad 9 and an electric core. The top of the cylindrical steel shell 1 is open and the bottom is closed, the battery core is placed in the cylindrical steel shell 1, the cap 8 is located on the top of the cylindrical steel shell 1, the cap 8 is a "convex" shape structure, and the insulating The pad 9 is half-wrapped around the periphery of the cap 8 for isolating the cylindrical steel shell 1 and the cap 8, and the cap 8 and the insulating pad 9 are integrally connected with the cylindrical steel shell 1 by pressing.

[0030] as attached figure 2 As shown, the battery core is formed by winding the positive pole piece 2, the diaphragm 3 and the negative pole piece 4, that is, the positive pole piece 2, the diaphragm 3 and the negative pole piece 4 are wound in three ...

Embodiment 3

[0032] as attached figure 1 , 3 And the lithium ion small-sized battery shown in 4, it is No. 7 batteries. It includes a cylindrical steel shell 1, a cap 8, an insulating pad 9 and an electric core. The top of the cylindrical steel shell 1 is open and the bottom is closed, the battery core is placed inside the cylindrical steel shell 1, the cap 8 is located on the top of the cylindrical steel shell 1, and the annular insulating pad 9 is placed half-wrapped around the cap 8. Peripherally, the cap 8 and insulating pad 9 are integrally connected with the cylindrical steel shell 1 by pressing.

[0033] as attached figure 2 As shown, the battery core is formed by winding the positive pole piece 2, the diaphragm 3 and the negative pole piece 4, that is, the positive pole piece 2, the diaphragm 3 and the negative pole piece 4 are wound in three layers, and the material of the positive pole piece 2 is Lithium nickel manganese oxide (LiNi 0.5 mn 1.5 o 4 ) material, and the mate...

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Abstract

The invention relates to a small lithium ion battery. The small lithium ion battery comprises a cylindrical steel shell, a cover cap matching the cylindrical steel shell, an insulating pad for isolating the cylindrical steel shell from the cover cap, and a battery cell positioned in the cylindrical battery shell. The key technical points are that the battery cell is formed by winding a positive pole piece, a diaphragm and a negative pole piece; the positive pole piece is connected with a positive pole lug; the negative pole piece is connected with a negative pole lug; a safety valve is arranged above the battery cell; the positive pole lug is connected with any one of the cylindrical steel shell and the cover cap; the negative pole lug is connected with the other one of the cylindrical steel shell and the cover cap; the positive pole piece is made of a lithium-containing material; and the negative pole piece is made of one or two of a material based on lithium titanate as a main body or an oxidized alloy material. The small battery provided by the invention has the advantages of quick charging, no combustion during shearing, normal charging and discharging at low temperature, strong safety performance and long cycle life.

Description

technical field [0001] The invention belongs to the technical field of batteries, in particular to a lithium-ion small battery. Background technique [0002] At present, AA rechargeable batteries and AA rechargeable batteries on the market are roughly divided into nickel-metal hydride batteries, nickel-cadmium batteries and lithium-ion batteries. Compared with nickel-hydrogen batteries and nickel-cadmium batteries, lithium-ion batteries have the advantages of high safety and environmental protection. The positive electrodes of existing lithium-ion batteries mainly include lithium-containing materials such as lithium iron phosphate, lithium manganese oxide, lithium cobalt oxide, and lithium nickel manganese oxide. The negative electrodes generally use graphite materials for intercalation and extraction of lithium ions. There is a fatal problem in the graphite negative electrode, that is, when the battery is charged quickly or overcharged, metal lithium may be precipitated on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M10/0525H01M10/0587
CPCH01M4/485H01M10/0525H01M10/0587Y02E60/10Y02P70/50
Inventor 李亚昭
Owner SHANDONG ZHAOWEN NEW ENERGY TECH CO LTD