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High-safety lithium ion battery and manufacturing method thereof

A technology of lithium-ion batteries and manufacturing methods, which is applied in the field of high-safety lithium-ion batteries, can solve problems such as explosion, battery system damage, and combustion, and achieve the effect of improving safety performance and preventing combustion or even explosion

Inactive Publication Date: 2014-06-04
XIAMEN CHL NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the safety issues of lithium-ion batteries can be divided into two levels: one is that the closed lithium-ion battery system has not been damaged, but there is a potential danger, which mainly involves the thermal stability of the material; the other is that the battery system has been damaged. If damaged, there may be a risk of burning or even explosion under the action of flammable electrolyte and oxygen outside the battery

Method used

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  • High-safety lithium ion battery and manufacturing method thereof
  • High-safety lithium ion battery and manufacturing method thereof
  • High-safety lithium ion battery and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Utilize the method for the present invention to make battery capacity and be 60Ah high safety lithium-ion battery, can implement according to the following steps:

[0028] (1) Make three soft-packed lithium-ion battery cells with a battery capacity of 20Ah by winding or stacking;

[0029] (2) Put three soft-packed lithium-ion battery cells with a battery capacity of 20Ah into the steel case and seal it;

[0030] (3) Use a pump to pump out the air inside the battery, put it in a vacuum state, fill it with 99.999% high-purity nitrogen, keep the pressure in the battery case at 0.15MPa, seal it, and the battery is completed.

Embodiment 2

[0032] Utilize the method for the present invention to make battery capacity and be 50Ah high safety lithium-ion battery, can implement according to the following steps:

[0033] (1) Two soft-packaged lithium-ion battery cells with a battery capacity of 20Ah and one soft-packaged lithium-ion battery cell with a battery capacity of 10Ah are produced by winding or lamination;

[0034] (2) Put 3 soft-packed lithium-ion battery cells into the plastic case and seal it;

[0035] (3) Use a pump to pump out the air inside the battery, put it in a vacuum state, fill it with 99.999% high-purity argon, keep the pressure in the battery case at 0.01MPa, seal it, and the battery is completed.

Embodiment 3

[0037] Utilizing the method of the present invention to make battery capacity is that 10Ah high-safety lithium-ion battery can be implemented according to the following steps:

[0038] (1) Manufacture a soft-packed lithium-ion battery cell with a battery capacity of 10Ah by winding or stacking;

[0039] (2) Put a single 10Ah soft-packed lithium-ion battery cell into the aluminum case and seal it;

[0040] (3) Use a pump to pump out the air inside the battery, put it in a vacuum state, fill it with 99.8% carbon dioxide gas, keep the pressure in the battery case at 0.1MPa, seal it, and the battery is completed.

[0041] In order to check the safety of the lithium ion battery produced by the method of the present invention, acupuncture experiments were performed on the lithium ion battery. figure 2 It is the effect diagram after acupuncture of the lithium ion battery of the present invention, image 3 It is the rendering of traditional lithium-ion battery after acupuncture. S...

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Abstract

The invention discloses a high-safety lithium ion battery and a manufacturing method thereof. The manufacturing method comprises the following steps of manufacturing one or more single cells of a soft-package lithium ion battery, putting the one or more single cells of the soft-package lithium ion battery into a battery case, carrying out sealing, extracting air in the battery by a pump so that a vacuum state is obtained, filling the battery with inert gas so that positive pressure in the battery is kept, and carrying out sealing. The invention provides the high-safety lithium ion battery of which the positive pressure is kept by inert gas filling and the manufacturing method thereof so that safety hidden troubles such as combustion even blast caused by battery system destroy-caused external oxygen penetration into the battery are thoroughly avoided and battery safety is greatly improved.

Description

technical field [0001] The invention relates to a high-safety lithium-ion battery and a manufacturing method thereof, in particular to a lithium-ion battery which is inflated to maintain a positive pressure, and belongs to the technical field of lithium-ion batteries. Background technique [0002] Due to the advantages of high energy density, high output voltage, long cycle life, and low environmental pollution, lithium-ion batteries have been widely used in small digital electronic products, and have broad application prospects in electric vehicles, aerospace and other fields. However, in recent years, there have been frequent reports of fires and even explosions caused by lithium-ion batteries, and the safety of lithium-ion batteries has aroused widespread concern. The safety accidents of lithium-ion batteries are mainly caused by the chemical reaction between the electrodes and the electrolyte. The solvent of the electrolyte is an organic carbonate compound, which has hi...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/42
CPCH01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 王继辉
Owner XIAMEN CHL NEW ENERGY
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