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Solid-state battery, battery module, battery pack and related devices thereof

A solid-state battery and battery module technology, which is applied in the field of battery packs and related devices, solid-state batteries, and battery modules, can solve problems such as flammability, easy leakage of liquid electrolyte, battery fire and explosion, etc. Excellent cycle performance and safety performance, service life and safety performance

Active Publication Date: 2020-11-13
JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Currently, the liquid electrolyte used in commercial lithium-ion batteries is easy to leak and flammable, so energy storage products such as electric vehicles often have huge safety risks, especially with the explosive growth of the new energy industry in recent years. , the news of battery fire and explosion is also endless, so consumers' demand for battery safety is becoming more and more urgent

Method used

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  • Solid-state battery, battery module, battery pack and related devices thereof
  • Solid-state battery, battery module, battery pack and related devices thereof
  • Solid-state battery, battery module, battery pack and related devices thereof

Examples

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preparation example Construction

[0096] (1) Preparation of positive electrode 51

[0097] The cathode active material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , Electrolyte material Li 6 P.S. 5 Cl, conductive agent Super-P, and binder styrene-butadiene rubber are mixed according to a mass ratio of 70:24:3:3, solvent toluene is added, and stirred until the system is uniform under the action of a vacuum mixer to obtain positive electrode slurry; The slurry is uniformly coated on both surfaces of the current collector aluminum foil, dried at room temperature, transferred to an oven for drying, and then subjected to cold pressing and slitting to obtain the positive electrode 51 .

[0098] (2) Preparation of negative electrode 54

[0099] The lithium foil is attached to both surfaces of the current collector copper foil by rolling, and then cut to obtain the negative electrode 54 .

[0100] (3) Preparation of solid electrolyte

[0101] a. Preparation of sulfide electrolyte layer 52

[0102] Mix the sulfide electrolyte ...

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Abstract

The invention provides a solid-state battery, a battery module, a battery pack and related devices thereof. A sulfide electrolyte layer and at least one polymer electrolyte layer are arranged on the surface of the sulfide electrolyte layer, and the solid electrolyte meets the following conditions: the thickness of the sulfide electrolyte layer is greater than or equal to the thickness of the polymer electrolyte layer on one side and greater than or equal to 84.2-80.2*w. According to the polymer electrolyte layer with the proper thickness, the interface infiltration effect between the current sulfide electrolyte layer and the electrode can be improved; and the overall energy density of the battery cannot be seriously reduced, the application defects of sulfide electrolyte in the solid-statebattery are overcome to a great extent, and the cycle performance and the safety performance of the solid-state battery are improved.

Description

technical field [0001] The invention relates to a solid-state battery, a battery module, a battery pack and related devices, belonging to the technical field of batteries. Background technique [0002] Currently, the liquid electrolyte used in commercial lithium-ion batteries is easy to leak and flammable, so energy storage products such as electric vehicles often have huge safety risks, especially with the explosive growth of the new energy industry in recent years. , The news of battery fire and explosion is also endless, so consumers' demand for battery safety is becoming increasingly urgent. Considering that the characteristics of liquid electrolytes are difficult to change, the use of solid electrolytes has become one of the industry-recognized solutions to the safety problems of lithium batteries. While this brings opportunities for the development of the solid-state battery industry, it also poses a severe challenge to further improve the safety performance of solid-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/0525
CPCH01M10/056H01M10/0525H01M2220/20H01M2300/0065H01M2300/0094Y02P70/50H01M10/052H01M2300/0082H01M10/0585H01M2300/0068H01M10/0562H01M10/0565
Inventor 胡波兵刘成勇郭永胜李谦付佳玮程萌
Owner JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED
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