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A solid-state battery, battery module, battery pack and related devices

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

Active Publication Date: 2021-03-26
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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  • A solid-state battery, battery module, battery pack and related devices
  • A solid-state battery, battery module, battery pack and related devices
  • A solid-state battery, battery module, battery pack and related devices

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 present invention provides a solid-state battery, a battery module, a battery pack and related devices, wherein the sulfide electrolyte layer and at least one polymer electrolyte layer disposed on the surface of the sulfide electrolyte layer, and the solid electrolyte satisfies 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 is greater than or equal to 84.2−80.2×w. The polymer electrolyte layer with an appropriate thickness of the present invention can not only improve the interfacial infiltration effect between the current sulfide electrolyte layer and the electrode, but also not seriously reduce the overall energy density of the battery, and greatly overcome the problem of the sulfide electrolyte in the solid state. The application defects in the battery improve the cycle performance and safety performance of the solid-state battery.

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 Patents(China)
IPC IPC(8): H01M10/056H01M10/0525
CPCH01M10/056H01M10/0525H01M2220/20H01M2300/0065H01M2300/0094Y02P70/50H01M2300/0082H01M10/0585H01M2300/0068H01M10/0562H01M10/0565
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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