CN-121983692-A - Solid-state battery cell module and vehicle with same

Abstract

The embodiment of the application provides a solid-state battery cell module and a vehicle with the same, and relates to the technical field of solid-state batteries. The solid battery cell module comprises a cell and an adsorption film, wherein the cell comprises a winding core and a tab, the winding core is stacked to form a cell stack, the tab is connected with the cell stack, the adsorption film is connected with the cell stack and is attached to the outer surface of the cell stack, the adsorption film is arranged along the circumferential extension of the cell stack, the adsorption film at least comprises a gas adsorption layer, and the gas adsorption layer is used for adsorbing gas generated in the charging and discharging processes of the cell. The technical problem that byproducts of the solid-state battery cell module cannot be absorbed in time in the prior art is solved.

Inventors

• CUI HAN
• WEN PENGCHAO
• WANG ZHOU
• XU CHENGJIE
• Ruan guangyu
• CHEN YUANGUO
• KONG SHAOFENG

Assignees

• 奇瑞汽车股份有限公司

Dates

Publication Date

20260505

Application Date

20260122

Claims (10)

1. 1. A solid state battery cell module comprising: The battery cell (10), the battery cell (10) comprises a winding core and a tab (11), the winding core is stacked to form a galvanic pile (12), and the tab (11) is connected with the galvanic pile (12); the adsorption membrane (20), adsorption membrane (20) with pile (12) are connected, adsorption membrane (20) laminating set up in pile (12) surface, adsorption membrane (20) are followed the circumference of pile (12) extends and sets up, adsorption membrane (20) include gaseous adsorbed layer (21) at least, gaseous adsorbed layer (21) are used for adsorbing the gas that electricity core (10) charge and discharge in-process produced.
2. 2. The solid state battery cell module according to claim 1, wherein the adsorption film (20) comprises a functional reaction layer (22), the functional reaction layer (22) being connected to the gas adsorption layer (21), the functional reaction layer (22) being arranged on at least one side of the gas adsorption layer (21).
3. 3. The solid state battery cell module according to claim 2, wherein the functional reaction layer (22) is one layer, and one side of the functional reaction layer (22) is connected to the outer surface of the gas adsorption layer (21).
4. 4. A solid state battery cell module according to claim 2 or 3, wherein the functional reaction layer (22) is at least two layers, at least one layer of the functional reaction layer (22) is arranged on the side of the gas adsorption layer (21) facing the side of the battery cell (10), and at least one layer of the functional reaction layer (22) is arranged on the side of the gas adsorption layer (21) away from the side of the battery cell (10), wherein the functional reaction layers (22) on the same side as the gas adsorption layer (21) are connected.
5. 5. A solid state battery cell module according to claim 2 or 3, characterized in that the gas adsorption layer (21) is provided with at least two functional reaction layers (22) on the side facing the battery cell (10), or that the gas adsorption layer (21) is provided with at least two functional reaction layers (22) on the side facing away from the battery cell (10), adjacent two functional reaction layers (22) being connected to each other.
6. 6. The solid-state battery cell module according to any one of claims 1 to 3, wherein the gas adsorption layer (21) is made of a polymer material, and wherein the gas adsorption layer (21) is at least one of polyethylene terephthalate, polypropylene, polyethylene, polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl chloride, chlorinated polyethylene, chlorosulfonated polyethylene, plasticized polyolefin, ethylene-propylene rubber, neoprene, butene rubber, thermoplastic synthetic rubber, and chlorohydrin rubber.
7. 7. A solid state battery cell module according to claim 2 or 3, wherein the functional reaction layer (22) is at least one of activated carbon, zeolite, silica gel, metal organic framework, clay mineral, copper oxide, iron oxide, zinc oxide, calcium oxide, magnesium oxide, manganese oxide, lead oxide, silver oxide, aluminum oxide, vanadium pentoxide, ferric oxide, manganese dioxide, iron sulfide, zinc sulfide, cadmium sulfide, lead sulfide, cuprous sulfide.
8. 8. A solid state battery cell module according to claim 2 or 3, wherein the gas adsorption layer (21) and the functional reaction layer (22) are different in porosity, and/or the porosity of each functional reaction layer (22) is different when the functional reaction layer (22) is two or more layers.
9. 9. A solid state battery cell module according to any of claims 1-3, characterized in that the cell module further comprises an adhesive member (30), the adhesive member (30) being connected to the adsorption film (20), the adhesive member (30) being arranged at the outer surface of the adsorption film (20).
10. 10. A vehicle, characterized in that the vehicle has a solid state battery cell stack, the solid-state battery cell module according to any one of the preceding claims 1-9.

Description

Solid-state battery cell module and vehicle with same Technical Field The embodiment of the application relates to the technical field of solid-state batteries, in particular to a solid-state battery cell module and a vehicle with the same. Background Sulfide electrolytes are susceptible to hydrolysis reactions due to the inclusion of elemental sulfur in their chemical structure, particularly when contacted with moisture or oxygen in air, to produce toxic gases such as sulfur dioxide, phosphine, biphosphine, and hydrogen sulfide (H 2 S) gases. Hydrogen sulfide is not only a toxic gas, which threatens the operation environment and personnel safety, but also causes electrolyte degradation during the generation process, thereby affecting the stability and cycle performance of the battery. The release of hydrogen sulfide can also corrode the cell components, especially when in contact with the cell electrode material and the packaging material, resulting in a substantial reduction in the overall life of the cell. Some sulfide electrolytes (such as Li 3PS4) may release phosphine or diphosphane in addition to H 2 S when reacted with water in the air. These gases are not only toxic, but also spontaneously combustible in air, with the risk of causing a fire or explosion. In addition to the predominant H 2 S gas, sulfide solid state electrolytes also produce other sulfur-containing toxic gases, such as small amounts of sulfur dioxide, which are also irritating and toxic. By-product gases (sulfur dioxide, phosphine, biphosphine, hydrogen sulfide (H 2 S), etc.) generated by side reactions of the sulfide electrolyte may cause interface degradation of the solid electrolyte and the electrode material, thereby increasing interface resistance. The presence of the by-product gas not only initiates chemical degradation of the electrolyte, but may also form unstable intermediates, disrupting the desired contact between the electrolyte and the electrode. The loss of battery performance due to poor interfaces is a major challenge in commercialization of solid state batteries, particularly sulfide-based solid state batteries. Besides the degradation of battery performance, most byproducts are volatile toxic gases, which constitutes a great hidden trouble for environmental safety. In the process of manufacturing, transporting and using the battery, if a certain air leakage phenomenon exists, environmental pollution and health hazard to human body can be caused. There is currently no good solution to the above problems. Disclosure of Invention The embodiment of the application provides a solid-state battery cell module and a vehicle with the same, which at least solve the technical problem that byproducts of the solid-state battery cell module in the prior art cannot be absorbed in time. In order to achieve the above object, according to one aspect of the embodiment of the present application, there is provided a solid-state battery cell module, including a cell and an adsorption film, the cell including a winding core and a tab, the winding core being stacked to form a cell stack, the tab being connected to the cell stack, the adsorption film being disposed on an outer surface of the cell stack in a bonded manner, the adsorption film being disposed to extend in a circumferential direction of the cell stack, the adsorption film including at least a gas adsorption layer for adsorbing a gas generated during charging and discharging of the cell. Further, the adsorption film comprises a functional reaction layer, the functional reaction layer is connected with the gas adsorption layer, and the functional reaction layer is arranged on at least one side of the gas adsorption layer. Further, the functional reaction layer is one layer, and one side of the functional reaction layer is connected with the outer surface of the gas adsorption layer. Further, the functional reaction layer is at least two layers, one side of the gas adsorption layer, which faces the side of the battery cell, is provided with at least one functional reaction layer, and one side of the gas adsorption layer, which is far away from the side of the battery cell, is provided with at least one functional reaction layer, wherein the functional reaction layers on the same side of the gas adsorption layer are connected. Further, one side of the gas adsorption layer facing the battery core is provided with at least two functional reaction layers, or one side of the gas adsorption layer far away from the battery core is provided with at least two functional reaction layers, and the adjacent two functional reaction layers are connected with each other. Further, the gas adsorption layer is made of a high polymer material, wherein the gas adsorption layer is at least one of polyethylene terephthalate, polypropylene, polyethylene, polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl chloride, chlorinated polyethylene, chlorosulfonated polyethylene, plasticized polyolefin