# US 12,218,378 B2 · Battery, electric device, manufacturing method and manufacturing system for battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,218,378 B2 - Document ID: US12218378B2 - Status: Granted - Kind: B2 - Application number: 17/976,744 - Filed: 2022-10-28 - Published: 2023-02-16 - Granted: 2025-02-04 - Earliest claimed: 2020-09-14 - Assignees: Contemporary Amperex Technology (Hong Kong) Limited - Applicants: Contemporary Amperex Technology (Hong Kong) Limited - Inventors: Yuqun Zeng; Liwen Jiang; Wumei Fang - Web page: https://patentgrep.com/patent/US12218378B2 ## CPC - H01M 50/367: Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems - H01M 50/143: Fireproof; Explosion-proof - H01M 50/169: by welding, brazing or soldering - H01M 50/342: Non-re-sealable arrangements - H01M 50/358: External gas exhaust passages located on the battery cover or case - H01M 50/578: in response to pressure - H01M 50/581: in response to temperature - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract This disclosure provides a battery, an electric device, a manufacturing method and a manufacturing system for the battery. The battery includes a battery module, a casing, and a flow guide member. The battery module includes an explosion-proof assembly. The casing accommodates the battery module. The casing includes a gas discharge passage. The gas discharge passage includes a gas inlet and a gas outlet. The flow guide member is disposed inside the casing and shields the explosion-proof assembly to form a gas guide passage. The gas guide passage is in communication with the gas inlet, for guiding gas generated by the battery module to an exterior of the casing through the gas outlet after the explosion-proof assembly is destroyed. This disclosure intends to solve the technical problem of use safety of the battery being seriously affected due to the battery being prone to catching fire quickly and then exploding. ## Claims ### Claim 1 A battery, comprising: a battery module comprising an explosion-proof assembly; a casing, which is configured to accommodate the battery module, the casing comprising a gas discharge passage, and the gas discharge passage comprising a gas inlet and a gas outlet; a flow guide member, which is disposed inside the casing and shields the explosion-proof assembly to form a gas guide passage, the gas guide passage being in communication with the gas inlet, for guiding gas generated by the battery module to an exterior of the casing through the gas outlet after the explosion-proof assembly is destroyed, wherein: the casing comprises a cover and a housing for accommodating the battery module, the housing comprises two side plates to which the cover is connected; an accommodating portion is formed at a connection position between the cover and one of the two side plates, the gas discharge passage is disposed in the one of the two side plates, and the gas inlet of the gas discharge passage is in communication with the accommodating portion; and the one of the two side plates comprises an upper portion, a first side portion, and a second side portion, the first side portion and the second side portion are each connected to the upper portion and are spaced apart from each other in a thickness direction of the one of the two side plates, the second side portion is disposed away from the battery module relative to the first side portion, the gas inlet of the gas discharge passage is disposed to penetrate the upper portion, and the gas outlet of the gas discharge passage is disposed to penetrate the second side portion; and the accommodating portion is formed above the gas inlet of the gas discharge passage and communicates the gas guide passage with the gas inlet of the gas discharge passage such that a gas exchange between the gas guide passage and the gas inlet of the gas discharge passage occurs at the accommodating portion. ### Claim 2 (depends on 1) The battery as claimed in claim 1, wherein the gas guide passage is enclosed and formed by the flow guide member and the battery module, and the explosion-proof assembly is located in the gas guide passage. ### Claim 3 (depends on 1) The battery as claimed in claim 1, wherein the battery module comprises a connecting piece comprising a gas flow passage, the connecting piece is configured to be connected with the flow guide member, and the gas guide passage is communication with the gas inlet through the gas flow passage. ### Claim 4 (depends on 2) The battery as claimed in claim 2, wherein the battery module comprises a connecting piece comprising a gas flow passage, the connecting piece is configured to be connected with the flow guide member, and the gas guide passage is communication with the gas inlet through the gas flow passage. ### Claim 5 (depends on 1) The battery as claimed in claim 1, wherein the battery module comprises a connecting piece comprising a gas flow passage, the connecting piece and the flow guide member are integrally formed, and the gas guide passage is communication with the gas inlet through the gas flow passage. ### Claim 6 (depends on 5) The battery as claimed in claim 5, wherein the explosion-proof assembly is disposed facing the cover, and the flow guide member is configured to be connected with the cover. ### Claim 7 (depends on 6) The battery as claimed in claim 6, wherein at least a portion of the connecting piece is located within the accommodating portion. ### Claim 8 (depends on 7) The battery as claimed in claim 7, wherein the two side plates are spaced from each other, the battery module is arranged between the two side plates, and the gas guide passage extends from one of the two side plates towards the other of the two side plates. ### Claim 9 (depends on 7) The battery as claimed in claim 7, wherein a number of the battery module is the same as a number of the flow guide member, and one battery module is provided correspondingly with one flow guide member, for guiding gas generated after the explosion-proof assembly of each battery module is destroyed. ### Claim 10 (depends on 9) The battery as claimed in claim 9, wherein the gas discharge passage further comprises a confluence chamber, the gas inlet and the gas outlet are each in communication with the confluence chamber, a number of the gas inlet is equal to a number of the flow guide member, and one gas inlet is in communication with one gas flow passage. ### Claim 11 (depends on 7) The battery as claimed in claim 7, wherein a sealing member is disposed between the flow guide member and the battery module to seal the gas guide passage such that the gas flows to the gas inlet along the gas guide passage. ### Claim 12 (depends on 1) The battery as claimed in claim 1, wherein the battery further comprises a pressure relief valve, the pressure relief valve is disposed on the second side portion of the one of the two side plates and covers the gas outlet, the pressure relief valve is configured to be actuated to relieve pressure when pressure or temperature within the gas discharge passage reaches a threshold value. ### Claim 13 (depends on 1) An electric device comprising the battery as claimed in claim 1 for providing electrical energy. ### Claim 14 (depends on 1) The battery as claimed in claim 1, wherein the flow guide member comprises a first plate and two or more second plates, the first plate shields the explosion-proof assembly, the two or more second plates extend from the first plate toward the battery module, respectively, and the gas guide passage is enclosed and formed by the first plate, the two or more second plates, and the battery module. ### Claim 15 (depends on 14) The battery as claimed in claim 14, wherein the first plate is detachably connected to the casing or the first plate is welded to the casing. ### Claim 16 (depends on 1) The battery as claimed in claim 1, wherein a sealing member is disposed between the battery module and the one of the two side plates.