# US 11,909,071 B2 · Vehicle with a high-voltage battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,071 B2 - Document ID: US11909071B2 - Status: Granted - Kind: B2 - Application number: 17/052,260 - Filed: 2019-06-07 - Published: 2021-03-25 - Granted: 2024-02-20 - Earliest claimed: 2018-06-21 - Assignees: Bayerische Motoren Werke Aktiengesellschaft - Applicants: Bayerische Motoren Werke Aktiengesellschaft - Inventors: Robert Lustig; Philip Raettich; Tobias Schmieg; Frank Tenfelde - Web page: https://patentgrep.com/patent/US11909071B2 ## CPC - H01M 50/526: having a layered structure - H01M 10/658: by thermal insulation or shielding - H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells - H01M 50/222: Inorganic material - H01M 50/231: having a layered structure - H01M 50/24: adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658) - H01M 50/249: specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) - H01M 50/342: Non-re-sealable arrangements - H01M 50/502: Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing - H01M 50/522: Inorganic material - 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 A vehicle includes a high-voltage battery which has a housing and at least one battery module arranged in the housing that has multiple battery cells which are electrically connected together via a cell contacting system. Each of the battery cells has a battery cell housing with an emergency degassing opening which opens at a specified cell inner pressure and through which hot or burning gas can be leaked out of the interior of the battery cell housing into the housing of the high-voltage battery in the event of a disruption or damage to individual battery cells. The emergency degassing openings face the cell contacting system and/or a wall of the housing of the high-voltage battery. The cell contacting system and/or the wall of the housing of the high-voltage battery is/are provided with a heat protection layer, at least in the regions in which the emergency degassing openings are arranged. ## Claims ### Claim 1 A vehicle having a battery, comprising: a housing; a battery module arranged in the housing, the battery module having a plurality of battery cells; and a cell contact system that electrically connects the plurality of battery cells to one another, wherein the battery cells each have a battery cell housing with an emergency ventilation opening which opens at a predefined internal cell pressure and through which hot or burning gas is able to escape from an interior of the battery cell housing into the housing of the battery in an event of a fault with or damage to individual battery cells, the emergency ventilation openings face the cell contact system, the cell contact system is provided with a single heat protection layer at least in regions in which the emergency ventilation openings are arranged, and the heat protection layer consists of a heat protection coating. ### Claim 2 (depends on 1) The vehicle according to claim 1, wherein the cell contact system is arranged between the emergency ventilation openings and a wall of the housing of the battery. ### Claim 3 (depends on 1) The vehicle according to claim 1, wherein the cell contact system has an electrically conductive conductive element that is electrically connected to electrodes of a plurality of battery cells and/or a holding element that carries the conductive element, and the heat protection layer is applied to the conductive element. ### Claim 4 (depends on 1) The vehicle according to claim 1, wherein the heat protection layer is an intumescent layer. ### Claim 5 (depends on 1) The vehicle according to claim 1, wherein the heat protection layer is a ceramic layer or a layer containing ceramic particles. ### Claim 6 (depends on 1) The vehicle according to claim 1, wherein the heat protection layer has a layer thickness of at least 0.1 mm. ### Claim 7 (depends on 1) The vehicle according to claim 1, wherein the emergency ventilation openings are closed off in a gastight manner when an internal pressure of the battery cells is less than the predefined internal cell pressure. ### Claim 8 (depends on 1) The vehicle according to claim 1, wherein the emergency ventilation openings are each formed by an intended breaking point that opens when the predefined internal cell pressure is exceeded. ### Claim 9 (depends on 1) The vehicle according to claim 1, wherein the battery cells are arranged such that the emergency ventilation openings face an upper wall, with respect to a direction of gravity, or a cover of the battery. ### Claim 10 (depends on 1) The vehicle according to claim 1, wherein the heat protection layer does not melt and does not burn up to a temperature of 1300° C. ### Claim 11 (depends on 1) The vehicle according to claim 1, wherein the heat protection layer does not melt and does not burn up to a temperature of 1000° C. ### Claim 12 (depends on 1) The vehicle according to claim 1, wherein the heat protection layer is not perforated and not burned by the hot or burning gas that leaks from the battery cells for a duration of 0.5 minutes at a temperature of up to 2000° C. ### Claim 13 (depends on 1) The vehicle according to claim 1, wherein the heat protection layer is not perforated and not burned by the hot or burning gas that leaks from the battery cells for a duration of 0.5 minutes at a temperature of up to 1600° C. ### Claim 14 (depends on 1) The vehicle according to claim 1, wherein the cell contact system has an electrically conductive conductive element that is electrically connected to electrodes of a plurality of battery cells and/or a holding element that carries the conductive element, and the heat protection layer is applied to the holding element.