# US 2024/0204342 A1 · Methods and systems for burst valve battery cell ventilation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0204342 A1 - Document ID: US20240204342A1 - Status: Published application - Kind: A1 - Application number: 18/066,566 - Filed: 2022-12-15 - Published: 2024-06-20 - Earliest claimed: 2022-12-15 - Applicants: Polestar Performance AB - Inventors: Jens GROOT; Ben RAILTON; Niklas Roos - Web page: https://patentgrep.com/patent/US20240204342A1 ## CPC - H01M 50/367: Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems - H01M 10/658: by thermal insulation or shielding - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/271: Lids or covers for the racks or secondary casings - H01M 50/30: Arrangements for facilitating escape of gases - H01M 50/325: comprising deformable valve members, e.g. elastic or flexible valve members - 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 Various embodiments disclosed herein relate to systems and methods for battery cell ventilation. A corrugated battery module lid may be integrated above a battery cell module, wherein the corrugated lid includes a plurality of crests and troughs to form one or more gas emission channels. The plurality of crests and troughs may be at least partially positioned to encompass at least one of the plurality of battery cells to form enclosures. The enclosures may accumulate a maximum amount of gas pressure from a gas emitted by the at least one of the plurality of battery cells. One or more pressure release mechanisms may be associated with the plurality of enclosures and integrated with the battery module lid. In response to the enclosure exceeding the maximum amount of gas pressure, the gas may be automatically released through the pressure release mechanisms and flow though the channels between the crests. ## Claims ### Claim 1 A system for battery cell ventilation comprising: a plurality of battery cells integrated together as a battery cell module; a corrugated battery module lid integrated above the battery cell module, wherein the corrugated lid includes a plurality of crests and troughs to form one or more gas emission channels; the plurality of crests and troughs at least partially positioned to encompass at least one of the plurality of battery cells to form a plurality of enclosures associated with one or more battery cells, wherein the plurality of enclosures accumulate a maximum amount of gas pressure from a gas emitted by the one of the plurality of battery cells; one or more pressure release mechanisms associated with the plurality of enclosures and integrated with the battery module lid; and in response to the enclosure exceeding the maximum amount of gas pressure, automatically release the accumulated gas through the pressure release mechanisms, wherein the gas is directed through the one or more gas emission channels between the plurality of crests. ### Claim 2 (depends on 1) The system for battery cell ventilation of claim 1, wherein a plurality of strips, constructed of a thermal barrier material, covers the one or more pressure release mechanisms, wherein, in response to the automatic gas release, the plurality of strips at least partially separate from the one or more pressure release mechanisms to permit single directional gas flow through the one or more emission channels. ### Claim 3 (depends on 2) The system for battery cell ventilation of claim 2, wherein the thermal barrier material is constructed of mica. ### Claim 4 (depends on 2) The system for battery cell ventilation of claim 2, wherein the strip of thermal barrier material is integrated into a ventilation hole of each one of the plurality of cells to release the accumulated gas into the one or more gas emission channels. ### Claim 5 (depends on 2) The system for battery cell ventilation of claim 2, wherein the one or more pressure release mechanisms include an elongated slit across the battery module lid and, as a result of exceeding the maximum amount of gas pressure, is temporarily deformed along the elongated slit to release the gas pressure. ### Claim 6 (depends on 5) The system for battery cell ventilation of claim 5, wherein as the battery module lid temporarily deforms, separated between the elongated slit, pressure resulting from the deformation provides additional sealing pressure on a pressure release mechanism of a neighboring cell. ### Claim 7 (depends on 5) The system for battery cell ventilation of claim 5, wherein the elongated slits extend across at least one of the plurality of crests or the plurality of troughs. ### Claim 8 (depends on 5) The system for battery cell ventilation of claim 5, wherein the elongated slits extend across the battery module lid between the plurality of crests and the plurality of troughs. ### Claim 9 A method for battery cell ventilation comprising: integrating a corrugated battery module lid with a battery cell module such that a plurality of crests and a plurality of troughs, at least partially, overlap at least one of a plurality of battery cells integrated into the battery cell module forming a plurality of enclosures among the plurality of cells; accumulating a gas within one or more of the plurality of enclosures during a thermal runaway event; exceeding a maximum of amount of gas pressure within the enclosures associated with the one or more battery cells experiencing the thermal runaway event; releasing, automatically, the accumulated gas through one or more pressure release mechanisms integrated into the corrugated battery module lid and directing the gas outward of the battery cell module through one or more channels between the plurality of crests. ### Claim 10 (depends on 9) The method for battery ventilation of claim 9, further comprising integrating a plurality of strips, constructed of a thermal barrier material, and covering one or more of the pressure release mechanisms with the strips such that releasing the accumulated gas at least partially separates from the pressure release valves directing the gas outward through the one or more channels. ### Claim 11 (depends on 10) The method for battery ventilation of claim 10, further comprising constructing the thermal barrier material with mica. ### Claim 12 (depends on 10) The method for battery ventilation of claim 10, wherein the one or more pressure release mechanisms include integrating one or more elongated slits across the battery module lid; and deforming, temporarily, the one or more elongated slits, associated with the one or more battery cells experiencing the thermal runaway event. ### Claim 13 (depends on 12) The method for battery ventilation of claim 12, further comprising providing additional sealing pressure onto an elongated slit of a neighboring cell, further sealing the elongated slit, during the thermal runaway event. ### Claim 14 (depends on 12) The method for battery cell ventilation of claim 12, further comprising extending the elongated slit across the at least one of the plurality of crests or the plurality of troughs. ### Claim 15 (depends on 12) The method for battery cell ventilation of claim 12, further comprising extending the one or more pressure release mechanisms across the at least one of the plurality of crests or the plurality of troughs.