# US 8,785,025 B2 · Air-cooled battery pack > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,785,025 B2 - Document ID: US8785025B2 - Status: Granted - Kind: B2 - Application number: 12/929,498 - Filed: 2011-01-28 - Published: 2012-01-12 - Granted: 2014-07-22 - Earliest claimed: 2010-07-06 - Assignees: Samsung SDI Co., Ltd.; Robert Bosch GmbH - Applicants: Kwon Sohn - Inventors: Kwon Sohn - Web page: https://patentgrep.com/patent/US8785025B2 ## CPC - H01M 10/6563: with forced flow, e.g. by blowers - H01M 10/613: Cooling or keeping cold - H01M 10/625: Vehicles - H01M 10/647: Prismatic or flat cells, e.g. pouch cells - H01M 10/6557: arranged between the cells - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - 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 battery pack includes first and second battery cells, a first duct, the first duct having an inlet at a first end and an inclined surface at a second end opposite the first end, and a main body, the main body being connected to the first duct and encompassing the first and second battery cells. The inclined surface may have a first edge and a second edge opposite the first edge, the first edge being adjacent to the battery cells, the inclined surface being inclined such that the second edge is closer to the inlet than the first edge is, and a gap may be between the first and second battery cells, the gap providing a passage for a heat transfer medium to flow from the first duct between the first and second battery cells. ## Claims ### Claim 1 A battery pack, comprising: first and second battery cells; a first duct, the first duct having an inlet at a first end and an inclined surface at a second end opposite the first end; and a main body, the main body being connected to the first duct and encompassing the first and second battery cells, wherein: the inclined surface has a first edge and a second edge opposite the first edge, the first edge being adjacent to the battery cells, the inclined surface being inclined such that the second edge is closer to the inlet than the first edge is, a gap is between the first and second battery cells, the gap providing a passage for a heat transfer medium to flow from the first duct between the first and second battery cells, the first and second battery cells are stacked in a first direction, and the first duct includes inclined side surfaces, the inclined side surfaces each having a first edge extending in parallel with the first direction and a second edge extending in parallel with the first direction, the first edges being adjacent the battery cells, the inclined side surfaces being inclined towards each other such that the second edges are closer to each other than the first edges are. ### Claim 2 (depends on 1) The battery pack as claimed in claim 1, further comprising a second duct, the second duct having an outlet, wherein the first and second battery cells are between the first duct and the second duct. ### Claim 3 (depends on 1) The battery pack as claimed in claim 1, further comprising a heat sink between the first and second battery cells. ### Claim 4 (depends on 3) The battery pack as claimed in claim 3, wherein the gap is defined by a trench in the heat sink. ### Claim 5 (depends on 1) The battery pack as claimed in claim 1, further comprising a second duct, the second duct having an outlet, wherein: the first and second battery cells are between the first duct and the second duct, the second duct has a first end and a second end opposite the first end, the outlet being at the second end, and the second duct has an inclined surface at the first end, the inclined surface of the second duct having a first edge and a second edge opposite the first edge, the first edge being adjacent to the battery cells, the inclined surface of the second duct being inclined such that the second edge is closer to the outlet than the first edge is. ### Claim 6 (depends on 5) The battery pack as claimed in claim 5, wherein the second duct includes inclined side surfaces, the inclined side surfaces of the second duct each having a first edge extending in the first direction and a second edge extending in the first direction, the first edges being adjacent the battery cells, the inclined side surfaces being inclined towards each other such that the second edges are closer to each other than the first edges are. ### Claim 7 (depends on 6) The battery pack as claimed in claim 6, wherein: the first duct extends in a horizontal direction, and the first duct is above the second duct. ### Claim 8 (depends on 5) The battery pack as claimed in claim 5, further comprising a support surface between the main body and one of the first and second ducts, the support surface supporting the first and second battery cells. ### Claim 9 (depends on 8) The battery pack as claimed in claim 8, wherein the support surface includes a hole penetrating therethrough, the hole being aligned with the gap and being configured to allow flow of the heat transfer medium from the gap to the outlet. ### Claim 10 (depends on 1) The battery pack as claimed in claim 1, wherein: the first duct includes a first surface, the second edge of the inclined surface of the first duct being an edge of the first surface, the first duct includes an air guide vane extending from the first surface toward the batteries, and the air guide vane is spaced apart from the batteries such that the heat transfer medium can flow between the batteries and the air guide vane. ### Claim 11 (depends on 10) The battery pack as claimed in claim 10, wherein the first surface is an outer surface of the first duct. ### Claim 12 (depends on 10) The battery pack as claimed in claim 10, wherein the air guide vane has a width less than that of the first surface. ### Claim 13 (depends on 10) The battery pack as claimed in claim 10, wherein the first duct includes a plurality of air guide vanes extending from the first surface toward the batteries. ### Claim 14 (depends on 1) The battery pack as claimed in claim 1, wherein: the first and second battery cells are included in a first set of battery cells stacked together and extending in the first direction, and the battery pack includes a second set of battery cells next to the first set, the first duct being in flow communication with each of the first and second sets of battery cells. ### Claim 15 (depends on 14) The battery pack as claimed in claim 14, further comprising: a second duct, the second duct having an outlet, wherein the first and second battery cells are between the first duct and the second duct; and a support surface between the main body and one of the first and second ducts, the support surface supporting the first and second battery cells, wherein: the first duct extends in the first direction, the first direction being horizontal, and the second duct includes inclined side surfaces, the inclined side surfaces of the second duct each having a first edge extending in the first direction and a second edge extending in the first direction, the first edges being adjacent the battery cells, the inclined side surfaces being inclined towards each other such that the second edges are closer to each other than the first edges are. ### Claim 16 A vehicle, comprising: a power source, the power source providing a motive power for the vehicle; and a battery pack configured to provide electricity to the power source, the battery pack including: first and second battery cells; a first duct, the first duct having an inlet at a first end and an inclined surface at a second end opposite the first end; and a main body, the main body being connected to the first duct and encompassing the first and second battery cells, wherein: the inclined surface has a first edge and a second edge opposite the first edge, the first edge being adjacent to the battery cells, the inclined surface being inclined such that the second the second edge is closer to the inlet than the first edge is, a gap is between the first and second battery cells, the gap providing a passage for a heat transfer medium to flow from the first duct between the first and second battery cells, the first and second battery cells are stacked in a first direction, and the first duct includes inclined side surfaces, the inclined side surfaces each having a first edge extending in parallel with the first direction and a second edge extending in parallel with the first direction, the first edges being adjacent the battery cells, the inclined side surfaces being inclined towards each other such that the second edges are closer to each other than the first edges are. ### Claim 17 (depends on 16) The vehicle as claimed in claim 16, wherein the battery pack further includes a second duct, the second duct having an outlet, wherein the first and second battery cells are between the first duct and the second duct. ### Claim 18 (depends on 16) The vehicle as claimed in claim 16, wherein the battery pack further includes a heat sink between the first and second battery cells. ### Claim 19 (depends on 18) The vehicle as claimed in claim 18, wherein the gap is defined by a trench in the heat sink.