# US 12,119,466 B2 · Battery pack manufacturing method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,466 B2 - Document ID: US12119466B2 - Status: Granted - Kind: B2 - Application number: 17/267,694 - Filed: 2020-01-06 - Published: 2021-10-21 - Granted: 2024-10-15 - Earliest claimed: 2019-01-10 - Assignees: LG Energy Solution, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Gwan Woo Kim - Web page: https://patentgrep.com/patent/US12119466B2 ## CPC - G06T 7/13: Edge detection - H01M 10/653: characterised by electrically insulating or thermally conductive materials - G01B 11/02: for measuring length, width or thickness (G01B11/08 takes precedence) - G06T 7/60: Analysis of geometric attributes - H01M 10/613: Cooling or keeping cold - H01M 10/625: Vehicles - H01M 10/647: Prismatic or flat cells, e.g. pouch cells - H01M 10/6551: Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings - H01M 10/6554: Rods or plates - H01M 10/658: by thermal insulation or shielding - H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/293: characterised by the material - H01M 50/553: Terminals adapted for prismatic, pouch or rectangular cells - G06T 2207/10121: Fluoroscopy - G06T 2207/30108: Industrial image inspection - Y02E 60/10: Energy storage using batteries - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A battery pack manufacturing method includes (a) stacking battery cells to form a cell stack, (b) coupling the cell stack and a U-frame to each other, (c) measuring the volume of the space between a flat plate coupled to the U-frame and the cell stack, and (d) applying a polymer resin corresponding in amount to the volume measured in step (c). ## Claims ### Claim 1 A battery pack manufacturing method comprising: (a) stacking battery cells to form a cell stack; (b) coupling the cell stack and a U-frame to each other; (c) measuring a volume of a space bounded in a height dimension by a lower surface of the cell stack and a flat plate coupled to free ends of opposing sidewalls of the U-frame, the space bounded in a width dimension by the opposing sidewalls of the U-frame, and the space bounded in a length dimension by end plates coupled to opposing ends of the U-frame in the length dimension; and (d) applying an amount of a polymer resin to fill the volume measured in step (c). ### Claim 2 (depends on 1) The battery pack manufacturing method according to claim 1, wherein step (d) comprises applying the polymer resin to an inner surface of the flat plate. ### Claim 3 (depends on 1) The battery pack manufacturing method according to claim 1, wherein step (c) comprises determining a contour of the lower surface of the cell stack using a fluoroscopic imaging apparatus. ### Claim 4 (depends on 3) The battery pack manufacturing method according to claim 3, wherein step (c) comprises: (i) capturing positions of a maximum protrusion and a minimum protrusion of the lower surface of the cell stack; and (ii) calculating a protruding length tolerance between the maximum protrusion and the minimum protrusion. ### Claim 5 (depends on 1) The battery pack manufacturing method according to claim 1, wherein step (c) comprises measuring a length from a determined contour of the lower surface of the cell stack to the free ends of the U-frame. ### Claim 6 (depends on 1) The battery pack manufacturing method according to claim 1, wherein step (c) comprises: (i) measuring a plurality of lengths between the flat plate and the lower surface of the cell stack to calculate a correction length (Z′); and (ii) multiplying the correction length (Z′) by an area of the lower surface of the cell stack. ### Claim 7 (depends on 6) The battery pack manufacturing method according to claim 6, wherein the correction length (Z′) is an average of a maximum value and a minimum value calculated by using a tolerance range based on the plurality of lengths between the flat plate and the lower surface of the cell stack, defined by the following formula: Z′=(M0+M1−M2) wherein M0 indicates a distance between a maximum protrusion and a minimum protrusion of the lower surface of the cell stack, M1 indicates a length from the maximum protrusion of the lower surface of the cell stack to the free ends of the opposing sidewalls of the U-frame, and M2 indicates a dimension between a portion of the flat plate opposed to the lower surface of the cell stack, to which the polymer resin is applied, and a portion of the flat plate to which the free ends of the U-frame are coupled, wherein, when M0 and M1 have a minimum tolerance according to the tolerance range and M2 has a maximum tolerance according to the tolerance range, Z′ indicates the minimum value, and wherein, when M0 and M1 have a maximum tolerance according to the tolerance range and M2 has a minimum tolerance according to the tolerance range, Z′ indicates the maximum value. ### Claim 8 (depends on 1) The battery pack manufacturing method according to claim 1, wherein step (b) comprises: (i) coupling the U-frame and the cell stack to each other such that the U-frame wraps around an upper surface and a side surface of the cell stack, and (ii) disposing the cell stack coupled to the U-frame such that a base of the U-frame faces a ground surface. ### Claim 9 (depends on 1) The battery pack manufacturing method according to claim 1, further comprising (e) welding the U-frame and the flat plate to each other. ### Claim 10 (depends on 9) The battery pack manufacturing method according to claim 9, wherein the welding is performed with the flat plate disposed in contact with the free ends of the U-frame by pushing the flat plate downwards. ### Claim 11 (depends on 10) The battery pack manufacturing method according to claim 10, wherein the pushing of the flat plate downwards comprises compressing the U-frame in a direction in which a first sidewall and a second sidewall of the opposing sidewalls of the U-frame face each other. ### Claim 12 (depends on 1) The battery pack manufacturing method according to claim 1, wherein the polymer resin is a thermally conductive polymer resin. ### Claim 13 (depends on 1) The battery pack manufacturing method according to claim 1, wherein step (c) comprises determining a contour of the lower surface of the cell stack.