# US 2025/0167367 A1 · Battery Module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0167367 A1 - Document ID: US20250167367A1 - Status: Published application - Kind: A1 - Application number: 18/945,803 - Filed: 2024-11-13 - Published: 2025-05-22 - Earliest claimed: 2023-11-16 - Assignees: SK On Co., Ltd. - Applicants: SK On Co., Ltd. - Inventors: Seo Roh RHEE; Sung Min HONG; Dong Jin KIM; Seung Dong LEE; Ji Hoon LIM - Web page: https://patentgrep.com/patent/US20250167367A1 ## CPC - H01M 10/0481: {Compression means other than compression means for stacks of electrodes and separators} - H01M 50/242: adapted for protecting batteries against vibrations, collision impact or swelling - H01M 10/613: Cooling or keeping cold - H01M 10/625: Vehicles - H01M 10/647: Prismatic or flat cells, e.g. pouch cells - H01M 10/653: characterised by electrically insulating or thermally conductive materials - H01M 10/6551: Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings - H01M 10/6554: Rods or plates - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/211: adapted for pouch cells - H01M 50/289: characterised by spacing elements or positioning means within frames, racks or packs (spacing elements inside cells other than separators, membranes or diaphragms H01M50/471) - H01M 50/291: characterised by their shape - H01M 50/293: characterised by the material - H01M 50/502: Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing - 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 battery module in which the lifespan, displacement, voltage, capacity, etc. of each battery cell constituting the battery module are uniform according to one embodiment of the present disclosure may include: a module case forming an accommodating space; a plurality of battery cells disposed in the accommodating space; a first pad portion disposed between at least one pair of adjacent battery cells among the plurality of battery cells; and a second pad portion disposed between a side wall of the module case and a battery cell closest to the side wall of the module case, where the surface pressure applied by the first pad portion to an adjacent battery cell may be less than the surface pressure applied by the second pad portion to an adjacent battery cell. ## Claims ### Claim 1 A battery module comprising: a plurality of battery cells stacked along a preset stacking direction; a module case forming an accommodating space for accommodating the plurality of battery cells; a first pad portion disposed between at least one pair of adjacent battery cells among the plurality of battery cells; and a second pad portion disposed between a side wall of the module case and a battery cell closest to the side wall of the module case; wherein a surface pressure applied by the first pad portion to an adjacent battery cell is less than a surface pressure applied by the second pad portion to an adjacent battery cell. ### Claim 2 (depends on 1) The battery module according to claim 1, wherein the first pad portion includes a first region and a second region which are different regions on the same plane, and a compression force deflection of each of the first region and the second region is the same. ### Claim 3 (depends on 1) The battery module according to claim 1, wherein the first pad portion includes a first region and a second region which are different regions on the same plane, and a compression set of each of the first region and the second region is the same. ### Claim 4 (depends on 1) The battery module according to claim 1, wherein the second pad portion includes a first region and a second region which are different regions on the same plane, and a compression force deflection of each of the first region and the second region is the same. ### Claim 5 (depends on 1) The battery module according to claim 1, wherein the second pad portion includes a first region and a second region which are different regions on the same plane, and a compression set of each of the first region and the second region is the same. ### Claim 6 (depends on 1) The battery module according to claim 1, wherein a compression force deflection of the first pad portion is smaller than a compression force deflection of the second pad portion. ### Claim 7 (depends on 1) The battery module according to claim 1, wherein a compression set of the first pad portion is smaller than a compression set of the second pad portion. ### Claim 8 (depends on 1) The battery module according to claim 1, wherein a distance between both side surfaces of the first pad portion facing one battery cell among the plurality of battery cells along the stacking direction is longer than a distance between both side surfaces of the second pad portion facing one battery cell among the plurality of battery cells along the stacking direction. ### Claim 9 (depends on 1) The battery module according to claim 1, further comprising: a stacking portion stacked on at least one side surface among both side surfaces of the first pad portion facing one battery cell among the plurality of battery cells along the stacking direction. ### Claim 10 (depends on 1) The battery module according to claim 1, wherein a total volume of the first pad portion and the second pad portion occupies 2% by volume to 7% by volume of the accommodating space. ### Claim 11 (depends on 1) The battery module according to claim 1, wherein each of the plurality of battery cells includes: a main body portion including an electrode assembly storing or generating electrical energy; and an electrode lead electrically connected to the electrode assembly and also protruding from the main body portion to electrically connect the electrode assembly to the outside; wherein each of the first pad portion and the second pad portion is disposed adjacent to the main body portion of the battery cell. ### Claim 12 (depends on 1) The battery module according to claim 1, further comprising: a heat dissipation portion disposed between a bottom surface of the module case and the plurality of battery cells. ### Claim 13 (depends on 1) The battery module according to claim 1, further comprising: a busbar assembly disposed in the accommodating space and electrically connecting the plurality of battery cells to an outside. ### Claim 14 (depends on 1) The battery module according to claim 1, wherein each of the plurality of battery cells, the first pad portion, and the second pad portion is disposed vertically with respect to a bottom surface of the module case. ### Claim 15 A battery module comprising: a plurality of battery groups, each of which is a bundle of a plurality of battery cells; a module case accommodating the plurality of battery groups; a first pad portion disposed between at least one pair of adjacent battery cells among the plurality of battery cells; and a second pad portion disposed between a side wall of the module case and a battery cell closest to the side wall of the module case; wherein a surface pressure applied by the first pad portion to an adjacent battery cell is less than a surface pressure applied by the second pad portion to an adjacent battery cell. ### Claim 16 (depends on 15) The battery module according to claim 15, wherein the other battery group adjacent to the one pair of battery groups between which the first pad portion is disposed is in contact with one battery group among the one pair of battery groups. ### Claim 17 (depends on 15) The battery module according to claim 15, wherein battery cells of the plurality of battery groups are electrically connected in parallel with each other, and the plurality of battery groups are electrically connected in series with each other. ### Claim 18 A battery module comprising: a cell assembly including a plurality of battery cells stacked in a preset stacking direction; a module case accommodating the cell assembly; a first pad portion positioned in at least a part of spaces between the plurality of battery cells; and a second pad portion positioned between the cell assembly and the module case along the stacking direction and formed with a thickness less than or equal to a thickness of the first pad portion based on the stacking direction. ### Claim 19 (depends on 18) The battery module according to claim 18, wherein, when the first pad portion and the second pad portion are formed of the same material, a thickness of the first pad portion and a thickness of the second pad portion are different from each other. ### Claim 20 (depends on 18) The battery module according to claim 18, wherein, when at least one of the plurality of battery cells expands, a volume occupied by the first pad portion and the second pad portion in the accommodating space decreases.