# US 10,312,478 B2 · Battery pack > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,312,478 B2 - Document ID: US10312478B2 - Status: Granted - Kind: B2 - Application number: 14/605,145 - Filed: 2015-01-26 - Published: 2015-10-22 - Granted: 2019-06-04 - Earliest claimed: 2014-04-16 - Assignees: Samsung SDI Co., Ltd. - Applicants: Samsung SDI Co., Ltd. - Inventors: Jae-Il Seong - Web page: https://patentgrep.com/patent/US10312478B2 ## CPC - H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence) - H01M 50/15: for prismatic or rectangular cells (H01M50/153 takes precedence) - H01M 50/55: on the same side of the cell - H01M 50/553: Terminals adapted for prismatic, pouch or rectangular cells - H01M 50/591: Covers - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - 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 - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A battery pack is disclosed. In one aspect, the battery pack includes an electrode assembly and a case accommodating the electrode assembly, wherein the case includes first and second walls facing each other and respectively concave and convex with respect to the electrode assembly. The battery pack also includes an uneven portion formed on the second wall. ## Claims ### Claim 1 A battery pack comprising: an electrode assembly having an outer side surface, a top and a bottom opposing each other; an electrode plate outwardly extending from the top of the electrode assembly; a case accommodating the electrode assembly, wherein the case includes first and second walls opposing each other, wherein each of the first and second walls has an inner surface and an outer surface opposing each other, wherein the inner surface faces the outer side surface of the electrode assembly, wherein at least a portion of the outer surface of the second wall is uneven, wherein the uneven portion defines a gap between the outer surface of the electrode assembly and the inner surface of the second wall, wherein the uneven portion extends in the width direction of the second wall of the case, wherein the uneven portion comprises a plurality of protrusions and a plurality of recesses alternately formed with respect to each other, wherein each of the protrusions extends in the same direction in which the electrode plate extends, wherein the outer surface of the second wall is configured to be deformed based on pressure applied to the case, wherein the thickness of each of the protrusions and recesses is configured to decrease by stretching in response to the outer surface of the second wall being deformed, wherein each of the first and second walls has a predetermined radius of curvature, and wherein the predetermined radius of curvature of the second wall is greater than the predetermined radius of curvature of the first wall. ### Claim 2 (depends on 1) The battery pack of claim 1, wherein the protrusions and recesses are formed in a center portion of the second wall. ### Claim 3 (depends on 1) The battery pack of claim 1, wherein the protrusions and recesses are symmetrical with respect to the center portion of the second wall. ### Claim 4 (depends on 1) The battery pack of claim 1, wherein the thickness of a center portion of the second wall is less than the thickness of a center portion of the first wall. ### Claim 5 (depends on 1) The battery pack of claim 1, wherein each of the first and second walls has a predetermined radius of curvature, and wherein the predetermined radius of curvature of the second wall is about 200 mm or greater. ### Claim 6 (depends on 5) The battery pack of claim 5, wherein the difference between the predetermined radius of curvature of the first wall and the predetermined radius of curvature of the second wall is in the range from about 10 mm to about 30 mm. ### Claim 7 (depends on 1) The battery pack of claim 1, wherein the electrode assembly is curved along the first and second walls. ### Claim 8 (depends on 7) The battery pack of claim 7, further comprising: a cap plate substantially sealing the electrode assembly inside the case; and an electrode pin located on an upper surface of the cap plate and electrically connected to the electrode assembly. ### Claim 9 (depends on 8) The battery pack of claim 8, wherein the electrode pin has a first polarity, and wherein the cap plate has a second polarity that is different from the first polarity. ### Claim 10 (depends on 9) The battery pack of claim 9, wherein the cap plate comprises a first side corresponding to the first wall and a second side corresponding to the second wall, wherein each of the first and second walls has a predetermined radius of curvature, wherein the first side of the cap plate has substantially the same radius of curvature as the first wall, and wherein the second side of the cap plate has substantially the same radius of curvature as the second wall. ### Claim 11 (depends on 1) The battery pack of claim 1, wherein the second wall includes an even portion, and wherein each of the protrusions protrudes from the even portion. ### Claim 12 (depends on 1) The battery pack of claim 1, wherein the protrusions are formed only on the second wall. ### Claim 13 (depends on 1) The battery pack of claim 1, wherein the protrusions are formed only on part of the second wall. ### Claim 14 (depends on 1) The battery pack of claim 1, wherein the length of the second wall is configured to increase in response to the thickness of each of the protrusions and recesses being reduced. ### Claim 15 (depends on 1) The battery pack of claim 1, wherein the thickness of a center portion of the first wall is configured to increase in response to the outer surface of the second wall being deformed, and wherein the length of the first wall is configured to decrease in response to the thickness of the center portion of the first wall being increased.