# US 11,309,602 B2 · Casing for battery pack and battery pack > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,602 B2 - Document ID: US11309602B2 - Status: Granted - Kind: B2 - Application number: 16/433,680 - Filed: 2019-06-06 - Published: 2020-05-21 - Granted: 2022-04-19 - Earliest claimed: 2018-11-15 - Assignees: Contemporary Amperex Technology Co., Limited - Applicants: Contemporary Amperex Technology Co., Limited - Inventors: Lei Wang; Xingdi Chen; Linggang Zhou; Peng Wang; Derong Wang - Web page: https://patentgrep.com/patent/US11309602B2 ## CPC - H01M 10/625: Vehicles - H01M 10/6556: Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) - H01M 10/6567: Liquids - H01M 50/224: Metals - H01M 50/271: Lids or covers for the racks or secondary casings - H01M 10/617: for achieving uniformity or desired distribution of temperature - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/233: characterised by physical properties of casings or racks, e.g. dimensions - 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 The present disclosure relates to a casing for a battery pack and a battery pack. The casing has a receiving space and an opening in communication with the receiving space, the receiving space is formed by a wall portion of the casing, and the wall portion is formed from two or more stacked base plates, between which a plurality of cavities are formed, wherein an island is disposed within the cavity. By disposing islands in the plurality of cavities, the casing provided by the present disclosure not only can improve the structural strength of the casing and of the cavities, but also can change the flow capacity and flow rate of the fluid in the cavities, which can make the temperature distribution of the casing more uniform, increase the heat exchange efficiency of the battery assembly, and further improve the thermal management of the battery pack. ## Claims ### Claim 1 A casing for a battery pack, wherein the casing has a receiving space and an opening in communication with the receiving space, the receiving space is enclosed by a wall portion of the casing, and the wall portion is formed by pressing two or more stacked metal base plates, between which a plurality of cavities are formed, wherein an island is disposed within the cavity, wherein the wall portion comprises a bottom wall and side walls surrounding the bottom wall on a peripheral side of the bottom wall, and the bottom wall and the side walls are integrally formed by said pressing and are each formed by the two or more stacked metal base plates as the wall portion, the plurality of cavities are in communication with each other to form a flow passage, and the island is disposed within the flow passage, the two or more stacked metal base plates comprises a first base plate and a second base plate, the cavity is formed by an outwardly projecting convex wall of the second base plate and a flat wall of the first base plate corresponding to the convex wall, a portion of the island attached to the flat wall is formed in a shape of a strip or an ellipse, and a long side of the strip or a major axis of the ellipse is parallel to the length direction of the flow passage, a ratio of a height h of the cavity to a width W of the cavity is in a range of h/W≤1, and a ratio of a length L of the island to a width W1 of the island is in a range of 2≤L/W1≤5, and the length L is in a range of 5 mm≤L≤15 mm, and a ratio between a wall thickness t1 of the flat wall and a wall thickness t2 of the convex wall is in a range of 0.5≤t2/t1≤1. ### Claim 2 (depends on 1) The casing according to claim 1, wherein the island is formed by a portion of the convex wall recessed toward the flat wall. ### Claim 3 (depends on 1) The casing according to claim 1, wherein the first base plate and the second base plate are stacked in a direction from the receiving space to an exterior of the casing, and a portion of the convex wall corresponding to the island is attached to the flat wall. ### Claim 4 (depends on 3) The casing according to claim 3, wherein there is a smooth transition between a peripheral side of the island and the convex wall. ### Claim 5 (depends on 1) The casing according to claim 1, wherein there are multiple islands, which are arranged in one or more rows in a length direction of the flow passage. ### Claim 6 (depends on 5) The casing according to claim 5, wherein a first space L1 is defined as a distance from a center of the island to one side of the cavity, wherein the first space L1 is equal to or greater than the width W1 of the island. ### Claim 7 (depends on 6) The casing according to claim 6, wherein a second space L2 is defined as a distance between two adjacent islands in each row in the length direction of the flow passage, wherein the second space L2 is equal to or greater than the first space L1. ### Claim 8 (depends on 1) A battery pack, comprising: a battery assembly; a casing according to claim 1; and a cover closing the opening of the casing to form an enclosed space for accommodating the battery assembly together with the receiving space of the casing. ### Claim 9 (depends on 8) The battery pack according to claim 8, wherein the island is formed by a portion of the convex wall recessed toward the flat wall. ### Claim 10 (depends on 8) The battery pack according to claim 8, wherein the first base plate and the second base plate are stacked in a direction from the receiving space to an exterior of the casing, and a portion of the convex wall corresponding to the island is attached to the flat wall. ### Claim 11 (depends on 10) The battery pack according to claim 10, wherein there is a smooth transition between a peripheral side of the island and the convex wall. ### Claim 12 (depends on 8) The battery pack according to claim 8, wherein there are multiple islands, which are arranged in one or more rows in a length direction of the flow passage. ### Claim 13 (depends on 12) The battery pack according to claim 12, wherein a first space L1 is defined as a distance from a center of the island to one side of the cavity, wherein the first space L1 is equal to or greater than the width W1 of the island. ### Claim 14 (depends on 13) The battery pack according to claim 13, wherein a second space L2 is defined as a distance between two adjacent islands in each row in the length direction of the flow passage, wherein the second space L2 is equal to or greater than the first space L1. ### Claim 15 (depends on 5) The battery case according to claim 5, wherein the islands in each row are arranged at equal intervals. ### Claim 16 (depends on 12) The battery pack according to claim 12, wherein the islands in each row are arranged at equal intervals.