# US 10,374,210 B2 · Terminal assembly for an electronic cell > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,374,210 B2 - Document ID: US10374210B2 - Status: Granted - Kind: B2 - Application number: 15/795,733 - Filed: 2017-10-27 - Published: 2019-05-02 - Granted: 2019-08-06 - Earliest claimed: 2017-10-27 - Assignees: Robert Bosch Battery Systems LLC; Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Andreas Ringk; Florian Postler; Martin Busche; Anton Ringel; Jeffrey Buckholz - Web page: https://patentgrep.com/patent/US10374210B2 ## CPC - H01M 50/147: Lids or covers - H01M 50/176: for prismatic or rectangular cells (H01M50/181 takes precedence) - H01M 50/553: Terminals adapted for prismatic, pouch or rectangular cells - H01M 50/562: characterised by the material - H01M 50/564: characterised by their manufacturing process - 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 An electrochemical cell includes a prismatic cell housing including a lid plate that closes one end of the housing. The cell also includes a terminal assembly having a simple structure that is supported on the lid plate. The terminal assembly includes the lid plate, a terminal and an adhesive layer that is disposed between and secures the terminal to the lid plate. The terminal assembly includes features that allow the adhesive layer to flow in a controlled and reproducible manner over the entirety of a predetermined area without flowing beyond the predetermined area. The features result from forming a stop line in the predetermined area by applying a surface treatment to the predetermined area. The stop line delineates a desired adhesive later outer boundary and engages the adhesive so as to maintain the adhesive within the predetermined area. ## Claims ### Claim 1 A terminal assembly for an electrochemical cell, the terminal assembly comprising a lid plate that closes one end of a cell housing of the electrochemical cell, the lid plate including an opening, a terminal including a terminal plate and a boss that protrudes from an outward facing surface of the terminal plate, and an adhesive layer disposed between the lid plate and the terminal, wherein the terminal is assembled with the lid plate such that the outward facing surface faces an inner surface of the lid plate and the boss extends through the opening, one of the outward facing surface of the terminal plate and the inner surface of the lid plate comprises a first region and a second region, the first region is spaced apart from the boss, the second region is disposed between the first region and the boss, the first region has first surface properties, the second region has second surface properties that are different than the first surface properties, and an outer boundary of the adhesive layer resides in an area corresponding to the first region when the terminal assembly is viewed in top plan view. ### Claim 2 (depends on 1) The terminal assembly of claim 1, wherein the first surface properties are configured to negatively impact a flow of the adhesive layer, whereby the presence of the first region having the first surface properties serves as a stop line that inhibits the flow of the adhesive layer, and the second surface properties are configured to have less negative impact on the flow of the adhesive layer than that of the first surface properties. ### Claim 3 (depends on 1) The terminal assembly of claim 1, wherein the first surface properties are a result of a surface treatment, and the second surface properties are a result of a lack of the surface treatment. ### Claim 4 (depends on 1) The terminal assembly of claim 1, wherein the first region encircles the boss. ### Claim 5 (depends on 1) The terminal assembly of claim 1, wherein the adhesive layer overlies both the first region and the second region. ### Claim 6 (depends on 1) The terminal assembly of claim 1, wherein an outer periphery of the adhesive lager overlies an outer boundary of the first region when the terminal is viewed in top plan view. ### Claim 7 (depends on 1) The terminal assembly of claim 1, wherein the outward facing surface of the terminal plate includes the first region and the second region, and the first region includes a portion of the outward facing surface of the terminal plate that adjoins a peripheral edge of the terminal plate. ### Claim 8 (depends on 7) The terminal assembly of claim 7, wherein an outer boundary of the first region coincides with the portion of the outward facing surface of the terminal plate that adjoins a peripheral edge of the terminal plate. ### Claim 9 (depends on 1) The terminal assembly of claim 1, wherein the second region adjoins the boss and the second surface properties are a result of a lack of a surface treatment. ### Claim 10 (depends on 1) The terminal assembly of claim 1, wherein the adhesive layer overlies the first region and the second region so as to extend between the boss and an outer boundary of the first region. ### Claim 11 (depends on 1) The terminal assembly of claim 1, wherein the first surface properties are a result of a surface treatment that is configured to form a roughened surface. ### Claim 12 (depends on 1) The terminal assembly of claim 1, wherein the first surface properties are a result of a surface treatment that is configured to form an oxidation layer. ### Claim 13 (depends on 1) The terminal assembly of claim 1, wherein the cell housing is formed of metal, the terminal is formed of metal, and the adhesive layer secures the terminal to the lid plate, provides a fluid-tight seal between the cell housing and the terminal, and electrically isolates the cell housing from the terminal. ### Claim 14 A method of forming a terminal assembly for an electrochemical cell, the method comprising the following method steps, providing a lid plate that is configured to close an open end of a housing of the electrochemical cell, the lid plate including an opening; providing a terminal comprising a terminal plate and a boss that protrudes from an outward facing surface of the terminal plate; treating with a surface treatment a first region of one of an inner surface of the lid plate and the outward facing surface of the terminal plate such that the first region has first surface properties; applying an adhesive layer to the one of an inner surface of the lid plate and the outward facing surface of the terminal plate, wherein the first surface properties are configured to negatively impact a flow of the adhesive layer, whereby the presence of the first region having the first surface properties serves as a stop line that inhibits the flow of the adhesive layer along the one of the inner surface of the lid plate and the outward facing surface of the terminal plate, and an outer boundary of the adhesive layer resides in an area corresponding to the first region when the terminal assembly is viewed in plan view; and assembling the terminal with the lid plate such that the outward facing surface of the terminal plate confronts the inner surface of the lid plate, the boss extends through the opening, and the adhesive layer provides a fluid-tight seal between the cell housing and the terminal, and electrically isolates the cell housing from the terminal. ### Claim 15 (depends on 14) The method of claim 14, wherein the first region is spaced apart from, the boss, and the one of an inner surface of the lid plate and the outward facing surface of the terminal plate comprises a second region disposed between the first region and the boss, the second region having second surface properties that are different than the first surface properties, and the adhesive layer is disposed in both the first region and the second region. ### Claim 16 (depends on 15) The method of claim 15, wherein the second surface properties are configured to allow greater flow of the adhesive layer than the first surface properties. ### Claim 17 A method of forming a terminal assembly for an electrochemical cell, the method comprising the following method steps, providing a lid plate that is configured to close an open end of a housing of the electrochemical cell, the lid plate including an opening; providing a terminal comprising a terminal plate and a boss that protrudes from an outward facing surface of the terminal plate; prior to application of an adhesive layer to one of an inner surface of the lid plate and the outward facing surface of the terminal plate, forming a stop line of the adhesive layer by providing a surface treatment in a first region of the one of the inner surface of the lid plate and the outward facing surface of the terminal plate, the first region formed at a location corresponding to the stop line; applying an adhesive layer to the one of the inner surface of the lid plate and the outward facing surface of the terminal plate, the adhesive layer forming an adhesive layer peripheral boundary that coincides with the stop line; and assembling the terminal with the lid plate such that the outward facing surface of the terminal plate confronts the inner surface of the lid plate, the boss extends through the opening, and the adhesive layer provides a fluid-tight seal between the cell housing and the terminal and electrically isolates the cell housing from the terminal. ### Claim 18 (depends on 17) The method of claim 17 wherein the first region is spaced apart from the boss, and the one of an inner surface of the lid plate and the outward facing surface of the terminal plate comprises a second region disposed between the first region and the boss, the second region having second surface properties that are different than first surface properties of the first region, and the adhesive layer is disposed in both the first region and the second region. ### Claim 19 (depends on 18) The method of claim 18, wherein the second surface properties are configured, to allow greater flow of the adhesive layer than the first surface properties. ### Claim 20 A terminal assembly for an electrochemical cell, the terminal assembly consisting of a lid plate configured to close one end of a cell housing of the electrochemical cell, the lid plate including an opening, a terminal including a terminal plate and a boss that protrudes from an outward facing surface of the terminal plate, and an adhesive layer disposed between the lid plate and the terminal, wherein the terminal is assembled with the lid plate such that the outward facing surface faces an inner surface of the lid plate and the boss extends through the opening.