# US 2023/0054789 A1 · Serviceable battery pack > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0054789 A1 - Document ID: US20230054789A1 - Status: Published application - Kind: A1 - Application number: 17/795,977 - Filed: 2021-01-28 - Published: 2023-02-23 - Earliest claimed: 2020-01-31 - Assignees: Briggs & Stratton Corporation - Applicants: Briggs & Stratton, LLC - Inventors: Jeffrey Zeiler; Michael Marshall; Jacob Schmalz; John Piechowski - Web page: https://patentgrep.com/patent/US20230054789A1 ## CPC - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 50/296: characterised by terminals of battery packs (terminals of batteries H01M50/543) - H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)} - H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells - H01M 50/213: adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence) - H01M 50/249: specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) - H01M 50/258: Modular batteries; Casings provided with means for assembling - H01M 50/262: with fastening means, e.g. locks - H01M 50/271: Lids or covers for the racks or secondary casings - H01M 50/574: Devices or arrangements for the interruption of current - H01M 50/298: characterised by the wiring of battery packs - H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing} - H01M 2010/4278: {Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller} - 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 pack includes a housing, a positive terminal and a negative terminal, and a plurality of cell module assemblies. The positive terminal and negative terminal are each externally accessible from the housing and extend into a first compartment of the housing. The cell module assemblies are received in a second compartment of the housing, and are coupled to the positive terminal and the negative terminal through a connection extending from the second compartment into the first compartment. The first compartment is accessible through a first panel that is movably coupled to the housing through a first securing mechanism providing a first level of access. The second compartment is accessible through a second panel that is movably coupled to the housing through a second securing mechanism providing a second level of access. ## Claims ### Claim at position 1 1-29. (canceled) ### Claim 30 A battery pack, comprising: a housing including a first compartment and a second compartment; a positive terminal and a negative terminal, the positive terminal and the negative terminal each externally accessible from the housing and extending into the first compartment; and a plurality of cell module assemblies (CMAs) received within the second compartment, the plurality of CMAs being electrically coupled to the positive terminal and the negative terminal through a connection extending from the second compartment into the first compartment, wherein the plurality of CMAs each include a plurality of rechargeable lithium-ion battery cells; wherein the first compartment is accessible through a first panel that is movably coupled to the housing through a first securing mechanism providing a first level of access; and wherein the second compartment is accessible through a second panel that is movably coupled to the housing through a second securing mechanism providing a second level of access, wherein the second securing mechanism is different from the first securing mechanism. ### Claim 31 (depends on 30) The battery pack of claim 30, wherein the first panel is a front panel of the battery pack, and wherein the first panel supports the positive terminal and the negative terminal. ### Claim 32 (depends on 31) The battery pack of claim 31, wherein the front panel further comprises a data connector, the data connector including a connection extending through the first compartment to a battery management system positioned in the second compartment. ### Claim 33 (depends on 31) The battery pack of claim 31, wherein the front panel further comprises a data connector, the data connector including a connection extending into the first compartment to a battery management system positioned within the first compartment, wherein the battery management system is in communication with at least one of the plurality of CMAs within the second compartment. ### Claim 34 (depends on 30) The battery pack of claim 30, wherein the second securing mechanism includes a lock that is selectively unlockable using a key. ### Claim 35 (depends on 34) The battery pack of claim 34, wherein the key is transmitted wirelessly to a reader positioned within the battery pack. ### Claim 36 (depends on 30) The battery pack of claim 30, wherein the first compartment includes a disconnect device, wherein the disconnect device is configured to selectively decouple the plurality of CMAs from the positive terminal and the negative terminal. ### Claim 37 (depends on 30) The battery pack of claim 30, wherein each of a battery management system, a disconnect device, a wiring harness, a shunt, and a data connector are positioned within the first compartment. ### Claim 38 (depends on 30) The battery pack of claim 30, wherein the housing includes a third compartment, wherein a shunt of the battery pack is located in the third compartment. ### Claim 39 (depends on 30) The battery pack of claim 30, wherein the first compartment and the second compartment isolate a plurality of CMAs from a battery management system and a disconnect device within the battery pack. ### Claim 40 (depends on 30) The battery pack of claim 30, wherein the second securing mechanism is only accessible from within the first compartment. ### Claim 41 (depends on 30) The battery pack of claim 30, wherein the first securing mechanism operates independently of the second securing mechanism. ### Claim 42 (depends on 30) The battery pack of claim 30, wherein the first securing mechanism includes a front panel mounted to the housing and wherein the second securing mechanism includes a top panel mounted to the housing. ### Claim 43 (depends on 30) The battery pack of claim 30, wherein each of the plurality of CMAs include a first form factor, wherein a module component comprising a battery management system and a disconnect device of the battery pack has a second form factor, and wherein the second form factor is the same as the first form factor. ### Claim 44 A battery pack, comprising: a housing including a first compartment and a second compartment; a positive terminal and a negative terminal, the positive terminal and the negative terminal each externally accessible from the housing and extending into the first compartment; and a plurality of cell module assemblies (CMAs) received within the second compartment, the plurality of CMAs being electrically coupled to the positive terminal and the negative terminal through a connection extending from the second compartment into the first compartment, wherein the plurality of CMAs each include a plurality of rechargeable lithium-ion battery cells; wherein the first compartment is accessible through a first panel that is movably coupled to the housing through a first securing mechanism providing a first level of access; and wherein the second compartment is accessible through a second panel that is movably coupled to the housing through a second securing mechanism providing a second level of access, wherein the second level of access is lower than the first level of access. ### Claim 45 (depends on 44) The battery pack of claim 44, wherein the first compartment is accessible through the first panel, the first panel being fastened to the housing, and wherein the first panel supports the positive terminal and the negative terminal. ### Claim 46 (depends on 45) The battery pack of claim 45, wherein the first panel further supports a data connector, wherein the data connector is in communication with a battery management system positioned within the housing. ### Claim 47 (depends on 46) The battery pack of claim 46, wherein the battery management system is positioned within the first compartment. ### Claim 48 (depends on 46) The battery pack of claim 46, wherein the battery management system is positioned within the second compartment, and wherein a wired connection extends between the data connector, through the first compartment, and into the second compartment. ### Claim 49 A battery pack, comprising: a housing including a first compartment and a second compartment; a positive terminal, a negative terminal and a data connector terminal, the positive terminal, the negative terminal, and the data connector terminal each externally accessible from the housing and extending into the first compartment; a plurality of cell module assemblies (CMAs) received within the second compartment, the plurality of CMAs being electrically coupled to the positive terminal and the negative terminal through a physical connection extending from the second compartment into the first compartment, wherein the plurality of CMAs each include a plurality of rechargeable lithium-ion battery cells; and a battery management system positioned within the housing and coupled to the data connector terminal, wherein the battery management system is configured to communicate externally through the data connector terminal; wherein the first compartment is accessible through a first securing mechanism providing a first level of access; and wherein the second compartment is accessible through a second securing mechanism providing a second level of access, wherein the second level of access is lower than the first level of access.