# US 12,763,595 B2 · Battery charger including a sealed battery interface > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,763,595 B2 - Document ID: US12763595B2 - Status: Granted - Kind: B2 - Application number: 18/182,599 - Filed: 2023-03-13 - Published: 2023-09-14 - Granted: 2026-10-13 - Earliest claimed: 2022-03-14 - Assignees: Milwaukee Electric Tool Corporation - Applicants: Milwaukee Electric Tool Corporation - Inventors: Bhaumik M. Vashi - Web page: https://patentgrep.com/patent/US12763595B2 ## CPC - H02J 7/751: {concerning the insertion or the connection of the batteries} - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract The present disclosure provides a battery charger to which a battery pack may be coupled. The battery charger includes a housing, a terminal block, and a receptacle. The housing includes a battery receiving interface that defines a recess that extends inwardly toward a cavity defined in the housing. The terminal block is disposed in the recess. The receptacle is coupled to the battery receiving interface and a seal is interposed between the receptacle and the battery receiving interface. The battery receiving interface, the receptacle, and the seal cooperate to form a chamber between the terminal block and the cavity. ## Claims ### Claim 1 A battery charger to which a battery pack may be coupled, the battery charger comprising: a housing including a battery receiving interface, the housing defining a cavity, the battery receiving interface defining a recess extending inwardly toward the cavity; a terminal block disposed in the recess; and a receptacle coupled to the battery receiving interface, the receptacle including a seal interposed between the receptacle and the battery receiving interface, wherein the battery receiving interface, the receptacle, and the seal cooperate to form a chamber between the terminal block and the cavity, the chamber sealed from the cavity. ### Claim 2 (depends on 1) The battery charger of claim 1, wherein the receptacle further includes a channel defined therein, the channel extending about a majority of a perimeter of the chamber, the seal includes a gasket disposed in the channel. ### Claim 3 (depends on 2) The battery charger of claim 2, wherein the terminal block includes at least one terminal fin extending in a direction away from the receptacle, the chamber includes a rectangular cross-section in a plane perpendicular to the direction of the terminal fin, and the channel extends along the plane and around at least three sides of the chamber. ### Claim 4 (depends on 3) The battery charger of claim 3, wherein the gasket is overmolded on the receptacle. ### Claim 5 (depends on 2) The battery charger of claim 2, wherein the seal further includes a grommet. ### Claim 6 (depends on 5) The battery charger of claim 5, further including a plurality of wires extending from the terminal block, through the chamber, and through the grommet. ### Claim 7 (depends on 6) The battery charger of claim 6, the grommet including a plurality of holes defined therein, each hole corresponding to a respective wire. ### Claim 8 (depends on 6) The battery charger of claim 6, wherein the plurality of wires are overmolded in the terminal block. ### Claim 9 (depends on 1) The battery charger of claim 1, further comprising a passage defined between the terminal block and the battery receiving interface, the passage in fluid communication with the chamber. ### Claim 10 (depends on 9) The battery charger of claim 9, wherein the terminal block includes at least one terminal fin, and the passage is located on a side of the terminal block opposite the terminal fin. ### Claim 11 (depends on 1) The battery charger of claim 1, wherein the receptacle supports the terminal block. ### Claim 12 A battery charger to which a battery pack may be coupled, the battery charger comprising: a battery receiving interface, the battery receiving interface having an exterior receiving side and an opposite interior side; a chamber disposed on the interior side, the chamber configured to receive and retain fluid introduced to the exterior receiving side of the battery receiving interface; a terminal block disposed in the battery receiving interface; and a plurality of wires coupled to the terminal block, the plurality of wires extending through the chamber. ### Claim 13 (depends on 12) The battery charger of claim 12, wherein the plurality of wires are overmolded in the terminal block. ### Claim 14 (depends on 12) The battery charger of claim 12, wherein the battery receiving interface includes an introduction end and a stop end opposite the introduction end, and a passage defined between the terminal block and the battery receiving interface, a distance between the passage and the stop end is shorter than a distance between the passage and the introduction end, the passage is in fluid communication with the chamber. ### Claim 15 (depends on 14) The battery charger of claim 14, wherein the passage is between the terminal block and the stop end of the battery receiving interface. ### Claim 16 (depends on 15) The battery charger of claim 15, the battery receiving interface further comprising a sealing interface encompassing the chamber. ### Claim 17 (depends on 16) The battery charger of claim 16, the sealing interface including a gasket, the gasket encompassing a majority of the chamber. ### Claim 18 (depends on 17) The battery charger of claim 17, wherein the gasket is overmolded with the battery receiving interface. ### Claim 19 (depends on 16) The battery charger of claim 16, wherein the sealing interface includes a grommet through which the plurality of wires extend, the grommet being positioned closer to the introduction end than to the stop end. ### Claim 20 A battery charger to which a battery pack may be coupled, the battery charger comprising: a housing including a battery receiving interface, the housing defining a cavity, the battery receiving interface defining a recess extending inwardly toward the cavity; a terminal block having a plurality of wires extending therefrom, the terminal block disposed in the recess; a passage defined between the terminal block and the battery receiving interface; a receptacle coupled to the battery receiving interface, the receptacle including a channel defined therein; and a seal interposed between the receptacle and the battery receiving interface, the battery receiving interface, the receptacle, and the seal cooperate to form a chamber between the terminal block and cavity, the channel extending about a majority of a perimeter of the chamber, the chamber in fluid communication with the passage, the seal having: a gasket disposed in the channel, the gasket being overmolded on the receptacle, and a grommet having a plurality of holes through which the plurality of wires extend, the grommet interposed between the receptacle and the housing.