# US 12,603,540 B2 · Rotary electric machine, with fluid distribution chamber between stator and housing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,603,540 B2 - Document ID: US12603540B2 - Status: Granted - Kind: B2 - Application number: 18/044,282 - Filed: 2021-09-01 - Published: 2023-10-19 - Granted: 2026-04-14 - Earliest claimed: 2020-09-11 - Assignees: Valeo Powertrain (Nanjing) Co., Ltd. - Applicants: Valeo Powertrain (Nanjing) Co., Ltd. - Inventors: Yejin Jin; Kai Chen; Guoqiang Sun - Web page: https://patentgrep.com/patent/US12603540B2 ## CPC - H02K 5/203: {specially adapted for liquids, e.g. cooling jackets} - H02K 9/19: for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil - H02K 1/185: {to outer stators} - H02K 7/006: {Structural association of a motor or generator with the drive train of a motor vehicle} - Y02T 10/64: Electric machine technologies in electromobility - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A rotary electric machine includes a rotor configured for coupling with a rotary shaft and a stator configured for surrounding the rotor, the stator includes a stator body and stator end windings which extend from axial ends of the stator body. The rotary electric machine further includes a housing configured for receiving the stator and rotor, the housing includes a fluid distributing chamber provided along an inner surface of the housing for being communicated with a plurality of fluid channels so as to distribute the fluid to flow through outer surfaces of the stator body and stator end windings when the stator is inserted into the housing. The present disclosure further relates to a powertrain assembly and an electrified vehicle including the rotary electric machine. ## Claims ### Claim 1 A rotary electric machine, comprising a rotor configured for coupling with a rotary shaft; a stator configured for surrounding the rotor, the stator comprising a stator body and stator end windings extending from axial ends of the stator body; and a housing configured for receiving the stator and rotor, wherein a fluid distributing chamber provided along an inner surface of the housing for being communicated with a plurality of fluid channels so as to distribute the fluid to flow through outer surfaces of the stator body and the stator end windings when the stator is inserted into the housing, the fluid distributing chamber being delimited by an annular groove on the inner surface of the housing surrounding the stator in a circumferential direction, wherein a first set of the plurality of fluid channels is formed by a first outer surface of the stator and by a plurality of slots circumferentially spaced and provided with the housing on a first axial side of the annular groove, the plurality of slots being configured for directing the fluid to flow through a first stator end winding via outlets of the plurality of slots, wherein a second set of the plurality of fluid channels is formed by a plurality of recesses arranged between the stator body and the housing, the plurality of recesses extending axially parallel to an axis of the rotary electric machine and being circumferentially spaced and provided onto at least one of the outer surface of stator body and the inner surface of the housing on a second axial side of the annular groove, the plurality of recesses being configured for directing the fluid to flow through a second stator end winding via outlets of the plurality of recesses, and wherein the outlets of the plurality of slots are radially inward of the outlets of the plurality of recesses. ### Claim 2 (depends on 1) The rotary electric machine according to claim 1, further comprising a single inlet provided with the housing, the single inlet being configured for introducing a fluid into the fluid distributing chamber. ### Claim 3 (depends on 1) A powertrain assembly, comprising the rotary electric machine according to claim 1. ### Claim 4 (depends on 1) An electrified vehicle, comprising the rotary electric machine according to claim 1. ### Claim 5 (depends on 1) The rotary electric machine according to claim 1, wherein the fluid distributing chamber is disposed where the stator abuts against the housing in an axial direction and is formed by one inner surface of the housing and by one outer surface of the stator. ### Claim 6 (depends on 5) A powertrain assembly, comprising the rotary electric machine according to claim 5. ### Claim 7 (depends on 5) An electrified vehicle, comprising the rotary electric machine according to claim 5. ### Claim 8 (depends on 1) The rotary electric machine according to claim 1, wherein the plurality of slots are arranged onto an edge of a stopper surface configured for limiting an axial movement of the stator. ### Claim 9 (depends on 8) A powertrain assembly, comprising the rotary electric machine according to claim 8. ### Claim 10 (depends on 8) An electrified vehicle, comprising the rotary electric machine according to claim 8. ### Claim 11 (depends on 8) The rotary electric machine according to claim 8, wherein the stopper surface is one side of the annular groove.