# US 12,218,327 B2 · Battery heating via heat collected from coolant passing through hollow windings of electric machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,218,327 B2 - Document ID: US12218327B2 - Status: Granted - Kind: B2 - Application number: 18/190,446 - Filed: 2023-03-27 - Published: 2024-10-03 - Granted: 2025-02-04 - Earliest claimed: 2023-03-27 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Jonathan Hair; Matthew Penne - Web page: https://patentgrep.com/patent/US12218327B2 ## CPC - H01M 10/633: characterised by algorithms, flow charts, software details or the like - H01M 10/625: Vehicles - H02K 3/24: with channels or ducts for cooling medium between the conductors - H02K 9/19: for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil - H02K 9/193: with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium - H02K 11/0094: {Structural association with other electrical or electronic devices} - H02K 11/25: Devices for sensing temperature, or actuated thereby - H02K 11/30: Structural association with control circuits or drive circuits - H02P 29/64: Controlling or determining the temperature of the winding - B60L 58/26: by cooling - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES ## Abstract Responsive to a temperature of a battery being less than a threshold temperature, a controller directs coolant from hollow wires wound within slots of a stator to a coolant circuit for the battery. Responsive to the temperature being greater than the threshold temperature, the controller directs the coolant from the hollow wires back to the hollow wires while bypassing the coolant circuit. ## Claims ### Claim 1 An automotive system comprising: an electric machine including a stator defining slots and a plurality of hollow wires wound within the slots; and a pump configured to drive coolant through the hollow wires to cool the electric machine. ### Claim 2 (depends on 1) The automotive system of claim 1 further comprising a battery coolant circuit and a valve configured to selectively direct the coolant to the hollow wires or the battery coolant circuit. ### Claim 3 (depends on 2) The automotive system of claim 2 further comprising a battery, wherein the battery coolant circuit is arranged to cool the battery. ### Claim 4 (depends on 3) The automotive system of claim 3 further comprising a controller programmed to control the valve based on a temperature of the battery. ### Claim 5 (depends on 4) The automotive system of claim 4 further comprising a controller programmed to control the valve based on a temperature of the coolant. ### Claim 6 (depends on 4) The automotive system of claim 4, wherein the controller is further programmed to control the valve to direct the coolant exiting the hollow wires back to the hollow wires while bypassing the battery coolant circuit. ### Claim 7 (depends on 4) The automotive system of claim 4, wherein the controller is further programmed to control the valve to direct the coolant exiting the hollow wires through the battery coolant circuit and back to the hollow wires. ### Claim 8 (depends on 1) The automotive system of claim 1, wherein the hollow wires have rectangular cross-sections. ### Claim 9 (depends on 1) The automotive system of claim 1, wherein the hollow wires have circular cross-sections. ### Claim 10 An automotive system comprising: a controller programmed to, based on a temperature of a battery, selectively direct coolant through a coolant circuit for the battery and hollow windings of an electric machine. ### Claim 11 (depends on 10) The automotive system of claim 10, wherein the controller is further programmed to set a position of a valve in fluid communication with a coolant circuit and the hollow windings. ### Claim 12 (depends on 11) The automotive system of claim 11, wherein the hollow windings have a circular or square cross-section. ### Claim 13 (depends on 11) The automotive system of claim 11, wherein the controller is further programmed to set the position based on a temperature of the coolant. ### Claim 14 A method comprising: responsive to a temperature of a battery being less than a threshold temperature, directing coolant from hollow wires wound within slots of a stator to a coolant circuit for the battery; and responsive to the temperature being greater than the threshold temperature, directing the coolant from the hollow wires back to the hollow wires while bypassing the coolant circuit. ### Claim 15 (depends on 14) The method of claim 14, wherein the directing coolant from hollow wires wound within slots of a stator to a coolant circuit for the battery includes setting a position of a valve. ### Claim 16 (depends on 14) The method of claim 14, wherein the directing the coolant from the hollow wires back to the hollow wires while bypassing the coolant circuit includes setting a position of a valve.