# US 11,027,589 B2 · Electric motor with cooling system and corresponding method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,027,589 B2 - Document ID: US11027589B2 - Status: Granted - Kind: B2 - Application number: 16/375,916 - Filed: 2019-04-05 - Published: 2019-10-10 - Granted: 2021-06-08 - Earliest claimed: 2018-04-10 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Hans Guenter Quix; Lars Kaufmann; Thomas Zenner; Mehmet Toeremis - Web page: https://patentgrep.com/patent/US11027589B2 ## CPC - B60H 1/00278: {for the battery} - B60H 1/00492: {comprising regenerative heating or cooling means, e.g. heat accumulators} - B60H 1/00499: {Heat or cold storage without phase change including solid bodies, e.g. batteries} - B60H 1/00921: {where the flow direction of the refrigerant does not change and there is an extra subcondenser, e.g. in an air duct} - B60K 11/02: with liquid cooling - B60W 30/194: related to low temperature conditions, e.g. high viscosity of hydraulic fluid - B60H 2001/00307: {Component temperature regulation using a liquid flow} - B60K 2001/005: {the electric storage means} - B60K 2001/006: {the electric motors} - Y02E 60/10: Energy storage using batteries - B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract An example cooling system for an electric includes an electric motor having a supply opening for receiving coolant and a discharge opening for expelling coolant. The discharge opening is connected to the supply opening via a coolant circuit including a first return line in which a heat exchanger is arranged, a bypass line, and a second return line. The discharge opening is connected to the supply opening by both the first return line and the bypass line, and the bypass line bypasses the heat exchanger arranged in the first return line. A battery is arranged in the second return line, and the second return line is selectively connected to a short-circuit line which causes coolant to flow from a point downstream of the battery and return to the second return line upstream of the battery. Further, a heat accumulator is arranged in the short-circuit line. ## Claims ### Claim 1 A cooling system for an electric motor, comprising: an electric motor having a thermal exchange feature with a supply opening for receiving coolant and a discharge opening for expelling coolant, wherein: the discharge opening is connected to the supply opening via a coolant circuit, the coolant circuit includes a first return line in which a heat exchanger is arranged, a bypass line, and a second return line, the discharge opening is connected to the supply opening by both the first return line and the bypass line, the bypass line bypasses the heat exchanger arranged in the first return line, a battery is arranged in the second return line, and the second return line is selectively connected to a short-circuit line which causes coolant to flow from a point downstream of the battery and return to the second return line upstream of the battery, and a heat accumulator is arranged in the short-circuit line. ### Claim 2 (depends on 1) The cooling system as recited in claim 1, wherein a flow regulator is arranged at the point downstream of the battery and is configured to selectively fluidly couple the second return line to the short-circuit line. ### Claim 3 (depends on 1) The cooling system as recited in claim 1, wherein a pump is arranged in the short-circuit line. ### Claim 4 (depends on 1) The cooling system as recited in claim 1, wherein a coolant-operated vehicle interior heating system is arranged in the second return line upstream of the battery. ### Claim 5 (depends on 4) The cooling system as recited in claim 4, wherein a backflow prevention valve is arranged downstream of the coolant-operating vehicle interior heating system and upstream of the battery. ### Claim 6 (depends on 1) The cooling system as recited in claim 1, wherein the second return line returns to the bypass line. ### Claim 7 (depends on 1) The cooling system as recited in claim 1, wherein the heat accumulator is electrically heatable. ### Claim 8 (depends on 1) The cooling system as recited in claim 1, wherein the heat accumulator is configured to store heated coolant and is thermally insulated. ### Claim 9 (depends on 1) The cooling system as recited in claim 1, wherein the discharge opening is selectively connected to the heat accumulator via a heating line. ### Claim 10 (depends on 1) The cooling system as recited in claim 1, wherein the bypass line branches off from the first return line at a nodal point, and a thermostat valve is arranged at the nodal point. ### Claim 11 (depends on 1) The cooling system as recited in claim 1, wherein the electric motor is a used to drive a motor vehicle. ### Claim 12 (depends on 11) The cooling system as recited in claim 11, wherein the battery is a traction battery. ### Claim 13 (depends on 1) The cooling system as recited in claim 1, wherein the thermal exchange feature is a thermal jacket arranged relative to the electric motor, the supply opening configured to permit fluid to enter the thermal jacket, and the discharge opening configured to direct fluid to flow out of the thermal jacket. ### Claim 14 A method, comprising: charging a heat accumulator with waste heat from an electric motor; and discharging the heat accumulator to heat a battery, wherein the charging step includes directing coolant from an electric motor to a heat accumulator via a heating line, wherein the discharging step includes directing coolant from the heat accumulator to the battery via a short-circuit line, the heat accumulator is arranged in the short-circuit line, and wherein the discharging step includes running a pump arranged in the short-circuit line. ### Claim 15 (depends on 14) The method as recited in claim 14, wherein the heating line is connected to the short-circuit line upstream of the heat accumulator. ### Claim 16 A method, comprising: charging a heat accumulator with waste heat from an electric motor; and discharging the heat accumulator to heat a battery, wherein the charging step includes directing coolant from an electric motor to a heat accumulator via a heating line, wherein the discharging step includes directing coolant from the heat accumulator to the battery via a short-circuit line, the heat accumulator is arranged in the short-circuit line, and wherein the short-circuit line is provided between a first point downstream of a battery and a second point upstream of the battery. ### Claim 17 (depends on 16) The method as recited in claim 16, wherein a flow regulator is arranged at the first point and is configured to selectively connect a bypass line to the short-circuit line, the battery is arranged in the bypass line and the bypass line is ultimately connected to the electric motor.