# US 12,603,343 B2 · Component layout of liquid cooling components in electric work vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,603,343 B2 - Document ID: US12603343B2 - Status: Granted - Kind: B2 - Application number: 18/532,168 - Filed: 2023-12-07 - Published: 2025-05-01 - Granted: 2026-04-14 - Earliest claimed: 2023-10-30 - Assignees: Kubota Corporation - Applicants: Kubota Corporation - Inventors: Roatchanatam Anattasakul - Web page: https://patentgrep.com/patent/US12603343B2 ## CPC - B60K 1/04: of the electric storage means for propulsion - H01M 10/613: Cooling or keeping cold - A01D 69/02: electric - B60K 11/02: with liquid cooling - H01M 10/625: Vehicles - B60K 2001/003: {with means for cooling the electrical propulsion units} - B60K 2001/0411: {Arrangement in the front part of the vehicle} - B60Y 2200/221: Tractors - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - 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 - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - A01D: HARVESTING; MOWING - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An electric work vehicle includes a chassis, a battery housing to house a plurality of battery modules, a liquid cooling system, at least one electric motor, and at least one inverter. The liquid cooling system includes a pump, a radiator, and a fan. The battery housing is supported by the chassis. The at least one inverter is electrically connected to the plurality of battery modules and the at least one electric motor. The pump is attached to a back surface of the battery housing. The radiator and the fan are attached on a front surface of the battery housing. The at least one inverter is attached to a side surface of the battery housing that faces a width direction. The at least one inverter and the at least one electric motor are mounted between the fan and the pump in a front-rear direction. ## Claims ### Claim 1 An electric work vehicle comprising: a chassis; a battery housing to house a plurality of battery modules, the battery housing being supported by the chassis; a liquid cooling system including a pump, a radiator, and a fan; and at least one electric motor; at least one inverter; wherein the at least one inverter is electrically connected to the plurality of battery modules and the at least one electric motor; the pump is attached to a back surface of the battery housing; the radiator and the fan are attached on a front surface of the battery housing; the at least one inverter is attached to a side surface of the battery housing that faces a width direction of the electric work vehicle; the at least one inverter and the at least one electric motor are mounted between the fan and the pump in a front-rear direction of the electric work vehicle; the pump outputs coolant to cool the at least one electric motor and the at least one inverter; after passing to the at least one electric motor and the at least one inverter, the coolant is received by the radiator; and after passing to the radiator, the coolant returns to the pump. ### Claim 2 (depends on 1) The electric work vehicle according to claim 1, wherein the fan is operable to direct air in a forward direction. ### Claim 3 (depends on 1) The electric work vehicle according to claim 1, wherein the radiator and the fan are supported by posts mounted to the chassis. ### Claim 4 (depends on 1) The electric work vehicle according to claim 1, wherein the radiator and the fan are supported by brackets mounted to the battery housing. ### Claim 5 (depends on 1) The electric work vehicle according to claim 1, wherein the liquid cooling system includes a surge tank on the front surface of the battery housing. ### Claim 6 (depends on 5) The electric work vehicle according to claim 5, wherein the surge tank located at a side of the fan in the width direction of the electric work vehicle. ### Claim 7 (depends on 1) The electric work vehicle according to claim 1, further comprising: a first coolant line to distribute the coolant from the liquid cooling system; and a second coolant line to return the coolant to the liquid cooling system. ### Claim 8 (depends on 7) The electric work vehicle according to claim 7, wherein: the first coolant line is connected to a distribution hydraulic manifold, and the second coolant line is connected to a return hydraulic manifold. ### Claim 9 (depends on 8) The electric work vehicle according to claim 8, wherein a pressure drop in the first coolant line is equal or substantially equal to a pressure drop in the second coolant line. ### Claim 10 (depends on 1) The electric work vehicle according to claim 1, wherein the liquid cooling system includes a heat exchanger attached to the front surface of the battery housing. ### Claim 11 (depends on 10) The electric work vehicle according to claim 10, wherein the heat exchanger is located at a side of the fan in the width direction of the electric work vehicle. ### Claim 12 (depends on 10) The electric work vehicle according to claim 10, wherein the heat exchanger is an oil heat exchanger. ### Claim 13 (depends on 12) The electric work vehicle according to claim 12, wherein the oil heat exchanger is connected to at least one hydraulic oil line. ### Claim 14 (depends on 12) The electric work vehicle according to claim 12, further comprising at least one oil line connected to a steering system of the electric work vehicle. ### Claim 15 (depends on 12) The electric work vehicle according to claim 12, further comprising at least one oil line connected to a braking system of the electric work vehicle. ### Claim 16 (depends on 12) The electric work vehicle according to claim 12, further comprising at least one oil line connected to a drivetrain gearing of the electric work vehicle. ### Claim 17 (depends on 1) The electric work vehicle according to claim 1, further comprising: a condenser, wherein the radiator is located between the condenser and the fan. ### Claim 18 (depends on 17) The electric work vehicle according to claim 17, wherein the fan is located forward of the condenser in the front-rear direction of the electric work vehicle. ### Claim 19 (depends on 17) The electric work vehicle according to claim 17, wherein the condenser is located between the battery housing and the radiator. ### Claim 20 (depends on 1) The electric work vehicle according to claim 1, wherein: the liquid cooling system includes a surge tank and a heat exchanger, and the surge tank and the heat exchanger are located on opposite sides of the fan in the width direction of the electric work vehicle.