# US 11,299,006 B2 · Thermoregulation system for an electrically driven vehicle, and vehicle comprising such a system

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- Number: US 11,299,006 B2
- Document ID: US11299006B2
- Status: Granted
- Kind: B2
- Application number: 16/970,445
- Filed: 2018-03-28
- Published: 2021-01-07
- Granted: 2022-04-12
- Earliest claimed: 2018-03-28
- Assignees: Volvo Truck Corporation
- Applicants: Volvo Truck Corporation
- Inventors: Ronan Mothier
- Web page: https://patentgrep.com/patent/US11299006B2

## CPC

- B60H 1/00392: {for electric vehicles having only electric drive means}
- B60K 1/00: Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00)
- B60H 1/00278: {for the battery}
- B60H 1/00328: {of the liquid-air type}
- B60H 1/00485: {Valves for air-conditioning devices, e.g. thermostatic valves}
- B60H 1/00885: {Controlling the flow of heating or cooling liquid, e.g. valves or pumps (B60H1/00899 takes precedence; constructions of valves B60H1/00485)}
- B60H 1/06: directly from main radiator
- B60H 1/143: {the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries}
- B60K 11/04: Arrangement or mounting of radiators, radiator shutters, or radiator blinds
- B60L 50/66: {Arrangements of batteries}
- B60L 58/26: by cooling
- B60H 2001/00307: {Component temperature regulation using a liquid flow}
- B60H 2001/00942: {comprising a plurality of heat exchangers, e.g. for multi zone heating or cooling}
- B60K 2001/005: {the electric storage means}
- Y02T 10/70: Energy storage systems for electromobility, e.g. 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
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

This thermoregulation system (1) for an electrically driven vehicle (V), the vehicle comprising at least one electric machine (E), at least one battery (30), and at least one power electronics component (37), comprises a coolant circuit (5), a pump (7), coolant heat exchangers, connected to the coolant circuit (5) so that the coolant may circulate through them and comprising a main exchanger (9), configured for exchanging heat between the coolant and air coming from the outside of the vehicle (V), at least one battery exchanger (11), configured for exchanging heat between the coolant and said at least one battery (30), and at least one secondary exchanger (13, 36), configured for exchanging heat between the coolant and said at least one electric machine (E) and/or said at least one power electronics component (37). The coolant circuit (5) is divided in a first branch (B1), which comprises the main exchanger (9) and the at least one battery exchanger (11), a second branch (B2) which comprises the at least one secondary exchanger (13, 36), the coolant being circulated in parallel in the first and second branches (B1, B2), and a pump branch (PB) to which the pump (7) is connected, the pump branch (PB) being connected to the first and second branches (B1, B2) by an upstream and a downstream connection points (P1, P2) so that the coolant circulating in the pump branch (PB) is formed by a mix of the coolant circulating in the first branch (B1) and of the coolant circulating in the second branch (B2), and is directed towards the first and second branches (B1, B2) downstream the pump (7).

## Claims

### Claim 1

A thermoregulation system for an electrically driven vehicle, the vehicle comprising:
at least one electric machine, and
at least one battery for storing electrical energy for powering said at least one electric machine,
at least one power electronics component,
the thermoregulation system comprising:
a coolant circuit in which circulates a coolant,
a pump for circulating the coolant,
coolant heat exchangers, connected to the coolant circuit so that the coolant may circulate through them and comprising:
a main exchanger, configured for exchanging heat between the coolant and air coming from the outside of the vehicle;
at least one battery exchanger, configured for exchanging heat between the coolant and said at least one battery;
at least one secondary exchanger, configured for exchanging heat between the coolant and said at least one electric machine and/or said at least one power electronics component,
wherein the coolant circuit is divided in:
a first branch, which comprises the main exchanger and the at least one battery exchanger,
a second branch which comprises the at least one secondary exchanger, the coolant being circulated in parallel in the first and second branches, and
a pump branch to which the pump is connected, the pump branch being connected to the first and second branches by an upstream and a downstream connection points so that the coolant circulating in the pump branch is formed by a mix of the coolant circulating in the first branch and of the coolant circulating in the second branch, and is directed towards the first and second branches downstream the pump.

### Claim 2 (depends on 1)

A thermoregulation system according to claim 1, wherein the main exchanger is located upstream the at least one battery exchanger.

### Claim 3 (depends on 1)

A thermoregulation system according to claim 1, wherein the main exchanger is formed by at least one radiator.

### Claim 4 (depends on 1)

A thermoregulation system according to claim 1, wherein the main exchanger is equipped with at least one fan accelerating air passage in the main exchanger.

### Claim 5 (depends on 1)

A thermoregulation system according to claim 1, wherein the coolant circuit comprises a bypass line allowing reduction or deactivation of coolant circulation in the main exchanger.

### Claim 6 (depends on 1)

A thermoregulation system according to claim 1, wherein the coolant circuit comprises a bypass line allowing isolation of the at least one battery exchanger from the coolant circuit.

### Claim 7 (depends on 1)

A thermoregulation system according to claim 1, wherein the thermoregulation system comprises a heating system connected to the second branch and adapted to heat up a conditioned air flow circulating in a driver cabin of the vehicle.

### Claim 8 (depends on 7)

A thermoregulation system according to claim 7, wherein the heating system is located downstream the at least one secondary exchanger.

### Claim 9 (depends on 1)

A thermoregulation system according to claim 1, wherein the second branch is also connected to at least one supplemental exchanger of the thermoregulation system configured for exchanging heat between the coolant and at least one inverter of the vehicle.

### Claim 10 (depends on 1)

A thermoregulation system according to claim 1, wherein the first branch comprises a heat exchanger configured for exchanging heat with at least one low temperature power electronics component of the electrical vehicle.

### Claim 11 (depends on 1)

A thermoregulation system according to claim 1, wherein the thermoregulation system comprises at least one control unit adapted to control various working parameters of the thermoregulation system.

### Claim 12 (depends on 11)

A thermoregulation system according to claim 11, wherein said at least one control unit is adapted to control at least one of:
the pump,
a fan accelerating air passage in the main exchanger,
a valve allowing coolant circulation in a bypass line allowing deactivation of coolant circulation in the main exchanger,
a heating system connected to the second branch and adapted to heat up a conditioned air flow circulating in a driver cabin of the vehicle.

### Claim 13 (depends on 1)

An electrically driven vehicle comprising at least one electric machine, at least one battery for storing electrical energy for powering said at least one electric machine, and at least one power electronics component, wherein it comprises a thermoregulation system according to claim 1.