# US 10,766,338 B2 · HVAC system of vehicle with battery heating and cooling

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- Number: US 10,766,338 B2
- Document ID: US10766338B2
- Status: Granted
- Kind: B2
- Application number: 15/943,761
- Filed: 2018-04-03
- Published: 2019-06-13
- Granted: 2020-09-08
- Earliest claimed: 2017-12-08
- Assignees: Hyundai Motor Company; Kia Motors Corporation
- Applicants: Hyundai Motor Company; Kia Motors Corporation
- Inventors: Man Ju Oh; Jae Woong Kim; Sang Shin Lee
- Web page: https://patentgrep.com/patent/US10766338B2

## CPC

- B60H 1/00899: {Controlling the flow of liquid in a heat pump system (controlling the properties of the refrigerant liquid, e.g. pressure or temperature, B60H1/3204)}
- B60H 1/00278: {for the battery}
- B60H 1/00392: {for electric vehicles having only electric drive means}
- B60L 58/26: by cooling
- B60L 58/27: by heating
- B60H 2001/00307: {Component temperature regulation using a liquid flow}
- B60H 2001/00928: {comprising a secondary circuit}
- B60H 2001/00942: {comprising a plurality of heat exchangers, e.g. for multi zone heating or cooling}
- 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
- 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

An HVAC system of a vehicle includes: a battery line configured to thermally interconnect a first radiator and a high-voltage battery core and provided with a first pump; a refrigerant line having a compressor, a condenser, and an evaporator; an indoor cooling line interconnecting an indoor HVAC cooling core and the evaporator and having a second pump; an indoor heating line thermally interconnecting an indoor HVAC heating core and a condenser and having a third pump; battery cooling lines branching from opposite side points of the high-voltage battery core in the battery line, respectively, and connected to the indoor cooling line; battery heating lines branching from the opposite side points of the high-voltage battery core in the battery line, respectively, and connected to the indoor heating line; and a first valve disposed at one of the opposite branching points in the battery line.

## Claims

### Claim 1

A Heating, Ventilation and Air Conditioning (HVAC) system of a vehicle, comprising:
a battery line thermally interconnecting a first radiator and a battery core, the battery line having a first pump connected such that a coolant flows in the battery line;
a refrigerant line having a compressor, a condenser, and an evaporator, the refrigerant line having refrigerant flowing therein;
an indoor cooling line thermally interconnecting an indoor HVAC cooling core and the evaporator, the indoor cooling line having a second pump connected such that the coolant flows in the indoor cooling line;
an indoor heating line thermally interconnecting an indoor HVAC heating core and the condenser, the indoor heating line having a third pump connected therethrough such that the coolant flows in the indoor heating line;
battery cooling lines branching from opposite side points of the battery core in the battery line, respectively, and connected to the indoor cooling line such that the coolant, which exchanges heat with the evaporator, flows to the battery core;
battery heating lines branching from the opposite side points of the battery core in the battery line, respectively, and connected to the indoor heating line such that coolant, which exchanges heat with the condenser, flows to the battery core; and
a first valve disposed at one of the opposite branching points in the battery line and configured to control flow of the coolant in the battery line, the indoor cooling line, and the indoor heating line.

### Claim 2 (depends on 1)

The HVAC system of claim 1, wherein the indoor cooling line has a low-temperature heat exchanger to exchange heat with the evaporator in the refrigerant line.

### Claim 3 (depends on 2)

The HVAC system of claim 2, wherein the indoor cooling line has a second valve, and includes an outside air cooling line, one end of which branches from the second valve and a remaining end of which is connected to the first radiator and is then connected to the indoor cooling line.

### Claim 4 (depends on 1)

The HVAC system of claim 1, wherein the indoor cooling line and the outside air cooling line selectively connect the first radiator, the low-temperature heat exchanger, and the indoor HVAC cooling core by the second valve, thereby performing cooling of the battery core or indoor cooling.

### Claim 5 (depends on 3)

The HVAC system of claim 3, wherein the indoor heating line has a third valve, a second radiator, and an outside air heating line,
wherein one end of the outside air heating line branches from the third valve and a remaining end of the outside air heating line is connected to the second radiator and is then connected to the indoor heating line,
wherein the outside air cooling line has a fourth valve, a third radiator, and an electric component cooling line,
wherein one end of the electric component cooling line branches from the fourth valve and a remaining end of the electric component cooling line is connected to the third radiator and is then connected to the outside air cooling line, and
wherein the electric component cooling line has an electric component core connected thereto.

### Claim 6 (depends on 5)

The HVAC system of claim 5, wherein the electric component cooling line has a fourth pump that is driven or stopped by a controller.

### Claim 7 (depends on 5)

The HVAC system of claim 5, wherein, in a case of an outdoor cooling mode, the controller controls the first valve and the fourth valve to circulate the coolant in the battery line and the electric component cooling line, so that the battery core is cooled by the first radiator, and the electric component core is cooled by the third radiator.

### Claim 8 (depends on 5)

The HVAC system of claim 5, wherein the indoor heating line has a high-temperature heat exchanger so as to exchange heat with the condenser in the refrigerant line.

### Claim 9 (depends on 8)

The HVAC system of claim 8, wherein the indoor heating line and the outside air heating line selectively connect the second radiator, the high-temperature heat exchanger, and the indoor HVAC heating core via the third valve, thereby performing heating of the h battery core or indoor heating.

### Claim 10 (depends on 8)

The HVAC system of claim 8, wherein, in a case of a battery cooling mode, the controller operates the compressor to circulate the refrigerant in the refrigerant line, controls the first valve and the third valve to circulate the coolant in the outside air heating line thermally connected to the refrigerant line, and connects the battery cooling line, which is thermally connected to the refrigerant line, to the battery line and a portion of the indoor cooling line, so that the cooled coolant circulates to perform cooling of the battery core.

### Claim 11 (depends on 8)

The HVAC system of claim 8, wherein, in a case of an indoor cooling and battery cooling mode, the controller operates the compressor to circulate the refrigerant in the refrigerant line, controls the first valve and the third valve to circulate the coolant in the outside air heating line which is thermally connected to the refrigerant line, and connects the battery cooling line thermally connected to the refrigerant line to the battery line and a portion of the indoor cooling line, so that the cooled coolant circulates in the indoor cooling line, thereby performing indoor cooling and cooling of the battery core.

### Claim 12 (depends on 11)

The HVAC system of claim 11, wherein, in a case of an indoor cooling mode, the controller operates the compressor to circulate the refrigerant in the refrigerant line, controls the third valve to circulate the coolant in the outside air heating line thermally connected to the refrigerant line, and circulates the coolant in the indoor cooling line thermally connected to the refrigerant line, thereby performing indoor cooling.

### Claim 13 (depends on 1)

The HVAC system of claim 1, wherein, in a case of a dehumidification mode, the controller operates the compressor to circulate the refrigerant in the refrigerant line, controls the third valve to circulate the coolant in the indoor heating line thermally connected to the refrigerant line, and circulates the coolant in the indoor cooling line that is thermally connected to the refrigerant line, thereby performing dehumidification.

### Claim 14 (depends on 1)

The HVAC system of claim 1, wherein the indoor HVAC cooling core and the indoor HVAC heating core are adjacent to each other.

### Claim 15 (depends on 1)

The HVAC system of claim 1, wherein the indoor heating line further includes a water heater controlled by the controller.