# US 12,005,809 B2 · Method for the thermal conditioning of traction batteries

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- Number: US 12,005,809 B2
- Document ID: US12005809B2
- Status: Granted
- Kind: B2
- Application number: 17/510,097
- Filed: 2021-10-25
- Published: 2022-04-28
- Granted: 2024-06-11
- Earliest claimed: 2020-10-26
- Assignees: Audi AG
- Applicants: Audi AG
- Inventors: Martin Mühleisen; Markus Ruf
- Web page: https://patentgrep.com/patent/US12005809B2

## CPC

- B60L 58/26: by cooling
- B60L 7/10: Dynamic electric regenerative braking (B60L7/22 takes precedence)
- B60L 58/27: by heating
- H01M 10/613: Cooling or keeping cold
- H01M 10/615: Heating or keeping warm
- H01M 10/625: Vehicles
- H01M 10/63: Control systems (charging or discharging in response to temperature H01M10/44 {, H01M10/443}; measurement of temperature H01M10/48 {, H01M10/486})
- H01M 10/633: characterised by algorithms, flow charts, software details or the like
- H01M 10/659: by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
- H01M 10/663: the system being an air-conditioner or an engine
- B60K 6/28: characterised by the electric energy storing means, e.g. batteries or capacitors
- B60L 2240/445: Temperature
- B60L 2240/545: Temperature
- B60L 2240/662: Temperature
- B60L 2240/80: Time limits
- B60Y 2200/92: Hybrid vehicles
- B60Y 2306/05: Cooling
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/72: Electric energy management in electromobility
- Y02T 90/16: Information or communication technologies improving the operation of electric 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
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A method is disclosed for the thermal conditioning of an electrochemical accumulator of a vehicle, wherein data are received and/or ascertained, and the data comprise a planned or expected parking duration, ambient data of the vehicle, thermal properties of the electrochemical accumulator, the received and/or ascertained data are evaluated, and based on the evaluated data steps are taken for the thermal conditioning of the electrochemical accumulator by the control unit prior to a parking of the vehicle, during a parking of the vehicle, or after a parking of the vehicle, wherein the steps for the thermal conditioning of the electrochemical accumulator remove or add thermal energy directly or indirectly to or from the electrochemical accumulator by a battery cooling circuit and/or a main cooling circuit of the vehicle.

## Claims

### Claim 1

A method for thermal conditioning of an electrochemical accumulator of a vehicle, comprising:
receiving and/or ascertaining data including a planned or expected parking duration, ambient data of the vehicle, and thermal properties of the electrochemical accumulator;
evaluating the received and/or ascertained data; and
based on the evaluated data, taking action to thermally condition the electrochemical accumulator after parking of the vehicle in the form of providing thermal energy to the electrochemical accumulator while taking into account a thermal cooldown curve of the electrochemical accumulator and while taking into account the parking duration of the vehicle, and a conditioning duration is ascertained, ending before the expiration of the parking duration, and the steps taken for the thermal conditioning are carried out during the conditioning duration, and wherein the action provides thermal energy to the electrochemical accumulator by a battery cooling circuit and/or a main cooling circuit of the vehicle.

### Claim 2 (depends on 1)

The method according to claim 1, wherein, for the purpose of transferring thermal energy from the main cooling circuit to the electrochemical accumulator, the thermal energy is transferred via a heat exchanger and/or via a heat accumulator between the main cooling circuit and the battery cooling circuit and the thermal energy transferred to the battery cooling circuit is furnished to the electrochemical accumulator.

### Claim 3 (depends on 1)

The method according to claim 1, wherein another action is initiated prior to a parking of the vehicle or during a parking of the vehicle in the form of providing thermal energy to the electrochemical accumulator while taking into account a thermal cooldown curve of the electrochemical accumulator and while taking into account the parking duration of the vehicle, and the electrochemical accumulator is warmed up in such a way that a predefined operating temperature of the electrochemical accumulator is maintained after the parking duration of the vehicle.

### Claim 4 (depends on 1)

The method according to claim 1, wherein a coolant of the battery cooling circuit and/or the main cooling circuit of the vehicle is heated for providing thermal energy by taking up braking recuperation energy in the form of thermal energy and/or by taking up heat from at least one consumer of the vehicle.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the data on a planned or anticipated parking duration are received from a manual entry or ascertained by a self-learning system.

### Claim 6 (depends on 5)

The method according to claim 5, wherein the self-learning system includes a neural net which has been trained in advance.

### Claim 7 (depends on 1)

The method according to claim 1, wherein the method is performed by a control unit of the vehicle.

### Claim 8

A vehicle, comprising:
a main cooling circuit;
a battery cooling circuit; and
at least one electrochemical accumulator, which is coupled thermally to the battery cooling circuit and directly or indirectly to the main cooling circuit, and
wherein the vehicle is adapted to implement a method for thermal conditioning the electrochemical accumulator comprising:
receiving and/or ascertaining data including a planned or expected parking duration, ambient data of the vehicle, and thermal properties of the electrochemical accumulator;
evaluating the received and/or ascertained data; and
based on the evaluated data, taking action to thermally condition the electrochemical accumulator after parking of the vehicle in the form of providing thermal energy to the electrochemical accumulator while taking into account a thermal cooldown curve of the electrochemical accumulator and while taking into account the parking duration of the vehicle, and a conditioning duration is ascertained, ending before the expiration of the parking duration, and the steps taken for the thermal conditioning are carried out during the conditioning duration, and
wherein the action provides thermal energy to the electrochemical accumulator by the battery cooling circuit and/or the main cooling circuit of the vehicle.