# US 8,751,079 B2 · Method and device for controlling a battery pulse heating mode of a traction battery of a hybrid vehicle

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- Number: US 8,751,079 B2
- Document ID: US8751079B2
- Status: Granted
- Kind: B2
- Application number: 13/091,200
- Filed: 2011-04-21
- Published: 2011-11-17
- Granted: 2014-06-10
- Earliest claimed: 2010-05-15
- Assignees: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
- Applicants: Matthias Lederer; Martin Roth; Marco Fleckner
- Inventors: Matthias Lederer; Martin Roth; Marco Fleckner
- Web page: https://patentgrep.com/patent/US8751079B2

## CPC

- B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)}
- B60L 58/27: by heating
- B60W 10/26: for electrical energy, e.g. batteries or capacitors
- B60W 30/192: Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
- G16Z 99/00: Subject matter not provided for in other main groups of this subclass
- H01M 10/486: {for measuring temperature}
- H01M 10/615: Heating or keeping warm
- H01M 10/625: Vehicles
- H01M 10/637: characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching (means for preventing undesired use or discharge H01M50/572)
- B60L 2240/545: Temperature
- B60L 2250/16: by display
- B60W 2510/244: Charge state
- B60W 2510/246: Temperature
- H02J 2105/30: the load networks being external to vehicles, i.e. exchanging power with vehicles
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- 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
- 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
- G16Z: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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 and a device are provided for controlling a battery pulse heating mode of a traction battery of a hybrid vehicle. The method includes detecting a traction battery temperature (T) upon start-up of the hybrid vehicle. The method then includes determining a dependency of fuel consumption (V) during a battery pulse heating mode on the distance (W) travelled for at least one predefined road type at the detected traction battery temperature (T). The method continues by displaying the determined dependency on a display device (50), using an input device (60) to select whether a battery pulse heating mode should be carried out; and controlling the battery pulse heating mode as a function of the selection.

## Claims

### Claim 1

A method for controlling a battery pulse heating mode of a traction battery of a hybrid vehicle having an internal combustion engine and an electric machine, comprising:
starting the hybrid vehicle;
detecting a traction battery temperature of the hybrid vehicle after starting the hybrid vehicle;
determining a distance that must be traveled for a battery pulse heating mode to result in reduced fuel consumption for at least one predefined road type at the detected traction battery temperature;
displaying the determined distance on a display device;
using an input device to select whether a battery pulse heating mode should be carried out; and
controlling the battery pulse heating mode as a function of the selection.

### Claim 2 (depends on 1)

The method of claim 1, wherein the determining step includes determining travel distances at which the battery pulse heating mode will result in reduced fuel consumption during a battery pulse heating mode on the distance travelled for a plurality of predefined road types at the detected traction battery temperature.

### Claim 3 (depends on 2)

The method of claim 2, wherein the displaying step includes displaying all of the determined distances.

### Claim 4 (depends on 2)

The method of claim 2, further comprising establishing a location of the hybrid vehicle, and displaying only distances that are available options on the basis of the established location.

### Claim 5 (depends on 2)

The method of claim 2, wherein the step of determining the distances for a plurality of road types comprises determining dependencies for at least one of motorway, country road, city street.

### Claim 6

A device for controlling a battery pulse heating mode of a traction battery of a hybrid vehicle that has an internal combustion engine and an electric machine, comprising:
a temperature detector for detecting a traction battery temperature of the hybrid vehicle after the hybrid vehicle has been started;
a start state detector for detecting a start state of the hybrid vehicle;
a determining device for determining a distance that must be traveled for a battery pulse heating mode to result in reduced fuel consumption of the internal combustion engine for at least one predefined road type at the detected traction battery temperature;
a display device for displaying the determined distance;
an input device for selecting whether the battery pulse heating mode should be carried out; and
a control device for controlling the battery pulse heating mode as a function of a control signal that can be generated on the basis of an input at the input device.

### Claim 7 (depends on 6)

The device of claim 6, wherein the determining device is configured for determining distances at which the battery pulse heating mode will result in reduced fuel consumption for a plurality of predefined road types at the detected traction battery temperature.

### Claim 8 (depends on 7)

The device of claim 7, further comprising a location establishing device for establishing a location of the hybrid vehicle, and the determining device being configured to determine and display only the distances preselected on the basis of the established location.

### Claim 9 (depends on 7)

The device of claim 7, wherein determining device determines the road type as one of a motorway, a country road or a city street.

### Claim 10 (depends on 6)

The device of claim 6, further comprising a second input device for correcting a selection.