Preconditioning of an energy store of a motor vehicle

Patent metadata

Field	Value
Publication number	US-10836258-B2
Application number	US-201816106672-A
Country	US
Kind code	B2
Filing date	Aug 21, 2018
Priority date	Aug 22, 2017
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A control device controls a preconditioning of at least one energy consumer in a motor vehicle and an energy store incorporated in the motor vehicle. The control device is designed to control the energy take-up of the energy consumer and the energy take-up of a charging device incorporated in the motor vehicle such that a difference is generated between the energy take-up of the energy consumer and the energy take-up of the charging device, which is compensated by an energy take-up of the energy store or by a release of energy from the energy store, with the result that the energy store is warmed by the power loss associated with the energy take-up or with the release of energy from the energy store.

First claim

What is claimed is:

1. A control device for controlling a preconditioning of an energy store incorporated in a motor vehicle, comprising: a control device operatively configured to: control an energy take-up of an energy consumer and an energy take-up of a charging device incorporated in the motor vehicle so that a difference is generated between the energy take-up of the energy consumer and the energy take-up of the charging device, compensate a difference generated by an energy take-up of the energy store or by a release of energy from the energy store, whereby the energy store is warmed by power loss associated with the energy take-up of the energy store or with the release of energy from the energy store, and control the energy take-up of the energy consumer such that, in an event of essentially constant energy take-up of the charging device, the energy take-up of the energy consumer exceeds and undershoots the energy take-up of the charging device in an alternating manner.

2. The control device as claimed in claim 1 , wherein
the control device is further configured to:
entirely compensate the difference between the energy take-up of the energy consumer and the energy take-up of the charging device by the energy take-up of the energy store or by the release of energy from the energy store.

3. The control device as claimed in claim 2 , wherein
the control device is further configured to:
control the energy take-up of the charging device such that, in an event of essentially constant energy take-up of the energy consumer, the energy take-up of the charging device exceeds and undershoots the energy take-up of the energy consumer in an alternating manner.

4. The control device as claimed in claim 2 , wherein
the control device is further configured to:
control the energy take-up of the charging device and the energy take-up of the energy consumer such that:
in an event of increasing energy take-up of the charging device, the energy take-up of the energy consumer reduces, and/or
in an event of reducing energy take-up of the charging device, the energy take-up of the energy consumer increases.

5. The control device as claimed in claim 1 , wherein
the control device is further configured to:
control the energy take-up of the charging device such that, in an event of essentially constant energy take-up of the energy consumer, the energy take-up of the charging device exceeds and undershoots the energy take-up of the energy consumer in an alternating manner.

6. The control device as claimed in claim 1 , wherein
the energy consumer is a heating device, an air conditioning system or a cooling device of the motor vehicle.

7. The control device as claimed in claim 1 , wherein
the control device is further configured to:
control the energy take-up of the energy consumer and the energy take-up of the charging device when the motor vehicle is connected to a second charging device which is external to the motor vehicle.

8. A control device for controlling a preconditioning of an energy store incorporated in a motor vehicle, comprising: a control device operatively configured to: control an energy take-up of an energy consumer and an energy take-up of a charging device incorporated in the motor vehicle so that a difference is generated between the energy take-up of the energy consumer and the energy take-up of the charging device, compensate a difference generated by an energy take-up of the energy store or by a release of energy from the energy store, whereby the energy store is warmed by power loss associated with the energy take-up of the energy store or with the release of energy from the energy store, and control the energy take-up of the charging device and the energy take-up of the energy consumer such that: in an event of increasing energy take-up of the charging device, the energy take-up of the energy consumer reduces, and/or in an event of reducing energy take-up of the charging device, the energy take-up of the energy consumer increases.

9. A method for controlling a preconditioning of an energy store incorporated in a motor vehicle, the method comprising the steps of: controlling an energy take-up of an energy consumer and an energy take-up of a charging device incorporated in the motor vehicle such that a difference is generated between the energy take-up of the energy consumer and the energy take-up of the charging device; compensating the difference by an energy take-up of the energy store or by a release of energy from the energy store, whereby the energy store is warmed by power loss associated with the energy take-up or with the release of energy from the energy store, determining a duration of an energy store heat-up phase according to a current temperature of the energy store and a service temperature of the energy store; and controlling the energy take-up of the energy consumer and the energy take-up of the charging device according to a planned departure time and the duration of the energy store heat-up phase such that, at the planned departure time, the energy store achieves the service temperature.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Schweiger Benno
• Kreppold Bernhard
• Maerkl Andreas

Classifications

• B60L58/25

  by controlling the electric load · CPC title

• B60L58/24

  for controlling the temperature of batteries · CPC title

• B60L53/00

  Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles · CPC title

• B60L58/10

  for monitoring or controlling batteries · CPC title

• B60L2240/80

  Time limits · CPC title