Method and system for distributing a recuperation for a vehicle

• US 9,126,498 B2
• Filed: 06/09/2014
• Issued: 09/08/2015
• Est. Priority Date: 06/10/2013
• Status: Active Grant

• Current Assignee: Volkswagen AG
• Original Assignee: Volkswagen AG
• Inventors: Schrder, Hendrik, We, Alexander
• Primary Examiner(s): Tarcza, Thomas
• Assistant Examiner(s): Dunn, Alex C
• Application Number:
  US14/299,769
• Publication Number:
  US 20140365075A1
• Time in Patent Office: 456 Days
• Field of Search: 701/36
• US Class Current: 1/1
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 1/08 Methods and devices for control or regulation
• CPC Class Codes: B60L 2240/34 Cabin temperature
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 58/13 Maintaining the SoC within a determined range
• CPC Class Codes: B60L 58/14 Preventing excessive discharging
• CPC Class Codes: B60L 58/25 by controlling the electric load
• CPC Class Codes: B60L 7/18 Controlling the braking effect B60L7/12, B60L7/14, B60L7/16 take precedence
• CPC Class Codes: B60L 7/22 Dynamic electric resistor braking, combined with dynamic electric regenerative braking
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 10/30 including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2552/20 Road profile, i.e. the change in elevation or curvature of a plurality of continuous road segments
• CPC Class Codes: B60W 2710/305 target power to auxiliaries
• CPC Class Codes: B60W 30/18127 Regenerative braking
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: H02J 1/14 Balancing the load in a network
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

A method to distribute recuperation power for a vehicle including determining the recuperation power, detecting a respective setpoint power of at least one energy consumer, distributing the recuperation power to electrical energy sinks, which comprise an energy store and the at least one energy consumer, depending on the respective setpoint power of the at least one energy consumer, to the energy sinks such that an average actual power of the at least one energy consumer corresponds to the respective setpoint power of the at least one energy consumer.

Claims

1. A method for distributing recuperation power for a vehicle, the method comprising:

determining the recuperation power;

detecting a respective setpoint power of at least one energy consumer; and

distributing the recuperation power to electrical energy sinks, the electrical energy sinks comprising an energy store and the at least one energy consumer,

wherein the distribution is performed depending on the respective setpoint power of the at least one energy consumer, such that an average actual power of the at least one energy consumer corresponds to the respective setpoint power of the at least one energy consumer, wherein prioritization of the energy sinks is performed depending on one of the following items of information in order to distribute the recuperation power depending on the prioritization;

an external temperature,

system temperatures,

a state of charge of the energy store, and

a degree of efficiency exhibited by the respective energy sink when a power which is supplied to the respective energy sink is converted into another form of energy or when the supplied power is stored and output again.

2. The method of claim 1, wherein the at least one energy consumer is intermittently either not supplied with power at all or is supplied with a power which corresponds to a level of power consumption by the respective energy consumer which is optimized in respect of the degree of efficiency.

3. The method of claim 1, wherein a distance of travel which is intended to be covered by the vehicle in the future is determined;

and the recuperation power is distributed to the consumers depending on the distance of travel.

4. The method of claim 1, wherein a charge current of the energy store is kept below a predetermined threshold value which lies below the maximum charge current of the energy store.

5. The method of claim 1, wherein the at least one energy consumer is supplied with power from the energy store if no recuperation power is available.

6. The method of claim 1, wherein a discharge current of the energy store is kept below a predetermined threshold value which lies below the maximum discharge current of the energy store.

7. The method of claim 1, wherein a temperature of the energy store is detected, and a power which is requested by a drive motor of the vehicle is detected, and a discharge current of the energy store is set higher than corresponds to the requested power if the temperature lies below a predetermined temperature threshold value.

9. The system of claim 8, wherein the system carries out the method of claim 1.

8. A system for a vehicle,

the system comprising:

a control-controller; and

a plurality of electrical energy sinks of the vehicle,

wherein the energy sinks comprise an energy store and at least one energy consumer,

wherein the control controller is designed to determine a recuperation power, to detect a respective setpoint power of the at least one energy consumer, and to distribute the recuperation power to the energy sinks depending on the respective setpoint power of the at least one energy consumer in such a way that an average actual power of the at least one energy consumer corresponds to the respective setpoint power of the at least one energy consumer;

wherein prioritization of the energy sinks is performed depending on one of the following items of information in order to distribute the recuperation power depending on the prioritization;

an external temperature,

system temperatures,

a state of charge of the energy store, and

a degree of efficiency exhibited by the respective energy sink when a power which is supplied to the respective energy sink is converted into another form of energy or when the supplied power is stored and output again.