Energy management device and method for providing an estimated energy value for an energy store

Patent metadata

Field	Value
Publication number	US-12434594-B2
Application number	US-202218554154-A
Country	US
Kind code	B2
Filing date	Feb 23, 2022
Priority date	Apr 13, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

The invention relates to an energy management device ( 100 ) for an energy store ( 106 ), comprising an energy store ( 106 ), an energy storage management apparatus ( 103 ) and an energy estimation apparatus ( 104 ), wherein the energy storage management apparatus ( 103 ) is designed to detect and provide a plurality of energy storage parameters present in the energy store ( 106 ), wherein the energy estimation apparatus ( 104 ) is designed to receive the plurality of energy storage parameters and to provide an estimated energy value from the plurality of energy storage parameters, characterised in that the energy estimation apparatus ( 104 ) selects substantially only electric current parameters from the provided plurality of energy storage parameters and wherein an electric current parameter is a parameter which has an influence on the electric current flow into and/or out of the energy store ( 106 ).

First claim

The invention claimed is:

1. An energy management device for an energy storage device, comprising
an energy storage device;
an energy storage management apparatus;
an energy estimation apparatus; and
a range estimation apparatus;
wherein the energy storage management apparatus is adapted to detect and provide a plurality of energy storage parameters present in the energy storage device;
wherein the energy estimation apparatus is adapted to receive the plurality of energy storage parameters and to provide an estimated energy value from the plurality of energy storage parameters;
wherein the energy estimation apparatus selects substantially only electric current parameters from the provided plurality of energy storage parameters;
wherein an electric current parameter is a parameter which has an influence on the electric current flow into and/or out of the energy storage device;
wherein the range estimation apparatus is adapted to convert the estimated energy value into an estimation range;
wherein the range estimation apparatus uses an energy-range curve for converting the estimated energy value into the range, which energy-range curve is represented in electric current parameters;
wherein the energy-range curve has a first and a second curve portion;
wherein the second curve portion of the energy-range curve, which lies in the range of a low energy present in the energy storage device, has been determined with a higher accuracy than the first curve portion of the energy-range curve, which lies in the range of a high energy present in the energy storage device; and
wherein the first curve portion is adapted to the second curve portion such that the energy- range curve forms a continuous curve.

2. The energy management device according to claim 1 , wherein the electric current parameter is at least one energy storage parameter selected from the group of energy storage parameters consisting of:
electric current balancing value;
electrical resistance of the energy storage device;
instantaneous voltage at the energy storage device;
instantaneous electric current at the energy storage device;
energy storage device temperature;
age of the energy storage device; and
inter-cell voltage difference of individual cells of the energy storage device.

3. The energy management device according to claim 1 , wherein a transition from the first curve portion to the second curve portion of the energy-range curve depends upon at least one transition criterion selected from the group of transition criteria consisting of:
an operating time;
a state of charge of the energy storage device;
a minimum distance to a destination; and
a trigger event.

4. The energy management device according to claim 1 , wherein the energy estimation apparatus is set up to predict the temperature of the energy storage device and/or the internal resistance of the energy storage device.

5. The energy management device according to claim 1 , further comprising:
a display apparatus;
wherein the display apparatus is configured to display the estimated range.

6. Transport means having an energy management device according to claim 1 .

7. A method for providing an estimated energy value of an energy storage device, comprising: detecting a plurality of energy storage parameters present in the energy storage device; providing the plurality of detected energy storage parameters present in the energy storage device;
receiving the plurality of energy storage parameters; providing an estimated energy value from the plurality of energy storage parameters; wherein, the step of providing the estimated energy value comprises selecting substantially only electric current parameters; and wherein an electric current parameter is a parameter which has an influence on the electric current flow into and/or out of the energy storage device; the method further including a step of converting the energy estimate into an estimated range; wherein an energy-range curve represented in current parameters is used to convert the energy estimate into the range; wherein the energy-range curve has a first and a second curve portion;
wherein the second curve portion of the energy-range curve, which lies in the range of a low energy present in the energy storage device, has been determined with a higher accuracy than the first curve portion of the energy-range curve, which lies in the range of a high energy present in the energy storage device; and
wherein the first curve portion is adapted to the second curve portion such that the energy range curve forms a continuous curve.

Assignees

• Psa Automobiles Sa

Inventors

• Pochner Klaus

Classifications

• H02J7/80

  including monitoring or indicating arrangements · CPC title

• B60L2260/52

  drive range estimation, e.g. of estimation of available travel distance · CPC title

• G01R31/387

  Determining ampere-hour charge capacity or SoC · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title