Vehicle battery controller based on a reduced order model

Patent metadata

Field	Value
Publication number	US-11034243-B2
Application number	US-201816167036-A
Country	US
Kind code	B2
Filing date	Oct 22, 2018
Priority date	Oct 22, 2018
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A vehicle battery controller based on a reduced order model is provided. The controller identifies a value of a current output by the battery that supplies power to the vehicle. The controller provides the value of the current to a solid diffusion component, an electrolyte transport component, and a electrolyte and solid potential component. The solid diffusion component can update a solid concentration model of the battery. The electrolyte transport component can update an electrolyte concentration model of the battery. The electrolyte and solid potential component can update an electrolyte potential model and a solid potential model of the battery. The controller component can determine a value of a voltage of the battery and a value of a heat generation rate of the battery. The controller component can generate a command to manage a performance of the battery.

First claim

The invention claimed is:

1. A system to manage battery performance of a vehicle, comprising:
a battery management system of the vehicle comprising one or more processors and memory;
a database of the battery management system storing a profile for a battery of the vehicle;
a sensor of the vehicle to identify a value of a current output by the battery that supplies power to the vehicle;
a battery controller of the battery management system to:
determine, based on the value of the current output and the profile and via a solid concentration model updated by a solid diffusion component, an electrolyte concentration model updated by an electrolyte transport component, an electrolyte potential model updated by an electrolyte and solid potential component, and a solid potential model updated by the electrolyte and solid potential component, a value of a voltage of the battery and a value of a heat generation rate of the battery; and
generate, based on the value of the voltage of the battery and the value of the heat generation rate of the battery, a command; and

provide the command to one or more component of the vehicle to cause a change in usage of the battery.

2. The system of claim 1 , comprising:
the battery controller to generate the command comprising an instruction to reduce the value of the current output by the battery.

3. The system of claim 1 , comprising:
the battery controller to generate the command comprising an indication of remaining battery power to display via a display device of the vehicle.

4. The system of claim 1 , comprising:
the battery controller to terminate, responsive to the value of the heat generation rate being greater than a threshold, current output from one or more cells of the battery.

5. The system of claim 1 , comprising:
the battery controller to terminate, responsive to the value of the heat generation rate being greater than a threshold, charging of one or more cells of the battery.

6. The system of claim 1 , wherein the battery comprises a lithium-ion battery, comprising;
the battery management system to utilize a reduced order model configured for the lithium-ion battery to update at least one of the solid concentration model, the electrolyte concentration model, the electrolyte potential model, or the solid potential model.

7. The system of claim 1 , wherein the vehicle comprises an electrical vehicle, comprising:
the battery management system to generate the command in real-time responsive to the value of the current output.

8. The system of claim 1 , comprising:
the battery management system to update, based on a uniform current density across an electrode thickness of the battery, the solid concentration model, the electrolyte concentration model, the electrolyte potential model, and the solid potential model.

9. The system of claim 1 , wherein the profile comprises electrochemical parameters for the battery comprising at least one of a particle size, an electrode thickness, a porosity, or an open circuit voltage.

10. The system of claim 1 , wherein the value of the current output is based on a time-dependent function.

11. The system of claim 1 , comprising:
the battery management system to update the solid concentration model of the battery based on at least one of a finite difference technique, a finite volume technique, or a finite element technique, wherein the solid concentration model comprises a polynomial profile; and
the battery management system to determine a solid concentration-dependent solid diffusivity of the battery.

12. The system of claim 1 , comprising:
the battery management system to update the electrolyte concentration model of the battery based on an electrolyte activity coefficient.

13. The system of claim 1 , comprising:
the battery controller to determine the value of the voltage of the battery based on an open circuit voltage hysteresis effect, wherein the open circuit voltage hysteresis effect is based on a difference between a charging open circuit voltage curve and a discharging open circuit voltage curve.

14. The system of claim 1 , comprising the battery controller to:
determine at least one of an electrolyte ohmic heat, a solid ohmic heat, a reaction heat, or a reversible heat, wherein the heat generation rate is based on each of the electrolyte ohmic heat, the solid ohmic heat, the reaction heat, and the reversible heat; and
provide a separate indication for one or more of the electrolyte ohmic heat, the solid ohmic heat, the reaction heat, or the reversible heat.

15. The system of claim 1 , comprising:
the battery management system to provide, for display via a display device, a particle concentration profile and an electrolyte concentration profile of the battery.

16. A method of managing battery performance of a vehicle, comprising:
retrieving, by a battery management system of the vehicle comprising one or more processors and memory, from a database, a profile for a battery of the vehicle;
identifying, by a sensor of the vehicle, a value of a current output by the battery that supplies power to the vehicle;
determining, by a battery controller of the battery management system, based on the value of the current output and the profile and via a solid concentration model, an electrolyte concentration model, an electrolyte potential model, and a solid potential model, a value of a voltage of the battery and a value of a heat generation rate of the battery;
generating, by the battery controller, based on the value of the voltage of the battery and the value of the heat generation rate of the battery, a command; and
providing the command to one or more component of the vehicle to cause a change in usage of the battery.

17. The method of claim 16 , comprising:
generating, by the battery controller, the command comprising an instruction to reduce the value of the current output by the battery.

18. The method of claim 16 , comprising:
generating, by the battery controller, the command comprising an indication of remaining battery power to display via a display device of the vehicle.

19. The method of claim 16 , comprising:
terminating, by the battery controller responsive to the value of the heat generation rate being greater than a threshold, current output from one or more cells of the battery.

20. The method of claim 16 , comprising:
terminating, by the battery controller responsive to the value of the heat generation rate being greater than a threshold, charging of one or more cells of the battery.

Assignees

• Sf Motors Inc
• Chongqing Jinkang New Energy Vehicle Co Ltd

Inventors

• Wu Bin
• Liu Ying
• Tang Yifan

Classifications

• H01M10/48

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• B60L3/0046 Primary

  relating to electric energy storage systems, e.g. batteries or capacitors · CPC title

• B60L2260/42

  by adaptive correction · CPC title

• B60L2260/50

  by future state prediction · CPC title