Vehicle battery controller based on a reduced order model

• US 10,449,861 B1
• Filed: 12/26/2018
• Issued: 10/22/2019
• Est. Priority Date: 10/22/2018
• Status: Active Grant

• Current Assignee: Chongqing Jinkang New Energy Vehicle Co., Ltd. (SERES Group Co., Ltd.), SF Motors, Inc. (SERES Group Co., Ltd.)
• Original Assignee: Chongqing Jinkang New Energy Vehicle Co., Ltd. (SERES Group Co., Ltd.)
• Inventors: Wu, Bin, Liu, Ying, Tang, Yifan
• Primary Examiner(s): Beaulieu, Yonel
• Application Number:
  US16/232,980
• Time in Patent Office: 300 Days
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 2260/42 by adaptive correction
• CPC Class Codes: B60L 2260/44 by parameter estimation
• CPC Class Codes: B60L 2260/50 by future state prediction
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 58/10 for monitoring or controlling batteries
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0566 Liquid materials
• CPC Class Codes: H01M 10/48 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 Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

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.

Claims

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 solid diffusion component of the battery management system to;

update, based on the value of the current and the profile, a solid concentration model of the battery;

an electrolyte transport component of the battery management system to;

update, based on the value of the current and the profile, an electrolyte concentration model of the battery;

an electrolyte and solid potential component to;

update, based on the value of the current and the profile, an electrolyte potential model of the battery; and

update, based on the value of the current and the profile, a solid potential model of the battery;

a battery controller component of the battery management system to;

determine, based on the solid concentration model updated by the solid diffusion component, the electrolyte concentration model updated by the electrolyte transport component, the electrolyte potential model updated by the electrolyte and solid potential component, and the 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 to manage a performance of the battery.

2. The system of claim 1, comprising:

the battery controller component 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 component 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 component 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 component 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.

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 is based on a time-dependent function.

11. The system of claim 1, comprising:

the solid diffusion component 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 solid diffusion component to determine a solid concentration-dependent solid diffusivity of the battery.

12. The system of claim 1, comprising:

the electrolyte transport component 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 component 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 component 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;

updating, by the battery management system, based on the value of the current and the profile, a solid concentration model of the battery;

updating, by the battery management system, based on the value of the current and the profile, an electrolyte concentration model of the battery;

updating, by the battery management system, based on the value of the current and the profile, an electrolyte potential model of the battery; and

updating, by the battery management system based on the value of the current and the profile, a solid potential model of the battery;

determining, by a battery controller component of the battery management system, based on the solid concentration model, the electrolyte concentration model, the electrolyte potential model, and the solid potential model, a value of a voltage of the battery and a value of a heat generation rate of the battery; and

generating, by the battery controller component, based on the value of the voltage of the battery and the value of the heat generation rate of the battery, a command to manage a performance of the battery.

17. The method of claim 16, comprising:

generating, by the battery controller component, 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 component, 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 component 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 component responsive to the value of the heat generation rate being greater than a threshold, charging of one or more cells of the battery.