SYSTEM FOR BATTERY PROGNOSTICS

• US 20100312744A1
• Filed: 06/09/2009
• Published: 12/09/2010
• Est. Priority Date: 06/09/2009
• Status: Abandoned Application

• Current Assignee: Toyota Motor Engineering & Manufacturing North America Incorporated (Toyota Motor Corporation)
• Original Assignee: Toyota Motor Engineering & Manufacturing North America Incorporated (Toyota Motor Corporation)
• Inventors: Namburu, Setu Madhavi, Prokhorov, Danil V., Qiao, Liu
• Application Number:
  US12/480,975
• Publication Number:
  US 20100312744A1
• Time in Patent Office: Days
• US Class Current: 706/52
• CPC Class Codes: G01R 31/392 Determining battery ageing or deterioration, e.g. state of health

Abstract

A battery prognosis system for estimating the remaining useful life of a battery includes a sensor input, a conversion module, and a mapping module. The sensor input is capable of receiving a measurement signal from a sensor measuring properties of the battery. The conversion module is in electronic communication with the sensor input to receive the measurement signal and processes the measurement signal into an output signal of internal parameters of the battery. A mapping model trained on actual battery performance data in the mapping module maps the output signal and time variant parameters related to the output signal to generate a battery life signal corresponding to an estimate of the remaining useful life of the battery.

Claims

1. A battery prognostics system for estimating the remaining useful life of a battery, said battery prognostics system comprising:

a sensor input capable of receiving at least one measurement signal from at least one sensor which measures at least one property of the battery;

a conversion module in electronic communication with said sensor input to receive said at least one measurement signal, said conversion module processes said at least one measurement signal into an output signal of internal parameters of the battery; and

a mapping module in electronic communication with said conversion module to receive said output signal, said mapping module uses a mapping model having been trained on actual battery performance data to map said output signal and time variant parameters related to said output signal to generate a battery life signal corresponding to an estimate of the remaining useful life of the battery.

2. The battery prognostics system of claim 1, wherein said time variant parameters relate to the evolution of said output signal.

3. The battery prognostics system of claim 1, wherein said mapping model determines a plurality of intermediate quantities based on said output signal, and wherein said mapping model generates said battery life signal based on said output signal and said plurality of intermediate quantities.

4. The battery prognostics system of claim 1, wherein said sensor input is connected to a temperature sensor to receive a measurement signal related to the temperature of the battery.

5. The battery prognostics system of claim 1, wherein said sensor input is connected to an electrical impedance sensor to receive a measurement signal related to the electrical impedance induced by electrical excitation of the battery.

6. The battery prognostics system of claim 1, wherein said output signal includes the internal parameters of resistance of the battery and capacitance of the battery.

7. The battery prognostics system of claim 3 wherein said plurality of intermediate quantities include an available capacity of the battery.

8. The battery prognostics system of claim 3, wherein said plurality of intermediate quantities include a gauge of the condition of the battery.

9. The battery prognostics system of claim 1, wherein said mapping model is selected from the group consisting of neural networks, machine learning algorithms, and fuzzy logic systems.

18. The method of claim 1, wherein said mapping model is selected from the group consisting of neural networks, machine learning algorithms, and fuzzy logic systems.

10. A method for estimating the remaining useful life of a battery, said method comprising the steps of:

measuring at least one property of the battery so as to produce a measurement signal;

providing a conversion module;

processing said measurement signal in said conversion module so as to generate an output signal of internal parameters of the battery;

providing a mapping module having a mapping model, said mapping model having been trained on actual battery performance data;

processing said output signal and time variant parameters related to said output signal in said mapping module so as to generate a battery life signal corresponding to an estimate of the remaining useful life of the battery.

11. The method of claim 10, wherein said time variant parameters relate to the evolution of said output signal.

12. The method of claim 10, wherein said mapping model determines a plurality of intermediate quantities based on said output signal and processes said plurality of intermediate quantities along with said output signal to generate said battery life signal.

13. The method of claim 10, wherein said measurement signal includes measured properties related to the temperature of the battery.

14. The method of claim 10, wherein said measurement signal includes measured properties related to the electrical impedance induced by electrical excitation of the battery.

15. The method of claim 10, wherein said output signal includes said internal parameters of resistance of the battery and capacitance of the battery.

16. The method of claim 12, wherein said plurality of intermediate quantities include an available capacity of the battery.

17. The method of claim 12, wherein said plurality of intermediate quantities include a gauge of the condition of the battery.