SYSTEM AND METHOD OF MONITORING A PERFORMANCE LEVEL OF A BATTERY

• US 20150239364A1
• Filed: 02/21/2014
• Published: 08/27/2015
• Est. Priority Date: 02/21/2014
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Baughman, Andrew C., Grenn, Daniel P., Zettel, Andrew M.
• Granted Patent: US 9,428,073 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 15/20 for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/443 Torque
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2260/26 Transition between different drive modes
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/13 Maintaining the SoC within a determined range
• CPC Class Codes: B60L 58/21 having the same nominal voltage
• CPC Class Codes: B60L 58/24 for controlling the temperature of batteries
• CPC Class Codes: G01N 27/416 Systems G01N27/27 takes precedence
• CPC Class Codes: G07C 5/0808 Diagnosing performance data testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005
• CPC Class Codes: G07C 5/0841 Registering performance data recording measured values G01D; information storage G11B
• CPC Class Codes: G08B 21/00 Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
• CPC Class Codes: H02J 7/00 : Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility

Abstract

A method of monitoring a performance level of a battery of a vehicle having an electronic control unit (ECU) includes enabling a charging diagnostic module (CDM) and determining, with the CDM, a charging status of the battery. The method also includes enabling a discharging diagnostic module (DDM) and determining, with the DDM, a discharging status of the battery. The charging status and the discharging status are recorded in a memory location of the ECU.

Claims

1. A method for monitoring a performance level of a battery of a vehicle having an electronic control unit (ECU), comprising:

enabling a charging diagnostic module (CDM);

determining, with the CDM, a charging status of the battery;

enabling a discharging diagnostic module (DDM);

determining, with the DDM, a discharging status of the battery; and

recording the charging status and the discharging status in a memory location of the ECU.

2. The method of claim 1, wherein enabling a CDM and enabling a DDM are simultaneous.

3. The method of claim 1, further comprising retrieving values of the battery from a memory location of the ECU.

4. The method of claim 3, wherein enabling a CDM is further defined as enabling a CDM as a function of the values retrieved from the memory location of the ECU meeting predefined conditions;

and

wherein enabling a DDM is further defined as enabling a DDM as a function of the values retrieved from the memory location of the ECU meeting predefined conditions.

5. The method of claim 3, wherein the values include at least one of a voltage, a state of charge, a minimum battery temperature, a maximum battery temperature, and a current of the battery.

6. The method of claim 5, wherein the values further include a calculated charging power limit of the battery.

7. The method of claim 3, further comprising determining that an ignition signal is being received by the ECU.

8. The method of claim 3, wherein determining, with the CDM, a charging status of a battery is further defined as determining, with the CDM, a charging status of the battery, as a function of the values retrieved from the memory location of the ECU;

and

wherein determining, with the DDM, a discharging status of a battery is further defined as determining, with the DDM, a discharging status of the battery, as a function of the values retrieved from the memory location of the ECU.

9. The method of claim 8, wherein the charging status of the battery is determined to be passing only when pass conditions for the CDM are met;

wherein the charging status of the battery is determined to be not passing only when the pass conditions for the CDM are not met;

wherein the discharging status of the battery is determined to be passing only when pass conditions for the DDM are met; and

wherein the discharging status of the battery is determined to be not passing only when the pass conditions for the DDM are not met.

10. The method of claim 9, further comprising:

retrieving the charging status and the discharging status from the memory location;

determining the performance level of the battery as a function of the retrieved charging status and discharging status;

wherein the performance level is determined to be at a performing level when the retrieved charging status and discharging status are each determined to be passing; and

wherein the performance level is determined to not be at a performing level when the retrieved charging status and discharging status are each determined to not be passing.

11. A vehicle comprising:

a battery; and

a controller in communication with the battery;

wherein the controller is configured to;

enable a charging diagnostic module (CDM);

determine, with the CDM, a charging status of the battery;

enable a discharging diagnostic module (DDM);

determine, with the DDM, a discharging status of the battery; and

record the charging status and the discharging status in a memory location of the ECU.

12. The vehicle of claim 11, wherein enabling a CDM is simultaneous with enabling a DDM.

13. The vehicle of claim 11, wherein the controller is further configured to retrieve values of the battery from a memory location of the ECU.

14. The vehicle of claim 13, wherein the controller is configured to enable the CDM as a function of the values retrieved from the memory location of the ECU meeting predefined conditions;

and

wherein the controller is configured to enable the DDM as a function of the values retrieved from the memory location of the ECU meeting predefined conditions.

15. The vehicle of claim 13, wherein the values include at least one of a voltage, a state of charge, a minimum battery temperature, a maximum battery temperature, and a current of the battery.

16. The vehicle of claim 15, wherein the values further include a calculated charging power limit of the battery.

17. The vehicle of claim 13, further comprising an ignition system configured to transmit an ignition signal to the controller in response to receiving an input;

wherein the controller is further configured to determine that an ignition signal is being received by the ECU.

18. The vehicle of claim 13, wherein the controller is further configured to:

determine the charging status of a battery as a function of the values retrieved from the memory location of the ECU; and

determine the discharging status of the battery as a function of the values retrieved from the memory location of the ECU.

19. The vehicle of claim 18, wherein the controller is further configured to:

determine the charging status of the battery to be passing only when pass conditions for the CDM are met;

determine the charging status of the battery to be not passing only when the pass conditions for the CDM are not met;

determine the discharging status of the battery to be passing only when pass conditions for the DDM are met; and

determine the discharging status of the battery to be not passing only when the pass conditions for the DDM are not met.

20. The vehicle of claim 19, wherein the controller is further configured to:

retrieve the charging status and the discharging status from the memory location;

determine the performance level of the battery as a function of the retrieved charging status and discharging status;

wherein the performance level is determined to be at a performing level when the retrieved charging status and discharging status are each determined to be passing; and

wherein the performance level is determined to not be at a performing level when the retrieved charging status and discharging status are each determined to not be passing.