SYSTEM AND METHOD OF CHARGING BATTERY

• US 20170054316A1
• Filed: 08/21/2015
• Published: 02/23/2017
• Est. Priority Date: 08/21/2015
• Status: Abandoned Application

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Francis-Buller, Igor A.
• Application Number:
  US14/832,375
• Publication Number:
  US 20170054316A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 2310/46 for ICE-powered road vehicles
• CPC Class Codes: H02J 7/0069 Charging or discharging for charge maintenance, battery initiation or rejuvenation
• CPC Class Codes: H02J 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: H02J 7/007192 in response to temperature
• CPC Class Codes: H02J 7/007194 of the battery
• CPC Class Codes: H02J 7/14 for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle

Abstract

A smart control system for charging a battery is provided. The smart control system includes a charging system electrically coupled to the battery to provide an output to the battery. The smart control system also includes a control module communicably coupled to the charging system and the battery. The control module is configured to monitor at least one of a state of health (SOH) of the battery and a state of charge (SOC) of the battery. The control module is also configured to monitor a temperature of the battery. The control module is further configured to control the output provided by the charging system to the battery based on the monitored temperature and at least one of the SOH and the SOC of the battery.

Claims

1. A smart control system for charging a battery, the smart control system comprising:

a charging system electrically coupled to the battery to provide an output to the battery;

a control module communicably coupled to the charging system and the battery, the control module configured to;

monitor at least one of a state of health (SOH) of the battery, and a state of charge (SOC) of the battery;

monitor a temperature of the battery; and

control the output provided by the charging system to the battery based on the monitored temperature and at least one of the SOH and the SOC of the battery.

2. The smart control system of claim 1, wherein the charging system is an alternator.

3. The smart control system of claim 1, wherein the control module is further configured to:

monitor a voltage of the battery and a current of the battery; and

control the output provided to the battery further based on at least one of the voltage and the current.

4. The smart control system of claim 1, wherein the control module is further configured to operate the battery in one of an equalization state, an absorption state and a bulk charge state based on the monitored temperature and at least one of the SOH and the SOC of the battery.

5. The smart control system of claim 4, wherein the control module is further configured to:

determine a first SOC range and a second SOC range based at least on the SOH of the battery, the first SOC range greater than the second SOC range;

determine a first voltage range and a second voltage range less than the first voltage range;

operate the battery in the equalization state if the SOC falls in the first SOC range and a voltage of the battery falls in the first voltage range;

operate the battery in the absorption state if the SOC falls in the second SOC range and the voltage falls in the second voltage range;

operate the battery in the bulk charge state if the SOC is less than the second SOC range and the voltage is less than the second voltage range.

6. The smart control system of claim 4, wherein the control module is further configured to:

determine a maximum voltage for the battery for each of the corresponding equalization state, the absorption state or the bulk charge state based at least on the monitored temperature; and

control the output provided to the battery to reach the maximum voltage for the respective equalization state, the absorption state and the bulk charge state.

7. The smart control system of claim 6, wherein the control module is further configured to switch from the absorption state to the equalization state if a voltage of the battery reaches the corresponding maximum voltage limit and a current of the battery is less than a first current limit.

8. The smart control system of claim 6, wherein the control module is further configured to switch from the bulk charge state to the absorption state if a voltage of the battery reaches the corresponding maximum voltage limit and a current of the battery is less than a second current limit.

9. The smart control system of claim 1, wherein the battery is configured to provide electrical power to an engine and a micro-grid.

10. A method of charging a battery electrically connected to a charging system, the method comprising:

providing an output from the charging system to the battery;

monitoring at least one of a state of health (SOH) of the battery and a state of charge (SOC) of the battery;

monitoring a temperature of the battery; and

controlling the output provided to the battery based on the monitored temperature and at least one of the SOH and the SOC of the battery.

11. The method of claim 10, wherein the output is a charging current provided by the charging system.

12. The method of claim 10 further comprising:

monitoring a voltage of the battery and a current of the battery; and

controlling the output provided to the battery further based on at least one of the voltage and the current of the battery.

13. The method of claim 10 further comprising:

determining a maximum voltage for the battery based at least on the monitored temperature of the battery; and

providing the output to the battery until a voltage of the battery reaches the maximum voltage.

14. The method of claim 10 further comprising operating the battery in one of an equalization state, an absorption state and a bulk charge state based on the monitored temperature and at least one of the SOH and the SOC of the battery.

15. The method of claim 14 further comprising:

determining a first SOC range and a second SOC range based at least on the SOH of the battery, the second SOC range less than the second SOC range;

determining a first voltage range and a second voltage range less than the first voltage range;

operating the battery in the equalization state if the SOC falls in the first SOC range and a voltage of the battery falls in the first voltage range;

operating the battery in the absorption state if the SOC falls in the second SOC range and the voltage falls in the second voltage range;

operating the battery in the bulk charge state if the SOC is less than the second SOC range and the voltage is less than the second voltage range.

16. The method of claim 10, wherein the battery is configured to provide electrical power to an engine.

17. The method of claim 14 further comprising:

switching from the absorption state to the equalization state if a voltage of the battery reaches the corresponding maximum voltage limit and a current of the battery is less than a first current limit;

switching from the bulk charge state to the absorption state if a voltage of the battery reaches the corresponding maximum voltage limit and a current of the battery is less than a second current limit.

18. A method of charging a battery, the method comprising:

providing a charging current to the battery in one of an equalization state, an absorption state and a bulk charge state;

monitoring a plurality of charging parameters of the battery, the plurality of charging parameters comprising a state of charge (SOC), a state of health (SOH), a temperature, a voltage, and a current of the battery;

determining a first SOC range and a second SOC range based at least on the SOH of the battery, the second SOC range less than the second SOC range;

determining a first voltage range and a second voltage range less than the first voltage range;

operating the battery in the equalization state if the SOC falls in the first SOC range and the voltage of the battery falls in the first voltage range;

operating the battery in the absorption state if the SOC falls in the second SOC range and the voltage falls in the second voltage range; and

operating the battery in the bulk charge state if the SOC is less than the second SOC range and the voltage is less than the second voltage range.

19. The method of claim 18 further comprising:

determining a maximum voltage for the battery for each of the corresponding equalization state, the absorption state or the bulk charge state based at least on the monitored temperature; and

controlling the charging current provided to the battery to reach the respective maximum voltage for the equalization state, the absorption state and the bulk charge state.

20. The method of claim 18, wherein the battery is configured to provide power to an engine.