BATTERY MONITORING METHOD AND APPARATUS

• US 20170047745A1
• Filed: 08/11/2015
• Published: 02/16/2017
• Est. Priority Date: 08/11/2015
• Status: Abandoned Application

• Current Assignee: Schneider Electric IT Corporation (Schneider Electric SE)
• Original Assignee: Schneider Electric IT Corporation (Schneider Electric SE)
• Inventors: Chambon, Patrick
• Application Number:
  US14/823,386
• Publication Number:
  US 20170047745A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: G01R 31/40 Testing power supplies testing photovoltaic devices H02S50/10
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 9/062 for AC powered loads
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

According to one aspect, embodiments herein provide an uninterruptible power supply comprising an input configured to receive input power, at least one battery having a state of charge and configured to provide battery power, an output configured to provide output power derived from at least one of the input power and the battery power, and a controller coupled to the battery and configured to generate an expected runtime for the battery based on at least a battery temperature time parameter and a state of charge time parameter.

Claims

1. An uninterruptible power supply comprising:

an input configured to receive input power;

at least one battery having a state of charge and configured to provide battery power;

an output configured to provide output power derived from at least one of the input power and the battery power; and

a controller coupled to the battery and configured to generate an expected runtime for the battery based on at least a battery temperature time parameter and a state of charge time parameter.

2. The uninterruptible power supply of claim 1, wherein the controller is further configured to generate an available state of charge based on at least the expected runtime and the state of charge time parameter.

3. The uninterruptible power supply of claim 2, wherein in one mode of operation the available state of charge is less than the state of charge.

4. The uninterruptible power supply of claim 1, wherein the battery temperature time parameter includes a time duration until a temperature of the battery exceeds a maximum authorized temperature threshold, and the state of charge time parameter includes a time duration until the state of charge of the battery is depleted.

5. The uninterruptible power supply of claim 4, wherein the controller is further configured to compare the battery temperature time parameter and the state of charge time parameter and determine a lesser of the battery temperature time parameter and the state of charge time parameter.

6. The uninterruptible power supply of claim 5, wherein the controller is configured to determine the output power provided by the output and generate the state of charge time parameter based on the state of charge of the battery and the determined output power.

7. The uninterruptible power supply of claim 6, wherein the controller is configured to determine a temperature of the battery, determine battery thermal parameters, and generate the temperature time parameter based on the determined output power, determined temperature, and battery thermal parameters.

8. The uninterruptible power supply of claim 1, wherein the battery includes a lithium ion battery.

9. A method of monitoring a battery in an uninterruptible power supply having an input coupled to a power source, an output coupled to at least one load, the method comprising:

generating a battery temperature time parameter;

generating a state of charge time parameter;

comparing the battery temperature time parameter and the state of charge time parameter to determine a lesser of the battery temperature time parameter and the state of charge time parameter; and

generating an expected runtime for the battery based on the lesser of the battery temperature time parameter and the state of charge time parameter.

10. The method of claim 9, further comprising generating an available state of charge based on at least the expected runtime and the state of charge time parameter.

11. The method of claim 10, wherein the battery has a state of charge and in one mode of operation the available state of charge is less than the state of charge.

12. The method of claim 9, wherein the battery temperature time parameter includes a time duration until a temperature of the battery exceeds a maximum authorized temperature threshold, and the state of charge time parameter includes a time duration until the state of charge of the battery is depleted.

13. The method of claim 9, further comprising determining output power provided by the output, wherein generating the battery temperature time parameter includes generating the battery temperature time parameter based on the state of charge of the battery and the determined output power.

14. The method of claim 13, further comprising:

determining a temperature of the battery; and

determining battery thermal parameters,

wherein generating the state of charge time parameter includes generating the state of charge time parameter based on the determined output power, determined temperature, and battery thermal parameters.

15. An uninterruptible power supply comprising:

an input configured to receive input power;

at least one battery having a state of charge and configured to provide battery power;

an output configured to provide output power derived from at least one of the input power and the battery power; and

means for generating an expected runtime for the battery based on at least a battery temperature time parameter.

16. The uninterruptible power supply of claim 15, further comprising means for generating an available state of charge based on at least the expected runtime and a state of charge time parameter.

17. The uninterruptible power supply of claim 16, wherein in one mode of operation the available state of charge is less than the state of charge.

18. The uninterruptible power supply of claim 16, wherein the battery temperature time parameter includes a time duration until a temperature of the battery exceeds a maximum authorized temperature threshold, and the state of charge time parameter includes a time duration until the state of charge of the battery is depleted.

19. The uninterruptible power supply of claim 18, further comprising means for comparing the battery temperature time parameter and the state of charge time parameter and determining the lesser of the battery temperature time parameter and the state of charge time parameter.

20. The uninterruptible power supply of claim 15, wherein the battery includes a lithium ion battery.