Electronic battery testing in circuit

• US 20080164762A1
• Filed: 01/09/2007
• Published: 07/10/2008
• Est. Priority Date: 01/09/2007
• Status: Active Grant

• Current Assignee: Myers Emergency Power Systems, LLC
• Original Assignee: Myers Power Products Inc.
• Inventors: Pecile, Conrad Angelo
• Granted Patent: US 7,635,983 B2
• Time in Patent Office: Days
• US Class Current: 307/66
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]

Abstract

A battery testing apparatus including battery charger/tester and a controller having battery charge mode and a battery test mode. In the battery charge mode, the controller causes a utility power source to be connected to the battery charger/tester, and the battery charger/tester allows electrical current to flow from the utility power source to the battery. In the battery test mode, the battery charger/tester allows current to flow to the utility power source so as to provide a consistently repeatable power draw from the battery reducing the error in detection of a weakened battery.

Claims

1. A battery testing apparatus for use with a battery and a utility power source, said battery testing device comprising:

a battery charger/tester, to be connected to the battery, operable to selectively allow either;

electrical current to flow to the battery through said battery charger/tester;

or electrical current to flow from the battery through said battery charger/tester;

a switch, connected to said battery charger/tester and to be connected to the utility power source, wherein when the switch is closed the utility power source and the battery charger/tester are electrically connected and when the switch is open the utility power source and the battery charger/tester are electrically disconnected;

a controller electrically connected to said battery charger/tester and said switch via control lines, and to be electrically connected to the utility power source, and the battery via sense lines, and having a battery charge mode and a battery test mode, wherein;

in the battery charge mode, said controller is operable to control said switch such that said switch is closed to electrically connect the utility power source to the battery charger/tester, and control said battery charger/tester to allow electrical current to flow from the utility power source to the battery; and

in the battery test mode, said controller is operable to control said switch such that said switch is closed to electrically connect the utility power source to the battery charger/tester, control said battery charger/tester to allow current to flow from the battery to the utility power source via said switch, and to collect test data from the current flowing from the battery.

2. The apparatus of claim 1, wherein said controller is operable to change the mode of operation based on status signals on the sense lines from the utility source and the battery.

3. The apparatus of claim 1, wherein the battery comprises a battery bank.

4. The apparatus of claim 1, wherein:

said controller is operable to monitor conditions via the sense lines; and

the conditions include;

whether the voltage being supplied from the utility power source is within a preset tolerance,

whether the frequency of the electrical power being supplied from the utility power source is within a preset tolerance,

whether said controller is able to phase lock to the utility source, and

whether the power supplied from the utility power source has remained stable for a specified length of time.

5. The apparatus of claim 1, for use with a DC load, said apparatus further comprising:

a load node connected to said battery charger/tester, wherein the battery charger/tester is to be connected to the battery via said load node, and said load node is to be connected to the DC load;

said controller further including a battery backup mode, wherein in the battery backup mode, said controller is operable to control said switch such that said switch is open to electrically disconnect the utility power source from the battery charger/tester, and control said battery charger/tester to stop current from flowing through said battery charger/tester and allow electrical current to flow from the battery to the load node to provide battery backup to the load from the battery via said load node.

6. The apparatus of claim 5, wherein said controller is operable control said battery charger/tester and said switch to transition to any one of the battery testing, battery charging, and battery backup modes from any other of the battery testing, battery charging, and battery backup modes without interrupting power being supplied to the DC load.

7. The apparatus of claim 5, wherein said controller is operable to change the mode of operation based on status signals on the sense lines from the utility source and the battery.

8. The apparatus of claim 1, for use with an AC load, said apparatus further comprising:

an inverter, connected to said controller via an inverter control line and to be connected between the battery and the AC load, operable to invert DC current from the battery into AC current for the AC load;

said controller further including a battery backup mode, wherein in the battery backup mode, said controller is operable to control said switch such that said switch is open to electrically disconnect the utility power source from the battery charger/tester, and control said battery charger/tester to stop current from flowing through said battery charger/tester and to allow electrical current to flow from the battery to the inverter to provide battery backup to the load from the battery via said inverter.

9. The apparatus of claim 8, wherein said controller is operable control said battery charger/tester and said switch to transition to any one of the battery testing, battery charging, and battery backup modes from any other of the battery testing, battery charging, and battery backup modes without interrupting power being supplied to the AC load via said inverter.

10. The apparatus of claim 8, wherein said controller is operable to change the mode of operation based on status signals on the sense lines from the utility source and the battery.

11. A battery charging, battery testing, and battery backup apparatus for use with a battery, a utility power source, and a load, said apparatus comprising:

a switch, to be connected to the load at a load node and to the utility power source, wherein when the switch is closed the load and the utility power source are electrically connected and when the switch is open the load and the utility power source are electrically disconnected;

a power bridge, electrically connected to the switch at the load node, and to be electrically connected to the battery, operable to selectively allow electrical current to flow to the battery through said power bridge or allow electrical current to flow from the battery through said power bridge;

a controller electrically connected to said power bridge and said switch via control lines, and to be electrically connected to the utility power source, the load, and the battery via sense lines, and having a battery charge mode, a battery test mode, and a battery backup mode, wherein;

in the battery charge mode, said controller is operable to control said switch such that said switch is closed to electrically connect the utility power source to the load node, and control said power bridge to allow electrical current to flow from the load node to the battery;

in the battery test mode, said controller is operable to control said switch such that said switch is closed to electrically connect the utility power source to the load node, control said power bridge to allow current to flow from the battery to the load node and to the utility power source via said switch, and to collect test data from the current flowing from the battery; and

in the battery backup mode, said controller is operable to control said switch such that said switch is open to electrically disconnect the utility power source from the load node, and control said power bridge to allow electrical current to flow from the battery to the load node to provide battery backup to the load.

12. The apparatus of claim 11, wherein said controller is operable control said power bridge and said switch to transition to any one of the battery testing, battery charging, and battery backup modes from any other of the battery testing, battery charging, and battery backup modes without interrupting power being supplied to the load.

13. The apparatus of claim 11, wherein said controller is operable to change the mode of operation based on status signals on the sense lines from the utility source and the battery.

14. The apparatus of claim 11, wherein the battery comprises a battery bank.

15. The apparatus of claim 11, wherein:

said controller is operable to monitor conditions via the sense lines; and

the conditions include;

whether the voltage being supplied from the utility power source is within a preset tolerance,

whether the frequency of the electrical power being supplied from the utility power source is within a preset tolerance,

whether said controller is able to phase lock to the utility source, and

whether the power supplied from the utility power source has remained stable for a specified length of time.