Electricity: measuring and testing – Electrolyte properties – Using a battery testing device
Reexamination Certificate
1999-11-01
2001-06-19
Wong, Peter S. (Department: 2838)
Electricity: measuring and testing
Electrolyte properties
Using a battery testing device
C320S103000, C320S134000
Reexamination Certificate
active
06249124
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to electronic battery testers. More specifically, it relates to electronic battery testers which contain an internal power source.
Electronic battery testers are known in the art. Various examples of such batteries are described in U.S. Pat. No. 3,873,911, issued Mar. 25, 1975, to Champlin, entitled ELECTRONIC BATTERY TESTING DEVICE; U.S. Pat. No. 3,909,708, issued Sep. 30, 1975, to Champlin, entitled ELECTRONIC BATTERY TESTING DEVICE; U.S. Pat. No. 4,816,768, issued Mar. 28, 1989, to Champlin, entitled ELECTRONIC BATTERY TESTING DEVICE; U.S. Pat. No. 4,825,170, issued Apr. 25, 1989, to Champlin, entitled ELECTRONIC BATTERY TESTING DEVICE WITH AUTOMATIC VOLTAGE SCALING; U.S. Pat. No. 4,881,038, issued Nov. 14, 1989, to Champlin, entitled ELECTRONIC BATTERY TESTING DEVICE WITH AUTOMATIC VOLTAGE SCALING TO DETERMINE DYNAMIC CONDUCTANCE; U.S. Pat. No. 4,912,416, issued Mar. 27, 1990, to Champlin, entitled ELECTRONIC BATTERY TESTING DEVICE WITH STATE-OF-CHARGE COMPENSATION; U.S. Pat. No. 5,140,269, issued Aug. 18, 1992, to Champlin, entitled ELECTRONIC TESTER FOR ASSESSING BATTERY/CELL CAPACITY; U.S. Pat. No. 5,343,380, issued Aug. 30, 1994, entitled METHOD AND APPARATUS FOR SUPPRESSING TIME VARYING SIGNALS IN BATTERIES UNDERGOING CHARGING OR DISCHARGING; U.S. Pat. No. 5,572,136, issued Nov. 5, 1996, entitled ELECTRONIC BATTERY TESTER WITH AUTOMATIC COMPENSATION FOR LOW STATE-OF-CHARGE; U.S. Pat. No. 5,574,355, issued Nov. 12, 1996, entitled METHOD AND APPARATUS FOR DETECTION AND CONTROL OF THERMAL RUNAWAY IN A BATTERY UNDER CHARGE; U.S. Pat. No. 5,585,728, issued Dec. 17, 1996, entitled ELECTRONIC BATTERY TESTER WITH AUTOMATIC COMPENSATION FOR LOW STATE-OF-CHARGE; U.S. Pat. No. 5,592,093, issued Jan. 7, 1997, entitled ELECTRONIC BATTERY TESTING DEVICE LOOSE TERMINAL CONNECTION DETECTION VIA A COMPARISON CIRCUIT; U.S. Pat. No. 5,598,098, issued Jan. 28, 1997, entitled ELECTRONIC BATTERY TESTER WITH VERY HIGH NOISE IMMUNITY; U.S. Pat. No. 5,757,192, issued May 26, 1998, entitled METHOD AND APPARATUS FOR DETECTING A BAD CELL IN A STORAGE BATTERY; U.S. Pat. No. 5,821,756, issued Oct. 13, 1998, entitled ELECTRONIC BATTERY TESTER WITH TAILORED COMPENSATION FOR LOW STATE-OF-CHARGE; U.S. Pat. No. 5,831,435, issued Nov. 3, 1998, entitled BATTERY TESTER FOR JIS STANDARD; and U.S. Pat. No. 5,914,605, issued Jun. 22, 1999, entitled ELECTRONIC BATTERY TESTER.
Some battery testers are powered exclusively using power received from the battery under test. However, other battery testers require additional power, either for performing the battery test, when the battery under test is discharged and cannot operate the tester or for providing functionality when the battery tester is disconnected from the battery under test. One technique to provide such additional power is to use an internal battery to power the battery test circuitry. However, typically such battery testers have had limitations placed on their use due to the internal battery. For example, some testers have been required to be taken “off line” in order to charge the internal battery and cannot perform a battery test.
SUMMARY OF THE INVENTION
An electronic battery tester for testing a storage battery include storage battery test circuitry configured to receive power through a power input. An internal battery is configured to provide power to the power input of the storage battery test circuitry. A switch is provided to selectively couple the storage battery test circuitry to the internal battery such that the internal battery can be tested.
In another aspect, an electronic battery tester for testing a storage battery includes storage battery test circuitry configured to receive power through a power input. An internal battery is configured to provide power to the power input of the storage battery test circuitry. An AC power adaptor is configured to supply a charging current to the internal battery while the storage battery test circuitry is operational.
In another aspect, an electronic battery tester for testing a storage battery includes storage battery test circuitry configured to receive power through a power input. An internal battery is configured to provide power to the power input of the storage battery test circuitry. A power supply is configured to draw power from the storage battery and responsively generate a charging signal to charge the internal battery.
In another aspect, an electronic battery tester for testing a storage battery includes storage battery test circuitry configured to receive power through a power input. An internal battery is further configured to provide power to the power input of the storage battery test circuitry. The internal battery is configured to provide power to an automotive vehicle which contains the storage battery when the storage battery is disconnected from the automotive vehicle for replacement of the storage battery.
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Midtronics Inc.
Toatley Jr. Gregory J
Westman Champlin & Kelly P.A.
Wong Peter S.
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