Automatic battery analyzer including apparatus for determining presence of single bad cell
First Claim
Patent Images
1. Apparatus for determining the acceptability of a storage battery under test and comprising:
- first circuit means for coupling to the battery under test and performing a load test on said battery;
second circuit means for coupling to the battery under test and performing a voltage bounce back test on said battery;
third circuit means for coupling to the battery under test, placing a load on said battery, and testing whether the rate of change of the battery voltage exceeds a predetermined value; and
fourth circuit means coupled to said first, second, and third circuit means for controlling the sequence in which the tests of said first, second, and third circuit means are performed and providing a readout responsive to outputs of said first, second, and third circuit means.
2 Assignments
0 Petitions
Accused Products
Abstract
There are described apparatus for detecting the presence of a defective cell in a lead-acid storage battery. The apparatus is included as a part of a larger apparatus for analyzing the condition of the battery and its suitability for further use in automobile lighting, starting, and ignition applications. The apparatus measures the terminal potential of the battery when it is subject to a constant resistance load. If that potential is found to increase more than a predetermined amount during a time interval following the application of the load, the battery is known to have at least one defective cell.
291 Citations
50 Claims
-
1. Apparatus for determining the acceptability of a storage battery under test and comprising:
-
first circuit means for coupling to the battery under test and performing a load test on said battery; second circuit means for coupling to the battery under test and performing a voltage bounce back test on said battery; third circuit means for coupling to the battery under test, placing a load on said battery, and testing whether the rate of change of the battery voltage exceeds a predetermined value; and fourth circuit means coupled to said first, second, and third circuit means for controlling the sequence in which the tests of said first, second, and third circuit means are performed and providing a readout responsive to outputs of said first, second, and third circuit means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. The method of determining the acceptability of an electrical storage battery comprising:
-
the first step of performing an electrical load test on said battery; the second step of performing a voltage bounce back test on said battery; the third step of performing a test responsive to the rate of change of the battery voltage while the battery is under a load; and the fourth step of determining from the results of said first, second, and third steps the acceptability of said battery.
-
-
21. The method of determining the acceptability of an electrical storage battery comprising:
-
the first step of placing a load on said battery, determining whether the battery terminal voltage is above a first predetermined level after a first predetermined period of time, and removing said load from said battery; the second step of determining whether the battery terminal voltage is above a second predetermined level after a second predetermined period of time following the removal of said load from said battery; the third step of determining whether the rate of change of the battery voltage while the battery is under load is above a third predetermined value; and the fourth step of determining from the results of said first, second, and third steps whether said battery is acceptable. - View Dependent Claims (22, 23, 24, 25)
-
-
26. Apparatus for determining the acceptability of a storage battery under test and comprising:
-
first circuit means for coupling to the battery under test and performing a load test on said battery; second circuit means for coupling to the battery under test and performing a voltage bounce back test on said battery; third circuit means for coupling to the battery under test, placing a load on said battery, and testing whether the battery voltage increase is greater than a predetermined amount during a time period; and fourth circuit means coupled to said first, second, and third circuit means for controlling the sequence in which the tests of said first, second, and third circuit means are performed and providing a readout responsive to outputs of said first, second, and third circuit means. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
-
-
45. The method of determining the acceptability of an electrical storage battery comprising:
-
the first step of performing an electrical load test on said battery; the second step of performing a voltage bounce back test on said battery; the third step of performing a test responsive to whether the battery voltage increases greater than a predetermined amount during a time period while the battery is under a load; and the fourth step of determining from the results of said first, second, and third steps the acceptability of said battery.
-
-
46. The method of determining the acceptability of an electrical storage battery comprising:
-
the first step of placing a load on said battery, determining whether the battery terminal voltage is above a first predetermined level after a first predetermined period of time, and removing said load from said battery; the second step of determining whether the battery terminal voltage is above a second predetermined level after a second predetermined period of time following the removal of said load from said battery; the third step of determining whether the rate of change of the battery voltage increases greater than a predetermined amount during a time period while the battery is under load; and the fourth step of determining from the results of said first, second, and third steps whether said battery is acceptable. - View Dependent Claims (47, 48, 49, 50)
-
Specification