Battery testing apparatus with overload protective means

  • US 4,297,639 A
  • Filed: 07/18/1979
  • Issued: 10/27/1981
  • Est. Priority Date: 12/13/1978
  • Status: Expired due to Term
  • ×
    • Pin
First Claim
Patent Images

1. A battery testing apparatus for evaluating the charge capacity of a storage battery under no-load and load conditions while limiting the duration of the test and protecting both the testing apparatus and battery from excessive and potentially harmful current being drawn from the battery during the test, and comprisingcable means adapted to be connected to the electrodes of the storage battery,voltage indicator means electrically connected to said cable means and operable for detecting the voltage available between the electrodes of the battery,a load circuit including a load resistor connected in parallel with said voltage indicator means and switch means connected in series with said load resistor and positionable between open and closed states so that the relative magnitude of the voltage of the battery under a no-load condition can be determined when said switch means is open and the relative magnitude of the voltage of the battery under a load condition can be determined when said switch means is closed,and said switch means comprising current responsive means which will open in response to the passage of current of a magnitude exceeding a predetermined amperage rating, the predetermined amperage rating of said current responsive means being correlated to the resistance of said load resistor and to a predetermined acceptable level of battery capability such that a battery undergoing testing and having a capability at or above said predetermined acceptable level will result in a current in the load circuit exceeding said predetermined amperage rating of the current responsive means, thereby opening said load circuit and protecting the battery and the testing apparatus from excessive current.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×