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Method and apparatus for connection and disconnection of batteries to uninterruptible power systems and the like

  • US 5,619,076 A
  • Filed: 12/19/1994
  • Issued: 04/08/1997
  • Est. Priority Date: 12/19/1994
  • Status: Expired due to Term
First Claim
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1. Electrical power connection apparatus comprising:

  • (a) a battery;

    (b) a DC bus line, a common line connected to the battery, and a capacitor connected between the DC bus line and the common line;

    (c) a main connector connected in a power conduction path from the battery to the DC bus line, the main connector operable to be closed to provide conduction therethrough and to be opened to interrupt conduction; and

    (d) an auxiliary switch and a precharge resistor connected between the battery and the DC bus line, the auxiliary switch including a mechanically actuated switch having two positions, a first position in which current flow is blocked from the battery through the precharge resistor to the DC bus line and a second position in which current is passed from the battery through the precharge resistor, and a link arm having a portion extending upwardly from the switch and positioned to engage an actuator button of the switch to switch the same from the first position to the second position as the link arm is depressed downwardly, the link arm having a tab portion extending upwardly to be contacted by a movable section of the main connector as the movable section is engaged by a user to a fixed section of the main connector, to complete a circuit path from the battery to the capacitor through the precharge resistor as the main connector is being closed and for a period of time prior to electrical connection through the main connector from the battery to the capacitor, the resistance of the precharge resistor controlling the level of the peak charging current passing through the precharge resistor to the capacitor.

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