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Electrical apparatus connected with a battery charger system

  • US 4,639,656 A
  • Filed: 05/02/1985
  • Issued: 01/27/1987
  • Est. Priority Date: 05/04/1984
  • Status: Expired due to Fees
First Claim
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1. An electrical apparatus connected with a battery charger system comprising;

  • a rechargeable battery,a charge current source for supplying charge current to said battery and electrically connected to said battery, means for controlling said charge current supplied to said battery, said charge current controlling means changing large current for fast charging into small current for normal charging of said battery by said charge current supplied thereto, said charge current controlling means being interconnected between said battery and said charge current source and disposed therebetween,electrical load means supplied with load current from said battery and electrically connected to said battery,switching means interconnected between said battery and said load means for switching between a conduction and a non-conduction state for controlling the supply of said load current to said load means from said battery,switch-operating means interconnected between said battery and said switching means for operating said switching means to switch between said conduction state and said non-conduction state, andfast-charging-period controlling means electrically connected to said charge current source, said switching means and said charge current controlling means for controlling the supply of said large current for fast charging by said charge current controlling means,said fast-charging-period controlling means comprising a capacitor capable of being charged to a potential indicative of the time required to charge said battery to a value sufficient to operate said load means for a fixed period of time and discharged across a resistor and said switching means, said charge current controlling means enabling rapid flow of said large current used for fast charging to said battery during the interval when the charge voltage of said capacitor is raised to said indicative potential and thereafter enabling said small current for said normal charging to flow through said charge current controlling means;

    whereby said battery for operating said load means can be rapidly charged to a value sufficient to permit the operation thereof for said period while enabling normal charging of said battery thereafter.

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