Charging voltage distribution apparatus for series batteries
First Claim
1. A charging voltage distribution apparatus for series batteries, comprising:
- charging voltage distribution sections each of which is adapted to be connected in parallel with an associated one of the series batteries, said each charging voltage distribution section including a bypass circuit and a control circuit;
said bypass circuit of said each charging voltage distribution section being connected in parallel with the associated battery; and
said control circuit of said each charging voltage distribution section being operable to continuously variably control an amount of current flowing through the associated bypass circuit according to a charging voltage applied to the associated battery.
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Accused Products
Abstract
A charging voltage distribution apparatus dedicated to a charging apparatus for charging batteries connected in series comprises bypass circuits 15A and 15B connected in parallel with each of batteries B1, B2, etc. and a control circuit (consisting of circuit elements 4, 5, 6, 7, 8, 9, 11, 12, 13, and switches) for controlling amount of current to be routed into the bypass circuits 15A and 15B according to the voltage of a battery connected to the bypass circuits 15A and 15B. When the voltage of the battery exceeds a predetermined value, the control circuit makes the current to be routed into the bypass circuits 15A and 15B. When the batteries B1, B2, etc. connected in series have voltages exceeding the predetermined value, current is routed into the bypass circuits 15A and 15B. When the batteries have voltages lower than the predetermined value, charging current is fed for charging. Switching of current from the battery to the bypass circuits 15A and 15B or vice versa by means of the control circuit is achieved by making or breaking the switching devices SW1 and SW2 in the bypass circuits according to the voltage of the battery. The amount of current to be routed to the bypass circuits is determined by controlling the making and breaking durations of the switching devices.
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Citations
22 Claims
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1. A charging voltage distribution apparatus for series batteries, comprising:
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charging voltage distribution sections each of which is adapted to be connected in parallel with an associated one of the series batteries, said each charging voltage distribution section including a bypass circuit and a control circuit; said bypass circuit of said each charging voltage distribution section being connected in parallel with the associated battery; and said control circuit of said each charging voltage distribution section being operable to continuously variably control an amount of current flowing through the associated bypass circuit according to a charging voltage applied to the associated battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A charging voltage distribution device for series batteries, which device is adapted to be connected in parallel with a battery of the series batteries, comprising:
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a bypass circuit connected in parallel with the battery and including a switching device; and a control circuit for continuously variably controlling an amount of current flowing through said bypass circuit according to a charging voltage applied to the battery; wherein said control circuit includes a first reference voltage generator for generating a first reference voltage, a first voltage detecting circuit for detecting a first voltage corresponding to the charging voltage applied to the battery, and a control signal output circuit for determining a first voltage difference between said detected first voltage and said first reference voltage and for outputting a control signal which varies according to said first voltage difference, said switching device being turned on when supplied with said control signal; and wherein said control signal output circuit supplying the switching device with the control signal in the form of a series of pulses at those intervals of time which vary according to said first voltage difference, thereby changing that on-off duty ratio of the switching device which determines a turn-on duration of the switching device. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A charging voltage distribution apparatus for series batteries, comprising:
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bypass circuits including switching devices; and a control circuit for controlling an amount of current to be routed into said bypass circuits according to the voltage of a battery connected to said bypass circuits; said control circuit including; reference voltage generators for generating reference voltages; voltage detecting circuits for detecting voltages corresponding to battery voltage; a control signal output circuit for calculating a voltage difference among said detected voltages and reference voltages and outputting control signals according to said voltage difference; and circuits for actuating said switching devices in said bypass circuits according to said control signals; wherein when a voltage difference between voltages provided by a pair of said reference voltage generator and voltage detecting circuit becomes zero, said switching devices close said bypass circuits to cause said duty ratio of the on- and off-state durations of said switching devices to increase, while when a voltage difference between voltages provided by the other pair of said reference voltage generator and voltage detecting circuit becomes zero, said switching devices prevent said duty ratio from increasing.
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Specification