Power source apparatus
First Claim
1. A power source apparatus comprising:
- a plurality of battery packs having a plurality of battery cells connected in parallel;
a plurality of battery units having the plurality of battery packs connected in series; and
a plurality of battery units connected in parallel with respect to each other;
first equalizing circuits that control remaining charge capacity variation between each battery unit;
second equalizing circuits that control remaining charge capacity variation among battery packs that make up each battery unit;
parallel connecting switches between each battery unit and an output line; and
a switch control circuit that controls the parallel connecting switches and first equalizing switches,wherein each first equalizing circuit is made up of a first current limiting resistor connected in series with one of the first equalizing switches, and each first equalizing circuit is connected between each battery unit and the output line in parallel with each parallel connecting switch,wherein at the time of connection of battery units to a load,when a detected current from the battery units to the load is greater than a set value, the switch control circuit turns the parallel connecting switches OFF and turns the first equalizing circuits ON to limit surge current with the first current limiting resistors, andwhen the detected current is less than or equal to the set value, the switch control circuit turns the parallel connecting switches ON and turns the first equalizing circuits OFF.
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Accused Products
Abstract
A power source apparatus includes first equalizing circuits to control remaining charge capacity variation among a plurality of battery units, and second equalizing circuits to control remaining charge capacity variation among all the series-connected battery packs that make up each battery unit. A first equalizing circuit connects each battery unit with an output line OL through a first series circuit made up of a first limiting resistor and first equalizing switch. Remaining charge capacity variation is equalized among all the battery units by the first equalizing circuits, and remaining charge capacity variation between battery packs in each battery unit is controlled by the second equalizing circuits.
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Citations
14 Claims
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1. A power source apparatus comprising:
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a plurality of battery packs having a plurality of battery cells connected in parallel; a plurality of battery units having the plurality of battery packs connected in series; and a plurality of battery units connected in parallel with respect to each other; first equalizing circuits that control remaining charge capacity variation between each battery unit; second equalizing circuits that control remaining charge capacity variation among battery packs that make up each battery unit; parallel connecting switches between each battery unit and an output line; and a switch control circuit that controls the parallel connecting switches and first equalizing switches, wherein each first equalizing circuit is made up of a first current limiting resistor connected in series with one of the first equalizing switches, and each first equalizing circuit is connected between each battery unit and the output line in parallel with each parallel connecting switch, wherein at the time of connection of battery units to a load, when a detected current from the battery units to the load is greater than a set value, the switch control circuit turns the parallel connecting switches OFF and turns the first equalizing circuits ON to limit surge current with the first current limiting resistors, and when the detected current is less than or equal to the set value, the switch control circuit turns the parallel connecting switches ON and turns the first equalizing circuits OFF. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A power source apparatus with a plurality of battery cells connected in series and parallel having battery packs configured with a plurality of battery cells connected in parallel, battery units configured with a plurality of battery packs connected in series, and a plurality of battery units connected in parallel with respect to each other comprising:
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first equalizing circuits that control remaining charge capacity variation between each battery unit; parallel connecting switches between each battery unit and an output line; and a switch control circuit that controls the parallel connecting switches and first equalizing switches; wherein each first equalizing circuit is made up of a first current limiting resistor connected in series with one of the first equalizing switches, and each first equalizing circuit is connected between each battery unit and the output line in parallel with each parallel connecting switch, and wherein at the time of connection of battery units to a load, when a detected current from the battery units to the load is greater than a set value, the switch control circuit turns the parallel connecting switches OFF and turns the first equalizing circuits ON to limit surge current with the first current limiting resistors; and when the detected current is less than or equal to the set value, the switch control circuit turns the parallel connecting switches ON and turns the first equalizing circuits OFF. - View Dependent Claims (13)
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14. A power source apparatus comprising:
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a plurality of battery packs having a plurality of battery cells connected in parallel; a plurality of battery units having the plurality of battery packs connected in series; and a plurality of battery units connected in parallel with respect to each other; first equalizing circuits that control remaining charge capacity variation between each battery unit; and parallel connecting switches between the battery units and an output line; and a power source controller that controls the parallel connecting switches and first equalizing switches; wherein each first equalizing circuit is made up of a first current limiting resistor connected in series with one of the first equalizing switches, and each first equalizing circuit is connected between each battery unit and the output line in parallel with each parallel connecting switch, wherein the power source controller controls remaining charge capacity variation between battery units by turning ON and OFF the first equalizing switches and the parallel connecting switches that are connected to each battery unit whose output voltage exceeds a battery unit threshold voltage, respectively, and by turning OFF and ON the other first equalizing switches and the other parallel connecting switches, respectively.
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Specification