Secondary battery charging device, method of charging in secondary battery charging device, photovoltaic generator, method of power generation in photovoltaic generator, photovoltaic-charged secondary battery system, electronic device, and electrical vehicle
First Claim
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1. A battery charging device, comprising:
- a battery pack including a plurality of battery cells connected in series; and
a control unit configured to;
estimate an output voltage of a solar battery at which output electrical power of the solar battery becomes a maximum for a measured solar radiation intensity;
determine, for the estimated output voltage, a number of the plurality of battery cells in the series connection at which the output electrical power of the solar battery remains the maximum; and
change the number of the plurality of battery cells in the series connection based on the determination.
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Abstract
A battery charging device includes a battery pack including a plurality of battery cells connected in series, and a control unit. The control unit is configured to change a series connection of the battery cells in response to a variation in output voltage of a solar battery.
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Citations
19 Claims
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1. A battery charging device, comprising:
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a battery pack including a plurality of battery cells connected in series; and a control unit configured to; estimate an output voltage of a solar battery at which output electrical power of the solar battery becomes a maximum for a measured solar radiation intensity; determine, for the estimated output voltage, a number of the plurality of battery cells in the series connection at which the output electrical power of the solar battery remains the maximum; and change the number of the plurality of battery cells in the series connection based on the determination. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for charging a battery charging device, the method comprising:
in the battery charging device that includes a battery pack, the battery back including a plurality of battery cells connected in series; estimating an output voltage of a solar battery at which output electrical power of the solar battery becomes a maximum for a measured solar radiation intensity; determining, for the estimated output voltage, a number of the plurality of battery cells in the series connection at which the output electrical power of the solar battery remains the maximum; and changing the number of the plurality of battery cells in the series connection based on the determination. - View Dependent Claims (14, 15, 16, 17)
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18. A photovoltaic generator, comprising:
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a solar battery that includes a plurality of solar battery cells connected in series; and a control unit configured to; estimate an output voltage of the solar battery at which output electrical power of the solar battery becomes a maximum for a measured solar radiation; determine, for the estimated output voltage, a number of the plurality of solar battery cells in the series connection at which the output electrical power of the solar battery remains the maximum; and change the number of the plurality of solar battery cells in the series connection based on the determination.
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19. A method of generating power, the method comprising:
in a photovoltaic generator that includes a solar battery, the solar battery including a plurality of solar battery cells connected in series; estimating an output voltage of the solar battery at which output electrical power of the solar battery becomes a maximum for a measured solar radiation intensity; determining, for the estimated output voltage, a number of the plurality of solar battery cells in the series connection at which the output electrical power of the solar battery remains the maximum; and changing the number of the plurality of solar battery cells in the series connection based on the determination.
Specification