Solar battery system for low temperature operation
First Claim
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1. A solar energy system, comprising:
- a battery pack comprising at least one battery;
a heater located in such a way as to provide heat to the battery pack;
a temperature sensor located in such a way as to measure the temperature of the battery pack;
at least one solar panel;
an output circuit for delivering electric power;
a controller comprising a processor and memory, said controller configured to perform the following functions;
receive temperature data from the temperature sensor;
receive voltage data from the at least one battery and determine whether or not the at least one battery is fully charged;
determine whether the at least one solar panel is producing power;
if the at least one solar panel is producing power, the at least one battery is not fully charged, and the thermometer is indicating a temperature within a range that is favorable for battery charging, charging the battery pack using the power produced by the solar panel;
if the solar panel is producing power and the thermometer is indicating a temperature that is too low for battery charging, turning on the heater and heating the battery until the thermometer indicates a temperature within a range that is favorable for battery charging.
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Abstract
A power delivery device is disclosed, comprising at least one solar panel, a battery pack comprising at least one battery, and a heater, wherein the device is configured to measure the temperature of the battery pack and power the heater to heat the battery pack if it is too cold for optimal charging.
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Citations
13 Claims
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1. A solar energy system, comprising:
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a battery pack comprising at least one battery; a heater located in such a way as to provide heat to the battery pack; a temperature sensor located in such a way as to measure the temperature of the battery pack; at least one solar panel; an output circuit for delivering electric power; a controller comprising a processor and memory, said controller configured to perform the following functions; receive temperature data from the temperature sensor; receive voltage data from the at least one battery and determine whether or not the at least one battery is fully charged; determine whether the at least one solar panel is producing power; if the at least one solar panel is producing power, the at least one battery is not fully charged, and the thermometer is indicating a temperature within a range that is favorable for battery charging, charging the battery pack using the power produced by the solar panel; if the solar panel is producing power and the thermometer is indicating a temperature that is too low for battery charging, turning on the heater and heating the battery until the thermometer indicates a temperature within a range that is favorable for battery charging. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of delivering solar energy, comprising:
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using a solar panel to generate solar energy; determining whether or not a battery pack requires charging; determining the temperature of the battery pack; if the battery pack requires charging and the temperature of the battery pack is too low for optimal charging, using the solar energy to power a heater to heat the battery pack; if the battery pack requires charging and the temperature of the battery pack is adequate for optimal charging, using the solar energy to charge the battery pack; if the battery pack is charging and the amount of solar power provided by the solar panel is greater than the amount of energy needed to charge the battery pack, providing an amount of power equal to the difference between the power provided by the solar panel and the power needed to charge the battery pack to an output circuit; if the battery pack is fully charged and the solar panel is receiving power, providing the power provided by the solar panel to an output circuit; if the battery pack is fully or partially charged and the solar panel is not receiving power, using the battery pack to power an output circuit. - View Dependent Claims (10, 11, 12)
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13. A system for generating alternating current, comprising:
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at least one solar panel connected to a bus; a battery pack comprising at least one battery connected to the bus; at least one micro-inverter connected to the bus; a heater attached to the battery pack; a temperature sensor attached to the battery pack; a charging circuit connected to the battery pack; a controller connected to the at least one micro-inverter, the heater, the temperature sensor, and the charging circuit, wherein the controller is configured to perform the following actions; determining the temperature of the battery pack; if the temperature of the battery pack is below a predetermined temperature during charging, turning off the charging circuit, turning on the heater to heat the battery pack, and turning on the charging circuit after the predetermined temperature is reached; determining the voltage at the bus; if the voltage at the bus is below a predetermined setpoint voltage and the solar panel is receiving power, turning off the at least one micro-inverter and charging the battery; if the voltage at the bus is at or above a predetermined maximum voltage and the solar panel is generating more power than the maximum power of the micro-inverter, said predetermined maximum voltage higher than the predetermined setpoint voltage, turning off the battery charging circuit and turning on the at least one micro-inverter to maximum power; if the voltage at the bus is at or above the predetermined setpoint voltage and the battery is not fully charged, turning on the at least one micro-inverter and keeping the charging circuit turned on, using the solar panel to charge the battery; if the voltage at the bus is at or above the predetermined setpoint voltage and the battery is fully charged, turning on the at least one micro-inverter and turning off the charging circuit.
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Specification