US 2018/0026474 A1Published application

Solar photovoltaic generation device

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsSayuri TAKAHASHI, Tatsuya MIYOSHI, Haruki MATSUOKA

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Abstract

In a case where it is determined that a generated electric power of a solar panel is less than a predetermined value, a control unit of a solar photovoltaic generation device is configured to disconnect a solar battery from first and second electric power conversion units, stop power supply to the first electric power conversion unit to execute power saving control, and store an open circuit voltage (reference voltage) of the solar panel after the execution of the power saving control. In a case where the open circuit voltage of the solar panel exceeds a reference voltage continuously for a predetermined time after the execution of the power saving control, the control unit is configured to connect the solar battery to the first and second electric power conversion units, and start power supply to the first electric power conversion unit to release the power saving control.

A solar photovoltaic generation device using a solar panel, the solar photovoltaic generation device comprising:

a first electric power conversion unit configured to receive generated electric power generated by the solar panel as input, convert the generated electric power to first electric power, and output the first electric power;
a solar battery connected to the first electric power conversion unit and configured to be chargeable with the first electric power output from the first electric power conversion unit;
a second electric power conversion unit connected to the first electric power conversion unit and the solar battery, and configured to receive at least one of the first electric power output from the first electric power conversion unit or second electric power output from the solar battery as input, convert the input electric power to third electric power, and output the third electric power;
and
a control unit configured to control the solar battery and the first electric power conversion unit based on a state of the solar panel,
wherein, in a case where it is determined that the generated electric power of the solar panel does not satisfy a predetermined value, the control unit is configured to disconnect the solar battery from the first electric power conversion unit and the second electric power conversion unit, stop power supply to the first electric power conversion unit to execute power saving control, and store, as a reference voltage, an open circuit voltage of the solar panel before a predetermined first time elapses from the execution of the power saving control, and in a case where it is determined that the open circuit voltage of the solar panel exceeds the reference voltage continuously for a predetermined second time after the power saving control is executed, the control unit is configured to connect the solar battery to the first electric power conversion unit and the second electric power conversion unit, and start power supply to the first electric power conversion unit to release the power saving control.

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Facts

Application

15/651,417Filed 17 Jul 2017

Priority

JP 2016-14136019 Jul 2016

Published

25 Jan 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

H02J 7/35
Parallel operation in networks using both storage and other DC sources, e.g. providing buffering: with light sensitive cells
H02J 7/94
Regulation of charging or discharging current or voltage: in response to battery current
H02J 7/96
Regulation of charging or discharging current or voltage: in response to battery voltage
H02S 40/38
Electrical components: energy storage means, e.g. batteries, structurally associated with PV modules

Abstract

Claims8