Power feeding system

Patent metadata

Field	Value
Publication number	US-11909249-B2
Application number	US-202117455382-A
Country	US
Kind code	B2
Filing date	Nov 17, 2021
Priority date	Nov 18, 2020
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

A power feeding system of the present disclosure includes a control unit. In a case where a magnitude of supply destination power is smaller than an upper limit value of the power supply capability of the power source, the control unit controls the charge/discharge control circuit so as to meet the supply destination power based on power output from the power source, and to charge the storage battery with power which is a difference obtained by subtracting the supply destination power from the upper limit value of the power supply capability of the power source. In a case where the magnitude of the supply destination power is more than or equal to the upper limit value of the power supply capability of the power source, the control unit controls the charge/discharge control circuit so as to meet the supply destination power by both the power source and the storage battery.

First claim

The invention claimed is:

1. A power feeding system comprising:
a storage battery configured to be rechargeable and dischargeable, and to output power at a storage battery output voltage;
a charge/discharge control circuit configured to control charging/discharging power to/from the storage battery;
a power source at least having a power supply capability, wherein the power source includes a hybrid vehicle to which fuel that is usable for power generation can be added;
a control unit configured to control an operation of the charge/discharge control circuit; and
a power conversion circuit configured to convert DC power supplied from the storage battery and the power source into AC power and output the AC power to a power supply destination, wherein
in a case where a magnitude of supply destination power which is consumption power at the power supply destination to be supplied with power by the power source is lower than an upper limit value of the power supply capability of the power source, the power supply destination being a house or a power grid line, the control unit controls the charge/discharge control circuit so as to meet the supply destination power of the house or the power grid line based on power output from the power source and to charge the storage battery with power which is a difference obtained by subtracting the supply destination power from the upper limit value of the power supply capability of the power source,
in a case where the magnitude of the supply destination power of the house or the power grid line is more than or equal to the upper limit value of the power supply capability of the power source, the control unit controls the charge/discharge control circuit so as to meet the supply destination power of the house or the power grid line by both the power source and the storage battery, and
in a case where the power source is disconnected from the power feeding system for replenishing the power source with fuel, the control unit controls the charge/discharge control circuitry so as to continue a maximum power supply to the power supply destination when the power source is disconnected from the power feeding system, and the control unit controls the charge/discharge control circuitry responsive to a forced charging instruction from a user so as to force charging of the storage battery prior to disconnecting the power source from the power feeding system for replenishing the power source with fuel.

2. The power feeding system according to claim 1 , wherein the control unit controls the charge/discharge control circuit so as to change the power supply capability of the power source to be allocated to charging of the storage battery based on a state of charge of the storage battery and the magnitude of the supply destination power.

3. The power feeding system according to claim 2 , wherein the control unit controls the charge/discharge control circuit so as to further change the power supply capability of the power source to be allocated to charging of the storage battery based on an environmental temperature at a place where the storage battery is installed.

4. The power feeding system according to claim 1 , wherein in a case where the forced charging instruction is provided from the user, the control unit controls the charge/discharge control circuit so as to perform charging until the storage battery reaches a full charge, and provides the user with a charging completion notification in response to completion of charging of the storage battery.

5. The power feeding system according to claim 1 , further comprising a solar panel configured to supply the supply destination power.

6. The power feeding system according to claim 1 , wherein
the power source is a secondary battery configured to give priority to power storage capacity performance over the storage battery, and
the control unit controls the charge/discharge control circuit so as to change a ratio between a magnitude of power to be taken out of the power source and a magnitude of power to be taken out of the storage battery in accordance with a varying speed of the supply destination power and states of the power source and the storage battery.

7. A power feeding system comprising:
a storage battery configured to be rechargeable and dischargeable, and to output power at a storage battery output voltage;
a charge/discharge control circuit configured to control charging/discharging power to/from the storage battery;
a power source at least having a power supply capability, wherein the power source includes a generator;
a power conversion circuit configured to convert DC power supplied from the storage battery and the power source into AC power and output the AC power to a power supply destination; and
a control unit configured to control an operation of the charge/discharge control circuit, wherein
in a case where a magnitude of supply destination power which is consumption power at the power supply destination to be supplied with power by the power source is lower than an upper limit value of the power supply capability of the power source, the power supply destination being a house or a power grid line, the control unit controls the charge/discharge control circuit so as to meet the supply destination power of the house or the power grid line based on power output from the power source and to charge the storage battery with power which is a difference obtained by subtracting the supply destination power from the upper limit value of the power supply capability of the power source,
in a case where the magnitude of the supply destination power of the house or the power grid line is more than or equal to the upper limit value of the power supply capability of the power source, the control unit controls the charge/discharge control circuit so as to meet the supply destination power of the house or the power grid line by both the power source and the storage battery, and
in a case where the power source is disconnected from the power feeding system for replenishing the power source with fuel, the control unit controls the charge/discharge control circuitry so as to continue a maximum power supply to the power supply destination when the power source is disconnected from the power feeding system, and the control unit controls the charge/discharge control circuitry responsive to a forced charging instruction from a user so as to force charging of the storage battery prior to disconnecting the power source from the power feeding system for replenishing the power source with fuel.

Assignees

• Primearth Ev Energy Co Ltd

Inventors

• KOBA Daisuke
• Torii Yuji
• Sakayanagi Yuji
• Matsukawa Yasushi

Classifications

• H02J7/663

  using battery or load disconnect circuits (H02J9/002 takes precedence) · CPC title

• H02J2101/24

  Photovoltaics · CPC title

• H02J7/14 Primary

  for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle · CPC title

• B60K16/00

  Arrangements in connection with power supply of propulsion units in vehicles from forces of nature, e.g. sun or wind (electric propulsion with power supply from forces of nature, e.g. sun or wind, B60L8/00; wind motors specially adapted for installation on vehicles F03D9/32) · CPC title

• B60L8/003

  Converting light into electric energy, e.g. by using photo-voltaic systems · CPC title