JP5632771B2 - AC current supply device controller and AC current supply method - Google Patents

Description

  The present invention relates to an alternating current supply device, a controller for the alternating current supply device, and an alternating current supply method, and in particular, in a mobile device equipped with a storage battery, the storage battery is supplied with power from an external AC power source and provides power. The present invention relates to an alternating current supply device for a mobile device including an alternating current power supply socket, a controller for the alternating current supply device, and an alternating current supply method.

  2. Description of the Related Art Conventionally, a technique for making it possible to use a general household electric appliance in a mobile device such as an automobile equipped with a storage battery is widely known.

  For example, Patent Document 1 discloses a vehicular socket in which a general household electric appliance can be used in a car. This vehicle socket is connected to a battery of an automobile, and is connected to a DC / DC converter power supply circuit having a transformer for boosting a voltage, and connected to the DC / DC converter power supply circuit. A socket for home appliances connected to the plug for home appliances and an outlet switch linked to mounting the plug for home appliances are provided. The DC / DC converter power supply circuit includes a converter drive circuit that is operated by the outlet switch.

  Patent Document 2 discloses an in-vehicle power supply device that provides an AC output and a DC output, and enables an appropriate power supply to each load even when an unknown AC load is connected. An apparatus is disclosed. This in-vehicle power supply device converts a DC voltage generated by a DC / DC converter that generates a predetermined voltage and a DC voltage generated by the DC / DC converter into an alternating current in order to provide a DC voltage to a device that is necessary for driving the automobile. A DC / AC converter is provided, and its AC output is provided from an outlet plug. In addition, a controller is provided that limits the AC output by the DC / AC converter when the total power of the DC output and the AC output exceeds the maximum power of the DC / DC converter.

  Patent Document 3 discloses an in-vehicle power supply device that secures the use of a commercial AC power source as much as possible while suppressing a decrease in the state of charge of the in-vehicle power source. In the technology before this, the operation of the DC / AC inverter is prohibited when the SOC of the in-vehicle power source is lowered to a predetermined state so that the charging state (SOC) of the in-vehicle power source does not deviate from the predetermined range. It was. However, in the technique disclosed in this document, based on the SOC of the high voltage battery mounted on the vehicle, the power that can be supplied from the high voltage battery to the accessory outlet via the inverter, that is, the electrical product connected to the accessory outlet. By calculating the allowable power consumption that can be consumed, the use of commercial AC power supply is ensured as much as possible.

  Further, in Patent Document 4, even when the output voltage of a DC power source such as an AC adapter or a car battery connected to the charging device body is out of an allowable voltage range in which the charging device body can operate normally, the charging device itself A charging device that can prevent a failure or damage to the DC power supply itself is disclosed.

  Further, Patent Document 5 discloses a power system control device that performs AC 100 V output using power from a secondary battery. In the technique disclosed in this document, the AC100V output from the AC100V inverter is limited by determining the charge / discharge state based on the charge / discharge current of the battery, the accumulated charge / discharge amount, and the like.

  In the above-described prior art, although there is a difference between storing in the storage battery or storing in the storage battery from the external AC power source by the operation of the internal combustion engine, a DC / DC converter power supply circuit having a DC voltage step-up transformer function, By providing a DC / AC converter for converting the voltage into an alternating current, a general household appliance can use the direct current voltage once stored in the storage battery.

  On the other hand, in recent years, the capacity of storage batteries for plug-in hybrid vehicles (PHEV) and electric vehicles (EV), which receive power from AC power sources in houses, etc. has increased, and will be stored in mobile device storage batteries in the future. It is thought that the opportunity to use electric power for general electric appliances will increase.

  However, in the prior art, the DC / DC converter power supply circuit with the function of the step-up transformer is limited to an electric appliance with a relatively small load. In addition, when using a DC / AC converter, in the case of PHEV and EV, AC / DC conversion is performed once when power is supplied from an AC power supply. Providing electric power increases the energy loss as a whole.

  In particular, in the prior art, regardless of whether the on-vehicle storage battery is being charged from the external AC power source or not, the AC voltage output from the AC power socket of the vehicle is the DC voltage stored in the storage battery. It is assumed that the data is supplied after being converted to AC. Therefore, when charging from the external AC power supply to the vehicle storage battery and the use of the vehicle AC power supply socket are performed at the same time, charging from the external AC power supply to the vehicle storage battery is further DC / AC converted and from the AC power supply socket. Supplying an AC voltage is accompanied by two power conversions, resulting in a large energy loss.

JP 2000-301991 A JP 2008-1316 A JP 2004-282837 A JP 2009-60683 A JP 2002-374604 A

The object of the present invention is to provide an excessive power load to the external AC power supply even when the charging from the external AC power supply to the storage battery and the use of the AC power supply socket overlap in a vehicle equipped with a storage battery and an AC power supply socket. prevent, minimize power loss is to provide a controller for ac current supply device, and an alternating current supply method.

In order to solve the above-described problem, an AC power socket that outputs an AC current converted by a DC-AC converter or an AC current from an external AC power source and an AC power connection terminal connected to the external AC power source are connected. Controls the first switch that conducts or shuts off, and controls the second switch that conducts or shuts off between the AC power supply connection terminal and the AC-DC converter that converts AC current from the AC power supply connection terminal into DC current. , A controller for controlling a third switch for conducting or blocking between a storage battery for storing a direct current converted by an AC-DC converter and an AC power supply socket , wherein the AC power supply A controller is provided that shuts off the second switch and conducts the first switch when the socket usage detector that detects whether or not the socket is used detects the use of the AC power supply socket .
According to this, when charging from the external AC power supply to the storage battery and the use of the AC power supply socket overlap, it is possible to provide a controller that prevents excessive power load on the external AC power supply and minimizes power loss. .

Furthermore, a warning may be issued when the socket usage detector detects the use of the AC power socket and when the second switch is in a conductive state .
According to this, when the charging from the external AC power supply to the storage battery and the use of the AC power supply socket overlap, the user can be alerted.

In addition, an AC power supply connection terminal usage detector that detects whether or not an AC power supply connection terminal is used detects the use of an AC power supply connection terminal, and a socket use detector that detects whether or not an AC power supply socket is used is an AC power supply. When the use of the socket is detected, the first switch is turned on, the second switch is turned off, the third switch is turned off, the AC power connection terminal use detector does not detect the use of the AC power connection terminal, and When the socket use detector detects the use of the AC power socket, the first switch is shut off, the second switch is shut off, the third switch is turned on, and the AC power connection terminal use detector is the AC power connection terminal. If the socket usage detector detects that the AC power socket is not used, the first switch is shut off, the second switch is turned on, and the third switch is turned off. It may be characterized.
According to this, when the charging from the external AC power supply to the storage battery is started while the AC power supply socket is being used, or when the storage battery is being charged from the external AC power supply, the AC power supply socket is started to be used. In this case, it is possible to provide a controller that prevents an excessive power load on the external AC power source and minimizes power loss.

According to another aspect, in order to solve the above problems, a power storage unit that stores a DC current obtained from an AC power supply through AC-DC conversion, and an AC current obtained from the power storage unit through DC-AC conversion. in alternating current supply method for supplying an AC current output means, an alternating current including a for outputting, when said power storage means is to use an alternating current output means when accumulated direct current from the AC power source, the An AC current supply method is provided in which the power storage means stops storing DC current from the AC power supply and supplies AC current from the AC power supply to the AC current output means.
According to this, even when the charging from the external AC power supply to the storage battery and the use of the AC power supply socket overlap, an excessive power load to the external AC power supply is prevented and the power loss is minimized. Can provide.

As described above, according to the present invention, in a vehicle or the like equipped with a storage battery and an AC power supply socket, even when charging from the external AC power supply to the storage battery and the use of the AC power supply socket overlap, it is excessive to the external AC power supply preventing a power load, to minimize power loss, it is possible to provide the controller of the ac current supply device, and an alternating current supply method.

1 is a block diagram of a first embodiment according to the present invention. The block diagram which shows the state at the time of the normal charge in the 1st Example which concerns on this invention. The block diagram which shows the state at the time of AC power socket use in the 1st Example which concerns on this invention. The block diagram which shows a state when the alternating current power supply connection terminal and alternating current power supply socket in 1st Example which concern on this invention are used simultaneously. The flowchart which shows the control method of the controller of 1st Example which concerns on this invention.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
(First Example)
FIG. 1 shows a block diagram of an alternating current supply device 1 in a first embodiment according to the present invention. This alternating current supply device 1 is provided in a vehicle 2. The vehicle 2 is typically an automobile, but is not limited to this. The alternating current supply device 1 is a general vehicle including a train, a moving device such as a ship, an aircraft, etc. It can be applied to any container that has a storage battery and can supply power from the storage battery to other electrical appliances, such as a container having a storage battery and a vending machine that has a storage battery in the event of a power failure.

The alternating current supply device 1 can receive power from the external alternating current power supply 3 provided in a house or the like through the alternating current power supply connection terminal 10. The external AC power source 3 is typically a 100V or 200V commercial power source connected to the power system.
When the AC power supply terminal 10 is connected to the external AC power supply 3, the AC current supply device 1 is ready to receive power. The AC current from the AC power supply connection terminal 10 reaches the AC-DC converter 20 via the second switch 70.

The AC-DC converter 20 converts an AC current from the external AC power source 3 into a DC current. The AC-DC converter 20 is generally composed of a transformer that changes an AC voltage and a rectifier that rectifies the AC voltage. However, the AC-DC converter 20 is not limited to this, and any AC-DC converter 20 may be used as long as it receives AC and outputs DC. The output direct current is, for example, 12V. In this figure, although AC and DC lines are simplified, they are actually composed of positive voltage lines, negative voltage lines, neutral lines, and the like.
The direct current converted by the AC-DC converter 20 is stored in the storage battery 30. The storage battery 30 is not particularly limited, and may be a lithium ion storage battery, a nickel hydride storage battery, a lead storage battery, a nickel cadmium storage battery, a sodium sulfur battery, or the like.

  Further, the alternating current supply device 1 includes a direct current to alternating current converter 40. The DC-AC converter 40 converts a DC current from the storage battery 30 into an AC current. The DC-AC converter 40 is a so-called inverter device, and generally includes a rectifier and an inverter. However, the DC-AC converter 40 is not particularly limited as long as it is supplied with a direct current and outputs an alternating current.

  The alternating current supply device 1 includes an alternating current power supply socket 50. The AC power supply socket 50 may be of the same type as an outlet connecting a general household electric appliance. There are two sources of AC current output from the AC power supply socket 50, one is the AC current converted by the DC-AC converter 40 from the power stored in the storage battery 30, and the other is the external AC. AC current from the power source 3. These two alternating currents are switched and supplied from the alternating current power supply socket 50 by a method described later.

  Moreover, the alternating current supply device 1 is interposed between the alternating current power supply socket 50 and the alternating current power supply connection terminal 10, the first switch 60 that conducts or cuts off both, the alternating current power supply connection terminal 10, and the alternating current to direct current converter 20. And a third switch 80 interposed between the storage battery 30 and the AC power supply socket 50 and conducting or interrupting both. The first switch 60 and the second switch 70 may be an integrated changeover switch. In this case, both the first switch 60 and the first switch 70 are blocked in the initial state. When the first switch 60 is turned on, the second switch 70 is cut off. Conversely, when the second switch 70 is turned on, the first switch 60 is cut off.

  The position of the second switch 70 is between the AC power supply connection terminal 10 and the AC-DC converter 20 because the power of the external power source is not consumed when the second switch 70 is cut off. However, the AC-DC converter 20 and the storage battery 30 are used as necessary. It may be between. The position of the third switch 80 is between the storage battery 30 and the AC power supply socket 50. With such a positional relationship, when the third switch is shut off, the power of the storage battery 30 is not consumed. In addition, a third switch 80 can be provided between the DC-AC converter 40 and the AC power supply socket 50.

  The alternating current supply device 1 includes a controller 90. The controller 90 controls conduction / cutoff of the first switch 60, the second switch 70, and the third switch 80. The control method will be described later. As information for controlling these switches, the controller 90 includes the information from the socket use detector 130, the information from the AC power supply terminal use detector 140, and the state of charge of the storage battery 30 (SOC: State) described below. of Charge) information. The controller 90 may assemble predetermined logic using an electric circuit (hardware), or may assemble predetermined logic with software (firmware) loaded in a ROM or RAM.

  The alternating current supply device 1 includes a socket use detector 130 that detects whether or not the alternating current power supply socket 50 is used. The socket use detector 130 detects whether or not a plug of an electric appliance is inserted into the AC power socket 50, or detects whether or not a current flows from the AC power socket 50 to the electric appliance. Any detection method may be used. When the socket usage detector 130 detects the usage state, it transmits the usage state to the controller 90.

  Further, the AC current supply device 1 includes an AC power connection terminal use detector 140 that detects whether the AC power connection terminal 10 is used. The AC power supply terminal use detector 140 detects whether or not the AC power supply terminal 10 is inserted in the external AC power supply 3, that is, whether or not the power supply from the external AC power supply 3 can be received. To do. Similarly to the socket use detector 130, the AC power connection terminal use detector 140 may be either a physical detection method or an electrical detection method. When the AC power supply connection terminal usage detector 140 detects such a usage state, it transmits the usage state to the controller 90.

Moreover, the alternating current supply device 1 includes a charge state detector 150 that detects a state of charge (SOC) of the storage battery 30 in order to prevent overdischarge and overcharge of the storage battery 30. When the charge state detector 150 detects such a use state, it transmits the use state to the controller 90. The state of charge detector 150 detects the state of charge based on the result of integrating the current output from the storage battery 30, for example.
Moreover, the alternating current supply apparatus 1 may be equipped with the earth leakage breaker 120 in preparation for earth leakage.

  Moreover, the alternating current supply device 1 includes a warning display unit 100 that displays a warning or the like to the user, and an operation unit 110 that receives an operation from the user. The warning display unit 100 displays a warning or the like in accordance with a warning command from the controller 90. For example, the operation unit 110 receives an instruction to be performed on the warning display by a user who has viewed the warning display. The warning display unit 100 may display with a lamp such as an LED or may include a liquid crystal display device to display a message. The operation unit 110 may be operated by a button or the like, or may be a touch panel integrated with a liquid crystal display device.

  Control performed by the controller 90 for the first switch 60, the second switch 70, and the third switch 80 will be described with reference to FIGS. FIG. 2 shows a switch conduction / cut-off state during normal charging in which the AC current supply device 1 receives an AC current from the external AC power supply 3 and charges the storage battery 30. When the AC power connection terminal use detector 140 detects that the AC power connection terminal 10 is inserted into the external AC power source 3 and the AC current supply device 1 is in a state where it can receive power from the external AC power source 3. The state is transmitted to the controller 90. The controller 90 having received the transmission causes the second switch to conduct, and as a result, the alternating current flows to the alternating current-direct current converter 20 as indicated by an arrow, where it is converted into direct current and charged to the storage battery 30. . Other switches are shut off.

  FIG. 3 shows a switch conduction / cut-off state when the AC power supply device 1 uses the AC power supply socket 50 when the AC power supply connection terminal 10 is not inserted into the external AC power supply 3. When the socket usage detector 130 detects that a plug such as a household electric appliance has been inserted, the socket usage detector 130 transmits the state to the controller 90. The controller 90 having received the transmission causes the third switch to conduct, and as a result, the direct current flows from the storage battery 30 to the direct current to alternating current converter 40 as indicated by the arrow, where it is converted into alternating current, and the alternating current power socket. 50 is supplied with an alternating current. Other switches are shut off.

  FIG. 4 shows the conduction / cut-off state of the switch when the AC power connection terminal 10 and the AC power socket 50 are used simultaneously. Such a state occurs when the socket use detector 130 detects that a plug such as an electric appliance has been inserted into the AC power supply socket 50 in the normal charging state shown in FIG. This is a case where the AC power supply terminal use detector 140 detects that the AC power supply connection terminal 10 has been inserted into the external AC power supply 3 when a plug such as an electric appliance is inserted in the AC power supply socket 50 shown. .

In the former case, the controller 90 shuts off the second switch 70 when the socket use detector 130 detects that a plug has been inserted into the AC power socket 50 when the second switch 70 is in a conductive state. The first switch 60 is turned on. In the latter case, when the third switch 80 is in a conductive state, the controller 90 detects that the AC power supply terminal use detector 140 detects that the AC power supply terminal 10 has been inserted into the external AC power supply 3. The third switch 80 is cut off and the first switch 60 is turned on.
In addition, the user may be able to select on the operation screen the conditions for conducting and blocking the first switch 60, the second switch 70, and the third switch 80.

  In both the former and latter cases, the controller 90 issues a warning command to the warning display unit 100 in order to urge the user to alert the user before turning on / off the respective switches after detection of insertion. It may be emitted.

  When the AC power supply terminal use detector 140 detects the use of the AC power supply connection terminal 10 and the socket use detector 130 detects the use of the AC power supply socket 50, the controller 90 controls the first switch 60. , The second switch 70 is shut off, and the third switch 80 is shut off.

  When the AC power supply terminal usage detector 140 does not detect the use of the AC power supply connection terminal 10 and the socket usage detector 130 detects the use of the AC power supply socket 50, the first switch 60 is cut off. Then, the second switch 70 is cut off and the third switch 80 is turned on.

  When the AC power connection terminal use detector 140 detects the use of the AC power connection terminal 10 and the socket use detector 130 does not detect the use of the AC power socket 50, the first switch 60 is cut off. The second switch 70 is turned on and the third switch 80 is shut off.

  When the AC power supply terminal usage detector 140 does not detect the use of the AC power supply connection terminal 10 and the socket usage detector 130 does not detect the use of the AC power supply socket 50, the first switch 60 is cut off. Then, the second switch 70 is shut off and the third switch 80 is shut off.

  In addition, the controller 90 appropriately cuts off the third switch 80 in order to prevent overdischarge when using the AC power supply socket 50 according to the information from the charge state detector 150, and the AC power supply connection terminal 10 is externally connected. The second switch 70 is shut off to prevent overcharging when the AC power supply 3 is inserted.

With reference to FIG. 5, the control method of the controller in a present Example is demonstrated. The step is abbreviated as S.
In S10, controller 90 checks whether AC power supply connection terminal 10 is connected to external AC power supply 3 or not. If connected, the controller 90 checks whether a plug is inserted in the AC power supply socket 50 at S20. When the plug is not inserted, in S30, the controller 90 conducts the second switch 70 and shuts off the other switches. As a result, charging from the external AC power supply 3 to the storage battery 30 is started.

  In S40, controller 90 monitors the state of charge and checks the end of charge. S10, S20, and S30 are repeated until charging is completed, and when charging is detected, the controller 90 turns off the second switch 70 in S50.

  When the plug is inserted in S20, the controller 90 outputs a warning in S60. In S70, it waits for a user's instruction, and when the user's instruction is an instruction to give priority to charging the storage battery 30, in S30, the controller 90 conducts the second switch 70 and turns on the other switch. Cut off. If the user's instruction is an instruction to prioritize the use of the electric appliance via the AC power supply socket 50, the controller 90 conducts the first switch 60 and shuts off the other switches at S80. Thereafter, the process returns to S20.

  If the AC power supply connection terminal 10 is not connected to the external AC power supply 3 at S10, the controller 90 checks the remaining battery capacity of the storage battery 30 at S90. If the remaining amount is sufficient, the controller 90 checks whether a plug is inserted in the AC power supply socket 50 in S100. When inserted, the controller 90 conducts the third switch 80 and shuts off the other switches. Thereafter, the process returns to S90.

  If the remaining amount is insufficient in S90 and if no plug is inserted in S100, the controller 90 shuts off all switches in S120.

  In other words, the control method is an alternating current supply method. This AC current supply method includes a power storage unit that stores a DC current obtained from an external AC power source through AC-DC conversion, and an AC current that outputs an AC current obtained from the power storage unit through DC-AC conversion. Output means, and when power is supplied from an external AC power source and the AC current output means is used, the AC power output means does not pass through the power storage means to the AC current output means. This is a method of directly supplying an alternating current. In addition, there is selection providing means for allowing the user to make a selection before supplying an alternating current from an external alternating current power source to the alternating current output means.

In the present invention, the first switch 60 and the second switch 70 do not conduct at the same time. Thereby, the use of the AC power supply socket 50 and the charging of the storage battery 30 do not occur at the same time, and the power consumption in the vehicle 2 does not exceed the power supply capacity of the external AC power supply 3.
Furthermore, in the present invention, the second switch 70 and the third switch 80 do not conduct at the same time. Thereby, the use of the AC power socket 50 and the charging of the storage battery 30 do not occur at the same time, and the power consumption in the vehicle 2 does not exceed the power supply capacity of the external AC power supply.
In addition, the 2nd switch 70 and the 3rd switch 80 are made to conduct simultaneously by restricting the amount of current from the AC-DC converter 20 to the storage battery 30 so as not to exceed the power supply capacity of the external AC power supply 3. At this time, the use of the AC power supply socket 50 and the charging of the storage battery 30 can be generated simultaneously.

  In addition, this invention is not limited to the illustrated Example, The implementation by the structure of the range which does not deviate from the content described in each item of a claim is possible.

DESCRIPTION OF SYMBOLS 1 AC current supply apparatus 2 Vehicle 3 External AC power supply 10 AC power supply connection terminal 20 AC-DC converter 30 Storage battery 40 DC-AC converter 50 AC power supply socket 60 First switch 70 Second switch 80 Third switch 90 Controller 100 Warning display unit 110 Operation unit 120 Earth leakage breaker 130 Socket use detector 140 AC power connection terminal use detector 150 Charging state detector

Claims (4)

A first switch for conducting or blocking between an AC power socket that outputs an AC current converted by a DC-AC converter or an AC current from an external AC power supply, and an AC power connection terminal connected to the external AC power supply; Control
Controlling a second switch for conducting or blocking between the AC power supply connection terminal and an AC-DC converter that converts an AC current from the AC power supply connection terminal into a DC current;
A controller for controlling a third switch for conducting or blocking between a storage battery storing a direct current converted by the AC-DC converter and the AC power supply socket;
When the second switch is in a conductive state, when a socket usage detector that detects the use of the AC power socket detects the use of the AC power socket, the second switch is shut off and the first switch is turned on. A controller characterized by conducting. 2. The controller according to claim 1, wherein a warning is issued when the socket usage detector detects use of the AC power supply socket and the second switch is in a conductive state. 3. An AC power supply connection terminal use detector that detects the presence or absence of use of the AC power supply connection terminal detects use of the AC power supply connection terminal, and a socket use detector that detects presence or absence of use of the AC power supply socket When the use of an AC power socket is detected, the first switch is turned on, the second switch is turned off, the third switch is turned off,
When the AC power connection terminal use detector does not detect the use of the AC power connection terminal, and the socket use detector detects the use of the AC power socket, the first switch is shut off, Shut off the second switch, turn on the third switch,
When the AC power connection terminal use detector detects the use of the AC power connection terminal, and the socket use detector does not detect the use of the AC power socket, the first switch is shut off, and the first switch Conducting two switches and shutting off the third switch;
  The controller according to claim 1 or 2, characterized by the above-mentioned. Power storage means for storing a direct current obtained from an alternating current power supply through an alternating current-direct current conversion;
In an alternating current supply method for supplying alternating current, including alternating current output means for outputting alternating current obtained from the power storage means through direct current-alternating current conversion,
When using the AC current output means when the power storage means is storing DC current from the AC power supply, the power storage means stops storing DC current from the AC power supply, An alternating current supply method for supplying alternating current to the alternating current output means.