JP6505258B2 - Power conditioner - Google Patents

Description

  The present invention relates to a power conditioner used for an electric vehicle (hereinafter referred to as an EV).

  The power conditioner for EV has a function of converting the DC voltage generated by a lithium ion storage battery built in the electric vehicle at the time of a power outage into a system voltage of an alternating current as a source and supplying it to a home distribution board. The power consumed by the EV power conditioner itself is also obtained from the AC system voltage. However, at the time of a power failure, when the electric car does not return to the home, or does not start discharging even if the return occurs, the power conditioner for the EV uses its own power to obtain power from the electric car. Standby power is obtained from the storage battery built into the

  If the capacity of the storage battery is 12 Ah and the storage battery voltage is 24 V, assuming that the standby power of the EV power conditioner including the microcomputer operating at all times is 24 W, a current of 24 W / 24 V = 1 A flows. The storage battery can maintain standby operation only for 12 Ah / 1A = 12 h, ie 12 hours. If the standby operation can not be maintained, the EV power conditioner can not be started, and thereafter, even if the electric vehicle is connected, the AC system voltage can not be obtained.

  In order to prevent this, when it detects a power failure, it automatically energizes only the start circuit of the device and stops the other control circuits. It enters sleep mode to suppress standby power, and presses a switch for power recovery from the sleep mode state. A method has been proposed to return to the normal mode. Patent Document 1 describes a method for reducing standby power by shutting off the power supply of a microcomputer with a transistor in the sleep mode.

JP, 2009-44841, A

  However, in equipment that is normally activated at all times, such as EV power conditioners, pressing an emergency switch that is not normally used when a power failure occurs performs an immediate action in an emergency. There was a problem of inhibition. In addition, if the manual switch is used to start from the sleep state, standby power is not required, but there is a problem that the power failure can not be detected and the device can not be put to sleep automatically.

  The present invention has been made in view of the above, and it is an object of the present invention to provide an EV power conditioner capable of releasing the sleep state without newly providing a switch or button for releasing the sleep state. .

  In order to solve the problems described above and achieve the object, the present invention is connected to a main circuit that converts a DC voltage to an AC voltage and outputs the converted voltage to a first terminal to which a system is connected, and a first terminal An AC-DC voltage converter that converts an AC voltage output from the main circuit or system into a first DC voltage and outputs the first DC voltage to a second terminal, a storage battery stored by the first DC voltage, and a second terminal Connected with the first DC-DC voltage converter which converts the first DC voltage into the second DC voltage, and operated by the second DC voltage, it detects whether or not the voltage at the first terminal is in a power failure state And a control circuit that generates a sleep command signal, and a voltage detection circuit that outputs, as a voltage detection signal, the magnitude relationship between the voltage of the second terminal and the reference voltage. The present invention relates to a second DC-DC voltage converter that converts the voltage of a storage battery into a third DC voltage and supplies it to an external device, and an external device current that the second DC-DC voltage converter supplies to an external device A current detection circuit that outputs a magnitude relation with a reference current as a current detection signal; and a switch that opens and closes a connection between a second terminal and a storage battery based on a sleep command signal, a voltage detection signal, and a current detection signal And a switch for setting the second terminal and the storage battery in a connected state when a change in the current detection signal is detected when the voltage of one terminal is in a power failure state and the second terminal and the storage battery are not connected. , And.

  According to the present invention, it is possible to release the sleep state without newly providing a switch or button for releasing the sleep state.

FIG. 1 shows a configuration of an EV power conditioner 100 according to a first embodiment of the present invention. A timing chart for explaining a state transition from the normal time to the sleep state through the occurrence of a power failure according to the first embodiment Timing chart for explaining state transition from the sleep state to the start of the autonomous operation according to the first embodiment

  Below, the power conditioner concerning embodiment of this invention is demonstrated in detail based on drawing. The present invention is not limited by the embodiment.

Embodiment 1
FIG. 1 is a diagram showing a configuration of an EV power conditioner 100 according to a first embodiment of the present invention. The EV power conditioner 100 includes a main circuit 16 which is a bi-directional power converter, and a blackout stop / return circuit 30 which controls the operation at the time of power failure occurrence and return. The main circuit 16 and the blackout stop and return circuit 30 are both connected to a first terminal 18 connected to the grid 20. The main circuit 16, which is a bi-directional power converter, has both functions of converting alternating current voltage to direct current voltage and converting direct current voltage to alternating current voltage. A home distribution board 15 is also connected to the first terminal 18.

  The blackout stop and return circuit 30 includes an AC (Alternating Current) / DC (Direct Current) power supply 1 which is an AC DC voltage converter, a switch A2 which is a first switch, and a DC which is a first DC DC voltage converter. / DC power supply A3, storage battery 4, control circuit 5, AND circuit 10, current detection circuit 11, DC / DC power supply B12 which is a second DC-DC voltage converter, and switch B13 which is a second switch And a voltage V1 detection circuit 14 which is a voltage detection circuit. The control circuit 5 includes a power failure detection circuit 6, a sleep signal generation circuit 7, and a microcomputer 8.

  The AC / DC power supply 1 is connected to the first terminal 18. The AC / DC power supply 1 receives the system voltage V0, which is an AC voltage from the system 20, from the first terminal 18, and AC / DC converts the system voltage V0 into a battery voltage V1, which is a first DC voltage. Output to the two terminals 19. The DC / DC power supply A3 connected to the second terminal 19 and having the battery voltage V1 input thereto performs DC / DC conversion of the battery voltage V1 to a control circuit power supply voltage V2 which is a second DC voltage suitable for the control circuit 5 .

  The power failure detection circuit 6 detects the voltage of the first terminal 18, detects whether or not it is in a power failure state, and notifies the microcomputer 8 of a power failure detection signal indicating that a power failure has been detected in the power failure state. . The microcomputer 8 determines whether or not the storage battery 4 is to be energized based on the information on whether or not the power failure state given from the power failure detection circuit 6 and the elapsed time from the detection of the power failure, and a sleep signal generating circuit Send a sleep command to 7. The sleep command is a command instructing to enter the sleep state, and in the sleep state, the second terminal 19 and the storage battery 4 are disconnected, the DC / DC power supply A3 is disconnected from the storage battery 4, and the microcomputer is 8 is the state which stopped operation. The sleep state is a state for suppressing consumption of the storage battery 4 at the time of a power failure. The sleep command signal output from the sleep signal generation circuit 7 having received the sleep command in response to the sleep command is input to the AND circuit 10. The sleep command signal is a normal high signal, and is normally pulled up to "H", but is "L" only while the sleep signal generation circuit 7 receives a sleep command from the microcomputer 8. . Thereafter, since the microcomputer 8 stops its operation when actually shifting to the sleep state, the sleep command signal returns to "H".

  The voltage V1 detection circuit 14 detects the battery voltage V1 which is the voltage of the second terminal 19 input to the DC / DC power supply A3, and detects the magnitude relationship between the battery voltage V1 and the predetermined reference voltage Vref as a voltage detection signal. Output as Specifically, it is determined whether battery voltage V1 is equal to or higher than reference voltage Vref, and a V1 detection signal which is a voltage detection signal is output to AND circuit 10 as a determination result. Specifically, when V1 ≧ Vref, the V1 detection signal is “H”, and when V1 <Vref, the V1 detection signal is “L”.

  The AND circuit 10 receives the sleep command signal from the sleep signal generation circuit 7 and the V1 detection signal from the voltage V1 detection circuit 14, calculates the logical product of the both, and outputs it to the switch A2.

  The switch A 2 performs an operation of connecting or disconnecting the DC / DC power supply A 3 and the storage battery 4 based on the output signal of the AND circuit 10. Specifically, when the output signal of the AND circuit 10 is "H", it switches to short circuit, ie, connected state, and when the output signal of the AND circuit 10 is "L", it switches to open, ie, disconnected state.

  The storage battery 4 is a backup battery, and in the state where the second terminal 19 and the storage battery 4 are connected, when the AC / DC power supply 1 outputs, it is charged by the supplied battery voltage V1, and AC / DC When the power supply 1 is stopped, the battery voltage V1 is supplied to the DC / DC power supply A3.

  The DC / DC power supply B12 is a DC / DC converter that converts the voltage of the storage battery 4 into a third DC voltage that is a reasonable voltage and supplies the third DC voltage via the power supply line 21 to the display 9 that is an external device. Therefore, when the second terminal 19 and the storage battery 4 are connected and the voltage of the second terminal 19 is the battery voltage V1, the voltage of the storage battery 4 is also the battery voltage V1, so that the DC / DC power supply B12 The voltage V1 is converted to the appropriate voltage and supplied to the display 9.

  The display 9 displays the operating state of the EV power conditioner 100 by the communication signal from the microcomputer 8. The display 9 also has a function of receiving an operation of the user and transmitting an instruction to the microcomputer 8. The display 9 is configured by a device such as a touch panel, and operates as an input / output device of the user.

  The current detection circuit 11 detects an external device current I1 which is an output current supplied by the DC / DC power supply B12 to the display 9, and detects a magnitude relation between the external device current I1 and a predetermined reference current Iref as a current detection signal Output as Specifically, it is determined whether the external device current I1 is equal to or greater than the reference current Iref, and as a determination result, the I1 detection signal, which is a current detection signal, is output to the switch B13. Specifically, the I1 detection signal is “H” when I1 ≧ Iref, and the I1 detection signal is “L” when I1 <Iref. When the user operates the display 9, the external device current I1 consumed by the display 9 increases. Therefore, when the user operates the display 9, the external device current I1 changes, and when it becomes Iref or more, the I1 detection signal becomes “H”.

  The switch B13 is connected in parallel with the switch A2 between the second terminal 19 and the storage battery 4 and is connected or disconnected between the second terminal 19 and the storage battery 4 based on the I1 detection signal. Do the action. Specifically, when the I1 detection signal is "H", the switch switches to the short or connected state, and when the I1 detection signal is "L", the switch switches to the open or disconnected state. Since switch B13 and switch A2 are connected in parallel, switch A2 and switch B13 actually disconnect between second terminal 19 and storage battery 4, that is, between DC / DC power supply A3 and storage battery 4 "L" is input to both of.

  The microcomputer 8 sends a main circuit control signal to the main circuit 16 for control. The main circuit 16 is connected to the grid 20 and the in-home distribution board 15 via the first terminal 18. The main circuit 16 is also connected to the storage battery 17 in the electric vehicle via another terminal not connected to the first terminal 18. The main circuit 16 performs AC / DC conversion on the system voltage V0 output from the system 20 to the first terminal 18 to generate an EV battery voltage V3 and charge the storage battery 17 in the electric vehicle. Alternatively, main circuit 16 performs DC / AC conversion from EV battery voltage V3 generated by storage battery 17 in the electric vehicle to generate grid voltage V0 and output it to first terminal 18, and power is supplied to home distribution board 15. Supply. Thus, the main circuit 16 functions as a bidirectional power converter.

  When the grid 20 is in the uninterrupted normal state, the grid voltage V0 is input from the grid 20 to the AC / DC power supply 1, and the AC / DC power supply 1 outputs the battery voltage V1. The battery voltage V1 is input to the DC / DC power supply A3, and the DC / DC power supply A3 outputs the control circuit power supply voltage V2 and supplies it to the control circuit 5.

  In control circuit 5, when system voltage V0 is a normal voltage, power failure detection circuit 6 does not output a power failure detection signal to microcomputer 8, and microcomputer 8 sends a command to sleep signal generation circuit 7 as a sleep command signal. Output “H”. In the normal state, since the battery voltage V1 is equal to or higher than the reference voltage Vref, the voltage V1 detection circuit 14 outputs “H” to the AND circuit 10 as a V1 detection signal. The AND circuit 10 which receives "H" as the sleep command signal and "H" as the V1 detection signal outputs "H" to the switch A2, so that the switch A2 is shorted. Thereby, the battery voltage V1 is also supplied to the storage battery 4 via the switch A2, and the storage battery 4 is charged.

  The switch B13 is connected between the second terminal 19 and the storage battery 4 in parallel with the switch A2. Therefore, when the grid 20 is in the uninterrupted normal state, the switch A2 is short-circuited, and the storage battery 4 is DC / A regardless of the connection state of the switch B13 regardless of the value of the external device current I1. It will be in the state connected with DC power supply A3.

  At the time of a power failure of the grid 20, the EV power conditioner 100 detects the power failure, and displays on the display 9 that the power is in a power failure state. Specifically, the power failure detection circuit 6 outputs a power failure detection signal to the microcomputer 8, and based on this, the microcomputer 8 displays on the display 9 that the power is in a power failure state.

  At the time of a power failure, the user operates the display 9, and the microcomputer 8 transmits a main circuit control signal to the main circuit 16 to cause the main circuit 16 to generate the grid voltage V0 from the storage battery 17 in the electric vehicle Is immediately started, the system voltage V0 is output from the main circuit 16.

  On the other hand, if the electric vehicle can not be immediately connected to the EV power conditioner 100 at the time of a power failure, the storage battery 17 in the electric vehicle can not be immediately connected to the main circuit 16. If the system voltage V0 continues to disappear for this reason, the system voltage V0 is not input to the AC / DC power supply 1, and the output of the AC / DC power supply 1 stops, but the battery voltage V1 is output before the power failure. Since the V1 detection signal output from the voltage V1 detection circuit 14 is "H" and the switch A2 is short-circuited, the storage battery 4 starts discharging and the battery voltage V1 is supplied to the DC / DC power supply A3. The control circuit power supply voltage V2 is supplied from the DC / DC power supply A3 to the control circuit 5 in the same manner as before the power failure. In this state, since the control circuit 5 performs standby operation using the storage battery 4 as a power supply, the storage amount of the storage battery 4 continues to decrease, but the electric vehicle is connected to the EV power conditioner 100 and the user operates the display 9 When self-sustaining operation is started, the AC / DC power supply 1 operates and outputs the battery voltage V1, so the storage battery 4 is charged again.

  On the other hand, the main circuit 16 does not generate the system voltage V0 from the storage battery 17 in the electric vehicle when the self-supporting operation can not be started immediately because the electric vehicle does not exist near the installation place of the EV power conditioner 100. Continues for a predetermined time Tref or more, the microcomputer 8 detects it by the power failure detection signal of the power failure detection circuit 6, sends a sleep command to the sleep signal generation circuit 7, and sets the sleep command signal to "L". To indicate. The sleep signal generation circuit 7 having received the sleep command outputs "L" as the sleep command signal to the AND circuit 10. Thus, the AND circuit 10 outputs "L" to the switch A2 regardless of the state of the V1 detection signal which is the other input of the AND circuit 10. When the switch A2 receives "L" from the AND circuit 10, the switch A2 is in the open state and the switch B13 is also in the open state, the DC / DC power supply A3 is disconnected from the storage battery 4 and the microcomputer 8 stops operating. become. In the sleep state, neither the main circuit 16 nor the control circuit 5 operates, and the storage battery 4 supplies power to a limited circuit including the display 9 and the current detection circuit 11 via the DC / DC power supply B12.

  When the electric vehicle becomes connectable to the EV power conditioner 100 and the user operates the display 9 to display the status of the EV power conditioner 100, the external device current I1 is increased by the current detection circuit 11 Detects “I” and outputs “H” as an I1 detection signal to short-circuit the switch B13. When the switch B13 is in a short circuit state, the storage battery 4 supplies power to the DC / DC power supply A3 and the DC / DC power supply A3 supplies power to the control circuit 5, so the microcomputer 8 starts operation to sleep. Is released.

  FIG. 2 shows a timing chart of the state change from the normal time to the sleep state after the occurrence of a power failure according to the first embodiment. The horizontal axis in FIG. 2 is time, and the time change of the system voltage V0, power failure detection signal, sleep command signal, output of AND circuit 10, switch A2, battery voltage V1, V1 detection signal, I1 detection signal and switch B13 The situation is shown.

  In FIG. 2, when a power failure occurs at time t1 and the system voltage V0 changes from a normal voltage to an abnormal voltage, a power failure detection signal output from the power failure detection circuit 6 to the microcomputer 8 changes from a non-detection state to a detection state. The microcomputer 8 sends a sleep command to the sleep signal generation circuit 7 at time t2 when the detection state lasts for a predetermined time Tref from the time when the power failure detection signal changes from the non-detection state to the detection state. The received sleep command signal output from the sleep signal generation circuit 7 changes from "H" to "L", and maintains the state of "L" for a certain period. The V1 detection signal which is the output of the voltage V1 detection circuit 14 is "H" until time t2, and the output of the AND circuit 10 is "H" until time t2. However, since the sleep command signal becomes "L" after time t2, the output of the AND circuit 10 becomes "L" and the switch A2 becomes open. On the other hand, since the display 9 is not operated in the period from time t1 to time t2, the I1 detection signal which is the output of the current detection circuit 11 is always "L", and the switch B13 is open. Accordingly, since both the switch A2 and the switch B13 are open at time t2, the DC / DC power supply A3 is disconnected from the storage battery 4 and enters the sleep state. In the sleep state at time t2, the voltage of the battery voltage V1 becomes smaller than Vref, and the V1 detection signal which is the output of the voltage V1 detection circuit 14 becomes "L". Then, after time t2, the control circuit power supply voltage V2 is not supplied to the microcomputer 8, so the sleep command signal becomes "H" after maintaining the state of "L" for a certain period as described above. Since the signal is "L", the output of the AND circuit 10 remains "L" and the switch A2 maintains the open state. Further, since the control circuit power supply voltage V2 is not supplied to the control circuit 5 in the sleep state, the power failure detection signal which is the output of the power failure detection circuit 6 becomes "L". Thus, after the time t2, the sleep state is maintained.

  FIG. 3 shows a timing chart for explaining state transition from the sleep state to the start of the autonomous operation according to the first embodiment. The horizontal axis in FIG. 3 is time, and system voltage V0, power failure detection signal, sleep command signal, output of AND circuit 10, switch A2, I1 detection signal, switch B13, battery voltage V1, V1 detection signal, control circuit power supply voltage The time change of each of V2 and the main circuit control signal is shown.

  The first state of FIG. 3 is the sleep state which is the last state of FIG. That is, the system voltage V0 is an abnormal voltage, the power failure detection signal is not detected, the sleep command signal is "H", the output of the AND circuit 10 is "L", and the switch A2 and the switch B13 are Both are open. As described above, since the control circuit power supply voltage V2 is not supplied to the control circuit 5 in the sleep state, the control circuit power supply voltage V2 is "L" and the main circuit control signal is stopped in the initial state of FIG. .

  At time t3 in FIG. 3, when the user operates the display 9, the current detection circuit 11 detects an increase in the external device current I1 and sets the I1 detection signal to "H". The switch B13 to which "H" is input as the I1 detection signal is short-circuited, and the storage battery 4 and the DC / DC power supply A3 are connected to cancel the sleep state. When the sleep state is released, the battery voltage V1 becomes “H” and becomes higher than Vref, so the V1 detection signal output from the voltage V1 detection circuit 14 becomes “H”. Further, when the battery voltage V1 becomes "H", the control circuit power supply voltage V2 output from the DC / DC power supply A3 becomes "H". When the control circuit power supply voltage V2 becomes "H", the circuit operation of the control circuit 5 becomes possible, and the user can operate the display 9 to send an instruction to start the self-sustaining operation to the microcomputer 8.

  Thereafter, at time t4 in FIG. 3, when the user operates the display 9 to send an instruction to start the stand-alone operation to the microcomputer 8, the main circuit control signal becomes the stand-alone operation state, and the storage battery 17 in the electric vehicle Main circuit 16 generates system voltage V0. As a result, although the grid 20 is still in a power failure state, the grid voltage V0 returns to a normal voltage, and the power failure detection signal returns to a non-detection state.

  The EV power conditioner 100 according to the first embodiment sleeps at the time of a power failure when the user causes the user to display the operation state of the EV power conditioner 100 or the user operates the EV power conditioner 100. It has a circuit configuration that also recognizes as an operation to recover from the state. This makes it possible to release the sleep state without specially performing an operation necessary for returning from the sleep state at the time of a power failure that occurs rarely.

  That is, without providing a special switch for emergency, the change of the user's operation in the sleep state at the time of power failure is detected in the sleep state at the time of power failure, and the sleep state is canceled. . As a result, in the event of a power failure or the like, the user can release the sleep state without requiring an operation such as operation of a switch or button which is not normally operated or viewing of a special manual.

  As described above, according to the EV power conditioner 100 according to the first embodiment, a new device such as a switch or a button for releasing the sleep is provided while having a function of automatically shifting to the sleep state at the time of a power failure. Do not need In the sleep state, only the circuit for start-up needs to be energized, and there is a problem that the power used for that is consumed. However, according to the EV power conditioner 100 according to the first embodiment, the sleep is In the state, since it is not necessary to supply power to the control circuit 5 and only the limited power consumed by the display 9 is consumed, the power consumed by the blackout stop and return circuit 30 can be suppressed. Further, since the operation performed on the display unit 9 for canceling the sleep state is a normal operation, an effect that the operation is not caused even if the operation is not in the sleep state can be obtained.

  In the above description, although control circuit 5 is described as having a configuration in which power failure detection circuit 6, sleep signal generation circuit 7 and microcomputer 8 are mounted, it is not always necessary to realize control circuit 5 with such a configuration. There is no. Specifically, the microcomputer 8 may realize the functions of the power failure detection circuit 6 and the sleep signal generation circuit 7. In this case, only the microcomputer 8 is mounted on the control circuit 5.

  Moreover, in FIG. 1, the switch between the 2nd terminal 19 and the storage battery 4 was comprised by two switches which consist of switch A2 and switch B13 which were connected in parallel. As a result, when the main switch A2 is configured to consume a large amount of power even in the standby state, the power supply to the switch A2 is completely cut off in the sleep state, and only the circuit of the switch B13 requiring only small power consumption. Power can be supplied to reduce power consumption.

  However, the switch between the second terminal 19 and the storage battery 4 does not necessarily have to be configured with two switches. Specifically, one switch may be controlled using the output signals of the AND circuit 10 and the current detection circuit 11. That is, by controlling one switch based on the sleep command signal, the V1 detection signal, and the I1 detection signal, it is sufficient that the same operation as in the case of using two switches can be realized.

  In addition, as long as the display 9 displays the operation state of the EV power conditioner 100 in response to a signal from the microcomputer 8, the display 9 can be operated by remote control using a wired connection or at a remote place via a wireless transceiver. Can also be realized with a wireless remote control. In particular, when using a wireless remote control, if the power supply of the wireless transceiver is DC / DC power supply B12, radio waves from the wireless remote control are received by the wireless transceiver by the user's operation of the wireless remote control. Since the power supply current of the wireless transceiver changes, by causing the current detection circuit 11 to detect the change, the same effect as in the case of wired wiring can be obtained.

  The configuration shown in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and one of the configurations is possible within the scope of the present invention. Parts can be omitted or changed.

  DESCRIPTION OF SYMBOLS 1 AC / DC power supply, 2 switches A, 3 DC / DC power supplies A, 4 storage batteries, 5 control circuits, 6 power failure detection circuits, 7 sleep signal generation circuits, 8 microcomputers, 9 displays, 10 AND circuits, 11 current detection Circuit, 12 DC / DC power supply B, 13 switch B, 14 voltage V1 detection circuit, 15 indoor distribution board, 16 main circuit, 17 electric car storage battery, 18 first terminal, 19 second terminal, 20 systems, 21 power supply Line, 30 blackout stop and return circuit, 100 EV power conditioner.

Claims (3)

A main circuit that converts a DC voltage into an AC voltage and outputs the converted voltage to a first terminal to which a system is connected;
An AC-DC voltage converter connected to the first terminal to convert the AC voltage output from the main circuit or the system into a first DC voltage and output the first DC voltage to the second terminal.
A storage battery which is stored by the first direct current voltage;
A first DC-DC voltage converter connected to the second terminal to convert the first DC voltage into a second DC voltage;
A control circuit which operates with the second direct current voltage, detects whether or not the voltage of the first terminal is in a power failure state, and generates a sleep command signal;
A voltage detection circuit which outputs, as a voltage detection signal, a magnitude relation between a voltage of the second terminal and a reference voltage;
A second DC-DC voltage converter that converts the voltage of the storage battery into a third DC voltage and supplies it to an external device;
A current detection circuit that outputs, as a current detection signal, a magnitude relation between an external device current supplied to the external device by the second DC / DC voltage converter and the reference current;
A switch for opening and closing a connection between the second terminal and the storage battery based on the sleep command signal, the voltage detection signal, and the current detection signal, wherein the voltage of the first terminal is in a power failure state, and A switch that brings the second terminal and the storage battery into a connection state when a change in the current detection signal is detected when the second terminal and the storage battery are not connected;
A power conditioner characterized by comprising. The power conditioner according to claim 1, wherein the control circuit includes a power failure detection circuit that detects whether the voltage of the first terminal is in a power failure state and a microcomputer that controls the main circuit. The switch comprises a first switch and a second switch connected in parallel between the second terminal and the storage battery,
The first switch is controlled by the sleep command signal and the voltage detection signal,
The power conditioner according to claim 1, wherein the second switch is controlled by the current detection signal.

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