JP2017220959A - Charge/discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charge/discharge device which can improve communication accuracy through a cable.SOLUTION: A charge/discharge device 10 includes a cable 30, a connector part 31, a body part 20, and a communication module 33. The connector part 31 can be attached to an inlet C1 of a vehicle C. The cable 30 has the connector part 31. The body part 20 performs charge and discharge operation through power lines W5, W6 in the cable 30. The communication module 33 is disposed on the connector part 31, to convert each analog signal, which is input to analog terminals T2, T4, T7, T10 of the connector part 31 from the vehicle C, into each digital signal to transmit to the body part 20, and converts each digital signal transmitted from the body part 20 into each analog signal to input to the analog terminals T2, T4, T7, T10 of the connector part 31.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a charge / discharge device.

  Conventionally, there is a discharge device described in Patent Document 1. The discharge device described in Patent Literature 1 includes a power receiving device and a cable. The cable connects the vehicle and the power receiving device. In the discharge device described in Patent Document 1, when the vehicle and the power receiving device are connected via a cable, the control signal is transmitted and received between the power receiving device and the vehicle, thereby discharging the vehicle to the power receiving device. Do. The cable is provided with a plurality of signal lines for transmitting a plurality of control signals in addition to a power supply line for transmitting power from the vehicle to the power receiving device.

Japanese Patent Laying-Open No. 2015-130736

  In the discharge device described in Patent Document 1, a power supply line and a plurality of signal lines are arranged side by side. In such a discharge device, an analog line is often used as a signal line. Therefore, if the power line and the signal line are arranged side by side, a control signal transmitted to the signal line is transmitted from the power line. Susceptible to noise. This is a factor that lowers the communication system between the vehicle and the power receiving device.

  Moreover, since the length of the cable is set to various lengths according to the use application of the discharge device, there is a problem that the intensity of the control signal transmitted to the signal line is easily attenuated. This is also one of the factors that lower the communication system between the vehicle and the power receiving device.

  Such a problem is not limited to the discharge device that discharges from the vehicle to the power receiving device, but is a problem common to the charge / discharge device that can perform at least one of charging to the vehicle and discharging from the vehicle. is there.

  This invention is made | formed in view of such a situation, The objective is to provide the charging / discharging apparatus which can improve the communication precision via a cable.

  In order to solve the above problems, the charging / discharging device (10) includes a cable (30), a connector part (31), a main body part (20), and a communication conversion part (33). The connector part can be attached to the inlet (C1) of the vehicle (C). The cable has a connector portion. The main body is configured to charge the vehicle battery (B) by supplying power to the vehicle via the power lines (W5, W6) in the cable, and to supply the electric power discharged from the vehicle battery in the cable. At least one of the discharging operations to be taken out through the power line is performed. The communication conversion unit is provided in the connector unit, converts an analog signal input from the vehicle to the analog terminals (T2, T4, T7, T10) of the connector unit into a digital signal and transmits the digital signal to the main unit, and from the main unit. The digital signal to be transmitted is converted into an analog signal and input to the analog terminal of the connector unit.

  According to this configuration, since the communication between the connector unit and the main body unit is performed by digital communication, the signal used in the communication between them is influenced by the noise from the power line in the cable or the length of the cable. It becomes difficult to be affected by the attenuation of the signal strength due to the above. Therefore, the communication accuracy via a cable can be improved.

  In addition, the code | symbol in the bracket | parenthesis as described in the said means and a claim is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

  ADVANTAGE OF THE INVENTION According to this invention, the charging / discharging apparatus which can improve the communication precision via a cable can be provided.

FIG. 1 is a block diagram illustrating a schematic configuration of the charge / discharge device according to the first embodiment. FIG. 2 is a block diagram illustrating a schematic configuration of the charge / discharge device according to the second embodiment. FIG. 3 is a block diagram illustrating a schematic configuration of the charge / discharge device according to the third embodiment. FIG. 4 is a block diagram showing a schematic configuration of the charge / discharge device of the fourth embodiment. FIG. 5 is a block diagram illustrating a schematic configuration of a charge / discharge device according to a modification of the fourth embodiment. FIG. 6 is a block diagram illustrating a schematic configuration of the charging / discharging device of the fifth embodiment.

<First Embodiment>
Hereinafter, 1st Embodiment of a charging / discharging apparatus is described.
The charging / discharging device 10 shown in FIG. 1 performs a charging operation for supplying electric power to the battery B of the vehicle C by supplying electric power to the vehicle C, and a discharging operation for extracting electric power discharged from the battery B of the vehicle C. It is a possible device. The battery B is composed of, for example, a nickel metal hydride battery or a lithium ion battery.

The charging / discharging device 10 includes a main body unit 20, a cable 30, and a connector unit 31.
One end of the cable 30 is connected to the main body 20. A connector portion 31 is provided at the other end of the cable 30.

  The connector part 31 can be attached to an inlet C1 provided in the vehicle C. That is, the cable 30 is connected to the inlet C <b> 1 of the vehicle C via the connector portion 31. The connector unit 31 includes ten terminals T1 to T10, a lock circuit 32, and a communication module 33.

  Terminals T1 to T10 conform to the CHAdeMO (registered trademark) standard. When the connector part 31 is attached to the inlet C1 of the vehicle C, the terminals T1 to T10 are connected to any one of the battery B, the power source C2, the CAN circuit C3, and the control signal communication part C4.

  Specifically, the fifth terminal T5 is connected to the high potential side terminal of the battery B. The sixth terminal T6 is connected to the low potential side terminal of the battery B, in other words, the ground of the vehicle C. The third terminal T3 is connected to the power source C2. A predetermined voltage, for example, a voltage of “12 [V]” is applied from the battery B to the power source C2. The first terminal T1 is connected to the ground of the vehicle C. The eighth terminal T8 and the ninth terminal T9 are connected to the CAN circuit C3 of the vehicle C. The CAN circuit C <b> 3 is a circuit for performing CAN communication with the main body unit 20. The second terminal T2, the fourth terminal T4, the seventh terminal T7, and the tenth terminal T10 are connected to the control signal communication unit C4. The control signal communication unit C4 is a circuit for exchanging control signals with the main body unit 20. The control signal is a signal used when the battery B is charged and discharged. The control signal exchanged between the control signal communication unit C4 and each of the terminals T2, T4, T7, T10 is an analog signal. In the present embodiment, the terminals T2, T4, T7, and T10 correspond to analog terminals.

  The connector part 31 has a latch that can be hooked to a predetermined part of the inlet C1. When the latch is hooked on the inlet C1 of the vehicle C, the connector portion 31 and the inlet C1 are mechanically fixed.

  The lock circuit 32 is a circuit that fixes the connector portion 31 to the inlet C1 based on the supply of electric power. Based on the supply of electric power, the lock circuit 32 electrically maintains the locked state of the mechanical connector portion 31 by the latch, and releases the locked state by the latch when the supply of electric power is interrupted. The operation of the lock circuit 32 is controlled by the communication module 33.

  The communication module 33 is connected to terminals T8 and T9 via CAN communication lines W8 and W9. The communication module 33 is connected to terminals T2, T4, T7, and T10 via analog lines W2, W4, W7, and W10, respectively. The communication module 33 converts an analog signal input from the control signal communication unit C4 to the terminals T2, T4, T7, and T10 into a digital signal. The communication module 33 transmits the converted digital signal and the signals input to the terminals T8 and T9 from the CAN circuit C3 to the main body 20 via the signal lines W11 and W12 in the cable 30. The communication module 33 converts the digital signal transmitted from the main body 20 into an analog signal and inputs the analog signal to the terminals T2, T4, T7, and T10 via the analog lines W2, W4, W7, and W10. Furthermore, when the digital signal transmitted from the main unit 20 is a signal used for CAN communication, the communication module 33 inputs this signal to the terminals T8 and T9 via the CAN communication lines W8 and W9. Thus, the communication module 33 of the present embodiment corresponds to a communication conversion unit.

  The communication module 33 is electrically connected to a power supply line W3 and a ground line W1 connected to the third terminal T3 and the first terminal T1, respectively. Power is supplied between the power supply line W3 and the ground line W1 from the power supply C2 and the ground of the vehicle C or from the communication control unit 22 of the main body 20. Based on the power supplied from the power supply line W3 and the ground line W1, that is, based on the power supplied from the vehicle C or the main body 20, the operating power of the communication module 33 is secured. Further, the communication module 33 switches the lock state and the release state of the lock circuit 32 by supplying and shutting off the power to the lock circuit 32.

  The cable 30 has a harness structure in which power lines W5 and W6, a power line W3, and a ground line W1 are bundled in addition to the signal lines W11 and W12. The power supply lines W5 and W6 are connected to the terminals T5 and T6 of the connector part 31, respectively. That is, the power lines W5 and W6 connect the battery B of the vehicle C and the main body 20 via the terminals T5 and T6. The power line W3 is connected to the power source C2 of the vehicle C via the terminal T3. The ground line W1 is connected to the ground of the vehicle C via the first terminal T1.

  The main body unit 20 includes a power conversion unit 21, a communication control unit 22, and a charge / discharge control unit 23.

  When the charging / discharging device 10 performs a charging operation, the power conversion unit 21 converts, for example, AC power supplied from the power system into DC power that can charge the battery B of the vehicle C. Further, when the charging / discharging device 10 performs a discharging operation, the power conversion unit 21 converts the DC power discharged from the battery B of the vehicle C into AC power that can be supplied to an arbitrary load.

  The communication control unit 22 is connected to the communication module 33 of the connector unit 31 via signal lines W11 and W12 in the cable 30. The communication control unit 22 is a part that exchanges digital signals with the communication module 33 via the signal lines W11 and W12, that is, a part that performs digital communication. The communication control unit 22 transmits a digital signal transmitted from the communication module 33 to the charge / discharge control unit 23. Moreover, the communication control part 22 transmits the control signal transmitted from the charging / discharging control part 23 to the communication module 33 with a digital signal.

  The charge / discharge control unit 23 performs the charging operation and the discharging operation of the charging / discharging device 10 by controlling the power conversion unit 21 while communicating with the vehicle C via the communication control unit 22.

  The vehicle C includes a vehicle control unit C5 and a contactor C6 in addition to the CAN circuit C3 and the control signal communication unit C4.

  Contactor C6 is arranged on a power supply line connecting battery B and inlet C1. That is, when the contactor C6 is turned on, charging or discharging of the battery B via the fifth terminal T5 and the sixth terminal T6 is permitted. Further, when the contactor C6 is turned off, charging or discharging of the battery B via the fifth terminal T5 and the sixth terminal T6 is stopped.

  The vehicle control unit C5 controls charging and discharging of the battery B of the vehicle C by communicating with the charging / discharging device 10 via the CAN circuit C3 and the control signal communication unit C4.

  Next, an operation example of the charge / discharge device 10 will be described. Note that the contactor C6 of the vehicle C is in an off state during normal times.

  In the charging / discharging device 10, when the connector portion 31 is attached to the inlet C <b> 1 of the vehicle C, the vehicle C and the charging / discharging device 10 are connected via the cable 30. At this time, the first terminal T <b> 1 of the connector portion 31 is connected to the ground of the vehicle C, and thus becomes a ground potential. Further, the third terminal T3 of the connector part 31 is connected to the power source C2 of the vehicle C, and thus has a predetermined potential corresponding to the power source C2. That is, when the operating power of the communication module 33 is secured from the vehicle C, the operating power of the communication module 33 is secured by attaching the connector portion 31 to the inlet C1 of the vehicle C.

  In addition, when the operating power of the communication module 33 is secured from the communication control unit 22 of the main body unit 20, regardless of whether or not the connector unit 31 is attached to the inlet C <b> 1 of the vehicle C, Needless to say, operating power is secured.

  Thereafter, the charging / discharging control unit 23 sends a charging start signal to the communication control unit 22 when starting charging of the battery B of the vehicle C and starting a discharging of the battery B of the vehicle C. Send. When the communication control unit 22 receives the charge start signal or the discharge start signal transmitted from the charge / discharge control unit 23, the communication control unit 22 outputs a digital signal corresponding to the charge start signal or the discharge start signal via the signal lines W11 and W12. To the communication module 33.

  When the communication module 33 receives the charge / discharge start signal or the discharge start signal, the communication module 33 inputs an analog signal corresponding to the trigger signal permitting charge or discharge to the second terminal T2 via the analog line W2. This trigger signal is a logic high level signal. The trigger signal is received by the control signal communication unit C4 of the vehicle C, and the fact is transmitted to the vehicle control unit C5. The vehicle control unit C5 starts the charge preparation process or the discharge preparation process based on the reception of the trigger signal. That is, the trigger signal is a signal transmitted from the charge / discharge device 10 and is a signal that triggers the start of the charge preparation process or the discharge preparation process.

  When the charge preparation process and the discharge preparation process are started, first, the vehicle control unit C5 and the charge / discharge control unit 23 connect the CAN communication lines W8 and W9, the communication module 33, the signal lines W11 and W12, and the communication control unit 22. Via CAN communication.

  In this CAN communication, first, the vehicle control unit C5 transmits information on the battery B to the charge / discharge control unit 23. Specifically, when the battery B is charged, the vehicle control unit C5 transmits information such as the maximum charge power, battery capacity, and maximum charge time of the battery B to the charge / discharge control unit 23. When the battery B is discharged, the vehicle control unit C5 transmits information such as the maximum discharge power, battery capacity, and maximum discharge time of the battery B to the charge / discharge control unit 23.

  Thereafter, the charging / discharging control unit 23 charges the battery B based on the power supplied from the charging / discharging device 10 or discharges from the battery B to the charging / discharging device 10 based on the information transmitted from the vehicle control unit C5. It is determined whether or not it is possible. When the charge / discharge control unit 23 determines that the battery B can be charged or discharged from the charge / discharge device 10, the charge / discharge control unit 23 transmits information on the charge / discharge device 10 side to the vehicle control unit C5. Specifically, when the battery B is charged, the charge / discharge control unit 23 transmits information on the maximum power that can be supplied by the power conversion unit 21 to the vehicle control unit C5. When the battery B is discharged, the charge / discharge control unit 23 transmits information on the maximum power that can be received by the power conversion unit 21 to the vehicle control unit C5.

  The vehicle control unit C5 determines whether or not the battery B can be charged or discharged based on the information transmitted from the charge / discharge control unit 23. When it is determined that the battery B can be charged or discharged, the vehicle control unit C5 transmits a chargeable signal or a dischargeable signal to the control signal communication unit C4. At this time, the control signal communication unit C4 inputs an analog signal corresponding to the chargeable signal or the dischargeable signal to the fourth terminal T4. The chargeable signal and the dischargeable signal input to the fourth terminal T4 are logic high level signals. This chargeable signal or dischargeable signal is input to the communication module 33 via the analog line W4.

  When receiving the chargeable signal or the dischargeable signal via the analog line W4, the communication module 33 converts the received signal into a digital signal and transmits the digital signal to the main body 20 via the signal lines W11 and W12. The communication control part 22 of the main-body part 20 will transmit them to the charge / discharge control part 23, if a chargeable signal or a dischargeable signal is received via signal wire | line W11, W12. Thereby, the charge / discharge control part 23 can recognize that charge or discharge was permitted by the vehicle control part C5.

  When recognizing that charging or discharging is permitted by the vehicle control unit C5, the charge / discharge control unit 23 transmits a lock command signal for setting the lock circuit 32 to the locked state to the communication control unit 22. When receiving the lock command signal transmitted from the charge / discharge control unit 23, the communication control unit 22 transmits a digital signal corresponding to the lock command signal to the communication module 33 of the connector unit 31 via the signal lines W11 and W12.

  When receiving the lock command signal transmitted from the charge / discharge control unit 23, the communication module 33 supplies power to the lock circuit 32 to switch the lock circuit 32 from the unlocked state to the locked state. Thereby, removal of the connector part 31 from the inlet C1 is controlled.

  When the locking of the connector unit 31 is completed in this way, the communication module 33 inputs an analog signal corresponding to the confirmation signal indicating that the locking of the connector unit 31 is completed to the seventh terminal T7. This confirmation signal is a logic high level signal. The confirmation signal is received by the control signal communication unit C4 of the vehicle C, and a message to that effect is transmitted to the vehicle control unit C5. Thereby, vehicle control part C5 can recognize that connector part 31 was in a locked state.

  Thereafter, when charging of the battery B is started, the vehicle control unit C5 turns on the contactor C6 and then transmits a charge request signal for requesting charging to the control signal communication unit C4. The control signal communication unit C4 inputs an analog signal corresponding to the charge request signal to the tenth terminal T10. The charge request signal input to the tenth terminal T10 is a logic high level signal. This charge request signal is input to the communication module 33 via the analog line W10.

  When the communication module 33 receives the charge request signal via the analog line W10, the communication module 33 converts the received signal into a digital signal and transmits the digital signal to the main body 20 via the signal lines W11 and W12. The communication control part 22 of the main-body part 20 will transmit it to the charging / discharging control part 23, if a charge request signal is received via signal wire | line W11, W12. As a result, the charge / discharge control unit 23 starts charging the battery B from the power conversion unit 21.

  On the other hand, when starting to discharge the battery B, the charge / discharge control unit 23 transmits a discharge request signal to the vehicle control unit C5. Then, when the vehicle control unit C5 receives the discharge request signal, the contactor C6 is turned on. Thereby, the discharge of the battery B is started.

  Thereafter, the vehicle control unit C5 ends the charging or discharging of the battery B when the charging end condition or the discharge end condition is satisfied. Specifically, the vehicle control unit C5 turns the contactor C6 off. The charge termination condition is, for example, that the SOC value indicating the state of charge of the battery B becomes a predetermined value or more. The discharge termination condition is, for example, that the SOC value indicating the state of charge of the battery B is equal to or less than a predetermined value.

  After the contactor C6 is turned off in this way, the vehicle control unit C5 stops transmitting a chargeable signal or a dischargeable signal to the communication module 33. When the transmission of the chargeable signal or the dischargeable signal from the vehicle control unit C5 is stopped, the communication module 33 switches the signal input to the fourth terminal T4 from the logic high level to the logic low level. Similarly, the vehicle control unit C5 and the charge / discharge control unit 23 stop the transmission of the trigger signal and the transmission of the charge request signal or the discharge request signal. As a result, signals input to the second terminal T2, the fourth terminal T4, and the tenth terminal T10 are at a logic low level. The communication module 33 determines that charging or discharging of the battery B is completed based on the fact that the signals input to these terminals T2, T4, and T10 are at a logic low level, and releases the lock circuit 32 from the locked state. At the same time, the signal input to the seventh terminal T7 is set to a logic low level. Thereby, the connector part 31 can be removed from the inlet C1.

  According to the charging / discharging device 10 of the present embodiment described above, the operations and effects shown in the following (1) to (3) can be obtained.

  (1) Since communication between the connector unit 31 and the main body unit 20 is performed by digital communication, the signal used in communication between them is influenced by noise from the power lines W5 and W6 in the cable 30, It becomes difficult to be affected by the attenuation of the signal intensity due to the length of the cable 30. Therefore, the communication accuracy via the cable 30 can be improved.

  (2) The communication module 33 is supplied with electric power from the vehicle C or the main body 20. Thereby, the operating power of the communication module 33 can be secured easily.

  (3) The connector part 31 has a lock circuit 32 for locking the connector part 31 to the inlet C1 of the vehicle C. The communication module 33 controls the lock circuit 32 to lock and release the connector 31 from the inlet C1. Thereby, the lock | rock of the connector part 31 and the cancellation | release of a lock | rock can be performed reliably.

Second Embodiment
Next, a second embodiment of the charge / discharge device will be described. Hereinafter, it demonstrates centering around difference with the charging / discharging apparatus 10 of 1st Embodiment.

  As shown in FIG. 2, the communication control unit 22 of the main body unit 20 of this embodiment includes a wireless module 220. The wireless module 220 has a function of performing wireless communication using a digital signal with the communication module 33 of the connector unit 31. The communication module 33 of the connector unit 31 has a function of performing wireless communication with the wireless module 220 of the communication control unit 22.

  According to the charging / discharging device 10 of the present embodiment described above, the operation and effects shown in the following (4) can be further obtained.

  (4) Since the signal used in the wireless communication between the connector unit 31 and the main body unit 20 is less susceptible to noise from the power lines W5 and W6 in the cable 30, the communication accuracy via the cable 30 Can be further improved.

<Third Embodiment>
Next, a third embodiment of the charge / discharge device will be described. Hereinafter, it demonstrates centering around difference with the charging / discharging apparatus 10 of 1st Embodiment.

  As shown in FIG. 3, analog lines W2, W4, W7, and W10 are connected to the communication module 33 of this embodiment. The CAN communication lines W8 and W9 are not connected to the communication module 33 but are directly connected to the communication control unit 22 through the cable 30. That is, the communication control unit 22 is connected to the eighth terminal T8 and the ninth terminal T9 via the CAN communication lines W8 and W9. In the present embodiment, the CAN communication lines W8 and W9 correspond to network communication lines for performing data communication between the vehicle C and the main body unit 20.

  According to the charging / discharging device 10 of the present embodiment described above, the functions and effects shown in the following (5) can be obtained.

  (5) The communication module 33 uses a digital signal as a signal different from the signal received via the analog lines W2, W4, W7, W10, that is, the signal transmitted via the CAN communication lines W8, W9. Send to. This eliminates the need for the communication module 33 to process signals transmitted via the CAN communication lines W8 and W9, thereby reducing the processing load on the communication module 33.

<Fourth embodiment>
Next, a fourth embodiment of the charge / discharge device will be described. Hereinafter, it demonstrates centering around difference with the charging / discharging apparatus 10 of 1st Embodiment.

  As shown in FIG. 4, the communication module 33 of this embodiment includes a communication abnormality detection unit 330. The communication abnormality detection unit 330 detects an abnormality in digital communication performed with the communication control unit 22 via the signal lines W11 and W12. The communication abnormality detection unit 330 detects an abnormality in digital communication using an error detection method such as parity check or cyclic redundancy check (CRC). In the present embodiment, the communication abnormality detection unit 330 corresponds to a connector unit side communication abnormality detection unit.

  When the communication abnormality detection unit 330 detects an abnormality in digital communication, the communication module 33 transmits a communication abnormality detection signal to the communication control unit 22 of the main body unit 20 via the signal lines W11 and W12. Further, the communication module 33 transmits a communication abnormality detection signal to the CAN circuit C3 of the vehicle C via the CAN communication lines W8 and W9.

  Upon receiving the communication abnormality detection signal, the communication control unit 22 transmits this to the charge / discharge control unit 23. When receiving the communication abnormality detection signal, the charging / discharging control unit 23 stops the charging operation or discharging operation of the charging / discharging device 10 by, for example, stopping the power conversion unit 21.

  Moreover, the charge / discharge control part 23 is connected so that communication with the high-order ECU40 is possible. In the present embodiment, the host ECU 40 corresponds to an external device different from the main body unit 20. The host ECU 40 comprehensively manages the states of the plurality of charge / discharge devices 10. When the charge / discharge control unit 23 receives the communication abnormality detection signal, the charge / discharge control unit 23 transmits a notification to that effect to the host ECU 40. Accordingly, the host ECU 40 can recognize the communication abnormality of the charging / discharging device 10 and can therefore execute various fail-safe processes corresponding to the communication abnormality.

  On the other hand, when receiving the communication abnormality detection signal via the CAN circuit C3, the vehicle control unit C5 stops charging or discharging of the battery B by turning off the contactor C6, for example.

  According to the charging / discharging apparatus 10 of this embodiment demonstrated above, the effect | action and effect shown by the following (6)-(8) can be acquired.

  (6) The communication abnormality detection unit 330 can easily detect an abnormality in digital communication performed between the connector unit 31 and the main body unit 20.

  (7) The communication abnormality detection unit 330 transmits a communication abnormality detection signal to the main body unit 20 when a digital communication abnormality is detected. Thereby, the main-body part 20 can detect a communication abnormality easily.

  (8) The main body 20 stops the charging operation or the discharging operation when receiving the communication abnormality detection signal. Accordingly, it is possible to avoid the battery B from being continuously charged or discharged in a state where the communication abnormality has occurred, and thus it is possible to avoid the malfunction of the battery B and the main body unit 20 due to the communication abnormality.

(Modification)
Next, the modification of the charging / discharging apparatus 10 of 4th Embodiment is demonstrated.
As shown in FIG. 5, in the charging / discharging device 10 of this modification, the communication control unit 22 of the main body unit 20 includes a communication abnormality detection unit 221. In this modification, the communication abnormality detection unit 221 corresponds to the main body side communication abnormality detection unit. The communication abnormality detection unit 221 detects an abnormality in digital communication performed with the communication module 33 via the signal lines W11 and W12. When the communication abnormality detection unit 221 detects an abnormality in digital communication, the communication control unit 22 transmits a message to that effect to the charge / discharge control unit 23. When the charge / discharge control unit 23 receives the communication abnormality detection signal, the charge / discharge control unit 23 transmits a notification to that effect to the host ECU 40.

  Even if it is such a structure, the effect | action and effect according to the charging / discharging apparatus 10 of said 4th Embodiment can be acquired.

<Fifth Embodiment>
Next, a fifth embodiment of the charge / discharge device 10 will be described. Hereinafter, it demonstrates centering around difference with the charging / discharging apparatus 10 of 1st Embodiment.

  As shown in FIG. 6, the communication module 33 of this embodiment includes a current detection unit 34 for detecting a current flowing through the power supply line W6 and a voltage detection unit for detecting a voltage between the power supply lines W5 and W6. 35a, 35b. In addition, the communication module 33 includes a power measurement unit 331 and a power abnormality detection unit 332.

  The power measurement unit 331 multiplies the current detected through the current detection unit 34 and the voltage detected through the voltage detection units 35a and 35b, thereby charging power supplied from the main unit 20 to the battery B of the vehicle C. Alternatively, the discharge power discharged from the battery B of the vehicle C to the main body 20 is measured.

  The power abnormality detection unit 332 detects a power abnormality based on charging power or discharging power detected by the power measurement unit 331. The power abnormality detection unit 332 determines that an abnormality has occurred in the charging power, for example, when the charging power is equal to or higher than the charging threshold. The charging threshold is a value determined based on the maximum charging power of battery B. In addition, the power abnormality detection unit 332 determines that abnormality has occurred in the discharge power, for example, when the discharge power is equal to or greater than the discharge threshold. The discharge threshold is a value determined based on the maximum discharge power that can be accepted by the power conversion unit 21.

  The power abnormality detection unit 332 transmits a power abnormality detection signal to the communication control unit 22 of the main body unit 20 via the signal lines W11 and W12 when detecting abnormality of the charging power or discharging power. In addition, the communication module 33 transmits a power abnormality detection signal to the CAN circuit C3 of the vehicle C via the CAN communication lines W8 and W9.

  When the communication control unit 22 receives the power abnormality detection signal, the communication control unit 22 transmits the signal to the charge / discharge control unit 23. When the charge / discharge control unit 23 receives the power abnormality detection signal, the charge / discharge control unit 23 stops the charge operation or the discharge operation of the charge / discharge device 10 by, for example, stopping the power conversion unit 21.

  In addition, when the charge / discharge control unit 23 receives the power abnormality detection signal, the charge / discharge control unit 23 transmits the fact to the host ECU 40. As a result, the host ECU 40 can recognize the power abnormality of the charging / discharging device 10, and therefore can execute various fail-safe processes corresponding to the power abnormality.

  On the other hand, when receiving the power abnormality detection signal via the CAN circuit C3, the vehicle control unit C5 stops charging or discharging of the battery B by turning off the contactor C6, for example.

  According to the charging / discharging device 10 of the present embodiment described above, the operations and effects shown in the following (9) to (11) can be obtained.

  (9) The power abnormality detection unit 332 can easily detect abnormality in charging power or discharging power.

  (10) The power abnormality detection unit 332 transmits a power abnormality detection signal to the main body unit 20 when abnormality is detected in the digital communication. Thereby, the main-body part 20 can detect a power abnormality easily.

  (11) When receiving the power abnormality detection signal, the main body 20 stops the charging operation or the discharging operation. Thereby, since it is possible to avoid the battery B being continuously charged or discharged in a state where the power abnormality has occurred, damage to the battery B and the main body 20 due to the power abnormality can be avoided in advance.

<Other embodiments>
In addition, each embodiment can also be implemented with the following forms.
-Charging / discharging apparatus 10 of each embodiment may perform only any one of charge operation and discharge operation.

  -This invention is not limited to said specific example. That is, the above-described specific examples that are appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above, their arrangement, conditions, and the like are not limited to those illustrated, and can be changed as appropriate. Moreover, each element with which embodiment mentioned above is provided can be combined as long as it is technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

B: Battery C: Vehicle C1: Inlets T2, T4, T7, T10: Analog terminals W8, W9: CAN communication line (network communication line)
10: Charging / discharging device 20: Main unit 30: Cable 31: Connector unit 32: Lock circuit 33: Communication module (communication conversion unit)
40: Host ECU (external device)
221: Main unit side communication abnormality detection unit 330: Connector unit side communication abnormality detection unit 331: Power measurement unit 332: Power abnormality detection unit

Claims (15)

A connector part (31) attachable to the inlet (C1) of the vehicle (C);
A cable (30) having the connector part;
Charging operation for charging the vehicle battery (B) by supplying electric power to the vehicle via power lines (W5, W6) in the cable, and electric power discharged from the battery of the vehicle A main body (20) for performing at least one of discharge operations to be taken out through the power line in
An analog signal provided in the connector portion and input from the vehicle to the analog terminals (T2, T4, T7, T10) of the connector portion is converted into a digital signal and transmitted to the main body portion. A communication converter (33) for converting a digital signal to be transmitted into an analog signal and inputting the analog signal to the analog terminal of the connector;
A charge / discharge device comprising: The communication converter is
The charge / discharge device according to claim 1, wherein communication between the vehicle and the main body is performed by wireless communication. The cable includes
Network communication lines (W8, W9) are provided for mutual data communication between the vehicle and the main body,
The communication converter is
The charge / discharge device according to claim 1 or 2, wherein a signal different from a signal transmitted via the network communication line is transmitted to the main body part by digital communication. The communication converter is
The charge / discharge device according to claim 1, wherein electric power is supplied from the vehicle or the main body. The communication converter is
The charging / discharging device according to any one of claims 1 to 4, further comprising a connector unit side communication abnormality detecting unit (330) that detects an abnormality of digital communication performed between the connector unit and the main body unit. The connector side communication abnormality detection unit is
The charge / discharge device according to claim 5, wherein a communication abnormality detection signal is transmitted to the main body when an abnormality of the digital communication is detected. The main body is
The charging / discharging device according to claim 6, wherein the charging operation or the discharging operation is stopped when the communication abnormality detection signal is received. The communication converter is
The power measuring unit (331) for measuring charging power supplied from the main body part to the battery of the vehicle or discharging power discharged from the battery of the vehicle to the main body part. The charge / discharge device according to claim 1. The communication converter is
The charging / discharging device according to claim 8, further comprising a power abnormality detection unit (332) that detects abnormality based on the charging power or the discharging power detected by the power measurement unit. The power abnormality detector is
The charging / discharging device according to claim 9, wherein when an abnormality in the charging power or the discharging power is detected, a power abnormality detection signal is transmitted to the main body. The main body is
The charging / discharging device according to claim 10, wherein when the power abnormality detection signal is received, the charging operation or the discharging operation is stopped. The connector part is
A lock circuit (32) for locking the connector portion to the inlet of the vehicle;
The communication converter is
The charge / discharge device according to any one of claims 1 to 11, which controls locking of the connector portion to the inlet and release of the lock by the lock circuit. The main body is
The charge / discharge device according to any one of claims 1 to 12, further comprising a main body side communication abnormality detecting unit (221) that detects an abnormality of digital communication performed between the connector unit and the main body unit. The main body side communication abnormality detection unit is
The charging / discharging device according to claim 13, wherein when an abnormality of the digital communication is detected, a communication abnormality detection signal is transmitted to an external device (40) different from the main body. The main body is
The charge / discharge device according to claim 13 or 14, wherein when the digital communication abnormality is detected by the main body side communication abnormality detection unit, the charging operation or the discharging operation is stopped.

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