Control device

Abstract

The invention relates to a control device. A control device is provided with: a PWC circuit (first control circuit) that controls the ON / OFF of a DCR (switch) that connects an inlet and a battery pack (battery) in a DC charging circuit; and an EV-ECU (second control circuit) that controls the ON and OFF of the DCR. The PWC circuit and the EV-ECU each determine which of AC charging and DC charging is to be performed, and operate so as to turn off the DCR when it is determined that AC charging is to be performed.

Description

Technical Field

[0001] The present disclosure relates to a control device. Background Art

[0002] A vehicle having an AC port for receiving alternating current, a DC port for receiving direct current, and a battery is disclosed in Japanese Unexamined Patent Application Publication No. 2022-039337. Charging relays are provided between the AC port and the DC port and the battery, respectively.

[0003] Although not described in Japanese Unexamined Patent Application Publication No. 2022-039337, in a conventional charging system, there is a case where alternating current and direct current can be received through a common port (inlet). In this case, in order to prevent the DC voltage of the battery from being applied to an AC power supply or the like, during AC charging, it is necessary to disconnect the charging relay (switch) provided in the DC charging circuit. Summary of the Invention

[0004] The present disclosure has been made to solve the above problems, and an object thereof is to provide a control device that can suppress a switch that connects an inlet and a battery in a DC charging circuit from being turned on during AC charging.

[0005] A control device according to an aspect of the present disclosure controls charging in an electrical device in which inlets of an AC charging circuit and a DC charging circuit for charging a battery are shared. The control device includes: a first control circuit that controls turning on and off of a switch that connects an inlet and a battery in the DC charging circuit; and a second control circuit that controls turning on and off of the switch and is different from the first control circuit.

[0006] The first control circuit and the second control circuit respectively determine which of AC charging and DC charging is to be performed, and when it is determined that AC charging is to be performed, they operate in such a way as to turn off the switch.

[0007] In the control device according to an aspect of the present disclosure, as described above, the first control circuit and the second control circuit respectively operate in such a way as to turn off the switch when it is determined that AC charging is to be performed. Thus, even if one of the first control circuit and the second control circuit operates in such a way as to turn on the switch during AC charging, the switch can be prevented from being turned on by the operation of the other of the first control circuit and the second control circuit. As a result, compared with the case where only one of the first control circuit and the second control circuit operates in such a way as to turn off the switch during AC charging, the switch can be prevented from being turned on during AC charging. Therefore, it is possible to suppress a switch that connects an inlet and a battery in a DC charging circuit from being turned on during AC charging.

[0008] In the control device according to the above aspect, preferably, the first control circuit and the second control circuit respectively use first information based on an input voltage input to an inlet from an external power source that supplies charging power to the battery and second information based on a signal from the external power source to determine which one of AC charging and DC charging to execute.

[0009] If configured in this way, it is possible to make a determination using two pieces of information, that is, the first information based on the input voltage from the external power source and the second information based on the signal from the external power source. As a result, compared with the case where the above determination is made using only one of the above two pieces of information, the reliability of the above determination can be improved.

[0010] In this case, preferably, the second information includes main information and sub-information. The first control circuit respectively uses the main information and the sub-information to determine which one of AC charging and DC charging to execute, and based on the determination result using the first information, the determination result using the main information, and the determination result using the sub-information, determines which one of AC charging and DC charging to execute.

[0011] If configured in this way, it is possible to use two determination results of the main information and the sub-information. Therefore, compared with the case where only the main information is used, the reliability in the determination of which one of AC charging and DC charging to execute can be further improved.

[0012] The control device according to the above aspect preferably includes a first switch control circuit. The first switch control circuit outputs a control signal for controlling the on and off of a switch to the switch and receives operation instructions from the first control circuit and the second control circuit respectively. The switch is turned off when the control signal includes a turn-off instruction. When the second control circuit determines that AC charging is to be executed, it outputs an operation instruction to the first switch control circuit in such a way that the control signal includes a turn-off instruction. If configured in this way, the switch can be easily turned off according to the operation instruction from the second control circuit.

[0013] In the control device according to the above aspect, preferably, the first control circuit is configured to output a control signal for controlling the on and off of a switch to the switch. The switch is turned off when the control signal includes a turn-off instruction.

[0014] The first control circuit uses third information based on an input voltage input to an inlet from an external power source that supplies charging power to the battery and fourth information based on a signal from the external power source to determine which one of AC charging and DC charging to execute. When it determines that AC charging is to be executed, it operates in such a way that the control signal includes a turn-off instruction.

[0015] If configured in this way, the first control circuit that outputs a control signal for controlling the on and off of the switch can determine which of AC charging and DC charging to perform. As a result, different from the case where the determination is made by a circuit different from the circuit that outputs the control signal for controlling the on and off of the switch, it is not necessary to send the determination result to the above circuit (the circuit that outputs the control signal). As a result, it is possible to suppress the driving delay of the switch due to the time required for sending the determination result (signal). Thereby, it is possible to further suppress the switch from being turned on during AC charging.

[0016] According to the present disclosure, it is possible to suppress the switch that connects the inlet and the battery in the DC charging circuit from being turned on during AC charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Hereinafter, the features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described with reference to the drawings, in which like reference numerals denote like elements, wherein:

[0018] Figure 1 is a diagram showing the structure of a charging system of an electric vehicle according to the first embodiment;

[0019] Figure 2 is a diagram showing the structure of a charging circuit of an electric vehicle according to the first embodiment;

[0020] Figure 3 is a diagram showing the structure of a driving circuit of an OBC according to the first embodiment;

[0021] Figure 4 is a diagram showing the truth table of a logic circuit included in the driving circuit of the OBC according to the first embodiment;

[0022] Figure 5 is a timing chart showing the control in the control device according to the first embodiment;

[0023] Figure 6 is a diagram showing the structure of a charging circuit of an electric vehicle according to the second embodiment;

[0024] Figure 7 is a timing chart showing the control in the control device according to the second embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and will not be described repeatedly.

[0026] [First Embodiment]

[0027] <Structure of Charging System>

[0028] Figure 1 This is a diagram showing a charging system for charging an electric vehicle 150 equipped with the control device 10 of the first embodiment. The above system includes an electric vehicle 150, an EVSE (Electric Vehicle Supply Equipment) 300, and a power system PG. It should be noted that the electric vehicle 150 and the power system PG are examples of the "electrical equipment" and "external power source" of the present disclosure, respectively.

[0029] The electric vehicle 150 includes a charging circuit 100, an inlet 151, and a battery pack 152. It should be noted that the battery pack 152 is an example of the "battery" of the present disclosure.

[0030] Electric power for driving the electric vehicle 150 is stored in the battery pack 152. Charging power (alternating current or direct current) from an external power source such as the power system PG is supplied to the battery pack 152. The charging power from the power system PG is supplied to the battery pack 152 through the EVSE 300.

[0031] The EVSE 300 has a charging cable 320 provided with a charging connector 310. By connecting the charging connector 310 to the inlet 151, the electric vehicle 150 is electrically connected to the EVSE 300 through the charging cable 320. As a result, the charging power from the power system PG is supplied to the battery pack 152 through the EVSE 300 (charging cable 320).

[0032] The charging power from the power system PG input to the inlet 151 is supplied to the battery pack 152 through the charging circuit 100. The charging circuit 100 includes a control device 10. The control device 10 controls the charging of the battery pack 152.

[0033] Figure 2 This is a diagram showing the structure of the charging circuit 100. The charging circuit 100 includes a control device 10, a DCR (Direct Current Relay) 20, an SMR (System Main Relay) 30, a bypass path 40, and a voltage sensor 50. It should be noted that the DCR 20 is an example of the "switch" of the present disclosure.

[0034] The control device 10 includes an HLC (High Level Communication) circuit 1, a PWC (PulseWidth Controller) circuit 2, an OBC (On Board Charger) 3, and an EV-ECU (Electronic Control Unit) 4. It should be noted that the PWC circuit 2 is an example of the "first control circuit" of the present disclosure. In addition, the OBC 3 and the EV-ECU 4 are examples of the "first switch control circuit" and the "second control circuit" of the present disclosure, respectively.

[0035] It should be noted that the EV-ECU 4 is a circuit different from (separately provided from) the PWC circuit 2. The details of the control device 10 will be described later.

[0036] The DCR20 is provided in the DC charging circuit 100a (refer to the solid arrow (thick line) in Figure 2 ) for charging the battery pack 152. The DCR20 connects the inlet 151 and the battery pack 152 in the DC charging circuit 100a. Specifically, the DCR20 is provided between the terminal portion 41 on the inlet 151 side of the bypass path 40 and the SMR30. It should be noted that the DC charging circuit 100a is a circuit in which current flows in the order of inlet 151 - DCR20 - SMR30 - battery pack 152. The DCR20 is a relay that is controlled to be turned on during DC charging and turned off during AC charging.

[0037] The SMR30 is provided in the AC charging circuit 100b (refer to the dashed arrow (thick line) in Figure 2 ) and the DC charging circuit 100a for charging the battery pack 152. The SMR30 connects the inlet 151 and the battery pack 152. Specifically, the SMR30 is provided between the terminal portion 42 on the battery pack 152 side of the bypass path 40 and the battery pack 152. It should be noted that the AC charging circuit 100b is a circuit in which current flows in the order of inlet 151 - OBC3 - SMR30 - battery pack 152. The SMR30 is a relay that is turned on during DC charging and during AC charging, respectively. It should be noted that the bypass path 40 is included in the AC charging circuit 100b. The bypass path 40 bypasses the DCR20.

[0038] As can be seen from the above description, in the electric vehicle 150, the inlet 151 is an inlet shared by the AC charging circuit 100b and the DC charging circuit 100a.

[0039] The voltage sensor 50 is provided between the inlet 151 and the DCR 20. Specifically, the voltage sensor 50 detects the voltage between the inlet 151 and the terminal portion 41. The voltage sensor 50 detects the input voltage input from the power system PG (EVSE 300) to the inlet 151. Information on the detected value of the voltage sensor 50 is sent to the OBC 3. The OBC 3 sends the information on the detected value of the voltage sensor 50 obtained through communication to the PWC circuit 2 and the EV-ECU 4 respectively. It should be noted that, in the first embodiment, the information on the detected value of the voltage sensor 50 is an example of the "first information" of the present disclosure.

[0040] The HLC circuit 1 obtains information on the power system PG (hereinafter referred to as system information) based on the signal from the power system PG input to the inlet 151. The system information may include, for example, the upper limit value, lower limit value, rated value, and AC frequency of the charging voltage of the power system PG. The HLC circuit 1 sends the obtained system information to the PWC circuit 2 and the EV-ECU 4 respectively. It should be noted that, in the first embodiment, the above system information is an example of the "second information" of the present disclosure.

[0041] The PWC circuit 2 uses the obtained system information to determine which of AC charging and DC charging to execute. Here, the system information includes main information and monitoring information. The monitoring information includes information different from the main information. The PWC circuit 2 uses the main information and the monitoring information respectively to determine which of AC charging and DC charging to execute. The determination result based on the monitoring information made by the PWC circuit 2 is sent to the EV-ECU 4. It should be noted that the monitoring information is an example of the "sub-information" of the present disclosure.

[0042] The PWC circuit 2 and the EV-ECU 4 respectively control the on and off of the DCR 20. The PWC circuit 2 and the EV-ECU 4 respectively determine which of AC charging and DC charging to execute. It should be noted that the EV-ECU 4 also controls the on and off of the SMR 30.

[0043] Figure 3 It is a diagram showing a partial structure of the drive circuit 3a included in the OBC 3. The drive circuit 3a includes an AND circuit 3b. The AND circuit 3b outputs a control signal 3c for controlling the on and off of the DCR 20 to the DCR 20. It should be noted that the wiring 3d inside the drive circuit 3a and the wiring 5 extending from the EV-ECU 4 are input to the AND circuit 3b. It should be noted that the wiring 3d, the wiring 5, and the control signal 3c respectively transmit digital signals with a logical value of "0" or "1".

[0044] Figure 4This is a diagram showing the relationship between wiring 3d and wiring 5 and control signals 3c and DCR20. When the signals of wiring 3d and wiring 5 are both H signals (signals with a logical value of "1"), control signal 3c becomes an H signal and DCR20 is turned on. When the signal of at least one of wiring 3d and wiring 5 is an L signal (a signal with a logical value of "0"), control signal 3c becomes an L signal and DCR20 is turned off. It should be noted that the control signal 3c becoming an L signal is an example of "the control signal includes a disconnection instruction" in the present disclosure.

[0045] Here, in order to prevent the DC voltage of the battery from being applied to the external power supply (the power system PG in this embodiment), it is necessary to disconnect the charging relay provided in the DC charging circuit during AC charging.

[0046] Therefore, in this embodiment, when the PWC circuit 2 and the EV-ECU 4 respectively determine that AC charging is to be performed, they operate in such a way as to turn off DCR20. Thus, it is ensured by both the PWC circuit 2 and the EV-ECU 4 that DCR20 is turned off during AC charging. Hereinafter, refer to again Figure 3 Specifically, it will be described.

[0047] The PWC circuit 2 outputs an operation instruction to the OBC 3. Specifically, when the PWC circuit 2 determines that AC charging is to be performed, it outputs an operation instruction to make the signal of wiring 3d an L signal to the OBC 3. On the other hand, when the PWC circuit 2 determines that DC charging is to be performed, it outputs an operation instruction to make the signal of wiring 3d an H signal to the OBC 3.

[0048] When the EV-ECU 4 determines that AC charging is to be performed, it makes the signal of wiring 5 an L signal. When the EV-ECU 4 determines that DC charging is to be performed, it makes the signal of wiring 5 an H signal. It should be noted that wiring 5 that becomes an H signal or an L signal is an example of "the operation instruction from the second control circuit" in the present disclosure.

[0049] <Sequence of the control device>

[0050] Figure 5 This is a timing diagram showing the control performed by the HLC circuit 1, the PWC circuit 2, the OBC 3, and the EV-ECU 4. Figure 5 The sequence shown can also be executed at regular intervals (for example, every 10 minutes).

[0051] In S1, the HLC circuit 1 acquires the above system information (main information + monitoring information). The above system information is input into the HLC circuit 1 through the inlet 151 (refer to Figure 2 )

[0052] In S2, the HLC circuit 1 sends the system information (main information + monitoring information) obtained in S1 to the PWC circuit 2 and the EV-ECU 4 respectively. It should be noted that the main information may not be sent to the EV-ECU 4.

[0053] In S11, the OBC 3 obtains the information of the voltage value detected by the voltage sensor 50 (hereinafter referred to as voltage value information).

[0054] In S12, the OBC 3 sends the voltage value information obtained in S11 to the PWC circuit 2 and the EV-ECU 4 respectively.

[0055] In S21, the PWC circuit 2 uses the system information (main information) received from the HLC circuit 1 to determine which one of AC charging and DC charging to execute (charging mode).

[0056] In S21a, the PWC circuit 2 sends the determination result in S21 to the EV-ECU 4.

[0057] In S22, the PWC circuit 2 determines whether the determination results of the charging modes that respectively use the system information (monitoring information), the voltage value information, and the system information (main information) are the same. When the charging mode determined based on the monitoring information in the PWC circuit 2, the charging mode determined based on the voltage value information in the PWC circuit 2, and the charging mode determined based on the main information (the determination result of S21) in the PWC circuit 2 are the same (yes in S22), the process proceeds to S23. When the above three determination results (determined charging modes) are different (no in S22), the process proceeds to S24. The monitoring information and the voltage value information are respectively information for confirming (monitoring) the correctness of the main information.

[0058] In S23, the PWC circuit 2 determines whether the charging mode indicated in S22 (the charging mode determined based on the above various information) is AC charging. If it is AC charging (yes in S23), it is determined to execute AC charging, and the process proceeds to S24. If it is not AC charging (no in S23), it is determined to execute DC charging, and the process proceeds to S25.

[0059] In S24, the PWC circuit 2 sends an operation instruction to the OBC 3 to make the wiring 3d of the drive circuit 3a of the OBC 3 an L signal. After that, the processing of the PWC circuit 2 ends.

[0060] In S25, the PWC circuit 2 sends an operation instruction to the OBC 3 to make the wiring 3d an H signal. After that, the processing of the PWC circuit 2 ends.

[0061] In S13, based on the action instruction of S24 or S25, OBC3 fixes the wiring 3d as an H signal or an L signal. Specifically, when OBC3 receives the action instruction of S24, it fixes the wiring 3d as an L signal. When OBC3 receives the action instruction of S25, it fixes the wiring 3d as an H signal. Then, the process proceeds to S14.

[0062] In S31, EV-ECU4 determines which of AC charging and DC charging to execute by using the determination result using system information (monitoring information), the determination result using voltage value information, and the determination result in S21. When the charging mode determined based on the monitoring information in EV-ECU4, the charging mode determined based on the voltage value information in EV-ECU4, and the charging mode determined in S21 are the same (Yes in S31), the process proceeds to S32. When the above three determination results (determined charging modes) are different (No in S31), the process proceeds to S35.

[0063] In S32, EV-ECU4 determines whether the charging mode determined based on each piece of information in S31 is AC charging. If it is AC charging (Yes in S32), it is determined to execute AC charging, and the process proceeds to S33. If it is not AC charging (No in S32), it is determined to execute DC charging, and the process proceeds to S34.

[0064] In S33, EV-ECU4 fixes the wiring 5 of the AND circuit 3b input to OBC3 as an L signal. In S34, EV-ECU4 fixes the wiring 5 as an H signal.

[0065] In S35, EV-ECU4 determines whether a request to make the wiring 5 an H signal is received from the PWC circuit 2. If the above request is received (Yes in S35), the process proceeds to S36. If the above request is not received (No in S35), the process proceeds to S33. It should be noted that the process of S35 may not be executed.

[0066] In S36, EV-ECU4 rejects the request received in S35. After that, the process of EV-ECU4 ends.

[0067] In S14, OBC3 turns DCR20 on or off according to the control signal 3c based on the wiring 3d and the wiring 5.

[0068] As described above, in the first embodiment, the PWC circuit 2 and the EV-ECU 4 respectively determine which one of AC charging and DC charging is to be performed. When it is determined that AC charging is to be performed, the operation is performed in such a way that the DCR 20 is turned off. Thus, even if the determination of one of the PWC circuit 2 and the EV-ECU 4 is abnormal, it is possible to suppress the DCR 20 from being turned on during AC charging based on the determination of the other one of the PWC circuit 2 and the EV-ECU 4.

[0069] In addition, in the first embodiment, the PWC circuit 2 and the EV-ECU 4 respectively use the voltage value information and the system information to determine which one of AC charging and DC charging is to be performed. Thus, even if one of the voltage value information and the system information is abnormal, it is possible to suppress an incorrect determination of which one of AC charging and DC charging is to be performed based on the other one of the voltage value information and the system information.

[0070] [Second Embodiment]

[0071] Next, with reference to Figure 6 and Figure 7 , the control device 110 of the second embodiment will be described. In the second embodiment, different from the first embodiment in which the PWC circuit 2 determines which one of AC charging and DC charging is to be performed, the above determination is made in the OBC 13. For the same structures as those in the first embodiment, the same reference numerals are assigned and repeated descriptions are not given.

[0072] <Structure of the System>

[0073] Figure 6 is a diagram showing the charging circuit 200 including the control device 110 of the second embodiment. The charging circuit 200 is different from the charging circuit 100 of the first embodiment in that the control device 10 is replaced with the control device 110.

[0074] The control device 110 includes an HLC circuit 11, a PWC circuit 12, an OBC 13, and an EV-ECU 4. It should be noted that the OBC 13 is an example of the "first control circuit" of the present disclosure.

[0075] The OBC 13 has a microcontroller (Micro Controller Unit) 13a and a microcontroller 13b. The microcontroller 13a determines which of the AC charging and the DC charging is to be performed by using the information (voltage value information) of the input voltage input from the power system PG to the inlet 151. The microcontroller 13b determines which of the AC charging and the DC charging is to be performed by using the system information (main information). It should be noted that, in the second embodiment, the voltage value information is an example of the "third information" of the present disclosure. Further, in the second embodiment, the above-mentioned system information (main information) is an example of the "fourth information" of the present disclosure.

[0076] <Sequence of the control device>

[0077] Figure 7 It is a timing chart showing the control performed by the HLC circuit 11, the PWC circuit 12, the OBC 13, and the EV-ECU 4. Figure 7 The sequence shown can also be executed at every prescribed period (for example, every 10 minutes). It should be noted that, for the processes and steps that are the same as those in the first embodiment above, the same reference numerals are given, and repeated descriptions are not provided.

[0078] In S52, the HLC circuit 11 sends the system information (main information + monitoring information) obtained in S1 to the PWC circuit 12, the OBC 13, and the EV-ECU 4 respectively. It should be noted that the main information may not be sent to each of the OBC 13 and the EV-ECU 4. The monitoring information may not be sent to the PWC circuit 12.

[0079] In S21b, the PWC circuit 12 sends the determination result of S21 to the OBC 13 and the EV-ECU 4 respectively.

[0080] In S42, the OBC 13 sends the voltage value information obtained in S11 to the EV-ECU 4.

[0081] In S43, the OBC 13 determines which one of AC charging and DC charging to execute, using the voltage value information, system information (monitoring information), and the determination result based on the charging mode of the PWC circuit 12. Specifically, the OBC 13 determines the charging mode using the determination result of the microcomputer 13a (the determination result based on the voltage value information), the determination result of the microcomputer 13b (the determination result based on the system information of the monitoring information), and the determination result of the PWC circuit 12. When the charging mode determined based on the voltage value information in the OBC 13, the charging mode determined based on the system information of the monitoring information in the OBC 13, and the charging mode indicated by the determination result of S21 are the same (Yes in S43), the process proceeds to S44. When the charging modes indicated by the above three determination results are different (No in S43), the process proceeds to S45.

[0082] In S44, the OBC 13 determines whether the charging mode indicated in S43 (the charging mode determined based on each information) is AC charging. When it is AC charging (Yes in S44), it is determined to execute AC charging, and the process proceeds to S45. When it is not AC charging (No in S44), it is determined to execute DC charging, and the process proceeds to S46.

[0083] In S45, the OBC 13 controls the drive circuit 3a so that the wiring 3d (refer to Figure 3 ) of the drive circuit 3a of the OBC 13 becomes an L signal. Then, the process proceeds to S14.

[0084] In S46, the OBC 13 controls the drive circuit 3a so that the wiring 3d becomes an H signal. Then, the process proceeds to S14.

[0085] Note that regarding other structures and controls, since they are the same as those in the above first embodiment, repeated descriptions will not be given.

[0086] In the above first and second embodiments, examples are shown in which two different circuits respectively determine which one of AC charging and DC charging to execute, but the present disclosure is not limited to this. It may also be that three or more different circuits respectively determine which one of AC charging and DC charging to execute.

[0087] In the above first and second embodiments, examples are shown in which voltage value information and system information are used to determine which one of AC charging and DC charging to execute, but the present disclosure is not limited to this. Information other than the above two pieces of information (for example, current value, temperature information, and charging speed, etc.) may also be used for determination.

[0088] In the above-described first and second embodiments, an example is shown in which the drive circuit 3a of the OBC3 (13) is provided with the circuit 3b, but the present disclosure is not limited thereto. The structure of the drive circuit 3a is not limited to the above example. For example, an OR circuit or the like may also output a control signal for controlling the DCR20.

[0089] In the above-described first embodiment, an example is shown in which the PWC circuit 2 determines which of AC charging and DC charging to perform using voltage value information, system information (monitoring information), and system information (main information), but the present disclosure is not limited thereto. The PWC circuit may also perform the above determination using one or two of the above three pieces of information. Additionally, the PWC circuit may also perform the above determination using four or more pieces of information including the above three pieces of information plus other information. It should be noted that the determinations of the OBC13 in the above-described second embodiment and the EV-ECU4 in the above-described first and second embodiments may also be the same as the above.

[0090] In the above-described first and second embodiments, an example is shown in which the charging circuit 100 (200) is electrically connected to the power system PG, but the present disclosure is not limited thereto. The charging circuit 100 (200) may also be electrically connected to, for example, a household electrical appliance. In this case, the above-described household electrical appliance is an example of the "external power source" of the present disclosure.

[0091] In the above-described first and second embodiments, an example is shown in which the control device 10 (110) is mounted on the electric vehicle 150, but the present disclosure is not limited thereto. The control device may also be mounted on an electrical device other than an electric vehicle (for example, a stationary energy storage device).

[0092] In the above-described first and second embodiments, an example is shown in which the voltage value information is sent to the EV-ECU4 and the PWC circuit 2 through the OBC3 (13), but the present disclosure is not limited thereto. For example, the voltage value information may also be sent from the voltage sensor 50 to the EV-ECU4 and the PWC circuit 2 respectively.

[0093] It should be noted that the controls of the above-described embodiments and the above various modifications may also be executed in combination with each other.

[0094] The embodiments disclosed herein should be understood to be illustrative in all respects and not restrictive. The scope of the present disclosure is not represented by the description of the above embodiments, but by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

Claims

1. A control device for controlling charging in an electrical device, in which an AC charging circuit and a DC charging circuit for charging a battery are shared by an inlet, wherein: The control device comprises: a first control circuit that controls turning on and off a switch that connects the inlet and the battery in the DC charging circuit; as well as a second control circuit, the second control circuit controls the on and off of the switch and is different from the first control circuit, The first control circuit and the second control circuit each determine whether AC charging or DC charging is to be performed, and when it is determined that AC charging is to be performed, operate to turn off the switch.

2. The control device according to claim 1, wherein: The first control circuit and the second control circuit determine which of AC charging and DC charging to perform using first information based on an input voltage input to the inlet from an external power supply supplying charging power to the battery and second information based on a signal from the external power supply, respectively.

3. The control device according to claim 2, wherein: The second information includes main information and sub-information, The first control circuit determines which of AC charging and DC charging to perform using the main information and the sub-information, respectively, and determines which of AC charging and DC charging to perform based on a determination result using the first information, a determination result using the main information, and a determination result using the sub-information.

4. The control device according to any one of claims 1 to 3, wherein: The control device further includes a first switch control circuit, the first switch control circuit outputting a control signal to the switch for controlling the switch to be turned on and off, and receiving operation instructions from the first control circuit and the second control circuit, respectively. The switch is disconnected when the control signal includes a disconnection instruction, When determining that AC charging is to be performed, the second control circuit outputs the operation instruction to the first switch control circuit so that the opening instruction is included in the control signal.

5. The control device according to any one of claims 1 to 3, wherein: The first control circuit is configured to output a control signal to the switch for controlling the switch to be turned on and off. The switch is disconnected when the control signal includes a disconnection instruction, The first control circuit determines whether to perform AC charging or DC charging using third information based on an input voltage input to the inlet from an external power source that supplies charging power to the battery and fourth information based on a signal from the external power source, and when it is determined that AC charging is to be performed, operates in a manner that includes the disconnection instruction in the control signal.

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