control device

Abstract

To provide a control device that can prevent a switch connecting an inlet and a battery in a DC charging circuit from being turned on during AC charging.SOLUTION: A control device 10 includes a PWC circuit 2 (first control circuit) that controls the on / off of a DCR 20 (switch) that connects an inlet 151 and a battery pack 152 (battery) in a DC charging circuit 100a, and an EV-ECU 4 (second control circuit) that controls the on / off of the DCR 20. Each of the PWC circuit 2 and the EV-ECU 4 determines whether AC charging or DC charging is to be performed, and operates to turn off the DCR 20 when it is determined that AC charging is to be performed.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] This disclosure relates to a control device.

Background Art

[0002] Japanese Patent Application Laid-Open No. 2022-039337 (Patent Document 1) discloses a vehicle including an AC port for receiving AC power, a DC port for receiving DC power, and a battery. A charging relay is provided between each of the AC port and the DC port and the battery.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Although not described in Patent Document 1 above, in a conventional charging system, it may be possible to receive AC power and DC power 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 source or the like, it is necessary to turn off a charging relay (switch) provided in the DC charging circuit during AC charging.

[0005] This disclosure has been made to solve the above problems, and an object thereof is to provide a control device capable of suppressing a switch that connects an inlet and a battery in a DC charging circuit from being turned on during AC charging.

Means for Solving the Problems

[0006] A control device according to one aspect of the present disclosure is a control device for controlling charging in an electrical device having a common inlet for both an AC charging circuit and a DC charging circuit for charging a battery, and comprises a first control circuit that controls the on / off state of a switch connecting the inlet and the battery in the DC charging circuit, and a second control circuit that controls the on / off state of the switch and is different from the first control circuit. Each of the first and second control circuits determines whether AC charging or DC charging is to be performed, and operates to turn off the switch if it is determined that AC charging is to be performed.

[0007] In a control device according to one aspect of this disclosure, as described above, each of the first control circuit and the second control circuit operates to turn off the switch when it determines that AC charging is to be performed. As a result, even if one of the first control circuit or the second control circuit operates to turn on the switch during AC charging, the operation of the other control circuit can suppress the switch from being turned on. Consequently, the switch being turned on during AC charging can be suppressed compared to the case where only one of the first control circuit or the second control circuit operates to turn off the switch during AC charging. Therefore, it is possible to suppress the switch connecting the inlet and the battery in the DC charging circuit from being turned on during AC charging.

[0008] In the control device relating to the first aspect described above, preferably, each of the first control circuit and the second control circuit uses first information based on the input voltage from an external power supply that supplies charging power to the battery to the inlet, and second information based on a signal from the external power supply, to determine whether AC charging or DC charging will be performed. With this configuration, the determination can be made using two pieces of information: first information based on the input voltage from the external power supply and second information based on a signal from the external power supply. As a result, the reliability of the determination can be improved compared to when the determination is made using only one of the two pieces of information.

[0009] In this case, preferably, the second information includes main information and sub-information, and the first control circuit uses the main information and sub-information to determine whether AC charging or DC charging will be performed, and determines whether AC charging or DC charging will be performed based on the determination result using the first information, the determination result using the main information, and the determination result using the sub-information. With this configuration, since two determination results, the main information and the sub-information, can be used, the reliability of determining whether AC charging or DC charging will be performed can be further improved compared to when only the main information is used.

[0010] The control device relating to the first aspect described above preferably includes a first switch control circuit that outputs a control signal to the switch to control the on / off state of the switch and receives operation commands from the first control circuit and the second control circuit, respectively. The switch is turned off when the control signal includes an off command. When the second control circuit determines that AC charging is to be performed, it outputs an operation command to the first switch control circuit so that the control signal includes an off command. With this configuration, the switch can be easily turned off by an operation command from the second control circuit.

[0011] In the control device relating to the first aspect described above, preferably, the first control circuit is configured to output a control signal to the switch that controls the on / off state of the switch. The switch is turned off when the control signal includes an off command. The first control circuit uses third information based on the input voltage from an external power source that supplies charging power to the battery to the inlet, and fourth information based on a signal from the external power source, to determine whether AC charging or DC charging will be performed. If it determines that AC charging will be performed, the control circuit operates to include an off command. With this configuration, the first control circuit, which outputs a control signal that controls the on / off state of the switch, can be made to determine whether AC charging or DC charging will be performed. As a result, unlike the case where a circuit other than the circuit that outputs the control signal that controls the on / off state of the switch performs the above determination, there is no need to transmit the determination result to the above circuit (the circuit that outputs the control signal). As a result, it is possible to suppress delays in the operation of the switch due to the time required to transmit the determination result (signal). This makes it possible to further suppress the switch from being turned on during AC charging. [Effects of the Invention]

[0012] According to this disclosure, it is possible to suppress the switch connecting the inlet and the battery in a DC charging circuit from being turned on during AC charging. [Brief explanation of the drawing]

[0013] [Figure 1] This is a diagram showing the configuration of a charging system for an electric vehicle according to the first embodiment. [Figure 2] This figure shows the configuration of the charging circuit for an electric vehicle according to the first embodiment. [Figure 3] This figure shows the configuration of the OBC drive circuit according to the first embodiment. [Figure 4] This figure shows the truth table of the AND circuit included in the OBC drive circuit according to the first embodiment. [Figure 5] This is a sequence diagram showing the control in the control device according to the first embodiment. [Figure 6]It is a diagram showing the configuration of a charging circuit of an electric vehicle according to the second embodiment. [Figure 7] It is a sequence diagram showing the control in the control device according to the second embodiment.

Embodiments for Carrying Out the Invention

[0014] 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 their descriptions are not repeated.

[0015] [First Embodiment] [Configuration of Charging System] FIG. 1 is a diagram showing a charging system for charging an electric vehicle 150 including a control device 10 according to the first embodiment. The system includes an electric vehicle 150, an EVSE (Electric Vehicle Supply Equipment) 300, and a power grid PG. Note that the electric vehicle 150 and the power grid PG are examples of the "electrical equipment" and "external power source" of the present disclosure, respectively.

[0016] The electric vehicle 150 includes a charging circuit 100, an inlet 151, and a battery pack 152. Note that the battery pack 152 is an example of the "battery" of the present disclosure.

[0017] Power for driving the electric vehicle 150 is stored in the battery pack 152. Charging power (alternating current power or direct current power) from an external power source such as the power grid PG is supplied to the battery pack 152. The charging power from the power grid PG is supplied to the battery pack 152 through the EVSE 300.

[0018] The EVSE 300 is provided with a charging cable 320 having a charging connector 310. The electric vehicle 150 is electrically connected to the EVSE 300 through the charging cable 320 when the charging connector 310 is connected to the inlet 151. As a result, the charging power from the power grid PG is supplied to the battery pack 152 through the EVSE 300 (charging cable 320).

[0019] The charging power from the power grid 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.

[0020] FIG. 2 is a diagram showing the configuration 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. Note that the DCR 20 is an example of the "switch" of the present disclosure.

[0021] The control device 10 includes an HLC (High Level Communication) circuit 1, a PWC (Pulse Width Controller) circuit 2, an OBC (On Board Charger) 3, and an EV-ECU (Electronic Control Unit) 4. Note that the PWC circuit 2 is an example of the "first control circuit" of the present disclosure. Also, 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.

[0022] Note that the EV-ECU 4 is a circuit different from (separately provided from) the PWC circuit 2. Details of the control device 10 will be described later.

[0023] The DCR 20 is provided in a DC charging circuit 100a (refer to the solid line arrow (thick line) in FIG. 2) for charging the battery pack 152. The DCR 20 connects the inlet 151 and the battery pack 152 in the DC charging circuit 100a. Specifically, the DCR 20 is provided between the end portion 41 on the inlet 151 side of the bypass path 40 and the SMR 30. Note that the DC charging circuit 100a is a circuit in which current flows in the order of inlet 151 - DCR 20 - SMR 30 - battery pack 152. The DCR 20 is a relay that is controlled to be turned on during DC charging and turned off during AC charging.

[0024] SMR30 is provided in both the AC charging circuit 100b (see dashed arrow (thick line) in Figure 2) and the DC charging circuit 100a for charging the battery pack 152. SMR30 connects the inlet 151 and the battery pack 152. Specifically, SMR30 is provided between the battery pack 152-side termination 42 of the bypass path 40 and the battery pack 152. The AC charging circuit 100b is a circuit in which current flows in the order of inlet 151-OBC3-SMR30-battery pack 152. SMR30 is a relay that is turned on during both DC charging and AC charging. The bypass path 40 is included in the AC charging circuit 100b. The bypass path 40 bypasses the DCR20.

[0025] As can be seen from the above explanation, in the electric vehicle 150, the inlet 151 is a common inlet for both the AC charging circuit 100b and the DC charging circuit 100a.

[0026] The voltage sensor 50 is located between the inlet 151 and the DCR 20. Specifically, the voltage sensor 50 detects the voltage between the inlet 151 and the termination 41. The voltage sensor 50 detects the input voltage from the power grid PG (EVSE 300) to the inlet 151. The information of the value detected by the voltage sensor 50 is transmitted to the OBC 3. The OBC 3 transmits the acquired information of the value detected by the voltage sensor 50 to the PWC circuit 2 and the EV-ECU 4 via communication. In the first embodiment, the information of the value detected by the voltage sensor 50 is an example of the "first information" in this disclosure.

[0027] The HLC circuit 1 acquires information about the power grid PG (hereinafter referred to as "system information") based on the signal from the power grid PG input to the inlet 151. The system information may include, for example, the upper limit, lower limit, rated value of the charging voltage of the power grid PG, and the AC frequency. The HLC circuit 1 transmits the acquired system information to the PWC circuit 2 and the EV-ECU 4, respectively. In the first embodiment, the system information is an example of the "second information" of this disclosure.

[0028] The PWC circuit 2 uses the acquired system information to determine whether AC charging or DC charging will be performed. Here, the system information includes primary information and monitoring information. The monitoring information contains information different from the primary information. The PWC circuit 2 uses the primary information and the monitoring information, respectively, to determine whether AC charging or DC charging will be performed. The determination result from the PWC circuit 2 based on the monitoring information is transmitted to the EV-ECU 4. Note that the monitoring information is an example of the "sub-information" in this disclosure.

[0029] PWC circuit 2 and EV-ECU4 each control the on / off state of DCR20. PWC circuit 2 and EV-ECU4 each determine whether AC charging or DC charging is performed. EV-ECU4 also controls the on / off state of SMR30.

[0030] Figure 3 shows a partial configuration of the drive circuit 3a included in the OBC3. The drive circuit 3a includes an AND circuit 3b. The AND circuit 3b outputs a control signal 3c to the DCR20 that controls the on / off state of the DCR20. The AND circuit 3b receives input from the internal wiring 3d of the drive circuit 3a and from the wiring 5 extending from the EV-ECU4. Wiring 3d, wiring 5, and the control signal 3c each transmit a digital signal with a logical value of "0" or "1".

[0031] Figure 4 shows the relationship between wiring 3d and wiring 5 and control signals 3c and DCR20. When the signals of wiring 3d and wiring 5 are H signals (signals with a logical value of "1"), control signal 3c becomes an H signal and DCR20 is turned on. When at least one of the signals of wiring 3d and wiring 5 is an L signal (signals with a logical value of "0"), control signal 3c becomes an L signal and DCR20 is turned off. Note that control signal 3c becoming an L signal is an example of "control signal including an OFF command" in this disclosure.

[0032] Here, in order to prevent the DC voltage of the battery from being applied to an external power source (power grid PG in this embodiment), it is necessary to turn off the charging relay provided in the DC charging circuit when AC charging is performed.

[0033] Therefore, in this embodiment, the PWC circuit 2 and the EV-ECU 4 each operate to turn off the DCR 20 when they determine that AC charging is to be performed. This ensures that the DCR 20 is turned off during AC charging by both the PWC circuit 2 and the EV-ECU 4. The details will be explained below with reference to Figure 3 again.

[0034] PWC circuit 2 outputs operation commands to OBC 3. Specifically, when PWC circuit 2 determines that AC charging is to be performed, it outputs an operation command to OBC 3 to set the signal on wiring 3d to a low signal. On the other hand, when PWC circuit 2 determines that DC charging is to be performed, it outputs an operation command to OBC 3 to set the signal on wiring 3d to a high signal.

[0035] When EV-ECU4 determines that AC charging is to be performed, it sets the signal on wiring 5 to a low (L) signal. When EV-ECU4 determines that DC charging is to be performed, it sets the signal on wiring 5 to a high (H) signal. Wiring 5, when set to a high (H) or low (L) signal, is an example of an "operation command from the second control circuit" as described in this disclosure.

[0036] <Control device sequence> Figure 5 is a sequence diagram showing the control by the HLC circuit 1, PWC circuit 2, OBC 3, and EV-ECU 4. The sequence shown in Figure 5 may be executed at predetermined intervals (for example, every 10 minutes).

[0037] In step S1, the HLC circuit 1 acquires the above system information (main information + monitoring information). The above system information is input to the HLC circuit 1 through the inlet 151 (see Figure 2).

[0038] In step S2, the HLC circuit 1 transmits the system information (main information + monitoring information) acquired in step S1 to the PWC circuit 2 and the EV-ECU 4, respectively. Note that the main information does not necessarily need to be transmitted to the EV-ECU 4.

[0039] In step S11, the OBC3 acquires information on the voltage value detected by the voltage sensor 50 (hereinafter referred to as voltage value information).

[0040] In step S12, the OBC3 transmits the voltage value information acquired in step S11 to the PWC circuit 2 and the EV-ECU 4, respectively.

[0041] In step S21, the PWC circuit 2 uses the system information (main information) received from the HLC circuit 1 to determine whether AC charging or DC charging will be performed (charging mode).

[0042] In step S21a, the PWC circuit 2 transmits the determination result from step S21 to the EV-ECU 4.

[0043] In step S22, the PWC circuit 2 determines whether the determination results of the charging mode using the system information (monitoring information), voltage value information, and system information (main information) are the same. If the charging mode determined in the PWC circuit 2 based on the monitoring information, the charging mode determined in the PWC circuit 2 based on the voltage value information, and the charging mode determined in the PWC circuit 2 based on the main information (determination results in S21) are the same (Yes in S22), the process proceeds to step S23. If the above three determination results (determined charging modes) are not the same (No in S22), the process proceeds to step S24. The monitoring information and voltage value information are information used to confirm (monitor) that the main information is correct.

[0044] In step S23, the PWC circuit 2 determines whether the charging mode indicated in step S22 (the charging mode determined based on the above information) is AC charging. If it is AC charging (Yes in S23), it is determined that AC charging will be performed, and the process proceeds to step S24. If it is not AC charging (No in S23), it is determined that DC charging will be performed, and the process proceeds to step S25.

[0045] In step S24, the PWC circuit 2 sends an operation command to the OBC 3 so that the wiring 3d of the OBC 3's drive circuit 3a becomes an L signal. After that, the processing of the PWC circuit 2 is completed.

[0046] In step S25, the PWC circuit 2 sends an operation command to the OBC 3 so that wiring 3d becomes a high signal. After that, the processing of the PWC circuit 2 is completed.

[0047] In step S13, OBC3 fixes wiring 3d to either an H signal or an L signal based on the operation command in step S24 or S25. Specifically, if OBC3 receives the operation command in step S24, it fixes wiring 3d to an L signal. If OBC3 receives the operation command in step S25, it fixes wiring 3d to an H signal. Next, the process proceeds to step S14.

[0048] In step S31, the EV-ECU4 determines whether AC charging or DC charging will be performed, using the determination result using system information (monitoring information), the determination result using voltage value information, and the determination result in step S21. If the charging mode determined by the EV-ECU4 based on the monitoring information, the charging mode determined by the EV-ECU4 based on the voltage value information, and the charging mode determined in step S21 are the same (Yes in S31), the process proceeds to step S32. If the above three determination results (determined charging modes) are not the same (No in S31), the process proceeds to step S35.

[0049] In step S32, the EV-ECU4 determines whether the charging mode determined in step S31 based on the information is AC charging. If it is AC charging (Yes in S32), it is determined that AC charging will be performed, and the process proceeds to step S33. If it is not AC charging (No in S32), it is determined that DC charging will be performed, and the process proceeds to step S34.

[0050] In step S33, the EV-ECU4 fixes the wire 5 input to the AND circuit 3b of the OBC3 to an L signal. In step S34, the EV-ECU4 fixes the wire 5 to an H signal.

[0051] In step S35, the EV-ECU4 determines whether it has received a request from the PWC circuit 2 to set wiring 5 to a high signal. If the request has been received (Yes in S35), the process proceeds to step S36. If the request has not been received (No in S35), the process proceeds to step S33. Note that the process in step S35 is optional.

[0052] In step S36, the EV-ECU4 rejects the request received in step S35. After that, the processing of the EV-ECU4 ends.

[0053] In step S14, OBC3 turns DCR20 on or off by control signal 3c based on wiring 3d and wiring 5.

[0054] As described above, in the first embodiment, each of the PWC circuit 2 and the EV-ECU 4 determines whether AC charging or DC charging will be performed, and operates to turn off the DCR20 if it is determined that AC charging will be performed. This makes it possible to prevent the DCR20 from being turned on during AC charging even if the determination of one of the PWC circuit 2 or the EV-ECU 4 is abnormal, based on the determination of the other PWC circuit 2 or the EV-ECU 4.

[0055] Furthermore, in the first embodiment, the PWC circuit 2 and the EV-ECU 4 each use voltage value information and system information to determine whether AC charging or DC charging will be performed. This prevents incorrect determination of whether AC charging or DC charging will be performed based on the other voltage value information or system information, even if one of the voltage value information or system information is abnormal.

[0056] [Second Embodiment] Next, the control device 110 according to the second embodiment will be described with reference to Figures 6 and 7. In the second embodiment, unlike the first embodiment in which the PWC circuit 2 determines whether AC charging or DC charging is performed, the OBC 13 makes the determination. Components identical to those in the first embodiment are denoted by the same reference numerals and will not be described repeatedly.

[0057] <System Configuration> Figure 6 shows a charging circuit 200 including a control device 110 according to the second embodiment. The charging circuit 200 differs from the charging circuit 100 of the first embodiment in that it includes a control device 110 instead of a control device 10.

[0058] The control device 110 includes an HLC circuit 11, a PWC circuit 12, an OBC 13, and an EV-ECU 4. The OBC 13 is an example of the "first control circuit" in this disclosure.

[0059] The OBC13 includes a microcontroller unit (Micro Controller Unit) 13a and a microcontroller unit 13b. Microcontroller 13a uses information (voltage value information) of the input voltage from the power grid PG to the inlet 151 to determine whether AC charging or DC charging will be performed. Microcontroller 13b uses grid information (main information) to determine whether AC charging or DC charging will be performed. In the second embodiment, the voltage value information is an example of the "third information" of this disclosure. Also, in the second embodiment, the grid information (main information) is an example of the "fourth information" of this disclosure.

[0060] <Control device sequence> Figure 7 is a sequence diagram showing the control by the HLC circuit 11, PWC circuit 12, OBC 13, and EV-ECU 4. The sequence shown in Figure 7 may be executed at predetermined intervals (for example, every 10 minutes). Steps that are the same as those in the first embodiment described above are denoted by the same reference numerals and will not be described repeatedly.

[0061] In step S52, the HLC circuit 11 transmits the system information (main information + monitoring information) acquired in step S1 to the PWC circuit 12, the OBC 13, and the EV-ECU 4, respectively. Note that the main information does not necessarily have to be transmitted to the OBC 13 and the EV-ECU 4. The monitoring information does not necessarily have to be transmitted to the PWC circuit 12.

[0062] In step S21b, the PWC circuit 12 transmits the determination result from step S21 to the OBC 13 and the EV-ECU 4, respectively.

[0063] In step S42, the OBC13 transmits the voltage value information acquired in step S11 to the EV-ECU4.

[0064] In step S43, the OBC 13 uses the voltage value information, system information (monitoring information), and the determination result of the charging mode by the PWC circuit 12 to determine whether AC charging or DC charging will be performed. Specifically, the OBC 13 uses the determination result by the microcontroller 13a (determination result based on voltage value information), the determination result by the microcontroller 13b (determination result based on monitoring information of system information), and the determination result by the PWC circuit 12 to determine the charging mode. If the charging mode determined by the OBC 13 based on the voltage value information, the charging mode determined by the OBC 13 based on monitoring information of system information, and the charging mode indicated by the determination result in step S21 are the same (Yes in S43), the process proceeds to step S44. If the charging modes indicated by the above three determination results are not the same (No in S43), the process proceeds to step S45.

[0065] In step S44, the OBC13 determines whether the charging mode indicated in step S43 (the charging mode determined based on the information) is AC charging. If it is AC charging (Yes in S44), it is determined that AC charging will be performed, and the process proceeds to step S45. If it is not AC charging (No in S44), it is determined that DC charging will be performed, and the process proceeds to step S46.

[0066] In step S45, the OBC13 controls the drive circuit 3a so that the wiring 3d (see Figure 3) of the drive circuit 3a of the OBC13 becomes an L signal. Next, the process proceeds to step S14.

[0067] In step S46, the OBC13 controls the drive circuit 3a so that the wiring 3d becomes a high signal. Next, the process proceeds to step S14.

[0068] Furthermore, the other configurations and controls are the same as those of the first embodiment described above, so no repeated explanation will be given.

[0069] The first and second embodiments described above illustrate examples in which each of two distinct circuits determines whether AC charging or DC charging is performed, but the disclosure is not limited thereto. Three or more distinct circuits may each determine whether AC charging or DC charging is performed.

[0070] In the first and second embodiments described above, examples were shown in which AC charging and DC charging are determined using voltage value information and system information, but the disclosure is not limited thereto. The determination may also be made using information other than the two above (for example, current value, temperature information, and charging speed information).

[0071] In the first and second embodiments described above, an example was shown in which an AND circuit 3b is provided in the drive circuit 3a of OBC3(13), but the disclosure is not limited thereto. The configuration of the drive circuit 3a is not limited to the above example. For example, an OR circuit or the like may output a control signal to control the DCR20.

[0072] In the first embodiment described above, the PWC circuit 2 was shown to determine whether AC charging or DC charging is performed using voltage value information, system information (monitoring information), and system information (main information), but the disclosure is not limited to this. The PWC circuit may make the determination using one or two of the three pieces of information. The PWC circuit may also make the determination using four or more pieces of information, which are the three pieces of information plus other information. The determinations in the OBC 13 of the second embodiment and in the EV-ECU 4 of the first and second embodiments may be the same as described above.

[0073] In the first and second embodiments described above, examples were shown in which the charging circuit 100(200) is electrically connected to a power grid PG, but the disclosure is not limited thereto. The charging circuit 100(200) may be electrically connected to, for example, a household appliance. In this case, the appliance is an example of an "external power source" in the disclosure.

[0074] In the first and second embodiments described above, examples were shown in which the control device 10 (110) is mounted on an electric vehicle 150, but the disclosure is not limited thereto. The control device may be mounted on electrical equipment other than an electric vehicle (for example, a stationary energy storage device).

[0075] In the first and second embodiments described above, examples were shown in which voltage value information is transmitted to the EV-ECU4 and PWC circuit 2 via OBC3(13), but the disclosure is not limited thereto. For example, voltage value information may be transmitted from the voltage sensor 50 to the EV-ECU4 and PWC circuit 2, respectively.

[0076] Furthermore, the control of the above embodiments and the various modifications described above may be performed in combination with each other.

[0077] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of this disclosure is indicated by the claims rather than by the description of the embodiments above, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of symbols]

[0078] 2 PWC circuit (first control circuit), 3 OBC (first switch control circuit), 3c control signal, 4 EV-ECU (second control circuit), 10, 110 control device, 13 OBC (first control circuit), 20 DCR (switch), 100a DC charging circuit, 100b AC charging circuit, 150 electric vehicle (electrical equipment), 151 inlet, 152 battery pack (battery), PG power system (external power supply).

Claims

1. A control device for controlling charging in an electrical device in which the AC charging circuit and DC charging circuit inlets for charging a battery are common, The DC charging circuit includes a first control circuit that controls the on / off state of a switch connecting the inlet and the battery, The system includes a second control circuit that controls the on / off state of the switch and is different from the first control circuit, Each of the first control circuit and the second control circuit is: Determine whether AC charging or DC charging will be performed. When it is determined that AC charging is to be performed, the switch is turned off. Each of the first and second control circuits is a control device that determines whether AC charging or DC charging is performed, using first information based on the input voltage from an external power source that supplies charging power to the battery to the inlet, and second information based on a signal from the external power source.

2. The second information includes primary information and secondary information, The first control circuit is, Using the main information and the sub-information, it is determined whether AC charging or DC charging will be performed. The control device according to claim 1, which determines whether AC charging or DC charging is performed based on the determination result using the first information, the determination result using the main information, and the determination result using the sub-information.

3. A control device for controlling charging in an electrical device in which the inlets of an AC charging circuit and a DC charging circuit for charging a battery are common, The DC charging circuit includes a first control circuit that controls the on / off state of a switch connecting the inlet and the battery, A second control circuit, which controls the on / off state of the switch and is different from the first control circuit, The system includes a first switch control circuit that outputs a control signal to the switch to control the on / off state of the switch, and receives operation commands from the first control circuit and the second control circuit, respectively. Each of the first control circuit and the second control circuit is: Determine whether AC charging or DC charging will be performed. When it is determined that AC charging is to be performed, the switch is turned off. The switch is turned off when the control signal includes an off command. The second control circuit is a control device that, when it determines that AC charging is to be performed, outputs the operation command to the first switch control circuit such that the control signal includes the off command.

4. A control device for controlling charging in an electrical device in which the inlets of an AC charging circuit and a DC charging circuit for charging a battery are common, The DC charging circuit includes a first control circuit that controls the on / off state of a switch connecting the inlet and the battery, The system includes a second control circuit that controls the on / off state of the switch and is different from the first control circuit, Each of the first control circuit and the second control circuit is: Determine whether AC charging or DC charging will be performed. When it is determined that AC charging is to be performed, the switch is turned off. The first control circuit is configured to output a control signal to the switch that controls the on / off state of the switch. The switch is turned off when the control signal includes an off command. The first control circuit is, Using third information based on the input voltage from the external power supply that supplies charging power to the battery to the inlet, and fourth information based on the signal from the external power supply, it is determined whether AC charging or DC charging will be performed. A control device that, when it is determined that AC charging is to be performed, operates such that the control signal includes the OFF command.

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