Signal output circuit

Abstract

This eliminates the need to modify the circuitry based on the charging specifications. [Solution] The solution includes: a first terminal connected to the PP terminal or CC terminal of a charging connector; a voltage output circuit electrically connected to the first terminal, which outputs different voltages to a first node depending on whether the charging connector is connected to an electric vehicle or not, based on a first control signal; a reference voltage output circuit which outputs a reference voltage to a second node between the voltage at the first node when the charging connector is connected to an electric vehicle and the voltage at the first node when the charging connector is not connected to an electric vehicle, based on a second control signal; and a comparator which outputs a first-level comparison result signal from the output terminal when the voltage at the first input terminal is lower than the voltage at the second input terminal, and outputs a second-level comparison result signal from the output terminal when the voltage at the first input terminal is higher than the voltage at the second input terminal.

Description

Technical Field

[0001] This disclosure relates to a signal output circuit.

Background Art

[0002] An electric vehicle (e.g., an electric two-wheeler) must not run when a charging connector (charging gun) of charging equipment is connected to an inlet of the vehicle body. Therefore, an electric vehicle requires a signal output circuit that outputs a running inhibition signal for suppressing the running of the electric vehicle to an ECU (Electronic Control Unit) when the charging connector is connected to the inlet.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, if the signal output circuit is modified according to the charging specifications, the number of part numbers will increase, evaluation man-hours will increase, and as a result, costs will rise.

[0007] This disclosure aims to eliminate the need to modify the circuitry based on the charging specifications. [Means for solving the problem]

[0008] One aspect of the signal output circuit of this disclosure is: A signal output circuit installed in an electric vehicle with Type 1 (SAE J1772), Type 2 (IEC 62196), or GB / T (GB / T 20234) charging specifications, which outputs a driving suppression signal to suppress the driving of the electric vehicle, A first terminal is electrically connected to the PP (Proximity Pilot) terminal of a Type 1 or Type 2 charging connector, or to the CC (Charging Confirmation) terminal of a GB / T charging connector. A second terminal that outputs the aforementioned driving suppression signal, A third terminal receives a first control signal which is at a first level when the electric vehicle's charging specification is Type 1, and at a second level when the electric vehicle's charging specification is Type 2 or GB / T. A fourth terminal receives a second control signal, which is at a first level when the electric vehicle's charging specification is Type 1 or Type 2, and at a second level when the electric vehicle's charging specification is GB / T. A voltage output circuit electrically connected to the first terminal, which outputs different voltages to the first node depending on whether the charging connector is connected to the electric vehicle or not, based on the first control signal, A reference voltage output circuit outputs to the second node a reference voltage between the voltage at the first node when the charging connector is connected to the electric vehicle and the voltage at the first node when the charging connector is not connected to the electric vehicle, based on the second control signal. A comparator or operational amplifier having a first input terminal electrically connected to the first node, a second input terminal electrically connected to the second node, outputting a first-level comparison result signal from the output terminal when the voltage at the first input terminal is lower than the voltage at the second input terminal, and outputting a second-level comparison result signal from the output terminal when the voltage at the first input terminal is higher than the voltage at the second input terminal, Includes, The driving suppression signal based on the comparison result signal is output from the second terminal. It is characterized by the following:

[0009] In the aforementioned signal output circuit, The aforementioned voltage output circuit is A first resistor, one end of which is electrically connected to the power supply potential and the other end of which is electrically connected to the first node and the first terminal, A second resistor and a first switch are electrically connected in series between the first node and the first terminal and the reference potential, Includes, The first switch described above is The first control signal is turned on when it is at a first level, and turned off when it is at a second level. It is characterized by the following:

[0010] In the aforementioned signal output circuit, The aforementioned reference voltage output circuit is When the second control signal is at the first level, a first reference voltage is output to the second node that is lower than the voltage at the first node when a Type 1 or Type 2 charging connector is not connected to the electric vehicle, and higher than the voltage at the first node when a Type 1 or Type 2 charging connector is connected to the electric vehicle. When the second control signal is at the second level, a second reference voltage is output to the second node that is lower than the voltage at the first node when a GB / T charging connector is not connected to the electric vehicle, and higher than the voltage at the first node when a GB / T charging connector is connected to the electric vehicle. It is characterized by the following:

[0011] In the signal output circuit, the reference voltage output circuit includes a third resistor having one end electrically connected to the power supply potential and the other end electrically connected to the second node, a fourth resistor having one end electrically connected to the second node and the other end electrically connected to the reference potential, a fifth resistor and a second switch electrically connected in series between the second node and the reference potential, and includes the second switch is turned on when the second control signal is at the first level and turned off when the second control signal is at the second level, which is characterized in that.

Advantages of the Invention

[0012] According to the present disclosure, it is possible to eliminate the need to change the circuit according to the charging specification.

Brief Description of the Drawings

[0013] [Figure 1] FIG. 1 is a diagram showing an electric vehicle including a signal output circuit according to an embodiment, and a charging connector (charging gun) connected to the electric vehicle. [Figure 2] FIG. 2 is a diagram showing the relationship between the charging specification of the electric vehicle and the first control signal and the second control signal. [Figure 3] FIG. 3 is a diagram showing the configuration of the resistance circuit. [Figure 4] FIG. 4 is a diagram showing the configuration of the resistance circuit. [Figure 5] FIG. 5 is a diagram showing the configuration of the resistance circuit. [Figure 6] FIG. 6 is a diagram showing the operation of the signal output circuit according to the embodiment.

Embodiments for Carrying Out the Invention

[0014] Embodiments relating to this disclosure will be described in detail below with reference to the attached drawings. However, this embodiment does not limit the disclosure, and in the following embodiments, the same parts are denoted by the same reference numerals to avoid redundant explanations.

[0015] <Embodiment> (composition) Figure 1 shows an electric vehicle including a signal output circuit of an embodiment, and a charging connector (charging gun) connected to the electric vehicle.

[0016] The electric vehicle 1 includes an inlet 11, a signal output circuit 12, and an ECU (Electronic Control Unit) 13.

[0017] While electric vehicle 1 is exemplified as an electric two-wheeled vehicle, this disclosure is not limited thereto. While signal output circuit 12 is exemplified as part of an AC charger mounted on electric vehicle 1, this disclosure is not limited thereto.

[0018] The charging specifications for electric vehicle 1 are predetermined according to the destination of electric vehicle 1. For example, in Japan and the United States, the charging specifications for electric vehicle 1 are predetermined to be Type 1 (SAE J1772), in Europe, they are predetermined to be Type 2 (IEC 62196), and in the People's Republic of China, they are predetermined to be GB / T (GB / T 20234).

[0019] The ECU13 has a pre-configured charging specification for the electric vehicle 1 (one of Type 1, Type 2, and GB / T). The ECU13 outputs a first control signal S1 and a second control signal S2 to the signal output circuit 12 according to the pre-configured charging specification. It is exemplified that the ECU13 outputs the first control signal S1 and the second control signal S2 to the signal output circuit 12 using CAN (Controller Area Network).

[0020] The signal output circuit 12 outputs a driving suppression signal S21 according to the first control signal S1 and the second control signal S2, and the state of connection or disconnection of the charging connector 101 to the inlet 11.

[0021] In this embodiment, the ECU 13 may operate the electric vehicle 1 when the driving suppression signal S21 is at a high level. On the other hand, the ECU 13 may not operate the electric vehicle 1 when the driving suppression signal S21 is at a low level. However, this disclosure is not limited thereto. The signal output circuit 12 may logically invert the driving suppression signal S21, so that the ECU 13 may operate the electric vehicle 1 when the driving suppression signal S21 is at a high level, and not operate the electric vehicle 1 when the driving suppression signal S21 is at a low level. This can be achieved, for example, by electrically connecting the non-inverting input terminal of the comparator 23 to the first node N1 and the inverting input terminal of the comparator 23 to the second node N2, but this disclosure is not limited thereto.

[0022] Figure 2 shows the relationship between the electric vehicle's charging specifications and the first and second control signals.

[0023] The first row 201 of Table 200 shows the levels of the first control signal S1 and the second control signal S2 that the ECU 13 outputs to the signal output circuit 12 when the charging specification of the electric vehicle 1 is Type 1. When the charging specification of the electric vehicle 1 is Type 1, the ECU 13 outputs a high-level first control signal S1 and a high-level second control signal S2 to the signal output circuit 12.

[0024] Row 202 of Table 200 shows the levels of the first control signal S1 and the second control signal S2 that the ECU 13 outputs to the signal output circuit 12 when the charging specification of the electric vehicle 1 is Type 2. When the charging specification of the electric vehicle 1 is Type 2, the ECU 13 outputs a low-level first control signal S1 and a high-level second control signal S2 to the signal output circuit 12.

[0025] Row 203 of Table 200 shows the levels of the first control signal S1 and the second control signal S2 that the ECU 13 outputs to the signal output circuit 12 when the charging specification of the electric vehicle 1 is GB / T. When the charging specification of the electric vehicle 1 is GB / T, the ECU 13 outputs a low-level first control signal S1 and a low-level second control signal S2 to the signal output circuit 12.

[0026] Referring again to Figure 1, the inlet 11 has a shape corresponding to the charging specifications of the electric vehicle 1. A charging connector 101 corresponding to the charging specifications of the electric vehicle 1 is connected to the inlet 11.

[0027] In other words, inlet 11 is a Type 1 inlet if the charging specification of electric vehicle 1 is Type 1, a Type 2 inlet if the charging specification of electric vehicle 1 is Type 2, and a GB / T inlet if the charging specification of electric vehicle 1 is GB / T.

[0028] Furthermore, the charging connector 101 is a Type 1 charging connector if the charging specification of the electric vehicle 1 is Type 1, a Type 2 charging connector if the charging specification of the electric vehicle 1 is Type 2, and a GB / T charging connector if the charging specification of the electric vehicle 1 is GB / T.

[0029] The charging connector 101 includes a resistor circuit 102 and terminals 103.

[0030] Terminal 103 is a PP (Proximity Pilot) terminal if the charging connector 101 is a Type 1 or Type 2 charging connector. Terminal 103 is a CC (Charging Confirmation) terminal if the charging connector 101 is a GB / T charging connector.

[0031] Figures 3 to 5 show the configuration of the resistor circuits. Specifically, Figure 3 shows the configuration of resistor circuit 102-1 when the charging connector 101 is a Type 1 charging connector. Figure 4 shows the configuration of resistor circuit 102-2 when the charging connector 101 is a Type 2 charging connector. Figure 5 shows the configuration of resistor circuit 102-3 when the charging connector 101 is a GB / T charging connector.

[0032] Referring to Figure 3, the resistor circuit 102-1 includes resistor 111, resistor 112, and switch 113.

[0033] One end of resistor 111 is electrically connected to terminal 103 (PP terminal). The other end of resistor 111 is electrically connected to one end of resistor 112 and one end of switch 113. The other end of resistor 112 and the other end of switch 113 are electrically connected to a reference potential.

[0034] The resistance value of resistor 111 is exemplified as 150 ohms. The resistance value of resistor 112 is exemplified as 330 ohms.

[0035] Switch 113 is linked to the locking mechanism (release button) of the charging connector 101. Switch 113 turns on when the charging connector 101 is locked (not released). Switch 113 turns off when the charging connector 101 is not locked (released).

[0036] When switch 113 is ON, the resistance of resistor circuit 102-1 is 150Ω. When switch 113 is OFF, the resistance of resistor circuit 102-1 is 150Ω + 330Ω = 480Ω.

[0037] Referring to Figure 4, the resistor circuit 102-2 includes resistor 121.

[0038] One end of resistor 121 is electrically connected to terminal 103 (PP terminal). The other end of resistor 121 is electrically connected to a reference potential.

[0039] The resistance value of resistor 121 is exemplified to range from 100Ω to 1.5kΩ (kiloohms).

[0040] Referring to Figure 5, the resistor circuit 102-3 includes resistor 131, resistor 132, and switch 133.

[0041] One end of resistor 131 is electrically connected to terminal 103 (CC terminal). The other end of resistor 131 is electrically connected to one end of resistor 132 and one end of switch 133. The other end of resistor 132 and the other end of switch 133 are electrically connected to a reference potential.

[0042] The resistance value of resistor 131 is exemplified as 220Ω. The resistance value of resistor 132 is exemplified as 3.3kΩ.

[0043] Switch 133 is linked to the locking mechanism (release button) of the charging connector 101. Switch 133 turns on when the charging connector 101 is locked (not released). Switch 133 turns off when the charging connector 101 is not locked (released).

[0044] When switch 133 is ON, the resistance of resistor circuit 102-3 is 220Ω. When switch 133 is OFF, the resistance of resistor circuit 102-3 is 220Ω + 3.3kΩ = 3.52kΩ.

[0045] Referring again to Figure 1, the signal output circuit 12 includes a first terminal 12a, a second terminal 12b, a third terminal 12c, a fourth terminal 12d, a voltage output circuit 21, a reference voltage output circuit 22, a comparator 23, and a transmission circuit 24.

[0046] In this embodiment, the signal output circuit 12 includes a comparator 23, but this disclosure is not limited thereto. The signal output circuit 12 may also include an operational amplifier instead of the comparator 23.

[0047] The first terminal 12a is electrically connected to terminal 103 when the charging connector 101 is connected to the inlet 11. The first terminal 12a is open when the charging connector 101 is not connected to the inlet 11. The first terminal 12a is electrically connected to the first node N1.

[0048] A driving suppression signal S21 is output from the second terminal 12b.

[0049] The third terminal 12c receives the first control signal S1.

[0050] The second control signal S2 is input to the fourth terminal 12d.

[0051] The voltage output circuit 21 includes a resistor 31, a resistor 32, and a first switch 33.

[0052] Resistor 31 corresponds to an example of the “first resistor” in this disclosure. Resistor 32 corresponds to an example of the “second resistor” in this disclosure.

[0053] One end of resistor 31 is electrically connected to the power supply voltage Vcc. The other end of resistor 31 is electrically connected to the first node N1. The first node N1 is electrically connected to the first terminal 12a.

[0054] The power supply voltage Vcc is exemplified as 5V (volts).

[0055] One end of resistor 32 is electrically connected to the first node N1. The other end of resistor 32 is electrically connected to one end of the first switch 33.

[0056] The resistance value of resistor 31 is exemplified as 330Ω. The resistance value of resistor 32 is exemplified as 2.7kΩ.

[0057] The other end of the first switch 33 is electrically connected to a reference potential. The control terminal of the first switch 33 is electrically connected to the third terminal 12c, and the first control signal S1 is input to it.

[0058] The first switch 33 is turned ON when the first control signal S1 is at a high level, and turned OFF when the first control signal S1 is at a low level.

[0059] Note that the resistor 32 and the first switch 33 may be swapped. That is, one end of the first switch 33 may be electrically connected to the first node N1, the other end of the first switch 33 may be electrically connected to one end of the resistor 32, and the other end of the resistor 32 may be electrically connected to the reference potential.

[0060] When the charging connector 101 is connected to the inlet 11 and the first control signal S1 is at a high level, the resistor 31 and the parallel connection circuit of resistors 102 and 32 are connected in series. In other words, the voltage at the first node N1 is the voltage divided by the resistor 31 and the parallel connection circuit of resistors 102 and 32.

[0061] When the charging connector 101 is connected to the inlet 11 and the first control signal S1 is at a low level, the resistor 31 and the resistor circuit 102 are connected in series. In other words, the voltage at the first node N1 is the voltage divided by the resistor 31 and the resistor circuit 102.

[0062] If the charging connector 101 is not connected to the inlet 11 and the first control signal S1 is at a high level, resistors 31 and 32 are connected in series. In other words, the voltage at the first node N1 is the voltage divided by resistors 31 and 32.

[0063] If the charging connector 101 is not connected to the inlet 11 and the first control signal S1 is at a low level, the first node N1 is pulled up by the resistor 31, and the voltage at the first node N1 becomes the power supply voltage Vcc.

[0064] The reference voltage output circuit 22 includes resistors 41 to 43 and a second switch 44.

[0065] Resistor 41 corresponds to an example of the “third resistor” in this disclosure. Resistor 42 corresponds to an example of the “fourth resistor” in this disclosure. Resistor 43 corresponds to an example of the “fifth resistor” in this disclosure.

[0066] One end of resistor 41 is electrically connected to the power supply voltage Vcc. The other end of resistor 41 is electrically connected to the second node N2.

[0067] One end of resistor 42 is electrically connected to the second node N2. The other end of resistor 42 is electrically connected to the reference potential.

[0068] One end of resistor 43 is electrically connected to the second node N2. The other end of resistor 43 is electrically connected to one end of the second switch 44.

[0069] The resistance value of resistor 41 is exemplified as 3.3kΩ. The resistance value of resistor 42 is exemplified as 68kΩ. The resistance value of resistor 43 is exemplified as 27kΩ.

[0070] The other end of the second switch 44 is electrically connected to the reference potential. The control terminal of the second switch 44 is electrically connected to the fourth terminal 12d, and the second control signal S2 is input to it.

[0071] The second switch 44 is turned ON when the second control signal S2 is at a high level, and turned OFF when the second control signal S2 is at a low level.

[0072] Note that the resistor 43 and the second switch 44 may be swapped. That is, one end of the second switch 44 may be electrically connected to the second node N2, the other end of the second switch 44 may be electrically connected to one end of the resistor 43, and the other end of the resistor 43 may be electrically connected to the reference potential.

[0073] When the second control signal S2 is at a high level, resistor 41 and the parallel connection circuit of resistors 42 and 43 are connected in series. In other words, the voltage at the second node N2 is the voltage divided by resistor 41 and the parallel connection circuit of resistors 42 and 43. The resistance value of the parallel connection circuit of resistors 42 and 43 is 68kΩ × 27kΩ / (68kΩ + 27kΩ) = 19.3kΩ. Therefore, the voltage at the second node N2 is 5V × (19.3kΩ / (3.3kΩ + 19.3kΩ)) = 4.27V.

[0074] When the second control signal S2 is at a low level, resistors 41 and 42 are connected in series. In other words, the voltage at the second node N2 is the voltage divided by resistors 41 and 42. Therefore, the voltage at the second node N2 is 5V × (68kΩ / (3.3kΩ + 68kΩ)) = 4.76V.

[0075] In summary, the reference voltage output circuit 22 outputs 4.27V as the first reference voltage to the second node N2 when the second control signal S2 is high level (when the charging specification is Type 1 or Type 2), and outputs 4.76V as the second reference voltage to the second node N2 when the second control signal S2 is low level (when the charging specification is GB / T).

[0076] The inverting input terminal (- terminal) of comparator 23 is electrically connected to the first node N1. The non-inverting input terminal (+ terminal) of comparator 23 is electrically connected to the second node N2. Comparator 23 compares the voltage at the first node N1 with the voltage at the second node N2 and outputs a comparison result signal S11.

[0077] The transmission circuit 24 logically inverts the comparison result signal S11 and outputs the driving suppression signal S21 to the ECU 13. However, the disclosure is not limited thereto. The transmission circuit 24 may also output the comparison result signal S11 as is, or convert the voltage level of the comparison result signal S11.

[0078] (operation) The operation of the signal output circuit 12 will be explained in the following cases. [A] If the charging specification is Type 1 and the charging connector is not connected [B] When the charging specification is Type 1 and the charging connector is connected. [C] If the charging specification is Type 2 and the charging connector is not connected [D] When the charging specification is Type 2 and the charging connector is connected. [E] If the charging specification is GB / T and the charging connector is not connected. [F] When the charging specification is GB / T and the charging connector is connected.

[0079] Figure 6 is a diagram showing the operation of the signal output circuit of the embodiment. The first row 301 of Table 300 shows the operation of the signal output circuit 12 in the case of [A]. The second row 302 of Table 300 shows the operation of the signal output circuit 12 in the case of [B]. The third row 303 of Table 300 shows the operation of the signal output circuit 12 in the case of [C]. The fourth row 304 of Table 300 shows the operation of the signal output circuit 12 in the case of [D]. The fifth row 305 of Table 300 shows the operation of the signal output circuit 12 in the case of [E]. The sixth row 306 of Table 300 shows the operation of the signal output circuit 12 in the case of [F].

[0080] In case [A], as described above, the reference voltage output circuit 22 outputs 4.27V as the first reference voltage to the second node N2.

[0081] In the case of [A], the voltage at the first node N1 is the voltage divided by resistor 31 and resistor 32. Therefore, the voltage at the first node N1 is 5V × (2.7kΩ / (330Ω + 2.7kΩ)) = 4.45V.

[0082] Therefore, in case [A], the comparator 23 outputs a low-level comparison result signal S11. In other words, the signal output circuit 12 outputs a high-level driving suppression signal S21.

[0083] As a result, ECU13 can operate the electric vehicle 1 in case [A] (when the charging connector 101 is not connected) (OK).

[0084] In case [B], as described above, the reference voltage output circuit 22 outputs 4.27V as the first reference voltage to the second node N2.

[0085] In the case of [B], the voltage at the first node N1 is maximum when switch 113 is off. That is, the voltage at the first node N1 is the voltage divided by resistor 31 and the parallel connection of resistor circuit 102-1 and resistor 32. When switch 113 is off, the resistance of resistor circuit 102-1 is 150Ω + 330Ω = 480Ω. The resistance of the parallel connection of resistor circuit 102-1 and resistor 32 is 480Ω × 2.7kΩ / (480Ω + 2.7kΩ) = 407Ω. Therefore, the voltage at the first node N1 is 5V × (407Ω / (330Ω + 407Ω)) = 2.76V.

[0086] Therefore, in case [B], the comparator 23 outputs a high-level comparison result signal S11. In other words, the signal output circuit 12 outputs a low-level driving suppression signal S21.

[0087] As a result, ECU13 cannot drive electric vehicle 1 in case [B] (when the charging connector 101 is connected) (Judgment OK).

[0088] In case [C], as described above, the reference voltage output circuit 22 outputs 4.27V as the first reference voltage to the second node N2.

[0089] In addition, in the case of [C], the voltage at the first node N1 will be 5V.

[0090] Therefore, in case [C], the comparator 23 outputs a low-level comparison result signal S11. In other words, the signal output circuit 12 outputs a high-level driving suppression signal S21.

[0091] As a result, ECU13 can operate the electric vehicle 1 in case [C] (when the charging connector 101 is not connected) (OK).

[0092] In case [D], as described above, the reference voltage output circuit 22 outputs 4.27V as the first reference voltage to the second node N2.

[0093] In the case of [D], the voltage at the first node N1 is the voltage divided by resistor 31 and resistor 121. The voltage at the first node N1 is maximum when the resistance value of resistor 121 is maximum (1.5kΩ). Therefore, the maximum value of the voltage at the first node N1 is 5V × (1.5kΩ / (330Ω + 1.5kΩ)) = 4.10V.

[0094] Therefore, in the case of [D], the comparator 23 outputs a high-level comparison result signal S11. In other words, the signal output circuit 12 outputs a low-level driving suppression signal S21.

[0095] As a result, ECU13 cannot drive the electric vehicle 1 in the case of [D] (when the charging connector 101 is connected) (Judgment OK).

[0096] In case [E], as described above, the reference voltage output circuit 22 outputs 4.76V as the second reference voltage to the second node N2.

[0097] Also, in the case of [E], the voltage at the first node N1 will be 5V.

[0098] Therefore, in the case of [E], the comparator 23 outputs a low-level comparison result signal S11. In other words, the signal output circuit 12 outputs a high-level driving suppression signal S21.

[0099] As a result, ECU13 can operate the electric vehicle 1 in the case of [E] (when the charging connector 101 is not connected) (OK judgment).

[0100] In the case of [F], as described above, the reference voltage output circuit 22 outputs 4.76V as the second reference voltage to the second node N2.

[0101] In the case of [F], the voltage at the first node N1 is the voltage divided by resistor 31 and the parallel connection of resistor circuit 102-3 and resistor 32. The resistance value of resistor circuit 102-3 is maximum when the resistance value of resistor 132 is maximum (3.3kΩ). Therefore, the maximum voltage at the first node N1 is 5V × (3.52kΩ / (330Ω + 3.52kΩ)) = 4.57V.

[0102] Therefore, in the case of [F], the comparator 23 outputs a high-level comparison result signal S11. In other words, the signal output circuit 12 outputs a low-level driving suppression signal S21.

[0103] As a result, ECU13 cannot drive electric vehicle 1 in the case of [F] (when the charging connector 101 is connected) (Judgment OK).

[0104] In summary, considering cases [A] through [F], the voltage output circuit 21 outputs different voltages to the first node N1 based on the first control signal S1, depending on whether the charging connector 101 is connected to the electric vehicle 1 or not. The reference voltage output circuit 22 outputs a reference voltage to the second node N2 based on the second control signal S2, between the voltage at the first node N1 when the charging connector 101 is connected to the electric vehicle 1 and the voltage at the first node N1 when the charging connector 101 is not connected to the electric vehicle 1.

[0105] More specifically, when the second control signal S2 is at a high level, the reference voltage output circuit 22 outputs a first reference voltage (4.27V) to the second node N2 that is lower than the voltage at the first node N1 when the Type 1 or Type 2 charging connector 101 is not connected to the electric vehicle 1, and higher than the voltage at the first node N1 when the Type 1 or Type 2 charging connector 101 is connected to the electric vehicle 1.

[0106] Furthermore, when the second control signal S2 is at a low level, the reference voltage output circuit 22 outputs a second reference voltage (4.76V) to the second node N2 that is lower than the voltage at the first node N1 when the GB / T charging connector 101 is not connected to the electric vehicle 1, and higher than the voltage at the first node N1 when the GB / T charging connector 101 is connected to the electric vehicle 1.

[0107] The comparator 23 outputs a low-level comparison result signal S11 if the Type 1, Type 2, or GB / T charging connector 101 is not connected to the electric vehicle 1. The comparator 23 also outputs a high-level comparison result signal S11 if the Type 1, Type 2, or GB / T charging connector 101 is connected to the electric vehicle 1.

[0108] Therefore, the signal output circuit 12 outputs a high-level driving suppression signal S21 when the Type 1, Type 2, or GB / T charging connector 101 is not connected to the electric vehicle 1. Also, the signal output circuit 12 outputs a low-level driving suppression signal S21 when the Type 1, Type 2, or GB / T charging connector 101 is connected to the electric vehicle 1.

[0109] The ECU13 can operate the electric vehicle 1 when the driving restriction signal S21 is at a high level (when the charging connector 101 is not connected to the electric vehicle 1). On the other hand, the ECU13 cannot operate the electric vehicle 1 when the driving restriction signal S21 is at a low level (when the charging connector 101 is connected to the electric vehicle 1).

[0110] (effect) The signal output circuit 12 outputs a high-level driving suppression signal S21 when the Type 1, Type 2, or GB / T charging connector 101 is not connected to the electric vehicle 1. The signal output circuit 12 also outputs a low-level driving suppression signal S21 when the Type 1, Type 2, or GB / T charging connector 101 is connected to the electric vehicle 1.

[0111] Thus, the signal output circuit 12 does not need to be modified according to the charging specifications of the electric vehicle 1. Therefore, the signal output circuit 12 can have fewer part numbers, reduce evaluation man-hours, and as a result reduce costs.

[0112] While embodiments of the present disclosure have been described above, the present disclosure is not limited by the content of these embodiments. Furthermore, the aforementioned components include those that are readily conceivable to those skilled in the art, those that are substantially identical, and those that fall within the so-called equivalent range. Moreover, the aforementioned components can be combined as appropriate. Furthermore, various omissions, substitutions, or modifications of the components can be made without departing from the spirit of the embodiments described above. [Explanation of symbols]

[0113] 1 electric car 11 Inlet 12 Signal output circuit 13 ECU 31, 32, 41, 42, 43, 111, 112, 121, 131, 132 resistors 23 Comparator 24 Transmission Circuit 33. First switch 44 Second switch 101 Charging Connector 102 Resistance circuit 103 terminals 113, 133 switches

Claims

1. A signal output circuit, which is installed in an electric vehicle with a charging specification of Type 1 (SAE J1772), Type 2 (IEC 62196), or GB / T (GB / T 20234), and outputs a driving suppression signal for suppressing the driving of the electric vehicle, A first terminal is electrically connected to the PP (Proximity Pilot) terminal of the Type 1 or Type 2 charging connector, or to the CC (Charging Confirmation) terminal of the GB / T charging connector, A second terminal that outputs the aforementioned driving suppression signal, A third terminal receives a first control signal which is at a first level when the charging specification of the electric vehicle is Type 1, and at a second level when the charging specification of the electric vehicle is Type 2 or GB / T. A fourth terminal receives a second control signal that is at a first level when the charging specification of the electric vehicle is Type 1 or Type 2, and at a second level when the charging specification of the electric vehicle is GB / T. A voltage output circuit electrically connected to the first terminal, which outputs different voltages to the first node depending on whether the charging connector is connected to the electric vehicle or not, based on the first control signal, A reference voltage output circuit outputs to the second node a reference voltage between the voltage at the first node when the charging connector is connected to the electric vehicle and the voltage at the first node when the charging connector is not connected to the electric vehicle, based on the second control signal. A comparator or operational amplifier having a first input terminal electrically connected to the first node, a second input terminal electrically connected to the second node, outputting a first-level comparison result signal from the output terminal when the voltage at the first input terminal is lower than the voltage at the second input terminal, and outputting a second-level comparison result signal from the output terminal when the voltage at the first input terminal is higher than the voltage at the second input terminal, Includes, The driving suppression signal based on the comparison result signal is output from the second terminal. A signal output circuit characterized by the following features.

2. The aforementioned voltage output circuit is A first resistor, one end of which is electrically connected to the power supply potential and the other end of which is electrically connected to the first node and the first terminal, A second resistor and a first switch are electrically connected in series between the first node and the first terminal and the reference potential, Includes, The first switch is, The first control signal is turned on when it is at a first level, and turned off when it is at a second level. The signal output circuit according to claim 1, characterized in that

3. The aforementioned reference voltage output circuit is When the second control signal is at the first level, a first reference voltage is output to the second node that is lower than the voltage at the first node when the Type 1 or Type 2 charging connector is not connected to the electric vehicle, and higher than the voltage at the first node when the Type 1 or Type 2 charging connector is connected to the electric vehicle. When the second control signal is at the second level, a second reference voltage is output to the second node that is lower than the voltage at the first node when the GB / T charging connector is not connected to the electric vehicle, and higher than the voltage at the first node when the GB / T charging connector is connected to the electric vehicle. The signal output circuit according to claim 1, characterized in that

4. The aforementioned reference voltage output circuit is A third resistor, one end of which is electrically connected to the power supply potential and the other end of which is electrically connected to the second node, A fourth resistor, one end of which is electrically connected to the second node and the other end of which is electrically connected to a reference potential, A fifth resistor and a second switch are electrically connected in series between the second node and the reference potential, Includes, The second switch is, The second control signal is turned on when it is at the first level, and turned off when it is at the second level. The signal output circuit according to claim 3, characterized in that...

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