PP (Propene Polymer) signal wake-up circuit of electric automobile

Abstract

The utility model provides a PP signal wake-up circuit of an electric vehicle. The PP signal wake-up circuit comprises an acquisition module, a voltage stabilization module and a wake-up module, the acquisition module is connected with the single-chip microcomputer and used for acquiring a plug-in signal of a charging gun, the wake-up module is connected with the voltage stabilization module and the acquisition module, one end of the voltage stabilization module is connected with the storage battery, the other end of the voltage stabilization module is connected with the post-stage wake-up module and used for providing power supply for the wake-up module, and the wake-up module is connected with an SBC power supply; in response to the state that the charging gun is not inserted, the awakening signal output by the awakening module is low level, and the automobile charging controller is not awakened; and in response to the charging gun plugging state, the awakening signal output by the awakening module is high level, and the automobile charging charger is awakened. The method has the advantage of plug-and-wake-up, and the controller can be awakened without other complex operations; and meanwhile, a low-power-consumption circuit design is adopted, and the minimum consumption of electric energy of the automobile is ensured by the magnitude of quiescent current hundred microamperes.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of new energy vehicle charging, and particularly relates to an electric vehicle PP signal wake-up circuit. BACKGROUND

[0002] Many existing new energy charging controllers EVCC do not have a PP signal wake-up function, so they cannot directly wake up the controller when the gun is inserted. The controller is in a completely closed state. Only after the charging gun action is completed, the controller is awakened through the charging pile CAN or CP (charging guide signal), which causes inaccurate monitoring of the charging gun state during charging, resulting in misjudgment. The EVCC needs to be plugged in and out multiple times to wake up the EVCC to achieve the purpose of charging. At the same time, the existing new energy charging controller EVCC also lacks function detection of the charging gun insertion action, and cannot confirm the charging effective state by detecting the signal during the charging gun insertion process, so as to provide corresponding charging protection and safety protection, and intelligent functions such as charging invalidity prompting. CONTENT OF THE INVENTION

[0003] Therefore, the application aims to provide an electric vehicle PP signal wake-up circuit to solve at least one of the above problems.

[0004] To achieve the above purpose, the technical scheme of the application is as follows:

[0005] The application provides an electric vehicle PP signal wake-up circuit, which comprises a collection module, a voltage stabilizing module and a wake-up module.

[0006] The collection module is connected with a single-chip microcomputer and is used for collecting a charging gun insertion signal. The wake-up module is connected with the voltage stabilizing module and the collection module respectively. One end of the voltage stabilizing module is connected with a storage battery, and the other end is connected with the wake-up module in the rear stage and is used for providing power supply for the wake-up module. The wake-up module is also connected with an SBC power supply.

[0007] In response to the charging gun being in an uninserted state, the wake-up signal output by the wake-up module is in a low level, and the electric vehicle charging controller is not awakened.

[0008] In response to the charging gun being in an inserted state, the wake-up signal output by the wake-up module is in a high level, and the electric vehicle charging controller is awakened.

[0009] Further, the collection module comprises a switching circuit composed of a first switching tube, a second switching tube, a third resistor, a second capacitor, a fifth resistor, a sixth resistor and a seventh resistor.

[0010] The first end of the first switch tube is connected with the third end of the second switch tube through the fifth resistor, the second end of the first switch tube is connected with the wake-up module, the third resistor and the second capacitor are connected in parallel between the first end and the second end of the first switch tube, and the third end of the first switch tube is connected with the single-chip microcomputer through the second resistor.

[0011] The first end of the second switch tube is connected with the sixth resistor and the seventh resistor respectively, the other end of the sixth resistor is connected with a 5V0 power supply end, the other end of the seventh resistor is grounded, and the third end of the second switch tube is grounded.

[0012] Further, the first switch tube comprises a first MOS tube, the first MOS tube is a P-type MOS tube, the gate of the first MOS tube is connected with the first end of the fifth resistor, the source of the first MOS tube is connected with the wake-up module, and the drain of the first MOS tube is connected with the second resistor.

[0013] Further, the second switch tube comprises a second MOS tube, the second MOS tube is an N-type MOS tube, the gate of the second MOS tube is connected with the second end of the fifth resistor, the source of the second MOS tube is grounded, and the drain of the second MOS tube is connected with the sixth resistor and the seventh resistor respectively.

[0014] Further, the voltage stabilizing module comprises a voltage stabilizing circuit composed of a third switch tube, a first voltage stabilizing tube, a fourteenth resistor and a fourth capacitor.

[0015] The first end of the third switch tube is connected with the cathode of the first voltage stabilizing tube, the anode of the first voltage stabilizing tube is grounded, the second end of the third switch tube is configured to output a BATT-5V6 voltage to the wake-up module in the rear stage, the third end of the third switch tube is connected with a storage battery, and the fourteenth resistor is arranged between the first end and the third end of the third switch tube.

[0016] Further, the third switch tube comprises a first triode, the first triode is an NPN-type triode, the base of the first triode is connected with the first voltage stabilizing tube, the collector of the first triode is connected with the storage battery, and the emitter of the first triode is connected with the wake-up module in the rear stage.

[0017] Further, the wake-up module comprises a comparator circuit composed of a voltage dividing circuit and a switching circuit.

[0018] The voltage dividing circuit comprises a first comparator, the noninverting input of the first comparator is connected with a ninth resistor and a tenth resistor respectively, the other end of the ninth resistor is grounded, the other end of the tenth resistor is connected with a BATT-5V6 power supply end, the inverting input of the first comparator is connected with the second end of the first switch tube, and the output of the first comparator is connected with an enable port of an SBC power supply through an eleventh resistor.

[0019] The switch circuit comprises a second comparator and a fourth switch tube, the noninverting input of the second comparator is connected with an eighteenth resistor and a nineteenth resistor respectively, the other end of the eighteenth resistor is connected with a 5V0 power supply end, the other end of the nineteenth resistor is grounded, the inverting input of the second comparator is connected with a fifteenth resistor and a sixteenth resistor respectively, the other end of the fifteenth resistor is grounded, the other end of the sixteenth resistor is connected with a BATT-5V6 power supply end, the output of the second comparator is connected with the first end of the fourth switch tube through a seventeenth resistor, the third end of the fourth switch tube is connected with the inverting input of the first comparator through a twelfth resistor, and the second end of the fourth switch tube is connected with the second end of the third switch tube.

[0020] Further, the fourth switch tube comprises a fourth MOS tube, the fourth MOS tube is a P-type MOS tube, the drain of the fourth MOS tube is connected with the twelfth resistor, the gate of the fourth MOS tube is connected with the seventeenth resistor, and the source of the fourth MOS tube is connected with the emitter of the first triode.

[0021] Compared with the prior art, the electric vehicle PP signal wake-up circuit has the following beneficial effects:

[0022] The electric vehicle PP signal wake-up circuit has the advantage of "plug and wake up", and the controller can be woken up without other complex operations, whether the vehicle is in a power-on or power-off state. Meanwhile, the wake-up mode is increased, and the host factory can select a suitable wake-up source according to the vehicle architecture. Most importantly, the low-power circuit design can ensure that the vehicle charging controller is in a "transparent" state of power consumption when it does not need to be charged, and the static current is in the order of hundreds of microamperes, thereby ensuring the minimum consumption of vehicle power. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of this application illustrated in the drawings, and their description, are used to explain the application and are not intended to limit the application unduly.

[0024] Figure 1 The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of this application illustrated in the drawings, and their description, are used to explain the application and are not intended to limit the application unduly.

[0025] Figure 2 The voltage stabilizing module circuit diagram described in the embodiments of the present application;

[0026] Figure 3 The wake-up module circuit diagram described in the embodiments of the present application;

[0027] Figure 4 The acquisition module circuit diagram described in the embodiments of the present application. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments and the accompanying drawings.

[0029] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood as the general meaning understood by those skilled in the art to which the present application belongs. The terms "first", "second" and the like used in the embodiments of the present application do not represent any order, number or importance, but are only used to distinguish different components. The terms "include", "contain" and the like mean that the elements or objects before the terms cover the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and the like do not mean physical or mechanical connection, but can be logical or

[0030] logical connection, including electrical connection, whether direct or indirect. The terms "up", "down", "left", "right" and the like only represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0031] Please refer to Figure 1 The embodiments of the present application provide an electric vehicle PP signal wake-up circuit, which comprises an acquisition module, a voltage stabilizing module and a wake-up module.

[0032] The acquisition module is connected with a single-chip microcomputer and is used for acquiring a charging gun plug-in signal. The wake-up module is connected with the voltage stabilizing module and the acquisition module respectively. One end of the voltage stabilizing module is connected with a storage battery, and the other end is connected with the wake-up module in the rear stage and is used for providing power supply for the wake-up module. The wake-up module is also connected with an SBC power supply.

[0033] In response to the charging gun being in a non-plug-in state, the wake-up signal output by the wake-up module is low, and the electric vehicle charging controller is not woken up.

[0034] In response to the charging gun being in a plug-in state, the wake-up signal output by the wake-up module is high, and the electric vehicle charging controller is woken up.

[0035] The PP signal wake-up circuit of the electric vehicle described in the embodiment is connected by a matched collection module, a voltage stabilizing module and a wake-up module. The insertion state of the charging gun is determined according to the insertion signal of the collection module, and the high and low levels output by the wake-up module are controlled to realize the wake-up of the vehicle charging controller. The circuit increases the selectable wake-up source of the new energy vehicle charging controller. On the basis of hard-wire wake-up, CAN wake-up and CP wake-up, the newly added PP wake-up can provide more wake-up mode selection for the host factory when adapting to vehicle models, increase the selectability of engineers and design convenience, and customers can select single or multiple trigger wake-up charging controller modes according to the actual use scene.

[0036] Compared with other modes such as key wake-up and bus wake-up, the PP signal wake-up circuit has the advantage of "plug and wake up". The controller can be woken up without other complex operations, regardless of the power-on or power-off state of the vehicle. At the same time, the wake-up mode is increased. The host factory can select the appropriate wake-up source according to the vehicle architecture. Most importantly, it has a low-power circuit design, which can ensure that the vehicle charging controller is in a "transparent" state of power consumption when not charging, with a static current of the order of hundreds of microamperes, to ensure the minimum consumption of vehicle power.

[0037] In some embodiments, as shown in Figure 2 The voltage stabilizing module includes a voltage stabilizing circuit composed of a third switch tube Q3 (the third switch tube in the embodiment is selected as an NPN type triode), a first voltage stabilizing tube ZD1, a fourteenth resistor R14 and a fourth capacitor C4.

[0038] The first end of the third switch tube Q3 is connected with the cathode of the first voltage stabilizing tube ZD1, the anode of the first voltage stabilizing tube ZD1 is grounded, the second end of the third switch tube Q3 is configured to output a BATT-5V6 voltage to the wake-up module in the rear stage, the third end of the third switch tube Q3 is connected with the storage battery, and the fourteenth resistor R14 is arranged between the first end and the third end of the third switch tube Q3.

[0039] Specifically, in the embodiment, since BATT2 is the constant voltage of the storage battery, the battery voltage will change with the consumption of the battery power, which is not conducive to the work and low-power requirement of the wake-up circuit in the rear stage. Therefore, the triode Q3, the voltage stabilizing tube ZD1, the current limiting resistor R14, the protection voltage stabilizing tube and the C4 filter capacitor are adopted to constitute a simple series voltage stabilizing power supply to supply a stable 5.6V voltage to the wake-up circuit in the rear stage.

[0040] In some embodiments, as shown in Figure 3 The wake-up module includes a comparator circuit composed of a voltage dividing circuit and a switching circuit.

[0041] The voltage dividing circuit comprises a first comparator U1A, the noninverting input terminal of the first comparator U1A is connected with a ninth resistor R9 and a tenth resistor R10 respectively, the other end of the ninth resistor R9 is grounded, the other end of the tenth resistor R10 is connected with a BATT-5V6 power supply terminal, the inverting input terminal of the first comparator U1A is connected with the second terminal of the first switch tube Q1, and the output terminal of the first comparator U1A is connected with the enable port of the SBC power supply through an eleventh resistor R11.

[0042] The switch circuit comprises a second comparator U1B and a fourth switch tube Q4, the noninverting input terminal of the second comparator U1B is connected with an eighteenth resistor R18 and a nineteenth resistor R19 respectively, the other end of the eighteenth resistor R18 is connected with a 5V0 power supply terminal, the other end of the nineteenth resistor R19 is grounded, the inverting input terminal of the second comparator U1B is connected with a fifteenth resistor R15 and a sixteenth resistor R16 respectively, the other end of the fifteenth resistor R15 is grounded, the other end of the sixteenth resistor R16 is connected with a BATT-5V6 power supply terminal, the output terminal of the second comparator U1B is connected with the first terminal of the fourth switch tube Q4 through a seventeenth resistor R17, the third terminal of the fourth switch tube Q4 is connected with the inverting input terminal of the first comparator U1A through a twelfth resistor R12, and the second terminal of the fourth switch tube Q4 is connected with the second terminal of the third switch tube Q3.

[0043] Specifically, in the embodiment, the reason for selecting the comparator U1 of the NCV2903DR2G type is to meet the wide voltage supply and the extremely low working current (≤0.4 mA) and to select a large resistance value for the voltage dividing network to realize the low power consumption of the wake-up circuit. The wake-up module is specifically explained as follows:

[0044] ① No charging gun state: at this time, the controller is in a complete power-off state, and the power supply is only the BATT2 constant power and the BATT-5V6 voltage generated by the voltage stabilizing circuit.

[0045] The comparator circuit is built by using the U1 comparator, the noninverting input terminal of the U1B comparator is connected with an input circuit composed of a 5V0, an R18 resistor and an R19 resistor, and since there is no voltage dividing, when there is the 5V0, the 5 pin of the U1B comparator is given a 5V voltage, and when there is no 5V0, the U1B comparator voltage is stably pulled down to 0V due to the existence of the R19 pull-down resistor, thereby preventing external crosstalk and improving the stability of the circuit. The 6 pin of the U1B comparator is composed of a 1:1 voltage dividing network composed of a reference source BATT-5V6, an R16 resistor and an R15 resistor, at this time, the 5 pin of the U1B comparator is 0V, and the 6 pin is 2.8V, so that the 7 pin of the U1B comparator outputs a low level 0V.

[0046] As can be seen from the above analysis, the switching circuit composed of the U1B comparator, Q4 switch tube and R13 resistor meets the VGS threshold voltage of the Q4 switch tube. Q4 is in the on state, and BATT-5V6 is divided by R12 and the car charger R5 resistor to provide a voltage of 2.52V to the 2nd pin of the U1A comparator. The 3rd pin of the U1A comparator is divided by BATT-5V6, R10 resistor and R9 resistor to provide a voltage of 1.39V to the 3rd pin of the U1A comparator. Therefore, the 1st pin of the U1A comparator outputs a low level, that is, the controller wake-up signal PP_WAKE is low, and the controller cannot be woken up.

[0047] ②Charging gun plugging status: When the charging gun contacts the PP pin during the plugging action, BATT-5V6 is divided by the R12 resistor, the car charging stand R5 resistor, and the charging gun R6 and R7 to give it to the 2nd pin of the U1A comparator, and the voltage is 0.615V; the 3rd pin of the U1A comparator is composed of the BATT-5V6, R10 and R9 to form a voltage divider circuit, and the voltage given to the 3rd pin of the U1A comparator is 1.39V, so the 1st pin of the U1A comparator outputs a high level, that is, the controller wake-up signal PP_WAKE is high, which can wake up the controller.

[0048] In some embodiments, as Figure 4 As shown, the acquisition module includes a switching circuit consisting of a first switch tube Q1 (the first switch tube in this embodiment is a PMOS tube), a second switch tube Q2 (the first switch tube in this embodiment is an NMOS tube), a third resistor R3, a second capacitor C2, a fifth resistor R5, a sixth resistor R6 and a seventh resistor R7;

[0049] A first end of the first switching tube Q1 is connected to a third end of the second switching tube Q2 via a fifth resistor R5. A second end of the first switching tube Q1 is connected to a wake-up module. A third resistor R3 and a second capacitor C2 are connected in parallel between the first and second ends of the first switching tube Q1. The third end of the first switching tube Q1 is connected to a 5V0 power supply terminal and to a microcontroller via a second resistor R2. A voltage regulator tube D1 is provided between the second resistor R2 and the microcontroller. The cathode of the voltage regulator tube D1 is connected to the 5V0 power supply terminal, and the anode is grounded.

[0050] The first end of the second switch tube Q2 is connected to the sixth resistor R6 and the seventh resistor R7 respectively, the other end of the sixth resistor R6 is connected to the 5V0 power supply terminal, the other end of the seventh resistor R7 is grounded, and the third end of the second switch tube Q2 is grounded.

[0051] Specifically, in the embodiment, after the controller is woken up, the system power supply works normally to output 5V0, the 5th pin of the U1B comparator is given 5V voltage, and the 6th pin of the U1B comparator is given a 1:1 voltage division network composed of a reference source BATT-5V6, the R16 resistor and the R15 resistor, at this time, the 5th pin of the U1B comparator is 5V, the 6th pin is 2.8V, and thus the 7th pin of the U1B comparator outputs a high level 5.6V. Thus, the threshold voltage of the MOS tube Q4 does not meet the opening condition, the MOS tube Q4 is closed, so that the interference of the switching circuit and the voltage stabilizing circuit on the PP collection can be avoided, and the PP port is a connection port of the charging pile, and the PP_WAKE is a wake-up signal used to enable the power supply output.

[0052] At this time, the switching states of the MOS tube Q1 and the MOS tube Q4 are interchanged.

[0053] The switching circuit composed of Q1, Q2, R3, C2, R5, R6 and R7 has no 5V0 output in the controller sleep state, and Q1 cannot be opened, thus, the Q1 rear circuit cannot interfere with the R12 and the charging seat and charging gun resistance voltage division.

[0054] The switching circuit composed of Q1, Q2, R3, C2, R5, R6 and R7 has 5V0 output after the controller is woken up, Q1 is normally opened, and the charging gun resistance can be normally collected for charging adaptation.

[0055] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should be covered in the scope of the claims and the specification of the utility model.

[0056] The embodiments of the present application are intended to cover all such replacements, modifications and variations falling within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present application should be included in the protection scope of the present application.

Claims

1. An electric vehicle PP signal wake-up circuit, characterized in that: comprising an acquisition module, a voltage stabilizing module and a wake-up module; the acquisition module is connected with a single-chip microcomputer for collecting a charging gun plug-in signal, the wake-up module is connected with the voltage stabilizing module and the acquisition module respectively, one end of the voltage stabilizing module is connected with a storage battery, the other end is connected with the wake-up module in the rear stage for providing power supply for the wake-up module, and the wake-up module is further connected with an SBC power supply; in response to the charging gun being in a non-plug-in state, a wake-up signal output by the wake-up module is low level, and the electric vehicle charging controller is not woken up; in response to the charging gun being in a plug-in state, the wake-up signal output by the wake-up module is high level, and the electric vehicle charging controller is woken up.

2. The electric vehicle PP signal wake-up circuit according to claim 1, characterized in that: the acquisition module comprises a switching circuit composed of a first switch tube, a second switch tube, a third resistor, a second capacitor, a fifth resistor, a sixth resistor and a seventh resistor; a first end of the first switch tube is connected with a third end of the second switch tube through the fifth resistor, a second end of the first switch tube is connected with the wake-up module, the third resistor and the second capacitor are connected in parallel between the first end and the second end of the first switch tube, and a third end of the first switch tube is connected with a single-chip microcomputer through a second resistor; a first end of the second switch tube is connected with the sixth resistor and the seventh resistor respectively, the other end of the sixth resistor is connected with a 5V0 power supply end, the other end of the seventh resistor is grounded, and a third end of the second switch tube is grounded.

3. The electric vehicle PP signal wake-up circuit according to claim 2, characterized in that: the first switch tube comprises a first MOS tube, the first MOS tube is a P-type MOS tube, a gate of the first MOS tube is connected with a first end of the fifth resistor, a source of the first MOS tube is connected with the wake-up module, and a drain of the first MOS tube is connected with the second resistor.

4. The electric vehicle PP signal wake-up circuit according to claim 2, characterized in that: the second switch tube comprises a second MOS tube, the second MOS tube is an N-type MOS tube, a gate of the second MOS tube is connected with a second end of the fifth resistor, a source of the second MOS tube is grounded, and a drain of the second MOS tube is connected with the sixth resistor and the seventh resistor respectively.

5. The electric vehicle PP signal wake-up circuit according to claim 2, characterized in that: the voltage stabilizing module comprises a voltage stabilizing circuit composed of a third switch tube, a first voltage stabilizing tube, a fourteenth resistor and a fourth capacitor; a first end of the third switch tube is connected with a cathode of the first voltage stabilizing tube, an anode of the first voltage stabilizing tube is grounded, a second end of the third switch tube is configured to output a BATT-5V6 voltage for the wake-up module in the rear stage, a third end of the third switch tube is connected with a storage battery, and the fourteenth resistor is arranged between the first end and the third end of the third switch tube. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 6. The electric vehicle PP signal wake-up circuit according to claim 5, characterized in that: the third switch tube comprises a first triode, the first triode is an NPN type triode, the base of the first triode is connected with the first voltage stabilizing tube, the collector of the first triode is connected with the battery, and the emitter of the first triode is connected with the wake-up module in the rear stage.

7. The electric vehicle PP signal wake-up circuit according to claim 6, characterized in that: the wake-up module comprises a comparator circuit composed of a voltage dividing circuit and a switch circuit; wherein the voltage dividing circuit comprises a first comparator, the non-inverting input terminals of the first comparator are respectively connected with a ninth resistor and a tenth resistor, the other end of the ninth resistor is grounded, the other end of the tenth resistor is connected with a BATT-5V6 power supply terminal, the inverting input terminal of the first comparator is connected with the second terminal of the first switch tube, and the output terminal of the first comparator is connected with the enable port of the SBC power supply through an eleventh resistor; the switch circuit comprises a second comparator and a fourth switch tube, the non-inverting input terminals of the second comparator are respectively connected with an eighteenth resistor and a nineteenth resistor, the other end of the eighteenth resistor is connected with a 5V0 power supply terminal, the other end of the nineteenth resistor is grounded, the inverting input terminals of the second comparator are respectively connected with a fifteenth resistor and a sixteenth resistor, the other end of the fifteenth resistor is grounded, the other end of the sixteenth resistor is connected with a BATT-5V6 power supply terminal, the output terminal of the second comparator is connected with the first terminal of the fourth switch tube through a seventeenth resistor, the third terminal of the fourth switch tube is connected with the inverting input terminal of the first comparator through a twelfth resistor, and the second terminal of the fourth switch tube is connected with the second terminal of the third switch tube.

8. The electric vehicle PP signal wake-up circuit according to claim 7, characterized in that: the fourth switch tube comprises a fourth MOS tube, the fourth MOS tube is a P-type MOS tube, the drain of the fourth MOS tube is connected with the twelfth resistor, the gate of the fourth MOS tube is connected with the seventeenth resistor, and the source of the fourth MOS tube is connected with the emitter of the first triode.

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