Charging wake-up circuit

Abstract

The utility model provides a charging wake-up circuit. The circuit comprises a CC detection module, a first wake-up module, a main control chip, a CP detection module and a second wake-up module. The CC detection module is connected with the charging gun and the first wake-up module and is used for detecting a CC signal sent by the charging gun and sending the CC signal to the first wake-up module; the first wake-up module is connected with the main control chip and is used for converting the CC signal into a first wake-up signal and sending the first wake-up signal to the main control chip; the CP detection module is connected with the charging gun and the second wake-up module and is used for detecting a CP signal sent by the charging gun and sending the CP signal to the second wake-up module; the second wake-up module is connected with the main control chip and is used for converting the CP signal into a second wake-up signal and sending the second wake-up signal to the main control chip; and the main control chip is used for awakening the vehicle to charge according to the first awakening signal or the second awakening signal. The problem that in the prior art, after the vehicle does not swipe the card within the preset wakeup time period, the vehicle enters the dormant state, and consequently charging fails is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a charging wake-up circuit. BACKGROUND

[0002] In the related art, the charging machine only has a plug-in gun CC wake-up, and needs to keep the charging machine awake for a long time after plugging in the gun, so that the user can swipe the card to charge within the preset card swiping period. If the user swipes the card to charge beyond the preset card swiping period, the vehicle has entered a sleep state, which will result in a charging failure of the vehicle. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the present application provides a charging wake-up circuit to solve the problem that the vehicle will enter a sleep state and result in a charging failure when the vehicle does not swipe the card within the preset wake-up period in the related art.

[0004] The present application provides a charging wake-up circuit, which comprises a CC detection module, a first wake-up module, a master control chip, a CP detection module and a second wake-up module. The CC detection module is connected with the charging gun and the first wake-up module respectively, and is used for detecting the CC signal sent by the charging gun and sending the CC signal to the first wake-up module. The first wake-up module is connected with the master control chip, and is used for converting the CC signal into a first wake-up signal and sending the first wake-up signal to the master control chip. The CP detection module is connected with the charging gun and the second wake-up module respectively, and is used for detecting the CP signal sent by the charging gun and sending the CP signal to the second wake-up module. The second wake-up module is connected with the master control chip, and is used for converting the CP signal into a second wake-up signal and sending the second wake-up signal to the master control chip. The master control chip is used for waking up the vehicle to charge according to the first wake-up signal or the second wake-up signal.

[0005] In an optional manner, the CC detection module comprises a first protection unit and a wake-up detection unit. The first protection unit is connected with the charging gun and the wake-up detection unit respectively, and is used for absorbing the inrush voltage output by the charging gun, and also used for collecting the CC signal sent by the charging gun and sending the CC signal to the wake-up detection unit. The wake-up detection unit is connected with the master control chip, and is used for sending the CC signal to the first wake-up module.

[0006] In an optional manner, the first protection unit comprises a first fuse, a first TVS tube and a first resistor. The first end of the first fuse is connected with the charging gun, and the second end of the first fuse is connected with the first end of the first TVS tube. The second end of the first TVS tube is connected with the first end of the first resistor, and the third end of the first TVS tube is grounded. The second end of the first resistor is connected with the wake-up detection unit.

[0007] In an alternative mode, the wake-up detection unit comprises a second resistor, a third resistor, a first capacitor, a first diode, a first MOS tube, a fourth resistor and a second capacitor; the first end of the second resistor is connected with the first end of the first resistor and the first end of the second capacitor, the second end of the second resistor is connected with the first end of the third resistor, the first end of the first capacitor, the negative electrode of the first diode, the battery and the drain of the first MOS tube respectively; the second end of the third resistor is connected with the second end of the first capacitor, the positive electrode of the first diode, the gate of the first MOS tube and the first end of the fourth resistor respectively; the source of the first MOS tube is connected with the first wake-up module; the second end of the fourth resistor is connected with the master control chip and the second end of the second capacitor respectively.

[0008] In an alternative mode, the CC detection module further comprises a power detection unit connected with the first protection unit and the master control chip respectively; the power detection unit comprises a second MOS tube, a fifth resistor, a sixth resistor, a seventh resistor, a third capacitor, an eighth resistor, a second diode, a third MOS tube, a fourth capacitor, a ninth resistor, a tenth resistor and a fifth capacitor; the gate of the second MOS tube is connected with the first end of the fifth resistor, the first end of the sixth resistor and the master control chip respectively, the drain of the second MOS tube is connected with the first protection unit and the drain of the third MOS tube respectively, the source of the second MOS tube is connected with the first end of the seventh resistor; the second end of the fifth resistor is connected with the first power supply end, the first end of the third capacitor and the first end of the eighth resistor respectively; the second end of the sixth resistor is connected with the second power supply end, the second end of the seventh resistor and the negative electrode of the second diode respectively; the second end of the third capacitor is grounded; the gate of the third MOS tube is connected with the second end of the eighth resistor, the first end of the fourth capacitor, the first end of the ninth resistor and the master control chip respectively, the source of the third MOS tube is connected with the second end of the fourth capacitor, the positive electrode of the second diode and the first end of the tenth resistor respectively; the second end of the tenth resistor is connected with the master control chip and the first end of the fifth capacitor respectively; the second end of the ninth resistor is connected with the second end of the fifth capacitor and grounded.

[0009] In an alternative mode, the CP detection module comprises a second protection unit; the second protection unit is connected with the charging gun and the second wake-up module respectively, for absorbing the surge voltage output by the charging gun, and for collecting the CP signal sent by the charging gun and sending to the second wake-up module; the second protection unit comprises a second fuse, a second TVS tube and a third diode; the first end of the second fuse is connected with the charging gun, and the second end of the first fuse is connected with the first end of the second TVS tube; the second end of the second TVS tube is connected with the positive electrode of the third diode, and the third end of the second TVS tube is grounded; the negative electrode of the third diode is connected with the second wake-up module.

[0010] In an alternative mode, the CP detection module further comprises a duty cycle detection unit; the duty cycle detection unit is connected with the second protection unit and the master control chip respectively, for converting the CP signal into a duty cycle signal and sending to the master control chip; the duty cycle detection unit comprises an eleventh resistor, a twelfth resistor, a fourth diode, a fourth MOS tube and a thirteenth resistor; the first end of the eleventh resistor is connected with the negative electrode of the third diode, and the second end of the eleventh resistor is connected with the first end of the twelfth resistor, the negative electrode of the fourth diode and the gate of the fourth MOS tube respectively; the drain of the fourth MOS tube is connected with the master control chip and the first end of the thirteenth resistor respectively; the second end of the thirteenth resistor is connected with the second power supply end; the second end of the twelfth resistor, the positive electrode of the fourth diode and the source of the fourth MOS tube are connected and grounded.

[0011] In an alternative mode, the CP detection module further comprises: a charging state detection unit, which is connected with the second protection unit and the master control chip respectively, and is configured to obtain a charging state signal according to a charging state switching signal sent by the master control chip and the CP signal, and send the charging state signal to the master control chip; the charging state detection unit comprises: a fourteenth resistor, a fifth MOS tube, a fifth diode, a sixth diode, a fifteenth resistor, a sixteenth resistor, a fifth capacitor, a sixth MOS tube, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a triode, a twenty-first resistor, a twenty-second resistor, a sixth capacitor, a twenty-third resistor and a twenty-fourth resistor; a first end of the fourteenth resistor is connected with a positive electrode of the fifth diode and the second protection unit respectively, and a second end of the fourteenth resistor is connected with a source electrode of the fifth MOS tube; a gate electrode of the fifth MOS tube is connected with a negative electrode of the sixth diode, a first end of the fifteenth resistor, a first end of the sixteenth resistor, a first end of the fifth capacitor and a source electrode of the sixth MOS tube respectively, and a drain electrode of the fifth MOS tube is connected with a positive electrode of the sixth diode, a second end of the fifteenth resistor, a second end of the fifth capacitor, a drain electrode of the sixth MOS tube and a second end of the seventeenth resistor respectively and grounded; a second end of the sixteenth resistor is connected with a negative electrode of the fifth diode; a gate electrode of the sixth MOS tube is connected with a first end of the seventeenth resistor and a first end of the eighteenth resistor respectively; a second end of the eighteenth resistor is connected with the master control chip; a first end of the nineteenth resistor is connected with the second protection unit and a first end of the twentieth resistor respectively, and a second end of the nineteenth resistor is connected with an emitter electrode of the triode; a base electrode of the triode is connected with a first end of the twenty-first resistor and a first end of the twenty-second resistor respectively, and a collector electrode of the triode is connected with a second end of the twenty-second resistor, a second end of the sixth capacitor and a second end of the twenty-third resistor respectively and grounded; a second end of the twenty-first resistor is connected with the master control chip; a second end of the twentieth resistor is connected with a first end of the twenty-fourth resistor and a first end of the sixth capacitor respectively; and a second end of the twenty-fourth resistor is connected with a first end of the twenty-third resistor and the master control chip respectively.

[0012] In an alternative mode, the second wake-up module comprises: a first amplification unit, a wake-up unit and a second amplification unit; the first amplification unit is connected with the second protection unit and the wake-up unit respectively, for amplifying the CP signal to obtain an amplified CP signal, and transmitting the amplified CP signal to the wake-up unit; the wake-up unit is connected with the second amplification unit, for converting the amplified CP signal into a second wake-up signal, and transmitting the second wake-up signal to the second amplification unit; the second amplification unit is connected with the master control chip, for amplifying the second wake-up signal to obtain an amplified second wake-up signal, and transmitting the amplified second wake-up signal to the master control chip.

[0013] In an alternative mode, the first amplification unit comprises: a twenty-fifth resistor, a seventh diode, a twenty-sixth resistor, a seventh MOS tube and a twenty-seventh resistor; a first end of the twenty-fifth resistor is connected with the second protection unit, a second end of the twenty-fifth resistor is connected with a negative electrode of the seventh diode, a first end of the twenty-sixth resistor and a gate of the seventh MOS tube respectively; a source of the seventh MOS tube is connected with a positive electrode of the seventh diode, a second end of the twenty-sixth resistor and the ground respectively; a drain of the seventh MOS tube is connected with the wake-up unit and a first end of the twenty-seventh resistor respectively; a second end of the twenty-seventh resistor is connected with the third power supply end.

[0014] The CC detection module detects the CC signal received when the charging gun is inserted, and transmits the CC signal to the first wake-up module. The first wake-up module converts the CC signal into a first wake-up signal, and transmits the first wake-up signal to the master control chip to wake up the vehicle. If the CP signal is received within the preset wake-up period, the vehicle can be charged. The CP detection module detects the CP wake-up signal, and transmits the CP signal to the second wake-up module. The second wake-up module converts the CP signal into a second wake-up signal, and transmits the second wake-up signal to the master control chip to wake up the vehicle again, so as to charge the vehicle. The vehicle will enter a sleep state if the vehicle is not swiped within the preset wake-up period, and the vehicle cannot be charged again, which leads to charging failure. The CP detection module detects the CP signal again, and transmits the CP signal to the second wake-up module to convert the CP signal into a second wake-up signal, and transmits the second wake-up signal to the master control chip. The master control chip wakes up the vehicle again to charge the vehicle.

[0015] The above description is only a summary of the technical solutions of the embodiments of the present application. In order to more clearly understand the technical means of the embodiments of the present application, the embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the embodiments of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification. The drawings are not intended to be restrictive in any way. In the drawings:

[0017] Figure 1 A structure diagram of a charging wake-up circuit is shown.

[0018] Figure 2 A circuit diagram of a CC detection module is shown.

[0019] Figure 3 A circuit diagram of a CP detection module is shown.

[0020] Figure 4 A structure diagram of another charging wake-up circuit is shown.

[0021] Figure 5 A circuit diagram of a first amplification unit is shown.

[0022] Figure 6 A circuit diagram of a wake-up chip is shown.

[0023] Figure 7 A circuit diagram of a second amplification unit is shown.

[0024] Figure 8 A circuit diagram of a voltage conversion module is shown. DETAILED DESCRIPTION

[0025] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The following description is made with reference to the accompanying drawings in which like reference numerals refer to like elements throughout. The following detailed description is not intended to limit the application. Instead, the following detailed description is intended to explain the exemplary embodiments of the application for the purpose of the patent law. It should be further understood that the use of the terms "including", "comprising", or "having" and variations thereof herein are intended to be open, non-limiting transitional phrases, such that a statement using such language ceases to be considered as a functioning limitation to the specific items following such term. The contents of the following detailed description are not to be construed as limiting the application, but merely as describing illustrative embodiments of the application.

[0026] The block diagrams shown in the drawings are merely functional entities, and do not necessarily have to correspond to physically independent entities. That is, the functional entities can be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0027] The flowchart shown in the drawings is only an exemplary illustration, and is not necessarily required to include all contents and operations / steps, nor is it necessarily required to be executed in the order described. For example, some operations / steps can be further broken down, and some operations / steps can be combined or partially combined, so the actual execution order can be changed according to actual conditions.

[0028] “Multiple” mentioned in the present application refers to two or more. “And / or” describes the association relationship of associated objects, and indicates that there can be three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone. The character “ / ” generally represents that the associated objects before and after are in an “or” relationship.

[0029] Figure 1 A structure diagram of a charging wake-up circuit provided by an exemplary embodiment of the present application is shown. Please refer to Figure 1 As shown, the charging wake-up circuit includes a CC detection module 100, a first wake-up module 200, a master control chip 300, a CP detection module 400, and a second wake-up module 500.

[0030] The CC detection module 100 is connected to the charging gun and the first wake-up module 200, respectively, for detecting the CC signal emitted by the charging gun and sending it to the first wake-up module 200.

[0031] The first wake-up module 200 is connected to the master control chip 300, for converting the CC signal into a first wake-up signal and sending it to the master control chip 300.

[0032] The CP detection module 400 is connected to the charging gun and the second wake-up module 500, respectively, for detecting the CP signal emitted by the charging gun and sending it to the second wake-up module 500.

[0033] The second wake-up module 500 is connected to the master control chip 300, for converting the CP signal into a second wake-up signal and sending it to the master control chip 300.

[0034] The master control chip 300 is used for waking up the vehicle for charging according to the first wake-up signal or the second wake-up signal.

[0035] The CC signal represents a signal generated when the charging gun is inserted into the vehicle, and the CP signal represents a signal generated when the user charges after inserting the charging gun. The CC detection module 100 detects the CC signal received when the charging gun is inserted and sends the CC signal to the first wake-up module 200. The first wake-up module 200 converts the CC signal into a first wake-up signal and sends the first wake-up signal to the main control chip 300 to wake up the vehicle. If the CP signal is received within the preset wake-up period, the vehicle can be charged. The CP detection module 400 detects the CP wake-up signal and sends the CP wake-up signal to the second wake-up module. The second wake-up module 500 converts the CP signal into a second wake-up signal and sends the second wake-up signal to the main control chip 300 to wake up the vehicle again, thereby achieving charging of the vehicle. The vehicle will enter a sleep state and cannot be charged again if the vehicle is not swiped within the preset wake-up period, resulting in a charging failure. The CP detection module 400 detects the CP signal again and sends the CP signal to the second wake-up module 500, which converts the CP signal into a second wake-up signal and sends the second wake-up signal to the main control chip 300. The main control chip 300 wakes up the vehicle again to charge the vehicle.

[0036] In some embodiments of the present application, the CC detection module 100 includes a first protection unit 110 and a wake-up detection unit 120. The first protection unit 110 is connected to the charging gun and the wake-up detection unit 120, respectively, for absorbing the surge voltage output by the charging gun and for collecting the CC signal emitted by the charging gun and sending the CC signal to the wake-up detection unit 120. The wake-up detection unit 120 is connected to the main control chip 300 for sending the CC signal to the first wake-up module 200.

[0037] The circuit connected to the rear end of the first protection unit 110 is a low-voltage circuit, and the charging gun can have a surge voltage. The surge voltage is a high voltage. By providing the first protection unit 110 between the wake-up detection unit 120 and the charging gun, the first protection unit 110 can absorb the surge voltage output by the charging gun, prevent the surge voltage of the charging gun from entering the circuit connected to the rear end of the first protection unit 110, and transmit the received CC signal to the wake-up detection unit 120, so that the wake-up detection unit 120 sends the CC signal to the first wake-up module 200.

[0038] Figure 2 A circuit diagram of the CC detection module 100 according to an exemplary embodiment of the present application is shown in FIG. 1. Please refer to FIG. 1. Figure 2As shown, the first protection unit 110 includes: a first fuse F1, a first TVS tube T1 and a first resistor R1; a first end of the first fuse F1 is connected with the charging gun, a second end of the first fuse F1 is connected with a first end of the first TVS tube T1; a second end of the first TVS tube T1 is connected with a first end of the first resistor R1, a third end of the first TVS tube T1 is grounded; a second end of the first resistor R1 is connected with the wake-up detection unit 120.

[0039] Wherein, J_CC_I0 represents a connection end with the charging gun, the first fuse F1 is used for fusing when overcurrent of the charging gun end output exceeds a fusing threshold of the first fuse F1, preventing overcurrent from flowing into a later-stage connection circuit of the first protection unit 110; the first TVS tube T1 is used for clamping a surge voltage below a safe voltage when the surge voltage is generated at the charging gun end, and the safe voltage can be 28V for example, when the surge voltage exceeds 28V, the first TVS tube T1 can clamp the surge voltage below 28V, so that the voltage received by the first protection unit 110 is all below 28V, to protect the later-stage connection circuit of the first protection unit 110; the first resistor R1 is used for current limiting, to prevent the current flowing into the later-stage connection circuit of the first protection unit 110 from being too large.

[0040] In some other embodiments of the present application, please refer to Figure 2 As shown, the wake-up detection unit 120 includes: a second resistor R2, a third resistor R3, a first capacitor C1, a first diode D1, a first MOS tube Q1, a fourth resistor R4 and a second capacitor C2; a first end of the second resistor R2 is connected with a second end of the first resistor R1 and a first end of the second capacitor C2, a second end of the second resistor R2 is connected with a first end of the third resistor R3, a first end of the first capacitor C1, a negative electrode of the first diode D1, a storage battery and a drain of the first MOS tube Q1 respectively; a second end of the third resistor R3 is connected with a second end of the first capacitor C1, a positive electrode of the first diode D1, a gate of the first MOS tube Q1 and a first end of the fourth resistor R4 respectively; a source of the first MOS tube Q1 is connected with the first wake-up module 200; a second end of the fourth resistor R4 is connected with the main control chip 300 and a second end of the second capacitor C2 respectively.

[0041] Wherein, Figure 2The middle VCC_BUS represents a connection end with the battery. When the first end of the second resistor R2 receives the CC signal, the gate of the first MOS Q1 receives the CC signal and is turned on, so as to send the CC signal to the first wake-up module 200. The first wake-up module 200 converts the CC signal into a first wake-up signal to wake up the main control chip 300. After being woken up, the main control chip 300 can receive the CC signal through the second end of the fourth resistor R4, that is, the CCCP_SINK connection end. The main control chip 300 can determine whether the received CC signal is abnormal, so as to determine whether the charging gun end has a fault. When the charging gun end has a fault, the main control chip 300 can send a related control signal to disconnect the connection with the charging gun. The first diode D1 is used to prevent the battery end from outputting an overvoltage. The first capacitor C1 is used for filtering. The CC_WAKE_UP represents a connection end with the first wake-up module 200. The CCCP_SINK represents a connection end with the main control chip 300. The second capacitor C2 is used to filter the CC signal input to the main control chip 300.

[0042] In some other embodiments of the present application, referring to FIG. 1, Figure 2 As shown in FIG. 1, the CC detection module 100 further comprises a power detection unit 130 connected with the first protection unit 110 and the main control chip 300.

[0043] The power detection unit 130 comprises a second MOS Q2, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a third capacitor C3, an eighth resistor R8, a second diode D2, a third MOS Q3, a fourth capacitor C4, a ninth resistor R9, a tenth resistor R10 and a fifth capacitor C5. The gate of the second MOS Q2 is connected with the first end of the fifth resistor R5, the first end of the sixth resistor R6 and the main control chip 300. The drain of the second MOS Q2 is connected with the first protection unit 110 and the drain of the third MOS Q3. The source of the second MOS Q2 is connected with the first end of the seventh resistor R7. The second end of the fifth resistor R5 is connected with the first power end VCC1, the first end of the third capacitor C3 and the first end of the eighth resistor R8. The second end of the sixth resistor R6 is connected with the second power end VCC2, the second end of the seventh resistor R7 and the negative electrode of the second diode D2. The second end of the third capacitor C3 is grounded. The gate of the third MOS Q3 is connected with the second end of the eighth resistor R8, the first end of the fourth capacitor C4, the first end of the ninth resistor R9 and the main control chip 300. The source of the third MOS Q3 is connected with the second end of the fourth capacitor C4, the positive electrode of the second diode D2 and the first end of the tenth resistor R10. The second end of the tenth resistor R10 is connected with the main control chip 300 and the first end of the fifth capacitor C5. The second end of the ninth resistor R9 is connected with the second end of the fifth capacitor C5 and grounded.

[0044] The power detection unit 130 and the charging gun form a loop, and the main control chip 300 can identify the charging resistance value of the charging gun through the loop formed by the power detection unit 130 and the charging gun loop, so as to determine the size of the charging power according to the size of the charging resistance value. After the main control chip 300 is woken up, the main control chip 300 sends a control signal to the gate of the second MOS tube Q2 and the gate of the third MOS tube Q3 to control the conduction of the second MOS tube Q2 and the third MOS tube Q3, so as to detect the resistance value of the charging gun. According to the resistance value of the charging gun, the corresponding charging power is obtained. For example, if the charging resistance value of the charging gun is 110 ohms, the corresponding charging power is 3.3KW; if the charging resistance value of the charging gun is 220 ohms, the corresponding charging power is 6.6KW. The first power supply end VCC1 can be 12V, and the second power supply end VCC2 can be 5V.

[0045] Figure 3 The circuit diagram of the CP detection module 400 provided by the exemplary embodiment of the application is shown. Please refer to Figure 3 As shown, the CP detection module 400 includes: a second protection unit 410; the second protection unit 410 is connected with the charging gun and the second wake-up module 500 respectively, for absorbing the surge voltage output by the charging gun, and for collecting the CP signal sent by the charging gun and sending it to the second wake-up module 500.

[0046] The second protection unit 410 can absorb the surge voltage output by the charging gun, thereby protecting the circuit connected to the rear of the second protection unit 410.

[0047] The second protection unit 410 includes: a second fuse F2, a second TVS tube T2 and a third diode D3; the first end of the second fuse F2 is connected with the charging gun, and the second end of the first fuse F1 is connected with the first end of the second TVS tube T2; the second end of the second TVS tube T2 is connected with the positive electrode of the third diode D3, and the third end of the second TVS tube T2 is grounded; the negative electrode of the third diode D3 is connected with the second wake-up module 500.

[0048] The second fuse F2 is used for fusing when overcurrent of the charging gun end output exceeds a fusing threshold of the second fuse F2, preventing overcurrent from flowing into the rear-stage connection circuit of the second protection unit 410; the second TVS tube T2 is used for clamping a surge voltage below a safe voltage when the surge voltage is generated at the charging gun end. Exemplarily, the safe voltage can be 28V. When the surge voltage exceeds 28V, the second TVS tube T2 can clamp the surge voltage below 28V, so that the voltage received by the second protection unit 410 is all below 28V, to protect the rear-stage connection circuit of the second protection unit 410. CP_WAKE_UP represents a connection end of the second wake-up module 500.

[0049] In some other embodiments of the present application, referring to Figure 3 As shown in the figure, the CP detection module 400 further comprises a duty cycle detection unit 420; the duty cycle detection unit 420 is connected with the second protection unit 410 and the master control chip 300 respectively, and is used for converting the CP signal into a duty cycle signal and sending the duty cycle signal to the master control chip 300.

[0050] The duty cycle detection unit 420 comprises an eleventh resistor R11, a twelfth resistor R12, a fourth diode D4, a fourth MOS tube Q4 and a thirteenth resistor R13; a first end of the eleventh resistor R11 is connected with a negative electrode of the third diode D3; a second end of the eleventh resistor R11 is connected with a first end of the twelfth resistor R12, a negative electrode of the fourth diode D4 and a gate of the fourth MOS tube Q4 respectively; a drain of the fourth MOS tube Q4 is connected with the master control chip 300 and a first end of the thirteenth resistor R13 respectively; a second end of the thirteenth resistor R13 is connected with the second power supply end VCC2; a second end of the twelfth resistor R12, a positive electrode of the fourth diode D4 and a source of the fourth MOS tube Q4 are connected and grounded.

[0051] The CP signal comprises a duty cycle signal, and the duty cycle signal can be output through the drain of the fourth MOS tube Q4. After the master control chip 300 receives the duty cycle signal, the current carrying size of the charging gun is obtained by multiplying the duty cycle of the duty cycle signal and a duty cycle coefficient. The current carrying capacity of the charging gun is determined according to the current carrying size of the charging gun, and the charging capacity of the charging gun is judged again. If the current carrying size of the charging gun does not match the charging power of the charging gun, the master control chip 300 will send a signal to prohibit charging. BATMCUI_CP_PWM_DET represents a connection end of the master control chip 300.

[0052] In some other embodiments of the present application, referring to Figure 3As shown, the CP detection module 400 further comprises a charging state detection unit 430; the charging state detection unit 430 is connected with the second protection unit 410 and the main control chip 300 respectively, and is configured to obtain a charging state signal according to a charging state switching signal and a CP signal sent by the main control chip 300, and send the charging state signal to the main control chip 300.

[0053] The charging state includes a charging state and a non-charging state, and the charging state of the charging gun is detected to determine whether the charging gun is charging.

[0054] The charging state detection unit 430 comprises a fourteenth resistor R14, a fifth MOS tube Q5, a fifth diode D5, a sixth diode D6, a fifteenth resistor R15, a sixteenth resistor R16, a fifth capacitor C5, a sixth MOS tube Q6, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a triode QS, a twenty-first resistor R21, a twenty-second resistor R22, a sixth capacitor C6, a twenty-third resistor R23, and a twenty-fourth resistor R24.

[0055] A first end of the fourteenth resistor R14 is connected with the second protection unit 410 and a positive electrode of the fifth diode D5 respectively, and a second end of the fourteenth resistor R14 is connected with a source electrode of the fifth MOS tube Q5; a gate electrode of the fifth MOS tube Q5 is connected with a negative electrode of the sixth diode D6, a first end of the fifteenth resistor R15, a first end of the sixteenth resistor R16, a first end of the fifth capacitor C5, and a source electrode of the sixth MOS tube Q6 respectively, and a drain electrode of the fifth MOS tube Q5 is connected with a positive electrode of the sixth diode D6, a second end of the fifteenth resistor R15, a second end of the fifth capacitor C5, a drain electrode of the sixth MOS tube Q6, and a second end of the seventeenth resistor R17 respectively and grounded; a second end of the sixteenth resistor R16 is connected with a negative electrode of the fifth diode D5; a gate electrode of the sixth MOS tube Q6 is connected with a first end of the seventeenth resistor R17 and a first end of the eighteenth resistor R18 respectively; a second end of the eighteenth resistor R18 is connected with the main control chip 300; a first end of the nineteenth resistor R19 is connected with the second protection unit 410 and a first end of the twentieth resistor R20 respectively, and a second end of the nineteenth resistor R19 is connected with an emitter electrode of the triode QS; a base electrode of the triode QS is connected with a first end of the twenty-first resistor R21 and a first end of the twenty-second resistor R22 respectively, and a collector electrode of the triode QS is connected with a second end of the twenty-second resistor R22, a second end of the sixth capacitor C6, and a second end of the twenty-third resistor R23 respectively and grounded; a second end of the twenty-first resistor R21 is connected with the main control chip 300; a second end of the twentieth resistor R20 is connected with a first end of the twenty-fourth resistor R24 and a first end of the sixth capacitor C6 respectively; and a second end of the twenty-fourth resistor R24 is connected with a first end of the twenty-third resistor R23 and the main control chip 300 respectively.

[0056] When the user charges by swiping the card, the CP signal sent by the charging gun includes the normal signal at the end of the pile, and the main control chip 300 can receive the normal signal at the end of the pile. For example, CPOUT_ENABLE represents a connection end of the main control chip 300, and the charging gun sends the normal signal at the end of the pile to the main control chip 300 through CPOUT_ENABLE; BATMCUI_CP_AVG represents a connection end of the main control chip 300, and the charging state signal representing the charging state is sent through BATMCUI_CP_AVG, and the main control chip 300 is based on the charging state signal; when the charging gun is in the uncharged state, the third resistor QS is in the cut-off state, the nineteenth resistor R19 and the twenty-second resistor R22 are in the parallel state with the twenty-fourth resistor R24 and the twenty-third resistor R23, and the voltage output by BATMCUI_CP_AVG is the first voltage value, for example, the first voltage value can be 9V; after swiping the card, when the main control chip 300 receives the normal signal at the end of the pile and the first voltage value, it sends a charging state switching signal, indicating that the vehicle enters the charging state, BATMCU0_CP_OK represents a connection end of the main control chip 300, and the main control chip 300 sends the charging state switching signal through BATMCU0_CP_OK, the third resistor QS is turned on after receiving the charging state switching signal, the nineteenth resistor R19 is connected in parallel with the twenty-fourth resistor R24 and the twenty-third resistor R23, and the voltage output by BATMCUI_CP_AVG is the second voltage value, for example, the second voltage value can be 6V, and the main control chip 300 receives the second voltage value to determine that the vehicle is in the charging state.

[0057] Figure 4 The structure diagram of another charging wake-up circuit provided by the example embodiment of the application is shown, please refer to Figure 4 As shown in the figure, the second wake-up module 500 includes a first amplification unit 510, a wake-up unit 520 and a second amplification unit 530; the first amplification unit 510 is connected with the second protection unit 410 and the wake-up unit 520 respectively, for amplifying the CP signal to obtain an amplified CP signal, and transmitting the amplified CP signal to the wake-up unit;

[0058] The wake-up unit 520 is connected with the second amplification unit 530, for converting the amplified CP signal into a second wake-up signal, and sending the second wake-up signal to the second amplification unit 530; the second amplification unit 530 is connected with the main control chip 300, for amplifying the second wake-up signal to obtain an amplified second wake-up signal, and sending the amplified second wake-up signal to the main control chip 300.

[0059] The CP signal is amplified by the first amplification unit, the amplified CP signal is matched with the receiving end of the wake-up unit 520, so that the wake-up unit 520 can receive the amplified CP signal, and the amplified CP signal is converted into a second wake-up signal; the second wake-up signal is amplified by the second amplification unit 530, so that the second wake-up signal can be matched with the receiving end of the main control chip 300, so that the main control chip 300 can receive the wake-up signal to wake up the charger, thereby waking up the whole vehicle for charging.

[0060] Please refer to Figure 4 As shown in the figure, the first wake-up module 200 includes a first amplification unit 210, a wake-up unit 220 and a second amplification unit 230; the first amplification unit 210 is connected with the first protection unit 110 and the wake-up unit 220 respectively, for amplifying the CC signal to obtain an amplified CC signal, and transmitting the amplified CC signal to the wake-up unit 220;

[0061] The wake-up unit 220 is connected with the second amplification unit 230, for converting the amplified CC signal into a first wake-up signal, and sending the first wake-up signal to the second amplification unit 230; the second amplification unit 230 is connected with the main control chip 300, for amplifying the first wake-up signal to obtain an amplified first wake-up signal, and sending the amplified first wake-up signal to the main control chip 300.

[0062] The CC signal is amplified by the first amplification unit 210, the amplified CC signal is matched with the receiving end of the wake-up unit 220, so that the wake-up unit 220 can receive the amplified CC signal, and the amplified CP signal is converted into a first wake-up signal; the second amplification unit 230 amplifies the first wake-up signal, so that the first wake-up signal can be matched with the receiving end of the main control chip 300, so that the main control chip 300 can receive the wake-up signal to wake up the charger, thereby waking up the whole vehicle. It should be noted that the first wake-up module 200 is the same as the second wake-up module 500, but not the same wake-up module.

[0063] Figure 5 A circuit diagram of a first amplification unit provided by an exemplary embodiment of the present application is shown, please refer to Figure 5As shown, the first amplification unit includes the twenty-fifth resistor R25, the seventh diode D7, the twenty-sixth resistor R26, the seventh MOS Q7 and the twenty-seventh resistor R27; the first end of the twenty-fifth resistor R25 is connected with the second protection unit 410, the second end of the twenty-fifth resistor R25 is connected with the negative pole of the seventh diode D7, the first end of the twenty-sixth resistor R26 and the gate of the seventh MOS Q7 respectively; the source of the seventh MOS Q7 is connected with the positive pole of the seventh diode D7 and the second end of the twenty-sixth resistor R26 respectively and grounded; the drain of the seventh MOS Q7 is connected with the wake-up unit and the first end of the twenty-seventh resistor R27 respectively; the second end of the twenty-seventh resistor R27 is connected with the third power supply end.

[0064] Wherein, the CP signal is received through the first end of the twenty-fifth resistor R25, that is, the CP signal is received through the connection end CP_WAKE_UP, and after the CP signal is amplified through the seventh MOS Q7, the amplified CP signal is output through the drain of the seventh MOS Q7, that is, the amplified CP signal is transmitted to the wake-up unit through the connection end PIC_CP_DET. PIC_3V3 represents the third power supply end VCC3, and the size of the third power supply end VCC3 can be 3.3V.

[0065] Figure 6 A circuit diagram of the wake-up chip provided by the exemplary embodiment of the present application is shown, please refer to Figure 6 As shown, the first amplification unit 510 receives the amplified CP signal through the connection end PIC_CP_DET of the wake-up chip 520, converts the amplified CP signal into the second wake-up signal, and transmits the second wake-up signal 530 to the second amplification unit through the connection end PIC_SINK of the wake-up chip 520.

[0066] Figure 7 A circuit diagram of the second amplification unit provided by the exemplary embodiment of the present application is shown, please refer to Figure 7 As shown, the second amplification unit includes the twenty-eighth resistor R28, the seventh capacitor C7, the eighth diode D8, the eighth capacitor C8, the twenty-ninth resistor R29, the seventh MOS Q7, the thirtieth resistor R30 and the ninth capacitor C9.

[0067] The first end of the twenty-eighth resistor R28 is connected with the wake-up chip, and the second end of the twenty-eighth resistor R28 is connected with the first end of the seventh capacitor C7; the second end of the seventh capacitor C7 is connected with the negative electrode of the eighth diode D8, the first end of the eighth capacitor C8, the first end of the twenty-ninth resistor R29 and the gate of the seventh MOS Q7 respectively; the positive electrode of the eighth diode D8 is connected with the second end of the eighth capacitor C8, the second end of the twenty-ninth resistor R29 and the source of the seventh MOS Q7 respectively and grounded, the drain of the seventh MOS Q7 is connected with the first end of the thirtieth resistor R30 and the first end of the ninth capacitor C9 respectively, and the second end of the thirtieth resistor R30 is connected with the second end of the ninth capacitor C9 and the main control chip 300 respectively.

[0068] The first end of the twenty-eighth resistor R28 receives the amplified second wake-up signal, that is, the connection end PIC SINK, and the seventh MOS Q7 amplifies the second wake-up signal to obtain the amplified second wake-up signal, and the second end of the thirtieth resistor R30, that is, the connection end CCCP SINK, transmits the amplified second wake-up signal to the main control chip 300.

[0069] It should be noted that the circuit structure of the first wake-up module 200 is the same as that of the second wake-up module 500, the transmission flow direction of the CC signal in the first wake-up module 200 is the same as that of the CP signal in the second wake-up module 500, the CC signal is converted into the second wake-up signal and transmitted to the main control chip 300, and the principle is the same as that of the first wake-up module 200.

[0070] Figure 8 A circuit diagram of a voltage conversion module provided by an example embodiment of the present application is shown, please refer to Figure 8 As shown in the figure, the voltage module is connected with the battery and the wake-up unit 520 respectively, and is used to convert the first power supply voltage output by the battery into the second power supply voltage to provide the second power supply voltage for the wake-up unit 520. Wherein, VCC BUS is the connection end with the battery, and the size of the first power supply voltage can be 12V, PIC 3V3 is the connection end with the wake-up unit 520, and the size of the second power supply voltage can be 3.3V.

[0071] The above is only a preferred example embodiment of the present application, not for limiting the implementation of the present application, and those skilled in the art can easily make corresponding changes or modifications according to the main idea and spirit of the present application, so the protection scope of the present application should be subject to the protection scope required by the claims.

Claims

1. A charge wake-up circuit, characterized by, The circuit comprises a CC detection module, a first wake-up module, a master control chip, a CP detection module and a second wake-up module; The CC detection module is connected with the charging gun and the first wake-up module respectively, and is used for detecting the CC signal emitted by the charging gun and sending the CC signal to the first wake-up module; The first wake-up module is connected with the master control chip, and is used for converting the CC signal into a first wake-up signal and sending the first wake-up signal to the master control chip; The CP detection module is connected with the charging gun and the second wake-up module respectively, and is used for detecting the CP signal emitted by the charging gun and sending the CP signal to the second wake-up module; The second wake-up module is connected with the master control chip, and is used for converting the CP signal into a second wake-up signal and sending the second wake-up signal to the master control chip; The master control chip is used for waking up the vehicle to charge according to the first wake-up signal or the second wake-up signal.

2. The circuit of claim 1, wherein, The CC detection module comprises a first protection unit and a wake-up detection unit; The first protection unit is connected with the charging gun and the wake-up detection unit respectively, and is used for absorbing the inrush voltage output by the charging gun and collecting the CC signal emitted by the charging gun and sending the CC signal to the wake-up detection unit; The wake-up detection unit is connected with the master control chip, and is used for sending the CC signal to the first wake-up module.

3. The circuit of claim 2, wherein, The first protection unit comprises a first fuse, a first TVS tube and a first resistor; The first end of the first fuse is connected with the charging gun, and the second end of the first fuse is connected with the first end of the first TVS tube; The second end of the first TVS tube is connected with the first end of the first resistor, and the third end of the first TVS tube is grounded; The second end of the first resistor is connected with the wake-up detection unit.

4. The circuit of claim 3, wherein, The wake-up detection unit comprises a second resistor, a third resistor, a first capacitor, a first diode, a first MOS tube, a fourth resistor and a second capacitor; The first end of the second resistor is connected with the first end of the first resistor and the first end of the second capacitor, and the second end of the second resistor is connected with the first end of the third resistor, the first end of the first capacitor, the negative electrode of the first diode, a storage battery and the drain of the first MOS tube respectively; The second end of the third resistor is connected with the second end of the first capacitor, the positive electrode of the first diode, the gate of the first MOS tube and the first end of the fourth resistor respectively; The source of the first MOS tube is connected with the first wake-up module; The second end of the fourth resistor is connected with the master control chip and the second end of the second capacitor respectively.

5. The circuit of claim 2, wherein, The CC detection module further comprises a power detection unit, and the power detection unit is connected with the first protection unit and the master control chip respectively; The power detection unit comprises a second MOS tube, a fifth resistor, a sixth resistor, a seventh resistor, a third capacitor, an eighth resistor, a second diode, a third MOS tube, a fourth capacitor, a ninth resistor, a tenth resistor and a fifth capacitor; The gate of the second MOS tube is connected with the first end of the fifth resistor, the first end of the sixth resistor and the master control chip respectively, the drain of the second MOS tube is connected with the first protection unit and the drain of the third MOS tube respectively, and the source of the second MOS tube is connected with the first end of the seventh resistor; The second end of the fifth resistor is connected with the first power supply end, the first end of the third capacitor and the first end of the eighth resistor respectively; The second end of the sixth resistor is connected with the second power supply end, the second end of the seventh resistor and the negative electrode of the second diode respectively; The second end of the third capacitor is grounded; The gate of the third MOS tube is connected with the second end of the eighth resistor, the first end of the fourth capacitor, the first end of the ninth resistor and the master control chip respectively, the source of the third MOS tube is connected with the second end of the fourth capacitor, the positive electrode of the second diode and the first end of the tenth resistor respectively; The second end of the tenth resistor is connected with the master control chip and the first end of the fifth capacitor respectively; The second end of the ninth resistor is connected with the second end of the fifth capacitor and grounded.

6. The circuit of claim 3, wherein, The CP detection module comprises a second protection unit; The second protection unit is connected with the charging gun and the second wake-up module respectively, is used for absorbing the inrush voltage output by the charging gun, and is also used for collecting the CP signal sent by the charging gun and sending the CP signal to the second wake-up module; The second protection unit comprises a second fuse, a second TVS tube and a third diode; The first end of the second fuse is connected with the charging gun, and the second end of the first fuse is connected with the first end of the second TVS tube; The second end of the second TVS tube is connected with the positive electrode of the third diode, and the third end of the second TVS tube is grounded; The negative electrode of the third diode is connected with the second wake-up module.

7. The circuit of claim 6, wherein, The CP detection module further comprises a duty cycle detection unit; The duty cycle detection unit is connected with the second protection unit and the master control chip respectively, is used for converting the CP signal into a duty cycle signal and sending the duty cycle signal to the master control chip; The duty cycle detection unit comprises an eleventh resistor, a twelfth resistor, a fourth diode, a fourth MOS tube and a thirteenth resistor; The first end of the eleventh resistor is connected with the negative electrode of the third diode, and the second end of the eleventh resistor is connected with the first end of the twelfth resistor, the negative electrode of the fourth diode and the gate of the fourth MOS tube respectively; The drain of the fourth MOS tube is connected with the master control chip and the first end of the thirteenth resistor respectively; The second end of the thirteenth resistor is connected with the second power supply end; The second end of the twelfth resistor, the positive electrode of the fourth diode and the source of the fourth MOS tube are connected and grounded.

8. The circuit of claim 6, wherein, The CP detection module further comprises a charging state detection unit; The charging state detection unit is connected with the second protection unit and the master control chip respectively, is used for obtaining a charging state signal according to the charging state switching signal sent by the master control chip and the CP signal, and sending the charging state signal to the master control chip; The charging state detection unit comprises a fourteenth resistor, a fifth MOS tube, a fifth diode, a sixth diode, a fifteenth resistor, a sixteenth resistor, a fifth capacitor, a sixth MOS tube, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a triode, a twenty-first resistor, a twenty-second resistor, a sixth capacitor, a twenty-third resistor and a twenty-fourth resistor; First ends of the fourteenth resistor are connected with positive poles of the second protection unit and the fifth diode respectively, and a second end of the fourteenth resistor is connected with a source of the fifth MOS tube; A gate of the fifth MOS tube is connected with a negative pole of the sixth diode, a first end of the fifteenth resistor, a first end of the sixteenth resistor, a first end of the fifth capacitor and a source of the sixth MOS tube respectively, and a drain of the fifth MOS tube is connected with a positive pole of the sixth diode, a second end of the fifteenth resistor, a second end of the fifth capacitor, a drain of the sixth MOS tube and a second end of the seventeenth resistor and grounded; A second end of the sixteenth resistor is connected with a negative pole of the fifth diode; A gate of the sixth MOS tube is connected with a first end of the seventeenth resistor and a first end of the eighteenth resistor respectively; A second end of the eighteenth resistor is connected with the master control chip; First ends of the nineteenth resistor are connected with the second protection unit and a first end of the twentieth resistor respectively, and a second end of the nineteenth resistor is connected with an emitter of the triode; A base of the triode is connected with a first end of the twenty-first resistor and a first end of the twenty-second resistor respectively, and a collector of the triode is connected with a second end of the twenty-second resistor, a second end of the sixth capacitor and a second end of the twenty-third resistor and grounded; A second end of the twenty-first resistor is connected with the master control chip; Second ends of the twentieth resistor are connected with a first end of the twenty-fourth resistor and a first end of the sixth capacitor respectively; A second end of the twenty-fourth resistor is connected with a first end of the twenty-third resistor and the master control chip respectively.

9. The circuit of claim 6, wherein, The second wake-up module comprises a first amplification unit, a wake-up unit and a second amplification unit; The first amplification unit is connected with the second protection unit and the wake-up unit respectively, and is used for amplifying the CP signal to obtain an amplified CP signal and transmitting the amplified CP signal to the wake-up unit; The wake-up unit is connected with the second amplification unit, and is used for converting the amplified CP signal into a second wake-up signal and sending the second wake-up signal to the second amplification unit; The second amplification unit is connected with the master control chip, and is used for amplifying the second wake-up signal to obtain an amplified second wake-up signal and sending the amplified second wake-up signal to the master control chip.

10. The circuit of claim 9, wherein, The first amplification unit comprises a twenty-fifth resistor, a seventh diode, a twenty-sixth resistor, a seventh MOS tube and a twenty-seventh resistor; A first end of the twenty-fifth resistor is connected with the second protection unit, and second ends of the twenty-fifth resistor are connected with a negative pole of the seventh diode, a first end of the twenty-sixth resistor and a gate of the seventh MOS tube respectively; The source of the seventh MOS is connected with the anode of the seventh diode and the second end of the twenty-sixth resistance respectively and grounded; The drain of the seventh MOS is connected with the wake-up unit and the first end of the twenty-seventh resistance respectively; The second end of the twenty-seventh resistance is connected with the third power supply end.

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