Charging wake-up circuit of electric vehicle and electric vehicle

Abstract

The utility model discloses a charging wake-up circuit of an electric automobile and the electric automobile. Relates to the field of electric vehicles, and comprises a trigger unit which is connected with an output end of a charging gun of a charging pile and an input end of an awakening unit, the trigger unit comprises a first NMOS tube, a grid electrode of the first NMOS tube is connected with a charging connection confirmation port of the charging gun, a drain electrode of the first NMOS tube is connected with a control confirmation port of the charging gun, a source electrode of the first NMOS tube is connected with a ground end, and an output end of the awakening unit is connected with an output end of the charging gun; a charging connection confirmation signal of the charging connection confirmation port is output to the grid electrode of the first NMOS tube so as to conduct a circuit between the drain electrode and the source electrode of the first NMOS tube; and the awakening unit is connected with the triggering unit and the battery management system and is used for outputting the charging connection confirmation signal to a power supply awakening port of the battery management system. According to the utility model, the technical problem that the battery management system of the electric automobile cannot support the charging reservation function in the dormant state in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric automobile field, specifically, it relates to a kind of charging wake-up circuit and electric automobile of electric automobile. BACKGROUND

[0002] The battery management system (Battery Management System, BMS) of electric automobile is often focused on the charge and discharge management, state monitoring and fault diagnosis of battery in design, to ensure the safety of battery and prolong its service life. However, with the continuous progress of electric vehicle charging technology and the update of charging standard, the charging management of BMS needs to adapt to the needs of more application scenarios. The charging reservation function is a new demand, which is an intelligent charging method, which allows the owner to set the start time of the charging pile in advance, so as to carry out automatic charging. However, the battery management system of electric vehicle in the related art cannot support the charging reservation function in the sleep state.

[0003] For the above problems, no effective solution has been proposed so far. UTILITY MODEL CONTENT

[0004] The utility model embodiment provides a kind of charging wake-up circuit and electric automobile of electric automobile, to at least solve the technical problem that the battery management system of electric vehicle in the related art cannot support charging reservation function in sleep state.

[0005] According to an aspect of the utility model embodiment, a charging wake-up circuit of electric vehicle is provided, comprising: a trigger unit connected to the output end of the charging gun of the charging pile and the input end of the wake-up unit, the trigger unit includes a first NMOS tube, the gate of the first NMOS tube is connected to the charging connection confirmation port of the charging gun, the drain of the first NMOS tube is connected to the control confirmation port of the charging gun, the source of the first NMOS tube is connected to the ground, and the charging connection confirmation signal of the charging connection confirmation port is output to the gate of the first NMOS tube to turn on the circuit between the drain and the source of the first NMOS tube; the wake-up unit is connected to the trigger unit and the battery management system, and is used to output the charging connection confirmation signal to the power wake-up port of the battery management system.

[0006] Further, the trigger unit further includes: a first resistor connected between the input end of the trigger unit and the gate of the first NMOS tube.

[0007] Further, the gate of the first NMOS tube is also connected to the first signal output end of the battery management system.

[0008] Further, the wake-up unit comprises: an NPN triode, a collector of the NPN triode being connected with the target power supply, an emitter of the NPN triode being connected with a power supply wake-up port of the battery management system, a base of the NPN triode being connected with a collector of a PNP triode; the PNP triode, an emitter of the PNP triode being connected with an input end of the wake-up unit, a collector of the PNP triode being connected with the base of the NPN triode, a base of the PNP triode being connected with a ground end through a first capacitor.

[0009] Further, the wake-up unit comprises: a first diode, a positive electrode of the first diode being connected with a base of a PNP triode, a negative electrode of the first diode being connected with an emitter of the PNP triode; a second resistor, one end of the second resistor being connected with the base of the PNP triode, the other end of the second resistor being connected with a ground end.

[0010] Further, the wake-up unit comprises: a third resistor, one end of the second resistor being connected with the base of the PNP triode, the other end of the third resistor being connected with the first capacitor.

[0011] Further, the charging wake-up circuit of the electric vehicle further comprises: a detection unit, the detection unit being connected with the trigger unit, and being configured to output a charging connection confirmation signal to a charging connection detection port of the battery management system.

[0012] Further, the detection unit comprises: a first voltage dividing resistor, one end of the first voltage dividing resistor being connected with an output end of the trigger unit, the other end of the first voltage dividing resistor being connected with the charging connection detection port of the battery management system and one end of a second voltage dividing resistor; the second voltage dividing resistor, the other end of the second voltage dividing resistor being connected with a ground end.

[0013] Further, the detection unit comprises: a filter capacitor, one end of the filter capacitor being connected with the charging connection detection port of the battery management system, the other end of the filter capacitor being connected with a ground end of the battery management system.

[0014] According to another aspect of the embodiment of the utility model, a kind of electric vehicle is further provided, and electric vehicle includes the charging wake-up circuit of the electric vehicle described above.

[0015] In the embodiment of the utility model, through setting up the gate of the first NMOS pipe and the charging connection confirmation port of the charging gun connection, when the charging gun is inserted into the electric vehicle, the charging connection confirmation signal of the charging connection confirmation port of the charging gun can be output to the gate of the first NMOS pipe, the drain and the source of the first NMOS pipe are turned on, that is, the automatic conduction of the first NMOS pipe is realized when the electric vehicle is in the gun insertion state, and the battery management system control is not needed, so that the first NMOS pipe can be closed in the sleep state of the battery management system, the charging standard of GBT18487.1-2023 is met, and the battery management system can support the charging reservation function in the sleep state, and the battery management system power consumption is reduced.

[0016] Therefore, the scheme provided in the application achieves the purpose of turning on the first NMOS pipe based on the signal output by the charging gun in the sleep state of the battery management system, thereby achieving the technical effect that the battery management system can support the charging reservation function in the sleep state, and further solving the problem that the battery management system of the electric vehicle cannot support the charging reservation function in the sleep state in the related art. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are included to provide a further understanding of the utility model, form a part of the application and help to explain the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation on the utility model. In the drawings:

[0018] Figure 1 is a schematic diagram of an optional charging wake-up circuit according to the embodiment of the utility model;

[0019] Figure 2 is a schematic diagram of an optional charging wake-up circuit in the related art. DETAILED DESCRIPTION

[0020] In order for those skilled in the art to better understand the utility model scheme, the technical scheme in the embodiment of the utility model will be described clearly and completely below in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the utility model.

[0021] It should be noted that the terms "first", "second", and the like in the description and claims of the utility model and the above drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to the clearly listed steps or units, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0022] Embodiment 1

[0023] Figure 1 is an optional charging wake-up circuit according to an embodiment of the utility model, as shown in Figure 1 The charging wake-up circuit of the electric vehicle includes:

[0024] The trigger unit 10 is connected with the output end of the charging gun of the charging pile and the input end of the wake-up unit 20, and the trigger unit 10 includes a first NMOS tube, the gate of the first NMOS tube is connected with the charging connection confirmation port of the charging gun, the drain of the first NMOS tube is connected with the control confirmation port of the charging gun, the source of the first NMOS tube is connected with the ground end, and the charging connection confirmation signal of the charging connection confirmation port is output to the gate of the first NMOS tube to turn on the circuit between the drain and the source of the first NMOS tube.

[0025] The wake-up unit 20 is connected with the trigger unit 10 and the battery management system, and is used for outputting the charging connection confirmation signal to the power wake-up port of the battery management system.

[0026] Optionally, Figure 2 is an optional charging wake-up circuit in the related art, as shown in Figure 2 The charging wake-up circuit in Figure 2 includes a first NMOS tube S2', based on the charging standard of GBT18487.1-2023, the first NMOS tube S2' is a vehicle internal control guide circuit switch, the gate of the first NMOS tube S2' is connected with the first signal output end MCU_CC1_SW2 of the battery management system, the drain of the first NMOS tube S2' is connected with the control confirmation port of the charging gun, and the source of the first NMOS tube is connected with the ground end, Figure 2The conduction and cutoff of the first NMOS transistor S2' shown are controlled by a signal output from the first signal output terminal of the BMS. According to the charging standard GBT18487.1-2023, the first NMOS transistor S2' is required to remain closed in the charging gun sleep state to meet the control state requirements of the charging reservation function. However, in related technologies, the conduction and cutoff of the first NMOS transistor S2' can only be controlled by a signal output from the first signal output terminal of the BMS. Therefore, this means that when the BMS is in sleep mode, it cannot output a signal to control the first NMOS transistor S2' to conduct, and thus the scheduled charging function cannot be implemented.

[0027] Optional, based on the charging standard GB / T18487.1-2023, Figure 2 The second NMOS transistor S2 is also a switch in the vehicle's internal control guidance circuit. The gate of the second NMOS transistor S2 is connected to the second signal output terminal MCU_CC1_SW1 of the battery management system, the drain of the second NMOS transistor S2 is connected to the control confirmation port of the charging gun, and the source of the second NMOS transistor S2 is connected to ground. Figure 2 The conduction and cutoff of the second NMOS transistor S2 shown are controlled by a signal output from the second signal output terminal of the BMS. Optionally, in Figure 2 In the process, the charging connection confirmation signal CC1 output by the charging gun's charging connection confirmation port is output to the power wake-up port CC1_WK of the BMS through the second diode D2 to wake up the BMS.

[0028] based on Figure 2 The charging wake-up circuit shown cannot support the charging reservation function in the BMS's sleep state. In this embodiment, as... Figure 1 As shown, the gate of the first NMOS transistor S2' is connected to the charging connection confirmation port of the charging gun. Therefore, when the electric vehicle is plugged into the charging gun, the charging connection confirmation signal CC1 from the charging gun's charging connection confirmation port is output to the gate of the first NMOS transistor S2' via the second diode D2, thus enabling conduction between the drain and source of the first NMOS transistor. This achieves automatic conduction of the first NMOS transistor S2' when the charging gun is plugged in, without requiring BMS control, thereby achieving the closure of the first NMOS transistor S2' in the BMS sleep state. Wherein, as... Figure 1 As shown, in this embodiment, the positive terminal of the second diode D2 serves as the input terminal of the trigger unit 10, and the negative terminal of the second diode D2 is connected to the gate of the first NMOS transistor S2'.

[0029] Optional, based on the charging standard GB / T18487.1-2023, Figure 1 The first NMOS transistor S2' in the circuit is the switch for the vehicle's internal control and guidance circuit.

[0030] Optional, based on the charging standard GB / T18487.1-2023, Figure 1 The second NMOS transistor S2 is also a switch in the vehicle's internal control guidance circuit. The gate of the second NMOS transistor S2 is connected to the second signal output terminal MCU_CC1_SW1 of the battery management system, the drain of the second NMOS transistor S2 is connected to the control confirmation port of the charging gun, and the source of the second NMOS transistor S2 is connected to ground. Figure 1 The conduction and cutoff of the second NMOS transistor S2 shown are controlled by a signal output from the second signal output terminal of the BMS. Optionally, in Figure 1 In the process, the charging connection confirmation signal CC1 output by the charging gun's charging connection confirmation port is output to the power wake-up port CC1_WK of the BMS through the second diode D2 to wake up the BMS.

[0031] Optional, such as Figure 1 As shown, the charging wake-up circuit in this embodiment further includes a wake-up unit 20, which is connected to the trigger unit 10 and the battery management system, and is used to output a charging connection confirmation signal to the power wake-up port of the battery management system. Figure 1 As shown, the input terminal of the wake-up unit 20 is connected to the negative terminal of the second diode D2. The charging connection confirmation signal CC1 of the charging gun's charging connection confirmation port is output to the wake-up unit 20 through the second diode D2. Then, the wake-up unit 20 outputs the charging connection confirmation signal CC1 to the power wake-up port CC1_WK of the battery management system to wake up the BMS.

[0032] In one optional embodiment, when the charging gun is inserted into the charging port of the electric vehicle, the first NMOS transistor S2' in the charging wake-up circuit is turned on. When the electric vehicle is in a sleep state, the second signal output terminal MCU_CC1_SW1 of the battery management system is floating, and the first NMOS transistor S2' can still be in the on state (i.e., closed state). When the user's scheduled charging time arrives, the charging pile can change the charging connection confirmation signal CC1 so that the BMS can be woken up from the sleep state by the charging connection confirmation signal CC1, thereby charging the electric vehicle.

[0033] In the embodiment, by connecting the gate of the first NMOS tube with the charging connection confirmation port of the charging gun, when the electric vehicle is inserted from the charging gun, the charging connection confirmation signal of the charging connection confirmation port of the charging gun can be output to the gate of the first NMOS tube, so that the drain and the source of the first NMOS tube are turned on, that is, the automatic conduction of the first NMOS tube is realized when the electric vehicle is in the plug-in state, without the control of the battery management system, so that the first NMOS tube can be closed in the sleep state of the battery management system, meet the charging standard of GBT18487.1-2023, and then the battery management system in the sleep state can support the charging reservation function, and the power consumption of the battery management system is reduced.

[0034] Therefore, the scheme provided in the application achieves the purpose of turning on the first NMOS tube based on the signal output by the charging gun in the sleep state of the battery management system, thereby realizing the technical effect that the battery management system in the sleep state can support the charging reservation function, and then solving the problem that the battery management system of the electric vehicle in the sleep state cannot support the charging reservation function in the related art.

[0035] In an optional embodiment, the trigger unit 10 further includes a first resistor connected between the input end of the trigger unit 10 and the gate of the first NMOS tube.

[0036] Optionally, as shown in Figure 1 one end of the first resistor R4 is connected with the input end of the trigger unit 10, specifically, the first resistor R4 is connected with the negative electrode of the second diode D2, and the other end of the first resistor R4 is connected with the gate of the first NMOS tube S2'.

[0037] It should be noted that by adding the first resistor R4 between the second diode D2 and the gate of the first NMOS tube S2', the influence of the transient fluctuation of the charging connection confirmation signal CC1 on the first NMOS tube S2' can be effectively prevented, thereby improving the stability and reliability of the circuit.

[0038] In an optional embodiment, the gate of the first NMOS tube is further connected with a first signal output end of the battery management system.

[0039] Optionally, as shown in Figure 1As shown, the gate of the first NMOS transistor S2' is connected to the first signal output terminal MCU_CC1_SW2. When the electric vehicle is in the plug-in state, the BMS can pull down the gate level of the first NMOS transistor S2' through the first signal output terminal MCU_CC1_SW2 to disconnect the first NMOS transistor S2'. When the electric vehicle is not in the plug-in state, the BMS can pull up or down the gate level of the first NMOS transistor S2' through the first signal output terminal MCU_CC1_SW2 to turn the first NMOS transistor S2' on or off.

[0040] It should be noted that the above circuit structure enables effective control of the first NMOS transistor S2' through the BMS, thereby improving the control effectiveness of the first NMOS transistor S2'.

[0041] In one alternative embodiment, such as Figure 1 As shown, the trigger unit 10 also includes a capacitor C1, a bidirectional Zener diode D1, resistors R1, R2, R3, R5, and R6. One end of capacitor C1 is connected to the positive terminal of the second diode D2, and the other end of capacitor C1 is grounded. The bidirectional Zener diode D1 is connected in parallel with capacitor C1. Resistor R1 is connected between the gate of the second NMOS transistor S2 and the second signal output terminal MCU_CC1_SW1. One end of resistor R2 is connected to the gate of the second NMOS transistor S2, and the other end of resistor R2 is grounded. One end of resistor R3 is connected to the negative terminal of the second diode D2, and the other end of resistor R3 is connected to the drain of the second NMOS transistor S2. One end of resistor R6 is connected to the gate of the first NMOS transistor S2', and the other end of resistor R6 is grounded. One end of resistor R5 is connected to the negative terminal of the second diode D2, and the other end of resistor R5 is connected to the drain of the first NMOS transistor S2'.

[0042] It should be noted that the stability of the charging wake-up circuit can be further improved through the above circuit structure.

[0043] In one optional embodiment, the wake-up unit 20 includes: an NPN transistor, the collector of which is connected to a target power supply, the emitter of which is connected to the power wake-up port of the battery management system, and the base of which is connected to the collector of a PNP transistor; and a PNP transistor, the emitter of which is connected to the input terminal of the wake-up unit 20, the collector of which is connected to the base of the NPN transistor, and the base of which is connected to ground through a first capacitor.

[0044] Optionally, the target power source is the power source in the electric vehicle, such as... Figure 1As shown, the collector of the NPN transistor Q4 is connected with the output end KL30 of the target power supply. The emitter of the NPN transistor Q4 is connected with the power supply wake-up port CC1_WK of the battery management system, and the base of the NPN transistor Q4 is connected with the collector of the PNP transistor Q3.

[0045] Optionally, as shown in FIG. 1, the battery management system further comprises a trigger unit 10 and a wake-up unit 20. Figure 1 As shown, the emitter of the PNP transistor Q3 is connected with the input end of the wake-up unit 20, the collector of the PNP transistor Q3 is connected with the base of the NPN transistor Q4, and the base of the PNP transistor Q3 is connected with the ground end through the first capacitor C3.

[0046] Optionally, in the application process, the charging connection confirmation signal CC1 is output to the wake-up unit 20 through the trigger unit 10, the PNP transistor Q3 in the wake-up unit 20 receives the charging connection confirmation signal CC1 and is turned on, and then the charging connection confirmation signal CC1 is transmitted to the base of the NPN transistor Q4 to turn on the NPN transistor Q4, so that the signal of the output end KL30 of the target power supply can be output to the power supply wake-up port CC1_WK of the battery management system, thereby realizing the wake-up of the battery management system. Since the base of the PNP transistor Q3 is connected with the ground end through the first capacitor C3, during the period when the PNP transistor Q3 is turned on, the first capacitor C3 is charged, and the level of the base of the PNP transistor Q3 is pulled high, so that the PNP transistor Q3 is turned off, thereby realizing the conversion of the high-level wake-up of the charging connection confirmation signal CC1 through the circuit to the rising edge wake-up. After the battery management system is woken up, the battery management system can output a holding signal to itself through the MCU_EN port of the battery management system to maintain the working state, thereby avoiding the influence of the turn-off of the PNP transistor Q3 on the battery management system, and the battery management system can determine the next sleep time by itself, without being affected by the state of the charging gun.

[0047] It should be noted that through the above circuit structure, the high-level wake-up of the charging connection confirmation signal CC1 through the circuit is converted to the rising edge wake-up, so that the battery management system can realize the sleep function in the state of the charging gun being inserted.

[0048] In an optional embodiment, the wake-up unit 20 further comprises a first diode, a positive electrode of the first diode is connected with the base of the PNP transistor, and a negative electrode of the first diode is connected with the emitter of the PNP transistor; and a second resistor, one end of the second resistor is connected with the base of the PNP transistor, and the other end of the second resistor is connected with the ground end.

[0049] As shown in FIG. 1, the battery management system further comprises a trigger unit 10 and a wake-up unit 20. Figure 1As shown, the positive pole of the first diode D3 is connected with the base of the PNP transistor Q3, the negative pole of the first diode is connected with the emitter of the PNP transistor Q3, one end of the second resistor R9 is connected with the base of the PNP transistor Q3, and the other end of the second resistor R9 is connected to the ground terminal GND.

[0050] Optionally, after the first capacitor C3 is fully charged, the first capacitor can be discharged through the second resistor R9 and the first diode D3, so that the battery management system can be woken up again by the charging connection confirmation signal CC1 output by the charging gun in the state of inserting the charging gun. Wherein, the charging pile can control the charging connection confirmation signal CC1 output by the charging gun to be low in the case that the scheduled charging time point is not reached, and to be high or a PWM signal in the case that the scheduled charging time point is reached, so as to realize the wake-up of the battery management system.

[0051] It should be noted that through the above circuit structure, the discharge processing of the first capacitor C3 can be realized, so that the battery management system can realize the wake-up function in the state of inserting the charging gun.

[0052] In an optional embodiment, the wake-up unit 20 further comprises a third resistor, one end of the second resistor is connected with the base of the PNP transistor, and the other end of the third resistor is connected with the first capacitor.

[0053] Optionally, as shown in Figure 1 As shown, one end of the third resistor R11 is connected with the base of the PNP transistor Q3, and the other end of the third resistor R11 is connected with the capacitor C3, that is, the third resistor R11 is connected between the base of the PNP transistor Q3 and the first capacitor C3.

[0054] It should be noted that through the above circuit structure, the size of the charging current of the first capacitor C3 can be effectively controlled, so as to realize the effect of the protection circuit.

[0055] In an optional embodiment, as shown in Figure 1 The wake-up unit 20 further comprises a resistor R7, a resistor R12 and a resistor R13, wherein one end of the resistor R7 serves as an input terminal of the wake-up unit 20, the other end of the resistor R7 is connected with the emitter of the PNP transistor Q3, one end of the resistor R12 is connected with the collector of the PNP transistor Q3, the other end of the resistor R12 is connected with the base of the NPN transistor Q4, one end of the resistor R13 is connected with the base of the NPN transistor Q4, and the other end of the resistor R14 is grounded.

[0056] It should be noted that through the above circuit structure, the stability of the charging wake-up circuit can be further improved.

[0057] In an optional embodiment, the charging wake-up circuit of the electric vehicle further comprises a detection unit 30 connected to the trigger unit 10, configured to output the charging connection confirmation signal to a charging connection detection port of the battery management system.

[0058] Optionally, as shown in Figure 2 , an input end of the detection unit 30 is connected to the negative electrode of the second diode D2 in the trigger unit 10, and an output end of the detection unit 30 is connected to the charging connection detection port MCU_CC1_ADC of the battery management system. The detection unit 30 is configured to output the charging connection confirmation signal CC1 to the charging connection detection port of the battery management system, so that the battery management system can detect the charging connection confirmation signal CC1 and determine the state information of the charging connection confirmation signal CC1.

[0059] It should be noted that the above circuit structure enables the battery management system to effectively detect the charging connection confirmation signal CC1.

[0060] In an optional embodiment, the detection unit 30 comprises a first voltage dividing resistor, one end of the first voltage dividing resistor is connected to the output end of the trigger unit 10, and the other end of the first voltage dividing resistor is connected to one end of a second voltage dividing resistor and the charging connection detection port of the battery management system; and the second voltage dividing resistor has the other end connected to the ground end.

[0061] Optionally, as shown in Figure 2 , the negative electrode of the second diode D2 in the trigger unit 10 corresponds to the output end of the trigger unit 10, one end of the first voltage dividing resistor R8 is connected to the negative electrode of the second diode D2, the other end of the first voltage dividing resistor R8 is connected to the charging connection detection port MCU_CC1_ADC of the battery management system and one end of the second voltage dividing resistor R14, and the other end of the second voltage dividing resistor R14 is connected to the ground end GND.

[0062] It should be noted that the input voltage of the charging connection confirmation signal CC1 is at most 12V, which cannot be directly input to the BMS for detection, and an additional resistance voltage dividing circuit is required. For example, as shown in Figure 2 , in the related art, the resistance R7 with a resistance value of 100K in Figure 1 is used for voltage division. However, the charging gun and the BMS need to jointly detect the charging connection confirmation signal CC1, and cannot interfere with each other, Figure 1 The resistance R7 used for voltage division in may affect the detection voltage of the charging gun, and in the present application, by removing the voltage dividing resistor R7 and replacing it with the first voltage dividing resistor R8 and the second voltage dividing resistor R14, the influence on the detection of the charging connection confirmation signal CC1 on the charging gun side can be effectively avoided, thereby improving the reliability of the circuit.

[0063] In an optional embodiment, the detection unit 30 comprises a filtering capacitor, one end of the filtering capacitor is connected with the charging connection detection port of the battery management system, and the other end of the filtering capacitor is connected with the ground end of the battery management system.

[0064] Optionally, as shown in ​ one end of the filtering capacitor C2 is connected with the charging connection detection port MCU_CC1_ADC of the battery management system, and the other end of the filtering capacitor C2 is connected with the ground end GND of the battery management system.

[0065] It should be noted that through the above circuit structure, the filtering effect can be effectively realized, thereby facilitating to improve the detection accuracy of the battery management system.

[0066] In an optional embodiment, as shown in ​ the detection unit 30 further comprises a resistor R10, one end of the resistor R10 is connected with the charging connection detection port MCU_CC1_ADC of the battery management system, and the other end of the resistor R10 is connected between the first voltage dividing resistor R8 and the second voltage dividing resistor R14. Through the circuit structure, the stability of the battery management system can be further improved.

[0067] In an optional embodiment, the working principle of the charging wake-up circuit provided in the present application is described with a specific example. In the plug-in sleep state, the CC1 signal output by the charging connection confirmation port on the charging gun of the charging pile is 2.5V, which pulls up the voltage at the gate of the first NMOS tube S2', so that the drain and source of the first NMOS tube are turned on, thereby realizing the closing of the first NMOS tube S2' in the plug-in sleep state, satisfying the requirement in the charging standard of GBT18487.1-2023 that "the first NMOS tube S2' is required to be closed in the plug-in sleep state to meet the control state requirement of the charging reservation function". Further, when the user's charging reservation time is reached, the CC1 signal output by the charging connection confirmation port on the charging gun changes from 2.5V to 8V. At this time, the PNP transistor Q3 in the wake-up unit 20 receives the rising edge signal and is turned on, and then the charging connection confirmation signal CC1 is transmitted to the base of the NPN transistor Q4 through the PNP transistor Q3 to turn on the NPN transistor Q4, so that the signal at the output end KL30 of the target power supply can be output to the power wake-up port CC1_WK of the battery management system, thereby realizing the wake-up of the battery management system and realizing the charging reservation function. After the battery management system is woken up, the battery management system can output a holding signal to itself through its MCU_EN port to maintain the working state.

[0068] Therefore, the scheme provided in the application achieves the purpose of turning on the first NMOS tube based on the signal output by the charging gun in the sleep state of the battery management system, thereby achieving the technical effect that the battery management system can support the charging reservation function in the sleep state, and further solving the problem that the battery management system of the electric vehicle cannot support the charging reservation function in the sleep state in the related art.

[0069] Embodiment 2

[0070] According to the embodiment of the utility model, an electric vehicle is provided, which comprises the charging wake-up circuit of the electric vehicle in the embodiment 1.

[0071] The above embodiment numbers of the utility model are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0072] In the above embodiments of the utility model, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0073] In several embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented by other ways. Among them, the above-mentioned device embodiments are only schematic, for example, the division of units can be a logical function division, and actual implementation can have another division way, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be through some interface, indirect coupling or communication connection between units or modules, which can be electrical or other forms.

[0074] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed to multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0075] In addition, each functional unit in each embodiment of the utility model can be integrated in a processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware or in the form of software functional unit.

[0076] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, without departing from the principle of the utility model, some improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection range of the utility model.

Claims

1. A charging wake-up circuit for an electric vehicle, characterized in that, The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit.

2. The electric vehicle charging wake-up circuit of claim 1, wherein, The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit.

3. The electric vehicle charging wake-up circuit of claim 2, wherein, The application relates to an electric vehicle charging wake-up circuit.

4. The electric vehicle charging wake-up circuit of claim 1, wherein, The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit.

5. The electric vehicle charging wake-up circuit of claim 4, wherein, The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit.

6. The electric vehicle charging wake-up circuit of claim 5, wherein, The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit.

7. The electric vehicle charging wake-up circuit of claim 1, wherein, The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit.

8. The electric vehicle charging wake-up circuit of claim 7, wherein, The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit.

9. The electric vehicle charging wake-up circuit of claim 8, wherein, The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging wake-up circuit. The application relates to an electric vehicle charging 10. An electric vehicle, characterized by The electric vehicle includes the electric vehicle charging wake-up circuit according to any one of claims 1 to 9.

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