Gun insertion state detection circuit, controller and vehicle

Abstract

A gun plug state detection circuit, a controller and a vehicle realize gun plug state detection in different standards through a detection circuit. The gun plug state detection circuit includes a wake-up circuit and a sampling circuit. The wake-up circuit is used to output a wake-up signal immediately or with delay when the gun plug is connected to the socket according to the resistance value of the access resistor of the gun plug state detection circuit. The wake-up signal is used to trigger the CPU to drive the sampling circuit. The sampling circuit is used to inject a start voltage under the drive of the CPU. After the start voltage is injected, the level of the detection point of the sampling circuit is used to indicate the gun plug state.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and in particular to a gun insertion state detection circuit, a controller and a vehicle. Background Art

[0002] With the development of technology in the field of new energy, the application of new energy vehicles is becoming more and more popular, such as electric vehicles / electric vehicles / hybrid electric vehicles. At present, there are three major standards for AC charging of new energy vehicles: the American standard (abbreviated as American standard), the European standard (abbreviated as European standard), and the Chinese standard (abbreviated as national standard), which stipulate the connection and control guidance between new energy vehicles and charging piles. New energy vehicles and charging piles can interact through the plug-in status signal. In the European standard and the American standard, the plug-in status signal is also called the PP (proximity pilot) signal, and in the national standard, the plug-in status signal is also called the connection confirm function (connection confirm function, CC) signal.

[0003] Among the three major standards, the interface configurations between electric vehicles and charging piles in the national standard and the European standard are similar, and the same plug-in status detection circuit can be used to detect the plug-in status; while the interface configuration in the American standard is quite different from the interface configurations in the other two standards (national standard and European standard), and the same plug-in status detection circuit cannot be used to detect the plug-in status.

[0004] In the national standard, the interface diagram of the charging plug (i.e., plug gun) on the charging pile and the charging socket (hereinafter referred to as the socket) on the electric vehicle can be as follows: Figure 1 As shown in FIG. 1 , after the plug gun is inserted into the socket, the CC detection circuit on the electric vehicle side can determine the plug gun status by detecting the resistance value of the RC resistor (the resistance value of the RC resistor is calculated by detecting the voltage at the CC detection point); in the American standard, the interface diagram of the plug gun and the socket can be as shown in FIG. Figure 2 As shown in the figure, after the plug is inserted into the socket, the CC detection circuit can determine the plug status by detecting the voltage at the CC detection point. Figure 1 and Figure 2 It can be seen that the American standard has an additional resistor R5 in the socket compared to the national standard. In addition, in the national standard, there is no mandatory requirement for the values ​​of U and R, while in the American standard, U, R4, R5, R6 and R7 are all fixed values.

[0005] Due to the different interface configurations in different standards, it is impossible to use the same gun plug-in status detection circuit to detect the gun plug-in status under the three major standards.

[0006] In the prior art, in order to be compatible with the national standard, European standard and American standard detection, the following solution is usually adopted: the gun insertion status detection circuit supports the national standard / European standard detection by default, and supports the American standard detection by configuring a conversion module, such as Figure 3 When the gun insertion state detection is performed, it is determined according to the system configuration whether the gun insertion state detection needs to be converted by the conversion module.

[0007] When the solution provided by the prior art is used to detect the gun insertion status, it is necessary to configure a conversion module and select different paths for detection according to the scenario, which increases the number of product configurations on the electric vehicle side and is not conducive to the unified design and supply of products. Summary of the invention

[0008] The embodiments of the present application provide a gun insertion status detection circuit, a controller, and a vehicle, which implement gun insertion status detection in different standards through one detection circuit.

[0009] In the first aspect, the embodiment of the present application provides a gun plug state detection circuit, which includes a wake-up circuit and a sampling circuit. The wake-up circuit is used to output a wake-up signal immediately or with delay when the gun is connected to the socket according to the resistance value of the access resistor of the gun plug state detection circuit, and the wake-up signal is used to trigger the central processing unit CPU to drive the sampling circuit; the sampling circuit is used to inject a start voltage under the drive of the CPU, and after the start voltage is injected, the level of the detection point of the sampling circuit is used to indicate the gun plug state.

[0010] The gun plug state detection circuit provided in the first aspect is adopted, and for different access resistor value ranges, the wake-up signal is distinguished by immediate output or delayed output. No matter it is a national standard plug-in gun, a European standard plug-in gun or an American standard plug-in gun, after being inserted into the socket, the wake-up circuit can be triggered to output a wake-up signal, thereby triggering the CPU to drive the sampling circuit to inject a start voltage, and then start the gun plug state detection. Compared with the scheme provided in the prior art, the sampling scheme can detect the gun plug state under different standards through a set of gun plug state detection circuits, reducing the number of product configurations on the electric vehicle side, which is conducive to the unified design and supply of products.

[0011] In addition, the wake-up signal is also used to trigger the CPU to collect the level of the detection point.

[0012] With the above solution, after collecting the level of the detection point, the CPU can determine the gun insertion state according to the level of the detection point.

[0013] In a possible design, the wake-up circuit is further configured to disconnect the detection point under the control of the CPU after outputting the wake-up signal.

[0014] With the above solution, after the wake-up circuit outputs the wake-up signal, the function of the wake-up circuit has been completed. At this time, the connection between the wake-up circuit and the detection point can be disconnected, thereby reducing system power consumption.

[0015] In one possible design, the wake-up circuit includes: a wake-up function enabling circuit, which is used to connect the detection point with the wake-up circuit when the gun is connected to the socket; a delay circuit, which is used to realize the delayed conduction of the switch tube; a trigger level conversion circuit, which is used to trigger the wake-up signal output circuit to output a wake-up signal when the switch tube in the delay circuit is not turned on when the resistance value of the access resistor of the gun state detection circuit is less than the first resistance value; and, when the resistance value of the access resistor of the gun state detection circuit is greater than the second resistance value, trigger the wake-up signal output circuit to output a wake-up signal when the switch tube in the delay circuit is turned on; a wake-up signal output circuit, which is used to output a wake-up signal under the triggering of the trigger level conversion circuit.

[0016] Furthermore, the wake-up function enabling circuit is also used to disconnect the detection point from the wake-up circuit under the control of the CPU after the wake-up signal output circuit outputs the wake-up signal.

[0017] As mentioned above, after the wake-up circuit outputs the wake-up signal, it can also disconnect from the detection point under the control of the CPU. With the above solution, the wake-up function enabling circuit can realize this function.

[0018] In one possible design, the sampling circuit includes: a first switch tube, a first end of the first switch tube is used to input a start-up voltage, and a second end of the first switch tube is coupled to a CPU; a first resistor, a first end of the first resistor is coupled to a third end of the first switch tube, and a second end of the first resistor is coupled to a detection point.

[0019] The first switch tube can be an NPN transistor, an NMOS or other devices with similar functions. When the voltage at the second end is higher than the voltage at the third end by a certain value, the first switch tube is in an on state. The second end of the first switch tube is a control end, for example, it can be the base of an NPN transistor or the gate of an NMOS. The second end of the first switch tube is coupled to the CPU, and the first switch tube is opened or closed under the control of the CPU.

[0020] In one possible design, the wake-up function enabling circuit includes: a second switch tube, a first end of the second switch tube is coupled to a delay circuit and a trigger level conversion circuit, a second end of the second switch tube is coupled to a first end of a third switch tube, and a third end of the second switch tube is coupled to a detection point; a third switch tube, a second end of the third switch tube is coupled to a CPU, and a third end of the third switch tube is grounded; a second resistor, a first end of the second resistor is coupled to a first end of the second switch tube, and a second end of the second resistor is coupled to a first end of the third switch tube.

[0021] The second switch tube and the third switch tube can be NPN transistors, NMOS or other devices with similar functions. When the voltage at the second end is higher than the voltage at the third end by a certain value, the second switch tube is in the on state, and the third switch tube is also in the on state. The second end of the second switch tube and the second end of the third switch tube are control ends, for example, they can be the base of an NPN transistor or the gate of an NMOS.

[0022] With the above solution, after the plug is inserted into the socket, the detection point is grounded. For the second switch tube, the voltage at the third end decreases, so that the voltage difference between the second end and the third end meets the conduction condition of the second switch tube. After the second switch tube is turned on, the wake-up circuit is connected to the detection point.

[0023] In one possible design, the delay circuit includes: a third resistor, a first end of the third resistor is coupled to the trigger level conversion circuit, and a second end of the third resistor is coupled to the first end of the first capacitor; a first capacitor, a second end of the first capacitor is coupled to the first end of the second switch tube; a fourth switch tube, a first end of the fourth switch tube is coupled to the first end of the third resistor, a second end of the fourth switch tube is coupled to the second end of the third resistor, and a third end of the fourth switch tube is coupled to the second end of the first capacitor; a second capacitor, a first end of the second capacitor is coupled to the second end of the first capacitor, and a second end of the second capacitor is coupled to the trigger level conversion circuit.

[0024] The fourth switch tube may be an NPN transistor, an NMOS or other devices with similar functions. When the voltage at the second end is higher than the voltage at the third end by a certain value, the fourth switch tube is in an on state. The second end of the fourth switch tube is a control end, for example, it may be the base of an NPN transistor or the gate of an NMOS.

[0025] With the above solution, the two ends of the first capacitor are connected across the second and third ends of the fourth switch tube. As mentioned above, after the plug is inserted into the socket, the first capacitor in the delay circuit starts to charge, and the fourth switch tube is not turned on at this time; after charging for a certain period of time, the voltage difference between the second and third ends of the fourth switch tube meets the turn-on condition of the fourth switch tube, the fourth switch tube is turned on, the first capacitor is charged, and the first capacitor is short-circuited. Through the delayed turn-on of the fourth switch tube, the delay circuit can achieve the output delay of the wake-up signal.

[0026] In one possible design, the trigger level conversion circuit includes: a fourth resistor, a first end of the fourth resistor is used to receive an input voltage of the wake-up circuit, and a second end of the fourth resistor is coupled to the second end of the second capacitor; a fifth resistor, a first end of the fifth resistor is used to receive an input voltage of the wake-up circuit, and a second end of the fifth resistor is coupled to the first end of the second resistor; a sixth resistor, a first end of the sixth resistor is coupled to the second end of the fourth resistor, and a second end of the third bias circuit is grounded; a fifth switch tube, a first end of the fifth switch tube is coupled to the wake-up signal output circuit, a second end of the fifth switch tube is coupled to the second end of the fourth resistor, and a third end of the fifth switch tube is coupled to the first end of the second switch tube.

[0027] The fifth switch tube may be an NPN transistor, an NMOS or other devices with similar functions. When the voltage at the second end is higher than the voltage at the third end by a certain value, the fifth switch tube is in an on state. The second end of the fifth switch tube is a control end, for example, it may be the base of an NPN transistor or the gate of an NMOS.

[0028] In one possible design, the wake-up signal output circuit includes: a seventh resistor, a first end of the seventh resistor is used to receive an input voltage of the wake-up circuit; an eighth resistor, a first end of the eighth resistor is coupled to the second end of the seventh resistor, and the second end of the eighth resistor is coupled to the first end of the fifth switch tube; a sixth switch tube, a first end of the sixth switch tube outputs a wake-up signal when the sixth switch tube is turned on, a second end of the sixth switch tube is coupled to the second end of the seventh resistor, and a third end of the sixth switch tube is coupled to the first end of the seventh resistor.

[0029] With the above solution, after the gun is inserted into the socket, the second switch tube in the wake-up function enabling circuit is turned on, and the wake-up circuit is connected to the detection point. The fourth switch tube in the delay circuit is an NPN transistor or NMOS. At this time, the voltage difference between its second end and the third end is difficult to meet the closing condition of the fourth switch tube, and the fourth switch tube is in the off state. The fourth resistor in the trigger level conversion circuit is connected to the circuit, and the first capacitor is charged through the path of the fifth resistor → the third resistor → the first capacitor → R5. As the charging process of the first capacitor proceeds, the voltage difference between the second end and the third end of the fourth switch tube becomes larger and larger. When the conduction condition of the fourth switch tube is reached, the fourth switch tube is turned on, the third resistor and the first capacitor are short-circuited, and the first capacitor stops charging.

[0030] Then, in the three scenarios of American standard, national standard S3 closure, and European standard, the resistance of the access resistor of the gun plug status detection circuit is less than the first resistance. When the fourth switch tube is in the off state, the resistance of the access resistor can trigger the fifth switch tube to turn on. After the fifth switch tube is turned on, the trigger level conversion circuit can drive the wake-up signal output circuit to output a wake-up signal.

[0031] In the scenario where the national standard S3 is not closed, the resistance of the access resistor of the gun plug state detection circuit is greater than the second resistance. When the fourth switch tube is in the off state, the resistance of the access resistor cannot trigger the fifth switch tube to turn on; as the charging process of the first capacitor proceeds, the voltage at the second end of the fourth switch tube gradually increases until the fourth switch tube is turned on. After the fourth switch tube is turned on, the third resistor and the first capacitor are short-circuited. At this time, the connection relationship inside the gun plug state detection circuit changes, and the resistance value also changes. The resistance of the access resistor of the gun plug state detection circuit can trigger the fifth switch tube to turn on. After the fifth switch tube is turned on, the trigger level conversion circuit can drive the wake-up signal output circuit to output a wake-up signal.

[0032] In addition, the wake-up signal output circuit further includes a third capacitor, a first end of the third capacitor is coupled to the first end of the sixth switch tube, and a second end of the third capacitor is used to output the wake-up signal.

[0033] With the above solution, the wake-up signal is a pulse signal, that is, before the sixth switch tube is turned on, the output of the wake-up circuit is low level, and after the sixth switch tube is turned on, the wake-up circuit outputs a pulse signal. The pulse signal received by the CPU can be regarded as the wake-up signal.

[0034] In the second aspect, an embodiment of the present application also provides a gun plug-in state detection circuit, which includes: a first resistor, the first end of the first resistor is used to inject a starting voltage, and after the starting voltage is injected, the level of the detection point of the gun plug-in state detection circuit is used to indicate the gun plug-in state; a second resistor, the first end of the second resistor is coupled with the second end of the first resistor, and the second end of the second resistor is coupled with the detection point; a switch tube, the first end of the switch tube outputs a wake-up signal when the switch tube is turned on, the second end of the switch tube is coupled with the second end of the first resistor, and the third end of the switch tube is coupled with the first end of the first resistor, and the wake-up signal is used to trigger the CPU to collect the level of the detection point.

[0035] The resistance values ​​of the first resistor and the second resistor satisfy the following condition: when the plug gun is not connected to the socket, the switch tube is in an off state; when the plug gun is connected to the socket, the switch tube is in an on state.

[0036] By adopting the above scheme, under the three standards of national standard, European standard and American standard, a wake-up signal can be output after the plug gun is inserted into the socket. After receiving the wake-up signal, the CPU collects the voltage of the detection point and then determines the plug gun state detection. That is, by adopting the plug gun state detection circuit provided by the embodiment of the present application, the plug gun state detection in different standards can be realized through one detection circuit, thereby reducing the number of product configurations on the electric vehicle side, which is conducive to the unified design and supply of products.

[0037] In addition, the gun insertion state detection circuit provided in the second aspect further includes: a level conversion unit, which is used to convert the output voltage of the power battery into a starting voltage and inject it into the first end of the first resistor.

[0038] In a third aspect, an embodiment of the present application further provides a controller, which includes the gun insertion status detection circuit provided by the first aspect and the second aspect and any possible design thereof.

[0039] In a fourth aspect, an embodiment of the present application further provides a vehicle, comprising a CPU and the controller provided in the third aspect.

[0040] In addition, the technical effects brought about by any possible design method in the third aspect and any possible design method in the fourth aspect can refer to the technical effects brought about by different design methods in the first aspect and the second aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of the interface between an electric vehicle and a charging pile in a national standard provided by the prior art;

[0042] Figure 2 A schematic diagram of the interface between an electric vehicle and a charging pile in the American standard provided by the prior art;

[0043] Figure 3 A schematic diagram of the structure of a gun insertion state detection circuit provided by the prior art;

[0044] Figure 4 A schematic diagram of the structure of a first gun insertion state detection circuit provided in an embodiment of the present application;

[0045] Figure 5 A schematic diagram of the structure of a sampling circuit provided in an embodiment of the present application;

[0046] Figure 6 A schematic diagram of the structure of a wake-up function enabling circuit provided in an embodiment of the present application;

[0047] Figure 7 A schematic diagram of the connection between a wake-up function enabling circuit and a socket and a plug gun provided in an embodiment of the present application;

[0048] Figure 8 A schematic diagram of the structure of a delay circuit and a trigger level conversion circuit provided in an embodiment of the present application;

[0049] Fig. 9 A structural schematic diagram of a wake-up signal output circuit is provided for an embodiment of the present application;

[0050] Fig.10 A schematic diagram of the structure of a second gun insertion state detection circuit provided in an embodiment of the present application;

[0051] Fig.11 A schematic diagram of the structure of a third gun insertion state detection circuit provided in an embodiment of the present application;

[0052] Fig.12 A schematic diagram of the structure of a fourth gun insertion state detection circuit provided in an embodiment of the present application;

[0053] Fig.13 A schematic diagram of the structure of a controller provided in an embodiment of the present application;

[0054] Fig.14 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] The gun insertion status detection solution provided in the embodiment of the present application is used to detect the gun insertion status.

[0056] Specifically, the gun plug-in state can be fully connected, half-connected, and not connected. Exemplarily, in the national standard, the gun is inserted into the socket and S3 is not closed, the gun plug-in state at this time is half-connected; the gun is inserted into the socket and S3 is closed, the gun plug-in state at this time is fully connected; the gun is not inserted into the socket, the gun plug-in state at this time is not connected. In addition, in the national standard and the European standard, for the fully connected state, different charging cable capacities can also correspond to different gun plug-in states. For example, full connection and a charging cable current carrying capacity of 10A correspond to one gun plug-in state, and full connection and a charging cable current carrying capacity of 32A correspond to another gun plug-in state. Different gun plug-in states have different resistance values ​​of the RC resistor.

[0057] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0058] The present application embodiment provides a gun insertion state detection circuit. Figure 4 As shown, the gun insertion state detection circuit 400 includes a wake-up circuit 401 and a sampling circuit 402 .

[0059] Among them, the wake-up circuit 401 is used to immediately output or delay the output of a wake-up signal when the gun is connected to the socket according to the resistance value of the access resistor of the gun plug-in status detection circuit 400, and the wake-up signal is used to trigger the central processing unit (CPU) to drive the sampling circuit 402; the sampling circuit 402 is used to inject a starting voltage under the drive of the CPU, and after the starting voltage is injected, the level of the detection point of the sampling circuit 402 is used to indicate the gun plug-in status.

[0060] From the description of the background technology, it can be seen that there are differences in the interface configurations of the national standard, the European standard and the American standard. For the gun plug state detection circuit configured on the electric vehicle, different interface configurations correspond to different access resistors. For example, under the American standard, after the gun is inserted into the socket, the access resistor of the gun plug state detection circuit has a resistance range of 100Ω to 1.5kΩ; when the national standard S3 is not closed, after the gun is inserted into the socket, the access resistor of the gun plug state detection circuit has a resistance of 3.8kΩ.

[0061] In the embodiment of the present application, for different resistance ranges of access resistors, a distinction is made by immediately outputting or delaying the output of a wake-up signal. Regardless of whether it is a national standard plug-in gun, a European standard plug-in gun, or an American standard plug-in gun, after being inserted into the socket, the wake-up circuit 401 can be triggered to output a wake-up signal, thereby triggering the CPU to drive the sampling circuit 402 to inject a start-up voltage, thereby starting the plug-in status detection.

[0062] For example, in the three scenarios of American standard, national standard S3 closed, and European standard, after the gun is inserted into the socket, the access resistance of the gun status detection circuit 400 ranges from 100Ω to 1.5kΩ, and the wake-up circuit 401 can immediately output a wake-up signal; for another example, in the national standard S3 unclosed scenario, after the gun is inserted into the socket, the access resistance of the gun status detection circuit 400 is about 3.8kΩ, and the wake-up circuit 401 can delay the output of the wake-up signal.

[0063] After receiving the wake-up signal output by the wake-up circuit 401, the CPU can drive the sampling circuit 402 to inject a start voltage into the sampling circuit 402. After the start voltage is injected, the level of the detection point of the sampling circuit 402 is used to indicate the gun plug-in state. The CPU can collect the level of the detection point to determine the gun plug-in state.

[0064] In the embodiment of the present application, the specific way for the CPU to determine the gun plug state can be: when the gun is not inserted into the socket, the wake-up circuit 401 does not output the wake-up signal, and the CPU determines that the gun plug state is not connected when it does not receive the wake-up signal; after the gun is inserted into the socket, when the access resistor has different resistance values, the wake-up circuit 401 will immediately output or delay the output of the wake-up signal; after receiving the wake-up signal, the CPU drives the sampling circuit 402 to inject the driving voltage, and determines the gun plug state by detecting the voltage at the detection point. When the S3 switch state is different and the cable current carrying capacity is different, the voltage at the detection point detected by the CPU is different, so the CPU can determine the gun plug state according to the voltage at the detection point.

[0065] It is not difficult to see that in the implementation of this application, under the standards of American standards, European standards and national standards, as long as the gun is inserted into the socket, the wake-up circuit 401 outputs (immediately or delayed) a wake-up signal. After receiving the wake-up signal, the CPU can drive the sampling circuit 402 and determine the gun plug-in status by collecting the voltage of the detection point in the sampling circuit 402. In other words, the gun plug-in status detection circuit 400 provided in the embodiment of the present application can detect the gun plug-in status under different standards. Compared with the solution provided in the prior art, in the embodiment of the present application, a set of gun plug-in status detection circuits 400 can be used to detect the gun plug-in status under different standards, which reduces the number of product configurations on the electric vehicle side and is conducive to the unified design and supply of products.

[0066] Specifically, in the embodiment of the present application, the sampling circuit 402 may include a first switch tube and a first resistor. The first end of the first switch tube is used to input the start voltage, and the second end of the first switch tube is coupled to the CPU; the first end of the first resistor is coupled to the third end of the first switch tube, and the second end of the first resistor is coupled to the detection point, such as Figure 5 shown.

[0067] The first switch tube can be an NPN transistor, an N-metal-oxide-semiconductor (NMOS) or other devices with similar functions. When the voltage at the second end is higher than the voltage at the third end by a certain value, the first switch tube is in an on state. The second end of the first switch tube is a control end, for example, it can be the base of an NPN transistor or the gate of an NMOS. The second end of the first switch tube is coupled to the CPU, and the first switch tube is opened or closed under the control of the CPU.

[0068] After receiving the wake-up signal, the CPU can send a driving signal to the first switch tube (for example, applying a 12V level to the second end of the first switch tube), so that the voltage at the second end of the first switch tube increases and reaches the conduction condition of the first switch tube. After the first switch tube is turned on, the start-up voltage (exemplarily, the start-up voltage can be 5V) is injected into the sampling circuit 402.

[0069] The sampling circuit 402 provided in the embodiment of the present application is different from the prior art (for example Figure 1 or Figure 2The function and structure of the CC detection circuit provided in the present invention are similar. The difference is that a first switch tube is provided in the sampling circuit 402. After the plug gun is inserted into the socket, the wake-up circuit 401 outputs a wake-up signal, and the CPU drives the sampling circuit 402 through the first switch tube only after receiving the wake-up signal. In other words, by providing the first switch tube in the sampling circuit 402, the sampling circuit 402 can not inject a start-up voltage when the plug gun is not inserted into the socket, that is, the sampling circuit 402 does not work, thereby reducing the static current and reducing the system power consumption.

[0070] It should be noted that, in the embodiment of the present application, the positions of the first switch tube and the first resistor can be interchanged (the second end of the first switch tube is still coupled to the CPU), for example, the first end of the first resistor is used to input the start voltage, and the first end and the third end of the first switch tube are respectively coupled to the second end of the first resistor and the detection point. The interchange of the positions of the first switch tube and the first resistor has no substantial effect on the realization of the function of the sampling circuit 402.

[0071] In the embodiment of the present application, the wake-up circuit 401 is also used to disconnect the connection with the detection point under the control of the CPU after outputting the wake-up signal.

[0072] After the wake-up circuit 401 outputs the wake-up signal, the function of the wake-up circuit 401 has been completed. At this time, the connection between the wake-up circuit 401 and the detection point can be disconnected, thereby reducing system power consumption.

[0073] Specifically, the wake-up circuit 401 may include a wake-up function enabling circuit, a delay circuit, a trigger level conversion circuit, and a wake-up signal output circuit. The wake-up function enabling circuit is used to connect the detection point with the wake-up circuit 401 when the plug-in gun is connected to the socket; the delay circuit is used to realize the delayed conduction of the switch tube; the trigger level conversion circuit is used to trigger the wake-up signal output circuit to output a wake-up signal when the switch tube in the delay circuit is not turned on when the resistance value of the access resistor of the plug-in gun state detection circuit 400 is less than the first resistance value; and, when the resistance value of the access resistor of the plug-in gun state detection circuit 400 is greater than the second resistance value, the wake-up signal output circuit is triggered to output a wake-up signal when the switch tube in the delay circuit is turned on; the wake-up signal output circuit is used to output a wake-up signal under the triggering of the trigger level conversion circuit.

[0074] Among them, the delay circuit realizes the delay of the output of the wake-up signal by the delayed conduction of the switch tube. The delay circuit may include a switch tube and a capacitor, and the two ends of the capacitor are connected across the second end and the third end of the switch tube. After the gun is inserted into the socket, the capacitor in the delay circuit begins to charge, and the switch tube is not turned on at this time; after charging for a certain period of time, the voltage difference between the second end and the third end of the switch tube meets the conduction condition of the switch tube, the switch tube is turned on, the capacitor is charged, and the capacitor is short-circuited. The off state and the on state of the switch tube in the delay circuit correspond to the two connection states inside the gun state detection circuit 400, respectively. These two states can adapt to the different resistance values ​​of the access resistor of the gun state detection circuit 400, then under the American standard, the European standard and the national standard (different standards correspond to different resistance ranges of the access resistor), when the gun is inserted into the socket, the wake-up circuit 401 can output a wake-up signal.

[0075] For example, in the three scenarios of American standard, national standard S3 closed, and European standard, after the gun is inserted into the socket, the access resistance of the gun state detection circuit 400 ranges from 100Ω to 1.5kΩ, and when the switch tube in the delay circuit is not turned on (that is, when the capacitor starts to charge), the connection state inside the gun state detection circuit 400 can trigger the wake-up circuit 401 to output a wake-up signal, that is, the wake-up signal is output immediately after the gun is inserted into the socket; for another example, in the scenario where the national standard S3 is not closed, after the gun is inserted into the socket, the access resistance of the gun state detection circuit 400 is about 3.8kΩ, when the switch tube in the delay circuit is not turned on (that is, when the capacitor is charged), the connection state inside the gun state detection circuit 400 will not trigger the wake-up circuit 401 to output a wake-up signal, and when the switch tube in the delay circuit is turned on (that is, the capacitor is fully charged), the connection state inside the gun state detection circuit 400 can trigger the wake-up circuit 401 to output a wake-up signal, that is, the output of the wake-up signal is delayed after the gun is inserted into the socket.

[0076] In addition, as mentioned above, after the wake-up circuit 401 outputs the wake-up signal, it can also disconnect the connection with the detection point under the control of the CPU. Specifically, this function can be realized by the wake-up function enabling circuit, that is, the wake-up function enabling circuit is also used to disconnect the detection point from the wake-up circuit 401 under the control of the CPU after the wake-up circuit 401 outputs the wake-up signal.

[0077] The functions of the wake-up function enabling circuit, the delay circuit, the trigger level conversion circuit and the wake-up signal output circuit are introduced above. The specific structures of the wake-up function enabling circuit, the delay circuit, the trigger level conversion circuit and the wake-up signal output circuit are introduced below.

[0078] 1. Wake-up function enabling circuit

[0079] In the embodiment of the present application, the wake-up function enabling circuit includes a second switch tube, a third switch tube, and a second resistor. Specifically, the first end of the second switch tube is coupled to the delay circuit and the trigger level conversion circuit, the second end of the second switch tube is coupled to the first end of the third switch tube, and the third end of the second switch tube is coupled to the detection point; the second end of the third switch tube is coupled to the CPU, and the third end of the third switch tube is grounded; the first end of the second resistor is coupled to the first end of the second switch tube, and the second end of the second resistor is coupled to the first end of the third switch tube, such as Figure 6 shown.

[0080] The second switch tube and the third switch tube can be NPN transistors, NMOS or other devices with similar functions. When the voltage at the second end is higher than the voltage at the third end by a certain value, the second switch tube is in the on state, and the third switch tube is also in the on state. The second end of the second switch tube and the second end of the third switch tube are control ends, for example, they can be the base of an NPN transistor or the gate of an NMOS.

[0081] The second end of the third switch tube is coupled to the CPU, and the third switch tube is opened or closed under the control of the CPU. Before receiving the wake-up signal, the CPU controls the third switch tube to turn off (i.e., drive it to low), and the wake-up circuit 401 works normally at this time; after receiving the wake-up signal, the CPU controls the third switch tube to turn on (i.e., drive it to high), and at this time, the connection between the wake-up circuit 401 and the detection point is disconnected, and the wake-up circuit 401 no longer works, that is, as described above, the wake-up function enabling circuit is also used to disconnect the detection point from the wake-up circuit 401 under the control of the CPU after the wake-up circuit 401 outputs the wake-up signal.

[0082] The following analyzes the working principle of the wake-up function enabling circuit when the third switch tube is in the off state (that is, the CPU does not receive the wake-up signal). For the convenience of analysis, the wake-up function enabling circuit and the interface configuration structure are shown in one figure, and the American standard interface is taken as an example (in the following figures of the embodiment of this application, the American standard interface is also taken as an example, and no further description is given later). Figure 7 As shown, the connection relationship between the wake-up function enabling circuit and the plug gun and the socket can be as follows Figure 7 After the plug is inserted into the socket, the detection point is grounded through R5. For the second switch tube, the voltage of the third end decreases, so that the voltage difference between the second end and the third end meets the conduction condition of the second switch tube. After the second switch tube is turned on, the wake-up circuit 401 is connected to the detection point.

[0083] 2. Delay Circuit

[0084] In the embodiment of the present application, the delay circuit includes a third resistor, a first capacitor, a fourth switch tube and a second capacitor. The first end of the third resistor is coupled to the trigger level conversion circuit, the second end of the third resistor is coupled to the first end of the first capacitor; the second end of the first capacitor is coupled to the first end of the second switch tube; the first end of the fourth switch tube is coupled to the first end of the third resistor, the second end of the fourth switch tube is coupled to the second end of the third resistor, and the third end of the fourth switch tube is coupled to the second end of the first capacitor; the first end of the second capacitor is coupled to the second end of the first capacitor, and the second end of the second capacitor is coupled to the trigger level conversion circuit.

[0085] The fourth switch tube may be an NPN transistor, an NMOS or other devices with similar functions. When the voltage at the second end is higher than the voltage at the third end by a certain value, the fourth switch tube is in an on state. The second end of the fourth switch tube is a control end, for example, it may be the base of an NPN transistor or the gate of an NMOS.

[0086] The two ends of the first capacitor are connected across the second and third ends of the fourth switch tube. As mentioned above, after the plug gun is inserted into the socket, the first capacitor in the delay circuit starts to charge, and the fourth switch tube is not turned on at this time; after charging for a certain period of time, the voltage difference between the second and third ends of the fourth switch tube meets the turn-on condition of the fourth switch tube, the fourth switch tube is turned on, the first capacitor is charged, and the first capacitor is short-circuited. Through the delayed turn-on of the fourth switch tube, the delay circuit can realize the output delay of the wake-up signal.

[0087] Since the delay circuit and the trigger level conversion circuit work in coordination, the specific functions of the delay circuit will be described together with the trigger level conversion circuit later.

[0088] 3. Trigger level conversion circuit

[0089] In the embodiment of the present application, the trigger level conversion circuit includes a fourth resistor, a fifth resistor, a sixth resistor and a fifth switch tube. The first end of the fourth resistor is used to receive the input voltage of the wake-up circuit 401, and the second end of the fourth resistor is coupled to the second end of the second capacitor; the first end of the fifth resistor is used to receive the input voltage of the wake-up circuit 401 (for example, it can be 12V), and the second end of the fifth resistor is coupled to the first end of the second resistor; the first end of the sixth resistor is coupled to the second end of the fourth resistor, and the second end of the third bias circuit is grounded; the first end of the fifth switch tube is coupled to the wake-up signal output circuit, the second end of the fifth switch tube is coupled to the second end of the fourth resistor, and the third end of the fifth switch tube is coupled to the first end of the second switch tube.

[0090] The fifth switch tube may be an NPN transistor, an NMOS or other devices with similar functions. When the voltage at the second end is higher than the voltage at the third end by a certain value, the fifth switch tube is in an on state. The second end of the fifth switch tube is a control end, for example, it may be the base of an NPN transistor or the gate of an NMOS.

[0091] The structural diagram of the delay circuit and the trigger level conversion circuit can be shown as follows Figure 8 shown.

[0092] The working principle of the delay circuit and the trigger level conversion circuit is analyzed below: After the gun is inserted into the socket, the second switch tube in the wake-up function enabling circuit is turned on, and the wake-up circuit 401 is connected to the detection point. The fourth switch tube in the delay circuit is an NPN-type triode or NMOS. At this time, the voltage difference between its second end and the third end is difficult to meet the closing condition of the fourth switch tube, and the fourth switch tube is in the off state. The fourth resistor in the trigger level conversion circuit is connected to the circuit, and the first capacitor is charged through the path of the fifth resistor → the third resistor → the first capacitor → R5. As the charging process of the first capacitor proceeds, the voltage difference between the second end and the third end of the fourth switch tube becomes larger and larger. When the conduction condition of the fourth switch tube is reached, the fourth switch tube is turned on, the third resistor and the first capacitor are short-circuited, and the first capacitor stops charging.

[0093] In the three scenarios of American standard, national standard S3 closure, and European standard, the resistance of the access resistor of the gun plug status detection circuit 400 is less than the first resistance (for example, it can be 1.5kΩ). When the fourth switch tube is in the off state, the resistance of the access resistor can trigger the fifth switch tube to turn on. After the fifth switch tube is turned on, the trigger level conversion circuit can drive the wake-up signal output circuit to output a wake-up signal.

[0094] In the scenario where the national standard S3 is not closed, the resistance of the access resistor of the gun plug state detection circuit 400 is greater than the second resistance (for example, it can be 3.7kΩ or 3.8kΩ). When the fourth switch tube is in the off state, the resistance of the access resistor cannot trigger the fifth switch tube to turn on; as the charging process of the first capacitor proceeds, the voltage at the second end of the fourth switch tube gradually increases until the fourth switch tube is turned on. After the fourth switch tube is turned on, the third resistor and the first capacitor are short-circuited. At this time, the connection relationship inside the gun plug state detection circuit 400 changes, and the resistance value also changes. The resistance value of the access resistor of the gun plug state detection circuit 400 can trigger the fifth switch tube to turn on. After the fifth switch tube is turned on, the trigger level conversion circuit can drive the wake-up signal output circuit to output a wake-up signal.

[0095] In the trigger level conversion circuit, the fifth switch tube operates in the saturation region. When the plug is inserted into the socket, the fifth switch tube is turned on briefly and then turned off.

[0096] It is not difficult to see that in the three scenarios of American standard, national standard S3 closed, and European standard, after the plug gun is inserted into the socket, the wake-up circuit 401 immediately outputs a wake-up signal; in the scenario of national standard S3 not closed, after the plug gun is inserted into the socket, the wake-up circuit 401 does not output a wake-up signal immediately, but outputs a wake-up signal after a delay of a set time. The set time is the charging time of the first capacitor, which can be set by adjusting the capacitance value of the first capacitor, the resistance value of the third resistor, the resistance value of the fifth resistor, etc.

[0097] 4. Wake-up signal output circuit

[0098] In the embodiment of the present application, the wake-up signal output circuit includes a seventh resistor, an eighth resistor and a sixth switch tube. The first end of the seventh resistor is used to receive the input voltage of the wake-up circuit 401; the first end of the eighth resistor is coupled to the second end of the seventh resistor, and the second end of the eighth resistor is coupled to the first end of the fifth switch tube; the first end of the sixth switch tube outputs the wake-up signal when the sixth switch tube is turned on, the second end of the sixth switch tube is coupled to the second end of the seventh resistor, and the third end of the sixth switch tube is coupled to the first end of the seventh resistor. Fig. 9 shown.

[0099] The sixth switch tube is a PNP transistor, a P-metal-oxide-semiconductor (PMOS) or other devices with similar functions. When the voltage difference between the second end and the third end is less than a certain value, the sixth switch tube is in a conducting state. The second end of the sixth switch tube is a control end, for example, it can be the base of the PNP transistor or the gate of the PMOS.

[0100] After the fifth switch tube in the trigger level conversion circuit is turned on, the second end of the sixth switch tube is grounded through the eighth resistor and R5, so that the voltage difference between the second end and the third end is reduced, so that the sixth switch tube is turned on and the wake-up signal is output. The wake-up signal can be understood as a conversion from a low level to a high level, that is, before the sixth switch tube is turned on, the output of the wake-up circuit 401 is a low level, and after the sixth switch tube is turned on, the output of the wake-up circuit 401 is a high level. When the CPU captures the output jump of the wake-up circuit 401, it can be regarded as the CPU receiving the wake-up signal.

[0101] In addition, the wake-up signal output circuit may further include a third capacitor, a first end of the third capacitor is coupled to a first end of the sixth switch tube, and a second end of the third capacitor is used to output the wake-up signal. In this case, the wake-up signal can be understood as a pulse signal, that is, before the sixth switch tube is turned on, the output of the wake-up circuit 401 is low level, and after the sixth switch tube is turned on, the wake-up circuit 401 outputs a pulse signal. This pulse signal received by the CPU can be regarded as a wake-up signal.

[0102] From the above analysis, it can be seen that the wake-up circuit 401 provided in the embodiment of the present application can output a wake-up signal after the gun is inserted into the socket under the three standards of national standard, European standard and American standard, so that the CPU drives the sampling circuit 402 after receiving the wake-up signal, and then performs the gun plug-in state detection. That is, by using the gun plug-in state detection circuit 400 provided in the embodiment of the present application, the gun plug-in state detection in different standards can be realized through one detection circuit, thereby reducing the number of product configurations on the electric vehicle side, which is conducive to the unified design and supply of products. In addition, in the embodiment of the present application, the sampling circuit 402 does not inject a starting voltage when the gun is not inserted into the socket, and is not in a working state, thereby reducing the system power consumption and realizing a low static current of the gun plug-in state detection circuit 400.

[0103] Furthermore, after the wake-up circuit 401 outputs the wake-up signal, the connection between the wake-up circuit 401 and the detection point is disconnected, which can further reduce the system power consumption. Meanwhile, the wake-up circuit 401 will not interfere with the detection of the sampling circuit 402 .

[0104] For example, Fig.10 A possible structural schematic diagram of a gun insertion status detection circuit provided in an embodiment of the present application is shown.

[0105] exist Fig.10 In the illustrated gun plug state detection circuit, before the gun is inserted into the socket, the first switch tube in the sampling circuit 402 is turned off, and the sampling circuit 402 does not work; the second switch tube in the wake-up circuit 401 is not turned on, and the wake-up circuit 401 does not work. At this time, the system achieves low static current and the system power consumption is small.

[0106] In the three scenarios of American standard, national standard S3 closed, and European standard, after the gun is inserted into the socket, the first capacitor starts to charge. Before the fourth switch tube is turned on, the resistance value of the access resistor of the gun state detection circuit can meet the turn-on condition of the fifth switch tube, the fifth switch tube is turned on, and the wake-up circuit 401 outputs a wake-up signal.

[0107] In the scenario where the national standard S3 is not closed, after the gun is inserted into the socket, the first capacitor starts to charge. Before the fourth switch tube is turned on, the resistance value of the access resistor of the gun state detection circuit cannot meet the conduction condition of the fifth switch tube, the fifth switch tube is not turned on, and the wake-up circuit 401 does not output a wake-up signal; after the first resistor is charged for a set time, the fourth switch tube is turned on and the third resistor is short-circuited. At this time, the resistance value of the access resistor of the gun state detection circuit can meet the conduction condition of the fifth switch tube, the fifth switch tube is turned on, and the wake-up circuit 401 outputs a wake-up signal.

[0108] Regardless of the standard, after the wake-up circuit 401 outputs the wake-up signal to the CPU, the CPU controls the first switch tube in the sampling circuit 402 to be turned on, the sampling circuit 402 injects the starting voltage, and the CPU starts the gun insertion status detection; at the same time, the CPU sets the drive of the third switch tube to high, the third switch tube is turned on, and the wake-up circuit 401 is disconnected from the detection point.

[0109] In addition, the present application also provides a gun insertion state detection circuit. Fig.11 The gun insertion state detection circuit 1100 includes a first resistor 1101 , a second resistor 1102 and a switch tube 1103 .

[0110] Among them, the first end of the first resistor 1101 is used to inject a starting voltage. After the starting voltage is injected, the level of the detection point of the gun plug-in status detection circuit 1100 is used to indicate the gun plug-in status; the first end of the second resistor 1102 is coupled with the second end of the first resistor 1101, and the second end of the second resistor 1102 is coupled with the detection point; the first end of the switch tube 1103 outputs a wake-up signal when the switch tube 1103 is turned on, the second end of the switch tube 1103 is coupled with the second end of the first resistor 1101, and the third end of the switch tube 1103 is coupled with the first end of the first resistor 1101, and the wake-up signal is used to trigger the CPU to collect the level of the detection point.

[0111] The switch tube 1103 is a PNP transistor, a PMOS or other devices with similar functions. When the voltage difference between the second terminal and the third terminal is less than a certain value, the switch tube 1103 is in a conducting state. The second terminal of the switch tube 1103 is a control terminal, for example, it can be the base of a PNP transistor or the gate of a PMOS.

[0112] Specifically, the resistance values ​​of the first resistor 1101 and the second resistor 1102 satisfy the following condition: when the plug gun is not connected to the socket, the switch tube 1103 is in an off state, and when the plug gun is connected to the socket, the switch tube 1103 is in an on state.

[0113] That is to say, in the embodiment of the present application, the resistance values ​​of the first resistor 1101 and the second resistor 1102 can be adjusted so that under different standards, when the gun is inserted into the socket, the resistance value of the access resistor of the gun state detection circuit 1100 can meet the conduction condition of the switch tube 1103. After the switch tube 1103 is turned on, the CPU receives the wake-up signal and then determines the gun state by collecting the level of the detection point.

[0114] In addition, the gun plug state detection circuit 1100 may further include a level conversion unit, which is used to convert the output voltage of the power battery into a starting voltage and inject it into the first end of the first resistor, such as Fig.12 shown.

[0115] In an electric vehicle, the output voltage of the power battery is a fixed value, such as 12V. This voltage value may not meet the voltage required for the gun plug state detection circuit 1100 to work. Therefore, the output voltage of the power battery can be converted through a level conversion unit so that the converted voltage (for example, 5V) meets the voltage requirement for the gun plug state detection circuit 1100 to work.

[0116] In summary, the gun plug state detection circuit 1100 provided in the embodiment of the present application can output a wake-up signal after the gun is inserted into the socket under the three standards of national standard, European standard and American standard. After receiving the wake-up signal, the CPU collects the voltage of the detection point and then determines the gun plug state detection. That is, the gun plug state detection circuit 1100 provided in the embodiment of the present application can be implemented in different standards through one detection circuit, thereby reducing the number of product configurations on the electric vehicle side, which is conducive to the unified design and supply of products.

[0117] The present application also provides a controller. Fig.13 The controller 1300 includes the aforementioned gun-insertion state detection circuit 1301 , which may be the aforementioned gun-insertion state detection circuit 400 or the gun-insertion state detection circuit 1100 .

[0118] In actual applications, depending on the configuration in different vehicles, the controller 1300 can be a motor controller or a charging controller.

[0119] The present application also provides a vehicle. Fig.14 , the vehicle includes a CPU 1401 and the aforementioned controller 1300 .

[0120] In practical applications, CPU 1401 may be a vehicle controller or a part of a vehicle controller.

[0121] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A gun insertion status detection circuit, characterized in that: It includes a wake-up circuit and a sampling circuit, wherein the wake-up circuit is used to output a wake-up signal to trigger a central processing unit (CPU) to drive the sampling circuit, and the sampling circuit is used to inject a start voltage under the drive of the CPU. After the start voltage is injected, the level of the detection point of the sampling circuit is used to indicate the gun insertion state; The wake-up circuit comprises: A wake-up function enabling circuit, used to connect the detection point with the wake-up circuit when the plug gun is connected to the socket; A delay circuit, the delay circuit comprising a fourth switch tube and a first capacitor, wherein two ends of the first capacitor are connected across the second end and the third end of the fourth switch tube; the first capacitor starts to charge after the plug gun is inserted into the socket, and after a preset charging time, the voltage difference between the second end and the third end of the fourth switch tube meets the conduction condition of the fourth switch tube, and the fourth switch tube is turned on; a trigger level conversion circuit, configured to trigger the wake-up signal output circuit to output the wake-up signal when the fourth switch tube in the delay circuit is not turned on, when the resistance value of the access resistor of the gun plug state detection circuit is less than the first resistance value; and to trigger the wake-up signal output circuit to output the wake-up signal when the fourth switch tube in the delay circuit is turned on, when the resistance value of the access resistor of the gun plug state detection circuit is greater than the second resistance value; The wake-up signal output circuit is used to output the wake-up signal.

2. The circuit according to claim 1, characterized in that The wake-up signal is also used to trigger the CPU to collect the level of the detection point.

3. The circuit according to claim 1 or 2, characterized in that The wake-up circuit is further configured to disconnect the detection point under the control of the CPU after outputting the wake-up signal.

4. The circuit according to any one of claims 1 to 3, characterized in that: The wake-up function enabling circuit is further configured to disconnect the detection point from the wake-up circuit under the control of the CPU after the wake-up signal output circuit outputs the wake-up signal.

5. The circuit according to any one of claims 1 to 4, characterized in that: The sampling circuit comprises: a first switch tube, wherein a first end of the first switch tube is used to input the startup voltage, and a second end of the first switch tube is coupled to the CPU; A first resistor, wherein a first end of the first resistor is coupled to the third end of the first switch tube, and a second end of the first resistor is coupled to the detection point.

6. The circuit according to claim 5, characterized in that The first switch tube is an NPN transistor or an NMOS.

7. The circuit according to any one of claims 1 to 6, characterized in that: The wake-up function enabling circuit comprises: a second switch tube, wherein a first end of the second switch tube is coupled to the delay circuit and the trigger level conversion circuit, a second end of the second switch tube is coupled to a first end of a third switch tube, and a third end of the second switch tube is coupled to the detection point; a third switch tube, wherein a second end of the third switch tube is coupled to the CPU, and a third end of the third switch tube is grounded; A second resistor, wherein a first end of the second resistor is coupled to a first end of the second switch tube, and a second end of the second resistor is coupled to a first end of the third switch tube.

8. The circuit according to claim 7, characterized in that The delay circuit further comprises: a third resistor, wherein a first end of the third resistor is respectively coupled to the trigger level conversion circuit and a first end of the fourth switch tube, and a second end of the third resistor is respectively coupled to a first end of the first capacitor and a second end of the fourth switch tube; A second capacitor, wherein a first end of the second capacitor is respectively coupled with a second end of the first capacitor and a third end of the fourth switch tube, and a second end of the second capacitor is coupled with the trigger level conversion circuit.

9. The circuit according to claim 8, characterized in that The trigger level conversion circuit comprises: a fourth resistor, wherein a first end of the fourth resistor is used to receive an input voltage of the wake-up circuit, and a second end of the fourth resistor is coupled to a second end of the second capacitor; a fifth resistor, wherein a first end of the fifth resistor is used to receive an input voltage of the wake-up circuit, and a second end of the fifth resistor is coupled to a first end of the third resistor; a sixth resistor, a first end of the sixth resistor being coupled to a second end of the fourth resistor, and a second end of the sixth resistor being grounded; A fifth switch tube, wherein a first end of the fifth switch tube is coupled to the wake-up signal output circuit, a second end of the fifth switch tube is coupled to the second end of the fourth resistor, and a third end of the fifth switch tube is coupled to the first end of the second switch tube.

10. The circuit according to claim 9, characterized in that The wake-up signal output circuit comprises: a seventh resistor, wherein a first end of the seventh resistor is used to receive an input voltage of the wake-up circuit; an eighth resistor, wherein a first end of the eighth resistor is coupled to a second end of the seventh resistor, and a second end of the eighth resistor is coupled to a first end of the fifth switch tube; A sixth switch tube, wherein the first end of the sixth switch tube outputs the wake-up signal when the sixth switch tube is turned on, the second end of the sixth switch tube is coupled to the second end of the seventh resistor, and the third end of the sixth switch tube is coupled to the first end of the seventh resistor.

11. The circuit according to claim 10, characterized in that The wake-up signal output circuit further includes: A third capacitor, wherein a first end of the third capacitor is coupled to a first end of the sixth switch tube, and a second end of the third capacitor is used to output the wake-up signal.

12. The circuit according to claim 10 or 11, characterized in that The second switch tube, the third switch tube, the fourth switch tube and the fifth switch tube are NPN transistors or NMOS; the sixth switch tube is a PNP transistor or PMOS.

13. A gun insertion status detection circuit, characterized in that: include: a first resistor, wherein a first end of the first resistor is used to inject a starting voltage, and after the starting voltage is injected, a level of a detection point of the gun insertion state detection circuit is used to indicate a gun insertion state; a second resistor, a first end of the second resistor being coupled to a second end of the first resistor, and a second end of the second resistor being coupled to the detection point; A switch tube, wherein the first end of the switch tube outputs a wake-up signal when the switch tube is turned on, the second end of the switch tube is coupled to the second end of the first resistor, the third end of the switch tube is coupled to the first end of the first resistor, and the wake-up signal is used to trigger the CPU to collect the level of the detection point.

14. The circuit according to claim 13, characterized in that The resistance values ​​of the first resistor and the second resistor meet the following conditions: When the gun plug is not connected to the socket, the switch tube is in an off state, and when the gun plug is connected to the socket, the switch tube is in an on state.

15. The circuit according to claim 13 or 14, characterized in that Also includes: The level conversion unit is used to convert the output voltage of the power battery into the starting voltage and inject it into the first end of the first resistor.

16. A controller, characterized in that: Comprising the circuit as claimed in any one of claims 1 to 15.

17. A vehicle, characterized in that: It comprises a CPU and a controller as claimed in claim 16.

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