Charging guiding circuit, vehicle and charging guiding method

Abstract

The invention relates to a charging guide circuit, a vehicle and a charging guide method, and the circuit comprises a switch assembly and a first detection assembly which is used for detecting the voltage of a CC1 port of a vehicle socket; the second detection assembly is used for detecting the CC2 port voltage of the vehicle socket; the control assembly is used for controlling the BMS to be initialized when the charging gun is inserted into a vehicle and the CC1 port voltage is in a first preset voltage interval, controlling the switch assembly to be switched from the first switch state to the second switch state after initialization is completed, and controlling the switch assembly to be switched from the first switch state to the second switch state when the CC1 port voltage is in a second preset voltage interval and the CC2 port voltage is in a third preset voltage interval. And controlling the switch assembly to be switched from the second switch state to a third switch state, and starting to charge the vehicle. Therefore, the problem that in order to achieve high-power charging at present, the whole vehicle framework of the vehicle needs to be adjusted, even function definition needs to be changed again, and a controller needs to be redesigned, so that the cost is high is solved, and the cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle charging, and in particular to a charging guidance circuit, a vehicle and a charging guidance method. Background Art

[0002] With the popularity of electric vehicles, electric car owners generally have concerns about charging when traveling by car. Charging operators are accelerating the popularization of high-power charging and supercharging piles, and super charging has become a new direction for the development of the industry.

[0003] However, in order to achieve high-power charging at present, the vehicle's overall architecture is generally adjusted, and even the function definition needs to be changed and the controller needs to be redesigned, resulting in high costs that need to be solved urgently. Summary of the invention

[0004] The present invention provides a charging guidance circuit, a vehicle and a charging guidance method, which can realize the super charging function through an externally designed super charging guidance circuit without changing the original vehicle model controller, thereby solving the problem that the vehicle structure needs to be adjusted to realize high-power charging, and even the function definition needs to be changed and the controller needs to be redesigned, resulting in high costs, thereby greatly reducing costs.

[0005] To achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention proposes a charging guidance circuit, comprising: a switch component, the switch component comprising first to third switch states, wherein the first switch state is a fully disconnected state; a first detection component, used to detect the CC1 port voltage of the vehicle socket; a second detection component, used to detect the CC2 port voltage of the vehicle socket; a control component, the control component is used to control the BMS to initialize when the charging gun is inserted into the vehicle and the CC1 port voltage is in a first preset voltage range, and after the initialization is completed, control the switch component to switch from the first switch state to the second switch state, and when the CC1 port voltage is in the second preset voltage range and the CC2 port voltage is in the third preset voltage range, control the switch component to switch from the second switch state to the third switch state to start charging the vehicle.

[0006] Further, in some embodiments, the switch component includes: a first resistor, one end of the first resistor is connected to the ground node, and the other end of the first resistor is connected to the CC1 port of the vehicle socket; a second resistor, one end of the second resistor is connected to the ground node; a first switch, one end of the first switch is connected to the other end of the second resistor, and the other end of the first switch is connected to the other end of the first resistor; a third resistor, one end of the third resistor is connected to the ground node; a second switch, one end of the second switch is connected to the other end of the third resistor, and the other end of the second switch is connected to the other end of the first switch; a fourth resistor, one end of the fourth resistor is connected to a power node; a third switch, one end of the third switch is connected to the other end of the fourth resistor, and the other end of the third switch is connected to the CC2 port of the vehicle socket.

[0007] Further, in some embodiments, the second switch state is that the first switch is in a closed state, the second switch is in the closed state, and the third switch is in an open state; the third switch state is that the first switch is in a closed state, the second switch is in the closed state, and the third switch is in the closed state.

[0008] Furthermore, in some embodiments, the control component is also used to: generate a charging failure signal when the charging gun is inserted into the vehicle and the CC1 port voltage is not in the first preset voltage range, or, after controlling the switch component to switch from the first switch state to the second switch state, the CC1 port voltage is not in the second preset voltage range or the CC2 port voltage is not in the third preset voltage range, and control the vehicle to provide a charging failure reminder based on the charging failure signal.

[0009] Further, in some embodiments, the lower limit value of the first preset voltage interval is greater than the upper limit value of the second preset voltage interval, and the lower limit value of the first preset voltage interval is greater than the upper limit value of the third preset voltage interval.

[0010] According to the charging guidance circuit proposed in the embodiment of the present invention, when the charging gun is inserted into the vehicle and the CC1 port voltage is at the first preset voltage, the control switch component switches the first switch state to the second switch state, and when the CC1 port voltage is in the second preset voltage interval and the CC2 port voltage is in the third preset voltage interval, the control switch component switches from the second switch state to the third switch state, and then charges the vehicle. In this way, the current problem of high cost caused by the need to adjust the vehicle's entire architecture, even to re-change the function definition, and to redesign the controller in order to achieve high-power charging is solved, and the cost is greatly reduced.

[0011] A second aspect of the present invention provides a vehicle, which includes the above-mentioned charging guidance circuit.

[0012] The vehicle proposed in accordance with the embodiment of the present invention, through the above-mentioned charging guidance circuit, solves the problem that the vehicle's entire architecture needs to be adjusted to achieve high-power charging, and even the function definition needs to be changed, and the controller needs to be redesigned, resulting in high costs, thereby greatly reducing costs.

[0013] The third aspect of the present invention provides a charging guidance method, which adopts the above-mentioned charging guidance circuit, wherein the method includes the following steps: after the charging gun is inserted into the vehicle, detecting the CC1 port voltage of the vehicle socket; if the CC1 port voltage of the vehicle socket is in a first preset voltage range, controlling the BMS to initialize, and after the initialization is completed, controlling the switch component to switch from the first switch state to the second switch state; if the CC1 port voltage is in the second preset voltage range and the CC2 port voltage is in the third preset voltage range, controlling the switch component to switch from the second switch state to the third switch state to start charging the vehicle.

[0014] Further, when the charging gun is inserted into the vehicle and the CC1 port voltage is not in the first preset voltage range, or after the switch component is controlled to switch from the first switch state to the second switch state, the CC1 port voltage is not in the second preset voltage range or the CC2 port voltage is not in the third preset voltage range, a charging failure signal is generated; and the vehicle is controlled to provide a charging failure reminder based on the charging failure signal.

[0015] Further, in some embodiments, controlling the vehicle to provide a charging failure reminder based on the charging failure signal includes: determining an acoustic reminder instruction and / or an optical reminder instruction according to the charging failure signal; sending the acoustic reminder instruction to an acoustic device of the vehicle for an acoustic reminder, and / or sending the optical reminder instruction to an optical device of the vehicle for an optical reminder.

[0016] Further, in some embodiments, the lower limit value of the first preset voltage interval is greater than the upper limit value of the second preset voltage interval, and the lower limit value of the first preset voltage interval is greater than the upper limit value of the third preset voltage interval.

[0017] According to the charging guidance method proposed in the embodiment of the present invention, when the charging gun is inserted into the vehicle and the CC1 port voltage is at the first preset voltage, the control switch component switches the first switch state to the second switch state, and when the CC1 port voltage is in the second preset voltage interval and the CC2 port voltage is in the third preset voltage interval, the control switch component switches from the second switch state to the third switch state, and then charges the vehicle. In this way, the current problem of high cost caused by the need to adjust the vehicle's entire architecture, even to re-change the function definition, and to redesign the controller in order to achieve high-power charging is solved, and the cost is greatly reduced.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 A schematic diagram of a charging guidance system provided according to an embodiment of the present invention;

[0021] Figure 2 A block diagram of a charging guidance circuit provided according to an embodiment of the present invention;

[0022] Figure 3 A flowchart of a charging guidance method provided according to a specific embodiment of the present invention;

[0023] Figure 4 The figure is a flow chart of a charging guidance method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] The following describes a charging guidance circuit, a vehicle and a charging guidance method according to an embodiment of the present invention with reference to the accompanying drawings. First, a charging guidance circuit according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0026] Before introducing the charging guidance circuit according to the embodiment of the present invention, the application of the charging guidance circuit according to the embodiment of the present invention in the architecture of a whole vehicle is briefly introduced.

[0027] like Figure 1 As shown, Figure 1 It is a schematic diagram of a vehicle's charging guidance system, which includes a BMS (Battery Management System), a VCU (Vehicle Control Unit), a CCU (Charge Control Unit), a CPC and a charging guidance circuit.

[0028] Among them, BMS includes: battery cell monitoring, SOC (State of Charge) estimation and cell voltage balancing, etc.; VCU includes: collecting vehicle-related signals to judge driving intentions, tracking and monitoring the lower-level component controllers through CAN communication, and coordinating management. Among them, vehicle-related signals include: vehicle parking status, vehicle battery remaining power and other information; driving intentions include: forward, backward and left and right turns, etc.; CCU includes: charging guidance and charging management functions, including GBT18487.1-2015 related charging guidance and management circuits, including slow charging related CC / CP circuits and fast charging related CC2 / A+ circuits; the functions of CPC and charging guidance circuits will be explained in detail below.

[0029] The following will be combined Figure 1 and Figure 2 The functions of CPC and the charging guidance circuit are explained in detail.

[0030] Figure 2 The figure is a block diagram of a charging guidance circuit provided according to an embodiment of the present invention.

[0031] like Figure 2 As shown, the charging guidance circuit 10 includes: a switch component 100 , a first detection component 200 , a second detection component 300 and a control component 400 .

[0032] The switch assembly 100 includes: first to third switch states, the first switch state is a fully disconnected state. The first detection assembly 200 is used to detect the voltage of the CC1 port of the vehicle socket; the second detection assembly 300 is used to detect the voltage of the CC2 port of the vehicle socket; the control assembly 400 is used to control the BMS to initialize when the charging gun is inserted into the vehicle and the CC1 port voltage is in the first preset voltage range, and after the initialization is completed, control the switch assembly to switch from the first switch state to the second switch state, and when the CC1 port voltage is in the second preset voltage range and the CC2 port voltage is in the third preset voltage range, control the switch assembly to switch from the second switch state to the third switch state to start charging the vehicle.

[0033] The second switch state is that the first switch S2' is in a closed state, the second switch S2 is in a closed state and the third switch Sv is in an open state; the third switch state is that the first switch S2' is in a closed state, the second switch S2 is in a closed state and the third switch Sv is in a closed state.

[0034] In some embodiments, the lower limit value of the first preset voltage interval is greater than the upper limit value of the second preset voltage interval, and the lower limit value of the first preset voltage interval is greater than the upper limit value of the third preset voltage interval.

[0035] Wherein, in some embodiments, Figure 1 As shown, the switch assembly 100 further includes: a first resistor R3, a second resistor R4', a first switch S2', a third resistor R4, a second switch S2, a fourth resistor Rv and a third switch Sv. Among them, one end of the first resistor R3 is connected to the ground node, and the other end of the first resistor R3 is connected to the CC1 port of the vehicle socket; one end of the second resistor R4' is connected to the ground node; one end of the first switch S2' is connected to the other end of the second resistor R4', and the other end of the first switch S2' is connected to the other end of the first resistor R3; one end of the third resistor R4 is connected to the ground node; one end of the second switch S2 is connected to the other end of the third resistor R4, and the other end of the second switch S2 is connected to the other end of the first switch S2'; one end of the fourth resistor Rv is connected to the power node; one end of the third switch Sv is connected to the other end of the fourth resistor Rv, and the other end of the third switch Sv is connected to the CC2 port of the vehicle socket.

[0036] Among them, the first preset voltage interval, the second preset voltage interval and the third preset voltage interval can all be suitable preset voltage intervals simulated by a computer, or can be preset voltage intervals determined by relevant practitioners through experiments in the laboratory, and no specific limitation is made here.

[0037] It should be understood that, in conjunction with Figure 1 and Figure 2 In an embodiment of the present invention, when the charging gun of the charging pile is inserted into the vehicle, the CC1 port voltage of the vehicle socket can be detected by the first detection component 200. If the CC1 port voltage is in the first preset voltage interval, it can be preliminarily determined that the charging pile circuit and the vehicle end circuit are connected normally. If the CC1 port voltage is not in the first preset voltage interval, it can be determined that the charging pile circuit and the vehicle end circuit are abnormally connected.

[0038] Further, after determining that the connection between the charging pile and the vehicle-end circuit is normal, the embodiment of the present invention can control the first switch S2' and the third switch Sv to be in a closed state. At this time, the first resistor R3 and the second resistor R4' are connected in parallel to reduce the CC1 port voltage. The embodiment of the present invention can detect the CC1 port voltage of the vehicle socket again through the first detection component 200. If the re-detected CC1 port voltage is not in the second preset interval, it can be determined that the connection between the charging pile and the vehicle-end circuit is abnormal. If the re-detected CC1 port voltage is in the second preset interval, it is determined whether the CC2 port voltage of the vehicle socket detected by the second detection component 300 is in the third preset interval. If the CC2 port voltage of the vehicle socket detected by the second detection component 300 is in the third preset interval, it is determined that the vehicle is ready and the second switch S2 is controlled to be in a closed state.

[0039] It should be noted that, in the embodiment of the present invention, when it is preliminarily determined that the charging pile and the vehicle-end circuit are both connected normally, an initialization signal can be sent to the control BMS through the control component 400, so that the BMS performs an initialization action.

[0040] Therefore, the above-mentioned charging guidance circuit solves the problem of high cost caused by the need to adjust the vehicle architecture and even to redefine the function and redesign the controller in order to achieve high-power charging, thereby greatly reducing costs.

[0041] In order to timely understand whether the connection is completed during the charging process, the embodiment of the present invention can also provide a reminder when the charging connection is abnormal.

[0042] As a possible implementation method, in one embodiment, the control component 400 is also used to generate a charging failure signal when the charging gun is inserted into the vehicle and the CC1 port voltage is not in the first preset voltage range, or, after the control switch component 100 is switched from the first switch state to the second switch state, the CC1 port voltage is not in the second preset voltage range or the CC2 port voltage is not in the third preset voltage range, and control the vehicle to provide a charging failure reminder based on the charging failure signal.

[0043] It should be understood that, in conjunction with Figure 1 and Figure 2When the charging gun is inserted into the vehicle, if the charging pile circuit and the vehicle-end circuit are connected normally, the CC1 port voltage should be in the first preset voltage range. Therefore, if the CC1 port voltage is not in the first preset voltage when the charging gun is inserted into the vehicle, it means that the connection between the charging pile circuit and the vehicle-end circuit is abnormal. In order to facilitate the reminder to the user, the embodiment of the present invention can remind when the charging connection is abnormal; similarly, after the control switch component 100 is switched from the first switch state to the second switch state (that is, the first switch S2' and the third switch Sv are adjusted to the closed state, and the second switch S2 remains in the open state), if the CC1 port voltage is not in the second preset voltage, or the CC2 port voltage is not in the third preset voltage range, the embodiment of the present invention will also generate a charging failure signal, and control the vehicle to remind the charging failure based on the charging failure signal.

[0044] It should be noted that when controlling the vehicle to give a charging failure reminder based on a charging failure signal, the embodiment of the present invention may give an acoustic reminder through an acoustic device, or give an optical reminder through an optical device, or give an optical reminder through an optical device at the same time as giving an acoustic reminder through an acoustic device.

[0045] For example, there can be many ways of reminding. When controlling the vehicle to provide a charging failure reminder based on a charging failure signal, an embodiment of the present invention can display the text "Charging Failure" on the central control screen of the vehicle's dashboard, or can emit a warning sound "Charging Failure" through the vehicle's warning horn. In addition, an embodiment of the present invention can control the central control screen to display the text "Charging Failure" while controlling the vehicle's warning horn to emit a warning sound "Charging Failure", thereby achieving the purpose of multi-directional reminders and serving as a reminder for passengers.

[0046] The functions of CPC are described in detail below in conjunction with specific embodiments.

[0047] Specifically, the embodiment of the present invention can use CPC as the control component 400 of the embodiment of the present invention, and CPC can be provided with two acquisition terminals, one of which is connected to the first acquisition component 200, and the other is connected to the second acquisition component 300. After the first detection component 200 detects the CC1 port voltage and the second detection component 300 detects the CC2 port voltage, the embodiment of the present invention can use the two acquisition terminals to collect the CC1 port voltage and the CC2 port voltage, so as to perform subsequent control of the first to third switches, wherein the embodiment of the present invention can control the first switch S2', the second switch S2 and the third switch Sv respectively through three high-side drivers. In addition, the CPC of the embodiment of the present invention can also be provided with two external wake-ups and one high-side output wake-up CCU, for example, one external wake-up is for the charging boot circuit to wake up the CPC, and one external wake-up is for the VCU to wake up the CPC.

[0048] It should be noted that, in order to save costs, the embodiment of the present invention can use a BMS mainboard to replace the CPC, and the BMS mainboard resources can meet the design requirements of the CPC.

[0049] In addition, the embodiment of the present invention can design the charging guidance circuit 10 as an adapter board. For example, the embodiment of the present invention can perform breadboard welding on the charging guidance circuit according to the latest super charging national standard (GBT18487.1-2023 and GB / T 27930-ChaoJi for communication protocol software development) to obtain an adapter board. The adapter board, CPC and other controllers can be connected through a wiring harness, and the wiring harness can be as follows Figure 1 To facilitate installation, the embodiment of the present invention can also design a bracket to fix the CPC and the adapter plate. The vehicle-side BMS needs to develop communication protocol software according to GB / T 27930-ChaoJi; CPC needs to shield all other CAN signal transmissions.

[0050] In order to enable those skilled in the art to further understand the charging guidance circuit of the embodiment of the present invention, Figure 3 The charging guidance method shown is described in detail.

[0051] like Figure 3 As shown, the charging guidance circuit method includes the following steps:

[0052] In step S301 , a charging gun is inserted into a vehicle.

[0053] In step S302, the charging pile and the vehicle end both detect the voltage of the CC1 port.

[0054] In step S303, it is determined whether the voltage of the CC1 port is 10.8V. If so, step S304 is executed; otherwise, step S307 is executed.

[0055] It should be noted that 10.8V is a value obtained through testing, and the first preset voltage interval may be (10V, 11V). The first preset voltage interval and the above 10.8V are not intended to limit the present application.

[0056] In step S304, the BMS module is initialized, and the first switch S2' and the third switch Sv are closed simultaneously.

[0057] In step S305, it is determined whether the voltage at the CC2 port is 2.34V and whether the voltage at the CC2 port is 2.5V. If yes, step S306 is executed; otherwise, step S307 is executed.

[0058] It should be noted that 2.34V and 2.5V are both values ​​obtained through testing, and the second preset voltage interval and the third preset voltage interval can both be (2V, 3V). The above-mentioned second preset voltage interval, third preset voltage interval, 2.34V and 2.5V are not intended to limit the present application.

[0059] In step S306, the pile-end circuit and the vehicle-end circuit are completely closed, the vehicle is ready for charging, and the vehicle is charged.

[0060] In step S307, a fault is reported.

[0061] According to the charging guidance circuit proposed in the embodiment of the present invention, when the charging gun is inserted into the vehicle and the CC1 port voltage is at the first preset voltage, the control switch component switches the first switch state to the second switch state, and when the CC1 port voltage is in the second preset voltage interval and the CC2 port voltage is in the third preset voltage interval, the control switch component switches from the second switch state to the third switch state, and then charges the vehicle. In this way, the current problem of high cost caused by the need to adjust the vehicle's entire architecture, even to re-change the function definition, and to redesign the controller in order to achieve high-power charging is solved, and the cost is greatly reduced.

[0062] An embodiment of the present invention further provides a vehicle, comprising the above-mentioned charging guidance circuit.

[0063] The vehicle proposed in accordance with the embodiment of the present invention, through the above-mentioned charging guidance circuit, solves the problem that the vehicle's entire architecture needs to be adjusted to achieve high-power charging, and even the function definition needs to be changed, and the controller needs to be redesigned, resulting in high costs, thereby greatly reducing costs.

[0064] Next, a charging guidance method according to an embodiment of the present invention is described with reference to the accompanying drawings.

[0065] In this embodiment, Figure 4 The charging guidance method shown can be used Figure 2 The charging guidance circuit shown in the embodiment.

[0066] Specifically, Figure 4 As shown, the charging guidance method of the embodiment of the present invention includes the following steps:

[0067] In step S401, after the charging gun is inserted into the vehicle, the voltage of the CC1 port of the vehicle socket is detected;

[0068] In step S402, if the voltage of the CC1 port of the vehicle socket is in the first preset voltage range, the BMS is controlled to be initialized, and after the initialization is completed, the switch component is controlled to switch from the first switch state to the second switch state;

[0069] In step S403, if the CC1 port voltage is in the second preset voltage range and the CC2 port voltage is in the third preset voltage range, the switch component is controlled to switch from the second switch state to the third switch state to start charging the vehicle.

[0070] Further, in some embodiments, when the charging gun is inserted into the vehicle and the CC1 port voltage is not in the first preset voltage range, or after the control switch assembly is switched from the first switch state to the second switch state, the CC1 port voltage is not in the second preset voltage range or the CC2 port voltage is not in the third preset voltage range, a charging failure signal is generated; and the vehicle is controlled to provide a charging failure reminder based on the charging failure signal.

[0071] Further, in some embodiments, controlling the vehicle to provide a charging failure reminder based on the charging failure signal includes: determining an acoustic reminder instruction and / or an optical reminder instruction according to the charging failure signal; sending an acoustic reminder instruction to an acoustic device of the vehicle for an acoustic reminder, and / or sending an optical reminder instruction to an optical device of the vehicle for an optical reminder.

[0072] Further, in some embodiments, the lower limit value of the first preset voltage interval is greater than the upper limit value of the second preset voltage interval, and the lower limit value of the first preset voltage interval is greater than the upper limit value of the third preset voltage interval.

[0073] Among them, the first preset voltage interval, the second preset voltage interval and the third preset voltage interval can all be suitable preset voltage intervals simulated by a computer, or can be preset voltage intervals determined by relevant practitioners through experiments in the laboratory, and no specific limitation is made here.

[0074] According to the charging guidance method provided by the embodiment of the present invention, when the charging gun is inserted into the vehicle and the CC1 port voltage is at the first preset voltage, the control switch component switches the first switch state to the second switch state, and when the CC1 port voltage is in the second preset voltage interval and the CC2 port voltage is in the third preset voltage interval, the control switch component switches from the second switch state to the third switch state, and then charges the vehicle. This solves the problem that the vehicle architecture needs to be adjusted to achieve high-power charging, and even the function definition needs to be changed, and the controller needs to be redesigned, resulting in high costs, and the cost is greatly reduced.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A charging guide circuit, characterized in that: include: A switch assembly, the switch assembly comprising first to third switch states, wherein the first switch state is a fully disconnected state; A first detection component, used to detect the voltage of the CC1 port of the vehicle socket; A second detection component, used to detect the voltage of the CC2 port of the vehicle socket; A control component, wherein the control component is used to control the BMS to initialize when the charging gun is inserted into the vehicle and the CC1 port voltage is in a first preset voltage range, and after the initialization is completed, control the switch component to switch from the first switch state to the second switch state, and when the CC1 port voltage is in the second preset voltage range and the CC2 port voltage is in a third preset voltage range, control the switch component to switch from the second switch state to the third switch state to start charging the vehicle.

2. The charging guide circuit according to claim 1, characterized in that: The switch assembly comprises: a first resistor, one end of the first resistor being connected to a ground node, and the other end of the first resistor being connected to a CC1 port of the vehicle socket; a second resistor, one end of the second resistor being connected to the ground node; a first switch, wherein one end of the first switch is connected to the other end of the second resistor, and the other end of the first switch is connected to the other end of the first resistor; a third resistor, one end of which is connected to the ground node; a second switch, wherein one end of the second switch is connected to the other end of the third resistor, and the other end of the second switch is connected to the other end of the first switch; a fourth resistor, one end of which is connected to the power supply node; A third switch, one end of the third switch is connected to the other end of the fourth resistor, and the other end of the third switch is connected to the CC2 port of the vehicle socket.

3. The charging guide circuit according to claim 2, characterized in that: The second switch state is that the first switch is in a closed state, the second switch is in the closed state, and the third switch is in an open state; The third switch state is that the first switch is in a closed state, the second switch is in the closed state, and the third switch is in the closed state.

4. The charging guide circuit according to claim 1, characterized in that: The control component is also used to generate a charging failure signal when the charging gun is inserted into the vehicle and the CC1 port voltage is not in the first preset voltage range, or, after controlling the switch component to switch from the first switch state to the second switch state, the CC1 port voltage is not in the second preset voltage range or the CC2 port voltage is not in the third preset voltage range, and control the vehicle to provide a charging failure reminder based on the charging failure signal.

5. The charging guidance circuit according to any one of claims 1 to 4, characterized in that: The lower limit value of the first preset voltage interval is greater than the upper limit value of the second preset voltage interval, and the lower limit value of the first preset voltage interval is greater than the upper limit value of the third preset voltage interval.

6. A vehicle, characterized in that: include: A charging guidance circuit as claimed in any one of claims 1 to 4.

7. A charging guidance method, characterized in that: The charging guidance circuit according to any one of claims 1 to 5 is used, wherein the method comprises: After the charging gun is inserted into the vehicle, detecting the voltage of the CC1 port of the vehicle socket; If the CC1 port voltage of the vehicle socket is in the first preset voltage range, the BMS is controlled to be initialized, and after the initialization is completed, the switch component is controlled to switch from the first switch state to the second switch state; If the CC1 port voltage is within the second preset voltage range and the CC2 port voltage is within the third preset voltage range, the switch component is controlled to switch from the second switch state to the third switch state to start charging the vehicle.

8. The method according to claim 7, characterized in that Also includes: When the charging gun is inserted into the vehicle and the CC1 port voltage is not in the first preset voltage range, or after the switch component is controlled to switch from the first switch state to the second switch state, the CC1 port voltage is not in the second preset voltage range or the CC2 port voltage is not in the third preset voltage range, a charging failure signal is generated; The vehicle is controlled to provide a charging failure reminder based on the charging failure signal.

9. The method according to claim 8, characterized in that The controlling the vehicle to provide a charging failure reminder based on the charging failure signal includes: determining an acoustic reminder instruction and / or an optical reminder instruction according to the charging failure signal; The acoustic reminder instruction is sent to an acoustic device of the vehicle for optical reminder, and / or the optical reminder instruction is sent to an optical device of the vehicle for optical reminder.

10. The method according to claim 8, characterized in that The lower limit value of the first preset voltage interval is greater than the upper limit value of the second preset voltage interval, and the lower limit value of the first preset voltage interval is greater than the upper limit value of the third preset voltage interval.

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