Charging port circuit of automobile charging connector

Abstract

The utility model discloses a charging port circuit of an automobile charging connector, which comprises a circuit board, the circuit board is provided with a direct-current power supply branch, a charging communication branch, a charging connection confirmation branch and a low-voltage auxiliary power supply branch, and the input end of the direct-current power supply branch is connected with a direct-current power supply interface of a charging pile. The output end of the direct-current power supply branch outputs a direct-current power supply signal, the input end of the charging communication branch is connected with a charging communication port of the charging pile, the output end of the charging communication branch outputs a charging communication signal, and the input end of the charging connection confirmation branch is connected with a charging connection confirmation port of the charging pile. The output end of the charging connection confirmation branch outputs a charging connection confirmation signal, the input end of the low-voltage auxiliary power supply branch is connected with a low-voltage auxiliary power supply end of the charging pile, the output end of the low-voltage auxiliary power supply branch outputs a low-voltage auxiliary power supply signal, and an inductor is arranged on the charging communication branch and used for shielding electromagnetic interference and signal noise. Electromagnetic interference and signal noise are shielded, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle charging technology, and in particular to a charging port circuit for an automotive charging connector. Background Technology

[0002] During electric vehicle charging, the S+ and S- signals of the charging connector are used for communication and control of the charging process. However, electromagnetic interference (EMI) and signal noise in the charging environment can lead to unstable communication, affecting charging efficiency and safety.

[0003] Currently, shielded cables or filtering circuits are commonly used to reduce interference, but these methods are costly. Therefore, a low-cost solution is needed to improve the reliability of signal transmission. Summary of the Invention

[0004] This utility model provides a charging port circuit for an automotive charging connector to solve the problem of high cost associated with current methods of shielding electromagnetic interference and signal noise using shielded wires or filtering circuits.

[0005] To achieve the above objectives, in one embodiment, a charging port circuit for an automotive charging connector is provided, comprising a circuit board. The circuit board is provided with: a DC power supply branch, a charging communication branch, a charging connection confirmation branch, and a low-voltage auxiliary power supply branch. The input terminal of the DC power supply branch is used to connect to the DC power interface of a charging pile, and the output terminal of the DC power supply branch is used to output a DC power supply signal. The input terminal of the charging communication branch is used to connect to the charging communication port of the charging pile, and the output terminal of the charging communication branch is used to output a charging communication signal. The input terminal of the charging connection confirmation branch is used to connect to the charging connection confirmation port of the charging pile, and the output terminal of the charging connection confirmation branch is used to output a charging connection confirmation signal. The input terminal of the low-voltage auxiliary power supply branch is used to connect to the low-voltage auxiliary power supply terminal of the charging pile, and the output terminal of the low-voltage auxiliary power supply branch is used to output the low-voltage auxiliary power supply signal.

[0006] An inductor is provided on the charging communication branch to shield against electromagnetic interference and signal noise.

[0007] In one embodiment, the charging communication branch includes: a first charging communication branch, wherein a first inductor is provided on the first charging communication branch, the input end of the first charging communication branch is connected to the first charging communication port of the charging pile, the output end of the first charging communication branch is connected to one end of the first inductor, and the other end of the first inductor is used to output a first charging communication signal.

[0008] In one embodiment, the charging communication branch further includes: a second charging communication branch, wherein a second inductor is provided on the second charging communication branch, the input end of the second charging communication branch is connected to the second charging communication port of the charging pile, the output end of the second charging communication branch is connected to one end of the second inductor, and the other end of the second inductor is used to output a second charging communication signal.

[0009] In one embodiment, the inductance values ​​of both the first inductor and the second inductor are in the range of 1-100. .

[0010] In one embodiment, the first inductor and the second inductor use ferrite or nanocrystalline materials as magnetic cores.

[0011] In one embodiment, the first charging communication branch further includes a first capacitor, which is connected in parallel with the first inductor to form a first filter circuit.

[0012] In one embodiment, the second charging communication branch further includes a second capacitor, which is connected in parallel with the second inductor to form a second filter circuit.

[0013] In one embodiment, the circuit board is further provided with a temperature sensor power supply branch, the input terminal of which is used to receive a temperature signal, and the output terminal of which is used to output the temperature signal.

[0014] In one embodiment, the temperature sensor power supply branch includes: a first temperature sensor power supply branch, on which a first temperature sensor is disposed, the first temperature sensor being used to acquire a first temperature signal from the DC power supply branch, the input terminal of the first temperature sensor power supply branch being connected to the output terminal of the first temperature sensor for receiving the first temperature signal output by the first temperature sensor, and the output terminal of the first temperature sensor power supply branch being used to output the first temperature signal.

[0015] In one embodiment, the temperature sensor power supply branch further includes: a second temperature sensor power supply branch, on which a second temperature sensor is disposed, the second temperature sensor being used to acquire a second temperature signal from the DC power supply branch, the input terminal of the second temperature sensor power supply branch being connected to the output terminal of the second temperature sensor for receiving the second temperature signal output by the second temperature sensor, and the output terminal of the second temperature sensor power supply branch being used to output the second temperature signal.

[0016] The charging port circuit of the aforementioned automotive charging connector uses an inductor on the charging communication branch set on the circuit board to shield electromagnetic interference and signal noise, making the charging communication signal more stable and improving charging safety. Since only an inductor is used, the circuit structure is simpler and the cost is reduced, making it suitable for charging systems of various electric vehicles. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the connection between the branch circuit and the low-voltage connector on the circuit board in one embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram showing the specific layout of each branch on the circuit board in one embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the inductor used in one embodiment of the present invention.

[0021] Reference numerals: 1. Circuit board; 101. Inductor; 1011. First inductor; 1012. Second inductor; 102. First temperature sensor; 103. Second temperature sensor; 11. DC power supply branch; 13. Charging communication branch; 131. First charging communication branch; 132. Second charging communication branch; 14. Charging connection confirmation branch; 141. First charging connection confirmation branch; 142. Second charging connection branch; 15. Low-voltage auxiliary branch; 17. Temperature sensor power supply branch; 171. First temperature sensor power supply branch; 172. Second temperature sensor power supply branch; 173. Temperature sensor ground wire. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0023] It should be understood that this invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art. In the drawings, for clarity, the dimensions of layers and regions, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0024] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this utility model, the first element, component, area, layer, or portion discussed below may be referred to as the second element, component, area, layer, or portion.

[0025] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0026] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0027] To fully understand this utility model, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this utility model. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0028] In one embodiment, a charging port circuit for an automotive charging connector is provided, such as... Figure 1 As shown, the device includes a circuit board 1, on which are arranged a DC power supply branch 11, a charging communication branch 13, a charging connection confirmation branch 14, and a low-voltage auxiliary power supply branch 15. The input terminal of the DC power supply branch 11 is used to connect to the DC power interface of the charging pile, and the output terminal of the DC power supply branch 11 is used to output a DC power supply signal. The input terminal of the charging communication branch 13 is used to connect to the charging communication port of the charging pile, and the output terminal of the charging communication branch 13 is used to output a charging communication signal. The input terminal of the charging connection confirmation branch 14 is used to connect to the charging connection confirmation port of the charging pile, and the output terminal of the charging connection confirmation branch 14 is used to output a charging connection confirmation signal. The input terminal of the low-voltage auxiliary power supply branch 15 is used to connect to the low-voltage auxiliary power supply terminal of the charging pile, and the output terminal of the low-voltage auxiliary power supply branch 15 is used to output the low-voltage auxiliary power supply signal.

[0029] The charging communication branch 13 is equipped with an inductor 101 to shield electromagnetic interference and signal noise.

[0030] Among them, the DC power supply branch 11 consists of the following from top to bottom: DC power supply positive branch (DC+), DC power supply negative branch (DC-) and vehicle ground wire (PE).

[0031] The DC power supply positive branch (DC+) is the main input path for charging current, transmitting the DC power generated by the charging pile to the battery system of the electric vehicle to provide the current required for charging the battery. During the charging process, the DC power supply positive branch (DC+) is a key channel for data matching between the charging pile and the vehicle to determine the battery's voltage requirements.

[0032] The negative branch of the DC power supply (DC-) is the return path of the current, ensuring that the charging current can flow smoothly between the charging pile and the electric vehicle. It also participates in the control process of the charging current. By cooperating with the positive terminal, it can achieve precise adjustment of the charging current to ensure the safe charging of the battery.

[0033] The primary function of the vehicle's earth (PE) ground wire is to protect personal safety. During electric vehicle charging, high-voltage operations are involved, and any equipment or operational malfunction can lead to current leakage. By directly connecting the charging device to the earth, the ground wire guides leaked current safely to the ground, reducing the risk of electric shock. Furthermore, the strong electromagnetic field generated during electric vehicle charging is guided to the earth by the ground wire, reducing electromagnetic radiation, protecting the stable operation of surrounding equipment, and shielding it from electromagnetic interference. In cases of excessive current, it also provides overcurrent protection; when the current exceeds the charging station's rated value, the ground wire guides the excess current to the ground, protecting the charging station and vehicle from damage.

[0034] The DC charging port of the charging pile is connected to the low-voltage connector 3 on the vehicle through the charging communication branch 13, which enables communication between the on-board charger and the battery management system (BMS) to transmit data such as charging status and battery information, ensuring the safety and efficiency of the charging process.

[0035] like Figure 2 As shown, the charging connection confirmation branch 14 consists of, from top to bottom, a first charging connection confirmation branch 141 and a second charging connection branch 142. The first charging connection confirmation branch 141 detects the connection status between the charging gun and the vehicle's charging port. By detecting the voltage of the first charging connection confirmation branch 141, it can be determined whether the charger is properly plugged in and fully connected. The second charging connection branch 142 is also used to confirm the integrity of the charging connection, working in conjunction with the first charging connection branch 141 to ensure a safe and reliable connection between the charging interface and the charging equipment. Based on the confirmation signals from the first charging connection confirmation branch 141 and the second charging connection branch 142, the control device in the vehicle decides whether to start the charging process, monitoring the connection status in real time during charging to ensure the normal operation of the charging process. If an abnormal connection is detected, the off-board charging equipment will immediately shut off the DC power output and disconnect the power switch upon completion, thereby avoiding safety accidents caused by connection problems.

[0036] During the charging process, if the off-board charging device does not receive a charging level request message from the battery management system periodically sent through the second charging connection branch 134 within 100ms, it will also respond by shutting down the DC power output to ensure the safety of the charging process.

[0037] The low-voltage auxiliary branch 15 consists of the low-voltage auxiliary power positive branch and the low-voltage auxiliary power negative branch from top to bottom. Before charging the car, the charging pile is connected to the low-voltage connector 3 on the car through the low-voltage auxiliary power positive branch (A+) and negative branch (A-) to provide 12V auxiliary voltage to the vehicle control unit (VCU) of the vehicle, wake up the vehicle control unit of the vehicle, and inform the vehicle to prepare for charging.

[0038] Both the aforementioned charging connection confirmation branch 14 and low-voltage auxiliary branch 15 communicate with the vehicle via the low-voltage connector 3 on the vehicle.

[0039] In this embodiment, by setting an inductor on the charging communication branch on the circuit board, electromagnetic interference and signal noise are shielded, making the charging communication signal more stable and improving charging safety. Since only an inductor is set, the circuit structure is simpler and the cost is reduced, making it applicable to charging systems for various electric vehicles.

[0040] In one embodiment, such as Figure 2 As shown, the charging communication branch 13 includes: a first charging communication branch 132, a first inductor 1011 provided on the first charging communication branch 131, the input end of the first charging communication branch 131 being connected to the first charging communication port of the charging pile, the output end of the first charging communication branch 131 being connected to one end of the first inductor 1011, and the other end of the first inductor 1011 being used to output a first charging communication signal.

[0041] The first charging communication branch 131 serves as the positive terminal for charging communication, responsible for transmitting control signals and data information during the charging process, such as battery voltage and current requirements. The first inductor 1011 is connected to the output terminal of the first charging communication branch 131, i.e., near the end of the first charging communication branch 131.

[0042] In this embodiment, the charging communication branch includes a first charging communication branch, which transmits control signals and data information during the charging process, such as battery voltage and current requirements, to ensure that the charging pile can provide appropriate charging current and voltage according to the vehicle's needs, ensuring the safety and efficiency of the charging process. A first inductor is set at the output end of the first charging communication branch to filter out high-frequency noise from the first charging communication branch, reducing interference to other electronic devices, while smoothing signal transmission, reducing signal reflection and distortion, ensuring stable transmission of communication signals, and enhancing charging safety.

[0043] In one embodiment, such as Figure 2As shown, the charging communication branch 13 further includes: a second charging communication branch 132, on which a second inductor 1012 is provided, the input end of the second charging communication branch 132 is connected to the second charging communication port of the charging pile, the output end of the second charging communication branch 132 is connected to one end of the second inductor 1012, and the other end of the second inductor 1012 is used to output a second charging communication signal.

[0044] The second charging communication branch 132 serves as the negative terminal of the charging communication line. Together with the first charging communication branch 131, it forms a complete communication circuit, providing a loop for signal transmission. It is responsible for receiving instructions sent by the charging pile and feeding back the vehicle's status information to the charging pile so that the charging pile can adjust the charging parameters in real time. The second inductor 1012 is connected to the output terminal of the second charging communication branch 132, that is, near the end of the second charging communication branch 132.

[0045] The first charging communication branch 131 and the second charging communication branch 132 are used for communication between the vehicle battery management system (BMS) and the DC charging pile. During the charging process, the vehicle battery management system (BMS) sends battery charging demand parameters, such as the required voltage and current range, to the charging pile in real time through the first charging communication branch 131 and the second charging communication branch 132. The charging pile adjusts its output voltage and current according to these parameters. The first charging communication branch 131 and the second charging communication branch 132 are also used to transmit status information of the charging pile and the vehicle, helping both parties to understand the charging status in real time and promptly identify and handle potential problems.

[0046] In this embodiment, the charging communication branch also includes a second charging communication branch, which receives instructions sent by the charging pile and feeds back the vehicle's status information to the charging pile to ensure the safety of the charging process. A second inductor is set at the output end of the second charging communication branch to filter out high-frequency noise, reduce interference to other electronic devices, smooth signal transmission, reduce signal reflection and distortion, ensure stable transmission of communication signals, and enhance charging safety.

[0047] In one embodiment, the inductance values ​​of both the first inductor and the second inductor are in the range of 1-100. All of them use ferrite or nanocrystalline materials as magnetic cores.

[0048] Both the first and second inductors use ferrite or nanocrystalline materials as their magnetic cores, such as... Figure 3As shown, all are surface mount devices (SMD) for easy mounting on the circuit board. The models of the first and second inductors are: AMPSM201612BER22M21-LF, AMPSM201612BER47M21-LF, AMPSM201612BE1R5M21-LF, and AMPSM201612BE3R3M21-LF. You can choose the appropriate model as needed.

[0049] In this embodiment, ferrite or nanocrystalline materials are used as the magnetic core, which can concentrate the magnetic field, reduce electromagnetic interference, and the process is simple, thus reducing costs. The inductance values ​​used are all in the range of 1-100. The inductor improves accuracy while ensuring stability, and its small size makes it easier to integrate into the circuit board. It can withstand larger currents and has high reliability.

[0050] In one embodiment, preferably, the first charging communication branch 131 further includes a first capacitor, which is connected in parallel with the first inductor 1011 to form a first filter circuit. The second charging communication branch 132 further includes a second capacitor, which is connected in parallel with the second inductor 1011 to form a second filter circuit.

[0051] The first capacitor and the second capacitor are model numbers CC0805KRX7R9BB104 and CC1812KKX5R7BB226, respectively. Appropriate capacitors can be selected as needed.

[0052] In this embodiment, capacitors are connected in parallel at the first inductor and the second inductor to form an LC filter circuit, which filters out high-frequency noise in the first charging communication branch 131 and the second charging communication branch 132, making the transmitted signal more accurate and reliable, protecting sensitive back-end components, improving the service life of the equipment, and reducing costs.

[0053] In one embodiment, such as Figure 2 As shown, the circuit board 1 is also provided with a temperature sensor power supply branch 17, the input terminal of the temperature sensor power supply branch 17 is used to receive temperature signals, and the output terminal of the temperature sensor power supply branch 17 is used to output the temperature signals.

[0054] Among them, such as Figure 2 As shown, the temperature sensor power supply branch 17 also includes a temperature sensor ground wire 173. The input terminal of the temperature sensor ground wire 173 is connected to the vehicle body ground wire of the DC power supply branch 11, and the output terminal of the temperature sensor ground wire 173 is connected to the low-voltage connector 3 of the vehicle.

[0055] In this embodiment, the temperature sensor power supply branch 17 transmits the temperature signal to the vehicle management system. When the temperature signal exceeds the threshold, the vehicle management system issues an early warning to remind the user or the system to take corresponding measures, or adjust the charging power and charging current according to the actual situation to improve charging efficiency. The temperature sensor ground wire is connected to the vehicle body ground wire to ensure safety during the charging process.

[0056] In one embodiment, such as Figure 2 As shown, the temperature sensor power supply branch 17 includes: a first temperature sensor power supply branch 171, on which a first temperature sensor 102 is disposed, the first temperature sensor 102 is used to acquire the first temperature signal of the DC power supply branch 11, the input terminal of the first temperature sensor power supply branch 121 is connected to the output terminal of the first temperature sensor 102, and is used to receive the first temperature signal output by the first temperature sensor 102, and the output terminal of the first temperature sensor power supply branch 171 is used to output the first temperature signal.

[0057] The first temperature sensor 102 collects the temperature of the wire in the DC power positive branch (DC+) of the DC power branch 11 and transmits it to the first temperature sensor power branch 171. The first temperature sensor power branch 171 transmits the first temperature signal to the low-voltage connector 3 of the vehicle.

[0058] In this embodiment, the temperature of the wires in the positive branch of the DC power supply is collected by the first temperature sensor, and the collected first temperature signal is transmitted to the vehicle's charging system through the power supply branch of the first temperature sensor. The charging power and current are adjusted according to the real-time situation to optimize charging efficiency and improve battery life.

[0059] In one embodiment, such as Figure 2 As shown, the temperature sensor power supply branch 17 further includes: a second temperature sensor power supply branch 172, on which a second temperature sensor 103 is disposed. The second temperature sensor 103 is used to acquire the second temperature signal of the DC power supply branch 11. The input terminal of the second temperature sensor power supply branch 172 is connected to the output terminal of the second temperature sensor 103 for receiving the second temperature signal output by the second temperature sensor 103. The output terminal of the second temperature sensor power supply branch 172 is used to output the second temperature signal.

[0060] The second temperature sensor 103 monitors the temperature of the wires in the negative branch of the DC power supply in real time, and transmits the collected second temperature signal to the low-voltage connector 3 of the vehicle through the second temperature sensor power supply branch 172, and then to the vehicle management system to adjust the charging power and current according to the real-time situation.

[0061] In this embodiment, the temperature of the wire in the negative branch of the DC power supply is collected by a second temperature sensor, and the collected second temperature signal is transmitted to the vehicle's charging system through the power supply branch of the second temperature sensor. The charging power and current are adjusted according to the real-time situation to optimize charging efficiency and improve battery life. It can also take protective measures when the temperature exceeds the safe range to avoid damage to the charging gun and battery and extend the service life of the equipment.

[0062] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A charging port circuit for an automotive charging connector, characterized in that, The device includes a circuit board on which are configured a DC power supply branch, a charging communication branch, a charging connection confirmation branch, and a low-voltage auxiliary power supply branch. The input terminal of the DC power supply branch is used to connect to the DC power interface of the charging pile, and the output terminal of the DC power supply branch is used to output a DC power supply signal. The input terminal of the charging communication branch is used to connect to the charging communication port of the charging pile, and the output terminal of the charging communication branch is used to output a charging communication signal. The input terminal of the charging connection confirmation branch is used to connect to the charging connection confirmation port of the charging pile, and the output terminal of the charging connection confirmation branch is used to output a charging connection confirmation signal. The input terminal of the low-voltage auxiliary power supply branch is used to connect to the low-voltage auxiliary power supply terminal of the charging pile, and the output terminal of the low-voltage auxiliary power supply branch is used to output a low-voltage auxiliary power supply signal. An inductor is provided on the charging communication branch to shield against electromagnetic interference and signal noise.

2. The charging port circuit according to claim 1, characterized in that, The charging communication branch includes: a first charging communication branch, a first inductor provided on the first charging communication branch, an input terminal of the first charging communication branch connected to the first charging communication port of the charging pile, an output terminal of the first charging communication branch connected to one end of the first inductor, and the other end of the first inductor used to output a first charging communication signal.

3. The charging port circuit according to claim 2, characterized in that, The charging communication branch further includes: a second charging communication branch, which is provided with a second inductor. The input end of the second charging communication branch is connected to the second charging communication port of the charging pile, and the output end of the second charging communication branch is connected to one end of the second inductor. The other end of the second inductor is used to output a second charging communication signal.

4. The charging port circuit according to claim 3, characterized in that, The inductance values ​​of both the first and second inductors range from 1 to 100. .

5. The charging port circuit according to claim 4, characterized in that, The first inductor and the second inductor use ferrite or nanocrystalline materials as magnetic cores.

6. The charging port circuit according to claim 5, characterized in that, The first charging communication branch also includes a first capacitor, which is connected in parallel with the first inductor to form a first filter circuit.

7. The charging port circuit according to claim 6, characterized in that, The second charging communication branch also includes a second capacitor, which is connected in parallel with the second inductor to form a second filter circuit.

8. The charging port circuit according to claim 1, characterized in that, The circuit board also includes a temperature sensor power supply branch, the input of which is used to receive temperature signals, and the output of which is used to output the temperature signals.

9. The charging port circuit according to claim 8, characterized in that, The temperature sensor power supply branch includes: a first temperature sensor power supply branch, on which a first temperature sensor is provided, the first temperature sensor is used to acquire a first temperature signal from the DC power supply branch, the input terminal of the first temperature sensor power supply branch is connected to the output terminal of the first temperature sensor, and is used to receive the first temperature signal output by the first temperature sensor, and the output terminal of the first temperature sensor power supply branch is used to output the first temperature signal.

10. The charging port circuit according to claim 9, characterized in that, The temperature sensor power supply branch further includes: a second temperature sensor power supply branch, on which a second temperature sensor is provided. The second temperature sensor is used to acquire the second temperature signal of the DC power supply branch. The input terminal of the second temperature sensor power supply branch is connected to the output terminal of the second temperature sensor to receive the second temperature signal output by the second temperature sensor. The output terminal of the second temperature sensor power supply branch is used to output the second temperature signal.

Images