Vehicle-mounted central security gateway circuit and system

Abstract

The utility model provides a vehicle-mounted central security gateway circuit and system, and relates to the technical field of vehicle-mounted gateways. The vehicle-mounted central security gateway circuit comprises an anti-impact module, a first-stage filtering module, a second-stage filtering module, a third-stage filtering module and a control module which are electrically connected in sequence, the anti-impact module and the first-stage filtering module are used for being connected with a power supply; wherein the first-stage filtering module, the second-stage filtering module and the third-stage filtering module are used for jointly inhibiting common-mode interference and differential-mode interference; the anti-impact module is used for suppressing transient impact interference. The vehicle-mounted central security gateway circuit and system provided by the utility model have the advantages that transient impact can be absorbed, and the interference suppression effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle gateway, in particular to a vehicle central security gateway circuit and system. BACKGROUND

[0002] With the popularization of intelligent vehicles, the vehicle central security gateway plays a core role in intelligent networked vehicles. The vehicle central security gateway interacts with multiple communication networks inside and outside the vehicle to achieve data routing, processing and security protection.

[0003] For such a key electronic component as the central gateway, electromagnetic compatibility is particularly important. As the core of vehicle communication, the central gateway needs to ensure that it can effectively process information from other electronic systems while not being affected by external electromagnetic interference.

[0004] Although some existing electromagnetic compatibility technologies have alleviated the problem of electromagnetic interference to some extent, under the influence of high-frequency radio waves and various electronic devices in the current complex vehicle electrical system environment, the power supply part of the vehicle central security gateway is still susceptible to electromagnetic interference.

[0005] In summary, the existing technology has the problem that the power supply part of the vehicle central security gateway is susceptible to electromagnetic interference. SUMMARY

[0006] The purpose of the present application is to provide a vehicle central security gateway circuit and system to solve the problem that the power supply part of the vehicle central security gateway is susceptible to electromagnetic interference in the prior art.

[0007] In order to achieve the above-mentioned purpose, the technical solutions adopted by the embodiments of the present application are as follows:

[0008] In a first aspect, the present application provides a vehicle central security gateway circuit, which comprises an anti-impact module, a first-stage filter module, a second-stage filter module, a third-stage filter module and a control module. The anti-impact module, the first-stage filter module, the second-stage filter module, the third-stage filter module and the control module are electrically connected in sequence, and the anti-impact module and the first-stage filter module are used to connect the power supply. Wherein,

[0009] The first-stage filter module, the second-stage filter module and the third-stage filter module are used to jointly suppress common-mode interference and differential-mode interference.

[0010] The anti-impact module is used to suppress transient impact interference.

[0011] Optionally, the anti-shock module comprises a transient diode, a cathode of the transient diode is electrically connected to the positive pole of the power supply, and an anode of the transient diode is electrically connected to the negative pole of the power supply.

[0012] Optionally, the first-stage filter module comprises a first differential-mode thin-film capacitor and a first common-mode inductor, two ends of the first differential-mode thin-film capacitor are respectively connected to the positive pole and the negative pole of the power supply, the first common-mode inductor comprises a first winding and a second winding which are wound on the same magnetic ring, have opposite phases and have the same number of turns, one end of the first winding is electrically connected to the positive pole of the power supply, one end of the second winding is electrically connected to the negative pole of the power supply, and the second ends of the first winding and the second winding are electrically connected to the second-stage filter module.

[0013] Optionally, the first-stage filter module further comprises a first bleeder resistor, and the first bleeder resistor is connected in parallel with the first differential-mode thin-film capacitor.

[0014] Optionally, the second-stage filter module comprises a second differential-mode thin-film capacitor, a first common-mode ceramic capacitor, a second common-mode ceramic capacitor and a second common-mode inductor, the first-stage filter module is electrically connected to the positive pole lead and the negative pole lead of the power supply, two ends of the second differential-mode thin-film capacitor are respectively electrically connected to the positive pole lead and the negative pole lead, one end of the first common-mode ceramic capacitor is electrically connected to the positive pole lead, one end of the second common-mode ceramic capacitor is electrically connected to the negative pole lead, and the other ends of the first common-mode ceramic capacitor and the second common-mode ceramic capacitor are grounded, and the second common-mode inductor comprises a third winding and a fourth winding which are wound on the same magnetic ring, have opposite phases and have the same number of turns, one end of the third winding is electrically connected to the positive pole lead, one end of the fourth winding is electrically connected to the negative pole lead, and the second ends of the third winding and the fourth winding are electrically connected to the third-stage filter module.

[0015] Optionally, the first common-mode ceramic capacitor and the second common-mode ceramic capacitor are Y capacitors with the same capacitance value.

[0016] Optionally, the third-stage filter module comprises a third differential-mode thin-film capacitor, a third common-mode ceramic capacitor and a fourth common-mode ceramic capacitor, the second-stage filter module is electrically connected to the positive pole lead and the negative pole lead of the power supply, the positive pole lead and the negative pole lead are electrically connected to the control module, one end of the third common-mode ceramic capacitor is electrically connected to the positive pole lead, one end of the fourth common-mode ceramic capacitor is electrically connected to the negative pole lead, and the other ends of the third common-mode ceramic capacitor and the fourth common-mode ceramic capacitor are grounded.

[0017] Optionally, the third-stage filter module further comprises a second bleeder resistor, and the second bleeder resistor is connected in parallel with the third differential-mode thin-film capacitor.

[0018] Optionally, the third common-mode ceramic capacitor and the fourth common-mode ceramic capacitor are Y capacitors with equal capacitance.

[0019] In another aspect, the embodiments of the present application also provide a vehicle-mounted central security gateway system, which comprises the vehicle-mounted central security gateway circuit described above, and the output end of the power supply is electrically connected with the vehicle-mounted central security gateway circuit.

[0020] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0021] The present application provides a vehicle-mounted central security gateway circuit and system, which comprises an anti-impact module, a first-stage filter module, a second-stage filter module, a third-stage filter module, and a control module. The anti-impact module, the first-stage filter module, the second-stage filter module, the third-stage filter module, and the control module are electrically connected in sequence, and the anti-impact module and the first-stage filter module are used to connect a power supply. The first-stage filter module, the second-stage filter module, and the third-stage filter module are used to jointly suppress common-mode interference and differential-mode interference. The anti-impact module is used to suppress transient impact interference. Since the vehicle-mounted central security gateway circuit provided by the present application comprises an anti-impact module and a three-stage filter module, when the vehicle-mounted central security gateway circuit is subjected to transient impact, the anti-impact module can absorb the impact, and when it is subjected to common-mode interference or differential-mode interference, the three-stage filter module can suppress the interference, thereby improving the interference suppression effect and enabling the vehicle-mounted central security gateway to stably operate under different working conditions.

[0022] In order to make the above objectives, features and advantages of the present application more apparent, the following will specifically describe a preferred embodiment in conjunction with the accompanying drawings, and make a detailed description as follows. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without paying any creative labor on the basis of these drawings.

[0024] Figure 1 A module schematic diagram of the vehicle-mounted central security gateway circuit provided by the embodiments of the present application.

[0025] Figure 2 A circuit schematic diagram of the vehicle-mounted central security gateway circuit provided by the embodiments of the present application.

[0026] Figure 3Another circuit schematic of the vehicle-mounted central security gateway circuit provided by the embodiment of the present application is shown in the figure.

[0027] In the figure:

[0028] 100 - vehicle-mounted central security gateway circuit; 110 - impact resistance module; 120 - first-stage filter module; 130 - second-stage filter module; 140 - third-stage filter module; 150 - control module; TV1 - transient diode; CS1 - first differential-mode film capacitor; CS2 - second differential-mode film capacitor; CS3 - third differential-mode film capacitor; LS1 - first common-mode inductor; LS2 - second common-mode inductor; CK1 - first common-mode ceramic capacitor; CK2 - second common-mode ceramic capacitor; CK3 - second common-mode ceramic capacitor; CK4 - second common-mode ceramic capacitor; R1 - first bleeder resistor; R2 - second bleeder resistor. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts are within the scope of protection of the present application.

[0031] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] Some embodiments of the present application will be described in detail below in combination with the drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0034] As described in the background, the current vehicle-mounted central security gateway needs to run in a complex vehicle electrical system environment, so the power supply part of the vehicle-mounted central security gateway is easily affected by electromagnetic interference.

[0035] Therefore, in order to inhibit the electromagnetic interference of the vehicle-mounted central security gateway during operation, the application provides a vehicle-mounted central security gateway circuit, which improves the stability of the vehicle-mounted central security gateway during operation by setting an anti-impact module and a three-stage filter module.

[0036] The vehicle-mounted central security gateway circuit provided by the application is exemplarily described below:

[0037] As an implementation manner, please refer to Figure 1 The vehicle-mounted central security gateway circuit 100 provided by the embodiment of the application includes an anti-impact module 110, a first-stage filter module 120, a second-stage filter module 130, a third-stage filter module 140, and a control module 150. The anti-impact module 110, the first-stage filter module 120, the second-stage filter module 130, the third-stage filter module 140, and the control module 150 are electrically connected in sequence, and the anti-impact module 110 and the first-stage filter module 120 are used to connect the power supply. The first-stage filter module 120, the second-stage filter module 130, and the third-stage filter module 140 are used to jointly inhibit common-mode interference and differential-mode interference. The anti-impact module 110 is used to inhibit transient impact interference.

[0038] It can be understood that by setting the anti-impact module 110, when the power supply circuit of the vehicle-mounted central security gateway is subjected to a large-current transient impact, the anti-impact module 110 can absorb it. At the same time, when common-mode interference current and differential-mode interference current occur, the three-stage filter module can also be used to inhibit them.

[0039] It should be noted that the power supply supplies power to the controller through the positive lead and the negative lead, and the anti-impact module 110, the first-stage filter module 120, the second-stage filter module 130, and the third-stage filter module 140 are connected to the positive lead and the negative lead. In addition, the positive lead and the negative lead provided by the application can be copper silver-plated leads.

[0040] In an implementation manner, please refer to Figure 2 The anti-impact module 110 includes a transient diode TV1 (TVS), the cathode of the transient diode TV1 is electrically connected to the positive electrode of the power supply, and the anode of the transient diode TV1 is electrically connected to the negative electrode of the power supply. When a transient large-current impact occurs in the circuit, the transient diode TV1 will inhibit the excessive voltage exceeding its breakdown voltage. When the overvoltage disappears, the diode will automatically return.

[0041] The first-stage filter module 120 includes a first differential-mode film capacitor CS1 and a first common-mode inductor LS1. The first differential-mode film capacitor CS1 is connected to the positive and negative poles of the power supply. The first common-mode inductor LS1 includes a first winding and a second winding that are wound on the same magnetic ring, have opposite winding directions, and have the same number of turns. One end of the first winding is electrically connected to the positive pole of the power supply, and one end of the second winding is electrically connected to the negative pole of the power supply. The second ends of the first winding and the second winding are electrically connected to the second-stage filter module 130.

[0042] The first differential-mode film capacitor CS1 can suppress differential-mode interference signals. The first common-mode inductor LS1 can suppress common-mode interference signals.

[0043] In addition, the first-stage filter module 120 further includes a first bleeder resistor R1 that is connected in parallel with the first differential-mode film capacitor CS1. The first bleeder resistor R1 is used to discharge high voltage and improve the discharge function of the entire circuit.

[0044] The second-stage filter module 130 includes a second differential-mode film capacitor CS2, a first common-mode ceramic capacitor CK1, a second common-mode ceramic capacitor CK2, and a second common-mode inductor LS2. The first-stage filter module 120 is electrically connected to the positive and negative leads of the power supply. The second differential-mode film capacitor CS2 is connected to the positive and negative leads. One end of the first common-mode ceramic capacitor CK1 is electrically connected to the positive lead, and one end of the second common-mode ceramic capacitor CK2 is electrically connected to the negative lead. The other ends of the first common-mode ceramic capacitor CK1 and the second common-mode ceramic capacitor CK2 are grounded. The second common-mode inductor LS2 includes a third winding and a fourth winding that are wound on the same magnetic ring, have opposite winding directions, and have the same number of turns. One end of the third winding is electrically connected to the positive lead, and one end of the fourth winding is electrically connected to the negative lead. The second ends of the third winding and the fourth winding are electrically connected to the third-stage filter module 140.

[0045] The second differential-mode film capacitor CS2 is used to suppress differential-mode interference signals. The first common-mode ceramic capacitor CK1, the second common-mode ceramic capacitor CK2, and the second common-mode inductor LS2 are used to suppress common-mode interference signals.

[0046] The first differential-mode film capacitor CS1, the first common-mode inductor LS1, and the second differential-mode film capacitor CS2 form a pi-type filter circuit, which improves the interference suppression effect.

[0047] As an implementation manner, the first differential-mode film capacitor CS1 and the second differential-mode film capacitor CS2 are X capacitors, and the first common-mode ceramic capacitor CK1 and the second common-mode ceramic capacitor CK2 are Y capacitors with the same capacitance.

[0048] As an implementation manner, the third-stage filtering module 140 includes a third differential-mode thin-film capacitor CS3, a third common-mode ceramic capacitor CK3, and a fourth common-mode ceramic capacitor CK4, the second-stage filtering module 130 is electrically connected with positive and negative conductive lines of a power supply, the positive and negative conductive lines are electrically connected with a control module 150, one end of the third common-mode ceramic capacitor CK3 is electrically connected with the positive conductive line, one end of the fourth common-mode ceramic capacitor CK4 is electrically connected with the negative conductive line, and the other ends of the third common-mode ceramic capacitor CK3 and the fourth common-mode ceramic capacitor CK4 are grounded.

[0049] Similarly, the third differential-mode thin-film capacitor CS3 is used to suppress differential-mode interference, and the third common-mode ceramic capacitor CK3 and the fourth common-mode ceramic capacitor CK4 are used to suppress common-mode interference.

[0050] In addition, the third-stage filtering module 140 further includes a second bleed resistor R2, and the second bleed resistor R2 is connected in parallel with the third differential-mode thin-film capacitor CS3. The second bleed resistor R2 can further improve the impulse bleed effect of the circuit.

[0051] Of course, the third differential-mode thin-film capacitor CS3 can also be an X capacitor, and the third common-mode ceramic capacitor CK3 and the fourth common-mode ceramic capacitor CK4 are Y capacitors with equal capacitance values.

[0052] In actual work, when a transient impulse current occurs, it is absorbed by the impulse module.

[0053] When there is a common-mode interference current, after impedance attenuation by the first common-mode inductor LS1, part of the common-mode interference current is introduced into the ground line through the first common-mode ceramic capacitor CK1 and the second common-mode ceramic capacitor CK2, and another part of the common-mode interference current is introduced into the ground line through the third common-mode ceramic capacitor CK3 and the fourth common-mode ceramic capacitor CK4 after impedance attenuation by the second common-mode inductor LS2 again, thereby realizing suppression of common-mode interference.

[0054] When there is a differential-mode interference current, after impedance attenuation by the first bleed resistor R1 and the first differential-mode thin-film capacitor CS1, part of the differential-mode interference current is introduced into the negative electrode, and another part of the differential-mode interference current is introduced into the negative electrode through the first differential-mode thin-film capacitor CS1 after impedance attenuation by the first common-mode inductor LS1, and finally introduced into the negative electrode through the third differential-mode thin-film capacitor CS3 after impedance attenuation by the second common-mode inductor LS2 again, thereby realizing suppression of differential-mode interference.

[0055] Based on the above implementation manner, the embodiment of the application further provides a vehicle-mounted central security gateway system, which includes a power supply and the vehicle-mounted central security gateway circuit 100 described above, and an output end of the power supply is electrically connected with the vehicle-mounted central security gateway circuit 100.

[0056] In summary, the application provides a vehicle-mounted central security gateway circuit and system, the vehicle-mounted central security gateway circuit comprising an anti-impact module, a first-stage filtering module, a second-stage filtering module, a third-stage filtering module, and a control module, the anti-impact module, the first-stage filtering module, the second-stage filtering module, the third-stage filtering module, and the control module being electrically connected in sequence, and the anti-impact module and the first-stage filtering module being used to connect a power supply; wherein the first-stage filtering module, the second-stage filtering module, and the third-stage filtering module are used to jointly suppress common-mode interference and differential-mode interference; and the anti-impact module is used to suppress transient impact interference. Since the vehicle-mounted central security gateway circuit provided by the application comprises an anti-impact module and three-stage filtering modules, when the vehicle-mounted central security gateway circuit is subjected to transient impact, the anti-impact module can be used to absorb the impact, and when subjected to common-mode interference or differential-mode interference, the three-stage filtering modules can be used to suppress the interference, thereby improving the interference suppression effect and enabling the vehicle-mounted central security gateway to stably operate under different working conditions. The above merely describes preferred embodiments of the application and is not intended to limit the application, and those skilled in the art can make various modifications and changes to the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

[0057] It should be apparent to those skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the application. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims shall be construed as limiting the claims being involved.

Claims

1. An in-vehicle central security gateway circuit, characterized by, The vehicle-mounted central security gateway circuit comprises an anti-impact module, a first-stage filter module, a second-stage filter module, a third-stage filter module and a control module, the anti-impact module, the first-stage filter module, the second-stage filter module, the third-stage filter module and the control module are electrically connected in sequence, and the anti-impact module and the first-stage filter module are used for connecting a power supply. The first-stage filter module, the second-stage filter module and the third-stage filter module are used for jointly suppressing common-mode interference and differential-mode interference. The anti-impact module is used for suppressing transient impact interference.

2. The vehicle-mounted central security gateway circuit of claim 1, wherein, The anti-impact module comprises a transient diode, a cathode of the transient diode is electrically connected to a positive electrode of the power supply, and an anode of the transient diode is electrically connected to a negative electrode of the power supply.

3. The vehicle-mounted central security gateway circuit of claim 1, wherein, The first-stage filter module comprises a first differential-mode thin-film capacitor and a first common-mode inductor, two ends of the first differential-mode thin-film capacitor are respectively connected to the positive electrode and the negative electrode of the power supply, the first common-mode inductor comprises a first winding and a second winding which are opposite in winding direction and have the same number of turns on the same magnetic ring, one end of the first winding is electrically connected to the positive electrode of the power supply, one end of the second winding is electrically connected to the negative electrode of the power supply, and the second ends of the first winding and the second winding are electrically connected to the second-stage filter module.

4. The vehicle-mounted central security gateway circuit of claim 3, wherein, The first-stage filter module further comprises a first bleeder resistor which is connected in parallel with the first differential-mode thin-film capacitor.

5. The vehicle-mounted central security gateway circuit of claim 1, wherein, The second-stage filter module comprises a second differential-mode thin-film capacitor, a first common-mode ceramic capacitor, a second common-mode ceramic capacitor and a second common-mode inductor, the first-stage filter module is electrically connected to positive and negative electrode leads of the power supply, two ends of the second differential-mode thin-film capacitor are respectively electrically connected to the positive electrode lead and the negative electrode lead, one end of the first common-mode ceramic capacitor is electrically connected to the positive electrode lead, one end of the second common-mode ceramic capacitor is electrically connected to the negative electrode lead, and the other ends of the first common-mode ceramic capacitor and the second common-mode ceramic capacitor are grounded, the second common-mode inductor comprises a third winding and a fourth winding which are opposite in winding direction and have the same number of turns on the same magnetic ring, one end of the third winding is electrically connected to the positive electrode lead, one end of the fourth winding is electrically connected to the negative electrode lead, and the second ends of the third winding and the fourth winding are electrically connected to the third-stage filter module.

6. The vehicle-mounted central security gateway circuit of claim 5, wherein, The first common-mode ceramic capacitor and the second common-mode ceramic capacitor are Y capacitors with the same capacitance value.

7. The vehicle-mounted central security gateway circuit of claim 1, wherein, The third-stage filter module comprises a third differential-mode thin-film capacitor, a third common-mode ceramic capacitor and a fourth common-mode ceramic capacitor, the second-stage filter module is electrically connected to the positive and negative electrode leads of the power supply, the positive and negative electrode leads are electrically connected to the control module, one end of the third common-mode ceramic capacitor is electrically connected to the positive electrode lead, one end of the fourth common-mode ceramic capacitor is electrically connected to the negative electrode lead, and the other ends of the third common-mode ceramic capacitor and the fourth common-mode ceramic capacitor are grounded.

8. The vehicle-mounted central security gateway circuit of claim 7, wherein, The third-stage filter module further comprises a second bleeder resistor which is connected in parallel with the third differential-mode thin-film capacitor.

9. The vehicle-mounted central security gateway circuit of claim 7, wherein, The third common-mode ceramic capacitor and the fourth common-mode ceramic capacitor are Y capacitors with equal capacitance values.

10. An in-vehicle central security gateway system, characterized by, The vehicle-mounted central security gateway system comprises a power supply and the vehicle-mounted central security gateway circuit according to any one of claims 1 to 9, and an output end of the power supply is electrically connected with the vehicle-mounted central security gateway circuit.

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