Multi-domain power supply system, domain controller and vehicle

Abstract

The utility model discloses a multi-domain power supply system, a domain controller and a vehicle, and the system comprises a power conversion module which is electrically connected with an external input voltage and is used for converting the input voltage into a circuit power supply; the security domain protection module is electrically connected to the power supply conversion module and is used for performing isolation protection on the security domain control chip; the entertainment domain protection module is electrically connected to the power supply conversion module and is used for carrying out isolation protection on an entertainment domain load; wherein the security domain protection module and the entertainment domain protection module are connected in parallel to the output end of the power supply conversion module. According to the utility model, the isolation between the safety domain and the entertainment domain of the automobile can be realized, the application cost is reduced, and the reliability of the power supply system is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile electronic technology especially relates to a multi-domain power supply system, equipment and vehicle. BACKGROUND

[0002] In the prior art, when supplying power to the safety domain and the entertainment domain, the circuit power supply is usually divided into two independent power supply domains, and each power supply domain needs an independent power chip for power supply. Although this design can ensure the independence and safety of each power supply domain, it also brings high cost and complexity. SUMMARY

[0003] To solve the above technical problems, the utility model provides a multi-domain power supply system, which can realize the isolation of the automobile safety domain and the entertainment domain, reduce the application cost, and ensure the power supply reliability.

[0004] In a first aspect, the utility model provides a multi-domain power supply system, which comprises:

[0005] A power conversion module is electrically connected to an external input voltage and is used for converting the input voltage into a circuit power supply.

[0006] A safety domain protection module is electrically connected to the power conversion module and is used for isolating and protecting the safety domain control chip.

[0007] An entertainment domain protection module is electrically connected to the power conversion module and is used for isolating and protecting the entertainment domain load.

[0008] The safety domain protection module and the entertainment domain protection module are connected in parallel to the output end of the power conversion module.

[0009] In a possible implementation manner, the entertainment domain protection module comprises a first entertainment domain protection unit and a second entertainment domain protection unit.

[0010] The first entertainment domain protection unit is electrically connected to the power conversion module and is used for isolating and protecting the first entertainment domain load.

[0011] The second entertainment domain protection unit is electrically connected to the power conversion module and is used for isolating and protecting the second entertainment domain load.

[0012] The first entertainment domain protection unit and the second entertainment domain protection unit are connected in parallel to the output end of the power conversion module.

[0013] In a possible implementation manner, a load resistor for voltage division and current limiting is arranged between the entertainment domain protection module and the entertainment domain load.

[0014] In a possible implementation, a decoupling filter module for suppressing voltage fluctuation and filtering high-frequency noise is further arranged between the power conversion module and the safety domain protection module and / or the entertainment domain protection module.

[0015] In a possible implementation, the decoupling filter module comprises an inductor and a capacitor, the inductor is connected in series with the output terminal of the power conversion module, and the capacitor is connected in parallel with the output terminal of the power conversion module.

[0016] In a possible implementation, the power conversion module comprises a power management chip and a synchronous rectification circuit.

[0017] The power management chip realizes the conversion of the input voltage by controlling the switching state of the synchronous rectification circuit.

[0018] In a possible implementation, the synchronous rectification circuit comprises a first MOSFET and a second MOSFET, and the first MOSFET and the second MOSFET are alternately turned on under the control of the power management chip.

[0019] In a possible implementation, the safety domain control chip is an S32G chip, and the voltage of the circuit power supply is 3.3V.

[0020] The second aspect of the utility model provides a domain controller, the domain controller includes the multi-domain power supply system of any one of the above first aspect.

[0021] The third aspect of the utility model provides a vehicle, the vehicle is equipped with the domain controller of the above second aspect.

[0022] The utility model discloses a safety domain protection module and entertainment domain protection module are connected in parallel in the output terminal of power conversion module, realizes the isolation protection of multiple independent function domains under single power supply. The design not only reduces the hardware complexity and cost, but also can ensure that the safety domain and the entertainment domain are isolated from each other when failure occurs, improves the safety and stability of system. Meanwhile, the power conversion module unifies the management of input voltage, improves the power supply efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Prior art circuit diagram for multi-domain power supply system.

[0024] Figure 2 Structure schematic view of one embodiment of the utility model multi-domain power supply system.

[0025] Figure 3 Structure schematic view of another embodiment of the utility model multi-domain power supply system.

[0026] Figure 4 Circuit diagram of an embodiment of the multi-domain power supply system.

[0027] BRIEF DESCRIPTION OF DRAWINGS: 1, power conversion module; 2, safety domain protection module; 3, entertainment domain protection module; 4, decoupling filter module. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] It should be understood that the terms "first", "second" and "third" and the like in the claims, specification and drawings of the present disclosure are used to distinguish different objects, and are not used to describe a particular order. The terms "include" and "contain" used in the specification and claims of the present disclosure indicate the presence of the described features, whole, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof. It should also be understood that the terms used in the specification of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure.

[0030] In the prior art, in order to supply power to the safety domain and the entertainment domain respectively, the power supply in the circuit is usually divided into two independent power supply domains, and each power supply domain uses a respective power supply chip for power supply.

[0031] REFERENCE Figure 1 The independent power supply in the prior art usually includes a plurality of power converters, which supply power to different loads of the safety domain (Safety Field) and the entertainment domain (Unsafety Field) respectively.

[0032] Among them, the Buck converter is a DC-DC (DC-DC) step-down converter, which is used to convert a higher input voltage into a lower output voltage, and to provide different power supply voltages (VLoad1 and VLoad2) for two loads (Load1 and Load2) in the entertainment domain.

[0033] Since each domain and load requires an independent power conversion module, the circuit design is complex and requires more components. At the same time, each independent power module requires an independent power chip and controller, increasing the material cost and PCB area.

[0034] Based on this, refer to Figure 2 The utility model embodiment provides a kind of multi-domain power supply system, including power conversion module 1, security domain protection module 2 and entertainment domain protection module 3.

[0035] Power conversion module 1 is electrically connected to external input voltage, for converting the input voltage into circuit power supply.

[0036] Specifically, power conversion module 1 can adopt DC-DC buck converter (Buck Converter), for converting higher input voltage into required lower output voltage;Linear regulator can also be used, in some power noise sensitive occasions, provide stable low-noise power output;Integrated power management chip (PMIC) can also be used, the chip can integrate multiple power rails and protection functions, realize multiple voltage outputs.In addition, power conversion module 1 can also realize multiple protection mechanisms, such as overcurrent protection, overvoltage protection, short-circuit protection etc., to ensure the safety and stability of system.

[0037] Security domain protection module 2 is electrically connected to the power conversion module 1, for isolating protection to security domain control chip.

[0038] Specifically, security domain protection module 2 can adopt electronic fuse (eFuse), for providing overcurrent protection, overvoltage protection and fault self-locking function, ensure that security domain is isolated from power;Current limiter or current detection circuit can also be used, for monitoring current and automatically cutting off power in abnormal condition;Isolation voltage regulator can also be used, to ensure that the power stability and independence of security domain are maintained when power fluctuation or failure occurs.In addition, filter circuit can also be added to further suppress power noise, improve the power quality of security domain, ensure that control chip is not disturbed.

[0039] Entertainment domain protection module 3 is electrically connected to the power conversion module 1, for isolating protection to entertainment domain load.

[0040] Specifically, entertainment domain protection module 3 can also adopt electronic fuse (eFuse), for providing overcurrent protection, overvoltage protection and fault self-locking function for entertainment domain load, prevent power failure from affecting other circuits;Current limiter or circuit breaker can also be used, when load current exceeds set threshold, automatically cut off power;In addition, filter circuit can also be added to reduce the interference of power noise to entertainment domain;In some applications, relay or solid-state switch can also be used, to ensure that load is quickly isolated when fault is detected.Entertainment domain protection module 3 can also integrate short-circuit protection function to deal with sudden current impact or load failure.

[0041] The power conversion module 1 converts the external input voltage into a stable circuit power supply, and then outputs the power supply for the safety domain protection module 2 and the entertainment domain protection module 3, and the power input ends of the two are directly connected in parallel on the same power output line. Although they share the same power source, through the respective protection circuits (such as electronic fuses or current limiters), it is ensured that when one module fails or abnormally, it will not affect the normal work of the other module, thereby realizing the independent isolation and protection of the two functional domains.

[0042] Further, as an embodiment of the utility model, the entertainment domain protection module 3 includes a first entertainment domain protection unit and a second entertainment domain protection unit.

[0043] The first entertainment domain protection unit is electrically connected to the power conversion module 1 and is used for isolating and protecting the first entertainment domain load.

[0044] The second entertainment domain protection unit is electrically connected to the power conversion module 1 and is used for isolating and protecting the second entertainment domain load.

[0045] The first entertainment domain protection unit and the second entertainment domain protection unit are connected in parallel to the output end of the power conversion module 1.

[0046] Specifically, the entertainment domain protection module 3 can be divided into multiple independent protection units, which are respectively responsible for protecting different entertainment domain loads. For example, the first entertainment domain protection unit is directly connected to the power conversion module 1 and is used for isolating and protecting the load of the first entertainment domain to prevent current overload, overvoltage or other faults from affecting the normal work of the load. Similarly, the second entertainment domain protection unit is also directly connected to the power conversion module 1 and is responsible for isolating and protecting the load of the second entertainment domain. The connection mode between the entertainment domain protection units is parallel, that is, the first and second entertainment domain protection units share the same power output, but the respective protection units work independently to ensure that when one load fails, the normal power supply and operation of the other load will not be affected. This design not only ensures the flexibility of the system, but also enhances the reliability.

[0047] Further, with reference to Figure 3 As an embodiment of the utility model, the power conversion module 1 and the safety domain protection module 2 and / or the entertainment domain protection module 3 are further provided with a decoupling filter module 4 for suppressing voltage fluctuation and filtering high-frequency noise.

[0048] Specifically, the decoupling filter module 4 can adopt a capacitive decoupling circuit, such as a parallel capacitor between the power supply and the ground, to filter out high-frequency noise and smooth voltage fluctuations; an LC filter can also be used to combine inductance and capacitance to suppress high-frequency interference in the power supply and ensure the stability of the power supply output; in addition, an RC low-pass filter can also be used to suppress high-frequency signals to prevent them from affecting the normal operation of the subsequent circuit. For some scenarios with high requirements for power quality, a multi-stage filter circuit (such as a filter composed of multiple capacitors and multiple inductors) can provide better power noise suppression effect. In this way, the decoupling filter module 4 ensures the stability of the voltage and the cleanliness of the noise between the power conversion module 1 and the safety domain and / or entertainment domain protection module 3.

[0049] Further, as an embodiment of the present application, the power conversion module 1 includes a power management chip and a synchronous rectification circuit; the power management chip realizes the conversion of the input voltage by controlling the switching state of the synchronous rectification circuit.

[0050] Specifically, the power management chip is responsible for overall power control, while the synchronous rectification circuit is responsible for the actual execution process of voltage conversion. The power management chip precisely adjusts the switching state in the synchronous rectification circuit by outputting a control signal, so that it is turned on or off at the appropriate time. This process adjusts the energy transfer by controlling the on-off of the input voltage, thereby converting a higher input voltage into a desired lower output voltage. The synchronous rectification circuit improves the efficiency of power conversion and greatly reduces energy loss and voltage fluctuations through precise switching operation, ensuring the stability and reliability of the output voltage.

[0051] Further, as an embodiment of the present application, the synchronous rectification circuit includes a first MOSFET and a second MOSFET, and the first MOSFET and the MOSFET are alternately turned on under the control of the power management chip.

[0052] Specifically, the synchronous rectification circuit is composed of two MOSFETs, which are responsible for different switching operations, and the first MOSFET is usually connected to the high side (high voltage end), and the second MOSFET is connected to the low side (ground end). The power management chip precisely controls the on-off time of the two MOSFETs by sending a control signal, so that they are alternately turned on at a specific time. When the first MOSFET is turned on, the current flows from the high voltage end to the load; when the second MOSFET is turned on, the current flows back to the ground. In this way, the synchronous rectification circuit can achieve efficient voltage conversion, reduce switching loss, and improve power conversion efficiency.

[0053] For example, referring to Figure 4 The circuit diagram of an embodiment of the present application includes the following modules.

[0054] The power conversion module 1 converts the higher input voltage from VBAT (vehicle battery voltage) to a stable 3.3V output (VDD 3V3) through a power management chip to supply subsequent loads. The synchronous rectification circuit consists of two MOSFETs, which control the conduction and turn-off of high-side (HG) and low-side (LG) MOSFETs, respectively, and alternately work under the control of the power management chip to ensure efficient voltage conversion.

[0055] The decoupling filter module 4 includes an inductor and a capacitor, the inductor is connected in series with the output end of the power conversion module 1, and the capacitor is connected in parallel with the output end of the power conversion module 1. At the power output end, the inductor and the capacitor are connected in series to form an LC filter circuit, which is used to smooth the 3.3V voltage, filter out high-frequency noise and suppress voltage fluctuations, and ensure the stability of the power supply.

[0056] The safety domain protection module 2 is used for the protection of the safety domain, and the module is responsible for supplying power to the safety domain control chip and providing overcurrent protection, overvoltage protection and fault self-locking function. If abnormal current or voltage is detected, the safety domain protection module 2 will cut off the power supply to prevent the safety domain from being damaged or affecting other modules.

[0057] The entertainment domain protection module 3 can also protect two loads VLoad1 and VLoad2 through two safety domain protection modules 2 respectively. Each safety domain protection module 2 provides isolated protection for the respective entertainment domain load and prevents faults from affecting the entire system through the fault self-locking function. The loads (VLoad1 and VLoad2) are usually some modules related to entertainment or comfort, such as audio systems, infotainment systems, etc.

[0058] The safety domain protection module 2 and the entertainment domain protection module 3 are connected in parallel to the 3.3V power output end, that is, they share the same power source, but through the respective safety domain protection module 2, independent isolated protection is realized. In this way, if the entertainment domain fails (such as overcurrent or short circuit), the safety domain can still work normally, and vice versa.

[0059] Further, as an embodiment of the utility model, the entertainment domain protection module 3 and the entertainment domain load are provided with a load resistor for voltage division and current limiting.

[0060] Specifically, in the entertainment domain protection module 3 and its load circuit, one or more load resistors are connected in series. These load resistors have two functions: on the one hand, they can partially divide the voltage output from the entertainment domain protection module 3 through the voltage division function, so that the load receives a suitable voltage, ensuring that the load operates within the designed operating voltage range; on the other hand, the load resistor also functions as a current limiter, limiting the current passing through the load to prevent excessive current and avoid damage to the load or circuit. The design of such resistors not only protects the load from overvoltage and overcurrent, but also protects the stability and safety of the entire circuit in the event of a fault.

[0061] The utility model embodiment further discloses a domain controller. The domain controller comprises the multi-domain power supply system in any one of the preceding embodiments.

[0062] Specifically, a domain controller comprising a multi-domain power supply system, the domain controller integrates the aforementioned multi-domain power supply system, and is used for providing power support and protection for different functional domains (such as a safety domain and an entertainment domain). Through the power supply system, the domain controller can realize stable power supply for each functional domain, while providing overcurrent, overvoltage protection and isolation, ensuring that the normal operation of other functional domains is not affected when a functional domain fails, and improving the reliability and safety of the system.

[0063] The utility model embodiment further discloses a vehicle. The vehicle is configured with the domain controller in the preceding embodiments.

[0064] Specifically, the vehicle uses the domain controller with the multi-domain power supply system, which can effectively manage and distribute power, ensuring that each functional domain (such as a safety domain, an entertainment domain, etc.) of the vehicle can obtain stable and independent power supply under different working conditions. At the same time, the domain controller provides isolation protection and fault self-locking function for each functional domain, improving the overall safety, reliability and operating efficiency of the vehicle.

[0065] In some embodiments of the present application, the electronic device can include a controller or a processor, the controller is a single-chip microcomputer, and the controller is integrated with a processor, a memory, a communication module, and the like. The processor can refer to the processor included in the controller. The processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like.

[0066] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-domain power supply system, characterized by, include: The power conversion module (1) is electrically connected to an external input voltage and is used to convert the input voltage into a circuit power supply. The security domain protection module (2) is electrically connected to the power conversion module (1) and is used to isolate and protect the security domain control chip. Entertainment domain protection module (3) is electrically connected to the power conversion module (1) and is used to isolate and protect the entertainment domain load; The security domain protection module (2) and the entertainment domain protection module (3) are connected in parallel to the output terminal of the power conversion module (1).

2. The multi-domain power supply system of claim 1, wherein, The entertainment domain protection module (3) includes a first entertainment domain protection unit and a second entertainment domain protection unit; The first entertainment domain protection unit is electrically connected to the power conversion module (1) and is used to isolate and protect the first entertainment domain load; The second entertainment domain protection unit is electrically connected to the power conversion module (1) and is used to isolate and protect the second entertainment domain load; The first entertainment domain protection unit and the second entertainment domain protection unit are connected in parallel to the output terminal of the power conversion module (1).

3. The multi-domain power supply system of claim 1 or 2, wherein, A load resistor for voltage division and current limiting is provided between the entertainment domain protection module (3) and the entertainment domain load.

4. The multi-domain power supply system of claim 1, wherein, A decoupling filter module (4) for suppressing voltage fluctuations and filtering out high-frequency noise is also provided between the power conversion module (1) and the security domain protection module (2) and / or entertainment domain protection module (3).

5. The multi-domain power supply system of claim 4, wherein, The decoupling filter module (4) includes an inductor and a capacitor. The inductor is connected in series with the output terminal of the power conversion module (1), and the capacitor is connected in parallel with the output terminal of the power conversion module (1).

6. The multi-domain power supply system of claim 1, wherein, The power conversion module (1) includes a power management chip and a synchronous rectification circuit; The power management chip achieves the input voltage conversion by controlling the switching state of the synchronous rectification circuit.

7. The multi-domain power supply system of claim 6, wherein, The synchronous rectification circuit includes a first MOSFET and a second MOSFET, which are alternately turned on under the control of the power management chip.

8. The multi-domain power supply system of claim 1, wherein, The security domain control chip is set to an S32G chip, and the power supply voltage of the circuit is 3.3V.

9. A domain controller, characterized by The domain controller includes the multi-domain power supply system as described in any one of claims 1-8.

10. A vehicle characterized by comprising: The vehicle is equipped with a domain controller as described in claim 9.

Images