Vehicle electrical system and electrical vehicle supply system

Abstract

The embodiment of the application provides a vehicle-mounted electric appliance power supply system and an electric vehicle power supply system, which comprise a power battery, a high-voltage power distribution module, an inverter module, a filter assembly and a vehicle-mounted electric appliance, the maximum output power of the inverter module is greater than the maximum power of the vehicle-mounted electric appliance, the inverter module comprises a fuse, the maximum fusing current of the fuse is greater than the maximum current of the vehicle-mounted electric appliance, the range of the first power is [1.1KW, 4.4KW], and the range of the first current is [5A, 20A]. By increasing the inverter module and the filter assembly, enhancing the maximum output power of the inverter module and improving the maximum fusing current of the fuse of the inverter module, the power demand of the vehicle-mounted electric appliance with high current and high power output in a short time is met, and the stability of the vehicle-mounted electric appliance power supply system is improved.

Description

Technical Field

[0001] This application pertains to the field of vehicle electrical power supply, specifically involving vehicle electrical power supply systems and electric vehicle power supply systems. Background Technology

[0002] With the rapid development of new energy electric vehicles, people's demand for electrical appliances in vehicles has become prominent. Therefore, integrating in-vehicle electrical appliances such as instant hot water dispensers and refrigerators into new energy electric vehicles has become a development trend. However, new energy electric vehicles are often not directly equipped with a 220V power interface, and different types of in-vehicle electrical appliances also require the power supply system of the new energy electric vehicle to meet specific conditions, which makes it difficult for in-vehicle electrical appliances to be used normally in the vehicle. Utility Model Content

[0003] This application provides an on-board electrical power supply system and an electric vehicle power supply system. By adding an inverter module and a filter component, enhancing the maximum output power of the inverter module, and increasing the maximum fusing current of the inverter module's fuse, the power demand of on-board electrical appliances that require high current and high power output for a short period of time can be met, which is beneficial to improving the stability of the on-board electrical power supply system.

[0004] In a first aspect, embodiments of this application provide a vehicle-mounted electrical power supply system, the vehicle-mounted electrical power supply system comprising: Power battery; A high-voltage power distribution module is connected to the power battery and the inverter module respectively. The high-voltage power distribution module is used to distribute the power from the power battery to the inverter module. The inverter module is used to invert the voltage of the power battery to a preset voltage. The maximum output power of the inverter module is greater than the maximum power of the vehicle electrical appliances. The inverter module includes a fuse, and the maximum fusing current of the fuse is greater than the maximum current of the vehicle electrical appliances. A filtering component, wherein the filtering component is connected to the inverter module; The vehicle electrical appliance is connected to the filter assembly. The vehicle electrical appliance outputs a first current and a first power at a preset voltage for a preset time period. The range of the first power is [1.1KW, 4.4KW], and the range of the first current is [5A, 20A].

[0005] In one possible example, the inverter module includes an energy storage element with a capacity greater than a preset capacity and a rated voltage greater than the bus voltage of the power battery.

[0006] In one possible example, the high-voltage power distribution module includes a first relay, the inverter module includes a second relay, the rated current of the first relay and the second relay is greater than a first current, and the first relay and the second relay maintain the rated current for a duration greater than a preset duration.

[0007] In one possible example, the vehicle electrical power supply system includes a high-voltage interlock system connected to the high-voltage power distribution module.

[0008] In one possible example, the vehicle electrical power supply system includes a load identification module for identifying the load type of the vehicle electrical appliances connected to the vehicle electrical power supply system.

[0009] In one possible example, the inverter module includes a high-power output mode, the duration of which is longer than a preset duration.

[0010] In one possible example, the high-voltage power distribution module and the inverter module are located in the front engine compartment of the electric vehicle; or... The high-voltage power distribution module and the inverter module are mounted on the chassis of the electric vehicle; or, The high-voltage power distribution module and the inverter module are located at the bottom or side of the trunk of the electric vehicle.

[0011] In one possible example, the vehicle electrical power supply system includes a battery management system for monitoring the status of the power battery.

[0012] In one possible example, the vehicle electrical power supply system includes a high-voltage insulation monitoring module, which is used to monitor the insulation status of the power supply circuit of the vehicle electrical appliances.

[0013] Secondly, embodiments of this application provide an electric vehicle power supply system, which includes the aforementioned on-board electrical power supply system.

[0014] As can be seen, in this embodiment of the application, by adding an inverter module and a filter component, enhancing the maximum output power of the inverter module, and increasing the maximum fusing current of the inverter module's fuse, the power demand of vehicle electrical appliances that output high current and high power in a short period of time can be met, which is beneficial to improving the stability of the vehicle electrical appliance power supply system. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the architecture of an on-board electrical power supply system provided in an embodiment of this application; Figure 2 This is a schematic diagram of another vehicle electrical power supply system provided in an embodiment of this application; Figure 3 This is a schematic diagram of the architecture of an inverter module provided in an embodiment of this application; Figure 4 This application provides an embodiment of a high-voltage power distribution module architecture diagram; Figure 5 This is a schematic diagram of an electric vehicle power supply system provided in an embodiment of this application. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0018] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] In the embodiments of this application, "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone; A and B exist simultaneously; B exists alone. Among them, A and B can be singular or plural.

[0021] In this embodiment, the symbol " / " can indicate that the preceding and following objects are in an "or" relationship. Alternatively, the symbol " / " can also represent a division sign, i.e., performing a division operation. For example, A / B can mean A divided by B.

[0022] In the embodiments of this application, "at least one item" or its similar expression refers to any combination of these items, including any combination of a single item or a plurality of items. "One or more" means one or more, while "multiple" means two or more. For example, "at least one item" of a, b, or c can represent the following seven cases: a, b, c; a and b; a and c; b and c; a, b, and c. Each of a, b, and c can be an element or a set containing one or more elements.

[0023] In the embodiments of this application, "equal to" can be used with "greater than" and is applicable to technical solutions used when "greater than" is used; it can also be used with "less than" and is applicable to technical solutions used when "less than" is used. When "equal to" is used with "greater than", it is not used with "less than"; when "equal to" is used with "less than", it is not used with "greater than".

[0024] To better understand the solutions of the embodiments of this application, the background that may be involved in the embodiments of this application will be introduced below.

[0025] Please see Figures 1-4 , Figure 1 This is a schematic diagram of the architecture of an on-board electrical power supply system provided in an embodiment of this application; Figure 2 This is a schematic diagram of another vehicle electrical power supply system provided in an embodiment of this application; Figure 3 This is a schematic diagram of the architecture of an inverter module provided in an embodiment of this application; Figure 4 This application provides a schematic diagram of the architecture of a high-voltage power distribution module.

[0026] The vehicle electrical power supply system 1 provided in this application includes: a power battery 10, a high-voltage power distribution module 20, an inverter module 30, a filter component 40, and vehicle electrical appliances 50. The high-voltage power distribution module 20 is connected to the power battery 10 and the inverter module 30, the filter component 40 is connected to the inverter module 30, and the vehicle electrical appliances 50 are connected to the filter component 40.

[0027] Among them, the high-voltage power distribution module 20 is used to distribute the power of the power battery 10 to the inverter module 30.

[0028] The inverter module 30 is used to invert the voltage of the power battery 10 to a preset voltage. The maximum output power of the inverter module 30 is greater than the maximum power of the vehicle electrical appliance 50. The inverter module 30 includes a fuse 31, and the maximum fusing current of the fuse 31 is greater than the maximum current of the vehicle electrical appliance 50. To meet the power demand of the vehicle electrical appliance 50, which outputs high current and high power within a preset time period, the maximum output power of the inverter module 30 must be greater than the maximum power of the vehicle electrical appliance 50, and the maximum fusing current of the fuse 31 must be greater than the maximum current of the vehicle electrical appliance 50, so as to avoid the fuse 31 blowing abnormally when the vehicle electrical appliance is connected for use, thereby affecting the normal use of the vehicle electrical appliance.

[0029] The preset time period is a relatively short period of time, such as 5-10 minutes.

[0030] The preset voltage can be 220V or 110V, and there is no limitation here.

[0031] The power battery can output 400V, 600V, and 800V high voltage, which is not limited here.

[0032] Among them, the high-voltage power distribution module can be a PDU (Power Distribution Unit). The PDU distributes the high-voltage electricity from the power battery to subsystems such as the inverter module 30 and the motor controller through copper busbars and relays.

[0033] The inverter module can be a bidirectional on-board charger (OBC), which enables the vehicle to discharge to the outside. It can convert the high-voltage DC power of the power battery 10 into 220V / 110V AC power for use by the vehicle electrical appliances 50.

[0034] Among them, the maximum fusing current of fuse 31 is 22A, the rated current of relay is 25A, and the maximum output power of inverter module is 4.8KW.

[0035] For example, the vehicle electrical appliance 50 outputs high current and high power within 5 minutes under 220V voltage, that is, it outputs with the first current and the first power. Specifically, the vehicle electrical appliance includes a vehicle instant hot water dispenser. When the preset voltage is 220V, the range of the first power of the vehicle electrical appliance 50 is [1.1KW, 4.4KW], and the range of the first current is [5A, 20A]. The maximum fusing current of the fuse 31 is greater than 20A, the rated current of the relay is greater than 20A, and the maximum output power of the inverter module is greater than 4.4KW. When the first current is 20A, the first power of the vehicle electrical appliance 50 is 4.4KW, the maximum fusing current of the fuse 31 is 22A, the rated current of the relay is 25A, and the maximum output power of the inverter module is 4.8KW; when the first current is 10A, the first power of the vehicle electrical appliance 50 is 2.2KW, the maximum fusing current of the fuse 31 is 22A, the rated current of the relay is 25A, and the maximum output power of the inverter module is 4.8KW; when the first current is 5A, the first power of the vehicle electrical appliance 50 is 1.1KW, the maximum fusing current of the fuse 31 is 22A, the rated current of the relay is 25A, and the maximum output power of the inverter module is 4.8KW.

[0036] Among them, the vehicle electrical appliances 50 that output high current and high power during the preset time period include, but are not limited to, vehicle instant hot water dispensers, vehicle kettles, and vehicle hot water cups.

[0037] The filter component 40 can be an LC filter. The waveform of the 220V AC power output by the inverter module is not an ideal sine wave, but a square wave or a corrected wave with switching ripple. Direct use of this distorted waveform will cause the vehicle electrical appliances 50 to heat up and affect their lifespan. Therefore, the filter component 40 can correct the distorted waveform into a pure sine wave, while suppressing high-frequency electromagnetic interference, ensuring the stable operation of the vehicle electrical appliances 50.

[0038] As can be seen, in this embodiment of the application, by adding an inverter module 30 and a filter component 40, enhancing the maximum output power of the inverter module, and increasing the maximum fusing current of the fuse 31 of the inverter module 30, the power demand of the vehicle electrical appliances that output high current and high power in a short period of time can be met, which is beneficial to improving the stability of the vehicle electrical appliance power supply system.

[0039] In one possible example, the inverter module 30 includes an energy storage element 32, the energy storage element 32 having a capacity greater than a preset capacity, and the rated voltage of the energy storage element 32 being greater than the bus voltage of the power battery 10.

[0040] Among them, energy storage element 32 is a DC-side bus capacitor.

[0041] The preset battery capacity can be set manually or by system default, and there is no limitation here. For example, the preset battery capacity is 950uF.

[0042] The energy storage element 32 has a capacitance greater than the preset capacitance in order to store enough charge to buffer instantaneous surge current and avoid a sudden drop in bus voltage.

[0043] The rated voltage of the energy storage element 32 is greater than the bus voltage of the power battery 10 in order to prevent voltage spikes from breaking down the DC side bus capacitor when the vehicle electrical appliances are started.

[0044] As can be seen, in this example, the stability of the inverter module 30 is improved by the targeted design of the energy storage element 32.

[0045] In one possible example, the high-voltage power distribution module 20 includes a first relay 21, the inverter module 30 includes a second relay 33, the rated current of the first relay 21 and the second relay 33 is greater than a first current, and the first relay 21 and the second relay 33 maintain the rated current for a duration greater than a preset duration.

[0046] The preset duration is related to the usage time of the vehicle's electrical appliances. It can be set manually or by system default, and there is no limitation here. For example, the usage time of a vehicle instant hot water dispenser is usually 5-10 minutes, and the preset duration can be 10 minutes.

[0047] The rated current of the relay is 25A.

[0048] Among them, the rated current of the first relay 21 and the second relay 33 is greater than the first current, and the duration for which the first relay 21 and the second relay maintain the rated current is greater than the preset duration. The short-time high current withstand capability of the relays meets the switching requirements when the vehicle-mounted instant hot water dispenser starts and stops.

[0049] As can be seen, in this example, the stability of the power supply to the vehicle electrical power supply system 1 is improved by the targeted design of the first relay 21 and the second relay 33.

[0050] In one possible example, the vehicle electrical power supply system includes a high-voltage interlock system 60 connected to the high-voltage power distribution module 20; the high-voltage interlock system 60 is used to control the opening and closing of the first relay 21.

[0051] The high voltage interlocking system (HVIL, High Voltage Interlock Loop) 60 monitors the connection status of all high voltage connectors through a low voltage signal loop. When a loose interface or human-caused disconnection is detected, the high voltage interlocking system will immediately trigger the first relay 21 in the high voltage distribution module 20 to cut off the high voltage and prevent the generation of electric arc.

[0052] Among them, the high-voltage interlock system 60 uses shielded twisted-pair cable with current sensing to synchronously collect high-voltage current and interlock signal. When the high-voltage connector is slightly loose, causing the contact resistance to increase, the current fluctuation amplitude exceeds 5%, which can trigger an early warning.

[0053] As can be seen, in this example, the safety of the vehicle electrical power supply system 1 is increased by adding a high-voltage interlock system 60.

[0054] In one possible example, the vehicle electrical power supply system 1 includes a load identification module 70, which is used to identify the load type of the vehicle electrical appliances connected to the vehicle electrical power supply system 1.

[0055] Among them, the load identification module 70 can distinguish whether the vehicle electrical appliances connected to the vehicle electrical power supply system 1 are short-term high-current devices based on current waveform feature analysis.

[0056] In one possible example, the inverter module 30 includes a normal power mode and a high power output mode, wherein the high power output mode lasts for a duration longer than a preset duration, and the inverter module 30 is used to switch to the high power output mode when the load type of the vehicle electrical appliance is detected to be a first load type.

[0057] In the normal power mode, the inverter module 30 can operate at its rated power. In the high power output mode, the inverter module can operate at 1.2 times its rated power. The duration of a single high power output mode is longer than the preset duration, ensuring that the vehicle-mounted instant hot water dispenser can be used normally once.

[0058] Among them, the first type of vehicle electrical equipment is a short-term high-current, high-power device.

[0059] The inverter module 30 can be connected to the load identification module 70. The inverter module 30 can obtain load type information from the load identification module 70 and analyze the load type information to determine whether the connected load is a short-term high-current device.

[0060] As can be seen, in this example, by designing the inverter module 30 in both conventional power mode and high power output mode, the normal operation of the vehicle electrical appliances 50 is ensured, which helps to improve the stability of the vehicle electrical appliance power supply system 1.

[0061] In one possible example, the high-voltage power distribution module 20 and the inverter module 30 are located in the front engine compartment of the electric vehicle; or, the high-voltage power distribution module 20 and the inverter module 30 are located in the chassis of the electric vehicle; or, the high-voltage power distribution module 20 and the inverter module 30 are located at the bottom or side of the trunk of the electric vehicle.

[0062] The inverter module 30 is positioned close to the high-voltage power distribution module 20. When the high-voltage power distribution module 20 is located in the front engine compartment of the electric vehicle, the inverter module 30 can also be integrated into the front engine compartment, with the wiring integrated into the wiring harness area connecting the front engine compartment to the electric vehicle's passenger compartment, thus providing an electrical interface for the vehicle's electrical appliances 50 within the passenger compartment. Similarly, when the high-voltage power distribution module 20 is located in the chassis of the electric vehicle, the inverter module 30 can also be integrated into the chassis, with the wiring integrated into the wiring harness area connecting the chassis to the electric vehicle's passenger compartment, thus providing an electrical interface for the vehicle's electrical appliances 50 within the passenger compartment. Furthermore, when the high-voltage power distribution module 20 is located at the bottom or side of the electric vehicle's trunk, the inverter module 30 can also be integrated into the bottom or side of the trunk, with the wiring integrated into the wiring harness area connecting the bottom or side of the trunk to the electric vehicle's passenger compartment, thus providing an electrical interface for the vehicle's electrical appliances 50 within the passenger compartment.

[0063] The inverter module can also provide a dedicated 220V interface in the cabin for use by other electrical appliances.

[0064] As can be seen, in this example, by adding inverter module 30 and filter component 40, and by increasing the maximum output power of inverter module 30 and increasing the maximum fusing current of fuse 31 of inverter module 30, the power demand of vehicle electrical appliances 50 with high current and high power output in a short period of time can be met, which is beneficial to improving the stability of vehicle electrical appliance power supply system 1.

[0065] In one possible example, the vehicle electrical power supply system 1 includes a battery management system 80 for monitoring the status of the power battery 10.

[0066] The battery management system 80 monitors the voltage, temperature and state of charge of the power battery 10 in real time via the CAN bus. When overvoltage or overtemperature is detected, the battery management system 80 will trigger the first relay 21 to cut off the high voltage.

[0067] In one possible example, the vehicle electrical power supply system includes a high-voltage insulation monitoring module 90, which is used to monitor the insulation status of the power supply circuit of the vehicle electrical appliance 50.

[0068] Among them, the high-voltage insulation monitoring module 90 can be a high-voltage insulation monitor, which can monitor the insulation status of the power supply circuit of the vehicle electrical appliance 50 in real time. When the insulation status is abnormal, the first relay 21 is triggered to cut off the high voltage.

[0069] In one possible example, the vehicle electrical power supply system 1 includes a power control unit, which is used to determine, when a vehicle electrical appliance of a first load type and a vehicle electrical appliance of a second load type are detected to be operating simultaneously, a target vehicle electrical appliance of a second load type for which power reduction is required, and to control the reduction of power of the target vehicle electrical appliance of the at least one second load type.

[0070] Among them, the second type of vehicle electrical equipment is a device that does not output high current and high power for a short period of time.

[0071] When the first type of vehicle electrical appliance and the second type of vehicle electrical appliance work at the same time, considering the limited total power and the characteristic that the first type of vehicle electrical appliance is used for a short time and requires high power, the usage needs of the first type of vehicle electrical appliance can be given priority, and the working power of the second type of vehicle electrical appliance can be reduced accordingly.

[0072] Optionally, when the vehicle electrical appliances of the second load type are multiple audio devices, the power control unit is used to determine the user's seating position, determine at least one target audio device among the multiple audio devices that requires power reduction based on the seating position, and control the reduction of the power of the at least one target audio device.

[0073] The power control unit connects to the camera in the electric vehicle to acquire video data captured by the camera and analyze the video data to determine the user's seating position.

[0074] For example, when the seating position is in the front row, the power of the audio equipment located near the rear seats can be reduced, thus lowering the power consumption of the audio equipment without affecting the user experience. Similarly, when the seating position is in the left-hand seat, the power of the audio equipment located near the right-hand seat can be reduced, again without compromising the user experience.

[0075] Please see Figure 5 , Figure 5 This is a schematic diagram of an electric vehicle power supply system provided in an embodiment of this application, such as... Figure 5 As shown, the electric vehicle power supply system 1000 includes the aforementioned on-board electrical power supply system 1.

[0076] In one possible example, the vehicle electrical power supply system 1 includes: a power battery 10, a high-voltage power distribution module 20, an inverter module 30, a filter component 40, and a vehicle electrical appliance 50. The high-voltage power distribution module 20 is connected to the power battery 10 and the inverter module 30, the filter component 40 is connected to the inverter module 30, and the vehicle electrical appliance 50 is connected to the filter component 40. The high-voltage power distribution module 20 is used to distribute the power from the power battery 10 to the inverter module 30; the inverter module 30 is used to invert the voltage of the power battery 10 to a preset voltage, and the maximum output power of the inverter module 30 is greater than the maximum power of the vehicle electrical appliance 50; the inverter module 30 includes a fuse 31, and the maximum fusing current of the fuse 31 is greater than the maximum current of the vehicle electrical appliance 50; the vehicle electrical appliance includes a vehicle instant hot water dispenser, and when the preset voltage is 220V, the first power range of the vehicle instant hot water dispenser is [1.1KW, 4.4KW], and the first current range is [5A, 20A].

[0077] As can be seen, in this embodiment of the application, by adding an inverter module 30 and a filter component 40, enhancing the maximum output power of the inverter module 30, and increasing the maximum fusing current of the fuse 31 of the inverter module 30, the power demand of the vehicle electrical appliances 50, which outputs high current and high power in a short period of time, can be met, which is beneficial to improving the stability of the electric vehicle power supply system 1000.

[0078] In one possible example, the inverter module 30 includes an energy storage element 32, the energy storage element 32 having a capacity greater than a preset capacity, and the rated voltage of the energy storage element 32 being greater than the bus voltage of the power battery 10.

[0079] In one possible example, the high-voltage power distribution module 20 includes a first relay 21, the inverter module 30 includes a second relay 33, the rated current of the first relay 21 and the second relay 33 is greater than a first current, and the first relay 21 and the second relay 33 maintain the rated current for a duration greater than a preset duration.

[0080] In one possible example, the vehicle electrical power supply system includes a high-voltage interlock system 60 connected to the high-voltage power distribution module 20; the high-voltage interlock system 60 is used to control the opening and closing of the first relay 21.

[0081] In one possible example, the vehicle electrical power supply system 1 includes a load identification module 70, which is used to identify the load type of the vehicle electrical appliances connected to the vehicle electrical power supply system 1.

[0082] In one possible example, the inverter module 30 includes a normal power mode and a high power output mode, wherein the high power output mode lasts for a duration longer than a preset duration, and the inverter module 30 is used to switch to the high power output mode when the load type of the vehicle electrical appliance is detected to be a first load type.

[0083] In one possible example, the high-voltage power distribution module 20 and the inverter module 30 are located in the front engine compartment of the electric vehicle; or, the high-voltage power distribution module 20 and the inverter module 30 are located in the chassis of the electric vehicle; or, the high-voltage power distribution module 20 and the inverter module 30 are located at the bottom or side of the trunk of the electric vehicle.

[0084] In one possible example, the vehicle electrical power supply system 1 includes a battery management system 80 for monitoring the status of the power battery 10.

[0085] In one possible example, the vehicle electrical power supply system includes a high-voltage insulation monitoring module 90, which is used to monitor the insulation status of the power supply circuit of the vehicle electrical appliance 50.

[0086] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0087] In this application, the terms "embodiment" and "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of these phrases in various locations throughout the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described in this application can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the various embodiments of this application can be arbitrarily combined to form another embodiment that does not depart from the spirit and scope of the technical solution of this application, provided there is no contradiction between them.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A vehicle-mounted electrical power supply system, characterized in that, include: Power battery; A high-voltage power distribution module, which is connected to the power battery and the inverter module respectively; The inverter module has a maximum output power greater than the maximum power of the vehicle's electrical appliances; the inverter module includes a fuse, and the maximum fusing current of the fuse is greater than the maximum current of the vehicle's electrical appliances. A filtering component, wherein the filtering component is connected to the inverter module; The vehicle electrical appliance is connected to the filter assembly. The vehicle electrical appliance outputs a first current and a first power at a preset voltage for a preset time period. The range of the first power is [1.1KW, 4.4KW], and the range of the first current is [5A, 20A].

2. The system according to claim 1, characterized in that, The inverter module includes an energy storage element, the energy storage element having a capacity greater than a preset capacity, and the rated voltage of the energy storage element being greater than the bus voltage of the power battery.

3. The system according to claim 2, characterized in that, The high-voltage power distribution module includes a first relay, and the inverter module includes a second relay. The rated current of the first relay and the second relay is greater than the first current, and the duration for which the first relay and the second relay maintain the rated current is greater than a preset duration.

4. The system according to claim 3, characterized in that, The vehicle electrical power supply system includes a high-voltage interlock system, which is connected to the high-voltage power distribution module.

5. The system according to claim 1, characterized in that, The vehicle electrical power supply system includes a load identification module, which is used to identify the load type of the vehicle electrical appliances connected to the vehicle electrical power supply system.

6. The system according to claim 5, characterized in that, The inverter module includes a high-power output mode, wherein the duration of a single high-power output mode is longer than a preset duration.

7. The system according to claim 1, characterized in that, The high-voltage power distribution module and the inverter module are located in the front engine compartment of the electric vehicle; or... The high-voltage power distribution module and the inverter module are mounted on the chassis of the electric vehicle; or, The high-voltage power distribution module and the inverter module are located at the bottom or side of the trunk of the electric vehicle.

8. The system according to claim 1, characterized in that, The vehicle electrical power supply system includes a battery management system, which is used to monitor the status of the power battery.

9. The system according to claim 1, characterized in that, The vehicle electrical power supply system includes a high-voltage insulation monitoring module, which is used to monitor the insulation status of the power supply circuit of the vehicle electrical appliances.

10. A power supply system for an electric vehicle, characterized in that, The electric vehicle power supply system includes the on-board electrical power supply system as described in any one of claims 1-9.

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