Power supply system and vehicle

Abstract

The invention provides a power supply system and a vehicle, and belongs to the technical field of vehicles. The power supply system comprises a high-voltage battery pack, a first HV-48V DCDC, a 48V battery, an intelligent distribution box and a plurality of low-voltage loads. The HV-48V DCDC is electrically connected with the high-voltage battery pack and the intelligent power distribution box, and the high-voltage battery pack is used for supplying power to the intelligent power distribution box through the HV-48V DCDC; the 48V battery is electrically connected with the intelligent power distribution box, and the 48V battery is used for supplying power to the intelligent power distribution box; and the intelligent distribution box is also electrically connected with the plurality of low-voltage loads and is used for supplying power to the plurality of low-voltage loads. According to the power supply device, the first HV-48V DCDC, the 48V battery and the intelligent power distribution box are adopted to supply power to the low-voltage load, and the load power requirement of the whole vehicle can be met more easily.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicles, and particularly to a power supply system and a vehicle. Background Art

[0002] With the continuous deepening of the electrification and intelligence of new energy vehicles, electric drive gradually replaces hydraulic and mechanical drives, etc. The power of electrical loads continues to increase, and the vehicle load current has exceeded 200A, and it is expected to exceed 400A in a few years. Problems such as the layout, power loss, and voltage drop of the existing 12V system are becoming increasingly prominent, and innovation is required from the perspective of low-voltage electrical system design. The 48V system can improve the vehicle's electric power carrying capacity, reduce the wire diameter, and reduce power loss, providing support for the development of vehicle electrification.

[0003] Currently, for extremely high-end models, additional devices such as HV-48V DCDC and 48V lithium batteries are added on the basis of the existing 12V electrical system to form a 48V mild hybrid electrical system, but this 48V mild hybrid electrical system can gradually no longer meet the vehicle's load power requirements. Summary of the Invention

[0004] The present disclosure provides a power supply system and a vehicle, which can solve the problems in the related art. The technical solutions are as follows:

[0005] On the one hand, the present disclosure provides a power supply system, which includes a high-voltage battery pack, a first HV-48V DCDC (High Voltage-48V DC-to-DC converter), a 48V battery, an intelligent power distribution box, and a plurality of low-voltage loads;

[0006] The HV-48V DCDC is electrically connected to both the high-voltage battery pack and the intelligent power distribution box, and the high-voltage battery pack is used to supply power to the intelligent power distribution box through the HV-48V DCDC;

[0007] The 48V battery is electrically connected to the intelligent power distribution box, and the 48V battery is used to supply power to the intelligent power distribution box;

[0008] The intelligent power distribution box is also electrically connected to the plurality of low-voltage loads, and the intelligent power distribution box is used to supply power to the plurality of low-voltage loads.

[0009] In a possible implementation manner, a second HV-48V DCDC is provided in the high-voltage battery pack, the second HV-48V DCDC is electrically connected to the 48V battery, and the second HV-48V DCDC is used to charge the 48V battery.

[0010] In a possible implementation, a μDCDC (micro DC-DC converter) is disposed in the high-voltage battery pack. The μDCDC is electrically connected to at least one low-voltage load among the multiple low-voltage loads, and the μDCDC is configured to provide 48V constant power for the at least one low-voltage load when the vehicle is powered off.

[0011] In a possible implementation, the intelligent power distribution box includes a 48V power distribution box, a thermal management controller, and a first 48V-12V DCDC;

[0012] The 48V power distribution box, the thermal management controller, and the first 48V-12V DCDC (48V-12V DC-to-DC converter, a DC-DC converter for 48V-12V) are all electrically connected to the first HV-48V DCDC;

[0013] The 48V power distribution box is electrically connected to at least one first 48V load among the multiple low-voltage loads, and is configured to perform primary power distribution for the first 48V load;

[0014] The thermal management controller is electrically connected to at least one second 48V load among the multiple low-voltage loads, and is configured to supply power to the second 48V load;

[0015] The first 48V-12V DCDC is electrically connected to at least one first 12V load among the multiple low-voltage loads, and is configured to supply power to the first 12V load.

[0016] In a possible implementation, the power supply system further includes a zone controller, and the zone controller is electrically connected to the 48V power distribution box and at least one third 48V load among the multiple low-voltage loads;

[0017] The 48V power distribution box is further configured to supply power to the zone controller, and the zone controller is configured to supply power to the third 48V load.

[0018] In a possible implementation, a second 48V-12V DCDC is disposed in the zone controller, and the second 48V-12V DCDC is electrically connected to at least one second 12V load among the multiple low-voltage loads, and is configured to supply power to the second 12V load.

[0019] In a possible implementation, the power supply system further includes a cockpit domain controller and an autonomous driving domain controller;

[0020] The cockpit domain controller is electrically connected to at least one cockpit load among the first 48V-12V DCDC and the multiple first 12V loads, and the autonomous driving domain controller is electrically connected to at least one autonomous driving load among the first 48V-12V DCDC and the multiple first 12V loads;

[0021] The first 48V-12V DCDC is configured to supply power to the cockpit load through the cockpit domain controller and supply power to the autonomous driving load through the autonomous driving domain controller.

[0022] In a possible implementation, the cockpit load includes a speaker and a display screen, and the autonomous driving load includes a radar and a camera.

[0023] In a possible implementation, the first 48V load includes a by-wire braking system and a by-wire steering system, and the second 48V load includes a cooling fan, a blower, and a cooling water pump.

[0024] On the other hand, the present disclosure provides a vehicle, which includes the power supply system as described in any one of the above.

[0025] The technical solution provided by the present disclosure at least includes the following beneficial effects:

[0026] The present disclosure provides a power supply system, which uses a first HV-48V DCDC, a 48V battery, and an intelligent power distribution box to supply power to low-voltage loads, and is more likely to meet the load power requirements of the entire vehicle.

[0027] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 is a schematic structural diagram of a power supply system shown in an embodiment of the present disclosure;

[0030] Figure 2 is a schematic circuit topology diagram of a first HV-48V DCDC shown in an embodiment of the present disclosure;

[0031] Figure 3 is a schematic circuit topology diagram of a μDCDC shown in an embodiment of the present disclosure;

[0032] Figure 4 is a schematic structural diagram of an intelligent distribution box shown in an embodiment of the present disclosure;

[0033] Figure 5 is shown in an embodiment of the present disclosure Figure 4 a partial enlarged schematic diagram of part A therein;

[0034] Figure 6 is shown in an embodiment of the present disclosure Figure 4 a partial enlarged schematic diagram of part B therein;

[0035] Figure 7 is shown in an embodiment of the present disclosure Figure 4 a partial enlarged schematic diagram of part C therein;

[0036] Figure 8 is shown in an embodiment of the present disclosure Figure 4 a partial enlarged schematic diagram of part D therein;

[0037] Figure 9 is a schematic structural diagram of a zone controller shown in an embodiment of the present disclosure. Detailed implementation manners

[0038] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", "third" and similar terms used in the specification and claims of the present patent application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "an" do not denote a quantity limitation, but mean that there is at least one. The terms such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0039] To make the objectives, technical solutions and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0040] The embodiments of the present disclosure provide a power supply system. Refer to Figure 1, the power supply system includes a high-voltage battery pack, a first HV-48V DCDC, a 48V battery, an intelligent power distribution box, and multiple low-voltage loads.

[0041] The HV-48V DCDC is electrically connected to both the high-voltage battery pack and the intelligent power distribution box. The high-voltage battery pack is used to supply power to the intelligent power distribution box through the HV-48V DCDC. The 48V battery is electrically connected to the intelligent power distribution box, and the 48V battery is used to supply power to the intelligent power distribution box. The intelligent power distribution box is also electrically connected to multiple low-voltage loads, and the intelligent power distribution box is used to supply power to multiple low-voltage loads.

[0042] In implementation, on the one hand, the high-voltage battery pack delivers high-voltage electricity to the HV-48V DCDC, and the HV-48V DCDC converts the received high-voltage electricity into 48V electrical energy and delivers this 48V electrical energy to the intelligent power distribution box. On the other hand, the 48V battery can also deliver 48V electrical energy to the intelligent power distribution box.

[0043] The intelligent power distribution box will reasonably distribute the received 48V electrical energy, deliver it to multiple low-voltage loads, thereby supplying power to the low-voltage loads so that the low-voltage loads can operate normally.

[0044] The circuit topology of the first HV-48V DCDC in the embodiments of the present disclosure can be as Figure 2 shown, adopting the Buck buck type to ensure buck output to 48V, and the DCDC power can be selected according to the 48V load power demand. Of course, the circuit topology of the first HV-48V DCDC can also be other reasonable structures, and the embodiments of the present disclosure do not limit this.

[0045] In this way, the power supply system uses the first HV-48V DCDC, the 48V battery, and the intelligent power distribution box to supply power to the low-voltage loads, making it easier to meet the load power requirements of the whole vehicle. It reduces the copper usage of the whole vehicle, improves the power capacity of the whole vehicle, and is more likely to meet the power requirements of new energy vehicle models. And, compared with the 48V mild hybrid system in the prior art, the power supply system provided by the embodiments of the present disclosure cancels the traditional 12V battery and HV-12V DC-DC, reducing the system cost.

[0046] In a possible implementation manner, referring to Figure 1 , a second HV-48V DCDC is provided in the high-voltage battery pack. The second HV-48V DCDC is electrically connected to the 48V battery, and the second HV-48V DCDC is used to charge the 48V battery.

[0047] In implementation, a second HV-48V DCDC may be integrated in the high-voltage battery pack. When the 48V battery meets the preset charging conditions, the second HV-48V DCDC may convert the high-voltage electricity into 48V electrical energy and transmit the 48V electrical energy to the 48V battery, thereby powering the 48V battery.

[0048] The second HV-48V DCDC can be integrated with the high-voltage system PDU (Power Distribution Unit), OBC (On Board Charger), fast charging, slow charging, front drive motor, motor controller, etc. in the vehicle into an all-in-one controller, thereby reducing the volume and saving wiring harnesses, thereby increasing the power capacity of the entire vehicle, meeting the power requirements of new energy vehicles, and reducing costs.

[0049] Among them, the preset charging condition may include: the remaining power of the 48V battery is lower than the preset power. Of course, the preset charging condition may also be other reasonable settings, which is not limited in the embodiments of the present disclosure.

[0050] In one possible implementation, see Figure 1 A μDCDC is provided in the high-voltage battery pack, and the μDCDC is electrically connected to at least one of the multiple low-voltage loads. The μDCDC is used to provide 48V normal power to at least one low-voltage load when the vehicle is powered off.

[0051] In practice, the high-voltage battery pack can have a built-in low-power 48VμDCDC, which can be output when the vehicle is OFF. The output voltage can be adjusted by the BMS (Battery Management System) to provide 48V normal power for low-voltage loads that need to work when the vehicle is powered off, to ensure that they can work for a long time.

[0052] In this way, the intelligent charging is reduced or cancelled, thereby reducing the energy consumption of the whole vehicle, and ensuring the requirements of the vehicle's sleep and wake-up strategy and special scenarios such as OTA. For example, when the vehicle is OFF, μDCDC can power low-voltage loads such as the vehicle refrigerator to enable it to work for a long time. At the same time, it can also reduce the battery capacity of the low-voltage battery.

[0053] The μDCDC can be arranged in a high-voltage battery pack and can be integrated and supplied by the high-voltage battery pack. The circuit topology of the μDCDC can be as follows: Figure 3As shown, its rated power can be designed according to the power demand of the load when the vehicle is OFF, usually around 300W, set to the normally closed state, output in the OFF state, the output voltage can be adjusted by the BMS, with functional safety ASIL-B (an international standard for evaluating the safety performance of automotive electronic systems), it is necessary to ensure reliable disconnection, and it has protection functions such as overvoltage, undervoltage, overcurrent, short circuit, overtemperature, and reverse polarity.

[0054] In a possible implementation, referring to Figure 1 , the intelligent power distribution box includes a 48V power distribution box, a thermal management controller, and a first 48V-12V DCDC. The 48V power distribution box, the thermal management controller, and the first 48V-12V DCDC are all electrically connected to the first HV-48V DCDC. The 48V power distribution box is electrically connected to at least one first 48V load among multiple low-voltage loads for primary power distribution to the first 48V load. The thermal management controller is electrically connected to at least one second 48V load among multiple low-voltage loads for power supply to the second 48V load. The first 48V-12V DCDC is electrically connected to at least one first 12V load among multiple low-voltage loads for power supply to the first 12V load.

[0055] In implementation, the 48V power distribution box can reasonably distribute the 48V electrical energy delivered by the first HV-48V DCDC to supply power to the first 48V load among the low-voltage loads.

[0056] In the embodiments of the present disclosure, referring to Figure 4 and Figure 8 ( Figure 8 is Figure 4 a partial enlarged schematic diagram of part D in

[0057] ), the first 48V load can include an electromechanical brake system and an electric power steering system. Of course, the first 48V load can also include other devices.

[0058] Among them, the electromechanical brake system can be an EMB (Electromechanical Brake), and the electric power steering system can be an EPS (Electric Power Steering).

[0059] In the embodiments of the present disclosure, referring to Figure 4 and Figure 5 ( Figure 5 is Figure 4 a partial enlarged schematic diagram of part A in Figure 5The TDU in (i.e., the thermal management controller), the second 48V load may include a cooling fan, a blower, and a cooling water pump. Of course, it may also include other thermal management devices, and the embodiments of the present disclosure do not make specific limitations thereto.

[0060] A DCDC may also be provided in the thermal management controller, and the DCDC can convert the received 48V electrical energy into 5V or 12V electrical energy to supply power to the thermal management actuator or sensor in the thermal management system.

[0061] The first 48V-12V DCDC can convert the 48V electrical energy delivered by the first HV-48V DCDC into 12V electrical energy and deliver it to the first 12V load for power supply.

[0062] In this way, some low-power loads in the low-voltage load can continue to maintain the 12V system unchanged and be powered through the first 48V-12V DCDC.

[0063] See Figure 4 and Figure 8 , the first 12V load may include NFC (Near Field Communication), UBW (Unlimited Blade Work, a kind of driving assistance system), BNCM (vehicle Bluetooth and NFC communication module), 12V electrical box, window motor, Hall sensor, wake-up drive of various DCDCs, and so on.

[0064] In a possible implementation manner, see Figure 1 , the power supply system further includes a cockpit domain controller and an autonomous driving domain controller.

[0065] The cockpit domain controller is electrically connected to the first 48V-12V DCDC and at least one cockpit load among the multiple first 12V loads, and the autonomous driving domain controller is electrically connected to the first 48V-12V DCDC and at least one autonomous driving load among the multiple first 12V loads.

[0066] The first 48V-12V DCDC is used to supply power to the cockpit load through the cockpit domain controller and supply power to the autonomous driving load through the autonomous driving domain controller.

[0067] In implementation, the cockpit domain controller can reasonably distribute the 12V electrical energy delivered by the first 48V-12V DCDC to reasonably supply power to each cockpit load.

[0068] The autonomous driving domain controller can reasonably distribute the 12V electrical energy delivered by the first 48V-12V DCDC to reasonably supply power to each autonomous driving load.

[0069] In a possible implementation, the cockpit load may include a speaker and a display screen, and the autonomous driving load may include a radar and a camera. Of course, the cockpit load may also include devices provided in other cockpit domains, and the autonomous driving load may also include devices provided in other autonomous driving domains. The embodiments of the present disclosure do not make specific limitations thereto.

[0070] In a possible implementation, referring to Figure 1 , the power supply system further includes a regional controller, and the regional controller is electrically connected to the 48V distribution box and at least one third 48V load among a plurality of low-voltage loads.

[0071] The 48V distribution box is further used to supply power to the regional controller, and the regional controller is used to supply power to the third 48V load.

[0072] In implementation, referring to Figure 1 , the regional controller may include a left regional controller and a right regional controller. Both the left regional controller and the right regional controller are electrically connected to the 48V distribution box, and are respectively used to deliver the 48V electric energy delivered by the 48V distribution box to the third 48V load of each regional load, and supply power to it to make it work properly.

[0073] According to the requirements of the vehicle architecture, the controller designs and develops a dual-domain architecture (left regional controller and right regional control), which are respectively arranged on the left and right sides of the A-pillar of the cabin, and supply power to the third 48V load for driving and control nearby. The regional controller takes 48V electric energy from the 48V distribution box, outputs a 48V power supply, and drives the third 48V load (60W ≤ load power ≤ 300W).

[0074] In a possible implementation, a second 48V-12V DCDC is provided in the regional controller, and the second 48V-12V DCDC is electrically connected to at least one second 12V load among a plurality of low-voltage loads, and is used to supply power to the second 12V load.

[0075] In implementation, the regional controller is built-in with a second 48V-12V DCDC, and the second 48V-12V DCDC can convert the received 48V electric energy into 12V electric energy, so as to supply power to the second 12V load to make it work properly.

[0076] In a possible implementation, referring to Figure 4 and Figure 6 , the intelligent distribution box further includes a first PMIC (Power Management Integrated Circuit) and a first MCU (Microcontroller Unit).

[0077] In implementation, referring toFigure 4 , Figure 6 and Figure 7 , the intelligent distribution box can also receive a first control instruction, and based on the first control instruction, the first PMIC, and the first MCU, supply power to low-voltage loads such as motors corresponding to the first control instruction, thereby driving the low-voltage load to work to implement the first control instruction.

[0078] The first MCU can be electrically connected to the adjustment device of the vehicle for receiving the first control instruction sent by the adjustment device; the first PMIC is electrically connected to the first MCU, the first HV-48V DCDC, and the low-voltage load.

[0079] The first MCU can support any one of CAN bus communication, LIN communication, and Ethernet communication.

[0080] Among them, the adjustment device can be a device such as a display screen and operation buttons.

[0081] The user can operate the adjustment device on the vehicle to send a corresponding first control instruction to the first MCU. After receiving the first control instruction, the first MCU will, based on a first preset algorithm, determine the low-voltage load corresponding to the first control instruction and the power supply requirements for the low-voltage load to implement the first control instruction, and send them to the first PMIC. The first PMIC supplies power to the low-voltage load based on the power supply requirements of the low-voltage load to drive the low-voltage load to implement the first control instruction.

[0082] For example, the first control instruction is Figure 6 "Left front window Hall A input", "Left front window Hall B input", "Left front seat height adjustment HALL input", "Left front seat horizontal adjustment HALL input", "Left front seat backrest adjustment HALL input", "Left front seat height & horizontal adjustment input AI", "Left front seat cushion & backrest adjustment input AI", "Driver side switch - control left front window input AI", etc. shown in

[0083] See Figure 7 , to implement the above first control instruction, the first PMIC can supply power to the left front window motor to perform up and down adjustment of the window, supply power to the seat horizontal adjustment motor to perform front and back adjustment of the seat, supply power to the seat up and down adjustment motor to perform up and down adjustment of the seat, supply power to the seat backrest adjustment motor to perform front and back adjustment of the seat backrest, etc.

[0084] The first PMIC provides 48V power supply for the above-mentioned left front window motor, seat horizontal adjustment motor, seat up and down adjustment motor, seat backrest adjustment motor, etc., driving the motor to rotate, thereby implementing the user's control instruction.

[0085] Refer toFigure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , in the embodiments of the present disclosure, the intelligent distribution box transitions from traditional 12V fuses and relays to 48V E-FUSE (fuses) and drive chips, preventing the circuit from being damaged by overvoltage or overcurrent, and also preventing tampering, cracking, etc.

[0086] In addition, referring to Figure 4 , the intelligent distribution box adopts a dual-channel power input. One channel of power is a 48V battery input, and the other channel of power is a first HV-48V DCDC input, and isolation protection is carried out between these two channels of power through back-to-back MOS transistors.

[0087] During normal operation, according to requirements, by controlling the conduction or disconnection of the MOS transistor, one of the two channels of power is connected to the circuit to supply power to the intelligent distribution box.

[0088] When a fault (such as undervoltage, overvoltage, short circuit, overcurrent, etc.) occurs in one of the channels of power, the MOS transistor corresponding to the other channel of power is turned on, so that the other channel of power can be stably and reliably input.

[0089] In a possible implementation manner, referring to Figure 9 , the area controller may include a second PMIC and a second MCU.

[0090] In implementation, the second MCU can receive various second control instructions. After receiving the second control instructions, the second MCU will, based on a second preset algorithm, determine the low-voltage load corresponding to the second control instructions and the power supply requirements for the low-voltage load to implement the second control instructions, and send them to the second PMIC. The second PMIC distributes electric energy to the low-voltage load based on the power supply requirements of the low-voltage load to drive the low-voltage load to implement the second control instructions.

[0091] The second MCU can support any one of CAN bus communication, LIN communication, and Ethernet communication.

[0092] In a possible implementation manner, the area controller further includes a 48V power chip and a 12V power chip.

[0093] The 48V power chip is electrically connected to the second PMIC and a third 48V load. The second PMIC can transmit electric energy to the corresponding third 48V load through the 48V power chip to reasonably supply power to the third 48V load.

[0094] The 12V power chip is electrically connected to the second 48V-12V DCDC and the second 12V load. The second 48V-12V DCDC transmits electrical energy to the corresponding second 12V load through the 12V power chip to reasonably supply power to the second 12V load.

[0095] The 48V power chip may include HSD (High-Side Driver), LSD (Low-Side Driver), HB (Hybrid Bonding), E-FUSE, BLDC (Brushless Direct Current Motor) drive chip, and so on.

[0096] Similarly, the 12V power chip may also include HSD, LSD, HB, E-FUSE, BLDC drive chip, and so on.

[0097] Both the 48V power chip and the 12V power chip can realize the conversion, management, and efficient utilization of electrical energy through switching control and power amplification technologies. Their built-in switching elements can adjust the magnitude of current or voltage, realize the conversion between DC and AC, voltage rise and fall, etc. by controlling the conduction or cutoff of the switching element, optimize the electrical energy transmission efficiency, and reduce energy loss. Moreover, overvoltage, overcurrent, overheat protection circuits are also built in to ensure the safe operation of the device under abnormal conditions.

[0098] In a possible implementation, the 48V battery can be a 48V lithium battery.

[0099] In this way, using a 48V lithium battery instead of the 12V lead-acid battery in the related technology, from the uncontrollable lead-acid battery, the first step of lithium-ionization, the 48V lithium battery is more intelligent, smaller in size, thus reducing the weight, and has stable and controllable performance, improving the stability. It can be used in conjunction with μDCDC, and μDCDC can reduce the capacity of the 48V lithium battery.

[0100] The present disclosure also provides a vehicle, which includes the power supply system described in any one of the above.

[0101] The technical solutions provided by the present disclosure at least include the following beneficial effects:

[0102] The present disclosure provides a power supply system, which uses the first HV-48V DCDC, 48V battery, and intelligent distribution box to supply power to low-voltage loads, and is more likely to meet the load power requirements of the whole vehicle.

[0103] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A power supply system, characterized in that: The power supply system includes a high-voltage battery pack, a first HV-48VDCDC, a 48V battery, an intelligent distribution box and a plurality of low-voltage loads; The HV-48V DCDC is electrically connected to the high-voltage battery pack and the intelligent power distribution box, and the high-voltage battery pack is used to supply power to the intelligent power distribution box through the HV-48V DCDC; The 48V battery is electrically connected to the intelligent power distribution box, and the 48V battery is used to supply power to the intelligent power distribution box; The intelligent power distribution box is also electrically connected to the multiple low-voltage loads, and the intelligent power distribution box is used to supply power to the multiple low-voltage loads.

2. The power supply system according to claim 1, characterized in that: A second HV-48V DCDC is disposed in the high-voltage battery pack, the second HV-48V DCDC is electrically connected to the 48V battery, and the second HV-48V DCDC is used to charge the 48V battery.

3. The power supply system according to claim 1, characterized in that: A μDCDC is provided in the high-voltage battery pack, and the μDCDC is electrically connected to at least one of the multiple low-voltage loads. The μDCDC is used to provide 48V normal power to the at least one low-voltage load when the vehicle is powered off.

4. The power supply system according to claim 1, characterized in that: The intelligent power distribution box includes a 48V power distribution box, a thermal management controller and a first 48V-12V DCDC; The 48V power distribution box, the thermal management controller, and the first 48V-12V DCDC are all electrically connected to the first HV-48VDCDC; The 48V power distribution box is electrically connected to at least one first 48V load among the multiple low-voltage loads, and is used to perform primary power distribution for the first 48V load; The thermal management controller is electrically connected to at least one second 48V load among the plurality of low-voltage loads, and is used to supply power to the second 48V load; The first 48V-12V DCDC is electrically connected to at least one first 12V load among the multiple low-voltage loads, and is used to supply power to the first 12V load.

5. The power supply system according to claim 4, characterized in that: The power supply system further includes a regional controller, wherein the regional controller is electrically connected to the 48V distribution box and at least one third 48V load among the plurality of low-voltage loads; The 48V distribution box is also used to supply power to the zone controller, and the zone controller is used to supply power to the third 48V load.

6. The power supply system according to claim 5, characterized in that: A second 48V-12V DCDC is disposed in the regional controller, and the second 48V-12V DCDC is electrically connected to at least one second 12V load among the multiple low-voltage loads, and is used to supply power to the second 12V load.

7. The power supply system according to claim 4, characterized in that: The power supply system also includes a cockpit domain controller and an autonomous driving domain controller; The cockpit domain controller is electrically connected to the first 48V-12V DCDC and at least one cockpit load among the plurality of first 12V loads, and the autonomous driving domain controller is electrically connected to the first 48V-12V DCDC and at least one autonomous driving load among the plurality of first 12V loads; The first 48V-12V DCDC is used to power the cabin load through the cabin domain controller, and to power the autonomous driving load through the autonomous driving domain controller.

8. The power supply system according to claim 7, characterized in that: The cockpit load includes a speaker and a display screen, and the automatic driving load includes a radar and a camera.

9. The power supply system according to claim 1, characterized in that: The first 48V load includes a brake-by-wire system and a steer-by-wire system, and the second 48V load includes a cooling fan, a blower and a cooling water pump.

10. A vehicle, characterized in that: The vehicle comprises a power supply system according to any one of claims 1 to 9.

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