A platform power distribution unit for a vehicle battery system

Abstract

The utility model relates to battery system technical field discloses a kind of platformization power distribution unit for vehicle battery system, including box, four side surfaces are respectively first side and third side of oppositely arranged, second side and fourth side of oppositely arranged;Box outside is equipped with the installation site of mounting connector group;Box inside is equipped with the installation site of installing electrical device group, including: the battery management system BMS installation site of being arranged at the fourth side corresponding box wall, and along four side surface corresponding box wall and box bottom installation site;According to full-function architecture or derivative new architecture, corresponding connector group and electrical device group are selected, installed on respective installation site, and connected to form corresponding loop, obtain corresponding power distribution unit.The scheme constructs box fixed and device position fixed as foundation, specific configuration flexible iteration platformization PDU, can be derived multiple architectures without changing box structure, only by reducing device, adjusting copper cable bundle can be quickly obtained required PDU.

Description

Technical Field

[0001] This utility model relates to the field of battery system technology, and specifically to a platform-based power distribution unit for a vehicle battery system. Background Technology

[0002] Currently, the electrical architecture of power distribution units (PDUs) for vehicle battery systems generally adopts a customized design approach. This means that a dedicated PDU solution is developed specifically for different vehicle models based on parameters such as voltage level, current requirements, functional configuration, and installation space. This approach has become a relatively mature technical path in practice, typically including core components such as high-voltage input / output interfaces, main contactors, pre-charge circuits, fuses, current sampling units, insulation monitoring modules, and communication control units. It can meet the safety, power density, and functional integrity requirements of specific vehicle models.

[0003] The advantage of existing customized designs lies in their ability to accurately match the requirements of the vehicle's electrical system, optimize component selection and layout, and improve system integration and reliability. They are especially suitable for high-power, high-safety-level applications such as heavy trucks and buses.

[0004] However, this approach also has significant drawbacks: long development cycles, requiring repeated circuit design, safety verification, and EMC testing, leading to high R&D costs; rigid hardware architecture, making cross-platform reuse difficult, resulting in a wide variety of PDU components across different vehicle models, increasing the complexity of production, inventory, and maintenance; and slow response to rapidly evolving market demands, hindering rapid product deployment and technology upgrades, thus restricting the standardization and large-scale development of battery systems. Utility Model Content

[0005] The present invention aims to provide a platform-based power distribution unit for vehicle battery systems to solve the technical problem that existing power distribution units with customized designs cannot quickly respond to the needs of vehicle technology iteration.

[0006] The basic solution provided by this utility model is: a platform-based power distribution unit for a vehicle battery system, including a housing, the four sides of which are respectively a first side and a third side arranged opposite to each other, and a second side and a fourth side arranged opposite to each other. The exterior of the enclosure is equipped with mounting positions for connector assemblies, including: At least two battery negative connector mounting positions, at least two battery heating connector mounting positions, and at least two battery positive connector mounting positions are sequentially provided on the first side of the outer exterior of the housing. At least two manual service disconnect device mounting positions, a test connector mounting position, at least two fast charging positive connector mounting positions, a communication connector group mounting position, and a high voltage output connector group mounting position are sequentially provided on the second side of the outer exterior of the enclosure. At least two positive discharge connector mounting positions, at least two negative discharge connector mounting positions, and at least two fast charging negative connector mounting positions are sequentially provided on the third side of the outer exterior of the housing. The enclosure has mounting positions for electrical component assemblies, including: A battery management system (BMS) mounting position is provided on the fourth side corresponding to the box wall, and mounting positions are provided along the four sides corresponding to the box walls and the box bottom for installing wiring harness groups, copper busbar groups, relay groups, fuse groups, current sensor groups and pre-charge resistors; wherein, the mounting positions for the current sensor groups and pre-charge resistors are close to the first side corresponding to the box wall. Based on the full-function architecture or a derived new architecture, select the corresponding connector group and electrical component group, install them in their respective mounting positions, and connect them to form the corresponding circuit to obtain the corresponding power distribution unit.

[0007] The working principle and advantages of this utility model are as follows: By installing corresponding connectors and devices at the designed mounting positions and connecting them according to the full-function architecture to form corresponding circuits, a PDU with a full-function architecture is obtained. This is particularly suitable for 180kWh to 400kWh battery systems in the current heavy-duty truck market, which typically consist of two sets of batteries connected in parallel, dual-gun charging and dual-branch discharging, two battery heating outputs, one water-cooled high-voltage output, and one DC-DC high-voltage output. Based on the PDU formed by the full-function architecture, without changing the cabinet structure, different new architectures can be derived by simply reducing the number of components, adjusting the copper busbar routing, and optimizing the acquisition harness to adapt to battery systems in different scenarios.

[0008] Compared with existing technologies, this solution, by studying the PDU architecture characteristics required for various vehicle models and combining various architecture building ideas in conventional customized design, breaks through the limitations of single device structure in customized design. It constructs a platform-based PDU with fixed enclosure and fixed device positions as the foundation, and flexible iteration of specific configurations. Without changing the enclosure structure, multiple architectures can be derived by simply reducing the number of devices, adjusting the copper busbar routing, and optimizing the acquisition harness. It has the capability of multi-architecture derivation, which can adapt to the ever-changing application requirements of vehicle battery systems with high safety, low cost, and rapid adaptation. It improves the diversity and versatility of power distribution units and optimizes the development cost and cycle across configurations. Attached Figure Description

[0009] Figure 1 A schematic diagram of the structure of a platform-based power distribution unit for a vehicle battery system provided in this embodiment of the present invention. Figure 1 ; Figure 2 A schematic diagram of the structure of a platform-based power distribution unit for a vehicle battery system provided in this embodiment of the present invention. Figure 2 ; Figure 3A schematic diagram of the structure of a platform-based power distribution unit for a vehicle battery system provided in this embodiment of the present invention. Figure 3 ; Figure 4 A schematic diagram of the structure of a platform-based power distribution unit for a vehicle battery system provided in this embodiment of the present invention. Figure 4 ; Figure 5 A schematic diagram of the internal component layout of a platform-based power distribution unit for a vehicle battery system provided in an embodiment of this utility model; Figure 6 This is a schematic diagram illustrating the full-function architecture of a platform-based power distribution unit for a vehicle battery system, provided as an embodiment of the present invention.

[0010] The markings in the accompanying drawings include: housing 1, first side 11, second side 12, third side 13, fourth side 14, top cover 15, connector group 2, battery negative connector 21, battery heating connector 22, battery positive connector 23, manual service disconnect device 24, debugging connector 25, fast charging positive connector 26, communication connector group 27, high voltage output connection group 28, discharge positive connector 29, discharge negative connector 210, fast charging negative connector 211, electrical component group 3, battery management system 31, wiring harness group 32, copper busbar group 33, relay group 34, fuse group 35, current sensor group 36, and pre-charge resistor 37. Detailed Implementation

[0011] The following detailed explanation illustrates the specific implementation methods: The basic implementation examples are as follows: Figure 1 As shown: A platform-based power distribution unit for a vehicle battery system includes a housing 1. The exterior of the housing 1 has mounting positions for a connector assembly 2, which is installed according to the architecture design. The interior of the housing 1 has mounting positions for an electrical component assembly 3, which is installed according to the architecture design. The electrical component assembly 3 includes a power management system 31, a wiring harness assembly 32, a copper busbar assembly 33, a relay assembly 34, a fuse assembly 35, a current sensor assembly 36, and a pre-charge resistor 37, which are connected to form a corresponding circuit to obtain the power distribution unit.

[0012] Specifically, the housing 1 is made of 1.5-2.0mm thick Q235 steel plate, the mounting brackets are 3-5mm thick, preferably 4mm, the strength meets the vibration requirements of "GB 38031-2020 Safety Requirements for Power Batteries for Electric Vehicles", the protection performance meets IP68, and the exterior is treated with electrophoresis + powder coating, which can meet the 720h protection performance of heavy trucks in complex environments. The housing includes the top cover 15.

[0013] The four sides of the enclosure are respectively the first side 11 and the third side 13, and the second side 12 and the fourth side 14, which are arranged opposite to each other. The exterior of the enclosure 1 is provided with mounting positions for the connector assembly 2, including: like Figure 2 As shown, at least two (two in this embodiment) battery negative connector 21 mounting positions, at least two (two in this embodiment) battery heating connector 22 mounting positions and at least two (two in this embodiment) battery positive connector 23 mounting positions are sequentially provided on the first side 11 outside the housing 1; the two battery heating connector 22 mounting positions are arranged vertically, and the rest are arranged horizontally.

[0014] like Figure 3 As shown, at least two (two in this embodiment) manual service disconnect device 24 mounting positions, debugging connector 25 mounting positions, at least two (two in this embodiment) fast charging positive connector 26 mounting positions, communication connector group 27 mounting positions, and high voltage output connector group 2 mounting positions are sequentially arranged on the second side 12 outside the housing 1. In this embodiment, the communication connector group 27 includes a vehicle communication connector, an internal communication connector, and a DC-DC communication connector, and its mounting positions are arranged vertically. The high voltage output connector group 2 includes a DC-DC high voltage connector and a water-cooled high voltage connector, and its mounting positions are arranged vertically, with the rest arranged horizontally.

[0015] like Figure 4 As shown, at least two (two in this embodiment) positive discharge connector 29 mounting positions, at least two (two in this embodiment) negative discharge connector 210 mounting positions, and at least two (two in this embodiment) fast charging negative connector 211 mounting positions are sequentially provided on the third side 13 outside the housing 1.

[0016] In the above-mentioned external design, considering the routing characteristics and assembly of single-branch and dual-branch circuits, the connectors and MSDs are placed in different positions to cooperate with the subsequent internal component layout. This ensures that whether it is a full-function architecture or a derivative architecture, the routing of components can still be reasonable under the condition of component adjustment and change, so as to achieve the best routing effect in multiple scenarios.

[0017] like Figure 5 As shown, the interior of the housing 1 has mounting positions for the electrical component assembly 3, including: The battery management system (BMS) 31 is installed at the corresponding box wall on the fourth side 14, and the wiring harness group 32, copper busbar group 33, relay group 34, fuse group 35, current sensor group 36 and pre-charge resistor 37 are installed along the four sides corresponding to the box walls and the box bottom; wherein the installation positions of the current sensor group 36 and the pre-charge resistor 37 are close to the corresponding box wall on the first side 11.

[0018] Based on the full-function architecture or a derived new architecture, select the corresponding connector group 2 and electrical component group 3, install them in their respective mounting positions, and connect them to form the corresponding circuit to obtain the corresponding power distribution unit.

[0019] In this embodiment, the full-featured architecture is as follows: Figure 6 As shown in Table 1.

[0020] Table 1. Statistics on the Combination of Full-Function Architecture and Derivative Architecture Devices

[0021] exist Figure 2 In the full-function architecture: the two battery positive connectors 23 are connected to the main positive relay K1 through two manual service disconnect devices 24 (MSD1, MSD2) and two main circuit fuses (F1, F2). The main positive relay K1 is connected to the two fast charging positive connectors 26 through fast charging positive relay 1 K3 and fast charging positive relay 2 K4. The main positive relay K1 is connected to the two discharge positive connectors 29 through a discharge positive relay K2. The high-voltage output connector group 2 includes a water-cooled high-voltage connector and a DC-DC high-voltage connector. The main positive relay K1 is connected to the positive terminals of the water-cooled high-voltage connector and the DC-DC high-voltage connector through water-cooled high-voltage relay K6 and water-cooled high-voltage fuse F5, DC-DC high-voltage relay K12 and DC-DC high-voltage fuse F6, thus forming the main circuit.

[0022] The two battery negative connectors 21 are connected to the main negative relay K8 through two current sensors H1 and H2 respectively. The main negative relay K8 is connected to the two discharge negative connectors 210 through the discharge negative relay K9. The main negative relay K8 is connected to the two fast charging negative connectors 211 through the fast charging negative one relay K10 and the fast charging negative two relay K11 respectively. The main negative relay K10 is directly connected to the negative terminal of the water-cooled high-voltage connector and the negative terminal of the DC-DC high-voltage connector, thus forming a negative terminal detection and control circuit.

[0023] The positive terminals of the two battery heating connectors 22 are connected to the heating relay K5 through the heating circuit one fuse F3 and the heating circuit two fuse F4 respectively. The output terminal of the heating relay K5 is connected to the output terminal of the main positive relay K1. The negative terminals of at least two battery heating connectors 22 are directly connected to the output terminal of the main negative relay K8, thus forming a heating circuit.

[0024] The battery management system 31BMS is integrated into the designed battery distribution unit, and each circuit relay, current sensor and communication connector group 27 are connected to form a communication control circuit to independently control the relays of each circuit and collect the current data of the negative terminal detection control circuit. Data interaction is performed with the vehicle system through the communication connector group 27.

[0025] A precharge resistor is connected in series with a precharge relay to form a precharge circuit, and the precharge circuit is connected in parallel with the main positive relay of the main circuit.

[0026] According to Table 1, in Figure 6 Based on the full-function architecture, by reducing the number of components accordingly, adopting direct connection or canceling connection methods, adjusting the precharge circuit or canceling the precharge circuit, different architectures can be formed; in other embodiments, components can be reduced to form other forms of architecture according to actual needs.

[0027] Therefore, in order to achieve optimal routing adjustments and layout from the full-function architecture to the derived new architecture, the positions of each component inside chassis 1 are designed as follows, such as... Figure 5 As shown: Main circuit device mounting positions: Fuse group 35 includes at least two main circuit fuses (F1, F2), whose mounting positions are close to the corresponding enclosure wall on the second side 12, and correspond to at least two manual service disconnect device 24 mounting positions; Relay group 34 includes a main positive relay K1, whose mounting position is close to the center of the bottom of the enclosure; Relay group 34 includes at least two fast charging positive relays (K3, K4), whose mounting positions are close to the corresponding enclosure wall on the second side 12, and correspond to at least two fast charging positive connector 26 mounting positions; Relay group 34 includes a discharge positive relay K2, whose mounting position is close to the corresponding enclosure wall on the third side 13, and corresponds to at least two fast charging positive connector 26 mounting positions; Relay The device group 34 includes a water-cooled high-voltage relay K6, whose mounting position is located between the mounting position of the main positive relay K1 and the corresponding enclosure wall 13 on the third side; the relay group 34 includes a DC-DC high-voltage relay K12, whose mounting position is close to the corresponding enclosure wall on the third side 13 and corresponds to at least two fast-charging negative connector 211 mounting positions; the fuse group 35 includes a water-cooled high-voltage fuse F5, whose mounting position is located between the mounting position of the water-cooled high-voltage relay K6 and the corresponding enclosure wall on the third side 13; the fuse group 35 includes a DC-DC high-voltage fuse F6, whose mounting position is located between the corresponding enclosure wall on the third side 13 and the mounting positions of the DC-DC high-voltage relay K12 and the water-cooled high-voltage fuse F5.

[0028] Negative terminal detection control circuit device mounting positions: The current sensor group (H1, H2) is mounted near the first side 11 corresponding to the box wall and corresponds to at least two battery negative connector 21 mounting positions; the relay group 34 includes a total negative relay K8, whose mounting position is near the fourth side 14 corresponding to the box wall and near the center of the box bottom; the relay group 34 includes at least two fast charging negative relays (K10, K11), whose mounting positions are near the third side 13 corresponding to the box wall and correspond to at least two fast charging negative connector 211 mounting positions; the relay group 34 includes a discharge negative relay K9, whose mounting position is near the fourth side 14 corresponding to the box wall and is located between the total negative relay K8 and the at least two fast charging negative relays (K10, K11) mounting positions.

[0029] Heating circuit device mounting positions: Fuse group 35 includes at least two heating circuit fuses (F3, F4), whose mounting positions are close to the third side 13 corresponding to the box wall, and corresponding to at least two discharge negative connector 210 mounting positions; Relay group 34 includes heating relay K5, whose mounting positions are close to at least two heating circuit fuses (F3, F4), and close to the center of the bottom of the box.

[0030] Precharge circuit device mounting positions: The precharge resistor Y1 mounting position is located between the current sensor group mounting positions (H1, H2) and at least two battery negative connector 21 mounting positions; the relay group 34 includes a precharge relay K7, whose mounting position is close to the current sensor group mounting positions (H1, H2) and the precharge resistor Y1 mounting position, and corresponds to at least two battery heating connector 22 mounting positions.

[0031] For the selection of components in the battery system of current heavy-duty truck models, please refer to the following: Relay selection strategy: In the current mainstream configuration of heavy trucks (considering electrical safety requirements, the system voltage is 618Vdc), the circuit current is 346A~600A. Therefore, relays with rated current of 400A, 500A, and 600A are selected as the main circuit relays (total positive relay and total negative relay), and relays with rated current of 40A are selected as the relays for other circuits (heating circuit, TMS water-cooled high-voltage power supply, DC-DC power supply, and pre-charge circuit relay).

[0032] Fuse selection strategy: To ensure circuit safety, fuses should be selected to effectively protect the circuit load and relays in the event of a short circuit. The voltage rating should be 750Vdc or higher. The fuse specification is usually 1.3 to 1.5 times that of the circuit relay specification. That is, the rated current of the fuse should be selected to be 1.3 to 1.5 times that of the rated current of the same circuit relay.

[0033] MSD uses a device with HVIL high-voltage interlock detection circuit. HVIL is connected to BMS. When BMS detects that the circuit is broken, BMS can send a signal to disconnect the relay and reduce the high voltage of the system to avoid the risk of electric shock to personnel and ensure the safety of maintenance operations. Current sensor selection strategy: Considering voltage sampling accuracy and BMS electrical isolation, a closed-loop Hall sensor with CAN communication is adopted, with a range covering the system peak current, a specification of 700A, and an accuracy of 0.2%; For the selection of the pre-charging resistor, a 150W, 50Ω alloy pre-charging resistor is chosen, which can cover most of the pre-charging power requirements of current heavy-duty truck models. At the same time, the pre-charging circuit can be placed on the positive or negative terminal according to customer needs, which has good electrical architecture flexibility.

[0034] Connector selection strategy: Since 180kWh to 400kWh battery systems require 35mm connectors respectively. 2 50mm 2 75mm 2 , 95mm 2 Four types of power harnesses are used, therefore the main circuit connector is selected to be compatible with 35mm. 2 ~95mm 2 High-voltage connectors for high-voltage shielded cables; 2.5mm connectors are used for battery heating output, TMS water-cooled unit power supply, and DC-DC high-voltage output. 2 6mm 2 2.5mm 2 High-voltage connectors, communication connector assemblies, and test connectors use 12-pin and 32-pin connectors with a diameter of 0.35–0.75 mm. 2 Low-voltage connector.

[0035] The platform-based power distribution unit for a vehicle battery system provided in this embodiment has the following advantages compared with the prior art: 1) The unified enclosure structure requires only one set of molds to be developed, eliminating the need for repeated design of enclosure molds and avoiding the need for separate molds for each configuration. This is especially beneficial for scenarios such as heavy trucks with large enclosure sizes (which need to support high-voltage / high-current devices), significantly reducing the development costs for adapting to multiple scenarios and resulting in significant savings in mold costs. At the same time, the high degree of standardization of parts makes inventory management simpler (no need to stock spare parts for different enclosures). 2) From a full-function architecture to a new architecture, since the adjustment method does not affect the overall security, after the full-function architecture is verified once, the derived architecture does not need to repeat the verification of the enclosure's protection (IP rating), mechanical strength (vibration and shock resistance), heat dissipation capacity, etc., and can skip the enclosure verification stage, reducing the number of tests and R&D investment, and shortening the development cycle of the new architecture.

[0036] 3) The platform-based PDU design enhances adaptability to diverse vehicle configurations (such as different power types and functional requirements), and can be applied to battery systems ranging from 180kWh to 400kWh for heavy-duty trucks. Furthermore, heavy-duty trucks have a long lifespan (typically 8-10 years) and may face upgrade needs during use (such as adding auxiliary electrical equipment or modifying the power system). The modular internal design of the platform-based PDU (components, copper busbars, and wiring harnesses can be flexibly adjusted) provides strong scalability. Additionally, maintenance personnel are more familiar with the internal layout, and spare parts have high commonality (such as housing screws and mounting brackets), reducing after-sales training costs and maintenance time.

[0037] 4) By rationally arranging the internal mounting positions of the enclosure, electrical components are arranged along the walls and bottom of the enclosure with reserved space in between, providing ample operating space for component replacement and maintenance. This facilitates tool access and module assembly / disassembly, reduces interference between adjacent components, improves maintenance efficiency, and enhances system maintainability and operational reliability. Simultaneously, it improves heat dissipation performance, forming a natural convection channel and reducing localized temperature rise. Furthermore, the design of the pre-charge resistor's position allows for easy adjustment of the pre-charge circuit connection simply by adjusting the wiring harness, fully demonstrating the advantages of a platform-based PDU and short cross-configuration development cycle.

[0038] 5) The integrated Battery Management System (BMS) provides the power battery system with functions such as voltage acquisition, insulation analysis, relay adhesion detection, battery cell voltage acquisition, battery system temperature acquisition, system current acquisition, system fault diagnosis, and system debugging. By connecting each relay to the BMS, the PDU can provide power distribution to the power battery system while automatically controlling circuit on / off. Furthermore, due to the integration of the BMS and its specially designed layout, the entire battery system is more compact in terms of space utilization, fitting the limited vehicle space of electric heavy-duty trucks. In terms of wiring, the structure of this invention simplifies the wiring between the BMS and the electrical component assembly, shortens the wiring length, reduces wiring complexity, and reduces the risk of line faults. In terms of safety, it can better protect the BMS from the effects of harsh external environments, improving the stability and reliability of the entire battery management system.

[0039] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A platform-based power distribution unit for a vehicle battery system, characterized in that, The enclosure includes a first side and a third side, and a second side and a fourth side, which are arranged opposite to each other. The exterior of the enclosure is equipped with mounting positions for connector assemblies, including: At least two battery negative connector mounting positions, at least two battery heating connector mounting positions, and at least two battery positive connector mounting positions are sequentially provided on the first side of the outer exterior of the housing. At least two manual service disconnect device mounting positions, a test connector mounting position, at least two fast charging positive connector mounting positions, a communication connector group mounting position, and a high voltage output connector group mounting position are sequentially provided on the second side of the outer exterior of the enclosure. At least two positive discharge connector mounting positions, at least two negative discharge connector mounting positions, and at least two fast charging negative connector mounting positions are sequentially provided on the third side of the outer exterior of the housing. The enclosure has mounting positions for electrical component assemblies, including: A battery management system (BMS) mounting position is provided on the fourth side corresponding to the box wall, and mounting positions are provided along the four sides corresponding to the box walls and the box bottom for installing wiring harness groups, copper busbar groups, relay groups, fuse groups, current sensor groups and pre-charge resistors; wherein, the mounting positions for the current sensor groups and pre-charge resistors are close to the first side corresponding to the box wall. Based on the full-function architecture or a derived new architecture, select the corresponding connector group and electrical component group, install them in their respective mounting positions, and connect them to form the corresponding circuit to obtain the corresponding power distribution unit.

2. The platform-based power distribution unit for a vehicle battery system according to claim 1, characterized in that, The communication connector group includes vehicle communication connectors, internal communication connectors, and DC-DC communication connectors.

3. The platform-based power distribution unit for a vehicle battery system according to claim 1, characterized in that, The high-voltage output connector group includes DC-DC high-voltage connectors and water-cooled high-voltage connectors.

4. A platform-based power distribution unit for a vehicle battery system according to claim 1, characterized in that, At least two battery heating connector mounting positions, communication connector group mounting positions, and high voltage output connector group mounting positions are arranged vertically.

5. A platform-based power distribution unit for a vehicle battery system according to claim 1, characterized in that, The enclosure is made of 1.5-2.0mm thick Q235 steel plate; the bottom of the enclosure is equipped with mounting brackets with a thickness of 3-5mm. The strength meets the vibration requirements of "GB 38031-2020 Safety Requirements for Power Batteries for Electric Vehicles", the protection performance meets IP68, and the exterior is treated with electrophoresis and powder coating processes to meet the 720h protection performance requirements of heavy trucks in complex environments.

6. A platform-based power distribution unit for a vehicle battery system according to claim 1, characterized in that, The fuse group includes at least two main circuit fuses, whose mounting positions are close to the second side corresponding to the enclosure wall, and corresponding to at least two manual service disconnect device mounting positions; the relay group includes a main positive relay, whose mounting position is close to the center of the bottom of the enclosure; the relay group includes at least two fast charging positive relays, whose mounting positions are close to the second side corresponding to the enclosure wall, and corresponding to at least two fast charging positive connector mounting positions; the relay group includes a discharge positive relay, whose mounting position is close to the third side corresponding to the enclosure wall, and corresponding to at least two fast charging positive connector mounting positions; the relay group includes a water-cooled high-voltage relay, whose mounting position is located between the main positive relay mounting position and the third side corresponding to the enclosure wall; the relay group includes a DC-DC high-voltage relay, whose mounting position is close to the third side corresponding to the enclosure wall, and corresponding to at least two fast charging negative connector mounting positions; the fuse group includes a water-cooled high-voltage fuse, whose mounting position is located between the water-cooled high-voltage relay mounting position and the third side corresponding to the enclosure wall; the fuse group includes a DC-DC high-voltage fuse, whose mounting position is located between the third side corresponding to the enclosure wall and the DC-DC high-voltage relay and water-cooled high-voltage fuse mounting positions.

7. A platform-based power distribution unit for a vehicle battery system according to claim 1, characterized in that, The current sensor group is mounted near the first side wall corresponding to the enclosure wall and corresponds to at least two battery negative connector mounting positions; the relay group includes a main negative relay, whose mounting position is near the fourth side wall corresponding to the enclosure wall and near the center of the bottom of the enclosure; the relay group includes at least two fast charging negative relays, whose mounting positions are near the third side wall corresponding to the enclosure wall and correspond to at least two fast charging negative connector mounting positions; the relay group includes a discharge negative relay, whose mounting position is near the fourth side wall corresponding to the enclosure wall and is located between the main negative relay and the at least two fast charging negative relay mounting positions.

8. A platform-based power distribution unit for a vehicle battery system according to claim 1, characterized in that, The fuse group includes at least two heating circuit fuses, which are mounted near the third side corresponding to the enclosure wall and at least two discharge negative connector mounting positions; the relay group includes a heating relay, which is mounted near at least two heating circuit fuses and near the center of the bottom of the enclosure.

9. A platform-based power distribution unit for a vehicle battery system according to claim 1, characterized in that, The pre-charge resistor mounting position is located between the current sensor group mounting position and at least two battery negative connector mounting positions; the relay group includes a pre-charge relay, whose mounting position is close to the current sensor group mounting position and the pre-charge resistor mounting position, and corresponds to at least two battery heating connector mounting positions.

10. A vehicle, characterized in that, The system is equipped with a platform-based power distribution unit for a vehicle battery system as described in any one of claims 1-9.

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