Power battery high-voltage box device

Abstract

The invention belongs to the technical field of automobile engineering, and discloses a power battery high-voltage box device which comprises a high-voltage wire body, a power battery high-voltage wiring port, a high-voltage output interface and a charging socket. The power battery high-voltage wiring port, the high-voltage output interface and the charging socket are fixedly embedded in the outer side wall of the high-voltage line body, and the power battery high-voltage wiring port is electrically connected with a power input port of the high-voltage power distribution module through a first copper bar assembly. The high-voltage output interface is electrically connected with a high-voltage output port of the high-voltage power distribution module through a first copper bar assembly, the charging socket is electrically connected with a charging port of the high-voltage power distribution module through a second copper bar assembly, and the high-voltage output interface is electrically connected with the high-voltage output port of the high-voltage power distribution module through a third copper bar assembly. The number of parts and external connecting parts is reduced, and the manufacturing cost of the whole vehicle and the weight of the device are reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive engineering technology, and in particular to a high-voltage box device for power batteries. Background Technology

[0002] In the development of new energy vehicles for heavy-duty trucks, the high-voltage box for the power battery is a core component ensuring the safe and stable operation of the vehicle's high-voltage system. It primarily functions as a high-voltage power distribution unit for the power battery, providing charging connections and circuit protection. Currently, most existing high-voltage box devices for heavy-duty trucks adopt a separate structure for the high-voltage box and charging socket, meaning they are independently installed and connected via high-voltage wiring harnesses, wiring harness connectors, and copper plates.

[0003] This split-type layout scheme has the following technical defects: First, a large number of high-voltage connection harnesses, connectors and other accessories need to be equipped, which not only increases the BOM cost of the whole vehicle, but also increases the number of parts, directly increasing the weight of the whole vehicle, which is not conducive to the energy consumption control of heavy trucks. Second, high-voltage current needs to be transmitted through a long wire harness. The long current transmission path results in greater energy loss during charging and lower charging efficiency. Third, the installation of the charging socket in the split structure requires a separate installation box, and there are many wiring harness connection nodes, which poses a risk of excessive contact resistance, limiting the overcurrent capacity of the charging socket and affecting the improvement of charging power. Fourth, the split layout requires separate installation and positioning of the high-voltage box and charging socket, which is complicated. Furthermore, vibrations during vehicle operation can easily cause the wiring harness connectors to loosen, affecting the operational stability of the high-voltage system.

[0004] Therefore, we propose a high-voltage box device for power batteries. Summary of the Invention

[0005] The purpose of this invention is to provide a high-voltage box device for power batteries, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include: A high-voltage box device for a power battery includes a high-voltage line body, a high-voltage terminal block for the power battery, a high-voltage output interface, and a charging socket. A high-voltage power distribution module is fixedly installed inside the high-voltage line body. The high-voltage terminal block, the high-voltage output interface, and the charging socket are all fixedly embedded on the outer wall of the high-voltage line body. The high-voltage terminal block is electrically connected to the power input port of the high-voltage power distribution module through a first copper busbar assembly. The high-voltage output interface is electrically connected to the high-voltage output port of the high-voltage power distribution module through a second copper busbar assembly. The charging socket is electrically connected to the charging port of the high-voltage power distribution module through a third copper busbar assembly.

[0007] In a power battery high-voltage box device according to the present invention, three sets of high-voltage terminals for the power battery are provided.

[0008] In a power battery high-voltage box device according to the present invention, the positive and negative interfaces of the power battery high-voltage terminal are respectively disposed on opposite sides of the high-voltage line body. The positive interface of the power battery high-voltage terminal is electrically connected to the positive interface of the power input port of the high-voltage power distribution module through the positive copper busbar in the first copper busbar assembly, and the negative interface of the power battery high-voltage terminal is electrically connected to the negative interface of the power input port of the high-voltage power distribution module through the negative copper busbar in the first copper busbar assembly.

[0009] In a power battery high-voltage box device according to the present invention, two sets of high-voltage output interfaces are provided.

[0010] In a power battery high-voltage box device according to the present invention, the positive and negative interfaces of the two sets of high-voltage output interfaces are both arranged on the same side of the high-voltage line body. The positive interface of the high-voltage output interface is electrically connected to the positive interface of the high-voltage output port of the high-voltage power distribution module through the positive copper busbar in the second copper busbar assembly, and the negative interface of the high-voltage output interface is electrically connected to the negative interface of the high-voltage output port of the high-voltage power distribution module through the negative copper busbar in the second copper busbar assembly.

[0011] In a power battery high-voltage box device according to the present invention, the charging socket is provided in two sets. The positive terminal of the charging socket is electrically connected to the positive terminal of the charging port of the high-voltage power distribution module through the positive terminal copper busbar in the third copper busbar assembly, and the negative terminal of the charging socket is electrically connected to the negative terminal of the charging port of the high-voltage power distribution module through the negative terminal copper busbar in the third copper busbar assembly.

[0012] In a power battery high-voltage box device according to the present invention, the high-voltage output interface and the charging socket are located on the same side of the high-voltage line body, and are not on the same side as the power battery high-voltage connection port.

[0013] In a power battery high-voltage box device according to the present invention, a low-voltage communication interface is fixedly embedded on the high-voltage line body, a control module is installed inside the high-voltage line body, the low-voltage communication interface is electrically connected to the model output terminal of the control module, and the model input terminal of the control module is electrically connected to the signal output terminal of the high-voltage power distribution module.

[0014] In a power battery high-voltage box device according to the present invention, mounting bases are fixedly connected to both opposite sides of the lower end of the high-voltage line body.

[0015] In a power battery high-voltage box device according to the present invention, the bottom of each mounting base is fixedly provided with a vibration isolation pad.

[0016] This invention has at least the following beneficial effects: The integrated structural design integrates multiple interfaces, high-voltage power distribution modules, and control modules into the high-voltage line body, reducing the number of parts and external connection components, thereby lowering the overall vehicle manufacturing cost and the weight of the device itself.

[0017] The design of multiple sets of high-voltage wiring ports, high-voltage output interfaces and charging sockets for power batteries is adapted to the needs of multiple power supply circuits, multiple device power consumption and different charging scenarios, thereby improving the versatility and adaptability of the device.

[0018] The separate arrangement of positive and negative interfaces and the independent conductive circuit design of the copper busbar avoid short circuit risks and electromagnetic interference, ensuring the safety and standardization of power transmission.

[0019] The mounting base works in conjunction with the vibration damping pad to effectively buffer vehicle vibrations, protect internal electrical components and connection structures, extend the service life of the device, and improve operational reliability.

[0020] The control module works in conjunction with the low-voltage communication interface and the high-voltage power distribution module to achieve real-time monitoring and precise control of the high-voltage system's operating status, thereby enhancing the safety of the high-voltage system's operation.

[0021] The interfaces are centrally located on both sides, which facilitates vehicle assembly and subsequent maintenance, and reduces the difficulty of wiring harness layout and troubleshooting time. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This is a schematic diagram of the rear view structure of this utility model; Figure 4 This is a circuit block diagram of the present invention.

[0023] Explanation of icon numbers: 1. High-voltage line body; 101. Mounting base; 2. High-voltage connection port of power battery; 3. High-voltage output interface; 4. Charging socket; 5. Low-voltage communication interface; 6. High-voltage power distribution module; 7. Control module. Detailed Implementation

[0024] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0025] Please refer to Figures 1 to 4 As shown, an embodiment of the present invention provides a high-voltage box device for a power battery, characterized in that it includes a high-voltage line body 1, a high-voltage connection port 2 for the power battery, a high-voltage output interface 3, and a charging socket 4. A high-voltage power distribution module 6 is fixedly installed inside the high-voltage line body 1. The high-voltage connection port 2, the high-voltage output interface 3, and the charging socket 4 are all fixedly embedded on the outer wall of the high-voltage line body 1. The high-voltage connection port 2 is electrically connected to the power input port of the high-voltage power distribution module 6 through a first copper busbar assembly. The high-voltage output interface 3 is electrically connected to the high-voltage output port of the high-voltage power distribution module 6 through a second copper busbar assembly. The charging socket 4 is electrically connected to the charging port of the high-voltage power distribution module 6 through a third copper busbar assembly.

[0026] By adopting the above technical solution, the high-voltage line body 1 provides an installation carrier and protective space for the internal high-voltage power distribution module 6 and the externally embedded power battery high-voltage terminal 2, high-voltage output interface 3, and charging socket 4. The power battery power received by the power battery high-voltage terminal 2 is transmitted to the power input port of the high-voltage power distribution module 6 through the first copper busbar assembly. After the high-voltage power distribution module 6 distributes and processes the power, it is transmitted from the high-voltage output port to the high-voltage output interface 3 through the second copper busbar assembly. The power from the external charging pile is transmitted to the charging port of the high-voltage power distribution module 6 through the charging socket 4 and the third copper busbar assembly, and then the high-voltage power distribution module 6 transmits it to the power battery in a directional manner, realizing the input, distribution and charging cycle of power.

[0027] In this embodiment, the high-voltage line body 1 is made of die-cast aluminum alloy with an IP67 protection rating. The internal high-voltage power distribution module 6 is a DL-HV-300 high-voltage power distribution unit, which integrates overcurrent, overvoltage and insulation monitoring functions. The first copper busbar assembly, the second copper busbar assembly and the third copper busbar assembly are all made of T2 copper, with a cross-sectional area of ​​50mm². The surface is tin-plated to improve oxidation resistance. The copper busbar is fastened to each interface and the high-voltage power distribution module 6 with M8 stainless steel bolts. Conductive grease is applied to the contact surface to reduce contact resistance.

[0028] In this embodiment, the high-voltage connection port 2 of the power battery is provided with three sets.

[0029] By adopting the above technical solution, the three sets of high-voltage terminals 2 of the power battery can simultaneously connect to three independent power battery packs, or connect to three branches of the same power battery pack. This increases the connection path between the power battery and the high-voltage power distribution module 6 inside the high-voltage line body 1, meets the branch power supply requirements of large-capacity power batteries, avoids the problem of overheating and overload caused by excessive current in a single branch, and at the same time realizes power redundancy backup and improves power supply continuity.

[0030] In this embodiment, all three sets of high-voltage terminals 2 of the power battery adopt high-voltage waterproof interfaces of model HV-100, with a rated voltage of 600V and a rated current of 250A. The center-to-center distance of each set of interfaces is 80mm, and they are evenly distributed along the top edge of the high-voltage line body 1. They are compatible with the interface specifications of mainstream heavy-duty truck power battery packs on the market and can meet the connection requirements of different types of power batteries such as lithium iron phosphate and ternary lithium batteries.

[0031] In this embodiment, the positive and negative interfaces of the high-voltage terminal 2 of the power battery are respectively located on opposite sides of the high-voltage line body 1. The positive interface of the high-voltage terminal 2 of the power battery is electrically connected to the positive interface of the power input port of the high-voltage power distribution module 6 through the positive copper busbar in the first copper busbar assembly. The negative interface of the high-voltage terminal 2 of the power battery is electrically connected to the negative interface of the power input port of the high-voltage power distribution module 6 through the negative copper busbar in the first copper busbar assembly.

[0032] By adopting the above technical solution, the positive and negative interfaces of the high-voltage terminal 2 of the power battery are placed on opposite sides of the high-voltage line body 1, which can avoid the risk of short circuit caused by adjacent positive and negative interfaces. The positive and negative copper busbars in the first copper busbar assembly are respectively connected to the positive and negative interfaces of the high-voltage terminal 2 of the power battery and the positive and negative interfaces of the power input port of the high-voltage power distribution module 6, forming independent positive and negative conductive circuits to ensure the standardization and safety of power transmission.

[0033] In this embodiment, the positive and negative copper busbars are fixed together by an insulating bracket with a spacing of more than 50mm. The insulating bracket is made of epoxy resin and has a withstand voltage rating of not less than 1000V.

[0034] In this embodiment, two sets of high-voltage output interfaces 3 are provided.

[0035] By adopting the above technical solution, the two sets of high-voltage output interfaces 3 can be connected to two types of high-voltage electrical equipment in the vehicle respectively. One set supplies power to the core power equipment such as the drive motor, and the other set supplies power to the auxiliary high-voltage equipment such as the air conditioning compressor and electric heater. This realizes the separation control of power supply and auxiliary power supply, avoids overload of a single set of interfaces, and facilitates fault diagnosis. When a set of interfaces fails, the other set of interfaces can still maintain the normal operation of the corresponding equipment.

[0036] In this embodiment, the two sets of high-voltage output interfaces 3 are high-voltage quick connectors of model HD-200, with a rated current of 300A and a rated voltage of 600V. The interfaces have a built-in anti-misinsertion structure and can only be connected to the matching equipment plug. The distance between the two sets of interfaces is 120mm, and they are fixedly embedded on the right side wall of the high-voltage line body 1. The exposed length of the interface is 30mm, which facilitates connection with the equipment wiring harness.

[0037] In this embodiment, the positive and negative interfaces of the two sets of high-voltage output interfaces 3 are both located on the same side of the high-voltage line body 1. The positive interface of the high-voltage output interface 3 is electrically connected to the positive interface of the high-voltage output port of the high-voltage power distribution module 6 through the positive copper busbar in the second copper busbar assembly. The negative interface of the high-voltage output interface 3 is electrically connected to the negative interface of the high-voltage output port of the high-voltage power distribution module 6 through the negative copper busbar in the second copper busbar assembly.

[0038] By adopting the above technical solution, the positive and negative terminals of the two sets of high-voltage output interfaces 3 are centrally located on the same side of the high-voltage line body 1, which facilitates the centralized arrangement and connection of the high-voltage equipment wiring harness of the whole vehicle, reduces the cross-entanglement of the wiring harness, and the positive copper busbar in the second copper busbar assembly transmits the positive electrical energy of the high-voltage output port of the high-voltage power distribution module 6 to the positive terminal of the high-voltage output interface 3, and the negative copper busbar transmits the corresponding negative electrical energy to the terminal of the high-voltage output interface 3, ensuring the accuracy and stability of the power supply of each interface.

[0039] In this embodiment, the charging socket 4 is provided with two sets. The positive terminal of the charging socket 4 is electrically connected to the positive terminal of the charging port of the high-voltage power distribution module 6 through the positive copper busbar in the third copper busbar assembly. The negative terminal of the charging socket 4 is electrically connected to the negative terminal of the charging port of the high-voltage power distribution module 6 through the negative copper busbar in the third copper busbar assembly.

[0040] By adopting the above technical solution, the two sets of charging sockets 4 can be adapted to different types of charging piles or realize dual-gun fast charging function. One set is used to connect to AC charging piles, and the other set is used to connect to DC charging piles, or both sets can be connected to DC charging piles at the same time to realize high-power fast charging. The positive and negative copper busbars in the third copper busbar assembly transmit the positive and negative electrical energy input from the charging pile to the charging port of the high-voltage power distribution module 6, and then the high-voltage power distribution module 6 regulates and charges the power battery, improving charging flexibility and efficiency.

[0041] In this embodiment, both sets of charging sockets 4 conform to the GB / T20234.3-2015 standard, model CCZ-500, rated voltage 500V, rated current 400A, and the sockets have built-in temperature sensors and leakage protection structures. The positive copper busbar in the third copper busbar assembly has a cross-sectional area of ​​60mm² and a thickness of 5mm. The negative copper busbar has the same specifications as the positive copper busbar. The surface of the copper busbar is covered with insulating heat shrink tubing, with only the connection end exposed. The heat shrink tubing has a withstand voltage rating of 1500V.

[0042] In this embodiment, the high-voltage output interface 3 and the charging socket 4 are located on the same side of the high-voltage line body 1, and are not on the same side as the high-voltage connection port 2 of the power battery.

[0043] By adopting the above technical solution, the high-voltage output interface 3 and the charging socket 4 are arranged on the same side of the high-voltage line body 1, which facilitates the wiring harness connection during vehicle assembly and subsequent maintenance. At the same time, they are placed on different sides from the high-voltage connection port 2 of the power battery, avoiding space congestion and interference caused by the concentration of input, output and charging interfaces, reducing electromagnetic interference between different interface wiring harnesses, and improving the stability of power transmission and signal transmission.

[0044] In this embodiment, the high-voltage output interface 3 and the charging socket 4 are both located on the right side of the high-voltage line body 1, and the high-voltage connection port 2 of the power battery is located on the front and rear sides of the high-voltage line body 1.

[0045] In this embodiment, a low-voltage communication interface 5 is fixedly embedded on the high-voltage line body 1, and a control module 7 is installed inside the high-voltage line body 1. The low-voltage communication interface 5 is electrically connected to the signal output terminal of the control module 7, and the signal input terminal of the control module 7 is electrically connected to the signal output terminal of the high-voltage power distribution module 6.

[0046] By adopting the above technical solution, the control module 7 receives the operating status signal transmitted by the high-voltage power distribution module 6 through the model input terminal, including voltage, current, temperature and fault information, etc. After processing, the control command or status data is transmitted to the low-voltage communication interface 5 through the model output terminal. The low-voltage communication interface 5 establishes a communication connection with the vehicle controller to realize the coordinated control of the high-voltage box device and the vehicle, and ensure the safety and accuracy of the high-voltage system operation.

[0047] In this embodiment, the low-voltage communication interface 5 uses a waterproof aviation plug of model RS485-20 with 10 pins and an IP68 protection rating. The control module 7 uses a microcontroller of model MCU-STM32F103, which has a built-in AD sampling module and a communication protocol parsing module. The control module 7 is connected to the high-voltage power distribution module 6 through a shielded wire of model RVSP-2×0.75. The connecting wire between the control module 7 and the low-voltage communication interface 5 is a silicone rubber wire with a temperature resistance of 125℃.

[0048] In this embodiment, mounting bases 101 are fixedly connected to both opposite sides of the lower end of the high-voltage line body 1.

[0049] By adopting the above technical solution, the mounting bases 101 on the two opposite sides of the lower end of the high-voltage line body 1 provide mounting and fixing points for the entire high-voltage box device, which can stably fix the high-voltage line body 1 on the vehicle frame. The structural design of the mounting base 101 is adapted to the size and shape of the vehicle mounting surface, ensuring the stability after installation and preventing the high-voltage box device from shifting or shaking during vehicle operation.

[0050] Furthermore, vibration isolation pads are fixedly installed at the bottom of each mounting base 101.

[0051] By adopting the above technical solution, the vibration isolation pad at the bottom of the mounting base 101 can buffer the vibration generated during vehicle operation, reduce the impact of vibration on the high voltage power distribution module 6, control module 7 and various copper busbar connection structures inside the high voltage line body 1, avoid problems such as loose connections and component damage caused by vibration, extend the service life of the high voltage box device, and improve operational reliability.

[0052] In this embodiment, under the maximum load condition of simultaneous charging and discharging, the highest temperature rise inside the high-voltage line body 1 is... The following thermal management model must be satisfied: ; in: These are the steady-state operating currents (unit: A) for the charging circuit, the power battery discharging circuit, and the high-voltage output circuit, respectively, with a range of 100-400A. These are the equivalent DC resistances (in Ω) of the corresponding circuits, ranging from 0.0002 to 0.001 Ω. The total static power loss of high-voltage power distribution module 6 and control module 7 (unit: W) ranges from 10 to 30 W. The effective heat dissipation surface area of ​​the outer casing of the high-voltage line body 1 (unit: m²) ranges from 0.01 to 0.05. Let be the cross-sectional area (in m²) of the i-th copper busbar, with a value ranging from (30-80)×10. -6 ; This is the shortest thermal conductivity distance (in meters) from the center of the copper busbar to the inner wall of the outer casing, with a value ranging from 0.01 to 0.05. The value is the net volume of the enclosed space inside the high-voltage line body 1 (unit: m³), ​​and the value ranges from 0.003 to 0.01. The comprehensive heat dissipation coefficient of the outer casing surface, in units of W / (m²·K), with a value range of 10-15 (natural) and 20-50 (mandatory). The value is the thermal conductivity of the copper busbar material, in W / (m·K), with values ​​of 400 (copper) and 200 (aluminum alloy). The internal air convection heat transfer coefficient, in units of W / (K·m³), has a value range of 5-10 (natural) or 15-30 (with fan). n is the total number of copper bars, and can be a positive integer.

[0053] The derivation of the equation is as follows: Thermal management model derivation The thermal management model proposed in this invention is derived based on the law of conservation of energy and the theory of lumped parameter thermal networks. The specific process is as follows: 1. Calculation of heating power Under simultaneous charging and discharging conditions, the main heat sources of the high-voltage box include: Copper busbar Joule heating: ; Static losses of electronic modules: ; The total heating power is: ; 2. Heat dissipation and thermal conductivity calculation There are three main ways to dissipate heat, and their corresponding thermal conductivities are: Thermal conductivity of convection heat dissipation on the outer casing surface: ; in It combines natural convection / forced convection coefficients and radiative heat transfer effects. Copper busbar thermal conductivity: ; Based on Fourier's law of thermal conductivity, the larger the cross-sectional area of ​​the copper busbar and the closer it is to the outer casing, the stronger its thermal conductivity. Internal air convection thermal conduction: ; The internal air transfers heat from the module to the outer shell through convection, which is positively correlated with the internal space volume. The total heat dissipation thermal conductivity is: .

[0054] 3. Steady-state temperature rise model In thermal equilibrium, the power of heat generation equals the power of heat dissipation: ; Summarized as follows: ; III. Example (Design Verification Example) Design parameter settings

[0055] Calculation process Molecules (total heating power): ; Denominator (total heat dissipation thermal conductivity): .

[0056] Temperature rise results:

[0057] Results Analysis The calculated temperature rise of 12.78K is far below the typical allowable temperature rise limit for high-voltage components (such as 40K), indicating that the current integrated design has sufficient margin in terms of thermal performance and a reasonable layout.

[0058] IV. Technical Effects 1. Quantitative thermal management capabilities: Provides accurate temperature rise prediction models, enabling assessment of thermal risks during the design phase and avoiding over- or under-design.

[0059] 2. Guide integrated layout optimization: By adjusting the copper busbar layout parameters ( It can balance electrical and thermal properties; heat dissipation area of ​​the casing With interior space The collaborative design achieves a balance between compactness and heat dissipation; 3. Multi-condition adaptability: The model covers multiple heat sources such as charging, discharging, and module loss, making it suitable for complex actual operating conditions.

[0060] 4. Embodying structural-thermal-electric coupling design: Electrical parameters (I,R) and structural parameters ( ) and material parameters ( Organic combination; Highlighting the innovative concept of "layout as heat dissipation" in integrated design.

[0061] 5. Enhanced safety margin: Through precise temperature rise control, high-voltage components are ensured to operate within the allowable temperature range, extending their lifespan and reducing the failure rate.

[0062] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept by means of the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A high-voltage box device for a power battery, characterized in that, The device includes a high-voltage line body (1), a high-voltage terminal block (2) for a power battery, a high-voltage output interface (3) and a charging socket (4). A high-voltage power distribution module (6) is fixedly installed inside the high-voltage line body (1). The high-voltage terminal block (2), the high-voltage output interface (3) and the charging socket (4) for the power battery are all fixedly embedded on the outer wall of the high-voltage line body (1). The high-voltage terminal block (2) for the power battery is electrically connected to the power input port of the high-voltage power distribution module (6) through a first copper busbar assembly. The high-voltage output interface (3) is electrically connected to the high-voltage output port of the high-voltage power distribution module (6) through a second copper busbar assembly. The charging socket (4) is electrically connected to the charging port of the high-voltage power distribution module (6) through a third copper busbar assembly.

2. The high-voltage box device for a power battery according to claim 1, characterized in that: The high-voltage connection port (2) of the power battery is provided in three sets.

3. The high-voltage box device for a power battery according to claim 2, characterized in that: The positive and negative interfaces of the high-voltage terminal (2) of the power battery are respectively located on opposite sides of the high-voltage line body (1). The positive interface of the high-voltage terminal (2) of the power battery is electrically connected to the positive interface of the power input port of the high-voltage power distribution module (6) through the positive copper busbar in the first copper busbar assembly. The negative interface of the high-voltage terminal (2) of the power battery is electrically connected to the negative interface of the power input port of the high-voltage power distribution module (6) through the negative copper busbar in the first copper busbar assembly.

4. The high-voltage box device for a power battery according to claim 3, characterized in that: The high-voltage output interface (3) is provided in two sets.

5. The high-voltage box device for a power battery according to claim 4, characterized in that: The positive and negative interfaces of the two sets of high voltage output interfaces (3) are both located on the same side of the high voltage line body (1). The positive interface of the high voltage output interface (3) is electrically connected to the positive interface of the high voltage output port of the high voltage distribution module (6) through the positive copper busbar in the second copper busbar assembly. The negative interface of the high voltage output interface (3) is electrically connected to the negative interface of the high voltage output port of the high voltage distribution module (6) through the negative copper busbar in the second copper busbar assembly.

6. The high-voltage box device for a power battery according to claim 5, characterized in that: The charging socket (4) is provided in two sets. The positive terminal of the charging socket (4) is electrically connected to the positive terminal of the charging port of the high voltage power distribution module (6) through the positive terminal copper busbar in the third copper busbar assembly. The negative terminal of the charging socket (4) is electrically connected to the negative terminal of the charging port of the high voltage power distribution module (6) through the negative terminal copper busbar in the third copper busbar assembly.

7. A high-voltage box device for a power battery according to claim 6, characterized in that: The high-voltage output interface (3) and the charging socket (4) are located on the same side of the high-voltage line body (1) and are not on the same side as the high-voltage connection port (2) of the power battery.

8. A high-voltage box device for a power battery according to claim 7, characterized in that: A low-voltage communication interface (5) is fixedly embedded on the high-voltage line body (1). A control module (7) is installed inside the high-voltage line body (1). The low-voltage communication interface (5) is electrically connected to the output terminal of the control module (7). The signal input terminal of the control module (7) is electrically connected to the signal output terminal of the high-voltage power distribution module (6).

9. A high-voltage box device for a power battery according to any one of claims 1-8, characterized in that: Mounting bases (101) are fixedly connected to the two opposite sides of the lower end of the high-voltage line body (1).

10. A high-voltage box device for a power battery according to claim 9, characterized in that: Each mounting base (101) has a vibration isolation pad fixedly installed at its bottom.

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