A battery pack assembly

Abstract

The present invention relates to the field of new energy vehicle technology, and more particularly to a battery pack assembly. The battery pack assembly comprises a battery pack assembly case and a battery module. The battery pack case comprises a bottom plate and an upper cover. The upper cover is characterized in that a central channel convex bulge is provided along the X-axis. A left front convex bulge corresponding to the driver's seat and a right front convex bulge corresponding to the passenger seat are provided on the left and right sides of the central channel convex bulge, respectively. A rear convex bulge corresponding to the rear seat is provided behind the central channel convex bulge along the Y-axis. The battery pack assembly case is provided with two high-voltage output interfaces for connecting to two external high-voltage distribution box assemblies.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a battery pack assembly. Background Art

[0002] Driven by environmental protection and energy security, new energy vehicles have seen rapid development in recent years, with their number increasing rapidly. However, a recurring number of safety incidents involving new energy vehicles has hampered their growth. Admittedly, the development of new energy vehicles has not been without its challenges. As a product that impacts personal, property, and environmental safety, vehicle safety must be ensured from multiple perspectives, particularly regarding the safety of the vehicle's high voltage. As a core component of the high-voltage system, the battery pack assembly requires not only component reliability but also the design of the associated high-voltage circuits from a vehicle perspective to ensure safety. Furthermore, the associated power supply capacity of the battery pack assembly needs to be improved.

[0003] Currently, the main solutions for external high-voltage electrical connections of battery pack assemblies are as follows: design one set of high-current discharge connectors for high-voltage external output, one or more sets of low-current discharge connectors (optional), one set of DC fast-charge connectors (optional), and one set of slow-charge connectors (optional). The existing solutions are mainly used in front-wheel drive or rear-wheel drive solutions: for the main high-current components (motor controller) on the front or rear side of the vehicle, high-voltage components are not present on both the front and rear sides at the same time; or even if other high-voltage components are not on the same side as the motor controller, the low current required by the components (small cable diameter and few loops) have little impact on the front-to-back through-type cable installation process. However, for the four-wheel drive solution, the above technical solution is not conducive to the overall vehicle layout and on-site process installation: the battery pack has only one set of high-current discharge outputs. No matter which direction the output interface is installed in the battery pack, it will inevitably involve the installation of at least one set of high-current cables from front to back (or from back to front); this will involve the following disadvantages: the cables need to be routed from inside the car (occupying space inside the car, involving cables passing through body sheet metal, posing water leakage and electrical safety risks, and difficult cable installation), or routed through the middle channel of the chassis (occupying the middle channel space, difficult to install, and the cables are prone to interfere with the battery pack cover, causing electrical safety risks), or routed on both sides of the chassis (occupying battery pack space, reducing power layout, and difficult installation); all of which will involve space occupation, inconvenience in installation and safety issues.

[0004] The current high-capacity design typically involves placing the battery pack assembly beneath the chassis, with the Y-mounting points fixed to the vehicle's left and right longitudinal beams (the battery pack housing must be located inside the beams). A safe distance from the front overhang and rear subframe is maintained in the X-axis. The large Z-surface maintains a designed distance from the chassis, with a raised center channel for internal power distribution within the battery pack and a raised area under the rear seats for two layers of modules. This approach suffers from two drawbacks: 1. Incomplete charging facilities, 2. Insufficient driving range, and 3. An illogical spatial arrangement. From the perspective of the vehicle as a whole, increasing driving range directly enhances the vehicle's core competitiveness. Undoubtedly, as the vehicle's power source, the battery pack assembly's charge level plays a decisive role in determining driving range. Summary of the Invention

[0005] In order to solve the problems of the prior art, the embodiments of the present invention provide a battery pack assembly. This battery pack assembly structure not only improves the high-voltage electrical connection configuration, making the improved electrical connection method safer and more applicable, but also more specific. The technical solution is as follows:

[0006] A battery pack assembly is provided, including a battery pack assembly case and a battery module. The battery pack case includes a bottom plate and an upper cover. The upper cover is provided with a central channel convex along the X direction. A left front convex corresponding to a driver's seat and a right front convex corresponding to a passenger seat are provided on the left and right sides of the central channel convex, respectively. A rear convex corresponding to a rear seat is provided behind the central channel convex along the Y direction. The battery pack assembly case is provided with two high-voltage output interfaces for connecting to two external high-voltage distribution box assemblies.

[0007] Preferably, the middle channel convex hull is arranged in the middle position of the upper cover in the Y direction, and one side of the middle channel convex hull extends to the edge of the upper cover in the X direction, and the other side is flush with the left front convex hull and the right front convex hull.

[0008] Preferably, the two high-voltage output interfaces are respectively located at the front end and the rear end of the battery pack assembly box.

[0009] Preferably, the two high-voltage output interfaces are respectively located adjacent to the front end of the middle channel convex bulge and adjacent to the rear end of the rear convex bulge.

[0010] Preferably, inside the battery pack assembly box, the two high-voltage output interfaces are connected by soft copper busbars, aluminum busbars and / or cables.

[0011] Preferably, the battery pack internal distribution box of the battery pack assembly box is arranged in the middle channel convex bump, and the two high-voltage output interfaces are connected to the battery pack internal distribution box through soft copper busbars, aluminum busbars and / or cables.

[0012] Preferably, the two high-voltage output interfaces are connected in parallel via the internal distribution box of the battery pack, or are connected in parallel via two points with the same potential of each of the two high-voltage output interfaces.

[0013] Preferably, the two external high-voltage distribution box assemblies are also connected to all high-voltage components, fast charging connection interfaces, and slow charging connection interfaces outside the battery pack assembly.

[0014] Preferably, the battery pack assembly box is also provided with a communication interface, a water inlet and outlet interface, a guard plate installation point and / or a battery pack assembly installation positioning point, and / or the vehicle high-voltage fuse is arranged in the rear convex package.

[0015] Preferably, the outer dimensions of the bottom plate are 1435*1295*120mm+263*876*120mm, the dimensions of the left front convex bulge and the rear front convex bulge are both 322*339*110mm, and the dimension of the rear convex bulge is 788*297*160mm.

[0016] The technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0017] 1. Utilizing the space between the driver and passenger seats, the floor protrudes into the vehicle at this location to increase local Z-direction space for battery module placement. The left and right mounting points are fixed to the left and right door sills to increase Y-direction space for battery module placement. Utilizing the space under the rear passenger seat, the floor protrudes into the vehicle at this location to increase local Z-direction space for module placement. Utilizing the center aisle space, additional space is provided for the battery pack to house high-voltage distribution components. The battery pack assembly's spatial structure is rationally designed to fully expand the available space of the battery pack assembly, significantly improving the battery pack's charging endurance in terms of battery layout and power expansion.

[0018] 2. By configuring two high-current output interfaces at the front and rear ends of the battery pack (the front end is connected to the front high-voltage power distribution box assembly (PDU), and the rear end of the battery pack is connected to the rear high-voltage power distribution box assembly (PDU)), all high-voltage components, fast-charging connection interfaces, slow-charging connection interfaces, etc. on the outside of the battery pack are connected to the two front and rear high-voltage distribution boxes according to the layout of the entire vehicle. This makes it highly applicable and can be applied to different models or different configurations, whether front-wheel drive, rear-wheel drive or four-wheel drive. First, it saves the cost of the entire vehicle. The cost of a single component in the battery pack will increase by about 100-150 yuan (adding one connector and several copper bars), but at least the cost of the entire vehicle will be saved by about 160 yuan (only considering the cost of the minimum positive and negative connection cables, the connector cost will also increase on other components); secondly, it reduces the assembly process (reducing the installation of the wiring harness and related fixing processes), thereby improving production efficiency; in addition, it also improves electrical safety and reliability (the high-current high-voltage connection is located inside the battery pack, reducing the exposure of the external wiring harness and preventing interference friction). BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 1 is a schematic diagram of the battery pack assembly structure provided by an embodiment of the present invention;

[0021] Figure 2 1 is a schematic diagram of the installation structure of the bottom plate portion of the battery pack assembly provided by an embodiment of the present invention after the upper cover is removed;

[0022] Figure 3 This is a schematic diagram of the battery pack assembly installation structure provided by an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the battery pack assembly installation structure provided by an embodiment of the present invention;

[0024] Figure 5 All of them are schematic diagrams of the battery pack assembly installation structure provided by embodiments of the present invention;

[0025] Figure 6 yes Figure 4 Schematic diagram of the cross-sectional structure of the battery pack assembly cut along line AA;

[0026] Figure 7 This is a high-voltage connection circuit diagram of a battery pack assembly provided by an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1- Bottom plate, 11- Side beam, 111- Positioning point, 112- Guard plate installation point, 113- Installation nut, 12- Explosion-proof valve, 13- Communication interface, 14- Water inlet and outlet interfaces, 15- Installation bracket, 16- Water cooling plate, 17- Cooling water pipe, 18- Soft copper busbar; 2- Upper cover, 21- Middle channel convex bulge, 22- Left front convex bulge, 23- Right front convex bulge, 24- Rear convex bulge; 31- First high-voltage output interface, 32- Second high-voltage output interface; 4- Body, 41- Left door sill assembly, 42- Right door sill assembly; 5- Fuel tank inspection port, 6- Front seats, 61- Driver's seat, 62- Passenger seat, 7- Rear seats, 8- Battery module installation, 9- Internal distribution box, 10- Sealing strip. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] It should be noted that the descriptions of the present invention regarding directions such as "below", "front", "back", "left" and "right" are all defined based on the relationship between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or communication connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0032] The battery pack assembly provided by the embodiment of the present invention fully expands the space that can be effectively used by the battery pack assembly by arranging a central channel convex bulge, a left front convex bulge and a right front convex bulge corresponding to the driver's and passenger seats, and a rear convex bulge corresponding to the rear seats on the upper cover of the battery pack case, and two high-voltage output interfaces are also provided on the battery pack assembly, so that the battery pack assembly not only greatly improves the charging endurance of the battery pack in terms of battery layout and power expansion, but also the arrangement of the two high-voltage output interfaces can be applicable to a variety of electrical connection methods and a variety of vehicle configurations, and has strong applicability. In addition, compared with the traditional solution of one set of high-current output interfaces (i.e., one high-voltage output interface), the presence of the two high-voltage output interfaces reduces the complexity of cable routing, improves electrical safety and reliability, saves cable costs and installation costs, and improves the performance of the battery pack assembly as a whole.

[0033] The battery pack assembly provided by the embodiment of the present invention is described in detail below with reference to specific embodiments and drawings.

[0034] Figure 1is a schematic diagram of the battery pack assembly structure provided by an embodiment of the present invention, such as Figure 1 As shown, the battery pack assembly provided by an embodiment of the present invention includes a battery pack assembly case and a battery module, which is arranged within the battery pack assembly case. The battery pack case includes a bottom plate 1 and an upper cover 2. The upper cover 2 has a central channel convex 21 along the X-axis. A left front convex 22 corresponding to the driver's seat and a right front convex 23 corresponding to the passenger seat are located on either side of the central channel convex 21. A rear convex 24 corresponding to the rear seat is located behind the central channel convex 21 along the Y-axis. The battery pack assembly case is provided with a first high-voltage output interface 31 and a second high-voltage output interface 32 for connecting to two external high-voltage distribution box assemblies.

[0035] Preferably, the middle channel convex 21 is arranged in the middle position of the upper cover 2 in the Y direction, and one side of the middle channel convex 21 extends to the edge of the upper cover 2 in the X direction, and the other side is flush with the left front convex 22 and the right front convex 23.

[0036] In addition, preferably, the two high-voltage output interfaces 31 and 32 are respectively located at the front and rear ends of the battery pack assembly box. Figure 1 As shown. The front and rear ends here are based on the front and rear positions of the battery pack assembly relative to the vehicle body during installation. As can be clearly seen from the figure, since the positions of the central channel protrusion 21 and the rear protrusion 24 correspond to the positions of the front and rear seats, respectively, the first high-voltage output interface 31 is located at the front end of the battery pack assembly case, and the second high-voltage output interface 32 is located at the rear end of the battery pack assembly case. Further preferably, the first high-voltage output interface 31 and the second high-voltage output interface 32 are respectively located near the front end of the central channel protrusion 21 and the rear end of the rear protrusion 24. The front end of the central channel protrusion 21 and the rear end of the rear protrusion 24 are similar to the directions used to determine the front and rear ends of the battery pack assembly case described above, and will not be further explained. Since one more high-voltage output interface is provided compared to the traditional technology, it is naturally for the convenience of cable routing and the convenience of power supply for different needs. Therefore, the two high-voltage output interfaces are respectively provided at the front and rear ends of the battery pack box. Of course, the two high-voltage output interfaces can also be arranged in a manner such as the left and right ends of the battery pack box. As long as it can play the functional role stated in the embodiment of the present invention, the embodiment of the present invention does not impose any special restrictions on it.

[0037] Figure 2 Schematic diagram of the bottom plate installation structure of the battery pack assembly provided by the embodiment of the present invention after removing the upper cover. Figure 2As shown, a side beam 11 is provided at the outer edge of the base plate 1. The side beam 11 not only serves to strengthen the strength and rigidity of the battery pack assembly, but also has the function of installing and positioning the battery pack assembly on the vehicle body 4. Specifically, the side beam 11 is provided with a positioning point 111, a guard plate installation point 112, and a mounting nut 113 for installation and fixation. A first high-voltage output interface 31, a communication interface 13, and a water inlet and outlet interface 14 are provided on the base plate 1 in a position corresponding to the front end of the aforementioned middle channel convex 21. A second high-voltage output interface 32 is provided on the base plate 1 in a position corresponding to the rear end of the aforementioned rear convex 24. An explosion-proof valve 12 is also provided at the edge of the base plate 1.

[0038] Figure 3 FIG is a schematic diagram of the battery pack assembly installation structure provided by an embodiment of the present invention. Figure 3 As shown, the battery pack assembly box is installed on the left door sill assembly 41 and the right door sill assembly 42 of the aforementioned vehicle body 4, so that the vehicle body chassis space can be fully utilized. The traditional vehicle high-voltage fuse (MSD) has a separate inspection port. If maintenance is required, the carpet must be removed, etc., which is inconvenient. In this embodiment of the present invention, the MSD can be set in the rear convex bump 24. Since the MSD is located below the rear passenger table and chairs (the location of the traditional vehicle fuel tank inspection port), there is no need to open a new mold (i.e., inspection port) when inspecting the MSD. The traditional vehicle fuel tank inspection port 5 can be directly used. Only the table and chairs need to be folded up and the inspection cover removed, which is convenient for inspection.

[0039] Figure 4 and Figure 5 These are schematic diagrams of the battery pack assembly installation structure provided by the embodiments of the present invention. Figure 4 and Figure 5 As shown, the battery pack assembly is installed on the vehicle body below the corresponding front seats 6 and rear seats 7 using the mounting holes and positioning points on the battery pack assembly's base plate 1. The left front bump 22 corresponds to the driver's seat 61 of the front row, the right front bump 23 corresponds to the passenger seat 62 of the front row, and the center channel bump 21 is located between the left and right front bumps 22 and 23.

[0040] Figure 6 yes Figure 4 Schematic diagram of the cross-sectional structure of the battery pack assembly cut along line AA. Figure 6 As shown, the base plate 1 and the upper cover 2 are fixed together by fixing components (such as fixing bolts). To ensure good sealing of the battery pack case, a sealing strip 10 is provided between the base plate 1 and the upper cover 2 during installation using the fixing components. Multiple mounting brackets 15 are provided within the battery pack case for mounting components such as the battery module 8, the battery pack internal distribution box 9 (BDU), the water cooling plate 16, and the cooling water pipe 17.

[0041] Preferably, when arranging the interior of the battery pack box, a two-layer arrangement of battery modules is adopted. First, the bottom battery module 8 is arranged near the bottom plate 1, and then the upper battery module 8 is arranged above the bottom battery module 8, in the internal space of the left convex 22 and the internal space of the right convex 23, and the internal distribution box 9 (BDU) is arranged in the relatively narrow internal space of the middle channel convex 21. This arrangement method has a higher space utilization rate in the entire battery pack box.

[0042] In addition, inside the battery pack assembly box, the two high-voltage output interfaces are wired via a soft copper busbar 18, or, in other embodiments, soft copper busbars, aluminum busbars and / or cables may also be used for wiring.

[0043] Figure 7 This is a high voltage connection circuit diagram of a battery pack assembly provided by an embodiment of the present invention. Figure 7 As shown, the two high-voltage output interfaces are connected in parallel to the front external high-voltage distribution box assembly (front PDU) and the rear external high-voltage distribution box assembly (rear PDU) of the two external high-voltage distribution box assemblies through the battery pack's internal power distribution box (BDU). Alternatively, in another embodiment, the two high-voltage output interfaces are connected in parallel through the two same potential points of each of the two high-voltage output interfaces. Preferably, the two external high-voltage distribution box assemblies are also connected to all high-voltage components, fast charging connection interfaces, and slow charging connection interfaces outside the battery pack assembly.

[0044] The battery pack solutions in the existing technology have a relatively low capacity, generally around 52kWh (battery pack assembly box dimensions: 1730*835*324mm). To further increase the battery capacity based on the above battery pack assembly box structure, the following preferred battery pack box dimensions and corresponding layouts are provided:

[0045] Since the battery pack assembly is placed under the chassis, the main advantage is that the space size is greatly expanded. The space size can be divided into three parts:

[0046] 1. The boundary size of the large plane on the bottom layer is 1435*1295*120mm+263*876*120mm; 3360 battery cells can be arranged; 2. The boundary size of the front convex package on the second layer is 322*339*110mm, one on each side, for a total of 336 battery cells; 3. The boundary size of the rear convex package on the second layer is 788*297*160mm, for a total of 420 battery cells; 4. The size of the middle channel on the second layer is for placing high-voltage power distribution components, not for placing battery cells. A total of 4116 battery cells can be arranged. This solution can use a certain brand of 21700 battery cells, combined with a battery management system, with the following parameters: battery cell rated voltage: 3.63V, battery cell rated capacity 4.7h; total arranged power:

[0047] 3.63V*4.7Ah*4116=70.2KWh.

[0048] All the above optional technical solutions can be arbitrarily combined to form optional embodiments of the present invention, and will not be described in detail here.

[0049] In summary, the battery pack assembly provided by the embodiments of the present invention has the following beneficial effects compared to the prior art:

[0050] 1. Utilizing the space between the driver and passenger seats, the floor protrudes into the vehicle at this location to increase local Z-direction space for battery module placement. The left and right mounting points are fixed to the left and right door sills to increase Y-direction space for battery module placement. Utilizing the space under the rear passenger seat, the floor protrudes into the vehicle at this location to increase local Z-direction space for module placement. Utilizing the center aisle space, additional space is provided for the battery pack to house high-voltage distribution components. The battery pack assembly's spatial structure is rationally designed to fully expand the available space of the battery pack assembly, significantly improving the battery pack's charging endurance in terms of battery layout and power expansion.

[0051] 2. By configuring two high-current output interfaces at the front and rear ends of the battery pack (the front end is connected to the front high-voltage power distribution box assembly (PDU), and the rear end of the battery pack is connected to the rear high-voltage power distribution box assembly (PDU)), all high-voltage components, fast-charging connection interfaces, slow-charging connection interfaces, etc. on the outside of the battery pack are connected to the two front and rear high-voltage distribution boxes according to the layout of the entire vehicle. This makes it highly applicable and can be applied to different models or different configurations, whether front-wheel drive, rear-wheel drive or four-wheel drive. First, it saves the cost of the entire vehicle. The cost of a single component in the battery pack will increase by about 100-150 yuan (adding one connector and several copper bars), but at least the cost of the entire vehicle will be saved by about 160 yuan (only considering the cost of the minimum positive and negative connection cables, the connector cost will also increase on other components); secondly, it reduces the assembly process (reducing the installation of the wiring harness and related fixing processes), thereby improving production efficiency; in addition, it also improves electrical safety and reliability (the high-current high-voltage connection is located inside the battery pack, reducing the exposure of the external wiring harness and preventing interference friction).

[0052] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or by a program to instruct the relevant hardware, and the program may be stored in a computer-readable storage medium, which may be a read-only memory, a disk, or an optical disk, etc.

[0053] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0054] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0055] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0056] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0057] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0059] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A battery pack assembly, comprising a battery pack assembly box and a battery module, wherein the battery pack assembly box comprises a bottom plate and an upper cover, characterized in that: The upper cover is provided with a central channel convex bulge along the X direction, and a left front convex bulge corresponding to the driver's seat and a right front convex bulge corresponding to the passenger seat are provided on the left and right sides of the central channel convex bulge respectively, and a rear convex bulge corresponding to the rear seat is provided behind the central channel convex bulge along the Y direction. The battery modules are arranged in two layers in the battery pack box, wherein: Arrange the bottom battery modules near the bottom plate; Above the bottom battery module, upper battery modules are arranged in the inner spaces of the left front convex package and the right front convex package respectively; the battery pack internal distribution box of the battery pack assembly box is arranged in the middle channel convex package; The battery pack assembly box is provided with two high-voltage output interfaces for connecting to two external high-voltage distribution box assemblies; The two high-voltage output interfaces are respectively located adjacent to the front end of the middle channel convex bulge and the rear end of the rear convex bulge; Inside the battery pack assembly box, the two high-voltage output interfaces are connected via soft copper busbars, aluminum busbars and / or cables; The two high-voltage output interfaces are connected to the internal distribution box of the battery pack via soft copper busbars, aluminum busbars and / or cables.

2. The battery pack assembly according to claim 1, characterized in that: In the Y direction, the middle channel convex hull is arranged in the middle position of the upper cover, and in the X direction, one side of the middle channel convex hull extends to the edge position of the upper cover, and the other side is flush with the left front convex hull and the right front convex hull.

3. The battery pack assembly according to any one of claims 1 to 2, characterized in that: The two high-voltage output interfaces are connected in parallel via the internal distribution box of the battery pack, or are connected in parallel via two points with the same potential of each of the two high-voltage output interfaces.

4. The battery pack assembly according to claim 3, characterized in that: The two external high-voltage distribution box assemblies are also connected to all high-voltage components, fast charging connection interfaces, and slow charging connection interfaces outside the battery pack assembly.

5. The battery pack assembly according to any one of claims 1 to 2, characterized in that: The battery pack assembly box is also provided with a communication interface, a water inlet and outlet interface, a guard plate installation point and / or a battery pack assembly installation positioning point, and / or the vehicle high-voltage fuse is arranged in the rear convex package.

6. The battery pack assembly according to any one of claims 1 to 2, characterized in that: The outer dimensions of the base plate are 1435*1295*120mm+263*876*120mm, the dimensions of the left front convex bump are 322*339*110mm, and the dimensions of the rear convex bump are 788*297*160mm.

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