Battery pack and vehicle having same

Abstract

A battery pack and a vehicle having same. The battery pack comprises: a frame, separation assemblies, a liquid cooling plate, and a bottom protection plate. The frame is used for enclosing and forming a containing cavity. The separation assemblies are arranged in the frame so as to divide the containing cavity into multiple containing sub-cavities. The liquid cooling plate is located at the bottom portion of the frame, a bottom maintenance port is provided on the liquid cooling plate directly opposite to a containing sub-cavity, and the liquid cooling plate, the frame, and at least the separation assembly near the bottom maintenance port are fixedly connected. The bottom protection plate is below and detachably connected to the liquid cooling plate and is used for opening and closing the bottom maintenance port.

Description

Battery pack and vehicle having the same

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to a Chinese patent application filed on December 29, 2023, with application number 202311869056.6 and patent application name “Battery Pack, Vehicle Having Same,” all contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of battery packs, and in particular to a battery pack and a vehicle having the battery pack. Background Art

[0004] With the continuous advancement of new energy technologies, battery-vehicle integration continues to advance. Direct integration of the battery pack into the vehicle chassis allows for a higher level of integration. The battery pack consists of a frame, a cover, a battery pack, and electrical connectors, which are housed within the housing.

[0005] Typically, a liquid cooling plate is installed at the bottom of the battery pack. This plate is typically non-removable. When the electrical modules within the battery pack need to be disassembled for inspection, they can only be accessed from the side or top. Some solutions create a bottom access opening in the liquid cooling plate, but this easily becomes loose during maintenance, hindering the long-term stability of the electrical modules.

[0006] Summary of the Invention

[0007] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a battery pack that improves the support and protection of the electrical module by rationally arranging fixed connection positions, thereby improving operational stability and reliability.

[0008] The present application also aims to provide a vehicle having the above-mentioned battery pack.

[0009] According to an embodiment of the present application, the battery pack includes: a frame, a partition assembly, a liquid cooling plate and a bottom guard plate, wherein the frame is used to enclose a accommodating cavity; the partition assembly is arranged in the frame to divide the accommodating cavity into a plurality of accommodating sub-cavities; the liquid cooling plate is located at the bottom of the frame, and the liquid cooling plate is provided with a bottom inspection port facing one of the accommodating sub-cavities, and the liquid cooling plate and the frame, and at least the partition assembly adjacent to the bottom inspection port, are fixedly connected; the bottom guard plate is detachably connected to the bottom of the liquid cooling plate for opening and closing the bottom inspection port.

[0010] According to the battery pack of an embodiment of the present application, a partition assembly is provided to partition the housing cavity within the frame, separating the electrical module and the battery pack. By providing a bottom access opening on the liquid cooling plate, at least a portion of the battery pack's electrical modules can be installed above the bottom access opening. When maintenance is required, the bottom access opening can be opened for easy access, improving the convenience of battery pack maintenance. By locating the liquid inlet and outlet adjacent to the bottom access opening, pipes need to be connected above the inlet and outlet, while at least a portion of the electrical modules need to be installed above the bottom access opening. This allows for a compact layout without occupying additional area. The freed-up area on the liquid cooling plate can be used to accommodate the battery pack, improving space utilization above the liquid cooling plate. The liquid cooling pipes connected here are located adjacent to the electrical modules, enhancing heat dissipation from the modules. By securely connecting the liquid cooling plate to the frame and the partition assembly adjacent to the bottom access opening, the electrical modules are positioned in a more stable environment, less likely to become loose during long-term operation, thereby improving the stability and reliability of the operating environment.

[0011] A vehicle according to an embodiment of the present application includes the above-mentioned battery pack.

[0012] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is an overall schematic diagram of the battery pack of some embodiments; Figure 2 is a schematic diagram of the positional relationship between the electrical module and the battery pack of some embodiments at one viewing angle; Figure 3 is a schematic diagram of the positional relationship between the electrical module and the battery pack of some embodiments at another viewing angle; Figure 4 is an exploded view of the battery pack of some embodiments at one viewing angle; Figure 5 is a structural diagram of the battery pack of some embodiments when components and parts are hidden at one viewing angle; Figure 6 is a structural diagram of the battery pack of some embodiments when components and parts are hidden at another viewing angle; Figure 7 is a structural diagram of the wiring harness of the electrical module of some embodiments; Figure 8 is a structural diagram of the electrical module of some embodiments FIG9 is a schematic diagram of a top view of a partial structure of an electrical module of some embodiments; FIG10 is a schematic diagram of the structure of the battery pack when the side inspection cover of some embodiments is opened; FIG11 is a schematic diagram of the local structure of the battery pack when the wiring harness is hidden and the side inspection cover is opened in some embodiments; FIG12 is a schematic diagram of the local structure of the housing and the support frame of some embodiments from a top view; FIG13 is a schematic diagram of the local structure of the housing, the support frame and the mounting plate of some embodiments from a top view; FIG14 is a schematic diagram of the local structure of the housing, the support frame and the mounting plate of some embodiments from another perspective; FIG15 is a schematic diagram of the rear view of the housing and the support frame of some embodiments; FIG16 is a schematic diagram of the assembly structure of the BMS main control board of some embodiments from one perspective; FIG17 is a schematic diagram of the assembly structure of the BMS main control board of some embodiments from a FIG18 is a schematic diagram of the assembly structure of the BMS main control board in another perspective of some embodiments; FIG18 is a schematic diagram of the assembly structure of the BMS slave control board in one perspective of some embodiments; FIG19 is a schematic diagram of the assembly structure of the BMS slave control board in another perspective of some embodiments; FIG20 is a schematic diagram of the structure of the first BDU module in one perspective of some embodiments; FIG21 is an exploded schematic diagram of the first BDU module in another perspective of some embodiments; FIG22 is an exploded schematic diagram of the battery pack in another perspective of some embodiments; FIG23 is a partial enlarged view of FIG22; FIG24 is a schematic diagram of the structure of the second electrical part in some embodiments; FIG25 is an exploded view of the second electrical part in some embodiments; FIG26 is a schematic diagram of the structure of the shock absorber column in some embodiments Schematic diagram; Figure 27 is a schematic diagram of the partial structure of the second electrical housing in some embodiments; Figure 28 is a partial diagram of the seat fixing fasteners assembled on the upper cover in some embodiments; Figure 29 is a partial cross-sectional view of the seat fixing fasteners assembled on the upper cover in some embodiments; Figure 30 is a cross-sectional view of the battery pack housing in some embodiments; Figure 31 is a cross-sectional view of the frame side beams and mounting beams on the battery pack in other embodiments; Figure 32 is a partial diagram of the battery pack housing in still other embodiments; Figure 33 is an exploded view of the battery pack housing in still other embodiments; Figure 34 is a three-dimensional view of the liquid cooling plate in some embodiments; Figure 35 is a bottom view of the liquid cooling plate in some embodiments; Figure 36 is a schematic diagram of the structure of the bottom guard plate and the buffer layer thereon according to some embodiments of the present application;FIG37 is a schematic diagram of a partial structure of a bottom guard plate according to other embodiments of the present application; FIG38 is a schematic diagram of the entire vehicle according to some embodiments; FIG39 is a diagram showing the positional relationship of a battery pack within the vehicle body according to some embodiments.

[0014] Figure 1: Vehicle 1000, battery pack 100, shell 1, frame 10, front side wall 11, rear side wall 12, middle section 121, side section 122, left side wall 13, right side wall 14, bottom guard plate 15, bottom main board 150, thickened rib 151, bottom edge strip 153, avoidance gap 1531, first bottom connecting hole 156, second bottom connecting hole 157, top cover 16, cover body 161, hard layer 161a, buffer layer 161b, mounting beam 17, first mounting beam 171, second mounting beam 172, mounting portion 17-10, mounting cavity 17-40, shock absorbing layer 18, side inspection port 101, external interface 102, frame side beam 10-1, frame portion 10-10, connecting rib 10-6, frame cavity 10-40, first A fixing hole 111, a battery pack 2, a battery group 20, a battery cell 201, a pressure relief member 202, a first busbar 203, a second busbar 204, an electrical module 3, an electrical connection structure 31, a first wiring harness 311, a first flexible wire 3111, a first plug connector 3112, a second flexible wire 3113, a second plug connector 3114, a third flexible wire 3115, a third plug connector 3116, a second wiring harness 312, a second signal transmission interface 3121, a third wiring harness 313, a fourth wiring harness 314, a high-voltage electrical terminal 315, a low-voltage electrical terminal 316, a copper bus 317, a first electrical part 32, a first BDU module 321, a first electrical shell 3211, a first opening 3211a, and a second opening 3212. 11b, first positioning boss 3211c, second threaded hole 3211d, first positioning cavity 3211e, second positioning boss 3211f, third threaded hole 3211g, second positioning cavity 3211h, fuse 3212, current sensor 3213, first plug interface 32131, first conductive sheet 3214, second conductive sheet 3215, top protective cover 3216, first through-hole 3216a, limiting groove 3216b, limiting protrusion 3216c, first snap portion 3216d, side protective cover 3217, second snap portion 3217a, curved panel 3217b, BMS main control board 322, second plug interface 3221, BMS slave control board 323, third plug interface 3231, mounting plate 324, flange 3241 , mounting hole 3242, first bolt 3291, second bolt 3292, third bolt 3293, fourth bolt 3294, fifth bolt 3295, second electrical part 33, fourth flexible wire 331, second electrical shell 332, shock absorbing column 333, thick column section 3331, thin column section 3332, center hole 3333, first extension plate 3351, second extension plate 3352, matching hook 33521, lower protrusion 336, second through hole 3361, wire fastener 3362, main relay 337, power strip 338, first signal transmission interface 339, first fastener 361, second fastener 362, third fastener 363, fourth fastener 364, fifth fastener 365, support frame 4, support longitudinal rod 40,First longitudinal rod 401, second longitudinal rod 402, third longitudinal rod 403, fourth longitudinal rod 404, supporting crossbar 41, first threaded hole 411, avoidance groove 412, partition assembly 5, partition beam 50, partition portion 50-10, partition cavity 50-40, partition crossbeam 51, lower crossbeam 511, upper crossbeam 512, first notch 5131, second notch 5132, third notch 5133, first hanging hole 514, second hanging hole 515, partition longitudinal beam 52, fastening sleeve 53, strap 54, accommodating chamber V1, accommodating sub-chamber V10, front sub-chamber V11, rear sub-chamber V12, circulation channel V101, width x1 of circulation channel, liquid cooling plate 6, liquid flow channel 6-01, liquid inlet 6-02, liquid outlet 6-03, joint edge 6-04, upper liquid plate 6-05, lower liquid Plate 6-06, welding through-hole 6-061, first liquid-cooling connection hole 6-07, second liquid-cooling connection hole 6-08, first liquid-cooling avoidance hole 6-09, second liquid-cooling avoidance hole 6-10, diverter channel 6-11, return channel 6-12, heat dissipation channel 6-13, first extension channel 6-14, second extension channel 6-15, avoidance arc edge 6-16, liquid-cooling pipe 601, liquid-cooling joint 602, bottom access port 61, fastening bolt 611, sealing ring 62, bottom access cover 63, side access cover 64, air pressure balance valve 65, seat fixing fastener 66, seat fixing threaded hole 661, rotating platform 662, supporting circular platform 663, fixing plate 67, triangular reinforcement plate 68, insulating and heat-insulating cover 81, vehicle body 200, passenger space 220, upper concave cavity 240, seat 300. DETAILED DESCRIPTION

[0015] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0016] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0017] The battery pack 100 and various components of the battery pack 100 according to an embodiment of the present application are described below with reference to the accompanying drawings.

[0018] It is understandable that the application field of the battery pack 100 is not limited, and the installation posture of the battery pack 100 will also be different in different application scenarios. When introducing the structure of the battery pack 100 in this article, in embodiments that do not involve specific application scenarios, the orientation or position relationships such as "up", "down", "front", "back", "left", "right", "top", "bottom", "longitudinal", "transverse", "length", "width", "thickness", and "height" mentioned are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Specifically, as shown in Figures 1 and 3, the first direction D1 is the front-to-back direction, and the second direction D2 is the left-to-right direction. At this time, the battery pack 100 is arranged horizontally, and the first direction D1 and the second direction D2 are both perpendicular to the height direction. The height direction of the battery pack 100 is the up-down direction shown in Figure 1. Drawing on this orientation, the four side walls of the shell 1 are referred to in this application as the front side wall 11, the rear side wall 12, the left side wall 13, and the right side wall 14, that is, the front side wall 11 and the rear side wall 12 are the two opposite side walls of the shell 1 along the first direction D1, the left side wall 13 and the right side wall 14 are the two opposite side walls of the shell 1 along the second direction D2, and the top cover 16 and the bottom guard plate 15 of the shell 1 are the two opposite side walls of the shell 1 in the height direction. If the battery pack 100 is set vertically in another application scenario, the first direction D1 is adaptively adjusted to the up and down direction, and the height direction of the battery pack 100 is adaptively adjusted to the horizontal direction. At this time, the names of the side walls of the shell 1 remain unchanged, but the actual positions of the side walls in this application scenario should be adaptively adjusted. Similar scenarios will not be repeated below.

[0019] As shown in FIG. 1 to FIG. 6 , a battery pack 100 according to an embodiment of the present application includes: a housing 1 , a battery pack 2 and an electrical module 3 .

[0020] The shell 1 of the battery pack 100 includes a frame 10, a top cover 16 and a bottom guard plate 15. The frame 10 surrounds the accommodating cavity V1 of the shell 1. The top cover 16 and the bottom guard plate 15 are connected to the upper and lower ends of the frame 10 to close the accommodating cavity V1.

[0021] In some embodiments, as shown in Figures 5, 6, 12 and 13, the battery pack 100 also includes a partition component 5 disposed in the shell 1. The partition component 5 is disposed in the shell 1 and is disposed in the frame 10. The partition component 5 is used to separate the accommodating cavity V1 into multiple accommodating sub-cavities V10, so that the battery pack 2 and the electronic control structure can be placed in different accommodating sub-cavities V10.

[0022] The battery pack 2 is located in the housing 1, and the electrical module 3 is also installed in the housing 1. The battery pack 2 includes a plurality of battery cells 201, and the plurality of battery cells 201 in the battery pack 2 are connected in series and in parallel to provide required voltage and current.

[0023] The electrical module 3 includes an electrical connection structure 31 and an electrical control structure. The electrical control structure is responsible for energy control and management of the battery pack 100 to ensure the safe operation of the battery pack 100. The electrical connection structure 31 is a connecting conductor between the electrical control structure and various parts in the battery pack 100.

[0024] In some embodiments, the electronic control structure is integrated into one unit and occupies one location within the battery pack 100. In other embodiments, the electronic control structure includes a first electrical portion 32 and a second electrical portion 33, i.e., the electronic control structure is provided separately and occupies different locations within the battery pack 100. The electrical connection structure 31 is used to electrically connect the first electrical portion 32, the second electrical portion 33, and the battery pack 2.

[0025] The electrical module 3's power terminals are used to connect to the external environment for charging / discharging and for external communication. The power terminals also include a high-voltage terminal 315 and a low-voltage terminal 316, which are mounted on the frame 10. The high-voltage terminal 315 serves as the charging terminal for the battery pack 100 to supply power to the outside world and also serves as the charging terminal for the battery pack 100 itself. The low-voltage terminal 316 serves as the communication terminal for the battery pack 100 to communicate with the outside world.

[0026] It should be noted that the terms "high voltage" and "low voltage" herein do not limit specific voltage values, but rather their relative values. The high voltage value is typically the power supply voltage of the battery pack 100, while the low voltage value is typically the signal transmission voltage within the battery pack 100.

[0027] In existing technology, the electrical modules of a battery pack include a BDU (Battery Disconnect Unit) and a BMS (Battery Management System). The BDU implements high-voltage on / off and safety protection functions under the control of the BMS. In actual applications, the electrical modules are concentrated on one side of the battery pack, and a long busbar is provided to achieve electrical connections within the battery pack. There are at least three long busbars.

[0028] The present application divides the electrical module 3 into a first electrical part 32 and a second electrical part 33 , which can reduce the circuit connections running through the front and back of the battery pack 100 , thereby reducing the application cost of the electrical connection and the weight of the battery pack 100 , and optimizing the electrical layout within the battery pack 100 .

[0029] According to the battery pack 100 of the embodiment of the present application, by setting the electrical module 3 as the first electrical part 32 and the second electrical part 33, the electrical layout inside the battery pack 100 can be facilitated, and the spatial arrangement of the electrical module 3 inside the battery pack 100 can be optimized. In the prior art, the space occupied by the electrical module in the battery pack is smaller than the space occupied by the battery pack, and the height dimension of some electrical modules is larger than the height dimension of the battery pack. In order to accommodate the electrical module in the shell, it is necessary to increase the size of the shell, which also increases the size of the entire battery pack and reduces the utilization rate of the internal space of the battery pack. In the present application, after the optimized design, it is convenient to reduce the height of the electrical module 3, for example, the height dimension of the battery pack 2 is greater than or equal to the height dimension of the electrical module 3, thereby avoiding the increase in the size of the battery pack 100 caused by the excessive height of the electrical module 3 and improving the utilization rate of the internal space of the battery pack 100. The height dimension of each part in this article refers to the dimension of the part in the height direction (i.e., the up and down direction shown by D1 in Figure 1).

[0030] Specifically, the battery pack 2, the first electrical part 32, and the second electrical part 33 are located in different accommodating sub-cavities V10. Furthermore, the battery pack 2 includes multiple battery groups 20, each battery group 20 including multiple battery cells 201. The multiple battery groups 20 are located in different accommodating sub-cavities V10, and the battery groups 20, the first electrical part 32, and the second electrical part 33 are located in different accommodating sub-cavities V10. In some embodiments, the accommodating sub-cavity V10 includes a front sub-cavity V11 for accommodating the second electrical part 33. The accommodating sub-cavity V10 includes a rear sub-cavity V12 for accommodating the first electrical part 32.

[0031] Specifically, the shape of the frame 10 usually determines the overall shape of the battery pack 100, and the frame 10 is a square frame or a hexagonal frame, etc. The common frame 10 is a quadrilateral. Specifically, the frame 10 is composed of a plurality of frame side beams 10-1 connected in sequence, and each side frame side beam 10-1 constitutes a side wall of the shell 1. When the frame 10 is a rectangle, the four sides of the rectangle constitute the front side wall 11, the rear side wall 12, the left side wall 13, and the right side wall 14 of the shell 1. Furthermore, the shell 1 also includes a mounting beam 17 connected to the frame 10, and the mounting beam 17 can be installed on the frame side beam 10-1. For example, the front side wall 11, the rear side wall 12, the left side wall 13, and the right side wall 14 are all equipped with a mounting beam 17. Furthermore, when the battery pack 100 is assembled, the frame side beam 10-1 of the frame 10 is connected to the top cover 16 and the bottom guard plate 15 by bolts to improve the connection reliability.

[0032] Optionally, during assembly, the top of the battery pack 2 is directly glued to the top cover 16, so that the two are combined into an inseparable whole. Optionally, during assembly, the bottom of the battery pack 2 is directly glued to the bottom guard plate 15, so that the two are combined into an inseparable whole. Of course, the present application is not limited to this. The bottom guard plate 15 can also be set as a detachable connection structure to facilitate the disassembly and maintenance of the battery pack 100 from the bottom. The top cover 16 can also be set as a detachable connection structure to facilitate the disassembly and maintenance of the battery pack 100 from the top. In some schemes, the top of the battery pack 2 is not in direct contact with the top cover 16, but is separated by an insulating and heat-insulating layer, and is glued and fixed by the insulating and heat-insulating layer, thereby blocking the upward heat transfer of the battery pack 2.

[0033] In some embodiments, a side inspection port 101 is provided on the side wall of the housing 1, and the first electrical part 32 is provided opposite the side inspection port 101. If a side inspection port 101 is provided on the rear side wall 12, the first electrical part 32 is located on the rear side of the battery pack 2 and is provided opposite the side inspection port 101. The side inspection port 101 can be adapted to the shape of the vehicle 1000 when the battery pack 100 is applied to the vehicle 1000. When an upper concave cavity 240 is provided at the bottom of the vehicle 1000 (as shown in Figures 38 and 39), the side wall of the housing 1 is separated from the side wall of the upper concave cavity 240. As shown in Figure 39, the upper concave cavity 240 leaves space behind the side inspection port 101, so that the side inspection port 101 of the battery pack 100 can be opened from under the vehicle 1000 to perform maintenance on the first electrical part 32.

[0034] In some embodiments, the second electrical portion 33 is located on the front side of the battery pack 2 .

[0035] In some embodiments, the frame 10 includes a rear side wall 12, and a rear sub-cavity V12 is defined inside the frame 10 between the partition assembly 5 and the rear side wall 12. The electrical module 3 of the battery pack 100 includes a first electrical part 32 and a second electrical part 33. The first electrical part 32 is installed in the rear sub-cavity V12, and the second electrical part 33 is located above the bottom inspection port 61. A side inspection port 101 is provided on the rear side wall 12 opposite the first electrical part 32.

[0036] In some specific embodiments, as shown in Figures 6-8 , the first electrical section 32 includes a BMS master control board 322 and a BMS slave control board 323 for signal control. Specifically, the first electrical section 32 also includes a first BDU module 321. The first BDU module 321 is located between the BMS master control board 322 and the BMS slave control board 323. Furthermore, as shown in Figure 9 , the second electrical section 33 includes a second BDU module.

[0037] Specifically, the BMS main control board 322 and the BMS slave control board 323 cooperate with the first BDU module 321 and the second BDU module to achieve high-voltage on / off and safety protection functions. The BMS main control board 322 and the BMS slave control board 323 communicate with each other through the wiring harness of the electrical connection structure 31, and the BMS main control board 322 and the BMS slave control board 323 communicate with the first BDU module 321 and the second BDU module through the wiring harness of the electrical connection structure 31. The first BDU module 321 is located in the middle of the battery pack 2 in the second direction D2, and the second BDU module is connected to the battery pack 2 via a copper busbar 317. In the first electrical section 32, the BMS main control board 322, the first BDU module 321, and the BMS slave control board 323 are arranged in sequence along the second direction D2. The wiring harness portion of the electrical connection structure 31 is shown in Figure 7 and includes multiple wiring harnesses.

[0038] Here, the first BDU module 321 is placed between the BMS master control board 322 and the BMS slave control board 323, centered on the first BDU module 321. This facilitates symmetry in the connection between the first BDU module 321 and the battery pack 2. When voltage division protection is required for the battery pack 2, the first BDU module 321 is symmetrical with the two battery groups 20 of the battery pack 2, facilitating voltage division balance.

[0039] Specifically, the BMS main control board 322 and the BMS slave control board 323 are detachably arranged through the side inspection port 101. It is understandable that in terms of failure frequency, the failure rate of the BMS main control board 322 and the BMS slave control board 323 is higher, so they are set to be detachably connected to facilitate direct removal for maintenance and inspection in case of failure.

[0040] For example, the first electrical module 3 includes at least one BMS slave control board 323 , which can collect and transmit battery cell data of the battery pack 2 and transmit it to the BMS master control board 322 via the electrical connection structure 31 . Thus, the BMS slave control board 323 can be configured according to the number of battery cells 201 in the battery pack 2 .

[0041] Specifically, two BMS slave control boards 323 are stacked in the vertical direction. The BMS slave control boards 323 measure 86.5 mm in the first direction D1, 240 mm in the second direction D2, and 19.7 mm in height. When stacked, the two BMS slave control boards 323 are 48.7 mm tall. The BMS master control board 322 measures 102 mm in the first direction D1 and 260 mm in the second direction D2. The BMS master control board 322 has a height of 24 mm. The first BDU module 321 measures 103 mm in the first direction D1, 153 mm in the second direction D2, and 85.5 mm in height. Along the second direction D2, the combined dimensions of the BMS slave control boards 323, BMS master control board 322, and first BDU module 321 in the first electrical section 321 are at least 653 mm.

[0042] As shown in FIG. 10 and FIG. 11 , the height dimensions of the first electrical part 321 and the second electrical part 302 are both lower than the battery pack 2 .

[0043] In some specific embodiments, as shown in Figures 17, 18, and 11, BMS slave panels 323 are arranged in a horizontal direction. There are at least two BMS slave panels 323 stacked in the vertical direction, and the projections of all BMS slave panels 323 on the rear side wall 12 are completely located within the side access opening 101. This allows the BMS slave panels 323 to be directly pulled horizontally during assembly and disassembly, reducing the risk of bumps caused by tilting. Furthermore, when the side access opening 101 is open, the status of the BMS slave panels 323 can be more intuitively observed even without removing them.

[0044] As shown in Figures 18, 19, and 11, the BMS main control board 322 is positioned horizontally, with its projection on the rear sidewall 12 completely within the side access opening 101. This allows the BMS main control board 322 to be pulled horizontally during assembly and disassembly, minimizing the risk of bumps and bumps caused by tilting. Furthermore, when the side access opening 101 is open, the status of the BMS slave control board 323 can be readily observed, even without removing the BMS main control board 322.

[0045] In some embodiments, as shown in Figures 12-14 , the battery pack 100 further includes a support frame 4 , which is located within the housing 1 . The first electrical component 32 is mounted on the support frame 4 . The support frame 4 provides support for the first electrical component 32 , reducing shaking of the first electrical component 32 during movement of the battery pack 100 , thereby improving the safety of the battery pack 100 . Furthermore, the provision of the support frame 4 also elevates the first electrical component 32 , allowing it to be aligned with the side access opening 101 .

[0046] Specifically, the support frame 4 is located in the rear chamber V12 and connects the rear sidewall 12 and the adjacent partition beam 51 (described below). Optionally, the front and rear ends of the support frame 4 are bolted or welded to the partition beam 51 and the rear sidewall 12 respectively.

[0047] The support frame 4 is provided with a plurality of first threaded holes 411 on the side facing the side access opening 101. These first threaded holes 411 are distributed sequentially along the second direction D2. The BMS main control board 322 and the BMS slave control board 323 can be directly or indirectly connected to the support frame 4 via bolts, and are connected to the first threaded holes 411 for easy assembly and disassembly.

[0048] In some embodiments, as shown in Figures 16-19 , the first electrical section 32 includes two mounting plates 324 , on which the BMS master control board 322 and the BMS slave control board 323 are mounted, respectively. The mounting plates 324 are secured within the housing 1 via first bolts 3291 . The first bolts 3291 are arranged in the front-to-back direction, with the heads of the first bolts 3291 located at the rear end. The projection of the first bolts 3291 on the rear sidewall 12 is located within the side access opening 101 .

[0049] Specifically, as shown in FIG16 , the BMS main control board 322 is connected to a mounting plate 324, for example, by means of vertically arranged bolts. Specifically, as shown in FIG18 , the BMS slave control board 323 is connected to another mounting plate 324, for example, by means of vertically arranged bolts. Specifically, as shown in FIG13 and FIG14 , during assembly, the mounting plate 324 with the BMS main control board 322 or the BMS slave control board 323 is placed on the support frame 4, and a flange 3241 extending downward is formed on the side of the mounting plate 324 facing the side inspection port 101. As shown in FIG16 to FIG19 , a mounting hole 3242 corresponding to the first threaded hole 411 is provided on the flange 3241, and the first bolt 34 passes through the mounting hole 3242 and the first threaded hole 411 in sequence for fixing.

[0050] As shown in Figures 12 to 14, the support frame 4 includes four support cross bars 41 distributed along the first direction D1, and each support cross bar 41 extends along the second direction D2, two of which are close to the side inspection port 101, and the other two support cross bars 41 are away from the side inspection port 101. A first threaded hole 411 is provided on each support cross bar 41, and an avoidance groove 412 is provided on the support cross bar 41 close to the side inspection port 101, and the avoidance groove 412 corresponds to the first threaded hole 411 away from the side inspection port 101.

[0051] The mounting plate 324 is provided with two flanges 3241 extending along a first direction D1, each flange 3241 having a mounting hole 3242. The mounting plate 324 is placed on the support frame 4. A downwardly extending flange 3241 is formed on the side of the mounting plate 324 facing the side access opening 101. The flange 3241 has mounting holes 3242 corresponding to the first threaded holes 411. The first bolt 34 can pass through the mounting holes 3242 and the first threaded holes 411, respectively, to secure the mounting plate 324 to the support frame 4. The first bolt 34 is positioned on the support frame 4 along a second direction D2, reducing interference during assembly and disassembly, thereby improving installation and disassembly efficiency. The flange 3241 also serves to locate the mounting position of the mounting plate 324 and assist in securing the mounting plate 324 to the support frame 4. The flange 3241 of the mounting plate 324 extends downward toward the side access opening 101. The flange 3241 is a single long strip, and mounting holes 3242 are provided at positions corresponding to the first threaded holes 411. Alternatively, the flange 3241 can be a long strip with avoidance grooves 412, and the flanges 3241 are provided at positions corresponding to the first threaded holes 411.

[0052] In some specific embodiments, as shown in Figures 12 and 13, the support frame 4 further includes four supporting longitudinal rods 40, each of which extends along the first direction D1. The four supporting longitudinal rods 40 are respectively and sequentially arranged as a first longitudinal rod 401, a second longitudinal rod 402, a third longitudinal rod 403, and a fourth longitudinal rod 404. A supporting crossbar 41 is connected between the first longitudinal rod 401 and the second longitudinal rod 402, and a supporting crossbar 41 is connected between the third longitudinal rod 403 and the fourth longitudinal rod 404.

[0053] The first electrical section 32 includes two detachable components, which are located on the support crossbars 41 on either side. Thus, the support longitudinal bars 40 and support crossbars 41 in the support frame 4 can support the detachable components. By configuring the support frame 4 as a combination of the support bars 40 and support crossbars 41, compared to configuring the support frame 4 as a single support plate, the support bars 40 are lightweight, ensuring structural strength while reducing the weight of the entire battery pack 100. Furthermore, the manufacturing process for the support bars 40 is simple, reducing production costs and improving production efficiency. Specifically, the two detachable components are the BMS main control board 322 and the BMS slave control board 323.

[0054] Specifically, a support crossbar 41 is connected between the first longitudinal bar 401 and the second longitudinal bar 402. Two support crossbars 41 are arranged along the first direction D1, and each support crossbar 41 includes a mounting hole 3242. The support crossbar 41 located toward the front of the first direction D1 is the first support crossbar, while the support crossbar 41 located toward the rear of the first direction D1 is the second support crossbar. The height of the second support crossbar is partially greater than that of the first support crossbar 41, fully exposing the mounting hole 3242 on the second support crossbar. At the mounting hole 3242, the first and second support crossbars have the same height.

[0055] In some optional embodiments, as shown in FIG32 , to enhance the support stability of the support frame 4, the housing 1 further includes a triangular reinforcement plate 68. The two right-angled sides of the triangular reinforcement plate 68 connect the support frame 4 and the adjacent partition beam 51, respectively. This utilizes the triangular stability of the triangle to enhance the support and connection reliability of the support frame 4 and the adjacent partition beam 51. Optionally, the triangular reinforcement plate 68 is welded to the support frame 4. Optionally, the triangular reinforcement plate 68 is welded to the partition beam 51.

[0056] Furthermore, the BMS slave control board 323 is detachably connected to the first and second longitudinal rods 401, 402 via a mounting plate 324, and the BMS master control board 322 is detachably connected to the third and fourth longitudinal rods 403, 404 via another mounting plate 324. Using the supporting longitudinal rods 40 at the ends to connect the BMS master control board 322 and the BMS slave control board 323 facilitates positioning and increases the connection length in the first direction D1.

[0057] Furthermore, the first BDU module 321 can be installed on the second longitudinal rod 402 and the third longitudinal rod 403. For example, the first BDU module 321 includes a first electrical shell 3011, and the first electrical shell 3011 is connected to the second longitudinal rod 402 and the third longitudinal rod 403 by vertically arranged bolts.

[0058] In some embodiments, as shown in Figures 10, 20, and 21, the first BDU module 321 includes a first electrical housing 3211 and a fuse 3212. The first electrical housing 3211 has a first opening 3211a at the rear, and the fuse 3212 is detachably mounted within the first electrical housing 3211. Specifically, the fuse 3013 is detachably attached to the first electrical housing 3011. When the battery pack 100 fails and the electrical connection is severed, the fuse 3013 needs to be replaced or manually reset.

[0059] Specifically, the first BDU module 321 also includes a side cover 3217, which removably covers the first opening 3211a. The provision of the first electrical housing 3211 and the side cover 3217 protects the internal electrical components of the first BDU module 321, such as the fuse 3212. Furthermore, internal electrical components such as the fuse 3212 are disposed within the first electrical housing 3211, enabling securement and installation of the internal electrical components and improving the convenience and reliability of the fixed connection. Furthermore, as shown in FIG21 , second snap-fit ​​portions 3217a are provided at both ends of the side cover 3217, allowing the side cover 3217 to be snap-fitted to the first electrical housing 3211 via the second snap-fit ​​portions 3217a.

[0060] In some specific embodiments, as shown in Figure 21, the side cover 3217 includes a curved panel 3217b positioned between the second snap-fit ​​portions 3217a on either side. Its shape matches the fuse 3212, improving compactness and securing the fuse 3212. The curved panel 3217b can be a circular arc plate. Optionally, the curved panel 3217b can be a grille plate to enhance heat dissipation. The provision of a connecting structure with the second snap-fit ​​portions 3217a improves connection stability and convenience. By configuring the side cover 3217 as a circular arc grille plate, the structural strength of the side cover 3217 can be enhanced.

[0061] Specifically, the first BDU module 321 further includes a current sensor 3213, which is connected in series with the fuse 3212 and is detachably disposed within the first electrical housing 3211. This allows the current sensor 3213 to promptly detect the current passing through the fuse 3212, enabling the BMS slave control board 323 to promptly determine whether the fuse 3212 needs to be blown.

[0062] Here, the internal circuit structure and specific working principles of the fuse 3212, the current sensor 3213, the BMS main control board 322, and the BMS slave control board 323 are all existing technologies and will not be repeated here.

[0063] Specifically, as shown in Figure 21, the fuse 3212 is fixed to the first electrical shell 3211 by a second bolt 3292, the head of the second bolt 3292 is set toward the side inspection port 101, and the projection of the second bolt 3292 on the rear side wall 12 is located inside the side inspection port 101, thereby improving the reliability and stability of the connection of the fuse 3212 to the first electrical shell 1.

[0064] When the fuse 3212 fails and needs to be replaced, first unlock the second latch portion 3217a, so that the side cover 3217 is separated from the first electrical shell 3211 to expose the second bolt 3292, then unscrew the second bolt 3292 to release the fixed connection between the fuse 3212 and the first electrical shell 3211, and finally remove the faulty fuse 3212 through the side inspection port 101.

[0065] Similarly, the current sensor 3213 is fixed to the first electrical shell 3211 by a third bolt 3293. The head of the third bolt 3293 is set toward the side inspection port 101, and the projection of the third bolt 3293 on the rear side wall 12 is located inside the side inspection port 101, thereby improving the reliability and stability of the current sensor 3213 connected to the first electrical shell 1.

[0066] When the current sensor 3213 fails and needs to be replaced, first unlock the second latch portion 3217a, so that the side cover 3217 is separated from the first electrical shell 3211 to expose the third bolt 3293, then unscrew the third bolt 3293 to release the fixed connection between the current sensor 3213 and the first electrical shell 3211, and finally remove the faulty current sensor 3213 through the side inspection port 101.

[0067] In some embodiments, as shown in FIG21 , a first positioning cavity 3211e and a second positioning cavity 3211h are provided within the first electrical housing 3211, both of which are open toward the side access opening 101. The fuse 3212 is located within the first positioning cavity 3211e, and the current sensor 3213 is located within the second positioning cavity 3211h. Thus, the first positioning cavity 3211e and the second positioning cavity 3211h are used to position the fuse 3212 and the current sensor 3213, respectively, for ease of assembly.

[0068] Specifically, a first positioning boss 3211c is formed on at least one side of the first positioning cavity 3211e in the first electrical housing 3211, and the end of the fuse 3212 is detachably connected to the first positioning boss 3211c. The fuse 3212 is fixedly connected to the side, which reduces obstacles to the fuse 3212.

[0069] A second positioning boss 3211f is formed on at least one side of the second positioning cavity 3211h in the first electrical housing 3211. The end of the current sensor 3213 is detachably connected to the second positioning boss 3211f. The current sensor 3213 is fixedly connected to the side, which reduces obstacles to the current sensor 3213.

[0070] Furthermore, threaded holes are provided on the surfaces of the first and second positioning bosses 3211c, 3211f facing the side access opening 101. The fuse 3212 is bolted to the first positioning boss 3211c, and the current sensor 3213 is bolted to the second positioning boss 3211f. Bolted connection is convenient and quick, and does not obstruct vision.

[0071] In some specific embodiments, as shown in Figure 21, two first positioning bosses 3211c are provided in the first electrical shell 3211, and the rear surface of the first positioning boss 3211c is provided with a second threaded hole 3211d. A first positioning cavity 3211e is defined between the two first positioning bosses 3211c. The fuse 3212 is located in the first positioning cavity 3211e. Both ends of the fuse 3212 are connected to the two first positioning bosses 3211c by second bolts 3292, and each second bolt 3292 is threadedly engaged in the second threaded hole 3211d.

[0072] Two second positioning bosses 3211f are provided on the first electrical shell 3211, and a third threaded hole 3211g is provided on the rear surface of the second positioning boss 3211f. A second positioning cavity 3211h is defined between the two second positioning bosses 3211f. The current sensor 3213 is located in the second positioning cavity 3211h. Both ends of the current sensor 3213 are connected to the two second positioning bosses 3211f through third bolts 3293. Each third bolt 3293 is threadedly fitted in the third threaded hole 3211g.

[0073] In this way, the fuse 3212 and the current sensor 3213 are accurately positioned, and the structure is made compact.

[0074] Optionally, the first positioning boss 3211 c and the second positioning boss 3211 f are staggered in height and have different distances from the side inspection opening 101 .

[0075] Furthermore, the two first positioning bosses 3211c are arranged in the left-right direction, while the two second positioning bosses 3211f are also arranged in the left-right direction. The two second positioning bosses 3211f are at a different height than the two first positioning bosses 3211c, and the rear surfaces of the first positioning bosses 3211c and the rear surfaces of the second positioning bosses 3211f are staggered in the front-to-back direction. This arrangement allows the fuse 3212 and current sensor 3213 to be staggered in the front-to-back direction during assembly and disassembly, which helps reduce the size of the first BDU module 321 in both the height and front-to-back directions.

[0076] Specifically, first positioning boss 3211c is located below second positioning boss 3211f, thereby installing fuse 3212 below current sensor 3213. Furthermore, fuse 3212 is located behind current sensor 3213, closer to side access port 101. This arrangement makes fuse 3212, which has a higher failure rate, easier to remove, considering its failure frequency.

[0077] Advantageously, as shown in FIG21 , the first BDU module 321 further includes: a first conductive sheet 3214, the first conductive sheet 3214 being located in the first positioning cavity 3211e and being located on the side of the fuse 3212 away from the side inspection port 101, one end of the first conductive sheet 3214 being pressed on the side of the fuse 3212 away from the side inspection port 101, and the other end being pressed on the side of the current sensor 3213 away from the side inspection port 101, so that the first conductive sheet 3214 is connected in series with the fuse 3212 and the current sensor 3213 without affecting the observation and disassembly of the two from the side inspection port 101.

[0078] In some specific embodiments, as shown in FIG21 , the first BDU module 321 further includes a first conductive sheet 3214, which is located within the first positioning cavity 3211e and in front of the fuse 3212. A second positioning boss 3211f is located directly above the first positioning boss 3211c, and the left-right dimension of the current sensor 3213 is smaller than the left-right dimension of the fuse 3212. A portion of the side edge of the first conductive sheet 3214 extends laterally, then bends and connects to the first positioning boss 3211c to electrically connect to the fuse 3212. A portion of the upper edge of the first conductive sheet 3214 extends upward, then bends and connects to the second positioning boss 3211f to electrically connect to the current sensor 3213.

[0079] With this arrangement, the fuse 3212 and the current sensor 3213 are connected in series using the first conductive sheet 3214 . The first conductive sheet 3214 is not easily detached and has high reliability. The width of the first conductive sheet 3214 can be set larger, which is beneficial to reducing resistance, etc.

[0080] Specifically, as shown in Figure 21, the first electrical housing 3211 has a second opening 3211b at the top. The first BDU module 321 also includes a top cover 3216 and two second conductive plates 3215. The two second conductive plates 3215 are spaced apart and arranged on the top of the first electrical housing 3211. Each second conductive plate 3215 extends in the front-to-back direction.

[0081] The rear end of one second conductive sheet 3215 is bent downward and rests on a first positioning boss 3211c, electrically connected to the fuse 3212. The rear end of the other second conductive sheet 3215 is bent downward and rests on a second positioning boss 3211f, electrically connected to the current sensor 3213. The front ends of the two second conductive sheets 3215 are connected to the battery pack 2 via copper busbars 317. A top protective cover 3216 is removably attached to the top of the first electrical housing 3211 and covers the two second conductive sheets 3215.

[0082] The provision of the top protective cover 3216 not only facilitates disassembly, assembly, and maintenance, but also provides a certain degree of positional constraint on the second conductive sheet 3215. This arrangement provides high electrical reliability and more flexible parts replacement.

[0083] Optionally, as shown in FIG. 20 and FIG. 21 , the current sensor 3213 has a first plug interface 32131 on the rear side, and the top protective cover 3216 is provided with a first through hole 3216 a facing the first plug interface 32131 .

[0084] As shown in Figures 7 and 8, the electrical connection structure 31 includes: a first flexible wire 3111 located on the rear side of the first BDU module 321, and a first plug connector 3112 is provided at the end of the first flexible wire 3111. The first plug connector 3112 is plugged into the first plug interface 32131 through the first through-hole 3216a.

[0085] During assembly and disassembly, the first plug connector 3112 can be directly removed from the side access opening 101. The first flexible wire 3111 can then be unplugged to inspect the internal structure of the first BDU module 321 or to perform assembly and disassembly. Once assembly is complete, the first plug connector 3112 can be directly inserted from the rear, making assembly extremely convenient and reducing interference from tangled wires.

[0086] Optionally, as shown in Figures 20 and 21 , a retaining groove 3216b extending forward and backward is provided on the top surface of the top protective cover 3216. The front end of the retaining groove 3216b is positioned opposite the first perforation 3216a, and a portion of the first flexible conductor 3111 is positioned within the retaining groove 3216b. The retaining groove 3216b can constrain the first flexible conductor 3111, reducing its shaking during vibrations and the chance of loosening due to shaking. Furthermore, compared to other conductors, the first flexible conductor 3111 is thinner and lighter, which improves connection reliability and enhances the safety of the battery pack 100.

[0087] Optionally, the top protective cover 3216 is further provided with a limiting protrusion 3216c on at least one side of the limiting groove 3216b to further constrain the first flexible wire 3111 and improve its safety. Furthermore, as shown in FIG21 , the top protective cover 3216 is provided with two limiting protrusions 3216c, each of which has a barb at the end to facilitate hooking the first flexible wire 3111.

[0088] 21, the top cover 3216 is provided with first buckle portions 3216d at both ends, and the top cover 3216 can be buckled and connected to the first electrical housing 3211 through the first buckle portions 3216d. By providing the first buckle portion 3216d connection structure, the stability and convenience of the connection are improved.

[0089] In some embodiments, as shown in Figures 7, 8, and 10, a second plug interface 3221 is provided on the rear side of the BMS main control board 322, and a third plug interface 3231 is provided on the rear side of the BMS slave control board 323. The electrical connection structure 31 also includes a second flexible wire 3113 located on the rear side of the BMS main control board 322. The end of the second flexible wire 3113 is provided with a second plug connector 3114, which fits into the second plug interface 3221.

[0090] The electrical connection structure 31 further includes: a third flexible wire 3115 located at the rear side of the BMS slave control board 323 , and a third plug connector 3116 is provided at the end of the third flexible wire 3115 , which is fitted into the third plug port 3231 .

[0091] With this arrangement, during disassembly or assembly, the second and third plug connectors 3114, 3116 can be directly removed from the side access opening 101. By removing the second flexible wire 3113, the structure of the BMS main control board 322 can be inspected or disassembled. By removing the third flexible wire 3115, the structure of the BMS slave control board 323 can be inspected or disassembled.

[0092] When the assembly is completed, the second plug connector 3114 and the third plug connector 3116 are directly inserted from the rear side, which makes the assembly very convenient and reduces interference from messy wires.

[0093] As shown in Figures 6 and 8, in some embodiments, the electrical connection structure 31 includes a first wiring harness 311. The first wiring harness 311 is arranged around the first electrical portion 31 and electrically connected to the battery pack 2. The first wiring harness 311 is provided with connectors for connecting to the BMS main control board 302, the BMS slave control board 303, and the first BDU module 321, respectively. The connectors are located on the side of the first electrical portion 31 facing the side access opening 101. The first wiring harness 311 is arranged around the first electrical portion 31, and the connectors on the first wiring harness 311 can be reoriented toward the side access opening 101. This makes it easier to remove the first wiring harness 311 through the side access opening 101, further improving maintenance convenience.

[0094] Specifically, the first flexible wire 3111 , the second flexible wire 3113 , and the third flexible wire 3115 are all led out from the first wire harness 311 .

[0095] Specifically, the first wiring harness 311 is provided with a plurality of harness buckles spaced along the direction in which the first wiring harness 311 extends, and the harness buckles are disposed toward the side access opening 101. The plurality of harness buckles secure the first wiring harness 311, reducing the possibility of the first wiring harness 311 swinging and the possibility of the connectors on the first wiring harness 311 not being securely connected.

[0096] In some embodiments, as shown in Figures 1 and 3, the battery pack 100 further includes a side access cover 64, which can cover the side access opening 101 and is openably connected to the rear side wall 12. The side access cover 64 protects the internal structure of the battery pack 100 and prevents dust, moisture, etc. from entering the battery pack 100 through the side access opening 101.

[0097] Specifically, as shown in Figure 15 , rear sidewall 12 has a plurality of first fixing holes 111 spaced apart along the circumference of side access opening 101. A side access cover 64 can be placed over side access opening 101 and includes a plurality of through-holes corresponding to the positions of first fixing holes 111. Fasteners connect the first fixing holes 111 and the through-holes to enhance connection stability.

[0098] Alternatively, the side inspection cover 64 is connected to the rear side wall 12, one side of the side inspection cover 64 can be flipped relative to the rear side wall 12, and the other side of the side inspection cover 64 is provided with through holes corresponding to the fixing holes of the rear side wall 12, and is connected by fasteners.

[0099] Specifically, the side access opening 101 has a dimension of 720 mm in the second direction D2 and a height of 70 mm. The height of the first electrical section 32 is smaller than that of the side access opening 101, allowing the BMS main control board 322, BMS slave control board 323, and first BDU module 321 in the first electrical section 32 to pass through the side access opening 101.

[0100] Specifically, when it is necessary to replace one of the BMS main control board 322, the BMS slave control board 323 and the first BDU module 321, release the fasteners in the first fixing hole 111, remove the side inspection cover 64, and disassemble the wiring harness buckles 91 one by one through the first inspection port 12, remove the plug connector and pass the faulty electrical component through the side inspection port 101.

[0101] In some embodiments, as shown in Figures 7 and 8, the electrical connection structure 31 includes a second wiring harness 312, a third wiring harness 313, and a fourth wiring harness 314. The second wiring harness 312 is arranged along the length of the second electrical portion 33, and the second wiring harness 312 is detachably connected to at least one end of the second electrical portion 33, thereby electrically connecting the electrical connection structure 31 to the second electrical portion 33.

[0102] The third wiring harness 313 is connected between the first wiring harness 311 and the second wiring harness 312, thereby enabling communication between the first electrical portion 31 and the second electrical portion 33. A fourth wiring harness 314 is connected to the third wiring harness 313. A low-voltage electrical terminal 316 is provided at the end of the fourth wiring harness 314. Through the low-voltage electrical terminal 316 of the fourth wiring harness 314, the battery pack 100 can transmit signals to devices outside the battery pack 100.

[0103] In some embodiments, to reduce the shaking of the electrical connection structure 31 in the battery pack 100 , a plurality of fasteners may be provided to restrain the wiring harness.

[0104] Specifically, as shown in FIG7 , a first fastener 361 may be provided to constrain the first wire harness 311, for example, by tying the first wire harness 311 to a partition beam 51. A second fastener 362 may be provided to constrain the second wire harness 312, for example, by tying the second wire harness 312 to a partition beam 52. A third fastener 363 may be provided to constrain the third wire harness 313, for example, by tying the third wire harness 314 to a partition beam 51.

[0105] Optionally, a fourth fastener 364 may be provided to constrain the fourth wiring harness 314, for example, the fourth wiring harness 314 may be fastened to a partition beam 51. Optionally, a fifth fastener 365 may be provided to constrain the first wiring harness 311, with the first fastener 361 being located at the front side of the first electrical portion 32, and the fifth fastener 365 being located at the rear side of the first electrical portion 32, for example, the fifth fastener 365 may be fastened to the support frame 4 or the rear side wall 12.

[0106] In some embodiments, as shown in Figures 13 and 6 , the partition assembly 5 includes at least one partition beam 50, such as at least one partition transverse beam 51 or at least one partition longitudinal beam 52, which cooperates with the frame 10 to divide the accommodating chamber V1 into multiple accommodating chambers V10. Each partition transverse beam 51 extends in the left-right direction, and each partition longitudinal beam 52 extends in the front-back direction.

[0107] In some specific embodiments, as shown in FIG. 3 and FIG. 14 , the partition assembly 5 includes: at least three partition beams 51 , the partition beams 51 are extended in the left-right direction, and the at least three partition beams 51 are spaced apart in the front-back direction.

[0108] In some specific embodiments, as shown in FIG3 and FIG14 , the partition assembly 5 includes: at least two partition beams 51 , each partition beam 51 extending in the left-right direction, and two adjacent partition beams 51 spaced apart in the front-back direction.

[0109] The battery pack 2 is located between the frontmost dividing beam 51 and the rearmost dividing beam 51. The frontmost dividing beam 51 and the front sidewall 11 define a front compartment V11, within which the second electrical component 33 is located. The rearmost dividing beam 51 and the rear sidewall 12 define a rear compartment V12, within which the first electrical component 32 is located.

[0110] The provision of at least three partitioning beams 51 divides the interior of the battery pack 100 housing 1 into zones, not only improving the structural strength of the battery pack 100 but also providing mounting locations for internal components. Furthermore, the provision of at least three partitioning beams 51 can also restrict the direction in which internal fluids are discharged.

[0111] The partition assembly 5 also includes partition longitudinal beams 52. Specifically, the partition assembly 5 includes at least two partition longitudinal beams 52 extending in the front-to-back direction. A partition longitudinal beam 52 is connected between each pair of adjacent partition transverse beams 51, thereby dividing the space between the two adjacent partition transverse beams 51 into two accommodating chambers V10. A accommodating chamber V10 is defined between the two adjacent partition transverse beams 51, a partition longitudinal beam 52, and the sidewalls of the housing 1. The battery pack 2 includes multiple battery groups 20, each of which contains a battery group 20.

[0112] In some specific embodiments, the frame 10 includes a left side wall 13 and a right side wall 14 . The battery group 2 of the battery pack 100 includes a plurality of battery groups 20 . The battery groups 20 are distributed in the accommodating chamber V10 between the two partition beams 51 .

[0113] In FIG3 and FIG4 , the battery pack 2 includes four battery groups 20 , each of which is located in a receiving compartment V10 .

[0114] In some specific embodiments, as shown in Figures 14 and 6, each partitioning beam 51 includes a lower beam 511 and an upper beam 512. The lower beam 511 extends in the left-right direction, with its ends respectively connected to the left side wall 13 and the right side wall 14 of the housing 1. The upper beam 512 extends in the left-right direction and is fixedly connected above the lower beam 511. Each lower beam 511 is connected to at least two spaced-apart upper beams 512.

[0115] On the same partition beam 51, a first notch 5131 is defined between the upper beam 512 on the left and the left side wall 13 of the shell 1, a second notch 5132 is defined between the upper beam 512 on the right and the right side wall 14 of the shell 1, a third notch 5133 is defined between two adjacent upper beams 512, and a third notch 5133 is provided above the joint between two adjacent partition longitudinal beams 52.

[0116] This overlapping arrangement of horizontal and vertical beams facilitates installation and provides support for the third wiring harness 313 as it passes through the battery pack 2. This not only improves the orderliness of wiring, but also eliminates the need for the third wiring harness 313 to be inserted into the receiving chamber V10, reducing the chance of the pressure relief member 202 spraying electrolyte toward the third wiring harness 313, thereby minimizing the risk of short-circuiting or disconnecting the third wiring harness 313.

[0117] Specifically, the third wire harness 313 is fastened to the partition longitudinal beam 52 through a wire harness buckle, thereby reducing shaking of the third wire harness 313 during vibration and reducing the probability of loosening caused by shaking.

[0118] In some specific embodiments, as shown in Figures 6 and 8 , a first wiring harness 311 is located within the rear compartment V12 and surrounds the first electrical section 32. The first wiring harness 311 is electrically connected to the battery pack 2 and is removably connected to the first electrical section 32. A second wiring harness 312 is located within the front compartment V11 and is arranged in the left-right direction behind the second electrical section 33. The second wiring harness 312 is removably connected to the second electrical section 33. This ensures that the first and second wiring harnesses 311 and 312 are each restrained, reducing vibration and the risk of loose connections caused by vibration.

[0119] Furthermore, as shown in Figure 6, the battery pack 100 also includes at least one fastening sleeve 53 for connecting to an external seat. The fastening sleeve 53 is mounted on the partition assembly 5. For example, the fastening sleeve 53 is fixedly connected to at least one partition crossbeam 51, with at least two fastening sleeves 53 spaced apart along the left-right direction of the partition crossbeam 51. Thus, when the battery pack 100 is used in the vehicle 1000, the seats in the passenger space 220 can be fastened to the fastening sleeves 53 via fasteners. This eliminates the need for a separate seat mounting crossbeam within the passenger space 220, improving the structural compactness and reducing the number of parts.

[0120] Optionally, a fastening sleeve 53 corresponding one-to-one to the seat fixing fastener 66 is provided on the partition beam 51 , and the lower end of the seat fixing fastener 66 is threadedly connected in the fastening sleeve 53 .

[0121] Alternatively, as shown in Figures 6 and 1, the height of the partition beam 51 is less than that of the housing 1. Fastening sleeves 53 are welded to the top of the partition beam 51, and the top cover 16 of the housing 1 is provided with seat-securing fasteners 66 facing each fastening sleeve 53. This allows the seat to be connected to both the seat-securing fasteners 66 and the fastening sleeves 53 via fasteners, extending the vertical length of the seat. Furthermore, when the seat is subjected to force, the force is transferred to the entire battery pack 100, dissipating the impact force.

[0122] In some specific embodiments, as shown in FIG2 , the battery cells 201 in the battery group 20 are arranged in a left-right direction, and pressure relief members 202 are provided on the left and / or right ends of the battery cells 201. In the example of FIG2 , each battery cell 201 in each battery group 20 is provided with a pressure relief member 202 to enhance safety. The number of pressure relief members 202 provided on each battery cell 201 is not limited.

[0123] Specifically, the battery cells 201 are sheet-shaped and extend along the second direction D2. Multiple battery cells 201 are stacked along the first direction D1 to form a battery group 20, thereby increasing the arrangement density of the battery group 20 and improving the energy density of the battery pack 100.

[0124] The battery group 20 forms a flow channel V101 between its left and right ends and the inner wall of the sub-cavity V10. This eliminates the need for separate channels. The channels between the ends of the battery group 20 and the inner wall of the sub-cavity V10 are used to discharge high-pressure gas discharged by the pressure relief member 202, thereby improving internal space utilization. This flow channel V101 also serves as a buffer channel for the battery group 20.

[0125] Optionally, the width x1 of the circulation channel V101 is 20-50 mm, thereby effectively ensuring the flowability of the circulation channel V101 without being too wide and occupying too much volume. Optionally, the width x1 of the circulation channel V101 is 35 mm. Here, the width x1 of the circulation channel V101 refers to its dimension in the second direction D2.

[0126] Correspondingly, an air pressure balancing valve 65 may be provided on at least one of the front side wall 11 and the rear side wall 12 so that the air flow at the flow channel V101 can be discharged from the air pressure balancing valve 65 .

[0127] Optionally, as shown in FIG5 , a through external port 102 is provided on the rear side wall 12 of the housing 1, so that the exhausted high-pressure gas can be discharged from a certain external port 102. Further optionally, as shown in FIG5 , a pressure balancing valve 65 is provided at at least one external port 102, so that when high-pressure gas is discharged from the interior, the pressure balancing valve 65 is opened to exhaust gas, and remains sealed when the air pressure is normal.

[0128] In some embodiments, as shown in FIG6 , the front side wall 11 of the frame 10 is adjacent to the bottom inspection port 61, and the battery pack 100 further includes: a high-voltage power terminal 315 and a low-voltage power terminal 316. The high-voltage power terminal 315 and the low-voltage power terminal 316 are mounted on the front side wall 11 of the housing 1 and are spaced apart from the second electrical portion 33 in the left-right direction. An external interface 102 is provided on the rear side wall 12 of the housing 1. In this manner, the position where the battery pack 100 communicates with the external power supply and the side inspection port 101 are located on the front and rear sides of the battery pack 100 without interfering with each other. When installed on the vehicle 1000, since the power supply and communication portion has a low failure rate, it is placed on the front side and protected within the vehicle body 200, which can further reduce its failure rate.

[0129] The second electrical module 33 is located adjacent to and along the front sidewall 11. The high-voltage terminals 315 of the electrical module 3 output high voltage electricity to the outside of the battery pack 100, providing electrical energy. The low-voltage terminals 316 of the electrical module 3 output low voltage electricity to the outside of the battery pack 100, transmitting signals. The electrical connection structure 31 connects the second electrical module 33, the low-voltage terminals 316, and the high-voltage terminals 315. Installed near the front sidewall 11, this reduces the layout of the electrical connection structure 31 and the cost of electrical connections.

[0130] In some embodiments, as shown in FIG3 , the bottom plate of the housing 1 is a removable bottom guard plate 15, allowing the second electrical component 33 to be removed and installed when the bottom guard plate 15 is removed. The second electrical component 33 can be installed or removed from the housing 1. The bottom plate of the housing 1 is a removable bottom guard plate 15, allowing the second electrical component 33 to be removed and installed when the bottom guard plate 15 is removed. When the second electrical component 33 needs to be repaired, the bottom guard plate 15 is removed from the battery pack 100, and the second electrical component 33 is then removed.

[0131] Specifically, as shown in Figures 22 and 23, the battery pack 100 also includes: a liquid cooling plate 6, which is located below the battery group 2 and the electrical module 3, and a bottom guard plate 15 is detachably connected to the bottom of the liquid cooling plate 6. The liquid cooling plate 6 is provided with a bottom inspection port 61 corresponding to the second electrical part 33, and the bottom guard plate 15 covers the bottom inspection port 61, and the bottom guard plate 15 is used to open and close the bottom inspection port 61.

[0132] The liquid cooling plate 6 is provided with a bottom access opening 61, which is located at the bottom of the battery pack 100 and corresponds to the second electrical section 33. The bottom guard plate 15 covers the bottom access opening 61. The liquid cooling plate 6 is used to cool the battery pack 2 to a safe temperature range.

[0133] A bottom inspection port 61 is provided on the liquid cooling plate 6 , which does not affect the disassembly of the second electrical part 33 , and the liquid cooling plate 6 can be connected to the bottom of the frame 10 at all four edges, further improving the overall structural strength.

[0134] When applied to the vehicle 1000 , the bottom guard plate 15 acts as the bottom plate of the vehicle 1000 on the one hand, and can bear the weight inside the vehicle 1000 ; on the other hand, the bottom guard plate 15 can protect the internal structure of the battery pack 100 and reduce damage.

[0135] Specifically, as shown in Figure 6 , the liquid cooling plate 6 is provided with a liquid flow channel for circulating cooling liquid. A liquid cooling pipe 601 is provided on the liquid cooling plate 6 for flowing liquid in and out. A liquid cooling connector 602 is provided at the end of the liquid cooling pipe 601 for connecting to an external water tank. The liquid cooling connector 602 can be mounted on the frame 10, for example, on the front sidewall 11.

[0136] In some embodiments, the battery pack 100 includes two liquid cooling connectors 602 , which are connected to the liquid inlet 6 - 02 and the liquid outlet 6 - 03 through a liquid cooling pipe 601 , and the two liquid cooling connectors 602 are installed on the front side wall 11 .

[0137] Furthermore, as shown in FIG. 22 , a sealing ring 62 needs to be provided on the periphery of the bottom inspection opening 61 to improve the sealing performance of the bottom inspection opening 61 during use.

[0138] The position of the bottom access opening 61 is relatively flexible. For example, in Figure 22, the liquid cooling plate 6 is provided with a sealing ring 62 arranged around the bottom access opening 61. As shown in Figure 37, the bottom guard plate 15 is provided with a sealing ring 62 arranged around the bottom access opening 61.

[0139] In another embodiment, as shown in FIG22 , the battery pack 100 further includes a bottom access cover 63 covering the bottom access opening 61. The bottom access cover 63 is detachably connected to the liquid cooling plate 6 and is located above the bottom guard plate 15. The bottom access cover 63 protects the internal structure of the battery pack 100 and prevents dust, moisture, etc. from entering the battery pack 100 through the bottom access opening 61.

[0140] Optionally, a sealing ring 62 is provided on the bottom inspection cover 63 and is arranged around the bottom inspection opening 61 to further improve the sealing protection of the bottom inspection opening 61 .

[0141] Furthermore, as shown in FIG37 , the battery pack 100 includes fastening bolts 611 connecting the bottom guard plate 15 and the liquid cooling plate 6. Multiple fastening bolts 611 are distributed around the bottom access opening 61. Tightening the bolts 611 secures the bottom guard plate 15 and the liquid cooling plate 6 at the bottom access opening 61, improving the connection reliability and sealing at the bottom access opening 61.

[0142] In some specific embodiments, as shown in Figures 34 and 35 , the liquid cooling plate 6 of the battery pack is provided with a bottom access port 61 extending through the thickness of the liquid cooling plate 6, and a liquid flow channel 6-01 is provided within the liquid cooling plate 6. A liquid inlet 6-02 and a liquid outlet 6-03 are provided on the upper surface of the liquid cooling plate 6, with the bottom access port 61 located between the liquid inlet 6-02 and the liquid outlet 6-03.

[0143] By providing a bottom inspection port 61 on the liquid cooling plate 6, at least some of the electrical modules 3 of the battery pack 100 can be installed above the bottom inspection port 61. When maintenance is required, the bottom inspection port 61 can be opened for operation, thereby improving the convenience of maintenance operations for the battery pack 100. By arranging the liquid inlet 6-02 and the liquid outlet 6-03 adjacent to the bottom inspection port 61, the liquid cooling pipe 601 needs to be connected above the liquid inlet 6-02 and the liquid outlet 6-03, and at least some of the electrical modules 3 need to be installed above the bottom inspection port 61. In this way, the space here can be compactly arranged without occupying other areas. The area vacant on the liquid cooling plate 6 can be used to arrange the battery pack 20, thereby improving the space utilization rate of the area above the liquid cooling plate 6. Moreover, the liquid inlet 6-02 and the liquid outlet 6-03 are located at both ends of the bottom inspection port 61, and the liquid cooling pipe 601 connected thereto will be arranged adjacent to the electrical module 3. By using the liquid cooling pipe 601, the heat dissipation effect of the electrical module 3 can be improved.

[0144] Specifically, one side of the liquid cooling plate 6 is the connector side 6-04, where the connector side 6-04 is named according to the position of the liquid cooling connector 602 on the battery pack 100, and the side of the liquid cooling plate 6 adjacent to the liquid cooling connector 602 is the connector side 6-04. The bottom inspection port 61 is extended along the connector side 6-04, and the liquid inlet 6-02 and the liquid outlet 6-03 are both arranged adjacent to the connector side 6-04. In other words, the electrical module 3 (such as the second electrical part 33) located above the bottom inspection port 61 is arranged adjacent to the liquid cooling connector 602, so that the side of the shell 1 where the liquid cooling connector 602 is installed does not need to be disassembled and assembled, and the electrical module 3 (such as the second electrical part 33) here only needs to be disassembled and maintained from the bottom, and does not conflict with each other, thereby avoiding the impact on the reliability of the liquid and current when there is a conflict.

[0145] Specifically, the liquid inlet 6-02 is located in the center of the liquid cooling plate 6, and there are two liquid outlets 6-03, located on opposite sides of the liquid inlet 6-02. The liquid inlet 6-02 and one liquid outlet 6-03 are located at either end of the bottom access opening 61 along its length. This allows the coolant to enter from the center and exit from both sides. Heat accumulates in the center of the battery pack 100, so low-temperature liquid enters from the center, improving the cooling effect at the center of the battery pack 100 and thus improving overall temperature uniformity.

[0146] In some embodiments, the partition assembly 5 includes: a partition beam 51, the partition beam 51 extends in the left and right directions, the accommodating chamber V10 includes a front chamber V11 located on one side of the partition beam 51, and the bottom inspection port 61 is located in the front chamber V11.

[0147] The liquid cooling plate 6 is provided with a plurality of first liquid cooling connection holes 6-07, at least some of the first liquid cooling connection holes 6-07 are arranged opposite to the partition beam 51, and the liquid cooling plate 6 is fixedly connected to the partition beam 51 through at least some of the first liquid cooling connection holes 6-07.

[0148] Specifically, a plurality of first liquid cooling avoidance holes 6 - 09 are provided on the liquid cooling plate 6 , and the first liquid cooling avoidance holes 6 - 09 are arranged around the bottom inspection port 61 .

[0149] At least a portion of the first liquid-cooling avoidance holes 6-09 is arranged opposite to the partition beam 51 on one side of the front sub-cavity V11, and the bottom guard plate 15 is detachably connected to the partition beam 51 through at least a portion of the first liquid-cooling avoidance holes 6-09.

[0150] In some optional embodiments, as shown in FIG34 , the liquid cooling plate 6 is provided with at least two rows of first liquid cooling holes 6-07. The two rows of first liquid cooling holes 6-07 are located on either side of the bottom access opening 61. Multiple first liquid cooling holes 6-07 in each row are spaced apart along the long side of the bottom access opening 61. The first liquid cooling holes 6-07 are used to securely connect the liquid cooling plate 6 to the partition assembly 5 of the battery pack 100. This improves the reliability of the connection between the liquid cooling plate 6 and the upper frame 10, particularly on both sides of the electrical module 3, and enhances stability.

[0151] Of course, in the present application, at least one row of second liquid cooling connection holes 6 - 08 is also provided on the liquid cooling plate 6 , which is also used to fix the liquid cooling plate 6 to the frame 10 of the battery pack 100 .

[0152] Furthermore, the liquid cooling plate 6 is provided with at least two rows of first liquid cooling avoidance holes 6-09, two of which are located on either side of the bottom access opening 61. Multiple first liquid cooling avoidance holes 6-09 in each row are spaced apart along the long side of the bottom access opening 61. The diameter of the first liquid cooling avoidance holes 6-09 is larger than the diameter of the first liquid cooling connection holes 6-07. The first liquid cooling avoidance holes 6-09 are used to avoid the fasteners connecting the bottom guard plate 15 of the battery pack 100 to the frame 10. This facilitates the connection of the bottom guard plate 15 or the bottom access cover 63 to the frame 10. The two connections do not conflict, reducing the chance of accidental disassembly during assembly and disassembly.

[0153] Furthermore, the liquid cooling plate 6 is provided with a plurality of first liquid cooling connection holes 6-07 and a plurality of second liquid cooling connection holes 6-08 for fixed connection to the partition assembly 5 and the frame 10. Some of the plurality of first liquid cooling connection holes 6-07 are arranged opposite to the partition cross beam 51 and some are arranged opposite to the partition longitudinal beam 52, and the plurality of second liquid cooling connection holes 6-08 are arranged along the edge of the liquid cooling plate 6.

[0154] Furthermore, the liquid cooling plate 6 is provided with a plurality of first liquid cooling avoidance holes 6-09 and a plurality of second liquid cooling avoidance holes 6-10. The plurality of first liquid cooling avoidance holes 6-09 are arranged around the bottom inspection port 61, and the plurality of second liquid cooling avoidance holes 6-10 are arranged along the edge of the liquid cooling plate 6. The bottom guard plate 15 is detachably connected to the top of the liquid cooling plate 6 through the first liquid cooling avoidance holes 6-09 and the second liquid cooling avoidance holes 6-10.

[0155] In some embodiments, the liquid cooling plate 6 is located at the bottom of the frame 10 , and a bottom inspection port 61 is provided on the liquid cooling plate 6 facing a receiving chamber V10 . The liquid cooling plate 6 is fixedly connected to the frame 10 and at least the partition assembly 5 adjacent to the bottom inspection port 61 .

[0156] In some embodiments, as shown in FIG35 , the liquid flow channel 6-01 includes: a diverter channel 6-11, the diverter channel 6-11 is located in the middle of the liquid cooling plate 6, and the liquid inlet 6-02 is connected to one end of the adjacent joint edge 6-04 of the diverter channel 6-11; the liquid flow channel 6-01 also includes: a return channel 6-12, the return channel 6-12 is two and is located on opposite sides of the diverter channel 6-11, and the two return channels 6-12 extend along opposite sides of the liquid cooling plate 6. , two liquid outlets 6-03 are connected to one end of the adjacent joint edge 6-04 of the two return sub-channels 6-12; the liquid flow channel 6-01 also includes: a heat dissipation sub-channel 6-13, there are multiple heat dissipation sub-channels 6-13, and they are divided into two groups corresponding to the two return sub-channels 6-12, each group of heat dissipation sub-channels 6-13 is connected between the diversion sub-channel 6-11 and the corresponding return sub-channel 6-12, and multiple heat dissipation sub-channels 6-13 are arranged in a one-to-one correspondence with the multiple battery groups 20 in the battery pack 100.

[0157] In some embodiments, as shown in FIG. 33 to FIG. 35 , there are two diverter channels 6 - 11 located on both sides of the separating longitudinal beam 52 , and one end of the two diverter channels 6 - 11 is located in the front chamber V11 to connect to the liquid inlet 6 - 02 .

[0158] In some embodiments, as shown in FIG13 , FIG33 and FIG35 , there are multiple heat dissipation channels 6 - 13 , and they are located on both sides of the partition longitudinal beam 52 . Each heat dissipation channel 6 - 13 is connected to the adjacent diversion channel 6 - 11 and is provided corresponding to an accommodating cavity V10 .

[0159] In some embodiments, as shown in FIG. 33 to FIG. 35 , there are two return flow channels 6 - 12 located on both sides of the separating longitudinal beam 52 , and one end of each return flow channel 6 - 12 located in the front chamber V11 is connected to a liquid outlet 6 - 03 .

[0160] As the name implies, the diverter channel 6-11 is used to divert the coolant. The coolant flowing into the liquid inlet 6-02 is distributed to each heat dissipation channel 6-13 through the diverter channel 6-11. The coolant in each heat dissipation channel 6-13 flows back to the liquid outlet 6-03 through the return channel 6-12.

[0161] In order to improve the cooling effect, the heat dissipation channel 6 - 13 may be S-shaped or have other shapes, and the heat dissipation channel 6 - 13 may have multiple bending sections so that a longer heat dissipation channel 6 - 13 can be arranged in a smaller area.

[0162] Furthermore, the liquid flow channel 6-01 also includes: a first extension channel 6-14, which is located on the side of the bottom inspection port 61 away from the liquid inlet 6-02 and connected to an adjacent return channel 6-12, with a liquid outlet 6-03 located opposite the first extension channel 6-14; a second extension channel 6-15, which is connected to another return channel 6-12 and is bent relative to the return channel 6-12 and extended toward the liquid inlet 6-02, with another liquid outlet 6-03 located opposite the end of the second extension channel 6-15 adjacent to the liquid inlet 6-02. In this way, the first extension channel 6-14 and the second extension channel 6-15 can be used to flexibly position the liquid outlet 6-03, thereby facilitating the arrangement of the liquid cooling pipe 601, ensuring that the liquid cooling pipe 601 can cool the second electrical module 33 while not being too long from the liquid cooling connector 602.

[0163] In some embodiments, as shown in Figures 2, 4, and 6, the frame 10 includes a left side wall 13 and a right side wall 14. The battery pack 2 of the battery pack 100 includes multiple battery groups 20. The battery groups 20 are distributed within the accommodating chamber V10 between two partitioning beams 51. The left battery group 20 is spaced apart from the left side wall 13 to form a circulation channel V101, while the right battery group 20 is spaced apart from the right side wall 14 to form another circulation channel V101. The two return channels 6-12 are located directly below the two circulation channels V101.

[0164] Optionally, as shown in Figures 34 and 35, the liquid cooling plate 6 includes an upper liquid plate 6-05 and a lower liquid plate 6-06, each stacked together. The liquid flow channel 6-01 is formed by the downward deformation of the lower liquid plate 6-06. The upper liquid plate 6-05 is used to close the liquid flow channel 6-01. The liquid inlet 6-02 and the liquid outlet 6-03 are formed on the upper liquid plate 6-05. The lower liquid plate 6-06 is provided with at least one welding hole 6-061, which has a weld point. This facilitates the placement of weld points along the edge of the welding hole 6-061, thereby further strengthening the connection between the upper and lower liquid plates 6-05 and 6-06.

[0165] Further optionally, the welding through hole 6-061 is arranged adjacent to the liquid flow channel 6-01, and the side edges of the liquid flow channel 6-01 adjacent to the welding through hole 6-061 form an avoidance arc edge 6-16, and the avoidance arc edge 6-16 is arranged around the welding through hole 6-061.

[0166] To connect the structure above the bottom guard plate 15.

[0167] Specifically, the upper surface of the bottom guard plate 15 is provided with an upwardly projecting thickened rib 151. The projection of the thickened rib 151 on the liquid cooling plate 6 completely covers the bottom access opening 61. This allows the thickened rib 151 to be squeezed upward after the bottom guard plate 15 is secured to the upper frame 10, thereby tightening the bottom access opening 61 and improving sealing.

[0168] The bottom main board 150 is the main structure of the bottom guard plate 15 and is used to connect to the bottom of the battery pack 100 to provide protection and decoration. By providing a thickened rib 151 on the upper surface of the bottom main board 150, the thickened rib 151 protrudes upward relative to the bottom main board 150 and can support the edge of the bottom inspection port 61 of the battery pack 100. For example, when the battery pack 100 is provided with a liquid cooling plate 6 at the bottom, the liquid cooling plate 6 is provided with a bottom inspection port 61 facing an electrical part (such as the second electrical part 33 described above), and the thickened rib 151 can just support the edge of the bottom inspection port 61 and play a supporting role. Usually, a sealing structure is provided at the edge of the bottom inspection port 61, and the thickened rib 151 will press the sealing structure to improve the sealing effect. Therefore, the bottom guard plate 15 of the present application can improve the sealing reliability around the bottom inspection port 61, thereby improving the sealing protection of the electrical module of the battery pack 100.

[0169] Optionally, the thickened rib 151 is a single part, and the bottom main board 150 is a single part. The thickened rib 151 is connected to the bottom main board 150 by welding or gluing. Therefore, when the bottom guard plate 15 is disassembled and assembled, the thickened rib 151 and the bottom main board 150 are an integrated structure and will not shift, and it helps to improve the sealing effect between the two.

[0170] When the bottom guard plate 15 includes a sealing ring 62, the sealing ring 62 can be placed on the upper surface of the thickened rib 151 and extend along the inner edge of the thickened rib 151. This arrangement facilitates positioning and, when tightening the bottom guard plate 15, presses the sealing ring 62 upward, thereby ensuring the sealing of the edge of the bottom inspection opening 61.

[0171] Furthermore, there are multiple first bottom connecting holes 156, and the multiple first bottom connecting holes 156 are arranged at intervals around the sealing ring 62. In this way, when fasteners are connected at the multiple first bottom connecting holes 156, multiple tightenings form multiple compressions around the sealing ring 62, further improving the sealing effect.

[0172] In some specific embodiments, one side of the thickened rib 151 is flush with one side of the bottom main board 150. It is understood that when the bottom guard plate 15 is connected to the frame 10 of the housing 1, the connection structure at the edge is sealed. By flushing one side of the thickened rib 151 with one side of the bottom main board 150, the upper side of the thickened rib 151 faces one side of the frame 10, and the electrical components facing it are adjacent to the frame 10. On the one hand, the electrical components can be supported and protected by the frame 10, which has a higher structural strength. On the other hand, the structure is concentrated adjacent to the frame 10, increasing the density of the parts arrangement. Moreover, from the outside, after one side of the thickened rib 151 is flush with one side of the bottom main board 150, the connected stacked structure can be observed from the outside, thereby detecting whether any parts are missing.

[0173] In some embodiments, as shown in FIG37 , the bottom guard plate 15 further includes a bottom edge strip 153. The bottom edge strip 153 is superimposed on the bottom main plate 150 and arranged along the edge of the bottom main plate 150. The bottom edge strip 153 is provided with a second bottom connection hole 157 that extends downward through the bottom main plate 150. It is understood that when the battery pack 100 is subjected to an impact, the corners of the battery pack 100 are the most severely impacted and deformed. Therefore, the provision of the bottom edge strip 153 in the present application can enhance the protection and support of the bottom guard plate 15 edge, reducing the risk of the bottom guard plate 15 edge folding or curling due to its thinness during assembly and disassembly. Furthermore, by providing the second bottom connection hole 157 on the bottom edge strip 153, when fasteners are connected to the frame 10 through the second bottom connection hole 157, the bottom edge strip 153 can reduce the probability of the fasteners penetrating the bottom guard plate 15, thereby improving the reliability of the fastener connection at the second bottom connection hole 157.

[0174] Specifically, the thickened rib 151 is located on one side of the bottom main plate 150, and the bottom edge strip 153 is annular in shape, consistent with the edge shape of the bottom main plate 150. The bottom edge strip 153 is provided with an avoidance notch 1531 corresponding to the thickened rib 151. This helps to keep the bottom edge strip 153 flat, avoids an overly complex shape, and reduces the difficulty of sealing.

[0175] Optionally, the height h3 of the bottom edge strip 153 is greater than the height h4 of the thickened rib 151. In other words, the upper surface of the bottom edge strip 153 is higher than the upper surface of the thickened rib 151. This arrangement creates a gap when the bottom cover 15 is attached to the bottom of the housing 1, facilitating the installation of a sealing structure. For example, if a bottom access cover 63 is installed above the thickened rib 151, this gap can accommodate it. Alternatively, if a sealing ring 62 is installed, a thicker one can be used, providing some flexibility in the sealing structure.

[0176] In some optional embodiments, as shown in FIG28 , a shock-absorbing layer 18 may be provided on the upper surface of the bottom guard plate 15 to improve the buffering protection of the internal battery pack 2 and the electrical module 3 .

[0177] In some embodiments, as shown in Figures 13 and 6, a fixing plate 67 is provided within the housing 1 and is positioned above the second electrical section 33. The second electrical section 33 is removably connected to the fixing plate 67 via a fourth bolt 3294. The head of the fourth bolt 3294 is located at the bottom, meaning that the fourth bolt 3294 is installed away from the fixing plate 67 and toward the bottom access opening 61. The projection of the fourth bolt 3294 on the liquid cooling plate 6 is positioned within the bottom access opening 61, allowing the fourth bolt 3294 to be removed or installed through the bottom access opening 61, improving ease of removal or installation.

[0178] As shown in Figures 23 and 24, in some embodiments, the second electrical section 33 includes a second electrical housing 332 for accommodating electrical components. Specifically, the second electrical section 33 also includes a first extension plate 3351, which is connected to at least one side of the second electrical housing 332. The first extension plate 3351 is provided with a mating groove that extends through the side away from the second electrical housing 332. The battery pack 100 also includes a shock-absorbing column 333, which is arranged vertically.

[0179] As shown in Figure 26, the shock-absorbing column 333 includes two thick column sections 3331 and a thin column section 3332 located between the two thick column sections 3331. As shown in Figures 24 and 25, the thin column section 3332 fits within the mating groove, and the two thick column sections 3331 are clamped on the upper and lower sides of the first extension plate 3351. The shock-absorbing column 333 is provided with a center hole 3333, through which the fourth bolt 3294 passes and connects to the fixing plate 67. The provision of the shock-absorbing column 333 not only ensures connection to the fixing plate 67, improving connection reliability, but also absorbs vibrations from the second electrical section 33, thereby protecting the electrical components housed within the second electrical housing 332.

[0180] To facilitate disassembly, the electrical connection structure 31 is electrically connected to the second electrical part 33 via a flexible wiring harness. For example, the second electrical part 33 has a first signal transmission interface 339 as a connector for communication, and the second wiring harness 312 of the electrical connection structure 31 is connected to a second signal transmission interface 3121, and the two are plug-connected.

[0181] As shown in Figure 23, the first signal transmission interface 339 is located at the bottom of the second electrical housing 332. This allows for easy observation of the interface status when the bottom inspection hatch 61 is opened. Specifically, the second signal transmission interface 36 plugs into the first signal transmission interface 339 from the side. This facilitates manual insertion and removal of the second signal transmission interface 36 while also utilizing the weight of the wires to reduce vibration.

[0182] Specifically, the first signal transmission interface 339 is connected to the interior of the second electrical shell 332 via a plurality of fourth flexible wires 331 , so that the second electrical portion 33 can be connected to the electrical connection structure 32 via the first transmission interface 319 .

[0183] In some specific embodiments, as shown in Figure 25 , the second electrical housing 332 of the second electrical section 33 is removably connected to the housing 1. The second electrical section 33 includes a main relay 337, a terminal strip 338, and a first transmission interface 319. The main relay 337 is located within the electrical housing 1. One end of the terminal strip 338 is connected to the main relay 337, while the other end of the terminal strip 338 is located outside the second electrical housing 332. The terminal strip 338 is used to connect to high voltage power, which the main relay 337 controls.

[0184] Specifically, the electrical connection structure 32 includes a copper busbar 317 and a second transmission interface 37. One end of the copper busbar 317 is connected to the other end of the power strip 338 via a fifth bolt 3295. The second signal transmission interface 36 is plugged into the first signal transmission interface 339, thereby achieving electrical connection between the second electrical component 33 and the electrical connection structure 32.

[0185] For example, the copper busbar 317 is long and flexible, with a certain degree of toughness. The connection between the copper busbar 317 and the connection bar 338 is covered with an insulating cover, which is attached to the second electrical housing 332. To remove the second electrical section 33, first power off the second electrical section 33, remove the insulating cover, and release the securing structure between the copper busbar 317 and the connection bar 338. The fifth bolt 3295 can then be loosened. The fourth bolt 3294 can be exposed by unplugging the second transmission interface 37, allowing it to be loosened.

[0186] As shown in Figure 27, in some embodiments, the second electrical part 33 also includes a second extension plate 3352 connected to the second electrical shell 332, and mating hooks 33521 are provided on opposite sides of the second extension plate 3352. There are two first signal transmission interfaces 339, and the two first signal transmission interfaces 36 are located on opposite sides of the second extension plate 1352. Each first signal transmission interface 339 is provided with a mating groove that cooperates with the mating hook 33521, so that the first signal transmission interface 339 can be fixed on the second electrical shell 332. Through the snap-on connection, the connection cost can be reduced and the connection reliability can be improved.

[0187] As shown in FIG. 25 , in some embodiments, two main relays 337 are spaced apart. The bottom of the second electrical housing 332 is formed with downwardly projecting lower convex portions 336 . The two lower convex portions 336 cover the two main relays 337 , respectively. A second through-hole 3361 is defined at the bottom of the second electrical housing 332 adjacent to the two lower convex portions 336 . Part of the fourth flexible conductor 331 extends into the second electrical housing 332 through one second through-hole 3361, while part extends into the second electrical housing 332 through another second through-hole 3361. This allows the second electrical housing 332 to be used to define the placement of the fourth flexible conductor 331 , reducing the likelihood of interference with other components and mitigating adverse effects on the signal.

[0188] 25 and 27 , a side portion of at least one lower protrusion 336 is provided with a wire fastener 3362 for limiting the fourth flexible wire 331. Thus, the movement of the wire fastener 3362 can be restricted, and the swing of the wire fastener 3362 can be reduced.

[0189] In some embodiments, as shown in Figures 28-29, the top cover 16 includes a cover body 161 and seat-securing fasteners 66. The cover body 161 is provided with at least two first mounting holes in a row, located in the middle region of the cover body 161. Seat-securing fasteners 66 are positioned one-to-one in each of the first mounting holes. The lower ends of the seat-securing fasteners 66 are positioned within the frame 10 for securement, while the upper ends of the seat-securing fasteners 66 are used to connect to the seat 300. In other words, the seat-securing fasteners 66 are positioned within the frame 10 and can be directly or indirectly connected to the frame 10. The seat 300 can be connected to the seat-securing fasteners 66 via fasteners. When a force is applied to the seat 300, the force is transferred to the entire battery pack 100, dissipating the impact force.

[0190] With this design, the battery pack 100, once installed in the vehicle body 200, becomes integrated with the vehicle body 200. External impacts on the vehicle body 200 are distributed to various locations, reducing the damage caused by the distributed impact. Furthermore, the battery pack 100 can serve as part of the chassis of the vehicle body 200, significantly reducing the weight of the remaining chassis. Similarly, the roof 16 can serve as part of the floor of the passenger compartment 220, significantly reducing the weight of the remaining floor of the vehicle body 200. This also reduces the number of parts and assembly steps.

[0191] In some specific embodiments, as shown in Figures 28 and 29 , the seat-fixing fastener 66 is provided with a seat-fixing threaded hole 661 extending downward from the upper end. This allows the seat 300 to be connected to the seat-fixing fastener 66 via the threaded fastener. For example, the seat 300 may have a seat bottom beam with through-holes formed in the seat bottom beam. Bolts can be passed through the through-holes from top to bottom and then connected to the seat-fixing threaded hole 661. This design ensures a secure and reliable connection between the battery pack 100 and the seat 300 while also enabling removable assembly.

[0192] Optionally, the seat fixing threaded hole 661 passes through the seat fixing fastener 66 in the up-down direction, thereby reducing the processing difficulty. Of course, it is not ruled out that in some solutions, the bottom of the seat fixing threaded hole 661 is not through, and it is a blind hole.

[0193] Furthermore, as shown in FIG28 , the upper end of the seat fixing fastener 66 is provided with a rotating platform 662 surrounding the seat fixing threaded hole 661 , and the rotating platform 662 is annular.

[0194] Optionally, the inner contour of the rotating platform 662 is a polygon, so that tools (such as screwdrivers, electric wrenches, etc.) can be easily inserted into the rotating platform 662 to drive the seat fixing fasteners 66 to rotate and assemble, thereby improving the assembly efficiency of the rotating platform 662.

[0195] Optionally, the outer contour of the rotating platform 662 is polygonal, which facilitates the use of tools (such as a wrench, electric wrench, etc.) to engage the rotating platform 662 to rotate and assemble the seat fasteners 66, thereby improving the assembly efficiency of the rotating platform 662. In some embodiments, after the seat 300 is installed on the battery pack 100, a tool can be engaged with the rotating platform 662 from the bottom of the seat 300 to tighten or loosen the seat fasteners 66.

[0196] Specifically, the seat fastener 66 also includes a support truncated plate 663, located below the rotating platform 662. The support truncated plate 663 acts as an integral washer on the seat fastener 66, increasing the contact area between the head of the seat fastener 66 and the top cover 16. It also ensures that the pressure exerted on the top cover 16 by the seat fastener 66 during rotation is evenly distributed around the circumference, reducing the risk of concentrated stress around the first assembly hole and tearing of the top cover 16. Furthermore, the rotating platform 662 has a hexagonal outer contour, the circumscribed circle of which has a smaller diameter than the support truncated plate 663. This allows the support truncated plate 663 to separate the tool from the top cover 16 when it engages the outer contour of the rotating platform 662, reducing wear and tear on the top cover 16.

[0197] Further optionally, the outer peripheral surface of the seat fixing fastener 66 is provided with an external thread, and is connected to the inside of the frame 10 by using the external thread, thereby improving assembly efficiency.

[0198] In some embodiments, as shown in FIG29 , the cover body 161 is at least two layers, including a hard plate layer 161a and an insulating buffer layer 161b. The hard plate layer 161a is used to ensure the overall rigidity of the top cover 16, while the buffer layer 161b can achieve buffering protection. Moreover, the use of the buffer layer 161b can be very convenient when performing a sealing connection. The use of insulating material in the buffer layer 161b can improve the internal and external protection of the battery pack 100. Optionally, the hard plate layer 161a is a steel plate layer or other metal layer. Optionally, the buffer layer 161b is a plastic layer, a composite plastic layer, a rubber layer, etc., which is not limited here.

[0199] In some embodiments, as shown in Figures 30-33, the frame 10 is connected in sequence along the length direction by multiple frame side beams 10-1, and finally forms an annular frame, which is called frame 10. Specifically, the front side wall 11 is composed of at least one frame side beam 10-1, the rear side wall 12 is composed of at least one frame side beam 10-1, the left side wall 13 is composed of at least one frame side beam 10-1, and the right side wall 14 is composed of at least one frame side beam 10-1. Each frame side beam 10-1 includes at least two frame parts 10-10 distributed along the height direction, and a closed frame cavity 10-40 is formed in each frame part 10-10. Each frame side beam 10-1 may include two frame parts 10-10, which are stacked in sequence along the height direction. In some solutions, as shown in Figure 30, two adjacent frame parts 10-10 are connected by connecting ribs 10-6. Optionally, the two frame parts 10 - 10 and the connecting ribs 10 - 6 are formed by integrally rolling a steel plate, or the two frame parts 10 - 10 and the connecting ribs 10 - 6 are integrally formed extruded aluminum profiles.

[0200] Each frame side beam 10-1 is formed by integrally rolling a steel plate, or the frame side beam 10-1 is an integrally formed extruded aluminum profile. This makes all the frame parts 10-10 of each frame side beam 10-1, or all the frame parts 10-10 and all the connecting ribs 10-6 continuous, and each side of the frame part 10-10 is rolled or extruded, not formed by stretching an ordinary profile. In this way, on the one hand, welding between the sides of the same frame part 10-10 can be reduced, and welding between two adjacent frame parts can be reduced, thereby reducing the number of processing steps. In addition, the two adjacent frame parts not only have a spliced ​​and stacked positional relationship, but also have a connected side pulling, which makes the integrity stronger and the overall structural strength can be greatly improved.

[0201] Specifically, the connecting rib 10-6 connected between the two frame parts 10-10, in some specific embodiments, a high-voltage power terminal 315 and a low-voltage power terminal 316 are installed on the connecting rib 10-6 of the front side wall 11, and a side inspection port 101 is provided on the connecting rib 10-6 of the rear side wall 12. Furthermore, as shown in FIG31 , the mounting beam 17 is formed by integrally rolling a steel plate, or the mounting beam 17 is an integrally formed extruded aluminum profile. Optionally, the mounting beam 17 includes at least one mounting portion 17-10, and the mounting portion 17-10 includes a mounting cavity 17-40 provided along its length to absorb most of the external force energy, reduce structural vibration, improve the safety of the structure, and also reduce noise.

[0202] In some embodiments, as shown in Figures 3 and 14, specifically, the partition assembly 5 includes at least one partition beam 50, the partition beam 50 includes at least two partition parts 50-10 arranged along the height direction, and a partition cavity 50-40 is formed in the partition part 50-10, and the partition cavity 50-40 extends along the length direction of the partition beam 50.

[0203] Specifically, each partition 50-10 is formed by integrally rolling steel sheets or by integrally forming an extruded aluminum profile. Each side of the partition 50-10 is rolled or extruded, rather than being formed by stretching conventional profiles. This reduces welding between the sides of the same partition 50-10 and between adjacent frame sections, thereby reducing the number of manufacturing steps. Furthermore, adjacent frame sections are not only spliced ​​and stacked, but also have their connecting edges pulled together, enhancing overall integrity and significantly improving overall structural strength.

[0204] In some embodiments, the multiple partition beams 50 of the partition assembly 5 include: at least two partition beams 51, with adjacent partition beams 51 spaced apart in the front-to-back direction, and the battery pack 2 of the battery pack 100 is located between the frontmost partition beam 51 and the rearmost partition beam 51. The accommodating chamber V10 includes at least one of a front chamber V11 and a rear chamber V12.

[0205] When the front compartment V11 is included, it is used to house the electrical module 3 of the battery pack 100. The front compartment V11 is defined by the frontmost dividing beam 51 and the front sidewall 11. When the rear compartment V12 is included, it is used to house the electrical module 3 of the battery pack 100. The rear compartment V12 is defined by the rearmost dividing beam 51 and the rear sidewall 12. In other words, the electronic control unit can be integrated and located in either the front compartment V11 or the rear compartment V12. Alternatively, the electronic control unit can be divided into two parts, each located in the front compartment V11 or the rear compartment V12.

[0206] In some embodiments, the bottom inspection port 61, the liquid inlet 6-02 and the liquid outlet 6-03 of the liquid cooling plate 6 are all located in the front sub-chamber V11.

[0207] In some embodiments, the partition 50 - 10 is a rectangular tube, which facilitates stacking and reduces interference with the battery pack 2 .

[0208] Specifically, the two partitions 50-10 stacked along the height of the partition beam 51 are connected by welding, or fixedly connected by bolts. Alternatively, the two partitions 50-10 are integrally formed by rolling steel plates, or are integrally formed by extruded aluminum profiles.

[0209] In some embodiments, the partition assembly 5 further includes a partition longitudinal beam 52 , and a partition longitudinal beam 52 is connected between each two adjacent partition transverse beams 51 to separate the space between the two adjacent partition transverse beams 51 into two accommodating chambers V10 .

[0210] In some embodiments, the at least one partitioning beam 51 includes a lower beam 511 and an upper beam 512. The lower beam 511 extends in the left-right direction, with its ends connected to the left side wall 13 and the right side wall 14, respectively. The upper beam 512 extends in the left-right direction and is fixedly connected to the upper portion of the lower beam 511. At least two spaced-apart upper beams 512 are connected to the lower beam 511.

[0211] On the same partition beam 51, a first notch 5131 is defined between the upper beam 512 on the left and the left side wall 13, a second notch 5132 is defined between the upper beam 512 on the right and the right side wall 14, a third notch 5133 is defined between two adjacent upper beams 512, and a third notch 5133 is correspondingly provided at the connection between the partition longitudinal beam 52 and the partition beam 51.

[0212] In some embodiments, as shown in FIG30 , the upper crossbeam 512 includes at least one partition 50 - 10 disposed along the height direction, and is formed by rolling a single steel plate, or is an integrally formed extruded aluminum profile. As shown in FIG30 , the lower crossbeam 511 includes at least one partition 50 - 10 disposed along the height direction, and is formed by rolling a single steel plate, or is an integrally formed extruded aluminum profile.

[0213] In some embodiments, the ends of the partitioning longitudinal beams 52 are welded to the lower cross beam 511. This does not affect the notch arrangement, ensures a sufficiently long weld line, and improves welding reliability. The ends of the partitioning cross beams 51 are welded to the frame side beams 10-1 via the straps 54.

[0214] Specifically, the battery group 20 is spaced apart from the partition longitudinal beam 52 , so that the battery group 20 forms a flow channel on the side facing the partition longitudinal beam 52 , which facilitates airflow and high-temperature airflow discharge.

[0215] In some embodiments, each battery group 20 has a first busbar 203. The first busbar 203 of the left battery group 2 extends into the front sub-cavity V11 or the rear sub-cavity V12 through the adjacent first notch 5131, while the first busbar 203 of the right battery group 2 extends into the front sub-cavity V11 or the rear sub-cavity V12 through the adjacent second notch 5132. This ensures a clear and neat positioning of the first busbar 203, which, while allowing for cooling through airflow, also avoids interference with the wiring harness by being located outside the center of the battery pack 100. This results in a neat and orderly electrical connection structure 31, as shown in FIG7 .

[0216] Specifically, as shown in Figure 2 , the battery pack 2 is further provided with a second busbar 204 adjacent to the first electrical section 32. Two second busbars 204 are connected in series with a fuse 3212 to provide voltage reduction protection during high voltage conditions. Specifically, the second busbars 204 are located within the rear compartment V12 and in front of the first BDU module 321.

[0217] Optionally, as shown in Figure 3, at least one of the partitioning beams 51 is provided with a first hanging hole 514 corresponding to the first busbar 203. This allows the first hanging hole 514 to be used to hang the first busbar 203 and the connected structure, improving the structural reliability and stability of the connection. The final partitioning beam 51 is provided with a second hanging hole 515 corresponding to the second busbar 204.

[0218] In some embodiments, the electrical connection structure 31 includes: a first wiring harness 311, located within the rear compartment V12 and surrounding the first electrical portion 32. The first wiring harness 311 is electrically connected to the first busbar 203 of the adjacent battery pack 2, and the first wiring harness 311 and the first electrical portion 32 are detachably connected. A second wiring harness 312, located within the front compartment V11, is detachably connected to the second electrical portion 33, and the second wiring harness 312 is electrically connected to the first busbar 203 of the adjacent battery pack 2. A third wiring harness 313, connected between the first wiring harness 311 and the second wiring harness 312, is positioned above the dividing longitudinal beam 52, and passes through the dividing transverse beam 51.

[0219] The rearmost partition crossbeam 51 is secured with multiple first fasteners 361, which fit over the first wiring harness 311. The frontmost partition crossbeam 51 is secured with multiple second fasteners 362, which fit over the second wiring harness 312. The partition longitudinal beam 52 is secured with multiple third fasteners 363, which fit over the third wiring harness 313.

[0220] Specifically, the partition longitudinal beam 52 is lower than the partition cross beam 51. In this way, when the second wire harness 312 passes through the partition cross beam 51 via the partition longitudinal beam 52, it can be constrained by the partition cross beam 51 to prevent the second wire harness 312 from being too high and interfering with the second protective cover 15. Optionally, the partition longitudinal beam 52 is flush with the lower cross beam 511.

[0221] In some embodiments, the rear sidewall 12 includes a middle section 121 and side sections 122 connected to either side of the middle section 121. The middle section 121 protrudes rearward relative to the side sections 122. The side access opening 101 is located on the middle section 121. The air pressure balance valve 65 is mounted on the side sections 122. A first mounting beam 171 is connected to the middle section 121 outside the housing 1. Second mounting beams 172 are also connected to the left and right side walls 13 and 14 outside the housing 1.

[0222] In some embodiments, as shown in FIG33 , the battery pack 100 further includes an insulating and heat-insulating cover 81 for covering the partition assembly 5 to separate the partition assembly 5 from the battery pack 2. Specifically, a portion of the insulating and heat-insulating cover 81 is attached to the left side wall 11 and the right side wall 12 to separate the left side wall 11 and the right side wall 12 from the battery pack 2.

[0223] A vehicle 1000 according to an embodiment of the present application, as shown in FIG38 , includes a vehicle body 200 and a battery pack 100 according to the above-described embodiment. The structure of the battery pack 100 is not further described. As shown in FIG39 , a passenger compartment 220 is formed within the vehicle body 200, and the battery pack 100 is mounted on the bottom of the vehicle body 200. The use of the battery pack 100 protects the internal structure of the vehicle 1000, enhances the integrated design of the battery pack 100 and the vehicle 1000, reduces the number of parts, and reduces cost and weight. Specifically, the battery pack 100 is mounted on the bottom of the vehicle body 200. The bottom of the vehicle body 200 also forms an upwardly concave upper cavity 240, with the rear end of the battery pack 100 facing the upper cavity 240. This allows maintenance to access the first electrical component 32 within the side inspection port 101 from below through the upper cavity 240, eliminating the need to disassemble the vehicle and minimizing damage to the vehicle. Other structures and operations of the vehicle 1000 according to the embodiment of the present application are known to ordinary technicians in this field and will not be described in detail here.

[0224] In the description of this specification, the description with reference to the terms "embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery pack (100), wherein, Comprising: A frame (10) for enclosing an accommodation cavity (V1); A partition component (5), which is arranged inside the frame (10) to divide the accommodation cavity (V1) into a plurality of accommodation sub-cavities (V10); A liquid cooling plate (6), which is located at the bottom of the frame (10). The liquid cooling plate (6) is provided with a bottom maintenance opening (61) facing one of the accommodation sub-cavities (V10). The liquid cooling plate (6) is fixedly connected to the frame (10) and at least the partition component (5) adjacent to the bottom maintenance opening (61); A bottom guard plate (15), which is detachably connected below the liquid cooling plate (6) for opening and closing the bottom maintenance opening (61).

2. The battery pack (100) according to claim 1, wherein, The partition component (5) includes: a partition cross beam (51), which extends in the left-right direction. The accommodation sub-cavity (V10) includes a front sub-cavity (V11) located on one side of a partition cross beam (51), and the bottom maintenance opening (61) is located in the front sub-cavity (V11); The liquid cooling plate (6) is provided with a plurality of first liquid cooling connection holes (6-07), and at least part of the first liquid cooling connection holes (6-07) are arranged facing the partition cross beam (51). The liquid cooling plate (6) is fixedly connected to the partition cross beam (51) through at least part of the first liquid cooling connection holes (6-07); 3. The battery pack (100) according to claim 2, wherein, The liquid cooling plate (6) is provided with a plurality of first liquid cooling avoidance holes (6-09), and the first liquid cooling avoidance holes (6-09) are arranged around the bottom maintenance opening (61); At least part of the first liquid cooling avoidance holes (6-09) are arranged facing the partition cross beam (51) on one side of the front sub-cavity (V11). The bottom guard plate (15) is detachably connected to the partition cross beam (51) through at least part of the first liquid cooling avoidance holes (6-09); 4. The battery pack (100) according to claim 1, wherein, The frame (10) includes a front side wall (11); The partition component (5) includes: a partition longitudinal beam (52) and at least two partition cross beams (51). Each partition cross beam (51) extends in the left-right direction, and adjacent two partition cross beams (51) are spaced apart in the front-back direction. The partition longitudinal beam (52) extends in the front-back direction, and one partition longitudinal beam (52) is connected between every two adjacent partition cross beams (51) to divide the space between the two adjacent partition cross beams (51) into two accommodation sub-cavities (V10); The frontmost partition cross beam (51) and the front side wall (11) define a front sub-cavity (V11), and the bottom maintenance opening, the liquid inlet (6-02) and the liquid outlet (6-03) of the liquid cooling plate (6) are all located in the front sub-cavity (V11).

5. The battery pack (100) according to claim 4, wherein, The liquid cooling plate (6) is provided with a plurality of first liquid cooling connection holes (6-07) and a plurality of second liquid cooling connection holes (6-08) for fixedly connecting to the partition assembly (5) and the frame (10). Among the plurality of first liquid cooling connection holes (6-07), some are arranged opposite to the partition cross beam (51) and some are arranged opposite to the partition longitudinal beam (52). The plurality of second liquid cooling connection holes (6-08) are arranged along the edge of the liquid cooling plate (6).

6. The battery pack (100) according to claim 5, wherein, The liquid cooling plate (6) is provided with a plurality of first liquid cooling avoidance holes (6-09) and a plurality of second liquid cooling avoidance holes (6-10). The plurality of first liquid cooling avoidance holes (6-09) are arranged around the bottom maintenance opening (61). The plurality of second liquid cooling avoidance holes (6-10) are arranged along the edge of the liquid cooling plate (6). The bottom guard plate (15) is detachably connected above the liquid cooling plate (6) through the first liquid cooling avoidance holes (6-09) and the second liquid cooling avoidance holes (6-10).

7. The battery pack (100) according to any one of claims 4-6, wherein, A liquid flow channel (6-01) is arranged inside the liquid cooling plate (6). The liquid flow channel (6-01) includes: Diversion sub-channels (6-11). There are two diversion sub-channels (6-11), which are located on both sides of the partition longitudinal beam (52). One ends of the two diversion sub-channels (6-11) are both located in the front sub-chamber (V11) to connect to the liquid inlet (6-02). Heat dissipation sub-channels (6-13). There are a plurality of heat dissipation sub-channels (6-13), and they are located on both sides of the partition longitudinal beam (52). Each heat dissipation sub-channel (6-13) is connected to the adjacent diversion sub-channel (6-11) and corresponds to one accommodation sub-chamber (V10).

8. The battery pack (100) according to claim 7, wherein, The liquid flow channel (6-01) further includes: Return sub-channels (6-12). There are two return sub-channels (6-12), and they are located on both sides of the partition longitudinal beam (52). One end of each return sub-channel (6-12) located in the front sub-chamber (V11) is connected to one liquid outlet (6-03).

9. The battery pack (100) according to claim 8, wherein, The frame (10) includes a left side wall (13) and a right side wall (14). The battery pack (100)'s battery pack (2) includes a plurality of battery sub-groups (20). The battery sub-groups (20) are distributed in the accommodation sub-chambers (V10) between the two partition cross beams (51). There is a gap between the left battery sub-group (20) and the left side wall (13) to form a flow channel (V101), and there is a gap between the right battery sub-group (20) and the right side wall (14) to form another flow channel (V101). The two return sub-channels (6-12) are located directly below the two flow channels (V101).

10. The battery pack (100) according to any one of claims 1-9, wherein, The front side wall (11) of the frame (10) is adjacent to the bottom maintenance opening (61). The battery pack (100) further includes: a high-voltage power connection terminal (315) and a low-voltage power connection terminal (316). The high-voltage power connection terminal (315) and the low-voltage power connection terminal (316) are installed on the front side wall (11). The battery pack (100) further includes: two liquid cooling connectors (602), and the two liquid cooling connectors (602) are connected to the liquid inlet (6-02) and the liquid outlet (6-03) of the liquid cooling plate (6) through a liquid cooling pipe (601), and the two liquid cooling connectors (602) are installed on the front side wall (11).

11. The battery pack (100) according to any one of claims 1-10, wherein, The frame (10) includes a rear side wall (12), and a rear partition cavity (V12) is defined between the partition assembly (5) and the rear side wall (12) inside the frame (10); The electrical module (3) of the battery pack (100) includes a first electrical part (32) and a second electrical part (33), the first electrical part (32) is installed in the rear partition cavity (V12), the second electrical part (33) is located above the bottom maintenance opening (61), and a side maintenance opening (101) is provided on the rear side wall (12) opposite to the first electrical part (32).

12. A vehicle (1000), wherein, Comprising: The battery pack (100) according to any one of claims 1-11.

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