Battery pack, vehicle having same

Abstract

The application discloses a battery pack and a vehicle with the same. The battery pack comprises a frame for enclosing a containing cavity; a partition assembly arranged in the frame to divide the containing cavity into multiple containing sub-cavities; a liquid cooling plate located at the bottom of the frame, the liquid cooling plate being provided with a bottom access hole opposite to one containing sub-cavity, and the liquid cooling plate being fixedly connected with the frame and the partition assembly adjacent to the bottom access hole; and a bottom guard plate detachably connected below the liquid cooling plate and used for opening and closing the bottom access hole. According to the battery pack, the liquid cooling plate is fixedly connected with the frame and the partition assembly adjacent to the bottom access hole, and the environment of the electrical module at this position is relatively stable, so that the electrical module is not prone to loosening during long-term operation, and the stability and reliability of the operation environment are improved.

Description

Technical Field

[0001] This invention relates to the field of battery pack technology, and in particular to a liquid cooling plate for a battery pack, a battery pack having the same, and a vehicle. Background Technology

[0002] With the iterative updates of new energy technologies, the technology of battery-vehicle integration is constantly developing. The battery pack is directly integrated into the vehicle chassis, achieving a higher degree of integration. The battery pack includes a frame, a top cover, battery packs, and electrical connection components, with the electrical connection components installed inside the housing.

[0003] A liquid cooling plate is typically installed at the bottom of a battery pack. This plate is usually non-removable. When the electrical modules inside the battery pack need to be disassembled for maintenance, they can only be opened from the side or top. Some designs create a bottom access port on the liquid cooling plate, but this structure is prone to loosening during maintenance, which is detrimental to maintaining a stable operating environment for the electrical modules. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack that, through the rational arrangement of fixed connection positions, enhances the support and protection of the electrical modules, thereby improving operational stability and reliability.

[0005] The present invention also aims to provide a vehicle having the above-described battery pack.

[0006] A battery pack according to an embodiment of the present invention includes: a frame for enclosing a receiving cavity; a partition assembly disposed within the frame to divide the receiving cavity into multiple receiving sub-cavities; a liquid cooling plate located at the bottom of the frame, the liquid cooling plate having a bottom access port opposite one of the receiving sub-cavities, the liquid cooling plate being fixedly connected to the frame and at least the partition assembly adjacent to the bottom access port; and a bottom protective plate detachably connected below the liquid cooling plate for opening and closing the bottom access port.

[0007] According to an embodiment of the present invention, the battery pack allows for partitioning of the frame's internal cavity by setting a separator component, separating the electrical modules and the battery pack. By providing a bottom access port on the liquid cooling plate, at least some of the electrical modules of the battery pack can be installed above the bottom access port, allowing for easy access during maintenance by simply opening the bottom access port, thus improving the convenience of battery pack maintenance. By placing the liquid inlet and outlet near the bottom access port, and requiring connecting pipes above the inlet and outlet, while at least some electrical modules are installed above the bottom access port, this allows for a compact layout, eliminating the need to occupy other areas. The freed-up area on the liquid cooling plate can be used to arrange the battery pack, improving the space utilization of the area above the liquid cooling plate. The liquid cooling pipe connected here is positioned near the electrical modules, improving heat dissipation for the electrical modules. The liquid cooling plate is fixedly connected to the frame and the separator component near the bottom access port, providing a stable environment for the electrical modules and preventing loosening during long-term operation, thus improving the stability and reliability of the operating environment.

[0008] A vehicle according to an embodiment of the present invention includes: the battery pack described in the above embodiments.

[0009] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0010] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 These are overall schematic diagrams of battery packs from some embodiments; Figure 2 This is a schematic diagram of the positional relationship between electrical modules and battery packs in some embodiments from one perspective; Figure 3 This is a schematic diagram of the positional relationship between electrical modules and battery packs in some embodiments, viewed from another perspective. Figure 4 These are exploded views of battery packs from some embodiments, taken from one perspective. Figure 5 These are structural diagrams of the battery pack in some embodiments when components are hidden from view. Figure 6 These are structural diagrams of battery packs from some embodiments, showing components hidden from another view. Figure 7 These are schematic diagrams of the wiring harness structure of electrical modules in some embodiments; Figure 8 These are top views of electrical modules in some embodiments; Figure 9 These are front view schematic diagrams of a portion of the structure of an electrical module in some embodiments; Figure 10 These are schematic diagrams of the battery pack side access cover in some embodiments when it is opened;

[0011] Figure 11 This is a partial structural diagram of the battery pack with the wiring harness hidden and the side access cover opened in some embodiments; Figure 12 These are partial top views of the housing and support frame in some embodiments; Figure 13 These are partial top views of the housing, support frame, and mounting plate of some embodiments; Figure 14 This is a partial structural schematic diagram of the housing, support frame, and mounting plate from another perspective of some embodiments; Figure 15 These are rear view structural diagrams of the housing and support frame in some embodiments; Figure 16 This is a schematic diagram of the assembly structure of the BMS main control board from one perspective in some embodiments; Figure 17 This is a schematic diagram of the assembly structure of the BMS main control board in some embodiments from another perspective; Figure 18 This is a schematic diagram of the assembly structure of the BMS control board from one perspective in some embodiments; Figure 19 This is a schematic diagram of the assembly structure of the BMS control board in some embodiments from another perspective; Figure 20 This is a schematic diagram of the structure of the first BDU module in some embodiments from one viewpoint; Figure 21 This is an exploded view of the first BDU module of some embodiments from another perspective; Figure 22 This is yet another exploded view of the battery pack in some embodiments; Figure 23 yes Figure 22 Enlarged view of a portion of the image; Figure 24 These are schematic diagrams of the structure of the second electrical component in some embodiments; Figure 25 These are exploded views of the second electrical portion of some embodiments; Figure 26 These are structural schematic diagrams of damping columns in some embodiments; Figure 27 These are partial structural diagrams of the second electrical housing in some embodiments; Figure 28 This is a partial view of the seat fasteners assembled on the top cover in some embodiments; Figure 29 These are partial cross-sectional views of the seat fasteners assembled on the top cover in some embodiments; Figure 30 These are cross-sectional views of the housing of a battery pack according to some embodiments; Figure 31 These are cross-sectional views of the frame side beams and mounting beams on the battery pack in other embodiments; Figure 32 This is a partial view of the housing of a battery pack according to some embodiments; Figure 33 This is an exploded view of the housing of a battery pack in some embodiments; Figure 34 These are perspective views of liquid cooling plates in some embodiments;

[0012] Figure 35 These are bottom views of the liquid cooling plates in some embodiments; Figure 36 This is a schematic diagram of the structure of the bottom protective plate and its buffer layer according to some embodiments of the present invention; Figure 37 This is a partial structural diagram of the bottom protective plate according to other embodiments of the present invention; Figure 38 These are overall schematic diagrams of vehicles according to some embodiments; Figure 39 This is a diagram showing the positional relationship of the battery pack within the vehicle body in some embodiments.

[0013] Reference numerals: Vehicle 1000, Battery Pack 100, Housing 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 Protective Plate 15, Bottom Main Board 150, Thickened Rib 151, Bottom Edge Strip 153, Clearance Notch 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 Part 17-10, Mounting Cavity 17-40, Shock Absorbing Layer 18, Side Inspection Port 101, External Interface 102, Frame Side Beam 10-1, Frame Body Part 10-10, Connecting Rib 10-6, Frame Cavity 10-40, First... 1. Fixing hole 111, 2. Battery pack 2, 20. Battery group 20, 201. Battery cell 201, 202. Pressure relief component 202, 203. First busbar 203, 204. Second busbar 204, 3. Electrical module 3, 3. Electrical connection structure 31, 3. First wiring harness 311, 3. First flexible wire 3111, 3. First plug connector 3112, 3. Second flexible wire 3113, 3. Second plug connector 3114, 3. Third flexible wire 3115, 3. Third plug connector 3116, 3. Second wiring harness 312, 3. Second signal transmission interface 3121, 3. Third wiring harness 313, 3. Fourth wiring harness 314, 3. High voltage terminal 315, 3. Low voltage terminal 316, 3. Copper busbar 317, 3. First electrical part 32, 3. First BDU module 321, 3. First electrical housing 3211, 3. First opening 3211a, 3. Second opening 32 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 connector 32131, First conductive sheet 3214, Second conductive sheet 3215, Top cover 3216, First through hole 3216a, Limiting groove 3216b, Limiting protrusion 3216c, First latching part 3216d, Side cover 3217, Second latching part 3217a, Arc panel 3217b, BMS main control board 322, Second connector 3221, BMS slave control board 323, Third connector 3231, Mounting plate 324, Flanged edge 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 conductor 331, second electrical housing 332, shock absorber column 333, thick column section 3331, thin column section 3332, center hole 3333, first outer extension plate 3351, second outer extension plate 3352, mating hook 33521, lower protrusion 336, second through hole 3361, wire fastener 3362, main relay 337, connecting 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 bar 401, second longitudinal bar 402, third longitudinal bar 403, fourth longitudinal bar 404, support crossbar 41, first threaded hole 411, clearance groove 412, partition assembly 5, partition beam 50, partition part 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, mounting plate 54, receiving cavity V1, receiving sub-cavity V10, front sub-cavity V11, rear sub-cavity V12, flow channel V101, width of flow channel x1, 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 Plate 6-06, Welding Through Hole 6-061, First Liquid Cooling Connecting Hole 6-07, Second Liquid Cooling Connecting Hole 6-08, First Liquid Cooling Clearance Hole 6-09, Second Liquid Cooling Clearance 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, Clearance Arc Edge 6-16, Liquid Cooling Pipe 601, Liquid Cooling Connector 602, Bottom Inspection Port 61, Fastening Bolt 611, Sealing Ring 62, Bottom Inspection Cover 63, Side Inspection Cover 64, Air Pressure Balance Valve 65, Seat Fixing Fastener 66, Seat Fixing Threaded Hole 661, Rotary Table 662, Support Frustum 663, Fixing Plate 67, Triangular Reinforcing Plate 68, Insulating and Heat Insulating Cover 81, Vehicle Body 200, Passenger Space 220, Upper Recessed Cavity 240, Seat 300. Detailed Implementation

[0014] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0015] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0016] The battery pack 100 and its constituent structures according to embodiments of the present invention are described below with reference to the accompanying drawings.

[0017] It is understandable that the application fields of the battery pack 100 are not limited, and the installation posture of the battery pack 100 will also be different in different application scenarios. In the description of the structure of the battery pack 100 in this article, in embodiments not involving specific application scenarios, the directional or positional relationships such as "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "longitudinal," "lateral," "length," "width," "thickness," and "height" mentioned are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Specifically, as follows... Figure 1 and Figure 3 In this configuration, the first direction D1 is the front-to-back direction, and the second direction D2 is the left-to-right direction. With the battery pack 100 horizontally positioned, both the first direction D1 and the second direction D2 are perpendicular to the height direction. The height direction of the battery pack 100 is... Figure 1 The vertical direction is shown. Referring to this orientation, in this application, the four sidewalls of the housing 1 are respectively referred to as the front sidewall 11, rear sidewall 12, left sidewall 13, and right sidewall 14. That is, the front sidewall 11 and rear sidewall 12 are two opposite sidewalls of the housing 1 along the first direction D1, and the left sidewall 13 and right sidewall 14 are two opposite sidewalls of the housing 1 along the second direction D2. Additionally, the top cover 16 and bottom cover 15 of the housing 1 are two opposite sidewalls of the housing 1 in the height direction. However, if in another application scenario the battery pack 100 is vertically positioned, the first direction D1 is adaptively adjusted to the vertical direction 32, and the height direction of the battery pack 100 is adaptively adjusted to the horizontal direction. In this case, the names of the sidewalls of the housing 1 remain unchanged, but the actual positions of the sidewalls in this application scenario should be adaptively adjusted. Similar scenarios will not be elaborated further below.

[0018] like Figures 1-6 As shown, the battery pack 100 according to an embodiment of the present invention includes: a housing 1, a battery pack 2, and an electrical module 3.

[0019] The housing 1 of the battery pack 100 includes a frame 10, a top cover 16 and a bottom cover 15. The frame 10 encloses the receiving cavity V1 of the housing 1. The top cover 16 and the bottom cover 15 are connected to the upper and lower ends of the frame 10 to close the receiving cavity V1.

[0020] In some embodiments, such as Figure 5 , Figure 6 and Figure 12 , Figure 13As shown, the battery pack 100 also includes a partition component 5 disposed in the housing 1. The partition component 5 is disposed in the housing 1 to divide the housing cavity V1 into multiple housing sub-cavities V10, so that the battery pack 2 and the electronic control structure can be placed in different housing sub-cavities V10.

[0021] Battery pack 2 is located inside housing 1, and electrical module 3 is also installed inside housing 1. Battery pack 2 includes multiple battery cells 201, which are connected in series and parallel to provide the required voltage and current.

[0022] The electrical module 3 includes an electrical connection structure 31 and an electrical control structure. The electrical control structure is responsible for the 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 the various parts inside the battery pack 100.

[0023] In some embodiments, the electronic control structure is integrated as a single unit, occupying one position within the battery pack 100. In other embodiments, the electronic control structure includes a first electrical part 32 and a second electrical part 33, i.e., the electronic control structure is separately configured, occupying different positions within the battery pack 100, and the electrical connection structure 31 is used for electrical connection with the first electrical part 32, the second electrical part 33, and the battery pack 2.

[0024] The electrical module 3 has power terminals for connecting to the external environment for charging / discharging and communication. These terminals include a high-voltage terminal 315 and a low-voltage terminal 316, both 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, and it can also be used for charging the battery pack 100 itself. The low-voltage terminal 316 serves as the information terminal for communication between the battery pack 100 and the outside world.

[0025] It should be noted that the descriptions of "high voltage" and "low voltage" in this article do not limit their specific voltage values, but rather define their relative values. The high voltage value is typically the supply voltage of the battery pack 100 as a power source, while the low voltage value is typically the signal transmission voltage within the battery pack 100.

[0026] In existing technologies, the electrical modules of a battery pack include a BDU (Battery Disconnect Unit) and a BMS (Battery Management System). The BDU uses the BMS to control high-voltage switching and safety protection functions. In practical applications, the electrical modules are concentrated on one side of the battery pack, and long busbars are used to achieve electrical connections within the battery pack, with at least three long busbars.

[0027] This application divides the electrical module 3 into a first electrical part 32 and a second electrical part 33, which can reduce the circuit connections that run through the front and back of the battery pack 100, thereby reducing the application cost of electrical connections and the weight of the battery pack 100, and optimizing the electrical layout within the battery pack 100.

[0028] According to an embodiment of the present invention, the battery pack 100, by setting the electrical module 3 as a first electrical part 32 and a second electrical part 33, facilitates the electrical layout within the battery pack 100 and optimizes the spatial arrangement of the electrical module 3 within the battery pack 100. In the prior art, the space occupied by the electrical module within 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 within the housing, the size of the housing needs to be increased, which also increases the size of the entire battery pack, reducing the utilization rate of the internal space of the battery pack. In this application, the optimized design facilitates the reduction of the height of the electrical module 3, for example, making the height dimension of the battery pack 2 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 document refers to the part in the height direction (i.e., Figure 1 The dimensions in the vertical direction (as shown in D1).

[0029] Specifically, the battery pack 2, the first electrical component 32, and the second electrical component 33 are located within different accommodating cavities V10. Further, 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 within different accommodating cavities V10, and the battery groups 20, the first electrical component 32, and the second electrical component 33 are located within different accommodating cavities V10. In some embodiments, the accommodating cavity V10 includes a front cavity V11 for accommodating the second electrical component 33. The accommodating cavity V10 includes a rear cavity V12 for accommodating the first electrical component 32.

[0030] Specifically, the shape of the frame 10 typically determines the overall shape of the battery pack 100. The frame 10 can be a square or hexagonal frame, etc. A common shape for the frame 10 is quadrilateral. Specifically, the frame 10 is formed by connecting multiple frame side beams 10-1 sequentially, with each side beam 10-1 forming one side wall of the housing 1. When the frame 10 is rectangular, the four sides of the rectangle form the front side wall 11, rear side wall 12, left side wall 13, and right side wall 14 of the housing 1. Furthermore, the housing 1 also includes mounting beams 17 connected to the frame 10. The mounting beams 17 can be installed on the frame side beams 10-1, for example, on the front side wall 11, rear side wall 12, left side wall 13, and right side wall 14. Even further, during battery pack 100 assembly, the frame side beams 10-1 of the frame 10 are connected to the top cover 16 and bottom protective plate 15 by bolts to improve connection reliability.

[0031] Optionally, during assembly, the top of the battery pack 2 is directly glued to the top cover 16, making them an inseparable unit. Optionally, during assembly, the bottom of the battery pack 2 is directly glued to the bottom protective plate 15, making them an inseparable unit. Of course, the solution of this application is not limited to this. The bottom protective plate 15 can also be provided 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 provided as a detachable connection structure to facilitate the disassembly and maintenance of the battery pack 100 from the top. In some solutions, the top of the battery pack 2 and the top cover 16 are not in direct contact, but are separated by an insulating and heat-insulating layer, and are glued together through the insulating and heat-insulating layer, thereby blocking the upward heat transfer of the battery pack 2.

[0032] In some embodiments, a side access port 101 is provided on the side wall of the housing 1, and the first electrical component 32 is disposed directly opposite the side access port 101. For example, if a side access port 101 is provided on the rear side wall 12, the first electrical component 32 is located on the rear side of the battery pack 2 and is disposed directly opposite the side access port 101. The provision of the side access port 101 when the battery pack 100 is applied to the vehicle 1000 can adapt to the shape of the vehicle 1000. When an upper recess 240 is provided at the bottom of the vehicle 1000 (e.g.) Figure 38 and Figure 39 As shown), this sidewall of the housing 1 is spaced apart from the sidewall of the upper recess 240. For example... Figure 39 In the middle, the upper concave cavity 240 provides space behind the side inspection port 101, allowing the side inspection port 101 of the battery pack 100 to be opened from below the vehicle 1000 for maintenance of the first electrical component 32.

[0033] In some embodiments, the second electrical portion 33 is located on the front side of the battery pack 2. In some specific embodiments, such as Figures 6-8As shown, the first electrical section 32 includes a BMS main 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 main control board 322 and the BMS slave control board 323. Further, as... Figure 9 As shown, the second electrical part 33 includes a second BDU module.

[0034] Specifically, the BMS main control board 322 and the BMS slave control board 323, in conjunction with the first BDU module 321 and the second BDU module, realize the functions of high voltage switching and safety protection. The BMS main control board 322 and the BMS slave control board 323 are connected via a wiring harness in the electrical connection structure 31. The BMS main control board 322 and the BMS slave control board 323 are also connected to the first BDU module 321 and the second BDU module via the wiring harness in 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 sequentially along the second direction D2. The wiring harness portion of the electrical connection structure 31 is as follows... Figure 7 As shown, it includes multiple wire harnesses.

[0035] Here, the first BDU module 321 is placed between the BMS main control board 322 and the BMS slave control board 323, which facilitates the central positioning of the first BDU module 321 and ensures a symmetrical connection between the first BDU module 321 and the battery pack 2. When voltage division protection of the battery pack 2 is required, the first BDU module 321 and the two battery groups 20 of the battery pack 2 are symmetrical, facilitating voltage balance.

[0036] Specifically, the BMS main control board 322 and the BMS slave control board 323 are detachable via the side inspection port 101. It is understandable that the BMS main control board 322 and the BMS slave control board 323 have a higher failure rate in terms of failure frequency. Therefore, they are set to be detachable to facilitate direct removal for maintenance and inspection in case of failure.

[0037] For example, in the first electrical module 3, the BMS slave control board 323 includes at least one, which can collect and transmit data of individual battery cells in the battery pack 2, and transmit the data 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 individual battery cells 201 in the battery pack 2.

[0038] Specifically, the BMS slave control board 323 comprises two boards, which are stacked along the height direction. The dimensions of each BMS slave control board 323 are 86.5 mm in the first direction D1, 240 mm in the second direction D2, and 19.7 mm in height. The stacked height of the two BMS slave control boards 323 is 48.7 mm. The BMS master control board 322 has a dimension of 102 mm in the first direction D1, a dimension of 260 mm in the second direction, and a height of 24 mm. The first BDU module 321 has a dimension of 103 mm in the first direction D1, a dimension of 153 mm in the second direction D2, and a height of 85.5 mm. Along the second direction D2, the total dimension of the BMS slave control board 323, the BMS master control board 322, and the first BDU module 321 in the first electrical section 321 is at least 653 mm.

[0039] Combination Figure 10 and Figure 11 As shown, the height of both the first electrical component 321 and the second electrical component 302 is lower than that of the battery pack 2.

[0040] In some specific embodiments, such as Figure 17 , Figure 18 and Figure 11 As shown, the BMS slave control panels 323 are arranged along the left-right direction, and there are at least two BMS slave control panels 323 stacked along the height direction. The projections of all BMS slave control panels 323 on the rear side wall 12 are completely within the side access port 101. This allows the BMS slave control panels 323 to be pulled out horizontally during disassembly and assembly, reducing the risk of bumps caused by tilting. Moreover, when the side access port 101 is open, the status of the BMS slave control panels 323 can be observed more intuitively even without removing them.

[0041] like Figure 18 , Figure 19 and Figure 11 As shown, the BMS main control board 322 is positioned along the left-right direction, and its projection on the rear side wall 12 is entirely within the side inspection port 101. This allows the BMS main control board 322 to be pulled out horizontally during disassembly and assembly, reducing the risk of impact when tilted. Furthermore, when the side inspection port 101 is open, the status of the BMS slave control board 323 can be observed more directly even without removing the BMS main control board 322.

[0042] In some embodiments, such as Figures 12-14As shown, the battery pack 100 also includes a support frame 4, which is located inside the housing 1. The first electrical component 32 is mounted on the support frame 4. The support frame 4 provides support to the first electrical component 32, reducing the shaking of the first electrical component 32 during the movement of the battery pack 100, thereby improving the safety of the battery pack 100. In addition, the support frame 4 can also raise the first electrical component 32, making it easier to face the side inspection port 101.

[0043] Specifically, the support frame 4 is located within the rear compartment 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 to the partition beam 51 and the rear sidewall 12, respectively, or welded to them.

[0044] The support frame 4 has multiple first threaded holes 411 on one side of the inspection port 101 facing the side, and the multiple 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 by bolts, and are connected to the first threaded holes 411 for easy disassembly and assembly.

[0045] In some embodiments, such as Figures 16-19 As shown, the first electrical component 32 includes two mounting plates 324. The BMS main control board 322 and the BMS slave control board 323 are respectively mounted on their respective mounting plates 324. The mounting plates 324 are fixed to the housing 1 by first bolts 3291. The first bolts 3291 are arranged in the front-rear direction, with the head of the first bolts 3291 located at the rear end. The projection of the first bolts 3291 on the rear side wall 12 is located within the side inspection port 101.

[0046] Specifically, such as Figure 16 As shown, the BMS main control board 322 is connected to a mounting plate 324, for example, by means of vertically arranged bolts. Specifically, as... Figure 18 As shown, the BMS is connected from the control board 323 to another mounting plate 324, for example, by means of vertically arranged bolts. Specifically, as... Figure 13 and Figure 14 As shown, during assembly, a mounting plate 324 with a BMS main control board 322 or a BMS slave control board 323 is placed on a support frame 4, and a downwardly extending flange 3241 is formed on the side of the mounting plate 324 facing the side access port 101. Figures 16-19 As shown, the flange 3241 is provided with a mounting hole 3242 corresponding to the first threaded hole 411, and the first bolt 34 passes through the mounting hole 3242 and the first threaded hole 411 in sequence to fix it.

[0047] like Figures 12-14As shown, the support frame 4 includes four support crossbars 41 distributed along the first direction D1. Each support crossbar 41 extends along the second direction D2. Two support crossbars 41 are close to the side access port 101, and the other two support crossbars 41 are away from the side access port 101. Each support crossbar 41 is provided with a first threaded hole 411, and the support crossbar 41 close to the side access port 101 is provided with a relief groove 412, which corresponds to the first threaded hole 411 away from the side access port 101.

[0048] The mounting plate 324 has two flanges 3241 distributed along the first direction D1, and each flange 3241 has a mounting hole 3242. The mounting plate 324 is placed on the support frame 4. The side of the mounting plate 324 facing the side access port 101 forms a downward extending flange 3241. The flange 3241 has a mounting hole 3242 corresponding to the first threaded hole 411. The first bolt 34 can pass through the mounting hole 3242 and the first threaded hole 411 in sequence to fix the mounting plate 324 to the support frame 4. Furthermore, the first bolt 34 is set on the support frame 4 along the second direction D2, which can reduce interference during assembly and disassembly and improve the efficiency of installation or disassembly. In addition, the flange 3241 can also position the mounting plate 324 and assist in fixing the mounting plate 324 and the support frame 4. The flange 3241 of the mounting plate 324 faces the side inspection port 101 and extends downward. The flange 3241 is a single long strip, and a mounting hole 3242 is provided at the position corresponding to the first threaded hole 411. Alternatively, the flange 3241 is a long strip with a relief groove 412, and the flange 3241 is respectively provided at the corresponding positions of the first threaded hole 411.

[0049] In some specific embodiments, such as Figure 12 and Figure 13 As shown, the support frame 4 also includes four support longitudinal bars 40, each extending along the first direction D1. The four support longitudinal bars 40 are respectively arranged as a first longitudinal bar 401, a second longitudinal bar 402, a third longitudinal bar 403, and a fourth longitudinal bar 404. A support crossbar 41 connects the first longitudinal bar 401 and the second longitudinal bar 402, and a support crossbar 41 connects the third longitudinal bar 403 and the fourth longitudinal bar 404.

[0050] The first electrical component 32 includes two detachable components, which are respectively located on the support crossbars 41 on both sides. Thus, the support longitudinal bar 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 support bars 40 and support crossbars 41, compared to configuring the support frame 4 as a single support plate, on the one hand, the support bars 40 are lighter, meeting structural strength requirements while reducing the overall weight of the battery pack 100; on the other hand, the manufacturing process of the support bars 40 is simpler, 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.

[0051] Specifically, a supporting crossbar 41 connects the first vertical bar 401 and the second vertical bar 402. There are two supporting crossbars 41, arranged along a first direction D1, each including a mounting hole 3242. The supporting crossbar 41 closer to the front of the first direction D1 is the first supporting crossbar, and the supporting crossbar 41 closer to the rear of the first direction D1 is the second supporting crossbar. The height of the second supporting crossbar is greater than that of the first supporting crossbar 41, and the mounting hole 3242 on the second supporting crossbar is fully exposed. At the mounting hole 3242, the heights of the first and second supporting crossbars are the same.

[0052] In some alternative embodiments, such as Figure 32 As shown, to improve the support stability of the support frame 4, the housing 1 also includes a triangular reinforcing plate 68. The two right-angled sides of the triangular reinforcing plate 68 are respectively connected to the support frame 4 and the adjacent partition beam 51. Utilizing the triangular stability of a triangle, the support strength and connection reliability of the support frame 4 and the adjacent partition beam 51 are improved. Optionally, the triangular reinforcing plate 68 is welded to the support frame 4. Optionally, the triangular reinforcing plate 68 is welded to the partition beam 51.

[0053] Furthermore, the BMS slave control board 323 is detachably connected to the first longitudinal bar 401 and the second longitudinal bar 402 via a mounting plate 324, and the BMS master control board 322 is detachably connected to the third longitudinal bar 403 and the fourth longitudinal bar 404 via another mounting plate 324. Using the supporting longitudinal bars 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.

[0054] Furthermore, the first BDU module 321 can be mounted on the second longitudinal bar 402 and the third longitudinal bar 403. For example, the first BDU module 321 includes a first electrical housing 3011, which is connected to the second longitudinal bar 402 and the third longitudinal bar 403 by vertically arranged bolts.

[0055] In some embodiments, such as Figure 10 , Figure 20 , Figure 21 As shown, 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 on its rear side, and the fuse 3212 is detachably disposed within the first electrical housing 3211. Specifically, the fuse 3013 is detachably connected to the first electrical housing 3011. After the electrical connection is cut off in the event of a battery pack 100 failure, the fuse 3013 needs to be replaced or manually reset.

[0056] Specifically, the first BDU module 321 also includes a side cover 3217, which is detachably sealed to the first opening 3211a. By providing the first electrical housing 3211 and the side cover 3217, the internal electrical components of the first BDU module 321, such as the fuse 3212, can be protected. Furthermore, the internal electrical components, such as the fuse 3212, are housed within the first electrical housing 3211, facilitating their fixation and installation, and improving the convenience and reliability of the fixed connection. Further, as... Figure 21 As shown, the side cover 3217 has a second latching part 3217a at both ends, and the side cover 3217 can be latched to the first electrical housing 3211 through the second latching part 3217a.

[0057] In some specific embodiments, such as Figure 21 As shown, the side cover 3217 includes an arc-shaped panel 3217b located between the second latching portions 3217a on both sides. Its shape is adapted to the fuse 3212, improving compactness and constraint on the fuse 3212. The arc-shaped panel 3217b can be a circular arc plate; alternatively, it can be a grid plate to improve heat dissipation. The connection structure of the second latching portions 3217a improves the stability and convenience of the connection. By setting the side cover 3217 as a circular arc-shaped grid plate, the structural strength of the side cover 3217 can be improved.

[0058] Specifically, the first BDU module 321 further includes a current sensor 3213, which is connected in series with the fuse 3212. The current sensor 3213 is detachably disposed within the first electrical housing 3211. In this way, the current sensor 3213 can detect the current passing through the fuse 3212 in a timely manner, enabling the BMS slave control board 323 to determine in a timely manner whether the fuse 3212 needs to be blown.

[0059] Here, the internal circuit structure and specific working principle of the fuse 3212, current sensor 3213, BMS main control board 322, and BMS slave control board 323 are all existing technologies and will not be described in detail here.

[0060] Specifically, such as Figure 21As shown, the fuse 3212 is fixed to the first electrical housing 3211 by the second bolt 3292. The head of the second bolt 3292 is set towards the side access port 101. The projection of the second bolt 3292 on the rear side wall 12 is located inside the side access port 101, thereby improving the reliability and stability of the fuse 3212 connected to the first electrical housing 1.

[0061] When the fuse 3212 fails and needs to be replaced, first unlock the second latch 3217a to detach the side cover 3217 from the first electrical housing 3211 and expose the second bolt 3292. Then unscrew the second bolt 3292 to release the fixed connection between the fuse 3212 and the first electrical housing 3211. Finally, remove the faulty fuse 3212 through the side inspection port 101.

[0062] Similarly, the current sensor 3213 is fixed to the first electrical housing 3211 by the third bolt 3293. The head of the third bolt 3293 is set towards the side access port 101. The projection of the third bolt 3293 on the rear side wall 12 is all located inside the side access port 101, thereby improving the reliability and stability of the current sensor 3213 connected to the first electrical housing 1.

[0063] When the current sensor 3213 fails and needs to be replaced, first unlock the second latch 3217a to detach the side cover 3217 from the first electrical housing 3211 and 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 housing 3211. Finally, remove the faulty current sensor 3213 through the side inspection port 101.

[0064] In some embodiments, such as Figure 21 As shown, the first electrical housing 3211 has a first positioning cavity 3211e and a second positioning cavity 3211h that open towards the side inspection port 101. The fuse 3212 is located in the first positioning cavity 3211e, and the current sensor 3213 is located in the second positioning cavity 3211h. In this way, the fuse 3212 and the current sensor 3213 are positioned separately using the first positioning cavity 3211e and the second positioning cavity 3211h, which facilitates assembly.

[0065] Specifically, a first positioning boss 3211c is formed on at least one side of the first positioning cavity 3211e within 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, minimizing obstruction to the fuse 3212.

[0066] A second positioning boss 3211f is formed on at least one side of the second positioning cavity 3211h within the first electrical housing 3211, and 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, minimizing obstruction to the current sensor 3213.

[0067] Furthermore, both the first positioning boss 3211c and the second positioning boss 3211f have threaded holes on their surfaces facing the side inspection port 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 connections are convenient, quick, and do not obstruct the view.

[0068] In some specific embodiments, such as Figure 21 As shown, the first electrical housing 3211 has two first positioning bosses 3211c. The rear surface of the first positioning bosses 3211c has a second threaded hole 3211d. The two first positioning bosses 3211c define a first positioning cavity 3211e. The fuse 3212 is located in the first positioning cavity 3211e. The two ends of the fuse 3212 are connected to the two first positioning bosses 3211c by second bolts 3292. Each second bolt 3292 is threaded into the second threaded hole 3211d.

[0069] The first electrical housing 3211 is provided with two second positioning bosses 3211f. The rear surface of the second positioning bosses 3211f is provided with a third threaded hole 3211g. The two second positioning bosses 3211f define a second positioning cavity 3211h. The current sensor 3213 is located in the second positioning cavity 3211h. The two ends of the current sensor 3213 are connected to the two second positioning bosses 3211f by third bolts 3293. Each third bolt 3293 is threaded into the third threaded hole 3211g.

[0070] This allows for accurate positioning of both the fuse 3212 and the current sensor 3213, and also contributes to a more compact structure.

[0071] Optionally, the first positioning boss 3211c and the second positioning boss 3211f are staggered in height and are at different distances from the side inspection port 101.

[0072] Furthermore, two first positioning bosses 3211c are arranged in the left-right direction, and two second positioning bosses 3211f are arranged in the left-right direction. The two second positioning bosses 3211f are at different heights from the two first positioning bosses 3211c, and the rear surfaces of the first positioning bosses 3211c and the second positioning bosses 3211f are staggered in the front-back direction. This arrangement allows the fuse 3212 and current sensor 3213 to be staggered during assembly and disassembly, which helps to reduce the size of the first BDU module 321 in both the height and front-back directions.

[0073] Specifically, the first positioning boss 3211c is located below the second positioning boss 3211f, thus the fuse 3212 is installed below the current sensor 3213. Furthermore, the fuse 3212 is located behind the current sensor 3213, closer to the side access port 101. From a failure frequency perspective, this arrangement makes the fuse 3212, which has a higher failure rate, easier to remove.

[0074] Advantageously, such as Figure 21 As shown, the first BDU module 321 also includes a first conductive piece 3214. The first conductive piece 3214 is located in the first positioning cavity 3211e and on the side of the fuse 3212 away from the side inspection port 101. One end of the first conductive piece 3214 is pressed on the side of the fuse 3212 away from the side inspection port 101, and the other end is pressed on the side of the current sensor 3213 away from the side inspection port 101. Thus, the first conductive piece 3214 connects the fuse 3212 and the current sensor 3213 in series, and does not affect the observation and disassembly of the two through the side inspection port 101.

[0075] In some specific embodiments, such as Figure 21 As shown, 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 a 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 and then bends to connect to the first positioning boss 3211c for electrical connection with the fuse 3212. A portion of the upper edge of the first conductive sheet 3214 extends upward and then bends to connect to another second positioning boss 3211f for electrical connection with the current sensor 3213.

[0076] This configuration utilizes the first conductive piece 3214 to connect the fuse 3212 and the current sensor 3213 in series. Furthermore, the first conductive piece 3214 is not easily detached, ensuring high reliability. The width of the first conductive piece 3214 can be set to be relatively large, which is beneficial for reducing resistance, etc.

[0077] Specifically, such as Figure 21 As shown, 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, which are spaced apart on the top of the first electrical housing 3211, and each second conductive plate 3215 extends in the front-back direction.

[0078] One of the second conductive pieces 3215 has its rear end bent downwards and rests on a first positioning boss 3211c, and is electrically connected to a fuse 3212. The rear end of the other second conductive piece 3215 is bent downwards and rests on a second positioning boss 3211f, and is electrically connected to a current sensor 3213. The front ends of the two second conductive pieces 3215 are respectively connected to the battery pack 2 via copper busbars 317. A top cover 3216 is detachably connected to the top of the first electrical housing 3211 and covers the two second conductive pieces 3215.

[0079] The top cover 3216 not only facilitates disassembly, assembly, and maintenance, but also provides a certain degree of positional constraint on the second conductive piece 3215. This design ensures high power connection reliability and allows for more flexible component replacement.

[0080] Optionally, such as Figure 20 and Figure 21 As shown, the current sensor 3213 has a first connector 32131 on the rear side, and the top cover 3216 has a first through hole 3216a facing the first connector 32131.

[0081] like Figure 7 and Figure 8 As shown, the electrical connection structure 31 includes: a first flexible wire 3111 located on the rear side of the first BDU module 321, the end of the first flexible wire 3111 is provided with a first plug connector 3112, and the first plug connector 3112 is plugged into the first plug interface 32131 through the first through hole 3216a.

[0082] This allows for easy disassembly and assembly, with the first connector 3112 simply disconnected from the side inspection port 101. The first flexible wire 3111 can then be disconnected, allowing for inspection or disassembly of the internal structure of the first BDU module 321. Once assembled, the first connector 3112 can be directly inserted from the rear, making assembly very convenient and reducing interference from tangled wires.

[0083] Optionally, such as Figure 20 and Figure 21As shown, the top surface of the top cover 3216 is provided with a limiting groove 3216b extending forward and backward. The front end of the limiting groove 3216b is positioned directly opposite the first through hole 3216a, and a portion of the first flexible conductor 3111 is located within the limiting groove 3216b. The limiting groove 3216b can constrain the first flexible conductor 3111, reducing the shaking of the first flexible conductor 3111 during vibration and reducing the probability of loosening due to shaking. Moreover, compared with other conductors, the first flexible conductor 3111 is thinner and lighter, which can improve the connection reliability and enhance the safety of the battery pack 100.

[0084] Optionally, the top cover 3216 may also have a limiting protrusion 3216c on at least one side of the limiting groove 3216b, which can further constrain the first flexible conductor 3111 and improve its safety in use. Further, as... Figure 21 As shown, the top cover 3216 is provided with two limiting protrusions 3216c, and the two limiting protrusions 3216c form barbs at the ends to facilitate hooking the first flexible wire 3111.

[0085] Furthermore, such as Figure 21 As shown, the top cover 3216 has first latching portions 3216d at both ends, and the top cover 3216 can be latched onto the first electrical housing 3211 through the first latching portions 3216d. By setting the connection structure of the first latching portions 3216d, the stability and convenience of the connection are improved.

[0086] In some embodiments, such as Figure 7 , Figure 8 and Figure 10 As shown, the BMS main control board 322 has a second connector 3221 on its rear side, and the BMS slave control board 323 has a third connector 3231 on its rear side. The electrical connection structure 31 also includes a second flexible wire 3113 located on the rear side of the BMS main control board 322, and a second connector 3114 at the end of the second flexible wire 3113, which fits into the second connector 3221.

[0087] The electrical connection structure 31 also includes a third flexible wire 3115 located on the rear side of the BMS slave control board 323, the end of the third flexible wire 3115 is provided with a third plug connector 3116, and the third plug connector 3116 is fitted into the third plug interface 3231.

[0088] This configuration allows for direct disconnection of the second connector 3114 and the third connector 3116 from the side inspection port 101 during assembly and disassembly. Disconnecting the second flexible wire 3113 allows for inspection or disassembly of the BMS main control board 322. Disconnecting the third flexible wire 3115 allows for inspection or disassembly of the BMS slave control board 323.

[0089] Once assembled, the second connector 3114 and the third connector 3116 can be directly inserted from the rear, making assembly very convenient and reducing interference from tangled wires.

[0090] like Figure 6 and Figure 8 As shown, in some embodiments, the electrical connection structure 31 includes a first wiring harness 311, which surrounds the first electrical part 31 and is electrically connected to the battery pack 2. The first wiring harness 311 has connectors that are respectively inserted into the BMS main control board 302, the BMS slave control board 303, and the first BDU module 321. These connectors are located on the side of the first electrical part 31 facing the side access port 101. The fact that the first wiring harness 311 surrounds the first electrical part 31 allows for changing the insertion direction of the connectors on the first wiring harness 311, directing the connectors towards the side access port 101. This makes it easier to open the first wiring harness 311 through the side access port 101, further improving the convenience of maintenance.

[0091] Specifically, the first flexible conductor 3111, the second flexible conductor 3113, and the third flexible conductor 3115 are all led out from the first wire harness 311.

[0092] Specifically, the first wire harness 311 is provided with a plurality of wire harness clips spaced apart along the extension direction of the first wire harness 311, and the wire harness clips are oriented towards the side inspection port 101 for installation and removal. The multiple wire harness clips can fix the first wire harness 311, reduce the swing of the first wire harness 311 and reduce the probability of the plug-in connectors on the first wire harness 311 being loose.

[0093] In some embodiments, such as Figure 1 and Figure 3 As shown, the battery pack 100 also includes a side access cover 64, which can cover the side access port 101 and is detachably connected to the rear side wall 12. The side access cover 64 can protect the internal structure of the battery pack 100 and prevent dust, moisture, etc. from entering the battery pack 100 through the side access port 101.

[0094] Specifically, such as Figure 15 As shown, the rear sidewall 12 has a plurality of first fixing holes 111, which are arranged at intervals along the circumference of the side access port 101. The side access cover 64 can cover the side access port 101, and the side access cover 64 includes a plurality of through holes corresponding to the positions of the first fixing holes 111. The first fixing holes 111 and the through holes are connected by fasteners to improve the stability of the connection.

[0095] Alternatively, the side access cover 64 is connected to the rear side wall 12. One side of the side access cover 64 can be flipped relative to the rear side wall 12. The other sides of the side access cover 64 are provided with through holes corresponding to the fixing holes of the rear side wall 12, and are connected by fasteners.

[0096] Specifically, the side access port 101 has a dimension of 720mm in the second direction D2 and a height of 70mm. The height of the first electrical component 32 is smaller than the height of the side access port 101, so that the BMS main control board 322, the BMS slave control board 323 and the first BDU module 321 in the first electrical component 32 can be passed through the side access port 101 respectively.

[0097] Specifically, when it is necessary to replace one of the BMS main control board 322, BMS slave control board 323 and the first BDU module 321, the fasteners in the first fixing hole 111 are released, the side inspection cover 64 is removed, and the wiring harness buckles 91 can be disassembled one by one through the first inspection port 12. The plug connector is removed and the faulty electrical component is allowed to pass through the side inspection port 101.

[0098] In some embodiments, such as Figure 7 and Figure 8 As shown, 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 direction of the second electrical part 33, and the second wiring harness 312 is detachably connected to at least one end of the second electrical part 33, thereby electrically connecting the electrical connection structure 31 to the second electrical part 33.

[0099] 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 part 31 and the second electrical part 33. The fourth wiring harness 314 is connected to the third wiring harness 313, and the end of the fourth wiring harness 314 is provided with a low-voltage terminal 316. Through the low-voltage terminal 316 of the fourth wiring harness 314, the battery pack 100 can transmit signals with devices outside the battery pack 100.

[0100] In some embodiments, to reduce the swaying of the electrical connection structure 31 within the battery pack 100, multiple snap fasteners may be provided to constrain the wiring harness.

[0101] Specifically, such as Figure 7 As shown, a first fastener 361 can be provided to constrain the first wire harness 311, for example, the first wire harness 311 can be fastened to a dividing beam 51. A second fastener 362 can be provided to constrain the second wire harness 312, for example, the second wire harness 312 can be fastened to a dividing beam 52. A third fastener 363 can be provided to constrain the third wire harness 313, for example, the third wire harness 314 can be fastened to a dividing beam 51.

[0102] 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 dividing beam 51. Optionally, a fifth fastener 365 may be provided to constrain the first wiring harness 311, the first fastener 361 being located on the front side of the first electrical part 32 and the fifth fastener 365 being located on the rear side of the first electrical part 32, for example, the fifth fastener 365 may be fastened to the support frame 4 or the rear side wall 12.

[0103] In some embodiments, such as Figure 13 and Figure 6 As shown, the partition assembly 5 includes at least one partition beam 50, for example, it may include at least one partition crossbeam 51 or at least one partition longitudinal beam 52, for cooperating with the frame 10 to divide the receiving cavity V1 into multiple receiving cavities V10. Each partition crossbeam 51 extends in the left-right direction, and each partition longitudinal beam 52 extends in the front-back direction.

[0104] In some specific embodiments, such as Figure 3 and Figure 14 As shown, the partition component 5 includes at least three partition beams 51, which extend in the left-right direction and are spaced apart in the front-back direction.

[0105] Battery pack 2 is located between the foremost and last partition beams 51. The foremost partition beam 51 and the front sidewall 11 define a front compartment V11, and the second electrical component 33 is located within the front compartment V11. The last partition beam 51 and the rear sidewall 12 define a rear compartment V12, and the first electrical component 32 is located within the rear compartment V12.

[0106] The arrangement of at least three dividing beams 51 divides the interior of the battery pack 100 housing 1 into zones, which not only improves the structural strength of the battery pack 100 but also provides mounting positions for internal structures. Furthermore, the arrangement of at least three dividing beams 51 can also restrict the direction of internal fluid discharge.

[0107] Specifically, the partition assembly 5 further includes at least two partition longitudinal beams 52, which extend in the front-rear direction, and a partition longitudinal beam 52 is connected between each two adjacent partition crossbeams 51. A receiving cavity V10 is defined between two adjacent partition crossbeams 51, a partition longitudinal beam 52, and the side wall of the housing 1. The battery pack 2 includes a plurality of battery groups 20, and each receiving cavity V10 contains one battery group 20.

[0108] exist Figure 3 and Figure 4 In the battery pack 2, there are four battery groups 20, each of which is located in a receiving compartment V10.

[0109] In some specific embodiments, such as Figure 14 and Figure 6 As shown, each dividing beam 51 includes a lower beam 511 and an upper beam 512. The lower beam 511 extends in the left-right direction, and its two ends are connected to the left side wall 13 and the right side wall 14 of the housing 1, respectively. The upper beam 512 extends in the left-right direction and is fixedly connected above the lower beam 511. At least two spaced-apart upper beams 512 are connected to each lower beam 511.

[0110] On the same dividing beam 51, the upper beam 512 on the left side defines a first notch 5131 between the upper beam 512 on the left side and the left side wall 13 of the shell 1, the upper beam 512 on the right side defines a second notch 5132 between the upper beam 512 on the right side and the right side wall 14 of the shell 1, and a third notch 5133 is defined between two adjacent upper beams 512. A third notch 5133 is provided above the junction of two adjacent dividing beams 52.

[0111] This crossbeam and longitudinal beam overlap design facilitates installation and provides support for the third wiring harness 313 when it passes through the battery pack 2. It not only improves the orderliness of the wiring but also eliminates the need for the third wiring harness 313 to be inserted into the receiving cavity V10, reducing the likelihood of the pressure relief component 202 spraying internal electrolyte towards the third wiring harness 313, thereby reducing the risk of short circuits or open circuits in the third wiring harness 313.

[0112] Specifically, the third wiring harness 313 is fastened to the dividing longitudinal beam 52 by the wiring harness, which reduces the shaking of the third wiring harness 313 during vibration and reduces the chance of loosening caused by shaking.

[0113] In some specific embodiments, such as Figure 6 and Figure 8 As shown, the first wiring harness 311 is located within the rear compartment V12 and surrounds the first electrical component 32. The first wiring harness 311 is electrically connected to the battery pack 2, and is detachably electrically connected to the first electrical component 32. The second wiring harness 312 is located within the front compartment V11 and is positioned along the left-right direction behind the second electrical component 33. The second wiring harness 312 is detachably electrically connected to the second electrical component 33. In this way, both the first and second wiring harnesses 311 and 312 are constrained, reducing shaking and minimizing the risk of loosening of connections due to shaking.

[0114] Furthermore, such as Figure 6As shown, the battery pack 100 also includes at least one fastening sleeve 53 for connecting an external seat, the fastening sleeve 53 being disposed on the partition assembly 5. For example, the fastening sleeve 53 is fixedly connected to at least one partition beam 51, the partition beam 51 having at least two fastening sleeves 53 spaced apart in the left-right direction. Thus, when the battery pack 100 is applied to the vehicle 1000, the seats in the passenger space 220 can be fitted with the fastening sleeves 53 via fasteners, eliminating the need for a separate seat mounting beam in the passenger space 220, improving structural compactness and reducing the number of parts.

[0115] Optionally, the partition beam 51 is provided with fastening sleeves 53 that correspond one-to-one with the seat fixing fasteners 66, and the lower end of the seat fixing fasteners 66 is threaded into the fastening sleeves 53.

[0116] Optionally, such as Figure 6 and Figure 1 As shown, the height of the dividing beam 51 is less than the height of the housing 1. The fastening sleeve 53 is welded to the top of the dividing beam 51. The top cover 16 of the housing 1 is provided with seat fixing fasteners 66 facing each fastening sleeve 53. In this way, the seat can be connected to both the seat fixing fasteners 66 and the fastening sleeves 53 through the fasteners, thereby increasing the vertical length of the mating parts. Moreover, when the seat is under force, it will transmit the force to the entire battery pack 100, using the battery pack 100 as a whole to disperse the impact force.

[0117] In some specific embodiments, such as Figure 2 As shown, the battery cells 201 in the battery group 20 are arranged in a left-right direction, and each battery cell 201 has a pressure relief component 202 at its left and / or right ends. Figure 2 In the example, each battery cell 201 in each battery group 20 is provided with a pressure relief component 202 to improve its safety. The number of pressure relief components 202 on each battery cell 201 can be one or more, and there is no limit here.

[0118] Specifically, the battery cell 201 is sheet-shaped and extends along the second direction D2. Multiple battery cells 201 are stacked along the first direction D1 to form a battery group 20, which helps to increase the arrangement density of the battery group 20 and increase the energy density of the battery pack 100.

[0119] In this design, the battery pack 20 forms flow channels V101 between its left and right ends and the inner walls of the receiving chamber V10. This eliminates the need for additional channels, allowing the high-pressure gas discharged from the pressure relief component 202 to be released through the channels between the ends of the battery pack 20 and the inner walls of the receiving chamber V10, thus improving the utilization of internal space. This flow channel V101 can also function as a buffer channel for the battery pack 20.

[0120] Optionally, the width x1 of the flow channel V101 can be 20-50mm, thereby effectively ensuring the flowability of the flow channel V101 without being too wide and occupying too much volume. Optionally, the width x1 of the flow channel V101 can be 35mm. Here, the width x1 of the flow channel V101 refers to its dimension in the second direction D2.

[0121] Correspondingly, at least one of the front sidewall 11 and the rear sidewall 12 may be provided with a pressure balancing valve 65, so that the airflow at the flow channel V101 can be discharged from the pressure balancing valve 65.

[0122] Optionally, such as Figure 5 As shown, the rear sidewall 12 of the housing 1 has a through external port 102, so that the high-pressure gas can be discharged from one of the external ports 102. Further optionally, as... Figure 5 As shown, at least one external interface 102 is provided with a pressure balancing valve 65, so that when there is high pressure airflow inside, the pressure balancing valve 65 is opened to exhaust the air, and remains sealed when the air pressure is normal.

[0123] In some embodiments, such as Figure 6 As shown, the high-voltage terminal 315 and the low-voltage terminal 316 are mounted on the front side wall 11 of the housing 1 and are spaced apart from the second electrical part 33 in the left-right direction. An external interface 102 is provided on the rear side wall 12 of the housing 1. This arrangement ensures that the location of the battery pack 100 for external power communication and the side access port 101 are located on the front and rear sides of the battery pack 100, without interference. When installed on the vehicle 1000, the low failure rate of the power communication part, by placing it at the front and protecting it within the vehicle body 200, further reduces its failure rate.

[0124] The second electrical component 33 is located adjacent to and along the front sidewall 11. The high-voltage terminal 315 of the electrical module 3 can output high-voltage electricity to the outside of the battery pack 100 to provide electrical energy; the low-voltage terminal 316 of the electrical module 3 can output low-voltage electricity to the outside of the battery pack 100 to transmit signals. The electrical connection structure 31 connects the second electrical component 33, the low-voltage terminal 316, and the high-voltage terminal 315. Its installation position is close to the front sidewall 11, which can reduce the arrangement of the electrical connection structure 31 and reduce the application cost of electrical connections.

[0125] In some embodiments, such as Figure 3 As shown, the bottom plate of the housing 1 is a removable bottom cover 15, allowing the second electrical component 33 to be installed and removed when the bottom cover 15 is removed. The second electrical component 33 can be installed or removed from the housing 1, and the bottom plate of the housing 1 is a removable bottom cover 15, allowing the second electrical component 33 to be installed and removed when the bottom cover 15 is removed. When maintenance of the second electrical component 33 is required, the bottom cover 15 is removed from the battery pack 100, and then the second electrical component 33 is removed.

[0126] Specifically, such as Figure 22 and Figure 23 As shown, the battery pack 100 also includes a liquid cooling plate 6, which is located below the battery pack 2 and the electrical module 3. A bottom protective plate 15 is detachably connected to the bottom of the liquid cooling plate 6. The liquid cooling plate 6 is provided with a bottom access port 61 corresponding to the second electrical part 33. The bottom protective plate 15 covers the bottom access port 61.

[0127] The liquid cooling plate 6 has a bottom access port 61, which is located at the bottom of the battery pack 100 and corresponds to the second electrical part 33. The bottom protective plate 15 can cover the bottom access port 61. The liquid cooling plate 6 can be used to cool the battery pack 2 and keep it within a safe temperature range.

[0128] A bottom access port 61 is provided on the liquid cooling plate 6, which does not affect the disassembly of the second electrical part 33. Moreover, the liquid cooling plate 6 can be connected to the bottom of the frame 10 on all four edges, further improving the overall structural strength.

[0129] When applied to vehicle 1000, the underbody protection plate 15 serves as the base of vehicle 1000, bearing the weight of the vehicle 1000's interior; on the other hand, the underbody protection plate 15 protects the internal structure of battery pack 100, reducing damage.

[0130] Specifically, such as Figure 6 As shown, the liquid cooling plate 6 has a liquid flow channel for circulating cooling liquid. The liquid cooling plate 6 has liquid cooling pipes 601 for liquid to flow in or out, and each liquid cooling pipe 601 has a liquid cooling connector 602 at its end for connecting to an external water tank. The liquid cooling connector 602 can be mounted on the frame 10, for example, on the front side wall 11.

[0131] Furthermore, such as Figure 22 As shown, a sealing ring 62 needs to be installed around the bottom access port 61 to improve the sealing performance of the bottom access port 61 during use.

[0132] The location of the bottom access port 61 is quite flexible, for example, in... Figure 22 In the middle, the liquid cooling plate 6 is provided with a sealing ring 62 surrounding the bottom inspection port 61. For example... Figure 37 In the middle, the bottom guard plate 15 is provided with a sealing ring 62 surrounding the bottom inspection port 61.

[0133] In other embodiments, such as Figure 22As shown, the battery pack 100 also includes a bottom access cover 63 covering the bottom access port 61. The bottom access cover 63 is detachably connected to the liquid cooling plate 6 and is located above the bottom protective plate 15. The bottom access cover 63 can protect the internal structure of the battery pack 100 and prevent dust, moisture, etc. from entering the battery pack 100 through the bottom access port 61.

[0134] Optionally, the bottom access cover 63 is provided with a sealing ring 62 surrounding the bottom access port 61 to further improve the sealing protection of the bottom access port 61.

[0135] Furthermore, such as Figure 37 As shown, the battery pack 100 includes fastening bolts 611 connecting the bottom protective plate 15 and the liquid cooling plate 6, with multiple fastening bolts 611 distributed around the bottom access port 61. The fastening bolts 611 secure the bottom protective plate 15 and the liquid cooling plate 6 at the bottom access port 61, improving the connection reliability and sealing at the bottom access port 61.

[0136] In some specific embodiments, such as Figure 34 and Figure 35 As shown, the battery pack has a liquid cooling plate 6, which has a bottom inspection port 61 extending along its thickness direction. The liquid cooling plate 6 also has a liquid flow channel 6-01 inside. The upper surface of the liquid cooling plate 6 has a liquid inlet 6-02 and a liquid outlet 6-03, and the bottom inspection port 61 is located between the liquid inlet 6-02 and the liquid outlet 6-03.

[0137] By providing a bottom access 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 access port 61. This allows for easy access during maintenance by simply opening the bottom access port 61, improving the convenience of battery pack 100 maintenance. By placing the liquid inlet 6-02 and liquid outlet 6-03 adjacent to the bottom access port 61, and connecting the liquid cooling pipe 601 above the inlet 6-02 and outlet 6-03, and installing at least some of the electrical modules 3 above the bottom access port 61, the space can be compactly arranged without occupying other areas. The freed-up area on the liquid cooling plate 6 can be used to arrange the battery pack 20, improving the space utilization of the area above the liquid cooling plate 6. Furthermore, since the inlet 6-02 and outlet 6-03 are located at opposite ends of the bottom access port 61, the connected liquid cooling pipe 601 is positioned near the electrical modules 3, improving the heat dissipation effect on the electrical modules 3.

[0138] Specifically, one side of the liquid cooling plate 6 is designated as connector side 6-04, named according to the location of the liquid cooling connector 602 on the battery pack 100. The side of the liquid cooling plate 6 adjacent to the liquid cooling connector 602 is connector side 6-04. The bottom access port 61 extends along connector side 6-04, and both the liquid inlet 6-02 and the liquid outlet 6-03 are located adjacent to connector side 6-04. In other words, the electrical module 3 (such as the second electrical part 33) located above the bottom access port 61 is located near the liquid cooling connector 602. This eliminates the need to disassemble the side of the housing 1 where the liquid cooling connector 602 is installed. The electrical module 3 (such as the second electrical part 33) only needs to be disassembled and maintained from the bottom, without conflict, thus avoiding the impact on the reliability of the liquid and current in case of conflict.

[0139] Specifically, the inlet 6-02 is located in the middle of the liquid cooling plate 6, and there are two outlets 6-03, located on opposite sides of the inlet 6-02. The inlet 6-02 and the outlet 6-03 are located at both ends of the bottom inspection port 61 along its length. In this way, the coolant enters from the middle and exits from both sides. Since heat accumulates in the middle of the battery pack 100, the low-temperature liquid enters from the middle, improving the cooling effect on the middle part of the battery pack 100 and thus improving the overall temperature uniformity.

[0140] In some embodiments, the partition assembly 5 includes: a partition beam 51, which extends in a left-right direction, and the receiving cavity V10 includes a front cavity V11 located on one side of the partition beam 51, with a bottom access port 61 located in the front cavity V11.

[0141] 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 positioned opposite 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.

[0142] Specifically, the liquid cooling plate 6 is provided with a plurality of first liquid cooling clearance holes 6-09, which are arranged around the bottom inspection port 61.

[0143] At least a portion of the first liquid cooling clearance hole 6-09 is positioned opposite the partition beam 51 on one side of the front compartment 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 clearance hole 6-09.

[0144] In some alternative embodiments, such as Figure 34As shown, the liquid cooling plate 6 has at least two rows of first liquid cooling connection holes 6-07, with the two rows of first liquid cooling connection holes 6-07 located on both sides of the bottom inspection port 61. Multiple first liquid cooling connection holes 6-07 in each row are arranged at intervals along the long side of the bottom inspection port 61. The first liquid cooling connection holes 6-07 are used to fix 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, especially increasing the reliability and strengthening the stability on both sides of the electrical module 3 in this part.

[0145] Of course, in this application, the liquid cooling plate 6 is also provided with at least one row of second liquid cooling connection holes 6-08, which are also used to fix the liquid cooling plate 6 to the frame 10 of the battery pack 100.

[0146] Furthermore, the liquid cooling plate 6 is provided with at least two rows of first liquid cooling clearance holes 6-09, which are located on both sides of the bottom access port 61. Multiple first liquid cooling clearance holes 6-09 in each row are arranged at intervals along the long side of the bottom access port 61. The diameter of the first liquid cooling clearance holes 6-09 is larger than the diameter of the first liquid cooling connecting holes 6-07. The first liquid cooling clearance holes 6-09 are used to avoid the fasteners connecting the bottom protective plate 15 of the battery pack 100 to the frame 10. This facilitates the connection between the lower bottom protective plate 15 or the bottom access cover 63 and the frame 10. The two connections do not conflict, reducing the chance of accidental disassembly during assembly and disassembly.

[0147] 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 to be fixedly connected to the partition assembly 5 and the frame 10. Some of the plurality of first liquid cooling connection holes 6-07 are arranged facing the partition crossbeam 51 and some are arranged facing 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.

[0148] Furthermore, the liquid cooling plate 6 is provided with a plurality of first liquid cooling clearance holes 6-09 and a plurality of second liquid cooling clearance holes 6-10. The plurality of first liquid cooling clearance holes 6-09 are arranged around the bottom inspection port 61, and the plurality of second liquid cooling clearance holes 6-10 are arranged along the edge of the liquid cooling plate 6. The bottom protective plate 15 is detachably connected to the top of the liquid cooling plate 6 through the first liquid cooling clearance holes 6-09 and the second liquid cooling clearance holes 6-10.

[0149] In some embodiments, such as Figure 35As shown, the liquid flow channel 6-01 includes: a branch channel 6-11, which is located in the middle of the liquid cooling plate 6, and an inlet 6-02 connected to one end of the adjacent connector side 6-04 of the branch channel 6-11; two return channels 6-12, which are located on opposite sides of the branch channel 6-11, and extend along opposite sides of the liquid cooling plate 6, with two outlets 6-03 connected to one end of the adjacent connector side 6-04 of the two return channels 6-12; and multiple heat dissipation channels 6-13, which are divided into two groups corresponding to the two return channels 6-12, with each group of heat dissipation channels 6-13 connected between the branch channel 6-11 and the corresponding return channel 6-12, and the multiple heat dissipation channels 6-13 corresponding one-to-one with the multiple battery groups 20 in the battery pack 100.

[0150] As its name suggests, the distribution channel 6-11 is used to distribute the coolant. The coolant flowing in from the inlet 6-02 is distributed to each heat dissipation channel 6-13 via the distribution channel 6-11. The coolant in each heat dissipation channel 6-13 flows back to the outlet 6-03 via the return channel 6-12.

[0151] To improve cooling performance, the heat dissipation channel 6-13 can be S-shaped or other shapes, and the heat dissipation channel 6-13 has multiple bends to allow for a longer heat dissipation channel 6-13 to be arranged in a smaller area.

[0152] Furthermore, the liquid flow channel 6-01 also includes: a first extension sub-channel 6-14, located on the side of the bottom inspection port 61 away from the liquid inlet 6-02, and connected to an adjacent return sub-channel 6-12, with an outlet 6-03 positioned directly opposite the first extension sub-channel 6-14; and a second extension sub-channel 6-15, connected to another return sub-channel 6-12, and bent relative to the return sub-channel 6-12 and extending towards the liquid inlet 6-02, with another outlet 6-03 positioned directly opposite the end of the second extension sub-channel 6-15 adjacent to the liquid inlet 6-02. This allows for flexible placement of the outlet 6-03 using the first extension sub-channel 6-14 and the second extension sub-channel 6-15, facilitating the arrangement of the liquid cooling pipe 601. This ensures that the liquid cooling pipe 601 can cool the second electrical module 33 without being too long from the liquid cooling connector 602.

[0153] Optionally, such as Figure 34 and Figure 35As shown, the liquid cooling plate 6 includes an upper liquid plate 6-05 and a lower liquid plate 6-06 stacked in phase. A liquid flow channel 6-01 is formed by 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. An inlet 6-02 and an outlet 6-03 are formed on the upper liquid plate 6-05. The lower liquid plate 6-06 has at least one welding through-hole 6-061 with a weld point. This facilitates the placement of weld points along the edge of the welding through-hole 6-061, resulting in a stronger bond between the upper liquid plate 6-05 and the lower liquid plate 6-06.

[0154] Alternatively, the welding through hole 6-061 is disposed adjacent to the liquid flow channel 6-01, and the side of the liquid flow channel 6-01 adjacent to the welding through hole 6-061 forms an avoidance arc edge 6-16, which surrounds the welding through hole 6-061.

[0155] The structure above the bottom protective plate 15 is connected.

[0156] Specifically, the upper surface of the bottom guard plate 15 is provided with an upwardly protruding thickened rib 151, the projection surface of the thickened rib 151 on the liquid cooling plate 6 completely covers the bottom access port 61. In this way, after the bottom guard plate 15 is connected and fixed to the upper frame 10, the thickened rib 151 is squeezed upward, thereby pressing the bottom access port 61 and improving the sealing performance.

[0157] The bottom plate 150 is the main structural component of the bottom cover plate 15, used to connect to the bottom of the battery pack 100, serving both protective and decorative purposes. A thickened rib 151 is provided on the upper surface of the bottom plate 150, protruding upwards relative to the bottom plate 150, supporting the edge of the bottom access port 61 of the battery pack 100. For example, when a liquid cooling plate 6 is provided at the bottom of the battery pack 100, and the bottom access port 61 is located directly opposite an electrical component (such as the second electrical component 33 mentioned above), the thickened rib 151 can support the edge of the bottom access port 61, providing support. A sealing structure is typically provided at the edge of the bottom access port 61; the thickened rib 151 will press against the sealing structure, improving the sealing effect. Therefore, the bottom cover plate 15 of this application can improve the sealing reliability around the bottom access port 61, thereby improving the sealing protection of the electrical modules of the battery pack 100.

[0158] Optionally, the thickened rib 151 is a single part, and the bottom plate 150 is a single part. The thickened rib 151 is connected to the bottom plate 150 by welding or gluing. Thus, when the bottom plate 15 is disassembled and assembled, the thickened rib 151 and the bottom plate 150 are an integral structure and will not shift. This also helps to improve the sealing effect between the two.

[0159] 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 the sealing ring 62 extends along the inner edge of the thickened rib 151. This arrangement facilitates positioning and, during the tightening process of the bottom guard plate 15, presses the sealing ring 62 upward, thereby ensuring the sealing of the edge of the bottom inspection port 61.

[0160] Furthermore, there are multiple first bottom connecting holes 156, which 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 tightening will create multiple points of compression around the sealing ring 62, further improving the sealing effect.

[0161] In some specific embodiments, one side of the thickened rib 151 is flush with one side of the base plate 150. It is understood that when the base plate 15 is connected to the frame 10 of the housing 1, the edge connection structure is sealed. By aligning one side of the thickened rib 151 with one side of the base plate 150, the upper part of one side of the thickened rib 151 faces the side of the frame 10, and the electrical components directly opposite it are adjacent to the frame 10. This provides support and protection for the electrical components from the structurally strong frame 10, and also concentrates the structure near the frame 10, increasing the density of component arrangement. Furthermore, from the outside, with one side of the thickened rib 151 flush with one side of the base plate 150, the connected layered structure can be observed, thus detecting any missing components.

[0162] In some embodiments, such as Figure 37 As shown, the bottom protective plate 15 also includes a bottom edge strip 153, which is stacked on top of the bottom main plate 150 and along the edge of the bottom main plate 150. The bottom edge strip 153 has a second bottom connecting hole 157 that extends downward through the bottom main plate 150. It is understood that when the battery pack 100 is impacted, the corners of the battery pack 100 become the most severely impacted and deformed locations. Therefore, by providing the bottom edge strip 153 in this application, the protection and support effect on the edge of the bottom protective plate 15 can be improved, reducing the possibility of the bottom protective plate 15 folding or curling due to its thinness during disassembly and assembly. Furthermore, by providing the second bottom connecting hole 157 on the bottom edge strip 153, and using fasteners passing through the second bottom connecting hole 157 to connect the frame 10, the bottom edge strip 153 can reduce the probability of the fasteners penetrating the bottom protective plate 15, improving the reliability of the fastener connection at the second bottom connecting hole 157.

[0163] Specifically, the thickened rib 151 is located on one side of the base plate 150, and the bottom edge strip 153 is an annular shape consistent with the edge shape of the base 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.

[0164] Optionally, the height h3 of the bottom edge strip 153 is greater than the height h4 of the thickened rib 151. That is, the upper surface of the bottom edge strip 153 is higher than the upper surface of the thickened rib 151. With this arrangement, when the bottom cover 15 is connected to the bottom of the housing 1, this height difference can form a gap, which facilitates the installation of a sealing structure. For example, when a bottom access cover 63 is installed above the thickened rib 151, this gap can accommodate the bottom access cover 63. Alternatively, when a sealing ring 62 is installed, a thicker sealing ring 62 can be installed, providing some flexibility in the selection of the sealing structure.

[0165] In some alternative embodiments, as shown in 28, a shock-absorbing layer 18 may be provided on the upper surface of the bottom protective plate 15 to improve the buffer protection of the internal battery pack 2 and electrical module 3.

[0166] In some embodiments, such as Figure 13 and Figure 6 As shown, a fixing plate 67 is provided inside the housing 1, and the fixing plate 67 is located above the second electrical part 33. The second electrical part 33 is detachably connected to the fixing plate 67 by a fourth bolt 3294. The head of the fourth bolt 3294 is located at the lower end, that is, the installation direction of the fourth bolt 3294 is away from the fixing plate 67 and towards the bottom access port 61. The projection of the fourth bolt 3294 on the liquid cooling plate 6 is located inside the bottom access port 61, thereby allowing the fourth bolt 3294 to be removed or installed through the bottom access port 61, improving the convenience of removal or installation.

[0167] like Figures 23-24 As shown, in some embodiments, the second electrical portion 33 includes a second electrical housing 332 for accommodating electrical components. Specifically, the second electrical portion 33 further includes a first extension plate 3351 connected to at least one side of the second electrical housing 332, and the first extension plate 3351 has 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 vertically arranged.

[0168] like Figure 26 As shown, the damping column 333 includes two thick column segments 3331 and a thin column segment 3332 located between the two thick column segments 3331. Figure 24 and Figure 25 As shown, the thin column segment 3332 fits into the mating groove, and the two thick column segments 3331 are sandwiched between the upper and lower sides of the first extension plate 3351. The damping column 333 has a central hole 3333, and the fourth bolt 3294 passes through the central hole 3333 and connects to the fixing plate 67. By setting the damping column 333, on the one hand, the fixing plate 67 can be connected, improving the reliability of the connection; on the other hand, it absorbs the vibration of the second electrical part 33 to protect the electrical components housed inside the second electrical housing 332.

[0169] For easy disassembly, the electrical connection structure 31 is electrically connected to the second electrical part 33 via a flexible wire harness. For example, the connector of the second electrical part 33 for communication is a first signal transmission interface 339, and the second wire harness 312 of the electrical connection structure 31 is connected to a second signal transmission interface 3121, and the two are plugged into each other.

[0170] like Figure 23 As shown, the first signal transmission interface 339 is located at the bottom of the second electrical housing 332, so the interface status can be easily observed when the bottom access port 61 is opened. Specifically, the second signal transmission interface 36 is plugged into the first signal transmission interface 339 from the side. This facilitates manual plugging and unplugging of the second signal transmission interface 36 while reducing shaking by utilizing the weight of the wires supported by the interface.

[0171] Specifically, the first signal transmission interface 339 is connected to the interior of the second electrical housing 332 via multiple fourth flexible wires 331, thereby allowing the second electrical part 33 to be connected to the electrical connection structure 32 via the first transmission interface 319.

[0172] In some specific embodiments, such as Figure 25 As shown, the second electrical housing 332 of the second electrical component 33 is detachably connected to the housing 1. The second electrical component 33 includes a main relay 337, a current-connecting strip 338, and a first transmission interface 319. The main relay 337 is located inside the electrical housing 1, one end of the current-connecting strip 338 is connected to the main relay 337, and the other end of the current-connecting strip 338 is located outside the second electrical housing 332. The current-connecting strip 338 is used to connect high-voltage electricity, and the main relay 337 can control the high-voltage electricity.

[0173] 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 electrical connector 338 via a fifth bolt 3295. The second signal transmission interface 36 is plugged into the first signal transmission interface 339, thereby realizing the electrical connection between the second electrical part 33 and the electrical connection structure 32.

[0174] For example, the copper busbar 317 is elongated and has a certain degree of flexibility, allowing it to be bent. The connection between the copper busbar 317 and the connecting strip 338 has an insulating cover, which is attached to the second electrical housing 332. When it is necessary to remove the second electrical component 33, first disconnect the power to the second electrical component 33, remove the insulating cover, release the fixing structure between the copper busbar 317 and the connecting strip 338, and then loosen the fifth bolt 3295. By unplugging the second transmission interface 37, the fourth bolt 3294 is exposed and can be loosened.

[0175] like Figure 27As shown, in some embodiments, the second electrical part 33 further includes a second extension plate 3352 connected to the second electrical housing 332. The second extension plate 3352 has mating hooks 33521 on both sides. There are two first signal transmission interfaces 339, and the two first signal transmission interfaces 36 are located on both sides of the second extension plate 3352. Each first signal transmission interface 339 has a mating groove that mates with the mating hooks 33521. The first signal transmission interface 339 can be fixed on the second electrical housing 332 by means of a snap-fit ​​connection, which can reduce the connection cost and improve the connection reliability.

[0176] like Figure 25 As shown, in some embodiments, two main relays 337 are spaced apart. The bottom of the second electrical housing 332 forms a downwardly protruding portion 336, which covers the bottom of the two main relays 337 respectively. The bottom of the second electrical housing 332 is provided with a second through hole 3361 near the two downward protrusions 336. A portion of the fourth flexible wire 331 extends into the second electrical housing 332 through one second through hole 3361, and a portion extends into the second electrical housing 332 through another second through hole 3361. In this way, the second electrical housing 332 can be used to define the placement position of the fourth flexible wire 331, reduce the probability of interference with other components, and reduce the adverse effects on signal generation.

[0177] Optionally, such as Figure 25 and Figure 27 Therefore, at least one side of the lower protrusion 336 is provided with a wire fastener 3362 for limiting the fourth flexible conductor 331. This restricts the movement of the wire fastener 3362 and reduces its swaying.

[0178] In some embodiments, such as Figures 28-29 As shown, the top cover 16 includes a cover body 161 and seat fixing fasteners 66. The cover body 161 has at least two first mounting holes in a row, located in the middle area of ​​the cover body 161. Seat fixing fasteners 66 are correspondingly positioned at each of the first mounting holes. The lower end of each seat fixing fastener 66 is located within the frame 10 for fixation, and the upper end of each seat fixing fastener 66 is used to connect to the seat 300. In other words, the seat fixing fasteners 66 are placed inside the frame 10 and can be directly or indirectly connected to the frame 10. The seat 300 can be connected to the seat fixing fasteners 66 via the fasteners. When the seat 300 is subjected to force, the force is transmitted to the entire battery pack 100, utilizing the battery pack 100 as a whole to disperse the impact force.

[0179] With this design, the battery pack 100, after being installed on the vehicle body 200, can be integrated with the vehicle body 200. This disperses external impacts on the vehicle body 200, reducing the destructive force of the dispersed 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, further reducing the weight of the remaining floor of the vehicle body 200. This design also reduces the number of parts and assembly steps.

[0180] In some specific embodiments, such as Figure 28 and Figure 29 As shown, the seat fixing fastener 66 has a seat fixing threaded hole 661 extending downwards from the top. The seat 300 can then be connected to the seat fixing fastener 66 via a threaded fastener. For example, the bottom of the seat 300 has a seat base beam with a through hole, through which a bolt is threaded and 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 allowing for detachable assembly.

[0181] Optionally, the seat fixing threaded hole 661 extends through the seat fixing fastener 66 in the vertical direction, thereby reducing the machining difficulty. Of course, it is also possible that in some designs, the bottom of the seat fixing threaded hole 661 is not through, and it is a blind hole.

[0182] Furthermore, such as Figure 28 As shown, 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.

[0183] Optionally, the inner contour of the rotary table 662 is polygonal, which makes it easy to use tools (such as screwdrivers, electric wrenches, etc.) to fit into the rotary table 662, drive the seat fixing fastener 66 to rotate and assemble, and improve the assembly efficiency of the rotary table 662.

[0184] Optionally, the outer contour of the rotary table 662 is polygonal, which facilitates the use of tools (such as wrenches, electric wrenches, etc.) to rotate the seat fixing fastener 66 for assembly, thereby improving the assembly efficiency of the rotary table 662. In some designs, after the seat 300 is installed on the battery pack 100, tools can be used to tighten or loosen the seat fixing fastener 66 by engaging the rotary table 662 from the bottom of the seat 300.

[0185] Specifically, the seat fastener 66 also includes a supporting frustum 663, which is located below the rotary table 662. The supporting frustum 663 effectively forms a washer integrally on the seat fastener 66, increasing the contact area between the head of the seat fastener 66 and the top cover 16. Furthermore, it ensures that the pressure exerted on the top cover 16 during rotation of the seat fastener 66 is evenly distributed circumferentially, reducing stress concentration and tearing around the first mounting hole. Further, the outer contour of the rotary table 662 is hexagonal, with the diameter of its circumscribed circle smaller than the diameter of the supporting frustum 663. This allows the supporting frustum 663 to separate the tool from the top cover 16 when a tool engages with the outer contour of the rotary table 662, reducing wear on the top cover 16.

[0186] Alternatively, the outer peripheral surface of the seat fixing fastener 66 is provided with external threads, which are used to connect to the inside of the frame 10, thereby improving assembly efficiency.

[0187] In some embodiments, such as Figure 29 As shown, the cover body 161 has at least two layers, including a rigid plate layer 161a and an insulating buffer layer 161b. The rigid plate layer 161a ensures the overall rigidity of the top cover 16, while the buffer layer 161b provides cushioning protection. Furthermore, the buffer layer 161b facilitates sealing connections, and its use of insulating material enhances the internal and external protection of the battery pack 100. Optionally, the rigid plate layer 161a can be a steel plate layer or other metal layer. Optionally, the buffer layer 161b can be a plastic layer, a composite plastic layer, a rubber layer, etc., without limitation.

[0188] In some embodiments, such as Figures 30-33 As shown, frame 10 is formed by connecting multiple frame side beams 10-1 sequentially along its length to form a ring frame, referred to as frame 10. Specifically, the front sidewall 11 is composed of at least one frame side beam 10-1, the rear sidewall 12 is composed of at least one frame side beam 10-1, the left sidewall 13 is composed of at least one frame side beam 10-1, and the right sidewall 14 is composed of at least one frame side beam 10-1. Each frame side beam 10-1 includes at least two frame sections 10-10 distributed along the height direction, and each frame section 10-10 forms a closed frame cavity 10-40. Each frame side beam 10-1 may include two frame sections 10-10, which are stacked sequentially along the height direction. In some embodiments, such as... Figure 30 As shown, two adjacent frame sections 10-10 are connected by a connecting rib 10-6. Optionally, the two frame sections 10-10 and the connecting rib 10-6 are integrally roll-formed from steel plates, or the two frame sections 10-10 and the connecting rib 10-6 are integrally formed extruded aluminum profiles.

[0189] Each frame edge beam 10-1 is formed by integral roll forming of steel plate, or by integral extrusion of aluminum profile. This ensures that all frame sections 10-10 of each frame edge beam 10-1, or all frame sections 10-10 and all connecting ribs 10-6, are continuous. Furthermore, each side of each frame section 10-10 is roll-formed or extruded, not stretched from ordinary profiles. This reduces welding between the sides of the same frame section 10-10 and between adjacent frame sections, thus reducing processing steps. Additionally, adjacent frame sections not only have a splicing and overlapping position but also are connected by tension at the edges, resulting in stronger overall integrity and significantly improved overall structural strength.

[0190] Specifically, in some embodiments, the connecting rib 10-6 connecting the two frame parts 10-10 has a high-voltage terminal 315 and a low-voltage terminal 316 installed on the connecting rib 10-6 of the front sidewall 11, and a side inspection port 101 provided on the connecting rib 10-6 of the rear sidewall 12. Further, as... Figure 31 As shown, the mounting beam 17 is integrally roll-formed from a steel plate, or the mounting beam 17 is integrally formed from an extruded aluminum profile. Optionally, the mounting beam 17 includes at least one mounting portion 17-10, the mounting portion 17-10 including a mounting cavity 17-40 extending along its length to absorb most of the external force energy, reduce structural vibration, improve structural safety, and also reduce noise.

[0191] In some embodiments, such as Figure 3 and Figure 14 As shown, specifically, the partition assembly 5 includes at least one partition beam 50, the partition beam 50 includes at least two partition portions 50-10 arranged along the height direction, the partition portions 50-10 form partition cavities 50-40, and the partition cavities 50-40 extend along the length direction of the partition beam 50.

[0192] Specifically, each partition 50-10 is formed by integral roll forming of steel plate or by integral extrusion of aluminum profile. Each side of partition 50-10 is roll-formed or extruded, not formed by stretching ordinary profiles. This reduces welding between the sides of the same partition 50-10 and between adjacent frame parts, thereby reducing processing steps. In addition, adjacent frame parts not only have a splicing and overlapping positional relationship, but also have connected edges that are pulled together, resulting in stronger overall integrity and significantly improved overall structural strength.

[0193] In some embodiments, the multiple partition beams 50 of the partition assembly 5 include at least two partition crossbeams 51, with adjacent partition crossbeams 51 spaced apart in the front-to-back direction, and the battery pack 2 of the battery pack 100 located between the foremost partition crossbeam 51 and the last partition crossbeam 51. The receiving compartment V10 includes at least one of a front compartment V11 and a rear compartment V12.

[0194] When the front compartment V11 is included, it is used to install the electrical module 3 for the battery pack 100. The front compartment V11 is defined between the foremost partition beam 51 and the front sidewall 11. When the rear compartment V12 is included, it is used to install the electrical module 3 for the battery pack 100. The rear compartment V12 is defined between the last partition beam 51 and the rear sidewall 12. That is, the electronic control unit can be integrated into one unit and housed in either the front compartment V11 or the rear compartment V12. Alternatively, the electronic control unit can be divided into two parts and housed separately in either the front compartment V11 or the rear compartment V12.

[0195] In some embodiments, the partitions 50-10 are rectangular tubes, which facilitates stacking and reduces interference with the battery pack 2.

[0196] Specifically, two partition sections 50-10 are stacked along the height of the partition beam 51. The two partition sections 50-10 are connected by welding or by bolts. Alternatively, the two partition sections 50-10 are integrally roll-formed from steel plates or integrally formed from extruded aluminum profiles.

[0197] In some embodiments, the partition assembly 5 further includes a partition longitudinal beam 52, wherein a partition longitudinal beam 52 is connected in the middle of each two adjacent partition crossbeams 51 to divide the space between two adjacent partition crossbeams 51 into two receiving cavities V10.

[0198] In some embodiments, at least one dividing beam 51 includes a lower beam 511 and an upper beam 512. The lower beam 511 extends in a left-right direction, and its two ends are connected to the left side wall 13 and the right side wall 14, respectively. The upper beam 512 extends in a left-right direction and is fixed above the lower beam 511. At least two spaced-apart upper beams 512 are connected to the lower beam 511.

[0199] On the same dividing beam 51, a first gap 5131 is defined between the upper beam 512 on the left and the left wall 13, a second gap 5132 is defined between the upper beam 512 on the right and the right wall 14, a third gap 5133 is defined between two adjacent upper beams 512, and a third gap 5133 is provided at the connection between the dividing longitudinal beam 52 and the dividing beam 51.

[0200] In some embodiments, such as Figure 30As shown, the upper crossbeam 512 includes at least one partition 50-10 arranged along the height direction. The upper crossbeam 512 is formed by roll forming from the same steel plate, or is an integrally formed extruded aluminum profile. Figure 30 As shown, the lower crossbeam 511 includes at least one partition 50-10 arranged along the height direction. The lower crossbeam 511 is formed by rolling from the same steel plate or is an integrally formed extruded aluminum profile.

[0201] In some embodiments, the ends of the dividing longitudinal beam 52 are welded and fixed to the lower crossbeam 511. This does not affect the notch setting, ensures that the weld line is long enough, and improves welding reliability. The ends of the dividing crossbeam 51 are welded to the frame side beam 10-1 via a mounting plate 54.

[0202] Specifically, the battery group 20 is spaced apart from the partition beam 52, so that the battery group 20 forms a flow channel on the side facing the partition beam 52, which facilitates airflow and facilitates the discharge of high-temperature air.

[0203] In some embodiments, each battery pack 20 has a first busbar 203. The first busbar 203 of the battery pack 2 on the left extends into the front compartment V11 or the rear compartment V12 through an adjacent first notch 5131, and the first busbar 203 of the battery pack 2 on the right extends into the front compartment V11 or the rear compartment V12 through an adjacent second notch 5132. This makes the position of the first busbar 203 clear and neat, allowing for cooling through the airflow, and also reducing interference with the wiring harness as it is not located in the center of the battery pack 100. Figure 7 As shown, this makes the entire electrical connection structure 31 neat and orderly.

[0204] Specifically, such as Figure 2 As shown, the battery pack 2 is also provided with a second busbar 204 near the first electrical part 32. The two second busbars 204 are connected in series with the fuse 3212 to provide voltage reduction protection when the voltage is high. Specifically, the second busbar 204 is in the rear compartment V12 and is located in front of the first BDU module 321.

[0205] Optionally, such as Figure 3 As shown, at least one partition beam 51 has a first hanging hole 514 corresponding to the first busbar 203. This allows the first busbar 203 and its connected structures to be hung using the first hanging hole 514, improving the structural reliability and stability of the connection. Finally, the last partition beam 51 has a second hanging hole 515 corresponding to the second busbar 204.

[0206] 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, electrically connected to the first busbar 203 of the adjacent battery pack 2, and detachably electrically connected to the first electrical portion 32; a second wiring harness 312, located within the front compartment V11, detachably electrically connected to the second electrical portion 33, and electrically connected to the first busbar 203 of the adjacent battery pack 2; and a third wiring harness 313, connected between the first and second wiring harnesses 311 and 312, positioned above the longitudinal beam 52 and passing through the transverse beam 51.

[0207] The final dividing beam 51 is fitted with multiple first fasteners 361, which are mounted on the first wiring harness 311. The foremost dividing beam 51 is fitted with multiple second fasteners 362, which are mounted on the second wiring harness 312. The dividing longitudinal beam 52 is fitted with multiple third fasteners 363, which are mounted on the third wiring harness 313.

[0208] Specifically, the longitudinal dividing beam 52 is lower than the transverse dividing beam 51. This allows the transverse dividing beam 51 to constrain the second wire harness 312 as it passes through the longitudinal dividing beam 52, preventing it from being too high and interfering with the second cover 15. Optionally, the longitudinal dividing beam 52 is flush with the lower transverse beam 511.

[0209] In some embodiments, the rear sidewall 12 includes a middle section 121 and side sections 122 connected to both sides of the middle section 121. The middle section 121 protrudes rearward relative to the side sections 122. A side access port 101 is located on the middle section 121. A pressure balancing valve 65 is installed 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 respectively connected to the left sidewall 13 and the right sidewall 14 outside the housing 1.

[0210] In some embodiments, such as Figure 33 As shown, the battery pack 100 also includes an insulating heat-insulating cover 81 for covering the separator assembly 5 to separate the separator assembly 5 from the battery pack 2. Specifically, a portion of the insulating 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.

[0211] The vehicle 1000 according to an embodiment of the present invention, such as Figure 38 As shown, it includes: a vehicle body 200 and a battery pack 100 as described in the above embodiment. The structure of the battery pack 100 will not be described in detail here. Figure 39As shown, a passenger space 220 is formed within the vehicle body 200, and the battery pack 100 is installed at the bottom of the vehicle body 200. By employing the aforementioned battery pack 100, the internal structure of the vehicle 1000 can be protected, the integrated design of the battery pack 100 and the vehicle 1000 can be improved, the number of parts can be reduced, and costs and weight can be lowered. Specifically, the battery pack 100 is installed at the bottom of the vehicle body 200. The bottom of the vehicle body 200 also forms an upwardly recessed cavity 240, and the rear end of the battery pack 100 is positioned directly opposite the upper recessed cavity 240. In this way, during maintenance, the first electrical component 32 within the side inspection port 101 can be inspected from the lower upper recessed cavity 240 without disassembling the entire vehicle, thus minimizing damage to the vehicle. Other configurations and operations of the vehicle 1000 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0212] In the description of this specification, references to the terms "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: The frame is used to enclose the receiving cavity; A partition assembly disposed within the frame to divide the receiving cavity into multiple receiving sub-cavities; A liquid cooling plate is located at the bottom of the frame. The liquid cooling plate has a bottom access port opposite to one of the receiving compartments. The liquid cooling plate is fixedly connected to the frame and at least to the partition assembly adjacent to the bottom access port. A bottom protective plate is detachably connected below the liquid cooling plate for opening and closing the bottom access port; the front sidewall of the frame is adjacent to the bottom access port; the bottom protective plate includes a bottom main plate, the upper surface of which is provided with an upwardly protruding thickened rib, one side of which is flush with one side of which is flush with the bottom main plate, and the projection surface of which is on the liquid cooling plate completely covers the bottom access port; the battery pack also includes: a high-voltage terminal and a low-voltage terminal, which are mounted on the front sidewall; The battery pack further includes: two liquid cooling connectors, which are connected to the liquid inlet and the liquid outlet of the liquid cooling plate via liquid cooling pipes, and are mounted on the front sidewall; a bottom access port is located between the liquid inlet and the liquid outlet; a partition beam extending in the left-right direction, and the receiving compartment including a front compartment located on one side of the partition beam, with the bottom access port located within the front compartment; The liquid cooling plate is provided with a plurality of first liquid cooling connection holes, at least some of which are positioned directly opposite the partition beam. The liquid cooling plate is fixedly connected to the partition beam through at least some of the first liquid cooling connection holes. The liquid cooling plate is provided with a plurality of first liquid cooling clearance holes, which are arranged around the bottom inspection port. At least a portion of the first liquid-cooling clearance hole is disposed opposite the partition beam on one side of the front compartment, and the bottom guard plate is detachably connected to the partition beam through at least a portion of the first liquid-cooling clearance hole.

2. The battery pack according to claim 1, characterized in that, The frame includes a front sidewall; The partition assembly includes: a partition longitudinal beam and at least two partition transverse beams, each partition transverse beam extending in the left-right direction, two adjacent partition transverse beams being spaced apart in the front-back direction, the partition longitudinal beam extending in the front-back direction, and a partition longitudinal beam connecting the middle of each pair of adjacent partition transverse beams to divide the space between the two adjacent partition transverse beams into two receiving cavities. The foremost dividing beam and the front sidewall define a front compartment, and the bottom inspection port, the liquid inlet and the liquid outlet of the liquid cooling plate are all located in the front compartment.

3. The battery pack according to claim 2, characterized in that, The liquid cooling plate is provided with a plurality of first liquid cooling connection holes and a plurality of second liquid cooling connection holes for fixed connection to the partition assembly and the frame. Some of the plurality of first liquid cooling connection holes are arranged facing the partition crossbeam and some are arranged facing the partition longitudinal beam. The plurality of second liquid cooling connection holes are arranged along the edge of the liquid cooling plate.

4. The battery pack according to claim 3, characterized in that, The liquid cooling plate is provided with a plurality of first liquid cooling clearance holes and a plurality of second liquid cooling clearance holes. The plurality of first liquid cooling clearance holes are arranged around the bottom inspection port, and the plurality of second liquid cooling clearance holes are arranged along the edge of the liquid cooling plate. The bottom protective plate is detachably connected to the top of the liquid cooling plate through the first liquid cooling clearance holes and the second liquid cooling clearance holes.

5. The battery pack according to claim 2, characterized in that, The fluid flow channel includes: Two sub-channels are located on both sides of the dividing longitudinal beam, and one end of each sub-channel is located in the front compartment to connect to the inlet of the liquid flow channel. The heat dissipation sub-channels are multiple and located on both sides of the dividing longitudinal beam. Each heat dissipation sub-channel is connected to the adjacent branch sub-channel and corresponds to a receiving cavity.

6. The battery pack according to claim 5, characterized in that, The fluid flow channel further includes: There are two reflux channels located on both sides of the dividing longitudinal beam. The end of each reflux channel located in the front compartment is connected to the outlet of the liquid flow channel.

7. The battery pack according to claim 6, characterized in that, The frame includes a left side wall and a right side wall, and the battery pack includes multiple battery groups distributed within the receiving cavity between the two separating crossbeams; The battery pack on the left side is spaced apart from the left side wall and forms a flow channel, while the battery pack on the right side is spaced apart from the right side wall and forms another flow channel. The two reflux channels are located directly below the two flow channels.

8. The battery pack according to any one of claims 1-7, characterized in that, The frame includes a rear sidewall, and a rear compartment is defined within the frame between the partition assembly and the rear sidewall; The electrical module of the battery pack includes a first electrical part and a second electrical part. The first electrical part is installed in the rear compartment, and the second electrical part is located above the bottom access port. A side access port is provided on the rear side wall opposite the first electrical part.

9. A vehicle, characterized in that, include: The battery pack according to any one of claims 1-8.

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