Battery pack and vehicle

Abstract

A battery pack and a vehicle. The battery pack comprises a case and an electric control structure; a side maintenance access port is formed in the case; the electric control structure is arranged in the case and directly faces the side maintenance access port; the electric control structure comprises a first BDU module; the first BDU module comprises a first electrical casing, a fuse, and a current sensor; a first opening facing the side maintenance access port is formed in the first electrical casing; the fuse and the current sensor are detachably arranged in the first electrical casing; and the current sensor is connected to the fuse in series.

Description

Battery packs and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed on December 29, 2023, with application number 202311871893.2 and patent application name “Battery Pack and Vehicle,” the entire contents of which are incorporated herein by reference. Technical Field

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

[0004] With the iteration and update of vehicle technology, the technology of battery-body integration continues to develop. This means that the battery pack is directly integrated into the chassis of the vehicle, achieving a higher degree of integration. The battery pack includes a shell, a top cover, a battery pack, and electrical connection components. The battery pack also includes a top cover, and the shell and the top cover define a mounting cavity. The battery pack and electrical connection components are arranged in the mounting cavity, and the battery pack and electrical connection components are located between the shell and the top cover. The top cover of the battery pack is located at the bottom of the vehicle body and serves as the chassis of the vehicle body, bearing the weight of the entire battery pack.

[0005] In the existing technical solutions, the types of disassembly, assembly and maintenance design of the battery pack's electronic control structure are limited. In order to improve integration and rationalize design, more types of electronic control structures need to be developed.

[0006] Summary of the Invention

[0007] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to propose a battery pack that separates the electrical modules and improves the convenience of inspection and maintenance.

[0008] The present application also proposes a vehicle.

[0009] According to an embodiment of the present application, the battery pack includes: a shell and an electronic control structure, the shell is provided with a side inspection port, the electronic control structure is arranged in the shell and is arranged opposite the side inspection port, the electronic control structure includes a first BDU module, the first BDU module includes: a first electrical shell, a fuse, and a current sensor, the first electrical shell is provided with a first opening facing the side inspection port, the fuse and current sensor are detachably arranged in the first electrical shell, and the current sensor is connected in series with the fuse.

[0010] According to the battery pack embodiment of the present application, the electronic control structure is configured in this manner, ensuring precise positioning of the fuses and current sensors, while also contributing to a compact structure. The provision of the first BDU module facilitates high-voltage switching and safety protection. Fuses and current sensors have a higher failure rate than other electrical components, so their removable configuration facilitates maintenance.

[0011] In some embodiments, a first positioning cavity and a second positioning cavity open toward the side inspection port are provided in the first electrical housing, the fuse is located in the first positioning cavity, and the current sensor is located in the second positioning cavity;

[0012] A first positioning boss is formed in the first electrical housing on at least one side of the first positioning cavity, and an end portion of the fuse is detachably connected to the first positioning boss;

[0013] A second positioning boss is formed on at least one side of the second positioning cavity in the first electrical shell, and the end of the current sensor is detachably connected to the second positioning boss.

[0014] Specifically, threaded holes are provided on surfaces of the first positioning boss and the second positioning boss facing the side inspection port, the fuse is connected to the first positioning boss by bolts, and the current sensor is connected to the second positioning boss by bolts.

[0015] Furthermore, the first positioning boss and the second positioning boss are staggered in height and have different distances from the side inspection opening.

[0016] Optionally, at least one first positioning boss is provided in the first electrical housing, a second threaded hole is provided on a rear surface of the first positioning boss, a first positioning cavity is defined between the at least one first positioning boss, the fuse is located in the first positioning cavity, both ends of the fuse are connected to the at least one first positioning boss by a second bolt, and each second bolt is threadedly engaged in the second threaded hole;

[0017] At least one second positioning boss is provided on the first electrical shell, and a third threaded hole is provided on the rear surface of the second positioning boss. A second positioning cavity is defined between at least one of the second positioning bosses, and the current sensor is located in the second positioning cavity. Both ends of the current sensor are connected to at least one of the second positioning bosses by third bolts, and each of the third bolts is threadedly engaged in the third threaded hole.

[0018] Furthermore, at least one of the first positioning bosses is arranged in the left-right direction, and at least one of the second positioning bosses is arranged in the left-right direction. At least one of the second positioning bosses is different in height from at least one of the first positioning bosses, and rear surfaces of the first positioning bosses and rear surfaces of the second positioning bosses are staggered in the front-to-back direction.

[0019] The projections of the second bolt and the third bolt on the rear side wall are both located within the side inspection opening.

[0020] Advantageously, the first BDU module also includes: a first conductive plate, which is located in the first positioning cavity and on the side of the fuse away from the side inspection port; part of the side edge of the first conductive plate is bent and connected to a first positioning boss after extending laterally to be electrically connected to the fuse; part of the upper edge of the first conductive plate is bent and connected to a second positioning boss after extending upward to be electrically connected to the current sensor.

[0021] A second positioning boss is located directly above a first positioning boss, and a left-right dimension of the current sensor is smaller than a left-right dimension of the fuse.

[0022] Specifically, the first electrical shell is provided with a second opening at the top, and the first BDU module also includes: a top protective cover and two second conductive plates, the two second conductive plates are arranged at intervals on the left and right sides of the top of the first electrical shell, and each second conductive plate extends in the front-to-back direction.

[0023] The battery pack further includes a battery pack, wherein a rear end of one second conductive sheet is bent downward and rests on a first positioning boss and is electrically connected to the fuse, and a rear end of another second conductive sheet is bent downward and rests on a second positioning boss and is electrically connected to the current sensor, and the front ends of the two second conductive sheets are respectively connected to the battery pack via copper busbars;

[0024] The top protective cover is detachably connected to the top of the first electrical housing and covers the two second conductive sheets.

[0025] Optionally, the current sensor has a first plug interface on the rear side, and the top protective cover is provided with a first through hole facing the first plug interface.

[0026] Optionally, a limiting groove extending forward and backward is provided on the top surface of the top protective cover, and the front end of the limiting groove is arranged opposite to the first through-hole;

[0027] The top protective cover is further provided with a limiting protrusion on at least one side of the limiting groove.

[0028] In some embodiments, the electrical control structure further includes a BMS main control board and a BMS slave control board. The BMS main control board and the BMS slave control board are located on both sides of the first BDU module and are both arranged facing the side inspection port.

[0029] The vehicle according to an embodiment of the present application includes: a vehicle body, wherein a passenger space is formed in the vehicle body; and the battery pack as described in the above embodiment, wherein the battery pack is installed at the bottom of the vehicle body.

[0030] The vehicle according to the embodiment of the present application can improve the integration of the vehicle by adopting the above-mentioned battery pack. After optimizing the structure of the battery pack, it is convenient to inspect and repair the battery pack failure.

[0031] Specifically, a mounting opening is formed at the bottom of the vehicle body, and the battery pack is located in the mounting opening;

[0032] An upwardly concave cavity is further formed at the bottom of the vehicle body, and the rear end of the battery pack is arranged facing the upper concave cavity.

[0033] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] FIG1 is an overall schematic diagram of a battery pack according to an embodiment of the present application;

[0036] FIG2 is a schematic diagram showing the positional relationship between the electrical module and the battery pack according to an embodiment of the present application from one viewing angle;

[0037] FIG3 is an exploded view of a battery pack according to an embodiment of the present application at one viewing angle;

[0038] FIG4 is a schematic diagram showing the positional relationship between the electrical module and the battery pack according to an embodiment of the present application from another perspective;

[0039] FIG5 is a structural diagram of a battery pack according to an embodiment of the present application when components are hidden from one viewing angle;

[0040] FIG6 is a structural diagram of a battery pack according to an embodiment of the present application when components are hidden from another perspective;

[0041] FIG7 is a schematic structural diagram of a wiring harness of an electrical module according to an embodiment of the present application;

[0042] FIG8 is a schematic top view of an electrical module according to an embodiment of the present application;

[0043] FIG9 is a front view schematic diagram of a partial structure of an electrical module according to an embodiment of the present application;

[0044] FIG10 is a schematic structural diagram of a battery pack with its side access cover opened according to an embodiment of the present application;

[0045] FIG11 is a schematic diagram of a partial structure of a battery pack with a hidden wiring harness and a side access cover open according to an embodiment of the present application;

[0046] FIG12 is a schematic diagram of a partial top view of the housing and the support frame according to an embodiment of the present application;

[0047] FIG13 is a schematic diagram of a partial top view of the housing, support frame, and mounting plate according to an embodiment of the present application;

[0048] FIG14 is a schematic diagram of the partial structure of the housing, the support frame, and the mounting plate from another perspective according to an embodiment of the present application;

[0049] FIG15 is a schematic rear structural diagram of a housing and a support frame according to an embodiment of the present application;

[0050] FIG16 is a schematic diagram of the assembly structure of a BMS main control board according to an embodiment of the present application at one viewing angle;

[0051] FIG17 is a schematic diagram of the assembly structure of the BMS main control board according to an embodiment of the present application from another perspective;

[0052] FIG18 is a schematic diagram of the assembly structure of a BMS slave control board from one perspective according to an embodiment of the present application;

[0053] FIG19 is a schematic diagram of the assembly structure of a BMS slave control board from another perspective according to an embodiment of the present application;

[0054] FIG20 is a schematic structural diagram of a first BDU module at one viewing angle according to an embodiment of the present application;

[0055] FIG21 is an exploded schematic diagram of the first BDU module according to an embodiment of the present application from another perspective;

[0056] FIG22 is an exploded schematic diagram of a battery pack according to an embodiment of the present application from another perspective;

[0057] FIG23 is a partial enlarged view of FIG22;

[0058] FIG24 is a schematic structural diagram of a second electrical part according to an embodiment of the present application;

[0059] FIG25 is an exploded view of a second electrical part according to an embodiment of the present application;

[0060] FIG26 is a schematic structural diagram of a shock-absorbing column according to an embodiment of the present application;

[0061] FIG27 is a schematic diagram of a partial structure of a second electrical housing according to an embodiment of the present application;

[0062] FIG28 is a schematic structural diagram of a bottom guard plate and an upper buffer layer thereof according to some embodiments of the present application;

[0063] FIG29 is a schematic diagram of a partial structure of a bottom guard plate according to other embodiments of the present application;

[0064] FIG30 is a schematic diagram of frame side beams and mounting beams according to yet other embodiments of the present application;

[0065] FIG31 is an overall schematic diagram of a vehicle according to an embodiment of the present application;

[0066] Figure 32 is a position relationship diagram of the battery pack in the vehicle body according to an embodiment of the present application.

[0067] 1 , a first flexible wire 3111 , a first plug connector 3112 , a second flexible wire 3113 , a second plug connector 3114 , a third flexible wire 3115 , a third plug connector 3116 , a second wire harness 312 , a second signal transmission interface 3121 , a third wire harness 313 , a fourth wire harness 314 , a second signal transmission interface 3121 , a third wire harness 313 , a fourth wire harness 314 , High-voltage electrical terminal 315, low-voltage electrical terminal 316, copper busbar 317, electrical control structure 32, first BDU module 321, first electrical housing 3211, first opening 3211a, second opening 3211b, first positioning boss 3211c, second threaded hole 3211d, first positioning cavity 3211e, second positioning boss 3211f, third threaded hole 3211g, second positioning cavity 3211h, fuse 3212, current sensor 3213, first plug port 32131, first conductive sheet 3214, second conductive sheet 3215, top protective cover 3216, first through-hole 3216a, limiting groove 3216b, limiting protrusion 3216c, first buckle portion 3216d, side protective cover 3217, second buckle portion 3217a, curved panel 3217b, BMS master control board 322, second socket 3221, BMS slave control board 323, third socket 3231, mounting plate 324, flange 3241, mounting hole 3242, first bolt 3291, second bolt 3292, third bolt 3293, fourth bolt 3294, fifth bolt 3295, second electrical portion 33, fourth flexible wire 331, second electrical housing 332, shock absorbing column 333, thick column section 3331, thin column section 3332, center hole 3333, first extension plate 3351, second extension plate 3352, mating hook 33521, lower protrusion 336, second through-hole 3361, wire fastener 3362, main relay 337, power strip 338, first signal transmission interface 339; Support frame 4, supporting longitudinal rod 40, first longitudinal rod 401, second longitudinal rod 402, third longitudinal rod 403, fourth longitudinal rod 404, supporting cross bar 41, first threaded hole 411, avoidance groove 412;Partition assembly 5, crossbar 51, lower crossbar 511, upper crossbar 512, first notch 5131, second notch 5132, third notch 5133, longitudinal beam 52, seat mounting nut 53, front cavity 54, rear cavity 55, accommodating sub-cavity 56, circulation channel 561, circulation channel width x1, liquid cooling plate 6, liquid cooling pipe 601, liquid cooling connector 602, bottom access port 61, fastening bolt 611, sealing ring 62, bottom access cover 63, side access cover 64, air pressure balance valve 65, seat fixing fastener 66, fixing plate 67; vehicle body 200, passenger compartment 220, mounting port 230, upper recessed cavity 240. DETAILED DESCRIPTION

[0068] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0069] In the description of the present application, it should be understood that the terms ", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, "plurality" means two or more.

[0070] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0071] The following describes a battery pack 100 according to an embodiment of the present application with reference to the accompanying drawings. The battery pack 100 according to an embodiment of the present invention includes an electronic control structure 32 , which extends along a first direction D1 or a second direction D2 of the battery pack 100 . To facilitate understanding of the electronic control structure 32 , the following describes the structure of the battery pack 100 in conjunction with some embodiments.

[0072] As shown in FIG. 1 to FIG. 6 , a battery pack 100 according to an embodiment of the present application includes: a housing 1 , a battery pack 2 and an electrical module 3 .

[0073] The housing 1 has a front side wall 11 and a rear side wall 12 , and a side inspection opening 101 is provided on the rear side wall 12 . The battery pack 2 is located in the housing 1 .

[0074] The electrical module 3 is installed in the housing 1. The electrical module 3 includes an electrical connection structure 31 and an electrical control structure 32. In some embodiments, the electrical module 3 is a split structure, that is, the electrical module 3 includes the electrical connection structure 31, the electrical control structure 32, and a second electrical part 33, and the electrical control structure 32 is equivalent to the first electrical part. The electrical control structure 32 is located on the rear side of the battery pack 2 and is arranged directly opposite the side inspection port 101. The second electrical part 33 is located on the front side of the battery pack 2. The electrical connection structure 31 is used to electrically connect with the electrical control structure 32, the second electrical part 33, and the battery pack 2. The electrical module 3 also includes a high-voltage electrical terminal 315 and a low-voltage electrical terminal 316 provided on the electrical connection structure 31. The high-voltage electrical terminal 315 and the low-voltage electrical terminal 316 are installed on the housing 1.

[0075] It should be noted that the terms "high voltage" and "low voltage" herein do not limit specific voltage values, but rather their relative values. The high voltage value is typically the power supply voltage of the battery pack 100, while the low voltage value is typically the signal transmission voltage within the battery pack 100.

[0076] It is understood that the battery pack 100 has a wide range of applications. Depending on the installation location of the battery pack 100, the battery pack 100 can be adaptively adjusted in the first direction D1 and the second direction D2. Both the first direction D1 and the second direction D2 are perpendicular to the height direction, and the height direction of the battery pack 100 is the up-down direction shown in FIG1 . When installed on a vehicle 1000, the first direction D1 is the front-to-back direction, and the second direction D2 is the left-to-right direction.

[0077] In existing technology, the electrical modules of a battery pack include a BDU (Battery Disconnect Unit) and a BMS (Battery Management System). The BDU implements high-voltage on / off and safety protection functions under the control of the BMS. In actual applications, the electrical modules are concentrated on one side of the battery pack, and a long busbar is provided to achieve electrical connections within the battery pack. There are at least three long busbars.

[0078] The present application divides the electrical module 3 into an electrical control structure 32 and a second electrical part 33, which can reduce the circuit connections running through the front and back of the battery pack 100, thereby reducing the application cost of the electrical connection and the weight of the battery pack 100, and optimizing the electrical layout within the battery pack 100.

[0079] According to the battery pack 100 of the embodiment of the present application, by configuring the electrical module 3 as the electrical control structure 32 and the second electrical part 33, the electrical layout within the battery pack 100 can be facilitated, and the spatial arrangement of the electrical module 3 within the battery pack 100 can be optimized. In the prior art, the space occupied by the electrical modules in the battery pack is smaller than the space occupied by the battery pack, and the height of some electrical modules is larger than the height of the battery pack. In order to accommodate the electrical modules in the housing, the size of the housing needs to be increased, which also increases the size of the entire battery pack and reduces the utilization rate of the internal space of the battery pack. In the present application, the optimized design can facilitate the reduction of the height of the electrical module 3, for example, making the height of the battery pack 2 greater than or equal to the height of the electrical module 3, thereby avoiding the increase in the size of the battery pack 100 due to the excessive height of the electrical module 3 and improving the utilization rate of the internal space of the battery pack 100.

[0080] The height dimensions of each component herein refer to the dimensions of the component in the height direction (i.e., the up-down direction in FIG. 1 ).

[0081] In some embodiments, as shown in FIG. 1 and FIG. 3 , the housing 1 includes a frame 10 , a top plate 16 connected to the top of the frame 10 , and a bottom guard plate 15 connected to the bottom of the frame 10 .

[0082] Specifically, the shape of the frame 10 usually determines the overall shape of the battery pack 100, and the frame 10 is a square frame or a hexagonal frame, etc. The common frame 10 is a quadrilateral. Specifically, the frame 10 is formed by connecting the side beams on four sides end to end, and each side beam constitutes a side wall of the shell 1, and they are the front side wall 11, the rear side wall 12, the left side wall 13, and the right side wall 14 respectively. Each side beam can be a steel section, or can be made of rolled steel. Furthermore, a mounting beam 17 is connected to the frame 10, and the mounting beam 17 can be installed on the side beam, for example, the front side wall 11, the rear side wall 12, the left side wall 13, and the right side wall 14 are all equipped with a mounting beam 17. Furthermore, when the battery pack 100 is assembled, the side beams of the frame 10 are connected to the top plate 16 and the bottom guard plate 15 by bolts to improve the connection reliability.

[0083] Optionally, during assembly, the top of the battery pack 2 is directly glued to the top plate 16, so that the two are combined into an inseparable whole. Optionally, during assembly, the bottom of the battery pack 2 is directly glued to the bottom guard plate 15, so that the two are combined into an inseparable whole. Of course, the present application is not limited to this. The bottom guard plate 15 can also be configured as a detachable connection structure to facilitate disassembly and maintenance of the battery pack 100 from the bottom. The top plate 16 can also be configured as a detachable connection structure to facilitate disassembly and maintenance of the battery pack 100 from the top.

[0084] In some embodiments, as shown in Figures 6-8 , the electrical control structure 32 includes a first BDU module 321, a BMS main control board 322, and a BMS slave control board 323. The first BDU module 321 is located between the BMS main control board 322 and the BMS slave control board 323. The second electrical section 33 includes a second BDU module. The BMS main control board 322 and the BMS slave control board 323 are located on either side of the first BDU module 321 and are both located directly opposite the side access port 101.

[0085] Specifically, the BMS main control board 322 and the BMS slave control board 323 implement high-voltage on / off and safety protection functions by controlling the first BDU module 321 and the second BDU module. The BMS main control board 322 and the BMS slave control board 323 communicate with each other via the wiring harness of the electrical connection structure 31. The BMS main control board 322 and the BMS slave control board 323 communicate with the first and second BDU modules via the wiring harness of the electrical connection structure 31. The first BDU module 321 is located in the middle of the battery pack 2 in the second direction D2, and the second BDU module is connected to the battery pack 2 via a copper busbar 317. In the electrical control structure 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 shown in FIG. 7 and includes multiple wiring harnesses.

[0086] Here, the first BDU module 321 is placed between the BMS master control board 322 and the BMS slave control board 323, centered on the first BDU module 321. This facilitates symmetry in the connection between the first BDU module 321 and the battery pack 2. When voltage splitting protection is required for the battery pack 2, the first BDU module 321 is symmetrical with the two battery groups 20 of the battery pack 2.

[0087] Specifically, the BMS main control board 322 and the BMS slave control board 323 are detachably arranged through the side inspection port 101. It can be understood that in terms of failure frequency, the failure rate of the BMS main control board 322 and the BMS slave control board 323 is higher, so they are set to be detachably connected to facilitate direct removal for maintenance and inspection in case of failure.

[0088] For example, the first electrical module 3 includes at least one BMS slave control board 323, which can collect and transmit battery cell data of the battery pack 2 and transmit it to the BMS master control board 322 via the electrical connection structure 31. Therefore, the BMS slave control board 323 can be set according to the number of battery cells 201 in the battery pack 2.

[0089] Specifically, there are two BMS slave control boards 323, which are stacked in the height direction. The BMS slave control boards 323 measure 86.5 mm in the first direction D1, 240 mm in the second direction D2, and 19.7 mm in height. When stacked, the two BMS slave control boards 323 stand at a height of 48.7 mm. The BMS master control board 322 measures 102 mm in the first direction D1 and 260 mm in the second direction D2, with a height of 24 mm. The first BDU module 321 measures 103 mm in the first direction D1, 153 mm in the second direction D2, and 85.5 mm in height. Along the second direction D2, the combined dimensions of the BMS slave control boards 323, BMS master control board 322, and first BDU module 321 in the electrical control structure 321 are at least 653 mm.

[0090] As shown in FIG. 10 and FIG. 11 , the height dimensions of the electric control structure 321 and the second electrical part 302 are both lower than the battery pack 2 .

[0091] In some specific embodiments, as shown in Figures 17, 18, and 11, BMS slave panels 323 are arranged in a horizontal direction. There are at least two BMS slave panels 323 stacked in the vertical direction, and the projections of all BMS slave panels 323 on the rear side wall 12 are completely located within the side access opening 101. This allows the BMS slave panels 323 to be directly pulled horizontally during assembly and disassembly, reducing the risk of bumps caused by tilting. Furthermore, when the side access opening 101 is open, the status of the BMS slave panels 323 can be more intuitively observed even without removing them.

[0092] As shown in Figures 18, 19, and 11, the BMS main control board 322 is positioned horizontally, with its projection on the rear sidewall 12 completely within the side access opening 101. This allows the BMS main control board 322 to be pulled horizontally during assembly and disassembly, minimizing the risk of bumps and bumps caused by tilting. Furthermore, when the side access opening 101 is open, the status of the BMS slave control board 323 can be readily observed, even without removing the BMS main control board 322.

[0093] In some embodiments, as shown in Figures 12-14 , the battery pack 100 further includes a support frame 4 , which is located within the housing 1 . The electronic control structure 32 is mounted on the support frame 4 . The support frame 4 provides support for the electronic control structure 32 , reducing shaking of the electronic control structure 32 during movement of the battery pack 100 , thereby improving the safety of the battery pack 100 . Furthermore, the provision of the support frame 4 also elevates the electronic control structure 32 , making it more aligned with the side inspection port 101 .

[0094] The support frame 4 is provided with a plurality of first threaded holes 411 on a side facing the side access opening 101. These first threaded holes 411 are distributed sequentially along the second direction D2. The BMS main control board 322 and the BMS slave control board 323 can be directly or indirectly connected to the support frame 4 via bolts, and are connected to the first threaded holes 411 for easy assembly and disassembly.

[0095] In some embodiments, the electric control structure 32 includes two mounting plates 324 , the BMS master control board 322 and the BMS slave control board 323 are respectively mounted on their respective mounting plates 324 , and the mounting plates 324 are fixed in the housing 1 by first bolts 3291 .

[0096] The first bolt 3291 is arranged along the front-to-back direction, the head of the first bolt 3291 is located at the rear end, and the projection of the first bolt 3291 on the rear side wall 12 is located inside the side inspection opening 101 .

[0097] Specifically, as shown in FIG16 , the BMS main control board 322 is connected to a mounting plate 324 , for example, by being fixedly connected by vertically arranged bolts as shown in the figure.

[0098] Specifically, as shown in FIG. 18 , the BMS slave control board 323 is connected to another mounting plate 324 , for example, by being fixedly connected by vertically arranged bolts as shown in the figure.

[0099] Specifically, as shown in Figures 13 and 14, during assembly, the mounting plate 324 with the BMS main control board 322 or the BMS slave control board 323 is placed on the support frame 4, and a downwardly extending flange 3241 is formed on the side of the mounting plate 324 facing the side inspection port 101. The flange 3241 is provided with a mounting hole 3242 corresponding to the first threaded hole 411, and the first bolt 34 is passed through the mounting hole 3242 and the first threaded hole 411 in sequence for fixation.

[0100] As shown in Figures 12 to 14, the support frame 4 includes four support beams 41 distributed along the first direction D1, and each support beam 41 extends along the second direction D2, two of which are close to the side inspection port 101, and the other two support beams 41 are away from the side inspection port 101. A first threaded hole 411 is provided on each support beam 41, and an avoidance groove 412 is provided on the support beam 41 close to the side inspection port 101, and the avoidance groove 412 corresponds to the first threaded hole 411 away from the side inspection port 101.

[0101] The mounting plate 324 is provided with two flanges 3241 extending along a first direction D1, each flange 3241 being provided with a mounting hole 3242. The mounting plate 324 is placed on the support frame 4. A downwardly extending flange 3241 is formed on the side of the mounting plate 324 facing the side access opening 101. The flange 3241 is provided with mounting holes 3242 corresponding to the first threaded holes 411. The first bolt 34 can pass through the mounting holes 3242 and the first threaded holes 411 in sequence to secure the mounting plate 324 to the support frame 4. The first bolt 34 is positioned on the support frame 4 along a second direction D2, reducing interference during assembly and disassembly, thereby improving installation or disassembly efficiency. The flange 3241 also serves to locate the mounting position of the mounting plate 324 and assist in securing the mounting plate 324 to the support frame 4. The flange 3241 of the mounting plate 324 extends downward toward the side access opening 101. The flange 3241 is a single long strip, and mounting holes 3242 are provided at positions corresponding to the first threaded holes 411. Alternatively, the flange 3241 can be a long strip with avoidance grooves 412, and the flanges 3241 are provided at positions corresponding to the first threaded holes 411.

[0102] In some specific embodiments, as shown in Figures 12 and 13, the support frame 4 further includes four supporting longitudinal rods 40, each of which extends along the first direction D1. The four supporting longitudinal rods 40 are respectively and sequentially arranged as a first longitudinal rod 401, a second longitudinal rod 402, a third longitudinal rod 403, and a fourth longitudinal rod 404. A supporting crossbar 41 is connected between the first longitudinal rod 401 and the second longitudinal rod 402, and a supporting crossbar 41 is connected between the third longitudinal rod 403 and the fourth longitudinal rod 404.

[0103] The electronic control structure 32 includes two detachable components, which are located on the support crossbars 41 on either side. Thus, the longitudinal support bars 40 and crossbars 41 in the support frame 4 can support the detachable components. By configuring the support frame 4 as a combination of the support bars 40 and crossbars 41, compared to configuring the support frame 4 as a single support plate, the support bars 40 are lightweight, ensuring structural strength while reducing the weight of the entire battery pack 100. Furthermore, the manufacturing process for the support bars 40 is simple, reducing production costs and improving production efficiency.

[0104] Specifically, a support crossbar 41 is connected between the first longitudinal bar 401 and the second longitudinal bar 402. Two support crossbars 41 are arranged along the first direction D1, and each support crossbar 41 includes a mounting hole 3242. The support crossbar 41 located toward the front of the first direction D1 is the first support crossbar, while the support crossbar 41 located toward the rear of the first direction D1 is the second support crossbar. The height of the second support crossbar is partially greater than that of the first support crossbar 41, allowing the mounting hole 3242 on the second support crossbar to be fully exposed. At the mounting hole 3242, the first and second support crossbars have the same height.

[0105] Furthermore, the BMS slave control board 323 is detachably connected to the first longitudinal rod 401 and the second longitudinal rod 402 via a mounting plate 324 , and the BMS master control board 322 is detachably connected to the third longitudinal rod 403 and the fourth longitudinal rod 404 via another mounting plate 324 .

[0106] Furthermore, the first BDU module 321 can be installed on the second longitudinal rod 402 and the third longitudinal rod 403. For example, the first BDU module 321 includes a first electrical shell 3011, and the first electrical shell 3011 is connected to the second longitudinal rod 402 and the third longitudinal rod 403 by vertically arranged bolts.

[0107] In some embodiments, as shown in Figures 10, 20, and 21, the first BDU module 321 includes: a first electrical shell 3211 and a fuse 3212. The first electrical shell 3211 is provided with a first opening 3211a facing the side inspection port 101. Specifically, the first electrical shell 3211 is provided with a first opening 3211a on the rear side, and the fuse 3212 is detachably arranged in the first electrical shell 3211.

[0108] Specifically, the fuse 3013 is detachably connected to the first electrical housing 3011. When the battery pack 100 fails and the electrical connection is cut off, the fuse 3013 needs to be replaced or manually reset.

[0109] Specifically, the first BDU module 321 also includes a side cover 3217, which removably covers the first opening 3211a. The first electrical housing 3211 and the side cover 3217 protect the internal electrical components of the first BDU module 321, such as the fuse 3212. Furthermore, internal electrical components such as the fuse 3212 are positioned within the first electrical housing 3211, enabling secure installation and improving the convenience and reliability of the fixed connection.

[0110] Furthermore, as shown in FIG. 21 , second buckling portions 3217 a are provided at both ends of the side protective cover 3217 , and the side protective cover 3217 can be buckled and connected to the first electrical housing 3211 through the second buckling portions 3217 a .

[0111] In some specific embodiments, as shown in FIG21 , the side cover 3217 includes a curved panel 3217b positioned between the second snap-fit ​​portions 3217a on either side. Its shape matches the fuse 3212, improving compactness and securing the fuse 3212. The curved panel 3217b can be a circular arc plate. Optionally, the curved panel 3217b can be a grille plate to enhance heat dissipation. The provision of a connecting structure with the second snap-fit ​​portions 3217a improves connection stability and convenience. By configuring the side cover 3217 as an arc-shaped grille plate, the structural strength of the side cover 3217 can be enhanced.

[0112] Specifically, the first BDU module 321 also includes a current sensor 3213, which is connected in series with the fuse 3212 and is detachably disposed within the first electrical housing 3211. This allows the current sensor 3213 to promptly detect the current flowing through the fuse 3212, enabling the BMS slave control board 323 to promptly determine whether the fuse 3212 needs to be blown.

[0113] Here, the internal circuit structure and specific working principles of the fuse 3212, the current sensor 3213, the BMS main control board 322, and the BMS slave control board 323 are all existing technologies and will not be repeated here.

[0114] Specifically, as shown in Figure 21, the fuse 3212 is fixed to the first electrical shell 3211 by a second bolt 3292, the head of the second bolt 3292 is set toward the side inspection port 101, and the projection of the second bolt 3292 on the rear side wall 12 is located inside the side inspection port 101, thereby improving the reliability and stability of the connection of the fuse 3212 to the first electrical shell 1.

[0115] When the fuse 3212 fails and needs to be replaced, first unlock the second latch portion 3217a, so that the side cover 3217 is separated from the first electrical shell 3211 to expose the second bolt 3292, then unscrew the second bolt 3292 to release the fixed connection between the fuse 3212 and the first electrical shell 3211, and finally remove the faulty fuse 3212 through the side inspection port 101.

[0116] Similarly, the current sensor 3213 is fixed to the first electrical shell 3211 by a third bolt 3293. The head of the third bolt 3293 is set toward the side inspection port 101, and the projection of the third bolt 3293 on the rear side wall 12 is located inside the side inspection port 101, thereby improving the reliability and stability of the current sensor 3213 connected to the first electrical shell 1.

[0117] When the current sensor 3213 fails and needs to be replaced, first unlock the second latch portion 3217a, so that the side cover 3217 is separated from the first electrical shell 3211 to expose the third bolt 3293, then unscrew the third bolt 3293 to release the fixed connection between the current sensor 3213 and the first electrical shell 3211, and finally remove the faulty current sensor 3213 through the side inspection port 101.

[0118] In some embodiments, as shown in FIG21 , a first positioning cavity 3211e and a second positioning cavity 3211h are provided within the first electrical housing 3211, both of which are open toward the side access opening 101. The fuse 3212 is located within the first positioning cavity 3211e, and the current sensor 3213 is located within the second positioning cavity 3211h. Thus, the first positioning cavity 3211e and the second positioning cavity 3211h are used to position the fuse 3212 and the current sensor 3213, respectively, for ease of assembly.

[0119] Specifically, a first positioning boss 3211c is formed on at least one side of the first positioning cavity 3211e in the first electrical housing 3211, and the end of the fuse 3212 is detachably connected to the first positioning boss 3211c. The fuse 3212 is fixedly connected to the side, which reduces obstacles to the fuse 3212.

[0120] A second positioning boss 3211f is formed on at least one side of the second positioning cavity 3211h in the first electrical housing 3211. The end of the current sensor 3213 is detachably connected to the second positioning boss 3211f. The current sensor 3213 is fixedly connected to the side, which reduces obstacles to the current sensor 3213.

[0121] Furthermore, threaded holes are provided on the surfaces of the first and second positioning bosses 3211c, 3211f facing the side access opening 101. The fuse 3212 is bolted to the first positioning boss 3211c, and the current sensor 3213 is bolted to the second positioning boss 3211f. Bolted connection is convenient and quick, and does not obstruct vision.

[0122] In some specific embodiments, as shown in Figure 21, two first positioning bosses 3211c are provided in the first electrical shell 3211, and the rear surface of the first positioning boss 3211c is provided with a second threaded hole 3211d. A first positioning cavity 3211e is defined between the two first positioning bosses 3211c. The fuse 3212 is located in the first positioning cavity 3211e. Both ends of the fuse 3212 are connected to the two first positioning bosses 3211c by second bolts 3292, and each second bolt 3292 is threadedly engaged in the second threaded hole 3211d.

[0123] Two second positioning bosses 3211f are provided on the first electrical shell 3211, and a third threaded hole 3211g is provided on the rear surface of the second positioning boss 3211f. A second positioning cavity 3211h is defined between the two second positioning bosses 3211f. The current sensor 3213 is located in the second positioning cavity 3211h. Both ends of the current sensor 3213 are connected to the two second positioning bosses 3211f through third bolts 3293. Each third bolt 3293 is threadedly engaged in the third threaded hole 3211g.

[0124] In this way, the fuse 3212 and the current sensor 3213 are accurately positioned, and the structure is made compact.

[0125] Optionally, the first positioning boss 3211 c and the second positioning boss 3211 f are staggered in height and have different distances from the side inspection opening 101 .

[0126] Furthermore, the two first positioning bosses 3211c are arranged in the left-right direction, while the two second positioning bosses 3211f are also arranged in the left-right direction. The two second positioning bosses 3211f are at a different height than the two first positioning bosses 3211c, and the rear surfaces of the first positioning bosses 3211c and the rear surfaces of the second positioning bosses 3211f are staggered in the front-to-back direction. This arrangement allows the fuse 3212 and current sensor 3213 to be staggered in the front-to-back direction during assembly and disassembly, which helps reduce the size of the first BDU module 321 in both the height and front-to-back directions.

[0127] Specifically, first positioning boss 3211c is located below second positioning boss 3211f, thereby installing fuse 3212 below current sensor 3213. Furthermore, fuse 3212 is located behind current sensor 3213, closer to side access port 101. This arrangement makes fuse 3212, which has a higher failure rate, easier to remove, considering its failure frequency.

[0128] Advantageously, as shown in FIG21 , the first BDU module 321 further includes a first conductive sheet 3214, which is located within the first positioning cavity 3211e and in front of the fuse 3212. The first conductive sheet 3214 is located on the side of the fuse 3212 away from the side access opening 101. A second positioning boss 3211f is located directly above the first positioning boss 3211c. The left-right dimension of the current sensor 3213 is smaller than that of the fuse 3212. A portion of the side edge of the first conductive sheet 3214 extends laterally, then bends and connects to the first positioning boss 3211c to electrically connect to the fuse 3212. A portion of the upper edge of the first conductive sheet 3214 extends upward, then bends and connects to the second positioning boss 3211f to electrically connect to the current sensor 3213.

[0129] With this arrangement, the fuse 3212 and the current sensor 3213 are connected in series using the first conductive sheet 3214 . The first conductive sheet 3214 is not easily detached and has high reliability. The width of the first conductive sheet 3214 can be set larger, which is beneficial to reducing resistance, etc.

[0130] Specifically, as shown in Figure 21, the first electrical housing 3211 has a second opening 3211b at the top. The first BDU module 321 also includes a top cover 3216 and two second conductive plates 3215. The two second conductive plates 3215 are spaced apart and arranged on the top of the first electrical housing 3211. Each second conductive plate 3215 extends in the front-to-back direction.

[0131] The rear end of one second conductive sheet 3215 is bent downward and rests on a first positioning boss 3211c, electrically connected to the fuse 3212. The rear end of the other second conductive sheet 3215 is bent downward and rests on a second positioning boss 3211f, electrically connected to the current sensor 3213. The front ends of the two second conductive sheets 3215 are connected to the battery pack 2 via copper busbars 317. A top protective cover 3216 is removably attached to the top of the first electrical housing 3211 and covers the two second conductive sheets 3215.

[0132] The provision of the top protective cover 3216 not only facilitates disassembly, assembly, and maintenance, but also provides a certain degree of positional constraint on the second conductive sheet 3215. This arrangement provides high electrical reliability and more flexible parts replacement.

[0133] Optionally, as shown in FIG. 20 and FIG. 21 , the current sensor 3213 has a first plug interface 32131 on the rear side, and the top protective cover 3216 is provided with a first through hole 3216 a facing the first plug interface 32131 .

[0134] As shown in Figures 7 and 8, the electrical connection structure 31 includes: a first flexible wire 3111 located on the rear side of the first BDU module 321, and a first plug connector 3112 is provided at the end of the first flexible wire 3111. The first plug connector 3112 is plugged into the first plug interface 32131 through the first through-hole 3216a.

[0135] During assembly and disassembly, the first plug connector 3112 can be directly removed from the side access opening 101. The first flexible wire 3111 can then be unplugged to inspect the internal structure of the first BDU module 321 or to perform assembly and disassembly. Once assembly is complete, the first plug connector 3112 can be directly inserted from the rear, making assembly extremely convenient and reducing interference from tangled wires.

[0136] Optionally, as shown in Figures 20 and 21 , a retaining groove 3216b extending forward and backward is provided on the top surface of the top protective cover 3216. The front end of the retaining groove 3216b is positioned opposite the first perforation 3216a, and a portion of the first flexible conductor 3111 is positioned within the retaining groove 3216b. The retaining groove 3216b can constrain the first flexible conductor 3111, reducing its shaking during vibrations and the chance of loosening due to shaking. Furthermore, compared to other conductors, the first flexible conductor 3111 is thinner and lighter, which can improve connection reliability and enhance the safety of the battery pack 100.

[0137] Optionally, a limiting protrusion 3216c is provided on at least one side of the limiting groove 3216b on the top protective cover 3216 to further constrain the first flexible wire 3111 and improve its safety. Furthermore, as shown in FIG21 , two limiting protrusions 3216c are provided on the top protective cover 3216, each of which has a barb at the end to facilitate hooking the first flexible wire 3111.

[0138] 21, the top cover 3216 is provided with first buckle portions 3216d at both ends, and the top cover 3216 can be buckled and connected to the first electrical housing 3211 through the first buckle portions 3216d. By providing the first buckle portion 3216d connection structure, the stability and convenience of the connection are improved.

[0139] In some embodiments, as shown in Figures 7, 8, and 10, a second plug interface 3221 is provided on the rear side of the BMS main control board 322, and a third plug interface 3231 is provided on the rear side of the BMS slave control board 323. The electrical connection structure 31 also includes a second flexible wire 3113 located on the rear side of the BMS main control board 322. The end of the second flexible wire 3113 is provided with a second plug connector 3114, which fits into the second plug interface 3221.

[0140] The electrical connection structure 31 further includes: a third flexible wire 3115 located at the rear side of the BMS slave control board 323 , and a third plug connector 3116 is provided at the end of the third flexible wire 3115 , which is fitted into the third plug port 3231 .

[0141] With this arrangement, during disassembly or assembly, the second and third plug connectors 3114, 3116 can be directly removed from the side access opening 101. By removing the second flexible wire 3113, the structure of the BMS main control board 322 can be inspected or disassembled. By removing the third flexible wire 3115, the structure of the BMS slave control board 323 can be inspected or disassembled.

[0142] When the assembly is completed, the second plug connector 3114 and the third plug connector 3116 are directly inserted from the rear side, which makes the assembly very convenient and reduces interference from messy wires.

[0143] As shown in Figures 6 and 8, in some embodiments, the electrical connection structure 31 includes a first wiring harness 311. The first wiring harness 311 is arranged around the electrical control structure 31 and is electrically connected to the battery pack 2. The first wiring harness 311 is provided with plug connectors that respectively connect to the BMS main control board 302, the BMS slave control board 303, and the first BDU module 321. The plug connectors are located on the side of the electrical control structure 31 facing the side access opening 101. The arrangement of the first wiring harness 311 around the electrical control structure 31 allows the plug connectors on the first wiring harness 311 to be reoriented toward the side access opening 101. This makes it easier to remove the first wiring harness 311 through the side access opening 101, further improving maintenance convenience.

[0144] Specifically, the first flexible wire 3111 , the second flexible wire 3113 , and the third flexible wire 3115 are all led out from the first wire harness 311 .

[0145] Specifically, the first wiring harness 311 is provided with a plurality of harness buckles spaced along the direction in which the first wiring harness 311 extends, and the harness buckles are disposed toward the side access opening 101. The plurality of harness buckles secure the first wiring harness 311, reducing the possibility of the first wiring harness 311 swinging and the possibility of the connectors on the first wiring harness 311 not being securely connected.

[0146] In some embodiments, as shown in Figures 1 and 3, the battery pack 100 further includes a side access cover 64, which can cover the side access opening 101 and is openably connected to the rear side wall 12. The side access cover 64 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 opening 101.

[0147] Specifically, as shown in Figure 15 , rear sidewall 12 has a plurality of first fixing holes 111 spaced apart along the circumference of side access opening 101. A side access cover 64 can be placed over side access opening 101. The cover includes a plurality of through-holes corresponding to the positions of the first fixing holes 111. Fasteners connect the first fixing holes 111 and the through-holes to enhance connection stability.

[0148] Alternatively, the side inspection cover 64 is connected to the rear side wall 12, one side of the side inspection cover 64 can be flipped relative to the rear side wall 12, and the other side of the side inspection cover 64 is provided with a through hole corresponding to the fixing hole of the rear side wall 12, and is connected by fasteners.

[0149] Specifically, the side access opening 101 has a dimension of 720 mm in the second direction D2 and a height of 70 mm. The height of the electrical control structure 32 is smaller than that of the side access opening 101, allowing the BMS main control board 322, BMS slave control board 323, and first BDU module 321 in the electrical control structure 32 to pass through the side access opening 101.

[0150] Specifically, when it is necessary to replace one of the BMS main control board 322, the BMS slave control board 323 and the first BDU module 321, 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-in connectors are removed and the faulty electrical components are passed through the side inspection port 101.

[0151] In some embodiments, as shown in Figures 7 and 8, the electrical connection structure 31 includes a second wiring harness 312, a third wiring harness 313, and a fourth wiring harness 314. The second wiring harness 312 is arranged along the length of the second electrical portion 33, and the second wiring harness 312 is detachably connected to at least one end of the second electrical portion 33, thereby electrically connecting the electrical connection structure 31 to the second electrical portion 33.

[0152] The third wiring harness 313 is connected between the first wiring harness 311 and the second wiring harness 312, thereby enabling communication between the electronic control structure 31 and the second electrical component 33. The fourth wiring harness 314 is connected to the third wiring harness 313. The end of the fourth wiring harness 314 is provided with a low-voltage electrical terminal 316. Through the low-voltage electrical terminal 316 of the fourth wiring harness 314, the battery pack 100 can transmit signals to devices outside the battery pack 100.

[0153] In some embodiments, as shown in Figures 13 and 6, the battery pack 100 also includes a partition assembly 5 disposed in the shell 1, and the partition assembly 5 includes: at least three beams 51, the beams 51 extend in the left and right directions, and at least three beams 51 are spaced apart in the front and back directions.

[0154] The battery pack 2 is located between the frontmost crossbeam 51 and the rearmost crossbeam 51. The frontmost crossbeam 51 and the front sidewall 11 define a front cavity 54, in which the second electrical component 33 is located. The rearmost crossbeam 51 and the rear sidewall 12 define a rear cavity 55, in which the electronic control structure 32 is located.

[0155] The provision of at least three crossbeams 51 divides the interior of the battery pack 100 housing 1 into zones, not only improving the structural strength of the battery pack 100 but also providing mounting locations for the internal structure. Furthermore, the provision of at least three crossbeams 51 can also restrict the direction in which the internal fluid is discharged.

[0156] Specifically, the partition assembly 5 further includes at least two longitudinal beams 52 extending in the front-to-back direction, with a longitudinal beam 52 connecting between each pair of adjacent transverse beams 51. A receiving chamber 56 is defined between the two adjacent transverse beams 51, the longitudinal beam 52, and the sidewalls of the housing 1. The battery pack 2 includes multiple battery groups 20, with each receiving chamber 56 housing a battery group 20.

[0157] In FIG. 3 and FIG. 4 , the battery pack 2 includes four battery groups 20 , and each battery group 20 is located in a receiving compartment 56 .

[0158] In some specific embodiments, as shown in Figures 14 and 6, each crossbar 51 includes a lower crossbar 511 and an upper crossbar 512. The lower crossbar 511 extends in the left-right direction, with its ends respectively connected to the left side wall 13 and the right side wall 14 of the housing 1. The upper crossbar 512 extends in the left-right direction and is fixedly connected above the lower crossbar 511. Each lower crossbar 511 is connected to at least two spaced-apart upper crossbars 512.

[0159] On the same crossbeam 51, a first notch 5131 is defined between the upper crossbar 512 on the left and the left side wall 13 of the shell 1, a second notch 5132 is defined between the upper crossbar 512 on the right and the right side wall 14 of the shell 1, a third notch 5133 is defined between two adjacent upper crossbars 512, and a third notch 5133 is provided above the junction of two adjacent longitudinal beams 52.

[0160] This overlapping arrangement of horizontal and vertical beams facilitates installation and provides support for the third wiring harness 313 as it passes through the battery pack 2. This not only improves the orderliness of wiring, but also eliminates the need for the third wiring harness 313 to be inserted into the receiving chamber 56 , reducing the chance of the pressure relief member 202 spraying electrolyte toward the third wiring harness 313 and thereby minimizing the risk of the third wiring harness 313 shorting or breaking.

[0161] Specifically, the third wire harness 313 is fastened to the longitudinal beam 52 through a wire harness buckle, thereby reducing shaking of the third wire harness 313 during vibration and reducing the probability of loosening caused by shaking.

[0162] In some specific embodiments, as shown in Figures 6 and 8 , a first wiring harness 311 is located within the rear cavity 55 and surrounds the electronic control structure 32. The first wiring harness 311 is electrically connected to the battery pack 2 and is removably electrically connected to the electronic control structure 32. A second wiring harness 312 is located within the front cavity 54 and is disposed in the left-right direction behind the second electrical section 33. The second wiring harness 312 is removably electrically connected to the second electrical section 33. This ensures that the first and second wiring harnesses 311, 312 are each restrained, reducing vibration and the risk of loose connections caused by vibration.

[0163] Furthermore, as shown in Figure 6, battery pack 100 also includes at least one seat-mounting nut 53 for attaching to an external seat. This nut 53 is fixedly connected to at least one crossbeam 51, which has at least two seat-mounting nuts 53 spaced apart along the left-right direction. When battery pack 100 is used in vehicle 1000, the seats within passenger space 220 can be fastened to the seat-mounting nut 53 via fasteners. This eliminates the need for a separate seat-mounting crossbeam within passenger space 220, improving the compactness of the structure and reducing the number of parts.

[0164] Alternatively, as shown in Figures 6 and 1, the height of the crossbeam 51 is smaller than that of the housing 1. Seat mounting nuts 53 are welded to the top of the crossbeam 51, and seat securing fasteners 66 are provided on the top plate 16 of the housing 1, facing each seat mounting nut 53. This allows the seat to be connected to both the seat securing fasteners 66 and the seat mounting nuts 53 via fasteners, extending the vertical length of the seat. Furthermore, when the seat is subjected to force, the force is transferred to the entire battery pack 100, dissipating the impact force.

[0165] In some specific embodiments, as shown in FIG2 , the battery cells 201 in the battery group 20 are arranged in a left-right direction, and pressure relief members 202 are provided on the left and / or right ends of the battery cells 201. In the example of FIG2 , each battery cell 201 in each battery group 20 is provided with a pressure relief member 202 to enhance safety. The number of pressure relief members 202 on each battery cell 201 can be one or more, and this is not a limitation.

[0166] Specifically, the battery cells 201 are sheet-shaped and extend along the second direction D2. Multiple battery cells 201 are stacked along the first direction D1 to form a battery group 20, thereby increasing the arrangement density of the battery group 20 and improving the energy density of the battery pack 100.

[0167] The battery group 20 forms a flow channel 561 between its left and right ends and the inner wall of the sub-cavity 56. This eliminates the need for separate channels. The channels between the ends of the battery group 20 and the inner wall of the sub-cavity 56 are used to discharge high-pressure gas discharged from the pressure relief member 202, thereby improving internal space utilization. This flow channel 561 also serves as a buffer channel for the battery group 20.

[0168] Optionally, the width x1 of the circulation channel 561 is 5-50 mm, thereby effectively ensuring the flowability of the circulation channel 561 without being too wide and occupying too much volume. Optionally, the width x1 of the circulation channel 561 is 35 mm. Here, the width x1 of the circulation channel 561 refers to its dimension in the second direction D2.

[0169] Optionally, as shown in FIG5 , an exhaust port 102 is provided on the rear side wall 12 of the housing 1, so that the discharged high-pressure gas can be discharged from the exhaust port 102. Further optionally, as shown in FIG5 , an air pressure balancing valve 65 is provided at the exhaust port 102, so that when high-pressure gas is discharged from the interior, the air pressure balancing valve 65 is opened to exhaust gas, and remains closed when the air pressure is normal.

[0170] In some embodiments, as shown in Figure 6, high-voltage and low-voltage terminals 315 and 316 are mounted on the front sidewall 11 of the housing 1, spaced apart from the second electrical section 33 in the left-right direction. An exhaust port 102 is provided on the rear sidewall 12 of the housing 1. This arrangement allows the battery pack 100's external electrical connection and communication points, along with the side access port 101, to be located on the front and rear sides of the battery pack 100, without interfering with each other. When installed on a vehicle 1000, the electrical connection and communication points have a low failure rate, so their placement on the front side, protected within the vehicle body 200, further reduces their failure rate.

[0171] The second electrical section 33 is located adjacent to and along the front sidewall 11. The high-voltage terminals 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 terminals 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 section 33, the low-voltage terminals 316, and the high-voltage terminals 315. Installed near the front sidewall 11, this reduces the layout of the electrical connection structure 31 and the cost of electrical connections.

[0172] In some embodiments, as shown in FIG3 , the bottom plate of the housing 1 is a detachable bottom guard plate 15 , so that the second electrical part 33 can be detached when the bottom guard plate 15 is removed.

[0173] The second electrical component 33 can be installed or removed from the housing 1. The bottom plate of the housing 1 is a removable bottom guard plate 15, so that the second electrical component 33 can be removed and installed when the bottom guard plate 15 is removed. When the second electrical component 33 needs to be repaired, the bottom guard plate 15 is removed from the battery pack 100 and the second electrical component 33 is removed.

[0174] Specifically, as shown in Figures 22 and 23, the battery pack 100 also includes: a liquid cooling plate 6, which is located below the battery group 2 and the electrical module 3, and a bottom guard plate 15 is detachably connected to the bottom of the liquid cooling plate 6. The liquid cooling plate 6 is provided with a bottom inspection port 61 corresponding to the second electrical part 33, and the bottom guard plate 15 covers the bottom inspection port 61.

[0175] The liquid cooling plate 6 is provided with a bottom access opening 61, which is located at the bottom of the battery pack 100 and corresponds to the second electrical section 33. The bottom guard plate 15 covers the bottom access opening 61. The liquid cooling plate 6 is used to cool the battery pack 2 to a safe temperature range.

[0176] A bottom inspection port 61 is provided on the liquid cooling plate 6 , which does not affect the disassembly of the second electrical part 33 , and the liquid cooling plate 6 can be connected to the bottom of the frame 10 at all four edges, further improving the overall structural strength.

[0177] When applied to the vehicle 1000, the bottom guard plate 15 acts as the bottom plate of the electric vehicle 1000 and can bear the weight inside the vehicle 1000; on the other hand, the bottom guard plate 15 can protect the internal structure of the battery pack 100 and reduce damage.

[0178] Specifically, as shown in Figure 6 , the liquid cooling plate 6 is provided with a liquid flow channel for circulating cooling liquid. A liquid cooling pipe 601 is provided on the liquid cooling plate 6 for flowing liquid in and out. A liquid cooling connector 602 is provided at the end of the liquid cooling pipe 601 for connecting to an external water tank. The liquid cooling connector 602 can be mounted on the frame 10, for example, on the front sidewall 11.

[0179] Furthermore, as shown in FIG. 22 , a sealing ring 62 needs to be provided on the periphery of the bottom inspection opening 61 to improve the sealing performance of the bottom inspection opening 61 during use.

[0180] The position of the bottom access opening 61 is relatively flexible. For example, in Figure 22, the liquid cooling plate 6 is provided with a sealing ring 62 arranged around the bottom access opening 61. As shown in Figure 29, the bottom guard plate 15 is provided with a sealing ring 62 arranged around the bottom access opening 61.

[0181] In another embodiment, as shown in FIG22 , the battery pack 100 further includes a bottom access cover 63 covering the bottom access opening 61. The bottom access cover 63 is detachably connected to the liquid cooling plate 6 and is located above the bottom guard plate 15. The bottom access cover 63 protects the internal structure of the battery pack 100 and prevents dust, moisture, etc. from entering the battery pack 100 through the bottom access opening 61.

[0182] Optionally, a sealing ring 62 is provided on the bottom inspection cover 63 and is arranged around the bottom inspection opening 61 to further improve the sealing protection of the bottom inspection opening 61 .

[0183] Furthermore, as shown in FIG29 , the battery pack 100 includes fastening bolts 611 connecting the bottom guard plate 15 and the liquid cooling plate 6. Multiple fastening bolts 611 are distributed around the bottom access opening 61. Tightening the bolts 611 secures the bottom guard plate 15 and the liquid cooling plate 6 at the bottom access opening 61, improving the connection reliability and sealing at the bottom access opening 61.

[0184] In some optional embodiments, as shown in FIG29 , the upper surface of the bottom guard plate 15 is provided with an upwardly protruding thickened layer 151. The projection of the thickened layer 151 on the liquid cooling plate 6 completely covers the bottom access opening 61. Thus, after the bottom guard plate 15 is connected and fixed to the upper frame 10, the thickened layer 151 is pressed upward, thereby tightening the bottom access opening 61 and improving the sealing performance.

[0185] In some optional embodiments, as shown in FIG28 , a buffer layer 18 may be provided on the upper surface of the bottom guard plate 15 to improve the buffer protection of the internal battery pack 2 and the electrical module 3 .

[0186] In some embodiments, as shown in Figures 13 and 6 , a fixing plate 67 is provided within the housing 1 and positioned above the second electrical section 33. The second electrical section 33 is removably connected to the fixing plate 67 via a fourth bolt 3294. The head of the fourth bolt 3294 is located at the bottom, meaning that the fourth bolt 3294 is installed away from the fixing plate 67 and toward the bottom access opening 61. The projection of the fourth bolt 3294 on the liquid cooling plate 6 is positioned within the bottom access opening 61, allowing for removal or installation of the fourth bolt 3294 through the bottom access opening 61, improving ease of removal or installation.

[0187] As shown in Figures 23 and 24, in some embodiments, the second electrical section 33 includes a second electrical housing 332 for accommodating electrical components. Specifically, the second electrical section 33 also includes a first extension plate 3351, which is connected to at least one side of the second electrical housing 332. The first extension plate 3351 is provided with a mating groove that extends through the side away from the second electrical housing 332. The battery pack 100 also includes a shock-absorbing column 333, which is arranged vertically.

[0188] As shown in Figure 26, the shock-absorbing column 333 includes two thick column sections 3331 and a thin column section 3332 located between the two thick column sections 3331. As shown in Figures 24 and 25, the thin column section 3332 fits within the mating groove, and the two thick column sections 3331 are clamped on the upper and lower sides of the first extension plate 3351. The shock-absorbing column 333 is provided with a center hole 3333, through which the fourth bolt 3294 passes and connects to the fixing plate 67. The provision of the shock-absorbing column 333 not only allows for connection to the fixing plate 67, improving connection reliability, but also absorbs vibrations from the second electrical section 33, thereby protecting the electrical components housed within the second electrical housing 332.

[0189] To facilitate disassembly, the electrical connection structure 31 is electrically connected to the second electrical part 33 via a flexible wiring harness. For example, the second electrical part 33 has a first signal transmission interface 339 as a connector for communication, and the second wiring harness 312 of the electrical connection structure 31 is connected to a second signal transmission interface 3121, and the two are plug-connected.

[0190] As shown in Figure 23, the first signal transmission interface 339 is located at the bottom of the second electrical housing 332. This allows for easy inspection of the interface status when the bottom inspection hatch 61 is opened. Specifically, the second signal transmission interface 36 plugs into the first signal transmission interface 339 from the side. This facilitates manual insertion and removal of the second signal transmission interface 36 while also utilizing the weight of the wires to reduce vibration.

[0191] Specifically, the first signal transmission interface 339 is connected to the interior of the second electrical shell 332 via a plurality of fourth flexible wires 331 , so that the second electrical portion 33 can be connected to the electrical connection structure 32 via the first transmission interface 319 .

[0192] In some specific embodiments, as shown in Figure 25 , the second electrical housing 332 of the second electrical section 33 is removably connected to the housing 1. The second electrical section 33 includes a main relay 337, a terminal strip 338, and a first transmission interface 319. The main relay 337 is located within the electrical housing 1. One end of the terminal strip 338 is connected to the main relay 337, while the other end of the terminal strip 338 is located outside the second electrical housing 332. The terminal strip 338 is used to connect to high voltage power, which the main relay 337 can control.

[0193] Specifically, the electrical connection structure 32 includes a copper busbar 317 and a second transmission interface 37. One end of the copper busbar 317 is connected to the other end of the power strip 338 via a fifth bolt 3295. The second signal transmission interface 36 is plugged into the first signal transmission interface 339, thereby achieving electrical connection between the second electrical component 33 and the electrical connection structure 32.

[0194] For example, the copper busbar 317 is long and flexible, allowing for flexibility. The connection between the copper busbar 317 and the terminal strip 338 is covered with an insulating cover, which is attached to the second electrical housing 332. To remove the second electrical section 33, first power off the second electrical section 33, remove the insulating cover, and release the securing structure between the copper busbar 317 and the terminal strip 338. The fifth bolt 3295 can then be loosened. The fourth bolt 3294 can be exposed by unplugging the second transmission interface 37, allowing it to be loosened.

[0195] As shown in Figure 27, in some embodiments, the second electrical part 33 also includes a second extension plate 3352 connected to the second electrical shell 332, and mating hooks 33521 are provided on opposite sides of the second extension plate 3352. There are two first signal transmission interfaces 339, and the two first signal transmission interfaces 36 are located on opposite sides of the second extension plate 1352. Each first signal transmission interface 339 is provided with a mating groove that cooperates with the mating hook 33521, so that the first signal transmission interface 339 can be fixed on the second electrical shell 332. Through the snap-on connection, the connection cost can be reduced and the connection reliability can be improved.

[0196] As shown in FIG. 25 , in some embodiments, two main relays 337 are spaced apart. A downwardly projecting lower portion 336 is formed on the bottom of the second electrical housing 332. The two lower portions 336 cover the two main relays 337, respectively. A second through-hole 3361 is defined on the bottom of the second electrical housing 332, adjacent to the two lower portions 336. Part of the fourth flexible conductor 331 extends into the second electrical housing 332 through one second through-hole 3361, while part extends into the second electrical housing 332 through another second through-hole 3361. This allows the second electrical housing 332 to be used to define the placement of the fourth flexible conductor 331, reducing the likelihood of interference with other components and mitigating adverse effects on the signal.

[0197] 25 and 27 , a side portion of at least one lower protrusion 336 is provided with a wire fastener 3362 for limiting the fourth flexible wire 331. This can limit the movement of the wire fastener 3362 and reduce the swing of the wire fastener 3362.

[0198] In some embodiments, the frame 10 is composed of multiple frame side beams 103 connected in sequence along the length direction to ultimately form an annular frame, which is referred to as the frame 10. Specifically, the front side wall 11 is composed of at least one frame side beam 103, the rear side wall 12 is composed of at least one frame side beam 103, the left side wall 13 is composed of at least one frame side beam 103, and the right side wall 14 is composed of at least one frame side beam 103.

[0199] Each frame side beam 103 includes at least two frame portions 1031 distributed along the height direction, with each frame portion 1031 forming a closed side beam cavity. Each frame side beam 103 may include two frame portions 1031 stacked in sequence along the height direction. In some embodiments, adjacent frame portions 1031 are connected by connecting ribs.

[0200] Among them, each frame side beam 103 is formed by rolling steel plates in one piece, or the frame side beam 103 is an extruded aluminum profile formed in one piece. As a result, all the frame parts 1031 of each frame side beam 103, or all the frame parts 1031 and all the connecting ribs are continuous, and each side of the frame part 1031 is rolled or extruded, and is not formed by stretching ordinary profiles. In this way, on the one hand, welding between the sides of the same frame part 1031 can be reduced, and welding between two adjacent frame parts can be reduced, thereby reducing the processing steps. In addition, the two adjacent frame parts not only have a spliced ​​and stacked positional relationship, but also have connected side pulling, which makes the integrity stronger and the overall structural strength can be greatly improved.

[0201] Furthermore, the mounting beam 17 is formed by integrally rolling a steel plate, or the mounting beam 17 is an integrally formed extruded aluminum profile.

[0202] As shown in Figure 31 , a vehicle 1000 according to an embodiment of the present application includes a vehicle body 200 and a battery pack 100 of the aforementioned embodiment. The structure of the battery pack 100 is not further described. As shown in Figure 32 , a passenger space 220 is formed within the vehicle body 200, and the battery pack 100 is mounted on the bottom of the vehicle body 200.

[0203] By adopting the above-mentioned 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 the cost and weight can be reduced.

[0204] Specifically, the bottom of the vehicle body 200 forms an installation opening 230, within which the battery pack 100 is positioned. The bottom of the vehicle body 200 also forms an upwardly concave upper cavity 240, with the rear end of the battery pack 100 facing the upper cavity 240. This allows for maintenance to be performed from below through the upper cavity 240, without disassembling the vehicle and minimizing damage to the vehicle.

[0205] Other structures and operations of the vehicle 1000 according to the embodiment of the present application are known to ordinary technicians in this field and will not be described in detail here.

[0206] Throughout this specification, references to terms such as "embodiment" and "example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations 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 any one or more embodiments or examples.

[0207] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery pack (100), wherein, Including: A housing (1) provided with a side maintenance opening (101) thereon. An electric control structure (32) disposed inside the housing (1) and opposite to the side maintenance opening (101). The electric control structure (32) includes a first BDU module (321). The first BDU module (321) includes: a first electric housing (3211), a fuse (3212), and a current sensor (3213). The first electric housing (3211) is provided with a first opening (3211a) facing the side maintenance opening (101). The fuse (3212) and the current sensor (3213) are detachably disposed inside the first electric housing (3211), and the current sensor (3213) is connected in series with the fuse (3212).

2. The battery pack (100) according to claim 1, wherein, A first positioning cavity (3211e) and a second positioning cavity (3211h) that are open towards the side maintenance opening (101) are provided inside the first electric housing (3211). The fuse (3212) is located inside the first positioning cavity (3211e), and the current sensor (3213) is located inside the second positioning cavity (3211h). A first positioning boss (3211c) is formed on at least one side of the first positioning cavity (3211e) inside the first electric housing (3211), and the end of the fuse (3212) is detachably connected to the first positioning boss (3211c). A second positioning boss (3211f) is formed on at least one side of the second positioning cavity (3211h) inside the first electric housing (3211), and the end of the current sensor (3213) is detachably connected to the second positioning boss (3211f).

3. The battery pack (100) according to claim 2, wherein, Threaded holes are provided on the surfaces of the first positioning boss (3211c) and the second positioning boss (3211f) facing the side maintenance opening (101). The fuse (3212) is connected to the first positioning boss (3211c) by bolts, and the current sensor (3213) is connected to the second positioning boss (3211f) by bolts.

4. The battery pack (100) according to claim 2 or 3, wherein, The first positioning boss (3211c) and the second positioning boss (3211f) are staggered in height and have different distances from the side maintenance opening (101).

5. The battery pack (100) according to any one of claims 2-4, wherein, The first BDU module (321) further includes: a first conductive sheet (3214) located inside the first positioning cavity (3211e) and on the side of the fuse (3212) away from the side maintenance opening (101). Part of the side edge of the first conductive sheet (3214) extends horizontally and then bends to be connected to one of the first positioning bosses (3211c) to be electrically connected to the fuse (3212). Part of the upper edge of the first conductive sheet (3214) extends upward and then bends to be connected to one of the second positioning bosses (3211f) to be electrically connected to the current sensor (3213).

6. The battery pack (100) according to any one of claims 2-5, wherein, The first electrical housing (3211) is provided with a second opening (3211b) at the top. The first BDU module (321) further includes: a top cover (3216) and two second conductive sheets (3215). The two second conductive sheets (3215) are arranged at the top of the first electrical housing (3211) at a left-right interval, and each second conductive sheet (3215) extends in the front-rear direction.

7. The battery pack (100) according to claim 6, wherein, The battery pack (100) further includes a battery pack (2). The rear end of one of the second conductive sheets (3215) is bent downward and placed on a first positioning boss (3211c) and is electrically connected to the fuse (3212). The rear end of the other second conductive sheet (3215) is bent downward and placed on a second positioning boss (3211f) and is electrically connected to the current sensor (3213). The front ends of the two second conductive sheets (3215) are respectively connected to the battery pack (2) through copper bars (317); The top cover (3216) is detachably connected to the top of the first electrical housing (3211) and covers the two second conductive sheets (3215).

8. The battery pack (100) according to claim 6 or 7, wherein, The current sensor (3213) has a first insertion port (32131) at the rear side. The top cover (3216) is provided with a first through hole (3216a) facing the first insertion port (32131).

9. The battery pack (100) according to claim 8, wherein, The top surface of the top cover (3216) is provided with a limiting groove (3216b) extending in the front-rear direction, and the front end of the limiting groove (3216b) is arranged facing the first through hole (3216a); The top cover (3216) is further provided with a limiting protrusion (3216c) on at least one side of the limiting groove (3216b).

10. The battery pack (100) according to any one of claims 1-9, wherein, The electric control structure (32) further includes a BMS main control board (322) and a BMS slave control board (323). The BMS main control board (322) and the BMS slave control board (323) are located on both sides of the first BDU module (321) and are both arranged facing the side maintenance opening (101).

11. A vehicle (1000), wherein, It also includes the battery pack (100) according to any one of claims 1-10.

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