CN118137049A

CN118137049A - Battery pack and vehicle with same

Info

Publication number: CN118137049A
Application number: CN202311869056.6A
Authority: CN
Inventors: 陈勃言; 赵群; 周维; 任向飞; 郭梦梦; 张德旺
Original assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Priority date: 2023-12-29
Filing date: 2023-12-29
Publication date: 2024-06-04

Abstract

The invention discloses a battery pack and a vehicle with the battery pack. The battery pack includes: the frame is used for enclosing the accommodating cavity; the separation assembly is arranged in the frame to separate the accommodating cavity into a plurality of accommodating sub-cavities; the liquid cooling plate is positioned at the bottom of the frame, the liquid cooling plate is provided with a bottom access hole opposite to one accommodating sub-cavity, and the liquid cooling plate is fixedly connected with the frame and a separation assembly at least adjacent to the bottom access hole; the bottom guard board is detachably connected below the liquid cooling plate and used for opening and closing the bottom access hole. According to the battery pack disclosed by the embodiment of the invention, the liquid cooling plate is fixedly connected with the frame and the separation assembly adjacent to the bottom access opening, the environment where the electric module is located is relatively stable, the electric module is not easy to loosen in long-term operation, and the stability and reliability of the operation environment are improved.

Description

Battery pack and vehicle with same

Technical Field

The invention relates to the technical field of battery packs, in particular to a liquid cooling plate of a battery pack, the battery pack with the liquid cooling plate and a vehicle.

Background

With the iterative update of new energy technology, the integrated technology of the battery car body is continuously developed. The battery pack is directly integrated on the chassis of the vehicle, so that higher integration can be realized. The battery pack includes a frame, an upper cover, a battery pack, an electrical connection member, and the like, and the electrical connection member is mounted in the case.

The bottom of the battery pack is provided with a liquid cooling plate, and the liquid cooling plate of the battery pack is not detachable, so that the battery pack can be detached from the side surface or the top of the battery pack only when an electric module in the battery pack needs to be detached and overhauled. In some schemes, a bottom access hole is formed in the upper opening of the liquid cooling plate, and the structure is easy to loosen during the overhaul, so that the electric module is not beneficial to keeping a stable environment for long-term operation.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the battery pack, and the supporting and protecting effects on the electric module are improved through reasonably arranging and fixing the connecting positions, so that the running stability and reliability are improved.

The invention also aims to provide a vehicle with the battery pack.

According to an embodiment of the present invention, a battery pack includes: the frame is used for enclosing the accommodating cavity; the separation component is arranged in the frame to separate the accommodating cavity into a plurality of accommodating sub-cavities; the liquid cooling plate is positioned at the bottom of the frame, the liquid cooling plate is provided with a bottom access hole opposite to one accommodating sub-cavity, and the liquid cooling plate is fixedly connected with the frame and the separation assembly at least adjacent to the bottom access hole; the bottom guard board is detachably connected below the liquid cooling plate and used for opening and closing the bottom access hole.

According to the battery pack disclosed by the embodiment of the invention, the separation assembly is arranged, so that the accommodating cavity in the frame can be partitioned, and the electric module and the battery pack are separated. Through setting up the bottom access hole on the liquid cooling board, then the at least partial electric module of battery package can install in bottom access hole top, opens bottom access hole just can operate when needs maintenance, improves battery package maintenance operation convenience. Through with inlet and liquid outlet adjacent bottom access hole setting, inlet and liquid outlet top need be connected the takeover, and bottom access hole top needs to install at least partial electric module, and this space can compact overall arrangement like this, does not need to occupy other areas, and the group battery can be arranged to the area that vacates on the liquid cooling board, has improved the space utilization of liquid cooling board top area. The liquid cooling pipe that connects here can be adjacent electric module setting, borrow this liquid cooling pipe can improve the radiating effect to electric module. Through liquid cooling board and frame, the subassembly fixed connection that separates adjacent bottom access hole, this place electric module place environment is more firm, is difficult for loose when long-term operation, improves operational environment's stable reliability.

According to an embodiment of the present invention, a vehicle includes: the battery pack described in the above embodiment.

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.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which: FIG. 1 is an overall schematic of a battery pack of some embodiments; FIG. 2 is a schematic diagram of the positional relationship between an electrical module and a battery pack at one perspective of some embodiments; FIG. 3 is a schematic diagram of the positional relationship between an electrical module and a battery pack in another perspective of some embodiments; fig. 4 is an exploded view of a battery pack of some embodiments at one perspective; FIG. 5 is a block diagram of a battery pack of some embodiments with parts hidden from view; FIG. 6 is a block diagram of a battery pack of some embodiments with parts hidden from view at another view; FIG. 7 is a schematic structural view of a wiring harness of an electrical module of some embodiments; FIG. 8 is a schematic top view of an electrical module of some embodiments; FIG. 9 is a schematic front view of a portion of the structure of an electrical module of some embodiments; FIG. 10 is a schematic view of the structure of some embodiments with the battery pack side access cover open;

FIG. 11 is a partial schematic view of a battery pack of some embodiments with a wiring harness hidden and a side access cover open; FIG. 12 is a schematic top partial structural view of a housing and support frame of some embodiments; FIG. 13 is a schematic top partial structural view of the housing and support bracket, mounting plate of some embodiments; FIG. 14 is a partial structural schematic view of another view of the housing and support bracket, mounting plate of some embodiments; FIG. 15 is a schematic rear view of the housing and support frame of some embodiments; fig. 16 is an assembly structure schematic diagram of a BMS main control board of some embodiments at one view angle; fig. 17 is an assembly structure schematic view of the BMS main control board of some embodiments at another view angle; fig. 18 is an assembly structure schematic view of a BMS slave board of some embodiments at one view angle; fig. 19 is a schematic view of an assembled structure of the BMS slave board of some embodiments at another view angle; FIG. 20 is a schematic diagram of a first BDU module in one view of some embodiments; FIG. 21 is an exploded view of a first BDU module of some embodiments at another perspective; fig. 22 is an exploded view of a further view of a battery pack of some embodiments; FIG. 23 is an enlarged view of a portion of FIG. 22; FIG. 24 is a schematic structural view of a second electrical portion of some embodiments; FIG. 25 is an exploded view of a second electrical portion of some embodiments; FIG. 26 is a schematic structural view of a shock strut of some embodiments; FIG. 27 is a schematic view of a partial structure of a second electrical enclosure of some embodiments; FIG. 28 is a partial view of some embodiments of a seat attachment fastener assembled to an upper cover; FIG. 29 is a partial cross-sectional view of some embodiments of a seat attachment fastener assembled to an upper cover; FIG. 30 is a cross-sectional view of a housing of a battery pack of some embodiments; FIG. 31 is a cross-sectional view of a frame side rail and mounting rail on a battery pack of other embodiments; FIG. 32 is a partial view of a housing of a battery pack of still other embodiments; FIG. 33 is an exploded view of the housing of the battery pack of still other embodiments; FIG. 34 is a perspective view of a liquid cooling plate of some embodiments;

FIG. 35 is a bottom view of a liquid cooling plate of some embodiments; FIG. 36 is a schematic view of the construction of a bottom shield and its upper cushioning layer according to some embodiments of the present invention; FIG. 37 is a schematic view of a partial construction of a bottom shield according to further embodiments of the invention; FIG. 38 is an overall schematic of a vehicle of some embodiments; fig. 39 is a positional relationship diagram of a battery pack in a vehicle body of some embodiments.

Reference numerals: vehicle 1000, battery pack 100, case 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 cover 15, bottom main plate 150, thickened bead 151, bottom strip 153, escape notch 1531, first bottom attachment hole 156, second bottom attachment hole 157, top cover 16, cover body 161, hard layer 161a, buffer layer 161b, mounting beam 17, first mounting beam 171, second mounting beam 172, mounting portion 17-10, mounting cavity 17-40, shock absorber 18, side access opening 101, The external interface 102, the frame side frame 10-1, the frame body 10-10, the connection rib 10-6, the frame body chamber 10-40, the first fixing hole 111, the battery pack 2, the battery pack 20, the battery cell 201, the pressure release member 202, the first bus bar 203, the second bus bar 204, the electric module 3, the electric connection structure 31, the first wire harness 311, the first flexible wire 3111, the first plug connector 3112, the second flexible wire 3113, the second plug connector 3114, the third flexible wire 3115, the third plug connector 3116, the second wire harness 312, the second signal transmission interface 3121, the second wire harness, The third wire harness 313, the fourth wire harness 314, the high-voltage electrical terminal 315, the low-voltage electrical terminal 316, the copper bar 317, the first electrical part 32, the first BDU module 321, the first electrical housing 3211, the first opening 3211a, the second opening 3211b, the first positioning boss 3211c, the second threaded hole 3211d, the first positioning cavity 3211e, the second positioning boss 3211f, the third threaded hole 3211g, the second positioning cavity 3211h, the fuse 3212, the current sensor 3213, the first socket 32131, the first conductive tab 3214, the second conductive tab 3215, Top cover 3216, first through hole 3216a, limit groove 3216b, limit protrusion 3216c, first fastening part 3216d, side cover 3217, second fastening part 3217a, arc surface plate 3217b, BMS main control plate 322, second insertion opening 3221, BMS slave control plate 323, third insertion opening 3231, mounting plate 324, flange 3241, mounting plate 3242, first bolt 3291, second bolt 3292, third bolt 3293, fourth bolt 3294, fifth bolt 3295, second electric part 33, fourth flexible wire 331, and third electric part, The second electric casing 332, the shock-absorbing column 333, the thick column section 3331, the thin column section 3332, the center hole 3333, the first exterior plate 3351, the second exterior plate 3352, the mating hook 33521, the lower protrusion 336, the second through hole 3361, the wire fastener 3362, the main relay 337, the power receiving strip 338, the first signal transmission interface 339, the first fastening device 361, the second fastening device 362, the third fastening device 363, the fourth fastening device 364, the fifth fastening device 365, the support frame 4, the support rail 40, the first rail 401, the second rail 402, the third rail 403, Fourth longitudinal bar 404, support cross bar 41, first threaded hole 411, escape groove 412, partition assembly 5, partition beam 50, partition 50-10, partition cavity 50-40, partition cross beam 51, lower cross beam 511, upper cross beam 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, access plate 54, accommodation cavity V1, accommodation cavity V10, front cavity V11, rear cavity V12, circulation channel V101, width x1 of circulation channel, liquid cooling plate 6, liquid flow channel 6-01, and third notch 5133, The liquid inlet 6-02, the liquid outlet 6-03, the joint edge 6-04, the upper liquid plate 6-05, the lower liquid plate 6-06, the welding through hole 6-061, the first liquid cooling connecting hole 6-07, the second liquid cooling connecting hole 6-08, the first liquid cooling avoiding hole 6-09, the second liquid cooling avoiding hole 6-10, the shunt sub-channel 6-11, the reflux sub-channel 6-12, the heat dissipation sub-channel 6-13, the first extension sub-channel 6-14, the second extension sub-channel 6-15, the avoidance arc edge 6-16, the liquid cooling pipe 601, the liquid cooling joint 602, the bottom access hole 61, the fastening bolt 611, the sealing ring 62, the bottom access cover 63, The side access cover 64, the air pressure balance valve 65, the seat fixing fastener 66, the seat fixing screw hole 661, the rotary table 662, the support boss 663, the fixing plate 67, the triangular reinforcing plate 68, the insulating cover 81, the vehicle body 200, the passenger space 220, the upper cavity 240, the seat 300.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; the mechanical connection and the electrical connection are realized; but may be directly connected or indirectly connected through an intermediate medium, or may be the communication between the two components. The specific meaning of the above terms in the present invention can be understood in a specific case by those of ordinary skill in the art. Furthermore, features defining "first", "second" may explicitly or implicitly include one or more such features. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

The battery pack 100 and the respective constituent structures of the battery pack 100 according to the embodiment of the present invention are described below with reference to the accompanying drawings.

It can be appreciated that the application field of the battery pack 100 is not limited, and the installation pose of the battery pack 100 may be different in different application scenarios. While references herein to "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "longitudinal", "transverse", "length", "width", "thickness", "height", etc., in embodiments that do not refer to a specific application scenario are merely for convenience in describing the present application and simplifying the description, rather, are intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present application. Specifically, as shown in fig. 1 and 3, the first direction D1 is a front-back direction, the second direction D2 is a left-right direction, the battery pack 100 is horizontally disposed at this time, the first direction D1 and the second direction D2 are both perpendicular to the height direction, and the height direction of the battery pack 100 is the up-down direction shown in fig. 1. With reference to this orientation, in the present application, the four side walls of the housing 1 are respectively referred to as a front side wall 11, a rear side wall 12, a left side wall 13, and a right side wall 14, that is, the front side wall 11 and the rear side wall 12 are two opposite side walls of the housing 1 along the first direction D1, the left side wall 13 and the right side wall 14 are two opposite side walls of the housing 1 along the second direction D2, and the top cover 16 and the bottom guard 15 of the housing 1 are two opposite side walls of the housing 1 along the height direction. If the battery pack 100 is vertically disposed in another application scenario, the first direction D1 is adaptively adjusted to the up-down 32 direction, and the height direction of the battery pack 100 is adaptively adjusted to the horizontal direction, at this time, the names of the side walls of the housing 1 are unchanged, but the actual positions of the side walls in the application scenario should be adaptively adjusted. Similar scenarios are not described in detail below.

As shown in fig. 1 to 6, a battery pack 100 according to an embodiment of the present invention includes: a housing 1, a battery pack 2 and an electrical module 3.

The case 1 of the battery pack 100 includes a frame 10, a top cover 16 and a bottom sheathing plate 15, the frame 10 enclosing a receiving chamber V1 of the case 1, the top cover 16 and the bottom sheathing plate 15 being coupled at the upper and lower ends of the frame 10 to close the receiving chamber V1.

In some embodiments, as shown in fig. 5, 6, 12 and 13, the battery pack 100 further includes a partition member 5 disposed in the housing 1, and the partition member 5 is disposed in the housing 1 to partition the accommodating cavity V1 into a plurality of accommodating sub-cavities V10, so that the battery pack 2 and the electric control structure can be separated in different accommodating sub-cavities V10.

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

The electrical module 3 includes an electrical connection structure 31 and an electrical control structure, the electrical control structure is used for controlling and managing energy of the battery pack 100, safe operation of the battery pack 100 is guaranteed, and the electrical connection structure 31 is a connection conductor between the electrical control structure and each part in the battery pack 100.

In some embodiments, the electrical control structure is integrally provided to occupy a position within the battery pack 100. In other embodiments, the electrical control structure includes a first electrical portion 32 and a second electrical portion 33, i.e., the electrical control structure is configured separately to occupy different positions within the battery pack 100, and the electrical connection structure 31 is configured to electrically connect the first electrical portion 32, the second electrical portion 33, and the battery pack 2.

The electrical module 3 is used for being connected with the external environment, charging/discharging and communicating with the outside. The electrical terminals further include high voltage electrical terminals 315, low voltage electrical terminals 316, the high voltage electrical terminals 315, the low voltage electrical terminals 316 being provided on the frame 10. The high-voltage electric terminal 315 serves as a charging terminal for supplying power to the outside of the battery pack 100, and the high-voltage electric terminal 315 may serve as a charging terminal when the battery pack 100 itself is charged. The low-voltage electric terminal 316 serves as an information terminal when the battery pack 100 communicates information with the outside.

It should be noted that the descriptions of "high voltage" and "low voltage" herein do not limit the specific voltage values thereof, but rather limit the relative values of the voltages thereof. The high-voltage value is typically the power supply voltage of the battery pack 100 as the power source, and the low-voltage value is typically the signal transmission voltage in the battery pack 100.

In the prior art, the electrical module of the Battery pack includes a BDU (i.e., battery Disconnect Unit, battery pack cut-off unit) and a BMS (i.e., battery MANAGEMENT SYSTEM, battery management system). The BDU realizes the functions of high-voltage on-off and safety protection through the control of the BMS. In practical application, electric module concentrates in one side of battery package, sets up long busbar and realizes the inside electric connection of battery package, and long busbar includes three at least.

The present application divides the electrical module 3 into the first electrical portion 32 and the second electrical portion 33, and can reduce the circuit connection penetrating the front and rear 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 in the battery pack 100.

According to the battery pack 100 of the embodiment of the present application, by providing the electrical module 3 as the first electrical portion 32 and the second electrical portion 33, the electrical layout in the battery pack 100 can be facilitated, and the spatial arrangement of the electrical module 3 inside the battery pack 100 can be optimized. In the prior art, the space occupied by the electrical module in the battery pack is smaller than the space occupied by the battery pack, and the height dimension of part of the electrical module is larger than the height dimension of the battery pack, so that the dimension of the housing needs to be increased in order to accommodate the electrical module in the housing, the dimension of the whole battery pack is also increased, and the utilization rate of the internal space of the battery pack is reduced. In the application, the height of the electric module 3 can be conveniently reduced after the design is optimized, for example, the height dimension of the battery pack 2 is larger than or equal to the height dimension of the electric module 3, thereby avoiding the increase of the dimension of the battery pack 100 caused by the overhigh height of the electric module 3 and improving the utilization rate of the internal space of the battery pack 100. The height dimension of each part herein refers to the dimension of the part in the height direction (i.e., the up-down direction shown as D1 in fig. 1).

Specifically, the battery pack 2, the first electrical portion 32, and the second electrical portion 33 are located in different accommodating sub-chambers V10. Further, the battery pack 2 includes a plurality of battery packs 20, each battery pack 20 including a plurality of battery cells 201. The plurality of battery packs 20 are located in different accommodating sub-chambers V10, and the battery packs 20, the first electrical portion 32, and the second electrical portion 33 are located in different accommodating sub-chambers V10. In some versions, the receiving subchamber V10 comprises a front subchamber V11 for receiving the second electric portion 33. The receiving subchamber V10 includes a rear subchamber V12 for receiving the first electrical portion 32.

Specifically, the shape of the frame 10 generally determines the overall shape of the battery pack 100, and the frame 10 is a square frame, a hexagonal frame, or the like. The frame 10 is generally quadrilateral. Specifically, the frame 10 is formed by sequentially connecting a plurality of frame side rails 10-1, and each side frame side rail 10-1 constitutes one side wall of the housing 1. When the frame 10 is rectangular, four sides of the rectangle constitute the front side wall 11, the rear side wall 12, the left side wall 13, and the right side wall 14 of the housing 1. Further, the housing 1 further includes a mounting beam 17 connected to the frame 10, and the mounting beam 17 may be mounted on the frame side rail 10-1, for example, the mounting beam 17 is mounted on each of the front side wall 11, the rear side wall 12, the left side wall 13, and the right side wall 14. Further, when the battery pack 100 is assembled, the frame side rail 10-1 of the frame 10 is coupled to the top cover 16 and the bottom sheathing plate 15 by bolts to improve coupling reliability.

Alternatively, the top of the battery pack 2 is directly adhesively attached to the top cover 16 at the time of assembly, so that the two are combined into a non-separable body. Alternatively, the bottom of the battery pack 2 is directly adhesively attached to the bottom guard plate 15 during assembly, so that the two are combined into a non-separable body. Of course, the present application is not limited thereto, and the bottom guard 15 may be provided as a detachable connection structure to facilitate the detachment and maintenance of the battery pack 100 from the bottom. The top cover 16 may also be provided with a removable attachment structure to facilitate removal and maintenance of the battery pack 100 from the top. In some embodiments, the top of the battery pack 2 is not in direct contact with the top cover 16, but is spaced by an insulating layer, and the battery pack 2 is glued and fixed by the insulating layer, so that upward heat transfer from the battery pack 2 is blocked.

In some embodiments, a side access opening 101 is provided in a side wall of the housing 1, and the first electrical portion 32 is disposed directly opposite the side access opening 101. If the rear side wall 12 is provided with a side access opening 101, the first electrical portion 32 is located at the rear side of the battery pack 2 and is disposed opposite to the side access opening 101. The side access opening 101 is provided to adapt the shape of the vehicle 1000 when the battery pack 100 is applied to the vehicle 1000, and spaces the side wall of the housing 1 from the side wall of the upper cavity 240 when the upper cavity 240 is provided at the bottom of the vehicle 1000 (as shown in fig. 38 and 39). As shown in fig. 39, the upper cavity 240 leaves room behind the side access opening 101, and the side access opening 101 of the battery pack 100 can be opened below the vehicle 1000 to perform maintenance on the first electrical portion 32.

In some embodiments, the second electrical portion 33 is located on the front side of the battery pack 2. In some embodiments, as shown in fig. 6-8, the first electrical portion 32 includes a BMS master board 322 and a BMS slave board 323 for signal control. Specifically, the first electrical section 32 also includes a first BDU module 321. The first BDU module 321 is located between the BMS master board 322 and the BMS slave board 323. Further, as shown in fig. 9, the second electrical section 33 includes a second BDU module.

Specifically, the BMS master control board 322 and the BMS slave control board 323 realize the functions of high-voltage on-off and safety protection by matching the first BDU module 321 and the second BDU module, and the BMS master control board 322 and the BMS slave control board 323 are in communication connection through the wire harness of the electric connection structure 31, and the BMS master control board 322 and the BMS slave control board 323 are in communication connection with the first BDU module 321 and the second BDU module through the wire harness of the electric 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 with the battery pack 2 through the copper bar 317. In the first electrical part 32, the BMS main control board 322, the first BDU module 321, and the BMS slave control board 323 are sequentially disposed along the second direction D2. The harness portion of the electrical connection structure 31 includes a plurality of harnesses as shown in fig. 7.

Here, the first BDU module 321 is disposed between the BMS main control board 322 and the BMS slave control board 323, so that the first BDU module 321 is conveniently disposed in the middle, and thus the first BDU module 321 and the battery pack 2 are conveniently connected to achieve symmetry. When the voltage division protection needs to be performed on the battery pack 2, the first BDU module 321 and the two battery groups 20 of the battery pack 2 are symmetrical, so as to facilitate voltage division balance.

Specifically, the BMS master control board 322 and the BMS slave control board 323 are detachably disposed through the side access port 101, and it is understood that, from the point of failure frequency, the failure rate of the BMS master control board 322 and the BMS slave control board 323 is higher, so that they are detachably connected, and the maintenance and inspection can be directly detached when the failure is facilitated.

In the first electrical module 3, the BMS slave board 323 includes at least one, and the BMS slave board 323 may collect and transmit battery cell data of the battery pack 2 and transmit the BMS master board 322 through the electrical connection structure 31. Thus, the BMS slave control board 323 may be provided according to the number of the battery cells 201 included in the battery pack 2.

Specifically, the BMS slave plates 323 include two, and the two BMS slave plates 323 are stacked in the height direction. Wherein, the dimension of the BMS slave control plate 323 in the first direction D1 is 86.5mm, the dimension of the BMS slave control plate 323 in the second direction D2 is 240mm, the height dimension is 19.7mm, and the height of the two BMS slave control plates 323 after being overlapped is 48.7mm. The size of BMS main control board 322 in the direction of first direction D1 is 102mm, and the size of BMS main control board 322 in the second direction is 260mm, and the high size of BMS mainboard is 24mm. The dimension of the first BDU module 321 in the first direction D1 is 103mm, the dimension of the first BDU module 321 in the second direction D2 is 153mm, and the height dimension of the first BDU module 321 is 85.5mm. Along the second direction D2, the sizes of the BMS slave board 323, the BMS master board 322, and the first BDU module 321 in the first electrical part 321 are at least 653mm.

As shown in conjunction with fig. 10 and 11, the height dimensions of both the first electrical portion 321 and the second electrical portion 302 are lower than the battery pack 2.

In some embodiments, as shown in fig. 17, 18 and 11, the BMS slave control boards 323 are disposed in the left-right direction, at least two BMS slave control boards 323 are disposed in a stacked manner in the height direction, and the projections of all BMS slave control boards 323 on the rear sidewall 12 are located entirely within the side access opening 101. Thus, the BMS slave control plate 323 can be directly pulled in the horizontal direction during disassembly and assembly, and collision caused by tilting is reduced. When the side access port 101 is opened, the state of the BMS slave control plate 323 can be visually observed without taking out the BMS slave control plate 323.

As shown in fig. 18, 19 and 11, the BMS main control panel 322 is disposed in the left-right direction, and the projection of the BMS main control panel 322 on the rear sidewall 12 is completely located in the side access opening 101. Therefore, the BMS main control board 322 can be directly pulled in the horizontal direction during disassembly and assembly, and collision caused during tilting is reduced. When the side access port 101 is opened, the state of the BMS slave control panel 323 can be visually observed without taking out the BMS master control panel 322.

In some embodiments, as shown in fig. 12-14, the battery pack 100 further includes a support frame 4, where the support frame 4 is located in the housing 1, and the first electrical portion 32 is mounted on the support frame 4, and the support frame 4 can support the first electrical portion 32, so as to reduce shaking of the first electrical portion 32 during the movement of the battery pack 100, thereby improving the safety of the battery pack 100. In addition, the first electric part 32 can be lifted by the support frame 4, so that the first electric part is convenient to be opposite to the side access hole 101.

Specifically, the support bracket 4 is located within the rear sub-chamber V12 and connects the rear side wall 12 and an adjacent dividing cross member 51 (described below). Optionally, the front and rear ends of the support frame 4 are bolted or welded to the dividing beam 51 and the rear side wall 12, respectively.

A plurality of first threaded holes 411 are formed in one side of the support frame 4 facing the side access opening 101, and the plurality of first threaded holes 411 are distributed in sequence along the second direction D2. The BMS master control board 322 and the BMS slave control board 323 can be directly or indirectly connected with the support frame 4 through bolts and are connected to the first threaded holes 411, so that the assembly and the disassembly are convenient.

In some embodiments, as shown in fig. 16-19, the first electrical portion 32 includes: two mounting plates 324, a BMS master plate 322 and a BMS slave plate 323 are respectively mounted on the respective mounting plates 324, and the mounting plates 324 are fixed in the housing 1 by first bolts 3291. The first bolt 3291 is disposed in the front-rear direction, a head of the first bolt 3291 is located at a rear end, and the first bolt 3291 is located in the side access opening 101 in projection on the rear side wall 12.

Specifically, as shown in fig. 16, the BMS main control board 322 is connected to a mounting plate 324, for example, by vertically disposed bolts. Specifically, as shown in fig. 18, the BMS slave control plate 323 is coupled to another mounting plate 324, for example, fixedly coupled by vertically disposed bolts. Specifically, as shown in fig. 13 and 14, a mounting plate 324 with a BMS master control plate 322 or a BMS slave control plate 323 is placed on the support frame 4 at the time of assembly, and a downward extending flange 3241 is formed on the side of the mounting plate 324 facing the side access opening 101. As shown in fig. 16 to 19, the flange 3241 is provided with a mounting hole 3242 corresponding to the first screw hole 411, and the first bolt 34 is fixed by passing through the mounting hole 3242 and the first screw hole 411 in order.

As shown in fig. 12-14, the support frame 4 includes four support crossbars 41 distributed along a first direction D1, each support crossbar 41 extends along a second direction D2, two support crossbars 41 are close to the side access hole 101, the other two support crossbars 41 are far away from the side access hole 101, a first threaded hole 411 is formed in each support crossbar 41, and an avoidance groove 412 is formed in the support crossbar 41 close to the side access hole 101, and the avoidance groove 412 corresponds to the first threaded hole 411 far away from the side access hole 101.

The mounting plate 324 is provided with two flanges 3241 distributed along the first direction D1, and each flange 3241 is provided with a mounting hole 3242. The mounting panel 324 is arranged on support frame 4, and the one side of mounting panel 324 towards side access hole 101 forms downwardly extending's turn-ups 3241, is equipped with the mounting hole 3242 that corresponds first screw hole 411 on the turn-ups 3241, and first bolt 34 can pass mounting hole 3242, first screw hole 411 in proper order, realizes the fixed between mounting panel 324 and the support frame 4 to first bolt 34 sets up on support frame 4 along the second direction D2 direction, reducible interference when the dismouting improves the efficiency of installation or dismantlement. And the flange 3241 also locates the mounting location of the mounting plate 324 and assists in securing the mounting plate 324 to the support frame 4. The flange 3241 of the mounting plate 324 faces the side access hole 101 and extends downward, the flange 3241 is an entire strip, and a mounting hole 3242 is provided at a position corresponding to the first threaded hole 411. Or, the flanges 3241 are elongated and provided with the avoiding grooves 412, and the flanges 3241 are respectively provided at corresponding positions of the first screw holes 411.

In some embodiments, as shown in fig. 12 and 13, the support stand 4 further includes four support rails 40, each support rail 40 extending along the first direction D1, and the four support rails 40 include a first rail 401, a second rail 402, a third rail 403, and a fourth rail 404, respectively, that are sequentially disposed. A support cross bar 41 is connected between the first longitudinal bar 401 and the second longitudinal bar 402, and a support cross bar 41 is connected between the third longitudinal bar 403 and the fourth longitudinal bar 404.

The first electrical section 32 comprises two detachable devices, which are located on the support rails 41 on both sides, respectively. Thus, the support longitudinal bars 40 and the support transverse bars 41 in the support frame 4 can support the detachable devices, and by arranging the support frame 4 as a combination between the support bars 40 and the support transverse bars 41, compared with arranging the support frame 4 as a whole support plate, on the one hand, the support bars 40 are light in weight, the structural strength is met, and meanwhile, the weight of the whole battery pack 100 can be reduced; on the other hand, the support bar 40 has simple manufacturing process, can reduce the production cost and improve the production efficiency. Specifically, the two detachable devices are a BMS master board 322 and a BMS slave board 323.

Specifically, the support rails 41 are connected between the first vertical bar 401 and the second vertical bar 402, and the support rails 41 include two, two support rails 41 are disposed along the first direction D1, and each support rail 41 includes a mounting hole 3242 thereon. The support rail 41 near the front of the first direction D1 is a first support rail, and the support rail 41 near the rear of the first direction D1 is a second support rail. Wherein the height dimension of the second support rail is partially higher than the height dimension of the first support rail 41 and the mounting holes 3242 on the second support rail can be fully exposed. At the mounting hole 3242, the first and second support rails are the same height dimension.

In some alternative embodiments, as shown in fig. 32, to improve the support firmness of the support frame 4, the housing 1 further includes a triangular reinforcing plate 68, where two right-angle sides of the triangular reinforcing plate 68 are respectively connected to the support frame 4 and the adjacent separation beam 51, and the triangular stability is utilized to improve the support degree and the connection reliability of the support frame 4 and the adjacent separation beam 51. Optionally, the triangular reinforcing plate 68 is welded to the support frame 4. Optionally, a triangular reinforcing plate 68 is welded to the dividing beam 51.

Further, the BMS slave control board 323 is detachably connected to the first and second longitudinal bars 401 and 402 through one mounting plate 324, and the BMS master control board 322 is detachably connected to the third and fourth longitudinal bars 403 and 404 through another mounting plate 324. The BMS master control board 322 and the BMS slave control board 323 are connected by the support vertical bars 40 at the ends, so that the positioning is convenient, and the connection length in the first direction D1 is increased.

Still further, the first BDU module 321 may be mounted on the second and third longitudinal bars 402 and 403, for example, the first BDU module 321 includes a first electrical housing 3011, and the first electrical housing 3011 is connected to the second and third longitudinal bars 402 and 403 by vertically disposed bolts.

In some embodiments, as shown in fig. 10, 20, and 21, the first BDU module 321 includes: a first electrical housing 3211 and a fuse 3212, the first electrical housing 3211 being provided with a first opening 3211a at a rear side, the fuse 3212 being detachably provided in the first electrical housing 3211. Specifically, the fuse 3013 is detachably attached to the first electrical enclosure 3011. After the electrical connection is cut off when the battery pack 100 fails, the fuse 3013 needs to be replaced or manually reset.

Specifically, the first BDU module 321 further includes a side protecting cover 3217, and the side protecting cover 3217 is detachably covered at the first opening 3211 a. By providing the first electrical housing 3211 and the side cover 3217, on the one hand, the internal electrical components of the first BDU module 321, such as the fuse 3212, may be protected. On the other hand, the internal electric components such as the fuse 3212 are provided in the first electric housing 3211, thereby realizing the fixation and the installation of the internal electric components, and improving the convenience and the reliability of the fixed connection. Further, as shown in fig. 21, two ends of the side protecting cover 3217 are provided with second fastening portions 3217a, and the side protecting cover 3217 may be fastened to the first electrical housing 3211 by the second fastening portions 3217 a.

In some embodiments, as shown in fig. 21, the side protecting cover 3217 includes a cambered surface plate 3217b located between the second fastening parts 3217a at two sides, and the shape of the cambered surface plate is adapted to the fuse 3212, so as to improve compactness and constraint on the fuse 3212. The cambered surface plate 3217b can be a circular arc plate, and optionally, the cambered surface plate 3217b is a grid plate, so that the heat dissipation effect is improved. By providing the second snap-in portion 3217a connection structure, stability and convenience of connection are improved. By providing the side shield 3217 as a circular arc-shaped grating plate, the structural strength of the side shield 3217 can be improved.

Specifically, the first BDU module 321 further includes: a current sensor 3213, the current sensor 3213 being connected in series with the fuse 3212, the current sensor 3213 being detachably provided within the first electrical enclosure 3211. Thus, the current sensor 3213 can timely detect the current passing through the fuse 3212, so that the BMS slave board 323 can timely judge whether the fuse 3212 needs to be fused.

Here, the internal circuit structures and specific working principles of the fuse 3212, the current sensor 3213, the BMS master control board 322, and the BMS slave control board 323 are all in the prior art, and are not described herein again.

Specifically, as shown in fig. 21, the fuse 3212 is fixed to the first electrical housing 3211 by the second bolts 3292, the heads of the second bolts 3292 are disposed toward the side access opening 101, and the second bolts 3292 are projected on the rear side wall 12 to be located in the side access opening 101, thereby improving reliability and stability of connection of the fuse 3212 to the first electrical housing 1.

When the fuse 3212 is failed and needs to be replaced, the second fastening portion 3217a is firstly unlocked, the side protecting cover 3217 is separated from the first electric shell 3211 to expose the second bolt 3292, then the second bolt 3292 is unscrewed, the fixed connection between the fuse 3212 and the first electric shell 3211 is released, and finally the failed fuse 3212 is taken out through the side access hole 101.

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 disposed toward the side access opening 101, and the third bolt 3293 is located in the side access opening 101 on the rear side wall 12, thereby improving reliability and stability of connection of the current sensor 3213 to the first electrical housing 1.

When the current sensor 3213 is failed and needs to be replaced, the second fastening portion 3217a is first unlocked, the side protecting cover 3217 is separated from the first electrical casing 3211 to expose the third bolt 3293, then the third bolt 3293 is screwed out, the fixed connection between the current sensor 3213 and the first electrical casing 3211 is released, and finally the failed current sensor 3213 is taken out through the side access opening 101.

In some embodiments, as shown in fig. 21, a first positioning cavity 3211e and a second positioning cavity 3211h which are opened towards the side access opening 101 are provided in the first electrical housing 3211, the fuse 3212 is located in the first positioning cavity 3211e, and the current sensor 3213 is located in the second positioning cavity 3211 h. Thus, the fuse 3212 and the current sensor 3213 are respectively positioned by the first positioning cavity 3211e and the second positioning cavity 3211h, so that the assembly is convenient.

Specifically, a first positioning boss 3211c is formed in the first electrical housing 3211 on at least one side of the first positioning cavity 3211e, and an end portion of the fuse 3212 is detachably connected to the first positioning boss 3211c. The fuse 3212 is fixedly connected to the side surface, and thus the fuse 3212 is less obstructed.

A second positioning boss 3211f is formed in the first electrical housing 3211 at least on one side of the second positioning cavity 3211h, and an end portion of the current sensor 3213 is detachably connected to the second positioning boss 3211f. The current sensor 3213 is fixedly connected to the side surface, and thus, there is little obstacle to the current sensor 3213.

Further, the surfaces of the first positioning boss 3211c and the second positioning boss 3211f facing the side access hole 101 are respectively provided with a threaded hole, the fuse 3212 is connected to the first positioning boss 3211c through a bolt, and the current sensor 3213 is connected to the second positioning boss 3211f through a bolt. The bolt connection can be convenient and quick, and the sight is not influenced.

In some specific embodiments, as shown in fig. 21, two first positioning bosses 3211c are provided in the first electrical housing 3211, a second threaded hole 3211d is provided on a rear surface of the first positioning boss 3211c, 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, two ends of the fuse 3212 are connected to the two first positioning bosses 3211c through second bolts 3292, and each second bolt 3292 is in threaded fit in the second threaded hole 3211 d.

The first electric shell 3211 is provided with two second positioning bosses 3211f, the rear surface of each second positioning boss 3211f is provided with a third threaded hole 3211g, 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, two ends of the current sensor 3213 are connected to the two second positioning bosses 3211f through third bolts 3293, and each third bolt 3293 is in threaded fit with the third threaded hole 3211 g.

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

Alternatively, the first positioning boss 3211c and the second positioning boss 3211f are staggered in height and are not equidistant from the side access opening 101.

Further, the two first positioning bosses 3211c are arranged along the left-right direction, the two second positioning bosses 3211f are different in height from 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-rear direction. In this way, the current sensor 3213 of the fuse 3212 is staggered in the front-rear direction when being attached and detached, which is advantageous in reducing the size of the first BDU module 321 in the height direction and the front-rear direction.

Specifically, the first positioning boss 3211c is located below the second positioning boss 3211f, so that the fuse 3212 is mounted below the current sensor 3213. In addition, the fuse 3212 is located at the rear side of the current sensor 3213, closer to the side access opening 101. In terms of the frequency of failure, the fuse 3212 having a higher failure rate is more easily removed.

Advantageously, as shown in fig. 21, the first BDU module 321 further includes: and a first conductive sheet 3214, wherein the first conductive sheet 3214 is located in the first positioning cavity 3211e and is located at one side of the fuse 3212 away from the side access opening 101, one end of the first conductive sheet 3214 is pressed at one side of the fuse 3212 away from the side access opening 101, and the other end of the first conductive sheet is pressed at one side of the current sensor 3213 away from the side access opening 101, so that the first conductive sheet 3214 is connected with the fuse 3212 and the current sensor 3213 in series, and the two are not influenced to be observed and disassembled from the side access opening 101.

In some embodiments, as shown in fig. 21, the first BDU module 321 further includes: the first conductive piece 3214, the first conductive piece 3214 is located within the first positioning cavity 3211e and on a front side of the fuse 3212. A second positioning boss 3211f is located directly above a first positioning boss 3211c, and the lateral dimension of the current sensor 3213 is smaller than the lateral dimension of the fuse 3212. A portion of the side edge of the first conductive sheet 3214 is bent and connected to a first positioning boss 3211c after extending in the lateral direction so as to be electrically connected to the fuse 3212. The upper edge of the first conductive sheet 3214 extends upward and is bent and connected to another second positioning boss 3211f to be electrically connected to the current sensor 3213.

In this way, the fuse 3212 and the current sensor 3213 are connected in series by the first conductive sheet 3214, and the first conductive sheet 3214 is not easily separated, so that the reliability is high, and the width of the first conductive sheet 3214 can be set large, which is advantageous in reducing the resistance and the like.

Specifically, as shown in fig. 21, the first electric housing 3211 is provided with a second opening 3211b at the top. The first BDU module 321 further includes: the top cover 3216 and two second conductive pieces 3215 are provided at the top of the first electrical housing 3211 at right and left intervals, and each of the second conductive pieces 3215 is provided to extend in the front-rear direction.

The rear end of one second conductive piece 3215 is bent downwards and then is lapped on a first positioning boss 3211c and is electrically connected with the fuse 3212, the rear end of the other second conductive piece 3215 is bent downwards and then is lapped on a second positioning boss 3211f and is electrically connected with the current sensor 3213, and the front ends of the two second conductive pieces 3215 are respectively connected with the battery pack 2 through copper bars 317. A top cover 3216 is detachably attached to the top of the first electrical housing 3211 and covers over the two second conductive sheets 3215.

The top protecting cover 3216 is convenient to assemble, disassemble and maintain, and the second conducting strip 3215 is restrained to a certain degree. So set up, connect electric reliability high, the part is changed more nimble moreover.

Alternatively, as shown in fig. 20 and 21, the current sensor 3213 has a first socket 32131 at a rear side, and a first penetrating hole 3216a facing the first socket 32131 is provided in the top cover 3216.

As shown in fig. 7 and 8, the electrical connection structure 31 includes: the first flexible wires 3111 are located at the rear side of the first BDU module 321, and the ends of the first flexible wires 3111 are provided with first plug connectors 3112, where the first plug connectors 3112 are plug-fitted into the first plug connectors 32131 through the first through holes 3216 a.

In this way, the first plug connector 3112 can be directly pulled out from the side access port 101 during attachment and detachment. The first flexible conductor 3111 is pulled out, and then the internal structure of the first BDU module 321 is checked or disassembled. When the assembly is completed, the first plug connector 3112 is directly inserted from the rear side, so that the assembly is very convenient, and the disorder interference is reduced.

Optionally, as shown in fig. 20 and 21, a top surface of the top cover 3216 is provided with a limiting groove 3216b extending back and forth, a front end of the limiting groove 3216b is opposite to the first through hole 3216a, and a part of the first flexible conductor 3111 is located in the limiting groove 3216 b. The limiting groove 3216b can restrict the first flexible conductor 3111, reduce shake of the first flexible conductor 3111 during vibration, and reduce the probability of looseness caused by shake. Moreover, the first flexible conductive wire 3111 is thinner and lighter in weight than other conductive wires, so that connection reliability can be improved, and use safety of the battery pack 100 can be improved.

Optionally, a limiting protrusion 3216c is further provided on the top cover 3216 at least on one side of the limiting slot 3216b, so as to further constrain the first flexible conductor 3111 and improve the use safety thereof. Further, as shown in fig. 21, two limiting protrusions 3216c are provided on the top protecting cover 3216, and barbs are formed on the ends of the two limiting protrusions 3216c to facilitate hanging the first flexible conductor 3111.

Further, as shown in fig. 21, first fastening portions 3216d are provided at two ends of the top cover 3216, and the top cover 3216 may be fastened to the first electrical housing 3211 by the first fastening portions 3216 d. By arranging the first fastening part 3216d connection structure, the stability and convenience of connection are improved.

In some embodiments, as shown in fig. 7, 8 and 10, the rear side of the BMS main control board 322 is provided with a second socket 3221, and the rear side of the BMS slave control board 323 is provided with a third socket 3231. The electrical connection structure 31 further includes: and a second flexible wire 3113 positioned at the rear side of the BMS main control board 322, wherein a second plug connector 3114 is provided at an end of the second flexible wire 3113, and the second plug connector 3114 is fitted within the second plug interface 3221.

The electrical connection structure 31 further includes: and a third flexible wire 3115 positioned at the rear side of the BMS slave control board 323, the end of the third flexible wire 3115 is provided with a third socket 3116, and the third socket 3116 is fitted within the third socket 3231.

In this way, the second plug connector 3114 and the third plug connector 3116 can be directly pulled out from the side access port 101 when the plug connector is attached and detached. The second flexible wire 3113 is pulled out, and the structure of the BMS main control board 322 can be checked or disassembled. The third flexible wires 3115 are pulled out, and the BMS slave board 323 structure can be checked or disassembled.

When the assembly is completed, the second connector 3114 and the third connector 3116 are directly inserted from the rear side, so that the assembly is very convenient and the disorder interference is reduced.

As shown in fig. 6 and 8, in some embodiments, the electrical connection structure 31 includes a first wire harness 311, where the first wire harness 311 is disposed around the first electrical portion 31, the first wire harness 311 is electrically connected to the battery pack 2, and plug connectors respectively plugged into the BMS master control board 302, the BMS slave control board 303, and the first BDU module 321 are disposed on the first wire harness 311, and the plug connectors are located on a side of the first electrical portion 31 facing the side access hole 101. The first wire harness 311 is arranged around the first electrical portion 31, and the plugging direction of the plugging connector on the first wire harness 311 can be changed, so that the plugging direction of the plugging connector on the first wire harness 311 faces the side access opening 101. Thus, the first harness 311 can be pulled out more easily through the side access port 101, and the convenience of maintenance is further improved.

Specifically, the first flexible conductor 3111, the second flexible conductor 3113, and the third flexible conductor 3115 are all led out from the first bundle 311.

Specifically, the first harness 311 is provided with a plurality of harness buttons that are disposed at intervals along the extending direction of the first harness 311, and the attaching/detaching direction of the harness buttons is toward the side access opening 101. Through a plurality of pencil buckles, can fix first pencil 311, reduce first pencil 311 swing and reduce the probability that grafting joint grafting on the first pencil 311 is not firm.

In some embodiments, as shown in fig. 1 and 3, the battery pack 100 further includes a side access cover 64, the side access cover 64 may cover at the side access opening 101, and the side access cover 64 may be openably and closably connected to the rear sidewall 12. The side access cover 64 may protect the structure inside the battery pack 100 from dust, moisture, etc. entering the inside of the battery pack 100 through the side access port 101.

Specifically, as shown in fig. 15, the rear side wall 12 has a plurality of first fixing holes 111 thereon, and is arranged at intervals along the circumferential direction of the side access opening 101. The side access cover 64 may cover the side access opening 101, and the side access cover 64 includes a plurality of through holes corresponding to the positions of the first fixing holes 111, and the first fixing holes 111 and the through holes are connected by fasteners, thereby improving the connection stability.

Or, the side access cover 64 is connected to the rear side wall 12, one side edge of the side access cover 64 can be turned over relative to the rear side wall 12, and other side edges 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.

Specifically, the dimension of the side access port 101 in the second direction D2 is 720mm, and the height dimension of the side access port 101 is 70mm. The height dimension of the first electrical part 32 is smaller than that of the side access opening 101, whereby the BMS master control board 322, the BMS slave control board 323, and the first BDU module 321 in the first electrical part 32 can be respectively passed through the side access opening 101.

Specifically, when one of the BMS master control board 322, the BMS slave control board 323, and the first BDU module 321 needs to be replaced, the fasteners in the first fixing holes 111 are released, the side access cover 64 is removed, and the harness buckles 91 can be detached one by one through the first access opening 12, the plug connectors are removed, and the failed electric devices pass through the side access opening 101.

In some embodiments, as shown in fig. 7 and 8, the electrical connection structure 31 includes a second wire harness 312, a third wire harness 313, and a fourth wire harness 314. The second wire harness 312 is provided along the length direction of the second electric portion 33, and the second wire harness 312 is detachably connected to at least one end of the second electric portion 33, so that the electric connection structure 31 is electrically connected to the second electric portion 33.

The third wire harness 313 is connected between the first wire harness 311 and the second wire harness 312, thereby enabling communication between the first electrical portion 31 and the second electrical portion 33 of the first electrical portion 31. The fourth wire harness 314 is connected to the third wire harness 313, and a low-voltage electrical terminal 316 is provided at the end of the fourth wire harness 314, through which the battery pack 100 can perform signal transmission with a device external to the battery pack 100.

In some embodiments, to reduce rattling of the electrical connection structure 31 within the battery pack 100, a plurality of snaps may be provided to restrain the wiring harness.

Specifically, as shown in fig. 7, a first fastening member 361 may be provided to fasten the first wire harness 311, for example, the first wire harness 311 may be fastened to a partition beam 51. A second snap 362 may be provided to restrain the second wire bundle 312, such as by tying the second wire bundle 312 to the partition stringers 52. A third catch 363 may be provided to restrain the third wire harness 313, such as the third wire harness 314 may be strapped to a dividing beam 51.

Optionally, a fourth catch 364 may also be provided to restrain the fourth bundle 314, such as by binding the fourth bundle 314 to a dividing beam 51. Optionally, a fifth fastening component 365 may be provided to constrain the first wire harness 311, the first fastening component 361 being located on the front side of the first electrical portion 32, the fifth fastening component 365 being located on the rear side of the first electrical portion 32, e.g., the fifth fastening component 365 may be fastened to the support frame 4 or the rear sidewall 12.

In some embodiments, as shown in fig. 13 and 6, the partition assembly 5 comprises at least one partition beam 50, which may comprise, for example, at least one partition cross beam 51, or at least one partition longitudinal beam 52, for cooperating with the frame 10 to divide the containing cavity V1 into a plurality of containing sub-cavities V10. Each of the partition cross members 51 is provided to extend in the left-right direction, and the partition longitudinal members 52 are provided to extend in the front-rear direction.

In some embodiments, as shown in fig. 3 and 14, the partition assembly 5 includes: at least three dividing beams 51, the dividing beams 51 are arranged to extend in the left-right direction, and the at least three dividing beams 51 are arranged to be spaced apart in the front-rear direction.

The battery pack 2 is located between the foremost dividing beam 51 and the rearmost dividing beam 51. The foremost dividing beam 51 and the front side wall 11 define a front subchamber V11 therebetween, and the second electrical portion 33 is located within the front subchamber V11. The last dividing beam 51 defines a rear subchamber V12 with the rear side wall 12, and the first electrical portion 32 is located within the rear subchamber V12.

The arrangement of at least three dividing beams 51, which divide the inside of the case 1 of the battery pack 100 into areas, not only improves the structural strength of the battery pack 100, but also provides an installation location of the internal structure. In addition, the provision of at least three dividing beams 51 also enables restricting the internal fluid discharge direction.

Specifically, the partition assembly 5 further includes: at least two partition stringers 52, the partition stringers 52 are arranged to extend in the front-rear direction, and a partition stringer 52 is connected between each adjacent two partition crossbeams 51. Adjacent two dividing cross members 51, a dividing longitudinal member 52 and side walls of the housing 1 define therebetween a receiving compartment V10, and the battery pack 2 includes a plurality of battery packs 20, each of the receiving compartment V10 housing one of the battery packs 20.

In fig. 3 and 4, the battery pack 2 includes four battery packs 20, each battery pack 20 being located in a housing compartment V10.

In some embodiments, as shown in fig. 14 and 6, each dividing beam 51 includes: the lower beam 511 and the upper beam 512, the lower beam 511 extends along the left-right direction, and two ends of the lower beam 511 are respectively connected with the left side wall 13 and the right side wall 14 of the shell 1. The upper cross beams 512 extend in the left-right direction, the upper cross beams 512 are fixedly connected above the lower cross beams 511, and each lower cross beam 511 is connected with at least two spaced upper cross beams 512.

On the same dividing beam 51, a first gap 5131 is defined between the left upper beam 512 and the left side wall 13 of the housing 1, a second gap 5132 is defined between the right upper beam 512 and the right side wall 14 of the housing 1, a third gap 5133 is defined between two adjacent upper beams 512, and a third gap 5133 is arranged above the joint of two adjacent dividing stringers 52.

This bridging scheme of the transverse and longitudinal beams can not only facilitate installation, but also support the third wire 313 when the third wire 313 passes through the battery pack 2. Not only the ordering of the wires is improved, but also the third wire harness 313 is not plugged into the accommodating sub-chamber V10, reducing the probability that the pressure relief member 202 sprays the internal electrolyte toward the third wire harness 313, thereby reducing the risk of the third wire harness 313 being shorted, opened.

Specifically, the third wire harness 313 is fastened to the partition stringers 52 by the wire harness, so that rattling of the third wire harness 313 during vibration is reduced, and the probability of rattling caused by rattling is reduced.

In some embodiments, as shown in fig. 6 and 8, a first wire harness 311 is positioned within the rear sub-chamber V12 and disposed around the first electrical portion 32, the first wire harness 311 is electrically connected to the battery pack 2, and the first wire harness 311 is detachably electrically connected to the first electrical portion 32. The second harness 312 is positioned in the front sub-chamber V11 and is disposed in the left-right direction at the rear side of the second electrical portion 33, and the second harness 312 is detachably electrically connected to the second electrical portion 33. Thus, the first wire harness 311 and the second wire harness 312 are also respectively restrained, shaking is reduced, and the connection loosening risk caused by shaking is reduced.

Further, as shown in fig. 6, the battery pack 100 further includes: at least one fastening sleeve 53 for connecting to an external seat, the fastening sleeve 53 being arranged on the partition assembly 5. For example, the fastening sleeve 53 is fixedly connected to at least one dividing beam 51, and at least two fastening sleeves 53 are spaced apart in the left-right direction of the dividing beam 51. When the battery pack 100 is applied to the vehicle 1000, the seat in the riding space 220 can be matched with the fastening sleeve 53 through the fastening piece, so that a seat mounting beam is not required to be additionally arranged in the riding space 220, the structural compactness is improved, and the number of parts is reduced.

Optionally, the partition beam 51 is provided with fastening sleeves 53 corresponding to the seat fixing fasteners 66 one by one, and the lower ends of the seat fixing fasteners 66 are screwed into the fastening sleeves 53.

Alternatively, as shown in fig. 6 and 1, the partition beam 51 has a height smaller than that of the housing 1, the fastening sleeves 53 are welded to the top of the partition beam 51, and the top cover 16 of the housing 1 is provided with seat fixing fasteners 66 facing each of the fastening sleeves 53. The seat can be connected with the seat fixing fastener 66 and the fastening sleeve 53 through the fasteners, so that the length of the seat matched in the vertical direction is lengthened. And when the seat is stressed, the acting force is conducted to the whole battery pack 100, and the impact force is dispersed by the whole battery pack 100.

In some embodiments, as shown in fig. 2, the battery cells 201 in the battery pack 20 are disposed in the left-right direction, and the battery cells 201 are provided with pressure release members 202 at the left and/or right ends. In the example of fig. 2, in each battery pack 20, a pressure relief member 202 is provided on each battery cell 201 to improve the safety thereof. The number of pressure release members 202 per cell 201 may be one or more, and is not limited herein.

Specifically, the battery cell 201 is sheet-shaped and extends in the second direction D2. The plurality of battery cells 201 are stacked in the first direction D1 to form one battery pack 20, thereby advantageously increasing the arrangement density of the battery packs 20 and increasing the energy density of the battery pack 100.

The battery group 20 forms a circulation channel V101 between the left end and the right end and the inner wall of the accommodating sub-cavity V10, so that no additional channel is needed, and the high-pressure gas discharged by the pressure release member 202 is discharged by utilizing the channel between the end of the battery group 20 and the inner wall of the accommodating sub-cavity V10, thereby improving the utilization rate of the inner space. This flow channel V101 may also function as a buffer channel for the battery packets 20.

Alternatively, the width x1 of the flow channel V101 may be up to 20-50mm, whereby the flow-through of the flow channel V101 is effectively ensured without being too wide to occupy too much volume. Alternatively, the width x1 of the flow channel V101 is up to 35mm. Here, the width x1 of the flow channel V101 refers to its dimension in the second direction D2.

Correspondingly, at least one of the front side wall 11 and the rear side wall 12 may be provided with an air pressure balance valve 65 so that air flow with the flow passage V101 can be discharged from the air pressure balance valve 65.

Alternatively, as shown in fig. 5, the rear side wall 12 of the housing 1 is provided with a through outer port 102, so that the discharged high-pressure gas can be discharged from a certain outer port 102. Further alternatively, as shown in fig. 5, at least one of the external ports 102 is provided with a pressure balance valve 65, so that the pressure balance valve 65 is conducted to exhaust when the high pressure air flow is discharged from the inside, and remains airtight when the air pressure is normal.

In some embodiments, as shown in fig. 6, the high-voltage electrical terminal 315 and the low-voltage electrical terminal 316 are mounted on the front side wall 11 of the housing 1 and are disposed at intervals in the left-right direction from the second electrical portion 33, and the outer interface 102 is provided on the rear side wall 12 of the housing 1. In this way, the battery pack 100 and the external power communication position are located on the front and rear sides of the battery pack 100 with the side access ports 101, and do not interfere with each other. When mounted on the vehicle 1000, since the failure rate of the power-on communication portion is low, the front side is protected inside the vehicle body 200, and the failure rate thereof can be further reduced.

The second electrical portion 33 is disposed adjacent to and along the front sidewall 11. The high voltage electric terminal 315 of the electric module 3 may output high voltage electricity to the outside of the battery pack 100 to supply electric power; the low-voltage electrical terminal 316 of the electrical module 3 may output a low voltage power to the outside of the battery pack 100, transmitting a signal. The electrical connection structure 31 connects the second electrical portion 33, the high-voltage electrical terminal 316, and the high-voltage electrical terminal 315, and the mounting position is close to the front sidewall 11, so that the arrangement of the electrical connection structure 31 can be reduced, and the application cost of electrical connection can be reduced.

In some embodiments, as shown in fig. 3, the bottom plate of the housing 1 is a removable bottom shield 15 to enable removal of the second electrical portion 33 when the bottom shield 15 is removed. The second electrical part 33 may be mounted or dismounted to the housing 1, and the bottom plate of the housing 1 is a detachable bottom guard 15, so that the second electrical part 33 can be dismounted when the bottom guard 15 is dismounted. When it is necessary to repair the second electric part 33, the bottom cover 15 is detached from the battery pack 100, and the second electric part 33 is taken out.

Specifically, as shown in fig. 22 and 23, the battery pack 100 further includes: the liquid cooling plate 6, the liquid cooling plate 6 is located the below of group battery 2 and electric module 3, and end backplate 15 detachable connection is in liquid cooling plate 6 below, is equipped with the bottom access hole 61 that corresponds second electric portion 33 on the liquid cooling plate 6, and end backplate 15 covers bottom access hole 61.

The liquid cooling plate 6 is provided with a bottom access hole 61, the bottom access hole 61 is located at the bottom of the battery pack 100, and the position of the bottom access hole 61 corresponds to the second electric part 33, and the bottom protection plate 15 can cover the bottom access hole 61. The liquid cooling plate 6 can be used for cooling the battery pack 2 to make it in a safe temperature interval.

The bottom access hole 61 is formed in the liquid cooling plate 6, the disassembly of the second electric portion 33 is not affected, and the liquid cooling plate 6 can be connected with the bottom of the frame 10 at the peripheral edges, so that the overall structural strength is further improved.

When applied to the vehicle 1000, the bottom guard 15 acts as a floor for the vehicle 1000 on the one hand, and can bear the weight of the interior of the vehicle 1000; on the other hand, the bottom cover 15 protects the internal structure of the battery pack 100 and reduces damage.

Specifically, as shown in fig. 6, a liquid flow passage is provided in the liquid cooling plate 6 for circulating a cooling liquid. The liquid cooling plate 6 is provided with a liquid cooling pipe 601 for flowing in or out liquid, the end part of the liquid cooling pipe 601 is provided with a liquid cooling joint 602, and the liquid cooling joint 602 is used for being connected with an external water tank. Liquid-cooled joint 602 may be mounted to frame 10, for example, to front sidewall 11.

Further, as shown in fig. 22, a sealing ring 62 is required to be provided on the periphery of the bottom access opening 61 to improve the sealability of the bottom access opening 61 during use.

The bottom access opening 61 is relatively flexible, for example, in fig. 22, a sealing ring 62 is provided around the bottom access opening 61 on the liquid cooling plate 6. As also shown in fig. 37, the bottom shield 15 is provided with a gasket 62 disposed around the bottom access opening 61.

In yet another embodiment, as shown in fig. 22, the battery pack 100 further includes a bottom access cover 63 covering the bottom access opening 61, the bottom access cover 63 being removably attached to the liquid cooling plate 6, the bottom access cover 63 being positioned above the bottom guard plate 15. The bottom access cover 63 may protect the structure inside the battery pack 100 from dust, moisture, etc. entering the inside of the battery pack 100 through the bottom access opening 61.

Optionally, a sealing ring 62 disposed around the bottom access hole 61 is disposed on the bottom access cover 63, so as to further improve the sealing protection of the bottom access hole 61.

Further, as shown in fig. 37, the battery pack 100 includes fastening bolts 611 connecting the bottom protection plate 15 and the liquid cooling plate 6, and a plurality of fastening bolts 611 are distributed around the bottom access hole 61. By fastening the bolts 611, the bottom guard plate 15 and the liquid cooling plate 6 at the bottom access hole 61 can be fastened, and the connection reliability and the sealing property at the bottom access hole 61 can be improved.

In some embodiments, as shown in fig. 34 and 35, the liquid cooling plate 6 of the battery pack is provided with a bottom access hole 61 penetrating in the thickness direction, and a liquid flow channel 6-01 is provided in the liquid cooling plate 6. The upper surface of the liquid cooling plate 6 is provided with a liquid inlet 6-02 and a liquid outlet 6-03, and a bottom overhaul port 61 is positioned between the liquid inlet 6-02 and the liquid outlet 6-03.

Through setting up bottom access hole 61 on liquid cooling board 6, then the at least partial electric module 3 of battery package 100 can install in bottom access hole 61 top, opens bottom access hole 61 and just can operate when need maintenance, improves battery package 100 and overhauls the operation convenience. Through setting up inlet 6-02 and liquid outlet 6-03 near bottom access hole 61, inlet 6-02 and liquid outlet 6-03 top need connect liquid cold pipe 601, and bottom access hole 61 top need install at least partial electric module 3, and this space can compact overall arrangement, need not occupy other areas like this, and the group battery 20 can be arranged to the area that vacates on the liquid cooling board 6, has improved the space utilization of liquid cooling board 6 top area. And liquid inlet 6-02 and liquid outlet 6-03 are located bottom access hole 61 both ends, and the liquid cooling pipe 601 of its connection can be adjacent electric module 3 setting, borrow this liquid cooling pipe 601 can improve the radiating effect to electric module 3.

Specifically, one side of the liquid cooling plate 6 is the joint side 6-04, where the joint side 6-04 is named according to the position of the battery pack 100 where the liquid cooling joint 602 is connected, and one side of the liquid cooling plate 6 adjacent to the liquid cooling joint 602 is the joint side 6-04. The bottom access opening 61 extends along the joint edge 6-04, and the liquid inlet 6-02 and the liquid outlet 6-03 are both arranged adjacent to the joint edge 6-04. That is, the electric module 3 (e.g. the second electric part 33) above the bottom access hole 61 is disposed adjacent to the liquid cooling joint 602, so that the side of the housing 1 where the liquid cooling joint 602 is installed does not need to be disassembled, and the electric module 3 (e.g. the second electric part 33) only needs to be disassembled and maintained from the bottom, and is not in conflict with each other, so that the influence on the reliability of the liquid and the current during the conflict is avoided.

Specifically, the liquid inlets 6-02 are located at the middle position of the liquid cooling plate 6, two liquid outlets 6-03 are located at two opposite sides of the liquid inlet 6-02, and the liquid inlet 6-02 and one liquid outlet 6-03 are located at two ends of the bottom access hole 61 in the length direction. Thus, the cooling liquid enters from the middle and exits from the two sides, and heat in the middle position in the battery pack 100 is accumulated, so that the low-temperature liquid enters from the middle, the cooling effect on the middle position of the battery pack 100 is improved, and the overall temperature uniformity is improved.

In some embodiments, the separation assembly 5 comprises: the dividing beam 51, the dividing beam 51 extends in the left-right direction, the accommodating sub-chamber V10 includes a front sub-chamber V11 located at one side of the dividing beam 51, and the bottom access opening 61 is located in the front sub-chamber V11.

The liquid cooling plate 6 is provided with a plurality of first liquid cooling connecting holes 6-07, at least part of the first liquid cooling connecting holes 6-07 are opposite to the separation cross beam 51, and the liquid cooling plate 6 is fixedly connected to the separation cross beam 51 through at least part of the first liquid cooling connecting holes 6-07.

Specifically, a plurality of first liquid cooling avoidance holes 6-09 are formed in the liquid cooling plate 6, and the first liquid cooling avoidance holes 6-09 are arranged around the bottom access hole 61.

At least part of the first liquid cooling avoidance holes 6-09 are arranged opposite to the separation cross beam 51 on one side of the front sub-cavity V11, and the bottom guard plate 15 is detachably connected with the separation cross beam 51 through at least part of the first liquid cooling avoidance holes 6-09.

In some alternative embodiments, as shown in fig. 34, at least two rows of first liquid cooling connecting holes 6-07 are provided on the liquid cooling plate 6, wherein the two rows of first liquid cooling connecting holes 6-07 are located at two sides of the bottom access hole 61, each row of a plurality of first liquid cooling connecting holes 6-07 are arranged at intervals along the long side of the bottom access hole 61, and the first liquid cooling connecting holes 6-07 are used for fixedly connecting the liquid cooling plate 6 to the separation component 5 of the battery pack 100. This improves the reliability of the connection between the liquid cooling plate 6 and the upper frame 10, and particularly, the reliability and stability of the electric module 3 are improved at both sides of the part.

Of course, at least one row of second liquid cooling connecting holes 6-08 is also arranged on the liquid cooling plate 6 in the application, and is also used for fixedly connecting the liquid cooling plate 6 to the frame 10 of the battery pack 100.

Further, at least two rows of first liquid cooling avoidance holes 6-09 are formed in the liquid cooling plate 6, wherein the two rows of first liquid cooling avoidance holes 6-09 are located on two sides of the bottom access hole 61, each row of a plurality of first liquid cooling avoidance holes 6-09 are distributed at intervals along the long side of the bottom access hole 61, the diameter of each first liquid cooling avoidance hole 6-09 is larger than that of each first liquid cooling connection hole 6-07, and each first liquid cooling avoidance hole 6-09 is used for avoiding a fastener of the bottom protection plate 15 of the battery pack 100, which is connected to the frame 10. This facilitates attachment of the underlying bottom fender 15 or bottom access cover 63 to the frame 10. The two parts are connected in a non-conflicting way, and the probability of incorrect disassembly is reduced during disassembly and assembly.

Further, the liquid cooling plate 6 is provided with a plurality of first liquid cooling connecting holes 6-07 and a plurality of second liquid cooling connecting holes 6-08 which are fixedly connected to the separation assembly 5 and the frame 10, part of the first liquid cooling connecting holes 6-07 are arranged opposite to the separation cross beam 51 and part of the first liquid cooling connecting holes are arranged opposite to the separation longitudinal beam 52, and the second liquid cooling connecting holes 6-08 are arranged along the edge of the liquid cooling plate 6.

Further, a plurality of first liquid cooling avoidance holes 6-09 and a plurality of second liquid cooling avoidance holes 6-10 are formed in the liquid cooling plate 6, the plurality of first liquid cooling avoidance holes 6-09 are arranged around the bottom overhaul hole 61, the plurality of second liquid cooling avoidance holes 6-10 are arranged along the edge of the liquid cooling plate 6, and the bottom guard plate 15 is detachably connected to the upper side of the liquid cooling plate 6 through the first liquid cooling avoidance holes 6-09 and the second liquid cooling avoidance holes 6-10.

In some embodiments, as shown in FIG. 35, the flow channel 6-01 comprises: the flow dividing sub-channel 6-11, the flow dividing sub-channel 6-11 is positioned in the middle of the liquid cooling plate 6, and the liquid inlet 6-02 is connected with one end of the flow dividing sub-channel 6-11 adjacent to the joint edge 6-04; the two reflux sub-channels 6-12 are positioned on two opposite sides of the split sub-channel 6-11, the two reflux sub-channels 6-12 extend along two opposite sides of the liquid cooling plate 6, and the two liquid outlets 6-03 are connected with one ends of the two reflux sub-channels 6-12 adjacent to the joint edge 6-04; the heat dissipation sub-channels 6-13 are multiple, the two corresponding reflow sub-channels 6-12 are divided into two groups, each group of heat dissipation sub-channels 6-13 is connected between the corresponding reflow sub-channel 6-12 and the corresponding flow distribution sub-channel 6-11, and the multiple heat dissipation sub-channels 6-13 are arranged in one-to-one correspondence with the multiple battery groups 20 in the battery pack 100.

As the name suggests, the split sub-channels 6-11 are used for splitting the cooling liquid, and the cooling liquid flowing in from the liquid inlet 6-02 is dispersed to each heat dissipation sub-channel 6-13 through the split sub-channels 6-11. The cooling liquid in each heat dissipation sub-channel 6-13 flows back to the liquid outlet 6-03 from the back flow sub-channel 6-12.

Wherein, to enhance the cooling effect, the heat dissipation sub-channels 6-13 may be S-shaped or other shapes, and the heat dissipation sub-channels 6-13 have a plurality of bending sections to arrange the longer heat dissipation sub-channels 6-13 in a smaller area.

Further, the flow channel 6-01 further includes: the first extending sub-channel 6-14, the first extending sub-channel 6-14 is positioned at one side of the bottom access hole 61 far away from the liquid inlet 6-02, and is connected with an adjacent reflux sub-channel 6-12, and a liquid outlet 6-03 is arranged opposite to the first extending sub-channel 6-14; the second extending sub-channel 6-15, the second extending sub-channel 6-15 is connected with the other backflow sub-channel 6-12, the second extending sub-channel 6-15 is bent relative to the backflow sub-channel 6-12 and extends towards the liquid inlet 6-02, and the other liquid outlet 6-03 is arranged opposite to the end part of the second extending sub-channel 6-15 adjacent to the liquid inlet 6-02. Thus, the first extending sub-channel 6-14 and the second extending sub-channel 6-15 are utilized to flexibly set the position of the liquid outlet 6-03, so that the An Paiye of the cold pipe 601 is convenient, and the liquid cooling pipe 601 can cool the second electric module 33 and cannot be overlong from the liquid cooling joint 602.

Alternatively, as shown in fig. 34 and 35, the liquid cooling plate 6 includes: the upper liquid plate 6-05 and the lower liquid plate 6-06 are arranged in a stacked manner, the liquid flow channel 6-01 is formed by downwards deforming the lower liquid plate 6-06, the upper liquid plate 6-05 is used for sealing the liquid flow channel 6-01, and the liquid inlet 6-02 and the liquid outlet 6-03 are formed in the upper liquid plate 6-05. Wherein, the lower liquid plate 6-06 is provided with at least one welding through hole 6-061, and the welding point is arranged at the welding through hole 6-061. Therefore, welding spots are conveniently arranged along the edges of the welding through holes 6-061, so that the upper liquid plate 6-05 and the lower liquid plate 6-06 are combined more firmly.

Further alternatively, the welding through holes 6-061 are arranged adjacent to the liquid flow channels 6-01, the sides of the liquid flow channels 6-01 adjacent to the welding through holes 6-061 form avoidance arc-shaped edges 6-16, and the avoidance arc-shaped edges 6-16 are arranged around the welding through holes 6-061.

To connect the structure above the bottom shield 15.

Specifically, the upper surface of the bottom guard plate 15 is provided with a thickened rib 151 protruding upward, and the projection surface of the thickened rib 151 on the liquid cooling plate 6 completely covers the bottom access hole 61. After the bottom guard plate 15 is fixedly connected with the upper frame 10, the thickened convex ribs 151 are pressed upwards, so that the bottom access hole 61 is pressed, and the tightness is improved.

The bottom main board 150 is a structural body of the bottom guard board 15, and is used for being connected to the bottom of the battery pack 100, so as to play a role in protection and decoration. By providing the thickened convex ribs 151 on the upper surface of the bottom main plate 150, the thickened convex ribs 151 protrude upward with respect to the bottom main plate 150, and can be supported at the edge of the bottom access hole 61 of the battery pack 100. For example, when the battery pack 100 is provided with the liquid cooling plate 6 at the bottom, the liquid cooling plate 6 is provided with the bottom access hole 61 opposite to one electric part (the second electric part 33 is described above), and the thickened rib 151 can be just supported at the edge of the bottom access hole 61, so as to play a supporting role. And normally, a sealing structure is arranged at the edge of the bottom access hole 61, and the thickened convex ribs 151 can press the sealing structure to improve the sealing effect. Therefore, the bottom cover 15 of the present application can improve the sealing reliability around the bottom access hole 61, thereby improving the sealing protection of the electric module of the battery pack 100.

Optionally, the thickened convex rib 151 is a single part, the bottom main board 150 is a single part, and the thickened convex rib 151 is connected to the bottom main board 150 by welding or gluing, so that the thickened convex rib 151 and the bottom main board 150 are of an integral structure when the bottom guard board 15 is disassembled and assembled, and cannot shift, and the sealing effect between the thickened convex rib 151 and the bottom main board 150 is improved.

When the bottom guard plate 15 includes the sealing ring 62, the sealing ring 62 may be disposed on the upper surface of the thickened convex rib 151, and the sealing ring 62 extends along the inner edge of the thickened convex rib 151. The arrangement is convenient to position on one hand, and on the other hand, the sealing ring 62 is pressed upwards in the fastening process of the bottom guard plate 15, so that the edge tightness of the bottom overhaul hole 61 is ensured.

Further, the plurality of first bottom connecting holes 156 is provided, and the plurality of first bottom connecting holes 156 are arranged at intervals around the sealing ring 62. In this way, when the fasteners are connected to the first bottom connecting holes 156, the fasteners are fastened at the plurality of positions, so that the sealing ring 62 is tightly pressed at the plurality of positions around one circle, thereby further improving the sealing effect.

In some embodiments, one side of the thickened bead 151 is disposed flush with one side of the bottom motherboard 150. It will be appreciated that the edge connection is sealed when the backplate 15 is attached to the frame 10 of the housing 1. And one side of the thickened convex rib 151 is arranged flush with one side of the bottom main board 150, so that the upper side of one side of the thickened convex rib 151 faces one side of the frame 10, and the opposite electric part of the thickened convex rib is adjacent to the frame 10. On the one hand, the electric part can be supported and protected by the frame 10 with higher structural strength, and on the other hand, the structure is concentrated near the frame 10, so that the arrangement density of parts is improved. Further, when the one side of the thickened rib 151 is flush with the one side of the bottom main plate 150 from the outside, the connection laminated structure is observed from the outside, and whether or not a component is missing is detected.

In some embodiments, as shown in fig. 37, the bottom guard plate 15 further includes: the bottom edge strip 153, the bottom edge strip 153 is stacked above the bottom main board 150 and is arranged along the edge of the bottom main board 150, and a second bottom connecting hole 157 is arranged on the bottom edge strip 153, and the second bottom connecting hole 157 penetrates through the bottom main board 150 downwards. It is understood that when the battery pack 100 is impacted, corners of the battery pack 100 become the most impact and deformation locations. Therefore, the bottom edge strip 153 is arranged in the application, so that the protection and support effects on the edge of the bottom guard plate 15 can be improved, and the situation that the edge of the bottom guard plate 15 turns over and curls due to thinness during assembly and disassembly is reduced. In addition, when the second bottom connecting hole 157 is formed in the bottom edge strip 153, and the fastening member passes through the second bottom connecting hole 157 to connect the frame 10, the bottom edge strip 153 can reduce the probability of the fastening member leaking through the bottom guard plate 15, and improve the reliability of the fastening member connection at the second bottom connecting hole 157.

Specifically, the thickened convex rib 151 is located at one side of the bottom main board 150, the bottom edge 153 is in a ring shape consistent with the edge shape of the bottom main board 150, and the bottom edge 153 is provided with a avoidance notch 1531 corresponding to the thickened convex rib 151. This is advantageous in keeping the bottom edge 153 flat, avoiding excessively complex shapes, and reducing sealing difficulty.

Optionally, the height h3 of the bottom edge strip 153 is greater than the height h4 of the thickened bead 151. That is, the upper surface of the bottom edge strip 153 is higher than the upper surface of the thickened bead 151. So set up, when connecting bottom protecting cover 15 to casing 1 bottom, this difference in height can form a space, conveniently sets up seal structure. For example, when the bottom access cover 63 is disposed above the thickened bead 151, the gap can accommodate the bottom access cover 63. Or when the sealing ring 62 is arranged, a thicker sealing ring 62 can be arranged, so that a certain selection space is provided for the sealing structure.

In some alternative embodiments, the upper surface of the bottom guard plate 15 may be provided with a shock absorbing layer 18, as shown at 28, to improve the buffer protection of the internal battery pack 2 and the electrical module 3.

In some embodiments, as shown in fig. 13 and 6, a fixing plate 67 is provided in the housing 1, the fixing plate 67 being located above the second electrical portion 33. The second electric part 33 is detachably connected to the fixing plate 67 by means of a fourth bolt 3294, the head of the fourth bolt 3294 being located at the lower end, i.e. the mounting direction of the fourth bolt 3294 is directed away from the fixing plate 67 towards the bottom access opening 61. The projection of the fourth bolt 3294 on the liquid cooling plate 6 is located in the bottom access hole 61, whereby the fourth bolt 3294 can be detached or attached through the bottom access hole 61, improving the convenience of detachment or attachment.

As shown in fig. 23-24, in some embodiments, the second electrical portion 33 includes a second electrical housing 332 for housing electrical components. Specifically, the second electrical portion 33 further includes a first extension plate 3351, the first extension plate 3351 is connected to at least one side of the second electrical housing 332, and a mating groove is disposed on the first extension plate 3351 and penetrates through the mating groove on a side far from the second electrical housing 332. The battery pack 100 further includes a shock-absorbing column 333, and the shock-absorbing column 333 is vertically disposed.

As shown in fig. 26, the shock strut 333 includes two thick strut sections 3331 and a thin strut section 3332 located between the two thick strut sections 3331. As shown in fig. 24 and 25, the thin column section 3332 is fitted in the fitting groove, 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 central hole 3333, and the fourth bolt 3294 penetrates through the central hole 3333 and is connected with the fixing plate 67. By arranging the shock-absorbing columns 333, on one hand, the fixing plate 67 can be connected, and the connection reliability is improved; on the other hand, the vibration of the second electric portion 33 is absorbed to protect the electric components housed inside the second electric housing 332.

For easy disassembly, the electrical connection structure 31 is electrically connected to the second electrical portion 33 by a flexible harness. For example, the connector of the second electrical portion 33 for communication is a first signal transmission interface 339, and the second signal transmission interface 3121 is connected to the second wire harness 312 of the electrical connection structure 31, and the two connectors are connected in a plugging manner.

As shown in fig. 23, the first signal transmission interface 339 is located at the bottom of the second electric housing 332, so that when the bottom access hole 61 is opened, the interface state can be very conveniently observed. Specifically, the second signal transmission interface 36 is plugged with the first signal transmission interface 339 from the side, so that the gravity of the wire can be carried by the interface while the second signal transmission interface 36 is conveniently plugged and pulled manually, and shaking is reduced.

Specifically, the first signal transmission interface 339 is connected to the interior of the second electrical housing 332 by a plurality of fourth flexible wires 331, whereby the second electrical portion 33 is connectable to the electrical connection structure 32 via the first transmission interface 319.

In some embodiments, as shown in fig. 25, the second electrical enclosure 332 of the second electrical portion 33 is removably connected within the housing 1. The second electrical portion 33 includes a main relay 337, a power strip 338, and a first transmission interface 319. The main relay 337 is disposed in the electrical housing 1, one end of the power receiving strip 338 is connected to the main relay 337, and the other end of the power receiving strip 338 is located outside the second electrical housing 332. The power connection bar 338 is used for connecting high-voltage power, and the main relay 337 can control the high-voltage power.

Specifically, the electrical connection structure 32 includes a copper bar 317 and a second transmission interface 37, and one end of the copper bar 317 is connected to the other end of the electrical connection bar 338 through a fifth bolt 3295. The second signal transmission interface 36 is connected to the first signal transmission interface 339 in a plug-in manner, whereby an electrical connection of the second electrical part 33 to the electrical connection 32 is achieved.

Illustratively, the copper bar 317 is elongated, and the copper bar 317 has a certain toughness and is bendable. The connection between the copper bar 317 and the grounding bar 338 has an insulating cover that is attached to the second electrical enclosure 332. When the second electrical portion 33 needs to be removed, the second electrical portion 33 is first powered off, the insulating cover is removed, the fixing structure of the copper bar 317 and the power connection bar 338 is released, and then the fifth bolt 3295 may be loosened. Fourth bolt 3294 may be loosened by pulling second transmission interface 37 out exposing fourth bolt 3294.

As shown in fig. 27, in some embodiments, the second electrical portion 33 further includes a second extension board 3352 connected to the second electrical housing 332, two first signal transmission interfaces 339 are provided on opposite sides of the second extension board 3352, two first signal transmission interfaces 36 are provided on opposite sides of the second extension board 1352, and a mating groove matched with the mating hook 33521 is provided on each first signal transmission interface 339, so that the first signal transmission interface 339 can be fixed on the second electrical housing 332, and the connection cost can be reduced and the connection reliability can be improved through a snap connection mode.

As shown in fig. 25, in some embodiments, two main relays 337 are disposed at intervals, a lower protrusion 336 protruding downward is formed at the bottom of the second electrical housing 332, the two lower protrusions 336 are respectively covered under the two main relays 337, second through holes 3361 are respectively disposed adjacent to the two lower protrusions 336 at the bottom of the second electrical housing 332, and a part of the fourth flexible conductive wire 331 extends into the second electrical housing 332 through one second through hole 3361 and a part extends into the second electrical housing 332 through the other second through hole 3361. In this way, the second electrical housing 332 can be used to define the location of the fourth flexible conductive line 331, so as to reduce the probability of interference with other parts and reduce adverse effects on signals.

Optionally, as illustrated in fig. 25 and 27, a wire fastener 3362 for limiting the fourth flexible conductive wire 331 is provided on a side of the at least one lower protrusion 336. Thus, the movement of the wire catch 3362 can be restricted, and the swing of the wire catch 3362 can be reduced.

In some embodiments, as shown in fig. 28 to 29, the top cover 16 includes a cover body 161 and seat fixing fasteners 66, at least two first assembly holes are provided in the cover body 161 in the same row, the first assembly holes are located in a middle region of the cover body 161, the seat fixing fasteners 66 are provided at the first assembly holes in one-to-one correspondence, lower ends of the seat fixing fasteners 66 are located in the frame 10 to be fixed, and upper ends of the seat fixing fasteners 66 are used to connect the seat 300. That is, the seat attachment fasteners 66 are disposed within the frame 10 and may be directly or indirectly coupled to the frame 10. And the seat 300 may be coupled to the seat attachment fasteners 66 by fasteners. When the seat 300 is subjected to a force, the force is transmitted to the entire battery pack 100, and the impact force is dispersed by the entire battery pack 100.

By such design, the battery pack 100 can be integrated with the vehicle body 200 after being mounted on the vehicle body 200, and the damage degree of the impact force after being dispersed can be reduced after the external impact received by the vehicle body 200 is dispersed to each position. And the battery pack 100 can be used as a part of the chassis of the vehicle body 200, so that the weight of the remaining chassis of the vehicle body 200 can be greatly reduced. Also, the roof 16 may serve as part of the floor of the passenger compartment 220, so that the weight of the remaining floor of the vehicle body 200 can be greatly reduced. But also can reduce the number of parts and assembly procedures.

In some embodiments, as shown in fig. 28 and 29, the seat fixing fastener 66 is provided with a seat fixing screw hole 661 extending downward from the upper end. So that the seat 300 can be attached to the seat attachment fasteners 66 by threaded fasteners. For example, the bottom of the seat 300 is provided with a seat bottom beam, the seat bottom beam is provided with a through hole, and bolts penetrate through the through hole from top to bottom and are connected in the seat fixing threaded holes 661. The design can ensure that the battery pack 100 is firmly and reliably connected with the seat 300 and can be detachably assembled.

Alternatively, the seat fixing screw holes 661 penetrate the seat fixing fastener 66 in the up-down direction, thereby reducing the processing difficulty. Of course, it is not excluded that the bottom of the seat fixing screw hole 661 is not penetrated, and it is a blind hole.

Further, as shown in fig. 28, a rotary table 662 surrounding the seat fixing screw hole 661 is provided at the upper end of the seat fixing fastener 66, and the rotary table 662 is annular.

Optionally, the inner contour of the rotating platform 662 is polygonal, so that a tool (such as a screwdriver, an electric wrench, etc.) can be conveniently matched into the rotating platform 662 to drive the seat fixing fastener 66 to rotate and assemble, thereby improving the assembling efficiency of the rotating platform 662.

Optionally, the outer contour of the rotating platform 662 is polygonal, so that a tool (such as a wrench, an electric wrench, etc.) can be conveniently matched to the rotating platform 662 to drive the seat fixing fastener 66 to rotate and assemble, thereby improving the assembling efficiency of the rotating platform 662. In some versions, after the seat 300 is installed on the battery pack 100, a tool may be fitted from the bottom of the seat 300 to the swivel stage 662 and used to tighten or loosen the seat securing fasteners 66.

Specifically, the seat securing fastener 66 further includes a support boss 663, the support boss 663 being located below the swivel stage 662. The support boss 663 is provided as a washer integrally formed with the seat fixing fastener 66, which increases the contact area between the head of the seat fixing fastener 66 and the top cover 16, and also equalizes the pressure applied to the top cover 16 in the circumferential direction during rotation of the seat fixing fastener 66, thereby reducing the occurrence of stress concentration around the first fitting hole of the top cover 16 to tear. Further, the outer contour of the turntable 662 is hexagonal, and the diameter of the circumcircle is smaller than the diameter of the supporting circular table 663, so that when the tool is matched with the outer contour of the turntable 662, the supporting circular table 663 can space the tool from the top cover 16, and the abrasion of the top cover 16 by the tool is reduced.

Further alternatively, the outer peripheral surface of the seat fixing fastener 66 is provided with external threads, and is coupled inside the frame 10 by means of the external threads, thus improving the assembly efficiency.

In some embodiments, as shown in fig. 29, the cover body 161 is at least two layers, including a hard plate layer 161a and an insulatable buffer layer 161b. Wherein the stiff plate layer 161a is used to ensure the overall rigidity of the top cover 16, and the buffer layer 161b may realize buffer protection. Moreover, the use of the buffer layer 161b is very convenient in performing the sealing connection, and the use of the insulating material for the buffer layer 161b can improve the internal and external protection of the battery pack 100. Optionally, the hard plate layer 161a is a steel plate layer or other metal layer. Alternatively, the buffer layer 161b is a plastic layer, a composite plastic layer, a rubber layer, or the like, which is not limited herein.

In some embodiments, as shown in fig. 30-33, the frame 10 is sequentially connected in the length direction by a plurality of frame side beams 10-1, and finally forms a ring-shaped frame, which is called a frame 10. Specifically, the front side wall 11 is composed of at least one frame side rail 10-1, the rear side wall 12 is composed of at least one frame side rail 10-1, the left side wall 13 is composed of at least one frame side rail 10-1, and the right side wall 14 is composed of at least one frame side rail 10-1. Each frame side beam 10-1 comprises at least two frame body parts 10-10 distributed along the height direction, and a closed frame body type cavity 10-40 is formed in each frame body part 10-10. Each frame side rail 10-1 may include two frame portions 10-10, which are stacked one on another in the height direction. In some embodiments, as shown in fig. 30, two adjacent frame portions 10-10 are connected by a connecting rib 10-6. Alternatively, the two frame parts 10-10 and the connecting ribs 10-6 are integrally formed by rolling steel plates, or the two frame parts 10-10 and the connecting ribs 10-6 are integrally formed aluminum extruded profiles.

Wherein, each frame boundary beam 10-1 is formed by integral rolling of steel plates, or the frame boundary beam 10-1 is an integral aluminum extrusion profile. So that all the frame parts 10-10 of each frame side rail 10-1, or all the frame parts 10-10 and all the connecting ribs 10-6 are continuous, and each side of the frame parts 10-10 is roll-pressed or extrusion-formed, not by stretching a common profile. On the one hand, welding between the sides of the same frame body 10-10 can be reduced, and welding between two adjacent frame body parts can be reduced, so that the processing procedure is reduced. In addition, two adjacent frame body parts not only have the position relation of splicing and superposition, but also are pulled by the connecting edges, so that the integrity is stronger, and the overall structural strength can be greatly improved.

Specifically, the connection rib 10-6 connected between the two frame body parts 10-10, in some embodiments, a high voltage electric terminal 315 and a low voltage electric terminal 316 are installed on the connection rib 10-6 of the front side wall 11, and a side access hole 101 is provided on the connection rib 10-6 of the rear side wall 12. Further, as shown in fig. 31, the mounting beam 17 is integrally roll-formed from a steel plate, or an extruded aluminum profile in which the mounting beam 17 is integrally formed. Optionally, the mounting beam 17 includes at least one mounting portion 17-10, and the mounting portion 17-10 includes a mounting cavity 17-40 penetrating along a length direction thereof to absorb most of external force energy, thereby reducing structural vibration, improving structural safety, and reducing noise.

In some embodiments, as shown in fig. 3 and 14, in particular, the partition assembly 5 includes at least one partition beam 50, the partition beam 50 includes at least two partition portions 50-10 disposed in a height direction, and a partition cavity 50-40 is formed in the partition portion 50-10, and the partition cavity 50-40 is disposed to extend in a length direction of the partition beam 50.

Specifically, each of the partitions 50-10 is formed by integrally rolling a steel plate, or is an integrally formed aluminum extruded profile. Each side of the separator 50-10 is roll-formed or extrusion-formed, not by stretching from a conventional profile. In this way, on the one hand, welding between the sides of the same partition 50-10 can be reduced, and welding between two adjacent frame parts can be reduced, thereby reducing the processing steps. In addition, two adjacent frame body parts not only have the position relation of splicing and superposition, but also are pulled by the connecting edges, so that the integrity is stronger, and the overall structural strength can be greatly improved.

In some embodiments, the plurality of separation beams 50 of the separation assembly 5 includes: at least two dividing beams 51, adjacent two dividing beams 51 are spaced apart in the front-rear direction, and the battery pack 2 of the battery pack 100 is located between the foremost dividing beam 51 and the rearmost dividing beam 51. The accommodating subchamber V10 includes at least one of a front subchamber V11 and a rear subchamber V12.

The electric module 3 for mounting the battery pack 100 when including the front sub-chamber V11, the front sub-chamber V11 is defined between the foremost partition rail 51 and the front side wall 11. When included, the rear subchamber V12 is defined between the last dividing cross member 51 and the rear side wall 12 for mounting the electrical module 3 of the battery pack 100. That is, the electric control part may be integrated and disposed in the front chamber V11 or the rear sub-chamber V12. The electric control part can be divided into two parts and respectively arranged in the front cavity V11 or the rear cavity V12.

In some embodiments, the partitions 50-10 are rectangular tubes, which facilitate stacking and reduce interference with the battery pack 2.

Specifically, two partition portions 50-10 provided in a highly laminated manner on the partition cross member 51. The two partitions 50-10 are connected by welding, or the two partitions 50-10 are fixedly connected by bolts. Or the two partition parts 50-10 are integrally roll-formed of steel plates, or integrally formed extruded aluminum profiles.

In some embodiments, the separation assembly 5 further comprises: a partition longitudinal beam 52 is connected to the middle of each adjacent two of the partition cross beams 51 to partition the space between the adjacent two of the partition cross beams 51 into two accommodating sub-chambers V10.

In some embodiments, the at least one dividing beam 51 comprises: the lower beam 511 and the upper beam 512, the lower beam 511 extends along the left-right direction, and two ends of the lower beam 511 are respectively connected with the left side wall 13 and the right side wall 14. The upper beam 512 extends in the left-right direction, the upper beam 512 is fixedly connected above the lower beam 511, and the lower beam 511 is connected with at least two spaced upper beams 512.

On the same separation beam 51, a first gap 5131 is defined between the left upper beam 512 and the left side wall 13, a second gap 5132 is defined between the right upper beam 512 and the right side wall 14, a third gap 5133 is defined between two adjacent upper beams 512, and a third gap 5133 is correspondingly arranged at the joint of the separation longitudinal beam 52 and the separation beam 51.

In some embodiments, as shown in fig. 30, the upper beam 512 includes at least one partition 50-10 disposed in a height direction, and the upper beam 512 is formed by rolling the same steel plate or is an integrally formed extruded aluminum profile. As shown in fig. 30, the lower beam 511 includes at least one partition 50-10 provided in the height direction, and the lower beam 511 is formed by rolling the same steel plate or is an integrally formed extruded aluminum profile.

In some embodiments, the ends of the dividing stringers 52 are welded to the lower cross member 511 so as not to interfere with the notch arrangement, ensuring that the weld line is long enough to improve weld reliability. The end of the dividing beam 51 is welded to the frame side beam 10-1 by the strap 54.

Specifically, the battery packs 20 are spaced apart from the partition stringers 52 such that the battery packs 20 form a flow path on the side facing the partition stringers 52, facilitating air flow therethrough and high temperature air flow discharge.

In some embodiments, each battery pack 20 has a first bus bar 203, the first bus bar 203 of the left battery pack 2 extends into the front subchamber V11 or the rear subchamber V12 via an adjacent first notch 5131, and the first bus bar 203 of the right battery pack 2 extends into the front subchamber V11 or the rear subchamber V12 via an adjacent second notch 5132. In this way, the position of the first busbar 203 is clear and orderly, on the one hand, the temperature can be reduced by the air flow flowing through the first busbar, and on the other hand, the first busbar is not in the middle position of the battery pack 100, so that the interference to the wire harness is reduced, and as shown in fig. 7, the whole electric connection structure 31 is orderly and orderly.

Specifically, as shown in fig. 2, the battery pack 2 is further provided with second bus bars 204 adjacent to the first electric portion 32, and the two second bus bars 204 are used in series with the fuse 3212 for voltage step-down protection at high voltage by the fuse 3212. Specifically, the second bus bar 204 is located in the rear subchamber V12 and on the front side of the first BDU module 321.

Optionally, as shown in fig. 3, at least one of the partition beams 51 is provided with a first hanging hole 514 corresponding to the first busbar 203. In this way, the first hanging hole 514 can be used to hang the first busbar 203 and the connecting structure, so as to improve the structural reliability and stability of the connecting position. A second hanging hole 515 is provided in the last partition beam 51 corresponding to the second bus bar 204.

In some embodiments, the electrical connection structure 31 includes: the first wire harness 311 is located in the rear sub-chamber V12 and disposed around the first electrical portion 32, the first wire harness 311 is electrically connected with the first bus bar 203 of the adjacent battery pack 2, and the first wire harness 311 is detachably electrically connected with the first electrical portion 32. The second harness 312, the second harness 312 is located in the front sub-chamber V11, the second harness 312 is detachably and electrically connected with the second electric portion 33, and the second harness 312 is electrically connected with the first busbar 203 of the adjacent battery pack 2. A third wire harness 313, the third wire harness 313 being connected between the first wire harness 311 and the second wire harness 312, the third wire harness 313 being placed above the partition stringers 52 and passing through the partition beams 51.

The last dividing beam 51 is clamped with a plurality of first clamping pieces 361, and the first clamping pieces 361 are sleeved on the first wire harness 311. The foremost dividing beam 51 is clamped with a plurality of second clamping pieces 362, and the second clamping pieces 362 are sleeved on the second wire harness 312. The partition longitudinal beam 52 is clamped with a plurality of third fastening pieces 363, and the third fastening pieces 363 are sleeved on the third wire bundle 313.

Specifically, the dividing longitudinal beam 52 is lower than the dividing transverse beam 51, so that when the second wire harness 312 passes through the dividing transverse beam 51 via the dividing longitudinal beam 52, certain restraint can be performed by the dividing transverse beam 51, and interference between the second wire harness 312 and the second protecting cover 15 due to excessive height is avoided. Optionally, the partition stringers 52 are arranged flush with the lower cross-beam 511.

In some embodiments, the rear side wall 12 includes a middle section 121 and side sections 122 connected to both sides of the middle section 121, the middle section 121 is disposed to protrude rearward with respect to the side sections 122, the side access opening 101 is located on the middle section 121, the side sections 122 are provided with the air pressure balance valve 65, and the first mounting beam 171 is connected to the middle section 121 outside the housing 1. Outside the housing 1, second mounting beams 172 are attached to the left side wall 13 and the right side wall 14, respectively.

In some embodiments, as shown in fig. 33, the battery pack 100 further includes an insulating cover 81 for covering the partition assembly 5 to separate the partition assembly 5 and the battery pack 2. Specifically, a portion of the insulating cover 81 is attached to the left and right side walls 11, 12 to separate the left and right side walls 11, 12 from the battery pack 2.

The vehicle 1000 according to the embodiment of the invention, as shown in fig. 38, includes: the vehicle body 200 and the battery pack 100 of the above embodiment, the structure of the battery pack 100 is not described again. As shown in fig. 39, a passenger space 220 is formed in the vehicle body 200, and the battery pack 100 is mounted on the bottom of the vehicle body 200. By adopting the 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 the weight can be reduced. Specifically, the battery pack 100 is mounted to the bottom of the vehicle body 200. The bottom of the vehicle body 200 is also formed with an upwardly concave upper concave cavity 240, and the rear end of the battery pack 100 is disposed opposite to the upper concave cavity 240. Thus, during maintenance, the first electrical part 32 in the side maintenance hole 101 can be maintained from the upper concave cavity 240 below, the whole vehicle does not need to be disassembled, and the loss to the vehicle is small. Other components and operations of the vehicle 1000 according to the embodiment of the present invention are known to those of ordinary skill in the art, and will not be described in detail herein.

In the description of the present specification, reference to the terms "embodiment," "example," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: numerous variations, changes, substitutions and alterations are possible to those 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, comprising:

the frame is used for enclosing the accommodating cavity;

The separation component is arranged in the frame to separate the accommodating cavity into a plurality of accommodating sub-cavities;

the liquid cooling plate is positioned at the bottom of the frame, the liquid cooling plate is provided with a bottom access hole opposite to one accommodating sub-cavity, and the liquid cooling plate is fixedly connected with the frame and the separation assembly at least adjacent to the bottom access hole;

the bottom guard board is detachably connected below the liquid cooling plate and used for opening and closing the bottom access hole.

2. The battery pack of claim 1, wherein the separator assembly comprises: the separation cross beam extends along the left-right direction, the accommodating sub-cavity comprises a front sub-cavity positioned at one side of the separation cross beam, and the bottom access hole is positioned in the front sub-cavity;

The liquid cooling plate is provided with a plurality of first liquid cooling connecting holes, at least part of the first liquid cooling connecting holes are opposite to the separation cross beam, and the liquid cooling plate is fixedly connected to the separation cross beam through at least part of the first liquid cooling connecting holes.

3. The battery pack according to claim 2, wherein the liquid cooling plate is provided with a plurality of first liquid cooling avoidance holes, and the first liquid cooling avoidance holes are arranged around the bottom access hole;

At least part of the first liquid cooling avoidance holes are arranged opposite to the separation cross beam on one side of the front sub-cavity, and the bottom guard plate is detachably connected with the separation cross beam through at least part of the first liquid cooling avoidance holes.

4. The battery pack of claim 1, wherein the frame comprises a front sidewall;

The partition assembly includes: the device comprises a separation longitudinal beam and at least two separation cross beams, wherein each separation cross beam extends along the left-right direction, two adjacent separation cross beams are distributed at intervals along the front-rear direction, the separation longitudinal beam extends along the front-rear direction, and the middle of each two adjacent separation cross beams is connected with one separation longitudinal beam so as to separate the space between the two adjacent separation cross beams into two accommodating sub-cavities;

The forefront separation cross beam and the front side wall define a front sub-cavity therebetween, and the bottom access opening, the liquid inlet and the liquid outlet of the liquid cooling plate are all positioned in the front sub-cavity.

5. The battery pack of claim 4, wherein the liquid cooling plate is provided with a plurality of first liquid cooling connecting holes and a plurality of second liquid cooling connecting holes so as to be fixedly connected to the separation assembly and the frame, a part of the plurality of first liquid cooling connecting holes are arranged opposite to the separation cross beam and a part of the plurality of first liquid cooling connecting holes are arranged opposite to the separation longitudinal beam, and a plurality of second liquid cooling connecting holes are arranged along the edge of the liquid cooling plate.

6. The battery pack according to claim 5, wherein the liquid cooling plate is provided with a plurality of first liquid cooling avoidance holes and a plurality of second liquid cooling avoidance holes, the plurality of first liquid cooling avoidance holes are arranged around the bottom overhaul hole, the plurality of second liquid cooling avoidance holes are arranged along the edge of the liquid cooling plate, and the bottom protection plate is detachably connected to the upper side of the liquid cooling plate through the first liquid cooling avoidance holes and the second liquid cooling avoidance holes.

7. The battery pack of claim 3, wherein the flow channel comprises:

The two flow dividing sub-channels are positioned at two sides of the separation longitudinal beam, and one ends of the two flow dividing sub-channels are positioned in the front cavity to be connected with the liquid inlet of the liquid flow channel;

The heat dissipation sub-channels are multiple and are positioned on two sides of the separation longitudinal beam, each heat dissipation sub-channel is connected with the adjacent split sub-channel and corresponds to one accommodating sub-cavity.

8. The battery pack of claim 7, wherein the flow channel further comprises:

The two backflow sub-channels are arranged on two sides of the separation longitudinal beam, and one end of each backflow sub-channel, which is positioned in the front sub-cavity, is connected with a liquid outlet of the liquid flow channel.

9. The battery pack of claim 8, wherein the frame comprises a left side wall and a right side wall, and wherein the battery pack of the battery pack comprises a plurality of battery groupings distributed within the receiving subchamber between the two dividing beams;

the left side of the battery grouping is spaced from the left side wall and forms a flow channel, and the right side of the battery grouping is spaced from the right side wall and forms another flow channel;

the two return sub-channels are located directly below the two flow channels.

10. The battery pack of any one of claims 1-9, wherein a front sidewall of the frame is adjacent the bottom access opening;

The battery pack further includes: a high-voltage electrical terminal, a low-voltage electrical terminal, the high-voltage electrical terminal and the low-voltage electrical terminal being mounted on the front side wall;

the battery pack further includes: the liquid cooling joints are connected with the liquid inlet of the liquid cooling plate and the liquid outlet of the liquid cooling plate through liquid cooling pipes, and the liquid cooling joints are arranged on the front side wall.

11. The battery pack of any one of claims 1-9, wherein the frame includes a rear sidewall, the frame defining a rear subchamber therein between the partition assembly and the rear sidewall;

The electric module of the battery pack comprises a first electric part and a second electric part, wherein the first electric part is installed in the rear sub-cavity, the second electric part is located above the bottom access hole, and a side access hole is formed in the rear side wall, opposite to the first electric part, of the battery pack.

12. A vehicle, characterized by comprising: the battery pack of any one of claims 1-11.