Battery pack shell and battery pack

Abstract

The invention discloses a battery pack shell. The battery pack shell comprises an upper shell and a lower shell, the upper shell is provided with an upper mounting space, the lower shell is provided with a lower mounting space, the upper shell and the lower shell are oppositely buckled, and the upper mounting space and the lower mounting space are enclosed to form a closed space; the depth of the upper mounting space and the depth of the lower mounting space are both smaller than the height of the battery module placed in the closed space, in addition, the upper shell is divided into a first upper shell and a second upper shell, and the lower shell is divided into a first lower shell and a second lower shell. The invention also comprises a battery pack which comprises a battery module and the battery pack shell, the battery module is arranged in the battery pack shell; the problems that a battery module is inconvenient to mount, low in mounting precision, inconvenient to overhaul, maintain, store and carry and the like are solved.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a battery pack shell and a battery pack. Background Art

[0002] As a carrier for storing electric energy, battery packs are widely used in multiple industries. The battery pack shell, as an important component of the battery pack, is mainly used to place and protect the battery module. The existing battery pack shell usually includes a lower shell and a top cover. The lower shell is provided with an installation space for placing the battery module. The depth of the installation space is at least greater than or equal to the height of the battery module. During installation, the battery module is first installed in the installation space of the lower shell and then closed by the top cover.

[0003] Thus, the installation space for accommodating the battery module is entirely arranged in the lower shell. When the battery module is placed in the installation space, the side wall of the lower shell will block and interfere with the placement of the battery module. Summary of the invention

[0004] In order to overcome at least one of the defects of the prior art described above, the present invention provides a battery pack housing and a battery pack to solve the problems of inconvenient installation of battery modules, low installation accuracy, inconvenient inspection and maintenance, and inconvenient storage and transportation.

[0005] The technical solution adopted by the present invention to solve the problem is:

[0006] A battery pack shell, comprising an upper shell and a lower shell;

[0007] The upper shell is provided with an upper installation space, and the lower shell is provided with a lower installation space. The upper shell and the lower shell are relatively buckled, and the upper installation space and the lower installation space are enclosed to form a closed space;

[0008] The depths of the upper installation space and the lower installation space are both less than the height of the battery module placed in the closed space.

[0009] Further, the upper shell includes a first upper shell and a second upper shell;

[0010] The first upper shell includes a first upper space, the second upper shell includes a second upper space, the first upper shell and the second upper shell are relatively buckled, and the first upper space and the second upper space are combined to form the upper installation space;

[0011] And / or, the lower shell includes a first lower shell and a second lower shell;

[0012] The first lower shell includes a first lower space, the second lower shell includes a second lower space, the first lower shell and the second lower shell are relatively buckled, and the first lower space and the second lower space are combined to form the lower installation space.

[0013] Further, taking the midline of the length direction of the upper shell as a reference, the first upper shell and the second upper shell are symmetrically arranged about the midline of the length direction of the upper shell;

[0014] And / or, taking the midline of the length direction of the lower shell as a reference, the first lower shell and the second lower shell are symmetrically arranged with respect to the midline of the length direction of the lower shell.

[0015] Further, the edge of the first upper shell for buckling with the second upper shell is provided with a first upper flange, and the edge of the second upper shell for buckling with the first upper shell is provided with a second upper flange;

[0016] A plurality of first upper fixing holes are arranged along the length direction of the first upper flange, and a plurality of second upper fixing holes are arranged along the length direction of the second upper flange, the plurality of first upper fixing holes and the plurality of second upper fixing holes correspond to each other one by one to form a first fixing channel, and an upper fixing member is arranged in the first fixing channel to lock and connect the first upper flange and the second upper flange;

[0017] And / or, the edge of the first lower shell for buckling with the second lower shell is provided with a first lower flange, and the edge of the second lower shell for buckling with the first lower shell is provided with a second lower flange;

[0018] A plurality of first lower fixing holes are arranged along the length direction of the first lower flange, and a plurality of second lower fixing holes are arranged along the length direction of the second lower flange. The plurality of first lower fixing holes and the plurality of second lower fixing holes correspond one-to-one to form a second fixing channel, and a lower fixing member is arranged in the second fixing channel to lock and connect the first lower flange and the second lower flange.

[0019] Furthermore, the upper shell includes a quadrilateral upper top plate, two upper side plates and two upper end plates.

[0020] The two upper side plates are arranged one by one on two opposite sides of the quadrilateral upper top plate, and the two upper end plates are arranged one by one on the other two opposite sides of the quadrilateral upper top plate;

[0021] The lower shell includes a quadrilateral lower bottom plate, two lower side plates and two lower end plates.

[0022] The two lower side plates are arranged on two opposite sides of the quadrilateral lower bottom plate in a one-to-one correspondence, and the two lower end plates are arranged on the other two opposite sides of the quadrilateral lower bottom plate in a one-to-one correspondence.

[0023] Further, upper fixing columns are provided on the four outer corners of the quadrilateral upper top plate, and the upper fixing columns are provided with upper locking holes, and lower fixing columns are provided on the four outer corners of the quadrilateral lower bottom plate, and the lower fixing columns are provided with lower locking holes;

[0024] When the upper shell and the lower shell are relatively buckled, the four upper locking holes and the four lower locking holes are aligned one by one to form a locking channel, so that the upper shell and the lower shell are locked and closed by a locking member arranged in the locking channel.

[0025] Further, the upper side plate and the lower side plate that are buckled together are integrally formed to form a side plate, and the upper end plate and the lower end plate that are buckled together are integrally formed to form an end plate;

[0026] The upper fixed column and the lower fixed column that are interlocked with each other form a group of connecting columns, and a accommodating space is formed between two adjacent groups of connecting columns. Four connecting columns form four accommodating spaces, and the two side plates and the two end plates are arranged in the four accommodating spaces in a one-to-one correspondence.

[0027] Furthermore, the side plate is provided with heat dissipation holes;

[0028] in,

[0029] The heat dissipation holes are small-diameter holes, the number of the small-diameter holes is multiple, and the multiple small-diameter holes are arranged in sequence;

[0030] Alternatively, the heat dissipation hole is a large-diameter hole, and a plurality of baffle bars are arranged in the large-diameter hole.

[0031] Furthermore, the quadrilateral upper top plate is provided with upper reinforcing ribs, and a plurality of the upper reinforcing ribs are arranged in an arranged manner or cross-arranged with each other;

[0032] And / or, a plurality of lower reinforcing ribs are arranged on the quadrilateral lower bottom plate, and the plurality of lower reinforcing ribs are arranged in an arranged manner or cross-arranged with each other.

[0033] Further, in the height direction of the battery pack shell, the upper shell and the lower shell are symmetrically arranged with a plane perpendicular to the height direction of the battery pack shell and passing through the midpoint of the height direction of the battery pack shell as a reference plane.

[0034] A battery pack, comprising a battery module and the battery pack housing as described above;

[0035] The battery module is disposed in the battery pack housing.

[0036] In summary, the battery pack housing and battery pack provided by the present invention have the following technical effects:

[0037] The depths of the upper installation space and the lower installation space corresponding to the upper shell and the lower shell are both smaller than the height of the battery module. In normal installation steps, the battery module will be installed downward into the lower installation space. At this time, the side wall of the lower shell will not block the upper part of the side of the battery module. Therefore, the installation of the battery module can be adjusted by grabbing the upper part of the side of the battery module, thereby improving the convenience of battery module installation.

[0038] In addition, the upper shell is divided into a first upper shell and a second upper shell, and the lower shell is divided into a first lower shell and a second lower shell. The beneficial effect of this arrangement is that when the battery module in the battery pack shell needs to be inspected and repaired, the corresponding part of the shell can be opened according to the area that needs to be repaired, thereby improving the efficiency of maintenance. Furthermore, the upper shell and the lower shell are separately arranged, and the volume of each split is smaller, which is easier to transport and store. The volume of each split is smaller, so when the split is die-cast or injection-molded, the molding time is shorter, the internal heat dissipation is more uniform during molding, and the probability of shrinkage and other adverse conditions is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the structure of a battery pack housing according to an embodiment of the present invention;

[0040] Figure 2 for Figure 1 A first exploded schematic diagram of a battery pack housing;

[0041] Figure 3 for Figure 1 A second exploded schematic diagram of a battery pack housing;

[0042] Figure 4 for Figure 1 A third exploded schematic diagram of a battery pack housing;

[0043] Figure 5 Schematic diagram of the structure of a battery pack according to an embodiment of the present invention.

[0044] The meanings of the reference numerals are as follows:

[0045] 10. Upper shell; 1011. Quadrilateral upper top plate; 10111. Upper reinforcing rib; 11. First upper shell; 12. Second upper shell; 101. Upper installation space; 110. First upper space; 111. First upper flange; 112. Second upper flange; 120. Second upper space; 13. Upper fixing piece; 14. Upper fixing column; 141. Upper locking hole; 20. Lower shell; 2011. Quadrilateral lower bottom plate; 20111. Lower reinforcing rib; 21. First lower shell; 22, second lower shell; 201, lower installation space; 210, first lower space; 211, first lower flange; 212, second lower flange; 23, lower fixing member; 24, lower fixing column; 241, lower locking hole; 220, second lower space; 40, end plate; 50, side plate; 51, heat dissipation hole; 60, battery module; 70, annular step; 80, cooling fan; 90, external terminal; 91, positive pole; 92, negative pole. DETAILED DESCRIPTION

[0046] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0049] See also Figure 1 , Figure 2 and Figure 3 The present invention discloses a battery pack shell, including an upper shell 10 and a lower shell 20; the upper shell 10 is provided with an upper installation space 101, and the lower shell 20 is provided with a lower installation space 201. The upper shell 10 and the lower shell 20 are relatively buckled, and the upper installation space 101 and the lower installation space 201 are enclosed to form a closed space; the depth of the upper installation space 101 and the lower installation space 201 are both less than the height of the battery module 60 placed in the installation space.

[0050] Among them, with the vertical direction as a reference, the upper shell 10 and the lower shell 20 are respectively provided with U-shaped grooves, and these two grooves correspond to the aforementioned upper installation space 101 and lower installation space 201. The upper shell 10 is buckled on the lower shell 20, and the upper installation space 101 and the lower installation space 201 form a closed space.

[0051] It can be seen that the closed space is used to place the battery module 60. The key point of this embodiment is that the depth of the upper installation space 101 and the lower installation space 201 are both less than the height of the battery module 60 placed in the installation space. When installing the battery module 60, the upper part of the side of the battery module 60 is usually grasped to install the battery module 60 into the lower shell 20. The height of the battery module 60 is higher than the depth of the lower shell 20, and the upper part of the battery module 60 protrudes outside the lower shell 20. Therefore, the side wall of the lower shell 20 does not affect the grasping of the battery module 60, which facilitates the installation and adjustment of the battery module 60 in the lower shell 20, and improves the installation efficiency and the accuracy of the installation position.

[0052] In addition, the upper shell 10 and the lower shell 20 of the present embodiment can be fixed by connecting with bolts after punching holes, or by tying straps or clamping plates between the upper shell 10 and the lower shell 20. Other methods can also be fixing with brackets, etc., which will not be repeated here.

[0053] Optionally, the specific structures of the upper shell 10 and the lower shell 20 provided with grooves can be referred to as follows: the upper shell 10 includes a quadrilateral upper top plate 1011, two upper side plates and two upper end plates, the two upper side plates are arranged one-to-one on two opposite sides of the quadrilateral upper top plate 1011, and the two upper end plates are arranged one-to-one on the other two opposite sides of the quadrilateral upper top plate 1011; the lower shell 20 includes a quadrilateral lower bottom plate 2011, two lower side plates and two lower end plates, the two lower side plates are arranged one-to-one on two opposite sides of the quadrilateral lower bottom plate 2011, and the two lower end plates are arranged one-to-one on the other two opposite sides of the quadrilateral lower bottom plate 2011.

[0054] The upper shell 10 and the lower shell 20 are fastened together to form a multi-faceted cube. In this embodiment, a battery pack shell with a rectangular structure is selected. It should be noted that when the upper shell 10 and the lower shell 20 are fastened together, an upper end plate and a lower end plate are fastened together, and an upper side plate and a lower side plate are fastened together, thereby surrounding and sealing the entire battery pack shell.

[0055] Optionally, upper fixing columns 14 are provided on the four outer corners of the quadrilateral upper top plate 1011, and the upper fixing columns 14 are provided with upper locking holes 141. Lower fixing columns 24 are provided on the four outer corners of the quadrilateral lower bottom plate 2011, and the lower fixing columns 24 are provided with lower locking holes 241. When the upper shell 10 and the lower shell 20 are relatively buckled, the four upper locking holes 141 and the four lower locking holes 241 are aligned one by one to form a locking channel, and a locking piece (not shown in the figure) is provided in the locking channel to lock the upper shell 10 and the lower shell 20 closed.

[0056] Among them, in the above-mentioned upper shell 10 and lower shell 20, the upper installation space 101 is formed by connecting and enclosing two upper side plates and two upper end plates on the sides of the quadrilateral upper top plate 1011 in sequence; similarly, the lower installation space 201 is formed by connecting and enclosing two lower end plates and two lower side plates on the sides of the quadrilateral lower bottom plate 2011 in sequence. In this embodiment, a locking method of the upper shell 10 and the lower shell 20 is provided. It is mentioned above that the four outer corners of the quadrilateral upper top plate 1011 are all provided with upper fixing columns 14, and the four outer corners of the quadrilateral lower bottom plate 2011 are all provided with lower fixing columns 24. The two ends of the above-mentioned upper end plate and upper side plate are connected to the side walls of the corresponding two adjacent upper fixing columns 14; the two ends of the lower end plate and lower side plate are connected to the side walls of the corresponding two adjacent lower fixing columns 24.

[0057] For example, the upper fixing column 14 and the lower fixing column 24 of the present embodiment are both selected as quadrilateral columns, which are easier to align with the edges of the upper shell 10 and the lower shell 20, thereby improving the overall aesthetics of the battery pack shell. More importantly, the quadrilateral end surface area of ​​the quadrilateral column is larger, which is conducive to the opening of the upper locking hole 141 and the lower locking hole 241 as mentioned above, and the locking member can be selected as a bolt or a lock. In addition, in order to prevent the locking member from protruding from the top or bottom of the battery pack shell in the vertical direction (that is, the height direction of the battery pack shell) after the locking is completed, in the vertical direction, the end faces of the upper fixing column 14 and the lower fixing column 24 away from each other are provided with hidden grooves, and have ends of hidden locking members.

[0058] Specifically, the upper fixing column 14 and the lower fixing column 24 can be used as supporting columns, which respectively enhance the supporting strength of the upper shell 10 and the lower shell 20 and improve the overall structural strength of the battery pack shell.

[0059] In addition, the end faces and side faces of the upper fixing column 14 and the lower fixing column 24 do not protrude from the bottom surface and side faces of the upper shell 10 and the lower shell 20, respectively, thereby avoiding the upper fixing column 14 and the lower fixing column 24 from being bumped against the outside, while also ensuring the flatness of the outer facades of the upper shell 10 and the lower shell 20.

[0060] Optionally, the upper side panels and the lower side panels that are interlocked with each other are integrally formed to form the side panels 50, and the upper end panels and the lower end panels that are interlocked with each other are integrally formed to form the end panels 40; the upper fixed columns 14 and the lower fixed columns 24 that are interlocked with each other form a group of connecting columns, and a accommodating space is formed between two adjacent groups of connecting columns. The four connecting columns form four accommodating spaces, and the two side panels 50 and the two end panels 40 are arranged in the four accommodating spaces in a one-to-one correspondence.

[0061] Among them, combined with the above, it can be known that in the vertical direction, an upper end plate and a lower end plate are correspondingly buckled in a group, and an upper side plate and a lower side plate are correspondingly buckled in a group. Now a group of upper end plates and lower end plates are combined into an end plate 40, and a group of upper side plates and lower side plates are combined into a side plate 50. The four aforementioned accommodating spaces can connect the inner and outer sides of the battery pack shell. In this embodiment, the components inside the battery pack shell can be inspected or repaired by removing the end plate 40 and the side plate 50, so there is no need to disassemble the upper shell 10 and the lower shell 20 as a whole, thereby improving the efficiency of inspection or repair.

[0062] In addition, the peripheral edge of the accommodating space is provided with an inwardly recessed annular step, and the end plate 40 or the side plate 50 is embedded in the annular step 70, so that the end plate or the side plate 50 does not protrude from the side of the battery pack shell and is hidden, thereby preventing bumps and improving the overall aesthetics of the battery pack shell. It should be noted that the annular step is provided in half on the upper shell 10 and the lower shell 20, and the two are buckled together to form a complete closed loop.

[0063] Alternatively, the end plate 40 and the side plate 50 may be mounted on the annular step by welding or gluing, and preferably, they may be screwed to the annular step by screws.

[0064] Optionally, heat dissipation holes 51 are provided on the side plate 50 .

[0065] Among them, at least one side panel 50 may be provided with a heat dissipation hole 51, which includes but is not limited to a round hole or a square hole. In this embodiment, both side panels are provided with heat dissipation holes 51, and the heat dissipation holes 51 on the two side panels can better form convection and improve heat dissipation efficiency. The shape and number of the heat dissipation holes 51 are not limited here, and can be set according to actual design needs.

[0066] The optional schemes for the heat dissipation hole 51 structure are as follows: First, the heat dissipation hole 51 can be a small-diameter hole, and the diameter range of the small-diameter hole is 2mm-5mm. In this embodiment, there are multiple small-diameter holes, and the multiple small-diameter holes are arranged in sequence on the side plate of the battery pack shell. Second, the heat dissipation hole 51 is a large-diameter hole, and the diameter range of the large-diameter hole is 10mm-15mm. Similarly, there are multiple large-diameter holes, and the multiple large-diameter holes are arranged in sequence on the side plate of the battery pack shell. Different from the small-diameter holes, the large-diameter holes are provided with baffle bars, and the baffle bars can be selected as straight bars. The straight bars are arranged in the heat dissipation holes. The setting angle and the interval between two adjacent straight bars can be set as needed, which will not be repeated here. Alternatively, when the heat dissipation hole is a circular hole, the multiple barrier strips may be multiple circular rings of different diameters, the multiple circular rings are concentrically arranged in order from small to large diameters, the multiple circular rings are connected by one or more straight strips to form a whole with a circular outer contour, and this whole can be set in the circular hole-shaped heat dissipation hole; for example, in this embodiment, two straight strips are cross-arranged, and the multiple circular rings are respectively connected to the two straight strips, and the ends of the two straight strips are respectively connected to the edges of the heat dissipation hole.

[0067] Optionally, upper reinforcing ribs 10111 are provided on the quadrilateral upper top plate 1011 ; and / or lower reinforcing ribs 20111 are provided on the quadrilateral lower bottom plate 2011 .

[0068] The upper reinforcing ribs 10111 and the lower reinforcing ribs 20111 in this embodiment can be provided together or separately. Preferably, the upper reinforcing ribs 10111 and the lower reinforcing ribs 20111 occupy the internal space of the battery pack shell, and the upper reinforcing ribs 10111 are provided on the outer side of the quadrilateral upper top plate 1011, and the lower reinforcing ribs 20111 are provided on the outer side of the quadrilateral lower bottom plate 2011.

[0069] For example, the number of upper reinforcing ribs 10111 and lower reinforcing ribs 20111 are both multiple, and the multiple upper reinforcing ribs 10111 are arranged along the length direction of the upper shell 10, or the multiple upper reinforcing ribs 10111 are arranged crosswise. In addition, the multiple lower reinforcing ribs 20111 can refer to the arrangement method of the multiple upper reinforcing ribs 10111, which will not be repeated here.

[0070] Optionally, in the height direction of the battery pack shell, the upper shell 10 and the lower shell 20 are symmetrically arranged with a plane perpendicular to the height direction of the battery pack shell and passing through the midpoint of the height direction of the battery pack shell as a reference plane.

[0071] The upper shell 10 and the lower shell 20 can be made to have the same structure, so that they are symmetrically arranged from top to bottom. To explain further, the upper shell 10 and the lower shell 20 are usually made using processes such as stamping, die casting or injection molding, which involve the use of molds. The upper shell 10 and the lower shell 20 have the same structure, which can reduce the number of manufacturing molds and reduce manufacturing costs.

[0072] Optional, see Figure 4 The upper shell 10 includes a first upper shell 11 and a second upper shell 12; the first upper shell 11 includes a first upper space 110, and the second upper shell 12 includes a second upper space 120. The first upper shell 11 and the second upper shell 12 are relatively buckled, and the first upper space 110 and the second upper space 120 are combined to form an upper installation space 101.

[0073] And / or, the lower shell 20 includes a first lower shell 21 and a second lower shell 22; the first lower shell 21 includes a first lower space 210, the second lower shell 22 includes a second lower space 220, the first lower shell 21 and the second lower shell 22 are relatively snapped together, and the first lower space 210 and the second lower space 220 are combined to form a lower installation space 201.

[0074] The focus of this embodiment is on the technical solution for splitting the upper shell 10 and the lower shell 20. The technical solution for splitting the two components can be implemented simultaneously or separately.

[0075] Optionally, with the midline of the length direction of the upper shell 10 as a reference, the first upper shell 11 and the second upper shell 12 are symmetrically arranged with respect to the midline of the length direction of the upper shell 10 .

[0076] And / or, with the center line of the length direction of the lower shell 20 as a reference, the first lower shell 21 and the second lower shell 22 are symmetrically arranged about the center line of the length direction of the lower shell 20 .

[0077] Among them, it can be known that the above-mentioned upper shell 10 and lower shell 20 are separated by the center line reference of their respective length directions; in other schemes, the upper shell 10 and the lower shell 20 can be divided and split based on other line segments or reference planes on themselves. For the convenience of description, the individuals after the upper shell 10 and the lower shell 20 are split can be collectively referred to as sub-shells.

[0078] Preferably, in this embodiment, the upper shell 10 and the lower shell 20 are separated and split based on the midline of their respective length directions. The advantage of this is that the corresponding sub-shells can have a symmetrical structure, which also has the effect of reducing the number of molds and reducing costs as mentioned above.

[0079] Alternatively, in other embodiments, the upper shell 10 and the lower shell 20 may be separated based on the midline of their respective width directions. Alternatively, the upper shell 10 and the lower shell 20 may be separated in different proportions in their respective length directions or width directions, such as a 4:6 ratio, a 3:7 ratio, etc.

[0080] In addition to the upper shell 10 and the lower shell 20 being divided into two parts, they can also be divided into three parts or more. Moreover, in addition to the division in the length direction and the width direction, they can also be divided in an oblique direction. If the designer needs, the above-mentioned various division methods can also be combined for use.

[0081] It should be noted that no matter which division method is used, the division method and proportion of the upper shell 10 and the lower shell 20 should be the same, so as to ensure that there are the largest number of sub-shells with symmetrical structures between the upper shell 10 and the lower shell 20, and also for the number of molds used in the subsequent sub-shell manufacturing, thereby reducing the manufacturing cost.

[0082] The above focuses are all on the division of the upper shell 10 and the lower shell 20. The effects of the division of the two are: first, the two convert large parts into small parts, which can easily avoid the problems of local shrinkage caused by inconsistent cooling speeds in different areas of the large parts during manufacturing processes such as injection molding. At the same time, the separation of small parts facilitates the transportation and storage of the upper shell 10 and the lower shell 20; secondly, each sub-shell can be replaced separately. If individual sub-shells are damaged, they can be replaced in a targeted manner to avoid the high cost of overall replacement; thirdly, according to the position of the battery module corresponding to different sub-shells, when it is necessary to inspect or repair a specific area of ​​the battery module, the sub-shell at the corresponding position can be opened to improve work efficiency.

[0083] In addition, the division of the upper shell 10 and the lower shell 20 also involves the symmetry between the corresponding sub-shells of the upper shell 10 and the lower shell 20. Preferably, the symmetry between the corresponding sub-shells of the upper shell 10 and the lower shell 20 can be further achieved, thereby reducing the use of molds to a greater extent and further reducing manufacturing costs.

[0084] In combination with the foregoing, both the upper reinforcing ribs 10111 and the lower reinforcing ribs 20111 can be dispersedly arranged in the corresponding sub-shells.

[0085] Optional, see Figure 4 The first upper shell 11 is provided with a first upper flange 111 at an edge thereof for buckling with the second upper shell 12 , and the second upper shell 12 is provided with a second upper flange 112 at an edge thereof for buckling with the first upper shell 11 .

[0086] A plurality of first upper fixing holes are arranged along the length direction of the first upper flange 111, and a plurality of second upper fixing holes are arranged along the length direction of the second upper flange 112. The plurality of first upper fixing holes and the plurality of second upper fixing holes correspond one-to-one to form a first fixing channel, and the upper fixing member 13 is arranged in the first fixing channel to lock and connect the first upper flange 111 and the second upper flange 112.

[0087] And / or, the edge of the first lower shell 21 for buckling with the second lower shell 22 is provided with a first lower flange 211, and the edge of the second lower shell 22 for buckling with the first lower shell 21 is provided with a second lower flange 212.

[0088] A plurality of first lower fixing holes are arranged along the length direction of the first lower flange 211, and a plurality of second lower fixing holes are arranged along the length direction of the second lower flange 212. The plurality of first lower fixing holes and the plurality of second lower fixing holes correspond one-to-one to form a second fixing channel, and the lower fixing member 23 is arranged in the second fixing channel to lock and connect the first lower flange 211 and the second lower flange 212.

[0089] The first upper flange 111 and the second upper flange 112 are set as one setting scheme, and the first lower flange 211 and the second lower flange 212 are set as another scheme. These two schemes can be set separately or together.

[0090] Preferably, in order to prevent the first upper flange 111, the second upper flange 112, the first lower flange 211 and the second lower flange 212 from occupying the internal space of the battery pack shell, all of the above flanges can be optionally arranged on the outer surface of the battery pack shell. In this embodiment, the first upper shell 11 and the second upper shell 12 are obtained by wind splitting the upper shell 10 along the midline of the length direction, and the first lower shell 21 and the second lower shell 22 are obtained by wind splitting the lower shell 20 along the midline of the length direction.

[0091] The key point is that after the first upper shell 11 and the second upper shell 12 are buckled together, the first upper flange 111 and the second upper flange 112 are aligned, and after the first lower shell 21 and the second lower shell 22 are buckled together, the first lower flange 211 and the second lower flange 212 are aligned. In this embodiment, the upper fixing member 13 and the lower fixing member 23 are preferably bolts, and the upper fixing member 13 locks the first upper flange 111 and the second upper flange 112 in the above manner, and the lower fixing member 23 locks the first lower shell 21 and the second lower shell 22 in the above manner.

[0092] It should be noted that if the upper shell 10 and the lower shell 20 involve other division methods mentioned above, the edges of the sub-shells generated by each division method have corresponding flanges. After the sub-shells are assembled, the two adjacent flanges can be locked by the above-mentioned bolt locking method, which will not be repeated here.

[0093] See also Figure 5 The present invention also relates to a battery pack, comprising a battery module 60 and a battery pack shell as described above; the battery module is arranged in the battery pack shell.

[0094] It has been explained above that the battery module is arranged in the battery pack shell. The specific installation method is: grab the upper part of the side of the battery module 60 and place it into the lower shell 20. After determining the position of the battery module 60 in the lower shell 20, then snap the upper shell 10 onto the lower shell 20 and lock the two together with the locking parts, and then install each end plate 40 and each side plate 50.

[0095] In addition, it can be known that the battery pack usually also includes a battery management system (BMS) and a positive electrode column 91 and a negative electrode column 92 for external connection. The battery management system is arranged in the battery pack shell and is electrically connected to the battery module 60. The positive electrode column 91 and the negative electrode column 92 are installed on the end plate 40, one end of which is located in the battery pack shell and is electrically connected to the battery management system, and the other end is arranged outside the battery pack shell.

[0096] In particular, the battery pack of this embodiment also includes at least one cooling fan 80, and the cooling holes 51 on the side plate 50 may be multiple. In combination with the above, the cooling fan 80 is arranged between the cooling holes 51 of the side plate 50 and the side of the battery module 60. Preferably, the cooling fans 80 can be arranged on both sides of the battery module 60, and the cooling fans 80 blow air toward the cooling holes 51. In addition, the number of cooling fans 80 is multiple, and multiple cooling fans 80 can be arranged on the same side of the battery module 60. The cooling fans 80 are arranged at both ends with the center of the length direction of the side plate 50 as a reference. The cooling fan 80 on the side of the battery module 60 is shorter in a straight line distance from the middle of the battery module 60, which effectively takes away the heat from the middle of the battery module 60 and avoids the problem of local overheating of the battery module 60. In addition, the cooling fan 80 is connected to an external terminal 90, which is arranged on the end plate 40 and is used for an external power supply to drive the cooling fan 80 to rotate. More preferably, the positive pole 91, the negative pole 92 and the external terminal 90 are all arranged on the same end plate 40, the purpose of which is to facilitate the installation of various components and unify the wiring direction of various components, thereby reducing the difficulty of wiring.

[0097] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A battery pack housing, characterized in that: It comprises an upper shell (10) and a lower shell (20); The upper housing (10) is provided with an upper installation space (101). The lower shell (20) is provided with a lower installation space (201); the upper shell (10) and the lower shell (20) are relatively buckled, and the upper installation space (101) and the lower installation space (201) are enclosed to form a closed space; The depths of the upper installation space (101) and the lower installation space (201) are both less than the height of the battery module (60) placed in the closed space; in, The upper shell (10) comprises a first upper shell (11) and a second upper shell (12); The first upper shell (11) comprises a first upper space (110), the second upper shell (12) comprises a second upper space (120), the first upper shell (11) and the second upper shell (12) are relatively buckled, and the first upper space (110) and the second upper space (120) are combined to form the upper installation space (101); And / or, the lower shell (20) includes a first lower shell (21) and a second lower shell (22); The first lower shell (21) includes a first lower space (210), the second lower shell (22) includes a second lower space (220), the first lower shell (21) and the second lower shell (12) are relatively engaged, and the first lower space (210) and the second lower space (220) are combined to form the lower installation space (201).

2. The battery pack housing according to claim 1, characterized in that: Taking the midline of the length direction of the upper shell (10) as a reference, the first upper shell (11) and the second upper shell (12) are symmetrically arranged with respect to the midline of the length direction of the upper shell (10); And / or, taking the midline of the length direction of the lower shell (20) as a reference, the first lower shell (21) and the second lower shell (22) are symmetrically arranged with respect to the midline of the length direction of the lower shell (20).

3. The battery pack housing according to claim 1, characterized in that: The first upper shell (11) is provided with a first upper flange (111) at an edge thereof for buckling with the second upper shell (12), and the second upper shell (12) is provided with a second upper flange (112) at an edge thereof for buckling with the first upper shell (11); A plurality of first upper fixing holes are arranged along the length direction of the first upper flange (111), and a plurality of second upper fixing holes are arranged along the length direction of the second upper flange (112), the plurality of first upper fixing holes and the plurality of second upper fixing holes correspond to each other one by one to form a first fixing channel, and an upper fixing member (13) is arranged in the first fixing channel to lock and connect the first upper flange (111) and the second upper flange (112); and / or, the edge of the first lower shell (21) for buckling with the second lower shell (22) is provided with a first lower flange (211), and the edge of the second lower shell (22) for buckling with the first lower shell (21) is provided with a second lower flange (212); A plurality of first lower fixing holes are arranged along the length direction of the first lower flange (211), and a plurality of second lower fixing holes are arranged along the length direction of the second lower flange (212). The plurality of first lower fixing holes and the plurality of second lower fixing holes correspond one-to-one to form a second fixing channel. A lower fixing member (23) is arranged in the second fixing channel to lock and connect the first lower flange (211) and the second lower flange (212).

4. The battery pack housing according to any one of claims 1 to 3, characterized in that: The upper shell (10) comprises a quadrilateral upper top plate (1011), two upper side plates and two upper end plates. The two upper side plates are arranged one-to-one on two opposite sides of the quadrilateral upper top plate (1011), and the two upper end plates are arranged one-to-one on the other two opposite sides of the quadrilateral upper top plate (1011); The lower shell (20) comprises a quadrilateral lower bottom plate (2011), two lower side plates and two lower end plates. The two lower side plates are arranged one-to-one on two opposite sides of the quadrilateral lower base plate (2011), and the two lower end plates are arranged one-to-one on the other two opposite sides of the quadrilateral lower base plate (2011).

5. The battery pack housing according to claim 4, characterized in that: The four outer corners of the quadrilateral upper top plate (1011) are each provided with an upper fixing column (14), and the upper fixing column (14) is provided with an upper locking hole (141); the four outer corners of the quadrilateral lower bottom plate (2011) are each provided with a lower fixing column (24), and the lower fixing column (24) is provided with a lower locking hole (241); When the upper shell (10) and the lower shell (20) are relatively buckled, the four upper locking holes (141) and the four lower locking holes (241) are aligned one by one to form a locking channel, so that the upper shell (10) and the lower shell (20) are locked and closed by a locking member arranged in the locking channel.

6. The battery pack housing according to claim 5, characterized in that: The upper side plate and the lower side plate that are interlocked are integrally formed to form a side plate (50), and the upper end plate and the lower end plate that are interlocked are integrally formed to form an end plate (40); The upper fixing column (14) and the lower fixing column (24) that are interlocked form a group of connecting columns, and a receiving space is formed between two adjacent groups of connecting columns. Four connecting columns form four receiving spaces, and the two side plates (50) and the two end plates (40) are arranged in the four receiving spaces in a one-to-one correspondence.

7. The battery pack casing according to claim 6, characterized in that: The side plate (50) is provided with heat dissipation holes (51); in, The heat dissipation holes are small-diameter holes, the number of the small-diameter holes is multiple, and the multiple small-diameter holes are arranged in sequence; Alternatively, the heat dissipation hole is a large-diameter hole, and a plurality of baffle bars are arranged in the large-diameter hole.

8. The battery pack casing according to claim 4, characterized in that: The quadrilateral upper top plate (1011) is provided with a plurality of upper reinforcing ribs (10111), and the plurality of upper reinforcing ribs (10111) are arranged in an arranged manner or cross-arranged with each other; And / or, a plurality of lower reinforcing ribs (20111) are arranged on the quadrilateral lower base plate (2011), and the plurality of lower reinforcing ribs (20111) are arranged in an arranged manner or cross-arranged with each other.

9. The battery pack housing according to claim 1, 2, 3, 4, 6, 7, or 8, characterized in that: In the height direction of the battery pack shell, the upper shell (10) and the lower shell (20) are symmetrically arranged with a plane perpendicular to the height direction of the battery pack shell and passing through the midpoint of the height direction of the battery pack shell as a reference plane.

10. A battery pack, characterized in that: Comprising a battery module (60) and a battery pack housing as described in any one of claims 1 to 9; The battery module is disposed in the battery pack housing.

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