Battery pack

Abstract

The utility model relates to the technical field of new energy batteries, and discloses a battery pack which comprises a box body, a box body main body, a first beam extending along a first direction and a second beam extending along a second direction, at least one end of the box body main body along the first direction is provided with an opening, the first beam is arranged in the box body main body, and the second beam is arranged in the box body main body. The multiple first beams are arranged in the second direction, the second beams and the first beams are arranged in a crossed mode, a mounting space is defined by the sides, facing the opening, of every two adjacent first beams and the corresponding second beam, and the mounting spaces correspond to the opening in the first direction; the plurality of battery modules are arranged in the mounting space, the battery modules are electrically connected with one another, and the battery modules are detachably connected with the adjacent first beams; and the cover plate covers the opening and is detachably connected with the box main body. According to the battery pack, the first beam and the second beam are arranged, so that the battery module is limited in the mounting space, the battery module is prevented from shifting, and the stability and the safety of the battery pack are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, in particular to a battery pack. Background Art

[0002] At present, there is a drawer-type battery pack, where the battery module enters and exits from the side of the battery pack box to the inside of the battery pack box. In this type of battery pack, since the battery module is pulled in and out, it is easy for the battery module to be out of position inside the battery pack box, which is not conducive to the product quality and safety of the battery pack. Utility Model Content

[0003] The purpose of the utility model is to provide a battery pack that can improve the stability and safety of the battery pack.

[0004] In order to achieve the above object, the utility model provides a battery pack, comprising:

[0005] A box body, comprising a box body body, a first beam extending along a first direction, and a second beam extending along a second direction, wherein the box body body is provided with an opening on at least one end along the first direction, the box body body has a chamber, the first beam is arranged in the chamber, a plurality of the first beams are provided and arranged along the second direction, the second beam is arranged to cross the first beam, two adjacent first beams and the second beams enclose an installation space, and the installation space is connected to the opening along the first direction;

[0006] A plurality of battery modules are provided in the installation space, and each of the battery modules is detachably connected to the first beam corresponding to its position;

[0007] Wherein, the first direction and the second direction intersect each other.

[0008] The battery module includes a shell and a lifting ear, the shell includes a first end surface arranged along the first direction corresponding to the opening, the lifting ear is arranged at both ends of the first end surface along the second direction, and the lifting ear is detachably connected to the first beam.

[0009] A second groove is provided on one end of the first beam pointing to the opening in the first direction, and the second groove is used for simultaneously plugging the lifting ears of two adjacent battery modules.

[0010] In some embodiments of the present application:

[0011] The lifting ear is connected to an end surface of one end of the first beam pointing to the opening in the first direction.

[0012] In some embodiments of the present application:

[0013] The box body is provided with the openings at both ends along the first direction;

[0014] The battery modules are divided into two groups along the first direction, and the battery modules in each group are provided in plurality and arranged along the second direction.

[0015] In some embodiments of the present application:

[0016] The battery module comprises a shell and a pole, the shell comprises a second end surface arranged along the first direction toward the second beam, and the pole is arranged on the second end surface;

[0017] The poles of the two groups of battery modules are arranged opposite to each other in the first direction, and the battery modules are electrically connected through their respective poles.

[0018] In some embodiments of the present application:

[0019] The second beam has an inner cavity, and the second beam includes two side surfaces arranged opposite to each other along the first direction, and the side surfaces have through holes connecting the inner cavity and each of the installation spaces;

[0020] The box body includes a bus bar, which is arranged in the inner cavity, and the poles pass through the through holes and are connected through the bus bar.

[0021] In some embodiments of the present application:

[0022] The pole comprises a first pole and a second pole, the first pole and the second pole have opposite polarities, and the first pole has a first groove at one end away from the housing along the first direction;

[0023] The busbar includes an inserting portion, a connecting portion and a slot portion, wherein the inserting portion and the slot portion are connected via the connecting portion, the inserting portion is inserted in the first groove, and the second pole is inserted in the slot portion.

[0024] In some embodiments of the present application:

[0025] The box body further includes a glue layer, which is filled in the inner cavity and wraps the busbar.

[0026] In some embodiments of the present application:

[0027] The battery module comprises a shell and a first guide structure, wherein the first guide structure is arranged on at least one side surface of the shell in the second direction;

[0028] The box body also includes a second guide structure, which is arranged on at least one side of the first beam in the second direction, and the first guide structure and the second guide structure cooperate with each other and are used to guide the movement of the battery module in the first direction.

[0029] In some embodiments of the present application:

[0030] The box body further comprises a cooling pipeline, the cooling pipeline is arranged in the chamber, the box body main body has a water inlet and a water outlet on one side in the second direction, the cooling pipeline is connected with the water inlet and the water outlet;

[0031] The battery module includes a shell, the shell includes a first end surface arranged along the first direction corresponding to the opening, the first end surface also has a liquid inlet and a liquid outlet, and the cooling pipeline is also connected to the liquid inlet and the liquid outlet.

[0032] In some embodiments of the present application:

[0033] The cooling circuit comprises:

[0034] a water inlet pipeline, comprising a first fixed pipeline and a first movable pipeline, wherein the first fixed pipeline is arranged in the chamber on one side of the battery module along the second direction, the fixed pipeline is connected to the water inlet, the first movable pipeline extends along the second direction, the first movable pipeline is detachably connected to the first fixed pipeline, and in the first direction, the first movable pipeline is arranged between the battery module and the opening;

[0035] The water outlet pipeline includes a second fixed pipeline and a second movable pipeline, the second fixed pipeline is arranged in the chamber on one side of the battery module along the second direction, the second fixed pipeline is connected to the water outlet, the second movable pipeline extends along the second direction, the second movable pipeline is detachably connected to the second fixed pipeline, and in the first direction, the second movable pipeline is arranged between the battery module and the opening.

[0036] The utility model provides a battery pack, which has the following beneficial effects compared with the prior art:

[0037] The battery pack of the utility model includes a box body, a battery module and a cover plate. An opening is provided on at least one end of the box body along a first direction. A first cross beam and a second cross beam are provided inside the box body. Two adjacent first beams and a side of the second beam facing the opening enclose an installation space. The battery module is provided in the installation space. Each battery module is detachably connected to the first beam corresponding to its position. By providing the first beam and the second beam, the battery module is limited in the installation space. The lifting lug provided on the battery module is detachably connected to the first beam, fixing the position of the battery module, preventing the battery module from being out of position, and improving the stability and safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure of a battery pack according to an embodiment of the utility model.

[0039] Figure 2 It is a partial structural schematic diagram of a battery pack according to an embodiment of the utility model.

[0040] Figure 3 It is a structural schematic diagram of the box body of the utility model embodiment.

[0041] Figure 4 yes Figure 3 A magnified schematic diagram of center A.

[0042] Figure 5 It is a schematic diagram of a battery module according to an embodiment of the utility model installed in an installation space.

[0043] Figure 6 yes Figure 5 Enlarged schematic diagram of point C in the middle.

[0044] Figure 7 yes Figure 5 A magnified schematic diagram of point B in the middle.

[0045] Figure 8 It is a schematic diagram of a part of the battery module of an embodiment of the utility model.

[0046] Fig. 9 It is a partial structural schematic diagram of a battery module according to an embodiment of the utility model.

[0047] Fig.10 It is a schematic diagram of a busbar according to an embodiment of the utility model.

[0048] Fig.11 It is a schematic diagram of a fixing base according to an embodiment of the utility model.

[0049] In the figure, 1, box body; 2, battery module; 3, cover plate;

[0050] 11. Box body; 12. First beam; 13. Installation space; 14. Second beam; 15. Bus bar; 16. Glue layer; 17. Second guide structure; 18. Cooling pipeline; 19. Fixing seat;

[0051] 111, opening; 112, water inlet; 113, water outlet; 114, chamber; 121, second groove; 141, inner cavity; 142, side; 151, insertion portion; 152, slot portion; 153, connection portion; 181, water inlet pipeline; 182, water outlet pipeline; 1811, first fixed pipeline; 1812, first movable pipeline; 1821, second fixed pipeline; 1822, second movable pipeline;

[0052] 21. Shell; 22. Accommodating cavity; 23. Lifting ear; 24. First pole; 25. Second pole; 26. First guide structure;

[0053] 241, first groove; 211, first end surface; 212, second end surface; 2111, liquid inlet; 2112, liquid outlet;

[0054] X, second direction; Y, first direction. DETAILED DESCRIPTION

[0055] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0056] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and 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 orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0059] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0060] A battery pack according to a preferred embodiment of the present utility model comprises: a box body 1 , a battery module 2 and a cover plate 3 .

[0061] Please refer to Figure 1 and Figure 2 The box body 1 includes a box body 11, a first beam 12 extending along a first direction Y, and a second beam 14 extending along a second direction X. An opening 111 is provided on at least one end of the box body 11 along the first direction Y. The box body 11 has a chamber 114. The first beam 12 and the second beam 14 are arranged in the chamber 114. A plurality of first beams 12 are provided and arranged along the second direction X. The second beam 14 is arranged crosswise with the first beam 12. Two adjacent first beams 12 and the second beam 14 face the side of the opening 111 to form an installation space 13. The installation space 13 is communicated with the opening 111 along the first direction Y.

[0062] In this embodiment, the length direction of the box body 1 is the second direction X, the width direction of the box body 1 is the first direction Y, and the height direction of the box body 1 is the third direction Z. The second direction X, the first direction Y, and the third direction Z are perpendicular to each other. Perpendicular refers to a state where the angle is 85° to 95°.

[0063] In this embodiment, since an opening 111 is provided on the side surface of the box body 1 along the length direction, the opening 111 is used for entering and exiting the battery module 2 .

[0064] There are multiple battery modules 2 arranged in the installation space 13 , and the battery modules 2 are electrically connected to each other. Each battery module 2 is detachably connected to the first beam 12 corresponding to its position.

[0065] The battery module 2 includes a plurality of single cells, which are arranged in a plurality of rows. The single cells are electrically connected to adjacent single cells, and all the single cells are electrically connected in series or in parallel.

[0066] When assembling and maintaining the battery pack, the opening 111 is accessed in units of battery modules 2 .

[0067] The battery module 2 is detachably connected to the first beam 12 corresponding to its position, that is, the battery module 2 is detachably connected to the first beam 12 near itself.

[0068] When the battery module 2 is installed in the installation space 13 , at this time, except for the side facing the opening 111 , the other side surfaces of the battery module 2 can be limited by the first beam 12 and the second beam 14 adjacent thereto, thereby limiting the position of the battery module 2 .

[0069] The cover plate 3 is disposed on the opening 111 and is detachably connected to the box body 11 , and the cover plate 3 closes the opening 111 .

[0070] In the battery pack of this embodiment, the first beam 12 and the second beam 14 are arranged inside the box body, so that the battery module 2 is limited in the installation space 13, thereby preventing the battery module 2 from being out of position, thereby improving the stability and safety of the battery pack.

[0071] Please refer to Figure 5 and Fig. 9 The battery module 2 includes a shell 21 and a lifting ear 23. The shell 21 includes a first end surface 211 arranged along the first direction Y corresponding to the opening 111. The lifting ear 23 is arranged at both ends of the first end surface 211 along the second direction X. The lifting ear 23 is detachably connected to the first beam 12.

[0072] The housing 21 has a receiving chamber 22 inside, and the single battery is arranged inside the receiving chamber 22 .

[0073] The lifting lug 23 is used to fix the battery module 2 inside the box 1. By providing a detachable connection between the lifting lug 23 and the first beam 12, the detachable connection between the battery module 2 and the box body 11 is realized, which is convenient for loading and unloading, and can save time for replacing or repairing the battery pack; it can also fix the position of the battery module 2 to prevent the battery module 2 from being out of position, thereby improving the stability and safety of the battery pack.

[0074] Please refer to Figure 3 and Figure 4 A second groove 121 is provided on one end of the first beam 12 pointing to the opening 111 in the first direction Y. The second groove 121 is used for simultaneously inserting the ears 23 of two adjacent battery modules 2 .

[0075] The second groove 121 is open in both directions in the second direction X to avoid the ears 23 of two adjacent battery modules 2. The second groove 121 is also open in the first direction Y pointing to the direction where the opening 111 is located. When the battery module 2 is pulled out, the ears 23 of the two adjacent battery modules 2 enter and exit the second groove 121 in the first direction Y.

[0076] Please refer to Figure 5-Figure 7 Since the ear 23 is arranged to protrude from the surface of the shell 21, the ears 23 of two adjacent battery modules 2 are inserted into the second groove 121, that is, at least a part of the ear 23 is located in the second groove 121, which facilitates the connection between the ear 23 and the first beam 12 and also reasonably utilizes the space.

[0077] In this embodiment, the lifting ear 23 is connected to the groove wall of the second groove 121 by bolts, which is convenient for installation and disassembly.

[0078] In addition, in other embodiments, the lifting ear 23 is connected to an end surface of the first beam 12 at one end of the first direction Y pointing to the opening 111 .

[0079] The first beam 12 may not be provided with the second groove 121 , and the lifting ear 23 directly contacts the end surface of the first beam 12 pointing to the opening 111 in the first direction Y, and the two may be connected by bolts.

[0080] In a specific production embodiment, the implementation of the first beam 12 and the lifting lug 23 can be selected according to actual needs.

[0081] In some embodiments, openings 111 are provided at both ends of the box body 11 along the first direction Y.

[0082] In this case, there are openings 111 at both ends of the box body 11 , and the battery module 2 can enter and exit from the openings 111 on both sides.

[0083] The battery modules 2 are divided into two groups along the first direction Y. Each group of battery modules 2 is provided in plurality and arranged along the second direction X. The battery modules 2 of each group enter and exit the chamber 114 through the corresponding side opening 111 .

[0084] In this embodiment, three battery modules 2 are provided in each group. In other embodiments, the number of battery modules 2 can be set according to actual needs.

[0085] When openings 111 are provided on both sides of the box body 11, and the battery modules 2 are pulled in and out of the openings 111, the battery modules 2 are provided in two groups, and a second beam 14 is provided between the two groups of battery modules 2 to ensure that the battery modules 2 can enter and exit the box body 1 through the openings.

[0086] Please refer to Figure 8 and Fig. 9 The battery module 2 includes a shell 21 and a pole, the shell 21 includes a second end face 212 arranged along the first direction Y toward the second beam 14, and the pole is arranged on the second end face 212; the poles of the two groups of battery modules 2 are arranged opposite to each other in the first direction Y, and each battery module 2 is electrically connected through its own pole.

[0087] The battery modules 2 of the two groups are set accordingly, please refer to Figure 8 , the respective poles are positioned relative to each other, making it convenient for each battery module 2 to be electrically connected through its respective poles.

[0088] In some embodiments, please refer to Figure 2 and Figure 3The second beam 14 has an inner cavity 141, and the second beam 14 includes two side surfaces 142 arranged opposite to each other along the first direction Y, and the side surfaces 142 have through holes connecting the inner cavity 141 and each installation space 13; the box body 1 includes a bus 15, the bus 15 is arranged in the inner cavity 141, and the poles are penetrated by the through holes and connected by the bus 15.

[0089] Since the two opposite battery modules 2 are separated by the second beam 14 , the poles of each battery module 2 extend into the inner cavity 141 , and the busbar 15 connects the poles of each battery module 2 in the inner cavity 141 , thereby electrically connecting each battery module 2 .

[0090] In some embodiments, the poles include a first pole 24 and a second pole 25 . The first pole 24 and the second pole 25 have opposite polarities. The first pole 24 has a first groove 241 at one end thereof away from the housing 21 along the first direction Y.

[0091] Please refer to Fig.10 The busbar 15 includes an inserting portion 151 , a connecting portion 153 and a slot portion 152 . The inserting portion 151 and the slot portion 152 are connected via the connecting portion 153 . The inserting portion 151 is inserted into the first groove 241 , and the second pole 25 is inserted into the slot portion 152 .

[0092] Through such a structure, part of the bus 15 is inserted on the first pole 24, and part of the second pole 25 is inserted on the bus 15. The first pole 24 and the second pole 25 of different polarities are differentiated by a fool-proof design to prevent errors in the connection direction, and the contact area can be increased to reduce the resistivity.

[0093] In addition, this arrangement can also simplify the electrical connection operation between the battery module 2 and the bus 15. When the battery module 2 is pulled out, the first pole 24 and the second pole 25 are disconnected from the bus 15. When the battery module 2 is installed, the battery module 2 is pushed into place, the insertion portion 151 is inserted into the first groove 241, and the second pole 25 is inserted into the slot portion 152, thereby achieving electrical connection with the bus 15, without the need for additional operations, and convenient disassembly and assembly.

[0094] In some embodiments, the box body 1 further includes a glue layer 16 , which fills the inner cavity 141 and wraps the bus bar 15 .

[0095] The setting of the adhesive layer 16 can fix the position of the busbar 15, so that the position of the busbar 15 will not change even if the battery module 2 is pulled out. In addition, it can also play a role in sealing and heat dissipation.

[0096] In addition, a fixing seat 19 is provided in the inner cavity 141 , and the fixing seat 19 is used to support the end of the busbar 15 .

[0097] In some embodiments, the battery module 2 includes a shell 21 and a first guide structure 26, and the first guide structure 26 is arranged on at least one side of the shell 21 in the second direction X; the box body 1 also includes a second guide structure 17, and the second guide structure 17 is arranged on at least one side of the first beam 12 in the second direction X, and the first guide structure 26 and the second guide structure 17 cooperate with each other and are used to guide the movement of the battery module 2 in the first direction Y.

[0098] Since the battery module 2 is pulled in and out of the chamber 114 from the side, the first guide structure 26 and the second guide structure 17 are provided to cooperate with each other to guide the battery module 2 to move along the first direction Y.

[0099] The first guide structure 26 and the second guide structure 17 are respectively in the shape of a groove and a rail. The first guide structure 26 can be in the shape of a groove and the second guide structure 17 can be in the shape of a rail, or the first guide structure 26 can be in the shape of a rail and the second guide structure 17 can be in the shape of a groove.

[0100] In other embodiments, other forms of guide mechanisms may also be provided, such as mutually matching groove-shaped and sliding block-shaped, mutually matching slide rail-shaped and sliding block-shaped.

[0101] In some embodiments, the box body 1 further includes a cooling pipeline 18 , which is disposed in the chamber 114 . The box body 11 has a water inlet 112 and a water outlet 113 on a side surface in the second direction X, and the cooling pipeline 18 connects the water inlet 112 and the water outlet 113 .

[0102] The battery module 2 includes a shell 21 , which includes a first end surface 211 arranged along the first direction Y corresponding to the opening 111 , and the first end surface 211 also has a liquid inlet 2111 and a liquid outlet 2112 , and the cooling pipeline 18 also connects the liquid inlet 2111 and the liquid outlet 2112 .

[0103] Since the battery pack of this embodiment has an opening 111 on the side, a water inlet 112 and a water outlet 113 are provided on the side where the opening 111 is not provided. When disassembling and assembling the battery module 2, there is no need to consider the structure around the water inlet 112 and the water outlet 113, thereby facilitating the disassembly and assembly operation.

[0104] For the battery module 2, since the battery module 2 needs to be connected to the cooling pipe 18 to achieve cooling of the battery module 2, the liquid inlet 2111 and the liquid outlet 2112 are set on the side facing the opening 111, which can facilitate the connection and disconnection of the battery module 2 and the cooling pipe 18.

[0105] In some embodiments, the cooling pipeline 18 includes a water inlet pipeline 181 and a water outlet pipeline 182 .

[0106] The water inlet pipeline 181 includes a first fixed pipeline 1811 and a first movable pipeline 1812. The first fixed pipeline 1811 is arranged in the chamber 114 on the side of the battery module 2 along the second direction X. The fixed pipeline 181 is connected to the water inlet 112. The first movable pipeline 1812 extends along the second direction X. The first movable pipeline 1812 is detachably connected to the first fixed pipeline 1811. In the first direction Y, the first movable pipeline 1812 is arranged between the battery module 2 and the opening 111.

[0107] The water outlet pipeline 182 includes a second fixed pipeline 1821 and a second movable pipeline 1822. The second fixed pipeline 1821 is arranged in the chamber 114 on the side of the battery module 2 along the second direction X. The second fixed pipeline 1821 is connected to the water outlet 113. The second movable pipeline 1822 extends along the second direction X. The second movable pipeline 1822 is detachably connected to the second fixed pipeline 1821. In the first direction Y, the second movable pipeline 1822 is arranged between the battery module 2 and the opening 111.

[0108] The first fixed pipeline 1811 and the second fixed pipeline 1821 are arranged at positions avoiding the opening 111. When the battery module 2 is pulled out, the first fixed pipeline 1811 and the second fixed pipeline 1821 will not interfere with the path of the battery module 2. Therefore, when loading and unloading the battery module 2, there is no need to consider the first fixed pipeline 1811 and the second fixed pipeline 1821.

[0109] The first movable pipeline 1812 and the second movable pipeline 1822 are to be disconnected from each battery module 2, and therefore are arranged between the battery module 2 and the opening 111 for easy operation. In addition, since the first movable pipeline 1812 and the second movable pipeline 1822 are located on the movement path of the battery module 2, the first movable pipeline 1812 and the second movable pipeline 1822 are arranged to be detachable, so as to make room for the movement of the battery module 2.

[0110] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A battery pack, characterized in that: include: A box (1) having a first direction (Y) and a second direction (X) intersecting each other, the box (1) comprising a box body (11), a first beam (12) extending along the first direction (Y), and a second beam (14) extending along the second direction (X), the box body (11) being provided with an opening (111) at at least one end along the first direction (Y), the box body (11) having a chamber (114), the first beam (12) and the second beam (14) being arranged in the chamber (114), a plurality of first beams (12) being provided and arranged along the second direction (X), the second beam (14) being arranged crosswise with the first beam (12), two adjacent first beams (12) and second beams (14) enclosing an installation space (13), the installation space (13) being connected to the opening (111) along the first direction (Y); A plurality of battery modules (2) are arranged in the installation space (13), and each of the battery modules (2) is detachably connected to the first beam (12) corresponding to its position; The battery module (2) comprises a shell (21) and a lifting lug (23), the shell (21) comprising a first end surface (211) arranged along the first direction (Y) corresponding to the opening (111), the lifting lug (23) being arranged at two ends of the first end surface (211) along the second direction (X), and the lifting lug (23) being detachably connected to the first beam (12); A second groove (121) is provided on one end of the first beam (12) pointing toward the opening (111) in the first direction (Y), and the second groove (121) is used for simultaneously plugging the lifting ears (23) of two adjacent battery modules (2); Wherein, the first direction (Y) and the second direction (X) intersect each other.

2. The battery pack according to claim 1, characterized in that: The lifting lug (23) is connected to an end surface of the first beam (12) at one end pointing toward the opening (111) in the first direction (Y).

3. The battery pack according to claim 1, characterized in that: The box body (11) is provided with the openings (111) at both ends along the first direction (Y); The battery modules (2) are divided into two groups along the first direction (Y), and the battery modules (2) in each group are provided in plurality and arranged along the second direction (X).

4. The battery pack according to claim 3, characterized in that: The battery module (2) comprises a shell (21) and a pole, the shell (21) comprising a second end surface (212) arranged along the first direction (Y) toward the second beam (14), and the pole is arranged on the second end surface (212); The poles of the two groups of battery modules (2) are arranged opposite to each other in the first direction (Y), and the battery modules (2) are electrically connected via their respective poles.

5. The battery pack according to claim 4, characterized in that: The second beam (14) has an inner cavity (141), the second beam (14) comprises two side surfaces (142) arranged opposite to each other along the first direction (Y), and the side surfaces (142) have through holes connecting the inner cavity (141) and each of the installation spaces (13); The box body (1) comprises a busbar (15), wherein the busbar (15) is arranged in the inner cavity (141), and the poles pass through the through holes and are connected via the busbar (15).

6. The battery pack according to claim 5, characterized in that: The pole comprises a first pole (24) and a second pole (25); the first pole (24) and the second pole (25) have opposite polarities; and the first pole (24) has a first groove (241) at one end thereof away from the housing (21) along the first direction (Y); The busbar (15) comprises an inserting portion (151), a connecting portion (153) and a slot portion (152); the inserting portion (151) and the slot portion (152) are connected via the connecting portion (153); the inserting portion (151) is inserted into the first groove (241); and the second pole (25) is inserted into the slot portion (152).

7. The battery pack according to claim 5, characterized in that: The box body (1) further comprises a glue layer (16), wherein the glue layer (16) is filled in the inner cavity (141), and the glue layer (16) wraps the busbar (15).

8. The battery pack according to claim 1, characterized in that: The battery module (2) comprises a shell (21) and a first guide structure (26), wherein the first guide structure (26) is arranged on at least one side surface of the shell (21) in the second direction (X); The box body (1) further comprises a second guide structure (17), wherein the second guide structure (17) is arranged on at least one side surface of the first beam (12) in the second direction (X), and the first guide structure (26) and the second guide structure (17) cooperate with each other and are used to guide the movement of the battery module (2) in the first direction (Y).

9. The battery pack according to claim 1, characterized in that: The box body (1) further comprises a cooling pipeline (18), wherein the cooling pipeline (18) is arranged in the chamber (114); the box body (11) has a water inlet (112) and a water outlet (113) on a side surface in the second direction (X); and the cooling pipeline (18) is connected to the water inlet (112) and the water outlet (113); The battery module (2) comprises a shell (21), the shell (21) comprising a first end surface (211) arranged along the first direction (Y) corresponding to the opening (111), the first end surface (211) also having a liquid inlet (2111) and a liquid outlet (2112), and the cooling pipeline (18) is also connected to the liquid inlet (2111) and the liquid outlet (2112).

10. The battery pack according to claim 9, characterized in that: The cooling pipeline (18) comprises: a water inlet pipeline (181), comprising a first fixed pipeline (1811) and a first movable pipeline (1812); the first fixed pipeline (1811) is arranged in the chamber (114) on one side of the battery module (2) along the second direction (X); the water inlet pipeline (181) is connected to the water inlet (112); the first movable pipeline (1812) extends along the second direction (X); the first movable pipeline (1812) is detachably connected to the first fixed pipeline (1811); and in the first direction (Y), the first movable pipeline (1812) is arranged between the battery module (2) and the opening (111); The water outlet pipeline (182) comprises a second fixed pipeline (1821) and a second movable pipeline (1822); the second fixed pipeline (1821) is arranged in the chamber (114) on one side of the battery module (2) along the second direction (X); the second fixed pipeline (1821) is connected to the water outlet (113); the second movable pipeline (1822) extends along the second direction (X); the second movable pipeline (1822) is detachably connected to the second fixed pipeline (1821); and in the first direction (Y), the second movable pipeline (1822) is arranged between the battery module (2) and the opening (111).

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