Box body edge beam mounting structure, battery box, battery pack and electric equipment

Abstract

The utility model discloses a box body edge beam mounting structure, a battery box, a battery pack and electric equipment. The box body edge beam mounting structure comprises a first mounting piece, a second mounting piece and a third mounting piece, the first mounting piece comprises a first mounting plate and a first connecting plate, the second mounting piece comprises a second mounting plate and a second connecting plate, and the third mounting piece is located between the first mounting piece and the second mounting piece and comprises a third mounting plate and a third connecting plate. The three mounting plates are fixedly connected through connecting pieces, and the three connecting plates are welded to the box body edge beams respectively. The box body edge beam mounting structure is high in compressive strength, has a good buffering effect, can effectively reduce impact force transmitted from the edge beam to a battery in the box body, reduces safety problems such as short circuit, fire and explosion in the impact process of a battery pack, and improves the use safety of electric equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a box side beam structure, a battery box and a battery pack. Background Art

[0002] With the rapid development of the new energy battery industry, the safety requirements for batteries are getting higher and higher. During the long-term use of the battery pack of an electric vehicle, the connection strength and anti-collision impact strength between the battery pack and the whole vehicle are becoming more and more important. The connection strength and anti-collision impact strength of the battery pack are mainly ensured by the external mounting structure and side beam of the battery box. Therefore, the strength of the mounting structure of the battery pack is particularly important.

[0003] In the existing conventional roll-formed box for installing batteries, its mounting structure mainly includes two upper and lower roll-formed mounting parts, and the two mounting parts are respectively welded to the box side beam. Due to the insufficient strength of the mounting parts, when the vehicle is impacted, the impact force generated by the impact is directly transmitted to the side beam through the mounting parts and enters the battery interior, and short circuits are extremely likely to occur inside the battery, and even cause the battery to catch fire and explode.

[0004] Therefore, how to strengthen the strength of the mounting structure to reduce the damage caused by the impact on the battery pack during vehicle collision is extremely important. Summary of the Utility Model

[0005] The purpose of the embodiments of the utility model is to provide a box side beam mounting structure, a battery box, a battery pack and an electrical equipment. The box side beam mounting structure has high compressive strength and a buffering effect, can effectively reduce the impact force transmitted from the side beam to the battery inside the box, reduce safety problems such as short circuits, fires and explosions during the impact of the battery pack, and improve the use safety of the electrical equipment.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] On the one hand, a box side beam mounting structure is provided, including a first mounting part, a second mounting part and a third mounting part.

[0008] The first mounting part includes a first mounting plate and a first connecting plate connected to each other. The second mounting part includes a second mounting plate and a second connecting plate connected to each other. It is characterized in that a third mounting part is further included. The third mounting part is located between the first mounting part and the second mounting part. And the third mounting part includes a third mounting plate and a third connecting plate connected to each other. The first mounting plate, the second mounting plate and the third mounting plate are fixedly connected through a connecting piece. One end of the first connecting plate away from the first mounting plate, one end of the second connecting plate away from the third mounting plate and one end of the third connecting plate away from the third mounting plate are respectively welded to the box side beam.

[0009] As a further solution for the mounting structure of the box body side beam, the length of the side beam extends along the x direction. The first mounting plate has a horizontally arranged first mounting plate body and a plurality of first convex portions that are convex on the surface of the first mounting plate body through rolling. The length of the first mounting plate body extends along the x direction to near both ends of the side beam, and the plurality of first convex portions are evenly spaced along the x direction;

[0010] The second mounting plate has a horizontally arranged second mounting plate body and a plurality of first concave portions that are concave on the surface of the second mounting plate body through rolling. The length of the second mounting plate body extends along the x direction to near both ends of the side beam, and the plurality of first concave portions are evenly spaced along the x direction;

[0011] The third mounting plate has a horizontally arranged third mounting plate body and a plurality of second concave portions that are concave on the surface of the third mounting plate body through rolling. The length of the third mounting plate body extends along the x direction to near both ends of the side beam, and the plurality of second concave portions are evenly spaced along the x direction;

[0012] The first mounting plate body, the second mounting plate body, and the third mounting plate body are closely attached to each other. The first concave portions and the second concave portions are in one-to-one correspondence and are closely attached and face the first convex portions. The first convex portions, the first concave portions, and the second concave portions are fixedly connected through the connecting members.

[0013] As a further solution for the mounting structure of the box body side beam, the first mounting plate further has a plurality of second convex portions that are convex on the surface of the first mounting plate body through rolling. The plurality of second convex portions are spaced along the x direction, and there are several second convex portions between every two adjacent first convex portions;

[0014] The second mounting plate has a plurality of third concave portions that are concave on the surface of the second mounting plate body through rolling. The plurality of third concave portions are spaced along the x direction, and there are several third concave portions between every two adjacent first concave portions;

[0015] The third mounting plate has a plurality of fourth concave portions that are concave on the surface of the third mounting plate body through rolling. The plurality of fourth concave portions are spaced along the x direction, and there are several fourth concave portions between every two adjacent second concave portions;

[0016] The third concave portions and the fourth concave portions are in one-to-one correspondence and are closely attached and face the second convex portions.

[0017] As a further solution for the mounting structure of the box body side beam, the first connecting plate includes a first connecting plate body and a first transition part connected to each other. One end of the first transition part away from the first connecting plate body is connected to the first mounting plate. One end of the first transition part away from the first mounting plate is inclined upward in a direction away from the first mounting plate. The first connecting plate body is fixedly welded to the outer side surface of the side beam, and the first connecting plate body is parallel to the outer side surface of the side beam;

[0018] The second connecting plate includes a second connecting plate body and a second transition part connected to each other. One end of the second transition part away from the second connecting plate body is connected to the second mounting plate. One end of the second transition part away from the second mounting plate is inclined downward in a direction away from the second mounting plate. The second connecting plate body is welded to the bottom surface of the side beam, and the second connecting plate body is parallel to the bottom surface of the side beam;

[0019] The third connecting plate includes a third connecting plate body and a third transition part connected to each other. One end of the third transition part away from the third connecting plate body is connected to the third mounting plate. The third connecting plate body is fixedly welded to the outer side surface of the side beam, and the third connecting plate body is parallel to the outer side surface of the side beam.

[0020] As a further solution for the mounting structure of the box body side beam, the first connecting plate body has a first buffer part and a plurality of first welding parts that are recessed towards the inner side of the outer side surface of the side beam on the surface of the first buffer part by rolling. The first buffer part is spaced from the outer side surface of the side beam. The first welding parts are in close contact with the outer side surface of the side beam and are welded to the outer side surface of the side beam.

[0021] As a further solution for the mounting structure of the box body side beam, the thickness of the second connecting plate body extends in the z direction perpendicular to the x direction. The second connecting plate body is provided with a plurality of through holes along the z direction, and the plurality of through holes are evenly distributed along the x direction. The welding points of the second connecting plate body and the bottom surface of the side beam are located at the through holes;

[0022] The second transition part has a third buffer part and a first abutting part that is recessed towards the inner side of the outer side surface of the side beam on the surface of the third buffer part by rolling, and a fourth buffer part that is convex outward by rolling away from the outer side surface of the side beam. The first abutting part corresponds to the second concave part one by one.

[0023] As a further solution for the mounting structure of the side beam of the box body, the outer side surface of the side beam has a step with a length extending along the x direction. The third connecting plate further includes a second abutting portion. The main body of the third connecting plate is connected to the third transition portion through the second abutting portion. One end of the third transition portion away from the third mounting plate is inclined downward toward the direction close to the outer side surface of the side beam. The second abutting portion closely adheres to the upper surface of the step along the z direction, and the z direction is perpendicular to the x direction.

[0024] On the other hand, a battery box is provided, which includes a box body. The box body includes a bottom guard plate and side beams located on one side of the bottom guard plate and perpendicularly connected to the four sides of the bottom guard plate. The four side beams are sequentially connected. The battery box further includes the above-mentioned mounting structure of the box body side beam, and one of the mounting structures of the box body side beam is respectively installed on the outer sides of two opposite side beams.

[0025] On yet another aspect, a battery pack is provided, which includes a battery and the above-mentioned battery box, and the battery is installed in the battery box.

[0026] On still another aspect, an electrical equipment is provided, which is installed with the above-mentioned battery pack.

[0027] Beneficial effects: By arranging a third mounting member between the first mounting member and the second mounting member, and extending the lengths of the first mounting member, the second mounting member, and the third mounting member to both ends in the length direction close to the welded side beam, after the first mounting plate, the second mounting plate, and the third mounting plate are respectively welded and fixed to the side beam, the compressive strength of the mounting structure of the box body side beam can be effectively improved.

[0028] Compared with the prior art, the connection stability between the mounting structure of the box body side beam of the present invention and the side beam of the box body is higher.

[0029] The battery pack can be mounted on an electrical equipment such as a new energy vehicle through the sleeve of the mounting structure of the box body side beam outside the battery box. When the vehicle body of the new energy vehicle is impacted by an external force, the mounting structure of the box body side beam can play a good buffering role. The impact force is transmitted to the side beam through the structurally strengthened mounting structure of the box body side beam. Since the mounting structure of the box body side beam has a high enough compressive strength and buffering effect, it can effectively reduce the impact force transmitted from the side beam to the battery in the box body, and reduce safety problems such as short circuit, fire, and explosion during the impact of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0031] Figure 1 It is a schematic structural diagram after the connection between the mounting structure of the box body side beam and the side beam according to the embodiment of the present invention.

[0032] Figure 2 The side view schematic diagram after the box side beam mounting structure described in the embodiment of the present utility model is connected to the side beam.

[0033] Figure 3 The structural schematic diagram of the first mounting member described in the embodiment of the present utility model.

[0034] Figure 4 The structural schematic diagram of the second mounting member described in the embodiment of the present utility model.

[0035] Figure 5 The structural schematic diagram of the third mounting member described in the embodiment of the present utility model.

[0036] Figure 6 The structural schematic diagram of the battery box described in the embodiment of the present utility model.

[0037] In the figure:

[0038] 1. Box body; 11. Bottom guard plate; 12. Side beam; 13. Step;

[0039] 2. Box body side beam mounting structure;

[0040] 100. First mounting member; 110. First mounting plate; 111. First mounting plate body; 112. First upper convex part; 113. Second upper convex part; 120. First connecting plate; 121. First connecting plate body; 1211. First buffer part; 1212. First welding part; 1213. Second buffer part; 122. First transition part;

[0041] 200. Second mounting member; 210. Second mounting plate; 211. Second mounting plate body; 212. First lower concave part; 213. Third lower concave part; 220. Second connecting plate; 221. Second connecting plate body; 222. Second transition part; 2221. Third buffer part; 2222. First abutting part; 2223. Fourth buffer part; 223. Through hole;

[0042] 300. Third mounting member; 310. Third mounting plate; 311. Third mounting plate body; 312. Second lower concave part; 313. Fourth lower concave part; 320. Third connecting plate; 321. Third connecting plate body; 322. Third transition part; 323. Second abutting part;

[0043] 400. Connecting piece. Specific embodiments

[0044] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present utility model clearer, the technical solutions of the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0045] As Figure 1 and Figure 2 shown, the side beam mounting structure 2 of the box body in this embodiment includes a first mounting member 100, a second mounting member 200, and a third mounting member 300. The third mounting member 300 is located between the first mounting member 100 and the second mounting member 200.

[0046] Among them, the first mounting member 100 includes a first mounting plate 110 and a first connecting plate 120 connected to each other. The second mounting member 200 includes a second mounting plate 210 and a second connecting plate 220 connected to each other. The third mounting member 300 includes a third mounting plate 310 and a third connecting plate 320 connected to each other. The first mounting plate 110, the second mounting plate 210, and the third mounting plate 310 are fixedly connected through a connecting member 400. One end of the first connecting plate 120 away from the first mounting plate 110, one end of the second connecting plate 220 away from the third mounting plate 310, and one end of the third connecting plate 320 away from the third mounting plate 310 are respectively welded to the side beam 12 of the box body 1.

[0047] It should be noted that Figure 1 in, the coordinates x, y, and z are perpendicular to each other. The x - coordinate direction is the length direction of the side beam 12, that is, the length of the side beam 12 extends along the x - direction. The side beam mounting structure 2 of the box body is located on one side of the side beam 12 along the y - direction. The first mounting plate 110, the third mounting plate 310, and the second mounting plate 210 are distributed in sequence along the z - direction.

[0048] In this embodiment, by arranging the third mounting member 300 between the first mounting member 100 and the second mounting member 200, the first connecting plate 120, the second connecting plate 220, and the third connecting plate 320 are fixedly connected through the connecting member 400, and the first mounting plate 110, the second mounting plate 210, and the third mounting plate 310 are respectively welded and fixed to the side beam 12. On the one hand, when subjected to external force impact, the setting of the third mounting plate 310 can make the oscillation of the force - receiving surface transmitted to the side beam 12 more uniform, preventing the box body 1 from being damaged due to excessive impact force in a local area. On the other hand, the strength of the side beam mounting structure 2 of the box body is improved, and the load - bearing strength of the box body can be increased. Therefore, by adding the third mounting member 300 in this embodiment, the compressive strength and load - bearing strength of the side beam mounting structure 2 of the box body can be effectively improved.

[0049] Optionally, any two of the first mounting plate 110, the second mounting plate 210, and the third mounting plate 310 are in close contact with each other. Of course, in other embodiments, the three mounting plates can also be designed to be spaced apart from top to bottom.

[0050] Next, taking the close contact between the second mounting plate 210 and the third mounting plate 310 as an example, the box girder mounting structure 2 will be further described in detail.

[0051] Furthermore, as Figure 3 shown, the first mounting plate 110 has a horizontally arranged first mounting plate body 111 and a plurality of first convex portions 112 that are convex on the surface of the first mounting plate body 111 by rolling. The length of the first mounting plate body 111 extends along the x direction to both ends close to the side beam 12, and the plurality of first convex portions 112 are evenly distributed at intervals along the x direction;

[0052] As Figure 4 shown, the second mounting plate 210 has a horizontally arranged second mounting plate body 211 and a plurality of first concave portions 212 that are concave on the surface of the second mounting plate body 211 by rolling. The length of the second mounting plate body 211 extends along the x direction to both ends close to the side beam 12, and the plurality of first concave portions 212 are evenly distributed at intervals along the x direction;

[0053] As Figure 5 shown, the third mounting plate 310 has a horizontally arranged third mounting plate body 311 and a plurality of second concave portions 312 that are concave on the surface of the third mounting plate body 311 by rolling. The length of the third mounting plate body 311 extends along the x direction to both ends close to the side beam 12, and the plurality of second concave portions 312 are evenly distributed at intervals along the x direction;

[0054] The first mounting plate body 111, the second mounting plate body 211, and the third mounting plate body 311 are in close contact, and the first concave portions 212 and the second concave portions 312 are in one-to-one correspondence and in close contact and face the first convex portions 112. The first convex portions 112, the first concave portions 212, and the second concave portions 312 are fixedly connected by a connecting member 400.

[0055] In this embodiment, the first concave portions 212 and the second concave portions 312 are in close contact and face the first convex portions 112, which can improve the compressive strength and load strength of the box girder mounting structure 2 more than other combination methods.

[0056] Specifically, the first mounting plate 110 and the second mounting plate 210 are completely symmetric with respect to the central plane between them.

[0057] Among them, each first upward convex portion 112, first downward concave portion 212, and second downward concave portion 312 are respectively provided with a connection hole. The connecting member 400 is a sleeve. The sleeve sequentially passes through the three connection holes and is respectively welded and fixed to the first upward convex portion 112, first downward concave portion 212, and second downward concave portion 312. Specifically, the connection hole is circular, the sleeve is of a cylindrical structure. After the sleeve is sequentially inserted into the three connection holes, the upper end of the sleeve protrudes from the upper surface of the first upward convex portion 112, and the lower end of the sleeve protrudes from the lower surface of the second downward concave portion 312. The upper and lower side surfaces of the first upward convex portion 112 are respectively welded and fixed to the outer wall of the sleeve, and the upper surface of the first downward concave portion 212 and the lower surface of the second downward concave portion 312 are respectively welded and fixed to the outer wall of the sleeve.

[0058] Further, the first mounting plate 110 further has a plurality of second upward convex portions 113 that are convex upward from the surface of the first mounting plate body 111 by rolling. The plurality of second upward convex portions 113 are spaced apart along the x direction, and there are several second upward convex portions 113 between every two adjacent first upward convex portions 112;

[0059] The second mounting plate 210 has a plurality of third downward concave portions 213 that are concave downward from the surface of the second mounting plate body 211 by rolling. The plurality of third downward concave portions 213 are spaced apart along the x direction, and there are several third downward concave portions 213 between every two adjacent first downward concave portions 212;

[0060] The third mounting plate 310 has a plurality of fourth downward concave portions 313 that are concave downward from the surface of the third mounting plate body 311 by rolling. The plurality of fourth downward concave portions 313 are spaced apart along the x direction, and there are several fourth downward concave portions 313 between every two adjacent second downward concave portions 312;

[0061] The third downward concave portions 213 and the fourth downward concave portions 313 are in one-to-one correspondence, closely attached and facing the second upward convex portions 113.

[0062] In this embodiment, by rolling, a plurality of second upward convex portions 113 are formed on the surface of the second mounting plate body 211, a plurality of third downward concave portions 213 are formed on the surface of the second mounting plate body 211, and a plurality of fourth downward concave portions 313 are formed on the surface of the third mounting plate body 311. Compared with the close attachment in a completely flat state, the compressive strength of the box girder mounting structure 2 can be further improved.

[0063] Further, as Figure 3As shown, there is a second upward convex portion 113 between some adjacent two first upward convex portions 112, and there are three second upward convex portions 113 between some adjacent two first upward convex portions 112. When there are three second upward convex portions 113 between two adjacent first upward convex portions 112, the width of the middle second upward convex portion 113 is greater than the widths of the second upward convex portions 113 on both sides, and the second upward convex portions 113 on both sides are symmetric with respect to the middle second upward convex portion 113. Since the second mounting plate 210 is completely symmetric with the first mounting plate 110, and the shape of the third mounting plate 310 is the same as that of the second mounting plate 210 and is closely attached to the upper surface of the second mounting plate 210, therefore, the specific structures of the concave portions corresponding to the second upward convex portions 113 on the second mounting plate 210 and the third mounting plate 310 will not be elaborated herein.

[0064] Furthermore, the first connecting plate 120 includes a connected first connecting plate body 121 and a first transition portion 122. One end of the first transition portion 122 far from the first connecting plate body 121 is connected to the first mounting plate 110. One end of the first transition portion 122 far from the first mounting plate 110 is inclined upward in a direction away from the first mounting plate 110. The first connecting plate body 121 is welded and fixed to the outer side surface of the side beam 12, and the first connecting plate body 121 is parallel to the outer side surface of the side beam 12;

[0065] The second connecting plate 220 includes a connected second connecting plate body 221 and a second transition portion 222. One end of the second transition portion 222 far from the second connecting plate body 221 is connected to the second mounting plate 210. One end of the second transition portion 222 far from the second mounting plate 210 is inclined downward in a direction away from the second mounting plate 210. The second connecting plate body 221 is welded to the bottom surface of the side beam 12, and the second connecting plate body 221 is parallel to the bottom surface of the side beam 12;

[0066] The third connecting plate 320 includes a connected third connecting plate body 321 and a third transition portion 322. One end of the third transition portion 322 far from the third connecting plate body 321 is connected to the third mounting plate 310. The third connecting plate body 321 is welded and fixed to the outer side surface of the side beam 12, and the third connecting plate body 321 is parallel to the outer side surface of the side beam 12.

[0067] In this embodiment, designing the first connecting plate body 121 and the third connecting plate body 321 to be closely attached to the outer side surface of the side beam 12 and designing the second connecting plate body 221 to be closely attached to the bottom surface of the side beam 12 and welding them to the side beam 12 respectively can, to a certain extent, improve the compressive strength of the box body side beam mounting structure 2.

[0068] Furthermore, as Figure 3As shown, the first connecting plate body 121 has a first buffer portion 1211 and a plurality of first welding portions 1212 that are recessed toward the outer side surface of the side beam 12 on the surface of the first buffer portion 1211 by rolling. The first buffer portion 1211 is spaced from the outer side surface of the side beam 12, and the first welding portions 1212 are in close contact with the outer side surface of the side beam 12 and are welded to the outer side surface of the side beam 12.

[0069] Since welding fixation is usually carried out by spot welding, in this embodiment, a plurality of first welding portions 1212 that are recessed toward the outer side surface of the side beam 12 are formed on the surface of the first buffer portion 1211 by rolling. It is only necessary to weld the first welding portions 1212 to the side beam 12. The first buffer portion 1211 is spaced from the side beam 12. When an electrical device, such as a vehicle body, is impacted by an external force, the first buffer portion 1211 can provide a certain buffering effect.

[0070] Among them, the first welding portions 1212 correspond to the first convex portions 112 one by one, that is, the first welding portions 1212 and the first convex portions 112 are respectively located at opposite ends of the first transition portion 122.

[0071] In order to further improve the buffering effect of the box side beam mounting structure 2, in this embodiment, a plurality of second buffer portions 1213 are also formed on the surface of the first buffer portion 1211 by rolling. Specifically, the second buffer portions 1213 are rolled to protrude from the surface of the first buffer portion 1211 away from the outer side surface of the side beam 12.

[0072] Furthermore, the thickness of the second connecting plate body 221 extends in the z direction perpendicular to the x direction. The second connecting plate body 221 is provided with a plurality of through holes 223 along the z direction, and the plurality of through holes 223 are evenly distributed along the x direction. The welding points of the second connecting plate body 221 and the bottom surface of the side beam 12 are located at the through holes 223. Specifically, the through holes 223 are waist-shaped holes, and the length of the waist-shaped holes is consistent with the length direction (x direction) of the second connecting plate body 221. The two opposite inner walls of the waist-shaped holes along their width direction (y direction) are respectively welded to the bottom surface of the side beam 12. Compared with the conventional welding method in which the end of the connecting plate is welded to the side beam 12, the welding method of this embodiment can double the connection strength between the second connecting plate 220 and the side beam 12.

[0073] As Figure 4 shown, the second transition portion 222 has a third buffer portion 2221, a first abutting portion 2222 that is recessed toward the outer side surface of the side beam 12 on the surface of the third buffer portion 2221 by rolling, and a fourth buffer portion 2223 that is rolled to protrude away from the outer side surface of the side beam 12. The first abutting portion 2222 corresponds to the first concave portion 212 one by one.

[0074] Since the load points of the battery pack and the box body 1 mainly exist in the sleeves (connecting members 400), and the sleeves are welded to the second concave portion 312, in this embodiment, the positions of the first abutting portions 2222 are designed to correspond one-to-one with the second concave portion 312. By abutting the first abutting portions 2222 against the side beams 12, the strength of the box body side beam mounting structure 2 can be improved. The third buffer portion 2221 and the fourth buffer portion 2223 are respectively spaced a certain distance from the side beam 12, and the spacing distances between the third buffer portion 2221 and the side beam 12 and between the fourth buffer portion 2223 and the side beam 12 are inconsistent, which can achieve a multiple buffering effect.

[0075] As Figure 5 shown, the outer side surface of the side beam 12 has a step 13 extending in the x direction. The third connecting plate 320 further includes a second abutting portion 323. The third connecting plate body 321 is connected to the third transition portion 322 through the second abutting portion 323. One end of the third transition portion 322 far from the third mounting plate 310 is inclined downward toward the direction close to the outer side surface of the side beam 12, and the second abutting portion 323 abuts against the upper surface of the step 13.

[0076] Among them, the third connecting plate body 321 abuts against and is welded to the outer side surface of the side beam 12, the second abutting portion 323 abuts against the upper surface of the step 13 of the side beam 12 in the z direction, and the step 13 can provide a certain supporting effect on the third connecting plate 320.

[0077] This embodiment also provides a battery box. As Figure 6 shown, the battery box includes a box body 1. The box body 1 includes a bottom guard plate 11 and side beams 12 located on one side of the bottom guard plate 11 and vertically connected to the four sides of the bottom guard plate 11. The four side beams 12 are connected in sequence. The battery box further includes the box body side beam mounting structure 2 described in the above embodiment. One box body side beam mounting structure 2 is respectively installed on the outer sides of two opposite side beams 12.

[0078] Further, the side beam 12 for installing the box body side beam mounting structure 2 is of an L-shaped structure. The L-shaped side beam 12 is formed by roll forming, that is, the outer side of the side beam 12 has a step 13. The first mounting member 100 of the box body side beam mounting structure 2 is welded and fixed to the side beam 12 adjacent to its upper end. The second mounting member 200 abuts against both the upper surface of the step 13 and the outer side surface of the side beam 12 at the same time, and the second mounting member 200 is welded and fixed to the outer side surface of the side beam 12. The third mounting member 300 abuts against both the outer side surface of the step 13 and the bottom surface of the side beam 12 at the same time, and the third mounting member 300 is welded and fixed to the bottom surface of the side beam 12.

[0079] This embodiment also provides a battery pack, including a battery and the battery box described in the above embodiment. The battery is installed in the battery box.

[0080] This embodiment also provides an electrical device, and the above battery pack is installed on the electrical device.

[0081] In this embodiment, the battery pack can be mounted on an electrical device such as a new energy vehicle through the sleeve of the box side beam mounting structure 2 outside the battery box. When the vehicle body of the new energy vehicle is impacted by an external force, the box side beam mounting structure 2 can play a good buffering role, and the impact force is transmitted to the side beam 12 through the box side beam mounting structure 2 with enhanced structure. Since the box side beam mounting structure 2 has a sufficiently high compressive strength and buffering effect, it can effectively reduce the impact force transmitted from the side beam 12 to the battery in the box 1, and reduce safety problems such as short circuit, fire and explosion during the impact of the battery pack.

[0082] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A box side beam mounting structure, comprising a first mounting member and a second mounting member, wherein the first mounting member comprises a first mounting plate and a first connecting plate connected to each other, and the second mounting member comprises a second mounting plate and a second connecting plate connected to each other, characterized in that: It also includes a third mounting member, which is located between the first mounting member and the second mounting member, and the third mounting member includes a third mounting plate and a third connecting plate connected to each other, the first mounting plate, the second mounting plate and the third mounting plate are fixedly connected by a connecting member, and one end of the first connecting plate away from the first mounting plate, one end of the second connecting plate away from the third mounting plate, and one end of the third connecting plate away from the third mounting plate are respectively welded to the side beams of the box body.

2. The box side beam mounting structure according to claim 1, characterized in that: The length of the side beam extends along the x-direction, the first mounting plate comprises a first mounting plate body arranged horizontally and a plurality of first upper protrusions protruding from the surface of the first mounting plate body by rolling, the length of the first mounting plate body extends along the x-direction to the ends close to the side beam, and the plurality of first upper protrusions are evenly spaced along the x-direction; The second mounting plate comprises a second mounting plate body arranged horizontally and a plurality of first concave portions which are concave on the surface of the second mounting plate body by rolling, the length of the second mounting plate body extends along the x-direction to two ends close to the edge beam, and the plurality of first concave portions are evenly spaced along the x-direction; The third mounting plate comprises a third mounting plate body arranged horizontally and a plurality of second recessed portions recessed on the surface of the third mounting plate body by rolling, the length of the third mounting plate body extending along the x-direction to the two ends close to the side beam, and the plurality of second recessed portions are evenly spaced along the x-direction; The first mounting plate body, the second mounting plate body and the third mounting plate body are tightly attached to each other, the first recessed portion and the second recessed portion correspond to each other tightly to each other and face the first convex portion, and the first convex portion, the first recessed portion and the second recessed portion are fixedly connected by the connecting member.

3. The box side beam mounting structure according to claim 2, characterized in that: The first mounting plate further has a plurality of second upper protrusions raised on the surface of the first mounting plate body by rolling, the plurality of second upper protrusions are spaced apart along the x direction, and a plurality of the second upper protrusions are disposed between every two adjacent first upper protrusions; The second mounting plate has a plurality of third recessed portions recessed on the surface of the second mounting plate body by rolling, the plurality of third recessed portions are spaced apart along the x direction, and a plurality of the third recessed portions are disposed between every two adjacent first recessed portions; The third mounting plate has a plurality of fourth recessed portions recessed on the surface of the third mounting plate body by rolling, the plurality of fourth recessed portions are spaced apart along the x direction, and a plurality of the fourth recessed portions are disposed between every two adjacent second recessed portions; The third concave portion and the fourth concave portion correspond to each other closely and face the second convex portion.

4. The box side beam mounting structure according to claim 2 or 3, characterized in that: The first connecting plate comprises a first connecting plate body and a first transition portion connected to each other, one end of the first transition portion away from the first connecting plate body is connected to the first mounting plate, one end of the first transition portion away from the first mounting plate is inclined upward in a direction away from the first mounting plate, the first connecting plate body is welded and fixed to the outer side surface of the side beam, and the first connecting plate body is parallel to the outer side surface of the side beam; The second connecting plate comprises a second connecting plate body and a second transition portion connected to each other, one end of the second transition portion away from the second connecting plate body is connected to the second mounting plate, one end of the second transition portion away from the second mounting plate is inclined downward in a direction away from the second mounting plate, the second connecting plate body is welded to the bottom surface of the side beam, and the second connecting plate body is parallel to the bottom surface of the side beam; The third connecting plate includes a third connecting plate body and a third transition portion that are connected to each other. An end of the third transition portion that is away from the third connecting plate body is connected to the third mounting plate. The third connecting plate body is welded and fixed to the outer side surface of the side beam, and the third connecting plate body is parallel to the outer side surface of the side beam.

5. The box side beam mounting structure according to claim 4, characterized in that: The first connecting plate body has a first buffer portion and a plurality of first welding portions which are recessed on the surface of the first buffer portion by rolling toward the outer side surface of the side beam, the first buffer portion is spaced apart from the outer side surface of the side beam, and the first welding portions are closely attached to and welded to the outer side surface of the side beam.

6. The box side beam mounting structure according to claim 4, characterized in that: The thickness of the second connecting plate body extends along the z direction perpendicular to the x direction, the second connecting plate body is penetrated by a plurality of through holes along the z direction, the plurality of through holes are evenly distributed along the x direction, and the welding point between the second connecting plate body and the bottom surface of the edge beam is located at the through hole; The second transition portion comprises a third buffer portion and a first abutment portion which is concave inwardly on the surface of the third buffer portion by rolling toward the outer side surface close to the side beam, and a fourth buffer portion which is convex outwardly on the outer side surface away from the side beam by rolling, and the first abutment portion corresponds one-to-one to the second concave portion.

7. The box side beam mounting structure according to claim 4, characterized in that: The outer side surface of the side beam has a step whose length extends along the x-direction, and the third connecting plate also includes a second abutment portion. The third connecting plate body is connected to the third transition portion via the second abutment portion, and the third transition portion is inclined downward toward the direction close to the outer side surface of the side beam at one end away from the third mounting plate, and the second abutment portion is tightly attached to the upper surface of the step along the z-direction, and the z-direction is perpendicular to the x-direction.

8. A battery box, comprising a box body, the box body comprising a bottom guard plate and a side beam located on one side of the bottom guard plate and vertically connected to the periphery of the bottom guard plate, the four side beams being connected in sequence, characterized in that: The battery box also includes the box side beam mounting structure as described in any one of claims 1 to 7, and one of the box side beam mounting structures is respectively installed on the outer sides of the two opposite side beams.

9. A battery pack, characterized in that: The invention comprises a battery and a battery box as claimed in claim 8, wherein the battery is installed in the battery box.

10. An electrical device, characterized in that: The battery pack as claimed in claim 9 is installed.

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