Rolling beam, bottom cross beam and energy storage battery rack cross beam assembly

Abstract

The utility model discloses a rolling beam, a bottom cross beam and an energy storage battery rack cross beam assembly, the rolling beam comprises a first beam body and a plurality of rolling devices, the plurality of rolling devices are arranged along the length direction of the first beam body, and each rolling device comprises a rolling shaft; the bottom cross beam comprises a second beam body and a plurality of clamping grooves, and the clamping grooves are formed in the length direction of the second beam body; the rolling device of the rolling beam can support the rolling beam to slide on the bottom cross beam, a gap is formed between the bottom face of the rolling beam and the supporting face of the bottom cross beam in the sliding process, when the rolling beam slides to a preset position, the rolling shaft of the rolling device is clamped with the clamping groove, and the bottom face of the rolling beam makes contact with the supporting face of the bottom cross beam. The rolling beam is arranged at the bottom of the battery pack, the bottom cross beam is arranged in the energy storage device, the rolling beam can slide on the bottom cross beam, friction resistance is reduced, the battery pack can be conveniently disassembled and assembled in the energy storage device, the rolling beam forms a large supporting area for the battery pack, and damage to the structure of the battery pack is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of energy storage battery more particularly, a kind of rolling beam, bottom crossbeam, energy storage battery rack crossbeam subassembly. BACKGROUND

[0002] With the vigorous promotion of the state to energy storage, electrochemical energy storage field gradually becomes mainstream trend, and energy storage device is increasingly widely used.In energy storage device, energy storage battery pack is installed on multilayer battery rack, wherein, battery rack is usually composed of crossbeam and stringer, stringer is vertically fixed, crossbeam is fixedly arranged on stringer, and crossbeam supports energy storage battery pack.

[0003] At present, when battery pack is put into rack, special tool is used to place battery pack on slide on both sides of battery rack, and then battery pack on slide is pushed into inside of battery rack;But during later maintenance, once special tool cannot be in place, due to the volume and weight of single battery pack are larger, frictional resistance is larger when pushing and pulling, and it is time-consuming and laborious.And for battery pack using water-cooled plate, direct pushing and pulling can damage water-cooled plate insulating paint, and accelerate electrochemical corrosion of water-cooled plate during later use.

[0004] Some set several rollers on both sides of crossbeam of battery rack, when battery pack is pushed and pulled on battery rack, roller can effectively reduce friction, so that pushing and pulling operation of battery pack is more labor-saving.The mode is always in the state of surface and line contact between battery pack and roller, and the weight of battery pack is always concentrated on crossbeam through roller, which leaves hidden danger in fixing battery pack.And the components in contact with roller are prone to stress concentration and structural deformation when the weight of battery pack is concentrated on roller for a long time.

[0005] Therefore, it is necessary to provide an energy storage rolling beam, bottom crossbeam and battery rack crossbeam subassembly to at least partially solve the above problems. SUMMARY

[0006] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the specific embodiment section.The summary section of the utility model does not mean to try to limit the key features and necessary technical features of the claimed technical solution, and does not mean to try to determine the protection scope of the claimed technical solution.

[0007] To at least partially solve the above problems, the first aspect of the utility model provides a rolling beam, comprising:

[0008] First beam body;

[0009] A plurality of rolling devices are arranged along the length direction of the first beam body, and the rolling device comprises a rolling shaft.

[0010] The rolling shaft comprises a first shaft section located in the middle of the rolling shaft, and a part of the circumferential surface of the first shaft section can protrude from the bottom of the rolling device, and the axial length of the first shaft section of the plurality of rolling devices increases from the first end to the second end of the first beam body.

[0011] Optionally, the spacing between the plurality of rolling devices increases sequentially from the first end to the second end of the first beam body.

[0012] Optionally, the first beam body comprises:

[0013] a bottom plate arranged in a first direction, and a part of the circumferential surface of the first shaft section can protrude from the bottom surface of the bottom plate, so as to be clamped into the clamping groove of the bottom cross beam;

[0014] a first side plate arranged in a second direction perpendicular to the first direction, and the first side plate is fixedly connected to the first side of the bottom plate;

[0015] a second side plate arranged in the second direction, and the second side plate is fixedly connected to the second side of the bottom plate;

[0016] a top plate arranged in the first direction, and the first side of the top plate is fixedly connected to the first side plate, and the second side of the top plate is fixedly connected to the second side plate.

[0017] Optionally, the rolling device comprises:

[0018] a positioning block adapted to be mounted between the first side plate and the second side plate, and the bottom of the positioning block is provided with a receiving groove;

[0019] the rolling shaft is arranged in the receiving groove and can rotate in the receiving groove, the axial direction of the rolling shaft is arranged in the first direction, and a part of the circumferential surface of the rolling shaft can protrude from the bottom of the positioning block.

[0020] Optionally, the bottom plate is provided with a plurality of limiting grooves in the length direction, and the positioning block is arranged in the limiting groove.

[0021] Optionally, the second side plate is provided with a plurality of second connecting holes, and the fifth bolt is arranged in the second connecting hole to connect the positioning block.

[0022] Optionally, the maximum diameter of the rolling shaft is smaller than the diameter of the receiving groove.

[0023] Optionally, the rolling device further comprises:

[0024] a first stop block arranged at the first end of the receiving groove for fixing the first end of the rolling shaft,

[0025] A second block is arranged at a second end of the accommodating groove, and is used for fixing a second end of the roller shaft.

[0026] Optionally, the rolling device further comprises:

[0027] A first bearing is arranged in the first block to support rotation of the first end of the roller shaft.

[0028] A second bearing is arranged in the second block to support rotation of the second end of the roller shaft.

[0029] Optionally, the first bearing and the second bearing are both sliding bearings.

[0030] Optionally, an axis of the accommodating groove is at a distance R from a bottom surface of the positioning block, a radius of the first bearing and the second bearing is r, and a maximum diameter of the roller shaft is φ1, and 0.5*φ1>R≥r.

[0031] Optionally, the roller shaft further comprises:

[0032] A second shaft segment is arranged at a first end of the first shaft segment.

[0033] A third shaft segment is arranged at a second end of the first shaft segment.

[0034] A diameter of the first shaft segment is φ1, and a diameter of the second shaft segment and the third shaft segment is φ2, and φ1>φ2.

[0035] Optionally, a length of the first shaft segment is d, a plurality of the rolling devices comprise at least three kinds of the roller shafts with different lengths d, and the at least three kinds of the roller shafts with different lengths d are arranged in an increasing manner from a first end to a second end of the rolling beam.

[0036] Optionally, a top plate of the rolling beam is provided with a plurality of first connecting holes, and bolts are arranged in the first connecting holes to connect the battery pack.

[0037] Optionally, a bottom plate of the rolling beam is provided with mounting holes corresponding to the first connecting holes, and a dismounting tool is arranged to dismount the bolts or nuts through the mounting holes.

[0038] Optionally, an end of the top plate of the rolling beam is provided with a bending part, and the bending part is used for limiting the battery pack.

[0039] The second aspect of the utility model provides a bottom cross beam, comprising:

[0040] A second beam body;

[0041] A plurality of clamping grooves are arranged along the length direction of the second beam body, and the lengths of the plurality of clamping grooves increase from the first end to the second end of the second beam body, and the clamping grooves are used to adapt to the rolling device of the rolling beam in any one of the above technical solutions.

[0042] Optionally, the bottom cross beam is provided with at least three clamping grooves of different lengths, and the lengths of the at least three clamping grooves increase from the first end to the second end of the bottom cross beam.

[0043] Optionally, the intervals between the plurality of clamping grooves increase in sequence from the first end to the second end of the second beam body.

[0044] Optionally, the second beam body comprises:

[0045] A bottom support plate is arranged along a first direction, the clamping grooves are arranged on the bottom support plate, and the top surface of the bottom support plate is the support surface of the bottom cross beam.

[0046] A side support plate is arranged along a second direction, the second direction is perpendicular to the first direction, and the side support plate is fixedly connected to the side of the bottom support plate.

[0047] Optionally, the bottom cross beam further comprises:

[0048] A guide block is fixedly connected to the side support plate or the bottom support plate, the horizontal cross section of the guide block is trapezoidal or arc-shaped, and the guide block is used to guide the sliding of the rolling beam.

[0049] Optionally, the clamping groove is provided with a slope on the side where the rolling shaft of the rolling beam enters.

[0050] The third aspect of the utility model provides a kind of energy storage battery rack cross beam assembly, comprising:

[0051] The rolling beam in any one of the above technical solutions;

[0052] The bottom cross beam in any one of the above technical solutions;

[0053] Wherein, the rolling device of the rolling beam can support the rolling beam to slide on the bottom cross beam, the bottom surface of the rolling beam and the support surface of the bottom cross beam have a gap during sliding, the rolling shaft of the rolling device is clamped with the clamping groove when the rolling beam slides to predetermined position, and the bottom surface of the rolling beam is in contact with the support surface of the bottom cross beam.

[0054] According to the rolling beam, the bottom cross beam and the energy storage battery rack cross beam assembly, the rolling beam is arranged at the bottom of the battery pack, the bottom cross beam is arranged in the energy storage device, the rolling beam can slide on the bottom cross beam, the frictional resistance is reduced, the battery pack is convenient to disassemble and assemble in the energy storage device, the rolling beam forms a large supporting area for the battery pack, and damage to the structure of the battery pack is effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0055] The following drawings for the embodiments of the present application are used herein as a part of the present application for understanding the present application. The embodiments of the present application and the description thereof shown in the drawings are used to explain the principles of the present application. In the drawings,

[0056] Figure 1 It is a perspective view of the battery pack according to a preferred embodiment of the present application, and only the water-cooled plate of the battery pack is shown in the drawing;

[0057] Figure 2 It is a perspective view of the rolling device according to a preferred embodiment of the present application; Figure 1 It is an enlarged view of the E part in the drawing;

[0058] Figure 3 It is a perspective view of the battery pack according to a preferred embodiment of the present application, and only the water-cooled plate of the battery pack is shown in the drawing;

[0059] Figure 4 It is a perspective view of the rolling device according to a preferred embodiment of the present application; Figure 3 It is an enlarged view of the G part in the drawing;

[0060] Figure 5 It is a perspective view of the rolling device according to a preferred embodiment of the present application;

[0061] Figure 6 It is a perspective view of the rolling beam according to a preferred embodiment of the present application;

[0062] Figure 7 It is a perspective view of the rolling device according to a preferred embodiment of the present application;

[0063] Figure 8 It is a left view of the rolling device according to a preferred embodiment of the present application;

[0064] Figure 9 It is a sectional view along the B-B in the drawing; Figure 8

[0065] Figure 10 ​A combined state perspective view of the bottom cross beam and the rolling beam according to the preferred embodiment of the present application;

[0066] Figure 11 A perspective view of the bottom cross beam according to the preferred embodiment of the present application;

[0067] Figure 12 A combined state front view of the bottom cross beam and the rolling beam according to the preferred embodiment of the present application;

[0068] Figure 13 A Figure 12 A sectional view along A-A;

[0069] Figure 14 A Figure 13 An enlarged view of F part.

[0070] Explanation of reference signs:

[0071] 10: first bottom cross beam 11: side support plate

[0072] 12: bottom support plate 13: guide block

[0073] 14: clamping groove 20: first rolling beam

[0074] 21: bottom plate 22: first side plate

[0075] 23: second side plate 24: top plate

[0076] 25: bent part 26: first connecting hole

[0077] 27: rolling device 271: positioning block

[0078] 272: accommodating groove 273: rolling shaft

[0079] 2731: first shaft section 2732: second shaft section

[0080] 2733: third shaft section 274: first stop block

[0081] 275: limiting protrusion 276: first bearing

[0082] 277: fifth bolt 278: second stop block

[0083] 279: second bearing 28: limiting groove

[0084] 29: second connecting hole 30: first bolt

[0085] 40: second bolt 50: second bottom cross beam

[0086] 60: second rolling beam 70: third bolt

[0087] 80: fourth bolt 90: mounting hole

[0088] 100: water-cooling plate DETAILED DESCRIPTION

[0089] In the following description, numerous specific details are set forth to provide a more thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without one or more of these details. In other instances, well-known features have not been described in order to avoid obscuring the present application.

[0090] For a thorough understanding of the present application, reference will be made to the following detailed description. It is appreciated that the following description is provided for the purpose of enabling those skilled in the art to better understand the present application and is not intended to limit the present application in any way. It is further understood that the concepts expressed herein are considered sufficient to convey the teachings of the present application to those skilled in the art. Obviously, the embodiments of the present application can be practiced without those special details.

[0091] The ordinal numbers such as "first" and "second" used in the present application are merely identifiers but do not have any other meaning, for example, a specific order. Also, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0092] It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and similar terms used in the present application are for illustrative purposes only and are not limiting.

[0093] The present application discloses a rolling beam, a bottom cross beam and an energy storage battery rack cross beam assembly.

[0094] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings.

[0095] As shown in Figure 1 , Figure 2 , Figure 3 In a preferred embodiment, an energy storage battery rack cross beam assembly includes a bottom cross beam and a rolling beam.

[0096] The first bottom cross beam 10 and the first rolling beam 20 form a cross beam assembly of the energy storage battery rack, and the second bottom cross beam 50 and the second rolling beam 60 form another cross beam assembly of the energy storage battery rack; the first rolling beam 20 and the second rolling beam 60 are arranged at the bottom of the battery pack, and the first bottom cross beam 10 and the second bottom cross beam 50 are arranged in the energy storage device.

[0097] Figure 1 、 Figure 3 The first bottom cross beam 10 and the second bottom cross beam 50 are arranged symmetrically at the bottom of the battery pack, and the first rolling beam 20 and the second rolling beam 60 are arranged symmetrically in the energy storage device. The first bottom cross beam 10 and the first rolling beam 20 are taken as examples for description, and the second bottom cross beam 50 and the second rolling beam 60 can be referred to the first bottom cross beam 10 and the first rolling beam 20.

[0098] In an embodiment, as shown in Figure 3 、 Figure 4 、 Figure 5 The first rolling beam 20 comprises a first beam body and a plurality of rolling devices 27.

[0099] The first beam body can be made of a metal pipe, for example, a rectangular pipe, and the length thereof is adapted to the length of the battery pack.

[0100] The plurality of rolling devices 27 are arranged along the length direction of the first beam body, and the length direction is the X-axis direction in the figure. The rolling device 27 comprises a rolling shaft 273.

[0101] The rolling shaft 273 comprises a first shaft section 2731, and the first shaft section 2731 is located at the middle of the rolling shaft 273. A part of the circumferential surface of the first shaft section 2731 can protrude from the bottom of the rolling device 27, and the axial length of the first shaft section 2731 of the plurality of rolling devices 27 increases from the first end to the second end of the first beam body.

[0102] By arranging the plurality of rolling devices 27 in the first beam body, the plurality of rolling devices 27 roll on the support surface of the first bottom cross beam 10, so that the whole battery pack moves in a plane during the advancing of the battery pack. By increasing the axial length of the first shaft section 2731 of the rolling shaft 273 from the first end to the second end of the first beam body, the rolling shaft 273 can be prevented from falling into the non-corresponding clamping groove 14 in advance during the advancing of the battery pack, so that the battery pack cannot be installed in place.

[0103] In an embodiment, as shown in Figure 3 The spacing between the plurality of rolling devices 27 increases from the first end to the second end of the first beam body. Correspondingly, the spacing between the plurality of clamping grooves 14 increases from the first end to the second end of the first bottom cross beam 10.

[0104] The first end of the first bottom cross beam 10 is the entering end of the first rolling beam 20, and the first rolling beam 20 slides into the first bottom cross beam 10 from the first end of the first bottom cross beam 10. By arranging the plurality of rolling devices 27 and the plurality of clamping grooves 14 in a non-equidistant manner, it can be ensured that all the rolling devices 27 are on the supporting surface of the first bottom cross beam 10 and do not fall into the clamping grooves 14 before the battery pack completely enters the designated position, thereby ensuring the smoothness of the entire battery pack advancing process.

[0105] In one embodiment, as shown in Figure 2 、 Figure 4 the first beam body includes a bottom plate 21, a first side plate 22, a second side plate 23, and a top plate 24.

[0106] The bottom plate 21 is arranged along a first direction, which is the Y-axis direction in the figure. A part of the circumferential surface of the first shaft section 2731 can protrude from the bottom surface of the bottom plate 21, so as to be capable of entering the clamping groove 14 of the first bottom cross beam 10 and achieving clamping with the clamping groove 14. The width of the bottom plate 21 is less than the width of the bottom supporting plate 12 of the first bottom cross beam 10, so that the first rolling beam 20 can be fully supported by the first bottom cross beam 10. The bottom surface of the bottom plate 21 is the bottom surface of the first rolling beam 20, which is a plane.

[0107] The first side plate 22 is arranged along a second direction, which is the Z-axis direction in the figure. The first side plate 22 is fixedly connected to the first side of the bottom plate 21, and is close to the side supporting plate 11 of the first bottom cross beam 10.

[0108] The second side plate 23 is arranged along the second direction, which is the Z-axis direction in the figure. The second side plate 23 is fixedly connected to the second side of the bottom plate 21.

[0109] The top plate 24 is arranged along the first direction, which is the Y-axis direction in the figure. The first side of the top plate 24 is fixedly connected to the first side plate 22, and the second side of the top plate 24 is fixedly connected to the second side plate 23.

[0110] The bottom plate 21, the first side plate 22, the second side plate 23, and the top plate 24 can be integrally manufactured to form a profile, or can be separately manufactured and fixedly connected by welding.

[0111] In one embodiment, as shown in Figure 5 the rolling device 27 includes a positioning block 271 and a rolling shaft 273.

[0112] The positioning block 271 is adapted to be mounted between the first side plate 22 and the second side plate 23. The length of the positioning block 271 along the X-axis direction is less than or equal to the distance between the first side plate 22 and the second side plate 23. The bottom of the positioning block 271 is provided with a receiving groove 272 recessed from the bottom of the positioning block 271 to the inside of the positioning block 271.

[0113] The roller shaft 273 is arranged in the accommodating groove 272 and can rotate in the accommodating groove 272, the axial direction of the roller shaft 273 is arranged in the first direction, which is the Y-axis direction in the figure, and part of the circumferential surface of the roller shaft 273 can protrude from the bottom of the positioning block 271, which is arranged to enable the clamping groove 14 of the first bottom cross beam 10 to be clamped with the clamping groove 14.

[0114] In one embodiment, as shown in Figure 6 The bottom plate 21 is provided with a plurality of limiting grooves 28 along the length direction, and the positioning block 271 is arranged in the limiting groove 28. Part of the circumferential surface of the roller shaft 273 can protrude from the bottom surface of the bottom plate 21, so as to enable the clamping groove 14 of the first bottom cross beam 10 to be clamped with the clamping groove 14. The limiting groove 28 penetrates the bottom plate 21 of the first rolling beam 20, and the size of the limiting groove 28 is matched with the positioning block 271, so that the positioning block 271 arranged in the limiting groove 28 will not shake.

[0115] In one embodiment, as shown in Figure 6 , Figure 7 The second side plate 23 is provided with a plurality of second connecting holes 29, and the fifth bolt 277 is arranged in the second connecting hole 29 to connect the positioning block 271, so as to ensure that the position of the positioning block 271 in the first rolling beam 20 will not change.

[0116] In one embodiment, as shown in Figure 5 The maximum diameter of the roller shaft 273 is smaller than the diameter of the accommodating groove 272, and the roller shaft 273 can rotate flexibly in the accommodating groove 272.

[0117] In one embodiment, as shown in Figure 7 , Figure 8 , Figure 9 The rolling device 27 further comprises a first stop block 274 and a second stop block 278.

[0118] The first stop block 274 is arranged at the first end of the accommodating groove 272, and is used to fix the first end of the roller shaft 273, so that the first end of the roller shaft 273 can be kept in the accommodating groove 272.

[0119] The second stop block 278 is arranged at the second end of the accommodating groove 272, and is used to fix the second end of the roller shaft 273, so that the second end of the roller shaft 273 can be kept in the accommodating groove 272.

[0120] The first stop block 274 and the second stop block 278 can be polygonal, or can be fan-shaped or arc-shaped. In the drawings, the first stop block 274 and the second stop block 278 are fan-shaped, and the fan angle is greater than 180 degrees. A limiting protrusion 275 is arranged on the circumferential surface of the first stop block 274, and the limiting protrusion 275 is clamped with the positioning block 271, so as to prevent the first stop block 274 from rotating in the accommodating groove 272. The second stop block 278 also adopts the same anti-rotation structure.

[0121] In one embodiment, as shown in Figure 7 , Figure 8 , Figure 9 The rolling device 27 further comprises a first bearing 276 and a second bearing 279.

[0122] The first bearing 276 is arranged in the first stop block 274 to support the first end of the rolling shaft 273 to rotate;

[0123] The second bearing 279 is arranged in the second stop block 278 to support the second end of the rolling shaft 273 to rotate.

[0124] In one embodiment, the first bearing 276 and the second bearing 279 are both sliding bearings, which have a small radial size, and are convenient to be arranged in the first stop block 274 and the second stop block 278, respectively.

[0125] In one embodiment, as shown in Figure 9 The distance between the axis of the accommodating groove 272 and the bottom surface of the positioning block 271 is R, the radius of the first bearing 276 and the second bearing 279 is r, and the maximum diameter of the rolling shaft 273 is φ1. 0.5*φ1>R≥r. Through this arrangement, part of the circumferential surface of the rolling shaft 273 can protrude from the bottom of the positioning block 271, so as to be clamped with the clamping groove 14 of the first bottom cross beam 10.

[0126] In one embodiment, as shown in Figure 9 The rolling shaft 273 is a stepped shaft structure, and the rolling shaft 273 comprises a first shaft segment 2731, a second shaft segment 2732 and a third shaft segment 2733.

[0127] The first shaft segment 2731 is located in the middle part of the rolling shaft 273, and the diameter of the first shaft segment 2731 is φ1.

[0128] The second shaft segment 2732 is arranged at the first end of the first shaft segment 2731, and the diameter of the second shaft segment 2732 is φ2.

[0129] The third shaft segment 2733 is arranged at the second end of the first shaft segment 2731, and the diameter of the third shaft segment 2733 is φ2.

[0130] φ1>φ2. Through this arrangement, the two ends of the rolling shaft 273 are connected with the first bearing 276 and the second bearing 279, respectively.

[0131] In one embodiment, as shown in FIG. 27, the length of the first shaft segment 2731 is d, and the plurality of rolling devices 27 includes at least three different lengths d of the rolling shafts 273, which are increasing from the first end to the second end of the first rolling beam 20. The total length of the rolling shafts 273 is D, and D>d. Figure 9

[0132] Correspondingly, the plurality of clamping slots 14 includes at least three different lengths of the clamping slots 14, which are increasing from the first end to the second end of the first bottom beam 10. The first end of the first bottom beam 10 is the entry end, and the second end is the stop end. The first rolling beam 20 slides into the upper side of the first bottom beam 10 from the first end of the first bottom beam 10 and stops sliding when reaching the second end of the first bottom beam 10. The first end of the first rolling beam 20 corresponds to the first end of the first bottom beam 10, and the second end of the first rolling beam 20 corresponds to the second end of the first bottom beam 10.

[0133] The length of the clamping slot 14 corresponds to the length d of the rolling shaft 273 in the rolling device 27, while satisfying the conditions that the slot width is less than the maximum diameter φ1 of the rolling shaft 273, and the slot length d1<d2=d3=…=dn-1<dn, where d1 is the slot length of the clamping slot 14 at the first end position, and dn is the slot length of the clamping slot 14 at the second end position.

[0134] Through this arrangement, the rolling shaft 273 rolls through the clamping slots 14 on the first bottom beam 10 in sequence. At this time, the first rolling shaft 273 at the second end of the first rolling beam 20 corresponds to the clamping slot 14 at the first end of the first bottom beam 10, and the length d of the rolling shaft 273 is greater than the length d1 of the encountered clamping slot 14, so the rolling shaft 273 will not sink (be clamped) due to the encountered clamping slot 14, causing difficulty in pushing in. Except for the first rolling shaft 273 at the first end of the first rolling beam 20, the lengths of the other rolling shafts 273 are also greater than the lengths d1 of the encountered clamping slots 14.

[0135] Similarly, as the first rolling beam 20 slides, the rolling shaft 273 at the second end of the first rolling beam 20 is also greater than the lengths d2, d3, …, dn-1 of the encountered clamping slots 14, so the rolling shaft 273 will not sink (be clamped) due to the encountered clamping slot 14. Only when the rolling shaft 273 reaches the clamping slot 14 with the length dn can it sink (be clamped) in the corresponding clamping slot 14.

[0136] ​After the battery pack reaches the designated position, all the rollers 273 are just aligned with the positions of the clamping grooves 14, all the rollers 273 are simultaneously sunk into the clamping grooves 14, the rollers 273 no longer contact the first bottom cross beam 10 in the vertical direction, all the rollers 273 unload the load of the battery pack, the lower surface of the first rolling beam 20 contacts the supporting surface of the first bottom cross beam 10, which avoids that the battery pack with a large weight is pressed on the rollers 273 for a long time, so that the structure of the components contacted by the rollers 273 is deformed.

[0137] In one embodiment, as shown in Figure 1 , Figure 10 The top plate 24 of the first rolling beam 20 is provided with a plurality of first connecting holes 26, and the first connecting holes 26 are provided with first bolts 30 for connecting the battery pack. In the figure, the water-cooled plate 100 of the battery pack is connected.

[0138] In one embodiment, as shown in Figure 6 The bottom plate 21 of the first rolling beam 20 is provided with mounting holes 90 corresponding to the first connecting holes 26, and the mounting holes 90 are used for disassembling the bolts or nuts through the disassembling tool.

[0139] In one embodiment, as shown in Figure 1 , Figure 2 The end of the top plate 24 of the first rolling beam 20 is provided with a bending part 25, which is used for limiting the battery pack and facilitating the accurate installation of the first rolling beam 20 to the bottom of the battery pack.

[0140] In one embodiment, as shown in Figure 1 , Figure 2 , Figure 3 The bottom plate 21 of the first rolling beam 20 is provided with a second bolt 40 near the end for connecting the bottom supporting plate 12 of the first bottom cross beam 10. A plurality of second bolts 40 can be arranged at both ends of the bottom plate 21, and the bottom plate 21 and the bottom supporting plate 12 are provided with connecting holes corresponding to each other. After the sliding of the battery pack in the energy storage device is completed, the second bolt 40 can be installed to ensure that the battery pack cannot be moved randomly in the energy storage device. When the battery pack needs to be pulled out, the second bolt 40 needs to be disassembled first.

[0141] As shown in Figure 1 , Figure 2 , Figure 3 In the preferred embodiment, the first bottom cross beam 10 comprises a second beam body and a plurality of clamping grooves 14.

[0142] The second beam body can be made of metal profiles, such as angle steel, and the length thereof is adapted to the length of the battery pack.

[0143] A plurality of clamping grooves 14 are arranged along the length direction of the second beam body, the length direction being the X-axis direction in the figure, the lengths of the plurality of clamping grooves 14 increasing from the first end to the second end of the second beam body, and the clamping grooves 14 being used to adapt to the rolling device 27 of the rolling beam in any of the above embodiments.

[0144] By arranging a plurality of clamping grooves 14 with increasing lengths in the second beam body, it can be avoided that the rolling shafts 273 of the rolling device 27 fall into non-corresponding clamping grooves 14 during the pushing process of the battery pack, causing the battery pack to be not installed in place.

[0145] In one embodiment, as shown in Figure 11 , the first bottom cross beam 10 is provided with at least three clamping grooves 14 with different lengths, and the lengths of the at least three clamping grooves 14 increase from the first end to the second end of the first bottom cross beam 10. The first end of the first bottom cross beam 10 is the entry end, and the second end is the stop end. The first rolling beam 20 slides into the upper side of the first bottom cross beam 10 from the first end of the first bottom cross beam 10, and stops sliding when it reaches the second end of the first bottom cross beam 10. The first end of the first rolling beam 20 corresponds to the first end of the first bottom cross beam 10, and the second end of the first rolling beam 20 corresponds to the second end of the first bottom cross beam 10.

[0146] As shown in Figure 11 , the slot lengths of the clamping grooves 14 satisfy d1 < d2 = d3 = … = dn-1 < dn, where d1 is the slot length of the clamping groove 14 at the first end position, and dn is the slot length of the clamping groove 14 at the second end position. Correspondingly, the lengths d of the rolling shafts 273 of the plurality of rolling devices 27 correspond to the slot lengths of the clamping grooves 14, respectively.

[0147] Due to the corresponding relationship between the rolling shafts 273 and the clamping grooves 14, during the sliding process of the first rolling beam 20 on the first bottom cross beam 10 from the first end to the second end, before the rolling shaft 273 at the second end of the first rolling beam 20 reaches the clamping groove 14 at the second end of the first bottom cross beam 10, none of the rolling shafts 273 will fall into (be clamped by) the clamping grooves 14 that have passed, causing difficulty in pushing. Until the rolling shaft 273 at the second end of the first rolling beam 20 reaches the clamping groove 14 at the second end of the first bottom cross beam 10, at this time all the rolling shafts 273 can fall into (be clamped by) the corresponding clamping grooves 14, respectively.

[0148] In one embodiment, as shown in Figure 11 , the spacing between the plurality of clamping grooves 14 increases sequentially from the first end to the second end of the second beam body.

[0149] As shown in Figure 11 , the spacing between each clamping groove 14 satisfies L1 < L2 < … < Ln-1 < Ln, where L1 is the slot spacing of the two clamping grooves 14 close to the first end position, and Ln is the slot spacing of the two clamping grooves 14 close to the second end position.

[0150] The first end of the first bottom cross beam 10 is the entering end of the first rolling beam 20, and the first rolling beam 20 slides into the first bottom cross beam 10 from the first end of the first bottom cross beam 10. By arranging the plurality of clamping grooves 14 in a non-equidistant arrangement, it can always be ensured that all rolling devices 27 are on the support surface of the first bottom cross beam 10 before the battery pack is completely in the designated position, and will not be trapped in the clamping grooves 14, ensuring the smoothness of the entire battery pack advancing process.

[0151] In one embodiment, as shown in Figure 11 、 Figure 13 、 Figure 14 The second beam body includes a bottom support plate 12 and a side support plate 11.

[0152] The bottom support plate 12 is arranged along a first direction, which is the Y-axis direction in the figure, and the clamping grooves 14 are arranged on the bottom support plate 12. The top surface of the bottom support plate 12 is the support surface of the first bottom cross beam 10, which is a plane. The plurality of rolling devices 27 roll on the support surface, so that the battery pack as a whole keeps a planar motion during the advancing process of the battery pack.

[0153] The side support plate 11 is arranged along a second direction, which is the Z-axis direction in the figure, and the second direction is perpendicular to the first direction. The side support plate 11 is fixedly connected with the side of the bottom support plate 12.

[0154] The bottom support plate 12 and the side support plate 11 can be integrally made to form a profile, or the bottom support plate 12 and the side support plate 11 can be separately made and fixedly connected by welding.

[0155] In one embodiment, as shown in Figure 11 、 Figure 12 The first bottom cross beam 10 further includes:

[0156] A guide block 13 fixedly connected with the side support plate 11 or the bottom support plate 12, and the horizontal cross section of the guide block 13 is trapezoidal or arc-shaped, which is used to guide the sliding of the first rolling beam 20.

[0157] In the figure, the guide block 13 can be fixedly connected with the side support plate 11 by bolts. When the first rolling beam 20 slides on the first bottom cross beam 10, the end of the first rolling beam 20 contacts the side surface of the guide block 13, which is pushed by the guide block 13 to keep the first rolling beam 20 moving in a straight line, so as to ensure that the rolling device 27 and the clamping groove 14 can be accurately clamped and matched, and also to avoid the clamping from being stuck during the sliding process.

[0158] In one embodiment, as shown in Figure 13 、 Figure 14As shown, the card slot 14 is provided with a slope on the side where the roller shaft 273 of the first rolling beam 20 enters, which facilitates the smooth entry of the roller shaft 273 into the card slot 14 and avoids sudden impact, and also facilitates the smooth sliding of the roller shaft 273 out of the card slot 14 when the battery pack is pulled out of the energy storage device.

[0159] As shown in Figure 12 , Figure 13 , Figure 14 The embodiment of the utility model also provides a kind of energy storage battery rack crossbeam subassembly, comprising:

[0160] The rolling beam of any one of the above embodiments;

[0161] The bottom crossbeam of any one of the above embodiments;

[0162] Wherein, the rolling device 27 of the rolling beam can support the rolling beam to slide on the bottom crossbeam, and the bottom surface of the rolling beam and the supporting surface of the bottom crossbeam have a gap during the sliding process, when the rolling beam slides to a predetermined position, the roller shaft 273 of the rolling device 27 is clamped with the card slot 14, and the bottom surface of the rolling beam is in contact with the supporting surface of the bottom crossbeam.

[0163] As shown in Figure 1 , Figure 2 , Figure 3 The embodiment of the utility model also provides a kind of battery pack, comprising: at least two rolling beams, two rolling beams are symmetrically arranged at the bottom of the battery pack, and the rolling beam is provided with a plurality of rolling devices 27.

[0164] Only the water-cooled plate 100 of the battery pack is shown in the figure, and cooling liquid can flow through the water-cooled plate 100 to regulate the temperature of the battery pack. The rolling beams are symmetrically arranged at the bottom of the water-cooled plate 100. Other structures of the battery pack can refer to the prior art, which will not be described in detail here.

[0165] As shown in Figure 1 , Figure 2 , Figure 3 The embodiment of the utility model also provides a kind of energy storage device, comprising:

[0166] The battery pack;

[0167] The energy storage battery rack crossbeam subassembly of any one of the above embodiments, the rolling beam of the energy storage battery rack crossbeam subassembly is arranged at the bottom of the battery pack, and the battery pack is arranged on the bottom crossbeam of the energy storage battery rack crossbeam subassembly.

[0168] The energy storage device includes an even number of energy storage battery rack crossbeam subassemblies, which can be divided into multiple layers, and the bottom crossbeams of two energy storage battery rack crossbeam subassemblies in each layer are symmetrically arranged and jointly support a battery pack.

[0169] According to the rolling beam, bottom cross beam and energy storage battery rack cross beam assembly, the rolling beam is arranged at the bottom of the battery pack, the bottom cross beam is arranged in the energy storage device, the rolling beam can slide on the bottom cross beam, frictional resistance is reduced, the battery pack is convenient to disassemble and assemble in the energy storage device, the rolling beam forms a large supporting area for the battery pack, and damage to the structure of the battery pack is effectively avoided.

[0170] The processes and steps described in all the preferred embodiments above are merely examples. Unless an adverse effect occurs, various processing operations can be performed in an order different from that of the above processes. The order of the steps of the above processes can also be added, combined or deleted according to actual needs.

[0171] In understanding the scope of the present application, the term "comprising" and its derivatives, as used herein, are intended to be open-ended terms that specify the presence of the stated features, elements, components, groups, integers, and / or steps, but do not exclude the presence of other unstated features, elements, components, groups, integers and / or steps. The use of the term "comprising" also is intended to include the presence of one or more features, elements, components, groups, integers, and / or steps, but does not exclude the presence of other features, elements, components, groups, integers and / or steps.

[0172] The term "attached" or "attach" as used herein includes a configuration in which an element is directly fixed to another element by fixing the element to the other element, a configuration in which an element is indirectly fixed to another element by fixing the element to an intermediate member which is in turn fixed to the other element, and a configuration in which one element is integral with another element, i.e., one element is essentially a part of the other element. This definition also applies to words with similar meanings, such as "connected", "coupled", "joined", "fixed", "bonded", "secured", and derivatives thereof. Finally, the degree terms such as "substantially", "approximately" and "about" as used herein mean an amount that does not significantly change the end result.

[0173] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The features described herein in one embodiment can be applied to another embodiment, either individually or in combination, unless such application is not applicable or is otherwise indicated.

[0174] The utility model has been through the above -mentioned implementation has carried on the explanation, but should understand, the above -mentioned implementation is only for example and the purpose of illustration, and is not intended to limit the utility model to the described implementation range. In addition, those skilled in the art can understand that the utility model is not limited to the above -mentioned implementation, and more kinds of variations and modifications can be made according to the teaching of the utility model, and these variations and modifications all fall within the scope of the utility model claimed.

Claims

1. A rolling beam, characterized in that, The utility model relates to a kind of beam, including: First beam body; Multiple rolling devices (27), multiple the rolling device (27) is arranged along the length direction of the first beam body, the rolling device (27) includes rolling shaft (273); Wherein, the rolling shaft (273) includes first shaft section (2731), the first shaft section (2731) is located in the middle of the rolling shaft (273), part of the circumferential surface of the first shaft section (2731) can protrude from the bottom of the rolling device (27), the axial length of the first shaft section (2731) of multiple the rolling device (27) increases from the first end to the second end of the first beam body.

2. The rolling beam according to claim 1, characterized in that, The interval between multiple the rolling device (27) sequentially increases from the first end to the second end of the first beam body.

3. The rolling beam according to claim 1, characterized in that, The first beam body includes: Bottom plate (21), the bottom plate (21) is arranged along first direction, part of the circumferential surface of the first shaft section (2731) can protrude from the bottom surface of the bottom plate (21), so as to enter the clamping groove (14) of bottom cross beam and the clamping groove (14) are realized clamping; First side plate (22), the first side plate (22) is arranged along second direction, the second direction is perpendicular to the first direction, the first side plate (22) is fixedly connected with the first side of the bottom plate (21); Second side plate (23), the second side plate (23) is arranged along second direction, the second side plate (23) is fixedly connected with the second side of the bottom plate (21); Top plate (24), the top plate (24) is arranged along first direction, the first side of the top plate (24) is fixedly connected with the first side plate (22), and the second side of the top plate (24) is fixedly connected with the second side plate (23).

4. The rolling beam according to claim 3, characterized in that The rolling device (27) includes: Positioning block (271), the positioning block (271) is suitable for being installed between the first side plate (22) and the second side plate (23), and the bottom of the positioning block (271) is provided with accommodating groove (272); The rolling shaft (273) is arranged in the accommodating groove (272) and can rotate in the accommodating groove (272), and the axial direction of the rolling shaft (273) is arranged along the first direction, part of the circumferential surface of the rolling shaft (273) can protrude from the bottom of the positioning block (271).

5. The rolling beam according to claim 4, characterized in that, The bottom plate (21) is provided with a plurality of limiting grooves (28) along the length direction, and the positioning block (271) is arranged in the limiting groove (28).

6. The rolling beam according to claim 4, characterized in that, The second side plate (23) is provided with a plurality of second connecting holes (29), and the fifth bolt (277) is arranged in the second connecting hole (29) to connect the positioning block (271).

7. The rolling beam of claim 4 wherein, The maximum diameter of the rolling shaft (273) is less than the diameter of the accommodating groove (272).

8. The rolling beam of claim 4, wherein, The rolling device (27) further includes: First stop block (274), the first stop block (274) is arranged at the first end of the accommodating groove (272), for fixing the first end of the rolling shaft (273), Second stop block (278), the second stop block (278) is arranged at the second end of the accommodating groove (272), for fixing the second end of the rolling shaft (273).

9. A rolling beam according to claim 8, characterised in that, The rolling device (27) further comprises: a first bearing (276) arranged in the first block (274) to support the first end of the rolling shaft (273) to rotate; a second bearing (279) arranged in the second block (278) to support the second end of the rolling shaft (273) to rotate.

10. The rolling beam according to claim 9, characterized in that, The first bearing (276) and the second bearing (279) are both sliding bearings.

11. The rolling beam according to claim 9, characterized in that, The distance between the axis of the accommodating groove (272) and the bottom surface of the positioning block (271) is R, the radius of the first bearing (276) and the second bearing (279) is r, and the maximum diameter of the rolling shaft (273) is φ1, 0.5*φ1>R≥r.

12. The rolling beam of claim 1, wherein, The rolling shaft (273) further comprises: a second shaft segment (2732) arranged at the first end of the first shaft segment (2731); a third shaft segment (2733) arranged at the second end of the first shaft segment (2731); The diameter of the first shaft segment (2731) is φ1, and the diameter of the second shaft segment (2732) and the third shaft segment (2733) is φ2, φ1>φ2.

13. The rolling beam according to claim 12, characterized in that, The length of the first shaft segment (2731) is d, and a plurality of rolling devices (27) comprise at least three rolling shafts (273) with different lengths d, and the lengths d of the at least three rolling shafts (273) increase from the first end to the second end of the rolling beam.

14. The rolling beam according to claim 3, wherein, The top plate (24) of the rolling beam is provided with a plurality of first connecting holes (26), and bolts are arranged in the first connecting holes (26) to connect the battery pack.

15. The rolling beam of claim 14, wherein, The bottom plate (21) of the rolling beam is provided with a mounting hole (90) corresponding to the first connecting hole (26), and a tool is used to disassemble and assemble the bolts or nuts through the mounting hole (90).

16. The rolling beam according to claim 3, wherein, The end of the top plate (24) of the rolling beam is provided with a bending part (25) for limiting the battery pack.

17. A floor cross-member characterized by, It comprises: a second beam body; a plurality of clamping grooves (14) arranged along the length direction of the second beam body, and the lengths of the plurality of clamping grooves (14) increase from the first end to the second end of the second beam body, and the clamping grooves (14) are used to adapt to the rolling device (27) of the rolling beam of any one of claims 1-16.

18. The cross-car beam of claim 17, wherein, The bottom cross beam is provided with at least three clamping grooves (14) with different lengths, and the lengths of the at least three clamping grooves (14) increase from the first end to the second end of the bottom cross beam.

19. The cross-car beam of claim 17, wherein, The spacing between the plurality of clamping grooves (14) increases in turn from the first end to the second end of the second beam body.

20. The cross-car beam of claim 17, wherein, The second beam body comprises: a bottom support plate (12) arranged in a first direction, the clamping grooves (14) are arranged on the bottom support plate (12), and the top surface of the bottom support plate (12) is the support surface of the bottom cross beam; A side support plate (11) is arranged along a second direction which is perpendicular to the first direction, and the side support plate (11) is fixedly connected with the side of the bottom support plate (12).

21. The cross-car beam of claim 20, wherein, The bottom cross beam further comprises: A guide block (13) is fixedly connected with the side support plate (11) or the bottom support plate (12), and the horizontal cross section of the guide block (13) is trapezoidal or arc-shaped, which is used for guiding the sliding of the rolling beam.

22. The cross-car beam of claim 17, wherein, The clamping groove (14) is provided with a slope on the side where the rolling shaft (273) of the rolling beam enters.

23. An energy storage battery rack cross member assembly, comprising: The rolling beam comprises: The rolling beam according to any one of claims 1-16; The bottom cross beam according to any one of claims 17-22; The rolling device (27) of the rolling beam can support the rolling beam to slide on the bottom cross beam, and the bottom surface of the rolling beam has a gap with the supporting surface of the bottom cross beam during the sliding. When the rolling beam slides to a predetermined position, the rolling shaft (273) of the rolling device (27) is clamped with the clamping groove (14), and the bottom surface of the rolling beam is in contact with the supporting surface of the bottom cross beam.

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