Energy storage battery rack beam assembly, battery pack, energy storage device

Abstract

The present invention discloses an energy storage battery rack crossbeam assembly, a battery pack and an energy storage device. The energy storage battery rack crossbeam assembly includes: a bottom crossbeam and a rolling beam. The bottom crossbeam is provided with a plurality of slots along the length direction, and the lengths of the plurality of slots increase from the first end to the second end of the bottom crossbeam; the rolling beam is provided with a plurality of rolling devices, and the plurality of rolling devices can be respectively engaged with the plurality of slots; wherein the rolling devices can support the rolling beam to slide on the bottom crossbeam, and during the sliding process, there is a gap between the bottom surface of the rolling beam and the supporting surface of the bottom crossbeam. When the rolling beam slides to a predetermined position, the rolling device is engaged with the slot, and the bottom surface of the rolling beam contacts the supporting surface of the bottom crossbeam. The present invention arranges the rolling beam at the bottom of the battery pack, and the bottom crossbeam is arranged in the energy storage device. The rolling beam can slide on the bottom crossbeam, thereby reducing friction resistance, facilitating the disassembly and assembly of the battery pack in the energy storage device, and the rolling beam forms a large supporting area for the battery pack, effectively avoiding damage to the structure of the battery pack.

Description

Technical Field

[0001] The present invention generally relates to the technical field of energy storage batteries, and more specifically to an energy storage battery frame crossbeam assembly, a battery pack, and an energy storage device. Background Art

[0002] With the country's vigorous promotion of energy storage, the field of electrochemical energy storage has gradually become a mainstream trend, and energy storage devices have been increasingly widely used. In energy storage devices, energy storage battery packs are installed on multi-layer battery racks, where the battery racks are usually composed of cross beams and longitudinal beams. The longitudinal beams are fixed vertically, and the cross beams are fixed on the longitudinal beams to support the energy storage battery packs.

[0003] At present, when putting battery packs into the rack, special tools are used to place the battery packs on the slides on both sides of the battery rack, and then the battery packs on the slides are pushed into the battery rack; however, during later maintenance, if the special tools are not in place, due to the large volume and weight of a single battery pack, the friction resistance is large when pushing and pulling, which is time-consuming and laborious. Moreover, for battery packs using water-cooled plates, direct pushing and pulling will damage the insulating paint of the water-cooled plates, exacerbating the electrochemical corrosion of the water-cooled plates during later use.

[0004] Some battery racks have several rollers installed on the beams on both sides. When pushing and pulling the battery pack on the battery rack, the rollers can effectively reduce friction, making the push and pull operation of the battery pack more labor-saving. In this way, the battery pack and the rollers are always in a state of surface and line contact. The weight of the battery pack is always concentrated on the beams through the rollers, leaving hidden dangers in the fixation of the battery pack. In addition, the weight of the battery pack is concentrated on the rollers for a long time, and the parts in contact with the rollers are prone to stress concentration, resulting in structural deformation.

[0005] Therefore, it is necessary to provide an energy storage battery rack crossbeam assembly, a battery pack, and an energy storage device to at least partially solve the above problems. Summary of the invention

[0006] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0007] In order to at least partially solve the above problems, a first aspect of the present invention provides an energy storage battery rack crossbeam assembly, comprising:

[0008] A bottom cross beam, wherein the bottom cross beam is provided with a plurality of slots along the length direction, wherein the lengths of the plurality of slots increase from the first end to the second end of the bottom cross beam, wherein the first end is an entry end, and the second end is a stop end, and the length direction of the slots is perpendicular to the length direction of the bottom cross beam;

[0009] A rolling beam, wherein the rolling beam is provided with a plurality of rolling devices, the plurality of rolling devices can be respectively engaged with the plurality of clamping grooves, the rolling beam slides from the first end of the bottom cross beam into the upper part of the bottom cross beam, and stops sliding when sliding to the second end of the bottom cross beam;

[0010] Among them, the rolling device can support the rolling beam to slide on the bottom cross beam. During the sliding process, there is a gap between the bottom surface of the rolling beam and the support surface of the bottom cross beam. When the rolling beam slides to a predetermined position, the rolling device is engaged with the slot, and the bottom surface of the rolling beam contacts the support surface of the bottom cross beam.

[0011] Optionally, the bottom cross beam is provided with at least three kinds of the slots with different lengths, and the at least three kinds of the slots with different lengths increase from the first end to the second end of the bottom cross beam.

[0012] Optionally, the spacing between the plurality of slots increases sequentially from the first end to the second end of the bottom cross beam, and the spacing between the plurality of rolling devices matches the spacing between the plurality of slots.

[0013] Optionally, the bottom cross beam comprises:

[0014] A bottom support plate, the bottom support plate is arranged along a first direction, the card slot is arranged on the bottom support plate, and the top surface of the bottom support plate is a support surface of the bottom cross beam;

[0015] 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 a side portion of the bottom support plate.

[0016] Optionally, the bottom cross beam further includes:

[0017] A guide block, wherein the guide block is fixedly connected to the side support plate or the bottom support plate, and the horizontal cross-section of the guide block is trapezoidal or arc-shaped, and is used to guide the rolling beam to slide.

[0018] Optionally, the rolling beam comprises:

[0019] A bottom plate, the bottom plate is arranged along a first direction, the width of the bottom plate is smaller than the width of the bottom support plate, and the bottom surface of the bottom plate is the bottom surface of the rolling beam;

[0020] A first side plate, the first side plate is arranged along the second direction, the first side plate is fixedly connected to the first side of the bottom plate, and the first side plate is close to the side support plate;

[0021] A second side plate, the second side plate is arranged along a second direction, and the second side plate is fixedly connected to a second side of the bottom plate;

[0022] A top plate is arranged along a first direction, a first side of the top plate is fixedly connected to the first side plate, and a second side of the top plate is fixedly connected to the second side plate.

[0023] Optionally, the rolling device comprises:

[0024] A positioning block, wherein the positioning block is suitable for being installed between the first side plate and the second side plate, and a receiving groove is provided at the bottom of the positioning block;

[0025] A roller is disposed in the receiving groove and can rotate in the receiving groove, the axial direction of the roller is disposed along a first direction, and a part of the circumferential surface of the roller can protrude from the bottom of the positioning block.

[0026] Optionally, the bottom plate of the rolling beam is provided with a plurality of limit grooves along the length direction, the positioning block is arranged in the limit groove, and part of the circumferential surface of the roller can protrude from the bottom surface of the bottom plate, so that it can enter the slot of the bottom cross beam and realize the snap connection with the slot.

[0027] Optionally, the second side plate of the rolling beam is provided with a plurality of second connecting holes, and a fifth bolt is provided in the second connecting hole to connect the positioning block.

[0028] Optionally, the maximum diameter of the roller is smaller than the diameter of the accommodating groove.

[0029] Optionally, the slot of the bottom cross beam is provided with a slope on the side where the roller enters.

[0030] Optionally, the rolling device further comprises:

[0031] A first stopper, which is disposed at a first end of the receiving groove and is used to fix the first end of the roller.

[0032] A second stopper is disposed at the second end of the accommodating groove and is used to fix the second end of the roller.

[0033] Optionally, the rolling device further comprises:

[0034] A first bearing, the first bearing being disposed in the first stopper to support the first end of the roller to rotate;

[0035] A second bearing, wherein the second bearing is arranged in the second stopper and supports the second end of the roller to rotate.

[0036] Optionally, the first bearing and the second bearing are both sliding bearings.

[0037] Optionally, the distance between the axis of the accommodating groove and the bottom surface of the positioning block is R, the radius of the first bearing and the second bearing is r, the maximum diameter of the roller is φ1, and 0.5*φ1>R≥r.

[0038] Optionally, the roller comprises:

[0039] A first shaft segment, the first shaft segment is located in the middle of the roller, and the diameter of the first shaft segment is φ1;

[0040] A second shaft segment, the second shaft segment is arranged at the first end of the first shaft segment, and the diameter of the second shaft segment is φ2;

[0041] A third shaft segment, the third shaft segment is arranged at the second end of the first shaft segment, and the diameter of the third shaft segment is φ2;

[0042] φ1>φ2.

[0043] Optionally, the length of the first shaft segment is d, and the plurality of rolling devices include at least three rollers with different lengths d, and the at least three rollers with different lengths d increase from the first end to the second end of the rolling beam.

[0044] Optionally, the top plate of the rolling beam is provided with a plurality of first connection holes, and bolts are provided in the first connection holes to connect the battery pack.

[0045] Optionally, a mounting hole is provided on the bottom plate of the rolling beam corresponding to the first connecting hole, and a disassembly tool disassembles and assembles bolts or nuts through the mounting hole.

[0046] Optionally, a bending portion is provided at the end of the top plate of the rolling beam, and the bending portion is used to limit the position of the battery pack.

[0047] Optionally, a bottom support plate connected to the bottom cross beam by bolts is provided near the end of the bottom plate of the rolling beam.

[0048] The second aspect of the present invention provides a battery pack, comprising: at least two rolling beams of the energy storage battery rack cross beam assembly described in any one of the above technical solutions, the two rolling beams are symmetrically arranged at the bottom of the battery pack, and the rolling device of the rolling beam is used to be clamped with the clamping groove of the bottom cross beam of the energy storage battery rack cross beam assembly described in any one of the above technical solutions.

[0049] A third aspect of the present invention provides an energy storage device, comprising:

[0050] Battery pack;

[0051] In the energy storage battery rack cross beam assembly described in any one of the above technical solutions, the rolling beam of the energy storage battery rack cross beam assembly is arranged at the bottom of the battery pack, and the battery pack is arranged on the bottom cross beam of the energy storage battery rack cross beam assembly.

[0052] According to an energy storage battery rack crossbeam assembly, battery pack and energy storage device of the present invention, by setting a rolling beam at the bottom of the battery pack and a bottom crossbeam in the energy storage device, the rolling beam can slide on the bottom crossbeam, reducing friction resistance, facilitating the disassembly and assembly of the battery pack in the energy storage device, and the rolling beam forms a large support area for the battery pack, effectively avoiding damage to the structure of the battery pack. When the rolling beam slides to a predetermined position on the bottom crossbeam, the bottom surface of the rolling beam contacts the support surface of the bottom crossbeam, forming a stable support structure that no longer relies on the rolling device for support, thereby improving the stability of the battery pack in the energy storage device and avoiding deformation or damage to the rolling device and parts in contact with the rolling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The embodiments of the present invention and their description are shown in the drawings to explain the principles of the present invention. In the drawings,

[0054] Figure 1 is a three-dimensional diagram of a battery pack according to a preferred embodiment of the present invention, in which only a water cooling plate of the battery pack is shown;

[0055] Figure 2 for Figure 1 Enlarged view of middle E part;

[0056] Figure 3 is a three-dimensional diagram of a battery pack according to a preferred embodiment of the present invention, in which only a water cooling plate of the battery pack is shown;

[0057] Figure 4 A three-dimensional diagram of a combined state of a bottom cross beam and a rolling beam according to a preferred embodiment of the present invention;

[0058] Figure 5 A front view of a combined state of a bottom cross beam and a rolling beam according to a preferred embodiment of the present invention;

[0059] Figure 6 for Figure 5 Sectional view along AA;

[0060] Figure 7 for Figure 6 Enlarged view of the middle F part;

[0061] Figure 8 A three-dimensional diagram of a rolling device according to a preferred embodiment of the present invention;

[0062] Fig. 9 A three-dimensional diagram of a rolling device according to a preferred embodiment of the present invention;

[0063] Fig.10 A left side view of a rolling device according to a preferred embodiment of the present invention;

[0064] Fig.11 for Fig.10 Sectional view along BB;

[0065] Fig.12 A three-dimensional diagram of a rolling beam according to a preferred embodiment of the present invention;

[0066] Fig.13 It is a three-dimensional view of a bottom cross beam according to a preferred embodiment of the present invention.

[0067] Description of reference numerals:

[0068] 10: First bottom beam 11: Side support plate

[0069] 12: Bottom support plate 13: Guide block

[0070] 14: slot 20: first rolling beam

[0071] 21: Bottom plate 22: First side plate

[0072] 23: Second side plate 24: Top plate

[0073] 25: bending part 26: first connecting hole

[0074] 27: Rolling device 271: Positioning block

[0075] 272: Receiving groove 273: Roller

[0076] 2731: First shaft section 2732: Second shaft section

[0077] 2733: Third shaft section 274: First stopper

[0078] 275: Limiting protrusion 276: First bearing

[0079] 277: Fifth bolt 278: Second stopper

[0080] 279: Second bearing 28: Limiting groove

[0081] 29: Second connection hole 30: First bolt

[0082] 40: Second bolt 50: Second bottom beam

[0083] 60: second rolling beam 70: third bolt

[0084] 80: Fourth bolt 90: Mounting hole

[0085] 100: Water cooling plate DETAILED DESCRIPTION

[0086] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0087] In order to fully understand the present invention, a detailed description will be provided in the following description. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0088] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifications and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0089] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in the present invention are for illustrative purposes only and are not limiting.

[0090] The invention discloses an energy storage battery frame crossbeam assembly, a battery pack and an energy storage device.

[0091] Now, exemplary embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

[0092] like Figure 1 , Figure 2 , Figure 3 As shown, in a preferred embodiment, an energy storage battery rack beam assembly includes: a bottom beam and a rolling beam;

[0093] In the figure, the first bottom cross beam 10 and the first rolling beam 20 form an energy storage battery rack cross beam assembly, and the second bottom cross beam 50 and the second rolling beam 60 form another energy storage battery rack cross beam assembly; the first rolling beam 20 and the second rolling beam 60 are both arranged at the bottom of the battery pack, and the first bottom cross beam 10 and the second bottom cross beam 50 are both arranged in the energy storage device;

[0094] The bottom cross beam is provided with a plurality of slots 14 along the length direction, and the lengths of the plurality of slots 14 increase from the first end to the second end of the bottom cross beam. The first end of the bottom cross beam is an entry end, and the second end is a stop end. The rolling beam slides from the first end of the bottom cross beam into the top of the bottom cross beam, and stops sliding when sliding to the second end of the bottom cross beam. The length direction of the bottom beam is the X-axis direction in the figure, and the slots 14 in the figure are rectangular.

[0095] The rolling beam is provided with a plurality of rolling devices 27, and the plurality of rolling devices 27 can be respectively engaged with the plurality of slots 14; a roller or a roller shaft 273 is provided at the bottom of the rolling device 27, and the roller or the roller shaft 273 can enter the slot 14;

[0096] Among them, the rolling device 27 can support the rolling beam to slide on the bottom cross beam. During the sliding process, there is a gap between the bottom surface of the rolling beam and the support surface of the bottom cross beam. During this process, the friction between the rolling beam and the bottom cross beam is small. When the rolling beam slides to a predetermined position, the rolling device 27 is engaged with the slot 14, and the bottom surface of the rolling beam contacts the support surface of the bottom cross beam, so that the rolling beam and the bottom cross beam form a stable supporting relationship.

[0097] The energy storage battery rack crossbeam assembly in this embodiment is configured such that the rolling beam is disposed at the bottom of the battery pack and the bottom crossbeam is disposed in the energy storage device. The rolling beam can slide on the bottom crossbeam, thereby reducing friction resistance and facilitating the disassembly and assembly of the battery pack in the energy storage device. The rolling beam forms a large support area for the battery pack, effectively avoiding damage to the structure of the battery pack. When the rolling beam slides to a predetermined position on the bottom crossbeam, the bottom surface of the rolling beam contacts the support surface of the bottom crossbeam, thereby forming a stable support structure that no longer relies on the rolling device for support, thereby improving the stability of the battery pack in the energy storage device and avoiding deformation or damage to the rolling device and components in contact with the rolling device.

[0098] Figure 1 , Figure 3 The first bottom cross beam 10 and the second bottom cross beam 50 have the same structure and are symmetrically arranged at the bottom of the battery pack. The first rolling beam 20 and the second rolling beam 60 have the same structure and are symmetrically arranged in the energy storage device. The first bottom cross beam 10 and the first rolling beam 20 are used as examples for description. The second bottom cross beam 50 and the second rolling beam 60 can refer to the first bottom cross beam 10 and the first rolling beam 20.

[0099] In one embodiment, if Figure 3 As shown, the bottom cross beam is provided with at least three different lengths of the slots 14, and the at least three different lengths of the slots 14 increase from the first end to the second end of the bottom cross beam.

[0100] You can refer to Fig.11 , Fig.13As shown, the slotting length d1 of the card slot 14 < d2 = d3 = … = dn-1 < dn, where d1 is the slotting length of the card slot 14 at the first end position, and dn is the slotting length of the card slot 14 at the second end position. Correspondingly, the length d of the rollers 273 of the plurality of rolling devices 27 corresponds to the slotting length of the card slot 14 respectively.

[0101] Restricted by the corresponding relationship between the roller 273 and the card slot 14, during the process of the rolling beam sliding from the first end to the second end on the bottom cross beam, before the roller 273 at the second end of the rolling beam reaches the card slot 14 at the second end of the bottom cross beam, none of the rollers 273 will fall into (be clamped) the passed card slot 14, resulting in difficult pushing. Until the roller 273 at the second end of the rolling beam reaches the card slot 14 at the second end of the bottom cross beam, at this time all the rollers 273 can fall into (be clamped) the corresponding card slot 14 respectively.

[0102] In one embodiment, as Figure 3 shown, the spacing between the plurality of card slots 14 increases sequentially from the first end to the second end of the bottom cross beam, and the spacing between the plurality of rolling devices 27 is adapted to the spacing between the plurality of card slots 14. It can be referred to Fig.13 shown, the spacing between each card slot 14 satisfies L1 < L2 < … < Ln-1 < Ln, where L1 is the slot spacing between two card slots 14 near the first end position, and Ln is the slot spacing between two card slots 14 near the second end position.

[0103] The first end of the bottom cross beam is the entry end of the rolling beam, and the rolling beam slides into the bottom cross beam from the first end of the bottom cross beam. By arranging the plurality of card slots 14 in a non-equidistant manner, before the battery pack completely enters the specified position, it can always be ensured that all the rolling devices 27 are on the support surface of the bottom cross beam and will not fall into the card slots 14, ensuring the smoothness of the entire battery pack propulsion process.

[0104] In one embodiment, as Figure 4 、 Figure 5 、 Figure 6 shown, the bottom cross beam includes: a bottom support plate 12 and side support plates 11;

[0105] The bottom support plate 12 is arranged along the first direction, the first direction is the Y-axis direction in the figure, the card slot 14 is arranged on the bottom support plate 12, the top surface of the bottom support plate 12 is the support surface of the bottom cross beam, this support surface is a plane, and the plurality of rolling devices 27 roll on the support surface, so that the battery pack as a whole maintains a planar movement during the battery pack propulsion process;

[0106] The side support plates 11 are arranged along the second direction, the second direction is the Z-axis direction in the figure, the second direction is perpendicular to the first direction, and the side support plates 11 are fixedly connected to the side parts of the bottom support plate 12.

[0107] The bottom support plate 12 and the side support plate 11 may be integrally formed to form a profile, or the bottom support plate 12 and the side support plate 11 may be separately formed and fixedly connected by welding.

[0108] In one embodiment, if Figure 4 , Figure 5 , Figure 6 As shown, the bottom beam also includes:

[0109] The guide block 13 is fixedly connected to the side support plate 11 or the bottom support plate 12. The horizontal cross section of the guide block 13 is trapezoidal or arc-shaped. The side surface of the guide block 13 forms a slope for guiding the rolling beam to slide.

[0110] The guide block 13 in the figure can be fixedly connected to the side support plate 11 by bolts. When the rolling beam slides on the bottom cross beam, the end of the rolling beam contacts the side of the guide block 13 and is pushed by the guide block 13 so that the rolling beam keeps moving in a straight line, ensuring that the rolling device 27 and the slot 14 can be accurately engaged and matched, and can also avoid jamming during the sliding process.

[0111] In one embodiment, if Figure 5 , Figure 6 , Figure 7 As shown, the rolling beam includes: a bottom plate 21, a first side plate 22, a second side plate 23 and a top plate 24;

[0112] The bottom plate 21 is arranged along a first direction, which is the Y-axis direction in the figure. The width of the bottom plate 21 is smaller than the width of the bottom support plate 12, so that the rolling beam can be fully supported by the bottom cross beam. The bottom surface of the bottom plate 21 is the bottom surface of the rolling beam, which is a plane.

[0113] The first side plate 22 is arranged along the second direction, the second direction 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 the first side plate 22 is close to the side support plate 11;

[0114] The second side plate 23 is arranged along a second direction, the second direction being the Z-axis direction in the figure, and the second side plate 23 is fixedly connected to the second side of the bottom plate 21;

[0115] The top plate 24 is arranged along a first direction, which is the Y-axis direction in the figure. A first side of the top plate 24 is fixedly connected to the first side plate 22 , and a second side of the top plate 24 is fixedly connected to the second side plate 23 .

[0116] The bottom plate 21, the first side plate 22, the second side plate 23 and the top plate 24 can be made in one piece to form a profile, or can be made in separate pieces and fixedly connected by welding.

[0117] In one embodiment, if Figure 8 , Fig. 9 , Fig.10 As shown, the rolling device 27 includes: a positioning block 271 and a roller 273;

[0118] The positioning block 271 is suitable for being installed 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, and the receiving groove 272 is recessed from the bottom of the positioning block 271 to the inside of the positioning block 271.

[0119] The roller 273 is arranged in the accommodating groove 272 and can rotate in the accommodating groove 272. The axial direction of the roller 273 is arranged along the first direction, and the first direction is the Y-axis direction in the figure. Part of the circumferential surface of the roller 273 can protrude from the bottom of the positioning block 271. This arrangement is to be able to enter the slot 14 of the bottom beam and realize the snap connection with the slot 14.

[0120] In one embodiment, if Figure 7 , Fig.12 As shown, the bottom plate 21 of the rolling beam is provided with a plurality of limiting grooves 28 along the length direction, the positioning block 271 is provided in the limiting groove 28, and a part of the circumferential surface of the roller 273 can protrude from the bottom surface of the bottom plate 21, so as to enter the clamping groove 14 of the bottom cross beam and realize clamping with the clamping groove 14. The limiting groove 28 penetrates the bottom plate 21 of the rolling beam, and the size of the limiting groove 28 is adapted to the positioning block 271, and the positioning block 271 is provided in the limiting groove 28 and will not shake.

[0121] In one embodiment, if Fig.11 , Fig.12 As shown, the second side plate 23 of the rolling beam is provided with a plurality of second connection holes 29 , and a fifth bolt 277 is provided in the second connection hole 29 to connect the positioning block 271 , so as to ensure that the position of the positioning block 271 in the rolling beam does not change.

[0122] In one embodiment, if Fig.10 , Fig.11 As shown, the maximum diameter of the roller 273 is smaller than the diameter of the receiving groove 272 , and the roller 273 can rotate flexibly in the receiving groove 272 .

[0123] In one embodiment, if Figure 6 , Figure 7 As shown, the slot 14 of the bottom cross beam is provided with a slope on the side where the roller 273 enters. This arrangement facilitates the roller 273 to smoothly enter the slot 14 without causing a sudden drop impact, and also facilitates the roller 273 to slide out of the slot 14 smoothly when the battery pack is pulled out of the energy storage device.

[0124] In one embodiment, if Figure 8 , Fig. 9 , Fig.10 , Fig.11 As shown, the rolling device 27 further includes: a first stopper 274 and a second stopper 278;

[0125] The first stopper 274 is disposed at the first end of the receiving groove 272 and is used to fix the first end of the roller 273 so that the first end of the roller 273 can be retained in the receiving groove 272;

[0126] The second stopper 278 is disposed at the second end of the receiving groove 272 for fixing the second end of the roller 273 so that the second end of the roller 273 can be retained in the receiving groove 272 .

[0127] The first stopper 274 and the second stopper 278 may be polygonal, sector-shaped or arc-shaped. In the figure, the first stopper 274 and the second stopper 278 are sector-shaped, and the sector angle is greater than 180 degrees. A limiting protrusion 275 is provided on the circumferential surface of the first stopper 274, and the limiting protrusion 275 is engaged with the positioning block 271 to prevent the first stopper 274 from rotating in the receiving groove 272. The second stopper 278 adopts the same anti-rotation structure.

[0128] In one embodiment, if Figure 8 , Fig. 9 , Fig.10 , Fig.11 As shown, the rolling device 27 further includes: a first bearing 276 and a second bearing 279;

[0129] The first bearing 276 is disposed in the first stopper 274 to support the first end of the roller 273 to rotate;

[0130] The second bearing 279 is disposed in the second stopper 278 to support the second end of the roller 273 to rotate.

[0131] In one embodiment, the first bearing 276 and the second bearing 279 are both sliding bearings with a relatively small radial dimension, so as to be conveniently disposed in the first stopper 274 and the second stopper 278 , respectively.

[0132] In one embodiment, if Fig.11 As shown, the distance between the axis of the receiving 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, the maximum diameter of the roller 273 is φ1, and 0.5*φ1>R≥r. Through this arrangement, it can be ensured that part of the circumferential surface of the roller 273 can protrude from the bottom of the positioning block 271, so that it can enter the clamping groove 14 of the bottom beam and realize clamping with the clamping groove 14.

[0133] In one embodiment, if Fig. 9 , Fig.11As shown, the roller 273 has a stepped shaft structure, and the roller 273 includes: a first shaft section 2731, a second shaft section 2732, and a third shaft section 2733;

[0134] The first shaft section 2731 is located in the middle of the roller 273, and the diameter of the first shaft section 2731 is φ1;

[0135] The second shaft section 2732 is arranged at the first end of the first shaft section 2731, and the diameter of the second shaft section 2732 is φ2;

[0136] The third shaft section 2733 is arranged at the second end of the first shaft section 2731, and the diameter of the third shaft section 2733 is φ2;

[0137] φ1 > φ2. With this setting, it is convenient for the two ends of the roller 273 to be respectively connected to the first bearing 276 and the second bearing 279.

[0138] In one embodiment, as Fig.11 、 Fig.13 shown, the length of the first shaft section 2731 is d, and the plurality of rolling devices 27 include at least three rollers 273 with different lengths d. The at least three rollers 273 with different lengths d increase from the first end to the second end of the rolling beam. The total length of the roller 273 in the figure is D, and D > d. The first end of the rolling beam corresponds to the first end of the bottom cross beam, and the second end of the rolling beam corresponds to the second end of the bottom cross beam.

[0139] Correspondingly, the plurality of card slots 14 include at least three card slots 14 with different slotting lengths, and the at least three card slots 14 with different slotting lengths increase from the first end to the second end of the bottom cross beam.

[0140] The length of the card slot 14 corresponds to the length d of the roller 273 in the rolling device 27, and at the same time, it satisfies that the slotting width is less than the maximum diameter φ1 of the roller 273, and the slotting length d1 < d2 = d3 =... = dn - 1 < dn, where d1 is the slotting length of the card slot 14 at the first end position, and dn is the slotting length of the card slot 14 at the second end position.

[0141] With this setting, the roller 273 rolls through the card slots 14 on the bottom cross beam in sequence. At this time, the first roller 273 to pass through is the roller 273 at the second end of the rolling beam, corresponding to the card slot 14 at the first end of the bottom cross beam. The length d of the roller 273 is greater than the length d1 of the encountered card slot 14, and the roller 273 will not get stuck (engage) due to encountering the card slot 14, resulting in difficult insertion. Except for the roller 273 at the first end of the rolling beam, the other rollers 273 are also greater than the length d1 of the encountered card slot 14.

[0142] Similarly, as the rolling beam slides, the roller 273 at the second end of the rolling beam is also greater than the length d2, d3, ..., dn-1 of the slot 14 encountered, and the roller 273 will not sink (get engaged) when encountering the slot 14. The roller 273 will not sink (get engaged) in the corresponding slot 14 until it reaches the slot 14 of length dn.

[0143] After the battery pack reaches the specified position, all rollers 273 coincide with the position of the slot 14, and all rollers 273 are simultaneously sunken into the slot 14. The rollers 273 no longer make vertical contact with the bottom beam, and all rollers 273 unload the battery pack load. The lower surface of the rolling beam contacts the supporting surface of the bottom beam, which prevents the heavy battery pack from pressing on the rollers 273 for a long time, causing structural deformation of the parts contacted by the rollers 273.

[0144] In one embodiment, if Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the top plate 24 of the rolling beam is provided with a plurality of first connection holes 26 , and first bolts 30 are provided in the first connection holes 26 to connect the battery pack, and in the figure, the water cooling plate 100 of the battery pack is connected.

[0145] In one embodiment, if Figure 7 , Fig.12 As shown, the bottom plate 21 of the rolling beam is provided with a mounting hole 90 corresponding to the first connecting hole 26 , and the disassembly tool disassembles the bolt or nut through the mounting hole 90 .

[0146] In one embodiment, if Figure 1 , Figure 2 As shown, a bending portion 25 is provided at the end of the top plate 24 of the rolling beam, and the bending portion 25 is used to limit the position of the battery pack, so as to facilitate the rolling beam to be accurately installed at the bottom of the battery pack.

[0147] In one embodiment, if Figure 1 , Figure 2 , Figure 3 As shown, a second bolt 40 is provided near the end of the bottom plate 21 of the rolling beam to connect the bottom support plate 12 of the bottom cross beam. Multiple second bolts 40 can be provided at both ends of the bottom plate 21, and the bottom plate 21 and the bottom support plate 12 are provided with connection holes accordingly. After the battery pack has completed sliding in the energy storage device, the second bolt 40 can be installed to ensure that the battery pack does not move arbitrarily in the energy storage device. When the battery pack needs to be pulled out, the second bolt 40 needs to be removed first.

[0148] like Figure 1 , Figure 2 , Figure 3As shown, an embodiment of the present invention further provides a battery pack, comprising: at least two rolling beams, the two rolling beams are symmetrically arranged at the bottom of the battery pack, and the rolling beams are provided with multiple rolling devices 27, and the rolling devices 27 are used to be engaged with the slots 14 of the energy storage battery rack beam assembly described in any one of the above embodiments.

[0149] The figure only shows the water cooling plate 100 of the battery pack, and a coolant can flow through the water cooling plate 100 to adjust the temperature of the battery pack. The rolling beam is symmetrically arranged at the bottom of the water cooling plate 100. The other structures of the battery pack can refer to the prior art and will not be described in detail here.

[0150] like Figure 1 , Figure 2 , Figure 3 As shown, an embodiment of the present invention further provides an energy storage device, comprising:

[0151] Battery pack;

[0152] In the energy storage battery rack cross beam assembly described in any one of the above embodiments, the rolling beam of the energy storage battery rack cross beam assembly is arranged at the bottom of the battery pack, and the battery pack is arranged on the bottom cross beam of the energy storage battery rack cross beam assembly.

[0153] The energy storage device includes an even number of energy storage battery rack beam assemblies, which can be divided into multiple layers. The bottom beams of the two energy storage battery rack beam assemblies in each layer are symmetrically arranged to jointly support a battery pack.

[0154] According to an energy storage battery rack crossbeam assembly, battery pack and energy storage device of the present invention, by setting a rolling beam at the bottom of the battery pack and a bottom crossbeam in the energy storage device, the rolling beam can slide on the bottom crossbeam, reducing friction resistance, facilitating the disassembly and assembly of the battery pack in the energy storage device, and the rolling beam forms a large support area for the battery pack, effectively avoiding damage to the structure of the battery pack. When the rolling beam slides to a predetermined position on the bottom crossbeam, the bottom surface of the rolling beam contacts the support surface of the bottom crossbeam, forming a stable support structure that no longer relies on the rolling device for support, thereby improving the stability of the battery pack in the energy storage device and avoiding deformation or damage to the rolling device and parts in contact with the rolling device.

[0155] The processes and steps described in all the above preferred embodiments are only examples. Unless adverse effects occur, various processing operations can be performed in a sequence different from the sequence of the above processes. The sequence of steps in the above processes can also be increased, merged or deleted according to actual needs.

[0156] In understanding the scope of the present invention, the term "comprise" and its derivatives as used herein are intended to be open terms, which specify the existence of recorded features, elements, components, groups, wholes and / or steps, but do not exclude the existence of other unrecorded features, elements, components, groups, wholes and / or steps. This concept also applies to words with similar meanings, such as the terms "include", "have" and their derivatives.

[0157] The terms "attached" or "attached" as used herein include: a configuration where an element is directly secured to another element by directly securing the element to the other element; a configuration where an element is indirectly secured to another element by securing the element to an intermediate member which in turn is secured to the other element; and a configuration where one element is integral with the other element, i.e., one element is substantially a part of the other element. This definition also applies to words with similar meanings such as "connect," "connect," "couple," "mount," "bond," "fix," and their derivatives. Finally, terms of degree such as "substantially," "approximately," and "approximately" as used herein represent the amount of deviation that modifies the term such that the end result will not be significantly changed.

[0158] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. The features described herein in one embodiment may be applied to another embodiment individually or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

[0159] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims

1. A crossbeam assembly for an energy storage battery rack, characterized in that: include: A bottom cross beam, wherein the bottom cross beam is provided with a plurality of slots (14) along a length direction, the lengths of the plurality of slots (14) increasing from a first end to a second end of the bottom cross beam, the first end being an entry end, the second end being a stop end, and the length direction of the slots (14) being perpendicular to the length direction of the bottom cross beam; A rolling beam, wherein the rolling beam is provided with a plurality of rolling devices (27), the plurality of rolling devices (27) being respectively capable of being engaged with the plurality of engaging grooves (14), the rolling beam sliding from a first end of the bottom cross beam into an upper portion of the bottom cross beam, and stopping sliding when sliding to a second end of the bottom cross beam; The spacing between the plurality of the card slots (14) increases in sequence from the first end to the second end of the bottom cross beam, and the spacing between the plurality of the rolling devices (27) matches the spacing between the plurality of the card slots (14); The rolling device (27) is capable of supporting the rolling beam to slide on the bottom cross beam, and during the sliding process, a gap exists between the bottom surface of the rolling beam and the supporting surface of the bottom cross beam. When the rolling beam slides to a predetermined position, the rolling device (27) engages with the engaging groove (14), and the bottom surface of the rolling beam contacts the supporting surface of the bottom cross beam.

2. The energy storage battery rack crossbeam assembly according to claim 1, characterized in that: The bottom cross beam is provided with at least three different lengths of the clamping slots (14), and the at least three different lengths of the clamping slots (14) increase from the first end to the second end of the bottom cross beam.

3. The energy storage battery rack crossbeam assembly according to claim 1, characterized in that: The bottom cross beam comprises: A bottom support plate (12), the bottom support plate (12) being arranged along a first direction, the clamping groove (14) being arranged on the bottom support plate (12), and the top surface of the bottom support plate (12) being a support surface of the bottom cross beam; A side support plate (11), the side support plate (11) being arranged along a second direction, the second direction being perpendicular to the first direction, the side support plate (11) being fixedly connected to a side portion of the bottom support plate (12).

4. The energy storage battery rack crossbeam assembly according to claim 3, characterized in that: The bottom cross beam also includes: A guide block (13), the guide block (13) being fixedly connected to the side support plate (11) or the bottom support plate (12), the horizontal cross section of the guide block (13) being trapezoidal or arc-shaped, and being used to guide the rolling beam to slide.

5. The energy storage battery rack crossbeam assembly according to claim 3, characterized in that: The rolling beam comprises: A bottom plate (21), the bottom plate (21) being arranged along a first direction, the width of the bottom plate (21) being smaller than the width of the bottom support plate (12), and the bottom surface of the bottom plate (21) being the bottom surface of the rolling beam; a first side plate (22), the first side plate (22) being arranged along the second direction, the first side plate (22) being fixedly connected to a first side of the bottom plate (21), and the first side plate (22) being close to the side support plate (11); a second side plate (23), the second side plate (23) being arranged along a second direction, the second side plate (23) being fixedly connected to a second side of the bottom plate (21); A top plate (24), the top plate (24) being arranged along a first direction, a first side of the top plate (24) being fixedly connected to the first side plate (22), and a second side of the top plate (24) being fixedly connected to the second side plate (23).

6. The energy storage battery rack crossbeam assembly according to claim 5, characterized in that: The rolling device (27) comprises: a positioning block (271), the positioning block (271) being suitable for being installed between the first side plate (22) and the second side plate (23), and a receiving groove (272) being provided at the bottom of the positioning block (271); A roller (273), the roller (273) being arranged in the accommodating groove (272) and being capable of rotating in the accommodating groove (272), the axial direction of the roller (273) being arranged along a first direction, and a part of the circumferential surface of the roller (273) being capable of protruding from the bottom of the positioning block (271).

7. The energy storage battery rack crossbeam assembly according to claim 6, characterized in that: The bottom plate (21) of the rolling beam is provided with a plurality of limit grooves (28) along the length direction, the positioning block (271) is arranged in the limit groove (28), and a part of the circumferential surface of the roller (273) can protrude from the bottom surface of the bottom plate (21), so as to enter the clamping groove (14) of the bottom cross beam and realize clamping connection with the clamping groove (14).

8. The energy storage battery rack crossbeam assembly according to claim 6, characterized in that: The second side plate (23) of the rolling beam is provided with a plurality of second connection holes (29), and fifth bolts (277) are provided in the second connection holes (29) to connect the positioning block (271).

9. The energy storage battery rack crossbeam assembly according to claim 6, characterized in that: The maximum diameter of the roller (273) is smaller than the diameter of the accommodating groove (272).

10. The energy storage battery rack crossbeam assembly according to claim 6, characterized in that: The clamping groove (14) of the bottom cross beam is provided with a slope on the side where the roller (273) enters.

11. The energy storage battery rack crossbeam assembly according to claim 6, characterized in that: The rolling device (27) further comprises: a first stopper (274), the first stopper (274) being arranged at a first end of the accommodating groove (272) and being used to fix a first end of the roller (273); A second stopper (278), the second stopper (278) being arranged at the second end of the accommodating groove (272) and being used to fix the second end of the roller (273).

12. The energy storage battery rack crossbeam assembly according to claim 11, characterized in that: The rolling device (27) further comprises: a first bearing (276), the first bearing (276) being arranged in the first stopper (274) to support the first end of the roller (273) to rotate; A second bearing (279), the second bearing (279) is arranged in the second stopper (278) to support the second end of the roller (273) to rotate.

13. The energy storage battery rack crossbeam assembly according to claim 12, characterized in that: The first bearing (276) and the second bearing (279) are both sliding bearings.

14. The energy storage battery rack crossbeam assembly according to claim 12, 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, the maximum diameter of the roller (273) is φ1, and 0.5*φ1>R≥r.

15. The energy storage battery rack crossbeam assembly according to claim 6, characterized in that: The roller (273) comprises: a first shaft segment (2731), the first shaft segment (2731) being located in the middle of the roller (273), and the diameter of the first shaft segment (2731) being φ1; a second shaft segment (2732), the second shaft segment (2732) being arranged at the first end of the first shaft segment (2731), the diameter of the second shaft segment (2732) being φ2; A third shaft segment (2733), the third shaft segment (2733) being arranged at the second end of the first shaft segment (2731), and the diameter of the third shaft segment (2733) being φ2; φ1>φ2.

16. The energy storage battery rack crossbeam assembly according to claim 15, characterized in that: The length of the first shaft section (2731) is d, and the plurality of rolling devices (27) include at least three rollers (273) of different lengths d, and the at least three rollers (273) of different lengths d increase from the first end to the second end of the rolling beam.

17. The energy storage battery rack crossbeam assembly according to claim 5, characterized in that: The top plate (24) of the rolling beam is provided with a plurality of first connection holes (26), and bolts are provided in the first connection holes (26) for connecting the battery pack.

18. The energy storage battery rack crossbeam assembly according to claim 17, characterized in that: The bottom plate (21) of the rolling beam is provided with a mounting hole (90) corresponding to the first connecting hole (26), and a disassembly tool is used to disassemble and assemble the bolt or nut through the mounting hole (90).

19. The energy storage battery rack crossbeam assembly according to claim 5, characterized in that: A bending portion (25) is provided at the end of the top plate (24) of the rolling beam, and the bending portion (25) is used to limit the position of the battery pack.

20. A battery pack, characterized in that: include: At least two rolling beams of the energy storage battery rack cross beam assembly according to any one of claims 1 to 19, the two rolling beams are symmetrically arranged at the bottom of the battery pack, and the rolling device (27) of the rolling beam is used to engage with the slot (14) of the bottom cross beam of the energy storage battery rack cross beam assembly according to any one of claims 1 to 19.

21. An energy storage device, characterized in that: include: Battery pack; The energy storage battery rack crossbeam assembly according to any one of claims 1 to 19, wherein the rolling beam of the energy storage battery rack crossbeam assembly 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 assembly.

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