A battery cluster bracket, energy storage device and container energy storage system

Abstract

The present invention provides a battery cluster bracket, an energy storage device and a container energy storage system, characterized in that it includes a cluster bracket body, the cluster bracket body has a first end and a second end, the first end is the end of the cluster bracket body close to the ground, and the second end is the end of the cluster bracket body away from the ground; a plurality of guide supports, the plurality of guide supports are arranged on the cluster bracket body along the direction from the first end to the second end, and each guide support body is provided with a plurality of force-bearing rolling bodies in the length direction L, each guide support body is connected to the cluster bracket body, and the force-bearing rolling bodies are used to roll against the battery pack. At the same time, an energy storage device using the battery cluster bracket and a container energy storage system using the energy storage device are also disclosed, which improves the technical problem that the existing battery pack is difficult to disassemble and assemble on the existing battery cluster bracket.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a battery cluster bracket, an energy storage device and a container energy storage system. Background Art

[0002] As the capacity of battery packs increases, their weight also increases, and they can basically only be installed and removed with the help of tools. At present, energy storage battery packs are generally installed by forklifts or tooling. During the installation process, the battery packs inevitably slide into place on the battery cluster bracket. Due to the large friction between the two, this not only makes the installation process time-consuming and labor-intensive, but also damages the anti-corrosion layer on the contact surface of the two due to friction.

[0003] As for the on-site disassembly of the battery pack, there is basically no better disassembly solution due to the simple tools and limited operating space. For example, if the battery pack is directly pulled out, the friction resistance between the battery pack and the battery cluster bracket is large, so the external force required to directly pull out the battery pack is too large, and the tensile strength of the battery pack is very high.

[0004] Disadvantages of using a forklift to install the battery pack: space for the fork tines to operate must be left between the battery packs, and the application scenario is limited by the length of the fork tines. The detailed analysis is as follows:

[0005] 1) Space for forklift tines is reserved at the bottom of each layer of battery packs, so that all battery packs can be quickly installed and removed by a forklift. However, the space utilization rate is not high, which increases the cost and reduces the energy density of the system. Basically, no manufacturer adopts this solution.

[0006] 2) No space is left for the fork teeth at the bottom of the battery pack. The fork teeth will occupy the space of the next battery pack. The battery pack can only be installed from top to bottom and removed from bottom to top. The workload of disassembling the battery pack on site is too large, and the bottom layer can only be installed by push installation, which greatly increases the difficulty of assembly. In order to reduce the difficulty of push installation, some manufacturers install lightweight high-voltage boxes, PCS and other electrical equipment at the bottom layer of the battery cluster bracket, but the protection level of these electrical equipment is not high, and condensation water is easily entered at the bottom of the battery cluster bracket. This arrangement sacrifices the safety of the energy storage system.

[0007] 3) To reduce system losses, the DC side voltage level is getting higher and higher, the insulation distance from the battery cluster to the container wall will increase, and the size of the battery pack is also increasing. However, due to the limited length of the fork teeth, it is impossible to install the battery pack in place with a forklift, and an additional push-installation method is required. Summary of the invention

[0008] The embodiments of the present invention provide a battery cluster bracket, an energy storage device and a container energy storage system, which can improve the technical problem that the existing battery pack is difficult to disassemble and assemble on the existing battery cluster bracket.

[0009] In a first aspect, an embodiment of the present invention provides a battery cluster support, comprising:

[0010] A cluster support body, the cluster support body having a first end and a second end, the first end being an end of the cluster support body used to be close to the ground, and the second end being an end of the cluster support body used to be away from the ground;

[0011] A plurality of guide support bodies are arranged on the cluster bracket body along the direction from the first end to the second end, and a plurality of force-bearing rolling bodies are provided in the length direction L of each guide support body. Each guide support body is connected to the cluster bracket body, and the force-bearing rolling body is used for rolling and abutting the battery pack.

[0012] In one embodiment, the guide support body includes a connecting portion and a supporting portion protruding from the connecting portion, the force-bearing rolling body is movably connected to the supporting portion, and the force-bearing rolling body at least partially protrudes from the supporting portion, and the connecting portion is connected to the cluster bracket body.

[0013] In one embodiment, the support portion is connected to the connection portion in an inclined manner toward the second end.

[0014] In one embodiment, the supporting portion includes a first member and a second member arranged opposite to each other, a gap space is formed between the first member and the second member, the force-bearing rolling body is partially embedded in the gap space and abuts against the second member, an end of the first member away from the connecting portion is connected to an end of the second member away from the connecting portion, and at least one of the first member and the second member is connected to the connecting portion.

[0015] In one embodiment, the connecting portion includes a first connecting member and a second connecting member arranged at intervals, the interval between the first connecting member and the second connecting member is connected to the gap space, the first member is connected to the first connecting member, the second member is connected to the second connecting member, and the first connecting member and the second connecting member are connected to the cluster bracket body.

[0016] In one embodiment, the first component, the second component, the first connecting member, and the second connecting member are integrally formed, and the first component is bent and connected to the first connecting member, the second component is bent and connected to the second connecting member, and the first component is bent and connected to the second component.

[0017] In one embodiment, the first member is arranged horizontally, and the second member is inclined toward the second end side relative to the connecting portion.

[0018] In one embodiment, the angle formed between the first component and the second component is a bending angle, and the angle range of the bending angle is 5° to 10°.

[0019] In one embodiment, a smooth layer is disposed on the side of the second component that is in contact with the force-bearing rolling element.

[0020] In a second aspect, an embodiment of the present invention provides an energy storage device, comprising:

[0021] The battery cluster bracket mentioned above;

[0022] A battery pack, wherein the battery pack is disposed on the guide support body of the battery cluster support, and the battery pack is rollingly connected to the guide support body through the force-bearing rolling body;

[0023] A box body, wherein at least part of the space of the inner cavity of the box body is configured as a battery compartment, the battery cluster bracket is arranged in the battery compartment, and the battery cluster bracket is connected to the box body.

[0024] In one embodiment, a rolling guide groove is provided on the battery pack, the extension direction of the rolling guide groove is consistent with the length direction L of the guide support body, and the rolling guide groove is used to rollingly connect the force-bearing rolling body.

[0025] In one embodiment, the roughness of the inner groove surface of the rolling guide groove abutting against the force-bearing rolling body is greater than the roughness of the side surface of the guide support body abutting against the force-bearing rolling body.

[0026] In one embodiment, a accommodating space is further provided on the battery pack. The accommodating space is provided on the inner side of the rolling guide groove. The depth dimension of the accommodating space is greater than the depth dimension of the rolling guide groove. The accommodating space is used to accommodate the corresponding force-bearing rolling body.

[0027] In one embodiment, each of the guide support bodies is correspondingly configured with a rolling guide groove, and each of the rolling guide grooves is configured with a plurality of the accommodating spaces. The spacing between two adjacent accommodating spaces is defined as an accommodating spacing. Along the extension direction of the rolling guide groove, two adjacent accommodating spacings are unevenly distributed.

[0028] In one embodiment, each of the guide support bodies is correspondingly configured with a plurality of the rolling guide grooves, each of the rolling guide grooves is configured with one accommodating space, and the plurality of accommodating spaces are evenly arranged along the length direction L of the guide support body.

[0029] In one embodiment, a buffer elastic member is further provided on the battery pack, and the buffer elastic member is arranged in the accommodating space. The buffer elastic member is deformed to provide buffering when the force-bearing rolling body moves into the accommodating space, and is deformed and restored to provide power when the force-bearing rolling body moves out of the accommodating space.

[0030] In one embodiment, a sliding guide portion is further provided between the accommodating space and the rolling guide groove, and the sliding guide portion is used to guide the force-bearing rolling body to slide between the accommodating space and the rolling guide groove.

[0031] In one embodiment, the ball radius R1 of the force-bearing rolling body, the plate thickness T of the first component of the guide support body, the spacing height H1 of the gap space of the guide support body, and the groove depth H2 of the rolling guide groove meet the following relationship:

[0032] R1H1+T+H2.<h1>

[0033] In a third aspect, an embodiment of the present invention provides a container energy storage system, comprising:

[0034] The energy storage device described above; and

[0035] A transfer device, wherein rolling elements are evenly distributed on the top of the transfer device or a plurality of roller elements are evenly arranged, and the transfer device is used to transfer the battery pack to a guide support body corresponding to the energy storage device.

[0036] Beneficial effects of the embodiments of the present invention:

[0037] In the embodiment of the present invention, by arranging a force-bearing rolling body on the guide support body, the friction resistance between the battery box and the battery cluster support can be greatly reduced, thereby improving the technical problem that the existing battery pack is difficult to disassemble and assemble on the existing battery cluster support. At the same time, under the rolling support of the force-bearing rolling body, the battery box will not directly contact the battery cluster support, thereby effectively avoiding the risk of wear or scratching the anti-corrosion layer on the outer surface of the battery box, and effectively improving the safety of the battery pack and its energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 is a structural diagram of a guide support body in a battery cluster support provided by an embodiment of the present invention;

[0040] Figure 2 is a cross-sectional view of a guide support body in a battery cluster support provided by an embodiment of the present invention;

[0041] Figure 3 is a force diagram of a guide support body in a battery cluster support provided by an embodiment of the present invention;

[0042] Figure 4 is a schematic diagram of assembling a battery cluster support provided by an embodiment of the present invention;

[0043] Figure 5 is a first state assembly diagram of an energy storage device provided by an embodiment of the present invention;

[0044] Figure 6 yes Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0045] Figure 7 yes Figure 5 A first lateral assembly schematic diagram of

[0046] Figure 8 yes Figure 7 A partial enlarged schematic diagram of point C in the middle;

[0047] Fig. 9 is a second state assembly diagram of the energy storage device provided by an embodiment of the present invention;

[0048] Fig.10 yes Fig. 9 A partial enlarged schematic diagram of point E in the middle;

[0049] Fig.11 yes Fig. 9 A second lateral assembly schematic diagram of the present invention;

[0050] Fig.12 yes Fig.11 A partial enlarged schematic diagram of point F in the middle;

[0051] Fig.13 is a partially enlarged schematic diagram of a battery pack in an energy storage device provided by an embodiment of the present invention;

[0052] Fig.14 is a first distribution diagram of a force-bearing rolling body in an energy storage device provided by an embodiment of the present invention;

[0053] Fig.15 is a second distribution diagram of a force-bearing rolling body in an energy storage device provided by an embodiment of the present invention;

[0054] Fig.16 is a partial explosion schematic diagram of an energy storage device provided by an embodiment of the present invention;

[0055] Fig.17 It is a schematic diagram of the overall structure of a container energy storage system provided by an embodiment of the present invention.

[0056] Icons: 1-guide support body, 11-connecting part, 111-first connecting piece, 112-second connecting piece, 12-supporting part, 121-first component, 122-second component, 123-gap space, 131-first bending piece, 132-second bending piece, 133-third bending piece, 141-through mounting port, 142-positioning hole, 2-cluster bracket body, 3-force-bearing rolling body, 4-battery pack, 41-rolling guide groove, 42-accommodating space, 43-buffering elastic member, 5-box, 6-transfer device, 61-roller member. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device.

[0058] The present invention discloses an energy storage device, which adopts electrochemical energy storage technology. With its advantages of high controllability, high modularity, high energy density, high conversion efficiency, and easy installation, it has become one of the most promising energy storage technology routes in the field of new energy storage. The energy storage device includes a battery module, a battery management system (BMS) for monitoring and evaluating the battery status and balancing and improving the utilization rate of the energy storage battery, an energy management system (EMS) for overall monitoring and energy scheduling, an energy storage inverter (PCS) for controlling the charging and discharging of the energy storage battery, a thermal management system, and other control hardware. Among them, the above-mentioned battery module includes a plurality of battery packs 4 connected in series and parallel, and the battery pack 4 serves as an electrochemical energy storage unit of the energy storage device.

[0059] Please refer to the specific Fig.17 As shown, the energy storage device also includes a box body 5 and a battery cluster bracket. The interior of the box body 5 is provided with a battery compartment, and the battery cluster bracket is arranged in the battery compartment of the box body 5. The plurality of battery packs 4 mentioned above can be detachably installed on the battery cluster bracket, so that the plurality of battery packs 4 can be neatly and compactly assembled in the box body 5, thereby improving the high energy density of the energy storage device and facilitating troubleshooting and maintenance.

[0060] Among them, Fig.17 As shown, the box body 5 includes a box body top panel, a box body base member for installation and fixation on the ground, and a plurality of box body side panels. The box body top panel and the box body base member are relatively distributed, and the plurality of box body side panels are arranged between the box body top panel and the box body base member. The box body top panel and the box body base member are both connected to each box body side panel member, and the box body top panel, the box body base member and the plurality of box body side panels cooperate to form a box body inner cavity, and at least part of the space of the box body inner cavity is configured as the above-mentioned battery compartment.

[0061] Please refer to the specific Fig.17 As shown, the battery cluster bracket comprises a cluster bracket body 2 and a plurality of guide supports 1. The cluster bracket body 2 has a first end and a second end. The direction in which the first end extends toward the second end is a first direction A. The first end is an end of the cluster bracket body 2 that is close to the ground, and the second end is an end of the cluster bracket body 2 that is away from the ground. During installation, the first direction A is perpendicular to the ground. The first end of the cluster bracket body 2 is connected to the box base member of the box 5, and the second end of the cluster bracket body 2 is connected to the box top plate member of the box 5. To enhance the stability of the assembly, the cluster bracket body 2 can also be optionally connected to the box side plate member of the box 5. The plurality of guide supports 1 are arranged on the cluster bracket body 2 along the first direction A, and each guide support 1 is connected to the cluster bracket body 2. The connection here can be bolted, can be clamped, can be welded, or can be a combination of any two of the above three connection methods. Each battery pack 4 will slide into the battery compartment under the guidance of the guide support 1 and be placed on the guide support 1, so that the battery pack 4 can be stably stressed by the guide support 1.

[0062] For example, please combine Figure 1 , Figure 2 , Figure 4 and Fig.16 As shown, a plurality of positioning holes 142 are provided on the guide support body 1. The positioning holes 142 can be selected as rectangular holes, circular holes, or cross holes. The positioning holes 142 can be used for installing bolts to pre-install the guide support body 1 to the cluster bracket body 2. The positioning holes 142 can also be used to increase the welding length between the guide support body 1 and the cluster bracket body 2, and strengthen the welding firmness between the guide support body 1 and the cluster bracket body 2.

[0063] The core point of this embodiment is that Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Fig. 9 and Fig.10 As shown, each guide support body 1 is provided with a plurality of force-bearing rolling bodies 3 in the length direction L, and the force-bearing rolling bodies 3 are used for rolling against the battery pack 4 , so that rolling friction is formed between the battery pack 4 and the guide support body 1 .

[0064] Such arrangement, on the one hand, avoids direct contact between the guide support body 1 and the battery pack 4. Compared with the sliding friction formed between the battery pack 4 and the guide support body 1, the battery pack 4 uses the force-bearing rolling body 3 to achieve rolling friction between the battery pack 4 and the guide support body 1, which can greatly reduce the contact area and friction coefficient between the battery pack 4 and the guide support body 1, thereby being able to very effectively reduce the friction resistance during the relative movement of the battery pack 4 and the guide support body 1, making it easier to assemble the battery pack 4 to the battery cluster bracket, improving the assembly efficiency, simplifying the disassembly and assembly method and assembly tools of the battery pack 4 to the battery cluster bracket, and being very beneficial to the disassembly and assembly of the battery pack 4 in the compact battery compartment of the box body 5, thereby greatly reducing the difficulty of the operation.

[0065] On the other hand, the battery pack 4 does not come into direct contact with the guide support 1, so the battery pack 4 does not need to add or save lubricant. At the same time, the surface of the battery pack 4 will not be worn or scratched during the relative movement between the battery pack 4 and the guide support 1. When the battery pack 4 is placed on the guide support 1 of the battery cluster bracket, it will not touch or bump against the guide support 1, thereby avoiding the risk of wear or falling of the anti-corrosion layer on the outside of the battery pack 4, ensuring and improving the safety performance of the battery pack 4 and the energy storage device during use. In addition, the surface accuracy (surface roughness) and processing accuracy of the guide support 1 can be reduced, and the manufacturing requirements of the battery pack 4 in terms of tensile strength are also reduced, effectively reducing the production cost of the battery cluster bracket and the energy storage device.

[0066] In addition, from the perspective of the overall economic benefits of the energy storage device, the force-bearing rolling body 3 is arranged on the guide support body 1, which can reduce the number of force-bearing rolling bodies 3 compared to the method of arranging the force-bearing rolling body 3 on the battery pack 4. Since the energy storage device usually needs to be equipped with a large number of battery packs 4, each battery pack 4 is equipped with a force-bearing rolling body 3, and it is ensured that the battery pack 4 is smoothly transferred to the battery compartment of the box body 5. The large number of force-bearing rolling bodies 3 used will lead to too high production costs for the battery pack 4 and the energy storage device. Moreover, when it is necessary to replace the battery pack 4 in the energy storage device, an ordinary battery pack 4 can be replaced, and the specific battery pack 4 provided with the force-bearing rolling body 3 does not need to be replaced. Therefore, arranging the force-bearing rolling body 3 on the guide support body 1 can greatly reduce the number of force-bearing rolling bodies 3, thereby significantly reducing the production cost of the energy storage device.

[0067] In some embodiments, please refer to Figure 1 , Figure 2 , Figure 4 , Figure 6 and Fig.10As shown, the guide support body 1 includes a connection portion 11 and a support portion 12 protruding from the connection portion 11, the support portion 12 is inclined to the connection portion 11 and extends toward the second end of the cluster support body 2, and the force-bearing rolling body 3 is movably connected to the end of the support portion 12, and the protruding direction of the support portion 12 of the guide support body 1 will be inclined to the cluster support body 2, then the end of the support portion 12 acts on the battery pack 4 to support the battery pack 4. Alternatively, the support portion 12 of the guide support body 1 is perpendicular to the connection portion 11 of the guide support body 1, and the connection portion 11 cooperates with the support portion 12 to form a T-shaped structure or an L-shaped structure, then when the connection portion 11 of the guide support body 1 abuts against the cluster support body 2, the protruding direction of the support portion 12 of the guide support body 1 will be perpendicular to the cluster support body 2. The force-bearing rolling body 3 is movably connected to the support portion 12 toward the second end of the cluster support body 2, then the battery pack 4 will also be stressed on the support portion 12 of the guide support body 1. The support portion 12 and the connection portion 11 may be connected by welding or may be integrally formed, thereby ensuring the structural strength of the guide support body 1 and the battery cluster support, thereby improving the stability and safety of the battery cluster support.

[0068] For example, please refer to Fig.17 As shown, the connecting portion 11 of the guide support body 1 is connected to the cluster support body 2, and the connection here can be bolted, snap-fitted, a combination of bolted and snap-fitted, or welded. In order to avoid direct contact between the guide support body 1 and the battery pack 4, the force-bearing rolling body 3 at least partially protrudes from the supporting portion 12 of the guide support body 1, so that a gap is formed between the battery pack 4 and the supporting portion 12 of the guide support body 1.

[0069] In the above, under the action of the force-bearing rolling body 3, the friction between the battery pack 4 and the support portion 12 of the guide support body 1 can be greatly reduced, which facilitates the disassembly and assembly of the battery pack 4 and effectively protects the anti-corrosion layer on the outer surface of the battery pack 4 from wear and damage. However, the force-bearing rolling body 3 has a certain height / thickness, which leads to the problem that the force-bearing rolling body 3 will occupy more space in the battery compartment and reduce the energy density of the system. Regarding the problem that the force-bearing rolling body 3 occupies more space, the inventor also provides a further solution:

[0070] Please combine the specific Figure 1 , Figure 2 , Figure 4 , Figure 6 and Fig.10As shown, the support portion 12 comprises a first member 121 and a second member 122 arranged opposite to each other, wherein the first member 121 and the second member 122 are spaced apart to form a gap space 123, wherein the first member 121 is provided with a through-mounting opening 141 corresponding to the force-bearing rolling body 3, wherein the force-bearing rolling body 3 here can be selected as a ball, and the radius of the through-mounting opening 141 is adapted to the ball radius of the force-bearing rolling body 3, or the radius of the through-mounting opening 141 is greater than the ball radius of the force-bearing rolling body 3. When the force-bearing rolling body 3 is mounted to the support portion 12, the force-bearing rolling body 3 passes through the through-mounting opening 141 of the first member 121, and the force-bearing rolling body 3 is partially embedded in the gap space 123 and abuts against the second member 122.

[0071] Such a configuration not only stably installs and constrains the force-bearing rolling body 3 on the support portion 12, but also realizes the purpose of movably connecting the force-bearing rolling body 3 to the guide support body 1. At the same time, since the force-bearing rolling body 3 is partially embedded in the gap space 123 of the support portion 12, the height of the force-bearing rolling body 3 exposed outside the support portion 12 is reduced, thereby greatly reducing the space occupied by the force-bearing rolling body 3, improving the space utilization rate of the battery compartment, and effectively solving the problem that the force-bearing rolling body 3 will occupy more space in the battery compartment, thereby effectively improving the energy density of the system.

[0072] In some embodiments, please refer to Figure 1 , Figure 2 , Figure 4 , Figure 6 and Fig.10 As shown, one end of the first member 121 away from the connection portion 11 is connected to one end of the second member 122 away from the connection portion 11, for example, one end of the first member 121 away from the connection portion 11 is directly connected to one end of the second member 122 away from the connection portion 11, or one end of the first member 121 away from the connection portion 11 is connected and fixed to one end of the second member 122 away from the connection portion 11 through a third member. Both the first member 121 and the second member 122 are connected to the connection portion 11, and one of the first member 121 and the second member 122 can be connected to the connection portion 11, and the other of the first member 121 and the second member 122 abuts against the cluster bracket body 2. In this way, a gap space 123 can be formed between the first member 121 and the second member 122.

[0073] In addition to the above-mentioned method, in other embodiments, the first component 121 and the second component 122 that are arranged relatively to each other can be abutted against each other, and the first component 121 and the second component 122 can be welded and connected. At this time, the force-bearing rolling body 3 is partially embedded in the through-mounting opening 141 of the first component 121. According to the structural design and design requirements, the thickness of the first component 121 can be adjusted to deepen the depth of the through-mounting opening 141. In this way, the height of the force-bearing rolling body 3 exposed outside the support part 12 can also be reduced, thereby reducing the space occupied by the force-bearing rolling body 3, improving the space utilization rate of the battery compartment, and solving the problem that the force-bearing rolling body 3 will occupy more space in the battery compartment.

[0074] In other embodiments, the first component 121 and the second component 122 can be stacked and integrally formed. In this case, according to the structural design and design requirements, the stacking thickness of the first component 121 and the second component 122 is adjusted to deepen the depth of the through-mounting opening 141. It is also possible to achieve the purpose of partially embedding the force-bearing rolling body 3 in the through-mounting opening 141 of the first component 121 to reduce the height of the force-bearing rolling body 3 exposed outside the support portion 12.

[0075] In some embodiments, please refer to Figure 1 , Figure 2 , Figure 4 , Figure 6 and Fig.10 As shown, the above-mentioned connecting part 11 includes a first connecting member 111 and a second connecting member 112 which are arranged at intervals, a first component 121 connects the first connecting member 111, the interval between the first connecting member 111 and the second connecting member 112 is connected to the above-mentioned gap space 123, the second component 122 connects the second connecting member 112, and the first connecting member 111 and the second connecting member 112 are connected to the cluster bracket body 2, so that the first component 121 and the second component 122 can both be stably subjected to force on the connecting part 11.

[0076] For example, Figure 1 As shown, the above-mentioned multiple positioning holes 142 are arranged on the first connecting member 111 of the connecting part 11, and each positioning hole 142 is respectively arranged corresponding to each through mounting opening 141, so as to well cope with the impact of the battery pack 4 on the force-bearing rolling body 3 when the battery pack 4 is placed on the supporting part 12 of the guiding support body 1.

[0077] In some embodiments, please refer to Figure 1 , Figure 2 , Figure 4 , Figure 6 and Fig.10As shown, the first component 121, the second component 122, the first connecting member 111, and the second connecting member 112 are integrally formed, and the first component 121 and the first connecting member 111 are bent to form a first bending member 131, the second component 122 and the second connecting member 112 are bent to form a second bending member 132, and the first component 121 and the second component 122 are bent to form a third bending member 133, so that the guide support body 1 can have good comprehensive performance. The guide support body 1 is preferably made of a material with high bending strength. In this way, the resultant force formed by the stresses in the first bending part 131, the second bending part 132 and the third bending part 133 will be able to offset and balance the force applied from the outside. That is, the battery pack 4 acts on the force-bearing rolling body 3. At this time, the force-bearing rolling body 3 generates a vertical downward pressure on the second component 122. The resultant force formed by the first bending part 131, the second bending part 132 and the third bending part 133 will balance the pressure, thereby further improving the structural strength and bearing capacity of the guide support body 1.

[0078] In some embodiments, please refer to Figure 2 , Figure 3 and Figure 4 , the second component 122 is inclined toward the second end of the cluster bracket body 2 to the second connecting piece 112 of the connecting portion 11. When the force-bearing rolling body 3 abuts against the second connecting piece 112, the force-bearing rolling body 3 will be tangent to the second connecting piece 112. With such a configuration, the guide support body 1 is easier to bend and form the second component 122, and the deformation of the third bending piece 133 is reduced, so that the guide support body 1 is not prone to the problem of cracking the plate during the bending process. At the same time, when the first component 121 is subjected to vertical downward pressure, the second component 122 can be equivalent to a support rod to play a supporting role. In this way, not only can the bearing capacity of the guide support body 1 in the vertical direction be increased, but also the shear stress on the first component 121 can be reduced, thereby eliminating the structure of the reinforcing ribs.

[0079] It should be noted that the force-bearing rolling body 3 adopts a ball, so no additional fixing structure is required to install the ball, which is not only convenient for the force-bearing rolling body 3 to be assembled to the support portion 12 of the guide support body 1, but also convenient for the subsequent inspection and replacement of the force-bearing rolling body 3 after long-term use, which greatly improves the assembly efficiency and reduces the difficulty of maintenance. In addition, the force-bearing rolling body 3 can also roll in multiple directions, which is conducive to adjusting the assembly position of the battery pack 4 in multiple directions, and when the force-bearing rolling body 3 is slightly deformed in one direction, the force-bearing rolling body 3 can also be deflected so that the force-bearing rolling body 3 can continue to be used, thereby improving the service life of the force-bearing rolling body 3.

[0080] In addition, the unexpected effect is that when the force-bearing rolling body 3 is subjected to the vertical downward force of the battery pack 4, it will be decomposed into a positive pressure component perpendicular to the second member 122 and a downward force component parallel to the second member 122. Since the positive pressure component perpendicular to the second member 122 is smaller than the vertical downward force of the battery pack 4 on the force-bearing rolling body 3, the static friction / rolling resistance between the force-bearing rolling body 3 and the second member 122 can be made smaller, and the downward force component will provide a rolling force in another direction (not the direction in which the battery pack 4 moves forward) to the force-bearing rolling body 3. At this time, when the force-bearing rolling body 3 adopts a ball, since the force-bearing rolling body 3 can be adjusted to roll in multiple directions, the rolling force will help overcome the rolling resistance.

[0081] It should also be noted that in addition to the use of balls as the force-bearing rolling bodies 3 as mentioned above, the force-bearing rolling bodies 3 can also be selected as rollers, and the axles of the rollers are plugged and fixed to the support portion 12 of the guide support body 1, so that the force-bearing rolling bodies 3 can be movably connected to the support portion 12, and the battery pack 4 can form rolling friction with the guide support body 1 through the force-bearing rolling bodies 3.

[0082] Exemplarily, the first member 121 is arranged horizontally, and the angle formed between the first member 121 and the second member 122 is the bending angle, and the angle range of the bending angle is 5°~10°. When the angle range of the bending angle exceeds 10°, the angle of the bending angle is large, which will cause the support portion 12 of the guide support body 1 to be relatively high in the first direction A, resulting in an increase in the space occupied by the support portion 12 of the guide support body 1 in the first direction A. When the angle range of the bending angle is less than 5°, the angle of the bending angle is too small, so that the bearing force of the support portion 12 of the guide support body 1 in the vertical direction is greatly reduced, and the supporting effect is greatly weakened. Therefore, the angle range of the bending angle is within the range of 5°~10°, and the support portion 12 of the guide support body 1 can have good bearing force and supporting effect in the case of relatively less space occupied, and under the same vertical downward pressure, the larger the angle of the bending angle, the better the supporting effect, and the smaller the tension or pressure on the support portion 12 of the guide support body 1. The bending angle is preferably 8°, 9°, or 10°.

[0083] In some embodiments, the side of the second component 122 that contacts the force-bearing rolling body 3 is provided with a smooth layer, that is, the side of the second component 122 that contacts the force-bearing rolling body 3 is smoothed, such as polished. In this way, the static friction force / rolling resistance between the force-bearing rolling body 3 and the second component 122 can be reduced, and the smoothness of the force-bearing rolling body 3 during rotation can be improved.

[0084] In some embodiments, please refer to Figures 5 to 13As shown, a rolling guide groove 41 is provided on the battery pack 4, and the extension direction of the rolling guide groove 41 is consistent with the length direction L of the guide support body 1. The rolling guide groove 41 is provided at the bottom of the battery pack 4, and the rolling guide groove 41 is rollingly connected to the force-bearing rolling body 3. With such a configuration, under the cooperation of the rolling guide groove 41 and the force-bearing rolling body 3, not only the rolling path of the force-bearing rolling body 3 is limited, but also the battery pack 4 can be accurately guided to slide along the length direction L of the guide support body 1. At the same time, since the force-bearing rolling body 3 is embedded in the rolling guide groove 41, the space occupied by the force-bearing rolling body 3 can be further reduced, the space utilization rate of the battery compartment is improved, and it is beneficial to further improve the energy density of the energy storage device. In addition, since the force-bearing rolling body 3 is embedded in the rolling guide groove 41, the contact area between the two can be effectively increased, the pressure is reduced, and it will be beneficial to extend the service life of the force-bearing rolling body 3 and the battery pack 4.

[0085] In some embodiments, the roughness of the inner groove surface of the rolling guide groove 41 that abuts against the force-bearing rolling body 3 is greater than the roughness of the side surface of the guide support body 1 that abuts against the force-bearing rolling body 3, that is, the inner groove surface of the rolling guide groove 41 is roughened to increase the static friction and avoid relative movement between the battery pack 4 and the force-bearing rolling body 3.

[0086] In some embodiments, please refer to Figures 5 to 13 As shown, a accommodating space 42 is also provided on the battery pack 4, and the accommodating space 42 is provided on the inner side of the rolling guide groove 41, and the rolling guide groove 41 extends in the first direction A toward the groove depth direction thereof to form the accommodating space 42, then the depth dimension of the accommodating space 42 is greater than the depth dimension of the rolling guide groove 41, and the accommodating space 42 is used to accommodate the corresponding force-bearing rolling body 3, that is, the number of the accommodating spaces 42 is configured to be multiple, and the multiple accommodating spaces 42 are arranged and distributed along the extension direction of the rolling guide groove 41, the number of the accommodating spaces 42 is the same as the number of the force-bearing rolling bodies 3, and each accommodating space 42 is provided corresponding to each force-bearing rolling body 3, and the shape and size of the accommodating space 42 can be selected to be compatible with the shape and size of the force-bearing rolling body 3, of course, the shape and size of the accommodating space 42 can be selected to be larger than the shape and size of the force-bearing rolling body 3 within the assembly tolerance range.

[0087] In this way, the accommodation space 42 can be utilized to accommodate the force-bearing rolling body 3 in the accommodation space 42. At the same time, the force-bearing rolling body 3 is constrained in the accommodation space 42, and the battery pack 4 can be more firmly installed and fixed on the guide support body 1 with the above-mentioned anti-slip layer. In addition, the following unexpected technical effects are also achieved:

[0088] 1. The force-bearing rolling body 3 only works when the battery pack 4 is disassembled and assembled. When the battery pack 4 is installed in place, since the force-bearing rolling body 3 is in the accommodating space 42, the force-bearing rolling body 3 will not be stressed / deformed, thereby effectively extending the service life of the force-bearing rolling body 3.

[0089] 2. After the battery pack 4 is installed in place, the battery pack 4 will fall directly on the support portion 12 of the guide support body 1, so that the contact area between the battery pack 4 and the guide support body 1 is larger, so that the sliding friction between the battery pack 4 and the guide support body 1 is restored, and the battery pack 4 is installed more smoothly. In this way, when the energy storage device is transferred and transported as a whole, the battery pack 4 will be able to cooperate with the transport limit fixture and the accommodating space 42 to effectively avoid the risk of the battery pack 4 moving along the length direction L of the guide support body 1 when it shakes during transportation, greatly improving the safety and stability of the energy storage device during the overall transfer and transportation, which is conducive to reducing the limit requirements and protection requirements of the transport limit fixture, and reducing the risk of transportation damage.

[0090] It should be noted that, during the installation and disassembly process of the battery pack 4, when only one load-bearing rolling body 3 is arranged between the battery pack 4 and the supporting portion 12 of the guide support body 1, due to the gravity of the battery pack 4 itself, the bottom of the battery pack 4 will fall on the supporting portion 12 during the movement, so that sliding friction is formed between the battery pack 4 and the supporting portion 12, which can easily cause wear on the outer surface of the battery pack 4. Therefore, the number of the above-mentioned accommodating spaces 42 should be at least three.

[0091] It should also be noted that the number of the above-mentioned rolling guide groove 41 can be configured as one, that is, each guide support body 1 is correspondingly configured with a rolling guide groove 41, and each rolling guide groove 41 is configured with multiple accommodating spaces 42. Of course, the number of force-bearing rolling bodies 3 configured on the guide support body 1 is also configured as multiple, and the force-bearing rolling bodies 3 are correspondingly arranged with the accommodating spaces 42, that is, the number and positions of the force-bearing rolling bodies 3 are correspondingly arranged with the number and positions of the accommodating spaces 42.

[0092] like Fig.14 As shown, in order to prevent the force-bearing rolling body 3 of the battery pack 4 from falling into other accommodating spaces 42 during the relative movement between the battery pack 4 and the guide support body 1, the spacing between two adjacent accommodating spaces 42 is defined as the accommodating spacing. Then, along the extension direction of the rolling guide groove 41, the two adjacent accommodating spacings are unevenly distributed, that is, the two adjacent accommodating spacings are not equal or there is no multiple relationship. For example, the first accommodating spacing L1, the second accommodating spacing L2, the third accommodating spacing L3, and the fourth accommodating spacing L4 are all unequal and have a multiple relationship. Then, through the limitation of the above-mentioned accommodating spacing, as the battery pack 4 slides on the guide support body 1, at most only one force-bearing rolling body 3 falls into the accommodating space 42 at the same time. Therefore, there are still two or more force-bearing rolling bodies 3 on one side of the bottom of the battery pack 4 to roll and support the battery pack 4, so as to ensure that the rolling friction is always maintained between the battery pack 4 and the guide support body 1, thereby ensuring the smooth disassembly and assembly of the battery pack 4.

[0093] In addition, the number of the rolling guide grooves 41 can be configured to be multiple, that is, each guide support body 1 is correspondingly configured with multiple rolling guide grooves 41, and each rolling guide groove 41 is configured with an accommodation space 42. Fig.15 As shown, in order to prevent the stressed rolling body 3 from falling into other accommodating spaces 42 during the relative movement between the battery pack 4 and the guide support body 1, multiple accommodating spaces 42 are evenly arranged along the length direction L of the guide support body 1, that is, the accommodating spacing between the accommodating spaces 42 of two adjacent rolling guide grooves 41 is equal. In this way, each stressed rolling body 3 only rolls in the corresponding rolling guide groove 41, that is, it will only move to the corresponding accommodating space 42 when the battery pack 4 is in place, and will not be affected by the accommodating spaces 42 of other rolling guide grooves 41, so that the entire installation and disassembly process is very smooth.

[0094] In some embodiments, a sliding guide is further provided between the accommodation space 42 and the rolling guide groove 41, and the sliding guide is used to guide the force-bearing rolling body 3 to slide between the accommodation space 42 and the rolling guide groove 41. The sliding guide here can be a chamfered structure or a rounded structure, so that the force-bearing rolling body 3 can move very smoothly into the accommodation space 42, reducing the impact during the movement to the accommodation space 42. At the same time, it can also reduce the resistance when the force-bearing rolling body 3 moves out of the accommodation space 42, better guide the force-bearing rolling body 3 out of the accommodation space 42, and further improve the convenience of the battery pack 4 during the disassembly and assembly process.

[0095] In some embodiments, please refer to Fig.13 As shown, a buffer elastic member 43 is also provided on the battery pack 4. The buffer elastic member 43 may be a spring or a buffer member with good elastic properties. The buffer elastic member 43 is arranged in the accommodating space 42, that is, the buffer elastic member 43 is installed and fixed on the cavity wall of the accommodating space 42 in the groove depth direction of the rolling guide groove 41. The buffer elastic member 43 is deformed to provide buffering when the force-bearing rolling body 3 moves to the accommodating space 42, and the deformation is restored to provide power when the force-bearing rolling body 3 moves out of the accommodating space 42.

[0096] That is, when the force-bearing rolling body 3 moves to the accommodation space 42, the force-bearing rolling body 3 will abut against the buffer elastic member 43, causing the buffer elastic member 43 to produce elastic deformation, and convert the kinetic energy of the force-bearing rolling body 3 into the internal energy of the buffer elastic member 43, so that under the action of the buffer elastic member 43, the impact force generated in the process of the force-bearing rolling body 3 sliding from the rolling guide groove 41 to the inside of the accommodation space 42 can be effectively eliminated. When the force-bearing rolling body 3 moves out of the accommodation space 42, the force-bearing rolling body 3 will separate from the buffer elastic member 43, and under the action of the deformation recovery of the buffer elastic member 43, the internal energy of the force-bearing rolling body 3 is converted into kinetic energy and transmitted to the force-bearing rolling body 3, so that the force-bearing rolling body 3 can be better and easier to leave the accommodation space 42.

[0097] In some embodiments, please refer to Figure 4 and Figure 6 As shown, the ball radius R1 of the force-bearing rolling body 3, the plate thickness T of the first component 121 of the guide support body 1, the spacing height H1 of the gap space 123 of the guide support body 1 and the groove depth H2 of the rolling guide groove 41 meet the following relationship:

[0098] R1H1+T+H2.<h1>

[0099] By using the above relationship, it is possible to ensure that more than half of the force-bearing rolling body 3 is embedded in the gap space 123 of the guide support body 1 and the through installation opening 141, and only partially expose the through installation opening 141, and the force-bearing rolling body 3 is not easy to be separated from the through installation opening 141, thereby ensuring the stability of the assembly of the force-bearing rolling body 3. At the same time, the contact area between the rolling guide groove 41 on the battery pack 4 and the force-bearing rolling body 3 is increased, the pressure is reduced, and the service life of the force-bearing rolling body 3 is increased.

[0100] It should also be noted that the gap space 123 of the guide support body 1 passes through the end of the support portion 12 of the guide support body 1, so that the loaded rolling body 3 can be lifted out from the side of the rolling guide groove 41 close to the bottom of the groove, thereby achieving the convenience of replacing the loaded rolling body 3.

[0101] In some embodiments, a handle may be provided on the battery pack 4 to provide pulling force during the removal of the battery pack 4 , so that the battery pack 4 can slide on the guide support 1 more easily and smoothly.

[0102] Based on the structure of the above-mentioned energy storage device and its connection relationship, the inventor also disclosed a container energy storage system, including an energy storage device and a transfer device 6, wherein the transfer device 6 can be selected as a mobile cart with adjustable height, wherein the top of the mobile cart is evenly distributed with rolling elements (such as rollers or balls) or a plurality of roller elements 61 are evenly arranged, and the battery pack 4 is placed on the top of the transfer device 6. Under the action of the transfer device 6, the battery pack 4 will be lifted to the height of the guide support body 1 corresponding to the energy storage device, and then the battery pack 4 will be moved toward one side of the energy storage device, so that the transfer device 6 is used to transfer the battery pack 4 to the guide support body 1 corresponding to the energy storage device.

[0103] On the one hand, the assembler only needs to place the battery pack 4 on the top of the transfer device 6 to accurately transfer the battery pack 4 toward the guide support body 1 corresponding to the energy storage device, which minimizes the difficulty of the assembler's work, thereby achieving the purpose of further reducing the difficulty of assembling the battery pack 4 during the process of assembling it to the energy storage device without reducing the assembly accuracy.

[0104] On the other hand, under the action of the rolling member or roller member 61 on the top of the transfer device 6, rolling friction is also generated between the battery pack 4 and the transfer device 6 during the process of transferring the battery pack 4 toward the guide support body 1 corresponding to the energy storage device. In this way, compared with the method of using a forklift, the problem of wear or scratches on the battery pack 4 during the forklift transportation can be very effectively avoided.

[0105] In addition, since the transfer device 6 cooperates with the force-bearing rolling body 3 in the energy storage device, it will avoid the forklift tines extending into the battery cluster bracket of the energy storage device, so there is no need to consider reserving space for the forklift tines at the bottom of each layer of battery pack 4, which is very beneficial to improving the space utilization rate and system energy density of the energy storage device.

[0106] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery cluster bracket, characterized in that: include: A cluster support body (2), the cluster support body (2) having a first end and a second end, the first end being an end of the cluster support body (2) used to be close to the ground, and the second end being an end of the cluster support body (2) used to be away from the ground; A plurality of guide support bodies (1), the plurality of guide support bodies (1) being arranged on the cluster support body (2) along the direction from the first end to the second end, a plurality of force-bearing rolling bodies (3) being provided in the length direction L of each guide support body (1), each guide support body (1) being connected to the cluster support body (2), and the force-bearing rolling body (3) being used for rolling against the battery pack (4); The guide support body (1) comprises a connecting portion (11) and a supporting portion (12) protruding from the connecting portion (11), the supporting portion (12) comprising a first component (121) and a second component (122) arranged opposite to each other, and the connecting portion (11) comprises a first connecting member (111) and a second connecting member (112) arranged at intervals; The first component (121), the second component (122), the first connecting piece (111), and the second connecting piece (112) are integrally formed, and the first component (121) is connected to the first connecting piece (111) by bending, the second component (122) is connected to the second connecting piece (112) by bending, and the first component (121) is connected to the second component (122) by bending.

2. The battery cluster support according to claim 1, characterized in that: The force-bearing rolling body (3) is movably connected to the supporting portion (12), and the force-bearing rolling body (3) at least partially protrudes from the supporting portion (12), and the connecting portion (11) is connected to the cluster bracket body (2).

3. The battery cluster support according to claim 2, characterized in that: The supporting portion (12) is connected to the connecting portion (11) in an inclined manner toward the second end.

4. The battery cluster support according to claim 2 or 3, characterized in that: A gap space (123) is formed between the first member (121) and the second member (122); the load-bearing rolling body (3) is partially embedded in the gap space (123) and abuts against the second member (122); an end of the first member (121) away from the connecting portion (11) is connected to an end of the second member (122) away from the connecting portion (11); and at least one of the first member (121) and the second member (122) is connected to the connecting portion (11).

5. The battery cluster support according to claim 4, characterized in that: The interval between the first connecting member (111) and the second connecting member (112) is connected to the gap space (123); the first member (121) is connected to the first connecting member (111); the second member (122) is connected to the second connecting member (112); and the first connecting member (111) and the second connecting member (112) are connected to the cluster bracket body (2).

6. The battery cluster support according to claim 4, characterized in that: The first component (121) is arranged horizontally, and the second component (122) is inclined toward the second end side relative to the connecting portion (11).

7. The battery cluster support according to claim 6, characterized in that: The angle formed between the first component (121) and the second component (122) is a bending angle, and the angle range of the bending angle is 5° to 10°.

8. The battery cluster support according to any one of claims 5 to 7, characterized in that: A smooth layer is provided on the side of the second component (122) that is in abutment with the load-bearing rolling body (3).

9. An energy storage device, characterized in that: include: A battery cluster support as claimed in any one of claims 1 to 8; A battery pack (4), the battery pack (4) being arranged on a guide support body (1) of the battery cluster support, the battery pack (4) being rollingly connected to the guide support body (1) via the force-bearing rolling body (3); A box body (5), wherein at least part of the space in the inner cavity of the box body (5) is configured as a battery compartment, the battery cluster bracket is arranged in the battery compartment, and the battery cluster bracket is connected to the box body (5).

10. The energy storage device according to claim 9, characterized in that: The battery pack (4) is provided with a rolling guide groove (41), the extension direction of the rolling guide groove (41) is consistent with the length direction L of the guide support body (1), and the rolling guide groove (41) is used for rolling connection with the force-bearing rolling body (3).

11. The energy storage device according to claim 10, characterized in that: The roughness of the inner groove surface of the rolling guide groove (41) abutting against the force-bearing rolling body (3) is greater than the roughness of the side surface of the guide support body (1) abutting against the force-bearing rolling body (3).

12. The energy storage device according to claim 10 or 11, characterized in that: The battery pack (4) is also provided with a receiving space (42), the receiving space (42) being arranged on the inner side of the rolling guide groove (41), the depth dimension of the receiving space (42) being greater than the depth dimension of the rolling guide groove (41), and the receiving space (42) being used to receive the corresponding force-bearing rolling body (3).

13. The energy storage device according to claim 12, characterized in that: Each of the guide support bodies (1) is correspondingly provided with a rolling guide groove (41), and each of the rolling guide grooves (41) is provided with a plurality of the accommodation spaces (42), and the spacing between two adjacent accommodation spaces (42) is defined as the accommodation spacing, and along the extension direction of the rolling guide grooves (41), the two adjacent accommodation spacings are unevenly distributed.

14. The energy storage device according to claim 12, characterized in that: Each of the guide support bodies (1) is correspondingly provided with a plurality of the rolling guide grooves (41), each of the rolling guide grooves (41) is provided with a receiving space (42), and along the length direction L of the guide support body (1), the plurality of receiving spaces (42) are evenly arranged.

15. The energy storage device according to claim 12, characterized in that: The battery pack (4) is also provided with a buffer elastic member (43), which is arranged in the accommodating space (42). The buffer elastic member (43) is deformed to provide buffering when the force-bearing rolling body (3) moves to the accommodating space (42), and is deformed and restored to provide power when the force-bearing rolling body (3) moves out of the accommodating space (42).

16. The energy storage device according to claim 12, characterized in that: A sliding guide portion is also provided between the accommodating space (42) and the rolling guide groove, and the sliding guide portion is used to guide the force-bearing rolling body (3) to slide between the accommodating space (42) and the rolling guide groove (41).

17. The energy storage device according to claim 12, characterized in that: The ball radius R1 of the force-bearing rolling body (3), the plate thickness T of the first component (121) of the guide support body (1), the spacing height H1 of the gap space (123) of the guide support body (1), and the groove depth H2 of the rolling guide groove (41) conform to the following relationship: R1<H1+T, 2*R1>H1+T+H2.

18. A container energy storage system, characterized in that: include: The energy storage device according to any one of claims 9 to 17; as well as A transfer device (6), wherein rolling elements are evenly distributed on the top of the transfer device (6) or a plurality of roller elements (61) are evenly arranged, and the transfer device (6) is used to transfer the battery pack (4) to a guide support body (1) corresponding to the energy storage device.

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