Liquid cooling energy storage box and energy storage cabinet

Abstract

The utility model provides a liquid cooling energy storage box and an energy storage cabinet. The liquid cooling energy storage box comprises a box body, a bottom plate and a plurality of roller assemblies, and a battery containing groove is formed in the box body; the bottom plate is provided with a notch of the battery accommodating groove and is used for bearing a battery; the plurality of roller assemblies are arranged on the bottom plate; the bottom plate is a liquid cooling plate, a plurality of limiting mounting grooves are formed in the face, away from the box body, of the liquid cooling plate, the limiting mounting grooves are formed in the moving direction of the box body at intervals, and the roller assemblies are correspondingly arranged in the limiting mounting grooves one by one; each roller assembly protrudes out of the liquid cooling plate, and the two ends of each roller assembly are rotationally connected with the groove wall of the corresponding limiting installation groove. When the liquid cooling energy storage box bears weight, the lateral directions of the rolling wheel assemblies are limited by the groove walls of the limiting installation grooves respectively, the influence of partial lateral pressure can be offset, the situation that the rolling wheel assemblies fall off is effectively avoided, and meanwhile the liquid cooling plate transmits heat to the outside of the liquid cooling energy storage box in a heat conduction mode to accelerate heat dissipation.

Description

Technical Field

[0001] The present disclosure relates to the technical field of energy storage and heat dissipation equipment, and in particular to a liquid-cooled energy storage box and an energy storage cabinet. Background Art

[0002] Energy storage boxes are outdoor power distribution equipment, mainly used to supply power to residential areas and industrial parks. As the demand for electricity continues to increase, the volume of energy storage boxes and the number of battery components placed in the energy storage boxes are also increasing, making the energy storage boxes weigh more than 400kg. The energy storage boxes are assembled in energy storage cabinets by manual manpower. The energy storage boxes are too heavy and inconvenient to assemble. Some manufacturers have also noticed this problem.

[0003] For example, Chinese patent document CN218300081U discloses a battery pack and energy storage device, including a box body and two battery pack mounting assemblies, the two battery pack mounting assemblies are arranged at intervals in the left-right direction, the battery pack mounting assembly includes a roller and a roller mounting frame, the roller mounting frame is fixed to the box body, the axle of the roller is extended in the left-right direction, the outer peripheral surface of the roller is used to cooperate with the rolling support of the support frame on the cabinet, so as to reduce the friction resistance between the battery pack and the support frame during the installation of the battery pack and improve the assembly efficiency of the battery pack.

[0004] However, the design of the above battery pack and energy storage device has the following problems:

[0005] Although the battery pack and energy storage device are installed on the roller mounting frame so that the operator can directly push the box to assemble it, the roller is mainly fixed to the side wall of the roller mounting frame through the axle. When there are many batteries placed in the box, the roller will form lateral pressure due to the bearing force, and the axle and roller will easily fall off from the side wall of the roller mounting frame, making it difficult to use for loads above 400kg. At the same time, as the battery components in the battery pack increase, the battery components are very likely to accumulate a lot of heat in the box during the charging and discharging process, which can easily cause safety accidents. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a liquid-cooled energy storage box and energy storage cabinet with fast heat dissipation and large weighing capacity.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A liquid-cooled energy storage box comprises a box body, a bottom plate and a plurality of roller assemblies, wherein the box body is provided with a battery receiving slot; the bottom plate is provided with a notch of the battery receiving slot, and the bottom plate is used to carry the battery; and a plurality of the roller assemblies are arranged on the bottom plate;

[0009] The bottom plate is a liquid cooling plate, and a plurality of limit mounting grooves are provided on a side of the liquid cooling plate away from the box body. The plurality of limit mounting grooves are arranged at intervals along the moving direction of the box body, and each of the roller assemblies is arranged in each of the limit mounting grooves in a corresponding manner; each of the roller assemblies protrudes from the liquid cooling plate, and both ends of each of the roller assemblies are rotatably connected to the groove wall of the corresponding limit mounting groove.

[0010] In one embodiment, the roller assembly includes a roller and an axle, the roller is arranged in the limiting mounting groove, the groove wall of the limiting mounting groove is respectively provided with a first positioning rotating hole and a second positioning rotating hole at positions opposite to the two ends of the roller, the roller is provided with a rotating through hole, and the axle passes through the first positioning rotating hole, the rotating through hole and the second positioning rotating hole in sequence.

[0011] In one embodiment, the axle is detachably connected to the first positioning rotating hole, the rotating through hole and the second positioning rotating hole respectively.

[0012] In one embodiment, the wheel axle is a screw or a bolt, the wheel axle is connected to the rotating through hole via a bearing, the first positioning rotating hole is a screw hole and / or the second positioning rotating hole is a screw hole.

[0013] In one of the embodiments, the wheel surface of the roller extends out of the notch of the limit mounting groove, and the maximum distance between the wheel surface of the roller and the liquid cooling plate is in the range of 1.3 mm to 1.7 mm.

[0014] In one of the embodiments, a wear-resistant ring is provided on the wheel surface of the roller.

[0015] In one embodiment, the outer surface of the wear-resistant ring is provided with anti-slip textures.

[0016] In one embodiment, the anti-slip pattern includes a plurality of guide plain patterns and resistance-increasing twill patterns, wherein the plurality of guide plain patterns are arranged in a circle at intervals in the middle portion of the wear-resistant ring; the resistance-increasing twill patterns are arranged at both ends of the wear-resistant ring and are inclined to the central axis of the roller.

[0017] In one embodiment, the plurality of roller assemblies are divided into two groups, namely a first rolling group and a second rolling group; the first rolling group and the second rolling group are respectively arranged at two opposite sides of the liquid cooling plate.

[0018] An energy storage cabinet comprises the liquid-cooled energy storage box of any one of the above embodiments.

[0019] Compared with the prior art, the present invention has at least the following advantages:

[0020] 1) Because the liquid cooling plate is provided with a plurality of limit installation grooves on the side away from the box body, by making each roller assembly correspond to each other in each limit installation groove, the roller assembly is constrained in the limit installation groove as a whole, and at the same time, a plurality of limit installation grooves are arranged at intervals along the moving direction of the box body, and each roller assembly protrudes from the liquid cooling plate. When the above-mentioned liquid cooling energy storage box is assembled in the energy storage cabinet, the weight will be dispersed at each roller assembly, and the roller assembly supports the liquid cooling plate to avoid direct friction between the liquid cooling plate and the energy storage cabinet, and the two ends of each roller assembly are respectively connected to the corresponding groove wall of the limit installation groove, so that the assembly can be more conveniently realized by hand pushing. Compared with the traditional battery pack and energy storage device, the two ends of each roller assembly are connected to the groove wall of the installation groove. When bearing weight, the lateral direction of the roller assembly is respectively limited by the groove wall of the limit installation groove, which can offset the influence of part of the lateral pressure and effectively avoid the situation that the roller assembly falls off, and is more suitable for bearing weights of more than 400kg.

[0021] 2) Because the bottom plate is a liquid cooling plate, the bottom plate is arranged at the notch of the battery receiving slot. When the battery is arranged in the battery receiving slot, the battery will be in direct contact with the liquid cooling plate. While carrying the battery, the liquid cooling plate can absorb the heat generated by the battery during the charging and discharging process. The liquid cooling plate transfers the heat to the outside of the liquid cooling energy storage box through heat conduction to accelerate the heat dissipation, which can effectively avoid the problem of overheating of the box and ultimately reduce the possibility of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic structural diagram of a liquid-cooled energy storage box according to an embodiment of the present disclosure;

[0024] Figure 2 for Figure 1 A transverse cross-sectional view of the roller assembly of the liquid-cooled energy storage box shown in the installation state;

[0025] Figure 3 for Figure 1 A longitudinal sectional view of the roller assembly of the liquid-cooled energy storage box shown in the installation state;

[0026] Figure 4 for Figure 1 A schematic structural diagram of a roller assembly of a liquid-cooled energy storage box is shown;

[0027] Figure 5 The figure is a schematic diagram of the structure of an energy storage cabinet according to an embodiment of the present disclosure.

[0028] Figure numerals: 10, energy storage cabinet; 100, liquid-cooled energy storage box; 110, box body; 1110, battery accommodating slot; 120, roller assembly; 1210, roller; 1211, rotating through hole; 1220, axle; 1221, first end; 1222, second end; 1230, bearing; 12a, first rolling group; 12b, second rolling group; 130, liquid cooling plate; 1310, limit installation groove; 1311, first positioning rotary hole; 1312, second positioning rotary hole; 1313, first side; 1314, second side; 1315, first reinforcing beam; 1316, second reinforcing beam; 140, wear-resistant ring; 1410, anti-slip texture; 1411, guide plain texture; 1412, resistance-increasing twill texture; 200, partition. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0033] like Figure 1 and Figure 2As shown, a liquid-cooled energy storage box 100 of an embodiment includes a box body 110, a bottom plate and a plurality of roller assemblies 120, wherein a battery receiving groove 1110 is provided on the box body 110; a notch of the battery receiving groove 1110 is provided on the bottom plate, and the bottom plate is used to carry the battery; a plurality of roller assemblies 120 are arranged on the bottom plate; the bottom plate is a liquid cooling plate 130, and a plurality of limiting mounting grooves 1310 are provided on a surface of the liquid cooling plate 130 away from the box body 110, and the plurality of limiting mounting grooves 1310 are arranged at intervals along the moving direction of the box body 110, and each roller assembly 120 is arranged in each limiting mounting groove 1310 one by one; each roller assembly 120 protrudes from the liquid cooling plate 130, and the two ends of each roller assembly 120 are rotatably connected to the groove wall of the corresponding limiting mounting groove 1310 respectively.

[0034] It can be understood that, because the liquid cooling plate 130 is provided with a plurality of limit installation grooves 1310 on a surface away from the box body 110, by making each roller assembly 120 correspondingly arranged in each limit installation groove 1310 one by one, the roller assembly 120 is entirely constrained in the limit installation groove 1310, and at the same time, the plurality of limit installation grooves 1310 are arranged at intervals along the moving direction of the box body 110, and each roller assembly 120 protrudes from the liquid cooling plate 130. When the above-mentioned liquid cooling energy storage box 100 is assembled in the energy storage cabinet 10, the weight will be dispersed at each roller assembly 120, and the roller assembly 120 supports the liquid cooling plate 130 to avoid direct friction between the liquid cooling plate 130 and the energy storage cabinet 10, and the two ends of each roller assembly 120 are respectively rotatably connected to the groove wall of the corresponding limit installation groove 1310, so that the assembly can be more conveniently achieved by hand pushing. Compared with traditional battery packs and energy storage devices, both ends of each roller assembly 120 are connected to the groove wall of the mounting groove. When bearing weight, the lateral direction of the roller assembly 120 is respectively limited by the groove wall of the limiting mounting groove 1310, which can offset part of the lateral pressure and effectively prevent the roller assembly 120 from falling off, making it more suitable for bearing weights above 400 kg.

[0035] It can be understood that because the bottom plate is a liquid cooling plate 130, the bottom plate is arranged at the notch of the battery receiving slot 1110. When the battery is arranged in the battery receiving slot 1110, the battery will be in direct contact with the liquid cooling plate 130. While carrying the battery, the liquid cooling plate 130 can absorb the heat generated by the battery during the charging and discharging process. The liquid cooling plate 130 transfers the heat to the outside of the liquid-cooled energy storage box 100 through heat conduction to accelerate the heat dissipation, which can effectively avoid the problem of overheating of the box body 110 and ultimately reduce the possibility of safety accidents.

[0036] Combination Figure 2As shown, in one embodiment, the roller assembly 120 includes a roller 1210 and a wheel axle 1220. The roller 1210 is arranged in a position-limiting installation groove 1310. The groove wall of the position-limiting installation groove 1310 is respectively provided with a first positioning rotation hole 1311 and a second positioning rotation hole 1312 at positions opposite to the two ends of the roller 1210. The roller 1210 is provided with a rotation through hole 1211. The wheel axle 1220 sequentially penetrates the first positioning rotation hole 1311, the rotation through hole 1211 and the second positioning rotation hole 1312. It can be understood that by sequentially penetrating the wheel axle 1220 through the first positioning rotation hole 1311, the rotation through hole 1211 and the second positioning rotation hole 1312, the roller 1210 can be rotated in the installation groove, the structure is compact, and it is less likely to fall off. Specifically, the first end 1221 of the axle 1220 is rotatably set in the first positioning hole 1311, the first positioning hole 1311 constrains and supports the first end 1221 of the axle 1220, the second end 1222 of the axle 1220 is rotatably set in the second positioning hole 1312, the second positioning hole 1312 constrains and supports the second end 1222 of the axle 1220, and the two ends of the axle 1220 are evenly stressed to position and support the entire roller 1210, ultimately enabling the roller assembly 120 to withstand heavier weight.

[0037] Combination Figure 2As shown, in one embodiment, the axle 1220 is detachably connected to the first positioning rotating hole 1311, the rotating through hole 1211 and the second positioning rotating hole 1312. It can be understood that by detachably connecting the axle 1220 to the first positioning rotating hole 1311, the rotating through hole 1211 and the second positioning rotating hole 1312, the axle 1220 can be separated from the first positioning rotating hole 1311, the rotating through hole 1211 and the second positioning rotating hole 1312 in sequence, and then the roller 1210 and the axle 1220 can be quickly disassembled, which is more convenient for users to replace the roller assembly 120 and more practical. Specifically, the axle 1220 is rotatably penetrated in the rotating through hole 1211, and the opposite ends of the axle 1220 are screwed or clamped in the first positioning rotating hole 1311 and the second positioning rotating hole 1312 respectively. Of course, this is not limited here, and those skilled in the art can also use other connection methods as needed. In this embodiment, the wheel axle 1220 is a screw or a bolt, and the wheel axle 1220 is connected to the rotating through hole 1211 through the bearing 1230, and the first positioning rotating hole 1311 is a screw hole and / or the second positioning rotating hole 1312 is a screw hole. It can be understood that after the wheel axle 1220 passes through the first positioning rotating hole 1311, the rotating through hole 1211 and the second positioning rotating hole 1312 in sequence, the roller 1210 can be rotatably arranged on the wheel axle 1220 through the bearing 1230, and the wheel axle 1220 is screwed and fixed to the first positioning rotating hole 1311, or the wheel axle 1220 is screwed and fixed to the second positioning rotating hole 1312, so that the roller assembly 120 can be quickly installed in the limiting installation groove 1310, and can be quickly disassembled by twisting the rotating shaft.

[0038] Combination Figure 3 As shown, in one embodiment, the wheel surface of the roller 1210 extends out of the notch of the position-limiting installation groove 1310, and the maximum distance range L between the wheel surface of the roller 1210 and the liquid cooling plate 130 is 1.3mm-1.7mm. It can be understood that by extending the wheel surface of the roller 1210 out of the notch of the position-limiting installation groove 1310, there is a height difference of 1.3mm-1.7mm between the wheel surface of the roller 1210 and the liquid cooling plate 130. When the above-mentioned liquid-cooled energy storage box 100 is assembled on the energy storage cabinet 10, the roller assembly 120 supports the liquid cooling plate 130, so that a gap of 1.3mm-1.7mm is maintained between the liquid cooling plate 130 and the energy storage cabinet 10, which can effectively avoid the liquid cooling plate 130 and the energy storage cabinet 10 from being too close to each other and causing contact wear, and at the same time, it can also avoid the wheel surface of the roller 1210 protruding too much, which causes waste of space in the energy storage cabinet 10. In addition, the heat can be discharged through the gap after being conducted through the liquid cooling plate 130, accelerating the heat dissipation. Specifically, the maximum distance between the wheel surface of the roller 1210 and the liquid cooling plate 130 can be 1.3mm, 1.5mm or 1.7mm, which is more conducive to heat dissipation and pushing. Of course, this is not limited here, and technicians in this field can make other choices as needed.

[0039] Combination Figure 4 As shown, in one of the embodiments, a wear-resistant ring 140 is sleeved on the wheel surface of the roller 1210. It can be understood that by sleeved the wear-resistant ring 140 on the wheel surface of the roller 1210, the roller 1210 can be well protected to avoid direct wear between the roller 1210 and the energy storage cabinet 10. Specifically, the wear-resistant ring 140 is a rubber ring, a silicone ring and other wear-resistant structures, which are not limited here, and those skilled in the art can also replace them as needed. In this embodiment, the outer surface of the wear-resistant ring 140 is provided with anti-skid patterns 1410. It can be understood that by providing anti-skid patterns 1410 on the outer surface of the wear-resistant ring 140, the friction of the roller assembly 120 can be improved, making the rolling process smoother, and ultimately improving the assembly efficiency of the above-mentioned liquid-cooled energy storage box 100. Furthermore, the anti-skid pattern 1410 includes a plurality of guide plain patterns 1411 and resistance-increasing diagonal patterns 1412, wherein the plurality of guide plain patterns 1411 are arranged in a circle at intervals in the middle of the wear-resistant ring 140; the resistance-increasing diagonal patterns 1412 are arranged at both ends of the wear-resistant ring 140 and are arranged obliquely to the central axis of the roller 1210. It can be understood that because the plurality of guide plain patterns 1411 are arranged in intervals in the middle of the wear-resistant ring 140 and the guide plain patterns 1411 are arranged in a circle along the outer peripheral wall of the wear-resistant ring 140, the liquid-cooled energy storage box 100 can be guided to move during the rolling of the roller 1210, thereby preventing the liquid-cooled energy storage box 100 from deviating in direction during the advancement process. At the same time, the resistance-increasing twill 1412 is arranged at both ends of the wear-resistant ring 140. By making the resistance-increasing twill 1412 inclined to the central axis of the roller 1210, during the assembly process, the friction between the resistance-increasing twill 1412 and the energy storage cabinet 10 is greater, ultimately making the movement process of the liquid-cooled energy storage box 100 smoother and smoother.

[0040] Combination Figure 1As shown, in one embodiment, a plurality of roller assemblies 120 are divided into two groups, namely, a first rolling group 12a and a second rolling group 12b; the first rolling group 12a and the second rolling group 12b are respectively arranged at opposite sides of the liquid cooling plate 130. It can be understood that the first side 1313 of the liquid cooling plate 130 is supported by the first rolling group 12a, and the second side 1314 of the liquid cooling plate 130 is supported by the second rolling group 12b. The first side 1313 of the liquid cooling plate 130 and the second side 1314 of the liquid cooling plate 130 are arranged opposite to each other, so that the load-bearing capacity at both sides of the liquid cooling plate 130 is consistent, so that the entire liquid cooling energy storage box 100 can be supported by the first rolling group 12a and the second rolling group 12b, and finally the liquid cooling energy storage box 100 can be smoothly transferred by the first rolling group 12a and the second rolling group 12b. Specifically, a first reinforcing beam 1315 is provided at the first side 1313 of the liquid cooling plate 130, and a second reinforcing beam 1316 is provided at the second side 1314 of the liquid cooling plate 130. A plurality of limiting mounting grooves 1310 are respectively opened on the first reinforcing beam 1315 and the second reinforcing beam 1316. The first rolling group 12a is provided on the liquid cooling plate 130 through the first reinforcing beam 1315, and the second rolling group 12b is provided on the liquid cooling plate 130 through the second reinforcing beam 1316, which can enhance the pressure bearing capacity of the first side 1313 of the liquid cooling plate 130 and the second side 1314 of the liquid cooling plate 130.

[0041] Combination Figure 5 As shown, the present disclosure further provides an energy storage cabinet 10, including the liquid-cooled energy storage box 100 of any of the above-mentioned embodiments. It can be understood that by applying the liquid-cooled energy storage box 100 of the present disclosure to the energy storage cabinet 10, the liquid-cooled energy storage box 100 can transfer more and heavier batteries to be assembled into the compartment 200 of the energy storage cabinet 10, thereby increasing the total energy storage amount of the energy storage cabinet 10, and the energy storage effect is better and more durable.

[0042] Compared with the prior art, the present invention has at least the following advantages:

[0043] 1) Because the liquid cooling plate 130 is provided with a plurality of limit installation grooves 1310 on a surface away from the box body 110, by making each roller assembly 120 correspondingly arranged in each limit installation groove 1310 one by one, the roller assembly 120 is entirely constrained in the limit installation groove 1310, and at the same time, the plurality of limit installation grooves 1310 are arranged at intervals along the moving direction of the box body 110, and each roller assembly 120 protrudes from the liquid cooling plate 130. When the above-mentioned liquid cooling energy storage box 100 is assembled in the energy storage cabinet 10, the weight will be dispersed at each roller assembly 120, and the roller assembly 120 supports the liquid cooling plate 130 to avoid direct friction between the liquid cooling plate 130 and the energy storage cabinet 10, and the two ends of each roller assembly 120 are respectively rotatably connected to the groove wall of the corresponding limit installation groove 1310, so that the assembly can be more conveniently achieved by hand pushing. Compared with traditional battery packs and energy storage devices, both ends of each roller assembly 120 are connected to the groove wall of the mounting groove. When bearing weight, the lateral direction of the roller assembly 120 is respectively limited by the groove wall of the limiting mounting groove 1310, which can offset part of the lateral pressure and effectively prevent the roller assembly 120 from falling off, making it more suitable for bearing weights above 400 kg.

[0044] 2) Because the bottom plate is a liquid cooling plate 130, the bottom plate is arranged at the notch of the battery receiving slot 1110. When the battery is arranged in the battery receiving slot 1110, the battery will be in direct contact with the liquid cooling plate 130. While carrying the battery, the liquid cooling plate 130 can absorb the heat generated by the battery during the charging and discharging process. The liquid cooling plate 130 transfers the heat to the outside of the liquid-cooled energy storage box 100 through heat conduction to accelerate the heat dissipation, which can effectively avoid the problem of overheating of the box body 110 and ultimately reduce the possibility of safety accidents.

[0045] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be based on the attached claims.

Claims

1. A liquid-cooled energy storage box, comprising a box body, a bottom plate and a plurality of roller assemblies, wherein the box body is provided with a battery receiving slot; the bottom plate is provided with a notch of the battery receiving slot, and the bottom plate is used to carry the battery; and a plurality of the roller assemblies are arranged on the bottom plate; It is characterized in that The bottom plate is a liquid cooling plate, and a plurality of limit mounting grooves are provided on a side of the liquid cooling plate away from the box body. The plurality of limit mounting grooves are arranged at intervals along the moving direction of the box body, and each of the roller assemblies is arranged in each of the limit mounting grooves in a corresponding manner; each of the roller assemblies protrudes from the liquid cooling plate, and both ends of each of the roller assemblies are rotatably connected to the groove wall of the corresponding limit mounting groove.

2. The cold energy storage box according to claim 1, characterized in that: The roller assembly includes a roller and an axle, the roller is arranged in the limiting installation groove, the groove wall of the limiting installation groove is respectively provided with a first positioning rotation hole and a second positioning rotation hole at positions opposite to the two ends of the roller, the roller is provided with a rotating through hole, and the axle passes through the first positioning rotation hole, the rotating through hole and the second positioning rotation hole in sequence.

3. The cold energy storage box according to claim 2, characterized in that: The wheel axle is detachably connected to the first positioning rotating hole, the rotating through hole and the second positioning rotating hole respectively.

4. The cold energy storage box according to claim 3, characterized in that: The wheel axle is a screw or a bolt, the wheel axle is connected to the rotating through hole via a bearing, the first positioning rotating hole is a screw hole and / or the second positioning rotating hole is a screw hole.

5. The cold energy storage box according to claim 2, characterized in that: The wheel surface of the roller extends out of the notch of the position-limiting installation slot, and the maximum distance between the wheel surface of the roller and the liquid cooling plate is in the range of 1.3 mm to 1.7 mm.

6. The cold energy storage box according to claim 2, characterized in that: A wear-resistant ring is provided on the wheel surface of the roller.

7. The cold energy storage box according to claim 6, characterized in that: The outer surface of the wear-resistant ring is provided with anti-skid patterns.

8. The cold energy storage box according to claim 7, characterized in that: The anti-slip pattern includes a plurality of guide plain patterns and resistance-increasing diagonal patterns. The plurality of guide plain patterns are arranged in a circle at intervals in the middle of the wear-resistant ring; the resistance-increasing diagonal patterns are arranged at both ends of the wear-resistant ring and are inclined to the central axis of the roller.

9. The cold energy storage box according to claim 1, characterized in that: The plurality of roller assemblies are divided into two groups, namely a first rolling group and a second rolling group; the first rolling group and the second rolling group are respectively arranged at two opposite sides of the liquid cooling plate.

10. An energy storage cabinet, characterized in that: A liquid-cooled energy storage box comprising any one of claims 1-9.

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