Energy storage assembly, cold charging and cold storage system, cold storage cooling system and cold chain transport box

Abstract

The application provides an energy storage assembly, a charging and cold storage system, a cold storage system and a cold chain transport box with the same. The energy storage assembly comprises a plurality of rows of energy storage devices and energy storage channels arranged in sequence from bottom to top. The energy storage channels are connected with the energy storage devices row by row from bottom to top. The inlet of the energy storage channel is located at the lowermost row of energy storage devices, and the outlet of the energy storage channel is located at the uppermost row of energy storage devices. The cold carrier enters the energy storage assembly from the inlet of the energy storage channel, exchanges heat with the energy storage devices from bottom to top, and then flows out from the outlet of the energy storage channel. Therefore, the energy storage devices in the lower row obtain heat or cold before the energy storage devices above them, and the energy storage devices in the lower row can provide heat or cold to the energy storage devices above them through heat radiation or contact heat transfer, so that the energy storage material in the lower part changes phase before the energy storage material in the upper part, and the phenomenon of deformation or rupture of the energy storage device is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold storage, and in particular to an energy storage assembly capable of preventing deformation or cracking, and a cold charging and storing system, a cold storage and supplying system and a cold chain transport box having the same. BACKGROUND

[0002] With the improvement of living standards, there are more and more application scenarios that need to provide cold or heat. If a refrigerating unit is set in all application scenarios, the cost is high and the energy consumption is also high.

[0003] For example, cold chain logistics generally refers to a system engineering that ensures food quality and reduces food loss by keeping cold storage and frozen food in a specified low-temperature environment throughout the production, storage, transportation, sales and consumption process. The traditional cold chain transport vehicle supplies power to the refrigerating unit through gasoline or battery pack, and the refrigerating unit works to supply cold to the refrigeration box. The refrigerating unit needs to work throughout the transportation section, resulting in high energy consumption and low utilization rate.

[0004] In order to save energy and protect the environment, an energy storage assembly is loaded on the cold chain transport vehicle to store cold at the starting point. During the entire transportation process, the cold storage unit supplies cold to the refrigeration box, reducing energy consumption. However, it is found that when the energy storage assembly includes a plurality of energy storage devices arranged in multiple layers, the lower energy storage devices are deformed or cracked during the cold storage process.

[0005] Therefore, it is necessary to provide an improved energy storage assembly, a cold charging and storing system, a cold storage and supplying system and a cold chain transport box to solve the above technical problems. SUMMARY

[0006] The present application aims to provide an energy storage device capable of preventing cracking and a cold charging and storing system, a cold storage and supplying system and a cold chain transport box having the same.

[0007] To achieve one of the above-mentioned purposes, the present application adopts the following technical solutions:

[0008] An energy storage assembly comprises:

[0009] a plurality of rows of energy storage devices arranged in sequence from bottom to top

[0010] an energy storage channel, which is connected to the energy storage devices row by row from bottom to top, and the inlet of the energy storage channel is located at the lowermost row of energy storage devices, and the outlet of the energy storage channel is located at the uppermost row of energy storage devices.

[0011] Further, each row comprises at least two energy storage devices, each of which comprises a flow passage; the energy storage assembly further comprises a connecting pipe with a flow passage, the connecting pipe comprising an in-row connecting pipe serially connecting the flow passages of the energy storage devices in each row, and an inter-row connecting pipe connecting the flow passages of the two energy storage devices corresponding in the adjacent rows in the up-down direction; the flow passages and the flow passage together form the energy storage passage.

[0012] Alternatively, each row comprises only one energy storage device, which comprises a flow passage; the energy storage assembly further comprises a connecting pipe with a flow passage, the connecting pipe connecting the flow passages of the adjacent energy storage devices; the flow passages and the flow passage together form the energy storage passage.

[0013] Further, each row comprises at least two energy storage devices, each of which comprises a flow passage; the energy storage assembly further comprises a connecting pipe with a flow passage, the connecting pipe comprising an in-row connecting pipe serially connecting the flow passages of the energy storage devices in each row, and an inter-row connecting pipe connecting the flow passages of the two energy storage devices corresponding in the adjacent rows in the up-down direction; the flow passages and the flow passage together form the energy storage passage.

[0014] Alternatively, each row comprises only one energy storage device, which comprises a flow passage; the energy storage assembly further comprises a connecting pipe with a flow passage, the connecting pipe connecting the flow passages of the adjacent energy storage devices; the flow passages and the flow passage together form the energy storage passage.

[0015] Further, the energy storage device comprises:

[0016] a shell;

[0017] an inner pipe with the flow passage, the inner pipe being arranged in the shell, and the inner pipe and the shell together forming an energy storage cavity for sealingly storing energy storage material;

[0018] a plurality of heat-conducting fins connected to the outer wall of the inner pipe, the heat-conducting fins being arranged in the energy storage cavity.

[0019] Further, the shell comprises an outer pipe with a first end and a second end located on opposite sides of the axis thereof; the inner pipe is arranged in the outer pipe, the inner pipe is parallel to the outer pipe, and the inner pipe is offset to the first end relative to the outer pipe.

[0020] Further, the offset distance between the central axis of the inner tube and the central axis of the outer tube is not greater than a threshold value L1, the heat-conducting sheets extend radially outwardly from the inner tube, and the included angles between adjacent heat-conducting sheets are equal in the circumferential direction of the inner tube; or the length of the heat-conducting sheets decreases in the circumferential direction of the inner tube and / or the arrangement density of the heat-conducting sheets decreases in the circumferential direction of the inner tube in part of the energy storage cavity.

[0021] Alternatively, the distance between the central axis of the inner tube and the central axis of the outer tube is not less than a threshold value L2, and the length and / or arrangement density of the heat-conducting sheets in contact with the inner tube on the side of the first end are less than those of the heat-conducting sheets in contact with the inner tube on the side of the second end.

[0022] Further, the length of the heat-conducting sheets decreases in the circumferential direction of the inner tube and / or the arrangement density of the heat-conducting sheets decreases in the circumferential direction of the inner tube and / or the thickness of the heat-conducting sheets decreases in the circumferential direction of the inner tube in part of the energy storage cavity.

[0023] Further, the energy storage assembly further comprises a fixing unit for fixing the energy storage device, the fixing unit comprises a fixing shell and a clamping strip matched with the fixing shell to position and clamp the energy storage device, and the clamping strip is provided with a positioning groove for preventing the energy storage device from being displaced under external force.

[0024] A cold-charged energy storage system, comprising a cold source with a built-in cold carrier, and any of the energy storage assemblies described above, wherein the inlet and outlet of the energy storage channel are connected to the two ends of the cold source, respectively.

[0025] A cold-charged energy storage system, comprising a compressor, a condenser in communication with the compressor, a throttling element in communication with the condenser, and any of the energy storage assemblies described above, wherein the inlet of the energy storage channel is connected to the throttling element, and the outlet of the energy storage channel is connected to the compressor.

[0026] A cold chain transport box, comprising any of the energy storage assemblies described above.

[0027] The energy storage assembly of the present application has the following advantages: the cold carrier enters the energy storage assembly from the inlet of the energy storage channel, exchanges heat with the energy storage devices from bottom to top, and then flows out from the outlet of the energy storage channel, so that the energy storage devices in the lower row obtain heat or cold before the energy storage devices above them, and the energy storage devices in the lower row can provide heat or cold to the energy storage devices above them through heat radiation or contact heat transfer, ensuring that the energy storage materials in the lower part undergo phase change before the energy storage materials in the upper part, and avoiding deformation or rupture of the energy storage devices. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1is a perspective view of the energy storage assembly of a preferred embodiment of the present application;

[0029] Figure 2 is Figure 1 an exploded view;

[0030] Figure 3 is Figure 1 an assembled view of the energy storage device and the connecting pipe in

[0031] Figure 4 is a schematic view of the arrangement of a plurality of energy storage devices, (a) is a schematic view of the direction of heat transfer when the coolant flows from the upper row of energy storage devices to the lower row of energy storage devices, and (b) is a schematic view of the direction of heat transfer when the coolant flows from the lower row of energy storage devices to the upper row of energy storage devices;

[0032] Figure 5 is a perspective view of the energy storage device of a preferred embodiment of the present application;

[0033] Figure 6 is Figure 5 a schematic view along the direction perpendicular to the axial direction of the inner pipe;

[0034] Figure 7 is Figure 6 a schematic view of the comparison of the order of points in the energy storage device;

[0035] Figure 8 is a perspective view of the energy storage device of another preferred embodiment of the present application; Figure 4 an exploded view;

[0036] Figure 9 is a sectional view along the direction of B-B;

[0037] Figure 10 is a schematic view of another embodiment of the present application; Figure 9 an exploded view;

[0038] Figure 11 is a schematic view of another embodiment of the present application;

[0039] Figure 12 is Figure 11 a schematic view of another embodiment of the present application; Figure 9 an exploded view;

[0040] Figure 13 is a schematic view of another preferred embodiment of the present application; Figure 6 an exploded view;

[0041] Figure 14 is a schematic view of another preferred embodiment of the present application; Figure 6 an exploded view;

[0042] Figure 15is another preferred embodiment of the energy storage device Figure 6 perspective view of the angle of view;

[0043] Figure 16 is another embodiment of the energy storage device;

[0044] Figure 17 is Figure 16 is an exploded view of

[0045] Figure 18 is Figure 16 is a schematic view of the end of the outer tube, inner tube and heat conducting sheet.

[0046] In the figure, 100-energy storage device, 200-energy storage assembly, 1-outer shell, 11-energy storage cavity, 111-sub energy storage cavity, 12-outer tube, 13-end cover, 131-injection port, 132-sealing element, 133-through hole, 134-sleeve, 14-flow channel, 14'-auxiliary flow channel, 2-inner tube, 3-heat conducting sheet, 31-heat transfer sheet, 32-radiating sheet, 4-connection tube, 4a-inlet of energy storage channel, 4b-outlet of energy storage channel, 41-in-row connection tube, 42-inter-row connection tube, 5-fixing unit, 51-clamping strip, 52-fixing housing. DETAILED DESCRIPTION

[0047] The present application will be described in detail below with reference to the specific embodiments shown in the drawings. However, these embodiments do not limit the present application, and the structural, method, or functional changes made by those of ordinary skill in the art based on these embodiments are included in the protection scope of the present application.

[0048] In each of the figures of the present application, some dimensions of structures or parts are exaggerated relative to other structures or parts for ease of illustration, and thus, are used only to illustrate the basic structure of the subject matter of the present application.

[0049] For convenience of description, the lower and upper are defined according to the orientation of the energy storage device in the actual use process.

[0050] The inventor found in the research that when a plurality of energy storage devices are arranged in an up-down manner, if the cold carrier flows from the upper energy storage device to the lower energy storage device, the upper energy storage device first obtains cold or heat, and then provides heat or cold to the lower energy storage device through heat radiation or contact, so that the energy storage liquid in the upper half of the lower energy storage device is limited to the phase change of the energy storage liquid in the lower half. If the phase change such as from liquid to solid occurs, the lower half of the energy storage device will be deformed or broken due to bearing a large pressure.

[0051] As Figures 1-4As shown, the energy storage assembly 200 of a preferred embodiment of the present application comprises a plurality of rows of energy storage devices 100 arranged in sequence from bottom to top, and an energy storage channel for the flow of energy carrier, wherein the inlet 4a of the energy storage channel is located at the bottom row of energy storage devices, and the outlet 4b of the energy storage channel is located at the top row of energy storage devices.

[0052] Specifically, each row comprises at least two energy storage devices 100, and the energy storage devices 100 comprise flow channels; the energy storage assembly 200 further comprises a connecting pipe 4 provided with a flow passage, wherein the connecting pipe 4 comprises an intra-row connecting pipe 41 connecting the flow channels of the energy storage devices 100 in each row in series, and an inter-row connecting pipe 42 connecting the flow channels of the two energy storage devices 100 corresponding in the adjacent rows in the up-down direction; the flow channels and the flow passage jointly form the energy storage channel. The inlet 4a of the energy storage channel is in communication with the flow channel of any one of the energy storage devices 100 in the bottom row; and the outlet 4b of the energy storage channel is in communication with the flow channel of any one of the energy storage devices 100 in the top row.

[0053] In another energy storage assembly 200, the difference from the embodiment shown in the figure is that each row comprises only one energy storage device 100, and the connecting pipe 4 is in communication with the flow channels of the two adjacent energy storage devices 100, and the flow channels and the flow passage jointly form the energy storage channel. Figure 1 In another energy storage assembly 200, the difference from the embodiment shown in the figure is that each row comprises only one energy storage device 100, and the connecting pipe 4 is in communication with the flow channels of the two adjacent energy storage devices 100, and the flow channels and the flow passage jointly form the energy storage channel.

[0054] Figure 1 In another energy storage assembly 200, the difference from the embodiment shown in the figure is that the connecting pipe 4 and the energy storage device 100 are connected in the following manner: the connecting pipe 4 comprises an intra-row connecting pipe 41 connected in series in the flow channels of the energy storage devices 100 in each row, and an inter-row connecting pipe 42 connecting the intra-row connecting pipes 41 in the flow channels of the two energy storage devices 100 corresponding in the adjacent rows in the up-down direction; the flow passage and the energy storage channel jointly form the energy storage channel, the inlet of the connecting pipe 4, i.e. the inlet 4a of the energy storage channel, is located at any one of the energy storage devices in the bottom row; and the outlet of the connecting pipe 4, i.e. the outlet 4b of the energy storage channel, is located at any one of the energy storage devices 100 in the top row.

[0055] Preferably, the outer wall of the connecting pipe 4 is in close contact with the inner wall of the flow channel. Here, "close contact" means that the connecting pipe 4 is in close contact with the inner pipe 2 without any gap, and the two are free of any gap within the error range of assembly; therefore, the heat or heat reference transfer direction is: the liquid in the connecting pipe 4 → the connecting pipe 4 → the inner wall of the flow channel 2 → the cold storage liquid in the energy storage device 100; the cold or heat is transferred between liquid-solid, solid-solid, and solid-liquid, with less heat loss, ensuring fast and effective heat transfer and reducing heat transfer loss. For example, the connecting pipe 4 and the flow channel are in interference fit, which can be achieved by the pipe expansion process. ​

[0056] Preferably, two adjacent rows of the energy storage devices 100 are arranged in staggered manner in horizontal direction, or in other words, the energy storage devices 100 are arranged in honeycomb manner, the projections of the two adjacent rows of the energy storage devices 100 on the same horizontal plane are staggered. Or, two adjacent rows of the energy storage devices 100 are arranged in aligned manner in horizontal direction, or in other words, the energy storage devices 100 are arranged in thousand-island manner, the projections of the two adjacent rows of the energy storage devices 100 on the same horizontal plane are coincident. In both arrangement manners, there are gaps between the energy storage devices 100, which facilitate the flow of air and other fluids, thereby realizing heat exchange with the energy storage assembly 200.

[0057] In another energy storage assembly 200, the difference from the above-mentioned embodiment is that each row only includes one energy storage device 100, at this time, the connecting pipe 4 is sequentially arranged in the flow channel of the energy storage devices 100 arranged from bottom to top, the inlet of the connecting pipe 4 is located at the lowermost energy storage device 100, and the outlet of the connecting pipe 4 is located at the uppermost energy storage device 100.

[0058] In the energy storage assembly 200 of the present application, the refrigerant enters the energy storage assembly 200 from the inlet 4a of the energy storage channel, exchanges heat with the energy storage devices 100 from bottom to top, and then flows out of the energy storage assembly 200 through the outlet 4b of the energy storage channel. Therefore, the energy storage devices 100 in the lower row obtain heat or cold before the energy storage devices 100 above them, and the energy storage devices 100 in the lower row can provide heat or cold to the energy storage devices 100 above them through heat radiation or contact heat transfer, ensuring that the lower energy storage materials undergo phase change before the upper energy storage materials, and avoiding the phenomenon of deformation or rupture of the energy storage devices 100.

[0059] Hereinafter, the energy storage device 100 of the present application will be mainly described.

[0060] Please refer to Figures 5-18 The energy storage device 100 of the present application includes a shell 1, an inner pipe 2 arranged in the shell 1 and having a flow channel, a closed energy storage cavity 11 formed by the shell 1 and the inner pipe 2 for storing energy storage materials, and a heat-conducting sheet 3 located in the energy storage cavity 11. The heat-conducting sheet 3 is in contact with at least one of the shell 1 or the inner pipe 2, so as to improve the heat exchange speed.

[0061] The shape of the shell 1 is not limited and can be changed as needed or according to the installation space. The shell 1 is a whole sealed shell, or the shell 1 has an opening and a sealing structure sealing the opening; as long as it can seal a certain amount of energy storage materials.

[0062] For example Figure 5In the shown embodiment, the shell 1 comprises an outer tube 12, and end caps 13 closing both ends of the outer tube 12. The end caps 13 can be any structure closing both ends of the outer tube 12, and the end caps 13 can be provided separately from the outer tube 12 or integrally with the outer tube 12.

[0063] The cross-sectional shape of the outer tube 12 can be circular, polygonal, or any other shape. The polygonal shape can include, but is not limited to, triangular, square, hexagonal, trapezoidal, etc.

[0064] The end caps 13 are provided with through holes 133 for the inner tube 2 to pass through. After the inner tube 2 is placed in the through holes 133, the connection between the end caps 13 and the inner tube 2 is sealed by welding or other methods. This process is convenient for manufacturing. Meanwhile, the end caps 13 and / or the outer tube 12 are provided with injection ports 131 for injecting energy storage material into the energy storage cavity 11. After the energy storage material is injected, the injection ports 131 are sealed by sealing members 132.

[0065] The energy storage device 100 further comprises energy storage material in the energy storage cavity 11. The energy storage material is preferably a phase change material, which can store or release a large amount of energy during phase change. During phase change of the energy storage material, the change in volume of the energy storage material will exert a certain pressure on the shell 1, and the compression of the gas in the energy storage cavity 11 will also exert a certain pressure on the shell 1. Considering the pressure that the energy storage device 100 can withstand, the amount of energy storage material added is: when the energy storage material is in a liquid state, its volume is not greater than 80% of the volume of the energy storage cavity 11, so that when the energy storage material undergoes phase change, it will not increase the volume of the energy storage device 100 due to the increase in volume.

[0066] The inner tube 2 is arranged in the shell 1, and the inner tube 2 and the shell 1 form the energy storage cavity 11.

[0067] The cross-sectional shape of the inner tube 2 can be circular, polygonal, or any other shape. The cross-sectional shape of the inner tube 2 can be the same as that of the outer tube 12, and the relative positions of the two are obvious. Or the cross-sectional shape of the inner tube 2 can be different from that of the outer tube 12, which increases the selection space of the two, and the best shape combination can be made according to the actual situation.

[0068] In a preferred embodiment, both ends of the inner tube 2 are exposed outwardly from the end caps 13, which facilitates welding of the inner tube 2 and the shell 1. Specifically, the through holes 133 of the end caps 13 are sleeved on the inner tube 2, and then the end caps 13 and the inner tube 2 are welded on the outer side of the end caps 13.

[0069] In other embodiments, as shown in FIG. 2, the end caps 13 are provided with through holes 133 for the inner tube 2 to pass through. After the inner tube 2 is placed in the through holes 133, the connection between the end caps 13 and the inner tube 2 is sealed by welding or other methods. This process is convenient for manufacturing. Meanwhile, the end caps 13 and / or the outer tube 12 are provided with injection ports 131 for injecting energy storage material into the energy storage cavity 11. After the energy storage material is injected, the injection ports 131 are sealed by sealing members 132. Figure 10As shown, a sleeve 134 extending inwardly can be provided on the end cover 13, and the inner tube 2 is connected with the sleeve 134, and the inner tube 2 is located inside the outer shell 1. Of course, the sleeve 134 can also extend outwardly from the end cover 13.

[0070] The heat-conducting sheet 3 can expand the heat transfer area, thereby improving the heat exchange speed. Therefore, by adjusting the structure, arrangement density, etc. of the heat-conducting sheet 3, the heat exchange speed in the energy storage cavity 11 can be changed. The relative position of the inner tube 2 and the outer tube 12, the specific structure of the heat-conducting sheet 3, and the arrangement mode thereof will be described in detail below.

[0071] The heat-conducting sheet 3 includes a heat transfer sheet 31 in contact with the inner tube 2 and the outer shell 1. The heat transfer sheet 31 not only supports and fixes the inner tube 2, but also enables the inner tube 2 and the outer shell 1 to perform rapid heat exchange, so that the inner tube 2 and the outer shell 1 respectively perform heat exchange with the energy storage material in the energy storage cavity 11 from the inner and outer sides, thereby improving the heat exchange efficiency.

[0072] For example, when the inner tube 2 is connected with the cooling unit, the inner tube 2 after being cooled performs heat exchange with the outer shell 1 through the heat transfer sheet 31, so that the temperature of the outer shell 1 is reduced, and then the outer shell 1 and the inner shell simultaneously perform heat exchange with the energy storage material, thereby improving the cooling speed of the energy storage material.

[0073] In a specific embodiment, the heat transfer sheet 31 extends outwardly from the inner tube 2 and is connected with the outer shell 1. "Extending outwardly from the inside" means that the heat transfer sheet 31 has a tendency to extend outwardly from the inside, including but not limited to extending outwardly along the radial direction of the inner tube 2.

[0074] Further, the heat transfer sheet 31 includes an inner connecting portion connected with the inner tube 2 and / or an outer connecting portion connected with the outer shell 1, thereby improving the connection strength and heat transfer performance of the heat transfer sheet 31 with the inner tube 2 and the outer tube 12. Along the circumferential direction of the inner tube 2, the thickness of the inner connecting portion decreases from the middle to both sides, thereby enhancing the connection strength and heat transfer effect; and the inner connecting portion has an inner side surface, and the outer wall of the connection position of the inner tube 2 and the heat transfer sheet 31 is consistent with the shape of the inner side surface, and the outer wall is tightly connected with the inner side surface. Along the circumferential direction of the inner tube 2, the thickness of the outer connecting portion decreases from the middle to both sides, thereby enhancing the connection strength and heat transfer effect; and the outer connecting portion has an outer side surface, and the inner wall of the connection position of the outer shell 1 and the heat transfer sheet 31 is consistent with the shape of the outer side surface, and the inner wall is tightly connected with the outer side surface.

[0075] The heat transfer sheet 31 can be in a sheet shape, an arc shape, a spiral shape, etc. Preferably, the sheet shape is convenient to manufacture, especially when the inner tube 2, the heat transfer sheet 31, and the outer shell 1 are integrally formed, which greatly reduces the process difficulty. After being cut along the axial direction perpendicular to the inner tube 2, the cross section of the heat transfer sheet 31 is in a rectangular shape, a triangular shape, a trapezoidal shape, an arc shape, etc.

[0076] Taking the sheet shape as an example, the thickness of the heat transfer sheet 31 is not less than 1.5 mm, preferably between 1.5 mm and 2 mm. The heat transfer sheet 31 has sufficient strength to support and fix the inner tube 2, and the thermal resistance of the heat transfer sheet 31 with this thickness is small, which can effectively reduce the heat attenuation of the heat transfer sheet 31 and ensure the effective heat transfer between the outer tube 12 and the inner tube 2.

[0077] As can be seen from the above, the more the number of the heat transfer sheet 31, the faster the heat exchange speed of the entire energy storage device 100. Among them, the number of the heat transfer sheet 31 is calculated in the extension direction of the heat transfer sheet 31 relative to the inner tube 2, that is, the heat transfer sheet 31 extending in different directions from the inner tube 2 is two different heat transfer sheets 31; and is not directly calculated at the connection point of the heat transfer sheet 31 and the heat transfer sheet 31.

[0078] The inventor found that when there are at least two heat transfer sheets 31, the heat transfer sheet 31 divides the energy storage cavity 11 into at least two sub-energy storage cavities 111. In the use process, when the energy storage material in the sub-energy storage cavity 111 changes in volume during phase change, it will cause the deformation or rupture of the outer shell 1 surrounding the sub-energy storage cavity, affecting the use and appearance; or cause the deformation or breakage of the heat transfer sheet 31 surrounding the sub-energy storage cavity, affecting the heat exchange speed.

[0079] To solve this technical problem, the energy storage device 100 further comprises a flow channel 14 communicating at least two sub-energy storage cavities 111. By connecting each sub-energy storage cavity 111 through the flow channel 14, when the energy storage material expands in volume during phase change, such as from liquid to solid, the liquid energy storage material can flow in the adjacent sub-energy storage cavity 111 through the flow channel 14, releasing the pressure of the single sub-energy storage cavity, preventing the deformation or rupture of the energy storage device 100.

[0080] Specifically, the flow channel 14 is located between the heat transfer sheet 31 and the inner tube 2, or the flow channel 14 is located between the heat transfer sheet 31 and the outer shell 2; or the flow channel 14 penetrates the heat transfer sheet 31, that is, the flow channel 14 is arranged inside the heat transfer sheet 31.

[0081] In a preferred embodiment, the heat transfer sheet 31 extends along the axial direction of the inner tube 2, and the flow channel 14 is located between the inner tube 2 and at least one end of the heat transfer sheet 31 along the axial direction of the inner tube 2; and / or the flow channel 14 is located between the outer shell 1 and at least one end of the heat transfer sheet 31 along the axial direction of the inner tube 2. Such a design greatly reduces the processing difficulty, especially in the energy storage device 100 in which the inner tube 2, the heat transfer sheet 31, and the outer tube 12 are integrally formed. After forming, part of the heat transfer sheet 31 at the at least one end of the heat transfer sheet 31 along the axial direction of the inner tube 2 can be removed to form the flow channel 14, which is simple and feasible.

[0082] Of course, the flow channel 14 can also be arranged at the edge of the heat transfer sheet 31 along the radial direction, including two cases: the flow channel 14 is located at the edge of the heat transfer sheet 31 adjacent to the inner tube 2, and in this case, the flow channel 14 is located between the heat transfer sheet 31 and the inner tube 2; or the flow channel 14 is located at the edge of the heat transfer sheet 31 adjacent to the outer tube 12, and in this case, the flow channel 14 is located between the heat transfer sheet 31 and the outer tube 12.

[0083] Alternatively, the flow channel 14 also penetrates the heat transfer sheet 31 at the middle position of the heat transfer sheet 31.

[0084] Further, the heat transfer sheet 3 further comprises at least one heat dissipation sheet 32 located in the sub-energy storage cavity 111, and the heat dissipation sheet 32 can further improve the heat exchange speed. The heat dissipation sheet 32 is connected to the inner tube 2, and there is a gap between the heat dissipation sheet 32 and the outer shell 1; or the heat dissipation sheet 32 is connected to the outer shell 1, and there is a gap between the heat dissipation sheet 32 and the inner tube 31.

[0085] The difference between the heat dissipation sheet 32 and the heat transfer sheet 31 in structure is only that the thickness of the heat dissipation sheet 32 is smaller than the thickness of the heat transfer sheet 31. On the premise of ensuring the improvement of the heat exchange speed, the heat dissipation sheet 32 does not occupy too much of the energy storage cavity 11, and at the same time, the weight and cost can be reduced.

[0086] There is a gap between the heat dissipation sheet 32 and the outer shell 1 or the inner tube 2, which ensures that the flow path of the energy storage material in the energy storage cavity 11 is unobstructed, and reduces the flow resistance of the energy storage material.

[0087] Preferably, the heat dissipation sheet 32 is provided with an auxiliary flow channel 14' at a position corresponding to the flow channel 14, which ensures that the flow of the energy storage material is unobstructed. The "corresponding position" refers to the position on the heat dissipation sheet 32 mapped by the flow channel 14 along the circumferential direction of the inner tube 2. Fluid medium can quickly pass through adjacent flow channels 14 and auxiliary flow channels 14', thereby improving the flow speed.

[0088] Specifically, at least one end of the heat transfer sheet 31 and the heat dissipation sheet 32 is located inside the outer shell 1 along the axial direction of the inner tube 2, i.e. the outer shell 1 exceeds the end of the heat transfer sheet 31 and the heat dissipation sheet 32. Preferably, the same end of the heat transfer sheet 31 and the heat dissipation sheet 32 along the axial direction of the inner tube 2 is flush with the outer shell 1 and has a gap therebetween, which forms the flow channel 14, and the phase change of the energy storage material in different sub- energy storage cavities 111 occurs at the gap.

[0089] In one embodiment, the outer shell 1 comprises an outer tube 12 and end covers 13 connected to both ends of the outer tube 12, the inner tube 2 extends along the axial direction of the outer tube 12, and both ends of the inner tube 2 are exposed outward from the end covers 13, and both ends of the heat transfer sheet 31 along the radial direction of the inner tube 2 are in contact with the inner tube 2 and the outer tube 12, respectively; the heat transfer sheet 31 and the heat dissipation sheet 32 have a gap between the end along the axial direction of the inner tube 2 and the end cover 13, which forms the flow channel 14.

[0090] The inventor has also found in research that the phase change speed of the energy storage material is related to the speed of obtaining cold or heat, and the position of the inner tube 2 in the outer tube 12, the structure and arrangement of the heat transfer sheet 31 and / or the structure and arrangement of the heat dissipation sheet 32 all affect the speed of the energy storage material obtaining cold or heat, and the faster the energy storage material obtains cold or heat, the faster the phase change occurs.

[0091] The heat transfer sheet 31 and the heat dissipation sheet 32 divide the energy storage cavity 11 into several small non-closed cavities; if the energy storage material at the outlet of the cavity changes phase to increase in volume before the energy storage material inside the cavity, for example, the energy storage material at the outlet of the cavity changes from liquid to solid before the energy storage material inside the cavity changes from liquid to solid, it will cause the outer shell 1, the inner tube 2 or the heat transfer sheet 3 that forms the cavity to deform or burst. Conversely, if the energy storage material inside the cavity changes phase to increase in volume before the energy storage material at the outlet of the cavity, i.e. the phase change speed of the energy storage material in the energy storage cavity decreases from the inside to the outlet of the cavity, when the phase change to increase in volume occurs inside, the liquid or gaseous energy storage material flows outward, which can prevent the energy storage device 100 from deforming or bursting; therefore, how to control the change direction of the phase change speed in at least part of the region in the energy storage cavity 11 is crucial.

[0092] In the present application, the structure and arrangement of the heat-conducting sheet 3 in part of the energy storage cavity 11 meet at least one of the following conditions: the length of the heat-conducting sheet 3 decreases along the circumference of the inner tube 2, the arrangement density of the heat-conducting sheet 3 decreases along the circumference of the inner tube 2, and the thickness of the heat-conducting sheet 3 decreases along the circumference of the inner tube 2. Along the above-mentioned decreasing direction, the heat-conducting sheet 3 provides less heat or cold to the energy storage liquid in the energy storage cavity, and the phase change speed of the energy storage liquid decreases, so that the deformation or rupture of the energy storage device 100 can be avoided.

[0093] The above-mentioned "part of the energy storage cavity" is a part of the energy storage cavity 11. In the embodiment in which the heat-conducting sheet 3 includes the heat-conducting sheet 31 and the heat-dissipating sheet 32 as described above, the above-mentioned "part of the energy storage cavity" is a sub-energy storage cavity 111 between two adjacent heat-conducting sheets 31. The above-mentioned "decrease" means a decreasing trend in unit volume, which can be continuous decrease, or discontinuous decrease such as equal difference decrease or stepwise decrease.

[0094] Specifically, the heat-conducting sheet 3 extends from the inner tube 2 to a direction away from the inner tube 2, and the heat-conducting sheet 3 includes the heat-conducting sheet 31 in contact with the inner tube 2 and the outer shell 1 and the heat-dissipating sheet 32 connected to the inner tube 2. At least two heat-conducting sheets 31 divide the energy storage cavity 11 into at least two sub-energy storage cavities 111. The heat-dissipating sheet 32 is located in the sub-energy storage cavity 11, and there is a gap between the heat-dissipating sheet 32 and the outer shell 1.

[0095] The included angle between at least two adjacent heat-conducting sheets 31 ranges from 90° to 180°. The length of the heat-dissipating sheet 32 between the two heat-conducting sheets 31 decreases along the circumference of the inner tube 2, and / or the arrangement density of the heat-dissipating sheet 32 decreases along the circumference of the inner tube 2, so that the heat transfer area of the heat-dissipating sheet 32 decreases from one heat-conducting sheet 31 to the other heat-conducting sheet 31, and the energy storage liquid in the sub-energy storage cavity 111 gradually undergoes phase change along the decreasing direction; and / or the thickness of the heat-dissipating sheet 32 decreases along the circumference of the inner tube 2, so that the heat attenuation of the heat-dissipating sheet 32 increases along the above-mentioned decreasing direction, and thus the energy storage liquid in the sub-energy storage cavity 111 gradually undergoes phase change along the decreasing direction.

[0096] In the first embodiment, please refer to Figures 5-12 The inner tube 2 and the outer tube 12 are arranged concentrically, i.e., the central axis of the inner tube 2 coincides with the central axis of the outer tube 12, so that the entire energy storage device 100 is relatively balanced, easy to manufacture and has a long service life. At this time, at least one of the structure and arrangement density of the heat-conducting sheet 3 is adjusted to control the phase change sequence of the energy storage material in different regions.

[0097] Specifically, please refer to Figures 5-12As shown, at least two heat transfer fins 31 are uniformly distributed along the circumference of the inner tube 2. From one heat transfer fin 31 towards the adjacent heat transfer fin 31, the density of the heat dissipation fins 32 decreases, and / or the length of the heat dissipation fins 32 decreases. Therefore, the sum of the heat transfer areas of the heat dissipation fins 32 in regions with high density or long length is large, and the regions with large heat transfer areas undergo phase change first, while the regions with small heat transfer areas undergo phase change later; this allows the energy storage material to... Figure 7 The arrow direction shown indicates a gradual phase change, preventing the energy storage device 100 from deforming or cracking.

[0098] Specifically, along the circumference of the inner tube 2, the lengths of the heat sinks 32 are the same, and the density between adjacent heat-conducting fins 3 decreases, meaning the angle between adjacent heat-conducting fins 3 increases. The smaller the angle, the smaller the cavity between two adjacent heat-conducting fins 3, and the faster the energy storage material within this cavity acquires cold or heat, resulting in an earlier phase change. The angle between the heat-conducting fins 3 includes the angle between adjacent heat transfer fins 31 and heat sinks 32, and the angle between two adjacent heat sinks 32.

[0099] Alternatively, along the circumference of the inner tube 2, the included angle between adjacent heat-conducting fins 3 is the same, and the length of the heat sink 32 decreases. The longer the heat sink 32, the larger its heat transfer area, and the faster the adjacent energy storage material acquires cold or heat, and the earlier the phase change occurs. Please refer to... Figure 6 As shown, the longer the length La of the heat sink 32, the shorter the distance Lb between the heat sink 32 and the outer casing 1; for example, Lb1 is less than Lb2.

[0100] Preferably, please refer to Figures 6-8 As shown, along the circumference of the inner tube 2, the included angle between adjacent heat-conducting plates 3 increases, and the length of the heat sink 32 decreases. The difference in the rate at which different regions acquire cold or heat is greater, which is more conducive to the gradual phase change.

[0101] Furthermore, along the circumference of the inner tube 2, the thickness of the heat-conducting sheet 3 gradually decreases. The greater the thickness of the heat-conducting sheet, the smaller its heat attenuation, the smaller its thermal resistance, and the faster its heat transfer speed, thus achieving the aforementioned technical effects.

[0102] Furthermore, based on the above specific embodiments, the heat-conducting plate 3 includes two heat transfer plates 31 extending towards the first end and the second end respectively. These two heat transfer plates 31 divide the energy storage cavity 11 into two symmetrically arranged sub-energy storage cavities 111. The heat dissipation plates 32 located in the two sub-energy storage cavities 111 are symmetrically arranged relative to the heat transfer plates 31. Therefore, from the first end to the second end, the phase change rate of the energy storage liquid in the two sub-energy storage cavities 11 is consistent, that is, the phase change rate of the energy storage liquid on both sides of the two heat transfer plates 31 is basically consistent, which can prevent the heat transfer plates 31 from deforming or breaking.

[0103] Please see Figure 7 As shown, the energy storage material at each point within the energy storage cavity 11 obtains either cold or heat from the adjacent inner tube 2, the heat-conducting plate 3, and the outer tube 12. Figure 7 The middle arrows indicate the order in which energy is acquired at different points. During use, when installing the energy storage device 100, the side of the heat-conducting plate 3 with the higher density should be placed at the bottom, and the side with the lower density should be placed at the top, so that the liquid or gaseous energy storage material flows upward and avoids tube expansion.

[0104] Taking the cooling of the energy storage device 100 from the inner tube 2 as an example, between every two heat-conducting plates 3, the energy storage material in the area closer to the inner tube 2 acquires cold energy faster and crystallizes earlier; the energy storage material in the area with a higher density of heat-conducting plates 3 acquires heat or cold energy faster and crystallizes earlier; therefore, the energy storage material gradually undergoes a phase change in the direction indicated by the arrow, and the gas and liquid can flow upward effectively, effectively avoiding tube expansion.

[0105] Additionally, please see Figures 13-18 As shown, the inner tube 2 and the outer tube 12 are eccentrically arranged, that is, the central axis of the inner tube 2 is offset from the central axis of the outer tube 12.

[0106] Specifically, the outer tube 12 has a first end and a second end located on opposite sides of its central axis. After the inner tube 2 is offset towards the first end, the heat exchange rate between the energy storage material located on the first end side and the inner tube 2 is faster than that between the energy storage material located on the second end side and the inner tube 2. If the inner tube 2 is connected to the charging and cooling unit, the energy storage material located on the first end side cools down faster and undergoes a phase change first; while the energy storage material located on the second end side cools down slower and undergoes a phase change later. This can effectively control the phase change of the energy storage material in the energy storage chamber 11 from the first end to the second end, avoiding deformation or cracking of the energy storage device 100 due to disordered phase change direction.

[0107] In the second type of embodiment, please refer to Figure 13 or Figure 14As shown, the offset distance between the central axis of the inner tube 2 and the central axis of the outer tube 12 is not greater than the threshold L1, and the heat-conducting plate 3 extends outward from the inner tube 2 along the radial direction of the inner tube 2.

[0108] In one specific embodiment, such as Figure 13 The included angles between adjacent heat-conducting plates 3 are equal along the circumference of the inner tube 2, and the lengths of the heat sinks 31 are the same. Based on the eccentric arrangement of the inner tube 2, it is also beneficial for the energy storage material to gradually undergo phase change.

[0109] The heat-conducting plate 3 includes two heat transfer plates 31, and the two heat transfer plates 31 divide the energy storage cavity 11 into two sub-energy storage cavities 111; the heat-conducting plate 3 also includes a plurality of heat dissipation plates 32 connected to the inner tube 2 and located in the sub-energy storage cavity 111, the heat dissipation plates 32 having a gap with the outer shell 1, and in each sub-energy storage cavity 111, the plurality of heat dissipation plates 32 are evenly arranged along the circumference of the inner tube 2.

[0110] Preferably, the heat sinks 32 located in the two sub-energy storage cavities 111 are symmetrically arranged relative to the heat transfer plates 31.

[0111] like Figure 14 As shown, the arrangement of the heat sink 32 is similar to... Figures 6-8 The embodiments shown are the same and will not be described again here. Based on the eccentric arrangement of the inner tube 2, and the combined effect of reduced length or density of the heat sink 32, the energy storage material is more conducive to undergoing a gradual phase change.

[0112] In the third type of embodiment, please refer to Figures 15-18 As shown, the inner tube 2 is offset from the central axis of the outer tube 12 at the first end, and the offset distance is not less than the threshold L2. At this time, the offset distance of the inner tube 2 is large, and the amount of cold or heat it carries is much greater than that of the heat-conducting plate 3. Therefore, the amount of heat or cold obtained by the energy storage material from the inner tube 2, the heat-conducting plate 3 and the outer tube 12 generally decreases from the first end to the second end. This causes the energy storage material to gradually undergo phase change in one direction, avoiding phase change from multiple directions towards the middle, which would cause the energy storage device 100 to deform or crack.

[0113] Specifically, such as Figure 15 As shown, when the offset distance is between the threshold L2 and the threshold L3, L2 is less than L3; the heat sinks all extend outward from the inner tube 2.

[0114] In one embodiment, two heat transfer plates 31 extending toward the first end and the second end respectively divide the energy storage cavity 11 into two symmetrically arranged sub-energy storage cavities 111. A plurality of heat dissipation plates 32 are in contact with the inner tube 2 and there is a gap between the heat dissipation plates 32 and the outer shell 1. In the sub-energy storage cavity 111, along the circumference of the inner tube 2 from the first end to the second end, the length and / or arrangement density of the heat dissipation plates 32 increase.

[0115] Specifically, along the circumference of the inner tube 2 from the first end to the second end, the lengths of the heat sinks 32 are the same, and the included angle between adjacent heat-conducting plates 3 decreases. Alternatively, along the circumference of the inner tube 2 from the first end to the second end, the included angle between adjacent heat-conducting plates 3 is the same, and the length of the heat-conducting plates 3 increases. Preferably, along the circumference of the inner tube 2 from the first end to the second end, the included angle between adjacent heat-conducting plates 3 decreases, and the length of the heat-conducting plates 3 increases.

[0116] In the above specific embodiments, due to the large offset distance of the inner tube 2, the heat or cold energy obtained by the energy storage material from the inner tube 2, the heat-conducting plate 3 and the outer tube 12 tends to decrease from the first end to the second end; this causes the energy storage material to gradually undergo phase change in one direction, avoiding phase change from multiple directions towards the middle, which would cause the energy storage device 100 to deform or crack; at the same time, the energy storage speed of the entire energy storage device 100 is relatively fast.

[0117] Furthermore, the heat sinks 32 located in the two sub-energy storage cavities 111 are symmetrically arranged relative to the heat transfer plates 31.

[0118] When the offset distance is not less than the threshold L3, L2 is less than L3, and the distance between the inner tube 2 and the outer tube 12 is relatively close. If the heat sink 32 extends towards the offset side, the distance between the heat sink 32 and the outer tube 12 will be relatively close, which is not conducive to the flow of liquid or gaseous energy storage materials. Therefore, the heat sink 32 extends from the inner tube 2 beyond the first end and simultaneously in a direction away from the inner tube 2.

[0119] For details, please refer to Figures 16-18 As shown, from the first end to the second end, the length of the heat sink 32 increases, but the heat or cold energy obtained by the energy storage material from the inner tube 2, the heat-conducting plate 3 and the outer tube 12 generally shows a decreasing trend.

[0120] In practical use, the first end of the energy storage chamber 11 is placed at the bottom and the second end of the energy storage chamber 11 is placed at the top, so that the liquid or gaseous energy storage material flows upward and avoids tube expansion.

[0121] Further, the outer wall of the shell 1 is provided with an indication indicating the first end and / or the second end; or in other words, the indication indicates the direction of the above-mentioned reduction, so as to prompt the installation of the energy storage device 100, so as to avoid placing the side with small heat transfer density downwardly and causing the expansion and cracking phenomenon.

[0122] In addition, based on all the above embodiments, the inner tube 2, the heat conducting sheet 3 and the outer tube 12 are integrally formed or integrally arranged, and the heat transfer effect is far superior to the post-assembly scheme. Preferably, aluminum or aluminum alloy material is light in weight and fast in heat transfer speed.

[0123] Specific processing technology is that the inner tube 2, the heat conducting sheet 31 and the outer tube 12 are integrally formed; the flow channel 14 is formed at the edge of the heat conducting sheet 3 along the axial direction of the inner tube 2, for example, part of the heat conducting sheet 3 is removed, so that the heat conducting sheet 3 is located in the outer tube 12; the end cover 13 is welded with the shell 1; the energy storage material is injected into the energy storage cavity 11 from the injection port 131, and then the injection port 131 is sealed.

[0124] The energy storage assembly 200 further comprises a fixing unit 5 for fixing the energy storage device 100, the fixing unit 5 comprises a fixing shell 52 surrounding the energy storage device 100, and a clamping strip 51 matched with the fixing shell 52 for positioning and clamping the energy storage device 100, the clamping strip 51 is provided with positioning grooves matched with the shell of the energy storage device 100, and the number of the positioning grooves is consistent with the number of the energy storage devices 100 in one row, so as to prevent the energy storage device from being displaced under external force.

[0125] The application further provides a cold charging and cold storage system, comprising a cold source with a load refrigerant and the above-mentioned any one kind of energy storage assembly 100, and the inlet 4a and the outlet 4b of the energy storage channel are respectively connected to two ends of the cold source.

[0126] A cold charging and cold storage system, comprising a compressor, a condenser communicated with the compressor, a throttling element communicated with the condenser, the above-mentioned any one kind of energy storage assembly 200, the inlet 4a of the energy storage channel is connected with the throttling element, and the outlet 4b of the energy storage channel is connected with the compressor. In this embodiment, the refrigerant compressed by the compressor is used as the load refrigerant to provide cold energy for the energy storage assembly 200.

[0127] The application further provides a cold storage box, comprising the above-mentioned any one kind of energy storage device 100, or the above-mentioned any one item of cold charging and cold storage system, or the above-mentioned any one kind of cold storage and cold supply system.

[0128] In summary, the energy storage assembly 200 of the present application, the cold carrier enters the energy storage assembly 200 from the inlet 4a of the energy storage channel, exchanges heat with the energy storage devices 100 from bottom to top, and then flows out of the energy storage assembly 200 through the outlet 4b of the energy storage channel. Therefore, the energy storage devices 100 in the lower row obtain heat or cold before the energy storage devices 100 above them, and the energy storage devices 100 in the lower row can provide heat or cold to the energy storage devices 100 above them through heat radiation or contact heat transfer, ensuring that the lower energy storage materials undergo phase change before the upper energy storage materials, and avoiding the phenomenon of deformation or rupture of the energy storage devices 100.

[0129] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0130] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. An energy storage assembly, characterized by, The energy storage assembly comprises: a plurality of energy storage devices arranged from bottom to top; the energy storage device comprises an outer shell, an inner tube with a flow channel, and a plurality of heat-conducting sheets connected to the outer wall of the inner tube; the inner tube is arranged in the outer shell, and the inner tube and the outer shell form an energy storage cavity for sealing and storing energy storage materials; the heat-conducting sheets are arranged in the energy storage cavity; the length of the heat-conducting sheets decreases along the circumference of the inner tube, and / or the arrangement density of the heat-conducting sheets decreases along the circumference of the inner tube, and / or the thickness of the heat-conducting sheets decreases along the circumference of the inner tube; an energy storage channel, which is connected to the energy storage devices from bottom to top, and the inlet of the energy storage channel is located at the lowest row of energy storage devices, and the outlet of the energy storage channel is located at the highest row of energy storage devices.

2. The energy storage assembly of claim 1, wherein, Each row comprises at least two energy storage devices, and the energy storage device comprises a flow channel; the energy storage assembly further comprises a connecting pipe with a flow passage, which comprises an intra-row connecting pipe connected in series to the flow channels of the energy storage devices in each row, and an inter-row connecting pipe connected to the flow channels of the two energy storage devices corresponding in the adjacent rows in the up-down direction; the flow channel and the flow passage jointly form the energy storage channel.

3. The energy storage assembly of claim 1, wherein, Each row comprises only one energy storage device, and the energy storage device comprises a flow channel; the energy storage assembly further comprises a connecting pipe with a flow passage, which is connected to the flow channels of the adjacent two energy storage devices; the flow channel and the flow passage jointly form the energy storage channel.

4. The energy storage assembly of claim 1, wherein, Each row comprises at least two energy storage devices, and the energy storage device comprises a flow channel; the energy storage assembly further comprises a connecting pipe with a flow passage, which comprises an intra-row connecting pipe arranged in series in the flow channel of each row, and an inter-row connecting pipe connected to the intra-row connecting pipes in the two energy storage devices corresponding in the adjacent rows in the up-down direction; the inlet of the connecting pipe is located at any one of the energy storage devices in the lowest row, and the outlet of the connecting pipe is located at any one of the energy storage devices in the highest row.

5. The energy storage assembly of claim 1, wherein, Each row comprises only one energy storage device, and the energy storage device comprises a flow channel; the energy storage assembly further comprises a connecting pipe with a flow passage, which is connected to the flow channels of the adjacent two energy storage devices; the flow channel and the flow passage jointly form the energy storage channel.

6. The energy storage assembly of claim 1, wherein, The outer shell comprises an outer tube with a first end and a second end located on opposite sides of the axis; the inner tube is arranged in the outer tube, the inner tube is parallel to the outer tube, and the inner tube is offset to the first end relative to the outer tube.

7. The energy storage assembly of claim 6, wherein, The offset distance between the central axis of the inner tube and the central axis of the outer tube is not greater than a threshold value L1, and the heat-conducting sheets extend outwardly along the radial direction of the inner tube.

8. The energy storage assembly of claim 6, wherein, The distance between the central axis of the inner tube and the central axis of the outer tube is not less than a threshold value L2, and the length and / or arrangement density of the heat-conducting sheets contacting the inner tube on the side of the first end is less than the heat-conducting sheets contacting the inner tube on the side of the second end.

9. The energy storage assembly of claim 1, wherein, The energy storage assembly further comprises a fixing unit for fixing the energy storage device, the fixing unit comprising a fixing shell, a clamping strip matched with the fixing shell to position and fix the energy storage device, the clamping strip having a positioning groove for preventing the energy storage device from being displaced under external force.

10. A charge-cooling cold storage system, characterized by, Comprise: A cold source with built-in coolant; The energy storage assembly according to any one of claims 1-9, wherein the inlet and outlet of the energy storage channel are respectively connected to two ends of the cold source.

11. A charge-cooling cold storage system, characterized by, Comprise a compressor, a condenser communicated with the compressor, a throttling element communicated with the condenser, and the energy storage assembly according to any one of claims 1-9, wherein the inlet of the energy storage channel is connected to the throttling element, and the outlet of the energy storage channel is connected to the compressor.

12. A cold chain shipping box characterized in that, The cold chain transport box comprises the energy storage assembly according to any one of claims 1-9.

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