Temperature control structure and energy storage system

Abstract

The utility model discloses a temperature control structure and an energy storage system, and belongs to the technical field of energy storage. The temperature control structure is arranged between two adjacent battery cell groups, and the temperature control structure comprises a body which is arranged between two adjacent battery cell groups and is provided with an accommodating cavity; the first interface is communicated with the accommodating cavity and is used for accessing a filling medium; the filling medium accessed by the first interface flows into the accommodating cavity; and when the filling medium in the accommodating cavity is greater than the initial capacity threshold value of the accommodating cavity, the body expands between the two battery cell groups. Thus, when the body expands between the two battery cell groups, more filling media are contained in the containing cavity, so that the two sides of the body can be in contact with the two battery cell groups at the same time, and the two battery cell groups share one temperature control structure for heat conduction.

Description

Technical Field

[0001] This application belongs to the field of energy storage technology, specifically relating to a temperature control structure and energy storage system. Background Technology

[0002] When installing battery cells layer by layer in an energy storage system, a gap needs to be reserved between adjacent battery cells to accommodate the cooling structure. However, this method can prevent the cooling structure of the upper battery cells from dissipating heat to the lower battery cells. Utility Model Content

[0003] Purpose of this application: This application provides a temperature control structure to solve the problem that the cooling structure of the upper battery cell assembly cannot dissipate heat to the lower battery cell assembly; this application also provides an energy storage system.

[0004] Technical solution: This application provides a temperature control structure disposed between two adjacent battery cell groups. The temperature control structure includes:

[0005] The body, designed to be positioned between two adjacent battery cell groups, has a receiving cavity;

[0006] The first interface is connected to the receiving cavity and is used to connect the filling medium;

[0007] The filling medium connected to the first interface flows into the receiving cavity; when the filling medium in the receiving cavity is greater than the initial capacity threshold of the receiving cavity, the body expands between the two battery cells.

[0008] In some embodiments, it also includes:

[0009] The second interface is connected to the receiving cavity and is used to allow the filling medium to flow out of the receiving cavity; when the filling medium in the receiving cavity is less than or equal to the initial capacity threshold, the body contracts between the two battery cell groups, causing the body to contract between the two battery cell groups.

[0010] In some embodiments, the body includes:

[0011] Relatively positioned heat-conducting surfaces;

[0012] When the body expands between the two battery cell groups, the two thermally conductive surfaces each contact one of the battery cell groups; when the body contracts between the two battery cell groups, at least one of the thermally conductive surfaces contacts one of the battery cell groups.

[0013] In some embodiments, the body further comprises:

[0014] A folded surface is disposed between the two heat-conducting surfaces; when the folded surface extends, the temperature control structure expands between the two battery cell groups; when the folded surface folds inward to the body, the temperature control structure contracts between the two battery cell groups.

[0015] In some embodiments, the first interface and the second interface are spaced apart on the folded surface.

[0016] In some embodiments, the temperature control structure further includes:

[0017] A first sealing structure is detachably disposed on the side of the first interface away from the body;

[0018] The second sealing structure is detachably disposed on the side of the second interface away from the body.

[0019] In some embodiments, the temperature control structure is further configured to be disposed between two adjacent battery modules, and / or, the temperature control structure is further configured to be disposed between two adjacent battery packs.

[0020] In some embodiments, the body is an elastic body or a soft metal body.

[0021] In some embodiments, the filling medium includes: water, ethylene glycol, mineral oil, mercury, gallium and its alloys, copper nanoparticle solution, aluminum nanoparticle solution, or fluorinated liquid.

[0022] Accordingly, this application provides an energy storage system, comprising:

[0023] At least two battery cell groups, and the two battery cell groups are electrically connected;

[0024] The temperature control structure as described in any of the above embodiments is disposed between two adjacent battery cell groups;

[0025] Specifically, when the temperature control structure expands between the two battery cell groups, the temperature control structure contacts both battery cell groups; when the temperature control structure contracts between the two battery cell groups, the temperature control structure contacts at least one of the battery cell groups.

[0026] In some embodiments, the battery cell assembly has a top surface and a bottom surface disposed opposite to each other, and at least one thermally conductive surface of the temperature control structure is connected to the top surface or the bottom surface.

[0027] In some embodiments, the energy storage system further includes:

[0028] A first connecting layer is disposed on the side of the temperature control structure facing the battery cell assembly, and the side of the first connecting layer away from the temperature control structure is connected to the battery cell assembly.

[0029] In some embodiments, the energy storage system further includes:

[0030] The second connection layer is disposed on the side of the battery cell assembly facing the temperature control structure, and the side of the second connection layer away from the battery cell assembly is connected to the temperature control structure.

[0031] Beneficial Effects: Compared with the prior art, the temperature control structure provided in this application embodiment is disposed between two adjacent battery cell groups. The temperature control structure includes: a body for being disposed between two adjacent battery cell groups, having a receiving cavity; a first interface communicating with the receiving cavity for receiving a filling medium; the filling medium received through the first interface flows into the receiving cavity; when the filling medium in the receiving cavity exceeds the initial capacity threshold of the receiving cavity, the body expands between the two battery cell groups. Thus, when the body expands between the two battery cell groups, the receiving cavity contains more filling medium, allowing both sides of the body to simultaneously contact the two battery cell groups, and the two battery cell groups share a single temperature control structure for heat conduction.

[0032] It is understood that, compared with the prior art, the energy storage system provided in this application embodiment includes all the technical features and effects of the above-mentioned temperature control structure, and will not be repeated here. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the temperature control structure during expansion, provided in an embodiment of this application.

[0035] Figure 2 This is a schematic diagram of the temperature control structure during contraction, provided in an embodiment of this application.

[0036] Figure 3 A partial structural diagram of the temperature control structure provided in the embodiment of this application during contraction;

[0037] Figure 4 This is a schematic diagram of the internal structure of an energy storage system provided in an embodiment of this application;

[0038] Figure 5A schematic diagram of the connection between the first connection layer and the temperature control structure of the energy storage system provided in the embodiments of this application;

[0039] Figure 6 A schematic diagram of the connection of the second connection layer of the energy storage system provided in the embodiments of this application.

[0040] Reference numerals: 10-Temperature control structure; 11-Body; 111-Receiving cavity; 112-Heat-conducting surface; 113-Folded surface; 12-First interface; 13-Second interface; 14-Flow channel; 20-Cell assembly; 21-Top surface; 22-Bottom surface; 30-First connecting layer; 40-Second connecting layer. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. In the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0043] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of exemplary embodiments and may not be to scale. The modules or processes shown in the drawings are not necessarily essential for implementing this application and therefore should not be used to limit the scope of protection of this application.

[0044] The applicant discovered that when installing battery cell packs 20 layer by layer in an energy storage system, a gap needs to be reserved between adjacent battery cell packs 20 to accommodate cooling structures. However, this method prevents the cooling structure of the upper battery cell pack 20 from dissipating heat to the lower battery cell pack 20. Therefore, battery cell packs 20 are typically stacked directly in the energy storage system to share cooling structures. However, when maintenance or repair is required for the lower or bottom battery cell packs 20, it is necessary to remove the battery cell packs 20 layer by layer from the top, resulting in a huge workload.

[0045] In view of this, this application provides a temperature control structure 10, please refer to... Figure 1 , Figure 2 and Figure 3 , Figure 1 This illustration shows a schematic diagram of the temperature control structure provided in an embodiment of this application during expansion. Figure 2 This illustration shows a schematic diagram of the temperature control structure provided in an embodiment of this application during contraction. Figure 3 This illustration shows a partial structural diagram of the temperature control structure provided in this application during contraction. The temperature control structure 10 provided in this application is disposed between two adjacent battery cell groups 20. The temperature control structure 10 includes a body 11 and a first interface 12. The body 11 is disposed between the two adjacent battery cell groups 20 and has a receiving cavity 111. The first interface 12 communicates with the receiving cavity 111 and is used to receive a filling medium. The filling medium received through the first interface 12 flows into the receiving cavity 111. When the filling medium in the receiving cavity 111 exceeds the initial capacity threshold of the receiving cavity 111, the body 11 expands between the two battery cell groups 20. It should be noted that the initial capacity threshold is the criterion for determining when the body 11 expands; it can be expressed as the capacity of the receiving cavity 111 when the body 11 is in its natural state and there is no filling medium. Furthermore, the filling medium in this application can be either a gas or a liquid, and can be used for cooling or heat preservation. Thus, when the body 11 expands between the two battery cell groups 20, the cavity 111 contains more filling medium, allowing the two sides of the body 11 to contact the two battery cell groups 20 respectively, and the two battery cell groups 20 share a temperature control structure 10 for heat conduction.

[0046] In some embodiments, the temperature control structure 10 further includes a second interface 13 communicating with the receiving cavity 111 for discharging a filling medium from the receiving cavity 111. When the filling medium in the receiving cavity 111 is less than or equal to the initial capacity threshold, the body 11 contracts between the two battery cell groups 20. Thus, when the body 11 contracts between the two battery cell groups 20, the filling medium contained in the receiving cavity 111 decreases, allowing the body 11 to remain in contact with both sides of the two battery cell groups 20 simultaneously when the temperature control structure 10 is placed between two battery cell groups 20 with a small installation gap, and the two battery cell groups 20 share a single temperature control structure 10 for heat conduction.

[0047] Specifically, the temperature control structure provided in this embodiment is used to conduct heat to the battery cell assembly 20. The body 11 can expand and contract. When the body 11 expands between the two battery cell assemblies 20, the volume of the receiving cavity 111 is greater than the volume of the receiving cavity 111 when the body 11 contracts between the two battery cell assemblies 20. That is, the expansion or contraction range of the body 11 is related to the increase or decrease of the capacity of the filling medium in the receiving cavity 111. The first interface 12 is used to introduce the filling medium into the receiving cavity 111, so that the body 11 expands between the two battery cell assemblies 20 to adapt to different installation gaps between the two battery cell assemblies 20, and the temperature control structure 10 can conduct heat through the filling medium. At the same time, the first interface 12 can also be used to export the filling medium from the receiving cavity 111, so that the body 11 contracts between the two battery cell assemblies 20 to adapt to different installation gaps between the two battery cell assemblies 20. To further enhance the flow guidance effect on the filling medium, the first interface 12 and the second interface 13 may have a flow guidance channel 14. The flow guidance channel 14 is connected to the receiving cavity 111, and the filling medium is guided through the flow guidance channel 14 to improve the inlet and outlet speed of the filling medium. In other words, the temperature control structure 10 of this application can flexibly and controllably expand or contract, thereby introducing and exporting the filling medium as needed to meet the heat conduction requirements or disassembly requirements of the battery cell assembly 20.

[0048] It is understood that the temperature control structure 10 of this application is used to conduct heat to the battery cell assembly 20. When the body 11 expands between the two battery cell assemblies 20, the temperature control structure 10 has a larger volume of the receiving cavity 111, so that both sides of the body 11 can contact the two battery cell assemblies 20 at the same time, that is, the two battery cell assemblies 20 share one temperature control structure 10 for heat conduction; at the same time, when the body 11 contracts between the two battery cell assemblies 20, the temperature control structure 10 has a smaller volume of the receiving cavity 111, so that an installation gap is left between the two adjacent battery cell assemblies 20, and the temperature control structure 10 can be disassembled at the same time as the battery cell assembly 20, so as to facilitate the replacement or maintenance of the battery cell assembly 20.

[0049] In some embodiments, the body 11 includes: opposing heat-conducting surfaces 112; when the body 11 expands between two battery cell groups 20, the two heat-conducting surfaces 112 respectively contact one battery cell group 20; when the body 11 contracts between the two battery cell groups 20, at least one heat-conducting surface 112 contacts one battery cell group 20. Specifically, the heat conduction effect of the temperature control structure 10 on the battery cell group 20 is achieved through the contact between the heat-conducting surfaces 112 and the battery cell group 20. When the body 11 expands between the two battery cell groups 20, both heat-conducting surfaces 112 contact another adjacent battery cell group 20; when the temperature control structure 10 contracts between the two battery cell groups 20, at least one heat-conducting surface 112 forms an installation gap with another adjacent battery cell group 20 to facilitate the installation or removal of the battery cell group 20. Secondly, when the body 11 expands between the two battery cell groups 20, the two heat-conducting surfaces 112 contact one of the battery cell groups 20 respectively, thereby maximizing the contact area between the heat-conducting surfaces 112 and the battery cell groups 20, thus improving the heat conduction efficiency. Simultaneously, when the body 11 contracts between the two battery cell groups 20, at least one heat-conducting surface 112 remains in contact with the battery cell group 20, ensuring the continuity of the heat conduction effect. This allows the temperature control structure 10 to adapt to different operating states, providing a certain degree of heat conduction performance regardless of expansion or contraction. Finally, by having two heat-conducting surfaces 112 contact the battery cell groups 20, this application enables the two battery cell groups 20 to share a single temperature control structure 10, achieving more uniform heat conduction, avoiding hot spots concentrated in a specific area, reducing heat accumulation and temperature unevenness, and improving the heat dissipation effect of the battery cell groups 20.

[0050] In some embodiments, the body 11 further includes: a folded surface 113 disposed between two heat-conducting surfaces 112; when the folded surface 113 extends, the temperature control structure 10 expands between the two battery cell groups 20; when the folded surface 113 folds inward toward the body 11, the temperature control structure 10 contracts between the two battery cell groups 20. It can be understood that in this embodiment, the expansion or contraction of the temperature control structure 10 between the two battery cell groups 20 is equivalent to the expansion or contraction of the body 11 between the two battery cell groups 20. The folded surface 113 and the two heat-conducting surfaces 112 enclose and form the body 11, and form a receiving cavity 111 inside. Specifically, this application allows for flexible adjustment of the state of the temperature control structure 10 through the extension and folding of the folded surface 113. When the folded surface 113 extends, the temperature control structure 10 expands between the two battery cell groups 20, and the two heat-conducting surfaces 112 can contact one battery cell group 20 respectively, increasing the contact area between the heat-conducting surfaces 112 and the battery cell group 20, thus improving the heat conduction effect. When the folding surface 113 folds inward toward the body 11, the temperature control structure 10 contracts between the two battery cell groups 20, with only one heat-conducting surface 112 in contact with the battery cell group 20, thereby forming an installation gap between at least one heat-conducting surface 112 and another adjacent battery cell group 20 to facilitate the installation or removal of the battery cell group 20.

[0051] In some embodiments, the first interface 12 and the second interface 13 are spaced apart on the folded surface 113. In the temperature control structure 10, the heat-conducting surface 112 contacts or separates from the battery pack 20 as the state of the body 11 changes, while the folded surface 113 never contacts the battery pack 20. Therefore, by placing the first interface 12 and the second interface 13 on the folded surface 113, this application avoids the first interface 12 and the second interface 13 from affecting the installation of the battery pack 20, and also avoids the battery pack 20 from blocking the first interface 12 and the second interface 13, thus ensuring the conductivity of the flow channels 14 in the first interface 12 and the second interface 13. In addition, the spaced arrangement of the first interface 12 and the second interface 13 can also ensure the uniform distribution and flow of the filling medium inside the receiving cavity 111, avoiding heat concentration and temperature non-uniformity.

[0052] In some embodiments, the temperature control structure 10 further includes: a first sealing structure detachably disposed on the side of the first interface 12 away from the body 11; and a second sealing structure detachably disposed on the side of the second interface 13 away from the body 11. Specifically, the arrangement of the first sealing structure and the second sealing structure can improve the sealing performance of the temperature control structure 10. By placing the first sealing structure on the side of the first interface 12 away from the body 11 and the second sealing structure on the side of the second interface 13 away from the body 11, leakage of the filling medium or entry of external impurities can be effectively prevented. By disassembling and reinstalling the first sealing structure and the second sealing structure, the opening and closing of the first interface 12 and the second interface 13 can be achieved.

[0053] In some embodiments, the temperature control structure 10 is further configured to be disposed between two adjacent battery modules, and / or, the temperature control structure 10 is further configured to be disposed between two adjacent battery packs. Thus, when the body 11 expands between two battery modules or two battery packs, the receiving cavity 111 contains more filling medium, allowing both sides of the body 11 to simultaneously contact two battery modules or two battery packs, with the two battery modules or two battery packs sharing a single temperature control structure 10 for heat conduction.

[0054] In some embodiments, the body 11 is an elastic body or a soft metal body. That is, the material of the body 11 includes: elastomers such as rubber, soft metals such as aluminum, and synthetic elastomer materials such as thermoplastic elastomers (TPE) and polyurethane (PU). Among them, soft metals refer to metal materials with relatively low hardness. It can be understood that the material selection of the body 11 should preferably be a material with strong thermal conductivity and easy deformation, so as to meet the expansion or contraction requirements of the body 11, and better realize the heat conduction, removal or reinstallation of the battery cell group 20, battery module or battery pack on both sides.

[0055] In some embodiments, the filling medium includes: water, ethylene glycol, mineral oil, mercury, gallium and its alloys, copper nanoparticle solution, aluminum nanoparticle solution, or fluorinated liquid. Specifically, water has a high specific heat capacity, good thermal conductivity, and low cost; ethylene glycol has a low freezing point and a high boiling point, making it suitable for both low and high temperature environments; mineral oil has good thermal stability, excellent electrical insulation, and good material compatibility; mercury has high thermal conductivity and a moderate liquid range; gallium and its alloys have low melting points, good wettability, and strong thermal conductivity; copper nanoparticle solution and aluminum nanoparticle solution improve thermal conductivity through nanoparticles and offer high customizability. These filling media can meet the thermal conductivity requirements of temperature control structures in different scenarios, ensuring the safe and stable operation of the battery cell assembly 20 on both sides.

[0056] Accordingly, please refer to Figure 4 , Figure 5 and Figure 6 . Figure 4This application illustrates the internal structure of an energy storage system provided in an embodiment. Figure 5 This illustration shows the connection diagram between the first connection layer and the temperature control structure of the energy storage system provided in an embodiment of this application; Figure 6 This illustration shows a connection diagram of the second connection layer of the energy storage system provided in an embodiment of this application. This application also provides an energy storage system, including: a cabinet having a receiving space; at least two battery cell groups 20, arranged in layers within the receiving space, and electrically connected; a temperature control structure 10 as described in any of the above embodiments, the temperature control structure 10 being disposed between two adjacent battery cell groups 20; wherein, when the temperature control structure 10 expands between the two battery cell groups 20, the temperature control structure 10 contacts the two battery cell groups 20; when the temperature control structure 10 contracts between the two battery cell groups 20, the temperature control structure 10 contacts at least one battery cell group 20. Thus, when the body 11 expands between the two cell groups 20, the temperature control structure 10 has a larger volume of accommodating cavity 111, allowing both sides of the body 11 to simultaneously contact the two cell groups 20. That is, the two cell groups 20 share a single temperature control structure 10 for heat conduction. Simultaneously, when the body 11 contracts between the two cell groups 20, the temperature control structure 10 has a smaller volume of accommodating cavity 111, allowing for an installation gap between adjacent cell groups 20. The temperature control structure 10 can be disassembled simultaneously with the cell groups 20 for easy replacement or repair. It is understood that the cell group 20 can also be a battery module, battery pack, battery cluster, or other cell assembly structure. The temperature control structure provided in this application can achieve simultaneous heat conduction from both sides.

[0057] In some embodiments, the battery cell assembly 20 has a top surface 21 and a bottom surface 22 disposed opposite to each other, and at least one heat-conducting surface 112 of the temperature control structure 10 is connected to the top surface 21 or the bottom surface 22. Thus, by connecting the heat-conducting surface 112 of the temperature control structure 10 to the top surface 21 or the bottom surface 22 of the battery cell assembly 20, heat conduction between the temperature control structure 10 and the battery cell assembly 20 is achieved through the top surface 21 and the heat-conducting surface 112, or through the bottom surface 22 and the heat-conducting surface. It is understood that when another battery cell assembly 20 is disposed on only one side of the top surface 21 or the bottom surface 22, a temperature control structure 10 can be disposed on both the top surface 21 and the bottom surface 22 as needed to enhance the heat conduction effect.

[0058] In some embodiments, the energy storage system further includes: a plurality of mounting brackets spaced apart on the inner wall of the cabinet, and the battery cell assembly 20 is detachably mounted on the mounting brackets. Specifically, the temperature control structure 10 can be detachably mounted on the mounting bracket along with the battery cell assembly 20. When the temperature control structure 10 is mounted on the top surface 21 of the battery cell assembly 20, after expanding between two battery cell assemblies 20, the temperature control structure 10 can contact the bottom surface 22 of the adjacent battery cell assembly 20, and the two adjacent battery cell assemblies 20 share a single temperature control structure 10 for heat conduction. Similarly, if the temperature control structure 10 is mounted on the bottom surface 22 of the battery cell assembly 20, after expanding between two battery cell assemblies 20, the temperature control structure 10 can contact the top surface of the adjacent battery cell assembly 20, and the two adjacent battery cell assemblies 20 share a single temperature control structure 10 for heat conduction. When it is necessary to disassemble a cell pack 20, the filling medium in the temperature control structure 10 connected to the cell pack 20 is discharged, causing the temperature control structure 10 to contract between the two cell packs 20. This allows both the cell pack 20 and the temperature control structure 10 to be simultaneously pulled out of the mounting bracket. Furthermore, the mounting bracket provides additional support and fixation for the cell pack 20, ensuring its safety and stability, preventing movement or tilting, reducing the risk of accidental collisions or damage, and ensuring the safe operation of the energy storage system.

[0059] In some embodiments, the energy storage system further includes a first connecting layer 30, disposed on the side of the temperature control structure 10 facing the cell assembly 20, and the side of the first connecting layer 30 facing away from the temperature control structure 10 connected to the cell assembly 20. Specifically, the first connecting layer 30 can be an adhesive backing disposed on the side of the temperature control structure 10 facing the cell assembly 20. Thus, the embodiments of this application achieve stability of the connection between the temperature control structure 10 and the cell assembly 20 through the first connecting layer 30. It is understood that the first connecting layer 30 can also be a temperature control structural adhesive, thereby achieving heat transfer between the temperature control structure 10 and the cell assembly 20 while connecting them.

[0060] In some embodiments, the energy storage system further includes a second connecting layer 40, disposed on the side of the cell assembly 20 facing the temperature control structure 10, with the side of the second connecting layer 40 facing away from the cell assembly 20 connected to the temperature control structure 10. Similarly, the second connecting layer 40 can be an adhesive backing disposed on the side of the cell assembly 20 facing the temperature control structure 10. Thus, in this embodiment, the second connecting layer 40 ensures the stability of the connection between the temperature control structure 10 and the cell assembly 20. It is understood that the second connecting layer 40 can also be a temperature control structural adhesive, thereby achieving heat transfer between the temperature control structure 10 and the cell assembly 20 while connecting them.

[0061] It is understood that, compared with the prior art, the energy storage system provided in this application embodiment includes all the technical features and effects of the above-mentioned temperature control structure, and will not be repeated here.

[0062] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0063] The temperature control structure and energy storage system provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A temperature control structure, characterized by, The temperature control structure (10) comprises: a body (11) arranged between two adjacent battery cell groups (20), having a receiving cavity (111); a first interface (12) in communication with the receiving cavity (111) for accessing a filling medium; the filling medium accessed by the first interface (12) flows into the receiving cavity (111); when the filling medium in the receiving cavity (111) is greater than an initial capacity threshold of the receiving cavity (111), the body (11) expands between the two battery cell groups (20).

2. The temperature control structure of claim 1, wherein, Further comprising: a second interface (13) in communication with the receiving cavity (111) for flowing the filling medium out of the receiving cavity (111); when the filling medium in the receiving cavity (111) is less than or equal to the initial capacity threshold, the body (11) contracts between the two battery cell groups (20), so that the body (11) contracts between the two battery cell groups (20).

3. The temperature control structure of claim 2, wherein, The body (11) comprises: oppositely arranged heat-conducting surfaces (112); when the body (11) expands between the two battery cell groups (20), the two heat-conducting surfaces (112) are respectively in contact with one of the battery cell groups (20); when the body (11) contracts between the two battery cell groups (20), at least one of the heat-conducting surfaces (112) is in contact with one of the battery cell groups (20).

4. The temperature control structure of claim 3, wherein, The body (11) further has: a folding surface (113) arranged between the two heat-conducting surfaces (112); when the folding surface (113) is stretched, the temperature control structure (10) expands between the two battery cell groups (20); when the folding surface (113) is folded towards the inside of the body (11), the temperature control structure (10) contracts between the two battery cell groups (20).

5. The temperature control structure of claim 4, wherein, The first interface (12) and the second interface (13) are arranged at intervals on the folding surface (113).

6. The temperature control structure of claim 2, wherein, The temperature control structure (10) further comprises: a first sealing structure detachably arranged on a side of the first interface (12) away from the body (11); a second sealing structure detachably arranged on a side of the second interface (13) away from the body (11).

7. The temperature control structure of claim 1, wherein, The temperature control structure (10) is further arranged between two adjacent battery modules, and / or the temperature control structure (10) is further arranged between two adjacent battery packs.

8. The temperature control structure of claim 1, wherein, The body (11) is an elastic body or a soft metal body.

9. The temperature control structure of claim 1, wherein, The filling medium comprises water, ethylene glycol, mineral oil, mercury, gallium and its alloy, copper nano solution, aluminum nano solution, or fluorinated liquid.

10. An energy storage system characterized by, The temperature control structure (10) comprises: at least two battery cell groups (20) electrically connected; the temperature control structure (10) according to any one of claims 1 to 9, arranged between two adjacent battery cell groups (20); When the temperature control structure (10) expands between the two cell groups (20), the temperature control structure (10) is in contact with the two cell groups (20); when the temperature control structure (10) contracts between the two cell groups (20), the temperature control structure (10) is in contact with at least one cell group (20).

11. The energy storage system of claim 10, wherein, The cell group (20) has oppositely arranged top and bottom surfaces (21, 22), and at least one heat-conducting surface (112) of the temperature control structure (10) is connected to the top or bottom surface (21, 22).

12. The energy storage system of claim 10, wherein, The energy storage system further comprises: A first connecting layer (30) is arranged on a side of the temperature control structure (10) facing the cell group (20), and a side of the first connecting layer (30) facing away from the temperature control structure (10) is connected to the cell group (20).

13. The energy storage system of claim 10, wherein, The energy storage system further comprises: A second connecting layer (40) is arranged on a side of the cell group (20) facing the temperature control structure (10), and a side of the second connecting layer (40) facing away from the cell group (20) is connected to the temperature control structure (10).

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