energy storage system

Abstract

The present application relates to a kind of energy storage systems, including mounting frame, mounting frame is equipped with receiving tube, receiving tube is formed with receiving warehouse, receiving warehouse is equipped with with the medium inlet being communicated with outside;And multiple battery modules, battery module is installed on mounting frame, and battery module is equipped with explosion-proof valve, explosion-proof valve is oppositely arranged with medium inlet.Working, when battery module occurs thermal runaway due to abnormal condition, high-temperature medium in battery module will break explosion-proof valve and erupt outward, since explosion-proof valve is oppositely arranged with medium inlet, so that high-temperature medium erupted from explosion-proof valve will be directly injected into medium inlet, and finally be received in the receiving warehouse of mounting frame, so it can prevent high-temperature medium from spreading everywhere, induce other normal working battery module to occur thermal runaway, i.e. realize the occurrence of thermal diffusion from the source of thermal runaway, ensure energy storage system safety, prevent safety accident, improve the working reliability and protection performance of energy storage system.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and in particular to an energy storage system. Background Technology

[0002] Currently, energy storage systems are widely used in various industries, and their safety performance has become a very important concern. The main working component of an energy storage system is the battery module. Under abnormal operating conditions, the battery module or a single battery cell within it is prone to thermal runaway, which can then induce thermal runaway in other normal battery modules or individual battery cells, causing heat diffusion and potentially leading to fires or even explosions in the energy storage system, resulting in significant property damage and personal injury.

[0003] The primary cause of thermal runaway in energy storage systems is the generation or ejection of large amounts of heat from failed battery modules or cells. This heat spreads and, through heating, induces thermal runaway in other healthy battery modules or cells. Current solutions involve installing fire suppression systems within the energy storage system to extinguish fires and explosions. However, this fire suppression mechanism is passive and delayed, failing to address the root cause of thermal runaway. It still results in significant thermal runaway, causing substantial damage to the energy storage system and potentially leading to serious safety incidents. Summary of the Invention

[0004] Therefore, it is necessary to provide an energy storage system that addresses the problem that existing technologies cannot block the source of thermal runaway, leading to severe heat diffusion that damages the energy storage system and causes safety accidents.

[0005] This application provides an energy storage system, which includes:

[0006] The mounting frame includes a receiving tube containing a receiving chamber, the receiving tube having a media inlet communicating with the outside; and

[0007] Multiple battery modules are mounted on the mounting bracket, and each battery module is equipped with an explosion-proof valve, which is positioned opposite to the medium inlet.

[0008] In the operation of the energy storage system described above, when a battery module experiences thermal runaway due to abnormal operating conditions, the high-temperature medium inside the battery module will break through the explosion-proof valve and spray outwards. Since the explosion-proof valve is set opposite to the medium inlet, the high-temperature medium sprayed from the explosion-proof valve will directly enter the medium inlet and eventually be contained in the containment chamber of the containment tube. This can prevent the high-temperature medium from spreading and inducing thermal runaway in other normally operating battery modules. In other words, it can block the thermal spread from the source of thermal runaway, ensure the safety of the energy storage system, prevent safety accidents, and improve the operational reliability and protection performance of the energy storage system.

[0009] The technical solution of this application will be further described below:

[0010] In one embodiment, the mounting bracket includes a plurality of shelf panels, each of which is disposed below the receiving tube and placed horizontally, and the battery module is placed on the shelf panel.

[0011] In one embodiment, the receiving tube is provided with storage shelves on both sides in the horizontal direction, and the receiving tube is provided with a partition plate inside, which divides the receiving compartment into a first receiving cavity and a second receiving cavity. The first receiving cavity and the second receiving cavity are independent of each other or interconnected. The first receiving cavity and the second receiving cavity are respectively arranged opposite to the explosion-proof valve of the corresponding battery module through the corresponding medium inlet.

[0012] In one embodiment, multiple media inlets are provided, and the multiple media inlets are arranged at intervals along the length of the receiving tube. Multiple battery modules are arranged in rows on the shelf, and the rows of battery modules correspond one-to-one with the media inlets.

[0013] In one embodiment, the mounting frame further includes a supporting longitudinal beam, the interior of which is formed a collection cavity, the end of the receiving tube is sealed to the supporting longitudinal beam, and a communication hole is provided at the connection between the end of the receiving tube and the supporting longitudinal beam to allow the receiving chamber to communicate with the collection cavity.

[0014] In one embodiment, the energy storage system further includes a one-way isolator installed at the medium inlet and configured to allow only high-temperature medium to flow from the explosion-proof valve into the containment chamber.

[0015] In one embodiment, the one-way isolation element includes a one-way breathable membrane, and the one-way breathable membrane is installed on the side of the inner tube wall of the receiving tube where the medium inlet is located.

[0016] In one embodiment, the energy storage system further includes a flow guide tube, one end of which is sealed to the explosion-proof valve, and the other end of which is sealed to the medium inlet.

[0017] In one embodiment, multiple supporting longitudinal beams are provided, and multiple receiving tubes and multiple storage shelves are installed between any two adjacent supporting longitudinal beams along the height direction, with each storage shelf corresponding to one of the receiving tubes.

[0018] In one embodiment, the energy storage system further includes a first series copper busbar, a second series copper busbar, and a third series copper busbar, wherein the first series copper busbar is electrically connected to two adjacent battery modules;

[0019] 5. The mounting bracket is equipped with at least two battery module sets, the battery module sets comprising multiple

[0020] The battery modules are connected in series, and the second series copper busbar electrically connects two adjacent sets of battery modules;

[0021] The third series copper busbar electrically connects two sets of battery modules in adjacent layers along the height direction.

[0022] In one embodiment, the mounting bracket further includes a pre-tightening end plate mounted on the supporting longitudinal beam, the pre-tightening end plate being used to adjust the pre-tightening force between the battery modules; and / or

[0023] The mounting frame also includes an electrical compartment and a liquid cooling compartment. The electrical compartment contains a high-voltage cabinet, and the liquid cooling compartment contains a liquid cooling unit. The high-voltage cabinet and the liquid cooling unit are electrically connected to the battery module, respectively. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an energy storage system according to an embodiment of this application;

[0027] Figure 2 for Figure 1Schematic diagram of the mounting bracket;

[0028] Figure 3 for Figure 1 A schematic diagram of the structure of the battery module;

[0029] Figure 4 This is an assembly structure diagram of the battery module, housing tube, and supporting longitudinal beam in an embodiment of this application;

[0030] Figure 5 for Figure 4 A front view structural diagram;

[0031] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure at point AA;

[0032] Figure 7 for Figure 6 A magnified view of the structure at point C in the middle;

[0033] Figure 8 for Figure 5 A top-view structural diagram;

[0034] Figure 9 for Figure 8 Schematic diagram of the cross-sectional structure at point BB;

[0035] Figure 10 for Figure 9 A magnified view of the structure at point D in the middle.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Energy storage system; 10. Mounting frame; 11. Container compartment; 111. First receiving cavity; 112. Second receiving cavity; 12. Medium inlet; 13. Receiving pipe; 131. Divider plate; 14. Shelf; 15. Supporting longitudinal beam; 151. Collection cavity; 16. Pre-tightening end plate; 17. Electrical compartment; 18. Liquid cooling compartment; 19. Flow guide tube; 20. Battery module; 21. Explosion-proof valve; 22. Liquid cooling plate; 23. Battery cell; 30. Unidirectional isolation component; 40. First series copper busbar; 50. Second series copper busbar; 60. Third series copper busbar; 70. High voltage cabinet; 80. Liquid cooling unit. Detailed Implementation

[0038] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] like Figure 1 The image shows an energy storage system 100 according to an embodiment of this application, used in applications where it supplies energy to electrical equipment. Depending on actual needs, the energy storage system 100 can be either fixed or mobile.

[0040] Please continue reading Figure 2 and Figure 3 For example, the energy storage system 100 includes a mounting frame 10 and a battery module 20. The mounting frame 10 includes a top plate, a bottom plate, a supporting longitudinal beam 15, a receiving tube 13, and a shelf 14. The top plate and the bottom plate are longitudinally spaced opposite each other, and the supporting longitudinal beam 15 is installed between the top plate and the bottom plate, so that the mounting frame 10 forms an open frame structure, which facilitates the installation and removal of the battery module 20.

[0041] The receiving tube 13 is arranged laterally and connected between two adjacent supporting longitudinal beams 15. The shelf 14 is installed on the supporting longitudinal beams 15. The receiving tube 13 is provided with a receiving compartment 11, and the receiving compartment 11 is provided with a medium inlet 12 communicating with the outside; multiple battery modules 20 are installed on the mounting frame 10, and the battery modules 20 are provided with explosion-proof valves 21, which are arranged opposite to the medium inlet 12.

[0042] The battery module 20 consists of a liquid cooling plate 22 and at least two battery cells 23 mounted on the liquid cooling plate 22.

[0043] In summary, implementing the technical solution of this embodiment will have the following beneficial effects: When the energy storage system 100 of the above solution is in operation, when the battery module 20 experiences thermal runaway due to abnormal operating conditions, the high-temperature medium inside the battery module 20 will break through the explosion-proof valve 21 and spray outward. Since the explosion-proof valve 21 is set opposite to the medium inlet 12, the high-temperature medium sprayed from the explosion-proof valve 21 will directly spray into the medium inlet 12 and finally be contained in the containment chamber 11 of the containment tube 13. In this way, the high-temperature medium can be prevented from spreading everywhere and inducing other normally operating battery modules 20 to experience thermal runaway. That is, the thermal runaway is blocked from the source, ensuring the safety of the energy storage system 100, preventing safety accidents, and improving the working reliability and protection performance of the energy storage system 100.

[0044] It is understandable that the aforementioned receiving tube 13 is a conventional round tube, square tube, or other tubing, and the receiving chamber 11 is the cavity of the tubing. This makes the formation of the receiving chamber 11 simple, requiring no additional processing and shaping, thus reducing costs.

[0045] Furthermore, a containment bag can be connected to the outside of the containment tube 13, so that after the high-temperature medium ejected from the explosion-proof valve 21 flows into the containment chamber 11, it can further flow into the containment bag, thereby increasing the amount of high-temperature medium that can be contained while avoiding thermal diffusion of the high-temperature medium.

[0046] It should be noted that the aforementioned high-temperature media include, but are not limited to, liquids, gases, or gas-liquid mixtures.

[0047] Please continue reading Figures 4 to 10 In some embodiments, there are multiple shelf panels 14, each positioned below the receiving tube 13 and placed horizontally, with the battery module 20 placed on the shelf panel 14. Therefore, the shelf panel 14 can stably support the battery module 20, ensuring that the explosion-proof valve 21 of the battery module 20 is accurately and continuously aligned with the medium inlet 12 of the receiving tube 13. This ensures that in the event of thermal runaway of the battery module 20, all the high-temperature medium ejected from the explosion-proof valve 21 can enter the receiving chamber 11.

[0048] In practical applications, the volume of the containment chamber 11 is limited, which also means that the amount of high-temperature medium it can contain is limited. Once the containment chamber 11 is full of high-temperature medium, the high-temperature medium will overflow from the medium inlet 12, still posing a risk of heat diffusion. To address this, in some embodiments, the energy storage system 100 further includes a one-way isolator 30. The one-way isolator 30 is installed at the medium inlet 12 and is configured to allow the high-temperature medium to flow only from the explosion-proof valve 21 into the containment chamber 11. That is, the one-way isolator 30 can prevent the high-temperature medium in the containment chamber 11 from overflowing from the medium inlet 12, avoiding the aforementioned problem.

[0049] For example, the one-way isolation element 30 can be any one of a one-way valve, a one-way breathable membrane, etc.

[0050] Preferably, in this embodiment, the one-way isolation member 30 includes a one-way breathable membrane, and the one-way breathable membrane is installed on the inner wall of the medium inlet 12 located in the receiving tube 13. This can avoid obstructing the high-temperature medium just ejected from the explosion-proof valve 21, and the one-way breathable membrane can achieve the effect of hidden installation, avoiding accidental scratches and punctures that would cause it to lose its one-way flow capability.

[0051] Alternatively, please continue reading Figure 7 As an alternative to the above embodiments, in some embodiments, the energy storage system 100 further includes a flow guide tube 19. One end of the flow guide tube 19 is sealed to the explosion-proof valve 21, and the other end of the flow guide tube 19 is sealed to the medium inlet 12. The flow guide tube 19 can guide the high-temperature medium ejected from the explosion-proof valve 21 to the medium inlet 12. In addition, the flow guide tube 19 is sealed to both the explosion-proof valve 21 and the medium inlet 12, so even if the high-temperature medium in the containment chamber 11 overflows in the reverse direction from the medium inlet 12, it cannot diffuse to the adjacent normal battery module 20, thus achieving the purpose of blocking heat diffusion.

[0052] Furthermore, based on any of the above embodiments, storage shelves 14 are provided on both opposite sides of the horizontal direction of the receiving tube 13. Therefore, battery modules 20 can be installed simultaneously on both opposite sides of the horizontal direction of the receiving tube 13, integrating more battery modules 20 and improving the energy storage capacity of the energy storage system 100.

[0053] Please continue reading Figure 6 and Figure 7 The receiving tube 13 has a partition plate 131 inside, which divides the receiving chamber 11 into a first receiving cavity 111 and a second receiving cavity 112. The first receiving cavity 111 and the second receiving cavity 112 are independent of each other or connected to each other. For example, in this embodiment, the first receiving cavity 111 is completely isolated from the second receiving cavity 112 by the partition plate 131.

[0054] The first receiving cavity 111 and the second receiving cavity 112 are respectively arranged opposite to the explosion-proof valve 21 of the corresponding battery module 20 through the corresponding medium inlet 12. This allows the first receiving cavity 111 and the second receiving cavity 112 to specifically contain the high-temperature medium ejected from the explosion-proof valve 21 of the corresponding battery module 20.

[0055] Furthermore, multiple medium inlets 12 are provided, and these multiple medium inlets 12 are arranged at intervals along the length of the receiving tube 13. Multiple battery modules 20 are arranged in rows on the shelf 14, and the row of battery modules 20 corresponds one-to-one with the medium inlets 12. In this way, more battery modules 20 can be installed on a single shelf 14, which helps to further improve the energy storage capacity of the energy storage system 100. At this time, a single receiving tube 13 can simultaneously collect the high-temperature medium ejected from the explosion-proof valves 21 of multiple battery modules 20, reducing the number of receiving tubes 13 used, simplifying the structure of the mounting bracket 10 and reducing costs.

[0056] Please continue reading Figure 9 and Figure 10 However, it should be noted that in extreme cases, two or more battery modules 20 may experience thermal runaway simultaneously, resulting in an excessive amount of high-temperature medium being ejected into the containment chamber 11 of a single containment tube 13, exceeding the storage limit of the containment chamber 11. In this case, the high-temperature medium may still overflow from the medium inlet 12, causing a safety hazard of thermal diffusion. To address this, in some embodiments, a collection cavity 151 is formed inside the supporting longitudinal beam 15, the end of the containment tube 13 is sealed to the supporting longitudinal beam 15, and a communication hole is provided at the connection between the end of the containment tube 13 and the supporting longitudinal beam 15 to allow communication between the containment chamber 11 and the collection cavity 151.

[0057] The containment chamber 11 and the collection cavity 151 are connected in length, further increasing the flow rate of the high-temperature medium, thus effectively addressing the problem of simultaneous thermal runaway of multiple battery modules 20. Furthermore, the collection cavity 151 extends the flow path of the high-temperature medium, causing its temperature to gradually decrease as it flows through the containment chamber 11 and the collection cavity 151, preventing it from heating the air inside the energy storage system 100 and thus inducing heat diffusion.

[0058] Based on any of the above embodiments, multiple supporting longitudinal beams 15 are provided, and multiple receiving tubes 13 and multiple storage shelves 14 are installed between any two adjacent supporting longitudinal beams 15, stacked along the height direction, with each storage shelf 14 corresponding to a receiving tube 13. In this way, the multiple storage shelves 14 in the height direction make full use of the height space of the mounting frame 10, and multiple battery modules 20 can be placed simultaneously, thereby improving the energy storage density and capacity of the energy storage system 100.

[0059] Furthermore, the energy storage system 100 also includes a first series copper busbar 40, a second series copper busbar 50, and a third series copper busbar 60. The first series copper busbar 40 electrically connects two adjacent battery modules 20. At least two sets of battery modules 20 are mounted on the mounting frame 10, and each set of battery modules 20 includes multiple battery modules 20 connected in series. The second series copper busbar 50 electrically connects two adjacent sets of battery modules 20. The third series copper busbar 60 electrically connects two sets of battery modules 20 on two adjacent layers in the height direction. This completes the series and parallel connection of each battery module 20 in the energy storage system 100.

[0060] Please continue reading Figure 1 and Figure 2 In some embodiments, the mounting bracket 10 further includes a pre-tightening end plate 16, which is mounted on the supporting longitudinal beam 15. The pre-tightening end plate 16 is used to adjust the pre-tightening force between the battery modules 20. During normal installation, a certain gap is reserved between two adjacent battery modules 20. When the battery modules 20 undergo thermal expansion during operation, their volume gradually increases, the gap between the battery modules 20 disappears, and a gradually increasing compressive force is formed between the battery modules 20. At this time, by adjusting the pre-tightening end plate 16, the pre-tightening force between the battery modules 20 can be adjusted, thereby avoiding crushing damage.

[0061] For example, the pre-tightening end plate 16 is of adjustable thickness. By reducing the thickness of the pre-tightening end plate 16, more installation space can be provided so that the battery modules 20 can still maintain reasonable contact force after thermal expansion.

[0062] In addition, the mounting frame 10 is also equipped with an electrical compartment 17 and a liquid cooling compartment 18. The electrical compartment 17 houses a high-voltage cabinet 70, and the liquid cooling compartment 18 houses a liquid cooling unit 80. The high-voltage cabinet 70 and the liquid cooling unit 80 are electrically connected to the battery module 20. During operation, the high-voltage cabinet 70 can set parameters such as output current and voltage, and the liquid cooling unit 80 can cool the battery module 20.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0065] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0069] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. An energy storage system, characterized in that, include: The mounting frame includes a receiving tube, a receiving chamber is formed inside the receiving tube, and the receiving chamber is provided with a medium inlet communicating with the outside. as well as Multiple battery modules are mounted on the mounting bracket, and each battery module is equipped with an explosion-proof valve, which is positioned opposite to the medium inlet. The mounting bracket includes multiple shelves, each shelf being positioned below the receiving tube and placed horizontally, with the battery module placed on the shelf. The mounting frame also includes a supporting longitudinal beam, the interior of which forms a collection cavity. The end of the receiving tube is sealed to the supporting longitudinal beam, and a communication hole is provided at the connection between the end of the receiving tube and the supporting longitudinal beam to allow the receiving chamber to communicate with the collection cavity. The medium inlet is provided in multiple ways, and the multiple medium inlets are arranged at intervals along the length of the receiving tube. The multiple battery modules are arranged in rows on the shelf, and the row of battery modules corresponds one-to-one with the medium inlet. Multiple supporting longitudinal beams are provided, and multiple receiving tubes and multiple storage shelves are installed between any two adjacent supporting longitudinal beams along the height direction, with each storage shelf corresponding to one of the receiving tubes.

2. The energy storage system according to claim 1, characterized in that, The receiving tube is provided with storage shelves on both sides in the horizontal direction. The receiving tube is provided with a partition plate inside, which divides the receiving compartment into a first receiving cavity and a second receiving cavity. The first receiving cavity and the second receiving cavity are independent of each other or connected to each other. The first receiving cavity and the second receiving cavity are respectively arranged opposite to the explosion-proof valve of the corresponding battery module through the corresponding medium inlet.

3. The energy storage system according to any one of claims 1 to 2, characterized in that, The energy storage system also includes a one-way isolator installed at the medium inlet and configured to allow only high-temperature medium to flow from the explosion-proof valve into the containment chamber.

4. The energy storage system according to claim 3, characterized in that, The one-way isolation element includes a one-way breathable membrane, and the one-way breathable membrane is installed on the inner wall of the receiving tube where the medium inlet is located.

5. The energy storage system according to any one of claims 1 to 2, characterized in that, The energy storage system also includes a flow guide tube, one end of which is sealed to the explosion-proof valve, and the other end of which is sealed to the medium inlet.

6. The energy storage system according to claim 1, characterized in that, The receiving tube is a round tube or a square tube.

7. The energy storage system according to claim 1, characterized in that, The external connection of the containment tube is a containment bag. After the high-temperature medium sprayed from the explosion-proof valve flows into the containment chamber, it further flows into the containment bag.

8. The energy storage system according to claim 1, characterized in that, The energy storage system also includes a first series copper busbar, a second series copper busbar and a third series copper busbar, wherein the first series copper busbar is electrically connected to two adjacent battery modules; The mounting bracket is equipped with at least two battery module sets, each battery module set comprising multiple battery modules connected in series, and the second series copper busbar electrically connects two adjacent battery module sets. The third series copper busbar electrically connects two sets of battery modules in adjacent layers along the height direction.

9. The energy storage system according to claim 1, characterized in that, The mounting bracket also includes a pre-tightening end plate, which is mounted on the supporting longitudinal beam and is used to adjust the pre-tightening force between the battery modules.

10. The energy storage system according to claim 1, characterized in that, The mounting frame also includes an electrical compartment and a liquid cooling compartment. The electrical compartment contains a high-voltage cabinet, and the liquid cooling compartment contains a liquid cooling unit. The high-voltage cabinet and the liquid cooling unit are electrically connected to the battery module, respectively.

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