Immersed energy storage device

Abstract

The utility model provides an immersed energy storage device, relates to the technical field of battery cooling, and aims to solve the problem of poor temperature uniformity caused by single-side cooling of a liquid cooling plate at the present stage to a certain extent. The utility model provides an immersed energy storage device. The immersed energy storage device comprises a shell, a heat dissipation piece, a liquid return piece and a plurality of battery cells, the heat dissipation piece, the battery cells and the liquid return piece are all arranged in the shell, the heat dissipation piece comprises a main body part and a tooth part, the heat dissipation piece is arranged between the adjacent battery cells, and the main body part is located between the adjacent battery cells; a first liquid passing gap is formed between one end, in the vertical direction, of each battery cell and the top wall of the shell, the tooth part is located in the first liquid passing gap, and a second liquid passing gap is formed between the battery cell located at the tail and the shell; the liquid return part is arranged between the battery cell and the shell and located at the bottom of the shell, and a liquid return opening of the liquid return part is communicated with the second liquid passing gap.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cooling, in particular to an immersion type energy storage device. Background Art

[0002] In the current energy storage system, the heat dissipation solution is mainly air cooling. The air cooling heat dissipation solution uses air as the heat dissipation medium, which has problems such as low heat exchange efficiency, high noise, and large footprint. Therefore, the liquid cooling plate heat dissipation solution is developing rapidly with its higher heat dissipation efficiency and lower energy consumption advantages.

[0003] However, there are still some problems with the liquid cooling plate heat dissipation solution for the system thermal performance. For example, the liquid cooling plate can only cool a single side of the battery cell, resulting in poor temperature uniformity. In addition, when using a liquid cooling plate, the path from the coolant to the liquid cooling plate and then to the battery cell increases the heat dissipation thermal resistance, affecting the cooling effect.

[0004] Therefore, there is an urgent need to provide an immersion energy storage device to solve the problems existing in the prior art to a certain extent. Utility Model Content

[0005] The utility model aims to provide an immersion energy storage device, so as to solve the problem of poor temperature uniformity caused by the current single-sided cooling of a liquid cooling plate.

[0006] The utility model provides an immersion energy storage device, comprising a shell, a heat sink, a liquid return member and a plurality of battery cells; the heat sink, the battery cells and the liquid return member are all arranged in the shell, the heat sink comprises a main body and a tooth portion, a heat sink is arranged between adjacent battery cells, and the main body portion is located between adjacent battery cells; a first liquid-transmitting gap is formed between one end of the battery cell in the vertical direction and the top wall of the shell, the tooth portion is located in the first liquid-transmitting gap, and a second liquid-transmitting gap is formed between the battery cell located at the end and the shell; the liquid return member is arranged between the battery cell and the shell, and is located at the bottom of the shell, and the liquid return port of the liquid return member is communicated with the second liquid-transmitting gap.

[0007] Among them, a liquid inlet and a reflux port are formed on the shell, and the liquid inlet is connected to the first liquid passing gap; a liquid outlet is formed on the liquid return member, and the liquid outlet is formed at one end of the liquid return member away from the second liquid passing gap, and the liquid outlet is connected to the reflux port.

[0008] Specifically, the liquid return member has a U-shaped frame structure, including two mutually parallel diversion sections and a collecting section with two ends respectively communicating with the diversion sections; the liquid return port is formed at one end of the diversion section away from the collecting section, the liquid outlet is formed on the collecting section, and the interval between the two diversion sections is adapted to the length of the battery cell, so that the side walls at both ends of the battery cell in the length direction are attached to the inner walls of the diversion sections.

[0009] Among them, the immersion energy storage device provided by the present invention further includes a flow channel frame. Avoidance portions are formed at both ends of the tooth portion in the length direction of the battery cell, and two side edges of the flow channel frame extending along the length direction of the housing are respectively embedded into the avoidance portions at both ends of the tooth portion; the dimension of the flow channel frame in the vertical direction is not less than the dimension of the tooth portion in the vertical direction.

[0010] Specifically, the immersion energy storage device provided by the present invention further includes a liquid return pipe. One end of the liquid return pipe is communicated with the liquid outlet of the collecting section, and the other end extends out of the housing through the return port.

[0011] Furthermore, the immersion energy storage device provided by the present invention further includes a liquid inlet pipe. The flow channel frame is formed with a positioning port. One end of the liquid inlet pipe enters the housing through the liquid inlet of the housing and is connected to the positioning port. The liquid outlet end of the liquid inlet pipe is communicated with the first liquid passing gap; the other end of the liquid inlet pipe is located outside the housing.

[0012] Even further, the immersion energy storage device provided by the present invention further includes a buffer member. Two heat dissipation members are provided between two adjacent battery cells, and the buffer member is arranged between the two heat dissipation members.

[0013] Specifically, the heat dissipation member is made of a metal material. The tooth portion includes a plurality of rack bars arranged at intervals along the length direction of the main body portion. The plurality of rack bars all extend in the vertical direction and have the same dimension in the vertical direction. The thickness of the tooth portion is the same as the thickness of the main body portion.

[0014] Furthermore, the housing includes a housing main body and a cover plate. The housing main body is formed with an open mouth, and the cover plate is sealed at the open mouth and is hermetically connected to the housing main body.

[0015] Even further, the immersion energy storage device provided by the present invention further includes a connection row for connecting a plurality of the battery cells.

[0016] Compared with the prior art, the immersion energy storage device provided by the present invention has the following advantages:

[0017] The utility model provides an immersion energy storage device, comprising a shell, a heat sink, a liquid return member and a plurality of battery cells; the heat sink, the battery cells and the liquid return member are all arranged in the shell, the heat sink comprises a main body and a tooth portion, heat sinks are arranged between adjacent battery cells, and the main body portion is located between adjacent battery cells; a first liquid-transmitting gap is formed between one end of the battery cell in the vertical direction and the top wall of the shell, the tooth portion is located in the first liquid-transmitting gap, and a second liquid-transmitting gap is formed between the battery cell at the end and the shell; the liquid return member is arranged between the battery cell and the shell, and is located at the bottom of the shell, and the liquid return port of the liquid return member is connected to the second liquid-transmitting gap.

[0018] From this analysis, it can be known that the shell can provide an installation foundation for the battery cell, the heat sink and the liquid return part, and the heat sink is set between two adjacent battery cells, and the heat sink in this application includes a main body and a tooth part. By making the main body be located between two adjacent battery cells and fit with the battery cells, the heat generated by the battery cells can be absorbed and transferred to the tooth part. Since a first liquid gap is formed between the battery cell and the top of the shell in this application, and the tooth part is located in the first liquid gap, the coolant entering the shell can flow in the first liquid gap to achieve heat dissipation of the tooth part, thereby absorbing the heat generated by the battery cell absorbed by the main body.

[0019] Accordingly, since a second liquid-flowing gap is formed between the battery cell at the end and the shell in the present application, and the first liquid-flowing gap is connected to the second liquid-flowing gap, the cooling liquid can flow from the first liquid-flowing gap to the second liquid-flowing gap. Furthermore, since a liquid return piece is also provided at the bottom of the shell, and the liquid return port of the liquid return piece is connected to the second liquid-flowing gap, the cooling liquid after absorbing heat can be guided out of the shell through the liquid return piece, and after cooling, it can enter the first liquid-flowing gap for heat exchange, thereby realizing cyclic cooling of the battery cell and improving the uniformity of cooling of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a heat sink in an immersion energy storage device provided in an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the exploded structure of an immersion energy storage device provided in an embodiment of the utility model;

[0023] Figure 3A schematic diagram of the internal structure of an immersion energy storage device provided in an embodiment of the utility model;

[0024] Figure 4 A schematic diagram of the position of a liquid return port in an immersion energy storage device provided in an embodiment of the utility model;

[0025] Figure 5 A schematic diagram of the overall structure of an immersion energy storage device provided in an embodiment of the utility model.

[0026] In the figure: 1-heat sink; 101-main body; 102-tooth; 103-avoidance; 2-battery cell; 3-liquid return member; 301-liquid return port; 4-shell; 401-shell body; 4011-liquid inlet; 4012-reflux port; 4013-first liquid gap; 4014-second liquid gap; 402-cover; 5-flow channel frame; 6-liquid return pipe; 7-liquid inlet pipe; 8-connecting row. DETAILED DESCRIPTION

[0027] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0028] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0032] For ease of description, spatial relative terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the drawings. Such spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings.

[0033] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0034] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0035] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection required by the present application.

[0036] like Figure 1-Figure 5As shown, the utility model provides an immersion energy storage device, including a shell 4, a heat sink 1, a liquid return member 3 and a plurality of battery cells 2; the heat sink 1, the battery cells 2 and the liquid return member 3 are all arranged in the shell 4, the heat sink 1 includes a main body 101 and a tooth portion 102, the heat sink 1 is arranged between adjacent battery cells 2, and the main body 101 is located between adjacent battery cells 2; a first liquid-transmitting gap 4013 is formed between one end of the battery cell 2 in the vertical direction and the top wall of the shell 4, the tooth portion 102 is located in the first liquid-transmitting gap 4013, and a second liquid-transmitting gap 4014 is formed between the battery cell 2 located at the end and the shell 4; the liquid return member 3 is arranged between the battery cell 2 and the shell 4, and is located at the bottom of the shell 4, and the liquid return port 301 of the liquid return member 3 is connected to the second liquid-transmitting gap 4014.

[0037] Compared with the prior art, the submerged energy storage device provided by the utility model has the following advantages:

[0038] The submerged energy storage device provided by the utility model can provide an installation foundation for the battery cell 2, the heat sink 1 and the liquid return member 3 through the shell 4, and the heat sink 1 is arranged between two adjacent battery cells 2, and the heat sink 1 in the present application includes a main body 101 and a tooth 102. By making the main body 101 located between the two adjacent battery cells 2 and in contact with the battery cell 2, the heat generated by the battery cell 2 can be absorbed and transferred to the tooth 102. Since a first liquid gap 4013 is formed between the battery cell 2 and the top of the shell 4 in the present application, and the tooth 102 is located in the first liquid gap 4013, the cooling liquid entering the shell 4 can flow in the first liquid gap 4013 to achieve heat dissipation of the tooth 102, thereby absorbing the heat generated by the battery cell 2 absorbed by the main body 101.

[0039] Accordingly, since the second liquid-passing gap 4014 is formed between the battery cell 2 at the end and the housing 4 in the present application, and the first liquid-passing gap 4013 is connected to the second liquid-passing gap 4014, the cooling liquid can flow from the first liquid-passing gap 4013 to the second liquid-passing gap 4014. Furthermore, since the bottom of the housing 4 is also provided with a liquid return member 3, and the liquid return port 301 of the liquid return member 3 is connected to the second liquid-passing gap 4014, the cooling liquid after absorbing heat can be guided out of the housing 4 through the liquid return member 3, and after cooling, it can enter the first liquid-passing gap 4013 for heat exchange, thereby realizing cyclic cooling of the battery cell 2 and improving the uniformity of cooling the battery cell 2.

[0040] It is understandable that if Figure 2 As shown, a liquid inlet 4011 and a reflux port 4012 are formed on the shell 4 in the present application, and the liquid inlet 4011 is connected to the first liquid passing gap 4013; a liquid outlet is formed on the liquid return member 3, and the liquid outlet is formed at one end of the liquid return member 3 away from the second liquid passing gap 4014, and the liquid outlet is connected to the reflux port 4012.

[0041] In this embodiment, the liquid inlet 4011 is directly arranged corresponding to the first liquid passing gap 4013, so that the coolant can enter the first liquid passing gap 4013. Since an outlet is formed at one end of the liquid return member 3 away from the second liquid passing gap 4014, and the outlet is communicated with the return port 4012, the coolant entering the liquid return member 3 from the second liquid passing gap 4014 can be discharged from the housing 4 through the return port 4012 of the housing 4 after reaching the outlet, completing the circulation of the coolant in the housing 4, and further achieving the purpose of taking out the heat of the battery cell 2.

[0042] It should be supplemented and explained here that the liquid return member 3 in the present application is of a hollow structure, and the second liquid passing gap 4014 is formed inside one end of the housing 4 away from the liquid inlet 4011 and the return port 4012, that is, a plurality of battery cells 2 are arranged in sequence along the length direction of the housing 4, and the battery cells 2 close to the liquid inlet 4011 and the return port 4012 are the head battery cells 2. Correspondingly, the battery cells 2 away from the liquid inlet 4011 and the return port 4012 are the tail battery cells 2. By arranging a gap between the tail battery cells 2 and the housing 4, that is, the total dimension of the plurality of battery cells 2 in the length direction of the housing 4 after being arranged is smaller than the dimension of the inside of the housing 4 in the length direction, the above-mentioned second liquid passing gap 4014 can be formed.

[0043] After the coolant enters the first liquid passing gap 4013, it can flow along the length direction of the housing 4 towards the second liquid passing gap 4014, flow into the liquid return member 3 from the second liquid passing gap 4014, and finally the coolant flows out through the outlet of the liquid return member 3 and the return port 4012 of the housing 4.

[0044] Preferably, as Figure 2 shown, the liquid return member 3 in the present application has a U-shaped frame structure, including two parallel diversion sections and a collection section with both ends respectively communicated with the diversion sections; the liquid return port 301 is formed at one end of the diversion section away from the collection section, the outlet is formed on the collection section, and the interval between the two diversion sections is adapted to the length of the battery cell 2, so that the side walls at both ends of the battery cell 2 in the length direction are attached to the inner walls of the diversion sections.

[0045] Since the interval between the two parallel collection sections in the present application is adapted to the length of the battery cell 2, therefore, it can play a role in limiting the battery cell 2 in the length direction, so that a plurality of battery cells 2 can be stably held in the housing 4 after being arranged, avoiding crosstalk.

[0046] The length direction of the above-mentioned battery cell 2 means that the length direction of a single battery cell 2 is the width direction of the housing 4, and the length direction of the housing 4 means the thickness direction of a single battery cell 2.

[0047] Optionally, as Figure 2As shown, the submerged energy storage device provided by the utility model also includes a flow channel frame 5, and avoidance portions 103 are formed at both ends of the tooth portion 102 in the length direction of the battery core 2, and two side edges of the flow channel frame 5 extending along the length direction of the shell 4 are respectively embedded in the avoidance portions 103 at both ends of the tooth portion 102; the size of the flow channel frame 5 in the vertical direction is not less than the size of the tooth portion 102 in the vertical direction.

[0048] Since the height dimension of the battery cell 2 in the present application is the same as the height dimension of the main body 101, the height dimension of the battery cell 2 is smaller than the height dimension of the overall heat sink 1 with the tooth portion 102 added. Therefore, by providing the flow channel frame 5, the battery cell 2 can be stably limited to avoid the problem of the battery cell 2 moving up and down in the vertical direction during use, and ensure that the sides of the multiple battery cells 2 facing the top of the shell 4 can be located on the same plane, thereby ensuring the flatness of the first liquid gap 4013, thereby reducing the flow resistance to the coolant and improving the flow performance and heat dissipation performance.

[0049] Alternatively, if Figure 2 As shown, the submerged energy storage device provided by the utility model further includes a liquid return pipe 6, one end of which is connected to the liquid outlet of the collecting section, and the other end of which is extended out of the shell 4 through the reflux port 4012.

[0050] By connecting the return pipe 6 to the return port 4012 on the shell 4, stable output of the coolant can be achieved, and the sealing difficulty can be reduced to a certain extent, thereby ensuring the stability of the overall structure.

[0051] Accordingly, if Figure 2 As shown, the submerged energy storage device provided by the utility model also includes a liquid inlet pipe 7, the flow channel frame 5 is formed with a positioning port, one end of the liquid inlet pipe 7 enters the shell 4 through the liquid inlet port 4011 of the shell 4 and is connected to the positioning port, and the liquid outlet end of the liquid inlet pipe 7 is connected to the first liquid gap 4013; the other end of the liquid inlet pipe 7 is located outside the shell 4.

[0052] By providing the liquid inlet pipe 7 and the liquid return pipe 6, the coolant flowing out of the shell 4 can be further connected to the external heat exchange system to achieve heat exchange of the high-temperature coolant after absorbing heat, and after cooling, the coolant can flow into the shell 4 again for circulation.

[0053] Optionally, the submerged energy storage device provided by the present invention further includes a buffer, two heat sinks 1 are provided between two adjacent battery cells 2 , and the buffer is disposed between the two heat sinks 1 .

[0054] During the use of the energy storage module, due to different working environments and the charging and discharging of the battery cells 2, certain expansion and contraction will occur. Therefore, in this method, two heat sinks 1 are provided between two adjacent battery cells 2, and a buffer is added between the main body 101 of the heat sink 1. When the battery cell 2 expands or contracts, the deformation of the battery cell 2 can be absorbed by the contraction and expansion of the buffer.

[0055] The buffer member in the present application may be foam, and the buffer member mainly plays a role in buffering the expansion and deformation of the battery cell 2 to ensure the operational stability of the overall energy storage module.

[0056] It is understandable that the heat sink 1 in the present application is made of metal material, so that it can quickly absorb the heat generated by the battery cell 2 and transfer it to the tooth portion 102. The tooth portion 102 includes a plurality of racks arranged at intervals along the length direction of the main body 101, and the plurality of racks extend in the vertical direction and have the same size in the vertical direction. The thickness of the tooth portion 102 is the same as that of the main body 101.

[0057] Alternatively, if Figure 2 As shown, the shell 4 in the present application includes a shell body 401 and a cover plate 402 . The shell body 401 is formed with an opening, and the cover plate 402 covers the opening and is sealed to the shell body 401 .

[0058] Alternatively, if Figure 2 As shown, the submerged energy storage device provided by the utility model further includes a connecting row 8, and the connecting row 8 is used to connect multiple battery cells 2.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An immersion energy storage device, characterized in that: It includes a housing, a heat dissipation component, a liquid return component, and a plurality of battery cells; The heat dissipation component, the battery cells, and the liquid return component are all arranged inside the housing. The heat dissipation component includes a main body part and tooth parts. Heat dissipation components are provided between adjacent battery cells, and the main body part is located between adjacent battery cells; A first liquid passing gap is formed between one end of the battery cell in the vertical direction and the top wall of the housing. The tooth parts are located in the first liquid passing gap, and a second liquid passing gap is formed between the last battery cell and the housing; The liquid return component is arranged between the battery cell and the housing and is located at the bottom of the housing. The liquid return port of the liquid return component is communicated with the second liquid passing gap.

2. The submerged energy storage device according to claim 1, characterized in that: A liquid inlet and a liquid return port are formed on the housing. The liquid inlet is communicated with the first liquid passing gap; A liquid outlet is formed on the liquid return component. The liquid outlet is formed at one end of the liquid return component away from the second liquid passing gap, and the liquid outlet is communicated with the liquid return port.

3. The submerged energy storage device according to claim 2, characterized in that: The liquid return component has a U-shaped frame structure and includes two parallel diversion sections and a collecting section with two ends respectively communicated with the diversion sections; The liquid return port is formed at one end of the diversion section away from the collecting section. The liquid outlet is formed on the collecting section. The interval between the two diversion sections is adapted to the length of the battery cell, so that the side walls at both ends of the battery cell in the length direction are attached to the inner walls of the diversion sections.

4. The submerged energy storage device according to claim 1, characterized in that: It further includes a flow channel frame. Avoidance parts are formed at both ends of the tooth parts in the length direction of the battery cell. Two side edges of the flow channel frame extending along the length direction of the housing are respectively embedded in the avoidance parts at both ends of the tooth parts; The size of the flow channel frame in the vertical direction is not less than the size of the tooth parts in the vertical direction.

5. The submerged energy storage device according to claim 3, characterized in that: It further includes a liquid return pipe. One end of the liquid return pipe is communicated with the liquid outlet of the collecting section, and the other end extends out of the housing through the liquid return port.

6. The submerged energy storage device according to claim 4, characterized in that: It further includes a liquid inlet pipe. The flow channel frame is formed with a positioning port. One end of the liquid inlet pipe enters the housing through the liquid inlet of the housing and is connected to the positioning port. The liquid outlet end of the liquid inlet pipe is communicated with the first liquid passing gap; The other end of the liquid inlet pipe is located outside the housing.

7. The submerged energy storage device according to claim 1, characterized in that: It further includes a buffer component. Two heat dissipation components are provided between two adjacent battery cells, and the buffer component is arranged between the two heat dissipation components.

8. The submerged energy storage device according to claim 1, characterized in that: The heat dissipation component is made of a metal material. The tooth parts include a plurality of racks arranged at intervals along the length direction of the main body part. The plurality of racks all extend in the vertical direction and have the same size in the vertical direction. The thickness of the tooth parts is the same as the thickness of the main body part.

9. The submerged energy storage device according to claim 1, characterized in that: The housing includes a housing main body and a cover plate. The housing main body is formed with an opening, and the cover plate covers the opening and is hermetically connected to the housing main body.

10. The submerged energy storage device according to claim 1, characterized in that: It further includes a connection row for connecting a plurality of the battery cells.

Images