Shell of energy storage device and energy storage device

Abstract

The utility model provides a shell of an energy storage device and the energy storage device. The shell of the energy storage device and the energy storage device comprise two side plates, an upper cover plate, a bottom plate and two end plates. The upper cover plate and the bottom plate are oppositely arranged in the first direction, the two side plates are oppositely arranged in the second direction, and the two end plates are oppositely arranged in the third direction. The side plate comprises a main plate and two buckle plates; the two buckle plates are vertically arranged on the two sides of the main plate respectively, one side of each buckle plate is fixedly connected with the main plate, and the other side of each buckle plate is provided with a plurality of claw buckles. The upper edges of the two main plates are fixedly connected with the corresponding length edges of the upper cover plate, the lower edges of the two main plates are fixedly connected with the corresponding length edges of the bottom plate, and each buckle plate is connected with the corresponding end plate in a clamped mode through a plurality of claw buckles. An accommodating space is formed in the two side plates, the upper cover plate, the bottom plate and the two end plates, and is used for placing a battery cell module. According to the invention, the waste of the cell mounting space in the energy storage device is reduced, and the problems of difficult operation and high cost of the sealing cover plate of the traditional Pack device are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage power supply, in particular to a shell of an energy storage device and the energy storage device. BACKGROUND

[0002] The MTB is the abbreviation of Module to Bracket, which means that the battery module is directly integrated into the battery cluster frame of the energy storage system.

[0003] The traditional battery Pack device is composed of a cell module, the module is placed in the Pack, and the Pack is sealed to protect the cell module. The sealing cover plate of the battery Pack device is usually distributed around the module with multiple bolts to fix the sealing module with the module bottom plate, that is, the sealing of the energy storage device needs to be sealed by the upper cover and the lower box body.

[0004] The sealing cover plate has a large upper cover area and a high energy storage module height, which has the problems of high manufacturing cost and complex process. The bolt fixing edge occupies the cell installation space, resulting in low energy density of the above-mentioned group Pack energy storage device and waste of the installation space in the energy storage device. Content of the utility model

[0005] The present application provides a shell of an energy storage device and an energy storage device to solve the problems of large upper cover area of the sealing cover plate of the traditional battery Pack device and high energy storage module height.

[0006] In a first aspect, the present application provides a shell of an energy storage device, comprising two side plates (1), an upper cover plate (2), a bottom plate (3) and two end plates (4);

[0007] The upper cover plate (2) and the bottom plate (3) are arranged opposite along a first direction, the two side plates (1) are arranged opposite along a second direction, and the two end plates (4) are arranged opposite along a third direction;

[0008] The side plate (1) comprises a main plate (11) and two buckle plates (12);

[0009] The two buckle plates (12) are respectively arranged vertically on both sides of the main plate (11), and one side is fixedly connected with the main plate (11), and the other side is provided with a plurality of claw buckles (13);

[0010] The upper edges of the two main plates (11) are fixedly connected with the corresponding length edges of the upper cover plate (2), the lower edges of the two main plates (11) are fixedly connected with the corresponding length edges of the bottom plate (3), and each buckle plate (12) is clamped with the corresponding end plate (4) through a plurality of claw buckles (13);

[0011] The two side plates (1), the upper cover plate (2), the bottom plate (3) and the two end plates (4) are internally formed with containing spaces for placing the battery cell modules.

[0012] Optionally, the shell further comprises two first sealing edges (14) and two second sealing edges (15).

[0013] The two first sealing edges (14) are respectively arranged at upper portions of the main plate (11) and the two buckle plates (12) and are used for sealing connecting areas among the main plate (11), the two buckle plates (12) and the upper cover plate (2).

[0014] The two second sealing edges (15) are respectively arranged at lower portions of the main plate (11) and the two buckle plates (12) and are used for sealing connecting areas among the main plate (11), the two buckle plates (12) and the bottom plate (3).

[0015] Optionally, the first sealing edge (14) is provided with a plurality of buckles (16), and the upper cover plate (2) comprises a cover plate (21) and a first limiting structure (22).

[0016] The first limiting structure (22) is arranged at a bottom surface of the cover plate (21), a first limiting groove (23) is formed in the first limiting structure (22), and a plurality of first mounting holes (24) are arranged at an inner side of the first limiting structure (22).

[0017] The first sealing edge (14) is arranged in the first limiting groove (23) in an interference manner, so that the connecting areas among the main plate (11), the two buckle plates (12) and the upper cover plate (2) are sealed.

[0018] When the first sealing edge (14) is arranged in the first limiting groove (23), the plurality of buckles (16) are clamped with the plurality of first mounting holes (24), so as to fix the side plate (1) and the upper cover plate (2).

[0019] Optionally, the size of the first sealing edge (14) is in a correlation relationship with the size of the first limiting groove (23), the buckles (16) are correspondingly matched with the first mounting holes (24), and the number of the buckles (16) is the same as the number of the first mounting holes (24).

[0020] Optionally, the second sealing edge (15) is provided with a plurality of limiting members (17), and the bottom plate (3) comprises a support plate (31) and a second limiting structure (32).

[0021] The second limiting structure (32) is arranged on the top surface of the support plate (31), and a second limiting groove (33) is formed in the second limiting structure (32); a plurality of second mounting holes (34) are arranged on the inner side of the second limiting structure (32);

[0022] The second sealing edge (15) is arranged in the second limiting groove (33) in an interference fit, so that the connection area between the main plate (11), the two buckle plates (12) and the bottom plate (3) is sealed.

[0023] When the second sealing edge (15) is arranged in the second limiting groove (33), the plurality of limiting members (17) are connected with the plurality of second mounting holes (34) in a clamping manner, so as to fix the side plate (1) and the bottom plate (3).

[0024] Optionally, the upper end edge of the second sealing edge (15) is provided with a flange (18), the flange (18) abuts against the upper surface of the second limiting groove (33), and the main plate (11), the two buckle plates (12) and the bottom plate (3) are fixed.

[0025] Optionally, the size of the second sealing edge (15) is related to the size of the second limiting groove (33), the limiting member (17) is matched with the second mounting hole (34), and the number of the limiting member (17) is the same as the number of the second mounting hole (34).

[0026] Optionally, the end plate (4) comprises: a plurality of clamping jaw buckle positions (41), and the plurality of clamping jaw buckle positions (41) are arranged on the front end surface of the end plate (4).

[0027] The plurality of clamping jaw buckle positions (41) are connected with the plurality of claw buckles (13) in a clamping manner, so that the corresponding buckle plates (12) are fixedly connected with the front end surface of the end plate (4), wherein the claw buckle (13) is matched with the clamping jaw buckle position (41), and the number of the claw buckle (13) is the same as the number of the clamping jaw buckle position (41).

[0028] Optionally, the inner side of the buckle plate (12) is provided with a sealing member, and the end plate (4) further comprises: two third limiting structures (42).

[0029] The two third limiting structures (42) are arranged on the two sides of the end plate (4) respectively.

[0030] The sealing member is connected with the corresponding third limiting structure (42) in an interference fit, so that the connection area between the main plate (11), the two buckle plates (12) and the end plate (4) is sealed.

[0031] In another aspect, the application provides an energy storage device, comprising the shell and the cell module as described in the first aspect and various possible implementation manners of the first aspect.

[0032] The cell module is arranged in the accommodating space formed by the shell.

[0033] The application provides an energy storage device shell and an energy storage device, comprising two side plates (1), an upper cover plate (2), a bottom plate (3) and two end plates (4); the upper cover plate (2) and the bottom plate (3) are arranged opposite to each other along a first direction, the two side plates (1) are arranged opposite to each other along a second direction, and the two end plates (4) are arranged opposite to each other along a third direction; the side plate (1) comprises a main plate (11) and two buckle plates (12); the two buckle plates (12) are respectively arranged vertically on both sides of the main plate (11), and one side is fixedly connected with the main plate (11), and the other side is provided with a plurality of pawls (13); the upper edges of the two main plates (11) are fixedly connected with the corresponding length edges of the upper cover plate (2), the lower edges of the two main plates (11) are fixedly connected with the corresponding length edges of the bottom plate (3), and each buckle plate (12) is clamped with the corresponding end plate (4) through a plurality of pawls (13); the two side plates (1), the upper cover plate (2), the bottom plate (3) and the two end plates (4) form an accommodating space inside, and the accommodating space is used for placing a cell module. The side plate, the upper cover plate, the bottom plate and the end plate are clamped and connected with each other to form a sealed whole, which reduces the waste of the cell installation space in the energy storage device and solves the problems of difficult operation and high cost of the sealing cover plate of the traditional battery Pack device. BRIEF DESCRIPTION OF DRAWINGS

[0034] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application.

[0035] Figure 1 A structure schematic view of an energy storage device shell and an energy storage device provided by the embodiment of the application;

[0036] Figure 2 A side view of an energy storage device shell and an energy storage device provided by the embodiment of the application;

[0037] Figure 3 A sectional view of an energy storage device shell and an energy storage device provided by the embodiment of the application;

[0038] Figure 4 A structure schematic view of a side plate in an energy storage device shell provided by the embodiment of the application;

[0039] Figure 5A structural schematic diagram of an end plate in a housing of an energy storage device is provided in the embodiments of the present application.

[0040] Legend of reference signs:

[0041] 1 - side plate; 11 - main plate; 12 - buckle plate; 13 - claw buckle; 14 - first sealing edge; 15 - second sealing edge; 16 - buckle; 17 - limiting piece; 18 - flange;

[0042] 2 - upper cover plate; 21 - cover plate; 22 - first limiting structure; 23 - first limiting groove; 24 - first mounting hole;

[0043] 3 - bottom plate; 31 - support plate; 32 - second limiting structure; 33 - second limiting groove; 34 - second mounting hole;

[0044] 4 - end plate; 41 - claw buckle position; 42 - third limiting structure.

[0045] Through the above drawings, the specific embodiments of the present application have been shown, and more detailed descriptions will be given hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0046] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments are not meant to represent all implementations consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0047] First, the terms involved in the present application are explained:

[0048] Battery cell: refers to a single electrochemical cell containing positive and negative electrodes, which is generally not directly used. It is distinguished from a battery which contains a protection circuit and a shell and can be directly used.

[0049] Energy storage MTB is the abbreviation of Module to Bracket, which means that the battery module is directly integrated into the battery cluster frame of the energy storage system.

[0050] The conventional battery Pack device is composed of battery cells to form a module, the module is placed in the Pack, and the Pack is sealed to protect the battery cell module. The sealing cover plate of the battery Pack device is often distributed around the module by multiple bolts to be fixed with the module bottom plate to form a sealed module, that is, the sealing of the energy storage device needs to be sealed by the upper cover and the lower box body.

[0051] The sealing cover plate has a large upper cover area and a high energy storage module, and has problems of high manufacturing cost and complex process, and the bolt fixing edge occupies the space for mounting the battery cell, resulting in low energy density of the group Pack energy storage device and waste of the installation space in the energy storage device.

[0052] To solve the above technical problems, the shell of the energy storage device provided by the embodiment of the present application is formed by the side plate 1, the upper cover plate 2, the bottom plate 3 and the end plate 4 connected with each other by buckling, thereby reducing the waste of the space for mounting the battery cell in the energy storage device, solving the problems of difficult operation and high cost of the sealing cover plate of the traditional battery Pack device. The glue groove is used to seal the sealing grooves from each other, so that the overall energy storage device reaches the IP65 level.

[0053] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail in the following specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in detail in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0054] As shown in Figure 1 As shown in 4, the shell of the energy storage device provided by the embodiment of the present application comprises two side plates 1, an upper cover plate 2, a bottom plate 3 and two end plates 4. The upper cover plate 2 and the bottom plate 3 are arranged opposite to each other along a first direction, the two side plates 1 are arranged opposite to each other along a second direction, and the two end plates 4 are arranged opposite to each other along a third direction. The side plate 1 comprises a main plate 11 and two buckle plates 12. The two buckle plates 12 are vertically arranged on both sides of the main plate 11, and one side is fixedly connected with the main plate 11, and the other side is provided with a plurality of pawls 13. The upper edges of the two main plates 11 are fixedly connected with the length edges of the upper cover plate 2 corresponding to the upper edges, the lower edges of the two main plates 11 are fixedly connected with the length edges of the bottom plate 3 corresponding to the lower edges, and each buckle plate 12 is connected with the corresponding end plate 4 through the plurality of pawls 13. The two side plates 1, the upper cover plate 2, the bottom plate 3 and the two end plates 4 form an accommodating space therein, and the accommodating space is used for placing the battery cell module.

[0055] The first direction can be, for example, a direction perpendicular to the horizontal plane, the second direction can be a horizontal direction, and the third direction can be a direction perpendicular to the second direction in the same horizontal plane. The first direction, the second direction and the third direction are perpendicular to each other, so as to ensure the stability and firmness of the shell structure. The side plate can be, for example, a steel plate structure, which is used to improve the firmness of the shell. The bottom plate can be, for example, a liquid cooling plate, which cools the energy storage device by circulating the cooling liquid in the cooling channel at the bottom of the battery cell, so as to maintain the temperature and temperature difference in the energy storage device within a set range.

[0056] It can be understood that the two side plates 1, the upper cover plate 2, the bottom plate 3 and the two end plates 4 together enclose a containing space, which is used to place the battery module, and provides a place for the battery module of the energy storage device. The side plate as a steel plate structure can enhance the firmness of the shell and ensure the stability of the overall structure. Each buckle plate 12 is clamped with the corresponding end plate 4 through the claw buckle 13 thereon, which simplifies the assembly process and improves the overall stability of the shell.

[0057] It should be noted that the selection of the various plate structures in the present application can be determined according to actual use and the characteristics of the energy storage device. For example, factors such as strength, corrosion resistance and heat conduction performance can be considered to select materials with superior performance to achieve the present application. The present application is not limited herein.

[0058] As shown in Figure 1 and Figure 4 The shell of the energy storage device provided by the embodiments of the present application further comprises two first sealing edges 14 and two second sealing edges 15. The two first sealing edges 14 are respectively arranged at the upper portions of the main plate 11 and the two buckle plates 12, and are used to seal the connection areas between the main plate 11, the two buckle plates 12 and the upper cover plate 2. The two second sealing edges 15 are respectively arranged at the lower portions of the main plate 11 and the two buckle plates 12, and are used to seal the connection areas between the main plate 11, the two buckle plates 12 and the bottom plate 3.

[0059] The two first sealing edges 14 are respectively arranged at the upper portions of the main plate 11 and the two buckle plates 12, and the two second sealing edges 15 are respectively arranged at the lower portions of the main plate 11 and the two buckle plates 12. Through the first sealing edges 14 and the second sealing edges 15, the connection areas between the side plates 1 and the upper cover plate 2 or the bottom plate 3 can be sealed, and the upper and lower connection portions can be sealed.

[0060] It can be understood that the design of the sealing edges can effectively prevent external substances (such as dust, water vapor, etc.) from entering the inside of the shell, ensure that the environment inside the battery module is relatively stable and clean, and avoid affecting the performance and service life of the energy storage device due to external factors. From the bottom direction, it is more likely that some substances will penetrate from the bottom and affect the operation of the battery, so the second sealing edge 15 also plays a role in isolating external adverse factors, ensuring the overall sealing performance of the shell, especially preventing some substances that may penetrate from the bottom from affecting the battery module, further improving the reliability and stability of the operation of the energy storage device. At the same time, the existence of the sealing edges also reduces the heat exchange between the inside and outside of the shell, which helps to maintain the stability of the temperature inside the shell, further improving the performance and service life of the energy storage device.

[0061] Specifically, the first sealing edge 14 and the second sealing edge 15 can be made of elastic materials, such as rubber, silicone, etc., to ensure that they can be connected with the connecting area in an interference fit, forming an effective sealing barrier.

[0062] Optionally, to seal the connecting area between the side plate 1 and the upper cover plate 2 or the bottom plate 3, a sealing glue, a sealing gasket, or a welding seal can also be used, which will not be described here.

[0063] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the shell of the energy storage device provided by the embodiment of the present application is provided with a plurality of buckles 16 on the first sealing edge 14, and the upper cover plate 2 comprises a cover plate 21 and a first limiting structure 22. The first limiting structure 22 is arranged on the bottom surface of the cover plate 21, and a first limiting groove 23 is formed in the first limiting structure 22. The inner side of the first limiting structure 22 is provided with a plurality of first mounting holes 24. The first sealing edge 14 is arranged in the first limiting groove 23 in an interference fit, so as to seal the connecting area between the main plate 11, the two clamping plates 12, and the upper cover plate 2. When the first sealing edge 14 is arranged in the first limiting groove 23, the plurality of buckles 16 are clamped with the plurality of first mounting holes 24, so as to fix the side plate 1 and the upper cover plate 2.

[0064] Among them, the first sealing edge 14 is provided with a plurality of buckles 16, which are designed to be clamped with the corresponding structure on the upper cover plate 2, so as to realize the dual functions of sealing and fixing. The upper cover plate 2 is composed of a cover plate 21 and a first limiting structure 22. The cover plate 21 constitutes the top of the shell, and the first limiting structure 22 is arranged on the bottom surface of the cover plate 21 and used for cooperation with the first sealing edge 14. A first limiting groove 23 is formed in the first limiting structure 22, and the shape and size of the groove are matched with the first sealing edge 14, so as to ensure that the first sealing edge can be arranged in the first limiting groove 23 in an interference fit, thereby realizing the sealing effect. The inner side of the first limiting structure 22 is also provided with a plurality of first mounting holes 24, which correspond to the buckles 16 on the first sealing edge 14 and are used for clamping and fixing.

[0065] It can be understood that the first limiting structure 22 can be a sealing strip, for example, provided with a sealing groove, and the first sealing edge 14 is placed in the first limiting groove 23 in an interference fit. The interference fit can make the first sealing edge 14 tightly fill in the first limiting groove 23, effectively block the possible gaps, so as to realize the sealing of the connecting area between the main plate 11, the two clamping plates 12, and the upper cover plate 2, prevent the dust, water vapor, and other substances in the outside from entering the containing space inside the shell, and ensure that the internal cell module is in a relatively stable and clean environment.

[0066] Specifically, when the first sealing edge 14 is interference fitted in the first limiting groove 23, the close fit between the sealing edge and the limiting groove effectively prevents the entry of external contaminants, ensuring the sealing of the shell. At the same time, the buckle 16 on the first sealing edge 14 is clamped with the first mounting hole 24 on the first limiting structure 22, and the side plate 1 and the upper cover plate 2 are firmly fixed together through this clamping mode to form a relatively stable overall structure, which ensures that the components of the shell will not easily displace or loosen during normal use, maintaining the stability and sealing of the overall structure, which not only simplifies the assembly process, but also ensures that the side plate and the upper cover plate will not easily displace after installation.

[0067] For example, it can be assumed that the buckle 16 is a plastic buckle with a certain elasticity. When the first sealing edge 14 is inserted into the first limiting groove 23, the buckle 16 will be subjected to a certain extrusion and will elastically deform. After the buckle 16 is aligned with the first mounting hole 24, the buckle 16 will be clamped into the mounting hole under the action of the elastic restoring force of the buckle 16, completing the fixed connection of the side plate 1 and the upper cover plate 2, which not only ensures the tightness of the connection, but also realizes the sealing function of the connection area.

[0068] Through this design, the connection between the side plate 1 and the upper cover plate 2 not only realizes the sealing effect, but also ensures the stability of the structure, which helps to improve the overall performance and safety of the energy storage device. Correspondingly, the clamping and fixing mode makes the assembly process more convenient and fast, reducing the production cost and operation cost.

[0069] As shown in Figure 3 and Figure 4 , the shell of the energy storage device provided by the embodiment of the present application has a correlation between the size of the first sealing edge 14 and the size of the first limiting groove 23, the buckle 16 corresponds to the first mounting hole 24, and the number of buckles 16 is the same as the number of first mounting holes 24.

[0070] The size of the first sealing edge 14 can be accurately designed to ensure that it can be interference fitted in the first limiting groove 23. The close contact between the sealing edge and the limiting groove is ensured by interference fit, thereby effectively preventing the entry of external contaminants (such as dust, moisture, etc.) into the inside of the shell. In addition, the correlation of the size is also reflected in the shape of the sealing edge and the limiting groove, which need to match each other to ensure the accuracy and stability of the installation. For example, the outer diameter of the first sealing edge 14 can be slightly larger than the inner diameter of the first limiting groove 23, thereby forming an interference fit. When the first sealing edge 14 is installed into the first limiting groove 23, it will be subjected to extrusion and will elastically deform, tightly fitting on the inner wall of the limiting groove to maximize the elimination of the gap between the two, realizing reliable sealing effect and protecting the sealing of the connection area of the shell.

[0071] Understandably, since the snap fasteners 16 are located on the first sealing edge 14 and are used to engage with the first mounting holes 24 on the upper cover plate 2, the snap fasteners 16 and the first mounting holes 24 are matched in both number and position. This means that each snap fastener has a corresponding mounting hole, ensuring the uniformity and firmness of the connection. Specifically, the matching of snap fasteners 16 and the first mounting holes 24 means that they are compatible in terms of shape, size, and position. From the perspective of shape and size, the size and shape of the snap fasteners 16 can be smoothly inserted and firmly locked in the first mounting holes 24, without any situation where they cannot be locked in due to size mismatch or are easy to loosen and fall out after being locked in. This matching relationship makes the connection between the side plate 1 and the upper cover plate 2 more firm and stable. Each snap fastener 16 can accurately engage with the corresponding first mounting hole 24, jointly bearing the external force, preventing problems such as loosening or displacement between the side plate 1 and the upper cover plate 2 due to vibration, shaking, etc. during the operation of the energy storage device, and maintaining the integrity of the overall structure of the shell.

[0072] Correspondingly, the number of snap fasteners 16 is the same as the number of first mounting holes 24. This design ensures redundancy and reliability of the connection, which helps to achieve uniform force distribution when connecting the side panel 1 and the top cover 2. When the number is the same, the force points for connection fixation can be distributed more evenly around the connection area, so that the tensile and compressive forces borne by each part can remain relatively balanced, avoiding local weak connections and easy damage due to uneven force distribution, further improving the stability and reliability of the entire connection structure, and ensuring that the shell can function stably during long-term use. Even if one or more snap fasteners / mounting holes malfunction or are damaged, the other snap fasteners / mounting holes can still maintain the stability of the connection. At the same time, the consistency of the number also helps to improve the efficiency and accuracy of assembly. During the assembly process, workers can easily identify and match each snap fastener and mounting hole, thereby quickly completing the assembly work.

[0073] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in the embodiment of this application, the outer shell of an energy storage device has a plurality of limiting members 17 provided on the second sealing edge 15. The base plate 3 includes a support plate 31 and a second limiting structure 32. The second limiting structure 32 is disposed on the top surface of the support plate 31, and a second limiting groove 33 is formed in the second limiting structure 32. A plurality of second mounting holes 34 are provided on the inner side of the second limiting structure 32. The second sealing edge 15 is interference-fitted in the second limiting groove 33 to seal the connection area between the main plate 11, the two buckle plates 12 and the base plate 3. When the second sealing edge 15 is disposed in the second limiting groove 33, the plurality of limiting members 17 are engaged with the plurality of second mounting holes 34 to fix the side plate 1 and the base plate 3.

[0074] The limiting piece 17 is arranged on the second sealing edge 15 and is used to be clamped with the second mounting hole 34 on the bottom plate 3. The number and position of the limiting piece 17 correspond to the second mounting hole 34, ensuring that each limiting piece has a corresponding mounting hole corresponding to it.

[0075] The second mounting hole 34 is arranged on the inner side of the second limiting structure 32 and corresponds to the limiting piece 17. The shape and size of the second mounting hole 34 are designed to match the limiting piece 17, so that they can be tightly clamped together.

[0076] As can be understood, when the second sealing edge 15 is arranged in the second limiting groove 33, the tight contact between the sealing edge and the limiting groove ensures the sealing of the connection area. This sealing mechanism effectively prevents external contaminants (such as dust, moisture, etc.) from entering the inside of the shell, protecting the safety and reliability of the energy storage device.

[0077] In the case where the second sealing edge 15 is arranged in the second limiting groove 33, the clamping of the limiting piece 17 with the second mounting hole 34 realizes the fixed connection between the side plate 1 and the bottom plate 3. This clamping method not only simplifies the assembly process, but also improves the stability and reliability of the connection. Even when the shell is subjected to external impact or vibration, the connection between the side plate and the bottom plate can remain firm, and the installation position accuracy of the side plate is ensured by the limiting protrusion at the bottom edge of the side plate 1 abutting the mounting hole of the tank wall of the lower tank.

[0078] As shown in Figure 3 and Figure 4 The upper end edge of the second sealing edge 15 of the shell of the energy storage device provided by the embodiments of the present application is provided with a flange 18, and the flange 18 abuts against the upper surface of the second limiting groove 33, which is used to fix the main plate 11, the two buckling plates 12 and the bottom plate 3.

[0079] The flange 18 is arranged at the upper end edge of the second sealing edge 15 and is an outward protruding structure. After the flange 18 abuts against the upper surface of the second limiting groove 33, additional fixing force is provided for the connection between the main plate 11, the two buckling plates 12 and the bottom plate 3. This design enhances the overall structural strength of the shell, making the connection between the various components more stable.

[0080] As can be understood, although the main function of the flange 18 is fixation, it also assists the sealing effect to some extent. When the flange 18 tightly abuts against the upper surface of the second limiting groove 33, it reduces the gap in the connection area, thereby reducing the risk of external contaminants entering the inside of the shell.

[0081] Specifically, during the assembly process, the second sealing edge 15 (with the flange 18) is first interference-fitted into the second limiting groove 33. Then, the flange 18 is in close abutment with the upper surface of the second limiting groove 33, forming a fixed connection. The abutment force provided by the flange 18 is equivalent to an additional force that limits the relative displacement of the components, which cooperates and synergizes with the fixing effect provided by the clamping of the limiting member 17 and the second mounting hole 34. It can effectively prevent the second sealing edge 16 from being pulled out of or loosened from the second limiting groove 33 during the operation of the energy storage device due to external factors such as vibration and shaking, thereby better maintaining the fixed state of the main plate 11, the two buckling plates 12, and the bottom plate 3, ensuring the stability of the entire shell structure, and also helping to maintain the sealing effect of this area for a long time, providing reliable protection and stable placement environment for the internal cell module.

[0082] As shown in Figure 3 and Figure 4 , the shell of the energy storage device provided by the embodiments of the present application has a correlation between the size of the second sealing edge 15 and the size of the second limiting groove 33, the limiting member 17 and the second mounting hole 34 are correspondingly matched, and the number of limiting members 17 is the same as the number of second mounting holes 34.

[0083] In this step, the size of the second sealing edge 15 can ensure that it is tightly and stably arranged in the second limiting groove 33 of the bottom plate 3, and the correlation of the size is reflected in the shape, width, depth, and other parameters of the sealing edge and the limiting groove, which need to be matched with each other to ensure the accuracy and stability of the installation. Specifically, the relevant size (such as the outer diameter) of the second sealing edge 15 can be slightly larger than the corresponding size (such as the inner diameter) of the second limiting groove 33, so as to form an interference fit. When the second sealing edge 15 is installed into the second limiting groove 33, the second sealing edge 15 will be elastically deformed due to the extrusion, so that it can be tightly fitted on the inner wall of the second limiting groove 33, and the gap between the two can be eliminated to the greatest extent, thereby reliably sealing the connection area between the main plate 11, the two buckling plates 12, and the bottom plate 3, and creating a good and stable internal environment for the cell module.

[0084] It can be understood that the limiting piece 17 and the second mounting hole 34 correspondingly match, which means that they are mutually adapted in many aspects such as shape, size and position layout. In terms of shape and size, the specific shape and size of the limiting piece 17 is designed to be just able to be smoothly inserted and firmly clamped in the second mounting hole 34, and there will be no situation that it cannot be clamped in or is easily loose after being clamped in due to size inconsistency. The corresponding matching relationship can make the connection between the side plate 1 and the bottom plate 3 more firm and stable. Each limiting piece 17 can accurately combine with the corresponding second mounting hole 34, and they work together to withstand various external forces such as vibration, collision and other external forces generated during the storage device carrying and running, which can effectively resist these external forces and prevent the side plate 1 and the bottom plate 3 from being loose and displaced, which affects the stability of the overall structure of the shell.

[0085] Optionally, the number of limiting pieces 17 is the same as the number of second mounting holes 34, which helps to achieve uniform stress when the side plate 1 and the bottom plate 3 are connected. When the numbers are consistent, the stress points of the fixed connection are evenly distributed around the connection area, so that the tension, pressure and other external forces borne by each part can remain relatively balanced. In this way, the phenomenon of local weak connection and easy damage due to uneven stress is avoided, further improving the stability and reliability of the entire connection structure, and ensuring that the shell can stably play its protection, support and other functions during long-term use.

[0086] As shown in Figure 4 and Figure 5 , the shell of the energy storage device provided by the embodiment of the application comprises: a plurality of clamping jaw buckle positions 41, which are arranged on the front end face of the end plate 4; the plurality of clamping jaw buckle positions 41 are connected with the plurality of claw buckles 13 to enable the corresponding buckle plates 12 to be fixedly connected with the front end face of the end plate 4, wherein the claw buckle 13 correspondingly matches the clamping jaw buckle position 41, and the number of the claw buckles 13 is the same as the number of the clamping jaw buckle positions 41.

[0087] Among them, the end plate 4 is part of the shell of the energy storage device, and a plurality of clamping jaw buckle positions 41 are designed on the front end face thereof. These clamping jaw buckle positions 41 are specially arranged for the connection with the claw buckles 13 on the buckle plates 12. Through this design, the buckle plates 12 can be fixedly connected with the front end face of the end plate 4.

[0088] It can be understood that the number of clamping jaw buckle positions 41 is determined according to actual needs, and they can correspondingly match the claw buckles 13 one by one, that is, the number of claw buckles 13 must be the same as the number of clamping jaw buckle positions 41, so as to ensure that each claw buckle 13 can find a suitable clamping jaw buckle position 41 for connection, thereby ensuring the connection stability and reliability between the buckle plates 12 and the end plate 4.

[0089] Specifically, when it is needed to install the buckle plate 12 to the end plate 4, it is only needed to align the claw buckle 13 on the buckle plate 12 with the clamping claw buckle position 41 on the end plate 4, and then force the two to be clamped together. This connection method is not only simple and easy to operate, but also can effectively improve the assembly efficiency of the energy storage device shell and the stability of the overall structure.

[0090] As shown in Figure 1 , Figure 4 and Figure 5 , the shell of the energy storage device provided by the embodiment of the present application is provided with a sealing element on the inner side of the buckle plate 12, and the end plate 4 further comprises: two third limiting structures 42; the two third limiting structures 42 are respectively arranged on the two sides of the end plate 4; and the sealing element is in interference connection with the corresponding third limiting structure 42, so as to seal the connection area between the main plate 11, the two buckle plates 12 and the end plate 4.

[0091] Among them, the sealing element is arranged on the inner side of the buckle plate 12, which is a key element to ensure the sealing performance of the connection area between the buckle plate 12 and the end plate 4. The material of the sealing element can be, for example, rubber, which has good elasticity, sealing performance and aging resistance, so as to better adapt to different working conditions and play a sealing role. The end plate 4 comprises two third limiting structures 42, and the two third limiting structures 42 are respectively arranged on the two sides of the end plate 4. The structure design is to cooperate with the sealing element on the inner side of the buckle plate 12, and to realize the sealing function through a specific connection mode. The shape, size and position layout of the third limiting structure 42 are all arranged around the sealing requirement.

[0092] It can be understood that the sealing element and the corresponding third limiting structure 42 are in interference connection to realize the sealing function. When assembling, the buckle plate 12 with the sealing element on the inner side approaches the end plate 4, the sealing element contacts the third limiting structure 42 and is extruded into the third limiting structure 42 under the action of external force. Since the size of the sealing element is slightly larger than the size of the internal space of the third limiting structure 42, the sealing element will be elastically deformed and tightly fit on the inner wall of the third limiting structure 42. Through this tight fit, the gap between the main plate 11, the two buckle plates 12 and the end plate 4 is effectively blocked, so as to prevent the dust, water vapor and other harmful substances in the outside world from entering the inside of the shell, create a relatively stable and clean placement environment for the internal battery module, and ensure the normal operation and service life of the energy storage device.

[0093] It should be noted that during the operation of the energy storage device, good sealing is crucial to maintaining the internal environment stable. If the connection area is not well sealed, the entry of external moisture may cause the battery module to be damp, affecting its electrical performance and even causing short circuit and other safety hazards; and the entry of dust and other impurities may accumulate on the surface of the battery and other components, affecting normal working links such as heat dissipation. The interference connection of the sealing member and the third limiting structure 42 can effectively avoid these problems and ensure the performance and stable operation of the energy storage device.

[0094] The shell of the energy storage device provided by the embodiment of the present application is connected by the side plate 1, the upper cover plate 2, the bottom plate 3 and the end plate 4, forming a sealed whole, reducing the waste of the battery installation space in the energy storage device, and solving the problems of difficult operation and high cost of the sealing cover plate of the traditional battery Pack device.

[0095] As shown in Figure 1 The energy storage device provided by the embodiment of the present application includes the shell and the battery module as above.

[0096] The energy storage device mainly consists of two parts, i.e. the shell and the battery module described above. The shell serves as the external protective structure of the entire energy storage device, playing important roles such as support, protection and sealing; the battery module is the core component of the energy storage device for realizing the energy storage function, responsible for storing and releasing electric energy, and the two components cooperate to form a complete energy storage device.

[0097] It can be understood that through the structures of the side plate 1, the upper cover plate 2, the bottom plate 3 and the end plate 4 of the shell, the claw buckle on the buckle plate and the clamping jaw buckle position on the end plate are precisely connected during the assembly of the shell, ensuring the stable connection between the buckle plate and the end plate. At the same time, the interference connection of the sealing member arranged on the inner side of the buckle plate and the third limiting structure on the end plate provides additional sealing protection for the inside of the shell, effectively preventing the invasion of external pollutants. The battery module can resist various physical damages that may exist in the outside world, such as preventing damage to the battery module caused by collision and extrusion during handling and installation; correspondingly, the good sealing of the shell (achieved by various sealing designs such as sealing edges and sealing members) can block the entry of dust, moisture and other adverse factors from the outside into the accommodation space, avoid the influence of dampness and dust on the performance of the battery module, and ensure that the battery module can work in a relatively stable and clean environment.

[0098] Optionally, the energy storage device also has the advantages of easy assembly and maintenance. The simple and effective connection between the components of the shell makes the assembly process more convenient and efficient. At the same time, the design of the shell also facilitates the maintenance and replacement of the battery module, reducing the maintenance cost and time cost. From the functional point of view, the structural design of the shell also provides convenient conditions for the normal operation of the battery module. For example, the bottom plate is designed as a liquid cooling plate structure, and the cooling liquid circulates in the cooling channel at the bottom of the battery, which can effectively cool the battery module, ensure that the temperature and temperature difference in the energy storage device are maintained within the set range, help the battery module to stably perform the energy storage related operations such as charging and discharging, prolong the service life of the battery module, and improve the performance and reliability of the entire energy storage device.

[0099] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0100] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the appended claims.

Claims

1. A housing for an energy storage device, characterized in that, include: Two side plates (1), a top cover plate (2), a bottom plate (3), and two end plates (4); The upper cover plate (2) and the bottom plate (3) are arranged opposite each other along the first direction, the two side plates (1) are arranged opposite each other along the second direction, and the two end plates (4) are arranged opposite each other along the third direction; The side panel (1) includes: a main board (11) and two buckle plates (12); The two buckle plates (12) are respectively vertically arranged on both sides of the main board (11), and one side is fixedly connected to the main board (11), while the other side is provided with multiple claw buckles (13). The upper sides of the two main boards (11) are fixedly connected to the corresponding length side of the upper cover plate (2), and the lower sides of the two main boards (11) are fixedly connected to the corresponding length side of the bottom plate (3). Each buckle plate (12) is engaged with the corresponding end plate (4) by multiple claw buckles (13). The two side plates (1), the top cover plate (2), the bottom plate (3) and the two end plates (4) form a receiving space, which is used to place the battery cell module.

2. The housing of the energy storage device according to claim 1, characterized in that, The housing also includes two first sealing edges (14) and two second sealing edges (15). The two first sealing edges (14) are respectively disposed on the upper part of the main board (11) and the two buckle plates (12) for sealing the connection area between the main board (11), the two buckle plates (12) and the upper cover plate (2); Two second sealing edges (15) are respectively disposed on the lower part of the main board (11) and the two buckle plates (12) for sealing the connection area between the main board (11), the two buckle plates (12) and the base plate (3).

3. The housing of the energy storage device according to claim 2, characterized in that, The first sealing edge (14) is provided with multiple buckles (16), and the upper cover plate (2) includes: a cover plate (21) and a first limiting structure (22); The first limiting structure (22) is disposed on the bottom surface of the cover plate (21), and a first limiting groove (23) is formed in the first limiting structure (22). A plurality of first mounting holes (24) are provided on the inner side of the first limiting structure (22). The first sealing edge (14) is interference-fitted into the first limiting groove (23) to seal the connection area between the main board (11), the two buckle plates (12) and the upper cover plate (2); With the first sealing edge (14) set in the first limiting groove (23), the plurality of the buckles (16) engage with the plurality of the first mounting holes (24) to fix the side plate (1) and the top cover plate (2).

4. The housing of the energy storage device according to claim 3, characterized in that, The size of the first sealing edge (14) is related to the size of the first limiting groove (23). The buckle (16) corresponds to and matches the first mounting hole (24). The number of buckles (16) is the same as the number of the first mounting holes (24).

5. The housing of the energy storage device according to claim 2, characterized in that, The second sealing edge (15) is provided with multiple limiting members (17), and the bottom plate (3) includes: a support plate (31) and a second limiting structure (32); The second limiting structure (32) is disposed on the top surface of the support plate (31), and a second limiting groove (33) is formed in the second limiting structure (32). A plurality of second mounting holes (34) are provided on the inner side of the second limiting structure (32). The second sealing edge (15) is interference-fitted into the second limiting groove (33) to seal the connection area between the main board (11), the two buckle plates (12) and the base plate (3); With the second sealing edge (15) set in the second limiting groove (33), the plurality of limiting members (17) engage with the plurality of second mounting holes (34) to fix the side plate (1) and the bottom plate (3).

6. The housing of the energy storage device according to claim 5, characterized in that, The upper edge of the second sealing edge (15) is provided with a flange (18), which abuts against the upper surface of the second limiting groove (33) to fix the main board (11), the two buckle plates (12) and the base plate (3).

7. The housing of the energy storage device according to claim 5, characterized in that, The dimensions of the second sealing edge (15) are related to the dimensions of the second limiting groove (33). The limiting member (17) corresponds to and matches the second mounting hole (34). The number of limiting members (17) is the same as the number of the second mounting holes (34).

8. The housing of the energy storage device according to claim 1, characterized in that, The end plate (4) includes: a plurality of gripper fasteners (41), the plurality of gripper fasteners (41) being disposed on the front end face of the end plate (4); Multiple gripper latches (41) are engaged with multiple gripper latches (13) so that the corresponding latch plates (12) are fixedly connected to the front end face of the end plate (4). The gripper latches (13) are matched with the gripper latches (41), and the number of gripper latches (13) is the same as the number of gripper latches (41).

9. The housing of the energy storage device according to claim 8, characterized in that, The inner side of the buckle plate (12) is provided with a sealing element, and the end plate (4) further includes: two third limiting structures (42). The two third limiting structures (42) are respectively disposed on both sides of the end plate (4); The sealing element is interference-fitted with the corresponding third limiting structure (42) to seal the connection area between the main board (11), the two buckle plates (12) and the end plate (4).

10. An energy storage device, characterized in that, Includes the housing and battery cell module as described in any one of claims 1-9; The battery cell module is disposed within the receiving space formed by the outer casing.

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