Shell assembly, energy storage device and energy storage system

Abstract

Disclosed in the present application are a shell assembly, an energy storage device and an energy storage system. The shell assembly defines an accommodating space, which is adapted to accommodate a battery cell. The shell assembly comprises: a first shell, wherein the first shell comprises an inner wall of the first shell and an outer wall of the first shell, which are arranged opposite each other; and a first reinforcing structure, wherein the first reinforcing structure is arranged on the outer wall of the first shell, is adapted to reinforce the rigidity of the shell, and is provided with a wall-hanging structure, the wall-hanging structure being adapted in such a way that the energy storage device is fixed to a wall surface by means of the wall-hanging structure.

Description

Shell assembly, energy storage device and energy storage system

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 28, 2023, with application number 202322669541.0 and invention name “Shell assembly, energy storage device and energy storage system”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of electrical technology, and in particular to a housing assembly, an energy storage device, and an energy storage system. Background Art

[0003] With the adjustment of the global energy structure, new energy technologies are booming. Electrochemical energy storage systems are widely used in the power generation, transmission and user sides of the power grid to achieve peak shaving and valley filling, peak and frequency regulation, voltage support and relief of line congestion.

[0004] Currently, as battery energy density gradually increases, energy storage devices are developing towards miniaturization and thinness. In order to achieve thinness and lightness, the thickness of the shell that holds the battery cell is reduced.

[0005] However, due to the thin thickness and low rigidity of the shell, the expansion force between the cells generated after charging the battery cells will cause the shell to deform, resulting in low reliability of the energy storage device.

[0006] Summary of the Invention

[0007] The present application provides a housing assembly, an energy storage device, and an energy storage system, which can increase the reliability of the energy storage equipment.

[0008] In the first aspect, the present application discloses a shell assembly, which defines a accommodating space suitable for accommodating a battery cell. The shell assembly includes: a first shell, the first shell including a first shell inner wall and a first shell outer wall arranged back to back; and a first reinforcement structure, the first reinforcement structure is arranged on the first shell outer wall, the first reinforcement structure is suitable for strengthening the rigidity of the first shell, and the first reinforcement structure is provided with a wall-mounted structure, the wall-mounted structure is suitable for fixing the energy storage device to the wall through the wall-mounted structure.

[0009] In one possible implementation, the wall-hanging structure includes a wall-hanging pin, the first end of which is detachably disposed in the first reinforcing structure, and the second end of which is suitable for being fixedly connected to a hanging bracket, and the hanging bracket is fixedly connected to the wall; or, the wall-hanging structure includes a wall-hanging pin, the first end of which is detachably disposed in the first reinforcing structure, and the second end of which is suitable for being fixedly connected to the wall.

[0010] In one possible implementation, the wall-mounted structure includes a wall-mounted protrusion, which is integrally formed with the first reinforcing structure, and the end of the wall-mounted protrusion facing away from the first shell is suitable for fixed connection with a suspension bracket, and the suspension bracket is fixedly connected to the wall; or, the end of the wall-mounted protrusion facing away from the first shell is suitable for fixed connection with the wall.

[0011] In a possible implementation, the first reinforcement structure includes: a first reinforcement rib, and an extension direction of the first reinforcement rib is parallel to an arrangement direction of the battery cells.

[0012] In a possible implementation, the first reinforcement structure includes: a second reinforcement rib, wherein the second reinforcement rib extends along a first direction, and the first direction is suitable for indicating a length direction of the first shell.

[0013] In one possible implementation, a plurality of second reinforcing ribs are provided on the outer wall of the first shell; along the second direction, the number of the second reinforcing ribs provided in the middle area of ​​the first shell is greater than the number of the second reinforcing ribs provided in the two side areas of the first shell, and the second direction is the width direction of the first shell.

[0014] In a possible implementation, the first reinforcement structure includes: a third reinforcement rib, wherein the third reinforcement rib extends along a second direction, and the second direction is suitable for representing a width direction of the first shell.

[0015] In one possible implementation, a plurality of the third reinforcing ribs are provided on the outer wall of the first shell; along the first direction, the number of the third reinforcing ribs provided in the middle area of ​​the first shell is greater than the number of the third reinforcing ribs provided in the two side areas of the first shell, and the first direction is the length direction of the first shell.

[0016] In one possible implementation, the shell assembly also includes: a second shell, the second shell is suitable for snapping together with the first shell, the second shell includes a second shell inner wall and a second shell outer wall arranged opposite to each other, the second shell inner wall and the first shell inner wall are suitable for defining the accommodating space, and the accommodating space is suitable for accommodating the battery cell; a second reinforcement structure, the second reinforcement structure is arranged on at least one of the second shell inner wall and the second shell outer wall, and the second reinforcement structure is suitable for strengthening the rigidity of the second shell.

[0017] In a possible implementation, the shell assembly further includes a sealing strip, which is provided at a fastening point between the second shell and the first shell.

[0018] In one possible implementation, the shell assembly also includes: a first end plate; and a second end plate, the first end plate and the second end plate are arranged on the first shell inner wall at intervals along the first direction, and the first end plate and the second end plate and the first shell inner wall and the second shell inner wall are suitable for defining the accommodating space.

[0019] In a possible implementation manner, at least one of the first end plate and the second end plate is provided with a gripping member.

[0020] In one possible implementation, the shell assembly also includes: a first side panel, the first side panel is arranged on one side of the inner wall of the first shell, one side edge of the first side panel is connected to the inner wall of the first shell, and the first side panel is connected to the same side end of the first end plate and the second end plate.

[0021] In a possible implementation, the first side plate is provided with a notch, and a projection of the pole of the battery cell along the first direction is located within a projection of the notch along the first direction.

[0022] In one possible implementation, the shell assembly also includes a second side panel and a third side panel, the second side panel and the third side panel are arranged on one side of the inner wall of the first shell, the second side panel and the third side panel are respectively connected to the same side ends of the first end panel and the second end panel; and a gap is provided between the second side panel and the third side panel along the second direction.

[0023] In a possible implementation, a projection of the pole of the battery cell along the first direction is located within a projection of the gap along the first direction.

[0024] A second aspect of the present application provides an energy storage device, which includes a battery cell and a shell assembly. The shell assembly includes the shell assembly provided in the above-mentioned first aspect and any possible implementation of the first aspect.

[0025] A third aspect of the present application provides an energy storage system, which includes an energy storage device and an electrical equipment. The energy storage device is electrically connected to the electrical equipment, and the energy storage device is used to supply power to the electrical equipment. The energy storage device includes the energy storage device provided in the above-mentioned second aspect and any possible implementation of the second aspect.

[0026] The present application provides a shell assembly, an energy storage device, and an energy storage system, wherein the shell assembly includes a first shell, the inner wall of the first shell defines a storage space for accommodating some battery cells, and the outer wall of the first shell is provided with a first reinforcement structure. The first reinforcement structure can enhance the rigidity of the first shell, alleviate the influence of the expansion force between the battery cells on the first shell, and increase the reliability of the energy storage device.

[0027] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] FIG1 is a schematic diagram of an embodiment of an energy storage device provided according to an embodiment of the present application;

[0030] FIG2 is a schematic diagram of another embodiment of an energy storage device provided according to an embodiment of the present application;

[0031] FIG3 is a schematic diagram of another embodiment of an energy storage device provided according to an embodiment of the present application;

[0032] FIG4 is a schematic diagram of another embodiment of an energy storage device provided according to an embodiment of the present application;

[0033] FIG5 is a schematic diagram of another embodiment of an energy storage device provided according to an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. Battery cells;

[0036] 2. Shell assembly; 21. First shell; 22. First reinforcement structure; 23. Wall-mounted structure; 24. First end plate; 25. Second end plate; 26. Reinforcement plate; 27. Second shell; 28. Retaining wall; 29. ​​Second reinforcement structure;

[0037] 3. Fixed frame;

[0038] 4. Decorative cover;

[0039] 6. Insulation frame;

[0040] 7. Electrical connection piece;

[0041] 8. Welding position;

[0042] 9. Gripping member. Specific embodiments

[0043] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] The housing assembly, energy storage device, and energy storage system provided by the present application are described in detail below with reference to the accompanying drawings.

[0045] Please refer to Figures 1 to 5. First, a shell assembly 2 provided in an embodiment of the present application is introduced. The shell assembly 2 refers to the shell in the energy storage device. The shell assembly 2 defines an accommodating space, which is suitable for accommodating the battery cell 1. The shell assembly includes a first shell 21. The first shell 21 includes a first shell 21 inner wall and a first shell 21 outer wall arranged opposite to each other, and a first reinforcement structure 22. The first reinforcement structure 22 is arranged on the outer wall of the first shell 21. The first reinforcement structure 22 is suitable for strengthening the rigidity of the first shell 21, and the first reinforcement structure 22 is provided with a wall-mounted structure 23. The wall-mounted structure 23 is suitable for fixing the energy storage device to the wall through the wall-mounted structure 23.

[0046] In this embodiment, the shape of the housing assembly 2 can be a cube, a rectangular parallelepiped, or other shapes. Those skilled in the art can configure the shape according to actual needs. For example, the housing assembly 2 can be in the shape of a cylinder, an elliptical cylinder, etc., which is not limited to the specific shape here.

[0047] For example, if the housing assembly 2 is in the shape of a rectangular parallelepiped, the battery cell 1 is disposed within the housing assembly 2, and the housing assembly 2 provides protection for the battery cell 1. The housing assembly 2 includes a first housing 21 and a first reinforcement structure 22. The battery cell 1 is partially accommodated within the accommodation space formed by the inner wall of the first housing 21. The inner wall of the first housing 21 is the surface of the first housing 21 on the side closest to the battery cell 1.

[0048] In the embodiment of the present application, the first reinforcement structure 22 enhances the support force of the first housing 21, preventing the excessive weight of the battery cells 1 contained in the first housing 21 from causing deformation of the first housing 21 and affecting the overall shape and connection stability of the housing assembly 2. Furthermore, the first reinforcement structure 22 strengthens the strength of the first housing 21, increasing its rigidity and mitigating the effects of inter-cell expansion forces on the first housing 21, thereby increasing the reliability of the energy storage device.

[0049] In the embodiment of the present application, the first reinforcement structure 22 is disposed on the outer wall of the first housing 21, thereby not occupying the accommodation space defined by the inner wall of the first housing 21. This increases the space available for placing the battery cells within the accommodation space, improves the space utilization within the accommodation space, and enhances the energy density of the energy storage product. Furthermore, the size of the first housing 21 housing the battery cells 1 can be reduced, resulting in a lighter and thinner energy storage device.

[0050] Optionally, in the embodiment of the present application, the first reinforcement structure 22 may be detachably provided on the first shell 21 , and the first reinforcement structure 22 and the first shell 21 may also be integrally formed, which is not specifically limited here.

[0051] In this embodiment, the first reinforcement structure 22 is further provided with a wall-mounted structure 23. The purpose of the wall-mounted structure 23 is to fix the first shell 21 to the wall. This application does not limit the form of the wall-mounted structure 23. The wall-mounted structure 23 is illustrated below with an example.

[0052] In this embodiment, optionally, the wall-hanging structure 23 can be a wall-hanging pin, the first end of which can be detachably arranged in the first reinforcing structure 22, and the second end of which can be fixedly connected to the hanging bracket, which is fixedly connected to the wall.

[0053] In this embodiment, optionally, the wall-hanging structure 23 may be a wall-hanging pin, the first end of which may be detachably disposed in the first reinforcing structure 22 , and the second end of which may also be directly fixedly connected to the wall.

[0054] In this embodiment, optionally, the wall-mounted structure 23 can be a wall-mounted protrusion, which is integrally formed with the first reinforcing structure 22. The end of the wall-mounted protrusion facing away from the first shell 21 can be fixedly connected to the suspension bracket, and the suspension bracket is fixedly connected to the wall.

[0055] In this embodiment, optionally, the wall-mounted structure 23 may be a wall-mounted protrusion, which is integrally formed with the first reinforcing structure 22 , and one end of the wall-mounted protrusion facing away from the first shell 21 may also be fixedly connected to the wall.

[0056] Optionally, in the embodiment of the present application, the wall-mounted structure 23 may be other types of wall-mounted structures in addition to the wall-mounted pins and the wall-mounted protrusions, which are not specifically limited here.

[0057] The first reinforcement structure 22 and the wall-mounted structure 23 are both arranged on one side of the outer wall of the first shell 21, so that the two components share the space outside the first shell 21, reducing space waste and improving space utilization.

[0058] In the embodiment of the present application, compared with the wall-mounted structure 23 being arranged on the first shell 21 , the wall-mounted structure 23 being arranged on the first reinforcement structure 22 can save the number of parts, reduce costs, and reduce assembly processes.

[0059] In the embodiment of the present application, the first reinforcement structure 22 may optionally be implemented in various forms. For example, the first reinforcement structure 22 may be a reinforcement rib, a reinforcement rib, or other types of reinforcement components, which are not specifically limited here.

[0060] For example, if the first reinforcement structure 22 is implemented as a first reinforcement rib, in order to more effectively reduce the impact of the battery cell expansion force on the shell, the extension direction of the first reinforcement structure 22 can be set parallel to the arrangement direction of the battery cells 1.

[0061] In the present application, the arrangement direction of the battery cells 1 in the energy storage device is generally set to be parallel to the width direction of the first shell 21 , or the arrangement direction of the battery cells 1 is set to be parallel to the length direction of the first shell 21 .

[0062] It is understandable that if the arrangement direction of the multiple battery cells 1 is arranged along the length direction of the first shell 21, a second reinforcing rib can be provided on the outer surface of the first shell 21, and the second reinforcing rib extends along the length direction of the first shell 21. Under normal circumstances, the middle position of the first shell 21 is prone to deformation due to bearing excessive weight. From the simulation results, it can be seen that the expansion force of the battery cell 1 has a greater impact on the middle area of ​​the first shell 21. Therefore, optionally, along the width direction, the second reinforcing ribs can be provided in the middle area of ​​the first shell 21 and the two side areas of the first shell 21 respectively, and the number of second reinforcing ribs in the middle area of ​​the first shell 21 is greater than the number of second reinforcing ribs in the two side areas of the first shell 21.

[0063] For example, three second reinforcing ribs are provided in the central region of the first shell 21, and one second reinforcing rib is provided on each side of the first shell 21. This effectively strengthens the structural strength of the central region of the first shell 21, while the uneven distribution of the second reinforcing ribs also reduces weight. In this embodiment of the present application, the second reinforcing ribs may also be provided in other manners on the first shell 21, and the specific arrangement is not limited here.

[0064] It is understandable that if the multiple battery cells 1 are arranged along the width of the first shell 21, third reinforcing ribs can be provided on the outer surface of the first shell 21, and the third reinforcing ribs extend along the width of the first shell 21. Generally, the middle portion of the first shell 21 is prone to deformation due to excessive weight. The simulation results show that the expansion force of the battery cells 1 has a greater impact on the middle region of the first shell 21. Therefore, optionally, along the length direction, the third reinforcing ribs can be provided in the middle region of the first shell 21 and on both sides of the first shell 21, respectively, and the number of third reinforcing ribs in the middle region of the first shell 21 is greater than the number of third reinforcing ribs in the side regions of the first shell 21.

[0065] For example, three third reinforcing ribs are provided in the central region of the first shell 21, and one third reinforcing rib is provided on each side of the first shell 21. This effectively strengthens the structural strength of the central region of the first shell 21. Furthermore, the uneven distribution of the third reinforcing ribs can reduce weight. In this embodiment of the present application, the third reinforcing ribs may be provided in other manners on the first shell 21, and the specific arrangement is not limited here.

[0066] Optionally, in order to further prevent the first shell 21 from deformation and enhance the rigidity of the first shell 21, the first shell 21 may also be provided with second and third reinforcing ribs, which are not specifically limited herein. Those skilled in the art may make the selection according to actual needs.

[0067] In the embodiment of the present application, the housing assembly 2 may optionally further include a second housing 27, which is engaged with the first housing 21. The second housing 27 includes an inner wall of the second housing 27 and an outer wall of the second housing 27 disposed opposite to each other. The inner wall of the second housing 27 and the inner wall of the first housing 21 are used to define an accommodating space, which can accommodate the battery cell 1. In addition, to strengthen the rigidity of the second housing 27, a second reinforcement structure 29 may be further provided on the second housing 27. The second reinforcement structure 29 may be provided on either the inner wall or the outer wall of the second housing 27. The second reinforcement structure 29 may also be provided on both the inner wall and the outer wall of the second housing 27. The specific details are not limited here.

[0068] In the embodiment of the present application, the configuration of the second reinforcement structure 29 is similar to the configuration of the first reinforcement structure 22 mentioned above, and the details are not repeated here.

[0069] In the embodiment of the present application, the material of the first reinforcement structure 22 and the second reinforcement structure 29 can be metal, the material of the first reinforcement structure 22 and the second reinforcement structure 29 can also be plastic, the material of the first reinforcement structure 22 and the second reinforcement structure 29 can also be ceramic, or other materials, and the materials of the first reinforcement structure 22 and the second reinforcement structure 29 can also be different, which is not limited here.

[0070] In the embodiment of the present application, the energy storage device can be designed to be waterproof. Optionally, a sealing strip can be provided at the fastening point between the second shell 27 and the first shell 21, or a sealant can be provided at the fastening point between the first shell 21 and the second shell 27. Then, the battery cell 1 is provided in the accommodating space formed after the first shell 21 and the second shell 27 are fastened together, so that waterproofing can be achieved.

[0071] As shown in Figure 5, sealing strips are provided at the edges of the second housing 27 and the first housing 21. For example, when the first and second housings 21 and 27 are connected together by bolts, the sealing strips are compressed between the first and second housings 21 and 27. By controlling the compression of the sealing strips, the housing assembly 2 is made waterproof, preventing impurities such as accumulated water and dust from entering the housing assembly 2 through the gap between the second housing 27 and the first housing 21 and damaging the battery cells 1. The provision of the sealing strips effectively keeps the interior of the housing assembly 2 clean, extending the service life of the energy storage device.

[0072] In the embodiment of the present application, optionally, the shell assembly 2 may also include a first end plate 24 and a second end plate 25, which are arranged on the inner wall of the first shell 21 at intervals along the second direction, and the first end plate 24 and the second end plate 25 and the inner wall of the first shell 21 and the inner wall of the second shell 27 are suitable for defining an accommodating space.

[0073] Optionally, in one possible implementation, the housing assembly 1 may further include a first side plate, which is disposed on one side of the inner wall of the first housing 21. One edge of the first side plate is connected to the inner wall of the first housing 21, and the first side plate is connected to the same end portion of the first end plate 24 and the second end plate 25. In this embodiment, the first housing 21, the second housing 27, the first end plate 24, the second end plate 25, and the first side plate collectively define an accommodating space, which accommodates the battery cells.

[0074] The first and second end plates 24, 25 are fixed to the inner wall of the first housing 21. They can be made of any one or more materials, such as metal, plastic, ceramic, or wood. They are secured to the inner wall of the first housing 21 by welding, bonding, riveting, or snapping, forming a storage space between them. This effectively increases the structural strength of the first housing 21.

[0075] Optionally, the first housing 21, the first end plate 24, and the second end plate 25 are all made of metal and are integrally formed by sheet metal processing. This method saves the step of connecting the first housing 21, the first end plate 24, and the second end plate 25. Compared with other connection methods, the integral molding can more effectively improve the connection strength and structural strength of the first end plate 24, the second end plate 2425 and the first housing 21.

[0076] In addition, the first side panel is made of metal, plastic, ceramic, wood, etc. The first side panel is fixed to the inner wall of the first shell 21 and / or connected to the first end plate 24 and the second end plate 25 by welding, bonding, riveting, clamping, etc. For example, a plurality of first side panels are provided at both ends of the first direction of the first shell 21. The plurality of first side panels are respectively connected to the first end plate 24 and the second end plate 25. By strengthening the connection between the first shell 21 and the first end plate 24 and the second end plate 25 by the first side panels, the overall structural strength of the first shell 21 and the first end plate 24 and the second end plate 25 can be effectively improved.

[0077] In this embodiment, optionally, the first side plate is provided with a notch, and the projection of the pole of the battery cell 1 along the first direction is located within the projection of the notch along the first direction.

[0078] Optionally, in a possible implementation, the shell assembly 1 may further include a second side panel and a third side panel, the second side panel and the third side panel are arranged on one side of the inner wall of the first shell 21, the second side panel and the third side panel are respectively connected to the same side ends of the first end panel 24 and the second end panel 25, and a gap is provided between the second side panel and the third side panel along the second direction.

[0079] In this embodiment, optionally, the projection of the pole of the battery cell 1 along the first direction is located within the projection of the gap along the first direction.

[0080] In this embodiment, the oblique edge of the reinforcing plate 26 of the first end plate 24, a portion of the first housing 21, and the oblique edge of the reinforcing plate 26 of the second end plate 25 form a space. The space is a trapezoidal structure with an opening at one end. This space is used for welding the terminals of the battery cells 1. Providing the space on the side of the energy storage device facilitates installation and maintenance of the battery cells 1.

[0081] The top of the second housing 27 is connected to the first end plate 24. The bottom of the second housing 27 is connected to the second end plate 25. The retaining wall 28 is embedded in the trapezoidal accommodation space. The second housing 27, the first end plate 24, the first housing 21, the second end plate 25, the retaining wall 28, and the reinforcing plate 26 form a rectangular parallelepiped. In other words, the entire housing assembly 2 is a rectangular parallelepiped.

[0082] The arrangement of the second shell 27 and the first shell 21 facilitates the installation of the battery cell 1 , and can effectively protect the battery cell 1 .

[0083] Of course, in the embodiment of the present application, the housing assembly 2 is not limited to the above structure, and those skilled in the art can configure it according to actual needs.

[0084] Optionally, the housing assembly 2 further includes a decorative cover 4 . A second reinforcement structure 29 is provided on the wall of the second housing 27 facing away from the first housing 21 . The decorative cover 4 covers the second reinforcement structure 29 and is fixedly connected to the second housing 27 .

[0085] As shown in Figure 1, the top of the second housing 27 is connected to the first end plate 24. The bottom of the second housing 27 is connected to the second end plate 24. The second housing 27, the first end plate 23, the first housing 21, the second end plate 24, the reinforcing plate 26, and the retaining wall 28 together form the housing assembly 2. The battery cell 1 is disposed within the housing assembly 2, and the housing assembly 2 provides protection for the battery cell 1.

[0086] The second reinforcement structure 29 is set on the outer wall of the second shell 27 by screws, and the second reinforcement structure 29 is set back from the battery cell 1 to enhance the structural strength of the second shell 27 through the second reinforcement structure 29. The second shell 27 cooperates with the first shell 21 to form the shell assembly 2, thereby fixing the battery cell 1 located inside the shell assembly 2. Since the second reinforcement structure 29 is located on the outer wall of the second shell 27, it can avoid wasting the storage space, increase the capacity of the energy storage device, and effectively improve the utilization rate of the storage space. The decorative cover 4 is fixed on the outer wall of the second shell 27 and covers the outside of the second reinforcement structure 29, which can enhance the aesthetics of the energy storage device.

[0087] As shown in Figures 1 to 5, the oblique edge of the reinforcing plate 26 of the first end plate 24, a portion of the first housing 21, and the oblique edge of the reinforcing plate 26 of the second end plate 25 form a space. The space is a trapezoidal structure with an opening at one end. This space is used for welding the terminals of the battery cell 1. Providing the space on the side of the energy storage device facilitates installation and maintenance of the battery cell 1.

[0088] In the embodiments of the present application, it can be understood that the end portion may refer to the edge of the board, or may refer to a position near the edge, which is not specifically limited here.

[0089] Optionally, the housing assembly may further include a fixing frame 3 , which is disposed on one side of the inner wall of the first housing 21 and extends in a direction away from the inner wall of the first housing 21 . The fixing frame 3 is suitable for carrying the battery cell 1 .

[0090] In this example, the fixing frame 3 is a frame structure. There are one or more fixing frames 3. The battery cells 1 are directly or indirectly mounted on the fixing frame 3. The fixing frame 3 facilitates the installation of the battery cells 1.

[0091] In addition, the battery cell 1 is indirectly fixed to the first housing 21 via the fixing frame 3. Since the fixing frame 3 is fixedly connected to the first housing 21, the fixing frame 3 can also improve the bearing capacity of the first housing 21.

[0092] Optionally, limiting structures are provided at both ends of the fixing frame 3 , and the limiting structures are suitable for positioning the battery cell 1 .

[0093] For example, the limiting structure is a protrusion or a groove for positioning the battery cell 1. The limiting structure can effectively position the battery cell 1 and prevent the battery cell from moving on the fixing frame 3.

[0094] Furthermore, the limiting structure is formed by folding edges at both ends of the fixing frame 3 to form limiting protrusions.

[0095] For example, the fixing frame 3 comprises a metal plate. The ends of the metal plate are folded to form stopper protrusions. This method facilitates the production of the stopper protrusions and eliminates the need to connect the stopper structure to the fixing frame 3. During installation, the battery cell 1 is secured to the fixing frame 3 and positioned between the two stopper protrusions.

[0096] The height of the limiting protrusion is not limited here, and those skilled in the art can set it according to actual needs.

[0097] Optionally, the fixing frame 3 extends along the length direction of the first shell 21 and is fixed on the inner wall of the first shell 21, so that the battery cell 1 is arranged on the inner wall of the first shell 21 along the length direction. The first reinforcement structure 22 extends along the width direction and is fixed on the outer wall of the first shell 21. In this example, the first reinforcement structure 22 is orthogonal to the fixing frame 3. Compared with the setting method in which the extension direction of the first reinforcement structure 22 is parallel to the extension direction of the fixing frame 3, this method can effectively improve the structural strength of the first shell 21 in different directions. The limiting protrusion on the fixing frame 3 can limit the position of the battery cell 1 to prevent the battery cell 1 from shaking during installation or use and causing damage to the energy storage device.

[0098] Of course, in the embodiment of the present application, the fixing frame 3 and the first reinforcement structure 22 are not limited to being orthogonal, and may also be intersecting at any angle. Those skilled in the art may select the angle of intersection between the two according to actual needs.

[0099] In the present application, optionally, in order to facilitate the transportation or movement of the energy storage device, at least one of the first end plate 24 and the second end plate 25 may be provided with a gripping member 9 so that relevant staff can conveniently move the energy storage device.

[0100] As shown in Figure 1, gripping members 9 are provided at both ends of the first end plate 24. Gripping members 9 are also provided at both ends of the second end plate 25. For example, the gripping members are strip-shaped through-holes provided on the first and second end plates 24, 25. When wall-mounting, the operator's hand can pass through the strip-shaped through-holes, effectively grasping the energy storage device. The gripping members 9 facilitate wall-mounting operations.

[0101] Of course, the gripping member 9 is not limited to the above embodiments, and those skilled in the art can configure it according to actual needs.

[0102] Optionally, an insulating frame 6 is fixed on the inner wall of the first shell 21 , an electrical connection piece 7 is fixed on the insulating frame 6 , and welding positions 8 are provided at positions of the electrical connection piece 7 corresponding to the electrodes of the battery cell 1 .

[0103] As shown in Figures 1 and 4, the insulating frame 6 is arranged on the inner wall of the first shell 21 by means of bolt connection, clamping, riveting, etc. The material of the insulating frame 6 is plastic, rubber, silicone, ceramic, etc. The electrical connecting piece 7 is arranged on the insulating frame 6 by means of bolt connection, riveting, clamping, etc. The electrical connecting piece 7 is used to connect to the output cable or input cable of the battery cell 1 to realize the charging and discharging function of the battery cell 1. The insulating frame 6 is not only used to place the electrical connecting piece 7, but also to lay cables. The cables are laid on the insulating frame 6, which makes the overall exterior of the energy storage device simple and improves the aesthetics.

[0104] For example, the common negative cable for each cell 1 is connected to the battery management system via an electrical connector 7, while the common positive cable for each cell 1 is connected to an external output port via another electrical connector 7, enabling charging and discharging of the cells 1. Each cell 1 is connected to a voltage sampling line, which is then connected to the battery management system. The battery management system is connected to a communication cable. This communication cable is connected to an external communication port, enabling communication between the energy storage device and external devices.

[0105] Of course, in the embodiment of the present application, the housing assembly 2 is not limited to the above structure, and those skilled in the art can configure it according to actual needs.

[0106] The present application also provides an energy storage device, which includes a battery cell 1 and a shell assembly 2. The shell assembly 2 is the shell assembly 2 described in any one of the above embodiments.

[0107] In addition, the present application also provides an energy storage system, which may include an energy storage device and an electrical device. The energy storage device is electrically connected to the electrical device, and the energy storage device is used to supply power to the electrical device. The energy storage device is such as the energy storage device provided in the embodiment described above.

[0108] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0109] References herein to "one embodiment," "an embodiment," or "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Furthermore, please note that examples of the phrase "in one embodiment" herein do not necessarily all refer to the same embodiment. In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present application may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0110] In the claims, any reference signs placed between brackets shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present application may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A housing assembly, wherein: The housing assembly (2) defines a housing space, wherein the housing space is suitable for accommodating the battery cell (1), and the housing assembly (2) comprises: A first shell (21), the first shell (21) comprising a first shell (21) inner wall and a first shell (21) outer wall disposed opposite to each other; and A first reinforcement structure (22), wherein the first reinforcement structure (22) is arranged on the outer wall of the first shell (21), the first reinforcement structure (22) is suitable for strengthening the rigidity of the first shell (21), and the first reinforcement structure (22) is provided with a wall-mounted structure (23), and the wall-mounted structure (23) is suitable for fixing the energy storage device to a wall surface through the wall-mounted structure (23).

2. The housing assembly according to claim 1, wherein: The wall hanging structure (23) comprises a wall hanging pin, the first end of which is detachably arranged in the first reinforcing structure (22), and the second end of which is suitable for being fixedly connected to a hanging bracket, and the hanging bracket is fixedly connected to the wall; Alternatively, the wall-hanging structure (23) comprises a wall-hanging pin, a first end of which is detachably arranged in the first reinforcing structure (22), and a second end of which is suitable for being fixedly connected to a wall.

3. The housing assembly according to claim 1, wherein: The wall-mounted structure (23) comprises a wall-mounted protrusion, the wall-mounted protrusion and the first reinforcing structure (22) are integrally formed, and one end of the wall-mounted protrusion facing away from the first shell (21) is suitable for being fixedly connected to a hanging bracket, and the hanging bracket is fixedly connected to the wall; Alternatively, the end of the wall-hanging protrusion facing away from the first shell (21) is suitable for being fixedly connected to a wall.

4. The housing assembly according to claim 1, wherein: The first reinforcement structure (22) comprises: A first reinforcing rib, wherein the extending direction of the first reinforcing rib is parallel to the arrangement direction of the battery cells (1).

5. The housing assembly according to any one of claims 1 to 4, wherein: The first reinforcement structure (22) comprises: A second reinforcing rib, wherein the second reinforcing rib extends along a first direction, and the first direction is suitable for indicating a length direction of the first shell (21).

6. The housing assembly according to any one of claims 5, wherein: A plurality of the second reinforcing ribs are arranged on the outer wall of the first shell (21); Along the second direction, the number of the second reinforcing ribs arranged in the middle area of ​​the first shell (21) is greater than the number of the second reinforcing ribs arranged in the two side areas of the first shell (21), and the second direction is the width direction of the first shell (21).

7. The housing assembly according to any one of claims 1 to 4, wherein: The first reinforcement structure (22) comprises: A third reinforcing rib, wherein the third reinforcing rib extends along a second direction, and the second direction is suitable for indicating a width direction of the first shell (21).

8. The housing assembly according to claim 7, wherein: A plurality of third reinforcing ribs are arranged on the outer wall of the first shell (21); Along a first direction, the number of the third reinforcing ribs arranged in the middle area of ​​the first shell (21) is greater than the number of the third reinforcing ribs arranged in the two side areas of the first shell (21), and the first direction is the length direction of the first shell (21).

9. The housing assembly according to any one of claims 1 to 4, wherein: The housing assembly (2) further comprises: a second shell (27), the second shell (27) being adapted to be buckled with the first shell (21), the second shell (27) comprising an inner wall of the second shell (27) and an outer wall of the second shell (27) arranged opposite to each other, the inner wall of the second shell (27) and the inner wall of the first shell (21) being adapted to define the accommodation space, the accommodation space being adapted to accommodate the battery cell (1); A second reinforcement structure (29), wherein the second reinforcement structure (29) is arranged on at least one of the inner wall of the second shell (27) and the outer wall of the second shell (27), and the second reinforcement structure (29) is suitable for strengthening the rigidity of the second shell (27).

10. The housing assembly according to claim 9, wherein: The housing assembly (2) further comprises a sealing strip, which is arranged at the buckling position between the second housing (27) and the first housing (21).

11. The housing assembly according to claim 9, wherein: The housing assembly (2) further comprises: a first end plate (24); and The second end plate (25), the first end plate (24) and the second end plate (25) are connected along a first direction The first end plate (24) and the second end plate (25) are arranged at intervals on the inner wall of the first shell (21), and the inner wall of the first shell (21) and the inner wall of the second shell (27) are suitable for defining the accommodating space.

12. The housing assembly according to claim 11, wherein: At least one of the first end plate (24) and the second end plate (25) is provided with a gripping member (9).

13. The housing assembly according to claim 11, wherein: The housing assembly (2) further comprises: A first side plate, the first side plate is arranged on one side of the inner wall of the first shell (21), one side edge of the first side plate is connected to the inner wall of the first shell (21), and the first side plate is connected to the same side end of the first end plate (24) and the second end plate (25).

14. The housing assembly according to claim 13, wherein: The first side plate is provided with a notch, and the projection of the pole of the battery cell (1) along the first direction is located within the projection of the notch along the first direction.

15. The housing assembly according to claim 11, wherein: The housing assembly (2) further comprises: A second side plate and a third side plate, wherein the second side plate and the third side plate are arranged on one side of the inner wall of the first shell (21), the second side plate and the third side plate are respectively connected to the same side ends of the first end plate (24) and the second end plate (25), and a gap is arranged between the second side plate and the third side plate along the second direction.

16. The housing assembly according to claim 15, wherein: The projection of the pole of the battery cell (1) along the first direction is located within the projection of the gap along the first direction.

17. An energy storage device, wherein: The energy storage device comprises a battery cell (1) and a shell assembly (2), wherein the shell assembly (2) comprises the shell assembly according to any one of claims 1 to 16.

18. An energy storage system, wherein: The energy storage system includes an energy storage device and an electrical equipment, the energy storage device is electrically connected to the electrical equipment, the energy storage device is used to supply power to the electrical equipment, and the energy storage device includes the energy storage device as claimed in claim 16.

Images