Energy storage device

Abstract

The utility model discloses an energy storage device, which relates to the technical field of energy storage, and comprises at least two box bodies which are stacked along a first direction, an electrical device is arranged in each box body, the electrical devices in the two box bodies are electrically connected, a connecting part is arranged at the end part, facing the other box body, of one box body, and the other box body is connected with the connecting part. A limiting convex part is arranged on the outer side face of the connecting part, a matching groove is formed in the corresponding end of the other box body, a matching part is arranged at the position corresponding to the matching groove, and the connecting part and the matching groove are rotationally matched in the axial direction where the first direction is located, so that when the connecting part reaches the set position in the matching groove, the limiting convex part and the matching part are matched to form a connecting structure; the fixing device is used for limiting the two box bodies to be fixed in the first direction. According to the energy storage equipment, the two box bodies are connected without screws for installation and fixation, the operation is simple during assembly, the installation complexity of a user side is reduced, the installation convenience is improved, and the energy storage equipment can be stacked next to a wall surface and can also be independently placed.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to energy storage equipment. Background Art

[0002] Energy storage devices are becoming an integral part of daily life. Currently, mainstream designs utilize modular all-in-one or split-unit systems for both energy storage and conversion to meet load demands. For end users, all-in-one solutions offer the advantages of a unified aesthetic and a smaller footprint, aligning with the characteristics of home appliances and becoming a key design option.

[0003] Currently, the connections between different modules of the all-in-one machine are mainly fixed by nuts and screws, which has low installation efficiency and requires a lot of manual operation. Utility Model Content

[0004] The main purpose of the utility model is to propose an energy storage device, which aims to optimize the connection method between different modules, eliminate the need for screw installation and fixation, and improve the convenience of installation.

[0005] To achieve the above object, the present invention provides an energy storage device, comprising at least two boxes stacked along a first direction, each box being provided with an electrical device, and the electrical devices in the two boxes being electrically connected;

[0006] A connecting portion is provided at the end of one of the boxes facing the other box, and a limiting protrusion is provided on the outer side surface of the connecting portion. A matching groove is provided at the corresponding end of the other box, and a matching portion is provided at the position corresponding to the matching groove. The connecting portion and the matching groove are rotated and matched along the axial direction of the first direction, so that when the connecting portion reaches the set position in the matching groove, the limiting protrusion cooperates with the matching portion to form a connecting structure, which is used to limit the two boxes to be fixed in the first direction.

[0007] In one embodiment, the two boxes can rotate relative to each other along a first direction to drive the connecting portion to rotate and engage with the engaging groove.

[0008] In one embodiment, a limiting groove is formed on the inner side wall of the matching groove, and the limiting groove extends along the circumference of the matching groove, and the limiting groove cooperates with the limiting protrusion;

[0009] The matching portion includes the limiting groove.

[0010] In one embodiment, the inner side wall of the matching groove is formed with an internal thread, and the limiting groove includes a thread groove formed by the internal thread;

[0011] An external thread is provided on the outer side surface of the connecting portion, and a thread protrusion of the external thread forms the limiting protrusion.

[0012] In one embodiment, the energy storage device further includes an electrical connection structure, which includes two connectors correspondingly arranged on the two boxes, the two connectors are electrically connected to the electrical equipment respectively, and the two connectors are plugged in and matched to achieve electrical connection.

[0013] In one embodiment, a first through hole communicating with the corresponding box body is formed on the bottom wall of the matching groove, and a second through hole communicating with the corresponding box body is formed in the middle of the connecting portion;

[0014] The two connectors are plugged and matched through the first through hole and the second through hole.

[0015] In one embodiment, the sides of the two boxes in the second direction are both provided with a communication hole;

[0016] At least one of the two connectors can extend from the corresponding communicating hole for plug-in mating.

[0017] In one embodiment, the energy storage device further includes a stop structure, and the stop structure includes:

[0018] a stopper movably mounted to the outside of one of the boxes along a first direction, the stopper being movable to protrude from the end surface of the corresponding box toward the other box; and

[0019] The stop groove extends along the first direction and is arranged outside the other box body. The stop groove is opened toward the side of the stop member so as to allow the stop member to be movably inserted when the two boxes are fixedly connected.

[0020] In one embodiment, at least one of the boxes comprises:

[0021] a box body, wherein one side of the box body along the second direction is open, and an electrical device is arranged in the box body; and

[0022] The end cover is arranged on the open side of the box body and is detachably installed.

[0023] In one embodiment, the energy storage device further includes a locking structure, which includes a locking portion and a buckling portion that cooperate with each other, and the locking portion and the buckling portion are respectively provided on the two boxes so that the two boxes are locked and matched.

[0024] In one embodiment, the energy storage device includes a plurality of boxes stacked along a first direction, and the connection structure is provided between every two adjacent boxes.

[0025] In one embodiment, the electrical devices in the two adjacent boxes are respectively configured as power conversion devices and energy storage battery pack devices.

[0026] In one embodiment, decorative gusset plates are installed on two opposite sides of each box along the second direction.

[0027] In one embodiment, a wall fixing mechanism is provided on the outside of at least one of the boxes so as to lock the energy storage device on the wall.

[0028] In the technical solution of this utility model, the connecting portion is rotatably mounted to the mating groove along the axis of the first direction. When the set position is reached, the limiting protrusion cooperates with the mating portion to form a connecting structure, thereby limiting the relative position of the two boxes in the first direction, thereby achieving connection. This connection method of the two boxes does not require screw installation and fixation, simplifies assembly, reduces the complexity of user-end installation, and improves installation convenience. The energy storage device can be stacked close to the wall or placed independently. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0030] Figure 1 A schematic structural diagram of a first embodiment of the energy storage device provided by the present utility model;

[0031] Figure 2 for Figure 1 Schematic diagram of the rotational fit of the two boxes;

[0032] Figure 3 for Figure 1 3D exploded diagram of the energy storage device;

[0033] Figure 4 for Figure 1 A schematic structural diagram of an embodiment of a Chinese electrical connection structure;

[0034] Figure 5 for Figure 1 A schematic structural diagram of another embodiment of the electric connection structure;

[0035] Figure 6 This is a structural schematic diagram of the second embodiment of the energy storage device provided by the utility model.

[0036] Description of Figure Numbers:

[0037] 100. Energy storage device; 1. Box; 1a. Power box; 1b. Energy storage box; 11. Box body; 12. End cover; 2. Connecting portion; 21. Limiting protrusion; 22. Second through hole; 3. Matching groove; 31. Matching portion; 32. First through hole; 4. Electrical connection structure; 41. Connector; 51. Stopper; 52. Stop groove; 6. Locking structure; 61. Locking portion; 62. Buckling portion; 7. Decorative buckle plate; a. Cable.

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] It should be noted that if directional indications are involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] Currently, mainstream energy storage device designs utilize modular all-in-one or split-unit designs for both energy storage and conversion to meet load energy requirements. The all-in-one solution offers the advantages of a unified aesthetic and a smaller footprint, aligning with the characteristics of home appliances and gradually becoming a key equipment design option.

[0043] Regarding the integrated energy storage system, the existing solutions are:

[0044] The first type: Modules are stacked and fixed with screws and nuts. The whole can be set up with the corresponding structure to be fixed with the image surface as needed, or the whole can be set up separately without being connected to the wall;

[0045] The second type: Each module is placed against the wall and stacked without being fixed. In order to improve the installation stability, each module is provided with a hanging slot or hanging plate mechanism. The installation wall needs to be equipped with a hook mechanism corresponding to each module to achieve reliable installation.

[0046] In view of this, the present invention provides an energy storage device, which aims to optimize the connection method between different modules and improve the convenience of installation.

[0047] It should be noted that the energy storage device mentioned in the present invention is not limited to power electronic equipment that can only store energy, but can also be other equipment designed for energy storage application scenarios, such as household appliances. The energy storage device can be used as part of the household appliances.

[0048] Please refer to Figures 1 to 3 The energy storage device 100 includes at least two boxes 1 stacked along a first direction, each box 1 is provided with an electrical device, and the electrical devices in the two boxes 1 are electrically connected, one of the boxes 1 is provided with a connecting portion 2 at the end facing the other box 1, and a limiting protrusion 21 is provided on the outer side of the connecting portion 2, and a matching groove 3 is provided at the corresponding end of the other box 1, and a matching portion 31 is provided at the position corresponding to the matching groove 3, the connecting portion 2 and the matching groove 3 are rotated and matched along the axial direction of the first direction, so that when the connecting portion 2 reaches the set position in the matching groove 3, the limiting protrusion 21 cooperates with the matching portion 31 to form a connection structure, which is used to limit the two boxes 1 to be fixed in the first direction.

[0049] In the technical solution of the present utility model, the connecting portion 2 is rotatably mounted to the mating groove 3 along the axis of the first direction. When the connecting portion 2 reaches the set position, the limiting protrusion 21 cooperates with the mating portion 31 to form a connecting structure, thereby limiting the relative position of the two boxes 1 in the first direction, thereby achieving connection. This connection method of the two boxes 1 does not require screw installation and fixation, simplifies assembly, reduces the complexity of user-end installation, and improves installation convenience. The energy storage device 100 can be stacked close to the wall or placed independently.

[0050] It should be noted that the first direction may be a vertical direction or a horizontal direction, and the second direction is a direction intersecting with the first direction in space or on a horizontal plane.

[0051] The present invention does not limit the specific type of the electrical device, which may be a power conversion device, such as an inverter, a hybrid inverter, or an energy storage battery pack device, such as a unit containing a battery.

[0052] In some embodiments, the two boxes 1 can rotate relative to each other in a first direction to drive the connection portion 2 to rotate and engage with the mating groove 3. In this case, the connection portion 2 and the mating groove 3 can both remain fixed to the corresponding box 1, and the box 1 is driven to rotate by an external force to achieve rotational engagement of the connection structure, which is convenient for operation. In other embodiments, the connection portion 2 itself can also be set to rotate relative to the box 1, and the rotational engagement with the mating groove 3 is achieved by driving the connection portion 2 to rotate.

[0053] It should be understood that the set positions described above represent different positions based on different structural forms. Specifically, the matching form of the matching portion 31 and the limiting protrusion 21 is not limited. In one embodiment, the inner side wall of the matching groove 3 forms a limiting groove, and the limiting groove extends along the circumference of the matching groove 3. The limiting groove cooperates with the limiting protrusion 21, and the matching portion 31 includes the limiting groove. In this structure, the limiting protrusion 21 can extend into the limiting groove during the rotation process, thereby achieving matching. At this time, the set position should be the position where the limiting protrusion 21 and the limiting groove are tightly matched and the limiting protrusion 21 can no longer rotate.

[0054] Specifically, in the first embodiment, please refer to Figure 2 and Figure 3 The inner side wall of the matching groove 3 is formed with an internal thread, the limiting groove includes a thread groove formed by the internal thread, the outer side surface of the connecting portion 2 is provided with an external thread, and the threaded protrusion of the external thread forms the limiting protrusion 21. That is, the two boxes 1 are connected by threaded matching. At the middle position of the opposite end surfaces of the two boxes 1, one is provided with a protrusion, which is provided with an external thread, and the other is provided with a recess, which is provided with an internal thread. The connecting portion 2 and the limiting protrusion 21 form an external thread structure, and the matching groove 3 and the matching portion 31 form an internal thread structure. When matched, the connecting portion 2 can extend into the matching groove 3 provided along the first direction of the notch, thereby achieving thread locking during rotation.

[0055] It should be noted that the size and specific orientation of the internal thread structure and the external thread structure need to be determined according to specific design requirements, but the matching positions of the two need to correspond to each other in order to achieve rotational locking.

[0056] It should be noted that the box body 1 and the connecting portion 2 can be integrally die-casted, with threads machined at corresponding positions. The connecting portion 2 can also be manufactured separately and installed on the box body 1. The installation method is not limited.

[0057] In other embodiments, the mating groove 3 is a through groove arranged in the first direction, and a plurality of limiting grooves are formed on the inner wall surface of the box body 1 connected to the mating groove 3 and facing the other box body 1. The plurality of limiting grooves are distributed along the circumferential direction of the mating groove 3 to form a mating portion 31. A notch connecting the mating groove 3 is provided between each two adjacent limiting grooves. The limiting protrusions 21 are provided in plurality corresponding to the plurality of limiting grooves. The connecting member extends into the mating groove 3. The plurality of limiting protrusions 21 can pass through the plurality of notches under the drive of the connecting member to extend into the corresponding box body 1. Rotating one of the box bodies 1 allows the plurality of limiting protrusions 21 and the plurality of limiting grooves to be converted from a staggered state to a state of alignment in the first direction. Loosening the corresponding box body 1 allows the limiting protrusions 21 and the limiting grooves to engage in the first direction. This structure can also achieve rotational hanging cooperation of the two box bodies 1. In this case, the set position should be the position where the limiting protrusions 21 and the limiting grooves are directly opposite each other in the first direction.

[0058] The electrical equipment in the two boxes 1 can be connected through cables. In this embodiment, the energy storage device 100 also includes an electrical connection structure 4, which includes two connectors 41 correspondingly arranged on the two boxes 1. The two connectors 41 are electrically connected to the electrical equipment, and the two connectors 41 are plugged together to achieve electrical connection. The two connectors 41 are corresponding male and female ends that plug in. The cables in the two boxes 1 can be one or more, and can be power cables or communication cables. One end of the multiple cables is connected to the corresponding electrical equipment, and the other end is connected to the connector 41. In a specific embodiment, the cables can be connected to the circuit board assembly or battery assembly in the box 1.

[0059] Considering the plug-in fit of the connector 41, in some embodiments, please refer to Figure 4 The bottom wall of the mating groove 3 defines a first through-hole 32 that communicates with the corresponding housing 1. The middle portion of the connecting portion 2 defines a second through-hole 22 that communicates with the corresponding housing 1. The two connectors 41 are plugged and mated together through the first through-hole 32 and the second through-hole 22. When the connecting portion 2 and the mating groove 3 are threadedly engaged, a passage for cables or connectors 41 to pass through is formed between the external and internal threads, thereby achieving an electrical connection between the two housings 1. Specifically, the two connectors 41 can be plugged into the passage formed by the first through-hole 32 and the second through-hole 22.

[0060] In other embodiments, please refer to Figure 5, the two boxes 1 are provided with communication holes on their sides in the second direction; at least one of the two connectors 41 can extend from the corresponding communication hole for plug-in connection. That is, the connector 41 or the cable can pass through the corresponding communication hole for electrical connection. With this arrangement, the rotational connection of the two boxes 1 is carried out in the first direction, and the plug-in of the connector 41 can be carried out from the side of the box 1. There is sufficient space for the arrangement of various components, and only the layout of the cables and connectors 41 needs to be adjusted accordingly. Specifically, the two boxes 1 can be rotated and fixed first, and then the connectors 41 can be plugged into the sides of the boxes 1 to achieve electrical connection.

[0061] Furthermore, one of the connectors 41 can be set in the corresponding connecting hole, and the other connector 41 and the cable connected thereto can extend out of the corresponding connecting hole to be plugged into one of the connectors 41 to complete the matching.

[0062] Considering the anti-rotation after the two boxes 1 are matched, in some embodiments, please refer to Figure 1 The energy storage device 100 further includes a stop structure, which includes a stop member 51 and a stop groove 52. The stop member 51 is movably mounted to the outside of one of the boxes 1 along a first direction. The stop member 51 can be moved to protrude from the end face of the corresponding box 1 toward the other box 1. The stop groove 52 extends along the first direction and is arranged on the outside of the other box 1. The stop groove 52 is open on one side of the stop member 51 to allow the stop member 51 to be movably inserted when the two boxes 1 are fixedly connected. In the initial state, the end of the stop member 51 at least does not protrude from the corresponding end face of the box body 1, and can be flush with the corresponding end face of the box body 1, or have a certain distance therefrom, so as to avoid interference when the two box bodies 1 are rotated and matched. When the two box bodies 1 are rotated and matched, that is, after the limiting protrusion 21 and the matching portion 31 are matched, the stop member 51 is driven to move along the first direction, so that it can be inserted into the stop groove 52, and the anti-rotation fit is achieved by relying on the limiting effect of the stop member 51 and the wall of the stop groove 52.

[0063] It should be noted that the present invention does not limit the form in which the stopper 51 is movable. It can be driven by an elastic member or manually driven by a user, and a corresponding stop block is provided to limit the initial position of the stopper 51.

[0064] It should be noted that a boss can be separately provided on the outside of the box body 1 for the installation of the stop member 51, or the outer wall of the box body 1 can be partially hollowed out for the installation of the stop member 51. The stop groove 52 can be a groove structure opened on the outer wall of the box body 1. In this embodiment, one of the corners of the box body 1 is recessed into a notch with a V-shaped or U-shaped cross-section to form the stop groove 52.

[0065] For further information, please refer to Figure 3 At least one of the boxes 1 includes a box body 11 and an end cover 12. The box body 11 is open on one side along the second direction, and electrical equipment is installed in the box body 11. The end cover 12 is installed on the open side of the box body 11 and is removable. Opening the end cover 12 facilitates the placement of electrical equipment inside the box body 11. At the same time, the two can form a sealed space to protect the electrical equipment. When the two boxes 1 are connected into one by the connecting structure, the end cover 12 can be removed to facilitate the arrangement of cables or connectors 41 to achieve electrical connection.

[0066] It should be understood that both boxes 1 may consist of a box body 11 and an end cover 12 , or at least one box 1 may consist of only a box body 11 , which can also achieve the corresponding functions. The present invention does not limit this.

[0067] To enhance the secure fit of the two housings 1, the energy storage device 100 further includes a locking structure 6 comprising a locking portion 61 and a snap-fit ​​portion 62 that cooperate with each other. The locking portion 61 and the snap-fit ​​portion 62 are provided on each of the two housings 1 to securely fit the two housings 1. When the two housings 1 are rotated together, the locking structure 6 secures the two housings 1 in a first direction, thereby ensuring relative fixation and overcoming any looseness caused by design gaps or manufacturing errors.

[0068] It should be noted that the present invention does not limit the specific form of the locking structure 6. In one embodiment, the locking portion 61 and the buckling portion 62 are configured as a buckle hook and a buckle, respectively, and are locked by mechanical locking. In other embodiments, the locking portion 61 and the buckling portion 62 are configured as a buckle and a slot, respectively, and are locked by elastic deformation.

[0069] It should be understood that the type of electrical equipment varies depending on the operating requirements. For example, the electrical equipment may be a modular power conversion device. If it is a power conversion device, its energy source may be DC power generated by a photovoltaic panel. When the other box 1 contains a battery pack, the energy source of the power conversion device may be the DC power stored by the battery pack (converting the chemical energy of the battery into electrical energy). The energy source of the power conversion device may also be AC ​​power from the grid, and the output load may be a household or commercial load. For example, the electrical equipment may be an energy storage battery pack device, which includes a battery pack, related circuit boards (with battery management and energy conversion functions), etc.

[0070] In one configuration, the electrical devices in the two boxes 1 are respectively a power conversion device and an energy storage battery pack device, and the energy storage battery pack device serves as one of the energy sources of the power conversion device.

[0071] In another setting mode, the electrical equipment in the two boxes 1 are all energy storage battery pack equipment, that is, the two boxes 1 are the same, realizing stacked installation of the equipment.

[0072] It should be understood that, considering different working conditions, the number of boxes 1 provided in the energy storage device 100 may be different. For example, the energy storage device 100 may include only two boxes 1. Figure 1 In the first embodiment, the two boxes 1 correspond to different electrical equipment, which can be specifically set as an energy storage battery pack device and a power conversion device. The box 1 corresponding to the power conversion device is the power box 1a, and the box 1 corresponding to the energy storage battery pack device is the energy storage box 1b. Battery assemblies and circuit board assemblies are arranged in the corresponding boxes 1.

[0073] Under some working conditions, the energy storage device 100 includes a plurality of boxes 1 stacked along a first direction, and the connection structure is provided between each two adjacent boxes 1. That is, the plurality of boxes 1 can be rotatably connected to form a whole, and the electrical devices in at least some of the boxes 1 are different, thereby achieving different functions. For example, the electrical devices in two adjacent boxes 1 are respectively configured as a power conversion device and an energy storage battery pack device. Please refer to Figure 6 In the second embodiment, the energy storage device 100 comprises multiple stacked modular units. Specifically, the electrical equipment comprises multiple energy storage battery packs and a power conversion device. Accordingly, a power box 1a houses multiple energy storage boxes 1b. It should be understood that modular units of other electrical devices are also applicable to the present invention.

[0074] In addition, please refer to Figure 1 , decorative gusset plates 7 are installed on two opposite sides of each box body 1 along the second direction. The decorative gusset plates 7 play a role in aesthetics and safety protection. For example, according to the heat dissipation requirements of the electrical equipment, heat dissipation structures such as fans and liquid cooling pipes may be installed outside the box body 1. The decorative gusset plates 7 separate these heat dissipation structures from the user to prevent burns or frostbite.

[0075] It should be noted that, when the energy storage device 100 is placed against a wall, a decorative gusset plate 7 may be provided only on the side of the box body 1 exposed to the outside.

[0076] It should be understood that in order to prevent the decorative gusset plate 7 from affecting the heat dissipation effect of the box body 1, the gusset plate is set to a hollow plate with multiple holes opened on the surface of the plate to facilitate air circulation.

[0077] The present invention does not limit the placement environment of the energy storage device 100. In some embodiments, the energy storage device 100 can be stacked against a wall and independent of the wall. In some embodiments, at least one of the boxes 1 is provided with a wall fixing mechanism to lock the energy storage device 100 to the wall, thereby improving the installation stability of the energy storage device 100.

[0078] The present invention does not limit the specific form of the wall fixing mechanism. For example, a hanging slot or hanging plate may be provided on the box 1, and a corresponding hook may be provided on the wall. The wall fixing mechanism may be provided on only one box 1 or on both boxes 1.

[0079] by Figure 1 The embodiment of the present invention is used as an example to illustrate the matching of the box body 1. The assembly method of the two boxes 1 is as follows:

[0080] The first method: place the box 1 at the bottom on a flat surface, and after placing the cushion material, place the box 1 at the top so that the two boxes 1 are padded a certain distance apart, and then pull the two connectors 41 in the two boxes 1 out from the corresponding first through-holes 32 and second through-holes 22 for plugging. After the plugging is completed, align the center positions of the two boxes 1, take out the cushion material, and drive the box 1 at the top to rotate. When it rotates to the set position (it can also be a preset rotation angle), drive the stopper 51 to fall and insert it into the stop groove 52 for fixation, and then lock the buckle to complete the assembly.

[0081] The second method: the box body 1 at the bottom is placed on a flat surface, and then the threaded opening of the other box body 1 is aligned and rotated in a certain direction to the set position, driving the stopper 51 to fall and insert into the stop groove 52 for fixation, and then the buckle is locked, and then the end cover 12 is opened to connect the connector 41 to achieve electrical connection and complete the assembly.

[0082] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An energy storage device, characterized in that: It comprises at least two boxes stacked along a first direction, each box is provided with an electrical device, and the electrical devices in the two boxes are electrically connected; A connecting portion is provided at the end of one of the boxes facing the other box, and a limiting protrusion is provided on the outer side surface of the connecting portion. A matching groove is provided at the corresponding end of the other box, and a matching portion is provided at the position corresponding to the matching groove. The connecting portion and the matching groove are rotated and matched along the axial direction of the first direction, so that when the connecting portion reaches the set position in the matching groove, the limiting protrusion cooperates with the matching portion to form a connecting structure, which is used to limit the two boxes to be fixed in the first direction.

2. The energy storage device according to claim 1, wherein The two boxes can rotate relative to each other along a first direction to drive the connecting portion to rotate and cooperate with the matching groove.

3. The energy storage device according to claim 1 or 2, characterized in that: A limiting groove is formed on the inner side wall of the matching groove, and the limiting groove extends along the circumference of the matching groove, and the limiting groove is matched with the limiting protrusion; The matching portion includes the limiting groove.

4. The energy storage device according to claim 3, characterized in that The inner side wall of the matching groove is formed with an internal thread, and the limiting groove includes a thread groove formed by the internal thread; An external thread is provided on the outer side surface of the connecting portion, and a thread protrusion of the external thread forms the limiting protrusion.

5. The energy storage device according to claim 1, wherein: The energy storage device further includes an electrical connection structure, which includes two connectors correspondingly arranged on the two boxes. The two connectors are electrically connected to the electrical equipment respectively, and the two connectors are plugged in and matched to achieve electrical connection.

6. The energy storage device according to claim 5, characterized in that A first through hole communicating with the corresponding box body is formed on the bottom wall of the matching groove, and a second through hole communicating with the corresponding box body is formed in the middle of the connecting portion; The two connectors are plugged and matched through the first through hole and the second through hole.

7. The energy storage device according to claim 6, characterized in that The sides of the two boxes in the second direction are both provided with communication holes; At least one of the two connectors can extend from the corresponding communicating hole for plug-in mating.

8. The energy storage device according to claim 1, wherein: The energy storage device further includes a stop structure, and the stop structure includes: a stopper movably mounted to the outside of one of the boxes along a first direction, the stopper being movable to protrude from the end surface of the corresponding box toward the other box; and The stop groove extends along the first direction and is arranged outside the other box body. The stop groove is opened toward the side of the stop member so as to allow the stop member to be movably inserted when the two boxes are fixedly connected.

9. The energy storage device according to claim 1, wherein: At least one of the boxes comprises: a box body, wherein one side of the box body along the second direction is open, and an electrical device is arranged in the box body; and The end cover is arranged on the open side of the box body and is detachably installed.

10. The energy storage device according to claim 1, wherein: The energy storage device further comprises a locking structure, which comprises a locking portion and a buckling portion that cooperate with each other. The locking portion and the buckling portion are respectively provided on the two boxes so that the two boxes are locked and matched.

11. The energy storage device according to claim 1, wherein: The energy storage device includes a plurality of boxes stacked along a first direction, and the connection structure is provided between every two adjacent boxes.

12. The energy storage device according to claim 10, wherein: The electrical equipment in the two adjacent boxes are respectively configured as power conversion equipment and energy storage battery pack equipment.

13. The energy storage device according to claim 1, wherein: Decorative gusset plates are installed on two opposite sides of each box along the second direction.

14. The energy storage device according to claim 1, wherein: A wall fixing mechanism is provided on the outside of at least one of the boxes so as to lock the energy storage device on the wall.

Images