Frame assembly, battery swap station or energy storage station, and assembly method of frame assembly

Abstract

The present invention discloses a frame assembly, a battery swap station or an energy storage station, and an assembly method of a frame assembly. The frame assembly includes: a first connecting beam, a second connecting beam, and an adapter. The first connecting beam extends along a first direction, and the second connecting beam extends along a second direction. The first direction and the second direction form an angle. The adapter is fixed to the first surface of the first connecting beam. The adapter has at least one connecting piece, and the connecting piece is fixed to the end of the second connecting beam. The extension direction of the connecting piece is the same as the extension direction of the second connecting beam, so as to realize the connection between the connecting beams with different extension directions. According to the angle between the two connecting beams, an adapter with connecting pieces with different extension directions can be selected, so that the fixation between two connecting beams at any angle can be satisfied, thereby realizing the rapid construction of the box frame of the battery swap station. This frame assembly provides the possibility and convenience of capacity expansion in different directions for the box frame of the battery swap station.

Description

Technical Field

[0001] The present invention relates to the field of vehicle charging, and in particular to a frame assembly, a battery swap station or an energy storage station, and an assembling method of the frame assembly. Background Art

[0002] The battery swap station is used to replace batteries in electric vehicles. After the electric vehicle enters the battery swap station and is reliably positioned, the battery swap equipment will replace the electric vehicle. Specifically, the battery swap cart removes the battery to be replaced from the electric vehicle and places it on the palletizer, which then transports the battery to be replaced to the charging rack; the palletizer takes the charged new battery from the charging rack and places it on the battery swap cart, which then transports the new battery to the predetermined location and installs it on the electric vehicle.

[0003] At present, battery swap stations are generally of integral container structure. For example, the patent application with publication number CN107503531A discloses a container battery swap station, which uses a container as a box frame, and transforms and installs equipment inside the box frame to achieve the battery swap function. The flexibility of this structure of battery swap station is poor. Due to the integrity of the box frame, its scalability is insufficient. In addition, it is difficult to repair the container by simply replacing parts after it is partially damaged, and the repair cost is high. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of insufficient structural scalability and high maintenance cost of battery swap stations in the prior art, and to provide a frame assembly, a battery swap station or an energy storage station, and an assembly method of the frame assembly.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A frame assembly, comprising:

[0007] a first connecting beam extending along a first direction;

[0008] a second connecting beam, the second connecting beam extending along a second direction, the first direction and the second direction forming an angle;

[0009] The adapter is fixed to the first surface of the first connecting beam, and the adapter has at least one connecting piece, and the connecting piece is fixed to the end of the second connecting beam.

[0010] In this solution, the first connecting beam and the second connecting beam extend in different directions, and the two are connected by an adapter, wherein the extension direction of the connecting piece is the same as the extension direction of the second connecting beam, thereby realizing the connection between the connecting beams with different extension directions. According to the angle between the two connecting beams, an adapter with connecting pieces with different extension directions can be selected to facilitate installation and stable connection, so that the fixation between two connecting beams at any angle can be satisfied, thereby realizing the rapid construction of the box frame of the battery swap station. At the same time, this frame assembly provides the possibility and convenience of expansion of the box frame of the battery swap station in different directions. In addition, since the box frame of the battery swap station is assembled from frame assemblies, etc., when the box frame of the battery swap station is partially damaged, the frame assemblies, etc. can be disassembled and the damaged parts can be replaced, which can improve the maintenance convenience of the battery swap station and reduce the maintenance cost.

[0011] Preferably, the second connecting beam has a hollow inner cavity, an end portion of the second connecting beam is provided with an opening communicating with the inner cavity, and the connecting piece is at least partially inserted into the inner cavity through the opening.

[0012] In this solution, the connecting piece is passed through the inside of the second connecting beam, and the connection reliability is high. Before the connecting piece and the second connecting beam are completely fixed, simple positioning between the two can be achieved, which is convenient when building the frame.

[0013] Preferably, the second connecting beam has a groove penetrating along the axis, and the connecting piece is cooperatively attached to the inner wall of the groove.

[0014] In this solution, the groove fits the shape of the second connecting piece, which is convenient for positioning, and the gap between the groove and the connecting piece in the thickness direction and width direction of the connecting piece is small, so it is not easy to shake. In other embodiments, the second connecting beam can also be a hollow square tube, and the connecting piece can be fitted on one of the multiple inner walls of the hollow square tube.

[0015] Preferably, the first surface of the first connecting beam has two opposite connecting plates extending along the second direction, and a connecting groove for the second connecting beam to be plugged in and out is formed between the two connecting plates; the connecting piece is located in the connecting groove.

[0016] In this solution, during the process of inserting the connecting piece into the second connecting beam, the connecting groove can assist in positioning the second connecting beam. When the second connecting piece is fully inserted into the second connecting beam, the second connecting beam is partially inserted into the connecting groove. Moreover, during the process of installing the adapter to the first connecting beam, the connecting groove corresponding to the adapter also plays an auxiliary positioning role. Specifically, the first connecting beam can be an I-beam. In addition, the above-mentioned connecting groove can also be formed by processing (for example, cutting) the side of the first connecting beam. The connecting groove formed in this way can be only provided in a part of the first connecting beam (for example, the position for connecting with the second connecting beam), that is, the connecting groove may not run through the entire extension direction of the first connecting beam.

[0017] Preferably, the end plane of the second connecting beam matches with the first surface of the first connecting beam; the second connecting beam is inserted into the connecting groove and matches with the opposite surfaces of the two connecting plates.

[0018] In this solution, the end plane of the second connecting beam cooperates with the first connecting beam, which is conducive to the stable connection between the two connecting beams. The connecting plate cooperates with the second connecting beam, so that the fixation of the second connecting beam is relatively stable.

[0019] Preferably, the second connecting beam and the connecting sheet and / or the second connecting beam and the connecting plate of the first connecting beam are connected by self-piercing riveting or rivet-free connection.

[0020] In this solution, it is more convenient to use self-piercing riveting or rivet-free connection, which is convenient for on-site construction, and the connection method is reliable, which is conducive to the stable connection between the first connecting beam and the second connecting beam, and is conducive to increasing the shear resistance at the connection between the first connecting beam and the second connecting beam.

[0021] Preferably, the adapter has a socket for the second connecting beam to be plugged in and out, and the connecting piece extends from the bottom of the socket along the second direction.

[0022] In this solution, the connecting slot of the adapter itself can assist in positioning the second connecting beam, facilitating the connection between the second connecting beam and the adapter. When the connecting piece is inserted into the interior of the second connecting beam, the end of the second connecting beam is inserted into the connecting slot.

[0023] Preferably, the adapter includes a first connecting piece extending along the first direction, a second connecting piece extending along the second direction, and two opposite positioning pieces extending along the second direction on opposite sides of the first connecting piece, the first connecting piece is fixed to the first surface of the first connecting beam; the interval between the two positioning pieces constitutes a connecting slot; the second connecting piece is located in the connecting slot.

[0024] In this solution, the adapter can be conveniently fixed to the first connecting beam through the first connecting plate, which also facilitates the positioning of the adapter. The connecting slot is formed by two positioning plates. The adapter is an integrated sheet metal part, which is easy to form and saves costs. The sheet-shaped positioning plate is easy to rivet.

[0025] Preferably, the end plane of the second connecting beam fits with the first surface of the first connecting beam; the second connecting beam is inserted into the plug-in slot and fits with the opposite surfaces of the two positioning plates; the second connecting plate is at least partially inserted into the inner cavity of the second connecting beam.

[0026] In this solution, the end plane of the second connecting beam cooperates with the first connecting beam, which is conducive to the stable connection between the two connecting beams. The positioning piece cooperates with the second connecting beam, so that the fixation of the second connecting beam is relatively stable.

[0027] Preferably, the second connecting beam and the second connecting plate and / or the second connecting beam and the positioning plate are connected by self-piercing riveting or rivet-free connection.

[0028] In this solution, it is more convenient to use self-piercing riveting or rivet-free connection, which is convenient for on-site construction, and this connection method is reliable and conducive to a stable connection between the first connecting beam and the second connecting beam.

[0029] Preferably, the adapter has a first connecting piece extending along the first direction, and a second connecting piece extending along the second direction, the first connecting piece is provided with a first reinforcing rib extending along the first direction, and / or the second connecting piece is provided with a second reinforcing rib extending along the second direction.

[0030] In this solution, the first reinforcing rib can improve the strength of the first connecting piece, thereby improving the load-bearing and impact resistance of the first connecting piece, especially for loads perpendicular to the first direction; similarly, the second reinforcing rib can also improve the strength of the second connecting piece.

[0031] Preferably, the first direction is perpendicular to the second direction.

[0032] In this solution, the first connecting beam and the second connecting beam are connected perpendicularly to each other, which is suitable for most construction needs. The first direction and the second direction can also be formed at other angles to meet different construction needs.

[0033] Preferably, one or more of the following connection methods are used between the first connecting beam and the adapter, and between the second connecting beam and the adapter: riveting, welding, bonding, and bolt connection.

[0034] In this solution, the connection method between the first connection beam and the adapter, and the connection method between the second connection beam and the adapter can be the same, or different connection methods can be selected according to actual conditions.

[0035] A battery swap station or energy storage station, comprising the above frame assembly.

[0036] In this solution, the main body of the battery swap station or energy storage station is a frame structure, which is constructed by multiple connecting beams and is constructed using the above-mentioned frame components. Therefore, it is more convenient to assemble the battery swap station or energy storage station, and the structure of the battery swap station or energy storage station is also more reliable.

[0037] A method for assembling the frame assembly as described above comprises the following steps:

[0038] Fixing the adapter on the first surface of the first connecting beam;

[0039] The end surface of the second connecting beam is abutted against the first surface, and the connecting piece is inserted into the inner cavity of the second connecting beam to connect and fix.

[0040] In this solution, the assembly method enables the connection of two connecting beams with different extension directions, and the positioning is convenient during installation and the connection is reliable, so it is conducive to the rapid construction of frame components, especially the construction of large assembly structures.

[0041] Preferably, the connecting piece is inserted into the inner cavity of the second connecting beam for connection and fixation, including fixing the connecting piece to the end of the second connecting beam by self-piercing riveting or rivet-free connection.

[0042] In this solution, the connecting piece is inserted into the second connecting beam, and the connection reliability is high. Before the connecting piece and the second connecting beam are completely fixed, simple positioning between the two can be achieved, which is convenient when building the frame. The construction using self-piercing riveting or rivet-free connection is convenient, the fixation is reliable, and the shear resistance is strong.

[0043] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0044] The positive and progressive effect of the present invention is that the frame assembly of the present invention can make two connecting beams extending in different directions conveniently connected and reliably fixed, so that different connection needs can be met when building the frame structure. The battery swap station of the present invention can be built conveniently and quickly by utilizing the above-mentioned frame assembly, thereby reducing the project cycle and cost. The assembly method of the present invention can meet the fixation between two connecting beams at any angle, thereby realizing the rapid construction of the box frame of the battery swap station. At the same time, this frame assembly provides the possibility and convenience of expansion of the box frame of the battery swap station in different directions. In addition, since the box frame of the battery swap station is assembled from frame assemblies, etc., when the box frame of the battery swap station is partially damaged, the frame assembly, etc. can be disassembled and the damaged parts can be replaced, which can improve the maintenance convenience of the battery swap station and reduce the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a partial schematic diagram of the frame assembly of Example 1 of the present invention.

[0046] Figure 2 This is a schematic diagram of the exploded view of the frame assembly of Example 1 of the present invention.

[0047] Figure 3 This is a schematic structural diagram of the adapter of the frame assembly of Example 1 of the present invention.

[0048] Figure 4 This is a schematic diagram of the framework structure of the battery swap station according to Example 1 of the present invention.

[0049] Figure 5 This is a schematic cross-sectional view of the second connecting beam of the frame assembly of Example 1 of the present invention.

[0050] Figure 6 This is a schematic diagram of the exploded view of the frame assembly of Example 2 of the present invention.

[0051] Figure 7 This is a schematic diagram of the structure of the assembly method of Example 3 of the present invention.

[0052] Description of Reference Numerals

[0053] First connecting beam 1

[0054] Connection slot 11

[0055] Connecting plate 12

[0056] Second connecting beam 2

[0057] Lumen 21

[0058] Groove 22

[0059] Adapter 3

[0060] First connecting piece 31

[0061] Second connecting piece 32

[0062] Second reinforcement rib 321

[0063] Positioning piece 33

[0064] Socket 34

[0065] Connecting piece 35 DETAILED DESCRIPTION

[0066] Example 1

[0067] This embodiment provides a battery replacement station for electric vehicles. Figure 4 As shown, the main body of the battery swap station is a frame structure, which is constructed by multiple connecting beams. Specifically, the battery swap station includes a frame assembly.

[0068] In this embodiment, if Figure 1 and Figure 2 As shown, the frame assembly includes: a first connecting beam 1, a second connecting beam 2 and an adapter 3, wherein the first connecting beam 1 extends along a first direction, the second connecting beam 2 extends along a second direction, the first direction and the second direction form an angle, and the adapter 3 includes a first connecting piece 31 extending along the first direction and a second connecting piece 32 extending along the second direction, the first connecting piece 31 is fixed on the first connecting beam 1, and the second connecting piece 32 is fixed to the end of the second connecting beam 2.

[0069] The first connecting beam 1 and the second connecting beam 2 extend in different directions, and the two are connected by an adapter 3, wherein the first connecting piece 31 is fixed relative to the first connecting beam 1 in the same extension direction as the first connecting beam 1, and the second connecting piece 32 is fixed relative to the second connecting beam 2 in the same extension direction as the first connecting beam 2, thereby realizing the connection between the connecting beams in different extension directions. According to the angle between the two connecting beams, an adapter 3 with two connecting pieces forming corresponding angles can be selected to facilitate installation and stable connection, so that the fixation between the two connecting beams at any angle can be satisfied, thereby realizing the rapid construction of the battery swap station and making the structure of the battery swap station more stable. At the same time, this frame assembly provides the possibility and convenience of expansion for the battery swap station box frame in different directions. In addition, since the battery swap station box frame is assembled by frame assemblies, etc., when the battery swap station box frame is partially damaged, the frame assemblies, etc. can be disassembled and the damaged parts can be replaced, which can improve the maintenance convenience of the battery swap station and reduce the maintenance cost. It can be understood that the above-mentioned frame assembly can also be applied to the construction of energy storage stations.

[0070] The second connecting beam 2 has a hollow inner cavity 21, and an opening communicating with the hollow inner cavity 21 is formed at the end of the second connecting beam 2, and the second connecting piece 32 is at least partially inserted into the hollow inner cavity 21 through the opening. The second connecting piece 32 is inserted into the interior of the second connecting beam 2, and the connection reliability is high. Before the second connecting piece 32 and the second connecting beam 2 are completely fixed, simple positioning between the two can be achieved, which is convenient when building the frame. In other preferred embodiments, the second connecting piece 32 can also be connected to the second connecting beam 2 on the outside of the second connecting beam 2.

[0071] like Figure 5 As shown, the second connecting beam 2 has a groove 22 that runs through the axis, and the second connecting piece 32 is cooperatively arranged in the groove 22. The shapes of the groove 22 and the second connecting piece 32 are relatively close, which is convenient for positioning. The gap between the groove 22 and the second connecting piece 32 in the thickness direction of the second connecting piece 32 is small, and it is not easy to shake. More preferably, the thickness and width of the second connecting piece 32 are adapted to the internal dimensions of the groove 22, wherein the thickness of the second connecting piece 32 is preferably less than 3 mm. In other embodiments, the second connecting beam 2 can also be a hollow square tube, and the second connecting piece 32 can be fitted on the inner wall of the hollow square tube.

[0072] like Figure 3 As shown, the adapter 3 has a socket 34 for the second connecting beam 2 to be plugged in, and the second connecting piece 32 extends outward from the socket 34. The socket 34 is formed by the adapter 3, and the side of the adapter 3 different from the socket 34 can be connected to the side of the first connecting beam 1, especially suitable for the first connecting beam 1 with a flat side. In the process of inserting the second connecting piece 32 into the second connecting beam 2, the socket 34 can assist in positioning the second connecting beam 2. When the second connecting piece 32 is fully inserted into the interior of the second connecting beam 2, the second connecting beam 2 is partially inserted into the socket 34.

[0073] The adapter 3 includes two oppositely arranged positioning pieces 33, the positioning pieces 33 extend along the second direction, and the interval between the two positioning pieces 33 constitutes a connection slot 34. The connection slot 34 is formed by the two positioning pieces 33. Preferably, the adapter 3 can be an integrally formed sheet metal part, which is convenient to form and saves costs, and the sheet-shaped positioning pieces 33 are easy to rivet.

[0074] The end plane of the second connecting beam 2 is parallel to the first direction, so that the end plane of the second connecting beam 2 fits with the first connecting beam 1 or the first connecting piece 31. The end plane of the second connecting beam 2 fits with the first connecting beam 1, which is conducive to the positioning and stable connection of the first connecting beam 1 and the second connecting beam 2. In addition, the positioning piece 33 cooperates with the second connecting beam 2, so that the fixation of the second connecting beam 2 is more stable.

[0075] See also Figure 3As shown, the first connecting piece 31 is provided with a first reinforcing rib extending along the first direction, and the second connecting piece 32 is provided with a second reinforcing rib 321 extending along the second direction. The first reinforcing rib can improve the strength of the first connecting piece 31, thereby improving the bearing and impact resistance of the first connecting piece 31, especially for loads perpendicular to the first direction; similarly, the second reinforcing rib 321 can also improve the strength of the second connecting piece 32.

[0076] As a preferred embodiment, the edge of the first reinforcing rib has a first bending portion, which constitutes the first reinforcing rib. In addition, the edge of the second reinforcing rib 321 has a second bending portion, which constitutes the second reinforcing rib 321. The first bending portion and the second bending portion are formed on the edges of the first reinforcing rib and the second reinforcing rib 321, which improves the strength and prevents the edges from cutting hands, thereby improving the safety of the adapter 3.

[0077] In this embodiment, the first direction is perpendicular to the second direction, and the first connecting beam 1 and the second connecting beam 2 are connected perpendicularly to each other, which is suitable for most construction needs. The first direction and the second direction can also be formed at other angles, generally between 45-90 degrees, to meet different construction needs. Accordingly, the end of the second connecting beam 2 is also trimmed to a corresponding angle so that the end plane of the second connecting beam 2 can fit the first connecting piece 31 or the side of the first connecting beam 1.

[0078] One or more of the following connection methods are used between the first connecting beam 1 and the adapter 3, and between the second connecting beam 2 and the adapter 3: riveting, welding, bonding, and bolt connection. Preferably, the second connecting beam 2 and the second connecting plate 32 are connected by self-piercing riveting or rivet-free connection. It is convenient to use self-piercing riveting or rivet-free connection, which is convenient for on-site construction, and the connection method is reliable, which is conducive to the stable connection between the first connecting beam and the second connecting beam, and is conducive to increasing the shear resistance at the connection between the first connecting beam and the second connecting beam. The connection method between the first connecting beam 1 and the adapter 3, and the connection method between the second connecting beam 2 and the adapter 3 can be the same, or different connection methods can be selected according to actual conditions.

[0079] Example 2

[0080] This embodiment provides a frame assembly, which is basically the same as the frame assembly of embodiment 1, except that in this embodiment, Figure 6As shown, the side of the first connecting beam 1 is provided with a connecting groove 11 for the second connecting beam 2 to be inserted and matched, and the adapter 3 is at least partially arranged in the connecting groove 11. Specifically, the first surface of the first connecting beam 1 is provided with two connecting plates 12 extending in the second direction opposite to each other, and the connecting groove 11 for the second connecting beam 2 to be inserted and matched is formed between the two connecting plates 12; the connecting plate is located in the connecting groove and fixed to the first surface of the first connecting beam 1. The second connecting beam 2 can be inserted into the connecting groove 11, the bottom surface of the connecting groove 11 faces the direction of the second connecting beam 2, the end of the second connecting beam 2 can touch the bottom surface of the connecting groove 11, and the two side walls of the connecting groove 11 (i.e., the connecting plates 12) can be matched with the outer side walls of the second connecting beam 2, so as to facilitate the positioning of the second connecting beam 2 and consolidate the connection between the first connecting beam 1 and the second connecting beam 2. Moreover, the connecting groove 11 also facilitates the positioning between the first connecting beam 1 and the adapter 3.

[0081] The side of the first connecting beam 1 has two connecting plates 12 arranged opposite to each other, and the space between the two connecting plates 12 constitutes a connecting groove 11. In this embodiment, the first connecting beam 1 can be an I-beam, so two positioning plates 12 can be provided on the same outer side of the first connecting beam 1 to accommodate the adapter 3 and the end of the second connecting beam 2. In addition, the connecting groove 11 can also be formed by processing (for example, cutting) the first side of the first connecting beam 1. The connecting groove 11 formed in this way can be only provided in a part of the first connecting beam 1 (for example, the position for connecting with the second connecting beam 2), that is, the connecting groove 11 may not run through the entire extension direction of the first connecting beam 1.

[0082] In this embodiment, the adapter 3 may have only one connecting piece 35 − extending along the second direction, and the second connecting beam 2 is connected to the adapter 3 via the connecting piece 35 .

[0083] It can be understood that the frame assembly in Example 2 and the frame assembly in Example 1 can be simultaneously applied to different locations of the same frame structure or the same battery swap station or energy storage station.

[0084] Example 3

[0085] This embodiment provides an assembly method of a frame assembly, which can be applied to the frame assembly in Embodiment 1 or 2. Figure 7 As shown, the assembly method comprises the following steps:

[0086] Fixing the adapter 3 on the first surface of the first connecting beam 1;

[0087] The end surface of the second connecting beam 2 is abutted against the first surface, and the connecting piece 35 is inserted into the inner cavity 21 of the second connecting beam 2 to connect and fix.

[0088] The assembly method enables the connection of two connecting beams with different extension directions, and is convenient for positioning during installation and reliable for connection, thus facilitating rapid construction of frame components, especially large assembly structures.

[0089] As a preferred embodiment, the connecting piece is inserted into the inner cavity of the second connecting beam for connection and fixation, including fixing the connecting piece to the end of the second connecting beam by self-riveting or rivet-free connection.

[0090] The connecting piece 35 is inserted into the second connecting beam 2, and the connection reliability is high. Before the connecting piece 35 and the second connecting beam 2 are completely fixed, simple positioning between the two can be achieved, which is convenient when building the frame. The construction using self-riveting or rivet-free connection is convenient and the fixation is reliable.

[0091] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A frame assembly, characterized in that: The frame assembly comprises: a first connecting beam extending along a first direction; a second connecting beam, the second connecting beam extending along a second direction, the first direction and the second direction forming an angle; An adapter, fixed to the first surface of the first connecting beam, the adapter having at least one connecting piece, and the connecting piece is fixed to the end of the second connecting beam; The adapter comprises a first connecting piece extending along the first direction, a second connecting piece extending along the second direction, and two opposite positioning pieces extending along the second direction on opposite sides of the first connecting piece, the first connecting piece being fixed to the first surface of the first connecting beam; the interval between the two positioning pieces forming a connecting slot; the second connecting piece being located in the connecting slot; The first direction is perpendicular to the second direction.

2. The frame assembly according to claim 1, characterized in that The second connecting beam has a hollow inner cavity, an end of the second connecting beam is provided with an opening communicating with the inner cavity, and the connecting piece is at least partially inserted into the inner cavity through the opening.

3. The frame assembly according to claim 2, characterized in that The second connecting beam has a groove penetrating along the axis, and the connecting piece is cooperatively attached to the inner wall of the groove.

4. The frame assembly according to claim 2, characterized in that The first surface of the first connecting beam has two connecting plates that are opposite to each other and extend along the second direction, and a connecting groove for the second connecting beam to be plugged in and matched is formed between the two connecting plates; the connecting piece is located in the connecting groove.

5. The frame assembly according to claim 4, characterized in that The end plane of the second connecting beam matches with the first surface of the first connecting beam; the second connecting beam is inserted into the connecting groove and matches with the opposite surfaces of the two connecting plates.

6. The frame assembly according to claim 5, characterized in that The second connecting beam and the connecting piece and / or the second connecting beam and the connecting plate of the first connecting beam are connected by self-piercing riveting or rivet-free connection.

7. The frame assembly according to claim 2, characterized in that The adapter has a socket for the second connecting beam to be plugged in and matched with, and the connecting piece extends from the bottom of the socket along the second direction.

8. The frame assembly of claim 1, wherein: The end plane of the second connecting beam is in contact with the first surface of the first connecting beam; the second connecting beam is inserted into the connecting slot and is in contact with the opposite surfaces of the two positioning pieces; the second connecting piece is at least partially inserted into the inner cavity of the second connecting beam.

9. The frame assembly according to claim 8, characterized in that The second connecting beam and the second connecting plate and / or the second connecting beam and the positioning plate are connected by self-piercing riveting or rivet-free connection.

10. The frame assembly according to claim 4, wherein: The adapter has a first connecting piece extending along the first direction and a second connecting piece extending along the second direction, the first connecting piece is provided with a first reinforcing rib extending along the first direction, and / or the second connecting piece is provided with a second reinforcing rib extending along the second direction.

11. A battery swap station or energy storage station, characterized in that: The battery swap station or energy storage station comprises a frame assembly as described in any one of claims 1-10.

12. A method for assembling the frame assembly according to any one of claims 1 to 10, characterized in that: The steps include: Fixing the adapter on the first surface of the first connecting beam; The end surface of the second connecting beam is abutted against the first surface, and the connecting piece is inserted into the inner cavity of the second connecting beam to connect and fix.

13. The method according to claim 12, characterized in that The connecting piece is inserted into the inner cavity of the second connecting beam for connection and fixing, including fixing the connecting piece to the end of the second connecting beam by self-piercing riveting or rivet-free connection.

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