Connecting structure for cases of energy storage system, energy storage system, and electrical device

Abstract

An electrical device. The electrical device comprises an energy storage system, the energy storage system comprises a connecting structure for cases of the energy storage system, and the connecting structure for the cases of the energy storage system comprises first connecting assemblies and a second connecting assembly. The first connecting assemblies are suitable for being electrically connected to cells in the cases. Each first connecting assembly comprises first snap-fit portions. The second connecting assembly is electrically connected to the first connecting assemblies. The second connecting assembly comprises second snap-fit portions. The second snap-fit portions are snap-fitted to the first snap-fit portions.

Description

Connection structure for energy storage system box, energy storage system and electrical device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202420629896.9, filed with the State Intellectual Property Office of China on March 28, 2024, entitled “Connection structure for energy storage system box, energy storage system and electrical device”, the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the technical field of electrical devices, and in particular to a connection structure for an energy storage system box, an energy storage system, and an electrical device. Background Art

[0004] In related art, the boxes in an energy storage system need to be electrically connected together via a connecting structure, which includes a first connecting assembly and a second connecting assembly. However, the first connecting assembly and the second connecting assembly are electrically connected directly through plug-in connection. During the movement and transportation of the energy storage system, the connection between the first connecting assembly and the second connecting assembly can easily loosen, resulting in a poor connection between the first and second connecting assemblies. This requires reassembling the energy storage system and reconnecting the first and second connecting assemblies, which is cumbersome and inconvenient.

[0005] Public content

[0006] The present disclosure aims to address at least one of the technical problems existing in the prior art. To this end, the present disclosure proposes a connection structure for a box body of an energy storage system. This connection structure for the box body of the energy storage system can ensure the stability and reliability of the electrical connection between the second connection component and the first connection component, avoiding the need for reassembly of the energy storage system, thereby simplifying operation and increasing convenience.

[0007] The present disclosure further provides an energy storage system.

[0008] The present disclosure further provides an electrical device.

[0009] According to the connection structure of the box for the energy storage system disclosed in the present invention, it includes: a first connection component, which is suitable for electrically connecting to the battery cell in the box, and the first connection component includes a first clamping portion; and a second connection component, which is electrically connected to the first connection component, and the second connection component includes a second clamping portion, and the second clamping portion is clamped and matched with the first clamping portion.

[0010] According to the connection structure of the box for the energy storage system disclosed in the present invention, the connection between the second connecting component and the first connecting component can be made more firm and tight through the clamping connection between the second clamping portion and the first clamping portion. During the movement and transportation of the energy storage system, the second connecting component is not easy to fall off from the first connecting component, thereby ensuring the stability and reliability of the electrical connection between the second connecting component and the first connecting component and avoiding the need to re-disassemble the energy storage system, thereby making the operation simpler and the use more convenient.

[0011] In some examples of the present disclosure, one of the first clamping portion and the second clamping portion is configured as a clamping strip having a clamping slot, and the other of the first clamping portion and the second clamping portion is configured as a clamping hook, which is clamped into engagement with the clamping slot.

[0012] In some examples of the present disclosure, the first connecting component also includes a first connecting member and a first insulating member, the first insulating member is sleeved outside the first connecting member, and the first clamping portion is arranged on the outer wall of the first insulating member; the second connecting component also includes a second connecting member and a second insulating member, the second insulating member is sleeved outside the second connecting member, the second connecting member is electrically connected to the first connecting member, and the second clamping portion is arranged at one end of the second insulating member facing the first clamping portion.

[0013] In some examples of the present disclosure, the first connecting component further includes a first limiting portion, which is arranged on the outer wall of the first insulating member; the second insulating member is provided with a second limiting portion at one end facing the first connecting component, and the second limiting portion is limitedly cooperated with the first limiting portion.

[0014] In some examples of the present disclosure, one of the first limiting portion and the second limiting portion is configured as a limiting block, and the other of the first limiting portion and the second limiting portion is configured as a limiting slot, and the limiting slot is limitedly matched with the limiting block.

[0015] In some examples of the present disclosure, the first connecting member is configured as a plug-in column, and one end of the second connecting member facing the first connecting member is configured as a deformable claw-shaped structure, and the plug-in column is plugged into the claw-shaped structure.

[0016] In some examples of the present disclosure, the first connecting component further includes: a third connecting member, the third connecting member being electrically connected to an end of the first connecting member away from the second connecting member.

[0017] In some examples of the present disclosure, the first connecting assembly further includes a third insulating member, the third insulating member is sleeved on the first insulating member, and a mounting hole is provided on the third insulating member.

[0018] In some examples of the present disclosure, the first connecting assembly further includes a sealing member, a mating groove is provided on a side of the third insulating member away from the second connecting member, and the sealing member is disposed in the mating groove.

[0019] In some examples of the present disclosure, a plurality of reinforcing ribs are provided on a side of the third insulating member adjacent to the second connecting member, and the plurality of reinforcing ribs are cross-arranged.

[0020] In some examples of the present disclosure, the third insulating member and the second insulating member are an integrally formed structure.

[0021] In some examples of the present disclosure, the second connecting component further includes a fourth connecting member, there are two second connecting members, and both ends of the fourth connecting member are electrically connected to the two second connecting members respectively.

[0022] In some examples of the present disclosure, an outer wall of the fourth connecting member is provided with an insulating layer.

[0023] According to the energy storage system disclosed in the present invention, it includes: a first box; a second box, both the first box and the second box are provided with battery cells; and the above-mentioned connection structure for the box of the energy storage system, wherein there are two first connection components, the second connection component is electrically connected between the two first connection components, the two first connection components are respectively fixed to the first box and the second box, and the two first connection components are respectively electrically connected to the battery cells in the first box and the battery cells in the second box; or there are two connection structures, one first connection component of one of the connection structures is electrically connected to the battery cells in the first box, one first connection component of the other connection structure is electrically connected to the battery cells in the second box, and the other first connection component of one of the connection structures is electrically connected to the other first connection component of the other connection structure.

[0024] The electric device according to the present disclosure includes: the energy storage system described above.

[0025] Additional aspects and advantages of the present disclosure will be given in part in the description that follows and, in part, will be obvious from the description that follows, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] FIG1 is a schematic structural diagram of a first connecting assembly at a first angle;

[0028] FIG2 is a schematic structural diagram of the first connecting assembly at a second angle;

[0029] FIG3 is a cross-sectional view of the first connecting assembly;

[0030] FIG4 is a schematic structural diagram of a second connection assembly;

[0031] FIG5 is a cross-sectional view of the second connecting assembly;

[0032] FIG6 is a schematic diagram of a partial structure of a second connecting assembly;

[0033] FIG7 is a schematic diagram of a partial structure of an energy storage system according to an embodiment of the present disclosure;

[0034] FIG8 is a partial cross-sectional view of an energy storage system according to an embodiment of the present disclosure;

[0035] FIG9 is a schematic block diagram of a first box according to an embodiment of the present disclosure;

[0036] FIG10 is a schematic block diagram of a second box according to an embodiment of the present disclosure;

[0037] FIG11 is a schematic block diagram of an electric device according to an embodiment of the present disclosure.

[0038] Figure numerals: electrical device 100, connection structure 1, energy storage system 2, first connecting component 10, first clamping part 11, clamping slot 110, first connecting member 12, first insulating member 13, first limiting part 14, third connecting member 15, connecting hole 150, third insulating member 16, mounting hole 160, matching groove 161, reinforcing rib 162, sealing member 17, second connecting component 20, second clamping part 21, second connecting member 22, second insulating member 23, second limiting part 24, fourth connecting member 25, first connecting part 250, second connecting part 251, insulating layer 26, first box body 30, second box body 40, box body 34, battery cell 50. DETAILED DESCRIPTION

[0039] Embodiments of the present disclosure are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0040] The following describes a connection structure 1 of a box 34 for an energy storage system 2 according to an embodiment of the present disclosure with reference to FIG. 1 to FIG. 10 . The connection structure 1 is applied to the energy storage system 2 and is electrically connected between two boxes 34 .

[0041] As shown in Figures 7 to 10, the connection structure 1 for the box 34 of the energy storage system 2 according to the embodiment of the present disclosure includes: a first connection component 10 and a second connection component 20. There are generally two first connection components 10, and the two first connection components 10 are respectively connected to the two boxes 34 of the energy storage system 2, and one first connection component 10 is suitable for electrically connecting to the battery cell 50 in one of the boxes 34, while the other first connection component 10 is suitable for electrically connecting to the battery cell 50 in the other box 34. The second connection component 20 is electrically connected between the two first connection components 10, so that the two first connection components 10 can be electrically connected together, so that the battery cells 50 in the two boxes 34 can be electrically connected together to achieve series connection, thereby increasing the charge of the energy storage system 2 and making it more durable. Among them, the first connection component 10 can be a male component, and the second connection component 20 can be a female component.

[0042] As shown in Figures 1, 4-5, and 8-10, the first connecting assembly 10 includes a first clamping portion 11, and the second connecting assembly 20 includes a second clamping portion 21. The second clamping portion 21 is engaged with the first clamping portion 11. Specifically, the two first connecting assemblies 10 are first electrically connected to the battery cells 50 in the two boxes 34, respectively. Then, the second connecting assembly 20 is electrically connected to the two first connecting assemblies 10. After the second connecting assembly 20 is electrically connected to the two first connecting assemblies 10, the second connecting assembly 20 is securely fastened to the two first connecting assemblies 10 by engaging the second clamping portion 21 with the first clamping portion 11.

[0043] Thus, the engagement between the second engaging portion 21 and the first engaging portion 11 makes the connection between the second connecting assembly 20 and the first connecting assembly 10 more secure and tight. During the movement and transportation of the energy storage system 2, the second connecting assembly 20 is unlikely to fall off the first connecting assembly 10, thereby ensuring the stability and reliability of the electrical connection between the second connecting assembly 20 and the first connecting assembly 10 and avoiding the need to reassemble and disassemble the energy storage system 2, thereby making operation simpler and more convenient.

[0044] It should be noted that, as shown in Figures 1 and 4, multiple first clamping portions 11 and multiple second clamping portions 21 can be provided, with multiple first clamping portions 11 spaced apart, and multiple second clamping portions 21 spaced apart, with multiple first clamping portions 11 corresponding to multiple second clamping portions 21. This can increase the number of clamping points between the second connecting component 20 and the first connecting component 10, expand the clamping range, and thus further enhance the connection strength between the second connecting component 20 and the first connecting component 10.

[0045] As shown in Figures 1, 4 and 5, one of the first and second clamping portions 11 and 21 is configured as a clamping strip, which is provided with a clamping slot 110, and the other of the first and second clamping portions 11 and 21 is configured as a hook, which is engaged with the clamping slot 110. In other words, the first and second clamping portions 11 and 21 can be a structure of a clamping strip and a hook, for example, the first clamping portion 11 is a clamping strip, the second clamping portion 21 is a hook, and the clamping strip is provided with a clamping slot 110. Through the engagement of the hook and the clamping slot 110, the second connecting component 20 is firmly and tightly connected to the first connecting component 10. This makes the operation simple and convenient, which can improve the installation efficiency. In addition, the structure of the clamping strip, the clamping slot 110 and the hook is simple, and the processing and setting are more convenient, which can reduce the cost to a certain extent.

[0046] Specifically, as shown in Figures 1 to 6, the first connecting assembly 10 further includes a first connecting member 12 and a first insulating member 13. The first insulating member 13 is sleeved outside the first connecting member 12, and the first clamping portion 11 is provided on the outer wall of the first insulating member 13. The second connecting assembly 20 further includes a second connecting member 22 and a second insulating member 23. The second insulating member 23 is sleeved outside the second connecting member 22, and the second connecting member 22 is electrically connected to the first connecting member 12. The second clamping portion 21 is provided at one end of the second insulating member 23 that faces the first clamping portion 11.

[0047] The first connector 12 is the portion of the first connector assembly 10 that provides electrical connection, while the first insulating member 13 is the portion of the first connector assembly 10 that provides insulation protection. The first insulating member 13 is positioned over the first connector 12 to insulate the first connector 12, preventing it from leaking out and preventing people from accidentally touching the first connector 12 during installation and securing, potentially causing electric shock. Furthermore, the first insulating member 13 protects the first connector 12 from being affected by the external environment, thereby ensuring a more stable and reliable electrical connection.

[0048] Similarly, the second connector 22 is the portion of the second connector assembly 20 that functions as an electrical connection. The second connector 22 is electrically connected to the first connector 12, thereby enabling electrical connection between the second connector assembly 20 and the first connector assembly 10. The second insulating member 23 is the portion of the second connector assembly 20 that functions as an insulating protection. The second insulating member 23 is sleeved onto the outside of the second connector 22, and the second insulating member 23 can be sleeved onto the second connector 22 by hot-melt. In this way, the second insulating member 23 can insulate the second connector 22, preventing it from leaking out and preventing people from accidentally touching the second connector 22 during installation and fixing, thereby preventing electric shock. In addition, the second insulating member 23 can also prevent the external environment from affecting the second connector 22, thereby making the electrical connection of the second connector 22 more stable and reliable.

[0049] The first clamping portion 11 is arranged on the outer wall of the first insulating member 13, and the second clamping portion 21 is arranged at one end of the second insulating member 23 facing the first clamping portion 11. In this way, the position setting between the first clamping portion 11 and the second clamping portion 21 is more reasonable, avoiding the first clamping portion 11 from interfering with the first connecting member 12, and the second clamping portion 21 from interfering with the second connecting member 22. In addition, when the second connecting member 22 is electrically connected to the first connecting member 12, the clamping fit between the first clamping portion 11 and the second clamping portion 21 is facilitated.

[0050] Furthermore, as shown in Figures 1 to 5, the first connecting assembly 10 also includes a first limiting portion 14, which is provided on the outer wall of the first insulating member 13. The second insulating member 23 is provided with a second limiting portion 24 at one end thereof facing the first connecting assembly 10, and the second limiting portion 24 cooperates with the first limiting portion 14 in a limiting manner. The first limiting portion 14 is the portion of the first connecting assembly 10 that serves as a limiting portion, and the second limiting portion 24 is the portion of the second connecting assembly 20 that serves as a limiting portion. The second limiting portion 24 cooperates with the first limiting portion 14 in a limiting manner. In this way, after the second connecting member 22 is electrically connected to the first connecting member 12, the second connecting assembly 20 can be prevented from circumferentially rotating relative to the first connecting assembly 10, thereby improving the stability and reliability of the connection between the second connecting assembly 20 and the first connecting assembly 10.

[0051] The first limiting portion 14 is arranged on the outer wall of the first insulating member 13, and the second limiting portion 24 is located at one end of the second insulating member 23 facing the first connecting component 10. Similarly, the position setting between the first limiting portion 14 and the second limiting portion 24 is more reasonable, avoiding the first limiting portion 14 from interfering with the first connecting member 12, and the second limiting portion 24 from interfering with the second connecting member 22. In addition, when the second connecting member 22 is electrically connected to the first connecting member 12, the first limiting portion 14 and the second limiting portion 24 are facilitated to engage with each other.

[0052] As shown in Figures 1 and 4, one of the first limiting portion 14 and the second limiting portion 24 is configured as a limiting block, and the other of the first limiting portion 14 and the second limiting portion 24 is configured as a limiting slot, with the limiting slot and the limiting block being in a positional relationship. In other words, the first limiting portion 14 and the second limiting portion 24 can be a structure that combines a limiting block and a limiting slot. For example, the first limiting portion 14 is a limiting block, and the second clamping portion 21 is a limiting slot. Through the positional relationship between the limiting block and the limiting slot, the connection between the second connecting assembly 20 and the first connecting assembly 10 is made more stable and reliable. When the second connecting assembly 20 is connected to the first connecting assembly 10, the limiting block can align with the limiting slot for installation and connection, acting as a guide, making the installation and connection between the second connecting assembly 20 and the first connecting assembly 10 simpler and more convenient, thereby improving installation efficiency. Furthermore, the positions of the first limiting portions 14 of different first connecting assemblies 10 are different, which can serve as a foolproofing feature and prevent the second connecting assembly 20 from being connected incorrectly to the first connecting assembly 10. In addition, the structures of the limit blocks and limit grooves are simple, and the processing and setting are more convenient, which can reduce costs to a certain extent.

[0053] Furthermore, as shown in Figures 1, 4, and 6, the first connector 12 is configured as a plug-in post, and the second connector 22 is configured as a deformable claw-shaped structure at one end facing the first connector 12, with the plug-in post inserted into the claw-shaped structure. In other words, the first connector 12 is configured as a plug-in post, such as a cylindrical plug-in post, and the second connector 22 is configured as a claw-shaped structure at one end facing the first connector 12. Before the first connector 12 and the second connector 22 are connected, the claw-shaped structure remains in its original shape. When the first connector 12 and the second connector 22 are connected, the plug-in post can be directly inserted into the claw-shaped structure, at which point the claw-shaped structure gradually deforms and secures the plug-in post within the claw-shaped structure. In this way, there is no need to pre-crimp the cables, making the connection between the first connector 12 and the second connector 22 simple and convenient, improving assembly efficiency, and the claw-shaped structure can clamp the plug-in column, making the connection between the first connector 12 and the second connector 22 more secure, ensuring the stability and reliability of the electrical connection between the first connector 12 and the second connector 22.

[0054] Of course, as shown in Figures 1-3 and 8-10, the first connecting assembly 10 also includes a third connecting member 15. The third connecting member 15 is electrically connected to the end of the first connecting member 12 distal from the second connecting member 22. A connecting hole 150 is provided on the third connecting member 15. The third connecting member 15 is primarily used to electrically connect to the battery cells 50 within the housing 34 of the energy storage system 2 and can be in the form of a horizontal rectangle. The third connecting member 15 is electrically connected to the end of the first connecting member 12 distal from the second connecting member 22. It is understood that if one end of the first connecting member 12 is electrically connected to the second connecting member 22, the third connecting member 15 can be electrically connected to the other end of the first connecting member 12. This facilitates the insertion of the third connecting member 15 into the housing 34 of the energy storage system 2. Furthermore, the third connecting member 15 is in communication with the first connecting member 12, thereby forming a connecting path between the first connecting member 12, the second connecting member 22, and the third connecting member 15, thereby achieving communication between the two housings 34 of the energy storage system 2. The third connector 15 is provided with a connection hole 150 , so that the positive and negative terminals of the battery cells 50 inside the box 34 can be connected to the connection hole 150 by screws, thereby being electrically connected to the third connector 15 .

[0055] According to an optional embodiment of the present disclosure, as shown in Figures 1 to 3 and 8, the first connecting assembly 10 further includes a third insulating member 16, which is sleeved on the first insulating member 13 and provided with a mounting hole 160. First, the third insulating member 16 can play a role in installation and fixing. Mounting holes 160 can be provided at the four corners of the third insulating member 16, and then the third insulating member 16 can be screwed to the box 34 of the energy storage system 2 through the mounting holes 160, so that the first connecting assembly 10 can be firmly connected to the box 34 of the energy storage system 2. In addition, the third insulating member 16 can play an insulating role, insulating the box 34 of the energy storage system 2 from the external structure to avoid accidental electric shock. The third insulating member 16 is sleeved on the first insulating member 13, so that a portion of the first insulating member 13 is located outside the box 34 of the energy storage system 2 to facilitate the electrical connection between the first connecting member 12 and the second connecting member 22, and the other portion is located inside the box 34 of the energy storage system 2, which facilitates the sealing of the inside and outside of the box 34 of the energy storage system 2 to a certain extent.

[0056] Secondly, as shown in Figures 2, 3 and 8, the first connecting assembly 10 also includes a sealing member 17. A mating groove 161 is provided on the side of the third insulating member 16 away from the second connecting member 22, and the sealing member 17 is disposed in the mating groove 161. The sealing member 17 mainly plays a sealing role. The mating groove 161 is provided on the side of the third insulating member 16 away from the second connecting member 22. The mating groove 161 can play a limiting role, so that the sealing member 17 can be stably and reliably disposed in the mating groove 161 and is not prone to falling off. Specifically, when the third insulating member 16 is installed with the box 34 of the energy storage system 2, the sealing member 17 between the third insulating member 16 and the box 34 of the energy storage system 2 is compressed, thereby playing a sealing role and preventing gas leakage inside the box 34 of the energy storage system 2. The sealing member 17 can be a rubber sealing ring, which can be disposed in the mating groove 161 by bonding.

[0057] In addition, as shown in FIG1 , a plurality of reinforcing ribs 162 are provided on the side of the third insulating member 16 adjacent to the second connecting member 22, and the plurality of reinforcing ribs 162 are arranged crosswise. The reinforcing ribs 162 can enhance the structural strength. The reinforcing ribs 162 are provided on the side of the third insulating member 16 adjacent to the second connecting member 22. This can prevent the reinforcing ribs 162 from being provided on the side of the third insulating member 16 away from the second connecting member 22, thereby preventing a gap from being formed between the third insulating member 16 and the housing 34 of the energy storage system 2, thereby affecting the sealing effect. The reinforcing ribs 162 can also enhance the structural strength of the third insulating member 16, making the third insulating member 16 less susceptible to damage when being installed and fixed to the housing 34 of the energy storage system 2. In addition, there are multiple reinforcing ribs 162, and the plurality of reinforcing ribs 162 are arranged crosswise. This can expand the range of the reinforcing ribs 162 and increase the structural strength between the plurality of reinforcing ribs 162, thereby further improving the structural strength of the third insulating member 16.

[0058] It should be noted that, as shown in FIG1 , the third insulating member 16 and the second insulating member 23 are integrally formed. In other words, the third insulating member 16 and the second insulating member 23 are a single, integral structural member. This facilitates installation of the third insulating member 16 and the second insulating member 23 . No connection or fixation between the third insulating member 16 and the second insulating member 23 is required, making installation simpler and more convenient. Furthermore, only one template is required for processing, which can reduce production costs to a certain extent.

[0059] Optionally, as shown in Figures 5, 6, 8-10, the second connection assembly 20 further includes a fourth connection member 25, there are two second connection members 22, and both ends of the fourth connection member 25 are electrically connected to the two second connection members 22 respectively. That is to say, in addition to the second connection member 22, the second connection assembly 20 further includes a fourth connection member 25, there are two second connection members 22, and after the two second connection members 22 are electrically connected to the first connection members 12 of the first connection assembly 10 on the two boxes 34, the two ends of the fourth connection member 25 are electrically connected to the two second connection members 22 respectively. The fourth connection member 25 and the second connection member 22 can be welded, so that the two second connection members 22 will be connected and conductive, so that the battery cells 50 in the two boxes 34 can be connected and conductive, realizing series connection, and increasing the charge of the energy storage system 2. The fourth connecting member 25 can be a hard copper busbar, and the fourth connecting member 25 is the main body connecting the second connecting members 22. It can be customized according to the input and output current of the box 34 of the energy storage system 2 and the relative position of the first connecting components 10 on the two boxes 34.

[0060] Specifically, as shown in Figures 5 and 6, the fourth connector 25 includes a first connector 250 and two second connectors 251. In the first direction, the two second connectors 251 are connected to the two second connectors 22 in a one-to-one correspondence. In the second direction, the first connector 250 is electrically connected between the two second connectors 251, and the first and second directions are arranged perpendicularly. That is, when the fourth connector 25 is electrically connected to the second connector 22, the second connectors 251 and the second connector 22 are aligned along the first direction, while the first connector 250 and the second connector 251 are at right angles. This avoids the need to bend the fourth connector 25 when the second connector 22 is electrically connected to the first connector 12 when the fourth connector 25 is a straight cable, which would be inconvenient for the plug-in connection between the second connector 22 and the first connector 12. It also avoids the problem of excessive stress at the bending corner of the fourth connector 25 after bending, which can easily cause damage, thereby making the structure of the fourth connector 25 more stable and reliable. Of course, such an arrangement can also reduce the space occupied by the bent portion to a certain extent.

[0061] In addition, as shown in Figures 4 and 5, the outer wall of the fourth connector 25 is provided with an insulating layer 26. Specifically, the insulating layer 26 refers to the insulating portion of the second connecting component 20 obtained by the dipping method, which covers the outer wall of the fourth connector 25. The insulating layer 26 can insulate the fourth connector 25, preventing the fourth connector 25 from leaking out, and avoiding people accidentally touching the fourth connector 25 during installation and fixing, thereby preventing electric shock. In addition, the insulating layer 26 can also prevent the external environment from affecting the fourth connector 25, thereby making the electrical connection of the fourth connector 25 more stable and reliable.

[0062] As shown in Figures 7 to 10, the energy storage system 2 according to an embodiment of the present disclosure includes a first box body 30, a second box body 40 and a connection structure 1 for the box body 34 of the energy storage system 2 described in any of the above embodiments. Battery cells 50 are provided in the first box body 30 and the second box body 40. There are two first connection components 10, and the two first connection components 10 are respectively fixed on the first box body 30 and the second box body 40. The two first connection components 10 are electrically connected to the battery cells 50 in the first box body 30 and the battery cells 50 in the second box body 40, respectively.

[0063] Specifically, two first connection components 10 are generally provided, and the second connection component 20 is electrically connected between the two first connection components 10. The two first connection components 10 are fixed to the first box 30 and the second box 40, respectively. The first connection component 10 connected to the first box 30 is suitable for electrically connecting to the battery cell 50 in the first box 30, and the first connection component 10 connected to the second box 40 is suitable for electrically connecting to the battery cell 50 in the second box 40. The second connection component 20 is electrically connected between the two first connection components 10, so that the two first connection components 10 can be electrically connected together, so that the battery cells 50 in the two boxes 34 can be electrically connected together to achieve series connection, thereby increasing the amount of charge of the energy storage system 2 and making it more durable.

[0064] Alternatively, there are two connection structures 1, wherein a first connection component 10 of one connection structure 1 is electrically connected to the battery cell 50 in the first box 30, and a first connection component 10 of the other connection structure 1 is electrically connected to the battery cell 50 in the second box 40, and the other first connection component 10 of one connection structure 1 is electrically connected to the other first connection component 10 of the other connection structure 1. In other words, there are two connection structures 1, wherein one end of one connection structure 1 is electrically connected to the battery cell 50 in the first box 30, and one end of the other connection structure 1 is electrically connected to the battery cell 50 in the second box 40, and then the other ends of the two connection structures 1 are connected together. In this way, the battery cells 50 in the two boxes 34 can be connected in parallel through the two connection structures 1, which can also increase the charge of the energy storage system 2 and make it more durable.

[0065] The electric device 100 according to an embodiment of the present disclosure includes the energy storage system 2 described in any of the above embodiments, as shown in FIG11 .

[0066] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0067] In the description of the present disclosure, "first feature" and "second feature" may include one or more of the features. In the description of the present disclosure, "plurality" means two or more. In the description of the present disclosure, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present disclosure, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0068] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0069] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A connection structure (1) for a box (34) of an energy storage system (2), comprising: A first connecting assembly (10), the first connecting assembly (10) being adapted to be electrically connected to a battery cell (50) in a box (34), the first connecting assembly (10) comprising a first clamping portion (11); and A second connecting component (20), wherein the second connecting component (20) is electrically connected to the first connecting component (10), and the second connecting component (20) comprises a second clamping portion (21), and the second clamping portion (21) is clamped and matched with the first clamping portion (11).

2. The connection structure (1) of the box (34) for the energy storage system (2) according to claim 1, wherein: One of the first clamping portion (11) and the second clamping portion (21) is configured as a clamping strip, on which a clamping slot (110) is provided, and the other of the first clamping portion (11) and the second clamping portion (21) is configured as a clamping hook, which is clamped and matched with the clamping slot (110).

3. The connection structure (1) of a box (34) for an energy storage system (2) according to claim 1 or 2, wherein: The first connecting assembly (10) further comprises a first connecting member (12) and a first insulating member (13), wherein the first insulating member (13) is sleeved outside the first connecting member (12), and the first clamping portion (11) is arranged on the outer wall of the first insulating member (13); The second connecting component (20) further comprises a second connecting member (22) and a second insulating member (23), wherein the second insulating member (23) is sleeved outside the second connecting member (22), the second connecting member (22) is electrically connected to the first connecting member (12), and the second clamping portion (21) is arranged at one end of the second insulating member (23) facing the first clamping portion (11).

4. The connection structure (1) of the box (34) for the energy storage system (2) according to claim 3, wherein: The first connecting assembly (10) further includes a first limiting portion (14), wherein the first limiting portion (14) is arranged on the outer wall of the first insulating member (13); A second limiting portion (24) is provided at one end of the second insulating member (23) facing the first connecting assembly (10), and the second limiting portion (24) is in limiting cooperation with the first limiting portion (14).

5. The connection structure (1) of the box (34) for the energy storage system (2) according to claim 4, wherein: One of the first limiting portion (14) and the second limiting portion (24) is configured as a limiting block, and the other of the first limiting portion (14) and the second limiting portion (24) is configured as a limiting groove, and the limiting groove is in limiting cooperation with the limiting block.

6. The connection structure (1) of a box (34) for an energy storage system (2) according to any one of claims 3 to 5, wherein: The first connecting member (12) is configured as a plug-in column, and one end of the second connecting member (22) facing the first connecting member (12) is configured as a deformable claw-shaped structure, and the plug-in column is plugged into the claw-shaped structure.

7. The connection structure (1) of a box (34) for an energy storage system (2) according to any one of claims 3 to 6, wherein: The first connecting component (10) further comprises a third connecting member (15), wherein the third connecting member (15) is electrically connected to an end of the first connecting member (12) away from the second connecting member (22).

8. The connection structure (1) of a box (34) for an energy storage system (2) according to any one of claims 3 to 7, wherein: The first connecting assembly (10) further includes a third insulating member (16), the third insulating member (16) being sleeved on the first insulating member (13), and a mounting hole (160) being provided on the third insulating member (16).

9. The connection structure (1) of a box (34) for an energy storage system (2) according to claim 8, wherein: The first connecting component (10) further comprises a sealing member (17); a matching groove (161) is provided on a side of the third insulating member (16) away from the second connecting member (22); and the sealing member (17) is disposed in the matching groove (161).

10. The connection structure (1) of a box (34) for an energy storage system (2) according to claim 8 or 9, wherein: A plurality of reinforcing ribs (162) are provided on one side of the third insulating member (16) adjacent to the second connecting member (22), and the plurality of reinforcing ribs (162) are arranged in a cross-arranged manner.

11. The connection structure (1) of a box (34) for an energy storage system (2) according to any one of claims 8 to 10, wherein: The third insulating member (16) and the second insulating member (23) are an integrally formed structure.

12. The connection structure (1) of a box (34) for an energy storage system (2) according to any one of claims 3 to 11, wherein: The second connecting component (20) further includes a fourth connecting member (25), there are two second connecting members (22), and both ends of the fourth connecting member (25) are electrically connected to the two second connecting members (22) respectively.

13. The connection structure (1) of a box (34) for an energy storage system (2) according to claim 12, wherein: An outer wall of the fourth connecting member (25) is provided with an insulating layer (26).

14. An energy storage system (2), comprising: a first housing (30); a second box (40), wherein both the first box (30) and the second box (40) are provided with battery cells (50); and The connection structure (1) of a box (34) for an energy storage system (2) according to any one of claims 1 to 13, wherein there are two first connection components (10), the second connection component (20) is electrically connected between the two first connection components (10), the two first connection components (10) are respectively fixed to the first box (30) and the second box (40), and the two first connection components (10) are respectively electrically connected to the battery cell (50) in the first box (30) and the battery cell (50) in the second box (40); or There are two connecting structures (1), wherein one of the first connecting components (10) of one of the connecting structures (1) is electrically connected to the battery cell (50) in the first box (30), and one of the first connecting components (10) of the other connecting structure (1) is electrically connected to the battery cell (50) in the second box (40), and another of the first connecting components (10) of one of the connecting structures (1) is electrically connected to another of the first connecting components (10) of the other connecting structure (1).

15. An electrical device (100), comprising: The energy storage system (2) according to claim 14.

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