Connecting structure for battery pack, energy storage device, energy storage system and charging network

Abstract

This application provides a connection structure, energy storage device, energy storage system, and charging network for a battery pack. The connection structure connects the battery pack to a mounting frame. The connection structure includes a mounting component and a connecting component. The mounting component is disposed on the mounting frame and includes at least two first connectors spaced apart along a first direction. Any one of the first connectors extends along a second direction, where the first and second directions intersect. The connecting component is disposed on the battery pack and includes at least two second connectors spaced apart along the first direction. Any one of the second connectors extends along the second direction. The at least two first connectors and the at least two second connectors slide in cooperation along the second direction to form at least two connecting units, wherein the cooperation parameters of the two connecting units are different. This ensures a stable connection between the battery pack and the mounting frame, improving assembly efficiency.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a connection structure for a battery pack, an energy storage device, an energy storage system, and a charging network. Background Technology

[0002] Battery packs are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with battery packs are already widely used. In addition, battery packs are increasingly being used in the field of energy storage.

[0003] During the use of battery packs, they need to be stored in energy storage cabinets or transported in energy storage containers. In related technologies, assembling battery packs in energy storage devices is difficult, has low assembly efficiency, and exhibits poor connection stability between the battery pack and the energy storage device. Summary of the Invention

[0004] In view of this, embodiments of this application aim to provide a connection structure, energy storage device, energy storage system, and charging network for a battery pack, so as to improve the assembly efficiency and connection stability of the battery pack in the energy storage device.

[0005] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a connection structure for a battery pack, used to connect the battery pack to a mounting frame, the connection structure including:

[0007] An installation component is disposed on an installation frame. The installation component includes at least two first connectors, which are spaced apart along a first direction. Any one of the first connectors extends along a second direction, wherein the first direction and the second direction intersect.

[0008] A connecting component is disposed in a battery pack. The connecting component includes at least two second connectors, which are spaced apart along a first direction, and any one of the second connectors extends along a second direction.

[0009] At least two first connectors and at least two second connectors slide in a second direction to form at least two connecting units, wherein the mating parameters of the two connecting units are different.

[0010] In the connection structure of the embodiments of this application, the connection unit with small parameters can improve the assembly accuracy of the first connector and the second connector, making the connection between the battery pack and the mounting frame stable; the connection unit with large parameters can reduce the assembly difficulty of the first connector and the second connector, thereby improving the assembly efficiency of the battery pack and the mounting frame.

[0011] In some embodiments, the second connector and the first connector are clearance-fitted to form a connecting unit, wherein one of the connecting units is the first connecting unit;

[0012] The first connecting unit has a smaller mating clearance in the first direction than the mating clearance of the other connecting units in the first direction; and / or, the first connecting unit has a smaller mating clearance in a third direction than the mating clearance of the other connecting units in the third direction, wherein the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0013] In the above technical solution, the connection unit with a small mating clearance in the first direction can improve the assembly accuracy of the first connector and the second connector in the first direction, and the connection unit with a small mating clearance in the third direction can improve the assembly accuracy of the first connector and the second connector in the third direction, so that the connection between the battery pack and the mounting frame is stable; the connection unit with a large mating clearance in the first direction can reduce the assembly difficulty of the first connector and the second connector in the first direction, and the connection unit with a large mating clearance in the third direction can reduce the assembly difficulty of the first connector and the second connector in the third direction, thereby helping to improve the assembly efficiency of the battery pack and the mounting frame.

[0014] In some embodiments, the second connector and the first connector are clearance-fitted to form a connecting unit, wherein one connecting unit is the first connecting unit and the other connecting unit is the second connecting unit;

[0015] The first connecting unit has a smaller mating clearance in the first direction than the other connecting units in the first direction, and the second connecting unit has a smaller mating clearance in the third direction than the other connecting units in the third direction.

[0016] In the above technical solution, the dimensions of the first connector and the second connector can be selected according to the dimensions in the first direction and the third direction, which helps to reduce the difficulty of assembling the first connector and the second connector.

[0017] In some embodiments, the first connector has a first stop surface, the connecting assembly has a second stop surface, the first stop surface faces a first side in the second direction, and the second stop surface faces a second side in the second direction, wherein the first side and the second side are opposite sides in the second direction;

[0018] The first stop surface is used to cooperate with the second stop surface to stop in the second direction.

[0019] In the above technical solution, when the first connector and the second connector slide into place, the first stop surface and the second stop surface stop each other in the second direction, so that the first connector cannot continue to slide relative to the second connector, thereby reducing the risk of assembly failure caused by excessive sliding between the first connector and the second connector.

[0020] In some embodiments, the connection structure includes fasteners for detachably connecting the mounting assembly and the connecting assembly when the first and second connectors are slid into place.

[0021] In the above technical solution, fasteners can improve the connection stability between the battery pack and the mounting frame, while facilitating the disassembly and assembly of the battery pack and the mounting frame, reducing the assembly difficulty of the battery pack and the mounting frame, thereby improving assembly efficiency.

[0022] In some embodiments, the mounting assembly includes a bracket, a first connector disposed on and fixed relative to the bracket, fasteners connecting the bracket and the connecting assembly, and the bracket being used to carry the battery pack.

[0023] In the above technical solution, the bracket supports the battery pack, and the weight of the battery pack is transferred to the bracket through the connecting structure. This can reduce the load on the connecting structure, which helps to reduce local stress concentration and lower the risk of connecting structure failure.

[0024] In some embodiments, the first connector is detachably connected to the bracket. This facilitates the disassembly, assembly, and replacement of the first connector.

[0025] In some embodiments, the connecting component includes a positioning block disposed at one end of the second connector along a second direction, the positioning block and the bracket are stacked along a third direction, and fasteners connect the positioning block and the bracket.

[0026] In the above technical solution, the positioning block can be used to position the connecting component and the mounting component. The fastener connects the positioning block and the bracket, which can fix the second connecting component on the first connecting component and limit the second connecting component, thereby reducing the risk of failure of the fit caused by the second connecting component continuing to slide.

[0027] In some embodiments, one of the first connector and the second connector includes a track structure, and the other is formed with a guide groove. The guide groove and the track structure extend along a second direction, and the track structure slides within the guide groove along the second direction.

[0028] In the above technical solution, the track structure and guide groove cooperate to provide guidance for the sliding of the first connector and the second connector, thereby improving the sliding stability of the first connector and the second connector.

[0029] In some embodiments, the guide groove includes a slot facing the track structure in a third direction, and a cavity extending from the slot away from the track structure in a third direction, the dimension of the cavity in a first direction being larger than the dimension of the slot in the first direction;

[0030] The track structure includes a first guide portion and a second guide portion, which are arranged along a third direction. The dimension of the second guide portion along the first direction is greater than the dimension of the first guide portion along the first direction, and is also greater than the dimension of the slot along the first direction.

[0031] The second guide section is located in the groove cavity, and the first guide section passes through the groove opening.

[0032] In the above technical solution, the range of motion of the first guide part in the first direction can be limited, and the range of motion of the second guide part in the first and third directions can be limited, thereby reducing the risk of slippage between the track structure and the guide groove.

[0033] In some embodiments, a first fitting gap is formed between the sidewall of the track structure in the first direction and the sidewall of the guide groove in the first direction, and a second fitting gap is formed between the surface of the second guide portion facing the first guide portion and the surface of the groove cavity facing the second guide portion.

[0034] The first mating gap of the first connecting unit is smaller than the first mating gap of the other connecting units; and / or, the second mating gap of the first connecting unit is smaller than the second mating gap of the other connecting units.

[0035] In the above technical solution, the first connecting unit with a small mating gap can improve the assembly accuracy of the track structure and guide groove in the first direction, and the second connecting unit with a small mating gap can improve the assembly accuracy of the track structure and guide groove in the third direction, so that the connection between the battery pack and the mounting frame is stable. The first connecting unit with a large mating gap can reduce the assembly difficulty and manufacturing accuracy requirements of the track structure and guide groove in the first direction, and the second connecting unit with a large mating gap can reduce the assembly difficulty and manufacturing accuracy requirements of the track structure and guide groove in the third direction, which helps to reduce manufacturing costs and improve assembly efficiency.

[0036] In some embodiments, the first mating gap of the first connecting unit is smaller than the first mating gap of the other connecting units, and the second mating gap of the second connecting unit is smaller than the second mating gap of the other connecting units.

[0037] In the above technical solution, the dimensions of the track structure and the guide groove can be selected according to the dimensions in the first direction and the third direction, which helps to reduce the difficulty of assembling the track structure and the guide groove.

[0038] In some embodiments, the connector with the guide groove protrudes outward along a third direction from the groove opening and forms a protrusion.

[0039] In the above technical solution, the protrusion can increase the contact area and structural strength of the connector, which is beneficial to improving the connection stability of the mounting components and the connecting components.

[0040] In some embodiments, the connection structure includes fasteners, the mounting assembly includes a bracket, a first connector is disposed on the bracket and fixed relative to the bracket, the fasteners connect the bracket and a second connector, and the bracket is used to carry the battery pack;

[0041] The first connector includes a track structure, the second connector forms a guide groove, the connecting assembly includes a positioning block, the positioning block and the bracket are stacked along a third direction, and fasteners connect the positioning block and the bracket;

[0042] The positioning block is disposed on the first side of the guide groove facing the second direction, and the positioning block covers at least part of the guide groove. The first side of the track structure facing the second direction forms a first stop surface, and the second side of the positioning block facing the second direction forms a second stop surface. The first side and the second side are opposite sides of the second direction, and the first stop surface is used to stop and cooperate with the second stop surface in the second direction.

[0043] In the above technical solution, when the first connector and the second connector slide into place, the first stop surface and the second stop surface stop each other in the second direction, so that the first connector cannot continue to slide relative to the second connector, thereby reducing the risk of assembly failure caused by excessive sliding between the first connector and the second connector.

[0044] In some embodiments, a portion of the positioning block protrudes along a third direction away from the bracket to form a protrusion, which is inserted into a guide groove.

[0045] In the above technical solution, the bump can increase the structural strength of the positioning block, which is beneficial to improving the connection stability of the mounting components and connecting components.

[0046] Secondly, embodiments of this application provide an energy storage device, comprising:

[0047] Battery pack;

[0048] Mounting framework;

[0049] The connection structure consists of a connection component mounted on the battery pack and a mounting component mounted on the mounting frame.

[0050] In the above technical solution, by adopting the connection structure mentioned above, the connection stability between the battery pack and the mounting frame can be improved, while the disassembly and assembly of the battery pack and the mounting frame can be facilitated, the assembly difficulty of the battery pack and the mounting frame can be reduced, thereby improving the assembly efficiency of the energy storage device.

[0051] In some embodiments, when the first connector and the second connector are slid into place, the first end of the mounting assembly along the second direction and the first end of the connecting assembly along the second direction both extend beyond the battery pack, and the first end of the connecting assembly and the first end of the mounting assembly are connected by fasteners.

[0052] In the above technical solution, the first end of the mounting component along the second direction and the first end of the connecting component along the second direction both extend beyond the battery pack, which can provide installation space for the fastener, so that the fastener can install the connecting component on the mounting component from the part that extends beyond the battery pack.

[0053] In some implementations, the connection assembly is detachably attached to the bottom of the battery pack. This facilitates the removal, installation, and replacement of the connection assembly.

[0054] Thirdly, embodiments of this application provide an energy storage system, including a power conversion device and the aforementioned energy storage device, wherein the power conversion device is used to electrically connect a power generation device and an energy storage device.

[0055] Fourthly, embodiments of this application provide a charging network, including a charging pile and the aforementioned energy storage device or energy storage system, wherein the energy storage device is used to provide electrical energy to the charging pile. Attached Figure Description

[0056] Figure 1 This is a schematic diagram of the charging network structure in some embodiments of this application;

[0057] Figure 2 This is a schematic diagram of the energy storage system in some embodiments of this application;

[0058] Figure 3 This is a schematic diagram of the structure of the energy storage device in some embodiments of this application;

[0059] Figure 4 This is a partial structural schematic diagram of an energy storage device provided in an embodiment of this application;

[0060] Figure 5 for Figure 4 A schematic diagram of the energy storage device from another perspective;

[0061] Figure 6 for Figure 5 An enlarged schematic diagram of part A in the middle;

[0062] Figure 7 for Figure 5 Enlarged schematic diagram of part B;

[0063] Figure 8 for Figure 6 A schematic diagram of the structure of the components installed in the middle;

[0064] Figure 9 for Figure 6 A structural diagram of the connecting components and battery pack;

[0065] Figure 10 for Figure 9 An enlarged schematic diagram of section C;

[0066] Figure 11 for Figure 4 An enlarged schematic diagram of section D in the middle;

[0067] Figure 12 for Figure 8 A schematic diagram of the central track structure;

[0068] Figure 13 for Figure 10 Schematic diagram of the guide groove structure;

[0069] Figure 14 for Figure 10 Schematic diagram of the middle positioning block;

[0070] Figure 15 for Figure 8 An enlarged schematic diagram of section E in the middle.

[0071] Explanation of reference numerals in the attached figures

[0072] 1000 Charging network; 2000 Energy storage system; 3000 Power generation device; 500 Energy storage converter; 400 Charging pile; 300 Energy storage device; 210 Energy storage box; 200 Battery pack; 100 Connection structure; 10 Mounting component; 11 First connector; 12 First stop surface; 13 Bracket; 131 Mounting hole; 14 Track structure; 15 First guide part; 16 Second guide part; 17 Guide surface; 20 Connection component; 21 Second connector; 22 Second stop surface; 23 Positioning block; 231 Positioning hole; 24 Guide groove; 25 Groove opening; 26 Groove cavity; 27 Protrusion; 28 Bud; 30 Fastener; L1 First mating clearance; L2 Second mating clearance. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0074] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0075] In the following description, the terms "first," "second," etc., are merely used to distinguish different frames and do not imply any similarity or connection between the frames. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions as shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0076] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0077] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0078] In some embodiments, the energy storage device includes a battery pack, etc.

[0079] During the use of battery packs, they need to be stored in energy storage cabinets or transported in energy storage containers. In related technologies, assembling the battery pack within the mounting frame is difficult, inefficient, and results in poor connection stability between the battery pack and the mounting frame.

[0080] In view of this, the embodiments of this application propose a new technical solution, which is applicable to energy storage devices and energy storage systems and charging networks including energy storage devices.

[0081] Please refer to Figure 1 and Figure 3 , Figure 1 This is a schematic diagram of the structure of a charging network 1000 provided in some embodiments of this application. Figure 3This is a schematic diagram of the structure of an energy storage device 300 provided in some embodiments of this application. Embodiments of this application provide a charging network 1000, which includes a charging pile 400 for charging electrical equipment. The charging network 1000 may also include an energy storage device 300, which is electrically connected to the charging pile 400 and provides power to the charging pile 400.

[0082] It should be noted that the charging pile 400 and the battery pack in the energy storage device 300 are electrically connected via cables, and the battery pack can supply its stored electrical energy to the charging pile 400. The charging pile 400 has a connector that can be connected to electrical equipment, thereby replenishing the energy of the equipment. The application of the energy storage device 300 in this charging network 1000 can effectively improve the safety of the charging network 1000 and also help to improve the flexibility of the charging network 1000 during deployment.

[0083] In a charging network 1000, there can be one charging pile 400, and the energy storage device 300 provides power to the one charging pile 400; there can also be multiple charging piles 400, and the energy storage device 300 provides power to multiple charging piles 400.

[0084] As an example, such as Figure 1 As shown, the charging network 1000 includes an energy storage device 300 and two charging piles 400, with the energy storage device 300 providing power to the two charging piles 400.

[0085] The energy storage device 300 may include a battery pack 200, which is electrically connected to the charging pile 400 so that the battery pack 200 can provide power to the charging pile 400.

[0086] Please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of an energy storage system 2000 provided in some embodiments of this application. Embodiments of this application provide an energy storage system 2000. The energy storage system 2000 includes an energy storage converter 500, which can be electrically connected to a generator 3000 to convert the electrical power provided by the generator 3000. The energy storage system 2000 may further include an energy storage device 300, which is electrically connected to the energy storage converter 500. The energy storage converter 500 converts the electrical energy provided by the generator 3000 and stores it in the energy storage device 300.

[0087] A power conversion device is used to connect the power generation device 3000 and the energy storage device 300. The power generation device 3000 generates electrical energy and stores the generated electrical energy in the energy storage device 300 via the power conversion device. The application of the energy storage device 300 in the energy storage system 2000 can effectively improve the operational safety of the energy storage system 2000. In specific implementations, the power generation equipment can be solar panels, hydroelectric power generation equipment, thermal power generation equipment, etc. This application does not limit the specific type of power generation equipment.

[0088] As an example, such as Figure 2 As shown, the energy storage system 2000 includes an energy storage device 300 and an energy storage converter 500. The two power generation devices 3000 respectively transmit the generated electrical energy to the energy storage converter 500, and the energy storage converter 500 introduces the electrical energy into the energy storage device 300 for storage.

[0089] Please refer to Figure 3 The energy storage device 300 includes an energy storage box 210, and a battery pack 200 is installed inside the energy storage box 210.

[0090] As an example, the energy storage device 300 can be an energy storage container, an energy storage cabinet, etc.

[0091] As an example, energy storage device 300 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage power stations can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. Wind power generation systems collect wind energy from wind turbines, convert it into electrical energy, and store it in energy storage device 300. Solar power generation systems can convert solar energy into electrical energy, store it in energy storage device 300, and supply it to users as needed. Mobile power systems can supply power to relevant electrical equipment in areas where the mains power supply cannot reach, such as remote mountainous areas and remote wilderness areas. Temporary power supply systems can provide power to users when there is insufficient power.

[0092] Please see Figures 4-11This application provides a connection structure 100 for a battery pack 200, used to connect the battery pack 200 to a mounting frame. The connection structure 100 includes a mounting component 10 and a connection component 20. The mounting component 10 is disposed on the mounting frame and includes at least two first connectors 11. The at least two first connectors 11 are spaced apart along a first direction, and any one of the first connectors 11 extends along a second direction, wherein the first direction and the second direction intersect. The connection component 20 is disposed on the battery pack 200 and includes at least two second connectors 21. The at least two second connectors 21 are spaced apart along the first direction, and any one of the second connectors 21 extends along the second direction. The at least two first connectors 11 and the at least two second connectors 21 slide and cooperate in the second direction to form at least two connection units, wherein the cooperation parameters of the two connection units are different.

[0093] The battery pack 200 includes individual battery cells and a battery housing, with the individual battery cells housed within the battery housing.

[0094] The battery cell involved in the embodiments of this application refers to the smallest unit that stores and outputs electrical energy. The battery cell can be a secondary battery or a primary battery. A secondary battery is a battery cell that can be recharged after discharge to activate the active materials and continue to be used.

[0095] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0096] The battery pack 200 is mounted on the mounting frame via the connection structure 100. The mounting frame can be an energy storage box 210.

[0097] The number of first connectors 11 can be 2, 3, 4, etc., and the number of second connectors 21 can be 2, 3, 4, etc. At least two first connectors 11 can increase the contact area between the connection structure 100 and the mounting frame, and at least two second connectors 21 can increase the contact area between the connection structure 100 and the battery pack 200, which is beneficial to improving the installation stability of the battery pack 200 and the mounting frame.

[0098] The first connector 11 and the second connector 21 are in sliding fit, that is, the fit between the first connector 11 and the second connector 21 is a clearance fit. Therefore, the fit parameter of the connecting unit can be the fit clearance between the first connector 11 and the second connector 21.

[0099] In some implementations, the connection component 20 is detachably connected to the bottom of the battery pack 200.

[0100] For example, the connecting assembly 20 can be connected to the bottom of the battery pack 200 by threaded means such as bolts or screws. This facilitates the disassembly, assembly, and replacement of the connecting assembly 20.

[0101] The first direction can be the width direction of the mounting frame, and the second direction can be the length direction of the mounting frame. The first direction is perpendicular to the second direction.

[0102] Any one of the first connectors 11 extends along the second direction, that is, every first connector 11 extends along the second direction. The length of each first connector 11 extending along the second direction can be the same or different.

[0103] Similarly, any one of the second connectors 21 extends along the second direction, that is, every single second connector 21 extends along the second direction. The length of each second connector 21 extending along the second direction can be the same or different.

[0104] When there are two first connectors 11, the two first connectors 11 are symmetrically arranged on both sides of the bottom of the battery pack 200 along the first direction. When there are three first connectors 11, one first connector 11 is located at the center of the bottom of the battery pack 200 along the first direction, and the other two first connectors 11 are symmetrically arranged on both sides of the bottom of the battery pack 200 along the first direction. It should be noted that the two first connectors 11 being symmetrically arranged on both sides of the bottom of the battery pack 200 along the first direction means that the distance between the two first connectors 11 and the center of the bottom of the battery pack 200 along the first direction is equal.

[0105] The dimensions of the first connector 11 and the second connector 21 along the second direction may be greater than, equal to or less than the dimensions of the battery pack 200 along the second direction.

[0106] The number of first connectors 11 and second connectors 21 is equal, so that the first connectors 11 and second connectors 21 can be set in a one-to-one correspondence. In some embodiments, when there are two first connectors 11, there are two second connectors 21, and the two first connectors 11 are respectively connected to the two second connectors 21.

[0107] In the connection structure 100 of this application embodiment, the connection unit with small matching parameters can improve the assembly accuracy of the first connector 11 and the second connector 21, making the connection between the battery pack 200 and the mounting frame stable; the connection unit with large matching parameters can reduce the assembly difficulty of the first connector 11 and the second connector 21, thereby improving the assembly efficiency of the battery pack 200 and the mounting frame.

[0108] Please see Figure 6 and Figure 7In some embodiments, the second connector 21 and the first connector 11 are clearance-fitted to form a connecting unit, wherein one of the connecting units is the first connecting unit, and the clearance of the first connecting unit in the first direction is smaller than the clearance of the other connecting units in the first direction; and / or, the clearance of the first connecting unit in a third direction is smaller than the clearance of the other connecting units in the third direction, wherein the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0109] The third direction can be the height direction of the mounting frame.

[0110] The clearance fit between the second connector 21 and the first connector 11 means that there is a gap between the second connector 21 and the first connector 11. This allows the second connector 21 and the first connector 11 to move relative to each other within the gap range during transportation or when subjected to impact, reducing the probability of damage to the connection structure 100 caused by external influences.

[0111] The fact that the first connecting unit's clearance in the first direction is smaller than the clearance of the other connecting units in the first direction means that among all the connecting units' clearances in the first direction, the first connecting unit has the smallest clearance in the first direction.

[0112] Similarly, the fact that the first connecting unit has a smaller mating clearance in the third direction than the other connecting units in the third direction means that among all the connecting units, the first connecting unit has the smallest mating clearance in the third direction.

[0113] It should be noted that the mating clearance of the first connecting unit in the first direction is smaller than the mating clearance of the other connecting units in the first direction; and / or, the mating clearance of the first connecting unit in a third direction is smaller than the mating clearance of the other connecting units in the third direction, including the following cases:

[0114] The first type: the mating clearance of the first connecting unit in the first direction is smaller than the mating clearance of the other connecting units in the first direction, and the mating clearance of the first connecting unit in the third direction is smaller than the mating clearance of the other connecting units in the third direction.

[0115] The second type: the mating clearance of the first connecting unit in the first direction is smaller than the mating clearance of the other connecting units in the first direction, and the mating clearance of the first connecting unit in the third direction is greater than or equal to the mating clearance of the other connecting units in the third direction.

[0116] The third type: the mating clearance of the first connecting unit in the first direction is greater than or equal to the mating clearance of the other connecting units in the first direction, and the mating clearance of the first connecting unit in the third direction is less than the mating clearance of the other connecting units in the third direction.

[0117] In the above technical solution, the connection unit with a small mating clearance in the first direction can improve the assembly accuracy of the first connector 11 and the second connector 21 in the first direction, and the connection unit with a small mating clearance in the third direction can improve the assembly accuracy of the first connector 11 and the second connector 21 in the third direction, so that the connection between the battery pack 200 and the mounting frame is stable; the connection unit with a large mating clearance in the first direction can reduce the assembly difficulty of the first connector 11 and the second connector 21 in the first direction, and the connection unit with a large mating clearance in the third direction can reduce the assembly difficulty of the first connector 11 and the second connector 21 in the third direction, thereby helping to improve the assembly efficiency of the battery pack 200 and the mounting frame.

[0118] In some embodiments, the second connector 21 and the first connector 11 are clearance-fitted to form a connecting unit, wherein one connecting unit is the first connecting unit and the other connecting unit is the second connecting unit. The clearance of the first connecting unit in the first direction is smaller than the clearance of the other connecting units in the first direction, and the clearance of the second connecting unit in the third direction is smaller than the clearance of the other connecting units in the third direction.

[0119] In other words, the connecting unit with the smallest mating clearance in the first direction and the connecting unit with the smallest mating clearance in the second direction are different connecting units. This allows for selection based on the dimensions of the first connecting member 11 and the second connecting member 21 in the first and third directions, which helps reduce the difficulty of assembling the first connecting member 11 and the second connecting member 21.

[0120] Please see Figure 8 and Figure 10 In some embodiments, the first connector 11 has a first stop surface 12, and the connecting assembly 20 has a second stop surface 22. The first stop surface 12 faces a first side of the second direction, and the second stop surface 22 faces a second side of the second direction. The first side and the second side are opposite sides of the second direction. The first stop surface 12 is used to stop and cooperate with the second stop surface 22 in the second direction.

[0121] It should be noted that the first stop surface 12 is used to stop and cooperate with the second stop surface 22 in the second direction. This means that when the first connecting member 11 and the second connecting member 21 are slid into place, the first stop surface 12 and the second stop surface 22 abut against each other. In other words, when the first stop surface 12 and the second stop surface 22 abut against each other, it means that the first connecting member 11 and the second connecting member 21 have slid into place.

[0122] For example, the first stop surface 12 and the second stop surface 22 are located on opposite sides in the second direction. During the process of connecting the second connector 21 to the first connector 11, the first stop surface 12 and the second stop surface 22 approach each other until they abut against each other. During the process of removing the second connector 21 from the first connector 11, the first stop surface 12 and the second stop surface 22 move away from each other until the first connector 11 and the second connector 21 are separated.

[0123] In the above technical solution, when the first connector 11 and the second connector 21 slide into place, the first stop surface 12 and the second stop surface 22 stop each other in the second direction, so that the first connector 11 cannot continue to slide relative to the second connector 21, thereby reducing the risk of assembly failure caused by excessive sliding of the first connector 11 and the second connector 21.

[0124] In some embodiments, the connection structure 100 includes a fastener 30 for detachably connecting the mounting assembly 10 and the connection assembly 20 when the first connector 11 and the second connector 21 are slid into place.

[0125] The type of fastener 30 is not limited; for example, it can be a screw, bolt, etc.

[0126] Since the mounting component 10 is mounted on the mounting frame and the connecting component 20 is mounted on the battery pack 200, after the first connecting member 11 and the second connecting member 21 are properly engaged, the fastener 30 is tightened onto the mounting component 10 and the connecting component 20, thus securely connecting the mounting component 10 and the connecting component 20 and stably fixing the battery pack 200 onto the mounting frame. After the fastener 30 is removed from the mounting component 10 and the connecting component 20, the mounting component 10 and the connecting component 20 can be slid apart, allowing the battery pack 200 to be separated from the mounting frame.

[0127] In the above technical solution, the fastener 30 can improve the connection stability between the battery pack 200 and the mounting frame, while facilitating the disassembly and assembly of the battery pack 200 and the mounting frame, reducing the assembly difficulty of the battery pack 200 and the mounting frame, thereby improving assembly efficiency.

[0128] Please see Figure 8 and Figure 11 In some embodiments, the mounting assembly 10 includes a bracket 13, a first connector 11 disposed on the bracket 13 and fixed relative to the bracket 13, and a fastener 30 connecting the bracket 13 and the connecting assembly 20. The bracket 13 is used to carry the battery pack 200.

[0129] It should be noted that the bracket 13 is used to support the battery pack 200, meaning that the weight of the battery pack 200 is transferred to the bracket 13 through the connecting structure 100.

[0130] In some embodiments, the bottom surface of the connecting component 20 is close to the bracket 13 relative to the bottom surface of the battery pack 200. That is, the bottom surface of the connecting component 20 is in contact with the surface of the bracket 13, and there is a gap between the bottom surface of the battery pack 200 and the surface of the bracket 13. This can reduce the friction between the battery pack 200 housing and the bracket 13, which is beneficial to protect the coating on the surface of the battery pack 200 housing and the bracket 13, thereby improving the corrosion resistance of the battery pack 200 housing and the bracket 13.

[0131] In the above technical solution, the bracket 13 carries the battery pack 200 and transfers the weight of the battery pack 200 to the bracket 13 through the connecting structure 100. This can reduce the load on the connecting structure 100, which is beneficial to reduce local stress concentration and reduce the risk of the connecting structure 100 breaking.

[0132] Please see Figure 8 In some embodiments, the first connector 11 is detachably connected to the bracket 13.

[0133] For example, the first connector 11 can be connected to the bracket 13 by threaded means such as bolts or screws. This facilitates the disassembly, assembly, and replacement of the first connector 11.

[0134] Please see Figure 10 and Figure 11 In some embodiments, the connecting component 20 includes a positioning block 23 disposed at one end of the second connector 21 along a second direction, the positioning block 23 and the bracket 13 are stacked along a third direction, and the fastener 30 connects the positioning block 23 and the bracket 13.

[0135] For example, the positioning block 23 can be integrally formed with the second connector 21, or it can be fixedly connected by welding, bonding or other methods.

[0136] It should be noted that the positioning block 23 and the bracket 13 are stacked along the third direction. The positioning block 23 can be placed on the surface of the bracket 13 along the third direction, and the top surface of the bracket 13 along the third direction is in contact with the bottom surface of the positioning block 23 along the third direction.

[0137] In some embodiments, a positioning hole 231 is formed on the positioning block 23, and a mounting hole 131 is formed on the bracket 13. When the first connector 11 and the second connector 21 slide into place, the positioning hole 231 and the mounting hole 131 are aligned. The fastener 30 passes through the positioning hole 231 and the mounting hole 131 to fix the first connector 11 and the second connector 21.

[0138] In the above technical solution, the positioning block 23 can be used to position the connecting component 20 and the mounting component 10. The fastener 30 connects the positioning block 23 and the bracket 13, which can fix the second connecting member 21 on the first connecting member 11, limit the second connecting member 21, and reduce the risk of the second connecting member 21 continuing to slide and causing the fit to fail.

[0139] Please see Figure 7 , Figure 12 and Figure 13 In some embodiments, one of the first connector 11 and the second connector 21 includes a track structure 14, and the other has a guide groove 24. The guide groove 24 and the track structure 14 extend along a second direction, and the track structure 14 slides within the guide groove 24 along the second direction.

[0140] For example, the first connector 11 may include a track structure 14 and the second connector 21 may have a guide groove 24, or the first connector 11 may have a guide groove 24 and the second connector 21 may include a track structure 14.

[0141] It should be noted that one of the first connector 11 and the second connector 21 includes a track structure 14, and the other has a guide groove 24. This means that one connector in the connecting unit that is fitted together includes a track structure 14, and the other connector has a guide groove 24.

[0142] In some embodiments, all first connectors 11 include track structures 14, and all second connectors 21 are formed with guide grooves 24. In other embodiments, some first connectors 11 include track structures 14, and other first connectors 11 are formed with guide grooves 24; some second connectors 21 are formed with guide grooves 24, and other second connectors 21 include track structures 14; the first connectors 11 with track structures 14 cooperate with the second connectors 21 with guide grooves 24.

[0143] The sliding of the track structure 14 in the guide groove 24 along the second direction means that the track structure 14 and the guide groove 24 slide relative to each other in the second direction. This can be either the connecting member with the guide groove 24 is fixed and the connecting member with the track structure 14 slides in the second direction, or the connecting member with the track structure 14 is fixed and the connecting member with the guide groove 24 slides in the second direction.

[0144] In the above technical solution, the track structure 14 and the guide groove 24 cooperate to provide guidance for the sliding of the first connector 11 and the second connector 21, thereby improving the sliding stability of the first connector 11 and the second connector 21.

[0145] Please see Figure 7 , Figure 12 and Figure 13 In some embodiments, the guide groove 24 includes a slot 25 facing the track structure 14 in a third direction, and a cavity 26 extending away from the track structure 14 in a third direction from the slot 25. The dimension of the cavity 26 in a first direction is larger than the dimension of the slot 25 in the first direction. The track structure 14 includes a first guide portion 15 and a second guide portion 16, which are arranged in a third direction. The dimension of the second guide portion 16 in the first direction is larger than the dimension of the first guide portion 15 in the first direction and larger than the dimension of the slot 25 in the first direction. The second guide portion 16 is located in the cavity 26, and the first guide portion 15 passes through the slot 25.

[0146] For example, when the first connector 11 includes a track structure 14 and the second connector 21 forms a guide groove 24, the guide groove 24 can be a T-shaped groove and the track structure 14 can be a T-shaped structure. That is, the groove opening 25 can be located below the cavity 26, and the first guide portion 15 can be located below the second guide portion 16. When the first connector 11 forms a guide groove 24 and the second connector 21 includes a track structure 14, the guide groove 24 can be an L-shaped groove and the track structure 14 can be an L-shaped structure. That is, the groove opening 25 can be located above the cavity 26, and the first guide portion 15 can be located above the second guide portion 16.

[0147] The shape and size of the track structure 14 can match the shape and size of the guide groove 24, and the first guide part 15 and the second guide part 16 can be integrally formed.

[0148] The dimension of the first guide portion 15 along the first direction can be smaller than the dimension of the slot 25 along the first direction, so that the first guide portion 15 can pass through the slot 25 along the third direction, which is beneficial to restricting the range of movement of the first guide portion 15 in the first direction.

[0149] The dimension of the second guide portion 16 along the first direction can be smaller than the dimension of the cavity 26 along the first direction, so that the first guide portion 15 can be entirely located in the cavity 26, which is beneficial to restricting the range of motion of the second guide portion 16 in the first direction.

[0150] The second guide portion 16 is larger in size along the first direction than the first guide portion 15 and the slot 25 in the first direction. This helps to limit the range of motion of the second guide portion 16 in the third direction and reduce the risk of slippage between the track structure 14 and the guide slot 24.

[0151] Please see Figure 6 , Figure 7 , Figure 12 and Figure 13 In some embodiments, the track structure 14 forms a first fitting gap L1 between its sidewall in the first direction and the guide groove 24, and a second fitting gap L2 is formed between the surface of the second guide portion 16 facing the first guide portion 15 and the surface of the groove cavity 26 facing the second guide portion 16; the first fitting gap L1 of the first connecting unit is smaller than the first fitting gap L1 of the other connecting units; and / or, the second fitting gap L2 of the first connecting unit is smaller than the second fitting gap L2 of the other connecting units.

[0152] It should be noted that the first mating clearance L1 can be the clearance formed between the side wall of the first guide portion 15 in the first direction and the side wall of the groove 25 in the first direction, or it can be the clearance formed between the side wall of the second guide portion 16 in the first direction and the side wall of the groove 26 in the first direction.

[0153] The first mating gap L1 of the first connecting unit is smaller than the first mating gap L1 of the other connecting units, meaning that among all the first mating gaps L1 of the connecting units, the first mating gap L1 of the first connecting unit is the smallest.

[0154] Similarly, the second mating gap L2 of the first connecting unit is smaller than the second mating gap L2 of the other connecting units, meaning that among all the second mating gaps L2 of the connecting units, the second mating gap L2 of the first connecting unit is the smallest.

[0155] It should be noted that the first mating clearance L1 of the first connecting unit is smaller than the first mating clearance L1 of the other connecting units; and / or, the second mating clearance L2 of the first connecting unit is smaller than the second mating clearance L2 of the other connecting units, including the following cases:

[0156] The first type: the first mating gap L1 of the first connecting unit is smaller than the first mating gap L1 of the other connecting units, and the second mating gap L2 of the first connecting unit is smaller than the second mating gap L2 of the other connecting units.

[0157] The second type: the first mating gap L1 of the first connecting unit is smaller than the first mating gap L1 of the other connecting units, and the second mating gap L2 of the first connecting unit is greater than or equal to the second mating gap L2 of the other connecting units.

[0158] The third type: the first mating gap L1 of the first connecting unit is greater than or equal to the first mating gap L1 of the other connecting units, and the second mating gap L2 of the first connecting unit is less than the second mating gap L2 of the other connecting units.

[0159] In the above technical solution, the connecting unit with a small first mating gap L1 can improve the assembly accuracy of the track structure 14 and the guide groove 24 in the first direction, and the connecting unit with a small second mating gap L2 can improve the assembly accuracy of the track structure 14 and the guide groove 24 in the third direction, so that the battery pack 200 and the mounting frame are connected stably. The connecting unit with a large first mating gap L1 can reduce the assembly difficulty and manufacturing accuracy requirements of the track structure 14 and the guide groove 24 in the first direction, and the connecting unit with a large second mating gap L2 can reduce the assembly difficulty and manufacturing accuracy requirements of the track structure 14 and the guide groove 24 in the third direction, which helps to reduce manufacturing costs and improve assembly efficiency.

[0160] In some embodiments, the first mating gap L1 of the first connecting unit is smaller than the first mating gap L1 of the other connecting units, and the second mating gap L2 of the second connecting unit is smaller than the second mating gap L2 of the other connecting units.

[0161] In other words, the connecting unit with the smallest first mating gap L1 and the connecting unit with the smallest second mating gap L2 are different connecting units. This allows for selection based on the dimensions of the track structure 14 and the guide groove 24 in the first and third directions, which helps reduce the difficulty of assembling the track structure 14 and the guide groove 24.

[0162] Please see Figure 13 In some embodiments, the connector with the guide groove 24 protrudes outward along a third direction from the surface portion opposite to the groove 25 and forms a protrusion 27.

[0163] In some embodiments, the first connector 11 includes a track structure 14, and the second connector 21 forms a guide groove 24. The second connector 21 may extend a portion of its top surface in a third direction away from the groove opening 25 to form a protrusion 27. The surface of the groove cavity 26 facing away from the groove opening 25 in a third direction is flat. That is, the thickness of the top wall of the second connector 21 in the third direction is inconsistent, with the thickness of the top wall forming the protrusion 27 being greater than the thickness of the remaining top wall portions. Alternatively, the second connector 21 may extend a portion of its top surface in a third direction away from the groove opening 25, and the surface of the groove cavity 26 facing away from the groove opening 25 in a third direction extends in a direction away from the groove opening 25. That is, the thickness of the top wall of the second connector 21 in the third direction is consistent, with the thickness of the top wall forming the protrusion 27 being equal to the thickness of the remaining top wall portions.

[0164] In the above technical solution, the protrusion 27 can increase the contact area and structural strength of the connector, which is beneficial to improving the connection stability of the mounting component 10 and the connecting component 20.

[0165] Please see Figure 8 , Figure 10 , Figure 12 and Figure 13In some embodiments, the first connector 11 includes a track structure 14, the second connector 21 forms a guide groove 24, a positioning block 23 is disposed on a first side of the guide groove 24 facing the second direction, and the positioning block 23 blocks at least part of the guide groove 24, the first side of the track structure 14 facing the second direction forms a first stop surface 12, and the second side of the positioning block 23 facing the second direction forms a second stop surface 22, wherein the first side and the second side are opposite sides of the second direction, and the first stop surface 12 is used to stop and cooperate with the second stop surface 22 in the second direction.

[0166] For example, the positioning block 23 is disposed at the end of the guide groove 24 on the first side facing the second direction, the first stop surface 12 is the end face of the track structure 14 on the first side facing the second direction, and the second stop surface 22 is the end face of the positioning block 23 on the second side facing the second direction.

[0167] During the sliding of the second connector 21 toward the second side in the second direction, the first stop surface 12 and the second stop surface 22 approach each other. When the second connector 21 slides into place, the first stop surface 12 and the second stop surface 22 abut against each other in the second direction, restricting the second connector 21 from continuing to slide toward the second side in the second direction.

[0168] Since the track structure 14 cooperates with the guide groove 24, the positioning block 23 blocks at least part of the guide groove 24, so that when the first connector 11 and the second connector 21 slide into place, the second stop surface 22 of the positioning block 23 can cooperate with at least part of the first stop surface 12 of the track structure 14.

[0169] In the above technical solution, when the first connector 11 and the second connector 21 slide into place, the first stop surface 12 and the second stop surface 22 stop each other in the second direction, so that the first connector 11 cannot continue to slide relative to the second connector 21, thereby reducing the risk of assembly failure caused by excessive sliding of the first connector 11 and the second connector 21.

[0170] Please see Figure 8 , Figure 10 and Figure 14 In some embodiments, a portion of the positioning block 23 protrudes along a third direction away from the bracket 13 to form a protrusion 28, which is inserted into the guide groove 24.

[0171] It is possible that the end face of the positioning block 23 facing the second direction abuts against the end face of the track structure 14 facing the first direction, that is, the protrusion 28 protrudes from the top surface of the positioning block 23 along the third direction to the side away from the bracket 13. Alternatively, the end face of the protrusion 28 facing the second direction abuts against the end face of the track structure 14 facing the first direction, that is, the protrusion 28 protrudes from the side of the positioning block 23 along the second direction towards the guide groove 24 to the side away from the bracket 13 and towards the guide groove 24.

[0172] The protrusion 28 is inserted in the guide groove 24, which means that the protrusion 28 can be entirely located in the groove opening 25, entirely located in the groove cavity 26, or partially located in the groove opening 25 and partially located in the groove cavity 26.

[0173] In the above technical solution, the protrusion 28 can increase the structural strength of the positioning block 23, which is beneficial to improving the connection stability of the mounting component 10 and the connecting component 20.

[0174] Please see Figure 15 In some embodiments, the track structure 14 is provided with a guide surface 17, which is connected to the surface of the track structure 14 along a first direction and the surface of the track structure 14 along a second direction.

[0175] For example, the track structure 14 is provided with two guide surfaces 17, which are symmetrically arranged along a first direction. One guide surface 17 connects the left side of the track structure 14 along the first direction and the front end of the track structure 14 along the second direction, and the other guide surface 17 connects the right side of the track structure 14 along the first direction and the front end of the track structure 14 along the second direction.

[0176] The guide surface 17 can be a plane or an arc surface.

[0177] In the above technical solution, when the track structure 14 and the guide groove 24 are engaged, the connector with the guide groove 24 can slide along the guide surface 17 to adjust the position of the guide groove 24 relative to the track structure 14, which is beneficial to align the guide groove 24 and the track structure 14, thereby improving the assembly efficiency of the first connector 11 and the second connector 21.

[0178] Please see Figure 4 , Figure 8 and Figure 9 This application provides an energy storage device 300, including a battery pack 200, a mounting frame, and a connection structure 100 as described in any embodiment of this application. The connection component 20 is disposed on the battery pack 200, and the mounting component 10 is disposed on the mounting frame.

[0179] In the above technical solution, by adopting the connection structure 100 mentioned above, the connection stability between the battery pack 200 and the mounting frame can be improved, while the assembly and disassembly of the battery pack 200 and the mounting frame can be facilitated, the assembly difficulty of the battery pack 200 and the mounting frame can be reduced, thereby improving the assembly efficiency of the energy storage device 300.

[0180] Please see Figure 10 and Figure 11 In some embodiments, when the first connector 11 and the second connector 21 are slid into place, the first end of the mounting assembly 10 along the second direction and the first end of the connecting assembly 20 along the second direction both extend beyond the battery pack 200, and the first end of the connecting assembly 20 and the first end of the mounting assembly 10 are connected by fasteners 30.

[0181] It should be noted that the first end of the mounting component 10 extending beyond the battery pack 200 in the second direction can be the first end of the bracket 13 extending beyond the battery pack 200 in the second direction, and the first end of the connecting component 20 extending beyond the battery pack 200 in the second direction can be the first end of the positioning block 23 extending beyond the battery pack 200 in the second direction.

[0182] The first end of the second direction can be the end of the positioning block 23 that is away from the guide groove 24.

[0183] In the above technical solution, the first end of the mounting component 10 along the second direction and the first end of the connecting component 20 along the second direction both extend beyond the battery pack 200, which can provide installation space for the fastener 30, so that the fastener 30 can install the connecting component 20 onto the mounting component 10 from the part that extends beyond the battery pack 200.

[0184] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0185] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A connection structure for a battery pack, characterized in that, The connection structure is used to connect the battery pack to the mounting frame, including: An installation component is disposed on an installation frame. The installation component includes at least two first connectors, which are spaced apart along a first direction. Any one of the first connectors extends along a second direction, wherein the first direction and the second direction intersect. A connection component is disposed in a battery pack, the connection component including at least two second connectors, the at least two second connectors being spaced apart along a first direction, and any one of the second connectors extending along the second direction; The at least two first connectors and the at least two second connectors slide in the second direction to form at least two connecting units, wherein the two connecting units have different mating parameters in the first direction and / or the third direction, wherein the third direction is perpendicular to the first direction and perpendicular to the second direction; The connection structure includes a fastener for detachably connecting the mounting assembly and the connection assembly when the first connector and the second connector are slid into place; One of the first connector and the second connector includes a track structure, and the other has a guide groove. The guide groove and the track structure extend along the second direction, and the track structure slides within the guide groove along the second direction.

2. The connection structure according to claim 1, characterized in that, The second connector and the first connector are clearance-fitted to form a connection unit, wherein one of the connection units is the first connection unit; The first connecting unit has a smaller mating gap in the first direction than the other connecting units in the first direction; and / or, the first connecting unit has a smaller mating gap in a third direction than the other connecting units in that third direction.

3. The connection structure according to claim 1, characterized in that, The second connector and the first connector are clearance-fitted to form a connecting unit, wherein one of the connecting units is a first connecting unit and the other connecting unit is a second connecting unit; The first connecting unit has a smaller mating gap in the first direction than the other connecting units in the first direction, and the second connecting unit has a smaller mating gap in the third direction than the other connecting units in the third direction.

4. The connection structure according to claim 1, characterized in that, The first connector has a first stop surface, and the connecting assembly has a second stop surface. The first stop surface faces a first side in the second direction, and the second stop surface faces a second side in the second direction, wherein the first side and the second side are opposite sides in the second direction. The first stop surface is used to stop and cooperate with the second stop surface in the second direction.

5. The connection structure according to claim 1, characterized in that, The mounting assembly includes a bracket, a first connector is disposed on the bracket and fixed relative to the bracket, a fastener connects the bracket and the connecting assembly, and the bracket is used to carry the battery pack.

6. The connection structure according to claim 5, characterized in that, The first connector is detachably connected to the bracket; and / or, the connecting assembly includes a positioning block disposed at one end of the second connector along the second direction, the positioning block and the bracket being stacked along the third direction, and the fastener connecting the positioning block and the bracket.

7. The connection structure according to claim 1, characterized in that, The guide groove includes a slot facing the track structure along a third direction, and also includes a cavity extending away from the track structure along the third direction from the slot, wherein the dimension of the cavity along the first direction is greater than the dimension of the slot along the first direction; The track structure includes a first guide portion and a second guide portion, the first guide portion and the second guide portion are arranged along the third direction, the dimension of the second guide portion along the first direction is greater than the dimension of the first guide portion along the first direction, and is greater than the dimension of the slot along the first direction; The second guide portion is located in the groove cavity, and the first guide portion passes through the groove opening.

8. The connection structure according to claim 7, characterized in that, The track structure forms a first fitting gap between its sidewall in the first direction and the guide groove in the first direction, and a second fitting gap forms between the surface of the second guide portion facing the first guide portion and the surface of the groove cavity facing the groove opening. The second connector and the first connector are clearance-fitted to form a connection unit, wherein one of the connection units is the first connection unit; The first mating gap of the first connecting unit is smaller than the first mating gap of the other connecting units; and / or, the second mating gap of the first connecting unit is smaller than the second mating gap of the other connecting units.

9. The connection structure according to claim 7, characterized in that, The track structure forms a first fitting gap between its sidewall in the first direction and the guide groove in the first direction, and a second fitting gap forms between the surface of the second guide portion facing the first guide portion and the surface of the groove cavity facing the groove opening. The second connector and the first connector are clearance-fitted to form a connecting unit, wherein one of the connecting units is a first connecting unit and the other connecting unit is a second connecting unit; The first mating gap of the first connecting unit is smaller than the first mating gap of the other connecting units, and the second mating gap of the second connecting unit is smaller than the second mating gap of the other connecting units.

10. The connection structure according to claim 7, characterized in that, The surface portion of the connector with the guide groove protrudes outward along a third direction away from the groove opening and forms a protrusion.

11. The connection structure according to claim 7, characterized in that, The mounting assembly includes a bracket, a first connector is disposed on the bracket and fixed relative to the bracket, a fastener connects the bracket and the second connector, and the bracket is used to carry the battery pack; The first connector includes the track structure, the second connector forms the guide groove, the connecting assembly includes a positioning block, the positioning block and the bracket are stacked along the third direction, and the fastener connects the positioning block and the bracket; The positioning block is disposed on the first side of the guide groove facing the second direction, and the positioning block covers at least part of the guide groove. The first side of the track structure facing the second direction forms a first stop surface, and the second side of the positioning block facing the second direction forms a second stop surface. The first side and the second side are opposite sides of the second direction, and the first stop surface is used to stop and cooperate with the second stop surface in the second direction.

12. The connection structure according to claim 11, characterized in that, A portion of the positioning block protrudes along the third direction away from the bracket to form a protrusion, which is inserted into the guide groove.

13. An energy storage device, characterized in that, include: Battery pack; Mounting framework; The connection structure according to any one of claims 1-12, wherein the connection component is disposed on the battery pack and the mounting component is disposed on the mounting frame.

14. The energy storage device according to claim 13, characterized in that, When the first connector and the second connector are slid into place, the first end of the mounting component along the second direction and the first end of the connecting component along the second direction both extend beyond the battery pack, and the first end of the connecting component and the first end of the mounting component are connected by fasteners.

15. The energy storage device according to claim 13, characterized in that, The connection assembly is detachably connected to the bottom of the battery pack.

16. An energy storage system comprising a power conversion device and an energy storage device as claimed in any one of claims 13-15, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

17. A charging network comprising a charging pile and an energy storage device as claimed in any one of claims 13-15 or an energy storage system as claimed in claim 16, wherein the energy storage device is used to provide electrical energy to the charging pile.

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