Energy storage device

Abstract

The embodiment of the utility model provides energy storage equipment, and relates to the technical field of batteries. The energy storage equipment comprises a containing device and a battery pack, the containing device comprises a first wall, the battery pack is placed on the first wall, the battery pack comprises a plurality of battery devices sequentially stacked in the first direction, the first direction is the arrangement direction from the battery pack to the first wall, and one of every two adjacent battery devices is provided with a first connecting part; and the other connecting part is provided with a second connecting part connected with the first connecting part. Stacking of the battery devices is achieved through butt joint of the first connecting parts and the second connecting parts of the battery devices, compared with the mode that the battery devices are stacked through a built-in frame in the related technology, the structure and assembly are simplified, the overall production cost of the energy storage equipment is reduced, occupation of the internal space of the containing device is reduced, and the storage efficiency is improved. And thus, the energy density of the energy storage equipment can be improved to a certain extent.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage, and more particularly, to an energy storage device. Background Art

[0002] Energy storage devices generally include a box body, a frame, and a battery device. The frame inside the box body is used to support battery cells. The frame is not only complex in structure and cumbersome in assembly, resulting in high production costs and low efficiency of energy storage devices, but also occupies the internal space of the box body, reducing the overall energy density of the energy storage device. Therefore, how to reduce costs and increase efficiency in the production of energy storage devices and improve their energy density is a research direction in battery technology. Summary of the Utility Model

[0003] The present application provides an energy storage device, which can reduce costs and increase efficiency in the production of energy storage devices and improve their energy density.

[0004] In a first aspect, an embodiment of the present application provides an energy storage device, including a containing device and a battery pack. The containing device includes a first wall, and the battery pack is placed on the first wall. The battery pack includes a plurality of battery devices stacked in sequence along a first direction. The first direction is the arrangement direction from the battery pack to the first wall. One of the adjacent two battery devices is provided with a first connection portion, and the other is provided with a second connection portion that is positioned and connected to the first connection portion. The adjacent two battery devices are kept relatively fixed through the positioning connection of the first connection portion and the second connection portion.

[0005] By adopting the above technical solution, the containing device and the battery device are improved. The stacking of the battery devices is realized by docking the first connection portion and the second connection portion of the battery device itself. Compared with the method of stacking battery devices through an internal frame in the related art, the structure and assembly are simplified, the overall production cost of the energy storage device is reduced, and the occupation of the internal space of the containing device is reduced. Furthermore, the energy density of the energy storage device can be improved to a certain extent.

[0006] In some embodiments of the present application, the first connection portion is inserted into the second connection portion.

[0007] By adopting the above technical solution, the first connection portion and the second connection portion are designed to be inserted, with a simple structure and convenient docking of adjacent two battery devices.

[0008] In some embodiments of the present application, the first connection portion includes a jack, and the second connection portion includes a plug that is inserted into the jack.

[0009] By adopting the above technical solution, the first connection portion is designed to include a jack, and the second connection portion is designed to include a plug. The jack and the plug have a simple structure and are easy to process.

[0010] In some embodiments of the present application, a first insulating pad is installed between the plug and the socket.

[0011] With the above technical solution, a first insulating pad is provided between the plug and the socket, and a first insulating pad is provided between the socket and the plug. The insulating effect of the first insulating pad is used to reduce the possibility of short circuit between two adjacent battery devices.

[0012] In some embodiments of the present application, the first insulating pad includes a first elastic material layer.

[0013] With the above technical solution, the elasticity of the first elastic material layer can elastically support the upper battery device, reducing the disturbance of the internal structure of the upper battery device during installation and transportation.

[0014] In some embodiments of the present application, the accommodating device further includes a positioning member installed on the first wall. The positioning member is connected to the battery pack and limits the displacement of the battery pack in the second direction and the third direction. The first direction, the second direction, and the third direction intersect pairwise.

[0015] With the above technical solution, the accommodating device is designed to further include a positioning member, and the positioning member is used to limit the displacement of the battery pack in the second direction and the third direction, improving the stability of the battery pack placed in the accommodating device.

[0016] In some embodiments of the present application, the length direction of the positioning member is arranged along the first direction and at least penetrates the battery device adjacent to the first wall.

[0017] With the above technical solution, the positioning member is designed to penetrate the battery device adjacent to the first wall, which is convenient for installation and can limit the battery device and the other battery devices thereon.

[0018] In some embodiments of the present application, each of the battery devices is provided with the first connecting portion and the connecting portion, and the positioning member penetrates the first connecting portion and the second connecting portion of the battery device adjacent to the first wall.

[0019] With the above technical solution, the positioning member is designed to penetrate the first connecting portion and the second connecting portion of the battery device adjacent to the first wall, so that the first connecting portion and the second connecting portion are not only used for connecting the battery devices on the upper and lower sides, but also can be in limiting cooperation with the positioning member, with multiple functions in one body and a clever structure.

[0020] In some embodiments of the present application, the positioning member penetrates the first connecting portion and the second connecting portion of each battery device of the battery pack.

[0021] With the above technical solution, by designing the positioning member as the first connecting portion and the second connecting portion that penetrate all the battery devices of the battery pack, the limiting effect on the overall battery pack can be improved, and further the stability of the position of the battery pack in the accommodating device can be improved.

[0022] In some embodiments of the present application, the first connecting portion is provided on one side of each battery device along the first direction, and the second connecting portion is provided on the other side.

[0023] With the above technical solution, each battery device is configured to be provided with a first connecting portion and a second connecting portion, so that when the battery device is installed inside the accommodating device, any one battery device can be used as the bottommost battery device, which facilitates the assembly of the battery device.

[0024] In some embodiments of the present application, the battery device includes a first box body and at least one battery cell located inside the first box body, and the first box body is provided with the first connecting portion and the second connecting portion.

[0025] With the above technical solution, since the first box body includes battery cells and the first connecting portion and the second connecting portion are provided on the first box body, the processing and forming of the first connecting portion and the second connecting portion can be facilitated.

[0026] In some embodiments of the present application, the first box body includes a second wall and a third wall opposite to each other along the first direction, and a first side wall connected between the second wall and the third wall. The second wall is disposed close to the first wall, the third wall is disposed away from the first wall, and the first connecting portion is provided on one side of the first side wall along the first direction, and the second connecting portion is provided on the other side.

[0027] With the above technical solution, by disposing the first connecting portion and the second connecting portion on the first side wall of the box body, the internal space of the box body will not be occupied, and when the first connecting portion and the second connecting portion are docked, the internal battery cells will not be disturbed.

[0028] In some embodiments of the present application, the first side wall is provided with a corner, the first connecting portion is disposed on one side of the corner along the first direction, and the second connecting portion is disposed on the other side of the corner along the first direction.

[0029] With the above technical solution, the first connecting portion and the second connecting portion are provided at the corner of the first side wall. The structural stability and strength at the corner are greater than other positions of the first side wall. Therefore, the stability after connection of two adjacent battery devices can be improved.

[0030] In some embodiments of the present application, the first side wall is provided with a supporting surface facing away from the first wall, the supporting surface is provided with the second connecting portion, and is used to carry the adjacent battery device.

[0031] With the above technical solution, after the second connecting portion is docked with the first connecting portion of the upper battery device, the first side wall is used to support the adjacent upper battery device, and the first side wall can provide a good supporting effect.

[0032] In some embodiments of the present application, the minimum dimensions of the supporting surface around the second connecting portion in the second direction and the third direction are greater than or equal to 2 mm, and the first direction, the second direction, and the third direction intersect pairwise.

[0033] With the above technical solution, the supporting surface around the second connecting portion and the upper battery device have a larger contact area, providing a more stable supporting force.

[0034] In some embodiments of the present application, a second insulating pad is provided between the supporting surface and the adjacent battery device.

[0035] With the above technical solution, a second insulating pad is installed between the supporting surface and the adjacent battery device, and the adjacent two battery devices are insulated by the insulating pad, further reducing the possibility of short circuit between the adjacent two battery devices.

[0036] In some embodiments of the present application, the second insulating pad includes a second elastic material layer.

[0037] With the above technical solution, the elasticity of the second elastic material layer can elastically support the upper battery device, reducing the disturbance to its internal structure during installation and transportation of the upper battery device.

[0038] In some embodiments of the present application, the first side wall is provided with reinforcing ribs.

[0039] With the above technical solution, reinforcing ribs are provided on the first side wall, which can improve the structural strength of the first side wall, thereby better supporting and protecting the battery cells inside the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the drawings without creative efforts.

[0041] Figure 1Schematic structural diagram of an energy storage device provided by some embodiments of the present application;

[0042] Figure 2 Top view of an energy storage device provided by some embodiments of the present application;

[0043] Figure 3 is Figure 2 A - A sectional view of;

[0044] Figure 4 Schematic structural diagram of a first box body provided by some embodiments of the present application;

[0045] Figure 5 Side view of a first box body provided by some embodiments of the present application;

[0046] Figure 6 Top view of a first box body provided by some embodiments of the present application;

[0047] Figure 7 is Figure 6 B - B sectional view of;

[0048] Figure 8 is Figure 6 C - C sectional view of;

[0049] Figure 9 Schematic structural diagram of a battery pack formed by stacking a plurality of battery devices provided by some embodiments of the present application;

[0050] Figure 10 Top view of a battery pack formed by stacking a plurality of battery devices provided by some embodiments of the present application;

[0051] Figure 11 is Figure 10 D - D sectional view of;

[0052] Figure 12 is Figure 11 Enlarged view of part a of;

[0053] Figure 13 is Figure 10 E - E sectional view of;

[0054] Figure 14 is Figure 13 Enlarged view of part b of.

[0055] The reference numerals in the specific embodiments are as follows:

[0056] 100, energy storage device;

[0057] 10, accommodating device; 11, second box body; 111, first wall; 112, second side wall; 12, positioning member;

[0058] 20. Battery pack; 21. Battery device; 211. First connection part; 2111. Jack; 212. Second connection part; 2121. Plug; 22. First insulating pad; 221. First elastic material layer; 23. First box body; 231. First side wall; 2311. Positioning hole; 2312. Reinforcing rib; 2313. Support surface; 2314. Step; 232. Second wall; 233. Third wall; 24. Battery cell; 25. Second insulating pad; 251. Second elastic material layer;

[0059] X. First direction; Y. Second direction; Z. Third direction. Detailed implementation manners

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some but not all of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0061] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of this application in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0062] Referring to "embodiments" in this application means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0063] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] The term "and / or" in this application merely describes the association relationship of associated objects, indicating that there can be three relationships. For example, H and / or B can represent three situations: H exists alone, H and B exist simultaneously, and B exists alone. Additionally, in this application, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0065] In the embodiments of this application, the same reference numerals represent the same components. And for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components shown in the drawings of the embodiments of this application, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to this application.

[0066] The term "a plurality of" as used in this application refers to two or more (including two).

[0067] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0068] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with cable ties.

[0069] In some embodiments, the battery apparatus can be a battery pack, and the battery pack includes a battery box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the battery box body.

[0070] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the battery box body by fixing the battery module in the battery box body.

[0071] As an example, the battery cell assembly can also be accommodated in the battery box body by directly fixing a plurality of battery cells to the battery box body.

[0072] As an example, the battery box body may include a first box body and a second box body. The first box body and the second box body are snapped together so that a closed space is formed inside the battery box body to accommodate the battery cell assembly. Here, "closed" means covered or closed, which can be sealed or non-sealed. The first box body can be a top cover or a bottom plate.

[0073] As an example, the battery box body may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the battery box body to accommodate the battery cell components.

[0074] As an example, the battery box body can be part of the chassis structure of a vehicle. For example, the top cover of the battery box body can become at least part of the floor of the vehicle, or the frame of the battery box body can become at least part of the cross beam and longitudinal beam of the vehicle.

[0075] The technical solutions described in the embodiments of this application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0076] The battery cells mentioned in the embodiments of this application may include an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode tab and the negative electrode tab. The positive electrode tab includes a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector includes a positive electrode coating area and a positive electrode tab connected to the positive electrode coating area. The positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode tab is not coated with a positive electrode active material layer. Taking a lithium-ion battery cell as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode tab includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area. The negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with a negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0077] The energy storage device integrates the battery device in a container or other accommodating device, realizing the rapid integration and rapid commissioning of the battery device. The energy storage device generally includes an accommodating device such as a box body and a battery frame installed in the accommodating device, and uses the battery frame to place multiple battery devices.

[0078] The energy storage device with such a structure has the following disadvantages:

[0079] First, the battery frame structure is complex and heavy, and multiple assembly processes are required to install the battery frame in the accommodating device, and then the battery devices are installed in the battery frame one by one, resulting in low assembly efficiency and high production costs.

[0080] Second, the battery frame occupies a large amount of space inside the accommodating device, resulting in a small number of battery devices that the accommodating device can accommodate, and thus the energy density of the energy storage device cannot be effectively improved.

[0081] Therefore, how to reduce costs and increase efficiency in the production of energy storage devices and improve the energy density is an important topic in the research and development of energy storage devices and their related components.

[0082] In view of this, the present application provides a technical solution, aiming to solve the above technical problems by canceling the battery frame and using the connection of the battery devices themselves to stack multiple battery devices.

[0083] The following describes the energy storage device 100 provided in this embodiment with reference to the attached Figure 1-14 The energy storage device 100 provided in this embodiment will be introduced.

[0084] With reference to the attached Figure 1-3 As shown, the embodiment of the present application provides an energy storage device 100, including an accommodating device 10 and a battery pack 20. The accommodating device 10 includes a first wall 111, and the battery pack 20 is placed on the first wall 111. The battery pack 20 includes a plurality of battery devices 21 stacked in sequence along a first direction X. The first direction X is the arrangement direction of the battery pack 20 to the first wall 111. One of the adjacent two battery devices 21 is provided with a first connecting portion 211, and the other is provided with a second connecting portion 212 that is positioned and connected to the first connecting portion 211. The adjacent two battery devices 21 are kept relatively fixed through the positioning connection of the first connecting portion 211 and the second connecting portion 212.

[0085] The accommodating device 10 may include the second box body 11 in the figure. The second box body 11 includes a first wall 111 and second side walls 112 connected to the periphery of the first wall 111. In some embodiments, the first wall 111 may be the bottom wall of the second box body 11.

[0086] It should be noted that in order to facilitate the display of the internal structure of the second box body 11, the top wall and one of the side walls of the second box body 11 are omitted in this embodiment.

[0087] In some embodiments, the second box body 11 may be made of metal materials such as aluminum alloy and stainless steel, or may be made of polymer materials (such as plastics) with a certain structural strength.

[0088] The battery pack 20 in this embodiment refers to a structure formed by a plurality of battery devices 21 stacked along the first direction X in the figure. Two adjacent battery devices 21 in the battery pack 20 can be conductively connected or not. The battery device 21 can be a battery pack having a protection structure (the following first box body 23) and at least one battery cell 24 located inside the protection structure, or can be a single battery cell 24.

[0089] The first direction X can be the vertical direction during the actual application of the energy storage device 100. Therefore, the orientation words such as "up" and "down" described in this embodiment are also based on the first direction X being the vertical direction.

[0090] The number of battery packs 20 can be one or more. When the number of multiple battery packs 20 is multiple, and multiple battery packs 20 are adjacent in sequence and fill the internal space of the second box body 11, the energy storage device 100 in this embodiment may not have the following positioning member 12.

[0091] One of two adjacent battery devices 21 is provided with a first connection portion 211, and the other is provided with a second connection portion 212 that is positioned and connected to the first connection portion 211. The "positioning connection" between the first connection portion 211 and the second connection portion 212 refers to a mechanical connection, rather than a communication connection or a conductive connection.

[0092] "Positioning connection" can be understood as being used to fix the relative positions of the two connected battery devices 21. Further, the positioning connection that enables two adjacent battery devices 21 to remain relatively fixed means that after being positioned and connected through the first connection portion 211 and the second connection portion 212, they can at least remain relatively fixed along the direction parallel to the upper surface of the first wall 111 (including the second direction Y and the third direction Z in the figure). In some embodiments, they can also remain relatively fixed along the first direction X.

[0093] In some embodiments, it can be that the upper side of the lower battery device 21 is provided with the first connection portion 211, and the lower side of the upper battery cell 24 is provided with the second connection portion 212, or it can be that the upper battery device 21 is provided with the first connection portion 211, and the lower battery cell 24 is provided with the second connection portion 212.

[0094] Taking the upper side of the lower battery device 21 being provided with the first connection portion 211 as an example, the battery device 21 adjacent to the first wall 111 and located at the lowermost layer can be provided with only the first connection portion 211 and not the second connection portion 212, because there is no need to dock with a battery device 21 below this battery device 21.

[0095] Similarly, the battery device 21 located at the uppermost layer may also be provided only with the second connection portion 212 without the first connection portion 211, because there is no need to dock with the battery device 21 above the battery device 21.

[0096] Of course, it is also possible that each battery device 21 is provided with a first connection portion 211 and a second connection portion 212 as described below, and the specific advantages of this method are given below.

[0097] Different from the method of stacking the battery devices 21 by using a frame inside the second box body 11 in the related art, the energy storage device 100 of this embodiment improves the battery device 21 itself, and realizes the stacking of the battery devices 21 by docking the first connection portion 211 and the second connection portion 212 of the battery device 21 itself, which can simplify the structure and assembly steps, reduce the overall production cost of the energy storage device 100, and reduce the occupation of the internal space of the accommodating device 10, and thus can improve the energy density of the energy storage device 100 to a certain extent.

[0098] There are various connection methods between the first connection portion 211 and the second connection portion 212. For example, the two are docked through a detachable connection. The detachable connection has the advantage of being convenient for disassembly and assembly. The detachable connection includes bolt connection, snap connection, and plug connection described below, etc., and this embodiment will not list them one by one.

[0099] Combined with the attached Figure 4-11 As shown, in some examples, optionally, the first connection portion 211 is plugged into the second connection portion 212.

[0100] Plug connection can be understood as a kind of the above-mentioned detachable connection. Plug connection means that one of the first connection portion 211 and the second connection portion 212 is inserted into the other.

[0101] When placing the battery device 21, devices such as a crane can be used to directly lift the upper battery device 21 above the lower battery device 21, and the plug connection with the lower battery device 21 is directly realized by the fall of the upper battery device 21.

[0102] This plug connection method has the advantages of simple structure, easy processing, convenient disassembly and assembly, etc., and can further improve the stacking efficiency of the battery device 21 compared with other connection methods.

[0103] In some examples, optionally, the first connection portion 211 includes a jack 2111, and the second connection portion 212 includes a plug 2121 that is plugged into the jack 2111.

[0104] The aperture of the jack 2111 can be equal to or larger than the size of the plug 2121. When the aperture of the jack 2111 is equal to the size of the plug 2121, after the two are plugged together, the plug 2121 and the jack 2111 are in tight fit, thereby improving the stability after the connection between the first connecting portion 211 and the second connecting portion 212.

[0105] Of course, it can also be that the first connecting portion 211 includes the plug 2121 and the second connecting portion 212 includes the jack 2111 (this embodiment is not shown in the figure).

[0106] The shapes of the plug 2121 and the jack 2111 are not limited, but they need to match each other. For example, the jack 2111 can be a round hole with a circular cross-sectional shape, and at this time the plug 2121 is cylindrical, or the jack 2111 can be a rectangular hole with a rectangular cross-sectional shape, and at this time the plug 2121 is rectangular columnar. This embodiment will not list them one by one.

[0107] In this embodiment, the first connecting portion 211 is designed to include the jack 2111, and the second connecting portion 212 is designed to include the plug 2121. The structures of the jack 2111 and the plug 2121 are simple, easy to process, and convenient for disassembly and assembly.

[0108] Combined with the attached Figure 12 As shown, in some examples, optionally, a first insulating pad 22 is installed between the plug 2121 and the jack 2111.

[0109] The jack 2111 has a bottom wall surface and a side wall surface surrounding the bottom wall surface. The side wall surface of the plug 2121 is in limit fit with the side wall surface of the jack 2111, and the bottom wall surface of the jack 2111 abuts against the top wall surface of the plug 2121.

[0110] The first insulating pad 22 of this embodiment can be provided between the bottom wall surface of the jack 2111 and the top wall surface of the plug 2121, or can also be provided between the side wall surface of the jack 2111 and the side wall surface of the plug 2121. Either one or both of the two embodiments can be implemented.

[0111] The first insulating pad 22 is made of any insulating material, such as rubber, plastic, etc. This embodiment will not list them one by one.

[0112] In this embodiment, a first insulating pad 22 is provided between the plug 2121 and the jack 2111. By using the insulating effect of the first insulating pad 22, the possibility of short circuit between two adjacent battery devices 21 through the plug 2121 and the jack 2111 is reduced.

[0113] In some examples, optionally, the first insulating pad 22 includes a first elastic material layer 221.

[0114] The first insulating pad 22 includes a first elastic material layer 221, and there can be various embodiments. One is that the first insulating pad 22 only has the first elastic material layer 221. In this case, the first insulating pad 22 is made of an elastic insulating material.

[0115] Another is that in addition to the first elastic material layer 221, the first insulating pad 22 can also include other structures. For example, it can include other layers (not shown in the figure).

[0116] The first elastic material layer 221 needs to satisfy the functions of elasticity and insulation. For example, it can be made of materials such as rubber and silica gel.

[0117] By utilizing the elasticity of the first elastic material layer 221, the upper battery device 21 can be elastically supported. When the jack 2111 is docked with the plug 2121, buffering is performed through the first insulating pad 22, thereby reducing the possibility of excessive wear between the two. At the same time, the first insulating pad 22 can also reduce the disturbance to the internal battery cells 24 of the upper battery device 21 during installation and transportation.

[0118] Combined with the attached Figure 1-3 As shown again, in some examples, optionally, the accommodating device 10 further includes a positioning member 12 installed on the first wall 111. The positioning member 12 is connected to the battery pack 20 and limits the displacement of the battery pack 20 along the second direction Y and the third direction Z. The first direction X, the second direction Y, and the third direction Z intersect pairwise.

[0119] The reason for configuring the positioning member 12 is that after multiple battery packs 20 are placed in the second box body 11, if the adjacent two battery packs 20 are not closely attached, displacements in the second direction Y and the third direction Z are likely to occur.

[0120] Therefore, in this embodiment, the positioning member 12 is configured to position or limit the battery pack 20 in the second direction Y and the third direction Z, reducing the possibility that the battery pack 20 generates displacements along the second direction Y and the third direction Z during the movement or transportation of the energy storage device 100, and thereby improving the stability of the battery pack 20 placed in the accommodating device 10.

[0121] The second direction Y and the third direction Z can be two mutually perpendicular horizontal directions during the specific application of the energy storage device 100. The second direction Y and the third direction Z are respectively perpendicular to the first direction X. In some embodiments, the second direction Y can be the length direction of the first wall 111, and the third direction Z can be the width direction of the first wall 111.

[0122] There are also various structural forms of the positioning member 12. For example, the positioning member 12 can be a plate-shaped member that fits against the side walls of the battery pack 20 along the second direction Y and the third direction Z. The plate-shaped member can be a U-shaped plate or an L-shaped plate (this implementation is not shown in the figure). For another example, the positioning member can also be the following rod-shaped member, as long as it can meet the requirements of limiting the overall battery pack 20 in the second direction Y and the third direction Z.

[0123] In some examples, optionally, the length direction of the positioning member 12 is set along the first direction X, and it penetrates at least the battery device 21 adjacent to the first wall 111.

[0124] The positioning member 12 can be a rod-shaped member, and its cross-sectional shape can be circular, rectangular, etc. The battery device 21 adjacent to the first wall 111 is the lowermost battery device 21 of each battery pack 20. Since there is a connection relationship between the upper battery device 21 and the lower battery device 21, it is only necessary to limit the lowermost battery device 21.

[0125] When the positioning member 12 penetrates the battery device 21, a positioning hole 2311 matching the positioning member 12 can be opened on the battery device 21. Along the second direction Y and the third direction Z, the size of the positioning member 12 in this embodiment is less than or equal to the positioning hole 2311. For example, the size of the positioning hole 2311 is 0.1 mm to 2 mm larger than the size of the positioning member 12, so as to facilitate the positioning member 12 to be inserted into the positioning hole 2311.

[0126] Designing the positioning member 12 to penetrate the battery device 21 adjacent to the first wall 111 is convenient for installation, and can also limit the battery device 21 and the other battery devices 21 thereon.

[0127] In some examples, optionally, the positioning member 12 penetrates the first connection portion 211 and the second connection portion 212 of the battery device 21 adjacent to the first wall 111.

[0128] When the positioning member 12 penetrates the first connection portion 211 and the second connection portion 212 of the lowermost battery device 21, and when the first connection portion 211 includes a jack 2111 and the second connection portion 212 includes a plug 2121, a positioning hole 2311 penetrating the first connection portion 211 and the second connection portion 212 can be opened on the first wall 111. The positioning member 12 passes through the positioning hole 2311 of the part inside the second connection portion 212 and is also located in the jack 2111. Therefore, it can be said that the positioning member 12 penetrates the first connection portion 211 and the second connection portion 212.

[0129] And in combination with the appendix Figure 12As shown, it is necessary to also provide positioning holes 2311 on the bottom wall of the jack 2111 for the guide members to pass through. The outermost edge of the bottom wall of the jack 2111 is used to abut against the plug 2121. The positioning holes 2311 of the jack 2111 and the positioning holes 2311 of the plug 2121 are connected and the radial dimensions can be the same or similar.

[0130] In this embodiment, the positioning member 12 is designed to pass through the first connecting portion 211 and the second connecting portion 212 of the battery device 21 adjacent to the first wall 111, so that the first connecting portion 211 and the second connecting portion 212 are not only used for the connection between the upper and lower battery devices 21, but also can be in limiting cooperation with the positioning member 12, serving multiple purposes integrally with a clever structure.

[0131] Moreover, since the jack 2111 itself has a channel structure, compared with providing positioning holes 2311 at other positions of the battery device 21, the method of providing positioning holes 2311 in the first connecting portion 211 and the second connecting portion 212 is more convenient for processing.

[0132] In some examples, optionally, each battery device 21 is provided with a first connecting portion 211 and a second connecting portion 212, and the positioning member 12 passes through the first connecting portion 211 and the second connecting portion 212 of each battery device 21 in the battery pack 20.

[0133] The positioning member 12 passes through each battery device 21 in the battery pack 20. Therefore, it is necessary to provide positioning holes 2311 on the first connecting portion 211 and the second connecting portion 212 of each battery device 21 for the positioning member 12 to pass through.

[0134] Compared with the method of only using the positioning member 12 to pass through the lowermost battery device 21 for positioning, designing the positioning member 12 to pass through the first connecting portion 211 and the second connecting portion 212 of all the battery devices 21 in the battery pack 20 can improve the limiting effect on the whole battery pack 20 and further improve the stability of the position of the battery pack 20 in the accommodating device 10.

[0135] Combined with Figs. Figure 1-3 As shown in Figs. 8 and 9, in some examples, optionally, one side of each battery device 21 along the first direction X is provided with a first connecting portion 211, and the other side is provided with a second connecting portion 212.

[0136] That is, both the lowermost battery device 21 and the uppermost battery device 21 can be provided with a first connecting portion 211 and a second connecting portion 212 at the same time. The first connecting portion 211 can be located on the lower side of each battery device 21, and the second connecting portion 212 can be located on the upper side of each battery device 21.

[0137] Each battery device 21 is configured with a first connection portion 211 and a second connection portion 212, such that when the battery device 21 is installed inside the accommodating device 10, any one of the battery devices 21 can be the bottommost battery device 21, facilitating the assembly of the battery device 21.

[0138] Combined with the attached Figure 4-8 As shown in FIGS. 5 and 13, in some examples, optionally, the battery device 21 includes a first box body 23 and at least one battery cell 24 located inside the first box body 23. The first box body 23 is provided with a first connection portion 211 and a second connection portion 212.

[0139] The first box body 23 encloses an accommodation cavity for accommodating the battery cells 24, and one or more battery cells 24 are installed in the accommodation cavity.

[0140] The first connection portion 211 and the second connection portion 212 are provided on the first box body 23, which can facilitate the processing and forming of the first connection portion 211 and the second connection portion 212.

[0141] In some examples, optionally, the first box body 23 includes a second wall 232 and a third wall 233 opposite to each other in the first direction X, and a first side wall 231 connected between the second wall 232 and the third wall 233. The second wall 232 is disposed close to the first wall 111, the third wall 233 is disposed away from the first wall 111, a first connection portion 211 is provided on one side of the first side wall 231 along the first direction X, and a second connection portion 212 is provided on the other side.

[0142] The second wall 232 may be the bottom wall of the first box body 23, and the third wall 233 may be the top wall or the top cover of the first box body 23.

[0143] Combined with the attached Figure 4 and 14 As shown in FIGS., in some embodiments, optionally, a step 2314 is provided on the inner wall surface of the first side wall 231, and the step 2314 is used for installing the third wall 233.

[0144] The first connection portion 211 and the second connection portion 212 may be provided at the diagonal corners of the first side wall 231, or may be provided at other positions of the first side wall 231.

[0145] When the first connecting portion 211 includes a socket 2111 provided on the lower side of the first side wall 231 and the second connecting portion 212 includes a plug 2121 provided on the upper side of the first side wall 231, the lower end of the first connecting portion 211 of this embodiment may protrude from the lower end of the entire first side wall 231, or the first connecting portion 211 may be flush with the lower end of the first side wall 231. The upper end of the second connecting portion 212 needs to protrude from the upper end of the first side wall 231 so that the first side wall 231 does not affect the insertion of the first connecting portion 211 and the second connecting portion 212.

[0146] The first connecting portion 211 and the second connecting portion 212 may be integrally formed with the first box body 23 during processing, or may be formed by processing the first box body 23 after the first box body 23 is formed.

[0147] In this embodiment, the first connecting portion 211 and the second connecting portion 212 are provided on the first side wall 231 of the box body, which does not occupy the internal space of the box body, and when the first connecting portion 211 and the second connecting portion 212 are docked, it will not cause disturbance to the internal battery cells 24.

[0148] In some examples, optionally, the first side wall 231 is provided with a corner, the first connecting portion 211 is provided on one side of the corner along the first direction X, and the second connecting portion 212 is provided on the other side of the corner along the first direction X.

[0149] Taking the first side wall 231 in the figure as a rectangle as an example, its corner refers to the diagonal of the rectangle, that is, the angled connection of two sides.

[0150] The first connecting portion 211 and the second connecting portion 212 are provided at the corner of the first side wall 231. The structural stability and strength at the corner are greater than other positions of the first side wall 231, so the stability of the connection between two adjacent battery devices 21 can be improved.

[0151] In some examples, optionally, the first side wall 231 is provided with a support surface facing away from the first wall 111. The support surface is provided with the second connecting portion 212 and is used to carry the adjacent battery device 21.

[0152] The support surface 2313 may be the upper surface of the first side wall 231. The second connecting portion 212 is provided at the corner of the support surface 2313. In some embodiments, the support surface 2313 may directly abut against the first side wall 231 of the upper battery device 21, or may abut against the third wall 233 of the upper battery device 21, both of which can achieve the support of the adjacent upper battery device 21.

[0153] After the second connection part 212 is docked with the first connection part 211 of the upper battery device 21, the first side wall 231 is used to support the adjacent upper battery device 21, and the first side wall 231 can provide a good supporting effect.

[0154] Combined with the attached Figure 4 and the attached Figure 12 As shown, in some examples, optionally, the minimum dimensions of the support surface 2313 around the second connection part 212 in the second direction Y and the third direction Z are greater than or equal to 2 mm, and the first direction X, the second direction Y, and the third direction Z intersect pairwise.

[0155] Combined with the attached Figure 12 As shown, in the cross-section with the second connection part 212, the second connection part 212 and the support surface 2313 form a structure similar to a step. The support surfaces 2313 on both sides of the second connection part 212 need to meet certain dimensional requirements to provide better support for the upper battery device 21.

[0156] Therefore, in this embodiment, the dimensions of the support surface 2313 around the second connection part 212 in the second direction Y and the third direction Z are designed to be greater than or equal to 2 mm. Taking the two parts of the support surface 2313 on the left and right sides of the second connection part 212 in the figure as an example, the dimension of each part of the support surface 2313 in the second direction Y is greater than or equal to 2 mm. Thus, the support surface 2313 around the second connection part 212 has a larger contact area with the upper battery device 21, provides a more stable supporting force, and reduces the possibility of damage to the support surface 2313 around the second connection part 212 under pressure.

[0157] Combined with the attached Figure 8 and 14 As shown, in some examples, a second insulating pad 25 is provided between the support surface 2313 and the adjacent battery device 21.

[0158] The second insulating pad 25 may be made of the same material as the aforementioned first insulating pad 22. The second insulating pad 25 can be directly installed on the support surface 2313 of the first side wall 231 of the lower battery device 21 and is used to bear the bottom surface of the first side wall 231 of the upper battery device 21.

[0159] In this embodiment, by using the insulating pads to isolate adjacent battery devices 21, the risk of short circuit between adjacent battery devices 21 is further reduced.

[0160] In some examples, optionally, the second insulating pad 25 includes a second elastic material layer 251.

[0161] The second insulating pad 25 includes a second elastic material layer 251. One case is that the second insulating pad 25 only has the second elastic material layer 251, and in this case, the second insulating pad 25 is made of an elastic insulating material. Another case is that the second insulating pad 25 may further include other structures in addition to the second elastic material layer 251, for example, it may include other layers.

[0162] The material of the second elastic material layer 251 is the same as or similar to that of the aforementioned first elastic material layer 221. For example, it can be materials such as rubber and silica gel.

[0163] The elasticity of the second elastic material layer 251 can be used to elastically support the upper battery device 21, reducing the disturbance to its internal structure during the installation and transportation of the upper battery device 21.

[0164] Combined with the attached Figure 13 and 14 As shown, in some examples, optionally, the first side wall 231 is provided with a reinforcing rib 2312.

[0165] The structural form of the reinforcing rib 2312 is not limited. For example, its cross-section in the figure is approximately grid-shaped, and of course, it can also be other shapes, such as triangular, rectangular, etc. This embodiment will not list them one by one.

[0166] The reinforcing rib 2312 can be integrally formed with the first side wall 231, or can be connected to the first side wall 231 through processes such as welding.

[0167] Providing the reinforcing rib 2312 on the first side wall 231 can improve the structural strength of the first side wall 231, thereby better supporting and protecting the battery cells 24 inside the battery box.

[0168] Finally, please refer to the attached Figure 1-14As shown in the figure, an embodiment of the present application provides an energy storage device 100, which includes a housing device 10 and a battery pack 20. The housing device 10 includes a first wall 111, and the battery pack 20 is placed on the first wall 111. The battery pack 20 includes a plurality of battery devices 21 stacked in sequence along a first direction X. The first direction X is the arrangement direction of the battery pack 20 to the first wall 111. One of the adjacent two battery devices 21 is provided with a first connection portion 211, and the other is provided with a second connection portion 212 that is positioned and connected to the first connection portion 211. The adjacent two battery devices 21 are kept relatively fixed by the positioning connection of the first connection portion 211 and the second connection portion 212. The first connection portion 211 is inserted into the second connection portion 212. The first connection portion 211 includes a jack 2111, and the second connection portion 212 includes a plug 2121 that is inserted into the jack 2111. A first insulating pad 22 is installed between the plug 2121 and the jack 2111. The first insulating pad 22 includes a first elastic material layer 221. The housing device 10 further includes a positioning member 12 installed on the first wall 111. The positioning member 12 is connected to the battery pack 20 and limits the displacement of the battery pack 20 along a second direction Y and a third direction Z. The first direction X, the second direction Y, and the third direction Z intersect pairwise. The length direction of the positioning member 12 is arranged along the first direction X and at least penetrates the battery device 21 adjacent to the first wall 111. Each battery device 21 is provided with a first connection portion 211 and a connection portion. The positioning member 12 penetrates the first connection portion 211 and the second connection portion 212 of the battery device 21 adjacent to the first wall 111. The positioning member 12 penetrates the first connection portion 211 and the second connection portion 212 of each battery device 21 of the battery pack 20. A first connection portion 211 is provided on one side of each battery device 21 along the first direction X, and a second connection portion 212 is provided on the other side. The battery device 21 includes a first box body 23 and at least one battery cell 24 located in the first box body 23. The first box body 23 is provided with a first connection portion 211 and a second connection portion 212. The first box body 23 includes a second wall 232 and a third wall 233 opposite to each other along the first direction X, and a first side wall 231 connected between the second wall 232 and the third wall 233. The second wall 232 is arranged close to the first wall 111, the third wall 233 is arranged away from the first wall 111, a first connection portion 211 is provided on one side of the first side wall 231 along the first direction X, and a second connection portion 212 is provided on the other side. The first side wall 231 is provided with a corner. The first connection portion 211 is provided on one side of the corner along the first direction X, and the second connection portion 212 is provided on the other side of the corner along the first direction X. The first side wall 231 is provided with a support surface 2313 facing away from the first wall 111. The support surface 2313 is provided with the second connection portion 212 and is used to carry the adjacent battery device 21. The minimum dimensions of the support surface 2313 around the second connection portion 212 along the second direction Y and the third direction Z are greater than or equal to 2 mm. The first direction X, the second direction Y, and the third direction Z intersect pairwise.A second insulating pad 25 is provided between the support surface 2313 and the adjacent battery device 21. The second insulating pad 25 includes a second elastic material layer 251. The first side wall 231 is provided with a reinforcing rib 2312.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy storage device, characterized in that, Comprising: A containing device, including a first wall; At least one battery pack, placed on the first wall, the battery pack includes a plurality of battery devices stacked in sequence along a first direction, the first direction being the arrangement direction from the battery pack to the first wall, one of the adjacent two battery devices in the battery pack is provided with a first connection portion, and the other is provided with a second connection portion that is positioned and connected to the first connection portion, and the adjacent two battery devices are kept relatively fixed through the positioning connection of the first connection portion and the second connection portion; and A positioning member, connected to the battery pack and limiting the displacement of the battery pack along a second direction and a third direction, the first direction, the second direction, and the third direction intersecting pairwise.

2. The energy storage device according to claim 1, wherein The first connection portion is inserted into the second connection portion.

3. The energy storage device according to claim 2, characterized in that The first connection portion includes a jack, and the second connection portion includes a plug that is inserted into the jack.

4. The energy storage device according to claim 3, wherein, A first insulating pad is installed between the plug and the jack.

5. The energy storage device according to claim 4, wherein The first insulating pad includes a first elastic material layer.

6. The energy storage device according to claim 1, wherein The length direction of the positioning member is arranged along the first direction and at least penetrates through the battery device adjacent to the first wall.

7. The energy storage device according to claim 6, wherein, Each of the battery devices is provided with the first connection portion and the connection portion, and the positioning member penetrates through the first connection portion and the second connection portion of the battery device adjacent to the first wall.

8. The energy storage device according to claim 7, wherein The positioning member penetrates through the first connection portion and the second connection portion of each battery device in the battery pack.

9. The energy storage device according to any one of claims 1-8, characterized in that, One side of each battery device along the first direction is provided with the first connection portion, and the other side of each battery device along the first direction is provided with the second connection portion.

10. The energy storage device according to claim 9, wherein The battery device includes a first box body and at least one battery cell located in the first box body, and the first box body is provided with the first connection portion and the second connection portion.

11. The energy storage device according to claim 10, characterized in that, The first box body includes a second wall and a third wall opposite to each other along the first direction, and a first side wall connected between the second wall and the third wall, the second wall is arranged close to the first wall, the third wall is arranged away from the first wall, one side of the first side wall along the first direction is provided with the first connection portion, and the other side of the first side wall is provided with the second connection portion.

12. The energy storage device according to claim 11, wherein, The first side wall is provided with a corner, the first connection portion is arranged on one side of the corner along the first direction, and the second connection portion is arranged on the other side of the corner along the first direction.

13. The energy storage device according to claim 12, characterized in that, The first side wall is provided with a supporting surface facing away from the first wall, the supporting surface is provided with the second connection portion and is used for carrying the adjacent battery device.

14. The energy storage device according to claim 13, characterized in that, The minimum dimension of the supporting surface around the second connection portion along the second direction and the third direction is greater than or equal to 2 mm, and the first direction, the second direction, and the third direction intersect pairwise.

15. The energy storage device according to claim 13, characterized in that, A second insulating pad is provided between the supporting surface and the adjacent battery device.

16. The energy storage device according to claim 15, characterized in that, The second insulating pad includes a second elastic material layer.

17. The energy storage device according to claim 11, wherein, The first side wall is provided with reinforcing ribs.

Images