Connecting device, battery module and energy storage equipment

Abstract

The utility model discloses a connecting device, a battery module and energy storage equipment, the connecting device is provided with a first side and a second side which are oppositely arranged, the first side is connected with the side wall of a first battery pack, the second side is connected with the side wall of a second battery pack, the connecting device is provided with a connecting part positioned on the first side and a positioning part positioned on the second side, and the connecting part is connected with the second side. And the connecting part is used for preassembling the connecting device on the first battery pack. When the first battery pack and the second battery pack are stacked, the positioning part is used for guiding and positioning the second battery pack. According to the connecting device, two battery modules can be conveniently positioned and stacked, the steps and time of field installation can be reduced, and the installation efficiency of the energy storage equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and in particular to a connecting device, a battery module and an energy storage device. Background Art

[0002] Existing energy storage devices usually include multiple stacked battery modules. In order to ensure the stability of the energy storage device, two battery modules need to be positioned during the stacking process. Existing positioning devices are set at the top and bottom of the battery module. During the actual installation process, the operator's line of sight is blocked by the battery module itself, which makes battery stacking inconvenient. Utility Model Content

[0003] The first objective of the utility model is to provide a connection device, which can facilitate the positioning and stacking of two battery modules, reduce the steps and time of on-site installation, and improve the installation efficiency of the energy storage device.

[0004] The second object of the utility model is to provide a battery module, in which during the stacking process of the battery modules, the positioning and connection areas are all within the operator's line of sight, which facilitates the positioning and stacking of two battery modules, thereby helping to improve the installation efficiency of the energy storage device.

[0005] The third purpose of the utility model is to provide an energy storage device, which is convenient to assemble and has high installation efficiency.

[0006] In order to achieve the above technical effects, the technical solution of the utility model is as follows:

[0007] The utility model discloses a connecting device, wherein the connecting device has a first side and a second side arranged opposite to each other, the first side is used to be connected to the side wall of a first battery pack, and the second side is used to be connected to the side wall of a second battery pack, and the connecting device is provided with a connecting portion located on the first side and a positioning portion located on the second side, and the connecting portion is used to pre-install the connecting device on the first battery pack; wherein: when the first battery pack and the second battery pack are stacked, the positioning portion is used to guide and position the second battery pack.

[0008] In some embodiments, the connecting portion includes a connecting hole, and a connecting member passes through the connecting hole to fix the first side of the connecting device to the first battery pack; or: the connecting portion includes a connecting column, and the connecting column is connected to the first battery pack by a thread.

[0009] In some embodiments, the positioning portion includes a positioning groove, the opening of which faces away from the first side, and a positioning piece is provided on the first battery pack. When the first battery pack and the second battery pack are stacked, the positioning piece can be inserted into the positioning groove through the opening.

[0010] In some embodiments, the connecting device is also provided with a first fixing hole and / or a second fixing hole, there are at least two first fixing holes, and at least two of the first fixing holes are located on both sides of the connecting portion, and a first fixing member passes through the first fixing hole to fix the first side to the first battery pack; there are at least two second fixing holes, and at least two of the second fixing holes are located on both sides of the connecting portion, and a second fixing member passes through the second fixing hole to fix the second side to the second battery pack.

[0011] In some embodiments, the connecting device is further provided with a snap-on structure, and the snap-on structure is used for detachably connecting with the handle.

[0012] In some embodiments, the connecting device is further provided with a wire binding structure, and the wire binding structure is used for binding the wires.

[0013] The utility model also discloses a battery module, including a battery pack and the connecting device mentioned above, wherein there are two connecting devices, and the two connecting devices are connected to two side walls of the battery pack spaced apart along its length direction, and the battery pack is provided with a positioning piece that cooperates with the positioning part of the connecting device.

[0014] In some embodiments, the positioning portion includes a positioning groove, and the positioning member includes a positioning column formed on the side wall of the battery pack. Among two adjacent battery modules, the positioning column of one battery module can cooperate with the positioning groove of the other battery module.

[0015] In some embodiments, the positioning portion includes a positioning groove, and the positioning member includes a positioning bolt installed on the side wall of the battery pack. Among two adjacent battery modules, the positioning bolt of one battery module can cooperate with the positioning groove of the other battery module.

[0016] The utility model also discloses an energy storage device, comprising a plurality of the battery modules mentioned above, wherein the plurality of battery modules are stacked in sequence along a vertical direction.

[0017] The beneficial effects of the connecting device of the present invention are as follows: in the actual assembly process, the first side of the connecting device is pre-installed on the side wall of the first battery pack through the connecting portion as the bottom battery pack, and then the second battery pack is stacked on the first battery pack. In the stacking process, since the connecting device is provided with a positioning portion, the positioning portion can guide and position the second battery pack during the stacking process to complete the accurate stacking of the first battery pack and the second battery pack. Compared with the prior art in which the positioning device is set on the top wall and side wall of the battery pack, the connecting device of this embodiment is pre-connected to the first battery pack, and in the process of stacking the second battery pack, it guides and positions the second battery pack, facilitates the positioning and stacking of the two battery modules, can reduce the steps and time of on-site installation, and improves the installation efficiency of the energy storage equipment.

[0018] The beneficial effects of the battery module of the present invention are as follows: since the battery module includes two connecting devices, the installation positions defined by the two connecting devices are used to stack another battery module, thereby limiting the battery module along the length direction during the stacking process, and the positioning piece on one battery module cooperates with the positioning part on the connecting device of another battery module to limit the battery module along the width direction during the stacking process, thereby ensuring that the battery modules can be stacked stably, and since the connecting device is installed on the side wall of the battery pack, during the stacking process of multiple battery modules, the positioning and connecting areas are within the operator's line of sight, which facilitates the positioning and stacking of the two battery modules, thereby helping to improve the installation efficiency of the energy storage equipment.

[0019] The beneficial effect of the energy storage device of the present invention is as follows: since the energy storage device uses a plurality of the battery modules described above for stacking, the assembly of the energy storage device is relatively convenient and the installation efficiency is relatively high.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a connecting device according to an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of a battery module of an embodiment of the utility model;

[0023] Figure 3 yes Figure 2 The enlarged schematic diagram of the circled A;

[0024] Figure 4 It is a schematic diagram of the structure of two stacked battery modules of the utility model;

[0025] Figure 5 yes Figure 4 The enlarged schematic diagram of point B is circled.

[0026] Reference numerals:

[0027] 100, connecting device; 110, first side; 120, second side; 130, connecting hole; 140, positioning groove; 141, opening; 150, first fixing hole; 160, second fixing hole; 170, clamping structure; 180, wire binding structure;

[0028] 200, battery pack; 210, first battery pack; 220, second battery pack; 221, positioning bolt;

[0029] 300, connecting member; 400, first fixing member; 500, second fixing member. DETAILED DESCRIPTION

[0030] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features, and are used to distinguish and describe features, without distinction of order or importance. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The specific structures of the connection device 100, the battery module and the energy storage device according to the embodiment of the utility model are described below with reference to the accompanying drawings.

[0035] First of all, it should be explained that the connecting device 100 of the embodiment of the utility model is used in the process of stacking multiple battery packs 200. For the convenience of description, when the battery packs 200 are stacked, the battery pack 200 located at the bottom is called the first battery pack 210, and the battery pack located at the top is called the second battery pack 220.

[0036] like Figure 1 As shown, the connection device 100 of this embodiment has a first side 110 and a second side 120 arranged opposite to each other. The first side 110 is used to connect to the side wall of the first battery pack 210, and the second side 120 is used to connect to the side wall of the second battery pack 220. The connection device 100 is provided with a connection portion located on the first side 110 and a positioning portion located on the second side 120. The connection portion is used to pre-install the connection device 100 on the first battery pack 210. Figure 4 and Figure 5 As shown, in the case of stacking the first battery pack 210 and the second battery pack 220, the positioning part is used to guide and position the second battery pack 220. It can be understood that in the actual assembly process, the first side 110 of the connecting device 100 is pre-installed on the side wall of the first battery pack 210 through the connecting part as the bottom battery pack, and then the second battery pack 220 is stacked on the first battery pack 210. In the stacking process, since the connecting device 100 is provided with a positioning part, the positioning part can guide and position the second battery pack 220 in the process of stacking, so as to complete the accurate stacking of the first battery pack 210 and the second battery pack 220. Compared with the prior art in which the positioning device is set on the top wall and side wall of the battery pack, the connecting device 100 of this embodiment is pre-connected to the first battery pack 210. In the process of stacking the second battery pack 220, the second battery pack 220 is guided and positioned, which facilitates the positioning and stacking of the two battery modules, can reduce the steps and time of on-site installation, and improve the installation efficiency of the energy storage device.

[0037] refer to Figure 1 and Figure 5As shown, the connecting portion includes a connecting hole 130. The connecting member 300 passes through the connecting hole 130 to fix the first side 110 of the connecting device 100 to the first battery pack 210. It can be understood that in the actual installation process, it is only necessary to fit the connecting device 100 to the side wall of the first battery pack 210 so that the connecting hole 130 corresponds to the hole structure on the side wall of the first battery pack 210, and then insert the connecting member 300 through the connecting hole 130 into the hole structure on the side wall of the first battery pack 210. The structure of connecting the connecting device 100 to the first battery pack 210 using the connecting member 300, on the one hand, facilitates the operator to fix the connecting device 100 to the side wall of the first battery pack 210, and on the other hand, helps to improve the connection stability between the connecting device 100 and the side wall of the first battery pack 210.

[0038] It is necessary to add that, if Figure 5 The connecting member 300 shown is a screw. In other embodiments of the present invention, the connecting member 300 may also be a fixing pin or other structures, and is not limited to Figure 3 The structure shown.

[0039] In a parallel embodiment, the connection portion includes a connection column, and the connection column is connected to the first battery pack 210 by a thread. Specifically, the connection portion includes a connection column, and the connection column is provided with an external thread. The side wall of the first battery pack 210 is provided with a threaded hole. In the actual installation process, the connection column is inserted into the threaded hole and then the entire connection device 100 is rotated to lock the connection device 100 to the side wall of the first battery pack 210. This connection method does not require the use of additional connection components, which is conducive to simplifying the connection portion.

[0040] Of course, it should be additionally explained here that in other embodiments of the present invention, the connection portion can also select other structures such as snaps, adhesive layers, etc. that can be connected to the side wall of the first battery pack 210 according to actual needs, and is not limited to the above description.

[0041] refer to Figure 1 and Figure 5 As shown, the positioning portion includes a positioning groove 140, and the opening 141 of the positioning groove 140 faces the direction away from the first side 110. The second battery pack 220 is provided with a positioning piece, and when two second battery packs 220 are stacked, the positioning piece can be inserted into the positioning groove 140 through the opening 141. It can be understood that in the actual stacking process, the positioning piece of the upper second battery pack 220 is aligned with the opening 141, and then the second battery pack 220 is lowered. When the positioning piece is inserted into the positioning groove 140, the positioning of the upper second battery pack 220 is achieved.

[0042] Preferably, the opening 141 is a bell mouth. Thus, the bell mouth with a gradually decreasing width can facilitate the insertion of the positioning member, thereby facilitating the stacking of the second battery pack 220.

[0043] refer to Figure 1 and Figure 5 As shown, the connection device 100 is further provided with a first fixing hole 150, and there are at least two first fixing holes 150, and at least two first fixing holes 150 are located on both sides of the connection portion, and the first fixing member 400 passes through the first fixing hole 150 to fix the first side 110 on a first battery pack 210. It can be understood that by fixing the connection device 100 and the first battery pack 210 through at least two first fixing members 400 passing through the first fixing holes 150, the connection stability between the connection device 100 and the first battery pack 210 can be improved, and the connection device 100 can be prevented from falling off from the first battery pack 210 during transportation or handling, resulting in an unreliable connection between multiple first battery packs 210. Figure 3 The first fixing member 400 shown includes a bolt, and a gasket is sleeved on the bolt. The bolt and the gasket are used to achieve connection, which can ensure the connection stability between the connecting device 100 and the first battery pack 210 and avoid scratches on the connecting device 100. In other embodiments of the utility model, the first fixing member 400 can also be other connecting components such as a positioning pin, and is not limited to Figure 3 The structure shown.

[0044] It should be supplemented that, in other embodiments of the present invention, the connection stability between the connecting device 100 and the first battery pack 210 may be enhanced by other methods such as bonding, welding or snap connection, which is not limited to the above description.

[0045] refer to Figure 1 and Figure 5 As shown, the connection device 100 is further provided with a second fixing hole 160, and there are at least two second fixing holes 160, and at least two second fixing holes 160 are located on both sides of the connection portion, and the second fixing member 500 passes through the second fixing hole 160 to fix the second side 120 on another second battery pack 220. It can be understood that the additional second fixing hole 160 uses at least two second fixing members 500 passing through the second fixing holes 160 to fix the connection device 100 and the second battery pack 220 located above, which can improve the connection stability between the second side 120 of the connection device 100 and the second battery pack 220, thereby improving the connection stability of the two second battery packs 220 stacked. Figure 5 The second fixing member 500 shown includes a bolt, and a gasket is sleeved on the bolt. The bolt and the gasket are used to achieve connection, which can ensure the connection stability between the connecting device 100 and the second battery pack 220, and can also avoid scratches on the connecting device 100. In other embodiments of the utility model, the second fixing member 500 can also be other connecting components such as a positioning pin, and is not limited to Figure 5 The structure shown.

[0046] It should be supplemented that, in other embodiments of the present invention, the connection stability between the second end of the connecting device 100 and the second battery pack 220 may be enhanced by other methods such as bonding, welding or snap connection, which is not limited to the above description.

[0047] Preferably, the first fixing hole 150 is a round hole, and the second fixing hole 160 is a waist-shaped hole. It can be understood that the first fixing hole 150 is a round hole to give the first side 110 of the connecting device 100 a determined installation position, ensuring the installation accuracy of the connecting device 100, and the second fixing hole 160 is a waist-shaped hole. After the second battery pack 220 is stacked, the position of the second fixing member 500 can be adjusted according to actual needs to ensure that the second fixing member 500 can be inserted into the hole structure of the second battery pack 220 above, that is, the second fixing hole 160 is set as a waist-shaped hole to give a certain installation margin, which is convenient for installation.

[0048] refer to Figure 1 As shown, the connecting device 100 is also provided with a clamping structure 170, and the clamping structure 170 is used to be detachably connected to the handle. First of all, it should be noted that in the prior art, a handle is generally provided on the battery pack for the convenience of transportation. However, when the battery pack is carried by the handle provided on the battery pack after stacking, an unbalanced force phenomenon is prone to occur, thereby causing the battery pack to shake. In this embodiment, a clamping structure 170 is provided on the connecting device 100. When the stacked battery pack 200 needs to be carried, the handle is first installed on the clamping structure 170 to achieve transportation, and then the handle can be removed after the transportation is completed. The clamping structure 170 added to the connecting device 100 not only facilitates the transportation of the battery pack 200, but also allows the handle to be removed after the transportation is completed, so that the handle can be recycled. Figure 1 The illustrated clamping structure 170 is two clamping holes spaced apart, and in the actual installation process, only the two ends of the handle need to be clamped into the clamping holes. In other embodiments of the present utility model, the clamping structure 170 can also be a clamping protrusion, which can be inserted into the handle.

[0049] refer to Figure 1 As shown, the connection device 100 is also provided with a wire binding structure 180, which is used to bind the wires. It is understandable that the wire binding structure 180 is provided on the connection device 100 to bind the lead wires of the battery pack 200, and there is no need to provide an additional wire binding structure, which is conducive to simplifying the structure of the battery pack 200 and facilitating installation.

[0050] The advantages of the connection device 100 of this embodiment are as follows:

[0051] First, the connecting device 100 is pre-fixed on the first battery pack 210, which reduces the steps and time of on-site installation and improves the equipment installation efficiency.

[0052] Second, the connecting member 300 , the first fixing member 400 and the second fixing member 500 fixed on the connecting device 100 are all connected to the side walls of the first battery pack 210 and the second battery pack 220 , and are always within the sight range during the installation process, which is convenient for installation.

[0053] Third: The connecting device 100 can not only position and guide the first battery pack 210 and the second battery pack 220, but also install and remove the handle, and can also serve as a wire binding structure 180 for binding wires. One part realizes multiple functions, reducing the number of parts required in the assembly process, reducing the installation steps, and greatly reducing costs.

[0054] The utility model also discloses a battery module, such as Figure 2-Figure 3 As shown, the battery module of this embodiment includes a battery pack 200 and the aforementioned connecting device 100, there are two connecting devices 100, the two connecting devices 100 are connected to the two side walls of the battery pack 200 spaced apart along the length direction thereof, and the battery pack 200 is provided with a positioning piece that cooperates with the positioning portion of the connecting device 100. It can be understood that, since the battery module includes two connecting devices 100, the installation position defined by the two connecting devices 100 is used to stack another battery module, so that the battery module is restricted along the length direction during the stacking process, and the positioning piece on one battery module cooperates with the positioning portion on the connecting device 100 of another battery module to restrict the battery module along the width direction during the stacking process, ensuring that the battery modules can be stably stacked, and since the connecting device 100 is installed on the side wall of the battery pack 200, during the stacking process of multiple battery modules, the positioning connection area is within the operator's line of sight, which facilitates the positioning and stacking of the two battery modules, thereby facilitating the installation efficiency of the energy storage device.

[0055] The positioning portion includes a positioning groove 140, and the positioning member includes a positioning bolt 221 installed on the side wall of the battery pack 200. In two adjacent battery modules, the positioning bolt 221 of one battery module can cooperate with the positioning groove 140 of the other battery module. It can be understood that during the assembly process, the positioning bolt 221 and the connecting device 100 are respectively installed on the battery pack 200 as a battery module shipped from the factory. At the installation site, only two battery modules need to be stacked, which simplifies the stacking operation of the battery modules and is conducive to improving the installation efficiency of the energy storage device at the installation site.

[0056] Optionally, the positioning bolt 221 includes a threaded section and an optical axis section, the threaded section is threadedly connected to the side wall of the battery pack 200, and the optical axis section cooperates with the positioning groove 140. It is understandable that the positioning bolt 221 is formed as a step bolt. During the installation process, when the positioning bolt 221 is installed, when the optical axis section stops against the side wall of the battery pack 200, the rotation of the positioning bolt 221 can be stopped, thereby realizing the reminder to the operator when the positioning bolt 221 is installed in place. The cooperation of the optical axis section and the positioning groove 140 can also make the positioning member more smoothly inserted into the positioning groove 140, which is conducive to stacking battery modules.

[0057] In some parallel embodiments, the positioning member includes a positioning column formed on the side wall of the battery pack 200. In two adjacent battery modules, the positioning column of one battery module can cooperate with the positioning groove 140 of the other battery module. It is understandable that the positioning column can be integrally formed on the battery pack 200. Compared with the structure of the positioning bolt 221, the positioning member is integrally formed on the housing of the battery pack 200, which is conducive to reducing the number of parts, thereby further facilitating assembly.

[0058] The utility model also discloses an energy storage device, comprising a plurality of the battery modules described above, wherein the plurality of battery modules are stacked in sequence along a vertical direction. Since the energy storage device uses a plurality of the battery modules described above to be stacked, the assembly of the energy storage device is relatively convenient and the installation efficiency is relatively high.

[0059] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A connection device, It is characterized in that The connecting device has a first side and a second side that are arranged opposite to each other, the first side is used to connect to the side wall of the first battery pack, and the second side is used to connect to the side wall of the second battery pack. The connecting device is provided with a connecting portion located on the first side and a positioning portion located on the second side, and the connecting portion is used to pre-install the connecting device on the first battery pack; wherein: When the first battery pack and the second battery pack are stacked, the positioning portion is used to guide and position the second battery pack.

2. The connection device according to claim 1, It is characterized in that The connecting portion includes a connecting hole, and a connecting member passes through the connecting hole to fix the first side of the connecting device to the first battery pack; Alternatively: the connecting portion includes a connecting column, and the connecting column is connected to the first battery pack via a thread.

3. The connection device according to claim 1, It is characterized in that The positioning portion includes a positioning groove, the opening of which faces away from the first side, and a positioning piece is provided on the second battery pack. When the first battery pack and the second battery pack are stacked, the positioning piece can be inserted into the positioning groove through the opening.

4. The connection device according to claim 1, It is characterized in that The connecting device is further provided with a first fixing hole and / or a second fixing hole, there are at least two first fixing holes, and at least two first fixing holes are located on both sides of the connecting portion, and a first fixing member passes through the first fixing hole to fix the first side on the first battery pack; There are at least two second fixing holes, and at least two of the second fixing holes are located on both sides of the connecting portion. The second fixing member passes through the second fixing holes to fix the second side on the second battery pack.

5. The connection device according to claim 1, It is characterized in that The connecting device is also provided with a clamping structure, and the clamping structure is used for detachably connecting with the handle.

6. The connection device according to claim 1, It is characterized in that The connecting device is also provided with a wire binding structure, and the wire binding structure is used for binding the wires.

7. A battery module, It is characterized in that It comprises a battery pack and a connecting device as described in any one of claims 1 to 6, wherein there are two connecting devices, the two connecting devices are connected to two side walls of the battery pack spaced apart along the length direction thereof, and the battery pack is provided with a positioning piece that cooperates with the positioning portion of the connecting device.

8. The battery module according to claim 7, It is characterized in that The positioning portion includes a positioning groove, and the positioning member includes a positioning column formed on a side wall of the battery pack. Among two adjacent battery modules, the positioning column of one battery module can cooperate with the positioning groove of the other battery module.

9. The battery module according to claim 7, It is characterized in that The positioning portion includes a positioning groove, and the positioning member includes a positioning bolt installed on the side wall of the battery pack. Among two adjacent battery modules, the positioning bolt of one battery module can cooperate with the positioning groove of the other battery module.

10. An energy storage device, It is characterized in that It comprises a plurality of battery modules as claimed in any one of claims 7 to 9, wherein the plurality of battery modules are stacked in sequence along a vertical direction.

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