Energy storage unit and energy storage battery

Abstract

The present invention provides an energy storage unit and an energy storage battery, the energy storage unit includes a connection structure and at least two battery modules, the at least two battery modules are stacked, and at least one pair of opposite side end surfaces of each of the two adjacent battery modules are provided with a connection structure, the connection structure is used to fasten and connect the two adjacent battery modules. The energy storage unit and the energy storage battery provided by the present invention can improve the convenience of installation and removal of the energy storage unit, and thus make the installation and removal of the energy storage unit more efficient.

Description

[Technical Field]

[0001] The present invention relates to the field of battery technology, and more particularly to energy storage units and energy storage batteries. [Background technology]

[0002] With the development and application of photovoltaic power generation systems, home photovoltaic energy storage systems have been widely adopted due to their advantages, such as grid-connected and stand-alone operation, the ability to transfer surplus power back to the grid when grid-connected, and self-consumption during nighttime and cloudy or rainy days. In home photovoltaic energy storage systems, the battery system consists of a battery module and a control module. Commonly used battery systems are mainly divided into integrated cabinet types and independent module stack types. Independent module stack battery boxes have the advantages of small volume, light weight, convenient transportation and installation maintenance, small footprint, no need for cranes or forklifts, one-person installation of the battery box, and easy subsequent expansion and upgrade. Therefore, in the prior art, multiple modular assembly batteries have been developed.

[0003] For example, the power supply cabinet disclosed in publication number CN206099077U solves the problem of battery modular assembly, but the following problems exist in actual use:

[0004] 1. The locking device needs to be pre-installed in the box body, which increases the cost of the locking device and requires high installation accuracy for multiple products, making mass production and maintenance inconvenient.

[0005] 2. After the entire battery system is stacked and installed, if the lower battery box component requires maintenance on its own, the upper battery box component must be removed and the cover must be opened to perform maintenance.

[0006] 3. The handle of the box body is exposed to the outside, and the welded seam of the handle will be exposed to the outside for a long period of time, which not only poses a risk of rust but also affects the overall aesthetics of the product.

[0007] In addition, for example, Publication No. CN209447901U discloses a stacked battery pack, which can also solve the problem of battery modular assembly, but there are the following problems in actual use.

[0008] 1. The external fixing device has an integrated structure. When arranging different battery capacities, different connecting plates or connecting rods must be provided. In addition, the laminated structure has accumulated errors, so the processing and assembly of parts requires certain tolerances, which makes on-site installation and maintenance and subsequent system expansion inconvenient.

[0009] 2. After the entire battery system is stacked and installed, if the lower battery box component requires maintenance on its own, the upper battery box component must be removed and the cover must be opened to perform maintenance.

[0010] 3. The handle of the box body may leak, and the welded joint of the handle may leak over time, which may cause rust and affect the overall aesthetics of the product.

[0011] Therefore, the two technical solutions already existing in the prior art have the problem of being inconvenient to use in practice. Summary of the Invention [Problem to be solved by the invention]

[0012] The present invention aims to solve at least one of the technical problems existing in the prior art, and provides an energy storage unit and an energy storage battery that can improve the convenience of attaching and detaching the energy storage unit, thereby making the attachment and detachment of the energy storage unit more efficient.

[0013] A first object of the present invention is to provide an energy storage unit that solves the technical problem of increasing convenience and efficiency in the assembly and disassembly process of the energy storage unit.

[0014] A second object of the present invention is to provide an energy storage battery that solves the technical problem of increasing convenience and efficiency in the assembly and disassembly process of the energy storage battery. [Means for solving the problem]

[0015] The energy storage unit of the present invention is realized as follows.

[0016] The energy storage unit includes a connection structure and at least two battery modules, the at least two battery modules being stacked, and the connection structure is provided on at least one pair of opposing side end surfaces of each of two adjacent battery modules, and the connection structure is used to fasten and connect the two adjacent battery modules.

[0017] In any embodiment of the present invention, the connection structure includes a connection plate and a fastener, and the fastener is used to fasten and connect the connection plate and the battery module.

[0018] In any embodiment of the present invention, a male thread is provided on the fastener, a screw hole is provided on the side end surface of the battery module, and the screw hole is used to engage with the male thread on the fastener, and a connection hole is provided on the connection plate, and the connection hole is used to pass the fastener through.

[0019] In any embodiment of the present invention, the connection plate is connected to a side end surface in the width direction of the battery module.

[0020] In an optional embodiment of the present invention, a recessed handle groove is provided on the side end surface of the battery module.

[0021] In any embodiment of the present invention, when the connecting plate is connected to two adjacent battery modules, the connecting plate covers the handle groove.

[0022] In any embodiment of the present invention, two opposite end surfaces of each of two adjacent battery modules are provided with corresponding first electrical connection structures, which are used to electrically connect the two adjacent battery modules.

[0023] In any embodiment of the present invention, two opposite end surfaces of each of two adjacent battery modules are provided with corresponding first limit structures, which are used to define the relative positions of the two adjacent battery modules.

[0024] The energy storage battery of the present invention is realized as follows.

[0025] The energy storage battery includes a base, a control module, and an energy storage unit according to the present invention, and the base and the control module are respectively provided at both ends of the energy storage unit.

[0026] In any embodiment of the present invention, the base and the adjacent battery module are fastened and connected by the connecting structure.

[0027] In any embodiment of the present invention, the control module and the adjacent battery module are fastened and connected by the connection structure.

[0028] In any embodiment of the present invention, the base and the adjacent battery module are provided with a corresponding second electrical connection structure, which is used to electrically connect the base and the adjacent battery module.

[0029] In any embodiment of the present invention, the control module and the adjacent battery module are provided with an appropriate third electrical connection structure, which is used to electrically connect the control module and the adjacent battery module.

[0030] In any embodiment of the present invention, the base and the adjacent battery module are provided with a second limit structure, which is used to determine the relative position of the base and the adjacent battery module.

[0031] In any embodiment of the present invention, a third limit structure is provided between the control module and the adjacent battery module, and the third limit structure is used to determine the relative position between the control module and the adjacent battery module. [Effects of the Invention]

[0032] The present invention has the following beneficial effects over the prior art.

[0033] The energy storage unit provided by the present invention, in terms of stacked battery modules, provides a connection structure on at least one opposing side end surface of each pair of adjacent battery modules, thereby enabling the two adjacent battery modules to be fastened and connected using the connection structure. This not only improves the convenience of assembling multiple battery modules, but also makes it possible to inspect and maintain only the battery modules 300 that require inspection and maintenance by simply removing the battery modules 300 that require inspection and maintenance, without having to remove all of the battery modules when inspection and maintenance is required. This improves the convenience of removing the battery modules when inspecting and maintaining them, and also makes it more efficient to install and remove the energy storage unit.

[0034] The energy storage battery provided by the present invention can increase the convenience of attaching and detaching the energy storage unit by using the energy storage unit provided by the present invention, thereby making the attachment and detachment of the energy storage unit more efficient, and further increase the convenience of attaching and detaching the energy storage battery, making the attachment and detachment of the energy storage battery more efficient. [Brief explanation of the drawings]

[0035] [Figure 1] 1 is a structural conceptual diagram of an optional embodiment of an energy storage unit and an energy storage battery provided by an embodiment of the present invention; [Figure 2] FIG. 2 is a structural schematic diagram of another optional embodiment of the energy storage unit and energy storage battery provided by the embodiment of the present invention. [Figure 3] This is a conceptual diagram of the explosion structure corresponding to Figure 2. [Figure 4] FIG. 3 is a conceptual structural diagram corresponding to FIG. 2 from another perspective. [Figure 5]1 is a structural schematic diagram of a further optional embodiment of an energy storage unit and an energy storage battery provided by an embodiment of the present invention. FIG. [Figure 6] 1 is a structural conceptual diagram of a battery module of an energy storage unit and an energy storage battery provided by an embodiment of the present invention in a first view. FIG. [Figure 7] FIG. 2 is a structural conceptual diagram of a battery module of an energy storage unit and an energy storage battery provided by an embodiment of the present invention in a second view. [Figure 8] FIG. 2 is a structural conceptual diagram of a battery module of an energy storage unit and an energy storage battery provided by an embodiment of the present invention in a third view. [Figure 9] 1 is a structural conceptual diagram of a control module of an energy storage battery provided by an embodiment of the present invention; FIG. [Explanation of symbols]

[0036] 1 - convex pillar; 2 - screw hole; 3 - upper electrical connector; 5 - lower electrical connector; 6 - positioning hole; 100 - base; 200 - connection plate; 201 - connection hole; 300 - battery module; 301 - cover plate; 302 - handle groove; 306 - external boss; 500 - control module; 501 - control cover plate; 504 - display structure; 505 - external wiring groove; 600 - screw. DETAILED DESCRIPTION OF THE INVENTION

[0037] In order to allow those skilled in the art to better understand the technical solution of the present invention, the lining device and semiconductor processing device provided by the embodiments of the present invention will be described in detail below in conjunction with the drawings, which are all simplified structural conceptual diagrams and are only used to schematically explain the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0038] Example 1 1 to 8 , this embodiment provides an energy storage unit, which includes a connection structure and at least two battery modules 300, the at least two battery modules 300 being stacked, and at least one pair of opposing side end surfaces of each of two adjacent battery modules 300 being provided with a connection structure, the connection structure being used to fasten the two adjacent battery modules 300. That is, the fastening connection between the two battery modules 300 is realized by fastening the at least one pair of opposing side end surfaces of each of the two adjacent battery modules 300, i.e., the fastening connection between the two adjacent battery modules 300 can be achieved by fastening the at least one pair of opposing side end surfaces of each of the two adjacent battery modules 300 with the connection structure.

[0039] In the energy storage unit provided by the embodiments of the present invention, with respect to the stacked battery modules 300, a connecting structure is provided on at least one opposing side end surface of each pair of adjacent battery modules 300, so that the two adjacent battery modules 300 can be fastened and connected using the connecting structure. This not only improves the convenience of assembling a plurality of battery modules 300, but also makes it possible to inspect and maintain some battery modules 300 without having to remove all of the battery modules 300, by simply removing the connecting structure connected to the battery module 300 that requires inspection and maintenance. Therefore, by only locally removing the plurality of battery modules 300 in the energy storage unit, the battery modules 300 that require inspection and maintenance can be inspected and maintained. This improves the convenience of removal when inspecting and maintaining the battery modules 300, and also makes the installation and removal of the energy storage unit more efficient.

[0040] From the perspective of assembly efficiency and the cost of the overall structure, when the drawings of this embodiment are combined, it can be seen that the connection structure can be used only to realize the connection between one pair of opposing side end surfaces of each of two adjacent battery modules 300, that is, by fastening and connecting only one pair of opposing side end surfaces of each of two adjacent battery modules 300 using the connection structure, the number of connection structures used can be reduced, thereby improving the assembly efficiency of each of two adjacent battery modules 300 while reducing the cost of the overall structure of the energy storage unit.

[0041] For example, in the case of three battery modules 300 stacked vertically, from bottom to top, the connection structure fastens the top portion of the lowest battery module 300 to the bottom portion of the middle battery module 300. Furthermore, the top portion of the middle battery module 300 is fixed to the bottom portion of the uppermost battery module 300 by the connection structure, thus completing the snap connection between the middle battery module 300 and the top battery module 300. That is, three battery modules 300 are stacked vertically, and a position near the top of a pair of opposing side end faces of the middle battery module 300 is fastened to a position near the bottom of a pair of opposing side end faces of the upper battery module 300 using a connection structure, thereby realizing the fastening connection between the middle battery module 300 and the upper battery module 300; and a position near the bottom of a pair of opposing side end faces of the middle battery module 300 is fastened to a position near the top of a pair of opposing side end faces of the lower battery module 300 using a connection structure, thereby realizing the fastening connection between the middle battery module 300 and the lower battery module 300. Based on the above, through the above process, the three battery modules 300 are overall fixed after being stacked vertically. That is, with regard to the energy storage unit of this embodiment, regardless of how many battery modules 300 the energy storage unit includes, it is only necessary that there be a connection structure between each two adjacent battery modules 300, and such a structure is convenient for expanding or reducing the volume of the energy storage unit according to actual usage needs during a specific usage process.

[0042] However, the stacking method of the at least two battery modules 300 is not limited to the vertical stacking.

[0043] In this embodiment, the connection structure may include a connection plate 200 and a fastener, and the fastener is used to fasten the connection plate 200 to the battery module 300. It should be noted here that the specific shape of the connection plate 200 is not absolutely limited in this embodiment, and the connection plate 200 may have a flat structure, or may be manufactured to fit the specific shape of the side end surface of the battery module 300 on which the connection plate 200 is to be disposed. In other words, the shape of the connection plate 200 can be adjusted according to the side end surface of the battery module 300 to be connected thereto. Therefore, there is no need to modify the battery module 300; simply modifying the connection plate 200 allows the connection plate 200 to fasten two adjacent battery modules 300 together. This minimizes the need to modify the battery module 300 itself, while still achieving the effect of connecting multiple battery modules 300.

[0044] As an optional embodiment, an example is given. Considering the convenience and efficiency of installation and removal, the fastener in this embodiment may include a screw 600. Based on this structure, in consideration of engagement with the fastener, a screw hole 2 for fitting with the screw 600 is provided on the side end surface of the battery module 300, and a connection hole 201 suitable for passing the screw 600 is provided on the connection plate 200. In actual application, the screw 600 can be passed through the connection hole 201 and threadedly engaged with the screw hole 2, thereby fastening and connecting the connection plate 200 and the battery module 300 with the screw 600.

[0045] However, the type of fastener is not limited to the screw 600. For example, the fastener may have a male thread, a screw hole 2 may be formed on a side end surface of the battery module 300 to engage with the male thread on the fastener, and a connection hole 201 may be formed on the connection plate 200 to pass through the connection hole 201. In actual application, the fastener may be passed through the connection hole 201, and the male thread of the fastener may be threadedly engaged with the screw hole 2, thereby fastening and connecting the connection plate 200 and the battery module 300 together.

[0046] Regarding the energy storage unit provided by the embodiment of the present invention, a simple connecting plate 200 is used to engage with fasteners to achieve fastening connection of adjacent battery modules 300. This method has a simple structure and relatively low overall material and assembly costs. In addition, the fasteners can be engaged on the battery modules 300 by simply designing, for example, screw holes 2 according to the embodiment of the present invention. In this case, the structure of the battery modules 300 themselves requires little modification, i.e., there is no need to invest excessive cost in improving the structure of the battery modules 300 themselves. This allows the overall cost of the energy storage unit provided by the embodiment of the present invention to be kept within a relatively low range.

[0047] Furthermore, to further explain, the rectangular parallelepiped battery module 300 provided in this embodiment has four vertical side end faces, which are divided into two pairs, one pair of which corresponds to the length of the battery module 300, and the other pair of vertical side end faces corresponds to the width of the battery module 300. Based on this structure, when the connection structure is provided only on one pair of side end faces, in consideration of cost reduction, the connection structure of this embodiment can be attached to the pair of vertical side end faces of the battery module 300 that corresponds to the width of the battery module 300. In other words, when the battery module 300 has multiple pairs of side end faces with different lengths and the connection structure is connected to only one pair of the side end faces, the connection structure can be selected to connect to the shorter pair of side end faces, thereby reducing the length of the connecting plate 200. This not only serves to fix the stacked battery modules 300, but also saves material for the connection plate 200, thereby reducing material costs.

[0048] However, the shape of the battery module 300 is not limited to a rectangular parallelepiped.

[0049] Based on the above structure, in order to further improve the robustness and stability of the vertically stacked battery modules 300 when used in a stacked state, in any embodiment, a corresponding first limit structure may be provided on two opposing end surfaces of each of two adjacent battery modules 300, and the first limit structure is used to determine the relative positions of the two adjacent battery modules. To illustrate an example of the first limit structure with reference to the drawings, in two adjacent battery modules 300, a protruding post 1 is provided on one end of the lower battery module 300 facing the upper battery module 300, and a positioning hole 6 is provided on one end of the upper battery module 300 facing the lower battery module 300, which is used to engage with the protruding post 1. In actual application, when the upper battery module 300 is stacked on the lower battery module 300, the protruding post 1 is inserted into the positioning hole 6, and the protruding post 1 and the positioning hole 6 are used to determine the relative positions of the two adjacent battery modules 300. In this situation, for the same battery module 300, depending on the state of stacking in the vertical direction, a protruding post 1 is provided on the top end surface of the battery module 300, and a positioning hole 6 is provided on the bottom end surface. Of course, the installation positions of the protruding post 1 and the positioning hole 6 here can be interchanged; that is, for the same battery module 300, depending on the state of stacking in the vertical direction, a positioning hole 6 can be provided on the top end surface of the battery module 300, and a protruding post 1 can be provided on the bottom end surface, and this embodiment does not impose any absolute limitations on this.

[0050] When the connection structure is attached to a pair of vertical side end faces corresponding to the width direction of the battery module 300, one side end face is selected from the pair of vertical side end faces corresponding to the length direction of the battery module 300 and used as the cover plate 301 of the battery module 300.In this way, when inspection and maintenance of the battery module 300 is required, the cover plate 301 can be removed and the inspection and maintenance can be performed on the battery module 300 that requires inspection and maintenance.This does not affect the connection structure, and there is no need to remove the energy storage unit in which multiple battery modules 300 are stacked, thereby achieving the effect of inspection and maintenance.

[0051] To further explain the energy storage unit of this embodiment, a recessed handle groove 302 may be formed on the outer wall of the battery module 300, and the handle groove 302 is used for handling operations during production installation and logistics transportation. Using the drawings to illustrate an optional implementation, the handle groove 302 may be formed on a side end surface that is compatible with the connection structure of the battery modules 300. After the connecting plate 200 is connected to two adjacent battery modules 300, the connecting plate 200 can cover the handle groove 302, which can effectively protect the welded joints of the handle and improve the aesthetic appearance of the entire energy storage unit. However, the handle groove 302 here is specifically formed on the battery module 300, and the specific outer wall is not an absolute limitation in this embodiment. For example, the handle groove 302 may be formed on one of a pair of longitudinal side end surfaces of the battery module 300 corresponding to its length direction, where the cover plate 301 is not provided.

[0052] In addition, as an optional implementation, the battery modules 300 employed in the energy storage unit of this embodiment may be provided with outer bosses 306 on their longitudinal side edges corresponding to their widthwise directions to increase the strength of the side edges of the battery modules 300. Based on this structure, the outer bosses 306 may be installed so as to avoid the connection plate 200, or may be covered by the connection plate 200 after the connection plate 200 is connected to two adjacent battery modules 300. In the case where the connection plate 200 covers the outer bosses 306, a structure appropriate for the shape of the outer bosses 306 can be pre-fabricated on the connection plate 200 to meet usage needs. The drawings in this embodiment merely illustrate a configuration in which the connection plate 200 and the outer boss 306 are separate and independent from each other, i.e., a configuration in which the outer boss 306 is installed so as to avoid the connection plate 200, and are not intended to be an absolute limitation.

[0053] Finally, to further explain the energy storage unit of this embodiment, a corresponding first electrical connection structure is provided on two opposing end surfaces of each of two adjacent battery modules 300, and the first electrical connection structure is used to electrically connect the two adjacent battery modules 300, thereby achieving the electrical connection between each of the two adjacent battery modules 300. Referring to the drawings, in terms of the distance of the first electrical connection structure, an upper electrical connector 3 is provided on one end surface of the lower battery module 300 facing the upper battery module 300, and a lower electrical connector 5 engaging with the upper electrical connector 3 is provided on one end surface of the upper battery module 300 facing the lower battery module 300. In actual application, when the upper battery module 300 is stacked on the lower battery module 300, the upper electrical connector 3 and the lower electrical connector 5 are electrically connected, and the upper electrical connector 3 and the lower electrical connector 5 are used to electrically connect the two adjacent battery modules 300. In this situation, for the same battery module 300, due to its vertical stacking state, an upper electrical connector 3 is provided on the top end surface of the battery module 300, and a lower electrical connector 5 is provided on the bottom end surface thereof.

[0054] Example 2 As shown in Figures 1 to 9, based on the energy storage unit of Example 1, this example further provides an energy storage battery including a base 100, a control module 500, and the energy storage unit of Example 1, where the base 100 and the control module 500 are respectively provided at both ends of the energy storage unit.

[0055] The energy storage battery provided by the embodiments of the present invention can utilize the energy storage unit provided by the embodiments of the present invention to improve the convenience of attaching and detaching the energy storage unit, thereby making the attachment and detachment of the energy storage unit more efficient, and further improving the convenience of attaching and detaching the energy storage battery, making the attachment and detachment of the energy storage battery more efficient.

[0056] For example, the base 100 can be connected to the bottom of the battery module 300 located at the bottom of the energy storage unit, and the control module 500 can be connected to the top of the battery module 300 located at the top of the energy storage unit, so that the base 100 and the control module 500 are respectively provided at both ends of the energy storage unit.

[0057] Optionally, the base 100 and the adjacent battery module 300 may be fastened together by a connection structure, and the control module 500 and the adjacent battery module 300 may be fastened together by a connection structure. Note that, as an optional implementation, the connection structure for fastening the base 100 and the energy storage unit and the connection structure for fastening the control module 500 and the energy storage unit may be the same as the connection structure in Example 1. In addition, the specific connection structure here can refer to the specific installation position of the control module 500 on the base 100, i.e., the control module 500 may be located on the corresponding longitudinal side edge surface in the width direction of the base 100.

[0058] In another optional implementation, the side end surface of the control module 500 that is fastened to the connection structure may be provided with an inwardly recessed external wiring groove 505. The external wiring groove 505 is used for external wiring operation and electrical connection of the energy storage battery, and is covered when not in use. Considering this, the connecting plate 200 that fastens and connects the control module 500 to the energy storage unit may be longer in size, that is, the size of the connecting plate 200 that fastens and connects the control module 500 to the battery module 300 adjacent to the control module 500 may be larger than the size of the connecting plate 200 that fastens and connects each of the two adjacent battery modules 300.

[0059] To further explain the control module 500 of this embodiment, one side end face can be selected from a pair of vertical side end faces corresponding to the length of the control module 500 to serve as a control cover plate 501 of the control module 500, which is used for installing and maintaining the energy storage battery. That is, when inspection and maintenance of the control module 500 is required, the control cover plate 501 can be removed to inspect and maintain the control module 500 without being affected by the connection structure. Another side end face can be selected from the pair of vertical side end faces corresponding to the length of the control module 500 to provide an indicator structure 504 for indicating the operating status of the energy storage battery.

[0060] Furthermore, in this embodiment, the base 100 and the adjacent battery module 300 are provided with a corresponding second electrical connection structure, and the control module 500 and the adjacent battery module 300 are provided with a corresponding third electrical connection structure. The second and third electrical connection structures here may be similar to the first electrical connection structure in the first embodiment and will not be further described here. However, because the control module 500 is located at the top of the energy storage battery, it is only necessary to install the lower electrical connector 5, which is compatible with the battery module 300 located at the top of the energy storage unit, at the bottom of the control module 500, and it is not necessary to install the upper electrical connector 3 at the top of the control module 500. On the other hand, because the base 100 is located at the bottom of the energy storage battery, it is only necessary to install the upper electrical connector 3, which is compatible with the battery module 300 located at the bottom of the energy storage unit, at the top of the base 100, and it is not necessary to install the lower electrical connector 5 at the bottom of the base 100.

[0061] Based on the above structure, to further enhance the robustness and stability of the energy storage battery during use, in any embodiment, a second limit structure may be provided between the base 100 and the adjacent battery module 300, and a third limit structure may be provided between the control module 500 and the adjacent battery module 300. The second and third limit structures here may be similar to the first limit structure in Example 1 and will not be further described here. However, because the control module 500 is located at the top end of the energy storage battery, it is only necessary to provide a positioning hole 6 at the bottom of the control module 500, which is compatible with the battery module 300 located at the top of the energy storage unit, and it is not necessary to provide a protruding post 1 at the top of the control module 500. Because the base 100 is located at the bottom end of the energy storage battery, it is only necessary to provide a protruding post 1 at the top of the base 100, which is compatible with the battery module 300 located at the bottom of the energy storage unit, and it is not necessary to provide a positioning hole 6 at the bottom of the base 100.

[0062] In light of the above, the energy storage unit and energy storage battery provided by the embodiments of the present invention can improve the convenience of installation and removal of the energy storage unit, thereby making installation and removal more efficient. Furthermore, the energy storage unit and energy storage battery provided by the embodiments of the present invention achieves the fastening connection of adjacent battery modules 300 by engaging fasteners using a simple connecting plate 200. This method has a simple structure and relatively low overall material and assembly costs. In addition, it is only necessary to design the battery modules 300 with fasteners, for example, screw holes 2 according to the embodiments of the present invention, which can be engaged with the fasteners. In this case, the structure of the battery modules 300 themselves requires little modification, i.e., there is no need to invest excessive costs in improving the structure of the battery modules 300 themselves. This allows the overall cost of the energy storage unit provided by the embodiments of the present invention to be kept relatively low.

[0063] It is understood that the above embodiments are merely exemplary embodiments adopted to explain the principles of the present invention, but the present invention is not limited thereto. Those skilled in the art can make various modifications and improvements without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the protection scope of the present invention.

[0064] It should be understood that in describing the present invention, terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, are merely for the purpose of facilitating and simplifying the description of the present invention, and do not indicate or imply that the indicated device or element must have a particular orientation, be configured and operated in a particular orientation, and cannot be understood as limiting the present invention.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "attached," "connected to each other," "connected," "fixed," "fastened," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, an internal connection between two elements, or an interactive relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0066] In describing this invention, the orientations or positions indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "longitudinal," "top," and "bottom" are based on the orientations or positions shown in the drawings or are the orientations or positions normally placed when using the product of this invention, and are merely for ease of description and brevity of explanation. They do not indicate or imply that the indicated devices or elements must be configured or operated in a particular orientation, and cannot be understood as limiting the invention. Furthermore, terms such as "first," "second," and "third" are used for distinction purposes only and cannot be understood as indicating or implying relative importance.

[0067] Furthermore, terms such as "horizontal," "vertical," "drooping," and "longitudinal" do not require that a part be absolutely horizontal or drooping, and may be slightly tilted. For example, "horizontal" simply means that the direction is more horizontal than "vertical," and the structure does not need to be perfectly horizontal and may be slightly tilted.

[0068] In the present invention, unless otherwise clearly specified or limited, the term "first feature" may include a state where the first and second features are in direct contact above or below the second feature, or may include a state where the first and second features are not in direct contact but are in contact via another feature between them. Furthermore, the term "first feature" may include a state where the first feature is directly above or diagonally above the second feature above, above, and on the upper surface of the second feature, or may simply mean that the horizontal height of the first feature is higher than that of the second feature. The term "first feature" may include a state where the first feature is directly below or diagonally below the second feature below, below, and on the lower surface of the second feature, or may simply mean that the horizontal height of the first feature is smaller than that of the second feature.

Claims

1. a connection structure and at least two battery modules, the at least two battery modules being stacked in a vertical direction such that a bottom of one battery module is in contact with a top of the other battery module, and the connection structure is provided on at least a pair of opposing side end surfaces in the width direction of each of two adjacent battery modules, the connection structure being used to fasten and connect the two adjacent battery modules; wherein the pair of opposing side end faces of the lower battery module are fastened and connected at positions near the top and near the bottom of the pair of opposing side end faces of the upper battery module by the connection structure; the connection structure includes a connection plate and a fastener, the fastener being used to fasten and connect the connection plate and the battery module; The fastener has a male screw, and the battery module has a side end surface provided with a screw hole for engaging with the male screw on the fastener. The connecting plate has a connecting hole for passing the fastener through the connecting hole.

1. An energy storage unit comprising:

2. A recessed handle groove is provided on the side end surface of the battery module.

10. The energy storage unit of claim 1.

3. When the connecting plate is connected to two adjacent battery modules, the connecting plate covers the handle groove.

3. The energy storage unit of claim 2.

4. Two opposite end surfaces of each of the two adjacent battery modules are provided with corresponding first electrical connection structures, and the first electrical connection structures are used to electrically connect the two adjacent battery modules.

10. The energy storage unit of claim 1.

5. Two opposite end surfaces of each of the two adjacent battery modules are provided with corresponding first limit structures, and the first limit structures are used to define the relative positions of the two adjacent battery modules.

10. The energy storage unit of claim 1.

6. The energy storage unit according to any one of claims 1 to 5 includes a base, a control module, and the base and the control module are provided at both ends of the energy storage unit, respectively. An energy storage battery characterized by:

7. The base and the adjacent battery module are fastened and connected by the connection structure.

7. The energy storage battery of claim 6.

8. The control module and the adjacent battery module are fastened and connected by the connection structure.

7. The energy storage battery of claim 6.

9. The base and the adjacent battery module are provided with a corresponding second electrical connection structure, which is used to electrically connect the base and the adjacent battery module.

7. The energy storage battery of claim 6.

10. The base and the adjacent battery module are provided with a corresponding second electrical connection structure, which is used to electrically connect the base and the adjacent battery module.

8. The energy storage battery of claim 7.

11. The control module and the adjacent battery module are provided with a corresponding third electrical connection structure, which is used to electrically connect the control module and the adjacent battery module.

7. The energy storage battery of claim 6.

12. The control module and the adjacent battery module are provided with a corresponding third electrical connection structure, which is used to electrically connect the control module and the adjacent battery module.

9. The energy storage battery of claim 8.

13. The base and the adjacent battery module are provided with second limit structures, which are used to define the relative positions of the base and the adjacent battery module.

7. The energy storage battery of claim 6.

14. The base and the adjacent battery module are provided with second limit structures, which are used to define the relative positions of the base and the adjacent battery module.

8. The energy storage battery of claim 7.

15. A third limit structure is provided between the control module and the adjacent battery module, and the third limit structure is used to define the relative position between the control module and the adjacent battery module.

7. The energy storage battery of claim 6.

16. A third limit structure is provided between the control module and the adjacent battery module, and the third limit structure is used to define the relative position between the control module and the adjacent battery module.

9. The energy storage battery of claim 8.

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