Energy storage device and energy storage system

Abstract

The utility model relates to the technical field of energy storage, and discloses an energy storage device and an energy storage system.The energy storage device comprises a box body, a door body and a battery single body assembly, a containing cavity with a containing opening is formed in the box body, the door body is detachably arranged on the box body through a connecting assembly to open or close the containing opening, and the battery single body assembly comprises a plurality of battery single bodies; and the battery monomer assembly is arranged in the accommodating cavity. According to the energy storage device, redundant steps in the opening and closing process of the door body are reduced, the time needed in the opening and closing process of the door body is saved, then efficient assembly of the energy storage device is achieved, the assembly efficiency of the energy storage device is improved, and the assembly difficulty of the energy storage device is reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage device and an energy storage system. Background Art

[0002] The energy storage device generally includes a box and a battery cell assembly. The box is provided with a switchable door to facilitate the placement of the battery cell assembly in the box, thereby protecting and supporting the battery cell assembly.

[0003] However, the assembly of existing energy storage devices is time-consuming and labor-intensive, which affects the assembly efficiency of the energy storage devices and increases the difficulty of assembling the energy storage devices. Utility Model Content

[0004] The embodiments of the present application provide an energy storage device and an energy storage system, which can reduce the difficulty of assembling the energy storage device and improve the assembly efficiency of the energy storage device.

[0005] In a first aspect, an embodiment of the present application provides an energy storage device, comprising: a box body and a door body, wherein the box body is provided with a accommodating cavity having a placement opening, and the door body is detachably provided on the box body through a connecting assembly to open or close the placement opening; a battery cell assembly, wherein the battery cell assembly includes a plurality of battery cells, and the battery cell assembly is provided in the accommodating cavity.

[0006] In the above technical solution, the door body is arranged to be detachably mounted on the box body through a connecting assembly to open or close the placement opening. In this way, during the assembly of the battery cell assembly, the door body can avoid having to go through multiple switching states in the process of opening or closing the placement opening, thereby reducing unnecessary steps in the door body during the opening and closing process, thereby saving the time required for the door body during the opening and closing process, and realizing efficient assembly of the energy storage device, thereby improving the assembly efficiency of the energy storage device.

[0007] In some embodiments, the door body is rotatable relative to the box body through the connecting assembly.

[0008] In the above technical solution, while the door body can be used to effectively close the placement opening, the difficulty of disassembling the door body can also be reduced.

[0009] In some embodiments, the connecting assembly includes a first part and a second part, the first part is fixed to the box body, the second part is fixed to the door body, and the first part and the second part are plug-fitted.

[0010] In the above technical solution, the first part and the second part are used to realize the detachable fit of the door body and the box body, and the difficulty of detachable fit of the door body and the box body is reduced, thereby reducing the difficulty of assembling the energy storage device.

[0011] In some embodiments, one of the first part and the second part is provided with a socket extending in a vertical direction and the other is provided with a mating shaft, and the mating shaft is detachably plugged into the socket.

[0012] In the above technical solution, the first part and the second part are plug-fitted together, so that the first part and the second part can be used to realize the detachable fitting of the door body and the box body, thereby reducing the difficulty of fitting the door body and the box body.

[0013] In some embodiments, in the vertical direction, the door body is detachably matched with the box body through a plurality of the connecting components.

[0014] In the above technical solution, the cooperation of multiple connecting components can increase the cooperation strength between the door body and the box body, so that the relative position of the door body and the box body is stable, which is beneficial to improving the structural stability of the energy storage device.

[0015] In some embodiments, the receptacle is defined by a partial coiling of the first portion.

[0016] In the above technical solution, the difficulty of forming the jack is reduced, and at the same time, it is avoided to open a hole on the first part to form the jack, which ensures the structural strength of the first part to a certain extent and improves the working performance of the first part.

[0017] In some embodiments, the energy storage device further includes an explosion-proof region, wherein the explosion-proof region is configured to break when the pressure in the accommodating chamber reaches a set condition to discharge the pressure in the accommodating chamber.

[0018] In the above technical solution, the explosion-proof area can be used to play a directional explosion-relief role, thereby improving the safety and reliability of the energy storage device.

[0019] In some embodiments, the explosion-proof area is provided in the connecting component.

[0020] In the above technical solution, the explosion-proof area and the connection component are integrated, which not only improves the safety and reliability of the energy storage device, but also avoids the setting of explosion-proof windows, simplifies the structure of the energy storage device, and reduces the manufacturing cost of the energy storage device.

[0021] In some embodiments, the connecting assembly includes a first part and a second part, the first part is fixed to the box body, the second part is fixed to the door body, one of the first part and the second part is provided with a socket and the other is provided with a mating shaft, and the side walls of the mating shaft and / or the socket are provided with notches to define the explosion-proof area.

[0022] In the above technical solution, the explosion-proof area is set in the connecting component, so that the connecting component forms a two-in-one structure of connection and pressure relief, thereby improving the safety and reliability of the energy storage device and simplifying the structure of the energy storage device.

[0023] In some embodiments, the other of the first part and the second part includes a main body and a protrusion, the main body is fixed to the door body or the box body, the protrusion is arranged on one side of the main body, the mating axis is arranged on the protrusion, and the protrusion is suitable for stopping at the end face of the socket.

[0024] In the above technical solution, the stop-and-stop fit between the first part and the second part is achieved, which facilitates the use of gravity to limit the first part and the second part to each other, thereby improving the relative position stability of the first part and the second part, and further improving the structural stability of the connecting component, so as to facilitate the use of the connecting component to achieve stable fit between the door body and the box body.

[0025] In some embodiments, a portion of the mating shaft adjacent to the protrusion is provided with the notch.

[0026] In the above technical solution, after the mating shaft is plugged into the socket, the scoring device is prevented from being inserted into the socket to a certain extent, thereby preventing the side wall of the socket from blocking the scoring to a certain extent, making it easier to achieve the mating connection between the scoring and the accommodating cavity, so that when the pressure in the box increases to a certain level, the scoring can automatically break, thereby improving the safety and reliability of the energy storage device.

[0027] In some embodiments, the side wall of the socket is provided with a plurality of notches extending along its axial direction to define the explosion-proof area.

[0028] In the above technical solution, the area of ​​the notch is increased, which makes it easier to use the notch to release pressure and improve the safety and reliability of the energy storage device.

[0029] In some embodiments, the battery cell assemblies are divided into multiple groups, each group of battery cells includes multiple battery cells, and the multiple groups of battery cell assemblies are arranged at intervals; the box body is provided with multiple placement openings, and the multiple placement openings are arranged one-to-one corresponding to the multiple groups of battery cell assemblies; each of the placement openings is opened or closed by the detachable door body.

[0030] In the above technical solution, while increasing the number of battery cells in the energy storage device, each battery cell assembly can be placed in the accommodating cavity through the corresponding placement opening, reducing the difficulty of assembling multiple battery cell assemblies.

[0031] In a second aspect, an embodiment of the present application provides an energy storage system, comprising a power conversion device and the aforementioned energy storage device, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0032] In the above technical solution, by adopting the aforementioned energy storage device, the difficulty of assembling the energy storage system can be reduced.

[0033] Additional aspects and advantages of the present application will become apparent from the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 is a schematic diagram of an energy storage system according to some embodiments of the present application;

[0036] Figure 2 is a schematic diagram of a battery cell assembly according to some embodiments of the present application;

[0037] Figure 3 is a schematic diagram of a partial structure of an energy storage device according to some embodiments of the present application;

[0038] Figure 4 for Figure 3 A partial enlarged view of the middle region I;

[0039] Figure 5 for Figure 3 A side view of the energy storage device;

[0040] Figure 6 for Figure 3 A front view of the energy storage device;

[0041] Figure 7 is a schematic diagram of a connection assembly according to some embodiments of the present application;

[0042] Figure 8 is a front view of a connection assembly according to some embodiments of the present application;

[0043] Figure 9 is a side view of a connection assembly according to some embodiments of the present application;

[0044] Figure 10 is a back view of a connection assembly according to some embodiments of the present application;

[0045] Figure 11 is a top view of a connection assembly according to some embodiments of the present application;

[0046] Figure 12A front view of the first part according to some embodiments of the present application;

[0047] Figure 13 is a side view of a first portion according to some embodiments of the present application;

[0048] Figure 14 is a top view of a first portion according to some embodiments of the present application;

[0049] Figure 15 is a front view of the second part according to some embodiments of the present application;

[0050] Figure 16 for Figure 15 A partial magnified view of the middle region II;

[0051] Figure 17 is a side view of the second part according to some embodiments of the present application;

[0052] Figure 18 is a top view of the second part according to some embodiments of the present application;

[0053] Figure 19 is a front view of the second part according to some other embodiments of the present application;

[0054] Figure 20 is a side view of the second part according to some other embodiments of the present application;

[0055] Figure 21 This is a main view of the first part according to some further embodiments of the present application.

[0056] Reference numerals:

[0057] 100. Energy storage device;

[0058] 110. Box body; 111. Matching portion;

[0059] 120, door body;

[0060] 130. Connecting components;

[0061] 131. First part; 1311. Insertion hole; 1312. First mounting hole;

[0062] 132, Part II;

[0063] 1321, mating shaft; 1322, main body; 1323, protruding portion; 1324, second mounting hole;

[0064] 140. Explosion-proof area; 141. Notch;

[0065] 150, locking member; 151, first locking portion; 152, second locking portion;

[0066] 200. Battery monomer assembly;

[0067] 210, housing; 211, base; 212, upper cover;

[0068] 220, battery cell;

[0069] 300. Energy storage system. DETAILED DESCRIPTION

[0070] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0071] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only 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-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0072] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0073] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0074] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0075] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0076] The term "plurality" used in this application refers to more than two, including two.

[0077] In this application, a battery cell can be a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., and this embodiment of the application does not limit this. Furthermore, a battery cell can be cylindrical, flat, rectangular, or in other shapes, and this embodiment of the application does not limit this. Battery cells are generally divided into three types based on packaging: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and this embodiment of the application does not limit this.

[0078] For example, a battery cell typically includes a packaging layer, an electrode assembly, and an electrolyte. The packaging layer is used to accommodate the electrode assembly and electrolyte, and is provided with at least one positive electrode column and at least one negative electrode column. The electrode assembly includes one or more electrodes, and the electrode assembly is formed by stacking or winding a positive electrode sheet, a negative electrode sheet, and a separator.

[0079] Among them, the positive electrode sheet generally includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is directly or indirectly coated on the positive electrode current collector. Multiple positive electrode tabs are stacked together and electrically connected to the positive electrode column. For example, the stacked multiple positive electrode tabs can be directly welded to the positive electrode column to form an electrical connection; alternatively, the battery cell may further include a positive electrode adapter. The stacked multiple positive electrode tabs are welded to one end of the positive electrode adapter, and the other end of the positive electrode adapter is welded to the positive electrode column to form an electrical connection between the positive electrode tab and the positive electrode column.

[0080] A negative electrode sheet generally includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is directly or indirectly coated on the negative electrode current collector. Multiple negative electrode tabs are stacked together and electrically connected to the negative electrode post. For example, the stacked multiple negative electrode tabs can be directly welded to the negative electrode post to form an electrical connection. Alternatively, the battery cell may further include a negative electrode adapter. The stacked multiple negative electrode tabs are welded to one end of the negative electrode adapter, and the other end of the negative electrode adapter is welded to the negative electrode post to form an electrical connection between the negative electrode tabs and the negative electrode post.

[0081] The material of the isolation film is not limited, and can be, for example, polypropylene or polyethylene.

[0082] Currently, market developments indicate that battery cells are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace applications. Multiple battery cells are combined to form a battery cell assembly.

[0083] That is, a battery cell assembly can be understood as a single physical module that includes multiple battery cells to provide higher voltage and capacity. For example, the battery cell assembly mentioned in this application may include one or more battery packs to provide voltage and capacity. The battery pack may include multiple battery cells, and the multiple battery cells are connected in series, parallel, or hybrid via a busbar.

[0084] In some embodiments, a battery pack is typically formed by arranging multiple battery cells. For example, the battery pack may be a battery module, which is formed by arranging and securing multiple battery cells into a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0085] In some embodiments, as Figure 2 As shown, the battery cell assembly 200 generally includes a shell 210 for encapsulating one or more battery packs. The shell 210 can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell 220 to a certain extent; of course, the battery cell assembly 200 may also not include the shell 210.

[0086] In a specific example, the battery cell assembly 200 can be understood as a battery pack.

[0087] In some embodiments, as Figure 2As shown, the battery cell assembly 200 includes a battery cell 220 and a housing 210, wherein the battery cell 220 is disposed within the housing 210. The housing 210 supports and protects the battery cell 220, thereby improving the structural stability of the battery cell 220, extending the service life of the battery cell 220, and enhancing the safety of the battery cell 220.

[0088] The housing 210 may have various structures.

[0089] In some embodiments, as Figure 2 As shown, the shell 210 may include a base 211 and an upper cover 212, and the base 211 and the upper cover 212 cover each other. The base 211 and the upper cover 212 jointly define a cavity for accommodating the battery cell 220, so as to reduce the difficulty of molding the shell 210, thereby facilitating the placement of the battery cell 220 in the shell 210.

[0090] The base 211 may be a hollow structure with one end open, the upper cover 212 may be a plate-shaped structure, and the upper cover 212 covers the open side of the base 211 (not shown in the example figure), so that the base 211 and the upper cover 212 jointly define a chamber; or, the upper cover 212 may be a hollow structure with one end open, the base 211 may be a plate-shaped structure (not shown in the example figure), and the base 211 covers the open side of the upper cover 212, so that the base 211 and the upper cover 212 can also jointly define a chamber; or, Figure 2 As shown, the base 211 and the upper cover 212 are both hollow structures with one side open, and the open side of the base 211 covers the open side of the upper cover 212 to define a chamber.

[0091] It should be noted that the housing 210 formed by the base 211 and the upper cover 212 can be in various shapes, such as cylinder, cube or cuboid; the battery cell 220 can be in various shapes, such as cylinder, square and so on.

[0092] It should also be noted that existing battery cell assemblies need to be placed in a box whether during transportation or in actual use. The box is generally used to support and protect the battery cell assemblies to improve the working performance of the battery cell assemblies.

[0093] Among them, when the battery cell assembly is placed in a box during transportation, the box can be understood as a container, and the energy storage device can be understood as a device for storing the battery cell assembly to facilitate the transportation of the battery cell assembly; when the battery cell assembly is placed in a box during the specific use of the battery cell assembly, the box can be understood as a shell surrounding the battery cell assembly, and a connector electrically connected to the battery cell assembly can be provided on the shell. At this time, the energy storage device formed by the combination of the battery cell assembly and the box can be understood as a device for storing electrical energy, that is, the box forms the shell of the energy storage device, and the energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example: the energy storage device can be used to store electrical energy during low electricity consumption, and to provide electrical energy to relevant users or electrical equipment during peak electricity consumption; or, when the energy storage device is not in use, the energy storage device is used to store electrical energy, and when the user needs electricity, the energy storage device is used to provide electrical energy to relevant users or electrical equipment to improve the user experience.

[0094] In other words, this application Figure 3 The energy storage device 100 shown in the figure can be a device for storing battery cell assemblies 200 during transportation of the battery cell assemblies 200, in which case the box body 110 is formed as a container; the energy storage device 100 can also be a device for storing electrical energy, that is, the energy storage device 100 can store electrical energy and output electrical energy at an appropriate time, in which case the box body 110 is formed as the outer shell of the energy storage device 100.

[0095] In a specific example, a housing cavity with a placement opening is generally provided in the box body, and the battery cell assembly is placed in the housing cavity through the placement opening to achieve the placement of the battery cell assembly in the box body; or, the battery cell assembly is moved out of the housing cavity through the placement opening to facilitate disassembly of the battery cell assembly.

[0096] At the same time, in order to better protect the battery cell assembly, a door is provided at the placement opening of the box body, and the door is used to open or close the placement opening.

[0097] However, the applicant has found that the existing door body needs to go through multiple opening and closing states during the opening and closing process, which makes the opening and closing of the door body time-consuming and labor-intensive, affects the assembly efficiency of the energy storage device, and increases the difficulty of assembling the energy storage device.

[0098] In order to solve the above problems, combined Figure 3-Figure 21As shown, an embodiment of the present application provides an energy storage device 100, wherein the door body 120 of the energy storage device 100 is detachably provided on the box body 110 through a connecting component 130 to open or close the placement opening, so that when opening or closing the placement opening, the door body 120 can be directly controlled to be disassembled relative to the box body 110, eliminating the need for the door body 120 to go through multiple opening and closing steps in the process of opening or closing the placement opening, thereby reducing redundant steps in the opening and closing process of the door body 120, saving the time required for the opening and closing process of the door body 120, and realizing efficient assembly of the battery cell assembly 200 and the box body 110, thereby improving the assembly efficiency of the energy storage device 100, reducing the assembly difficulty of the energy storage device 100, and facilitating the installation and maintenance of the battery cell assembly 200.

[0099] The embodiment of the present application further provides an energy storage system 300 (e.g. Figure 1 ), so as to improve the assembly efficiency of the energy storage system 300.

[0100] The energy storage system 300 includes but is not limited to a wind power generation system, a solar power generation system, a mobile power system or a temporary power supply system.

[0101] The energy storage device 100 according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0102] Combine Figure 2 and Figure 3 As shown, the energy storage device 100 of the embodiment of the present application includes: a box body 110, a door body 120 and a battery cell assembly 200.

[0103] The box body 110 is provided with a receiving cavity (not shown in the figure) having a placement opening. Figure 3 As shown, the door 120 is detachably mounted on the housing 110 via a connecting assembly 130 to open or close the placement opening. This refers to a housing 110 having a receiving cavity with a placement opening to facilitate placement of structural components (e.g., battery cell assembly 200) into the receiving cavity or removal of structural components from the housing 110 through the placement opening.

[0104] At the same time, by setting the door body 120 to open or close the placement opening, while ensuring that the structural parts can be placed in the accommodating cavity or moved out of the box body 110 through the placement opening, the placement opening can be closed after the structural parts are placed in the accommodating cavity, thereby preventing the structural parts in the accommodating cavity from being moved out through the placement opening to a certain extent, thereby achieving the purpose of supporting the structural parts in the accommodating cavity, and also preventing external foreign matter, dust, water stains, etc. from entering the accommodating cavity through the placement opening to a certain extent, thereby achieving the purpose of protecting the structural parts in the accommodating cavity.

[0105] It is worth noting that the present application configures the door body 120 to be detachably mounted on the box body 110 through the connecting assembly 130 to open or close the placement opening. That is to say, when the placement opening needs to be opened, the present application directly removes the door body 120 from the box body 110 through the connecting assembly 130; when the placement opening needs to be sealed, the door body 120 can be directly installed on the box body 110 through the connecting assembly 130, eliminating the need for the door body 120 to go through multiple switching steps in the process of opening or closing the placement opening, thereby reducing redundant steps of the door body 120 in the switching process, saving the time required for the door body 120 in the switching process, and realizing efficient assembly of the structural parts and the box body 110, thereby improving the assembly efficiency of the energy storage device 100, reducing the assembly difficulty of the energy storage device 100, and improving the user experience.

[0106] It should be noted that the connecting component 130 here can be in any form as long as it can achieve the detachable fit of the door body 120 and the box body 110, such as: the connecting component 130 is a combination of a connecting column and a connecting hole, the connecting column and the connecting hole are plugged in and fixedly matched, one of the connecting column and the connecting hole is provided on the door body 120, and the other is provided on the box body 110, so as to utilize the connecting component 130 to achieve the detachable fit of the door body 120 and the box body 110; or, the connecting component 130 is a combination of a clip and a slot, the clip and the slot are snap-fitted, one of the clip and the slot is provided on the door body 120, and the other is provided on the box body 110, and the connecting component 130 can also be used to achieve the detachable fit of the door body 120 and the box body 110.

[0107] like Figure 2 As shown, the battery cell assembly 200 includes a plurality of battery cells 220, and the battery cell assembly 200 is disposed in the receiving cavity. The battery cell assembly 200 is disposed in the box 110, thereby facilitating the use of the box 110 to support and protect the battery cell assembly 200, reducing the difficulty of transporting the battery cell assembly 200, extending the service life of the battery cell assembly 200, and improving the working performance of the battery cell assembly 200.

[0108] At the same time, by configuring the battery cell assembly 200 to include a plurality of battery cells 220 , the cooperation of the plurality of battery cells 220 can increase the capacity of the battery cell assembly 200 , which is beneficial to improving the energy storage performance of the energy storage device 100 .

[0109] It should also be noted that by configuring the door body 120 to be detachably provided on the box body 110 through the connecting assembly 130 to open or close the placement opening, since the battery cell assembly 200 is provided in the accommodating cavity of the box body 110, the difficulty of assembling the battery cell assembly 200 and the box body 110 can be effectively reduced, and the efficient assembly of the battery cell assembly 200 and the box body 110 can be facilitated, thereby facilitating the installation, disassembly and maintenance of the battery cell assembly 200.

[0110] As can be seen from the above structure, the energy storage device 100 of the embodiment of the present application, by configuring the door body 120 to be detachably provided on the box body 110 through the connecting component 130 to open or close the placement opening, allows the door body 120 to be directly removed from the box body 110 during the assembly or disassembly of the battery cell assembly 200, thereby opening the placement opening, reducing the difficulty of assembling and disassembling the battery cell assembly 200, and reducing the difficulty of assembling the energy storage device 100; at the same time, after the battery cell assembly 200 is assembled into the accommodating cavity, the door body 120 can also be directly installed on the box body 110 using the connecting component 130 to achieve a sealed placement opening, thereby achieving the purpose of protecting the battery cell assembly 200.

[0111] Through the above-mentioned arrangement, the door body 120 can be saved from the need to go through multiple opening and closing steps during the process of opening or closing the placement port, thereby reducing unnecessary steps in the opening and closing process of the door body 120, saving the time required for the opening and closing process of the door body 120, and realizing efficient assembly of the battery cell assembly 200 and the box body 110, thereby improving the assembly efficiency of the energy storage device 100, and reducing the assembly difficulty of the energy storage device 100, so that the battery cell assembly 200 can be quickly assembled and disassembled.

[0112] It can be understood that compared with the prior art in which the door body 120 needs to go through multiple switching states during the assembly process, the present application directly detachably arranges the door body 120 on the box body 110 to realize the opening and closing of the door body 120, which effectively saves the time required for the door body 120 in the opening and closing process, realizes the efficient assembly of the battery cell assembly 200 and the box body 110, thereby improving the assembly efficiency of the energy storage device 100 and reducing the difficulty of assembling the energy storage device 100.

[0113] In some embodiments, the door 120 is rotatable relative to the box body 110 via the connecting assembly 130. It can be understood that the door 120 is not only detachably mounted on the box body 110 via the connecting assembly 130, but is also rotatable relative to the box body 110 via the connecting assembly 130. This allows the door 120 to be positioned relative to the box body 110, making it easier to adjust its position relative to the box body 110, so that the door 120 can be used to effectively seal the placement opening and ensure the working performance of the door 120.

[0114] At the same time, the above arrangement can also facilitate adjustment of the position of the door body 120 relative to the box body 110 before disassembling the door body 120 , thereby facilitating disassembly of the door body 120 and reducing the difficulty of disassembly of the door body 120 .

[0115] That is to say, by arranging the door body 120 to be rotatable relative to the box body 110, the placement opening can be effectively closed by the door body 120, while the difficulty of disassembling the door body 120 can be reduced.

[0116] In some embodiments, as Figure 3 and Figure 6 As shown, the connecting assembly 130 includes a first portion 131 and a second portion 132. The first portion 131 is fixed to the housing 110, and the second portion 132 is fixed to the door 120. The first portion 131 and the second portion 132 are pluggable and mated. This allows the door 120 and the housing 110 to be pluggable and mated, thereby achieving detachable mating between the door 120 and the housing 110, and reducing the difficulty of detachable mating between the door 120 and the housing 110, thereby reducing the difficulty of assembling the energy storage device 100.

[0117] In some embodiments, the energy storage device 100 further includes a first fastener and a second fastener, Figure 7 、 Figure 8 and Figure 10 As shown, the first portion 131 is provided with at least one first mounting hole 1312, and the first fastener is passed through the first mounting hole 1312 and fixedly connected to the box body 110, so as to fix the first portion 131 to the box body 110 and reduce the difficulty of fixing the first portion 131 and the box body 110; accordingly, in combination with Figure 7 、 Figure 8 and Figure 10 As shown, at least one second mounting hole 1324 is provided on the second part 132, and the second fastener is passed through the second mounting hole 1324 and fixedly connected to the door body 120 to fix the second part 132 to the door body 120 and reduce the difficulty of fixing the second part 132 and the door body 120.

[0118] Optionally, the first fastener and the second fastener are both formed as fastening bolts or fastening screws, etc.

[0119] In some embodiments, the first portion 131 and the second portion 132 can be rotatably matched to achieve rotatable matching of the door body 120 and the box body 110 , so that the door body 120 can rotate relative to the box body 110 .

[0120] In some embodiments, combined Figures 12-18As shown, one of the first part 131 and the second part 132 is provided with a socket 1311 extending in the vertical direction and the other is provided with a matching shaft 1321, and the matching shaft 1321 is separably plugged into the socket 1311. This means that when the first part 131 is provided with the socket 1311 extending in the vertical direction, the second part 132 is provided with the matching shaft 1321; or when the second part 132 is provided with the socket 1311 extending in the vertical direction, the first part 131 is provided with the matching shaft 1321, and the matching shaft 1321 is detachably engaged with the socket 1311 and the two are directly separable, thereby achieving the plug-in fit of the first part 131 and the second part 132, so as to facilitate the detachable fit of the door body 120 and the box body 110 using the connecting assembly 130, thereby reducing the difficulty of fitting the door body 120 and the box body 110.

[0121] In a specific example, the mating shaft 1321 can be plugged into the insertion hole 1311 to achieve plug-in fit between the mating shaft 1321 and the insertion hole 1311 .

[0122] Optionally, combined Figures 12-18 As shown, the first part 131 is provided with a socket 1311 extending in the vertical direction, and the second part 132 is provided with a matching shaft 1321. The matching shaft 1321 is separably plugged into the socket 1311 to facilitate the detachable matching of the door body 120 and the box body 110 using the connecting component 130.

[0123] It is worth noting that the present application sets the jack 1311 to extend in the vertical direction (the vertical direction can be understood as Figure 3 ), so that during the process of plugging and mating the mating shaft 1321 with the socket 1311, the door body 120 and the box body 110 can be detachably mated in the vertical direction. Compared with realizing the detachable mating of the door body 120 and the box body 110 in the horizontal direction, the difficulty of mating the door body 120 and the box body 110 can be reduced.

[0124] At the same time, by setting the socket 1311 to extend in the vertical direction, it is also convenient to utilize the action of gravity to limit the mutual position of the mating shaft 1321 and the socket 1311, thereby improving the relative position stability of the mating shaft 1321 and the socket 1311, and thus making the structural stability of the connecting component 130, so as to facilitate the use of the connecting component 130 to achieve stable matching of the door body 120 and the box body 110.

[0125] Specifically, through the above-mentioned arrangement, during the assembly process of the energy storage device 100, when it is necessary to install, disassemble or maintain the battery cell assembly 200, the door body 120 can be first hoisted by a hoisting machine to drive the door body 120 to move upward, so that the matching shaft 1321 is disengaged from the socket 1311, thereby achieving the purpose of disassembling the door body 120; when the assembly of the battery cell assembly 200 and other devices is completed, the door body 120 is hoisted by a hoisting machine to plug and engage the matching shaft 1321 with the socket 1311, thereby realizing the mating connection between the door body 120 and the box body 110, saving the time required for opening and closing the door body 120 in different processes, and improving the assembly efficiency of the energy storage device 100.

[0126] In a specific embodiment, combined with Figure 3 、 Figures 6-11 As shown, the connecting component 130 is formed as a detachable hinge that can be moved up and down. The detachable hinge is composed of two engageable hinges (a first part 131 and a second part 132). The length of the first part 131 and the second part 132 are 60 cm, the width is 20 cm, and the thickness is 4 cm.

[0127] It should be noted that the above dimensions are only for illustration. In a specific example, the above dimensions can be planned according to the actual dimensions of the door body 120 and the box body 110 .

[0128] In some embodiments, combined Figure 3-Figure 6 As shown, the energy storage device 100 also includes a locking member 150, which is provided with a first locking portion 151 and a second locking portion 152. One of the first locking portion 151 and the second locking portion 152 is fixedly matched with the door body 120, and the other is fixedly matched with the box body 110, so that the locking member 150 is used to realize the locking match between the door body 120 and the box body 110, so that the door body 120 can stably seal the placement port, thereby improving the structural stability of the energy storage device 100.

[0129] That is to say, the door body 120 and the box body 110 of the present application not only use the connecting assembly 130 to achieve detachable cooperation between the two, but also use the locking member 150 to achieve locking cooperation between the two, so that the relative position of the door body 120 and the box body 110 is stable.

[0130] In a specific example, after the box body 110 and the door body 120 are fixedly matched with the matching shaft 1321 and the socket 1311, the locking member 150 is used to lock the box body 110 and the door body 120 to achieve stable sealing of the placement opening using the door body 120.

[0131] Optionally, combined Figure 3 and Figure 4As shown, a matching portion 111 is provided on the box body 110 , and the first locking portion 151 is fixedly matched in the matching portion 111 to achieve fixed matching between the first locking portion 151 and the box body 110 .

[0132] Optionally, combined Figure 3 and Figure 4 As shown, the locking member 150 extends in the vertical direction and is arranged on one side of the door body 120. The first locking portion 151 is provided at both ends of the locking member 150 in the vertical direction, so that both ends of the locking member 150 in the vertical direction can be fixedly matched with the box body 110 at the same time, so that the locking member 150 can stably limit the position of the door body 120 and lock the door body 120.

[0133] The second locking portion 152 and the door body 120 may be fixedly matched with each other in any connection manner (such as a bolt connection or a snap connection, etc.), and no specific limitation is imposed here.

[0134] In some embodiments, as Figure 3 and Figure 6 As shown, in the vertical direction, the door body 120 is detachably coupled to the box body 110 via multiple connecting assemblies 130. The multiple connecting assemblies 130 can increase the coupling strength between the door body 120 and the box body 110, thereby stabilizing the relative position of the door body 120 and the box body 110, thereby improving the structural stability of the energy storage device 100.

[0135] In some embodiments, combined Figure 7 and Figure 14 As shown, the insertion hole 1311 is defined by the partial winding of the first portion 131. This reduces the difficulty of forming the insertion hole 1311 and avoids opening a hole on the first portion 131 to form the insertion hole 1311, thereby ensuring the structural strength of the first portion 131 to a certain extent and improving the working performance of the first portion 131.

[0136] In some embodiments, combined Figure 15 、 Figure 16 and Figure 21 As shown, the energy storage device 100 further includes an explosion-proof region 140 , which is configured to break when the pressure in the accommodating chamber reaches a set condition to release the pressure in the accommodating chamber, thereby providing a directional explosion relief function and improving the safety and reliability of the energy storage device 100 .

[0137] In some embodiments, combined Figure 15 、 Figure 16 and Figure 21As shown, the explosion-proof area 140 is provided on the connecting assembly 130. The integrated arrangement of the explosion-proof area 140 and the connecting assembly 130 not only improves the safety and reliability of the energy storage device 100, but also avoids the need for explosion-proof windows, simplifies the structure of the energy storage device 100, and reduces the manufacturing cost of the energy storage device 100.

[0138] That is to say, the connection assembly 130 of the present application is formed into a two-in-one structure of connection and pressure relief.

[0139] In some embodiments, combined Figure 15 、 Figure 16 and Figure 21 As shown, the connecting assembly 130 includes a first part 131 and a second part 132. The first part 131 is fixed to the box body 110, and the second part 132 is fixed to the door body 120. One of the first part 131 and the second part 132 is provided with a socket 1311 and the other is provided with a matching shaft 1321. The matching shaft 1321 and / or the side wall of the socket 1311 are provided with a notch 141 to define the explosion-proof area 140. Here, it means that the matching shaft 1321 is provided with a notch 141 to define the explosion-proof area 140 (combined with Figure 15 、 Figure 16 and Figure 17 Or, the side wall of the socket 1311 is provided with a notch 141 to define an explosion-proof area 140 (as shown); Figure 21 Alternatively, notches 141 are provided on the sidewalls of the mating shaft 1321 and the insertion hole 1311 to define an explosion-proof area 140, thereby enabling the explosion-proof area 140 to be provided in the connecting assembly 130, so that the connecting assembly 130 forms a two-in-one connection and pressure relief structure, thereby improving the safety and reliability of the energy storage device 100, simplifying the structure of the energy storage device 100, and reducing the manufacturing cost of the energy storage device 100.

[0140] At the same time, by providing the notches 141 to define the explosion-proof area 140 , the difficulty of forming the explosion-proof area 140 can be reduced.

[0141] It should be noted that the notch 141 mentioned here can be understood as a groove of a certain depth processed on the side wall of the mating shaft 1321 and / or the socket 1311, and the notch 141 is formed at the groove. Due to the setting of the groove, the thickness of the side wall of the mating shaft 1321 and / or the socket 1311 is reduced. When the pressure in the box body 110 increases to a certain level, the notch 141 automatically breaks and becomes a pressure release point, playing a role in directional explosion relief.

[0142] In addition, when the side wall of the insertion hole 1311 is provided with a notch 141 to define the explosion-proof area 140, as shown in FIG. Figure 19 and Figure 20As shown, the notch 141 may not be provided on the mating shaft 1321 to increase the structural strength of the mating shaft 1321 and ensure the performance of the mating shaft 1321 to a certain extent.

[0143] In some embodiments, as Figure 15 As shown, the other of the first part 131 and the second part 132 includes a main body 1322 and a protrusion 1323, the main body 1322 is fixed to the door body 120 or the box body 110, the protrusion 1323 is arranged on one side of the main body 1322, the matching shaft 1321 is arranged on the protrusion 1323, and the protrusion 1323 is suitable for stopping at the end face of the socket 1311. What is meant here is that the first part 131 or the second part 132 provided on the matching shaft 1321 includes a main body 1322 and a protrusion 1323. The main body 1322 is fixed to the door body 120 or the box body 110 to achieve fixed matching between the first part 131 and the door body 120 or the second part 132 and the box body 110. Since the protrusion 1323 is provided on one side of the main body 1322, when the matching shaft 1321 is provided on the protrusion 1323, the matching shaft 1321 can be provided on the first part 131 or the second part 132, so as to facilitate the matching of the first part 131 and the second part 132 by utilizing the matching shaft 1321 and the socket 1311.

[0144] At the same time, by setting the protrusion 1323 to abut against the end face of the socket 1311, the abutment fit of the first part 131 and the second part 132 is achieved, which facilitates the use of gravity to limit the first part 131 and the second part 132 to each other, thereby improving the relative position stability of the first part 131 and the second part 132, and thereby making the structural stability of the connecting component 130, so as to facilitate the use of the connecting component 130 to achieve stable fit between the door body 120 and the box body 110.

[0145] In some embodiments, combined Figure 15 、 Figure 16 and Figure 17 As shown, the portion of the mating shaft 1321 near the protrusion 1323 is provided with a notch 141. This means that when the mating shaft 1321 is provided with the notch 141, the notch 141 is provided near the protrusion 1323 to prevent, to a certain extent, the notch 141 from being inserted into the insertion hole 1311 after the mating shaft 1321 is plugged into the insertion hole 1311. This prevents, to a certain extent, the sidewall of the insertion hole 1311 from obstructing the notch 141, thereby facilitating the mating communication between the notch 141 and the accommodating cavity. This allows the notch 141 to automatically break when the pressure within the housing 110 increases to a certain level, thereby improving the safety and reliability of the energy storage device 100.

[0146] In some embodiments, as Figure 21As shown, the sidewall of the insertion hole 1311 is provided with a plurality of notches 141 extending along its axial direction to define the explosion-proof area 140. This means that when the sidewall of the insertion hole 1311 is provided with notches 141, the notches 141 on the sidewall of the insertion hole 1311 may include a plurality of notches 141, and each of the plurality of notches 141 extends along the axial direction of the insertion hole 1311, thereby increasing the extension length of the notches 141 and thus increasing the area of ​​the notches 141, thereby facilitating pressure relief through the notches 141 and improving the safety and reliability of the energy storage device 100.

[0147] In a specific example, when the gas in the box body 110 reaches a certain pressure, the notch 141 is destroyed and the door body 120 automatically pops open to achieve the purpose of pressure relief. However, since the door body 120 and the box body 110 are also locked together by the locking member 150, the door body 120 will not be popped out, thereby improving the safety of the energy storage device 100.

[0148] In some embodiments, the battery cell assemblies 200 are arranged in multiple groups, each group of battery cell assemblies 200 including multiple battery cells 220, and the multiple groups of battery cell assemblies 200 are arranged at intervals. This means that the multiple groups of battery cell assemblies 200 are arranged at intervals within the housing 110. When the housing 110 is formed as a container, the multiple groups of battery cells 220 can be used to improve transportation efficiency. When the housing 110 is formed as the outer shell of the energy storage device 100, the multiple groups of battery cells 220 can be used to increase the capacity of the energy storage device 100, thereby improving the energy storage performance of the energy storage device 100.

[0149] In some embodiments, the housing 110 is provided with a plurality of placement openings, each corresponding to a plurality of battery cell assemblies 200. This allows each battery cell assembly 200 to be placed in the receiving cavity through a corresponding placement opening, thereby reducing the difficulty of assembling the plurality of battery cell assemblies 200.

[0150] In some embodiments, each placement opening is opened or closed by a detachable door 120. That is, each placement opening is provided with a corresponding detachable door 120, which, to a certain extent, prevents the battery cell assembly 200 in the accommodating cavity from being removed through the placement opening, thereby achieving the purpose of supporting the battery cell assembly 200, and also, to a certain extent, prevents foreign matter, dust, water stains, etc. from entering the accommodating cavity through the placement opening, thereby achieving the purpose of protecting the battery cell assembly 200.

[0151] At the same time, by providing a detachable door body 120 corresponding to each placement port, it is also possible to provide multiple explosion-proof areas 140 on the energy storage device 100, and each explosion-proof area 140 is arranged opposite a battery cell assembly 200, so that when the battery cell assembly 200 produces gas, it can be discharged through the corresponding placement port, which is beneficial to shorten the exhaust and pressure relief path and further improve the safety of the energy storage device 100.

[0152] The energy storage system 300 according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0153] like Figure 1 As shown, the energy storage system 300 of the embodiment of the present application includes: a power conversion device (not shown in the figure) and an energy storage device 100.

[0154] The energy storage device 100 is the aforementioned energy storage device 100 , and the specific structure of the energy storage device 100 is not described in detail herein. The power conversion device is used to electrically connect the power generation device and the energy storage device 100 .

[0155] Since the energy storage device 100 of the embodiment of the present application has the above technical effects, the energy storage system 300 of the embodiment of the present application also has the above technical effects, that is, by adopting the energy storage device 100 of the present application, the difficulty of assembling the energy storage system 300 can be reduced.

[0156] It is understandable that other components of the energy storage device 100 and the energy storage system 300 according to the embodiment of the present application are well known to those skilled in the art and will not be described in detail here.

[0157] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0158] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An energy storage device, characterized in that: include: A box body (110) and a door body (120), wherein a receiving cavity having a placement opening is provided in the box body (110), and the door body (120) is detachably provided on the box body (110) via a connecting assembly (130) to open or close the placement opening; A battery cell assembly (200), the battery cell assembly (200) comprising a plurality of battery cells (220), the battery cell assembly (200) being disposed in the accommodating cavity; An explosion-proof area (140) is provided in the connection assembly (130), and the explosion-proof area (140) is configured to break when the pressure in the accommodating chamber reaches a set condition to discharge the pressure in the accommodating chamber.

2. The energy storage device according to claim 1, characterized in that The door body (120) is rotatable relative to the box body (110) via the connecting assembly (130).

3. The energy storage device according to claim 2, characterized in that The connecting assembly (130) includes a first part (131) and a second part (132), wherein the first part (131) is fixed to the box body (110), and the second part (132) is fixed to the door body (120), and the first part (131) and the second part (132) are plug-fitted.

4. The energy storage device according to claim 3, characterized in that One of the first part (131) and the second part (132) is provided with a socket (1311) extending in a vertical direction and the other is provided with a matching shaft (1321), and the matching shaft (1321) is separably plug-fitted with the socket (1311).

5. The energy storage device according to claim 4, characterized in that In the vertical direction, the door body (120) is detachably matched with the box body (110) through a plurality of connecting components (130).

6. The energy storage device according to claim 4, characterized in that The insertion hole (1311) is defined by a partial winding of the first portion (131).

7. The energy storage device according to claim 1, characterized in that The connecting assembly (130) includes a first part (131) and a second part (132), wherein the first part (131) is fixed to the box body (110), and the second part (132) is fixed to the door body (120), one of the first part (131) and the second part (132) is provided with a socket (1311) and the other is provided with a matching shaft (1321), and the side wall of the matching shaft (1321) and / or the socket (1311) is provided with a notch (141) to define the explosion-proof area (140).

8. The energy storage device according to claim 7, characterized in that The other of the first part (131) and the second part (132) includes a main body (1322) and a protrusion (1323), wherein the main body (1322) is fixed to the door body (120) or the box body (110), and the protrusion (1323) is arranged on one side of the main body (1322), and the matching shaft (1321) is arranged on the protrusion (1323), and the protrusion (1323) is suitable for stopping at the end face of the socket (1311).

9. The energy storage device according to claim 8, characterized in that The portion of the mating shaft (1321) close to the protrusion (1323) is provided with the notch (141).

10. The energy storage device according to claim 7, characterized in that: The side wall of the insertion hole (1311) is provided with a plurality of notches (141) extending along its axial direction to define the explosion-proof area (140).

11. The energy storage device according to claim 1, characterized in that The battery cell assemblies (200) are in multiple groups, each group of the battery cells (220) includes a plurality of the battery cells (220), and the multiple groups of the battery cell assemblies (200) are arranged at intervals; The box (110) is provided with a plurality of placement openings, and the plurality of placement openings are provided in a one-to-one correspondence with the plurality of groups of battery monomer assemblies (200); Each placement opening is opened or closed by the detachable door body (120).

12. An energy storage system, characterized in that: It comprises a power conversion device and an energy storage device as described in any one of claims 1 to 11, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

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