Battery device, energy storage device, energy storage system, and charging network

Abstract

Provided in the present application are a battery device (100), an energy storage device (1000), an energy storage system (2000), and a charging network (3000). The battery device (100) comprises a plurality of battery cells (20) that are arranged to form at least one battery cell assembly (110), wherein end plates (50) are provided at both opposite ends of the battery cell assembly (110) in the direction of length (X); binding members (30) surround the peripheral side wall of the battery cell assembly (110) in the direction of width (Y) and are attached to the end plates (50); and a reinforcing member (40) is provided at either end of the battery cell assembly (110) in the direction of height (Z), two opposite ends of the reinforcing member (40) in the direction of length (X) being attached to the end plates (50) respectively. In the battery device (100) provided in the embodiments of the present application, by means of the reinforcing member (40) and at least two binding members (30), the probability of the binding members (30) breaking can be effectively reduced.

Description

Battery devices, energy storage devices, energy storage systems and charging networks

[0001] This application claims priority to Chinese Patent Application No. 202411621070.9, filed on November 13, 2024, entitled “Battery Device, Energy Storage Device, Energy Storage System and Charging Network”, which is incorporated herein by reference in its entirety. Technical Field

[0002] This application relates to the field of battery structure technology, and in particular provides a battery device, an energy storage device, an energy storage system, and a charging network. Background Technology

[0003] With the development of new energy technologies, batteries are being used more and more widely, for example in energy storage devices and electrical appliances, such as energy storage cabinets, energy storage containers, mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0004] Battery devices typically consist of multiple individual battery cells, which are grouped together. These cells are usually secured with restraints and end plates to meet the expansion force requirements of the individual cells. However, the current technology using only restraints may pose a risk of the restraints breaking due to excessive expansion force on the individual cells, potentially leading to loosening or even damage to the battery cell assembly.

[0005] Application content

[0006] The purpose of this application is to provide a battery device, energy storage device, energy storage system, and charging network, aiming to solve the problem that in related technologies, the binding components of battery cells may not be able to meet the expansion force of the battery cells, resulting in loosening or damage.

[0007] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0008] In a first aspect, embodiments of this application provide a battery device, including a restraining member, a reinforcing member, and a plurality of battery cells. The plurality of battery cells are arranged to form at least one battery cell assembly. End plates are provided at both ends of the battery cell assembly along the length direction. At least two restraining members are sleeved on the battery cell assembly, the restraining members surrounding the peripheral sidewall of the battery cell assembly along the width direction and attached to each end plate. A reinforcing member is provided at any end of the battery cell assembly along the height direction, and the two ends of the reinforcing member along the length direction are respectively attached to the end plates.

[0009] The beneficial effects of the embodiments of this application are as follows: In the battery device provided by the embodiments of this application, after multiple battery cells are arranged to form a battery cell assembly, end plates are provided at both ends of the battery cell assembly along the length direction and are secured with at least two binding members. At the same time, a reinforcing member is used at any end of the battery cell assembly along the height direction to connect the end plates at the opposite ends. That is, the reinforcing member and at least two binding members work together on the end plates at both ends of the battery cell assembly along the length direction. The reinforcing member and at least two binding members can distribute the expansion force of the battery cells in the battery cell assembly, thereby effectively reducing the probability of the binding members breaking. As a result, the probability of the battery cell assembly losing its binding and becoming loose or damaged is also reduced.

[0010] In some embodiments, the reinforcement is located in the middle region of the battery cell in the width direction of the battery cell assembly.

[0011] By adopting the above technical solution, since the expansion of the battery cell is greater in the middle part of the battery cell, the reinforcing member located in the middle region of the battery cell in the width direction can achieve a better limiting and restraining effect on the battery cell assembly.

[0012] In some embodiments, the end plate includes an end plate body and an insert. The end plate body has a connection hole, and the insert has a fixing structure. The insert is inserted into the end plate body, and the connection hole communicates with the fixing structure.

[0013] By adopting the above technical solution, the reinforcing member can be connected to the fixing structure of the insert in the end plate body through the connecting hole, thereby achieving a stable connection between the reinforcing member and the end plate body.

[0014] In some embodiments, an adhesive layer is provided between the insert and the end plate body, and the insert is fixedly connected to the end plate body through the adhesive layer.

[0015] By adopting the above technical solution, the insert can be fixed in the end plate body by the adhesive layer, which can effectively reduce the probability of the insert falling off.

[0016] In some embodiments, the restraint is a steel strap.

[0017] By adopting the above technical solution, steel strips are used as binding components to connect and bind battery cells and end plates. The steel strips can provide greater restraint and are less prone to breakage.

[0018] In some embodiments, the dimension of the battery cell assembly along the length direction is L, where L > 1500 mm.

[0019] By adopting the above technical solution, the length dimension L of the battery cell assembly is set to be greater than 1500 mm, which results in higher assembly efficiency compared to battery cell assemblies with smaller length dimensions. At the same time, by using reinforcing members and at least two binding members to provide binding, the reliability of battery cell assemblies with larger length dimensions can be effectively improved.

[0020] In some embodiments, 1800mm≤L≤2200mm.

[0021] By adopting the above technical solution, the dimension L of the battery cell assembly along the length direction is set to be in the range of 1800 mm to 2200 mm, which not only improves the assembly efficiency of the battery cell assembly, but also enhances the reliability of the battery cell assembly by the combined action of the reinforcing member and at least two restraining members.

[0022] In some embodiments, a slot is provided at the end of the end plate facing away from the battery cell assembly, and a restraint member is fitted into the slot.

[0023] By adopting the above technical solution and using the slot-embedded restraint component, the influence of the restraint component on the size of the battery cell assembly in the length direction can be effectively reduced.

[0024] In some embodiments, the battery device further includes a housing, in which a battery cell assembly is housed, and the end of the battery cell assembly facing away from the reinforcing member along the height direction is connected to the housing.

[0025] By adopting the above technical solution, a reinforcing member is provided at one end of the battery cell assembly along the height direction, and the other end of the battery cell assembly along the height direction can be connected to the housing, so as to achieve the purpose of stably assembling the battery cell assembly into the housing.

[0026] In some embodiments, in the height direction of the battery cell assembly, the first of the at least two restraints is located in the upper half of the battery cell assembly, and the second of the at least two restraints is located in the lower half of the battery cell assembly.

[0027] By adopting the above technical solution, the first and second binding members of at least two binding members can be respectively fitted and bound to the upper and lower halves of the battery cell assembly, so that the binding and binding effect of the at least two binding members on the battery cell assembly is better.

[0028] In some embodiments, in the height direction of the battery cell assembly, a third restraint of at least two restraints is disposed between the first restraint and the second restraint.

[0029] By adopting the above technical solution, a third binding member can be used between the first and second binding members to further bind and restrain the battery cell assembly, thereby further increasing the binding force on the battery cell assembly and further reducing the probability of the binding member breaking.

[0030] Secondly, embodiments of this application also provide an energy storage device, including the battery device as described above, which is used to store or provide electrical energy.

[0031] The beneficial effects of the embodiments of this application are as follows: The energy storage device provided in the embodiments of this application includes the above-mentioned battery device. When the probability of the battery cell assembly of the above-mentioned battery device becoming loose or damaged is low, the probability of the energy storage device being damaged is also low.

[0032] In some embodiments, the energy storage device includes a cabinet, and the length direction of the battery cell assembly is the width direction of the cabinet.

[0033] By adopting the above technical solution, the length direction of the battery cell assembly is arranged along the width direction of the cabinet, which allows the battery cell assembly to be arranged more densely inside the cabinet, thereby improving the space utilization rate inside the cabinet.

[0034] Thirdly, embodiments of this application also provide an energy storage system, including a power conversion device and an energy storage device as described above, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0035] The beneficial effects of the embodiments of this application are as follows: The energy storage system provided in the embodiments of this application includes the above-mentioned energy storage device, thereby improving the stability of the energy storage system.

[0036] Fourthly, embodiments of this application also provide a charging network, including a charging pile and an energy storage device or energy storage system as described above, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0037] The beneficial effects of the embodiments of this application are as follows: The charging network provided by the embodiments of this application includes the above-mentioned energy storage device or energy storage system, thereby improving the stability of the charging network. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 is a schematic diagram of the energy storage device provided in an embodiment of this application;

[0040] Figure 2 is an exploded view of a battery device provided in some embodiments of this application;

[0041] Figure 3 is a schematic diagram of the structure of the first type of battery cell assembly provided in the embodiment of this application;

[0042] Figure 4 is a magnified view of part A in Figure 3;

[0043] Figure 5 is a schematic diagram of the structure of the second type of battery cell assembly provided in the embodiment of this application;

[0044] Figure 6 is a schematic diagram of the structure of the third type of battery cell assembly provided in the embodiment of this application;

[0045] Figure 7 is a schematic diagram of the structure of the fourth type of battery cell assembly provided in the embodiments of this application;

[0046] Figure 8 is a structural schematic diagram of the reinforcing member provided in an embodiment of this application;

[0047] Figure 9 is an exploded view of the end plate provided in an embodiment of this application;

[0048] Figure 10 is a schematic diagram of the energy storage system provided in an embodiment of this application;

[0049] Figure 11 is a schematic diagram of the charging network provided in an embodiment of this application.

[0050] The reference numerals in the figures are as follows: 1000, energy storage device; 1100, cabinet; 2000, energy storage system; 2100, power conversion device; 2200, power generation device; 3000, charging network; 3100, charging pile; 3110, connector; 100, battery device; 110, battery cell assembly; X, length direction; Y, width direction; Z, height direction; 110a, upper part; 110b, lower part; 10, enclosure; 20, battery cell; 21, outer shell; 22, electrode terminal; 23, explosion-proof valve; 30, restraint component; 40, reinforcing component; 41, flange structure; 50, end plate; 501, slot; 51, end plate body; 511, connection hole; 52, insert; 520, fixing structure; 521, mounting hole; 522, nut. Detailed Implementation

[0051] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0052] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0056] A battery typically consists of multiple individual cells arranged in a specific order. Since each individual cell usually contains a certain amount of gas, gas generation or absorption reactions occur in the electrolyte solution during charging or discharging. This gas generation leads to an increase in internal gas pressure within the cell, causing it to expand and deform. During charging and discharging, the positive and negative electrode materials undergo chemical reactions, forming new compounds. These reactions are accompanied by volume changes, resulting in volume changes within the cell's internal materials, which also contributes to expansion and deformation. Because individual cells expand and deform during use, and this expansion and deformation is particularly pronounced in the alignment direction, the battery assembly needs to be restrained to limit the expansion forces.

[0057] Currently, the common method for securing battery cells is to use binding devices to bundle the assembled battery cells. The specific operation involves arranging multiple battery cells into a group, maintaining a certain size under pressure from a pressurizing device, and then using binding devices in a ring shape to secure the entire battery cell assembly. However, this method of securing the battery cells with binding devices alone carries the risk of excessive expansion force from the battery cells causing the binding devices to break, which could lead to loosening or even damage to the battery cell assembly.

[0058] Based on the above considerations, in order to solve the problem that the binding members of the battery cell assembly may not be able to meet the expansion force of the battery cell, resulting in loosening or damage, a battery device is designed. After the battery cells of the battery cell assembly are arranged to form a battery cell assembly, end plates are set at both ends of the battery cell assembly along the length direction and are bound together with at least two binding members. At the same time, a reinforcing member is used at any end of the battery cell assembly along the height direction to connect the end plates at the opposite ends. By using the reinforcing member and at least two binding members to act on the end plates simultaneously and bind the battery cell assembly, the expansion force on a single binding member can be effectively reduced, thereby reducing the probability of the binding member breaking.

[0059] The battery cells disclosed in this application can be used in electrical devices that use battery devices as a power source or in various energy storage systems that use battery devices as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. Energy storage systems can be, but are not limited to, energy storage cabinets, energy storage containers, energy storage power stations, and integrated energy storage and charging units, etc.

[0060] Please refer to Figure 2, which is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 110 for providing voltage and capacity. The battery cell assembly 110 may include multiple battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0061] In some embodiments, the battery cell assembly 110 is typically formed by arranging a plurality of battery cells 20.

[0062] As an example, the battery cell assembly 110 can be a battery module, which is composed of multiple battery cells 20 arranged and fixed to form an independent module.

[0063] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more battery cell assemblies 110, the battery cell assemblies 110 being housed in the housing 10.

[0064] As an example, the battery cell assembly 110 can be a battery module, and the battery cell assembly 110 can be housed in the housing 10 by fixing the battery module in the housing 10.

[0065] As an example, the battery cell assembly 110 can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0066] As an example, the housing 10 may include a first housing 10 and a second housing 10. The first housing 10 and the second housing 10 are fastened together to form a closed space inside the housing 10 to house the battery cell assembly 110. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 10 may be a top cover or a bottom plate.

[0067] As an example, the housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 10 forms an enclosed space to house the battery cell assembly 110.

[0068] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 20, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0069] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after being discharged by recharging to activate the active materials.

[0070] The battery cell 20 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0071] According to some embodiments of this application, referring to Figures 2 to 7, this application provides a battery device 100, including a restraining member 30, a reinforcing member 40, and a plurality of battery cells 20. The plurality of battery cells 20 are arranged to form at least one battery cell assembly 110. The battery cell assembly 110 has end plates 50 at both opposite ends along the length direction X. At least two restraining members 30 are sleeved on the battery cell assembly 110. The restraining members 30 surround the peripheral sidewall of the battery cell assembly 110 along the width direction Y and are attached to each end plate 50. The battery cell assembly 110 has a reinforcing member 40 at any end along the height direction Z. The reinforcing members 40 are attached to the end plates 50 at their opposite ends along the length direction X.

[0072] Multiple battery cells 20 are arranged to form at least one battery cell assembly 110. Optionally, the multiple battery cells 20 can be arranged sequentially along one direction; or, the multiple battery cells 20 can be arranged sequentially along two mutually perpendicular directions. The aforementioned battery cells 20 can be prism battery cells 20, such as rectangular battery cells 20, square battery cells 20, etc.; or, the aforementioned battery cells 20 can also be cylindrical battery cells 20. The number of battery cell assemblies 110 can be any number of one, two, or more.

[0073] For example, in some embodiments, the battery cell 20 can be a rectangular battery cell 20, and multiple rectangular battery cells 20 can be arranged in one direction to form a battery cell assembly 110. During use, the battery cell 20 expands and deforms, and the expansion force of multiple battery cells 20 is superimposed along the arrangement direction, making the expansion and deformation of the battery cell assembly 110 along the arrangement direction more obvious. It should be understood that in this embodiment, the length direction X of the battery cell assembly 110 is the arrangement direction of the multiple battery cells 20.

[0074] Alternatively, in other embodiments, the battery cell 20 can be a square battery cell 20, and multiple square battery cells 20 can be arranged sequentially along two mutually perpendicular directions; some of the battery cells 20 are arranged side by side along the first arrangement direction to form a horizontal row, and other battery cells 20 are arranged along the second arrangement direction perpendicular to the first arrangement direction to form a vertical row, thereby forming a battery cell assembly 110. During use, the battery cells 20 expand and deform. The expansion force of multiple battery cells 20 arranged along the first arrangement direction is superimposed along the first arrangement direction, and the expansion force of multiple battery cells 20 arranged along the second arrangement direction is superimposed along the second arrangement direction, so that the expansion and deformation of the battery cell assembly 110 along the arrangement direction is more obvious, and the expansion and deformation of the direction with a larger arrangement length is more obvious than that of the other direction because more battery cells 20 are superimposed. It should be understood that in this embodiment, when the number of battery cells 20 arranged along the first arrangement direction is greater than the number of battery cells 20 arranged along the second arrangement direction, the first arrangement direction corresponds to the length direction X of the battery cell assembly 110; or, when the number of battery cells 20 arranged along the second arrangement direction is greater than the number of battery cells 20 arranged along the first arrangement direction, the second arrangement direction corresponds to the length direction X of the battery cell assembly 110.

[0075] Each battery cell assembly 110 has end plates 50 at both opposite ends along its length direction X; thus, there are at least two end plates 50. At least one end of the battery cell assembly 110 has an end plate 50, and at least one end of the opposite end also has an end plate 50. When either end of the battery cell assembly 110 has two or more end plates 50, the multiple end plates 50 are arranged sequentially along the length direction X of the battery cell assembly 110.

[0076] The restraining member 30 refers to a ring-shaped structure that is sleeved on the outer periphery of the battery cell assembly 110 and binds the end plate 50 to the battery cell assembly 110 to form an integral unit. The number of restraining members 30 can be any number of two, three, or more. In some embodiments, multiple restraining members 30 can be arranged sequentially along the height direction Z of the battery cell assembly 110 and bound to the battery cell assembly 110 and the end plate 50. The restraining member 30 can be, but is not limited to, steel cable ties, aluminum alloy cable ties, plastic cable ties, etc. For example, in some embodiments, all of the multiple restraining members 30 can be steel cable ties; or, in other embodiments, at least one of the multiple restraining members 30 can be a steel cable tie, and at least one of the multiple restraining members 30 can be a plastic cable tie.

[0077] The restraint member 30 surrounds the peripheral sidewall of the battery cell assembly 110 along the width direction Y and is attached to each end plate 50; thereby, the restraint member 30 is tied to the end plates 50 of the battery cell assembly 110 at opposite ends along the width direction Y and at opposite ends along the length direction X, and the restraint member 30 can tie the end plates 50 at both ends and the battery cell assembly 110 located between the end plates 50 at both ends into one unit.

[0078] Optionally, the connection method of the restraint member 30 to the end plate 50 includes, but is not limited to, the restraint member 30 being sleeved on the end plate 50, the restraint member 30 being fixedly connected to the outer surface of the end plate 50, the restraint member 30 being inserted and fixed inside the end plate 50, and the restraint member 30 being inserted between the end plate 50 and the battery cell 20.

[0079] Wherein, the width direction Y of the aforementioned battery cell assembly 110 refers to a direction perpendicular to the length direction X of the battery cell assembly 110; it should be understood that the width direction Y of the battery cell assembly 110 is consistent with the width direction Y of each battery cell 20.

[0080] The reinforcing member 40 refers to the reinforcing structure used to connect the end plates 50 at opposite ends of the battery cell assembly 110 along the length direction X; optionally, the reinforcing member 40 can be, but is not limited to, a pressure strip structure, a pressure bar structure, a rib structure, etc.; the material of the reinforcing member 40 can be, but is not limited to, steel, aluminum alloy, titanium alloy, injection molded material, etc. The number of reinforcing members 40 can be one, two, or more than one.

[0081] The reinforcing member 40 is attached to the end plate 50. Optionally, the connection method of attaching the reinforcing member 40 to the end plate 50 includes, but is not limited to, the reinforcing member 40 being sleeved on the end plate 50, the reinforcing member 40 being fixedly connected to the outer surface of the end plate 50, the reinforcing member 40 being inserted and fixed inside the end plate 50, and the reinforcing member 40 being inserted between the end plate 50 and the battery cell 20. For example, taking the reinforcing member 40 being fixedly connected to the outer surface of the end plate 50 as an example, the reinforcing member 40 can be connected to any point on the outer surface of the end plate 50, such as any point on the surface facing or away from the battery cell assembly 110; the reinforcing member 40 can form a stable connection with the end plate 50 by welding, fastener connection, etc. The end of the reinforcing member 40 can be bent to form a flange structure 41 for fixing in a way that forms a large surface contact with the surface of the end plate 50.

[0082] The reinforcing member 40 is disposed at any end of the battery cell assembly 110 along the height direction Z; optionally, the reinforcing member 40 may be disposed at any end of the battery cell assembly 110 along the height direction Z, as shown in Figures 3 and 5; or, the battery cell assembly 110 may be provided with reinforcing members 40 at opposite ends, as shown in Figure 6; or, the reinforcing member 40 may be wrapped around the peripheral sidewall of the battery cell assembly 110 along the height direction Z and sleeved and fixed on the end plate 50, as shown in Figure 7.

[0083] It should be understood that the reinforcing member 40 is disposed at any end of the battery cell assembly 110 along the height direction Z, while the restraining member 30 surrounds the opposite ends of the battery cell assembly 110 along the width direction Y; that is, the reinforcing member 40 and the restraining member 30 are located at different positions of the battery cell assembly 110, and the reinforcing member 40 and the restraining member 30 act simultaneously on the end plates 50 at both ends in the length direction X to provide restraining force; thus, the reinforcing member 40 and the restraining member 30 can form limiting constraints on the battery cell assembly 110 in different directions, and the stability of the battery cell assembly 110 is better.

[0084] Wherein, the height direction Z of the aforementioned battery cell assembly 110 refers to a direction perpendicular to the length direction X of the battery cell assembly 110; it should be understood that the length direction X, width direction Y and height direction Z of the battery cell assembly 110 are perpendicular to each other, and the height direction Z of the battery cell assembly 110 is consistent with the height direction Z of each battery cell 20.

[0085] The battery device 100 provided in this application embodiment has multiple battery cells 20 arranged to form a battery cell assembly 110. End plates 50 are provided at both ends of the battery cell assembly 110 in the length direction X and are secured with at least two binding members 30. At the same time, a reinforcing member 40 is used at any end of the battery cell assembly 110 in the height direction Z to connect the end plates 50 at the opposite ends. That is, the reinforcing member 40 and at least two binding members 30 work together on the end plates 50 at both ends of the battery cell assembly 110 in the length direction X. The reinforcing member 40 and at least two binding members 30 can distribute the expansion force of the battery cells 20 in the battery cell assembly 110, thereby effectively reducing the probability of the binding members 30 breaking. As a result, the probability of the battery cell assembly 110 losing its binding and becoming loose or damaged is also reduced.

[0086] Referring to Figures 3 and 4, in some embodiments, the reinforcement 40 is located in the middle region of the end plate 50 in the width direction Y of the battery cell assembly 110.

[0087] It should be understood that the battery cell 20 includes a housing 21 and electrode terminals 22 and an explosion-proof valve 23 disposed on the housing 21. The electrode terminals 22 are electrically connected to an external structure to input or output electrical energy, and the number of electrode terminals 22 can be one, two, or more; exemplaryly, in some embodiments, the battery cell 20 includes two electrode terminals 22, which are located on the same side of the battery cell 20 along the height direction Z and are spaced apart. The explosion-proof valve 23 is used to release internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold, and the explosion-proof valve 23 can be disposed at any location on the housing 21; exemplaryly, in some embodiments, the explosion-proof valve 23 can be disposed on one side of the housing 21 along the height direction Z, for example, the explosion-proof valve 23 can be disposed on the same side as the electrode terminals 22.

[0088] The aforementioned intermediate region refers to a portion of the battery cell assembly 110 in the width direction Y, including the explosion-proof valve 23, or the region between the two electrode terminals 22, or a portion of the region including either of the two electrode terminals 22.

[0089] Because the expansion of each battery cell 20 in the battery cell assembly 110 is cumulative along the length direction X; and because the expansion process of the battery cell 20 is such that the expansion amplitude of the middle part of the battery cell 20 along the length direction X of the battery cell assembly 110 is greater than that of the outer periphery, this arrangement places the reinforcing member 40 in the middle region along the width direction Y of the battery cell assembly 110. The reinforcing member 40 can directly constrain and provide binding force to the area of ​​the battery cell assembly 110 with a larger expansion amount, thereby improving the constraint effect of the reinforcing member 40 and the end plate 50 on the expansion force of the battery cell assembly 110.

[0090] Please refer to Figures 3, 4, 8 and 9. In some embodiments, the end plate 50 includes an end plate body 51 and an insert 52. The end plate body 51 has a connection hole 511, and the insert 52 has a fixing structure 520. The insert 52 is inserted into the end plate body 51, and the connection hole 511 is connected to the fixing structure 520.

[0091] Here, the end plate body 51 refers to the main body of the end plate 50. The end plate body 51 can be in the form of a plate, such as an extruded aluminum plate formed by extrusion through an extrusion die, or an alloy plate made by casting or rolling processes.

[0092] Insert 52 refers to the connecting component embedded in end plate 50. It should be understood that the insert 52 is provided with a fixing structure 520 for connecting and cooperating with fasteners. For example, the fixing structure 520 includes, but is not limited to, mounting holes, threaded holes, expansion holes, etc., formed on the insert 52.

[0093] The end plate body 51 may have receiving slots, receiving holes, or other receiving structures for inserting the insert 52; or, the end plate body 51 may accommodate the insert 52 based on its inherent hole structure. The connecting hole 511 on the end plate body 51 can connect to the receiving structure inside the end plate body 51, thereby, the reinforcing member 40 can be connected to the fixing structure 520 of the insert 52 inside by fasteners passing through the connecting hole 511.

[0094] For example, in some embodiments, the end plate body 51 can be an extruded aluminum plate formed by extrusion die using an extruder. Thus, according to the production process, the interior of the extruded aluminum plate forms a hollow structure that communicates with the outside in a direction perpendicular to the plate thickness. The insert 52 can be inserted from the outside into the interior of the extruded aluminum plate, with the fixing structure 520 on the insert 52 aligned with the connecting hole 511 on the end plate body 51. The fixing structure 520 on the insert 52 can be a mounting hole 521 on the insert 52, and a nut 522 fixedly disposed within the mounting hole 521, as shown in FIG9. In this way, the reinforcing member 40 can be connected to the surface of the end plate body 51, and fasteners such as bolts are sequentially passed through the connecting section, the connecting hole 511, and fixedly connected to the nut 522 to achieve the purpose of fixing the reinforcing member 40 to the end plate body 51. Thus, the reinforcing member 40 can connect the end plates 50 at both ends and, together with the end plates 50, constrain the battery cell assembly 110.

[0095] It should be understood that in other embodiments, the end plate 50 may also include only the end plate body 51. By opening threaded holes, expansion holes and other structures on the end plate body 51, the reinforcing member 40 can be directly fixedly connected to the end plate body 51 by fasteners such as bolts and expansion screws, so as to realize the fixed assembly between the reinforcing member 40 and the end plate 50.

[0096] Referring to Figure 9, in some embodiments, an adhesive layer (not shown in the figure) is provided between the insert 52 and the end plate body 51, and the insert 52 is fixedly connected to the end plate body 51 through the adhesive layer.

[0097] Understandably, an adhesive layer refers to a layered structure that provides adhesive properties.

[0098] Optionally, the adhesive layer can be applied to the interior of the end plate body 51, and when the insert 52 is inserted into the interior of the end plate body 51, the adhesive layer located inside can help fix the insert 52; or, the adhesive layer can be applied to the insert 52, and when the insert 52 is inserted into the interior of the end plate body 51, the adhesive layer on the insert 52 can help bond and fix it to the interior of the end plate body 51; or, the adhesive layer can be applied to both the interior of the end plate body 51 and the insert 52.

[0099] With this configuration, the insert 52 can be fixed inside the end plate body 51 by the adhesive layer, which can effectively reduce the probability of the insert 52 falling off.

[0100] Please refer to Figures 3 and 4. In some embodiments, the restraint 30 is a steel strip.

[0101] Understandably, the steel strip has better tensile strength due to the characteristics of its steel material. Therefore, the steel strip, together with the reinforcing member 40, can form a better binding effect on the battery cell assembly 110.

[0102] Optionally, the number of steel strips can be any number of two, three, or more; multiple steel strips can be simultaneously fitted onto the outer surfaces of the battery cell assembly 110 and the end plate 50.

[0103] With this setup, steel straps are used as binding elements 30 to connect and bind the battery cell assembly 110 and the end plate 50. The steel straps can provide greater restraint and are less prone to breakage.

[0104] Referring to Figures 3 and 4, in some embodiments, the dimension of the battery cell assembly 110 along the length direction X is L, where L > 1500 mm.

[0105] Specifically, the dimension L of the battery cell assembly 110 along the length direction X refers to the distance between the side surface of the end plate 50 disposed at one end of the battery cell assembly 110 facing away from the battery cell assembly 110 and the side surface of the end plate 50 disposed at the other end of the battery cell assembly 110 facing away from the battery cell assembly 110.

[0106] The dimension L of the battery cell assembly 110 along the length direction X is set to be greater than 1500 mm; optionally, L may be, but is not limited to, 1550 mm, 1600 mm, 1650 mm, 1700 mm, 1750 mm, 1800 mm, 1850 mm, 1900 mm, 1950 mm, 2000 mm, 2050 mm, 2100 mm, 2150 mm, 2200 mm, 2250 mm, 2300 mm, 2350 mm, 2400 mm, 2450 mm, 2500 mm, 2550 mm, etc.

[0107] It should be understood that setting the dimension L of the battery cell assembly 110 along the length direction X to be greater than 1500 mm means that, compared to a shorter battery cell assembly 110, a shorter battery cell assembly 110 requires two or more units to be arranged along the length direction X to meet the length requirement. However, more battery cell assemblies 110 will result in a greater number of end plates 50 along the length direction X. That is, the shorter battery cell assembly 110 has a lower grouping efficiency, while the longer battery cell assembly 110 has a higher grouping efficiency, and can also save on the use of materials.

[0108] With this configuration, the size L of the battery cell assembly 110 along the length direction X is set to be greater than 1500 mm, which results in higher assembly efficiency compared to battery cell assemblies 110 with smaller size along the length direction X. At the same time, by using the reinforcing member 40 and at least two binding members 30 together to provide binding, the reliability of the battery cell assembly 110 with larger size along the length direction X can be effectively improved.

[0109] Please refer to Figure 3. In some embodiments, 1800mm≤L≤2200mm.

[0110] Optionally, L can be, but is not limited to, 1800mm, 1830mm, 1850mm, 1880mm, 1900mm, 1930mm, 1950mm, 1980mm, 2000mm, 2030mm, 2050mm, 2080mm, 2100mm, 2130mm, 2150mm, 2180mm, 2200mm, etc.

[0111] With this configuration, the dimension L of the battery cell assembly 110 along the length direction X is set to be in the range of 1800 mm to 2200 mm, which not only improves the assembly efficiency of the battery cell assembly 110, but also enhances the reliability of the battery cell assembly 110 by having the reinforcing member 40 and at least two restraining members 30 work together.

[0112] Referring to Figures 3, 4 and 9, in some embodiments, the end plate 50 has a slot 501 at the end facing away from the battery cell assembly 110, and the restraint member 30 is embedded in the slot 501.

[0113] Understandably, when the restraint member 30 is sleeved on the end plate 50, the restraint member 30 can be accommodated within the slot 501; for example, the thickness of the restraint member 30 is greater than the depth of the slot 501, and a portion of the restraint member 30 can be accommodated within the slot 501; or, the thickness of the restraint member 30 is less than the depth of the slot 501, and the restraint member 30 can be completely accommodated within the slot 501. Thus, the restraint member 30 has a lower impact on the overall size in the length direction X.

[0114] Optionally, a larger slot 501 can be provided on the end plate 50 so that multiple restraint members 30 can be accommodated in the slot 501; or, multiple slots 501 can be provided on the end plate 50 along the height direction Z of the battery cell assembly 110 so that multiple restraint members 30 can be accommodated in the corresponding slots 501.

[0115] It should be understood that in some embodiments, when the end plate 50 includes the end plate body 51, the slot 501 is formed on the end plate body 51.

[0116] With this configuration, the restraint member 30 can be installed in the slot 501, which can effectively reduce the impact of the restraint member 30 on the dimensions of the battery cell assembly 110 in the length direction X.

[0117] Referring to Figures 2 to 4, in some embodiments, the battery device 100 further includes a housing 10, a battery cell assembly 110 is housed in the housing 10, and the end of the battery cell assembly 110 facing away from the reinforcing member 40 along the height direction Z is connected to the housing 10.

[0118] Optionally, the battery cell assembly 110 can be connected to the housing 10 by means of bonding, fastener connection or other methods to improve the stability of the battery cell assembly 110 housed in the housing 10.

[0119] The length direction X of the battery cell assembly 110 can be arranged along any direction of the housing 10; for example, the length direction X of the battery cell assembly 110 can be arranged along the length direction of the housing 10; or, the length direction X of the battery cell assembly 110 can be arranged along the width direction of the housing 10.

[0120] It should be understood that when the battery cell assembly 110 is connected to the housing 10, the end of the battery cell assembly 110 connected to the housing 10 can be constrained by the fixed connection with the housing 10, meaning that the degree of expansion and deformation of the end of the battery cell assembly 110 connected to the housing 10 is relatively small. Simultaneously, in the height direction Z, a reinforcing member 40 is provided at the end of the battery cell assembly 110 facing away from the housing 10, and the reinforcing member 40 constrains the battery cell assembly 110, thus also reducing the degree of expansion and deformation at the end of the battery cell assembly 110 with the reinforcing member 40. In this way, the degree of expansion and deformation of the battery cell 20 is effectively constrained and reduced.

[0121] With this configuration, a reinforcing member 40 is provided at one end of the battery cell assembly 110 along the height direction Z, and the other end of the battery cell assembly 110 along the height direction Z can be connected to the housing 10, so as to achieve the purpose of stably assembling the battery cell assembly 110 inside the housing 10; at the same time, the two opposite ends of the battery cell assembly 110 along the height direction Z are constrained by the reinforcing member 40 and by the constraint formed by the connection with the housing 10, which can effectively form a better constraint effect on the expansion force of the battery cell assembly 110.

[0122] Referring to Figures 3 and 4, in some embodiments, in the height direction Z of the battery cell assembly 110, the first of at least two restraint members 30 is disposed in the upper half 110a of the battery cell assembly 110, and the second of at least two restraint members 30 is disposed in the lower half 110b of the battery cell assembly 110.

[0123] It should be understood that the upper half 110a of the battery cell assembly 110 refers to the area of ​​the upper half 110a in the height direction Z of the battery cell assembly 110; the lower half 110b of the battery cell assembly 110 refers to the area of ​​the lower half 110b in the height direction Z of the battery cell assembly 110.

[0124] By providing restraint members 30 on the upper half 110a and lower half 110b of the battery cell assembly 110, the restraint members 30 can form limiting restraint on both the upper half 110a and lower half 110b of the battery cell assembly 110, which can effectively improve the uniformity of the distribution of the restraining force applied to the battery cell assembly 110 by the multiple restraint members 30, and thus improve the restraint effect of the multiple restraint members 30 on the expansion force of the battery cell assembly 110.

[0125] Optionally, when the number of restraints 30 is greater than two, the number of restraints 30 fitted on the upper half 110a and / or the lower half 110b can be two or more.

[0126] With this configuration, the first and second restraint members 30 of at least two restraint members 30 can be respectively fitted and bound to the upper half 110a and lower half 110b of the battery cell assembly 110, so that the binding and restraining effect of the at least two restraint members 30 on the battery cell assembly 110 is better.

[0127] Referring to Figures 3 and 4, in some embodiments, in the height direction Z of the battery cell assembly 110, a third restraint 30 (not shown in the figure) of at least two restraints 30 is disposed between the first restraint 30 and the second restraint 30.

[0128] Understandably, when the number of restraints is three or more, the first restraint 30 and the second restraint 30 can be respectively fitted onto the upper half 110a and the lower half 110b of the battery cell assembly 110 along the height direction Z. At the same time, the third restraint 30 can also be fitted onto the battery cell assembly 110 and located between the first restraint 30 and the second restraint 30. In this way, the first restraint 30, the second restraint 30 and the third restraint 30 can respectively restrain the battery cell assembly 110 at different heights, which can effectively improve the restraint effect on the battery cell assembly 110 and further reduce the degree of expansion and deformation of the battery cell assembly 110.

[0129] Optionally, the third restraint member 30 may be located at the center between the first restraint member 30 and the second restraint member 30, that is, the distance between the third restraint member 30 and the first restraint member 30 is equal to the distance between the third restraint member 30 and the second restraint member 30; or, the third restraint member 30 may be located close to the first restraint member 30; or, the third restraint member 30 may also be located close to the second restraint member 30.

[0130] It should be understood that in some embodiments, at least two restraining members 30 may also include a fourth restraining member 30, a fifth restraining member 30, etc., and these restraining members 30 may be respectively fitted onto different height positions along the height direction Z of the battery cell assembly 110 to jointly restrain the battery cell assembly 110. In this way, the expansion force on each restraining member 30 is effectively reduced, and the probability of each restraining member 30 breaking is also effectively reduced.

[0131] With this configuration, a third restraint member 30 can be used between the first restraint member 30 and the second restraint member 30 to further bind and restrain the battery cell assembly 110, thereby further increasing the restraint force on the battery cell assembly 110 and further reducing the probability of the restraint member 30 breaking.

[0132] The battery device 100 provided in this application will now be further described according to specific embodiments.

[0133] Referring to Figures 2 to 9, in this embodiment, the battery device 100 includes a housing 10, restraint members 30, reinforcing members 40, and multiple battery cells 20. The multiple battery cells 20 can be arranged sequentially in one direction to form at least one battery cell assembly 110. Each end of the battery cell assembly 110 along its length direction X is provided with an end plate 50. Two restraint members 30 are fitted onto the battery cell assembly 110; in this embodiment, both restraint members 30 are made of steel strips, which respectively wrap around the peripheral sidewalls of the battery cell assembly 110 along its width direction Y and are fitted onto the end plates 50 at both ends. One end of the battery cell assembly 110 along its height direction Z is connected to the housing 10, and the other end of the battery cell assembly 110 along its height direction Z is provided with a reinforcing member 40; in this embodiment, the reinforcing member 40 can be made of steel pressure strip. The steel pressure strip can be bent at both ends to form a flange structure 41. The flange structure 41 abuts against the side surface of the end plate 50 facing away from the battery cell assembly 110, and the flange structure 41 is locked to the end plate 50 by fasteners.

[0134] The dimension L of the battery cell assembly 110 along the length direction X can be set to be greater than 1500mm, for example, it can be set to the range of 1800mm to 2200mm. A slot 501 can be formed on the end plate 50, and the restraining member 30 can be embedded in the slot 501 to reduce the impact on the dimension of the battery cell assembly 110 along the length direction X.

[0135] Referring to Figures 1 and 2, this application embodiment also provides an energy storage device 1000, including the battery device 100 as described above, the battery device 100 being used to store or provide electrical energy.

[0136] This application provides an energy storage device 1000, including one or more battery clusters to increase the voltage and capacity of the energy storage device 1000. The battery clusters may include multiple battery devices 100, which are connected in series via a busbar to increase the voltage of the energy storage device 1000. When the energy storage device 1000 includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device 1000.

[0137] The energy storage device 1000 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device 1000 can store electrical energy as needed and output it when appropriate. For example, the energy storage device 1000 can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires the energy storage device 1000.

[0138] In some embodiments, the energy storage device 1000 is an energy storage container or an energy storage cabinet.

[0139] In some embodiments, the energy storage device 1000 may include a cabinet 1100 and one or more battery clusters, the battery clusters being housed in the cabinet 1100.

[0140] In some embodiments, the energy storage device 1000 may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0141] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 100 via piping to regulate the temperature of the individual battery cells 20.

[0142] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0143] As an example, the central control module can serve as the battery management unit of the energy storage device 1000, used for monitoring and managing the energy storage device 1000. The central control module can monitor information such as the current, voltage, power, state of charge, or temperature of the energy storage device 1000. For example, it can control the charging and discharging current and voltage of the energy storage device 1000. As an example, the central control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0144] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0145] As an example, the power distribution module can be used to distribute power to the modules in the energy storage device 1000 that require electricity.

[0146] The energy storage device 1000 provided in this application embodiment includes the aforementioned battery device 100. When the probability of the battery cell assembly 110 of the aforementioned battery device 100 becoming loose or damaged is low, the probability of the energy storage device 1000 being damaged is also low.

[0147] Referring to Figures 1 and 2, in some embodiments, the energy storage device 1000 includes a cabinet 1100, and the length direction X of the battery cell assembly 110 is the width direction of the cabinet 1100.

[0148] With this arrangement, the length direction X of the battery cell assembly 110 is arranged along the width direction of the cabinet 1100, which allows the battery cell assembly 110 to be arranged more densely within the cabinet 1100, thereby improving the space utilization rate within the cabinet 1100.

[0149] It should be understood that in other embodiments, the length direction X of the battery cell assembly 110 can also be arranged along the depth direction or height direction of the cabinet 1100 to meet different assembly requirements.

[0150] Referring to Figures 1 and 10, this application embodiment also provides an energy storage system 2000, including a power conversion device 2100 and an energy storage device 1000 as described above. The power conversion device 2100 is used to electrically connect the power generation device 2200 and the energy storage device 1000.

[0151] In some embodiments, the energy storage system 2000 may include one or more energy storage devices 1000 and a power conversion device 2100, wherein the power conversion device 2100 is connected between the power generation device 2200 and the energy storage device 1000. The power generation device 2200 generates electrical energy, which can be stored in the energy storage device 1000 via the power conversion device 2100. As an example, the power generation device 2200 may specifically be a solar panel, a hydroelectric power generation device 2200, a thermal power generation device 2200, a wind power generation device 2200, etc. The specific type of the power generation device 2200 is not limited in this application.

[0152] The energy storage system 2000 provided in this application embodiment includes the above-mentioned energy storage device 1000, thereby improving the stability of the energy storage system 2000.

[0153] Referring to Figures 1, 10, and 11, this application embodiment also provides a charging network 3000, including a charging pile and an energy storage device 1000 or an energy storage system 2000 as described above. The energy storage device 1000 is used to provide electrical energy to the charging pile.

[0154] This application provides a charging network 3000, including a charging pile 3100 and an energy storage device 1000. The charging pile 3100 is electrically connected to the energy storage device 1000, which provides electrical energy to the charging pile 3100. The charging pile 3100 is electrically connected to a battery device 100 in the energy storage device 1000 via a cable, and the battery device 100 can provide its stored electrical energy to the charging pile 3100. The charging pile 3100 has one or more connectors 3110 for connecting to an electrical device (such as a vehicle), thereby providing power to the electrical device.

[0155] The energy storage device 1000 can be located inside the charging pile 3100 (e.g., an integrated energy storage and charging unit) or outside the charging pile 3100.

[0156] The charging network 3000 provided in this application embodiment includes the above-mentioned energy storage device 1000 or energy storage system 2000, thereby improving the stability of the charging network 3000.

[0157] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that: include Multiple battery cells are arranged to form at least one battery cell assembly, and end plates are provided at both ends of the battery cell assembly along the length direction. The battery cell assembly is provided with at least two restraints, which surround the peripheral sidewall of the battery cell assembly along the width direction and are attached to each of the end plates. as well as A reinforcing member is provided at any end of the battery cell assembly along the height direction, and the two opposite ends of the reinforcing member along the length direction are respectively attached to the end plate.

2. The battery device according to claim 1, characterized in that: In the width direction of the battery cell assembly, the reinforcing member is located in the middle region of the battery cell.

3. The battery device according to claim 2, characterized in that: The end plate includes an end plate body and an insert. The end plate body has a connection hole, and the insert has a fixing structure. The insert is inserted into the end plate body, and the connection hole communicates with the fixing structure.

4. The battery device according to claim 3, characterized in that: An adhesive layer is provided between the insert and the end plate body, and the insert is fixedly connected to the end plate body through the adhesive layer.

5. The battery device according to any one of claims 1 to 4, characterized in that: The restraint component is a steel strap.

6. The battery device according to any one of claims 1 to 5, characterized in that: The dimension of the battery cell assembly along its length is L, where L > 1500 mm.

7. The battery device according to claim 6, characterized in that: 1800mm≤L≤2200mm.

8. The battery device according to any one of claims 1 to 7, characterized in that: The end plate has a slot at the end facing away from the battery cell assembly, and the restraint member is fitted into the slot.

9. The battery device according to any one of claims 1 to 8, characterized in that: The battery device further includes a housing, in which the battery cell assembly is housed, and the end of the battery cell assembly facing away from the reinforcing member along the height direction is connected to the housing.

10. The battery device according to any one of claims 1 to 9, characterized in that: In the height direction of the battery cell assembly, the first of the at least two restraining members is located in the upper half of the battery cell assembly, and the second of the at least two restraining members is located in the lower half of the battery cell assembly.

11. The battery device according to claim 10, characterized in that: In the height direction of the battery cell assembly, a third restraint member of at least two of the restraint members is disposed between the first restraint member and the second restraint member.

12. An energy storage device, characterized in that: Includes the battery device as described in any one of claims 1 to 11, the battery device being used to store or provide electrical energy.

13. The energy storage device according to claim 12, characterized in that, The energy storage device includes a cabinet, and the length direction of the battery cell assembly is the width direction of the cabinet.

14. An energy storage system, characterized in that: It includes a power conversion device and an energy storage device as described in claim 12 or 13, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

15. A charging network, characterized in that: It includes a charging pile and an energy storage device as described in claim 12 or 13 or an energy storage system as described in claim 14, wherein the energy storage device is used to provide electrical energy to the charging pile.

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