Reinforcing member, battery device, energy storage device, energy storage system, and charging network

Abstract

The present application provides a reinforcing member (40), 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) 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 the reinforcing member (40) is disposed 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 stability of the battery cells (20) can be effectively improved.

Description

Reinforcing components, battery devices, energy storage devices, energy storage systems, and charging networks

[0001] This application claims priority to Chinese Patent Application No. 202422772444.9, filed on November 13, 2024, entitled “Reinforcement, 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, which relies solely on restraints, may not be able to suppress the expansion and deformation of the battery cell assembly, leading to loosening or even damage to the battery cell assembly.

[0005] Application content

[0006] The purpose of this application is to provide a reinforcing member, battery device, energy storage device, energy storage system, and charging network, aiming to solve the problem that in related technologies, the restraining member of the battery cell assembly may not be able to meet the expansion force of the battery cell, 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 its length. At least two restraining members are fitted onto the battery cell assembly, the restraining members surrounding the peripheral sidewall of the battery cell assembly along its width and attached to each end plate. A reinforcing member is provided at any end of the battery cell assembly along its height, and the two ends of the reinforcing member along its length are respectively attached to the end plates. The reinforcing member includes a clearance structure for clearance of functional components disposed on any end face of the battery cell along its height.

[0009] The beneficial effects of the embodiments of this application are as follows: The battery device provided in this application involves arranging multiple battery cells to form a battery cell assembly. End plates are provided at both ends of the battery cell assembly along its length and secured with at least two binding members. Simultaneously, a reinforcing member is used at any end of the battery cell assembly along its height to attach 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 its length. 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 and improving the stability of the battery cell assembly. Consequently, the probability of the battery cell assembly becoming loose or damaged due to loss of restraint is also reduced. At the same time, the reinforcing member can avoid functional components through an avoidance structure, meaning that the reinforcing member has a low degree of influence on the functional components.

[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, in the height direction of the battery cell assembly, the functional component includes an explosion-proof valve disposed on the same side of the battery cell as the reinforcement; the clearance structure is a clearance opening opened on the reinforcement, and the explosion-proof valves of each battery cell in the battery cell assembly are connected to the clearance opening.

[0013] By adopting the above technical solution, by opening a clearance opening on the reinforcing member to connect with the explosion-proof valve of each battery cell to form a clearance, the explosion-proof valve can smoothly perform pressure relief operation in the event of thermal runaway of the battery cell.

[0014] In some embodiments, in the height direction of the battery cell assembly, the functional components include an explosion-proof valve and an electrode terminal disposed on the same side of the battery cell as the reinforcing member, and the reinforcing member is offset from the explosion-proof valve and the electrode terminal.

[0015] By adopting the above technical solution, the reinforcing member is staggered with the explosion-proof valve and the electrode terminal to reduce the probability of the explosion-proof valve failing due to the reinforcing member blocking the explosion-proof valve, and at the same time, it can also reduce the probability of short circuit between the reinforcing member and the electrode terminal.

[0016] In some embodiments, the number of reinforcing members is at least two, and in the height direction of the battery cell assembly, the projection of the reinforcing member is located between two electrode terminals, and at least a portion of the projection of the explosion-proof valve is located between two adjacent reinforcing members.

[0017] By adopting the above technical solution, the reinforcing member can be placed between the two electrode terminals to form a misalignment, and the explosion-proof valve can be placed between two adjacent reinforcing members to reduce the probability of the explosion-proof valve failing due to the reinforcing member blocking the explosion-proof valve.

[0018] In some embodiments, the reinforcement is a steel pressure strip.

[0019] By adopting the above technical solution, using steel pressure strips as reinforcement to connect the end plates at opposite ends of the battery cell assembly, the steel pressure strips can provide greater restraint and are less prone to breakage.

[0020] In some embodiments, the surface of the reinforcing member is covered with an insulating structure.

[0021] By adopting the above technical solution, the insulation protection capability of the reinforcing member is improved by covering the surface of the reinforcing member with an insulating structure, so as to ensure the requirements of electrical clearance and creepage distance between the reinforcing member and the battery cell, and at the same time, the probability of short circuit can be reduced.

[0022] In some embodiments, in the height direction of the battery cell assembly, the portion of the surface of the reinforcing member that overlaps with the projection of the battery cell assembly is covered with an insulating structure.

[0023] By adopting the above technical solution, an insulating structure can be applied only to the surface of the part where the reinforcement and the battery cell assembly overlap in the height direction. This can ensure electrical clearance while also reducing the amount of material used for the insulating structure.

[0024] In some embodiments, a support structure is provided on the side of the reinforcing member facing the battery cell assembly.

[0025] By adopting the above technical solution, the support structure can be used to support the reinforcing member and the battery cell, thereby reducing the probability of the reinforcing member deforming and coming into contact with the battery cell.

[0026] 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.

[0027] By adopting the above technical solution, a reinforcing member is provided at one end of the battery cell assembly along the height direction to form a constraint, and the other end of the battery cell assembly along the height direction can be connected to the housing, and the connection with the housing forms a constraint to further improve the stability of the battery cell assembly.

[0028] Secondly, embodiments of this application also provide a reinforcing member for securing a battery cell assembly. The reinforcing member includes a first fixed end and a second fixed end for securing the battery cell assembly to be secured. Between the first fixed end and the second fixed end, the reinforcing member includes a clearance structure for clearance of functional components of the battery cell assembly to be secured.

[0029] The beneficial effects of the embodiments of this application are as follows: The reinforcing member provided in the embodiments of this application can bind the battery cell assembly at any end in the height direction of the battery cell assembly, thereby improving the stability of the battery cell assembly.

[0030] In some embodiments, the surface of the reinforcing member is covered with an insulating structure.

[0031] By adopting the above technical solution, the insulation protection capability of the reinforcing member is improved by covering the surface of the reinforcing member with an insulating structure, so as to ensure the requirements of electrical clearance and creepage distance between the reinforcing member and the battery cell assembly to be bound, and at the same time, the probability of short circuit can be reduced.

[0032] In some embodiments, a support structure is provided on the side of the reinforcing member facing the battery cell assembly.

[0033] By adopting the above technical solution, the support structure can be used to support the reinforcing member and the battery cell assembly to be bound, thereby reducing the probability that the reinforcing member will deform and come into contact with the battery cell assembly to be bound.

[0034] Thirdly, 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Fourthly, 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.

[0039] 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.

[0040] Fifthly, 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.

[0041] 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

[0042] 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.

[0043] Figure 1 is a schematic diagram of the energy storage device provided in an embodiment of this application;

[0044] Figure 2 is an exploded view of a battery device provided in some embodiments of this application;

[0045] Figure 3 is a schematic diagram of the structure of the first type of battery cell assembly provided in the embodiment of this application;

[0046] Figure 4 is a magnified view of part A in Figure 3;

[0047] Figure 5 is a schematic diagram of the structure of the first type of battery cell assembly provided in the embodiment of this application;

[0048] Figure 6 is a schematic diagram of the structure of the first type of battery cell assembly provided in the embodiment of this application;

[0049] Figure 7 is a schematic diagram of the structure of the first type of battery cell assembly provided in the embodiment of this application;

[0050] Figure 8 is a schematic diagram of one side structure of the reinforcing member provided in the embodiment of this application;

[0051] Figure 9 is a schematic diagram of the other side of the reinforcing member provided in the embodiment of this application;

[0052] Figure 10 is an exploded view of a single battery cell provided in an embodiment of this application;

[0053] Figure 11 is a schematic diagram of the connection between another reinforcing member and a battery cell assembly provided in an embodiment of this application;

[0054] Figure 12 is a schematic diagram of the energy storage system provided in an embodiment of this application;

[0055] Figure 13 is a schematic diagram of the charging network provided in an embodiment of this application.

[0056] In the figures, the following labels are used: 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; 10, enclosure; 20, battery cell; 21, end cap; 22, housing; 23, electrode assembly; 231, electrode tab; 24, functional component; 241, explosion-proof valve; 242, electrode terminal; 30, restraint component; 40, reinforcing component; 41, clearance structure; 411, clearance opening; 42, first fixed end; 43, second fixed end; 50, end plate; 60, insulation structure; 70, support structure. Detailed Implementation

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] Based on the above considerations, in order to solve the problem that the binding components 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 components. 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 components to act on the end plates and bind the battery cell assembly simultaneously, the expansion force generated by the battery cells can be effectively constrained, thereby improving the stability of the battery cell assembly and effectively reducing the problem of loosening or even damage to the battery cell assembly.

[0065] 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.

[0066] 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.

[0067] In some embodiments, the battery cell assembly 110 is typically formed by arranging a plurality of battery cells 20.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] According to some embodiments of this application, referring to Figures 2 to 4, this application provides a battery device 100, including a restraint 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 restraint members 30 are sleeved on the battery cell assembly 110. The restraint 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 member 40 is attached to the end plate 50 at its opposite ends along the length direction X. The reinforcing member 40 includes a clearance structure 41 for clearance of functional components 24 disposed on any end face of the battery cell 20 in the height direction Z.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] The restraint member 30 surrounds the peripheral sidewall of the battery cell assembly 110 along the width direction Y and is sleeved on 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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 be firmly connected to the end plate 50 by welding, fastener connection, or other methods. The end of the reinforcing member 40 can be bent to form a flange structure so as to form a large surface contact with the surface of the end plate 50 for fixation.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] The reinforcing member 40 includes a clearance structure 41. Optionally, the clearance structure 41 may include, but is not limited to, an open structure, a slotted structure, a through-hole structure, a bent structure, an arc-shaped structure, or other structures capable of achieving clearance. Functional components 24 refer to components capable of performing specific functions, such as electrode terminals 242 and explosion-proof valves 241. Understandably, the clearance structure 41 is used to clearance against functional components 24 disposed on any end face in the height direction Z of the battery cell 20, so that the functional components 24 are less affected by the reinforcing member 40.

[0092] The battery device provided in this application embodiment, after multiple battery cells 20 are 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 to attach the end plates 50 at either end in the height direction Z of the battery cell assembly 110. 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 and improving the stability of the battery cell assembly 110. As a result, the probability of the battery cell assembly 110 losing its binding and becoming loose or damaged is also reduced. At the same time, the reinforcing member 40 can avoid the functional component 24 through the avoidance structure 41, that is, the reinforcing member 40 has a low degree of influence on the functional component 24.

[0093] Referring to Figures 3, 4 and 10, in some embodiments, the reinforcing member 40 is located in the middle region of the battery cell 20 in the width direction Y of the battery cell assembly 110.

[0094] In some embodiments, the battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components 24.

[0095] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, allowing battery cell 20 to have higher structural strength and improved reliability. Functional components 24 such as electrode terminals 242 and explosion-proof valves 241 can be provided on end cap 21. Electrode terminals 242 can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, explosion-proof valve 241 can be provided on end cap 21. The material of end cap 21 can also be various, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0096] It should be understood that when the reinforcing member 40 and the electrode terminal 242 are located on the same side, the reinforcing member 40 and the electrode terminal 242 need to be staggered to avoid the risk of short circuit caused by direct contact between the reinforcing member 40 and the electrode terminal 242. Exemplarily, in some embodiments, when there are two electrode terminals 242, the reinforcing member 40 can be disposed between the two electrode terminals 242 and form a gap between each of them.

[0097] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The housing 22 can be made of various materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0098] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode plates without active material each constitute a tab 231. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 231 connect to the electrode terminals 242 to form a current loop.

[0099] The aforementioned intermediate region refers to a portion of the battery cell assembly 110 along the width direction Y, including the explosion-proof valve 241, or the region between the two electrode terminals 242, or a portion of either of the two electrode terminals 242.

[0100] 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.

[0101] Referring to Figures 4, 8, and 10, in some embodiments, in the height direction Z of the battery cell assembly 110, the functional component 24 includes an explosion-proof valve 241 disposed on the same side of the battery cell 20 as the reinforcing member 40; the clearance structure 41 is a clearance opening 411 opened on the reinforcing member, and the explosion-proof valve 241 of each battery cell 20 in the battery cell assembly 110 is connected to the clearance opening 411.

[0102] The explosion-proof valve 241 is a pressure relief structure. When the battery cell 20 experiences thermal runaway, causing the internal pressure or temperature to reach a threshold, the explosion-proof valve 241 will open to release the internal pressure, thereby reducing the risk of the battery cell 20 burning or exploding.

[0103] The reinforcing member 40 is provided with a clearance opening 411; optionally, the clearance opening 411 can be a through hole opened in the middle of the reinforcing member 40 along the width direction Y of the battery cell assembly 110; or, the clearance opening 411 can also be a notch opened at any end of the reinforcing member 40 along the width direction Y of the battery cell assembly 110.

[0104] The number of clearance openings 411 can be one; when the number of clearance openings 411 is one, the clearance opening 411 is arranged along the length direction X of the battery cell assembly 110, and the clearance opening 411 can be simultaneously connected to the explosion-proof valve 241 of each battery cell 20 in the battery cell assembly 110.

[0105] Alternatively, the number of clearance openings 411 can be any number of two, three, or more. For example, in some embodiments, the number of clearance openings 411 can be any number of two or more, and each clearance opening 411 can connect to the explosion-proof valves 241 of at least two battery cells 20; thus, multiple clearance openings 411 are sequentially spaced along the length direction X of the battery cell assembly 110 on the reinforcing member 40, and each clearance opening 411 connects to the explosion-proof valves 241 of multiple battery cells 20, so that the explosion-proof valves 241 of each battery cell 20 in the battery cell assembly 110 can be connected to the outside through the corresponding clearance opening 411. Alternatively, in other embodiments, the number of clearance ports 411 can be the same as the number of explosion-proof valves 241. Multiple clearance ports 411 are sequentially spaced along the length direction X of the battery cell assembly 110 on the reinforcing member 40, and each clearance port 411 is connected to the explosion-proof valve 241 of the corresponding battery cell 20, so as to achieve clearance of all explosion-proof valves 241 in the battery cell assembly 110.

[0106] By opening a clearance opening 411 on the reinforcing member 40 to connect with the explosion-proof valve 241 of each battery cell 20 to form a clearance, the explosion-proof valve 241 can smoothly perform pressure relief operation in the event of thermal runaway of the battery cell 20, thereby reducing the risk of combustion or explosion of the battery cell 20.

[0107] Referring to Figures 10 and 11, in some embodiments, in the height direction Z of the battery cell assembly 110, the functional component 24 includes an explosion-proof valve 241 and an electrode terminal 242 disposed on the same side of the battery cell 20 as the reinforcing member 40, and the reinforcing member 40 is offset from the explosion-proof valve 241 and the electrode terminal 242.

[0108] Understandably, when the reinforcing member 40, the explosion-proof valve 241, and the electrode terminal 242 are located at the same end of the battery cell 20, the reinforcing member 40, the explosion-proof valve 241, and the electrode terminal 242 are all staggered; that is, at least a part of the explosion-proof valve 241 can be exposed, so that the explosion-proof valve 241 can play the role of relieving pressure and venting; at the same time, the staggered arrangement between the reinforcing member 40 and the electrode terminal 242 forms a gap, and the probability of short circuit between the reinforcing member 40 and the electrode terminal 242 is effectively reduced.

[0109] For example, in some embodiments, the battery cell 20 includes a housing 22 and an end cap 21 covering the housing 22. The end cap 21 is provided with an explosion-proof valve 241 and two electrode terminals 242, with the explosion-proof valve 241 located between the electrode terminals 242. The reinforcing member 40 can bind the battery cell assembly 110 from one side of the end cap 21 and is connected to the end plate 50. The reinforcing member 40 is misaligned with both the explosion-proof valve 241 and the electrode terminals 242. For example, the reinforcing member can be located between the two electrode terminals 242 and misaligned with the explosion-proof valve 241. That is, the reinforcing member 40 forms a gap with each of the two electrode terminals 242, and the reinforcing member 40 does not overlap with the explosion-proof valve 241. The explosion-proof valve 241 can normally perform pressure relief and venting operations.

[0110] With this configuration, the reinforcing member 40 and the explosion-proof valve 241 are misaligned, which can effectively reduce the probability that the explosion-proof valve 241 will fail due to the reinforcing member 40 blocking the explosion-proof valve 241.

[0111] Referring to Figures 10 and 11, in some embodiments, the number of reinforcing members 40 is at least two. In the height direction Z of the battery cell assembly 110, the projection of the reinforcing member 40 is located between two electrode terminals 242, and at least a portion of the projection of the explosion-proof valve 241 is located between two adjacent reinforcing members 40.

[0112] Optionally, the number of reinforcing members 40 can be any number of two, three or more; multiple reinforcing members 40 can be used simultaneously to connect the end plate and constrain the battery cell assembly 110.

[0113] In the height direction Z of the battery cell assembly 110, the projection of the reinforcing member 40 is located between the two electrode terminals 242, that is, multiple reinforcing members 40 are located between the two electrode terminals 242, and a certain distance is formed between the reinforcing member 40 and the electrode terminal 242, thereby effectively reducing the probability of short circuit.

[0114] In the height direction Z of the battery cell assembly 110, at least a portion of the projection of the explosion-proof valve 241 is located between two adjacent reinforcing members 40. It should be understood that when there are multiple reinforcing members 40, all reinforcing members 40 are staggered with the explosion-proof valve 241, and are located on both sides of the explosion-proof valve 241 to provide sufficient constraint on the battery cell assembly 110. Simultaneously, the multiple reinforcing members 40 can also distribute the expansion force of the battery cell assembly 110, reducing the expansion force on each reinforcing member 40. This allows the width of the reinforcing member 40 to be set smaller, thereby reducing the impact of the reinforcing member 40 on the sealing of the explosion-proof valve 241.

[0115] In some embodiments, for example, the battery cell 20 includes a housing 22 and an end cap 21 covering the housing 22. The end cap 21 is provided with an explosion-proof valve 241 and two electrode terminals 242, with the explosion-proof valve 241 located between the electrode terminals 242. There can be two reinforcing members 40. The reinforcing members 40 can bind the battery cell assembly 110 from one side of the end cap 21 and connect to the end plate. One reinforcing member 40 can be disposed between one of the electrode terminals 242 and the explosion-proof valve 241, and the other reinforcing member 40 can be disposed between the other electrode terminal 242 and the explosion-proof valve 241. Thus, while providing a restraining force, the reinforcing member 40 can avoid the explosion-proof valve 241 to reduce the impact on the explosion-proof valve 241.

[0116] This arrangement allows the reinforcing member 40 to be positioned between the two electrode terminals 242 in a staggered manner, thereby reducing the probability of short circuit between the reinforcing member 40 and the electrode terminals 242. At the same time, the explosion-proof valve 241 is positioned between two adjacent reinforcing members 40, which, while ensuring the constraint force of the reinforcing member 40 on the battery cell assembly 110, also reduces the probability of the explosion-proof valve 241 failing due to the reinforcing member 40 blocking the explosion-proof valve 241.

[0117] Please refer to Figures 4 and 8. In some embodiments, the reinforcing member 40 is a steel pressure strip.

[0118] Understandably, the steel pressure strip possesses superior tensile strength due to the inherent properties of steel, thus providing a more effective constraint on the battery cell module 110. Furthermore, the probability of the steel pressure strip breaking is also lower.

[0119] With this configuration, the steel pressure strip is used as a reinforcing member 40 to connect the end plates at opposite ends of the battery cell assembly 110. The steel pressure strip can provide greater restraint and is less prone to breakage.

[0120] Referring to Figures 4, 8 and 9, in some embodiments, the surface of the reinforcing member 40 is covered with an insulating structure 60.

[0121] Understandably, the insulating structure 60 is used to provide insulation protection for the reinforcement 40 in order to reduce the creepage distance between the reinforcement 40 and the battery cell 20.

[0122] Optionally, the insulating structure 60 may include, but is not limited to, insulating sleeves, insulating tapes, insulating sheets, and other structures with superior insulation properties; or, the insulating structure 60 may also be a layered structure formed by spraying. For example, the insulating structure 60 may be an insulating and fire-resistant structure such as a ceramic composite tape, a powder coating layer, or mica paper.

[0123] The insulating structure 60 can completely cover the reinforcing member 40; or the insulating structure 60 can only cover a part of the reinforcing member 40, such as the area near the battery cell 20, or the area near the electrode terminal 242 or other charged structures on the battery cell 20.

[0124] This configuration enhances the insulation protection capability of the reinforcing member 40 by covering its surface with an insulating structure 60, ensuring the electrical clearance and creepage distance requirements between the reinforcing member 40 and the battery cell 20, while also reducing the probability of short circuits.

[0125] Referring to Figures 3, 4, 8 and 9, in some embodiments, an insulating structure 60 is provided on the surface of the reinforcing member 40 that overlaps with the projection of the battery cell assembly 110 in the height direction Z.

[0126] It should be understood that, in order to meet the electrical connection of the battery cells 20 in the battery cell assembly 110, electrical connectors, such as metal structures with good conductivity like aluminum sheets, copper sheets, silver sheets, and gold sheets, are provided on the battery cell assembly 110. In some embodiments, the electrode terminals 242 provided on the battery cells 20 and the reinforcing member 40 can be located on the same side of the battery cell assembly 110; therefore, it is necessary to cover the surface of the reinforcing member 40 that overlaps with the projection of the battery cell assembly 110 along the height direction Z with an insulating structure 60 to increase the creepage distance between the reinforcing member 40 and the electrical connector, thereby reducing the probability of short circuit. The portion of the reinforcing member 40 that bends towards the surface of the end plate opposite to the battery cell assembly 110 and connects to the outer surface of the end plate 50 may not be covered with an insulating structure 60.

[0127] With this configuration, the insulation structure 60 can be applied only to the surface of the part where the projection of the reinforcing member 40 and the battery cell assembly 110 in the height direction Z. This can ensure electrical clearance while also reducing the amount of material used for the insulation structure 60.

[0128] Referring to Figures 4, 8, and 9, in some embodiments, the reinforcing member 40 is provided with a support structure 70 on the side facing the battery cell assembly 110.

[0129] The support structure 70 is used to support the reinforcing member 40 and the battery cell assembly 110. When the reinforcing member 40 deforms, for example, when a long reinforcing member 40 deforms under its own weight and bends towards the battery cell assembly 110, the support structure 70 can support the reinforcing member 40 to reduce the probability of direct contact between the reinforcing member 40 and the battery cell assembly 110, thereby effectively reducing the probability of short circuit.

[0130] Optionally, the support structure 70 can be connected to the reinforcing member 40 by means of bonding, fastener connection or other means; one end of the support structure 70 is connected to the reinforcing member 40, and the other end of the support structure 70 can abut against any battery cell 20 of the battery cell assembly 110, or the other end of the support structure 70 can also form a gap with the battery cell 20.

[0131] The supporting structure 70 may, but is not limited to, use rigid and insulating materials such as silicone foam (e.g., melamine foam, hard rubber, plastic parts).

[0132] In some embodiments, there may be one support structure 70, which can be bonded to the reinforcing member 40 and may be located in the middle section of the reinforcing member 40. For example, the length of the support structure 70 may be slightly shorter than the length of the reinforcing member 40 along the length direction X of the battery cell assembly 110, thereby enabling the support structure 70 to act on most of the area of ​​the reinforcing member 40.

[0133] In other embodiments, the number of support structures 70 can be multiple, such as two, three, or more than three. Multiple support structures 70 can be sequentially arranged at intervals along the length X of the battery cell assembly 110 and connected to the reinforcing member 40. Alternatively, multiple support structures 70 can be arranged in at least two rows at intervals along a direction perpendicular to the length X of the battery cell assembly 110, with multiple sets of support structures 70 sequentially arranged at intervals along the length X of the battery cell assembly 110. For example, when the reinforcing member 40 has an opening 411, support structures 70 can be provided on both sides of the reinforcing member 40 located at the opening 411 in a direction perpendicular to the length X of the battery cell assembly 110, and multiple sets of support structures 70 can be sequentially arranged at intervals along the length X of the battery cell assembly 110.

[0134] With this configuration, the support structure 70 can be used to support the reinforcing member 40 and the battery cell 20, thereby reducing the probability that the reinforcing member 40 will deform and come into contact with the battery cell 20.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] The battery device 100 provided in this application will now be further described according to specific embodiments.

[0141] Referring to Figures 1 to 10, in this embodiment, the battery device 100 includes a housing 10, a restraining member, a reinforcing member 40, and a plurality of battery cells 20. The plurality of battery cells 20 can be arranged sequentially along one direction to form at least one battery cell assembly 110, and each end of the battery cell assembly 110 is provided with an end plate 50 at both opposite ends along the length direction X.

[0142] Two restraining members 30 are fitted onto the battery cell assembly 110. In this embodiment, both restraining members 30 are steel strips, which wrap around the peripheral sidewalls of the battery cell assembly 110 along the width direction Y and are fitted onto the end plates 50 at both ends. One end of the battery cell assembly 110 along the height direction Z is connected to the housing 10, and the other end of the battery cell assembly 110 along the height direction Z is provided with a reinforcing member 40. In this embodiment, the reinforcing member 40 can be a steel pressure strip. The opposite ends of the steel pressure strip abut against the side surface of the end plate 50 facing away from the battery cell assembly 110, and the two ends are locked to the end plate 50 by fasteners.

[0143] The steel pressure strip has a clearance structure 41 in its middle, such as a clearance opening 411, which connects to the explosion-proof valves 241 of each battery cell 20 in the battery cell assembly 110. The surface of the steel pressure strip is covered with an insulating structure 60. In this embodiment, the insulating structure 60 can be a ceramic composite tape, which covers the surface of the steel pressure strip to provide insulation protection. A support structure 70 is provided at the end of the steel pressure strip facing the battery cell assembly 110. In this embodiment, the support structure 70 can be block-shaped silicone foam, which can be bonded to the ceramic composite tape covering the steel pressure strip. The silicone foam provides support for the steel pressure strip, reducing the probability of the steel pressure strip deforming and contacting the battery cell 20.

[0144] Referring to Figures 3, 4, 8, and 9, this embodiment of the application also provides a reinforcing member 40, which is used to restrain the battery cell assembly 110. The reinforcing member 40 includes a first fixing end 42 and a second fixing end 43 for fixing to the battery cell assembly 110 to be restrained. Between the first fixing end 42 and the second fixing end 43, the reinforcing member 40 includes a clearance structure 41 for clearance of the functional component 24 of the battery cell assembly 110 to be restrained.

[0145] The first fixed end 42 is a flanged structure formed by bending one end of the reinforcing member 40 in the length direction X of the battery cell assembly 110; similarly, the second fixed end 42 is a flanged structure formed by bending the other end of the reinforcing member 40 in the length direction X of the battery cell assembly 110. The first fixed end 42 and the second fixed end 43 respectively form a large surface contact with the end plate 50 on the corresponding side to reduce the risk of stress concentration.

[0146] The reinforcing member 40 provided in this application embodiment can bind the battery cell assembly 110 at any end in the height direction Z of the battery cell assembly 110 to improve the stability of the battery cell assembly 110.

[0147] Referring to Figures 4, 8 and 9, in some embodiments, the surface of the reinforcing member 40 is covered with an insulating structure 60.

[0148] This configuration enhances the insulation protection capability of the reinforcing member 40 by covering its surface with an insulating structure 60, ensuring the electrical clearance and creepage distance requirements between the reinforcing member 40 and the battery cell assembly 110 to be bound, while also reducing the probability of short circuits.

[0149] Referring to Figures 4, 8, and 9, in some embodiments, the reinforcing member 40 is provided with a support structure 70 on the side facing the battery cell assembly 110.

[0150] With this configuration, the support structure 70 can be used to support the reinforcing member 40 and the battery cell assembly 110 to be bound, thereby reducing the probability that the reinforcing member 40 will deform and come into contact with the battery cell assembly 110 to be bound.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] In some embodiments, the energy storage device 1000 is an energy storage container or an energy storage cabinet.

[0155] In some embodiments, the energy storage device 1000 may include a cabinet and one or more battery clusters, the battery clusters being housed in the cabinet 1100.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] Referring to Figures 1 and 12, 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.

[0167] 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.

[0168] 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.

[0169] Referring to Figures 1, 12, and 13, 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.

[0170] 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.

[0171] 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.

[0172] 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.

[0173] 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 by: 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; The reinforcing member includes a clearance structure for avoiding functional components disposed on any end face of the battery cell in the height direction.

2. The battery device of claim 1, wherein: 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 1 or 2, characterized by: In the height direction of the battery cell assembly, the functional component includes an explosion-proof valve disposed on the same side of the battery cell as the reinforcing member; The avoidance structure is an avoidance opening opened on the reinforcing member, and the explosion-proof valve of each battery cell in the battery cell assembly is connected to the avoidance opening.

4. The battery device according to claim 1 or 2, characterized by: In the height direction of the battery cell assembly, the functional components include an explosion-proof valve and an electrode terminal disposed on the same side of the battery cell as the reinforcing member, and the reinforcing member is offset from the explosion-proof valve and the electrode terminal.

5. The battery device of claim 4, wherein: The number of reinforcing members is at least two. In the height direction of the battery cell assembly, the projection of the reinforcing member is located between the two electrode terminals, and at least a portion of the projection of the explosion-proof valve is located between two adjacent reinforcing members.

6. The battery device according to any one of claims 1 to 5, characterized by: The reinforcing member is a steel pressure strip.

7. The battery device according to any one of claims 1 to 6, characterized by: The surface of the reinforcing member is covered with an insulating structure.

8. The battery device of claim 7, wherein: The insulating structure is applied to the portion of the surface of the reinforcing member that overlaps with the projection of the battery cell assembly in the height direction of the battery cell assembly.

9. The battery device according to any one of claims 1 to 8, characterized by: The reinforcing member has a support structure on the side facing the battery cell assembly.

10. The battery device according to any one of claims 1 to 9, characterized by: 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.

11. A reinforcement characterized by: The reinforcing member is used to secure the battery cell assembly. The reinforcing member includes a first fixed end and a second fixed end for fixing to the battery cell assembly to be secured. Between the first fixed end and the second fixed end, the reinforcing member includes a clearance structure for avoiding the functional components of the battery cell assembly to be secured.

12. The reinforcement of claim 11, wherein: The surface of the reinforcing member is covered with an insulating structure.

13. A reinforcement according to claim 11 or 12, characterised in that: The reinforcing member has a support structure on the side facing the battery cell assembly.

14. An energy storage device, characterized by: Includes the battery device as described in any one of claims 1 to 10, the battery device being used to store or provide electrical energy.

15. The energy storage device of claim 14, wherein: The energy storage device includes a cabinet, and the length direction of the battery cell assembly is the width direction of the cabinet.

16. An energy storage system characterized by: It includes a power conversion device and an energy storage device as described in claim 14 or 15, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

17. A charging network characterized by: comprising a charging post and an energy storage device as claimed in claim 14 or 15 or an energy storage system as claimed in claim 16, the energy storage device being used to provide electrical energy for the charging post.

Images