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

Abstract

The utility model relates to the technical field of battery structures, and provides a reinforcer, a battery device, an energy storage device, an energy storage system and a charging network, the battery device comprises a plurality of battery monomers, the plurality of battery monomers are arranged to form at least one battery monomer assembly, and end plates are arranged at the two opposite ends of the battery monomer assembly in the length direction; the battery monomer assembly is sleeved with at least two binding pieces, and the binding pieces surround the peripheral side wall of the battery monomer assembly in the width direction and are attached to the end plates; a reinforcing piece is arranged at any end of the battery monomer assembly in the height direction, and two opposite ends of the reinforcing piece in the length direction are respectively attached to the end plates; according to the battery device provided by the embodiment of the invention, the reinforcing piece and the at least two binding pieces jointly act on the end plates at the two ends of the battery monomer assembly in the length direction, so that the stability of the battery monomer can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery structure, and particularly provides a battery device, an energy storage device, an energy storage system and a charging network. BACKGROUND

[0002] With the development of new energy technology, batteries are increasingly widely used, for example, in energy storage devices and power consumption devices, such as energy storage cabinets, energy storage containers, mobile phones, notebook computers, electric vehicles, electric cars, electric planes, electric ships, electric toy cars, electric toy ships, electric toy planes and electric tools.

[0003] The battery device usually includes a plurality of battery monomers, which are arranged in groups, and the battery monomers are usually bundled and bound with end plates after being arranged in groups to meet the expansion force requirement of the battery monomers. However, in the related art, only the bundling and binding method using the binding member may not be able to inhibit the expansion deformation of the battery monomer assembly, thereby causing the battery monomer assembly to loosen or even be damaged. UTILITY MODEL CONTENT

[0004] The purpose of the embodiments of the present application is to provide a reinforcing member, a battery device, an energy storage device, an energy storage system and a charging network, aiming to solve the problem that the battery monomer assembly in the related art may not be able to meet the expansion force collapse of the battery monomer, resulting in loosening or damage.

[0005] To achieve the above-mentioned purpose, the technical solutions adopted by the embodiments of the present application are as follows:

[0006] In a first aspect, the embodiments of the present application provide a battery device, including a binding member, a reinforcing member and a plurality of battery monomers, the plurality of battery monomers being arranged to form at least one battery monomer assembly, the battery monomer assembly being provided with end plates at opposite ends along a length direction; the battery monomer assembly is sleeved with at least two binding members, the binding members being wrapped around the circumferential wall of the battery monomer assembly along a width direction and being attached to the end plates; the battery monomer assembly is provided with the reinforcing member at any end along a height direction, the reinforcing member being attached to the end plates at opposite ends along the length direction; wherein the reinforcing member includes an avoiding structure for avoiding functional components arranged on any end surface of the battery monomer along the height direction.

[0007] The battery device provided by the embodiments of the present application has the following beneficial effects: after a plurality of battery monomers are arranged to form a battery monomer assembly, end plates are arranged at both ends of the battery monomer assembly in the length direction of the battery monomer assembly, and at least two binding members are used to wrap and bind the end plates, and meanwhile, a reinforcing member is used to attach the end plates at opposite ends in the height direction of the battery monomer assembly; that is, the reinforcing member and the at least two binding members jointly act on the end plates at both ends of the battery monomer assembly in the length direction of the battery monomer assembly, and the reinforcing member and the at least two binding members can share the expansion force of the battery monomers in the battery monomer assembly, thereby effectively reducing the probability of breakage of the binding members, improving the stability of the battery monomer assembly, and further reducing the probability of loosening or damage of the battery monomer assembly due to the loss of binding.

[0008] In some embodiments, in the width direction of the battery monomer assembly, the reinforcing member is located in the middle region of the battery monomers.

[0009] By adopting the above technical solution, when the battery monomers expand, the middle part of the battery monomers expands more greatly, and thus the reinforcing member located in the middle region of the battery monomers in the width direction can achieve a better limiting and binding effect on the battery monomer assembly.

[0010] In some embodiments, in the height direction of the battery monomer assembly, the functional components include explosion-proof valves arranged on the same side of the battery monomers as the reinforcing member; and the avoiding structure is an avoiding opening formed on the reinforcing member, and the explosion-proof valves of each battery monomer in the battery monomer assembly are in communication with the avoiding opening.

[0011] By adopting the above technical solution, the avoiding opening is formed on the reinforcing member and is in communication with the explosion-proof valves of each battery monomer to form an avoiding structure, so that the explosion-proof valves can smoothly perform pressure relief operation in the case of thermal runaway of the battery monomers.

[0012] In some embodiments, in the height direction of the battery monomer assembly, the functional components include explosion-proof valves and electrode terminals arranged on the same side of the battery monomers as the reinforcing member, and the reinforcing member is arranged in a staggered manner with the explosion-proof valves and the electrode terminals.

[0013] By adopting the above technical solution, the reinforcing member is arranged in a staggered manner with the explosion-proof valves and the electrode terminals, so as to reduce the probability of failure of the explosion-proof valves caused by the blocking of the reinforcing member to the explosion-proof valves, and also reduce the probability of short circuit between the reinforcing member and the electrode terminals.

[0014] In some embodiments, the number of reinforcing members is at least two, and in the height direction of the battery monomer assembly, the projection of the reinforcing member is located between two electrode terminals, and at least part of the projection of the explosion-proof valve is located between two adjacent reinforcing members.

[0015] By adopting the technical scheme, the reinforcing member can be arranged to be staggered between the two electrode terminals, and the explosion-proof valve is arranged between the two adjacent reinforcing members, so as to reduce the probability that the reinforcing member blocks the explosion-proof valve and causes the explosion-proof valve to fail.

[0016] In some embodiments, the reinforcing member is a steel pressing belt.

[0017] By adopting the technical scheme, the steel pressing belt is used as the reinforcing member connected to the end plates at opposite ends of the battery monomer assembly, so that the steel pressing belt can provide greater constraint force and is less likely to break.

[0018] In some embodiments, the surface of the reinforcing member is covered with an insulating structure.

[0019] By adopting the technical scheme, the insulating structure is arranged on the surface of the reinforcing member to improve the insulation protection capability of the reinforcing member, so as to ensure the electrical clearance and creepage distance between the reinforcing member and the battery monomer, and reduce the probability of short circuit.

[0020] In some embodiments, in the height direction of the battery monomer assembly, the surface of the part of the reinforcing member that overlaps with the projection of the battery monomer assembly is covered with an insulating structure.

[0021] By adopting the technical scheme, the insulating structure is arranged only on the surface of the part of the reinforcing member that overlaps with the projection of the battery monomer assembly in the height direction, so as to ensure the electrical clearance and reduce the use of the insulating structure.

[0022] In some embodiments, the side of the reinforcing member facing the battery monomer assembly is provided with a support structure.

[0023] By adopting the technical scheme, the support structure can be used to support between the reinforcing member and the battery monomer, so as to reduce the probability that the reinforcing member deforms and contacts the battery monomer.

[0024] In some embodiments, the battery device further comprises a box, the battery monomer assembly is accommodated in the box, and one end of the battery monomer assembly in the height direction away from the reinforcing member is connected to the box.

[0025] By adopting the technical scheme, the reinforcing member is arranged at one end of the battery monomer assembly in the height direction to form a constraint, and the other end of the battery monomer assembly in the height direction can be connected to the box and form a constraint through the connection with the box, so as to further improve the stability of the battery monomer assembly.

[0026] In a second aspect, the embodiments of the present application further provide a reinforcing member, the reinforcing member being used for binding a battery monomer assembly, the reinforcing member comprising a first fixing end and a second fixing end, and being used for being fixed with the battery monomer assembly to be bound; between the first fixing end and the second fixing end, the reinforcing member comprises an avoiding structure, and is used for avoiding a functional component of the battery monomer assembly to be bound.

[0027] The reinforcing member provided by the embodiments of the present application can bind the battery monomer assembly at any end in the height direction of the battery monomer assembly, so as to improve the stability of the battery monomer assembly.

[0028] In some embodiments, the surface of the reinforcing member is covered with an insulating structure.

[0029] By adopting the technical solution, the insulating protection capability of the reinforcing member is improved by covering the surface of the reinforcing member with the insulating structure, so as to guarantee the electrical clearance and the creepage distance between the reinforcing member and the battery monomer assembly to be bound, and meanwhile, the probability of short circuit is reduced.

[0030] In some embodiments, the side of the reinforcing member facing the battery monomer assembly is provided with a supporting structure.

[0031] By adopting the technical solution, the supporting structure can be used for supporting between the reinforcing member and the battery monomer assembly to be bound, so as to reduce the probability that the reinforcing member is deformed to contact the battery monomer assembly to be bound.

[0032] In a third aspect, the embodiments of the present application further provide an energy storage device, comprising the battery device as described above, and the battery device is used for storing or providing electric energy.

[0033] The energy storage device provided by the embodiments of the present application comprises the battery device as described above, and in the case that the probability of the battery monomer assembly of the battery device being loose or damaged is low, the probability of the energy storage device being damaged is also low.

[0034] In some embodiments, the energy storage device comprises a cabinet body, and the length direction of the battery monomer assembly is the width direction of the cabinet body.

[0035] By adopting the technical solution, the length direction of the battery monomer assembly is arranged along the width direction of the cabinet body, so as to make the battery monomer assembly arranged more closely in the cabinet body, and the space utilization in the cabinet body is improved.

[0036] In a fourth aspect, the embodiments of the present application further provide an energy storage system, comprising a power conversion device and the energy storage device as described above, and the power conversion device is used for electrically connecting a power generation device and the energy storage device.

[0037] The energy storage system provided by the embodiments of the present application comprises the energy storage device, and thus the stability of the energy storage system is better.

[0038] In a fifth aspect, the embodiments of the present application further provide a charging network comprising a charging pile and the energy storage device or the energy storage system, and the energy storage device is used for providing electric energy for the charging pile.

[0039] The charging network provided by the embodiments of the present application comprises the energy storage device or the energy storage system, and thus the stability of the charging network is better. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or related description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0041] Figure 1 A structural schematic diagram of the energy storage device provided by the embodiments of the present application is shown in the figure.

[0042] Figure 2 An exploded view of the battery device provided by some embodiments of the present application is shown in the figure.

[0043] Figure 3 A structural schematic diagram of the first battery monomer assembly provided by the embodiments of the present application is shown in the figure.

[0044] Figure 4 A partial enlarged view of A in the figure. Figure 3

[0045] Figure 5 A structural schematic diagram of the first battery monomer assembly provided by the embodiments of the present application is shown in the figure.

[0046] Figure 6 A structural schematic diagram of the first battery monomer assembly provided by the embodiments of the present application is shown in the figure.

[0047] Figure 7 A structural schematic diagram of the first battery monomer assembly provided by the embodiments of the present application is shown in the figure.

[0048] Figure 8 A structural schematic diagram of one side of the reinforcing member provided by the embodiments of the present application is shown in the figure.

[0049] Figure 9 A structural schematic diagram of the other side of the reinforcing member provided by the embodiments of the present application is shown in the figure.

[0050] Figure 10 ​An exploded view of a battery monomer provided for an embodiment of the present application;

[0051] Figure 11 A schematic view of connection of another reinforcement and a battery monomer assembly provided for an embodiment of the present application;

[0052] Figure 12 A schematic view of structure of an energy storage system provided for an embodiment of the present application;

[0053] Figure 13 A schematic view of structure of a charging network provided for an embodiment of the present application.

[0054] In the drawings, various elements are labeled the same as or similarly to the same or similar elements throughout the drawings.

[0055] 1000, an energy storage device; 1100, a cabinet body; 2000, an energy storage system; 2100, a power conversion device; 2200, a power generation device; 3000, a charging network; 3100, a charging pile; 3110, a connector;

[0056] 100, a battery device;

[0057] 110, a battery monomer assembly; X, a length direction; Y, a width direction; Z, a height direction;

[0058] 10, a cabinet body;

[0059] 20, a battery monomer; 21, an end cover; 22, a shell; 23, an electrode assembly; 231, a tab; 24, a functional component; 241, an explosion-proof valve; 242, an electrode terminal;

[0060] 30, a binding member;

[0061] 40, a reinforcement; 41, an avoiding structure; 411, an avoiding opening; 42, a first fixed end; 43, a second fixed end;

[0062] 50, an end plate; 60, an insulation structure; 70, a support structure. DETAILED DESCRIPTION

[0063] Embodiments of the present application are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar notations represent 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 are intended to explain the present application, and cannot be understood as limiting the present application.

[0064] In the description of the present application, it needs to be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0065] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0066] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0067] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system such as hydroelectric, thermal, wind and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment and aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0068] A battery generally comprises a plurality of battery cells arranged in a group in a certain order. Since the battery cell generally contains a certain amount of gas inside, when the battery cell is charged or discharged, the solution in the electrolyte will undergo a gas generation or absorption reaction. The generation of these gases will cause the internal gas pressure of the battery cell to rise, thereby causing the battery cell to swell and deform. During the charging or discharging process of the battery cell, the positive and negative electrode materials will undergo chemical reactions to form new compounds, and these chemical reactions are accompanied by volume changes, which will cause the volume of the materials inside the battery cell to change, thereby also causing the battery to swell and deform. Since the battery cell will swell and deform during use, and the swelling and deformation is particularly evident in the arrangement direction; therefore, in order to limit the swelling and deformation of the battery cell, the battery cell assembly needs to be bound after the plurality of battery cells are arranged in a group to constrain the swelling force.

[0069] At present, the binding is generally provided by binding the battery cell assembly after the battery cell assembly is arranged in a group using a binding member. The specific operation is as follows: after the plurality of battery cells are arranged in a group, the battery cell assembly maintains a certain size under the pressure of a pressing device, and then the binding member is annularly sleeved outside the battery cell assembly to bind the entire battery cell assembly. However, this binding method using only the binding member may have the risk that the binding member is broken due to the excessive swelling force of the battery cell, thereby causing the battery cell assembly to loosen or even be damaged.

[0070] Based on the above considerations, in order to solve the problem that the binding member of the battery cell assembly may not be able to withstand the swelling force of the battery cell and cause the battery cell assembly to loosen or be damaged, a battery device is designed. After the battery cells of the battery device are arranged to form a battery cell assembly, end plates are arranged at both ends of the battery cell assembly in the length direction of the battery cell assembly, and at least two binding members are used to sleeve and bind the battery cell assembly, and a reinforcing member is used to connect the end plates at opposite ends of the battery cell assembly in the height direction of the battery cell assembly. By using the reinforcing member and the at least two binding members to simultaneously act on the end plates and bind the battery cell assembly, the swelling force generated by the battery cell can be effectively constrained, thereby improving the stability of the battery cell assembly and effectively reducing the problem of loosening or even damage of the battery cell assembly.

[0071] The battery cell disclosed in the embodiments of the present application can be used in a power consumption device using the battery device as a power source or a variety of energy storage systems using the battery device as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. The energy storage system can be, but is not limited to, an energy storage cabinet, an energy storage container, an energy storage power station, an energy storage and charging integrated machine, etc.

[0072] Please refer to Figure 2 , Figure 2 An exploded view of a battery device 100 is provided for some embodiments of the present application. The battery device 100 mentioned in embodiments of the present application can include one or more battery cell assemblies 110 for providing voltage and capacity. The battery cell assembly 110 can include a plurality of battery cells 20 connected in series, in parallel, or in a mixed connection through a busbar component.

[0073] In some embodiments, the battery cell assembly 110 is generally formed by arranging a plurality of battery cells 20.

[0074] As an example, the battery cell assembly 110 can be a battery module formed by arranging and fixing a plurality of battery cells 20 into an independent module.

[0075] In some embodiments, the battery device 100 can be a battery pack including a box 10 and one or more battery cell assemblies 110 housed in the box 10.

[0076] As an example, the battery cell assembly 110 can be a battery module, and the battery cell assembly 110 can be housed in the box 10 by fixing the battery module in the box 10.

[0077] As an example, the battery cell assembly 110 can also be housed in the box 10 by directly fixing a plurality of battery cells 20 in the box 10.

[0078] As an example, the box 10 can include a first box 10 and a second box 10. The first box 10 and the second box 10 are fastened so that an enclosed space is formed inside the box 10 to accommodate the battery cell assembly 110. Here, enclosed means covered or closed, which can be sealed or unsealed. The first box 10 can be a top cover or a bottom plate.

[0079] As an example, the box 10 can 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 an enclosed space is formed inside the box 10 to accommodate the battery cell assembly 110.

[0080] The technical solutions described in embodiments of the present application are applicable to various electric devices using battery cells 20, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft.

[0081] In embodiments of the present application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be activated by charging after discharging.

[0082] The battery cell 20 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the present application is not limited thereto.

[0083] According to some embodiments of the present application, referring to Figures 2 to 4 The present application provides a battery device 100, comprising a binding 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, and the battery cell assembly 110 is provided with an end plate 50 at opposite ends along the length direction X; the battery cell assembly 110 is sleeved with at least two binding members 30, the binding member 30 surrounds the circumferential wall of the battery cell assembly 110 along the width direction Y and is attached to each end plate 50; the battery cell assembly 110 is provided with a reinforcing member 40 at any end along the height direction Z, and the reinforcing member 40 is attached to the end plate 50 at opposite ends along the length direction X; wherein the reinforcing member 40 comprises an avoiding structure 41 for avoiding the functional component 24 arranged on any end surface of the battery cell 20 along the height direction Z.

[0084] The plurality of battery cells 20 are arranged to form at least one battery cell assembly 110; optionally, the plurality of battery cells 20 can be arranged in sequence along one direction; or the plurality of battery cells 20 can also be arranged in sequence along two mutually perpendicular directions. The battery cell 20 described above can be a prismatic battery cell 20, such as a rectangular battery cell 20, a square battery cell 20, etc.; or the battery cell 20 described above can also be a cylindrical battery cell 20. The number of battery cell assemblies 110 can be one, two, or any multiple of two or more.

[0085] Exemplarily, in some embodiments, the battery cell 20 can be a rectangular battery cell 20, and the plurality of rectangular battery cells 20 can be arranged in sequence along one direction to form a battery cell assembly 110; during use, the battery cell 20 deforms by swelling, and the swelling force of the plurality of battery cells 20 is superimposed along the arrangement direction, so that the swelling deformation of the battery cell assembly 110 along the arrangement direction is more obvious. It should be understood that in the present embodiment, the length direction X of the battery cell assembly 110 is the arrangement direction of the plurality of battery cells 20.

[0086] Alternatively, in some other embodiments, the battery cell 20 can be a square battery cell 20, and a plurality of square battery cells 20 can be arranged in sequence along two mutually perpendicular directions; wherein part of the battery cells 20 are arranged side by side along a first arrangement direction to form a horizontal row, and another part of the battery cells 20 are arranged along a 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 swell and deform, and the swelling forces of the plurality of battery cells 20 arranged along the first arrangement direction are superimposed along the first arrangement direction, and the swelling forces of the plurality of battery cells 20 arranged along the second arrangement direction are superimposed along the second arrangement direction, thereby making the swelling and deformation of the battery cell assembly 110 along the arrangement direction more obvious, and the swelling and deformation of one of the directions with a larger arrangement length will be relatively more obvious than the other direction due to the superposition of more battery cells 20. It should be understood that in the present 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.

[0087] The battery cell assembly 110 is provided with an end plate 50 at each of the opposite ends in the length direction X; thus, the number of end plates 50 is at least two, and at least one end plate 50 is arranged at one end of the battery cell assembly 110 in the length direction X, and at least one end plate 50 is arranged at the opposite end of the battery cell assembly 110. When two or more end plates 50 are arranged at either end of the battery cell assembly 110, the plurality of end plates 50 are arranged in sequence along the length direction X of the battery cell assembly 110.

[0088] The binding member 30 refers to a ring structure that is sleeved on the outer periphery of the battery cell assembly 110 and binds the end plate 50 and the battery cell assembly 110 into one body. The number of binding members 30 can be two, three or any number of more than three; in some embodiments, a plurality of binding members 30 can be arranged in sequence along the height direction Z of the battery cell assembly 110 and sleeved and bound on the battery cell assembly 110 and the end plate 50. The binding member 30 can be, but is not limited to, a steel cable tie, an aluminum alloy cable tie, a plastic cable tie, etc. For example, in some embodiments, the plurality of binding members 30 can all be steel cable ties; or in some other embodiments, at least one of the plurality of binding members 30 can be a steel cable tie, and at least one of the plurality of binding members 30 can be a plastic cable tie.

[0089] The binding member 30 is sleeved on the circumferential wall of the battery monomer assembly 110 along the width direction Y and the end plate 50; thus, the binding member 30 is bound on the end plate 50 at the opposite ends of the battery monomer assembly 110 along the width direction Y and the opposite ends of the battery monomer assembly 110 along the length direction X, and the binding member 30 can bind the end plate 50 at the two ends and the battery monomer assembly 110 between the end plate 50 at the two ends to form an integrated body.

[0090] Optionally, the connection mode of the binding member 30 to the end plate 50 includes but is not limited to the binding member 30 sleeved on the end plate 50, the binding member 30 fixedly connected to the outer surface of the end plate 50, the binding member 30 fixedly inserted into the inner part of the end plate 50, the binding member 30 threaded between the end plate 50 and the battery monomer 20, and the like.

[0091] The width direction Y of the battery monomer assembly 110 refers to a direction perpendicular to the length direction X of the battery monomer assembly 110; it should be understood that the width direction Y of the battery monomer assembly 110 is consistent with the width direction Y of each battery monomer 20.

[0092] The reinforcing member 40 refers to a reinforcing structure for connecting the end plate 50 at the opposite ends of the battery monomer assembly 110 along the length direction X; optionally, the reinforcing member 40 can be but is not limited to a reinforcing structure such as a pressing belt structure, a pressing strip structure, a rib structure, and the like; the material of the reinforcing member 40 can be but is not limited to steel, aluminum alloy, titanium alloy, injection molding, and the like. The number of the reinforcing member 40 can be one, two, or any multiple of two or more.

[0093] The reinforcing member 40 is attached to the end plate 50; optionally, the connection mode of the reinforcing member 40 to the end plate 50 includes but is not limited to the reinforcing member 40 sleeved on the end plate 50, the reinforcing member 40 fixedly connected to the outer surface of the end plate 50, the reinforcing member 40 fixedly inserted into the inner part of the end plate 50, the reinforcing member 40 threaded between the end plate 50 and the battery monomer 20, and the like. For example, the reinforcing member 40 is fixedly connected to the outer surface of the end plate 50, which can be connected to any part of the outer surface of the end plate 50, such as any part of the surface of the battery monomer assembly 110 facing or away from the side surface; the reinforcing member 40 can be stably connected to the end plate 50 by welding, fastener connection, or the like. The end part of the reinforcing member 40 can be folded to form a flange structure for stable connection to the surface of the end plate 50.

[0094] The reinforcing member 40 is arranged at any end of the battery monomer assembly 110 along the height direction Z; optionally, in the height direction Z of the battery monomer assembly 110, any end of the battery monomer assembly 110 can be provided with the reinforcing member 40, such as Figure 3 and Figure 5As shown in FIG. 1, the reinforcing member 40 is arranged at one end of the battery monomer assembly 110 along the height direction Z; or, as shown in FIG. 2, the reinforcing member 40 is arranged at both ends of the battery monomer assembly 110 along the height direction Z. Figure 6 As shown in FIG. 3, the reinforcing member 40 can be arranged around the circumferential wall of the battery monomer assembly 110 along the height direction Z and fixed on the end plate 50; or, as shown in FIG. 4, the reinforcing member 40 can be arranged around the circumferential wall of the battery monomer assembly 110 along the height direction Z and fixed on the end plate 50. Figure 7

[0095] It should be understood that the reinforcing member 40 is arranged at any end of the battery monomer assembly 110 along the height direction Z, while the binding member 30 is arranged around the opposite ends of the battery monomer assembly 110 along the width direction Y; that is, the reinforcing member 40 and the binding member 30 are arranged at different positions of the battery monomer assembly 110, and the reinforcing member 40 and the binding member 30 simultaneously act on the end plates 50 at both ends along the length direction X to provide the binding force; thus, the reinforcing member 40 and the binding member 30 can limit and constrain the battery monomer assembly 110 in different directions, and the stability of the battery monomer assembly 110 is better.

[0096] In the above, the height direction Z of the battery monomer assembly 110 refers to a direction perpendicular to the length direction X of the battery monomer assembly 110; it should be understood that the length direction X, the width direction Y and the height direction Z of the battery monomer assembly 110 are perpendicular to each other, and the height direction Z of the battery monomer assembly 110 is consistent with the height direction Z of each battery monomer 20.

[0097] The reinforcing member 40 includes the avoiding structure 41, which can be, but is not limited to, an opening structure, a slot structure, a through-hole structure, a bending structure, an arc structure, and other structures capable of achieving the avoiding effect. The functional component 24 refers to the electrode terminal 242, the explosion-proof valve 241, and other components capable of achieving a specific function. It can be understood that the avoiding structure 41 is used to avoid the functional component 24 arranged on any end surface of the battery monomer 20 along the height direction Z, so that the functional component 24 is less affected by the reinforcing member 40.

[0098] ​The battery device provided by the embodiments of the present application is characterized in that: after a plurality of battery monomers 20 are arranged to form a battery monomer assembly 110, end plates 50 are arranged at both ends of the battery monomer assembly 110 in the length direction X, and at least two binding members 30 are used to wrap and bind the battery monomer assembly 110, and at any end of the battery monomer assembly 110 in the height direction Z, a reinforcing member 40 is used to attach the end plates 50 at the opposite ends; that is, the reinforcing member 40 and the at least two binding members 30 jointly act on the end plates 50 at both ends of the battery monomer assembly 110 in the length direction X, and the reinforcing member 40 and the at least two binding members 30 can share the expansion force of the battery monomers 20 in the battery monomer assembly 110, thereby effectively reducing the probability of breakage of the binding members 30, improving the stability of the battery monomer assembly 110, and further reducing the probability of the battery monomer assembly 110 losing binding and causing loosening or damage; meanwhile, the reinforcing member 40 can avoid the functional components 24 through the avoiding structure 41, that is, the reinforcing member 40 has a low degree of influence on the functional components 24.

[0099] Please refer to Figure 3 、 Figure 4 and Figure 10 In some embodiments, in the width direction Y of the battery monomer assembly 110, the reinforcing member 40 is located in the middle region of the battery monomer 20.

[0100] In some embodiments, the battery monomer 20 includes an end cover 21, a shell 22, an electrode assembly 23, and other functional components 24.

[0101] The end cover 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery monomer 20 from the external environment. Without limitation, the shape of the end cover 21 can be adapted to the shape of the shell 22 to fit the shell 22. Optionally, the end cover 21 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 21 is not easily deformed when subjected to extrusion and impact, allowing the battery monomer 20 to have higher structural strength and improved reliability. The end cover 21 can be provided with functional components 24 such as electrode terminals 242 and explosion-proof valves 241. The electrode terminals 242 can be used to electrically connect with the electrode assembly 23 for outputting or inputting the electrical energy of the battery monomer 20. In some embodiments, the explosion-proof valve 241 can be provided on the end cover 21. The material of the end cover 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member can also be provided on the inner side of the end cover 21, which can be used to isolate the electrical connection components in the shell 22 from the end cover 21 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0102] 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 arranged in a staggered manner to avoid the risk of direct contact between the reinforcing member 40 and the electrode terminal 242 to cause short circuit. For example, in some embodiments, when the number of electrode terminals 242 is two, the reinforcing member 40 can be arranged between the two electrode terminals 242 and form a gap between the reinforcing member 40 and the two electrode terminals 242, respectively.

[0103] The shell 22 is a component for cooperating with the end cover 21 to form an internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, the electrolyte, and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be provided on the shell 22, and the end cover 21 is made to cover the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 21 and the shell 22 can also be integrated, specifically, the end cover 21 and the shell 22 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the inside of the shell 22, the end cover 21 is made to cover the shell 22. The shell 22 can be various shapes and various sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 22 can be various, for example, the shell 22 can be but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0104] The electrode assembly 23 is a component in which electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 23 can be contained in the shell 22. The electrode assembly 23 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion of active material constituting a main body of the electrode assembly 23, and a portion of the positive electrode sheet and the negative electrode sheet without active material each constitutes a tab 231. The positive and negative tabs can be located together at one end of the main body or at two ends of the main body, respectively. In the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tab 231 connects the electrode terminal 242 to form a current loop.

[0105] wherein the above-mentioned intermediate region refers to a partial region including the explosion-proof valve 241 in the width direction Y of the battery cell assembly 110, or a region between the two electrode terminals 242, or a partial region including any one of the two electrode terminals 242.

[0106] The expansion amount of each battery cell 20 in the battery cell assembly 110 is superimposed along the length direction X. Meanwhile, the expansion process of the battery cell 20 is that the expansion amplitude of the battery cell 20 at the middle part along the length direction X of the battery cell assembly 110 is greater than that of the outer peripheral part. In this way, the reinforcing member 40 is arranged at the middle area of the battery cell assembly 110 along the width direction Y, and the reinforcing member 40 can directly constrain the position with greater expansion amount of the battery cell assembly 110 and provide a binding force, so as to improve the constraint effect of the reinforcing member 40 on the expansion force of the battery cell assembly 110 in cooperation with the end plate 50.

[0107] Please refer to Figure 4 、 Figure 8 and Figure 10 In some embodiments, the functional components 24 include the explosion-proof valve 241 arranged on the same side of the battery cell 20 as the reinforcing member 40 along the height direction Z of the battery cell assembly 110. The avoiding structure 41 is an avoiding opening 411 arranged on the reinforcing member 40, and the explosion-proof valve 241 of each battery cell 20 in the battery cell assembly 110 is communicated with the avoiding opening 411.

[0108] The explosion-proof valve 241 is a pressure relief structure. When the battery cell 20 is in thermal runaway and the internal pressure or temperature reaches a threshold value, the explosion-proof valve 241 will be opened to release the internal pressure, thereby reducing the risk of combustion or explosion of the battery cell 20.

[0109] The avoiding opening 411 is arranged on the reinforcing member 40. Optionally, the avoiding opening 411 can be a through hole arranged at the middle of the reinforcing member 40 along the width direction Y of the battery cell assembly 110. Alternatively, the avoiding opening 411 can also be a notch arranged at any end of the reinforcing member 40 along the width direction Y of the battery cell assembly 110.

[0110] The number of avoiding openings 411 can be one. When the number of avoiding openings 411 is one, the avoiding opening 411 is arranged along the length direction X of the battery cell assembly 110, and the avoiding opening 411 can be communicated with the explosion-proof valve 241 of each battery cell 20 in the battery cell assembly 110.

[0111] Alternatively, the number of the avoidance openings 411 can be two, three, or any multiple of three. Exemplarily, in some embodiments, the number of the avoidance openings 411 can be two or any multiple of two, and each avoidance opening 411 can be in communication with the explosion-proof valves 241 of at least two battery cells 20; thus, the plurality of avoidance openings 411 are sequentially and spaced apart on the reinforcing member 40 along the length direction X of the battery cell assembly 110, and each avoidance opening 411 is in communication with the explosion-proof valves 241 of the plurality of battery cells 20, so that the explosion-proof valves 241 of each battery cell 20 in the battery cell assembly 110 can be communicated to the outside through the corresponding avoidance opening 411. Alternatively, in other embodiments, the number of the avoidance openings 411 can be consistent with the number of the explosion-proof valves 241, the plurality of avoidance openings 411 are sequentially and spaced apart on the reinforcing member 40 along the length direction X of the battery cell assembly 110, and each avoidance opening 411 is in communication with the explosion-proof valve 241 of the corresponding battery cell 20, so as to achieve the avoidance of all the explosion-proof valves 241 in the battery cell assembly 110.

[0112] By opening the avoidance openings 411 on the reinforcing member 40 to communicate with the explosion-proof valves 241 of the battery cells 20 to form the avoidance, the explosion-proof valves 241 can smoothly perform the pressure relief operation in the case of thermal runaway of the battery cells 20, so as to reduce the risk of combustion or explosion of the battery cells 20.

[0113] Please refer to Figure 10 and Figure 11 In some embodiments, in the height direction Z of the battery cell assembly 110, the functional components 24 include the explosion-proof valves 241 and the electrode terminals 242 disposed on the same side of the battery cells 20 as the reinforcing member 40, and the reinforcing member 40 is disposed in a staggered manner with the explosion-proof valves 241 and the electrode terminals 242.

[0114] It can be understood that when the reinforcing member 40 is located on the same side of the battery cells 20 as the explosion-proof valves 241 and the electrode terminals 242, the reinforcing member 40 is disposed in a staggered manner with the explosion-proof valves 241 and the electrode terminals 242; that is, at least part of the explosion-proof valves 241 can be exposed, so that the explosion-proof valves 241 can play a role in pressure relief and exhaust; at the same time, the reinforcing member 40 and the electrode terminals 242 are staggered to form a gap, and the probability of short circuit between the reinforcing member 40 and the electrode terminals 242 is effectively reduced.

[0115] Exemplarily, in some embodiments, the battery cell 20 comprises a shell 22 and an end cover 21 capped on the shell 22, the end cover 21 is provided with an explosion-proof valve 241 and two electrode terminals 242, the explosion-proof valve 241 is located between the electrode terminals 242; the reinforcing member 40 can be bound to the battery cell assembly 110 from one side of the end cover 21 and connected to the end plate 50, the reinforcing member 40 is misaligned with 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 is respectively spaced apart from the two electrode terminals 242, and the reinforcing member 40 does not overlap with the explosion-proof valve 241, and the explosion-proof valve 241 can normally realize the pressure relief and exhaust work.

[0116] In this way, the reinforcing member 40 is misaligned with the explosion-proof valve 241, which can effectively reduce the probability that the reinforcing member 40 blocks the explosion-proof valve 241 and causes the explosion-proof valve 241 to fail.

[0117] Please refer to Figure 10 and Figure 11 In some embodiments, the number of reinforcing members 40 is at least two, the projection of the reinforcing member 40 in the height direction Z of the battery cell assembly 110 is located between the two electrode terminals 242, and at least part of the projection of the explosion-proof valve 241 is located between the adjacent two reinforcing members 40.

[0118] Optionally, the number of reinforcing members 40 can be two, three or any multiple of three or more; the plurality of reinforcing members 40 can be used to connect the end plate and constrain the battery cell assembly 110 at the same time.

[0119] 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, the plurality of 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.

[0120] In the height direction Z of the battery cell assembly 110, at least part of the projection of the explosion-proof valve 241 is located between the adjacent two reinforcing members 40; it should be understood that when the number of reinforcing members 40 is multiple, the plurality of reinforcing members 40 are misaligned with the explosion-proof valve 241, and the plurality of reinforcing members 40 are located on both sides of the explosion-proof valve 241 to constrain the battery cell assembly 110. At the same time, the plurality of reinforcing members 40 can also share the expansion force of the battery cell assembly 110, so that the expansion force received by each reinforcing member 40 is reduced, thereby the width of the reinforcing member 40 can be set smaller to reduce the blocking effect of the reinforcing member 40 on the explosion-proof valve 241.

[0121] Exemplarily, in some embodiments, the battery cell 20 comprises a shell 22 and an end cover 21 capped on the shell 22, the end cover 21 is provided with an explosion-proof valve 241 and two electrode terminals 242, the explosion-proof valve 241 is located between the electrode terminals 242; the number of the reinforcing members 40 can be two, the reinforcing members 40 can be bound to the battery cell assembly 110 from one side of the end cover 21 and connected to the end plate; one of the reinforcing members 40 can be arranged between one of the electrode terminals 242 and the explosion-proof valve 241, and the other reinforcing member 40 can be arranged between the other electrode terminal 242 and the explosion-proof valve 241, so that the reinforcing members 40 can avoid the explosion-proof valve 241 while providing the constraint force, thereby reducing the influence on the explosion-proof valve 241.

[0122] In this way, the reinforcing members 40 can be arranged in a staggered manner between the two electrode terminals 242 to reduce the probability of short circuit between the reinforcing members 40 and the electrode terminals 242; meanwhile, the explosion-proof valve 241 is arranged between the adjacent two reinforcing members 40, which can not only guarantee the constraint force of the reinforcing members 40 on the battery cell assembly 110, but also reduce the probability of the explosion-proof valve 241 being blocked by the reinforcing members 40 and thus being disabled.

[0123] Please refer to Figure 4 and Figure 8 In some embodiments, the reinforcing member 40 is a steel pressing belt.

[0124] Understandably, the steel pressing belt has better tensile strength due to the characteristics of its steel material, so that the steel pressing belt can form a more optimal constraint effect on the battery cell assembly 110. Meanwhile, the probability of the steel pressing belt being broken is also lower.

[0125] In this way, the steel pressing belt is used as the reinforcing member 40 connected to the end plates at opposite ends of the battery cell assembly 110, so that the steel pressing belt can provide greater constraint force and is less likely to be broken.

[0126] Please refer to Figure 4 , Figure 8 and Figure 9 In some embodiments, the surface of the reinforcing member 40 is covered with an insulating structure 60.

[0127] Understandably, the insulating structure 60 is used to insulate and protect the reinforcing member 40, so as to reduce the creepage distance between the reinforcing member 40 and the battery cell 20.

[0128] Alternatively, the insulating structure 60 includes but is not limited to structures with better insulation properties such as insulating sleeves, insulating bands, insulating sheets, etc.; or the insulating structure 60 can also be a layer structure formed by spraying. Exemplarily, the insulating structure 60 can be a ceramic composite belt, a powder spraying layer, mica paper, or other insulating and fire-resistant structures.

[0129] 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.

[0130] 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.

[0131] Please refer to Figure 3 , Figure 4 , Figure 8 and Figure 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.

[0132] 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.

[0133] 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.

[0134] Please refer to Figure 4 , Figure 8 and Figure 9 In some embodiments, the reinforcing member 40 is provided with a support structure 70 on the side facing the battery cell assembly 110.

[0135] The support structure 70 is used to support between the reinforcing member 40 and the battery cell assembly 110. When the reinforcing member 40 is deformed, for example, the long reinforcing member 40 is deformed under its own gravity 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.

[0136] Optionally, the support structure 70 can be connected to the reinforcing member 40 by bonding, fastener connection, etc. One end of the support structure 70 is connected to the reinforcing member 40, and the opposite end of the support structure 70 can abut any battery cell 20 of the battery cell assembly 110, or the opposite end of the support structure 70 can form a gap with the battery cell 20.

[0137] Among them, the support structure 70 can be but not limited to using silicon foam (such as melamine foam, hard rubber, plastic parts) and other hard and insulating materials.

[0138] In some embodiments, the number of support structures 70 can be one, which can be connected to the reinforcing member 40 by bonding, and the support structure 70 can be arranged at the middle section of the reinforcing member 40. Exemplarily, the length of the support structure 70 can be slightly shorter than the length of the reinforcing member 40 along the length direction X of the battery cell assembly 110, so that the support structure 70 can act on most of the area of the reinforcing member 40.

[0139] In other embodiments, the number of support structures 70 can be multiple, for example, two, three or any multiple of more than three, and multiple support structures 70 can be arranged in sequence and connected to the reinforcing member 40 along the length direction X of the battery cell assembly 110; or multiple support structures 70 can be arranged in at least two rows in a direction perpendicular to the length direction X of the battery cell assembly 110, and at least two rows of support structures 70 are arranged in multiple groups in sequence along the length direction X of the battery cell assembly 110. Exemplarily, when the reinforcing member 40 is provided with a relief opening 411, the support structure 70 can be arranged on both sides of the reinforcing member 40 in a direction perpendicular to the length direction X of the battery cell assembly 110, and multiple groups of support structures 70 are arranged in sequence along the length direction X of the battery cell assembly 110.

[0140] In this way, the support structure 70 can be used to support between the reinforcing member 40 and the battery cell 20 to reduce the probability of the reinforcing member 40 deforming and contacting the battery cell 20.

[0141] Please refer to Figures 2 to 4In some embodiments, the battery device 100 further comprises a box 10, and the battery cell assembly 110 is accommodated in the box 10, and one end of the battery cell assembly 110 is connected to the box 10 along the height direction Z and away from the reinforcing member 40.

[0142] Optionally, the battery cell assembly 110 can be connected to the box 10 by adhesion, fastener connection, or the like, so as to improve the stability of the battery cell assembly 110 accommodated in the box 10.

[0143] In the embodiment, the length direction X of the battery cell assembly 110 can be arranged along any direction of the box 10; for example, the length direction X of the battery cell assembly 110 can be arranged along the length direction of the box 10, or the length direction X of the battery cell assembly 110 can be arranged along the width direction of the box 10.

[0144] It should be understood that when the battery cell assembly 110 is connected to the box 10, the end of the battery cell assembly 110 connected to the box 10 can be constrained by the fixed connection with the box 10, that is, the expansion deformation degree of the end of the battery cell assembly 110 connected to the box 10 is small. At the same time, along the height direction Z, the end of the battery cell assembly 110 away from the box 10 is provided with the reinforcing member 40, and the battery cell assembly 110 is constrained by the reinforcing member 40, so that the expansion deformation degree of the end of the battery cell assembly 110 provided with the reinforcing member 40 is also small. In this way, the expansion deformation degree of the battery cell 20 is effectively constrained and reduced.

[0145] In this way, the end of the battery cell assembly 110 along the height direction Z is provided with the reinforcing member 40, and the other end of the battery cell assembly 110 along the height direction Z can be connected to the box 10, so as to realize the purpose of stably assembling the battery cell assembly 110 in the box 10; at the same time, the relative two ends of the battery cell assembly 110 along the height direction Z are respectively constrained by the reinforcing member 40 and the constraint formed by the connection with the box 10, which can effectively form a better constraint effect on the expansion force of the battery cell assembly 110.

[0146] In the following, the battery device 100 provided by the present application will be further described according to specific embodiments.

[0147] Please refer to Figures 1 to 10 In the embodiment, the battery device 100 comprises a box 10, a restraining member, a reinforcing member 40, and a plurality of battery cells 20. The plurality of battery cells 20 can be arranged in sequence along one direction to form at least one battery cell assembly 110, and the relative two ends of the battery cell assembly 110 along the length direction X are both provided with end plates 50.

[0148] Two binding members 30 are sleeved on the battery monomer assembly 110; in this embodiment, the two binding members 30 are both steel belts, and the two steel belts are respectively wrapped around the circumferential side wall of the battery monomer assembly 110 along the width direction Y and are sleeved on the end plates 50 at both ends. One end of the battery monomer assembly 110 along the height direction Z is connected to the box body 10, and the other end of the battery monomer 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 pressing strip. The opposite ends of the steel pressing strip respectively abut against the side surface of the end plate 50 on the side away from the battery monomer assembly 110, and the two ends are locked and connected to the end plate 50 by fasteners.

[0149] The middle part of the steel pressing strip is provided with a avoiding structure 41, for example, an avoiding opening 411 formed by opening, which is used to communicate the explosion-proof valve 241 of each battery monomer 20 in the battery monomer assembly 110. The surface of the steel pressing strip is covered with an insulating structure 60, which can be a ceramic composite tape in this embodiment. The surface of the steel pressing strip is covered with the ceramic composite tape to form an insulating protection for the steel pressing strip. The end of the steel pressing strip facing the battery monomer assembly 110 is provided with a supporting structure 70, which can be a block-shaped silica foam in this embodiment. The silica foam can be bonded to the ceramic composite tape covering the steel pressing strip. The silica foam can support the steel pressing strip and reduce the probability of the steel pressing strip deforming and contacting the battery monomer 20.

[0150] Please refer to Figure 3 , Figure 4 , Figure 8 and Figure 9 , the application also provides a reinforcing member 40 for binding the battery monomer assembly 110. The reinforcing member 40 comprises a first fixed end 42 and a second fixed end 43 for fixing with the battery monomer assembly 110 to be bound; between the first fixed end 42 and the second fixed end 43, the reinforcing member 40 comprises an avoiding structure 41 for avoiding the functional components 24 of the battery monomer assembly 110 to be bound.

[0151] The first fixed end 42 is a flange structure formed by bending at one end of the reinforcing member 40 along the length direction X of the battery monomer assembly 110. Similarly, the second fixed end 42 is a flange structure formed by bending at the other end of the reinforcing member 40 along the length direction X of the battery monomer assembly 110. The first fixed end 42 and the second fixed end 43 respectively form a large-area abutment with the corresponding end plate 50 to reduce the risk of stress concentration.

[0152] The reinforcing member 40 provided by the application can bind the battery monomer assembly 110 at any end along the height direction Z of the battery monomer assembly 110 to improve the stability of the battery monomer assembly 110.

[0153] Please refer to Figure 4 , Figure 8 and Figure 9 In some embodiments, the surface of the reinforcement 40 is covered with an insulating structure 60.

[0154] In this way, the insulating protection capability of the reinforcement 40 is improved by covering the surface of the reinforcement 40 with the insulating structure 60, so as to ensure the electrical clearance and creepage distance between the reinforcement 40 and the battery monomer assembly 110 to be bound, and also to reduce the probability of short circuit.

[0155] Please refer to Figure 4 , Figure 8 and Figure 9 In some embodiments, the side of the reinforcement 40 facing the battery monomer assembly 110 is provided with a support structure 70.

[0156] In this way, the support structure 70 can be used to support between the reinforcement 40 and the battery monomer assembly 110 to be bound, so as to reduce the probability of the reinforcement 40 deforming to contact the battery monomer assembly 110 to be bound.

[0157] Please refer to Figure 1 and Figure 2 The embodiments of the present application also provide a power storage device 1000, which comprises the battery device 100 as described above, and the battery device 100 is used to store or provide electric energy.

[0158] The embodiments of the present application provide a power storage device 1000, which comprises one or more battery clusters to improve the voltage and capacity of the power storage device 1000. The battery cluster can comprise a plurality of battery devices 100, and the plurality of battery devices 100 are connected in series through a busbar component to improve the voltage of the power storage device 1000. When the power storage device 1000 comprises a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the power storage device 1000.

[0159] The power storage device 1000 can be used in a power storage power station, a wind power generation system, a solar power generation system, a mobile power system or a temporary power supply system, etc. The power storage device 1000 can store electric energy as needed and output electric energy at an appropriate time. For example, the power storage device 1000 can store electric energy at a low electricity consumption valley, and provide electric energy for related users or electric equipment at a high electricity consumption peak. The power storage system provided by the embodiments of the present application can be any power system that needs to use the power storage device 1000.

[0160] In some embodiments, the power storage device 1000 is a power storage container or a power storage cabinet.

[0161] In some embodiments, the power storage device 1000 can comprise a cabinet body and one or more battery clusters, and the battery clusters are accommodated in the cabinet body 1100.

[0162] In some embodiments, the energy storage device 1000 can include a thermal management module, a master control module, a general control module, a power distribution module, a fire control module, and the like.

[0163] As an example, the thermal management module can include a liquid cooling unit that provides cooling liquid to each battery device 100 through a pipeline for adjusting the temperature of the battery monomer 20.

[0164] As an example, the master control module can serve as a battery management unit of the battery cluster for monitoring and managing the battery cluster. The master control module can monitor information such as current, voltage, power, or temperature of the battery cluster. For example, the charging and discharging current, voltage, and the like of the battery cluster can be controlled. The master control module includes a slave battery management unit SBMU (SBMU), a fusion switch, and the like.

[0165] As an example, the general control module can serve as a battery management unit of the energy storage device 1000 for monitoring and managing the energy storage device 1000. The general control module can monitor information such as current, voltage, power, state of charge, or temperature of the energy storage device 1000. For example, the charging and discharging current, voltage, and the like of the energy storage device 1000 can be controlled. As an example, the general control module includes an insulation monitoring module IMM (IMM), a master battery management unit MBMU (MBMU), an Ethernet ETH (ETH), and an optical fiber conversion module, and the like.

[0166] As an example, the fire control module includes a control panel, a detector, an alarm device, and the like for detecting, alarming, or extinguishing the energy storage system.

[0167] As an example, the power distribution module can be used to distribute power to modules that need power in the energy storage device 1000.

[0168] The energy storage device 1000 provided by the embodiments of the present application includes the above-mentioned battery device 100, and in the case that the probability of the battery monomer assembly 110 of the above-mentioned battery device 100 being loose or damaged is low, the probability of the energy storage device 1000 being damaged is also low.

[0169] Please refer to Figure 1 and Figure 2 In some embodiments, the energy storage device 1000 includes a cabinet 1100, and the length direction X of the battery monomer assembly 110 is the width direction of the cabinet 1100.

[0170] In this way, the length direction X of the battery cell assembly 110 is arranged along the width direction of the cabinet 1100, so that the battery cell assembly 110 can be arranged more closely in the cabinet 1100, thereby improving the space utilization of the cabinet 1100.

[0171] 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 the height direction of the cabinet 1100 to meet different assembly requirements.

[0172] Please refer to Figure 1 and Figure 12 The embodiment of the present application also provides a power storage system 2000, which comprises a power conversion device 2100 and the power storage device 1000 as described above, and the power conversion device 2100 is used to electrically connect a power generation device 2200 and the power storage device 1000.

[0173] In some embodiments, the power storage system 2000 can comprise one or more power storage devices 1000 and the power conversion device 2100, and the power conversion device 2100 is used to connect between the power generation device 2200 and the power storage device 1000. The power generation device 2200 is used to generate electric energy, and the electric energy generated by the power generation device 2200 can be stored into the power storage device 1000 through the power conversion device 2100. As an example, the power generation device 2200 can be a solar panel, a water power generation device 2200, a fire power generation device 2200, a wind power generation device 2200, etc. The specific type of the power generation device 2200 is not limited in the present application.

[0174] The power storage system 2000 provided by the embodiment of the present application comprises the power storage device 1000 as described above, so that the stability of the power storage system 2000 is better.

[0175] Please refer to Figure 1 , Figure 12 and Figure 13 The embodiment of the present application also provides a charging network 3000, which comprises a charging pile and the power storage device 1000 as described above or the power storage system 2000 as described above, and the power storage device 1000 is used to provide electric energy for the charging pile.

[0176] The embodiment of the present application provides a charging network 3000, which comprises a charging pile 3100 and a power storage device 1000, and the charging pile 3100 is electrically connected with the power storage device 1000, and the power storage device 1000 is used to provide electric energy for the charging pile 3100. The charging pile 3100 is electrically connected with the battery device 100 in the power storage device 1000 through a cable, and the battery device 100 can provide the electric energy stored by itself to the charging pile 3100. The charging pile 3100 has one or more connectors 3110, and the connector 3110 is used to be connected with an electric device (such as a vehicle), so that the electric device can be charged.

[0177] The energy storage device 1000 can be located inside the charging pile 3100 (for example, a charging and storage integrated machine), or outside the charging pile 3100.

[0178] The charging network 3000 provided by the embodiments of the present application includes the energy storage device 1000 or the energy storage system 2000 described above, so that the stability of the charging network 3000 is more optimal.

[0179] The above are only preferred embodiments of the present application, and are not used to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the protection scope of the present 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; 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 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 1 or 2, characterized in that: 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 in that: 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 according to claim 4, characterized in that: 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 in that: The reinforcing member is a steel pressure strip.

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

8. The battery device according to claim 7, characterized in that: 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 in that: 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 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.

11. A reinforcing member, characterized in that: 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 reinforcing member according to claim 11, characterized in that: The surface of the reinforcing member is covered with an insulating structure.

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

14. An energy storage device, characterized in that: 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 according to claim 14, 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.

16. An energy storage system, characterized in that: 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 in that: It includes a charging pile and an energy storage device as described in claim 14 or 15 or an energy storage system as described in claim 16, wherein the energy storage device is used to provide electrical energy to the charging pile.

Images