Battery device and electric device

Abstract

The application relates to the technical field of battery structure, and provides a battery device and a power utilization device, the battery device comprising a concrete frame body and a plurality of battery monomers, a concrete side wall of the concrete frame body comprising a concrete structure part and a reinforcing member arranged in the interior of the concrete structure part, the concrete structure part having a first wall and a second wall, the first wall abutting against corresponding end portions of a battery monomer assembly along a first direction, a plurality of first reinforcing portions of the reinforcing member being arranged in the second wall on at least one side, and the first reinforcing portions extending into two first walls connected with each other; the battery device provided by the embodiment of the application can be used for simultaneously locating the first reinforcing portions in the first walls on opposite sides and the second wall on at least one side, thereby helping to improve the overall bending stiffness and strength of the first wall and the second wall, so that the concrete frame body can effectively resist the expansion effect of the battery monomers and has a relatively low probability of damage.

Description

Technical Field

[0001] This application relates to the field of battery structure technology, and in particular to a battery device and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] A battery assembly comprises multiple individual battery cells, which are grouped together. These cells are typically bound together with end plates using restraints to accommodate the expansion forces of the individual cells. However, this binding method results in relatively low structural strength, and the restraints used to bind the battery cells may break when the cells expand. Summary of the Invention

[0004] The purpose of this application is to provide a battery device and an electrical device, which aims to solve the problem of low structural strength in the related art of bundling and binding battery cell components.

[0005] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0006] In a first aspect, embodiments of this application provide a battery device, including a concrete frame and a plurality of battery cells, the plurality of battery cells being arranged sequentially along a first direction to form a battery cell assembly; the concrete frame includes concrete side walls, the concrete side walls surrounding the battery cell assembly and forming a receiving cavity, the battery cell assembly being housed within the receiving cavity; the concrete side walls include a concrete structural portion and a reinforcing member disposed inside the concrete structural portion, the concrete structural portion having two first walls disposed opposite to each other along the first direction and two second walls disposed opposite to each other along a second direction, the first walls being connected to the second walls, and along the first direction, the first walls abutting against corresponding ends of the battery cell assembly; the reinforcing member includes a plurality of first reinforcing portions, the first reinforcing portions being disposed within at least one side of the second wall, and the first reinforcing portions extending into the two first walls connected to the second walls, the plurality of first reinforcing portions being arranged sequentially along a third direction; wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

[0007] The beneficial effects of the embodiments of this application are as follows: The battery device provided in this application accommodates a battery cell assembly within a cavity formed by a concrete side wall, and the first walls on both sides abut against the corresponding ends of the battery cell assembly in a first direction to form a restraint. A first reinforcing part can be located simultaneously within the first walls on both sides and at least one second wall on one side. The first reinforcing part connects the first walls on both sides and the second wall between them to form a whole, thus helping to improve the overall bending stiffness of the first and second walls, thereby enhancing the stability and overall strength of the concrete side wall structure. Simultaneously, the first reinforcing part can provide additional rigidity and strength, and can effectively distribute the force exerted on the first wall by the battery cell due to expansion along the first direction, thereby effectively reducing the shear force concentration on the first wall and lowering the probability of damage to the first wall. Thus, when the battery cell assembly is restrained by a concrete frame, the concrete frame with superior structural strength can effectively resist the expansion of the battery cell, and the probability of damage to the concrete frame is low.

[0008] In some embodiments, the first reinforcing portion includes a second reinforcing section and first reinforcing sections disposed at opposite ends of the second reinforcing section; the second reinforcing section is disposed within a second wall on a corresponding side, and the first reinforcing sections are respectively disposed within a first wall on a corresponding side.

[0009] By adopting the above technical solution, the second reinforcing section is set in the second wall on the corresponding side and strengthens the second wall. At the same time, the first reinforcing section connected to the second reinforcing section is set in the first wall on the corresponding side and strengthens the first wall. The second reinforcing section and the first reinforcing sections at opposite ends can also improve the overall strength of the first wall between the second wall and the second walls at both ends, thereby effectively reducing the probability of the concrete side wall breaking or being damaged.

[0010] In some embodiments, the first reinforcing portion includes two first reinforcing segments disposed opposite to each other along a first direction and two second reinforcing segments disposed opposite to each other along a second direction, wherein the opposite ends of the first reinforcing segments are respectively connected to the corresponding second reinforcing segments; the first reinforcing segments and the second reinforcing segments are sequentially connected to form a ring structure; wherein the two first reinforcing segments are respectively disposed in the corresponding first wall and the two second reinforcing segments are respectively disposed in the corresponding second wall.

[0011] By adopting the above technical solution, two second reinforcing sections are respectively set in the second wall on the corresponding side to strengthen the second wall, and two first reinforcing sections are respectively set in the first wall on the corresponding side to strengthen the first wall; at the same time, the first reinforcing sections and the second reinforcing sections are connected in sequence to form a ring structure. In this way, the first reinforcing sections and the second reinforcing sections can be used to improve the overall strength of the first wall and the second wall, thereby improving the overall strength of the concrete side wall.

[0012] In some embodiments, the reinforcing member further includes a second reinforcing portion disposed inside at least one of the first wall and the second wall; the second reinforcing portion is connected to a plurality of first reinforcing portions.

[0013] By adopting the above technical solution, multiple first reinforcing parts are connected by the second reinforcing part, which can further improve the overall strength of the reinforcing part, thereby improving the overall strength of the concrete side wall. As a result, the concrete side wall has a better ability to bind the battery cell assembly and resist the expansion of the battery cell.

[0014] In some embodiments, the concrete frame further includes an abutment, at least a portion of which is disposed on the side surface of the first wall facing the receiving cavity, the abutment being used to abut against a battery cell.

[0015] By adopting the above technical solution, the abutment is set on the surface of the first wall and replaces the first wall in contact with the battery cell. This can effectively reduce the probability of wear on the battery cell when the rough surface of the concrete material of the first wall comes into contact with the battery cell assembly.

[0016] In some embodiments, the abutment is integrally formed with the first wall; or, the abutment is connected to the side surface of the first wall facing the receiving cavity.

[0017] By adopting the above technical solution, the abutment can be fixedly installed by integrally molding with the first wall to improve the installation stability of the abutment; or, the abutment can be directly connected to the surface of the first wall to achieve the purpose of the abutment replacing the first wall to abut against the battery cell assembly.

[0018] In some embodiments, the concrete frame further includes a connector having a connection hole; the connector is disposed inside at least one of the first wall and the second wall, and the connection hole penetrates the connector and the concrete structure in a third direction; the first direction, the second direction and the third direction are perpendicular to each other.

[0019] By adopting the above technical solution, by setting the connector inside at least one of the first wall and the second wall and making the connection hole penetrate the connector and the concrete structure in a third direction, the connection hole of the connector can be used for external fasteners to lock, thereby improving the stability of the connection between the concrete frame and the external fasteners.

[0020] In some embodiments, the concrete frame further includes a concrete bottom wall that covers one end of the concrete side wall along a third direction, and the concrete bottom wall and the concrete side wall together enclose a receiving cavity; the first direction, the second direction and the third direction are perpendicular to each other.

[0021] By adopting the above technical solution, the concrete bottom wall is sealed to one end of the concrete side wall along the third direction, and the two first walls and two second walls of the concrete side wall are connected to form a whole by the concrete bottom wall. This can further improve the overall structural strength of the concrete frame, and thus further improve the ability of the concrete frame to bind the battery cell assembly and resist the expansion of the battery cell.

[0022] In some embodiments, the concrete frame further includes a heat exchange component connected to the concrete bottom wall and exchanging heat with the battery cell assembly.

[0023] By adopting the above technical solution, the heat exchange component is connected to the concrete bottom wall, and heat exchange is formed between the heat exchange component and the battery cell assembly. This can regulate the operating temperature of the battery cell assembly, thereby improving the performance of the battery cell assembly and reducing the probability of thermal runaway of the battery cell assembly.

[0024] In some embodiments, the heat exchange component includes a heat exchange section and an interface section disposed on the heat exchange section, wherein a heat exchange flow channel is formed in the heat exchange section and the interface section communicates with the heat exchange flow channel; wherein the heat exchange section is disposed on the side surface of the concrete bottom wall facing the cavity; or, the heat exchange section is integrally formed inside the concrete bottom wall and the interface section is exposed outside the concrete bottom wall.

[0025] By adopting the above technical solution, the heat exchange section is set on the surface of the concrete bottom wall facing the cavity, or the heat exchange section is integrally formed inside the concrete bottom wall. The heat exchange medium is circulated into the heat exchange channel of the heat exchange section through the exposed interface, so as to achieve the heat exchange effect of the heat exchange section on the battery cell assembly.

[0026] In some embodiments, the concrete frame further includes a protective member, at least a portion of which is disposed on a side surface of the concrete bottom wall facing the cavity, the protective member being used to contact the battery cell assembly.

[0027] By adopting the above technical solution, protective components are used to replace the concrete base wall and come into contact with the battery cell assembly. This can effectively reduce the probability of the rough surface of the concrete base wall causing wear to the battery cells in the battery cell assembly.

[0028] In some embodiments, the protective element is integrally formed with the concrete base wall; or, the protective element is attached to the side surface of the concrete base wall facing the cavity.

[0029] By adopting the above technical solutions, the protective component can be fixed to the concrete bottom wall in an integral molding manner, which can improve the stability of the protective component; or, the protective component can be directly set on the side surface of the concrete bottom wall facing the cavity, so as to achieve the purpose of the protective component contacting the battery cell assembly.

[0030] In some embodiments, the protective component is a thermally conductive structural component.

[0031] By adopting the above technical solutions, the heat-conducting structural components can effectively improve the heat exchange efficiency between the heat exchange components and the battery cell assembly.

[0032] In some embodiments, the interface portion is disposed outside the receiving cavity.

[0033] By adopting the above technical solution, the interface is placed outside the receiving cavity, which can reduce the impact of the interface on the housing of the battery cell assembly.

[0034] In some embodiments, the concrete base wall and the concrete side walls are integrally formed structures.

[0035] By adopting the above technical solution, the concrete frame formed by the integrally molded concrete bottom wall and concrete side wall has better structural strength and stability.

[0036] In some embodiments, the concrete frame is a cement concrete frame.

[0037] By adopting the above technical solutions, the structural strength of the cement concrete frame is better, thus the cement concrete frame has a better restraining effect on the battery cell module and a better ability to resist the expansion of the battery cell module.

[0038] Secondly, embodiments of this application also provide an electrical device, which includes a battery device as described above, and the battery device is used to provide electrical energy.

[0039] The beneficial effects of the embodiments of this application are as follows: The electrical device provided in the embodiments of this application includes the above-mentioned battery device, thus the reliability of the electrical device is better. Attached Figure Description

[0040] 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.

[0041] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0042] Figure 2 An exploded view of the battery device provided in the embodiments of this application;

[0043] Figure 3 This is an exploded structural diagram of a battery cell provided in an embodiment of this application;

[0044] Figure 4 An exploded view of the concrete frame provided in the embodiments of this application;

[0045] Figure 5 An exploded view of a concrete sidewall provided in an embodiment of this application;

[0046] Figure 6 An exploded view of another concrete sidewall provided in this application embodiment;

[0047] Figure 7 This is a top view of the concrete frame provided in an embodiment of this application.

[0048] The following are the labeling elements in the figure:

[0049] 1000, vehicles;

[0050] 100. Battery assembly; 200. Controller; 300. Motor;

[0051] 10. Box; 11. First box; 12. Second box;

[0052] 20. Battery cell; 210. Battery cell assembly; 21. End cap; 21a. Electrode terminal; 22. Housing; 23. Electrode assembly; 23a. Tab;

[0053] 30. Concrete frame; 31. Concrete sidewall; 310. Receiving cavity; 311. Concrete structural part; 3111. First wall; 3112. Second wall; 312. Reinforcing member; 3121. First reinforcing part; 3121a. First reinforcing section; 3121b. Second reinforcing section; 3122. Second reinforcing part; 32. Abutting member; 33. Connecting member; 331. Connecting hole; 34. Concrete bottom wall; 35. Heat exchange component; 351. Heat exchange part; 352. Interface part;

[0054] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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 widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in industrial equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0060] A battery assembly comprises multiple individual battery cells, which are grouped together. These cells are typically bound together with end plates using restraints to accommodate their expansion forces. However, this binding method has relatively low structural strength. The restraints used to bind the cells may break when the cells expand, leading to loosening of the cells and ultimately battery assembly failure, thus affecting the reliability of the battery system.

[0061] Based on the above considerations, to address the issue of low structural strength in the binding and securing methods of battery cell modules in related technologies, a battery device is designed. This device utilizes a cavity formed by a surrounding concrete sidewall to house the battery cell module. The concrete sidewall includes a concrete structural section and reinforcing members. A portion of the first reinforcing member is disposed within the second wall of at least one side of the concrete structural section, and the first reinforcing member extends along a first direction to both ends into the first walls on opposite sides. Thus, the first reinforcing member connects the first walls on opposite sides and the second wall between them to form a whole, thereby improving the overall bending stiffness of the first and second walls and enhancing the stability and overall strength of the concrete sidewall structure. Simultaneously, the first reinforcing member provides additional rigidity and strength and effectively distributes the force exerted on the first wall by the battery cell due to expansion along the first direction, thereby effectively reducing shear force concentration on the first wall and lowering the probability of damage. Therefore, when using a concrete frame to bind the battery cell module, the concrete frame, with its superior structural strength, can effectively resist the expansion of the battery cell, and the probability of damage to the concrete frame is low.

[0062] The battery device disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements. Electrical devices can be, but are not limited to, power tools, electric vehicles, electric construction machinery, electric vehicles, ships, spacecraft, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0063] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0064] Please refer to Figure 1 , Figure 1 This is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be an engineering vehicle (e.g., a truck, excavator, crane, tractor, etc.), a fuel-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. In some embodiments, the battery device 100 can also be used as a counterweight for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power requirements of the vehicle 1000 during startup, navigation, and driving.

[0065] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0066] Please refer to Figure 2 , Figure 2 This 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 210 for providing voltage and capacity. The battery cell assembly 210 may include a plurality of battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0067] In some embodiments, the battery cell assembly 210 is typically formed by arranging a plurality of battery cells 20.

[0068] As an example, the battery cell assembly 210 can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0069] In some embodiments, the battery device may be a battery pack, which includes a housing 10 and one or more battery cell assemblies 210, the battery cell assemblies 210 being housed in the housing 10.

[0070] As an example, the battery cell assembly 210 can be a battery module, and the battery cell assembly 210 can be housed in the housing 10 by fixing the battery module in the housing 10.

[0071] As an example, the battery cell assembly 210 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 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 to house the battery cell assembly 210. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 11 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 210.

[0074] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0075] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 20, such as electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0076] 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 the battery cell has been discharged by recharging to activate the active materials.

[0077] 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.

[0078] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit that makes up a battery device. For example... Figure 3 The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0079] 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 housing 22. Optionally, end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed when subjected to compression and impact, so that battery cell 20 can have higher structural strength and improved safety performance. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used to electrically connect with electrode assembly 23 for outputting or inputting electrical energy of battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as 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.

[0080] 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 copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0081] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The housing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrode sheets without active material each constitute a tab 23a. 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 device 100, active ions (e.g., lithium ions) reversibly insert and extract between the positive and negative electrode sheets to achieve charging and discharging. The tabs 23a connect to the electrode terminals 21a to form a current loop.

[0082] According to some embodiments of this application, please refer to Figures 4 to 6This application provides a battery device 100, including a concrete frame 30 and a plurality of battery cells 20. The plurality of battery cells 20 are arranged sequentially along a first direction X to form a battery cell assembly 210. The concrete frame 30 includes a concrete side wall 31, which surrounds the battery cell assembly and forms a receiving cavity 310, in which the battery cell assembly 210 is housed. The concrete side wall 31 includes a concrete structural portion 311 and a reinforcing member 312 disposed inside the concrete structural portion 311. The concrete structural portion 311 has two first reinforcing members 312 disposed opposite to each other along the first direction X. The first wall 3111 and two second walls 3112 are arranged opposite each other along the second direction Y. The first wall 3111 is connected to the second wall 3112. Along the first direction X, the first wall 3111 abuts against the corresponding end of the battery cell assembly 210. The reinforcing member 312 includes a plurality of first reinforcing parts 3121. The first reinforcing parts 3121 are disposed in at least one side of the second wall 3112. The first reinforcing parts 3121 extend into the two first walls 3111 connected to the second wall 3112. Along the third direction Z, the plurality of first reinforcing parts 3121 are arranged in sequence. The first direction X is perpendicular to the second direction Y.

[0083] The concrete frame 30 refers to a frame structure made of concrete used to enclose and restrain the battery cell assembly 210.

[0084] The concrete frame 30 includes concrete side walls 31; the concrete side walls 31 refer to structures used to surround the periphery of the battery cell assembly 210 and to form an abutment and restraint on the end of the battery cell assembly 210 along the first direction X. It should be understood that the concrete side walls 31 are arranged in a ring shape, so that the internal space formed by the circumferential arrangement of the concrete side walls 31 can serve as a receiving cavity 310 for accommodating the battery cell assembly 210. The battery cell assembly 210 is assembled into the receiving cavity 310 to achieve the restraining effect of the concrete side walls 31 on the battery cell assembly 210.

[0085] Optionally, the concrete sidewall 31 may be, but is not limited to, a polygonal ring structure such as a circular ring structure or a rectangular ring structure. For example, in some embodiments, the concrete sidewall 31 may be arranged to form a rectangular ring structure, and the receiving cavity 310 formed inside the concrete sidewall 31 may also be a rectangular region.

[0086] Here, the first direction X refers to the arrangement direction of the multiple battery cells 20. It should be understood that the multiple battery cells 20 can be arranged sequentially along the first direction X. Taking a battery cell 20 with a rectangular block structure as an example, the thickness direction of the battery cell 20 is aligned with the first direction X, so that adjacent battery cells 20 are attached to each other on their larger surfaces. Simultaneously, if a battery cell 20 expands, it mainly expands along the electrode lamination direction of the internal electrode assembly 23, that is, in the direction of the larger surface area of ​​the battery cell 20. When multiple battery cells 20 are arranged sequentially with their larger surfaces attached to each other, the expansion direction of the battery cell 20 is towards the first direction X.

[0087] The concrete sidewall 31 includes a concrete structural component 311 and a reinforcing member 312. The concrete structural component 311 refers to a composite material structure in which aggregates are bound together by a cementing material. Depending on the cementing material, concrete can include cement concrete, gypsum concrete, silicate concrete, water glass concrete, asphalt concrete, polymer concrete, etc. For example, cement concrete uses cement as a cementing material, sand and gravel as aggregates, and water (which may contain admixtures and additives) in a certain proportion, and is obtained by mixing. Concrete structures have a simple manufacturing process, low cost, and high structural strength and weight.

[0088] The concrete structure 311 has two first walls 3111 arranged opposite each other along a first direction X and two second walls 3112 arranged opposite each other along a second direction Y; thereby, the two opposite ends of the two first walls 3111 arranged along the first direction X are respectively connected to the two second walls 3112 arranged along the second direction Y to form an annular concrete structure 311.

[0089] The second direction Y refers to a direction perpendicular to the first direction X; in some embodiments, taking a battery cell 20 with a rectangular block structure as an example, the second direction Y can be the width direction of the battery cell 20.

[0090] It should be understood that when the battery cell assembly 210 is housed in the receiving cavity 310, the two first walls 3111 arranged along the first direction X can abut against the corresponding ends of the battery cell assembly 210; thus, the concrete structure 311 can bind the battery cell assembly 210 through the two first walls 3111 at opposite ends. When the battery cell 20 in the battery cell assembly 210 expands, the first walls 3111 can provide support to the battery cell assembly 210 to prevent the battery cell 20 from expanding along the first direction X.

[0091] The reinforcing member 312 refers to a reinforcing structural member used to improve the strength, bending resistance, and tensile properties of the concrete structural part 311. Optionally, the reinforcing member 312 may be, but is not limited to, a steel bar structure, a wire mesh structure, a steel strip structure, etc.

[0092] The reinforcing member 312 is disposed inside the concrete structural portion 311; it should be understood that the reinforcing member 312 can be integrally cast into the concrete structural portion 311 by a casting process. Exemplarily, in some embodiments, the reinforcing member 312 can be first placed in a mold for casting, and then concrete slurry can be poured into the mold to cover the reinforcing member 312; after the concrete slurry solidifies to form the concrete structural portion 311, the reinforcing member 312 is integrally formed inside the concrete structural portion 311.

[0093] The reinforcing member 312 includes a plurality of first reinforcing parts 3121; the first reinforcing parts 3121 refer to reinforcing structural members used to improve the strength, bending resistance and tensile properties of the concrete structural part 311. Optionally, the first reinforcing parts 3121 may be, but are not limited to, steel bar structures, wire mesh structures, steel strip structures, etc.

[0094] The first reinforcing part 3121 is partially disposed within the second wall 3112 on at least one side, and the other part of the first reinforcing part 3121 is disposed within the first walls 3111 on opposite sides. Thus, the first reinforcing part 3121 can pass through the second wall 3112 on at least one side and simultaneously be located within the first walls 3111 on opposite sides. The first reinforcing part 3121 can improve the overall bending stiffness of the first walls 3111 on opposite sides and the second walls 3112 connected to the first walls 3111, thereby improving the stability and overall strength of the concrete side wall 31. This can further enhance the binding effect of the first walls 3111 on the battery cell assembly 210 and reduce the probability of cracking or damage to the concrete side wall 31.

[0095] Optionally, the number of first reinforcing parts 3121 can be any number of two, three, or more. In this way, multiple first reinforcing parts 3121 can be arranged sequentially along the third direction Z, and multiple first reinforcing parts 3121 can work together to reinforce the concrete structure 311. This can further improve the ability of the concrete side wall 31 to resist the expansion of the battery cell 20, and the probability of damage to the concrete side wall 31 when used to restrain the battery cell assembly 210 is lower.

[0096] For example, in some embodiments, a plurality of first reinforcing parts 3121 may be distributed in a third direction Z and at equal intervals inside the concrete structure part 311; in this way, the plurality of first reinforcing parts 3121 distributed at equal intervals can effectively distribute the expansion force of the battery cell 20 on the first wall 3111 to the entire first wall 3111, thereby effectively reducing the risk of local instability or damage.

[0097] Here, the aforementioned third direction Z refers to a direction that is simultaneously perpendicular to the first direction X and the second direction Y. In some embodiments, the third direction Z may be parallel to the height direction of the block-shaped battery cell 20 housed within the receiving cavity 310.

[0098] Optionally, the first reinforcing part 3121 can be a steel strip structure, and a portion of the steel strip structure can be disposed within the second wall 3112 on either side, and the opposite ends of the steel strip structure can extend into the corresponding first wall 3111; or, the first reinforcing part 3121 can be a wire mesh structure, and a portion of the wire mesh structure can be disposed within the second wall 3112 on either side, and the other portions of the wire mesh structure are disposed within the two first walls 3111 at opposite ends.

[0099] For example, in some embodiments, the first reinforcing part 3121 may adopt a steel strip structure, which includes a middle section and end sections disposed at opposite ends of the middle section. The middle section and the end sections at opposite ends may generally form a U-shaped structure. In this way, the middle section is disposed inside one of the second walls 3112, and the end sections at opposite ends are disposed inside the first walls 3111 on the corresponding sides. Thus, the first reinforcing part 3121 can act simultaneously on the first walls 3111 at opposite ends and one of the second walls 3112 to improve the overall stability and overall strength of the concrete side wall 31, and reduce the probability of the concrete structure 311 breaking or breaking when the first wall 3111 binds the battery cell assembly 210.

[0100] Optionally, in this embodiment, the number of first reinforcing parts 3121 can be one or more. For example, when there are multiple first reinforcing parts 3121, two first reinforcing parts 3121 are used as an example. One first reinforcing part 3121 is disposed in one of the second walls 3112 and the two opposite first walls 3111, and the other first reinforcing part 3121 can be disposed in the other second wall 3112 and the two opposite first walls 3111. In this way, by using two first reinforcing parts 3121, the overall structural stability and overall strength of the concrete side wall 31 can be further improved, and the bending resistance of the concrete side wall 31 can be improved, thereby further reducing the probability of the concrete structure 311 breaking or being damaged when the first wall 3111 binds the battery cell assembly 210.

[0101] Alternatively, in some other embodiments, the first reinforcing part 3121 can be a steel strip structure, which can be ring-shaped. In this way, the steel strip structure can pass through the first wall 3111 and the second wall 3112 in sequence and be located inside the two first walls 3111 and the two second walls 3112 at the same time. In this way, the first reinforcing part 3121 can act on the two first walls 3111 and the two second walls 3112 at opposite ends at the same time, so as to improve the overall stability and overall strength of the concrete side wall 31 and reduce the probability of the concrete structure part 311 breaking or breaking when the first wall 3111 binds the battery cell assembly 210.

[0102] The battery device 100 provided in this application embodiment accommodates a battery cell assembly 210 within a receiving cavity 310 formed by a concrete side wall 31 surrounding it. In the first direction X, the first walls 3111 on both sides abut against corresponding ends of the battery cell assembly 210 to form a restraint. A first reinforcing portion 3121 can be simultaneously located within the first walls 3111 on both sides and within at least one second wall 3112. The first reinforcing portion 3121 connects the first walls 3111 on both sides and the second wall 3112 between them to form a whole, thus improving the overall integrity of the first walls 3111 and the second wall 3112. The flexural stiffness enhances the overall stability and strength of the concrete sidewall 31. Simultaneously, the first reinforcing part 3121 provides additional rigidity and strength, effectively distributing the force exerted on the first wall 3111 by the battery cell 20 due to expansion along the first direction X. This effectively reduces shear force concentration on the first wall 3111, lowering the probability of damage. Thus, when the concrete frame 30 restrains the battery cell assembly 210, the structurally stronger concrete frame 30 effectively resists the expansion of the battery cell 20, and the probability of damage to the concrete frame 30 is low.

[0103] Please refer to Figure 4 and Figure 5 In some embodiments, the first reinforcing part 3121 includes a second reinforcing section 3121b and first reinforcing sections 3121a disposed at opposite ends of the second reinforcing section 3121b; the second reinforcing section 3121b is disposed in the second wall 3112 on the corresponding side, and the first reinforcing sections 3121a are respectively disposed in the first wall 3111 on the corresponding side.

[0104] The first reinforcing part 3121 includes a first reinforcing section 3121a and a second reinforcing section 3121b; it can be understood that the first reinforcing section 3121a refers to a section of the first reinforcing part 3121 disposed within the first wall 3111, and the second reinforcing section 3121b refers to the other end of the first reinforcing part 3121 disposed within the second wall 3112.

[0105] Optionally, the first reinforcing segment 3121a and the second reinforcing segment 3121b may include, but are not limited to, plate structures, rib structures, mesh structures, strip structures, etc.; wherein, the configurations of the first reinforcing segment 3121a and the second reinforcing segment 3121b may be the same or different.

[0106] The first reinforcing sections 3121a are provided at opposite ends of the second reinforcing section 3121b; optionally, the first reinforcing sections 3121a can be connected to form a whole by means of bonding, welding, snap-fit ​​connection, integral molding, etc. It should be understood that since the first wall 3111 and the second wall 3112 are two adjacent wall structures, the first wall 3111 and the second wall 3112 should be intersecting; therefore, the first reinforcing sections 3121a and the second reinforcing sections 3121b respectively provided in the first wall 3111 and the second wall 3112 are also intersecting.

[0107] For example, in some embodiments, the first reinforcing part 3121 may be a steel strip structure, and the steel strip structure is bent at two points to form a second reinforcing section 3121b distributed thereon and a first reinforcing section 3121a located at opposite ends of the second reinforcing section 3121b.

[0108] The number of first reinforcing parts 3121 can be one; or the number of first reinforcing parts 3121 can be two, three or more.

[0109] For example, when there are multiple first reinforcing parts 3121, at least one second reinforcing segment 3121b of the first reinforcing part 3121 can be disposed in the second wall 3112 at one end in the second direction Y, and at least one second reinforcing segment 3121b of the other first reinforcing part 3121 can be disposed in the second wall 3112 at the other end in the second direction Y; the overall structural strength of the concrete side wall 31 can be further improved by using multiple first reinforcing parts 3121.

[0110] With this configuration, the second reinforcing section 3121b is installed within the second wall 3112 on the corresponding side and reinforces the second wall 3112. At the same time, the first reinforcing section 3121a, which is connected to the second reinforcing section 3121b, is installed within the first wall 3111 on the corresponding side and reinforces the first wall 3111. Furthermore, the second reinforcing section 3121b and the first reinforcing sections 3121a at opposite ends can also improve the overall strength of the first wall 3111 between the second wall 3112 and the second walls 3112 at both ends, thereby effectively reducing the probability of the concrete side wall 31 cracking or breaking.

[0111] Please refer to Figure 4 and Figure 6 In some embodiments, the first reinforcing part 3121 includes two first reinforcing segments 3121a disposed opposite to each other along the first direction X and two second reinforcing segments 3121b disposed opposite to each other along the second direction Y. The opposite ends of the first reinforcing segments 3121a are respectively connected to the corresponding second reinforcing segments 3121b. The first reinforcing segments 3121a and the second reinforcing segments 3121b are sequentially connected to form a ring structure. The two first reinforcing segments 3121a are respectively disposed in the corresponding first wall 3111, and the two second reinforcing segments 3121b are respectively disposed in the corresponding second wall 3112.

[0112] In this embodiment, the first reinforcing part 3121 includes two first reinforcing segments 3121a disposed opposite to each other along the first direction X; thus, the two first reinforcing segments 3121a can be respectively disposed in the first wall 3111 along the first direction X and located on the same side.

[0113] Meanwhile, the first reinforcing part 3121 also includes two second reinforcing segments 3121b disposed opposite each other along the second direction Y; thus, the two second reinforcing segments 3121b can be disposed in the second wall 3112 located on the same side along the second direction Y.

[0114] The two ends of the first reinforcing segment 3121a are respectively connected to the corresponding second reinforcing segment 3121b; thus, the first reinforcing segment 3121a and the second reinforcing segment 3121b can be connected in sequence and enclosed to form a ring structure.

[0115] Thus, the first reinforcing segment 3121a and the second reinforcing segment 3121b, which are connected to form a ring structure, can work together to reinforce the first wall 3111 and the second wall 3112, and help to further improve the overall bending stiffness of the first wall 3111 and the second wall 3112; when the first wall 3111 is subjected to the force generated by the expansion of the battery cell 20, the probability of the first wall 3111 and the second wall 3112 breaking or breaking is lower.

[0116] Please refer to Figures 4 to 6 In some embodiments, the reinforcing member 312 further includes a second reinforcing part 3122, which is disposed inside at least one of the first wall 3111 and the second wall 3112; the second reinforcing part 3122 is connected to a plurality of first reinforcing parts 3121.

[0117] The second reinforcing part 3122 refers to a reinforcing structural member used to improve the strength, bending resistance, and tensile properties of the concrete structural part 311. Optionally, the second reinforcing part 3122 may be, but is not limited to, a steel bar structure, a wire mesh structure, a steel strip structure, etc.

[0118] The second reinforcing part 3122 is connected to a plurality of first reinforcing parts 3121; optionally, the second reinforcing part 3122 may be connected to a portion of the plurality of first reinforcing parts 3121; or, the second reinforcing part 3122 may be connected to all of the first reinforcing parts 3121 at the same time.

[0119] The number of second reinforcing parts 3122 can be one, two, or more than two; when there are multiple second reinforcing parts 3122, the number of first reinforcing parts 3121 connected to each second reinforcing part 3122 can be the same or different.

[0120] The second reinforcing part 3122 is disposed inside at least one of the first wall 3111 and the second wall 3112; optionally, the second reinforcing part 3122 may be disposed only inside the first wall 3111 and used to connect with the first reinforcing part 3121 inside the first wall 3111; or, the second reinforcing part 3122 may be disposed only inside the second wall 3112 and used to connect with the first reinforcing part 3121 inside the second wall 3112; or, the second reinforcing part 3122 may be disposed inside both the first wall 3111 and the second wall 3112, and the second reinforcing part 3122 is used to connect the first reinforcing part 3121 inside the first wall 3111 and to connect the first reinforcing part 3121 inside the second wall 3112.

[0121] Understandably, the arrangement direction of the second reinforcing part 3122 intersects with the arrangement direction of the first reinforcing part 3121, thus enabling the second reinforcing part 3122 to simultaneously connect with multiple first reinforcing parts 3121. For example, in some embodiments, the first reinforcing parts 3121 can be sequentially arranged in a ring along a first direction X and a second direction Y to form a ring structure, while the second reinforcing parts 3122 can be arranged along a third direction Z; thus, the second reinforcing part 3122 can simultaneously intersect with and connect with multiple first reinforcing parts 3121.

[0122] The connection method between the first reinforcing part 3121 and the second reinforcing part 3122 can be, but is not limited to, welding, fastener fastening, or binding. By interlacing and connecting the first reinforcing part 3121 and the second reinforcing part 3122 to form a whole, and then placing the first reinforcing part 3121 and the second reinforcing part 3122 in a mold for casting, and then pouring concrete slurry into the mold to cover the first reinforcing part 3121 and the second reinforcing part 3122, after the concrete slurry has solidified to form the concrete structure part 311, the first reinforcing part 3121 and the second reinforcing part 3122 will be integrally formed inside the concrete structure part 311.

[0123] With this configuration, multiple first reinforcing parts 3121 are connected by the second reinforcing part 3122, which can further improve the overall strength of the reinforcing member 312, thereby improving the overall strength of the concrete side wall 31. As a result, the concrete side wall 31 has a better ability to bind the battery cell assembly 210 and resist the expansion of the battery cell 20, and the probability of the concrete side wall 31 breaking or being damaged under the action of expansion force is lower.

[0124] Please refer to Figures 4 to 6 In some embodiments, the concrete frame 30 further includes an abutment 32, at least a portion of which is disposed on the side surface of the first wall 3111 facing the cavity 310, and the abutment 32 is used to abut against the battery cell 20.

[0125] The abutment 32 refers to a structural component disposed on the first wall 3111 and used to abut against the battery cell 20.

[0126] Optionally, the abutment 32 may be, but is not limited to, a plate structure (e.g., a metal plate, a plastic plate, etc.), a film structure (e.g., a silicon carbide film, a polyurethane film, a tempered film, etc.), or a coating structure (e.g., a ceramic coating, a polyester coating, etc.).

[0127] At least a portion of the abutment 32 is disposed on the side surface of the first wall 3111 facing the cavity 310; optionally, the abutment 32 may be disposed on the side surface of the first wall 3111 facing the cavity 310, for example, a coating structure may be formed on the surface of the first wall 3111 by spraying or coating, or a film layer structure may be adhered to the surface of the first wall 3111; or, the abutment 32 may be embedded in the first wall 3111, with a portion of the abutment 32 exposed on the side surface of the first wall 3111 facing the cavity 310.

[0128] For example, in some embodiments, the abutment 32 is a metal end plate (e.g., a steel plate) as an example. The abutment 32 can be embedded in the first wall 3111 and partially exposed on the side surface of the first wall 3111 facing the receiving cavity 310. When the battery cell assembly 210 is assembled in the receiving cavity 310, the abutment 32 provided on the first wall 3111 can abut against the battery cell 20 located at the end of the battery cell assembly 210 in the first direction X, and the probability of the first wall 3111 contacting the battery cell 20 is low.

[0129] Understandably, since the first wall 3111 of the concrete structure 311 is a composite material structure formed by cementing aggregates into a whole, the surface of the first wall 3111 is relatively rough, and there are many burrs and dust particles on the surface of the first wall 3111. When the surface of the first wall 3111 directly comes into contact with the battery cell 20 in the battery cell assembly 210, the surface of the first wall 3111 is prone to causing scratches, wear and other risks to the battery cell 20.

[0130] With this configuration, the abutment 32 is placed on the surface of the first wall 3111 and abuts against the battery cell 20 instead of the first wall 3111. This can effectively reduce the probability of wear on the battery cell 20 when the rough surface of the concrete material of the first wall 3111 abuts against the battery cell assembly 210.

[0131] It should be understood that when the concrete side wall 31 restrains the battery cell assembly 210, it mainly restrains the battery cell assembly 210 in the first direction X by abutting against the first wall 3111. Therefore, the probability of the concrete side wall 31 contacting the battery cell 20 in the battery cell assembly 210 in the second direction Y is low; therefore, it is only necessary to provide the abutting member 32 to the first wall 3111.

[0132] Please refer to Figures 4 to 6 In some embodiments, the abutment 32 is integrally formed with the first wall 3111; or, the abutment 32 is connected to the side surface of the first wall 3111 facing the cavity 310.

[0133] In this embodiment, the abutment 32 can be integrally formed with the first wall 3111. It can be understood that the abutment 32 and the first wall 3111 can be integrally formed by casting the first wall 3111 of the concrete structure 311 and the abutment 32 together through a casting process.

[0134] For example, in some embodiments, the specific operation of integrally forming the abutment 32 with the first wall 3111 can be as follows: the abutment 32 and the reinforcing member 312 are fixedly set in a mold for casting operation, and then concrete slurry is poured into the mold. After the concrete slurry solidifies, a concrete structure 311 is formed. At this time, the reinforcing member 312 will be integrally formed inside the concrete structure 311, and the abutment 32 will be integrally embedded in the first wall 3111, with a portion of the abutment 32 exposed on the side surface of the first wall 3111 facing the receiving cavity 310.

[0135] Alternatively, the abutment 32 is connected to the side surface of the first wall 3111 facing the inside of the receiving cavity 310; optionally, the abutment 32 can be assembled to the side surface of the first wall 3111 facing the inside of the receiving cavity 310 by means of bonding, embedding connection or other methods; or, the abutment 32 can also be coated by spraying or coating to form a coating structure on the side surface of the first wall 3111 facing the inside of the receiving cavity 310.

[0136] With this configuration, the abutment 32 can be fixedly installed by integrally forming it with the first wall 3111 to improve the installation stability of the abutment 32; or, the abutment 32 can be directly connected to the surface of the first wall 3111 to achieve the purpose of the abutment 32 replacing the first wall 3111 to abut against the battery cell assembly 210.

[0137] Please refer to Figures 4 to 6 In some embodiments, the concrete frame 30 further includes a connector 33 having a connection hole 331; the connector 33 is disposed inside at least one of the first wall 3111 and the second wall 3112, and the connection hole 331 penetrates the connector 33 and the concrete structure 311 along the third direction Z; the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0138] Connector 33 refers to a structural component used for locking and connecting to external structures (such as bolts, screws, and other fasteners).

[0139] Optionally, the connector 33 may be, but is not limited to, a rod structure, a block structure, a plate structure, a support structure, etc.; the number of connectors 33 may be one or more.

[0140] The connector 33 has a connecting hole 331, which is used for insertion and connection of external structures. Optionally, the connecting hole 331 can be a threaded hole, which can be locked into the threaded hole using a bolt, screw or other threaded connection structure; or, the connector can also be a plug hole, which can be fixedly assembled into the plug hole using a rivet, expansion screw or the like.

[0141] The connector 33 is disposed inside at least one of the first wall 3111 and the second wall 3112; optionally, the connector 33 may be disposed inside the first wall 3111; or, the connector 33 may be disposed inside the second wall 3112; or, the connector 33 may be disposed inside both the first wall 3111 and the second wall 3112.

[0142] For example, in some embodiments, connectors 33 may be provided in the first walls 3111 at opposite ends along the first direction X, and the number of connectors 33 in each first wall 3111 may be multiple, with multiple connectors 33 distributed sequentially and spaced apart in the first walls 3111 along the second direction Y; thus, the connectors 33 provided in the first walls 3111 are used for fasteners such as bolts and screws to be fastened, which facilitates the connection and assembly of the concrete frame 30 and the corresponding battery cell assembly 210.

[0143] Understandably, the connector 33 is disposed inside at least one of the first wall 3111 and the second wall 3112 by means of integral casting. The connector 33, the reinforcing member 312 and the abutment member 32 are assembled in a mold for casting, and then concrete slurry is poured into the mold. After the concrete slurry solidifies, a concrete structural part 311 is formed. At this time, the connector 33 will be integrally formed in the first wall 3111 and / or the second wall 3112 of the concrete structural part 311.

[0144] The connecting hole 331 penetrates the connector 33 and the concrete structure 311 along the third direction Z. Optionally, the two opposite ends of the connector 33 can be set to be exposed along the third direction Z on the first wall 3111 or the second wall 3112 of the concrete structure 311, so that the connecting hole 331 can be directly connected to the outside. Alternatively, the two opposite ends of the connector 33 can be set inside the first wall 3111 or the second wall 3112, and through holes can be formed in the first wall 3111 or the second wall 3112, so that the connecting hole 331 on the connector 33 can be connected to the outside through the through holes.

[0145] For example, in some embodiments, the connector 33 may be a rod-shaped metal structural member, such as a steel pipe, and the rod-shaped connector 33 has a connecting hole 331, such as a threaded hole, through it in the third direction Z. In this way, the rod-shaped connector 33 can be integrally formed in the first wall 3111 and / or the second wall 3112 of the concrete structure 311 by a casting process, and both ends of the connector 33 in the third direction Z can be exposed in the concrete structure 311, so as to achieve a locking connection to the connecting hole 331.

[0146] With this configuration, by placing the connector 33 inside at least one of the first wall 3111 and the second wall 3112 and having the connection hole 331 pass through the connector 33 and the concrete structure 311 in the third direction Z, the connection hole 331 of the connector 33 can be used to lock the external fasteners, thereby improving the stability of the concrete frame 30 when connected to the external fasteners.

[0147] Please refer to Figures 4 to 7 In some embodiments, the concrete frame 30 further includes a concrete bottom wall 34, which covers one end of the concrete side wall 31 along the third direction Z. The concrete bottom wall 34 and the concrete side wall 31 together enclose and form a receiving cavity 310; the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0148] The concrete base wall 34 refers to the wall structure used to support the battery cell assembly 210 along the third direction Z.

[0149] Among them, the concrete base wall 34 refers to a composite material structure in which aggregates are bound together by a cementing material. Depending on the cementing material, concrete can include cement concrete, gypsum concrete, silicate concrete, water glass concrete, asphalt concrete, polymer concrete, etc. For example, cement concrete uses cement as a cementing material, sand and gravel as aggregates, and water (which may contain admixtures and additives) in a certain proportion, and is obtained by mixing. Concrete structures have a simple construction process, low cost, and high structural strength and weight.

[0150] The concrete bottom wall 34 covers one end of the concrete side wall 31 along the third direction Z; optionally, the connection between the concrete bottom wall 34 and the concrete side wall 31 can be formed by casting the concrete bottom wall 34 and the concrete side wall 31 into one piece through a casting process; or, the concrete bottom wall 34 and the concrete side wall 31 can be cast separately, and then the concrete bottom wall 34 and the concrete side wall 31 can be connected by means of adhesive bonding, coating a concrete slurry layer and curing to form a continuous whole to form a fixed assembly.

[0151] With this configuration, the concrete bottom wall 34 is sealed over one end of the concrete side wall 31 along the third direction Z. The concrete bottom wall 34 connects the two first walls 3111 and the two second walls 3112 in the concrete structural part 311 of the concrete side wall 31 to form a whole. This can further improve the overall structural strength of the concrete frame 30, thereby further improving the ability of the concrete frame 30 to restrain the battery cell assembly 210 and resist the expansion of the battery cell 20. Moreover, the probability of the concrete frame 30 cracking or being damaged is lower.

[0152] Please refer to Figure 4 and Figure 7 In some embodiments, the concrete frame 30 further includes a heat exchange component 35, which is connected to the concrete bottom wall 34 and exchanges heat with the battery cell assembly 210.

[0153] Understandably, heat exchange component 35 refers to a structural component capable of generating a heating or cooling effect.

[0154] Optionally, the heat exchange component 35 may be, but is not limited to, a heat exchange plate (e.g., a water-cooled plate, a condenser plate), a heating wire, a heating rod, or other structures. By forming a heat exchange with the battery cell assembly 210 through the heat exchange component 35, the heating or cooling effect of the battery cell assembly 210 can be achieved.

[0155] The heat exchange component 35 is connected to the concrete base wall 34. Optionally, the heat exchange component 35 can be disposed on the surface of the concrete base wall 34, for example, on the surface facing the receiving cavity 310. The heat exchange component 35 can be fixedly assembled to the surface of the concrete base wall 34 by means of bonding, embedding, or other methods. When the battery cell assembly 210 is housed within the receiving cavity 310, the battery cell assembly 210 can directly contact the heat exchange component 35 and form a heat exchange.

[0156] Alternatively, the heat exchange component 35 can be disposed inside the concrete bottom wall 34, for example, by integrally casting it into the concrete bottom wall 34. In this way, the heat exchange component 35 can exchange heat with the battery cell assembly 210 within the housing cavity 310 through the concrete bottom wall 34.

[0157] With this configuration, the heat exchange component 35 is connected to the concrete bottom wall 34, and the heat exchange component 35 is used to exchange heat with the battery cell assembly 210. This can regulate the operating temperature of the battery cell assembly 210, thereby improving the performance of the battery cell assembly 210 and reducing the probability of thermal runaway of the battery cell assembly 210.

[0158] Please refer to Figure 4 and Figure 7In some embodiments, the heat exchange component 35 includes a heat exchange portion 351 and an interface portion 352 disposed on the heat exchange portion 351. A heat exchange flow channel (not shown in the figure) is formed in the heat exchange portion 351, and the interface portion 352 communicates with the heat exchange flow channel. The heat exchange portion 351 is disposed on the side surface of the concrete bottom wall 34 facing the cavity 310. Alternatively, the heat exchange portion 351 is integrally formed inside the concrete bottom wall 34, and the interface portion 352 is exposed outside the concrete bottom wall 34.

[0159] The heat exchange component 35 includes a heat exchange section 351 and an interface section 352; wherein, a heat exchange flow channel is formed within the heat exchange section 351, which refers to a flow channel structure for circulating the heat exchange medium. Optionally, the heat exchange medium includes, but is not limited to, hot water, heat exchange oil, phase change material medium, etc.

[0160] The interface section 352 is connected to the heat exchange channel; thus, the heat exchange medium can be circulated from the interface section 352 into the heat exchange channel, and the heat exchange medium can be used to achieve heat exchange with the battery cell assembly 210 by flowing in the heat exchange channel.

[0161] In this embodiment, the heat exchange part 351 can be integrally formed inside the concrete bottom wall 34, and the interface part 352 is exposed outside the concrete bottom wall 34. It is understood that the heat exchange part 351 can be set inside the concrete bottom wall 34 by casting process. In specific operation, the heat exchange part 351 of the heat exchange component 35 can be set in the mold for casting, and the interface of the heat exchange component 35 is located outside the mold. Concrete slurry is poured into the mold. After the concrete slurry solidifies, it forms the concrete bottom wall 34, and the heat exchange part 351 is integrally formed inside the concrete bottom wall 34, while the interface part 352 can be located outside the concrete bottom wall 34.

[0162] Alternatively, in this embodiment, the heat exchange part 351 can be disposed on the side surface of the concrete bottom wall 34 facing the cavity 310; optionally, the heat exchange part 351 can be fixedly assembled to the surface of the concrete bottom wall 34 by means of bonding, embedding connection, fastener locking connection, etc.

[0163] It should be understood that when the receiving cavity 310 is used to house the battery cell assembly 210, the battery cell assembly 210 can directly contact the heat exchange section 351 and form heat exchange. At the same time, the heat exchange section 351 can also replace the surface of the concrete bottom wall 34 and be used to support the battery cell assembly 210, which can effectively reduce the probability of wear of the battery cells 20 in the battery cell assembly 210.

[0164] With this configuration, the heat exchange section 351 is integrally formed inside the concrete bottom wall 34, and the heat exchange medium is circulated into the heat exchange channel of the heat exchange section 351 through the exposed interface section 352, so that the heat exchange section 351 can achieve the heat exchange effect of the battery cell assembly 210.

[0165] Please refer to Figure 4 and Figure 7 In some embodiments, the concrete frame 30 also includes a protective element (not shown) at least partially disposed on the side surface of the concrete bottom wall 34 facing the cavity 310, the protective element being for contacting the battery cell assembly 210.

[0166] The protective component refers to the structural component installed on the concrete base wall 34 and used to contact the battery cell 20 in the battery cell assembly 210.

[0167] Optionally, the protective component may be, but is not limited to, a plate structure (such as a metal plate, plastic plate, etc.), a membrane structure (such as a silicon carbide membrane, polyurethane membrane, tempered glass membrane, etc.), or a coating structure (such as a ceramic coating, polyester coating, etc.).

[0168] Optionally, when the heat exchange section 351 is integrally formed inside the concrete bottom wall 34, the protective member can be provided on the side surface of the concrete bottom wall 34 facing the cavity 310. For example, a coating structure can be formed on the surface of the concrete bottom wall 34 by spraying or coating, or a film structure can be bonded to the surface of the concrete bottom wall 34; or, the protective member can be embedded in the concrete bottom wall 34, with part of the protective member exposed on the side surface of the concrete bottom wall 34 facing the cavity 310.

[0169] For example, in some embodiments, the protective member is a metal end plate (e.g., a steel plate). The protective member can be embedded in the concrete bottom wall 34 and partially exposed on the side surface of the concrete bottom wall 34 facing the receiving cavity 310. When the battery cell assembly 210 is assembled in the receiving cavity 310, the protective member provided on the concrete bottom wall 34 can be used to support the multiple battery cells 20 in the battery cell assembly 210, and the probability of the concrete bottom wall 34 coming into contact with the battery cells 20 is low.

[0170] Alternatively, when the heat exchange section 351 is disposed on the side of the concrete bottom wall 34 facing the cavity, the protective member can be disposed on the side of the concrete bottom wall 34 facing the cavity 310 and cover the heat exchange section 351. Optionally, the protective member can be connected to the heat exchange section 351 by means of bonding, fastener connection, or other methods.

[0171] Furthermore, the protective component can also cover the portion of the concrete bottom wall 34 exposed to the heat exchange section 351, thereby reducing the probability of the battery cell 20 directly contacting the relatively rough concrete bottom wall 34.

[0172] In this way, the heat exchange section 351 can be covered and protected by protective components to reduce the risk of collision damage when the heat exchange section 351 comes into direct contact with the battery cell 20; at the same time, it can also reduce the probability of the concrete bottom wall 34 causing wear to the battery cell 20.

[0173] Understandably, since the concrete base wall 34 is a composite material structure formed by cementing aggregates into a whole, its surface is relatively rough and contains many burrs and dust particles. When the surface of the concrete base wall 34 comes into direct contact with the battery cell 20 in the battery cell assembly 210, the surface of the concrete base wall 34 is prone to causing scratches, wear, and other risks to the battery cell 20.

[0174] With this configuration, the protective component is placed on the surface of the concrete base wall 34 and replaces the concrete base wall 34 in contact with the battery cell 20. This can effectively reduce the probability of wear on the battery cell 20 when the rough surface of the concrete material of the concrete base wall 34 is used to support the battery cell assembly 210.

[0175] In some embodiments, the protective member is integrally formed with the concrete base wall 34; or, the protective member is attached to the side surface of the concrete base wall 34 facing the cavity 310.

[0176] In this embodiment, the protective component can be integrally formed with the concrete base wall 34. It can be understood that the protective component and the concrete base wall 34 can be integrally formed by a casting process, whereby the formed concrete base wall 34 and the protective component are cast together.

[0177] For example, in some embodiments, the specific operation of integrally forming the protective member with the concrete bottom wall 34 can be as follows: the protective member is fixedly set in a mold for pouring, and then concrete slurry is poured into the mold. After the concrete slurry solidifies, the concrete bottom wall 34 is formed. At this time, the protective member is integrally embedded in the concrete bottom wall 34, and part of the protective member is exposed on the side surface of the concrete bottom wall 34 facing the receiving cavity 310.

[0178] Alternatively, the protective component is connected to the side surface of the concrete bottom wall 34 facing the cavity 310; optionally, the protective component can be assembled to the side surface of the concrete bottom wall 34 facing the cavity 310 by means of bonding, embedding, or other methods; or, the abutment component 32 can be formed with a coating structure on the side surface of the concrete bottom wall 34 facing the cavity 310 by spraying or coating.

[0179] With this configuration, the protective component can be fixed in place by integrally forming it with the concrete base wall 34, thereby improving the stability of the installation; or, the protective component can be directly connected to the surface of the concrete base wall 34, so that the abutment 32 can replace the concrete base wall 34 to support the battery cell assembly 210.

[0180] In some embodiments, the protective component is a thermally conductive structural component.

[0181] It should be understood that thermally conductive structural components refer to components with superior thermal conductivity.

[0182] In this embodiment, the protective component can be a thermally conductive structural component; optionally, the thermally conductive structural component can be, but is not limited to, a metal plate, a thermally conductive adhesive layer, a thermally conductive coating, or other structural components.

[0183] With this configuration, the protective component adopts a heat-conducting structural component, so that the protective component can not only achieve the effect of the abutment component 32 replacing the concrete bottom wall 34 to support the battery cell assembly 210, but also improve the heat exchange efficiency of the heat exchange component 35 for the battery cell assembly 210.

[0184] Please refer to Figure 4 and Figure 7 In some embodiments, the interface portion 352 is disposed outside the receiving cavity 310.

[0185] In this embodiment, when the heat exchange part 351 is disposed on the side surface of the concrete bottom wall 34 facing the cavity 310, the interface part 352 can also be disposed outside the cavity 310; thus, the impact of the interface part 352 on the space occupied by the cavity 310 can be effectively reduced.

[0186] Understandably, the method of setting the heat exchange part 351 on the side surface of the concrete bottom wall 34 facing the cavity 310 and setting the interface part 352 outside the cavity 310 can be achieved by first connecting and fixing the heat exchange part 351 to the surface of the concrete bottom wall 34, then using a mold to cast the concrete side wall 31 onto the concrete bottom wall 34 and connecting it to the concrete bottom wall 34 to form an integral unit, while the interface part 352 can be set outside the casting range of the concrete side wall 31, thus achieving the purpose of setting the interface part 352 outside the cavity 310.

[0187] With this configuration, placing the interface portion 352 outside the receiving cavity 310 can reduce the impact of the receiving portion 352 on the receiving of the battery cell assembly 210.

[0188] Please refer to Figure 4 and Figure 7 In some embodiments, the concrete bottom wall 34 and the concrete side wall 31 are integrally formed structures.

[0189] In this embodiment, the concrete bottom wall 34 and the concrete side wall 31 can be formed into an integral structure through a casting process.

[0190] For example, the specific steps for integrally casting the concrete bottom wall 34 and the concrete side wall 31 can be as follows: the reinforcing member 312, the abutting member 32, and the connecting member 33 included in the concrete side wall 31 are placed at corresponding positions in the mold for casting, and the heat exchange component 35 is placed at the position corresponding to the formation of the concrete bottom wall 34. Then, concrete slurry is poured into the mold. After the concrete slurry solidifies, the concrete bottom wall 34 and the concrete side wall 31 integrally formed with the reinforcing member 312, the abutting member 32, the connecting member 33, and the heat exchange component 35 are formed.

[0191] With this configuration, the concrete frame 30 formed by the integrally molded concrete bottom wall 34 and concrete side walls 31 has better structural strength and stability.

[0192] Please refer to Figures 4 to 7 In some embodiments, the concrete frame 30 is a cement concrete frame 30.

[0193] In this embodiment, the concrete frame 30 can be a cement concrete frame 30, that is, the concrete side walls 31 and the concrete bottom wall 34 included in the concrete frame 30 can both be formed by pouring cement concrete slurry.

[0194] With this configuration, the structural strength of the cement concrete frame 30 is better, the restraining effect of the cement concrete frame 30 on the battery cell module 210 is better, and the ability of the cement concrete frame 30 to resist the expansion of the battery cell module 210 is better.

[0195] The battery device 100 provided in this application will now be further described according to specific embodiments.

[0196] Please refer to Figure 4 , Figure 6 and Figure 7 In this embodiment, the battery device 100 includes a concrete frame 30 and a plurality of battery cells 20, which are arranged sequentially along the first direction X to form a battery cell assembly 210.

[0197] The concrete frame 30 includes concrete side walls 31 and a concrete bottom wall 34. The concrete frame 30 includes concrete side walls 31, which surround the battery cell assembly 210 and form a receiving cavity 310, in which the battery cell assembly 210 is housed. The concrete side walls 31 include a concrete structural portion 311 and a reinforcing member 312 disposed inside the concrete structural portion 311. The concrete structural portion 311 has two first walls 3111 disposed opposite each other along a first direction X and two second walls 3112 disposed opposite each other along a second direction Y. The first walls 3111 and the second walls 3112 are connected. Along the first direction X, the first walls 3111 abut against the corresponding ends of the battery cell assembly 210.

[0198] The reinforcing member 312 includes a first reinforcing part 3121 and a second reinforcing part 3122; the first reinforcing part 3121 includes two first reinforcing segments 3121a arranged opposite each other along a first direction X and two second reinforcing segments 3121b arranged opposite each other along a second direction Y, and the opposite ends of the first reinforcing segments 3121a are respectively connected to the corresponding second reinforcing segments 3121b; the first reinforcing segments 3121a and the second reinforcing segments 3121b are connected in sequence to form a ring structure; wherein, the two first reinforcing segments 3121a are respectively disposed in the corresponding first wall 3111, and the two second reinforcing segments 3121b are respectively disposed in the corresponding second wall 3112.

[0199] There are multiple first reinforcing parts 3121; in this embodiment, two first reinforcing parts 3121 are used as an example for explanation. The two first reinforcing parts 3121 can be arranged at intervals along the third direction Z; wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0200] The second reinforcing part 3122 is disposed inside at least one of the first wall 3111 and the second wall 3112; in this embodiment, the first reinforcing part 3121 can be disposed in both the first wall 3111 and the second wall 3112 simultaneously. Each second reinforcing part 3122 is connected to both first reinforcing parts 3121. In this embodiment, both the first reinforcing part 3121 and the second reinforcing part 3122 can be made of steel strip structure; thus, the first reinforcing part 3121 and the second reinforcing part 3122 can be connected to form a frame structure and used to reinforce the concrete structural part 311.

[0201] The concrete frame 30 also includes an abutment member 32, at least a portion of which is disposed on the side surface of the first wall 3111 facing the cavity 310. The abutment member 32 is used to contact the battery cell 20. In this embodiment, the abutment member 32 can be an end plate made of steel or plastic, and the abutment member 32 can be integrally cast onto the first wall 3111.

[0202] The concrete frame 30 also includes a connector 33. In this embodiment, the connector 33 can be a steel pipe structure. A connecting hole 331 is provided through the interior of the steel pipe connector 33 along the third direction Z. The connector 33 can be disposed inside the first wall 3111, and the connecting hole 331 is exposed outside the first wall 3111 of the concrete structure 311 along the third direction Z.

[0203] The concrete bottom wall 34 covers one end of the concrete side wall 31 along the third direction Z, and the concrete bottom wall 34 and the concrete side wall 31 together form a receiving cavity 310.

[0204] The concrete frame 30 also includes a heat exchange component 35, which is connected to the concrete bottom wall 34 and exchanges heat with the battery cell assembly 210.

[0205] Please refer to Figure 1 , Figure 2 and Figure 4 This application embodiment also provides an electrical device, which includes a battery device 100 as described above, and the battery device 100 is used to provide electrical energy.

[0206] The electrical device provided in this application embodiment is, for example, the vehicle 1000 described above; the electrical device includes the battery device 100 described above, thus the reliability of the electrical device is better.

[0207] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that: include Multiple battery cells are arranged sequentially along a first direction to form a battery cell assembly. as well as A concrete frame includes concrete side walls surrounding a battery cell assembly and forming a receiving cavity within which the battery cell assembly is housed. The concrete side walls include a concrete structural portion and reinforcing members disposed within the concrete structural portion. The concrete structural portion has two first walls disposed opposite each other along a first direction and two second walls disposed opposite each other along a second direction. The first walls are connected to the second walls, and along the first direction, the first walls abut against corresponding ends of the battery cell assembly. The reinforcing members include a plurality of first reinforcing portions disposed within at least one of the second walls, and extending into the two first walls connected to the second walls. Along a third direction, the plurality of first reinforcing portions are arranged sequentially. The first direction, the second direction, and the third direction are perpendicular to each other.

2. The battery device according to claim 1, characterized in that: The first reinforcing part includes a second reinforcing section and a first reinforcing section disposed at opposite ends of the second reinforcing section; the second reinforcing section is disposed within the second wall on the corresponding side, and the first reinforcing section is disposed within the first wall on the corresponding side.

3. The battery device according to claim 1, characterized in that: The first reinforcing part includes two first reinforcing segments arranged opposite each other along the first direction and two second reinforcing segments arranged opposite each other along the second direction, with the opposite ends of the first reinforcing segments respectively connected to the corresponding second reinforcing segments; the first reinforcing segments and the second reinforcing segments are connected in sequence to form a ring structure; The two first reinforcing segments are respectively disposed in the corresponding first wall, and the two second reinforcing segments are respectively disposed in the corresponding second wall.

4. The battery device according to any one of claims 1 to 3, characterized in that: The reinforcing member further includes a second reinforcing portion disposed inside at least one of the first wall and the second wall; the second reinforcing portion is connected to a plurality of the first reinforcing portions.

5. The battery device according to any one of claims 1 to 3, characterized in that: The concrete frame also includes an abutment member, at least a portion of which is disposed on the side surface of the first wall facing the cavity, the abutment member being used to abut against the battery cell.

6. The battery device according to claim 5, characterized in that: The abutment is integrally formed with the first wall; or, the abutment is connected to the side surface of the first wall facing the cavity.

7. The battery device according to any one of claims 1 to 3 and 6, characterized in that: The concrete frame also includes a connector having a connection hole; the connector is disposed inside at least one of the first wall and the second wall, and the connection hole penetrates the connector and the concrete structure along a third direction; the first direction, the second direction and the third direction are perpendicular to each other.

8. The battery device according to any one of claims 1 to 3 and 6, characterized in that: The concrete frame also includes a concrete bottom wall, which covers one end of the concrete side wall along a third direction. The concrete bottom wall and the concrete side wall together enclose the cavity. The first direction, the second direction, and the third direction are perpendicular to each other.

9. The battery device according to claim 8, characterized in that: The concrete frame also includes a heat exchange component, which is connected to the bottom wall of the concrete and exchanges heat with the battery cell assembly.

10. The battery device according to claim 9, characterized in that: The heat exchange component includes a heat exchange section and an interface section disposed on the heat exchange section. A heat exchange flow channel is formed in the heat exchange section, and the interface section communicates with the heat exchange flow channel. The heat exchange section is disposed on the side surface of the concrete bottom wall facing the cavity; or, the heat exchange section is integrally formed inside the concrete bottom wall, and the interface section is exposed outside the concrete bottom wall.

11. The battery device according to claim 9, characterized in that: The concrete frame also includes a protective member, at least a portion of which is disposed on the side surface of the concrete bottom wall facing the cavity, and the protective member is used to contact the battery cell assembly.

12. The battery device according to claim 11, characterized in that: The protective component is integrally formed with the concrete bottom wall; or, the protective component is connected to the side surface of the concrete bottom wall facing the cavity.

13. The battery device according to claim 11 or 12, characterized in that: The protective component is a heat-conducting structural component.

14. The battery device according to claim 10, characterized in that: The interface is located outside the receiving cavity.

15. The battery device according to claim 8, characterized in that: The concrete bottom wall and the concrete side wall are integrally formed structures.

16. The battery device according to claim 1, characterized in that: The concrete frame is a cement concrete frame.

17. An electrical device, characterized in that: The electrical device includes a battery device as described in any one of claims 1 to 16, the battery device being used to provide electrical energy.

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