Battery device and electric device

Abstract

The application belongs to the technical field of batteries, and provides a battery device and a power utilization device. The battery device comprises a battery monomer assembly, a resisting piece and a restraining piece. The battery monomer assembly comprises a plurality of battery monomers arranged along a first direction. The resisting piece is arranged at the end of the battery monomer assembly along the first direction, and abuts against the battery monomers at the end of the battery monomer assembly along the first direction. The resisting piece comprises a concrete structure. The restraining piece is used for restraining the battery monomer assembly and the resisting piece so that the resisting piece and the battery monomers have abutting force. The purpose is to improve the resisting effect on the expansion of the battery monomers.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device. BACKGROUND

[0002] With the rise of new energy equipment represented by new energy vehicles, a battery device has become a key power source. The battery device comprises a box body and battery monomers arranged in the box body. The battery monomers are generally multiple and form a battery monomer assembly. An electrochemical reaction is carried out in the battery monomer to charge and discharge. In the later stage of use of the battery monomer, the battery monomer will swell. Sometimes, the effect of resisting the swelling of the battery monomer by the box body is not good. SUMMARY

[0003] In view of the above problems, the application provides a battery device and a power utilization device, aiming to improve the resistance effect on the swelling of the battery monomer.

[0004] To solve the above problems, in a first aspect, the application provides a battery device, comprising:

[0005] a battery monomer assembly, the battery monomer assembly comprising a plurality of battery monomers arranged along a first direction;

[0006] a resisting member arranged at an end of the battery monomer assembly along the first direction, the resisting member abutting against the battery monomers at the end of the battery monomer assembly along the first direction, and the resisting member comprising a concrete structure; and

[0007] a constraint member for constraining the battery monomer assembly and the resisting member to have an abutting force between the resisting member and the battery monomers.

[0008] The effect of the embodiment is that the concrete structure has high structural strength, compression resistance, load resistance and higher density. The resisting member abuts against the battery monomers by means of the constraint member, has a significant effect on resisting the swelling of the battery monomers, and achieves a good effect of resisting the swelling.

[0009] In one embodiment of the first aspect, the resisting member abuts against a large surface of the battery monomers at the end of the battery monomer assembly along the first direction, and the large surface is the surface with the largest area among the surfaces of the battery monomers.

[0010] The effect of the embodiment is that the resisting effect of the resisting member is applied to the key swelling position, and the excessive swelling of the battery monomers can be avoided to the maximum extent.

[0011] In one embodiment of the first aspect, the battery monomer assembly is provided with the resisting member at both ends along the first direction.

[0012] The effect of the embodiment is that the battery cell expands in volume to the side when swelling, and is not expanded in a single direction, so the embodiment provides at least two ends of the resistance piece, which can form a clamping form on both sides, form a clamping force to resist the expansion of the battery cell, and improve the resistance effect.

[0013] In one embodiment of the first aspect, the constraint piece includes a constraint plate extending in the first direction, and two ends of the constraint plate in the first direction are fixedly connected with the resistance piece, respectively.

[0014] The effect of the embodiment is that the constraint plate has a certain area and has strong structural strength, and can stably bind the resistance piece at the surface of the battery cell that needs to be resisted.

[0015] In one embodiment of the first aspect, the resistance piece has an abutting surface abutting with the battery cell, and the shape of the abutting surface is matched with the surface shape of the battery cell.

[0016] The effect of the embodiment is that the abutting surface can achieve the effect of matching abutting when abutting, and there is no redundant part beyond the surface of the battery cell, and the space is not excessively occupied, and the surface of the battery cell is completely covered.

[0017] In one embodiment of the first aspect, the constraint piece includes a constraint belt, and the constraint belt is connected with the resistance piece and surrounds the outer periphery of the resistance piece and the battery cell assembly.

[0018] The effect of the embodiment is that the adjustability is better when wrapped and bound, and the constraint belt can be adjusted to the appropriate position to bind the resistance piece, so that the stability of the resistance piece is better.

[0019] In one embodiment of the first aspect, a limiting part is arranged on the resistance piece to limit the position of the constraint piece on the resistance piece. The embodiment fixes the position of the constraint piece on the resistance piece, and the side slip phenomenon does not occur.

[0020] In one embodiment of the first aspect, the concrete structure is a cement concrete structure.

[0021] The concrete is made of cement material, so it has high structural strength and large overall quality, and when cement concrete is used, the preparation method of one-time integral pouring and molding can be used, the preparation process is simple and convenient, and the cost is low.

[0022] In one embodiment of the first aspect, the resistance piece further includes a reinforcing framework, and the reinforcing framework and the concrete structure are in an integral structure.

[0023] The embodiment provides a reinforcing framework which is matched with a concrete structure and greatly improves the structural strength of the resisting member.

[0024] In one embodiment of the first aspect, the reinforcing framework is arranged inside and / or on the outer surface of the concrete structure.

[0025] The embodiment has the effect that different reinforcing framework arrangement positions are adopted for the concrete structure, and the structural strength of the concrete structure can be greatly improved according to the needs.

[0026] In one embodiment of the first aspect, the reinforcing framework comprises a shell with a mold cavity, and the concrete structure is arranged in the mold cavity.

[0027] The embodiment has the effects that the strength of the concrete structure is reinforced by the reinforcing framework, and the concrete structure is formed by using the reinforcing framework to pour the concrete, thereby reducing the cost and simplifying the preparation process.

[0028] In one embodiment of the first aspect, the reinforcing framework is provided with a cavity cover for closing the mold cavity. The cavity cover is arranged to close the concrete structure, thereby reducing the damage caused by weathering and corrosion.

[0029] In one embodiment of the first aspect, the shell is a rolled piece or a profiled piece.

[0030] The embodiment provides a preparation method of the shell. When the roll forming method is adopted, the processing form is simple and convenient to operate. When the profiled piece is adopted, the reinforcing framework has high hardness and structural strength, and the resisting effect is increased.

[0031] In one embodiment of the first aspect, the reinforcing framework comprises at least two shells arranged side by side and a connecting body connecting adjacent shells, the concrete structure is arranged between the adjacent shells, and the connecting body is arranged inside the concrete structure between the adjacent shells.

[0032] The embodiment has the effects that the amount of the reinforcing framework can be saved, and the abutting surface in contact with the surface of the battery monomer is formed.

[0033] In one embodiment of the first aspect, the connecting body comprises a connecting pipe which is in communication with the mold cavity of the shell, the connecting pipe is filled with the concrete structure and is in an integral structure with the concrete structure in the mold cavity.

[0034] The embodiment further improves the structural strength and the overall effect of the resisting member. When the concrete is poured into the mold cavity, the concrete also flows into the pipe hole because the pipe hole is in communication with the mold cavity, thereby forming an overall structure.

[0035] In one embodiment of the first aspect, the shells are further provided with openings communicating with the mold cavities, and the concrete structure within the shells and the concrete structure between adjacent shells are connected through the openings to form an integrated structure. This integrates the inner and outer concrete structures, further enhancing the integrity and structural strength. The integral casting method also facilitates the preparation process.

[0036] In one embodiment of the first aspect, the battery device further includes a housing having a cavity, the battery cell assembly and the resistance member being disposed within the cavity, and the resistance member being fixedly connected to the housing. The fixed connection between the resistance member and the housing further enhances the stability of the resistance member.

[0037] In a second aspect, the present application further provides an electrical device, comprising the battery device provided in any one of the embodiments.

[0038] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 A schematic structural diagram of a vehicle according to some embodiments of the present application;

[0041] Figure 2 A schematic structural diagram of a battery device provided in some embodiments of the present application;

[0042] Figure 3 for Figure 2 A schematic structural diagram of a battery cell assembly;

[0043] Figure 4 This is a schematic structural diagram of a resistance member in some embodiments of the present application;

[0044] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of the middle resistance member;

[0045] Figure 6 for Figure 4 Schematic diagram of the explosion-resistant structure of the medium-resistant component;

[0046] Figure 7 Structure diagram of a resistance member for some embodiments of the present application;

[0047] Figure 8 Structure diagram of a resistance member for some embodiments of the present application; Figure 7 Structure diagram of a resistance member for some embodiments of the present application;

[0048] Figure 9 Structure diagram of a resistance member for some embodiments of the present application; Figure 7 Structure diagram of a resistance member for some embodiments of the present application;

[0049] Figure 10 Structure diagram of a resistance member for some embodiments of the present application;

[0050] Figure 11 Structure diagram of a resistance member for some embodiments of the present application; Figure 10 Structure diagram of a resistance member for some embodiments of the present application.

[0051] Reference signs in the detailed description of the embodiments are as follows:

[0052] 1000, vehicle;

[0053] 100, battery device; 200, controller; 300, motor;

[0054] 10, box body; 11, battery monomer assembly; 12, battery monomer; 13, containing cavity; 14, resistance member; 15, concrete structure; 16, constraint member; 17, large surface; 18, abutting surface; 19, reinforcing framework; 20, shell; 21, connecting body; 22, limiting part; 23, mold cavity; 24, cavity cover; 25, opening. DETAILED DESCRIPTION

[0055] The embodiments of the technical solutions of the present application will be described in detail below in combination with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0057] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0058] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0060] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0061] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0062] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0063] At present, from the development of market situation, the application of battery device is more and more extensive. The battery device is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military and police equipment, aerospace and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing.

[0064] The battery device is a complete structural whole, including a box body, a plurality of battery monomers are arranged in the box body, and a battery monomer can also be arranged in the box body in some special scenes. When the battery monomers are multiple, the same row of battery monomers can form a battery monomer assembly.

[0065] In some embodiments, the box body can be part of the chassis structure of the vehicle. For example, part of the box body can be at least part of the floor of the vehicle, or part of the box body can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0066] The battery device can include one or more battery monomer assemblies for providing voltage and capacity. The battery monomer assembly can include a plurality of battery monomers connected in series, in parallel or in mixed connection through a busbar component. The mixed connection refers to the mixture of series connection and parallel connection.

[0067] In some embodiments, the battery monomer assembly is usually formed by arranging a plurality of battery monomers.

[0068] As an example, the battery monomer assembly can be a battery module, and the battery monomer assembly is formed by arranging and fixing a plurality of battery monomers to form an independent module. As an example, the battery monomer assembly can be formed by binding a plurality of battery monomers by a cable tie.

[0069] In some embodiments, the battery device can be a battery pack, and the battery pack includes a box body and one or more battery monomer assemblies, and the battery monomer assemblies are accommodated in the box body.

[0070] As an example, the battery monomer assembly can be a battery module, and the battery monomer assembly can be accommodated in the box body by fixing the battery module in the box body.

[0071] As an example, the battery monomer assembly can also be accommodated in the box body by directly fixing a plurality of battery monomers in the box body.

[0072] Embodiments of the present application provide an electric device with a battery device 100, i.e., an electric device using the battery device 100 as a power supply.

[0073] The technical solutions described in the embodiments of the present application are applicable to various power consumption devices using the battery device 100, where the power consumption device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, and the like. The spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, and the like. The electric toy includes a fixed or mobile electric toy, for example, a game machine, an electric automobile toy, an electric ship toy, an electric airplane toy, and the like. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, an electric planer, and the like. The embodiments of the present application do not specially limit the above power consumption devices.

[0074] The battery device 100 disclosed in the present application can be used in a power consumption device such as a vehicle, a ship, or an aircraft, but is not limited thereto. The power consumption device can use a power supply system provided with the battery device 100 disclosed in the present application, which is beneficial to improve the use reliability of the power consumption device.

[0075] The following embodiments take the vehicle 1000 provided by the embodiments of the present application as an example for illustration.

[0076] Please refer to Figure 1 , Figure 1 The vehicle 1000 provided by some embodiments of the present application is shown in the structural schematic diagram. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, and the like. The vehicle 1000 is internally provided with the battery device 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0077] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, to replace or partially replace the fuel or natural gas to provide driving power for the vehicle 1000.

[0078] As Figure 2The battery device 100 provided by the embodiment of the present application, the battery cell assembly 11 of the battery device 100 is a storage energy component and can perform charge and discharge reactions, a plurality of battery cells 12 form the battery cell assembly 11, the battery cell assembly 11 is arranged in the box body 10, the battery cell 12 includes an electrode assembly, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator.

[0079] In the related art, the volume of the battery cell changes due to the combined action of various factors during the charge and discharge process. For example, the volume of the electrolyte inside the battery cell increases when the temperature rises because the expansion coefficient of the electrolyte is large; the positive and negative electrode materials of the battery cell also expand to a certain extent as the temperature rises, although the expansion coefficient of the positive and negative electrode materials is smaller than that of the electrolyte; the positive and negative electrode materials of the battery cell change to a certain extent during the charge and discharge process, that is, the crystal structure changes, which also causes the volume of the positive and negative electrode materials to change. The above is the thermal expansion of the battery cell. The thermal expansion of the battery cell has a certain influence on the performance and safety of the battery, which can cause the internal pressure of the shell of the battery cell to increase, thereby affecting the strength and sealing performance of the shell, reducing the gap between the positive and negative electrode sheets, increasing the risk of internal short circuit, changing the contact area between the positive and negative electrode sheets and the separator, and thus affecting the internal resistance and capacity of the battery. The box structure for accommodating the battery cell in the related art has low strength and cannot effectively resist the thermal expansion of the battery cell.

[0080] Therefore, the present application provides a battery device 100, which is provided with a resistance piece 14 capable of resisting the expansion of the battery cell 12, so as to increase the resistance effect of the expansion of the battery cell 12.

[0081] Please refer to Figure 2 , Figure 3 The battery device 100 of the present application comprises a battery cell assembly 11, a resistance piece 14 and a constraint piece 16.

[0082] The battery cell assembly 11 comprises a plurality of battery cells 12 arranged along a first direction; the resistance piece 14 is arranged at the end of the battery cell assembly 11 along the first direction, the resistance piece 14 abuts against the battery cell 12 at the end of the battery cell assembly 11 along the first direction, and the resistance piece 14 comprises a concrete structure 15; and the constraint piece 16 is used to constrain the battery cell assembly 11 and the resistance piece 14 so as to have an abutting force between the resistance piece 14 and the battery cell 12.

[0083] The first direction is the arrangement direction of the plurality of battery cells 12 inside the battery cell assembly 11, and the first direction is specifically the X direction in Figure 2 and Figure 3 .

[0084] The battery cell 12 can expand after long-term use. In the embodiment, one battery cell assembly 11 is defined as one unit. The resistance member 14 abuts against the surface of the battery cell 12 of the battery cell assembly 11, specifically, the surface of the battery cell 12 at the end position of the battery cell assembly 11 in the first direction. The restraint member 16 is used to keep the resistance member 14 in abutment with the surface of the battery cell 12. The restraint member 16 can be wound around the circumference of the battery cell assembly 11 and wrap the resistance member 14 to form a constraint on the plurality of battery cells 12 in the battery cell assembly 11 and the resistance member 14, and maintain a certain constraint force. In this way, the resistance member 14 is kept in contact with the surface of the battery cell 12 of the battery cell assembly 11, and the resistance member 14 resists the expansion when the battery cell 12 expands.

[0085] The resistance member 14 of the embodiment includes a concrete structure 15, which refers to a composite material structure in which aggregates are cemented into a whole by cementitious materials. According to different cementitious materials, the concrete can include cement concrete, gypsum concrete, Portland cement concrete, water glass concrete, asphalt concrete, polymer concrete, etc. For example, the cement concrete is obtained by mixing cement as a cementitious material, sand and gravel as aggregates, and water (which can contain additives and admixtures) in a certain proportion, and then stirring.

[0086] The resistance member 14 is all or part of the concrete structure 15, which has high structural strength, compression resistance, load resistance, and higher density. The resistance member 14 abuts against the battery cell 12 by means of the restraint member 16, and has a significant effect on resisting the expansion of the battery cell 12, achieving a good effect of resisting expansion.

[0087] In some embodiments, please refer to Figure 2 and Figure 3 The resistance member 14 abuts against the large surface 17 of the battery cell 12 at the end of the battery cell assembly 11 in the first direction. The large surface 17 of the battery cell 12 is the largest surface among the surfaces of the battery cell 12.

[0088] The resistance member 14 abuts against the large surface 17 of the battery cell 12 at the end of the battery cell assembly 11 in the first direction. The large surface 17 of the battery cell 12 is the largest surface among the surfaces of the battery cell 12.

[0089] Specifically, the battery cell assembly 11 comprises a plurality of battery cells 12 arranged in sequence, and the arranged battery cells 12 are placed in the same posture, so that the large faces 17 of the battery cells 12 at the beginning and the end in the first direction are exposed. In this embodiment, the resisting member 14 is provided to abut against the large faces 17 of the battery cells 12 to resist the expansion of the large faces 17. The plurality of battery cells 12 are placed in the same posture, so that the large faces 17 of the plurality of battery cells 12 are parallel to each other, and the first direction can be perpendicular to the large faces 17 of the battery cells 12. For the battery cell 12, the expansion mainly concentrates on the large face 17 thereof. For the battery cell assembly 11, the large faces 17 of the plurality of battery cells 12 expand in the arrangement direction, and the expansion of the battery cell assembly 11 as a whole is accumulated in the direction perpendicular to the large faces 17. Therefore, the resisting member 14 abuts against the large faces 17 of the battery cells 12 at the ends of the battery cell assembly 11, and can effectively resist the expansion trend. The resisting member 14 has strong structural strength and plays a resisting role.

[0090] The effect of this embodiment is that the resisting role of the resisting member 14 is applied to the key expansion position, so that the excessive expansion of the battery cell 12 can be avoided to the maximum extent.

[0091] In some embodiments, referring to Figure 2 and Figure 3 , the battery cell assembly 11 is provided with the resisting member 14 at both ends in the first direction. That is, the resisting member 14 abuts against at least the opposite ends of the battery cell assembly 11.

[0092] Specifically, when the battery cell 12 expands, the volume expands to the side, and is not expanded in a single direction. Therefore, this embodiment provides the resisting member 14 arranged at least at both ends, which can form a clamping form on both sides to form a clamping force resisting the expansion of the battery cell 12 and improve the resisting effect. The resisting member 14 at both ends can abut against the large face 17 of the battery cell 12, because the large face 17 has a large expansion degree.

[0093] In some embodiments, referring to Figure 2 and Figure 3 , the constraint member 16 comprises a constraint plate extending in the first direction, and the constraint plate is fixedly connected with the resisting member 14 at both ends in the first direction.

[0094] Specifically, the resisting member 14 is arranged at both ends of the battery cell assembly 11 in the first direction. This embodiment provides that the constraint member 16 can be a constraint plate, and the constraint plate can be arranged at both sides of the battery cell assembly 11, and both ends of each constraint plate are connected with the resisting member 14 at both ends of the battery cell assembly 11.

[0095] The restraint 16 of the embodiment is connected with the resistance 14, and the two are combined and wrap around the battery monomer assembly 11. The restraint 16 is connected with the resistance 14 to form an integral structure together with the resistance 14, which wraps around the battery monomer assembly 11.

[0096] The effect of the embodiment is that the restraint plate has a certain area and has strong structural strength, and can stably bind the resistance 14 at the surface of the battery monomer 12 that needs to be resisted.

[0097] In some embodiments, as shown in Figures 2-4 , the resistance 14 has an abutting surface 18 that abuts with the battery monomer 12, and the shape of the abutting surface 18 is adapted to the surface shape of the battery monomer 12 that it abuts with.

[0098] Specifically, the expansion of the battery monomer 12 is manifested in the outward expansion and deformation of the surface of the battery monomer 12. The resistance 14 has an abutting surface 18 that abuts with the surface of the battery monomer 12 to resist the expansion. The surface of the battery monomer 12 can be divided into multiple different surfaces, such as a top surface, a side surface, etc. The embodiment provides that the shape of the abutting surface 18 that abuts with the surface of the battery monomer 12 is adapted. For example, the abutting surface 18 is adapted to the shape of the large surface 17 of the single battery monomer 12 that is exposed at the end.

[0099] The effect of the embodiment is that when abutting, the effect of adapting to abutting can be achieved, and there will be no redundant part that exceeds the surface of the battery monomer 12 and occupies too much space, and at the same time, the surface of the battery monomer 12 is completely covered.

[0100] In some embodiments, as shown in Figure 2 and Figure 3 , the restraint 16 includes a restraint band, and the restraint band is connected with the resistance 14 and surrounds the periphery of the resistance 14 and the battery monomer assembly 11.

[0101] Specifically, the restraint band surrounds the periphery of the resistance 14 and the battery monomer assembly 11.

[0102] The restraint band surrounds the resistance 14 and the battery monomer assembly 11, forming a form that surrounds the battery monomer assembly 11, and when surrounding the resistance 14, the surface of the resistance 14 is pressed.

[0103] The effect of the embodiment is that the adjustability is better when surrounding and binding, and the restraint band can be adjusted to the appropriate position to bind the resistance 14, so that the stability of the resistance 14 is better.

[0104] In some embodiments, as shown in Figure 4 , the resistance 14 is provided with a limiting part 22 to limit the position of the restraint 16 on the resistance 14.

[0105] When the constraint member 16 is arranged in the form of connecting and bypassing the resistance member 14, the resistance member 14 can be provided with a limiting portion 22 to limit the position of the constraint member 16 on the resistance member 14 when bypassing the resistance member 14.

[0106] The embodiment provides the limiting portion 22, which can be arranged in multiple groups, each group including two limiting portions 22, and the constraint member 16 can bypass between the two limiting portions 22, so that the position of the constraint member 16 on the resistance member 14 is fixed and cannot slide sideways and the like.

[0107] Optionally, the limiting portion 22 is a protrusion or the like structure arranged on the surface of the resistance member 14.

[0108] In some embodiments, the constraint member 16 can also be one or a combination of a belt structure, a rope structure, a plate structure, a wire structure, and a strip structure.

[0109] The constraint member 16 of the embodiment can be in various forms, such as a belt structure, a rope structure, a plate structure, a wire structure, or a strip structure.

[0110] The belt structure can be a steel belt, an aluminum belt, or the like, the rope structure can be a steel wire rope, a fiber rope, a hemp rope, or the like, the plate structure can be a steel plate, the wire structure can be a steel wire, an iron wire, or the like, and the strip structure can be a steel strip or the like. The appropriate shape can be selected as needed.

[0111] In some embodiments, the material of the constraint member 16 is one of metal, concrete, and fiber.

[0112] The embodiment provides the material of the constraint member 16, which can also be selected as needed.

[0113] In some embodiments, the concrete structure 15 is a cement concrete structure.

[0114] The concrete is made of cement material, thereby having high structural strength and large overall quality. When the cement concrete is used, the preparation method of integral pouring and one-time molding can be used, the preparation process is simple and convenient, and the cost is low.

[0115] In some embodiments, referring to Figures 4-11 , the resistance member 14 further includes a reinforcing framework 19, and the reinforcing framework 19 and the concrete structure 15 are in an integrated structure.

[0116] The reinforcing framework 19 is integrated with the concrete structure 15. When the concrete is poured, the reinforcing framework 19 can be in contact with the poured concrete, and after the concrete is molded, the reinforcing framework 19 forms an integrated structure with the concrete structure 15.

[0117] The reinforcing framework 19 can be in the form of a rib, a plate or a shell, and can be made of steel.

[0118] The reinforcing framework 19 is used in cooperation with the concrete structure 15 to greatly improve the structural strength of the resistance member 14.

[0119] In some embodiments, referring to Figures 4-11 The reinforcing framework 19 is arranged inside and / or on the surface of the concrete structure 15.

[0120] The reinforcing framework 19 can be buried inside the concrete structure 15, arranged on the surface of the concrete structure 15, or partially buried inside the concrete structure 15 and partially arranged on the surface of the concrete structure 15.

[0121] Arranged inside the concrete structure 15 means that the reinforcing framework 19 is buried inside the concrete structure 15. Before the concrete is poured, the reinforcing framework 19 is arranged in advance, and then the reinforcing framework 19 is buried when the concrete is poured, forming the concrete structure 15 with the reinforcing framework 19 arranged inside.

[0122] Alternatively, the reinforcing framework 19 can be arranged on the surface of the concrete structure 15. Similarly, before the concrete is poured, the reinforcing framework 19 is arranged in advance. When the concrete is poured, the reinforcing framework 19 is not buried, but contacts the inner surface of the reinforcing framework 19. After the concrete is formed, the reinforcing framework 19 is fixed to the surface of the concrete structure 15 in the form of inlay.

[0123] The effect of the embodiment is that different positions of the reinforcing framework 19 are used for the concrete structure 15, which can be selected as needed, and can greatly improve the structural strength of the concrete structure 15.

[0124] In some embodiments, referring to Figures 4-11 The reinforcing framework 19 includes a shell 20 with a mold cavity 23, and the concrete structure 15 is arranged in the mold cavity 23.

[0125] The shell 20 is a shell structure with an inner cavity, i.e., the mold cavity 23. When the concrete structure 15 is formed, a special formwork is not needed, but the reinforcing framework 19 is directly used as the formwork. The mold cavity 23 of the reinforcing framework 19 is used for pouring concrete, thereby forming the concrete structure 15. At this time, the reinforcing framework 19 is integrated with the concrete structure 15, and the formwork removal process is omitted.

[0126] The shell 20 can include one mold cavity 23 and a shell wall surrounding the mold cavity 23, or multiple mold cavities 23 arranged side by side, with adjacent mold cavities 23 separated by a shell wall.

[0127] The effect of the embodiment is that the strength of the concrete structure 15 is strengthened by the reinforcing framework 19, and the concrete structure 15 is formed by pouring the concrete with the reinforcing framework 19, thereby reducing the cost and simplifying the manufacturing process.

[0128] In some embodiments, referring to Figures 4-11 The reinforcing framework 19 is provided with a cavity cover 24 for closing the mold cavity 23. The cavity cover 24 is also provided at the opening of the shell 20 into which the concrete is poured, that is, the mold cavity 23 for the concrete structure 15 is closed by the cavity cover 24 after pouring and forming. The cavity cover 24 is provided to close the concrete structure 15, thereby reducing the erosion and corrosion thereof.

[0129] The shell 20 can be a plate-shaped shell structure with a certain thickness, which can be open at the top, and the concrete is poured from top to bottom. One side surface of the shell 20 is used to be attached to the surface of the battery monomer 12. In addition, an arc surface can be provided on the surface of the shell 20, for example, an arc-shaped corner is provided at the corner position of the shell 20, which can avoid sharp contact between the constraint member 16 and the surface of the shell 20, and make them smoothly contact.

[0130] In some embodiments, the shell 20 is a rolled or profiled member.

[0131] Specifically, referring to Figures 4-6 The shell 20 can be prepared by rolling and bending an integral plate member;

[0132] Or, referring to Figures 7-9 The shell 20 is a profiled member with the mold cavity 23.

[0133] The embodiment provides the manufacturing form of the shell 20. The integral plate member can be an integral sheet metal member which has a certain ductility and can be rolled. The sheet metal member can be repeatedly bent by rolling, finally forming a shell shape, and the mold cavity 23 is also formed in the shell 20. The number of mold cavities 23 can be set according to the number of bending.

[0134] Alternatively, the shell 20 can also be a profiled member, and the mold cavity 23 is provided on the profiled member. For example, a plate-shaped profiled member is selected before the mold cavity 23 is provided, and the mold cavity 23 is provided at a suitable position. The mold cavities 23 can be provided side by side.

[0135] The embodiment provides a method for manufacturing the shell 20. When the rolling forming method is used, the processing form is simple and convenient to operate. When the profiled member is used, the reinforcing framework 19 has high hardness and structural strength, thereby increasing the resistance effect.

[0136] In some embodiments, referring to Figure 10 andFigure 11 The reinforcing framework 19 comprises at least two housings 20 arranged side by side and connecting bodies 21 connecting the adjacent housings 20, and the concrete structure 15 is arranged between the adjacent housings 20 and inside the concrete structure 15 between the adjacent housings 20.

[0137] The reinforcing framework 19 of the embodiment comprises at least two housings 20 arranged side by side, and one housing 20 is arranged at each end of the resistance member 14, and the housings 20 at the two ends correspond to the positions of the two ends of the surface of the battery monomer 12 to be attached, and the two housings 20 at the two ends have a mold cavity 23, and the concrete is arranged, and the connecting bodies 21 are arranged between the adjacent housings 20, and the adjacent housings 20 are formed into a whole through the connecting bodies 21. In addition, the concrete structure 15 is also arranged in the space between the adjacent housings 20, and the formwork can be arranged between the two housings 20 and together with the housings 20 on both sides to form a cavity structure, and the concrete is poured to form the concrete structure 15 between the housings 20. The resistance member 14 formed in this way is in the shape of a plate and can abut the surface of the battery monomer 12.

[0138] The effect of the embodiment is that the amount of the reinforcing framework 19 can be saved, and when the restraint member 16 bypasses or connects the resistance member 14, the positions of the two ends of the resistance member 14 are subjected to a greater force of the restraint member 16. The housings 20 can be arranged at the two end positions respectively, and the concrete is poured to strengthen the structural strength at this position. The position between the two housings 20 can only be provided with the connecting bodies 21, that is, the concrete structure 15 between the two housings 20 on both sides can only be provided with the connecting bodies 21 inside to meet the requirement of resistance strength, and the abutting surface 18 in contact with the surface of the battery monomer 12 is formed.

[0139] In some embodiments, referring to Figure 10 and Figure 11 The connecting body 21 comprises a connecting pipe in communication with the mold cavity 23 of the housing 20, and the connecting pipe is filled with the concrete structure 15 and is in an integral structure with the concrete structure 15 in the mold cavity 23.

[0140] The connecting body 21 comprises a tubular connecting pipe having a pipe hole, the pipe hole of the connecting pipe is in communication with the mold cavity 23 of the housing 20, and the concrete structure 15 is also filled in the pipe hole and is in an integral structure with the concrete structure 15 in the mold cavity 23.

[0141] The embodiment further strengthens the structural strength and the integrity effect of the resistance member 14. When the concrete is poured into the mold cavity 23, the concrete will also flow into the pipe hole due to the communication between the pipe hole and the mold cavity 23, thereby forming a whole.

[0142] The connecting body 21 can be multiple, arranged along the vertical direction, and the two ends are connected to the housings 20 on both sides respectively.

[0143] In some embodiments, referring to Figure 10 and Figure 11 The shell 20 is further provided with an opening 25 communicating with the mold cavity 23, and the concrete structure 15 in the shell 20 and the concrete structure 15 between the adjacent shells 20 are connected to form an integrated structure through the opening 25.

[0144] Specifically, the opening 25 is arranged on the side wall of the shell 20, and specifically arranged on the opposite side walls of the adjacent shells 20, so that the space between the adjacent shells 20 communicates with the mold cavity 23 in the shell 20 through the opening 25, and the concrete in the mold cavity 23 and the concrete in the space between the adjacent shells 20 can be uniformly poured during pouring of the concrete, so that the inner and outer concrete structures 15 become integrated, further enhancing the integrity effect and structural strength, and the form of integral pouring also facilitates the preparation process.

[0145] In some embodiments, as Figure 2 The battery device 100 further comprises a box body 10, the box body 10 has a containing cavity 13, the battery cell assembly 11 and the resistance piece 14 are arranged in the containing cavity 13, and the resistance piece 14 is fixedly connected with the box body 10.

[0146] The box body 10 has a containing cavity 13; the battery cell assembly 11 comprises at least one battery cell 12, and the battery cell assembly 11 is arranged in the containing cavity 13.

[0147] Specifically, the box body 10 can include a box body part and a box cover arranged on the box body part, both of which enclose the containing cavity 13, and the box body and the box cover are detachably connected, and the containing cavity 13 can be a closed space to ensure a closed working environment of the battery cell 12. A plurality of battery cell assemblies 11 can be arranged in the box body 10, and each battery cell assembly 11 can include a plurality of battery cells 12 arranged side by side.

[0148] The resistance piece 14 can be further fixedly connected with the box body 10, so as to further enhance the stability of the resistance piece 14.

[0149] The application further provides a power utilization device comprising the battery device 100 provided by any one of the embodiments.

[0150] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: a battery cell assembly, the battery cell assembly comprising a plurality of battery cells arranged along a first direction; a resistance member, the resistance member being provided at an end portion of the battery cell assembly along the first direction, the resistance member being in contact with the battery cell at the end portion of the battery cell assembly located in the first direction, the resistance member comprising a concrete structure; as well as A restraining member is used to restrain the battery cell assembly and the resisting member so that there is a contact force between the resisting member and the battery cell.

2. The battery device according to claim 1, wherein: The resisting member abuts against a large surface of the battery cell at an end portion of the battery cell assembly in the first direction, where the large surface of the battery cell is the surface with the largest area among all surfaces of the battery cell.

3. The battery device according to claim 1, wherein: The resistance members are provided at both ends of the battery cell assembly along the first direction.

4. The battery device according to claim 3, wherein: The restraining member includes a restraining plate extending along the first direction, and both ends of the restraining plate along the first direction are fixedly connected to the resistance member respectively.

5. The battery device according to any one of claims 1 to 3, characterized in that: The resisting member has an abutting surface abutting against the battery cell, and the shape of the abutting surface is adapted to the surface shape of the battery cell abutting against it.

6. The battery device according to any one of claims 1 to 3, characterized in that: The restraining member includes a restraining belt, and the restraining belt is connected to the resisting member and surrounds the outer periphery of the resisting member and the battery cell assembly.

7. The battery device according to claim 6, wherein: The resisting member is provided with a limiting portion to limit the position of the restraining member on the resisting member.

8. The battery device according to any one of claims 1 to 4, characterized in that: The concrete structure is a cement concrete structure.

9. The battery device according to any one of claims 1 to 4, characterized in that: The resistance member further includes a reinforcement frame, and the reinforcement frame and the concrete structure are an integrated structure.

10. The battery device according to claim 9, wherein: The reinforcement skeleton is arranged on the interior and / or exterior surface of the concrete structure.

11. The battery device according to claim 9, wherein: The reinforcement frame includes a shell having a mold cavity, and the concrete structure is arranged in the mold cavity.

12. The battery device according to claim 11, wherein: The reinforcement frame is provided with a cavity cover, and the cavity cover is used to close the mold cavity.

13. The battery device according to claim 11, wherein: The shell is a rolled part or a profile part.

14. The battery device according to claim 11, wherein: The reinforcement skeleton includes at least two shells arranged side by side and a connector connecting adjacent shells. The concrete structure is provided between adjacent shells, and the connector is located inside the concrete structure between adjacent shells.

15. The battery device according to claim 14, wherein: The connecting body includes a connecting pipe, which is communicated with the mold cavity of the shell. The connecting pipe is filled with the concrete structure and forms an integrated structure with the concrete structure in the mold cavity.

16. The battery device according to claim 14, wherein: The shell is further provided with an opening communicating with the mold cavity, and the concrete structure located in the shell and the concrete structure located between adjacent shells are connected through the opening to form an integrated structure.

17. The battery device according to any one of claims 1 to 4, characterized in that: The battery pack further comprises a box body having a cavity, the battery cell assembly and the resistance member are arranged in the cavity, and the resistance member is fixedly connected to the box body.

18. An electrical device, characterized in that: A battery device comprising any one of claims 1 to 17.

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