Battery device and electric device

Abstract

The utility model belongs to the technical field of batteries, and provides a battery device and a power utilization device.The battery device comprises a battery single body assembly, a box body assembly, a first fixing band and a second fixing band, the box body assembly comprises a frame body, a first limiting beam, a second limiting beam and a third limiting beam, and the first limiting beam, the second limiting beam and the third limiting beam are connected to the frame body; the first limiting beam and the frame body jointly define a battery bin and an electrical bin, the second limiting beam and the third limiting beam are both located in the battery bin and are both arranged opposite to the first limiting beam, the second limiting beam is attached to the frame body, and the third limiting beam is arranged between the first limiting beam and the second limiting beam; the battery monomer assembly is accommodated in the battery compartment; the first fixing belt is respectively connected with the first limiting beam and the third limiting beam; and the second fixing band is arranged between the second limiting beam and the third limiting beam and is connected with the battery monomer assembly. The limiting mode between beam structures with different stability is more flexible, and reliability and adaptability are both considered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] In the use process of the battery device, the battery monomer will swell, and the swelling force of the battery monomer is borne by the beam structure in the box assembly. When the deformation amount of the box beam is large, the risk of failure of the battery structure is easy to occur.

[0003] The connection and fixation of the fixing belt between the beam structures of the box assembly can reduce the deformation amount of the beam structure. It can be known that a plurality of beam structures are usually arranged in the box assembly and arranged at different positions to realize the partition fixation of the battery monomer assembly. However, the stress environment of the beam structures at different positions is significantly different, so that the stability of each beam structure is different.

[0004] Therefore, if a fixed mode is used to limit each beam structure in the box assembly, it is difficult to balance the reliability and adaptability. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present application is to provide a battery device and a power utilization device, and to solve the technical problem that the limiting mode between the beam structures with different stability in the battery device is not flexible enough and it is difficult to balance the reliability and adaptability.

[0006] In a first aspect, the present application provides a battery device, comprising:

[0007] a battery monomer assembly;

[0008] a box assembly, comprising a frame and a first limiting beam, a second limiting beam and a third limiting beam connected to the frame, the first limiting beam and the frame jointly form a battery compartment and an electrical compartment which are arranged at intervals, and the battery monomer assembly is accommodated in the battery compartment; the second limiting beam and the third limiting beam are both located in the battery compartment and are arranged opposite to the first limiting beam, the second limiting beam is arranged in close contact with the frame, and the third limiting beam is arranged between the first limiting beam and the second limiting beam;

[0009] a first fixing belt connected with the first limiting beam and the third limiting beam respectively;

[0010] a second fixing belt arranged between the second limiting beam and the third limiting beam and connected with the battery monomer assembly.

[0011] In the embodiment, the fixing belt for limiting the deformation of the battery monomer assembly and the limiting beam is designed in a segmented manner, that is, a first fixing belt and a second fixing belt are respectively arranged, the two ends of the first fixing belt are directly connected with the first limiting beam and the third limiting beam respectively, so as to limit and constrain the first limiting beam and the third limiting beam, the constraint force on the first limiting beam can be enhanced, and the excessive deformation of the first limiting beam is directly limited; the second fixing belt is arranged between the third limiting beam and the second limiting beam, and is directly connected with the battery monomer assembly between the third limiting beam and the second limiting beam to form an integral module, so as to improve the overall stability of the third limiting beam, the second limiting beam and the battery monomer assembly therebetween. The above design can combine the layout characteristics of the first limiting beam, the second limiting beam and the third limiting beam, and arrange the fixing belt in a targeted manner, so that the overall structural design of the battery device is more flexible; in addition, the segmented design between the first fixing belt and the second fixing belt can reduce the problem of uneven stress caused by the excessive span of a single fixing belt across the first limiting beam and the second limiting beam.

[0012] In one of the embodiments, the strength of the material used to prepare the first fixing belt is higher than that of the material used to prepare the second fixing belt.

[0013] In the embodiment, the anti-breaking or anti-fracture capability of the first fixing belt is higher than that of the second fixing belt, so as to more match the poor structural stability of the first limiting beam, so that the limiting of the battery device inside is more targeted and flexible, and the redundant design is reduced to reduce the production cost and the weight of the battery device.

[0014] In one of the embodiments, the first fixing belt includes a metal fixing belt and an insulating layer wrapped on the surface of the metal fixing belt, and the two ends of the metal fixing belt are fixed on the first limiting beam and the third limiting beam respectively; the second fixing belt is a fixing belt made of composite material.

[0015] In the embodiment, the different properties of metal material and composite material are combined, so that the main body of the first fixing belt is made of metal material to improve the tensile property, and the second fixing belt is made of composite material to improve the lightweight, so as to be more flexible and matched to the stress environment of the first limiting beam and the second limiting beam, and to reduce the production cost while ensuring the limiting and constraining of the limiting beam and the battery monomer.

[0016] In one of the embodiments, the box assembly further includes a first locking assembly, and the two ends of the first fixing belt are connected with the first limiting beam and the third limiting beam through the first locking assembly respectively.

[0017] In the embodiment, the first locking assembly can facilitate disassembly of the first fixing belt, and the first locking assembly can also enhance the connection strength between the first fixing belt and the first limiting beam and the third limiting beam.

[0018] In one of the embodiments, the second fixing belt is bonded to the battery monomer assembly.

[0019] In the embodiment, by bonding the second fixing belt to the battery monomer assembly, the constraint ability of the second fixing belt to the battery monomer assembly is significantly improved, the expansion of the battery monomer assembly during charging and discharging is more effectively controlled, and thus the structural stability and safety of the battery device are improved. In addition, the bonding mode also reduces the relative movement between the second fixing belt and the battery monomer assembly, reduces the friction and wear between the two, and prolongs the service life of the second fixing belt and the battery monomer assembly.

[0020] In one of the embodiments, the battery device further comprises an insulating piece, the insulating piece is arranged on the side of the first fixing belt opposite to the battery monomer assembly, and the first fixing belt is connected to the battery monomer assembly through the insulating piece.

[0021] In the embodiment, the insulating piece has good insulation performance and wear resistance, which not only effectively reduces the probability of short circuit failure, but also protects the battery monomer assembly and the first fixing belt, reduces the failure rate of the battery device, and improves the reliability and service life of the battery device.

[0022] In one of the embodiments, the insulating piece is bonded to the battery monomer assembly.

[0023] In the embodiment, the bonding between the insulating piece and the battery monomer assembly can further improve the constraint of the first fixing belt and the insulating piece to the battery monomer, thereby facilitating to reduce the displacement of the battery monomer due to expansion, and further reducing the extrusion force of the battery monomer on the first limiting beam, the second limiting beam and the third limiting beam, and facilitating to reduce the deformation amount of the three limiting beams.

[0024] In one of the embodiments, a receiving groove is formed on the surface of the insulating piece opposite to the surface of the first fixing belt, and the first fixing belt is received in the receiving groove.

[0025] In the embodiment, the first fixing belt is received in the receiving groove of the insulating piece, which can enhance the limiting and positioning effect of the first fixing belt, and is conducive to improving the space utilization rate inside the battery device and further improving the energy density of the battery device.

[0026] In one of the embodiments, the two ends of the second fixing belt are respectively connected to the third limiting beam and the second limiting beam.

[0027] In this embodiment, the second fixing belt is connected and fixed between the second limiting beam and the third limiting beam, so that the second fixing belt can limit the position of the battery monomer, and also limit the deformation of the second limiting beam and the third limiting beam, further improving the stability of the battery device structure.

[0028] In one of the embodiments, the first fixing belt and the second fixing belt are arranged in line or staggered in the extension direction.

[0029] In this embodiment, the in-line arrangement improves the uniformity of the constraint force, improving the stability of the battery device structure; the staggered arrangement enhances the flexibility and adaptability of the fixing belt arrangement, better adapting to the complex internal environment of the battery compartment; this diversified arrangement selection enables the design of the battery device to be optimized according to actual needs, further improving the practicality and reliability of the battery device.

[0030] In one of the embodiments, the battery monomer assembly includes a plurality of battery monomer groups, each battery monomer group including a plurality of battery monomers arranged in a stack along a first direction, and the plurality of battery monomer groups are arranged in sequence in a second direction; the first fixing belt and the second fixing belt are located above the battery monomer groups, and the battery device further includes a busbar component located above the battery monomer groups and at one end of the first direction, and corresponding to the battery monomer group provided with the busbar component, the second fixing belt is bonded above the battery monomer group.

[0031] In this embodiment, considering the interference between the busbar component and the fixing belt, when the busbar component is provided above one end of the battery monomer group, the second fixing belt is arranged corresponding to the battery monomer group to limit it, so that the fixing belt is not easy to interfere with the busbar component.

[0032] In one of the embodiments, the first fixing belt includes a middle part, two connecting parts and two bending parts, one end of the middle part is connected to one of the connecting parts through one of the bending parts, the other end of the middle part is connected to the other connecting part through the other bending part, and the middle part is arranged in a staggered manner with the connecting parts in the direction perpendicular to the surface of the middle part by means of the bending parts.

[0033] In this embodiment, the bending part is formed on the first fixing belt to form a stepped shape, thereby improving the anti-deformation ability of the first fixing belt, and enabling the first fixing belt to better match the upper surface of the battery monomer and the limiting beam, so that the first fixing belt can maintain stable constraint effect under the condition of long-term bearing the expansion force of the battery monomer.

[0034] In one of the embodiments, the battery device further includes a third fixing belt connected between the first limiting beam and the second limiting beam.

[0035] In the embodiment, the addition of the third fixing belt improves the restraint system of the battery device, forms multiple safeguards, and greatly improves the ability of the battery device to resist cell expansion. The synergistic effect of the third fixing belt and the first fixing belt and the second fixing belt makes the restraint force on the cell assembly more uniform, further improving the structural stability and safety of the battery device.

[0036] In one of the embodiments, the battery device further comprises a third locking assembly, and the two ends of the third fixing belt are connected to the first limiting beam and the second limiting beam through the third locking assembly respectively.

[0037] In the embodiment, the third locking assembly improves the reliability and convenience of the connection between the third fixing belt and the first limiting beam and the second limiting beam, making the installation and removal of the third fixing belt more convenient and better playing its restraining role.

[0038] In one of the embodiments, the third fixing belt is bonded to the cell assembly.

[0039] In the embodiment, the third fixing belt and the cell assembly form a whole, further improving the restraining ability of the cell assembly, and the expansion of the cell assembly is more effectively controlled. In addition, the bonding connection reduces the relative movement between the third fixing belt and the cell assembly, reduces friction and wear, prolongs the service life of the third fixing belt and the cell assembly, and improves the reliability of the battery device.

[0040] In one of the embodiments, a plurality of first fixing belts are provided, the plurality of first fixing belts are arranged in the first direction and are spaced apart in the second direction; corresponding to the first fixing belts, a plurality of second fixing belts are provided, each second fixing belt is arranged in the first direction and is collinear with each first fixing belt; the battery device further comprises a plurality of third fixing belts arranged in the first direction, each third fixing belt is connected between the first limiting beam and the second limiting beam, and the plurality of third fixing belts are spaced apart in the second direction; in the second direction, the plurality of third fixing belts and the plurality of first fixing belts or the plurality of second fixing belts are alternately arranged.

[0041] In the embodiment, the alternating arrangement of the plurality of fixing belts makes the restraint system of the battery device more perfect and uniform, greatly improves the overall restraining effect on the cell assembly, and reduces the deformation and damage of the cell assembly due to uneven stress. In addition, the provision of a plurality of fixing belts also improves the redundancy of the battery device, so that even if individual fixing belts fail, other fixing belts can still play a certain restraining role, improving the reliability of the battery device.

[0042] In a second aspect, the application provides a power consuming device comprising the battery device of any one of the above, the battery device being used for storing or providing electric energy.

[0043] The above description is only a summary of the technical solutions of the application. In order to make the technical means of the application more clear and understandable, and to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following will describe the specific embodiments of the application in detail. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments of the application or the prior art description. Obviously, the drawings described below are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0045] Figure 1 The structural schematic diagram of a vehicle is provided for some embodiments of the application;

[0046] Figure 2 The exploded structural schematic diagram of a battery device is provided for some embodiments of the application;

[0047] Figure 3 The internal structural schematic diagram of a battery device is provided for some embodiments of the application;

[0048] Figure 4 The isometric view of Figure 3 ;

[0049] Figure 5 The structural schematic diagram of the inside of a battery compartment in a battery device is provided for some embodiments of the application;

[0050] Figure 6 The isometric view of Figure 5 ;

[0051] Figure 7 The structural schematic diagram of the connection between a first fixing belt and an insulating piece in a battery device is provided for some embodiments of the application Figure 1 ;

[0052] Figure 8 The isometric view of Figure 7 ;

[0053] Figure 9 The structural schematic diagram of the connection between a first fixing belt and an insulating piece in a battery device is provided for some embodiments of the application Figure 2 ;

[0054] Figure 10 The isometric view ofFigure 9 C-C cross-sectional view in

[0055] Figure 11 is Figure 9 axonometric view of

[0056] BRIEF DESCRIPTION OF DRAWINGS

[0057] 1000, vehicle; 1100, battery device; 1110, box assembly; 1111, box cover part; 1112, box frame part; 1113, frame; 1114, first limiting beam; 1115, second limiting beam; 1116, third limiting beam; 1117, battery compartment; 1118, electrical compartment; 1120, battery cell assembly; 1121, battery cell; 1130, first fixing band; 1131, metal fixing band; 1132, insulating layer; 1133, middle part; 1134, connecting part; 1135, bending part; 1136, bonding structure; 1140, second fixing band; 1150, third fixing band; 1160, first locking assembly; 1170, insulating piece; 1171, accommodating groove; 1180, third locking assembly; 1190, busbar component; 1200, controller; 1300, motor; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0058] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as embodiments, and cannot limit the protection scope of the present application.

[0059] 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 this application belongs; the terms used herein are only for the purpose of describing specific embodiments 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.

[0060] 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 "a plurality of" is two or more, unless otherwise explicitly specified.

[0061] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0062] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character“ / ” herein generally means that the front and rear associated objects are in an“or” relationship.

[0063] In the description of the embodiments of the application, the term“a plurality of” refers to two or more (including two), and similarly, “a plurality of groups” refers to two or more groups (including two groups), and “a plurality of pieces” refers to two or more pieces (including two pieces).

[0064] In the description of the embodiments of the 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 based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the 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 application.

[0065] In the description of the embodiments of the 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 application can be understood according to the specific circumstances.

[0066] In the field of new energy, the battery device as the core component of energy storage and supply, its structural stability, safety and space utilization directly affect the performance of the power device. With the development of power battery towards high energy density and high integration, the number of battery monomers is increasing, and higher requirements are put forward for the fixing reliability of the battery monomer assembly.

[0067] During the use of the battery device, the battery monomer will expand, and the expansion force of the battery monomer is borne by the beam structure in the box assembly. When the deformation of the box beam is large, the risk of failure of the battery structure is easy to occur.

[0068] The connection and fixation of the fixing belt between the beam structures of the box assembly can reduce the deformation of the beam structure. It can be known that a plurality of beam structures are usually arranged in the box assembly and arranged at different positions to realize the partition fixation of the battery monomer assembly. However, the stress environment of the beam structures at different positions is significantly different, resulting in different stability of each beam structure.

[0069] Therefore, if a fixed mode is used to limit each beam structure in the box assembly, it is difficult to balance the reliability and adaptability.

[0070] For example, in the structural design of the power battery device, the limiting beam in the box assembly serves as a support carrier of the fixing belt, and the connection stability of the limiting beam and the frame directly affects the constraint effect of the fixing belt. Specifically, for the case that three limiting beams are arranged in the box assembly, the first limiting beam serves as a separation component of the battery compartment and the electrical compartment, and usually needs to span in the internal space of the box assembly. The two ends of the first limiting beam are connected with the frame, and the middle part is in a suspended state. This structure makes the middle part of the first limiting beam have a relatively large deformation caused by bending moment when bearing the expansion force of the battery monomer. Especially under the condition of increased expansion of the battery monomer or vehicle vibration, the degree of deformation will be further increased. In contrast, the second limiting beam is usually located at the edge position of the battery compartment, and one end or both ends thereof are directly and rigidly connected with the frame. The frame can provide sufficient support to the second limiting beam, so the overall stability of the second limiting beam is significantly higher than that of the first limiting beam. The third limiting beam is arranged between the first limiting beam and the second limiting beam, and the structural stability of the third limiting beam is similar to that of the first limiting beam. However, the third limiting beam is usually arranged at the middle position of the battery compartment, and the battery monomers are arranged on both sides of the third limiting beam. Both sides of the third limiting beam are subjected to the expansion force, and the expansion forces are offset. Therefore, the structural stability of the third limiting beam is better than that of the first limiting beam.

[0071] However, in the related art, the two adjacent limiting beams are fixed by the fixed ends with the same material, the same structure and the same fixing mode, and the adaptive adjustment is not made according to the stability difference of different limiting beams. For example, the fixing belt connecting the first limiting beam and the intermediate support structure (such as the third limiting beam) is completely consistent with the fixing belt connecting the second limiting beam and the intermediate support structure in terms of material selection, strength parameter or connection mode. This “non-discriminatory design” has obvious defects.

[0072] On one hand, if the fixing band is designed according to the high stability requirement of the third limiting beam, the fixing band can be made of low-strength material. Since the first limiting beam has poor stability, when the fixing band is connected between the first limiting beam and the third limiting beam, the fixing band may be broken due to insufficient strength, and cannot constrain the expansion force of the battery monomer. On the other hand, if the fixing band is designed according to the low stability requirement of the first limiting beam, the fixing band can be made of high-strength metal material. However, the setting of the high-strength fixing band between the third limiting beam and the second limiting beam is a design with great redundancy and waste, which is not conducive to controlling the manufacturing cost.

[0073] Therefore, the battery device provided in the present application is designed as a segmented type, i.e., the first fixing band and the second fixing band are arranged respectively, so that the two ends of the first fixing band are directly connected with the first limiting beam and the third limiting beam respectively, thereby realizing the limiting and constraining of the first limiting beam and the third limiting beam, which can enhance the constraining force of the first limiting beam and is conducive to directly limiting the excessive deformation of the first limiting beam. The battery monomer assembly is directly connected between the third limiting beam and the second limiting beam to form an overall module, which improves the overall stability of the third limiting beam, the second limiting beam and the battery monomer assembly therebetween. The above design can combine the layout characteristics of the first limiting beam, the second limiting beam and the third limiting beam, and arrange the fixing band targetedly, so that the overall structural design of the battery device is more flexible. In addition, the segmented design between the first fixing band and the second fixing band is conducive to reducing the problem of uneven stress caused by the excessive span of a single fixing band across the first limiting beam and the second limiting beam.

[0074] Specifically, referring to FIG. 1, Figure 2 The battery device 1100 disclosed in the embodiments of the present application can be used in various energy storage devices and energy storage systems using the battery device 1100 as a power source or an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a portable device, a notebook computer, an electric toy, an electric tool, an electric vehicle, a vehicle 1000, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0075] The following embodiments are described by taking a vehicle 1000 as an example for convenience of description.

[0076] Please refer to Figure 1 , Figure 1A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric vehicle, a hybrid electric vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery device 1100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 1100 can be used for power supply of the vehicle 1000, for example, the battery device 1100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 1200 and a motor 1300, the controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, 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 1100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0078] The following embodiments are described for convenience by taking the battery device 1100 horizontally placed as an example, wherein the definition of direction can include vertical direction and horizontal direction, the vertical direction and the horizontal direction are perpendicular to each other, and the vertical direction can be understood as the height direction of the box assembly 1110, and the horizontal direction can be understood as the length direction or the width direction of the box assembly 1110. Therefore, the position below the box assembly 1110 can be understood as the bottom of the box assembly 1110. The first direction X and the second direction Y involved in the following description are both two perpendicular directions in the horizontal plane.

[0079] According to some embodiments of the present application, with reference to Figures 2-6As shown, the battery device 1100 provided by the embodiments of the present application includes a battery cell assembly 1120, a box assembly 1110, a first fixing belt 1130 and a second fixing belt 1140. The box assembly 1110 includes a frame 1113, a first limiting beam 1114, a second limiting beam 1115 and a third limiting beam 1116, which are all connected to the frame 1113. The first limiting beam 1114 cooperates with the frame 1113 to form a battery compartment 1117 and an electrical compartment 1118 which are arranged at intervals. The second limiting beam 1115 and the third limiting beam 1116 are both arranged in the battery compartment 1117 and are arranged opposite to the first limiting beam 1114. The second limiting beam 1115 is arranged in close contact with the frame 1113. The third limiting beam 1116 is arranged between the first limiting beam 1114 and the second limiting beam 1115. The battery cell assembly 1120 is accommodated in the battery compartment 1117. The first fixing belt 1130 is connected to the first limiting beam 1114 and the third limiting beam 1116 respectively. The second fixing belt 1140 is arranged between the second limiting beam 1115 and the third limiting beam 1116 and is connected to the battery cell assembly 1120.

[0080] Specifically, referring to Figure 2 As shown, Figure 2 An exploded structural schematic diagram of the battery device 1100 provided by some embodiments of the present application is shown. The battery device 1100 includes a box assembly 1110 and one or more battery cell assemblies 1120. The box assembly 1110 has an accommodation cavity formed therein. The battery cell assembly 1120 is accommodated in the accommodation cavity. The battery cell assembly 1120 is usually formed by arranging a plurality of battery cells 1121. The plurality of battery cells 1121 can be arranged in a stack in a first direction. Alternatively, for example, the battery cell assembly 1120 can also be a battery module. The battery module is formed by arranging and fixing a plurality of battery cells 1121 into an independent module. In each independent module, the plurality of battery cells 1121 are arranged in a stack in the first direction. A plurality of independent modules are arranged in sequence in a second direction. The second direction is perpendicular to the first direction. As an example, the battery module can be formed by binding the plurality of battery cells 1121 by a cable tie. The box assembly 1110 is used to provide the accommodation cavity for the battery cell assembly 1120. The box assembly 1110 can adopt various structures.

[0081] The battery cell 1121 refers to the smallest unit that constitutes the battery device 1100. Each battery cell 1121 can be a secondary battery cell or a primary battery cell. It can also be a lithium-sulfur battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, but is not limited thereto. The battery cell 1121 can be in the shape of a cylinder, a flat body, a cuboid or other shapes.

[0082] The box assembly 1110 has a receiving cavity, and the battery cell assembly 1120 is received in the receiving cavity. For example, the box assembly 1110 includes a box cover part 1111 and a box frame part 1112, the box cover part 1111 and the box frame part 1112 are covered with each other, and the box cover part 1111 and the box frame part 1112 jointly define the receiving cavity for accommodating the battery cell assembly 1120. The box frame part 1112 can be a hollow structure with one end open, and the box cover part 1111 can be a plate structure. In this case, the box cover part 1111 can be understood as an end cover on the box assembly 1110, and the box cover part 1111 is covered on the open side of the box frame part 1112, so that the box cover part 1111 and the box frame part 1112 jointly define the receiving cavity. The box cover part 1111 and the box frame part 1112 can also be hollow structures with one side open, and the open side of the box cover part 1111 is covered on the open side of the box frame part 1112. Of course, the box assembly 1110 formed by the box cover part 1111 and the box frame part 1112 can have various shapes, such as a cylinder, a cuboid, etc. In this application, the box assembly 1110 is taken as a cuboid for example. Generally, in the battery cell assembly 1120, one end of each battery cell provided with a pole is arranged opposite to the box cover part 1111.

[0083] The interior of the box assembly 1110 is separated by the first limiting beam 1114, so that the receiving cavity is divided into two cavities arranged apart from each other, i.e., an electrical compartment 1118 and a battery compartment 1117. The battery compartment 1117 can be used to accommodate the battery cell assembly 1120, and the electrical compartment 1118 can be used to accommodate electrical components such as a high-voltage box.

[0084] For example, the plurality of battery cells 1121 in the battery cell assembly 1120 are arranged in a stack in the first direction X, and each battery cell 1121 is a cuboid. In the first direction X, the battery cell 1121 has a large face, which should be understood as one or two sides with the largest area among the four sides of the battery cell 1121. When the battery cell 1121 expands, the direction of expansion deformation is mainly along the direction perpendicular to the large face, that is, the expansion direction of the battery cell 1121 is the first direction X.

[0085] For the first limiting beam 1114, the first limiting beam 1114 is located at one side of the large surface of the battery monomer 1121 at the end of the battery monomer assembly 1120, the first limiting beam 1114 can be understood as an expansion beam located in the accommodating cavity of the box body assembly 1110, both ends of the first limiting beam 1114 are connected with the frame 1113 respectively and the middle part is in a suspended state, one side of the first limiting beam 1114 is the electrical bin 1118, and the other side is the battery bin 1117, and the first limiting beam 1114 divides the accommodating cavity into the electrical bin 1118 and the battery bin 1117. For example, the frame 1113 includes a frame and a bottom plate connected to the bottom of the frame, the bottom of the first limiting beam 1114 can be welded or bonded or fixed by bolt connection with the bottom plate, and both ends of the first limiting beam 1114 can be welded or bonded or connected by bolt between the frame. The first limiting beam 1114 can be prepared by metal profile, pultruded composite material and the like process.

[0086] The second limiting beam 1115 is arranged in the battery bin 1117 and spaced opposite to the first limiting beam 1114, and generally abuts against the frame of the frame 1113, the side surface of the beam body of the second limiting beam 1115 abuts against the inner side surface of the frame, and the frame can play a role of lateral support for the second limiting beam 1115. Therefore, compared with the first limiting beam 1114, the structural stability of the second limiting beam 1115 is higher than that of the first limiting beam 1114. The bottom of the second limiting beam 1115 can be welded or bonded or fixed by bolt connection with the bottom plate of the frame 1113, and both ends of the second limiting beam 1115 can be welded or bonded or connected by bolt between the frame 1113. The second limiting beam 1115 can be prepared by metal profile, pultruded composite material and the like process.

[0087] The third limiting beam 1116 is located in the middle region of the battery bin 1117, and the third limiting beam 1116 is spaced opposite to the first limiting beam 1114 and the second limiting beam 1115 respectively. The bottom of the third limiting beam 1116 can be welded or bonded or fixed by bolt connection with the bottom plate of the frame 1113, and both ends of the third limiting beam 1116 can be welded or bonded or connected by bolt between the frame 1113. The third limiting beam 1116 can be prepared by metal profile, pultruded composite material and the like process. Since the battery monomers 1121 are distributed on both sides of the third limiting beam 1116, the expansion forces of the battery monomers 1121 on both sides acting on the third limiting beam 1116 can be offset, and the structural stability of the third limiting beam 1116 is higher than that of the first limiting beam 1114.

[0088] Through the above analysis, it can be known that the fixed belt is arranged only between the first limiting beam 1114 and the second limiting beam 1115, the span of the fixed belt is too large, which is easy to cause uneven stress, in addition, the fixed belt is too long, and the sag problem will occur in the middle region of the extension length of the fixed belt, the rigidity of the fixed belt is insufficient, which affects the limiting and restraining effect of the fixed belt on the limiting beam.

[0089] Therefore, a segmented fixed belt is adopted in the present example, that is, two fixed belts are arranged, that is, the first fixed belt 1130 and the second fixed belt 1140, thereby forming a segmented fixed belt combination form. The first fixed belt 1130 is connected between the first limiting beam 1114 and the third limiting beam 1116, and both ends of the first fixed belt 1130 are connected with the first limiting beam 1114 and the third limiting beam 1116 respectively; the second fixed belt 1140 is arranged between the second limiting beam 1115 and the third limiting beam 1116 and is connected with the battery monomer 1121 between the second limiting beam 1115 and the third limiting beam 1116, thereby forming a two-segment limiting form. According to the difference in structural stability of the first limiting beam 1114 and the second limiting beam 1115, the first fixed belt 1130 and the second fixed belt 1140 are differentially arranged.

[0090] The first fixed belt 1130 is directly connected with the first limiting beam 1114 and the third limiting beam 1116, and the first fixed belt 1130 can be fixed between the first limiting beam 1114 and the third limiting beam 1116 by welding, buckle connection, bolt connection and the like, thereby directly realizing the constraint of the first limiting beam 1114, reducing the deformation amount of the first limiting beam 1114, and reducing the risk of excessive deformation of the first limiting beam 1114. Specifically, for example, both ends of the first fixed belt 1130 can be directly welded on the first limiting beam 1114 and the third limiting beam 1116, thereby directly and effectively limiting the excessive deformation of the first limiting beam 1114; for another example, both ends of the first fixed belt 1130 can be detachably connected on the first limiting beam 1114 and the third limiting beam 1116 through a bolt or the like locking component, thereby directly and effectively limiting the excessive deformation of the first limiting beam 1114, and facilitating the assembly and disassembly of the first fixed belt 1130.

[0091] The second fixing band 1140 is connected with the battery monomer 1121 in the battery monomer assembly 1120, and the connection mode can include welding, bonding, magnetic attraction connection, etc., thereby limiting and restricting the displacement of the battery monomer 1121 between the second limiting beam 1115 and the third limiting beam 1116, reducing the displacement risk of the battery monomer 1121, thereby being able to reduce the extrusion force of the battery monomer 1121 on the second limiting beam 1115, the third limiting beam 1116 and the first limiting beam 1114, and reducing the excessive deformation risk of the three limiting beams. After the second fixing band 1140 is connected with the battery monomer assembly 1120, an integral module can be formed, thereby being beneficial to improving the structural stability of the battery monomer assembly 1120 between the second limiting beam 1115 and the third limiting beam 1116.

[0092] In the embodiment, the fixing band for limiting the deformation of the battery monomer assembly 1120 and the limiting beam is designed in a segmented manner, that is, the first fixing band 1130 and the second fixing band 1140 are respectively arranged, and the reasons for the poor stability of the first limiting beam 1114 are that the two ends of the first fixing band 1130 are directly connected with the first limiting beam 1114 and the third limiting beam 1116 respectively, thereby limiting and restricting the first limiting beam 1114 and the third limiting beam 1116, being able to enhance the restriction force of the first limiting beam 1114, and being beneficial to directly limiting the excessive deformation of the first limiting beam 1114; and the second fixing band 1140 is arranged between the third limiting beam 1116 and the second limiting beam 1115, and is directly connected with the battery monomer assembly 1120 between the third limiting beam 1116 and the second limiting beam 1115 to form an integral module, thereby improving the overall stability of the third limiting beam 1116, the second limiting beam 1115 and the battery monomer assembly 1120 therebetween. The above design can combine the layout characteristics of the first limiting beam 1114, the second limiting beam 1115 and the third limiting beam 1116, and arrange the fixing band in a targeted manner, so that the overall structural design of the battery device 1100 is more flexible. In addition, the segmented design between the first fixing band 1130 and the second fixing band 1140 is beneficial to reducing the problem of uneven stress caused by the excessive span of a single fixing band across the first limiting beam 1114 and the second limiting beam 1115. In addition, under the premise of ensuring reliable connection, the segmented design of the first fixing band 1130 and the second fixing band 1140, the second fixing band 1140 can not be directly connected with the third limiting beam 1116 and the second limiting beam 1115, thereby being able to save the use of locking components and welding materials, so as to achieve the purposes of reducing redundant design and reducing manufacturing cost.

[0093] In some embodiments, the strength of the material used to prepare the first fixing band 1130 is higher than the strength of the material used to prepare the second fixing band 1140.

[0094] In particular, strength is the most basic property of a material to resist damage and fracture, in which the fracture strength (also known as ultimate strength), i.e., the maximum stress that the material can withstand before breaking, is directly related to the resistance to fracture.

[0095] The strength of the material used to make the first fixing band 1130 is higher than that of the material used to make the second fixing band 1140, so that the damage resistance and fracture resistance of the first fixing band 1130 are higher than those of the second fixing band 1140. The second fixing band 1140 is different from the first fixing band 1130 in material (or material), which can achieve the purpose of making the strength of the first fixing band 1130 higher than that of the second fixing band 1140.

[0096] The strength of the material of the first fixing band 1130 is greater, thereby providing greater constraint force between the first limiting beam 1114 and the third limiting beam 1116 with poor stability, so as to limit the first limiting beam 1114 to generate greater (or excessive) deformation, for example, the first fixing band 1130 is made of metal, steel, etc. Compared with the first fixing band 1130, the strength of the material of the second fixing band 1140 is relatively low, thereby adapting to the second limiting beam 1115 and the third limiting beam 1116 with relatively good stability, connecting the second fixing band 1140 and the battery monomer 1121 to reduce the production cost under the premise of meeting the sufficient constraint force, for example, the second fixing band 1140 is made of plastic, woven material, elastic material, etc.

[0097] In this example, under the action of the expansion force of the battery monomer 1121, the difference in stability of the first fixing band 1130 and the second fixing band 1140 is combined, so that the first fixing band 1130 and the second fixing band 1140 both have a constraint force that meets the requirements. For the first limiting beam 1114 which is easy to deform, the first fixing band 1130 with higher strength is used, so that the excessive deformation of the first limiting beam 1114 can be more reliably limited. By relatively reducing the strength of the second fixing band 1140, the structural stability of the second limiting beam 1115, the third limiting beam 1116 and the battery monomer assembly 1120 between them can be guaranteed, and the production cost can also be reduced, which is conducive to reducing the weight of the battery device.

[0098] In this embodiment, the strength of the first fixing band 1130 is higher than that of the second fixing band 1140, so as to more match the structural stability of the first limiting beam 1114, so that the limiting of the battery device 1100 is more targeted and flexible, which is conducive to reducing the redundant design, reducing the production cost, and reducing the weight of the battery device 1100.

[0099] In some embodiments, with reference to Figure 7 , Figure 8 andFigure 9 As shown, the first fixing band 1130 includes a metal fixing band 1131 and an insulation layer 1132 wrapped on the surface of the metal fixing band 1131, and two ends of the metal fixing band 1131 are fixed on the first limiting beam 1114 and the third limiting beam 1116 respectively; the second fixing band 1140 is a fixing band of composite material.

[0100] Specifically, the first fixing band 1130 includes a metal fixing band 1131, which is prepared by using a metal material and has the characteristics of high strength and strong anti-damage capability. The metal fixing band 1131 adopts a sheet structure, and the extension direction of the metal fixing band 1131 is along the stacking direction of the battery monomer 1121 (i.e., along the first direction X), and the two ends of the metal fixing band 1131 can be connected to the first limiting beam 1114 and the third limiting beam 1116.

[0101] The insulation layer 1132 is wrapped on the surface of the metal fixing band 1131 and plays an insulation role, so that the first fixing band 1130 is less likely to cause short circuit and discharge risk with the surrounding battery monomer 1121 or other electronic components.

[0102] The core of the first fixing band 1130 adopts a metal material, which can provide stronger tensile performance and better adapt to the stress environment with lower stability of the first limiting beam 1114.

[0103] The second fixing band 1140 is prepared by using a composite material, which has the characteristics of light weight, insulation and corrosion resistance. The composite material usually has comprehensive performance that a single material does not have, for example, the resin matrix material and the fiber reinforced material (such as glass fiber, carbon fiber, etc.) are compounded, which can not only retain the certain toughness and plasticity of the matrix material, but also improve the overall strength, stiffness and corrosion resistance with the help of the reinforced material. In the battery device 1100, the second fixing band 1140 is prepared by using a composite material, which can flexibly adjust the material composition and proportion according to the stress characteristics of the second limiting beam 1115 and the third limiting beam 1116, so that the second fixing band 1140 can meet the constraint requirements of the second limiting beam 1115, the third limiting beam 1116 and the battery monomer assembly 1120, and realize light weight and cost control, which better adapts to the stress environment with higher stability of the second limiting beam 1115.

[0104] In this embodiment, the different performances of the metal material and the composite material are combined, so that the main body of the first fixing band 1130 is prepared by using a metal material to improve the tensile performance, and the second fixing band 1140 is prepared by using a composite material to improve the light weight, so that it can be more flexibly and adaptively applied to the stress environment of the first limiting beam 1114 and the second limiting beam 1115, which is conducive to reducing the production cost while ensuring the limiting and constraint of the limiting beam and the battery monomer 1121.

[0105] In some embodiments, referring to Figures 3-6 As shown, the box assembly 1110 further comprises a first locking assembly 1160, and two ends of the first fixing belt 1130 are connected with the first limiting beam 1114 and the third limiting beam 1116 through the first locking assembly 1160 respectively.

[0106] Specifically, the two ends of the first fixing belt 1130 in the extension direction respectively form a connecting end, one of which is detachably connected with the first limiting beam 1114 through the first locking assembly 1160, and the other of which is detachably connected with the third limiting beam 1116 through the first locking assembly 1160. It can be seen that the first fixing belt 1130 is more convenient to connect and detach with the first limiting beam 1114 and the third limiting beam 1116, and in the case of damage to the first fixing belt 1130, the first locking assembly 1160 can be directly detached to realize replacement of the first fixing belt 1130, which is more convenient for maintenance.

[0107] The first locking assembly 1160 can adopt bolts, buckles and the like. For example, the first locking assembly 1160 adopts high-strength bolts, the strength grade of which reaches 8.8 or above, and after the bolts are tightened, the nuts are fixed by spot welding to reduce the risk of nut loosening. For another example, the first locking assembly 1160 can also adopt a buckle structure, the buckle is made of high-strength plastic, and is formed by injection molding, the first locking assembly 1160 can perfectly cooperate with the buckle groove on the first fixing belt 1130 and the limiting beams (the first limiting beam 1114 and the second limiting beam 1115) to realize quick installation and firm fixation.

[0108] The main body of the first fixing belt 1130 is made of metal material, so that the metal fixing belt 1131 can effectively resist the tensile force generated by the expansion of the battery monomer 1121 on the first limiting beam 1114 and the third limiting beam 1116, limit the relative displacement between the two, and reduce the risk of excessive deformation of the first limiting beam 1114 due to excessive force; the insulating layer 1132 plays a role in blocking current between the metal fixing belt 1131 and the battery monomer assembly 1120, reducing the occurrence of short circuit failure.

[0109] In the present embodiment, the first locking assembly 1160 can facilitate the disassembly of the first fixing belt 1130, and the first locking assembly 1160 can also enhance the connection strength between the first fixing belt 1130 and the first limiting beam 1114 and the third limiting beam 1116.

[0110] In some embodiments, referring to Figure 6 As shown, the second fixing belt 1140 is bonded to the battery monomer assembly 1120.

[0111] Specifically, the second fixing band 1140 can be made of glass fiber reinforced epoxy resin composite material, so that the second fixing band 1140 has appropriate strength and elasticity, and can play a restraining role on the battery monomer assembly 1120 between the second limiting beam 1115 and the third limiting beam 1116, while its lighter weight reduces the overall weight of the battery device 1100, which is conducive to improving the endurance of the electric device.

[0112] The bonding between the second fixing band 1140 and the battery monomer 1121 in the battery monomer assembly 1120 uses a high-performance structural adhesive, which has high strength, high elasticity and good aging resistance. Before bonding, the bonding surface of the second fixing band 1140 and the corresponding surface of the battery monomer 1121 are strictly pretreated, including cleaning, grinding and other processes, to improve the bonding strength of the adhesive. Then the adhesive is evenly applied on the bonding surface of the second fixing band 1140, the thickness can be 0.3-0.6mm, then the second fixing band 1140 is accurately pasted on the specified position of the battery monomer assembly 1120, and appropriate pressure is applied, so that the adhesive can fully fill the gap between the two, and finally curing is carried out under specified environmental conditions. The bonding strength after curing can reach more than 7MPa, which ensures that the second fixing band 1140 and the battery monomer assembly 1120 form a firm connection.

[0113] The second fixing band 1140 is bonded to the battery monomer 1121 of the battery monomer assembly 1120, so that the second fixing band 1140 and the battery monomer assembly 1120 become a whole. When the battery monomer 1121 expands, the second fixing band 1140 can directly generate a restraining force on the battery monomer 1121, effectively limiting the expansion amount of the battery monomer 1121. This direct restraining effect is more effective than simply relying on the connection between the second fixing band 1140 and the limiting beam to limit the expansion of the battery monomer assembly 1120, which can greatly improve the restraining effect on the battery monomer 1121 and reduce the structural deformation and damage of the battery monomer 1121 due to excessive expansion.

[0114] In this embodiment, by bonding the second fixing band 1140 to the battery monomer assembly 1120, the restraining ability of the second fixing band 1140 to the battery monomer assembly 1120 is significantly improved, so that the expansion of the battery monomer assembly 1120 during charging and discharging is more effectively controlled, thereby improving the structural stability and safety of the battery device 1100. In addition, the bonding method also reduces the relative movement between the second fixing band 1140 and the battery monomer assembly 1120, reduces the friction and wear between the two, and prolongs the service life of the second fixing band 1140 and the battery monomer assembly 1120.

[0115] In some embodiments, referring to Figures 7-11 As shown in the figure, the battery device 1100 further comprises an insulating piece 1170, which is arranged on the side of the first fixing band 1130 opposite to the battery monomer assembly 1120, and the first fixing band 1130 is connected to the battery monomer assembly 1120 through the insulating piece 1170.

[0116] Specifically, the insulating piece 1170 plays an insulating role, and is arranged between the first fixing band 1130 and the battery monomer assembly 1120, and plays a secondary insulating role, further reducing the probability of short-circuit failure.

[0117] For example, the insulating piece 1170 is made of ceramic material with excellent insulating performance, which has the characteristics of high temperature resistance, high pressure resistance, and stable insulating performance, and can maintain good insulating effect in the complex working environment of the battery device 1100. The shape of the insulating piece 1170 is a flat plate, the length of which matches the length of the first fixing band 1130, the width of which can be slightly larger than the width of the first fixing band 1130, and the thickness of which can be 5-8mm. The insulating piece 1170 can be fixed with the surface of the first fixing band 1130, and the insulating piece 1170 and the first fixing band 1130 can be directly bonded and fixed. The insulating piece 1170 is connected to the side of the first fixing band 1130 opposite to the battery monomer assembly 1120 through a high-strength insulating adhesive. The adhesive is selected from high-temperature and aging-resistant epoxy resin glue, which is evenly applied and has moderate thickness, so as to ensure that the insulating piece 1170 and the first fixing band 1130 can be tightly bonded, and the bonding strength reaches more than 10MPa, and the insulating piece 1170 is not easy to fall off during the long-term operation of the battery device 1100.

[0118] The insulating piece 1170 is located between the first fixing band 1130 and the battery monomer assembly 1120 and is connected to the first fixing band 1130 and the battery monomer 1121 in the battery monomer assembly 1120, respectively. The insulating piece 1170 can effectively block the current path between the first fixing band 1130 and the battery monomer assembly 1120, even if the insulating layer 1132 on the surface of the first fixing band 1130 is damaged, the insulating piece 1170 can also play a secondary insulating role, reducing the probability of short-circuit failure.

[0119] In addition, the ceramic material of the insulating piece 1170 has high hardness and wear resistance, which can reduce the direct friction between the first fixing band 1130 and the battery monomer assembly 1120, reduce the probability of damage to the insulating layer 1132 outside the first fixing band 1130, protect the shell of the battery monomer assembly 1120 from being damaged, and is beneficial to prolong the service life of the battery monomer 1121.

[0120] In the embodiment, the insulating piece 1170 has good insulation and wear resistance, which can effectively reduce the probability of short circuit failure, protect the battery monomer assembly 1120 and the first fixing belt 1130, reduce the failure rate of the battery device 1100, and improve the reliability and service life of the battery device 1100.

[0121] In some embodiments, referring to Figure 10 The insulating piece 1170 is bonded to the battery monomer assembly 1120.

[0122] Specifically, the insulating piece 1170 and the battery monomer 1121 in the battery monomer assembly 1120 can form a bonding structure 1136, which increases the bonding limit between the insulating piece 1170 and the battery monomer assembly 1120, further improves the limiting effect of the first fixing belt 1130 and the insulating piece 1170 on the battery monomer 1121, thereby reducing the displacement of the battery monomer 1121 due to expansion, and reducing the extrusion force of the battery monomer 1121 on the first, second and third limiting beams 1114, 1115 and 1116, and reducing the deformation of the three limiting beams.

[0123] The bonding structure 1136 between the insulating piece 1170 and the battery monomer assembly 1120 can use a battery-specific adhesive, which has excellent bonding, insulation and chemical corrosion resistance, and can form a firm bonding layer between the surface (specifically the top surface) of the battery monomer 1121 and the insulating piece 1170. During the bonding process, the surface of the battery monomer 1121 and the bonding surface of the insulating piece 1170 need to be strictly cleaned to remove impurities such as oil and dust, then evenly apply the adhesive, the thickness is controlled between 0.2-0.5mm, finally accurately place the insulating piece 1170 on the corresponding position of the battery monomer assembly 1120, apply a certain pressure and keep for a period of time, until the adhesive is completely cured. The curing time of the adhesive varies with the ambient temperature, generally between 24-48 hours, and the bonding strength after curing can reach more than 8MPa.

[0124] The insulating piece 1170 is bonded with the battery cell 1121 in the battery cell assembly 1120, so that the insulating piece 1170 and the battery cell assembly 1120 form an integral whole, reducing the displacement or falling off of the insulating piece 1170 due to factors such as vibration and impact during the operation of the battery device 1100. Through bonding, the insulating piece 1170 can always be kept in the correct position between the first fixing belt 1130 and the battery cell assembly 1120, continuously playing its insulation role, effectively blocking the current path between the first fixing belt 1130 and the battery cell assembly 1120. In addition, the bonding structure 1136 can also play a certain buffering role, reducing the impact of the battery cell assembly 1120 on the insulating piece 1170 during expansion and contraction, and protecting the insulating piece 1170 from damage.

[0125] In the present embodiment, the bonding between the insulating piece 1170 and the battery cell assembly 1120 limits the position, which can further improve the constraint of the first fixing belt 1130 and the insulating piece 1170 on the battery cell 1121, thereby facilitating the reduction of displacement of the battery cell 1121 due to expansion, and further reducing the extrusion force of the battery cell 1121 on the first limiting beam 1114, the second limiting beam 1115 and the third limiting beam 1116, and facilitating the reduction of the deformation amount of the three limiting beams.

[0126] In some embodiments, referring to Figure 10 As shown, the surface of the insulating piece 1170 opposite to the surface of the first fixing belt 1130 is formed with a receiving groove 1171, and the first fixing belt 1130 is received in the receiving groove 1171.

[0127] Specifically, the receiving groove 1171 plays a receiving and limiting role on the first fixing belt 1130. The receiving groove 1171 is formed on the side surface of the insulating piece 1170 facing the first fixing belt 1130. The receiving groove 1171 can be a shallow groove matching the shape of the first fixing belt 1130, and the depth of the receiving groove 1171 is 1-2 mm, which can enable part or all of the first fixing belt 1130 to be embedded in the insulating piece 1170, thereby improving the connection stability between the insulating piece 1170 and the first fixing belt 1130.

[0128] The receiving groove 1171 can effectively position the first fixing belt 1130. During the installation of the first fixing belt 1130, the receiving groove 1171 can guide the first fixing belt 1130 to quickly and accurately reach the designated position, improving the installation efficiency. In addition, the two side walls of the receiving groove 1171 limit the displacement of the first fixing belt 1130 in the horizontal direction, which can limit the lateral sliding of the first fixing belt 1130 during the operation of the battery device 1100.

[0129] The accommodating groove 1171 can effectively limit and fix the first fixing belt 1130, so that the first fixing belt 1130 always remains in the correct position, reduces the deviation of the first fixing belt 1130 due to vibration, stress and the like, and further enables the first fixing belt 1130 to uniformly bear the tension, thereby fully exerting the restraining effect of the first fixing belt 1130 on the first limiting beam 1114 and the third limiting beam 1116. Furthermore, the first fixing belt 1130 is accommodated in the accommodating groove 1171, which increases the contact area between the first fixing belt 1130 and the insulating member 1170, making the connection between them more secure, and further enhancing the insulation effect of the insulating member 1170 on the first fixing belt 1130.

[0130] In addition, considering the space utilization inside the battery device 1100, by opening the accommodating groove 1171 on the insulating member 1170 and accommodating the first fixing belt 1130 in the accommodating groove 1171, the space of the accommodating cavity in the box assembly 1110 in the vertical direction (i.e. the second direction Y) can be saved, thereby enabling the battery monomer 1121 to have a greater height in the vertical direction, thereby increasing the volume of the battery monomer 1121, which is beneficial to improve the energy density of the battery monomer assembly 1120 and the battery device 1100.

[0131] In the present embodiment, accommodating the first fixing belt 1130 in the accommodating groove 1171 of the insulating member 1170 can enhance the limiting and positioning effect of the first fixing belt 1130, and is beneficial to improve the space utilization inside the battery device 1100, and further improve the energy density of the battery device 1100.

[0132] In some embodiments, the two ends of the second fixing belt 1140 are respectively connected with the third limiting beam 1116 and the second limiting beam 1115.

[0133] Specifically, while being connected with the battery monomer 1121, the two ends of the second fixing belt 1140 can also be directly connected and fixed with the third limiting beam 1116 and the second limiting beam 1115, thereby directly restraining the relative movement between the second limiting beam 1115 and the third limiting beam 1116.

[0134] The battery device 1100 can further include a second locking assembly (not shown in the figure), and the two ends of the second fixing belt 1140 form locking portions, which are locked and fixed with the second limiting beam 1115 and the third limiting beam 1116 through the second locking assembly. The second fixing belt 1140 is more convenient to connect and disassemble with the third limiting beam 1116 and the second limiting beam 1115, and in the case of damage to the second fixing belt 1140, the second locking assembly can be directly disassembled to realize replacement of the second fixing belt 1140, which is more convenient for maintenance.

[0135] The second locking assembly can be made of components such as bolts and buckles. For example, the second locking assembly can be made of high-strength bolts. Alternatively, the second locking assembly can be made of a buckle structure made of high-strength plastic and molded using an injection molding process. The second locking assembly can perfectly cooperate with the slots on the second fixing strap 1140 and the limiting beams (first limiting beam 1114 and second limiting beam 1115), achieving quick installation and secure fixation.

[0136] In this embodiment, by connecting and fixing the second fixing belt 1140 to the second limiting beam 1115 and the third limiting beam 1116 respectively, the second fixing belt 1140 can limit the position of the battery cell 1121 while also limiting the deformation of the second limiting beam 1115 and the third limiting beam 1116, thereby further improving the stability of the battery device 1100 structure.

[0137] In some embodiments, reference Figure 3 and Figure 5 As shown, the first fixing belt 1130 and the second fixing belt 1140 are arranged collinearly or staggered in the extension direction.

[0138] Specifically, collinearity means that the first fixing belt 1130 and the second fixing belt 1140 extend in the same direction and along a straight line. Offset means that the first fixing belt 1130 and the second fixing belt 1140 extend in the same direction, but are staggered in a direction perpendicular to the extension direction, forming a certain offset interval.

[0139] For example, the first limiting beam 1114, the second limiting beam 1115, and the third limiting beam 1116 are all arranged to extend along the second direction Y, and the first fixing strap 1130 and the second fixing strap 1140 are both extended along the first direction X and arranged collinearly, with one end of the second fixing strap 1140 being close to or in contact with one end of the first fixing strap 1130. This collinear arrangement allows the first fixing strap 1130 and the second fixing strap 1140 to exert a uniform and continuous restraining force on the first limiting beam 1114, the second limiting beam 1115, the third limiting beam 1116, and the battery cell assembly 1120 in the first direction X.

[0140] When the first fixing belt 1130 and the second fixing belt 1140 are arranged at intervals in the second direction Y, the center lines of the first fixing belt 1130 and the second fixing belt 1140 are parallel to each other but do not overlap, and there is a certain distance between them in the second direction Y. The size of the distance is determined according to the number and arrangement of the battery cells 1121. For example, the spacing distance may be between 50-100 mm. This arrangement can avoid obstacles in the battery compartment 1117, such as the convergence component 1190, wiring harness, etc.

[0141] Whether collinear or staggered, the first fixing strap 1130 and the second fixing strap 1140 can each maintain a secure connection with the corresponding limiting beam or battery cell assembly 1120. When collinear, the restraining forces of the first fixing strap 1130 and the second fixing strap 1140 are in the same straight line, which can make the restraining force on the battery cell assembly 1120 in the first direction X more uniform, avoiding the situation where the battery cell assembly 1120 is subjected to excessive force in a certain area. This is particularly suitable for the battery compartment 1117 structure where the battery cell assemblies 1120 are neatly arranged and there are no obvious obstacles. When staggered, the fixing strap can flexibly avoid other components in the battery compartment 1117, making it less likely for the fixing strap to interfere with other components, ensuring that the fixing strap can be smoothly installed and exert its restraining effect. At the same time, the position of the fixing strap can be adjusted in a targeted manner according to the force conditions in different areas of the battery cell assembly 1120, making the restraining force distribution more reasonable.

[0142] Typically, the battery cell assembly 1120 includes multiple battery cell groups, and the multiple battery cell groups are arranged in the second direction Y. The battery cells 1121 in each battery cell group are stacked and arranged in the first direction X. Then, when the first fixing belt 1130 and the second fixing belt 1140 are collinear, a first fixing belt 1130 and a second fixing belt 1140 are collinear and form a group. This group of fixing belts is distributed above a battery cell group, and one such fixing belt combination can be distributed above each battery cell group.

[0143] In this embodiment, the collinear arrangement improves the uniformity of the restraining force and enhances the structural stability of the battery device 1100; the staggered arrangement enhances the flexibility and adaptability of the fixing belt arrangement and can better adapt to the complex internal environment of the battery compartment 1117; this diverse arrangement option enables the design of the battery device 1100 to be optimized according to actual needs, further enhancing the practicality and reliability of the battery device 1100.

[0144] In some embodiments, reference Figure 5 and Figure 6 As shown, the battery cell assembly 1120 includes a plurality of battery cell groups, each of which includes a plurality of battery cells 1121 stacked along a first direction X, and the plurality of battery cell groups are arranged in sequence along a second direction Y; the first fixing belt 1130 and the second fixing belt 1140 are both located above the battery cell group, and the battery device 1100 also includes a busbar 1190, which is located above the battery cell group and at one end in the first direction X. Corresponding to the battery cell group equipped with the busbar 1190, the second fixing belt 1140 is bonded to the top of the battery cell group.

[0145] The arrangement of the battery cells 1121 in the battery cell assembly 1120 can be specifically referred to in the above embodiment. In this example, the battery device 1100 is provided with a busbar 1190, which can be understood as a bar. The busbar 1190 is a bar connected between two battery cell groups, so the bar is also called a bridge bar. Typically, the busbar 1190 is arranged at one end of the battery cell group in the first direction X. When the busbar 1190 is located above the battery cell group, that is, when the busbar 1190 is located above the battery cell group, it will interfere with the fixing belt, affecting the connection between the fixing belt and the limiting beam.

[0146] Taking the above situation into consideration, for a battery cell group having a convergence component 1190 at its end, the battery cell group should be matched and arranged between the second limiting beam 1115 and the third limiting beam 1116, or in other words, the convergence component 1190 needs to be arranged at one end of the battery cell group close to the second limiting beam 1115, so that a second fixing belt 1140 is used between the second limiting beam 1115 and the third limiting beam 1116. The second fixing belt 1140 can be directly connected to the battery cell 1121 without being connected to the third limiting beam 1116, so that the second fixing belt 1140 does not interfere with the convergence component 1190.

[0147] In this embodiment, considering that interference is likely to occur between the convergence component 1190 and the fixing belt, when the convergence component 1190 is provided above one end of the battery cell group, a second fixing belt 1140 is configured corresponding to the battery cell group to limit it, so that the fixing belt is less likely to interfere with the convergence component 1190.

[0148] In some embodiments, reference Figure 7 and Figure 8 As shown, the first fixing belt 1130 includes a middle portion 1133, two connecting portions 1134 and two bending portions 1135. One end of the middle portion 1133 is connected to a corresponding connecting portion 1134 through a bending portion 1135, and the other end of the middle portion 1133 is connected to a corresponding connecting portion 1134 through another bending portion 1135. The middle portion 1133 is staggered with the connecting portion 1134 in a surface direction perpendicular to the middle portion 1133 by means of the bending portion 1135.

[0149] In view of the problem that the height of the battery monomer 1121 is inconsistent with the height of the first limiting beam 1114 and the third limiting beam 1116, the structure of the first fixed band 1130 is improved. Generally, the height of the upper surface of the battery monomer 1121 is higher than the height of the upper surface of the first limiting beam 1114 and the third limiting beam 1116, so the first fixed band 1130 is provided with a bending part 1135, and the intermediate part 1133 and the connecting part 1134 are connected through the bending part 1135, so that the first fixed band 1130 is formed at the position of the bending part 1135. The intermediate part 1133 can be matched and attached to the upper surface of the battery monomer 1121, and the connecting part 1134 can be correspondingly matched and connected to the upper surface of the first limiting beam 1114 and the third limiting beam 1116.

[0150] The intermediate part 1133 is the intermediate part 1133 of the first fixed band 1130, and the connecting part 1134 is located at the position of the two extension ends of the intermediate part 1133. Each connecting part 1134 is connected to the intermediate part 1133 through the bending part 1135, so that the first fixed band 1130 forms a stepped structure, thereby improving the rigidity of the first fixed band 1130 and improving the anti-deformation capability. The first fixed band 1130 as a whole can be prepared by stamping forming or injection molding process.

[0151] The intermediate part 1133 is the intermediate part 1133 of the first fixed band 1130, and the connecting part 1134 is located at the position of the two extension ends of the intermediate part 1133. Each connecting part 1134 is connected to the intermediate part 1133 through the bending part 1135, so that the first fixed band 1130 forms a stepped structure, thereby improving the rigidity of the first fixed band 1130 and improving the anti-deformation capability. The first fixed band 1130 as a whole can be prepared by stamping forming or injection molding process.

[0152] In the embodiment, the bending part 1135 is formed on the first fixed band 1130 to form a stepped structure of the first fixed band 1130, thereby improving the anti-deformation capability of the first fixed band 1130, and enabling the first fixed band 1130 to better match the upper surfaces of the battery monomer 1121 and the limiting beam, so that the first fixed band 1130 can maintain stable restraining effect under the condition of long-term bearing the expansion force of the battery monomer 1121.

[0153] In some embodiments, with reference to Figures 3-6As shown, the battery device 1100 further includes a third fixing belt 1150 , which is connected between the first position-limiting beam 1114 and the second position-limiting beam 1115 .

[0154] Specifically, the third fixing belt 1150 may be made of metal, and an insulating film may be provided on the outer surface of the third fixing belt 1150 to provide insulation between the third fixing belt 1150 and the battery cell 1121 and other components.

[0155] The third fixing belt 1150 may also be made of glass fiber reinforced polypropylene composite material. The above material has high strength, good toughness and corrosion resistance, and can meet the needs of long-term use.

[0156] The third securing strap 1150 spans between the first limiting beam 1114 and the second limiting beam 1115. The third securing strap 1150, along with the first and second limiting beams 1130 and 1140, forms a cross- or parallel constraint network, applying constraints to the battery cell assembly 1120 and the limiting beams from multiple angles, further limiting the expansion and displacement of the battery cell assembly 1120, the first limiting beam 1114, and the third limiting beam 1116. Especially when the battery cell assembly 1120 experiences significant expansion, the third securing strap 1150 can share the tension borne by the first and second limiting beams 1130 and 1140, reducing the load on a single securing strap and lowering the risk of damage to the first and second securing straps 1130 and 1140 due to overload.

[0157] In this embodiment, the addition of third securing strap 1150 further improves the restraint system of battery assembly 1100, providing multiple safeguards and significantly enhancing the battery assembly 1100's ability to resist expansion of battery cells 1121. The synergistic effect of third securing strap 1150, first securing strap 1130, and second securing strap 1140 ensures a more uniform restraint force on battery cell assembly 1120, further enhancing the structural stability and safety of battery assembly 1100.

[0158] In some embodiments, reference Figures 3-6 As shown, the battery device 1100 further includes a third locking assembly 1180 , and both ends of the third fixing belt 1150 are connected to the first limiting beam 1114 and the second limiting beam 1115 respectively through the third locking assembly 1180 .

[0159] Specifically, the ends of the third fixing strap 1150 are respectively connected to the first limiting beam 1114 and the second limiting beam 1115. The third fixing strap 1150 is connected to the first limiting beam 1114 and the second limiting beam 1115 via a third locking assembly 1180, thereby facilitating the detachability of the third fixing strap 1150. The third locking assembly 1180 can be a bolt or a buckle, which facilitates detachment while ensuring a secure connection.

[0160] Third locking assembly 1180 securely fastens both ends of third securing strap 1150 to first limiting beam 1114 and second limiting beam 1115, preventing third securing strap 1150 from loosening or falling off when subjected to force and effectively transmitting the restraining force. The varying locking force of third locking assembly 1180 allows for adjustment of the tension of third securing strap 1150, ensuring that third securing strap 1150 maintains appropriate tension for optimal restraint.

[0161] In this embodiment, the provision of the third locking assembly 1180 improves the reliability and convenience of the connection between the third fixing belt 1150 and the first limiting beam 1114 and the second limiting beam 1115, making the installation and disassembly of the third fixing belt 1150 more convenient and enabling it to better play its restraining role.

[0162] In some embodiments, the third fixing tape 1150 is bonded to the battery cell assembly 1120 .

[0163] Specifically, while the third fixing belt 1150 is connected to the first limiting beam 1114 and the second limiting beam 1115 , the third fixing belt 1150 is also fixed to the battery cell assembly 1120 by bonding, thereby further improving the effect of limiting and restraining the battery cell assembly 1120 .

[0164] The third fixing strap 1150 is bonded to the battery cell 1121 in the battery cell assembly 1120, so that the second fixing strap 1140 and the battery cell assembly 1120 become a whole, so that the third fixing strap 1150 can directly exert a restraining force on the battery cell 1121. When the battery cell 1121 expands, the third fixing strap 1150 can take effect in time to limit its expansion.

[0165] The direct bonding constraint between the third fixing belt 1150 and the battery cell 1121 is combined with the connection between the two ends of the third fixing belt 1150 and the limiting beam to form a double constraint on the battery cell assembly 1120, greatly improving the constraint effect.

[0166] In the embodiment, the third fixing belt 1150 is integrated with the battery monomer assembly 1120, further improving the constraint ability of the battery monomer assembly 1120, and the expansion of the battery monomer assembly 1120 is more effectively controlled. In addition, the bonding connection reduces the relative movement between the third fixing belt 1150 and the battery monomer assembly 1120, reduces friction and wear, prolongs the service life of the third fixing belt 1150 and the battery monomer assembly 1120, and improves the reliability of the battery device 1100.

[0167] In some embodiments, referring to Figures 3-6 As shown, the first fixing belt 1130 is provided with a plurality of first fixing belts 1130, each of which is arranged in the first direction X and spaced apart in the second direction Y. Corresponding to the first fixing belt 1130, the second fixing belt 1140 is provided with a plurality of second fixing belts 1140, each of which is arranged in the first direction X and spaced apart in the second direction Y. The battery device 1100 further comprises a plurality of third fixing belts 1150, each of which is arranged in the first direction X and connected between the first limiting beam 1114 and the second limiting beam 1115. The plurality of third fixing belts 1150 are spaced apart in the second direction Y. In the second direction Y, the plurality of third fixing belts 1150 and the plurality of first fixing belts 1130 or the plurality of second fixing belts 1140 are arranged alternately.

[0168] Specifically, the arrangement of the battery monomer 1121 in the battery monomer assembly 1120 can refer to the above-mentioned embodiments, which will not be repeated here. The first fixing belt 1130 and the second fixing belt 1140 are provided with a plurality of first fixing belts 1130 and a plurality of second fixing belts 1140, and one first fixing belt 1130 and one second fixing belt 1140 are arranged in the first direction X and form a fixing belt group. The fixing belt group forms a segmented arrangement between the first limiting beam 1114 and the second limiting beam 1115. The fixing belt group can be provided with a plurality of fixing belt groups, and the plurality of fixing belt groups are spaced apart in the second direction Y.

[0169] For the plurality of third fixing belts 1150, the extension direction of each third fixing belt 1150 is in the first direction X. In the second direction Y, the third fixing belt 1150 needs to be staggered and avoided with the first fixing belt 1130 and the second fixing belt 1140, and the interval distance between the third fixing belt 1150 and the first fixing belt 1130 or the second fixing belt 1140 can be 100-150mm. In the second direction Y, the plurality of third fixing belts 1150 and the plurality of first fixing belts 1130 or the plurality of second fixing belts 1140 are arranged alternately, that is, the arrangement mode of the first fixing belt 1130, the third fixing belt 1150, the first fixing belt 1130, the third fixing belt 1150…… or the second fixing belt 1140, the third fixing belt 1150, the second fixing belt 1140, the third fixing belt 1150…….

[0170] In the second direction Y, the plurality of third fixing belts 1150 are arranged alternately with the plurality of first fixing belts 1130 or the plurality of second fixing belts 1140, on one hand, the distribution density of the constraint force is enhanced, so that the battery monomer assembly 1120 can be effectively constrained in each area, and can better resist the expansion force of the battery monomer 1121 at different positions; on the other hand, the first limiting beam 1114, the second limiting beam 1115 and the third limiting beam 1116 can bear more uniform force in the second direction Y.

[0171] In the embodiment, the alternative arrangement of the plurality of fixing belts makes the constraint system of the battery device 1100 more perfect and uniform, greatly improves the overall constraint effect on the battery monomer assembly 1120, and reduces the deformation and damage of the battery monomer assembly 1120 due to uneven force. In addition, the plurality of fixing belts also improve the redundancy of the battery device 1100, so that even if an individual fixing belt fails, other fixing belts can still play a certain constraint role, thereby improving the reliability of the battery device 1100.

[0172] In a specific embodiment, referring to Figures 2-11As shown, the battery device 1100 comprises a battery cell assembly 1120, a box assembly 1110, a first fixing band 1130 and a second fixing band 1140, wherein the box assembly 1110 comprises a frame 1113, a first limiting beam 1114, a second limiting beam 1115 and a third limiting beam 1116 all connected to the frame 1113, the first limiting beam 1114 and the frame 1113 together enclose a battery compartment 1117 and an electrical compartment 1118 which are spaced apart, the second limiting beam 1115 and the third limiting beam 1116 are both located in the battery compartment 1117 and are oppositely arranged with the first limiting beam 1114, the second limiting beam 1115 is arranged in close contact with the frame 1113, and the third limiting beam 1116 is arranged between the first limiting beam 1114 and the second limiting beam 1115; the battery cell assembly 1120 is accommodated in the battery compartment 1117; the first fixing band 1130 is connected with the first limiting beam 1114 and the third limiting beam 1116 respectively; the second fixing band 1140 is arranged between the second limiting beam 1115 and the third limiting beam 1116 and is connected with the battery cell assembly 1120; the strength of the material used to prepare the first fixing band 1130 is higher than that of the material used to prepare the second fixing band 1140; the first fixing band 1130 comprises a metal fixing band 1131 and an insulating layer 1132 wrapped on the surface of the metal fixing band 1131, and both ends of the metal fixing band 1131 are fixed on the first limiting beam 1114 and the third limiting beam 1116 respectively; the second fixing band 1140 is a fixing band of composite material; the box assembly 1110 further comprises a first locking assembly 1160, both ends of the first fixing band 1130 are connected with the first limiting beam 1114 and the third limiting beam 1116 through the first locking assembly 1160; the second fixing band 1140 is bonded to the battery cell assembly 1120; the battery device 1100 further comprises an insulating piece 1170, the insulating piece 1170 is arranged on the side of the first fixing band 1130 opposite to the battery cell assembly 1120, and the first fixing band 1130 is connected with the battery cell assembly 1120 through the insulating piece 1170; the insulating piece 1170 is bonded with the battery cell assembly 1120; a receiving groove 1171 is formed on the surface of the insulating piece 1170 opposite to the surface of the first fixing band 1130, and the first fixing band 1130 is accommodated in the receiving groove 1171; the first fixing band 1130 and the second fixing band 1140 are arranged in the same line in the extension direction; the battery device 1100 further comprises a third fixing band 1150 connected between the first limiting beam 1114 and the second limiting beam 1115; the battery device 1100 further comprises a third locking assembly 1180, both ends of the third fixing band 1150 are connected with the first limiting beam 1114 and the second limiting beam 1115 through the third locking assembly 1180.

[0173] According to some embodiments of the present application, with reference to Figure 1As shown, the application also provides a power consuming device, which includes the battery device 1100 in the above embodiments, and the battery device 1100 is used to store or provide electric energy.

[0174] The technical solutions described in the embodiments of the application are applicable to various power consuming devices using battery cells, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles 1000, ships and spacecraft, such as aircraft, rockets, space shuttles and spacecraft.

[0175] The example of the power consuming device in the application is based on the example of the battery device 1100 described above, and the example of the power consuming device contains all the technical effects of the example of the battery device 1100 described above, and will not be repeated.

[0176] According to some embodiments of the application, the application also provides an energy storage device, which includes a power conversion device and the battery device 1100 in the above embodiments, and the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0177] Specifically, the energy storage device can include one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery devices 1100, and the plurality of battery devices 1100 are connected in series through the busbar component 1190 to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0178] The energy storage device can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems or temporary power supply systems, etc. The energy storage device can store electric energy as needed and output electric energy at appropriate times. For example, the energy storage device can store electric energy during the low valley of electricity consumption, and provide electric energy for related users or electric equipment during the peak of electricity consumption. The energy storage system provided in the embodiments of the application can be any power system that needs to use the energy storage device.

[0179] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0180] In some embodiments, the energy storage device can include a cabinet body and one or more battery clusters, and the battery clusters are contained in the cabinet body.

[0181] In some embodiments, the energy storage device can include a thermal management module, a master control module, a general control module, a power distribution module and a fire-fighting module.

[0182] As an example, the thermal management module can include a liquid cooling unit, and the liquid cooling unit provides cooling liquid for adjusting the temperature of the battery cells to each battery device 1100 through a pipeline.

[0183] As an example, the master module can be used as a battery management unit of the battery cluster, for monitoring and managing the battery cluster. The master module can monitor information such as current, voltage, power or temperature of the battery cluster. For example, the charging and discharging current, voltage, etc. of the battery cluster can be controlled. The master module includes a slave battery management unit (SBMU), a fusion switch and other modules.

[0184] As an example, the master module can be used as a battery management unit of the battery cluster, for monitoring and managing the battery cluster. The master module can monitor information such as current, voltage, power or temperature of the battery cluster. For example, the charging and discharging current, voltage, etc. of the battery cluster can be controlled. The master module includes a slave battery management unit (SBMU), a fusion switch and other modules.

[0185] As an example, the fire control module includes a control panel, a detector, an alarm device, etc., for detecting, alarming or extinguishing the energy storage system.

[0186] As an example, the power distribution module can be used to distribute power to the modules that need power in the energy storage device.

[0187] According to some embodiments of the present application, the present application also provides an energy storage system, which includes a power conversion device and the energy storage device in the above embodiments, and the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0188] In some embodiments, the energy storage system can include one or more energy storage devices and a power conversion device (PCS), and the power conversion device is used to connect between the power generation device and the energy storage device. The power generation device is used to generate electric energy, and the electric energy generated by the power generation device can be stored in the energy storage device through the power conversion device. As an example, the power generation device can be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device is not limited in the present application.

[0189] According to some embodiments of the present application, the present application also provides a charging network, which includes a charging pile and the energy storage device in the above embodiments or the energy storage system in the above embodiments, and the energy storage device is used to provide electric energy for the charging pile.

[0190] For example, the charging network includes a charging pile and an energy storage device, the charging pile is electrically connected with the energy storage device, and the energy storage device is used to provide electric energy for the charging pile. The charging pile is electrically connected with the battery device 1100 in the energy storage device through a cable, and the battery device 1100 can provide the stored electric energy to the charging pile. The charging pile has one or more connectors for connecting with the electric device (such as the vehicle 1000), so as to supply energy to the electric device.

[0191] The energy storage device can be located inside the charging pile (for example, a charging and storing integrated machine) or outside the charging pile.

[0192] The above is only a preferred embodiment of the present application, and only the technical principles of the present application are specifically described, and these descriptions are only for explaining the principles of the present application, and cannot be explained as a limitation on the protection scope of the present application in any way. Based on the explanation here, any modification, equivalent replacement and improvement made within the spirit and principle of the present application, and other specific embodiments of the present application which can be easily thought by those skilled in the art without creative labor, should be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: Battery cell assembly (1120); A box assembly (1110) comprises a frame (1113) and a first limiting beam (1114), a second limiting beam (1115) and a third limiting beam (1116) all connected to the frame (1113); the first limiting beam (1114) and the frame (1113) are jointly arranged to form a battery compartment (1117) and an electrical compartment (1118) arranged at intervals; the battery cell assembly (1120) is accommodated in the battery compartment (1117); the second limiting beam (1115) and the third limiting beam (1116) are both located in the battery compartment (1117) and are arranged opposite to the first limiting beam (1114); the second limiting beam (1115) is arranged in contact with the frame (1113); and the third limiting beam (1116) is arranged between the first limiting beam (1114) and the second limiting beam (1115); A first fixing belt (1130) is connected to the first limiting beam (1114) and the third limiting beam (1116), respectively; A second fixing belt (1140) is arranged between the second limiting beam (1115) and the third limiting beam (1116) and is connected to the battery cell assembly (1120).

2. The battery device according to claim 1, wherein: The strength of the material used to prepare the first fixing belt (1130) is higher than the strength of the material used to prepare the second fixing belt (1140).

3. The battery device according to claim 2, wherein: The first fixing belt (1130) comprises a metal fixing belt (1131) and an insulating layer (1132) wrapped around the surface of the metal fixing belt (1131); the two ends of the metal fixing belt (1131) are respectively fixed to the first limiting beam (1114) and the third limiting beam (1116); the second fixing belt (1140) is a fixing belt made of a composite material.

4. The battery device according to any one of claims 1 to 3, wherein: The box assembly (1110) further includes a first locking assembly (1160), and the two ends of the first fixing belt (1130) are respectively connected to the first limiting beam (1114) and the third limiting beam (1116) through the first locking assembly (1160).

5. The battery device according to any one of claims 1 to 3, characterized in that: The second fixing belt (1140) is bonded to the battery cell assembly (1120).

6. The battery device according to any one of claims 1 to 3, characterized in that: The battery device (1100) further includes an insulating member (1170), wherein the insulating member (1170) is disposed on a side of the first fixing belt (1130) opposite to the battery cell assembly (1120), and the first fixing belt (1130) is connected to the battery cell assembly (1120) via the insulating member (1170).

7. The battery device according to claim 6, wherein: The insulating member (1170) is bonded to the battery cell assembly (1120).

8. The battery device according to claim 6, wherein: An accommodating groove (1171) is formed on a surface of the insulating member (1170) opposite to the surface of the first fixing belt (1130), and the first fixing belt (1130) is accommodated in the accommodating groove (1171).

9. The battery device according to any one of claims 1 to 3, characterized in that: Both ends of the second fixing belt (1140) are respectively connected to the third limiting beam (1116) and the second limiting beam (1115).

10. The battery device according to any one of claims 1 to 3, characterized in that: The first fixing belt (1130) and the second fixing belt (1140) are arranged collinearly or staggered in the extension direction.

11. The battery device according to any one of claims 1 to 3, characterized in that: The battery cell assembly (1120) includes a plurality of battery cell groups, each of the battery cell groups includes a plurality of battery cells (1121) stacked and arranged along a first direction (X), and the plurality of battery cell groups are arranged in sequence along a second direction (Y); the first fixing belt (1130) and the second fixing belt (1140) are both located above the battery cell group, and the battery device (1100) further includes a confluence component (1190), the confluence component (1190) is located above the battery cell group and at one end in the first direction (X), and the second fixing belt (1140) is bonded to the top of the battery cell group corresponding to the battery cell group equipped with the confluence component (1190).

12. The battery device according to any one of claims 1 to 3, characterized in that: The first fixing belt (1130) includes a middle portion (1133), two connecting portions (1134) and two bending portions (1135), one end of the middle portion (1133) is connected to one connecting portion (1134) via one bending portion (1135), and the other end of the middle portion (1133) is connected to another connecting portion (1134) via another bending portion (1135), and the middle portion (1133) is staggered with the connecting portions (1134) in a surface direction perpendicular to the middle portion (1133) by means of the bending portions (1135).

13. The battery device according to any one of claims 1 to 3, characterized in that: The battery device (1100) further comprises a third fixing belt (1150), wherein the third fixing belt (1150) is connected between the first position-limiting beam (1114) and the second position-limiting beam (1115).

14. The battery device according to claim 13, wherein: The battery device (1100) further comprises a third locking assembly (1180), and both ends of the third fixing belt (1150) are respectively connected to the first limiting beam (1114) and the second limiting beam (1115) via the third locking assembly (1180).

15. The battery device according to claim 13, wherein: The third fixing belt (1150) is bonded to the battery cell assembly (1120).

16. The battery device according to claim 13, wherein: There are multiple first fixing belts (1130), and the multiple first fixing belts (1130) are all extended along the first direction (X) and arranged at intervals in the second direction (Y); matching the first fixing belts (1130), there are multiple second fixing belts (1140), and each second fixing belt (1140) is arranged collinearly with each first fixing belt (1130) in the first direction (X); the battery device (1100) also includes multiple third fixing belts (1150) all extended along the first direction (X), each third fixing belt (1150) is respectively connected between the first limiting beam (1114) and the second limiting beam (1115), and the multiple third fixing belts (1150) are arranged at intervals in the second direction (Y); in the second direction (Y), the multiple third fixing belts (1150) and the multiple first fixing belts (1130) or the multiple second fixing belts (1140) are arranged alternately in sequence.

17. An electrical device, characterized in that: The battery device (1100) comprises the battery device (1100) according to any one of claims 1 to 16, wherein the battery device (1100) is used for storing or providing electrical energy.

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