Buffer structure, battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and provides a buffer structure, a battery device and a power utilization device.The battery device comprises a box body, the buffer structure and a plurality of battery monomers, the buffer structure is arranged between the multiple arranged battery monomers and the corresponding edge beams, and the buffer structure is provided with a first surface which is arranged in the first direction and faces the multiple battery monomers; an adhesive layer is arranged on the first surface, and the first surface is connected to the plurality of battery monomers through the adhesive layer; the first surface is provided with an exhaust groove, and the exhaust groove extends in the direction parallel to the first surface and penetrates through the outside of the first surface. The rubber layer covers the exhaust groove and forms an exhaust channel, and the exhaust channel communicates with the outside of the buffer structure. According to the battery device provided by the embodiment of the invention, residual gas in the buffer structure is released under the guidance of the exhaust groove after standing for a period of time, so that the probability that the internal residual gas is released from the first surface to form a bulge to influence the bonding and fixing of the first surface and the adhesive layer is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the battery technical field, and particularly provides a buffer structure, a battery device and a power utilization device. BACKGROUND

[0002] In the production process of the battery device, a buffer block for preventing side impact needs to be arranged between the side beam of the box body and the battery monomer, and a glue layer needs to be arranged on the assembly surface of the buffer block to be adhesively assembled on the battery monomer. The lateral force is absorbed by the buffer block to reduce the damage to the internal battery monomer.

[0003] The buffer block is usually formed by injection molding of a high polymer material. After the production of the buffer block is completed and the buffer block is left for a period of time, the assembly surface of the buffer block will have bubble-shaped protrusions of different sizes due to the exhaust effect of the left buffer block. The bubble-shaped protrusions on the assembly surface will affect the adhesive bonding and fixing, so that the firmness of the buffer block adhesively assembled on the battery monomer through the glue layer is affected, the buffer block is prone to warping, and the installation efficiency is affected. CONTENT OF THE UTILITY MODEL

[0004] The application embodiment aims to provide a buffer structure, a battery device and a power utilization device, and aims to solve the problem that the buffer structure will form bubble-shaped protrusions on the surface under the exhaust effect of left standing and affect the adhesive assembly.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the application embodiment is as follows:

[0006] In a first aspect, the application embodiment provides a battery device, which comprises a box body, a buffer structure and a plurality of battery monomers. The box body comprises a bottom plate and side beams arranged on opposite sides of the bottom plate along a first direction. The plurality of battery monomers are arranged on the bottom plate along a second direction in sequence and are located between the two side beams arranged at intervals. The first direction is perpendicular to the second direction. The buffer structure is arranged between the plurality of battery monomers and the corresponding side beam. The buffer structure has a first surface arranged along the first direction and towards the plurality of battery monomers. A glue layer is arranged on the first surface, and the first surface is connected to the plurality of battery monomers through the glue layer. The first surface is provided with an exhaust groove extending along a direction parallel to the first surface and penetrating to the outside of the first surface. The glue layer covers the exhaust groove and forms an exhaust passage, and the exhaust passage is communicated to the outside of the buffer structure.

[0007] The battery device provided by the embodiments of the present application can facilitate the release of the residual gas in the buffer structure after a period of standing through the exhaust groove on the first surface of the buffer structure, thereby reducing the probability that the release of the residual gas from the first surface forms a bulge and affects the adhesion and fixation of the first surface and the adhesive layer. Meanwhile, the adhesive layer can cover the exhaust groove and form an exhaust passage when arranged on the first surface, and the exhaust passage can be connected to the outside of the buffer structure, so that the gas generated from the exhaust groove can be released outward along the exhaust passage, thereby effectively reducing the influence of the adhesive layer on the release of the residual gas.

[0008] In some embodiments, the exhaust groove comprises a first channel extending in a direction parallel to the first surface and connecting to the outside of the first surface, and the adhesive layer covers the first channel and forms an exhaust passage.

[0009] By adopting the above technical solution, the first channel extends in a direction parallel to the first surface and connects to the outside of the first surface, so that the adhesive layer arranged on the first surface covers the exhaust passage formed by the first channel and can be connected to the outside of the buffer structure in the extension direction of the first channel, and the residual gas released from the first channel after the buffer structure is stationary can be discharged outward along the exhaust passage.

[0010] In some embodiments, the exhaust groove further comprises a second channel extending in a direction parallel to the first surface and connecting to the outside of the first surface, and the second channel and the first channel are arranged in intersection, and the adhesive layer covers the second channel and forms an exhaust passage.

[0011] By adopting the above technical solution, the second channel extends in a direction parallel to the first surface and connects to the outside of the first surface, so that the adhesive layer arranged on the first surface covers the exhaust passage formed by the second channel and can be connected to the outside of the buffer structure in the extension direction of the first channel, and the residual gas released from the first channel after the buffer structure is stationary can be discharged outward along the exhaust passage; and the first channel and the second channel are arranged in intersection, so that the extension directions of the first channel and the second channel are different, and the distribution area of the first channel and the second channel on the first surface is larger, thereby further improving the probability of the release of the residual gas in the buffer structure from the first channel and the second channel after the buffer structure is stationary, and further reducing the probability of the formation of a bulge on the first surface.

[0012] In some embodiments, the first channel extends in a second direction, and the second channel extends in a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0013] By adopting the technical scheme, the first channel and the second channel are distributed perpendicularly on the first surface and form a grid shape, so as to improve the distribution range of the first channel and the second channel on the first surface, and further improve the range of the first channel and the second channel guiding the residual gas release path, and reduce the probability of forming a bulge due to the release of gas on the first surface.

[0014] In some embodiments, the number of the first channels is multiple, the multiple first channels are sequentially and spacedly distributed along the third direction, and the multiple first channels are symmetrically arranged about the central axis of the first surface; and / or, the number of the second channels is multiple, the multiple second channels are sequentially and spacedly distributed along the second direction, and the multiple second channels are symmetrically arranged about the central axis of the first surface.

[0015] By adopting the technical scheme, the multiple first channels are sequentially distributed along the third direction, so as to effectively improve the distribution range of the first channel on the first surface, and the multiple first channels are symmetrically arranged about the central axis of the first surface, so as to improve the uniformity of the distribution of the first channel, thereby further improving the guiding effect of the first channel on the residual gas release path; and / or, the multiple second channels are sequentially distributed along the second direction, so as to effectively improve the distribution range of the second channel on the first surface, and the multiple second channels are symmetrically arranged about the central axis of the first surface, so as to improve the uniformity of the distribution of the second channel, thereby further improving the guiding effect of the second channel on the residual gas release path.

[0016] In some embodiments, in the third direction, the spacing between the first channel adjacent to the outer edge portion of the first surface and the corresponding outer edge portion of the first surface is m, and m≥10mm; and / or, in the second direction, the spacing between the second channel adjacent to the outer edge portion of the first surface and the corresponding outer edge portion of the first surface is n, and n≥10mm.

[0017] By adopting the technical scheme, in the third direction, the spacing m between the first channel adjacent to the outer edge portion of the first surface and the corresponding outer edge portion of the first surface is limited to be greater than or equal to 10mm, so that the first channel can be arranged to be deviated from the central portion of the first surface, so as to improve the coverage range of the first channel guiding the gas release on the first surface; and / or, in the second direction, the spacing n between the second channel adjacent to the outer edge portion of the first surface and the corresponding outer edge portion of the first surface is limited to be greater than or equal to 10mm, so that the second channel can be arranged to be deviated from the central portion of the first surface, so as to improve the coverage range of the second channel guiding the gas release on the first surface.

[0018] In some embodiments, the width of the exhaust groove is k, and 1mm≤k≤3mm.

[0019] By adopting the technical scheme, the width k of the exhaust groove is limited to be greater than or equal to 1 mm and less than or equal to 3 mm, so that the exhaust groove has sufficient width to guide the release of the internal residual gas, and the probability of affecting the bonding effect of the adhesive layer due to the excessively wide width of the exhaust groove can be effectively reduced.

[0020] In some embodiments, the depth of the exhaust groove is h, and 1.5 mm≤h≤5 mm.

[0021] By adopting the technical scheme, the depth h of the exhaust groove is limited to be greater than or equal to 1.5 mm and less than or equal to 5 mm, so that the exhaust groove has sufficient depth to guide the release of the internal residual gas, and the probability of affecting the buffering effect due to the excessively deep depth of the exhaust groove affecting the strength of the buffering structure can be effectively reduced.

[0022] In some embodiments, the adhesive layer is provided with a gas permeable hole, and a portion of the first surface is communicated to the outside of the buffering structure through the gas permeable hole.

[0023] By adopting the technical scheme, a portion of the first surface can be exposed through the gas permeable hole, so that the portion of the first surface exposed to the gas permeable hole can release the internal residual gas, and the influence on the adhesive layer bonded and assembled to the first surface is low.

[0024] In some embodiments, at least part of the gas permeable hole is communicated to the exhaust passage.

[0025] By adopting the technical scheme, the internal residual gas released by the exhaust groove can pass through the exhaust passage and be discharged to the outside of the buffering structure through the gas permeable hole, so that the released gas can be smoothly discharged when the buffering structure is at rest.

[0026] In some embodiments, the buffering structure includes a base body and a plurality of buffering body portions arranged in sequence on the base body in the second direction, and the side of each buffering body portion away from the base body is the first surface. Each buffering body portion is provided with an exhaust groove and an adhesive layer on the first surface, and each buffering body portion is connected to a corresponding battery monomer through the adhesive layer.

[0027] By adopting the technical scheme, the base body can connect a plurality of buffering body portions and form a whole, and the plurality of buffering body portions can be connected to corresponding battery monomers, so that the buffering effect of the buffering structure on the plurality of battery monomers can be effectively improved. In addition, the first surface of each buffering body portion is provided with an exhaust groove to release the internal residual gas, so that the stability of each buffering body portion bonded and assembled to the battery monomer by the adhesive is better.

[0028] In a second aspect, the embodiments of the present application further provide a buffer structure, comprising a base body and a plurality of buffer body portions, the plurality of buffer body portions are sequentially and spacedly arranged on the same side of the base body, and each buffer body portion has a first surface on the side away from the base body; an exhaust groove is arranged on the first surface, and the exhaust groove extends along a direction parallel to the first surface and penetrates to the outside of the first surface; a glue layer is arranged on the first surface, and the glue layer covers the exhaust groove and forms an exhaust passage, and the exhaust passage is connected to the outside of the buffer structure.

[0029] The embodiments of the present application have the following beneficial effects: the buffer structure provided by the embodiments of the present application can effectively reduce the probability of forming a bulge on the first surface by arranging the exhaust groove on the first surface of each buffer body portion and guiding the release of internal residual gas by the exhaust groove, thereby improving the assembly stability of the buffer structure.

[0030] In a third aspect, the embodiments of the present application further provide an electric device, comprising the battery device or the buffer structure.

[0031] The embodiments of the present application have the following beneficial effects: the electric device provided by the embodiments of the present application comprises the battery device or the buffer structure, so that the stability and assembly efficiency of the electric device assembled with the buffer structure are more optimal. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or related technical descriptions. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0033] Figure 1 A structural schematic diagram of a vehicle provided by the embodiments of the present application;

[0034] Figure 2 An exploded view of a battery device provided by the embodiments of the present application;

[0035] Figure 3 A disassembled structural schematic diagram of a battery cell provided by the embodiments of the present application;

[0036] Figure 4 An assembly structural schematic diagram of a buffer structure and a battery cell provided by the embodiments of the present application;

[0037] Figure 5 A structural schematic diagram of a buffer structure provided by the embodiments of the present application;

[0038] Figure 6 A partial enlarged schematic diagram of A in FIG. 8; Figure 5 A partial enlarged schematic diagram of A in FIG. 8;

[0039] Figure 7 A partial view of a first surface of a buffer structure provided in an embodiment of the present application.

[0040] In the drawings:

[0041] 1000, vehicle;

[0042] 100, battery device; 200, controller; 300, motor;

[0043] 10, box; 11, first box; 12, second box; 111, bottom plate; 112, side beam;

[0044] 20, battery cell; 21, end cover; 21a, electrode terminal; 22, case; 23, electrode assembly; 23a, tab;

[0045] 30, buffer structure; 301, base portion; 302, buffer main body portion; 31, first surface; 311, exhaust groove; 311a, first channel; 311b, second channel; 312, exhaust passage;

[0046] 40, adhesive layer; 41, air hole;

[0047] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0048] Embodiments of the present application are described in detail below with reference to the attached drawings, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals are used throughout to designate the same or similar elements or elements having the same or similar functions. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application.

[0049] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as implying or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0051] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, 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-mentioned terms in the present application can be understood according to the specific circumstances.

[0052] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of water power, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, as well as industrial equipment and aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0053] In the production process of the battery device, a buffer block for preventing side impact is needed to be arranged between the side beam of the box body and the battery monomer, and a glue layer is arranged on the assembly surface of the buffer block to be bonded and assembled on the battery monomer. The lateral force is absorbed by the buffer block to reduce the damage to the internal battery monomer. The buffer block is usually made of high molecular material injection molding. After the production of the buffer block is completed and left for a period of time, the assembly surface will appear bubble-shaped protrusions of different sizes due to the exhaust effect of the buffer block. The bubble-shaped protrusions on the assembly surface will affect the adhesive bonding, so that the firmness of the buffer block bonded and assembled on the battery monomer through the glue layer will be affected, and the buffer block is prone to warping and other problems, which will affect the installation efficiency.

[0054] Based on the above considerations, in order to solve the problem that the buffer structure will form a bubble-shaped protrusion on the surface under the action of static exhaust, affecting the bonding assembly, a battery device is designed. By providing an exhaust groove on the first surface of the buffer structure of the battery device, and the exhaust groove extends in the direction parallel to the first surface and penetrates to the outside of the first surface, when the glue layer is arranged on the first surface, the glue layer can be arranged on the exhaust groove to form an exhaust passage, so that the exhaust passage can be connected to the outside of the buffer structure; After the buffer structure is static for a period of time, the residual gas in the interior can be released from the exhaust groove under the guidance of the exhaust groove, and the released gas can be discharged outward through the exhaust passage, thereby effectively reducing the probability of gas release from the first surface, and thereby reducing the probability of forming a bubble-shaped bulge on the first surface due to the release of gas; Therefore, the reliability of the adhesive bonding on the first surface is more optimal, and the stability of the buffer structure fixedly assembled on the surface of the battery monomer by the glue layer is also more optimal.

[0055] The battery device disclosed in the embodiments of the present application can be used in a power consumption device using the battery device as a power source or a variety of energy storage systems using the battery device as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0056] The following embodiments are described for convenience with a power consumption device of an embodiment of the present application as an example of a vehicle 1000.

[0057] Please refer to Figure 1 , Figure 1 The vehicle 1000 provided by some embodiments of the present application is a structural schematic diagram. The vehicle 1000 can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or an extended range car, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation and driving.

[0058] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 1000.

[0059] Please refer to Figure 2 , Figure 2 An exploded view of the battery device 100 is provided for some embodiments of the present application. The battery device 100 mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 20 connected in series, in parallel, or in a mixed connection through a busbar component.

[0060] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells 20.

[0061] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells 20 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 20 with a cable tie.

[0062] In some embodiments, the battery device can be a battery pack including a box 10 and one or more battery cell assemblies housed in the box 10.

[0063] As an example, the battery cell assembly can be a battery module, which can be housed in the box 10 by fixing the battery module in the box 10.

[0064] As an example, the battery cell assembly can also be housed in the box 10 by directly fixing a plurality of battery cells 20 in the box 10.

[0065] As an example, the box 10 can include a first box 11 and a second box 12. The first box 11 and the second box 12 are buckled so that an enclosed space is formed inside the box 10 to accommodate the battery cell assembly. Here, enclosed means covered or closed, which can be sealed or unsealed. The first box 11 can be a top cover or a bottom plate.

[0066] As an example, the box 10 can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame so that an enclosed space is formed inside the box 10 to accommodate the battery cell assembly.

[0067] In some embodiments, the box 10 can be part of the chassis structure of the vehicle 1000. For example, part of the box 10 can become at least part of the floor of the vehicle 1000, or part of the box 10 can become at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0068] The technical solutions described in the embodiments of the present application are applicable to various battery monomers 20 used in various electric devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spaceships.

[0069] In the embodiments of the present application, the battery monomer 20 can be a secondary battery, which refers to a battery monomer 20 that can be activated by charging after discharging.

[0070] The battery monomer 20 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the present application is not limited thereto.

[0071] Please refer to Figure 3 , Figure 3 The exploded structural diagram of the battery monomer 20 provided in some embodiments of the present application is shown. The battery monomer 20 refers to the smallest unit that constitutes a battery device. As shown in Figure 3 , the battery monomer 20 includes an end cover 21, a shell 22, an electrode assembly 23, and other functional components.

[0072] The end cover 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery monomer 20 from the external environment; the shape of the end cover 21 can be adapted to the shape of the shell 22 to fit the shell 22. Optionally, the end cover 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that the end cover 21 is not easily deformed when subjected to extrusion and impact, so that the battery monomer 20 can have higher structural strength, and the safety performance can also be improved. The end cover 21 can be provided with functional components such as electrode terminals 21a. The electrode terminals 21a can be used to electrically connect with the electrode assembly 23 for outputting or inputting the electrical energy of the battery monomer 20. In some embodiments, the end cover 21 can also be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery monomer 20 reaches a threshold value. The material of the end cover 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating piece can also be provided on the inner side of the end cover 21, which can be used to isolate the electrical connection components in the shell 22 from the end cover 21 to reduce the risk of short circuit. For example, the insulating piece can be plastic, rubber, etc.

[0073] The shell 22 is a component for cooperating with the end cover 21 to form an internal environment of the battery cell 20, and the formed internal environment can be used to accommodate the electrode assembly 23, electrolyte and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be provided on the shell 22, and the end cover 21 is used to cover the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 21 and the shell 22 can also be integrated, specifically, the end cover 21 and the shell 22 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 22, the end cover 21 is used to cover the shell 22. The shell 22 can be various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0074] The electrode assembly 23 is a component in which electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 23 can be contained in the shell 22. The electrode assembly 23 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion with active material constituting a main body of the electrode assembly, and a portion without active material of the positive electrode sheet and the negative electrode sheet respectively constituting the tab 23a. The positive electrode tab and the negative electrode tab can be located at one end of the main body or at two ends of the main body respectively. In the charging and discharging process of the battery device 100, the positive active material and the negative active material react with the electrolyte, and the tab 23a is connected to the electrode terminal 21a to form a current loop.

[0075] According to some embodiments of the present application, referring to Figure 2 , Figures 4 to 6 , the present application provides a battery device 100, comprising a box body 10, a buffer structure 30 and a plurality of battery cells 20, the box body 10 comprises a bottom plate 111 and a side beam 112 arranged on opposite sides of the bottom plate 111 in a first direction X, the plurality of battery cells 20 are arranged in sequence on the bottom plate 111 in a second direction Y, and the plurality of battery cells 20 are located between the two side beams 112 arranged at intervals, and the first direction X is perpendicular to the second direction Y; the buffer structure 30 is arranged between the plurality of battery cells 20 and the corresponding side beam 112, the buffer structure 30 has a first surface 31 arranged in the first direction X and towards the plurality of battery cells 20, the first surface 31 is provided with a glue layer 40, and the first surface 31 is connected to the plurality of battery cells 20 through the glue layer 40; wherein the first surface 31 is provided with an exhaust groove 311, the exhaust groove 311 extends in a direction parallel to the first surface 31 and penetrates to the outside of the first surface 31; the glue layer 40 covers the exhaust groove 311 and forms an exhaust passage 312, and the exhaust passage 312 communicates to the outside of the buffer structure 30.

[0076] The box body 10 comprises a bottom plate 111 and a side beam 112; wherein the bottom plate 111 refers to a support plate structure for supporting the battery monomer 20. Optionally, the bottom plate 111 can be, but is not limited to, a brazing plate, an extruded aluminum plate, etc.

[0077] The side beam 112 refers to a support protection structure arranged on the bottom plate 111 and used for forming protection on the side wall of the battery monomer 20. Optionally, the side beam 112 can be integrally formed on the bottom plate 111, for example, the bottom plate 111 and the side beam 112 are integrally extruded to form a whole structure; or the side beam 112 can be fixedly assembled on the bottom plate 111 by welding, for example, the side beam 112 is integrally formed on the bottom plate 111 by tailor welding.

[0078] In the first direction X, the opposite sides of the bottom plate 111 are arranged with the side beams 112 at intervals; for example, one side beam 112 can be arranged at the edge of each of the opposite sides of the bottom plate 111. In this way, the battery monomer 20 can be arranged between the opposite side beams 112, and the battery monomer 20 between the opposite side beams 112 is laterally protected.

[0079] The first direction X mentioned above can be any direction parallel to the bottom plate 111, for example, parallel to the length direction of the bottom plate 111, or parallel to the width direction of the bottom plate 111, etc.

[0080] The plurality of battery monomers 20 are arranged in sequence along the second direction Y on the bottom plate 111; optionally, the plurality of battery monomers 20 can be stacked and arranged in sequence with the larger area side surface facing the second direction Y. The battery monomer 20 can be fixedly connected to the bottom plate 111 by structural glue or other adhesive.

[0081] The second direction Y mentioned above can be any direction parallel to the bottom plate 111, for example, parallel to the length direction of the bottom plate 111, or parallel to the width direction of the bottom plate 111, etc. For example, in some embodiments, the first direction X can be the width direction of the bottom plate 111, and the second direction Y can be the length direction of the bottom plate 111.

[0082] The buffer structure 30 refers to a structural member with better buffering effect. For example, the material of the buffer structure 30 can be polypropylene, polytetrafluoroethylene, silica gel material, etc.

[0083] The buffer structure 30 is arranged between the plurality of battery monomers 20 and the corresponding side beams 112; for example, in some embodiments, the buffer structure 30 is arranged between one side of the plurality of battery monomers 20 and the side beam 112 on which the side is located in the first direction X; or, the buffer structure 30 is arranged on both opposite sides of the plurality of battery monomers 20 in the first direction X, so that the buffer structure 30 is arranged between the side beams 112 and the battery monomers 20 on both opposite sides.

[0084] In this way, the buffer structure 30 can form a buffering protection effect between the side beam 112 and the battery monomer 20, can absorb the lateral collision force received by the battery device 100, and can also effectively reduce the probability of damage to the battery monomer 20 caused by the rigid contact between the battery monomer 20 and the side beam 112.

[0085] Optionally, the buffer structure 30 can be a block-shaped structure, so that the buffer structure 30 can be simultaneously bonded and assembled on the side walls of the plurality of battery monomers 20 arranged along the second direction Y; or, a plurality of buffer blocks can be arranged on the buffer structure 30, so that each buffer block can be connected to the side wall of each battery monomer 20 to achieve comprehensive protection for each battery monomer 20.

[0086] The buffer structure 30 has a first surface 31; it can be understood that the first surface 31 refers to a side wall surface used to form a connection assembly with the battery monomer 20. The first surface 31 is located on one side of the buffer structure 30 along the first direction X and towards the plurality of battery monomers 20, so that the first surface 31 can be bonded and fixed on the plurality of first battery monomers 20 by the adhesive layer 40.

[0087] The adhesive layer 40 described above can use a double-sided adhesive structure such as double-sided tape.

[0088] The first surface 31 is provided with an exhaust groove 311; the exhaust groove 311 refers to a groove structure opened on the first surface 31.

[0089] It can be understood that by opening the exhaust groove 311 on the first surface 31, the exhaust groove 311 can guide the residual gas inside the buffer structure 30, so that the gas inside the buffer structure 30 can be released from the exhaust groove 311 when it is released outward; in this way, the probability of forming a bubble-shaped protrusion due to the release of internal residual gas from the first surface 31 can be effectively reduced.

[0090] Optionally, the number of exhaust grooves 311 can be one, two or any number of more than two; when the number of exhaust grooves 311 is more than one, the plurality of exhaust grooves 311 can be distributed in any manner, for example, in parallel, intersecting, or other distribution manners on the first surface 31.

[0091] The extending direction of the exhaust groove 311 can extend along any straight line direction parallel to the first surface 31, or can be arc-shaped or ring-shaped, etc.

[0092] For example, in some embodiments, the plurality of exhaust grooves 311 can extend along a straight line, and the plurality of exhaust grooves 311 can be distributed on the first surface 31 to form a mesh structure.

[0093] The adhesive layer 40 covers the exhaust groove 311 and forms an exhaust passage 312. Thus, when the residual gas in the buffer structure 30 is guided by the exhaust groove 311 and released from the exhaust groove 311, the released gas can flow in the exhaust passage 312 formed by the adhesive layer 40 and the inner wall of the exhaust groove 311.

[0094] The exhaust groove 311 extends in a direction parallel to the first surface 31 and penetrates to the outside of the first surface 31. Thus, the exhaust passage 312 formed by the adhesive layer 40 covering the exhaust groove 311 can be connected to the outside of the buffer structure 30 from the penetration. In this way, the adhesive layer 40 covers the exhaust groove 311 to form an exhaust passage 312, which can also extend in the extending direction of the exhaust groove 311 and be connected to the outside of the buffer structure 30. In this way, the gas released from the exhaust groove 311 can be discharged outward.

[0095] Alternatively, in some embodiments, a through hole can also be formed in the adhesive layer 40, so that the exhaust passage 312 formed by the adhesive layer 40 covering the exhaust groove 311 is connected to the outside through the through hole. In this way, the gas released from the exhaust groove 311 can be discharged outward.

[0096] The battery device 100 provided by the embodiments of the present application can reduce the probability that the residual gas in the buffer structure 30 releases from the first surface 31 to form a bulge and affect the adhesion and fixation of the first surface 31 and the adhesive layer 40 by opening the exhaust groove 311 on the first surface 31 of the buffer structure 30, so that the residual gas in the buffer structure 30 is guided and released from the exhaust groove 311 after a period of time. At the same time, when the adhesive layer 40 is arranged on the first surface 31, it can cover the exhaust groove 311 and form an exhaust passage 312, and the exhaust passage 312 can be connected to the outside of the buffer structure 30. Thus, the gas generated from the exhaust groove 311 can be released outward along the exhaust passage 312, so as to effectively reduce the influence of the adhesive layer 40 on the release of residual gas.

[0097] Please refer to Figures 5 to 7 In some embodiments, the exhaust groove 311 includes a first channel 311a extending in a direction parallel to the first surface 31 and penetrating to the outside of the first surface 31, and the adhesive layer 40 covers the first channel 311a to form an exhaust passage 312.

[0098] The air vent groove 311 comprises a first groove 311a, which refers to a groove structure formed on the first surface 31. Optionally, the number of the first grooves 311a is one or more, such as two, three, etc.; and when the number of the first grooves 311a is more than one, the first grooves 311a can be arranged in parallel and spaced apart.

[0099] The first groove 311a extends along a direction parallel to the first surface 31 and penetrates to the outside of the first surface 31. Thus, when the adhesive layer 40 covers the first groove 311a and forms the air vent passage 312, the air vent passage 312 can be connected to the outside of the buffer structure 30 along the extension direction of the first groove 311a; so that the internal residual gas released at the first groove 311a can be discharged outward along the air vent passage 312 formed by the first groove 311a.

[0100] Optionally, the extension direction of the first groove 311a can be parallel to the second direction Y, or the extension direction of the first groove 311a can be arranged along a direction intersecting the second direction Y, such as a direction perpendicular to the second direction Y.

[0101] Thus, the first groove 311a extends along a direction parallel to the first surface 31 and is connected to the outside of the first surface 31. Thus, the adhesive layer 40 arranged on the first surface 31 covers the air vent passage 312 formed by the first groove 311a, which can be connected to the outside of the buffer structure 30 along the extension direction of the first groove 311a. The residual gas released from the first groove 311a after the buffer structure 30 is placed can be discharged outward along the air vent passage 312.

[0102] Please refer to Figures 5 to 7 In some embodiments, the air vent groove 311 further comprises a second groove 311b, which extends along a direction parallel to the first surface 31 and penetrates to the outside of the first surface 31. The second groove 311b and the first groove 311a are arranged in intersection. The adhesive layer 40 covers the second groove 311b and forms the air vent passage 312.

[0103] The air vent groove 311 comprises a second groove 311b, which refers to a groove structure formed on the first surface 31. Optionally, the number of the second grooves 311b is one or more, such as two, three, etc.; and when the number of the second grooves 311b is more than one, the second grooves 311b can be arranged in parallel and spaced apart.

[0104] The second channel 311b extends in a direction parallel to the first surface 31 and penetrates to the outside of the first surface 31. Thus, when the adhesive layer 40 covers the second channel 311b and forms an exhaust channel 312, the exhaust channel 312 can extend along the extension direction of the second channel 311b and connect to the outside of the buffer structure 30. This allows the internal residual gas released at the second channel 311b to be discharged outward along the exhaust channel 312 formed by the second channel 311b.

[0105] The second channel 311b and the first channel 311a are arranged intersectingly; thus, the first channel 311a and the second channel 311b can be staggered and used together to guide the release of residual gas inside. Exemplarily, in some embodiments, the first channel 311a and the second channel 311b can be arranged perpendicularly.

[0106] Optionally, the extension direction of the first channel 311a may be parallel to the second direction Y, or the extension direction of the first channel 311a may be set along a direction intersecting the second direction Y, for example, a direction perpendicular to the second direction Y.

[0107] For example, in some embodiments, the extension direction of the first channel 311a may be parallel to the second direction Y, the extension direction of the second channel 311b may be along a direction perpendicular to the second direction Y, and the first channel 311a and the second channel 311b intersect.

[0108] With this configuration, the second channel 311b extends parallel to the first surface 31 and connects to the outside of the first surface 31. Thus, the adhesive layer 40 disposed on the first surface 31 covers the exhaust channel 312 formed by the second channel 311b, which can connect to the outside of the buffer structure 30 along the extension direction of the first channel 311a. After the buffer structure 30 has been left to stand, the residual gas released from the first channel 311a can be discharged outward along the exhaust channel 312. Furthermore, by intersecting the first channel 311a and the second channel 311b, the extension directions of the first channel 311a and the second channel 311b are different, and the distribution area of ​​the first channel 311a and the second channel 311b on the first surface 31 is larger. Therefore, the probability of residual gas inside the buffer structure 30 being guided and released from the first channel 311a and the second channel 311b after standing can be further increased, thereby further reducing the probability of bulges forming on the first surface 31.

[0109] Please refer to Figures 5 to 7 In some embodiments, the first channel 311a extends along the second direction Y, and the second channel 311b extends along the third direction Z, wherein the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0110] In the embodiment, the extending direction of the first groove 311a is parallel to the second direction Y, that is, the extending direction of the first groove 311a is the same as the distribution direction of the plurality of battery cells 20. The first groove 311a can form an internal residual gas release guide function for the corresponding region of the first surface 31, so as to reduce the probability of forming bubbles or protrusions on the first surface 31.

[0111] Meanwhile, the extending direction of the second groove 311b is parallel to the third direction Z, that is, perpendicular to the first direction X and the second direction Y, that is, the height direction of the battery cell 20. The second groove 311b can form an internal residual gas release guide function for the corresponding region of the first surface 31, so as to reduce the probability of forming bubbles or protrusions on the first surface 31.

[0112] For example, in some embodiments, the number of second grooves 311b can be multiple, for example, the number of second grooves 311b can be greater than or equal to the number of rows of battery cells 20 arranged along the second direction Y; in this way, the first surface 31 is provided with a second groove 311b at the bonding position of each battery cell 20, and the second groove 311b is used to guide the release of gas, which can effectively reduce the probability of forming bubble-shaped protrusions at the bonding position of the first surface 31 and the battery cell 20, thereby affecting the bonding and assembly effect.

[0113] In this way, the first groove 311a and the second groove 311b are distributed perpendicularly on the first surface 31 and form a grid shape, so as to improve the distribution range of the first groove 311a and the second groove 311b on the first surface 31, and further improve the range of the residual gas release path guided by the first groove 311a and the second groove 311b, thereby reducing the probability of forming a bulge due to the release of gas on the first surface 31.

[0114] For reference Figures 5 to 7 In some embodiments, the number of first grooves 311a is multiple, the plurality of first grooves 311a are sequentially and spacedly distributed along the third direction Z, and the plurality of first grooves 311a are symmetrically arranged about the central axis of the first surface 31; and / or, the number of second grooves 311b is multiple, the plurality of second grooves 311b are sequentially and spacedly distributed along the second direction Y, and the plurality of second grooves 311b are symmetrically arranged about the central axis of the first surface 31.

[0115] In the embodiment, the number of first grooves 311a is multiple, for example, two, three or any multiple of more than three.

[0116] The plurality of first grooves 311a are arranged in sequence and at intervals along the third direction Z, and each first groove 311a extends along the second direction Y; in this way, the plurality of first grooves 311a can be distributed along the third direction Z on the first surface 31 and guide the path for releasing the internal residual gas of the first surface 31, so as to reduce the probability of bubbles or protrusions on the first surface 31.

[0117] The plurality of first grooves 311a are arranged symmetrically about the central axis of the first surface 31; in this way, the plurality of first grooves 311a can be uniformly distributed along the third direction Z on the first surface 31, so that the guiding effect of the plurality of first grooves 311a on the first surface 31 for releasing the internal residual gas is more optimal.

[0118] For example, in some embodiments, the number of first grooves 311a can be two, and the two first grooves 311a can be arranged symmetrically along the third direction Z and about the central axis of the first surface 31.

[0119] For example, in some embodiments, the number of first grooves 311a can be two, and the two first grooves 311a can be arranged symmetrically along the third direction Z and about the central axis of the first surface 31.

[0120] The plurality of second grooves 311b are arranged in sequence and at intervals along the second direction Y, and each second groove 311b extends along the third direction Z; in this way, the plurality of second grooves 311b can be distributed along the second direction Y on the first surface 31 and guide the path for releasing the internal residual gas of the first surface 31, so as to reduce the probability of bubbles or protrusions on the first surface 31.

[0121] The plurality of second grooves 311b are arranged symmetrically about the central axis of the first surface 31; in this way, the plurality of second grooves 311b can be uniformly distributed along the second direction Y on the first surface 31, so that the guiding effect of the plurality of second grooves 311b on the first surface 31 for releasing the internal residual gas is more optimal.

[0122] For example, in some embodiments, the number of second grooves 311b can be multiple, for example, twice the number of rows of the plurality of battery monomers 20 arranged along the first direction X, that is, two second grooves 311b are distributed at the bonding position of each battery monomer 20 corresponding to the first surface 31; at the same time, the plurality of first grooves 311a along the second direction Y can be arranged symmetrically about the central axis of the first surface 31.

[0123] In this way, the plurality of first grooves 311a are arranged in sequence along the third direction Z, so as to effectively increase the distribution range of the first grooves 311a on the first surface 31, and the plurality of first grooves 311a are symmetrically arranged about the central axis of the first surface 31, so as to improve the uniformity of the distribution of the first grooves 311a, thereby further improving the guiding effect of the first grooves 311a on the residual gas release path; and / or, the plurality of second grooves 311b are arranged in sequence along the second direction Y, so as to effectively increase the distribution range of the second grooves 311b on the first surface 31, and the plurality of second grooves 311b are symmetrically arranged about the central axis of the first surface 31, so as to improve the uniformity of the distribution of the second grooves 311b, thereby further improving the guiding effect of the second grooves 311b on the residual gas release path.

[0124] Please refer to Figures 5 to 7 In some embodiments, in the third direction Z, the distance between the first groove 311a adjacent to the outer edge of the first surface 31 and the corresponding outer edge of the first surface 31 is m, and m≥10mm; and / or, in the second direction Y, the distance between the second groove 311b adjacent to the outer edge of the first surface 31 and the corresponding outer edge of the first surface 31 is n, and n≥10mm.

[0125] It can be understood that when the number of the first grooves 311a is one, the distance between the first groove 311a and the side edge of the first surface 31 closer to the first groove 311a in the third direction Z is m.

[0126] Alternatively, when the number of the first grooves 311a is two or more, in the third direction Z, the distance between the outer edge of the first surface 31 and the first groove 311a adjacent to the outer edge of the first surface 31 is m.

[0127] And / or, when the number of the second grooves 311b is one, the distance between the second groove 311b and the side edge of the first surface 31 closer to the second groove 311b in the second direction Y is n.

[0128] Alternatively, when the number of the second grooves 311b is two or more, in the second direction Y, the distance between the outer edge of the first surface 31 and the second groove 311b adjacent to the outer edge of the first surface 31 is n.

[0129] In this way, in the third direction Z, the distance m between the first groove 311a adjacent to the outer edge portion of the first surface 31 and the corresponding outer edge portion of the first surface 31 is limited to be greater than or equal to 10 mm (millimeters), so that the first groove 311a can be arranged to deviate from the outer edge portion of the first surface 31 to the middle portion of the first surface 31, so as to improve the coverage range of the first groove 311a in guiding the release of the gas on the first surface 31; and / or in the second direction Y, the distance n between the second groove 311b adjacent to the outer edge portion of the first surface 31 and the corresponding outer edge portion of the first surface 31 is limited to be greater than or equal to 10 mm, so that the second groove 311b can be arranged to deviate from the outer edge portion of the first surface 31 to the middle portion of the first surface 31, so as to improve the coverage range of the second groove 311b in guiding the release of the gas on the first surface 31.

[0130] For reference Figures 5 to 7 In some embodiments, the width of the exhaust groove 311 is k, and 1 mm≤k≤3 mm.

[0131] It can be understood that the width k of the exhaust groove 311 refers to the groove width of the groove structure of the exhaust groove 311. When the exhaust groove 311 includes the first groove 311a and the second groove 311b, the width of any one of the first groove 311a and the second groove 311b is the width of the exhaust groove 311.

[0132] In this embodiment, the width k of the exhaust groove 311 is limited to be greater than or equal to 1 mm and less than or equal to 3 mm, and exemplarily, the width k of the exhaust groove 311 can be but is not limited to 1 mm, 1.2 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2 mm, 2.1 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.7 mm, 2.9 mm, 3 mm, etc.

[0133] In this way, the width k of the exhaust groove 311 is limited to be greater than or equal to 1 mm and less than or equal to 3 mm, so that the exhaust groove 311 has sufficient width to guide the release of the internal residual gas, and the probability of affecting the bonding effect of the adhesive layer 40 due to the excessively wide width of the exhaust groove 311 can be effectively reduced.

[0134] For reference Figures 5 to 7 In some embodiments, the depth of the exhaust groove 311 is h, and 1.5 mm≤h≤5 mm.

[0135] It can be understood that the depth h of the exhaust groove 311 refers to the groove depth of the groove structure of the exhaust groove 311 along the first direction X.

[0136] In the embodiment, the depth h of the exhaust groove 311 is limited to be greater than or equal to 1.5 mm and less than or equal to 5 mm. For example, the depth h of the exhaust groove 311 can be, but is not limited to, 1.5 mm, 1.8 mm, 2 mm, 2.3 mm, 2.5 mm, 2.7 mm, 3 mm, 3.1 mm, 3.6 mm, 3.9 mm, 4 mm, 4.1 mm, 4.5 mm, 4.7 mm, 5 mm, etc.

[0137] In this way, the depth h of the exhaust groove 311 is limited to be greater than or equal to 1.5 mm and less than or equal to 5 mm. In this way, the exhaust groove 311 can have sufficient depth to guide the release of internal residual gas, and the probability of affecting the strength of the buffer structure 30 and affecting the buffering effect due to the excessive depth of the exhaust groove 311 can be effectively reduced.

[0138] Please refer to Figures 5 to 7 In some embodiments, the air-permeable hole 41 is formed in the adhesive layer 40, and part of the first surface 31 is communicated to the outside of the buffer structure 30 through the air-permeable hole 41.

[0139] The air-permeable hole 41 refers to a through structure penetrating the adhesive layer 40 along the thickness direction of the adhesive layer 40.

[0140] The air-permeable hole 41 can be a circular through hole, a triangular through hole, a rectangular through hole, a polygonal through hole, or an irregularly shaped through hole. The number of through holes can be one, two, or any multiple of two or more.

[0141] For example, in some embodiments, the air-permeable hole 41 can be a circular hole structure, and the number of air-permeable holes 41 is multiple. The multiple air-permeable holes 41 can be distributed in an array along the second direction Y and the third direction Z.

[0142] In this way, part of the first surface 31 can be exposed through the air-permeable hole 41. In this way, the part of the first surface 31 exposed to the air-permeable hole 41 can release internal residual gas, and the influence on the adhesive layer 40 bonded and assembled to the first surface 31 is lower.

[0143] Please refer to Figures 5 to 7 In some embodiments, the air-permeable hole 41 is communicated to the exhaust passage 312.

[0144] In the embodiment, at least one air-permeable hole 41 can be communicated to the exhaust passage 312.

[0145] Exemplarily, in some embodiments, the plurality of air vents 41 can be arranged in an array, when the exhaust groove 311 comprises a first groove arranged along the second direction Y and a second groove arranged along the third direction Z, the distribution position of at least one column of the plurality of air vents 41 arranged along the second direction Y on the first surface 31 can be the same as the distribution position of one of the first grooves, so that the air vents 41 in this column can be communicated with the exhaust passage 312 formed by the first grooves; and / or, among the plurality of air vents 41 arranged in an array, the distribution position of at least one row of the plurality of air vents 41 arranged along the third direction Z on the first surface 31 can be the same as the distribution position of one of the second grooves, so that the air vents 41 in this row can be communicated with the exhaust passage 312 formed by the second grooves.

[0146] In this way, the internal residual gas released by the exhaust groove 311 can be guided to pass through the exhaust passage 312 and be discharged to the outside of the buffer structure 30 through the air vents 41, so that the released gas can be smoothly discharged when the buffer structure 30 is at rest.

[0147] Please refer to Figures 4 to 6 In some embodiments, the buffer structure 30 comprises a base body 301 and a plurality of buffer body parts 302 arranged in sequence along the second direction Y on the base body 301, the side of each buffer body part 302 away from the base body 301 is the first surface 31, and the first surface 31 of each buffer body part 302 is provided with an exhaust groove 311 and a glue layer 40, and each buffer body part 302 is connected to the corresponding battery monomer 20 through the glue layer 40.

[0148] The buffer structure 30 comprises a base body 301 and a plurality of buffer body parts 302; wherein the buffer body part 302 refers to the part for connecting with the corresponding battery monomer 20 and capable of forming a buffer protection for the battery monomer 20. The number of buffer body parts 302 is multiple, for example, the number of columns of battery monomers 20 arranged along the second direction Y, so that each buffer body part 302 can connect the corresponding column of battery monomers 20.

[0149] The base body 301 is used for connecting the plurality of buffer body parts 302, so that the plurality of buffer body parts 302 can be connected to form a whole through the base body 301. Exemplarily, in some embodiments, the buffer structure 30 can be formed by injection molding, so that the plurality of buffer body parts 302 can be integrally formed on the base body 301.

[0150] In the second direction Y, the plurality of buffer body parts 302 are arranged in sequence; that is, the arrangement direction of the plurality of buffer body parts 302 is consistent with the arrangement direction of the plurality of battery monomers 20. In some embodiments, the plurality of battery monomers 20 arranged in the second direction Y can be fixed by the plurality of buffer body parts 302 one by one corresponding to the end of the side beam 112 adjacent to the side beam 112.

[0151] The side of each buffer body part 302 away from the base part 301 is the first surface 31, and thus the first surface 31 of each buffer body part 302 is provided with an exhaust groove 311, which serves to guide the release of residual gas inside the buffer body part 302, thereby reducing the probability of the first surface 31 of each buffer body part 302 forming a bubble-shaped protrusion, so that the reliability of each buffer body part 302 being fixed to the corresponding battery monomer 20 by the adhesive layer 40 is more optimal.

[0152] Optionally, in the present embodiment, the adhesive layer 40 provided on the first surface 31 of each buffer body part 302 can be provided with a breathable hole 41.

[0153] In this way, the base part 301 can connect the plurality of buffer body parts 302 and form a whole, and the plurality of buffer body parts 302 can be connected to the corresponding battery monomers 20 respectively, so that the buffering effect of the buffer structure 30 on the plurality of battery monomers 20 can be effectively improved; and the first surface 31 of each buffer body part 302 is provided with an exhaust groove 311 to release the internal residual gas, so that the stability of each buffer body part 302 being fixed to the battery monomer 20 by the adhesive is more optimal.

[0154] In the following, the battery device 100 provided by the present application will be further introduced according to specific embodiments.

[0155] Please refer to Figures 4 to 7 In the present embodiment, a battery device 100 is provided, which comprises a box body 10, a buffer structure 30 and a plurality of battery monomers 20. The box body 10 comprises a bottom plate 111 and side beams 112 arranged on opposite sides of the bottom plate 111 at intervals in a first direction X. The plurality of battery monomers 20 are arranged in sequence on the bottom plate 111 in a second direction Y, and the plurality of battery monomers 20 are located between the two side beams 112 arranged at intervals. The first direction X is perpendicular to the second direction Y.

[0156] The buffer structure 30 comprises a base body 301 and a plurality of buffer body parts 302 arranged in sequence on the base body 301 along the second direction Y, and each buffer body part 302 has a first surface 31 on a side away from the base body 301. The first surface 31 of each buffer body part 302 is provided with an exhaust groove 311 and a glue layer 40, the glue layer 40 is arranged on the exhaust groove 311 and forms an exhaust passage 312, and the exhaust passage 312 is communicated to the outside of the buffer structure 30. Each buffer body part 302 is connected to the corresponding battery monomer 20 through the glue layer 40.

[0157] The exhaust groove 311 comprises a first groove 311a and a second groove 311b, the first groove 311a extends along the second direction Y and penetrates to the outside of the first surface 31, and the second groove 311b extends along the third direction Z and penetrates to the outside of the first surface 31. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0158] In the embodiment, the number of the first groove 311a can be one, and the first groove 311a can be arranged close to the center of the first surface 31 along the third direction Z, for example, the first groove 311a is located at the central axis of the first surface 31 along the third direction Z. The number of the second groove 311b can be two, and the two second grooves 311b can be symmetrically arranged about the central axis of the first surface 31 along the second direction Y. In this way, one first groove 311a and two second grooves 311b distributed on the first surface 31 of each buffer body part 302 can form a mesh structure to guide the release of residual gas inside the buffer body part 302, thereby reducing the probability of forming bubbles or protrusions on the first surface 31, and improving the stability of the first surface 31 assembled to the battery monomer 20 through the glue layer 40.

[0159] Please refer to Figures 5 to 7 The buffer structure 30 comprises a base body 301 and a plurality of buffer body parts 302 arranged in sequence on the base body 301 along the second direction Y, and each buffer body part 302 has a first surface 31 on a side away from the base body 301. The first surface 31 of each buffer body part 302 is provided with an exhaust groove 311 and a glue layer 40, the glue layer 40 is arranged on the exhaust groove 311 and forms an exhaust passage 312, and the exhaust passage 312 is communicated to the outside of the buffer structure 30. The first surface 31 of each buffer body part 302 is provided with an exhaust groove 311 and a glue layer 40, the glue layer 40 is arranged on the exhaust groove 311 and forms an exhaust passage 312, and the exhaust passage 312 is communicated to the outside of the buffer structure 30.

[0160] The buffer structure 30 provided by the embodiment can guide the release of residual gas inside through the exhaust groove 311 arranged on the first surface 31 of each buffer body part 302, thereby effectively reducing the probability of forming a bulge on the first surface 31, and improving the assembly stability of the buffer structure 30.

[0161] Please refer to Figures 1 to 3 The application also provides a power utilization device comprising the battery device 100 or the buffer structure 30.

[0162] The power utilization device provided by the application, for example, the vehicle 1000, comprises the battery device 100 or the buffer structure 30, so that the stability and assembly efficiency of the power utilization device equipped with the buffer structure 30 are better.

[0163] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized by: The battery pack comprises: a box body comprising a bottom plate and side beams arranged at opposite sides of the bottom plate along a first direction; a plurality of battery cells arranged on the bottom plate along a second direction, and the plurality of battery cells are located between the side beams arranged at the opposite sides, and the first direction is perpendicular to the second direction; a buffer structure arranged between the plurality of battery cells and the corresponding side beams, the buffer structure has a first surface arranged along the first direction and towards the plurality of battery cells, and a glue layer is arranged on the first surface, and the first surface is connected to the plurality of battery cells through the glue layer; wherein the first surface is provided with an exhaust groove extending along a direction parallel to the first surface and penetrating to the outside of the first surface; the glue layer covers the exhaust groove and forms an exhaust passage, and the exhaust passage is communicated to the outside of the buffer structure. The exhaust groove comprises a first groove, the first groove extends along a direction parallel to the first surface and penetrates to the outside of the first surface; the glue layer covers the first groove and forms the exhaust passage.

2. The battery device of claim 1, wherein: The exhaust groove further comprises a second groove, the second groove extends along a direction parallel to the first surface and penetrates to the outside of the first surface, and the second groove and the first groove are arranged in intersection; the glue layer covers the second groove and forms the exhaust passage.

3. The battery device of claim 2, wherein: The first groove is arranged along the second direction, and the second groove is arranged along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

4. The battery device of claim 3, wherein: The number of the first grooves is multiple, the multiple first grooves are arranged in sequence and spaced along the third direction, and the multiple first grooves are symmetrically arranged about a central axis of the first surface; 5. The battery device of claim 4, wherein: and / or, the number of the second grooves is multiple, the multiple second grooves are arranged in sequence and spaced along the second direction, and the multiple second grooves are symmetrically arranged about the central axis of the first surface. In the third direction, the spacing between the first groove adjacent to the outer edge of the first surface and the corresponding outer edge of the first surface is m, and m≥10mm; 6. The battery device of claim 5, wherein: and / or, in the second direction, the spacing between the second groove adjacent to the outer edge of the first surface and the corresponding outer edge of the first surface is n, and n≥10mm. The width of the exhaust groove is k, and 1mm≤k≤3mm.

7. The battery device according to any one of claims 1 to 6, characterized by: The depth of the exhaust groove is h, and 1.5mm≤h≤5mm.

8. The battery device of claim 7, wherein: The glue layer is provided with a ventilation hole, and part of the first surface is communicated to the outside of the buffer structure through the ventilation hole.

9. The battery device according to any one of claims 1 to 6, characterized by: At least part of the ventilation hole is communicated with the exhaust passage.

10. The battery device of claim 9, wherein: The buffer structure comprises a base body and a plurality of buffer body portions arranged in sequence on the base body along the second direction, and the first surface of each buffer body portion is away from the base body, the first surface of each buffer body portion is provided with the exhaust groove and the glue layer, and each buffer body portion is connected to the corresponding battery cell through the glue layer.

11. The battery device according to any one of claims 1 to 6 and 8 and 10, characterized by: ​ 12. A cushioning structure characterized by: The cushion structure comprises a base part and a plurality of cushion body parts, the plurality of cushion body parts are sequentially and spacedly arranged on the same side of the base part, and each of the cushion body parts has a first surface on the side away from the base part; an exhaust groove is arranged on the first surface, the exhaust groove extends along a direction parallel to the first surface and penetrates to the outside of the first surface; a glue layer is arranged on the first surface, the glue layer covers the exhaust groove and forms an exhaust passage, and the exhaust passage is communicated to the outside of the cushion structure.

13. An electrical device, characterized by: The battery device comprises the cushion structure according to any one of claims 1 to 11, or the cushion structure according to claim 12.

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