Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment, and the battery device comprises a box body which is internally provided with a containing cavity; the plurality of single batteries are arranged in the accommodating cavity, and all the single batteries are arranged into a plurality of columns along the first direction and are arranged into a plurality of rows along the second direction; the pressing piece is adhered to the first surfaces of at least part of the battery monomers along a third direction through an adhesive, and the first direction, the second direction and the third direction are pairwise intersected; wherein at least one of the first surface and the pressing piece is provided with a rough part on the bonding surface, and the rough part is used for accommodating at least part of the bonding glue. According to the battery device, the abutting piece can abut against the battery single body, meanwhile, the rough part is arranged on the first surface of the battery single body and / or the abutting piece, so that the battery single body can be more stably bonded with the abutting piece, the bonding strength is improved, and the overall vibration resistance of the battery device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery device and an electrical equipment. Background Art

[0002] A battery device generally includes a box body and a plurality of battery cells disposed inside the box body. During transportation or use of the battery device, it often shakes or moves under the action of external forces. During this process, the battery cells inside the box body are prone to vibrate or shift under the impact of external forces, affecting the structural stability and service performance of the battery device. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a battery device and an electrical equipment for the problem that the battery cells inside the box body are prone to vibrate or shift under the impact of external forces, affecting the structural stability and service performance of the battery device.

[0004] In a first aspect, the present application provides a battery device, including a box body, a pressing member, and a plurality of battery cells. The inside of the box body has a receiving cavity; the plurality of battery cells are disposed in the receiving cavity, and all the battery cells are arranged in multiple columns along a first direction and in multiple rows along a second direction; the pressing member is adhesively bonded to the first surface of at least some of the battery cells along a third direction through an adhesive. The first direction, the second direction, and the third direction intersect pairwise; wherein, at least one of the first surface and the pressing member is provided with a rough portion on the bonding surface, and the rough portion is used for accommodating at least some of the adhesive.

[0005] By providing the pressing member, the battery cells inside the box body can be pressed along the third direction, so that the battery cells are more stably pressed against the cavity wall of the receiving cavity; meanwhile, by providing a rough portion on the first surface of the battery cell and / or the bonding surface of the pressing member, the battery cell can be more stably bonded to the pressing member through the rough portion, and the rough portion can accommodate at least some of the adhesive, improving the bonding strength between the pressing member and the battery cell, thereby improving the overall anti-vibration ability of the battery device.

[0006] In some embodiments, the rough portion includes a groove, and the groove is formed by the bonding surface being recessed in the third direction.

[0007] By providing the groove, more adhesive can be accommodated during the bonding process, and the bonding area can be increased, thereby improving the bonding strength.

[0008] In some embodiments, the surface roughness range of the rough portion is 5μm ≤ Ra ≤ 20μm. Thus, the bonding area of the rough portion can be increased, thereby improving the bonding strength between the rough portion and the pressing member.

[0009] In some embodiments, the first surface and / or other surfaces of the pressing member except the bonding surface are non-bonding surfaces; the surface roughness of the portion of the bonding surface provided with the rough portion is greater than that of the non-bonding surface. Thus, the rough portion can be more firmly bonded to the pressing member, improving the bonding strength between the pressing member and the battery cell.

[0010] In some embodiments, each battery cell includes a top cover, an electrode assembly, and a housing. The electrode assembly is accommodated in the housing, the top cover is sealingly disposed at the opening of the housing, the surface of the top cover facing away from the electrode assembly is configured as the first surface, and electrode terminals are protrudingly provided on the non-bonding surfaces of the first surfaces, and the electrode terminals are electrically connected to the electrode assembly.

[0011] In some embodiments, the box body includes a main body and an upper cover that jointly enclose an accommodation cavity, and the bottom surface of the housing facing away from the top cover is bonded to the bottom surface of the main body or the upper cover.

[0012] With the above structure, the battery cell is first bonded to the bottom surface or the top surface of the accommodation cavity. At the same time, the pressing member presses against the top cover to press the battery cell against the bottom surface or the top surface of the accommodation cavity. Thus, the battery cell can be more stably disposed inside the box body, reducing the probability of the battery cell shaking.

[0013] In some embodiments, the first surface is provided with a rough portion on the bonding surface, and the rough portion is disposed at opposite ends of the first surface along a first direction. The pressing member includes a plurality of members spaced apart along the first direction, and each pressing member extends along a second direction and presses against two adjacent columns of battery cells along the first direction.

[0014] With the above structure, each pressing member can more stably press against two adjacent columns of battery cells, improving the stability of each battery cell in the accommodation cavity.

[0015] In some embodiments, the pressing member includes a pressing strip and a fixing band. The pressing strip is disposed between the fixing band and the first surface along a third direction. Opposite ends of the fixing band along the second direction are respectively connected to the limiting beams of the box body, and some battery cells are in contact with the limiting beams.

[0016] By providing the pressing strip and the fixing band, the battery cell can be more stably disposed in the accommodation cavity, improving the overall stability of the battery device.

[0017] In some embodiments, the pressing strip includes a contact portion and a limiting portion. The contact portion is bonded to the first surface. The limiting portion is connected to opposite ends of the contact portion along the first direction and extends away from the first surface. The limiting portion and the contact portion jointly enclose a limiting groove, and a part of the fixing band is accommodated in the limiting groove.

[0018] In this way, the fixing strap can be received in the limiting groove, and the fixing strap is limited by the limiting portion, so that the structure between the fixing strap and the pressing strip is more stable.

[0019] In some embodiments, the box body includes a main body and an upper cover that jointly enclose a receiving cavity, and the pressing member further includes a buffer member, and the buffer member is disposed between the fixing strap and the upper cover along the third direction. Thus, the buffer member can play a supporting role between the fixing strap and the upper cover, effectively reducing the probability of abnormal noise generation between the upper cover and the fixing strap.

[0020] In a second aspect, the present application further provides an electrical device including the battery device as described above.

[0021] In the above battery device and electrical device, a pressing member is added to the structure of the battery device. The pressing member can press the battery cells inside the box body along the third direction, so that the battery cells are more stably disposed inside the box body. At the same time, a rough portion is provided on the first surface of the battery cell and / or the bonding surface of the pressing member, so that the battery cell can be more stably bonded to the pressing member through the rough portion, and the rough portion can accommodate at least part of the adhesive, improving the bonding strength between the pressing member and the battery cell, thereby improving the overall vibration resistance of the battery device. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a vehicle according to one or more embodiments.

[0023] Figure 2 It is a schematic structural diagram of a battery device according to one or more embodiments.

[0024] Figure 3 It is a schematic structural diagram of a battery cell in a battery device according to one or more embodiments.

[0025] Figure 4 It is Figure 2 a partial enlarged view of A in

[0026] Figure 5 It is a side view of a pressing strip in a battery device according to one or more embodiments.

[0027] Description of the reference numerals: 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, box body; 20, pressing member; 30, battery cell; 11, receiving cavity; 12, main body; 13, upper cover; 21, pressing strip; 22, fixing strap; 23, abutting portion; 24, limiting portion; 25, limiting groove; 26, buffer member; 31, first surface; 32, non-bonding surface; 33, rough portion; 34, groove; 35, top cover; 36, housing; 37, electrode terminal; a, first direction; b, second direction; c, third direction. Detailed Description of the Embodiments

[0028] To make the above objects, features, and advantages of the present application more obvious and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0030] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In the present application, unless otherwise clearly defined and limited, if terms such as "install", "connect", "couple", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0032] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or similar descriptions, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0034] At present, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars and other fields. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0035] In the structure of a battery device, it usually includes a box body and battery cells. The inside of the box body is hollow to form a receiving cavity, and the battery cells are disposed in the receiving cavity, and the box body plays a good protective role for the battery cells.

[0036] However, the usage scenarios of battery devices are very complex. During the transportation and use of battery devices, they usually shake or move under external forces. At this time, the battery cells are also prone to vibrate or shift under external force impacts inside the box body. In this way, the structure of the battery cells is easily damaged, and even the performance of the battery cells will be affected.

[0037] Based on the above considerations, to solve the problem that the battery cells inside the box body are prone to vibration or displacement under external force impact, affecting the structural stability and service performance of the battery device, in one or more embodiments of the present application, a battery device is provided. The battery cells inside the box body are pressed by a pressing member along the third direction, so that the battery cells are more stably arranged inside the box body. At the same time, a rough part is provided on the first surface of the battery cell and / or the bonding surface of the pressing member. The rough part is used to accommodate at least part of the bonding glue, so that the battery cell can be more stably bonded to the pressing member through the rough part, improving the bonding strength between the pressing member and the battery cell, thereby improving the overall anti-vibration ability of the battery device.

[0038] It should be noted that the battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a busbar component.

[0039] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells. As an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with cable ties.

[0040] In some embodiments, the battery device may be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0041] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body by fixing the battery module in the box body.

[0042] As an example, the battery cell assembly may also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0043] The battery device described in the embodiments of the present application is applicable to electrical equipment using the battery device.

[0044] The electrical equipment may be a vehicle, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle or an extended-range electric vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, for example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator and a planer, etc.

[0045] For the convenience of description, the following embodiments take a vehicle, which is an electrical device according to an embodiment of the present application, as an example for description.

[0046] As Figure 1 shown, a battery device 100 is provided inside the vehicle 1000. The battery device 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000. For example, the battery device 100 can serve as the operating power source of the vehicle 1000.

[0047] The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0048] 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 fuel or natural gas to provide driving power for the vehicle 1000.

[0049] Referring to Figure 2 and Figure 3 , an embodiment of the present application provides a battery device 100, including a box body 10, a pressing member 20, and a plurality of battery cells 30. The inside of the box body 10 has a receiving cavity 11. The plurality of battery cells 30 are arranged in a matrix in the receiving cavity 11 along a first direction a and a second direction b. All the battery cells 30 are arranged in multiple columns along the first direction a and in multiple rows along the second direction b. The pressing member 20 is adhesively bonded to the first surface 31 of at least part of the battery cells 30 along a third direction c. The first direction a, the second direction b, and the third direction c intersect pairwise. Wherein, at least one of the first surface 31 and the pressing member 20 is provided with a rough portion 33 on the bonding surface, and the rough portion 33 is used to accommodate at least part of the adhesive.

[0050] It should be noted that the box body 10 refers to the structure of the battery device 100 for accommodating the battery cells 30 and other functional components. A receiving cavity 11 is formed inside the box body 10. By disposing the battery cells 30 in the receiving cavity 11, the box body 10 can protect the battery cells 30, enabling the battery cells 30 to more stably achieve cyclic use.

[0051] The battery cell 30 refers to the component that actually undergoes a reaction in the battery device 100 and is also the smallest unit that makes up the battery device 100. The number of battery cells 30 can be multiple, and the number of battery cells 30 can be adjusted according to the actual requirements of the battery device 100.

[0052] Specifically, multiple battery cells 30 are arranged in multiple columns along the first direction a and in multiple rows along the second direction b within the accommodation cavity 11. That is, all the battery cells 30 are arranged in a matrix within the accommodation cavity 11. Among them, the first direction a can be set as the width direction of each battery cell 30, the second direction b can be set as the thickness direction of each battery cell 30, the first direction a and the second direction b are perpendicular to each other, and the second direction b is perpendicular to the large surface of each battery cell 30.

[0053] The pressing member 20 refers to a component that is connected to the box body 10 and can press each battery cell 30 within the accommodation cavity 11 along the third direction c. Among them, the third direction c can be set as the height direction of each battery cell 30, that is, the first direction a, the second direction b, and the third direction c are perpendicular to each other pairwise.

[0054] When each battery cell 30 is disposed within the accommodation cavity 11, the pressing member 20 presses it along the height direction of each battery cell 30, so that each battery cell 30 is stably pressed against the cavity wall of the accommodation cavity 11. In this way, each battery cell 30 is more stable within the accommodation cavity 11.

[0055] Therefore, by providing the pressing member 20, each battery cell 30 inside the box body 10 can be pressed along the third direction c, so that the battery cell 30 is more stably pressed against the cavity wall of the accommodation cavity 11.

[0056] Meanwhile, a rough portion 33 can be provided on the bonding surface of the first surface 31 of the battery cell 30, or a rough portion 33 can be provided on the bonding surface of the pressing member 20, or rough portions 33 can be provided on the bonding surfaces of the first surface 31 and the pressing member 20 respectively. In this way, the battery cell 30 can be more stably bonded to the pressing member 20 through the rough portion 33, improving the bonding strength between the pressing member 20 and the battery cell 30, thereby enhancing the overall vibration resistance of the battery device 100.

[0057] In some embodiments, the rough portion 33 is formed with a groove 34, and the groove is formed by the bonding surface being recessed in the third direction c.

[0058] Specifically, the groove 34 can be formed on each rough portion 33 by means of printing. Since the bottom surface of the groove 34 is at a lower height in the third direction c, the groove 34 can accommodate more structural adhesive and increase the bonding area between the rough portion 33 and the pressing member 20, thereby improving the bonding strength.

[0059] Furthermore, the groove 34 can be set as a plurality of grooves spaced apart from each other. The shape of the groove can be, but is not limited to, circular, rectangular, triangular, etc. The specific shape can be adjusted according to actual needs and will not be elaborated here.

[0060] By providing the groove 34, more adhesive can be accommodated during the bonding process, and the bonding area can be increased, thereby improving the bonding strength.

[0061] In some embodiments, the surface roughness of the rough portion 33 ranges from 5 μm ≤ Ra ≤ 20 μm.

[0062] It should be noted that Ra is the arithmetic mean deviation of the profile, which refers to the arithmetic mean of the absolute values of the profile offsets within the sampling length. It can be measured using a stylus method. The specific measurement process is as follows: A diamond stylus with a tip curvature radius of about 2 micrometers is slowly slid along the surface to be measured. The up and down displacement of the diamond stylus is converted into an electrical signal by an electrical length sensor, and after amplification, filtering, and calculation, the surface roughness value is indicated by a display instrument.

[0063] Specifically, the surfaces of the rough portions 33 can be surface-treated by laser to increase the surface roughness of the rough portions 33. Among them, by means of laser treatment, the surface roughness of the rough portions 33 is within the above range, which can increase the bonding area of the rough portions 33, thereby improving the bonding strength between the rough portions 33 and the pressing member 20.

[0064] In addition, after embossing or laser treatment of the rough portion 33, the rough portion 33 can be further treated by plasma to improve the activity of the metal on the surface of the rough portion 33, thereby further improving the bonding strength of the rough portion 33.

[0065] In some embodiments, the first surface 31 and / or other surfaces of the pressing member 20 except for the bonding surface are non-bonding surfaces 32; the surface roughness of the portion of the bonding surface provided with the rough portion 33 is greater than the surface roughness of the non-bonding surface 32.

[0066] In this way, the rough portion 33 can be more firmly bonded to the pressing member 20, improving the bonding strength between the pressing member 20 and the battery cell 30.

[0067] In some embodiments, each battery cell 30 includes a top cover 35, an electrode assembly (not shown in the figure), and a housing 36. The electrode assembly is accommodated in the housing 36. The top cover 35 is sealingly disposed at the opening of the housing 36. The surface of the top cover 35 facing away from the electrode assembly is configured as the first surface 31, and electrode terminals 37 are protrudingly provided on the non-bonding surface 32 of each first surface 31. The electrode terminals 37 are electrically connected to the electrode assembly.

[0068] Furthermore, the box body 10 includes a main body 12 and an upper cover 13 that jointly enclose to form a receiving cavity 11. The bottom surface of the housing 36 facing away from the top cover 35 is bonded to the bottom surface of the main body 12 or the upper cover 13.

[0069] It should be noted that the body 12 generally includes a bottom plate and side plates surrounding the bottom plate on all four sides. The bottom plate and the side plates together form a structure with an opening on one side. The upper cover 13 can be sealingly arranged at the opening of the body 12, so as to jointly enclose with the body 12 to form an accommodation cavity 11.

[0070] The battery cell 30 generally includes a top cover 35, a housing 36 and an electrode assembly. One end of the housing 36 is open, and the top cover 35 is sealingly arranged at the opening of the housing 36, and jointly encloses with the housing 36 to form a sealed cavity, so as to facilitate arranging the electrode assembly in the sealed cavity.

[0071] The electrode terminal 37 refers to a structure for outputting or inputting electric energy. Usually, a positive terminal and a negative terminal protrude from each battery cell 30, and the positive terminal and the negative terminal are arranged on the top cover 35 at intervals along the width direction of the battery cell 30.

[0072] When arranging the battery cell 30 in the accommodation cavity 11, the bottom surface of the housing 36 can be supported on the bottom plate of the body 12, and the top cover 35 is arranged facing the upper cover 13; or the bottom surface of the housing 36 can be supported on the upper cover 13, so that the top cover 35 faces the bottom surface of the body 12. That is, the battery cell 30 can be placed upright or inverted in the accommodation cavity 11. Wherein, the surface of the top cover 35 facing away from the electrode assembly is the first surface 31. The pressing member 20 presses against the first surface 31 of the top cover 35 to press the battery cell 30 against the inner wall of the accommodation cavity 11.

[0073] Furthermore, the bottom surface of the housing 36 can be bonded to the bottom surface of the body 12 by glue, structural adhesive or double-sided adhesive, etc. In this way, the battery cell 30 can be arranged more stably inside the box body 10.

[0074] Through the above structure, the battery cell 30 is first bonded to the bottom surface of the accommodation cavity 11. At the same time, the pressing member 20 presses down on the top cover 35 to press the battery cell 30 against the bottom surface of the accommodation cavity 11. In this way, the battery cell 30 can be arranged more stably inside the box body 10, reducing the probability of the battery cell 30 shaking.

[0075] In some embodiments, the first surface 31 is provided with rough portions 33 on the bonding surface, and the rough portions 33 are arranged at opposite ends of the first surface 31 along the first direction a. The pressing member 20 includes a plurality of members arranged at intervals along the first direction a. Each pressing member 20 extends along the second direction b and presses against two adjacent rows of battery cells 30 along the first direction a.

[0076] Specifically, two rough portions 33 are provided on each top cover 35, and the two rough portions 33 are arranged on opposite sides of the non-bonding surface 32 along the width direction of the battery cell 30. That is, the two rough portions 33 are arranged at the shoulders of the battery cell 30.

[0077] A plurality of pressing members 20 may be provided and arranged at intervals in the width direction of the battery cell 30, wherein each pressing member 20 extends in the thickness direction of the battery cell 30. In this way, each pressing member 20 can be in contact with two adjacent columns of battery cells 30 respectively in the width direction of the battery cell 30. That is, each pressing member 20 presses against the rough portions 33 on the shoulders of two adjacent columns of battery cells 30.

[0078] With the above structure, each pressing member 20 can press more stably against two adjacent columns of battery cells 30, improving the stability of each battery cell 30 in the accommodation cavity 11.

[0079] As Figure 4 and Figure 5 shown, in some embodiments, the pressing member 20 includes a pressing strip 21 and a fixing band 22. The pressing strip 21 is arranged between the fixing band 22 and the first surface 31 along the third direction c. The opposite ends of the fixing band 22 along the second direction b are respectively connected to the limiting beams of the box body 10, and part of the battery cells 30 are in contact with the limiting beams.

[0080] Specifically, the box body 10 usually further includes limiting beams arranged in the accommodation cavity 11. At least two limiting beams may be provided and arranged at intervals along the second direction b, and the battery cells 30 are arranged between every two adjacent limiting beams. In this way, the limiting beams can limit and support the battery cells 30. Optionally, the limiting beams are welded and fixed in the box body 10.

[0081] The fixing band 22 can be detachably connected to the limiting beam by bolts. In this way, the fixing band 22 further limits every two adjacent limiting beams and the battery cells 30 therebetween. Optionally, the fixing band 22 can be a steel band.

[0082] The pressing strip 21 is arranged between the fixing band 22 and the top cover 35 of the battery cell 30 along the third direction c. When the fixing band 22 is connected to the limiting beam, the fixing band 22 can press the pressing strip 21 down onto the top cover 35 of the battery cell 30 to provide pressure.

[0083] By providing the pressing strip 21 and the fixing band 22, the battery cells 30 can be arranged more stably in the accommodation cavity 11, improving the overall stability of the battery device 100.

[0084] In some embodiments, the pressing strip 21 includes a contact portion 23 and a limiting portion 24. The contact portion 23 is bonded to the first surface 31. The limiting portions 24 are connected to opposite ends of the contact portion 23 along the first direction a and extend in a direction away from the first surface 31. The limiting portions 24 and the contact portion 23 together enclose a limiting groove 25, and part of the fixing band 22 is received in the limiting groove 25.

[0085] Specifically, the limiting portion 24 is connected to opposite ends of the abutting portion 23 along the first direction a, and together with the abutting portion 23 forms a U-shaped structure. That is, the limiting portion 24 and the abutting portion 23 together enclose a limiting groove 25. In this way, the fixing belt 22 can be accommodated in the limiting groove 25, and the fixing belt 22 is limited by the limiting portion 24, making the structure between the fixing belt 22 and the pressing strip 21 more stable.

[0086] In some embodiments, the pressing member 20 further includes a buffer member 26, and the buffer member 26 is disposed between the fixing belt 22 and the upper cover 13 along the third direction c.

[0087] Specifically, the buffer member 26 can be, but is not limited to, foam, silica gel, rubber, etc. The buffer member 26 can play a supporting role between the fixing belt 22 and the upper cover 13, effectively reducing the probability of abnormal noise generation between the upper cover 13 and the fixing belt 22.

[0088] Based on the same concept as the above battery device 100, the present application also provides an electrical device including the battery device 100 as described above.

[0089] According to one or more embodiments, when the present application is specifically used, first, the battery monomers 30 are arranged in the accommodating cavity 11. Among them, all the battery monomers 30 are arranged in multiple columns along their own width direction and in multiple rows along their own thickness direction.

[0090] The bottom surfaces of all the battery monomers 30 are glued to the bottom wall of the accommodating cavity 11 to fix the battery monomers 30.

[0091] Furthermore, the fixing belt 22 is disposed in the limiting groove 25 of the corresponding pressing strip 21. The fixing belt 22 and the pressing strip 21 can be adhesively fixed, and the buffer member 26 is fixed on the fixing belt 22 by bonding. The fixing belt 22 is connected to the limiting beam inside the box body 10 through bolts to limit each battery monomer 30. At the same time, the pressing strip 21 presses down on the top covers 35 of each battery monomer 30, and the pressing strip 21 is bonded to the rough portions 33 of each top cover 35, which can further improve the bonding strength between the pressing strip 21 and the battery monomer 30.

[0092] The upper cover 13 is hermetically covered on the main body 12 to complete the assembly of the battery device 100, and the buffer member 26 can play a buffering and supporting role between the upper cover 13 and the fixing belt 22.

[0093] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0094] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A battery device, characterized in that, Comprising: A box body with an accommodation cavity inside; A plurality of battery cells arranged in multiple columns along a first direction and in multiple rows along a second direction in the accommodation cavity; And A pressing member adhesively bonded to at least a part of a first surface of the battery cells along a third direction, wherein the first direction, the second direction and the third direction intersect pairwise; Wherein, at least one of the first surface and the pressing member is provided with a rough part on the bonding surface, and the rough part is used to accommodate at least a part of the adhesive.

2. The battery device according to claim 1, wherein The rough part includes a groove formed by the bonding surface being recessed in the third direction.

3. The battery device according to claim 1, characterized in that, The surface roughness of the rough part ranges from 5μm≤Ra≤20μm.

4. The battery device according to claim 1, characterized in that, The other surfaces of the first surface and / or the pressing member except the bonding surface are non-bonding surfaces; the surface roughness of the part of the bonding surface provided with the rough part is greater than that of the non-bonding surface.

5. The battery device according to claim 4, wherein Each battery cell includes a top cover, an electrode assembly and a housing. The electrode assembly is accommodated in the housing, the top cover is sealed at the opening of the housing, and a surface of the top cover facing away from the electrode assembly is configured as the first surface. An electrode terminal protrudes from the non-bonding surface of each first surface, and the electrode terminal is electrically connected to the electrode assembly.

6. The battery device according to claim 5, wherein, Wherein, The box body includes a main body and an upper cover that jointly enclose the accommodation cavity, and the bottom surface of the housing facing away from the top cover is adhesively bonded to the bottom surface of the main body or the upper cover.

7. The battery device according to any one of claims 1-6, characterized in that, The first surface is provided with the rough part on the bonding surface, and the rough part is arranged at opposite ends of the first surface along the first direction. The pressing member includes a plurality of spaced apart along the first direction. Each pressing member extends along the second direction and presses on two adjacent columns of the battery cells along the first direction.

8. The battery device according to any one of claims 1-6, characterized in that, The pressing member includes a pressing strip and a fixing band. The pressing strip is arranged between the fixing band and the first surface along the third direction. Opposite ends of the fixing band along the second direction are respectively connected to the limiting beams of the box body, and part of the battery cells are in contact with the limiting beams.

9. The battery device according to claim 8, characterized in that, The pressing strip includes a contact part and a limiting part. The contact part is adhesively bonded to the first surface. The limiting part is connected to opposite ends of the contact part along the first direction and extends away from the first surface. The limiting part and the contact part jointly enclose a limiting groove, and part of the fixing band is accommodated in the limiting groove.

10. The battery device according to claim 8, characterized in that, The box body includes a main body and an upper cover that jointly enclose the accommodation cavity. The pressing member further includes a buffer member arranged between the fixing band and the upper cover along the third direction.

11. An electrical device, characterized in that, Including the battery device according to any one of claims 1-10.

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