Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment. The battery device comprises: a plurality of battery cells arranged in a first direction; the two end plates are respectively arranged at two ends of the plurality of single batteries along the first direction; the two side plates are respectively arranged at two ends of the plurality of single batteries along a second direction, and the second direction is perpendicular to the first direction; wherein the side plate comprises a main body part and a first bending part which is bent relative to the main body part, one end of the first bending part is connected with the main body part, the other end of the first bending part is connected with the end plate, and at least one hollow structure is arranged on the first bending part in a penetrating manner. According to the battery device, the hollow structure on the first bending part can reduce the internal stress of the first bending part, and can release the stress generated when the first bending part is bent and deformed relative to the main body part, so that the probability that the first bending part of the side plate is broken relative to the main body part is reduced, and the overall use reliability and structural stability of the battery device are improved.

Description

TECHNICAL FIELD

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

[0002] In the related art, the battery side plate of the battery device generally adopts a structure of high-strength extruded profile bending. In order to meet the structural strength requirement of the battery side plate, the thickness of the original profile is relatively thick. When the relatively thick profile is extruded and formed, the heat treatment effect of the profile is difficult to achieve the expectation, which reduces the mechanical properties of the profile, so that the bending area of the profile is prone to cracking after the profile is bent, which seriously affects the structural quality of the battery side plate and reduces the use reliability and stability of the battery device. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to solve the problem that the bending area of the battery side plate of the battery device is prone to cracking, which reduces the use reliability and stability of the battery device. To this end, the present application provides a battery device.

[0004] In a first aspect, the present application provides a battery device, comprising:

[0005] a plurality of battery monomers, the plurality of battery monomers are arranged along a first direction;

[0006] two end plates, respectively arranged at both ends of the plurality of battery monomers along the first direction;

[0007] two side plates, respectively arranged at both ends of the plurality of battery monomers along a second direction, the second direction and the first direction are perpendicular to each other;

[0008] wherein the side plate comprises a main body part and a first bending part bent relative to the main body part, one end of the first bending part is connected with the main body part, the other end of the first bending part is connected with the end plate, and at least one hollow structure is provided on the first bending part.

[0009] According to the battery device of the first aspect of the present application, at least the following beneficial effects are achieved:

[0010] The battery device of the present application has at least one hollow structure provided on the first bending part of the side plate, which can reduce the stress inside the first bending part and release the stress generated when the first bending part is bent and deformed relative to the main body part. In this way, the probability of stress concentration and fracture of the first bending part relative to the main body part when the first bending part of the side plate is bent relative to the main body part is reduced, the forming quality of the side plate is improved, and the use reliability and structural stability of the entire battery device are also improved.

[0011] In some embodiments, the first bending portion has two, and the two first bending portions are respectively connected to opposite ends of the main body portion along the first direction, and the two first bending portions are connected to the two end plates one by one.

[0012] In this way, the production efficiency of the battery device as a whole is improved, and the probability of cracking at the four corners of the battery device is reduced, and the use reliability and structural stability of the battery device are improved.

[0013] In some embodiments, the hollow structure has at least two, and all the hollow structures are distributed along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other two by two.

[0014] In this way, all the hollow structures can correspondingly reduce the stress of the corresponding parts of the first bending portion in the height direction, and at the same time, the stress of each part of the first bending portion in the height direction when the first bending portion is bent and deformed relative to the main body portion is released, further reducing the probability of cracking and breaking at different parts of the first bending portion, and further improving the forming quality of the side plate.

[0015] In some embodiments, the hollow structure is configured as a long hole.

[0016] In this way, the stress at the corresponding parts of the first bending portion when the first bending portion is bent and deformed relative to the main body portion is released through the long hole, and the probability of cracking and breaking at different parts of the first bending portion is further reduced.

[0017] In some embodiments, the hollow structure is configured as a circular hole.

[0018] In this way, the stress generated by the first bending portion can be directly released by the circular hole on the first bending portion, thereby reducing the probability of cracking and breaking at different parts of the first bending portion.

[0019] In some embodiments, the hollow structure is configured as a square hole.

[0020] In this way, the stress generated by the first bending portion can be directly released by the square hole on the first bending portion, thereby reducing the probability of cracking and breaking at different parts of the first bending portion.

[0021] In some embodiments, the thickness d1 of the first bending portion and the bending radius R1 of the first bending portion satisfy: 0 < R1 < 2.3d1.

[0022] In this way, by controlling the bending radius R1 of the first bending portion to be greater than 0 and less than 2.3 times the thickness of the first bending portion, and by virtue of the stress releasing effect of the hollow structure on the first bending portion, the probability of cracks occurring in the first bending portion during bending relative to the main body portion 131 can be effectively reduced, so that the side plate 13 has good bending quality and structural strength.

[0023] In some embodiments, the first bending portion includes an arc segment and a straight segment, the arc segment being connected between the straight segment and the main body portion, the straight segment being connected to and in the same plane as the end plate, and the hollow structure being arranged on the arc segment.

[0024] In this way, the stress of the arc segment can be reduced by the hollow structure, and the stress generated when the arc segment is bent and deformed relative to the main body portion can be released, thereby reducing the probability of the first bending portion breaking relative to the main body portion and improving the forming quality of the side plate. At the same time, the overall side plate is connected to the end plate by the straight segment thereon, which can improve the connection efficiency of the side plate and the end plate.

[0025] In some embodiments, the side plate further includes a plurality of ear structures, all of the ear structures being arranged on the side of the main body portion away from the battery monomer in the first direction, and the ear structures being used for positioning and connecting with the electric device.

[0026] In this way, the overall battery device can be conveniently positioned and assembled on the corresponding electric device, improving the installation accuracy and stability of the overall battery device.

[0027] In some embodiments, the ear structure includes a transition portion and an ear portion connected to the transition portion, the transition portion being protruded relative to the side of the main body portion away from the battery monomer and being integrally formed with the main body portion, and the thickness d3 of the transition portion and the thickness d2 of the main body portion satisfying: d3>d2.

[0028] In this way, the structural strength of the transition portion is greater than that of the main body portion 131 of the side plate 13, so that the transition portion and the ear portion formed on the transition portion can bear a larger load, reducing the probability of structural damage such as breaking and folding of the ear structure during use of the electric device, and improving the structural stability and use reliability of the overall battery device.

[0029] In some embodiments, the bottom of the main body portion is formed with a second bending portion on the side facing the battery monomer, the second bending portion being bent relative to the main body portion and being an integrally formed structure with the main body portion.

[0030] In this way, the second bending part can receive structural adhesive overflowing or falling from between the battery monomer and the side plate, reduce the probability of the structural adhesive overflowing to contact the functional components in the battery device, and further improve the use reliability of the battery device as a whole.

[0031] In a second aspect, the application provides a power-using device, which comprises the battery device described above and is configured to provide electric energy.

[0032] According to the power-using device of the second aspect of the application, at least the following beneficial effects can be achieved:

[0033] The power-using device of the application has the battery device described above, and the battery device has high use reliability, which is beneficial to improve the use reliability and service life of the power-using device.

[0034] The above description is only a summary of the technical solutions of the application, and in order to enable the technical means of the application to be more clearly understood and implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the application to be more apparent and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the scope of the application. Moreover, the same reference numerals in the attached drawings indicate the same or similar elements. In the drawings:

[0036] Figure 1 It is a structural schematic diagram of the vehicle of the embodiment of the application.

[0037] Figure 2 It is another structural schematic diagram of the vehicle of the embodiment of the application.

[0038] Figure 3 It is an exploded view of the battery device of the embodiment of the application.

[0039] Figure 4 It is a structural schematic diagram of the battery device of the embodiment of the application.

[0040] Figure 5 It is a structural schematic diagram of the side plate before bending of the embodiment of the application.

[0041] Figure 6 It is a structural schematic diagram of the side plate of the embodiment of the application Figure 1 .

[0042] Figure 7 It is Figure 6 a local enlarged view of A in FIG. 8.

[0043] Figure 8 The forming flow chart of the side plate of the embodiment of the present application.

[0044] Figure 9 The structure diagram of the side plate of the embodiment of the present application Figure 2 .

[0045] Figure 10 The structure diagram of the side plate of the embodiment of the present application Figure 3 .

[0046] Figure 11 The top view structure diagram of the side plate of the embodiment of the present application.

[0047] Figure 12 The front view structure diagram of the side plate and the battery cell in the connected state of the embodiment of the present application.

[0048] Figure 13 The cross-sectional structure diagram of the embodiment of the present application at B-B. Figure 12

[0049] Legend: battery device 1; box body 10; upper cover 101; lower box body 102; cavity 103; cover plate 11; end plate 12; side plate 13; main body part 131; first bending part 132; hollow structure 1321; arc segment 1322; straight segment 1323; ear structure 133; transition part 1331; ear part 1332; second bending part 134; battery cell 20; vehicle 30; controller 40; motor 50; first direction X; second direction Y; third direction Z. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0051] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 a limitation on the present application.​

[0052] In addition, the terms "first", "second", and the like, if any appear in the description, are used for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0053] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. 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, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] In the present application, unless otherwise explicitly specified and limited, if the first feature is described as "on" or "under" the second feature and the like, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0055] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.

[0056] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery device technology is an important factor for their development.

[0057] The battery device is composed of one or more battery monomers. For each battery device, the plurality of battery monomers that constitute it can be connected in series or in parallel or in a mixed connection. Among them, the mixed connection means that there are both series and parallel connections among the plurality of battery monomers. The plurality of battery monomers can be directly connected in series or in parallel or in a mixed connection together, and the whole composed of the plurality of battery monomers is accommodated in the box of the battery device. Of course, the battery device can also be that a plurality of battery monomers are first connected in series or in parallel or in a mixed connection to form a battery monomer group, and a plurality of battery monomer groups are connected in series or in parallel or in a mixed connection to form a whole, and are accommodated in the box of the battery device. The battery device can also include other structures, for example, the battery device can also include an electrical connector for realizing the electrical connection between the plurality of battery monomers.

[0058] The battery monomer is the smallest unit that constitutes the battery, and in the structure of the battery monomer, it includes a shell, an electrolyte, and an electrode assembly. The electrode assembly is a component that undergoes an electrochemical reaction in the battery monomer, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. The shell can include one or more electrode assemblies, and the electrode assembly is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually arranged between the positive electrode sheet and the negative electrode sheet.

[0059] The shell is a structure with one end open and hollow inside. The electrode assembly is arranged inside the shell, and the end cover is arranged at the opening of the shell. The end cover is closed to form the internal environment of the battery monomer. Of course, the end cover and the shell can also be integrated. Specifically, the end cover and the shell can form a common connecting surface before other components enter the shell. When it is necessary to seal the inside of the shell, the end cover is closed to the shell. The shell can be of various shapes and sizes, such as a rectangular parallelepiped, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell can be determined according to the specific shape and size of the electrode assembly. The shell can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. The embodiments of the present application do not make special limitations.

[0060] In the related art, the battery side plate of the battery device generally adopts a structure of bending a high-strength extruded profile. In order to meet the structural strength requirement of the battery side plate, the thickness of the original profile is relatively thick. When the thick profile is extruded and formed, the heat treatment effect of the profile is difficult to achieve the expectation, which reduces the mechanical properties of the profile, so that after the profile is bent, the bending area of the profile is prone to cracking, which seriously affects the structural quality of the battery side plate and reduces the use reliability and stability of the battery device.

[0061] Based on the above, in order to solve the problem that the bending area of the battery side plate of the battery device is prone to cracking, thereby reducing the use reliability and stability of the battery device, one or more embodiments of the present application provide a battery device. At least one hollow structure is provided on the first bending part of the side plate of the battery device. The hollow structure on the first bending part can reduce the stress inside the first bending part and release the stress generated when the first bending part bends and deforms relative to the main body part. In this way, the probability of stress concentration in the first bending part of the side plate when it bends relative to the main body part is reduced, thereby improving the forming quality of the side plate and directly improving the use reliability and structural stability of the battery device as a whole.

[0062] The battery device of the embodiments of the present application can be used in an electric 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 electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, 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.

[0063] Referring to Figure 1 and Figure 2 , Figure 1 is a structural schematic view of a vehicle of some embodiments of the present application. The vehicle 30 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 30 is internally provided with a battery device 1, which can be arranged at the bottom, head or tail of the vehicle 30. The battery device 1 can be used for power supply of the vehicle 30, for example, the battery device 1 can be used as the operating power source of the vehicle 30. The vehicle 30 can also include a controller 40 and a motor 50, and the controller 40 is used to control the battery device 1 to supply power to the motor 50, for example, for the working power demand of the vehicle 30 during starting, navigation and driving.

[0064] Of course, in other embodiments, the battery device 1 can not only be used as the operating power source of the vehicle 30, but also be used as the driving power source of the vehicle 30, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 30.

[0065] Referring to Figure 3 and Figure 4 , the battery device 1 mentioned in the present application can include a battery module or a battery pack, etc.

[0066] Referring to Figure 3 , Figure 4 , Figure 5 , Figure 6 andFigure 7 The battery device 1 includes a plurality of battery cells 20, two end plates 12, and two side plates 13.

[0067] The plurality of battery cells 20 are arranged along a first direction X, the two end plates 12 are respectively arranged at two ends of the plurality of battery cells 20 along the first direction X, and the two side plates 13 are respectively arranged at two ends of the plurality of battery cells 20 along a second direction Y perpendicular to the first direction X.

[0068] The side plate 13 includes a main body portion 131 and a first bending portion 132 bent relative to the main body portion 131, one end of the first bending portion 132 is connected with the main body portion 131, the other end of the first bending portion 132 is connected with the end plate 12, and at least one hollow structure 1321 is provided through the first bending portion 132.

[0069] It should be noted that, in the present application, the two end plates 12 and the two side plates 13 are used to provide support and limiting for all the battery cells 20, and the two end plates 12 and the two side plates 13 are arranged to form a containing cavity to accommodate all the battery cells 20. Of course, in other embodiments, the battery device 1 also includes a bottom plate (not shown in the figure), and the containing cavity is formed by the bottom plate, the two end plates 12, and the two side plates 13.

[0070] It should be noted that, the upper side of the containing cavity can be open to facilitate the loading of the battery cells 20. Referring to Figure 4 The battery device 1 also includes a cover plate 11 arranged at the open side of the containing cavity to cover the containing cavity. The cover plate 11 can be connected with the open side of the containing cavity by rotating clamping, buckle clamping, welding, or the like.

[0071] In the present application, the battery cells 20 can be multiple, and all the battery cells 20 can be arranged in the containing cavity by longitudinal and transverse arrangement; all the battery cells 20 can also be arranged in the containing cavity by staggered arrangement. The battery cells 20 can be, but are not limited to, cylindrical battery cells, square battery cells, and the like.

[0072] It should be noted that, referring to Figure 3 The battery device of the embodiment of the present application can also include a box body 10, the box body includes an upper cover 101 and a lower box body 102, and the upper cover 101 and the lower box body 102 jointly define a cavity 103 for accommodating a plurality of battery cells 20 or a battery cell group. The box body 10 formed by the upper cover 101 and the lower box body 102 can be in various shapes, such as a cylinder, a cuboid, and the like.

[0073] When the plurality of battery monomers 20 are defined in the space surrounded by the two end plates 12 and the two side plates 13, at this time, the two end plates 12, the two side plates 13 and the plurality of battery monomers 20 constitute a battery module, and the plurality of battery modules are installed in the box body 10 to form a battery pack.

[0074] Specifically, in the battery device of the present application, all the battery monomers 20 are arranged along the first direction X, the first direction X is the length direction of the battery device, the second direction Y is the width direction of the battery device, and the third direction is the height direction of the battery device.

[0075] It should be noted that in the battery device 1 of the present application, the end plate 12 and the side plate 13 are made of aluminum alloy profile plate. The aluminum alloy has low density but high strength, close to or exceeding high-quality steel, good plasticity, can be processed into various profiles, has heat conductivity and corrosion resistance, and the good plasticity and cheap price of the aluminum alloy facilitate large-scale production and application of the end plate 12 and the side plate 13, and have good practicability.

[0076] The end plate 12 and the side plate 13 are extruded profiles. Extrusion molding is to apply pressure to metal blanks to produce directional plastic deformation, so as to obtain parts or semi-finished products with required cross-sectional shape, size and mechanical properties. Extrusion molding has high material utilization, and the organization and mechanical properties of the material are improved. The profile obtained by extrusion molding has good structural strength and mechanical properties. The profile can be cut according to the required shape of the end plate 12 and the side plate 13, and the production efficiency is improved.

[0077] It should be noted that when the end plate 12 is connected with the side plate 13, the first bending part 132 of the end plate 12 and the side plate 13 are butted and welded, and the welding mode can be but is not limited to conventional welding, laser fiber welding and the like, so that the end plate 12 and the side plate 13 are connected as an integral structure. The end plate 12 and the side plate 13 can be connected with the bottom plate by direct connection or indirect connection, which is not limited.

[0078] It can be understood that, referring to Figure 8 Before the profile is extruded, heat treated and bent to obtain the side plate 13 of the present application, the main body part 131 and the first bending part 132 of the side plate 13 are in the adjacent area of the original profile, and the first bending part 132 is provided with a hollow structure 1321 penetrating through. The hollow structure 1321 can be but is not limited to a groove or a hole.

[0079] After the profile is extruded and heat treated, the stress of the main body 131 and the first bending part 132 of the profile is easy to be unevenly distributed, and the stress of the profile is more concentrated in the first bending part 132. Therefore, at least one hollow structure 1321 is arranged on the first bending part 132, the hollow structure 1321 on the first bending part 132 can reduce the stress inside the first bending part 132 and release the stress generated when the first bending part 132 is bent and deformed relative to the main body 131. In this way, the probability of stress concentration when the first bending part 132 of the side plate 13 is bent relative to the main body 131 is reduced, and the probability of the first bending part 132 being broken relative to the main body 131 is reduced. The forming quality of the side plate 13 is improved, and the use reliability and structural stability of the battery device 1 as a whole are also improved.

[0080] In addition, by arranging the hollow structure 1321 on the first bending part 132 of the side plate 13, the weight of the side plate 13 can be reduced, and the weight of the battery device 1 as a whole can be reduced, so that the battery device 1 can better meet the lightweight demand.

[0081] It is not difficult to understand that the battery device of the embodiment of the application has at least one hollow structure 1321 arranged on the first bending part 132 of the side plate 13. The hollow structure 1321 reduces the stress inside the first bending part 132 and releases the stress generated when the first bending part 132 is bent and deformed relative to the main body 131. The probability of stress concentration when the first bending part 132 of the side plate 13 is bent relative to the main body 131 is reduced, and the probability of the first bending part 132 being broken relative to the main body 131 is reduced. The forming quality of the side plate 13 is improved, and the use reliability and structural stability of the battery device 1 as a whole are also improved.

[0082] In some embodiments of the application, referring to Figure 4 , Figure 5 and Figure 6 , two first bending parts 132 are respectively connected to opposite ends of the main body 131 along the first direction X, and the two first bending parts 132 are respectively connected to the two end plates 12.

[0083] Specifically, the main body 131 and the two first bending parts 132 on the side plate 13 are integrally formed, the two first bending parts 132 are bent relative to the main body 131 towards the end plate 12, and the two first bending parts 132 are integrally connected to the two end plates 12 respectively, and at least one hollow structure 1321 is arranged on each first bending part 132.

[0084] It can be understood that on the battery device 1, the two side plates 13 are connected with the adjacent end plates 12 through the first bending portions 132 thereon to form a square structure, and the connection between the side plates 13 and the end plates 12 is transitioned through the corresponding first bending portions 132, which improves the production efficiency of the battery device 1 as a whole, reduces the probability of cracking at the four corners of the battery device 1, improves the structural stability of the battery device 1, and further improves the use reliability and structural stability of the battery device 1 as a whole.

[0085] In some embodiments of the present application, referring to Figure 9 and Figure 10 , the hollow structures 1321 are at least two, and all the hollow structures 1321 are spaced apart along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0086] Specifically, the hollow structures 1321 can be two, and both of the two hollow structures 1321 are configured as strip-shaped holes, and the two strip-shaped holes are spaced apart along the height direction of the first bending portion 132. Of course, in other embodiments, the hollow structures 1321 can be three or more. The number of hollow structures 1321 can be designed according to the actual processing weight requirement of the first bending portion 132 or the side plate 13.

[0087] It should be noted that the height direction of the first bending portion 132 also corresponds to the height direction of the battery monomer 20 or the battery device 1, that is, the third direction Z. In the bending forming process of the side plate 13, that is, the bending process of the first bending portion 132 of the side plate 13 relative to the main body portion 131, the first bending portion 132 is deformed relative to the main body portion 131 as a whole, and the part of the first bending portion 132 closer to the main body portion 131 has a larger deformation degree, and each part in the height direction of the first bending portion 132 has a risk of cracking.

[0088] Therefore, by providing at least two hollow structures 1321 on the first bending portion 132, all the hollow structures 1321 can correspondingly reduce the stress of the corresponding part in the height direction of the first bending portion 132, and simultaneously release the stress of each part in the height direction of the first bending portion 132 when the first bending portion 132 is bent and deformed relative to the main body portion 131, further reducing the probability of cracking and breaking of different parts on the first bending portion 132, and further improving the forming quality of the side plate 13.

[0089] In addition, it should be noted that in the actual use process of the battery device 1, the battery monomer 20 in the battery device 1 will expand and deform towards the side plate 13, and the closer to the position of the top cover of the battery monomer 20, the more easily the battery monomer 20 expands and deforms.

[0090] Therefore, when the side plate 13 is actually manufactured and processed, the thickness of the middle upper part of the side plate 13 is designed to be relatively thick, so that the corresponding part of the side plate 13 can bear the structural strength of the expansion deformation of the battery monomer 20. Correspondingly, when the side plate 13 is formed, the thickness of the middle upper part of the first bending part 132 on the side plate 13 is also relatively thick, and when the first bending part 132 is bent relative to the main body part 131, the middle part of the first bending part 132 is also more prone to cracking.

[0091] Based on this, in some embodiments of the present application, the hollow structure 1321 is arranged through the part of the first bending part 132 close to the top of the battery monomer 20.

[0092] In this way, the probability of cracking and breaking of the part of the first bending part 132 close to the top of the battery monomer 20 on the first bending part 132 can be correspondingly reduced, the forming quality of the side plate 13 can be correspondingly improved, and the structural stability of the battery device 1 can be correspondingly improved.

[0093] In some embodiments of the present application, the hollow structure 1321 is configured as a long hole.

[0094] Specifically, referring to Figure 5 , Figure 6 and Figure 7 , when the hollow structure 1321 is configured as a long hole, the length direction of the long hole corresponds to the height direction of the first bending part 132, so that the long hole is distributed on the part of the first bending part 132 which is more prone to breaking, thereby releasing the stress at the corresponding part of the first bending part 132 when the first bending part 132 is bent and deformed relative to the main body part 131, and further reducing the probability of cracking and breaking of different parts on the first bending part 132.

[0095] In some embodiments of the present application, the hollow structure 1321 is configured as a circular hole.

[0096] Specifically, referring to Figure 9 , along the height direction of the first bending part 132, two circular holes are arranged on the first bending part 132 at intervals, and the size of the circular hole can be designed according to the size of the first bending part 132.

[0097] It can be understood that when the first bending part 132 is bent and deformed relative to the main body part 131, the stress generated by the first bending part 132 can be directly released by the circular hole on the first bending part 132, thereby reducing the probability of cracking and breaking of different parts on the first bending part 132.

[0098] In some embodiments of the present application, the hollow structure 1321 is configured as a square hole.

[0099] Specifically, referring to Figure 10The two square holes are arranged on the first bending part 132 in the height direction of the first bending part 132, and the size of the square holes can be designed according to the size of the first bending part 132.

[0100] It can be understood that when the first bending part 132 is bent relative to the main body part 131, the stress generated by the first bending part 132 can be directly released by the square holes on the first bending part 132, thereby reducing the probability of cracking and breaking of different parts of the first bending part 132.

[0101] In some embodiments of the present application, referring to Figure 11 The thickness d1 of the first bending part 132 and the bending radius R1 of the first bending part 132 satisfy: 0 < R1 < 2.3d1.

[0102] It should be noted that before the side plate 13 is bent, the first bending part 132 on the side plate 13 is in the same plane as the main body part 131. After the side plate 13 is bent, the first bending part 132 is bent at a certain angle relative to the main body part 131.

[0103] Referring to Figure 11 The bending radius R1 of the first bending part 132 refers to the inner fillet radius of the bending part of the first bending part 132. By controlling the bending radius R1 of the first bending part 132 to be greater than 0 and less than 2.3 times the thickness of the first bending part 132, and by the releasing effect of the hollow structure 1321 on the bending stress, the probability of cracking of the first bending part 132 during bending relative to the main body part 131 can be effectively reduced, and the side plate 13 has good bending quality and structural strength.

[0104] In some embodiments of the present application, referring to Figure 6 and Figure 7 The first bending part 132 includes an arc segment 1322 and a straight segment 1323, the arc segment 1322 is connected between the straight segment 1323 and the main body part 131, the straight segment 1323 is connected with the end plate 12 and is in the same plane as the end plate 12, and the hollow structure 1321 is arranged on the arc segment 1322.

[0105] It is easy to understand that the arc segment 1322 and the straight segment 1323 are an integral structure. When the first bending part 132 is bent relative to the main body part 131, the actual bending deformation part of the first bending part 132 is concentrated in the arc segment 1322, that is, the arc segment 1322 is more prone to cracking due to stress concentration.

[0106] Based on this, the hollow structure 1321 is arranged on the arc-shaped section 1322, and the hollow structure 1321 can be configured as a groove-shaped structure, a hole-shaped structure, etc. The stress of the arc-shaped section 1322 can be reduced by the hollow structure 1321, and the stress generated when the arc-shaped section 1322 is bent and deformed relative to the main body part 131 is released, so as to reduce the probability of the first bending part 132 being broken relative to the main body part 131, and improve the forming quality of the side plate 13.

[0107] In addition, by bending the first bending part 132 to form a flat section 1323 in the same plane as the end plate 12, the side plate 13 is connected to the end plate 12 through the flat section 1323 on the side plate 13, which can improve the connection efficiency of the side plate 13 and the end plate 12.

[0108] In some embodiments of the present application, referring to Figure 6 , Figure 9 and Figure 10 , the side plate 13 further comprises a plurality of ear structures 133, all of which are arranged on the side of the main body part 131 away from the battery monomer 20 along the first direction X, and the ear structure 133 is used for positioning and connecting with the electric equipment.

[0109] Specifically, before the side plate 13 is bent, the ear structure 133 can be directly machined on the main body part 131 of the side plate 13 by cutting machining, and then the side plate 13 is bent to form the first bending part 132 connected to the end of the main body part 131.

[0110] Of course, in other embodiments, the ear structure 133 can also be connected to the corresponding position of the main body part 131 of the side plate 13 by welding.

[0111] In some embodiments, the ear structure 133 can be a hanging plate with a positioning hole, and the hanging plate is perpendicular to the side plate 13; in other embodiments, the ear structure 133 can also be a hollow shell with a positioning hole, and the specific structure shape is not limited.

[0112] Referring to Figure 1 When the battery device 1 of the present application is configured in the electric equipment vehicle 30, the bolt passes through the positioning hole on the ear structure 133 and is connected to the connecting hole on the base of the vehicle 30, so as to position and assemble the battery device 1 on the vehicle 1 through the ear structure 133 on the side plate 13 of the battery device 1, and improve the stability of the installation of the battery device 1.

[0113] It is not difficult to understand that the battery device 1 of the present application can be conveniently positioned and assembled on the corresponding electric equipment through the ear structure 133 on the side plate 13, and the installation accuracy and stability of the whole battery device 1 are improved.

[0114] Further, referring toFigure 12 and Figure 13 The lug structure 133 includes a transition portion 1331 and a lug portion 1332 connected to the transition portion 1331, the transition portion 1331 protrudes from the side of the main body portion 131 away from the battery monomer 20 and is integrally formed with the main body portion 131, and the thickness d3 of the transition portion 1331 and the thickness d2 of the main body portion 131 satisfy: d3>d2.

[0115] It should be noted that in the present embodiment, the lug structure 133 is directly obtained by cutting processing on the main body portion 131 of the side plate 13.

[0116] The transition portion 1331 is in a block structure stacked with the main body portion 131, and the lug portion 1332 is a U-shaped ring formed on the transition portion 1331, and a positioning hole (not shown in the figure) for passing through a fastener such as a bolt is provided on the U-shaped ring.

[0117] When the battery device 1 is assembled on the vehicle 30, the bolt passes through the positioning hole on the lug portion 1332 and is threadedly connected with the connecting hole on the base of the vehicle 30, so as to realize the fixed installation of the battery device 1.

[0118] After the battery device 1 is installed on the vehicle 30, the lug structure 133 is the main load-bearing component of the entire battery device 1, and the structural strength design needs to meet the actual use requirements.

[0119] Therefore, by setting the thickness d3 of the transition portion 1331 on the lug structure 133 to be greater than the thickness d2 of the main body portion 131 of the side plate 13, the structural strength of the transition portion 1331 is greater than that of the main body portion 131 of the side plate 13, so that the transition portion 1331 and the lug portion 1332 formed on the transition portion 1331 can bear larger load, and the probability of structural damage such as fracture and breakage of the lug structure 133 in the use process of the electrical equipment is reduced, and the structural stability and use reliability of the entire battery device 1 are improved.

[0120] It should be noted that when the plurality of battery monomers 20 are accommodated in the accommodating cavity of the battery device 1, the plurality of battery monomers 20 are stacked and arranged, and the outermost battery monomer 20 is fixed on the side plate 13 by structural glue. In the actual assembly process of the battery monomer 20 in the accommodating cavity and the normal use process of the battery device 1, there is a situation that the structural glue between the battery monomer 20 and the side plate 13 overflows and falls off.

[0121] Therefore, in some embodiments of the present application, referring to Figure 6 , Figure 7 and Figure 13 , a second bending portion 134 is formed on the side of the bottom of the main body portion 131 facing the battery monomer 20, and the second bending portion 134 is bent relative to the main body portion 131 and is an integral molding structure with the main body portion 131.

[0122] Specifically, the second bending part 134 is in an arc shape, and the bending direction of the second bending part 134 is towards the top of the battery device 1.

[0123] It is not difficult to understand that by forming the second bending part 134 on the side of the bottom of the main body part 131 towards the battery monomer 20, the second bending part 134 can receive the structural glue overflowing or falling from between the battery monomer 10 and the side plate 13, reduce the probability of the structural glue overflowing to contact the functional components in the battery device 1, and further improve the use reliability of the battery device 1 as a whole.

[0124] In addition, the application also provides a power consumption equipment, which comprises the battery device of any one of the above-mentioned embodiments, and the battery device is used to provide electric energy.

[0125] Specifically, referring to Figure 1 and Figure 2 , the power consumption equipment can be a vehicle 30, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, for example, a game machine, an electric automobile toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer, etc. The application does not specially limit the above-mentioned power consumption equipment.

[0126] The power consumption equipment of the application has the battery device, which has the use reliability, and is beneficial to improve the use reliability and the service life of the power consumption equipment.

[0127] Referring to Figures 1 to 13 In some embodiments of the application, the application provides a battery device for a power consumption equipment. The power consumption equipment comprises the battery device.

[0128] The battery device comprises: a plurality of battery monomers 20 arranged along a first direction X; two end plates 12 respectively arranged at both ends of the plurality of battery monomers 20 along the first direction X; and two side plates 13 respectively arranged at both ends of the plurality of battery monomers 20 along a second direction Y.

[0129] The side plate 13 comprises a main body part 131 and a first bending part 132 bent relative to the main body part 131, one end of the first bending part 132 is connected with the main body part 131, the other end of the first bending part 132 is connected with the end plate 12, and at least one hollow structure 1321 is arranged through the first bending part 132.

[0130] The battery device of the embodiment of the present application has the at least one hollow structure 1321 arranged through the first bending part 132 of the side plate 13, the stress inside the first bending part 132 is reduced by the hollow structure 1321, the stress generated when the first bending part 132 is bent and deformed relative to the main body part 131 is released, the probability of the first bending part 132 being broken relative to the main body part 131 due to stress concentration when the first bending part 132 of the side plate 13 is bent relative to the main body part 131 is reduced, the forming quality of the side plate 13 is improved, and the overall use reliability and structural stability of the battery device 1 are directly improved.

[0131] The electric equipment of the embodiment of the present application is configured with the above-mentioned battery device, the battery device has use reliability, and is beneficial to improve the use reliability and service life of the electric equipment.

[0132] The technical features of the above-mentioned embodiments can be combined arbitrarily, in order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the present application.

[0133] The above-mentioned embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the patent application scope. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A battery device, characterized by, The battery device comprises: a plurality of battery cells arranged along a first direction; two end plates respectively arranged at two ends of the plurality of battery cells along the first direction; two side plates respectively arranged at two ends of the plurality of battery cells along a second direction, the second direction being perpendicular to the first direction; wherein the side plate comprises a main body portion and a first bent portion bent relative to the main body portion, one end of the first bent portion being connected to the main body portion, the other end of the first bent portion being connected to the end plate, and at least one hollow structure being provided on the first bent portion.

2. The battery device according to claim 1, characterized by The first bent portion has two first bent portions respectively connected to opposite ends of the main body portion along the first direction, and the two first bent portions are connected to the two end plates one by one.

3. The battery device of claim 1, wherein The hollow structure has at least two hollow structures, and all the hollow structures are distributed along a third direction, the first direction, the second direction and the third direction being perpendicular to each other.

4. The battery device of claim 1, wherein The hollow structure is configured as a long hole.

5. The battery device of claim 1, wherein The hollow structure is configured as a circular hole.

6. The battery device of claim 1, wherein The hollow structure is configured as a square hole.

7. The battery device of claim 1, wherein The thickness d1 of the first bent portion and the bending radius R1 of the first bent portion satisfy: 0 < R1 < 2.3d1.

8. The battery device according to claim 1 or 7, characterized by The first bent portion comprises an arc segment and a straight segment, the arc segment being connected between the straight segment and the main body portion, the straight segment being connected to the end plate and being in the same plane as the end plate, and the hollow structure being provided on the arc segment.

9. The battery device of claim 1, wherein, The side plate further comprises a plurality of ear structures, all the ear structures being provided on the side of the main body portion away from the battery cells along the first direction, and the ear structure being used for positioning connection with the electric equipment.

10. The battery device of claim 9, wherein, The ear structure comprises a transition portion and an ear portion connected to the transition portion, the transition portion being protruded away from the side of the main body portion away from the battery cells and being integrally formed with the main body portion, the thickness d3 of the transition portion and the thickness d2 of the main body portion satisfying: d3 > d2.

11. The battery device of claim 1, wherein The bottom of the main body portion is formed with a second bent portion on the side facing the battery cells, the second bent portion being bent relative to the main body portion and being an integrally formed structure with the main body portion.

12. An electrical device, characterized by The battery device comprises: a plurality of battery cells arranged along a first direction; two end plates respectively arranged at two ends of the plurality of battery cells along the first direction; two side plates respectively arranged at two ends of the plurality of battery cells along a second direction, the second direction being perpendicular to the first direction; wherein the side plate comprises a main body portion and a first bent portion bent relative to the main body portion, one end of the first bent portion being connected to the main body portion, the other end of the first bent portion being connected to the end plate, and at least one hollow structure being provided on the first bent portion.

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