Battery box body, battery pack and power utilization device

Abstract

The utility model relates to a battery box body, a battery pack and an electric device, and the battery box body comprises a box frame which is provided with four side walls which are connected in sequence; the outer sides of at least three side walls are connected with the lifting lugs; each lifting lug comprises a connecting part and a sleeve, the connecting part is connected with the side wall, and the sleeve is connected with the connecting part; a mounting surface connected with an external structure is formed at the top of each sleeve, and a mounting hole is formed in each mounting surface; and in the height direction of the box frame, the heights of the mounting surfaces of the lifting lugs are different. As the heights of the mounting surfaces of the lifting lugs in the height direction of the box frame are different, the height positions of the mounting surfaces of the lifting lugs in the height direction of the box frame are different. Due to the arrangement, when the box body is connected with an external structure and a plane parallel to one of the mounting surfaces is impacted by force, the battery box body is not easy to shake because other mounting surfaces are not parallel to the plane where the force is located, and the stability of the battery box body is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery box, battery package and electric device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry, and electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] The power battery includes a box body and a battery monomer, and the battery monomer is arranged in the box body. The box body supports and protects the battery monomer. In order to realize the connection between the power battery and the vehicle body, the box body is provided with lifting lugs, and the power battery is connected with the vehicle body through the lifting lugs. The heights of the lifting lugs of the traditional box body are consistent, that is, the mounting surfaces of the lifting lugs are in the same plane. When the box body is connected with the vehicle body and is impacted by force in a plane parallel to the mounting surface, the box body is easy to shake due to the parallel arrangement of the mounting surfaces, resulting in instability of the box body. SUMMARY

[0004] Therefore, it is necessary to provide a battery box, a battery package and an electric device capable of improving the installation stability of the battery box in view of the problem of poor installation stability of the battery box caused by the setting mode of the lifting lugs in the traditional technology.

[0005] In one aspect, the application provides a battery box, comprising:

[0006] The box frame has four side walls connected in sequence;

[0007] A plurality of lifting lugs are connected to the outer side of at least three side walls;

[0008] Each lifting lug comprises a connecting portion and a sleeve, the connecting portion is connected to the side wall, and the sleeve is connected to the connecting portion; the top of each sleeve forms a mounting surface connected to an external structure, and the mounting surface is provided with a mounting hole;

[0009] Among them, in the height direction of the box frame, the heights of the mounting surfaces of each lifting lug are different.

[0010] In one embodiment, the connecting portions of part of the lifting lugs are horizontally arranged at the bottom of the side wall of the box frame, and the connecting portions of part of the lifting lugs are vertically arranged at the top of the side wall of the box frame.

[0011] In one embodiment, the mounting surface of part of the lifting lugs exceeds the top surface of the box frame, and the mounting surface of the remaining part of the lifting lugs is located between the top surface and the bottom surface of the box frame.

[0012] In one of the embodiments, the box frame has two first side walls extending in the length direction and two second side walls extending in the width direction.

[0013] The lifting lugs are arranged on both of the first side walls and one of the second side walls.

[0014] In one of the embodiments, the lifting lugs include first, second and third types of lifting lugs, the first type of lifting lug is arranged on the second side wall, the second type of lifting lug and the third type of lifting lug are arranged on one of the first side walls, and the third type of lifting lug is arranged on the other first side wall.

[0015] In the embodiment, the longitudinal dimension of the connecting portion of the first, second and third types of lifting lugs is different, and the transverse dimension of the connecting portion of the second type of lifting lug is different from that of the first and third types of lifting lugs.

[0016] In one of the embodiments, one of the first side walls is provided with one of the second type of lifting lug and one of the third type of lifting lug.

[0017] In the length direction, the length of the connecting portion of the second type of lifting lug is greater than 1 / 2 of the length of the first side wall, and the third type of lifting lug is arranged apart from the second type of lifting lug.

[0018] In one of the embodiments, one end surface of the connecting portion of the second type of lifting lug in the length direction is flush with an end surface of one of the second side walls, and the first type of lifting lug is arranged on the second side wall flush with the connecting portion of the second type of lifting lug.

[0019] In one of the embodiments, one of the first side walls is provided with one of the second type of lifting lug and one of the third type of lifting lug, the other first side wall is provided with two of the third type of lifting lug, and one of the second side walls is provided with one of the first type of lifting lug.

[0020] The second type of lifting lug is opposite to one of the third type of lifting lug arranged on the other first side wall in the width direction, and is staggered with the other third type of lifting lug in the width direction, and one of the third type of lifting lug arranged on one of the first side walls is staggered with the two third type of lifting lugs arranged on the other second side wall in the width direction.

[0021] In another aspect, the application further provides a battery pack comprising a battery monomer and the battery box as described above, wherein the battery monomer is arranged in the battery box.

[0022] In yet another aspect, the application further provides a power consumption device comprising the battery pack as described above.

[0023] Compared with the prior art, this application has the following beneficial effects:

[0024] Because the mounting surfaces of the lifting lugs are at different heights along the height of the frame, i.e., their positions are not uniform, this design ensures that when the battery box is connected to an external structure, it is less prone to wobbling when subjected to impact on a plane parallel to one of the mounting surfaces. This is because the other mounting surfaces are not parallel to the plane of the force, thus increasing the battery box's stability. Attached Figure Description

[0025] Figure 1 This is a structural diagram of a battery housing provided in one embodiment of this application;

[0026] Figure 2 for Figure 1 Another structural view of the battery housing shown;

[0027] Figure 3 for Figure 1 The front view of the battery compartment shown;

[0028] Figure 4 for Figure 1 Another structural view of the battery housing shown;

[0029] Figure 5 for Figure 1 A structural diagram of the battery housing from another perspective;

[0030] Figure 6 for Figure 1 The image shows a top view of the battery compartment.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100. Battery housing; 10. Housing frame; 11. First side wall; 12. Second side wall; 13. Top surface; 14. Bottom surface; 20. Lifting lug; 21. Connecting part; 22. Sleeve; 221. Mounting surface; 222. Mounting hole; 20a. Type I lifting lug; 20b. Type II lifting lug; 20c. Type III lifting lug. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0034] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0035] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0036] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0037] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] In this embodiment of the application, the battery box 100 can be a structural component for accommodating battery cells or battery modules. The battery box includes a box frame 10, which has four side walls connected in sequence. The box frame is a hollow cuboid structure, and its size and shape can be set according to the battery cells or battery modules accommodated by the battery box.

[0040] See Figures 1-3 One embodiment of this application provides a battery box 100. Specifically, the box frame 10 is a hollow cuboid structure, that is, the cross-sectional shape of the box frame 10 is rectangular, and the four side walls of the box frame 10 respectively form the four sides of the cuboid. In other specific embodiments, the box frame 10 is a cube with a square cross-sectional shape, and the four side walls of the box frame 10 respectively form the four sides of the square.

[0041] The battery housing 100 also includes multiple lifting lugs 20, with at least three side walls having lifting lugs 20 attached to their outer sides. It should be noted that the battery housing 100 is used to mount individual battery cells; the inner side of the side wall is the side facing the battery cell, and the outer side is the side facing away from the battery cell. In some embodiments, three side walls have lifting lugs 20 attached to their outer sides. In other embodiments, four side walls have lifting lugs 20 attached to their outer sides for hoisting purposes.

[0042] Furthermore, each lifting lug 20 includes a connecting portion 21 and a sleeve 22. The connecting portion 21 is connected to the side wall, and the sleeve 22 is connected to the connecting portion 21. The top of each sleeve 22 forms a mounting surface 221 that connects to the external structure; that is, in the height direction of the housing frame 10, the top surface of the sleeve 22 is the aforementioned mounting surface 221. When the lifting lug 20 is connected to the external structure, the lifting lug 20 contacts the external structure through the mounting surface 221. The mounting surface 221 is provided with mounting holes 222, and the lifting lug 20 is connected to the external structure through the mounting holes 222 on the mounting surface 221 of the sleeve 22. Specifically, when the battery housing 100 is used in a vehicle, the lifting lug 20 is connected to the vehicle body through the mounting holes 222 on the mounting surface 221 of the sleeve 22.

[0043] Continue reading Figure 3In the height direction of the box frame 10, the heights of the mounting surfaces 221 of the respective lifting lugs 20 are different. It should be noted that the box frame 10 has openings for mounting the battery monomers, the battery monomers are arranged in the box frame 10 through the openings, the height direction of the box frame 10 is the direction perpendicular to the plane where the openings are located, and is also the direction of the Z axis in the coordinate system shown in FIG. 1. Figure 1 When the battery box body 100 is placed on a horizontal plane, the height direction of the box frame 10 is parallel to the vertical direction. In the height direction of the box frame 10, the heights of the mounting surfaces 221 of the respective lifting lugs 20 are different, which means that in the height direction of the box frame 10, the height positions of the mounting surfaces 221 of the respective lifting lugs 20 are different.

[0044] In this way, when the battery box body 100 is connected to an external structure, when a force is impacted in a plane parallel to one of the mounting surfaces 221, the battery box body 100 is not easy to shake due to the fact that the other mounting surfaces 221 are not parallel to the plane where the force is located, thereby increasing the stability of the battery box body 100 and improving the adaptability and adjustability of the lifting lug 20 to meet the lifting requirements in different working conditions.

[0045] It should be noted that when the mounting surfaces 221 of the respective lifting lugs 20 in the prior art are arranged in the same plane, the flatness requirement of the box frame 10 is high. Since the side walls of the box frame 10 are generally connected by welding, with the existing welding technology, it is difficult to meet the flatness requirement of the box frame 10. In the present application, in the height direction of the box frame 10, the heights of the mounting surfaces 221 of the respective lifting lugs 20 are different, and the flatness requirement of the box frame 10 itself is not high. The flatness of the box frame 10 formed by welding can meet the requirement, thereby reducing the process difficulty.

[0046] In some embodiments, the connecting part 21 of the lifting lug 20 is formed by aluminum profile extrusion, and the connecting part 21 is connected to the side wall by welding. The extrusion forming method can meet the diversified production requirements, has high production efficiency, is suitable for mass production, can ensure the strength and precision, and can produce connecting parts with different shapes and sizes. In the height direction of the box frame 10, the sleeve 22 is arranged above the connecting part 21.

[0047] Further, the mounting hole 222 is a threaded hole, and the sleeve 22 and the external structure are fixedly connected by a fixing screw arranged in the mounting hole 222.

[0048] In some embodiments, referring to Figure 4 and Figure 5The connecting portion 21 of the partial lifting lug 20 is horizontally arranged at the bottom of the side wall of the box frame 10, and the connecting portion 21 of the partial lifting lug 20 is vertically arranged at the top of the side wall of the box frame 10. That is, the extension direction of the connecting portion 21 of the partial lifting lug 20 is parallel to the length direction or the width direction of the box frame 10, so as to be connected to the bottom of the side wall of the box frame 10 in a horizontal manner, and the extension direction of the connecting portion 21 of the partial lifting lug 20 is parallel to the height direction of the box frame 10, so as to be connected to the top of the side wall of the box frame 10 in a vertical manner. In this way, the bottom and the top of the box frame 10 are both connected with the lifting lug 20, so that the position of the top and the bottom of the box frame 10 is connected to the external structure through the lifting lug 20, and the lifting lug 20 is dispersedly arranged in the height direction of the box frame 10, thereby further improving the connection stability of the battery box body 100.

[0049] In other embodiments, the connecting portion 21 of all the lifting lugs 20 can be connected to the bottom of the side wall of the box frame 10, or the connecting portion 21 of all the lifting lugs 20 can be connected to the top of the side wall of the box frame 10, which is not limited herein.

[0050] In some embodiments, continuing to refer to Figure 3 In the height direction of the box frame 10, the mounting surface 221 of the partial lifting lug 20 exceeds the top surface 13 of the box frame 10, and the mounting surface 221 of the remaining partial lifting lug 20 is located between the top surface 13 and the bottom surface 14 of the box frame 10. Alternatively, the box frame 10 further comprises a bottom plate connected to the four side walls, and the outer side surface of the bottom plate forms the bottom surface 14 of the box frame 10, and the top surface 13 of the box frame 10 is the top surface 13 for mounting the cover plate. Through this arrangement, part of the mounting surface 221 exceeds the box frame 10, and part of the mounting surface 221 is located within the range of the box frame 10, thereby increasing the stability of the connection between the battery box body 100 and the external structure.

[0051] It can be understood that in other embodiments, the mounting surface 221 of all the lifting lugs 20 can exceed the top surface 13 of the box frame 10, or the mounting surface 221 of all the lifting lugs 20 can be located between the top surface 13 and the bottom surface 14 of the box frame 10.

[0052] In some embodiments, continuing to refer to Figure 1 and Figure 2 The box frame 10 is a cuboid structure with an opening in the height direction, and the box frame 10 has two first side walls 11 extending in the length direction and two second side walls 12 extending in the width direction. The length direction, the width direction and the height direction are perpendicular to each other, the length direction is the X direction in Figure 1 the middle of the box frame 10, and the width direction is the Y direction in Figure 1The two first side walls 11 are each provided with an ear 20, and one of the second side walls 12 is provided with an ear 20. Since the length of the box frame 10 is greater than its width, by providing the two first side walls 11 extending along the length direction with an ear 20, and one of the second side walls 12 with an ear 20, compared with providing the two second side walls 12 extending along the width direction with an ear 20, and one of the first side walls 11 with an ear 20, the stability of the connection between the battery box 100 and the external structure can be further improved.

[0053] It can be understood that in other embodiments, when the number of ears 20 is not limited, the two first side walls 11 and the second side walls 12 can each be provided with an ear 20 to ensure equal force and maintain balance.

[0054] Further, the ear 20 includes a first type of ear 20a, a second type of ear 20b, and a third type of ear 20c. The first type of ear 20a is installed on the second side wall 12, one of the first side walls 11 is provided with the second type of ear 20b and the third type of ear 20c, and the other first side wall 11 is provided with the third type of ear 20c. The longitudinal dimension of the connecting portion 21 of the first type of ear 20a, the second type of ear 20b, and the third type of ear 20c is different, and the transverse dimension of the connecting portion 21 of the second type of ear 20b is different from that of the first type of ear 20a and the third type of ear 20c.

[0055] It should be noted that the longitudinal dimension of the connecting portion 21 of the ear 20 is the dimension of the connecting portion 21 itself in the vertical direction (the height direction of the box frame 10), and the transverse dimension of the connecting portion 21 of the ear 20 is the dimension of the connecting portion 21 itself in the horizontal direction (including the length direction and the width direction of the box frame 10).

[0056] By setting the longitudinal dimension of the connecting portion 21 of the first type of ear 20a, the second type of ear 20b, and the third type of ear 20c to be different, and the transverse dimension of the connecting portion 21 of the second type of ear 20b to be different from that of the first type of ear 20a and the third type of ear 20c, the shapes and sizes of the selected ears 20 are different, avoiding the problem of insufficient installation strength caused by selecting the same shape and size of the ear 20.

[0057] Optionally, the longitudinal dimension of the connecting portion 21 of the second type of lug 20b, the first type of lug 20a and the third type of lug 20c increases in turn, the lateral dimension of the connecting portion 21 of the first type of lug 20a and the third type of lug 20c is the same, and the lateral dimension of the connecting portion 21 of the second type of lug 20b is greater than the lateral dimension of the connecting portion 21 of the first type of lug 20a and the third type of lug 20c. In some embodiments, the lateral dimension of the connecting portion 21 of the first type of lug 20a and the third type of lug 20c is 90mm. It can be understood that in other embodiments, the lateral dimension of the connecting portion 21 of the first type of lug 20a, the second type of lug 20b and the third type of lug 20c is not limited.

[0058] In some embodiments, one first side wall 11 is provided with one second type of lug 20b and one third type of lug 20c. Referring to Figure 6 In the length direction of the box frame 10, the length of the connecting portion 21 of the second type of lug 20b is greater than 1 / 2 of the length of the first side wall 11, and the third type of lug 20c is spaced apart from the second type of lug 20b. By setting the length of the connecting portion 21 of the second type of lug 20b to be greater than 1 / 2 of the length of the first side wall 11, and spacing the third type of lug 20c from the second type of lug 20b, the first side wall 11 has a connecting portion 21 in most of the length direction, ensuring the stability and load-bearing capacity of the connection between the battery box 100 and the external structure, and avoiding tilting or shaking.

[0059] Of course, in other embodiments, the number of second type of lugs 20b and third type of lugs 20c distributed on the first side wall 11 is not limited. At the same time, the length of the first side wall 11 occupied by the connecting portion 21 of the second type of lug 20b and the third type of lug 20c is also not limited.

[0060] Further, referring to Figure 6 , one end surface of the connecting portion 21 of the second type of lug 20b is flush with an end surface of a second side wall 12, and the second side wall 12 flush with the connecting portion 21 of the second type of lug 20b is provided with a first type of lug 20a. Of course, in other embodiments, a first type of lug 20a can be provided on both second side walls 12, which is also not limited

[0061] In some embodiments, one of the first side walls 11 is provided with a second type of lifting lug 20b and a third type of lifting lug 20c, the other first side wall 11 is provided with two third type of lifting lugs 20c, and one of the second side walls 12 is provided with a first type of lifting lug 20a. At this time, the battery box 100 includes five lifting lugs 20. The second type of lifting lug 20b is opposite to one of the third type of lifting lugs 20c on the other first side wall 11 in the width direction, and is staggered with the other third type of lifting lug 20c on the other first side wall 11 in the width direction. One of the third type of lifting lugs 20c on one of the first side walls 11 is staggered with both of the third type of lifting lugs 20c on the other second side wall 12 in the width direction. Through this scattered distribution, the lifting lugs 20 are scatteredly connected with the side walls of the box, improving the stability of the connection between the battery box 100 and the external structure. At the same time, the lifting lugs 20 are arranged on the box frame 10 in a non-uniform manner, which can reduce the installation space occupied by the lifting lugs 20 compared with the uniform distribution manner, and it is not necessary to sacrifice the overall space for the fixation of the lifting lugs 20, and the adaptability and adjustability of the lifting lugs are improved by such arrangement.

[0062] Specifically, one end face of the connecting portion 21 of the second type of lifting lug 20b arranged on one of the first side walls 11 is flush with the end face of a second side wall 12 in the length direction, and the first type of lifting lug 20a on the second side wall 12 flush with the connecting portion 21 of the second type of lifting lug 20b is located at the end away from the second type of lifting lug 20b. In the length direction of the box frame 10, the length of the connecting portion 21 of the second type of lifting lug 20b is greater than 1 / 2 of the length of the first side wall 11, and the third type of lifting lug 20c on the same side wall as the second type of lifting lug 20b is located at the other end of the first side wall 11. In this way, the lifting lugs 20 are further scatteredly arranged on the box frame 10, the stability of the connection between the battery box 100 and the external structure is improved, and it is ensured that the lifting can be smoothly carried out.

[0063] Further, referring to Figure 3 When the battery box 100 includes the above-mentioned five lifting lugs 20, one of the second type of lifting lugs 20b on the first side wall 11 is defined as a first lifting lug, one of the first type of lifting lugs 20a on the second side wall 12 is defined as a second lifting lug, one of the third type of lifting lugs 20c on the other first side wall 11 and opposite to the second type of lifting lug 20b in the width direction is defined as a third lifting lug, the other third type of lifting lug 20c is defined as a fourth lifting lug, and the third type of lifting lug 20c on the same first side wall 11 as the second type of lifting lug 20b is defined as a fifth lifting lug. The heights at which the mounting faces 221 of the first lifting lug, the second lifting lug, the third lifting lug, the fifth lifting lug, and the fourth lifting lug are located gradually increase.

[0064] Of course, in some other embodiments, the number of the lifting lugs 20 included in the battery box 100 is not limited, and the height position of the mounting surface 221 of each lifting lug 20 is not specifically limited.

[0065] Another embodiment of the present application also provides a battery pack, which comprises a battery monomer and the above-mentioned battery box 100, and the battery monomer is installed in the above-mentioned battery box 100.

[0066] Still another embodiment of the present application also provides a power consumption device, which comprises the above-mentioned battery pack.

[0067] Optionally, the power consumption device is a vehicle, which 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.

[0068] It is worth noting that for the pure electric automobile, the above-mentioned battery can be used as a driving power source, thereby replacing fossil fuels to provide driving power.

[0069] In some other embodiments, the type of the power consumption device is not limited, such as the power consumption device can also be a ship, a spacecraft, an electric toy, an electric tool, an energy storage device, an amusement device, an elevator and a lifting device, 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 or 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 energy storage device can be an energy storage wall, a base station energy storage, a container energy storage, etc. The amusement device can be a carousel, a free fall, etc. The present application does not specially limit the above-mentioned power consumption device.

[0070] The technical features of the above-mentioned embodiments can be combined arbitrarily, and 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.

[0071] The above-mentioned embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application patent. It should be pointed out that for the ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A battery case characterized by comprising: The box frame (10) has two first side walls (11) extending in the length direction and two second side walls (12) extending in the width direction; A plurality of lifting lugs (20) are connected to the outer side of at least three of the side walls; Each of the lifting lugs (20) comprises a connecting portion (21) connected to the side wall and a sleeve (22) connected to the connecting portion (21); the top of each of the sleeves (22) forms a mounting surface (221) connected to an external structure, and the mounting surface (221) is provided with a mounting hole (222); The height of the mounting surface (221) of each of the lifting lugs (20) is different in the height direction of the box frame (10). The connecting portion (21) of part of the lifting lugs (20) is horizontally arranged at the bottom of the side wall of the box frame (10), and the connecting portion (21) of part of the lifting lugs (20) is vertically arranged at the top of the side wall of the box frame (10).

2. The battery pack of claim 1, wherein, The mounting surface (221) of part of the lifting lugs (20) exceeds the top surface (13) of the box frame (10), and the mounting surface (221) of the remaining part of the lifting lugs (20) is located between the top surface (13) and the bottom surface (14) of the box frame (10).

3. The battery pack of claim 1, wherein, The box frame (10) has two first side walls (11) extending in the length direction and two second side walls (12) extending in the width direction; 4. The battery pack of any one of claims 1-3, wherein, Two of the first side walls (11) are provided with the lifting lugs (20), and one of the second side walls (12) is provided with the lifting lugs (20). The lifting lugs (20) include first type lifting lugs (20a), second type lifting lugs (20b), and third type lifting lugs (20c); the first type lifting lugs (20a) are mounted on the second side walls (12), one of the first side walls (11) is provided with the second type lifting lugs (20b) and the third type lifting lugs (20c), and the other first side wall (11) is provided with the third type lifting lugs (20c); 5. The battery pack of claim 4, wherein, The longitudinal dimension of the connecting portion (21) of the first type lifting lugs (20a), the second type lifting lugs (20b), and the third type lifting lugs (20c) is different, and the transverse dimension of the connecting portion (21) of the second type lifting lugs (20b) is different from that of the first type lifting lugs (20a) and the third type lifting lugs (20c). One of the first side walls (11) is provided with one of the second type lifting lugs (20b) and one of the third type lifting lugs (20c); 6. The battery pack of claim 5, wherein, In the length direction, the length of the connecting portion (21) of the second type lifting lugs (20b) is greater than 1 / 2 of the length of the first side wall (11), and the third type lifting lugs (20c) are arranged in a spaced manner with the second type lifting lugs (20b). The end surface of the connecting portion (21) of the second type lifting lugs (20b) in the length direction is flush with the end surface of one of the second side walls (12), and the second side wall (12) flush with the connecting portion (21) of the second type lifting lugs (20b) is provided with the first type lifting lugs (20a).

7. The battery pack of claim 6, wherein, ​ 8. The battery pack of claim 5, wherein, One of the first side walls (11) is provided with one of the second type of lifting lugs (20b) and one of the third type of lifting lugs (20c); the other of the first side walls (11) is provided with two of the third type of lifting lugs (20c); one of the second side walls (12) is provided with one of the first type of lifting lugs (20a); The second type of lifting lug (20b) is opposite to one of the third type of lifting lugs (20c) on the other of the first side walls (11) in the width direction, and is staggered with the other of the third type of lifting lugs (20c) in the width direction; one of the third type of lifting lugs (20c) on one of the first side walls (11) is staggered with the two of the third type of lifting lugs (20c) on the other of the second side walls (12) in the width direction.

9. A battery pack, characterized by, A battery pack comprising a battery cell and a battery case as claimed in any one of claims 1-8, the battery cell being mounted in the battery case.

10. An electrical device, characterized by A battery pack as claimed in claim 9.

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