Battery box cover, battery box, battery and electrical equipment

Abstract

The present application belongs to the field of battery design technology, and in particular, relates to a battery box cover, a battery box, a battery and an electrical device. The battery box cover includes a panel body and a panel structure, the panel structure is fixedly connected to the circumferential edge of the panel body, the panel structure is used to cover the box opening of the battery box body, and the panel body is provided with a plurality of convex rib structures on the side facing the box body, and the plurality of convex rib structures cross to form a plurality of grid spaces distributed in an array, the grid spaces are used to avoid the convex structures of the battery cells, and at least part of the convex rib structures are away from the end of the panel body to support the battery cells. The application of this technical solution is intended to solve the problem of how to improve the main frequency and mode of the battery box cover to reduce the vibration and abnormal sound of the box cover.

Description

Technical Field

[0001] The present application belongs to the technical field of battery design, and in particular relates to a battery box cover, a battery box, a battery and an electrical device. Background Art

[0002] The battery includes a battery cell and a battery case, and the battery cell is assembled in the assembly space of the battery case, wherein the battery case includes a case body and a case cover, and the case body and the case cover cover each other to form an assembly space. The case cover of the battery case is generally a thin sheet metal part, so that the main frequency and mode of the panel body of the case cover are both low. In this way, when the battery is assembled on an electric vehicle and the electric vehicle is driving, there is an air pressure difference between the inside and outside of the case due to air flow, or the battery case vibrates due to the bumpy driving road, which will cause the panel body of the case cover to easily vibrate and make abnormal noises. Summary of the invention

[0003] The purpose of the present application is to provide a battery box cover, a battery box, a battery and an electrical device, aiming to solve the problem of how to increase the main frequency and mode of the battery box cover to reduce the vibration and abnormal sound of the box cover.

[0004] To achieve the above-mentioned purpose, according to the first aspect of the present application, the technical solution adopted in the present application is: a box cover of a battery box shell, comprising a panel body and a surrounding plate structure, the surrounding plate structure is fixedly connected to the circumferential edge of the panel body, the surrounding plate structure is used to cover the box opening of the box body of the battery box shell, and a plurality of convex rib structures are provided on the side of the panel body facing the box body, the plurality of convex rib structures cross to form a plurality of grid spaces distributed in an array, the grid space is used to avoid the convex structure of the battery cell, and at least part of the convex rib structure is away from the end of the panel body to support the battery cell.

[0005] The box cover provided by the present application is used to assemble the formed battery. By providing a convex rib structure on one side of the panel body of the box cover, the overall mechanical strength of the panel body of the box shell is enhanced, and then the overall main frequency and mode of the box cover are improved. In this way, during the use of the battery, the overall main frequency and mode of the box cover are improved by providing a plurality of convex rib structures, thereby reducing the vibration and abnormal sound of the panel body of the box cover caused by the internal and external air pressure difference or bump vibration of the battery box shell, and reducing the noise generated by the box cover.

[0006] In some embodiments of the present application, the plurality of convex rib structures include a plurality of first convex ribs and a plurality of second convex ribs, the first convex ribs are extended along the first direction, the second convex ribs are extended along the second direction, two adjacent first convex ribs are spaced apart and arranged in parallel, and two adjacent second convex ribs are spaced apart and arranged in parallel. The first convex ribs are arranged in parallel with each other, and the second convex ribs are arranged in parallel with each other, so that the design and arrangement of the first convex ribs and the second convex ribs can be simplified.

[0007] In some embodiments of the present application, the extension direction of the first convex rib is perpendicular to the extension direction of the second convex rib, which helps to optimize the overall mechanical strength of the panel body.

[0008] In some embodiments of the present application, the panel body is square, the extension direction of the first convex rib is parallel to the length direction of the panel body, and the extension direction of the second convex rib is parallel to the width direction of the panel body. In this way, the convex rib structure on the panel body of the box cover tends to be concise and simplified, which is easy to layout and design, and helps to reduce the difficulty of mold opening.

[0009] In some embodiments of the present application, the distance between the end of the first rib away from the panel body and the panel body is greater than or equal to the distance between the end of the second rib away from the panel body and the panel body. The battery cells are limited during the assembly process by each first rib to prevent the battery cells from being displaced relative to each other during the assembly process.

[0010] In some embodiments of the present application, the distance between the end of the first convex rib away from the panel body and the panel body is greater than or equal to 5 mm, and the distance between the end of the second convex rib away from the panel body and the panel body is greater than or equal to 30% of the distance between the end of the first convex rib away from the panel body and the panel body. In this way, the convex rib structure is added to the panel body without substantially increasing the overall thickness of the box cover, thereby improving the overall mechanical strength of the panel body of the box cover, thereby improving the overall main frequency and mode of the box cover.

[0011] In some embodiments of the present application, the panel body and the enclosure structure are integrally formed to improve the molding efficiency of the box cover.

[0012] In some embodiments of the present application, the panel body, the enclosure structure and the convex rib structure are integrally formed to improve the molding efficiency of the box cover.

[0013] In some embodiments of the present application, the rib structure is welded and fixed to a side of the panel body facing the box body.

[0014] According to the second aspect of the present application, the present application provides a battery box shell, wherein the battery box shell comprises a box body and a box cover as described above, wherein the box body forms an inner space with a box opening, and the enclosure structure of the box cover covers the box opening, so that the inner space forms an assembly space, and the assembly space is used to install battery cells.

[0015] According to the third aspect of the present application, the present application provides a battery, wherein the battery comprises a battery cell and the aforementioned battery box shell, wherein the battery cell is installed in the assembly space of the battery box shell.

[0016] The box cover provided by the design of this application is used to assemble and form a battery box shell, and multiple battery cells are assembled in the assembly space of the battery box shell to form a battery. By providing a convex rib structure on one side of the panel body of the box cover, the overall mechanical strength of the panel body of the box cover is enhanced, thereby improving the overall main frequency and mode of the box cover. In this way, during the use of the battery, since the box cover has a plurality of convex rib structures to enhance the overall mechanical strength, the vibration and abnormal sound of the panel body of the box cover caused by the internal and external air pressure difference or bump vibration of the battery box shell is reduced, and the noise generated by the box cover is reduced.

[0017] In some embodiments of the present application, the battery cells are distributed and arranged in multiple columns. The arrangement directions of two adjacent columns of battery cells are set in parallel. A rib structure is provided between the two adjacent columns of battery cells. The extension direction of the rib structure is parallel to the arrangement direction, and the rib structure simultaneously presses against the two columns of battery cells to prevent the battery cells from being shifted in relative position during the assembly process.

[0018] In some embodiments of the present application, the battery further includes a flexible pressure strip, and a flexible pressure strip is provided between two adjacent columns of battery cells, and the extension direction of the flexible pressure strip is parallel to the arrangement direction, and one side of the flexible pressure strip simultaneously abuts against the corresponding two adjacent columns of battery cells, and the other side of the flexible pressure strip abuts against the corresponding convex rib structure. In this way, through the elastic deformation of the flexible pressure strip, not only can the battery cell be abutted and limited, but the convex rib structure can also be effectively prevented from rigidly squeezing the battery cell, thereby avoiding squeezing damage to the battery cell and protecting the integrity and safety of the battery cell.

[0019] In some embodiments of the present application, the flexible pressure strip is connected to the corresponding rib structure by adhesive.

[0020] In some embodiments of the present application, the battery further includes a hard pressure strip, and a hard pressure strip is provided between two adjacent columns of battery cells, and the extension direction of the hard pressure strip is parallel to the arrangement direction, and one side of the hard pressure strip abuts against the corresponding two adjacent columns of battery cells at the same time, and the other side of the hard pressure strip abuts against the corresponding flexible pressure strip. The squeezing force of the abutting limit by the flexible pressure strip and the hard pressure strip is indirectly transmitted to the shoulder positions of the two adjacent columns of battery cells, so that the squeezing force on the shoulder positions of the two adjacent columns of battery cells is basically the same.

[0021] In some embodiments of the present application, the hard pressure strip is connected to the battery cell by adhesive, and the hard pressure strip is connected to the flexible pressure strip by adhesive.

[0022] In some embodiments of the present application, a groove is provided on one side of the hard bead facing the flexible bead, and the extension direction of the groove is arranged parallel to the extension direction of the hard bead. On the one hand, the groove provided on the hard bead can improve the strength of the hard bead itself; on the other hand, the groove can be used to contain glue, so that the glue can be coated on the hard bead without overflowing.

[0023] According to the fourth aspect of the present application, the present application provides an electrical device, wherein the electrical device comprises an electrical load and the aforementioned battery, wherein the battery is electrically connected to the electrical load. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A three-dimensional schematic diagram of a battery box cover of an embodiment of the present application;

[0026] Figure 2 A schematic front view of a battery box cover of an embodiment of the present application;

[0027] Figure 3 for Figure 2 A schematic top view of a battery box cover is shown;

[0028] Figure 4 for Figure 2 Schematic cross-sectional view along the AA direction;

[0029] Figure 5 It is a schematic diagram of an exploded view of a battery according to an embodiment of the present application;

[0030] Figure 6 A partial cross-sectional schematic diagram of a battery according to an embodiment of the present application;

[0031] Figure 7 for Figure 6 The enlarged schematic diagram of point B in the middle;

[0032] Figure 8 is a three-dimensional schematic diagram of a battery cell in a battery according to an embodiment of the present application;

[0033] Fig. 9 This is a schematic diagram of the structure of the electrical equipment according to an embodiment of the present application.

[0034] Among them, the reference numerals in the figure are:

[0035] 100. Battery case;

[0036] 10. Box cover; 11. Panel body; 111. Raised rib structure; 112. Grid space; 113. First raised rib; 114. Second raised rib; 12. Enclosure structure;

[0037] 20. Box body; 21. Box opening; 22. Inner space;

[0038] 200. Battery;

[0039] 210, battery cell; 211, convex structure; 220, flexible pressure strip; 230, hard pressure strip; 231, groove; 232, structural adhesive;

[0040] 300. Electrical equipment;

[0041] 310, electrical load; 320, frame; 330, wheels;

[0042] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0043] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0044] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying 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 specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] At present, from the perspective of market development, the application of power batteries, especially lithium batteries, is becoming more and more widespread (hereinafter, lithium batteries are collectively referred to as batteries). Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as police equipment, military equipment, and aerospace. With the continuous expansion of battery application areas, the market demand is also constantly expanding.

[0048] In the related art, the battery includes a battery cell and a battery case, and the battery cell is assembled in the assembly space of the battery case. The battery case includes a case body and a case cover, and the case body and the case cover cover each other to form an assembly space. Generally, the case cover of the battery case is generally a thin sheet metal part, so that the main frequency and mode of the panel body of the case cover are relatively low. Taking the battery installed in an electric vehicle for power supply as an example, when the electric vehicle is driving, there is an air pressure difference between the inside and outside of the case due to air flow, or the battery case vibrates due to the bumpy driving road, which will cause the panel body of the case cover to easily vibrate and make abnormal noises.

[0049] Based on the above considerations, the embodiment of the present application provides a battery box cover, which has multiple rib structures to enhance the overall mechanical strength, thereby improving the overall main frequency and mode of the box cover. In addition, the box cover and the box body are combined to form a battery box, and then the battery box is used to assemble battery cells to manufacture batteries, and the produced batteries are used to power electrical equipment.

[0050] like Figures 1 to 4As shown, the embodiment of the present application is designed to provide a box cover 10 of a battery box shell 100, which is used to cover the box body 20 of the battery box shell 100, and the battery box shell 100 is used to install a battery cell 210. The box cover 10 includes a panel body 11 and a panel structure 12, the panel structure 12 is fixedly connected to the circumferential edge of the panel body 11, and the panel structure 12 is used to cover the box opening 21 of the box body 20 of the battery box shell 100. In the box cover 10, a side of the panel body 11 facing the box body 20 is provided with a plurality of convex rib structures 111 protruding from the side surface, and the overall mechanical strength of the panel body 11 is enhanced by providing the convex rib structures 111, and the plurality of convex rib structures 111 cross to form a plurality of grid spaces 112 distributed in an array, and the grid spaces 112 are used to avoid the convex structures 211 of the battery cell 210. Furthermore, at least part of the rib structure 111 away from the end of the panel body 11 is used to abut the battery cell 210 to limit the position of the battery cell 210 during assembly and prevent the battery cell 210 from shifting relative to the original position during assembly.

[0051] The box cover 10 provided by the present application is used to assemble the formed battery 200. By providing a convex rib structure 111 on one side of the panel body 11 of the box cover 10, the overall mechanical strength of the panel body 11 of the box cover 10 is enhanced, thereby improving the overall main frequency and mode of the box cover 10. In this way, during the use of the battery 200, since the box cover 10 has an overall mechanical strength enhanced by providing a plurality of convex rib structures 111, the vibration and abnormal sound of the panel body 11 of the box cover 10 caused by the internal and external air pressure difference or bump vibration of the battery box shell 100 is reduced, and the noise generated by the box cover 10 is reduced.

[0052] In some embodiments of the present application, Figures 2 to 4 As shown, the plurality of rib structures 111 include a plurality of first ribs 113 and a plurality of second ribs 114. Figure 2 As shown, the first convex rib 113 is extended along the first direction X (i.e., the extension direction of the first convex rib 113), and the second convex rib 114 is extended along the second direction Y (i.e., the extension direction of the second convex rib 114). Furthermore, two adjacent first convex ribs 113 are arranged at intervals, and the two adjacent first convex ribs 113 are arranged in parallel; two adjacent second convex ribs 114 are arranged at intervals, and the two adjacent second convex ribs 114 are arranged in parallel. In this embodiment, each first convex rib 113 is arranged in parallel to each other, so that the design and arrangement of the first convex rib 113 can be simplified. Similarly, each second convex rib 114 is arranged in parallel to each other, so that the design and arrangement of the second convex rib 114 can also be simplified. In this way, the design structure of the box cover 10 can be simplified, the layout design is easy, and it helps to reduce the difficulty of mold opening.

[0053] Among them, the "parallel" referred to in this application includes absolute parallelism and basic parallelism. Absolute parallelism is parallelism in the mathematical sense, that is, when there are no common points between two straight lines on a plane, two planes in space, and a straight line and a plane, they are called parallel. Basic parallelism is parallelism in a practical sense. In general practice, there will inevitably be errors in the parallelism between two line segment-shaped solid parts. As long as the error is within the allowable error range, it can be called parallel, but it is not absolutely parallel, so it is called basic parallelism. In this application, two adjacent first ribs 113 and two adjacent second ribs 114 are basically parallel.

[0054] In some embodiments of the present application, Figure 1 and Figure 2 As shown, the extension direction of the first rib 113 is perpendicular to the extension direction of the second rib 114 (that is, as shown in FIG. Figure 2 As shown, the first direction X is perpendicular to the second direction Y). In this way, the rib structure 111 on the panel body 11 of the box cover 10 tends to be simple. From a mechanical point of view, the bearing capacity of the intersection position where the first rib 113 and the second rib 114 are perpendicular to each other is better, which helps to optimize the overall mechanical strength of the panel body 11.

[0055] The term "vertical" as used in this application includes absolute verticality and substantially verticality. Absolute verticality is verticality in the mathematical sense, i.e., when a straight line intersects another straight line on a plane and forms a right angle, the two straight lines are perpendicular to each other. Substantially verticality is verticality in the practical sense. In general practice, errors are unavoidable in the verticality of two line segment-shaped solid parts. As long as the error is within the allowable error range, it can be called verticality, but it is not absolutely vertical, so it is called substantially verticality. In this application, the first rib 113 and the second rib 114 are substantially vertical.

[0056] In some embodiments of the present application, Figure 1 and Figure 2As shown, the panel body 11 is in a square shape, and the extension direction of the first convex rib 113 is arranged in parallel with the length direction of the panel body 11 (i.e., the first direction X is the length direction of the panel body 11), and the extension direction of the second convex rib 114 is arranged in parallel with the width direction of the panel body 11 (i.e., the second direction Y is the width direction of the panel body 11). In this embodiment, a plurality of first convex ribs 113 and a plurality of second convex ribs 114 are arranged in a crisscross pattern, which not only makes the convex rib structure 111 on the panel body 11 of the box cover 10 simple and easy to layout and design, but also helps to reduce the difficulty of mold opening, and from a mechanical point of view, the bearing capacity of the intersection position where the first convex rib 113 and the second convex rib 114 are perpendicular to each other is better, which helps to optimize the overall mechanical strength of the panel body 11. Furthermore, the criss-crossed convex rib structures 111 are suitable for resisting and limiting a plurality of battery cells 210 distributed in a rectangular array (including square battery cells 210 and cylindrical battery cells 210 distributed in a rectangular array) to avoid the convex structures 211 of the battery cells 210 .

[0057] In other embodiments of the present application, the panel body 11 is in a square shape, and the extension direction of the first convex rib 113 is set at an acute angle with the length direction of the panel body 11, and the extension direction of the second convex rib 114 is set at an acute angle with the width direction of the panel body 11. The convex rib structure 111 configured in this way helps to optimize the overall mechanical strength of the panel body 11, and is suitable for abutting and limiting a plurality of battery cells 210 distributed in a rectangular array (including square battery cells 210 and cylindrical battery cells 210 distributed in a rectangular array), and is particularly suitable for abutting and limiting a cylindrical battery cell 210 distributed in a rectangular array to avoid the outer convex structure 211 of the battery cell 210.

[0058] In some embodiments of the present application, Figures 1 to 4 As shown, the distance between the end of the first rib 113 away from the panel body 11 and the panel body 11 is greater than the distance between the end of the second rib 114 away from the panel body 11 and the panel body 11, and the distance between the end of the first rib 113 away from the panel body 11 and the panel body 11 is less than the distance between the end of the enclosure structure 12 away from the panel body 11 and the panel body 11. That is, the end of the first rib 113 is used to stop the battery cell 210, and a gap is formed between the end of the second rib 114 and the battery cell 210. The battery cell 210 is limited during the assembly process by each first rib 113 to prevent the battery cell 210 from being relatively offset during the assembly process.

[0059] In some embodiments of the present application, the distance between the end of the first convex rib 113 away from the panel body 11 and the panel body 11 is greater than or equal to 5 mm, and the distance between the end of the first convex rib 113 away from the panel body 11 and the panel body 11 is less than the distance between the end of the enclosure structure 12 away from the panel body 11 and the panel body 11, and the distance between the end of the second convex rib 114 away from the panel body 11 and the panel body 11 is greater than or equal to 30% of the distance between the end of the first convex rib 113 away from the panel body 11 and the panel body 11. In this way, it can reasonably adapt to the overall thickness of the box cover 10, and the convex rib structure 111 is added to the panel body 11 without substantially increasing the overall thickness of the box cover 10, thereby improving the overall mechanical strength of the panel body 11 of the box cover 10, thereby improving the overall main frequency and mode of the box cover 10, and reducing the vibration and abnormal sound of the panel body 11.

[0060] Preferably, the distance between the end of the second convex rib 114 away from the panel body 11 and the panel body 11 is in the range of 30%-60% of the distance between the end of the first convex rib 113 away from the panel body 11 and the panel body 11. That is, when the distance between the end of the first convex rib 113 away from the panel body 11 and the panel body 11 is equal to 5 mm, the distance between the end of the second convex rib 114 away from the panel body 11 and the panel body 11 is in the range of 1.5 mm-3.0 mm.

[0061] In other embodiments of the present application, the distance between the end of the first convex rib 113 away from the panel body 11 and the panel body 11 is equal to the distance between the end of the second convex rib 114 away from the panel body 11 and the panel body 11. At this time, the first convex rib 113 and the second convex rib 114 simultaneously limit the battery cell 210, and can reasonably adapt to the overall thickness of the box cover 10. The convex rib structure 111 is added to the panel body 11 without substantially increasing the overall thickness of the box cover 10, thereby improving the overall mechanical strength of the panel body 11 of the box cover 10, thereby improving the overall main frequency and mode of the box cover 10, and reducing the vibration and abnormal sound of the panel body 11.

[0062] In some embodiments of the present application, the panel body 11 and the enclosure structure 12 are integrally formed to improve the forming efficiency of the box cover 10. In this embodiment, the main structure of the box cover 10 is manufactured by a stamping process, that is, the panel body 11 and the enclosure structure 12 are integrally formed by stamping, and then the specific structure of the enclosure structure 12 is reprocessed, such as trimming the excess edges of the enclosure structure 12, drilling through holes or threaded holes for bolt assembly, and milling the sealing ring installation groove. Further, in this embodiment, each first rib 113 and each second rib 114 can be welded and fixed on the side of the panel body 11 facing the box body 20 through rib conditions independent of the panel body 11 (at this time, when the box cover 10 and the box body 20 are covered, the panel body 11 of the box cover 10 is a plane from the outside).

[0063] In other embodiments of the present application, the panel body 11, the enclosure structure 12 and the convex rib structure 111 are integrally formed to improve the forming efficiency of the box cover 10. In this embodiment, each first convex rib 113 and each second convex rib 114 can be a convex rib structure formed on the panel body 11 by a stamping process (at this time, when the box cover 10 and the box body 20 are closed, from the outside, the panel body 11 of the box cover 10 presents a cross groove shape). That is, this embodiment adopts a stamping process to integrally manufacture and form the panel body 11, the enclosure structure 12 and the convex rib structure 111 of the box cover 10, and the forming efficiency is high.

[0064] In an embodiment of the present application, the following design scheme is adopted: the panel body 11, the enclosure structure 12 and the rib structure 111 of the box cover 10 are integrally manufactured and formed through a stamping process, and the first rib 113 and the second rib 114 are arranged perpendicular to each other and criss-crossed, the extension direction of the first rib 113 is arranged parallel to the length direction of the panel body 11, and the extension direction of the second rib 114 is arranged parallel to the width direction of the panel body 11. Further, the distance between the end of the first rib 113 away from the panel body 11 and the panel body 11 is smaller than the distance between the end of the enclosure structure 12 away from the panel body 11 and the panel body 11, the distance between the end of the first rib 113 away from the panel body 11 and the panel body 11 is greater than or equal to 5 mm, and the distance between the end of the second rib 114 away from the panel body 11 and the panel body 11 ranges from 30% to 60% of the distance between the end of the first rib 113 away from the panel body 11 and the panel body 11.

[0065] According to the second aspect of the present application, the present application provides a battery box shell 100, such as Figure 5The battery case 100 includes a case body 20 and a case cover 10 of the battery case 100 as described above. The case body 20 forms an inner space 22 with a case opening 21. The enclosure structure 12 of the case cover 10 covers the case opening 21, so that the inner space 22 is formed as an assembly space for installing battery cells 210.

[0066] According to the third aspect of the present application, the present application provides a battery 200, such as Figure 5 The battery 200 includes a battery cell 210 and the aforementioned battery case 100 , and the battery cell 210 is installed in the assembly space of the battery case 100 .

[0067] The box cover 10 provided by the design of the present application is used to assemble and form a battery box shell 100, and multiple battery cells 210 are assembled in the assembly space of the battery box shell 100 to form a battery 200. By providing a convex rib structure 111 on one side of the panel body 11 of the box cover 10, the overall mechanical strength of the panel body 11 of the box cover 10 is enhanced, thereby improving the overall main frequency and mode of the box cover 10. In this way, during the use of the battery 200, since the box cover 10 has an overall mechanical strength enhanced by providing multiple convex rib structures 111, the vibration and abnormal sound of the panel body 11 of the box cover 10 caused by the internal and external air pressure difference or bump vibration of the battery box shell 100 is reduced, and the noise generated by the box cover 10 is reduced.

[0068] In some embodiments of the present application, Figure 5 As shown, the battery cells 210 are distributed and arranged in multiple columns, and the arrangement directions of two adjacent columns of battery cells 210 are arranged in parallel. A convex rib structure 111 is provided between the two adjacent columns of battery cells 210, and the extension direction of the convex rib structure 111 is parallel to the arrangement direction, and the convex rib structure 111 simultaneously abuts against the two columns of battery cells 210. That is, the battery cells 210 are distributed in a rectangular array, and the shoulder positions of the two adjacent columns of battery cells 210 are simultaneously abutted and limited by the convex rib structure 111 (i.e., the first convex rib 113), so as to prevent the relative position shift of the battery cells 210 during the assembly process.

[0069] like Figure 8 As shown, the battery cell 210 used in the present application is a square battery cell, and a convex structure 211 is provided on one side of the battery cell 210, wherein the convex structure 211 includes but is not limited to a positive terminal, a negative terminal, a pressure relief mechanism (the pressure relief mechanism is generally an explosion-proof valve), etc. Generally, when assembling the battery cell 210, as Figure 5As shown, the battery cell 210 is placed into the box body 20 with the side of the battery cell 210 provided with the convex structure 211 facing the box cover 10, and then the box cover 10 is closed, so that the convex rib structure 111 can press against and limit the battery cell 210 to prevent the battery cell 210 from being relatively shifted in position during the assembly process. In addition, the multiple grid spaces 112 distributed in an array formed by the cross-section of multiple convex rib structures 111 can avoid the convex structure 211 of the battery cell 210.

[0070] In some embodiments of the present application, Figure 6 and Figure 7 As shown, the battery 200 further includes a flexible bead 220, and a flexible bead 220 is provided between two adjacent columns of battery cells 210, and the extension direction of the flexible bead 220 is parallel to the arrangement direction, and one side of the flexible bead 220 simultaneously abuts against the corresponding two adjacent columns of battery cells 210, and the other side of the flexible bead 220 abuts against the corresponding convex rib structure 111. When the box cover 10 is closed to the box opening 21 of the box body 20, the convex rib structure 111 (i.e., the first convex rib 113) will squeeze the corresponding flexible bead 220, so that the flexible bead 220 is elastically deformed. In this way, through the elastic deformation of the flexible bead 220, not only can the battery cell 210 be abutted and limited, but also the convex rib structure 111 (i.e., the first convex rib 113) can be effectively prevented from causing rigid extrusion of the battery cell 210, thereby avoiding the battery cell 210 from being extruded and damaged, and protecting the integrity and safety of the battery cell 210. Furthermore, the ability of the flexible pressure strip 220 to undergo elastic deformation under compression helps to absorb and adjust the assembly tolerance when the box cover 10 and the box body 20 are covered with each other, thereby ensuring the outer contour accuracy of the battery 200.

[0071] In some embodiments of the present application, the flexible bead 220 is connected to the corresponding rib structure 111 by adhesive. When assembling the flexible bead 220, the flexible bead 220 is glued and positioned on the rib structure 111 (i.e., the first rib 113) by gluing, and then the box cover 10 is closed to the box opening 21 of the box body 20. Then, the side of the flexible bead 220 that is away from the rib structure 111 will simultaneously press against the shoulders of the two adjacent columns of battery cells 210, thereby pressing against and limiting the battery cells 210 to prevent the relative position of the battery cells 210 from shifting during the assembly process. In this way, the assembly efficiency of the flexible bead 220 is greatly improved.

[0072] In some embodiments of the present application, Figure 6 and Figure 7As shown, the battery 200 includes a flexible pressure strip 220 and a hard pressure strip 230. In order to reduce the large difference in the stress of the two adjacent columns of battery cells 210, a hard pressure strip 230 is provided between the two adjacent columns of battery cells 210. The extension direction of the hard pressure strip 230 is parallel to the arrangement direction, and one side of the hard pressure strip 230 presses against the corresponding two adjacent columns of battery cells 210 at the same time, and the other side of the hard pressure strip 230 presses against the corresponding flexible pressure strip 220, and the side of the flexible pressure strip 220 facing away from the hard pressure strip 230 presses against the corresponding convex rib structure 111. In this way, when the box cover 10 is closed on the box opening 21 of the box body 20, the rib structure 111 (i.e., the first rib 113) will squeeze the corresponding flexible bead 220, causing the flexible bead 220 to deform elastically, and the flexible bead 220 will transfer the squeezing force to the hard bead 230, causing the hard bead 230 to press against the shoulders of the two adjacent columns of battery cells 210 to prevent the battery cells 210 from shifting relative to each other during assembly. The squeezing force of the flexible bead 220 and the hard bead 230 is indirectly transferred to the shoulders of the two adjacent columns of battery cells 210, so that the squeezing forces on the shoulders of the two adjacent columns of battery cells 210 are substantially the same.

[0073] In some embodiments of the present application, the flexible bead 220 is connected to the corresponding rib structure 111 by adhesive, and the hard bead 230 is connected to the battery cell 210 by adhesive. When assembling the flexible bead 220 and the hard bead 230, the flexible bead 220 can be firstly glued and positioned on the rib structure 111 (i.e., the first rib 113) by gluing, and then the hard bead 230 is prevented from adhering to the shoulders of the two adjacent columns of battery cells 210 by gluing, and then the box cover 10 is closed to the box opening 21 of the box body 20, so that the side of the flexible bead 220 away from the rib structure 111 abuts against the side of the hard bead 230 away from the battery cell 210, and the flexible bead 220 elastically deforms to limit the battery cell 210, thereby preventing the battery cell 210 from being relatively offset during the assembly process. In this way, the assembly efficiency of the flexible bead 220 and the hard bead 230 is greatly improved.

[0074] Furthermore, the hard bead 230 and the flexible bead 220 are connected by adhesive, so that the relative position between the flexible bead 220 and the hard bead 230 is firm and stable, and the relative position between the flexible bead 220 and the hard bead 230 is not easy to be separated. Figure 7As shown, the hard pressure strip 230 and the flexible pressure strip 220 are bonded and fixed by structural adhesive 232. Among them, the structural adhesive 232 has the advantages of high strength, aging resistance, fatigue resistance, corrosion resistance, and the ability to withstand large loads. The structural adhesive 232 has stable performance within the expected life and is suitable for adhesives for structural parts that withstand strong forces. In addition, the flexible pressure strip 220 and the corresponding rib structure 111 are bonded and positioned by double-sided adhesive, and the hard pressure strip 230 and the battery cell 210 are bonded and positioned by double-sided adhesive.

[0075] In other embodiments of the present application, when assembling the flexible bead 220 and the hard bead 230, the hard bead 230 and the flexible bead 220 may be sequentially stacked on the shoulders of two adjacent columns of battery cells 210. That is, the hard bead 230 is positioned on the shoulders of two adjacent columns of battery cells 210 by bonding with double-sided adhesive, and then the structural adhesive 232 is coated on the hard bead 230, and then the flexible bead 220 is bonded to the structural adhesive 232, and then the double-sided adhesive is affixed to the side of the flexible bead 220 away from the hard bead 230. Then, the box cover 10 is closed on the box opening 21 of the box body 20, so that the convex rib structure 111 abuts against the flexible bead 220, and the flexible bead 220 and the convex rib structure 111 are squeezed against each other and bonded by the double-sided adhesive.

[0076] In some embodiments of the present application, Figure 7 As shown, a groove 231 is provided on one side of the hard bead 230 facing the flexible bead 220, and the groove 231 is used to contain glue (i.e., structural glue 232), and the extension direction of the groove 231 is arranged parallel to the extension direction of the hard bead 230. On the one hand, the groove 231 arranged on the hard bead 230 can improve the strength of the hard bead 230 itself; on the other hand, the groove 231 can be used to contain glue, so that the glue can be coated on the hard bead 230 without overflowing, so that the hard bead 230 and the flexible bead 220 are conveniently bonded.

[0077] According to the fourth aspect of the present application, the present application provides an electrical device 300, such as Fig. 9 The power-consuming device 300 includes a power load 310 and the aforementioned battery 200, and the battery 200 is electrically connected to the power load 310 to supply power.

[0078] The electric devices 300 include but are not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include but are not limited to fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include but are not limited to airplanes, rockets, space shuttles, and spacecraft, etc.

[0079] In the embodiment of the present application, the electric device 300 is an electric vehicle, such as Fig. 9 As shown, the battery 200 is installed on the frame 320 of the electric vehicle. The battery 200 provided by the embodiment of the present application is used to power the driving motor (i.e., the electric load 310) of the electric vehicle, and the driving motor drives the wheel 330 to rotate, so that the electric vehicle can travel normally.

[0080] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery box cover, characterized in that: It includes a panel body and a surrounding plate structure, wherein the surrounding plate structure is fixedly connected to the circumferential edge of the panel body, and the surrounding plate structure is used to cover the box opening of the box body of the battery box shell. The panel body is provided with a plurality of convex rib structures on the side facing the box body, and the plurality of convex rib structures are crossed to form a plurality of grid spaces distributed in an array, and the grid spaces are used to avoid the protruding structures of the battery cells, and at least part of the convex rib structures are used to abut the battery cells at the end away from the panel body.

2. The battery box cover according to claim 1, characterized in that: The plurality of convex rib structures include a plurality of first convex ribs and a plurality of second convex ribs, two adjacent first convex ribs are spaced apart and arranged in parallel, and two adjacent second convex ribs are spaced apart and arranged in parallel.

3. The battery box cover according to claim 2, characterized in that: An extension direction of the first convex rib is perpendicular to an extension direction of the second convex rib.

4. The battery box cover according to claim 2 or 3, characterized in that: The panel body is in a square shape, the extending direction of the first convex rib is parallel to the length direction of the panel body, and the extending direction of the second convex rib is parallel to the width direction of the panel body.

5. The battery box cover according to any one of claims 2 to 4, characterized in that: A distance between an end of the first convex rib away from the panel body and the panel body is greater than or equal to a distance between an end of the second convex rib away from the panel body and the panel body.

6. The battery box cover according to any one of claims 2 to 4, characterized in that: The distance between the end of the first rib away from the panel body and the panel body is greater than or equal to 5 mm, and the distance between the end of the second rib away from the panel body and the panel body is greater than or equal to 30% of the distance between the end of the first rib away from the panel body and the panel body.

7. The battery box cover according to any one of claims 1 to 6, characterized in that: The panel body and the enclosure structure are integrally formed.

8. The battery box cover according to any one of claims 1 to 6, characterized in that: The panel body, the enclosure structure and the rib structure are integrally formed.

9. The battery box cover according to any one of claims 1 to 7, characterized in that: The convex rib structure is welded and fixed to a side of the panel body facing the box body.

10. A battery box shell, characterized in that: A battery box shell comprising a box body and a box cover as described in any one of claims 1 to 9, wherein the box body forms an inner space having a box opening, and the enclosure structure of the box cover covers the box opening so that the inner space is formed into an assembly space for installing battery cells.

11. A battery, characterized in that: The invention comprises a battery cell and the battery case as claimed in claim 10, wherein the battery cell is installed in the assembly space of the battery case.

12. The battery according to claim 11, characterized in that: The battery cells are distributed and arranged in multiple columns. The arrangement directions of the battery cells in two adjacent columns are parallel. A convex rib structure is provided between the battery cells in two adjacent columns. The extension direction of the convex rib structure is parallel to the arrangement direction, and the convex rib structure abuts against the battery cells in the two columns at the same time.

13. The battery according to claim 12, characterized in that: The battery also includes a flexible strip, which is provided between two adjacent columns of battery cells, and the extension direction of the flexible strip is parallel to the arrangement direction, and one side of the flexible strip simultaneously abuts against the corresponding two adjacent columns of battery cells, and the other side of the flexible strip abuts against the corresponding convex rib structure.

14. The battery according to claim 13, characterized in that: The flexible pressure strips are connected to the corresponding rib structures by adhesive.

15. The battery according to claim 13 or 14, characterized in that: The battery also includes a hard pressure strip, which is provided between two adjacent columns of battery cells. The extension direction of the hard pressure strip is parallel to the arrangement direction, and one side of the hard pressure strip simultaneously abuts against the corresponding two adjacent columns of battery cells, and the other side of the hard pressure strip abuts against the corresponding flexible pressure strip.

16. The battery according to claim 15, characterized in that: The hard pressure strip is connected to the battery cell by adhesive, and the hard pressure strip is connected to the flexible pressure strip by adhesive.

17. The battery according to claim 15 or 16, characterized in that: A groove is provided on one side of the hard pressure strip facing the flexible pressure strip, and an extension direction of the groove is parallel to an extension direction of the hard pressure strip.

18. An electrical equipment, characterized in that: It comprises an electrical load and a battery as described in any one of claims 11 to 17, wherein the battery is electrically connected to the electrical load.

Images