Cylindrical battery top cover

Abstract

The utility model provides a cylindrical battery top cover, and aims to solve the technical problem of insufficient anti-rotation limiting among components of the conventional battery top cover. A first mounting groove is formed in the top surface of a cover plate, and a first limiting groove is formed in the junction of the area, except the first mounting groove, of the top surface of the cover plate and the first mounting groove; the upper plastic part is inserted into the first mounting groove in a matched mode, a second mounting groove is formed in the top face, and a second limiting column is connected to the groove edge of the second mounting groove. A first limiting column matched with the first limiting groove is fixedly arranged on the outer wall of the upper plastic part; when the upper plastic part is inserted into the first mounting groove, the first limiting column is inserted into the first limiting groove so as to limit the circumferential movement of the upper plastic part relative to the cover plate; a groove matched with the second limiting column is formed in the outer wall of the riveting block; and the cover plate, the upper plastic part and the riveting block sequentially penetrate through the pole and are hermetically assembled. Through the occlusion assistance between the limiting column groups of the components of the cylindrical battery top cover and the corresponding grooves, the pole can be prevented from rotating when the pole is subjected to rotating impact.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power battery accessories, and in particular to a cylindrical battery top cover. BACKGROUND

[0002] The existing cylindrical battery top cover generally comprises a cover plate, a plastic part and a riveting block and the like components, and is usually assembled with a cylindrical pole through riveting. The technicians find that if the anti-rotation limiting between the components of the top cover is insufficient, the busbar will drive the pole / connector to rotate when the vehicle is long-term vibrated / twisted or roller tested, thereby directly impacting the stability of the battery structure, causing the riveting top cover structure (riveting stability, sealing ring wear and the like) to be damaged, and further causing the technical problems of top cover liquid leakage, inability to normally charge and discharge and overcurrent, and affecting the service life of the battery. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the above technical problems, the application provides a cylindrical battery top cover, which comprises:

[0004] a cover plate, the top surface of which is provided with a first mounting groove, and a first limiting groove is arranged at the junction between the top surface area of the cover plate outside the first mounting groove and the first mounting groove;

[0005] an upper plastic part, which is matched and inserted into the first mounting groove, and the top surface of the upper plastic part is provided with a second mounting groove, and a second limiting column is connected to the groove of the second mounting groove; a first limiting column matched with the first limiting groove is fixedly arranged on the outer wall of the upper plastic part; when the upper plastic part is inserted into the first mounting groove, the first limiting column is inserted into the first limiting groove to limit the circumferential movement of the upper plastic part relative to the cover plate;

[0006] a riveting block, the outer wall of which is provided with a groove matched with the second limiting column to limit the circumferential movement of the riveting block relative to the upper plastic part;

[0007] Among them, the cover plate, the upper plastic part and the riveting block are sequentially penetrated through the pole and sealedly assembled.

[0008] Further, the upper plastic part further comprises an insertion part; the insertion part is matched and inserted into the first mounting groove, so that the outer wall of the insertion part is in contact with the groove of the first mounting groove; the top surface of the insertion part is provided with a second mounting groove; and the outer wall of the insertion part is fixedly provided with a first limiting column matched with the first limiting groove.

[0009] Further, the first mounting groove is in a stepped groove structure.

[0010] Further, the first limiting groove located at the cover plate is at least spaced apart by two along the circumference of the first mounting groove.

[0011] Further, the bottom end of the plug-in part is coaxially provided with a circular truncated cone part.

[0012] Further, the upper plastic part further comprises a convex ring connected to the outer wall of the plug-in part; the bottom end of the convex ring is connected to the top end of the first limiting column group and the top end of the cover plate.

[0013] Further, at least two second limiting columns are connected to the groove of the second installation groove along the circumference of the second installation groove.

[0014] Further, the cylindrical battery top cover further comprises a lower plastic part; the lower plastic part is arranged at the bottom end of the cover plate.

[0015] Further, the cover plate is provided with a first installation hole matched with the circular truncated cone part in the first installation groove; the upper plastic part is provided with a second installation hole in the second installation groove, the second installation hole is arranged through the circular truncated cone part; the riveting block is provided with a riveting hole; the lower plastic part is provided with a third installation hole; the second installation hole, the riveting hole and the third installation hole are all arranged matched with the first installation hole;

[0016] Among them, the cover plate, the upper plastic part, the riveting block and the lower plastic part are respectively sleeved on the outer wall of the pole column through the corresponding matched installation holes.

[0017] Further, the riveting hole is composed of a circular truncated hole and a circular cylinder hole arranged matched at both ends of the circular truncated hole, so that the diameters of the top and bottom circular surfaces of the circular truncated hole are the same as the diameters of the circular cylinder holes connected thereto.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] Through the engagement of the limiting column group and the corresponding groove of each component of the cylindrical battery top cover, stress compensation / limiting can be achieved when the pole column is subjected to rotational impact, that is, the pole column can be prevented from rotating, thereby avoiding the risks of seal ring wear and leakage, inability to normally charge and discharge, overcurrent, etc., and improving the service life of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 It is an internal structure cross-sectional view of a cylindrical battery top cover according to an embodiment of the present application.

[0022] Figure 2A structure schematic view of a cover plate of a cylindrical battery top cover of an embodiment of the present application;

[0023] Figure 3 A structure schematic view of an upper plastic piece of a cylindrical battery top cover of an embodiment of the present application;

[0024] Figure 4 A structure schematic view of an upper plastic piece of a cylindrical battery top cover of an embodiment of the present application;

[0025] Figure 5 A structure schematic view of a riveting block of a cylindrical battery top cover of an embodiment of the present application.

[0026] Reference signs:

[0027] 10, cover plate; 100, first mounting slot; 101, first limiting groove group;

[0028] 20, upper plastic piece; 200, plug-in part; 201, first limiting column group; 202, circular table part; 203, convex ring; 204, second mounting hole; 205, second mounting slot; 206, second limiting column group;

[0029] 30, riveting block; 300, groove group; 301, riveting hole; 301a, upper cylindrical hole; 301b, lower cylindrical hole; 301c, circular table hole;

[0030] 40, lower plastic piece;

[0031] 50, pole column;

[0032] 60, sealing ring. DETAILED DESCRIPTION

[0033] In the following, only certain example embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be essentially exemplary rather than limiting.

[0034] In the description of the present application, it is understood that the terms "top", "bottom", "inner", "outer", "axial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of the technical features indicated. Thus, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0036] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. 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.

[0037] In the present application, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or it can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and oblique above of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and oblique below of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0038] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides specific examples of processes, but those skilled in the art can realize the use of other processes.

[0039] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0040] The present application provides a cylindrical battery top cover, please refer to Figures 1-5 The cylindrical battery top cover includes a cover plate 10, an upper plastic part 20, a riveting block 30, a lower plastic part 40 and a pole 50.

[0041] Specifically,

[0042] The cover plate 10 is provided with a first installation groove 100 on the top surface thereof, which is in a stepped groove structure. A first limiting groove 101 is provided at the junction between the top surface region of the cover plate outside the first installation groove 100 and the first installation groove, and the first limiting groove 101 is provided in at least two along the circumference of the first installation groove. The structure of the first limiting groove 101 is not limited, and can be a cylindrical groove structure or a cuboid groove structure, etc. A first installation hole extending along the axial direction of the cover plate is provided in the first installation groove, and the hole axis of the first installation hole is coaxial with the plate axis of the cover plate 10.

[0043] The upper plastic part 20 includes a plug-in part 200, a first limiting column group 201, and a convex ring 203. The upper plastic part 20 is installed by the cooperation between the first limiting column group 201 and the first limiting groove group 101, and the circumferential movement of the upper plastic part 20 relative to the cover plate 10 is limited.

[0044] The plug-in part 200 is provided with a circular truncated cone part 202 on the bottom surface thereof, and the top circular end surface of the circular truncated cone part 202 has a larger diameter than the bottom circular end surface. The circular truncated cone part 202 is matched with the first installation hole, i.e., the outer diameter of the top surface of the circular truncated cone part 202 is equal to the inner diameter of the first installation hole. The plug-in part 200 is matched with the first installation groove, so that the outer wall of the plug-in part 200 is in contact with the groove wall of the first installation groove, and the circular truncated cone part 202 is located in the first installation hole. A second installation groove 205 is provided on the top surface of the plug-in part 200, and a second installation hole 204 matched with the first installation hole is provided in the second installation groove, i.e., when the plug-in part 200 is placed in the first installation groove 100, the second installation hole 204 and the first installation hole are coaxial. At least two second limiting column groups 206 are connected in the second installation groove along the circumferential direction of the groove.

[0045] A plurality of first limiting columns are matched with the first limiting groove group 101 and are fixed to the outer wall of the plug-in part 200 along the circumferential direction of the plug-in part 200, so that each first limiting column can be plugged into the corresponding first limiting groove.

[0046] The convex ring 203 is matched with the outer wall of the plug-in part, i.e., the inner diameter of the convex ring 203 is equal to the outer diameter of the plug-in part. The bottom end of the convex ring is connected with the first limiting column group 201.

[0047] Based on this, when the plug-in part 200 of the upper plastic part 20 is plugged into the first installation groove, each first limiting column can be plugged into the corresponding first limiting groove, so as to limit the circumferential rotation of the upper plastic part 20 relative to the cover plate 10.

[0048] The riveting block 30 is provided with a groove set 300 matching the second limiting column set 206 on its outer wall in the circumferential direction, so that the circumferential movement of the riveting block 30 placed on the upper plastic part is limited. The riveting block 30 is provided with a riveting hole 301 matching the first mounting hole in the axial direction, and the riveting hole 301 and the first mounting hole are coaxially arranged when the riveting block 30 is placed in the second mounting groove 205. A ring groove is arranged at the junction between the riveting hole 301 and the top surface area of the riveting block outside the riveting hole 301, and the ring groove is communicated with the riveting hole 301.

[0049] Further, the riveting hole 301 is composed of an upper cylindrical hole 301a and a lower cylindrical hole 301b respectively matching two ends of a circular table hole 301c, so that the diameters of the top and bottom circular surfaces of the circular table hole 301c are the same as the diameters of the cylindrical holes connected thereto.

[0050] Based on this, when the riveting block 301 is placed in the second mounting groove of the upper plastic part 20, the riveting block 30 placed on the upper plastic part is limited in circumferential movement by the cooperation and insertion of the groove set 300 and the second limiting column set 206 of the upper plastic part 20.

[0051] The lower plastic part 40 is arranged at the bottom end of the cover plate and is made of insulating material such as plastic. The lower plastic part 40 is provided with a third mounting hole matching the first mounting hole in the axial direction, and the third mounting hole and the first mounting hole are coaxially arranged when the cover plate 10 is assembled on the lower plastic part 40.

[0052] The pole column 50 is arranged in sequence from the bottom to the top through the third mounting hole, the first mounting hole, the second mounting hole 204 and the riveting hole 301. The outer wall of the pole column is arranged in close contact with the second mounting hole 204 and the riveting hole 301, and the sealing ring 60 is arranged between the outer wall of the pole column in the cover plate and the third mounting hole and the first mounting hole to seal the gap between the pole column 50 and the top cover of the cylindrical battery.

[0053] Based on the above embodiment, the assembly steps and working principle of the cylindrical battery top cover of the present application are as follows:

[0054] The assembly steps of the cylindrical battery top cover are: 1) after the sealing ring 60 is sleeved on the pole, the pole 50 is placed in the riveting mold, and the clamp is positioned; 2) the third mounting hole of the lower plastic part 40 is sleeved on the pole 50, and the lower plastic part 40 is placed in the riveting mold; 3) the first mounting hole is sleeved on the pole 50, and the cover plate 10 is placed in the riveting mold; 4) the upper plastic part 20 is placed in the first installation groove, and the upper plastic part 20 is limited and assembled at the cover plate 10 through the matching insertion between the first limiting column group 201 and the first limiting groove group 101; 5) the riveting block 30 is placed in the second installation groove, and the riveting block 30 is limited and assembled on the upper plastic part 20 through the matching insertion between the groove group 300 and the second limiting column group 206; 6) the riveting clamp presses down the riveting block 30, and the expansion riveting is completed (above the circular table hole 301c); 7) the connection between the upper end edge of the pole and the riveting block 30 is fixed by laser welding.

[0055] After assembly, the working principle of the cylindrical battery top cover is: when the vehicle is shaken or the roller test is carried out, the gasket gives the pole 50 a rotating impact, and through the engagement and adaptation of the first limiting column group 201 of the upper plastic part 20 and the first limiting column group 101 of the cover plate 10 and the matching engagement and adaptation of the second limiting column group 206 of the upper plastic part 20 and the groove group 300 of the riveting block 30, the circumferential rotation between the components of the cylindrical battery top cover is effectively prevented.

[0056] Based on the above embodiment, the advantages of the present application are:

[0057] Through the engagement and assistance between the limiting column group of each component of the cylindrical battery top cover and the corresponding groove, when the pole 50 is subjected to a rotating impact, stress offset / limiting can be performed, that is, the pole 50 can be prevented from rotating, so that the risks of sealing ring 60 wear and leakage, inability to normally charge and discharge, overcurrent, etc. can be avoided, and the service life of the battery can be improved.

Claims

1. A cylindrical battery top cover, characterized by, It comprises: A cover plate, the top surface is provided with a first installation slot, and a first limiting slot is arranged at the junction between the top surface area of the cover plate outside the first installation slot and the first installation slot; An upper plastic part, which is matched and inserted into the first installation slot, and the top surface is provided with a second installation slot, and a second limiting column is connected along the groove of the second installation slot; a first limiting column matched with the first limiting slot is fixedly arranged on the outer wall of the upper plastic part; when the upper plastic part is inserted into the first installation slot, the first limiting column is inserted into the first limiting slot to limit the circumferential movement of the upper plastic part relative to the cover plate; A riveting block, the outer wall of which is provided with a groove matched with the second limiting column to limit the circumferential movement of the riveting block relative to the upper plastic part; Wherein, the cover plate, the upper plastic part, the riveting block and the lower plastic part are sequentially penetrated through the pole and sealedly assembled.

2. The cylindrical battery top cover according to claim 1, characterized in that: The upper plastic part further comprises an insertion part; the insertion part is matched and inserted into the first installation slot, so that the outer wall of the insertion part is in contact with the groove of the first installation slot; the top surface of the insertion part is provided with a second installation slot; the outer wall of the insertion part is fixedly provided with a first limiting column matched with the first limiting slot.

3. The cylindrical battery top cover according to claim 2, characterized in that: The first installation slot is in a stepped groove structure.

4. The cylindrical battery top cover according to claim 3, characterized in that: The first limiting slot located at the cover plate is at least spaced by two along the circumference of the first installation slot.

5. The cylindrical battery top cover according to claim 4, characterized in that: The bottom end of the insertion part is coaxially provided with a circular truncated cone part.

6. The cylindrical battery top cover according to claim 1, wherein: The upper plastic part further comprises a convex ring matched and connected to the outer wall of the insertion part; the bottom end of the convex ring is in contact with the top end of the first limiting column and the top end of the cover plate.

7. The cylindrical battery top cover according to claim 1, wherein: At least two second limiting columns are connected along the groove of the second installation slot along the circumference of the second installation slot.

8. The cylindrical battery top cover according to claim 5, wherein, It further comprises a lower plastic part; the lower plastic part is arranged at the bottom end of the cover plate.

9. The cylindrical battery top cover according to claim 8, characterized in that: The cover plate is provided with a first installation hole matched with the circular truncated cone part in the first installation slot of the cover plate; the upper plastic part is provided with a second installation hole in the second installation slot of the upper plastic part, and the second installation hole is arranged through the circular truncated cone part; the riveting block is provided with a riveting hole; the lower plastic part is provided with a third installation hole; the second installation hole, the riveting hole and the third installation hole are all arranged matched with the first installation hole; Wherein, the cover plate, the upper plastic part, the riveting block and the lower plastic part are respectively sleeved on the outer wall of the pole through the corresponding matched installation holes.

10. The cylindrical battery top cover according to claim 9, characterized in that: The riveting hole is composed of a circular truncated cone hole and a cylindrical hole matched at both ends of the circular truncated cone hole, so that the diameters of the top and bottom circular surfaces of the circular truncated cone hole are the same as the diameters of the cylindrical holes connected thereto.

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