CN220400743U - Cover plate for cylindrical battery and cylindrical battery - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a cover plate for a cylindrical battery and the cylindrical battery, and aims to solve the problem that the support force of the cover plate of the conventional cylindrical battery on a winding core is insufficient. For this purpose, the cover plate of the cylindrical battery of the present utility model comprises a cover body and a support member disposed on the cover body to support the winding core of the cylindrical battery, the support member being disposed at a side of the cover body facing the winding core. According to the cover plate, the support piece is arranged on the inner surface of the cover body to support the winding core, so that the support force of the cover plate on the winding core can be improved, the winding core is prevented from being laid down and deformed, and the safety of a battery is improved.

Description

Cover plate for cylindrical battery and cylindrical battery

Technical Field

The utility model relates to the technical field of batteries, and particularly provides a cover plate for a cylindrical battery and the cylindrical battery.

Background

Along with the increasing serious world-wide energy crisis and environmental pollution problems, the requirements of people on energy conservation and emission reduction of automobiles are gradually increased. New energy automobiles are receiving more and more attention due to the characteristics of low noise, no pollution, high energy efficiency and the like, thereby promoting the accelerated development of the new energy automobiles. Currently, a new energy automobile usually uses a battery as a power source, which provides a wide space for the application and development of the battery.

The cylindrical battery is more and more focused, and mainly comprises a shell, a cover plate, a winding core, a negative electrode current collecting disc, a positive electrode current collecting disc and other parts, wherein the bottom end of the shell is provided with an opening, the cover plate is arranged at the bottom of the shell, the opening at the bottom is closed, and the winding core, the negative electrode current collecting disc and the positive electrode current collecting disc are all arranged in the shell.

The winding core is generally formed by winding a positive plate, a negative plate and a diaphragm, wherein a positive lug is arranged at the top end of the winding core, the positive lug is electrically connected with the positive plate, a negative lug is arranged at the bottom end of the winding core, the negative lug is electrically connected with the negative plate, a positive current collecting disc is positioned right above the winding core, the positive current collecting disc is fixedly connected with a shell, the positive lug of the winding core is electrically connected with the positive current collecting disc, the positive lug is fixedly connected with the positive current collecting disc in a welding mode, the negative current collecting disc is positioned right below the winding core, the negative current collecting disc is also fixedly connected with the shell, the negative lug is also fixedly connected with the negative current collecting disc in a welding mode, and an insulation structure is arranged between the positive current collecting disc or the negative current collecting disc and the shell so as to avoid short circuit.

The apron is located the negative pole mass flow disk under, supports in the bottom of negative pole mass flow disk, because the intensity of negative pole mass flow disk is weaker, and the weight of rolling up the core has all fallen on the apron, is actually supported the core by the apron. However, the cover plate of the existing battery has insufficient supporting force on the winding core, so that the winding core is laid down and deformed, and therefore, the pole pieces are misplaced, and the internal short circuit of the battery is seriously caused.

Accordingly, there is a need in the art for a new solution to the above-mentioned problems.

Disclosure of Invention

The utility model aims to solve the technical problems, namely the problem that the support force of the cover plate of the conventional cylindrical battery to the winding core is insufficient.

In a first aspect, the present utility model provides a cover plate for a cylindrical battery, the cover plate including a cover body and a support member disposed on the cover body to support a winding core of the cylindrical battery, the support member being disposed at a side of the cover body facing the winding core.

In the preferred technical scheme of the cover plate, the cover body comprises a first body and a second body, in the axial direction, the first body is close to the winding core and the second body is far away from the winding core, and the supporting piece is arranged on the first body.

In the preferable technical scheme of the cover plate, the second body is provided with an explosion-proof structure at one side facing the supporting piece; and/or the second body is provided with an explosion-proof structure at one side facing away from the supporting piece.

In the preferred technical scheme of the cover plate, the cover body further comprises a boss which is positioned on the inner side of the second body in the circumferential direction and is arranged towards one side close to the winding core, and the boss is provided with a liquid injection hole.

In the preferred technical scheme of the cover plate, a groove is formed in the cover body at a position corresponding to the boss on one side away from the winding core.

In the preferred technical scheme of the cover plate, the support member is provided with a through hole at a position corresponding to the liquid injection hole, and the through hole penetrates through the support member along the thickness direction of the support member.

In the preferred technical scheme of the cover plate, the aperture of the through hole is larger than the aperture of the liquid injection hole.

In the preferred technical scheme of the cover plate, the supporting piece comprises a base body and supporting ribs, the number of the supporting ribs is multiple and the supporting ribs are distributed at intervals along the circumferential direction of the base body, one end of each supporting rib is fixedly connected with the base body or integrally arranged with the base body, and the other end of each supporting rib is fixedly connected with the first body.

In the preferred technical solution of the cover plate, the supporting member is riveted and fixed with the cover body.

In a second aspect, the present utility model provides a cylindrical battery comprising a cover plate as described above.

Under the condition of adopting the technical scheme, the cover plate supports the winding core by arranging the supporting piece on the inner surface of the cover body, so that the supporting force of the cover plate on the winding core can be improved, the winding core is prevented from being laid down and deformed, and the safety of the battery is improved.

Furthermore, the cover plate is arranged on the second body, so that the situation that the explosion-proof structure is extruded by the supporting piece to be opened in advance can be avoided, and the stability of the battery is improved.

Still further, the cover plate of the utility model can improve the connection stability of the sealing nail and the cover plate and the tightness of the liquid injection hole by arranging the groove on one side of the cover body far away from the winding core, wherein the groove is used for accommodating the sealing nail for sealing the liquid injection hole.

Still further, the cover plate is beneficial to improving the liquid injection efficiency and the overall infiltration performance by arranging the through holes on the supporting piece.

Still further, the cover plate of the utility model is beneficial to improving the liquid injection efficiency by making the aperture of the through hole larger than that of the liquid injection hole, thereby improving the production efficiency of the battery.

Still further, the cover plate of the utility model can reduce the weight and the production cost of the cover plate on the basis of ensuring sufficient supporting force by arranging the supporting piece in the structure form of a matrix and a plurality of supporting ribs.

Still further, the cover plate of the utility model fixedly connects the support piece with the cover body in a riveting way, so that the welding procedure can be saved, and the production cost can be further reduced.

In addition, the cylindrical battery further provided by the utility model further comprises the cover plate, so that the cylindrical battery has the technical effects of the cover plate.

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

fig. 1 is a partial cross-sectional view of a cylindrical battery of the present utility model;

fig. 2 is a schematic perspective view of a cap plate of the cylindrical battery of the present utility model;

FIG. 3 is a schematic top view of the cover plate of the cylindrical battery of the present utility model;

fig. 4 is a schematic cross-sectional view of a cap plate of a cylindrical battery of the present utility model.

List of reference numerals:

1. a housing;

2. a cover plate; 21. a cover body; 22. a support;

211. a first body; 212. a second body; 213. a liquid injection hole; 214. a boss; 215. a groove; 216. explosion-proof nicks; 221. a base; 222. a support rib; 2211. a through hole; 2221. riveting points;

3. a winding core;

4. a negative electrode current collecting plate.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "inner", "outer", "upper", "lower", "top", "bottom", and the like, which indicate a direction or a positional relationship, are based on the direction or the positional relationship shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "mounted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Specifically, referring first to fig. 1, fig. 1 is a partial cross-sectional view of a cylindrical battery of the present utility model.

The utility model provides a cylindrical battery, which comprises a shell 1, a cover plate 2 and a winding core 3 as shown in fig. 1. Wherein the bottom of the housing 1 has an opening, the cover plate 2 is used for closing the opening, and the winding core 3 is installed in the housing 1.

Illustratively, as shown in fig. 1, the cover plate 2 is welded to the housing 1, and the cover plate 2 is located below the winding core 3 and can support the winding core 3.

According to the background technology, the cover plate of the conventional cylindrical battery is insufficient in supporting force on the winding core 3, so that the winding core 3 is laid down and deformed, and further, the pole pieces are misplaced, and the internal short circuit of the battery is seriously caused. Based on this, the utility model provides a brand new cover plate 2, which aims to improve the supporting force of the cover plate 2 on the winding core 3.

With continued reference to fig. 1 and with subsequent reference to fig. 2-4, wherein fig. 2 is a schematic perspective view of a cover plate of a cylindrical battery of the present utility model; FIG. 3 is a schematic top view of the cover plate of the cylindrical battery of the present utility model; fig. 4 is a schematic cross-sectional view of a cap plate of a cylindrical battery of the present utility model.

As shown in fig. 1 to 4, the cover plate 2 of the present utility model includes a cover body 21 and a support 22 provided on an inner surface of the cover body 21, the support 22 being for directly or indirectly supporting the winding core 3 of the battery, the inner surface of the cover body 21 being a surface of the cover body 21 adjacent to the winding core 3, and the upper surface of the cover body 21 being seen from fig. 1.

The cover plate 2 of the utility model supports the winding core 3 of the battery by arranging the supporting piece 22 on the inner surface of the cover body 21, thereby improving the supporting force of the cover plate 2 on the winding core 3 and preventing the winding core 3 from being laid down and deformed, thereby improving the safety of the battery.

It should be noted that, in practical applications, the person skilled in the art may make the support member 22 indirectly support the winding core 3 of the battery, as shown in fig. 1, a negative electrode current collecting disc 4 is disposed between the winding core 3 and the cover plate 2, a negative electrode ear is disposed at the bottom end of the winding core 3, the negative electrode ear is welded to the negative electrode current collecting disc 4, the negative electrode current collecting disc 4 is directly supported below the winding core 3, the cover plate 2 is located below the negative electrode current collecting disc 4, the support member 22 disposed on the cover plate 2 is supported at the bottom of the negative electrode current collecting disc 4, that is, indirectly support the winding core 3 of the battery, or make the support member 22 directly support the winding core 3 of the battery, specifically, the negative electrode current collecting disc 4 disposed between the cover plate 2 and the winding core 3 may be omitted, that is, and the support member 22 disposed on the cover plate 2 is directly supported at the bottom of the winding core 3, which is flexibly adjusted and changed without departing from the principle and scope of the present utility model.

In addition, it should be noted that, in the case where the negative electrode current collecting plate 4 is not provided, the negative electrode tab of the winding core 3 may be directly electrically connected to the cap plate 2.

It should be noted that the specific structural form of the support member 22 is not limited, for example, those skilled in the art may set the support member 22 as a bar-shaped support plate, or may set the support member 22 as a support frame, or may set the support member 22 as a support block, or the like, and such modifications and changes to the specific structural form of the support member 22 do not deviate from the principle and scope of the present utility model, and should be limited to the protection scope of the present utility model.

In addition, it should be noted that the specific connection form of the support member 22 and the cover body 21 is not limited, for example, those skilled in the art may set the support member 22 and the cover body 21 as a whole in practical application, or may fixedly connect the support member 22 and the cover body 21, for example, fixedly connect the support member 22 and the cover body 21 by welding or riveting, etc., and such adjustment and change of the specific connection form of the support member 22 and the cover body 21 do not deviate from the principle and scope of the present utility model, which should be limited in the scope of the present utility model.

Preferably, the present utility model rivets and fixes the support 22 to the cover body 21.

According to the cover plate 2 disclosed by the utility model, the supporting piece 22 and the cover body 21 are fixedly connected in a riveting manner, so that a welding process can be saved, and the production cost is further reduced.

Illustratively, a rivet groove is provided on the cover body 21, a rivet bump is provided on the support 22, and the rivet bump is inserted into the rivet groove to rivet-fix the support 22 with the cover body 21.

Preferably, as shown in fig. 1 to 4, the cover body 21 of the cover plate 2 of the present utility model includes a first body 211 and a second body 212, the first body 211 being disposed close to the winding core 3 and the second body 212 being disposed away from the winding core 3 in the axial direction, and the support 22 being disposed on the first body 211.

Illustratively, as shown in fig. 4, the top surface of the cover body 21 is an inner surface thereof (a surface of the cover body 21 close to the winding core 3), the bottom surface of the cover body 21 is an outer surface thereof (a surface of the cover body 21 remote from the winding core 3), the middle region of the cover body 21 is recessed downward, the recessed region is defined as a second body 212, the annular region located at the periphery of the recessed region is defined as a first body 211, that is, the first body 211 is annular and extends in the circumferential direction of the cover body 21, the second body 212 is located at the inner side of the first body 211, the support 22 is provided at the first body 211, and the second body 212 is recessed toward the outer surface of the cover body 21 to avoid contact with the support 22, that is, a gap is provided between the bottom surface of the support 22 and the second body 212.

It should be noted that, in practical applications, a specific value of the gap between the support 22 and the second body 212 may be flexibly set according to circumstances, for example, the gap may be set to 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, or 2.5mm, etc., which are not departing from the principle and scope of the present utility model, and such flexible adjustment and modification should be limited to the protection scope of the present utility model.

Of course, the gap between the support 22 and the second body 212 is preferably set to be not more than 2.0mm in order to avoid excessive occupation of the vertical space of the battery.

Preferably, as shown in fig. 4, the second body 212 of the cover plate 2 of the present utility model is provided with an explosion-proof structure on the side facing away from the support 22.

The explosion-proof structure is arranged on the second body 212, so that the situation that the explosion-proof structure is extruded by the supporting piece 22 to be opened in advance can be avoided, and the stability of the battery is improved.

As shown in fig. 4, an explosion-proof notch 216 (i.e. an explosion-proof structure) is formed on the outer surface of the second body 212 (the bottom surface of the second body 212 is seen in fig. 4) of the cover plate 2, the supporting member 22 is located right above the explosion-proof structure, the supporting member 22 is used for supporting the winding core 3, when the winding core 3 is pressed down, the supporting member 22 is firstly contacted, the explosion-proof structure below the supporting member 22 is not extruded, and the situation that the explosion-proof structure is opened in advance is avoided.

It should be noted that, in practical applications, a person skilled in the art may also set the explosion-proof structure on the side of the second body 212 facing the support 22, or set the explosion-proof structure on both the side of the second body 212 facing the support 22 and the side facing away from the support 22.

Preferably, as shown in fig. 2 to 4, the support 22 of the present utility model includes a base 221 and a plurality of support ribs 222, the plurality of support ribs 222 are spaced apart along the circumferential direction of the base 221, one end of the support rib 222 is fixedly connected or integrally provided with the base 221, and the other end of the support rib 222 is fixedly connected with the first body 211.

The cover plate 2 of the present utility model can reduce the weight and production cost of the cover plate 2 on the basis of ensuring sufficient supporting force by providing the supporting member 22 in the form of the base 221 plus the plurality of supporting ribs 222.

As shown in fig. 3, the base 221 of the support 22 according to the present utility model is a circular plate, the number of the support ribs 222 is four, the four support ribs 222 are uniformly distributed along the circumferential direction of the base 221, the angle between two adjacent support ribs 222 is exactly 90 degrees, wherein the inner end of each support rib 222 is integrally disposed with the base 221, the outer end of each support rib 222 is provided with a riveting point 2221, and the outer ends of the support ribs 222 are fixedly connected with the first body 211 of the cover body 21 by riveting.

It should be noted that, the shape of the base 221 is not limited to a circular plate, for example, those skilled in the art may also set the shape of the base 221 to be square in practical application, and such modifications and changes to the specific shape of the base 221 do not deviate from the principle and scope of the present utility model, and should be limited to the protection scope of the present utility model.

Of course, the present utility model preferably provides the base 221 as a circular plate.

It should be noted that the number of the supporting ribs 222 is not limited to four, for example, those skilled in the art may also set the number of the supporting ribs 222 to two, three or five in practical application, and such specific number of the supporting ribs 222 may be adjusted and changed without departing from the principle and scope of the present utility model, which is limited to the protection scope of the present utility model.

Of course, the present utility model preferably sets the number of the support ribs 222 to three or four.

Preferably, as shown in fig. 2 to 4, the cover body 21 further includes a boss 214 located inside the second body 212 in the circumferential direction and disposed toward a side close to the winding core 3, and the boss 214 is provided with a liquid injection hole 213.

Electrolyte can be injected into the case 1 of the battery through the injection hole 213.

As shown in fig. 2 to 4, the boss 214 is located on the inner surface of the second body 212 and protrudes toward the supporting member 22, the boss 214 is provided as a circular boss, the boss 214 is located at the middle position of the second body 212, the boss 214 protrudes upward in the vertical direction, the top surface of the boss 214 is not in contact with the supporting member 22, a gap is provided between the boss 214 and the bottom surface of the cover body 21 of the supporting member 22, the specific value of the gap is not limited, the present utility model can be flexibly set by those skilled in the art, and the liquid injection hole 213 is a circular hole and is located at the center position of the boss 214.

It should be noted that the shape of the boss 214 is not limited to the circular boss described above, for example, those skilled in the art may set the boss 214 as a square boss in practical application, or may set the boss 214 as a triangular boss, etc., and such modifications and changes to the specific shape of the boss 214 are not limited to the principle and scope of the present utility model.

Of course, the present utility model preferably provides the boss 214 as a circular boss.

It should be noted that the location of the boss 214 is not limited to the middle area of the second body 212, for example, those skilled in the art may also locate the boss 214 near the edge of the second body 212 in practical applications, and such flexible adjustment and modification are not limited to the principle and scope of the present utility model.

Of course, the boss 214 is preferably provided in the middle region of the second body 212, and this arrangement is advantageous in improving the liquid injection efficiency and the wettability of the battery.

In addition, it should be noted that the shape of the liquid injecting hole 213 is not limited to a circular hole, for example, those skilled in the art may set the liquid injecting hole 213 as a square hole in practical application, or may set the liquid injecting hole 213 as a polygonal hole, etc., and such modifications and changes to the specific shape of the liquid injecting hole 213 do not deviate from the principle and scope of the present utility model, and should be limited to the protection scope of the present utility model.

Of course, the present utility model preferably provides the liquid injection hole 213 as a circular hole for easy processing.

Preferably, as shown in fig. 4, on the side remote from the winding core 3, the cover body 21 is provided with a groove 215 at a position corresponding to the boss 214. Wherein the slot 215 is adapted to receive a sealing spike that seals the injection port 213.

The cover plate 2 of the present utility model can improve the connection stability between the sealing nail and the cover plate 2 and the sealing property to the liquid injection hole 213 by providing the sealing nail groove 215 for accommodating the sealing liquid injection hole 213 on the outer surface of the cover body 21.

Illustratively, as shown in fig. 4, a groove 215 is formed on the outer surface of a cap body 21, the groove 215 is recessed toward the inner surface of the cap body 21, a recess is formed in the middle area of the cap body 21 by the cap plate 2 of the present utility model, a boss 214 is formed on the inner surface of the cap body 21 while the groove 215 is formed on the outer surface of the cap body 21, a circular filling hole 213 is formed in the middle position of the boss 214, after the battery winding core 3 is mounted in the battery case 1, electrolyte is filled into the battery case 1 through the filling hole 213, after the electrolyte is filled, a sealing nail is mounted in the groove 215, the size of the groove 215 matches with the size of the sealing nail, and then the sealing nail is welded with the case 1, thereby sealing the filling hole 213, that is, the groove 215 is a positioning groove.

Preferably, as shown in fig. 2 to 4, the support 22 of the present utility model is provided with a through hole 2211 at a position corresponding to the liquid injection hole 213, the through hole 2211 penetrating the support 22 in the thickness direction of the support 22.

The cover plate 2 of the utility model is beneficial to improving the liquid injection efficiency and the overall infiltration performance by arranging the through holes 2211 on the supporting piece 22.

Illustratively, as shown in fig. 2 to 4, the boss 214 is located just below the base 221 of the support 22, the through hole 2211 is formed on the base 221, the through hole 2211 and the filling hole 213 are both circular holes and concentrically arranged, after the battery winding core 3 is put into the battery case 1, electrolyte is filled into the battery case 1 through the filling hole 213, the electrolyte filled from the filling hole 213 flows through the through hole 2211 to the battery winding core 3, after the electrolyte is filled, the sealing nail is mounted in the groove 215, the size of the groove 215 is matched with the size of the sealing nail, and then the sealing nail is welded with the case 1, thereby sealing the filling hole 213.

It should be noted that the shape of the through hole 2211 is not limited to a circular hole, for example, those skilled in the art may also set the through hole 2211 as a square hole in practical application, or may set the through hole 2211 as a polygonal hole, etc., and such adjustments and changes to the specific shape of the through hole 2211 do not deviate from the principle and scope of the present utility model, and should be limited to the protection scope of the present utility model.

Of course, the present utility model preferably provides the through hole 2211 as a circular hole for easy processing.

In addition, it should be noted that, in practical applications, the hole diameter of the through hole 2211 may be set to be larger than the hole diameter of the liquid injection hole 213, or the hole diameter of the through hole 2211 may be set to be smaller than the hole diameter of the liquid injection hole 213, or the hole diameter of the through hole 2211 may be set to be equal to the hole diameter of the liquid injection hole 213, which are not limited by the principle and scope of the present utility model.

Preferably, as shown in fig. 2 to 4, the aperture of the through hole 2211 is larger than the aperture of the liquid injection hole 213.

By making the aperture of the through hole 2211 larger than that of the liquid injection hole 213, the liquid injection efficiency is advantageously improved, thereby improving the production efficiency of the battery.

Illustratively, as shown in fig. 4, the aperture of the through hole 2211 is larger than the aperture of the liquid injection hole 213, but the aperture of the through hole 2211 is smaller than the outer diameter of the boss 214, in order to avoid the boss 214 contacting the support 22, and a gap is provided between the boss 214 and the bottom surface of the support 22, the present utility model is not limited to a specific numerical value of the gap, and a person skilled in the art can flexibly set in practical applications.

Of course, the aperture of the through hole 2211 on the support member 22 may be larger than the outer diameter of the boss 214, so that the boss 214 can be prevented from contacting the support member 22, and those skilled in the art can flexibly set the hole according to the specific situation.

Those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the present application and form different embodiments. For example, in the claims of the present application, any of the claimed embodiments may be used in any combination.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims (10)

1. The cover plate for the cylindrical battery is characterized by comprising a cover body and a supporting piece arranged on the cover body to support a winding core of the cylindrical battery, wherein the supporting piece is arranged on one side of the cover body, which faces the winding core.

2. The cover plate of claim 1, wherein the cover body comprises a first body and a second body, the first body is disposed near the winding core and the second body is disposed far from the winding core in an axial direction, and the supporting member is disposed on the first body.

3. The cover plate according to claim 2, wherein the second body is provided with an explosion-proof structure on a side facing the support; and/or the second body is provided with an explosion-proof structure at one side facing away from the supporting piece.

4. The cover sheet according to claim 2, wherein the cover body further includes a boss located inside the second body in a circumferential direction and provided toward a side close to the winding core, and a liquid injection hole is provided on the boss.

5. The cover sheet according to claim 4, wherein the cover body is provided with a groove at a position corresponding to the boss on a side remote from the winding core.

6. The cover plate according to claim 5, wherein the support member is provided with a through hole at a position corresponding to the liquid injection hole, the through hole penetrating the support member in a thickness direction of the support member.

7. The cover plate of claim 6, wherein the aperture of the through hole is larger than the aperture of the liquid injection hole.

8. The cover plate according to claim 2, wherein the supporting member comprises a base body and a plurality of supporting ribs, the supporting ribs are distributed at intervals along the circumferential direction of the base body, one end of each supporting rib is fixedly connected with or integrally arranged with the base body, and the other end of each supporting rib is fixedly connected with the first body.

9. The cover plate of any one of claims 1 to 8, wherein the support is riveted to the cover body.

10. A cylindrical battery comprising a cover plate according to any one of claims 1 to 9.