CN117884533A - Cover plate assembly forming process and cover plate - Google Patents
Cover plate assembly forming process and cover plate Download PDFInfo
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- CN117884533A CN117884533A CN202410296809.7A CN202410296809A CN117884533A CN 117884533 A CN117884533 A CN 117884533A CN 202410296809 A CN202410296809 A CN 202410296809A CN 117884533 A CN117884533 A CN 117884533A
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- 238000000034 method Methods 0.000 title claims abstract description 73
- 238000004080 punching Methods 0.000 claims description 65
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 10
- 238000003466 welding Methods 0.000 abstract description 4
- 239000012212 insulator Substances 0.000 description 27
- 238000010586 diagram Methods 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 238000005192 partition Methods 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
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Abstract
The invention relates to the technical field of batteries and discloses a cover plate assembly forming process and a cover plate. The pole comprises a bottom plate, a body part and an annular vertical wall, wherein the body part is arranged on the upper surface of the bottom plate, and the annular vertical wall is annularly arranged on the outer edge of the upper surface of the body part. According to the cover plate assembly forming process, the annular vertical wall is arranged on the body part of the pole, when the cover plate assembly forming is carried out, the pole penetrates through the lower insulating piece and the mounting hole on the cover plate body, then the upper insulating piece is sleeved on the body part from top to bottom, and then the annular vertical wall is punched to enable the annular vertical wall to be bent downwards and attached to the upper surface of the upper insulating piece, so that the pole is fixed on the cover plate body. The cover plate assembly forming process eliminates the pre-riveting process and the laser welding process of the riveting block and the polar column, so as to simplify the cover plate production process, improve the cover plate production efficiency, reduce the cover plate production cost and achieve the effects of cost reduction and synergy.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a cover plate assembly forming process and a cover plate.
Background
The battery cover plate comprises a cover plate body 1', a pole column 2', an upper plastic, a lower plastic, a sealing ring and other structures. As shown in FIG. 1, the fixing structure of the pole and the cover plate body is mostly a riveted structure, the rivet block 3' and the pole are connected with each other through a pre-riveting process, and then the secondary connection is performed through laser welding, so that the purpose of reducing the internal resistance is achieved. The existing riveting structure has more parts and complex assembly and molding processes, so that the cover plate has long production period, high production cost and low production efficiency.
Disclosure of Invention
In view of the above, the invention provides a cover plate assembly forming process and a cover plate, so as to solve the problems of complex cover plate assembly forming process, high production cost and low efficiency in the prior art.
In a first aspect, the invention provides a cover plate assembly forming process, wherein a cover plate comprises a cover plate body, a pole, an upper insulating piece and a lower insulating piece, and mounting holes are formed in the cover plate body, the upper insulating piece and the lower insulating piece; the pole comprises a bottom plate, a body part and an annular vertical wall, wherein the body part is arranged on the upper surface of the bottom plate, and the annular vertical wall is annularly arranged on the outer edge of the upper surface of the body part; the cover plate assembly forming process comprises the following steps:
The lower insulating piece is arranged on the lower surface of the cover plate body;
passing the body part through the mounting holes of the lower insulating piece and the cover plate body from bottom to top, positioning the annular standing wall on the upper side of the upper surface of the cover plate body, and abutting the bottom plate on the lower surface of the lower insulating piece;
Sleeving the upper insulating piece on the body part;
And stamping the annular standing wall by using a stamping tool so that the annular standing wall bends towards the upper surface of the upper insulating piece and is attached to the upper surface of the upper insulating piece.
The beneficial effects are that: according to the cover plate assembly forming process, the annular vertical wall is arranged on the body part of the pole, when the cover plate assembly forming is carried out, the pole penetrates through the lower insulating piece and the mounting hole on the cover plate body, then the upper insulating piece is sleeved on the body part from top to bottom, and then the annular vertical wall is punched to enable the annular vertical wall to be bent downwards and attached to the upper surface of the upper insulating piece, so that the pole is fixed on the cover plate body. The cover plate assembly forming process eliminates the pre-riveting process and the laser welding process of the riveting block and the polar column, so as to simplify the cover plate production process, improve the cover plate production efficiency, reduce the cover plate production cost and achieve the effects of cost reduction and synergy.
In an alternative embodiment, before stamping the annular standing wall, the method further comprises the steps of:
The cover plate is placed and positioned in the die, a punching hole is formed in the die, the annular vertical wall is arranged in the punching hole, and the punching tool downwards punches the annular vertical wall through the punching hole.
The beneficial effects are that: and the assembled cover plate is put into a die, and the cover plate is positioned through the die, so that each part of the cover plate is prevented from shifting in the stamping process, and the stamping effect and the accuracy of the positions of each part of the cover plate after the cover plate is formed are ensured.
In an alternative embodiment, the annular standing wall has a wall thickness d, and the height of the annular standing wall protruding from the upper surface of the body portion is h,0.5mm < d < 5mm,1mm < h < 5mm.
The beneficial effects are that: the wall thickness and the height of the annular vertical wall are moderate, the downward stamping bending is facilitated, and meanwhile, the wall thickness of the annular vertical wall can be prevented from being too thin to break after stamping, so that the annular vertical wall cannot be stably fixed on the cover plate body. The height of the annular vertical wall is moderate, so that the annular vertical wall can be lapped on the upper surface of the upper insulating part after being punched and bent, the upper insulating part can be fixed, and meanwhile, the annular vertical wall can be prevented from being excessively high so as to be inconvenient to punch and bend.
In an alternative embodiment, 1 mm.ltoreq.d.ltoreq.1.5 mm,1.5 mm.ltoreq.h.ltoreq.2.5 mm;
and/or, h is more than or equal to 1 and d is more than or equal to 10.
The beneficial effects are that: the wall thickness and the height of the annular vertical wall are moderate, the annular vertical wall is favorable for stamping and bending, and meanwhile, the integrity and the structural strength of the stamped annular vertical wall are ensured, so that the annular vertical wall is stably and firmly fixed on the cover plate body.
The thickness of the annular vertical wall is smaller than or equal to the height of the annular vertical wall, the annular vertical wall is conveniently punched and bent, the stamping efficiency of the annular vertical wall is improved, and therefore the assembly forming efficiency of the cover plate is improved.
In an alternative embodiment, when the annular vertical wall is stamped by using a stamping tool, the annular vertical wall is stamped by adopting at least two stamping procedures, wherein the angle between the stamping inclined surface of a first stamping tool used in a first stamping procedure and the peripheral wall of the first stamping tool is A,0 degrees < A <50 degrees, and the area of the outer contour of the bottom surface of the first stamping tool is smaller than the area of the area surrounded by the inner wall of the annular vertical wall; the first step of punching, namely punching the annular vertical wall down to incline towards the upper insulating piece;
The stamping end of the last stamping tool used in the last stamping process is a plane, and the area of the stamping end of the last stamping tool is larger than the area of the outer contour of the annular vertical wall after being horizontally flattened; the final stamping presses the annular standing wall flush with the upper surface of the body portion.
The beneficial effects are that: at least two stamping processes are adopted to stamp the annular vertical wall so as to gradually stamp the annular vertical wall to a horizontal state, and the annular vertical wall is prevented from being crushed or damaged due to overlarge single stamping force. The area of the stamping end of the last stamping tool is larger than the area of the outer contour of the annular vertical wall after the horizontal flattening, and the last stamping tool can completely cover the annular vertical wall so as to fully flatten all parts of the annular vertical wall.
In an alternative embodiment, the annular standing wall is punched by at least three punching steps, wherein the angle between the punching inclined surface of the middle punching tool used in the punching step between the first punching step and the last punching step and the peripheral wall of the middle punching tool is B, and A < B < 90 degrees.
The beneficial effects are that: the annular vertical wall is stamped by adopting at least three stamping procedures, and B is more than A, so that the inclination angle of the annular vertical wall is gradually increased by stamping, the annular vertical wall is prevented from being broken or damaged due to overlarge single stamping force until the annular vertical wall is stamped to be in a horizontal state by adopting a last stamping tool.
In an alternative embodiment, a=15°, and/or a+15° b+.a+30°.
In an alternative embodiment, the first stamping tool is at a distance of 0mm to 1mm from the upper surface of the body portion when stamping is stopped; and/or the last press tool stops pressing when contacting the upper surface of the body portion.
The beneficial effects are that: the upper surface of the annular vertical wall or the body part is prevented from being damaged by transitional stamping.
In a second aspect, the invention further provides a cover plate manufactured and formed by the cover plate assembly forming process according to any one of the above, and the cover plate comprises a cover plate body, a pole, an upper insulating part and a lower insulating part.
In an alternative embodiment, the peripheral wall of the annular standing wall is flush with the peripheral wall of the body portion;
and/or the annular standing wall is provided with a separation groove which separates the annular standing wall into at least two sections;
And/or the shape of the body part comprises a cylindrical shape, a prismatic shape or an elliptic cylindrical shape, and the shape of the annular standing wall is the same as the shape of the cross section of the body part.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a cover plate described in the background of the invention;
FIG. 2 is a schematic view of a pole in a cover plate according to an embodiment of the invention;
FIG. 3 is a cross-sectional view of a post in a cover plate according to an embodiment of the present invention;
FIG. 4 is a schematic view of a post in a cover plate according to another embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating assembly of a lower insulator and a cover body in a cover assembly molding process according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an assembled lower insulator and a cover body in a cover assembly molding process according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of the assembly of a seal and a post in a cover plate assembly molding process according to an embodiment of the invention;
FIG. 8 is a schematic diagram of an assembled seal and post in a cover plate assembly forming process according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of the assembly of the seal, pole, and cover body and lower insulator in a cover assembly molding process according to an embodiment of the present invention;
FIG. 10 is a schematic view of an assembled seal, post, cover body and lower insulator in a cover assembly process according to an embodiment of the present invention;
FIG. 11 is a schematic diagram illustrating assembly of an upper insulator and a pole in a cover plate assembly molding process according to an embodiment of the present invention;
FIG. 12 is a schematic view of an assembled upper insulator and post in a cover plate assembly forming process according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of a first stamping process in a cover plate assembly forming process according to an embodiment of the present invention;
FIG. 14 is a schematic view of a first stamping step in a cover plate assembly forming process according to an embodiment of the present invention;
FIG. 15 is a schematic diagram of a last stamping process in a cover plate assembly forming process according to an embodiment of the invention;
FIG. 16 is a schematic diagram of a last stamping process in a cover plate assembly forming process according to an embodiment of the invention;
FIG. 17 is an exploded view of a cover plate and mold according to an embodiment of the present invention;
FIG. 18 is a schematic view of a first press tool according to an embodiment of the invention;
FIG. 19 is a schematic view of an intermediate stamping tool according to an embodiment of the present invention;
FIG. 20 is a schematic view of a final stamping tool and post according to an embodiment of the present invention;
FIG. 21 is a schematic diagram of a final stamping tool and a post according to an embodiment of the present invention.
Reference numerals illustrate:
1', a cover plate body; 2', a pole; 3', riveting blocks; 1. a cover plate body; 2.a pole; 201. a bottom plate; 202. a body portion; 203. an annular standing wall; 2031. a partition groove; 3. an upper insulating member; 4. a lower insulating member; 501. an upper press plate; 5011. punching a hole; 502. a lower template; 6. a first stamping tool; 7. an intermediate stamping tool; 8. a last press tool; 9. and a seal.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
When the cover plate is provided on the top end opening of the housing, the upper side of the cover plate is referred to as an upper side, and the lower side of the cover plate is referred to as a lower side.
An embodiment of the present invention is described below with reference to fig. 1 to 21.
According to an embodiment of the present invention, in one aspect, there is provided a cover plate assembly molding process, wherein the cover plate includes a cover plate body 1, a pole 2, an upper insulator 3 and a lower insulator 4, wherein mounting holes are formed in the cover plate body 1, the upper insulator 3 and the lower insulator 4; the pole 2 comprises a bottom plate 201, a body part 202 and an annular standing wall 203, wherein the body part 202 is arranged on the upper surface of the bottom plate 201, and the annular standing wall 203 is arranged on the outer edge of the upper surface of the body part 202 in a surrounding manner; as shown in fig. 5 to 17, the cover plate assembly molding process includes the steps of:
A lower insulator 4 is provided on the lower surface of the cover plate body 1;
The body 202 passes through the mounting holes of the lower insulator 4 and the cover plate body 1 from bottom to top, the annular standing wall 203 is positioned on the upper side of the upper surface of the cover plate body 1, and the bottom plate 201 is abutted against the lower surface of the lower insulator 4;
the upper insulator 3 is sleeved on the body part 202;
the annular standing wall 203 is punched using a punching tool so that the annular standing wall 203 is bent toward the upper surface of the upper insulator 3 and is fitted to the upper surface of the upper insulator 3.
In the cover plate assembly forming process of the invention, the annular vertical wall 203 is arranged on the body part 202 of the pole 2, when the cover plate assembly forming is carried out, the pole 2 passes through the lower insulating member 4 and the mounting hole on the cover plate body 1, then the upper insulating member 3 is sleeved on the body part 202 from top to bottom, and then the annular vertical wall 203 is punched so that the annular vertical wall 203 is downwards bent and attached to the upper surface of the upper insulating member 3, so that the pole 2 is fixed on the cover plate body 1. The cover plate assembly forming process eliminates the pre-riveting process and the laser welding process of the riveting block and the pole column 2, so as to simplify the cover plate production process, improve the cover plate production efficiency, reduce the cover plate production cost and achieve the effects of cost reduction and synergy.
Optionally, in one embodiment, before stamping the annular standing wall 203, the steps of: the cover plate is placed and positioned in a die, a punching hole 5011 is formed in the die, the annular vertical wall 203 is arranged in the punching hole 5011, and the punching tool punches the annular vertical wall 203 downwards through the punching hole 5011. And the assembled cover plate is put into a die, and the cover plate is positioned through the die, so that each part of the cover plate is prevented from shifting in the stamping process, and the stamping effect and the accuracy of the positions of each part of the cover plate after the cover plate is formed are ensured.
As shown in fig. 13 to 17, the mold includes an upper platen 501 and a lower platen 502, a punching hole 5011 is provided on the upper platen 501, a groove for accommodating a cover plate is provided on the lower platen 502, a positioning column is provided on the lower platen 502, a positioning hole is provided at a corresponding position on the upper platen, the cover plate is placed in the groove of the lower platen 502, the lower platen is crimped over the cover plate, and the positioning column is inserted into the positioning hole to clamp the cover plate between the upper platen 501 and the lower platen 502.
As shown in FIG. 3, in one embodiment, the annular standing wall 203 has a wall thickness d, and the height of the annular standing wall 203 protruding from the upper surface of the body portion 202 is h,0.5 mm.ltoreq.d.ltoreq.5 mm,1 mm.ltoreq.h.ltoreq.5 mm. The wall thickness and the height of the annular standing wall 203 are moderate, so that the downward stamping and bending are facilitated, and meanwhile, the wall thickness of the annular standing wall 203 can be prevented from being too thin to break after stamping, so that the annular standing wall 203 cannot be stably fixed on the cover plate body 1. The height of the annular vertical wall 203 is moderate, so that the annular vertical wall 203 can be lapped on the upper surface of the upper insulating part 3 after being punched and bent, so that the upper insulating part 3 is fixed, and meanwhile, the annular vertical wall 203 can be prevented from being excessively high so as to be inconvenient to punch and bend.
The wall thickness of the annular standing wall was selected and the results after punching the annular standing wall are shown in Table 1.
TABLE 1
As can be seen from Table 1, when the thickness d of the annular standing wall is less than 0.5mm, the annular standing wall is too thin, so that the phenomenon of edge lifting and cracking of the annular standing wall after stamping is caused, the annular standing wall is unstable in structure, and the annular standing wall cannot be stably maintained on the cover plate body. When d is more than or equal to 0.5mm and less than or equal to 5mm, the annular vertical wall is moderate in thickness, and the structural stability of the stamped annular vertical wall is good, so that the stamped annular vertical wall can be stably kept on the cover plate body; meanwhile, the thickness of the annular vertical wall is not too thick, so that the annular vertical wall is convenient to punch, and the annular vertical wall is stuck on the upper surface of the upper insulating piece after flanging. When d is more than 5mm, the annular vertical wall cannot be stamped and turned up due to the fact that the thickness of the annular vertical wall is thicker, and the annular vertical wall is large in material consumption and high in cost.
When d < 1mm, the structural stability of the annular standing wall after stamping is poor, and the matching effect with the upper insulating member is poor, so that preferably, in one embodiment, d and h satisfy that d is less than or equal to 1mm and less than or equal to 1.5mm, h is less than or equal to 1.5mm and less than or equal to 2.5mm, the wall thickness and the height of the annular standing wall 203 are moderate, the annular standing wall 203 is favorably stamped and bent, and meanwhile, the integrity and the structural strength of the annular standing wall 203 after stamping are ensured, so that the annular standing wall 203 is stably and firmly fixed on the cover plate body 1.
If the wall thickness of the annular standing wall 203 is greater than the height thereof, the annular standing wall 203 is difficult to be punched and bent, so that h is more than or equal to 1 and d is less than or equal to 10, namely the thickness of the annular standing wall 203 is less than or equal to the height thereof, the annular standing wall 203 is conveniently punched and bent, and the punching efficiency of the annular standing wall 203 is improved, thereby improving the assembly forming efficiency of the cover plate.
Alternatively, in one embodiment, when the annular standing wall 203 is punched by using a punching tool, the annular standing wall 203 is punched by adopting at least two punching processes, wherein the angle between the punching inclined surface of the first punching tool 6 and the outer peripheral wall of the first punching tool 6 used in the first punching process is a,0 ° < a <50 °, and the area of the outer contour of the bottom surface of the first punching tool 6 is smaller than the area of the area enclosed by the inner wall of the annular standing wall 203; the first step of punching presses down the annular standing wall 203 to incline toward the upper insulator 3; the stamping end of the last stamping tool 8 used in the last stamping process is a plane, and the area of the stamping end of the last stamping tool 8 is larger than the area of the outer contour of the annular vertical wall 203 after being horizontally flattened; the final stamping presses the annular upstanding wall 203 flush with the upper surface of the body portion 202.
At least two stamping processes are adopted to stamp the annular vertical wall 203 so as to gradually stamp the annular vertical wall 203 to a horizontal state, and the annular vertical wall 203 is prevented from being crushed or damaged due to overlarge single stamping force. As shown in fig. 18, the area of the outer contour of the bottom surface of the first press tool 6 is smaller than the area of the area surrounded by the inner wall of the annular standing wall 203, and when pressing, the bottom surface of the first press tool 6 protrudes into the annular standing wall 203, and the pressing inclined surface of the first press tool 6 presses the annular standing wall 203 outward so that the annular standing wall 203 is inclined toward the upper insulator 3. The annular standing wall 203 is punched to be horizontal by the last punching tool 8. The area of the stamping end of the last stamping tool 8 is larger than the area of the outer contour of the annular standing wall 203 after being flattened horizontally, namely, when the annular standing wall 203 is bent to be in a horizontal state, the last stamping tool 8 can completely cover the annular standing wall 203 so as to fully flatten all parts of the annular standing wall 203.
Alternatively, in one embodiment, at least three stamping steps are used to stamp the annular upstanding wall, as shown in FIG. 19, with the angle between the stamping inclined surface of the intermediate stamping tool and the peripheral wall of the intermediate stamping tool used in the stamping step between the first and last stamping steps being B, A < B < 90. B is larger than A, so that the inclination angle of the annular vertical wall 203 is gradually increased in the stamping process until the annular vertical wall 203 is stamped to be in a horizontal state, and the stability of the structure of the annular vertical wall 203 after flanging is improved.
Alternatively, in one embodiment, a=15°, the annular standing wall 203 is punched to the outwardly inclined state by the first-step punching, that is, the inclined angle of the annular standing wall 203 may be increased by the intermediate punching tool 7, or the annular standing wall 203 may be directly punched to the horizontal state by the last-step punching tool 8, so that the punching efficiency may be improved.
Optionally, a+15° is equal to or more than B is equal to or less than a+30°, the angle of downward inclination of the stamping inclined surface of the intermediate stamping tool 7 is 15 ° to 30 ° larger than the angle of downward inclination of the stamping inclined surface of the first stamping tool 6, the increasing value of the angle of the stamping inclined surface of the intermediate stamping tool 7 is moderate, the inclination angle of the annular standing wall can be ensured to be gradually increased in the stamping process, the stamping efficiency can be ensured, the forming efficiency of the cover plate is further improved, and the annular standing wall is prevented from being crushed due to the excessively large angle of the stamping inclined surface of the intermediate stamping tool 7; while preventing the punching efficiency from being affected by too small an angle of the punching inclined surface of the intermediate punching tool 7. Optionally, b=70°, to press-bend the annular standing wall 203 further downward after the first step of pressing.
The test results between the different values of A, B and the punching effect are shown in Table 2.
TABLE 2
As can be seen from table 2, when the angle a of the stamping inclined surface of the first stamping tool is too small, the stamping tool cannot effectively stamp the annular standing wall, and the annular standing wall cannot be turned down. When the angle A is more than 0 and less than or equal to 50 degrees, the stamping is normal, and the annular vertical wall can be normally turned downwards; when A is more than 50 degrees, the stamping tool can adhere to the pole, the stamping beat and the quality of the post after stamping are affected, and the top surface of the post after stamping is uneven and even cracks are generated.
As shown in fig. 14 and 16, the first press tool 6 is at a distance of 0mm to 1mm from the upper surface of the body portion 202 when press-stopping; and/or the last press tool 8 stops pressing when contacting the upper surface of the body portion 202 to avoid the transitional pressing damaging the annular standing wall 203 or the upper surface of the body portion 202.
Preferably, the first punching tool 6 is set to a distance of 0mm from the upper surface of the body portion 202 when punching is stopped, and the punching effect can be ensured while avoiding damage to the annular standing wall 203 by the transitional punching, facilitating the punching inclined surface to sufficiently press the annular standing wall 203 so that the annular standing wall 203 is sufficiently inclined and bent toward the upper insulator 3 side.
Alternatively, in other embodiments, as shown in fig. 13 to 16, the annular standing wall 203 may be punched by a two-step punching process, and the punching step may be simplified while ensuring the punching effect, and the cover plate assembly forming effect may be improved. The first step is to press the annular standing wall 203 to an outwardly inclined state using the first press tool 6, and the second step is to press the annular standing wall 203 to be flush with the upper surface of the body portion 202 using the last press tool 8.
The stamping tool is made of pm23 alloy tool steel, and the stamping surface of the stamping tool is subjected to mirror polishing treatment so as to ensure the smoothness of the top surface of the post 2 after stamping and the stamping surface of the stamping tool.
Alternatively, in one embodiment, as shown in fig. 2 to 4 and 7 to 17, the body portion 202 of the pole 2 is cylindrical, the annular standing wall 203 is disposed at the outer edge of the top surface of the body portion 202, and the outer peripheral wall of the annular standing wall 203 is flush with the outer peripheral wall of the body portion 202, the area of the body portion 202 is smaller than the bottom plate 201, the body portion 202 is located inside the edge of the bottom plate 201, and the body portion 202 is disposed in the middle area of the bottom plate 201. The press tools of the respective press steps are also cylindrical.
As shown in fig. 18, the diameter of the bottom surface of the first press tool 6 is a, the inner diameter of the annular standing wall 203 is b, a < b, so that the bottom surface of the first press tool 6 can be extended into the inner side of the annular standing wall 203, and the press inclined surface can be pressed outward against the annular standing wall 203.
As shown in fig. 21, the bottom surface of the last press tool 8 has a diameter e, and the annular standing wall 203 has a diameter f in a horizontal state, e > f, so that the last press tool 8 can completely cover the annular standing wall 203 and flatten the annular standing wall 203.
In other embodiments, the body 202 of the pole 2 may also be prismatic, elliptical, or the like, and the cross-section of the body 202 may also be racetrack with a rectangular middle and semi-circular sides. The shape of the annular standing wall 203 is matched with the shape of the body part 202, namely when the body part 202 is cylindrical, the annular standing wall 203 is in a circular ring shape; when the body 202 is a quadrangular prism, the annular standing wall 203 is rectangular and annular. The shape of the stamping tool is adapted to the shape of the annular standing wall 203, for example, the annular standing wall 203 is rectangular and annular, and the stamping tool has a quadrangular prism shape.
As shown in fig. 7 and 8, the cover plate further comprises a sealing element 9, and before the body part 202 passes through the mounting holes of the lower insulating element 4 and the cover plate body 1 from bottom to top, the sealing element 9 is sleeved on the body part 202 from top to bottom, and the sealing element 9 plays a role in sealing between the cover plate body 1 and the pole 2 to prevent electrolyte leakage. Optionally, the seal 9 is a sealing ring.
The post 2 of the cap plate includes a positive post and a negative post, which are identical in structure, and each includes a bottom plate 201, a body portion 202, and an annular standing wall 203. The cover plate is provided with two mounting holes, and when the annular vertical wall 203 is stamped, the annular vertical wall 203 of the positive pole column and the negative pole column can be synchronously stamped through two stamping tools, so that the assembly forming efficiency of the cover plate is improved.
Optionally, the upper insulator 3 comprises an upper plastic, the lower insulator 4 comprises a lower plastic, and the cover body 1 comprises a photo-aluminum sheet.
As shown in fig. 5 to 16, the cover plate assembly molding process is as follows:
positioning lower plastic on the lower surface of the aluminum sheet;
Sleeving the sealing ring on the body part 202 of the positive pole and the negative pole;
the positive pole and the negative pole penetrate through the mounting holes of the lower plastic and the aluminum sheet from bottom to top, the annular vertical wall 203 is positioned on the upper side of the upper surface of the aluminum sheet, and the bottom plate 201 is abutted against the lower surface of the lower plastic;
The upper plastic is sleeved on the body 202 of the positive pole and the negative pole;
placing the cover plate into a lower template 502, and crimping an upper pressing plate 501 on the upper part of the cover plate;
Stamping the annular standing walls 203 of the positive pole and the negative pole by using a first stamping tool 6 so that the annular standing walls 203 are obliquely bent towards the upper plastic;
the annular standing walls 203 of the positive electrode post and the negative electrode post are punched by using a last punching tool 8, and the annular standing walls 203 are bent and attached to the upper surface of the upper plastic.
According to an embodiment of the present invention, on the other hand, there is also provided a cover plate manufactured and formed by the above-mentioned cover plate assembly forming process, wherein the cover plate includes a cover plate body 1, a pole 2, an upper insulating member 3 and a lower insulating member 4.
The cover plate body 1, the upper insulating piece 3 and the lower insulating piece 4 are provided with mounting holes; the pole 2 comprises a bottom plate 201, a body part 202 and an annular standing wall 203, wherein the body part 202 is arranged on the upper surface of the bottom plate 201, and the annular standing wall 203 is arranged on the outer edge of the upper surface of the body part 202 in a surrounding manner; the lower insulator 4 is arranged on the lower surface of the cover plate body 1, the upper insulator 3 is arranged on the upper surface of the cover plate body 1, the pole 2 is arranged in the mounting holes of the lower insulator 4, the cover plate body 1 and the upper insulator 3 in a penetrating mode from bottom to top, the bottom plate 201 is abutted to the lower surface of the lower insulator 4, and the annular vertical wall 203 is in pressure connection with the upper surface of the upper insulator 3. The cover plate is directly bent downwards through the annular vertical wall 203 to be attached to the upper surface of the upper insulating part 3, so that the pole 2 and the upper insulating part 3 are fixed on the cover plate body 1, the pole 2 is simple in fixing structure, and the cover plate is convenient and quick to form.
As shown in fig. 2 to 4, before the annular standing wall 203 is punched, the outer peripheral wall of the annular standing wall 203 is flush with the outer peripheral wall of the body portion 202, and after the annular standing wall 203 is bent, the upper surface of the annular standing wall 203 is flush with the upper surface of the body portion 202. So that the stamping tool stops stamping when it contacts the upper surface of the body portion 202, the annular upstanding wall 203 can be flattened while preventing over-stamping from damaging the annular upstanding wall 203 or the body portion 202.
As shown in fig. 4, in one embodiment, the annular standing wall 203 is provided with a partition groove 2031, the partition groove 2031 partitions the annular standing wall 203 into at least two sections, and the partition groove 2031 facilitates rapid punching of the annular standing wall 203 by a punching tool. The partition groove 2031 on the annular standing wall 203 may be provided in one, two, three, or the like.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (9)
1. The cover plate assembly forming process is characterized in that the cover plate comprises a cover plate body, a pole, an upper insulating piece and a lower insulating piece, wherein mounting holes are formed in the cover plate body, the upper insulating piece and the lower insulating piece; the pole comprises a bottom plate, a body part and an annular vertical wall, wherein the body part is arranged on the upper surface of the bottom plate, and the annular vertical wall is annularly arranged on the outer edge of the upper surface of the body part; the wall thickness of the annular standing wall is d, the height of the annular standing wall protruding out of the upper surface of the body part is h, d is more than or equal to 0.5mm and less than or equal to 5mm, and h is more than or equal to 1mm and less than or equal to 5mm; the cover plate assembly forming process comprises the following steps:
The lower insulating piece is arranged on the lower surface of the cover plate body;
passing the body part through the mounting holes of the lower insulating piece and the cover plate body from bottom to top, positioning the annular standing wall on the upper side of the upper surface of the cover plate body, and abutting the bottom plate on the lower surface of the lower insulating piece;
Sleeving the upper insulating piece on the body part;
And stamping the annular standing wall by using a stamping tool so that the annular standing wall bends towards the upper surface of the upper insulating piece and is attached to the upper surface of the upper insulating piece.
2. The cover plate assembly forming process of claim 1, further comprising the steps of, prior to stamping the annular upstanding wall:
The cover plate is placed and positioned in the die, a punching hole is formed in the die, the annular vertical wall is arranged in the punching hole, and the punching tool downwards punches the annular vertical wall through the punching hole.
3. The cover plate assembly forming process according to claim 1 or 2, wherein d is 1mm or less and 1.5mm or less and h is 1.5mm or less and 2.5mm or less;
and/or, h is more than or equal to 1 and d is more than or equal to 10.
4. The cover plate assembly molding process according to claim 1 or 2, wherein when the annular standing wall is stamped by using a stamping tool, the annular standing wall is stamped by adopting at least two stamping processes, wherein an angle between a stamping inclined surface of a first stamping tool used in a first stamping process and an outer peripheral wall of the first stamping tool is a,0 ° < a is less than or equal to 50 °, and an area of an outer contour of a bottom surface of the first stamping tool is smaller than an area of an inner wall enclosing area of the annular standing wall; the first step of punching, namely punching the annular vertical wall down to incline towards the upper insulating piece;
the stamping end of the last stamping tool used in the last stamping process is a plane, and the area of the stamping end of the last stamping tool is larger than or equal to the area of the outer contour of the annular vertical wall after being horizontally flattened; and/or, the final step of stamping presses the annular standing wall to be flush with the upper surface of the body part.
5. The cover plate assembling and molding process according to claim 4, wherein the annular standing wall is punched by at least three punching processes, and an angle between a punching inclined surface of an intermediate punching tool used in a punching process between a first punching process and a last punching process and an outer peripheral wall of the intermediate punching tool is B, a < B < 90 °.
6. The cover plate assembly forming process of claim 5, wherein a = 15 °; and/or, A+15° is greater than or equal to B and is greater than or equal to A+30°.
7. The cover plate assembly forming process according to claim 4, wherein a distance from an upper surface of the body portion when the first punching tool stops punching is 0mm to 1mm; and/or the last press tool stops pressing when contacting the upper surface of the body portion.
8. A cover plate manufactured and formed by the cover plate assembly forming process according to any one of claims 1 to 7, wherein the cover plate comprises a cover plate body, a pole, an upper insulating member and a lower insulating member.
9. The cover plate of claim 8, wherein prior to stamping, the peripheral wall of the annular upstanding wall is flush with the peripheral wall of the body portion;
and/or the annular standing wall is provided with a separation groove which separates the annular standing wall into at least two sections;
And/or the shape of the body part comprises a cylindrical shape, a prismatic shape or an elliptic cylindrical shape, and the shape of the annular standing wall is the same as the shape of the cross section of the body part.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410296809.7A CN117884533A (en) | 2024-03-15 | 2024-03-15 | Cover plate assembly forming process and cover plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410296809.7A CN117884533A (en) | 2024-03-15 | 2024-03-15 | Cover plate assembly forming process and cover plate |
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| CN202410296809.7A Pending CN117884533A (en) | 2024-03-15 | 2024-03-15 | Cover plate assembly forming process and cover plate |
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