CN213340659U - Secondary battery cover plate and secondary battery - Google Patents
Secondary battery cover plate and secondary battery Download PDFInfo
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- CN213340659U CN213340659U CN202022327563.5U CN202022327563U CN213340659U CN 213340659 U CN213340659 U CN 213340659U CN 202022327563 U CN202022327563 U CN 202022327563U CN 213340659 U CN213340659 U CN 213340659U
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- utmost point
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- secondary battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
A secondary battery cover plate and a secondary battery, the secondary battery cover plate includes a top cover plate, a first electrode assembly and a second electrode assembly: the top cover plate is provided with a first through hole and a second through hole, and the first electrode assembly and the second electrode assembly are respectively connected with the first through hole and the second through hole; first electrode subassembly and second electrode subassembly include utmost point post, plastic spare, sealing washer and welding ring respectively, and wherein, utmost point post includes utmost point cap and utmost point post body, and the one end of utmost point cylinder is located to the utmost point cap, and the other end of utmost point cylinder is equipped with the recess, and the top of utmost point cylinder is located to the sealing washer cover, and the bottom of utmost point cylinder is located to the welding ring cover, and the outside of sealing washer and utmost point cap is located to the plastic spare cover, and the top of top-hat piece is all located to utmost point cap and plastic spare. The design of the groove at one end of the pole body can effectively reduce the weight of the pole, and meanwhile, the first electrode assembly and the second electrode assembly do not comprise the riveting block, so the structural design of the first electrode assembly and the second electrode assembly can effectively reduce the weight of the secondary battery.
Description
Technical Field
The utility model belongs to the power battery field, more specifically relates to a secondary battery apron and secondary battery.
Background
At present, the lithium ion power battery is widely applied to the fields of computers, mobile phones and the like due to the advantages of high energy density, high power density, multiple recycling times, long storage time and the like, has a wide application prospect in electric vehicles such as electric bicycles, electric automobiles and the like and energy storage facilities along with the maturity of manufacturing technology, and can effectively solve global problems such as environmental pollution, energy crisis and the like due to the wide application of the power battery.
In the prior art, the electrode assembly generally comprises a pole, a sealing ring, a welding ring and a riveting block which are connected in sequence, the electrode assembly is inserted into the mounting hole of the top cover plate, and the lower surface of the top cover plate is fixed through the riveting block, and the solid structure of the pole in the electrode assembly and the use of the riveting block can cause the increase of the whole weight of the secondary battery.
Accordingly, it is desirable to provide a secondary battery cap plate that can effectively reduce the weight of a secondary battery by optimizing the structure of an electrode assembly.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a secondary battery apron to solve the problem that leads to the whole weight increase of secondary battery because the solid construction of utmost point post and the use of riveting piece in the electrode subassembly.
In order to achieve the above object, the present invention provides a secondary battery cover plate, including a top cover plate, a first electrode assembly and a second electrode assembly:
the top cover plate is provided with a first through hole and a second through hole, and the first electrode assembly and the second electrode assembly are respectively connected with the first through hole and the second through hole;
first electrode subassembly with second electrode subassembly includes utmost point post, plastic part, sealing washer and welding ring respectively, wherein, utmost point post includes utmost point cap and utmost point post body, utmost point cap is located the one end of utmost point post body, the other end of utmost point post body is equipped with the recess, the sealing washer cover is located the top of utmost point post body, the welding ring cover is located the bottom of utmost point post body, plastic part cover is located the sealing washer with the outside of utmost point cap, utmost point cap with the plastic part is all located the top of top sheet.
Optionally, the top cover further comprises an insulating plastic sheet, the insulating plastic sheet is arranged on the lower surface of the top cover plate, and a third through hole and a fourth through hole which correspond to the first through hole and the second through hole respectively are formed in the insulating plastic sheet.
Optionally, the pole cap is a cuboid, the length and width of the pole cap are both greater than the diameter of the pole cylinder, and the diameter of the pole cylinder is adapted to the aperture of the first through hole and the aperture of the second through hole, so that the pole cylinder is arranged in the first through hole and the second through hole in a penetrating manner; the pole body penetrates through the third through hole and the fourth through hole and is welded with the welding ring pressed below the insulating plastic sheet;
the groove of the pole cylinder is circular, and the ratio of the depth of the groove to the height of the pole cylinder ranges from 1/5 to 1/3.
Optionally, the plastic part comprises four side walls connected in sequence, and the four side walls are connected to the outer side of the pole cap;
and a fifth through hole which is matched with the diameter of the pole cylinder is formed in the bottom of the plastic part, so that the pole cylinder can be conveniently arranged in the fifth through hole in a penetrating manner.
Optionally, the sealing ring includes an annular extension portion and an annular flange provided at one end of the annular extension portion, the annular extension portion is inserted between the pole cylinder and the hole walls of the first through hole and the second through hole, and the annular flange is pressed between the top cover plate and the pole cap.
Optionally, the pole cap and the pole cylinder are connected by a welding process.
Optionally, the material of the weld ring is aluminum.
Optionally, the hole walls of the first through hole and the second through hole are provided with annular convex hull structures, and the convex hull structures are used for enhancing the structural strength of the top cover plate.
Optionally, the top cover sheet is further provided with a liquid injection hole and an explosion-proof through hole, and an explosion-proof valve is arranged in the explosion-proof through hole.
A secondary battery comprises the secondary battery cover plate.
The utility model discloses a have beneficial effect to lie in:
the first electrode assembly and the second electrode assembly respectively comprise a pole, a plastic part, a sealing ring and a welding ring, wherein the pole comprises a pole cap and a pole body, the pole cap is arranged at one end of the pole cylinder body, the other end of the pole cylinder body is provided with a groove, the sealing ring is sleeved at the top of the pole cylinder body, the welding ring is sleeved at the bottom of the pole cylinder body, and the pole cap and the plastic part are arranged above the top cover plate; the design of the groove at one end of the pole body can effectively reduce the weight of the pole, and meanwhile, the first electrode assembly and the second electrode assembly do not comprise the riveting block, so that the structural design of the first electrode assembly and the second electrode assembly can effectively reduce the weight of the secondary battery, and the problem that the whole weight of the secondary battery is increased due to the solid structure of the pole in the electrode assembly and the use of the riveting block in the prior art is effectively solved.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 shows a schematic structural view of a secondary battery cover plate according to an embodiment of the present invention.
Fig. 2 shows an exploded view of the structure of a secondary battery cover plate according to an embodiment of the present invention.
Fig. 3 shows a cross-sectional view of the first/second electrode assembly of the secondary battery cap plate according to one embodiment of the present invention.
Fig. 4 shows a schematic structural diagram of a post of a secondary battery cover plate according to an embodiment of the present invention.
Fig. 5 shows a schematic structural view of a secondary battery according to an embodiment of the present invention.
Description of the reference numerals
1. A top cover sheet; 11. an explosion-proof through hole; 12. a liquid injection hole; 13. a first through hole; 14. a second through hole; 2. a pole column; 21. a pole cap; 22. a pole body; 23. a groove; 3. an explosion-proof valve; 4. a plastic part; 41. a fifth through hole; 5. a seal ring; 6. welding a ring; 7. an insulating plastic sheet; 71. a third through hole; 72. and a fourth via.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
According to the utility model discloses a secondary battery apron, including top cover plate, first electrode subassembly and second electrode subassembly:
the top cover plate is provided with a first through hole and a second through hole, and the first electrode assembly and the second electrode assembly are respectively connected with the first through hole and the second through hole;
first electrode subassembly and second electrode subassembly include utmost point post, plastic spare, sealing washer and welding ring respectively, and wherein, utmost point post includes utmost point cap and utmost point post body, and the one end of utmost point cylinder is located to the utmost point cap, and the other end of utmost point cylinder is equipped with the recess, and the top of utmost point cylinder is located to the sealing washer cover, and the bottom of utmost point cylinder is located to the welding ring cover, and the outside of sealing washer and utmost point cap is located to the plastic spare cover, and the top of top-hat piece is all located to utmost point cap and plastic spare.
The first electrode assembly and the second electrode assembly respectively comprise a pole, a plastic part, a sealing ring and a welding ring, wherein the pole comprises a pole cap and a pole body, the pole cap is arranged at one end of the pole cylinder body, the other end of the pole cylinder body is provided with a groove, the sealing ring is sleeved at the top of the pole cylinder body, the welding ring is sleeved at the bottom of the pole cylinder body, and the pole cap and the plastic part are arranged above the top cover plate; the design of the groove at one end of the pole body can effectively reduce the weight of the pole, and meanwhile, the first electrode assembly and the second electrode assembly do not comprise the riveting block, so the structural design of the first electrode assembly and the second electrode assembly can effectively reduce the weight of the secondary battery.
In one example, the device further comprises an insulating plastic sheet, the insulating plastic sheet is arranged on the lower surface of the top cover plate, and a third through hole and a fourth through hole which correspond to the first through hole and the second through hole respectively are formed in the insulating plastic sheet.
Specifically, the insulating plastic sheet is matched with the top cover plate and arranged on the lower surface of the top cover plate, and the insulating plastic sheet is connected with the top cover plate through a gluing process or an ultrasonic welding process.
In one example, the pole cap is a cuboid, the length and the width of the pole cap are both larger than the diameter of the pole cylinder, and the diameter of the pole cylinder is matched with the aperture of the first through hole and the second through hole, so that the pole cylinder is arranged in the first through hole and the second through hole in a penetrating manner; the pole body penetrates through the third through hole and the fourth through hole and is welded with the welding ring pressed below the insulating plastic sheet;
the groove of the pole column body is circular, and the ratio of the depth of the groove to the height of the pole column body ranges from 1/5 to 1/3;
the pole cap and the pole body are connected through a welding process.
Specifically, the pole cylinder and the pole cap are processed through an integrated forming process, the pole cylinder and the pole cap are connected more firmly in the same place through the processing mode, the problem that the pole is broken can be avoided, the service life of the pole is prolonged, and the service life of the secondary battery is prolonged.
Furthermore, the groove of the pole column body is circular, the ratio of the depth of the groove to the height of the pole column body ranges from 1/5 to 1/3, the groove wall of the groove is designed in an annular shape and does not have any water caltrop, so that the stress of the groove wall is more uniform, meanwhile, the ratio of the depth of the groove to the height of the pole column body ranges from 1/5 to 1/3, and the pole body in the range has better structural strength and is not easy to deform.
In one example, the plastic part comprises four side walls which are connected in sequence, and the four side walls are connected to the outer side of the pole cap;
the bottom of the plastic part is also provided with a fifth through hole which is matched with the diameter of the pole column body, so that the pole column body is arranged in the fifth through hole in a penetrating way.
Specifically, the plastic part in the first electrode assembly is a conductive plastic part and has a certain resistance value for ensuring the electrical connection between the pole and the top cover plate, and the plastic part in the second electrode assembly is an insulating plastic part.
Furthermore, the pole cap is clamped into the four side walls which are connected in sequence, and a fifth through hole which is matched with the diameter of the pole column body is further arranged at the bottom of the plastic part, so that the pole column body is arranged in the fifth through hole in a penetrating manner.
In one example, the sealing ring comprises an annular extension part and an annular flange arranged at one end of the annular extension part, the annular extension part is inserted between the pole column body and the hole walls of the first through hole and the second through hole, and the annular flange is pressed between the top cover plate and the pole cap.
Particularly, the sealing ring pressed between the top cover plate and the pole cap can effectively ensure the sealing performance of the first electrode assembly and the second electrode assembly.
In one example, the weld ring is aluminum.
In one example, the hole walls of the first through hole and the second through hole are provided with annular convex hull structures, and the convex hull structures are used for enhancing the structural strength of the top cover sheet.
Specifically, in the actual process, the first through hole and the second through hole may not include a convex hull structure, and the convex hull structure may increase the structural strength of the top cover plate, but may cause a reduction in the utilization rate of the internal space of the battery, so whether to set the convex hull structure may be flexibly selected according to the actual situation.
In one example, the top cover sheet is also provided with a liquid injection hole and an explosion-proof through hole, and an explosion-proof valve is arranged in the explosion-proof through hole.
A secondary battery comprises the secondary battery cover plate.
Specifically, secondary battery is through using the utility model discloses a secondary battery apron can effectively alleviate secondary battery's weight, has reached the lightweight demand of battery.
Examples
As shown in fig. 1 to 3, a secondary battery cap plate includes a cap sheet 1, a first electrode assembly and a second electrode assembly: the top cover plate 1 is provided with a first through hole 13 and a second through hole 14, and the first electrode assembly and the second electrode assembly are respectively connected with the first through hole 13 and the second through hole 14; first electrode subassembly and second electrode subassembly include utmost point post 2 respectively, plastic part 4, sealing washer 5 and welding ring 6, wherein, as shown in fig. 4, utmost point post 2 includes utmost point cap 21 and utmost point post body 22, utmost point cap 21 locates the one end of utmost point post body 22, the other end of utmost point post body 22 is equipped with recess 23, the top of utmost point post body 22 is located to sealing washer 5 cover, the bottom of utmost point post body 22 is located to welding ring 6 cover, the outside of sealing washer 5 and utmost point cap 21 is located to plastic part 4 cover, utmost point cap 21 and plastic part 4 all locate the top of top-cover piece 1. The secondary battery cover plate further comprises an insulating plastic sheet 7, the insulating plastic sheet is arranged on the lower surface of the top cover plate 1, and a third through hole 71 and a fourth through hole 72 corresponding to the first through hole 13 and the second through hole 14 are formed in the insulating plastic sheet 7. The plastic part 4 comprises four side walls which are connected in sequence, and the four side walls are connected to the outer side of the pole cap 21; the bottom of the plastic part 4 is further provided with a fifth through hole 41 adapted to the diameter of the pole body 22, so that the pole body is inserted into the fifth through hole 41. The sealing ring 5 comprises an annular extension part and an annular flange arranged at one end of the annular extension part, the annular extension part is inserted between the pole column body 22 and the hole walls of the first through hole 13 and the second through hole 14, and the annular flange is pressed between the top cover plate 1 and the pole cap 21. The top cover plate 1 is also provided with a liquid injection hole 12 and an explosion-proof through hole 11, and an explosion-proof valve 3 is arranged in the explosion-proof through hole 11.
As shown in fig. 5, the present embodiment also provides a secondary battery including the secondary battery cap plate.
In summary, the first electrode assembly and the second electrode assembly respectively include a pole, a plastic part, a sealing ring and a welding ring, wherein the pole includes a pole cap and a pole body, the pole cap is disposed at one end of the pole body, the other end of the pole body is provided with a groove, the sealing ring is sleeved on the top of the pole body, the welding ring is sleeved on the bottom of the pole body, and the pole cap and the plastic part are both disposed above the top cover plate; the design of the groove at one end of the pole body can effectively reduce the weight of the pole, and meanwhile, the first electrode assembly and the second electrode assembly do not comprise the riveting block, so the structural design of the first electrode assembly and the second electrode assembly can effectively reduce the weight of the secondary battery.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A secondary battery cap plate, comprising a top cap sheet, a first electrode assembly, and a second electrode assembly:
the top cover plate is provided with a first through hole and a second through hole, and the first electrode assembly and the second electrode assembly are respectively connected with the first through hole and the second through hole;
first electrode subassembly with second electrode subassembly includes utmost point post, plastic part, sealing washer and welding ring respectively, wherein, utmost point post includes utmost point cap and utmost point post body, utmost point cap is located the one end of utmost point post body, the other end of utmost point post body is equipped with the recess, the sealing washer cover is located the top of utmost point post body, the welding ring cover is located the bottom of utmost point post body, plastic part cover is located the sealing washer with the outside of utmost point cap, utmost point cap with the plastic part is all located the top of top sheet.
2. The secondary battery cover plate according to claim 1, further comprising an insulating plastic sheet disposed on a lower surface of the top lid sheet, wherein the insulating plastic sheet is provided with a third through hole and a fourth through hole corresponding to the first through hole and the second through hole, respectively.
3. The secondary battery cover plate according to claim 2, wherein the pole cap is a rectangular parallelepiped, the length and width of the pole cap are greater than the diameter of the pole cylinder, and the diameter of the pole cylinder is adapted to the diameters of the first through hole and the second through hole, so that the pole cylinder is inserted into the first through hole and the second through hole; the pole body penetrates through the third through hole and the fourth through hole and is welded with the welding ring pressed below the insulating plastic sheet;
the groove of the pole cylinder is circular, and the ratio of the depth of the groove to the height of the pole cylinder ranges from 1/5 to 1/3.
4. The secondary battery cap plate according to claim 3, wherein the plastic member includes four sidewalls connected in sequence, the four sidewalls being connected to the outside of the electrode cap;
and a fifth through hole which is matched with the diameter of the pole cylinder is formed in the bottom of the plastic part, so that the pole cylinder can be conveniently arranged in the fifth through hole in a penetrating manner.
5. The secondary battery cap plate according to claim 4, wherein the sealing ring includes an annular extension portion and an annular flange provided at one end of the annular extension portion, the annular extension portion is interposed between the pole cylinder and the hole walls of the first and second through holes, and the annular flange is pressed between the top cover sheet and the pole cap.
6. The secondary battery cap plate according to claim 1, wherein the pole cap and the pole cylinder are connected by a welding process.
7. The secondary battery cap plate according to claim 1, wherein the material of the weld ring is aluminum.
8. The secondary battery cap plate according to claim 1, wherein the hole walls of the first through hole and the second through hole are provided with an annular convex hull structure for enhancing the structural strength of the cap sheet.
9. The secondary battery cover plate according to claim 1, wherein the top cover plate is further provided with a liquid injection hole and an explosion-proof through hole, and an explosion-proof valve is arranged in the explosion-proof through hole.
10. A secondary battery comprising the secondary battery cap plate according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022327563.5U CN213340659U (en) | 2020-10-19 | 2020-10-19 | Secondary battery cover plate and secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022327563.5U CN213340659U (en) | 2020-10-19 | 2020-10-19 | Secondary battery cover plate and secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213340659U true CN213340659U (en) | 2021-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022327563.5U Active CN213340659U (en) | 2020-10-19 | 2020-10-19 | Secondary battery cover plate and secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213340659U (en) |
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2020
- 2020-10-19 CN CN202022327563.5U patent/CN213340659U/en active Active
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