CN220492003U - Cover plate assembly and square battery - Google Patents
Cover plate assembly and square battery Download PDFInfo
- Publication number
- CN220492003U CN220492003U CN202321199038.7U CN202321199038U CN220492003U CN 220492003 U CN220492003 U CN 220492003U CN 202321199038 U CN202321199038 U CN 202321199038U CN 220492003 U CN220492003 U CN 220492003U
- Authority
- CN
- China
- Prior art keywords
- cover plate
- pole
- mounting hole
- annular connecting
- plastic part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 35
- 238000009413 insulation Methods 0.000 claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 20
- 229910052782 aluminium Inorganic materials 0.000 claims description 20
- 238000004804 winding Methods 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 238000004880 explosion Methods 0.000 claims 4
- 238000001746 injection moulding Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The application provides a cover plate assembly and a square battery. The cover plate assembly comprises a cover plate and a terminal structure, wherein the cover plate is provided with a mounting hole, the terminal structure is positioned in the mounting hole and is connected with the cover plate, the terminal structure comprises a pole, an upper plastic part, a sealing insulation assembly and an annular connecting part, the pole is arranged in the mounting hole in a penetrating mode and is connected with the annular connecting part, the upper plastic part is clamped between the cover plate and the pole, the sealing insulation assembly is positioned in the mounting hole, and the sealing insulation assembly is clamped and abutted between the cover plate and the annular connecting part.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a cover plate assembly and a square battery.
Background
In modern society, more and more electric tools and new energy vehicles are driven by power sources, and batteries are widely used in the electric tools and the new energy vehicles due to their excellent characteristics such as high capacity and high safety. The top cover structure of the traditional square battery generally comprises a cover plate, a connecting sheet, a pole and an insulating sheet, wherein the insulating sheet is clamped between the pole and the cover plate so as to electrically insulate the cover plate, and meanwhile, the connecting sheet is respectively connected with the pole and the winding core so as to realize the charge and discharge functions of the battery.
For example, chinese patent application No. CN202021571822.2 discloses a secondary battery top cover comprising: the top cover piece is provided with a first electrode leading-in hole, the first electrode unit comprises a first pole fixed in the first electrode leading-in hole in an insulating way and an injection molding piece surrounding the first pole and insulating the first pole and the top cover piece, the first pole cylinder forms an annular groove towards the outer wall of the injection molding piece in the middle part in a concave way, the injection molding piece is clamped in the annular groove, and a chamfer is arranged at the joint of the groove bottom of the annular groove and the groove wall at the upper part. The injection molding piece and the top cover piece are more firm in connectivity through the annular groove, and the connection strength of the injection molding piece and the top cover piece is higher. Meanwhile, a chamfer is arranged at the joint of the groove bottom of the annular groove and the groove wall at the upper part, and a stress buffer zone can be formed in the annular groove by the arrangement of the chamfer so as to relieve the pressure impact of molten plastic on the upper region of the pole, so that the pole at the upper part of the annular groove is prevented from deforming, and the sealing property and the safety of the top cover of the secondary battery are improved.
However, the structural design of the secondary battery top cover described above has the following problems in use:
the secondary battery top cover pole is connected with the injection molding piece and then clamped on the top cover piece, namely the pole is connected with the top cover piece through the injection molding piece, and the injection molding piece is low in structural strength, so that the compression capacity of the pole is low; meanwhile, the pole penetrating through hole is required to be connected and fixed with the connecting sheet, the lower plastic and other components, so that the area of the pole is larger, the weight of the cover plate of the battery is larger, and the energy density of the battery is influenced.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide a cover plate assembly and a square battery, wherein the cover plate assembly has higher compression strength of a pole, lighter weight and higher battery energy density.
The aim of the utility model is realized by the following technical scheme:
a cover plate assembly comprising:
the cover plate is provided with a mounting hole, the terminal structure is located in the mounting hole and is connected with the cover plate, the terminal structure comprises a pole, an upper plastic part, a sealing insulation assembly and an annular connecting piece, the pole penetrates through the mounting hole and is connected with the annular connecting piece, the upper plastic part is connected with the pole, the sealing insulation assembly is located in the mounting hole, and the sealing insulation assembly is clamped and abutted between the cover plate and the annular connecting piece.
In one embodiment, the upper plastic part and the pole are integrally formed.
In one embodiment, the number of the terminal structures is two, the number of the mounting holes is two, and each terminal structure is correspondingly arranged in the mounting hole and connected with the cover plate; and/or the number of the groups of groups,
the upper plastic part is molded on the outer periphery of the pole, the upper plastic part is positioned on the outer side of the cover plate, a limit flange is arranged on the cover plate in a surrounding mode at the mounting hole, and the limit flange is abutted to the upper plastic part.
In one embodiment, the mounting hole comprises a containing groove body, a mounting hole body and an embedded groove body which are communicated, the sealing insulation assembly comprises a sealing ring and a lower plastic part, the sealing ring is located in the containing groove body and is in butt joint with the pole, the lower plastic part is located in the embedded groove body and is in butt joint with the annular connecting piece, and the sealing ring and the lower plastic part are all clamped and butt-jointed between the hole wall of the mounting hole body and the annular connecting piece.
In one embodiment, the annular connecting piece is provided with a embedding groove, and the embedding groove body are correspondingly arranged, so that the lower plastic piece is clamped and abutted between the cover plate and the annular connecting piece.
In one embodiment, the pole comprises an aluminum pole portion and a copper pole portion, wherein the aluminum pole portion and the upper plastic piece are connected, the aluminum pole portion is further abutted to the sealing ring, and the copper pole portion and the annular connecting piece are connected.
In one embodiment, the aluminum pole portion is provided with a receiving groove, and the receiving groove body are correspondingly arranged, so that the sealing ring is clamped and abutted between the cover plate and the aluminum pole portion.
In one embodiment, the upper plastic part is provided with an annular groove, and the aluminum pole part is arranged in the annular groove and connected with the upper plastic part.
The square battery comprises a shell, a winding core and a switching piece, wherein the cover plate assembly is characterized in that the shell is connected with the cover plate, the shell and the cover plate are jointly formed with an accommodating cavity, the winding core and the switching piece are both positioned in the accommodating cavity, the terminal structure is arranged in the mounting hole in a penetrating mode and is connected with one end of the switching piece, and the other end of the switching piece is connected with the winding core.
In one embodiment, the square battery further comprises an explosion-proof piece, the cover plate is provided with an explosion-proof hole, and the explosion-proof piece is located in the explosion-proof hole and connected with the cover plate.
Compared with the prior art, the utility model has at least the following advantages:
the cover plate assembly is characterized in that the polar post is connected with the annular connecting piece after penetrating through the mounting hole, and the polar post is fixed through the annular connecting piece, namely, part of the structure of the polar post is replaced by the annular connecting piece, so that the size of the polar post is reduced, the area of the polar post is reduced, the material of the annular connecting piece is lighter than that of the polar post, the weight of the cover plate assembly is further reduced, and the energy density of the battery is improved; meanwhile, the upper plastic part is clamped and abutted between the pole and the cover plate, so that the stress area of the pole is increased, and the compression strength of the pole is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a cover assembly according to an embodiment;
FIG. 2 is a cross-sectional view of the cover plate assembly shown in FIG. 1;
FIG. 3 is an enlarged schematic view of the structure at A of the cover plate assembly shown in FIG. 2;
FIG. 4 is a schematic diagram of a prismatic battery according to an embodiment;
fig. 5 is a structural cross-sectional view of the prismatic battery shown in fig. 4.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different 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.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The application provides a cover plate assembly, including apron and terminal structure, the mounting hole has been seted up to the apron, the terminal structure be located in the mounting hole and with the apron is connected, the terminal structure includes the utmost point post, goes up plastic part, sealed insulating subassembly and annular connecting piece, the utmost point post wear to locate the mounting hole and with annular connecting piece connects, go up plastic part centre gripping in the apron reaches between the utmost point post, sealed insulating subassembly is located in the mounting hole, and sealed insulating subassembly centre gripping butt is in the apron reaches between the annular connecting piece.
The cover plate assembly is characterized in that the polar post is connected with the annular connecting piece after penetrating through the mounting hole, and the polar post is fixed through the annular connecting piece, namely, part of the structure of the polar post is replaced by the annular connecting piece, so that the size of the polar post is reduced, the area of the polar post is reduced, the material of the annular connecting piece is lighter than that of the polar post, the weight of the cover plate assembly is further reduced, and the energy density of the battery is improved; meanwhile, the upper plastic part is clamped and abutted between the pole and the cover plate, so that the stress area of the pole is increased, and the compression strength of the pole is improved.
For better understanding of the technical solutions and advantageous effects of the present application, the following details are further described with reference to specific embodiments:
as shown in fig. 1 to 3, the cover plate assembly 10a of an embodiment includes a cover plate 100 and a terminal structure 200, the cover plate 100 is provided with a mounting hole 110, the terminal structure 200 is located in the mounting hole 110 and connected with the cover plate 100, the terminal structure 200 includes a pole post 210, an upper plastic member 220, a sealing insulation assembly 230 and an annular connecting member 240, the pole post 210 is disposed through the mounting hole 110 and connected with the annular connecting member 240, the upper plastic member 220 is clamped between the cover plate 100 and the pole post 210, the stress area of the pole post 210 is increased, the sealing insulation assembly 230 is located in the mounting hole 110, and the sealing insulation assembly 230 is clamped and abutted between the cover plate 100 and the annular connecting member 240.
In this embodiment, the pole 210 is integrally connected with the annular connecting member 240 through welding after penetrating the mounting hole 110, and the sealing insulating assembly 230 is clamped and abutted between the cover plate 100 and the annular connecting member 240, that is, the sealing insulating assembly 230 is compressed by the annular connecting member 240, so that the structure is compact, and the sealing performance of the battery and the insulation performance of the battery cover plate 100 are simultaneously satisfied.
The above-mentioned cover plate assembly 10a, the post 210 is connected with the annular connecting piece 240 after penetrating the mounting hole 110, fix the post 210 through the annular connecting piece 240, namely the partial structure of the post 210 is replaced by the annular connecting piece 240, thus reducing the size of the post 210 and the area of the post 210, and the material of the annular connecting piece 240 is lighter than the post 210, thereby reducing the weight of the cover plate assembly 10a and improving the energy density of the battery; meanwhile, the upper plastic is clamped and abutted between the pole 210 and the cover plate 100, so that the stress area of the pole 210 is increased, and the compression strength of the pole 210 is improved.
In one embodiment, the upper plastic 220 and the pole 210 are integrally formed, so as to improve the structural strength of the upper plastic 220 and the pole 210.
As shown in fig. 1, in one embodiment, the number of the terminal structures 200 is two, the number of the mounting holes 110 is two, and each terminal structure 200 is correspondingly disposed in the mounting hole 110 and connected with the cover plate 100. It can be understood that the two terminal structures 200 respectively include a positive electrode post 210 and a negative electrode post 210, and the positive electrode post 210 and the negative electrode post 210 are respectively connected with the winding core 400, so as to realize the charge and discharge functions of the battery.
As shown in fig. 1 and 2, in one embodiment, the upper plastic member 220 is overmolded on the outer periphery of the pole 210, and the upper plastic member 220 is located at the outer side of the cover plate 100, and the cover plate 100 is provided with a limiting flange 130 around the mounting hole 110, and the limiting flange 130 abuts against the upper plastic member 220. It can be appreciated that the pole 210 is abutted to the cover plate 100 through the upper plastic member 220, and the upper plastic member 220 is overmolded on the outer periphery of the pole 210, so as to increase the stress area of the pole 210 and further increase the compression strength of the pole 210.
In one embodiment, the upper plastic 220 and the pole 210 are integrally injection molded. It can be appreciated that the upper plastic 220 and the pole 210 are integrally injection molded, so that the structural strength of the upper plastic 220 and the pole 210 is improved.
As shown in fig. 3, in one embodiment, the mounting hole 110 includes a receiving groove body 111, a mounting hole body 112 and an embedded groove body 113 that are communicated, the sealing insulation assembly 230 includes a sealing ring 231 and a lower plastic member 232, the sealing ring 231 is located in the receiving groove body 111 and is abutted to the pole 210, the lower plastic member 232 is located in the embedded groove body 113 and is abutted to the annular connecting member 240, and the sealing ring 231 and the lower plastic member 232 are both clamped and abutted between the hole wall of the mounting hole body 112 and the annular connecting member 240.
It can be understood that the sealing ring 231 is sleeved on the accommodating groove body 111 and abuts against the pole 210, i.e. the sealing ring 231 is pressed on the cover plate 100 by the pole 210, so as to improve the sealing performance of the battery. Further, the lower plastic member 232 is embedded in the embedded groove body 113 and abuts against the annular connecting member 240, that is, the lower plastic member 232 is pressed on the cover plate 100 by the annular connecting member 240, and the cover plate 100 is insulated under the combined action of the upper plastic member 220 and the lower plastic member 232.
As shown in fig. 3, in one embodiment, the annular connecting member 240 is provided with a fitting groove 241, and the fitting groove 241 is disposed corresponding to the fitting groove body 113, so that the lower plastic member 232 is clamped between the cover plate 100 and the annular connecting member 240. It will be appreciated that the lower plastic member 232 is clamped and compressed between the cover plate 100 and the annular connecting member 240 by the combination of the embedded groove 241 and the embedded groove body 113.
As shown in fig. 3, in one embodiment, the pole 210 includes an aluminum pole portion 211 and a copper pole portion 212 connected, the aluminum pole portion 211 is connected with the upper plastic member 220, the aluminum pole portion 211 is also abutted with the seal ring 231, and the copper pole portion 212 is connected with the annular connecting member 240. It can be appreciated that the copper pole portion 212 is welded with the annular connecting member 240 to fix the whole pole 210, and meanwhile, the copper pole portion 212 is welded with the switching piece 500 to realize the conducting function of the battery, and the aluminum pole portion 211 is connected with the upper plastic, so that the weight of the copper-aluminum connected pole 210 is lighter than that of the traditional copper pole 210, the weight of the cover plate 100 is further reduced, and the energy density of the battery is improved.
As shown in fig. 3, in one embodiment, the aluminum pole portion 211 is provided with a receiving groove 211a, and the receiving groove 211a is disposed corresponding to the receiving groove body 111, so that the seal ring 231 is clamped between the cover plate 100 and the aluminum pole portion 211. It will be appreciated that the seal ring 231 is clamped and compressed between the post 210 and the cover plate 100 under the co-action of the accommodating groove 211a and the accommodating groove body 111.
As shown in fig. 3, in one embodiment, the upper plastic member 220 is provided with an annular groove 221, and the aluminum pole portion 211 is disposed in the annular groove 221 and connected with the upper plastic member 220, so that the aluminum pole portion 211 is more tightly connected with the upper plastic member 220.
As shown in fig. 4 and fig. 5, the present application further provides a square battery 10, which includes a housing 300, a winding core 400, and a switching piece 500, wherein the cover plate assembly 10a according to any of the foregoing embodiments, the housing 300 is connected with the cover plate 100, the housing 300 and the cover plate 100 are jointly formed with a housing cavity 310, the winding core 400 and the switching piece 500 are both located in the housing cavity 310, the terminal structure 200 is connected with one end of the switching piece 500 through the mounting hole 110, and the other end of the switching piece 500 is connected with the winding core 400. It can be understood that the two ends of the adapting piece 500 are respectively connected with the winding core 400 and the terminal structure 200, so as to realize the conducting function of the battery.
As shown in fig. 4, in one embodiment, the prismatic battery 10 further includes an explosion-proof member 600, the cover plate 100 is provided with explosion-proof holes 120, and the explosion-proof member 600 is located in the explosion-proof holes 120 and connected with the cover plate 100, so that when a large amount of gas is generated in the battery during a fault, the gas breaks through the explosion-proof member 600 through the explosion-proof holes 120, and the battery is prevented from burning or exploding.
Compared with the prior art, the utility model has at least the following advantages:
the cover plate assembly is characterized in that the polar post is connected with the annular connecting piece after penetrating through the mounting hole, and the polar post is fixed through the annular connecting piece, namely, part of the structure of the polar post is replaced by the annular connecting piece, so that the size of the polar post is reduced, the area of the polar post is reduced, the material of the annular connecting piece is lighter than that of the polar post, the weight of the cover plate assembly is further reduced, and the energy density of the battery is improved; meanwhile, the upper plastic part is clamped and abutted between the pole and the cover plate, so that the stress area of the pole is increased, and the compression strength of the pole is further increased.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The cover plate assembly comprises a cover plate and a terminal structure, wherein the cover plate is provided with a mounting hole, the terminal structure is positioned in the mounting hole and is connected with the cover plate,
the terminal structure comprises a pole, an upper plastic part, a sealing insulation assembly and an annular connecting part, wherein the pole penetrates through the mounting hole and is connected with the annular connecting part, the upper plastic part is clamped and abutted between the cover plate and the pole, the sealing insulation assembly is positioned in the mounting hole, and the sealing insulation assembly is clamped and abutted between the cover plate and the annular connecting part.
2. The cover plate assembly of claim 1, wherein the upper plastic part and the pole are of an integrally formed structure.
3. The cover plate assembly according to claim 1, wherein the number of the terminal structures is two, the number of the mounting holes is two, and each terminal structure is correspondingly arranged in the mounting hole and connected with the cover plate; and/or the number of the groups of groups,
the upper plastic part is molded on the outer periphery of the pole, the upper plastic part is positioned on the outer side of the cover plate, a limit flange is arranged on the cover plate in a surrounding mode at the mounting hole, and the limit flange is abutted to the upper plastic part.
4. The cover plate assembly of claim 1, wherein the mounting hole comprises a containing groove body, a mounting hole body and an embedded groove body which are communicated, the sealing insulation assembly comprises a sealing ring and a lower plastic part, the sealing ring is positioned in the containing groove body and is abutted to the pole, the lower plastic part is positioned in the embedded groove body and is abutted to the annular connecting piece, and the sealing ring and the lower plastic part are clamped and abutted between the hole wall of the mounting hole body and the annular connecting piece.
5. The cover plate assembly of claim 4, wherein the annular connecting piece is provided with a groove, and the groove is arranged corresponding to the groove body, so that the lower plastic piece is clamped and abutted between the cover plate and the annular connecting piece.
6. The cover plate assembly of claim 4, wherein the post comprises an aluminum post portion and a copper post portion connected, the aluminum post portion is connected with the upper plastic part, the aluminum post portion is further abutted with the sealing ring, and the copper post portion is connected with the annular connecting piece.
7. The cover plate assembly according to claim 6, wherein the aluminum pole portion is provided with a receiving groove, and the receiving groove is disposed corresponding to the receiving groove body, so that the sealing ring is clamped and abutted between the cover plate and the aluminum pole portion.
8. The cover plate assembly of claim 6, wherein the upper plastic part is provided with an annular groove, and the aluminum pole portion is disposed in the annular groove and connected with the upper plastic part.
9. The square battery is characterized by comprising a shell, a winding core, a switching piece and the cover plate assembly according to any one of claims 1-8, wherein the shell is connected with the cover plate, a containing cavity is formed between the shell and the cover plate, the winding core and the switching piece are both positioned in the containing cavity, the terminal structure is arranged in the mounting hole in a penetrating mode and is connected with one end of the switching piece, and the other end of the switching piece is connected with the winding core.
10. The prismatic battery according to claim 9, further comprising an explosion proof member, wherein the cover plate is provided with an explosion proof hole, and wherein the explosion proof member is positioned in the explosion proof hole and connected to the cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321199038.7U CN220492003U (en) | 2023-05-17 | 2023-05-17 | Cover plate assembly and square battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321199038.7U CN220492003U (en) | 2023-05-17 | 2023-05-17 | Cover plate assembly and square battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220492003U true CN220492003U (en) | 2024-02-13 |
Family
ID=89824814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321199038.7U Active CN220492003U (en) | 2023-05-17 | 2023-05-17 | Cover plate assembly and square battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220492003U (en) |
-
2023
- 2023-05-17 CN CN202321199038.7U patent/CN220492003U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |