CN218385461U - Top cover structure of cylindrical battery - Google Patents
Top cover structure of cylindrical battery Download PDFInfo
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- CN218385461U CN218385461U CN202222564271.2U CN202222564271U CN218385461U CN 218385461 U CN218385461 U CN 218385461U CN 202222564271 U CN202222564271 U CN 202222564271U CN 218385461 U CN218385461 U CN 218385461U
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- injection molding
- hole
- base plate
- pole
- cylindrical 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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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model relates to the technical field of battery production, and provides a cylindrical battery top cover structure, which comprises a base plate, a pole column and an injection molding part, wherein the base plate is provided with a through hole; the pole is positioned in the through hole; the injection molding piece is positioned in the through hole and isolates the substrate from the pole; the pole post structure comprises a through hole, a base plate and an injection molding piece, wherein the through hole is provided with a through hole; according to the arrangement of the structure, the reinforcing part is arranged in the through hole of the base plate, so that the structural strength of the base plate can be improved, the problem that the base plate can deform when injection molding is carried out to form an injection molding part is avoided, the sealing effect and the insulating effect of the battery top cover are favorably improved, and the safety performance of the battery is guaranteed.
Description
Technical Field
The utility model relates to a battery production technical field especially relates to a cylinder battery top cap structure.
Background
The power battery is an important energy supply element of a new energy automobile, and needs good safety performance in order to ensure the safety of the automobile and the personal safety of a driver so as to avoid accidents caused by thermal runaway; in the existing battery top cover assembly connecting structure, the top cover assembly is connected and sealed through riveting and ultrasonic welding or injection molding.
The utility model discloses a battery cover plate, which comprises a substrate, a positive pole column, a negative pole column, a positive pole sealing assembly and a negative pole sealing assembly, wherein the substrate is provided with a positive pole column hole and a negative pole column hole; a first fixing block is arranged in the middle of the positive pole in a surrounding manner, and a second fixing block is arranged in the middle of the negative pole in a surrounding manner; the positive electrode sealing assembly is arranged between the substrate and the positive electrode pole, and the negative electrode sealing assembly is arranged between the substrate and the negative electrode pole; the positive electrode seal assembly comprises a positive electrode first seal and a positive electrode second seal, and the negative electrode seal assembly comprises a negative electrode first seal and a negative electrode second seal.
According to the technical scheme, the sealing assembly is arranged in an injection molding mode, the sealing element is in direct contact with the substrate, the common arrangement structure of the existing injection molding sealing element is adopted, the requirement on the strength of a structural member is high in the injection molding process, and the substrate is easy to deform during injection molding of the sealing element due to the fact that the substrate is thin, so that the sealing effect and the insulation effect are affected, and the safety performance of the battery is reduced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a cylinder battery top cap structure that base plate intensity is high to solve the problem that current battery top cap easily takes place deformation when the sealing member is moulded plastics to the base plate.
The technical scheme of the utility model is realized like this: the utility model provides a top cover structure of a cylindrical battery, which comprises a base plate, a pole post and an injection molding piece, wherein,
the substrate is provided with a through hole;
the pole is positioned in the through hole;
the injection molding piece is positioned in the through hole and isolates the substrate from the pole;
still include the reinforcement, the reinforcement is located in the through-hole, the reinforcement laminating the pore wall of through-hole, the reinforcement with base plate fixed connection, the injection molding will the reinforcement with utmost point post is isolated.
On the basis of the above technical solution, it is preferable that the reinforcing member includes a fixing ring and an end plate, wherein,
the fixing ring is attached to the hole wall of the through hole;
the end plate with gu fixed ring formula structure as an organic whole, the end plate is in gu fixed ring's both ends face all has the setting, just the end plate laminating is in the substrate be surperficial on.
On the basis of above technical scheme, it is preferred, gu fixed ring is the annuliform ring, the end plate is in respectively be provided with four on fixed ring's the both ends face, just the end plate with gu fixed ring's center is the annular array as the centre of a circle.
On the basis of the above technical solution, preferably, a groove is formed in the surface of the base plate, and the end plate is embedded in the groove.
On the basis of the above technical solution, preferably, the thickness of the end plate is the same as the depth of the groove.
On the basis of the above technical solution, preferably, the groove is formed on one surface of the substrate.
On the basis of the technical scheme, the injection molding device is characterized by further comprising a connecting sheet, wherein the connecting sheet is arranged on one side, provided with the groove, of the base plate, the connecting sheet is fixedly connected with the pole, and the injection molding piece separates the connecting sheet from the base plate and the reinforcing piece.
On the basis of the above technical scheme, preferably, a protruding portion is arranged on the pole, and the diameter of the protruding portion is larger than that of the through hole.
On the basis of the technical scheme, the pole is preferably provided with an annular groove, the injection molding part is provided with a convex ring, and the convex ring is positioned in the annular groove.
The utility model discloses a cylinder battery top cap structure has following beneficial effect for prior art:
(1) Through being provided with a reinforcement in the through-hole that the base plate is used for installing utmost point post, it can improve the structural strength of base plate, avoids the base plate to take place deformation from the through-hole, and therefore, when moulding plastics between base plate and utmost point post, because the additional strengthening of reinforcement, deformation can not take place for the substrate stable in structure, and the injection molding that consequently forms can form effectual laminating with base plate and utmost point post, and is sealed and insulating effectual, can guarantee the security performance of battery.
(2) Through be provided with an annular on utmost point post, so when moulding plastics, the injection molding can form the bulge loop in the annular, is favorable to guaranteeing the axial stability that injection molding and utmost point post are connected, secondly, is provided with the protruding portion on the utmost point post, and the diameter of protruding portion is greater than the diameter of through-hole on the base plate, behind utmost point post welded connection piece, the protruding portion of connection piece and utmost point post can centre gripping reinforcement and injection molding, and it can further improve the structural stability of this top cap, is favorable to guaranteeing sealed effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a perspective view of a top cover structure of a cylindrical battery of the present invention;
fig. 2 is a front view of the top cap structure of the cylindrical battery of the present invention;
fig. 3 is a cross-sectional structural view of the top cover structure of the cylindrical battery of the present invention;
fig. 4 is an exploded view of the top cap structure of the cylindrical battery of the present invention;
fig. 5 is a bottom structure view of the base plate of the top cap structure of the cylindrical battery of the present invention;
fig. 6 is a connection structure diagram of the base plate and the reinforcement of the top cover structure of the cylindrical battery of the present invention;
fig. 7 is a cross-sectional structure diagram of the injection molding part of the top cover structure of the cylindrical battery of the present invention;
fig. 8 is a structure diagram of the terminal post of the top cap structure of the cylindrical battery of the present invention;
fig. 9 is a sectional structure view of the pole of the top cap structure of the cylindrical battery of the present invention;
fig. 10 is a structural diagram of the reinforcing member of the top cap structure of the cylindrical battery of the present invention before installation;
in the figure: the structure comprises a base plate 1, a through hole 101, a groove 102, a pole 2, a protruding portion 201, a ring groove 202, an injection molding piece 3, a convex ring 301, a reinforcing piece 4, a fixing ring 401, an end plate 402 and a connecting piece 5.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
In current battery top cap structure, the mode setting of moulding plastics is adopted for utmost point post and the sealed insulating part of base plate more, nevertheless because the base plate is thinner, when moulding plastics, the base plate easily takes place deformation, can lead to injection molding, base plate and utmost point post three's connection structure to be stable inadequately, influences sealed insulating effect, consequently, this technical scheme improves top cap structure.
As shown in figures 1-10, the utility model discloses a cylindrical battery top cap structure, including base plate 1, utmost point post 2, injection molding 3, reinforcement 4 and connection piece 5.
Wherein, a through hole 101 is arranged on the substrate 1; the pole 2 is positioned in the through hole 101; the injection molding piece 3 is positioned in the through hole 101, and the injection molding piece 3 isolates the substrate 1 from the pole 2;
the parts are the prior art, the injection molding part 3 is arranged between the substrate 1 and the pole 2 in an injection molding mode, and the injection molding part 3 plays a role in insulating the substrate 1 and the pole 2 and is also an important component of a battery top cover sealing structure;
in the technical scheme, in order to avoid the deformation of the substrate 1 caused by the injection molding of the injection molding part 3, the substrate 1 is provided with the reinforcing part 4, the reinforcing part 4 is positioned in the through hole 101, the reinforcing part 4 is attached to the hole wall of the through hole 101, the reinforcing part 4 is fixedly connected with the substrate 1, and the injection molding part 3 isolates the reinforcing part 4 from the pole 2;
when injection molding is carried out, the base plate 1 is not easy to deform due to the reinforcing effect of the reinforcing piece 4, so that the base plate 1 and the pole 2 can be effectively attached after the injection molding piece 3 is molded, the top cover has good structural stability, and good sealing and insulating effects can be guaranteed;
specifically, as shown in fig. 6 and 10, the reinforcing member 4 includes a fixing ring 401 and an end plate 402, wherein the fixing ring 401 fits the hole wall of the through hole 101; the end plate 402 and the fixing ring 401 are of an integrated structure, the end plate 402 is arranged on both end faces of the fixing ring 401, and the end plate 402 is attached to the surface of the substrate 1;
fig. 10 is a schematic structural view of the reinforcing member 4 before installation, and after the reinforcing member 4 is installed in the through hole 101 of the base plate 1, the end plate 402 of the reinforcing member 4 is folded over so that the end plate 402 is attached to the surface of the base plate 1, so that the reinforcing member 4 and the base plate 1 are fixedly connected, and the specific structure is shown in fig. 5; thus, the structural strength of the substrate 1 is improved through the reinforcing part 4, then the substrate 1 and the pole 2 are positioned, and then the injection molding part 3 is formed through an injection molding mode; before moulding plastics, need carry out the nanocrystallization to base plate 1, utmost point post 2 and reinforcement 4, form injection molding 3 through nanometer injection molding process, it has good laminating effect, stable in structure and leakproofness are good.
In this embodiment, as a preferable mode, as shown in fig. 10, the fixing ring 401 is a circular ring, the end plates 402 are respectively provided with four on both end surfaces of the fixing ring 401, and the end plates 402 are in a circular array with the center of the fixing ring 401 as the center;
by arranging the end plates 402 on the end surfaces of the fixing rings 401 in an annular array, after the reinforcing member 4 and the substrate 1 are structured, the end plates 402 are uniformly spaced, so that the substrate 1 is uniformly reinforced, and the substrate 1 can be ensured to have good structural stability during injection molding; of course, the specific number of the end plates 402 may also be changed according to the specific requirements of the substrate 1, and the specific shape of the end plates 402 may also be adaptively adjusted according to the specific requirements;
as shown in fig. 5, in order to reduce the longitudinal height of the top cover, a groove 102 is formed on the surface of the substrate 1, and an end plate 402 is embedded in the groove 102; therefore, the longitudinal height of the top cover can be prevented from being increased by the end plate 402, and the structural stability of the reinforcing part 4 after installation can be ensured, so that the reinforcing part 4 is prevented from rotating during injection molding;
furthermore, the thickness of the end plate 402 is the same as the depth of the groove 102, so that after the reinforcing part 4 is installed, the end plate 402 is flush with the surface of the base plate 1, the thickness of the injection molding part 3 can be reduced, the condition that the injection molding thickness of the injection molding part 3 is increased due to the fact that the end plate 402 needs to be wrapped is avoided, the height and the weight of the top cover are prevented from being excessively increased, and the energy density of the battery is favorably ensured;
in order to avoid the reduction of the structural strength of the substrate 1 caused by the formation of the groove 102, the groove 102 may be formed on one surface of the substrate 1, so as to prevent the instability of the reinforcing member 4 after installation;
as shown in fig. 3, the top cover is further provided with a connecting sheet 5 for connecting a battery winding core, the connecting sheet 5 is arranged on one side of the base plate 1 provided with the groove 102, the connecting sheet 5 is fixedly connected with the pole 2, and the injection molding piece 3 separates the connecting sheet 5 from the base plate 1 and the reinforcing piece 4;
because the connecting sheet 5 needs to be insulated from the substrate 1, a gap is originally reserved between the connecting sheet 5 and the substrate 1 and used for injection molding to form the injection molding part 3 for insulation, in order to avoid the problem that the end plate 402 of the reinforcing part 4 occupies the gap between the connecting sheet 5 and the substrate 1, the optimal scheme is to provide the groove 102 on the side of the substrate 1 facing the connecting sheet 5, the end plate 402 of the reinforcing part 4 facing one end of the connecting sheet 5 can be located in the groove 102, and therefore the end plate 402 is prevented from occupying the gap between the substrate 1 and the connecting sheet 5.
In the present embodiment, as shown in fig. 3, 8 and 9, the pole post 2 is preferably provided with a protrusion 201, and the diameter of the protrusion 201 is larger than that of the through hole 101;
therefore, after the connecting sheet 5 is welded on the pole 2, the protruding part 201 of the pole 2 and the connecting sheet 5 can play a role in clamping, which is beneficial to ensuring the structural stability of the injection-molded part 3 and the reinforcing part 4;
further, an annular groove 202 is formed in the pole 2, a convex ring 301 is arranged on the injection molding piece 3, and the convex ring 301 is located in the annular groove 202;
therefore, after the injection molding part 3 is formed by injection molding, the convex ring 301 can play a role in axial limiting, and the stability of connection between the injection molding part 3 and the pole 2 can be further ensured.
The method comprises the following specific implementation steps:
firstly, set up out recess 102 at the bottom surface of base plate 1, later place reinforcing member 4 in the through-hole 101 of base plate 1, turn over end plate 402 again for on end plate 402 supports and holds base plate 1, strengthen base plate 1, before moulding plastics, carry out the nanocrystallization to base plate 1, utmost point post 2 and reinforcing member 4, later fix a position base plate 1 and utmost point post 2, it seals up insulating to mould plastics again to form injection molding 3, at last with connection piece 5 and utmost point post 2 welding can.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A top cover structure of a cylindrical battery comprises a substrate (1), a pole (2) and an injection molding part (3), wherein,
a through hole (101) is formed in the substrate (1);
the pole (2) is positioned in the through hole (101);
the injection molding part (3) is positioned in the through hole (101), and the injection molding part (3) isolates the substrate (1) from the pole (2);
the method is characterized in that: still include reinforcement (4), reinforcement (4) are located in through-hole (101), reinforcement (4) laminating the pore wall of through-hole (101), reinforcement (4) with base plate (1) fixed connection, injection molding (3) will reinforcement (4) with utmost point post (2) are isolated.
2. The cylindrical battery top cap structure of claim 1, wherein: the reinforcement (4) comprises a fixing ring (401) and an end plate (402), wherein,
the fixing ring (401) is attached to the hole wall of the through hole (101);
end plate (402) with gu fixed ring (401) formula structure as an organic whole, end plate (402) are in gu the both ends face of fixed ring (401) all has the setting, just end plate (402) laminating is in on the surface of base plate (1).
3. The cylindrical battery top cap structure of claim 2, wherein: the fixed ring (401) is a circular ring, the end plate (402) is arranged on two end faces of the fixed ring (401) respectively, and the end plate (402) is arranged at the center of the fixed ring (401) and is an annular array.
4. The cylindrical battery top cap structure of claim 2, wherein: a groove (102) is formed in the surface of the base plate (1), and the end plate (402) is embedded in the groove (102).
5. The cylindrical battery top cap structure of claim 4, wherein: the thickness of the end plate (402) is the same as the depth of the groove (102).
6. The cylindrical battery top cap structure of claim 4, wherein: the groove (102) is formed in one surface of the substrate (1).
7. The cylindrical battery top cap structure of claim 6, wherein: the novel pole piece is characterized by further comprising a connecting piece (5), wherein the connecting piece (5) is arranged on one side, provided with the groove (102), of the base plate (1), the connecting piece (5) is fixedly connected with the pole (2), and the injection molding piece (3) isolates the connecting piece (5) from the base plate (1) and the reinforcing piece (4).
8. The cylindrical battery top cap structure of claim 6, wherein: the pole column (2) is provided with a protruding portion (201), and the diameter of the protruding portion (201) is larger than that of the through hole (101).
9. The cylindrical battery top cover structure of claim 1, wherein: be provided with annular (202) on utmost point post (2), be provided with bulge loop (301) on injection molding (3), bulge loop (301) are located in annular (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222564271.2U CN218385461U (en) | 2022-09-27 | 2022-09-27 | Top cover structure of cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222564271.2U CN218385461U (en) | 2022-09-27 | 2022-09-27 | Top cover structure of cylindrical battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218385461U true CN218385461U (en) | 2023-01-24 |
Family
ID=84955539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222564271.2U Active CN218385461U (en) | 2022-09-27 | 2022-09-27 | Top cover structure of cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218385461U (en) |
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2022
- 2022-09-27 CN CN202222564271.2U patent/CN218385461U/en active Active
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