CN218997026U - Lithium battery cover plate assembly and lithium battery - Google Patents
Lithium battery cover plate assembly and lithium battery Download PDFInfo
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- CN218997026U CN218997026U CN202223313258.6U CN202223313258U CN218997026U CN 218997026 U CN218997026 U CN 218997026U CN 202223313258 U CN202223313258 U CN 202223313258U CN 218997026 U CN218997026 U CN 218997026U
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- cover plate
- battery
- insulating pad
- lithium 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
Abstract
The utility model relates to the technical field of batteries, and provides a lithium battery cover plate assembly and a lithium battery, wherein the lithium battery cover plate assembly comprises: a rivet, and a threaded terminal, a first insulating pad, a cover plate, a second insulating pad and a current collecting disc which are sequentially connected through the rivet; the threaded terminal is electrically insulated from the cover plate by a first insulating pad; the cover plate is electrically insulated from the current collecting disc through a second insulating pad; the rivet is electrically insulated from the cap plate and electrically connected to the threaded terminal. So set up, when assembling battery module, the battery can be fixed on the module in a mode of similar bolt fastening to realize the quick installation and the dismantlement of battery, improve battery module's assembly efficiency. When a single battery fails, the failed battery can be detached and replaced by a new battery, so that the problem that the battery module is easy to be scrapped as a whole due to the failure of the single battery is solved, the gradient utilization and recovery of the battery are facilitated, and the cost is reduced.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a lithium battery cover plate assembly and a lithium battery.
Background
In recent years, the new energy automobile output in China is rapidly increased due to policy and subsidy, so that the power battery demand is increased, and meanwhile, the number of power batteries retired every year is also increased. The gradient utilization and recovery of power lithium batteries is a problem that must be faced.
The power battery pack is characterized in that the most basic component is a module, and the module is formed by connecting a plurality of single batteries in series and parallel. At present, the serial and parallel connection of single batteries are mostly realized by connecting current-carrying sheets with the positive electrode and the negative electrode of the battery in a resistance welding or laser welding mode.
However, when one of the batteries in the module is in a problem, the whole module is scrapped, the gradient utilization of the batteries is affected, and the cost is increased.
Disclosure of Invention
The utility model provides a lithium battery cover plate assembly and a lithium battery, which are used for solving the defect that a battery module is easy to discard integrally due to single battery faults in the prior art, and are beneficial to realizing gradient utilization and recovery of batteries and reducing cost.
The utility model provides a lithium battery cover plate component, which comprises the following components:
a rivet, and a threaded terminal, a first insulating pad, a cover plate, a second insulating pad and a current collecting disc which are sequentially connected through the rivet;
the threaded terminal is electrically insulated from the cover plate by the first insulating pad;
the cover plate is electrically insulated from the current collecting disc through the second insulating pad;
the rivet is electrically insulated from the cap plate and electrically connected to the threaded terminal.
According to the lithium battery cover plate assembly provided by the utility model, the cover plate is provided with the communication hole, the insulating ring is penetrated in the communication hole, and the rivet penetrates through the insulating ring.
According to the lithium battery cover plate assembly provided by the utility model, the insulating ring is integrally formed on the first insulating pad or the second insulating pad.
According to the lithium battery cover plate assembly provided by the utility model, at least one rivet is arranged.
According to the lithium battery cover plate assembly provided by the utility model, the surface of the threaded terminal, which is away from the cover plate, is provided with the mark groove in the shape of one line or the cross.
According to the lithium battery cover plate assembly provided by the utility model, the current collecting disc comprises a first connecting part and a second connecting part; the first connecting part corresponds to the second insulating pad and is used for allowing the rivet to pass through; the second connecting part extends to the outside of the second insulating pad, and a plurality of boss-shaped welding areas are formed on the surface, away from the second insulating pad, of the second connecting part.
According to the lithium battery cover plate assembly provided by the utility model, a plurality of grooves are formed in one surface of the second connecting part, which faces the second insulating pad, and the grooves are distributed around the center of the second connecting part; the groove is formed by stamping, so that the welding area is formed on one surface, deviating from the second insulating pad, of the second connecting portion.
According to the lithium battery cover plate assembly provided by the utility model, the cover plate is provided with the liquid injection hole for communicating the inner cavity of the battery; the first insulating pad is provided with a first through hole, the threaded terminal is provided with a second through hole, and the positions of the first through hole and the second through hole correspond to the positions of the liquid injection holes.
According to the lithium battery cover plate assembly provided by the utility model, the cover plate is provided with the explosion-proof valve, the first insulating pad is provided with the first through hole, the threaded terminal is provided with the second through hole, and the positions of the first through hole and the second through hole are corresponding to the positions of the explosion-proof valve.
The utility model also provides a lithium battery, which comprises the lithium battery cover plate assembly.
According to the lithium battery cover plate assembly and the lithium battery, the threaded terminal, the first insulating pad, the cover plate, the second insulating pad and the current collecting disc are connected into a whole through the rivet, so that the stability of connection of the threaded terminal is guaranteed. When the battery is assembled, the current collecting disc is connected with the winding core in the battery shell and used for leading out current, the cover plate is fixed with the battery shell and used for packaging the battery, and the threaded terminal is electrically connected with the current collecting disc through the rivet, so that the threaded terminal can be used as an electrode of the battery. The screw terminal is electrically insulated from the cover plate by the first insulating pad, and the current collecting disc is electrically insulated from the cover plate by the second insulating pad, so that the problem of short circuit is avoided. When the battery module is assembled, the battery can be fixed on the module in a mode similar to bolt fixing, so that the quick installation and disassembly of the battery are realized, and the assembly efficiency of the battery module is improved. When a single battery fails, the failed battery can be detached and replaced by a new battery, so that the problem that the battery module is easy to be scrapped as a whole due to the failure of the single battery is solved, the gradient utilization and recovery of the battery are facilitated, and the cost is reduced.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is an overall view of a lithium battery cover plate assembly provided by the utility model after assembly;
fig. 2 is a schematic structural diagram of a lithium battery cover plate assembly according to the present utility model;
fig. 3 is a second schematic structural view of the lithium battery cover plate assembly according to the present utility model.
Reference numerals:
1. a rivet; 10. a large end; 2. a threaded terminal; 20. a third rivet hole; 21. a sign groove; 22. a second through hole; 3. a first insulating pad; 30. a first rivet hole; 31. a first through hole; 4. a cover plate; 40. a communication hole; 41. a liquid injection hole; 42. an explosion-proof valve; 5. a second insulating pad; 50. a second rivet hole; 6. a collecting tray; 60. a fourth rivet hole; 61. a first connection portion; 62. a second connecting portion; 620. a groove; 7. an insulating ring.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In order to facilitate understanding of the lithium battery cover plate assembly and the lithium battery provided by the utility model, an application scene of the lithium battery cover plate assembly is explained first, a battery module is a basic component of a battery pack, the battery module is formed by connecting a plurality of single batteries in series and parallel, and in the prior art, current carrying sheets are connected with the positive electrode and the negative electrode of the battery in a resistance welding or laser welding mode to realize series and parallel connection of the batteries. However, when one of the batteries in the battery module is in a problem, the whole module is easily scrapped, the gradient utilization and recovery of the batteries are affected, and the cost is increased. Therefore, the utility model provides the lithium battery cover plate assembly and the lithium battery, so that the problem that the battery module is easy to be scrapped as a whole due to single battery faults is solved, the realization of gradient utilization and recovery of the battery is facilitated, and the cost is reduced.
The lithium battery cover plate assembly and the lithium battery of the present utility model are described below with reference to fig. 1 to 3.
Referring to fig. 1 and 2, a lithium battery cap plate assembly includes a rivet 1, and a screw terminal 2, a first insulation pad 3, a cap plate 4, a second insulation pad 5, and a current collecting tray 6, which are sequentially connected through the rivet 1; wherein the threaded terminal 2 is provided with a threaded structure; the threaded terminal 2 is electrically insulated from the cap plate 4 by a first insulating pad 3; the cover plate 4 is electrically insulated from the current collecting plate 6 by a second insulating pad 5; rivet 1 is electrically insulated from cap plate 4 and electrically connected to threaded terminal 2.
In practical application, the threaded terminal 2, the first insulating pad 3, the cover plate 4, the second insulating pad 5 and the current collecting plate 6 are connected into a whole through the rivet 1 so as to ensure the connection stability of the threaded terminal 2. When the battery is assembled, the current collecting disc 6 is welded with a winding core in the battery shell, the current is led out, the cover plate 4 is covered and fixed on the battery shell, the battery is packaged, the threaded terminal 2 is electrically connected with the current collecting disc 6 through the rivet 1, and the threaded terminal 2 can be used as an electrode of the battery. The screw terminal 2 is electrically insulated from the cap plate 4 by the first insulating pad 3, and the current collecting plate 6 is electrically insulated from the cap plate 4 by the second insulating pad 5 to avoid the problem of short circuit. When the battery module is assembled, the battery can be fixed on the module in a mode similar to bolt fixing, so that the rapid installation and disassembly of the battery are realized, and the assembly efficiency of the battery module is improved. When a single battery fails, the failed battery can be detached and replaced by a new battery, so that the problem that the battery module is easy to be scrapped as a whole due to the failure of the single battery is solved, the gradient utilization and recovery of the battery are facilitated, and the cost is reduced.
At least one rivet 1 is arranged, the specific number of the rivets can be selected according to actual requirements, and the threaded terminal 2, the first insulating pad 3, the cover plate 4, the second insulating pad 5 and the current collecting disc 6 are only required to be stably connected together. When the rivet 1 is provided with one, the rivet 1 can be positioned at the central axis of the lithium battery cover plate component; when the rivet 1 has more than one, the rivet 1 can be uniformly distributed around the central axis of the lithium battery cover plate assembly. In this embodiment, a specific structure of a lithium battery cover plate assembly will be described by taking three rivets 1 as an example.
Referring to fig. 2 and 3, the cover plate 4 has a disk shape, and is made of aluminum or other metal materials. Three communication holes 40 are arranged on the cover plate 4 around the circle center. The second insulating pad 5 is provided with a second rivet hole 50, and the position of the second rivet hole 50 corresponds to the position of the communication hole 40; the second insulating pad 5 is provided with the insulating ring 7 that is used for supplying rivet 1 to pass towards protruding on the one side of apron 4, insulating ring 7 integrated into one piece is on second insulating pad 5 and encircle second rivet hole 50 setting, and the external diameter of insulating ring 7 is not greater than the diameter of intercommunicating pore 40, and after the apron 4 was located to the second insulating pad 5 pad, insulating ring 7 worn to locate in intercommunicating pore 40 to the inner wall electricity to rivet 1 and intercommunicating pore 40 is isolated. Specifically, the outer diameter of the insulating ring 7 is adapted to the communication hole 40, and when the insulating ring 7 is inserted into the communication hole 40, the outer wall of the insulating ring is abutted against the inner wall of the communication hole 40.
The first insulating pad 3 is provided with a first rivet hole 30, the position of the first rivet hole 30 corresponds to the position of the communication hole 40, and the diameter of the first rivet hole 30 is smaller than the outer diameter of the insulating ring 7. After the insulating ring 7 passes through the communication hole 40, the end face of the insulating ring is abutted against the first insulating ring 7 to improve the insulating effect.
In another embodiment, the insulating ring 7 may also be disposed on the first insulating pad 3, and correspondingly, after the insulating ring 7 passes through the communication hole 40, an end surface of the insulating ring abuts against the second insulating pad 5. In addition, the insulating ring 7 and the first insulating pad 3 or the second insulating pad 5 may be connected separately, so that the insulating ring 7 may electrically isolate the rivet 1 from the inner wall of the communication hole 40.
The threaded terminal 2 is provided with a third rivet hole 20 around the center of the circle, the position of the third rivet hole 20 corresponds to the position of the communication hole 40, and the current collecting plate 6 is provided with a fourth rivet hole 60 corresponding to the communication hole 40. The rivet 1 can be made of aluminum, copper or other metal materials, one end of the rivet 1 is provided with a big end 10, the big end 10 of the rivet 1 is abutted against one surface of the current collecting disc 6, which is away from the second insulating pad 5, the other end of the rivet 1 is embedded into the third rivet hole 20, a certain compression allowance can be generated between the first insulating pad 3 and the second insulating pad 5, and when a press is used for applying pressure to the threaded terminal 2, the rivet 1 can be deformed to rivet and fix the threaded terminal 2.
The threaded terminal 2 can be made of copper, aluminum or other metal materials, the outer peripheral surface of the threaded terminal is provided with a threaded structure, the diameter of the threaded terminal 2 can be slightly larger than that of the cover plate 4 or slightly smaller than that of the cover plate 4, and the threaded terminal 2 and the cover plate can be electrically isolated through the first insulating pad 3; in this embodiment, one of the screw terminals 2 is larger than the cover plate 4 and the other is smaller than the cover plate 4, so that the battery can be screwed in from one side of the module, and the battery can be assembled and disassembled conveniently.
A flag groove 21 is provided on the side of the threaded terminal 2 facing away from the first insulating pad 3 for distinguishing between the positive and negative poles of the battery. Specifically, when the screw terminal 2 is the positive electrode of the battery, the sign groove 21 is in a cross shape; when the screw terminal 2 is the negative electrode of the battery, the sign groove 21 is in a straight shape. Besides distinguishing the positive electrode and the negative electrode of the battery, the sign groove 21 can be matched with a cross or straight screwdriver, so that the battery can be conveniently assembled and disassembled.
In one embodiment, when the threaded terminal 2 is used as the positive electrode of the battery, the cover plate 4 is provided with a liquid injection hole 41 for communicating with the inner cavity of the battery, correspondingly, the first insulating pad 3 is provided with a first through hole 31, the first through hole 31 corresponds to the position of the liquid injection hole 41, the threaded terminal 2 is provided with a second through hole 22, and the second through hole 22 corresponds to the position of the first through hole 31, so that the staff can inject electrolyte into the battery through the liquid injection hole 41.
In another embodiment, when the threaded terminal 2 is used as the negative electrode of the battery, the explosion-proof valve 42 is disposed on the cover plate 4, and correspondingly, the first through hole 31 is disposed on the first insulating pad 3, the first through hole 31 corresponds to the position of the explosion-proof valve 42, and the second through hole 22 is disposed on the threaded terminal 2, and the second through hole 22 corresponds to the position of the first through hole 31, so that when the internal pressure of the battery is too high, the pressure can be relieved through the explosion-proof valve 42. The lithium battery explosion-proof valve 42 is a prior art, and is not a major improvement of the present utility model, and the structure thereof will not be described again.
Referring to fig. 2 and 3, the current collecting tray 6 includes a first connection portion 61 and a second connection portion 62; the first connecting portion 61 corresponds to the second insulating pad 5, and the fourth rivet hole 60 is disposed on the first connecting portion 61. The second connecting portion 62 extends to outside the second insulating pad 5, a plurality of grooves 620 are formed in the face, facing the second insulating pad 5, of the second connecting portion 62, the grooves 620 are arranged around the center of the second connecting portion 62, the grooves 620 are formed by stamping, so that boss-shaped welding areas are formed on the face, facing away from the second insulating pad 5, of the second connecting portion 62 while the grooves 620 are formed, and when the battery is packaged, the boss-shaped welding areas are in contact with the winding core, so that the contact effect and the contact area of the welding areas and the winding core are improved, and better welding effect is guaranteed.
Specifically, when the current collecting plate 6 is a positive current collecting plate of a battery, it may be made of an aluminum material; when the current collecting plate 6 is a negative current collecting plate of a battery, the current collecting plate can be made of copper nickel plating or nickel material.
Specifically, the materials of the first insulating pad 3 and the second insulating pad 5 may be selected according to actual requirements, for example, polypropylene or other organic polymer materials, but it is required to ensure that the first insulating pad 3 and the second insulating pad 5 perform an insulating function and generate a certain compression deformation.
The lithium battery provided by the utility model is described below, and the lithium battery described below and the lithium battery cover plate assembly described above can be correspondingly referred to each other.
A lithium battery comprises a shell, a winding core and the lithium battery cover plate component; the winding core is arranged in the shell; the protrusions on the second connection portion 62 are in contact with the electrode of the winding core and are welded by laser; the cover plate 4 and the shell are fixed by laser welding.
The innovation point of the utility model is that: in practical application, the threaded terminal 2, the first insulating pad 3, the cover plate 4, the second insulating pad 5 and the current collecting plate 6 are connected into a whole through the rivet 1 so as to ensure the connection stability of the threaded terminal 2. When the battery is assembled, the current collecting disc 6 is welded with a winding core in the battery shell and used for leading out current, the cover plate 4 is fixed with the battery shell and used for packaging the battery, and the threaded terminal 2 is electrically connected with the current collecting disc 6 through the rivet 1, so that the threaded terminal 2 can be used as an electrode of the battery. The screw terminal 2 is electrically insulated from the cap plate 4 by the first insulating pad 3, and the current collecting plate 6 is electrically insulated from the cap plate 4 by the second insulating pad 5 to avoid the problem of short circuit. When the battery module is assembled, the battery can be fixed on the module in a mode similar to bolt fixing, so that the quick installation and disassembly of the battery are realized, and the assembly efficiency of the battery module is improved. When a single battery fails, the failed battery can be detached and replaced by a new battery, so that the problem that the battery module is easy to be scrapped as a whole due to the failure of the single battery is solved, the gradient utilization and recovery of the battery are facilitated, and the cost is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A lithium battery cover plate assembly, comprising:
a rivet (1), and a threaded terminal (2), a first insulating pad (3), a cover plate (4), a second insulating pad (5) and a current collecting disc (6) which are sequentially connected through the rivet (1);
the threaded terminal (2) is electrically insulated from the cover plate (4) by the first insulating pad (3);
the cover plate (4) is electrically insulated from the current collecting plate (6) by the second insulating pad (5);
the rivet (1) is electrically insulated from the cover plate (4) and is electrically connected to the threaded terminal (2).
2. The lithium battery cover plate assembly according to claim 1, wherein a communication hole (40) is formed in the cover plate (4), an insulating ring (7) is arranged in the communication hole (40) in a penetrating mode, and the rivet (1) is arranged in the insulating ring (7) in a penetrating mode.
3. The lithium battery cover plate assembly according to claim 2, characterized in that the insulating ring (7) is integrally formed to the first insulating pad (3) or the second insulating pad (5).
4. Lithium battery cover plate assembly according to claim 1, characterized in that the rivet (1) is provided with at least one.
5. Lithium battery cover plate assembly according to claim 1, characterized in that the threaded terminal (2) is provided with a "one" or "cross" shaped logo groove (21) on the side facing away from the cover plate (4).
6. The lithium battery cover plate assembly according to claim 1, characterized in that the current collecting plate (6) comprises a first connection portion (61) and a second connection portion (62); the first connecting part (61) corresponds to the second insulating pad (5) and is used for allowing the rivet (1) to pass through; the second connecting part (62) extends to the outside of the second insulating pad (5), and a plurality of boss-shaped welding areas are formed on one surface of the second connecting part (62) which faces away from the second insulating pad (5).
7. The lithium battery cover plate assembly according to claim 6, wherein a plurality of grooves (620) are arranged on a surface of the second connecting portion (62) facing the second insulating pad (5), and the plurality of grooves (620) are arranged around the center of the second connecting portion (62); the groove (620) is formed by stamping, so that the welding area is formed on the surface, which is away from the second insulating pad (5), of the second connecting portion (62).
8. The lithium battery cover plate assembly according to any one of claims 1-7, characterized in that the cover plate (4) is provided with a liquid injection hole (41) for communicating with the inner cavity of the battery; the first insulating pad (3) is provided with a first through hole (31), the threaded terminal (2) is provided with a second through hole (22), and the positions of the first through hole (31) and the second through hole (22) correspond to the positions of the liquid injection holes (41).
9. The lithium battery cover plate assembly according to any one of claims 1-7, wherein an explosion-proof valve (42) is arranged on the cover plate (4), a first through hole (31) is arranged on the first insulating pad (3), a second through hole (22) is arranged on the threaded terminal (2), and the positions of the first through hole (31) and the second through hole (22) correspond to the position of the explosion-proof valve (42).
10. A lithium battery comprising a lithium battery cover plate assembly according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223313258.6U CN218997026U (en) | 2022-12-09 | 2022-12-09 | Lithium battery cover plate assembly and lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223313258.6U CN218997026U (en) | 2022-12-09 | 2022-12-09 | Lithium battery cover plate assembly and lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218997026U true CN218997026U (en) | 2023-05-09 |
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ID=86196508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223313258.6U Active CN218997026U (en) | 2022-12-09 | 2022-12-09 | Lithium battery cover plate assembly and lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218997026U (en) |
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2022
- 2022-12-09 CN CN202223313258.6U patent/CN218997026U/en active Active
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