CN216958260U - Power battery top cover structure - Google Patents
Power battery top cover structure Download PDFInfo
- Publication number
- CN216958260U CN216958260U CN202220388820.2U CN202220388820U CN216958260U CN 216958260 U CN216958260 U CN 216958260U CN 202220388820 U CN202220388820 U CN 202220388820U CN 216958260 U CN216958260 U CN 216958260U
- Authority
- CN
- China
- Prior art keywords
- pole
- post
- assembly
- column
- top cover
- 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.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The application relates to a top cover structure of a power battery, which comprises a top cover plate, a first pole column assembly, a second pole column assembly, a lower plastic sheet, a first connecting sheet and a second connecting sheet; a first pole post hole and a second pole post hole are symmetrically formed in two ends of the top cover plate, the first pole post assembly is arranged in the first pole post hole, and the second pole post assembly is arranged in the second pole post hole; a first round hole and a second round hole are symmetrically formed in two ends of the lower plastic sheet, the first round hole is arranged corresponding to the first pole column hole, and the second round hole is arranged corresponding to the second pole column hole; the first connecting piece is arranged on one side, away from the top cover piece, of the first round hole, and the first pole component is connected with the first connecting piece; the second connecting piece is arranged on one side, away from the top cover plate, of the second round hole, and the second pole column assembly is connected with the second connecting piece. This application simple structure, the leakproofness is good, and the cost is lower.
Description
Technical Field
The utility model relates to the technical field of power batteries, in particular to a top cover structure of a power battery.
Background
With the development of science and technology, lithium batteries are attracting more and more attention as an energy device and are widely applied to the fields of mobile phones, electric automobiles, electric tools and the like.
The lithium ion battery has various top cover pole column structures, a top cover pole column is integrally arranged, and the pole column is independently arranged as a component and then welded on the top cover sheet to form a complete top cover structure. However, in the existing lithium battery top cap pole structure, the negative pole of the existing lithium battery is partially made of oxygen-free red copper, and is partially made by welding a copper sheet on an aluminum column in a friction welding manner and then processing the aluminum column to a qualified size. No matter which mode is adopted, the cost is higher, and the top cover structure is complex and lacks the cost advantage. At present, also there is the utmost point post of preparation through the stamping workpiece, but, mould plastics from the outside at top cap utmost point post position, utilize the anti-shear force of moulding plastics to fix utmost point post, its stopping mainly relies on the anti-shear force of moulding plastics to fix utmost point post for the stretching resistance of utmost point post is less, hardly reaches the standard requirement of test, and the leakproofness is relatively poor, also influences the stability in use of lithium cell easily.
SUMMERY OF THE UTILITY MODEL
Based on the structure, the utility model provides a top cover structure of a power battery, and aims to solve the problems of complex top cover structure, high cost, poor sealing performance and the like of the power battery. This application adopts the utmost point post of independent setting, simple structure, and the leakproofness is good, and the cost is lower, has better reliability moreover, can regard as the general purpose article to produce and use.
In order to achieve the purpose, the utility model provides the following technical scheme:
a top cover structure of a power battery is used for a square shell battery and comprises a top cover plate, a first pole column assembly, a second pole column assembly, a lower plastic sheet, a first connecting sheet and a second connecting sheet;
a first pole post hole and a second pole post hole are symmetrically formed in two ends of the top cover plate, the first pole post assembly is arranged in the first pole post hole, and the second pole post assembly is arranged in the second pole post hole;
a first round hole and a second round hole are symmetrically formed in two ends of the lower plastic sheet, the first round hole is arranged corresponding to the first pole column hole, and the second round hole is arranged corresponding to the second pole column hole;
the first connecting sheet is arranged on one side, away from the top cover plate, of the first round hole, and the first pole post assembly is connected with the first connecting sheet; the second connecting piece is arranged on one side, away from the top cover plate, of the second round hole, and the second pole column assembly is connected with the second connecting piece;
and one side of the lower plastic sheet close to the top cover sheet is abutted with the top cover sheet.
Further, the first pole post assembly comprises first pole post upper injection plastic, a first pole post sleeve, a first pole post and first pole post lower injection plastic; the first pole post sleeve is sleeved on the first pole post, the first pole post is arranged on the first pole post lower injection molding compound, and the first pole post lower injection molding compound is arranged in the first pole post hole; the upper injection plastic of the first pole is sleeved on the first pole sleeve and is abutted against the lower injection plastic of the first pole; the first pole is close to one end of the lower plastic sheet and connected with the first connecting sheet.
Further, the second pole column assembly comprises second pole column upper injection molding glue, a second pole column sleeve, a second pole column and second pole column lower injection molding glue; the second pole column is sleeved on the second pole column, the second pole column is arranged on the injection molding glue under the second pole column, and the injection molding glue under the second pole column is arranged in the second pole column hole; the second pole column upper injection molding glue is sleeved on the second pole column sleeve, and the second pole column upper injection molding glue is abutted with the second pole column lower injection molding plastic; and one end of the second polar column close to the lower plastic piece is connected with the second connecting piece.
Further, the first pole post assembly further comprises a first sealing ring sleeved on the first pole post, and the first pole post sleeve is sleeved on the first sealing ring.
Furthermore, the second pole column assembly further comprises a second sealing ring sleeved on the second pole column, and the second pole column is sleeved on the second sealing ring.
Further, the first pole is a pole formed by punching and molding an aluminum coil; the second pole is a pole formed by stamping copper-aluminum coil materials.
Further, the first pole post assembly is welded in the first pole post hole through laser, and the second pole post assembly is welded in the second pole post hole through laser.
Further, the first pole post assembly is a positive pole post assembly, and the second pole post assembly is a negative pole post assembly.
Further, the first connecting piece is a positive connecting piece, and the second connecting piece is a negative connecting piece. Further, the power battery top cover structure further comprises an explosion-proof valve arranged between the first pole post assembly and the second pole post assembly.
Further, the prismatic case battery includes a lithium battery and a sodium battery.
The utility model achieves the following beneficial effects: the pole assembly is simple in structure, the pole assembly is sleeved layer by layer from inside to outside, and the pole is sleeved by the pole sleeve, so that the tensile resistance of the pole is well improved, and the structure can be applied to occasions or products which are generated by vibration, such as new energy automobiles and the like. In addition, independent setting between the utmost point post of this application and the top cap piece, under the condition of the utmost point post that uses same model, can switch the top cap production of different models, greatly reduced the development cost of different specification top caps and shortened development time. In the structure of the application, the plastic anti-withdrawal pole is poured under the pole, so that the tensile resistance of the pole is further improved; the pole compression sealing ring has good sealing performance and reliability, and can be used as a general product for production and use.
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 following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is an exploded schematic view of a top cover structure of a power battery according to an embodiment of the utility model;
FIG. 2 is a schematic diagram of a longitudinal (i.e., a longitudinal direction of a top cover sheet) cross-sectional structure of the top cover structure of the power battery in FIG. 1;
FIG. 3 is an enlarged schematic view of FIG. 2 at A;
fig. 4 is an enlarged schematic view of fig. 2 at B.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, top and bottom … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
It will be understood that when an element is referred to as being "secured to" or "disposed on" 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.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In the existing lithium battery top cap pole structure, the negative pole of the existing lithium battery adopts oxygen-free red copper completely, and the existing lithium battery top cap pole structure adopts a friction welding mode to weld a copper sheet on an aluminum column and then processes the aluminum column to a qualified size. No matter which mode is adopted, the cost is higher, and the top cover structure is complex and lacks the cost advantage. At present, also there is the utmost point post of preparation through the stamping workpiece, but, mould plastics from the outside at top cap utmost point post position, utilize the anti-shear force of moulding plastics to fix utmost point post, its stopping mainly relies on the anti-shear force of moulding plastics to fix utmost point post for the stretching resistance of utmost point post is less, hardly reaches the standard requirement of test, and the leakproofness is relatively poor, also influences the stability in use of lithium cell easily. Based on this, the utility model provides a top cover structure of a power battery to solve the above technical problems.
Specifically, as shown in fig. 1 to 2, an embodiment of the present invention provides a top cover structure of a power battery, which is used for a square casing battery, and includes a top cover plate 10, a first pole assembly 20, a second pole assembly 30, a lower plastic sheet 40, a first connecting sheet 50, and a second connecting sheet 60;
a first pole post hole 11 and a second pole post hole 12 are symmetrically formed in two ends of the top cover plate 10, the first pole post assembly 20 is arranged in the first pole post hole 11, and the second pole post assembly 30 is arranged in the second pole post hole 12;
a first circular hole 41 and a second circular hole 42 are symmetrically formed at two ends of the lower plastic sheet 40, the first circular hole 41 is arranged corresponding to the first pole column hole 11, and the second circular hole 42 is arranged corresponding to the second pole column hole 12;
the first connecting plate 50 is disposed on a side of the first circular hole 41 away from the top cover plate 10, and the first pole assembly 20 is connected with the first connecting plate 50; the second connecting piece 60 is arranged on one side of the second round hole 42 far away from the top cover plate 10, and the second pole column assembly 30 is connected with the second connecting piece 60;
one side of the lower plastic sheet 40 close to the top cover sheet 10 is abutted with the top cover sheet 10.
Further, referring to fig. 2-3, the first pole assembly 20 includes a first pole upper injection plastic 21, a first pole sleeve 22, a first pole 23, and a first pole lower injection plastic 24; the first pole column sleeve 22 is sleeved on the first pole column 23, the first pole column 23 is arranged on the first pole column lower injection plastic 24, and the first pole column lower injection plastic 24 is arranged in the first pole column hole 11; the first pole upper injection plastic sleeve 21 is arranged on the first pole sleeve 22, and the first pole upper injection plastic 21 is abutted with the first pole lower injection plastic 24; one end of the first pole 23 close to the lower plastic sheet 40 is connected to the first connecting sheet 50.
Further, referring to fig. 2 and fig. 4, the second pole assembly 30 includes a second pole upper injection plastic 31, a second pole sleeve 32, a second pole 33, and a second pole lower injection plastic 34; the second pole post sleeve 32 is sleeved on the second pole post 33, the second pole post 33 is arranged on the second pole post lower injection plastic 34, and the second pole post lower injection plastic 34 is arranged in the second pole post hole 12; the second pole column upper injection plastic sleeve 31 is arranged on the second pole column sleeve 32, and the second pole column upper injection plastic 31 is abutted with the second pole column lower injection plastic 34; one end of the second pole column 33 close to the lower plastic sheet 40 is connected with the second connecting sheet 60.
Further, the first pole post assembly 20 further includes a first sealing ring 25 sleeved on the first pole post 23, and the first pole post sleeve 22 is sleeved on the first sealing ring 25.
Further, the second pole post assembly 30 further includes a second sealing ring 35 sleeved on the second pole post 33, and the second pole post sleeve 32 is sleeved on the second sealing ring 35.
Further, the first terminal 23 is a terminal formed by punching an aluminum coil; the second terminal post 33 is a terminal post formed by stamping a copper-aluminum coil material.
Further, the first pole assembly 20 is laser welded into the first pole bore 11, and the second pole assembly 30 is laser welded into the second pole bore 12.
Further, the first pole assembly 20 is a positive pole assembly, and the second pole assembly 30 is a negative pole assembly.
Further, the first connecting piece 50 is a positive connecting piece, and the second connecting piece 60 is a negative connecting piece.
Further, the power battery top cover structure further comprises an explosion-proof valve 70 disposed between the first pole assembly 20 and the second pole assembly 30.
Further, the prismatic case battery includes a lithium battery and a sodium battery.
The pole assembly is simple in structure, the pole assembly is sleeved layer by layer from inside to outside, and the pole is sleeved by the pole sleeve, so that the tensile resistance of the pole is well improved, and the structure can be applied to occasions or products which are generated by vibration, such as new energy automobiles and the like. In addition, independently set up between utmost point post of this application and the top cap piece, under the condition of the utmost point post that uses same model, can switch the top cap production of different models, greatly reduced the development cost of different specification top caps and shortened development time. In the structure of the application, the plastic anti-withdrawal pole is poured under the pole, so that the tensile resistance of the pole is further improved, and the requirements of various tests can be met; the pole compression sealing ring has good sealing performance and reliability, and can be used as a general product for production and use.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A top cover structure of a power battery is used for a square shell battery and is characterized by comprising a top cover plate, a first pole column assembly, a second pole column assembly, a lower plastic sheet, a first connecting sheet and a second connecting sheet;
a first pole post hole and a second pole post hole are symmetrically formed in two ends of the top cover plate, the first pole post assembly is arranged in the first pole post hole, and the second pole post assembly is arranged in the second pole post hole;
a first round hole and a second round hole are symmetrically formed in two ends of the lower plastic sheet, the first round hole is arranged corresponding to the first pole column hole, and the second round hole is arranged corresponding to the second pole column hole;
the first connecting piece is arranged on one side, away from the top cover piece, of the first round hole, and the first pole component is connected with the first connecting piece; the second connecting piece is arranged on one side, away from the top cover piece, of the second round hole, and the second pole column assembly is connected with the second connecting piece;
one side of the lower plastic sheet close to the top cover sheet is abutted with the top cover sheet.
2. The power battery top cover structure according to claim 1, wherein the first pole post assembly comprises a first pole post upper injection plastic, a first pole post sleeve, a first pole post and a first pole post lower injection plastic; the first pole post sleeve is sleeved on the first pole post, the first pole post is arranged on the first pole post lower injection molding compound, and the first pole post lower injection molding compound is arranged in the first pole post hole; the upper injection plastic of the first pole is sleeved on the first pole sleeve and is abutted against the lower injection plastic of the first pole; the first pole is close to one end of the lower plastic sheet and connected with the first connecting sheet.
3. The power cell top cap structure of claim 2, wherein the second pole post assembly comprises a second pole post upper injection molding compound, a second pole post sleeve, a second pole post and a second pole post lower injection molding compound; the second pole column is sleeved on the second pole column, the second pole column is arranged on the injection molding glue under the second pole column, and the injection molding glue under the second pole column is arranged in the second pole column hole; the second pole column upper injection molding glue is sleeved on the second pole column sleeve, and the second pole column upper injection molding glue is abutted with the second pole column lower injection molding plastic; one end of the second pole column, which is close to the lower plastic sheet, is connected with the second connecting sheet.
4. The power battery top cap structure of claim 3, wherein the first pole assembly further comprises a first sealing ring sleeved on the first pole, and the first pole is sleeved on the first sealing ring.
5. The top cap structure of claim 4, wherein the second pole assembly further comprises a second sealing ring sleeved on the second pole, and the second pole is sleeved on the second sealing ring.
6. The power battery top cover structure according to claim 5, wherein the first pole is a pole formed by aluminum coil material through stamping forming; the second pole is a pole formed by stamping copper-aluminum coil materials.
7. The power cell header structure of claim 6, wherein the first pole assembly is laser welded within the first pole aperture and the second pole assembly is laser welded within the second pole aperture.
8. The power cell header structure of claim 7, wherein the first pole assembly is a positive pole assembly and the second pole assembly is a negative pole assembly.
9. The top cap structure of claim 8, wherein the first connecting tab is a positive connecting tab and the second connecting tab is a negative connecting tab.
10. The power cell header structure of claim 1, further comprising an explosion-proof valve disposed between the first and second pole assemblies; the square case battery includes a lithium battery and a sodium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220388820.2U CN216958260U (en) | 2022-02-25 | 2022-02-25 | Power battery top cover structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220388820.2U CN216958260U (en) | 2022-02-25 | 2022-02-25 | Power battery top cover structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216958260U true CN216958260U (en) | 2022-07-12 |
Family
ID=82291239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220388820.2U Active CN216958260U (en) | 2022-02-25 | 2022-02-25 | Power battery top cover structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216958260U (en) |
-
2022
- 2022-02-25 CN CN202220388820.2U patent/CN216958260U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100913838B1 (en) | Battery Module of Novel Structure | |
| US20080213657A1 (en) | High Capacity Lithium Ion Secondary Battery with Metal Case | |
| EP2953186B1 (en) | Electricity storage device | |
| CN217606923U (en) | Power battery top cover structure | |
| CN218648037U (en) | Power battery top cover structure | |
| CN114447413A (en) | Battery cover plate and battery | |
| CN216958260U (en) | Power battery top cover structure | |
| CN218586142U (en) | Power battery top cover structure | |
| CN217589174U (en) | Power battery top cover positive electrode structure and power battery top cover | |
| JPH1070053A (en) | Rectangular electrochemical element and manufacture thereof | |
| CN211045494U (en) | Battery top cap insulation system | |
| CN219144315U (en) | Top cover assembly and power battery | |
| CN217934003U (en) | Power battery top cover structure | |
| CN201877530U (en) | Lithium ion power battery with bidirectional current collectors | |
| CN212648339U (en) | Lithium ion battery | |
| CN219393545U (en) | Top cover structure of power battery | |
| JP2011216396A (en) | Square secondary battery | |
| CN111276647A (en) | Battery, battery module and preparation method of battery | |
| CN218498327U (en) | Power battery structure with insulativity | |
| CN219677514U (en) | Square battery structure | |
| CN115986281A (en) | Power battery top cover structure | |
| CN219779052U (en) | Battery cell | |
| CN216354471U (en) | Power battery apron of simply moulding plastics | |
| CN218648042U (en) | Power battery structure | |
| CN218160609U (en) | Power battery cover plate structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |