CN115986281A - Power battery top cover structure - Google Patents
Power battery top cover structure Download PDFInfo
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- CN115986281A CN115986281A CN202211691020.9A CN202211691020A CN115986281A CN 115986281 A CN115986281 A CN 115986281A CN 202211691020 A CN202211691020 A CN 202211691020A CN 115986281 A CN115986281 A CN 115986281A
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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 application relates to a top cover structure of a power battery, which comprises a top cover plate, a positive pole column assembly, a negative pole column assembly and a lower plastic sheet; the top cover plate is arranged on the lower plastic sheet and is abutted against the lower plastic sheet; both ends of the top cover plate are provided with a positive pole column hole and a negative pole column hole; the positive pole component is arranged in the positive pole hole; the negative pole post assembly is arranged in the negative pole post hole; a first hole and a second hole are formed in two ends of the lower plastic sheet, the first hole is arranged corresponding to the positive pole column hole, and the second hole is arranged corresponding to the negative pole column hole; a first reverse buckle is arranged around the periphery of the first hole close to the top cover plate, and the first reverse buckle is sleeved in the positive pole hole; the periphery of the second hole close to the top cover plate is surrounded and provided with a second reverse buckle, and the second reverse buckle is sleeved in the negative pole hole. The novel LED lamp is simple in structure, good in reliability and low in cost, and can be produced and used as a universal product.
Description
Technical Field
The invention 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, power 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 power battery has various structural forms of the top cover pole, the top cover pole is integrally arranged, and the pole is independently arranged as an assembly and then welded on the top cover sheet to form a complete top cover structure. At present, in the existing power battery top cover pole structure, a copper sheet is welded on an aluminum column in a friction welding mode, and then the copper sheet is machined to form a negative pole; the positive electrode is processed by a cold heading machine, injection molding PPS plastic is adopted in the assembling stage to prevent the polar pole from falling off and forming, and the performance is good. However, the top cover structure with more applications has complex processing technology and high cost, and the top cover structure is complex and lacks cost advantage.
Disclosure of Invention
Based on the above, the invention provides a top cover structure of a power battery, and aims to solve the problems of complex structure, high cost, complex processing technology and the like of the top cover of the power battery. Compared with the similar products in the market, the novel electric heating furnace has the advantages of simple structure, reliable performance, lower cost and obvious cost advantage, and can be used as a general product for production and use.
In order to achieve the above purpose, the embodiment of the present invention proposes the following technical solutions:
a top cover structure of a power battery is used for a square shell battery and comprises a top cover plate, a positive pole column assembly, a negative pole column assembly and a lower plastic sheet; the top cover sheet is arranged on the lower plastic sheet and is abutted against the lower plastic sheet;
the two ends of the top cover plate are provided with a positive pole column hole and a negative pole column hole; the positive post component is arranged in the positive post hole; the negative pole post assembly is arranged in the negative pole post hole;
a first hole and a second hole are formed in two ends of the lower plastic sheet, the first hole is arranged corresponding to the positive pole column hole, and the second hole is arranged corresponding to the negative pole column hole; a first reverse buckle is arranged around the periphery of the first hole close to the top cover plate, and the first reverse buckle is sleeved in the positive pole hole; the periphery of the second hole close to the top cover plate is surrounded and provided with a second reverse buckle, and the second reverse buckle is sleeved in the negative pole hole.
As a preferred embodiment, the positive pole assembly comprises a positive pole, a positive pole sealing ring, a positive pole encapsulation and a positive pole lower bracket; the positive post is arranged in the positive post hole; the positive sealing ring is sleeved at the bottom of the positive post; the positive pole encapsulation is sleeved on the periphery of the bottom of the positive pole, and the positive pole encapsulation is respectively abutted against the positive pole sealing ring and the positive pole lower support; the positive lower support is sleeved outside the first reverse buckle and connected with the first reverse buckle in an abutting mode. Through anodal lower carriage, can be fine support anodal post rubber coating, and then effectively prevent that anodal post from droing.
In a preferred embodiment, a positive boss is circumferentially arranged on the periphery of the positive post hole away from the lower plastic piece, a positive plastic is arranged on the periphery of the positive boss, and the positive plastic is abutted against the positive post; the plastic on the positive electrode is arranged on the periphery of the positive electrode boss in an injection molding or back-off mode.
As a preferred embodiment, the positive pole encapsulation is sleeved on the periphery of the bottom of the positive pole in an injection molding manner.
In a preferred embodiment, the positive electrode post is a post obtained by integral punching.
In a preferred embodiment, the negative pole assembly comprises a negative pole, a negative pole sealing ring, a negative pole encapsulation and a negative pole lower support; the negative pole is arranged in the negative pole hole; the negative electrode sealing ring is sleeved at the bottom of the negative electrode column; the negative pole column rubber coating is sleeved on the periphery of the bottom of the negative pole column, and the negative pole column rubber coating is respectively abutted with the negative pole sealing ring and the negative pole lower support; the negative pole lower bracket is sleeved on the outer side of the second reverse buckle, and the negative pole lower bracket is connected with the second reverse buckle in an abutting mode. Through the negative pole lower carriage, can be fine support the encapsulation of negative pole post, and then effectively prevent that the negative pole post from droing.
As a preferred embodiment, a negative boss is circumferentially arranged on the periphery of the negative post hole away from the lower plastic sheet, a negative upper plastic is arranged on the periphery of the negative boss, and the negative upper plastic is abutted to the negative post; the plastic on the negative electrode is arranged on the periphery of the negative electrode boss in an injection molding or back-off mode.
In a preferred embodiment, the negative electrode pillar is coated with the rubber and sleeved on the periphery of the bottom of the negative electrode pillar in an injection molding manner.
In a preferred embodiment, the negative electrode post is a post integrally punched from a copper-aluminum composite material. In the application, the pole parts are all formed by stamping, the processing technology is simple, the preparation efficiency is high, the material cost is low, and the obvious cost advantage is achieved.
In a preferred embodiment, an explosion-proof valve hole is arranged between the positive pole column hole and the negative pole column hole, and an explosion-proof valve assembly is arranged in the explosion-proof hole.
As a preferred embodiment, the explosion-proof valve assembly comprises an explosion-proof valve and an explosion-proof valve protection patch, the explosion-proof valve is arranged in the explosion-proof valve hole, and the explosion-proof valve protection patch is arranged on the side face, far away from the lower plastic sheet, of the explosion-proof valve.
As a preferred embodiment, the lower plastic sheet is further provided with a plurality of strip-shaped holes, the strip-shaped holes are arranged in parallel, and the strip-shaped holes are arranged corresponding to the explosion-proof valve holes.
In a preferred embodiment, the positive electrode post and the negative electrode post are square, elliptical, or cylindrical posts.
In a preferred embodiment, the prismatic case battery is a lithium battery or a sodium battery.
The invention achieves the following beneficial effects: according to the invention, the lower support of the anode and the lower support of the cathode are arranged, so that the lower support can well support the pole for encapsulation, and the pole is effectively prevented from falling off. The positive pole is integrally formed by punching and then welded in the positive pole hole by laser, so that the sealing property and the reliability of the positive pole can be well ensured; through setting up plastic, rubber coating, lower carriage and sealing washer, guarantee the leakproofness and the insulating nature of utmost point post. In addition, the pole part is formed by stamping, the preparation efficiency is high, and the material cost is low. The application has the advantages of simple structure, good sealing performance and reliability and lower cost, and can be produced and used as a universal product.
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 invention;
fig. 2 is a schematic cross-sectional view of the top cover structure of the power battery in fig. 1 in the longitudinal direction (from the positive pole assembly to the negative pole assembly);
fig. 3 is an enlarged schematic view of fig. 2 at a.
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 described clearly and completely 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 upper, lower, left, right, front, back, top, bottom, 8230; etc.) are involved in the embodiments of the present invention, the directional indications are only used for explaining the relative positional relationship, movement, etc. of the components in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are correspondingly changed.
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 appropriate.
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 of "first", "second", etc. in an embodiment 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 implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the 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 power battery top cap pole structure, a copper sheet is welded on an aluminum column by a friction welding mode and then the copper sheet is formed by machining a negative pole; the positive electrode is processed by a cold heading machine, injection molding PPS plastic is adopted in the assembling stage to prevent the polar pole from falling off and forming, and the performance is good. However, the top cover structure with more applications has complex processing technology and high cost, and the top cover structure is complex and lacks cost advantage. Based on this, the invention provides a top cover structure of a power battery to solve the above technical problems.
Specifically, as shown in fig. 1 to 3, 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 positive post assembly 20, a negative post assembly 30, and a lower plastic sheet 40; the top cover sheet 10 is arranged on the lower plastic sheet 40, and the top cover sheet 10 is abutted against the lower plastic sheet 40;
two ends of the top cover plate 10 are provided with a positive pole column hole 11 and a negative pole column hole 12; the positive pole assembly 20 is arranged in the positive pole hole 11; the negative pole assembly 30 is arranged in the negative pole hole 12;
a first hole 41 and a second hole 42 are formed in two ends of the lower plastic sheet 40, the first hole 41 is arranged corresponding to the positive pole column hole 11, and the second hole 42 is arranged corresponding to the negative pole column hole 12; a first reverse buckle 411 is arranged around the periphery of the first hole 41 close to the top cover plate 10, and the first reverse buckle 411 is sleeved in the positive pole hole 11; the second hole 42 is provided with a second reverse buckle 421 near the periphery of the top cover plate 10, and the second reverse buckle 421 is sleeved in the negative pole column hole 12.
In a preferred embodiment, the positive pole assembly 20 comprises a positive pole 21, a positive pole sealing ring 22, a positive pole encapsulation 23 and a positive pole lower bracket 24; the positive pole 21 is arranged in the positive pole hole 11; the positive sealing ring 22 is sleeved at the bottom of the positive post 21; the positive pole encapsulation 23 is sleeved on the periphery of the bottom of the positive pole 21, and the positive pole encapsulation 23 is respectively abutted against the positive pole sealing ring 22 and the positive pole lower support 24; the positive lower support 24 is sleeved on the outer side of the first reverse buckle 411, and the positive lower support 24 is connected with the first reverse buckle 411 in an abutting mode. Through anodal lower carriage 24, can be fine support anodal post rubber coating 23, and then effectively prevent anodal post 21 and drop.
In a preferred embodiment, a positive electrode boss 111 is circumferentially disposed on the periphery of the positive electrode pillar hole 11 away from the lower plastic sheet 40, a positive electrode plastic 13 is disposed on the periphery of the positive electrode boss 111, and the positive electrode plastic 13 abuts against the positive electrode pillar 21; the plastic 13 on the positive electrode is arranged on the periphery of the positive electrode boss 111 in an injection molding or reverse buckling mode. Therefore, the difficulty of assembly of the structural part can be reduced, and the insulation property and the sealing property of the positive pole 21 are ensured.
As a preferred embodiment, the positive pole encapsulation 23 is sleeved on the periphery of the bottom of the positive pole 21 by injection molding. Thus, the positive pole 21 and the top cover plate 10 can be insulated, the insulation and the sealing performance of the positive pole 21 are ensured, and the difficulty of assembling the structural component can be reduced.
In a preferred embodiment, the positive electrode post 21 is a post obtained by integral punching.
In a preferred embodiment, the negative electrode pillar assembly 30 includes a negative electrode pillar 31, a negative electrode sealing ring 32, a negative electrode pillar encapsulation 33, and a negative electrode lower support 34; the negative pole 31 is arranged in the negative pole hole 12; the negative sealing ring 32 is sleeved at the bottom of the negative pole column 31; the negative pole encapsulation 33 is sleeved on the periphery of the bottom of the negative pole 31, and the negative pole encapsulation 33 is respectively abutted with the negative pole sealing ring 32 and the negative pole lower bracket 34; the negative electrode lower support 34 is sleeved outside the second reverse buckle 421, and the negative electrode lower support 34 is connected with the second reverse buckle 421 in an abutting mode. Through negative pole lower carriage 34, can be fine support negative pole post rubber coating 33, and then effectively prevent that negative pole post 31 from droing.
In a preferred embodiment, a negative boss 121 is circumferentially disposed on the outer periphery of the negative post hole 12 away from the lower plastic sheet 40, a negative upper plastic 14 is disposed on the outer periphery of the negative boss 121, and the negative upper plastic 14 abuts against the negative post 31; the plastic 14 on the negative electrode is arranged on the periphery of the negative electrode boss 121 in an injection molding or reverse buckling mode. Therefore, the difficulty of assembling the structural member can be reduced, and the insulation property and the sealing property of the negative pole column 31 can be ensured.
In a preferred embodiment, the negative electrode pillar coating 33 is sleeved on the outer periphery of the bottom of the negative electrode pillar 31 by injection molding. Thus, the negative pole posts 31 and the top cover plate 10 can be insulated, the insulation and the sealing performance of the negative pole posts 31 are guaranteed, and the difficulty of assembling the structural parts can be reduced.
In a preferred embodiment, the negative electrode tab 31 is a tab integrally formed by pressing a copper-aluminum composite material. In the application, the pole parts are all formed by stamping, the processing technology is simple, the preparation efficiency is high, the material cost is low, and the obvious cost advantage is achieved.
In a preferred embodiment, an explosion-proof valve hole 15 is provided between the positive pole column hole 11 and the negative pole column hole 12, and an explosion-proof valve assembly 50 is provided in the explosion-proof valve hole 15.
In a preferred embodiment, the explosion-proof valve assembly 50 includes an explosion-proof valve 51 and an explosion-proof valve protection patch 52, the explosion-proof valve 51 is disposed in the explosion-proof valve hole 15, and the explosion-proof valve protection patch 52 is disposed on a side of the explosion-proof valve 51 away from the lower plastic sheet 40.
As a preferred embodiment, a plurality of strip-shaped holes 43 are further formed in the lower plastic sheet 40, the plurality of strip-shaped holes 43 are arranged in parallel, and the strip-shaped holes 43 correspond to the explosion-proof valve holes 15.
In a preferred embodiment, the positive electrode tab 21 and the negative electrode tab 31 are square, oval or cylindrical electrode posts. Specifically, in the present embodiment, the positive electrode tab 21 and the negative electrode tab 31 are both square electrode tabs.
In a preferred embodiment, the prismatic case battery is a lithium battery or a sodium battery. Specifically, in the embodiment of the present application, the prismatic case battery is a lithium battery. It is understood that in other embodiments, the prismatic can battery may also be a sodium battery.
According to the invention, the lower support of the anode and the lower support of the cathode are arranged, so that the lower support can well support the pole for encapsulation, and the pole is effectively prevented from falling off. The positive pole is integrally formed by punching and then welded in the positive pole hole by laser, so that the sealing property and the reliability of the positive pole can be well ensured; through setting up plastic, rubber coating, lower carriage and sealing washer, guarantee the leakproofness and the insulating nature of utmost point post. In addition, the pole part is formed by stamping, the preparation efficiency is high, and the material cost is low. The application has the advantages of simple structure, good sealing performance and reliability and lower cost, and can be produced and used as a universal product.
In the application, the upper plastic and the sealing ring are both prepared by mixing one or at least two of PP, PC, PVC, PPS, PE and PET.
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 invention. 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 specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it will be understood by those skilled in the art that the specification as a whole and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by 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 characterized by being used for a square shell battery and comprising a top cover plate, a positive pole column assembly, a negative pole column assembly and a lower plastic sheet; the top cover plate is arranged on the lower plastic sheet and is abutted against the lower plastic sheet;
both ends of the top cover plate are provided with a positive pole column hole and a negative pole column hole; the positive pole component is arranged in the positive pole hole; the negative pole post assembly is arranged in the negative pole post hole;
a first hole and a second hole are formed in two ends of the lower plastic sheet, the first hole is arranged corresponding to the positive pole column hole, and the second hole is arranged corresponding to the negative pole column hole; a first reverse buckle is arranged around the periphery of the first hole close to the top cover plate, and the first reverse buckle is sleeved in the positive pole hole; the periphery of the second hole close to the top cover plate is surrounded and provided with a second reverse buckle, and the second reverse buckle is sleeved in the negative pole hole.
2. The power battery top cap structure of claim 1, wherein the positive post assembly comprises a positive post, a positive seal ring, a positive post encapsulation, and a positive under bracket; the positive pole is arranged in the positive pole hole; the positive sealing ring is sleeved at the bottom of the positive post; the positive pole encapsulation is sleeved on the periphery of the bottom of the positive pole, and the positive pole encapsulation is respectively abutted against the positive pole sealing ring and the positive pole lower support; the positive lower support is sleeved outside the first reverse buckle and connected with the first reverse buckle in an abutting mode.
3. The power battery top cover structure according to claim 2, wherein a positive boss is circumferentially arranged on the periphery of the positive post hole away from the lower plastic sheet, a positive plastic is arranged on the periphery of the positive boss, and the positive plastic abuts against the positive post; the plastic on the positive electrode is arranged on the periphery of the positive electrode boss in an injection molding or back-off mode.
4. The power battery top cover structure according to claim 2, wherein the positive pole encapsulation is sleeved on the periphery of the bottom of the positive pole in an injection molding manner;
the positive pole is a pole obtained by integral stamping.
5. The power battery top cover structure according to claim 2, wherein the negative pole assembly comprises a negative pole, a negative pole sealing ring, a negative pole encapsulation and a negative pole lower support; the negative pole is arranged in the negative pole hole; the negative sealing ring is sleeved at the bottom of the negative pole column; the negative pole column rubber coating is sleeved on the periphery of the bottom of the negative pole column, and the negative pole column rubber coating is respectively abutted with the negative pole sealing ring and the negative pole lower support; the negative pole lower bracket is sleeved on the outer side of the second reverse buckle, and the negative pole lower bracket is connected with the second reverse buckle in an abutting mode.
6. The top cover structure of the power battery according to claim 5, wherein a negative boss is circumferentially arranged on the periphery of the negative post hole away from the lower plastic sheet, a negative upper plastic is arranged on the periphery of the negative boss, and the negative upper plastic is abutted to the negative post; the plastic on the negative electrode is arranged on the periphery of the negative electrode boss in an injection molding or back-off mode.
7. The top cover structure of the power battery as claimed in claim 5, wherein the negative pole encapsulation is sleeved on the periphery of the bottom of the negative pole through injection molding;
the negative pole is a pole integrally punched by a copper-aluminum composite material.
8. The power battery top cover structure according to claim 1, wherein an explosion-proof valve hole is arranged between the positive pole column hole and the negative pole column hole, and an explosion-proof valve assembly is arranged in the explosion-proof hole.
9. The power battery top cover structure of claim 8, wherein the explosion-proof valve assembly comprises an explosion-proof valve and an explosion-proof valve protection patch, the explosion-proof valve is disposed in the explosion-proof valve hole, and the explosion-proof valve protection patch is disposed on a side of the explosion-proof valve away from the lower plastic sheet.
10. The top cover structure of the power battery as claimed in claim 8, wherein the lower plastic sheet is further provided with a plurality of strip-shaped holes, the strip-shaped holes are arranged in parallel, and the strip-shaped holes are arranged corresponding to the explosion-proof valve holes; the square shell battery is a lithium battery or a sodium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211691020.9A CN115986281A (en) | 2022-12-27 | 2022-12-27 | Power battery top cover structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211691020.9A CN115986281A (en) | 2022-12-27 | 2022-12-27 | Power battery top cover structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115986281A true CN115986281A (en) | 2023-04-18 |
Family
ID=85971825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211691020.9A Pending CN115986281A (en) | 2022-12-27 | 2022-12-27 | Power battery top cover structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115986281A (en) |
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2022
- 2022-12-27 CN CN202211691020.9A patent/CN115986281A/en active Pending
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