CN219393545U - Top cover structure of power battery - Google Patents
Top cover structure of power battery Download PDFInfo
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- CN219393545U CN219393545U CN202223507761.5U CN202223507761U CN219393545U CN 219393545 U CN219393545 U CN 219393545U CN 202223507761 U CN202223507761 U CN 202223507761U CN 219393545 U CN219393545 U CN 219393545U
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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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Abstract
The application relates to a top cover structure of a power battery, which comprises a top cover plate, a positive pole component, a negative pole component and a lower plastic piece; the top cover sheet is arranged on the lower plastic sheet and is abutted with the lower plastic sheet; the two ends of the top cover plate are provided with a positive pole hole and a negative pole hole; the positive pole component is arranged in the positive pole hole; the negative pole column component is arranged in the negative pole column 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 back-off is arranged on the periphery of the first hole, which is close to the top cover plate, and the first back-off is sleeved in the positive pole column hole; the second hole is close to the outer periphery of the top cover plate and is provided with a second back-off, and the second back-off is sleeved in the negative pole column hole. The device has the advantages of simple structure, good reliability and lower cost, and can be used as a universal product for production and use.
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
Along with the development of technology, a power battery is becoming more and more interesting as an energy device, and is widely applied in the fields of mobile phones, electric automobiles, electric tools and the like.
The top cover pole of the power battery has various structural forms, is integrally provided with the top cover pole, and also has the functions of independently arranging the pole as a component and then welding the pole on a top cover plate to form a complete top cover structure. At present, in the existing top cover pole structure of the power battery, more negative pole poles are used, a copper sheet is welded on an aluminum pole in a friction welding mode, and then the negative pole is machined and molded; the positive electrode is machined by a cold heading and machining machine, and the injection molding PPS plastic is adopted in the assembly stage to prevent the pole from falling off and forming, so that the performance is good. However, the processing technology of the top cover structure with more applications is complex, the cost is high, and the top cover structure is complex and lacks cost advantages.
Disclosure of Invention
Based on the structure, the utility model provides a power battery top cover structure, which aims to solve the problems of complex structure, higher cost, complex processing technology and the like of the power battery top cover. Compared with similar products in the market, the novel plastic composite material has the advantages of simple structure, reliable performance, low 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 utility model proposes the following technical solutions:
a power battery top cover structure 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 with the lower plastic sheet;
the two ends of the top cover plate are provided with a positive pole hole and a negative pole hole; the positive pole component is arranged in the positive pole hole; the negative pole column component is arranged in the negative pole column 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 back-off is arranged on the periphery of the first hole, which is close to the top cover plate, and the first back-off is sleeved in the positive pole column hole; the second hole is close to the outer periphery of the top cover plate and is provided with a second back-off, and the second back-off is sleeved in the negative pole column hole.
As a preferred embodiment, the positive electrode post assembly comprises a positive electrode post, a positive electrode sealing ring, a positive electrode post encapsulation and a positive electrode lower bracket; the positive pole is arranged in the positive pole hole; the positive electrode sealing ring is sleeved at the bottom of the positive electrode column; the positive pole rubber coating is sleeved on the periphery of the bottom of the positive pole, and is respectively abutted with the positive pole sealing ring and the positive pole lower bracket; the positive electrode lower support is sleeved on the outer side of the first back-off, and the positive electrode lower support is connected with the first back-off in an abutting mode. Through the lower support of the positive electrode, the rubber coating of the positive electrode column can be well propped against, and then the positive electrode column is effectively prevented from falling off.
As a preferable implementation mode, an anode boss is circumferentially arranged on the periphery of the anode post hole far away from the lower plastic sheet, an anode upper plastic is arranged on the periphery of the anode boss, and the anode upper plastic is abutted with the anode 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 preferable implementation mode, the positive pole rubber coating is sleeved on the periphery of the bottom of the positive pole in an injection molding mode.
In a preferred embodiment, the positive electrode post is a post obtained by integral stamping.
As a preferred embodiment, the negative electrode column assembly comprises a negative electrode column, a negative electrode sealing ring, a negative electrode column encapsulation and a negative electrode lower bracket; the negative pole column is arranged in the negative pole column hole; the negative electrode sealing ring is sleeved at the bottom of the negative electrode column; the negative electrode column rubber coating is sleeved on the periphery of the bottom of the negative electrode column, and is respectively abutted with the negative electrode sealing ring and the negative electrode lower bracket; the negative electrode lower support is sleeved on the outer side of the second back-off, and the negative electrode lower support is connected with the second back-off in an abutting mode. Through the negative pole lower carriage, can be fine support the negative pole post rubber coating, and then effectively prevent that the negative pole post from droing.
As a preferable implementation mode, a negative pole boss is arranged on the periphery of the negative pole column hole far away from the lower plastic sheet, a negative pole upper plastic is arranged on the periphery of the negative pole boss, and the negative pole upper plastic is in butt joint with the negative pole column; the plastic on the negative electrode is arranged on the periphery of the negative electrode boss in an injection molding or back-off mode.
As a preferable implementation mode, the negative pole column rubber coating is sleeved on the periphery of the bottom of the negative pole column in an injection molding mode.
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 obvious cost advantages are achieved.
As a preferred embodiment, an explosion-proof valve hole is arranged between the positive pole hole and the negative pole hole, and an explosion-proof valve component 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, wherein the explosion-proof valve is arranged in the explosion-proof valve hole, and the explosion-proof valve protection patch is arranged on the side surface, far away from the lower plastic sheet, of the explosion-proof valve.
As a preferable implementation mode, the lower plastic sheet is also provided with a plurality of strip-shaped holes, a plurality of strip-shaped holes are arranged in parallel, and the strip-shaped holes are correspondingly arranged with the explosion-proof valve holes.
As a preferred embodiment, the positive electrode post and the negative electrode post are square, oval or cylindrical posts.
As a preferred embodiment, the square-shaped case battery is a lithium battery or a sodium battery.
The utility model has the beneficial effects that: according to the utility model, the anode lower support and the cathode lower support are arranged, so that the lower support can well support against the encapsulation of the pole, and the pole is effectively prevented from falling off. The positive pole is integrally formed by stamping and then welded in a positive pole hole by laser, so that the tightness and 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 insulativity of utmost point post. In addition, the pole part of the application is formed by stamping, so that the preparation efficiency is high, and the material cost is low. The utility model has the advantages of this application simple structure, leakproofness and reliability are good, and the cost is lower, can regard as the universal product to produce and use.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an exploded view of a top cover structure of a power cell according to an embodiment of the present utility model;
fig. 2 is a schematic cross-sectional view of the power cell top cover structure of fig. 1 in a longitudinal direction (a direction from the positive electrode column assembly to the negative electrode column assembly);
fig. 3 is an enlarged schematic view of the structure of fig. 2 at a.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. 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.
It should be noted that, if directional indications (such as up, down, left, right, front, back, top, bottom … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will 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 "fixed" 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 the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
In the existing top cover pole structure of the power battery, more negative pole poles are used, copper sheets are welded on aluminum poles in a friction welding mode, and then the negative pole poles are machined and formed; the positive electrode is machined by a cold heading and machining machine, and the injection molding PPS plastic is adopted in the assembly stage to prevent the pole from falling off and forming, so that the performance is good. However, the processing technology of the top cover structure with more applications is complex, the cost is high, and the top cover structure is complex and lacks cost advantages. Based on the above, the present utility model 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 utility model provides a power battery top cover structure for a square-case battery, including a top cover sheet 10, a positive electrode post assembly 20, a negative electrode 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 with the lower plastic sheet 40;
the two ends of the top cover sheet 10 are provided with a positive pole hole 11 and a negative pole hole 12; the positive electrode post assembly 20 is arranged in the positive electrode post hole 11; the negative electrode post assembly 30 is disposed within the negative electrode post hole 12;
a first hole 41 and a second hole 42 are arranged at 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 back-off 411 is arranged on the periphery of the first hole 41, which is close to the top cover sheet 10, and the first back-off 411 is sleeved in the positive pole hole 11; the second hole 42 is close to the outer periphery of the top cover sheet 10 and is provided with a second back-off 421, and the second back-off 421 is sleeved in the negative electrode column hole 12.
As a preferred embodiment, the positive electrode post assembly 20 includes a positive electrode post 21, a positive electrode seal ring 22, a positive electrode post encapsulation 23, and a positive electrode lower bracket 24; the positive electrode post 21 is disposed in the positive electrode post hole 11; the positive electrode sealing ring 22 is sleeved at the bottom of the positive electrode column 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 bracket 24; the positive electrode lower bracket 24 is sleeved outside the first back-off 411, and the positive electrode lower bracket 24 is connected with the first back-off 411 in an abutting manner. Through the positive electrode lower support 24, the positive electrode column rubber coating 23 can be well propped against, and further the positive electrode column 21 is effectively prevented from falling off.
As a preferred embodiment, the positive pole hole 11 is circumferentially provided with a positive pole boss 111 away from the outer periphery of the lower plastic sheet 40, the outer periphery of the positive pole boss 111 is provided with a positive pole upper plastic 13, and the positive pole upper plastic 13 is abutted against the positive pole 21; the plastic 13 on the positive electrode is arranged on the periphery of the positive electrode boss 111 in an injection molding or back-off mode. This reduces the difficulty in assembling the structural member and ensures the insulation and sealing properties of the positive electrode post 21.
As a preferred embodiment, the positive electrode post rubber coating 23 is sleeved on the outer periphery of the bottom of the positive electrode post 21 in an injection molding manner. In this way, the positive electrode post 21 and the top cover sheet 10 can be insulated from each other, the insulation and sealing properties of the positive electrode post 21 can be ensured, and the difficulty in assembling structural members can be reduced.
In a preferred embodiment, the positive electrode tab 21 is a tab obtained by integral stamping.
As a preferred embodiment, the negative electrode post assembly 30 includes a negative electrode post 31, a negative electrode seal ring 32, a negative electrode post encapsulation 33, and a negative electrode lower bracket 34; the negative electrode column 31 is disposed in the negative electrode column hole 12; the negative electrode sealing ring 32 is sleeved at the bottom of the negative electrode column 31; the negative electrode column rubber coating 33 is sleeved on the periphery of the bottom of the negative electrode column 31, and the negative electrode column rubber coating 33 is respectively abutted against the negative electrode sealing ring 32 and the negative electrode lower bracket 34; the negative electrode lower bracket 34 is sleeved outside the second back-off 421, and the negative electrode lower bracket 34 is connected with the second back-off 421 in an abutting manner. The negative electrode lower support 34 can well support the negative electrode column rubber coating 33, so that the negative electrode column 31 is effectively prevented from falling off.
As a preferred embodiment, a negative electrode boss 121 is circumferentially disposed on the periphery of the negative electrode post hole 12 away from the lower plastic sheet 40, a negative electrode upper plastic 14 is disposed on the periphery of the negative electrode boss 121, and the negative electrode upper plastic 14 abuts against the negative electrode 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 back-off mode. This reduces the difficulty in assembling the structural member, and ensures the insulation and sealing properties of the negative electrode column 31.
As a preferred embodiment, the negative electrode post encapsulation 33 is sleeved on the outer periphery of the bottom of the negative electrode post 31 through injection molding. In this way, the negative electrode 31 and the top cover sheet 10 can be insulated from each other, the insulation and sealing properties of the negative electrode 31 can be ensured, and the difficulty in assembling structural members can be reduced.
In a preferred embodiment, the negative electrode 31 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 obvious cost advantages are achieved.
As a preferred embodiment, an explosion-proof valve hole 15 is disposed between the positive electrode post hole 11 and the negative electrode post hole 12, and an explosion-proof valve assembly 50 is disposed in the explosion-proof hole 15.
As 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, the lower plastic sheet 40 is further provided with a plurality of strip-shaped holes 43, a plurality of strip-shaped holes 43 are arranged in parallel, and the strip-shaped holes 43 are arranged corresponding to the explosion-proof valve holes 15.
As a preferred embodiment, the positive electrode post 21 and the negative electrode post 31 are square, oval or cylindrical posts. Specifically, in the embodiment of the present application, the positive electrode post 21 and the negative electrode post 31 are square electrode posts.
As a preferred embodiment, the square-shaped case battery is a lithium battery or a sodium battery. Specifically, in the embodiment of the present application, the square-shaped case battery is a lithium battery. It will be appreciated that in other embodiments, the square housing battery may also be a sodium battery.
According to the utility model, the anode lower support and the cathode lower support are arranged, so that the lower support can well support against the encapsulation of the pole, and the pole is effectively prevented from falling off. The positive pole is integrally formed by stamping and then welded in a positive pole hole by laser, so that the tightness and 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 insulativity of utmost point post. In addition, the pole part of the application is formed by stamping, so that the preparation efficiency is high, and the material cost is low. The utility model has the advantages of this application simple structure, leakproofness and reliability are good, and the cost is lower, can regard as the universal product to produce and use.
In the application, the upper plastic and the sealing ring are prepared by mixing one material or at least two materials of PP, PC, PVC, PPS, PE and PET.
In the description herein, reference to the term "one embodiment," "an example," etc., means 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, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in the foregoing embodiments, and that the embodiments described in the foregoing embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. The power battery top cover structure 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 sheet is arranged on the lower plastic sheet and is abutted with the lower plastic sheet;
the two ends of the top cover plate are provided with a positive pole hole and a negative pole hole; the positive pole component is arranged in the positive pole hole; the negative pole column component is arranged in the negative pole column 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 back-off is arranged on the periphery of the first hole, which is close to the top cover plate, and the first back-off is sleeved in the positive pole column hole; the second hole is close to the outer periphery of the top cover plate and is provided with a second back-off, and the second back-off is sleeved in the negative pole column hole.
2. The power cell top cover structure of claim 1, wherein the positive electrode post assembly comprises a positive electrode post, a positive electrode sealing ring, a positive electrode post encapsulation and a positive electrode lower bracket; the positive pole is arranged in the positive pole hole; the positive electrode sealing ring is sleeved at the bottom of the positive electrode column; the positive pole rubber coating is sleeved on the periphery of the bottom of the positive pole, and is respectively abutted with the positive pole sealing ring and the positive pole lower bracket; the positive electrode lower support is sleeved on the outer side of the first back-off, and the positive electrode lower support is connected with the first back-off 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 is abutted with 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 obtained through integral stamping.
5. The power cell top cover structure of claim 2, wherein the negative post assembly comprises a negative post, a negative seal ring, a negative post encapsulation, and a negative sub-mount; the negative pole column is arranged in the negative pole column hole; the negative electrode sealing ring is sleeved at the bottom of the negative electrode column; the negative electrode column rubber coating is sleeved on the periphery of the bottom of the negative electrode column, and is respectively abutted with the negative electrode sealing ring and the negative electrode lower bracket; the negative electrode lower support is sleeved on the outer side of the second back-off, and the negative electrode lower support is connected with the second back-off in an abutting mode.
6. The power battery top cover structure according to claim 5, wherein a negative electrode boss is circumferentially arranged at the periphery of the negative electrode post hole away from the lower plastic piece, a negative electrode upper plastic is arranged at the periphery of the negative electrode boss, and the negative electrode upper plastic is abutted with the negative electrode 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 power battery top cover structure according to claim 5, wherein the negative pole column rubber coating is sleeved on the periphery of the bottom of the negative pole column in an injection molding mode;
the negative pole post is a pole post obtained by integrally stamping a copper-aluminum composite material.
8. The power cell top cover structure according to claim 1, wherein an explosion-proof valve hole is provided between the positive electrode post hole and the negative electrode post hole, and an explosion-proof valve assembly is provided in the explosion-proof valve hole.
9. The power cell 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 being disposed in the explosion-proof valve aperture, the explosion-proof valve protection patch being disposed on a side of the explosion-proof valve remote from the lower plastic sheet.
10. The power battery top cover structure according to 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 |
|---|---|---|---|
| CN202223507761.5U CN219393545U (en) | 2022-12-27 | 2022-12-27 | Top cover structure of power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223507761.5U CN219393545U (en) | 2022-12-27 | 2022-12-27 | Top cover structure of power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219393545U true CN219393545U (en) | 2023-07-21 |
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ID=87166983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223507761.5U Active CN219393545U (en) | 2022-12-27 | 2022-12-27 | Top cover structure of power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219393545U (en) |
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2022
- 2022-12-27 CN CN202223507761.5U patent/CN219393545U/en active Active
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