CN217606923U - Power battery top cover structure - Google Patents
Power battery top cover structure Download PDFInfo
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- CN217606923U CN217606923U CN202220580346.3U CN202220580346U CN217606923U CN 217606923 U CN217606923 U CN 217606923U CN 202220580346 U CN202220580346 U CN 202220580346U CN 217606923 U CN217606923 U CN 217606923U
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- negative pole
- hole
- top cover
- explosion
- proof valve
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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, a negative pole 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; a boss is circumferentially arranged on the periphery of the negative pole column hole, which is far away from the lower plastic sheet; the positive pole column is arranged in the positive pole column hole; the negative pole column assembly comprises upper plastic, a bracket, a negative pole column and a sealing ring; the sealing ring is sleeved at the bottom of the negative pole, and the negative pole is arranged in the negative pole hole; the bracket is arranged on the boss; the upper plastic is arranged on the boss in an injection molding mode, and the bracket is arranged between the upper plastic and the boss; go up the plastic and mould plastics in between negative pole utmost point post with the support, just go up the plastic with sealing washer looks butt. This application simple structure, leakproofness are good.
Description
Technical Field
The utility model relates to a power battery technical field especially relates to a power battery top cap structure.
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. At present, in the existing lithium battery top cap terminal post structure, the negative electrode terminal post of the lithium battery adopts oxygen-free red copper completely, and the negative electrode terminal post of the lithium battery is welded on an aluminum post through a friction welding mode and then machined to be in 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. Also adopt the stamping workpiece preparation utmost point post, but this kind of mode need be followed the outside at top cap utmost point post position and is moulded plastics, utilizes the anti-shear force of plastic to fix utmost point post, and its stopping mainly relies on the anti-shear capacity support of moulding plastics to glue, and the stretching resistance is less, hardly reaches the standard requirement of test, also influences the stability in use of lithium cell easily.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a power battery top cap structure aims at solving the problem that power battery top cap structure is complicated, the cost is higher, the stretching resistance is less, the leakproofness is relatively poor etc. The sealing structure is simple in structure, good in sealing performance, low in cost and good in reliability, and can be used as a universal product for production and use.
In order to achieve the above object, the embodiment of the present invention provides 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, a negative pole component and a lower plastic sheet; the top cover sheet 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; a boss is circumferentially arranged on the periphery of the negative pole column hole, which is far away from the lower plastic sheet; the positive pole column is arranged in the positive pole column hole;
the negative pole column assembly comprises upper plastic, a bracket, a negative pole column and a sealing ring; the sealing ring is sleeved at the bottom of the negative pole, and the negative pole is arranged in the negative pole hole; the bracket is arranged on the boss; the upper plastic is arranged on the boss in an injection molding mode, and the bracket is arranged between the upper plastic and the boss; go up the plastic and mould plastics in between negative pole utmost point post with the support, just go up the plastic with sealing washer looks butt.
As a preferred embodiment, a first hole and a second hole are formed at 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; the periphery of the second hole close to the top cover plate is surrounded and provided with a flange reverse buckle, and the flange reverse buckle is sleeved in the negative pole hole.
In a preferred embodiment, the positive pole post is arranged in the positive pole post hole by welding; the support is arranged at the top end of the inner side surface of the boss in a welding mode.
As a preferred embodiment, the positive electrode pole is a pole obtained by cold heading or aluminum coil stamping; the negative pole is a pole obtained by coiling and stamping a copper-aluminum composite material. In this application, utmost point post part all adopts cold-heading processing or coil stock stamping forming, and preparation efficiency is high, and material cost is low.
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 terminal and the negative electrode terminal are square, oval or cylindrical terminals.
In a preferred embodiment, the prismatic case battery is a lithium battery or a sodium battery.
The utility model discloses the beneficial effect who reaches: the utility model discloses a set up the boss to set up the support on the boss, make the support as the stress point of negative pole utmost point post stopping, the stopping power is big, and specially adapted probably produces the occasion of vibration, such as new energy automobile. And, play the effect of transmission stopping through last plastic, simultaneously, go up the plastic and can fill the gap of negative pole utmost point post and top cap piece completely and form the insulating layer, make between negative pole utmost point post and the top cap piece insulating. 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 and sealing washer, guarantee negative pole post's leakproofness and insulating nature. In addition, the pole part of this application all adopts cold-heading processing or coil stock stamping forming, and preparation efficiency is high, and material cost is low. The sealing device is simple in structure, good in sealing performance and reliability and low in cost, and can be used as a universal 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 needed to be 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 present 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;
fig. 3 is an enlarged schematic view of fig. 2 at a.
The realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, 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 drawings), and if the specific posture is changed, the directional indication is 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 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 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 implicitly indicating 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, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other 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 adopts oxygen-free red copper completely, and the copper sheet is welded on the aluminum column in a friction welding mode and then machined to be of 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. Also adopt the stamping workpiece preparation utmost point post, but this kind of mode need be moulded plastics from the outside at top cap utmost point post position, utilizes the anti-shear force of plastic to fix utmost point post, and its stopping mainly relies on the anti-shear capacity support of injection moulding glue, and the stretching resistance is less, hardly reaches the standard requirement of test, also influences the stability in use of lithium cell easily. Based on this, the utility model provides a power battery top cap structure is in order to solve above-mentioned technical problem.
Specifically, as shown in fig. 1 to 3, an embodiment of the present invention provides a power battery top cover structure for a square casing battery, including a top cover plate 10, a positive electrode post 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 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; a boss 13 is circumferentially arranged on the periphery of the negative pole column hole 12 away from the lower plastic sheet 40; the positive pole post 20 is arranged in the positive pole post hole 11;
the negative pole assembly 30 comprises an upper plastic 31, a bracket 32, a negative pole 33 and a sealing ring 34; the sealing ring 34 is sleeved at the bottom of the cathode pole 33, and the cathode pole 33 is arranged in the cathode pole hole 12; the bracket 32 is arranged on the boss 13; the upper plastic 31 is arranged on the boss 13 in an injection molding manner, and the bracket 32 is arranged between the upper plastic 31 and the boss 13; the upper plastic 31 is injection-molded between the cathode pole 33 and the support 32, and the upper plastic 31 is abutted to the sealing ring 34.
Go up the plastic with sealing washer looks butt and produce the resilience force, can fill the gap of negative pole utmost point post and top cap piece completely and form the insulating layer, make between negative pole utmost point post and the top cap piece insulating, guarantee the insulating nature and the leakproofness of negative pole utmost point post.
In a preferred embodiment, a first hole 41 and a second hole 42 are formed at both ends of the lower plastic sheet 40, the first hole 41 is formed corresponding to the positive column hole 11, and the second hole 42 is formed corresponding to the negative column hole 12; the second hole 42 is provided with a flange reverse buckle 43 close to the periphery of the top cover plate 10, and the flange reverse buckle 43 is sleeved in the negative pole column hole 12.
In a preferred embodiment, the positive electrode post 20 is disposed in the positive electrode post hole 11 by welding; the bracket 32 is arranged at the top end of the inner side surface of the boss 13 in a welding mode. Through welded connection, the leakproofness, reliability and the stability of assurance structure that can be fine.
In a preferred embodiment, the positive electrode post 20 is a post obtained by cold heading or aluminum coil stamping; the negative pole 33 is a pole obtained by coiling and stamping a copper-aluminum composite material. In this application, utmost point post part all adopts cold-heading processing or coil stock stamping forming, and preparation efficiency is high, and material cost is low.
In a preferred embodiment, an explosion-proof valve hole 14 is disposed between the positive pole column hole 11 and the negative pole column hole 12, and an explosion-proof valve assembly 50 is disposed in the explosion-proof valve hole 14.
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 14, 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 44 are further formed in the lower plastic sheet 40, the strip-shaped holes 44 are arranged in parallel, and the strip-shaped holes 44 are arranged corresponding to the explosion-proof valve holes 14.
In a preferred embodiment, the positive electrode post 20 and the negative electrode post 33 are square, oval or cylindrical posts.
In a preferred embodiment, the prismatic case battery is a lithium battery or a sodium battery.
In the application, the upper plastic and the sealing ring are both made of one or at least two materials of PP, PC, PVC, PPS, PE and PET.
In this application, go up the plastic and can mould plastics into the structure, also can mould plastics jointly together with negative pole utmost point post, can reduce the degree of difficulty of structure assembly like this.
The lower plastic sheet can be processed in an injection molding mode, has higher precision and is simple and reliable in structure.
In the embodiment of the application, the anode and cathode columns are connected and fixed by adopting a welding mode after being pre-assembled and positioned, and the welding mode can be one or a combination of multiple welding modes such as laser welding, resistance welding, friction welding and the like.
The utility model discloses a set up the boss to set up the support on the boss, make the support as the stress point of negative pole utmost point post stopping, the stopping power is big, and specially adapted probably produces the occasion of vibration, such as new energy automobile. And, play the effect of transmission stopping through last plastic, simultaneously, go up the plastic and can fill the gap of negative pole utmost point post and top cap piece completely and form the insulating layer, make between negative pole utmost point post and the top cap piece insulating. 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 and sealing washer, guarantee negative pole post's leakproofness and insulating nature. In addition, the pole part of the application is processed by cold heading or formed by roll 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 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 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 only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (9)
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 post, a negative pole post 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; a boss is circumferentially arranged on the periphery of the negative pole column hole, which is far away from the lower plastic sheet; the positive pole column is arranged in the positive pole column hole;
the negative pole column assembly comprises upper plastic, a bracket, a negative pole column and a sealing ring; the sealing ring is sleeved at the bottom of the negative pole, and the negative pole is arranged in the negative pole hole; the bracket is arranged on the boss; the upper plastic is arranged on the boss in an injection molding mode, and the bracket is arranged between the upper plastic and the boss; go up the plastic and mould plastics in between negative pole utmost point post with the support, just go up the plastic with sealing washer looks butt.
2. The top cover structure of the power battery according to claim 1, wherein a first hole and a second hole are formed at 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; the periphery of the second hole close to the top cover plate is surrounded and provided with a flange reverse buckle, and the flange reverse buckle is sleeved in the negative pole hole.
3. The power battery top cover structure according to claim 2, wherein the positive pole post is arranged in the positive pole post hole in a welding manner; the support is arranged at the top end of the inner side surface of the boss in a welding mode.
4. The power battery top cover structure according to claim 3, wherein the positive pole is a pole obtained by cold heading or aluminum coil stamping; the negative pole is a pole obtained by coiling and stamping a copper-aluminum composite material.
5. The power battery top cover structure of claim 4, 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 component is arranged in the explosion-proof valve hole.
6. The power battery top cover structure of claim 5, 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.
7. The top cover structure of the power battery as claimed in claim 6, 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.
8. The power battery top cap structure of claim 1, wherein the positive pole post and the negative pole post are square, oval, or cylindrical posts.
9. The top cover structure of the power battery as claimed in claim 1, wherein the square case battery is a lithium battery or a sodium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220580346.3U CN217606923U (en) | 2022-03-16 | 2022-03-16 | Power battery top cover structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220580346.3U CN217606923U (en) | 2022-03-16 | 2022-03-16 | Power battery top cover structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217606923U true CN217606923U (en) | 2022-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220580346.3U Active CN217606923U (en) | 2022-03-16 | 2022-03-16 | Power battery top cover structure |
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| Country | Link |
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| CN (1) | CN217606923U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116799387A (en) * | 2023-08-16 | 2023-09-22 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
-
2022
- 2022-03-16 CN CN202220580346.3U patent/CN217606923U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116799387A (en) * | 2023-08-16 | 2023-09-22 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
| CN116799387B (en) * | 2023-08-16 | 2023-12-26 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
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