CN217956090U - Power battery annotates liquid mouth block structure - Google Patents
Power battery annotates liquid mouth block structure Download PDFInfo
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- CN217956090U CN217956090U CN202220954868.5U CN202220954868U CN217956090U CN 217956090 U CN217956090 U CN 217956090U CN 202220954868 U CN202220954868 U CN 202220954868U CN 217956090 U CN217956090 U CN 217956090U
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- hole
- liquid injection
- top cover
- cover plate
- power battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Filling, Topping-Up Batteries (AREA)
Abstract
The application relates to a power battery liquid injection port plugging structure, which is used for a square shell battery and comprises a top cover plate, steel balls and a lower plastic plate; the top cover plate is arranged on the lower plastic plate and is abutted against the lower plastic plate; the top cover plate is provided with a liquid injection hole penetrating through the top cover plate, the steel ball is arranged in the liquid injection hole, and the steel ball is in interference fit with the liquid injection hole; a groove is formed in the lower plastic plate and is arranged below the liquid injection hole; the groove is arranged in a concave mode towards the direction far away from the top cover plate; the side wall of the groove is provided with a plurality of penetrating holes, and the aperture of each penetrating hole is smaller than the diameter of the steel ball. The battery has the advantages of simple structure, good sealing performance and reliability, low cost, capability of effectively avoiding short circuit caused by contact of the steel balls with the positive and negative pole pieces, capability of ensuring the safety of the battery to the maximum extent, and capability of being produced and used as a general product.
Description
Technical Field
The utility model relates to a power battery technical field especially relates to a liquid mouth block structure is annotated to power battery.
Background
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. The production process of the square lithium battery/sodium ions needs to be subjected to the processes of liquid injection, high-temperature storage, formation and the like. At present, the liquid injection port of a square lithium ion/sodium ion battery is mostly plugged by drilling steel balls into the liquid injection hole. When the steel ball is knocked into the liquid injection port of the cover plate, the steel ball is matched with the liquid injection port in an interference manner, so that the steel ball is tightly matched with the cover plate, and the aim of sealing is fulfilled.
However, an operator often carelessly strikes the steel ball into the battery and is difficult to take out the steel ball from the battery; moreover, if the steel balls directly drop on the battery roll core, internal short circuit of the battery may be caused, which is easy to cause danger. In addition, when the top cover is produced, if the liquid injection hole on the cover plate is too poor, the liquid injection hole is difficult to ensure to be in a perfect circle shape, and the periphery of the liquid injection hole can have defects of ellipses, bulges or grooves and the like. If the liquid injection hole is sealed by pumping the steel balls, the matching of the steel balls and the cover plate is too loose due to the defects of the top cover after the steel balls are pumped into the liquid injection hole, the liquid injection hole is difficult to be completely sealed, and the sealing purpose cannot be achieved; and there is the gap between steel ball and the top cap, has the risk of weeping, also can produce certain defective rate simultaneously.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a liquid mouth block structure is annotated to power battery aims at solving power battery and annotates that the liquid hole is sealed to produce weeping, leakproofness is relatively poor, and the steel ball drops the inside problem that leads to the short circuit etc. of battery. This application simple structure, the leakproofness is good, and the cost is lower, has better reliability, can avoid the steel ball to drop the inside emergence of battery, can regard as the commodity to produce and use.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a power battery liquid injection port plugging structure is used for a square shell battery and comprises a top cover plate, steel balls and a lower plastic plate; the top cover plate is arranged on the lower plastic plate and is abutted against the lower plastic plate;
the top cover plate is provided with a liquid injection hole penetrating through the top cover plate, the steel ball is arranged in the liquid injection hole, and the steel ball is in interference fit with the liquid injection hole;
a groove is formed in the lower plastic plate and is arranged below the liquid injection hole; the groove is arranged in a concave manner towards the direction far away from the top cover plate; the side wall of the groove is provided with a plurality of penetrating holes, and the aperture of each penetrating hole is smaller than the diameter of the steel ball.
In a preferred embodiment, the plurality of through holes are symmetrically arranged on the side walls of the two sides of the groove, and the adjacent through holes are arranged at equal intervals.
In a preferred embodiment, the diameter of each of the penetration holes is smaller than the diameter of the liquid inlet, and the sum of the diameters of the penetration holes is larger than the diameter of the liquid inlet. Like this, the assurance that can be fine is annotated quick stable supply, and effectively prevents the emergence of weeping.
In a preferred embodiment, the groove, the through hole and the lower plastic plate are integrally formed.
In a preferred embodiment, both ends of the top cover plate are provided with a positive pole column hole and a negative pole column hole, the liquid injection hole is arranged between the positive pole column hole and the negative pole column hole, and the liquid injection hole is arranged close to the positive pole column hole; the cathode column hole is internally provided with a cathode column, and the cathode column hole is internally provided with a cathode column.
In a preferred embodiment, the positive electrode post is disposed in the positive electrode post hole by welding. The positive pole is fixed in a welding mode, and the sealing performance and the reliability of the positive pole can be well guaranteed.
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, 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 has the advantages that the groove is arranged on the lower plastic plate, the groove is arranged below the liquid injection hole, and the side wall of the groove is provided with the penetration hole, so that the electrolyte injected from the liquid injection hole can flow into the battery through the penetration hole; because the aperture of the penetrating hole is smaller than the diameter of the steel ball, when the steel ball is knocked out of the liquid injection hole carelessly, the steel ball can fall into the groove of the lower plastic plate, the steel ball cannot fall into the battery and cannot fall on a battery roll core, so that the short circuit caused by the contact of the steel ball and the positive and negative pole pieces can be effectively avoided, and the safety of the battery is ensured to the maximum extent. When the battery needs fluid infusion, beat the steel ball and annotate the liquid hole and make the steel ball drop and be being pocketed by the recess in the recess, it is convenient to take out, then through annotating the liquid hole with pierce through the pore pair battery carry out the fluid infusion can. 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 a schematic cross-sectional structural view of a sealing structure of a liquid filling port of a power battery in a longitudinal direction according to an embodiment of the present invention;
fig. 2 is an enlarged schematic view of fig. 1 at a.
The objects, features and advantages of the present invention will be further described 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 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 or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
At present, when plugging operation of a liquid injection hole is carried out, the situation that an operator carelessly knocks a steel ball into a battery and the steel ball is difficult to take out of the battery often occurs; moreover, if the steel balls directly drop on the battery roll core, internal short circuit of the battery may be caused, which is easy to cause danger. In addition, when the top cover is produced, if the liquid injection hole on the cover plate is too different, the liquid injection hole is difficult to ensure to be in a perfect circle shape, and the periphery of the liquid injection hole can have defects of ellipses, bulges, grooves and the like; if the steel ball is driven into the liquid injection hole to seal the liquid injection hole, the matching of the steel ball and the cover plate is too loose due to the defect of the top cover, so that the liquid injection hole is difficult to be completely sealed, and the sealing purpose cannot be achieved; and there is the gap between steel ball and the top cap, has the risk of weeping, also can produce certain defective rate simultaneously. Based on this, the utility model provides a power battery annotates liquid mouth block structure is in order to solve above-mentioned technical problem.
Specifically, as shown in fig. 1 to 2, an embodiment of the present invention provides a power battery liquid injection port plugging structure, which is used for a square casing battery, and includes a top cover plate 10, steel balls 20, and a lower plastic plate 30; the top cover plate 10 is arranged on the lower plastic plate 30, and the top cover plate 10 is abutted against the lower plastic plate 30;
the top cover plate 10 is provided with a liquid injection hole 11 penetrating through the top cover plate 10, the steel ball 20 is arranged in the liquid injection hole 11, and the steel ball 20 is in interference fit with the liquid injection hole 11;
a groove 31 is formed in the lower plastic plate 30, and the groove 31 is formed below the liquid injection hole 11; the groove 31 is concavely arranged in the direction far away from the top cover plate 10; the side wall of the groove 31 is provided with a plurality of penetrating holes 311, and the aperture of the penetrating holes 311 is smaller than the diameter of the steel ball 20.
In a preferred embodiment, the plurality of through holes 311 are symmetrically disposed on two side walls of the groove 31, and adjacent through holes 311 are disposed at equal intervals. Therefore, the electrolyte can be well guaranteed to be uniformly supplied to the lithium ion battery, and the uniformity of the lithium ion battery is well guaranteed.
In a preferred embodiment, the diameter of each of the through holes 311 is smaller than the diameter of the liquid injection hole 11, and the sum of the diameters of the through holes 311 is larger than the diameter of the liquid injection hole 11. Like this, the assurance that can be fine annotates quick stable and continuous supply, the homogeneity of better assurance lithium cell, and effectively prevent the emergence of weeping.
In the embodiment of the application, the outlet of the liquid injection hole 11 is arranged in a horn-like shape, so that the steel ball can be knocked into the liquid injection hole, and the steel ball is not easy to knock out from the outlet of the liquid injection hole, thereby being convenient for fixing the steel ball.
In a preferred embodiment, the groove 31, the through hole 311 and the lower plastic plate 30 are integrally formed.
In a preferred embodiment, both ends of the top cover plate 10 are provided with a positive pole hole (not shown) and a negative pole hole (not shown), the liquid injection hole 11 is arranged between the positive pole hole and the negative pole hole, and the liquid injection hole 11 is arranged close to the positive pole hole; the positive pole column hole is internally provided with a positive pole column 40, and the negative pole column hole is internally provided with a negative pole column 50.
In a preferred embodiment, the positive electrode post 40 is disposed in the positive electrode post hole by welding. The positive electrode pole 40 is fixed in a welding mode, and the sealing performance and the reliability of the positive electrode pole 40 can be well guaranteed.
In a preferred embodiment, the positive electrode post 40 is a post obtained by cold heading or aluminum coil stamping; the negative electrode post 50 is a post 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, the positive electrode terminal 40 and the negative electrode terminal 50 are square, oval or cylindrical terminals.
In a preferred embodiment, the prismatic case battery is a lithium battery or a sodium battery.
In the application, the sealing gasket is prepared by mixing one or at least two materials of PP, PC, PVC, PPS, PE and PET.
The lower plastic plate 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 the cathode are fixedly connected by adopting a pre-assembly positioning mode and then a welding mode, wherein the welding mode can be one or combination of a plurality of welding modes such as laser welding, resistance welding, friction welding and the like.
The utility model has the advantages that the groove is arranged on the lower plastic plate, the groove is arranged below the liquid injection hole, and the side wall of the groove is provided with the penetration hole, so that the electrolyte injected from the liquid injection hole can flow into the battery through the penetration hole; because the aperture of the penetrating hole is smaller than the diameter of the steel ball, when the steel ball is knocked out of the liquid injection hole carelessly, the steel ball can fall into the groove of the lower plastic plate, the steel ball cannot fall into the battery and cannot fall on a battery roll core, so that the short circuit caused by the contact of the steel ball and the positive and negative pole pieces can be effectively avoided, and the safety of the battery is ensured to the maximum extent. When the battery needs fluid infusion, beat the steel ball and annotate the liquid hole and make the steel ball drop and be being pocketed by the recess in the recess, it is convenient to take out, then through annotating the liquid hole with pierce through the pore pair battery carry out the fluid infusion can. 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 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 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 power battery liquid injection port plugging structure is characterized by being used for a square shell battery and comprising a top cover plate, steel balls and a lower plastic plate; the top cover plate is arranged on the lower plastic plate and is abutted against the lower plastic plate;
the top cover plate is provided with a liquid injection hole penetrating through the top cover plate, the steel ball is arranged in the liquid injection hole, and the steel ball is in interference fit with the liquid injection hole;
a groove is formed in the lower plastic plate and is arranged below the liquid injection hole; the groove is arranged in a concave mode towards the direction far away from the top cover plate; the side wall of the groove is provided with a plurality of penetrating holes, and the aperture of each penetrating hole is smaller than the diameter of the steel ball.
2. The power battery electrolyte injection port blocking structure according to claim 1, wherein a plurality of the penetrating holes are symmetrically arranged on the two side walls of the groove, and the adjacent penetrating holes are equidistantly arranged.
3. The power battery liquid filling port blocking structure according to claim 2, wherein the aperture of each penetrating hole is smaller than that of the liquid filling hole, and the sum of the apertures of the penetrating holes is larger than that of the liquid filling hole.
4. The structure for blocking the liquid injection port of the power battery as claimed in claim 1, wherein the groove, the through hole and the lower plastic plate are integrally formed.
5. The power battery liquid injection port blocking structure is characterized in that a positive pole column hole and a negative pole column hole are formed in two ends of the top cover plate, the liquid injection hole is formed between the positive pole column hole and the negative pole column hole, and the liquid injection hole is arranged close to the positive pole column hole; the positive pole column hole is internally provided with a positive pole column, and the negative pole column hole is internally provided with a negative pole column.
6. The power battery liquid injection port blocking structure according to claim 5, wherein the positive pole post is arranged in the positive pole post hole by welding.
7. The power battery liquid injection port blocking structure according to claim 5, wherein the positive electrode post is a post obtained by cold heading processing or aluminum coil stamping; the negative pole is a pole obtained by coiling and stamping a copper-aluminum composite material.
8. The power battery injection port blocking structure according to claim 5, wherein the positive electrode post and the negative electrode post are square, oval or cylindrical posts.
9. The power battery liquid filling port blocking structure of claim 1, wherein the square shell battery is a lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220954868.5U CN217956090U (en) | 2022-04-24 | 2022-04-24 | Power battery annotates liquid mouth block structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220954868.5U CN217956090U (en) | 2022-04-24 | 2022-04-24 | Power battery annotates liquid mouth block structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217956090U true CN217956090U (en) | 2022-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220954868.5U Active CN217956090U (en) | 2022-04-24 | 2022-04-24 | Power battery annotates liquid mouth block structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217956090U (en) |
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2022
- 2022-04-24 CN CN202220954868.5U patent/CN217956090U/en active Active
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