CN218887489U - Power battery annotates liquid mouth seal structure - Google Patents
Power battery annotates liquid mouth seal structure Download PDFInfo
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- CN218887489U CN218887489U CN202223015600.4U CN202223015600U CN218887489U CN 218887489 U CN218887489 U CN 218887489U CN 202223015600 U CN202223015600 U CN 202223015600U CN 218887489 U CN218887489 U CN 218887489U
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- liquid injection
- power battery
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- fixing piece
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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 utility model provides a power battery liquid filling port sealing structure, which is suitable for a square shell battery and comprises a cover plate and a sealing valve assembly, wherein one end of the cover plate is provided with a liquid filling hole, the bottom of the liquid filling hole is provided with a concave platform communicated with the liquid filling hole, and the sealing valve assembly is arranged on the concave platform; the sealing valve assembly comprises a steel ball, an elastic piece and a fixing piece, a through hole penetrating through the fixing piece is formed in the geometric center of the fixing piece, and the through hole is communicated with the liquid injection hole; the steel ball is arranged in one end of the through hole close to the liquid injection hole; the elastic piece is arranged in one end of the through hole, which is far away from the liquid injection hole, and the steel ball is abutted with the elastic piece; the fixing piece is arranged on the concave table. The welding device is good in reliability, and can avoid the problems of welding, fire explosion and the like; the structure that it adopted one-way conduction, be convenient for follow-up fluid infusion of electric core and the sealed after the fluid infusion, effectively solved the not enough problem that needs the fluid infusion of electrolyte after electric core uses.
Description
Technical Field
The utility model relates to a power battery technical field especially relates to a liquid mouth seal structure is annotated to power battery.
Background
With the increasing aggravation of environmental pollution, the new energy industry is more and more valued by people; the performance of the lithium ion power battery, which is an important component of an electric vehicle, directly affects the service life of the electric vehicle, and thus the lithium ion power battery attracts wide attention.
In the lithium ion power battery, the service life of a battery core is directly influenced by the amount of electrolyte; however, in order to pursue an extremely high energy density, the space inside the battery cell is often fully utilized, the storage space for the electrolyte is becoming smaller, and the electrolyte needs to be constantly replenished through the electrolyte injection hole after the battery cell is used. At present, the sealing mode of the liquid injection hole is mostly a laser welding mode; the problems of fire explosion, cracks easily appearing in welding seams and the like easily occur in laser welding after liquid injection, and the operation of supplementing electrolyte in the use process of the battery cell is inconvenient, so that the requirement of practical use is difficult to meet.
SUMMERY OF THE UTILITY MODEL
Based on this, the embodiment of the utility model provides a liquid mouth seal structure is annotated to power battery aims at solving the sealed easy fire blast of notes liquid hole in the prior art, the welding seam appears the crack easily, be not convenient for follow-up electric core and supply electrolyte operation scheduling problem. This application adopts one-way conduction's structure, and it is sealed to need not laser welding, and electrolyte can follow notes liquid hole outside and pour into electric core into, nevertheless can't flow from electric core inside, the fluid infusion of the follow-up electric core of being convenient for. Simultaneously, can seal by oneself after this application structure is annotated, can save sealed process in the electric core manufacture process, improve production efficiency.
In order to achieve the purpose, the embodiment of the utility model provides a power battery annotates liquid mouth seal structure, is applicable to square shell battery, including apron and seal valve assembly, the one end of apron is provided with annotates the liquid hole, the bottom of annotating the liquid hole is provided with the concave station with annotate the liquid hole intercommunication, seal valve assembly sets up in on the concave station;
the sealing valve assembly comprises a steel ball, an elastic piece and a fixing piece, wherein a through hole penetrating through the fixing piece is formed in the geometric center of the fixing piece, and the through hole is communicated with the liquid injection hole; the steel ball is arranged in one end of the through hole close to the liquid injection hole; the elastic piece is arranged in one end of the through hole, which is far away from the liquid injection hole, and the steel ball is abutted with the elastic piece; the fixing piece is arranged on the concave table.
In a preferred embodiment, the steel ball is in contact with the pour hole when the pour hole is in a non-pour state.
In a preferred embodiment, a plurality of independent side holes are formed in the side wall of the fixing member, and each side hole is respectively communicated with the through hole.
In a preferred embodiment, the hole diameter of the side hole is smaller than the diameter of the steel ball; the aperture of the side hole is smaller than the diameter of the elastic part.
In a preferred embodiment, the diameter of the steel ball is larger than the aperture of the liquid injection hole; the diameter of the concave platform is larger than the aperture of the liquid injection hole, and the concave platform is matched with the fixing piece.
In a preferred embodiment, the diameter of the through hole is larger than the diameter of the liquid injection hole, and the through hole is in interference fit with the steel ball and the elastic element respectively.
In a preferred embodiment, the concave platform is recessed toward the injection hole; the fixing piece is welded and fixed on the concave table.
In a preferred embodiment, the elastic member is a spring.
In a preferred embodiment, the side hole is a circular hole, an elliptical hole or a square hole.
In a preferred embodiment, the prismatic case battery is a lithium battery or a sodium battery.
By using the sealing structure for the liquid injection port of the power battery, when the power battery is in a non-liquid injection state, the steel ball blocks the liquid injection hole of the cover plate through the elasticity of the elastic piece; when electrolyte is injected into the battery cell through the electrolyte injection hole, the elastic piece contracts downwards (namely in the direction of the battery cell) due to external thrust, and at the moment, the steel ball moves downwards along with the contraction of the elastic piece, so that the electrolyte can be injected into the battery cell through the through hole and the side hole of the fixing piece; after the liquid injection is completed, the external thrust disappears, the elastic piece extends upwards due to the elasticity of the elastic piece, and the steel ball moves upwards along with the upward extension of the elastic piece so as to plug the liquid injection hole. Because this application structure makes electrolyte can only pour into to electric core inside from the outside into, and can't outwards flow out from electric core inside, consequently realize the one-way function that switches on of sealed valve subassembly.
This application can carry out the fluid infusion to electric core through seal valve assembly when electric core electrolyte is not enough through setting up sealed valve assembly, can seal again by oneself and annotate the liquid hole after annotating the liquid completion, has saved the sealed process after electric core annotates the liquid, effectively improves production efficiency. The structure has good reliability, and can avoid the problems of welding, fire explosion and the like; this application adopts one-way conduction's structure, need not laser welding sealed, and electrolyte can follow and annotate the outside electric core that pours into of liquid hole into, nevertheless can't flow from electric core inside, and the fluid infusion of the follow-up electric core of being convenient for and the sealing after the fluid infusion have effectively solved the not enough problem that needs the fluid infusion of electrolyte after electric core uses.
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 structural schematic diagram of a service state of a sealing structure of a liquid filling port of a power battery according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
fig. 3 is a schematic structural diagram of a sealing valve assembly of the sealing structure of the liquid filling opening of the power battery in fig. 1.
The objects, features and advantages of the present invention will be further explained with reference to the embodiments.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely in the following embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but 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 the case may be.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or 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, 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.
In the lithium ion power battery, the service life of the battery cell is directly influenced by the amount of the electrolyte; however, in order to pursue an extremely high energy density, the space inside the battery cell is often fully utilized, the storage space of the electrolyte is becoming smaller, and the battery cell needs to be continuously replenished with the electrolyte through the electrolyte injection hole after use. At present, the sealing mode of the liquid injection hole is mostly a laser welding mode; the problems of fire explosion, cracks easily appearing in welding seams and the like easily occur in laser welding after liquid injection, and the operation of supplementing electrolyte in the use process of the battery cell is inconvenient, so that the requirement of practical use is difficult to meet. Based on this, it is necessary to provide a sealing structure for a liquid filling opening of a power battery to solve the above problems.
Specifically, in order to achieve the above purpose, as shown in fig. 1 to 3, an embodiment of the present invention provides a sealing structure for a liquid injection port of a power battery, which is suitable for a square casing battery, and includes a cover plate 10 and a sealing valve assembly 20, wherein a liquid injection hole 11 is provided at one end of the cover plate 10, a concave platform 12 communicated with the liquid injection hole 11 is provided at the bottom of the liquid injection hole 11, and the sealing valve assembly 20 is provided on the concave platform 12;
the sealing valve assembly 20 comprises a steel ball 21, an elastic member 22 and a fixing member 23, a through hole 231 penetrating through the fixing member 23 is arranged at the geometric center of the fixing member 23, and the through hole 231 is communicated with the liquid injection hole 11; the steel ball 21 is arranged in one end of the through hole 231 close to the liquid injection hole 11; the elastic element 22 is arranged in one end of the through hole 231 far away from the liquid injection hole 11, and the steel ball 21 is abutted with the elastic element 22; the fixing member 23 is disposed on the concave stage 12.
In a preferred embodiment, the steel ball 21 is in contact with the pour hole 11 when the pour hole 11 is in a non-pour state.
In a preferred embodiment, a plurality of independent side holes 232 are disposed on the sidewall of the fixing member 23, and each of the side holes 232 is disposed to communicate with the through hole 231.
In a preferred embodiment, the diameter of the side hole 232 is smaller than the diameter of the steel ball 21; the side hole 232 has a smaller diameter than the diameter of the resilient member 22 (in the present embodiment, the resilient member 22 is a generally cylindrical resilient member).
In a preferred embodiment, the diameter of the steel ball 21 is larger than the diameter of the liquid injection hole 11; the diameter of the concave station 12 is larger than the aperture of the liquid injection hole 11, and the concave station 12 is matched with the fixing piece 23.
In a preferred embodiment, the diameter of the through hole 231 is larger than the diameter of the liquid injection hole 11, and the through hole 231 is in interference fit with the steel ball 21 and the elastic member 22, respectively.
In a preferred embodiment, the concave base 12 is recessed toward the pouring hole 11; the fixing member 23 is welded and fixed to the recessed table 12.
In a preferred embodiment, the elastic member 22 is a spring.
In a preferred embodiment, the side hole 232 is a circular hole, an elliptical hole, or a square hole.
In a preferred embodiment, the prismatic case battery is a lithium battery or a sodium battery.
By using the sealing structure for the liquid injection port of the power battery, when the power battery is in a non-liquid injection state, the steel ball blocks the liquid injection hole of the cover plate through the elasticity of the elastic piece; when electrolyte is injected into the battery cell through the electrolyte injection hole, the elastic piece contracts downwards (namely in the direction of the battery cell) due to external thrust, and at the moment, the steel ball moves downwards along with the contraction of the elastic piece, so that the electrolyte can be injected into the battery cell through the through hole and the side hole of the fixing piece; after the liquid injection is completed, the external thrust disappears, the elastic piece extends upwards due to the elasticity of the elastic piece, and the steel ball moves upwards along with the upward extension of the elastic piece so as to plug the liquid injection hole. Because this application structure makes electrolyte can only pour into to electric core inside from the outside into, and can't outwards flow out from electric core inside, consequently realize the one-way function that switches on of sealed valve subassembly.
This application can carry out the fluid infusion to electric core through seal valve assembly when electric core electrolyte is not enough through setting up sealed valve assembly, can seal again by oneself and annotate the liquid hole after annotating the liquid completion, has saved the sealed process after electric core annotates the liquid, effectively improves production efficiency. The structure has good reliability, and can avoid the problems of welding, fire explosion and the like; this application adopts one-way conduction's structure, need not laser welding sealed, and electrolyte can follow and annotate the outside electric core that pours into of liquid hole into, nevertheless can't flow from electric core inside, and the fluid infusion of the follow-up electric core of being convenient for and the sealing after the fluid infusion have effectively solved the not enough problem that needs the fluid infusion of electrolyte after electric core uses.
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 (10)
1. A sealing structure for a liquid injection port of a power battery is characterized by being suitable for a square shell battery and comprising a cover plate and a sealing valve assembly, wherein a liquid injection hole is formed in one end of the cover plate, a concave platform communicated with the liquid injection hole is formed in the bottom of the liquid injection hole, and the sealing valve assembly is arranged on the concave platform;
the sealing valve assembly comprises a steel ball, an elastic piece and a fixing piece, a through hole penetrating through the fixing piece is formed in the geometric center of the fixing piece, and the through hole is communicated with the liquid injection hole; the steel ball is arranged in one end of the through hole close to the liquid injection hole; the elastic piece is arranged in one end of the through hole, which is far away from the liquid injection hole, and the steel ball is abutted with the elastic piece; the fixing piece is arranged on the concave table.
2. The power battery liquid injection port sealing structure according to claim 1, wherein the steel ball abuts against the liquid injection hole when the liquid injection hole is in a non-liquid injection state.
3. The sealing structure for the liquid injection port of the power battery according to claim 1, wherein a plurality of independent side holes are formed in the side wall of the fixing member, and each side hole is communicated with the through hole.
4. The power battery electrolyte injection port seal structure of claim 3, wherein the aperture of the side hole is smaller than the diameter of the steel ball; the aperture of the side hole is smaller than the diameter of the elastic part.
5. The power battery liquid injection port sealing structure according to claim 1, wherein the diameter of the steel ball is larger than the aperture of the liquid injection hole; the diameter of the concave platform is larger than the aperture of the liquid injection hole, and the concave platform is matched with the fixing piece.
6. The power battery liquid injection port sealing structure according to claim 1, wherein the diameter of the through hole is larger than the aperture of the liquid injection hole, and the through hole is in interference fit with the steel ball and the elastic member respectively.
7. The sealing structure for the liquid filling port of the power battery according to claim 1, wherein the concave platform is recessed towards the direction close to the liquid filling hole; the fixing piece is welded and fixed on the concave table.
8. The sealing structure for the liquid filling port of the power battery as claimed in claim 1, wherein the elastic member is a spring.
9. The sealing structure for the liquid injection port of the power battery according to claim 3, wherein the side hole is a circular hole, an elliptical hole or a square hole.
10. The sealing structure for the liquid injection port of the power battery according to claim 1, wherein the square casing battery is a lithium battery or a sodium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223015600.4U CN218887489U (en) | 2022-11-11 | 2022-11-11 | Power battery annotates liquid mouth seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223015600.4U CN218887489U (en) | 2022-11-11 | 2022-11-11 | Power battery annotates liquid mouth seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218887489U true CN218887489U (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223015600.4U Active CN218887489U (en) | 2022-11-11 | 2022-11-11 | Power battery annotates liquid mouth seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218887489U (en) |
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2022
- 2022-11-11 CN CN202223015600.4U patent/CN218887489U/en active Active
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