Battery liquid injection buckle cover structure

Abstract

The utility model relates to a battery liquid injection buckle cover structure, relates to the technical field of battery manufacturing, and aims to solve the problem that electrolyte flows out of a liquid injection port in the liquid injection process, the battery liquid injection buckle cover structure comprises a buckle cover main body arranged on a battery cover plate, and a butt joint hole used for being in butt joint with a liquid injection hole is formed in the buckle cover main body in a penetrating mode. The buckle cover comprises a buckle cover body, an insertion and extraction mechanism used for insertion and extraction is arranged on the buckle cover body, the buckle cover body comprises a hard part and a silica gel part, the silica gel part is connected into the hard part, a binding frame used for restraining deformation of the silica gel part is arranged in the hard part, the insertion and extraction mechanism is connected to the binding frame, and the insertion and extraction mechanism comprises a plurality of insertion and extraction rods. The multiple inserting and pulling rods are all connected to the outer wall of the edge bundling frame and are sequentially arranged in the circumferential direction of the edge bundling frame. The sealing structure has the effect of improving the sealing performance.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery manufacturing, in particular to a battery liquid injection cover structure. BACKGROUND

[0002] In the manufacturing process of a lithium ion battery, liquid injection is a crucial link, the lithium ion battery is composed of a positive electrode, a negative electrode, a diaphragm and an electrolyte and the like, and injection of the electrolyte is directly related to the performance and safety of the battery; with the continuous progress of battery technology and the continuous improvement of energy density, the requirement for the battery liquid injection process is increasingly strict, while higher energy density is pursued, the internal structure of the battery becomes more compact, and the design of the liquid injection hole and the surrounding structure faces greater challenges.

[0003] In the related art, especially during the liquid injection process or after the liquid injection is completed, due to the change of the internal pressure of the battery, the non-uniformity of the electrolyte flow or the insufficient sealing performance of the battery shell, the phenomenon that the electrolyte flows out of the liquid injection hole often occurs, which not only wastes valuable electrolyte resources, but more seriously, the flowing electrolyte forms lithium salt crystals on the battery cover plate, the pole and the surrounding area, the crystal substances are corrosive and may cause damage to the internal structure of the battery, thereby affecting the performance and service life of the battery, and thus need to be improved. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problem that the electrolyte flows out of the liquid injection hole during the liquid injection process, the application provides a battery liquid injection cover structure.

[0005] The battery liquid injection cover structure provided by the application adopts the following technical scheme:

[0006] A battery liquid injection cover structure comprises a cover main body arranged on a battery cover plate, a butt joint hole for butt joint with a liquid injection hole is provided through the cover main body, a plug-in mechanism for plug-in is arranged on the cover main body, the cover main body comprises a hard part and a silica gel part, the silica gel part is connected in the hard part, a binding frame for restraining deformation of the silica gel part is arranged in the hard part, the plug-in mechanism is connected on the binding frame, the plug-in mechanism comprises a plurality of plug-in rods, the plurality of plug-in rods are connected on the outer wall of the binding frame, and the plurality of plug-in rods are arranged in the circumferential direction of the binding frame in sequence.

[0007] Due to the change of the internal pressure of the battery during or after the liquid injection, the unevenness of the electrolyte flow or the insufficient sealing performance of the battery shell, the phenomenon of electrolyte flowing out of the liquid injection port often occurs, which not only wastes valuable electrolyte resources, but more seriously, the flowing electrolyte forms lithium salt crystals on the battery cover plate, the pole and the surrounding area. These crystalline substances are corrosive and may cause damage to the internal structure of the battery, affecting the performance and life of the battery; by adopting the above technical scheme, the cover body is installed on the battery cover plate, the butt joint hole is opened on the cover body, the cover body includes a hard part and a silica gel part; when the battery is injected, the cover body is taken out, the outside is a hard material (such as plastic or metal), and the inside is embedded with a silica gel part. The cover body is aligned with the liquid injection hole on the battery cover plate to ensure that the butt joint hole on the cover body is accurately butt jointed with the liquid injection hole. Gently press the cover body to make it completely adhere to the battery cover plate. In this process, the silica gel part inside the cover is tightly filled around the liquid injection hole under the constraint of the bezel to form an effective seal. At the same time, the plug rod cooperates with the battery cover plate to realize fixation. After confirming that the cover body is firmly installed, the injection operation is started. After the injection is completed, the electrolyte is fully penetrated and stable, and the cover body is pulled out and separated from the battery cover plate. Carefully check whether there is electrolyte residue or lithium salt crystal formation around the battery cover plate. If necessary, use appropriate cleaning agent for cleaning. At the same time, check whether the cover body is intact for the next repeated use; through the cover body and the plug-in mechanism, the risk of electrolyte leakage from the liquid injection hole during the injection process or during the use of the battery is significantly reduced, the sealing performance is improved, thereby reducing the waste of electrolyte and environmental pollution, and prolonging the service life and safety of the battery. At the same time, the cover body can be reused, and the plug-in is simple and easy to operate.

[0008] Optionally, the diameter of each plug rod increases sequentially from the silica gel part to the hard part.

[0009] By adopting the above technical scheme, the diameter of the plug rod increases sequentially from the silica gel part to the hard part; through the setting of the diameter of the plug rod, when the cover body contacts and is pressed tightly with the battery cover plate, the plug rod can more effectively penetrate and tightly adhere to the surface of the battery cover plate, improving the stability of the installation of the cover body.

[0010] Optionally, a sealing groove is opened at the bottom of the bezel, and the bezel is provided with a sealing rubber strip embedded in the sealing groove.

[0011] By adopting the technical scheme, the sealing groove is arranged on the bundle frame, and the sealing rubber strip is embedded in the sealing groove; through the arrangement of the sealing groove and the sealing rubber strip, a second resealing guarantee is provided between the buckle cover body and the battery cover plate, the reliability and stability of the sealing are greatly improved, and the risk of electrolyte leakage is further reduced.

[0012] Optionally, a positioning notch for guiding is arranged through the bottom of the bundle frame, and a half-arc-shaped opening section of the positioning notch is in communication with the inner wall of the sealing groove.

[0013] By adopting the technical scheme, the positioning notch is arranged on the bundle frame; through the arrangement of the positioning notch, the positioning notch serves as positioning and guiding, so that the buckle cover body can be accurately aligned with the corresponding structure (such as a liquid injection port, a positioning column or the like) on the battery cover plate during the installation process, the installation process is simplified, the installation efficiency and accuracy are improved, and the risk of sealing failure or damage due to improper installation is reduced.

[0014] Optionally, a cross-shaped rib part for increasing structural strength is arranged on the silica gel part, and the cross-shaped rib part is integrally formed on the bottom of the silica gel part.

[0015] By adopting the technical scheme, the cross-shaped rib part is integrally formed on the bottom of the silica gel part; through the arrangement of the cross-shaped rib part, the overall strength and rigidity of the silica gel part can be significantly improved, the cross-shaped rib part can effectively disperse and resist external force when force is applied, and deformation or rupture of the silica gel part is prevented.

[0016] Optionally, a plug is arranged on the surface of the hard part for plugging, and the plug is plugged at the opening of the inner wall of the connecting hole.

[0017] By adopting the technical scheme, the plug is plugged at the connecting hole of the hard part; through the arrangement of the plug, the connecting hole can be plugged, external dirt, dust or moisture and the like can be prevented from entering the battery, and the cleanliness of the battery is ensured.

[0018] Optionally, a flexible band is arranged on the surface of the hard part for preventing loss, one end of the flexible band is connected to the plug, and the other end of the flexible band is connected to the hard part.

[0019] By adopting the technical scheme, one end of the flexible band is fixedly connected to the plug, and the other end of the flexible band is fixedly connected to the hard part; through the arrangement of the flexible band, the main function of the flexible band is to connect the plug and the hard part, and a stable connection system is formed, so that the plug is not easy to accidentally fall off or be lost during operation or transportation, and the reliability and usability of the plug are ensured.

[0020] Optionally, a chamfer is provided on the outer wall of the hard part, and the chamfer is provided at each corner of the hard part. The hard part is also provided with an anti-slip texture for increasing friction, and the anti-slip texture is provided along the circumferential direction of the hard part.

[0021] By adopting the above technical solution, chamfers are opened at the corners of the hard part, and anti-slip textures are integrally formed on the hard part; through the setting of chamfers and anti-slip textures, the chamfer design can eliminate the sharp edges at the corners of the hard part, reducing the risk of injury to personnel during transportation, installation or use. At the same time, the anti-slip texture can effectively increase the friction of the surface of the hard part, making it more stable and reliable when holding or operating.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] The buckle cover body and the plug-in plate mechanism significantly reduce the risk of electrolyte leakage from the injection hole during the injection process or battery use, improve the sealing performance, thereby reducing electrolyte waste and environmental pollution, and extending the service life and safety of the battery. At the same time, the buckle cover body is reusable, easy to plug and unplug, and easy to operate;

[0024] The positioning notch serves as a positioning and guide to ensure that the buckle cover body is accurately aligned with the corresponding structure on the battery cover (such as the liquid filling port, positioning column, etc.) during installation, thereby simplifying the installation process, improving the efficiency and accuracy of installation, and reducing the risk of seal failure or damage due to improper installation.

[0025] By setting the plug, the docking hole can be sealed, reducing the entry of external dirt, dust or moisture into the battery, thereby ensuring the cleanliness of the battery interior. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a battery liquid filling cover structure in an embodiment of the present application.

[0027] Figure 2 It is a structural diagram for reflecting the blocking plug and the flexible binding band in the embodiment of the present application.

[0028] Figure 3 This is a bottom view of a battery filling cover structure in an embodiment of the present application.

[0029] Figure 4 It is a structural diagram used to reflect the plug-in mechanism in the embodiment of the present application.

[0030] Explanation of reference signs: 1, buckle cover body; 11, hard part; 12, silica gel part; 2, battery cover plate; 3, butt joint hole; 4, plug-in mechanism; 41, plug-in rod; 5, binding frame; 51, sealing groove; 52, sealing rubber strip; 53, positioning notch; 6, cross rib part; 7, plug; 71, flexible strap; 8, chamfer; 9, anti-slip texture. DETAILED DESCRIPTION

[0031] The following will be described in detail in combination with the accompanying drawings. Figures 1-4 The present application is further described in detail.

[0032] The present application discloses a battery liquid injection buckle cover structure. Referring to Figure 1 , the battery liquid injection buckle cover structure comprises a buckle cover body 1, the buckle cover body 1 is installed on a battery cover plate 2, and a butt joint hole 3 is provided through the buckle cover body 1. In the embodiment, the butt joint hole 3 is butt jointed with a liquid injection hole of the battery cover plate 2.

[0033] Referring to Figure 1 and Figure 3 , the buckle cover body 1 comprises a hard part 11 and a silica gel part 12, the silica gel part 12 is installed in the hard part 11. In the embodiment, the hard part 11 can be made of hard materials such as plastic or metal. The hard material has high strength and durability, can withstand large pressure and impact, and can protect the internal structure and components from damage. At the same time, the silica gel part 12 can be made of silica gel material, which can be used for a long time without deformation, expansion or melting in high temperature environment, and is suitable for occasions requiring high temperature resistance.

[0034] Referring to Figure 2 , the hard part 11 is provided with a plug 7, the plug 7 can be made of rubber material, the plug 7 is sealed on the inner wall of the butt joint hole 3, the flexible strap 71 is glued and fixed on the surface of the hard part 11, and the plug 7 is glued and fixed on the flexible strap 71. The plug 7 can seal the butt joint hole 3, reduce the entry of external dirt, dust or moisture into the battery, and at the same time, the main function of the flexible strap 71 is to connect the plug 7 and the hard part 11 to form a stable connection system. Even in the process of operation or transportation, the plug 7 is not easy to accidentally fall off or lose, which ensures the reliability and usability of the plug 7.

[0035] Referring to Figure 2 , a plurality of chamfers 8 are provided on the outer part of the hard part 11, and the plurality of chamfers 8 are respectively provided at each corner of the hard part 11. The design of the chamfer 8 can eliminate the sharp edges at the corners of the hard part 11, and reduce the risk of causing harm to personnel during handling, installation or use.

[0036] Referring to Figure 2The hard part 11 is externally integrally formed with anti-skid texture 9, which is arranged along the circumferential direction of the hard part 11. The anti-skid texture 9 can effectively increase the friction of the surface of the hard part 11, making it more stable and reliable when holding or operating.

[0037] Referring to Figure 3 The bottom of the silica gel part 12 is integrally formed with a cross-shaped rib 6, which significantly improves the overall strength and rigidity of the silica gel part 12. When subjected to force, the cross-shaped rib 6 can effectively disperse and resist external force, preventing the silica gel part 12 from deforming or breaking.

[0038] Referring to Figure 3 The hard part 11 is internally fixedly installed with a binding frame 5, and the silica gel part 12 is located within the binding frame 5. In this embodiment, the binding frame 5 is used to constrain the deformation of the silica gel part 12. The bottom of the binding frame 5 is provided with a positioning notch 53. In this embodiment, the opening cross-section of the positioning notch 53 is semicircular. The battery cover plate 2 has a semicircular block that cooperates with it, ensuring that the buckle cover body 1 is accurately aligned with the corresponding structure (such as the liquid injection port, positioning column, etc.) on the battery cover plate 2 during installation, simplifying the installation process, improving the efficiency and accuracy of installation, and reducing the risk of sealing failure or damage due to improper installation.

[0039] Referring to Figure 3 The bottom of the binding frame 5 is provided with a sealing groove 51, and the binding frame 5 is also installed with a sealing rubber strip 52, which is embedded in the sealing groove 51. This can provide a second resealing guarantee between the buckle cover body 1 and the battery cover plate 2, greatly improving the reliability and stability of the sealing, and further reducing the risk of electrolyte leakage.

[0040] Referring to Figure 3 and Figure 4 Meanwhile, the binding frame 5 is externally installed with a plug-in mechanism 4. In this embodiment, the plug-in mechanism 4 is used to fix the buckle cover body 1 and the battery cover plate 2. The plug-in mechanism 4 includes a plurality of plug-in rods 41, which are semicircular in this embodiment. The plug-in rods 41 are fixedly installed on the outer wall of the binding frame 5 and are arranged in the circumferential direction of the binding frame 5. Each plug-in rod 41 extends outward. The battery cover plate 2 has a through hole for installing the plug-in rod 41.

[0041] Referring to Figure 4 The diameter of each plug-in rod 41 increases in the direction from the silica gel part 12 to the hard part 11, so that when the buckle cover body 1 contacts and is pressed against the battery cover plate 2, the plug-in rod 41 can more effectively penetrate and tightly fit the surface of the battery cover plate 2, improving the stability of the installation of the buckle cover body 1.

[0042] The implementation principle of the battery liquid injection cover structure embodiment of the application is as follows: when the battery is liquid injected, the cover main body 1 is taken out, the cover main body 1 is aligned with the liquid injection hole on the battery cover plate 2, the butt joint hole 3 on the cover main body 1 is accurately butt jointed with the liquid injection hole, the cover main body 1 is gently pressed to completely adhere to the battery cover plate 2, in this process, the silica gel part 12 in the cover is tightly filled around the liquid injection hole under the constraint of the bundle frame 5 to form an effective seal, meanwhile, the plug rod 41 cooperates with the battery cover plate 2 to realize fixation, after confirming that the cover main body 1 is firmly installed, the liquid injection operation is started, after the liquid injection is completed, the electrolyte is fully penetrated and stable, the cover main body 1 is pulled and pushed outward to separate from the battery cover plate 2, whether there is electrolyte residue or lithium salt crystallization around the battery cover plate 2 is carefully checked, if necessary, a suitable cleaning agent is used for cleaning, at the same time, whether the cover main body 1 is intact is checked to facilitate the reuse next time; through the cover main body 1 and the plug plate mechanism, the risk of electrolyte leakage from the liquid injection hole during the liquid injection process or the battery use is significantly reduced, the sealing performance is improved, thereby reducing the electrolyte waste and environmental pollution, and prolonging the service life and safety of the battery, at the same time, the cover main body 1 can be reused, the plug is simple, and the operation is convenient.

[0043] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A battery filling cover structure, characterized by: The invention comprises a buckle cover body (1) arranged on a battery cover plate (2), a docking hole (3) for docking with a liquid injection hole being formed through the buckle cover body (1), a plug-in mechanism (4) for plugging and unplugging being provided on the buckle cover body (1), the buckle cover body (1) comprising a hard part (11) and a silicone part (12), the silicone part (12) being connected to the hard part (11), a binding frame (5) for constraining deformation of the silicone part (12) being provided in the hard part (11), the plug-in mechanism (4) being connected to the binding frame (5), the plug-in mechanism (4) comprising a plurality of plug-in rods (41), the plurality of plug-in rods (41) being connected to the outer wall of the binding frame (5), and the plurality of plug-in rods (41) being arranged in sequence along the circumferential direction of the binding frame (5).

2. The battery filling cover structure according to claim 1, characterized in that: The diameter of each plugging rod (41) increases in sequence from the silicone portion (12) toward the hard portion (11).

3. The battery filling cover structure according to claim 1, characterized in that: A sealing groove (51) is provided at the bottom of the frame (5), and a sealing strip (52) for sealing is provided on the frame (5), and the sealing strip (52) is embedded in the sealing groove (51).

4. The battery filling cover structure according to claim 3, characterized in that: A positioning notch (53) for guiding is provided through the bottom of the beam frame (5); the cross section of the positioning notch (53) is semi-arc-shaped; the positioning notch (53) is communicated with the inner wall of the sealing groove (51).

5. The battery filling cover structure according to claim 1, characterized in that: The silicone part (12) is provided with a cross rib part (6) for increasing structural strength, and the cross rib part (6) is integrally formed at the bottom of the silicone part (12).

6. The battery filling cover structure according to claim 1, characterized in that: The surface of the hard portion (11) is provided with a plug (7) for blocking the opening, and the plug (7) is sealed at the opening of the inner wall of the docking hole (3).

7. The battery filling cover structure according to claim 6, characterized in that: The surface of the hard part (11) is provided with a flexible binding belt (71) for preventing loss, one end of the flexible binding belt (71) is connected to the plug (7), and the other end of the flexible binding belt (71) is connected to the hard part (11).

8. The battery filling cover structure according to claim 1, characterized in that: The outer wall of the hard part (11) is provided with a chamfer (8), and the chamfer (8) is provided at each corner of the hard part (11). The hard part (11) is also provided with an anti-skid texture (9) for increasing friction, and the anti-skid texture (9) is provided along the circumferential direction of the hard part (11).

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