A method for processing a battery cap

Abstract

The application relates to the technical field of battery assembly, in particular to a processing method of a battery cover cap, which comprises the following steps: S1, mold preparation, selecting a mold base, according to the shape and size of the required battery cover cap, adopting a milling processing mode to cut a required mold cavity shape on the mold base; S2, an injection molding step, placing the prepared mold on an injection molding machine, injecting an injection molding raw material into the mold cavity through the action of heating and pressure, cooling in the mold, taking out the mold when the plastic solidifies, and obtaining the cover cap; the application adopts an integrated injection molding manufacturing process, that is, the forming of the cover cap is completed at one time in the injection molding machine, compared with the traditional step-by-step processing and installation mode, the production and assembly process is greatly reduced, and the production efficiency is improved. Meanwhile, the two parts of the outer rubber ring and the gasket are formed by cutting and separating after installation, and the processing method can also optimize the production process.

Description

Technical Field

[0001] This invention relates to the field of battery component technology, and in particular to a method for processing a battery cap. Background Technology

[0002] The cap assembly of a lithium-ion battery is a critical component, affecting product safety and the personal safety of both producers and consumers. With the development of lithium-ion batteries, their applications in daily life are increasing, and their forms are becoming more diverse, such as prismatic lithium batteries, pouch lithium batteries, and cylindrical lithium batteries.

[0003] Cylindrical batteries typically consist of a battery casing, a circular cap, positive and negative electrodes, a separator, and an electrolyte. In existing technologies, the circular cap and the battery casing are in full-surface contact. The battery cap includes a sealing ring and a gasket. Traditional manufacturing methods involve manufacturing the sealing ring and gasket in steps, and then using a step-by-step assembly process to fix the sealing ring and gasket to complete the cap assembly. However, as described above, this manufacturing method is not only complex but also cumbersome in its assembly process, affecting the battery assembly efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings in the prior art by proposing a method for processing a battery cap.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Design a method for processing a battery cap, including the following steps:

[0007] S1. Mold preparation: Select the mold blank. Based on the required shape and size of the battery cap, milling is used to cut the mold cavity shape into the mold blank.

[0008] S2, Injection molding step: Place the mold prepared above on the injection molding machine, inject the injection molding material into the mold cavity through heating and pressure, and cool it in the mold. When the plastic solidifies, the mold can be removed to obtain the cap.

[0009] S3. Assembly step: Install the caps described above onto the corresponding battery components;

[0010] S4. Separation step: The cap on the battery assembly needs to be cut into two parts. A cutting tool can be used to divide the entire cap into an outer rubber ring and a gasket. The outer rubber ring is connected to the battery assembly, while the gasket is placed inside the outer rubber ring. After that, other components such as conductive parts can be installed as needed to complete the assembly of the cap.

[0011] Furthermore, it also includes a polishing step. After the cap obtained by injection molding in S2 is taken out, it is polished with polishing equipment to ensure that the outer wall of the cap is smooth and to avoid the presence of burrs.

[0012] Furthermore, in step S2, the injection temperature of the injection molding machine is 180-300℃, the injection pressure is 50-150MPa, and the injection speed is between 5-50cm / s.

[0013] Furthermore, in step S2, the cooling time of the cap is between 10 and 60 seconds, wherein the cooling environment is room temperature.

[0014] Furthermore, in step S4, the cutting tool employs a ring cutter, that is, it cuts an annular groove between the outer rubber ring and the washer to separate the outer rubber ring and the washer.

[0015] Furthermore, the lower surface of the washer is located below the outer rubber ring, wherein the annular cut portion extends downward along the outer rubber ring.

[0016] Furthermore, the width of the annular groove between the outer rubber ring and the washer is 1-2 mm.

[0017] Furthermore, the process also includes a testing step. After the separation step, the separation of the outer rubber ring and the gasket needs to be tested. If it is found that the outer rubber ring and the gasket are not completely separated, the entire cap should be removed and scrapped, a new cap should be installed, and the separation step should be repeated.

[0018] Furthermore, the scrapped products and the cut parts of the caps are collected and processed into raw material granules for reuse.

[0019] Furthermore, the inner side of the outer rubber ring has multiple annular grooves for accommodating conductive components and other parts.

[0020] The present invention proposes a method for processing battery caps, which has the following advantages: The invention employs an integrated injection molding process, meaning the cap is formed in one step within the injection molding machine. Compared to the traditional step-by-step processing and installation method, this significantly reduces the production assembly process and improves production efficiency. Furthermore, after installation, the cap is separated into an outer rubber ring and a gasket through cutting, further optimizing the production process.

[0021] Specifically, the traditional method of manufacturing caps requires the separate manufacture of the outer rubber ring and the gasket, followed by assembly. However, this invention uses an integrated injection molding method, which can complete the molding of the entire cap in one go, greatly simplifying the production process. This method can not only improve installation efficiency but also reduce the production assembly process and lower production costs. Attached Figure Description

[0022] Figure 1 The three-dimensional representation of the present invention before cutting Figure 1 ;

[0023] Figure 2 The three-dimensional representation of the present invention before cutting Figure 2 ;

[0024] Figure 3 The present invention is a three-dimensional representation after cutting. Figure 1 ;

[0025] Figure 4 The present invention is a three-dimensional representation after cutting. Figure 2 .

[0026] In the diagram: 1. Outer rubber ring; 2. Washer. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Example 1

[0029] Reference Figure 1-4 As one embodiment of the present invention, a method for processing a battery cap is disclosed, specifically including the following steps:

[0030] S1. Mold preparation: Select the mold blank. Based on the required shape and size of the battery cap, milling is used to cut the mold cavity shape into the mold blank.

[0031] S2, Injection molding step: Place the mold prepared above on the injection molding machine, inject the injection molding material into the mold cavity through heating and pressure, and cool it in the mold. When the plastic solidifies, the mold can be removed to obtain the cap.

[0032] S3. Assembly step: Install the caps described above onto the corresponding battery components;

[0033] S4. Separation step: The cap on the battery assembly needs to be cut into two parts. A cutting tool can be used to divide the entire cap into two parts: an outer rubber ring 1 and a gasket 2. The outer rubber ring 1 is connected to the battery assembly, while the gasket 2 is placed inside the outer rubber ring 1. After that, other components such as conductive parts can be installed as needed to complete the assembly of the cap.

[0034] Based on the above embodiments, the present invention also includes a polishing step. After the cap obtained by injection molding in S2 is taken out, it is polished using a polishing device to ensure that the outer wall of the cap is smooth and to avoid the presence of burrs.

[0035] In some embodiments, in step S2, the injection temperature of the injection molding machine is 180°C, the injection pressure ranges from 50 MPa, and the injection speed ranges from 5 cm / s.

[0036] Furthermore, in step S2 of this invention, the cooling time of the cap is between 10 seconds, and the cooling environment is room temperature.

[0037] Specifically, in step S4, the cutting tool adopts a ring cutting method, that is, a ring groove is cut between the outer rubber ring 1 and the washer 2 to separate the outer rubber ring 1 and the washer 2. Specifically, in this embodiment, the width of the ring groove between the outer rubber ring 1 and the washer 2 is 1-2 mm.

[0038] More specifically, the lower surface of the washer 2 is located below the outer rubber ring 1, wherein the annular cut portion extends downward along the outer rubber ring 1.

[0039] Furthermore, the present invention also includes a detection step. After the separation step, the separation of the outer rubber ring 1 and the gasket 2 needs to be detected. If it is found that the outer rubber ring 1 and the gasket 2 are not completely separated, the entire cap should be removed and scrapped, a new cap should be installed, and the separation step should be repeated.

[0040] In order to save production costs for enterprises by recycling waste film, this invention collects the cut parts of the scrapped products and caps, and processes them into raw material granules to achieve repeated use.

[0041] It should be noted that the inner side of the outer rubber ring 1 has multiple annular grooves for accommodating conductive components and other parts.

[0042] In summary, this invention employs a one-piece injection molding manufacturing process, where the cap is formed in a single injection molding machine. Compared to the traditional step-by-step processing and assembly method, this significantly reduces the production assembly process and improves production efficiency. Furthermore, after assembly, the cap is separated into an outer rubber ring and a gasket through cutting, which further optimizes the production process.

[0043] Specifically, the traditional method of manufacturing caps requires the separate manufacture of the outer rubber ring and the gasket, followed by assembly. However, this invention uses an integrated injection molding method, which can complete the molding of the entire cap in one go, greatly simplifying the production process. This method can not only improve installation efficiency but also reduce the production assembly process and lower production costs.

[0044] Example 2

[0045] In this embodiment, the similarities with Embodiment 1 will not be repeated. The difference is that in step S2 of this embodiment, the injection temperature of the injection molding machine is 240°C, the injection pressure range is 100MPa, and the injection speed range is between 27.5cm / s.

[0046] Furthermore, in step S2 of this invention, the cooling time of the cap is between 10 and 60 seconds, wherein the cooling environment is room temperature.

[0047] Specifically, in step S4, the cutting tool adopts a ring cutting method, that is, a ring groove is cut between the outer rubber ring 1 and the washer 2 to separate the outer rubber ring 1 and the washer 2. Specifically, in this embodiment, the width of the ring groove between the outer rubber ring 1 and the washer 2 is 1.5 mm.

[0048] Example 3

[0049] In this embodiment, the similarities with Embodiment 1 and Embodiment 2 will not be repeated. The difference is that in step S2 of this embodiment, the injection temperature of the injection molding machine is 300℃, the injection pressure range is 150MPa, and the injection speed range is between 50cm / s.

[0050] Furthermore, in step S2 of this invention, the cooling time of the cap is between 10 and 60 seconds, wherein the cooling environment is room temperature.

[0051] Specifically, in step S4, the cutting tool adopts a ring cutting method, that is, a ring groove is cut between the outer rubber ring 1 and the washer 2 to separate the outer rubber ring 1 and the washer 2. Specifically, in this embodiment, the width of the ring groove between the outer rubber ring 1 and the washer 2 is 2 mm.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for processing a battery cap, characterized in that, Includes the following steps: S1. Mold preparation: Select a mold blank, and according to the required shape and size of the battery cap, use milling to cut out the required mold cavity shape on the mold blank; S2, Injection molding step: Place the mold prepared above on the injection molding machine, inject the injection molding material into the mold cavity through heating and pressure, and cool it in the mold. When the plastic solidifies, the mold can be removed to obtain the cap. S3. Assembly step: Install the caps described above onto the corresponding battery components; S4. Separation Step: The cap on the battery assembly is cut into two parts using a cutting tool: an outer rubber ring and a gasket. The outer rubber ring is connected to the battery assembly, while the gasket is placed inside the outer rubber ring. After that, other components such as conductive parts are installed as needed to complete the assembly of the cap.

2. The method for processing a battery cap according to claim 1, characterized in that: It also includes a polishing step. After the cap obtained by injection molding in S2 is taken out, it is polished with polishing equipment to ensure that the outer wall of the cap is smooth and to avoid the presence of burrs.

3. The method for processing a battery cap according to claim 1, characterized in that: In step S2, the injection temperature of the injection molding machine is 180-300℃, the injection pressure is 50-150MPa, and the injection speed is 5-50cm / s.

4. The method for processing a battery cap according to claim 3, characterized in that: In step S2, the cooling time of the cap is between 10 and 60 seconds, and the cooling environment is room temperature.

5. The method for processing a battery cap according to claim 1, characterized in that: In step S4, the cutting tool uses a ring cutter, that is, it cuts an annular groove between the outer rubber ring and the washer to separate the outer rubber ring and the washer.

6. The method for processing a battery cap according to claim 5, characterized in that: The lower surface of the washer is located below the outer rubber ring, wherein the annular cut portion extends downward along the outer rubber ring.

7. A method for processing a battery cap according to claim 5, characterized in that: The width of the annular groove between the outer rubber ring and the washer is 1-2 mm.

8. The method for processing a battery cap according to claim 1, characterized in that: It also includes a testing step. After the separation step, the separation of the outer rubber ring and the gasket needs to be tested. If the outer rubber ring and the gasket are found to be incompletely separated, the entire cap should be removed and scrapped, a new cap should be installed, and the separation step should be repeated.

9. A method for processing a battery cap according to claim 8, characterized in that: The scrapped products and the cut parts of the caps are collected and processed into raw material granules for reuse.

10. A method for processing a battery cap according to any one of claims 1-9, characterized in that: The inner side of the outer rubber ring has multiple annular grooves to accommodate conductive components and other parts.

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