A processing technology for a battery cap assembly, a battery cap assembly, and a battery

Abstract

A processing technology of a battery cap assembly, the battery cap assembly and the battery. Since the annular spacer rubber ring is no longer used, it is also no longer necessary to align the positioning groove on the side wall of the annular spacer rubber ring with the through hole on the circuit board, greatly reducing the assembly difficulty of the battery cap assembly and improving the assembly efficiency. In addition, since multiple battery cap assemblies are directly formed on the same circuit board plate, the assembly efficiency of the battery cap assembly is further improved, realizing mass production. In addition, the resin perfusion is directly completed by injection molding, and the situation of overfilling or underfilling will not occur, greatly avoiding the scrap rate of the battery cap assembly.

Description

Technical Field

[0001] The present invention relates to a processing technology of a battery cap assembly, a battery cap assembly obtained by the processing technology of the battery cap assembly, and a battery having the battery cap assembly. Background Art

[0002] With the development of the economy and the continuous improvement of people's living standards, portable mobile devices (such as video cameras, digital cameras, and laptop computers, etc.) have been more and more widely used, creating a good platform for the development of the battery industry. As one of many batteries, lithium batteries are increasingly favored by people because of their high energy density and various excellent performances. In particular, a 1.5V battery composed of a lithium-ion battery cell, a steel shell, and a cap-shaped management circuit assembly has high-performance and environmental protection advantages in replacing disposable dry batteries and has been more and more widely used.

[0003] Existing steel shell lithium-ion battery cells have advantages such as simple production process and low cost, but they do not have a battery circuit and cannot directly replace existing cylindrical batteries for use. To enable it to replace cylindrical batteries, a cap assembly with a battery circuit can be provided, and by installing and fixing the cap assembly on the top of the steel shell lithium-ion battery cell, it can directly replace cylindrical batteries for use.

[0004] Existing battery cap assemblies, such as Figures 1 to 3As shown in the figure, during assembly, the annular rubber separating ring 101, the circuit board 102 with components, and the annular insulating ring 103 need to be successively installed into the metal annular housing 104 made of conductive material. Subsequently, through a stamping process, the two end edges of the metal annular housing 104 are turned inward to press the stacked annular rubber separating ring 101, circuit board 102, and annular insulating ring 103 tightly within the metal annular housing 104. Then, an adhesive layer is filled between the side of the circuit board 102 with components and the end face of the metal annular housing 104 to prevent the components on the circuit board 102 from being corroded. To enable the battery to work properly, it is necessary to timely discharge the gas inside the battery to avoid explosion. Therefore, a ventilation hole 106 is provided on the circuit board 102, and a groove 105 is provided on the outer side wall of the annular rubber separating ring 101. The groove 105 on the annular rubber separating ring 101 is aligned with the ventilation hole on the circuit board 102 to form an exhaust channel. However, during the assembly of the annular rubber separating ring 101 and the circuit board 102, due to the influence of the inner wall structure and size of the metal annular housing 104, it is difficult for the assembled annular rubber separating ring 101 or circuit board 102 to rotate, resulting in the groove 105 on the annular rubber separating ring 101 not being easily aligned with the ventilation hole on the circuit board 102, with high assembly difficulty and low assembly efficiency. In addition, since it is not easy to control the amount of glue during glue filling, when too much glue is filled, it is easy to block the groove 105 on the annular rubber separating ring 101 and the ventilation hole on the circuit board 102, while when too little glue is filled, it cannot wrap the components on the circuit board 102, leading to the components being easily corroded. In addition, after glue filling, it is also necessary to wait for the glue to dry, which also results in a reduction in assembly efficiency. Summary of the Invention

[0005] The present invention aims to provide a battery cap assembly processing technology with simpler assembly, as well as a battery cap assembly obtained through this battery cap assembly processing technology and a battery having this battery cap assembly, so as to improve the production and assembly efficiency of the battery cap assembly.

[0006] The processing technology of a battery cap assembly according to the present invention is as follows:

[0007] 1) Punch out a plurality of circuit board bodies suitable for the battery cap assembly on a circuit board sheet, and make each circuit board body still clamped on the circuit board sheet around it and not fall off;

[0008] 2) Provide glue-passing through holes on each circuit board body of the circuit board sheet in step 1), and set the positive electrode end on one side of each circuit board body through the chip mounting process, and set the steel ring, the electrode post connected to the positive electrode of the battery cell, and the electronic components on the other side of each circuit board body through the chip mounting process. The electronic components and the electrode post are both framed within the inner ring of the steel ring;

[0009] 3) Place the entire circuit board sheet in step 2) into a mold. By means of injection molding, inject insulating glue into the mold cavity. The insulating glue fills the inner ring of the steel ring to form an insulating glue block that completely wraps and covers the electronic components. The insulating glue also flows through the glue passing through holes to the side of the circuit board body with the positive electrode end and completely wraps and covers the part except the positive electrode end to form a single-voltage battery cap assembly, or the insulating glue also flows through the glue passing through holes to the side of the circuit board body with the positive electrode end and forms two spaced insulating rings on the surface of this side to form a dual-voltage battery cap assembly; wherein, the end of the electrode post is not covered by the insulating glue block, and at the same time, the exhaust structure on each battery cap assembly should also be avoided from being blocked;

[0010] 4) Cool, demold, and take out the entire circuit board sheet in step 3).

[0011] A battery cap assembly according to the present invention includes a circuit board body. A positive electrode end is provided on the upper surface of the circuit board body, and a steel ring is provided on the lower surface of the circuit board body. An electrode post connected to the positive electrode of the battery cell and electronic components are also provided in the inner ring of the steel ring and on the circuit board body; glue passing through holes for the insulating glue to pass through are provided on the circuit board body. An insulating glue block that fills the inner ring of the steel ring and completely wraps and covers the electronic components is formed by injection molding in the inner ring of the steel ring. Wherein, the end of the electrode post is exposed, and an insulating glue layer formed by the insulating glue is formed by injection molding on the upper surface of the circuit board body around the positive electrode end to form a single-voltage battery cap assembly, or two spaced insulating rings formed by the insulating glue are formed by injection molding on the upper surface of the circuit board body around the positive electrode end to form a dual-voltage battery cap assembly.

[0012] A battery according to the present invention includes a steel shell and a battery cell, and also includes the above battery cap assembly. The battery cell is arranged in the steel shell, the positive electrode of the battery cell is connected to the electrode post in the battery cap assembly, the battery cap assembly is tightly covered at the port of the steel shell by interference fit to package the battery cell in the steel shell, and an exhaust hole is formed between the plane on the steel ring of the battery cap assembly and the inner wall of the steel shell.

[0013] A processing technology for a battery cap assembly according to the present invention forms multiple battery cap assemblies on the same circuit board sheet at the same time, realizing batch production of the battery cap assemblies, improving production efficiency. At the same time, by adopting the above processing technology, it is possible to avoid assembling an annular rubber spacer inside the metal annular housing, simplifying the assembly steps of the battery cap assembly. And since the annular rubber spacer is no longer used, there is no need to align the positioning groove on the side wall of the annular rubber spacer with the through holes on the circuit board, greatly reducing the assembly difficulty of the battery cap assembly and improving the assembly efficiency. In addition, the pouring of the insulating glue is directly completed by injection molding, and there will be no situation of over-pouring or under-pouring, greatly avoiding the scrap rate of the battery cap assembly; when injecting glue into the battery cap assembly, the exhaust structure on it has been pre-treated and will not be blocked, so there is no need to worry about the insulating glue blocking the exhaust structure during glue pouring, which can speed up the glue pouring efficiency.

[0014] And a battery cap assembly and a battery according to the present invention, wherein the battery cap assembly is made by the above processing technology, so the production efficiency is high. And the battery cap assembly and the steel shell are assembled and connected by interference fit. After assembly, there is no need to use spot welding to fix the battery cap assembly and the steel shell, reducing the assembly process, with a simple assembly method, high assembly efficiency, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an exploded schematic view of the existing structure of the battery cap assembly.

[0016] Figure 2 and Figure 3 It is an assembled schematic view of the existing structure of the battery cap assembly.

[0017] Figure 4 It is a schematic view of the structure of the circuit board sheet in the present invention.

[0018] Figure 5 It is a schematic view of the structure of a single circuit board body in the present invention.

[0019] Figure 6 and Figure 7 It is a schematic view of the circuit board sheet with the positive electrode end, steel ring, electrode post, and electronic components attached.

[0020] Figure 8 It is a schematic view of the structure of a single-voltage battery cap assembly in the present invention.

[0021] Figure 9 It is a schematic view of the structure of a dual-voltage battery cap assembly in the present invention.

[0022] Figure 10 It is a schematic view of the battery structure in the present invention.

[0023] Figure 11 It is a schematic view of the structure of the metal cap in the present invention. Detailed implementation mode

[0024] A processing technology for a battery cap assembly is as follows: (1) Punch out a plurality of circuit board bodies 2 suitable for the battery cap assembly on a circuit board sheet 1, and make each circuit board body 2 still clamped on the circuit board sheet 1 around it and not fall off; among them, the structure for making the circuit board body 2 still clamped on the circuit board sheet 1 and not fall off is: a positioning groove 3 is arranged on the outer ring wall of each circuit board body 2, and a protrusion is arranged on the wall surface of each through hole for clamping the circuit board body 2 on the circuit board sheet 1. The protrusion on each through hole cooperates with the positioning groove 3 on the outer ring wall of the circuit board body 2 clamped therein, which can not only prevent the circuit board body 2 from falling off, but also realize the positioning of the circuit board body 2 when it returns to its position, ensuring the smooth progress of subsequent chip mounting, as Figure 4 shown. (2) A glue-passing through hole 4 is arranged on each circuit board body 2 of the circuit board sheet 1 in step (1), and a positive electrode end 5 is arranged on one side of each circuit board body 2 by chip mounting technology, and a steel ring 6, an electrode post 7 connected to the positive electrode of the battery cell, and electronic components are arranged on the other side of each circuit board body 2 by chip mounting technology. The electronic components and the electrode post 7 are both framed in the inner ring of the steel ring 6, as Figures 5 to 7 shown; (3) Put the whole circuit board sheet 1 in step (2) into a mold, and inject insulating glue into the mold cavity by injection molding. The insulating glue fills the inner ring of the steel ring 6 to form an insulating glue block that completely wraps and covers the electronic components. The insulating glue also flows to the side of the circuit board body 2 with the positive electrode end 5 through the glue-passing through hole 4 and completely wraps and covers the part except the positive electrode end 5 to form a single-voltage battery cap assembly 9, or the insulating glue also flows to the side of the circuit board body 2 with the positive electrode end 5 through the glue-passing through hole 4 and forms two spaced insulating rings 10 on the surface of this side to form a dual-voltage battery cap assembly 11; among them, the end of the electrode post 7 is not covered by the insulating glue block. At the same time, it is also necessary to avoid blocking the exhaust structure on each battery cap assembly; because the end of the electrode post 7 needs to be connected to the positive electrode of the battery cell 12 to realize the management of battery charging and discharging by the battery management circuit in the battery cap assembly, the end of the electrode post 7 cannot be covered. As for how to process the exhaust structure in advance during the injection molding process to avoid blocking the exhaust structure during the injection molding process, this operation belongs to the prior art. Those skilled in the art can easily think of how to avoid blocking the exhaust structure during the injection molding process based on this case and combining the common knowledge in the field; (4) Cool, demold, and take out the whole circuit board sheet 1 in step (3).

[0025] A battery cap assembly includes a circuit board body 2. A positive terminal 5 is arranged on the upper surface of the circuit board body 2, and a steel ring 6 is arranged on the lower surface of the circuit board body 2. An electrode post 7 connected to the positive electrode of the battery cell 12 and electronic components are also arranged in the inner ring of the steel ring 6 and on the circuit board body 2. A glue passing through hole 4 for insulating glue is arranged on the circuit board body 2. An insulating glue block that fills the inner ring of the steel ring 6 and completely wraps and covers the electronic components is formed by injection molding in the inner ring of the steel ring 6. Among them, the end of the electrode post 7 is exposed, and an insulating glue layer 13 formed by insulating glue is formed by injection molding on the upper surface of the circuit board body 2 around the positive terminal 5 to form a single-voltage battery cap assembly 9, as Figure 8 shown, or two insulating rings 10 formed by insulating glue and arranged at intervals around the positive terminal 5 are formed by injection molding on the upper surface of the circuit board body 2 to form a dual-voltage battery cap assembly 11, as Figure 9 shown. Among them, the number of the glue passing through holes 4 is at least one, and it is reasonably set according to actual needs.

[0026] An exhaust structure is arranged on each battery cap assembly. The exhaust structure can be a plane 8 arranged on the outer side wall of the steel ring. When the battery cap assembly is assembled at the port of the steel shell, the outer edge of the steel ring (except at the plane 8) is in interference fit and abuts against the inner wall of the steel shell, while an exhaust hole is formed between the plane 8 on the steel ring and the inner wall of the steel shell, effectively ensuring the safety during the use of the battery.

[0027] The outer diameter of the steel ring 6 is smaller than the diameter of the circuit board body 2. After the two are assembled into one body, a stepped shape is formed between the outer edge of the steel ring 6 and the outer edge of the circuit board body 2. Through the above structure, when assembling the battery cap assembly and the steel shell, the lower surface of the circuit board body 2 can be abutted against the port of the steel shell, avoiding that the whole battery cap assembly is not restricted and overly enters the interior of the steel shell when assembling the two; at the same time, directly forming a stepped shape between the outer edge of the steel ring 6 and the outer edge of the circuit board body 2 also avoids machining a stepped surface on the outer edge of the steel ring 6, further simplifying the process, improving the processing and assembly efficiency, and reducing the processing cost; in addition, the above structure also facilitates taking out the processed battery cap assembly from the whole circuit board plate 1.

[0028] As Figure 11 shown, when the battery cap assembly is a single-voltage battery cap assembly 9, its positive terminal 5 is a horn-shaped metal cap 14. A plurality of light-transmitting windows 16 are arranged at intervals on the metal cap 14. The insulating glue layer 13 completely covers the plurality of light-transmitting windows 16 on the metal cap 14. An indicator light is arranged below the metal cap 14 and on the circuit board body 2. Since the insulating glue layer 13 can transmit light, the light of the indicator light can penetrate the insulating glue layer 13 after passing through the light-transmitting windows 16. By the flashing or different colors of the indicator light, the charging and discharging conditions are prompted. Among them, the circuit connection of the indicator light on the circuit board body 2 is the prior art.

[0029] When the battery cap assembly is the dual-voltage battery cap assembly 11, an indicator light is provided below the insulating ring 10 and on the circuit board body 2. Since the material of the insulating ring 10 can transmit light, the light of the indicator light can penetrate the insulating ring 10. The charging and discharging conditions are prompted by the flashing or different colors of the indicator light. Among them, the circuit connection of the indicator light on the circuit board body 2 is prior art.

[0030] A battery, as Figure 10 shown, includes a steel shell 15 and a battery cell 12, and further includes the above-mentioned battery cap assembly. The battery cell 12 is arranged inside the steel shell 15. The positive electrode of the battery cell 12 is connected to the electrode post 7 in the battery cap assembly. The battery cap assembly is tightly covered on the port of the steel shell 15 by interference fit to package the battery cell 12 inside the steel shell 15. That is, the side wall of the steel ring on the cap assembly is interference-fitted and clamped with the inner side wall of the steel shell 15, and an exhaust hole is formed between the plane 8 on the steel ring of the battery cap assembly and the inner wall of the steel shell. Since the battery has the above-mentioned battery cap assembly, the battery also has all the beneficial technical effects of the above-mentioned battery cap assembly, which will not be elaborated one by one here.

[0031] A label that completely wraps the steel shell and partially wraps the battery cap assembly is provided on the outer wall of the battery. The exhaust hole formed between the plane 8 on the battery cap assembly and the side wall of the steel shell 15 is wrapped by the label to prevent external liquid from flowing into the inside of the steel shell and achieve a certain waterproof function. At the same time, when there is gas to be released inside the steel shell, it can be discharged through the exhaust hole and the label wrapped at the exhaust hole bulges, so that the gas inside the steel shell 15 can be discharged smoothly and ensure the safety of battery use. The materials of existing battery labels can bulge under the action of gas, which is common knowledge in this field.

Claims

1. A processing technology for a battery cap assembly, characterized in that, The steps are as follows: 1) Punch out a plurality of circuit board bodies (2) suitable for battery cap assemblies on a circuit board sheet (1), and make each circuit board body (2) still clamped on the circuit board sheet (1) around it and not fall off; 2) Set glue-passing through holes (4) on each circuit board body (2) of the circuit board sheet (1) in step 1). Set the positive terminal (5) on one side of each circuit board body (2) by means of chip mounting technology, and set a steel ring (6), an electrode post (7) connected to the positive electrode of the battery cell and electronic components on the other side of each circuit board body (2). The electronic components and the electrode post (7) are both framed in the inner ring of the steel ring (6); 3) Put the whole circuit board sheet (1) in step 2) into a mold, and inject insulating glue into the mold cavity by means of injection molding. The insulating glue fills the inner ring of the steel ring (6) to form an insulating glue block that completely wraps and covers the electronic components. The insulating glue also flows through the glue-passing through holes (4) to the side of the circuit board body (2) with the positive terminal (5) and completely wraps and covers the part except the positive terminal (5) to form a single-voltage battery cap assembly (9), or the insulating glue also flows through the glue-passing through holes (4) to the side of the circuit board body (2) with the positive terminal (5) and forms two spaced insulating rings (10) on the surface of this side to form a dual-voltage battery cap assembly (11); wherein, the end of the electrode post (7) is not covered by the insulating glue block, and at the same time, the exhaust structure on each battery cap assembly should be avoided from being blocked; 4) Cool, demold, and take out the whole circuit board sheet (1) in step 3).

2. A battery cap assembly, comprising a circuit board body (2), a positive electrode end (5) is arranged on the upper surface of the circuit board body (2), a steel ring (6) is arranged on the lower surface of the circuit board body (2), and an electrode post (7) and electronic components connected to the positive electrode of the battery cell 12 are further arranged on the circuit board body (2) within the inner ring of the steel ring (6); characterized in that: Glue-passing through holes (4) for passing insulating glue are provided on the circuit board body (2). An insulating glue block that fills the inner ring of the steel ring (6) and completely wraps and covers the electronic components is formed by injection molding in the inner ring of the steel ring (6). Wherein, the end of the electrode post (7) is exposed, and an insulating glue layer (13) formed by insulating glue is formed by injection molding on the upper surface of the circuit board body (2) around the positive terminal (5) to form a single-voltage battery cap assembly (9), or two spaced insulating rings (10) formed by insulating glue are formed by injection molding on the upper surface of the circuit board body (2) around the positive terminal (5) to form a dual-voltage battery cap assembly (11).

3. The battery cap assembly according to claim 2, wherein: An exhaust structure is provided on each battery cap assembly.

4. The battery cap assembly according to claim 3, wherein: The exhaust structure includes a plane (8) provided on the outer side wall of the steel ring.

5. The battery cap assembly according to claim 3 or 4, characterized in that: The outer diameter of the steel ring (6) is smaller than the diameter of the circuit board body (2). After the two are assembled into one body, a stepped shape is formed between the outer edge of the steel ring (6) and the outer edge of the circuit board body (2).

6. The battery cap assembly according to claim 5, characterized in that: When the battery cap assembly is a single-voltage battery cap assembly (9), its positive terminal (5) is a horn-shaped metal cap (14). A plurality of light-transmitting windows (16) are spaced on the metal cap (14). The insulating glue layer (13) completely covers the plurality of light-transmitting windows (16) on the metal cap (14). An indicator light is provided below the metal cap (14) and on the circuit board body (2).

7. The battery cap assembly according to claim 5, characterized in that: When the battery cap assembly is a dual-voltage battery cap assembly (11), an indicator light is provided below the insulating ring (10) and on the circuit board body (2).

8. A battery, comprising a steel case (15) and an electric core (12), characterized in that: It further includes a battery cap assembly according to any one of claims 2 to 7. The battery cell (12) is disposed within the steel shell (15). The positive electrode of the battery cell (12) is connected to the electrode post (7) in the battery cap assembly. The battery cap assembly is tightly covered on the port of the steel shell (15) by interference fit to package the battery cell (12) within the steel shell (15). An exhaust hole is formed between the plane (8) on the outer sidewall of the steel ring of the battery cap assembly and the inner wall of the steel shell.

9. The battery according to claim 8, wherein: A label that completely wraps the steel shell (15) and partially wraps the battery cap assembly is provided on the outer wall of the battery, and the exhaust hole is wrapped by the label.

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