Cover plate assembly, microbattery, and capsule endoscope
The use of a seal ring and post structure in the cover plate assembly addresses the challenges of glass-sealed structures by improving sealing, reducing leakage, and enhancing battery performance in capsule endoscopes.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2026-04-03
AI Technical Summary
Conventional glass-sealed structures for capsule endoscope batteries face high processing difficulty, susceptibility to liquid leakage due to processing errors, and require slurry drawing or film pressing technology, resulting in poor high-current pulse performance.
A cover plate assembly using a seal ring and post structure with a seal ring housing groove, where the seal ring is made of elastic materials like PP, PPS, GPPS, PFA, or HDPE, forming a seal between the cover plate and housing to enhance sealing performance and simplify assembly.
The seal ring structure reduces processing and precision control difficulties, prevents leakage, and improves battery performance by enhancing sealing and reducing self-discharge, while allowing for a smaller battery size and improved energy density.
Smart Images
Figure 2026058331000001_ABST
Abstract
Description
Technical Field
[0001] Cross - reference to Related Applications This application claims the priority of a Chinese patent application with application number 2024223423739 filed with the Chinese Patent Office on September 24, 2024, and all the contents of the above application are incorporated herein by reference.
[0002] Technical Field The present invention relates to the technical field of medical devices, particularly to a cover plate assembly, a micro - battery, and a capsule endoscope.
Background Art
[0003] Compared with conventional endoscopes, capsule endoscopes are painless, non - invasive, and have no risk of infection or injury. However, capsule endoscope batteries usually adopt manganese dioxide batteries, and the battery cover plate generally adopts a glass - sealing structure. The glass - sealing structure usually includes a bottom plate, a glass body, and a post. Here, the bottom plate has a mounting hole penetrating in its center - line direction, and the post is sealingly fitted into the mounting hole by the glass body, and the outer peripheral edge of the bottom plate and the inner wall of the battery housing are welded and sealed to realize the battery packaging.
Summary of the Invention
Problems to be Solved by the Invention
[0004] However, the glass - sealing structure has high processing and precision - control difficulty, is prone to liquid leakage due to processing errors, and most posts need to adopt slurry drawing or film pressing technology, resulting in poor high - current pulse performance.
Means for Solving the Problems
[0005] According to a first aspect, the present invention provides a cover plate assembly for a microbattery, the microbattery including a housing, the housing having an opening formed inside the housing, the cover plate assembly including a cover plate configured to cover the opening and to seal-fit to the side wall of the opening, a post structure drilled in the cover plate and having a seal ring housing groove formed on its outer peripheral side wall, and a seal ring provided on the outer peripheral side wall of the post structure, housed in the seal ring housing groove and sealing-fitting to the seal ring housing groove, the outer peripheral side wall of which seal-fits to the inner peripheral side wall of the cover plate.
[0006] According to a second aspect, the present invention provides a microbattery, the microbattery comprising the cover plate assembly, and further comprising a housing and a cell structure, the housing having a bottom wall and a housing side wall provided circumferentially on the periphery of the bottom wall, the housing side wall and the bottom wall forming a housing chamber having an opening at one end, the diameter of the housing being 10 mm or less, the cover plate being configured to cover the opening, and the cell structure being provided within the housing chamber.
[0007] According to a third aspect, the present invention provides a capsule endoscope, the capsule endoscope further comprising a microbattery, an endoscope housing, and a working module, wherein both the microbattery and the working module are located inside the endoscope housing, and the microbattery is electrically connected to the working module. [Effects of the Invention]
[0008] The beneficial effects of this application are as follows: This invention provides a cover plate assembly for a microbattery, the microbattery including a housing in which a housing chamber with an opening is formed, the cover plate assembly including a cover plate, a post structure and a seal ring, the cover plate being configured to cover the opening and to seal-fit to the side wall of the opening thereby forming a seal between the cover plate and the housing, a seal ring housing groove being formed in the outer peripheral side wall of the post structure, the seal ring being provided in the outer peripheral side wall of the post structure and being housed in the seal ring housing groove and to seal-fit to the seal ring housing groove thereby reinforcing the sealing performance between the seal ring and the post structure, and fixing the seal ring to the position of the post structure, making assembly easier, the outer peripheral side wall of the seal ring sealing-fit to the inner peripheral side wall of the cover plate, and both the inner and outer sides of the seal ring forming a good seal with the post structure and the cover plate, respectively, thereby preventing leakage, and at the same time, by using a seal ring instead of a conventional glass sealing structure, the difficulty of processing and precision control can be reduced.
[0009] This invention provides a microbattery, which includes the above-mentioned lid plate assembly, and further includes a housing and a cell structure, wherein the housing has a bottom wall and a housing side wall provided around the periphery of the bottom wall, the housing side wall and the bottom wall form a housing chamber having an opening at one end, the diameter of the housing is 10 mm or less, thereby minimizing the size of the microbattery, the lid plate is configured to cover the opening, and the cell structure is provided inside the housing chamber. In the above-mentioned lid plate assembly, the lid plate and the housing are sealed together, and both the inner and outer sides of the seal ring form a good seal with the post structure and the lid plate, respectively, thereby preventing leakage, and at the same time, by using a seal ring instead of a conventional glass sealing structure, the difficulty of processing and precision control can be reduced.
[0010] The present invention further provides a capsule endoscope comprising the above-mentioned microbattery, and further comprising an endoscope housing and a working module, wherein both the microbattery and the working module are provided inside the endoscope housing, and the microbattery is electrically connected to the working module, the size of the microbattery is relatively small, and the sealing performance of the lid plate assembly and housing is relatively good, preventing leakage, and at the same time, by using a sealing ring instead of a conventional glass sealing structure, the difficulty of processing and precision control can be reduced. [Brief explanation of the drawing]
[0011] [Figure 1] This is a schematic diagram of the structure of a microbattery in an embodiment of the present invention. [Figure 2] This is an exploded view of the cover plate assembly in an embodiment of the present invention. [Modes for carrying out the invention]
[0012] Capsule endoscope batteries typically employ manganese dioxide batteries, and the battery cover generally uses a glass-sealed structure. The glass-sealed structure usually includes a base plate, a glass body, and a post. The base plate has a mounting hole that penetrates its centerline, and the post is sealed into the mounting hole by the glass body. The battery package is realized by welding the outer edge of the base plate to the inner wall of the battery housing. However, glass-sealed structures are difficult to process and control precisely, and leakage is likely to occur due to processing errors. Moreover, many posts require the use of slurry drawing or film pressing technology, resulting in poor high-current pulse performance.
[0013] This embodiment provides a micro battery for use in the field of medical devices and equipment, in order to solve the problems in related technologies, such as the difficulty of processing and precision control of glass sealing structures, the susceptibility to leakage due to processing errors, and the need for many posts to employ slurry drawing or film pressing technology, resulting in poor high-current pulse performance.
[0014] Referring to Figures 1 and 2, the cover plate assembly is configured as a microbattery, which includes a housing 100, and a housing chamber 104 with an opening 103 is formed inside the housing 100. The cover plate assembly includes a cover plate 200, a post structure 300, and a seal ring 400, and the cover plate 200 is configured to cover the opening 103 and to seal-fit to the side wall of the opening 103, thereby forming a seal between the cover plate 200 and the housing 100, specifically the cover plate 200 and the side wall of the opening 103 are sealed by welding. A post structure 300 is drilled into the cover plate 200, a seal ring housing groove 301 is formed in the outer peripheral side wall of the post structure 300, and a seal ring 400 is provided on the outer peripheral side wall of the post structure 300. The seal ring 400 is housed in the seal ring housing groove 301 and seal-fitted to the seal ring housing groove 301, thereby reinforcing the sealing performance between the seal ring 400 and the post structure 300, fixing the seal ring 400 in position relative to the post structure 300, making assembly easier, and the outer peripheral side wall of the seal ring 400 seal-fits to the inner peripheral side wall of the cover plate 200, so that both the inner and outer sides of the seal ring 400 form a good seal with the post structure 300 and the cover plate 200, respectively, preventing liquid leakage. At the same time, by using the seal ring 400 instead of the conventional glass sealing structure, the difficulty of processing and precision control can be reduced.
[0015] In this embodiment, the seal ring 400 is made of a plastic material that can be elastically deformed and has a relatively good sealing effect. Specifically, the material of the seal ring 400 is PP, PPS, GPPS, PFA, HDPE, or PC, which increases the sealing effect of the seal ring 400. Tests have shown that using a seal ring 400 made of the above material can increase the battery's service life and reduce its self-discharge rate. At the same time, using the above material can provide the seal ring 400 with a certain level of insulation performance.
[0016] Referring further to Figures 1 and 2, specifically, the vertical cross-sectional shape of the post structure 300 is I-shaped, and a seal ring housing groove 301 is formed in the recess of the outer peripheral side wall of the post structure 300, making the overall structure of the post structure 300 relatively simple. Since the seal ring 400 is interlocked into the seal ring housing groove 301, the length of the seal ring 400 along the centerline direction of the post structure 300 should be slightly greater than the distance between the two side walls of the seal ring housing groove 301. Furthermore, since the seal ring 400 is made of plastic material and has a certain elasticity, it can assemble with the side walls of the seal ring housing groove 301 to form an interlocking fit, thereby enhancing the sealing performance between the seal ring 400 and the side walls of the seal ring housing groove 301.
[0017] Referring to Figures 1 and 2, the cover plate 200 has a mounting hole 201 that penetrates in the direction of its centerline, and a cover plate accommodating groove 401 is formed in the outer peripheral side wall of the seal ring 400. The seal ring 400 is accommodated in the mounting hole 201, and one side wall of the cover plate accommodating groove 401 contacts the outer surface of the cover plate 200, while the other side wall contacts the inner surface of the cover plate 200. This reinforces the sealing performance between the seal ring and the cover plate and prevents liquid leakage.
[0018] Referring to Figures 1 and 2, the post structure 300 includes a first platen 310, a post body 320, and a second platen 330, the first platen 310 and the second platen 330 being connected to and spaced apart at both axial ends of the post body 320 so as to form a seal ring housing groove 301, and the seal ring 400 includes a first side wall 410, a seal ring bottom wall 420, and a second side wall 430, the first side wall 410 and the second side wall 430 being connected to and spaced apart at both axial ends of the seal ring bottom wall 420 so as to form a cover plate housing groove 401. Along the radial direction of the post structure 300, the distance between the outer wall of the first side wall 410 and the outer wall of the seal ring bottom wall 420 is greater than the distance between the outer wall of the first platen 310 and the outer wall of the post body 320, allowing the entire surface of the first platen 310 closest to the first side wall 410 to adhere closely to the first side wall 410, thereby improving the sealing performance. And / or, along the radial direction of the post structure 300, the distance between the outer wall of the second side wall 430 and the outer wall of the seal ring bottom wall 420 is greater than the distance between the outer wall of the second platen 330 and the outer wall of the post body 320, allowing the entire surface of the second platen 330 closest to the second side wall 430 to adhere closely to the second side wall 430, thereby improving the sealing performance. In this embodiment, an example is provided in which the distance between the outer wall of the first side wall 410 and the outer wall of the seal ring bottom wall 420 is greater than the distance between the outer wall of the first platen 310 and the outer wall of the post body 320, and the distance between the outer wall of the second side wall 430 and the outer wall of the seal ring bottom wall 420 is greater than the distance between the outer wall of the second platen 330 and the outer wall of the post body 320.
[0019] Referring to Figures 1 and 2, the first side wall 410 is located inside the containment chamber 104, and the second side wall 430 is located outside the containment chamber 104. Since the second side wall 430 is located on one side of the outer surface of the cover plate 200 and is in direct contact with the outside, a high level of sealing performance is required between the second side wall 430 and the second platen 330. To meet this requirement, in this embodiment, along the radial direction of the post structure 300, the distance between the outer wall of the first side wall 410 and the outer wall of the seal ring bottom wall 420 is greater than the distance between the outer wall of the second side wall 430 and the outer wall of the seal ring bottom wall 420.
[0020] Referring to Figures 1 and 2, the first platen 310 is located inside the housing chamber 104, and the second platen 330 is located outside the housing chamber 104. The first platen 310 is integrally molded with the post body 320, and the second platen 330 is crimped and fitted with the post body 320. First, the seal ring 400 is fitted onto the post body 320, and the seal ring 400 is pressed against the first platen 310. Then, the second platen 330 is attached to the post body 320 by crimping, thereby completing the assembly.
[0021] This embodiment further provides a microbattery, which includes the above-mentioned lid plate assembly, and further includes a housing 100 and a cell structure, wherein the housing 100 has a bottom wall 101 and a housing side wall 102 provided around the periphery of the bottom wall 101, and the housing side wall 102 and the bottom wall 101 form a housing chamber 104 having an opening 103 at one end, the diameter of the housing 100 is 10 mm or less, thereby making the size of the microbattery as small as possible, the lid plate 200 is configured to cover the opening 103, and the cell structure is provided inside the housing chamber 104. In the above-mentioned lid plate assembly, the lid plate 200 and the housing 100 are sealed together, and both the inner and outer sides of the seal ring 400 form a good seal with the post structure 300 and the lid plate 200, respectively, so that leakage can be avoided, and at the same time, by using a seal ring instead of a conventional glass sealing structure, the difficulty of processing and precision control can be reduced.
[0022] Continuing to refer to FIGS. 1-2, the cell structure includes a positive electrode sheet 500 electrically connected to the post structure 300 and a negative electrode sheet 600 electrically connected to the housing 100. The positive terminal of the external structure can be connected to the post assembly 300, and the negative terminal can be directly connected to the housing 100. Thereby, the battery can supply power to the external structure. In this embodiment, the external structure is the working module of the capsule endoscope. The positive electrode sheet 500 and the negative electrode sheet 600 are wound to form a core, and the outermost layer is the negative electrode sheet 600. That is, the battery is a wound battery, and the outermost layer is the negative electrode sheet 600. Since the negative electrode sheet 600 is electrically connected to the housing 100, the outermost layer is the negative electrode sheet 600, which can facilitate the connection between the negative electrode sheet 600 and the housing 100, while avoiding the contact between the positive electrode sheet 500 and the housing 100, avoiding short circuits, and ensuring safety. In addition, since the charge amount of the micro battery depends on the size of the positive electrode sheet 500, by providing the negative electrode sheet 600 on the outermost layer to wrap the positive electrode sheet 500, the performance of the entire positive electrode sheet 500 can be released, and the energy density of the micro battery can be improved compared with the case where the positive electrode sheet 500 is provided on the outermost layer.
[0023] Continuing to refer to FIGS. 1-2, the perimeter of the outermost layer of the negative electrode sheet 600 is L, and the outermost layer of the negative electrode sheet 600 extends along the circumferential direction after covering the outermost layer of the positive electrode sheet 500, and the length of the extension is L / 5 or more, ensuring that the outermost layer of the negative electrode sheet 600 can cover the outermost layer of the positive electrode sheet 500.
[0024] Continuing to refer to FIGS. 1 - 2, the height of the housing 100 is 10 mm or less, and the diameter of the housing 100 is also 10 mm or less. Thus, the size of the housing 100 can be reduced so that it can be accommodated within the narrow space of the capsule endoscope. Optionally, the diameter range of the housing 100 is 6 mm - 10 mm, specifically, it may be 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm or 10 mm. The height range of the housing 100 is 5 mm - 10 mm, specifically, it may be 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm or 10 mm.
[0025] Continuing to refer to FIGS. 1 - 2, an electrode active material is coated on the surface of the positive electrode sheet 500 for the purpose of improving battery performance, controlling the thickness of the electrode, ensuring the safety performance of the battery, and optimizing the battery manufacturing process. In this embodiment, the thickness of the positive electrode sheet 500 after coating with the electrode active material is 0.2 mm - 0.5 mm, and the length is 50 mm - 300 mm. Tests have shown that by using a thick electrode, the 2C continuous discharge capacity of the battery can exceed 80%.
[0026] Continuing to refer to FIGS. 1 - 2, an insulating layer 700 is provided between the positive electrode sheet 500 and the negative electrode sheet 600 so that the positive electrode sheet 500 and the negative electrode sheet 600 do not contact each other. To ensure the insulation effect, along the center line direction of the winding core, that is, the center line direction in which the positive electrode sheet 500 and the negative electrode sheet 600 are wound, the lengths of the positive electrode sheet 500 and the negative electrode sheet 600 are the same, the length of the insulating layer 700 is greater than the lengths of the positive electrode sheet 500 and the negative electrode sheet 600, and both ends of the insulating layer 700 protrude with respect to either the positive electrode sheet 500 or the negative electrode sheet 600.
[0027] Referring to Figures 1 and 2, an insulating pad 800 is provided at at least one end of the winding core along the direction of the core's centerline. In this embodiment, insulating pads 800 are provided at both ends of the winding core along the direction of the core's centerline, and the insulating pads 800 prevent the winding core from directly contacting other structures along its centerline.
[0028] This embodiment further provides a capsule endoscope that includes the above-mentioned microbattery, and further includes an endoscope housing and a work module, wherein both the microbattery and the work module are provided inside the endoscope housing, and the microbattery is electrically connected to the work module, the size of the microbattery is relatively small, the sealing performance of the lid plate assembly and housing 100 is relatively good and leakage can be avoided, and the difficulty of processing and precision control can be reduced by using a sealing ring instead of a conventional glass sealing structure.
[0029] In the figure, 100, housing, 101, bottom wall, 102, housing side wall, 103, opening, 104, containment chamber, 200, cover plate, 201, mounting hole, 300, post assembly, 301, seal ring housing groove, 310, first platen, 320, post body, 330, second platen, 400, sealing ring, 401, cover plate housing groove, 500, positive electrode sheet, 510, positive electrode tab, 600, negative electrode sheet, 610, negative electrode tab, 700, insulating layer, 800, insulating pad.
Claims
1. A cover plate assembly for a microbattery, wherein the microbattery includes a housing (100), and a housing chamber (104) having an opening (103) is formed inside the housing (100), and the cover plate assembly is A cover plate (200) is configured to cover the opening (103) and to be sealed and fitted to the side wall of the opening (103), A post structure (300) is drilled in the cover plate (200) and has a seal ring housing groove (301) formed in its outer peripheral side wall, A cover plate assembly comprising: a seal ring (400) provided on the outer peripheral side wall of the post structure (300), housed in the seal ring housing groove (301) and sealed-fitting into the seal ring housing groove (301), with the outer peripheral side wall of which sealed-fitting into the inner peripheral side wall of the cover plate (200).
2. The cover plate assembly according to claim 1, wherein the vertical cross-sectional shape of the post structure (300) is I-shaped, the seal ring housing groove (301) is formed in a recess of the outer peripheral side wall of the post structure (300), and the seal ring (400) is fitted into the seal ring housing groove (301).
3. The cover plate assembly according to claim 1, wherein the cover plate (200) has a mounting hole (201) that penetrates in the direction of its centerline, a cover plate housing groove (401) is formed in the outer peripheral side wall of the seal ring (400), the seal ring (400) is housed in the mounting hole (201), and one side wall of the cover plate housing groove (401) contacts the outer surface of the cover plate (200) and the other side wall contacts the inner surface of the cover plate (200).
4. The post structure (300) includes a first platen (310), a post body (320), and a second platen (330), wherein the first platen (310) and the second platen (330) are connected to and spaced apart at both axial ends of the post body (320) so as to form the seal ring housing groove (301), and the seal ring (400) includes a first side wall (410), a seal ring bottom wall (420), and a second side wall (430), wherein the first side wall (410) and the second side wall (430) are connected to and spaced apart at both axial ends of the seal ring bottom wall (420) so as to form the cover plate housing groove (401). Along the radial direction of the post structure (300), the distance between the outer wall of the first side wall (410) and the outer wall of the seal ring bottom wall (420) is greater than the distance between the outer wall of the first platen (310) and the outer wall of the post body (320), and / or The cover plate assembly according to claim 3, wherein, along the radial direction of the post structure (300), the distance between the outer wall of the second side wall (430) and the outer wall of the seal ring bottom wall (420) is greater than the distance between the outer wall of the second platen (330) and the outer wall of the post body (320).
5. The lid assembly according to claim 4, wherein the first side wall (410) is located inside the housing chamber (104), and the second side wall (430) is located outside the housing chamber (104), and along the radial direction of the post structure (300), the distance between the outer wall of the second side wall (430) and the outer wall of the seal ring bottom wall (420) is greater than the distance between the outer wall of the first side wall (410) and the outer wall of the seal ring bottom wall (420).
6. The post structure (300) comprises a first platen (310), a post body (320), and a second platen (330), wherein the first platen (310) and the second platen (330) are connected to and spaced apart at both axial ends of the post body (320) so as to form the seal ring housing groove (301), the first platen (310) is located inside the housing chamber (104), the second platen (330) is located outside the housing chamber (104), the first platen (310) is integrally molded with the post body (320), and the second platen (330) is crimped and fitted with the post body (320), as described in any one of claims 2 to 5.
7. A microbattery comprising a cover plate assembly according to any one of claims 1 to 6, further comprising a housing (100) and a cell structure, wherein the housing (100) has a bottom wall (101) and a housing side wall (102) provided circumferentially on the periphery of the bottom wall (101), the housing side wall (102) and the bottom wall (101) form a housing chamber (104) having an opening (103) at one end, the diameter of the housing (100) is 10 mm or less, the cover plate (200) is configured to cover the opening (103), and the cell structure is provided within the housing chamber (104).
8. The micro battery according to claim 7, wherein the cell structure includes a positive electrode sheet (500) electrically connected to the post structure (300) and a negative electrode sheet (600) electrically connected to the housing (100), the positive electrode sheet (500) and the negative electrode sheet (600) are wound together to form a core, and the outermost layer is the negative electrode sheet (600).
9. The micro battery according to claim 8, wherein the circumference of the outermost layer of the negative electrode sheet (600) is L, and the outermost layer of the negative electrode sheet (600) extends circumferentially after covering the outermost layer of the positive electrode sheet (500), and the length of the extension is L / 5 or more.
10. A capsule endoscope comprising a microbattery according to any one of claims 7 to 9, further comprising an endoscope housing and a working module, wherein both the microbattery and the working module are provided inside the endoscope housing, and the microbattery is electrically connected to the working module.