Cover plate assembly, microbattery, and capsule endoscope

Abstract

The present application provides a cover plate assembly, a microbattery, and a capsule endoscope. The cover plate assembly comprises a cover plate, a pole structure, and a sealing ring; the cover plate is configured to cover an opening and is sealingly fitted with the side wall of the opening, such that a seal is formed between the cover plate and a case; a sealing ring accommodating groove is formed on the peripheral side wall of the pole structure; and the sealing ring is provided on the peripheral side wall of the pole structure, is accommodated in the sealing ring accommodating groove, and is sealingly fitted with the sealing ring accommodating groove, thereby enhancing the sealing performance between the sealing ring and the pole structure.

Description

Cover plate assembly, micro battery and capsule endoscope

[0001] The present application claims priority to the Chinese patent application No. 2024223423739, filed on September 24, 2024, with the Chinese Patent Office, the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The utility model relates to medical instrument equipment technical field, especially relate to cover plate assembly, micro battery and capsule endoscope. BACKGROUND

[0003] Compared with the traditional endoscope, the capsule endoscope has the advantages of painless, non-invasive, no infection and no risk of injury. The battery of the capsule endoscope usually adopts a manganese dioxide battery, and the cover plate of the battery generally adopts a glass sealing structure. The glass sealing structure usually includes a bottom plate, a glass body and a pole, wherein the bottom plate has a mounting hole penetrating the center line direction thereof, the pole is sealingly connected with the mounting hole through the glass body, and the outer periphery of the bottom plate is welded and sealed with the inner wall of the battery shell, thereby realizing the packaging of the battery. TECHNICAL PROBLEM

[0004] However, the processing and precision control of the glass sealing structure are difficult, and liquid leakage may occur due to processing errors. In addition, the pole usually needs to be processed by the slurry drawing or film pressing process, and the performance of large current pulse is poor. TECHNICAL SOLUTION

[0005] In a first aspect, the present application provides a cover plate assembly for a micro battery, wherein the micro battery includes a shell, and an accommodating cavity with an opening is formed in the interior of the shell; the cover plate assembly includes: a cover plate configured to cover the opening and sealingly connect with the side wall of the opening; a pole structure penetrating the cover plate, wherein the outer peripheral side wall of the pole structure is formed with a sealing ring accommodating groove; a sealing ring arranged on the outer peripheral side wall of the pole structure, wherein the sealing ring is accommodated in the sealing ring accommodating groove and sealingly connects with the sealing ring accommodating groove; and the outer peripheral side wall of the sealing ring sealingly connects with the inner peripheral side wall of the cover plate.

[0006] In a second aspect, the present application provides a micro battery including the above-mentioned cover plate assembly, and further including a shell and a battery core structure, wherein the shell has a bottom wall and a shell side wall surrounding the periphery of the bottom wall, the shell side wall and the bottom wall together form an accommodating cavity with an opening at one end, the diameter of the shell is not more than 10 mm, the cover plate is configured to cover the opening, and the battery core structure is arranged in the accommodating cavity.

[0007] In a third aspect, the application provides a capsule endoscope, comprising the micro battery, and further comprising an endoscope shell and a working module, the micro battery and the working module are arranged in the interior of the endoscope shell, and the micro battery is electrically connected with the working module. Advantages

[0008] The application has the following advantages:

[0009] The application provides a cover plate assembly for a micro battery, the micro battery comprising a shell, an accommodating cavity with an opening is formed in the interior of the shell; the cover plate assembly comprises a cover plate, a pole structure and a sealing ring, the cover plate is configured to cover the opening and sealingly fit with the side wall of the opening, so that a seal is formed between the cover plate and the shell; a sealing ring accommodating groove is formed in the peripheral side wall of the pole structure; the sealing ring is arranged on the peripheral side wall of the pole structure, and is accommodated in the sealing ring accommodating groove and sealingly fit with the sealing ring accommodating groove, so as to enhance the sealing performance between the sealing ring and the pole structure, and fix the position of the sealing ring relative to the pole structure, facilitating assembly, and the peripheral side wall of the sealing ring sealingly fit with the inner peripheral side wall of the cover plate, so that the inner and outer sides of the sealing ring can form good seals with the pole structure and the cover plate respectively, avoiding liquid leakage, and the sealing ring replaces the traditional glass sealing structure, which can reduce the difficulty of processing and precision control.

[0010] The application provides a micro battery, comprising the cover plate assembly, and further comprising a shell and a battery core structure, the shell has a bottom wall and a shell side wall surrounding the peripheral side of the bottom wall, the shell side wall and the bottom wall together form an accommodating cavity with an opening at one end, the diameter of the shell is not more than 10 mm, so as to reduce the size of the micro battery as much as possible, the cover plate is configured to cover the opening, and the battery core structure is arranged in the accommodating cavity. In the cover plate assembly, the cover plate sealingly fit with the shell, and the inner and outer sides of the sealing ring can form good seals with the pole structure and the cover plate respectively, avoiding liquid leakage, and the sealing ring replaces the traditional glass sealing structure, which can reduce the difficulty of processing and precision control.

[0011] The application also provides a capsule endoscope, comprising the micro battery, and further comprising an endoscope shell and a working module, the micro battery and the working module are arranged in the interior of the endoscope shell, and the micro battery is electrically connected with the working module, the size of the micro battery is small, and the sealing performance of the cover plate assembly and the shell is good, which can avoid liquid leakage, and the sealing ring replaces the traditional glass sealing structure, which can reduce the difficulty of processing and precision control. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 is a structural schematic view of a micro battery in the embodiment of the application;

[0013] Fig. 2 is an exploded view of a cover plate assembly in the embodiment of the application.

[0014] In the drawings:

[0015] 100, housing; 101, bottom wall; 102, housing side wall; 103, opening; 104, accommodating cavity;

[0016] 200, cover plate; 201, mounting hole;

[0017] 300, pole assembly; 301, sealing ring accommodating groove; 310, first pressing plate; 320, pole body; 330, second pressing plate;

[0018] 400, sealing ring; 401, cover plate accommodating groove;

[0019] 500, positive electrode sheet; 510, positive electrode tab;

[0020] 600, negative electrode sheet; 610, negative electrode tab;

[0021] 700, insulation layer;

[0022] 800, insulation gasket.

[0023] Embodiments of the present application

[0024] The capsule endoscope battery generally uses a manganese dioxide battery, and the cover plate of the battery generally adopts a glass sealing structure. The glass sealing structure generally includes a bottom plate, a glass body, and a pole, wherein the bottom plate has a mounting hole penetrating the center line direction thereof, the pole is in sealing fit with the mounting hole through the glass body, and the outer periphery of the bottom plate is welded and sealed with the inner wall of the battery shell, so as to realize the packaging of the battery. However, the machining and precision control of the glass sealing structure are difficult, and liquid leakage is prone to occur due to machining errors, and the pole mostly needs to use a pulping or film pressing process, and the large current pulse performance is poor.

[0025] The present embodiment provides a micro battery to solve the problems in the related art that the glass sealing structure is difficult to control, liquid leakage is prone to occur, and the pole mostly needs to use a pulping or film pressing process, and the large current pulse performance is poor, and can be used in the technical field of medical instruments and equipment.

[0026] Referring to FIG. 1-2, the cover plate assembly is configured as a micro battery, which comprises a shell 100, an inner part of the shell 100 forms a containing cavity 104 with an opening 103; the cover plate assembly comprises a cover plate 200, a pole structure 300 and a sealing ring 400, the cover plate 200 is configured to cover the opening 103 and sealingly cooperate with the side wall of the opening 103, so that a seal is formed between the cover plate 200 and the shell 100, specifically, the cover plate 200 and the side wall of the opening 103 are sealed by welding. The pole structure 300 is arranged through the cover plate 200, and the outer peripheral side wall of the pole structure 300 forms a sealing ring containing groove 301; the sealing ring 400 is arranged on the outer peripheral side wall of the pole structure 300, and the sealing ring 400 is accommodated in the sealing ring containing groove 301 and sealingly cooperates with the sealing ring containing groove 301, so as to enhance the sealing performance between the sealing ring 400 and the pole structure 300, and fix the position of the sealing ring 400 relative to the pole structure 300, facilitate assembly, and the outer peripheral side wall of the sealing ring 400 sealingly cooperates with the inner peripheral side wall of the cover plate 200, so that the inner and outer sides of the sealing ring 400 can form good seals with the pole structure 300 and the cover plate 200 respectively, avoiding liquid leakage, and at the same time, the sealing ring 400 replaces the traditional glass sealing structure, which can reduce the difficulty of processing and precision control.

[0027] In the embodiment, the sealing ring 400 is made of plastic material, so that the sealing ring 400 can be elastically deformed and has good sealing effect. Specifically, the material of the sealing ring 400 is PP, PPS, GPPS, PFA, HDPE or PC, so as to increase the sealing effect of the sealing ring 400. Tests show that the sealing ring 400 made of the above materials can increase the service life of the battery and reduce the self-discharge rate. At the same time, the sealing ring 400 made of the above materials has certain insulation performance.

[0028] Continuing to refer to FIG. 1-2, specifically, the longitudinal section shape of the pole structure 300 is H-shaped, and the recess at the outer peripheral side wall of the pole structure 300 forms the sealing ring containing groove 301, so that the overall structure of the pole structure 300 is relatively simple, and the sealing ring 400 is interference fit with the sealing ring containing groove 301. Therefore, in the direction of the center line of the pole structure 300, the length of the sealing ring 400 should be slightly greater than the distance between the two side walls of the sealing ring containing groove 301, and since the sealing ring 400 is made of plastic material, it has certain elasticity, so it can be assembled with the side wall of the sealing ring containing groove 301 and form interference fit, so as to enhance the sealing performance between the sealing ring 400 and the side wall of the sealing ring containing groove 301.

[0029] Continuing to refer to FIGS. 1-2, the cover plate 200 has a mounting hole 201 passing through the center line direction thereof, and the outer peripheral side wall of the sealing ring 400 is formed with a cover plate accommodating groove 401, the sealing ring 400 is accommodated in the mounting hole 201, and one side wall of the cover plate accommodating groove 401 is in contact with the outer surface of the cover plate 200, and the other side wall is in contact with the inner surface of the cover plate 200, thereby enhancing the sealing performance between the sealing ring and the cover plate, and further avoiding liquid leakage.

[0030] Continuing to refer to FIGS. 1-2, the pole structure 300 includes a first pressing plate 310, a pole body 320, and a second pressing plate 330, the first pressing plate 310 and the second pressing plate 330 are respectively connected to the two ends of the pole body 320 in the axial direction and are arranged at intervals to form a sealing ring accommodating groove 301; the sealing ring 400 includes a first side wall 410, a sealing ring bottom wall 420, and a second side wall 430, the first side wall 410 and the second side wall 430 are respectively connected to the two ends of the sealing ring bottom wall 420 in the axial direction and are arranged at intervals to form a cover plate accommodating groove 401. In the radial direction of the pole structure 300, the distance between the outer wall of the first side wall 410 and the outer wall of the sealing ring bottom wall 420 is greater than the distance between the outer wall of the first pressing plate 310 and the outer wall of the pole body 320, so that the entire surface of the first pressing plate 310 close to the first side wall 410 can be attached to the first side wall 410 to improve the sealing performance. And / or, in the radial direction of the pole structure 300, the distance between the outer wall of the second side wall 430 and the outer wall of the sealing ring bottom wall 420 is greater than the distance between the outer wall of the second pressing plate 330 and the outer wall of the pole body 320, so that the entire surface of the second pressing plate 330 close to the second side wall 430 can be attached to the second side wall 430 to improve the sealing performance. The present embodiment exemplarily gives a scheme that the distance between the outer wall of the first side wall 410 and the outer wall of the sealing ring bottom wall 420 is greater than the distance between the outer wall of the first pressing plate 310 and the outer wall of the pole body 320, and the distance between the outer wall of the second side wall 430 and the outer wall of the sealing ring bottom wall 420 is greater than the distance between the outer wall of the second pressing plate 330 and the outer wall of the pole body 320.

[0031] Continuing to refer to FIGS. 1-2, the first side wall 410 is located in the accommodating cavity 104, and the second side wall 430 is located outside the accommodating cavity 104. Since the second side wall 430 is located on one side of the outer surface of the cover plate 200, it will be directly in contact with the outside, and thus the sealing performance requirement between the second side wall 430 and the second pressing plate 330 is higher. In order to meet this requirement, in the present embodiment, in the radial direction of the pole structure 300, the distance between the outer wall of the first side wall 410 and the outer wall of the sealing 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 sealing ring bottom wall 420.

[0032] Continuing to refer to FIGS. 1-2, the first pressing plate 310 is located inside the accommodating cavity 104, and the second pressing plate 330 is located outside the accommodating cavity 104, the first pressing plate 310 is integrally formed with the pole body 320, and the second pressing plate 330 is riveted and matched with the pole body 320. The sealing ring 400 can be sleeved on the pole body 320 first, and then the sealing ring 400 is pushed to abut against the first pressing plate 310, and then the second pressing plate 330 is installed on the pole body 320 by riveting, so that the assembly is completed.

[0033] The embodiment also provides a micro battery, which comprises the cover plate assembly, and further comprises a shell 100 and a battery cell structure, the shell 100 has a bottom wall 101 and a shell side wall 102 surrounding the periphery of the bottom wall 101, the shell side wall 102 and the bottom wall 101 jointly form an accommodating cavity 104 having an opening 103 at one end, the diameter of the shell 100 is not more than 10 mm, so as to reduce the size of the micro battery as much as possible, the cover plate 200 is configured to cover the opening 103, and the battery cell structure is arranged in the accommodating cavity 104. In the cover plate assembly, the cover plate 200 is sealingly matched with the shell 100, and the inner and outer sides of the sealing ring 400 can be respectively sealingly matched with the pole structure 300 and the cover plate 200, so as to avoid liquid leakage, and meanwhile, the sealing ring is used to replace the traditional glass sealing structure, so that the processing and precision control difficulty can be reduced.

[0034] Continuing to refer to FIGS. 1-2, the battery cell structure comprises a positive electrode sheet 500 and a negative electrode sheet 600, the positive electrode sheet 500 is electrically connected with the pole structure 300, and the negative electrode sheet 600 is electrically connected with the shell 100, the positive electrode end of the external structure can be connected with the pole assembly 300, and the negative electrode end can be directly connected with the shell 100, so as to supply power to the external structure, and in the embodiment, the external structure is a working module of a capsule endoscope. The positive electrode sheet 500 and the negative electrode sheet 600 are wound with each other to form a winding core, and the outermost layer is the negative electrode sheet 600, that is, the battery is a winding battery, and the outermost layer is the negative electrode sheet 600. Since the negative electrode sheet 600 is electrically connected with the shell 100, the outermost layer being the negative electrode sheet 600 can facilitate the connection between the negative electrode sheet 600 and the shell 100, and can avoid the contact between the positive electrode sheet 500 and the shell 100, so as to avoid short circuit and ensure safety. In addition, since the charge amount of the micro battery depends on the size of the positive electrode sheet 500, the negative electrode sheet 600 is arranged at the outermost layer to wrap the positive electrode sheet 500, so that the performance of the entire positive electrode sheet 500 can be released, and compared with the scheme in which the positive electrode sheet 500 is arranged at the outermost layer, the energy density of the micro battery can be improved.

[0035] Continuing to refer to FIGS. 1-2, the circumference of the outermost layer of the negative electrode sheet 600 is L, the outermost layer of the negative electrode sheet 600 covers the outermost layer of the positive electrode sheet 500 in the circumferential direction and extends by a length not less than L / 5, so as to ensure that the outermost layer of the negative electrode sheet 600 can cover the outermost layer of the positive electrode sheet 500.

[0036] Continuing to refer to FIGS. 1-2, the height of the shell 100 is no more than 10 mm, and the diameter of the shell 100 is also no more than 10 mm, so as to reduce the size of the shell 100 and enable the shell 100 to be accommodated in the narrow space of the capsule endoscope. Alternatively, the diameter of the shell 100 ranges from 6 mm to 10 mm, and specifically can be 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm or 10 mm; and the height of the shell 100 ranges from 5 mm to 10 mm, and specifically can 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.

[0037] Continuing to refer to FIGS. 1-2, the surface of the positive electrode sheet 500 is coated with an electrode active material, which aims to improve the performance of the battery, control the thickness of the electrode, ensure the safety performance of the battery, and optimize the manufacturing process of the battery. In this embodiment, the thickness of the positive electrode sheet 500 after being coated with the electrode active material is 0.2 mm~0.5 mm, and the length is 50 mm~300 mm. Tests show that the use of thick electrodes can make the 2C continuous discharge capacity of the battery greater than 80%.

[0038] Continuing to refer to FIGS. 1-2, an insulating layer 700 is arranged between the positive electrode sheet 500 and the negative electrode sheet 600 to avoid contact between the positive electrode sheet 500 and the negative electrode sheet 600. In order to ensure the insulation effect, along the center line direction of the winding core, i.e. the center line direction of the mutual winding of the positive electrode sheet 500 and the negative electrode sheet 600, the lengths of the positive electrode sheet 500 and the negative electrode sheet 600 are the same, while 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 extend relative to the positive electrode sheet 500 or the negative electrode sheet 600.

[0039] Continuing to refer to FIGS. 1-2, along the center line direction of the winding core, at least one end of the winding core is provided with an insulating gasket 800. In this embodiment, both ends of the winding core are provided with the insulating gasket 800 along the center line direction of the winding core, and the insulating gasket 800 can prevent the winding core from directly contacting other structures along the center line direction thereof.

[0040] The embodiment also provides a capsule endoscope, which comprises the above-mentioned miniature battery and further comprises an endoscope shell and a working module. The miniature battery and the working module are arranged inside the endoscope shell, and the miniature battery is electrically connected with the working module. The size of the miniature battery is small, the sealing performance of the cover plate assembly and the shell 100 is good, liquid leakage can be avoided, and the traditional glass sealing structure is replaced by the sealing ring, which can reduce the processing and precision control difficulty.

Claims

1. A cover plate assembly for a micro battery, the micro battery comprising a housing (100) having an accommodating cavity (104) with an opening (103) formed inside the housing (100); the cover plate assembly comprising: a cover plate (200) configured to cover the opening (103) and sealingly engage with a sidewall of the opening (103); a pole structure (300) penetrating the cover plate (200), an outer peripheral sidewall of the pole structure (300) being formed with a seal ring accommodating groove (301); a seal ring (400) arranged on the outer peripheral sidewall of the pole structure (300), the seal ring (400) being accommodated in the seal ring accommodating groove (301) and sealingly engaging with the seal ring accommodating groove (301); an outer peripheral sidewall of the seal ring (400) sealingly engaging with an inner peripheral sidewall of the cover plate (200).

2. The cover plate assembly of claim 1, wherein, A longitudinal cross-sectional shape of the pole structure (300) is an I-shaped, a recess at the outer peripheral sidewall of the pole structure (300) forms the seal ring accommodating groove (301), and the seal ring (400) is in interference fit with the seal ring accommodating groove (301).

3. The cover plate assembly of claim 1, wherein, The cover plate (200) has a mounting hole (201) extending through a center line direction thereof, an outer peripheral sidewall of the seal ring (400) is formed with a cover plate accommodating groove (401), the seal ring (400) is accommodated in the mounting hole (201), and one sidewall of the cover plate accommodating groove (401) is in contact with an outer surface of the cover plate (200) and the other sidewall is in contact with an inner surface of the cover plate (200).

4. The cover plate assembly of claim 3, wherein, The pole structure (300) comprises a first pressing plate (310), a pole body (320) and a second pressing plate (330), the first pressing plate (310) and the second pressing plate (330) are respectively connected to two ends of the pole body (320) in an axial direction and are arranged at intervals to form the seal ring accommodating groove (301); the seal ring (400) comprises a first sidewall (410), a seal ring bottom wall (420) and a second sidewall (430), the first sidewall (410) and the second sidewall (430) are respectively connected to two ends of the seal ring bottom wall (420) in an axial direction and are arranged at intervals to form the cover plate accommodating groove (401); In a radial direction of the pole structure (300), a distance between an outer wall of the first sidewall (410) and an outer wall of the seal ring bottom wall (420) is greater than a distance between an outer wall of the first pressing plate (310) and an outer wall of the pole body (320); and / or, In the radial direction of the pole structure (300), a distance between an outer wall of the second sidewall (430) and the outer wall of the seal ring bottom wall (420) is greater than a distance between an outer wall of the second pressing plate (330) and the outer wall of the pole body (320).

5. The cover plate assembly of claim 4, wherein, The first side wall (410) is located in the accommodating cavity (104), the second side wall (430) is located outside the accommodating cavity (104), and the distance between the outer wall of the second side wall (430) and the outer wall of the sealing 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 sealing ring bottom wall (420) in the radial direction of the pole structure (300).

6. The cover plate assembly of any one of claims 2-5, wherein, The pole structure (300) comprises a first pressing plate (310), a pole body (320), and a second pressing plate (330), the first pressing plate (310) and the second pressing plate (330) are respectively connected to the two ends of the pole body (320) in the axial direction and are arranged at intervals to form the sealing ring accommodating groove (301), the first pressing plate (310) is located in the accommodating cavity (104), the second pressing plate (330) is located outside the accommodating cavity (104), the first pressing plate (310) is integrally formed with the pole body (320), and the second pressing plate (330) is riveted and matched with the pole body (320).

7. A micro battery comprising the cover plate assembly according to any one of claims 1-6, further comprising a shell (100) and an electric core structure, the shell (100) has a bottom wall (101) and a shell side wall (102) surrounding the periphery of the bottom wall (101), the shell side wall (102) and the bottom wall (101) together form an accommodating cavity (104) having an opening (103) at one end, the diameter of the shell (100) is not more than 10 mm, the cover plate (200) is configured to cover the opening (103), and the electric core structure is arranged in the accommodating cavity (104).

8. The microbattery of claim 7, wherein, The electric core structure comprises a positive electrode sheet (500) and a negative electrode sheet (600), the positive electrode sheet (500) is electrically connected with the pole structure (300), the negative electrode sheet (600) is electrically connected with the shell (100), the positive electrode sheet (500) and the negative electrode sheet (600) are wound with each other to form a winding core, and the outermost layer is the negative electrode sheet (600).

9. The microbattery of 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 in the circumferential direction after covering the outermost layer of the positive electrode sheet (500), and the extension length is not less than L / 5.

10. A capsule endoscope comprising the micro battery according to any one of claims 7-9, further comprising an endoscope shell and a working module, the micro battery and the working module are arranged in the interior of the endoscope shell, and the micro battery is electrically connected with the working module.

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