CN113054294A - Battery for active implanted medical instrument - Google Patents
Battery for active implanted medical instrument Download PDFInfo
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- CN113054294A CN113054294A CN202110230942.9A CN202110230942A CN113054294A CN 113054294 A CN113054294 A CN 113054294A CN 202110230942 A CN202110230942 A CN 202110230942A CN 113054294 A CN113054294 A CN 113054294A
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- end cap
- housing
- main body
- battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
A battery for an active implant medical device is provided, which includes a case, a cell, a connector, and a filler. The housing is made of a metal material and has a receiving space formed therein. The connector is fixed to the housing in a manner sealed with the housing. The connector includes a wire extending through the housing in an insulated manner from the housing for providing electrical energy to the active implantable medical device. The battery cell is accommodated in the accommodating space, a positive electrode lug of the battery cell is spaced from the shell and is electrically connected with the lead, and a negative electrode lug is electrically connected with the shell. The filler is made of an insulating material and is received in the receiving space, and the filler and the case position the battery cell at a predetermined position of the receiving space. The filler also serves to space the portion of the conductor located within the receiving space and the positive electrode tab from the case to insulate each other. Thus, the battery for an active implant medical instrument of the present invention realizes a stable electrical connection structure with a simple structure and ensures stable performance and a long service life of the battery.
Description
Technical Field
The invention relates to the field of active implanted medical instruments, in particular to a battery for an active implanted medical instrument.
Background
According to the relevant regulations, any instrument, wholly or partially, enters the body or natural orifice by means of surgery; these instruments are considered to be implanted instruments which remain in the body for a long period of time or for at least 30 days or more after the surgical procedure. An active implantable medical device refers to an implantable medical device driven by an independent energy supply means, for example, supplying electric energy or the like. The existing active implanted medical instruments are various in types, and take a pulse generator as an example, the pulse generator can output stimulation signals to the outside after being implanted into a human body, so that the stimulation regulation and control function of the human body is realized. The energy of the pulse generator for outputting the stimulation signal to the outside is derived from a battery arranged in the pulse generator. Such a battery may be a primary battery or a secondary battery. However, both primary and secondary batteries are different from batteries for other industrial products in internal and external structures, materials, manufacturing methods, and the like.
However, the existing battery for active implantation medical devices has a complicated structure, and cannot ensure the stability and the service life of the battery, and there is a great need in the art for a battery having a relatively simple structure and both stable performance and long service life.
Disclosure of Invention
The present invention has been made in view of the above-mentioned drawbacks of the prior art. The invention aims to provide a novel battery for an active implantation medical apparatus, which can simultaneously achieve two aspects of stable performance and long service life by a relatively simple structure.
In order to achieve the above object, the present invention adopts the following technical solutions.
The present invention provides a battery for an active implant medical device, comprising:
a housing made of a metal material and having a receiving space formed therein;
a connector fixed to the case in a manner sealed from the case such that a housing space of the case is sealed from an outside of the battery, the connector including a lead wire penetrating the case in an insulated manner from the case for transmitting electric energy to the active implantable medical device;
the battery cell is accommodated in the accommodating space, a positive electrode lug and a negative electrode lug are formed on the battery cell, the positive electrode lug is spaced from the shell and is electrically connected with the lead, and the negative electrode lug is electrically connected with the shell; and
a filler made of an insulating material and received in the receiving space, the filler and the case positioning the battery cell at a predetermined position of the receiving space, the filler also serving to space a portion of the lead wire located in the receiving space and the positive electrode tab from the case to insulate from each other.
In at least one embodiment, the battery further comprises a connecting piece made of a conductive material, the connecting piece being connected with the lead and the positive electrode tab such that the lead and the positive electrode tab are electrically connected via the connecting piece.
In at least one embodiment, the housing comprises:
a housing main body formed in a hollow structure penetrating along a longitudinal direction, the housing main body including a first opening opened to one side of the longitudinal direction and a second opening opened to the other side of the longitudinal direction;
a first end cap fixed to the case main body in such a manner as to close the first opening; and
a second end cap fixed to the case main body in such a manner as to close the second opening,
the housing main body, the first end cap, and the second end cap enclose the receiving space.
In at least one embodiment, the first end cap is integrally formed with the housing body, the second end cap is formed separately from the housing body, and the second end cap is secured to the housing body in a sealed manner with the housing body; or
The first end cap and the second end cap are formed separately from the case main body, and the first end cap and the second end cap are fixed to the case main body in a manner of being sealed with the case main body.
In at least one embodiment, the second end cap is formed with a mounting hole penetrating the second end cap, the connector is mounted to the mounting hole and fixed to the second end cap in a manner of sealing with the housing main body,
the battery cell is spaced apart from the second end cap, the filler is located between the battery cell and the second end cap, and the filler abuts against the second end cap and the battery cell.
In at least one embodiment, one of the housing main body and the first end cap is formed with a stepped structure to which the other of the housing main body and the first end cap is lapped, the housing main body and the first end cap being fixed together by welding; and/or
One of the case main body and the second cover is formed with a stepped structure to which the other of the case main body and the second cover is lapped, and the case main body and the second cover are fixed together by welding.
In at least one embodiment, the first and second end caps each at least partially overlap a sidewall of the housing body.
In at least one embodiment, the welding is laser welding.
In at least one embodiment, the first end cap, the second end cap, and the housing body are made of the same metal material, the first end cap having a thickness greater than a thickness of the housing body, the second end cap having a thickness greater than the thickness of the housing body.
In at least one embodiment, the connector further includes a flange inserted into the housing and fixed to the housing in a sealed manner with the housing, the wire passes through the flange, and an insulator between the wire and the flange.
In at least one embodiment, the flange includes a large diameter portion and a small diameter portion formed as one body, an outer diameter of the large diameter portion being greater than an outer diameter of the small diameter portion such that the flange is formed with a stepped structure,
the small-diameter portion of the flange is inserted into the mounting hole of the second end cover of the housing, so that the stepped structure abuts against the second end cover.
In at least one embodiment, the flange and the case are made of the same metal material, the insulator is made of a glass material, the wire is made of a metal material, and the flange, the insulator, and the wire are integrally formed by sintering.
In at least one embodiment, the filler includes an abutting portion abutting against the housing and the battery cell, so as to limit the battery cell.
In at least one embodiment, the filling member further includes two insulation sheets opposite to each other, the two insulation sheets being located at both sides of the positive electrode tab and the connection sheet such that the positive electrode tab and the connection sheet are separated from the case by the insulation sheets.
In at least one embodiment, the filling member further includes a bottomed cylindrical portion, the connector being mounted in the cylindrical portion, the conductor passing through a bottom portion of the cylindrical portion.
By adopting the technical scheme, the invention provides a battery for active implanted medical instruments, which comprises a shell, a battery core, a connector and a filling piece which are assembled together. The shell is made of metal materials, and a containing space is formed inside the shell. The connector is fixed to the housing in a manner sealed from the housing such that the housing space of the housing is sealed from the outside of the connector. The connector includes a wire extending through the housing in an insulated manner from the housing for providing electrical energy to the active implantable medical device. The battery cell is accommodated in the accommodating space, the battery cell is provided with a positive electrode lug and a negative electrode lug, the positive electrode lug is spaced from the shell and is electrically connected with the lead, and the negative electrode lug is electrically connected with the shell. The filling piece is made of an insulating material and is contained in the containing space, and the filling piece abuts against the shell and the battery cell, so that the battery cell is positioned at a preset position of the containing space by the filling piece and the shell. The filler also serves to space the portion of the conductor located within the receiving space and the positive electrode tab from the case to insulate each other.
Therefore, the shell of the battery for the active implanted medical instrument is made of the hard metal material, so that the firmness degree of the shell is ensured, and the stability of the internal structure of the battery is effectively ensured; the positive electrode tab of the battery cell is electrically connected with the lead, and the negative electrode tab of the battery cell is electrically connected with the shell, so that a stable electrical connection structure is realized by a simple structure; in addition, the filling piece limits the battery cell on one hand, and provides necessary insulation for the electrical structure on the other hand, so that the service life of the battery is guaranteed while the battery has stable performance.
Drawings
Fig. 1 is a perspective view illustrating a battery for an active implant medical device according to an embodiment of the present invention.
Fig. 2 is another perspective view illustrating the battery for an active implant medical device of fig. 1.
Fig. 3 is a further perspective view illustrating the battery for an active implantable medical device of fig. 1.
Fig. 4 is an exploded schematic view illustrating the battery for the active implantable medical device of fig. 1.
Fig. 5 is a schematic sectional view showing the battery for the active implantable medical device in fig. 1.
Fig. 6 is a front view schematically showing a housing of the battery for an active implantable medical device in fig. 1.
Fig. 7 is a schematic sectional view showing the housing in fig. 6.
Fig. 8 is a partially enlarged schematic view showing an area surrounded by a two-dot chain line of the case in fig. 7, in which a single arrow indicates a laser irradiation direction during laser welding.
Fig. 9 is a perspective view illustrating a connector of a battery for the active implant medical device of fig. 1.
Fig. 10 is a schematic cross-sectional view showing the connector in fig. 9.
Fig. 11 is a partially enlarged schematic view showing a housing of a modification of the battery for an active implantable medical device in fig. 1, in which a single arrow indicates a laser irradiation direction during laser welding.
Fig. 12 is a schematic sectional view showing a housing of another modification of the battery for an active implantable medical device in fig. 1.
Fig. 13 is an enlarged schematic view showing an area surrounded by a two-dot chain line of the case in fig. 12, in which a single arrow indicates a laser irradiation direction during laser welding.
Description of the reference numerals
1 casing 11 casing body 12 first end cover 13 second end cover 13h mounting hole
2 connector 21 flange 21h through hole 211 small diameter part 212 large diameter part 22 insulator 23 wire
3 battery cell 31 anode tab 32 cathode tab
4 filler 41 abutting part 42 insulating sheet 43 cylindrical part
5 connecting sheet
L longitudinal direction W width direction H height direction.
Detailed Description
Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the detailed description is intended only to teach one skilled in the art how to practice the invention, and is not intended to be exhaustive or to limit the scope of the invention.
The implantable medical device according to the present invention may be a cardiac pacemaker, defibrillator, deep brain electrical stimulator, spinal cord stimulator, vagus nerve stimulator, gastrointestinal stimulator, or other similar implantable medical device.
The present invention provides a battery for an active implantable medical device as follows. The battery includes: a housing made of a metal material and having a receiving space formed inside thereof; a connector fixed to the case in a manner sealed from the case such that a housing space of the case is sealed from an outside of the battery, the connector including a lead wire penetrating the case in an insulated manner from the case for transmitting electric energy to the active implant medical device; the battery cell is accommodated in the accommodating space, a positive electrode lug and a negative electrode lug are formed on the battery cell, the positive electrode lug is spaced from the shell and is electrically connected with the lead, and the negative electrode lug is electrically connected with the shell; and a filler made of an insulating material and received in the receiving space, the filler and the case positioning the battery cell at a predetermined position of the receiving space, the filler also serving to space a portion of the wire located in the receiving space and the positive electrode tab from the case to be insulated from each other. Therefore, the shell of the battery for the active implanted medical instrument is made of the hard metal material, so that the firmness degree of the shell is ensured, and the stability of the internal structure of the battery is effectively ensured; the positive electrode tab of the battery cell is electrically connected with the lead, and the negative electrode tab of the battery cell is electrically connected with the shell, so that a stable electrical connection structure is realized by a simple structure; in addition, the filling piece limits the battery cell on one hand, and provides necessary insulation for the electrical structure on the other hand, so that the service life of the battery is guaranteed while the battery has stable performance.
Preferably, the battery further comprises a connecting piece made of conductive material, wherein the connecting piece is connected with the lead and the positive pole lug, so that the lead is electrically connected with the positive pole lug through the connecting piece. Therefore, the lead of the connector is not required to be exactly aligned with the positive pole lug, and the connecting sheet can be used for compensating the offset between the lead and the positive pole lug so as to realize the electric connection between the lead and the positive pole lug.
Preferably, the housing comprises: a housing main body having a hollow structure penetrating along a longitudinal direction, the housing main body including a first opening opened to one side of the longitudinal direction and a second opening opened to the other side of the longitudinal direction; a first end cap fixed to the housing main body so as to close the first opening; and a second end cover fixed to the housing body in a manner of closing the second opening, the housing body, the first end cover, and the second end cover enclosing a housing space. Further, the first end cap is integrally formed with the case main body, the second end cap is formed separately from the case main body, and the second end cap is fixed to the case main body in a sealed manner with the case main body; or the first and second end caps may be formed separately from the housing main body, and the first and second end caps may be fixed to the housing main body in a manner to be sealed with the housing main body. In this way, a housing having a robust construction can be realized in a simple and flexible construction.
Preferably, the second end cap is formed with a mounting hole penetrating through the second end cap, the connector is mounted in the mounting hole and fixed to the second end cap in a manner of sealing with the housing main body, the battery cell is spaced apart from the second end cap, the filling member is located between the battery cell and the second end cap, and the filling member abuts against the second end cap and the battery cell. Thus, when the housing is formed with a simple and firm structure, the components inside the housing can be arranged in a reasonable manner by the filler.
Preferably, one of the case main body and the first cap is formed with a stepped structure, and the other of the case main body and the first cap is lapped over the stepped structure, and the case main body and the first cap are fixed together by welding; and/or one of the case body and the second end cap is formed with a stepped structure to which the other of the case body and the second end cap is lapped, and the case body and the second end cap are fixed together by welding. Further, the first end cap and the second end cap each at least partially overlap a sidewall of the housing body. Further, the welding is laser welding. In this way, the end cap and the housing body can be firmly fixed together using a conventional welding scheme, thereby achieving good sealing performance and stability of the housing.
Preferably, the first end cap, the second end cap and the housing body are made of the same metal material, the thickness of the first end cap is greater than that of the housing body, and the thickness of the second end cap is greater than that of the housing body. Thus, the sealing performance and the structural strength of the shell are further ensured.
Preferably, the connector further includes a flange inserted into the housing and fixed to the housing in a manner sealed with the housing, the wire passing through the flange, and an insulator located between the wire and the flange. In at least one embodiment, the flange includes a large diameter portion and a small diameter portion formed as one body, an outer diameter of the large diameter portion is larger than an outer diameter of the small diameter portion such that the flange is formed with a stepped structure, and the small diameter portion of the flange is inserted into a mounting hole of a second end cap of the housing such that the stepped structure abuts against the second end cap. In this way, in the case where the connector is mounted to the housing, on the one hand, the sealing performance after the connector is mounted to the housing is ensured, and on the other hand, the structural strength between the connector and the housing is also ensured.
Preferably, the flange and the case are made of the same metal material, the insulator is made of a glass material, the wire is made of a metal material, and the flange, the insulator and the wire are integrally formed by sintering. In this way, the connector can be realized in a simple and reliable solution.
Preferably, the filler includes butt portion, butt portion butt in casing and electric core to carry out spacingly to electric core. Further, the filling member further comprises two insulation sheets opposite to each other, and the two insulation sheets are positioned on two sides of the positive electrode tab and the connection sheet, so that the positive electrode tab and the connection sheet are separated from the casing by the insulation sheets. Further, the filling member further comprises a cylindrical portion with a bottom, the connector is mounted in the cylindrical portion, and the lead passes through the bottom of the cylindrical portion. In this way, the filling member can position each part in the housing and realize effective insulation between each part.
In the present invention, unless otherwise specified, "the longitudinal direction", "the width direction" and "the height direction" respectively refer to the longitudinal direction, the width direction and the height direction of a case (case main body) of a battery for an active implantable medical device, and the longitudinal direction, the width direction and the height direction are perpendicular to each other; "one side in the longitudinal direction" means the lower side in fig. 5, "the other side in the longitudinal direction" means the upper side in fig. 5, "one side in the width direction" means the left side in fig. 5, and "the other side in the width direction" means the right side in fig. 5.
The structure of a battery for an active implant medical device according to an embodiment of the present invention will be first described with reference to the accompanying drawings.
(Structure of Battery for active implant medical device according to one embodiment of the present invention)
As shown in fig. 1 to 10, a battery for an active implant medical device according to an embodiment of the present invention includes a case 1, a connector 2, a battery cell 3, a filler 4, and a connection piece 5 assembled together. The inside of the case 1 is formed with a housing space, and other components except the connector 2 are housed in the housing space of the case 1 and separated from the external environment in which the battery is used by the case 1 and the connector 2.
In the present embodiment, the case 1 is made of a metal material, and examples of the metal material include titanium, titanium alloy (Grade5, Grade9), aluminum alloy, stainless steel, and the like. The housing 1 includes a housing main body 11, a first end cap 12, and a second end cap 13. The first and second end caps 12 and 13 are fixed to the housing body 11 so that the housing body 11, the first end cap 12, and the second end cap 13 surround and form a housing space of the housing 1.
The housing body 11 is formed in a hollow structure penetrating along the longitudinal direction L thereof, and the cross section of the hollow structure taken along the width direction W and the height direction H is formed in an oblong shape whose major axis direction coincides with the width direction W. Thus, both side walls in the width direction W of the housing main body 11 are formed in curved arc shapes. Further, the housing main body 11 includes a first opening opened toward one side in the longitudinal direction L and a second opening opened toward the other side in the longitudinal direction L. In the present embodiment, the thickness of the case main body 11 is 0.25mm to 0.4 mm.
The first end cap 12 is fixed to the housing main body 11 so as to close the first opening. Specifically, as shown in fig. 6 to 8, the first end cap 12 is integrally formed with the housing main body 11 by deep drawing, and the first end cap 12 is formed in an arc shape. In the present embodiment, the thickness of the first end cap 12 is 0.25mm to 0.4 mm.
The second end cap 13 is formed separately from the housing main body 11, the second end cap 13 is fixed to the housing main body 11 in a sealed manner with the housing main body 11, and the second end cap 13 closes the second opening. Specifically, as shown in fig. 6 to 8, the second end cap 13 and the housing 1 are fixed together by means of laser welding. In the present embodiment, the thickness of the second end cap 13 is 0.5mm to 0.8 mm. Further, a mounting hole 13h penetrating the second end cap 13 along the longitudinal direction L is formed in a portion of the second end cap 13 on one side in the width direction, and the mounting hole 13h is used for mounting the connector 2.
As shown in fig. 6 to 8, in the present embodiment, the second end cap 13 is completely fitted into the second opening of the housing main body 11 so that the second end cap 13 and the side wall of the housing main body 11 completely overlap in the length direction L. When the second end cap 13 is fixed to the housing main body 11 by laser welding, the entire housing 1 is placed vertically (the length direction L coincides with the vertical direction). Along the laser irradiation direction shown in fig. 8, the position between the housing main body 11 and the second end cap 13 is irradiated with laser, the width of the weld is 0.5mm to 0.8mm and the depth of the weld is 2/3 or more of the thickness of the second end cap 13. In this way, the sealing performance between the second end cap 13 and the housing main body 11 after laser welding and the reliability of fixation to each other can be ensured.
By adopting the scheme, the whole shell 1 packaged by the hard shell is adopted to realize sealed packaging. Moreover, the housing 1 has low manufacturing cost and high efficiency, can realize the encapsulation of the implanted battery, ensures the long-term reliability of the battery and improves the safety.
In the present embodiment, the connector (also referred to as a feedthrough connector) 2 is attached to the attachment hole 13h of the second end cap 13, and is fixed to the second end cap 13 so as to be sealed with the case body 11. In this way, the housing space of the case 1 is sealed from the outside of the battery with the connector 2 fixed to the second end cap 13. Specifically, as shown in fig. 9 and 10, the connector 2 includes a flange 21, an insulator 22, and a wire 23 formed in one piece. The flange 21 is fixed to the housing 1 by, for example, laser welding, the lead 23 passes through the flange 21 via the through hole 21h, and the insulator 22 is located between the lead 23 and the flange 21.
The flange 21 is made of a metal material, and examples of the metal material include titanium, titanium alloy, aluminum alloy, stainless steel, and the like. The metal material of the flange 21 is the same as that of the housing 1. The flange 21 includes a large diameter portion 212 and a small diameter portion 211 formed integrally. The large diameter portion 212 and the small diameter portion 211 are each cylindrical in shape, and the outer diameter of the large diameter portion 212 is larger than that of the small diameter portion 211, so that the outer surface of the flange 21 is formed with a stepped structure. The flange 21 is housed in the housing space of the housing 1 and the cylindrical portion 43 of the filler 4. The small diameter portion 211 is inserted into the mounting hole 13h of the second end cap 13 of the housing 1 so that the stepped structure abuts against the second end cap 13 from the inside of the housing 1. In the present embodiment, the maximum outer diameter of the flange 21 is 2.5 to 4.5 mm.
The flange 21 is further formed with a through hole 21h penetrating in the axial direction of the flange 21, and the lead wire 23 is inserted into the housing space of the housing 1 through the through hole 21 h. In the present embodiment, the inner diameter of the flange 21 is 2mm to 4 mm.
The insulator 22 is made of a glass material, and the insulator 22 is located within the through hole 21h of the flange 21 and surrounds a portion of the wire 23 located in the through hole 21h, so that the insulator 22 spaces the wire 23 from the flange 21 and insulates each other.
The wire 23 may be made of a conductive material such as a titanium wire and a molybdenum wire, and the diameter of the wire 23 is 0.4mm to 0.5 mm. When the lead 23 penetrates the case 1 so as to be insulated from the flange 21 and the case 1, one end of the lead 23 is electrically connected to the positive electrode tab 31 via the connecting piece 5, and the other end of the lead 23 is also used for electrical connection to an active implantable medical device.
In the present embodiment, the flange 21, the insulator 22, and the lead 23 are integrally formed by sintering. Specifically, after the flange 21, the insulator 22 and the lead 23 are assembled in the structure of fig. 9 and 10, the assembled structure is subjected to high-temperature sintering at an environment of 850 ℃ to 950 ℃ for 20min to 40min, thereby obtaining the connector 2 having the structure shown in fig. 9 and 10.
In the present embodiment, the cell 3 is housed in a portion spaced apart from the second end cap 13 within the housing space. The battery cell 3 is formed with a positive electrode tab 31 and a negative electrode tab 32. The positive electrode tab 31 is formed in an elongated sheet shape and is bent at a right angle. The positive electrode tab 31 is spaced apart from the case 1 by the filler 4. The negative electrode tab 32 is formed in an elongated sheet shape, and the negative electrode tab 32 is not bent. The negative electrode tab 32 is electrically connected to the case body 11 by spot welding (laser spot welding or resistance spot welding), for example.
In the present embodiment, the filler 4 is made of an insulating material and is housed in the housing space. On one hand, the filling member 4 is located between the cell 3 and the second end cap 13, and the filling member 4 abuts against the second end cap 13 and the cell 3, so that the filling member 4 and the casing 1 position the cell 3 at a predetermined position of the accommodating space; on the other hand, the filler 4 also serves to space the portion of the lead 23 of the connector 2 located within the housing space and the positive electrode tab 31 from the case 1 to insulate each other. As shown in fig. 5 and 6, the filler 4 includes an abutting portion 41, two insulating sheets 42, and a bottomed cylindrical portion 43 formed integrally.
The abutment portion 41 extends entirely along the longitudinal direction L and has a constant dimension in both the width direction W and the height direction H. The two end portions in the length direction of the abutting portion 41 abut against the housing 1 and the battery cell 3 at the same time, so that the battery cell 3 is limited.
The two insulating sheets 42 are positioned on one side in the width direction with respect to the abutting portions 41. The two insulating sheets 42 face each other in the height direction H via the positive electrode tab 31 and the connecting sheet 5. Each insulating sheet 42 is expanded in the length direction L and the width direction W, and the two insulating sheets 42 are positioned on both sides in the height direction of the positive electrode tab 31 and the connecting sheet 5 so that the positive electrode tab 31 and the connecting sheet 5 are separated from the case main body 11 by the insulating sheet 42.
The cylindrical portion 43 is located at one side in the width direction with respect to the two insulating sheets 42. The cylindrical portion 43 is formed with an opening facing the other longitudinal side. The connector 2 is mounted in the cylindrical portion 43, and the lead 23 continues to extend into the housing space through the bottom of the cylindrical portion 43 and is connected to the connecting piece 5.
In the present embodiment, the connection piece 5 is made of a conductive material such as a metal material, which may be aluminum, nickel, or the like. The connecting piece 5 is formed in a sheet shape and has a thickness of 0.1mm to 0.2 mm. One end of the connecting piece 5 is connected with the lead 23, and the other end is connected with the positive electrode tab 31, so that the lead 23 and the positive electrode tab 31 are electrically connected through the connecting piece 5.
By adopting the technical scheme, the battery for the active implantation medical instrument realizes a stable electrical structure with a simple structure, and can ensure the stable performance and the service life of the battery.
The following describes the structure of a battery for an active implantable medical device according to a modification of an embodiment of the present invention.
(Structure of Battery for active implant medical device according to variation of one embodiment of the present invention)
The structure of the battery for an active implant medical device according to a modification of an embodiment of the present invention is substantially the same as that of the battery for an active implant medical device according to an embodiment of the present invention, and only the difference therebetween will be described below.
As shown in fig. 11, in a modification, the second end cap 13 is formed with a stepped structure, and the second end cap 13 is lapped on the other side end in the length direction of the housing main body 11. In this modification, the overlapping dimension of the second end cap 13 and the housing main body 11 overlapped together is 0.1mm to 0.2mm as viewed from the other side in the longitudinal direction, and the distance between the end surface of the second end cap 13 on the other side in the longitudinal direction and the end surface of the housing main body 11 on the other side in the longitudinal direction after the overlapping fitting is 0.2mm to 0.3 mm. When the second end cap 13 and the housing body 11 are welded together by laser welding, the housing 1 is vertically placed by the method described in the above-described one embodiment so that laser light is irradiated in the direction shown in fig. 11 to complete the laser welding.
As shown in fig. 12 and 13, in another modification, the second end cap 13 is formed with a stepped structure, and the second end cap 13 is lapped on the other side end in the length direction of the housing main body 11. The second end cap 13 and the wall of the housing body 11 are completely overlapped and substantially aligned with each other with a space of not less than 0.2mm as viewed from the other side in the longitudinal direction. When the second end cap 13 and the housing main body 11 are welded together by laser welding, the housing 1 is horizontally placed so that laser light is irradiated in the direction shown in fig. 13 to complete the laser welding, unlike the method described in the above-described one embodiment.
The battery for the active implantable medical device according to the present invention is not limited to the examples listed in the above embodiments, and supplementary description is made as follows.
(i) Although not specifically illustrated in the embodiment of the present invention, it is understood that the first and second end caps 12 and 13 may be formed separately from the housing main body 11, and the first and second end caps 12 and 13 are fixed to the housing main body 11 in a manner sealed with the housing main body 11.
Specifically, the housing body 11 may be formed by cutting off the bottom portion by stretch forming a metal profile, or formed directly into a shaped pipe and cut into a desired size to form the housing body 11. When the shaped pipe is directly molded, a material which is difficult to mold by stretch molding, such as TC4, may be selected. Further, the thickness of the housing main body 11 is preferably 0.25mm to 0.4mm, and the thickness of the second end cap 13 may be 0.5mm to 0.8 mm.
(ii) Although not specifically illustrated in the embodiment of the present invention, it is understood that the first and second end caps 12 and 13 and the housing body 11 are preferably made of the same metal material. Further, the thickness of the first end cap 12 is preferably larger than the thickness of the housing main body 11, and the thickness of the second end cap 13 is preferably larger than the thickness of the housing main body 11.
(iii) In addition, in an alternative embodiment, the wire 23 may include a core made of a conductive material and an insulating sheath wrapped outside the core, thereby further improving the insulating performance and safety performance of the core of the wire 23.
(iv) Although it is described in the above embodiment that the anode tab 32 is welded with the case main body 11, the present invention is not limited thereto. The negative tab 32 may be welded to the second end cap 13 to form an electrical connection.
(v) Although it is described in the above embodiment that the lead 23 is electrically connected to the positive electrode tab 31 via the connecting piece 5, the present invention is not limited thereto. When the position of the positive electrode tab 31 is adjusted so that the positive electrode tab 31 is exactly opposite to the lead 23, the connection piece 5 may be omitted so that the positive electrode tab 31 is directly connected to the lead 23.
Claims (10)
1. A battery for an active implantable medical device, comprising:
a case (1), the case (1) being made of a metal material and a housing space being formed inside the case (1);
a connector (2), the connector (2) being fixed to the case (1) in a manner sealed from the case (1) such that a housing space of the case (1) is sealed from an outside of the battery, the connector (2) including a lead wire (23), the lead wire (23) penetrating the case (1) in an insulated manner from the case (1) for transmitting electric energy to the active implantable medical device;
the battery cell (3) is accommodated in the accommodating space, a positive electrode lug (31) and a negative electrode lug (32) are formed on the battery cell (3), the positive electrode lug (31) is spaced from the shell (1) and is electrically connected with the lead (23), and the negative electrode lug (32) is electrically connected with the shell (1); and
a filler (4), the filler (4) being made of an insulating material and being received in the receiving space, the filler (4) and the case (1) positioning the battery cell (3) at a predetermined position of the receiving space, the filler (4) also serving to space a portion of the lead wire (23) located in the receiving space and the positive electrode tab (31) from the case (1) to be insulated from each other.
2. The battery for active implantable medical devices according to claim 1, further comprising a connecting tab (5), the connecting tab (5) being made of an electrically conductive material, the connecting tab (5) being connected with the lead (23) and the positive electrode tab (31) such that the electrical connection of the lead (23) and the positive electrode tab (31) is achieved via the connecting tab (5).
3. The battery for active implantable medical devices according to claim 1 or 2, characterized in that the housing (1) comprises:
a housing main body (11), wherein the housing main body (11) is formed into a hollow structure penetrating along a length direction (L), and the housing main body (11) comprises a first opening to one side of the length direction and a second opening to the other side of the length direction;
a first end cap (12), the first end cap (12) being fixed to the housing main body (11) in such a manner as to close the first opening; and
a second end cap (13), the second end cap (13) being fixed to the housing main body (11) in such a manner as to close the second opening,
the housing main body (11), the first end cover (12) and the second end cover (13) surround and form the receiving space.
4. The battery for active implantable medical devices according to claim 3,
the first end cap (12) is integrally formed with the housing main body (11), the second end cap (13) is formed separately from the housing main body (11), and the second end cap (13) is fixed to the housing main body (11) in a manner sealed with the housing main body (11); or
The first end cap (12) and the second end cap (13) are formed separately from the housing main body (11), and the first end cap (12) and the second end cap (13) are fixed to the housing main body (11) in a manner sealed with the housing main body (11).
5. The battery for active implantable medical devices according to claim 4, wherein the second end cap (13) is formed with a mounting hole (13h) penetrating the second end cap (13), the connector (2) is mounted to the mounting hole (13h) and fixed to the second end cap (13) in a manner sealed with the housing main body (11),
the battery cell (3) is spaced apart from the second end cap (13), the filler (4) is located between the battery cell (3) and the second end cap (13), and the filler (4) abuts against the second end cap (13) and the battery cell (3).
6. The battery for active implantable medical devices according to claim 4,
one of the housing main body (11) and the first end cap (12) is formed with a stepped structure to which the other of the housing main body (11) and the first end cap (12) is lapped, the housing main body (11) and the first end cap (12) being fixed together by welding; and/or
One of the housing main body (11) and the second end cap (13) is formed with a stepped structure to which the other of the housing main body (11) and the second end cap (13) is lapped, and the housing main body (11) and the second end cap (13) are fixed together by welding.
7. The battery for active implantable medical devices according to claim 6, characterized in that the first end cap (12) and the second end cap (13) each at least partially overlap a side wall of the housing body (11).
8. The battery for active implantable medical devices of claim 6, wherein the welding is laser welding.
9. The battery for active implantable medical devices according to claim 3, wherein the first end cap (12), the second end cap (13) and the housing body (11) are made of the same metal material, the thickness of the first end cap (12) is greater than the thickness of the housing body (11), and the thickness of the second end cap (13) is greater than the thickness of the housing body (11).
10. The battery for active implantable medical devices according to claim 1 or 2, wherein the connector (2) further comprises a flange (21) and an insulator (22), the flange (21) being inserted into the housing (1) and fixed to the housing (1) in a sealed manner with the housing (1), the lead wire (23) passing through the flange (21), the insulator (22) being located between the lead wire (23) and the flange (21).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110230942.9A CN113054294B (en) | 2021-03-02 | 2021-03-02 | Battery for active implanted medical instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110230942.9A CN113054294B (en) | 2021-03-02 | 2021-03-02 | Battery for active implanted medical instrument |
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| CN113054294B CN113054294B (en) | 2023-04-07 |
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| Publication number | Publication date |
|---|---|
| CN113054294B (en) | 2023-04-07 |
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