CN209822781U - Button cell - Google Patents
Button cell Download PDFInfo
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- CN209822781U CN209822781U CN201920732120.9U CN201920732120U CN209822781U CN 209822781 U CN209822781 U CN 209822781U CN 201920732120 U CN201920732120 U CN 201920732120U CN 209822781 U CN209822781 U CN 209822781U
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Abstract
The utility model discloses a button cell, including negative pole lid, anodal casing, sealing washer, anodal, diaphragm, negative pole and electrolyte, anodal slide includes that radial direction pierces through the through hole of anodal slide, and the through hole is close to the internal surface parallel and level of anodal ring one side and anodal ring, and the surface of anodal ring meets with the internal surface of anodal casing, forms the welding point so that anodal ring surface and anodal casing form via the through hole welding anodal ring internal surface. According to the button cell, the through hole is formed in the positive electrode polished section, so that welding can be performed from the inner surface of the positive electrode ring, and a welding point is formed on the outer surface of the positive electrode ring and the inner surface of the positive electrode shell, so that the welding method ensures that the positive electrode can be centered, improves the quality of the cell, is more beneficial to the leakage resistance of the cell and greatly reduces the leakage risk of the cell; meanwhile, a through hole formed by the positive electrode polished section can be used as an electrolyte storage bin for storing electrolyte, so that the electrical property of the battery is ensured.
Description
Technical Field
The utility model relates to a button cell field especially relates to a button cell.
Background
With the increasing development of electronic products, button cells are widely used in various miniature electronic products due to their lightness and smallness, and are mainly used as backup power sources for various electronic products, such as computer motherboards, electronic watches, electronic dictionaries, electronic scales, memory cards, remote controllers, CPC cards, electronic display screens, and the like, and the requirements of people on button cells are increasing. Button cells are not only portable, but also require ultra-high capacity and service life, and therefore new button cells are developed to meet market demands.
The existing button cell comprises a positive electrode shell, a negative electrode cover, and an electric core and electrolyte which are arranged in a sealing cavity formed between the positive electrode shell and the negative electrode cover, wherein the electric core comprises a positive electrode, a diaphragm, a negative electrode and the like, and the positive electrode, the diaphragm and the negative electrode are sequentially stacked to form the electric core. The situations of electric core movement, liquid leakage and the like can occur in the packaging process and the use process of the battery of the positive shell and the negative cover, and the service life is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a button cell battery, which solves the problem of voltage drop of the battery at high temperature and improves the large current discharge performance of the battery.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the embodiment of the utility model provides a button cell, including negative pole lid, positive pole casing, sealing washer, positive pole, diaphragm, negative pole and electrolyte, wherein, the sealing washer sealing connection the negative pole lid with the positive pole casing, and make the negative pole lid with the positive pole casing form sealed chamber, positive pole, diaphragm, negative pole and electrolyte locate in the sealed chamber; the positive pole piece comprises a positive pole piece and a positive pole ring concentrically arranged on the outer surface of the positive pole piece, the positive pole piece comprises a through hole penetrating through the positive pole piece in the radial direction, the through hole is close to one side of the positive pole ring and is flush with the inner surface of the positive pole ring, the outer surface of the positive pole ring is connected with the inner surface of the positive pole shell, and the inner surface of the positive pole ring is welded through the through hole so that the outer surface of the positive pole ring and the positive pole shell form a welding point.
Wherein the positive plate is concentric with the positive shell.
The positive electrode ring is uniformly provided with through holes, the diameter of each through hole is 1.0-8.0mm, and the thickness of the positive electrode ring is 0.1-0.2 mm.
The center of the positive electrode ring extends to the positive electrode shell to form a bulge, and the bulge is welded through the through hole to enable the bulge and the positive electrode shell to form a welding point.
Wherein the protrusion is at least one of the following shapes: circular, rectangular, trapezoidal, inverted U-shaped, and circular arc.
And the outer surface of the positive ring is in resistance welding or laser welding or ultrasonic welding with the positive shell.
The positive electrode shell is inwards abutted against the convex surface towards the direction of the positive electrode plate to form a concave surface.
Wherein the through holes are uniformly arranged along the central position of the positive polished section, the diameter of each through hole is 1.0-6.0mm,
an embodiment of the utility model provides a pair of button cell, including negative pole lid, anodal casing, sealing washer, anodal, diaphragm, negative pole and electrolyte, wherein, sealing washer sealing connection the negative pole lid with anodal casing, and make the negative pole lid with anodal casing forms the sealed chamber, anodal piece include anodal slide and set up with one heart in the anodal ring of anodal slide surface, anodal slide includes that radial direction pierces through the through hole of anodal slide, the through hole is close to anodal ring one side with the internal surface parallel and level of anodal ring, the surface of anodal ring with the internal surface of anodal casing meets, via the through hole welding anodal ring internal surface is so that anodal ring surface with anodal casing forms the welding point. According to the button cell, the through hole is formed in the positive electrode polished section, so that welding can be performed from the inner surface of the positive electrode ring, and a welding point is formed on the outer surface of the positive electrode ring and the inner surface of the positive electrode shell, so that the welding method is more beneficial to the leakage resistance of the cell, and the liquid leakage risk of the cell is greatly reduced; meanwhile, a through hole formed by the positive electrode polished section can be used as an electrolyte storage bin for storing electrolyte, so that the electrical property of the battery is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a button cell provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a button cell provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a positive electrode ring provided in an embodiment of the present invention;
fig. 4 is a schematic structural view of an anode light sheet according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a method for manufacturing a button cell provided in an embodiment of the present invention.
Detailed Description
For the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art. The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
Referring to fig. 1 and fig. 2, a button cell provided in an embodiment of the present invention includes a negative electrode cover 1, a positive electrode case 2, a sealing ring 3, a positive electrode 4, a diaphragm 5, a negative electrode 6, and an electrolyte, where the sealing ring 3 is hermetically connected to the negative electrode cover 1 and the positive electrode case 2, and the negative electrode cover 1 and the positive electrode case 2 form a sealed cavity, and the positive electrode 4, the diaphragm 5, the negative electrode 6, and the electrolyte are disposed in the sealed cavity; anodal 4 includes anodal casing 2 and locates anodal piece 8 in the anodal casing 2, anodal piece 8 include anodal smooth sheet 81 and set up with one heart in anodal ring 82 of anodal smooth sheet 81 surface, anodal smooth sheet 81 includes that radial direction pierces through the through-hole 7 of anodal smooth sheet 81, through-hole 7 is close to anodal ring 82 one side with anodal ring 82's internal surface parallel and level, anodal ring 82's surface with anodal casing 2's internal surface meets, via the through-hole 7 welding anodal ring 82 internal surface is so that anodal ring 82 surface with anodal casing 2 forms welding point 9.
Here, the positive electrode ring 82 is provided with a burr-like pinhole, and the positive electrode optical sheet 81 and the positive electrode ring 82 are bonded together by a tablet machine in a punched form, so that actually the positive electrode powder or the positive electrode optical sheet 81 is embedded in the positive electrode ring 82 and is tightly bonded together by the burr.
The positive electrode 4 may be made of a positive electrode material such as manganese dioxide; the separator 5 may be a fibrous membrane or the like to separate the positive electrode 4 and the negative electrode 6 and be capable of adsorbing the electrolytic solution; the negative electrode 6 may be made of a negative electrode material such as lithium. The cathode cover 1 and the anode casing 2 are both circular cover structures made of metal materials, and the sealing ring 3 may be made of an insulating material with sealing performance, such as an annular plastic ring or an annular rubber ring. The diameter of the separator 5 is larger than not only the diameter of the cross section of the positive electrode 4 but also the diameter of the cross section of the negative electrode 6 to ensure that the positive electrode 4 and the negative electrode 6 can be completely separated.
It is understood that the structures of the negative electrode cover 1, the positive electrode shell 2, the sealing ring 3, the separator 5, the negative electrode 6, and the like may be substantially the same as the structures of the corresponding components in the existing button cell, and will not be described in detail in this embodiment.
As an alternative embodiment, the positive electrode ring 82 is pressed on the positive electrode sheet 8 during the production process of the positive electrode sheet 8 to form a whole.
One side of the through hole 7 close to the positive electrode ring 82 is flush with the inner surface of the positive electrode ring 82, that is, the through hole 7 may be a hole which is punched completely through the positive electrode ring 81, see fig. 1, or only one through hole 7 is processed on the positive electrode polished section 81 inlaid on the positive electrode ring 82, the positive electrode ring 82 is not punched completely, see fig. 2, and the depth of the through hole 7 is just in contact with the inner surface of the positive electrode ring 82; the outer surface of the positive electrode ring 82 is in contact with the inner surface of the positive electrode case 2, and the inner surface of the positive electrode ring 82 is welded via the through hole so that the outer surface of the positive electrode ring 82 and the positive electrode case 2 form a welding point 9. Therefore, the through hole 7 in the positive electrode polished section 81 ensures that the welding medium can enter the outer surface of the positive electrode ring 82, the positive electrode ring 82 and the positive electrode shell 2 can be effectively welded, the positive electrode shell 2 cannot be welded through, the welding is more stable, meanwhile, the through hole 7 of the positive electrode polished section 81 can be used as a micro electrolyte bin for storing electrolyte, and the electrical property of the battery is ensured.
In an alternative embodiment, the positive electrode tab 8 is concentric with the positive electrode can 2. Here, the central position of the positive electrode ring 82 extends towards the positive electrode shell 2 to form a protrusion, the positive electrode plate 8 is welded with the inner surface of the positive electrode shell 2 through the protrusion, the positive electrode plate 8 can be concentric with the positive electrode shell 2 in the assembling process, no offset is generated, the quality (appearance qualification rate) of the battery is improved, the appearance unqualified conditions such as 'flash' of the thin small battery can be avoided when the positive electrode plate 8 is not centered, in addition, after the welding is completed, the positive electrode plate 8 and the positive electrode shell 2 form a component, and the efficiency of a production line can also be improved.
In an optional embodiment, through holes 10 are uniformly arranged on the positive electrode ring 82, the diameter of each through hole 10 is 2.0-8.0mm, and the thickness of the positive electrode ring 82 is 0.1-0.2 mm.
As an alternative embodiment, the number of the through holes 10 is at least six.
Generally, the number of the through holes 10 is six to ten, and further, referring to fig. 3, the button cell can be CR3832, the positive ring 82 is uniformly provided with the through holes 10, wherein the number of the through holes is twelve, the diameter of the through holes 10 is 2.0-8.0mm, and the thickness of the positive ring 82 is 0.1-0.2 mm.
In the above embodiment, the through holes 9 are uniformly formed in the current collecting ring 7, and the through holes 9 can allow the active material of the positive electrode 2 to have more volume in the current collecting ring 7, so as to accommodate more active material and improve the battery capacity; meanwhile, the through hole 9 is also beneficial to the electrolyte to infiltrate the anode 2.
In an alternative embodiment, the center of the positive electrode ring 82 extends toward the positive electrode case 2 to form a protrusion, and the protrusion is welded via the through hole 7 so that the protrusion forms a welding point 9 with the positive electrode case 2.
As an alternative embodiment, the protrusions can be placed on both sides of the central position of the positive ring 82, where the specific location is not limited without affecting the balance of the button cell. It should be noted that, for convenience in assembly and processing, a boss is generally selected to be arranged at the center of the positive electrode ring 82, so as to facilitate the concentricity of the positive electrode sheet 8 and the positive electrode casing 2, and further facilitate the one-step positioning during welding.
Here, in the production process of the positive plate 8 of the button cell, the positive ring 82 may be disposed on the outer surface of the positive optical sheet 81, and may be embedded thereon, and the positive ring 82 and the positive optical sheet 81 may be formed by stamping in the production process of the positive plate 8, so that a protrusion is formed on the positive ring 82 toward the positive housing 2 side through a concave structure in the process.
In an alternative embodiment, the protrusion is at least one of the following shapes: circular, rectangular, trapezoidal, inverted U-shaped, and circular arc.
In an alternative embodiment, the positive electrode tab 8 is resistance welded or laser welded or ultrasonic welded to the inner surface of the positive electrode case 2 through the protrusions.
In the following, laser welding is taken as an example, which is an efficient precision welding method using a laser beam with high energy density as a heat source. Laser welding is one of the important aspects of the application of laser material processing techniques. Here, at the in-process of production button cell, adopt laser welding more to be favorable to button cell's volume production, production efficiency is higher simultaneously, and the precision is better, has guaranteed the welded steadiness simultaneously.
In an alternative embodiment, the positive electrode case 2 is pressed inward against the convex surface in the direction of the positive electrode sheet 8 to form a concave surface 21.
Here, can provide a resilience force of forbidding deformation to outer model deformation in the crowded process of rising of button cell high temperature, guarantee anodal casing 2 and protruding welded steadiness, guarantee that the battery is high temperature resistant, the inside contact is good.
In an alternative embodiment, the through holes 7 are uniformly arranged along the central position of the positive light sheet 81, and the diameter of the through holes 7 is 1.0-6.0 mm.
Here, the through hole may be formed by a mechanical punching process, or may be formed by a special process such as laser or ultrasonic processing; the position of the through hole is not limited to the central position, and the number of the through holes is not limited to one.
In another embodiment, as shown in fig. 5, there is also provided a method for preparing a button cell, the method comprising:
step S101: punching the positive electrode ring to form a through hole, and pressing a positive electrode polished section on the inner surface of the positive electrode ring to form a positive electrode sheet;
here, the positive electrode ring is provided with a burr-like pinhole, and the positive electrode polished section and the positive electrode ring are combined by the tablet machine in a stamping manner, so that the positive electrode powder or the positive electrode polished section 81 is actually embedded in the positive electrode ring and is tightly combined together by the burr.
Step S102: welding the anode sheet to the side of the anode ring along the center position of the anode sheet to form a through hole, and welding the inner surface of the anode ring through the through hole to enable the outer surface of the anode ring and the anode shell to form a welding point 9;
here, the through hole may be formed by a mechanical punching process, or may be formed by a special process such as laser or ultrasonic processing; the position of the through hole is not limited to the central position, and the number of the through holes is not limited to one.
Step S103: adding electrolyte into the positive electrode shell to submerge the positive electrode;
step S104: covering a negative electrode cover group with the positive electrode shell, wherein the negative electrode cover group comprises a negative electrode cover, a sealing ring, a negative electrode and a diaphragm;
specifically, an opening of a negative electrode cover group provided with a negative electrode and a diaphragm is downwards arranged in a positive electrode shell provided with a positive electrode, and a sealing ring is opposite to the top wall of the base to form sealing.
And sequentially injecting sealing rings on the outer edge of the negative electrode cover, placing the punched negative electrode in the negative electrode cover through a square rounding process, and then punching a diaphragm to form a negative electrode cover group comprising the negative electrode cover, the sealing rings, the negative electrode and the diaphragm.
Step S105: and placing the covered negative electrode cover group and the positive electrode shell in a vacuum environment, standing and sealing.
To sum up, compare with prior art, the embodiment of the utility model provides a button cell and button cell's preparation method beneficial effect is through ingenious in anodal production process positive polar ring and radial direction have been designed and have been penetrated the through hole of anodal light piece, the through hole is close to anodal ring one side with the internal surface parallel and level of anodal ring, the surface of anodal ring with the internal surface of anodal casing meets, via the through hole welding anodal ring internal surface is so that anodal ring surface with anodal casing forms the welding point for button cell collects good stability, high capacity nature, high life, the simple various advantages of preparation simple process in an organic whole. In particular, the amount of the solvent to be used,
1. the positive plate and the positive shell are concentric by welding, so that the quality (appearance qualification rate) of the battery is improved, the condition that the appearance of the thin small battery is unqualified such as 'flash' and the like when the positive plate is not centered is avoided, and in addition, after the welding is finished, the positive plate and the positive shell form a component, so that the efficiency of a production line can be improved;
2. the welding can be realized from the inner surface of the anode ring, so that a welding point is formed between the outer surface of the anode ring and the inner surface of the anode shell, the welding method is more beneficial to the leakage resistance of the battery, and the leakage risk of the battery is greatly reduced;
3. the through hole formed by the positive electrode polished section can be used as an electrolyte storage bin for storing electrolyte, so that the electrical property of the battery is ensured, and the storage property of the battery at high temperature is improved;
4. the battery is prevented from bursting at high temperature, and the safety performance of the battery at high temperature is improved;
5. the current collecting effect is better, the internal contact of the battery is ensured to be good under the condition that the battery is expanded at high temperature, and the problem that the voltage of the battery with large diameter drops at high temperature is thoroughly solved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention are all included within the protection scope of the present invention.
Claims (8)
1. A button cell comprises a negative electrode cover, a positive electrode shell, a sealing ring, a positive electrode, a diaphragm, a negative electrode and electrolyte, wherein the sealing ring is connected with the negative electrode cover and the positive electrode shell in a sealing manner and enables the negative electrode cover and the positive electrode shell to form a sealing cavity; the anode comprises an anode shell and an anode plate arranged in the anode shell, the anode plate comprises an anode polished section and an anode ring concentrically arranged on the outer surface of the anode polished section, the anode polished section comprises a through hole penetrating through the anode polished section in the radial direction, the through hole is close to one side of the anode ring and flush with the inner surface of the anode ring, the outer surface of the anode ring is connected with the inner surface of the anode shell, and the outer surface of the anode ring is welded with the inner surface of the anode ring so that the outer surface of the anode ring and the anode shell form a welding point.
2. The button cell battery according to claim 1, wherein the positive plate is concentric with the positive casing.
3. The button cell according to claim 1, wherein the positive electrode ring is uniformly provided with through holes, the diameter of each through hole is 1.0-8.0mm, and the thickness of the positive electrode ring is 0.1-0.2 mm.
4. The button cell according to claim 1, wherein the central position of the positive ring extends to the positive casing to form a protrusion, and the protrusion is welded via the through hole so that the protrusion forms a welding point with the positive casing.
5. A button cell according to claim 4, characterized in that the protrusions are at least one of the following shapes: circular, rectangular, trapezoidal, inverted U-shaped, and circular arc.
6. The button cell according to claim 1, wherein the outer surface of the positive ring is resistance welded or laser welded or ultrasonic welded to the positive casing.
7. The button cell according to claim 4, wherein the positive casing is pressed inward against the convex surface in the direction of the positive plate to form a concave surface.
8. The button cell according to claim 1, wherein the through holes are uniformly arranged along the center of the positive optical sheet, and the diameter of the through holes is 1.0-6.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920732120.9U CN209822781U (en) | 2019-05-21 | 2019-05-21 | Button cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920732120.9U CN209822781U (en) | 2019-05-21 | 2019-05-21 | Button cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209822781U true CN209822781U (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920732120.9U Active CN209822781U (en) | 2019-05-21 | 2019-05-21 | Button cell |
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| Country | Link |
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| CN (1) | CN209822781U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048137A (en) * | 2019-05-21 | 2019-07-23 | 宜昌力佳科技有限公司 | The preparation method of button cell and button cell |
-
2019
- 2019-05-21 CN CN201920732120.9U patent/CN209822781U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048137A (en) * | 2019-05-21 | 2019-07-23 | 宜昌力佳科技有限公司 | The preparation method of button cell and button cell |
| CN110048137B (en) * | 2019-05-21 | 2024-05-21 | 宜昌力佳科技有限公司 | Button cell and preparation method thereof |
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