CN1248326C - cylindrical alkaline Zn battery sealing structure - Google Patents
cylindrical alkaline Zn battery sealing structure Download PDFInfo
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- CN1248326C CN1248326C CNB031039022A CN03103902A CN1248326C CN 1248326 C CN1248326 C CN 1248326C CN B031039022 A CNB031039022 A CN B031039022A CN 03103902 A CN03103902 A CN 03103902A CN 1248326 C CN1248326 C CN 1248326C
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- battery
- sealing
- explosion
- negative electrode
- sealing ring
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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
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- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a cylindrical alkaline solutionThe battery sealing structure with Zn paste as the negative electrode comprises: the copper nail (7) inserted into the cathode zinc paste (9) is welded with the lower cathode cover (2). The upper negative electrode cover (4) is connected with the lower negative electrode cover (2), an explosion-proof ball (3) is arranged between the upper negative electrode cover and the lower negative electrode cover to form a negative electrode current collector, and the negative electrode current collector and the sealing ring (5) are arranged together to form a sealing body. The sealing body is arranged in a steel cylinder (6), and the sealing ring (5) is compressed in the radial and axial directions by the processes of rolling grooves (62) and curling (63) so as to achieve the aim of sealing the battery. The sealing structure is suitable for cylindrical primary or secondary batteries with Zn paste as negative electrode in various shapes, such as Zn-MnO 2 And a Zn-Ni battery.
Description
Technical Field
The invention relates to an improved sealing structure in a cylindrical primary chemical power supply and a cylindrical secondary chemical power supply.
Background
The cylindrical alkaline battery is easy to creep alkali and leak liquid due to the good soakage between the KOH solution and the steel cylinder and the large internal gas pressure. The currently produced circular alkaline zinc-manganese primary battery is sealed in the following way: the cathode is made of zinc paste, and a copper nail is inserted into the zinc paste to be used as a current collector. The copper nails are welded with the cathode cover and then inserted into the middle hole of the sealing ring to assemble a sealing body. Then it is put into a steel cylinder with positive and negative poles. The outer diameter of the sealing ring is matched with the inner diameter of the opening of the steel cylinder. The outer diameter of the negative cover or another metal gasket is matched with the sealed outer inner diameter of the sealing ring.
See figure 1 for the drum runner (62). Then the outer diameter of the steel cylinder is shrunk and the mouth part is bent downwards (63). When the cylinder mouth is bent downwards along the axial direction of the steel cylinder, the lower part of the sealing surface of the sealing ring props against the rolling groove (64) of the steel cylinder and can not move downwards any more, and is compressed axially. When the outer diameter of the opening of the steel cylinder is compressed, the inner part of the sealing surface of the sealing ring is propped against a negative cover or a gasket (55) shown in figure 9, and the sealing ring is also compressed in the radial direction. Therefore, the sealing ring is compressed in the axial and radial directions to seal the battery, so that the aim of preventing liquid leakage is fulfilled.
Gas is often generated inside the battery, a large amount of gas is generated in the primary battery due to corrosion of zinc, or air or K is mixed during assembly 2 CO 3 . Long battery standing time or expansion by hot air, K 2 CO 3 Decompose to release CO 2 And the gas pressure inside the battery increases for other reasons. The battery has a possibility of explosion. The solution is that when the internal pressure of the battery exceeds a certain pressure, the weak part of the sealing ring is broken and gas is generatedFrom there, the body is discharged out of the battery through the small hole of the negative cover. The internal air pressure of the battery is reduced and the battery cannot explode. We call the weak point of the sealing ring as a safety door. The thickness of the safety door can control the internal pressure of the battery. But the sealing ring safety door cannot recover after being opened so that the electro-hydraulic fluid leaks out of the safety door. The battery can no longer be used. The secondary alkaline zinc-manganese dioxide battery with the cylindrical anode in a ring shape and the cathode in a zinc paste also adopts the structure. When overcharged, O is generated 2 The internal pressure increases, the safety door opens and the battery fails.
The inside of the cylindrical cadmium-nickel and hydrogen-nickel secondary battery is in a winding type, a negative electrode lead is welded at the bottom of the steel cylinder, and a positive electrode lead is welded at the lower positive electrode cover. An explosion-proof plug is arranged between the connection of the lower positive cover and the upper positive cover. The middle of the lower positive electrode cover is provided with an air hole, when the pressure inside the battery is increased due to overcharge or self-discharge, the air passes through the air hole of the lower positive electrode cover to compress the explosion-proof plug, and the air is provided with a pore passage and is discharged out of the battery through the air hole of the upper positive electrode cover. The gas is discharged, the internal gas pressure of the battery is reduced, and the explosion-proof plug is restored to the original shape to ensure that the battery is still sealed and liquid leakage is avoided. The battery can be continuously used after being recovered. However, in the battery using the paste as the negative electrode, the current cannot be drawn from the negative electrode.
Disclosure of Invention
The invention aims to improve the sealing structure of a cylindrical primary or secondary zinc battery taking zinc paste as a cathode, and the gas generated in the process of placing or charging the battery can be recovered to be continuously used without being scrapped after being discharged under a certain pressure, so that the utilization rate and the explosion-proof capability of the battery are improved.
The technical scheme involved in the invention is as follows:
the sealing structure of the cylindrical Cd-Ni battery is improved and then used in the cylindrical battery with cathode made of calamine cream. The battery takes the zinc paste as a negative electrode, current needs to be led out by a negative electrode current collector copper nail, and the copper nail needs to be positioned in the middle of the zinc paste, so that the zinc paste has uniform reaction and high utilization rate. Thus, a copper nail (7) is welded in the middle of the lower negative electrode cover (2) (for the winding type Cd-Ni battery, the lower positive electrode cover is used, and the battery polarity with Zn paste as the negative electrode is used as the negative electrode, and the lower negative electrode cover is called). The vent hole of the lower cathode cover (2) must be moved sideways, and in order to ensure that the explosion-proof plug (3) is compressed uniformly, the vent hole of the lower cathode cover (2) is changed from one hole into two symmetrical holes, which is shown in fig. 2 (21). The upper negative electrode cover (4) is flatly placed on the edge of the lower negative electrode cover (2), as shown in fig. 2 (22), and the explosion-proof plug (3) is placed in the middle. The edge (23) of the lower negative cover (2) is bent upwards at the edge (41) of the upper negative cover (4), so that the upper negative cover and the lower negative cover are tightly connected (81) to form a negative current collector, and the negative current collector is shown in figure 8.
The assembled negative current collector is inserted into a central hole (51) of the sealing ring (5), and the upper part (72) of the copper rod of the copper nail (7) is in interference fit with the central hole (51) of the sealing ring (5). The lower negative electrode cover (2) is placed at the position (55) of the sealing ring (5) to be tightly matched to form a sealing body, and the sealing body is shown in figure 9. The sealing body is inserted into the cathode zinc paste filled in the copper cylinder, the copper nail is arranged in the middle of the zinc paste, and current flows to the zinc paste from the copper nail when the battery discharges, so that the active material zinc in the zinc paste can be fully utilized. The seal ring (5) (56) is seated on the rolling groove (64) on the steel cylinder (6), and the outer diameter of the seal ring is tightly matched with the inner diameter of the steel cylinder. The steel cylinder (6) is contracted radially and axially at the opening part (63) of the steel cylinder by sealing equipment, so that the sealing surface (52) of the sealing ring (5) is compressed radially and axially to seal the battery.
The invention is characterized in that:
a sealing structure of a cylindrical battery using paste Zn or ZnO as a cathode comprises a lower cathode cover (2), an explosion-proof plug (3), an upper cathode cover (4), a sealing ring (5), a steel cylinder (6) and a copper nail (7), wherein the lower cathode cover (2) is welded with the copper nail (7), the lower cathode cover (2) is connected with the upper cathode cover (4), the explosion-proof plug (3) is placed in the middle, the copper nail (7) is inserted into a middle hole of the sealing ring (5), the lower cathode cover (2) is fixed on the upper part of the sealing ring (5) along with the tape, the copper nail (7) is inserted into the battery cathode zinc paste (9), meanwhile, the sealing ring (5) is tightly matched with the opening part of the steel cylinder (6), and the sealing ring (5) is compressed in the radial and axial directions through a rolling groove and a curling edge on the upper part of the steel cylinder (6), so that the battery is sealed. When the internal air pressure of the over-charge or self-discharge battery is increased, the air flows out from the air vent (53) of the sealing ring and uniformly flows out through the two holes (21) of the lower negative electrode cover (2), so that the explosion-proof plug (3) is stressed, and the compressed air of the explosion-proof plug (3) overflows out of the battery through the holes (42) of the upper negative electrode cover (4). After the gas pressure in the battery is reduced, the explosion-proof plug (3) restores the original shape and presses two holes (21) of the lower cathode cover (2) to prevent the gas from overflowing. The cell is sealed against leakage and can be used continuously.
The mercury-free zinc paste has the advantages that the surface can not be amalgamated after the copper nails are inserted, the Zn is easily corroded by itself due to the dissolution of Cu, and the air pressure in the battery is increased. The surface (75) of the copper nail (7) is plated with In or Sn, the hydrogen overpotential on the In or Sn is higher, and the page 3/4 of hydrogen is not easy to generate and self-corrosion is not easy to occur. If the surface coating of the copper nail (7) is damaged, copper scraps fall into zinc paste, or copper is dissolved in electrolyte, and the corrosion of Zn is accelerated. The surface coating of the copper nail (7) must not be damaged in the whole sealing body assembling process. The upper diameter and the lower diameter of a copper rod of a copper nail sold in the market are consistent, the size of the copper rod is in interference fit with a middle hole of a sealing ring, the surface of the copper nail is easily damaged when the copper nail is inserted into the middle hole of the sealing ring, and the position really needing the interference fit is only about 5mm at the contact position of the copper nail and the sealing ring. The diameter of the upper part of the copper nail, which is 5mm, is in interference fit with the middle hole of the sealing ring, and the diameters of other parts are smaller than the diameter of the middle hole of the sealing ring, so that the surface of the copper nail is not easy to damage during assembly, and the interference fit with the sealing ring is not influenced.
The copper nail (7) is lengthened by 5mm compared with the original one. When the size of the AA type battery is increased to 35mm from 30mm, most of Zn is converted into ZnO at the later stage of battery discharge, znO is not conductive, and the internal resistance of a negative electrode is increased during charging. The length of the copper nail is increased, namely the contact surface area of the copper nail and the negative electrode is increased, and the conductivity is increased.
The copper nail welding part (71) is arc-shaped, and the molten copper welded with the lower negative electrode cover (2) flows in the concave part, so that the copper scraps after welding are reduced. The falling of these copper shavings into the cell greatly accelerates the corrosion of Zn.
The shape of the explosion-proof plug (3) is trapezoidal and elastic. The bearing pressure of the explosion-proof plug (3) can be changed by changing the thickness of the explosion-proof plug (3), and the requirement is different according to different battery conditions, and can be from 2MPa to 8MPa. The thickness of the negative electrode cover changes along with the thickness change of the explosion-proof plug, so that the upper negative electrode cover and the lower negative electrode cover are in good contact, and the outer diameter of the assembled part is tightly combined with the inner diameter of the sealing surface of the sealing ring (5). The copper nail (7) is made of brass H62-68, the surface of the copper nail is plated with In or Sn, the copper nail is In the shape of an iron nail, the diameter of the nail rod is thick at the upper part and thin at the lower part, the diameter of the upper thick part is In interference fit with the middle hole of the sealing ring (5), the copper nail platform is concave, and the welding head is In the shape of an arc. The material of the sealing ring (5) is polypropylene or nylon 66, the outer diameter of the sealing surface of the sealing ring (5) is closely matched with the inner diameter of the opening of the steel cylinder (6), the inner diameter of the sealing surface is closely matched with the outer diameter of the negative electrode collector, 2-3 air holes are formed, and the copper nails (7) in the middle hole of the sealing ring (5) are matched in a sufficient mode. The steel cylinder (6) is made of 08F carbon steel plated with Ni, the thickness of the Ni plated layer is 2-4 microns on the outer layer, 1-3 microns on the inner wall, the wall thickness of the steel cylinder is 0.2-0.35 mm, and the inner diameter of the opening of the steel cylinder is tightly combined with the outer diameter of the sealing surface of the sealing ring (5). The sealing surface of the sealing ring (5) is reduced by hand pressure to 15-40% and axially compressed to 20-50% through rolling groove and edge on the steel cylinder.
The structure can be used not only for secondary zinc batteries, but also for primary alkaline zinc batteries. Primary alkaline Zn-MnO 2 The sealing ring used in the original battery sealing structure is difficult to control due to the thickness of the safety valve, the price of the plastic forming mould is higher, and the sealing ring is installedThe sealing ring safety valve is easy to damage and fail in the process of matching and is difficult to check. The brand reputation is influenced because of the liquid leakage that breaks of safety valve in the product sales process. The sealing structure of the invention is thick and cannot crack or damage the explosion-proof plug (3) when being assembled. In case of increasing gas in the battery, the explosion-proof plug (3) can play an explosion-proof role. Gas escape from the batteryAnd then the explosion-proof plug is recovered, and the battery can still be used and cannot be scrapped.
Zn-Ni、Zn-MnO 2 The secondary battery is difficult to control during charging without overcharging. Large amount of O generated inside the battery when overcharged 2 The negative electrode has too late to consume O in combination 2 The internal gas pressure of the battery is very high, and the battery can be continuously used without leakage after the gas is overflowed by adopting the sealing structure of the invention, so that the loss of the secondary battery is greatly reduced.
Drawings
FIG. 1 is a longitudinal sectional view of a Zn-Ni primary battery fabricated using the sealing structure of the present invention.
In the figure, 2 a lower cathode cover, 3 an explosion-proof plug, 4 an upper cathode cover, 5 sealing rings, 6 steel cylinders, 7 copper nails, 9 cathode calamine cream, 10 diaphragm pipes and 11 anode rings.
Fig. 2-7 are the shape diagrams of the components used in the cylindrical press ring type battery, fig. 7 copper nail, fig. 2 lower negative electrode cover, fig. 3 explosion-proof plug, fig. 4 upper negative electrode cover, fig. 5 sealing ring, fig. 6 steel cylinder. Wherein the size is zero 4/4 inch of AA size cylindrical battery.
Fig. 8 is a cross-sectional view of the negative electrode current collector with 2 lower negative electrode cap, 3 explosion proof plug, 4 upper negative electrode cap, 7 copper nail.
Fig. 9 is a cross-sectional view of the seal, 2 lower negative cover, 3 explosion proof plug, 4 upper negative cover, 5 sealing ring, 7 copper nail.
Detailed Description
Example (b): cylindrical Zn-Ni primary batteries of AA size and Zn-MnO were fabricated according to the sealing structure 2 Five each. The parts are manufactured in the shape and dimensions of fig. 2-7: the device comprises a lower negative electrode cover, an explosion-proof plug, an upper negative electrode cover, a sealing ring, a steel cylinder and a copper nail. The copper nail (7) is welded in the middle of the lower cathode cover (2) and is vertical to the lower cathode cover (2) so as not to block the air hole (21) of the lower cathode cover (2). The upper negative electrode cover (4) is flatly placed on the lower negative electrode cover (2), and the explosion-proof plug (3) is placed in the middle to assemble a negative electrode current collector (figure 7). The upper negative electrode cover (4) is fixed and well contacted with the lower negative electrode cover (2) according to (81) and (82). It is inserted into the central hole (51) of the sealing ring (5), the outer diameter of the central hole is tightly matched with the inner diameter of the sealing surface of the sealing ring (5) (55), and a sealing body is formed (figure 8). The sealing body is vertically inserted into a steel cylinder (6) provided with a positive pole and a negative pole. The top of the sealing ring is 0.5mm lower than the opening of the steel cylinder. The steel cylinder (6) is rolled into a groove (62). The external diameter of the steel cylinder mouth is contracted to phi 13.8 +/-0.05 mm by using a die, and the cylinder mouth is buckled to ensure that the height of the edge curling position at the central position of the rolling groove is 2.5mm, so that the battery is sealed (see figure 1). The sealed battery is placed for 24h, and the battery is charged by an external power supply 1.5A until gas is generated in the battery, so that the explosion-proof plug is compressed, and the gas flows out. And removing the external power supply, recovering the explosion-proof plug, wiping the battery without gas flowing out, and measuring the open-circuit voltage to be 1.723V after the battery is placed for 72h without loss of discharge capacity.
In comparison, the commercially available AA-sized alkaline zinc-manganese primary battery is charged by using an external power supply of 1.5V until a sealing ring safety valve is opened, the battery is cleaned, and the battery still leaks after being placed for 72 hours and can only be discarded.
Claims (9)
1. The utility model provides a sealing structure of cylinder type battery with paste Zn or ZnO as negative pole which characterized in that this structure comprises lower negative pole lid (2), explosion-proof plug (3), upper negative pole lid (4), sealing washer (5), steel cylinder (6) and copper nail (7), wherein lower negative pole lid (2) and copper nail (7) welding, lower negative pole lid (2) and upper negative pole lid (4) are connected, explosion-proof plug (3) are placed to the centre, copper nail (7) insert sealing washer (5) mesopore, lower negative pole lid (2) are fixed in sealing washer (5) upper portion along with the area simultaneously, copper nail (7) insert in battery negative pole calamine cream (9), simultaneously sealing washer (5) and steel cylinder (6) oral area closely cooperate, make sealing washer (5) footpath, axial receive the compression through at the rolling groove and turn-up on steel cylinder (6) upper portion, and make the battery sealed.
2. A sealing structure of a battery according to claim 1, wherein the lower negative electrode cap (2) has two symmetrical air holes (21) in the middle, and the gas generated in the battery can uniformly flow into the explosion-proof plug (3).
3. A sealing structure of a battery according to claim 1, wherein the explosion-proof plug (3) is trapezoidal in shape and elastic, and when the pressure becomes thinner, the pressure resistance of the explosion-proof plug can be adjusted by changing the thickness of the explosion-proof plug, and the pressure resistance of the explosion-proof plug can be controlled to be 2-8Mpa by adjusting the thickness of the explosion-proof plug according to the battery requirement.
4. The sealing structure of the battery according to claim 1, wherein the thickness of the upper negative cover (4) changes with the change of the thickness of the explosion-proof plug (3), the edge of the upper negative cover (2) is horizontally placed on the edge of the lower negative cover, the explosion-proof plug (3) is placed in the middle of the upper negative cover, the edge of the lower negative cover (2) is bent upwards and presses the edge of the upper negative cover (4), so that the upper negative cover and the lower negative cover are in good contact, and the assembled component is called a negative current collector, and the outer diameter of the assembled component is tightly combined with the inner diameter of the sealing surface of the sealing ring (5).
5. The sealing structure of the battery according to claim 1, wherein the copper nail (7) is made of brass H62-68, the surface of the copper nail is plated with In or Sn, the copper nail is shaped like an iron nail, the diameter of the nail rod is thick at the upper part and thin at the lower part, the diameter of the thick part at the upper part is In interference fit with the middle hole of the sealing ring (5), the copper nail platform is concave, and the welding head is arc-shaped.
6. The sealing structure of the battery according to claim 1, wherein the sealing ring (5) is made of polypropylene or nylon 66, the outer diameter of the sealing surface of the sealing ring (5) is tightly matched with the inner diameter of the opening of the steel cylinder (6), the inner diameter of the sealing surface is tightly matched with the outer diameter of the negative current collector, 2-3 air holes are formed, and the hole in the sealing ring (5) is in interference fit with the copper nail (7).
7. The sealing structure of the battery according to claim 1, wherein the steel cylinder (6) is made of 08F carbon steel plated with Ni, the thickness of the Ni plated layer is 2-4 μm on the outer layer, the thickness of the inner wall is 1-3 μm, the wall thickness of the steel cylinder is 0.2-0.35 mm, and the inner diameter of the opening part of the steel cylinder is tightly combined with the outer diameter of the sealing surface of the sealing ring (5).
8. A battery closure arrangement according to claim 1, wherein the sealing surface of the sealing ring (5) is hand reduced by 15-40% and axial compression by 20-50% by grooving and crimping the steel can.
9. The sealing structure of battery according to claim 1, wherein the sealing structure is suitable for cylindrical Zn-Ni battery using calamine cream as negative electrode, zn-MnO 2 Or Zn-Ag 2 And (4) an O battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031039022A CN1248326C (en) | 2003-01-30 | 2003-01-30 | cylindrical alkaline Zn battery sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031039022A CN1248326C (en) | 2003-01-30 | 2003-01-30 | cylindrical alkaline Zn battery sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1521871A CN1521871A (en) | 2004-08-18 |
| CN1248326C true CN1248326C (en) | 2006-03-29 |
Family
ID=34282112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031039022A Expired - Fee Related CN1248326C (en) | 2003-01-30 | 2003-01-30 | cylindrical alkaline Zn battery sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1248326C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104168B (en) * | 2011-01-28 | 2012-12-05 | 福建南平南孚电池有限公司 | Cylindrical lithium-iron disulfide battery and manufacture method thereof |
| CN108539088B (en) * | 2018-05-28 | 2024-05-28 | 浙江野马电池股份有限公司 | Sealing structure of alkaline manganese cell |
-
2003
- 2003-01-30 CN CNB031039022A patent/CN1248326C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1521871A (en) | 2004-08-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Highstar Battery Manufacturing Co., Ltd. Assignor: Jiangsu Haisida Group Co., Ltd. Contract fulfillment period: 2007.5.12 to 2010.12.30 contract change Contract record no.: 2008320000335 Denomination of invention: Cylindrical alkaline Zn battery closing arrangement Granted publication date: 20060329 License type: Exclusive license Record date: 2008.9.25 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.5.12 TO 2010.12.30 Name of requester: JIANGSU HAISIDA POWER CO., LTD. Effective date: 20080925 |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |