CN111463397A - Treatment method for preventing nickel-zinc battery cathode conversion nickel leading-out terminal from being corroded - Google Patents
Treatment method for preventing nickel-zinc battery cathode conversion nickel leading-out terminal from being corroded Download PDFInfo
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- CN111463397A CN111463397A CN202010190828.3A CN202010190828A CN111463397A CN 111463397 A CN111463397 A CN 111463397A CN 202010190828 A CN202010190828 A CN 202010190828A CN 111463397 A CN111463397 A CN 111463397A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/24—Electrodes for alkaline accumulators
- H01M4/26—Processes of manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
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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 treatment method for preventing a nickel-zinc battery cathode conversion nickel leading-out end from being corroded is characterized by comprising the following steps of: the method specifically comprises the following steps: (1) reserving a part of light mesh belt on a zinc cathode framework, namely, not coating active substances on the part needing to be welded; (2) and then welding a pure nickel metal leading-out piece on the reserved partial optical net belt, then uniformly coating an alkali-resistant high-temperature-resistant special curing adhesive on a welding point, namely covering the welding overlapping part of the pure nickel metal leading-out piece and the exposed metal copper sheet of the negative plate with the adhesive or fully covering the welding overlapping part with the adhesive, and performing electrolyte injection operation after the adhesive is completely cured. The pure nickel belt is adopted as a leading-out end to be welded with a negative copper current collector, the welding point is coated with special alkali-resistant and high-temperature-resistant curing glue, the corrosion of the zinc negative electrode is avoided due to the partition of the coating glue, and the gassing caused by the formation of a micro battery on the welding part is avoided, so that the nickel-zinc battery negative electrode nickel-conversion leading-out end with reduced battery performance is prevented from being corroded.
Description
Technical Field
The application relates to the technical field of nickel-zinc batteries, in particular to a treatment method for preventing a nickel-converted leading-out end of a negative electrode of a nickel-zinc battery from being corroded.
Background
The nickel-zinc battery is a secondary battery with higher charging efficiency, and has the advantages of high-current charging and discharging and excellent low-temperature performance. The service life of the zinc electrode is shortened due to corrosion and hydrogen evolution, and the self-discharge is the weak point of the nickel-zinc battery, so that the negative electrode framework and the current collector cannot use metal materials containing iron, nickel and the like, and only can use metals with higher electrode potential, such as gold, silver, copper, tin and the like. Gold and silver are expensive, tin is soft in texture, the melting point is too low, the tin is not suitable for being used as a current collector, a common zinc negative electrode uses a metal copper material as the current collector, but the melting point of copper is high, the copper and the copper are difficult to weld, and the welding position is easy to desolder after being corroded.
The prior art generally adopts a contact drainage mode, namely the elastic pressure of copper-tin alloy is utilized to contact a negative electrode framework, and nickel is converted after an alloy negative electrode is led out. However, since the contact is electrically conducted by using the elastic compression spring, the contact point is easily corroded, and the reliability is poor. In addition, because the nickel-converted part is not protected by a coating, the battery is easy to form an alkali climbing channel in the long-time storage process (the alkali climbing phenomenon is a main reason influencing the liquid leakage resistance and safety of the battery, and is extremely difficult to overcome at present, and the storage life and the service performance of the battery are seriously influenced once the alkali climbing phenomenon occurs), so that the potential danger of alkali climbing and liquid leakage at the negative electrode end of the battery is caused.
Disclosure of Invention
The utility model provides an above-mentioned not enough to prior art, provides one kind and adopts pure nickel strap to weld as leading-out end and negative pole copper mass flow body, coats alkali-resisting high temperature resistant special solidification glue at the welding point, owing to there is the wall of coating glue, has stopped the corruption of zinc negative pole, has avoided forming little battery and producing gassing at the welding part to the nickel zinc battery negative pole that avoids the battery performance to reduce changes the processing method that the nickel end was drawn out and is exempted from the corruption.
In order to solve the technical problem, the technical scheme adopted by the application is as follows: a treatment method for preventing a nickel-zinc battery cathode conversion nickel leading-out end from being corroded specifically comprises the following steps:
(1) reserving a part of light mesh belt on a zinc cathode framework, namely, not coating active substances on the part needing to be welded;
(2) then welding a pure nickel metal leading-out piece on the reserved partial optical net belt, then uniformly coating special alkali-resistant high-temperature-resistant curing glue on a welding point, namely covering or fully covering glue on a welding overlapping part (a current-collecting leading-out piece is a pole lug, and the corresponding curing glue is on a welding position, namely covering the welding position, namely firstly welding and then gluing for covering) of the pure nickel metal leading-out piece and the exposed metal copper sheet of the negative plate, and performing electrolyte injection operation after the glue is completely cured.
Preferably, the pure nickel metal lead-out sheet is finally led out to a position which is not in contact with the electrolyte; namely, the length after being led out can not be directly contacted with the electrolyte. This lead-out manner and the no swell act as a bridge between the inside (i.e., the portion having the electrolyte) and the outside (lead-out end) of the negative electrode sheet.
Preferably, the covering is to cover the curing adhesive around the periphery of the welding overlapping position, and the periphery gap of the pure nickel metal lead-out sheet and the bare metal copper sheet of the negative plate after welding and overlapping is covered with the curing adhesive; the full covering is that the gaps at the periphery and the welding overlapping positions of the pure nickel metal leading-out sheet and the bare metal copper sheet of the negative plate are covered with curing glue after being welded and overlapped.
Preferably, the zinc negative electrode framework is a polar plate body, a section of optical mesh belt (exposed copper edge) is arranged at a position of the polar plate body close to a pole lug, a pure nickel metal leading-out piece is welded on the optical mesh belt, the welding overlapping position of the pure nickel metal leading-out piece and the optical mesh belt and the periphery of the overlapping position are coated with alkali-resistant and high-temperature-resistant special curing glue, or the periphery of the welding overlapping position of the pure nickel metal leading-out piece and the optical mesh belt is coated with the alkali-resistant and high-temperature-resistant special curing glue.
Preferably, the optical mesh belt is positioned at one end of the polar plate body welded with the pure nickel metal leading-out sheet, the width of the optical mesh belt is not less than the width of the welding overlapping part of the pure nickel metal leading-out sheet and the optical mesh belt, and the length of the optical mesh belt is equal to the width of the polar plate body; by adopting the structure, the pure nickel metal leading-out piece can be fully welded with the optical mesh belt, and meanwhile, the curing adhesive can be fully bonded with the welding part.
Further preferably, the periphery of the special curing adhesive coated with the alkali-resistant and high-temperature-resistant adhesive is as follows: the periphery of three sides of the pure nickel metal leading-out piece, which are attached to the optical net belt, and the position, which extends from the upper edge of the pure nickel metal leading-out piece, which is overlapped with the polar plate. The structure is used for coating the curing adhesive in all directions at the welding superposition position, so that the occurrence of corrosion of a welding spot of the negative electrode is effectively ensured.
The invention has the advantages and beneficial effects that:
1. the method can effectively prevent the corrosion of the welding spot of the cathode and block the alkali-climbing channel.
2. The method can avoid the increase of the internal resistance of the battery caused by poor contact, and improve the safety and reliability of the battery
3. According to the method, the use of the elastic compression spring is omitted, and the elastic compression spring is used in a contact conduction mode, so that a contact point is easy to corrode, and the reliability is poor. The metal welding of the application is the connection by melting together at high temperature, so that the metal welding is not corroded and has good reliability. Such customized components reduce material costs.
Drawings
Fig. 1 is a graph comparing a battery prepared by the process of the present application with a conventional battery.
Fig. 2 is a schematic structural diagram of a negative electrode of a nickel-zinc battery of the present application.
FIG. 3 is a schematic structural view of the periphery of the welding portion covered with the curing adhesive.
FIG. 4 is a schematic structural diagram of a welding position of the present application, which is coated with a curing adhesive in a full-covering manner (the thickness of the curing adhesive is smaller than that of a nickel sheet).
FIG. 5 is a schematic structural diagram of a welding position of the present application, which is coated with a curing adhesive in a full-covering manner (the thickness of the curing adhesive is greater than that of a nickel sheet). As shown in the figure: 1. the method comprises the steps of a polar plate body, 2, a smooth mesh belt (exposed copper smooth edge), 3, a pure nickel metal lead-out sheet, 4, curing glue and 5, welding and overlapping positions.
Detailed Description
The present invention will be described in further detail below by way of examples, but the present invention is not limited to only the following examples.
The application discloses a specific structure that nickel is transferred to nickel of nickel-zinc battery negative pole and is drawn forth end and avoid corroding, as shown in fig. 2-5: the structure comprises a zinc negative pole framework, wherein the zinc negative pole framework is a pole plate body 1, a section of smooth mesh belt 2 (exposed copper smooth edge) is arranged at the position, close to a pole lug, of the pole plate body, a pure nickel metal leading-out piece 3 is welded on the smooth mesh belt, special curing glue 4 (shown in attached figures 2 and 4) with alkali resistance and high temperature resistance is coated on the welding overlapping position 5 of the pure nickel metal leading-out piece 3 and the smooth mesh belt 2 and the periphery of the overlapping position, or special curing glue 4 (shown in attached figures 2 and 3, namely the special curing glue 4 with alkali resistance and high temperature resistance is coated on the periphery of the welding overlapping position of the pure nickel metal leading-out piece and the smooth mesh belt); the position of the curing glue coated on the back side opposite to the front side of the drawing, which is indicated by the dotted line in fig. 2, can be understood by referring to fig. 3 and 4 (for clarity, the position of the welding overlap is omitted, and does not indicate that the curing glue can not be covered, and the scheme of the application covers the curing glue here).
As shown in fig. 2, the optical mesh belt is located at one end of the polar plate body where the pure nickel metal lead-out piece is welded, and the width of the optical mesh belt is not less than the width of the welding overlapping portion of the pure nickel metal lead-out piece and the optical mesh belt (i.e. the welding overlapping position is not greater than the width of the optical mesh belt, so as to ensure the welding firmness and conductivity), and the length of the optical mesh belt is equal to the width of the polar plate body; from this figure, it can be seen that the coating boundary of the curing glue on the plate body does not exceed the width of the optical mesh belt, and the embodiment is flush with the boundary of the optical mesh belt; by adopting the structure, the pure nickel metal leading-out piece can be fully welded with the optical mesh belt, and meanwhile, the curing adhesive can be fully bonded with the welding part.
As shown in figures 3, 4 and 5: the peripheries of the three sides of the pure nickel metal leading-out piece, which are attached to the optical net belt, and the positions of the pure nickel metal leading-out piece, which extend from the upper edge of the polar plate, are coated with the special curing glue with alkali resistance and high temperature resistance. The structure is used for coating the curing adhesive in all directions at the welding superposition position, so that the occurrence of corrosion of a welding spot of the negative electrode is effectively ensured.
The specific structure of the full coverage can be divided into the structure shown in fig. 4 and the structure shown in fig. 5, and the difference is the thickness of the curing glue; the full coverage is that the periphery of the welding overlapping position 5 and the welding overlapping position 5 are covered with the curing glue. The curing glue can be any commercially available waterproof and high-temperature-resistant curing glue, such as organic silicon glue, phenolic resin glue, urea-formaldehyde resin glue, temperature-resistant epoxy glue, polyimide glue and the like; or the high-temperature resistant inorganic adhesive can resist the temperature of 1800 ℃ and can be used in fire for a long time, thereby breaking the worldwide technical problem that the high-temperature resistant adhesive only resists the temperature below 1300 ℃.
Example specific operational procedures
A treatment method for preventing a nickel-zinc battery cathode conversion nickel leading-out end from being corroded specifically comprises the following steps:
(1) reserving a part of light mesh belt on a zinc cathode framework, namely, not coating active substances on the part needing to be welded;
(2) then welding pure nickel metal leading-out pieces on the reserved partial optical net belts, then uniformly coating alkali-resistant high-temperature-resistant special curing glue on the welding points, covering or fully covering the overlapping parts of the pole lugs and the current-collecting leading-out pieces contacted with the electrolyte with the glue, and after the glue is completely cured, carrying out electrolyte injection operation. The covering is to cover curing glue around the welding overlapping position and the gaps around the pure nickel metal leading-out piece and the exposed metal copper piece of the negative plate after welding and overlapping, and the overall covering is to cover curing glue on the gaps around the pure nickel metal leading-out piece and the exposed metal copper piece of the negative plate after welding and overlapping and the welding overlapping position.
The battery obtained after the above treatment has a significant difference from the conventional battery in the use process, and specifically, reference can be made to fig. 1: the left side of the battery is a conventional battery without curing adhesive, the alkali climbing phenomenon is obviously generated, a layer of hairy surface skin is formed on the surface of the battery due to the corrosion of the alkali climbing, and the corrosion alkali climbing phenomenon is obvious; wherein the right side is this application and glues the battery of handling through curing, does not have under the equal service condition and climbs the alkali phenomenon and appear, and the battery outward appearance of this application is smooth, clean bright, does not have any corrosion damage.
Capacity of nickel zinc battery prepared in this example: compared with the traditional coating process without the nickel conversion, the battery capacity is improved by 1 grade, the discharge time is increased by 5-10min, and the battery activation is more complete; internal resistance: compared with the traditional nickel-conversion coating process, the internal resistance of the battery is reduced by 0.5-0.8m omega; liquid leakage and alkali climbing rejection rate: the liquid leakage and alkali climbing proportion of the battery detection procedure produced by the traditional process without coating the curing adhesive is 0.2-0.8%, the application is below 0.02%, and the rejection rate of the battery core is obviously reduced; detection working hours: the detection time of the traditional process is generally 6-8 days, and the detection time required by the method is only 3-4 days, so that the equipment utilization rate and the production efficiency are greatly improved; cycle life: after the test is cycled for 500 times, the battery capacity is still kept above 90%.
Therefore, according to the process and the detection test data, the nickel-zinc battery prepared by the method adopts the pure nickel strip as the leading-out end to be welded with the negative copper current collector, the welding point is coated with the special alkali-resistant and high-temperature-resistant curing adhesive, the corrosion of the zinc negative electrode is avoided due to the partition of the coating adhesive, the gas evolution caused by the formation of the micro battery on the welding part is avoided, the performance reduction of the battery is avoided, and the performances of the internal resistance, the discharge time, the battery capacity and the like of the battery are all well improved.
Claims (6)
1. A treatment method for preventing a nickel-zinc battery cathode conversion nickel leading-out end from being corroded is characterized by comprising the following steps of: the method specifically comprises the following steps:
(1) reserving a part of light mesh belt on a zinc cathode framework, namely, not coating active substances on the part needing to be welded;
(2) and then welding a pure nickel metal leading-out piece on the reserved partial optical net belt, then uniformly coating an alkali-resistant high-temperature-resistant special curing adhesive on a welding point, namely covering the welding overlapping part of the pure nickel metal leading-out piece and the exposed metal copper sheet of the negative plate with the adhesive or fully covering the welding overlapping part with the adhesive, and performing electrolyte injection operation after the adhesive is completely cured.
2. The treatment method for preventing the nickel-converted leading-out end of the negative electrode of the nickel-zinc battery from being corroded as claimed in claim 1, wherein the treatment method comprises the following steps: and the pure nickel metal lead-out sheet is finally led out to a position which is not in contact with the electrolyte.
3. The treatment method for preventing the nickel-converted leading-out end of the negative electrode of the nickel-zinc battery from being corroded as claimed in claim 1, wherein the treatment method comprises the following steps: the periphery of the welding overlapping position is surrounded, and curing glue is covered in the peripheral gap after the pure nickel metal leading-out piece and the cathode piece bare metal copper sheet are welded and overlapped; the full covering is that the curing glue is covered on the welding overlapping position and the gaps at the periphery after the pure nickel metal leading-out piece and the cathode piece bare metal copper sheet are welded and overlapped.
4. The treatment method for preventing the nickel-converted leading-out end of the negative electrode of the nickel-zinc battery from being corroded as claimed in claim 1, wherein the treatment method comprises the following steps: the zinc negative pole framework is a pole plate body, a section of optical mesh belt is arranged at the position, close to a pole lug, of the pole plate body, a pure nickel metal leading-out piece is welded on the optical mesh belt, the pure nickel metal leading-out piece and the optical mesh belt are in a welding overlapping position, the periphery of the overlapping position is coated with alkali-resistant and high-temperature-resistant special curing glue, or the periphery of the welding overlapping position of the pure nickel metal leading-out piece and the optical mesh belt is coated with the alkali-resistant and high-temperature-resistant special curing glue.
5. The treatment method for preventing the nickel-converted leading-out end of the negative electrode of the nickel-zinc battery from being corroded as claimed in claim 4, wherein the treatment method comprises the following steps: the optical mesh belt is positioned at one end of the polar plate body welded with the pure nickel metal leading-out sheet, the width of the optical mesh belt is not less than the width of the pure nickel metal leading-out sheet and the optical mesh belt which are welded and overlapped, and the length of the optical mesh belt is equal to the width of the polar plate body.
6. The treatment method for preventing the nickel-converted leading-out end of the negative electrode of the nickel-zinc battery from being corroded as claimed in claim 4, wherein the treatment method comprises the following steps: the peripheries of the three sides of the pure nickel metal leading-out piece, which are attached to the optical net belt, and the positions of the pure nickel metal leading-out piece, which extend from the upper edge of the polar plate, are coated with the special curing glue with alkali resistance and high temperature resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010190828.3A CN111463397A (en) | 2020-03-18 | 2020-03-18 | Treatment method for preventing nickel-zinc battery cathode conversion nickel leading-out terminal from being corroded |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010190828.3A CN111463397A (en) | 2020-03-18 | 2020-03-18 | Treatment method for preventing nickel-zinc battery cathode conversion nickel leading-out terminal from being corroded |
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| CN111463397A true CN111463397A (en) | 2020-07-28 |
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| CN202010190828.3A Pending CN111463397A (en) | 2020-03-18 | 2020-03-18 | Treatment method for preventing nickel-zinc battery cathode conversion nickel leading-out terminal from being corroded |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0028879A2 (en) * | 1979-10-30 | 1981-05-20 | General Motors Corporation | Zinc electrodes for nickel-zinc accumulators |
| CN101202357A (en) * | 2006-12-15 | 2008-06-18 | 中国电子科技集团公司第十八研究所 | Cylinder type zinc-nickel storage battery |
| US20090233159A1 (en) * | 2005-04-26 | 2009-09-17 | Powergenix Systems, Inc. | Cylindrical nickel-zinc cell with negative can |
| CN201556677U (en) * | 2009-06-15 | 2010-08-18 | 广东博特动力能源有限公司 | Nickel-zinc cell |
| CN102664242A (en) * | 2012-05-17 | 2012-09-12 | 吉林卓尔科技股份有限公司 | Nickel-zinc secondary seal cylindrical alkaline battery with shell as cathode and manufacturing method for nickel-zinc secondary seal cylindrical alkaline battery |
| CN202521913U (en) * | 2012-03-14 | 2012-11-07 | 甘国工 | Solar collector core with anti-micro battery corrosion protection structure |
| CN106654139A (en) * | 2017-01-03 | 2017-05-10 | 曙鹏科技（深圳）有限公司 | Tab and electrode piece adapter coupling structure, battery cell and manufacturing method thereof |
-
2020
- 2020-03-18 CN CN202010190828.3A patent/CN111463397A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0028879A2 (en) * | 1979-10-30 | 1981-05-20 | General Motors Corporation | Zinc electrodes for nickel-zinc accumulators |
| US20090233159A1 (en) * | 2005-04-26 | 2009-09-17 | Powergenix Systems, Inc. | Cylindrical nickel-zinc cell with negative can |
| CN101202357A (en) * | 2006-12-15 | 2008-06-18 | 中国电子科技集团公司第十八研究所 | Cylinder type zinc-nickel storage battery |
| CN201556677U (en) * | 2009-06-15 | 2010-08-18 | 广东博特动力能源有限公司 | Nickel-zinc cell |
| CN202521913U (en) * | 2012-03-14 | 2012-11-07 | 甘国工 | Solar collector core with anti-micro battery corrosion protection structure |
| CN102664242A (en) * | 2012-05-17 | 2012-09-12 | 吉林卓尔科技股份有限公司 | Nickel-zinc secondary seal cylindrical alkaline battery with shell as cathode and manufacturing method for nickel-zinc secondary seal cylindrical alkaline battery |
| CN106654139A (en) * | 2017-01-03 | 2017-05-10 | 曙鹏科技（深圳）有限公司 | Tab and electrode piece adapter coupling structure, battery cell and manufacturing method thereof |
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Application publication date: 20200728 |
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