CN111916849A - Method for manufacturing lead-acid storage battery - Google Patents
Method for manufacturing lead-acid storage battery Download PDFInfo
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- CN111916849A CN111916849A CN202010818942.6A CN202010818942A CN111916849A CN 111916849 A CN111916849 A CN 111916849A CN 202010818942 A CN202010818942 A CN 202010818942A CN 111916849 A CN111916849 A CN 111916849A
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/06—Lead-acid accumulators
- H01M10/12—Construction or manufacture
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention relates to a method for manufacturing a storage battery, which comprises the following steps: step 1: adding a first-density sulfuric acid solution into a lead-acid storage battery, wherein the density of the first-density sulfuric acid solution is 1.04g/cm 3-1.28 g/cm 3; step 2, electrifying to complete formation; and 3, adding a second density sulfuric acid solution into the battery after the formation is finished, and blending, wherein the density of the second density sulfuric acid solution is 1.25-1.6 g/cm3, and the density of the second density sulfuric acid solution is greater than that of the first density sulfuric acid solution. The manufacturing method of the storage battery can not only ensure the service life of the battery, but also meet the capacity requirement, and can also improve the formation efficiency, save energy and provide greater convenience for producing batteries with different capacities.
Description
Technical Field
The invention relates to the field of lead-acid storage batteries.
Background
In the process of manufacturing the lead-acid storage battery, the process of forming the polar plate is required, and the internal formation methods widely adopted by the existing valve-regulated lead-acid storage battery (VRLAB) have the defects of low formation efficiency, long time, high energy consumption, short service life and the like.
The formation of the internal formation battery is completed under the condition of high H2SO4 concentration, although the battery capacity can meet the requirement, a large amount of HSO 4-ions are adsorbed in a gel region of PbO2 particles, SO that an active center of an electrochemical reduction reaction of PbO2 is blocked, and therefore, the electrode capacity is attenuated. Meanwhile, the skeleton structure of the positive active material is difficult to form under the condition of high-concentration sulfuric acid, so that the positive active material falls off and becomes sludge in circulation, and the service life of the battery is shortened. The conventional internal formation process also comprises a method of completing formation by adding low-density acid and then adding high-density acid, and although the capacity requirement after formation is also met, because the low-density formation battery is not completely formed, incomplete formation can be caused when high-density sulfuric acid is added for continuous formation, the service life of the battery can be influenced, and the formation efficiency can be influenced.
The conventional formation process is formed in a high-density acid environment, and the framework structure of the positive active material is difficult to form due to the over-strong acid environment. And the conventional formation process is in a rich liquid state, the saturation of the partition plate is too high, the water decomposition in the formation process is serious, and the energy consumption is high.
Because the conventional internal formation process has the defects, the development of the internal formation process for the battery with high capacity and long service life is a problem to be solved urgently in the industry of the lead-acid storage battery.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for manufacturing a storage battery, which comprises the following steps: step 1: adding a first-density sulfuric acid solution into a lead-acid storage battery, wherein the density of the first-density sulfuric acid solution is 1.04g/cm 3-1.28 g/cm 3; step 2, electrifying to complete formation; and 3, adding a second density sulfuric acid solution into the battery after the formation is finished, and blending, wherein the density of the second density sulfuric acid solution is 1.25-1.6 g/cm3, and the density of the second density sulfuric acid solution is greater than that of the first density sulfuric acid solution.
Further, the acid absorption amount of the separator of the lead-acid storage battery in the step 1 is in an unsaturated state.
Further, in the step 1, the adding of the first-density sulfuric acid solution is performed for multiple times, and the volume of the low-density sulfuric acid solution added at the next time is larger than that of the low-density sulfuric acid solution added at the previous time.
Further, in the step 3, the adding of the second density sulfuric acid solution is performed for multiple times, and the volume of the high density sulfuric acid solution added at the next time is smaller than that of the high density sulfuric acid solution added at the previous time.
After the formation of the battery is finished, the manufacturing method of the invention can ensure the service life of the battery and meet the requirement of capacity, in addition, the formation efficiency can be improved, the energy can be saved, and the invention provides more convenience for producing batteries with different capacities.
Drawings
FIG. 1 is a graph comparing the cycle life of examples 1 to 4 of the present invention with that of comparative example 1.
Detailed Description
The invention is further described with reference to specific examples.
The manufacturing method of the storage battery comprises the following steps: step 1, adding a sulfuric acid solution with a first density into a lead-acid storage battery to be formed, wherein the first density is preferably 1.04g/cm 3-1.28 g/cm3, and selecting a proper density sulfuric acid solution according to the requirements of field actual conditions on a production field, for example, adding a sulfuric acid solution with a density of 1.05-1.15 g/cm3 to obtain a battery with relatively high service life requirement and relatively low capacity requirement after formation is finished; the method comprises the steps of obtaining a battery with relatively low service life requirement and relatively high capacity requirement after formation is finished, adding 1.16-1.28 g/cm3 sulfuric acid solution, wherein the volume of the added sulfuric acid solution can be 70% -110%, preferably 70% -99% of the saturated acid absorption amount of a lead storage battery partition plate, and when the acid absorption amount in the formation process is lower than 100%, namely the acid absorption amount of the lead storage battery partition plate is in an unsaturated state, the battery enters a barren solution state, an oxygen composite channel is opened, and oxygen circulation starts, so that the formation efficiency can be greatly improved, water loss is reduced, electric energy is saved, the formation time is shortened, and the production efficiency is improved; step 2, electrifying to complete formation; in the formation process, the sulfuric acid solution with the first density is used as a medium to participate in the formation reaction, and after the formation is completed, namely after the basic lead sulfate and the lead oxide are converted, the battery with the formation completed has a longer service life; and 3, adding a sulfuric acid solution with a second density into the battery after the formation is finished, wherein the second density is preferably 1.25-1.6 g/cm3(25 ℃), because the capacity of the sulfuric acid solution with the first density after the formation is low, in order to achieve the required battery capacity, the density of the sulfuric acid solution with the second density is required to be higher than that of the sulfuric acid solution with the first density, and the sulfuric acid solution with the second density is used for mixing with the acid after the formation of the battery so as to be regulated into the actually required sulfuric acid with a specific concentration. And 4, finishing the formation, and extracting free acid if the battery saturation is higher than 100%. The first addition of the low-density sulfuric acid solution can be 1 time addition of the low-density sulfuric acid solution, or can be divided into a plurality of times of addition of the low-density sulfuric acid solution, and when the low-density sulfuric acid solution is added for a plurality of times, the volume of the low-density sulfuric acid solution added for the next time is preferably larger than that of the low-density sulfuric acid solution added for the previous time, so that the complete penetration efficiency is improved. The second addition of the high-density sulfuric acid solution can be 1 addition of the high-density sulfuric acid solution or multiple additions of the high-density sulfuric acid solution, and when the high-density sulfuric acid solution is added for multiple times, the volume of the high-density sulfuric acid solution added for the next time is preferably smaller than that of the high-density sulfuric acid solution added for the previous time, so that the accurate capacity can be obtained. Because the low-density formation of the invention is completely complete, namely the basic lead sulfate and the lead oxide are completely converted, the invention can reach good service life and can obtain the required capacity.
Example 1
The semi-finished product of the battery with 6-DZF-20 glue sealed off line is taken, the method is adopted for acid addition and formation, and the sample preparation process is as follows:
1) adding acid for the first time, adding a sulfuric acid solution with the density of 1.06g/cm3 into the lead storage battery to be added, wherein the acid volume is 140ml, the saturated acid absorption amount of a partition plate is about 82 percent, and adding acid by using a vacuum acid adding machine.
2) And (3) placing the battery subjected to the first acid adding in a water bath, connecting a charging wire clamp, starting a charger, and performing the process according to the process in the table 1.
TABLE 16-DZF-20 Process
| Step (ii) of | Means for | Current (A) | Time (h) | Electric quantity (Ah) |
| 1 | Charging of electricity | 0.4 | 0.5 | 0.2 |
| 2 | Charging of electricity | 0.8 | 0.5 | 0.4 |
| 3 | Charging of electricity | 1.6 | 0.5 | 0.8 |
| 4 | Charging of electricity | 3 | 0.5 | 1.5 |
| 5 | Charging of electricity | 3.5 | 0.875 | 3.0625 |
| 6 | Charging of electricity | 4 | 14 | 56 |
| 7 | Charging of electricity | 3 | 2.88 | 8.64 |
| 8 | Charging of electricity | 6.3 | 8.94 | 56.322 |
| 9 | Standing still | Standing for 1 |
1 | |
| 10 | Charging of electricity | 5.7 | 2.2 | 12.54 |
| 11 | Standing still | Standing for 1 |
1 | |
| 12 | Charging of electricity | 5.1 | 2.5 | 12.75 |
3) And (5) when the formation is finished and the charge amount reaches 126Ah, completely forming, namely finishing the conversion of the basic lead sulfate and the lead oxide.
4) And (3) adding the blending acid, adding the acid by using a vacuum acid adding machine, wherein the density of the blending acid is 1.60g/cm3, and after the addition of 68ml of the blending acid is finished, vacuumizing the battery once to ensure that the electrolyte enters the battery, and continuously operating according to the program in the table 1.
5) After the program operation is finished, continuously charging for 1.5-2 hours at the current of 0.55A, completely pumping out residual acid in a charging state, stopping the machine, taking the machine off the line, cleaning the battery, covering a safety valve rubber cap, and covering a cover plate to obtain a finished product battery.
Example 2
The semi-finished product of the battery with 6-DZF-20 glue sealed off line is taken, the method is adopted for acid addition and formation, and the sample preparation process is as follows:
1) adding acid for the first time, adding sulfuric acid solution with the density of 1.17g/cm3 into the lead storage battery to be added, adding the acid with the volume of 145ml and the acid absorption amount of about 86.34% of the saturated acid absorption amount of a partition plate, and adding the acid by using a vacuum acid adding machine.
2) And (3) placing the battery subjected to the first acid addition in a water bath, connecting a charging wire clamp, starting a charger, and performing the process according to the process 1 in the table.
3) And (5) when the formation is finished and the charging amount reaches 126Ah, the formation is finished, namely the basic lead sulfate and the lead oxide are converted.
4) And (3) adding the blending acid, adding the acid by using a vacuum acid adding machine, wherein the density of the blending acid is 1.55g/cm3, and after the addition of 50ml of the blending acid is finished, vacuumizing the battery once to ensure that the electrolyte enters the battery, and continuously operating according to the program in the table 1.
5) After the program operation is finished, continuously charging for 1.5-2 hours at the current of 0.55A, completely pumping out residual acid in a charging state, stopping the machine, taking the machine off the line, cleaning the battery, covering a safety valve rubber cap, and covering a cover plate to obtain a finished product battery.
Example 3
The semi-finished product of the battery with 6-DZF-20 glue sealed off line is taken, the method is adopted for acid addition and formation, and the sample preparation process is as follows:
1) adding acid for the first time, adding sulfuric acid solution with the density of 1.28g/cm3 into the lead storage battery to be added, wherein the acid volume is 155ml, the saturated acid absorption amount of a partition plate is about 95.4%, and adding acid by using a vacuum acid adding machine.
2) And (3) placing the battery subjected to the first acid adding in a water bath, connecting a charging wire clamp, starting a charger, and performing the process according to the process in the table 1.
3) And (5) when the formation is finished and the charging amount reaches 126Ah, the formation is finished, namely the basic lead sulfate and the lead oxide are converted.
4) And (3) adding the blending acid, adding the acid by using a vacuum acid adding machine, wherein the density of the blending acid is 1.28g/cm3, and after the addition of 35ml of the blending acid is finished, vacuumizing the battery once to ensure that the electrolyte enters the battery, and continuously operating according to the program in the table 1.
5) After the program operation is finished, continuously charging for 1.5-2 hours at the current of 0.55A, checking whether residual acid exists in each cell under the charging state, directly stopping the machine and taking off the line if the residual acid does not exist, cleaning the battery, covering a safety valve rubber cap, and covering a cover plate to obtain a finished product battery.
Comparative example 1
Taking a semi-finished product of the 6-DZF-20 rubber-sealed off-line battery, adding acid and forming according to a conventional production method, wherein the sample preparation process comprises the following steps:
1) adding sulfuric acid solution with the density of 1.26g/cm3 into a lead storage battery to be added with acid by adopting one-time acid adding, wherein the acid adding volume is 232ml, and adding acid by adopting a vacuum acid adding machine.
2) And (3) placing the battery after acid addition in a water bath, connecting a charging wire clamp, starting a charger, and forming according to the process shown in the table 2, wherein the battery is in a liquid-rich state in the whole forming process.
TABLE 26-DZF-20 Normal formation Process
3) After formation is finished, charging is continued for 1.5-2 hours at the current of 0.45A, residual acid is pumped out in a charging state, the machine is stopped, the battery is taken off line, the battery is cleaned, a safety valve rubber cap is covered, and a cover plate is covered to obtain a finished battery.
Example 5
Table 3 summarizes the time-consuming and formation results of the processes of examples 1 to 4 and comparative example 1
TABLE 3 comparison of formation efficiency of examples 1-4 with that of comparative example 1
As can be seen from the data in the above table, the PbO2 content in examples 1 to 4 is substantially the same as that in comparative example 1, which indicates that the conversion rate of the active material is the same, but the total electric quantity of formation and the total time of formation are obviously shorter than that in comparative example 1, which indicates that the formation efficiency is obviously improved by using the technology of the present invention. Meanwhile, the water loss of the examples 1-4 is obviously lower than that of the comparative example 1, which shows that the formation water loss rate of the technology is obviously better than that of the conventional process.
Example 6
The cycle life tests of the finished batteries of the embodiment 1-4 and the comparative example 1 were carried out according to 4 batteries/group.
The cycle life testing method comprises the following steps:
discharging: discharging 10A to 42V;
charging: when the constant voltage is 59.2V, the current is limited by 3.5A and the charging is carried out until the current is less than or equal to 0.5A, the constant voltage charging is changed to 55.2V for 3 hours;
and thirdly, circulating the first step and the second step until the capacity is lower than 70 percent of the rated capacity for three times, and counting the circulation times for the three times.
The test results are shown in fig. 1.
As can be seen from the data in FIG. 1, the cycle life of examples 1-4 using the technology of the present invention is significantly better than that of comparative example 1, and shows a significant rule, the higher the first formation acid density of examples 1-4, the shorter the life, but all better than that of comparative example.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (4)
1. A method for manufacturing a lead-acid battery, characterized by comprising the steps of: step 1: adding a first-density sulfuric acid solution into a lead-acid storage battery, wherein the density of the first-density sulfuric acid solution is 1.04g/cm 3-1.28 g/cm 3; step 2, electrifying to complete formation; and 3, adding a second density sulfuric acid solution into the battery after the formation is finished, and blending, wherein the density of the second density sulfuric acid solution is 1.25-1.6 g/cm3, and the density of the second density sulfuric acid solution is greater than that of the first density sulfuric acid solution.
2. The method for manufacturing a lead-acid storage battery according to claim 1, wherein the acid absorption of the separator of the lead-acid storage battery in the step 1 is in an unsaturated state.
3. The method for manufacturing a lead-acid storage battery according to claim 1 or 2, wherein in the step 1, the first-density sulfuric acid solution is added in multiple times, and the volume of the low-density sulfuric acid solution added in the latter time is larger than that of the low-density sulfuric acid solution added in the former time.
4. The method for manufacturing a lead-acid storage battery according to claim 3, wherein in the step 3, the second-density sulfuric acid solution is added in multiple times, and the volume of the high-density sulfuric acid solution added in the latter time is smaller than that of the high-density sulfuric acid solution added in the former time.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/073066 WO2021142853A1 (en) | 2020-01-19 | 2020-01-19 | Fabrication method for lead-acid storage battery |
| CNPCT/CN2020/073066 | 2020-01-19 | ||
| PCT/CN2020/073065 WO2021142852A1 (en) | 2020-01-19 | 2020-01-19 | Method for manufacturing lead-acid battery |
| CNPCT/CN2020/073065 | 2020-01-19 | ||
| CN2020103854428 | 2020-05-09 | ||
| CN202010385442 | 2020-05-09 |
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| CN111916849A true CN111916849A (en) | 2020-11-10 |
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| CN202010818942.6A Pending CN111916849A (en) | 2020-01-19 | 2020-08-14 | Method for manufacturing lead-acid storage battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113285183A (en) * | 2021-04-16 | 2021-08-20 | 安徽超威电源有限公司 | Acid charging method for prolonging cycle life of valve-regulated lead-acid storage battery for power |
| CN113394523A (en) * | 2021-05-21 | 2021-09-14 | 天能电池集团股份有限公司 | Acid adding and formation method for lead storage battery |
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| CN109148815A (en) * | 2018-07-18 | 2019-01-04 | 天能电池集团有限公司 | A kind of long-life lead storage battery acid adding chemical synthesizing method |
| CN110277528A (en) * | 2019-06-24 | 2019-09-24 | 骆驼集团襄阳蓄电池有限公司 | A kind of high temperature resistant, deeper cavity long-life type AGM start and stop lead-acid accumulator manufacturing method |
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2020
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| CN109148815A (en) * | 2018-07-18 | 2019-01-04 | 天能电池集团有限公司 | A kind of long-life lead storage battery acid adding chemical synthesizing method |
| CN110277528A (en) * | 2019-06-24 | 2019-09-24 | 骆驼集团襄阳蓄电池有限公司 | A kind of high temperature resistant, deeper cavity long-life type AGM start and stop lead-acid accumulator manufacturing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113285183A (en) * | 2021-04-16 | 2021-08-20 | 安徽超威电源有限公司 | Acid charging method for prolonging cycle life of valve-regulated lead-acid storage battery for power |
| CN113394523A (en) * | 2021-05-21 | 2021-09-14 | 天能电池集团股份有限公司 | Acid adding and formation method for lead storage battery |
| CN113394523B (en) * | 2021-05-21 | 2022-09-20 | 天能电池集团股份有限公司 | Acid adding and formation method for lead storage battery |
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