CN111710836B - Curing process for positive plate of lead-acid storage battery for electric automobile - Google Patents
Curing process for positive plate of lead-acid storage battery for electric automobile Download PDFInfo
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- CN111710836B CN111710836B CN202010587053.3A CN202010587053A CN111710836B CN 111710836 B CN111710836 B CN 111710836B CN 202010587053 A CN202010587053 A CN 202010587053A CN 111710836 B CN111710836 B CN 111710836B
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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
- H01M4/14—Electrodes for lead-acid accumulators
- H01M4/16—Processes of manufacture
- H01M4/20—Processes of manufacture of pasted electrodes
- H01M4/21—Drying of pasted electrodes
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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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- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a curing process of a lead-acid storage battery positive plate for an electric automobile, which comprises the following steps: firstly, placing an electrode plate into a steam tight curing chamber for steam tight for 0.4-0.6H at 97-99 ℃; step two, the directionThe stewing and solidifying chamber is filled with nitrogen N2Until the oxygen content is 0-8%, curing for 0.4-0.6H at 99-103 ℃; step three, using 2m3Filling nitrogen N into the steam tight solidification chamber at a uniform speed2Sealing and steaming, and curing for 1.3-1.7H at the temperature of 103-107 ℃; step four, stopping filling the nitrogen N2Continuously curing for 0.4-0.6H at the temperature of 90-94 ℃; step five, stopping the machine, and transferring the electrode plate to a common curing chamber within 15 min; sixthly, performing a nine-stage intermittent curing process and a five-stage drying process in a common curing chamber to obtain a cured polar plate; the interior of the lead paste of the pole plate generates a mixture of the cross-linked tribasic lead sulfate and tetrabasic lead sulfate under the anaerobic condition, thereby solving the problem of low battery cycle life caused by softening and loosening of the positive plate of the battery.
Description
Technical Field
The invention relates to a battery pole plate curing process, in particular to a curing process for a positive plate of a lead-acid storage battery for an electric automobile.
Background
In the early stage of battery plate solidification, the water content in lead paste is more than 9.0%, the inside of an active substance is most easily in a cross-linked structure in the state, the characteristic is fully utilized, the high-temperature and anaerobic (rare) state is adopted in the initial stage of solidification, the water content is fully ensured to be stable, the change of the internal components of the active substance caused by oxidation is reduced, the interlayer appears between a grid and the active substance due to the oxidation of the surface of the grid at the overhigh temperature, and the serious PCL effect appears. High-temperature curing is easy to form a cross-linking structure, and influences the strength of the polar plate and the performance of the battery.
Disclosure of Invention
The invention aims to solve the technical problem of providing a process for curing a positive plate of a lead-acid storage battery for an electric automobile, which can improve the strength of the positive plate and prolong the service life of the battery.
In order to solve the technical problems, the technical scheme of the invention is as follows: a curing process for a positive plate of a lead-acid storage battery for an electric automobile comprises the following steps:
firstly, placing an electrode plate into a steam tight curing chamber, and performing steam tight at 97-99 ℃ for 0.4-0.6H;
step two, quickly filling nitrogen N into the steam tight curing chamber2Until the oxygen content is 0-8%, curing for 0.4-0.6H at the temperature of 99-103 ℃;
step three, using 2m3Filling nitrogen N into the steam tight solidification chamber at a uniform speed2Continuously carrying out closed steaming, and curing for 1.3-1.7H at the temperature of 103-107 ℃;
step four, stopping filling the nitrogen N2Continuously curing for 0.4-0.6H at the temperature of 90-94 ℃;
step five, stopping the machine, and transferring the electrode plate to a common curing chamber within 15 min;
and step six, performing a nine-stage intermittent curing process and a five-stage drying process in a common curing chamber to obtain the cured polar plate.
As a preferable technical scheme, in the first step, steaming is carried out at 98 ℃ for 0.5H, the rotating speed of a circulating fan is 30 percent, and atomized water is 100 percent.
As a preferable technical scheme, in the second step, 0.5H is cured at the temperature of 101 ℃, the rotating speed of a circulating fan is 30 percent, and atomized water is 100 percent.
As a preferable technical scheme, in the third step, 1.5H is cured at 105 ℃, the rotating speed of a circulating fan is 45 percent, and atomized water is 100 percent.
As a preferable technical scheme, in the fourth step, 0.5H is cured at the temperature of 92 ℃, the rotating speed of a circulating fan is 55 percent, and atomized water is 100 percent.
As a preferable technical solution, in the sixth step, the nine-stage batch curing process includes the following steps:
curing for 5H under the conditions of 75 ℃ and 99% of humidity, wherein the rotating speed of a circulating fan is 35%, and the opening of an air inlet and the opening of an air outlet are both 0;
curing for 16H under the conditions of 75 ℃ and 99% of humidity, wherein the rotating speed of a circulating fan is 40%, and the opening of an air inlet and the opening of an air outlet are both 0;
curing the 3H at the temperature of 70 ℃ and the humidity of 95%, wherein the rotating speed of a circulating fan is 40%, and the opening of an air inlet and the opening of an air outlet are both 40%;
curing for 5H under the conditions that the temperature is 62 ℃ and the humidity is 90 percent, the rotating speed of a circulating fan is 50 percent, and the opening of an air inlet valve and the opening of an air outlet valve are both 50 percent;
step five, stopping heating and aerating, and enabling the curing chamber to be in a natural steaming static state for 0.25H;
step six, curing for 5H under the conditions that the temperature is 60 ℃ and the humidity is 85%, the rotating speed of a circulating fan is 50%, and the opening of an air inlet valve and the opening of an air outlet valve are both 50%;
step seven, stopping heating and aerating, and enabling the curing chamber to be in a natural steaming static state for 0.25H;
eighthly, curing for 5H under the conditions that the temperature is 58 ℃ and the humidity is 75%, the rotating speed of a circulating fan is 50%, and the opening of an air inlet and the opening of an air outlet are both 50%;
step nine, stopping heating and aerating, and enabling the curing chamber to be in a natural steaming static state for 0.5H; then entering the subsequent drying process.
As a preferred technical solution, in the sixth step, the five-stage drying process includes the following steps:
drying for 1H under the conditions that the temperature is 70 ℃ and the humidity is 30%, the rotating speed of a circulating fan is 100%, and the opening of an air inlet valve and the opening of an air outlet valve are both 50%;
step two, drying for 3H under the conditions that the temperature is 75 ℃ and the humidity is 10%, the rotating speed of a circulating fan is 100%, and the opening of an air inlet and the opening of an air outlet are both 80%;
drying for 6H under the conditions that the temperature is 78 ℃ and the humidity is 0, the rotating speed of a circulating fan is 100%, and the opening of an air inlet and the opening of an air outlet are both 100%;
drying for 2H under the conditions that the temperature is 70 ℃ and the humidity is 0, the rotating speed of a circulating fan is 100 percent, and the opening degree of an air inlet and the opening degree of an air outlet are both 100 percent;
and step five, drying for 0.5H under the conditions of the temperature of 30 ℃ and the humidity of 0, wherein the rotating speed of a circulating fan is 100%, and the opening of an air inlet and the opening of an air outlet are both 100%.
Due to the adoption of the technical scheme, the curing process for the positive plate of the lead-acid storage battery for the electric automobile comprises the following steps: in the first step of the method,putting the electrode plate into a steam tight curing chamber, and performing steam tight steaming at 97-99 ℃ for 0.4-0.6H; secondly, quickly filling nitrogen N2 into the steaming curing chamber until the oxygen content is 0-8%, and curing for 0.4-0.6H at the temperature of 99-103 ℃; step three, using 2m3Filling nitrogen N2 into the steam tight curing chamber at a uniform speed/H, continuing to perform closed steam tight, and curing for 1.3-1.7H at 103-107 ℃; stopping filling nitrogen N2, and continuously curing for 0.4-0.6H at the temperature of 90-94 ℃; step five, stopping the machine, and transferring the electrode plate to a common curing chamber within 15 min; sixthly, performing a nine-stage intermittent curing process and a five-stage drying process in a common curing chamber to obtain a cured polar plate; the interior of the lead paste of the pole plate generates a mixture of the cross-linked tribasic lead sulfate and tetrabasic lead sulfate under the condition of no oxygen (rare), thereby solving the problem of low battery cycle life caused by softening and loosening of the positive plate of the battery.
Detailed Description
The invention is further illustrated by the following examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention.
A curing process for a positive plate of a lead-acid storage battery for an electric automobile comprises the following steps:
firstly, placing an electrode plate into a steam tight curing chamber, and performing steam tight at 97-99 ℃ for 0.4-0.6H;
step two, quickly filling nitrogen N into the steam tight curing chamber2Until the oxygen content is 0-8%, curing for 0.4-0.6H at the temperature of 99-103 ℃;
step three, using 2m3Filling nitrogen N into the steam tight solidification chamber at a uniform speed2Continuously carrying out closed steaming, and curing for 1.3-1.7H at the temperature of 103-107 ℃;
step four, stopping filling the nitrogen N2Continuously curing for 0.4-0.6H at the temperature of 90-94 ℃;
step five, stopping the machine, and transferring the electrode plate to a common curing chamber within 15 min;
and step six, performing a nine-stage intermittent curing process and a five-stage drying process in a common curing chamber to obtain the cured polar plate.
Preferably, in the first step, steaming is carried out at 98 ℃ for 0.5H, the rotating speed of a circulating fan is 30 percent, and atomized water is 100 percent; in the second step, 0.5H is cured at 101 ℃, the rotating speed of a circulating fan is 30 percent, and atomized water is 100 percent; in the third step, 1.5H is cured at 105 ℃, the rotating speed of a circulating fan is 45 percent, and atomized water is 100 percent; in the fourth step, 0.5H is cured at the temperature of 92 ℃, the rotating speed of a circulating fan is 55 percent, and atomized water is 100 percent.
TABLE 1 parameters used for the one-to five-step steaming solidification Process
In the sixth step, the nine-stage batch curing process includes the following steps:
curing for 5H under the conditions of 75 ℃ and 99% of humidity, wherein the rotating speed of a circulating fan is 35%, and the opening of an air inlet and the opening of an air outlet are both 0;
curing for 16H under the conditions of 75 ℃ and 99% of humidity, wherein the rotating speed of a circulating fan is 40%, and the opening of an air inlet and the opening of an air outlet are both 0;
curing the 3H at the temperature of 70 ℃ and the humidity of 95%, wherein the rotating speed of a circulating fan is 40%, and the opening of an air inlet and the opening of an air outlet are both 40%;
curing for 5H under the conditions that the temperature is 62 ℃ and the humidity is 90 percent, the rotating speed of a circulating fan is 50 percent, and the opening of an air inlet valve and the opening of an air outlet valve are both 50 percent;
step five, stopping heating and aerating, and enabling the curing chamber to be in a natural steaming static state for 0.25H;
step six, curing for 5H under the conditions that the temperature is 60 ℃ and the humidity is 85%, the rotating speed of a circulating fan is 50%, and the opening of an air inlet valve and the opening of an air outlet valve are both 50%;
step seven, stopping heating and aerating, and enabling the curing chamber to be in a natural steaming static state for 0.25H;
eighthly, curing for 5H under the conditions that the temperature is 58 ℃ and the humidity is 75%, the rotating speed of a circulating fan is 50%, and the opening of an air inlet and the opening of an air outlet are both 50%;
step nine, stopping heating and aerating, and enabling the curing chamber to be in a natural steaming static state for 0.5H; then entering the subsequent drying process.
In the sixth step, the five-stage drying process comprises the following steps:
drying for 1H under the conditions that the temperature is 70 ℃ and the humidity is 30%, the rotating speed of a circulating fan is 100%, and the opening of an air inlet valve and the opening of an air outlet valve are both 50%;
step two, drying for 3H under the conditions that the temperature is 75 ℃ and the humidity is 10%, the rotating speed of a circulating fan is 100%, and the opening of an air inlet and the opening of an air outlet are both 80%;
drying for 6H under the conditions that the temperature is 78 ℃ and the humidity is 0, the rotating speed of a circulating fan is 100%, and the opening of an air inlet and the opening of an air outlet are both 100%;
drying for 2H under the conditions that the temperature is 70 ℃ and the humidity is 0, the rotating speed of a circulating fan is 100 percent, and the opening degree of an air inlet and the opening degree of an air outlet are both 100 percent;
and step five, drying for 0.5H under the conditions of the temperature of 30 ℃ and the humidity of 0, wherein the rotating speed of a circulating fan is 100%, and the opening of an air inlet and the opening of an air outlet are both 100%.
TABLE 2 parameters of the nine-stage batch curing procedure and the five-stage drying procedure in the sixth step
The E15A plate and 6-EVF-100 cell were used as examples, and the comparative data of the related plate and cell performance are shown in the following table:
TABLE 3 moisture and free lead content in green plates
TABLE 4 Pole plate Strength detection index
TABLE 5 Battery capacity of comparative batteries
TABLE 6 Battery Low temperature Performance of comparative batteries
TABLE 7 Battery cycling performance of comparative batteries
The curing process avoids the influence on the forming conditions of the mixture of tribasic lead sulfate and tetrabasic lead sulfate caused by the oxidation of active substances caused by oxygen, and has the following characteristics:
1. the active substances form a more stable cross-linking state at a high temperature of 102-105 ℃;
2. in the conventional curing process of the sixth step, a conventional intermittent steaming curing mode is adopted for 3 times, so that the combination of internal active substances is more reasonable, internal lead is further fully oxidized, and free lead of a green plate is more reasonable;
3. the strength of the plate is obviously improved;
4. the battery capacity and the low-temperature performance are both obviously improved;
5. the cycle life of the battery is prolonged by more than 80-100 times.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A curing process for a positive plate of a lead-acid storage battery for an electric automobile is characterized by comprising the following steps:
firstly, placing an electrode plate into a steam tight curing chamber, and performing steam tight at 97-99 ℃ for 0.4-0.6H;
step two, quickly filling nitrogen N into the steam tight curing chamber2Until the oxygen content is 0-8%, curing for 0.4-0.6H at the temperature of 99-103 ℃;
step three, using 2m3Filling nitrogen N into the steam tight solidification chamber at a uniform speed2Continuously carrying out closed steaming, and curing for 1.3-1.7H at the temperature of 103-107 ℃;
step four, stopping filling the nitrogen N2Continuously curing for 0.4-0.6H at the temperature of 90-94 ℃;
step five, stopping the machine, and transferring the electrode plate to a common curing chamber within 15 min;
and step six, performing a nine-stage intermittent curing process and a five-stage drying process in a common curing chamber to obtain the cured polar plate.
2. The curing process for the positive plate of the lead-acid storage battery for the electric automobile according to claim 1, wherein in the first step, steaming is carried out at 98 ℃ for 0.5H, the rotating speed of a circulating fan is 30 percent, and atomized water is 100 percent.
3. The curing process for the positive plate of the lead-acid storage battery for the electric automobile according to claim 1, wherein in the second step, 0.5H is cured at 101 ℃, the rotating speed of a circulating fan is 30% and atomized water is 100%.
4. The curing process of the positive plate of the lead-acid storage battery for the electric automobile according to claim 1, wherein in the third step, 1.5H is cured at 105 ℃, the rotating speed of a circulating fan is 45% and atomized water is 100%.
5. The curing process of the positive plate of the lead-acid storage battery for the electric automobile according to claim 1, wherein in the fourth step, 0.5H is cured at 92 ℃, the rotating speed of a circulating fan is 55% and atomized water is 100%.
6. The curing process for the positive plate of the lead-acid storage battery for the electric automobile according to claim 1, wherein in the sixth step, the nine-stage batch curing process comprises the following steps:
curing for 5H under the conditions of 75 ℃ and 99% of humidity, wherein the rotating speed of a circulating fan is 35%, and the opening of an air inlet and the opening of an air outlet are both 0;
curing for 16H under the conditions of 75 ℃ and 99% of humidity, wherein the rotating speed of a circulating fan is 40%, and the opening of an air inlet and the opening of an air outlet are both 0;
curing the 3H at the temperature of 70 ℃ and the humidity of 95%, wherein the rotating speed of a circulating fan is 40%, and the opening of an air inlet and the opening of an air outlet are both 40%;
curing for 5H under the conditions that the temperature is 62 ℃ and the humidity is 90 percent, the rotating speed of a circulating fan is 50 percent, and the opening of an air inlet valve and the opening of an air outlet valve are both 50 percent;
step five, stopping heating and aerating, and enabling the curing chamber to be in a natural steaming static state for 0.25H;
step six, curing for 5H under the conditions that the temperature is 60 ℃ and the humidity is 85%, the rotating speed of a circulating fan is 50%, and the opening of an air inlet valve and the opening of an air outlet valve are both 50%;
step seven, stopping heating and aerating, and enabling the curing chamber to be in a natural steaming static state for 0.25H;
eighthly, curing for 5H under the conditions that the temperature is 58 ℃ and the humidity is 75%, the rotating speed of a circulating fan is 50%, and the opening of an air inlet and the opening of an air outlet are both 50%;
step nine, stopping heating and aerating, and enabling the curing chamber to be in a natural steaming static state for 0.5H; then entering the subsequent drying process.
7. The curing process for the positive plate of the lead-acid storage battery for the electric automobile according to claim 1, wherein in the sixth step, the five-stage drying process comprises the following steps:
drying for 1H under the conditions that the temperature is 70 ℃ and the humidity is 30%, the rotating speed of a circulating fan is 100%, and the opening of an air inlet valve and the opening of an air outlet valve are both 50%;
step two, drying for 3H under the conditions that the temperature is 75 ℃ and the humidity is 10%, the rotating speed of a circulating fan is 100%, and the opening of an air inlet and the opening of an air outlet are both 80%;
drying for 6H under the conditions that the temperature is 78 ℃ and the humidity is 0, the rotating speed of a circulating fan is 100%, and the opening of an air inlet and the opening of an air outlet are both 100%;
drying for 2H under the conditions that the temperature is 70 ℃ and the humidity is 0, the rotating speed of a circulating fan is 100 percent, and the opening degree of an air inlet and the opening degree of an air outlet are both 100 percent;
and step five, drying for 0.5H under the conditions of the temperature of 30 ℃ and the humidity of 0, wherein the rotating speed of a circulating fan is 100%, and the opening of an air inlet and the opening of an air outlet are both 100%.
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CN101908622B (en) * | 2010-08-06 | 2012-06-27 | 天能电池集团有限公司 | Process for curing power lead-acid storage battery electrode plate |
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CN104600255B (en) * | 2014-12-30 | 2017-01-04 | 浙江天能动力能源有限公司 | A kind of curing process of polar plate of lead acid storage battery |
CN108232123B (en) * | 2017-12-26 | 2020-05-12 | 浙江天能动力能源有限公司 | Curing process for positive plate of lead-acid storage battery for electric automobile |
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CN109065846A (en) * | 2018-07-28 | 2018-12-21 | 河南超威电源有限公司 | Positive electrode plate of lead-acid battery curing process |
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