Rapid curing method for polar plate of lead-acid power storage battery

Abstract

The invention discloses a rapid curing method for a polar plate of a lead-acid power storage battery. The rapid curing method comprises the following steps: feeding the polar plate for less than or equal to 3h; steam is introduced, specifically, steam is introduced into the curing chamber for heating and humidifying, and the time at the temperature of 80 DEG C or above is controlled to be 50-80 min; curing: controlling the humidity to be greater than or equal to 75% and the temperature to be 50-60 DEG The pressure of circulating air is 3 mbar to 6 mbar, and the time is 4.5 h to 5 h; drying conversion: controlling the humidity to be 35-85% and the temperature to be 65-75 DEG C; the pressure of circulating air is 5 mbar to 8 mbar, and the time is 55 min to 65 min; drying: controlling the humidity to be 0-35% and the temperature to be 105-110 DEG C; the pressure of the circulating air is 5 mbar to 8 mbar, and the time is 45 min to 60 min. According to the invention, the circulating air pressure is controlled to supplement oxygen after steam heating and humidifying, and the moisture discharge is controlled, so that the oxidation speed of free lead of the polar plate is accelerated, the time of the curing stage is greatly shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of lead-acid batteries, in particular to a method for quickly curing a lead-acid power battery plate. Background Art

[0002] Plate curing is a key process in battery production, including the following reaction processes: active material recrystallization to form tribasic lead sulfate (3BS) or tetrabasic lead sulfate (4BS) network structure, grid surface oxidation and close contact with active material, free lead content in active material reduced after oxidation, and water loss and drying in active material. The free lead oxidation reduction stage is particularly important, which depends on temperature and oxygen supplementation amount and method.

[0003] Since the conditions during the curing of the plate will have a significant impact on each reaction process, thereby affecting the final battery performance, the existing technology has strict requirements on the conditions of the plate curing process, and usually the curing process time needs to be more than 60 hours, which seriously restricts production efficiency.

[0004] At present, there have been many studies on shortening the curing time of the plate, but most of the shortened curing time is still more than ten or twenty hours. Patent CN107342396B discloses a rapid curing process for battery plates, which can complete the curing and drying of the plate within 6 to 10 hours, greatly improving the production efficiency of curing and drying of the green plate. However, it discloses a rapid curing process for high-temperature 4BS lead paste, which is only applicable to automotive starter batteries or VRLA batteries. It is not applicable to power battery plates that cannot produce 4BS and require medium and low temperature curing. At present, the curing of power battery plates cannot be effectively shortened to improve production efficiency while ensuring the performance of the plate. Summary of the invention

[0005] The present invention aims to overcome the above-mentioned problems existing in the curing process of lead-acid power battery plates in the prior art, and provides a method for rapid curing of lead-acid power battery plates. After steam heating and humidification, the circulating wind pressure is controlled to supplement oxygen, the moisture emission is controlled, the oxidation rate of free lead in the plate is accelerated, the time of the curing stage is greatly shortened, and the production efficiency is improved.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A method for rapidly curing a lead-acid power battery plate comprises the following steps: (1) Plate loading stage: The plates to be cured are loaded into the curing chamber for a period of ≤ 3 hours; (2) Steaming stage: Steam at 100°C to 120°C is passed into the curing chamber for heating and humidification, so that the humidity reaches 100%, the temperature reaches 80°C to 100°C, and the time above 80°C is controlled within 50min to 80min; (3) Curing stage: control relative humidity ≥ 75%, temperature 50℃~60℃; supply fresh air, turn on the circulating fan, circulating air pressure 3mba~6mbar, time 4.5h~5h; (4) Drying and conversion stage: control the relative humidity to 35% to 85%, the temperature to 65°C to 75°C; supply fresh air, turn on the circulating fan, the circulating air pressure to 5mbar to 8mbar, and the time to 55min to 65min; (5) Drying stage: control relative humidity at 0% to 35% and temperature at 105°C to 110°C; supply fresh air, turn on the circulating fan, the circulating air pressure at 5mbar to 8mbar, and the drying time at 45min to 60min.

[0007] In the traditional plate curing process, the curing stage generally requires humidification by steam and atomized water. In the steam-passing stage, after the plate is heated and humidified by steam, the present invention only controls the moisture emission in the curing stage without humidification, reasonably controls the humidity range in the curing room, and supplements oxygen by pressure circulation. The wind pressure controls the oxygen supplementation speed in the curing stage and the water loss speed in the drying stage, accelerates the oxidation speed of the free lead in the plate, greatly shortens the time of the curing stage, and can shorten the overall curing time from more than 60 hours to 8 hours. While ensuring the cycle performance of the plate, the production efficiency is greatly improved.

[0008] Since high temperature curing (above 80°C) will produce 4BS, uneven 4BS will affect the capacity and battery consistency, and power batteries cannot have 4BS. Therefore, the present invention adopts a medium and low temperature curing method, the temperature in the curing stage does not exceed 80°C, and the curing process does not produce 4BS, which is suitable for the rapid curing of lead-acid power battery plates.

[0009] Preferably, the lead paste formula of the plate to be cured includes, by weight: 70 to 82 parts of lead powder, 3 to 5 parts of red lead, 6 to 7 parts of water, 6.5 to 8.0 parts of dilute sulfuric acid, and 0.06 to 0.07 parts of fiber. No 4BS is added to the lead paste formula of the present invention, and no 4BS is generated during the curing process, and the lead paste can be applied to lead-acid power batteries.

[0010] Preferably, the electrode plate described in step (1) is a punched grid plate or a continuously cast grid plate with a thickness of less than 2.6 mm.

[0011] Preferably, after the plates are loaded in step (1), the plates are stacked sideways or vertically on the curing rack in the curing chamber. The stacked sideways or vertically arranged plates can allow the oxygen supply airflow in the curing chamber to flow smoothly and evenly through the plates, which is conducive to uniform curing of the plates and ensures that the cured plates have excellent performance.

[0012] Preferably, in step (1), the plate is placed at 38°C to 42°C and relative humidity ≥ 98%.

[0013] Preferably, in step (1), steam at 100° C. to 120° C. is passed for humidification, and the steam volume is ≤ 15% of the maximum steam volume.

[0014] Preferably, the amount of steam introduced in step (2) is 60% to 100% of the maximum steam amount.

[0015] Preferably, in steps (3) to (5), the humidity is controlled by controlling the opening of the dehumidification damper of the curing chamber.

[0016] Preferably, the dehumidification damper opening in step (3) is 5% to 35%, the dehumidification damper opening in step (4) is 5% to 25%, and the dehumidification damper opening in step (5) is 10% to 100%.

[0017] Preferably, in steps (3) to (5), fresh air is replenished by controlling the opening of the fresh air inlet of the curing chamber, and the opening of the fresh air inlet is 100%.

[0018] Therefore, the present invention has the following beneficial effects: (1) After steam heating and humidification, the circulating wind pressure is controlled to supplement oxygen and control the amount of moisture discharged, which accelerates the oxidation rate of free lead in the plate and greatly shortens the curing stage. The entire curing time is shortened from 60 hours to 8 hours; (2) Using a medium to low temperature curing method, the lead paste formula does not contain 4BS, and the curing process does not produce 4BS, which is suitable for the rapid curing of power battery plates. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with specific implementation methods.

[0020] In the present invention, unless otherwise specified, all equipment and raw materials can be purchased from the market or are commonly used in the industry. The methods in the following embodiments, unless otherwise specified, are conventional methods in the art.

[0021] Overall embodiment: A method for rapidly curing a lead-acid power battery plate comprises the following steps: (1) Plate loading stage: The plates to be cured are loaded into the curing chamber for a period of ≤ 3 hours; (2) Steaming stage: Steam at 100°C to 120°C is passed into the curing chamber for heating and humidification, so that the humidity reaches 100%, the temperature reaches 80°C to 100°C, and the time above 80°C is controlled within 50min to 80min; (3) Curing stage: control relative humidity ≥ 75%, temperature 50℃~60℃; supply fresh air, turn on the circulating fan, circulating air pressure 3mba~6mbar, time 4.5h~5h; (4) Drying and conversion stage: control the relative humidity to 35% to 85% and the temperature to 65°C to 75°C; supply fresh air, turn on the circulating fan, the circulating air pressure is 5mbar to 8mbar, and the time is 55min to 65min; (5) Drying stage: control relative humidity at 0% to 35% and temperature at 105°C to 110°C; supply fresh air, turn on the circulating fan, the circulating air pressure at 5mbar to 8mbar, and the drying time at 45min to 60min.

[0022] As a specific implementation, the lead paste formula of the plate to be cured includes, by weight: 70 to 82 parts of lead powder, 3 to 5 parts of red lead, 6 to 7 parts of water, 6.5 to 8.0 parts of dilute sulfuric acid, and 0.06 to 0.07 parts of fiber; preferably, 4 to 5 parts of solid additives are also included. No 4BS is added to the lead paste formula of the present invention, and no 4BS is generated during the curing process, and it can be applied to lead-acid power batteries.

[0023] As a specific implementation, the electrode plate described in step (1) is a punched grid plate or a continuously cast grid plate with a thickness of less than 2.6 mm.

[0024] As a specific implementation, after the plates are loaded in step (1), the plates are stacked sideways or vertically on the curing rack in the curing chamber. The stacked sideways or vertically arranged plates can make the oxygen supply airflow in the curing chamber flow smoothly and evenly through the plates, which is conducive to the uniform curing of the plates and ensures that the cured plates have excellent performance.

[0025] As a specific implementation, the curing chamber in step (1) adopts the curing chamber in patent CN202210347857.5, and the curing rack in the curing chamber adopts the curing rack in patent CN202220374695.X.

[0026] As a specific implementation, in step (1), the plate is introduced at 38° C. to 42° C. and relative humidity ≥ 98%.

[0027] As a specific implementation, in step (1), steam at 100° C. to 120° C. is passed for humidification, and the amount of steam is ≤ 15% of the total amount of steam.

[0028] As a specific implementation, the amount of steam introduced in step (2) is 60% to 100% of the total steam amount.

[0029] As a specific implementation, in steps (3) to (5), the humidity is controlled by controlling the opening of the dehumidification damper of the curing chamber.

[0030] As a specific implementation, the dehumidification damper opening in step (3) is 5% to 35%, the dehumidification damper opening in step (4) is 5% to 25%, and the dehumidification damper opening in step (5) is 10% to 100%.

[0031] As a specific implementation manner, in steps (3) to (5), fresh air is replenished by controlling the opening of the fresh air replenishment port in the curing chamber, and the opening of the fresh air replenishment port is 100%.

[0032] Embodiment 1: A method for rapidly curing a lead-acid power battery plate comprises the following steps: (1) Plate feeding stage: the plates to be cured are fed into the curing chamber at a temperature of 40°C and a humidity of 100% for 1 hour; the plates to be cured are grid plates with a thickness of 2.3 mm, and the plates are stacked and placed sideways in the curing chamber; the lead paste formula of the plates to be cured includes, by weight, 80 parts of lead powder, 4 parts of red lead, 6 parts of water, 7 parts of dilute sulfuric acid, 0.06 parts of fiber, and 4 parts of graphite; (2) Steaming stage: 100°C steam is passed through the plates in the curing chamber to heat and humidify them, so that the humidity reaches 100% and the temperature reaches 80°C to 100°C. The time above 80°C is controlled within 60 minutes. (3) Curing stage: control humidity ≥ 75% and temperature 55°C by opening the dehumidification damper at 5% to 35%; open the fresh air inlet at 100%, start the circulating fan, and set the circulating air pressure to 5 mbar for 5 hours; (4) Drying conversion stage: the humidity is controlled at 35% to 85% and the temperature is 70°C by opening the dehumidification damper at 5 to 25%; the fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 7 mbar for 60 minutes; (5) Drying stage: The humidity is controlled at 0% to 35% and the temperature is 110°C by opening the dehumidification damper at 10% to 100%; the fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 7 mbar for 45 minutes.

[0033] Embodiment 2: A method for rapidly curing a lead-acid power battery plate comprises the following steps: (1) Plate loading stage: the plates to be cured are loaded into the curing chamber at a temperature of 38°C and a humidity of 100% for 1 hour; the plates to be cured are grid plates with a thickness of 2.3 mm, and the plates are stacked and placed sideways in the curing chamber; the lead paste formula of the plates to be cured includes, by weight, 80 parts of lead powder, 4 parts of red lead, 6 parts of water, 7 parts of dilute sulfuric acid, 0.06 parts of fiber, and 4 parts of graphite; (2) Steaming stage: 100°C steam is passed through the plates in the curing chamber to heat and humidify them, so that the humidity reaches 100% and the temperature reaches 80°C to 100°C. The time above 80°C is controlled within 55 minutes. (3) Curing stage: control humidity ≥ 75% and temperature 60°C by opening the dehumidification damper at 5% to 35%; open the fresh air inlet at 100%, start the circulating fan, the circulating air pressure is 3 mbar, and the time is 5 hours; (4) Drying conversion stage: the humidity is controlled at 35-85% and the temperature is 75°C by opening the dehumidification damper at 5%-25%; the fresh air inlet is opened at 100%, and the circulating fan is turned on with a circulating air pressure of 5 mbar and a time of 65 minutes; (5) Drying stage: The humidity is controlled at 0% to 35% and the temperature is 105°C by opening the dehumidification damper at 10% to 100%. The fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 5 mbar for 60 minutes.

[0034] Embodiment 3: A method for rapidly curing a lead-acid power battery plate comprises the following steps: (1) Plate loading stage: the plates to be cured are loaded into the curing chamber at a temperature of 42°C and a humidity of 100% for 1 hour; the plates to be cured are grid plates with a thickness of 2.3 mm, and the plates are stacked and placed sideways in the curing chamber; the lead paste formula of the plates to be cured includes, by weight, 80 parts of lead powder, 4 parts of red lead, 6 parts of water, 7 parts of dilute sulfuric acid, 0.06 parts of fiber, and 4 parts of graphite; (2) Steaming stage: 100°C steam is passed through the plates in the curing chamber to heat and humidify them, so that the humidity reaches 100% and the temperature reaches 80°C to 100°C. The time above 80°C is controlled within 80 minutes. (3) Curing stage: control humidity ≥ 75% and temperature 50°C by opening the dehumidification damper at 5% to 35%; open the fresh air inlet at 100%, start the circulating fan, the circulating air pressure is 6 mbar, and the time is 4.5 hours; (4) Drying conversion stage: the humidity is controlled at 35% to 85% and the temperature is 65°C by opening the dehumidification damper at 5% to 25%; the fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 8 mbar for 55 minutes; (5) Drying stage: The humidity is controlled at 0-35% and the temperature is 105°C by opening the dehumidification damper at 10%-100%. The fresh air inlet is opened at 100%, and the circulating fan is turned on with a circulating air pressure of 8 mbar for 45 minutes.

[0035] Embodiment 4: A method for rapidly curing a lead-acid power battery plate comprises the following steps: (1) Plate feeding stage: the plates to be cured are fed into the curing chamber at a temperature of 40°C and a humidity of 100% for 1 hour; the plates to be cured are grid plates with a thickness of 2.3 mm, and the plates are stacked and placed sideways in the curing chamber; the lead paste formula of the plates to be cured includes, by weight, 80 parts of lead powder, 4 parts of red lead, 6 parts of water, 7 parts of dilute sulfuric acid, 0.06 parts of fiber, and 4 parts of graphite; (2) Steaming stage: 100°C steam is passed through the plates in the curing chamber to heat and humidify them, so that the humidity reaches 100% and the temperature reaches 80°C to 100°C. The time above 80°C is controlled within 60 minutes. (3) Curing stage: control humidity ≥ 75% and temperature 55°C by opening the dehumidification damper at 5% to 35%; open the fresh air inlet at 100%, start the circulating fan, the circulating air pressure is 4 mbar, and the time is 5 hours; (4) Drying conversion stage: the humidity is controlled at 35% to 85% and the temperature is 65°C by opening the dehumidification damper at 5% to 25%; the fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 6 mbar for 60 minutes; (5) Drying stage: The humidity is controlled at 0% to 35% and the temperature is 108°C by opening the dehumidification damper at 10% to 100%; the fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 6 mbar for 50 minutes.

[0036] Embodiment 5: A method for rapidly curing a lead-acid power battery plate comprises the following steps: (1) Plate feeding stage: the plates to be cured are fed into the curing chamber at a temperature of 40°C and a humidity of 100% for 1 hour; the plates to be cured are grid plates with a thickness of 2.3 mm, and the plates are stacked and placed sideways in the curing chamber; the lead paste formula of the plates to be cured includes, by weight, 80 parts of lead powder, 4 parts of red lead, 6 parts of water, 7 parts of dilute sulfuric acid, 0.06 parts of fiber, and 4 parts of graphite; (2) Steaming stage: 100°C steam is passed through the plates in the curing chamber to heat and humidify them, so that the humidity reaches 100% and the temperature reaches 80°C to 100°C. The time above 80°C is controlled within 60 minutes. (3) Curing stage: control humidity ≥ 75% and temperature 60°C by opening the dehumidification damper at 5% to 35%; open the fresh air inlet at 100%, start the circulating fan, the circulating air pressure is 5 mbar, and the time is 4.5 hours; (4) Drying conversion stage: the humidity is controlled at 35% to 85% and the temperature is 60°C by opening the dehumidification damper at 5% to 25%; the fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 5 mbar and a time of 65 minutes; (5) Drying stage: The humidity is controlled at 0% to 35% and the temperature is 110°C by opening the dehumidification damper at 10% to 100%; the fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 5 mbar for 60 minutes.

[0037] Embodiment 6: A method for rapidly curing a lead-acid power battery plate comprises the following steps: (1) Plate feeding stage: the plates to be cured are fed into the curing chamber at a temperature of 40°C and a humidity of 100% for 1 hour; the plates to be cured are grid plates with a thickness of 2.3 mm, and the plates are stacked and placed sideways in the curing chamber; the lead paste formula of the plates to be cured includes, by weight, 80 parts of lead powder, 4 parts of red lead, 6 parts of water, 7 parts of dilute sulfuric acid, 0.06 parts of fiber, and 4 parts of graphite; (2) Steaming stage: 100°C steam is passed through the plates in the curing chamber to heat and humidify them, so that the humidity reaches 100% and the temperature reaches 80°C to 100°C. The time above 80°C is controlled within 50 minutes. (3) Curing stage: control humidity ≥ 75% and temperature 55°C by opening the dehumidification damper at 5% to 35%; open the fresh air inlet at 100%, start the circulating fan, the circulating air pressure is 8 mbar, and the time is 5 hours; (4) Drying conversion stage: the humidity is controlled at 35% to 85% and the temperature is 70°C by opening the dehumidification damper at 5% to 25%; the fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 8 mbar for 55 minutes; (5) Drying stage: The humidity is controlled at 0% to 35% and the temperature is 110°C by opening the dehumidification damper at 10% to 100%; the fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 8 mbar for 45 minutes.

[0038] Embodiment 7: A method for rapidly curing a lead-acid power battery plate comprises the following steps: (1) Plate feeding stage: the plates to be cured are fed into the curing chamber at a temperature of 40°C and a humidity of 100% for 1 hour; the plates to be cured are grid plates with a thickness of 2.3 mm, and the plates are stacked and placed sideways in the curing chamber; the lead paste formula of the plates to be cured includes, by weight, 80 parts of lead powder, 4 parts of red lead, 6 parts of water, 7 parts of dilute sulfuric acid, 0.06 parts of fiber, and 4 parts of graphite; (2) Steaming stage: 100°C steam is passed through the plates in the curing chamber to heat and humidify them, so that the humidity reaches 100% and the temperature reaches 80°C to 100°C. The time above 80°C is controlled within 60 minutes. (3) Curing stage: control humidity ≥ 75% and temperature 60°C by opening the dehumidification damper at 5% to 35%; open the fresh air inlet at 100%, start the circulating fan, the circulating air pressure is 3 mbar, and the time is 5 hours; (4) Drying conversion stage: the humidity is controlled at 35-85% and the temperature is 75°C by opening the dehumidification damper at 5%-25%; the fresh air inlet is opened at 100%, and the circulating fan is turned on with a circulating air pressure of 7 mbar for 60 minutes; (5) Drying stage: The humidity is controlled at 0% to 35% and the temperature is 110°C by opening the dehumidification damper at 10% to 100%; the fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 7 mbar for 45 minutes.

[0039] Embodiment 8: A method for rapidly curing a lead-acid power battery plate comprises the following steps: (1) Plate feeding stage: the plates to be cured are fed into the curing chamber at a temperature of 40°C and a humidity of 100% for 1 hour; the plates to be cured are grid plates with a thickness of 2.3 mm, and the plates are stacked and placed sideways in the curing chamber; the lead paste formula of the plates to be cured includes, by weight, 80 parts of lead powder, 4 parts of red lead, 6 parts of water, 7 parts of dilute sulfuric acid, 0.06 parts of fiber, and 4 parts of graphite; (2) Steaming stage: 100°C steam is passed through the plates in the curing chamber to heat and humidify them, so that the humidity reaches 100% and the temperature reaches 80°C to 100°C. The time above 80°C is controlled within 60 minutes. (3) Curing stage: control humidity ≥ 75% and temperature 50°C by opening the dehumidification damper at 5% to 35%; open the fresh air inlet at 100%, start the circulating fan, the circulating air pressure is 5 mbar, and the time is 5 hours; (4) Drying conversion stage: the humidity is controlled at 35% to 85% and the temperature is 65°C by opening the dehumidification damper at 5% to 25%; the fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 7 mbar for 60 minutes; (5) Drying stage: The humidity is controlled at 0% to 35% and the temperature is 105°C by opening the dehumidification damper at 10% to 100%; the fresh air inlet is opened at 100% and the circulating fan is turned on with a circulating air pressure of 7 mbar for 45 minutes.

[0040] Comparative Example 1: A lead-acid power battery plate curing method comprises the following steps: (1) Board entry: temperature 40°C, humidity 100%, time 3 hours; (2) First stage curing: temperature 48°C, humidity 100%, time 4 hours; (3) Second stage curing: 51°C, 100% humidity, 3 hours; (4) The third stage of curing: 55°C, humidity 97%, time 3 hours; (5) Fourth stage curing: 55°C, humidity 92%, time 3 hours; (6) Fifth stage curing: 65°C, humidity 85%, time 30 hours; (7) First drying stage: 70°C, 0% humidity, 2 hours; (8) Second drying stage: 75°C, 0% humidity, 16 hours.

[0041] The performance of the electrode plates after drying in the above examples was tested, and the results are shown in Table 1.

[0042] Table 1: Plate performance test results.

[0043] The rapid cycle life of the plates in Examples 1 and 2 and Comparative Example 1 (assembled into 12V 20AH batteries and configured into 48V 20AH battery packs) was tested. The method is shown in Table 2 and the test results are shown in Table 3.

[0044] Table 2: Plate rapid cycle life test method Table 3: Plate rapid cycle life test results From the above results, it can be seen that the curing time of the embodiment using the method of the present invention can be significantly shortened compared with the conventional curing method in Comparative Example 1, while the plate performance and fast cycle life can be maintained at the same level as in Comparative Example 1. While ensuring the plate performance, the production efficiency can be greatly improved.

Claims

1. A method for rapid curing of lead-acid power battery plates, characterized in that: The steps include: (1) Plate loading stage: The plates to be cured are loaded into the curing chamber for a period of ≤ 3 hours; (2) Steaming stage: 100℃~120℃ steam is passed into the curing room for heating and humidification, so that the humidity reaches 100% and the temperature reaches 80℃~100℃. The time above 80℃ is controlled within 50min~80min; (3) Curing stage: control relative humidity ≥ 75%, temperature 50℃~60℃; add fresh air, turn on the circulating fan, circulating air pressure 3mba~6mbar, time 4.5h~5h; (4) Drying conversion stage: control the relative humidity to 35%~85%, the temperature to 65℃~75℃; supply fresh air, turn on the circulating fan, the circulating air pressure is 5 mbar~8mbar, and the time is 55 min~65 min; (5) Drying stage: control relative humidity at 0%~35% and temperature at 105℃~110℃; add fresh air, turn on the circulating fan, the circulating air pressure is 5 mbar~8mbar, and the drying time is 45 min~60 min.

2. The method for rapid curing of lead-acid power battery plates according to claim 1, characterized in that: In parts by weight, the lead paste formula of the plate to be cured includes: 70 to 82 parts of lead powder, 3 to 5 parts of red lead, 6 to 7 parts of water, 6.5 to 8.0 parts of dilute sulfuric acid, and 0.06 to 0.07 parts of fiber.

3. The method for rapid curing of lead-acid power battery plates according to claim 1, characterized in that: The electrode plate described in step (1) is a punched grid plate or a continuously cast grid plate with a thickness of less than 2.6 mm.

4. The method for rapid curing of lead-acid power battery plates according to claim 1, characterized in that: After the plates are loaded in step (1), the plates are stacked and placed sideways or vertically on a curing rack in the curing room.

5. The method for rapid curing of lead-acid power battery plates according to claim 1, characterized in that: In step (1), the plate is placed at 38°C to 42°C and relative humidity ≥ 98%.

6. The method for rapid curing of lead-acid power battery plates according to claim 1 or 2, characterized in that: In step (1), steam at 100°C to 120°C is passed for humidification, and the steam volume is ≤ 15% of the maximum steam volume.

7. The method for rapid curing of lead-acid power battery plates according to claim 1, characterized in that: The amount of steam introduced in step (2) is 60% to 100% of the maximum steam amount.

8. The method for rapid curing of lead-acid power battery plates according to claim 1, characterized in that: In steps (3) to (5), the humidity is controlled by controlling the opening of the dehumidification damper of the curing chamber.

9. The method for rapid curing of lead-acid power battery plates according to claim 8, characterized in that: In step (3), the opening of the dehumidification damper is 5% to 35%, in step (4), the opening of the dehumidification damper is 5% to 25%, and in step (5), the opening of the dehumidification damper is 10% to 100%.

10. The method for rapid curing of lead-acid power battery plates according to claim 1, characterized in that: In steps (3) to (5), fresh air is supplied by controlling the opening of the fresh air inlet of the curing chamber, and the opening of the fresh air inlet is 100%.

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