JP2015135195A - Pole plate drying device for secondary battery and pole plate drying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pole plate drying device for a secondary battery and a pole plate drying method in which a quite high drying effect for the pole plate by a few consumption power and short drying time can be attained and a discharging amount of carbon dioxide is less.SOLUTION: A pole plate drying device for a secondary battery includes a pressure reducing chamber 1. The pressure reducing chamber 1 has a pole plate and a heating unit 2 in it and a ventilation valve 11 is installed outside of it. A vacuum pump 3 is connected to the pressure reducing chamber 1. The pole plate to be dried is installed in the pressure reducing chamber 1, the heating unit 2 installed in the pressure reducing chamber 1 is turned on to perform a heating operation and at the same time the vacuum pump 3 connected to the pressure reducing chamber 1 is turned on to perform vacuum discharging at the pressure reducing chamber 1, the pressure is adjusted by the ventilation valve 11 on the pressure reducing chamber 1, a boiling temperature of water is also decreased as the pressure is reduced, so that an inner pressure in the pressure reducing chamber 1 is decreased due to vacuum discharging of the vacuum pump 3 and along with this state, a boiling point of water on the pole plate is lowered and the pole plate is dried.

Description

  The present invention relates to an electrode plate drying apparatus for a storage battery and a method thereof, and in particular, since the structure design is simple, the manufacturing cost is low and maintenance is easy, and a high electrode plate drying effect is obtained with low power consumption and drying time. The present invention relates to an electrode plate drying apparatus and method for a storage battery that emits less carbon dioxide.

  The various lead storage batteries that are commonly seen are storage batteries composed of components such as a positive electrode plate, a negative electrode plate, a separator, a battery stack, an electrolytic solution, and a connection terminal, and are charged after being discharged by converting chemical energy and DC electric energy. Because it returns to the original state, it can be used repeatedly.

When manufacturing the electrode plates of these storage batteries, the positive and negative electrode materials are respectively applied on the positive and negative electrode plates, and then the positive and negative electrode materials applied on the positive and negative electrode plates are dried and cured by a drying process. As shown in FIG. 2, the conventional drying apparatus 4 that performs a drying operation on the positive and negative electrode plates mainly includes a drying chamber 41.
An electrode plate is installed in the drying chamber 41, and a combustion chamber 42 is provided corresponding to the drying chamber 41. A gas combustion device 43 is connected to the combustion chamber 42, hot air is generated in the combustion chamber 42 by combustion of the gas combustion device 43, and a wind circulation blower 44 is connected between the combustion chamber 42 and the drying chamber 41. The hot air generated in the combustion chamber 42 is introduced into the drying chamber 41 by the wind circulation blower 44, and after the electrode plate to be dried is installed in the drying chamber 41, combustion is performed using the gas combustion device 43, After generating hot air in the combustion chamber 42, the hot air in the combustion chamber 42 is introduced into the drying chamber 41 by the wind circulation blower 44, and the electrode plate is dried in the drying chamber 41 by the introduced hot air.

  However, since the above-described drying apparatus performs the drying operation directly on the electrode plate in the drying chamber using hot air during the electrode plate drying operation, a large amount of energy is required to completely dry the electrode plate. It is necessary, and a large amount of carbon dioxide is discharged in the process of generating hot air by combustion, and the drying apparatus is expensive and not easy to maintain, so there is a need for improvement in the overall structural design.

Therefore, there is a need for a practical storage battery electrode drying apparatus and method that can improve the structure and drawbacks of the prior art.
The object of the present invention is that the structural design is simple, the manufacturing cost is low, the maintenance is easy, the very high electrode plate drying effect is obtained with low power consumption and drying time, and the carbon dioxide emission is small. An object of the present invention is to provide an electrode plate drying apparatus and method for a storage battery.

  In order to solve the above problems, according to a first aspect of the present invention, there is provided an electrode plate drying apparatus for a storage battery including a decompression chamber, wherein the decompression chamber includes an electrode plate and a heating unit. A storage battery electrode plate drying apparatus is provided, wherein a ventilation valve is attached to the outside, and a vacuum pump is connected to the decompression chamber.

  The electrode plate to be dried is installed in the decompression chamber, the heating unit installed in the decompression chamber is turned on to perform heating, and the vacuum pump connected to the decompression chamber is turned on. Evacuation is performed, the pressure is adjusted by a vent valve on the decompression chamber, and the boiling point of water decreases as the pressure decreases. Therefore, the vacuum pump exhausts the internal pressure of the decompression chamber, and accordingly It is preferable that the boiling point of moisture on the electrode plate is lowered and the electrode plate is dried.

  Preferably, the temperature of the heating unit is controlled to 65 to 100 ° C., and the vacuum degree of the decompression chamber is maintained at −300 mmHg to 600 mmHg.

It is a schematic diagram which shows the electrode plate drying apparatus of the storage battery which concerns on one Embodiment of this invention. It is a schematic diagram which shows the electrode plate drying apparatus of the conventional storage battery.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited thereby.

  Please refer to FIG. FIG. 1 is a schematic diagram showing an electrode plate drying apparatus for a storage battery according to an embodiment of the present invention. As shown in FIG. 1, the storage battery electrode plate drying apparatus of this embodiment includes a decompression chamber 1. A heating unit 2 is disposed in the decompression chamber 1. The heating unit 2 may be a heater, a steam plate, or the like. A vent valve 11 is attached to the decompression chamber 1 on the outside. When the vacuum pump 3 is connected to the decompression chamber 1 and the recovered industrial waste heat source is introduced into the decompression chamber 1, the temperature in the decompression chamber 1 increases.

When actually using the electrode plate drying apparatus of the storage battery of this embodiment, the electrode plate is washed after pickling, the moisture on the surface of the electrode plate is blown off by a high-power electric fan, and the electrode plate to be dried is a decompression chamber. 1 is installed, and the heating unit 2 installed in the decompression chamber 1 is turned on to perform heating.
When the temperature of the heating unit 2 is controlled to 65 to 100 ° C. and the vacuum pump 3 connected to the decompression chamber 1 is turned on, the decompression chamber 1 is evacuated by the vacuum pump 3, and the pressure is obtained by the vent valve 11 on the decompression chamber 1. The vacuum degree in the decompression chamber 1 can be maintained at -300 mmHg to 600 mmHg.
Since the boiling point of water has a characteristic of decreasing with a decrease in pressure, the internal pressure of the decompression chamber 1 is lowered by the vacuum exhaust of the vacuum pump 3, and the boiling point of moisture on the electrode plate is lowered accordingly, and the minimum consumption The electrode plate can be efficiently dried within electric power and in the shortest time.

The experimental results of the present invention are shown in (A) to (D) below.
(A) 1.7 kg of 4 kg of water on the closely arranged electrode plates was dehydrated under the conditions of a temperature of 70 ° C. in the decompression chamber 1, a negative pressure of 50 kpa, and a drying time of 3 hours. .5%.
(B) Under the conditions of a temperature of 70 ° C. in the decompression chamber 1, a negative pressure of 50 kpa, and a drying time of 3 hours, 1.5 kg of 1.7 kg of water on the electrode plates arranged at large intervals is dehydrated, and the dehydration The rate is 88.2%.
(C) 1.7 kg of 2.5 kg of water on the closely arranged electrode plates is dehydrated under the conditions of a temperature in the decompression chamber 1 of 70 ° C., a negative pressure of 50 kpa, and a drying time of 6 hours, and the dehydration rate Is 68%.
(D) Under the conditions of 70 ° C. in the decompression chamber 1, 50 kpa negative pressure and 6 hours drying time, 1.6 kg out of 1.7 kg of water content on the electrode plates arranged at large intervals, The dehydration rate is 94.1%.

  As can be seen from the above experimental data, the present invention has an excellent drying effect.

As can be seen from the above description, the storage battery electrode plate drying apparatus of the present invention has the following advantages (1) and (2) as compared with the conventional structure.
(1) By lowering the pressure in the decompression chamber, the boiling point of water on the electrode plate can be lowered, a high electrode plate drying effect can be obtained with less power consumption and drying time, and carbon dioxide emissions can be reduced.
(2) Heating is performed in the decompression chamber using a heating unit, and vacuum pumping is performed in the decompression chamber using a vacuum pump. Simplification of the structure greatly reduces manufacturing costs and facilitates maintenance. It can be performed.

  While the preferred embodiments of the present invention have been disclosed above, as may be appreciated by those skilled in the art, they are not intended to limit the invention in any way. Various changes and modifications can be made without departing from the spirit and scope of the present invention. Accordingly, the scope of the claims of the present invention should be construed broadly including such changes and modifications.

DESCRIPTION OF SYMBOLS 1 Decompression chamber 2 Heating unit 3 Vacuum pump 4 Drying device 11 Ventilation valve 41 Drying chamber 42 Combustion chamber 43 Gas combustion device 44 Wind circulation blower

Claims (3)

An electrode plate drying apparatus for a storage battery having a decompression chamber,
The vacuum chamber has an electrode plate and a heating unit disposed therein, and a vent valve attached to the outside.
An electrode plate drying apparatus for a storage battery, wherein a vacuum pump is connected to the decompression chamber.   The electrode plate to be dried is installed in the decompression chamber, the heating unit installed in the decompression chamber is turned on to perform heating, and the vacuum pump connected to the decompression chamber is turned on. Evacuation is performed, the pressure is adjusted by a vent valve on the decompression chamber, and the boiling point of water decreases as the pressure decreases. Therefore, the vacuum pump exhausts the internal pressure of the decompression chamber, and accordingly A method for drying an electrode plate of a storage battery, wherein the electrode plate is dried by lowering the boiling point of moisture on the electrode plate. Controlling the temperature of the heating unit to 65-100 ° C,
The electrode plate drying method for a storage battery according to claim 2, wherein the vacuum degree of the decompression chamber is maintained at -300 mmHg to 600 mmHg.

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