KR101782466B1 - Secondary battery plate cooling method - Google Patents

Abstract

The present invention relates to a method for cooling an electrode plate for a secondary battery. The method includes the steps of: (A) inputting an electrode plate into an enclosed chamber separated from the outside; (B) injecting 950 to 1000 Torr of a catalyst, which is an inert gas selected from nitrogen, argon, carbonic acid, and helium for accelerating the heat absorption in the chamber; (C) downwardly blowing the catalyst injected to the chamber by using a blowing fan, enabling the catalyst to absorb heat from the electrode plate while passing through the center of the chamber, discharging the catalyst to the outside of the chamber, cooling the heat absorbed in a heat exchanger, and circulating the catalyst in a path for going back into the blowing fan in the chamber to cool the electrode plate while circulating a coolant into the heat exchanger for coming in contact with the catalyst in an indirect manner to absorb the absorbed heat again; and (D) discharging the electrode plate after recovering the catalyst. The present invention can enhance the overall quality and reduce the number of steps in an operation by cooling the catalyst through circulating the catalyst forcefully injected to form air flows and accelerate heat absorption through the inside and the outside in a high-pressure state.

Description

[0001] The present invention relates to a secondary battery plate cooling method for cooling an electrode plate for a secondary battery,

The present invention relates to a method for cooling an electrode plate for a secondary battery, and more particularly, to a method for cooling an electrode plate for a secondary battery and a cathode plate for a secondary battery using a hot plate heated by hot air to dry a binder or a solvent applied to the electrode plate And cooling it in a stable state.

Generally, the secondary battery is charged and discharged by the oxidation and reduction reactions of the positive electrode plate and the negative electrode plate, and the quality of the battery varies depending on the drying state at the time of manufacturing the electrode plate. When the negative electrode or the positive electrode plate contains moisture, impurities such as oil and gas, the action of the polarity becomes irregular or poor, and the rated energy is not generated, and the life of the battery is remarkably reduced.

Recently, Korean Patent Registration No. 10-1175032 "Plate Drying Apparatus" and Korean Patent Registration No. 10-1193169 "Plate Drying Apparatus and Method" have been proposed recently to solve such a problem. In accordance with the proposed document, the electrode plate was put into a sealable chamber from the outside, and after the chamber was changed to a vacuum state, the air flow was heated by a built-in heater and dried by circulating hot air. Therefore, it is possible to improve the overall quality by eliminating the oxygen contained in the air stream in the vacuum process, preventing oxidation, and drying in a clean state in which impurities of the electrode plate are removed together with foreign substances contained in the air stream.

On the other hand, the plate subjected to the drying process must be cooled down to room temperature in order to carry out a subsequent process. At present, as a method for cooling a high temperature plate, cooling or cooling is adopted either by natural cooling which is left in a predetermined space or by forced cooling which is blown by a blade.

Therefore, it takes a long time to wait until the electrode plate is cooled down to room temperature. In addition to this, the space required for the atmosphere is wasted. Also, as the high temperature plate is increased, the cooling time becomes exponentially longer, have.

Korean Patent Registration No. 10-1175032 entitled " Korean Patent Registration No. 10-1193169 entitled "

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a method of manufacturing a plasma display panel in which a catalyst, which is airtight, The present invention provides a cooling method for an electrode plate for a secondary battery that can be cooled by a heat exchange process inside and outside, thereby improving the overall quality and shortening the manufacturing time.

In order to achieve the above object, the present invention provides a plasma processing apparatus comprising: a main body including a tunnel-shaped chamber in which at least one electrode plate is allowed to go in and out, and a door for opening and closing the inside and outside of the chamber; A conveying unit including a rail for guiding the entrance and exit of the electrode plate on the chamber, and a conveying unit connected to the electrode plate by magnetic force to make contact and exit without contact; A cooling unit including a blowing fan for circulating the airflow on the chamber at a predetermined wind speed and a rich atmosphere, and a duct for circulating the airflow of the chamber in and out; A method for cooling an electrode plate for a secondary battery using a cooling device comprising an injection channel on which an electrode catalyst for accelerating the heat absorption of the electrode plate is discharged on the chamber, and an acceleration unit comprising a heat exchanger for accelerating the cooling of the airflow on the duct, A) injecting the electrode plate into an enclosed chamber outside; (B) injecting a catalyst, which is an inert gas selected from nitrogen, argon, carbonic acid, and helium, accelerating endothermic reaction into the chamber at 950 Torr to 1000 Torr; (C) The catalyst injected into the chamber is blown downward by a blowing fan, the blown catalyst absorbs the heat of the plate while passing through the center of the chamber, and then is discharged to the outside of the chamber to absorb heat absorbed by the heat exchanger Circulating the cooling plate through a path where the cooling plate is cooled and then re-sucked into the blowing fan in the chamber to cool the plate, and cooling water circulating inside the heat exchanger indirectly in contact with the catalyst to absorb the absorbed heat; (D) recovering the catalyst and discharging the electrode plate.

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It should be understood, however, that the terminology or words of the present specification and claims should not be construed in an ordinary sense or in a dictionary, and that the inventors shall not be limited to the concept of a term It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be properly defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

As described in the above construction and operation, according to the present invention, the catalyst is injected by forcefully injecting a catalyst that is enclosed with the outside and impurities removed, and accelerates the endotherm along with the formation of the air stream, and then circulates through the heat exchanger. The quality is improved and the manufacturing time is shortened.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart briefly illustrating a cooling method according to the present invention. FIG.
Figs. 2 to 4 are reference views showing a cooling device for carrying out the method of Fig. 1; Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a method for rapidly cooling a hot plate heated by hot air to dry a binder or a solvent applied to a plate during a series of processes for manufacturing a negative electrode and a positive electrode for a secondary battery, Is a cooling method for an electrode plate for a secondary battery that can be improved overall and shortened in manufacturing time through steps A) to D).

To implement the drying method of the present invention, a cooling device 100 as shown in FIG. 2 may be used. The cooling device 100 is only for the purpose of facilitating understanding of the present invention, and thus need not be limited to the structure shown in the drawings. For example, the cooling apparatus 100 includes a main body 10, a transfer unit 20, a cooling unit 30, and an acceleration unit 40.

First, the main body 10 comprises a tunnel-shaped chamber 11 in which at least one electrode plate 1 can enter and exit from the inside and the outside, and a door 15 for opening and closing the inside and outside of the chamber 11, The transfer unit 20 is constituted by a rail 21 for guiding the entrance and exit of the electrode plate 1 on the chamber 11 and a transfer unit 25 connected to the electrode plate 1 by a magnetic force to make contact and exit in a noncontact manner.

The cooling section 30 is constituted by a blowing fan 31 for circulating the airflow on the chamber 11 at a predetermined wind speed and a rich atmosphere and a duct 35 for circulating the airflow of the chamber 11 inward and outward, The unit 40 includes an injection path 41 through which a catalyst for accelerating the heat absorption of the electrode plate 1 is discharged on the chamber 11 and a heat exchanger 45 that accelerates the cooling of the airflow on the duct 35 do.

The operation and role of the cooling device 100 according to this embodiment will be described with reference to the steps described later.

First, step (A) according to the present invention is a process of putting the electrode plate 1 having a high temperature, which has been dried, into the chamber 11 which is hermetically sealed with the outside as shown in FIG. That is, the electrode plate 1 transferred by the transfer unit (drying apparatus) is placed on the rail 21 and completely enters the chamber 11 along the transfer unit 25 at the lower end. Then, the door 15 comes down to seal the chamber 11.

Here, the electrode plate 1 may be constituted by winding a reel-like sheet in a state in which a separator is interposed between the plates of the positive electrode and the negative electrode according to the configuration of the battery, or alternatively, plates of positive and negative plates formed in a plate- .

Next, step (B) according to the present invention is a process of injecting a catalyst for accelerating the endothermic pressure into the chamber 11 at a predetermined pressure, as shown in FIG. That is, the injection flow path 41 forcibly injects the catalyst into the chamber 11 to switch from the atmospheric pressure state to the high pressure state.

The catalyst forms a gas flow inside the chamber 11 and accelerates endothermic reaction. This catalyst may be any one of nitrogen, argon, carbonic acid, and helium as an inert gas that does not cause reaction with the electrode plate (1).

At this time, the pressure of the catalyst injected into the chamber 11 is very important. The higher the pressure of the catalyst injected into the chamber 11, the more the role is doubled. However, if the pressure of the catalytic agent is too high, durability of bringing the transfer part 20 and the cooling part 30 included in the inside of the chamber 11 together with the pressure vessel is provided in addition to the chamber 11, there is a problem.

On the other hand, if the pressure of the catalyst is too low, the time and energy consumed for cooling due to the lack of endotherm must be increased. Therefore, the catalyst is preferably injected at 950 Torr to 1000 Torr.

Next, step (C) according to the present invention is a process of cooling the electrode plate 1 by circulating the injected catalyst from the inside of the chamber 11 to the outside as shown in FIG. That is, the catalyst injected into the chamber 11 is blown downward by the blowing fan 31, and the blown catalyst agent absorbs the heat of the electrode plate 1 through the center of the chamber 11.

The catalyst heated by the absorption of heat is discharged to the duct 35 which communicates with the outside of the chamber 11 and is cooled after passing through the heat exchanger 45 interposed on the duct 35, And is then recirculated to the fan 31 again.

At this time, it is preferable to further cool the cooling water for indirectly contacting the catalyst in the heat exchanger (45) to reabsorb the absorbed heat. The heat exchanger 45 can cool the catalyst passing through the inside through the air stream or the cooling water that is in contact with the surface. The cooling water has a high cooling efficiency and can be used without any limitation on the capacity of the chamber 11. Needless to say, a separate facility for circulating the cooling water is required, so it is preferable to apply it according to the number of the electrode plates 1 to be cooled.

Finally, step (D) according to the present invention is a process of recovering the catalyst injected into the chamber 1 and then discharging the cooled electrode plate 1 to the outside. That is, after the cooling of the electrode plate 1 is completed, the injection path 41 discharges the catalyst injected into the chamber 11 to its original position. The door 15 is then lifted to open the chamber 11 and the electrode plate 1 seated on the rail 21 is discharged to the outside along the lower transfer unit 25. The discharged electrode plate (1) is completed through an assembling process.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment of the present invention will be described, and it will be understood that substantial effects are possible.

<< First Experiment >>

In the first experiment, it is tried to investigate the difference between cooling of a blowing fan in a conventional vacuum state and cooling of an inert gas (nitrogen) in a blowing fan in the injected state as in the present invention.

<Experimental Method>

The experiment was carried out in the same manner as in Example 1 in which the inside of the chamber 11 of the present invention was vacuum-treated at 700 Torr, Example 2 which was treated at the atmospheric pressure (760 Torr) and Example 2 where the catalyst (nitrogen) was injected at 1000 Torr 3, and then to investigate the temperature cooled by air blowing for 120 minutes.

<Experimental Conditions>

Experimental conditions were as follows. The cooling samples used in each example were composed of plate plates wound in a reel shape as shown below, and temperature was measured through a temperature sensor at the center of each plate plate. Here, the cooling samples were all dried under the same conditions and cooled at a center temperature of 130 ° C. ⅓.

Dry sample Sensor location

&Lt; Measurement result >

              <Results> Unit: ℃ Example 1 Example 2 Example 3 90 69 60

As a result of the measurement, the temperature of Example 1 was 90 ° C, the temperature of Example 2 was 69 ° C, and the temperature of Example 3 was 60 ° C. That is, it can be seen that the cooling method of Embodiment 3 in which the catalyst (nitrogen) is injected into the chamber 11 is most excellent.

&Lt; Second Experiment &

In the second experiment, the cooling performance according to the pressure of the catalyst (nitrogen) forced into the chamber 11 is investigated.

<Experimental Method>

The experimental method was as follows: Example 1 in which the catalyst (nitrogen) was injected at 950 Torr, Example 2 injected at 900 Torr, and Example 3 injected at 800 Torr into the chamber 11 of the present invention, We want to know the cooled temperature.

<Experimental Conditions>

Experimental conditions were as follows. The cooling samples used in each example were composed of plate plates wound in a reel shape as shown below, and temperature was measured through a temperature sensor at the center of each plate plate. Here, the cooling samples were all dried under the same conditions and cooled at a center temperature of 130 ° C. ⅓.

Dry sample Sensor location

&Lt; Measurement result >

                            <Results> Unit: ℃ Example 1 Example 2 Example 3 48 65 87

As a result of the measurement, the temperature of Example 1 was 48 ° C, the temperature of Example 2 was 65 ° C, and the temperature of Example 3 was 87 ° C. That is, it can be seen that the cooling method of Example 1 in which the catalyst (nitrogen) is injected into the chamber 11 at 950 Torr is the most excellent.

On the other hand, as can be seen from the first experiment and the second experiment, nitrogen can be forcibly injected into the chamber 11, and the optimum cooling performance can be achieved only when injected in the range of 950 to 1000 Torr.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

1: electrode plate 10:
11: chamber 15: door
20: feed part 21: guide rail
25: transfer unit 30: cooling unit
31: blower fan 35: duct
40: acceleration part 41:
45: heat exchanger 100: cooling device

Claims (5)

A main body including a tunnel-shaped chamber in which at least one electrode plate is allowed to go in and out, and a door which opens and closes the inside and outside of the chamber; A conveying unit including a rail for guiding the entrance and exit of the electrode plate on the chamber, and a conveying unit connected to the electrode plate by magnetic force to make contact and exit without contact; A cooling unit including a blowing fan for circulating the airflow on the chamber at a predetermined wind speed and a rich atmosphere, and a duct for circulating the airflow of the chamber in and out; A method for cooling an electrode plate for a secondary battery by using a cooling device comprising an injection passage on which an accelerator for accelerating the heat absorption of the electrode plate is injected on the chamber and an acceleration portion including a heat exchanger for accelerating the cooling of the airflow on the duct,
(A) injecting the electrode plate into an enclosed chamber outside;
(B) injecting a catalyst, which is an inert gas selected from nitrogen, argon, carbonic acid, and helium, accelerating endothermic reaction into the chamber at 950 Torr to 1000 Torr;
(C) The catalyst injected into the chamber is blown downward by a blowing fan, the blown catalyst absorbs the heat of the plate while passing through the center of the chamber, and then is discharged to the outside of the chamber to absorb heat absorbed by the heat exchanger Circulating the cooling plate through a path where the cooling plate is cooled and then re-sucked into the blowing fan in the chamber to cool the plate, and cooling water circulating inside the heat exchanger indirectly in contact with the catalyst to absorb the absorbed heat;
(D) recovering the catalyst, and then discharging the electrode plate. delete delete delete delete

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