KR102563771B1 - Heating roller for manufacturing secondary battery - Google Patents

Abstract

The heating roller for manufacturing a secondary battery according to the present invention, in which the entire area of the heating roller is divided into a plurality of heating areas and the temperature of each heating area can be precisely controlled, is disposed in the roller body and at the center of the inside of the roller body. A first heater forming a first heating region, disposed inside the roller body, and disposed at one side of the first heater to form a second heating region, disposed inside the roller body, the first heater A third heater disposed on the other side of the heater to form a third heating area, and a fourth heater disposed inside the roller body and wrapped around the second heater to compensate for the temperature of the second heating area. and a fifth heater disposed inside the roller body and provided in a shape surrounding the third heater to compensate for the temperature of the third heating region, thereby improving the quality of the secondary battery, reducing power loss, and providing a heater. The effect of improving the durability of can be derived.

Description

Heating roller for manufacturing secondary battery {Heating roller for manufacturing secondary battery}

The present invention relates to a heating roller for manufacturing a secondary battery, and more particularly, to a heating roller for manufacturing a secondary battery for heat-sealing an electrode assembly composed of a positive electrode plate, a separator, and a negative electrode plate of a secondary battery.

Recently, secondary batteries capable of charging and discharging have been widely used as energy sources or auxiliary power devices for wireless mobile devices. In addition, secondary batteries are electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles that are proposed as a solution to air pollution caused by conventional gasoline vehicles and diesel vehicles using fossil fuels. (Plug-In HEV) and the like are attracting attention as a power source.

Such a secondary battery is manufactured in a form in which an electrode assembly is included in a battery case together with an electrolyte solution. The electrode assembly is classified into a stack type, a folding type, and a stack-folding type according to a manufacturing method. In the case of a stack type or stack-folding type electrode assembly, a unit assembly has a structure in which positive electrodes and negative electrodes are sequentially stacked with a separator interposed therebetween. In order to make these unit assemblies, a laminating process for bonding between the electrode and the separator is required.

In the laminating process, the unit assembly is generally heated to bond the electrode and the separator. In this way, the heating roller used in the laminating process of heat-sealing an electrode assembly composed of a positive electrode plate, a separator, and a negative electrode plate may influence the quality of a secondary battery depending on the temperature formed over the entire area.

Therefore, there is a need for a technique capable of dividing the entire area of the heating roller into a plurality of heating areas and precisely controlling the temperature of each heating area.

Republic of Korea Patent Publication No. 2012-0060700 (Announced on June 12, 2012)

An object of the present invention is to provide a heating roller for manufacturing a secondary battery in which the entire area of the heating roller is divided into a plurality of heating regions and the temperature of each heating region can be precisely controlled.

Another object of the present invention is to provide a heating roller for manufacturing a secondary battery capable of reducing power loss and improving durability of a heater.

A heating roller for manufacturing a secondary battery according to the present invention includes a roller body, a first heater disposed in the central portion of the roller body to form a first heating region, and disposed inside the roller body, on one side of the first heater. A second heater disposed to form a second heating region, disposed inside the roller body, and disposed on the other side of the first heater to form a third heating region, disposed inside the roller body, A fourth heater provided in a form surrounding the circumference of the second heater and disposed inside the roller body to compensate for the temperature of the second heating area, provided in a form wrapped around the circumference of the third heater A fifth heater for temperature compensation may be included.

The first, second and third heaters may be far-infrared heaters.

The heating roller may further include first, second, and third temperature sensors for detecting temperatures of the first, second, and third heaters.

The heating roller is disposed between the inner side of the roller body and the first, second, third, fourth, and fifth heaters to transfer heat emitted from the first, second, third, fourth, and fifth heaters to the roller body. A heat conduction plate may be further included.

Both ends of the heat conduction plate are closed by flanges, and the heating roller is provided outside the flange to prevent heat emitted from the first, second, third, fourth, and fifth heaters from being lost to the inside of the roller body. It may further include an adiabatic guide ring to do.

The heating roller may further include a cooling passage passing through the adiabatic guide ring and the heat conduction plate to form a refrigerant circulation path.

The fourth heater and the fifth heater may be prepared by depositing a conductive paste on an inner circumferential surface of a cylindrical body made of any one of ceramic, alumina, and aluminum nitride using a silk screen technique.

The heating roller for manufacturing a secondary battery according to the present invention divides the entire area of the heating roller into a plurality of heating regions and precisely controls the temperature of each heating region, thereby improving the quality of the secondary battery.

In addition, the heating roller for manufacturing a secondary battery according to the present invention has an effect of reducing power loss and improving durability of a heater.

1 is a view showing a state of use of a heating roller for manufacturing a secondary battery according to an embodiment of the present invention.
2 is a cross-sectional view of a heating roller for manufacturing a secondary battery according to an embodiment of the present invention.
3 is a view showing the internal structure of a heating roller for manufacturing a secondary battery according to an embodiment of the present invention.
4 is a view showing an installation state of a temperature sensor of a heating roller according to an embodiment of the present invention.

The terms or words used in this specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventors may appropriately define the concept of terms in order to explain their invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that there is. Therefore, since the embodiments described in this specification and the configurations shown in the drawings are only one embodiment of the present invention and do not represent all of the technical spirit of the present invention, there may be various equivalents and modifications that can replace them. It should be understood that there is

Hereinafter, a heating roller for manufacturing a secondary battery according to the present invention will be described with reference to the accompanying drawings.

1 is a view showing a state of use of a heating roller for manufacturing a secondary battery according to an embodiment of the present invention, FIG. 2 is a view showing a cross-section of a heating roller for manufacturing a secondary battery according to an embodiment of the present invention, and FIG. It is a view showing the internal structure of a heating roller for manufacturing a secondary battery according to an embodiment of the present invention, and FIG. 4 is a view showing an installation state of a temperature sensor of a heating roller according to an embodiment of the present invention.

1 to 4, a heating roller 1 for manufacturing a secondary battery according to an embodiment of the present invention includes a roller body 100, a first heater 310, a second heater 320, and a third heater ( 330) may be included.

The roller body 100 may be provided as a cylindrical body. The roller body 100 may be supported on the shaft 200 so as to freely rotate separately from the shaft 200 . That is, the roller body 100 includes a cylindrical body 110 with both ends open and a cover 120 fastened to both ends of the cylindrical body 110 to close both ends of the cylindrical body 110, the cover A bearing 130 may be installed at the center of the 120. As the bearing 130, it is preferable to use a ceramic bearing having excellent heat resistance.

A hollow 210 may be formed in the shaft 200 . A power supply line for applying power to the heaters to be described later, a detection line for detecting the temperature of each heater region, etc. are introduced into the roller body 100 through the hollow 210 of the shaft 200. can

The first heater 310 , the second heater 320 and the third heater 330 are disposed inside the roller body 100 . The first heater 310 , the second heater 320 , and the third heater 330 may be provided in the form of heating coils wound in the longitudinal direction of the roller body 100 . The first, second, and third heaters 310, 320, and 330 are preferably provided as far-infrared heaters. This is because the heat generated from the far-infrared heater is emitted as radiant heat to quickly heat the roller body 100 and minimize power loss by minimizing the heat loss rate.

The first, second, and third heaters 310, 320, and 330 may be supported by the coil guide 400. The coil guide 400 may be provided as a cylindrical body and supported by the shaft 200 . The coil guide 400 maintains a gap between the heating coils and firmly maintains the position of the heating coils. At this time, it is preferable that the intervals between the heating coils of the first heater 310, the second heater 320, and the third heater 330 are spaced at uniform intervals in order to secure durability of the heating coil. The first, second, and third temperature sensors 510, 520, and 530 for detecting temperatures of the first, second, and third heaters 310, 320, and 330, respectively, may be installed inside the coil guide 400. The first, second, and third heaters 310, 320, and 330 are controlled at preset temperatures, respectively, but based on the temperatures detected by the first, second, and third temperature sensors 510, 520, and 530, the first, second, and third heaters 310, 320, and 330 are controlled in real time. The temperatures of the 2 and 3 heaters 310, 320 and 330 can be controlled.

The first heater 310 is disposed in the center of the roller body 100, the second heater 320 is disposed on one side of the first heater 310, and the third heater 330 is disposed on the first heater 310 It can be placed on the other side of. Accordingly, the roller body 100 has a first heating area A1 by the first heater 310, a second heating area A2 by the second heater 320, and a third area by the third heater 330. A heating area A3 may be formed.

As shown, the lengths of the second heater 320 and the third heater 330 are substantially the same, but may be shorter than those of the first heater 310 . Separate power is applied to the first heater 310, the second heater 320, and the third heater 330, respectively, and the second heating area A2 and the third heating area A3 are the first heating area ( A1) and can be controlled at a different temperature.

For example, the first heating area A1 corresponds to the area through which the electrode assembly E passes, and the second heating area A2 and the third heating area A3 pass through the edge of the electrode assembly E. area can be addressed. The temperature of the first heating area A1 may be set to a higher temperature than the temperatures of the second heating area A2 and the third heating area A3.

Therefore, the first heater 310 can heat the electrode assembly E with rolling pressure by heating the roller body 100 with the same area as the area where the roller body 100 is in contact with the electrode assembly E correspondingly. there is. The second heater 320 and the third heater 330 apply heat to the rest of the roller body 100, which is not in contact with the electrode assembly E, but at a lower temperature than the first heater 310 to minimize power consumption. It is possible to prevent deformation due to heat loss on both sides of the electrode assembly E by controlling to .

Meanwhile, since the second heater 320 and the third heater 330 are disposed at both ends of the roller body 100, the roller body 100 is provided in the second heating area A2 and the third heating area A3. Heat loss may occur on both sides of the Of course, even if heat loss is generated from the second heating area A2 and the third heating area A3, the temperature of the second heater 320 and the third heater 330 are individually controlled so that the second heating area A2 and heat loss in the third heating area A3 can be compensated for.

However, the heating coil 1 according to an embodiment of the present invention may further include a fourth heater 340 and a fifth heater 350 in order to more efficiently compensate for heat loss. The fourth heater 340 is disposed inside the roller body 100 and may be provided as a cylindrical body surrounding the second heating area A2. The fifth heater 350 is disposed inside the roller body 100 and may be provided as a cylindrical body surrounding the third heating area A3.

Here, the fourth heater 340 and the fifth heater 350 are for compensating for heat lost from the second heater 320 and the third heater 330, and the second and third heaters 320 and 330 Even if the heat is generated at a relatively low temperature compared to the heat source, it can sufficiently serve as an auxiliary heater.

Therefore, the fourth heater 340 and the fifth heater 350 are applied to the inner circumferential surfaces of the cylinders 341 and 352 made of any one of ceramic, alumina, and aluminum nitride, using a method such as a silk screen method to apply conductive paste. ) (342, 352) may be deposited.

Meanwhile, in the heating roller 1 according to an embodiment of the present invention, the heat emitted from the first, second, third, fourth, and fifth heaters 310, 320, 330, 340, and 350 is uniform to the roller body 100. The heat conduction plate 110 and the heat insulation guide ring 700 may be included to ensure proper transfer and minimize heat loss.

That is, the heat conduction plate 610 may be disposed inside the roller body 100 and outside the fourth heater 340 and the fifth heater 350 . The heat conduction plate 610 may be formed as a cylindrical body having an outer diameter smaller than the inner diameter of the roller body 100 and may be disposed in a form surrounding the first, second, and third heating areas A1, A2, and A3. Both ends of the heat conduction plate 110 are closed by flanges 620, and as the flanges 620 are supported on the shaft 200, the heat conduction plate 110 may be supported on the shaft 200.

In such a heat conduction plate 110, heat emitted from the first, second, third, fourth, and fifth heaters 310, 320, 330, 340, and 350 reaches the heat conduction plate 110, and the heat conduction plate 110 After being conducted in a uniform distribution with respect to the entire area, it is conducted to the roller body 100.

Therefore, compared to the embodiment in which the heat emitted from the first, second, third, fourth, and fifth heaters (310, 320, 330, 340, 350) directly reaches the roller body 100 to heat the roller body 100, Heat uniformity of the roller body 100 can be improved.

A cooling passage 630 through which refrigerant is supplied may be formed in the heat conduction plate 110 to cool the roller body 100 . The cooling passage 630 includes the flange 620 disposed on one side of the heat conduction plate 610 after the refrigerant flows into one side of the shaft 200, the heat conduction plate 610, and the other side of the heat conduction plate 610. A refrigerant circulation path through which the refrigerant can be discharged to the other side of the shaft 200 is formed through the flange 620 disposed thereon.

The insulated guide ring 700 may be disposed on the outer rim of the flange 620 . The heat insulation guide ring 700 confines the heat conducted to the heat conduction plate 110 by the heat generated by the first, second, third, fourth, and fifth heaters (310, 320, 330, 340, and 350) so that the roller body 100 to prevent heat loss to unnecessary space inside the Of course, it is preferable that a bearing (not shown) is installed between the adiabatic guide ring 700 and the cover 120 to enable rotation of the roller body 100 .

The heating rollers 1 are provided as a pair, and the pair of heating rollers 1 may be arranged so that the center of each shaft 200 is vertically aligned. The electrode assembly E composed of a positive electrode plate, a separator, and a negative electrode plate may be thermally fused while passing between the pair of roller bodies 100 .

As described above, since the heating roller 1 according to the present embodiment divides the entire area of the heating roller 1 into a plurality of heating regions and precisely controls the temperature of each heating region, the quality of the secondary battery can be improved. In addition, power loss can be reduced and durability of the heater can be improved.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and change the technical idea of the present invention in various forms. Therefore, these improvements and modifications will fall within the protection scope of the present invention as long as they are obvious to a person skilled in the art.

1: heating roller 100: roller body
200: shaft 310: first heater
320: second heater 330: third heater
340: fourth heater 350: fifth heater
400: coil guide 510: first temperature sensor
520: second temperature sensor 530: third temperature sensor

Claims (7)

roller body;
a first heater disposed in the central portion of the inside of the roller body to form a first heating area;
a second heater disposed inside the roller body and disposed on one side of the first heater to form a second heating area;
a third heater disposed inside the roller body and disposed on the other side of the first heater to form a third heating area;
a fourth heater disposed inside the roller body and provided in a shape surrounding the circumference of the second heater to compensate for the temperature of the second heating area;
a fifth heater disposed inside the roller body and provided in a shape surrounding the third heater to compensate for the temperature of the third heating area;
A heat conduction plate disposed between the inside of the roller body and the first, second, third, fourth, and fifth heaters to transfer heat emitted from the first, second, third, fourth, and fifth heaters to the roller body. ;and
Both ends of the heat conduction plate are closed by flanges, and insulation guide rings are provided outside the flanges to prevent heat emitted from the first, second, third, fourth, and fifth heaters from being lost to the inside of the roller body. A heating roller for manufacturing a secondary battery, characterized in that it further comprises.
According to claim 1,
The heating roller for manufacturing a secondary battery, characterized in that the first, second, and third heaters are far-infrared heaters.
According to claim 1,
The heating roller for manufacturing a secondary battery, further comprising first, second, and third temperature sensors for detecting temperatures of the first, second, and third heaters.
delete delete According to claim 1,
The heating roller for manufacturing a secondary battery, characterized in that it further comprises a cooling passage penetrating the adiabatic guide ring and the heat conduction plate to form a circulation path of a refrigerant.
According to claim 1,
The fourth heater and the fifth heater
A heating roller for manufacturing a secondary battery, characterized in that it is prepared by depositing a conductive paste on the inner circumferential surface of a cylindrical body made of any one of ceramic, alumina, and aluminum nitride using a silk screen technique.