JPS63114058A - Manufacture of plate for battery - Google Patents

Abstract

PURPOSE:To accurately, easily dry a coating material even if the amount of the coating material is varied by sending a signal of the coating material temperature in the outlet of a drying furnace to a temperature controller of the furnace, and controlling the furnace temperature to a setting temperature. CONSTITUTION:The temperature of a coating material 1 applied to a belt-like substrate 2 and dried in a drying furnace 7 is measured with a noncontact thermometer 10 in the outlet of the furnace 7. A power control thyristor 9 is feedback-controlled with a temperature controller 11 so that the temperature of the coating material 1 approaches a specified temperature. By controlling the heat value of a far infrared radiation heater 8 by the feedback control of the temperature of the coating material 1, the furnace temperature is controlled. Although the coating material 1 is dried in a drying process B, the temperature of the furnace 7 is controlled by the difference between the coating material temperature and a setting temperature, even if the amount of coating material 1 in the substrate 2 is varied, so that the drying state of the coating material 1 is kept constant.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method of manufacturing a battery electrode plate.

[Prior art] Conventional battery electrode plates are produced by applying a slurry or paste coating agent to the surface of a nickel-plated iron plate, placing it in a drying oven, and drying it inside the oven. This was done by drying the coating agent at a constant temperature.

[Problems to be Solved by the Invention] In the method for manufacturing battery electrode plates as described above, when the amount of the coating agent applied to the surface of the substrate changes, There was a problem in that the temperature inside the furnace had to be set one by one, making the work cumbersome. In addition, there are drying ovens that use far-infrared heaters as a heat source, but although they have good drying efficiency for coating materials, it is difficult to set the temperature inside the oven to a predetermined value. There was a problem.

An object of the present invention is to provide a method for manufacturing a battery electrode plate that allows accurate and easy drying of the coating agent even if the amount of the coating agent varies.

Means for Solving Problem 1] The present invention will be explained based on the embodiment shown in FIG. A coating process A in which the substrate 2 is made uniform by passing it through a slitter 6, and a coating agent 1 applied to the substrate 2 in the coating process A.
In the present invention, the drying step B includes a drying process B in which a signal from the temperature of the coating agent 1 at the outlet side of the drying oven 7 is sent to the drying oven 7. The temperature inside the drying oven 7 is controlled so that the temperature of the coating agent 1 matches the set temperature by supplying it to a temperature control device 12.

[Function] As described above, when the temperature control device 12 is operated by a signal based on the temperature of the coating material 1 and the temperature of the coating material 1 is controlled by the temperature control device 12 to match the set temperature, the temperature of the coating material 1 is controlled to match the set temperature. Even if the amount of the coating agent 1 applied to the surface of the coating material 2 changes, the coating agent 1 can be dried accurately and easily. In addition, the drying oven 7
Similarly, even if the far-infrared heater 8 is used as the heat source, the coating material 1 can be dried accurately and easily even if the amount of the coating material 1 changes.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to FIG.

FIG. 1 shows an apparatus for carrying out the manufacturing method of the present invention, and this manufacturing apparatus applies a slurry or paste coating agent 1 to a strip-shaped substrate 2 made of a nickel-plated iron plate.
The seed plate 3 for a battery is manufactured by applying the paste to the substrate and drying it. This manufacturing device has a vat 4 containing a coating material 1. A roller 5 for changing the direction of the strip-shaped substrate 2 is disposed within the vat 4, a slitter 6 is disposed above the vat 4, and a drying oven 7 is disposed further above the slitter 6. . A large number of far-infrared heaters 8 are arranged in parallel in the drying oven 7, and each far-infrared heater 8
are connected in parallel. These far-infrared heaters 8 are connected in series to a common power control silice unit 9. A non-contact thermometer 10 is arranged on the exit side of the drying oven 7. The non-contact thermometer 10 is connected to a power control thyristor unit 9 via a temperature controller 11.

The power control thyristor unit 9 and the temperature controller 11 constitute a temperature control device 12 for the drying oven 7. A pulling roller device 13 for pulling up the strip-shaped substrate 2 is arranged above the position where the non-contact thermometer 10 is arranged on the exit side of the drying oven 7. The pulling roller device 13 is composed of a driving roller 14, a driven roller 15 that clamps the strip substrate 2 together with the driving roller 14, and a pressing means 16 that presses the driven roller 15 against the strip substrate 2.
Next, an example of the method for manufacturing an electrode plate of the present invention using the above-mentioned electrode plate manufacturing apparatus will be explained. When the strip-shaped substrate 2 is dipped into the coating agent 1 housed in the vat 4 and moved upward through the rollers 5 within the coating agent 1, the coating is applied to both plate surfaces of the strip-shaped substrate 2. Agent 1 is applied. Next, when this strip-shaped substrate 2 with the coating agent is passed through a slitter 6, the thickness of the layer of the coating agent 1 is made uniform. In this way, the coating step A of coating the coating agent 1 on the strip-shaped substrate 2 is carried out. The coating process A
After the coating agent 1 is applied to the strip-shaped substrate 2, this coating agent 1
The strip-shaped substrate 2 with attached strips is introduced into a drying oven 7 and dried. The temperature of the coating agent 1 of the strip-shaped substrate 2 with the coating agent 1 on which the coating agent 1 has been dried in the drying oven 7 is measured using a non-contact thermometer 10 on the exit side of the drying oven 7.

The temperature of the coating agent 1 measured with the non-contact thermometer 10 is measured with the temperature controller 1.
1, the power control thyristor unit 9 is feedback-controlled (so-called PID control f) so that the temperature approaches the set temperature.
il). In this way, the coating material 1 for measuring the outlet of the drying oven 7
The humidity inside the drying oven 7 is controlled by controlling the amount of heat generated by each far-infrared heater 8 through feedback control of the humidity. In this way, drying step B is carried out,
Even if the amount of coating agent 1 on the strip-shaped substrate 2 with coating agent 1 changes, the temperature inside the drying oven 7 is controlled based on the difference in the coating agent 1 temperature on the sunrise side of the drying oven 7 from the set temperature. The dry state of agent 1 can be kept constant.

FIG. 2 is a diagram showing the temperature change of the coating agent 1 when the strip-shaped substrate 2 with the coating agent 1 is dried by the far-infrared heater 8 with a constant amount of heat generated. In this case, drying is occurring only in the X zone, and in the Y zone, drying has finished and the temperature of the coating material 1 increases rapidly and when it reaches approximately 300'C, the coating material 1 begins to burn. . Therefore, by setting the preset temperature of the coating material 1 to, for example, 250° C. when drying the coating material 1, a dry state is automatically ensured, and the slitter 6 is applied by changing the interval between them. Even when the thickness of the adhesive 1 is changed, there is no need to change the set temperature of the furnace one by one as in the conventional case, and the adhesive 1 is always kept in a good dry state.

FIGS. 3(a) and 3(b) show the variation in the thickness of the coating material 1 after the drying process by the conventional method and the variation in the thickness of the coating material 1 after the drying process by the method of the present invention, respectively. FIG. This variation in the thickness of the coating material 1 after drying is due to variation in the drying state. The variation in the thickness of the coating material 1 after B was investigated using 1000 samples. As a result, as shown in FIG. 3(a), the thickness of the coating agent 1 in the conventional method showed variations in the width of 681 to 760 μm and 80 μm, and as shown in FIG. In the method, the thickness of adhesive 1 is 721-740μ skin and 20μ
It can be seen that the variation in the layer thickness of the coating agent 1 obtained by the method of the present invention is smaller than that of the conventional method.

[Effects of the Invention] As described above, in the present invention, a signal based on the temperature of the coating material at the outlet side of the drying oven is supplied to the temperature control device of the drying oven, and the drying process is performed so that the temperature of the coating material matches the set temperature. Since the temperature inside the furnace is controlled, even if the amount of the coating agent applied to the surface of the substrate varies, the coating agent can be dried accurately and easily. Further, even if a far-infrared heater is used as the heat source of the drying oven, the amount of the coating agent can be varied and the coating agent can be dried accurately and easily.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of a manufacturing apparatus for carrying out the manufacturing method of the present invention, and FIG. 2 is a diagram showing the temperature change of the coating agent applied to the substrate to be dried by the manufacturing method of the present invention. , Figure 3 (
FIG. 3(a) is a diagram showing the variation in the thickness of the coating agent layer according to the conventional method, and FIG. 3(b) is a diagram showing the variation in the thickness of the coating agent layer according to the method of the present invention. 1. Painting agent, 2. Substrate, 6. Slitter, 7.
・・Drying oven, A: 1st coated culm, B: Drying process. Figure 1 Punishment

Claims (1)

[Scope of Claims] A coating step in which the thickness of the layer of the coating agent applied to the surface of the substrate is made uniform by passing the substrate through a slitter, and a coating agent applied to the substrate in the coating step. and a drying step of drying the coating agent, wherein the drying step includes transmitting a signal based on the temperature of the coating agent at the outlet side of the drying oven to a temperature control device of the drying oven. A method for manufacturing a battery electrode plate, characterized in that the temperature inside the drying oven is controlled so that the temperature of the coating agent matches a set temperature.