阅读说明：本技术 一种针对锂电池隔膜涂布烘箱的监测和调节方法 (Monitoring and adjusting method for lithium battery diaphragm coating oven ) 是由 袁海朝 李树信 徐锋 于 2019-08-30 设计创作，主要内容包括：本发明公开了一种针对锂电池隔膜涂布烘箱的监测和调节方法,在每节烘箱的进风风道中安装一个湿度仪和一个风速仪,在每节烘箱的排风风道中也安装一个湿度仪和一个风速仪,从而实时采集各节烘箱的进风风道的进风风速、进风相对湿度数据,以及各节烘箱的排风风道的排风风速、排风相对湿度数据；根据采集的数据计算出各节烘箱实际排出的水分以及各节烘箱的水分排出占比,并将其显示在屏幕上,进而帮助工作人员判断烘干是否合理,烘干趋势是否最优,进而通过调节合理分配各节烘箱烘干比例,达到更好的涂布效果,并减少能源浪费。还可通过最后一节烘箱的数据监测是否锂电池隔膜涂布已被烘干。(The invention discloses a monitoring and adjusting method for lithium battery diaphragm coating ovens, wherein a hygrograph and an anemoscope are arranged in an air inlet duct of each oven, and a hygrograph and an anemoscope are also arranged in an air exhaust duct of each oven, so that the air inlet speed and the air inlet relative humidity data of the air inlet duct of each oven and the air exhaust speed and the air exhaust relative humidity data of the air exhaust duct of each oven are acquired in real time; calculate the moisture that each section oven actually discharged and the moisture discharge of each section oven and account for the ratio according to the data of gathering to show it on the screen, and then help the staff to judge whether reasonable drying, whether the stoving trend is optimal, and then through adjusting each section oven stoving proportion of rational distribution, reach better coating effect, and reduce the energy waste. And monitoring whether the lithium battery diaphragm coating is dried or not through the data of the last section of the oven.)

1. A monitoring method for a lithium battery diaphragm coating oven is characterized by comprising the following steps: the whole oven channel comprises a plurality of sections of ovens, each section of oven is respectively provided with an air inlet channel, an air exhaust channel, a fan and a heating component, a hygrograph and an anemoscope are installed in the air inlet channel of each section of oven, and a hygrograph and an anemoscope are also installed in the air exhaust channel of each section of oven and are both connected to a controller, so that the air inlet speed and the air inlet relative humidity data of the air inlet channels of the ovens and the air exhaust speed and the air exhaust relative humidity data of the air exhaust channels of the ovens are acquired in real time;

using the collected data, the following calculations were performed:

the method comprises the following steps: calculating the moisture actually discharged by each section of oven, wherein the moisture actually discharged is the air exhaust speed multiplied by the air exhaust relative humidity, the air inlet speed multiplied by the air inlet relative humidity;

step two: adding the water phase actually discharged by each section of the oven to obtain the total water content actually discharged by the whole oven channel;

step three: the actual moisture discharged from each section of oven is divided into the actual total moisture discharged from the whole oven channel, and the moisture discharge ratio of each section of oven can be calculated.

2. The monitoring method for the lithium battery separator coating oven according to claim 1, characterized in that: and displaying the calculated water actually discharged by each section of the oven and the water discharge ratio of each section of the oven on a screen.

3. The monitoring method for the lithium battery separator coating oven according to claim 1, characterized in that: and judging whether the lithium battery diaphragm coating is dried or not according to the monitoring data of the last section of the drying oven.

4. The monitoring method for the lithium battery separator coating oven according to claim 1, characterized in that: the moisture meter and the anemoscope are arranged at the air inlet junction and the air exhaust junction of each section of the oven.

5. The monitoring method for the lithium battery separator coating oven according to claim 1, characterized in that: adopts a high temperature resistant, high precision, rust-proof moisture meter and an anemoscope.

6. A method for adjusting a lithium battery diaphragm coating oven is characterized by comprising the following steps: judging whether the drying trend is reasonable according to the actually discharged moisture of each section of the drying oven and the moisture discharge proportion information of each section of the drying oven obtained according to the claim 1, and further adjusting the heating temperature and/or the running speed of the fan of each section of the drying oven to enable the drying trend to meet the production requirement.

Technical Field

The invention belongs to the technical field of monitoring and analysis, and particularly relates to a monitoring and adjusting method for a lithium battery diaphragm coating oven.

Background

The drying of the coating is a crucial link in the lithium battery diaphragm coating process, and the drying effect directly influences the characteristics of the diaphragm, the implementation of subsequent processes and the improvement of the battery quality. In industry, the drying oven is adopted to dry the coating of the water-based lithium battery diaphragm, the length of the whole drying oven channel is generally 15-25 m, even longer, and the whole drying oven channel is formed by sequentially arranging a plurality of drying ovens. At present, the existing oven adjusting mode basically adopts a blind adjusting method, and can be adjusted to a relatively proper parameter through a plurality of field tests, so that the adjustment is time-consuming, labor-consuming and material-consuming; moreover, once the coating ingredients of the lithium battery diaphragm to be dried are changed (the water content is changed) and the environmental temperature and humidity (mainly related to seasonal weather) are greatly changed, the drying effect is greatly influenced, so that the parameters of each section of drying oven need to be adjusted again. Moreover, current oven adjustment mode, the stoving parameter of each section oven is reasonable inadequately, and several sections ovens excessively dry before appearing easily, and the extravagant problem of several sections oven stoving in back, how reasonable stoving parameters such as the heating temperature and the amount of wind of adjusting each section oven, guarantee good stoving effect and optimal energy consumption, are the problem that a lot of urgent waited to solve.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a monitoring and adjusting method for a lithium battery diaphragm coating oven, which can help workers judge whether drying is reasonable or not and whether the drying trend is optimal or not, further achieves a better coating effect by reasonably distributing the drying proportion of each section of oven through adjustment, and reduces energy waste.

The invention is realized by the following technical scheme:

a monitoring method for a lithium battery diaphragm coating oven is characterized in that the whole oven channel comprises a plurality of sections of ovens, each section of oven is respectively provided with an air inlet channel, an air exhaust channel, a fan and a heating component, a humidity meter and an anemoscope are installed in the air inlet channel of each section of oven, a humidity meter and an anemoscope are also installed in the air exhaust channel of each section of oven, and the humidity meter and the anemoscope are both connected to a controller, so that the air inlet speed and the air inlet relative humidity data of the air inlet channel of each section of oven and the air exhaust speed and the air exhaust relative humidity data of the air exhaust channel of each section of oven are acquired in real time;

using the collected data, the following calculations were performed:

the method comprises the following steps: calculating the moisture actually discharged by each section of oven, wherein the moisture actually discharged is the air exhaust speed multiplied by the air exhaust relative humidity, the air inlet speed multiplied by the air inlet relative humidity;

step two: adding the water phase actually discharged by each section of the oven to obtain the total water content actually discharged by the whole oven channel;

step three: the actual moisture discharged from each section of oven is divided into the actual total moisture discharged from the whole oven channel, and the moisture discharge ratio of each section of oven can be calculated.

In the technical scheme, the calculated water actually discharged by each section of the oven and the water discharge proportion of each section of the oven are displayed on a screen.

In the technical scheme, whether the lithium battery diaphragm coating is dried or not is judged according to the monitoring data of the last section of the drying oven.

In the technical scheme, the moisture meter and the anemoscope are arranged at the air inlet junction and the air exhaust junction of each section of the oven.

In the technical scheme, a high-temperature-resistant, high-precision and anti-rusting humidity instrument and an anemoscope are adopted.

A method for adjusting a lithium battery diaphragm coating oven judges whether the drying trend is reasonable or not according to the obtained actually discharged moisture of each oven and the moisture discharge proportion information of each oven, and then adjusts the heating temperature and/or the fan running speed of each oven to enable the drying trend to meet the production requirements.

The invention has the advantages and beneficial effects that:

the invention mainly aims at the coating of the water system diaphragm, monitors the humidity and the air speed in the air channel of each section of oven by a humidity meter and an air speed meter, calculates the water actually discharged by each section of oven and the water discharge proportion of each section of oven, displays the water discharge proportion on a screen, and can help workers judge whether the drying is reasonable and the drying trend is optimal by the displayed real-time monitoring data, thereby achieving better coating effect and reducing energy waste by adjusting and reasonably distributing the drying proportion of each section of oven. And monitoring whether the lithium battery diaphragm coating is dried or not through the data of the last section of the oven.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.

A monitoring method for a lithium battery diaphragm coating oven aims at a water system coating oven (water system coating aims at moisture drying), the whole oven channel comprises a plurality of sections of ovens, each section of oven is respectively provided with an air inlet duct, an air exhaust duct, a fan and a heating component, a hygrograph and an anemoscope are arranged in the air inlet duct of each section of oven, a hygrograph and an anemoscope are also arranged in the air exhaust duct of each section of oven, and the hygrograph and the anemoscope are both connected to a controller, so that the air inlet speed and the air inlet relative humidity data of the air inlet duct of each section of oven and the air exhaust speed and the air exhaust relative humidity data of the air exhaust duct of each section of oven are collected in real time. The installation requirements of the moisture meter and the anemometer are as follows:

1. in order to reduce calculation, the air inlet and the air outlet are required to be arranged at the air inlet junction and the air outlet junction of each section of oven;

2. in order to reduce inaccurate data caused by humidity and wind speed attenuation, the installation position of the instrument is as close to the oven as possible;

3, in order to facilitate later-stage inspection and calibration, the sealing device is easy to disassemble and assemble and ensures the sealing property;

4, adopting a high-temperature resistant, high-precision and anti-rusting humidity instrument and an anemoscope.

Using the collected data, the following calculations were performed:

the method comprises the following steps: calculating the actually discharged moisture of each oven, wherein the actually discharged moisture is the discharged moisture of the monitored air exhaust duct-the inlet moisture of the monitored air inlet duct, namely the actually discharged moisture is the air exhaust speed multiplied by the air exhaust relative humidity-the air inlet speed multiplied by the air inlet relative humidity;

step two: adding the water phase actually discharged by each section of the oven to obtain the total water content actually discharged by the whole oven channel;

step three: the actual moisture discharged from each section of oven is divided into the actual total moisture discharged from the whole oven channel, and the moisture discharge ratio of each section of oven can be calculated.

The calculated data can be displayed on a screen by writing the program into a controller (such as a PLC, a microcontroller and a PC) in the above calculation mode, so that a worker can intuitively know the water actually discharged by each section of the drying oven and the water discharge proportion of each section of the drying oven in real time. Through the real-time monitoring data displayed above, the working personnel can be helped to judge whether the drying is reasonable or not, whether the drying trend is optimal or not, and then the drying proportion of each section of drying oven is reasonably distributed through adjustment, so that the energy waste is reduced. During adjustment, the staff adjusts the heating temperature and/or the fan operating speed of each section of oven, can adjust the actual discharged moisture content and the moisture discharge proportion of each section of oven, and what kind of stoving trend (that is each section of oven moisture discharge proportion) of adjusting to is decided according to actual need, preferably from the pan feeding to the trend of the ejection of compact direction degressive step by step. And further, whether the lithium battery diaphragm coating is dried or not can be monitored through data of the last oven, namely the lithium battery diaphragm coating is judged to be dried when the actually discharged water of the last oven is zero or approximately zero.

It should be noted that the cross-sectional areas of the air intake duct and the air exhaust duct are the same, and therefore, the cross-sectional areas can be ignored in the above calculation process.

It should be noted that the above calculation process is real-time, and the obtained real-time data of each section of oven is real-time data, that is, the controller acquires the detection data of each humidity meter and each anemometer according to the set sampling period, so as to ensure the real-time performance.

For example, when the product is not dried before being discharged from the oven, the drying purpose can be achieved by increasing the temperature or adjusting the air volume. In order to reduce the waste of products, the temperature and the air quantity are usually adjusted according to the previous experience, although the drying purpose can be achieved, and in order to reduce the waste of the diaphragm and the slurry caused by non-drying, the adjustment quantity is usually larger, and the waste of energy is easily caused. At the moment, the data monitored by the invention can be used for knowing which section of the drying oven is low in drying amount, namely the temperature and the air volume of a single section of the drying oven can be regulated, and whether the air speed is low or the humidity is low can be known through independent humidity and air volume data and independently regulated. And aiming at drying cracks, which section of oven is dried can be compared through the air inlet humidity and the air exhaust humidity.

The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.