CN-122015204-A - CO2 cold and hot combined supply energy-saving dehumidifier unit for lithium battery

CN122015204ACN 122015204 ACN122015204 ACN 122015204ACN-122015204-A

Abstract

The invention relates to the field of dehumidifiers, which is used for solving the problems that the traditional scheme lacks dynamic perception and fault pre-judgment and is difficult to adapt to dynamic workshop load fluctuation, in particular to a CO2 cold and hot combined energy-saving dehumidifier unit for lithium batteries, which realizes advanced perception and quantitative evaluation on production environment load change by constructing a workshop air dynamic curve and carrying out dynamic tracking analysis, ensures high-precision stability of temperature and humidity environment required by lithium battery production, and finally, the fluctuation characteristics of the workshop air dynamics are analyzed and are associated and matched with workshop production activities, and the fluctuation trend of air parameters in a specific future period is predicted, so that the control system has feedforward regulation capability.

Inventors

WANG WUJUN
Ying Jifei
HU LEI

Assignees

安徽华铂再生资源科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260313

Claims (9)

1. The CO2 cold and hot combined supply energy-saving dehumidifier unit for the lithium battery is characterized by comprising a dehumidifier unit main body (1), wherein a control center (5) is arranged on the dehumidifier unit main body (1), a control panel (4) is arranged on the control center (5), and an air inlet (3) and an air outlet (2) are respectively connected to the side surface of the dehumidifier unit main body (1); The control center (5) also comprises an energy-saving dehumidifier control system; the energy-saving dehumidifier control system comprises an environment sensing module, a dynamic sensing module, a circulating dehumidification control module, a fault diagnosis protection module and an interaction management module; the environment sensing module can sense the air environment in the lithium battery workshop and acquire air parameters; The dynamic sensing module continuously records the air parameters, dynamically analyzes the air parameters according to the recorded air parameters to obtain a workshop air dynamic curve, dynamically tracks and analyzes the workshop air dynamic curve to generate a dynamic evaluation result; The circulating dehumidification control module performs quantitative analysis according to the air parameters, generates a dehumidification control signal based on a quantitative analysis result, and controls the dehumidification unit through the control center (5); The fault diagnosis protection module performs correlation analysis on the air dynamic evaluation result after the dehumidification control signal is executed to obtain dehumidification implementation efficiency, performs quantitative analysis according to the dehumidification implementation efficiency and outputs a fault diagnosis early warning signal; The interaction management module is used for controlling the interaction function of the center.
2. The CO2 combined cooling and heating energy-saving dehumidifier unit for lithium batteries according to claim 1, wherein the air parameters collected by the environment sensing module comprise air temperature and air relative humidity of a plurality of preset monitoring points in a workshop.
3. The CO2 combined cooling and heating energy-saving dehumidifier unit for lithium batteries according to claim 1, wherein the method for acquiring the workshop air dynamic curve by the dynamic sensing module is as follows: continuously recording air parameters and constructing a time sequence data set according to a preset sampling period; And (3) performing curve trend fitting on the temperature and humidity data in the time sequence data set to generate a workshop air dynamic curve.
4. The CO2 combined cooling and heating energy-saving dehumidifier unit for lithium batteries according to claim 1, wherein the method for dynamic tracking analysis by the dynamic sensing module is as follows: Carrying out mathematical calculation on the workshop air dynamic curve to obtain a temperature and humidity change rate curve; And comparing the temperature and humidity change rate curve with a preset quasi-change rate threshold library to generate various abnormal evaluation results.
5. The CO2 combined cooling and heating energy-saving dehumidifier unit for lithium batteries according to claim 1, wherein the process of quantitative analysis by the circulating dehumidification control module is as follows: S1, calculating the current absolute moisture content according to the temperature and humidity value in the current air parameter; S2, comparing the current absolute moisture content with a standard moisture content range required by a lithium battery production process to obtain a moisture content deviation value; S3, calculating and obtaining a solution circulation quantity adjusting instruction, a regeneration heating power adjusting instruction and a compressor frequency adjusting instruction of a CO2 refrigeration cycle system of a solution dehumidification system in the dehumidification unit based on the moisture content deviation value; and S4, integrating the adjusting instruction into a dehumidification control signal.
6. The CO2 combined cooling and heating energy-saving dehumidifier unit for lithium batteries according to claim 5, wherein the cyclic dehumidification control module further introduces seasonal pattern factors and CO2 concentration data when calculating the adjustment command; the seasonal mode factors are determined according to outdoor weather parameters and used for switching the operation logic of refrigeration, heating or heat recovery priority; And the coefficient of performance of the system is corrected by combining the CO2 concentration data, so that the frequency adjusting instruction of the compressor is optimized, and the high-efficiency and safe operation of the system under the transcritical cycle is ensured.
7. The CO2 combined cooling and heating energy-saving dehumidifier unit for lithium batteries according to claim 1, wherein the process of performing the association analysis by the fault diagnosis protection module comprises the following steps: after the dehumidification control signal is executed, acquiring a workshop air dynamic curve of a first time period newly generated by the dynamic sensing module; Comparing and analyzing the workshop air dynamic curve of the first time period with the workshop air dynamic curve of the second time period before the dehumidification control signal is executed, and calculating the ratio of the actual moisture content reduction value to the expected reduction value in unit time to obtain dehumidification implementation efficiency; And establishing a multidimensional characteristic vector containing dehumidification implementation efficiency, key component operation current and vibration data.
8. The CO2 combined cooling and heating energy-saving dehumidifier unit for lithium batteries according to claim 1, wherein the fault diagnosis protection module performs quantitative analysis according to dehumidification implementation efficiency, and the process of outputting a fault diagnosis early warning signal comprises the following steps: When the dehumidification implementation efficiency is continuously lower than a first preset efficiency threshold, generating a primary early warning signal of the reduced efficiency of the solution dehumidification system; When the dehumidification implementation efficiency is lower than a second preset efficiency threshold value which is lower, and a specific mode is identified by combining multidimensional feature vector analysis, a positioning early warning signal corresponding to a specific fault component is generated, wherein the specific fault component comprises a solution pump, a regenerative heater or a CO2 compressor; the early warning signal at least comprises a fault grade, suspected fault components and suggested troubleshooting measures.
9. The CO2 combined cooling and heating energy-saving dehumidifier unit for the lithium battery according to claim 1, wherein the dynamic sensing module is further used for dynamically analyzing a workshop air dynamic curve; Extracting periodic fluctuation characteristics in the dynamic curve; the periodic fluctuation characteristics are matched with the known production activities or equipment start-stop time in the workshop in a time-correlated manner; based on the matching result, predicting the air parameter fluctuation trend in a specific future period, and inputting the predicted trend into the circulating dehumidification control module in advance.

Description

CO2 cold and hot combined supply energy-saving dehumidifier unit for lithium battery Technical Field The invention relates to the field of dehumidifiers, in particular to a CO2 cold and hot combined supply energy-saving dehumidifier unit for lithium batteries. Background Along with the increasing precision of the lithium ion battery manufacturing process, the production environment has extremely strict requirements on the control of air temperature and humidity, the high-precision constant temperature and humidity environment is a necessary condition for guaranteeing the consistency of the yields of key processes such as electrode coating, drying and liquid injection and the like and the battery, conventionally, the environment control mostly adopts an independent air treatment scheme of freezing dehumidification and electric reheating or rotating wheel dehumidification, the former needs a large amount of electric energy reheating to meet the requirement of air supply temperature, obvious cold and heat offset exists, the energy efficiency is extremely low, the latter can deeply dehumidify, but the energy consumption is large, and rotating wheel equipment is huge in volume and complex in operation and maintenance. In order to improve energy efficiency, a scheme of combining a heat pump with solution dehumidification or rotating wheel dehumidification exists, condensation heat of the heat pump is utilized to provide heat for regeneration of a dehumidifier, and the system adopts a conventional Freon refrigerant, so that the problems of efficiency attenuation, environmental protection and the like exist under a high-temperature regeneration working condition, and in recent years, natural working medium CO2 is paid attention to due to the extremely low GWP value, excellent high-temperature heat pump performance and the characteristic of being capable of producing high-temperature hot water in a transcritical cycle, and research has been put forward for coupling the heat pump with dehumidification. However, the conventional application scheme is mostly in a principle or simple integrated level, lacks of deep combination with dynamic, changeable and high-precision environment requirements of a lithium battery production workshop, a control system of the system often adopts simple PID control based on fixed point feedback, cannot effectively cope with complex load fluctuation of the workshop caused by production beats, equipment start and stop, personnel activities and seasonal changes, and is difficult to consider both control precision and energy efficiency, and meanwhile, the running state of the system lacks of intelligent perception and fault prejudging capability, has delayed response to the problems of dehumidification efficiency reduction, key component performance decline and the like, and influences the stability of the production environment and the running reliability of the equipment. Therefore, a high-efficiency dehumidifier unit capable of deeply integrating advanced thermodynamic cycle and intelligent control technology and having self-adaptive dynamic regulation, high-efficiency energy management and intelligent diagnosis and early warning capabilities is needed to meet the increasing energy-saving, accurate and reliable requirements of lithium battery industry on production environment control, and a solution is provided. Disclosure of Invention The invention realizes advanced perception and quantitative evaluation of production environment load change by constructing a workshop air dynamic curve and carrying out dynamic tracking analysis, ensures high precision and stability of a temperature and humidity environment required by lithium battery production, carries out correlation analysis on the execution effect of dehumidification and air dynamic change, carries out quantitative evaluation on the system health state, and therefore generates a positioning early warning signal in a grading manner, realizes active predictive maintenance, improves the reliability and stability of the operation of the whole dehumidifier unit, and finally predicts the fluctuation trend of air parameters in a specific future period by analyzing the fluctuation characteristic of workshop air dynamic and carrying out correlation matching with workshop production activity, so that a control system has feedforward regulation capability to solve the problems that the traditional scheme lacks dynamic perception and fault prejudgment and is difficult to adapt to dynamic workshop load fluctuation. The CO2 cold and hot combined energy-saving dehumidifier unit for the lithium battery comprises a dehumidifier unit main body, wherein a control center is arranged on the dehumidifier unit main body, a control panel is arranged on the control center, and the side surface of the dehumidifier unit main body is also respectively connected with an air inlet and an air outlet; The control center also comprises an energy-saving dehumidifier