The battery cell is a key energy storage component of new energy vehicles, which directly affects the vehicle's range, performance, and the development of sustainable energy. With the continuous advancement of battery technology, the performance and energy density of battery cells will continue to improve, promoting the development and popularization of new energy vehicles.
The application of
RFID technology in battery cell production can provide benefits such as automated traceability and management, reduced human errors, improved production efficiency, quality control and traceability, as well as data analysis and optimization, thereby promoting the intelligence and efficiency of battery cell production.
The production process of battery cells usually includes the following steps:
Preparation of electrode materials: This step involves preparing electrode materials for the positive and negative electrodes. Electrode materials are usually slurries made by mixing active substances and conductive agents, which need to be proportioned and mixed according to battery design requirements. During the preparation process of electrode materials,
RFID tags can be used to identify and track different materials. Each material can be accompanied by an
RFID tag that records its relevant information, such as supplier, batch number, production date, etc. This can achieve material traceability and management.
Electrode production: In the electrode production process, electrode materials are coated onto conductive foils. This includes steps such as coating, drying, and curing to form electrode sheets for the positive and negative electrodes. In the electrode production process, each electrode sheet can be attached with an
RFID tag to record its manufacturing information and quality parameters. Through
RFID technology, electrode traceability and consistency management can be achieved, and key data can be monitored and recorded in real-time during the production process.
Diaphragm preparation: A separator is usually required between the positive and negative electrodes in the battery cell for electrical isolation. At this stage, the diaphragm is prepared and cut into appropriate sizes. Identifying the diaphragm with
RFID tags can achieve tracking and management of the diaphragm. By using
RFID recognition devices, information about the diaphragm, such as type, size, and supplier, can be recorded.
Cell assembly: In the cell assembly process, the positive electrode, negative electrode, and separator are stacked and wound according to design requirements. The electrode rolls are stacked by a winding mechanism and separated from the separator to form the structure of the battery cell. By combining
RFID technology with sensors, key parameters such as temperature, pressure, and position during the assembly process of battery cells can be monitored in real time and associated with
RFID tags. This can achieve real-time control and recording of the battery cell assembly process to ensure the accuracy and consistency of the assembly process.
Liquid injection and sealing: The assembled battery cell needs to be filled with liquid, usually by injecting electrolyte into the cell. Afterwards, the battery cells need to be sealed to ensure that the electrolyte does not leak. During the injection and sealing process,
RFID tags can be attached to each battery cell to record relevant information about the injection and sealing, such as injection time, sealing process parameters, etc. Through
RFID readers, the injection and sealing process of each battery cell can be tracked, ensuring quality control and traceability.
Cell welding: Welding is the process of connecting a cell to a connector, which can be used to connect the cell to other components such as a battery management system (BMS).
RFID tags can be attached to each battery cell and connector to record welding information, such as welding time, welding quality, etc. Through
RFID technology, the welding process between battery cells and connecting pieces can be tracked, providing traceability and recording of welding quality.
Finished product inspection and testing: Conduct finished product inspection and testing in the final stage of battery cell production. This includes visual inspection, size measurement, internal resistance testing, and capacity testing of the battery cells. During the finished product inspection and testing phase,
RFID tags can be attached to each battery cell to record test results, production batches, and other relevant information. Through
RFID technology, each battery cell can be quickly identified and tracked, and test data can be associated with it to achieve product quality traceability and automated data management.
In summary, by combining with
RFID identification technology, real-time monitoring, traceability, and automation control of the battery cell production process can be achieved. In addition, by combining
RFID technology with other sensors, real-time monitoring and control of process parameters can be achieved, improving production efficiency and quality stability. Overall, the application of
RFID technology can enhance the visibility, controllability, and automation level of battery cell production.
