Measures to ensure dimensional stability during energy storage pack shell processing
Release Time : 2025-05-06
In the manufacturing of energy storage pack shell processing, dimensional stability directly affects the quality and performance of the product. If the size deviates, it will not only cause the energy storage pack shell to be unable to accurately fit the internal battery cells and other components, but may also bury safety hazards. Therefore, it is crucial to take effective safeguards to ensure the dimensional stability during processing.
Material is the primary factor affecting the dimensional stability of the energy storage pack shell. In the material selection stage, materials with stable mechanical properties and low thermal expansion coefficients should be given priority. For example, aluminum alloy has the characteristics of low density, high strength and relatively low thermal expansion coefficient. It is one of the commonly used materials for energy storage pack shells, but the performance of aluminum alloys of different grades is different. It should be accurately selected according to the processing technology and use requirements. At the same time, it is necessary to strengthen the quality inspection of raw materials, including component analysis, mechanical property testing, etc., to ensure that all indicators of the materials meet the standards. For the purchased plates or profiles, it is also necessary to check their flatness, thickness tolerance, etc. to avoid the defects of the material itself affecting the stability of the subsequent processing dimensions.
The accuracy of the processing equipment directly determines the dimensional accuracy of the energy storage pack shell. Regular calibration and maintenance of the processing equipment is the key to ensuring dimensional stability. For example, after a long period of use, the guide rails, screws and other components of CNC machining machines will wear out, resulting in a decrease in machining accuracy. Therefore, it is necessary to regularly check and adjust the geometric accuracy of the machine tool in accordance with the equipment maintenance procedures, and use high-precision measuring instruments such as laser interferometers to detect and compensate for the positioning accuracy and repeat positioning accuracy of the machine tool. For stamping, die-casting and other equipment, it is necessary to check the wear of the mold, replace the severely worn mold parts in time, ensure the accuracy of the mold size, and thus ensure the stability of the size of the processed energy storage package shell.
Reasonable processing parameters are an important means to control dimensional stability. During the cutting process, the selection of parameters such as cutting speed, feed rate and cutting depth directly affects the deformation of the workpiece. Excessive cutting speed will generate a lot of cutting heat, resulting in thermal deformation of the workpiece; excessive feed rate and cutting depth will increase the cutting force, causing elastic and plastic deformation of the workpiece. Therefore, it is necessary to determine the optimal processing parameters through process tests and data analysis, combined with material properties and equipment performance. For example, when processing the shell of an aluminum alloy energy storage package, using a smaller cutting depth and feed rate, appropriately increasing the cutting speed, and using cutting fluid for cooling and lubrication can effectively reduce thermal deformation and cutting force deformation during processing and ensure dimensional stability.
The processing environment has an important influence on the dimensional stability of the energy storage package shell. Environmental factors such as temperature, humidity, and vibration will cause slight changes in workpieces and equipment, which in turn affect the processing size. In terms of temperature, the temperature of the processing workshop should be controlled within a certain range to avoid thermal expansion and contraction of materials due to temperature fluctuations. For example, precision processing workshops are usually equipped with a constant temperature system to control temperature fluctuations within ±1°C. For humidity control, dehumidification equipment can be installed to keep the relative humidity in the workshop stable to prevent the material from being deformed by moisture. At the same time, the vibration source in the workshop should be minimized, the equipment should be treated with vibration isolation, and vibration should be avoided to affect the processing accuracy and ensure dimensional stability.
The skill level and degree of operation standardization of the operator are directly related to the stability of the processing process. Enterprises should strengthen the training of operators to make them familiar with the performance and operation methods of processing equipment and master the correct processing process parameter settings and adjustment techniques. Formulate detailed operating specifications and process flows, and require operators to strictly follow the specifications. For example, when clamping the workpiece, ensure that the clamping position is accurate and the clamping force is appropriate to avoid deformation of the workpiece due to improper clamping. At the same time, encourage operators to conduct self-inspections during the processing process, promptly discover dimensional deviations and make adjustments, and ensure the stability of energy storage pack shell processing dimensions from the human operation level.
Establishing a comprehensive detection system is an important part of ensuring dimensional stability. During the processing process, a combination of online and offline detection is adopted. Online detection can use the machine tool's own measurement system or the sensor installed on the processing equipment to monitor the processing dimensions of the workpiece in real time. Once the dimensional deviation is found to exceed the allowable range, the processing parameters are automatically adjusted or the machine is stopped for correction. Offline detection uses high-precision measuring equipment such as three-coordinate measuring machines and image measuring machines to conduct comprehensive inspections of the workpiece after the key process is completed, record dimensional data and analyze it. Through statistical analysis of the detection data, potential problems in the processing process can be discovered in a timely manner, and the processing technology and equipment parameters can be optimized and adjusted to achieve dynamic monitoring of dimensional stability.
With the development of intelligent manufacturing technology, the introduction of intelligent processing technology is an effective way to improve the dimensional stability of the energy storage pack shell. For example, by using digital twin technology, the processing process is simulated in a virtual environment, possible dimensional deviations and deformation problems are predicted in advance, and the processing technology and parameters are optimized. At the same time, an intelligent processing system is used to collect various data in the processing process in real time through sensors, and the data is analyzed and processed in combination with artificial intelligence algorithms, and the operating status of the processing equipment is automatically adjusted to achieve adaptive control of the processing process. The application of intelligent processing technology can control the processing process more accurately and effectively improve the dimensional stability and processing quality of energy storage pack shell processing.