What are the measures to improve the disposable battery?

1. Process measures, the battery company controls the consistency of various raw materials; monitors the rheology of the slurry, does not leave the slurry for a long time to ensure that the rheology of the slurry is the same during coating; monitors the coating parameters, especially It is a lithium iron phosphate slurry. Because the lithium iron phosphate particles are relatively fine and the production performance of the slurry is poor, attention should be paid to slow down the coating machine during coating; reasonable detection of slurry viscosity; visual inspection of pole pieces; Eliminate defective pole pieces; weigh pole pieces; comparison of battery quality before and after injection; forming temperature; humidity control; formulating standards for various raw materials, inspecting and storing raw materials in strict accordance with the standards; regulating the consistency of processing technology; Fine control the consistency of the processing technology; strict statistical process control (SPC) of the process; ensure that each process is within the specified tolerance range; ensure the process capability index to follow the normal processing parameter distribution law. 2. Measures in the assembly process to ensure that the battery pack uses batteries of uniform specifications and models, to ensure the quality of the battery, especially the consistency of the initial voltage, the selection conditions: voltage; internal resistance; battery formation data; there are many consistency evaluation methods. The most commonly used at present is the range coefficient method, the standard deviation coefficient method and the threshold method. Combining cluster analysis, using the shape, distance, and area of u200bu200bthe battery charge-discharge curve formed by each detection point within a time interval for scientific classification, so as to determine the consistency of the battery. On the basis of capacity or voltage threshold, the shape of the charge and discharge curve, the distance between the curves, and the area around the curve are calculated, and the parameters that can reflect the consistency of the curve are selected for judgment. In the process of matching charging and discharging, the curves are closer, the relative distance is small, the area enclosed by the curve is small, and the cells with small differences between groups are grouped, so as to achieve the optimal consistent grouping. 3. Battery balance management. From the perspective of the battery management system, the battery parameters are detected during the battery pack use process, especially the voltage distribution during the stop or driving of the electric vehicle, and the inconsistency development law of the single cells in the battery pack is mastered, and the extreme The parameter battery is adjusted or replaced in time to ensure that the inconsistency of the battery pack parameters does not increase with the use time. Prevent the battery from overcharging and try to prevent the battery from deep discharge. Ensure a good use environment for the battery pack, try to ensure a constant temperature, reduce vibration, and ensure that water, dust, etc. pollute the battery pole. At the same time, from the energy management and strategy, the practical battery pack energy management and balancing system is introduced, and a reasonable battery balancing strategy is formulated to actively intervene and reduce the inconsistency of the battery. 4. Battery thermal management. During battery use, the difference in internal resistance, battery layout and other factors will cause differences in its own temperature and ambient temperature during the charging and discharging process, which will directly lead to differences in its output performance. The purpose of battery thermal management is to keep the operating temperature of the battery pack within the optimal operating temperature range of the battery. Ensure the consistency of the temperature conditions between the batteries, thereby ensuring the consistency of the battery parameters. (Batteries have different lifespans in different temperature states, and the degradation rate is doubled for every 10°C increase in temperature) 5. In terms of energy management, the control strategy, when the output power allows, minimize the depth of battery discharge. The consistency of lithium batteries under deep discharge conditions deteriorates, and the life of the battery pack will also be reduced. Try to prevent the battery from deep discharge and at the same time prevent the battery from overcharging. Equipped with a balance circuit in the system, it can prevent overcharging of individual batteries, appropriately reduce the charge termination voltage, and extend the cycle life of the battery pack. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it.