Currently, most charging strategies primarily focus on CT and charging losses (CL), overlooking the crucial influence of battery temperature on battery life.
What is a constant temperature-constant voltage (CT-CV) charging method?
Currently, most charging strategies primarily focus on CT and charging losses (CL), overlooking the crucial influence of battery temperature on battery life. Therefore, this study proposes a constant temperature–constant voltage (CT-CV) charging method based on minimizing energy losses. The charging process is primarily divided into three stages.
Impacts of battery temperatures on model parameters are experimentally identified. Number of charging stages and the associated transition conditions are adaptive. A trade-off between charging time and battery aging at low temperatures is achieved. Accumulative performances of existing charging methods are comparatively studied.
The charging current is dynamically adjusted in response to the battery temperature, which indirectly reflects its aging and thermal environment. As per experimental results, the proposed method achieves 20% faster charging with the same total temperature rise as constant-current constant-voltage (CC-CV) technique.
What factors should be considered in designing the battery charging process?
Thus, the battery charging time, energy loss, and temperature rises are important factors to be considered in designing the battery charging process. Conventional methods used for battery charging can be divided into constant current (CC) strategy, constant voltage (CV) strategy and Mas Law strategy [9,10].
Constant-voltage charging is another conventional battery charging technique. The charging characteristic curve of this technique is illustrated in Fig. 4a. In this method, the battery voltage remains constant while the battery current is decreasing and eventually becomes very low.
Under and over discharge protection, setting of the battery voltage and current profiles, and implementing battery charging control techniques can be achieved by using an appropriate control system. Conventional configurations for battery charging circuits, explained before, can be used for the battery charger. Inductive contactless charger scheme