Therefore, the activation process of thermal batteries can be divided into three stages: (i) the ignition process of the electrical match; (ii) the combustion process of heat pellets; (iii) the processes of the heat of pellets being transferred to the electrolytes and the temperature of electrolytes reaching the melting point [ 23 ].
In the topic "Production Technology for Batteries", we focus on procedures, processes, and technologies and their use in the manufacture of energy storage systems. The aim is to increase the safety, quality and performance of batteries - while at the same time optimizing production technology.
The thermal battery model is composed of an electrical match, fifteen unit-cells, sixteen heat pellets, three heat insulators, a case and a cover. The unit cell consists of the anode, electrolyte and cathode. In order to simplify calculation, the unit cell is modeled as a whole [ 22 ].
Traditional thermal battery development usually adopts the experimental method. Fortunately, with the development of computer technology, simulation and optimization have become the mainstream ways to improve the design efficiency and quality of thermal batteries.
A new heat source model considering ignition time interval of heat pellets is established. Based on it, the battery simulation model of activation stage is developed, and the simulation results are more accurate than the traditional simulation without considering the ignition time interval. The simulation results are well verified by experiments.
The highest temperature of the thermal battery occurs at the top and bottom pellet. It can be explained that the pellets at top and bottom are connected with the unit cell on one side and with the insulation on the other side. Compared to other pellets, they have slower heat dissipation rate and higher temperature.
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