The trend for power batteries is towards high density, high capacity and high voltage, which correspond to the three main customer needs of performance, range and fast charge respectively. This means that as many cell modules as possible can be installed in the limited space of the battery housing, and sufficient space for cooling systems needs to be reserved inside the housing. Therefore, the trend in the machining of battery housings is towards thin-walled, complex and lightweight, with suitable milling processes to meet the requirements.

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