文章设计一种新能源汽车高压 PTC 控制系统，其控制电路处于高压侧，对控制系统通信电路中的 CAN 电路进行隔离。该控制系统具有下电保持功能，此功能可用于 PTC 的故障处理，控制系统通过硬件和软件两方面实现过压、欠压和过流保护功能。该控制系统将功率电路一分为二，在降低瞬态冲击电流的同时提高功率器件可靠程度。

The article designs a high-voltage PTC control system for new energy vehicles. Its control circuit is on the high-voltage side and isolates the CAN circuit from the communication circuit of the control system. This control system has a power-off holding function，which can be used for PTC fault handling. The control system realizes overvoltage,undervoltage，and overcurrent protection functions through both hardware and software. The control system divides the power circuit into two，which improves the reliability of the power device while reducing the transient inrush current. Verified by the simulated vehicle test.