在贵州山地多雨高湿、低温颠簸等工况条件下，新能源汽车电器系统普遍存在的高压绝缘失效风险高、电池管理系统（Battery Management System，BMS）控制精度低、故障诊断效率差等问题，结合区域产业发展需求，从高压电器系统耐候性集成、BMS 多工况适配、车载网络与故障诊断优化等维度开展专项设计。通过高压配电盒 IP67 级密封结构优化、BMS 自适应均衡控制算法创新、CAN FD 总线抗干扰设计，配套“虚拟仿真 - 实车测试 - 场景验证”三级验证体系，最终实现电器系统高压故障发生率从传统设计的在BMS电芯均衡精度提升至 ±5 mV、故障诊断时长从120min缩短至42min。

In view of the problems of high risk of high voltage insulation failure, low control accuracy of battery management system (BMS) and poor efficiency of fault diagnosis in the electrical system of new energy vehicles under the conditions of rainy, high humidity and low temperature bumpy in Guizhou mountainous areas, combined with the needs of regional industrial development, the special design is carried out from the dimensions of weather resistance integration of high voltage electrical system, multi-condition adaptation of BMS, vehicle network and fault diagnosis optimization. Through the optimization of the IP67 seal structure of the high-voltage distribution box, the innovation of the BMS adaptive equalization control algorithm, the anti-interference design of the CAN FD bus, and the three-level verification system of "virtual simulation-real vehicle test-scene verification", the high-voltage fault rate of the electrical system is reduced from the traditional design of 0.8 times/km to 0.12 times/km, the equalization accuracy of the BMS cell is increased to ±5 mV, and the fault diagnosis time is shortened from 120 min to 42 min.