Low-ground safety protection method of battery pack thermal-diffusion testing

The invention discloses a low-ground safety protection method of battery pack thermal-diffusion testing. A sinking-type battery pack thermal-runaway testing method is adopted, a battery pack is placedon a stainless-steel structure platform, which is capable of moving up and down, for testing, and in testing, the stainless-steel structure platform is at a highest position, and is exposed out of the ground; and after testing is completed, the stainless-steel structure platform moves down until the battery pack is completely immersed in a sinking water pool, and cooling and temperature reducing,fire and smoke extinguishing and safety isolation on the battery pack are realized. The method can more safely realize cooling and temperature reducing, fire and smoke extinguishing and safety isolation on the battery pack through the one sinking water pool and operation of sinking the battery pack into the water pool after battery pack testing is completed. 一种电池包热扩散试验的低地安全防护方法，采用下沉式电池包热失控测试方法，将电池包放置在一个可升降的不锈钢结构平台上进行试验，试验