Direct-cooling and direct-heating type battery pack temperature control test system with wide adjustment range

The invention discloses a direct cooling and direct heating type battery pack temperature control test system with a wide adjustment range. The system comprises a main compressor in a main temperature control circulation loop, an a1 heat exchange channel in a first main heat exchanger, a b1 heat exchange channel in a second main heat exchanger, an electronic expansion valve and a direct cooling plate. The main temperature control circulation loop further comprises a four-way valve, and the four-way valve comprises an a-way valve, an A-way valve, a b-way valve and a B-way valve; a wide adjusting range is realized; the compressor liquid impact is solved. 本发明公开了一种宽调节范围的直冷直热式电池包控温测试系统，包括主控温循环回路中的主压缩机、第一主换热器内的a1换热通道、第二主换热器内的b1换热通道、电子膨胀阀和直冷板；主控温循环回路中还包括四通阀，四通阀包括a通、A通、b通和B通；实现较宽的调节范围；解决压缩机液击。