Testing system, battery production line, and testing method

A testing system, comprising a control device and a test device, wherein:

• the test device comprises a frame and at least two probe card adjustment assemblies;
• the control device is connected to the test device, and is configured to adjust the probe card adjustment assemblies according to an adjustment strategy, and drive the adjusted probe card adjustment assemblies to test a battery module currently to be tested;
• the adjustment strategy is determined based on current module information of the battery module currently to be tested and historical module information of a battery module tested last time;
• wherein the probe card adjustment assemblies are arranged along a first direction, and each probe card adjustment assembly comprises:
• a probe card carrying member slidably connected to the frame along the first direction;
• at least two probes arranged along a second direction, wherein the probes are configured to test the battery module;
• and
• at least two probe cards, each connecting to a probe;
• wherein the first direction is arranged at an included angle with respect to the second direction.