Test system and test method therefor

A test system for testing a wire harness on-off condition of a battery module, the battery module comprising multiple battery cells connected in series and parallel, wherein the test system comprises:

• a test circuit board provided with a test circuit, the test circuit comprising multiple main lines arranged side by side, one end of each of the main lines being used to connect with a positive electrode or a negative electrode of each battery cell of the battery module, and the other end of each of the main lines being connected with a first branch and a second branch, wherein each said first branch is provided with one control switch, and each said second branch is provided with one said control switch;
• a test device for testing parameter information for the multiple battery cells of the battery module;
• a lower computer electrically connected to the control switch to control a first branch connected to one of the main lines to be electrically conductive to a positive electrode of the test device and a second branch connected to another one of the main lines to be electrically conductive to a negative electrode of the test device;
• and
• an upper computer communicatively connected to both the test device and the lower computer to control the operation of the lower computer and read parameter information for the test device;
• wherein ends of the multiple first branches that are not connected to the main lines are connected to form a first connecting end, ends of the multiple second branches that are not connected to the main lines are connected to form a second connecting end, one of the first connecting end and the second connecting end is electrically connected to the positive electrode of the test device, and the other one is electrically connected to the negative electrode of the test device;
• and
• wherein:
• the first connecting end is provided in a number of at least two, the at least two first connecting ends being provided in parallel;
• and/or
• the second connecting end is provided in a number of at least two, the at least two second connecting ends being provided in parallel.