Circuit board and battery connection module

A battery connection module used to connect a plurality of batteries arranged side by side, the battery connection module comprising:

• an insulating frame configured to house the plurality of batteries;
• a conductive busbar on the insulating frame, the busbar being configured to electrically connect electrodes of at least two adjacent batteries;
• a circuit board comprising an insulating substrate and a conductive circuit trace on the insulating substrate;
• a conductive connecting tab extending from the circuit board and electrically coupled with the trace on the circuit board, wherein the conductive connecting tab further overlays, and is electrically coupled with, the busbar;
• and
• a fuse unit comprising a main fuse and a spare fuse, the main fuse having a main fuse section and first and second main trace connection end portions at opposite first and second ends of the main fuse section, the spare fuse having a spare fuse section and first and second spare trace connection end portions at opposite first and second ends of the spare fuse section, wherein the first main trace connection end and the first spare trace connection end are electrically connected to the conductive connecting tab, the main fuse section and the spare fuse section being spaced apart from each other and arranged side by side,
• wherein the second main trace connection end portion is electrically connected with the circuit trace and the second spare trace connection end portion is not electrically connected with the circuit trace in a first condition, and
• wherein the second spare trace connection end portion is electrically connected with the circuit trace and the second main trace connection end portion is not electrically connected with the circuit trace in a second condition, and
• wherein a plurality of the conductive circuit traces are provided on the insulating substrate, and a plurality of the busbars are provided and coupled with individual ones of the circuit traces by a respective fuse unit.