Battery module and battery pack

The utility model belongs to the technical field of power electronics, and provides a battery module and a battery pack, the battery module connects all battery modules in series by using a first switch, and connects all the battery modules by using a series switch group to form a maintainable module structure; when one or more battery modules have faults such as low voltage or low capacitance, the faulted battery module can be removed through the first switch and the series switch group, the personal and property safety cannot be threatened even if the battery module is continuously used, and the whole battery module/battery pack does not need to be scrapped, so that the cost is reduced, and the working efficiency is improved. The battery module is simple and reliable in structure and low in cost.