Protective cover, battery disconnect unit (bdu) case, bdu, and battery pack case

A battery disconnect unit (BDU) case, comprising:

• a base, an upper cover, and a protective cover;
• wherein the protective cover comprises:
• a water blocking member, wherein the water blocking member comprises a water blocking plate, the water blocking plate is arranged with a water blocking flange, the water blocking flange is configured to be snap-fit with an upper cover of a BDU allowing the water blocking plate to seal an upper opening of a first notch of the upper cover of the BDU;
• a side protection member, disposed on a side of the water blocking member and configured to be snap-fit with a base of the BDU and to cover a part of a side opening of the first notch;
• wherein the base of the BDU defines a receiving cavity;
• the upper cover of the BDU is configured to cover an opening of the receiving cavity, the upper cover of the BDU is arranged with a first notch communicating with the receiving cavity and exposing a part of the opening of the holding cavity;
• and
• the water blocking member of the protective cover is disposed at the first notch, the water blocking flange is configured to be snap-fit with the upper cover of the BDU, and the side protection member of the protective cover is configured to be snap-fit with the base of the BDU.