Waterproof assembly of energy storage device, and energy storage device

An energy storage device, comprising:

• a battery;
• a wire harness;
• and
• a waterproof assembly for implementing a waterproof function at a connection between the wire harness and the battery, the waterproof assembly including:
• a boss, which is arranged on an outer wall of a case of the battery and comprises a first outward protruding portion that defines a first through hole in communication with an interior of the case;
• and
• a wire harness cover, which is configured to be of a hollow cavity structure for receiving the wire harness and is internally provided with a first recess that is configured to accommodate the first outward protruding portion to communicate the first through hole with the hollow cavity;
• wherein the boss comprises:
• a first end, which is connected to a side wall of the case;
• and
• a second end, which is arranged opposite the first end and is provided with the first outward protruding portion;
• wherein a second recess is formed between the first end and the first outward protruding portion and is configured to accommodate an opening section of the wire harness cover:
• wherein the wire harness cover comprises:
• a mouth portion, which is located at one end of the wire harness cover connected to the boss and is provided with an opening through which the first outward protruding portion enters the hollow cavity of the wire harness cover, wherein the first outward protruding portion extends outward in a radial direction and the opening section extends inward in the radial direction to overlap and interlock with the first outward protruding portion in an axial direction perpendicular to the radial direction;
• a tail portion, which is located at the other end of the wire harness cover and comprises a second through hole through which the wire harness enters the hollow cavity of the wire harness cover;
• and
• a transition portion, which connects the mouth portion with the tail portion, the outer diameter of one end of the transition portion connected to the mouth portion being greater than the outer diameter of one end of the transition portion connected to the tail portion;
• and
• wherein the tail portion comprises a bent tail pipe, and an inner cavity of the bent tail pipe is in communication with the second through hole.

A waterproof assembly of an energy storage device, the waterproof assembly comprising:

• a boss, which is arranged on an outer wall of a case of a battery and comprises a first outward protruding portion that defines a first through hole in communication with an interior of the case;
• and
• a wire harness cover, which is configured to be of a hollow cavity structure for receiving a wire harness and is internally provided with a first recess that is configured to accommodate the first outward protruding portion to communicate the first through hole with the hollow cavity;
• wherein the boss comprises:
• a first end, which is connected to a side wall of the case;
• and
• a second end, which is arranged opposite the first end and is provided with the first outward protruding portion;
• wherein a second recess is formed between the first end and the first outward protruding portion and is configured to accommodate an opening section of the wire harness cover;
• wherein the wire harness cover comprises:
• a mouth portion, which is located at one end of the wire harness cover connected to the boss and is provided with an opening through which the first outward protruding portion enters the hollow cavity of the wire harness cover, wherein the first outward protruding portion extends outward in a radial direction and the opening section extends inward in the radial direction to overlap and interlock with the first outward protruding portion in an axial direction perpendicular to the radial direction;
• a tail portion, which is located at the other end of the wire harness cover and comprises a second through hole through which the wire harness enters the hollow cavity of the wire harness cover;
• and
• a transition portion, which connects the mouth portion with the tail portion, the outer diameter of one end of the transition portion connected to the mouth portion being greater than the outer diameter of one end of the transition portion connected to the tail portion;
• and
• wherein the tail portion comprises a bent tail pipe, and an inner cavity of the bent tail pipe is in communication with the second through hole, and
• wherein:
• an outer side wall of the first outward protruding portion is in interference-fit with an inner wall of the opening section of the wire harness cover, such that a continuous boss surface of the first outward protruding portion contacts a continuous wire harness cover surface of the opening section in the radial direction, and
• the first recess includes an inner side wall that applies a radial hooping force to the outer side wall of the first outward protruding portion to form the interference-fit.