Gas-exhausting apparatus, battery cell, battery and electricity-consuming apparatus

A gas-exhausting apparatus for a battery cell, comprising:

• a gas-exhausting body;
• and
• a gas-exhausting mechanism, arranged in the gas-exhausting body, wherein:
• the gas-exhausting mechanism comprises a connecting assembly and a gas-ventilating member;
• the connecting assembly is configured to connect the gas-exhausting body;
• the connecting assembly comprises a first connecting member and a second connecting member;
• the first connecting member is provided with a first through hole for communicating with an inside of the battery cell;
• the second connecting member is provided with a second through hole for communicating with an outside of the battery cell;
• the gas-ventilating member is configured to communicate with the first through hole and the second through hole and exhaust gas to the outside of the battery cell through the first through hole and the second through hole when a gas pressure of the inside of the battery cell reaches a threshold value;
• the first connecting member is configured to attach to a surface of the gas-ventilating member facing the inside of the battery cell, the second connecting member is configured to attach to a surface of the gas-ventilating member facing away from the inside of the battery cell, and an orthographic projection of the first through hole on the gas-ventilating member and an orthographic projection of the second through hole on the gas-ventilating member are arranged to be staggered from each other;
• the gas-ventilating member comprises a first gas-ventilating film, a second gas-ventilating film, and a third gas-ventilating film arranged to be stacked with one another in an axial direction of the first through hole, a surface of the first gas-ventilating film facing the inside of the battery cell is attached to the first connecting member, a surface of the third gas-ventilating film facing away from the inside of the battery cell is attached to the second connecting member, and a gas-ventilating amount of the second gas-ventilating film is greater than a gas-ventilating amount of the first gas-ventilating film and a gas-ventilating amount of the third gas-ventilating film;
• the gas-exhausting body comprises a third through hole extending in an axial direction of the first through hole and configured to accommodate at least a part of the gas-exhausting mechanism, the third through hole being a stepped hole and comprising a first hole segment, a second hole segment, and a first stepped surface, the first stepped surface connecting a hole wall of the first hole segment with a hole wall of the second hole segment, each hole wall being a surface of the gas-exhausting body, and the first stepped surface being configured to support one of the first connecting member and the second connecting member;
• and
• the first through hole is one of a plurality of first through holes distributed to be spaced apart from one another on the first connecting member, a connecting portion being formed between two adjacent first through holes, and the connecting portion being attached to the surface of the gas-ventilating member facing the inside of the battery cell through an adhesion connection or a chemical bond connection.

A gas-exhausting apparatus for a battery cell, comprising:

• a gas-exhausting body;
• and
• a gas-exhausting mechanism, arranged in the gas-exhausting body, wherein:
• the gas-exhausting mechanism comprises a connecting assembly and a gas-ventilating member;
• the connecting assembly is configured to connect the gas-exhausting body;
• the connecting assembly comprises a first connecting member and a second connecting member;
• the first connecting member is provided with a first through hole for communicating with an inside of the battery cell;
• the second connecting member is provided with a second through hole for communicating with an outside of the battery cell;
• the gas-ventilating member is configured to communicate with the first through hole and the second through hole and exhaust gas to the outside of the battery cell through the first through hole and the second through hole when a gas pressure of the inside of the battery cell reaches a threshold value;
• the first connecting member is configured to attach to a surface of the gas-ventilating member facing the inside of the battery cell, the second connecting member is configured to attach to a surface of the gas-ventilating member facing away from the inside of the battery cell, and an orthographic projection of the first through hole on the gas-ventilating member and an orthographic projection of the second through hole on the gas-ventilating member are arranged to be staggered from each other;
• the gas-ventilating member comprises a first gas-ventilating film, a second gas-ventilating film, and a third gas-ventilating film arranged to be stacked with one another in an axial direction of the first through hole, a surface of the first gas-ventilating film facing the inside of the battery cell is attached to the first connecting member, a surface of the third gas-ventilating film facing away from the inside of the battery cell is attached to the second connecting member, and a gas-ventilating amount of the second gas-ventilating film is greater than a gas-ventilating amount of the first gas-ventilating film and a gas-ventilating amount of the third gas-ventilating film;
• and
• the gas-exhausting body comprises a third through hole extending in an axial direction of the first through hole and configured to accommodate at least a part of the gas-exhausting mechanism, the third through hole being a stepped hole and comprising a first hole segment, a second hole segment, and a third hole segment, a radial size of the third hole segment being smaller than a smallest radial size of a region of the gas-exhausting mechanism.