Battery housing and battery
The present application provides a battery housing and a battery, where the battery housing includes a first cover body, a second cover body, a sealing member and a housing body, the second cover body is welded to the housing body, and the first cover body is adhered to the second cover body through the sealing member, so as to seal the housing body; where an adhesion force between the first cover body and the second cover body is less than a first pressure, the first pressure is a pressure borne by the battery housing when the battery housing explodes. When the battery explodes, an adhesion force layer between the first cover body and the second cover body can be broken through to release gas generated in the battery housing, avoiding an explosion due to a continuous increase of an internal pressure of the battery housing.
1 . A battery housing, comprising a first cover body, a second cover body, a sealing member, and a housing body, with the second cover body being welded to the housing body, and the first cover body being adhered to the second cover body through the sealing member to seal the housing body; wherein an adhesion force between the first cover body and the second cover body is less than a first force, and the first force is a force borne by the battery housing when the battery housing explodes;
wherein the adhesion force is 20 N to 100 N;
wherein a middle part of the second cover body is provided with a through hole, and a position of the first cover body corresponding to the through hole bulges towards a direction of the second cover body to form a boss part adapted to the through hole; the sealing member is sleeved around an outer wall of the boss part, and the boss part is embedded into the through hole.
2 . The battery housing according to claim 1 , wherein the first force is 25 N to 200 N.
3 . The battery housing according to claim 1 , wherein a surface of the first cover body and a surface of the second cover body are both covered with a passivation layer, and a thickness of the passivation layer is 1 μm to 3 μm, and the adhesion force is proportional to the thickness of the passivation layer.
4 . The battery housing according to claim 1 , wherein a thickness of the sealing member is 0.1 mm to 0.3 mm, and the adhesion force is proportional to the thickness of the sealing member.
5 . The battery housing according to claim 1 , wherein the sealing member comprises a first material layer, a base layer, and a second material layer, which are sequentially arranged in layers, the first material layer is adhered to the first cover body, and the second material layer is adhered to the second cover body;
wherein the first material layer and the second material layer have a melting point of 100° C. to 400° C.
6 . The battery housing according to claim 5 , wherein a thickness of the first material layer is 0.05 mm to 0.1 mm, a thickness of the base layer is 0.05 mm to 0.1 mm, and a thickness of the second material layer is 0.05 mm to 0.1 mm.
7 . The battery housing according to claim 1 , wherein an area of the sealing member is less than an area of the first cover body and more than ⅔ of an overlapping area between the first cover body and the second cover body, and the adhesion force is proportional to the area of the sealing member.
8 . The battery housing according to claim 1 , wherein an outer diameter of the first cover body is 7 mm to 15 mm, an outer diameter of the sealing member is 7.5 mm to 15.5 mm, and an outer diameter of the second cover body is 8 mm to 16 mm.
9 . The battery housing according to claim 1 , wherein the sealing member is configured for sealing and is configured as an explosion-proof device.
10 . A battery, comprising the battery housing according to claim 1 .
11 . The battery according to claim 10 , wherein the first force is 25 N to 200 N.
12 . The battery according to claim 10 , wherein a surface of the first cover body and a surface of the second cover body are both covered with a passivation layer, and a thickness of the passivation layer is 1 μm to 3 μm, and the adhesion force is proportional to the thickness of the passivation layer.
13 . The battery according to claim 10 , wherein a thickness of the sealing member is 0.1 mm to 0.3 mm, and the adhesion force is proportional to the thickness of the sealing member.
14 . The battery according to claim 10 , wherein the sealing member comprises a first material layer, a base layer, and a second material layer, which are sequentially arranged in layers, the first material layer is adhered to the first cover body, and the second material layer is adhered to the second cover body;
wherein the first material layer and the second material layer have a melting point of 100° C. to 400° C.
15 . The battery according to claim 14 , wherein a thickness of the first material layer is 0.05 mm to 0.1 mm, a thickness of the base layer is 0.05 mm to 0.1 mm, and a thickness of the second material layer is 0.05 mm to 0.1 mm.
16 . The battery according to claim 10 , wherein an area of the sealing member is less than an area of the first cover body and more than ⅔ of an overlapping area between the first cover body and the second cover body, and the adhesion force is proportional to the area of the sealing member.
17 . The battery according to claim 10 , wherein an outer diameter of the first cover body is 7 mm to 15 mm, an outer diameter of the sealing member is 7.5 mm to 15.5 mm, and an outer diameter of the second cover body is 8 mm to 16 mm.