Abstract: The present application discloses an explosion-proof structure and a battery. The explosion-proof structure includes a cover plate, and an explosion-proof groove is provided on the cover plate. The explosion-proof groove includes a first sub-groove and a second sub-groove, a projection of the first sub-groove and a projection of the second sub-groove on a side of the cover plate encloses a closed ring, and a thickness of the cover plate at the position where the first sub-groove is located is less than a thickness of the cover plate at the position where the second sub-groove is located. The present application improves the reliability of the cover plate and ensures the explosion-proof effect.

Abstract: A cover plate, a battery, and a battery pack are provided. The cover plate includes a body and an explosion-proof. The body includes a first sub-part and a second sub-part. The second sub-part includes a sinking table and a boss connected. The second sub-part includes a first side surface and a second side surface disposed oppositely. The boss is higher than the sinking table and the first sub-part. The explosion-proof groove is disposed on the first side surface. A first sub-groove of the explosion-proof groove is at least partially located on the sinking table. A second sub-groove of the explosion-proof groove is located on the boss.

Abstract: A battery explosion-proof structure, a battery, and a battery pack are provided. The battery explosion-proof structure includes a cover plate provided with a first score and a second score. A thickness of the cover plate at the first score is less than a thickness of the cover plate at the second score. The first score includes a first segment and a second segment connected together. The first segment includes a first end and a second end. The second segment includes a third end and a fourth end. A distance between the first end and the third end is greater than a distance between the second end and the fourth end.

Abstract: An explosion-proof structure, a battery, and a battery pack are provided. The explosion-proof structure includes a cover plate and an explosion-proof groove including a first sub-groove and a second sub-groove. H1<H2, in which H1 denotes a thickness of a part of the cover plate where the first sub-groove is located, and H2 denotes a thickness of a part of the cover plate where the second sub-groove is located. The part of the cover plate where the first sub-groove is located is opened under a first pressure denoted by P1, and the part of the cover plate where the second sub-groove is located is opened under a second pressure denoted by P2, in which the first pressure satisfies 0.5 Mpa<P1<1.5 Mpa; and the second pressure satisfies 1.5 Mpa?P2<2.5 Mpa.

Abstract: An optical device and use thereof are provided. The optical device includes: at least one lens element, a lens barrel and at least one heating element, wherein the lens barrel has an installation cavity, the lens element is installed in the installation cavity, and the heating element is arranged to contact a surface of the lens element near an object side in a manner capable of being powered-on to generate heat; or, the heating element has at least two terminals, and at least two conductive elements are fixed at positions in contact and electrical connection with the corresponding terminals, respectively. According to the above technical solution, the heating element can generate heat, to heat the lens element so as to accelerate the dissipation of moisture attached to the surface, has an active defogging and defrosting function, and can prevent against fogging or frosting.

Abstract: An optical device and use thereof are provided. The optical device includes: at least one lens element, a lens barrel and at least one heating element, wherein the lens barrel has an installation cavity, the lens element is installed in the installation cavity, and the heating element is arranged to contact a surface of the lens element near an object side in a manner capable of being powered-on to generate heat; or, the heating element has at least two terminals, and at least two conductive elements are fixed at positions in contact and electrical connection with the corresponding terminals, respectively. According to the above technical solution, the heating element can generate heat, to heat the lens element so as to accelerate the dissipation of moisture attached to the surface, has an active defogging and defrosting function, and can prevent against fogging or frosting.