Abstract: This application relates to a cover assembly of a secondary battery. The cover assembly includes a cover plate with an air hole; a blocker inserted into and blocking the air hole; a sealing member disposed between the blocker and the cover plate configured to seal a gap between the blocker and the cover plate; and a fastener disposed inside the air hole. The fastener is connected to the cover plate, the blocker is connected to the cover plate through the fastener. The fastener is configured to deform in response to a temperature rise, so that the blocker stops blocking the air hole. The blocker stops blocking the air hole as a temperature inside a housing rises, to discharge gas from the housing through the air hole. In this way, the secondary battery can be prevented from an explosion, while partial heat is taken away through gas discharge.

Abstract: An adjustable cross-frame assembly includes a first elongate flexible line, a second elongate flexible line, and an adjustable-length jack assembly. The first elongate flexible line is coupled in tension to a first portion of a first girder and to a second portion of a second girder. The first elongate flexible line extends concurrently with a plane that intersects both of the first and second girders. The second elongate flexible line is coupled in tension to a second portion of the first girder and to a second portion of the second girder. The second elongate flexible line extends concurrently with the plane. The adjustable-length jack assembly is coupled to the first portion of the first girder and to the second portion of the second girder. The adjustable-length jack assembly extends concurrently with the plane.

Abstract: An operation defense method and device, apparatus and computer-readable storage medium are provided. The method includes: receiving an operation request from a business system through a shared interface; according to a parameter carried in the operation request, selecting at least one risk evaluation algorithm for the operation request from an algorithm rule library shared by a plurality of service systems; performing risk evaluation to the operation request with the selected risk evaluation algorithm; and according to a risk evaluation result, determining to allow the operation request. In the present application, a centralized operation defense mechanism is used to analyze the operation requests from different service systems and to select an appropriate risk evaluation algorithm to calculate the risk coefficient of each operation request, so that an operation with a high risk can be prevented, and a diffusion range of an abnormality can be reduced.

Abstract: An operation defense method and device, apparatus and computer-readable storage medium are provided. The method includes: receiving an operation request from a business system through a shared interface; according to a parameter carried in the operation request, selecting at least one risk evaluation algorithm for the operation request from an algorithm rule library shared by a plurality of service systems; performing risk evaluation to the operation request with the selected risk evaluation algorithm; and according to a risk evaluation result, determining to allow the operation request. In the present application, a centralized operation defense mechanism is used to analyze the operation requests from different service systems and to select an appropriate risk evaluation algorithm to calculate the risk coefficient of each operation request, so that an operation with a high risk can be prevented, and a diffusion range of an abnormality can be reduced.