Abstract: Provided in the present application are a polymer, a preparation method therefor, a positive electrode sheet, a secondary battery, and an electrical device. The polymer includes a structure as represented by Formula I. X includes a phosphate group or a phosphite group, R1 and R3 each independently include at least one of a polyether segment, a polyester segment, hydrogen and a hydrocarbon group. At least one of R1 and R3 includes a polyether segment or a polyester segment. R2 includes an organic segment. The polymer provided in the present application can effectively improve the maximum solid content of a positive electrode slurry, shorten the filtering time, improve the production efficiency and quality of the electrode sheet, and also improve the flexibility of the electrode sheet.

Abstract: A battery cell, a battery, and an electrical apparatus are described. The battery cell includes a case; an electrode assembly, the electrode assembly being provided with a tab; and a current collector plate including a first connecting plate and a second connecting plate that are connected, where the first connecting plate is connected to the tab by welding, and the second connecting plate is connected to the case by welding; and in a direction perpendicular to a thickness direction of the second connecting plate, a projection of the first connecting plate at least partially overlaps with a projection of the second connecting plate. The current collector plate can improve the stability and reliability of a connection between the case and the tab; in addition, the current collector plate has a small thickness, which can reduce occupied space in the battery cell to improve energy density of the battery cell.

Abstract: A battery cell and a manufacture method for the same, a battery, and an electrical apparatus. The battery cell includes: a shell having a first opening; a first end cover closing the first opening and being insulated from the shell; and an electrode assembly arranged in the shell and including an electrode body, a first tab and a second tab, the first tab and the second tab being led out of the electrode body and having opposite polarities, the first tab being electrically connected to the first end cover, and the second tab being electrically connected to the shell; where the first end cover serves as a first output pole, and the shell serves as a second output pole.

Abstract: A control system for controlling movement of a vehicle, is disclosed. The control system is configured to construct a graph having multiple nodes defining states of the vehicle. The multiple nodes comprise an initial node defining initial state and a target node defining target state. Each pair of nodes is connected by an edge defined by collision-free motion primitives where the nodes comprise motion cusps. Multiple nodes connected through edges form a first path. A first number of motion cusps in the first path is determined and the graph is expanded to add new nodes until a termination condition is met on determining that the first number of motion cusps is above a threshold. The expansion of the graph is subjected to a constraint associated with a total number of motion cusps. Further a second path is determined having lesser motion cusps than the first path.

Abstract: A control system for controlling movement of a vehicle, is disclosed. The control system is configured to construct a graph having multiple nodes defining states of the vehicle. The multiple nodes comprise an initial node defining initial state and a target node defining target state. Each pair of nodes is connected by an edge defined by collision-free motion primitives where the nodes comprise motion cusps. Multiple nodes connected through edges form a first path. A first number of motion cusps in the first path is determined and the graph is expanded to add new nodes until a termination condition is met on determining that the first number of motion cusps is above a threshold. The expansion of the graph is subjected to a constraint associated with a total number of motion cusps. Further a second path is determined having lesser motion cusps than the first path.

Abstract: Embodiments of the present invention provide a method, an apparatus, and a system for password control, and relate to the field of password technologies. The method includes: receiving, by a combination lock, an unlock password that is sent by a mobile terminal through a network; matching, by the combination lock, the unlock password with an unlock password preset for the mobile terminal; when the unlock password matches the unlock password preset for the mobile terminal, executing, by the combination lock, an unlock operation. Embodiments of the present invention enhance the security of entering passwords.