Abstract: Embodiments of the present disclosure provide a battery welding system and a control method therefor. The battery welding system includes a welding module including a welding apparatus, a driving assembly and a plurality of range finders, wherein at least some of the range finders are connected to a driving end of the driving assembly, and the driving assembly drives the range finders to move in a first direction such that a separation distance between the range finders in the first direction changes. In the battery welding system in the embodiments of the present disclosure, the driving assembly driving the range finders to move enables the separation distance between the range finders in the first direction to change, so that the separation distance between the range finders can correspond to a separation distance between regions to be welded on the battery without disassembling the range finders.

Abstract: A coordinate conversion method includes obtaining a first post coordinate set of at least one post of a battery product in an addressing station coordinate system, and a first marking point coordinate set that corresponds to each of at least two marking points in the addressing station coordinate system; obtaining a second marking point coordinate set of the at least two marking points in a welding station coordinate system; determining, based on the first marking point coordinate set and the second marking point coordinate set, conversion parameters of coordinates between the addressing station coordinate system and the welding station coordinate system, where the conversion parameters include a rotation parameter and a translation amount; and performing, based on the conversion parameters, a conversion on the first post coordinate set to obtain a second post coordinate set of the at least one post in the welding station coordinate system.

Abstract: Provided are a welding system and a spot check method for a welding system. The welding system includes a controller, a human-machine interface, and a welding device. The spot check method for a welding system includes: controlling a rangefinder in a welding device to perform ranging, along a first direction, of at least two posts in a battery product to be welded, so as to obtain a set of ranging values between the at least two posts and the rangefinder, the first direction being parallel to an optical axis of a laser galvanometer in the welding device, the rangefinder being calibrated based on a first position in the first direction, the first position being a position of a focal point of the laser galvanometer in the first direction, and the rangefinder being at a fixed distance from the laser galvanometer in the first direction.

Abstract: Embodiments of the present application provide a method for detecting a power of a welding laser light and a laser welding system. The method for detecting a power of a welding laser light includes obtaining at least one power sample, wherein the power sample is obtained by sampling, every preset time period, the power of the welding laser light emitted by a laser. The method may further include acquiring a plurality of power samples within a preset power range in the at least one power sample. The method may further include processing the plurality of power samples within the preset power range to obtain power detection results.

Abstract: The present application relates to a pre-stacking device, a battery processing equipment and a pre-stacking method. The pre-stacking device includes a mounting base, a tray, and a pushing assembly. The mounting seat includes at least one station, the tray is arranged on the mounting seat, the tray is used to carry at least two battery cells arranged along their thickness direction, and the pushing assembly is movably arranged at one of the stations along the thickness direction of the battery cells. The pushing assembly is used to drive the battery cells on the tray to move along the thickness direction of the battery cells on the corresponding station, so that every two adjacent battery cells are attached to each other. The close stacking of multiple battery cells along their thickness direction can be realized through the pushing operation by the pushing assembly.