Extrusion pressure detection device of battery module

Abstract

The invention provides an extrusion pressure detection device of a battery module. The device comprises a top plate, a baseplate and an extrusion mechanism, wherein struts are disposed on peripheriesof the upper surface of the baseplate, and tops of the struts are connected to the top plate respectively; the extrusion mechanism comprises an air cylinder and an extrusion plate, the air cylinder isdisposed at the center of the upper surface of the baseplate, and a piston of the air cylinder is connected to the center of the lower surface of the extrusion plate; guide pipes are disposed on peripheries of the air cylinder, guide pillars are allocated in the guide pipes respectively, tops of the guide pillars are connected to the lower surface of the extrusion plate, and the guide pillars extend to the part under the baseplate and are connected to a fixed plate; pressure sensors are disposed on peripheries of the upper surface of the extrusion plate respectively, and positioning jigs areconnected above the pressure sensors; limiting studs are disposed on the lower surface of the baseplate towards the fixed plate, and limiting nuts are configured on the limiting studs; and a displacement sensor is disposed at the center of the fixed plate towards the baseplate, and the top of the displacement sensor is connected to the lower surface of the baseplate. The extrusion pressure detection device has the advantages of pressure detection, air cylinder stroke limiting and adaptation to different products.

Description

Technical field [0001] The invention belongs to the technical field of battery module welding, and specifically relates to a battery module extrusion pressure detection device. Background technique [0002] Laser welding technology has a wide range of applications and can be applied to many fields such as automobiles and electronics. In the field of new energy, the application of laser welding is becoming more and more extensive. For example, the welding of cell poles and pole pieces, and the welding of bus plates and pole pieces will all adopt laser welding. However, laser welding requires a high degree of focal length change and the adhesion between the cell pole and the pole piece. During the pressing process, if the pressure is too small, the height difference between the cell pole and the pole piece will cause a gap, resulting in poor welding; if Excessive pressure can easily damage the cell poles and pole pieces, so a battery module extrusion pressure detection device is n...

AI Technical Summary

Problems solved by technology

However, laser welding has high requirements for the change of focal length and the degree of fit between the pole of the battery and the pole. Excessive pressure is easy to damage the battery pole and the pole piece, so a squeeze pressure detection device for the battery module is needed

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