A sealed water-cooled plate structure applied to lithium battery modules

Abstract

The invention relates to a sealed water cooling plate structure used on a lithium battery module. The sealed water cooling plate structure comprises an aluminum plate and an aluminum cover plate which are welded together, the aluminum plate is die-casted with a water cooling channel, an inlet end and an outlet end of the water cooling channel are respectively plugged with a rotatable water cooling joint, a circumferential wall of a plugging portion of the rotatable water cooling joint is embedded with at least one radial sealing ring, the radial sealing ring is in seal cooperation with a hole wall of the water cooling channel, the outside of the plugging portion of the rotatable water cooling joint is embedded with an axial limiting pressing sheet, and the axial limiting press sheet is locked on the aluminum plate or the aluminum cover plate through a screw. The sealed water cooling plate structure can guarantee no current leakage, realizes the flexible rotation of the water cooling joint in a 360DEG range, guarantees the flexibility of a water connecting position, avoids water leakage caused by rotation, improves the heat dissipating effect of the lithium battery module, and is in favor of the assembling and fixing of a water cooling plate.

Description

Technical field: [0001] The invention relates to a sealed water-cooled plate structure applied to a lithium battery module, and belongs to the technical field of power batteries. Background technique: [0002] Most of the current high-energy and high-power lithium battery modules are used for pure electric vehicles, plug-in hybrid vehicles, pure electric buses and plug-in hybrid buses. Due to the large current discharge, the lithium battery module generates a lot of heat, which will seriously affect the performance, life and safety of the battery if it is not removed in time. Therefore, most of the lithium battery modules currently use air-cooled or liquid-cooled heat dissipation methods to dissipate heat. As for air cooling, the air duct design required by forced convection requires a relatively large space for the lithium battery module, so the liquid cooling method is generally considered to have the best heat dissipation effect in the industry. Since the commonly used ...

AI Technical Summary

Problems solved by technology

Due to the space limitation of the lithium battery module box, the positions of the battery modules in the box are different. In order to ensure that each lithium battery is connected to the waterway smoothly, the water-cooled elbow is required to be flexible within a range of 360°. , while the existing water-cooled elbow generally adopts the structure of threaded connection and axial seal, which leads to loose fitting of the axial sealing ring at the end of the water-cooled elbow when the orientation of the water-cooled elbow is adjusted, resulting in water leakage and other undesirable phenomena

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