Lithium battery liquid cooling box

Abstract

The invention provides a lithium battery liquid cooling box which comprises a casing, a flat heat pipe, a casing cover and a liquid cooler; the square casing comprises a base plate, two long side plates and two short side plates, and the base plate, two long side plates and two short side plates form a cavity for placing a lithium battery group; the flat heat pipe is placed in the bottom of the cavity, and includes a U-shaped seal pipe in the external and an imbibition core, a gas channel and a work liquid in the internal; the bottom of the flat heat pipe is placed on the base plate, the two sides of the flat heat pipe makes contact with the two long side plates respectively, and the flat heat pipe is used to transfer heat of the lithium battery group mounted in the upper to the two long side plates; the casing cover is detachably mounted on the casing, and is used to enclose the cavity; and the liquid cooling device is hollow and arranged surrounding the casing, and includes an inletand outlet, the cooling inlet enters the inside of the liquid cooling device via the inlet and flows out of the outlet, and the liquid cooling device is used to cool the two long side plates.

Description

Technical field [0001] The invention relates to a liquid cold box for a lithium battery. Background technique [0002] The current shortage and consumption of oil have caused a huge burden on the country. The development of environmental protection awareness and humanistic environment also puts forward requirements for transportation. Therefore, the development prospects of new energy vehicles are broad. At present, a major problem facing new energy vehicles is to solve The battery life issue, and the heat dissipation of the battery is a key part of it. [0003] Now for the lithium battery pack loaded in the battery box, the heat dissipation methods are mainly divided into air cooling and water cooling, and the heat dissipation effect of water cooling is much better than air cooling; currently water cooling is mainly realized in two ways: one is in the battery box Multiple cold water pipes are installed around the battery, and electrical components such as relays need to be placed...

AI Technical Summary

Problems solved by technology

[0003] At present, for the lithium battery pack loaded in the battery box, the heat dissipation methods are mainly divided into air cooling and water cooling, and the heat dissipation effect of water cooling is much better than that of air cooling; at present, water cooling is mainly realized in two ways: one is in the battery box Multiple cold water pipes are installed around the battery, and electrical components such as relays need to be placed in the battery box, resulting in a complex structure, inconvenient maintenance in the later stage of installation, and the hidden danger of water leakage and damage to the battery cells; the second is to adopt the bottom of the battery pack. For example, a liquid cold plate is installed under the battery pack, or a water channel is provided on the bottom plate of the battery box, and the battery pack is cooled by flowing water. The advantage of this method is that the internal structure of the battery box is simple, and the installation and replacement of the battery is convenient; the disadvantage of the liquid cold plate or the battery box After the body base plate is refitted, it still needs to bear the weight of the battery pack, and the battery pack of a new energy vehicle is heavy, and the bumps and vibrations during driving will increase the chance of water leakage from the liquid cooling plate, posing a safety hazard

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