Lithium ion battery pack

Abstract

The invention provides a lithium ion battery pack which comprises a water cooling box, a switch box, a lower box of the battery pack, a water cooling plate, battery modules and an upper cover of the battery pack, wherein the water cooling plate is positioned at the bottom of the lower box of the battery pack; the battery modules are arranged on the water cooling plate; the upper cover of the battery pack is positioned on the battery modules and can be fitted with the lower box of the battery pack so as to form a closed box, and the water cooling plate and the battery modules are contained in the box; the switch box and a water cooling box are arranged outside the lower box of the battery pack and at the bottom of the lower box of the battery pack, and the lower box of the battery pack is provided with a high-voltage connector and a low-voltage connector connected with high-voltage connecting line and low-voltage connecting lines of the battery modules; the switch box is internally provided with a first connector connected with the high-voltage connector and the low-voltage connector, and a second connector connected with an external wire; and the water cooling box is provided with a liquid inlet and a liquid outlet. With the adoption of the lithium ion battery pack provided by the embodiment of the invention, the energy intensity of the battery pack can be improved under same space volume, and sable and safe cruising power is provided for a new energy automobile.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a lithium-ion battery pack. Background technique [0002] At present, with the rapid development of the new energy vehicle industry, how to improve the stable and safe battery life of new energy vehicles has attracted more and more attention. Among the existing power batteries for new energy vehicles, lithium-ion batteries have relatively low production costs, can be recharged repeatedly, and are very convenient to use. Compared with other portable energy sources, lithium-ion batteries have a higher cost advantage. [0003] In the prior art, the interior of the lithium-ion battery pack not only includes the battery module, but also includes a switch box composed of electrical components such as a battery management system, a relay, and a fuse. The switch box is an integral part of the operation of the Li-ion battery pack. The battery management system in the switc...

AI Technical Summary

Problems solved by technology

[0004] Based on the above, the lithium electronic battery pack in the prior art is not only provided with a switch box, but also provided with a water cooling box, which takes up a large space when the same amount of power is provided, resulting in a relatively low energy density of the lithium electronic battery pack. Small

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