Liquid cooling system of double-layer module and battery pack

Abstract

The invention provides a liquid cooling system of a double-layer module and a battery pack. The liquid cooling system comprises a left module and a right module, each of the left module and the right module comprises an upper-layer module and a lower-layer module, the upper-layer module comprises two upper-layer battery modules, and the lower-layer module comprises two lower-layer battery modules. The two upper-layer battery modules and the two lower-layer battery modules are arranged in the length direction of the battery pack, a liquid cooling system is arranged on the left module and the right module, the liquid cooling system comprises a liquid inlet pipeline, a liquid outlet pipeline and eight liquid cooling plates, and the outer side surfaces of the four upper-layer battery modules and the four lower-layer battery modules are respectively sleeved with one liquid cooling plate; the liquid cooling plates are U-shaped, the liquid inlet pipeline is respectively connected with liquid inlets of the eight liquid cooling plates in parallel, and the liquid outlet pipeline is respectively connected with liquid outlets of the eight liquid cooling plates in parallel. The liquid cooling system is arranged on the compact double-layer module, a liquid cooling system supporting structure is omitted, the weight of the battery pack is reduced, the overall energy density of the battery pack is improved, and meanwhile it is guaranteed that cooling and heat dissipation of each battery module in the double-layer module are balanced.

Description

technical field [0001] The invention relates to the technical field of new energy batteries, in particular to the technical field of heat dissipation of battery packs, in particular to a liquid cooling system of a double-layer module and a battery pack. Background technique [0002] As the energy storage and power output device of electric vehicles, the power battery system is the power source of electric vehicles and the guarantee of its battery life. With the vigorous development of the new energy industry, facing the increasing demand for battery modules, the country's battery The energy density and group efficiency of the system put forward higher requirements. Affected by the space structure of the vehicle, there is often a certain limit on the height of the battery pack, and there will be a relatively high space under the rear passenger seat. In order to ensure the battery life of the electric vehicle, a double-layer mold Group arrangement. [0003] At present, the b...

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Problems solved by technology

[0005] In view of this, the present invention proposes a liquid cooling system and a battery pack of a double-layer module to solve the problem that the liquid cooling system is installed at the bottom of the double-layer module in the prior art, resulting in a bulky battery pack that requires additional support structures. The weight increases and the overall energy density of the battery pack decreases

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