Winding type liquid cooling pipeline and cell-to-pack battery pack

Abstract

The invention relates to a winding type liquid cooling pipeline and a cell-to-pack battery pack. According to the winding type liquid cooling pipeline and the cell-to-pack battery pack, a continuous S-shaped bent liquid cooling plate is adopted to wind battery cells, the contact area between the S-shaped bent liquid cooling plate and the battery cells is increased, and rapid heat dissipation is realized; a cooling liquid circulates in the S-shaped bent liquid cooling plate more smoothly and straightly, backflow is not needed, and heat exchange between the cooling liquid and the battery cells is more uniform; the S-shaped bent liquid cooling plate can position and fix the battery cells; partition plates are arranged, so that the bottoms of the battery cells can be positioned, the transversemovement of the battery cells is prevented, and the liquid cooling plate can be supported; the liquid cooling plate adopts a hollow structural design, is made of a special material, and can buffer the expansion of the battery cells, so that the battery cells are prevented from extruding and deforming a lower box body, or the displacement of the battery cells can be avoided. According to the battery pack disclosed by the invention, an additional bracket and connecting piece for fixing the single battery cells are not needed, so that the battery pack is convenient and quick to assemble; the heat dissipation efficiency of the battery pack is high; and energy density can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a winding liquid-cooling pipeline and a battery pack without a modular structure. Background technique [0002] Due to the requirements of the cruising range and all-weather use of the car, the service life and lightweight requirements of the power battery pack are getting higher and higher. With the development of power battery technology, power battery packs mostly improve the power battery by improving the integration of components. The energy density of the system, that is, to minimize the space occupied by the repeated connection and fixed structure of the parts in the power battery pack, provide more available space for the power battery pack, increase the volumetric energy density of the power battery pack, and thereby increase the cruising range of electric vehicles . [0003] However, the modular structure in the prior art uses copper sheet connections and metal...

AI Technical Summary

Problems solved by technology

In the current liquid cooling method, a plurality of battery cells are generally fixed into a group with a bracket, and then a single liquid cooling plate is inserted between the battery cells one by one. The above structure requires a large number of connectors to fix the battery cells and brackets, brackets and shells. body, takes up a lot of space, low energy density, and high cost; and a connecting pipe needs to be provided between the liquid cold plate and the liquid cold plate for the circulation of the cooling liquid, and the connecting pipe is installed on the top or bottom of the battery cell and requires additional space. And it is not convenient for coolant to circulate and dissipate heat

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