Battery module with fluid cooling passage

Abstract

The invention relates to the field of battery modules, in particular to a battery module for supplying power to an electric vehicle. A battery module with a fluid cooling passage comprises a plurality of liquid heat exchange managing units, wherein each liquid heat exchange managing unit is internally provided with a plurality of battery cells side by side; two adjacent battery cells in the same liquid heat exchange managing unit are insulated from each other through a battery grating spacing; the liquid heat exchange managing units are connected side by side to form the battery module; a tab protecting cover covers the rear end of the whole battery module; a left side cover and a right side cover are arranged on the two sides of the battery module. According to the battery module, heat management is carried out on each battery cell in the battery module, so that the heat exchange efficiency of the battery cells and the uniformity of temperature among the different battery cells are ensured, the battery module adopts an extensible module structure, and the composition is flexible according to requirements; moreover, the types of components are reduced, so that the assembly technology of a water jacket housing assembly is simple, and the battery module is extremely convenient to use.

Description

technical field [0001] The invention relates to the field of battery modules, in particular to a battery module for powering electric vehicles. Background technique [0002] Electric vehicles, including pure electric vehicles, hybrid vehicles and plug-in hybrid vehicles, have better energy-saving and emission-reduction effects than vehicles that use engines as power. As a power supply system, the battery system is one of the key systems of electric vehicles. Therefore, it is particularly important to design the battery modules in the battery system. [0003] Nowadays, nickel-based batteries and lithium batteries are mostly used in vehicle battery systems. Lithium batteries have more advantages than nickel-based batteries, such as higher energy density and power, long cycle life, no memory effect, and environmental protection. Therefore, lithium batteries is widely used. Due to the characteristics of nickel-based batteries and lithium batteries, they have strict requiremen...

AI Technical Summary

Problems solved by technology

Due to the characteristics of nickel-based batteries and lithium batteries, they have strict requirements on the working temperature. The temperature of the battery itself and the internal temperature of the battery pack are consistent, which seriously affects the service life and discharge power of the battery pack.

Most of the existing battery packs are air-cooled or heated by warm air. The convective heat exchange coefficient of the battery to the air is low, and it is difficult to ensure that the battery pack is in a suitable working range; In other words, this method of external overall heat exchange has a very low heat exchange efficiency for the battery cells in the middle part, and the heat exchange cannot be guaranteed to be uniform, which affects the performance of the battery module.

Images