Battery thermal management device and manufacture method thereof

Abstract

The invention discloses a battery thermal management device and a manufacture method thereof. The battery thermal management device comprises batteries, sleeves, a main body and a plurality of mounting holes, wherein the sleeves are used for accommodating the batteries, and are matched with the batteries in size; the main body adopts a sealed structure formed by an upper cover plate, a lower cover plate and side walls, and is used for accommodating cooling liquid; a liquid inlet and a liquid outlet are formed in the main body; the mounting holes are formed in upper cover plate and / or the lower cover plate; the sections of the sleeves are matched with the mounting holes in size; at least one end part of each sleeve is fixed in the corresponding mounting hole in a sealing manner, so that the outer surfaces of the sleeves are soaked in the cooling liquid; an insulation layer is arranged between the sleeves and the batteries. According to the invention, all the sleeves carrying the batteries are soaked in the cooling liquid, so that the purposes that the longitudinal temperature of the batteries is uniform and the temperature among the batteries is uniform are achieved, and the heat exchange efficiency of batteries is improved.

Description

technical field [0001] The present invention relates to the field of heat exchange equipment for power storage batteries of electric vehicles, gasoline-electric hybrid vehicles, or fuel cell vehicles, and in particular to a battery heat management device and a manufacturing method of the battery heat management device. Background technique [0002] As the power source of electric vehicles, power batteries are a key part of improving vehicle performance and reducing costs. Their temperature characteristics directly affect the performance, life and durability of vehicles. Lithium-ion batteries have large specific energy, long cycle life, and Low efficiency, wide allowable operating temperature range, good low temperature effect and other advantages are currently the preferred power battery. Therefore, it is necessary to maintain the temperature uniformity among each battery while ensuring that each single battery in the battery works within a reasonable temperature range. The ...

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Problems solved by technology

The currently used battery cooling methods are mainly liquid cooling and wind cooling. Wind cooling is to take the heat of the battery away through the exhaust fan through the wind generated by movement. However, this cooling method is not suitable for high discharge rate and high temperature operating environments.

Liquid cooling system such as figure 1 As shown, driven by the water pump D, the cooling liquid flows through the heat exchanger C and the battery heat conduction plate B at the bottom of the battery pack A to dissipate the heat inside the battery, but the heat inside the battery needs to be transferred through the electrodes and electrolytes in the battery It is transferred to the battery heat conduction plate B at the bottom of the battery in the vertical direction, and the heat conduction path is long, resulting in large heat transfer resistance, low heat transfer efficiency, large temperature difference in the vertical direction, and strict requirements on the performance of the external cooling system; and the battery The cooling liquid inside the heat conduction plate B flows through the bottom of each battery pack A sequentially, and the temperature of the cooling liquid flowing through the heat conduction plate B of each battery is inconsistent, resulting in a large temperature difference between the battery pack A and the battery pack A, which cannot be guaranteed Uniformity of temperature from cell to cell

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