Electric vehicle battery system having heating function

Abstract

The invention discloses an electric vehicle battery system having a heating function. The electric vehicle battery system comprises a box and an upper box cover, wherein the upper box cover is fixedly connected to the top end of the box through bolts in a sealed manner, and a battery formed by multiple columnar cells is arranged in the box; the columnar cells are fixed on a cell rack, the cell rack comprises an upper plate and a lower plate which are parallel, and the columnar cells are vertically fixed between the upper plate and the lower plate; the upper plate of the cell rack is fastened on a mounting plate on the inner wall of the box through bolts; spiral cooling pipes are arranged on the peripheries of the columnar cells respectively, and PTC heating pieces are arranged in the box. When the temperature is higher than a set value, circulating cooling water is introduced into the spiral cooling pipes to cool the cells; when the temperature is lower than a set value, the PTC heating pieces are powered on to increase the temperature in the box. The electric vehicle battery system is provided with a heating device and a cooling device simultaneously, thereby being capable of guaranteeing the constant-temperature state and the efficient stability of the cells.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to an electric vehicle battery system with a heating function. Background technique [0002] At present, due to the energy crisis and the problems caused by air pollution, people are eager to develop new energy that can fully replace traditional petroleum energy. In this context, the power battery should be born. The use of power batteries in automobiles to replace conventional oil and other energy sources can not only alleviate the energy crisis, but also reduce environmental pollution because the power batteries themselves are non-polluting. [0003] With the rapid development of electric vehicles, the performance of power batteries has become the key to the popularization of electric vehicles. However, the power battery is more sensitive to the ambient temperature, which limits its own development and popularization. Take the lithium-ion power battery i...

AI Technical Summary

Problems solved by technology

[0005] The current power battery temperature control system generally uses a fan to blow forced cold air to the battery pack, but this method can only cool the battery pack. When the battery pack is at a low temperature (such as winter), it cannot heat the battery pack.

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