A battery pack heating device

Abstract

The invention provides a battery pack heating device which comprises battery cells, a supporting plate, PTC (positive temperature coefficient) heating columns and a heat conduction plate, wherein a plurality of rows of positioning holes are formed in the supporting plate; the battery cells and the PTC heating column are kept in the positioning holes; the battery cells are arranged in rows; the first row of the battery cells and the adjacent second row of battery cells are alternatively arranged; one PTC heating column is positioned at the leftmost end of the first row of the battery cells, the other PTC heating column is positioned at the rightmost end of the second row of the battery cells; the heat conduction plate is connected between the two PTC heating columns, and is waveform; the side surfaces of the first row of the battery cells are adhered to a position above the wave trough of the heat conduction plate; the side surfaces of the second row of the battery cells are adhered to a position below the wave crest of the heat conduction plate. The battery pack heating device has the advantages of good heating consistency and high safety.

Description

technical field [0001] The invention relates to the field of battery packs, in particular to a battery pack heating device. Background technique [0002] At present, the battery pack heating of electric vehicles mainly adopts: 1 liquid heating; 2 solid heating. Among them, the liquid heating is mainly to heat the cold plate through the liquid cooling system, and the cold plate is in contact with the battery pack for heat transfer; the solid heating is divided into PTC (positive temperature coefficient thermistor) heating and heating wire heating according to the heat source, and at the same time according to the heat exchange medium. Divided into air heating and contact heating. The liquid heating system is huge and takes up a lot of space; the heat transfer efficiency of air heating is low, the heating performance is poor, and the temperature difference is large; contact heating, such as heating film heating temperature, is high and the safety level is low. [0003] PTC c...

AI Technical Summary

Problems solved by technology

[0007] Heating wire heating: heating wire heating usually adopts air heating, which has the same disadvantages as PTC air heating heaters. In addition, the heating wire has a high safety risk. Once the control fails, its temperature will be out of control;

[0008] Etched plate heating: The etched plate adopts contact heating, the heating effect is good, and the temperature rises quickly, but due to its safety risk, once the control fails, its temperature will also be difficult to control

[0009] All in all, there are problems in the prior art for battery pack heating, such as large space occupation, poor temperature controllability, and high safety risks.

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