Battery PACK box structure capable of conducting heat, exhausting air and resisting water

Abstract

The invention discloses a battery PACK box structure capable of conducting heat, exhausting air and resisting water. The battery PACK box structure comprises a box body capable of accommodating a battery and a box cover; the box cover covers the box body in a sealing manner; an air guide sheet made of a corrosion resistant PP material is inlaid into the box cover and can exhaust air in the box body outside the box body from the air guide sheet at a set pressure; the box body and the box cover are made of a corrosion resistant PP carbon fiber composite; and the air guide sheet is welded with the box cover through high frequency. The design has the advantages that hot air generated by the battery box can be effectively ensured to be automatically exhausted outsides from the interior of the box body at the set pressure, the condition that the battery box cannot work caused by overlarge internal pressure is solved, an effective space of mounting a battery is increased, and the effective size of the battery box is smaller; and in addition, the air guide sheet and the box cover are fixed together through high-frequency welding, so that fixation is convenient, the fastness is good, the battery box is lighter in weight and is more practical, the energy density ratio is effectively increased, and the utilization ratio of an inner cavity of the box body is also larger.

Description

technical field [0001] The invention relates to the technical field of manufacturing an air guide and heat conduction device in a battery box, in particular to a battery PACK box structure capable of heat conduction, exhaust and waterproof. Background technique [0002] The most important core of an electric vehicle is the battery. Today's electric vehicles all use lithium batteries. The batteries are connected in series by battery boxes, and each battery box is composed of battery cells connected in series and parallel. BMS is a battery management system that monitors the voltage of each battery cell and the entire vehicle, and detects the temperature and voltage of the battery cell. When the voltage of each battery cell exceeds 4.2V, it will alarm, and the BMS will automatically cut off the power supply. stop working. PACK is the battery box, and BMS+PACK is a combination, a combination to provide power to the car more effectively and safely. Just like motor and electron...

AI Technical Summary

Problems solved by technology

But the box body of existing PACK battery box is made of metal material, not only cost is high, and weight is heavy, thereby the weight of electric vehicle is increased correspondingly, and promptly power consumption rate is also big; The exhaust in the PACK battery box is realized through the exhaust valve, but the installation of the exhaust valve will occupy the space in the battery box, which not only invades the packing and fixing space of the batteries in the battery box, but also makes it difficult to install the battery pack. If the battery pack is installed, the volume of the battery box will increase, which will also increase the volume for electric vehicles, that is, the energy density ratio will be greatly reduced, and the practicability is not good enough, so its structure still needs to be improved.

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