Heat radiation and heating device of battery pack and control method

Abstract

The invention provides a heat radiation and heating device of a battery pack and a control method of the device. The device comprises a plurality of battery cells, a refrigerant, heat radiators, layered sealing plates, trough type pipelines, a sealing cover plate and a phase-change material, wherein the interior of the device is longitudinally divided into a plurality of layer spaces by the layered sealing plates; the refrigerant is distributed in the layer spaces close to positive terminals and negative terminals of the battery cells; the middle layer space is filled with the phase-change material; when the temperature of the battery cells rises, the vaporized refrigerant conducts heat to the fin radiators on the outer side for air cooling along heat pipes on an upper cover plate of a boxbody; the trough type pipelines distributed in a hollow square manner are arranged among the battery cells and connected at diagonal lines to form a plurality of passages; liquid is filled in the trough type pipelines for liquid circulation cooling or heating; the device is further provided with a temperature detector and a controller; a multistage heat radiation or heating system is activated according to the actual temperature in the box body of the battery pack; and a multi-way combined, uniform and efficient heat radiation and heating effect is achieved.

Description

technical field [0001] The invention relates to the technical field of battery packs, in particular to a heat dissipation and heating device for a battery pack and a control method thereof. Background technique [0002] Due to the increasingly serious environmental pollution in modern society, automobile exhaust is a major factor affecting air quality, and people's awareness of environmental protection is constantly increasing. As a clean energy alternative to fossil energy, the application effect of batteries on electric vehicles has gradually been recognized by the public, making electric vehicles more and more popular. There are multiple battery packs distributed on the battery board of the electric vehicle, and the battery pack is usually connected in series by multiple battery packs to provide power supply for the electric vehicle and store energy continuously at the same time. However, the battery pack is a closed structure, its operating current is large, and the hea...

AI Technical Summary

Problems solved by technology

However, the air cooling effect of the battery pack is uneven, and the internal temperature difference is large, making it difficult to maintain the proper temperature of the battery

In addition, the current efficiency of liquid cooling heat dissipation needs to be improved.

At the same time, there is a large temperature difference between the north and the south of our country, especially in the northern regions in winter, where the outdoor temperature often reaches below zero, and the temperature of the battery is too low, which will also cause great difficulties to start the electric vehicle.

The above problems have hindered the promotion of battery packs and electric vehicles, making it difficult for people to use electric vehicles with confidence

Images