Battery cooling system and electric vehicle battery cooling management system

Abstract

A battery cooling system comprises single batteries and a heat conduction pipe, wherein the heat conduction pipe is arranged among the single batteries, a heat conduction working medium is injected to the interior of the heat conduction pipe, the heat conduction pipe comprises an outer sleeve pipe and an inner sleeve pipe, an external passage is formed between the outer sleeve pipe and the inner sleeve pipe, the interior of the inner sleeve pipe is provided with an internal passage, one end of the outer sleeve pipe is sealed, the internal passage is connected with the external passage, and the flow directions of the heat conduction working mediums in the internal passage and the external passage are opposite. The battery cooling system also comprises a phase change heat storage material, and the phase change heat storage material fills the gap among the single batteries and the heat conduction pipe. Heat generated during the usage process of the batteries is firstly dissipated through the phase change heat storage material, the circulated heat conduction working medium in the heat conduction pipe then enters a cooling system after heat absorption, and meanwhile, the low-temperature heat conduction working medium is supplemented to the inner sleeve pipe. The invention also provides an electromobile battery cooling management system. In the electromobile battery cooling management system, a temperature detector is arranged outside the single batteries, an acquisition end of a controller is connected with the temperature detector, an execution end of the controller is connected with a cooling device, and thus, real-time control on cooling of the single batteries is achieved.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a battery heat dissipation system and an electric vehicle battery heat dissipation management system. Background technique [0002] Electric vehicles mainly use battery packs as power devices. The battery pack needs to be charged and stored by the outside world, and then provide power to the electric vehicle. The battery pack works by repeatedly charging and discharging. When the battery pack is charged and discharged, the current is relatively high, often accompanied by exothermic reactions, resulting in an increase in the ambient temperature of the battery. A higher temperature will accelerate the harmful reaction rate of the battery pack, easily damage the plates, and easily cause overcharging, seriously affecting the service life of the battery pack. [0003] In view of the above problems, those skilled in the art adopt a heat dissipation structure outside the sing...

AI Technical Summary

Problems solved by technology

However, in the above technical solution, the cooling medium flows in one direction, which leads to a slow cooling rate of the part of the unit battery located in front of the flow direction, and it is necessary to increase the flow rate of the cooling medium to improve the cooling effect

This leads to the need to increase the amount of cooling medium used or to increase the heat dissipation rate of the cooling medium outside the battery pack, so that the pipeline for storing the cooling medium is too long or the volume of the external cooling device is large

[0004] It can be seen that the battery heat dissipation system in the prior art has the following defects: the cooling efficiency of the cooling medium flowing in one direction in the heat dissipation pipe is low, and then it is necessary to lengthen the cooling medium pipeline or increase the volume of the external heat dissipation device to increase the flow of the cooling medium to the outside. Heat dissipation speed, resulting in a large space for the cooling system

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