Simulation method and device for battery heat transfer device in heat pump system

Abstract

The invention provides a simulation method and device for a battery heat transfer device in a heat pump system, and the method comprises the steps: building an evaporation / condensation heat transfer model of the battery heat transfer device according to a geometric model after the initial geometric modeling of the battery heat transfer device; through coupling simulation of a heat conduction differential equation and an evaporation / condensation heat exchange model, a process of cooling a battery through refrigerant evaporation and heating the battery through refrigerant condensation is realized, and simulation of the battery heat transfer device is realized. And outputting the geometric model under the condition that the reference outlet superheat degree and the maximum temperature difference of the battery pack in the battery cooling process and the reference outlet supercooling degree and the maximum temperature difference of the battery pack in the battery heating process meet the battery heat transfer design requirements, and otherwise, carrying out geometric modeling and simulation on the battery heat transfer device again. The simulation optimization design of the battery heat transfer device is realized, the optimization design cost is reduced, the optimization design period is shortened, and the optimization design efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of heat transfer device design, and more specifically, to a simulation method and device for a battery heat transfer device in a heat pump system. Background technique [0002] Battery temperature is an important factor affecting the working performance and service life of the battery. If the battery temperature is too low, the charging and discharging efficiency of the battery will be reduced; if the battery temperature is too high, harmful reactions such as decomposition of electrodes and electrolyte will occur, causing permanent damage to the internal structure of the battery. Under extreme conditions, the battery will explode; uneven temperature in the battery pack will reduce the performance of the battery, and even lead to thermal runaway in severe cases. Therefore, in order to control the battery temperature, the design of heat transfer devices for battery cooling or heating is very necessary. [000...

AI Technical Summary

Problems solved by technology

However, in the heat pump battery thermal management system, the experimental method is used to determine the geometric modeling parameters of the battery heat transfer device, such as the refrigerant channel size, quantity, and series-parallel scheme, which has high cost and long experiment period, and when the battery number, size, When the spatial arrangement and application scenarios change, the experimental design of the heat transfer device needs to be re-designed, which undoubtedly further increases the difficulty of the experiment and prolongs the experiment cycle

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