Mono-cell heating power testing device and method

Abstract

The invention relates to a mono-cell heating power testing device and method. A device shell is made of a thermal insulation material, the deionized water is injected into the shell, a cell is arranged in the device, the surface of the cell is contacted with the deionized water, and a positive electrode and a negative electrode are insulated from the deionized water; three thermocouples are arranged in the testing device, are respectively distributed on the cell surface, in the deionized water and on the shell surface, and used for measuring the temperatures of the cell, the deionized water and the shell; an insulating layer is applied on the external of the device, and the device is placed in a thermostat, the positive electrode and the negative electrode of the cell are connected to a cell charging / discharging facility to perform the charging / discharging test, the temperatures of the cell, the deionized water and the shell in the charging / discharging process are recorded, and the heating power of the mono-cell in the specific temperature and current is computed, the thermostat temperature and the charging / discharging multiplying power are changed, and the heating power of the mono-cell under different temperatures, and charging / discharging multiplying power can be tested. By use of the method and device disclosed by the invention, the heating power of the mono-cell under set temperature and charging / discharging multiplying power can be simply and effectively measured.

Description

technical field [0001] The invention relates to the field of battery thermal management of power batteries for electric vehicles, and in particular to a single battery heating power testing device and method. Background technique [0002] In recent years, electric vehicles have developed rapidly due to the advantages of high energy utilization rate and no pollution. As a key technology restricting the development of electric vehicles, power batteries have always been a hot spot for many production and R&D units to invest in. It also has a significant impact. If the temperature is too high, it may lead to thermal runaway of the battery pack and affect the safety and reliability of the system; in a low temperature environment (such as -10°C or below), the energy and power of most batteries will be reduced, and the vehicle The performance is severely degraded. Therefore, in order to prolong the life of the power battery and improve its electrochemical performance and energy eff...

AI Technical Summary

Problems solved by technology

Existing test methods include accelerated calorimeter (ARC), thermogravimetric analysis (TG), etc., but these methods are expensive and cannot maintain the battery at the set temperature

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