Method for testing the liquid absorption rate of new rare earth power cells

Abstract

The invention belongs to the technical field of hydrodynamic batteries and specifically relates to a method for testing electrolyte uptake of a rare earth new power supply core. The method comprises the steps of determining the weight of the rare earth new power supply core, installing the rare earth new power supply core into a battery case, sealing a top cover, additionally installing a safety valve, weighing together, switching on the safety valve, injecting liquid under normal pressure, sealing an opening, weighing, forming and activating according to an existing forming technology, weighing, standing, switching on a rotary valve under inert gas normal pressure atmosphere, pouring flowing electrolyte in the battery case, weighing the poured-out electrolyte, then adding electrolyte, weighing the added electrolyte and calculating out the electrolyte uptake. The method disclosed by the invention can obtain two results, and error calculation can be performed to improve the accuracy rate. The method disclosed by the invention can conveniently measure actual data of the electrolyte uptake of the rare earth new power supply core under the condition without changing technological conditions and technological processes of a battery manufacturing technology; furthermore, the method has small error, good repeatability, simpleness, easiness, practicability, high universality and convenience in actual operation.

Description

technical field [0001] The invention belongs to the technical field of water system power batteries, and in particular relates to a method for testing the liquid absorption rate of rare earth new power supply batteries. Background technique [0002] Rare earth new power supply A new type of water system power battery with rare earth new materials as the main application feature. As a new type of energy carrier, it has become a research hotspot in the battery industry and represents the development direction of water system power batteries. Because the rare earth new power supply has the advantages of high power, long life, environmental friendliness and recyclability, wide temperature range, safe use, and no memory effect, it is called a new generation of green batteries. In today's energy shortage and environmental pollution, rare earth new power sources show broad application prospects. [0003] Rare earth new power supply is an important chemical power source for vehicle...

AI Technical Summary

Problems solved by technology

In order to design a new high-performance rare earth power supply, we need to accurately know the liquid absorption rate of the cell. According to the traditional evaluation method, up to now, physical methods have been used to absorb hydrogen at high pressure and discharge hydrogen at low pressure. By measuring the abundance of rare earth alloys Volume change, to indirectly estimate the volume expansion rate of the negative electrode piece; The weight of the pole piece can be used to obtain the amount of electrolyte required for the pole piece, plus the theoretical liquid absorption of the diaphragm, to obtain the required liquid absorption and liquid absorption rate of the battery. These data are measured separately or indirectly estimated outside the battery. Yes, this test method can measure the liquid absorption rate of the battery core to a certain extent, but the results of this test are different from their liquid absorption rate in the real working environment of the battery, and it cannot reflect the impact of the real environment on the battery. Effect of Wicking Fluid

In addition, the existing methods still have the disadvantages of large fluctuations in measurement data, poor reproducibility, inconvenient operation, high material consumption, and easy cross-contamination.

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