A kind of salt bridge production method used in low temperature environment

Abstract

The invention discloses a manufacturing method of a salt bridge used in low temperature environment. The mixture in the salt bridge is composed of the following components: a saturated potassium nitrate solution, soluble starch, and diluted sulfuric acid with a density of 1.2 to 1.35 g / cm3 according to a weight ratio of 5-11:4-10:1-5. The salt bridge is made of plastic soft pipe. The manufacture of the salt bridge is simple, the raw material consumption is little, the length of the salt bridge can be adjusted at will, and the soluble starch has good solubility. The salt bridge has the advantages of stable chemical property, strong absorbing force, good fluidity, and proper gelation speed, and can be used in low temperature environment with a temperature of -20 to 0 DEG C, and the test results are precise and stable. Moreover the shortages of conventional salt bridges are overcome.

Description

technical field [0001] The invention relates to the field of salt bridge manufacturing methods, in particular to a salt bridge manufacturing method used in a low-temperature environment. Background technique [0002] For experimental batteries with poor low-temperature discharge capacity, in order to further analyze whether the cause of poor low-temperature performance is the problem of the positive plate or the negative plate, the reference electrode is often used to measure the potential of the positive and negative electrodes, and the relative value is used to determine whether the battery is charging or discharging. The quality status of positive and negative plates can be monitored to improve the analysis of battery capacity and the cause of failure. The current unipolar potential test method is to connect a container externally after punching a hole on the battery case wall, and then add the same electrolyte in the container as the inside of the battery to form a path,...

AI Technical Summary

Problems solved by technology

There are some deficiencies in the traditional manufacturing method: 1. The single size of the U-shaped tube cannot meet the needs of the experiment, and the salt bridge required for the single-cell defect test needs to be intercepted in advance, which brings inconvenience to the production of the salt bridge

2. When the agar is hot, it is easy to leave air bubbles in the U-shaped tube, which will affect the experimental results.

3. Agar is easy to solidify, and the speed of pouring into the U-shaped tube should be fast, so it is inconvenient to infuse

4. Sometimes there will be no gel

5. Infusion while hot will cause the U-shaped tube to rupture

6. If the U-shaped tube is filled after a little cooling, it will appear that the back part has not been filled well, and the front part of the U-shaped tube has solidified

7. If poor-quality agar is used, it is easy to produce insoluble impurities in the preparation process, which is difficult to heat and dissolve, making the preparation of the salt bridge complicated, time-consuming and labor-intensive, prone to failure, wasting experimental time, and making the experimental results lack of scientificity and reliability. sex

Images