Method for quantitatively detecting electrolyte distribution in battery
A quantitative detection, electrolyte technology, applied in the direction of measurement device, material separation, analysis of materials, etc., can solve the problems affecting the stability of electrolyte composition and high cost, and achieve the effect of simple test method, low cost, and optimized liquid injection volume.
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Embodiment 1
[0052] The specific operation steps for quantitatively detecting the electrolyte distribution inside the battery cell are as follows:
[0053] (1) The electrolyte in the target battery is lithium salt and LiPF 6 , 14.6wt%, the organic solvent is a mixture of ethylene carbonate and dimethyl carbonate, and the weight ratio is 3:7.
[0054] The above target battery was aged at a high temperature of 45° C. for 5 hours, and then the first dismantling treatment was performed to obtain a battery electrode assembly. The above-mentioned first dismantling process includes cutting the metal shell and aluminum-plastic film outside the battery cell, removing the metal shell and aluminum-plastic film outside the battery cell, and obtaining the battery electrode group.
[0055] (2) Take out the above-mentioned battery electrode group and place it horizontally in the glove box; let the above-mentioned battery electrode group stand still in an environment with an external dew point of -40°C, ...
Embodiment 2
[0064] The difference from Example 1 is: the distribution of the electrolyte of the battery aged at 45°C for 10 hours after liquid injection is shown in Figure 5 .
Embodiment 3
[0066] The difference from Example 1 is: the distribution of the electrolyte of the battery aged at 45°C for 15 hours after liquid injection is shown in Figure 6 .
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