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At a low temperature, due to its use of an organic electrolyte system, and its active substances having a poor electric conductivity as well, a lithium-ion battery will deliver a relatively poor performance at a low temperature, usually showing the symptoms of the common problem that individual batteries are consistent with each other better at a normal temperature, but showing a big difference in electric performance at a low temperature. Moreover, because of the effect of processing and fabricating techniques, the inconsistency among individual batteries in internal resistance also arises at a low temperature, which cannot be effectively detected at a normal temperature. Therefore, this article has studied the effect of low temperatures on battery recharge and discharge voltages. The results indicate that, with the decrease in temperature, batteries deliver a poor performance on discharge, the discharge curve shows an obviously downward trend, both average discharge voltage and discharge capacity fall somewhat, discharge capacity decreases remarkably, therefore the performance of batteries as a whole decreases faster, and batteries are noticeably less active.

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