Self-discharge rate of flow batteries

Is self-discharge more urgent than a charged secondary battery?

of self-discharge appears to be more urgent with the latter.A fresh primary battery and a charged secondary battery are in thermodynamic terms in an energetically higher state, i.e. the correspond ng absolute value of free enthalpy (Gibbs energy) is larger. Because discharge is a spontaneous process the values carry a negative sign, a

Does voltage distribution affect battery self-discharge?

The study of battery stability and voltage distribution for individual cells leads to the conclusion that the potential difference at centrally located cells contributes significantly to battery self-discharge. This study is significant for an understanding of the limiting factors for developing VRFB-based grid energy storage.

How does self-discharge affect VRFB battery performance?

Self-discharge gradually drains VRFBs’ energy efficiency, and battery performance depends on its capacity to hold energy during idleness. It can degrade VRFB chemicals and materials, as a result of it shortening battery life. Efforts to reduce self-discharge in VRFBs involve improvements in materials, optimization of design, and system engineering.

How does self-discharge affect battery life?

For single cells, it would suppress the energy output due to the capacity loss, and the accumulation of undesired side reactions would result in excessive cation loss and shorten cycle life. For larger battery packs, the self-discharge will result in inconsistent charging states among cells during charge (Figure 1c).