CAPACITY BALANCING BATTERY CELL

[0001] The present invention discloses a capacity balancing lithium based battery cell 100 which includes lithium-ion, lithium-polymer and solid-state lithium batteries. The capacity balancing cell 100 consists of an additional capacity balancing electrode CBE 113 apart from the usual cathode 109 and anode 103 that can provide Li+ to the cathode 109 in case of capacity loss as a result of loss of recyclable Li+, referred to as negative capacity fade (C ) and extracts excess Li+ from the cathode in case of capacity fade due to the loss of electrode active material, referred to as positive capacity fade (C+). The cathode of the disclosed cell 100 consists of a porous electrode substrate and the final wounded prismatic cell consists of three terminals arising out the tabs from the anode current collector 101, porous cathode substrate 107 and the capacity balancing electrode (CBE) current collector 115. A way of determining the type of capacity fade by measuring SOC of the individual electrodes is also disclosed.