In parallel cell circuits within Lithium-ion home storage systems, the components of the circuit have an enormous influence on the load distribution and as consequence on the battery lifetime. Quality spreads within a batch of cells exist also as deviation in the connection quality. This paper presents the impacts of the system components on the load distribution and the ageing in parallel-connected circuits for exemplary module designs of commercial available home storage systems. Experimental and simulated studies show high deviations between the performances and lifetimes of several systems due to the circuit design.
