For an energy system, the higher the power, the more dangerous it is. Lithium ion battery is a typical example. It is fantastic to raise its capacity and lower the danger factor at the same material.
Because current superimpose principle, rendezvous point of current superimpose is close to battery tab. This will lead to uneven current density on the single cell plate, then over heat for some area.
When working, the core of battery temperature is very high. If battery size is larger, temperature differences from internal to external getting larger. Based on thermodynamics second principle, in condition of same external temperature, core temperature of large-capacity batteries will be very high.
Batteryinternal chemistry reaction will cause size change: a larger battery size will possibly deform battery and leads to uneven current change.