New applications of lead‒acid batteries involve higher discharge rates during lifetime. Consequently, ohmic voltage losses in current-collecting system become more important. In this study, 3D numerical modelling methods using COMSOL software have been employed to investigate the effect of grid configuration, lug position, diagonal wire angles and the tapering of wires towards the lug on the performance of the positive plate. This involved modelling the current and potential distribution through grid wires, active material, and adjacent electrolyte to the surface of each grid. The six different grid configurations were Conventional Side-lug, Conventional Middle-lug, Diagonal Side-lug, Diagonal Middle-lug, Double-diagonal Side-lug, and Double-diagonal Middle-lug. Differences in maximum and minimum potential values in each and every model indicated that Double-diagonal Middle-lug grids possess the most uniform potential distribution through the whole grid with just 90 mV difference between the highest and the lowest potential values.
Mr Ali Alagheband Hosseini –
Ali Alagheband Hosseini holds a BSc in Chemical Engineering and MSc in Industrial Engineering. He is the Technical Manager at SST Co. In March 2018, Ali also became the Director of the Engineering and R&D Department at NGKH Co., the largest lead‒acid battery manufacturer in the east of Iran.