Experimental Analysis of Ni-MH High Power Cells

Design and Realization of an Inductive Power Transfer for Shuttles in Automated Warehouses

“…The analysis performed so far allowed the sizing of a storage system on board of the slave based on Ni-MH high power cells. The experimental activity described in [3] confirmed that Ni-MH is able to sustain high power solicitations comparable to those of lithium power-oriented or supercapacitor-based solutions.…”

“…Following the considerations made in the introduction and regarding the replacement of the energy storage system on the shuttle, the project leader [2], after investigating the market, selected a battery pack composed by Ni-MH high power cells [20]. The authors already tested the proposed Ni-MH cells [3], and concluded that, for the considered power solicitations, this technology is fit for the purpose, and competitive with the most common lithium-based solutions.…”

“…Therefore, typical working operations can be represented, and the energy and power fluxes on the powertrain can be obtained. The implemented working cycle is represented in Figure 2, directly taken from [3] and shown here for clarity.…”

“…Other characteristics are given in the next Table 1. According to the main goals of the project, it is of interest to remember that, compared to the original supercapacitor stack, reduction in mass and volume was of about 60% and 90%, respectively [3]. On the other hand, the nominal energy significantly rises up, which guarantees an energy reservoir and reduced state-of-charge (SOC) oscillations.…”

“…However, although in automotive applications this can be classified as slow charging power, for the system under consideration it is more than adequate to guarantee full charging of the slave shuttle, in the order of a few seconds. [3]). The slave moves in y direction while the master is able to move in both x and z directions.…”