Cluster-KPIs

OEE(Overall Equipment Effectiveness)-Potential

 

 

 

 


Current estimated OEE:

  • Availability = 77,82 %
  • Performance = 72,98 %
  • Quality = tbd

 

Target OEE:

  • Availability = 77,82 %
  • Performance = 72,98 %
  • Quality = tbd + x%

 

Quality

Product requirements and specifications

  • Energy density, gravimetrically in Wh/kg and volumetrically in Wh/l
  • Power density, gravimetrically in W/kg and volumetrically in W/l
  • Service life, operating service life in cycles and calendar service life in years
  • Environmental conditions or acceptable maximum and minimum temperatures in °C
  • Efficiency in percent

TCO-Potential

TCO = Acquisition costs + Personnel costs + Energy costs + Maintenance costs + Downtime costs + Running costs (e.g., training courses) + Opportunity costs + Costs for operating materials + Disposal costs + Energy efficiency + CO2 balance

Saving potential energy costs:

  • Forming process: The forming process accounts for approx. 9.4 % of the energy costs in the processes considered (packaging to forming).

Current estimated TCO:

  • Current energy consumption of forming process: 15 Ah per 870 mAh cell

Target TCO:

  • Reduction of energy consumption in the forming process by 20 % results in a reduction of total energy costs by approx. 2 % ( )


Project-KPIs

Material consumption per unit

Models can be used to estimate the amount of electrolyte required and to reduce it. In contrast to the active material, a greater potential for reduction is seen here, since the active material has a direct influence on the energy content of the cell. → Contributes to the reduction of production costs (not listed in OEE/TCO)

Current electrolyte consumption:

  • 4 ml per 870 mAh cell

Target electrolyte consumption:

  • 3.5 ml per 870 mAh cell


Energy consumption per unit

The energy consumption per unit can be reduced by optimizing the forming process.

Current energy consumption:

  • 15 Ah per 870 mAh cell

Target energy consumption:

  • 12 Ah per 870 mAh cell

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Variable production costs

The variable production costs are composed of the energy, material, scrap and manufacturing costs.

Current variable production costs:

  • 100%

Target variable production costs:

  • 90%


Literature

Rao et al.: Enhancing Overall Equipment Effectiveness in Battery Industries through Total Productive Maintenance, International Journal of Engineering Research in Mechanical and Civil Engineering (2017)

Pettinger, K.-H.; Dong, W.: When Does the Operation of a Battery Become Environmentally Positive? Journal of The Electrochemical Society 164 (2017)