Energy Storage Systems Boost Electric Vehicles’ Fast Charger Infrastructure

Electric vehicles (EVs) will gain more market share and eventually take over internal combustion engine vehicles. Direct current (dc) fast charging stations will replace, or integrate, petrol stations. Renewable energies will be used to power them, such as solar and wind. 

To make all entities work together smoothly and to benefit from the renewable sources and zero-emission EVs, energy storage systems must come into the game to make sure we can store and reuse the electrical energy that is generated. Energy storage systems (ESS) are the electrical equivalent of tanks for fuel or storage warehouses for coal. ESS can be used in multiple applications on both residential and industrial scale. 

Features & Benefits

  • Expandable 8-Channel Lithium Ion Battery Tester 
  • Integrated Fast Charging/Discharging Battery Management 
  • Precision Analog Microcontroller for Data Acquisition and Control 
ADI is actively working in all these subsystems to make sure we can sense, measure, connect, interpret, secure, and power all the physical phenomena producing reliable and robust data—data that will be used by high end algorithms to make sure most energy is converted from renewable sources to the loads, in this case the electric vehicles.
Learn more about the ESS installations for the EV charging infrastructure:
Renewables, energy storage, and EV charging infrastructure integration
The ac charging infrastructure, both for private installations and for public ones, is simple but power limited. Level 1 ac chargers work at 120 V ac, delivering at maximum 2 kW; level 2 is capable of 240 V ac and 20 kW and the power conversion from ac to dc is, for both, demanded to the vehicle on-board charger. The ac wall box is rather a metering and protection device rather than a charger. The vehicle on-board charger, for cars, is always rated lower than 20 kW, for cost, size, and weight limitations. 

On the other hand, dc charging enables the possibility to charge the EV at much higher power: level 3 chargers are rated up to 450 V dc and 150 kW, and the newest super chargers (equivalent to a level 4) can go beyond 350 kW and 800 V dc. The upper voltage limit is set to 1000 V dc for safety reasons when the output connector is plugged into the vehicle. While using a dc charger, the power conversion is made in the charging pile, and the dc power output directly connects the charging pile with the car’s battery. This removes the necessity of an on-board charger, with all benefits in reduced occupied space and less weight. 

ADI’s LTC681x and LTC680x products represent the state of the art for battery stack monitors. The 18-channel version is called LTC6813.

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