Pantograph charging

Example

Use in Lemonergy

Separate compatibility from requested average power.

This is a reference concept. No executable Lemonergy block has been verified for this term.

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Charge acceptance

How much of the current offered to a battery it can actually absorb at a given state of charge and temperature. It falls as the battery fills and as it cools, which is why regenerative braking and fast charging are limited by the battery rather than the source.

Depot charging

Charging a fleet of buses or trucks at the depot, usually overnight at 50–150 kW per vehicle, which keeps cell stress low and lets an energy-management system sequence the chargers against the site’s grid connection.

Electric bus

A battery-electric city or coach bus, with packs of 300–700 kWh on the roof and at the rear, LFP or NMC, charged overnight in the depot or at the terminus by pantograph. Its duty cycle — long hours, deep daily cycles, a twelve-year life — makes battery aging the central engineering question.

Fast charging

Charging intended to replenish a specified amount of energy or state of charge in a short time. There is no universal C-rate threshold: performance depends on cell chemistry, temperature, starting state and power limits. High current can increase heating and lithium-plating risk, requiring appropriate limits.

Opportunity charging

Topping up a vehicle in short, high-power bursts wherever it stops anyway — a bus at its terminus or at stops, a forklift at breaks — instead of carrying enough energy for the whole day. It allows a smaller, lighter battery, at the price of frequent high-rate cycling and of chargers along the route.

VDV 261

The VDV recommendation on charging infrastructure for electric buses: depot charging, opportunity charging with pantographs, interfaces and the energy-management interaction with the vehicle. It builds on the OppCharge and SAE J3105 pantograph specifications.

References & further reading

Further reading on this topic

These sources provide broader context; they are not presented as citations for every statement in this entry.

1. Electric Vehicle Charging Stations

   U.S. Department of Energy, Alternative Fuels Data Center

   Topic background · U.S. charging equipment levels, charging infrastructure and connector context. Regional terminology varies.