HOW TO PRESENT TESLA’S BATTERY DAY DIALECT | EV NEWS | AUTO REPORTER
Disturbed by kilowatts !? "Can't tell an anode from a cathode?" Here is a simple guide to the dialect likely to be tossed around at Tesla's Battery Day on Sept. 22.
BATTERY CELLS AND BATTERY PACKS :
A TESLA MODEL 3 uses a singular LITHIUM-ION BATTERY pack that houses four smaller modules. Every module contains 700 to 1,000 individual cylindrical cells, shaped much like those in a T.V. remote.
Cells can come in various shapes and sizes, but most have three key elements: ELECTRODES, ELECTROLYTE, AND SEPARATOR.
ELECTRODES STORE THE LITHIUM. The electrolyte carries the lithium ions between electrodes. The separator retains the positive electrode from coming in contact with the negative electrode.
Energy Transfer, in the form of electricity, when discharged from the battery cell when lithium-ion flux from the anode to the cathode, we can call flux from the negative electrode to the positive electrode.
While the cell is charging, these ions flow in the reverse direction, from cathode to anode.
PANASONIC provides cylindrical battery cells to Tesla for the Model 3 And Model Y.
The positive electrodes are built from a combination of NICKEL, ALUMINUM AND SMALL AMOUNTS OF COBALT, CALLED NCA.
COMPARISON BETWEEN L.F.P. AND N.C.A BATTERY PACK
In China, CATL provides Tesla with battery cells in a flat form called prismatic, with various cathode mixture (lithium iron phosphate, or L.F.P.). This material includes no cobalt and is less expensive than Panasonic's N.C.A. chemistry, but does not hold as much energy or provide as much range as the N.C.A. cylindrical batteries the same size or mass.
E.V.'s Battery power :
In electric vehicles, power is shown in kilowatts (kW), while energy is expressed in kilowatt-hours (kWh).
"To have great acceleration in an E.V., you'd want high power density. To have long-range, you'd want high energy density," said electrochemist LEAH ELLIS, co-founder of Sublime Systems.
Tesla's next generation of batteries is assumed to store more energy — and thus allow more excellent vehicle range — while providing more power.
Because L.F.P. battery cells typically cannot store as much energy as N.C.A. cells, vehicles that use L.F.P. cells generally need more of them to accomplish the same range between charges as vehicles powered by N.C.A. cells.
BATTERY RANGE AND IT'S LIFE :
Tesla vehicles currently can drive up to 400 miles between charges with NCA CELLS and nearly 300 Miles with L.F.P. cells.
Tesla has said the new Cybertruck would get up to 500 MILES.
Tesla's next generation of batteries is presumed to have a much longer life: Approximately 1 million miles or more, compared with about 500,000 miles today.
PRICE OF BATTERY PACK :
A lithium-ion battery cell that Prices $100/kWh to produce means a battery pack, with its additional battery management system, cooling system, and other materials, could cost $125-$130/kWh or more.
Today's battery packs prices around $10,000-$12,000, depending on their capacity. Tesla is concentrating on reducing the cost of future packs to less than $6,000, which would put the cell cost at well under $100/kWh.