Waterproof Lithium Battery

• Power versus energy. Kilowatts describe how fast energy is delivered. Kilowatt-hours describe how much is stored. This pack stores about 3.3kWh and can deliver about 5.9kW continuously.
• Ah versus Wh. Amp-hours count charge, and watt-hours count energy. Multiply amp-hours by voltage to move from one to the other.
• Rated versus measured voltage. A battery's voltage moves with its state of charge, so one reading never equals the rated figure at all times.

A LiFePO4 cell sits near 3.2V, so twenty-three of them land exactly on 73.6V. Cells of this type are known for a fairly flat voltage curve through the middle of a discharge, which gives a controller a steady supply, and for good thermal stability among lithium chemistries.

Cycle life depends on how the pack is used, and no figure is stated here. If your project needs data, ask us.

• Voltage envelope. Build the controller and DC bus for the full working range in the sheet, remembering that the top of that range appears at the end of charging.
• Current envelope. Treat the routine figure as everyday load and the highest sustained figure as a ceiling. No peak rating is specified, so discuss short bursts with us first.
• Charging. Pair the pack with a charger set to the full-charge voltage and capped at the highest sustained charge current.
• Data. Name the protocol you want in your first message, because the interface supplied depends on the project.
• Mounting. Size the brackets for the tolerance and mass given above.
• Climate. Charge only inside the charging temperature range. Discharge is allowed across a wider span.

• LFP: lithium iron phosphate, the cell chemistry inside the pack.
• BMS: battery management system, the electronics that watch the cells and protect the pack.
• CAN: a vehicle data bus that lets the pack, controller and dashboard exchange messages.
• RS485: a wired serial standard commonly used for equipment links.
• Wh and Ah: watt-hours of stored energy and amp-hours of stored charge.
• 23S3P: the number of cells in series (S) and parallel strings (P).

Before approving a design, ask your supplier to confirm these in writing:

• Drawing. A dimensional drawing with mounting references.
• Pinout. Connector type, pin assignment and cable length.
• Protocol. The communication protocol document for your chosen link.
• Charge profile. The charging profile your charger must follow.

Voltage this high deserves respect. Follow these habits during installation and service:

• Isolate. Switch everything off and disconnect before touching any wiring.
• Protect yourself. Use insulated tools and take off metal jewelry.
• Use trained staff. Leave installation to qualified technicians.
• Look after the pack. Keep connectors clean and dry, and never charge a damaged pack.

Multiplying the case dimensions gives roughly 17.1 litres of volume. Dividing the rated energy by that volume gives about 194Wh per litre, and dividing it by the mass gives about 120Wh per kilogram. Tolerances and the clearance around the case are left out of these figures.

Buyers who want more runtime have two routes, and they differ a lot in effort.

• Route one, more Ah. Adding parallel strings raises the Ah rating while the system voltage stays the same. The controller can usually stay, but the case grows.
• Route two, more volts. Adding cells in series raises the voltage. This changes motor and controller requirements, so it is a larger design step.

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45° side view of the product

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FAQ

Q1: How do I estimate runtime?

Divide 3,312Wh by your motorcycle's average power draw, as the runtime table shows.

Q2: Is 84V the voltage of this battery?

No. The pack reaches 84V only at the end of a charge. Its rated voltage is 73.6V, and the reading falls as the pack empties.

Q3: What is the heaviest sustained load it can take?

80A, which equals roughly 5.9kW at rated voltage. Short peaks are not specified.