CATL 3.2V 302Ah LiFePO4 Battery Cell Grade A Prismatic Lithium Iron Phosphate Cell

Product Overview

This is a Grade A CATL 3.2V 302Ah LiFePO4 battery cell — a prismatic cell in a hard aluminium case, built for the people who assemble packs rather than for a display shelf. It goes into industrial UPS cabinets, telecom base stations, off-grid solar banks, small commercial storage rooms and hand-built DIY packs, where what matters is a cell with a known history rather than whatever a broker had that week.

The difference between a good cell and a lower-grade one is usually invisible until month eighteen. Ours come through long-standing relationships with LiFePO4 battery manufacturers including CATL, CALB, EVE and Farasis, so each consignment traces back to a production batch, with capacity and internal resistance held close across the set. In a series string that consistency is the difference between a pack that needs a light top-balance at assembly and one that drifts for the rest of its life.

Cell Specifications

LiFePO4 Chemistry Advantages

• Stable chemistry under abuse. Lithium iron phosphate holds its structure at abuse levels where nickel-rich chemistries release far more heat, which is why LFP is the default for cabinets installed inside buildings. A shorted or over-discharged cell is much less likely to escalate into thermal runaway.
• Long service life. Cycle life is the number that decides whether a pack is still economic in year eight, and this LFP cell is rated for a long, gradual fade instead of the sudden capacity drop that turns a working pack into a problem overnight.
• A flat discharge curve. Output sits close to nominal across most of the working window, so inverters and DC bus regulators see a steady input rather than a slope they have to compensate for all day.
• Low self-discharge. Power loss during standby is small, which matters for backup strings that sit idle for months and then have to deliver full output on the first attempt.
• No heavy metals. The chemistry contains no cadmium or lead and is straightforward to recycle at end of life, a point that now appears in buying requirements for storage projects.
• Predictable cost per kilowatt-hour. Because we buy through established LiFePO4 battery manufacturers instead of spot traders, grade and pricing stay stable from one order to the next, and the per-cycle cost over a decade of service is what the project actually pays.

Grade A vs Grade B Cells

Verifying Grade A Cells

1. Start with the QR code. A genuine A-grade cell carries a clear, readable code that traces to a production batch. A covered, scratched-off or re-printed label is the first warning sign, and it is the cheapest check you will ever run.
2. Inspect the case. Scratches, dents, rust or welding residue point to a salvaged or re-wrapped cell rather than a new one. Look at the terminal faces as well; fresh weld marks on a new cell usually mean it has already been in a pack.
3. Test the numbers. Measure internal resistance and capacity on a sample from each carton, compare the readings with the datasheet, then compare the cells against each other. A wide spread inside one batch is as much of a warning as a single low reading, and it is the spread that ruins a series string.
4. Sanity-check the price. A quote 50%-70% below the going rate for the same model is the oldest warning sign there is. Nobody sells genuine A-grade stock at a loss for long.
5. Ask for the paperwork. Batch reports and grading data separate a real A-grade line from a hopeful one. Established lithium iron phosphate battery suppliers send them as standard, and a seller who cannot produce them is worth a second look.

Dimensions and Operating Envelope

Applications

• Industrial UPS and backup power. Most prismatic cells LiFePO4 integrators order end up in exactly this role: a series string holding a plant, a data room or a hospital wing up long enough for a controlled shutdown instead of an abrupt one.
• Telecom base stations. Base station rectifiers run a constant float and a deep discharge whenever mains fails, which suits LFP far better than lead-acid, and the flat voltage keeps the rectifier out of alarm during the event.
• Off-grid solar and home storage. A bank sized in the tens of kilowatt-hours is the classic 302Ah job, with a BMS and an inverter doing the daily cycling and the cells sitting in a temperature-stable corner of the building.
• Commercial and industrial ESS. In container-scale systems the LFP cell count adds up fast, and cells that match each other closely are what keep a large string balanced without active management hardware.
• DIY powerwalls and custom packs. Builders who want a traceable cell with published specifications, not a grey-market lot with a hand-written label and no batch report behind it.
• RV, marine and light electric vehicle builds. Where the pack has to be compact and the builder can accommodate a rigid prismatic case with proper compression and restraint.

Pack Building Notes

The case follows the same block format as the rest of the 280-314Ah class, so jigs, spacers, busbars and compression plates designed around prismatic cells LiFePO4 builders already use generally carry over. Assemble with the cells clamped or compressed as your fixture design specifies, keep busbar contact faces clean and flat, and torque terminals to the hardware supplier's figure rather than by feel. Top-balance the string before the BMS takes over, fuse each parallel group, and insulate the cases from the rack. The cell is a component; the safety of the pack is decided by the assembly around it.

Brand mixing is the question that comes up most. If your BOM names EVE LiFePO4 cells, treat this one as a comparable option at 302Ah rather than a swap for a different capacity — check the voltage window and the case height against your existing fixture first, and never put a new cell in series with a tired one. A series string is limited by its weakest cell, so an old pack with two new cells in it will behave like the old pack, not like a new one.

Certifications and Documents

• Cell and transport certification. Our batteries are certified with UN38.3, CE, FCC, RoHS, IEC62133 and UL, with other regional certifications as required. Tell us the destination market at quote stage and we confirm which certificates apply to your order.
• Transport paperwork. MSDS, the UN38.3 test report and a cargo transport assessment report travel with the consignment; forwarders and airlines ask for all three before they will load lithium cells.
• Batch and grading records. Capacity, internal resistance and grading data for the production batch you receive, so incoming inspection has something concrete to compare against.
• A document set, not a promise. The file we send is the same set established LFP battery manufacturers issue for the batch, which lets your compliance team file it against the shipment instead of chasing it after the container lands.
• Ask before you commit. Any lithium iron phosphate battery suppliers worth shortlisting will send a sample batch report and certificate copies before the order. We do the same, and we will walk your compliance team through the UN38.3 report line by line if that helps.

Real Customer Reviews

Our growth has come from customers coming back for the next batch, and that is the review we pay most attention to. Pack builders and integrators usually run their own incoming check — a capacity and internal resistance reading on a sample, a QR scan on every cell — and reorder once the numbers line up with the datasheet. We would rather be measured that way than on a page of edited testimonials, which is why we buy only from LiFePO4 battery manufacturers whose cells trace back to a production batch.

When something does not line up, send the reading, the batch code and a photo of the label. A claim with data behind it is usually resolved in one exchange; a claim without it turns into a week of questions. If you would like to speak to a buyer running a similar project before you commit, ask your sales contact about references and we will connect you with a customer whose application matches yours.

Ordering and Delivery

• Quantity. There is no strict minimum order quantity, and small quantities for testing are available. Ask your sales contact about current sample terms and dispatch timing.
• Warranty. Every cell carries a 2-year warranty.
• Shipping terms. FOB, CIF, DAP and DDP are available for most countries. DDP, door to door with duty paid, is the option most of our customers choose.
• Payment and lead time. Terms vary with destination and quantity, so confirm the payment schedule and current lead time with your sales contact before you plan installation work around a delivery date.
• Packing. Cells travel in the original manufacturer carton with terminal protection and insulation between units, the standard practice for prismatic cells. Tell us if your warehouse needs palletised or export-crated packing instead.
• Brand alternatives. If your BOM already names EVE LiFePO4, we can quote the matching model alongside this one so the comparison is like for like on capacity, cycle life and case size.
• Batch matching for repeat builds. When a project runs over several months, send us the batch code you already hold. We will check what the LFP battery manufacturers have released that matches it, so the second shipment does not leave your team re-grading an entire string.
• OEM/ODM. Battery pack OEM/ODM is available. Send your pack drawing, BMS requirement and target quantity, and we come back with cell selection, pack design and a quotation.

Storage & Handling

• Keep cells indoors in the original manufacturer carton, inside the -20 to 45 °C storage window and in a room that stays dry. Condensing humidity is the quiet problem here: it fogs the cases and corrodes the terminals long before the cells ever see a busbar.
• Store them part-charged. A cell parked at roughly half charge ages more slowly than one left at 3.65 V in a warm room, and it should never be left flat, where a slow drain can take it under the low-voltage limit and leave you with a cell you cannot safely put into a string.
• Leave the terminal protection on, keep the cells upright in their cartons, and do not stack heavy items on the case faces. A prismatic cell that has taken a dent stores fine on a shelf and behaves badly once it is built into a pack.
• Write down what arrives: date, batch code and the open-circuit voltage of a sample from every carton. A single cell reading noticeably lower than its neighbours is self-discharging faster than the rest and will unbalance the whole string later.
• Check the voltage again every few months. A LiFePO4 battery cell has a low self-discharge rate, so the readings should barely move; a measurable drop over a quarter is a fault sign rather than normal behaviour.
• Keep one batch together and build from the oldest carton first. Cells that have waited six months and cells delivered last week enter service with different histories, so keep a note of the date on each carton and work through them in order.
• Let the carton come to room temperature before you open it or connect a charger. The charge window on this cell starts at 0 °C, and charging a cold cell plates lithium onto the anode in a way that never recovers.
• Segregate anything damaged in storage. A dented case, a swollen cell or a terminal that has been wet goes into a separate marked box and stays out of the build, even if it still shows a normal voltage.

Quality Control & Inspection

Every order is checked before it leaves us. In-depth partnerships with CATL, CALB, EVE, Farasis and other leading manufacturers give us traceable, original-brand cells, and our team runs a full inspection pass on every shipment, with sampling checks on packaging and labels. Anything that fails is held back, replaced and reported to you before dispatch. You are welcome to send your own inspector or appoint a third-party agency; we arrange access, samples and the documents they need, and the same paperwork travels with the goods.

FAQ