AI-assisted catalog illustration based on the supplied series artwork, standardized for visual consistency. Not a photograph or verified appearance of this individual model. BK Energy coordinates sourcing; in-house manufacture is not asserted.
BK ENERGY · SPECIALTY CELLS
BK-LT26650-3400
BK Low-Temperature LFP Cells — model-specific cold-condition evaluation
BK-assigned model identifier, not an LG or SK On product. Supplier material is preliminary; request a signed model specification before qualification.
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MODEL OVERVIEW
BK-LT26650-3400 — Selection & Sourcing
BK-LT26650-3400 is a BK Energy catalog identifier for a 26650-format, 3400mAh low-temperature LFP cell option described in supplied product material. LT is our low-temperature naming convention. These specialty cells are separate from our LG and SK On catalog and are not represented as made by either company.
The model table lists a -50°C to 60°C working range and a separate -30°C to 60°C charging range. Cold discharge capability does not permit charging at the same minimum temperature. Use the model-specific rate limits below rather than the best values promoted for the series.
Pending confirmation: storage conditions, charge voltage and termination, mechanical drawing, capacity test procedure, cycle life and traceable safety reports. The series headline promotes more than 90% low-temperature performance and broad 3–5C capability; it does not override the lower model-table values. Statements about military tests or no-fire performance are not treated as certification.
TECHNICAL REFERENCE
Specifications & Operating Conditions
Read each value with its test conditions. Confirm the applicable document revision before design approval.
| BK model | BK-LT26650-3400 |
|---|---|
| Supplier reference | IFR26650-3.2V-3400 |
| Chemistry | Lithium iron phosphate (LiFePO4 / LFP) |
| Nominal voltage | 3.2 V |
| Listed capacity | 3400 mAh; capacity tolerance and reference test conditions pending confirmation |
| Discharge temperature range | -50°C to 60°C; source table labels this as working temperature, interpreted as discharge alongside its separate charge row; confirm in signed specification |
| Charge temperature range | -30°C to 60°C |
| Maximum continuous discharge | 3C across the listed working temperature range, as stated in the supplied table; thermal and cutoff conditions require confirmation |
| Maximum charge rate at 25°C | 3C |
| Charge rate at low temperature | 0.2C at -30°C; no interpolation to other temperatures |
| Minimum discharge voltage | 2.0 V at 25°C; 1.5 V below 0°C per source table. Do not apply to a pack without approved BMS limits. |
| Internal resistance | ≤20 mΩ; measurement method, state of charge and temperature unspecified |
| Listed charging time at −20°C | 2 h; starting SOC, end SOC and charging profile unspecified; conflicts with a full 0–100% charge at 0.2C: confirmation required |
| Low-temperature discharge capacity ratio | 90% at −40°C; table uses the term discharge efficiency. Reference capacity, current, cutoff and soak time are not specified. |
| Storage temperature | Not provided; request model-specific storage temperature, SOC and duration |
| Dimensions / mass / cycle life | Not provided as model-specific values; verify dimensional drawing, tolerance, mass and cycling report |
Specification basis
Source: 低温磷酸铁锂电芯.docx, embedded model table image3 (18650) or image2 (26650). Series headline is image1. Values remain subject to a signed specification.
APPLICATION REVIEW
What to Check for Your Pack
Application directions for evaluation, not confirmed installations. Measure cold-start and pulse currents, standby consumption, charging opportunities and enclosure temperatures. Qualify the complete BMS, charger, wiring and equipment.
- Energy and load: usable energy, continuous current, peak duration and charging opportunities.
- Mechanical and thermal fit: the exact drawing, connections, enclosure temperature and cooling arrangement.
- Qualification: a test plan based on the finished equipment, including its protection settings and required approvals.
PROCUREMENT DOCUMENTS
Datasheet, Traceability & Certificates
Ask for the specification and drawing that match the offered lot. If your project needs a UN 38.3 test summary, SDS or a particular cell certificate, include that requirement in the enquiry.
BUYER QUESTIONS
Before You Order
Can I charge at the minimum discharge temperature?
No. This table separately lists charging from -30°C to 60°C. Only the stated cold charge point has a 0.2C rate; request the full temperature-dependent charge map and validate cell temperature sensing.
Are the series headline claims guaranteed for this model?
No. This model table lists 3C continuous discharge and 90% at −40°C. Missing test conditions and conflicting headline figures must be resolved in a signed specification; no military certification or absolute safety guarantee is asserted.
What should I include in an inquiry?
Include the BK model, quantity, minimum and maximum cell temperature, continuous and pulse loads, recharge conditions, enclosure constraints and destination. Request an approved specification and applicable reports before production.