3.2V 15Ah LiFePO4 Battery Pack for Industrial Pipe Inspection Cameras
Industrial pipe inspection cameras have to work in some of the worst conditions for battery packs: underground lines that are dark and crowded, water that doesn’t move, and inspection runs that last hours with no way to switch packs in the middle of the job.
When the battery gives out early — or worse, gives out without warning — the cost isn’t just a discharged cell. It’s a rescheduled crew, a re-mobilized truck, and a customer asking why the job stalled halfway down the pipe.
A manufacturer of pipe-inspection crawler systems came to CMB with exactly this problem: an existing battery that fit the tool housing but couldn’t reliably power the camera, lighting, and drive motor together for a full shift, and gave operators no real way to know how much run time was left. Working from the customer’s electrical and mechanical constraints, CMB’s engineering team developed a custom 1S1P 3.2V 15Ah LiFePO4 battery pack (CMB01010259) built around a single high-capacity 32140 cylindrical cell and a smart BMS with I²C communication for real-time state-of-charge reporting.
Pipe Inspection Camera Customer Overview
The customer’s crawler systems are deployed by municipal and industrial inspection crews to survey underground pipeline runs that can extend for hundreds of meters. The equipment carries a camera head, LED lighting array, and a drive motor on a single pack, all powered from a housing with strict diameter limits so the crawler can pass through standard pipe fittings. Because the tool is out of sight and out of reach for the length of the run, accurate remaining-runtime data and dependable simultaneous power delivery are not convenience features — they determine whether an inspection finishes or has to be aborted and re-run.
For a crawler tool that runs out of sight for the length of an inspection, these are not convenience features — they determine whether the job finishes or has to be aborted and re-run.
No Warning Before the Battery Dies
Voltage-based indicators can’t track LiFePO4’s flat discharge curve, so crews only learn the pack is empty when the crawler stalls mid-pipe.
CMB Solution:
An I²C smart fuel gauge reports live SoC, voltage, current, and temperature throughout the run.
Simultaneous Loads Cause Voltage Sag
Camera, LED lighting, and drive motor draw power together; motor start-up spikes can trip under-voltage cutoff on undersized packs.
CMB Solution:
8A continuous / 16A burst (≤200ms) discharge absorbs combined loads and motor inrush current.
No Room for a Bigger Pack
Crawler housings are sized to pass through standard pipe diameters, leaving no margin to fix a shortfall by adding cells.
CMB Solution:
A single 32140 LiFePO4 cell delivers the full 15Ah rating without parallel groups or added bulk.
Daily Cycling Wears Packs Out Fast
Crews recharge between every job, and fast-degrading chemistries drive up replacement costs across a fleet of tools.
CMB Solution:
LiFePO4 rated for ≥2000 cycles at ≥70% capacity retention supports years of daily use.
Faults Are Harder to Catch Underground
Damp, confined pipelines are the hardest place to react safely to a fault — the tool is out of reach and out of sight.
CMB Solution:
Smart BMS with full overcharge, over-current, short-circuit, and NTC protection, plus LiFePO4’s thermal stability.
Compliance Has to Be Provable
Procurement teams need documented compliance before approving a tool for field deployment, not marketing claims.
CMB Solution:
Built to GB 31241-2022, with UN38.3 and ISO 9001 held certifications; UL support available upon request.
3.2V 15Ah LiFePO4 Battery Pack Design (CMB01010259)
Product Highlights
- Configuration: 1S1P — single 32140 cylindrical LiFePO4 cell, CMB-validated cell selection
- Nominal voltage / capacity: 3.2V / 15Ah @0.2C (minimum capacity 14.5Ah)
- Max continuous / burst discharge: 8A continuous, 16A burst ≤200ms
- Communication: I²C serial communication for real-time smart fuel gauging
- BMS protection: Full protection suite — overcharge, over-discharge, over-current, short-circuit, NTC temperature monitoring
- Dimensions: Max Ø34mm × 147mm, lead length 200±10mm
- Cycle life:≥2000 cycles @≥70% capacity retention
- Weight:About 0.3kg
- Standards compliance:GB 31241-2022; UN38.3 and ISO 9001 held certifications, UL certification available/supported upon request
| No. | Item | Parameter | Remark |
|---|---|---|---|
| 1 | Nominal Voltage | 3.2V | 3.2V/Cell |
| 2 | Nominal Capacity | 15Ah | @0.2C |
| 3 | Minimum Capacity | 14.5Ah | |
| 4 | Shipment Voltage | / | |
| 5 | Initial Internal Impedance | ≤120mΩ | AC 1KHZ |
| 6 | Standard Charge Voltage | 3.65V | 3.65V/Cell |
| 7 | Standard Charge Current | 3A | 0.2C |
| 8 | Max. Charge Current | 8A | |
| 9 | Standard Discharge Current | 3A | 0.2C |
| 10 | Max. Discharge Current | 8A | |
| 11 | Burst Discharge Current | 16A | ≤200ms |
| 12 | Discharge Cut-off Voltage | 2.3V | 2.3V/Cell |
| 13 | Cycle Life | ≥2000cycles | Retention: ≥70% |
| 14 | Charge Temperature | 0°C~+60°C | Standard Charge |
| 15 | Discharge Temperature | -20°C ~+60°C | Standard Discharge |
| 16 | Storage Temperature | -20°C~ +45°C | ≤3 Months |
| 0°C~ +25°C | ≤1 Year | ||
| 17 | Weight | About 0.3 | kg |
| 18 | Special Request | I²C serial communication | |
3.2V 15Ah LiFePO4 Battery Pack FAQs
Is a 32140 LiFePO4 cell the same as an 18650 cell?
No. A 32140 cell is a larger-format cylindrical LiFePO4 cell, roughly 32mm in diameter and 140mm tall, compared to an 18650 cell at 18mm by 65mm. The larger format allows a single 32140 cell to deliver around 15Ah of capacity, whereas reaching the same capacity with 18650 cells would require assembling multiple cells in parallel, adding weld joints, weight, and space inside the tool housing.
What does an I²C fuel gauge provide that a simple voltage-based indicator does not?
A voltage-based indicator estimates remaining charge from resting voltage alone, which becomes inaccurate under load and with LiFePO4’s flat discharge curve. An I²C fuel gauge communicates directly with the host system to report state of charge, voltage, current, and temperature in real time, giving operators an accurate run-time estimate during active use rather than only at rest.
Is this 3.2V 15Ah LiFePO4 battery pack safe for confined, damp pipeline environments?
The pack is built around LiFePO4 chemistry, which is inherently more thermally stable than NMC alternatives, and is paired with a smart BMS providing overcharge, over-discharge, over-current, and short-circuit protection plus NTC temperature monitoring. Pack-level environmental sealing for a specific tool housing is confirmed at the design stage and is available upon request based on the customer’s enclosure design.
Can this battery pack run a camera, LED lighting, and a crawler motor at the same time?
Yes. The pack is rated for 8A continuous discharge with a 16A burst capability for up to 200ms, which covers the combined steady-state draw of a camera, LED lighting, and drive motor along with short current spikes during motor start-up, without triggering under-voltage cutoff mid-inspection.
How many charge cycles can this battery pack handle before capacity drops?
The pack is rated for a minimum of 2000 charge/discharge cycles while retaining at least 70% of its original capacity, tested per GB 31241-2022. For daily-use inspection tools charged once per working day, this supports several years of service before capacity fade becomes operationally significant.
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