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48V 15Ah Integrated In-Tube Hidden Battery Pack
Designed for modern OEM bicycle manufacturers and custom frame integration, the GEB 48V 15Ah In-Tube Hidden Lithium Battery slides seamlessly inside the bicycle down-tube cavity. Powered by 39 high-density Grade-A 21700 cylindrical cells (13S3P, 720Wh), this streamlined system preserves low center-of-gravity handling for enduro and e-MTB mountain bikes. Includes IP65 full silicone perimeter sealing, smart CAN/UART BMS telemetry, and a two-stage hydraulic eject latch.
Description
General Electronics Technology Co., Ltd. is one of the leading manufacturers and suppliers of 48v 15ah integrated in-tube hidden battery pack in China. We are committed to providing high quality custom service and OEM&ODM service to global clients. Please feel free to wholesale durable lithium battery packs in stock here and get quotation from our factory.
Engineering Overview & Quick Assessment
This 48V 15Ah internal downtube battery (13S3P, 720Wh) is designed for OEM frame manufacturers and e-MTB builders using 21700 cells and CAN-Bus communication. Check internal downtube profile dimensions, lock mechanism placement, and connector pinout before sourcing.
Verified Engineering Specifications
| Technical Parameter | Factory Benchmark & Tolerance Range |
|---|---|
| Nominal Voltage | 48.0V (Operating Range: 39.0V - 54.6V) |
| Rated Capacity | 15.0Ah (720.0Wh @ 0.2C discharge) |
| Cell Type & Grade | Grade-A 21700 5000mAh Cylindrical Li-ion |
| Configuration | 13S3P (39 Cells) |
| Continuous Discharge Current | 30A (Continuous) |
| Peak Discharge Current | 60A (≤ 3 seconds pulse) |
| Communication Protocol | CAN 2.0B / UART (Real-time SOC, SOH, temperature) |
| Protection Class | IP65 (Dust-tight and water-jet protected) |
| Enclosure Material | Anodized Extruded Aluminum Alloy Housing |
| Cycle Life | ≥ 1,000 cycles (@ 80% DoD, 0.5C charge/discharge) |
| Certifications | UN38.3, MSDS, CE, EN 50604-1, RoHS |
Motor & Drivetrain Compatibility
Compatible Motor Systems: Bafang M500, M510, M600 mid-drive systems, Brose Drive S Mag compatible OEM downtubes, Shengyi mid-drive motors.
Pre-Installation Check: Requires proprietary internal downtube extrusion cavity. CAD 3D step files and lock bracket toolings available upon request.
Industrial Quality Architecture & Safety
- Automated Cell Sorting & Grading: Every cylindrical cell undergoes automated grading to ensure capacity variance ≤ 1.5% and internal resistance (IR) difference ≤ 2mΩ.
- Precision Pure Nickel Interconnects: Ultrasonic/spot-welded pure nickel strips lower internal resistance, minimize Joule heating during sustained hill-climbing, and prevent thermal runaway.
- Multi-Tier Smart BMS Protection: Real-time hardware monitoring protects against over-charge (4.25V/cell cut), over-discharge (2.8V/cell cut), continuous high-amperage over-current, and short-circuit faults with automatic reset.
- Shock-Resistant Structural Casing: Impact-resistant ABS+PC flame-retardant enclosure (UL94-V0 rated) shields the internal pack from trail debris, road vibration, and accidental drops.
OEM / ODM Customization & Sourcing Workflow
Shenzhen General Electronics Technology Co., Ltd. (GEB) provides complete end-to-end custom battery manufacturing for e-bike brands, distributors, and fleet operators:
Customizable BMS protocols (CAN-Bus, UART, RS485), customized wiring harnesses (Anderson, XT60, XT90-S, waterproof Julet connectors), and tailored discharge profiles.
Fully certified with UN38.3 test reports, MSDS, CE, RoHS, and Sea/Air Dangerous Goods (DG) freight classification for smooth customs clearance worldwide.
Frequently Asked Questions (FAQ)
Q1: How can I verify that this battery will fit my specific e-bike frame?
A: Download the 1:1 scale dimensional drawing or compare the exact enclosure length, width, and height listed in our specification table above with your frame triangle clearance. Ensure a minimum of 15-20mm clearance along the sliding direction for key release.
Q2: What is the sample lead time and mass-production turnaround?
A: Evaluation sample units typically ship within 5 to 7 business days. Mass production batches (100 to 1,000+ units) are fulfilled within 20 to 25 working days depending on cell supply allocation and custom BMS requirements.
Q3: Can GEB customize the battery housing color, branding, and connector pinouts?
A: Yes. We offer laser-etched OEM branding, silk-screened logos, custom color finishes for qualifying order volumes, and custom discharge/charge wiring pinouts tailored to your motor controller.
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