48V 13Ah Rear Rack E-Bike Battery Li-ion with Intelligent BMS and Aluminum Alloy Housing — HG-E1047

Overview

The HNF Battery HG-E1047 is a 48V 13Ah rear rack lithium-ion battery pack engineered for electric bicycle repair, upgrades, and OEM assembly applications. Designed to fit the standard rear carrier rack mount used across a wide range of e-bike frame designs, this battery combines high energy density, an intelligent multi-protection BMS, and a robust aluminum alloy housing into a compact, road-ready package.

With a total energy capacity of 624Wh, the HG-E1047 provides sufficient range for urban commuting and light trail use, and its aluminum extrusion body offers passive heat dissipation and structural protection that outlasts plastic-enclosure alternatives in both durability and thermal performance. The integrated key lock, push-button power switch, and separate charging port allow secure, convenient on-bike operation without removing the pack.

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Key Specifications

• Model: HG-E1047
• Nominal Voltage: 48V
• Capacity: 13Ah
• Energy: 624Wh
• Cell Format: 18650 Li-ion
• Housing: Aluminum alloy extrusion
• Mount: Standard rear rack (carrier mount)
• BMS: Integrated intelligent multi-protection
• Charging Port: Separate DC barrel port
• Switch: Push-button power on/off
• Lock: Key lock
• Certification: UN38.3, MSDS
• MOQ: 10 pcs
• OEM/ODM: Available

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High Capacity Density

The HG-E1047 uses high-grade 18650 lithium-ion cells selected for their balance of energy density, cycle life, and thermal stability. At 48V 13Ah, this pack stores 624Wh of usable energy, sufficient to power a 250W hub motor through 40 to 80 kilometers of assisted riding depending on terrain, rider weight, and assist level. The rear rack form factor maximizes internal cell volume by utilizing the full available housing space, delivering more capacity per kilogram than many comparable downtube or frame-integrated designs.

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Intelligent BMS Protection

Every HG-E1047 pack includes an integrated intelligent battery management system that monitors and protects the cell assembly across all critical operating parameters. The BMS provides overcharge protection preventing cell voltage from exceeding 4.2V per cell, over-discharge cutoff at 2.75V per cell to preserve long-term cycle life, overcurrent and short-circuit protection to guard against harness faults, cell balancing to maintain voltage consistency across all series groups, and temperature monitoring to reduce charge and discharge rates under extreme ambient conditions. The BMS communicates pack status through the push-button indicator, providing riders and technicians with a clear system-ready signal before each ride.

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Fast Charging

The HG-E1047 supports fast charging at up to 5A input current via the dedicated DC barrel charging port, allowing a full charge from empty in approximately 2.5 to 3 hours with a compatible 48V charger. The charging port is positioned separately from the discharge connector, enabling convenient on-bike charging without dismounting the pack from the rear rack. The BMS automatically terminates charging when the pack reaches full voltage, preventing overcharge damage even if the charger is left connected.

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Waterproof and Heat Dissipation

The aluminum alloy extrusion housing provides IP54-equivalent splash resistance, protecting the internal cell assembly from rain, puddle spray, and washing. End caps are sealed with gasket material to prevent water ingress at the connector and switch openings. The ribbed aluminum body acts as a passive radiator, drawing heat away from the cell core during sustained high-current discharge and dissipating it across the housing surface. This passive cooling design requires no moving parts and adds no additional failure modes compared to active cooling alternatives.

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Lightweight Design

Despite its 624Wh capacity, the HG-E1047 is designed to minimize pack weight through efficient cell layout and aluminum housing construction. The aluminum extrusion body provides structural rigidity with lower mass than equivalent steel or heavy-gauge plastic enclosures, keeping the overall pack weight competitive with market alternatives at the same voltage and capacity specification.

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Compatibility

The HG-E1047 uses the standard rear rack mounting interface compatible with most common e-bike carrier frames produced by OEM manufacturers across Europe, Asia, and North America. The discharge connector follows standard 48V e-bike wiring conventions. Custom connector types, cable lengths, and mounting bracket configurations are available for OEM customers integrating this battery into proprietary frame designs.

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OEM and Repair Market Applications

The HG-E1047 is well suited to distributors and retailers serving the electric bicycle repair and upgrade market. Aging or degraded factory batteries on 48V e-bike platforms can be directly replaced with this pack, restoring full-rated range performance. For OEM customers, HNF Battery offers custom cell configuration, capacity options from 10Ah to 20Ah in the same housing class, private label printing, and bulk packaging suited to distribution logistics.

Contact us at sales@hnfbattery.com or WhatsApp +86 134-8090-2696 for samples, pricing, or technical consultation.