48V 100Ah 5kWh IP68 Underwater AUV Battery Pack — Depth-Rated to 5000 Meters | 200A Continuous | OEM China Supply

Q1: How is a 5000-meter depth rating achieved, and what enclosure architecture makes this possible at 500 bar ambient pressure?

Standard recreational IP68 enclosures are designed and tested at depths of 1 to 100 meters — ambient pressures of 0.1 to 10 bar. At 5000 meters, ambient pressure reaches approximately 500 bar, a mechanical load that requires a fundamentally different enclosure engineering approach. The primary variables are housing wall thickness and material yield strength, O-ring groove geometry calculated for the compression force required to maintain seal integrity at 500 bar rather than at surface-equivalent conditions, and the selection of sealing compounds that maintain elastic properties under extreme pressure rather than experiencing compression-set failure. Epoxy potting on internal compartments provides a pressure-tolerant secondary barrier that remains effective at depth regardless of housing deformation under load. The declared depth for each OEM program is a project input — we configure wall thickness, material specification, and sealing architecture to the pressure profile of your specific deployment depth. Submit your mission depth and we return the engineering specification with the proposal.

Q2: What does “Tesla-process cell manufacturing” mean in practice, and how does it affect performance at 200A continuous discharge?

Tesla-process manufacturing refers to the production discipline developed for high-volume EV cell manufacturing, applied here to each cell in this pack. The defining characteristics are tight tolerance control on electrode coating uniformity, electrolyte fill volume precision, and controlled formation cycling — the initial charge-discharge sequence that establishes the SEI layer on the anode and determines the cell’s long-term capacity retention behavior. The practical output is cell-to-cell internal resistance uniformity significantly tighter than standard industrial cell production. At 200A continuous discharge across a parallel cell string, internal resistance variation between cells directly determines current distribution — high-resistance cells carry less current and are bypassed by lower-resistance neighbors, creating localized thermal concentration that accelerates degradation in the cells absorbing the imbalanced load. Tighter resistance matching at the cell production level, before pack assembly, reduces this imbalance at the source rather than relying on the BMS to compensate for it.

Q3: What depth range is available for OEM customization, and what is the minimum order quantity?

The customizable depth range for this pack covers 1000 to 5000 meters. Depth specification is a project input that drives enclosure wall thickness, material selection, O-ring groove geometry, and sealing compound specification — parameters that are determined at the engineering proposal stage rather than selected from a fixed menu. Prototype validation orders using existing enclosure tooling proceed at 10 to 20 units. Projects requiring new enclosure tooling for a non-standard chassis geometry involve a tooling cost and lead time discussion at the proposal stage. Full OEM customization covers voltage, capacity, declared depth and submersion duration, enclosure outer dimensions, connector type and pin assignment, and BMS communication protocol. Submit your mission depth profile, vehicle chassis dimensions, and power system specification and we return a technical proposal within 48 hours.

Q4: How does the BMS communicate with the AUV control system, and what telemetry data is available?

The BMS on this pack supports configurable communication protocols — UART, RS485, CAN Bus, and SMBus — to match the communication architecture of the target AUV or robotic platform. Available telemetry output includes pack voltage, cell-level voltage, state of charge estimate, discharge current, pack temperature, and fault status flags. The specific data frame format, baud rate, and protocol variant are configured to match your vehicle’s power management system at the OEM program setup stage. For AUV programs with existing battery management integration, provide the BMS communication specification from your vehicle documentation and we configure the pack firmware to output a compatible data stream. For new vehicle designs, we can advise on protocol selection based on your control system architecture.

Q5: What is the weight and dimensional envelope of this pack, and how is buoyancy managed in an AUV chassis?

Exact dimensions and weight depend on the final enclosure specification — wall thickness varies with declared depth rating, and cell configuration determines internal volume. As a reference, a 48V 100Ah 5kWh Li-ion pack in an aluminum alloy enclosure rated to 1000 meters typically falls in the 18–25kg range depending on cell type and configuration; titanium enclosure options for deeper ratings add material weight against the depth performance gain. Buoyancy contribution is determined by the ratio of pack mass to displaced water volume — for AUV integration, we can provide the enclosure displacement volume alongside the mass figure so your vehicle design team can calculate the net buoyancy effect within the chassis. If your vehicle design requires a specific neutral buoyancy target, specify this at inquiry stage and we can discuss enclosure material and geometry options that move the pack toward the target buoyancy profile.

Q6: What certifications and export documentation are available for research institution and government procurement programs?

UN38.3 transport certification is included as standard and covers all required lithium battery testing for IATA, IMDG, and ADR/RID freight classification. CE certification under the Low Voltage Directive and EU Battery Regulation is available for European market procurement. RoHS compliance documentation is available for restricted substance declarations. For research institution and government procurement programs that require additional documentation — material declarations, country of origin certificates, test reports for specific safety standards, or documentation formatted for institutional procurement compliance — these can be discussed at the proposal stage. We provide full test documentation packages structured for inclusion in procurement technical files and downstream regulatory submissions. For programs with specific national security or dual-use export control considerations, buyers should verify applicable export control classifications for high-capacity lithium battery systems in their jurisdiction before completing procurement.