Cell Configuration Guide for 24V 36V 48V and 72V Industrial Battery Packs
Learn how LiFePO4 battery cells are configured in series and parallel for 24V, 36V, 48V and 72V industrial battery packs, and how voltage, capacity, BMS rating, charger voltage, wiring harness and equipment controller must be matched before sample production.
Quick Answer
LiFePO4 cell configuration is mainly defined by series count and parallel count. Series connection determines pack voltage; parallel connection determines capacity, energy and current capability.
- Choose series count: 8S for 24V, 12S for 36V, 16S for 48V and 24S for 72V LiFePO4 packs.
- Choose parallel count: increase Ah capacity and current capability by connecting battery cells in parallel.
- Calculate voltage window: match nominal voltage, full-charge voltage and low-voltage cut-off.
- Match BMS and charger: use the correct S-count, charge voltage and protection settings.
- Validate the whole system: battery cells, BMS, busbars, cables, connectors, fuse, charger and equipment controller.
Why Cell Configuration Matters in Industrial LiFePO4 Packs
Cell configuration is one of the first engineering decisions in an industrial LiFePO4 battery project. It defines the battery voltage platform, available energy, discharge current capability, charger voltage, BMS architecture, cable layout and compatibility with the equipment controller. A correct configuration helps the battery pack work as part of the machine, not just as an isolated energy block.
For OEM equipment such as floor cleaning machines, AGV/AMR, aerial work platforms, golf carts, low-speed electric vehicles, marine systems and industrial service vehicles, the same nominal voltage can still require different pack structures. A 48V pack for a compact scrubber, for example, is not automatically the same as a 48V pack for a high-current industrial vehicle.
Series connection determines voltage. Parallel connection determines capacity.
In a LiFePO4 battery pack, connecting battery cells in series increases voltage. Connecting battery cells in parallel increases Ah capacity and current capability. For industrial projects, the final pack must also match BMS protection settings, charger voltage, cable current rating and connector layout.
OEM design risk
If the cell configuration is selected too early without checking the controller, charger and current path, the prototype may fit mechanically but fail during charging, acceleration, communication or thermal validation.
Common LiFePO4 Series Configurations for 24V, 36V, 48V and 72V Packs
LiFePO4 battery cells are commonly calculated with a nominal cell voltage of about 3.2V and a full-charge voltage of about 3.65V per cell. The actual pack voltage window depends on BMS settings, charger profile and equipment controller limits.
Used where compact size, moderate power and simple charging integration are important.
Common in medium-duty equipment where more power is needed without moving to 48V.
A very common industrial platform for motive power, cleaning machines and AGV systems.
Used for higher-power drive systems, aerial work platforms and larger electric vehicles.
| Nominal Pack Class | Typical LiFePO4 Series Count | Nominal Voltage | Approx. Full-Charge Voltage | Common Industrial Applications | Design Notes |
|---|---|---|---|---|---|
| 24V | 8S | 25.6V | 29.2V | Small floor cleaning machines, compact carts, medical carts, portable industrial equipment | Check charger voltage and low-voltage cut-off when replacing lead-acid batteries. |
| 36V | 12S | 38.4V | 43.8V | Medium floor scrubbers, service carts, compact motive power systems | Controller voltage window and charger compatibility should be confirmed early. |
| 48V | 16S | 51.2V | 58.4V | Industrial equipment, AGV/AMR, floor cleaning machines, low-speed vehicles, UPS-style equipment platforms | One of the most common OEM platforms; current path and BMS settings are critical. |
| 72V | 24S | 76.8V | 87.6V | Aerial work platforms, scissor lifts, golf carts, LSEV, high-power industrial vehicles | Higher voltage requires stricter attention to insulation, service disconnect and controller limits. |
Series and Parallel: The Core Logic
A battery pack configuration is usually written as “S” and “P”. “S” means series count, which determines voltage. “P” means parallel count, which determines capacity and helps increase discharge current capability. For example, a 16S2P pack uses 16 cell groups in series and 2 battery cells in parallel in each group.
Nominal Pack Voltage = Cell Nominal Voltage × Series Count
Pack Capacity (Ah) = Cell Capacity (Ah) × Parallel Count
Pack Energy (Wh) = Nominal Voltage × Pack Capacity
What series configuration determines
- Nominal pack voltage
- Full-charge voltage
- Low-voltage cut-off range
- BMS cell count
- Charger output voltage
- Equipment controller compatibility
What parallel configuration determines
- Pack Ah capacity
- Total energy in Wh or kWh
- Discharge current margin
- Runtime under load
- Thermal load distribution
- Pack size, weight and cost
Example Configurations for Industrial Battery Packs
The following examples show how series and parallel configuration affect voltage and capacity. Actual OEM projects must also check battery cell model, current rating, BMS setting, charger profile, enclosure design and validation test results.
| Example Pack | Battery Cell Example | Configuration | Nominal Voltage | Pack Capacity | Approx. Energy | Typical Use Case |
|---|---|---|---|---|---|---|
| 24V 100Ah | 3.2V 100Ah LiFePO4 cell | 8S1P | 25.6V | 100Ah | 2.56kWh | Small cleaning equipment or compact utility devices |
| 36V 160Ah | 3.2V 160Ah LiFePO4 cell | 12S1P | 38.4V | 160Ah | 6.14kWh | Medium floor scrubbers or industrial carts |
| 48V 200Ah | 3.2V 100Ah LiFePO4 cell | 16S2P | 51.2V | 200Ah | 10.24kWh | AGV, AMR, industrial equipment or heavier cleaning machines |
| 72V 280Ah | 3.2V 280Ah LiFePO4 cell | 24S1P | 76.8V | 280Ah | 21.5kWh | Aerial work platforms, LSEV, golf carts or higher-power drive systems |
For a deeper look at voltage, BMS and connector integration on the 48V platform, see our 48V LiFePO4 battery pack design guide for industrial equipment.
Cell Configuration Is Not Only a Math Problem
A configuration may look correct mathematically but still fail in the real machine. Industrial LiFePO4 battery design must connect the cell layout with BMS strategy, busbar design, cable routing, charger voltage, service access and system-level protection.
Electrical checks
- Nominal voltage and full-charge voltage
- Controller voltage range and under-voltage response
- BMS S-count and balancing strategy
- Continuous and peak discharge current
- Charging voltage and charge current
- Fuse, contactor and pre-charge requirements
Mechanical and integration checks
- Cell orientation and compression structure
- Busbar clearance and insulation
- Cable exit direction and service space
- Connector panel layout
- Thermal path inside the enclosure
- Mounting holes, tray fit and vibration resistance
If the equipment has high acceleration, hydraulic lifting or repeated start-stop cycles, cell configuration should be reviewed together with the continuous and peak discharge current calculation.
Matching BMS, Charger and Controller to the Cell Configuration
Once the series count is selected, the BMS and charger must use the same voltage logic. A mismatch between pack S-count, charger voltage and controller voltage range is one of the most common causes of prototype delays in lithium battery replacement projects.
| Design Item | Why It Matters | OEM Review Question |
|---|---|---|
| BMS cell count | The BMS must monitor the correct number of series groups. | Is the BMS 8S, 12S, 16S, 24S or another confirmed configuration? |
| Charge voltage | The charger must match full-charge voltage for the selected S-count. | Does the charger output match LiFePO4 voltage, not lead-acid voltage only? |
| Controller voltage window | The machine controller must accept the battery’s full and low voltage range. | Will the controller report over-voltage or under-voltage errors? |
| Discharge current | Parallel count and battery cell model affect current capability and thermal margin. | Can the pack support both continuous current and peak current? |
| Wiring harness | Power cables, signal wires and communication leads must match pack architecture. | Are cable routing, connector pinout and service access confirmed? |
| Protection hardware | Fuse, contactor and service disconnect must be coordinated with voltage and current. | Does protection isolate faults without nuisance trips during normal peaks? |
Charger matching is especially important when replacing lead-acid systems. For related design checks, see the floor scrubber lithium battery charger matching guide.
Application Differences: 24V, 36V, 48V and 72V Are Not Interchangeable
Each voltage class has a different balance between current, cable size, controller compatibility, safety requirements and equipment performance. Higher voltage can reduce current for the same power, but it also increases requirements for insulation, service access and controller compatibility.
| Voltage Class | Where It Fits Best | Key Engineering Focus |
|---|---|---|
| 24V | Compact equipment with moderate power demand | Runtime, charger replacement and limited installation space |
| 36V | Medium-duty cleaning machines and industrial carts | Controller compatibility and enough capacity without oversized pack volume |
| 48V | Industrial equipment, AGV/AMR, larger scrubbers and LSEV platforms | BMS current rating, connector selection, communication and charging interface |
| 72V | Aerial work platforms, golf carts, high-power LSEV and industrial vehicles | Insulation, service disconnect, peak current, thermal design and safety validation |
For equipment-level project planning, start from the correct motive power battery application and then define voltage, capacity, BMS, cable harness and connector interface around the machine.
OEM Cell Configuration Review Workflow
Before sample production, Chalongfly recommends reviewing cell configuration through a complete OEM workflow. This helps prevent late-stage changes to BMS, charger, enclosure, harness or connector design.
For packs that require custom cable exits, connector panels, communication wires or service leads, the battery wiring harness should be designed together with the pack architecture instead of being added after the cell layout is fixed.
How Chalongfly Supports Industrial LiFePO4 Pack Configuration
Chalongfly supports OEM/ODM industrial LiFePO4 battery pack projects from voltage platform selection to sample validation. Our engineering review can cover battery cell configuration, BMS strategy, enclosure structure, cable harness routing, connector interface, charger matching and production quality control.
What OEMs should provide
- Original battery voltage and capacity
- Motor/controller specifications
- Runtime target and duty cycle
- Continuous and peak current demand
- Charging method and charger requirements
- Battery compartment drawings and connector position
What Chalongfly can review
- Recommended S/P battery cell configuration
- BMS current and protection logic
- Charger voltage and communication requirements
- Busbar, cable and connector current path
- Steel case or custom enclosure design
- Prototype test plan and production inspection
To start an engineering review, visit our OEM/ODM battery pack service. For production validation and inspection capability, see quality control. Technical files can also be organized through our datasheets section.
Need help selecting the right LiFePO4 cell configuration for your equipment?
Send your target voltage, runtime, motor/controller data, battery compartment drawings, charger requirements and current demand. Chalongfly can help review the series-parallel configuration, BMS, cable harness, connector layout and validation plan before sample production.
FAQ: LiFePO4 Cell Configuration for Industrial Battery Packs
What is LiFePO4 cell configuration?
LiFePO4 cell configuration describes how battery cells are connected in series and parallel inside a battery pack. Series connection defines voltage, while parallel connection defines capacity, energy and current capability.
What series count is used for a 24V LiFePO4 battery pack?
A 24V LiFePO4 battery pack is commonly configured as 8S, with a nominal voltage of 25.6V and an approximate full-charge voltage of 29.2V.
What series count is used for a 48V LiFePO4 battery pack?
A 48V LiFePO4 battery pack is commonly configured as 16S, with a nominal voltage of 51.2V and an approximate full-charge voltage of 58.4V.
Does parallel connection increase voltage?
No. Parallel connection increases capacity and current capability. Voltage is increased by connecting battery cells in series.
Why does charger voltage need to match cell configuration?
Charger voltage must match the full-charge voltage of the selected series count. If the charger voltage is wrong, the pack may undercharge, overcharge, trigger BMS protection or create compatibility problems with the equipment.
What information should OEMs provide for cell configuration design?
OEMs should provide system voltage, runtime target, motor/controller specifications, continuous and peak current demand, charger requirements, battery compartment drawings, connector position and communication requirements.
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