High-Current LiFePO4 BMS | 150A-800A | DALY

High-Current LiFePO4 BMS | AGV, Forklift & Industrial 150A-800A

A LiFePO4 BMS for a 200A forklift is not a scaled-up version of a 60A scooter BMS. At 150A and above, MOSFET selection, copper bar geometry, thermal dissipation, pre-charge handling, and connector ratings become the dominant engineering constraints. A BMS that handles 100A reliably can fail catastrophically at 200A under the same load profile if any of these elements were under-specified.

For AGV operators, forklift OEMs, low-speed four-wheel EV manufacturers, and construction machinery integrators, the right BMS is one that has been engineered specifically for sustained high-current operation - not adapted from a lower-current platform. Continuous current rating, peak handling, balancing strategy, and communication interfaces all need to match the application's duty cycle.

Image: https://www.dalybms.com/uploads/G08-2.0.jpg

BMS Selection Map for Industrial and Low-Speed Vehicle Applications

Match the application's continuous current draw and series count to the recommended BMS series. The table below covers the most common industrial deployment scenarios.

Application Class

Typical Current

Series Count (LFP)

Recommended Series

AGV (24V-48V)
100A-200A
8S-16S
AK / AM (Passive) or TK / TM (Active)

Counterbalance Forklift (48V-80V)
150A-300A
16S-24S
AM / AS (Passive) or TM / TS (Active)

Low-Speed 4-Wheel EV (48V-72V)
150A-400A
16S-24S
AM / AS (Passive) or TM / TS (Active)

Construction Machinery (72V-96V)
200A-800A
20S-32S
AS / D Series (Passive) or TS (Active)

Aerial Work Platform (48V-96V)
200A-400A
16S-32S
AS (Passive) or TS (Active)

Image: https://www.dalybms.com/uploads/%E8%AF%A6%E6%83%85_032.jpg

If your application sits between two rows - for example a 72V AGV drawing 250A continuous with brief 400A regeneration peaks - the AS Series at 300A continuous is the correct fit because it absorbs the regeneration spike without entering protection mode while delivering the continuous load with thermal headroom.

right Send pack voltage, continuous current, peak current, and duty cycle for a matched BMS recommendation within 24 hours: [https://www.dalybms.com/high-current-bms-products/]dalybms.com/contact/ [https://www.dalybms.com/high-current-bms-products/]

DALY High-Current LiFePO4 BMS Range [https://www.dalybms.com/high-current-bms-products/]

Five product series cover the full industrial and low-speed vehicle current and voltage map. AM and AS are positioned for the 150A-400A range with passive balancing at 100 plus-minus 30 mA; TM and TS cover the same 150A-400A range with active balancing at peak 1000 mA - the choice between passive and active in this range depends on cycle frequency, charge profile, and target service life rather than on budget tier. The D Series is a separate, parallel platform engineered for customer programs with continuous-current requirements at 400A and above, covering 400A and 800A ratings together with extended series-count options (up to 32S for 96V nominal packs).

Series

Balancing

Continuous Current

LFP Series Range

Primary Application

AM Smart BMS
Passive 100 plus-minus 30mA
150A / 200A
7-17S / 7-24S
AGV, light forklift, low-speed 4W EV

AS Smart BMS
Passive 100 plus-minus 30mA
250A / 300A / 400A
7-17S / 7-24S
Forklift, low-speed 4W EV, AWP, construction

TM Active Balance
Active Peak 1000mA
150A / 200A
7-17S / 7-24S
Premium AGV, forklift, fleet 4W EV

TS Active Balance
Active Peak 1000mA
250A / 300A / 400A
7-17S / 7-24S
Premium forklift, AWP, high-cycle industrial EV

D Series Smart BMS
Passive 100 plus-minus 30mA
400A / 800A
8/15/16/26/30/32S
Heavy forklift, construction, large industrial vehicles

Application Notes by Industrial Vehicle Class [https://www.dalybms.com/high-current-bms-products/]

AGV and Warehouse Automation (24V-48V, 100A-200A).

AGVs typically run at 24V or 48V LFP packs with continuous current of 100A-200A during loaded travel. Standard duty AGVs select AK or AM with passive balancing for cost optimisation. High-utilisation AGVs running 24/7 in distribution centres select TK or TM with active balancing to maintain pack capacity through the high cycle count. Confirm the AGV motor controller's startup current profile against the BMS overcurrent protection response time during integration design.

Counterbalance Forklift (48V-80V, 150A-400A).

Counterbalance forklift packs face sustained high-current demand from lift, travel, and regenerative braking simultaneously. The AS Series at 300A or 400A is the standard specification for medium-duty forklifts replacing 48V or 80V lead-acid packs. For heavy-duty fleet operators or rental fleets where pack longevity directly affects ROI, the TS Series with active balancing extends usable pack life by maintaining cell uniformity through high cycle counts.

Low-Speed Four-Wheel EVs (48V-72V, 150A-400A).

Low-speed electric vehicles - neighbourhood EVs, golf carts, electric tuk-tuks, sweepers - operate at moderate continuous current with brief acceleration peaks. AM and AS are the volume passive specifications. For shared-mobility deployments where vehicles cycle multiple times per day across the fleet, TM and TS active balancing extend pack service life under the daily cycle load.

Construction Machinery (72V-96V, 400A-800A).

Excavators, loaders, and other electric construction equipment draw 400A and above continuous with substantial peak loads during dig and lift cycles. The D Series at 400A or 800A continuous handles this current class with the cell configurations these applications require - 26S, 30S, and 32S options for 80V and 96V nominal packs. D Series is platform-engineered for heavy industrial deployment, not adapted from lower-current designs.

Image: https://www.dalybms.com/uploads/%E8%AF%A6%E6%83%85_202.jpg

Choosing Between Passive and Active Balancing for High-Current Applications

Within the 150A-400A range covered by AM/TM and AS/TS, balancing strategy is one of the meaningful procurement decisions because pack costs at this current class are substantial and the duty cycle directly affects how long the pack maintains usable capacity. The matrix below is a starting reference for matching balancing type to operating profile; D Series sits outside this matrix as a parallel platform for 400A-and-above programs where the BMS is selected by current and series-count requirements rather than by balancing type. Final selection should account for pack design, cell specification, and controller behavior, and we recommend confirming the configuration with our engineering team before order placement.

Decision Factor

Choose Passive (AM / AS)

Choose Active (TM / TS)

Daily cycling rate
Single-shift or moderate-cycle operation
Multi-shift, high-utilisation, or continuous operation

Charge window
Slow charge, scheduled overnight or off-peak
Opportunity charging or frequent fast-charge cycling

Fleet size
Single units or small fleets
Large fleets where per-pack life affects total fleet cost

Pack cost
Pack replacement cycle aligned with operational planning
Pack life extension is a procurement priority over replacement intervals

Operating environment
Operation within a moderate, stable temperature range
Operation across wide ambient temperature variation

Why Factory-Direct Sourcing Reduces Risk on High-Current Programs

High-current BMS programs carry larger per-unit cost and tighter integration tolerances than two-wheel EV products. Sourcing factory-direct from DALY rather than through a trading channel delivers four risk-reduction advantages:

* Direct engineering access - pre-sale and in-program technical questions resolve with the engineers who designed the product
* Custom configuration support - protection thresholds, pre-charge timing, communication baud rates, and balancing trigger conditions can be programmed at the factory at qualifying volumes
* Production transparency - committed lead times and visibility into the production schedule for delivery planning
* Direct warranty and field engineering - quality issues escalate to the factory engineering team, not to a sales intermediary

B2B Buyer's Frequently Asked Questions

Q: My forklift draws 250A continuous and 380A peak during lift. Which series and what current rating?

A: Specify the BMS at 300A or higher continuous to absorb the 380A peak with thermal headroom - AS at 300A continuous, or TS at 300A continuous if you want active balancing for extended service life. Send the full duty cycle (continuous, peak, peak duration, peak frequency) to our engineering team for a final recommendation that includes the correct pre-charge configuration for your motor controller.

Q: Can the BMS be programmed for a custom CAN bus message ID and baud rate to match our existing AGV controller?

A: Yes. Custom CAN message ID assignment. and broadcast frequency are configurable at OEM order level. Send your existing controller's CAN map document to our technical team and we will return a configuration confirmation before order release. This eliminates the need for protocol conversion hardware in your AGV BOM.

Q: Does the D Series at 800A require liquid cooling or can it run on convection alone?

A: D Series 800A is engineered for natural convection cooling within standard industrial enclosure conditions. For applications running sustained 800A duty in high ambient temperature environments, contact our engineering team to confirm enclosure ventilation requirements before order release.

Q: What certifications are available for export to EU and North America?

A: CE, RoHS, FCC, and EAC are standard across the AM, AS, TM, TS, and D Series. Documentation is provided with each B2B order. For applications requiring additional standards (UL, IEC 62619 for industrial cells, machinery directive compliance), specify the target market when placing the inquiry and we will confirm available certification packs.

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