New Release XJ-D621 8S BMS: 100A–150A High-Cost-Performance BMS for LFP, NMC & SIB Batteries
XJBms is excited to launch the newXJ-D621 dedicated 8S BMS, a cost-optimized, high-current battery management system exclusively designed for 8-series (24V) lithium battery packs. Tailored to meet the massive market demand for standard 8S battery solutions, theXJ-D621 delivers stable 100A–150A continuous charge and discharge performance, multi-chemistry battery compatibility, comprehensive thermal protection, and dual cell balancing functions. Pre-calibrated with professional parameters by our engineering team, this plug-and-play BMS is ideal for low-speed electric vehicles, off-grid energy storage, marine power systems, and industrial heavy-duty equipment, serving as the most cost-effective 8S BMS solution for global manufacturers and battery assemblers.
Core Overview of XJ-D621 8S Dedicated BMS
Unlike universal multi-string BMS that sacrifices partial performance for wide compatibility, the XJ-D621 is fully customized for 8S battery packs, achieving targeted performance optimization and ultra-high cost performance. It adopts a mature common-port design with consistent charging and discharging current, supporting three mainstream battery chemistries: NMC ternary lithium, LFP lithium iron phosphate, and SIB sodium-ion batteries. Our professional engineers will pre-set precise parameters according to the customer’s specific cell type before delivery, enabling users to install and use the BMS directly without secondary debugging.
Key Selling Points & Technical Advantages of XJ-D621
1. Dedicated 8S Design & 100A–150A Stable Current Output
The XJ-D621 is a professional exclusive model for 8S 24V battery systems, with a standard continuous current range of 100A to 150A, perfectly matching the power demand of most medium and high-power 24V devices. The dedicated 8S structural design eliminates redundant circuit design of universal BMS, greatly improving operational stability and cost performance, making it the most cost-effective choice for mass 8S battery pack production and replacement.
2. Common-Port Design with Consistent Charge & Discharge Current
Adopting a reliable common-port charge-discharge integrated structure, the XJ-D621 ensures completely consistent current output during charging and discharging processes. The optimized circuit structure reduces internal resistance and power loss, supports stable high-current operation, and avoids current fluctuation and power attenuation caused by mismatched charge-discharge circuits, ensuring long-term stable battery operation.
3. Triple Battery Chemistry Compatibility (LFP / NMC / SIB)
This new BMS supports three mainstream battery types in the new energy industry: LFP, NMC, and SIB batteries. Whether customers use traditional ternary lithium batteries, widely used lithium iron phosphate batteries, or emerging low-cost sodium-ion batteries, the XJ-D621 can achieve precise matching and full protection. Our engineering team will customize and calibrate professional parameters according to the actual cell type, ensuring optimal battery performance and safety.
4. Dual Balancing System (Active & Passive Balance)
Equipped with a high-efficiency dual balancing solution, the XJ-D621 integrates built-in passive balance and external active balance support. With a balanced current of 30mA to 60mA, it effectively eliminates cell voltage imbalance caused by long-term cyclic charging and discharging, repairs inconsistent single-cell performance, and significantly extends the overall cycle life and usable capacity of 8S battery packs.
5. Ultra-Compact & Lightweight Body
Featuring a streamlined miniaturized design, the XJ-D621 boasts ultra-small dimensions of 161*65*10mm and an ultra-light weight of only 173.8g. The slim and lightweight structure saves valuable internal space of battery boxes, supports flexible embedded installation, and is suitable for various compact battery pack assembly scenarios without occupying extra equipment space.
6. Super High Over-Current Protection (Max 600A)
To cope with instantaneous current surges during equipment startup, climbing, and heavy-load operation, the XJ-D621 is equipped with an enhanced over-current protection mechanism, with a maximum discharge over-current protection of 600A. It effectively resists instantaneous high-current impact, avoids accidental shutdown and board burnout, and greatly improves the stability and safety of heavy-duty equipment operation.
7. Ultra-Low Static Power Consumption (60uA)
The XJ-D621 adopts low-power chip design and optimized circuit layout, with ultra-low self-consumption as low as 60uA. It effectively reduces the static power loss of the battery pack during long-term standby, avoids frequent power loss and battery idle attenuation, and greatly improves the standby endurance of electric vehicles and energy storage equipment.
8. Professional Multi-Point NTC Temperature Protection & Wide Temperature Adaptation
Supporting all-round temperature monitoring and protection, the XJ-D621 is equipped with three pairs of NTC temperature probes: one pair for MOS tube temperature monitoring and two pairs for external battery temperature detection, realizing full-coverage temperature sensing of the battery system. It features an ultra-wide working temperature range: the maximum charging high temperature reaches 50℃, the maximum discharging high temperature reaches 70℃, the minimum charging low temperature is 0℃, and the discharging low temperature can be as low as -20℃. It adapts to high-temperature outdoor operation and low-temperature cold environment use, meeting global all-weather application needs.
9. Pre-Programmed Parameters for Plug-and-Play Use
All XJ-D621 BMS units are professionally tested and parameter-calibrated by our engineering team before leaving the factory. According to the customer’s battery cell type (LFP/NMC/SIB), targeted parameter setting is completed in advance. Customers can install and use the BMS directly after receiving the goods, no need for secondary debugging, saving time and labor costs for battery pack assembly.
Wide Application Scenarios of XJ-D621 8S BMS
Benefiting from high current stability, wide temperature adaptability, multi-battery compatibility, and high cost performance, the XJ-D621 is widely applicable to 24V low-speed vehicles, off-grid energy storage, marine power, and industrial heavy-duty equipment:
1. Low-Speed Electric Vehicles & Mobility Tools
Perfectly suitable for electric tricycles, high-power electric motorcycles, golf carts, scenic sightseeing vehicles, small low-speed four-wheel vehicles, and elderly mobility vehicles. It adapts to frequent start-stop, climbing, and daily high-frequency travel working conditions, providing stable power protection for low-speed transportation equipment.
2. Off-Grid Energy Storage & Vehicle/Marine Power Systems
Widely used in 24V RV and camping energy storage batteries, low-voltage energy storage systems for yachts and fishing boats, household small off-grid photovoltaic energy storage devices, and high-capacity portable outdoor energy storage power supplies. It supports long-term outdoor off-grid power supply and solar cyclic charging, adapting to complex outdoor power scenarios.
3. Industrial & Engineering Heavy-Duty Equipment
Applicable to high-power electric forklifts, 24V warehouse pallet trucks, industrial UPS uninterruptible power supplies, and emergency backup power systems. It also matches heavy-duty garden machinery and engineering equipment including lithium-ion lawn mowers, electric tree diggers, auxiliary power for electric tractors, electric cleaning machines, and high-power lithium air compressors, meeting the high-current and high-stability power demand of industrial heavy-load operation.
Conclusion
The newly launched XJ-D621 exclusive 8S BMS fills the market gap of high-cost-performance and high-stability dedicated 24V battery protection solutions. With exclusive 8S professional design, 100A–150A stable high current, triple battery compatibility, dual balancing system, multi-point NTC temperature protection, ultra-wide temperature adaptation, 600A over-current resistance, and ultra-low self-consumption, it fully covers low-speed vehicles, off-grid energy storage, marine power, and industrial equipment scenarios. Pre-calibrated and ready-to-use, the XJ-D621 is the most reliable and cost-effective 8S BMS choice for global battery manufacturers and equipment assemblers in 2026.
