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DALY BMS | ENGLISH BLOG ARTICLE
Introduction
Battery-pack design may need to address both cell-voltage differences and future system expansion. The DALY 4th Generation home-storage materials describe optional active balancing and parallel-system functions for LK and LM models. These capabilities should be assessed separately: balancing relates to the cells within a battery pack, while parallel-system functions relate to the connection and operation of multiple packs.
Active balancing: understand the LK and LM options
The supplied LK/LM comparison lists optional active balancing at a peak current of 1A for LK and 2A for LM. Because the feature is marked optional, verify that it is included in the exact ordered configuration. A peak-current figure should not be presented as a guaranteed continuous balancing current or as proof of a particular balancing time, efficiency improvement or increase in battery life.
Optional active-balancing feature; peak ratings differ by model.
What active balancing does
In a series-connected battery pack, individual cell voltages may differ during operation. Active-balancing circuits are designed to move energy between cells or cell groups rather than simply dissipating the selected cell’s excess energy through a passive bleed path. The precise circuit design, activation conditions and operating limits are product-specific. The supplied materials provide peak-current ratings but do not establish a universal balancing time or quantified performance outcome.
DALY BMS hardware assembly.
Parallel expansion: verify pack count and current limits
DALY’s published 4th Generation home-storage information describes parallel expansion of up to 16 battery packs and a parallel current-limiting function with a 10A peak value. The published comparison differentiates the continuous limiting values by model: 2A for LK and 3A for LM. Keep the peak and continuous figures distinct, and confirm that these values apply to the exact hardware and firmware revision being specified. Parallel capability is a system feature; it should not be inferred solely from the presence of CAN or RS485 ports.
Parallel expansion concept shown in DALY product materials.
Plan the complete parallel system
Before designing a multi-pack installation, check the battery chemistry, series configuration, pack voltage, pack compatibility, current demand, protective devices, cable design, communication topology and permitted number of packs. Confirm how the BMS units identify and communicate with one another, and how the combined battery system interfaces with the inverter. Do not use a marketing illustration as a wiring instruction or as approval for an unverified pack combination.
Example 16S wiring reference; use the approved manual for the actual configuration.
Questions to confirm with the supplier
Provide DALY with the battery chemistry and series count, number of packs, per-pack and total current requirements, intended parallel arrangement, BMS model, inverter make and exact model, and required communication protocol. Ask for confirmation of the applicable parallel module, wiring arrangement, current limits and commissioning procedure for that project.
Conclusion
The supplied and published DALY materials identify optional 1A peak active balancing for LK and 2A peak for LM, alongside a parallel architecture described for up to 16 packs. These are model- and configuration-dependent specifications, not a substitute for project engineering. Confirm the current datasheet, approved wiring documentation and exact system configuration before connection or commissioning.
Technical References
Product-specific statements should be checked against the current documentation for the exact model and configuration. The following DALY resources provide product-family and specification context:
· DALY 4th Generation LK and LM BMS product information — https://www.dalybms.com/news/home-energy-storage-bms/
· DALY 4th Generation Home Energy Storage BMS specifications — https://www.dalybms.com/news/home-energy-storage-bms-8s-24v-16s-48v-lifepo4-100a-200a-16-packs-in-parallel-4th-generation/
· DALY Home Storage BMS product family — https://www.dalybms.com/home-storage-bms/
Publication and Rights Notes
· The article text has been restructured and rewritten for clearer editorial expression. This is an editorial risk-reduction pass, not a plagiarism-database certificate or legal opinion.
· Image credit: DALY product materials supplied for this article. Confirm that DALY owns the rights or has a license permitting website/blog use, including any third-party photographer, designer, stock-image or agency rights.
· Confirm the latest SKU, hardware revision, firmware, options and datasheet before publication.
· Specification review: confirm the applicable parallel-pack count and model-specific current-limit values before publication.
https://www.dalybms.com/home-storage-bms/
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