BMS boards and protection: the pack's brain
A battery management system board, or its smaller cousin the protection circuit module, is what keeps a lithium pack safe and long-lived. This page presents the boards the company lists, and explains what each one does in general terms.
Layered pack cross-section — the site's recurring diagram motif. It is a schematic, not a photograph of a product, factory or customer project, and it is not presented as a photograph of this company's factory.
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The company describes a battery management system as the brain of a reliable battery pack, designed to improve safety, extend battery life and protect lithium batteries under different operating conditions. In general terms, a protection board watches the pack's voltage and current and interrupts the circuit when a limit is crossed; a fuller management board adds balancing between series cells, temperature sensing and communication about the pack's state. Which level a device needs depends on the pack: a single-cell device can use a compact protection module, while a multi-series pack for a vehicle or a storage system needs balancing and temperature handling as well.
The listed boards cover the common series counts. A PCM for a single 3.6V cell suits small portable devices. A PCM for 3 cells at 11.1V suits three-series packs. A PCM for 4 cells at 14.8V suits four-series packs. A PCM for 6 cells at 21.6V suits six-series packs. Alongside them sits a 4-series BMS for 14.8V Li-ion packs supporting up to 10A discharge current, as listed. Those are the listed boards; the wider range of boards covering other voltages, currents and cell configurations is described on the company category page as available for specific project requirements, and this site does not invent a board for a voltage the company has not listed.
What this page deliberately does not do is promise a specific protection threshold, balancing current or temperature cut-off for any board, because the company category page does not publish those parameters. A buyer who needs a specific threshold should ask for the board's specification sheet for the exact board and the exact pack, and should confirm the answer in writing before samples. General guidance — that protection matters, that balancing matters for series packs, that temperature sensing matters for demanding uses — is not a substitute for a board specification.
A BMS inquiry should therefore contain the pack's chemistry, series count, nominal voltage, maximum discharge current and operating temperature range, plus whether balancing, temperature sensing or communication is required. With those facts, the reply can name a listed board or identify a custom board requirement. Without them, any board recommendation is a guess, and this site does not present guesses as recommendations.
How to choose in this family
Fix the chemistry first, then the voltage and series count, then the capacity. Check the exact model listing for its own dimensions, protection, certificate set, minimum order and lead time — those values belong to that listing and do not transfer to other models. If no listed size fits your enclosure, the custom route covers custom dimensions and configurations; describe the enclosure and the electrical requirements rather than asking for a general price.
Related pages
Custom BMS solution · BMS selection · Pack with built-in PCM · Battery with smart BMS
How to place an inquiry, step by step
- Send the device facts. Tell us the device type, the available space (length, width and maximum thickness), the nominal voltage you need, the capacity or runtime you target, and the peak current if your device has motors, radios or heaters.
- Name the model or the chemistry. If a page on this site matches, quote its model description and listing details. If nothing matches, say so and describe the chemistry and voltage you need, so the conversation starts on the custom route.
- Confirm documents and terms in writing. Ask for the certificate set for that exact model, confirm the minimum order, the price basis and the lead time for that listing, and confirm payment and warranty terms before you pay. Terms stated for one model listing do not transfer to another model.
- Agree the sample step. Confirm whether the next step is a listed sample, an engineering sample for a custom design, or a small trial order, and what test you will run on arrival — fit in the enclosure, runtime, or peak-current behaviour.
Send all of this in one message through the contact page: device type, space, voltage, capacity, peak current, model description if you have one, and the documents you need. That is the whole inquiry — no separate form, no account, no extra step.
What to send us now
Send one message with your device type, the space the pack must fit, the voltage and capacity you need, the peak current if it matters, and the model description if a page on this site already matches. Add the documents you need — certificates are available upon request — and whether you need a listed model or a custom design. Use the contact page or write to [email protected], or call +86-755-25629920. A specific message like that is what turns a range of hundreds of models into a short, answerable question.