If you build or maintain an electric skateboard, Onewheel, e-bike, or scooter, choosing the right lithium battery protection board is essential for managing charging risks. High-series lithium-ion battery packs require careful voltage monitoring during charging, while limited installation space can make board size and wiring important considerations. A board designed only for charging can also help simplify a dedicated charging circuit, provided you understand its limitations.
The Maxkgo MKBMS 4S-24S 20A Only Charge BMS Board supports lithium-ion battery packs from 4S to 24S and provides a charging current of up to 20A. It combines passive cell balancing, LED balance indication, overcharge protection, and overtemperature protection. However, it does not provide discharge protection, so you must use an appropriate separate solution for discharge-side safety.
What Makes This Lithium Battery Protection Board Suitable for Charging?
A charging-only BMS serves a specific purpose: it helps manage battery charging without functioning as a complete charge-and-discharge protection system. This design suits applications where charging and discharging use separate electrical paths.
The Maxkgo 4S-24S charging BMS offers several practical features:
- Wide series compatibility: Supports lithium-ion battery configurations from 4S through 24S, subject to correct wiring and battery compatibility.
- 20A charging current: Provides a rated charging-current specification of 20A. Your charger, cells, wiring, connectors, and thermal conditions must also support the selected current.
- Passive cell balancing: Helps reduce voltage differences between cells during balancing operation.
- LED balance indication: Provides a visual indication of balancing activity.
- Overcharge protection: Helps reduce charging-related overvoltage risks.
- Overtemperature protection: Provides a specified temperature-related protection function during charging.
These features make the board worth considering for DIY electric mobility projects that need a dedicated lithium battery charging protection board.
24S BMS Compatibility and Key Specifications
When selecting a 24S BMS, check more than the series count. You also need to confirm the battery chemistry, charging voltage, current requirements, connector arrangement, and protection functions.
| Specification | Maxkgo MKBMS 4S-24S |
|---|---|
| BMS type | Only Charge BMS |
| Battery configuration | 4S–24S |
| Rated charging current | 20A |
| Balancing method | Passive balancing |
| Balance indication | LED indicators |
| Charging protections | Overcharge and overtemperature protection |
| Connector options | XT30 / XT60, as applicable to the selected version |
| Typical applications | Onewheels, electric skateboards, scooters, e-bikes, and EUCs |
| Discharge protection | Not supported |
A fully charged 24S lithium-ion pack can exceed 100V DC, depending on cell chemistry and charging voltage. Therefore, verify the board’s voltage limits and the battery manufacturer’s specifications before installation.
Charging-Only BMS vs. Full-Function BMS
| Feature | Only Charge BMS | Full-Function BMS |
|---|---|---|
| Charging management | Yes, according to specified functions | Depends on model |
| Passive balancing | Supported on this model | Model-dependent |
| LED balance indication | Supported on this model | Model-dependent |
| Discharge protection | Not supported | Available on suitable models |
| Best fit | Dedicated charging circuits | Systems requiring integrated charge and discharge management |
Choose the charging-only option when your system design already addresses discharge-side protection. If you need one board to manage both charging and discharging, select a suitable full-function BMS instead.
How to Install a 24S Lithium Battery Charging BMS
Correct wiring is essential when working with a high-voltage battery pack. Follow the product-specific wiring diagram rather than relying on wire colors or connector appearance.
- Verify the battery configuration. Confirm that the pack contains the correct number of series-connected cells and that its chemistry matches the BMS specifications.
- Check voltage compatibility. Compare the pack’s maximum charging voltage with the board’s permitted operating range and your charger’s output.
- Connect the balance leads in sequence. Follow the manufacturer’s terminal diagram, checking each connection from the lowest-potential reference point upward. Do not assume a particular B0–B24 arrangement without confirming the version-specific documentation.
- Inspect connectors and wiring. Verify polarity, connector ratings, wire sizing, insulation, and secure connections before applying power.
- Test under controlled conditions. Use suitable measuring equipment and a compatible current-limited charging setup. Stop immediately if you detect abnormal heating, unexpected voltage readings, or damaged wiring.
Because a 24S pack can exceed 100V DC, installation should be performed by someone qualified to work with high-voltage battery systems. Never discharge the battery through this charging-only board.
Why Choose Maxkgo for BMS Solutions?
Maxkgo originated from the FLIPSKY team in 2017 and established the MAXKGO brand in 2021, drawing on experience in DIY electric skateboarding and electronic speed controller development. The company focuses on battery management systems and drone ESCs for electric mobility, robotics, and intelligent power applications.
Its product range includes Only Charge BMS, Hardware BMS, Smart BMS, Smart Master Slave BMS, and BMS accessories. This gives buyers options to evaluate against different battery architectures and system requirements.
Maxkgo also describes its manufacturing process as covering assembly through final inspection. When evaluating a supplier for a production project, ask for the applicable product test reports, quality documentation, and certificates relevant to your specific model. Do not assume that a certificate or protection function applies to every product in the range.
FAQ
1. What battery packs can this 24S BMS support?
The board is specified for 4S–24S lithium-ion battery packs. Before purchasing, confirm the exact series configuration, chemistry, voltage limits, and wiring requirements with Maxkgo.
2. Does this lithium battery protection board protect against discharge overcurrent?
No. This model is designed for charging protection and does not support discharge protection. You need a suitable separate protection arrangement for discharge overcurrent, undervoltage, and other system-level risks.
3. Can I use this 20A charging BMS with an electric skateboard or Onewheel?
It is intended for applications including electric skateboards and Onewheels. Confirm that your battery configuration, charging current, connectors, and charger are compatible. Also ensure that the complete system has appropriate discharge protection.
Conclusion
The Maxkgo MKBMS 4S-24S 20A Only Charge BMS Board is a charging-focused option for compatible lithium-ion battery packs used in electric skateboards, Onewheels, e-bikes, scooters, and EUCs. Its 4S–24S compatibility, 20A charging rating, passive balancing, LED indication, and charging protection functions make it suitable for designs that use a separate discharge protection arrangement. Before selecting a lithium battery protection board, verify the electrical specifications, wiring diagram, and safety requirements for your battery pack.
CTA
Contact Maxkgo to confirm compatibility with your battery configuration, request the wiring diagram and applicable technical documentation, and check whether the XT30 or XT60 version meets your charging-system requirements before placing an order.
