JK-QB2A8S-20P 8S 200A Active Balance BMS Full Spec Guide V19.4.1 | EU Compliant
JK-QB2A8S-20P 8S 200A Active Balance BMS Full Spec Guide V19.4.1 | EU Compliant
Publish Date: June 2026 | Brand: JKVOLT JIKONG BMS | EU Certified Model
JK-QB2A8S-20P Full Main Board & Terminal Layout (V19.4.1)
1. Product Overview & EU Compliance Statement
The JK-QB2A8S-20P is 3~8 series lithium active balance BMS developed by JIKONG, supporting ternary, LiFePO4 & LTO lithium battery packs for mobility scooters, small sightseeing vehicles, mini EV and household energy storage. Max 2A active equalization improves cell consistency and extends battery cycle life.
EU Market Compliance Declaration
- CE Certified: Comply with LVD 2014/35/EU & EMC 2014/30/EU safety standards
- RoHS 2.0 (2011/65/EU): Restrict lead, mercury, cadmium and hazardous substances
- EU Battery Regulation (EU) 2023/1542: Meet industrial & light transport lithium battery rules
- GDPR Friendly: Bluetooth APP data collection follows EU data privacy rules, no unauthorized data upload
- Full overcharge, over-discharge, over-temperature & short-circuit protection meets EU electrical safety requirements
Internal Module Structural Block Diagram
2. Model Variants & Optional Configurations
| Model Code | Optional Function | Main Usage |
|---|---|---|
| JK-QB2A8S-20P | Standard (BT, Heating, UART) | General 3~8S battery packs |
| JK-QB2A8S-20PC | Standard + CAN Communication | Solar inverter, EV control system |
| JK-QB2A8S-20PR | Standard + RS485 Communication | Energy storage parallel monitoring |
| JK-QB2A8S-20PCR | Standard + CAN + RS485 Dual Bus | High-end industrial battery systems |
3. Full Standard Technical Parameters
| Item | Specifications | Unit |
|---|---|---|
| Support Cell Strings | 3~8S Li-ion / LiFePO4;7~8S LTO | Strings |
| Max Active Balancing Current | 2 | A |
| Continuous Charge/Discharge Current | 200 | A |
| Max Instantaneous Current | 400 | A |
| Working Voltage Range | 7.5 ~ 40 | V |
| Operating Temperature | -30 ~ +70 | ℃ |
| Board Dimension | 227 * 120 * 21.76 | mm |
| Net Weight | 662 | g |
4. Full Interface Definition & Wiring Ports
Complete Connector & Pin Definition Schematic
Standard onboard interfaces: Balance sampling port, 4-channel NTC temperature port, UART GPS port, display screen port, heating terminal, alarm fan port, CAN / RS485 communication dual bus, force charge/discharge trigger switch.
5. Installation & Wiring Guide
Step-by-Step Installation Wiring Layout
EU Market Safety Installation Tips
- Install temperature-controlled thermal cut-off switch (45~65℃) on heating circuit to avoid thermal runaway (EU safety mandatory)
- Use certified copper wiring with enough current rating for 200A continuous load
- Do not short B+ / B- terminals during assembly, comply with EU low voltage safety rules
- Store and operate within -30~70℃ temperature range to maintain CE compliance
6. Core Standard Functions (EU Safety Protection)
Balancing & Monitoring
- 2A high current active energy transfer balance
- ±3mV high precision cell voltage sampling
- IOS & Android Bluetooth APP control
- Real SOC & time log recording
Full EU Safety Protection
- Charge overvoltage / discharge undervoltage auto recovery
- Over current, over temperature & instant short circuit protection
- Low temperature charging lock + heating control
- 30-minute emergency bypass switch
Communication Ports
- Dual optional CAN / RS485 bus for inverters
- UART port for external GPS positioning
- External LCD display screen interface
- Multi-unit parallel monitoring support
Auxiliary EU Certified Features
- 20A low-temperature heating circuit
- Force discharge & force heating function
- 5s adjustable discharge pre-charge
- Intelligent low-power sleep mode
7. FAQ for EU Buyers
Q1: Is this BMS legal to sell within EU countries?
Yes, fully CE, RoHS compliant, meets EU battery regulation for mobility scooters, solar storage battery packs.
Q2: Can it connect European brand solar inverters?
Optional CAN / RS485 version supports most mainstream EU inverter communication protocols, adjustable inside JKBMS APP.
Q3: Does Bluetooth data comply with GDPR?
The APP only reads local battery data, no automatic cloud upload, fully compliant with EU data privacy rules.
Shop All 3~8S BMS Series
View the full lineup of JK QB series lithium battery management systems for small EV & household energy storage: 8S-16S BMS Collection Page
All models pass CE & RoHS certification for European market sales.