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JK BMS B1A8S-10PS active balance BMS

Model: JK-B1A8S-10PS · SKU: JK-B1A8S-10PS

Prepared Nov 12, 2026

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Common specifications

Series cells	3-8S (LiFePO4 and ternary lithium/Li-ion), 7-8S (LTO)Source [1]
Battery chemistry	Ternary lithium (Li-ion), LiFePO4, LTOSource [1]
Continuous discharge current	100 ASource [1]
Continuous charge current	100 ASource [1]
Balance current	1 ASource [1]
Communications	Bluetooth, UART and display interface (standard); CAN and RS485 optionalSource [1]
Peak discharge current	Not documented
Balancing	Active balancingSource [1]
Heating output	Heating function optional, designed heating current 4A (not a stated wattage)Source [1]
Weight	0.41 kg0.91 lb convertedCalculatedSource [1]
Dimensions	153.9 D × 107 D × 17.6 D mm6.06 D × 4.21 D × 0.69 D in convertedSource [1]
Enclosure volume	0.29 L** Calculated from recorded external dimensions
Warranty term	Not documented

All recorded specifications

Balance current	1 ADocumented claim Conditions Printed as "主动均衡电流 (Active equalizing current) 1A" in the function configuration table and "最大均衡电流 (Maximum balancing current) 1 A" in the basic parameter table. Location: Product function configuration table, section 2.1, PDF page 8; basic parameter table, section 4.1, PDF page 16 Printed as "主动均衡电流 (Active equalizing current) 1A" in the function configuration table and "最大均衡电流 (Maximum balancing current) 1 A" in the basic parameter table. Location: Product function configuration table, section 2.1, PDF page 8; basic parameter table, section 4.1, PDF page 16 Official datasheet · JK-B1A8S-10PS Product specification, Version 15.3.3 [1]
Balancing	Active balancingDocumented claim Conditions Printed on the cover as "Lithium battery active balancing protection board". Location: Cover Printed on the cover as "Lithium battery active balancing protection board". Location: Cover Official datasheet · JK-B1A8S-10PS Product specification, Version 15.3.3 [1]
Battery chemistry	Ternary lithium (Li-ion), LiFePO4, LTODocumented claim Conditions Printed in the adaptation guide as "三元锂电池 (Ternary lithium battery)", "铁锂电池 (Lithium iron battery)" and "钛酸锂电池 (Lithium titanate battery)". Location: Product adaptation guide, section 2.2, PDF page 9 Printed in the adaptation guide as "三元锂电池 (Ternary lithium battery)", "铁锂电池 (Lithium iron battery)" and "钛酸锂电池 (Lithium titanate battery)". Location: Product adaptation guide, section 2.2, PDF page 9 Official datasheet · JK-B1A8S-10PS Product specification, Version 15.3.3 [1]
Communications	Bluetooth, UART and display interface (standard); CAN and RS485 optionalDocumented claim Conditions Printed in the function configuration table as "蓝牙功能 (Bluetooth function) 标配 (Standard option)", "UART接口 (UART interface) 标配", "RS485 选配 (Optional)", "CAN 选配 (Optional)" and "显示屏接口 (Display interface) 标配". The function selection guide (section 2.3) gives the CAN, RS485 and heating options their own model codes. Location: Product function configuration table, section 2.1, PDF page 8 Printed in the function configuration table as "蓝牙功能 (Bluetooth function) 标配 (Standard option)", "UART接口 (UART interface) 标配", "RS485 选配 (Optional)", "CAN 选配 (Optional)" and "显示屏接口 (Display interface) 标配". The function selection guide (section 2.3) gives the CAN, RS485 and heating options their own model codes. Location: Product function configuration table, section 2.1, PDF page 8 Official datasheet · JK-B1A8S-10PS Product specification, Version 15.3.3 [1]
Continuous charge current	100 ADocumented claim Conditions Printed as "最大充电电流 (Maximum charging current) 100 A" in the basic parameter table; no duration is printed. Location: Basic parameter table, section 4.1, PDF page 16 Printed as "最大充电电流 (Maximum charging current) 100 A" in the basic parameter table; no duration is printed. Location: Basic parameter table, section 4.1, PDF page 16 Official datasheet · JK-B1A8S-10PS Product specification, Version 15.3.3 [1]
Continuous discharge current	100 ADocumented claim Conditions Printed as "最大放电电流 (Maximum discharge current) 100 A" in the basic parameter table; the discharge overcurrent section notes "The maximum continuous discharge current can not exceed the design value of 100A". Location: Basic parameter table, section 4.1, PDF page 16; section 3.9, PDF page 13 Printed as "最大放电电流 (Maximum discharge current) 100 A" in the basic parameter table; the discharge overcurrent section notes "The maximum continuous discharge current can not exceed the design value of 100A". Location: Basic parameter table, section 4.1, PDF page 16; section 3.9, PDF page 13 Official datasheet · JK-B1A8S-10PS Product specification, Version 15.3.3 [1]
Dimensions	153.9 D × 107 D × 17.6 D mm6.06 D × 4.21 D × 0.69 D in convertedDocumented claim Conditions Printed as "保护板尺寸 (Protective plate size) 153.910717.6 mm" in the basic parameter table and as 153.9mm×107mm×17.6mm in section 5.3; the figures are not labeled by axis, so they are stored in the order printed. Location: Basic parameter table, section 4.1, PDF page 16; section 5.3, PDF page 23 Printed as "保护板尺寸 (Protective plate size) 153.910717.6 mm" in the basic parameter table and as 153.9mm×107mm×17.6mm in section 5.3; the figures are not labeled by axis, so they are stored in the order printed. Location: Basic parameter table, section 4.1, PDF page 16; section 5.3, PDF page 23 Official datasheet · JK-B1A8S-10PS Product specification, Version 15.3.3 [1]
Heating output	Heating function optional, designed heating current 4A (not a stated wattage)Documented claim Conditions Printed as "加热功能 (Heating function) 选配 (Optional)" in the function configuration table and "The designed heating current is 4A" in section 3.3; the heating options carry their own model codes in section 2.3. Location: Product function configuration table, section 2.1, PDF page 8; section 3.3, Heating function, PDF page 11 Printed as "加热功能 (Heating function) 选配 (Optional)" in the function configuration table and "The designed heating current is 4A" in section 3.3; the heating options carry their own model codes in section 2.3. Location: Product function configuration table, section 2.1, PDF page 8; section 3.3, Heating function, PDF page 11 Official datasheet · JK-B1A8S-10PS Product specification, Version 15.3.3 [1]
Operating temperature	-30 to 70 °C-22 to 158 °F convertedDocumented claim Conditions Printed as "工作温度 (Operating temperature) -30-70 ℃" in the basic parameter table. Location: Basic parameter table, section 4.1, PDF page 16 Printed as "工作温度 (Operating temperature) -30-70 ℃" in the basic parameter table. Location: Basic parameter table, section 4.1, PDF page 16 Official datasheet · JK-B1A8S-10PS Product specification, Version 15.3.3 [1]
Series cells	3-8S (LiFePO4 and ternary lithium/Li-ion), 7-8S (LTO)Documented claim Conditions Printed in the product adaptation guide for this model as 3～8 strings for ternary lithium and for lithium iron (LiFePO4) batteries and 7～8 for lithium titanate (LTO) batteries; the basic parameter table prints a maximum of 8 collection strings. Location: Product adaptation guide, section 2.2, PDF page 9 Printed in the product adaptation guide for this model as 3～8 strings for ternary lithium and for lithium iron (LiFePO4) batteries and 7～8 for lithium titanate (LTO) batteries; the basic parameter table prints a maximum of 8 collection strings. Location: Product adaptation guide, section 2.2, PDF page 9 Official datasheet · JK-B1A8S-10PS Product specification, Version 15.3.3 [1]
Weight	0.41 kg0.91 lb convertedCalculated411 g / 1000 g per kg = 0.411 kg Conditions Printed as "成品重量 (Finished weight) 411 g" in the basic parameter table. Location: Basic parameter table, section 4.1, PDF page 16 Printed as "成品重量 (Finished weight) 411 g" in the basic parameter table. Location: Basic parameter table, section 4.1, PDF page 16 Official datasheet · JK-B1A8S-10PS Product specification, Version 15.3.3 [1]

Warranty

Certificate records

No records documented.

Sources and revisions

JK-B1A8S-10PS Product specification, Version 15.3.3Official datasheet · Revision 15.3.3 · Checked Oct 29, 2026https://www.jkbms.com/wp-content/uploads/2026/10/JK-B1A8S-10PS-User-Manual-V15.3.3.pdf