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JK BMS B2A32SRP relay version active balance BMS

Model: JK-B2A32SRP · SKU: JK-B2A32SRP

Prepared Nov 13, 2026

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Common specifications

Series cells	8-32S (LiFePO4), 7-32S (ternary lithium), 14-32S (LTO)Source [1, 2]
Battery chemistry	Ternary lithium (Li-ion), LiFePO4, LTOSource [1]
Continuous discharge current	300 ASource [1, 2]
Continuous charge current	300 ASource [1]
Balance current	2 ASource [1, 2]
Communications	Bluetooth, UART, RS485, CAN and display interface (all standard)Source [1, 2]
Peak discharge current	Not documented
Balancing	Active balancingSource [1]
Heating output	Heating function standard, designed heating current 10A (not a stated wattage)Source [1]
Weight	1.28 kg2.82 lb convertedCalculatedSource [1]
Dimensions	234.6 D × 157.5 D × 30.5 D mm9.24 D × 6.2 D × 1.2 D in convertedSource [1]
Enclosure volume	1.13 L** Calculated from recorded external dimensions
Warranty term	Not documented

All recorded specifications

Balance current	2 ADocumented claim Conditions Printed as "最大均衡电流 (Maximum balancing current) 2 A" in the basic parameter table; the store page prints "Balance Current 2A". Location: Basic parameter table, section 4.1, PDF page 20 Printed as "最大均衡电流 (Maximum balancing current) 2 A" in the basic parameter table; the store page prints "Balance Current 2A". Location: Basic parameter table, section 4.1, PDF page 20 Official datasheet · JK-B2A32S-RP Product specification, Version 20.1.1 Official product page · Jikong Technology Official Store: JK BMS B2A32SRP \| 300A Continuous Discharge \| 2A Active Balancer \| 8S-32S LiFePO4/Li-ion/LTO Smart BMS (October 21, 2026 capture) [1, 2]
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-B2A32S-RP Product specification, Version 20.1.1 [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-B2A32S-RP Product specification, Version 20.1.1 [1]
Communications	Bluetooth, UART, RS485, CAN and display interface (all standard)Documented claim Conditions Printed in the function configuration table as "蓝牙功能 (Bluetooth function)", "UART接口 (UART interface)", "RS485", "CAN" and "显示屏接口 (Display interface)", each "标配 (Standard option)"; the store page prints "Communication ACC, Bluetooth, CAN, Display, Heating Function, RS485, UART". Location: Product function configuration table, section 2.1, PDF page 8; store page additional information table Printed in the function configuration table as "蓝牙功能 (Bluetooth function)", "UART接口 (UART interface)", "RS485", "CAN" and "显示屏接口 (Display interface)", each "标配 (Standard option)"; the store page prints "Communication ACC, Bluetooth, CAN, Display, Heating Function, RS485, UART". Location: Product function configuration table, section 2.1, PDF page 8; store page additional information table Official datasheet · JK-B2A32S-RP Product specification, Version 20.1.1 Official product page · Jikong Technology Official Store: JK BMS B2A32SRP \| 300A Continuous Discharge \| 2A Active Balancer \| 8S-32S LiFePO4/Li-ion/LTO Smart BMS (October 21, 2026 capture) [1, 2]
Continuous charge current	300 ADocumented claim Conditions Printed as "最大充电电流 (Maximum charging current) 300 A" in the basic parameter table, with the note "Replacing the shunt resistor allows for a higher charging current." Location: Basic parameter table, section 4.1, PDF page 20 Printed as "最大充电电流 (Maximum charging current) 300 A" in the basic parameter table, with the note "Replacing the shunt resistor allows for a higher charging current." Location: Basic parameter table, section 4.1, PDF page 20 Official datasheet · JK-B2A32S-RP Product specification, Version 20.1.1 [1]
Continuous discharge current	300 ADocumented claim Conditions Printed as "最大放电电流 (Maximum discharge current) 300 A" in the basic parameter table, with the note "Replacing the shunt resistor allows for a higher discharging current."; the store page prints "Continuous Discharge 300A". No duration is printed. Location: Basic parameter table, section 4.1, PDF page 20 Printed as "最大放电电流 (Maximum discharge current) 300 A" in the basic parameter table, with the note "Replacing the shunt resistor allows for a higher discharging current."; the store page prints "Continuous Discharge 300A". No duration is printed. Location: Basic parameter table, section 4.1, PDF page 20 Official datasheet · JK-B2A32S-RP Product specification, Version 20.1.1 Official product page · Jikong Technology Official Store: JK BMS B2A32SRP \| 300A Continuous Discharge \| 2A Active Balancer \| 8S-32S LiFePO4/Li-ion/LTO Smart BMS (October 21, 2026 capture) [1, 2]
Dimensions	234.6 D × 157.5 D × 30.5 D mm9.24 D × 6.2 D × 1.2 D in convertedDocumented claim Conditions Printed as "保护板尺寸 (Protective plate size) 234.6157.530.5 mm" in the basic parameter table and as 234.6mm×157.5mm×30.5mm in section 5.3; the figures are not labeled by axis, so they are stored in the order printed. Location: Basic parameter table, PDF page 20; section 5.3, PDF page 29 Printed as "保护板尺寸 (Protective plate size) 234.6157.530.5 mm" in the basic parameter table and as 234.6mm×157.5mm×30.5mm in section 5.3; the figures are not labeled by axis, so they are stored in the order printed. Location: Basic parameter table, PDF page 20; section 5.3, PDF page 29 Official datasheet · JK-B2A32S-RP Product specification, Version 20.1.1 [1]
Heating output	Heating function standard, designed heating current 10A (not a stated wattage)Documented claim Conditions Printed as "加热功能 (Heating function) 标配 (Standard option)" in the function configuration table and "The designed heating current is 10A." in section 3.4, which recommends heating wire of no less than 16 AWG. Location: Product function configuration table, section 2.1; section 3.4, Heating function Printed as "加热功能 (Heating function) 标配 (Standard option)" in the function configuration table and "The designed heating current is 10A." in section 3.4, which recommends heating wire of no less than 16 AWG. Location: Product function configuration table, section 2.1; section 3.4, Heating function Official datasheet · JK-B2A32S-RP Product specification, Version 20.1.1 [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 20 Printed as "工作温度 (Operating temperature) -30-70 ℃" in the basic parameter table. Location: Basic parameter table, section 4.1, PDF page 20 Official datasheet · JK-B2A32S-RP Product specification, Version 20.1.1 [1]
Series cells	8-32S (LiFePO4), 7-32S (ternary lithium), 14-32S (LTO)Documented claim Conditions Printed in the specification's adaptation guide as 7～32 strings for ternary lithium, 8～32 for lithium iron and 14～32 for lithium titanate batteries; the store page prints "Series 8-32S". Location: Product adaptation guide, section 2.2, PDF page 9; store page additional information table Printed in the specification's adaptation guide as 7～32 strings for ternary lithium, 8～32 for lithium iron and 14～32 for lithium titanate batteries; the store page prints "Series 8-32S". Location: Product adaptation guide, section 2.2, PDF page 9; store page additional information table Official datasheet · JK-B2A32S-RP Product specification, Version 20.1.1 Official product page · Jikong Technology Official Store: JK BMS B2A32SRP \| 300A Continuous Discharge \| 2A Active Balancer \| 8S-32S LiFePO4/Li-ion/LTO Smart BMS (October 21, 2026 capture) [1, 2]
Weight	1.28 kg2.82 lb convertedCalculated1280 g / 1000 g per kg = 1.28 kg Conditions Printed as "成品重量 (Finished weight) 1280 g" in the basic parameter table. Location: Basic parameter table, section 4.1, PDF page 20 Printed as "成品重量 (Finished weight) 1280 g" in the basic parameter table. Location: Basic parameter table, section 4.1, PDF page 20 Official datasheet · JK-B2A32S-RP Product specification, Version 20.1.1 [1]

Warranty

Certificate records

No records documented.

Sources and revisions

JK-B2A32S-RP Product specification, Version 20.1.1Official datasheet · Revision 20.1.1 · Checked Oct 21, 2026https://www.jkbms.com/wp-content/uploads/2026/03/JK-B2A32S-RP-Product-specification-V20.1.1.pdf
Jikong Technology Official Store: JK BMS B2A32SRP | 300A Continuous Discharge | 2A Active Balancer | 8S-32S LiFePO4/Li-ion/LTO Smart BMS (October 21, 2026 capture)Official product page · Checked Oct 21, 2026https://www.shop.jkbms.com/product/jk-bms-b2a32srp-2a-active-balancer/