Manufacturer and seller images. Configuration examples may include additional equipment.
Image source: JK-QB2A8S20P board, top view, from Jikong's own store page for this modelNo sellers found.
Printed as "JK-QB2A8S20P" in the title of Jikong's own store page; Jikong's specification prints the same model as "JK-QB2A8S-20P".
Official product page: Jikong Technology Official Store: JKBMS JK-QB2A8S20P Parking Start Dedicated BMS Checked · Earlier documentLocation: Product title
Documented
Converted: 620 g / 1000 g per kg = 0.62 kg
Printed as "成品重量 (Finished weight) 620 g" in the basic parameter table.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Basic parameter table, PDF page 17
Converted
The specification's adaptation guide prints 3-8 strings (7-8 for LTO), while the store page prints "Series 4-8S". The specification's range is recorded first.
Printed in the product adaptation guide as 3-8 strings for ternary lithium and lithium iron batteries and 7-8 for lithium titanate batteries.
Printed as "Series 4-8S" in the store page's additional information table.
Official product page: Jikong Technology Official Store: JKBMS JK-QB2A8S20P Parking Start Dedicated BMS Checked · Earlier documentLocation: Product adaptation guide, section 2.2, PDF page 9
Documented
Printed as "保护板尺寸 (Protective plate size) 227*120*21.12 mm" in the basic parameter table and as 227mm×120mm×21.12mm in section 5.2; the figures are not labeled by axis, so they are stored in the order printed.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Basic parameter table, PDF page 17; section 5.2, PDF page 24
Calculated
Printed in the function configuration table as "蓝牙功能 (Bluetooth function) 标配 (Standard option)", "GPS接口 (GPS interface) 标配", "RS485 选配 (Optional)", "CAN 选配 (Optional)" and "显示屏接口 (Display interface) 标配".
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Product function configuration table, section 2.1, PDF page 8
Documented
Printed as "The protection board is equipped with heating function as standard" and "The designed heating current is 20A."; a forced heating switch is added for low-temperature charging.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Section 3.3, Heating function
Documented
Printed on the cover as "Lithium battery active balancing protection board".
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Cover
Documented
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".
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-QB2A8S20P Parking Start Dedicated BMS Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Documented
Printed as "最大充电电流 (Maximum charging current) 200 A" in the basic parameter table; section 3.17 adds a charge current limiting function that holds the charging current at about 10A after a charge overcurrent.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Documented
Converted: 620 g / 1000 g per kg = 0.62 kg
Printed as "成品重量 (Finished weight) 620 g" in the basic parameter table.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Basic parameter table, PDF page 17
Converted
The specification's adaptation guide prints 3-8 strings (7-8 for LTO), while the store page prints "Series 4-8S". The specification's range is recorded first.
Printed in the product adaptation guide as 3-8 strings for ternary lithium and lithium iron batteries and 7-8 for lithium titanate batteries.
Printed as "Series 4-8S" in the store page's additional information table.
Official product page: Jikong Technology Official Store: JKBMS JK-QB2A8S20P Parking Start Dedicated BMS Checked · Earlier documentLocation: Product adaptation guide, section 2.2, PDF page 9
Documented
Printed as "保护板尺寸 (Protective plate size) 227*120*21.12 mm" in the basic parameter table and as 227mm×120mm×21.12mm in section 5.2; the figures are not labeled by axis, so they are stored in the order printed.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Basic parameter table, PDF page 17; section 5.2, PDF page 24
Documented
Printed in the function configuration table as "蓝牙功能 (Bluetooth function) 标配 (Standard option)", "GPS接口 (GPS interface) 标配", "RS485 选配 (Optional)", "CAN 选配 (Optional)" and "显示屏接口 (Display interface) 标配".
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Product function configuration table, section 2.1, PDF page 8
Documented
Printed as "The protection board is equipped with heating function as standard" and "The designed heating current is 20A."; a forced heating switch is added for low-temperature charging.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Section 3.3, Heating function
Documented
Printed on the cover as "Lithium battery active balancing protection board".
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Cover
Documented
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".
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-QB2A8S20P Parking Start Dedicated BMS Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Documented
Printed as "最大充电电流 (Maximum charging current) 200 A" in the basic parameter table; section 3.17 adds a charge current limiting function that holds the charging current at about 10A after a charge overcurrent.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Documented
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)".
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentLocation: Product adaptation guide, section 2.2, PDF page 9
Documented
Printed as "最大放电电流 (Maximum discharge current) 200 A" in the basic parameter table; the store page prints "Continuous Discharge 200A". No duration is printed.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-QB2A8S20P Parking Start Dedicated BMS Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Documented
Published claims and calculations, not independent test results.
Archived copy captured on 2026-10-13.
Location: Sections 2.1 to 2.3, 4.1 and 5.2 (PDF pages 8, 9, 17 and 24)
Retrieved
Jikong Technology's own product specification for the JK-QB2A8S-20P vehicle-starting BMS and its function options, downloaded from the Specifications list of jkbms.com's support page on October 13, 2026. Bilingual Chinese and English.
Archived copy of a document published by Chengdu Jikong Technology Co., Ltd. (JK BMS). Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Archived copy, unaltered, kept as a record of what Chengdu Jikong Technology Co., Ltd. (JK BMS) published. Original address: https://www.jkbms.com/wp-content/uploads/2026/02/JK-QB2A8S-20P-Product-specification.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: eeaedb514d8c495ce360e1149626869dcbdd7a34a8e0efbccd408a539346eea1
Archived copy captured on 2026-10-13.
Location: Product title, product description and additional information table
Retrieved
Jikong Technology's own product page for this model on its official store (shop.jkbms.com), captured October 13, 2026. A product page with marketing text and a short additional-information table, not a datasheet; customer reviews on the page are not used.
Earlier revisions, archived captures and copies published by someone other than the manufacturer. Every one stays reachable.
Archived copy of a document published by Chengdu Jikong Technology Co., Ltd. (JK BMS). Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Archived copy, unaltered, kept as a record of what Chengdu Jikong Technology Co., Ltd. (JK BMS) published. Original address: https://www.jkbms.com/wp-content/uploads/2026/02/JK-QB2A8S-20P-Product-specification.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: eeaedb514d8c495ce360e1149626869dcbdd7a34a8e0efbccd408a539346eea1
No warranty terms on file.
No sellers found.
No seller price history.
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No certificates on file. Certificate guide
No sourced accessories or replacement parts listed yet.
Hyphenated form Jikong prints in its specification (section 2.3, PDF page 9) for this model.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (section 2.3, PDF page 9): the standard board with CAN communication added ("标配+CAN通信"). One basic parameter table covers every option; not a separate product.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (section 2.3, PDF page 9): the standard board with RS485 communication added ("标配+RS485通信"). One basic parameter table covers every option; not a separate product.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (section 2.3, PDF page 9): the standard board with CAN and RS485 communication added. One basic parameter table covers every option; not a separate product.
Official datasheet: JK-QB2A8S-20P Product specification, Version 19.2.1 Rev 19.2.1 · Checked · Earlier documentManufacturer SKU JK-QB2A8S20P
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