Manufacturer and seller images. Configuration examples may include additional equipment.
Image source: JK-BD4A17S4P board with its type label, from Jikong's own store page for this modelNo sellers found.
Printed as "JK-BD4A17S4P" in the title of Jikong's own store page; Jikong's specification prints the same model as "JK-BD4A17S-4P". The Amazon listing was only a lead.
Official product page: Jikong Technology Official Store: JKBMS JK-BD4A17S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Product title
Documented
Converted: 205 g / 1000 g per kg = 0.205 kg
Printed as "成品重量 (Finished weight) 205 g" in the basic parameter table. The table covers the series.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 18
Converted
Printed in the specification's adaptation guide for the JK-BD4A17S-4P as 7～17 strings for ternary lithium, 8～17 for lithium iron and 14～17 for lithium titanate batteries; the store page prints "Series 8-17S".
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-BD4A17S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Product adaptation guide, section 2.2, PDF page 9, JK-BD4A17S-4P row; store page additional information table
Documented
Printed as "保护板尺寸 (Protective plate size) 116*103*17.6 mm" in the basic parameter table and as 116mm×103mm×17.6mm in section 5.3; the figures are not labeled by axis, so they are stored in the order printed. Section 5.3 gives this as the size of the JK-BD4A24S-4P series board.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentLocation: Basic parameter table, PDF page 18; section 5.3, PDF page 25
Calculated
Printed in the function configuration table as "蓝牙功能 (Bluetooth function) 标配 (Standard option)", "UART接口 (UART interface) 标配", "CAN 选配 (Optional)", "RS485 选配 (Optional)" and "显示屏接口 (Display interface) 标配". The store page prints "Communication Bluetooth, RS485".
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-BD4A17S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Product function configuration table, section 2.1, PDF page 8; store page additional information table
Documented
Printed as "加热功能 (Heating function) 选配 (Optional)" in the function configuration table and "designed heating current is 10A" in section 3.3.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentLocation: Product function configuration table, section 2.1; section 3.3, Heating function
Documented
Printed on the cover of the series specification as "Lithium battery active balancing protection board".
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentLocation: Cover
Documented
Printed as "最大均衡电流 (Maximum balancing current) 0.4 A" in the series' basic parameter table; the store page prints "Balance Current 0.4A".
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-BD4A17S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 18
Documented
Printed as "最大充电电流 (Maximum charging current) 40 A" in the series' basic parameter table.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 18
Documented
Converted: 205 g / 1000 g per kg = 0.205 kg
Printed as "成品重量 (Finished weight) 205 g" in the basic parameter table. The table covers the series.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 18
Converted
Printed in the specification's adaptation guide for the JK-BD4A17S-4P as 7～17 strings for ternary lithium, 8～17 for lithium iron and 14～17 for lithium titanate batteries; the store page prints "Series 8-17S".
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-BD4A17S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Product adaptation guide, section 2.2, PDF page 9, JK-BD4A17S-4P row; store page additional information table
Documented
Printed as "保护板尺寸 (Protective plate size) 116*103*17.6 mm" in the basic parameter table and as 116mm×103mm×17.6mm in section 5.3; the figures are not labeled by axis, so they are stored in the order printed. Section 5.3 gives this as the size of the JK-BD4A24S-4P series board.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentLocation: Basic parameter table, PDF page 18; section 5.3, PDF page 25
Documented
Printed in the function configuration table as "蓝牙功能 (Bluetooth function) 标配 (Standard option)", "UART接口 (UART interface) 标配", "CAN 选配 (Optional)", "RS485 选配 (Optional)" and "显示屏接口 (Display interface) 标配". The store page prints "Communication Bluetooth, RS485".
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-BD4A17S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Product function configuration table, section 2.1, PDF page 8; store page additional information table
Documented
Printed as "加热功能 (Heating function) 选配 (Optional)" in the function configuration table and "designed heating current is 10A" in section 3.3.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentLocation: Product function configuration table, section 2.1; section 3.3, Heating function
Documented
Printed on the cover of the series specification as "Lithium battery active balancing protection board".
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentLocation: Cover
Documented
Printed as "最大均衡电流 (Maximum balancing current) 0.4 A" in the series' basic parameter table; the store page prints "Balance Current 0.4A".
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-BD4A17S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 18
Documented
Printed as "最大充电电流 (Maximum charging current) 40 A" in the series' basic parameter table.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 18
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)" for the JK-BD4A17S-4P.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentLocation: Product adaptation guide, section 2.2, PDF page 9, JK-BD4A17S-4P row
Documented
Printed as "最大放电电流 (Maximum discharge current) 40 A" in the series' basic parameter table; the store page prints "Continuous Discharge 40A". No duration is printed.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-BD4A17S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 18
Documented
Printed as "工作温度 (Operating temperature) -30-70 ℃" in the basic parameter table.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 18
Documented
Published claims and calculations, not independent test results.
Archived copy captured on 2026-10-21.
Location: Sections 2.1 to 2.3, 3.3, 4.1 and 5.3 (PDF pages 8 to 11, 18 and 25)
Retrieved
Jikong Technology's own bilingual (Chinese and English) specification for its JK-BD4A24S-4P series of 40 A boards, version 19.0.1, downloaded from the Specifications list of jkbms.com's support page; captured October 21, 2026. Its adaptation and function selection guides list the JK-BD4A24S-4P, JK-BD4A20S-4P and JK-BD4A17S-4P; one basic parameter table and one size cover the series. Manufacturer claims, not independent tests.
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-BD4A24S-4P-Product-specification.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 1520f63b4d3681ee05a2940d86a98d20f44540992904d8b3747100be829ea1ac
Archived copy captured on 2026-10-21.
Location: Product title, technical specifications list and additional information table
Retrieved
Jikong Technology's own product page for this model on its official store (shop.jkbms.com), captured October 21, 2026. A product page with marketing text, a short technical list and an 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-BD4A24S-4P-Product-specification.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 1520f63b4d3681ee05a2940d86a98d20f44540992904d8b3747100be829ea1ac
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Hyphenated form Jikong prints in its specification (sections 2.2 and 2.3, PDF pages 9 and 11) for this model.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (sections 2.2 and 2.3, PDF pages 9 and 11): 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-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (sections 2.2 and 2.3, PDF pages 9 and 11): 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-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (sections 2.2 and 2.3, PDF pages 9 and 11): the standard board with heating added ("标配+加热"). One basic parameter table covers every option; not a separate product.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (sections 2.2 and 2.3, PDF pages 9 and 11): the standard board with heating and CAN communication added. One basic parameter table covers every option; not a separate product.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (sections 2.2 and 2.3, PDF pages 9 and 11): the standard board with heating and RS485 communication added. One basic parameter table covers every option; not a separate product.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (sections 2.2 and 2.3, PDF pages 9 and 11): the standard board with heating, CAN and RS485 communication added. One basic parameter table covers every option; not a separate product.
Official datasheet: JK-BD4A24S-4P Product specification, Version 19.0.1 Rev 19.0.1 · Checked · Earlier documentManufacturer SKU JK-BD4A17S4P
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