2BTYN-PGY141PGY Smart BMS-PGY141 and PGY SMART BMS-PGY157

1 PRODUCT SPECIFICATION Product Model: PGY-157 PGY-141 8–24S 40–200A with Temperature Control & Bluetooth Customer Name: Customer Model: Item Specification Item Specification Series Cell Count 8~24S RS485 Interface Not available Applicable Cell Chemistry NMC (ternary lithium) / LiFePO₄ Balance Harness 15P + 11P connectors, 500 mm Continuous Discharge Current 60A、80A、100A、150A、 200A Communication Supported Control IC Integrated solution Discharge Switch Supported GPS positioning Not supported Pre-heating External heating control; supports up to 15A charging- assisted heating Balancing Method Automatic passive balancing (resistor-based discharge balancing) Pre-discharge Function Supported; anti-spark protection; optional configuration (not supported by battery display screen) Current Measurement Internal current sensing supported, up to 1000A Display Interface Supported Battery Temperature Sensing 2 × NTC temperature sensors In the event of any discrepancy between the following descriptions and the above configuration table, the configuration table shall take precedence. PREPARED BY CHECKED BY APPROVED BY CUSTOMER APPROVED Approval Comments: Customer Stamp/ Seal: Date: 2 Shenzhen Dandelion Internet of Things Technology Co.,Ltd Address: Room 312, 3rd Floor, Block B, Launch Tech Industrial Park, No. 4012 Wuhe Avenue, Bantian Street, Longgang District, Shenzhen, China Notes: Upon receipt of the samples and this specification, the customer is requested to provide confirmation in a timely manner. If no response is received within 7 days, the customer shall be deemed to have accepted the parameters specified herein as well as the delivered samples. The images contained in this specification are for reference only and represent general product models. Actual samples may differ slightly. Upon confirmation by both parties, this specification shall become effective and shall be restricted to internal use by the manufacturer and the customer only. This document may not be disclosed or provided to any third party without prior written authorization from the manufacturer. The manufacturer reserves the final right of interpretation of this specification. 3 1. Overview ....................................................................................................................................................... 4 2. Product Functional Features ........................................................................................................................ 4 3. Electrical Characteristics (Ta = 25 °C) ......................................................................................................... 6 4. Communication Description ....................................................................................................................... 11 5. BMS Dimensions:170 mm (L) × 70 mm (W) × 15 mm (H) ........................................................................ 11 6. Reference Drawings and Installation Instructions ...................................................................................... 12 7. Temperature Sensor Installation Precautions ........................................................................................... 18 8. Precautions for Use .................................................................................................................................... 20 9. List of Main Components ............................................................................................................................ 22 10. Product Revision History ..................................................................................................................... 22 4 1. Overview This specification applies to the lithium battery protection boards manufactured by Shenzhen Pugeying Internet of Things Technology Co., Ltd. The product strictly complies with RoHS requirements. With the widespread application of lithium batteries, increasing demands have been placed on battery management systems (BMS) in terms of performance, reliability, and cost-effectiveness. The BMS, commonly referred to as the battery management unit, is responsible for the real-time acquisition, processing, and storage of critical operating data of the battery pack, as well as information exchange with external devices such as the main controller. The BMS is designed to address key aspects of the lithium battery system, including safety, availability, usability, and service life. Its primary functions are to improve battery utilization efficiency, prevent overcharge and over-discharge, extend battery lifespan, and monitor the real-time operating status of the battery. This BMS protection board adopts an integrated system design, combining data acquisition, management, and communication functions into a single platform. 2. Product Functional Features • Supports cell voltage and pack voltage monitoring, including over-voltage and under-voltage alarm and protection functions. • Supports charge and discharge over-current detection, alarm, and protection. • Supports real-time temperature monitoring of battery cells and MOSFETs, including: o Cell high-temperature and low-temperature alarm and protection o MOSFET high-temperature alarm and protection • Supports output short-circuit detection and protection. • Supports automatic passive balancing, enabling balancing of unbalanced cells during charging. • Supports software-based parameter configuration via a platform application. • Supports current integration (coulomb counting) for capacity estimation. • SOC estimation based on a combined algorithm of coulomb counting and open-circuit voltage (OCV). • Supports cell voltage open-wire detection, individual cell voltage monitoring, and total pack voltage monitoring. • Provides battery abnormal status alerts, including low-voltage alerts. • Supports real-time monitoring of: o Battery voltage o State of Charge (SOC) o Charge/discharge cycle count o Battery temperature o BMS board temperat…

Text truncated - open the document above for the full version.

Rev 1/26/2023 Shenzhen Dandelion Internet of Things Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 1-04-2026 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BTYN-PGY141 [Shenzhen Dandelion Internet of Things Technology Co., Ltd.] certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. [Shenzhen Dandelion Internet of Things Technology Co., Ltd.] certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24- 886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, Signature： By: Kecai Li Rev 1/26/2023 Shenzhen Dandelion Internet of Things Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 1-04-2026 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BTYN-PGY141 [Shenzhen Dandelion Internet of Things Technology Co., Ltd.] certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, Signature： By: Kecai Li

Shenzhen Dandelion Internet of Things Technology Co., Ltd. U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: January 4, 2026 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BTYN-PGY141 Shenzhen Dandelion Internet of Things Technology Co., Ltd.(“the applicant”) certifies that, as of the date of the filing of the application, CLF Import and Export Limited (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. CLF Import and Export Limited ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: CLF Import and Export Limited FRN: 0033489683 Address: 1312 17th Street #692, Denver, CO 80202, United States Signature: Contact Person: David Chen Tel: +1 949 254 2565 Email: [email protected] Applicant Shenzhen Dandelion Internet of Things Technology Co., Ltd. FRN: 0037806213 Address: Room312, 3rd Floor, Launch Tech Industrial Park, No. 4012 Wuhe Avenue, Bantian Street, Longgang District, Shenzhen, China Signature: Contact Person: Kecai Li Tel: 15818744061 Email: [email protected]

Summary Inverted F Antenna Specification ITEM ANT SPEC Model Name 2.4G ANT Center Frequency Horizontal Vertical 2400MHz 2400MHz 2500MHz 2400MHz 2400MHz 2500MHz -1.26-0.76-0.58-5.25-2.46-1.86 MAX. Gain -0.58dBi Polarization Horizontal and Vertical Azimuth Beam Pattern Omni-directional Antenna type PCB Antenna Impedance 50 Ohm Manufacture Shenzhen Dandelion Internet of Things Technology Co., Ltd. Address Room312, 3rd Floor, Launch Tech Industrial Park, No. 4012 Wuhe Avenue, Bantian Street, Longgang District, Shenzhen, China Antenna Photo & Length (cm) Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Frequency (MHz) Gain(dBi) Max Min Avg 2400 -1.26174-30.0801-7.18716 2450 -0.765802-36.5604-7.48023 2500 -0.585582-22.0315-6.59127 Vertical: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Frequency (MHz) Gain(dBi) Max Min Avg 2400 -5.2537-22.1424-12.4294 2450 -2.4652-24.5837-10.4702 2500 -1.86120-29.5214-9.20432 ANT Test Labs：Attestation of Global Compliance Co., Ltd.

Shenzhen Dandelion Internet of Things Technology Co., Ltd. Date: January 4, 2026 Product Model Number: PGY141, PGY157 FCC ID: 2BTYN-PGY141 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following: • Testing • Approval applications and procedures We declare that QAI Laboratories Ltd. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. Contact Listed on FCC Wesbite Signature： By: Kecai Li Title: Manager Email: [email protected] Telephone: 15818744061 On behalf of: Shenzhen Dandelion Internet of Things Technology Co., Ltd.

Shenzhen Dandelion Internet of Things Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: January 4, 2026 Subject; Request for Confidentiality FCC ID: 2BTYN-PGY141 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure Software Security Requirements for UNII devices It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature： By: Kecai Li Title: Manager

Shenzhen Dandelion Internet of Things Technology Co., Ltd. Model Difference Statement Dear Sir/Madam, FCC ID: 2BTYN-PGY141 Date: January 4, 2026 Added models PGY157 basis of the original product PGY141 The manufacturer declares that the appearance color, model name and appearance shape of the listed series models are different from those of the main model, but the circuit and electronic structure are the same. Sincerely, Signature： By: Kecai Li Title: Manager Email: [email protected] Telephone: 15818744061 On behalf of: Shenzhen Dandelion Internet of Things Technology Co., Ltd.

Report No: SSP25120550-1E FCC ID: 2BTYN-PGY141 Annex of Test Report Annex A. EUT External Photos Model: PGY141 EUT View 1 EUT View 2 Report No: SSP25120550-1E FCC ID: 2BTYN-PGY141 Annex of Test Report EUT View 3 EUT View 4 Report No: SSP25120550-1E FCC ID: 2BTYN-PGY141 Annex of Test Report EUT View 5 EUT View 6 Report No: SSP25120550-1E FCC ID: 2BTYN-PGY141 Annex of Test Report EUT View 7

Report No: SSP25120550-1E FCC ID: 2BTYN-PGY141 Annex of Test Report Annex D. Label and Information FCC Label Sample FCC Labe Size: 4cm x 2cm FCC Label Specifications Text is Black in color and is justified. Labels are printed in indelible ink on permanent adhesive backing or silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Where the EUT is constructed in two or more sections connected by wires and marketed together, the above statement is required to be affixed only to the main control unit. When the EUT is so small or for such use that it is not practicable to place the statement on it, the above information shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user or, alternatively, shall be placed on the container in which the device is marketed. FCC Label Location Label Location

Report No: SSP25120550-1E FCC ID: 2BTYN-PGY141 Annex of Test Report Annex B. EUT Internal Photos Model: PGY141 EUT Internal View 1 EUT Internal View 2 PCB ANT Report No: SSP25120550-1E FCC ID: 2BTYN-PGY141 Annex of Test Report EUT Internal View 3 EUT Internal View 4 Report No: SSP25120550-1E FCC ID: 2BTYN-PGY141 Annex of Test Report EUT Internal View 5 EUT Internal View 6

FCC ID: 2BTYN-PGY141 RF Exposure Evaluation According to KDB 447498 D01 General RF Exposure Guidance v06 and part 2.1093，Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)] · [√f(GHz)] ≤ 3.0 for 1-g SAR, and ≤ 7.5 for 10-g extremity SAR, where f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison Here, The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. For BLE Max Conducted Power(dBm) Tune-up Power(dBm) Max Tune-up Power(dBm) Max Power(mW) Frequency(MHz) Min. distance(mm) Calc. thresholds limit 1.24 1(±1) 2 1.58 2402 5 0.489749 3.0 So a SAR test is not required

Report No: SSP25120550-1E FCC Test Report Page 1 of 31 FCC TEST REPORT FCC ID: 2BTYN-PGY141 Report No. : SSP25120550-1E Applicant : Shenzhen Dandelion Internet of Things Technology Co., Ltd. Product Name : PGY Smart BMS-PGY141 and PGY SMART BMS-PGY157 Model Name : PGY141 Test Standard : FCC Part 15.247 Date of Issue : 2025-12-31 Shenzhen CCUT Quality Technology Co., Ltd. 1F, Building 35, Changxing Technology Industrial Park, Yutang Street, Guangming District, Shenzhen, Guangdong, China; (Tel.:+86-755-23406590 website: www.ccuttest.com) This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd. Report No: SSP25120550-1E FCC Test Report Page 2 of 31 Test Report Basic Information Applicant..................................: Shenzhen Dandelion Internet of Things Technology Co., Ltd. Address of Applicant...............: Room312, 3rd Floor, Launch Tech Industrial Park, No. 4012 Wuhe Avenue, Bantian Street, Longgang District, Shenzhen, China Manufacturer..........................: Shenzhen Dandelion Internet of Things Technology Co., Ltd. Address of Manufacturer........: Room312, 3rd Floor, Launch Tech Industrial Park, No. 4012 Wuhe Avenue, Bantian Street, Longgang District, Shenzhen, China Product Name.........................: PGY Smart BMS-PGY141 and PGY SMART BMS-PGY157 Brand Name.............................: PGYBMS Main Model..............................: PGY141 Series Models..........................: PGY157 Test Standard..........................: FCC Part 15 Subpart C KDB 558074 D01 15.247 Meas Guidance v05r02 ANSI C63.4-2014 ANSI C63.10-2020 Date of Test .............................: 2025-12-25 to 2025-12-26 Test Result...............................: PASS Tested By ................................: (Colin Chen) Reviewed By............................: (Lorzix Luo) Authorized Signatory............: (Lahm Peng) Note : This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd.. All test data presented in this test report is only applicable to presented test sample. Report No: SSP25120550-1E FCC Test Report Page 3 of 31 CONTENTS 1. General Information ....................................................................................................................................................5 1.1 Product Information .............................................................................................................................................5 1.2 Test Setup Information..........................................................................................................................................6 1.3 Compliance Standards ...........................................................................................................................................7 1.4 Test Facilities ........................................................................................................................................................7 1.5 List of Measurement Instruments ..........................................................................................................................8 1.6 Measurement Uncertainty .....................................................................................................................................9 2. Summary of Test Results ........................................................................................................................................... 10 3. Antenna Requirement ............................................................................................................................................... 11 3.1 Standard and Limit.............................................................................................................................................. 11 3.2 Test Result .......................................................................................................................................................... 11 4. Conducted Emissions ................................................................................................................................................ 12 4.1 Standard and Limit.............................................................................................................................................. 12 4.2 Test Procedure.................................................................................................................................................... 12 4.3 Test Data and Results .......................................................................................................................................... 13 5. Radiated Emissions ................................................................................................................................................... 14 5.1 Standard and Limit.............................................................................................................................................. 14 5.2 Test Procedure.................................................................................................................................................... 14 5.3 Test Data and Results .......................................................................................................................................... 16 6. Band-edge Emissions(Radiated) ............................................................................................................................... 20 6.1 Standard and Limit.............................................................................................................................................. 20 6.2 Test Procedure........................................................................................................................................…

Text truncated - open the document above for the full version.

Report No: SSP25120550-1E FCC ID: 2BTYN-PGY141 Annex of Test Report Annex C. Test Photos Radiated Emission Test View Below 1GHz Radiated Emission Test View Above 1GHz