REFERENCE DESIGN 48V

REFERENCE DESIGN 48V Datasheet

REFERENCE DESIGN 48V BMS Board

Part	Datasheet
REFERENCE DESIGN 48V	REFERENCE DESIGN 48V (pdf)

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Application Note 48V-BMS-AN01 General Description 48V-BMS AN01 General Description page 1/15 48V-BMS-AN01 General Description Table of Contents General Description 3 Kit Content 3 Getting Started 3 Hardware 4 Configuration 5 Cell 5 Current path 5 Software 6 Main Tab 6 Board Schematics, Layout and 9 Ordering & Contact Information 13 RoHS Compliant & ams Green Statement 14 Copyrights & 15 Owner gheh Description Initial release page 2/15 48V-BMS-AN01 General Description 1 General Description This document describes the 48V BMS Board. The 48V-BMS is a demonstrator solution for monitoring and safely operating a 48V battery stack such as the ones used in modern car supply nets and in many other mobility applications like ebikes and scooters. The board incorporates: • A cell supervision and balancing portion for up to 14 series connected cells • Pack current and voltage monitoring via a copper shunt on the + terminal of the battery • A N-mosFET disconnect switch on the + side of the battery • A CAN communication interface for status messaging The board is meant to be used in conjunction with the USB Interface Board and the 48V-PC GUI however you can connect the CAN Interface to any other CAN compatible device and evaluate the status messages there. Kit Content The kit consists of the dual layer PCB 48V-BMS and an eSATA Cable which is used to connect to the USB-Interface Board. Figure 1 48V-BMS Board 2 Getting Started To operate this Board you should at first download and install the 48V-BMS GUI from here Once the software is installed you can connect the USB Interface Board to the 48V-BMS via the provided eSATA cable and afterwards connect the USB Interface Board to the PC via the USB cable. page 3/15 48V-BMS-AN01 General Description 3 Hardware Description The 48V-BMS board is powered via the cell connector J3. A dc-dc converter steps down the input voltage to 5V which is used to power most of the circuitry. Current is routed through connectors A & B. They form a high current sensing path on the + side of the load circuit. Current is measured through the small voltage drop across the thin strip of copper on top of the AS8510 sensing chip. The copper resistance change is compensated in software. Balancing is done passively via two AS8506 chips using discharge resistors. Figure 2 PCB Top Side Diagram Table 1 Connection Diagram La Name bel A +Terminal Design ator Info + Connection to battery B + Switched Terminal + Connection to load C Cell Connector Connection for cell measurement and balance D CAN Standard CAN Interface E JTAG/SWD J2 Tag-connect Adapter for programming page 4/15 48V-BMS-AN01 General Description 4 Configuration Cell connection Figure 3 Battery Connector Cells should be connected according to the pinout of the Battery plug. There are 3 GND 2xGND + Cell0 2 Mid-Stack Cell7 + MID and 3 VPP Cell14 + 2xTOP connections respectively which shall be tied together directly at the battery. 7 Ordering & Contact Information SAP number #990600868 Ordering Code REFERENCE DESIGN 48V BMS Board Buy our products or get free samples online at: Technical Support is available at: For further information and requests, e-mail us at: For sales offices, distributors and representatives, please visit: Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten Austria, Europe Tel +43 0 3136 500 0 Website: page 13/15 48V-BMS-AN01 General Description 8 RoHS Compliant & ams Green Statement RoHS The term RoHS compliant means that ams products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes. ams Green RoHS compliant and no Sb/Br ams Green defines that additionally to RoHS compliance, our products are free of Bromine Br and Antimony Sb based flame retardants Br or Sb do not exceed by weight in homogeneous material . Important Information The information provided in this statement represents ams knowledge and belief as of the date that it is provided. ams bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams and ams suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. page 14/15 48V-BMS-AN01 General Description 9 Copyrights & Disclaimer Copyright ams AG, Tobelbader Strasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with ams AG for current information. This product is intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams AG for each application. This Product is provided by ams “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. ams AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services. page 15/15

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Application Note 48V-BMS-AN01 General Description
48V-BMS

AN01 General Description
page 1/15
48V-BMS-AN01 General Description

Table of Contents

General Description 3

Kit Content 3

Getting Started 3

Hardware 4

Configuration 5

Cell 5

Current path 5

Software 6

Main Tab 6

Board Schematics, Layout and 9
Ordering & Contact Information 13

RoHS Compliant & ams Green Statement 14

Copyrights & 15

Owner gheh

Description Initial release
page 2/15
48V-BMS-AN01 General Description
1 General Description

This document describes the 48V BMS Board. The 48V-BMS is a demonstrator solution for monitoring and safely operating a 48V battery stack such as the ones used in modern car supply nets and in many other mobility applications like ebikes and scooters. The board incorporates:
• A cell supervision and balancing portion for up to 14 series connected cells
• Pack current and voltage monitoring via a copper shunt on the + terminal of the battery
• A N-mosFET disconnect switch on the + side of the battery
• A CAN communication interface for status messaging

The board is meant to be used in conjunction with the USB Interface Board and the 48V-PC GUI however you can connect the CAN Interface to any other CAN compatible device and evaluate the status messages there.

Kit Content

The kit consists of the dual layer PCB 48V-BMS and an eSATA Cable which is used to connect to the USB-Interface Board.

Figure 1 48V-BMS Board
2 Getting Started

To operate this Board you should at first download and install the 48V-BMS GUI from here Once the software is installed you can connect the USB Interface Board to the 48V-BMS via the provided eSATA cable and afterwards connect the USB Interface Board to the PC via the USB cable.
page 3/15
48V-BMS-AN01 General Description
3 Hardware Description

The 48V-BMS board is powered via the cell connector J3. A dc-dc converter steps down the input voltage to 5V which is used to power most of the circuitry. Current is routed through connectors A & B. They form a high current sensing path on the + side of the load circuit. Current is measured through the small voltage drop across the thin strip of copper on top of the AS8510 sensing chip. The copper resistance change is compensated in software. Balancing is done passively via two AS8506 chips using discharge resistors.

Figure 2 PCB Top Side Diagram

Table 1 Connection Diagram

La Name bel

A +Terminal

Design ator

Info
+ Connection to battery

B + Switched Terminal
+ Connection to load

C Cell

Connector

Connection for cell measurement and balance

D CAN

Standard CAN

Interface

E JTAG/SWD J2

Tag-connect Adapter for programming
page 4/15
48V-BMS-AN01 General Description
4 Configuration Cell connection

Figure 3 Battery Connector Cells should be connected according to the pinout of the Battery plug. There are 3 GND 2xGND + Cell0 2 Mid-Stack Cell7 + MID and 3 VPP Cell14 + 2xTOP connections respectively which shall be tied together directly at the battery.
7 Ordering & Contact Information

SAP number #990600868
Ordering Code

REFERENCE DESIGN 48V BMS Board

Buy our products or get free samples online at:

Technical Support is available at:

For further information and requests, e-mail us at:

For sales offices, distributors and representatives, please visit:

Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten Austria, Europe

Tel +43 0 3136 500 0 Website:
page 13/15
48V-BMS-AN01 General Description
8 RoHS Compliant & ams Green Statement

RoHS The term RoHS compliant means that ams products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes.
ams Green RoHS compliant and no Sb/Br ams Green defines that additionally to RoHS compliance, our products are free of Bromine Br and Antimony Sb based flame retardants Br or Sb do not exceed by weight in homogeneous material .

Important Information The information provided in this statement represents ams knowledge and belief as of the date that it is provided. ams bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams and ams suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
page 14/15
48V-BMS-AN01 General Description
9 Copyrights & Disclaimer

Copyright ams AG, Tobelbader Strasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.

Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with ams AG for current information. This product is intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams AG for each application. This Product is provided by ams “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed.
ams AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services.
page 15/15

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived REFERENCE DESIGN 48V Datasheet file may be downloaded here without warranties.

Datasheet ID: REFERENCE DESIGN 48V 519570