Interface description of the High Voltage BMS(Battery Management System)

July 1, 2022

Latest company news about Interface description of the High Voltage BMS(Battery Management System)

Before we could start assembling the Lifepo4 battery ESS/UPS system, we need to figure out those interfaces&ports in

the front panel of the High Voltage BMS, check the below information.

 

Firstly, let's have a look at this picture, you will see there are AC Input, B+ B- N, ON, OFF...printed on the panel, so many 

ports, what are these ports for? How to connect them correctly? Don't worry, keep on watching.

 

latest company news about Interface description of the High Voltage BMS(Battery Management System)  0

(Center Tap/3-Wire Battery Management System)

 

 

Secondly, in the following tab, you will find some of the names of those Ports and their corresponding usage,

and precautions.  For example, B+ B- are the power ports connected to the battery's total Positive and total 

Negative. 

 

No. Name Explain Precautions

 

1

 

B+ N B-

 

 

The power port connected to the battery's total positive and total negative: for the systems without mid-line, do not connect

the N line.

 

Recommended connecting bolt M8 * 20, torque 8-10N * m

 

2

 

P+ N P-

 

 

Power port connected to charging equipment (UPS) or DC bus: for the systems without mid-line, do not connect

the N line.

 

Recommended connecting bolt M8 * 20, torque 8-10N * m

 

3

 

AC Input

The municipal power supply input port must be taken from the UPS output side

 

85~264VAC

 

1A max

 

4

 

ON OFF

 

 

 

On: the Circuit Breaker is closed;

Off: the Circuit Breaker is disconnected

When the handle of the Circuit Breaker is in the tripping state in the middle position, it needs to be turned to off

before it can be closed

 

5

 

D1 D1 D2 D2

 

Two dry contact outputs reserved

 

Not yet open for use

 

6

 

Start

 

DC start button: start the RBMS system by taking power from the battery side.

The system is connected to the battery. After the circuit breaker is closed, press and wait for the light to light up,

indicating that the system is powered on.

 

 

7

 

 

Status

 

 

System status indicator

System normal: Green Light long bright

Alarm: Yellow light long bright

Self-checking failure and protection status: Red light long bright

Charging: green light flashing

Discharge: red light flashing

Self-checking: red and green light flashing alternately

Pre-charging: yellow light flashing

 

Thirdly, you will further understand the rest ports' explanations and Precautions, what are they used for?

What to do when we connect them?

 

 

Illustration

Silkscreen logo

 

Explain

 

Precautions

 

latest company news about Interface description of the High Voltage BMS(Battery Management System)  1

 

 

 

1 2 4 8

 

ID allocation: when multiple RBMs are used in parallel, the ID is allocated by setting the dial switch. You must start with 1.

The dial switch has 4 bits in total and supports up to 15 RBMs parallel machines

ON: ID+1

ON: ID+2

ON: ID+4

ON: ID+8

 

 

TCP/IP

 

RBMs upper computer system software can be connected to PC through a network cable

The network cable standard is CAT5 or above and can be connected by a cross line or straight line. The line sequence can be according to the standard tia-586a

or tia-568b

 

T-CAN T-485

Terminal matching

Resistance setting during can and 485 communication Setting Description:

(120r), on is valid

For parallel application, only the last one needs to be set; In a single machine application, it can be used flexibly according to the site conditions (interference, communication distance,

etc.)

 

 

 

COM-IN

COM-OUT

RBMs external communication port: In parallel application: communicate with SBMs In stand-alone

Application: communicate with UPS / PCS external

equipment

 

 

 

Must use randomly configured twisted pair shielded wire harness, the wire sequence definition see the wire mark on the wire harness

GND

HMI-B

HMI-A

24V

For external display connection

For SBMS power

supplying connection

 

Please connect the display screen according to the silk screen sequence

BMU-OUT Communication interface with BMU Cascade communication with BMU
latest company news about Interface description of the High Voltage BMS(Battery Management System)  2 RBMs Case grounding point It must be reliably grounded and the grounding resistance is less than 1 ohm

 

Lastly, even if you are still not clear or not sure about these parts, don't worry, just contact us whenever there is difficulty in 

assembly, our sales engineers are always ready to help, they will assist you to work out the issues hand by hand, contact me

if you wish to know more, thank you!

 

https://www.hngce.com/sale-28103689-224s-716-8v-battery-management-system-160a-smart-bms-lifepo4.html

https://www.hngce.com/sale-26486423-ups-ess-solar-bms-lifepo4-120s-384v-160a-lead-acid-battery-management-system.html

 

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