400V Smart BMS

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Model:BMSP400/12A1
The 400V Smart BMS is suitable for household energy storage systems. It can isolate and convert 48V batteries into high-voltage 400V. It can independently determine charge and discharge. At the same time, it can provide overcharge, over-discharge, over-current, over-temperature, under-temperature, short circuit and reverse connection for the battery pack. The protection function can also provide voltage balancing function during the charging process; it can realize reliable multi-group parallel connection through the CAN bus and communicate with the host computer. It supports cluster management. Each system supports a maximum of 8 clusters, and each cluster supports a maximum of 8 clusters. 16 units in parallel; perform parameter configuration, data monitoring, and software upgrade on the host computer software; intelligent lithium battery BMS is compatible with 15 series and 16- cell lithium battery pack.

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Pre-sale Tips Explanation
2~5 Years Warranty guarantee
Fast response and delivery times

Basic introduction.

The 400V Smart BMS have internally divided into BMU and BDC has two parts. BMU ( Battery Management Unit) realizes functions such as voltage and temperature monitoring of single cells, SOC calculation, operation logic strategy control, parameter setting, external communication and other functions. BDC( Bid i re t i o nal Direct Current Converter is a bidirectional DC conversion circuit between the 48V battery pack and the inverter/ converter, which is used to perform battery constant current, constant voltage charging and discharging, standby, protection and other functions.

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400V Smart BMS

Product Advantages

Condition monitoring

Supports voltage and temperature detection of battery cells as well as voltage and current detection of the entire battery pack. It has SOC and SOH detection calculations , is easy to maintain and use, and maximizes the safety, reliability and service life of the battery.

Alarm management

Supports abnormal alarms such as overvoltage, undervoltage, overcurrent, high and low temperature. Support overvoltage, undervoltage, overcurrent, short circuit, high and low temperature, battery failure, hardware failure and other abnormal protection.

Balancing function

Support real-time balancing of battery cells.

Information reporting: Provides a northbound CAN/RS485 interface to upload alarm and status data through the CAN/RS485 interface.

Integrated BMS and bidirectional DCDC

48V 100AH battery conversion 400V interface supports mixing of different batteries and inverter applications from different manufacturers , realizing full-function intelligent management of lithium batteries.

Parallel power expansion feature

Supports up to 16 groups of batteries in parallel.

Easy to maintain and use

Supports multiple activation methods, forced power-off function, maintenance mode, and automatic arrangement of addresses and physical locations .

400V Smart BMS

Functional Characteristics


1.1 Voltage detection and protection function

It has single cell voltage, overall voltage detection, overvoltage, undervoltage alarm and protection functions. The single cell voltage detection accuracy error is less than ± 10 mV under normal temperature static conditions . The overall voltage is determined by BDC Detection, detection accuracy error ≤ 0.1 V , the alarm and protection parameters can be set through the host computer .

1.2 Current detection and protection function

It has battery charging and discharging current detection, alarm, and protection functions. The charging current is displayed as positive current, and the discharging current is displayed as negative current. Under normal temperature conditions, the current sampling accuracy error is ≤± 2 % . Alarm and protection parameters can be set through the host computer.

1.3 Temperature detection and protection function

It has the function of detecting the battery cell and ambient temperature, and can give alarms and protection during high and low temperature charging and discharging. Within the working temperature range, the temperature sampling accuracy error is less than ± 2 ℃. 8 Cell temperature sensor, 1 Ambient temperature sensor, 4 indivual MOS The temperature of the pipe can be set by the host computer. The default specification of the temperature probe is 10kΩ / 3950 .​​​

1.4 Short circuit protection function

BDC It has the function of detecting and protecting output short circuit.

1.5 Battery pack capacity calculation function

SOC of the battery pack can be calculated, and the SOC estimation accuracy error is ≤±5% ( test method : according to YD / T2344.1- 2011 Related test methods for lithium iron phosphate battery packs for communications).

1.6 Equalization function

The cells in the battery pack can be balanced: when the battery pack is charged, when the single cell voltage reaches the starting equalization voltage and the maximum voltage difference is greater than Balance voltage difference, the single cell that meets the conditions will start the balance function. Supports up to 6 channels to start balance at the same time, and the balance current is 100mA @ 3.6V . The balance start voltage and balance voltage difference can be set through the host computer .

1.7 LED indication function

Has 8 LED​ indicator lights, 4 of which The green lights are battery indicator lights used to indicate the current battery pack SOC, 1 The two red lights are fault indicators used for fault indication during alarm and protection . 1 2 green lights are running instructions , 2 A green light is used to indicate the standby, charging, and discharging status of the battery pack .

1.8 Sleep and wake function

 

Serial number

Sleep or shutdown conditions

wake-up condition

Remark

1

The lowest cell voltage is lower than the cell over-discharge protection value ( can

(set) or the total voltage is lower than the overall over-discharge protection value ( can be set), or the SOC lower than 5%, enter dormancy

Charging, key switch

 

2

Can be forced into sleep through the host computer

Charging, key switch

 

3

Forced shutdown via key switch

button

Can only be turned on via the key switch

State power consumption description: normal standby power consumption ≤15W; hibernation power consumption ≤5mW; shutdown power consumption ≤5mW .

1.9 Communication function

Can communicate with the main control/PCS in isolation via RS485/CAN , upload data, and receive commands .

Can be connected via CAN The bus communicates with multiple groups of other modules in parallel. Each module actively sends out relevant data of the module, receives data from other modules, calculates the capacity of the modules added or cut out, and realizes autonomous current or SOC through logical strategies. Balance to achieve adaptive and self-management functions.



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1.10 Host computer control function

With a friendly host computer interface, you can easily set protection parameters such as overvoltage, undervoltage, overcurrent, overtemperature, undertemperature, as well as functional parameters such as balancing, sleep, capacity, and various alarm parameters through the host computer. When necessary, multiple groups in parallel can be set up to control the upper level controller for charge and discharge. The controller can increase the acquisition of load current, CAN Other module currents of communication, etc., make control management more reliable.

1.11 Upgrade Features

Through the CAN bus or RS485 interface for software upgrade.

1.12 letter of agreement

Support customer protocols, RS485 baud rate is 9600bps, CAN 500kbps .

1.13 Charge and discharge current limiting function

The charging and discharging current limiting function can be realized, and the current limiting value can be set. The maximum current limiting value of the battery is 100A. Usually the charging works in the current limiting mode. When overcurrent protection occurs during charging and discharging, the cut-off mode is generally not used, but the current limiting mode is switched.

1.14 Anti-reverse connection function

Equipped with anti-reverse connection circuit. It can prevent the power board from burning out due to reverse connection of the busbar during parallel installation after the system is powered on. Note: It only supports power-on protection after reverse connection, and does not support online reverse connection.

1.15 Parallel communication function

The parallel communication function of 16 modules can be realized through CAN bus or RS485 interface . Without setting the DIP switch, the factory default address is 1. The address settings can be changed by the host computer or adaptively, and the addresses are automatically arranged corresponding to the physical positions for parallel communication. After parallel connection, the battery pack data can be monitored cyclically through the host computer.

1.16 Current sharing control function

via CAN Communication interface, each BMSP It can receive data information from other battery packs and use adaptive current sharing strategy calculations to achieve discharge current sharing control, or use adaptive capacity balancing strategy calculations to achieve optimal capacity matching charge and discharge.

1.17 Automatic working mode

According to inverter /PCS In the running state, the charging and discharging modes can be automatically switched.

1.18 Data storage function

Supports storage of approximately 100,000 battery status data records.

1.19 DO Function

support 2- way DO output. Under normal working condition, the 2- way DO is in disconnected state.

DO1: Connect to the DI of the next module The address sorting and physical location correspondence can be achieved.

DO2 : Reserved by the system and not available to the public.

1.20 Other functions

There is a DI that can be used to automatically arrange addresses. It contains a fire interface (DI)

There is a charging interface for external power supply, which can be used to charge the battery externally after the battery is discharged. For details, please refer to 3.22. Battery heating function: It can output 4A current and has secondary protection function.

1.21 Backup charging function

This product provides a backup charging port, which can charge the battery through an external power supply. When the power supply is connected from the backup charging port, when the external power supply voltage is higher than the battery voltage, the system automatically charges with a small current. It is suitable for replenishing the battery when it is low and for reducing battery power consumption when the output is no-load. The backup charging port has an overvoltage protection function, and the external power supply cannot be charged if it exceeds 58V.

 

System block diagram 

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400V Smart BMS Parallel Function

1.The smart lithium battery BMS module supports parallel applications and simultaneously increases the backup time or power: a single battery module has a backup power of 5kW and supports 16 modules in parallel.

2. In constant voltage discharge mode, the current-sharing imbalance between battery modules is ≤10%.


Key technical parameters table


Technical Parameters

Rated specifications

Accuracy/Error

Remark

Product size (PCBA)

420 * 1 1 4 * 4 9 mm ( length * width * thickness ) , satisfying 19 inch wide rack mounting requirements.

Heat dissipation method

Natural heat dissipation

Operating mode

Automatically switch between charge and discharge mode, sleep mode, shutdown mode and maintenance mode.

Operating Voltage

330V~450VDC  Rated 384V (48V*8)

Rated charge and discharge power

5000W

≤±2%

Bidirectional, and parameters can be set

Standby power consumption

≤15W

/

 

Battery side static sleep current

≤0.2mA

/

 

Number of single voltage detection channels

16 channels ( can also be used for 15 string batteries )

/

 

Cell voltage detection

2~4.5VDC

≤±10mV

- 20℃~+60℃

Battery current detection

- 320A~+320A

≤±2%

±50A The following error ≤ 1A

High voltage bus current detection

-40A ~+40A

≤±4%

 

 

Temperature detection channels

8 -channel battery temperature

4- way MOS Temperature, 1 -way ambient temperature

≤±2℃ @0℃~+50℃

≤±3℃ @ -40 ℃~+85℃

NTC Specification

10kΩ/3950

Battery total voltage acquisition accuracy

0~60V DC

≤±0.1V

 

Bus voltage collection accuracy

0~650V DC

≤±1V

 

Single cell balancing method

Passive discharge equalization

100mA±20%

V ce l l = 3 . 6 V

heating control

48V DC/4A

When the average battery temperature is lower than the set value, heating starts, when it is greater than the stop heating value, heating stops, no

The charger does not heat

 

 

led

4- way SOC

4- way status indication

 

Operation, alarm, charging,

Discharge

SOC Accuracy

/

≤±5%

According to YD/ T2344.1-2011

Data Storage

≥100000 Historical data records

/

 

Parallel use

Supports 16 groups of batteries in parallel, achieving equal current of charge and discharge


Application Scenario Examples