Hunan GCE 240V 250A high voltage BMS with 19 inch 4U iron box for BESS UPS contactor and communication
How does GCE high voltage BMS work:
The electrical power system is one of the only supply networks where the product electricity is consumed instantaneously after it is generated. It is mainly because a safe and reliable means to store electrical energy has been missing. The evolving global landscape for electrical distribution and use created a need for energy storage systems (ESSs), making them among the fastest-growing electrical power system products.
Electrical Management Protection: Current
Monitoring battery pack current and cell or module voltages is the road to electrical protection. The electrical SOA of any battery cell is bound by current and voltage. In many cases, further derating may be applied to reside within the SOA safe zone in the interest of promoting further battery lifespan.
Electrical Management Protection: Voltage
a lithium-ion cell must operate within a certain voltage range. These SOA boundaries will ultimately be determined by the intrinsic chemistry of the selected lithium-ion cell and the temperature of the cells at any given time. Moreover, since any battery pack experiences a significant amount of current cycling, discharging due to load demands and charging from a variety of energy sources, these SOA voltage limits are usually further constrained to optimize battery lifespan. The BMS must know what these limits are and will command decisions based upon the proximity to these thresholds. For example, when approaching the high voltage limit, a BMS may request a gradual reduction of charging current, or may request the charging current be terminated altogether if the limit is reached. However, this limit is usually accompanied by additional intrinsic voltage hysteresis considerations to prevent control chatter about the shutdown threshold. On the other hand, when approaching the low voltage limit, a BMS will request that key active offending loads reduce their current demands. In the case of an electric vehicle, this may be carried out by reducing the allowed torque available to the traction motor. Of course, the BMS must make safety considerations for the driver the highest priority while protecting the battery pack to prevent permanent damage.
Thermal Management Protection: Temperature
At face value, it may appear that lithium-ion cells have a wide temperature operating range, but overall battery capacity diminishes at low temperatures because chemical reaction rates slow down remarkably. With respect to capability at low temperatures, they do perform much better than lead-acid or NiMh batteries; however, temperature management is prudently essential since charging below 0 °C (32 °F) is physically problematic. The phenomenon of plating of metallic lithium can occur on the anode during sub-freezing charging. This is permanent damage and not only results in reduced capacity, but cells are more vulnerable to failure if subjected to vibration or other stressful conditions. A BMS can control the temperature of the battery pack through heating and cooling.
GCE HV-BMS features:
|1||Advanced battery management system---The highly integrated battery management system can realize seamless monitoring.|
Perfect self-checking and running status checking function, with HMI display screen,
|3||Complete and reliable system control and protection strategies, comprehensively guarantee battery safety, and escort to extend the life of battery packs.|
Modular design, configurable and expandable---multiple energy storage units can be
Abundant communication interfaces---multiple RS485, CAN, Ethernet, dry contact input
The communication interface protocol is flexible---the factory comes with the company's
|7||The built-in large-capacity memory chip can store a large amount of key operating data, and an SD card can be added to realize battery historical data storage|
Automatic circulation control and automatic parallel/offline control can easily realize the
GCE high votlage bms introduction:
BMU-battery management unit: BMU is our slave BMS, it has 8S,12-16S,17-24S three types of BMU, from this, we can make many kinds of battery packs according to the weight and size of your cells. but normally, 15S and 16S are first choice for most customers.
RBMS-(Rack BMS), it's our master BMS and most important part of GCE bms. RBMS consist of main PCB, Relays/contactors, charge and discharge current detecting equipments, input and output connectors, breaker, communication ports as Rs485 , CANbus, TCPIP.
SBMS-(Stack bms) SBMS is only use for two or many RBMS in parallel connection. SBMS has a 7 inch touch screen.SBMS also has rich interfaces for PCS/inverter,EMS and other relative systems connection by rs485/CAN, TCPIP communication.
GCE HV-BMS technical parameters:
|Rated Current range||-250A~250A|
|Current sampling accuracy||1.0%FSR|
|Communication interface with PCS||RS485/CAN|
|Communication interface with BMU||CAN|
|Communication interface with GBMS||RS485/CAN|
|Communication with monitoring software/EMS||Ethernet|
|Support IAP upgrade||Yes|
|Support HMI display and parameter settings||No(OptionalPlug in)|
|High voltage power module||Support DC start (optional)|
|Dry contact output (normally open)||None|
|Maximum qty of BMUs||18|
|Connection Way out||Back and front|