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BMS CIRCUIT
A battery management system (BMS) is any electronic system that manages a rechargeable battery (cell or battery pack), such as by protecting the battery from operating outside its safe operating area, monitoring its state, calculating secondary data, reporting that data, controlling its environment, authenticating it
Monitor
A BMS may monitor the state of the battery as represented by various items, such as:
Voltage: total voltage, voltages of individual cells, or voltage of periodic taps
Temperature: average temperature, coolant intake temperature, coolant output temperature, or temperatures of individual cells
Coolant flow: for air or liquid cooled batteries
Current: current in or out of the battery
Computation
Additionally, a BMS may calculate values based on the below items, such as:[citation needed]
Voltage: minimum and maximum cell voltage
State of charge (SoC) or depth of discharge (DoD), to indicate the charge level of the battery
State of health (SoH), a variously-defined measurement of the remaining capacity of the battery as % of the original capacity
State of power (SoP), the amount of power available for a defined time interval given the current power usage, temperature and other conditions
State of Safety (SOS)
Maximum charge current as a charge current limit (CCL)
Maximum discharge current as a discharge current limit (DCL)
Energy [kWh] delivered since last charge or charge cycle
Internal impedance of a cell (to determine open circuit voltage)
Charge [Ah] delivered or stored (sometimes this feature is called Coulomb counter)
Total energy delivered since first use
Total operating time since first use
Total number of cycles
Temperature Monitoring
Coolant flow for air or liquid cooled batteries
Protection
A BMS may protect its battery by preventing it from operating outside its safe operating area, such as:[citation needed]
Over-current (may be different in charging and discharging modes)
Over-voltage (during charging), especially important for lead-acid and Li-ion cells
Under-voltage (during discharging)
Over-temperature
Under-temperature
Over-pressure (NiMH batteries)
Ground fault or leakage current detection (system monitoring that the high voltage battery is electrically disconnected from any conductive object touchable to use like vehicle body)
The BMS may prevent operation outside the battery's safe operating area by:
Including an internal switch (such as a relay or solid state device) which is opened if the battery is operated outside its safe operating area
Requesting the devices to which the battery is connected to reduce or even terminate using the battery.
Actively controlling the environment, such as through heaters, fans, air conditioning or liquid cooling
Негізгі бет 1S, 2s ,3s,, 4s ,BMS নিয়ে বিস্তারিত আলোচনা//এই ভিডিও দেখলে আর অন্য কোন ভিডিও দেখতে হবে না
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