Time:Feb 24, 2023 Views:697
Large battery arrays can be used as a energy storage system for backup and continuous power supply. This usage is getting more and more attention. Tesla Motors has recently launched the home and commercial PowerWall system that proves this. The battery in this system is continuously charged by the grid or other energy, and then provides users (AC) to the user through the DC/AC inverter.
It is not new to use battery as a backup power supply. At present, there are many battery backup power systems, such as basic 120/240V AC and hundreds of watts of desktop PC short -term backup power system, ships, hybrid cars or full electric types The power supply system of a kilowatt special car ship used in the car, the power grid -level hundred -way backup power system used by the telecommunications system and the data center (see Figure 1) ... and so on. Although the advancement of battery chemistry and the advancement of battery technology has attracted great attention, there is also a part that is the same for a feasible and based on the backup system of battery, which is the battery management system (BMS).
According to the battery backup power supply, it is very suitable for the fixing and mobile use of hundreds of KW power from a kilowatt to hundreds of KW power, which can be powered by reliable and effective use.
There are many fighters when the battery management system is completed by energy storage. The solution is by no means simply "expand" from the management system of small and lower capacity battery packs. Instead, new, more complicated strategies and key support components need to be needed.
The starting point of the war is that the measurement value of many key battery parameters is required to have high accuracy and credibility. In addition, the planning of the sub -system must be modular, so that the configuration can be customized in accordance with the specific requirements used, and it is also necessary to consider possible expansion requirements, all management issues, and necessary maintenance.
The working environment of the larger storage array also brings other major battles. In the case where the inverter voltage is very high/the current is large and the current peak generates the current, BMS must also provide accurate and common data in an environment with high noise and a high temperature environment. In addition, BMS must also provide extensive "fine" data for internal modules and system temperature measurement values, rather than a few rough total data, because these data are crucial for charging, supervision and discharge.
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