Battery management system of flow battery

Abstract

The present application relates to a battery management and control system for a flow battery. An example battery management and control system includes an alternating current distribution box, a rectifying and inverting device, a flow battery including a battery pack that outputs direct current power, a positive electrode pump driver, and a negative electrode pump driver. The rectifying and inverting device connected to the battery pack inverts the direct current power into alternating current power and outputs the alternating current power. The alternating current distribution box is connected respectively to a power grid, the rectifying and inverting device, the positive electrode pump driver and the negative electrode pump driver. The box continuously supplies alternating current power to at least one of the positive electrode pump driver, the negative electrode pump driver or an additional system from either the power grid or the rectifying and inverting device.

What is claimed is: 
     
         1 . A battery management and control system comprising:
 an alternating current distribution box;   a rectifying and inverting device;   a flow battery comprising:
 a battery pack coupled to the rectifying and inverting device and configured to store and output direct current power; 
   a positive electrode pump driver; and   a negative electrode pump driver,   wherein the rectifying and inverting device is configured to invert the direct current power from the battery pack into alternating current power and to output the alternating current power, and   wherein the alternating current distribution box is connected respectively to a power grid, the rectifying and inverting device, the positive electrode pump driver and the negative electrode pump driver, further configured to continuously supply alternating current power to at least one of the positive electrode pump driver, the negative electrode pump driver or an additional system from either the power grid or the rectifying and inverting device.   
     
     
         2 . The battery management and control system according to  claim 1 , further comprising a transformer connected to a line that is connected to the rectifying and inverting device and the alternating current distribution box. 
     
     
         3 . The battery management and control system according to  claim 2 , wherein the rectifying and inverting device is an energy storage converter. 
     
     
         4 . The battery management and control system according to  claim 2 , wherein the rectifying and inverting device is an uninterruptible power supply (UPS) with a grid-connected operation function, a rectifying function and an inverting function. 
     
     
         5 . The battery management and control system according  claim 3 , wherein the battery pack comprises:
 a plurality of cell stack groups, each cell stack group comprising a plurality of batteries connected in series;   a branch switch configured to connect adjacent batteries among the plurality of batteries;   a line connected to a battery among the plurality of batteries; and   an independent switch connected to the line and configured to connect the line to the rectifying and inverting device.   
     
     
         6 . The battery management and control system according to  claim 5 , further comprising:
 a voltage detection device configured to detect a voltage of the battery pack, and to output a voltage detection signal;   a controller connected to the voltage detection device, and configured to output an off signal when a voltage reflected by the voltage detection signal is higher than a voltage threshold; and   a controllable contact connected to the battery pack and further connected to the positive electrode pump driver and the negative electrode pump driver separately, wherein the controllable contact is connected to the controller, and configured to be turned off responsive to the off signal.   
     
     
         7 . The battery management and control system according to  claim 6 , further comprising a surge protector connected to an output end of the alternating current distribution box. 
     
     
         8 . The battery management and control system according to  claim 7 , wherein the additional system comprises at least one of a cold water system, a hot air system, a fresh air system or a nitrogen generator.