INTEGRATED DC/DC CONVERTER, ELECTROCHEMICAL ENERGY STORAGE SYSTEM, AND METHODS FOR ANALYZING ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY AND WORKING STATE OF ELECTROCHEMICAL ENERGY STORAGE APPARATUS

摘要

An integrated DC/DC converter includes a first DC/DC converter, a second DC/DC converter, a first voltage sensor, a second voltage sensor, a first current sensor, a second current sensor, a third current sensor, and a controller. The first DC/DC converter has an input end and an output end. The input end of the first DC/DC converter is to be electrically connected to an output end of an electrochemical energy storage apparatus. The output end of the first DC/DC converter is to be electrically connected to an input end of an electrical load. The second DC/DC converter connects the first DC/DC converter in parallel.

主权项

1. An integrated DC/DC converter comprising:
a first DC/DC converter comprising a first DC/DC converter input end that is electrically connected to an electrochemical energy storage apparatus, and a first DC/DC converter output end that is electrically connected to an electrical load input end; a second DC/DC converter connected to the first DC/DC converter in parallel; a first voltage sensor electrically connected in parallel with the first DC/DC converter input end, the first voltage sensor is capable of detecting an electrochemical energy storage apparatus output voltage; a second voltage sensor electrically connected in parallel to the first DC/DC converter output end, the second voltage sensor is capable of detecting a first DC/DC converter output voltage; a first current sensor connected in series to an electrochemical energy storage apparatus output end, the first current sensor is capable of detecting an electrochemical energy storage apparatus output current; a second current sensor connected in series to an second DC/DC converter input end, the second current sensor is capable of detecting a second DC/DC converter input current; a third current sensor connected in series to the first DC/DC converter output end, the third current sensor is capable of detecting a first DC/DC converter output current; and a controller receiving signals from the first voltage sensor, the second voltage sensor, the first current sensor, the second current sensor, the third current sensor, and the forth current sensor; the controller is capable of controlling the first DC/DC converter to adjust an output of the electrochemical energy storage apparatus and controlling on and off of the second DC/DC converter, and the controller is also capable of controlling the second DC/DC converter at an on state to adjust the electrochemical energy storage apparatus output current in a current disturbance way to obtain an electrochemical impedance spectroscopy of the electrochemical energy storage apparatus.