3 results about "State of health" patented technology

The invention discloses a method for detecting an inner connecting resistor of a power battery pack. The method includes the following steps that (1) the alternating current inner resistance Zi of each battery cell is tested before battery modules are assembled; (2) the alternating current inner resistance Zm of each battery module is tested after the battery modules are assembled and before the battery pack is assembled, and the inner connecting resistor comprehensive value Rci of each battery module is calculated through the Zi and the Zm; (3) constant-current discharge is conducted on the power battery pack, the direct current resistance Di of each battery module and the direct current resistance Dp of the battery pack are calculated, and the connecting resistor comprehensive value Rco between the modules is calculated through the Di and the Dp; (4) the inner connecting resistor comprehensive value Rc of the battery pack is calculated through the formula Rc=Rci+Rco; (5) the inner connecting resistor of the power battery pack is evaluated through the Rc. According to the method for detecting the inner connecting resistor of the power battery pack, the structure of the battery pack does not need to be damaged, the Rc can be calculated effectively and conveniently, and therefore support is provided for the connecting resistor design of the battery pack and the electrical property and health condition judgment.

The invention discloses a concrete monitoring detector taking reinforcing steel bars as electrodes as well as a monitoring and detection method of the concrete monitoring detector. The monitoring detector is composed of reinforcing steel bar arrays, electrode array electric cables, a concrete health detector, an upper computer communication interface and an upper computer. The reinforcing steel bar arrays comprise a group A and a group B equal in number, and are alternatively and uniformly ranked in concrete; the concrete health detector comprises electrode selection circuits, series impedance selection circuits, parallel impedance selection circuits, an impedance spectrum measurement circuit and a micro processor; two electrode selection circuits are respectively connected with two groups of reinforcing steel bar electrodes; the impedance spectrum measurement circuit measures the impedance spectrum data of concrete impedance combination circuits among the series impedance selection circuits, the parallel impedance selection circuits and the selected electrode pairs; the microprocessor receives the control by the upper computer, and the programs of the microprocessor comprise monitoring mode, detection mode and numerical reading mode subprograms; and the upper computer communication interface protocol is sent by a data packet. The system is convenient and reliable to use, and can detect and monitor the health status of concrete in real time.