3results about How to "Fast equalization" patented technology

The present invention relates to the field of battery management, and discloses a multi-channel and multi-mode lithium battery charge and discharge balance management device, including: a PFC rectifier circuit, an LLC circuit and multiple Buck charge and discharge regulation circuits; one side of the PFC rectifier circuit is connected to an AC power grid, and the other side is electrically connected to one side of the LLC circuit; the other side of the LLC circuit is connected to multiple independent Buck charge and discharge regulation circuits; the PFC rectifier circuit converts the AC power grid voltage into a DC high voltage; the LLC circuit isolates and converts the DC high voltage from the PFC rectifier circuit into multiple stable low-voltage DC power; the Buck charge and discharge regulation circuit converts the low-voltage DC power from the LLC circuit into the voltage required by the single cell battery to achieve its balanced supplementary charging; at the same time, the Buck charge and discharge regulation circuit can also independently make its switch tube work in the linear region to achieve its balanced discharge. The invention has the beneficial effects of: having the characteristics of electrical isolation, fast balancing speed, flexible balancing mode, continuously adjustable balancing current, strong scalability, etc.

The invention belongs to the field of battery equalization, and discloses a quasi-resonance equalization circuit based on bus LC and a control method, the quasi-resonance equalization circuit comprises n batteries, 2n MOSFET switch tubes, n-1 LC energy storage modules and a switch controller; the n batteries are connected in series; and the LC storage module comprises a balancing capacitor C and a resonant inductor L which are connected in series. According to the invention, the equalization of the series battery pack can be realized, the control is simple, the equalization of any battery to any battery is realized, the distribution condition of initial voltage does not need to be considered, and the time required from the beginning of equalization to the end of equalization is irrelevant to the position of each battery monomer; the equalization speed is irrelevant to the number of the series batteries, after equalization is finished, the voltage difference of the batteries is small, and the voltage tends to be consistent.

The application relates to a battery equalization method and device, a battery management system, equipment and a storage medium. The device is applied to a battery pack comprising a plurality of battery monomers connected in series, and the device comprises a transformer, an isolation switch and a control unit. The primary winding of the transformer is connected with a total positive electrode and a total negative electrode of the battery pack, the secondary winding of the transformer comprises a plurality of secondary windings, and the plurality of secondary windings are connected with the plurality of battery monomers in the battery pack one by one. The isolation switch assembly corresponds to the plurality of battery monomers in the battery pack one by one, and each isolation switch assembly is connected in series between the corresponding battery monomer and the secondary winding. The control unit is connected with the battery monomer and the isolation switch assembly to detect the voltage signal of each battery monomer and control the isolation switch assembly to be closed according to the voltage signal, so that the transformer balances the energy among the battery monomers in the battery pack. The application solves the problems of high cost, high complexity and slow equalization speed of the battery equalization function of the BMS system.