7results 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 present invention discloses a double modular parallel flyback energy balancer for a series battery pack and a control method thereof, comprising i balancing modules, wherein the i balancing modules are formed by 5i MOSFET switches with anti-parallel diodes, i flyback transformers, and i battery cells connected in series, and the i balancing modules are used to form an inductance balancing module and a flyback transformer balancing module. The present invention uses an inductance balancing module to perform the first balancing in a static state, wherein the circuit structure of the inductance balancing module is simple and each module is independent of each other, and each inductance balancing module works simultaneously during balancing, and the balancing speed is fast, and the device is easy to control and implement; the second balancing is implemented by using a flyback transformer balancing module, wherein the topological circuit principle of the balancing is simple, the control capability of the balancing current is strong, the balancing energy transfer efficiency is high, and each flyback transformer balancing module is independent of each other, and each flyback transformer balancing module works simultaneously during balancing, and the balancing speed is fast.

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 invention belongs to the field of electrochemical energy storage, and particularly relates to a battery module equalizer, an energy storage system and a management method thereof, and the energy storage system is obtained based on the battery module equalizer. The battery module equalizer comprises a main control chip, a battery monitoring module, a voltage conversion module and a battery cell equalization circuit, the battery monitoring module is used for monitoring state information; the voltage conversion module is used for balancing the battery modules by adjusting charging and discharging voltages of the battery modules; the battery cell equalization circuit is used for equalizing each battery cell in the battery module; and the main control chip is used for uploading the state information, receiving an equalization instruction generated according to the state information, and controlling the cell equalization circuit and / or the voltage conversion module to execute the equalization instruction according to the equalization instruction. According to the invention, the problem of battery cell equalization in a single battery module is solved, the problem of equalization among the battery modules in the cluster is solved, and finally, equalization among all battery cells in the cluster is really realized.

The invention discloses a modularized high-performance battery equalizer which comprises a battery pack formed by connecting a plurality of lithium battery units in series, a transformer and an RCD absorption circuit, the equalizer adopts a layered parallel equalization mode, two switch tubes of a first layer are complementarily conducted, an energy transfer path is short, and a switch tube of a second layer starts to work after equalization of the first layer is completed. The primary winding and the secondary winding of the transformer are connected in parallel with an RCD absorption circuit used for absorbing peak voltage when the switching tube is switched on. The equalizer adopts a modular design and is connected in parallel through a multi-winding transformer, and the rated power of a used power device is low and is irrelevant to the number of series battery packs.

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.

The invention relates to the field of battery management, and discloses a multi-channel and multi-mode lithium battery charge and discharge equalization management device, which comprises a PFC (Power Factor Correction) rectifying circuit, an LLC (Logical Link Control) circuit and a plurality of Buck charge and discharge regulating circuits, one side of the PFC rectifying circuit is connected with an alternating current power grid, and the other side of the PFC rectifying circuit is electrically connected with one side of the LLC circuit; the other side of the LLC circuit is connected with a plurality of independent Buck charging and discharging adjusting circuits; the PFC rectifying circuit converts alternating-current power grid voltage into direct-current high voltage; the LLC circuit isolates and converts the direct-current high voltage from the PFC rectifying circuit into multiple paths of stable low-voltage direct current; the Buck charging and discharging adjusting circuit converts low-voltage direct current from the LLC circuit into voltage needed by the single battery, and balanced supplementary charging of the single battery is achieved. Meanwhile, the Buck charging and discharging adjusting circuit can independently enable a switching tube to work in a linear region, and balanced discharging is achieved. The invention has the advantages of electrical isolation, fast equalization speed, flexible equalization mode, continuous and adjustable equalization current, strong expandability and the like.