5results about How to "Shorten equalization time" patented technology

The invention discloses a liquid metal battery module active equalization device and a control method, and the device comprises an equalization controller which is used for controlling the selection of equalization channels, combining a plurality of adjacent batteries with the same SOC into a battery segment, and taking the battery segment as a basic unit for active equalization control; performing charging equalization on each battery section, selecting a group of non-adjacent battery sections as active equalization of the current round, and ending active equalization of the current round when the battery section with the maximum SOC in the selected basic unit for equalization is charged to the maximum SOC value of the single battery in the series battery module; updating the SOC of each single battery in the current series module, and repeating the battery segment merging and battery equalization operations until the SOC of each single battery in the battery module is equal; the charger is used for charging the battery segments. The equalization device disclosed by the invention can solve the problems of difficulty in series module equalization and low efficiency caused by inconsistency of high-capacity liquid metal batteries.

The utility model relates to supercapacitor active equalization field discloses a kind of supercapacitor active equalization circuit, including MCU, AFE (analog front end), light MOS tube drive circuit, H bridge circuit, DC / DC isolated bidirectional power supply and rechargeable battery, the light MOS tube drive circuit includes Q1 pipe, Q2 pipe, Q3 pipe and Q4 pipe, the Q1 pipe, Q2 pipe, Q3 pipe and Q4 pipe are connected with the both ends of single supercapacitor monomer respectively, the input end of AFE (analog front end) is connected with RC filter network, the MCU is connected with light MOS tube drive circuit by SPI, the MCU is electrically connected with rechargeable battery.The utility model in the high voltage supercapacitor monomer is stored energy by rechargeable battery, avoid energy loss consumptive waste, reach the goal of active equalization, using rechargeable battery and the fast power supply mode of DC / DC isolated bidirectional power supply, active equalization for low voltage average value voltage's battery, shortens equalization time.

The embodiment of the invention discloses an electric energy balancing method and device, electronic equipment and a storage medium. The charge states of a plurality of electric energy storage units included in the energy storage system are obtained, and the electric energy storage units have a connection relation; based on the charge state, determining a first electric energy storage unit needing to be discharged and a second electric energy storage unit needing to be charged in the plurality of electric energy storage units; determining a first target charge state and a second target charge state based on the number of the first electric energy storage units and the number of the second electric energy storage units; and controlling the first electric energy storage unit to discharge the second electric energy storage unit by taking the first target charge state as a discharge target of the first electric energy storage unit and the second target charge state as a charge target of the second electric energy storage unit. Therefore, the electric energy equalization rate and the electric energy equalization efficiency can be improved.

The utility model discloses a modularized layered fast equalization circuit, comprising 4N batteries, the 4N batteries are connected in series, every four adjacent batteries form a battery pack, each battery pack is connected with an intra-pack equalization module to form a battery module, N battery modules are connected in series, each battery module is connected with an inter-pack equalization module, and the N inter-group equalization modules are connected in parallel. According to the utility model, the equalization time is shortened, and the equalization efficiency is improved. According to the utility model, a plurality of single batteries in the battery pack can be equalized, and a battery module composed of a plurality of single batteries can be equalized, so that the battery equalization accuracy and equalization efficiency are improved.

This invention relates to the field of battery monitoring technology, specifically to an external access charging and discharging data acquisition module for a power battery pack. The method includes: a cell group, a single cell voltage monitoring unit, an equalization unit, a microcontroller unit, a communication unit, and a power supply unit. The cell group consists of N cells connected in series. The single cell voltage monitoring unit has a differential channel for each cell and converts it to a single-ended voltage via differential / single-ended conversion. The equalization unit has a dissipation branch for each cell containing an isolated gate driver, an MCU-controlled N-channel MOSFET, and a power resistor, along with an overcurrent fuse and overvoltage clamp. The microcontroller unit collects the single-ended voltage of each cell via a low-pass filter and controls the equalization. The algorithm averages and calibrates the voltage for each cell ≥10 times, using the lowest voltage as a reference. The equalization is activated when the difference is ≥ a threshold. The collection is paused during the hold period and then cycled again. This method is applicable to both charging and discharging. The communication unit connects to a CAN controller and transceiver via SPI, encapsulating the single cell voltage into a two-byte CAN frame for uploading to the bus. The power supply unit obtains a first bus from the total voltage drop for monitoring and equalization, and then linearly regulates it to obtain a second bus for the MCU and communication. This invention can solve the problems of inconsistent voltage / SOC during the charging and discharging process of series-connected power cells, making it difficult to accurately collect and quickly equalize the data without modifying the original system; the data collection process is easily affected by the equalization current; and there is a lack of remote online monitoring.