47results about How to "Balanced management" patented technology

The invention discloses a large-capacity battery converter and control method thereof. The converter of the invention comprises several branch single stage type DC/AC converter modules parallel to one another. Each battery cluster (Battery Cluster BC) converges energy to an AC bus via each branch single stage type DC/AC converter module to be transformed in voltage in order to connect to an AC grid or to operate independently with load. The invention solves the circular current and uniform current problems brought by serial and parallel connection of the battery cluster, and adopts the technology of module combination and alternate balance to effectively improve the system efficiency under low power and power quality at the AC and DC sides and to realize balanced use of the battery cluster. Each battery branch can conduct intelligent charge and discharge management and the control function and the protection function are configured independently to ensure the largest availability of the system. The invention has simple structure, small volume, small energy loss, easy modularization, high reliability, small output harmonic wave, good system expansibility and low requirement to insulating ability of the converter and can operate with reduced capacity when the unit is in failure. The control method of the large-capacity battery converter of the invention is convenient and simple in operation and easy in realization.

The invention discloses a battery management system which comprises a plurality of battery module monitoring units, a master control unit and an equalization module. The maser control unit performs the functions of receiving data information which is transmitted from the battery module monitoring units, communicating with an electric vehicle whole-vehicle control unit and a charger, detecting a total voltage, a total current and an insulativity, estimating the charge state and health state of the battery according to the acquired battery data, and protecting charging and discharging of the battery. The battery management system realizes battery data acquisition, state estimation, equalization management and charging/discharging protection. The voltage, the current and the battery temperature of a lithium battery are measured. Charging or discharging is controlled according to the current state of the lithium battery, thereby preventing overcharging and over-discharging, and ensuring high safety of the lithium battery and the electric vehicle.

The invention relates to a vehicle power battery state detection system comprising a battery detection unit which is used for multiple series-connected batteries to perform total voltage and total current detection and balance management and a battery control unit which uses a distributed structure and is formed in a way of using STM32F103ZET6 as a master controller. The battery detection unit is composed of an integrated chip LTC6804-2, and the isoSPI interface is connected with an ISOSPI isolation type communication interface LTC6820 through a single twisted pair so as to form LTC6804-2 multi-branch configuration, the battery control unit is enabled to realize isolation type SPI data communication, and voltage and temperature detection of a single battery can be completed. Balance management of a battery pack can be performed so that the working temperature of the single battery and the ambient temperature can be guaranteed, charge and discharge of high current can be limited and the system has great anti-interference capability.

The invention discloses a high-voltage lithium battery pack and a portable electrical device comprising the same. The high-voltage lithium battery pack comprises at least three low-voltage charge circuits and at least three lithium battery packs, wherein the input end of each low-voltage charge circuit is connected with a low-voltage power supply source, and the output end of each low-voltage charge circuit is connected with one lithium battery pack for charging the lithium battery pack; and the at least three lithium battery packs are connected in series. The high-voltage lithium battery pack and the portable electrical device comprising the same have the advantages of good portability and good stability.

The invention relates to a balance management system of a battery pack for an electric vehicle and belongs to the relevant technical field of power electronics. The balance management system comprises a battery pack, a switch network and a capacitor bank. The number of capacitors of the capacitor bank is one less than the number of batteries of the battery pack. According to the invention, parallel connected batteries are charged through the characteristic of capacitance, balance management of the battery pack of the electric vehicle is realized, the problem of unbalance of the traditional serially connected battery packs is effectively solved, the service life of the batteries is prolonged and the charge cost is reduced, thereby the running cost of the electric vehicle is decreased.

The invention discloses an automobile and an equalization method and device of a power battery pack, and the method comprises the following steps: obtaining a high-voltage inflection point of a charging curve of a battery cell of the power battery pack, obtaining the capacity of the battery cell according to the high-voltage inflection point of the battery cell, and carrying out the equalization of the battery cell according to the capacity of the battery cell. Therefore, the equalization management of the power battery pack can be realized, the utilization rate of the power battery pack is improved, and the service life of the power battery pack is prolonged.

The invention discloses an intelligent factory management system, which comprises an enterprise OA management module, an enterprise personnel management module, a warehouse management module, a workshop management module, a quality management module and the like, and is characterized in that the enterprise OA management module comprises a comprehensive management unit, an organization informationmanagement unit and an authority maintenance unit; wherein the enterprise personnel management module comprises a personnel information management unit, a personnel assessment unit and a personnel effective man-hour management unit, the warehouse management module comprises a warehouse-in and warehouse-out management unit, a replenishment management unit and a data statistics unit, and the workshop management module comprises a plan making unit, an organization and command unit, a supervision unit and a production unit. The quality management module comprises a detection unit and an inferior-quality product processing unit. According to the invention, highly integrated digital and informationized management of a video monitoring unit, an entrance guard management unit, an anti-theft alarmunit, a fire alarm unit, a factory production unit and the like is realized in a factory.

The invention relates to a device for improving the charge/discharge capability of a lithium battery pack of a power battery system. According to the device, multiple cores of the lithium battery packare sequentially and vertically arranged; the device comprises an MCU, a battery heat management module, a battery consistency management module, a battery voltage collection unit, a battery temperature collection unit and a local storage unit; the battery voltage collection unit and the battery temperature collection unit are connected with each core; and the battery heat management module and the battery consistency management module are also connected with each core. Compared with the prior art, fine management on each core of the lithium battery pack is realized based on battery charge/discharge temperature characteristics, and core-level temperature and voltage can be reasonably allocated and managed; the battery heat management module simultaneously has a heating function and a heatdissipation function, so that the charge/discharge capability of the lithium battery pack under all levels of temperature is effectively enhanced; and meanwhile, the safety performance of the lithiumbattery pack is effectively improved, and the service life of the cores is prolonged.

The invention provides a power balancing method, an energy management system and a collaborative management system of an energy storage system; the physical parameters of each battery container in anenergy storage unit under the current working condition are obtained, and the physical parameters of each battery container are calculated, and the voltage change rate and the capacity change rate ofeach battery container are obtained; then, the voltage change rate and the capacity change rate of each battery container are compared separately, and a power distribution rule corresponding to the relatively large one of the voltage change rate and the capacity change rate is adopted for distributing the power of each battery container in the energy storage unit; and no matter the battery container is located in any one charging and discharging area, the power distribution rule corresponding to the relatively large one of the voltage change rate and the capacity change rate in the area is adopted for distributing power, so that the optimal selection of the power distribution basis is realized, the power distribution accuracy is improved, the balance management for each battery container is effectively realized, and the safety risk is reduced.

The invention provides a distributed wireless charging method and system. The system comprises a primary side device and a secondary side device. The secondary side device comprises a plurality of independent sub battery packs which are arranged at different positions of an electric vehicle in a distributed manner, and independent secondary side receiving coils and battery management systems whichare connected with the sub battery packs at different positions. The independent secondary side receiving coils are matched with primary side transmitting coils of the primary side device. The battery management systems are connected to a secondary side control unit. Charging control and equalization charging management of batteries are carried out through the primary/secondary side control unit.By using the system, balanced management and cooperative work of the vehicle-mounted sub battery packs can be realized, the electromagnetic radiation intensity in the charging process is reduced, andthe charging safety is improved.

The invention discloses a capacity balancing manager for a storage battery pack, and mainly solves a problem that the voltage real-time changes of the storage battery pack in a power supply process causes the imbalanced power supply of the storage battery pack in the prior art. The manager comprises an STM32 single-chip microcomputer, an ADC collection voltage module connected to the STM32 single-chip microcomputer, an internal resistance measurement circuit connected to the STM32 single-chip microcomputer, a relay switching circuit connected to the STM32 single-chip microcomputer, a display circuit connected to the STM32 single-chip microcomputer, a relay switching circuit connected to the STM32 single-chip microcomputer, and a power supply circuit for supplying power to the STM32 single-chip microcomputer. According to the above technical scheme of the invention, the method achieves the quick and accurate capacity detection and charging and discharging maintenance of the storage battery pack, greatly improves the utilization efficiency of the battery pack, greatly prolongs the service life of the battery pack, and is very high in practical value and popularization value.

The invention discloses a hierarchical control method and system for an energy storage device. The method comprises the following steps: collecting a frequency change rate, a frequency deviation and a charge state of each energy storage unit; determining whether the energy storage device participates in frequency modulation according to the frequency change rate, the allowable value, the frequency deviation and the allowable value; when participating in frequency modulation, determining the frequency modulation power of each energy storage unit participating in frequency modulation according to the frequency modulation power direction, the maximum value and the minimum value of the state of charge in each energy storage unit and the frequency fluctuation degree coefficient; the first n energy storage units in the charge state sequence of the energy storage units are taken, and if the absolute value of the sum of the frequency modulation power of the first n energy storage units is not smaller than the absolute value of the reference frequency modulation power of the energy storage device, the first n energy storage units participate in frequency modulation; if the absolute value of the sum of the frequency modulation power of all the energy storage units is smaller than the absolute value of the reference frequency modulation power of the energy storage device, all the energy storage units participate in frequency modulation. Balanced management of the energy storage units with different charge states is realized, and the service life of the energy storage device can be maintained.

The invention relates to an active equalization circuit of a lithium ion storage battery monomer for carrying, and belongs to the field of ground power supplies for carrying. The circuit comprises ground charging and discharging equipment, n monomer equalization modules and n battery monomers; the n battery monomers are sequentially connected in series in a positive-negative manner to form a series circuit; the positive end and the negative end of the series circuit are communicated with the ground charging and discharging equipment; the n single balancing modules are arranged and mounted on an external connecting bottom plate; the monomer equalization modules and the battery monomers are in one-to-one correspondence to form a parallel circuit; and n parallel circuits are formed. According to the invention, the problem of monomer active equalization in the charging process of multiple strings of lithium ion monomers is solved, the characteristics of frequent ground charging and discharging and short flight task work period of the lithium ion storage battery for carrying are met, and the cycle service life of the lithium ion storage battery for carrying and the flight reliability after launching are ensured.

The invention discloses an energy-saving waste water recycling and hot water constant-temperature supplying system. The energy-saving waste water recycling and hot water constant-temperature supplying system comprises a sewage pool and a sewage pipe connected with the sewage pool. A multi-stage heat exchanger used for heat exchange is arranged in the sewage pipe. The energy-saving waste water recycling and hot water constant-temperature supplying system is characterized in that the system further comprises a cold water pipeline; after the cold water pipeline passes through the multi-stage heat exchanger for water temperature exchange, one end of the cold water pipeline is connected with the top of a heat preservation water tank, and the bottom of the heat preservation water tank is connected with the other end of the cold water pipeline; the heat preservation water tank is connected with a heat supply pump which is provided with a heating device; a plurality of water meters are connected to the rear portion of the heat supply pump, and each water meter is connected with a card reader and a water outlet; a water pipe for connecting the heat supply pump and the water meters is provided with a general control valve, and a branch control valve is arranged in the position of each water meter; and the sewage pipe is provided with a general sewage pipe body, a sewage valve and a flushing pipe.