34results about How to "Meet fast charging needs" patented technology

The invention relates to technical field of a lithium ion battery, in particular to an electrolyte of a rapid-charging lithium ion battery. The electrolyte comprises a solvent, a lithium salt and an additive, wherein the solvent contains more than two mixtures of linear carbonic ester with a low boiling point, linear carboxylic ester, fluorobenzene and hydrofluoroether, and the additive comprises a first additive for negative electrode film forming, a second additive for improving the cycle performance of the battery and a third additive for improving the high-temperature performance of the battery. Compared with the prior art, the organic solvent and the three additives are used in a combination way to generate a synergistic effect, the rapid charging demand of a high-potential, high-compaction-density and more than 2C rapid-charging system battery with a voltage of 4.35V and negative electrode compaction density of over 1.6g/cm<3> can be met, and meanwhile, the electrolyte has favorable cycle performance and high- and low-temperature performance.

The invention discloses an energy control method of a laser wireless power transmission system based on the efficiency optimization, and belongs to the technical field of laser wireless power transmission. An energy control strategy is mainly composed of an efficiency optimized control strategy and an energy management optimization strategy. In the efficiency optimized control strategy, under the premise that the output power of a photovoltaic array meets the load and storage battery power requirements, an efficiency optimized operating point of the system is searched by gradually reducing the pulse width of an input pulse current of a laser. In the energy management optimization strategy, the system efficiency and system charging power are taken as control objectives, the pulse width of an input current of the laser is further reduced to search for an optimum operating point of the system, the average output power of the laser is properly reduced in the searching process of the optimum operating point of the system to maintain the output voltage ripple of the photovoltaic array within a limited range thereof, the impact of excessive voltage ripple on the efficiency of the photovoltaic array is avoided, the rapid storage battery charging needs are thus met and meanwhile the system is allowed to operate at the efficiency optimized point.

The invention provides a negative plate and a lithium ion battery comprising the same. According to the invention, the active substance and the surface density of the negative plate are specifically designed according to the potential and polarization distribution of the negative plate, so the design of the battery can meet the rapid charging requirement to the greatest extent, the waste of energydensity can be reduced, and both rapid charging and high energy density are realized. In a simple way, a double-layer coating technology is utilized to control the proportion of the two active material layers in the length range of the negative electrode current collector in the length direction, i.e., the proportion of the first negative electrode active material layer with large polarization and low potential is large, and the proportion of the second negative electrode active material layer with small polarization and high potential is small. The energy density of the negative plate is improved compared with the energy density of a conventional negative plate, so both quick charging and high energy density can be realized.

The invention discloses a multipath charging circuit, which comprises: a first-stage power converter for converting an AC input voltage into a DC power supply voltage; a plurality of second-stage power converters connected with the first-stage power converter and used for converting the DC power supply voltage into a plurality of charging voltages; a plurality of charging ports respectively connected with the plurality of second-stage power converters and used for charging electric equipment; and a protocol control module used for generating a first control signal according to the protocol parameters of the electric equipment connected to the plurality of charging ports so as to adjust the DC power supply voltage, and generating the control signals of the plurality of second-stage power converters so as to adjust the plurality of charging voltages. According to the invention, the protocol control module of the multipath charging circuit supports protocol communication and analysis of aplurality of charging ports, obtains a direct-current power supply voltage reference value according to the protocol parameters and provides respective control signals for a plurality of second-stagepower converters to realize flexible adjustment of the direct-current power supply voltage so as to support independent control and simultaneous quick charging of a plurality of electric equipment.

The invention provides a negative plate and a laminated lithium ion battery comprising the negative plate, and the laminated lithium ion battery using the negative plate can effectively improve the quick charging capacity of the laminated lithium ion battery on the premise of keeping the energy density not lost. The negative plate adopts the double-layer coating technology, the active substances and the surface density of the negative plate are specifically designed according to the potential and the polarization distribution of the negative plate, and the edge position of the negative plate is controlled to adopt double-layer coating by utilizing the double-layer coating technology; on the one hand, the accumulation mode of negative electrode active material particles can be changed through double-layer coating, edge polarization is reduced, reaction places are increased, internal resistance is reduced, and lithium precipitation cannot be generated on the edge; on the other hand, compared with single-layer coating, the double-layer coating can ensure that the charging speed capable of being supported under the same surface density is higher, so that the energy density cannot be lost.

The invention provides a photovoltaic energy storage charging direct current micro-grid control method, and belongs to the field of direct current micro-grid control. According to the photovoltaic energy storage charging direct current micro-grid control method, direct current busbar voltage is firstly determined, and a control mode of a direct current micro-grid is chosen; in mode 1, a maximum power tracking output mode is adopted in a photovoltaic battery, a constant voltage mode is adopted in an energy storage battery to control the busbar voltage, and a super-fast-charge/fast-charge mode is adopted in an electric automobile; in mode 2, a constant voltage mode is adopted in the photovoltaic battery to control the busbar voltage, a current limiting charging mode is adopted in the energystorage battery, and the super-fast-charge/fast-charge mode is adopted in the electric automobile; in mode 3, the maximum power tracking output mode is adopted in the photovoltaic battery, a current limiting constant voltage mode is adopted in the energy storage battery to control the busbar voltage, and a slow charging mode is adopted in charging of the electric automobile; and in mode 4, the state of the photovoltaic battery and the state of the energy storage battery are the same with the mode 3, and a blocking mode is adopted in charging of the electric automobile. According to the photovoltaic energy storage charging direct current micro-grid control method, the busbar voltage can be controlled in all sorts of situations, and stable operation of a photovoltaic energy storage chargingdirect current micro-grid is guaranteed.

The invention provides a slow charging method and an intelligent terminal. The method includes the following steps: when an intelligent terminal is connected with a charging device, whether the intelligent terminal meets a slow charging condition is detected; and if the intelligent terminal meets the slow charging condition, the intelligent terminal is charged slowly. Slow charging is opened whena user does not need fast charging. The need of users for fast charging is satisfied, and the battery is protected to the maximum.

A vehicle-mounted USB intelligent charging device comprises a vehicle-mounted power supply end, a USB interface, a 500mA current-limiting output circuit and a 1000mA current-limiting output circuit, wherein the vehicle-mounted power supply end outputs 5V direct-current voltage, one end of the 500mA current-limiting output circuit is connected with the vehicle-mounted power supply end, and the other end of the 500mA current-limiting output circuit is communicated with the USB interface in an on-off mode. According to the vehicle-mounted USB intelligent charging device, two kinds of current output are achieved by means of arrangement of the 500mA current-limiting output circuit and the 1000mA current-limiting output circuit, the power supply requirement for quick charging of large current and the power supply requirement of mobile terminals of small current are met at the same time, and quick charging can be achieved by means of the vehicle-mounted USB interface.

The invention discloses a fast charging switching circuit and method based on dual-interface plugging detection. The circuit comprises a power supply end, a rectification transformation circuit, a control system, a USB Type-A interface and a USB Type-C interface. A filtering degaussing circuit is connected between the rectification transformation circuit and the USB Type-A interface and between the rectification transformation circuit and the USB Type-C interface. The USB Type-A interface and the USB Type-C interface are connected with a switch unit. The control system is connected between therectification transformation circuit and the USB Type-A interface as well as between the rectification transformation circuit and the USB Type-C interface, and the control system comprises a fast charging control unit and a plugging detection unit. The method is applied to the circuit. According to the invention, the design cost of the circuit can be saved, the detectable equipment range is expanded, the scene switching is more efficient and time-saving, and the quick charging requirement is better met.

The invention discloses an electric vehicle charging system with multiple charging modes and a charging method, belongs to the technical field of electric vehicle charging, and solves the problem of incapability of meeting high-power charging demands or quick charging demands of electric vehicles due to limiting from voltage conversion devices in traditional battery charging stations. Electric energy of a power grid is stored in an expansion structured battery set through an AC/DC converter. When the electric vehicles need to be quickly charged, the power grid and the expansion structured battery set charge the electric vehicles at the same time; when the electric vehicles are slowly charged, the expansion structured battery set is charged by the power grid; when the electric vehicles aredifferent in charging power demands, demanded power of the electric vehicles is judged to be higher than rated output power of a conversion device or not; and if so, the expansion structure and the power grid supply electricity together. The system is suitable for being as electric vehicle charging piles.

The invention belongs to the technical field of rapid charging and cooling of electric vehicles, particularly relates to a combined cooling method and system for a battery pack and a charging pile of an electric vehicle, and aims to solve the problems that in a rapid charging scene, the heat dissipation power of a traditional battery pack and charging pile heat dissipation mode cannot meet the requirement, and a charging interface lacks effective cooling. The method comprises the following steps of: starting self-circulation cooling in a rapid charging state; calculating total heat production, and acquiring a condenser air speed or condensate water flow speed at the current moment; if the system cooling is in a steady state within the time delta t, maintaining self-circulation, otherwise, starting a circulating pump and enabling the circulating pump to operate at a preset rotating speed n, and entering a forced circulation mode; if the system cooling is in a steady state within the time delta t, maintaining a rotating speed of the circulating pump, otherwise, adjusting the rotating speed increment of the circulating pump; and repeatedly executing the steps until the electric vehicle stops rapid charging, and turning off a condenser fan and the circulating pump. The charging pile and the battery pack are cooled at the same time, cost and system energy consumption are reduced, and charging safety and the cooling effect are improved.

The invention discloses an intelligent charging remote controller which comprises a power supply circuit, a high-frequency oscillating circuit, a high-frequency power amplifying circuit, a transmitting coil, a receiving coil, a high-frequency rectifying and filtering circuit, a voltage regulating circuit, a remote controller battery and a remote controller control circuit, according to the invention, the remote controller battery is charged in a wireless charging mode. The remote controller can be better sealed in overall structural design, the waterproof and dustproof level is further improved to a certain extent, inconvenience caused by battery replacement of a traditional remote controller can be avoided when the remote controller is designed, and a charging hole does not need to be formed in the remote controller; when the remote controller battery is charged, the voltage regulating circuit is controlled, the single-chip microcomputer is adopted to dynamically regulate and controlthe charging voltage, and intelligent charging of the remote controller is achieved.

The embodiment of the invention discloses an electronic device, a charging method thereof, and a ultrasonic wave generating device and method. The electronic device comprises a battery, a piezoelectric induction structure, and a resonant structure. The resonant structure generates resonance under the effect of a ultrasonic wave and applies acting force to the piezoelectric induction structure while vibrating in order that the current generated by the piezoelectric induction structure charges the battery. The resonant structure is provided with at least two resonant frequencies in order that the electronic device is provided with at least two charging currents. Thus, the electronic device can be rapidly charged by large charging current when the electric energy of battery is low. Therefore, the charging time of the electronic device is shortened; a requirement of people for rapidly charging the electronic device is satisfied; and user experience is improved. When the electric energy of battery is high (namely the battery is almost fully charged), the electronic device is charged by low charging current in order that damage of large charging current to the battery is reduced.

The invention provides an automatic charging system based on a floor-type pantograph. The automatic charging system comprises the floor-type pantograph, a charging pile and a charging pile. The floor-type pantograph and the charging pile are respectively connected to the charging pile, the floor-type pantograph comprises a floor-type pantograph rack and a pantograph body mounted on the pantographrack, and the charging pile controls the floor-type pantograph and the charging pile to work. According to the technical scheme, the system has a plurality of charging modes of the pantograph and thecharging pile and serves charging vehicles with different charging requirements, the mounting position is flexible, and actual charging requirements are met.

The invention provides a high-capacity battery module with small-capacity battery cells in double parallel connection and a recycling method of the high-capacity battery module. The high-capacity battery module comprises a first-stage parallel battery cell and a second-stage parallel battery cell which is obtained by connecting a plurality of first-stage parallel battery cells in parallel, wherein the first-stage parallel battery cell comprises a plurality of small-capacity battery cells which are connected in parallel. According to the arrangement, when the high-capacity battery module is decommissioned, the two-stage parallel battery cells are split and can be secondarily applied to the field of power supply of corresponding power batteries with small-capacity requirements; and the first-stage parallel battery cell is further split, so that the battery cell can be secondarily applied to the power supply field of corresponding power batteries with lower capacity requirements. Through concentric circle type parallel connection of the hollow-structure battery cells, the internal resistance of the battery cells can be reduced, the heat dissipation effect is improved, and the space layout is more reasonable. According to the invention, the echelon utilization scene of the small-capacity battery cell is expanded, the capacity stability of the battery is improved, the battery monitoring difficulty is reduced, and the utilization value of the battery is fully excavated.

The invention relates to a connection cable in a light fast-charging new energy vehicle and a preparation method. The connection cable comprises a liquid cooling channel, a hollow conductor, an insulation layer, an organosilicon impregnating varnish coating layer and a smooth aluminum protection layer which are sequentially arranged from inside to outside, wherein a temperature measurement optical fiber is arranged in the liquid cooling channel along the length direction of the hollow conductor, and the temperature measurement optical fiber penetrates through the hollow conductor and is connected with an external controller. A hollow aluminum conductor is preferably selected as the hollow conductor, is 30% of the mass of a copper conductor with the same cross section, is smaller in size and occupied space than a stranded aluminum conductor, is suitable for being installed and laid in a new energy vehicle, meets the requirements of light weight of the vehicle and fast charging of the new energy vehicle DC800A-1000A, and it is ensured that the hollow conductor is kept at the constant temperature of 60 DEG C by arranging the temperature measurement optical fiber. Heat generated by large-current charging of the hollow conductor can be quickly dissipated, and the temperature rise of the conductor after charging is less than or equal to 50 DEG C; the smooth aluminum protection layer meets the conditions that the transfer impedance is smaller than or equal to 8 milliohms/m when the frequency is 1-30 MHz, and the shielding attenuation is larger than or equal to 90 Db when the frequency is 30-1000 MHz.

The invention provides an automatic charging system based on a ceiling-type pantograph. The automatic charging system comprises the ceiling-type pantograph, a charging stack and a charging pile; and the ceiling-type pantograph and the charging pile are connected with the charging stack separately, the ceiling-type pantograph includes a ceiling-type frame and a pantograph mounted on the ceiling-type frame, and the charging stack controls the ceiling-type pantograph and the charging pile to work. Through the technical scheme, the system is provided with the charging pile and the ceiling-type pantograph which is flexible in installation position and does not occupies floor space, and can serve charging vehicles with different charging requirements and meet actual charging needs.

The invention relates to the technical field of power banks, and discloses a power bank full-protocol fast charging method. A control panel is arranged in a power bank, and a plurality of fast charging protocols supporting fast charging of various mobile terminals are embedded in the control panel; after the mobile terminals are connected with the power bank through data lines, the mobile terminals send a fast charging request and a fast charging protocol type to the power bank, and the power bank sends a matched fast charging protocol to the mobile terminals according to the fast charging request and the fast charging protocol type sent by the mobile terminals; when the mobile terminals and the power bank successfully shake hands through the matched fast charging protocol, the power bank charges the mobile terminals quickly, and when the mobile terminals and the power bank fail to shake hands through the matched fast charging protocol, the power bank charges the mobile terminals normally; and a plurality of fast charging protocols are embedded in the control panel of the power bank, after the power bank successfully shakes hands with the mobile terminals, the mobile terminals are fast charged by the power bank, the power bank meets the fast charging requirements of various types of mobile terminals, and full-protocol fast charging is achieved.