34results about How to "Stable charging voltage" patented technology

The invention discloses a rapid forming method of a lithium ion power battery, which is characterized by comprising the following steps of: 1. precharging; 2. settling and aging; and 3. charging by adopting an intermittent depolarized single-stage impulse charging mode until charge is finished. Because the forming process of the invention adopts the intermittent depolarized single-stage impulse charging mode, the impedance of an SEI (Solid Electrolyte Interface) membrane is lowered, thereby reducing the internal resistance of the battery and improving the rate discharge performance of the lithium ion power battery. Because the forming process of the invention adopts an impulse current with a lower frequency, the battery can be naturally depolarized within the impulse-off time, thereby lowering the polarizing effect, stabilizing the charging voltage, improving the charging efficiency, simultaneously avoiding the high requirement brought by a high frequency impulse current charging mode for equipment, improving the utilization efficiency of electric energy and greatly lowering the production cost. The step of precharge is adopted to facilitate the formation of the stable SEI membrane, thereby improving the performance of the battery.

The present application discloses a high voltage electrolyte including an electrolyte solvent which includes a mixture of a dinitrile solvent and a nitrile solvent and is stable at voltage of about 5 V or above. The dinitrile solvent may include at least one selected from the group consisting of malononitrile, succinonitrile, glutaronitrile, adiponitrile, pimelonitrile, suberonitrile, azelanitrile and sebaconitrile. The nitrile solvent may include at least one selected from the group consisting of acetonitrile, propionitrile, butyronitrile, pivalonitrile and capronitrile. The present application also discloses a lithium ion battery including the above high voltage electrolyte. The lithium ion battery exhibits a cyclic performance of greater than about 300 cycles and with a capacity retention of greater than about 80%.

A jolting energy absorbing charging device for an electric vehicle comprises a shock absorbing hydraulic oil cylinder arranged under a chassis of the electric vehicle. One end of the shock absorbing hydraulic oil cylinder is connected with a wheel swing arm through a wheel swing arm fixing hole, and the other end of the shock absorbing hydraulic oil cylinder is connected with a vehicle frame through a vehicle frame fixing hole. The shock absorbing hydraulic oil cylinder is provided with an input one-way check valve and an output one-way check valve. The output one-way check valve is connected with an oil outlet pipe. The input one-way check valve is connected with an oil inlet pipe communicating with an input multi-cylinder distributor, and the input multi-cylinder distributor is connected with a filter net in a hydraulic oil tank. The oil outlet pipe is connected with an output multi-cylinder distributor communicating with an energy storage high-pressure oil cylinder. An energy storage piston and an energy storage spring are arranged in the energy storage high-pressure oil cylinder. An oil return pipe outside an overpressure relief port of the energy storage high-pressure oil cylinder communicates with the hydraulic oil tank. The energy storage high-pressure oil cylinder is connected with an oil inlet of a hydraulic rotating motor through an automatic pressure regulating valve. A coupling reset spring is arranged outside a center shaft of the hydraulic rotating motor and makes contact with a one-way coupling. An electric generator is driven by the one-way coupling through a reducer to generate electricity so as to charge a storage battery. An oil outlet of the hydraulic rotating motor communicates with the hydraulic oil tank.

Disclosed in the invention is a ground charging station for an energy storage type rail transport vehicle. The ground charging station comprises a high-voltage power distribution cabinet, a transformer, a charging device, a networking isolation switch cabinet, and a catenary; a switching device is arranged at a circuit between an input terminal and an output terminal of the networking isolation switch cabinet; the input terminal of the networking isolation switch cabinet is electrically connected with an output terminal of the charging device; and an input terminal of the catenary is electrically connected with the output terminal of the networking isolation switch cabinet. When the energy storage type rail transport vehicle stops in the station, an output terminal of the catenary is electrically connected with an energy storage power supply of the energy storage type rail transport vehicle; and the high-voltage power distribution cabinet, the transformer, the charging device, the networking isolation switch cabinet, and the catenary are arranged in the station. On the basis of arrangement, the ground charging station enables the weight of the rail transport vehicle to be effectively reduced and the space utilization rate of the rail transport vehicle to be effectively improved.

The invention belongs to the field of avionics and particularly relates to a power source power off maintaining circuit. A main power source input channel circuit, a boosted circuit, an energy storage capacity charge circuit, an energy storage capacity discharge channel switch, an internal power source generation circuit, a channel switch control circuit, an input power source sampling circuit, a state control signal generation circuit and a power off timing circuit are arranged between a power source input end and a power source output end. The power source power off maintaining circuit is not influenced by fluctuation of power source input voltage, the capacity charge voltage can be stabilized at a fixed value; as the voltage at a capacity end is higher, the capacity energy density is improved, and the capacity use amount is greatly reduced; and a power off timing circuit is added, so that the power off maintaining time can be controlled, and the flexibility of design is improved.

The invention provides a wireless charging system suitable for low-power-consumption wireless sensor network node equipment, wherein the wireless charging system belongs to the technical field of wireless energy transmission. The wireless charging system comprises a transmitting-end device and a receiving-end device. The wireless charging system is characterized in that the transmitting-end device comprises an RF generating module (1), an RF transmitting power amplifying module (2) and a transmitting antenna (3). The receiving-end device comprises a receiving antenna (4), an RF-DC rectification boosting module (5), an energy storage module (6) and a power management module (7). The wireless charging system has advantages of convenient use, long receiving distance, high energy receiving efficiency, high safety, etc.

The invention discloses an electric vehicle extended range power supply system and a control method thereof and an extended range electric vehicle. A vehicle controller of the electric vehicle extended range power supply system controls the power supply state of a battery pack and a high-voltage direct current bus. An intelligent controller controls a variable speed clutch and a direct current motor so as to change a power source of an extended range generator, and the intelligent controller controls the connection state between the extended-range generator and the battery pack. A low-speed shaft of a speed increaser I is connected with an axle, a high speed shaft of the speed increaser I is connected with the input end of the variable speed clutch, and a rotor shaft of the extended-rangegenerator is connected with the output end of the variable speed clutch. An output shaft of the direct current motor is connected with the rotor shaft of the extended-range generator through a speed increaser II and a flywheel. The control method uses the electric vehicle extended range power supply system to provide power for the electric vehicle. The electric vehicle comprises the electric vehicle extended range power supply system. According to the electric vehicle extended range power supply system and the control method thereof and the extended range electric vehicle, two sets of power generation drive systems are controlled by the intelligent controller to charge the battery pack continuously, and the effects that the endurance range is increased and the difficulty of charging is solved.

A voltage compensation circuit of a self-adaptive load cable comprises the following steps: firstly, converting an error amplifier output voltage containing peak current limit information of a primaryside feedback flyback converter into a first intermediate voltage related to the output current of the primary side feedback flyback converter by using an operation module; carrying out level shift conversion on the first intermediate voltage to obtain a second intermediate voltage capable of adapting to a common-mode input range of a voltage-current conversion module, and then carrying out ripple elimination conversion on the second intermediate voltage to obtain a third intermediate voltage; and enabling the third intermediate voltage to pass through a voltage-current conversion module to obtain a corresponding current, generating a voltage drop on a fifth resistor to obtain a compensation voltage in direct proportion to the output current, and superposing the compensation voltage to areference voltage for loop adjustment of the system to obtain a new reference voltage compensated by a load cable for loop adjustment of the system. Therefore, the output voltage of the primary side feedback flyback converter can change adaptively along with the load current, and the stability of the actual charging voltage is ensured.

An electrophotographic photoreceptor including a charge generating layer and a charge transfer layer accumulated on a support member, the charge transfer layer including at least two layers of a support side layer and a surface side layer, wherein the support side layer contains A mol/cm³ of charge mol/cm³ of charge transfer material having a dipolar moment of not more than 0.75 and inorganic particles having a number average primary particle diameter of 3-150 nm, wherein A and B satisfies relations of (1) and (2),

9.0×10⁻⁴>A>3.0×10⁻⁴   (1)

8.0×10⁻⁴>B>2.0×10⁻⁵   (2)

The invention discloses a charging circuit with high-voltage fast charging. The charging circuit comprises a switch module, a step-down module and a feedback module. The feedback module comprises a first detection resistor connected to an input main circuit, a second detection resistor connected to an output main circuit, and a rechargeable battery charged by the output main circuit. Input ends ofa first signal acquisition circuit, a second signal acquisition circuit and a third signal acquisition circuit are connected in parallel between two ends of the first detection resistor, the second detection resistor and the rechargeable battery. Output ends of the first signal acquisition circuit, the second signal acquisition circuit and the third signal acquisition circuit transmits output information to a control circuit. The switch module is connected between the step-down module and the input main circuit, and the switching state of the switch module is controlled by the control circuit. The invention also discloses a charging method of the circuit. The charging circuit has the advantages of a simple structure, no need for an inductor, high charging efficiency and low heat generation.

A joint control method with variable ZVS angles for dynamic efficiency optimization in a WPC system for EVs under ZVS conditions, including: adjusting a phase-shift duty cycle of a secondary active rectifier to control a charging voltage and a charging current of EV's batteries through a charging voltage closed loop and a charging current closed loop, respectively; adjusting a power angle of the secondary active rectifier to control a ZVS angle of the secondary active rectifier through a secondary ZVS angle closed loop; adjusting a phase-shift duty cycle of a primary inverter to control a ZVS angle of the primary inverter through the primary ZVS angle closed loop; determining the current operating case of the WPC system and adjusting the ZVS angles of the primary inverter and the secondary active rectifier to automatically identify an optimal operating point with a maximum charging efficiency through the P&O method.

The invention relates to an output voltage stabilization circuit of a charger baby. The output voltage stabilization circuit comprises an USB output interface, wherein the USB output interface comprises a power output pin and a ground pin, a first voltage stabilization capacitor is arranged between the power output pin and the ground pin, a ground end is further coupled to an N channel enhancement field-effect transistor, a first voltage sharing resistor is connected in series between a gate of the N channel enhancement field-effect transistor and the ground end, a second voltage sharing resistor is further coupled between a drain of the N channel enhancement field-effect transistor and the ground end, a source of the N channel enhancement field-effect transistor is coupled to an oscillation circuit, and the oscillation circuit is further coupled to the ground end. The output voltage stabilization circuit has the advantages that a relatively good voltage stabilization effect can be achieved, an output voltage between the ground end and the ground pin is compensated, and a compensation mode is that a load is compensated by an output current of the enhancement N channel field-effect transistor; and during charging, the current is shunted to the ground end from the ground pin so as to achieve current equalization if the load fluctuates and the voltage of the drain does not change, and the charging voltage is ensured to be relatively stable.

The invention provides a stay wire type cell phone emergency charger. The stay wire type cell phone emergency charger is constituted by a permanent magnet generator, a stay wire wheel cap, stay wires, a pull ring, and a three-phase bridge type rectification module. A finger is used to hook the pull ring to carry out a pull and release motion, and then all of the stay wires on a stay wire wheel are unfolded under the inertia action of the permanent magnet generator, and then are coiled on the stay wire wheel from an opposite direction, and the above mentioned motion is repeated continuously, and at the same time, the three coils of the permanent magnet generator are used to cut a magnetic line of force to generate induction current. Alternating current generated by the three coils is rectified by the three-phase bridge type rectification module into single-phase direct current, which is charged in the battery of the cell phone. The stay wire type cell phone emergency charger is advantageous in that 1, by adopting a stay wire type method, the power generation of the generator is driven, and a gear mechanism is not required, and therefore a size is small, and portability is realized; 2, by adopting a three-phase bridge type rectification method, maximum value of voltage is increased to square root of three times of original alternating current amplitude, and a relative error between the voltage and the mean value of the maximum value and the minimum value is no more than 7.178%, and therefore stable cell phone charging voltage is acquired.

The invention discloses a simple and reliable electric vehicle extend range power supply system and extend range electric vehicle. A drive gear of the electric vehicle extend range power supply systemis coaxially and fixedly connected with a wheel axle of the electric vehicle, a driven gear is engaged with the drive gear, the driven gear is coaxially connected with an input shaft of a clutch, anoutput end of the clutch is connected with a low speed shaft of a speed increaser, a high speed shaft of the speed increaser is connected with a rotor shaft of a direct-current generator, a control end of a controller is electrically connected with the clutch to control connecting or disconnecting, and a power supply output terminal of the direct-current generator is electrically connected with astorage battery, or the power supply output terminal of the direct-current generator is electrically connected with the storage battery through the controller. The simple and reliable extend range electric vehicle comprises the simple and reliable electric vehicle extend range power supply system. According to the simple and reliable electric vehicle extend range power supply system and the extendrange electric vehicle, opening and closing of the clutch are controlled by the controller to convert the kinetic energy of wheels to direct current to directly charge the storage battery, and underthe condition of simplicity and reliability, the purpose of increasing endurance mileage with no pollution in an environmental protective mode is achieved.

The invention discloses a pulse current-limiting lithium-ion battery charging power supply based on a low-pass filter circuit, which is characterized in that it mainly consists of a control chip U2, a diode rectifier U1, a transformer T, a thermistor RT, and a polar capacitor C1. Resistor R1, a low-pass filter circuit, a thyristor voltage regulator circuit, a gain in-phase amplifier circuit connected in series between the low-pass filter circuit and the VDD pin of the control chip U2, respectively connected to the terminal of the same name and the control terminal of the inductance coil L4 on the secondary side of the transformer T It consists of a power adjustment circuit connected to the chip U2, and a pulse current limiting circuit connected in series between the power adjustment circuit and the control chip U2. The present invention can provide the 4.2V reference voltage required for charging the lithium-ion battery; at the same time, the present invention can charge the lithium-ion battery with a constant current to 4.2V and switch to constant voltage charging, so that the present invention can provide a stable voltage for the lithium-ion battery. The charging voltage and current can effectively prevent the lithium-ion battery from being overcharged.

The invention discloses a gain same-phase amplifying circuit based charging power supply for a lithium ion battery. The gain same-phase amplifying circuit based charging power supply is characterized by mainly consisting of a control chip U2, a diode rectifier U1, a transformer T, a thermistor RT, a polar capacitor C1, a resistor R1, a low-pass filtering circuit, a gain same-phase amplifying circuit, a thyristor voltage stabilizing circuit and a power regulator circuit, wherein the gain same-phase amplifying circuit is serially connected between the low-pass filtering circuit and a VDD pin of the control chip U2; the thyristor voltage stabilizing circuit is serially connected between the control chip U2 and a primary side of the transformer T; and the power regulator circuit is connected with a dotted terminal of a secondary-side inductance coil L4 of the transformer T and the control chip U2 respectively. The charging power supply can supply 4.2 V reference voltage required during charging for the lithium ion battery; meanwhile, constant current charging can be carried out on the lithium ion battery until the voltage is 4.2 V, and then constant voltage charging is carried out, so that stable charging voltage and current can be supplied for the lithium ion battery, and overcharging of the lithium ion battery is effectively prevented.

The invention discloses a rectification voltage regulator and a hybrid power vehicle using the same; the rectification voltage regulator comprises a rectifying circuit and an output control circuit; asampling voltage-stabilizing control circuit is further arranged between the rectifying control circuit and the output control circuit; the rectifying circuit is a three-phase bridge type half-control rectifying circuit; the sampling voltage-stabilizing control circuit is also provided with a feedback loop; and the feedback loop is connected to the control signal input end of a silicon controlledrectifier in the three-phase bridge type half-control rectifying circuit. The hybrid power vehicle further comprises a power generation device and a storage battery, wherein the input end of the rectification voltage regulator is connected with the three-phase output end of the power generation device, and the output end of the rectification voltage regulator is connected with the charging end ofthe storage battery. The rectification voltage regulator has the remarkable effects that the power conversion problem of the hybrid electric vehicle is successfully solved, and the charging characteristic of the storage battery is perfectly matched, so that the charging voltage of the storage battery is stabilized, and the safety of the circuit in the hybrid electric vehicle is ensured.

The invention discloses a charging power supply for a high steady-state lithium-ion battery, which is characterized in that a control chip U2, a diode rectifier U1, a transformer T, a thermistor RT, a polar capacitor C1, and a resistor R1 are connected in series to the diode The low-pass filter circuit between the positive output terminal of the rectifier U1 and the VDD pin of the control chip U2, the thyristor voltage stabilizing circuit connected in series between the control chip U2 and the primary side of the transformer T, and the inductance coil connected with the secondary side of the transformer T respectively The terminal of the same name of L4 is composed of a power adjustment circuit connected with the control chip U2. The present invention can provide the 4.2V reference voltage required for charging the lithium-ion battery; at the same time, the present invention can charge the lithium-ion battery with a constant current to 4.2V and switch to constant voltage charging, so that the present invention can provide a stable voltage for the lithium-ion battery. The charging voltage and current can effectively prevent the lithium-ion battery from being overcharged.

The invention discloses a constant-voltage charger circuit of communication equipment. The constant-voltage charger circuit comprises a resistor R1, a capacitor C1, a triode V1, a triode V2 and a triode V3, and one end of the resistor R1 is connected with one end of the capacitor C1 and one end of 220V alternating current, and the other end of the resistor R1 is connected with the other end of thecapacitor C1, the anode of a diode D1 and a TVS diode DW; and the other end of the TVS diode DW is connected with the anode of a diode D2, the cathode of a diode D4 and the other end of the 220V alternating current. The constant-voltage charger circuit of the communication equipment not only can automatically disconnect the circuit after the charging is completed, but also can effectively protectand stabilize the charging voltage in the charging process, and is provided with the charging warning lamp as a charging indication, so that the constant-voltage charger circuit of the communicationequipment is multifunctional and convenient to use.