11results about How to "Lower average current" patented technology

The present invention belongs to the technical field of battery production and manufacturing, and specifically relates to a battery top cover assembly structure, including a negative electrode column, a positive electrode column and a top cover sheet, the top cover sheet is provided with a first through hole and a second through hole, the negative electrode column is assembled in the first through hole, the positive electrode column is assembled in the second through hole, the side of the negative electrode column is coated with a first insulating plastic, the space between the positive electrode column and the second through hole is coated with a conductive plastic, and the outer surface of the conductive plastic is coated with a second insulating plastic for preventing the conductive plastic from generating stress due to secondary crystallization. The present invention can solve the problem of stress generated by secondary crystallization of conductive plastic, causing plastic warping and cracking, and is conducive to improving the sealing performance of the electrode column, thereby improving the safety of the battery cell. In addition, the present invention also discloses a battery top cover assembly method.

The application provides a method for sending a data packet based on a Wi-Fi switch circuit. The Wi-Fi switch circuit comprises a power module, a switch module and an output module. The power module comprises a button cell and a front-stage capacitor. The switch module comprises a key switch. The output module comprises a Wi-Fi chip. The method for sending a data packet comprises the following steps: in response to pressing the key switch, the Wi-Fi switch circuit is instantaneously turned on, the Wi-Fi chip is triggered to enter an initialization state, it is determined whether the Wi-Fi chip has been bound to a receiving end device, the Wi-Fi chip sends a data packet, and the front-stage capacitor supplies power to the Wi-Fi chip when the Wi-Fi chip sends the data packet. After the Wi-Fi chip sends the data packet each time, the Wi-Fi chip enters a sleep state. During the sleep state, the button cell charges the front-stage capacitor, so that the front-stage capacitor stores electric energy. After a predetermined time length arrives, the Wi-Fi chip enters a working state again.

The utility model provides a starting auxiliary source circuit of a photovoltaic inverter, a power supply circuit and the photovoltaic inverter. The starting auxiliary source circuit of the photovoltaic inverter comprises a half-wave rectification unit, a full-wave rectification unit and a first one-way conduction unit. An alternating current input end of the full-wave rectification unit is connected with an alternating current source of the starting auxiliary source circuit through the half-wave rectification unit; the direct current output end of the full-wave rectification unit is connected with a direct current bus of the photovoltaic inverter through the first one-way conduction unit; the direct-current output end of the full-wave rectification unit outputs first power supply voltage to the direct-current bus, and the voltage of the direct-current bus serves as starting voltage of the photovoltaic inverter.

The invention relates to a drive control circuit and method for a steam turbine speed regulator. The drive control circuit comprises a direct-current power supply input unit and at least one drive branch. The direct-current power input unit comprises a live wire and a zero wire; the number of the driving branches is equal to that of the OPC electromagnetic valves, each driving branch comprises an intermediate relay K1 and a contactor KM1, one end of a coil of the intermediate relay K1 is electrically connected with the live wire, the other end of the coil of the intermediate relay K1 is electrically connected with the zero line, one end of a normally open contact of the intermediate relay K1 is electrically connected with the live wire, and the other end of the normally open contact of the intermediate relay K1 is electrically connected with the zero line. One end of a coil of the contactor KM1 is electrically connected with the other end of the normally open contact of the intermediate relay K1, and the other end of the coil of the contactor KM1 is electrically connected with the zero line. The contactor is driven by the intermediate relay, the intermediate relay K1 serves as a control stage, the coil power consumption is small, direct and safe driving can be achieved through a passive dry contact signal of a steam turbine speed regulator, and the problem that a large-current load impacts a precision controller is solved.

The invention relates to a motor starting control method and device of an oral irrigator, a storage medium and a program product, a motor comprises a stator formed by a permanent magnet, a rotor formed by a coil winding, an electric brush, a positive terminal and a negative terminal, the positive terminal and the negative terminal are connected with two electrodes of a direct current power supply to form a closed loop, and an Mcu and a driving MOS are arranged on the closed loop. The Mcu controls and drives the MOS to output a PWM signal. The method comprises the following steps: giving an initial value a to the duty ratio of the PWM signal; an increment b is added to the duty ratio and lasts for a period of time t; and judging whether the duty ratio reaches a threshold value m, if so, maintaining the duty ratio output, and if not, returning to the previous step. The program product is stored on the storage medium and configured on the oral irrigator, so that the phenomenon of coil burning and smoking can be avoided by implementing the method, and the potential safety hazard of a fire hazard is eliminated.

The invention discloses a semiconductor chip capable of reducing low-clamping transient voltage, which relates to the technical field of semiconductor chips and comprises back metal, a substrate layer is arranged at the upper end of the back metal, a first P + isolation region and a second P + isolation region are arranged on two sides of the upper end of the substrate layer respectively, and an epitaxial layer is arranged in the middle of the upper end of the substrate layer. The two ends of the epitaxial layer are communicated with the first P + isolation region and the second P + isolation region respectively, a first doping region, a third P + isolation region, a second doping region, a third doping region and a fourth doping region are arranged in the epitaxial layer, and a first heat dissipation layer and a second heat dissipation layer are arranged in the epitaxial layer. According to the semiconductor chip capable of reducing the low-clamping transient voltage, the electromagnetic intensity is slowed down in time, so that the transient response speed of a transient voltage suppressor is increased, the semiconductor chip can perform continuous heat dissipation through heat dissipation coatings with different densities, and the current control accuracy of the semiconductor chip is improved.

The embodiment of the present application provides a hybrid voltage conversion circuit and a hybrid voltage converter. The hybrid voltage conversion circuit comprises a hybrid branch and at least one capacitor branch; the hybrid branch comprises an inductor, a first capacitor and a first switch component, each capacitor branch comprises a second switch component and a second capacitor, the switch components comprise the first switch component and all the second switch components; the switch components are used for controlling the connection relationship between the first capacitor and each second capacitor; the hybrid voltage conversion circuit is used for raising the voltage at a first end of the hybrid voltage conversion circuit to different voltages or lowering the voltage at a second end of the hybrid voltage conversion circuit to different voltages based on different connection relationships between the first capacitor and each second capacitor. The voltage conversion ratio of the hybrid voltage conversion circuit has adjustability, and meanwhile the conversion efficiency of the circuit can be improved.

The invention discloses a method for controlling charging current of a power battery in a fast charging process. The method comprises the following steps: acquiring the optimal charging current Imap of the battery according to the state of a battery pack before charging; after charging is started, acquiring a current Ir requested from the charging pile and a real-time charging current Ic of the battery according to the current Imap; calculating the current charging difference current Id of the battery pack, wherein Id = Image-Ic; and controlling and adjusting the output current Ir of the charging pile according to the current Id until the charging is finished. The method has the advantages that the charging time is reduced by adjusting and controlling the charging current, the charging speed is increased, the charging safety is improved, and the current is reduced or avoided from being too large.

The invention discloses a medium-high frequency induction heating furnace with a combined heat preservation structure, which comprises a furnace shell, a graphite crucible arranged in the furnace shell, a heat preservation layer arranged on the outer side of the graphite crucible, and an induction heating coil arranged between the heat preservation layer and the furnace shell, a high-temperature porcelain pad is arranged between every two adjacent heat preservation cylinders. The heat preservation layer comprises at least two layers of heat preservation cylinders which are concentrically arranged, the sectional area of the single-layer heat preservation cylinder is reduced, the magnetic flux of the single heat preservation layer is reduced, and therefore induced current generated by the heat preservation cylinders is greatly reduced, and the risk of spontaneous heating of the heat preservation layer is reduced. The high-temperature porcelain pad is arranged between the two adjacent heat preservation cylinders, so that the two adjacent layers of heat preservation cylinders are insulated, and large current is prevented from being generated in the heat preservation cylinders.

The invention discloses an improved hiiccup mode short-circuit protection circuit for a BOOT converter, and relates to the technical field of switching power supplies, and the improved hiiccup mode short-circuit protection circuit is composed of a POWERSEL (power supply selection) module, a one-shot (single state) circuit, a PRECHARGE (pre-charging) module, a 1: 16 divider (sixteen frequency divider), a comp (comparator), a capacitor C1 and a discharge tube M1. According to the improved hiiccup mode short-circuit protection circuit for the BOOT converter, the pre-charging module is adopted to charge the load capacitor during each detection, the inductive current is limited, if a short circuit is removed, the load capacitor can be smoothly charged, and if the short circuit is not removed, next detection is waited, so that the problem of large current during detection is solved, overboot during restarting is eliminated, and the detection efficiency is improved. In the short-circuit period, a sleep mode and a detection mode are introduced, the short-circuit state is intermittently tested, at the moment, the converter works in a low-frequency clock, most modules are closed, only a few devices work, and therefore power consumption in the short-circuit period can be greatly reduced.

The invention discloses an electric braking method for an elevator, which is applied to an elevator control system and comprises the following specific steps: step 410, when electric braking is required; 420, the elevator enters closed-loop control; 430, according to the running direction of the elevator, the forward torque instruction or the torque current instruction Iqcmd is limited to be 0; the absolute value of the reverse torque instruction or the torque current instruction Iqcmd is limited to be smaller than or equal to the threshold value A, so that the frequency converter outputs negative power. Electric braking can be achieved without an independent switch, and electric braking can be achieved purely through the frequency converter. Therefore, the cost and the space are saved. In addition, if the number of components is reduced, the overall reliability of the system is also improved. The problems of overspeed caused by insufficient torque of low-speed and high-speed star sealing braking, large current during high-speed sudden stop star sealing and thermal risk caused by too long star sealing braking time due to too low speed after the star sealing braking is stable can be solved.