289 results about "Thermal resistor" patented technology

The invention relates to the technical field of gas detection, in particular to a detection circuit based on an NTC thermistor and a heat conduction meter. The detection circuit based on the NTC thermistor comprises a main NTC thermistor which is suspended in air flow; the constant current source circuit is used for providing constant working current for the main NTC thermistor; the detection resistor is arranged between the main NTC thermistor and a ground node; the ADC sampling circuit is used for sampling analog voltages at two ends of the detection resistor into digital signals; the constant temperature adjusting circuit is used for controlling the magnitude of the current output by the constant current source circuit according to the voltage of the main NTC thermistor, so that the main NTC thermistor is kept at the target temperature; the temperature compensation circuit is used for detecting the temperature of the environment where the heat conduction measuring meter is located; and the processing unit is used for determining a detection result according to the digital signal and compensating the detection result according to the environment temperature. According to the detection circuit based on the NTC thermistor, the response speed and the measurement precision of measurement are improved.

A power tool includes a housing, an electric motor disposed within the housing, a first printed circuit board assembly configured to selectively supply electric current to the electric motor, causing the electric motor to activate and drive a tool element, and a battery receptacle configured to support a removable battery pack. The battery receptacle has a battery terminal block electrically connected to the battery pack to supply electrical current to the first printed circuit board assembly. The power tool further includes a second printed circuit board assembly electrically connected between the first printed circuit board assembly and the battery terminal block. The second printed circuit board assembly has a fuse and a thermistor configured to detect a temperature of the fuse.

The invention provides a three-phase low-voltage MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) packaging integrated power module. A driving assembly, a direct-current bus capacitor and other modules are integrated in an aluminum shell package. The three DBC substrates respectively bear U-phase bridge arms, V-phase bridge arms and W-phase bridge arms, an upper bridge arm and a lower bridge arm of each phase are formed by a plurality of parallel MOSFET chips, drain electrodes of the chips are directly welded to a DBC upper copper layer, grid electrodes of the chips are connected with an upper-layer driving circuit board through copper columns, source electrodes of the chips are led out to a direct-current input terminal or an alternating-current output terminal through bonding wires, and a double-layer conductive structure is formed. A plurality of direct-current bus capacitors which are arranged above the aluminum shell in parallel are adjacently coupled with the DBC substrate, so that low-impedance energy buffering is realized; the alternating current output terminal is sleeved on the current sensor, detects the phase current and outputs the phase current through the signal terminal; and a thermistor is mounted on a copper layer on each DBC to monitor the junction temperature of the chip and provide over-temperature protection. The direct-current input terminal, the alternating-current output terminal, the power terminal and the signal terminal are integrally embedded in the aluminum shell and are directly butted with an external busbar and a controller, and additional sampling and driving boards are not needed.

The thermosensitive crystal resonator comprises a base, a quartz wafer and a thermistor, the base comprises a base bottom plate, a base middle plate and a base wall which are sequentially arranged from bottom to top, an inner cavity is defined by the upper end face of the base middle plate and the inner wall of the base wall, an upper end opening of the inner cavity is sealed through an upper cover, and a lower end opening of the inner cavity is sealed through a lower cover. A center through hole is longitudinally formed in the middle of the upper end face of the base middle plate, a thermistor is installed in the center through hole, side edge through holes are formed in the positions, located on the two sides of the center through hole, of the upper end of the base middle plate respectively, embedded blocks are installed in the side edge through holes, a plurality of honeycomb holes are formed in the upper portions of the embedded blocks, and the honeycomb holes are filled with conductive buffer rubber. And the upper ends of the two embedded blocks are connected with a quartz wafer through conductive silver adhesive. By optimizing multiple designs of the base structure, the honeycomb buffer structure, the close-range thermosensitive compensation arrangement structure and the double-sealing structure, temperature compensation precision, stress buffer high efficiency and sealing performance long-term performance are achieved.

The invention provides a motor driver and a heat dissipation system thereof. The motor driver comprises a driving board, and the driving board is provided with a motor driving circuit, a temperature detection circuit, a power supply circuit and a main control chip. The power supply circuit is connected with the motor driving circuit and the main control chip and provides a working power supply; the motor driving circuit comprises a driving chip and MOS tubes, the input end of the driving chip is connected with the PWM output end of the main control chip, the output end of the driving chip is connected with the grid electrodes of the MOS tubes, and the drain electrode of the lower MOS tube and the source electrode of the upper MOS tube are connected into a motor three-phase driving loop; the temperature detection circuit comprises a thermistor which is arranged on the driving board and is connected in series with the fixed resistor to form a voltage division circuit, and a voltage division node is connected to an ADC interface of the main control chip; the main control chip collects voltage values at the two ends of the thermistor through the ADC interface and calculates a temperature value according to the collected voltage values; and when the temperature value exceeds a set threshold value, the main control chip stops outputting the PWM signal to the driving chip so that the motor stops rotating.

The invention relates to a novel semiconductor power device with a built-in gate resistor structure and a preparation method of the novel semiconductor power device. The active region of the semiconductor substrate is provided with a grid electrode electrolyte layer, the grid electrode electrolyte layer is provided with a polycrystalline silicon layer, the polycrystalline silicon layer is provided with first through holes, each first through hole is provided with a temperature coefficient thermistor, the temperature coefficient thermistors extend out of the first through holes, the polycrystalline silicon layer and the temperature coefficient thermistors are provided with interlayer dielectric layers, and the interlayer dielectric layers are arranged between the polycrystalline silicon layer and the temperature coefficient thermistors. The interlayer dielectric layer is provided with a second through hole and a third through hole, the second through hole is filled with a first metal layer, the third through hole is filled with a second metal layer, the interlayer dielectric layer is provided with a grid electrode bonding pad and a grid electrode flow channel, and the grid electrode bonding pad, the grid electrode flow channel and the interlayer dielectric layer are provided with passivation layers. The novel semiconductor power device with the built-in gate resistor structure is designed to solve the technical problem that an existing semiconductor power device with the built-in gate resistor structure is high in loss at a high temperature.

The invention relates to the technical field of automobile lamps, in particular to an automobile lamp function fault intelligent compensation circuit structure which comprises a microprocessor (1), an LED driver (2), a current limiting resistor (3), an LED lamp (4), a thermistor (5), an MOS tube (6) and a precise sampling resistor (7), and discloses an automobile lamp function fault intelligent compensation circuit control method which comprises state sensing, intelligent decision making and dynamic execution. The method is novel in conception, scientific in design and safe and reliable to use, and intelligently improves the driving power of the remaining normal LED lamps (4) after the fault of the LED lamps (4) is recognized by monitoring the branch states of the LEDs (4) in real time, so that the total light output is maintained to be close to the initial level, and the driving safety and the regulation conformity are guaranteed.

The invention relates to a liquid flow detection system based on a thin film thermistor, and the system comprises a pipeline which is used for conveying to-be-detected liquid; the sensor body is mounted on the pipe wall of the pipeline; the inductive probe is arranged at the bottom of the sensor body and extends into a flow channel of the pipeline, the inductive probe comprises a heating resistor serving as a heating element and a temperature measuring resistor serving as a temperature measuring element, and the temperature measuring resistor is located at the downstream of the heating resistor; and the signal processing circuit board is arranged inside or outside the sensor body, is electrically connected with the heating resistor and the temperature measuring resistor, and is used for collecting and processing temperature signals. According to the invention, the MEMS film thermistor is utilized, the thermal capacity is small, the response is fast, and the fault of a traditional thermal sensor is broken through; according to the method, the thermal saturation bottleneck of a small flow area with the flow rate of 1 [mu] L / min is overcome, and a delta T / delta t composite algorithm model is introduced, so that the linearity and the sensitivity of the low flow area are effectively expanded, and the flow measurement with the precision of nL / min to [mu] L / min is realized.

This invention provides a battery heating system and method for an electric vehicle superstructure, relating to the field of battery preheating technology. The system includes: an electric vehicle superstructure comprising a drive motor controller, a generator, a generator controller, a DC-DC converter, a low-voltage battery, a power battery, a hybrid controller, an integrated capacitor, a superstructure load, and a drive motor; the generator is connected to the vehicle chassis engine; the power battery has a built-in battery distribution module; the battery management unit includes a positive contactor, an integrated capacitor, a negative contactor, and a charge / discharge current meter connected in series, wherein a resistor R1 and a pre-charge contactor are connected in parallel to the positive contactor, and the drive motor controller and the generator controller are connected in parallel to the integrated capacitor; the battery management unit also includes a heating contactor, a heating current meter, and a PTC thermistor pair connected in series, wherein the heating contactor is connected to the positive terminal of the power battery, and the PTC thermistor pair is connected to the negative contactor.

The invention provides a temperature measurement circuit, and belongs to the technical field of detection, the temperature measurement circuit comprises a first voltage division measurement circuit and a second voltage division measurement circuit, the output end of the first voltage division measurement circuit is connected to the input end of a first amplification circuit; the output end of the second partial pressure measuring circuit is connected to the input end of the second amplifying circuit; the output end of the first amplification circuit and the output end of the second amplification circuit are respectively connected to two channels of the AD sampling chip, and the output end of the AD sampling chip is connected to the signal processor; the signal processor is used for acquiring a first voltage output by the first amplifying circuit and a second voltage output by the second amplifying circuit; determining the resistance value of the thermistor at the current moment based on the voltage difference between the first voltage and the second voltage and the theoretical partial voltage value of the second resistor; and determining the temperature at the current moment based on the resistance value of the thermistor at the current moment. According to the temperature measurement circuit provided by the invention, the measurement precision of the temperature measurement circuit can be improved.

The invention relates to a lithium battery module temperature estimation method based on a multi-state electrothermal coupling model, and relates to the technical field of lithium battery temperature state estimation. Constructing a multi-state electrothermal coupling model of the single battery, wherein the multi-state electrothermal coupling model comprises an RC second-order equivalent circuit model and a multi-state equivalent thermal network thermal model; constructing a hierarchical integrated multi-state electrothermal coupling model of the battery module by connecting each single electric model in series and additionally arranging a conductive thermal resistor between each single electric model to describe heat exchange between adjacent batteries; performing parameter identification on the integrated model by adopting an improved overall cluster optimization algorithm; and based on the model after parameter identification, combining an adaptive unscented Kalman filter which dynamically adjusts noise covariance by adopting an exponential weighted moving average algorithm, and carrying out real-time estimation on the internal and surface temperature states of the battery module. According to the method, the temperature estimation precision and the long-term operation robustness of the battery module under the complex working condition are remarkably improved through the steps.

A support for a conductor in an electric machine, including a body receivable in a stator of the electric machine between adjacent coils, the body defining an axis, a conductor anchor extending from the body at an angle to the axis, the conductor anchor having at least two conductor contact points, the angle of the anchor causing bending of the conductor at at least two contact points when the conductor is disposed in the anchor and the body is disposed in the stator. A stator having a coil thereon, a conductor separate from the coil, and a support disposed in the stator and in supportive contact with the conductor. A method for supporting a conductor at a stator of an electric machine, including disposing the support in contact with the conductor, rotating the support to introduce plastic deformations in the conductor, and inserting the body into the stator.

The utility model relates to the technical field of electronic component production, in particular to a thermal sensitive ceramic resistor precision forming device, which comprises a positioning mechanism capable of positioning a thermistor and cutting a terminal. According to the utility model, the moving seat is driven to slide on the two limiting columns, and the second air cylinder is extended to drive the lifting plate to descend, so that the positioning seat is driven to descend, and therefore, two terminals of a resistor can be pressed between the two clamping grooves between the positioning seat and the moving seat, and the resistor terminals can be subjected to secondary positioning; through positioning in two steps, shaking can be prevented during cutting, a lifting plate continues to descend to drive a sliding column to be inserted into a positioning seat, the positioning seat continues to press a terminal through a reset spring, and meanwhile, the lifting plate can drive a cutting blade to cut the excessive part of the terminal, so that the cutting efficiency is improved. And metal generated by cutting is received and recycled through the recycling box, and deformation of the cutting position of the terminal can be avoided in a dual-positioning mode.

The utility model relates to electrical engineering and can be used to protect electromagnetic voltage transformers from ferroresonant oscillations occurring in voltage transformers in distribution networks with a voltage class of 6-10 kV, alternating current with a frequency of 50 Hz with an isolated neutral.In a device for protecting voltage transformers from ferroresonance phenomena, designed with the possibility of connecting to two terminals of auxiliary secondary windings of three single-phase transformers connected in an open-delta circuit, containing a series-connected RTS thermistor, a damping resistor and an electronic switching circuit with a threshold switching characteristic, which includes a switching element in the form of a triac, the control electrode of which is connected to a control circuit including a dinistor, two resistors and a capacitor, the control electrode of the triac is connected to the control circuit through a normally closed controlled key, the RTS thermistor is equipped with a temperature sensor connected to the controlled key, and the dinistor is selected to be symmetrical.Technical result: increasing the effective operating time of a device for protecting voltage transformers from ferroresonance phenomena in the presence of modes in the network accompanied by prolonged exposure to single-phase short circuits to ground by ensuring restoration of the original operating mode. 2 fig.

The utility model relates to a temperature measuring probe, which comprises an insulating cylindrical tube, a heat conducting aluminum cover and a thermistor, the heat conducting aluminum cover is sleeved at the top end of the insulating cylindrical tube and seals the upper port of the insulating cylindrical tube, and the thermistor is arranged in the insulating cylindrical tube and is attached to or abutted against the cover surface of the heat conducting aluminum cover. Two cables of the thermistor are led out from the lower port of the insulating cylindrical tube to the outer side, the upper part of the insulating cylindrical tube is provided with a plurality of filler grooves communicated with a tube cavity of the insulating cylindrical tube, and epoxy resin is encapsulated in the plurality of filler grooves and the tube cavity; according to the temperature measuring probe, the filling groove is additionally formed in the insulating cylindrical tube, epoxy resin is filled in a tube cavity more fully, the meshing force between the insulating cylindrical tube and the heat conduction aluminum cover can be improved, connection is firmer, the hardened epoxy resin can be used for hanging the whole epoxy resin through the part filled in the filling groove, and the whole epoxy resin is not damaged. The problem that epoxy resin falls down along the smooth pipe wall of the insulating cylindrical pipe in the heating process is solved.

The utility model provides an oil-resistant high-precision embedded thermal resistor, which belongs to the technical field of embedded thermal resistors, and comprises a reference end and a measuring end, the measuring end comprises a pipe sleeve head and two resistor elements arranged in the pipe sleeve head, the upper part of the pipe sleeve head is welded with an armored lead wire through laser, and the armored lead wire is connected with the reference end and the measuring end. The armored lead is sleeved with a silica gel heat shrink tube or a polytetrafluoroethylene tube, and a shielding lead is arranged between the armored lead and the reference end. According to the embedded thermal resistor, double resistor elements are adopted, so that the redundancy of a product is increased, cross validation can be realized, the measurement error is reduced, meanwhile, the lead directly connected with the measurement end is an armored lead, and a silica gel heat shrink tube or a polytetrafluoroethylene tube is sleeved on the lead, so that the oil resistance of the embedded thermal resistor is greatly improved, and the service life of the embedded thermal resistor is prolonged. In addition, environmental interference can be inhibited, thermal stability can be maintained, the service life can be prolonged, and the effective precision under actual working conditions is remarkably improved, especially in high-electromagnetic-interference, severe-temperature-change or corrosive environments.

The utility model discloses a regulating circuit for controlling ceiling fan headlights based on a resistor, which comprises a thermistor RT1, an inductor L1, a safety capacitor CX2, a silicon controlled rectifier Q2, a voltage-regulator tube D3 and a capacitor-resistor assembly, one end of the thermistor RT1 is connected with an LC end, and the other end of the thermistor RT1 is respectively connected with one end of the safety capacitor CX2 and a first port of the silicon controlled rectifier Q2; the other end of the safety capacitor CX2 is respectively connected with one end of the inductor L1 and a lamp interface, a second port of the silicon controlled rectifier Q2 is connected with the other end of the inductor L1, a third port of the silicon controlled rectifier Q2 is connected with the capacitance-resistance assembly through a voltage-regulator tube D3, and the capacitance-resistance assembly is connected with an adjustable resistor VR1. According to the design, the development difficulty of software can be reduced, and the brightness adjustment of the ceiling fan headlamp is simplified through a circuit on hardware. The resistor is used for controlling the brightness of the ceiling lamp, power limiting measures are taken on hardware, the troublesome and tedious adjustment process of software can be avoided, and adjustment is accurate. And an economic development scheme is adopted, and the development period of adjustment is shortened.

The utility model relates to the technical field of lithium batteries, and discloses a PTC (Positive Temperature Coefficient) heating film, a heating assembly and a battery module, the PTC heating film comprises a base layer; the PTC thermistor layer is arranged on the base layer, the base layer supports the PTC thermistor layer, and the PTC thermistor layer emits heat to heat the battery; the covering layer is arranged on the side, away from the base layer, of the PTC thermistor layer, and the covering layer prevents water and impurities from entering the PTC thermistor layer; the thickness of the PTC heating film ranges from 1.5 mm to 3.5 mm. The heating assembly comprises the PTC heating film according to any one of claims 1-5, and the PTC heating film is electrically connected with a temperature control module used for controlling the temperature of the PTC heating film. The battery module disclosed by the utility model comprises the battery and the heating assembly, the PTC heating film is coated on the battery, and the battery module disclosed by the utility model has the technical effects of uniform heating and self temperature control in the heating process, so that the risk of thermal runaway such as local overheating in the battery heating process is reduced.

The invention discloses a hardware temperature compensation pressure sensing module based on an LTCC embedded structure and a preparation method, and relates to the technical field of sensors. The module comprises an LTCC substrate body, an embedded main control unit, a surface sensing unit and an embedded hardware temperature compensation network, a closed embedded cavity is formed in the LTCC substrate, a vertical interconnection conductor is arranged in the LTCC substrate, the main control unit is embedded in the cavity, and the surface sensing unit outputs differential signals containing temperature excursion; the embedded thermistor and the partial pressure filter form a temperature reference signal, and the compensation resistor is used for zero calibration; the rear-stage signal conditioning circuit amplifies the differential signal, superimposes the pressure signal and the temperature reference signal in an analog domain according to a weighting proportion and performs low-pass filtering, and outputs the pressure signal and the temperature reference signal to a master control analog-to-digital conversion end after realizing temperature drift offset; embedded interconnection and hardware temperature compensation are achieved, temperature drift is restrained, heat dissipation shielding is enhanced, and the sampling utilization rate and mass production consistency are improved.

The utility model relates to the technical field of chip braiding, and discloses thermistor chip braiding equipment which comprises a carrier tape, a plurality of resistors to be tested are arranged on the upper side of the carrier tape, first bases are arranged on the front side and the rear side of the middle of the carrier tape respectively, and a controller is fixedly connected to the top of each first base. A first camera is arranged on the side, close to the carrier tape, of the controller, a shifting piece is arranged on the outer wall of a fixing column, a second camera is arranged on the upper side of the front side of a third base, a second air cylinder is arranged on the top of a fourth base, a first air cylinder is fixedly arranged at the output end of the second air cylinder, and a second support is fixedly arranged at the output end of the first air cylinder. According to the utility model, signals are transmitted to the controller through the camera I and the camera II, and the controller identifies and judges the appearance of the resistor, makes contact with the pins of the resistor, and measures the resistor, so that the braid thermistor chip is detected, and defective products are prevented from flowing out.

The invention provides temperature measurement equipment, and relates to the technical field of temperature measurement. The temperature measuring device comprises: a digital-to-analog converter for outputting a reference voltage; the bridge circuit comprises a reference bridge arm and a measurement bridge arm, the reference bridge arm is connected with the digital-to-analog converter, the measurement bridge arm comprises a first resistor and a thermistor, and the first resistor is connected with the thermistor in series; the first input end of the amplifying circuit is connected with the reference bridge arm and used for accessing the reference voltage of the digital-to-analog converter, and the second input end of the amplifying circuit is connected with the midpoint of the measuring bridge arm; and the analog-to-digital converter is used for collecting the output voltage of the amplifying circuit so as to determine the measured temperature according to the output voltage. The temperature measurement equipment provided by the invention is suitable for scenes which have high requirements on temperature measurement precision and need to dynamically adapt to different temperature measurement ranges.

The invention provides a TEC controller chip test system and method, the system employs an integrated circuit automatic test machine ATE to test a TEC controller chip, the ATE comprises a voltage or current source, a high precision measurement unit, a power resistor and an arbitrary waveform generator, the voltage or current source is used as a power supply, the high precision measurement unit is used as a test instrument, and the power resistor is used as an arbitrary waveform generator. The power resistor is used for simulating the TEC, and the arbitrary waveform generator is used for simulating the voltage of the thermistor. According to the invention, the technical problems of high cost, low efficiency and low system reliability of the test of the TEC controller chip in the prior art can be solved.

A device for measuring a temperature at one or more locations in an organ or tissue inside the human or animal body, a related kit and a related method. The device includes a catheter tube having a distal end for inserting into the body and a proximal end for remaining outside the body in use of the device, and at least one resistive temperature sensor in the tube, and a plurality of electrical wires in the tube that are connected to the at least one resistive temperature sensor. The plurality of electrical wires includes at least some electrical wires running from the proximal end of the tube through the tube. The device includes a connector at the proximal end of the tube for electrically connecting the plurality of electrical wires to an external device. The resistive temperature sensor includes a thermal resistor and a first terminal and a second terminal.

The utility model discloses a PTC water heater with a novel structure and high power density, and belongs to the field of heaters. Comprising a PTC heating core, an aluminum casting, a water pipeline and a wire harness, the PTC heating core comprises a PTC sheet, an electrode sheet and an insulation protection layer, and a pin is arranged at the end of the electrode sheet; the aluminum casting comprises an upper aluminum part, a second aluminum part, a third aluminum part and a lower aluminum part, the second aluminum part and the third aluminum part are used for fixing the PTC heating core, the water passing pipeline is an integrated continuous U-shaped pipe, and two ports of the water passing pipeline are blunt; the water passing pipeline is installed outside the second aluminum piece and the third aluminum piece and fixed through the upper aluminum piece and the lower aluminum piece. According to the utility model, the whole structure is simple, the size is small, the maximum power density of 60W / cm < 2 > (PTC thermistor area) can be realized, and the size, the weight and the cost of the heater are effectively reduced.

This utility model discloses an inverted soldering device for thermistor chips, relating to the field of thermistor chip manufacturing technology. It includes a feeding mechanism and a chip with leads mounted on the feeding mechanism. The leads of the chip are vertically upward. Two sets of soldering structures are symmetrically arranged on both sides of the feeding mechanism's conveying direction. Each soldering structure includes a hot solder box, inside which a hollow solder tube is fixedly installed. A solder outlet tube is located on the side of the solder tube closest to the feeding mechanism, with its outlet aligned with the chip with leads. A fixing plate is located inside the hot solder box, and a first motor is mounted on the fixing plate. The output shaft of the first motor is connected to a small auger, which is located inside the solder tube. This inverted soldering device for thermistor chips facilitates soldering by placing the chip with leads on the side of the feeding mechanism with its leads vertically upward. The two sets of soldering structures achieve double-sided soldering and make the connection between the resistor and its leads more stable.

The invention relates to a metal eutectic bonding MEMS pressure sensor and a preparation method thereof, and belongs to the technical field of micro electro mechanical systems. The invention provides a metal eutectic bonding MEMS pressure sensor and a preparation method thereof. The sensor comprises a base, a lower bonding film, an upper bonding film, a substrate, an insulating film, a resistor strip and a thermistor film. The substrate, the insulating film, the resistor strip and the thermistor film form a core body; the silicon substrate manufactured through the MEMS technology is used as a core body, and the problem that the MEMS technology cannot be used for a metal elastomer in a traditional sputtering film type pressure sensor is solved. Aiming at the problems of an existing MEMS pressure sensor during assembly and system integration, low-stress connection between a core body and a metal base is realized by adopting a metal eutectic bonding technology, additional stress caused by difference of thermal expansion coefficients is effectively relieved, and by utilizing the characteristics of high strength and high stability of a metal eutectic bonding structure, the MEMS pressure sensor can be assembled and integrated with a system. The technical problem that the chip is easily damaged due to stress concentration in a gluing / welding mode is solved.

The application discloses a thermal type wind speed and direction sensor based on thermistors and thermoelectric piles and a working method thereof. The sensor structure comprises a thermistor, a thermoelectric pile, a heating resistor, a silicon substrate and a measurement and control IC. The heating resistor is square and located at the center of the substrate. Four thermistors and a thermoelectric pile parallel to the side edges of the heating resistor are distributed on the four sides of the heating resistor. The four parallel thermistors are connected to form a Wheatstone full-bridge temperature measurement structure, and the two parallel thermoelectric piles are connected to form a thermoelectric pile temperature measurement structure. The measurement and control IC is distributed at the four corners of the substrate and connected to the temperature measurement structure formed by the heating resistor, the thermoelectric pile and the thermistor, and is used for driving the detection structure and processing the output signal thereof. The application adopts a CMOS process, and the thermistor and the thermoelectric pile structure are redundant to each other, so that the wind speed and direction detection precision can be improved.

The invention provides a temperature protection control circuit and a new energy lithium ion battery, the circuit comprises a high temperature detection circuit, a discharging high temperature protection circuit and a charging high temperature protection circuit, the high temperature detection circuit comprises a thermistor and a high temperature detection protection chip, and the discharging high temperature protection circuit comprises a first switch tube, a first resistor and a discharging circuit. The charging high-temperature protection circuit comprises a third switch tube, a third resistor and a charging circuit. The circuit adopts the thermistor and the high-temperature detection protection chip to jointly detect the temperature condition of the battery during charging and discharging, and the thermistor is arranged adjacent to the charging and discharging MOS tube, so that the temperature parameter of the thermistor is detected by the high-temperature detection protection chip, and whether the low level is output or not is output according to the current temperature parameter, thereby achieving an effective charging high-temperature protection effect; according to the scheme, the reliability is high, and the thermistor can be connected with other resistors in series to adjust the temperature threshold value, so that the charging and discharging high-temperature protection threshold value can be flexibly adjusted.

This application relates to the field of thermistor technology, specifically disclosing an NTC thermistor material, a chip resistor, and its preparation method and application. The NTC thermistor material provided in this application comprises a base material and 3-13% additives by weight; the base material comprises Mn3O4, Co3O4, Al2O3, Fe2O3, and ZnO in a weight ratio of (10-40):(10-50):(1-15):(10-25):(5-19); the additives comprise MgAl2O4, Nb2O5, and TiO2 in a weight ratio of (1-200):(1-10):(5-25); this application also provides a chip resistor made using the NTC thermistor material. The NTC thermistor material provided in this application has a high material constant B value and a low room temperature resistivity ρ. 25 It can meet the application requirements of high-precision and high-reliability temperature sensors.

The utility model relates to the technical field of resistors, in particular to a feeding device for thermistors, which comprises a support base, a support frame, a storage support seat, a resistor screening mechanism and a resistor discharging mechanism, the resistor screening mechanism is arranged and comprises the vibration disc, the spiral track and the screening baffle, when the resistor passes through the screening baffle on the spiral track, due to the fact that the screening notch matched with the thermistor in size is formed in the bottom of the screening baffle, the resistor which does not conform to the specification is blocked by the screening notch, and the passing resistor conforms to the specification of the current batch; resistors meeting the specification are automatically screened to pass through, the passing resistors enter the next production line through the resistor discharging mechanism, automatic resistor screening is achieved, manual screening is replaced, the screening efficiency is improved while the labor cost is reduced, and use is convenient.