49 results about "Charge and discharge" patented technology

Positive electrode active materials are described that have a very high specific discharge capacity upon cycling at room temperature and at a moderate discharge rate. Some materials of interest have the formula Li_1+xNi_αMn_βCO_γO₂, where x ranges from about 0.05 to about 0.25, α ranges from about 0.1 to about 0.4, β ranges from about 0.4 to about 0.65, and γ ranges from about 0.05 to about 0.3. The materials can be coated with a metal fluoride to improve the performance of the materials especially upon cycling. Also, the coated materials can exhibit a very significant decrease in the irreversible capacity lose upon the first charge and discharge of the cell. Methods for producing these materials include, for example, a co-precipitation approach involving metal hydroxides and sol-gel approaches.

A phase shift and duty cycle correction circuit is disclosed herein as comprising a programmable digital to analog converter (DAC), a storage device (e.g., a capacitor), a charge sub-circuit and dump sub-circuit for charging and discharging the storage device, respectively, a comparator, and a clock driver circuit. A linearly increasing (or ramped) voltage waveform is generated within the storage device by the charging and discharging actions of the charge and dump sub-circuits; a periodic process which is controlled by opposite phases of the input clock. By programming the DAC control input to change the slicing threshold of the ramped waveform, the circuit and method described herein provides a means for programmable phase shifting and duty cycle correction.

The invention relates to an SOC and SOT combined state estimation method based on a power battery electric-thermal coupling model, and belongs to the technical field of battery management. The methodcomprises the steps of selecting a to-be-measured power battery, building the electric-thermal model of the power battery, and determining parameters needed for estimating the SOC and the SOT of the power battery; under different temperatures, conducting trickling charging-discharging experiments and HPPC experiments on the measured power battery, building a database of equivalent circuit model parameters relevant to the temperature and the SOC under a charging and discharging condition, and simulating field test working conditions under different road conditions to build the database; conducting parameter identification to obtain characteristic parameters of the electric-thermal model, and obtaining the quantitative relation between the equivalent circuit model parameters and the temperature and the SOC under the charging and discharging condition. By means of the SOC and SOT combined state estimation method based on the power battery electric-thermal coupling model, the model is combined with a PF algorithm and the quantitative relation of the equivalent circuit model parameters relevant to the temperature and the SOC under the charging and discharging condition of the power battery to achieve the SOC and SOT combined state estimation of the power battery.

A semiconductor integrated circuit having a built-in PLL circuit which has two charge pump circuits for charging and discharging capacitive elements of a loop filter in response to signals generated by a phase comparator circuit. One of the two charge pump circuits has current sources which generate current values smaller than those generated by current sources of the other charge pump circuit. The loop filter has a first capacitive element connected to a charge/discharge node, and a second capacitive element connected to the charge/discharge node through a resistive element. The first capacitive element is charged and discharged by the one charge pump circuit, while the second capacitive element is charged and discharged by the other charge pump circuit. A charging current source of the one charge pump circuit operates simultaneously with a discharging current source of the other charge pump circuit, i.e., the charge pump circuits operate in opposite phase.

The invention discloses an alumina coating method of a lithium ion battery positive electrode material. The method comprises the following steps: adding ammonia water to a positive electrode material suspended aluminum nitrate solution in a dropwise manner to form a precipitate coated by Al(OH)3, and heating the precipitate in an air atmosphere muffle furnace to form an alumina coated positive electrode material. The coating method can improve the charge and discharge capacity of the lithium ion battery and prolong the cycle life.

The invention discloses a storage battery detector and a vehicle-mounted network system for an intelligent automobile. The storage battery detector of the intelligent automobile comprises an input terminal, a current sensor, a temperature sensor, a charging and discharging current detection circuit, a voltage detection circuit, a temperature detection circuit, a microprocessor and a bus communication module, wherein the input terminal is partitioned into two paths; one path is connected with the current sensor; the current sensor is connected with the charging and discharging current detection circuit; the other path is connected with the voltage detection circuit; the temperature sensor is connected with the temperature detection circuit; the charging and discharging current detection circuit, the voltage detection circuit and the temperature detection circuit are connected with the microprocessor; and the microprocessor is connected with the bus communication module. The storage battery detector for the intelligent automobile is used for monitoring the insufficient voltage status of a storage battery, the charging status health condition and the like, and can be connected to the vehicle-mounted network system for protecting the insufficient voltage status of the storage battery, so that the service life of the storage battery is prolonged.

The present invention relates to a battery module, which includes one or more battery cell units, and the battery cell unit includes a battery cell, a fixing member located surrounding an outer circumference surface of the battery cell, and a heat absorbing material located between the battery cell and the fixing member, and as a result, heat generation inside the battery module is suppressed, and ignition between the series-connected battery cell units may be suppressed. Accordingly, excellent charge and discharge efficiency, an excellent cycle property and a lifespan property of the battery may be exhibited without concern for explosion or ignition of the battery module.

Provided is an auto-thermal evaporative liquid-phase synthesis method for cathode material for battery, comprising the following steps: (1) Adding a synthetic raw material of cathode material into a solvent to obtain a mixture A, the synthetic raw material of the cathode material containing lithium source, adding an accelerant into the mixture A, which makes the mixture A achieve a strong auto-thermal reaction to release heat to evaporate the solvent, and obtaining a solid precursor of the cathode material; (2) Drying the precursor, sintering in an atmosphere furnace and obtaining the cathode material. The method is simple in process, low in energy consumption, requirements for equipment and cost, and is applicable to industrial mass production and application. The cathode material obtained through the method is stability in batch, easy to process, low in internal resistance and high in capacity and has an excellent charging and discharging performance.

This invention provides an internal formation method for pole plates of lead acid batteries including a first stage of several times of alternate charge and discharge, in which, the charge current is 0.13-0.27C/A, the total charge time is 35-55 hours, the discharge current is 0.13-0.27C/A, the discharge time is 0.5-4.5 hours, the battery is put at rest for 0-3 hours after the first stage then to be discharged according to the capacitance then the second stage of charge is done and the charge current is 0.02C-0.1C/A, the total time is 18-21 hours, in which, C expresses the rating volume of the battery.

The invention provides a porous metal in a three-dimensional reticular structure, three layers of metal depositions are arranged in the thickness direction, and the ratio of the metal depositions is (1-5):(1-20):(1-5). The invention also provides a method for preparing the material, comprising the following steps of: after electric conduction, carrying out electro-deposition and thermal treatment on the material at twice, and then carrying out calendaring and surface pretreatment on the material between the first electro-deposition and thermal treatment and the second electro-deposition and thermal treatment, wherein the secondary electro-deposition adopts double metal anodes with different or same areas. The porous metal material can bear large-current charging and discharging performance, strengthen the working safety and prolong the service life of a battery to satisfy the requirement of a power battery; meanwhile, the porous metal material can solve the problems that the material is easy to break and has overlarge internal resistance when applied to the preparation process of an electrode so that the corrosion resistance of the material is effectively improved.

The invention discloses a heating circuit of a battery. The heating circuit comprises a temperature sensor, a battery management device and a charging circuit. The temperature sensor is mounted in a battery pack; the temperature sensor detects the real-time temperature of the battery pack and sends a temperature signal. The battery management device is connected with the temperature sensor; the battery management device receives the temperature signal sent by the temperature sensor. The charging circuit is connected with the battery management device, wherein the battery management device compares the temperature signal with a critical temperature; when the temperature signal is lower than or equal to the critical temperature, the battery management device controls the charging circuit towork in a high-frequency heating mode and the charging circuit heats the battery pack; when the temperature signal is higher than the critical temperature, the battery management device controls the charging circuit to work in a charging mode and the charging circuit charges the battery pack. The heating circuit of the battery is used for realizing heating the battery through the high-frequency charging and discharging to the battery by utilizing the properties that the battery is high in internal resistance at a low temperature and generates much heat, and the influence cannot be generated tothe safety of the battery by high-frequency alternating-current charging and heating.

The invention provides a lithium ion battery cathode, the cathode comprises a current collector and a cathode material layer positioned on the surface of the current collector, wherein the cathode material layer is a copper stibium alloy electroplated layer, the thickness of the copper stibium alloy electroplated layer is 5-40 mum, the weight content of copper in the copper stibium alloy is 35%-65%. The invention also provides a method for preparing the lithium ion battery cathode by depositing the copper stibium alloy on the current collector through an electroplating method. The invention also provides a battery which takes the cathode as the lithium ion battery cathode. The lithium ion battery cathode of the invention has the advantages of excellent conductive performance, cycle performance and heavy current charge and discharge performance, the plated layer and the current collector base material enable strong bonding force, the cathode material on the surface of the current collector possesses a stable structure. The electroplating method used by the invention is capable of accurately regulating and controlling the thickness and component of the copper stibium alloy electroplated layer on the current collector in certain extent, all the steps are carried out under normal temperature, the reaction time is short and the energy consumption is low.

The invention relates to a large-capacity lithium iron phosphate storage battery which is characterized by comprising a plurality of single batteries which are connected in parallel and combined. Eachsingle battery comprises a positive plate, a negative plate, a partition and electrolyte; single battery pole ears and a current collecting plate or the pole ears are folded in half and fastened withthe current collecting plate by adopting the mode of mechanical connection. The large-capacity lithium iron phosphate storage battery has the characteristics of high working voltage, long cycle life,small self discharge and the like, and has the self typical advantages of large capacity (the rated capacity can reach to more than 100Ah), rapid charge and discharge by using large current (more than 200A), reduction of production cost of the storage battery and the like, and is especially suitable for large-capacity and rapid charge and discharge application fields of AGV vehicles and the like.

The invention relates to a battery arc discharge detection method and device and a battery energy storage system. The battery arc discharge detection method comprises the following steps: sampling theterminal voltage and charge-discharge current of a battery, sampling the terminal voltage of the battery twice, calculating a first voltage difference value, sampling the terminal voltage of the battery and the terminal voltage of an electric appliance, and calculating a second voltage difference value, and carrying out time domain and frequency domain analysis on the sampled data to obtain corresponding time domain and frequency domain characteristic values, and judging whether arc discharge characteristics are met or not based on the time domain and frequency domain characteristic values and the first and second voltage difference values so as to determine whether the battery has an arc discharge fault or not. The battery arc discharge detection device comprises a sensor module, a filter sampling circuit, a processor and a communication circuit. The battery energy storage system comprises a battery, a controller and the battery arc discharge detection device. According to the arc discharge detection method and device, arc discharge detection can be conveniently and accurately carried out on the battery, so that the safety can be improved, and a fire disaster caused by an arc discharge fault is prevented.

The invention discloses electronic equipment and a charging and discharging control method. The electronic equipment comprises an on-off unit, a transmitting device, a first coil connected with the transmitting device through the on-off unit, a receiving device, a second coil connected with the receiving device through the on-off unit, and a controller connected with the on-off unit, wherein the controller is used for controlling the on-off unit according to the current state of the electronic equipment to enable the transmitting device or the receiving device to be started; as the transmitting device can supply power to other electric equipment, the receiving device can receive the electric energy of other power supply equipment. Therefore, the electronic equipment disclosed by the invention can be used as both the power supply equipment and the electronic equipment, and further, a wireless charging technology is greatly popularized.

The invention discloses a new energy automobile charging control system which comprises the following parts of new energy automobiles 1, a control center 2, user phones 3, charging piles 4 and a powergrid 5. The charging automobiles are accurately distributed to the charging piles according to the time sequence, charging is standard and controllable, and charging and discharging control efficiency is brought into full play. In the whole automobile dispatching process, the automobiles do not need to queue up to wait, queuing time delay is reduced, the time required for charging and dischargingis shortened, due to the fact that voice or video call data packages serve as channel carriers, channels can be established between automobile users and the control center at any time, hidden addresses are embedded in effective information of the data packages, the capacity of the channels is greatly increased, and the channels are unlikely to interfere in each other when the automobiles are multiple.

The invention discloses a pixel structure, a method for driving the pixel structure, a display substrate and a display panel. The pixel structure comprises a first thin film transistor, a second thin film transistor and a pixel electrode, wherein the first thin film transistor is connected to a grid line on the current line, a data line on the current row, and a pixel electrode, and the second thin film transistor is connected to a grid line on the previous line, a discharge line on the previous line, and the pixel electrode; the second thin film transistor is used for being switched on under the control of the grid line on the previous line, so that the pixel electrode can conduct discharging on the discharge line on the previous line through the second thin film transistor which is switched on; the first thin film transistor is used for being switched on under the control of the grid line on the current line, so that the data line on the current row can conduct charging on the pixel electrode through the first thin film transistor which is switched on. The charging and discharging efficiency of the pixel electrode is improved.

A power supply unit for an aerosol suction device includes: a power supply capable of discharging to a load for generating an aerosol from an aerosol generation source; and a controller capable of controlling charging and discharging of the power supply. The controller is capable of operating in a charging mode for controlling charging of the power supply, a first mode different from the charging mode, and a second mode different from the charging mode and the first mode, and is capable of executing diagnosis processes of the power supply in each of the first mode and the second mode.

The invention provides a battery health degree detection method based on a V2G use scene. According to the method, in a V2G use scene, working parameters in the battery charging process are collected in real time, the battery charging capacity corresponding to the charging process is calculated according to the collected working parameters, and then the corresponding battery health degree can be accurately calculated according to the obtained battery charging capacity; meanwhile, by detecting the corresponding battery health degrees under different cycle times, a relation curve of the battery health degrees changing along with the cycle times can be established, so that the attenuation trend of the battery can be observed. By means of the mode, the battery charging process in the V2G use scene can be effectively utilized, the battery health degree can be accurately and efficiently calculated according to the battery charging capacity without adding an additional test process or test equipment, and then the charging and discharging strategy in the V2G use scene is optimized according to the attenuation trend of the battery; and the method has a higher practical application value.

The invention relates to a current comparison circuit, a memory and a current comparison method. The current comparison circuit comprises a first charging and discharging circuit, a first comparator, a second charging and discharging circuit, a second comparator and an edge detecting circuit, wherein the first charging and discharging circuit is suitable for charging a first charging and discharging node under the control of a control signal, or discharging the first charging and discharging node, and the current during the discharging is first current; the first input end of the first comparator receives reference voltage; the second input end of the first comparator is coupled with the first charging and discharging node, and outputs a first comparison result; the second charging and discharging circuit is suitable for charging a second charging and discharging node under the control of the control signal, or discharging the second charging and discharging node, and the current during the discharging is second current; the first input end of the second comparator receives reference voltage; the second input end of the second comparator is coupled with the second charging and discharging node, and outputs a second comparison result; the edge detection circuit is suitable for detecting the turning edges of the first comparison result and the second comparison, and a first and second current comparison result is obtained according to the time difference of the first comparison result and the second comparison result. The scheme has the advantage that the influence of the current comparison circuit on tested current can be avoided.

The invention relates to a novel battery cooling structure based on coupling of heat pipe and liquid cooling plate, which comprises a battery, a liquid cooling plate and an L-shaped heat pipe, the liquid cooling plate is arranged at the bottom of the battery, the L-shaped heat pipe comprises a vertical evaporation section and a horizontal condensation section, the evaporation section absorbs the heat of the wall surface of the battery main body, and the condensation section transfers heat absorbed by the evaporation section to the liquid cooling plate. The heat pipe is combined with the liquidcooling plate, the heat pipe takes away heat on the wall surface of the battery main body, the heat passes through the evaporation section and the condensation section of the heat pipe and then is taken away through the liquid cooling plate, other energy supplies are not needed in the whole heat dissipation process, and the structure is an efficient and energy-saving cooling mode. The cooling capacity of the liquid cooling plate to the bottom of the battery is not reduced, and the heat dissipation of the wall surface of the battery main body is increased, so that the total heat exchange effect is certainly improved compared with the traditional cooling structure, and the structure can effectively reduce the temperature of the wall surface of the battery, improve the charge-discharge performance of the battery and reduce the influence of reduction of the capacitance of the battery caused by temperature rise.

The invention provides a capacitance detection circuit and a capacitance detection method. The capacitance detection circuit is used for carrying out capacitance value detection on a bare glass panel which comprises correspondingly connected GOA unit and panel capacitor. When the capacitance value detection is carried out on the bare glass panel, the capacitance detection circuit is connected to the GOA unit which is connected to a signal input end. The GOA unit receives a signal inputted by the signal input end and carries out conductive connection, and the capacitance detection circuit carries out charging and discharging on the panel capacitor and obtains charging voltage of the panel capacitor, and calculates and outputs the capacitance value of the panel capacitor according to the charging voltage of the panel capacitor. By using the capacitance detection circuit of the invention, a failed single cell is intercepted at a bare glass panel stage, the panel scrap of a manufactured panel due to a low yield is avoided, and thus the purposes of reducing waste and reducing cost are achieved.

The invention discloses a button cell seal ring and a button cell. The technical scheme is as follows: the button cell seal ring is in a single straight body structure with a clamp ring. The button cell comprises the seal ring, wherein the seal ring is in the single straight body structure with the clamp ring. According to the button cell, the double-seal-ring structure is charged into a single-seal-ring structure, the inner space of the button cell is greatly increased so as to create the conditions for enlarging the capacity of the cell under the condition that the external size of the button cell is not changed, and due to a shell of the cell with the structure, the double-connecting-sheet assembling mode can be possibly realized. The reaction area of a positive electrode and a negative electrode is enlarged, and the charge and discharge current density is lowered, so that the conditions for compositing hydrogen and oxygen during the charging the cell are provided, and the inflating problem of the cell caused by large internal charging pressure, and the problem that the button cell can not be rapidly charged can be efficiently solved. Moreover, the efficient space of the cell is enlarged, so that the short circuit ratio is lowered during the assembling of the positive electrode and the negative electrode. The ratio of finished products of the button cells is improved.