90results about How to "Guaranteed power" patented technology

The invention relates to the technical field of semiconductors, particularly provides an IGBT and silicon carbide MOSFET hybrid parallel power module, a motor controller and a vehicle, and aims to solve the problems of high cost and low yield of a power module manufactured by a full silicon carbide MOSFET chip. In order to achieve the purpose, the IGBT and silicon carbide MOSFET hybrid parallel power module comprises a mounting base, semiconductor modules distributed in an array mode are arranged on the mounting base, each semiconductor module comprises an upper bridge arm mechanism, a lower bridge arm mechanism and a substrate, and the upper bridge arm mechanisms and the lower bridge arm mechanisms are connected in series to form a half-bridge structure; the upper bridge arm mechanism comprises an IGBT chipset, a silicon carbide MOSFET chipset and an upper bridge gate signal terminal; a gate of the silicon carbide MOSFET chip of the upper bridge arm mechanism and a gate of the IGBT chip are connected with the upper bridge gate signal terminal; the lower bridge arm mechanism comprises an IGBT chip set, a silicon carbide MOSFET chip set and a lower bridge grid signal terminal. A grid of the silicon carbide MOSFET chip of the lower bridge arm mechanism and a grid of the IGBT chip are connected with the lower bridge grid signal terminal.

The invention relates to an electric drive axle and an electric truck. An electric drive axle is used for an electric truck, the electric drive axle is provided with a main drive motor, an auxiliary drive motor, a speed reducer assembly and a differential mechanism, the speed reducer assembly is provided with a gear shifting mechanism, a main drive first-stage speed reduction stage, an auxiliary drive first-stage speed reduction stage, a main drive second-stage speed reduction stage and an auxiliary drive second-stage speed reduction stage, the main drive secondary speed reduction stage and the auxiliary drive secondary speed reduction stage can be respectively connected with an output shaft of the speed reducer assembly through a gear shifting mechanism, the output shaft is directly connected with the differential mechanism, and the main drive secondary speed reduction stage comprises a main drive first-gear driving gear, a first-gear driven gear meshed with the main drive first-gear driving gear, a main drive second-gear driving gear and a second-gear driven gear meshed with the main drive second-gear driving gear. The auxiliary drive two-stage speed reduction stage comprises an auxiliary drive first-gear driving gear, a first-gear driven gear meshed with the auxiliary drive first-gear driving gear, an auxiliary drive second-gear driving gear and a second-gear driven gear meshed with the auxiliary drive second-gear driving gear. The electric truck according to the invention has an electrically driven axle.

The invention belongs to the technical field of electric power system analysis, and mainly relates to a new energy consumption-oriented high-capacity energy storage partition optimization configuration method, which comprises the following steps of: firstly, dividing a power grid model into a plurality of regions according to geographic and electrical characteristics of the selected power grid model, and determining regional energy storage requirements after determining partitions of the power grid model; further constructing a total cost optimization scheduling model of the maximum new energy consumption and the minimum energy storage system, determining constraint conditions of the target according to a load balance constraint, an energy storage system capacity constraint and a new energy processing limit, processing by using a mixed integer linear investment and operation cost planning method, and solving an optimal solution through iteration; more importantly, after the optimization scheduling model is solved preliminarily, the energy storage configuration function of each region is adjusted in real time according to time, system load and new energy consumption amount by updating the energy storage configuration step by step, and finally, the precision of energy storage configuration parameters is guaranteed.

The invention discloses a dynamic frequency adaptive automatic gain control system, which belongs to the field of dynamic frequency adjustment and comprises a radio frequency power amplifier, an attenuator, a logarithmic detector, a low-pass filter and a comparison and control signal generation module. The amplified radio frequency signal is input into the attenuator; the attenuator attenuates the signal so that the input radio frequency signal reaches a range suitable for detection of the logarithmic detector after attenuation; the logarithmic detector converts the radio-frequency signal into a direct-current voltage proportional to the signal power; voltage signals of direct-current voltage output by the logarithmic detector are smoothed through a low-pass filter, and rapidly changing components are removed; and the comparison and control signal generation module compares the smoothed voltage with a reference voltage, generates a control signal for adjusting the gain, and adjusts the gain. According to the invention, instant gain adjustment is provided under the condition of rapidly changing signals, and the energy efficiency of the system is improved.

The utility model aims to disclose a mining single-armed drill carriage, which relates to the technical field of coal mine tunnel drill carriages and comprises a chassis, an anchor protection component and a power part, the anchor protection assembly is arranged at the front end of the chassis, and the power part is arranged behind the anchor protection assembly; the power part comprises a fixed plate, an explosion-proof diesel engine, a diesel oil tank, a water replenishing tank, a water washing tank, an air filter, a wireless remote control receiver, a hydraulic pump and a hydraulic oil tank; the explosion-proof diesel engine and the water washing tank are both arranged at the rear end of the fixing plate, the hydraulic pump and the hydraulic oil tank are both arranged at the front end of the fixing plate, and a smoke exhaust port of a smoke exhaust pipe of the explosion-proof diesel engine is formed in the top of the water washing tank. The device can flexibly adapt to narrow roadways; the explosion-proof diesel engine, the diesel oil tank, the water replenishing tank, the water washing tank, the hydraulic pump, the hydraulic oil tank and the like are compactly arranged, so that the power of the drill carriage is ensured under the condition of a narrow carriage body.

The invention provides a vehicle control method, device and equipment, a storage medium, a product and a vehicle wherein the vehicle control method comprises: obtaining a vehicle weight and a driving environment, the driving environment comprising a gradient; according to the vehicle weight and the driving environment, a power adjustment coefficient is determined, and the power adjustment coefficient represents the stepless adjustment degree among a plurality of driving modes of the vehicle; and determining a target control strategy of the vehicle according to the power adjustment coefficient, and performing power control on the vehicle according to the target control strategy. According to the method, stepless adjustment among the control strategies corresponding to the multiple driving modes of the vehicle can be automatically achieved according to the real-time vehicle weight and the driving environment, and consideration of the dynamic property and the economical efficiency is achieved.

The invention discloses a large-electric-quantity range-extending type electric vehicle calibration method. An overall calibration framework comprises driving mode calibration, energy management calibration, battery low-temperature protection calibration, battery discharge limit calibration and electric drive external characteristic limit calibration. Adaptive calibration is carried out on functional modules such as mode management and energy management of a large-electric-quantity extended-range electric commercial vehicle, the whole vehicle only discharges a battery under most working conditions, the consumption ratio of electricity and oil is reasonably distributed, meanwhile, the system configuration advantages are exerted, the dynamic property of the whole vehicle is guaranteed as much as possible, meanwhile, overcharge protection of the battery is considered, and the system reliability is improved. The car using income of a user is maximized, greater value is created for the user, and core parts are also protected; the VCU dynamically adjusts the allowable power generation power of the APU in real time according to the available charging power of the battery, it is guaranteed that the battery cannot be overcharged under the dynamic working condition, the braking energy efficiency and the braking performance are guaranteed, abrasion of mechanical braking is reduced, and the battery is protected.

The guide rail cleaning device for ink jet printing comprises a guide rail body, a sliding seat, mounting plates arranged on the two sides of the sliding seat and a collecting mechanism, the sliding seat is slidably mounted on the guide rail body, and a spray head is fixedly mounted at the top of the sliding seat; a driving mechanism, a horizontal plane cleaning mechanism and a vertical plane cleaning mechanism are arranged on the mounting plate, and the collecting mechanism comprises a fixing part, a collecting cavity, positioning plates mounted on the two opposite side walls of the collecting cavity and bends mounted on one sides of the tops of the positioning plates. Under the action of the horizontal plane cleaning mechanism and the vertical plane cleaning mechanism, the purpose of cleaning printing ink on the top and the side face of the guide rail body can be achieved, meanwhile, impurities attached to the guide rail body can be cleaned up, and the efficiency and quality of cleaning the printing ink on the guide rail body are guaranteed; and under the action of the collecting mechanism, printing ink scraped from the guide rail body can be collected, and it is guaranteed that printed matter is clean and tidy in the printing process.

The invention relates to the technical field of power grid power supply and distribution control, in particular to a micro-grid intelligent power balance control method, device and system, and the method comprises the steps: obtaining the output voltage of a micro-grid photovoltaic panel line at each collection moment, and obtaining the local voltage distribution fluctuation degree of each output voltage in an output voltage sequence; obtaining an illumination floating influence degree; the method comprises the following steps: acquiring an operation steady-state reference voltage by combining different voltage values in all output voltages and the occurrence times of the different voltage values in an output voltage sequence, further acquiring the voltage change intensity in a line, calculating a boost regulation and control coefficient based on the voltage change intensity, and calculating the boost regulation and control coefficient by combining the difference between a preset maximum boost value and the operation steady-state reference voltage. And acquiring a boost regulation and control value of the line to calculate a target voltage regulation value of the buck-boost converter, and regulating the output voltage of the photovoltaic panel through the buck-boost converter. According to the invention, the balance of micro-grid power can be maintained.

The utility model discloses a high-energy-efficiency electromagnetic heating frying pan and a frying machine, the high-energy-efficiency electromagnetic heating frying pan comprises a round pan inner container used for cooking, a round pan outer cover used for installing the round pan inner container, and a hollow electromagnetic heating plate used for providing heat for the round pan inner container; the round pot inner container is installed in the round pot outer cover, the hollowed-out electromagnetic heating disc is located below the round pot inner container, a heat insulation support is arranged at the bottom of the round pot inner container, one end of the heat insulation support is fixedly connected with the bottom of the round pot inner container, and the other end of the heat insulation support is fixedly connected with the hollowed-out electromagnetic heating disc. The distance between the bottom of the round pot inner container and the hollowed-out electromagnetic heating disc is 8-12 mm. According to the electromagnetic heating frying pan, an electric heating tube heating mode is replaced with an electromagnetic heating mode, the hollow structure of the electromagnetic heating disc is optimized to be designed into the hollow electromagnetic heating disc, the space distance between the bottom of the round pan inner container and the hollow electromagnetic heating disc is designed, the power of the electromagnetic eddy current effect is guaranteed, and effect-gathering heating of the electromagnetic heating frying pan is achieved.

The invention relates to the technical field of electric vehicle control, in particular to a method for processing communication loss of a vehicle control unit and a battery controller, which comprises the following steps that: 1, when a VCU detects that a BMS key message or the whole BMS message is not received and lasts for a certain time, the VCU judges a communication loss fault with the BMS; 2, when diagnosing that the communication loss fault with the BMS is equal to 1, the VCU immediately locks some important parameters of the whole vehicle at the moment when the loss fault occurs; 3, the VCU judges according to the important parameters, so that the whole vehicle smoothly transits to a safe state; 5, the VCU sends information to the ICM instrument to be displayed, the display character can be a BMS communication loss super limphome mode, and meanwhile a whole vehicle system fault lamp and a battery system fault lamp are turned on to warn a driver; the problems that at the present stage, after a VCU cannot receive CAN information of a BMS controller, zero-power processing is adopted, the whole vehicle is in the state of being not powered on and not capable of being driven and can only wait for rescue, certain economic losses are caused to a driver, and the safety is affected are solved.

The invention relates to a single-motor five-gear transmission electric drive axle system and a vehicle. The single-motor five-gear transmission electric drive axle system comprises a motor, a first gear shifting mechanism, a second gear shifting mechanism, a planet row assembly and three transmission gear sets. The planet row assembly comprises a sun gear, a planet gear, a planet carrier and a gear ring; the three transmission gear sets comprise a first driving gear, a first driven gear, a second driving gear, a second driven gear and a third driven gear; the motor is connected with the input shaft, and the input shaft is meshed with the normally-meshed intermediate shaft. The first driving gear and the second driving gear are sequentially arranged on the normally engaged intermediate shaft, and the first gear shifting mechanism is arranged between the first driving gear and the second driving gear; the first driven gear and the second driven gear are fixedly arranged on the sun wheel shaft, the sun wheel shaft is sleeved with the third driven gear in an empty mode, and the second gear shifting mechanism is arranged between the third driven gear and the planet row assembly; five transmission gears are formed through cooperation of the first gear shifting mechanism and the second gear shifting mechanism.

The invention discloses a single-motor hybrid power system based on an automatic mechanical transmission and a control method. The system comprises an engine, an automatic clutch, a motor and the automatic mechanical transmission which are connected in sequence. The automatic mechanical transmission comprises an input shaft, a transmission driving gear set, a main shaft, a main shaft gear set, an auxiliary shaft, an auxiliary shaft gear set, a planetary gear mechanism and an output shaft, the planetary gear mechanism comprises a gear ring, a planet gear, a planet carrier and a sun gear; the motor is fixedly connected with the engine, the input shaft is sleeved with the automatic clutch in an empty mode, and the motor is fixedly connected with the automatic mechanical transmission and conducts power transmission through meshing of an input shaft outer spline and a motor inner spline. Different driving modes such as engine driving, motor driving, hybrid driving and energy recovery of the vehicle can be achieved by selecting the working modes of the driving motor, the engine and the automatic mechanical transmission.

The invention provides an energy coordination distribution control system and method for double intelligent power units of a heavy duty vehicle, and relates to the technical field of hybrid electric vehicles. The battery management system is used for acquiring state information of a power battery; the vehicle controller is used for receiving the state information of the power battery, obtaining the required power of the vehicle and the state information of the first intelligent power unit and the second intelligent power unit, designing constraint conditions when judging that the current state of the vehicle is a driving state, and taking the minimum fuel consumption of the first intelligent power unit and the second intelligent power unit as a target function; and solving a first power instruction and a second power instruction under the condition that the SOC of the power battery is ensured to be at a certain threshold value or set electric quantity, sending the first power instruction to the first intelligent power unit, and sending the second power instruction to the second intelligent power unit. The power demand of the whole vehicle can be quickly responded, the fuel economy of the intelligent power unit is improved, the cycle life of the battery is prolonged, and the operation reliability of the intelligent power unit is improved.

The invention discloses a method and device for automatically supplementing the electric quantity of a storage battery and a medium, and the method comprises the steps: carrying out the electric quantity monitoring of the storage battery, so as to determine whether the electric quantity of the storage battery continuously drops to an electric quantity threshold value or not; if yes, the running state of a vehicle engine is monitored to determine whether the running state of the engine affects the power of the whole vehicle or not; under the condition that the running state of the engine does not affect the power of the whole vehicle, the electricity supplementing generator is controlled to be started at the highest gear for automatic electricity supplementing; and under the condition that the running state of the engine affects the power of the whole vehicle, low-electric-quantity early warning is conducted, the electricity supplementing generator is controlled to be started at a low gear, and automatic electricity supplementing of the vehicle is achieved. The problem of insufficient electricity of the engine is solved, the risk of feed damage of the storage battery is reduced, the electricity utilization safety of the vehicle is guaranteed, unnecessary electricity supplementing operation is avoided, energy consumption and the burden of the engine are reduced, the durability and fuel economy of the engine are improved, and the running cost of the vehicle is reduced.

The present invention discloses a vehicle battery charging method, system and vehicle, the method comprising: determining whether the vehicle is in an ignition-off state; if so, detecting whether the battery voltage is lower than a first threshold; when the battery voltage is lower than the first threshold and the charging gun is connected to a power battery pack, determining whether the remaining power of the power battery pack is higher than a second threshold; when the remaining power of the power battery pack is higher than the second threshold, or when the charging gun is not connected to the power battery pack, starting the pre-charging working mode of the battery to charge the battery. The present invention can ensure that the vehicle can start normally after being stored for one month even if a battery with a small capacity is selected, effectively reducing the cost and weight of the vehicle; it can also solve the problem of starting the battery charging function when the vehicle power battery pack is connected to a charging gun, or when the vehicle is in a non-ignition-off state, to ensure the power of the vehicle battery.

This utility model relates to a novel 110V battery traction control system for improving vehicle operating speed. It includes a traction converter, a first battery pack, a second battery pack, a connecting assembly, a charging assembly, a first switching component, and a second switching component. The first switching component has a first position connecting the first battery pack to the charging assembly and a second position connecting the first battery pack to the traction converter. The second switching component has a third position connecting the second battery pack to the charging assembly and a fourth position connecting the second battery pack to the traction converter. When the first switching component is in the second position and the second switching component is in the fourth position, the connecting assembly connects the first and second battery packs in series or parallel and then connects them to the traction converter. By using the connecting assembly, the first and second battery packs can be connected differently depending on the vehicle's operating conditions. When connected in parallel, it meets the requirements for slow vehicle operation in depots / parking lots; when connected in series, it allows for approximately double the vehicle's speed.

The application discloses a hydrogen production power supply system, a control method, a medium and a control system. The hydrogen production power supply system comprises multiple power units and multiple electrolytic cells. Each power unit comprises an AC / DC module and a DC / DC module. The input ends of the AC / DC modules are connected with a power grid. The output ends of the AC / DC modules are connected with each other to form an intermediate DC loop. The input ends of the DC / DC modules are connected with the intermediate DC loop. The output ends of the DC / DC modules are connected with the electrolytic cells one by one. The control method comprises the following steps: 1) obtaining state information of the hydrogen production power supply system; and 2) distributing the power of the AC / DC modules according to the state information of the hydrogen production power supply system so that as many AC / DC modules as possible work in an optimal efficiency range, and distributing the power of the DC / DC modules to meet the demand power of the electrolytic cells. The application has the advantages of ensuring the system operation efficiency and the like.

The invention discloses a motor torque control method which is applied to an electric vehicle, and the electric vehicle is a double-motor four-wheel-drive electric vehicle. The method comprises the steps that front and rear motors are controlled to apply torque to front and rear shafts to make wheels rotate; front axle differential protection limiting torque is determined according to the rotating speed difference of left and right front wheels; determining a rear axle differential protection limiting torque according to the rotating speed difference of the left and right rear wheels; judging whether the front axle and the rear axle slip or not according to the front axle differential protection limiting torque and the rear axle differential protection limiting torque; when one of the front axle and the rear axle slips and the other one does not slips, the differential protection limiting torque corresponding to the slipped axle is subtracted from the request torque applied to the slipped axle; adding differential protection limiting torque corresponding to the shaft which slips into the request torque applied to the shaft which does not slips; and the left front wheel, the right front wheel, the left rear wheel and the right rear wheel are driven to rotate through the adjusted request torque.

The present application relates to the field of steam turbine control technology, and in particular to a steam turbine system and control method for regulating steam inlet pressure. The steam turbine system includes a steam turbine and a compressor, as well as an electronic governor and a control module that communicate with each other; the process gas outlet of the chemical reactor is connected to the compressor through a first pipeline, and the steam outlet is connected to the extraction condensing steam turbine through a second pipeline; the second pipeline is provided with a quick-closing valve that communicates with the control module and a steam inlet regulating valve that communicates with the electronic governor, an overflow pipeline is connected between the high-pressure section and the low-pressure section of the steam turbine, and an overflow valve that communicates with the electronic governor is provided on it, and the steam extraction port of the high-pressure section is connected to the steam extraction pipeline, and a steam extraction check valve that communicates with the control module is provided on it; the steam turbine system of the present application can achieve the effect of maintaining both the forward pressure and the load, and also proposes a new solution for handling excess steam in the chemical reactor.

The utility model provides a hybrid mine truck gearbox assembly which enables a pure fuel vehicle to be upgraded to a hybrid vehicle type and reduces the use cost of the vehicle. The transmission is expanded based on a manual transmission and is characterized by comprising a transmission, the transmission comprises a shell, an engine power input shaft, an output shaft and at least one set of intermediate shafts are arranged in the shell, the input shaft and the output shaft are coaxially arranged, and the intermediate shafts are sleeved with corresponding multi-gear transmission gears; a corresponding multi-gear output gear and a corresponding gear shifting mechanism are arranged on the output shaft; a motor; and a motor driving gear.

The invention relates to the field of new energy automobile control systems, in particular to an accelerator pedal position self-learning control system and method.The accelerator pedal position self-learning control system comprises a body control module (BCM), a vehicle control unit (VCU), a first accelerator pedal and a second accelerator pedal, and is characterized in that the BSM and the VCU are in signal connection through a CAN bus; the VCU is connected with the first accelerator pedal and the second accelerator pedal through power lines, a downward and upward self-learning control strategy of the accelerator pedals is used, and the problems that at the present stage, when a driver does not step on the accelerator pedal, the opening degree of an accelerator is larger than 0%, the driver already steps on the accelerator pedal to the end, and the accelerator pedal is damaged are solved. However, the opening degree of the accelerator is not 100%, so that the dynamic responsiveness of the vehicle and the driving safety of the vehicle are ensured.

The application discloses a physical downlink control channel (PDCCH) transmission method, a terminal and a network side device, and belongs to the technical field of communication. The PDCCH transmission method comprises the following steps: a network side device determines a target position of a first complex symbol sequence in a second complex symbol sequence, and places the first complex symbol sequence at the target position in the second complex symbol sequence; the first complex symbol sequence is used for carrying data of a PDCCH; the network side device performs DFT or conversion precoding processing on the second complex symbol sequence to obtain a third complex symbol sequence; and the network side device maps the third complex symbol sequence to a target time-frequency resource and transmits the third complex symbol sequence.

This invention discloses a joint optimization method and system for task offloading and resource allocation based on SAGIN. It collects task and scheduling information through a SAG-IoT system; utilizes the task data and scheduling information to achieve optimal association between UAVs and IoT devices based on a matching game algorithm, and makes optimal decisions for task offloading to maximize the computational performance of the SAG-IoT system; based on optimal association, optimal task offloading decisions, and maximizing the computational performance of the SAG-IoT system, it constructs an online offloading framework based on deep reinforcement learning, constructing a path from input X(t) to optimal action x. * The low-complexity mapping strategy (t) is based on repeated interactions between different modules and a random environment, iterating and running sequentially to achieve joint optimization of task offloading and resource allocation. This invention achieves optimal computational performance while stabilizing the system queue. In addition to utilizing binary computation offloading, the optimization framework can also be extended to online partial computation offloading strategies consisting of multiple independent subtasks.

The present invention provides a thick electrode and a manufacturing method and application thereof, wherein the active layer of the thick electrode comprises first active stripes and second active stripes arranged alternately horizontally in sequence; the particle size of the active main material in the first active stripes is smaller, but the thickness is the same as that of the second active stripes, so that the porosity of the first active stripes is lower than that of the second active stripes, and the width of the first active stripes is maintained at 5 to 20 times the width of the second active stripes. The first active stripes of the present invention are relatively wide, which ensures the high capacity and high power of the thick electrode. On this basis, the particle size of the active main material in the second active stripes is relatively large, and after roll forming, the porosity is relatively large, and it is distributed in the gap formed by the first active stripes with a relatively narrow width, which can significantly improve the infiltration rate and degree of the electrolyte with the entire active layer, and at the same time can reduce the internal resistance of the battery, thereby improving the rate performance of the thick electrode.

The invention relates to a vehicle control method and device, a vehicle and a storage medium and relates to the field of automatic control, and the method comprises the steps that under the condition that the opening degree of an accelerator pedal of the vehicle is changed, the motor rotating speed and the target torque of the vehicle are obtained; motor parameters of the vehicle are determined according to the motor rotating speed, and the motor parameters comprise output torques of the main driving motor and the auxiliary driving motor under different efficiencies; and controlling the vehicle according to the motor parameters and the target torque. According to the method, the output torque of the main driving motor and the output torque of the auxiliary driving motor at different rotating speeds are determined according to the rotating speed of the current driving motor, and finally the target torque is distributed according to the motor parameters and the target torque, so that the distribution efficiency of the target torque can be improved on the premise of ensuring the dynamic property of the vehicle, and thus, the efficiency of the vehicle is improved. The efficiency of the whole vehicle driving system is improved, the energy consumption of the driving system is reduced, and the endurance mileage of the vehicle is increased.

The invention relates to the technical field of smoke concentration detection, and discloses a smoke concentration detection method and system for laser cutting, and the method comprises the steps: obtaining a workpiece imaging image, and determining a focus passing path according to the workpiece imaging image; analyzing the number and angle of inflection points in the passing path to determine a target cutting speed; obtaining the thickness of a machined workpiece to determine initial power, and determining the number of cutting times according to the initial power; detecting smoke generated in the first cutting stage and the second cutting stage to obtain smoke concentrations, and dividing detection modes into a laser cutting average smoke concentration detection mode and a space average smoke concentration detection mode according to the smoke concentrations; and the smoke coverage range and the laser cutting average smoke concentration coverage range are obtained to determine a safe area. By adjusting parameters in the laser cutting process and the smoke concentration in the safe area, the influence of the smoke concentration in the safe area on the body of an operator is reduced.

The invention relates to a preparation method of a photovoltaic module and the photovoltaic module, which can prevent glue from shielding adjacent fine grid lines after a welding strip is pressed on each fine grid line, and the method comprises the following steps: respectively applying glue to a plurality of glue applying positions on a welding surface of a battery piece, the glue applying positions being arranged among the fine grid lines arranged along a first direction, the distance between every two adjacent fine grid lines is 1.05 mm to 1.13 mm, the thixotropic index Ti of the glue is 2.4 to 3.2, and the gluing width is 0.4 mm to 0.52 mm; a welding strip is stacked on the welding face and located on the glue, the length direction of the welding strip is in the first direction, the width direction of the welding strip is perpendicular to the first direction, the thickness direction of the welding strip is perpendicular to the battery piece, and the width of the welding strip ranges from 0.2 mm to 0.26 mm; a welding strip is pressed on the fine grid lines through a pressing tool; the glue is solidified; and welding a welding strip to each fine grid line.

The present application provides a method, device, vehicle and storage medium for controlling mode switching, the method comprising: in the process of switching the vehicle from the series mode to the direct drive mode, when it is determined that the second clutch is open, controlling the second input shaft to be engaged in an even gear; if it is detected that the gear position of the second input shaft is neutral, determining that the even gear on the second input shaft is unavailable; when it is determined that the even gear on the second input shaft is unavailable, if it is monitored that the vehicle meets the preset conditions for switching to the series mode, controlling the second clutch to close; when the second clutch is in a closed state, controlling the first clutch to open, so that the vehicle switches back from the direct drive mode to the series mode. The method can automatically switch back to the series mode when the vehicle is stuck during the mode change process, ensuring the normal power output of the vehicle.

This application provides a muffler, belonging to the field of vehicle technology. The muffler includes a housing, chamber partitions, an intake pipe, a muffler pipe, an exhaust pipe assembly, and a switching valve. The housing and multiple chamber partitions located within the housing enclose multiple muffler chambers arranged sequentially along the length of the housing. The expansion muffler chamber is connected to the intake pipe, and the expansion muffler chamber and the Helmholtz muffler chamber are connected through a muffler pipe located within the housing. The exhaust muffler chamber is located downstream of the expansion muffler chamber along the exhaust path of the muffler, and is connected to the outside of the housing through the exhaust pipe assembly. An exhaust passage is used to connect the expansion muffler chamber and the exhaust muffler chamber. The switching valve is used to open or close the exhaust passage. The expansion muffler chamber is located between the exhaust muffler chamber and the Helmholtz muffler chamber. The muffler of this application embodiment can meet the noise reduction requirements of the engine under different operating conditions and improves the reliability of engine noise reduction under high back pressure.