15results about How to "Increase volumetric power density" patented technology

The invention provides a fuel cell cooling system based on a vortex tube cooling effect, which comprises an air compressor, an intercooler, a humidifier, an electric pile, a check valve, a silencer, a three-way valve and a heat dissipation assembly which are connected in sequence, and is characterized by further comprising a vortex refrigeration tube and a plate heat exchanger, and the vortex refrigeration pipe is arranged between the silencer and the stop valve. According to the fuel cell cooling system based on the vortex tube cooling effect, by arranging the vortex cooling tube, high-pressure gas discharged from the tail of the system is utilized, and cold air generated by the vortex cooling tube is merged into the cooling system of the system, so that the energy consumption of heat dissipation is reduced, and the overall efficiency of the system is improved; and the volume of a heat dissipation assembly part which is one of the maximum components of the system is reduced, so that the overall volume of the system is reduced, and the volume power density of the system is improved. The auxiliary power consumption of the system is indirectly reduced, the integration level of the system is higher, and the cost is reduced.

The present invention discloses a ship-borne impact-type swing-driven wave generator, which relates to the field of new energy equipment, including a machine base, a swing rod, a pendulum, an impact roller, an arc-shaped guide rod, a damping spring and an impact-type generator. The present invention utilizes a mass block composed of a swing rod, a pendulum and an impact roller and an inertial vibrator composed of a damping spring to absorb the wave energy that drives the hull to swing, and acts on a one-way bearing mechanism through impact and converts it into a one-way rotation of the generator rotor and temporarily stores the mechanical energy in the form of rotational inertia energy. At the same time, the stator coil of the generator couples the magnetic field of the rotor to generate a pulsating induced potential, and finally utilizes a rectifier circuit and an energy storage battery to convert the pulsating potential into a stable voltage and supply power to the ship-borne electrical load equipment. The present invention has the advantages of simple structure, high energy conversion efficiency and volume power density, reliable operation and low cost.

The invention provides a preparation method of a PEM water electrolysis membrane electrode, which relates to the field of PEM water electrolysis hydrogen production. Titanium dioxide nanotubes are used as supporting materials to prepare an anode diffusion layer. Because the tube structure has high gas and liquid conductivity, it is beneficial to the separation of oxygen and water in the water electrolysis process. The titanium dioxide nanotubes are calcined at high temperature to transform into a rutile lattice structure, which has high conductivity and stability. The anode diffusion layer is prepared by stacking multiple thin single-layer supporting layers, and the porosity can be controlled within a suitable range. The anode diffusion layer has higher mechanical strength, plays a supporting role, meets the mechanical strength requirements of the water electrolyzer during operation, has higher porosity, and can effectively improve the transmission of water and gas between layers. The precious metal undergoes a solid phase reaction to be embedded in the surface of the rutile titanium dioxide nanotubes to form a dense catalytic conductive network structure, which is not easy to fall off, and can realize the batch preparation of membrane electrodes.

This utility model discloses a gas distribution structure for a fuel cell stack, relating to the field of fuel cell technology. It includes a stack core and a shell. The bottom of the stack core has a bottom gas distributor and a bottom air distributor, and the top of the stack core has a top gas distributor. The bottom gas distributor and the bottom air distributor are respectively provided with a gas inlet and an air inlet, and the top gas distributor is provided with a gas outlet and an air outlet. An inner cavity and an outer cavity are formed between the stack core and the shell, with the inner cavity communicating with the air outlet. Gas enters through the gas inlet, flows into the stack core through the bottom gas distributor, and then flows out through the gas outlet. Air enters the stack core through the outer cavity, reacts, and then flows out through the air outlet. This utility model improves the gas distribution method, eliminates the need for a gas manifold, reduces the stack volume, and increases the volumetric power density of the fuel cell stack.

The invention discloses a fuel cell module, an assembling and positioning assembly and a vehicle. The fuel cell module comprises a box body, a galvanic pile, an insulating support assembly and more than two cross beams, the insulating support assembly is arranged between the box body and the galvanic pile, the insulating support assembly is in contact with each side surface of a reactor core of the galvanic pile and each inner side surface of the bearing frame, and the insulating support assembly can support the side surface of the reactor core and resist inter-layer slippage of the galvanic pile; gaps are formed between the insulating supporting assemblies and the end plates and the collector plates of the electric pile, and the gaps can serve as buffer spaces, so that the insulating supporting assemblies are prevented from being damaged due to impact of the end plates and the collector plates. The more than two cross beams are arranged between the blind end of the electric pile and the box body, the two ends of each cross beam are connected to the bearing frame, and the bearing frame applies fastening force towards the air inlet end plate assembly through the cross beams, so that box body packaging is realized. The cross beam abuts against a limiting groove formed in the blind end plate assembly, and the blind end plate assembly is limited through the bearing frame and the cross beam.

The invention discloses a multi-role integrated common mode choke for a Marx generator. The multi-role integrated common mode choke comprises a foil type capacitive winding and a trigger switch. The foil type capacitive winding is formed by alternately stacking metal foils and insulating films and rolling the metal foils and the insulating films in parallel in the circumferential direction, the insulating films are arranged between the adjacent metal foils, and the metal foils and the insulating films jointly form an energy storage capacitor; each metal foil is a winding, two ends of each foil type capacitive winding are respectively provided with a lead, the head end and the tail end of each foil type capacitive winding are dotted terminals, and when the foil type capacitive windings work in a differential mode state, the foil type capacitive windings are connected with a charging power supply through low impedance. Current flows in from the dotted terminal of one foil type capacitive winding and flows out from the dotted terminal of the other foil type capacitive winding. As a basic unit, the multi-role integrated common mode choke can replace a traditional charging and discharging resistor, an energy storage capacitor and a trigger switch, is cascaded to form the Marx generator, is short in charging time, high in charging and discharging efficiency, capable of working at high repetition frequency, modularized and compact in structure.

The embodiment of the utility model discloses a motor controller and an automobile, and relates to the technical field of inverters. The motor controller comprises a capacitor, a conductive conductor and a controller shell. And different polarities of the capacitor are respectively provided with a single row of capacitor terminals. The conductive conductor is provided with multiple layers of conductive bar bodies, and the single face of the capacitor terminal is welded to the multiple layers of conductive bar bodies. And the capacitor is encapsulated in the controller shell. According to the motor controller, through single-layer outgoing line arrangement of the capacitor terminals and layered arrangement of the conductive conductors, the conductive conductors used for connecting a plurality of power modules can be welded to the capacitor terminals in a single-sided manner, so that welding seams and welding procedures are reduced, and the process cost is reduced.

The application provides an electric heating compensation type spray evaporation cavity, an air intake system and a control method thereof. The spray evaporation cavity is sequentially provided with an inlet, a high-pressure nozzle, an evaporation cavity and an outlet along an air intake direction. The high-pressure nozzle is used for spraying water mist into the evaporation cavity, and the sprayed water mist has the same velocity component as the air intake direction. A heating array composed of multiple electric heating sheets is arranged in a region where the gas in the evaporation cavity and the water mist are mixed. By using the electric heating compensation type spray evaporation cavity provided by the application in the air intake system, the change range of temperature and humidity can be improved compared with the traditional membrane humidifier, the controllability is increased, so that the low-power operation condition of the fuel cell system is better adapted, and in the high-power operation condition, the electric compensation can be closed, and the heat required for the droplet gasification is completely provided by the high-temperature air at the outlet of the air compressor, so that the energy consumption is further reduced.

According to the bipolar plate provided by the invention, the plurality of gas ports are uniformly arranged on the four side edges of the bipolar plate surface, meanwhile, the bipolar plate surface is divided into two reaction areas, and each reaction area comprises at least one group of matched reaction gas inlet and reaction gas outlet and at least one group of oxidized gas inlet and oxidized gas outlet; the arrangement mode of the gas ports is optimized, complex gas flow channel design is not needed, a distribution area is eliminated, the area of the reaction area is greatly increased, the volume power density of the fuel cell is greatly improved, and the volume power density of the fuel cell can be greatly improved by changing the reaction gas in each reaction area and the matching scheme of the gas inlet and the gas outlet of the reaction gas. And the flowing modes of hydrogen and air in each reaction area are flexibly controlled, so that better hydrothermal management design is realized.

The utility model provides an electric heavy truck inverter power supply which comprises a power battery, a pre-charging resistor, a first capacitor and a DC / AC inverter transformation circuit, the power battery is connected with a first relay switch, a fuse and the DC / AC inverter transformation circuit in series to form a main loop, and the DC / AC inverter transformation circuit is connected with the first capacitor in parallel. The pre-charging resistor is connected in series with the second relay switch and then connected in parallel with the first relay switch; the DC / AC inverter transformation circuit is used for converting the high-voltage direct current of the power battery into 220V alternating current; and the power battery, the first capacitor C1 and the DC / AC inverter transformation circuit are integrated in the all-in-one controller. The DC / AC inversion transformation circuit is integrated in the all-in-one controller of the electric heavy truck, a thick cable does not need to be added to a starting battery to take electricity, low-voltage power distribution balance of an original truck is not affected, the risk that the starting battery feeds electricity due to electricity utilization does not exist, and the safety coefficient of the truck is higher.

This invention relates to the field of fuel cell technology and discloses a novel open-type series-connected fuel cell cell and stack with a shared cathode. The fuel cell cell comprises two individual cells sharing an integrated cathode plate, connected in series via internal short-circuit tabs. Multiple fuel cell cells are stacked together using inter-cell short-circuit tabs to form a stack, with the cells separated by insulating sealing sheets, achieving a modular design for the fuel cell stack. This invention employs a shared cathode plate design and an open-type series-connected cathode structure, using tab connections and lightweight insulating materials to replace the flat metal plates in traditional open-type metal cathode plate configurations. This significantly reduces the weight of the fuel cell stack and greatly increases the mass power density; simultaneously, it improves the volumetric power density, optimizes gas mass transfer efficiency and sealing reliability, and features a compact overall structure, convenient assembly, and the ability to expand power as needed.

The invention belongs to the technical field of environmental engineering, and discloses a method for improving residual sludge microbial fuel cell biological power generation and sludge stabilization through pre-chlorination, and the method comprises the following steps: adding sodium hypochlorite into residual sludge, and uniformly mixing, so as to pre-chloridize the residual sludge; and then, adding the pre-chlorinated excess sludge into the sludge microbial fuel cell subjected to microbial acclimation, and continuously operating the sludge microbial fuel cell. According to the method disclosed by the invention, the residual sludge is pre-chlorinated by using the sodium hypochlorite, and the concentration of the sodium hypochlorite in the pre-chlorinated residual sludge is strictly controlled to be 0.2 mg / L, so that resource utilization and sludge stabilization of the residual sludge can be realized at normal temperature based on a microbial fuel cell technology. Through the sludge pre-chlorination means, the performance of the microbial fuel cell can be improved, and especially the biological power generation and sludge stabilization efficiency of the microbial fuel cell can be improved.

The utility model provides a converter and a wind generating set comprising the same. The converter comprises a grid-connected cabinet 1000 and a power cabinet 2000 which are arranged side by side, wherein the grid-connected cabinet 1000 comprises a grid-side filter capacitor pool 30, a stator contactor 40, a grid-side circuit breaker 50 and a stator connecting busbar 41 located above the stator contactor 40; the power cabinet 2000 comprises a capacitor pool 300, a power module 400, a network side fuse 51, a machine side reactor 900 and a network side reactor 901. According to the utility model, the internal layout of the converter is more reasonable, the busbars connected on the main loop are not crossed, the length of the busbars is greatly shortened, and the material cost of the busbars is reduced.

The invention relates to a high-power solid oxide electrolysis reactor structure and a module thereof. The high-power solid oxide electrolysis reactor structure comprises a central assembly consisting of an air inlet base, a lower reactor core, a partition plate, an upper reactor core and an end cover which are stacked from bottom to top, the first air inlet side cover, the second air inlet side cover, the first air outlet side cover and the second air outlet side cover are fixed to the outer side of the center assembly. The first air inlet side cover, the second air inlet side cover, the first air outlet side cover and the second air outlet side cover are the same in structure and are respectively provided with a first airflow cavity and a second airflow cavity which are isolated from each other. Four side surfaces of the air inlet base are respectively provided with two buffer cavities which are independently arranged. The lower reactor core and the upper reactor core are respectively formed by stacking a plurality of single battery units, and the partition plate is arranged between the lower reactor core and the upper reactor core. According to the high-power solid oxide electrolysis stack structure and the module thereof, independent gas supply of the upper reactor core and the lower reactor core is realized, uniform gas distribution of each battery channel of the high-power electrolysis stack is ensured, and the volume power density of the electrolysis stack is improved.

The application relates to the technical field of data center liquid cooling, and provides a liquid cooling energy distribution system and a control method thereof. The liquid cooling energy distribution system comprises a case, a primary side loop, a secondary side loop, a heat exchange module, an adjusting module and a control module. The heat exchange module has a flat structure and is internally provided with a plurality of parallel micro flow channels to reduce pressure drop. The actuator of the adjusting module is installed laterally offset in the horizontal direction. The control module is configured to acquire an environmental dew point parameter and a secondary side fluid temperature parameter and monitor the running state of a circulating pump. In response to determining that there is a risk of dewing and the circulating pump reaches a preset lower limit of safety, the control module controls the adjusting module to limit or cut off the primary side flow and maintains the circulating pump to run at the lower limit of safety. The application realizes high-throughput low-flow-resistance heat exchange and dewing prevention self-healing control in a compact space.