Abstract: A battery pack assembly includes a frame, a composite cold plate and at least one battery cell. The frame includes a tray and exhaust channels communicated with the outside and arranged on two opposite sides of the tray. The composite cold plate is arranged on the tray. The composite cold plate includes a flow passage plate, and a concave rib-convex rib structure is formed on the surface of the flow passage plate. A concave rib is arranged between every two adjacent convex ribs. Cold plate flow passages are defined by concave ribs and the tray, and are communicated with the exhaust channels. The battery cell is arranged on the composite cold plate. Poles of the battery cell face the composite cold plate. A first explosion-proof valve is provided on the side of the battery cell facing the composite cold plate, and is communicated with the cold plate flow passages.

Abstract: A battery pack vehicle includes a tray, a battery core module, and a liquid cooling plate. The tray includes a tray bottom plate connected with tray side beams to form an accommodating space. The battery core module is disposed in the accommodating space and includes battery cores. Each battery core has a first explosion-proof valve. The liquid cooling plate is disposed on the tray bottom plate and between the battery core module and the tray bottom plate, and includes through holes extending through the liquid cooling plate. The battery core module is in contact with a first surface of the liquid cooling plate, and the first explosion-proof valves respectively corresponds to the through holes. The first channel disposed between a second surface of the liquid cooling plate and the tray bottom plate, and each tray side beam includes a second channel being in communication with the first channel.

Abstract: A battery tray assembly includes a tray and an electrically conductive member. The tray includes a mounting space and a detection port, the mounting space is configured to accommodate a battery module, and the tray is configured to be insulated from the battery module. The electrically conductive member is electrically connected to a potential point, at least a first part of the electrically conductive member is disposed inside the tray, and at least a second part of the electrically conductive member is exposed from the detection port and configured to detect whether an electrically conductive medium is present in the detection port.

Abstract: A droplet delivery device includes an ejection channel and droplets outlet, a mesh positioned in the ejection channel and configured to produce an ejected stream of droplets through openings in the mesh, an airflow path in communication with the ejection channel and the mesh, and a heating element positioned in the airflow path.

Abstract: A droplet delivery device includes an ejector bracket including a mesh with a membrane operably coupled to a vibrating member tip that is coupled to an electronic transducer with the membrane between and contacting both the vibrating member tip and the mesh to produce droplets, such as for inhalation by a user of the droplet delivery device.

Abstract: A droplet delivery device includes an ejector mesh communicating with a fluid reservoir via a first pathway that includes wicking material and a second pathway that is free of wicking material with droplets produced by the mesh ejected out of a droplets outlet of the device.

Abstract: A droplet delivery device includes a mesh with a plurality of opening supported by a mesh carrier in the airflow path of the droplet delivery device. The mesh is vibrated by an electronic transducer and produce droplets from a fluid supply with mesh carrier aiding the production of the droplets.

Abstract: A highly reliable and high-precision navigation and positioning method and system for UAV under GPS-DENIED conditions includes: obtaining measurements of inertial sensor and image of binocular camera, extracting and tracking point features of the image, and obtaining altitude value; calculating position and attitude of camera and depth of landmark point based on the parallax and baseline of the binocular camera; fusing the measurement data of the inertial sensor and the binocular camera, and optimizing the data to obtain high-precision position and attitude data; obtaining the altitude value of the ranging radar and performing four-degree-of-freedom position and attitude graph optimization after adding the detected keyframes when repeated occurrence of the UAV at the same location is detected; encapsulating optimized position and attitude data to form a pseudo-GPS signal, inputting the pseudo-GPS signal to the UAV for positioning.

Abstract: A droplet delivery device includes a droplets outlet coupled to a one-piece and removable container assembly, wherein the container assembly includes a mesh and a membrane, and wherein the mesh includes a plurality of openings formed through the mesh's thickness, a reservoir in fluid communication with the container assembly and configured to supply a volume of fluid, and a vibrating member coupled to a power source and positioned to cooperate with the membrane and mesh to generate an ejected stream of droplets through the mesh.

Abstract: Disclosed are a method, an apparatus, a device, and a medium for image recognition via wireless federated learning. The method for image recognition via wireless federated learning includes: obtaining an image to be recognized and an initial image recognition model; adjusting parameters for the initial image recognition model via a preset accelerated mobile federated learning algorithm according to a target momentum factor to obtain a target image recognition model; and recognizing the image to be recognized through the target image recognition model to obtain text information corresponding to the image to be recognized.

Abstract: Provided are a recombinant expression vector for whooping cough antigens, an engineered bacterium and use thereof. The recombinant expression vector for whooping cough antigens comprises a protein expression cassette for pertactin, a gene for resistance screening, and an upstream recombinant nucleic acid fragment and a downstream recombinant nucleic acid fragment of filamentous haemagglutinin gene, wherein the protein expression cassette for pertactin is located between the upstream recombinant nucleic acid fragment and the downstream recombinant nucleic acid fragment of the filamentous haemagglutinin gene, and the upstream recombinant nucleic acid fragment and the downstream recombinant nucleic acid fragment of the filamentous haemagglutinin gene can undergo homologous recombination with the upstream and downstream of the filamentous haemagglutinin gene, respectively.

Abstract: A battery protection bottom plate, a composite protection structure for a battery pack, and a vehicle. The battery protection bottom plate comprises an upper fiber reinforced resin layer, a metal plate, a fiber reinforced resin frame, and a lower fiber reinforced resin layer; the metal plate and the fiber reinforced resin frame are located between the upper fiber reinforced resin layer and the lower fiber reinforced resin layer; the metal plate is located inside the fiber reinforced resin frame; the top surface of the fiber reinforced resin frame is integrally connected to the upper fiber reinforced resin layer; the bottom surface of the fiber reinforced resin frame is integrally connected to the lower fiber reinforced resin layer.

Abstract: The present provides a visual positioning method and system based on a Gaussian process and a storage medium. The method includes: collecting image of surrounding environment and moving trajectory points while traveling (S100); extracting global features and semantic features from images (S200); processing the extracted global features and semantic features and the moving trajectory points according to a preset processing rule to obtain a Gaussian process observation model (S300); and reconstructing a Bayes filtering framework according to the Gaussian process observation model, endowing a current trajectory with an initial position point, and generating a next position point of the current trajectory, the next position point being used for providing a positioning guidance for navigation (S400). An association between a current state and a historical state can be established, so that the accuracy of a predicted next position point is improved, and accurate navigation can be provided for a robot motion.

Abstract: An edge beam for a battery tray, a battery tray, a battery pack, and a vehicle are provided. The edge beam includes an edge beam body. The edge beam body defines a cavity. The edge beam body has a partition portion. The partition portion is located in the cavity. The partition portion is connected between a top wall and a bottom wall of the cavity to partition the cavity into multiple sub-cavities. The multiple sub-cavities are arranged in sequence in a width direction of the edge beam. In a direction from an upper end to a lower end of the edge beam, the partition portion inclines away from the placement groove.

Abstract: The present disclosure discloses a battery pack and a vehicle. The battery pack includes: a battery core; a tray bottom plate, where the tray bottom plate has a pressed area, and the pressed area has an electrode core pressing area; and a side beam, having a side beam body with a supporting portion. In a first direction of the side beam, an orthographic projection of the supporting portion and an orthographic projection of the electrode core pressing area have an overlapping area. In a second direction of the side beam, the orthographic projection of the supporting portion and the orthographic projection of the electrode core pressing area have an overlapping length of M1, and M1 meets the relation formula: 9 mm?M1.

Abstract: Embodiments of the present disclosure provide a bottom tray plate for a battery, a battery tray, a battery pack, and a vehicle. The bottom tray plate includes a main body portion and a turnup portion. The main body portion includes a bottom wall and a side wall. The side wall is arranged around the bottom wall. The side wall and the bottom wall jointly define an accommodation cavity. The accommodation cavity is configured to accommodate a battery. A thickness of the bottom wall is t1, and 1 mm?t1?3 mm. The turnup portion is arranged at an edge of the side wall and arranged around the side wall. A thickness of the turnup portion is t2, and t2>t1.

Abstract: A battery tray assembly includes a tray and an electrically conductive member disposed in the tray. The tray includes a mounting space configured to accommodate a battery assembly, and is electrically isolated from the battery assembly. At least a portion of the electrically conductive member is located in the mounting space. One end of the electrically conductive member is connected to a potential point. When no electrically conductive medium is disposed in the mounting space, the electrically conductive member is configured to provide a first potential signal between the battery assembly and the potential point. When the electrically conductive medium is disposed in the mounting space, the electrically conductive member connects the battery assembly to the potential point through the electrically conductive medium, to provide a second potential signal between the battery assembly and the potential point.

Abstract: A battery tray, a battery pack, and a vehicle are provided. The battery tray includes a tray bottom plate and a frame. The tray bottom plate includes a bottom plate body. The bottom plate body defines a placing slot configured to place a battery core. A bottom wall of the placing slot is provided with a pressed area configured to support the battery core. The bottom plate body is mounted at the frame. The frame has a support portion. The support portion is configured to support the bottom plate body. An orthographic projection of the support portion and an orthographic projection of the pressed area overlap in a height direction of the battery tray.

Abstract: A side beam for a battery tray is provided. The battery tray has an accommodating groove for accommodating a battery core. The side beam includes a first body and a second body. The first body includes a main portion and a supporting portion, and the supporting portion is connected to the main portion and is configured to support the battery core. The second body is fixed to the first body. The second body and the first body are separated workpieces. At least a part of the second body is located on a side of the supporting portion away from the accommodating groove.

Abstract: The present disclosure discloses an edge beam for a battery tray, a battery tray, a battery pack and a vehicle. The edge beam includes: an edge beam body. The edge beam body defines a cavity, and the edge beam body has a partition portion. The partition portion is located in the cavity, and the partition portion is connected between a top wall and a bottom wall of the cavity to divide the cavity into a first sub-cavity and a second sub-cavity. The first sub-cavity and the second sub-cavity are arranged in a first direction of the edge beam in sequence. The first sub-cavity has a cross-sectional area of S1, the second sub-cavity has a cross-sectional area of S2, and S1 and S2 meet the relation formula: 0.8<S1/S2<1.