Abstract: A method and system for preventing battery thermal runaway are provided. The method includes: detecting or predicting whether there is a thermal runaway risk for each battery cell or battery module of a battery pack; and in response to detecting or predicting that there is a thermal runaway risk for at least one battery cell or battery module of the battery pack, transferring battery energy of the at least one battery cell or battery module to the battery pack or another battery pack as thermal energy or electric energy.

Abstract: A vehicle-mounted device for detecting battery state comprises a controller, a load unit, and a switch unit. The load unit is coupled to the battery, the switch unit is coupled between the battery and the load unit. The controller can control the switch unit to disconnect or connect the battery and the load unit at a predefined frequency. The controller can switch the load unit to generate ripple voltage on the battery, and measure the ripple voltage of each battery cell, an abnormal state of a battery can be determined according to the ripple voltage of each battery cell.

Abstract: Provided in embodiments of the disclosure are a battery heat adjustment circuit and method, a storage medium and an electronic device. The circuit includes a battery pack, the battery pack including at least two battery blocks, and each battery block including one or more battery cells; a first controller, respectively connected to partial battery blocks included in the battery pack, and configured to detect a state of partial battery blocks included in the battery pack and control, based on a state detection result, partial battery blocks included in the battery pack to discharge; and a heat adjustment loop, connected to the first controller, and configured to respectively adjust, by using electric energy released by partial battery blocks included in the battery pack, heat of partial battery blocks included in the battery pack. By means of the disclosure, the problems that heating and heat balance of zones in the battery may not be simultaneously solved in the relevant art is solved.

Abstract: The present disclosure provides an external short-circuit protection apparatus for a lithium ion battery. The external short-circuit protection apparatus for the lithium ion battery includes at least one battery cell and a bus bar, wherein each battery cell is provided with a conductive tab, the conductive tab is adjacent to the bus bar, and under an action of external force, the bus bar and the conductive tab are in contact with or separated from each other to be electrically connected to or disconnected from each other. The bus bar is provided with an elastic bent portion, and under the action of a cover plate, an elastic bent portion of the bus bar and the conductive tab are in contact with or separated from each other to be electrically connected to or disconnected from each other.

Abstract: A vehicle-mounted device for detecting battery state comprises a controller, a load unit, and a switch unit. The load unit is coupled to the battery, the switch unit is coupled between the battery and the load unit. The controller can control the switch unit to disconnect or connect the battery and the load unit at a predefined frequency. The controller can switch the load unit to generate ripple voltage on the battery, and measure the ripple voltage of each battery cell, an abnormal state of a battery can be determined according to the ripple voltage of each battery cell.

Abstract: A method of detecting safe and other states of battery while electric vehicle is being driven controls an inverter to generate ripple current on the battery; ripple voltages of a plurality of battery cells are measured, voltage phase shifts between the battery cells are calculated. The battery can be analyzed as normal or otherwise according to the voltage phase shift between plurality of the battery cells. A vehicle-mounted device and a non-volatile storage medium therein, for performing the above-described method, are also disclosed.

Abstract: A thermal management system includes a refrigerant loop, a motor coolant loop, and a battery coolant loop. The refrigerant loop includes a first refrigerant main-line, a second refrigerant main-line, a first refrigerant branch, and a second refrigerant branch. The first refrigerant main-line includes a compressor, the second refrigerant main-line includes a cabin condenser, the first refrigerant branch includes a cabin evaporator, the second refrigerant branch includes a radiator. The first refrigerant main-line and the second refrigerant main-line selectively communicate with one of the first and second refrigerant branches. The battery coolant loop includes a coolant main-line, a first coolant branch connected to the cabin evaporator, a second coolant branch connected to the cabin condenser, and a third coolant branch. The coolant main-line selectively communicates with at least one of the first to third coolant branches. The battery coolant loop connects to the motor coolant loop in series or in parallel.

Abstract: A thermal management system includes a refrigerant loop, a battery coolant loop, and a motor coolant loop. The refrigerant loop includes a compressor selectively communicating with at least two of a condenser, an evaporator, and a heat exchanger. The battery coolant loop includes a first bypass path connected to the heat exchanger. The motor coolant loop includes a second bypass path connected to the radiator. A valve package includes ten outer ports and eight inner channels. Three outer ports connect to the heat exchanger, one of which being connected to the first bypass path. Two outer ports connect to the power supply system. Two outer ports connect to the powertrain system. Three outer ports connect to the radiator, one of which being connected to the second bypass path. Eight of the ten outer ports selectively communicate with four of the eight inner channels.

Abstract: A thermal management system includes a refrigerant loop, a motor coolant loop, and a battery coolant loop. The refrigerant loop includes a first refrigerant main-line, a second refrigerant main-line, a first refrigerant branch, and a second refrigerant branch. The first refrigerant main-line includes a compressor, the second refrigerant main-line includes a cabin condenser, the first refrigerant branch includes a cabin evaporator, the second refrigerant branch includes a radiator. The first refrigerant main-line and the second refrigerant main-line selectively communicate with one of the first and second refrigerant branches. The battery coolant loop includes a coolant main-line, a first coolant branch connected to the cabin evaporator, a second coolant branch connected to the cabin condenser, and a third coolant branch. The coolant main-line selectively communicates with at least one of the first to third coolant branches. The battery coolant loop connects to the motor coolant loop in series or in parallel.

Abstract: An induction cooker includes a microcrystal panel and at least three temperature sensors scattered on a bottom surface of the microcrystal panel, and the induction cooker is configured to heat a container to be measured. The method includes: obtaining temperature data collected by the at least three temperature sensors and position data of each temperature sensor relative to the microcrystal panel; obtaining an actual position of the container on the microcrystal panel according to the temperature data and the position data; obtaining a preset temperature curve matching the induction cooker according to the temperature data, and extracting a peak value of the preset temperature curve; and calculating an actual temperature of the container to be measured according to the actual position and the peak value.

Abstract: A method comprises: collecting first point cloud data under a static scenario around a target collecting point; building a static background mesh model under the static scenario around the target collecting point according to the first point cloud data; collecting a second point cloud data of a target frame under a dynamic scenario after a dynamic obstacle moves around the target collecting point; annotating the point cloud of dynamic obstacle in the second point cloud data corresponding to the target frame, according to the static background mesh model. Through the technical solution of the present disclosure, it is feasible to automatically annotate the point cloud of the dynamic obstacle, effectively save manpower and annotation time spent in annotating the dynamic obstacle point cloud, and thereby effectively improve the efficiency of annotating the dynamic obstacle.

Abstract: The present invention provides an attention detection method based on a cascade neural network, a computer apparatus, and a computer-readable storage medium. The method includes: obtaining video data, recognizing a plurality of image frames, and extracting a face region of the plurality of image frames; recognizing the face region by using a first convolutional neural network to judge whether a first situation of inattention occurs; and recognizing, if it is confirmed that no first situation of inattention occurs, the face region by using a second convolutional neural network to judge whether a second situation of inattention occurs, where computational complexity of the first convolutional neural network is less than computational complexity of the second convolutional neural network. The present invention further provides the computer apparatus for implementing the foregoing method and the computer-readable storage medium.

Abstract: A UV sterilization device for a container includes a housing, a base, a receiving room formed between the housing and the base, a transmission member symmetrically and rotatably mounted on the base and including a clamp for clamping the container, an extension rod symmetrically mounted on the base and inserting into the container to stretch out and draw back relative to the container along the axial direction of the extension member, a UV sterilization member mounted on the extension member to move with the extension member, and a driving member fixed with the base and including a motor therein. The motor is fixed with the transmission member and the extension member. The motor can drive the transmission member and the container to rotate, and drive the extension member to stretch out and draw back relative to the container along the axial direction of the extension member to further drive the UV sterilization member to disinfect the container.

Abstract: A method for controlling a cooking apparatus includes counting a number of times that an operation temperature of the cooking apparatus exceeds a set temperature within a previous set duration, updating a control parameter corresponding to a current set duration based on the number of times, and controlling a heating device of the cooking apparatus to heat within the current set duration based on the updated control parameter.

Abstract: A roller embossing method for flexible graphite polar plates of fuel cells comprises: (1) adjusting a clearance of an embossing roller pair of a roller press to a target thickness value of a monopolar plate; (2) feeding a flexible graphite slab in front of the embossing roller pair, and entangling the flexible graphite slab by means of opposite rotation of the embossing roller pair; (3) after the slab is entangled, continuing to forward roll the slab for 10-100 mm, and then reversely rolling the slab for 5-90 mm by means of synchronous and opposite rotation of an upper and a lower embossing roller, wherein one time of forward rolling and one time of reverse rolling are referred to as reciprocal rolling; (4) forming a polar plate after several times of reciprocal rolling, and separating the polar plate from the embossing rollers; (5) performing subsequent treatment on the roll-formed flexible graphite polar plate.

Abstract: The present disclosure relates to the technical field of solid waste recycling and fabricated buildings, and provides a solid waste large-mixing-amount concrete prefabricated laminated slab and a preparation method thereof. The solid waste large-mixing-amount concrete prefabricated laminated slab provided by the present disclosure comprises a prefabricated layer and a laminated layer. Transverse grooves and longitudinal grooves are formed in the surface of the prefabricated layer. During application, the grooves can be used for erecting pipelines, the contact area of the prefabricated layer and the laminated layer can also be increased, the combined effect of new concrete and old concrete is improved, the integrity of a floor slab is enhanced, and the effect of improving the overall stress capacity of the floor slab is achieved.

Abstract: The present invention discloses a triple-resonant null frequency scanning antenna, which belongs to the technical fields of the Internet of Things and microwave. The triple-resonant null frequency scanning antenna comprises a circular sector magnetic dipole arranged on a medium substrate, and rectangular notches are symmetrically arranged on a sector patch of the circular sector magnetic dipole. The circular sector magnetic dipole is fixed on the medium substrate by a second shorting pin and third shorting pins, an flared angle of the circular sector magnetic dipole is a first central angle, and two third shorting pins are present and are symmetrically arranged on both sides of the angular bisector of the first central angle.

Abstract: The present invention discloses a sector dual-resonant dipole antenna. Radiation elements of the antenna are two identical sector patches. Two identical rectangular notches can be symmetrically arranged or two identical tuning stubs can be symmetrically loaded on the sector patches at positions deviating from the central axis of the two sector patches. Exciting points are symmetrically arranged on sides of the sector patches close to a central axis. The present invention realizes a wide beamwidth radiation characteristic through a two-dimensional sectorial resonator, and then the notches are arranged or the tuning stubs are loaded at appropriate positions of two arms of the sectorial resonator, and thereby a dual-resonant characteristic can be realized within a working band.

Abstract: A UV sterilization device for a board-type kitchenware includes a base with a driving member being received therein and defining a first motor, a left work-board, a right work-board, with a receiving room being formed between the left and right work-boards for receiving the board-type kitchenware therein, and a UV sterilization module connected to the first motor, longitudinally arranged on the inside of the left and right work-boards and horizontally sliding relative to the left and right work-boards. The first motor is configured to drive the UV sterilization module to slide so as to sterilize the board-type kitchenware received in the receiving room. The present structure not only can have a good disinfection and bactericidal effect on the harmful bacteria, pathogenic bacteria and molds left on the kitchenware with a minimize disinfection time, but also can reciprocate sterilization of the board-type kitchenware to achieve all-round sterilization by simple operation.

Abstract: Multi-solid waste activated concretes with high-silicon iron ore tailings and preparation methods thereof are disclosed. In at least some embodiments, the concrete is prepared from raw materials including 360-380 kg/m3 of a cement, 30-40 kg/m3 of fly ash, 30-40 kg/m3 of a modified ultrafine sand of high-silicon iron ore tailings, 930-950 kg/m3 of a waste stone of tailings, 870-930 kg/m3 of a fine sand of tailings, 160-170 kg/m3 of water, and 4-8 kg/m3 of an additive.