78results about How to "Save space cost" patented technology

The invention relates to the technical field of education informatization, and discloses a digital teaching resource library intelligent management and application method and system. The method comprises the steps of constructing a digital resource library, constructing a resource application big data analysis model to calculate a resource quality index, a popularity index and an update index, performing intelligent resource sorting and elimination based on the indexes, analyzing the correlation between a user retrieval request and resources, and performing intelligent recommendation. According to the method, efficient management and accurate application of teaching resources are realized, the resource utilization rate and the teaching effect are improved, the storage space and the management cost are saved, and data support is provided for education decision making.

The invention relates to a molten steel slag centrifugal granulation treatment and waste heat recovery system which is characterized in that a slag inlet is formed in the top of a centrifugal granulation bin, a rotating disc and a rotation driving motor are arranged in the centrifugal granulation bin, the rotating disc is arranged below the slag inlet, and the rotating disc is driven by the rotation driving motor; the low-melting-point eutectic metal self-flowing bed waste heat boiler is arranged below the centrifugal granulation bin, a self-flowing bed waste heat boiler heat exchange pipe is arranged in the low-melting-point eutectic metal self-flowing bed waste heat boiler, and low-melting-point eutectic metal is loaded in the self-flowing bed waste heat boiler heat exchange pipe. High-grade waste heat recovery of the high-temperature molten steel slag is achieved, the blank of heat energy recovery of a steel mill is filled up, and energy conservation, emission reduction and carbon reduction of the steel mill are greatly promoted. The two links of centrifugal granulation treatment and waste heat recovery are comprehensively and integrally designed, the structure is simpler and more compact, the efficiency is higher, operation is easy and convenient, the production implementation process is safe, and the device can be applied and popularized in ferrous metallurgy enterprises.

The invention discloses a quick self-cleaning fish bucket culture pond which comprises a fish bucket pond, the fish bucket pond comprises a cylindrical bucket body and an inverted-cone-shaped bucket bottom, a sewage discharge pipe is arranged at the bottom of the inverted-cone-shaped bucket bottom, a water discharge pipe is arranged on the lower portion of the cylindrical bucket body, and a plurality of water pushing pipes are arranged on the outer side of the fish bucket pond. The bottom of the water pushing pipe is connected with an external water inlet pipe, a sewage draining siphon device is arranged in the middle of the fish barrel pool, and an opening is formed in the center of the bottom of the inverted-cone-shaped barrel bottom. Through the design of the cylindrical-conical combined working area of the fish bucket culture pond, the water pushing pipe and the pollution discharge siphon device of the fish bucket pond, fish excrement and residual feed can be quickly sucked, discharged and separated from culture water, and conversion of solid organic pollutants into water-soluble pollutants in the water is greatly reduced; meanwhile, a culture area and a pollutant precipitation and solid-liquid separation area generated in culture are combined into a whole, so that the construction space and the construction cost are greatly saved.

The invention discloses a system and a method for testing thermal cycle characteristics of multidirectional horizontal pipelines of a nuclear power plant, the system comprises a circulating water path and a pressure stabilizing water path, the circulating water path comprises the multidirectional horizontal pipelines (1a, 1b), paired pressure signal detectors (17a, 17b), pipeline heaters (14a, 14b, 14c) and a pipeline heat exchanger (3), and the pressure stabilizing water path comprises a cooling water supply system (18) and a pressure stabilizer (23); the circulating water path is communicated with the pressure stabilizing water path, and the number of the multi-direction horizontal pipelines (1a and 1b) is more than two. The thermal cycle characteristics of the upstream horizontal pipeline, the lateral horizontal pipeline and the downstream horizontal pipeline connected with the main pipeline under the conditions of different temperatures, pressures and volume flows can be researched more effectively, conveniently and accurately, and data support and reference are provided for design optimization of the multi-direction horizontal pipeline of the nuclear power station.

The utility model discloses continuous biological activated carbon filtering equipment for removing microplastics in sewage, and relates to the technical field of microplastic removal and activated carbon. The continuous biological activated carbon filtering equipment comprises a filtering device, a lifting device is arranged at the upper end of the filtering device, the filtering device comprises a box body, and a water inlet and a water outlet are formed in the left end and the right end of the box body respectively. According to the continuous biological activated carbon filtering equipment for the micro-plastics in the sewage, the sewage is input through the water inlet, the water flow path is limited through the baffle, and the granular micro-plastics are adsorbed through the granular activated carbon I, the bentonite and the granular activated carbon II in sequence, so that the treatment capacity is improved; a sliding rod is pressed, the sliding rod drives a spring to be compressed, meanwhile, a sampling pipe is driven to extend into the water treated by the box body for sampling, and a clamping ring is taken down, so that the water in the water outlet is sucked by a water suction pump and flows back through a guide pipe for secondary adsorption, and therefore, the effects of saving space and use cost and improving sewage treatment capacity are achieved. The effect of facilitating sampling detection is achieved.

The invention discloses a stateless multicast method and system based on a multi-layer bloom filter. The method comprises the following steps that: sending equipment divides multicast trees according to a layer sequence, judges the proportion of a forwarding port in all ports of the whole layer for each multicast tree layer, and encodes the layer into a three-layer positive multi-layer Bloom filter (PMBF) or a two-layer negative multi-layer Bloom filter (NMBF) according to the situation, after the multicast tree is coded, the filters form a label according to the hierarchical sequence of the multicast tree, and the label is added into a data packet header to be sent; and the switching equipment receives the data packet, analyzes the label of the data packet header, takes out the byte string of the first filter, deserializes the byte string to construct the filter, selects a query method according to the type of the filter after obtaining the filter, queries all ports in sequence, identifies all ports needing to be forwarded based on a query result, and forwards data. According to the stateless multicast method, the occupied space of the data packet header is low, and the stateless multicast method is almost lossless.

The invention discloses a solid state disk storage wear leveling control method and device, and relates to the field of solid state disk wear leveling control, and the method comprises the steps: screening out a plurality of first target blocks which are not accessed in a solid state disk within a preset time threshold value, and determining the corresponding access times; obtaining storage data and residual capacity of the first target block with the access times smaller than a first preset threshold value; integrating all the target blocks according to the storage data and the residual capacity to obtain a plurality of second target blocks; and migrating the data in the second target block to a third target block of which the access frequency is between the first preset threshold value and the second preset threshold value. By implementing the method, data storage can be dynamically adjusted according to the access frequency of the data block, cold data which is not accessed for a long time is integrated and migrated, the problem that local abrasion is aggravated due to the access frequency difference is solved, and the service life of the solid state disk is prolonged.

The stacking device for food additive processing comprises a plurality of bottom placing frames and a top placing frame, a plurality of placing plates are fixed in the bottom placing frames and the top placing frame, a plurality of grooves are formed in the placing plates, stacking plates are placed on the upper sides of the placing plates, the stacking plates correspond to the grooves, and the stacking plates are arranged in the grooves. And anti-falling assemblies are arranged on the stacking plates, sliding rails are arranged on the side faces of the bottom containing frame and the top containing frame correspondingly, stacking moving assemblies are arranged on the sliding rails in a sliding fit mode, and the stacking moving assemblies correspond to the grooves. According to the food additive stacking device, the containing plates are installed in the bottom containing frame and the top containing frame, the stacking plates are placed on the containing plates, the anti-falling assemblies are installed on the stacking plates, food additives on the stacking plates can be prevented from falling off, the sliding rails are installed on the side faces of the bottom containing frame and the top containing frame, and the stacking moving assemblies are driven to move through the sliding rails; therefore, the stacking plate and the food additives can be driven to move up and down.

The invention relates to a vacuum system in a pulse power device, and provides a magnetic insulation induced voltage superposition device with axial vacuum degree consistency in order to solve the problems that an existing vacuum system cannot reach a target vacuum degree and is poor in uniformity, the magnetic insulation induced voltage superposition device comprises a cantilever supporting section, a plurality of groups of induction cavities and an isolation extension section which are coaxially connected in sequence, the vacuum cavity assemblies and the vacuum pump assemblies are arranged between the connecting ends; the vacuum cavity assembly comprises a vacuum cavity and a connecting cylinder, and the connecting cylinder is used for connecting the vacuum cavity assembly to the connecting ends in an inserted mode. A plurality of interface flanges are arranged on the outer side circumferential surface of the vacuum cavity, and a plurality of through holes are formed in the outer side circumferential surface of the connecting cylinder in the radial direction; the vacuum pump assembly comprises a plurality of molecular pumps, a vortex dry pump, a pre-pumping valve and an isolating valve, the molecular pumps are connected with the vacuum cavity through interface flanges, one end of the vortex dry pump is connected with the vacuum cavity through the pre-pumping valve, the other end of the vortex dry pump is connected with the molecular pumps through the isolating pump, and the vortex dry pump is used for controlling the molecular pumps to perform high vacuum pumping treatment.

The invention discloses an oil pump system of a two-channel EUC controller, and relates to the field of oil pump control, in order to achieve the purpose, according to the technical scheme, the oil pump system comprises an oil pump and a controller; the two oil pumps are located in the oil tank, the output ends of the two oil pumps are communicated to a header pipe, the header pipe is communicated to an oil rail, the controller is electrically connected with the two oil pumps, and the controller is connected to an ECU through a CAN bus cable. The controller is electrically connected with the two oil pumps, control over the two oil pumps is achieved through control logic, and more space and manufacturing cost are saved.

This utility model relates to the field of display rack technology and discloses a foldable promotional display rack, including two first support plates and two second support plates. Each of the two first support plates has a limiting block rotatably mounted on an opposite side. Each limiting block has a slider rotatably mounted near its front end on an opposite side. Each of the two second support plates has a sliding groove on an opposite side. Each of the two second support plates has a first bolt threaded to its lower front end. Each of the two first support plates has multiple first folding blocks rotatably mounted on an opposite side, and each of the two second support plates has multiple second folding blocks rotatably mounted on an opposite side. In this utility model, the foldable design of the promotional display rack significantly reduces its volume when not in use, saving space in both warehousing and transportation. This not only reduces the company's operating costs but also facilitates flexible deployment in different locations, quickly adapting to diverse promotional scene layout needs.

This invention belongs to the field of photovoltaic automation technology and discloses a robotic pre-static curing warehouse. It includes several stationary positioning racks evenly distributed around the circumference, with a transport robot positioned at the center. The circular warehouse area formed by the stationary positioning racks has four directional channels for crystal tray / adhesive plate input rollers, crystal rod input rollers, cured material output rollers, and a maintenance channel. The transport robot has a multi-functional gripper at its end. The robotic pre-static curing warehouse solves the problems of long adhesive curing time, the need for material transfer after alignment, and low precision after bonding in existing technologies, while also improving space utilization and accelerating production cycle time.

The utility model discloses a water filter which comprises a water inlet header pipe, a water outlet header pipe and a plurality of tank bodies, water inlet branch pipes are connected to the upper ends of the tank bodies, the upper ends of the water inlet branch pipes are connected with the water inlet header pipe, water inlet electromagnetic valves are arranged on the water inlet branch pipes, water outlet branch pipes are connected to the upper portion of the water outlet header pipe, and the upper ends of the water outlet branch pipes extend into the tank bodies and are connected with filters. The side face of the tank body is connected with a drainage pipe which is provided with a drainage electromagnetic valve. According to the utility model, water can be effectively filtered.

The embodiment of the specification discloses a high-imitation fake certificate detection method, comprising: acquiring multiple frames of certificate images under different environments collected by a client; performing block division on each frame of certificate image respectively by using the same division mode; performing feature extraction on each block in each frame of certificate image to obtain block features corresponding to each block respectively; performing spatial coding on the features of each block according to the position of each block in the certificate image to obtain spatial features corresponding to each block in the certificate image; for each position divided in any certificate image, performing time coding on the spatial features of the blocks located at the position in different frames of certificate image to obtain space-time features corresponding to the position, so as to represent the changes of the part in the certificate located at the position under different environments; and judging whether the certificate is a fake certificate according to the space-time features corresponding to each position respectively. Accordingly, the application discloses a high-imitation fake certificate detection device.

The invention discloses a tailstock type vertical take-off and landing aircraft with foldable outer-section wings and a design method of the tailstock type vertical take-off and landing aircraft, the outer-section wings can be folded and unfolded by matching a folding and unfolding driving mechanism with a four-bar mechanism, and the weight brought by a folding device is reduced on the premise of ensuring driving force and maintainability; when the wings are completely folded, the aircraft is in a four-rotor state, and when the wings are completely unfolded, the aircraft is in a fixed-wing state; the folding and unfolding of the wings give consideration to the conversion of the flight form, and the folding of the outer-section wings is realized on the premise of ensuring the reasonable gravity center and inertia of the fixed wing state and the rotor wing state at each folding and unfolding angle through the reasonable configuration of the gravity center of each shaft of the vertical take-off and landing aircraft, so that the space cost of the aircraft is reduced.

The utility model discloses a flue gas desulfurization and dust removal filter, and relates to the technical field of flue gas treatment equipment. The device comprises a shell, a fixing block, a water conveying cavity and a top shell, the water conveying cavity is fixed to the lower portion of the inner wall of the shell, a spiral plate is fixed to the bottom end of the water conveying cavity, the end of an outer ring of the spiral plate is fixed to the inner wall of the shell, an air inlet pipe is fixed to the position, below the water conveying cavity, of the shell in a penetrating mode, and the fixing block is fixed to the position, above the water conveying cavity, of the inner wall of the shell. A top shell is arranged at the top end of the water conveying cavity, a second annular mounting ring is fixed to the bottom end of the top shell, a filtering disc is fixed to the bottom end of the second mounting ring, and the diameter of the filtering disc is equal to the inner diameter of the shell. By arranging the outer shell, the fixing block, the water conveying cavity and the top shell, the problems that the adsorbent replacement period is short, the treatment cost is high in the flue gas treatment process, the flue gas can be discharged only after being filtered after being subjected to adsorption treatment, a plurality of devices are needed to be matched, and the space cost of the devices is high are solved.

The utility model relates to the technical field of diammonium phosphate production, specifically relates to a kind of diammonium phosphate uniform dispersion cooling equipment, including workbench main body, the top of the workbench main body is fixedly connected with breaker, the front end of the breaker is fixedly connected with hopper, the front end of the workbench main body is fixedly connected with cooling tank, the inside of the cooling tank is equipped with first cooling assembly, the bottom of the cooling tank is fixedly connected with discharge pipe, the outside of the discharge pipe is equipped with second cooling assembly, compared with the existing cooling equipment, rotating rotating plate is like a group of broom or beater, falling, possibly caking diammonium phosphate material is constantly scattered, scraped flat, prevent its accumulation in tank over-thickness or form dead zone, greatly increase the surface area and fluidity of material, three major functions of stirring, crushing, cooling are integrated on a rotating body, compact structure, without additional configuration stirring motor and complex air duct system, save space and manufacturing cost.

The present invention proposes a decoupling capacitor optimization selection method and system, which does not need to be adjusted according to the simulation results each time, but directly selects all decoupling capacitors quantitatively according to the optimization selection strategy, directly achieves the optimization target in the selection process, and does not need to be optimized after selection. The overall calculation amount is small and easy to quantify; combined with the frequency domain characteristics of the PDN impedance curve, the corresponding decoupling capacitors are quantitatively selected through analysis and calculation, and the decoupling capacitor parameters and the layout rules and position distribution of the capacitors on the PCB board are determined by simulating and analyzing the resonant characteristics of the circuit board, so as to achieve the ideal decoupling effect with a small number of capacitors. The optimization selection method of the present invention can quantitatively select decoupling capacitors according to the PDN impedance characteristics, control the number of decoupling capacitors within the minimum range, and achieve the ideal decoupling effect. At the same time, the layout on the board is optimized, the influence of the distribution parameters on the PDN performance is reduced, and the circuit board space and engineering costs are saved.

The utility model relates to the field of pneumatic connector suite feeding devices, in particular to a pneumatic connector assembly machining suite feeding device, and solves the technical problems that pneumatic connector sealing rings are uniformly fed by a conveying machine after being packaged, and irreversible deformation is easily generated due to mutual collision and extrusion of the sealing rings during tight packaging and transportation. The sealing performance of the assembled pneumatic joint is reduced; according to the technical scheme, the pneumatic connector assembling and machining suite feeding device comprises a feeding box body, a cooling fan structure, a sliding loading and unloading table assembly, a sliding loading and unloading strip assembly, a sealing ring fixing assembly, a linear motor and a transverse conveying assembly, the feeding box body is a box body with doors on the two sides, and the sliding loading and unloading table assembly is arranged on a bottom plate of the feeding box body; a sliding loading-unloading strip assembly is arranged on the upper surface of the sliding loading-unloading table assembly; the sealing ring is connected to the outer side of the columnar rod in a sleeving mode through the sealing ring fixing assembly, irreversible deformation caused by scattered stacking and extrusion of the sealing ring is prevented, and the sealing performance of the sealing ring is improved.

The high-bearing rod and wire coupler comprises a first spline shaft and a second spline shaft, a connecting assembly is arranged between the first spline shaft and the second spline shaft, and supporting mechanisms are arranged at the opposite ends of the first spline shaft and the second spline shaft; the other end of the first spline shaft is connected with a tooth end assembly, the other end of the second spline shaft is connected with a roller end assembly, and a clutch is installed on the second spline shaft. The supporting mechanism comprises two supporting assemblies, a lifting assembly and a buffering assembly, the two supporting assemblies are connected to the opposite ends of the first spline shaft and the second spline shaft, and the buffering assembly is connected to the lower end of the lifting assembly; the coupling can be lengthened, the coupling is made to adapt to the installation distances of different devices, the installation adaptability of the coupling is improved, the supporting mechanism can support the first spline shaft and the second spline shaft, transmission is stable during high-speed operation, and the problems of shaking and vibration are reduced.

The utility model discloses a kind of efficient multi-layer three-dimensional blue algae culture light reactor devices, belong to blue algae culture technical field, including the modularization support frame consisting of left stand, middle stand and right stand, bottom plate, side plate and end plate are provided on the modularization support frame, a culture container is formed by multiple groups of bottom plate, side plate and end plate, PH / temperature / OD sensor is provided on each layer culture container, middle stand includes four groups of stand column, multiple groups of cross bars are provided on four groups of stand column, every two groups of cross bars are arranged in pairs, side stand is further fixedly connected between two groups of stand column, LED dimming light source is provided in the bottom of multiple groups of cross bars, the utility model, through the multiple groups of stand and culture container set, modularization blue algae culture can be realized, while multi-layer setting can save the placing space of culture device, save space cost, finally through the support column set, the bottom plate of middle position can be well supported, reduce its deformation to the influence of leakage performance.

The utility model relates to a plastic additive master batch production raw material grinding device which is characterized in that the upper end of a supporting plate is coaxially and fixedly connected with a conical shell, the upper end of the conical shell is integrally and coaxially provided with a feeding hopper, the upper end of the supporting plate is fixedly connected with a rack, the rack is vertically and slidably connected with a connecting rod, and the connecting rod is fixedly connected with the conical shell. The mounting frame is rotatably connected with a vertical shaft, the mounting frame is fixedly connected with a motor used for driving the vertical shaft, the adjusting rod is integrally and coaxially provided with a screw rod in threaded connection with the connecting rod, the supporting plate is coaxially and rotatably connected with a short shaft, and the lower end of the vertical shaft is coaxially and fixedly connected with a conical grinding roller; two symmetrically-arranged vertical grooves are formed in the inner wall of the connecting hole, the guide blocks and the vertical grooves are in one-to-one correspondence and are in sliding connection, the short shaft is coaxially and fixedly connected with a baffle disc, the baffle disc is coaxially and fixedly connected with the lower end of a supporting spring, the upper end of the supporting spring abuts against the bottom face of the conical grinding roller, and a discharging device is arranged at the bottom of the conical shell.

According to the technical scheme, the mold for the extruded and puffed pet snacks is characterized in that the mold comprises an installation frame, a plurality of universal wheels are fixedly installed on the bottom face of the installation frame, a mold base is fixedly installed on the top face of the installation frame, and a mold barrel is arranged in the mold base; the shaping assembly is arranged in the mold barrel and used for shaping the shape of the pet snacks, by arranging the inner mold ring, when the device is used, in the process that the device is pushed to the position below an extruding machine, and the pet snacks are pressed and puffed, the special shape can be produced through the inner mold ring and the outer mold ring, and when the shape of the pet snacks needs to be changed, the shaping assembly is used for shaping the shape of the pet snacks. An operator can easily replace the inner mold ring or the outer mold ring only by screwing off the fixing bolts, various shaping effects are achieved through different combinations of the inner mold ring and the outer mold ring, the purchase cost of the mold is reduced, and the storage space and the maintenance cost of the mold are further saved.

The present invention relates to a model construction method and training method for multi-task language recognition, including: using an unsupervised pre-training method to perform a first pre-training on a wav2vec model; establishing a training sample set containing multi-language sample data according to task requirements including language recognition and data effective recognition; using sample data in the training sample set to perform a second pre-training on the wav2vec model pre-trained for the first time; adaptively fine-tuning the wav2vec model pre-trained for the second time according to the task requirements to construct a final multi-language recognition model; and using sample data in the training sample set to train the multi-language recognition model again, so that the multi-language recognition model can simultaneously recognize the language and voice effectiveness of input voice data. The present invention realizes the simultaneous recognition of two tasks, language recognition and effective voice recognition, and improves the accuracy and recognition efficiency of language recognition.

The utility model discloses a combined switch chest blocking handle structure. The structure comprises a handle; the circuit board is arranged in the handle, the needle guide row and the microswitch are arranged on the circuit board and are adjacent to each other in the axial direction of the handle, and movable conductive pieces are arranged on the side, opposite to the microswitch, of the needle guide row at intervals; the button component is arranged at the end of the handle in a sliding mode and comprises a button, a first push rod and a second push rod, the first push rod and the second push rod are connected with the button into a whole, the second push rod is higher than the first push rod, penetrates through the needle guide bar and is matched with the trigger rod of the microswitch in an abutting mode, and the first push rod is matched with the conductive piece in an abutting mode; when the second push rod abuts against the trigger rod to move downwards to start the microswitch, the conductive piece makes contact with and conducts the pin guiding row. The EPB function and the P-gear function can be achieved at the same time in the narrow space layout, so that internal parts of the gear handle are reduced, the cost is saved, and user operation is facilitated.

The invention relates to the technical field of light-emitting semiconductors, and particularly discloses a high-uniformity pixel type packaging module structure and a manufacturing method thereof, and the structure comprises a substrate, a light-emitting assembly, an electric appliance assembly, a packaging glue layer, and a light blocking wall. The multiple light-emitting assemblies are arranged on one side of the base plate at equal intervals, and the electric appliance assembly is arranged on the other side of the base plate. The packaging adhesive layer is arranged on the side, provided with the light-emitting assemblies, of the substrate, and the packaging adhesive layer covers the light-emitting assemblies; the light blocking walls are arranged above the packaging adhesive layer, the multiple sets of light blocking walls are arranged at equal intervals, and the multiple sets of light blocking walls and the multiple light emitting assemblies are mutually staggered. Through the design of the light-emitting assemblies arranged at equal intervals and the multiple sets of light blocking walls arranged at equal intervals and staggered with the light-emitting assemblies, light crosstalk between the light-emitting assemblies is effectively prevented.

The utility model relates to the technical field of police equipment, especially a foldable self-locking handle for arm shield. Including handle, side ear and base, the base contains bottom plate, pin shaft, bearing, side ear is sleeved on pin shaft, pin shaft is fixed between bearings, bearing is fixed in bottom plate, pin shaft is sleeved spring, side ear sets up square pivot and bearing square axle hole cooperation self -lock, bottom plate has screw thread mounting hole. Can solve the problem that the conventional arm shield handle is inconvenient to store, realizes folding self -lock, still can improve the use experience through various structure design, such as handle sets up blocking ring, cover rubber cotton etc, has simple structure, convenient to use, convenient to store and so on, is applicable to the arm shield equipment field of police.

The application relates to a MOS structure for automobile starting, a manufacturing method and an automobile starting system, which comprises a base island, a first MOS tube and a second MOS tube arranged on the base island, and a plastic sealing body for sealing the base island, the first MOS tube and the second MOS tube, the gate of the first MOS tube is connected with the gate of the second MOS tube, and the drain of the first MOS tube is connected with the drain of the second MOS tube. The application has the effects of saving space, reducing cost and reducing internal resistance.

The invention discloses a single battery and a battery pack, and belongs to the technical field of power batteries, the single battery comprises a battery body, a first shell and a first hollow part, the battery body has a first direction, a second direction and a third direction which are intersected with one another, and the first shell covers the battery body; the first hollow part penetrates through the battery body and the first shell along a first direction and is connected with the first shell; the first hollow part comprises two first connecting plates and two second connecting plates; the two first connecting plates and the two second connecting plates in the first hollow part are connected end to end at intervals to form a frame-shaped structure, and the frame-shaped structure penetrates through the battery body and the first shell and is connected with the first shell to form a concentric-square-shaped structure for accommodating the battery body. The rectangular-ambulatory-plane structure is matched with the cooling plate, so that the two first connecting plates can be cooled by the single cooling plate, the heat dissipation area of the single battery is increased, and the cooling effect is improved.