975 results about "Electrical devices" patented technology

The invention discloses a GIS partial discharge intelligent diagnosis system and method based on one-dimensional ultrahigh frequency signal analysis, and relates to the technical field of power electrical equipment intelligent monitoring, and the system comprises a signal collection and preprocessing module which is used for collecting ultrahigh frequency signals of GIS equipment and obtaining preprocessed signal data through a dynamic threshold algorithm; the discharge initial judgment module is used for performing multi-dimensional sequential judgment to eliminate interference discharge data so as to obtain effective discharge signal data; the feature extraction module is used for performing time domain kurtosis and pulse width analysis, frequency domain energy distribution analysis and time-frequency domain wavelet entropy calculation based on the multi-dimensional features of GIS partial discharge, and generating an optimized feature subset; and the type identification module is used for identifying the partial discharge type by using the integrated learning model to obtain a diagnosis result. According to the invention, the problem of unstable recognition accuracy caused by insufficient signal preprocessing, single feature representation and single classification algorithm in the prior art is solved.

The invention discloses an electrical equipment operation state monitoring method, system and terminal, full life cycle health management of equipment is realized through multi-dimensional perception and intelligent analysis, a composite sensor network can be constructed from the level of the method, and high-frequency current, ultrahigh frequency, fiber grating temperature vibration, multi-parameter gas and acoustic sensors are integrated. Electromagnetic characteristics, mechanical states, environmental parameters and voiceprint characteristics are covered; the adaptive signal processing technology performs classification and noise reduction on multi-source data, and the three-dimensional digital twin model realizes time-space fusion of a temperature field, a vibration field, an electric field and a sound field; a lightweight space-time convolutional network is deployed to fuse a time domain waveform, a spectrogram and spatial distribution characteristics for diagnosis, and a hidden semi-Markov model and a particle filter algorithm are combined to dynamically predict the residual service life of equipment. The system architecture comprises a self-organizing sensor network with edge computing capability, a time-sensitive industrial communication network and a containerized analysis engine, and supports mixed reality visual interaction.

The invention discloses an electrical fire real-time monitoring system based on a wireless sensor network, and relates to the technical field of electrical fire monitoring. The cloud monitoring platform is in communication connection with an electrical data acquisition module, an electrical fire abnormity analysis module, an abnormity early warning module, a node management configuration module and a visual monitoring module, and all the modules are in electric signal connection; the electrical data acquisition module is used for acquiring monitoring data of electrical nodes by using a deployed wireless sensor and transmitting the monitoring data to the cloud monitoring platform through a wireless communication technology, and the monitoring data comprises current, voltage, temperature, humidity and leakage current. Multi-parameter fusion monitoring is carried out through the wireless sensors deployed at the key nodes of the electrical equipment, compared with a traditional wired sensor, the wireless sensors do not need wiring, installation is flexible, early signals of an electrical fire can be captured more comprehensively, and the accuracy of fire early warning is remarkably improved.

The invention provides a distribution network electrical equipment defect identification method based on image voiceprint multi-modal data. Comprising the following steps: constructing an image complex mapping model according to a mapping relation between a light distribution signal and a light source position and a light source light intensity, and establishing first relation knowledge among background light intensity, local light intensity change polarity, absolute brightness change and equipment internal defect characteristics; constructing a voiceprint complex mapping model according to the mapping relationship between the voiceprint signal and the internal defect feature of the equipment, and establishing second relationship knowledge between the local sound pressure change polarity, the frequency change, the absolute sound pressure change and the internal defect feature of the equipment according to the voiceprint complex mapping model; and constructing an electrical equipment defect identification model according to the image complex mapping model, the first relation knowledge, the voiceprint complex mapping model and the second relation knowledge, and identifying the defect of the distribution network electrical equipment by adopting the electrical equipment defect identification model. The problem that an existing equipment defect identification method is low in defect identification accuracy is solved.

The invention relates to a secondary battery, a positive electrode active material, and a power device. The secondary battery comprises a positive pole piece, the positive pole piece comprises a positive active material, the positive active material comprises secondary particles, and the secondary particles are agglomerated particles comprising a plurality of primary particles; the primary particles comprise a positive electrode active material; in any secondary particle, the direction of the center of the secondary particle towards the surface is recorded as the X direction; the X direction penetrating through the center of any one primary particle is marked as the longitudinal direction; in any one primary particle, the longest axis of the primary particle is recorded as an a axis; the secondary particles comprise oriented secondary particles; in the oriented secondary particles, based on the total number of the primary particles in the oriented secondary particles, the proportion of the number of the primary particles in the oriented secondary particles, in which an included angle alpha 1 is formed between the a axis and the longitudinal direction, is F1, 15 degrees < = alpha < = 45 degrees, and F1 > = 60%. The secondary battery has high energy density, good dynamic performance and long cycle life.

The invention provides a GIS partial discharge positioning method based on multichannel signal processing, and relates to the field of fault diagnosis of high-voltage electrical equipment, and the method comprises the steps: S1, collecting multichannel electromagnetic wave signals generated by partial discharge through a plurality of ultrahigh frequency sensors distributed in GIS equipment; s2, preprocessing the collected electromagnetic wave signal, including noise suppression and time difference calculation; s3, based on the time difference and amplitude information of the multi-channel electromagnetic wave signals, calculating the position of a partial discharge source by adopting a fusion algorithm and combining a double-end positioning formula; and S4, displaying the position and the discharge intensity of the partial discharge source through the monitoring host, and generating a related diagnosis report. According to the invention, precise positioning of the partial discharge source in the GIS equipment can be realized, so that the positioning precision and the anti-interference capability are improved, and safe operation and maintenance of the GIS equipment are ensured.

The invention provides a secondary battery and a power utilization device, the secondary battery comprises a negative pole piece, and the negative pole piece comprises a negative current collector and a negative film layer which is located on at least one surface of the negative current collector and comprises a negative active material. The negative electrode active material comprises a first carbon-based material and a second carbon-based material, the first carbon-based material comprises an outer region and an inner region located on the inner side of the outer region, and the outer region is a region formed by extending the particle surface of the first carbon-based material to the interior of the particle by a distance of 2.5 [mu] m; in a sectional view of the first carbon-based material, the total pore area of the outer region is recorded as S1, and the total pore area of the inner region is recorded as S2, and S2gt; s1, and the graphitization degree of the first carbon-based material is greater than the graphitization degree of the second carbon-based material. The secondary battery provided by the invention has excellent cycle performance and dynamic performance while having high energy density.

An adaptive IoT power plug system for intelligent load management and remote control, consisting of: a power plug housing configured to be inserted between a power outlet and an electrical appliance; an embedded sensor array comprising at least one voltage sensor, at least one current sensor, and at least one power sensor and configured to continuously monitor the electrical parameters of the connected device; a microcontroller unit (MCU) operatively coupled to the sensor array and configured to execute a load prioritization technique that dynamically determines power allocation based on real-time consumption data and user-defined priority levels for one or more connected loads; a semiconductor switching module electrically connected to the MCU and configured to selectively interrupt or modulate the power supply to the connected device based on commands from the load prioritization technology; a wireless communication module integrated into the MCU for bidirectional data exchange via at least one wireless protocol selected from Wi-Fi, Zigbee or Bluetooth Low Energy; a user interface that can be accessed remotely via a mobile or web application and enables the configuration of load priorities, real-time monitoring of power consumption, scheduling of device operation, and manual override of switching commands; and a power management subsystem including a power harvesting module configured to provide supplemental power to the system's electronic components, thereby reducing dependence on the main power source; The system autonomously adjusts the power distribution between multiple connected devices to load fluctuations and predefined user priorities in order to optimize energy efficiency and prevent overloading of the circuit.

The invention relates to a wireless intelligent electrical equipment networking and cooperative control method and system, equipment and a readable storage medium. According to the method, a heterogeneous wireless communication network is constructed, implicit channel conflicts caused by multi-protocol signal superposition are detected in real time, a channel backoff window is dynamically optimized in combination with global interference characteristics of a device node topological graph and a reinforcement learning algorithm, and a time slot allocation strategy is optimized through a dynamic optimization algorithm. Finally, cooperative control of a multi-protocol device group in a high-density scene is achieved, the problem of channel competition conflicts caused by the fact that cross-protocol signals cannot be sensed in a traditional method is effectively solved, communication reliability and real-time performance of device cooperative control are remarkably improved, meanwhile, the device operation state is automatically adjusted according to scene requirements, and the method is suitable for large-scale popularization and application. And the technical effect of optimizing the overall efficiency of the system is achieved.

The invention discloses a method and equipment for determining a wiring state and a storage medium. The method comprises the following steps: receiving target image data containing image information at a wiring position, performing target detection and feature extraction processing on the target image data, automatically identifying a connecting element (a first target) and an identifier (a second target) thereof in an image, and simultaneously extracting an appearance visual feature (a first feature) of the connecting element and an identification code feature (a second feature) of the identifier; and performing topology construction processing based on the obtained target and characteristics to generate topological graph data capable of accurately representing the connection relationship of the electrical devices. And finally, comparing the topological graph data with a preset standard wiring template topological graph, and automatically generating judgment information for indicating whether the wiring connection state is correct or not according to a topological matching result. Therefore, misjudgment caused by artificial fatigue, negligence and experience difference is effectively avoided.

The present application relates to a battery module, a battery and an electrical device. The battery module includes a plurality of battery cells, a buffer mechanism and a busbar. The plurality of battery cells are arranged along a first direction; the buffer mechanism is provided at at least one end of the plurality of battery cells along the first direction; the busbar is provided at at least one side of the plurality of battery cells along a second direction, and the pole ears of each battery cell are connected to the busbar, and the second direction intersects with the first direction; wherein the busbar has a guide portion, and the guide portion is movably connected to a portion of the buffer mechanism along the first direction. The busbar in the battery module can guide part of the buffer mechanism to speed up the movement speed of the buffer mechanism along the first direction when it is subjected to an external force. In this way, there is no need to provide additional guide members, which reduces the number of components required in the battery module and speeds up the assembly efficiency of the battery module.

The invention provides a secondary battery and a power utilization device. The secondary battery comprises a negative electrode piece, the negative electrode piece comprises a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector, the negative electrode film layer is provided with a first surface away from the negative electrode current collector and a second surface opposite to the first surface, and the thickness of the negative electrode film layer is marked as H, the area from the first surface of the negative electrode film layer to the thickness range of 0.3 H is marked as the first area of the negative electrode film layer, the area from the second surface of the negative electrode film layer to the thickness range of 0.3 H is marked as the second area of the negative electrode film layer, the first area comprises a first negative electrode active material, and the second area comprises a second negative electrode active material; the first negative electrode active material comprises a substrate and a carbon coating layer formed on at least part of the surface of the substrate; the lithium insertion platform voltage of the first negative electrode active material is 0.118-0.140 V, and the gram volume of the second negative electrode active material is greater than that of the first negative electrode active material.

The embodiment of the utility model provides an insulating part for coating a battery cell, an electrode assembly, a battery monomer, a battery and a power utilization device, and the insulating part comprises a middle folding sheet which is provided with a positioning hole; the first folding sheet is connected with the middle folding sheet at a first folding line, and the first folding sheet comprises a first main folding sheet and a side folding sheet connected with the first main folding sheet at a third folding line; the extension sheet is connected to one end, close to the middle folding sheet, of the side folding sheet at the fourth folding line; the second folding sheet is connected with the middle folding sheet at a second folding line; wherein the middle folding sheet is configured to cover the bottom of the battery cell, the first folding sheet and the second folding sheet are configured to cover the circumferential side part of the battery cell after being folded, and the extension sheet is configured to completely cover the positioning hole. The insulating part can prevent the battery cell from being in contact with the shell and can receive active substances falling from the pole piece of the battery cell, so that electrochemical corrosion of the shell is avoided.

The invention discloses a secondary battery and a power utilization device, and belongs to the technical field of batteries. A first positive electrode active material layer and a second positive electrode active material layer are sequentially arranged on at least one surface of a positive electrode current collector; a first additive and a second additive are respectively added into the first positive electrode active material layer and the second positive electrode active material layer, and the electronic conductivity of the first positive electrode active material layer close to the positive electrode current collector is higher by controlling the ranges of y1, z1, y2 and z2 in the first additive and the second additive; and the ionic conductivity of the second positive electrode active material layer far away from the positive electrode current collector is higher, so that the transmission of electrons and ions is facilitated, and the rate capability and the cycle performance of the secondary battery are effectively improved.

The utility model provides an electrical device with a switch panel, which comprises a key assembly, a mounting seat and a switch assembly, the key assembly comprises a key piece and a supporting seat, the key piece comprises a pressing body, the pressing body is provided with a pressing part, the key body is rotatably connected to the supporting seat, and the mounting seat is arranged on one side of the supporting seat away from the key body. One of the mounting seat and the supporting seat is provided with a connecting hole, the other one of the mounting seat and the supporting seat is provided with a connecting column, the connecting column is fixed in the connecting hole, so that the mounting seat is non-detachably connected to the supporting seat, the switch assembly is mounted on the mounting seat, and the key piece moves close to or away from the switch assembly in response to the pressing of the pressing part, so that the on-off state of the switch assembly is switched. The electrical device with the switch panel provided by the utility model is beneficial to reducing the failure of a product and improving the use safety of the product.

1. The name of the product of this design: electrical connector. 2. Purpose of the product with this design: The product with this design is an electrical connector used to connect this product with the electrical connector on the corresponding side in electronic and electrical devices. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: Stereoscopic diagram 1. 5. Other matters that require explanation Other explanations: The thin lines shown in "Reference FIG. 1" to "Reference FIG. 4" are all ridges used to determine the shape of a three-dimensional surface.

The invention is applicable to the field of batteries, and provides an electrode assembly, a battery monomer, a battery and a power utilization device, the electrode assembly comprises a first pole piece and a diaphragm, the diaphragm comprises two diaphragm layers formed by folding, and the two diaphragm layers respectively cover two opposite ends of the first pole piece along the thickness direction; each diaphragm layer is provided with a first edge part exceeding the end part of the first pole piece along the width direction of the first pole piece, the first edge parts are opposite to the folding ends of the diaphragms, and the first edge parts of the two diaphragm layers are connected with each other to form a first joint part. According to the electrode assembly provided by the embodiment of the invention, the problem of short circuit of the adjacent pole pieces caused by turnover of the diaphragm can be solved.

The invention provides a battery monomer, a battery, a power utilization device and an energy storage cabinet, and belongs to the technical field of batteries. A battery cell includes a housing, a first electrode terminal, a first current collecting member, and a plurality of electrode assemblies. The housing has a wall portion. The first electrode terminal is attached to the wall portion. The plurality of electrode assemblies are accommodated in the shell, the plurality of electrode assemblies are stacked along a first direction, each electrode assembly comprises a main body part and a first tab, the first tab is arranged at one end of the main body part along a second direction, the first tabs of the plurality of electrode assemblies are positioned at the same end of the main body part, and the second direction intersects with the first direction. The first current collecting member electrically connects the first electrode terminal and each of the first tabs. Therefore, a plurality of first current collecting components do not need to be arranged in the shell to be connected with the first tabs of the plurality of electrode assemblies, and the thickness or the volume of the single electrode assembly does not need to be increased, so that the manufacturing difficulty of the electrode assemblies can be effectively reduced, and the manufacturing difficulty of the large-capacity battery monomer is reduced.

A control module for residential environments, commercial environments, manufacturing environments, public buildings, and retail environments. Currently, configuring or reconfiguring systems for these environments is time consuming. It would be beneficial to provide arbitrarily configurable sensor and control modules and more particularly to intelligent arbitrarily configurable sensor and control modules and arrays of sensor and control modules allowing increased functionality, connectivity, intelligence, decision making, and communications within these systems. Provided is a module including a casing; one or more interfaces, each interface disposed at a predetermined position within a surface of the casing and supporting at least one of data communications and power; and one or more circuits coupled to the one or more interfaces.

The utility model discloses an end cover assembly, a battery monomer, a battery and a power utilization device. The end cover assembly provided by the embodiment of the utility model comprises an end cover which is provided with a first through hole; the electrode leading-out piece comprises a connecting plate and a pole terminal protruding out of the surface of the connecting plate, at least part of the pole terminal is arranged in the first through hole, the connecting plate is located on one side of the end cover, and the connecting plate is used for being connected with a tab of the electrode assembly. In the technical scheme of the embodiment of the invention, the electrode lead-out piece is arranged, so that the contact area of the pole and the tab is increased, the overcurrent area of the pole terminal and the connecting plate is enlarged, the internal resistance is reduced, the temperature rise is reduced, and the safety performance of the battery monomer is improved.

The invention relates to the technical field of batteries, and discloses a battery and a power utilization device, and the battery comprises a battery cell which comprises a battery cell body and a tab part; a first surface is formed on one surface, far away from the battery cell body, of the switching piece, at least part of the tab part is folded to the first surface from the first edge of the switching piece and is welded with the first surface to form a first welding area, and the end part of the tab part completely exceeds the first welding area in the x direction; the pole column is welded on the first surface and forms a second welding area; and along the x direction, the minimum distance between the edge of the first welding area and the outer wall of the pole is d, the maximum distance between the end part of the tab part and the first edge is b, the minimum distance between the end part of the tab part and the first edge is a, and d-(b-a) is more than or equal to-10mm and less than or equal to 30mm. According to the invention, while the welding quality of the pole and the adapter plate and the overcurrent capability between the pole and the adapter plate are ensured, the thermal runaway risk of the battery is reduced, and the safety performance of the battery is ensured.

The utility model relates to the field of batteries, and provides a battery monomer, a battery and a power utilization device. The battery cell includes a housing, an electrode assembly, and an insulating case. The insulating shell is accommodated in the shell. The electrode assembly is accommodated in the insulating shell. The bottom of the insulating shell is provided with a first through hole which is communicated with the inside and the outside of the insulating shell. The battery monomers can be relatively comprehensively and reliably coated outside the electrode assembly through the insulating shell to reliably insulate and isolate the electrode assembly and the shell, and on the basis, a first through hole can be formed in the bottom of the insulating shell, so that an electrolyte infiltration channel is formed through the first through hole, and the electrolyte infiltration channel is formed through the second through hole. Therefore, the electrolyte sinking to the bottom of the insulating shell due to gravity can enter the inner side of the insulating shell from the outer side of the insulating shell through the first through hole, and the electrode assembly in the insulating shell can be fully infiltrated, so that the infiltrating effect of the electrolyte on the electrode assembly can be improved, and the use reliability of the battery monomer can be improved.

The utility model provides a battery, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery comprises a box body, a battery monomer, a heat exchange side plate and a heat conduction layer, the box body is provided with a containing space, the single battery and the heat exchange side plate are both located in the containing space, the heat exchange side plate is connected with the box body, the heat exchange side plate is provided with a side heat exchange cavity, the single battery is provided with two opposite first faces, two opposite second faces and two opposite third faces, and the area of the first faces is larger than the area of the second faces and the area of the third faces. The heat exchange side plate is opposite to at least one of the second surface and the third surface; the heat conduction layer is at least positioned on the surface of one side, close to the battery monomer, of the heat exchange side plate. According to the battery provided by the invention, the heat exchange reliability of the battery can be improved.

The invention provides a positive pole piece, which comprises a current collector and a positive active layer, the positive active layer is arranged on at least one surface of the current collector, and the positive active layer comprises a first active layer directly coated on the current collector and a second active layer coated on the surface of one side, far away from the current collector, of the first active layer, the first active layer comprises first lithium iron phosphate particles, the thickness range of the first active layer is 15-60 [mu] m, the second active layer comprises second lithium iron phosphate particles and / or second lithium manganese phosphate particles, the thickness range of the second active layer is 60-130 [mu] m, and the thickness range of the second active layer is 15-60 [mu] m. The primary average particle size of the first lithium iron phosphate salt particles is 500-3000 nm, and the primary average particle size of the second lithium iron phosphate salt particles and / or the second lithium manganese iron phosphate salt particles is 150-480 nm.

The utility model provides a gas insulated switchgear (GIS) gas chamber sulfur hexafluoride (SF6) micro-water density monitoring sensor, and relates to the technical field of high-voltage electrical equipment state monitoring and sensors. The sensor comprises a sensor main body, an immersion type probe, a micro heating module and a communication module, the sensor body is a sealed shell, and a data processing unit and a power interface are arranged in the sensor body. The immersion type probe penetrates through the bottom of the main body and is fixedly connected with and exposes the pressure, humidity and temperature sensor. The micro-heating module is fixed on the surface of the probe and electrically connected with the humidity sensor. And the data processing unit is integrated with a temperature compensation module and is in signal connection with the pressure and temperature sensor. And the communication module is arranged at the top of the main body, comprises an RS485 interface and is connected with the data processing unit to realize data transmission. The sensor is used for monitoring the micro-water density of SF6 gas in a GIS gas chamber, and solves the technical problem of how to realize high-precision and anti-interference real-time online monitoring of the micro-water density on the premise of not discharging the SF6 gas.

The invention provides a charging and discharging control method and a power supply controller for a new energy motor home, and belongs to the technical field of new energy motor homes. In order to solve the problem that a power supply controller for a new energy motor home cannot provide alternating current while charging, the invention provides a charging and discharging control method which comprises the following steps: responding to a vehicle charging port complete connection signal, synchronizing a bidirectional vehicle-mounted charger and a mains supply phase, after the phase synchronization, the power supply of the alternating current electric appliance in the vehicle is switched from the inversion power supply of the bidirectional vehicle-mounted charger to the commercial power supply; in response to a charging permission instruction, charging a vehicle power battery through the bidirectional vehicle-mounted charger; and obtaining the total power of the in-vehicle alternating current electric appliance, and adjusting the charging power of the bidirectional vehicle-mounted charger or the total power of the in-vehicle alternating current electric appliance based on a first threshold value. According to the invention, the problem of simultaneous working of charging and inversion is solved, and the situation of interruption and restart of the electric devices in the vehicle in the charging and inversion switching process is ensured not to occur.

The invention belongs to the technical field of electrical equipment safety monitoring, and provides an intelligent wire and cable distributed optical fiber temperature measurement early warning method and system, and the method comprises the steps: laying a distributed optical fiber temperature sensor network along a cable, and synchronously demodulating the temperature and strain information based on a distributed optical fiber sensing principle; the temperature, the strain information and the load current are uploaded to a cloud platform through a wireless communication module; operating a time-space fusion diagnosis model driven by a cable physical mechanism on a cloud platform to distinguish and position an abnormal overheating section caused by a current Joule heating effect, insulation loss or contact resistance dramatic increase; and after the abnormity is confirmed, the cloud platform generates a control instruction for the abnormal overheating section to cut off power supply, and an intelligent self-healing process can be started. According to the invention, physical root identification, accurate positioning and safe self-healing of the cable overheating fault are realized, and the safety of cable operation is greatly improved.

The utility model provides an all-terrain vehicle which comprises a vehicle body, a cabin shell, a storage box and a plurality of groups of electric devices, the cabin shell is arranged on the vehicle body, a front cabin is formed by the cabin shell and the vehicle body, and an access hole is formed in the cabin shell. The storage box is installed at the access hole and detachably connected with the cabin shell, part of the storage box is located in the front cabin, and the multiple sets of electric parts are arranged in the front cabin. Through optimization design, it is ensured that the storage box and the electric parts have enough installation space in the front cabin, meanwhile, when the storage box is in a detached state, the storage box enters the front cabin from the access hole, and the original occupied space of the storage box in the front cabin can serve as the operation space for overhauling the electric parts arranged in the front cabin; therefore, the arrangement of the plurality of groups of electric parts in the front cabin can consider the installation of the storage box and the maintenance of the electric parts.

The invention discloses a fault self-diagnosis method and system for a temperature transmitter under real-time monitoring, and relates to the technical field of fault self-diagnosis, and the method comprises the steps: collecting the spatial position information and working state parameters of high-frequency electrical equipment, carrying out the electromagnetic interference analysis through combining the spatial position information of a target temperature transmitter, and generating an electromagnetic interference distribution map; establishing an electromagnetic-temperature influence correlation, arranging an electromagnetic interference sensing module to obtain an electromagnetic interference change curve, and monitoring a temperature signal fluctuation curve in real time; performing association comparison analysis to generate an association matching result; and when abnormal matching occurs in the correlation matching result, temperature transmitting signal reconstruction is carried out to generate transmitter compensation parameters for transmitting signal correction, and fault risk early warning is carried out. According to the invention, the technical problem in the prior art that the fault is difficult to find in time and position accurately when the temperature transmitter is influenced by electromagnetic interference is solved, and the technical effect of improving the accuracy and real-time performance of fault diagnosis of the temperature transmitter is achieved.

The invention discloses a modularly installed electric energy metering box, and relates to the technical field of electric energy metering boxes, the top and bottom of a main gas box are connected with a plurality of assembly gas heads, one side of the main gas box is provided with a plurality of assembly boxes, one side of each assembly box is uniformly provided with a plurality of heat dissipation holes, and two sides of the top and two sides of the bottom of each assembly box are connected with communicating sleeves; the middle of the communication sleeve is connected with a supporting pipe, one end of the supporting pipe is sleeved with an assembling nut, the assembling nut is connected with the adjacent assembling air head, and the other end of the supporting pipe is connected with an external air head. The external air head in the assembling heat dissipation assembly can be connected with the assembling nut, and double-layer installation of electrical devices can be achieved in the metering box; the assembling nut in the flexible expansion assembly can also be connected with the expansion air head, flexible installation of a small number of electrical devices is achieved, the two assemblies are installed in a modularized mode, the heat dissipation effect is guaranteed, and meanwhile the space utilization rate of the whole metering box is improved.