CN220933057U - Multi-module simple assembly type double-loop direct current electric energy meter - Google Patents
Multi-module simple assembly type double-loop direct current electric energy meter Download PDFInfo
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- CN220933057U CN220933057U CN202321703321.9U CN202321703321U CN220933057U CN 220933057 U CN220933057 U CN 220933057U CN 202321703321 U CN202321703321 U CN 202321703321U CN 220933057 U CN220933057 U CN 220933057U
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- 238000005070 sampling Methods 0.000 claims abstract description 125
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000002955 isolation Methods 0.000 claims description 16
- 230000001052 transient effect Effects 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000001629 suppression Effects 0.000 claims description 7
- 230000006978 adaptation Effects 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 208000025274 Lightning injury Diseases 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model provides a multi-module simple assembly type double-loop direct current electric energy meter which is characterized by comprising a bottom shell, a face shell, a display, a functional main board and two groups of sampling modules, wherein the sampling modules comprise a sampling circuit board and a module support which can be connected with the bottom shell in a dismounting mode, an outer wiring terminal, an inner wiring terminal, a voltage sampling module and a current sampling module are integrated on the sampling circuit board, the voltage sampling module and the current sampling module are respectively connected with the outer wiring terminal, the functional main board comprises an electric quantity metering module, the electric quantity metering module is connected with the inner wiring terminal, the inner wiring terminal is used for being in communication connection with the functional main board, the module support comprises a base plate and a vertical plate arranged on one side of the base plate, the sampling circuit board is supported on the base plate, the outer wiring terminal is opposite to the vertical plate, first through holes which are in one-to-one correspondence with the outer wiring terminal are formed in the vertical plate, and embedded ports which are respectively matched with the module support are arranged at two ends of the bottom shell.
Description
Technical Field
The utility model relates to the technical field of direct current electric energy meters, in particular to a multi-module simple-assembly type double-loop direct current electric energy meter.
Background
In recent years, new energy is developed greatly in China, new energy vehicle models are continuously pushed out by China, construction of domestic charging piles and charging stations is accelerated, and double-gun charging piles become the mainstream gradually. Correspondingly, the static double-loop direct current electric energy meter can be used for realizing electric energy metering work on the double-gun type charging pile. However, most of the current direct current electric energy meters are single-loop metering work, besides the additional sampling loops for adapting to the requirement of multi-loop electric energy metering, the problem of difficult installation and disassembly existing in the process of increasing/decreasing the sampling loops is also required to be considered, the existing direct current electric energy meters are directly arranged on a circuit board in a watchcase, the additional sampling loops are required to be redesigned to lead to the lengthening of the production period, and the different sampling loops cannot be independently maintained, so that the labor cost and the product failure rate of the whole company are influenced to a certain extent.
Disclosure of utility model
In order to overcome the problems in the prior art, the utility model provides a multi-module simple assembly type double-loop direct current electric energy meter, which is realized by the following technical means:
The utility model provides a simple and easy equipment formula double-circuit direct current electric energy meter of multi-module, its includes drain pan, face-piece, display, function mainboard and two sets of sampling module, sampling module includes sampling circuit board to and can be with the module support of drain pan dismouting connection, the last integration of sampling circuit board has outer binding post, interior binding post, voltage sampling module and current sampling module are connected with outer binding post respectively, the function mainboard includes electric quantity metering module, and electric quantity metering module is connected with interior binding post, interior binding post is used for being connected with the communication of function mainboard, the module support includes base plate and locates the riser on one side of this base plate, sampling circuit board is born on the base plate and outside binding post is relative with the riser, set up on the riser with the first perforation of outside binding post one-to-one, set up respectively with the inlaying mouth of module support adaptation, after module support and the drain pan assembly, its riser covers inlay mouth.
In one or more embodiments of the present utility model, the voltage sampling module includes a common mode choke circuit, a resistive voltage dividing circuit and a voltage sampling circuit that are sequentially connected, where the common mode choke circuit includes a common mode inductor TJ1, two ends of the common mode inductor TJ1 are respectively connected to an external connection terminal, and the resistive voltage dividing circuit includes a plurality of voltage dividing resistors that are serially connected between an output end of the common mode inductor and an input end of the voltage sampling circuit.
In one or more embodiments of the present utility model, the voltage sampling circuit includes sampling resistors RJ21 and RJ35, capacitors CJ5 and CJ7, the sampling resistors RJ21 and RJ35 are connected in series and the connection point is grounded, the capacitor CJ5 is connected in parallel to two ends of the sampling resistor RJ21, the capacitor CJ7 is connected in parallel to two ends of the sampling resistor RJ35, and the sampling resistor RJ21 is connected with a resistive voltage dividing circuit.
In one or more embodiments of the present utility model, the current sampling module includes a transient voltage suppression circuit and a current sampling circuit, the transient voltage suppression circuit includes a TVS transient diode, the current sampling circuit includes sampling resistors RJ1, RJ3, RJ5 and RJ7 connected in series, and capacitors CJ1 and CJ3, a connection point of the sampling resistors RJ1 and RJ3 is used as a positive input terminal of the current sampling circuit, a connection point of the sampling resistor RJ5 and RJ7 is used as a negative input terminal of the current sampling circuit, a connection point of the sampling resistors RJ3 and RJ5 is grounded, and the TVS transient diode is connected between the positive input terminal and the negative input terminal.
In one or more embodiments of the present utility model, the internal connection terminals are pin bars or bus bars, and the pin bars or bus bars face the face shell, and are plugged with corresponding terminals on the functional motherboard after the bottom shell and the face shell are buckled.
In one or more embodiments of the present utility model, the external connection terminal has a plurality of side-by-side arranged at one end of the sampling circuit board, two side plates extending from two ends of the vertical plate towards one side of the substrate, two side plates respectively provided with a clamping groove, and an isolation baffle plate is embedded in the clamping groove to form an isolation chamber for accommodating the external connection terminal between the isolation baffle plate and the vertical plate.
Compared with the prior art, the utility model has the advantages that:
1) The sampling module adopts an independent plug-in structure, the disassembly and assembly process is simple and easy, a great amount of operation procedures and labor cost are saved without welding, the maintenance difficulty of maintenance personnel is reduced, the sampling loop can be increased or reduced according to the use requirement, the sampling requirement of multiple loops can be easily met, more importantly, the whole board design is not required for the main board in the increasing/reducing of the sampling loop, the production and design period is greatly shortened, and the performance quality of products is guaranteed by manufacturers.
2) The sampling module with faults can be directly disassembled for maintenance, or the sampling module with faults can be directly replaced by the sampling module with faults, so that the maintenance efficiency is greatly improved, and the maintenance cost is reduced.
3) The common mode choke module is connected in series with the front end of the voltage sampling to inhibit common mode current conducted by a power line and common mode interference existing in a power grid, so that filtering is realized; a resistive voltage division module is added at the front end of the voltage sampling to play a role in multi-stage voltage division, so that peak interference or instant interference, such as lightning stroke and electric rapid pulse interference, can be absorbed; the transient voltage suppression module is added at the front end of the current sampling, so that the transient interference and the conducted pulse signals can be absorbed in a very short time.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a dc electric energy meter.
Fig. 2 is a schematic diagram of an explosion structure of the dc electric energy meter.
Fig. 3 is a schematic structural diagram of a sampling module.
Fig. 4 is a schematic block diagram of a sampling circuit board.
Fig. 5 is a schematic circuit diagram of a voltage sampling module.
Fig. 6 is a schematic circuit diagram of a current sampling module.
Detailed Description
The inventive arrangements are further described below in conjunction with fig. 1 to 5:
Referring to fig. 1 to 3, the direct current electric energy meter with the multi-module assembly structure comprises a bottom shell 1, a face shell 2, a display 3, a functional main board 4 and two groups of sampling modules 5, wherein the display 3 and the functional main board 4 are arranged on the face shell 1, and each sampling module 5 respectively comprises a sampling circuit board 51 and a module bracket 52 which is detachably connected with the bottom shell 1; the sampling circuit board 51 is supported on the module support 52, and is integrated with an external terminal 6, an internal terminal 7, a voltage sampling module 9 and a current sampling module 10, wherein the voltage sampling module 9 and the current sampling module 10 are respectively connected with the external terminal 6, and the internal terminal 7 is used for being in communication connection with a functional motherboard.
Specifically, the inner terminal 7 is a pin header, the pin header faces the surface shell, and is spliced with a pin header on the functional motherboard 4 after the bottom shell 1 and the surface shell 2 are buckled, so that the sampling circuit board 51 is used for transmitting sampling signals to the functional motherboard 4, the functional motherboard 4 comprises conventional modules such as a display module, an electric quantity metering module and the like, the conventional modules are connected with each sampling module 5 by locating the pin header on the PCB towards the bottom shell 1, the pin header and the pin header are in butt joint, the traditional welding or data wire connection trouble is avoided, the functional motherboard 4 and the sampling modules 5 are also adapted after being respectively fixed with the surface shell 2 and the bottom shell 1, the pin header and the pin header are prevented from being connected and aligned, and the overhaul and maintenance are convenient.
Referring to fig. 4 to 6, the voltage sampling module 9 includes a common mode choke circuit, a resistive voltage dividing circuit and a voltage sampling circuit, which are sequentially connected, the common mode choke circuit includes a common mode inductor TJ1, two ends of the common mode inductor TJ1 are respectively connected with "v1+" and "V1-" of the external connection terminal 6, and the resistive voltage dividing circuit includes a plurality of voltage dividing resistors RJ9-RJ14, R23-RJ28 connected in series between an output end of the common mode inductor TJ1 and an input end of the voltage sampling circuit. The voltage sampling circuit comprises sampling resistors RJ21 and RJ35, capacitors CJ5 and CJ7, wherein the sampling resistors RJ21 and RJ35 are connected in series, the connection point is grounded, the capacitor CJ5 is connected in parallel with the two ends of the sampling resistor RJ21, the capacitor CJ7 is connected in parallel with the two ends of the sampling resistor RJ35, and the sampling resistor RJ21 is connected with the resistive voltage dividing circuit. The front end of the voltage sampling circuit is connected in series with a common mode inductor TJ1 to inhibit common mode current conducted by a power line and common mode interference existing in a power grid, so that filtering is realized; meanwhile, the voltage dividing resistors RJ9-RJ14 and R23-RJ28 are arranged to have the voltage dividing effect on the sampling voltage, so that the peak interference or the instant interference, such as lightning stroke and electric rapid pulse interference, can be absorbed.
The current sampling module comprises a transient voltage suppression circuit and a current sampling circuit, the transient voltage suppression circuit comprises a TVS transient diode, the current sampling circuit comprises sampling resistors RJ1, RJ3, RJ5 and RJ7 which are connected in series, and capacitors CJ1 and CJ3, the connection point of the sampling resistor RJ1 and the RJ3 is used as the positive electrode input end of the current sampling circuit, the connection point of the sampling resistor RJ5 and the RJ7 is used as the negative electrode input end of the current sampling circuit, the connection point of the sampling resistor RJ3 and the RJ5 is grounded, and the TVS transient diode is connected between the positive electrode input end and the negative electrode input end. The transient diode is arranged at the front end of the current sampling circuit, and the characteristics of quick response to the instantaneous large voltage are utilized to absorb the instantaneous interference and the conducted pulse signals in a very short time.
Still further, the external terminal 6 has a plurality of and arranges side by side in the one end of sampling circuit board 51, be equipped with pluggable isolation baffle 8 on the module support 52, the module support 52 includes base plate 521, locates riser 522 on this base plate 521 one side, and two curb plates 523 that stretch out towards base plate 521 one side at the both ends of riser 522, be equipped with draw-in groove 524 on two curb plates 523 respectively, the both ends of isolation baffle 8 inlay and put in draw-in groove 524 make and keep apart cavity 520 between isolation baffle 8 and riser 522, install sampling circuit board 51 out-of-band binding post 6's one end towards riser 522, inlay the both ends of isolation baffle 8 and put into draw-in groove 524 after fixing to make isolation baffle 8 stand up again to accept external binding post 6 in keeping apart cavity 520, be equipped with the first perforation with external terminal 6 one-to-one on the riser 522, the upper end of keeping apart cavity is opened, be equipped with second perforation 20 on the face shell 2 and the position that keeps right with this isolation cavity 520 for the waterproof screw of this isolation cavity 520 makes things convenient for the face 21 to cover the flip, be equipped with the breach 21 along the flip 21 for this flip 21 to cover.
The module support 52 is generally a plastic support, the thickness of the isolation baffle 8 is 1.2mm (the thickness is adjusted according to the electrical isolation requirement), and the internal circuit of the sampling circuit board 51 is effectively isolated from the external high voltage by the isolation baffle 8, so that the internal circuit is prevented from being damaged by the external high voltage.
As a preferred solution, the side surface of the bottom shell 1 is provided with an embedding opening 11 adapted to the contour of the vertical plate 522, two ends of the vertical plate 522 are respectively provided with an ear plate 526 facing outwards along the plate body, the ear plates 526 are assembled and limited with the inner wall of the bottom shell 1, in this embodiment, the ear plates 526 are clamped in the gap between the inner wall of the bottom shell 1 and the connecting column, after being installed, the outer side of the vertical plate 522 corresponds to the surface of the bottom shell 1, and the first through holes 525 are exposed, so that the wiring is convenient. If the sampling module 5 needs to be deleted, the module bracket 52 without the sampling circuit board can be installed after the sampling module 5 is detached so as to ensure the integrity of the appearance of the ammeter, and the structural design can be covered on the ammeter products such as single loop and double loop of a company, thereby being beneficial to batch production.
Compared with the traditional mode of direct welded fixation of the whole module, the sampling module of the device adopts an independent plug-in structure, the disassembly and assembly process is simple and easy, the disassembly and assembly process is not needed to be performed through welding, a large number of operation procedures and labor cost are saved, and the maintenance difficulty of maintenance personnel is reduced. The sampling loop can be added or subtracted according to the use requirement, the sampling requirement of a single loop and multiple loops can be easily met, more importantly, the addition/subtraction of the sampling loop does not need to carry out whole board design on a main board, the production and design period is greatly shortened, and the performance quality of products is guaranteed by manufacturers. The sampling module with faults can be directly disassembled for maintenance, or the sampling module with faults can be directly replaced by the sampling module with faults, so that the maintenance efficiency is greatly improved, and the maintenance cost is reduced.
The above-mentioned preferred embodiments should be regarded as illustrative examples of embodiments of the present application, and all such technical deductions, substitutions, improvements made on the basis of the same, similar or similar embodiments of the present application should be regarded as the protection scope of the present patent.
Claims (6)
1. The utility model provides a simple and easy equipment formula double-circuit direct current electric energy meter of multi-module, its characterized in that includes drain pan, face-piece, display, function mainboard and two sets of sampling module, sampling module includes sampling circuit board to and can be with the module support of drain pan dismouting connection, the last integration of sampling circuit board has outer binding post, interior binding post, voltage sampling module and current sampling module are connected with outer binding post respectively, the function mainboard includes electric quantity metering module, and electric quantity metering module is connected with inner binding post, inner binding post is used for being connected with the communication of function mainboard, the module support includes base plate and locates the riser on one side of this base plate, sampling circuit board is born on the base plate and outer binding post is relative with the riser, set up on the riser with the first perforation of outer binding post one-to-one, set up respectively with the inlaying mouth of module support adaptation, its riser covers after module support and the drain pan assembly inlaying mouth.
2. The multi-module simple assembly type double-loop direct current electric energy meter according to claim 1, wherein the voltage sampling module comprises a common mode choke circuit, a resistive voltage dividing circuit and a voltage sampling circuit which are sequentially connected, the common mode choke circuit comprises a common mode inductor TJ1, two ends of the common mode inductor TJ1 are respectively connected with an external wiring terminal, and the resistive voltage dividing circuit comprises a plurality of voltage dividing resistors which are connected between an output end of the common mode inductor and an input end of the voltage sampling circuit in series.
3. The multi-module simple assembly type double-loop direct current electric energy meter according to claim 2, wherein the voltage sampling circuit comprises sampling resistors RJ21 and RJ35 and capacitors CJ5 and CJ7, the sampling resistors RJ21 and RJ35 are connected in series, the connection point is grounded, the capacitor CJ5 is connected in parallel with two ends of the sampling resistor RJ21, the capacitor CJ7 is connected in parallel with two ends of the sampling resistor RJ35, and the sampling resistor RJ21 is connected with a resistive voltage dividing circuit.
4. The multi-module simple assembled double-loop direct current electric energy meter according to claim 1, wherein the current sampling module comprises a transient voltage suppression circuit and a current sampling circuit, the transient voltage suppression circuit comprises a TVS transient diode, the current sampling circuit comprises sampling resistors RJ1, RJ3, RJ5 and RJ7 and capacitors CJ1 and CJ3 which are connected in series, the connection point of the sampling resistor RJ1 and RJ3 is used as the positive input end of the current sampling circuit, the connection point of the sampling resistor RJ5 and RJ7 is used as the negative input end of the current sampling circuit, the connection point of the sampling resistor RJ3 and RJ5 is grounded, and the TVS transient diode is connected between the positive input end and the negative input end.
5. The multi-module simple assembled double-loop direct current electric energy meter according to claim 1, wherein the inner wiring terminal is a pin or a socket, the pin or the socket faces the face shell, and the pin or the socket is spliced with corresponding terminals on the functional main board after the bottom shell and the face shell are buckled.
6. The multi-module simple assembly type double-loop direct current electric energy meter according to claim 1, wherein the external wiring terminal is arranged at one end of the sampling circuit board in a plurality of side-by-side manner, two side plates extending towards one side of the base plate at two ends of the vertical plate are respectively provided with a clamping groove, and an isolation baffle is embedded in the clamping grooves to form an isolation chamber for accommodating the external wiring terminal between the isolation baffle and the vertical plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321703321.9U CN220933057U (en) | 2023-07-01 | 2023-07-01 | Multi-module simple assembly type double-loop direct current electric energy meter |
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| CN202321703321.9U CN220933057U (en) | 2023-07-01 | 2023-07-01 | Multi-module simple assembly type double-loop direct current electric energy meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117110674A (en) * | 2023-07-01 | 2023-11-24 | 珠海东帆科技有限公司 | A multi-module simple assembly dual-circuit DC energy meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117110674A (en) * | 2023-07-01 | 2023-11-24 | 珠海东帆科技有限公司 | A multi-module simple assembly dual-circuit DC energy meter |
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