CN207742668U - The telecommunication circuit of serial ports expansion on charging pile - Google Patents
The telecommunication circuit of serial ports expansion on charging pile Download PDFInfo
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- CN207742668U CN207742668U CN201721758414.6U CN201721758414U CN207742668U CN 207742668 U CN207742668 U CN 207742668U CN 201721758414 U CN201721758414 U CN 201721758414U CN 207742668 U CN207742668 U CN 207742668U
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Abstract
The utility model is related to a kind of telecommunication circuits of serial ports expansion on charging pile, solve the deficiencies in the prior art, and technical solution is：It is connect with microcontroller, including serial port extended chip and several RS485 modules, the serial ports input terminal of serial port extended chip are electrically connected with the serial ports of microcontroller, the serial ports selection input terminal of serial port extended chip is electrically connected with two chip selection signal ends of microcontroller；The RS485 modules are connect with the extended serial port of serial port extended chip respectively, and the RS485 modules are connect by RS485 buses with interface.The utility model need to only increase a serial port extended chip and can be achieved with communicating with multichannel RS485, ensure only one piece of ammeter in every RS485 bus, save and need to be arranged the trouble that electric meter address could communicate, greatly improve production and maintenance efficiency.
Description
Technical field
This patent is related to the telecommunication circuit on charging pile, and in particular to the telecommunication circuit of serial ports expansion on a kind of charging pile.
Background technology
With becoming increasingly popular for electric vehicle, the demand to charging pile is also more and more.In order to improve the use of charging pile
Efficiency and the cost for reducing charging pile, the charging piles that often appearance one machine pair fills in the market or even a machine four fills, and each
Charging gun is required for an ammeter to measure respective charge volume, the control board communications that ammeter passes through RS485 buses and charging pile.
Many producers connect all ammeters using a RS485 interface of control panel at present, by the way that electric meter address is arranged
It distinguishes, as shown in Figure 1, this mode needs the controller to every charging pile that corresponding electric meter address is arranged, passes through differentiation
Address to communicate with different ammeter, this strong influence production efficiency and on-site maintenance cost.
Utility model content
Utility model aims to solve the above-mentioned prior arts to be susceptible to a problem, exactly needs to fill to every
Corresponding electric meter address is arranged in the controller of electric stake, is communicated with different ammeters by distinguishing address, this strong influence
Production efficiency and on-site maintenance cost provide a kind of telecommunication circuit of serial ports expansion on charging pile.
Technical solution adopted by the utility model to solve its technical problems is：The communication of serial ports expansion on a kind of charging pile
Circuit is connect with microcontroller, it is characterised in that：Including serial port extended chip and several RS485 modules, serial port extended chip
Serial ports input terminal is electrically connected with the serial ports of microcontroller, and the serial ports of serial port extended chip selects two of input terminal and microcontroller
Chip selection signal end is electrically connected；The RS485 modules are connect with the extended serial port of serial port extended chip respectively, the RS485 modules
It is connect with interface by RS485 buses.The advantages of the utility model is compared with original mode be：A serial ports need to only be increased to expand
Exhibition chip can be achieved with communicating with multichannel RS485, ensures only one piece of ammeter in every RS485 bus, saves needs and electricity is arranged
The trouble that table address could communicate, greatly improves production and maintenance efficiency.
Preferably, the model 74HC4052 of the serial port extended chip；The RS485 modules model
RSM3485PHT；13rd foot of the serial port extended chip and the serial ports of microcontroller send pin connection, the serial ports expansion
3rd foot of chip and the serial ports hair of microcontroller receive pin connection, the 9th foot of the serial port extended chip and the 10th foot point
It is not connect with the I/O of microcontroller mouths, the 6th foot, the 7th foot and the 8th foot of the serial port extended chip are connected to ground, the string
16th foot of mouth extended chip is connected with power supply VCC.
Preferably, the RS485 modules include RS485 module U2, RS485 module U3, RS485 modules U4 and RS485
Module U5, the interface include interface J1, interface J2, interface J3 and interface J4,
The 1st foot of the RS485 modules U2 is connect with power supply VCC, and the 2nd foot of RS485 modules U2 is connect with ground GND,
The pin connection corresponding with interface J1's respectively of the 8th foot and 9 feet of RS485 modules U2；
The 1st foot of the RS485 modules U3 is connect with power supply VCC, and the 2nd foot of RS485 modules U3 is connect with ground GND,
The pin connection corresponding with interface J2's respectively of the 8th foot and 9 feet of RS485 modules U3；
The 1st foot of the RS485 modules U4 is connect with power supply VCC, and the 2nd foot of RS485 modules U4 is connect with ground GND,
The pin connection corresponding with interface J3's respectively of the 8th foot and 9 feet of RS485 modules U4；
The 1st foot of the RS485 modules U5 is connect with power supply VCC, and the 2nd foot of RS485 modules U5 is connect with ground GND,
The pin connection corresponding with interface J4's respectively of the 8th foot and 9 feet of RS485 modules U5.
Preferably, the RS485 modules pass sequentially through RS485 buses and interface is connect with ammeter.The utility model
Middle serial port extended chip is a high speed two-way four-way analog switch, its rs 232 serial interface signal timesharing microcontroller
Four serial ports are switched to, microcontroller selects I/O mouthfuls of P0, P1 to select with which road serial communication by serial ports.When P0=0, P1=0
When, MCU_TXD is connected to TXD1, and MCU_RXD is connected to RXD1 and microcontroller can be communicated with ammeter 1；As P0=0, P1=1,
MCU_TXD is connected to TXD2, and MCU_RXD is connected to RXD2 and microcontroller can be communicated with ammeter 2；As P0=1, P1=0,
MCU_TXD is connected to TXD3, and MCU_RXD is connected to RXD3 and microcontroller can be communicated with ammeter 3；As P0=1, P1=1,
MCU_TXD is connected to TXD4, and MCU_RXD is connected to RXD4 and microcontroller can be communicated with ammeter 4.Switched in this way by timesharing
Realize the communication with polylith ammeter.
The substantial effect of the utility model is：The advantages of the utility model is compared with original mode be：It only needs to increase
One serial port extended chip can be achieved with communicating with multichannel RS485, ensures only one piece of ammeter in every RS485 bus, saves
It needs that the trouble that electric meter address could communicate is arranged, greatly improves production and maintenance efficiency.
Description of the drawings
The Principle of Communication schematic diagram of Fig. 1 background technologies
The Principle of Communication schematic diagram of Fig. 2 present invention
The circuit diagram of the serial ports expansion of Fig. 3 present invention.
Specific implementation mode
Below by specific embodiment, and in conjunction with attached drawing, the technical solution of the utility model is made further specifically
It is bright.
Embodiment 1：
The telecommunication circuit of serial ports expansion, connect with microcontroller on a kind of charging pile, it is characterised in that：Including serial ports expansion
Chip and several RS485 modules, the serial ports input terminal of serial port extended chip are electrically connected with the serial ports of microcontroller, serial ports expansion core
The serial ports selection input terminal of piece is electrically connected with two chip selection signal ends of microcontroller；The RS485 modules expand with serial ports respectively
The extended serial port connection of chip is opened up, the RS485 modules are connect by RS485 buses with interface.
The model 74HC4052 of the serial port extended chip；The RS485 modules model RSM3485PHT；It is described
The serial ports of 13rd foot of serial port extended chip and microcontroller send pin connection, the serial port extended chip the 3rd foot with it is micro-
The serial ports hair of controller receives pin connection, the 9th foot of the serial port extended chip and the 10th foot respectively with microcontroller
I/O mouthfuls of connections, the 6th foot, the 7th foot and the 8th foot of the serial port extended chip be connected to ground, and the of the serial port extended chip
16 feet are connected with power supply VCC.
The RS485 modules include RS485 module U2, RS485 module U3, RS485 module U4 and RS485 module U5, institute
It includes interface J1, interface J2, interface J3 and interface J4 to state interface,
The 1st foot of the RS485 modules U2 is connect with power supply VCC, and the 2nd foot of RS485 modules U2 is connect with ground GND,
The pin connection corresponding with interface J1's respectively of the 8th foot and 9 feet of RS485 modules U2；
The 1st foot of the RS485 modules U3 is connect with power supply VCC, and the 2nd foot of RS485 modules U3 is connect with ground GND,
The pin connection corresponding with interface J2's respectively of the 8th foot and 9 feet of RS485 modules U3；
The 1st foot of the RS485 modules U4 is connect with power supply VCC, and the 2nd foot of RS485 modules U4 is connect with ground GND,
The pin connection corresponding with interface J3's respectively of the 8th foot and 9 feet of RS485 modules U4；
The 1st foot of the RS485 modules U5 is connect with power supply VCC, and the 2nd foot of RS485 modules U5 is connect with ground GND,
The pin connection corresponding with interface J4's respectively of the 8th foot and 9 feet of RS485 modules U5.
The RS485 modules pass sequentially through RS485 buses and interface is connect with ammeter.
In the present embodiment, serial port extended chip is a high speed two-way four-way analog switch, it is microcontroller
A rs 232 serial interface signal timesharing switch to four serial ports, microcontroller selects I/O mouthful P0, P1 to select with which road string by serial ports
Port communications.As P0=0, P1=0, MCU_TXD is connected to TXD1, and MCU_RXD is connected to RXD1 and microcontroller can be with ammeter 1
Communication；As P0=0, P1=1, MCU_TXD is connected to TXD2, and MCU_RXD is connected to RXD2 and microcontroller can be logical with ammeter 2
Letter；As P0=1, P1=0, MCU_TXD is connected to TXD3, and MCU_RXD is connected to RXD3 and microcontroller can be communicated with ammeter 3；
As P0=1, P1=1, MCU_TXD is connected to TXD4, and MCU_RXD is connected to RXD4 and microcontroller can be communicated with ammeter 4.This
Sample is realized by timesharing switching and the communication of polylith ammeter.
The advantages of compared with original mode is：It only need to increase a serial port extended chip to can be achieved with and multichannel RS485
Communication ensures only one piece of ammeter in every RS485 bus, saves and need to be arranged the trouble that electric meter address could communicate, greatly
Improve production and maintenance efficiency.
Embodiment described above is a kind of preferable scheme of the utility model, is not made to the utility model any
Formal limitation, on the premise of not exceeding the technical scheme recorded in the claims also other variations and modifications.
Claims (4)
1. the telecommunication circuit of serial ports expansion, connect with microcontroller on a kind of charging pile, it is characterised in that：Including serial ports expansion core
Piece and several RS485 modules, the serial ports input terminal of serial port extended chip are electrically connected with the serial ports of microcontroller, serial port extended chip
Serial ports selection input terminal be electrically connected with two chip selection signal ends of microcontroller；The RS485 modules respectively with serial ports expansion
The extended serial port of chip connects, and the RS485 modules are connect by RS485 buses with interface.
2. the telecommunication circuit of serial ports expansion on charging pile according to claim 1, it is characterised in that：The serial ports expansion core
The model 74HC4052 of piece；The RS485 modules model RSM3485PHT；13rd foot of the serial port extended chip with
The serial ports hair that the serial ports of microcontroller sends pin connection, the 3rd foot of the serial port extended chip and microcontroller receives pin
Connection, the 9th foot of the serial port extended chip and the 10th foot are connect with the I/O of microcontroller mouths respectively, the serial ports expansion
The 6th foot, the 7th foot and the 8th foot of chip are connected to ground, and the 16th foot of the serial port extended chip is connected with power supply VCC.
3. the telecommunication circuit of serial ports expansion on charging pile according to claim 2, it is characterised in that：The RS485 modules
Including RS485 module U2, RS485 module U3, RS485 module U4 and RS485 module U5, the interface includes interface J1, interface
J2, interface J3 and interface J4,
The 1st foot of the RS485 modules U2 is connect with power supply VCC, and the 2nd foot of RS485 modules U2 is connect with ground GND, RS485 moulds
The 8th foot of block U2 and the pin connection corresponding with interface J1's respectively of 9 feet；
The 1st foot of the RS485 modules U3 is connect with power supply VCC, and the 2nd foot of RS485 modules U3 is connect with ground GND, RS485 moulds
The 8th foot of block U3 and the pin connection corresponding with interface J2's respectively of 9 feet；
The 1st foot of the RS485 modules U4 is connect with power supply VCC, and the 2nd foot of RS485 modules U4 is connect with ground GND, RS485 moulds
The 8th foot of block U4 and the pin connection corresponding with interface J3's respectively of 9 feet；
The 1st foot of the RS485 modules U5 is connect with power supply VCC, and the 2nd foot of RS485 modules U5 is connect with ground GND, RS485 moulds
The 8th foot of block U5 and the pin connection corresponding with interface J4's respectively of 9 feet.
4. the telecommunication circuit of serial ports expansion on charging pile according to claim 2, it is characterised in that：The RS485 modules
It passes sequentially through RS485 buses and interface is connect with ammeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721758414.6U CN207742668U (en) | 2017-12-15 | 2017-12-15 | The telecommunication circuit of serial ports expansion on charging pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721758414.6U CN207742668U (en) | 2017-12-15 | 2017-12-15 | The telecommunication circuit of serial ports expansion on charging pile |
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| CN207742668U true CN207742668U (en) | 2018-08-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112114191A (en) * | 2020-07-08 | 2020-12-22 | 珠海兴诺能源技术有限公司 | Charging metering circuit and charging pile |
| CN115473759A (en) * | 2022-08-30 | 2022-12-13 | 一恒生命科学仪器(昆山)有限公司 | Method for realizing multi-machine communication, printing and storing based on extended RS485 communication interface |
| CN112114191B (en) * | 2020-07-08 | 2024-07-05 | 珠海兴诺能源技术有限公司 | Charging metering circuit and charging pile |
-
2017
- 2017-12-15 CN CN201721758414.6U patent/CN207742668U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112114191A (en) * | 2020-07-08 | 2020-12-22 | 珠海兴诺能源技术有限公司 | Charging metering circuit and charging pile |
| CN112114191B (en) * | 2020-07-08 | 2024-07-05 | 珠海兴诺能源技术有限公司 | Charging metering circuit and charging pile |
| CN115473759A (en) * | 2022-08-30 | 2022-12-13 | 一恒生命科学仪器(昆山)有限公司 | Method for realizing multi-machine communication, printing and storing based on extended RS485 communication interface |
| CN115473759B (en) * | 2022-08-30 | 2024-04-26 | 一恒生命科学仪器(昆山)有限公司 | Method for realizing multi-machine communication, printing and storing based on extended RS485 communication interface |
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