CN211391010U - Battery car electricity consumption monitoring device and system - Google Patents
Battery car electricity consumption monitoring device and system Download PDFInfo
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- CN211391010U CN211391010U CN201921362379.5U CN201921362379U CN211391010U CN 211391010 U CN211391010 U CN 211391010U CN 201921362379 U CN201921362379 U CN 201921362379U CN 211391010 U CN211391010 U CN 211391010U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
The utility model discloses an electric monitoring device and system for a battery car, the electric monitoring device for the battery car is arranged on a power supply bus of a plurality of charging areas, and comprises a main controller, a frequency sampling circuit, a current sampling circuit, a voltage sampling circuit and an electric leakage monitoring circuit; the method comprises the following steps that parameters such as frequency, current, voltage and leakage current on a power supply bus are collected, and after a power supply in any charging area is connected to a charger of the battery car, the voltage and the current on the power supply bus are affected; in an area where the storage battery car is not allowed to be charged, once frequency, voltage, current or leakage current data detected from the power supply bus exceed a set range, an alarm can be sent to the intelligent terminal and/or the cloud server, and power-off processing is carried out; when the storage battery car is allowed to be charged, the frequency, the voltage, the current or the leakage current data in the charging process of the storage battery car are monitored, the charging safety of the storage battery car is guaranteed, and the problem that the charging safety problem of the storage battery car is frequent is solved.
Description
Technical Field
The utility model belongs to the technical field of the storage battery car, specifically speaking relates to an electric monitoring devices and system for storage battery car.
Background
Along with the popularization of new energy vehicles, the use amount of the battery cars is more and more, the problem of frequent power utilization accidents is brought, and the power utilization safety becomes a problem to be solved urgently.
At present, a user charges the battery car, or the charging device provided by a public facility is used for realizing, or the battery car is charged in a home corridor or a home power supply, wherein the charging device provided by the public facility is specially used for the battery car and has a safe charging design, but the power supply in the home corridor or the home is not specially used for the battery car charging design and has a safety protection measure, and when the charging device is used for charging the battery car, the conditions of unstable voltage and current can exist, so that the charging safety problem frequently occurs.
Disclosure of Invention
An object of the utility model is to provide an electric monitoring devices and system for storage battery car solves the above-mentioned technical problem that storage battery car charges and exists.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
the electric monitoring device for the electromobile is arranged on a power supply bus and comprises a main controller; further comprising: the frequency sampling circuit comprises a high-frequency current transformer or a first sampling resistor, a differential amplifier and an analog-to-digital converter; a live wire of a power supply bus penetrates through the high-frequency current transformer, or the first sampling resistor is connected in series with the live wire; the input end of the differential amplifier is connected with the output of the high-frequency current transformer or the first sampling resistor; the analog-to-digital converter converts the output of the differential amplifier into a digital signal and outputs the digital signal to the main controller; the current sampling circuit is connected with a power supply, and the output of the current sampling circuit is connected with the main controller; the voltage sampling circuit is connected with a power supply, and the output of the voltage sampling circuit is connected with the main controller; the leakage monitoring circuit comprises a residual current transformer, a first load resistor and a second load resistor; a live wire of a power supply bus penetrates through the residual current transformer, and the first load resistor and the second load resistor are connected in series and then connected in parallel to the secondary side of the residual current transformer; and a secondary side bias voltage is connected between the first load resistor and the second load resistor.
Further, the frequency sampling circuit further includes: a bias voltage circuit for providing a bias voltage to the differential amplifier; and the band-pass filter circuit is connected with the output of the differential amplifier, and the output of the band-pass filter circuit is connected with the input of the analog-to-digital converter.
Further, the current sampling circuit includes: the second sampling resistor is connected in series with a live wire of the power supply bus; and the first differential low-pass filter circuit is connected in parallel with the second sampling resistor.
Further, the first sampling resistor is multiplexed with the second sampling resistor.
Further, the voltage sampling circuit includes: one end of the third sampling resistor is grounded; the voltage dividing resistors are connected in series, are connected with a zero line of a power supply bus and are connected with the other end of the third sampling resistor; and the low-pass filter circuit is connected in parallel with the third sampling resistor.
Further, the apparatus further comprises: and the power metering chip is used for metering the power of the current sampling circuit and the voltage sampling circuit and is connected with the master controller.
Further, the apparatus further comprises: and the wireless communication module is connected with the master controller.
Further, the apparatus further comprises: and the alarm circuit is connected with the main controller.
Further, the leakage monitoring circuit further includes: the TVS tube is connected in parallel to the secondary side of the residual current transformer; and/or the second differential low-pass filter circuit is connected with the secondary side of the residual current transformer in parallel.
The electric monitoring system for the electromobile is provided, and comprises a plurality of charging areas, wherein each charging area is provided with a power supply; the power supply sources of the charging areas are connected to the power supply bus; further comprising: the electric monitoring device for the electromobile is arranged on the power supply bus; the intelligent terminal is interconnected with the electric monitoring device for the battery car; and the server is respectively interconnected with the electric monitoring device for the electromobile and the intelligent terminal.
Compared with the prior art, the utility model discloses an advantage is with positive effect: in the electric monitoring device and the system for the storage battery car, the power supply sources of a plurality of charging areas such as public corridors, staircases, garages and other chargeable areas are all connected to the power supply bus, the electric monitoring device for the storage battery car is installed on the power supply bus and used for collecting the parameters such as frequency, current, voltage, leakage current and the like on the power supply bus, and after the power supply source of any one charging area is connected into the charger of the storage battery car, the voltage and the current on the power supply bus can be influenced; in an area where the storage battery car is not allowed to be charged, once frequency, voltage, current or leakage current data detected from the power supply bus exceed a set range, an alarm can be sent to the intelligent terminal and/or the cloud server, and power-off processing is carried out; when the storage battery car is allowed to be charged, the frequency, the voltage, the current or the leakage current data in the charging process of the storage battery car are monitored, the charging safety of the storage battery car is guaranteed, and the problem that the charging safety problem of the storage battery car is frequent is solved.
Other features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the invention, which is to be read in connection with the accompanying drawings.
Drawings
Fig. 1 is a device architecture diagram of the electric monitoring device for the battery car provided by the utility model;
fig. 2 is a system architecture diagram of the electric monitoring system for the battery car provided by the present invention;
fig. 3 is a circuit diagram of an embodiment of the middle frequency sampling circuit of the present invention;
fig. 4 is a circuit diagram of an embodiment of the current sampling circuit according to the present invention;
fig. 5 is a circuit diagram of an embodiment of the middle voltage sampling circuit according to the present invention;
fig. 6 is a circuit diagram embodiment of the middle leakage monitoring circuit of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The utility model discloses aim at solving the problem that current storage battery car charging accident takes place frequently, provide a monitoring power supply's electric monitoring devices for storage battery car, be applied to as in the electric monitoring systems for storage battery car shown in fig. 2, this system includes a plurality of charging area 2, for example public corridor is regional, the stairwell is regional, garage or other chargeable call regions etc. every charging area all includes power supply, and all power supply all connect on power supply bus 3, the utility model provides a storage battery car power consumption monitoring devices 1 installs on power supply bus 3, and frequency of power on the power supply bus, electric current, voltage and/or leakage current monitor, based on the monitoring of this device on power supply bus, in time discover to connect the condition that the storage battery car that charges on power supply bus, avoid the emergence of charging accident.
Specifically, as shown in fig. 1, the utility model provides an electric monitoring device 1 for storage battery car, including master controller 11 and the frequency sampling circuit 12, current sampling circuit 13, voltage sampling circuit 14 and the electric leakage monitoring circuit 15 of being connected with master controller 11.
As shown in fig. 3, the frequency sampling circuit 12 includes a high-frequency current transformer CT or a first sampling resistor R1, a differential amplifier U1, a bias voltage circuit U2, a band-pass filter circuit U3, and a digital-to-analog converter U4; a live wire L of the power supply bus penetrates through the high-frequency current transformer CT, or a first sampling resistor R1 is connected in series on the live wire L and is used for sampling frequency components on the power supply bus 3; the input end of the differential amplifier U1 is connected with the output of the high-frequency current transformer CT or the first sampling resistor R1, and the sampled frequency components are amplified; the bias voltage circuit U2 provides bias voltage for the differential amplifier U1; the band-pass filter circuit U3 filters the amplified frequency components, the analog-to-digital converter U4 converts the filtered output into a digital signal and outputs the digital signal to the main controller 11, and the charging problem of the battery car is judged by the processing of FFT, amplitude comparison and the like in the main controller 11. In the embodiment of the utility model provides an in, differential amplifier U1 uses the OPA835 of TI, and the gain is adjustable through external circuit, and bias voltage circuit U2 adopts TLV431, and band-pass filter circuit U3 can use passive or active filter, the embodiment of the utility model provides an in adopt second order active filter, according to the frequency characteristic that the storage battery car charges, band-pass filter circuit U3's bandwidth is selected to be 20KHZ-200 KHZ; the ADC U4 selects a 12bit, 1Msps ADC.
As shown in fig. 4, the current sampling circuit 13 includes a second sampling resistor R2 and a first differential low-pass filter circuit, the first differential low-pass filter circuit is connected in parallel to the second sampling resistor R2, and specifically includes a resistor R8, a capacitor C4, a resistor R11, and a capacitor C5, and the cutoff frequency is 4.8 KHZ. The second sampling resistor R2 is an alloy resistor and is connected in series with the live line L of the power supply bus, as shown in the figure, the live line L enters from P1 and exits from P2; the second sampling resistor R2 may be multiplexed with the first sampling resistor in the frequency sampling circuit 12.
As shown in fig. 5, the voltage sampling circuit 14 in the embodiment of the present invention includes a third sampling resistor R3, a plurality of series-connected voltage-dividing resistors R14-R17, and a low-pass filter circuit formed by C6, the series-connected voltage-dividing resistors R14-R17 are connected to the zero line of the power supply bus and connected to one end of the third sampling resistor R3, the other end of the third sampling resistor R3 is grounded, the low-pass filter circuit is connected in parallel to the third sampling resistor R3, and the cutoff frequency is 4.6 KHZ; the voltage across the third sampling resistor R3 is V1, and the line voltage is V, so V = V1 (R14 + R15+ R16+ R17+ R18)/R18.
The embodiment of the utility model provides an in, use power measurement chip to carry out the power measurement to current sampling and voltage sampling, adopt last sea beiling's BL0937, realize communication and isolation with master controller 11 based on opto-coupler connection, realize transshipping, short circuit, cross functions such as undervoltage detection.
As shown in fig. 6, the leakage monitor circuit 15 includes a residual current transformer CT2, a first load resistor R61 and a second load resistor R62, a TVS (transient voltage suppression diode) VP, and a second differential low-pass filter circuit; the live wire L of power supply bus passes through residual current transformer CT2, the embodiment of the utility model provides an adopt the punching residual current transformer, live wire L and zero line N pass the residual current transformer simultaneously, as once side, connect in parallel on the secondary side of residual current transformer CT2 after first load resistance R61 and second load resistance R62 establish ties; a secondary side bias voltage REF is connected between the first load resistor R61 and the second load resistor R62; the TVS tube VP is connected in parallel with the secondary side of the residual current transformer CT2, so that the rear-end circuit is prevented from being damaged by overhigh secondary side induction voltage when surge current appears on a circuit; the second differential low-pass filter circuit U6 is connected in parallel with the secondary side of the residual current transformer CT2, the cut-off frequency is 1.5KHZ, and the second differential low-pass filter circuit U6 comprises R19, C10, R20 and C20.
When leakage current is generated, a primary side user of a residual current transformer CT2 generates leakage current I1, the number of turns of a secondary side winding is N2, the secondary side induced current is I2, and load resistance R = R61+ R62, I1 × N1= I2 × N2, where N1=1, I2= I1/N2, and I1= V × N1/(R61+ R62) can be obtained according to a voltage V generated by the secondary side current on the load resistance.
In the electric monitoring system for the battery car shown in fig. 2, after the electric monitoring device for the battery car is installed on the power supply bus 3, the frequency, voltage, electric power and electric leakage on the power supply bus are monitored, after the power supply in any charging area is connected with the storage battery car for charging, the device 1 also comprises a wireless communication module 16 and an alarm circuit 17, when the charging voltage, current or frequency of the battery car is monitored to be abnormal or exceed a set range, or when the electric leakage condition is generated, the wireless communication module 16 sends an alarm signal to the interconnected intelligent terminal 4 and/or the cloud server 5, the alarm circuit 17 sends the alarm signal to remind at the same time, and the main controller 11 can control power failure and forbid power supply at the same time, so that accidents caused by continuous charging of the battery car are prevented. The wireless communication module 16 is, for example, a WIFI module, a GPRS module, an NB-IOT module, etc. in the prior art, and the alarm circuit 17 includes, but is not limited to, sound, light, electricity, display alarm, etc. all of which can be implemented by the prior art means, and details are not repeated in this application.
When the monitored signals are normal, the electric monitoring device for the electromobile continuously monitors the power supply bus so as to find the abnormal condition in time.
It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the present invention.
Claims (10)
1. The electric monitoring device for the battery car is arranged on the power supply bus and comprises a main controller;
it is characterized by also comprising:
the frequency sampling circuit comprises a high-frequency current transformer or a first sampling resistor, a differential amplifier and an analog-to-digital converter; a live wire of a power supply bus penetrates through the high-frequency current transformer, or the first sampling resistor is connected in series with the live wire; the input end of the differential amplifier is connected with the output of the high-frequency current transformer or the first sampling resistor; the analog-to-digital converter converts the output of the differential amplifier into a digital signal and outputs the digital signal to the main controller;
the current sampling circuit is connected with a power supply, and the output of the current sampling circuit is connected with the main controller;
the voltage sampling circuit is connected with a power supply, and the output of the voltage sampling circuit is connected with the main controller;
the leakage monitoring circuit comprises a residual current transformer, a first load resistor and a second load resistor; a live wire of a power supply bus penetrates through the residual current transformer, and the first load resistor and the second load resistor are connected in series and then connected in parallel to the secondary side of the residual current transformer; and a secondary side bias voltage is connected between the first load resistor and the second load resistor.
2. The electrical monitoring device of claim 1, wherein the frequency sampling circuit further comprises:
a bias voltage circuit for providing a bias voltage to the differential amplifier;
and the band-pass filter circuit is connected with the output of the differential amplifier, and the output of the band-pass filter circuit is connected with the input of the analog-to-digital converter.
3. The electrical monitoring device of claim 1, wherein the current sampling circuit comprises:
the second sampling resistor is connected in series with a live wire of the power supply bus;
and the first differential low-pass filter circuit is connected in parallel with the second sampling resistor.
4. The electrical monitoring device for an electric vehicle of claim 3, wherein the first sampling resistor is multiplexed with the second sampling resistor.
5. The electrical monitoring device for battery car as claimed in claim 1, wherein said voltage sampling circuit comprises:
one end of the third sampling resistor is grounded;
the voltage dividing resistors are connected in series, are connected with a zero line of a power supply bus and are connected with the other end of the third sampling resistor;
and the low-pass filter circuit is connected in parallel with the third sampling resistor.
6. The electrical monitoring device as claimed in claim 1, further comprising:
and the power metering chip is used for metering the power of the current sampling circuit and the voltage sampling circuit and is connected with the master controller.
7. The electrical monitoring device as claimed in claim 1, further comprising:
and the wireless communication module is connected with the master controller.
8. The electrical monitoring device as claimed in claim 1, further comprising:
and the alarm circuit is connected with the main controller.
9. The battery car electricity monitoring device of claim 1, wherein the leakage monitoring circuit further comprises:
the TVS tube is connected in parallel to the secondary side of the residual current transformer; and/or the presence of a gas in the gas,
and the second differential low-pass filter circuit is connected in parallel with the secondary side of the residual current transformer.
10. The electric monitoring system for the battery car comprises a plurality of charging areas, wherein each charging area is provided with a power supply; the power supply sources of the charging areas are connected to the power supply bus;
it is characterized by comprising:
the electric monitoring device for the battery car as claimed in any one of claims 1 to 9, which is mounted on the power supply bus;
the intelligent terminal is interconnected with the electric monitoring device for the battery car;
and the server is respectively interconnected with the electric monitoring device for the electromobile and the intelligent terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921362379.5U CN211391010U (en) | 2019-08-21 | 2019-08-21 | Battery car electricity consumption monitoring device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921362379.5U CN211391010U (en) | 2019-08-21 | 2019-08-21 | Battery car electricity consumption monitoring device and system |
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| Publication Number | Publication Date |
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| CN211391010U true CN211391010U (en) | 2020-09-01 |
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| CN201921362379.5U Active CN211391010U (en) | 2019-08-21 | 2019-08-21 | Battery car electricity consumption monitoring device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022155791A1 (en) * | 2021-01-19 | 2022-07-28 | 贵州电网有限责任公司 | Method for analyzing charging status of electric motorcycle on basis of analysis of electrical feature sequence |
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2019
- 2019-08-21 CN CN201921362379.5U patent/CN211391010U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022155791A1 (en) * | 2021-01-19 | 2022-07-28 | 贵州电网有限责任公司 | Method for analyzing charging status of electric motorcycle on basis of analysis of electrical feature sequence |
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