CN206020596U - A kind of charging pile insulation monitoring and warning device of bridge method design - Google Patents
A kind of charging pile insulation monitoring and warning device of bridge method design Download PDFInfo
- Publication number
- CN206020596U CN206020596U CN201620925216.3U CN201620925216U CN206020596U CN 206020596 U CN206020596 U CN 206020596U CN 201620925216 U CN201620925216 U CN 201620925216U CN 206020596 U CN206020596 U CN 206020596U
- Authority
- CN
- China
- Prior art keywords
- resistance
- module
- charging pile
- switch
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
A kind of charging pile insulation monitoring and warning device of bridge method design, including the balanced bridge module, unbalanced bridge module, voltage transformation module, voltage isolation module, signal processing module and the communication module that are sequentially connected.Balanced bridge module is made up of to a pair of resistance of the earth to a pair of resistance and negative supply of the earth positive supply, and the voltage of wherein voltage transformation module collection takes from the respective partial pressure of these two pair resistance；It is light current voltage signal that voltage isolation module is used for the voltage conversion of input；The voltage of input is carried out digital conversion and calculates the size of earth resistance by signal processing module；Communication module is then used for for result of calculation being sent to system host.The device is it can be inferred that the failure mode of charging pile ground connection, and can more accurately calculate the size of earth resistance.Charging pile insulation monitoring and warning device based on the monitoring method can be the more advantageous monitoring mode in the current field with the earth fault of reliable and stable monitoring direct-current charging post and the size of earth resistance.
Description
Technical field
This utility model is related to charging pile insulating monitoring, supervises more particularly, to a kind of direct-current charging post earth fault safety
Survey device.
Background technology
With a large amount of construction and application of electric automobile charging station and charging pile, its safety is increasingly taken seriously.Especially
Which is that direct-current charging post power is big, volume is big, voltage is high, and is often furnished with accumulator and carries out energy storage, complex structure.Work as charging
When stake output DC side insulation is bad, device damage, fire, and the person can be caused to get an electric shock.Due to direct current output side leakage
Electric fault cannot make the earth leakage protective device action of AC, so, increase DC side insulating monitoring and earth-fault protection dress
Put and be particularly important.
Present charging pile insulated monitoring method mainly has bridge balance principle and low-frequency acquisition principle.According to bridge balance
The insulation monitoring and warning device that principle is realized is widely used, but it can not monitor the feelings when insulation of charging pile positive and negative electrode declines on an equal basis
Condition；Even if insulation monitoring and warning device is reported to the police, system insulation resistance size over the ground is not directly available.Supervised with low-frequency acquisition principle
It is a kind of new method for adopting in recent years to survey earth fault, but the earth resistance that it can monitor receives charging pile distribution capacity over the ground
Restriction, and low-frequency ac signal is easily interfered by outside, and the low-frequency ac signal in addition injecting increases the electricity of charging pile
Pressure ripple factor.
Content of the invention
In order to overcome deficiencies of the prior art, it is exhausted that this utility model provides a kind of charging pile of bridge method design
Edge monitoring device, on the premise of precision is ensured, improves monitoring velocity as far as possible and can calculate various insulation fault situations
The size of lower earth resistance, easy-to-look-up problem are located.
The technical solution of the utility model is：A kind of charging pile insulation monitoring and warning device of bridge method design, including detection electricity
Road and post processing circuitry, detect that the outfan of circuit is connected with the input of post processing circuitry, it is characterised in that described detection
Circuit is made up of balanced bridge module and unbalanced bridge module, the balanced bridge module by first resistor, second resistance, the 3rd
Resistance and the 4th resistance composition, first resistor and second resistance are connected between the positive pole and earth terminal of charging pile power supply, both
Contact be an outfan；The 3rd resistor and the 4th resistant series between the negative pole of earth terminal and charging pile power supply, two
The contact of person is another outfan；Two outfans are connected with the input of described post processing circuitry；The unbalanced bridge
Module is made up of the 5th resistance, the 6th resistance, first switch and second switch, and the 5th resistance and first switch are connected on charging pile
Between the positive pole and earth terminal of power supply；6th resistance and second switch are connected between the negative pole of earth terminal and charging pile power supply；
The 3rd switch and the 4th switch is connected between described detection circuit and the positive pole and negative pole of charging pile power supply.
Described post processing circuitry by the voltage transformation module, voltage isolation module, signal processing module being sequentially connected and
Communication module is constituted；Described first switch, second switch, the 3rd switch and the 4th switch are electric-controlled switch, and by controlling
Device is controlled, and the communication module sets up communication connection with the controller.
The utility model has the advantages that：Using balanced bridge module and unbalanced bridge module, prison that can be reliable and stable
Survey direct-current charging post earth fault and earth resistance size, and then by the insulation fault information of charging pile through communication module with
The communication of charging pile controller completes charging analysis, substantially increases the safety of charging pile.Simple structure, easily implements.
Description of the drawings
Fig. 1 is integrated circuit structural representation of the present utility model；
Fig. 2 is the composition block diagram of post processing circuitry of the present utility model.
Specific embodiment
As depicted in figs. 1 and 2, a kind of charging pile insulation monitoring and warning device of bridge method design of this utility model, including detection
Circuit A and post processing circuitry B, detects that the outfan of circuit A is connected with the input of post processing circuitry B, it is characterised in that institute
The detection circuit A for stating is made up of balanced bridge module 1 and unbalanced bridge module 2, and the balanced bridge module 1 is by first resistor
R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 composition, first resistor R1 and second resistance R2 are connected on charging pile electricity
Between the positive pole P+ in source and earth terminal, both contacts are an outfan V+；3rd resistor R3 and the 4th resistance R4 series connection
Between the negative pole P- of earth terminal and charging pile power supply, both contacts are another outfan V-；Two outfans V+, V- with
The input connection of described post processing circuitry；The unbalanced bridge module 2 is opened by the 5th resistance R5, the 6th resistance R6, first
Close K1 and second switch K2 compositions, the 5th resistance R5 and first switch K1 be connected on charging pile power supply positive pole P+ and earth terminal it
Between；6th resistance R6 and second switch K2 are connected between earth terminal and the negative pole P- of charging pile power supply；In described detection electricity
The 3rd switch K3 and the 4th switch K4 is connected between the positive pole P+ and negative pole P- of road A and charging pile power supply.
Described post processing circuitry B is by the voltage transformation module 3, voltage isolation module 4, signal processing module being sequentially connected
5 and communication module 6 constitute (for routine techniquess)；First to fourth described switch K1-K4 is electric-controlled switch, and by controller
7 controls, the communication module 6 set up communication connection with the controller 7.
Operation principle of the present utility model is described as follows：
Balanced bridge module 1 is used for monitoring charging pile situation single-end earthed, and unbalanced bridge module 2 is used for monitoring charging
Situation about being grounded during stake positive and negative electrodes in same.Two voltage outputs that the partial pressure that 1 four resistance R1-R4 of balanced bridge module are constituted is obtained
Calculating criterion of the magnitude of voltage of end V+ and V- as earth resistance.Voltage transformation module 3, voltage isolation module 4 and signal processing
Module 5 is re-used as input and carries out calculating process after branch pressure voltage value is isolated.Communication module 6 is responsible for by earthing type and connecing
The information transmissions such as position earth resistance are to controller 7 (master control borad of charging pile).
Two switches K1, K2 in described unbalanced bridge module 2 control the access of resistance R5, R6 respectively.
The Rx being connected in Fig. 1 between the positive pole P+ of charging pile power supply and negative pole P- and earth terminal and Ry is this practicality
New calculating object, the i.e. earth resistance of charging pile.
After 3rd switch K3 and the 4th switch K4 are connected, the balanced bridge module 1 of resistance R1-R4 compositions is permanently connected to fill
Between electric stake out-put supply both positive and negative polarity.Then selectively resistance R5 and R6 are accessed by switching K1 and K2.
The voltage of collection is taken from the respective partial pressure of these two pair resistance by described voltage transformation module 3.Voltage isolation module
Voltage conversion after being responsible for partial pressure is the voltage signal that signal processing module can be gathered.Signal processing module collection voltages every
Voltage after module isolation carries out digital conversion and calculates ground insulation situation, and can calculate the size of earth resistance.Communication mould
Block is sent to system host after being then responsible for calculating the size of the Grounding and earth resistance of power supply.It is characterized in that：Its structure
Become into the timesharing for controlling both modules including balancing resistance module and unbalanced resistance module and by embedded hardware system
Change.During measurement bus bar resistance, using balancing resistance module monitors single-end earthed.During measurement bus bar resistance, using unbalanced resistance
Module monitors positive supply is grounded simultaneously with negative supply.
Operationally, the control of each switch manually can control also can automatically control by controller this utility model.Work
Make procedure declaration as follows：
The first step：K1 disconnects, and K2 disconnects, and K3 is closed, and K4 is closed, and when Rx=Ry=is infinite, (no ground) has V1=-V2；
When Ry=is infinite (single-end earthed), by V1, V2 by solving equation V1/ (R5//Rx)=V2/R6, can calculate
The size of earth resistance Rx；
When Rx=is infinite (single-end earthed), by V1, V2 by solving equation V1/R5=V2/ (R6//Ry), can calculate
The size of earth resistance Ry；
As Rx=Ry ≠ infinite, i.e., system in balance ground connection when, V1=-V2, it is impossible to detected；
As Rx ≠ Ry, i.e., two sides earth when, have V1/ (R5//Rx)=V2/ (R6//Ry) to be unable to direct solution, process
Method is to regard as infinite by one larger in Rx or Ry, solves by method single-end earthed, and required grounding resistance is big
In actual value, the resistance value of Rx, Ry is closer to then measurement error is bigger, and when reaching Rx=Ry, measurement error reaches infinite.
Second step：K1 disconnects, and K2 is closed, and K3 is closed, and K4 is closed, and available according to the V+ for measuring is positive pole voltage-to-ground
V1, available according to the V- for measuring is negative mother voltage-to-ground V1 '.
3rd step：K2 disconnects, and K1 is closed, and K3 is closed, and K4 is closed, and available according to the V+ for measuring is positive pole voltage-to-ground
V2, available according to the V- for measuring is negative mother voltage-to-ground V2 '.Positive bus-bar earth resistance Rx=can be obtained according to approximate calculation
(V1’V2-V1V2’)/(V1’V2’R-V1’V2R1+V2’V1R+V2’V1R1)*R*R1.
Negative busbar earth resistance can be obtained in the same manner：Ry=(V1 ' V2-V1V2 ')/(V1V2 ' R+V1V2 ' R1+V2V1R-V2V1 '
R1)*R*R1
The Rx calculated by any of the above situation, Ry are grounding resistance size, can be according to this resistance value size
Judge Grounding.
Claims (2)
1. a kind of charging pile insulation monitoring and warning device of bridge method design, including detecting circuit (A) and post processing circuitry, detects circuit
Outfan be connected with the input of post processing circuitry, it is characterised in that described detection circuit (A) is by balanced bridge module
(1) with unbalanced bridge module (2) constitute, the balanced bridge module (1) by first resistor (R1), second resistance (R2), the 3rd
Resistance (R3) and the 4th resistance (R4) composition, first resistor (R1) and second resistance (R2) are connected on the positive pole (P of charging pile power supply
+) and earth terminal between, both contacts are an outfan (V+)；The 3rd resistor (R3) and the 4th resistance (R4) are connected on
Between the negative pole (P-) of earth terminal and charging pile power supply, both contacts are another outfan (V-)；Two outfans (V+,
V-) it is connected with the input of described post processing circuitry；The unbalanced bridge module (2) is by the 5th resistance (R5), the 6th resistance
(R6), first switch (K1) and second switch (K2) composition, the 5th resistance (R5) and first switch (K1) are connected on charging pile electricity
The positive pole (P+) in source is and earth terminal between；6th resistance (R6) and second switch (K2) are connected on earth terminal with charging pile power supply
Between negative pole (P-)；It is connected between positive pole (P+) and negative pole (P-) of the described detection circuit (A) with charging pile power supply respectively
There are the 3rd switch (K3) and the 4th switch (K4).
2. the charging pile insulation monitoring and warning device that bridge method according to claim 1 is designed, it is characterised in that described rear place
Reason circuit (B) is by the voltage transformation module (3), voltage isolation module (4), signal processing module (5) and communication mould being sequentially connected
Block (6) is constituted；Described first switch (K1), second switch (K2), the 3rd switch (K3) and the 4th switch (K4) be automatically controlled
Switch, and controlled by controller (7), the communication module (6) sets up communication connection with the controller (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620925216.3U CN206020596U (en) | 2016-08-23 | 2016-08-23 | A kind of charging pile insulation monitoring and warning device of bridge method design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620925216.3U CN206020596U (en) | 2016-08-23 | 2016-08-23 | A kind of charging pile insulation monitoring and warning device of bridge method design |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206020596U true CN206020596U (en) | 2017-03-15 |
Family
ID=58250555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620925216.3U Active CN206020596U (en) | 2016-08-23 | 2016-08-23 | A kind of charging pile insulation monitoring and warning device of bridge method design |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206020596U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093739A (en) * | 2016-08-23 | 2016-11-09 | 山东泰开自动化有限公司 | A kind of charging pile insulation monitoring and warning device of special bridge method design |
| CN108957342A (en) * | 2018-07-24 | 2018-12-07 | 欣旺达电动汽车电池有限公司 | A kind of detection circuit and detection method of high-voltage battery system total voltage |
| CN109521277A (en) * | 2018-12-03 | 2019-03-26 | 欣旺达电子股份有限公司 | Insulating properties detection circuit and detection method |
| CN110596559A (en) * | 2019-10-12 | 2019-12-20 | 积成电子股份有限公司 | Time-sharing grounding multi-balance bridge-based direct current bus and feeder line monitoring method |
| CN112526424A (en) * | 2019-09-18 | 2021-03-19 | 宁德时代新能源科技股份有限公司 | Detection method of insulation detection circuit and battery management system |
| US11673482B2 (en) * | 2020-12-18 | 2023-06-13 | Preh Gmbh | Method and charging device for charging a high-voltage battery of an electric vehicle |
| EP4249926A1 (en) * | 2022-03-22 | 2023-09-27 | Delta Electronics Inc. | Insulation resistance detection circuit and method of detecting insulation resistance |
-
2016
- 2016-08-23 CN CN201620925216.3U patent/CN206020596U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093739A (en) * | 2016-08-23 | 2016-11-09 | 山东泰开自动化有限公司 | A kind of charging pile insulation monitoring and warning device of special bridge method design |
| CN108957342A (en) * | 2018-07-24 | 2018-12-07 | 欣旺达电动汽车电池有限公司 | A kind of detection circuit and detection method of high-voltage battery system total voltage |
| CN109521277A (en) * | 2018-12-03 | 2019-03-26 | 欣旺达电子股份有限公司 | Insulating properties detection circuit and detection method |
| CN112526424A (en) * | 2019-09-18 | 2021-03-19 | 宁德时代新能源科技股份有限公司 | Detection method of insulation detection circuit and battery management system |
| CN112526424B (en) * | 2019-09-18 | 2021-09-28 | 宁德时代新能源科技股份有限公司 | Detection method of insulation detection circuit and battery management system |
| US11852670B2 (en) | 2019-09-18 | 2023-12-26 | Contemporary Amperex Technology Co., Limited | Method for monitoring insulation monitoring circuit and battery management system |
| CN110596559A (en) * | 2019-10-12 | 2019-12-20 | 积成电子股份有限公司 | Time-sharing grounding multi-balance bridge-based direct current bus and feeder line monitoring method |
| CN110596559B (en) * | 2019-10-12 | 2021-08-03 | 积成电子股份有限公司 | Time-sharing grounding multi-balance bridge-based direct current bus and feeder line monitoring method |
| US11673482B2 (en) * | 2020-12-18 | 2023-06-13 | Preh Gmbh | Method and charging device for charging a high-voltage battery of an electric vehicle |
| EP4249926A1 (en) * | 2022-03-22 | 2023-09-27 | Delta Electronics Inc. | Insulation resistance detection circuit and method of detecting insulation resistance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206020596U (en) | A kind of charging pile insulation monitoring and warning device of bridge method design | |
| CN106093739A (en) | A kind of charging pile insulation monitoring and warning device of special bridge method design | |
| CN104702208B (en) | Photovoltaic array ground insulation resistance online detecting system for high-power photovoltaic inverter | |
| CN102590676B (en) | Device and method for detecting fault of direct current looped network of direct current power supply system | |
| CN206725709U (en) | A kind of off-board charger insulation detection device | |
| CN204882720U (en) | Intelligent computer direct current system monitoring facilities | |
| CN103454498A (en) | Insulation detection method of electric vehicle power battery pack | |
| CN202735453U (en) | Detection circuit for bus grounding in direct current system | |
| CN108614158A (en) | A kind of electric automobile insulation resistance detection control circuit and its detection method | |
| CN109696582A (en) | Insulation resistance detection circuit and its detection method | |
| CN206710509U (en) | A kind of insulation resistance of DC system observation circuit and system | |
| CN107677882A (en) | A kind of direct-current charging post detecting system and its detection method | |
| CN106997007A (en) | Electric automobile direct-current high-voltage system insulating resistance measurement apparatus and its measuring method | |
| CN103091560A (en) | Double line photovoltaic input insulation resistance detection circuit and detection method | |
| CN103558506B (en) | Non-implanted formula DC system earth fault lookup method and device thereof | |
| CN105842540A (en) | Method for detecting DC bus insulation resistance | |
| CN102721928A (en) | Storage battery parameter monitor and parameter monitoring method | |
| CN106452358A (en) | Insulation-against-ground impedance detection method and detection circuit for photovoltaic cell panel | |
| CN203037745U (en) | Insulation resistance detection circuit of two ways of photovoltaic input | |
| CN203786252U (en) | Electric automobile electrical insulation detection system | |
| CN105092971A (en) | Pure electric high-voltage insulated resistance real-time online detection method | |
| CN106405305A (en) | Zero line open-phase detection circuit and method for detecting open phase of zero line | |
| CN106291282A (en) | The insulation monitoring and warning device of a kind of dynamical system and method | |
| CN207336643U (en) | A kind of electric car insulation detection device | |
| CN109061309A (en) | A kind of car body insulated measurement circuits and measurement method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |