CN208872843U - Non-equilibrium bridge measuring device for electric automobile charging pile Insulation Inspection System - Google Patents
Non-equilibrium bridge measuring device for electric automobile charging pile Insulation Inspection System Download PDFInfo
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- CN208872843U CN208872843U CN201821180569.0U CN201821180569U CN208872843U CN 208872843 U CN208872843 U CN 208872843U CN 201821180569 U CN201821180569 U CN 201821180569U CN 208872843 U CN208872843 U CN 208872843U
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Abstract
The utility model discloses a kind of non-equilibrium bridge measuring devices for electric automobile charging pile Insulation Inspection System, including system dc power supply positive and negative electrode insulation against ground resistance measurement solution value, non-equilibrium bridge measuring circuit includes that nonequilibrium bridge resistance and system power supply put into/exit switch, switching switch is set between nonequilibrium bridge resistance and arm resistance, switching two stationary contact of switch is mutually electrically connected with the bridge two-end-point of nonequilibrium bridge resistance respectively, and switching switch movable contact point is electrically connected with arm resistance；System dc power supply includes the positive and negative bus of system dc power supply to ground resistance to ground resistance, positive and negative bus is to setting the positive and negative sample detecting terminal over the ground of system power supply in ground resistance, bridge arm voltage sample detecting terminal is set on arm resistance, bridge arm voltage difference sample detecting terminal or test point when setting neutral gear on two stationary contacts.Charging pile insulating properties detection is improved, can carry out operating using charging pile after meeting insulation performance；Structure is simple, low manufacture cost.
Description
Technical field
The utility model relates to a kind of electric automobile charging piles, are used in more particularly, to one kind to electric automobile charging pile
Carry out the electric automobile charging pile insulation detection device of Insulation monitoring.
Background technique
With new energy field ev industry rapidly develop, electric automobile charging pile be increasingly becoming affect it is whole
One of bottleneck factor of a ev industry development；And due to electric automobile charging pile would generally be placed on it is various multiple
In heterocycle border, mop floor because of cable abrasion, internal components aging etc. are easy in the long-term use process after charging pile comes into operation
A variety of causes causes system insulation reduction, is easy to jeopardize the person and equipment using safe because insulation performance reduces, therefore fill
Electric stake must carry out Insulation monitoring before charging, and detection data, which is met the requirements, can carry out charging operations.
Utility model content
The utility model is that there is be easy to mop floor because of cable in long-term use process for the existing electric automobile charging pile of solution
The a variety of causes such as abrasion, internal components aging cause system insulation reduction, be easy because insulation performance reduce due to jeopardize the person and
A kind of insulating properties detection of the raising charging pile that equipment is provided using the statuses such as safe before use of charging improves charging pile
Charging safety and reliability, can charging pile using charging before insulation performance is detected, detection data meet insulation
It can carry out surveying using the non-equilibrium bridge for electric automobile charging pile Insulation Inspection System that charging pile operates after performance requirement
Measure circuit.
The utility model is used to solve above-mentioned technical problem the specific technical proposal is: a kind of fill for electric car
The non-equilibrium bridge measuring device of electric stake Insulation Inspection System, including the positive and negative bus of system dc power supply, it is characterised in that: also wrap
Include non-equilibrium bridge measuring circuit and system dc power supply positive and negative electrode insulation against ground resistance measurement solution value, non-equilibrium bridge measurement electricity
Road includes nonequilibrium bridge resistance, arm resistance, system dc power supply is switched to ground resistance, switching and system power supply puts into/moves back
Switch out, switching switch be equipped between nonequilibrium bridge resistance and arm resistance, switch two stationary contacts of switch respectively with it is non-flat
The bridge two-end-point of weighing apparatus bridge resistor is mutually electrically connected, and the movable contact and arm resistance for switching switch are electrically connected, and arm resistance is another
End is electrically connected with system dc power ground；System dc power supply includes system dc power supply positive bus-bar to ground resistance to ground resistance
With negative busbar to ground resistance, positive bus-bar is equipped with system power supply just sample detecting terminal or test point over the ground to ground resistance, bears mother
Line is equipped with system power supply negative sample detecting terminal or test point over the ground to ground resistance, and bridge arm voltage sampling inspection is set on arm resistance
Terminal or test point are surveyed, bridge arm voltage difference sample detecting terminal or test point when setting neutral gear on two stationary contacts of switch are switched,
System power supply, which is in series with, between non-equilibrium bridge measuring circuit and the positive and negative bus of system dc power supply puts into/exit switch.Raising is filled
Insulating properties detection of the electric stake before use of charging, improves the charging safety and reliability of charging pile, can use in charging pile
Insulation performance is detected before charging, detection data, which meets after insulation performance requires, can carry out operating using charging pile；Knot
Structure is simple, low manufacture cost, stable and reliable operation.
Preferably, the nonequilibrium bridge resistance includes first resistor, second resistance, 3rd resistor and the 4th electricity
Resistance, wherein first resistor and second resistance are connected in series, the other end of first resistor and be located at system power supply put into/exit switch after
Grade system dc power supply positive bus-bar be electrically connected, the other end of second resistance and be located at system power supply put into/exit switch after
The system dc power supply negative busbar of grade is electrically connected；3rd resistor and the 4th resistance are connected in series, the other end of 3rd resistor with set
System power supply put into/exit switch rear class system dc power supply positive bus-bar be electrically connected, the other end of the 4th resistance with set
It is electrically connected in the system dc power supply negative busbar that system power supply put into/exited switch rear class；First resistor and second resistance phase
Concatenated series connection node is electrically connected with the first stationary contact in two stationary contacts of switching switch, 3rd resistor and the 4th resistance
The series connection node being connected in series is electrically connected with the second stationary contact in two stationary contacts of switching switch.Improve nonequilibrium bridge electricity
Bridge arm voltage difference sample detecting validity when neutral gear in resistance.
Preferably, the system dc power supply positive bus-bar puts into/exits with system power supply is located to ground resistance one end
The system dc power supply positive bus-bar of switch rear class is electrically connected, and the other end is electrically connected with power ground；The negative mother of system dc power supply
Line to ground resistance one end be located at system power supply put into/exit switch rear class system dc power supply negative busbar be electrically connected, separately
One end is electrically connected with power ground.Improve the positive and negative sample detecting validity over the ground of system power supply.
The beneficial effects of the utility model are: improving insulating properties detection of the charging pile before use of charging, charging is improved
The charging safety and reliability of stake can detect insulation performance before charging pile is using charging, and detection data meets exhausted
It can carry out operating using charging pile after edge performance requirement；Structure is simple, low manufacture cost, stable and reliable operation.
Detailed description of the invention:
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is structure of the utility model for the non-equilibrium bridge measuring circuit of electric automobile charging pile Insulation Inspection System
Schematic diagram.
Specific embodiment
In embodiment shown in FIG. 1, a kind of non-equilibrium bridge measurement dress for electric automobile charging pile Insulation Inspection System
Set, including system dc power supply positive bus-bar U+ and negative busbar U-, further include non-equilibrium bridge measuring circuit and system dc power supply just
Pole insulation against ground resistance measurement solution value RX and cathode insulation against ground resistance measurement solution value RY, non-equilibrium bridge measuring circuit include
Nonequilibrium bridge resistance, arm resistance RS, system dc power supply put into/exit out to ground resistance, switching switch K and system power supply
Close QK, be electrically connected between nonequilibrium bridge resistance and arm resistance switching switch K, switching switch K two stationary contacts respectively with
The bridge two-end-point of nonequilibrium bridge resistance is mutually electrically connected, and the movable contact of switching switch K is electrically connected with arm resistance RS, bridge arm electricity
The resistance RS other end is electrically connected with system dc power ground；System dc power supply includes system dc power supply positive bus-bar to ground resistance
To ground resistance R5 and negative busbar to ground resistance R6, positive bus-bar is electrically connected with system power supply to the both ends ground resistance R5, and just sampling is being examined over the ground
Terminal or test point U+d are surveyed, negative busbar is electrically connected with system power supply to ground resistance both ends and bears sample detecting terminal or detection over the ground
Point U-d, the both ends arm resistance RS are electrically connected bridge arm voltage sample detecting terminal or test point U2, switch two stationary contacts of switch
Bridge arm voltage difference sample detecting terminal or test point U1, non-equilibrium bridge measuring circuit and system are straight when upper parallel connection is electrically connected with neutral gear
System power supply, which is in series with, between the positive and negative bus in galvanic electricity source puts into/exit switch QK.Nonequilibrium bridge resistance includes first resistor
R1, second resistance R2,3rd resistor R3 and the 4th resistance R4, wherein first resistor and second resistance are connected in series, first resistor
The other end be located at system power supply put into/exit switch rear class system dc power supply positive bus-bar be electrically connected, second resistance
The other end be located at system power supply put into/exit switch rear class system dc power supply negative busbar be electrically connected；3rd resistor and
4th resistance is connected in series, and the other end of 3rd resistor puts into/exit the system dc power supply of switch rear class with system power supply is located at
Positive bus-bar is electrically connected, and the other end of the 4th resistance puts into/exit the system dc power supply of switch rear class with system power supply is located at
Negative busbar is electrically connected；The in two stationary contacts of series connection node that first resistor and second resistance are connected in series and switching switch
One stationary contact is electrically connected, in two stationary contacts of series connection node and switching switch that 3rd resistor and the 4th resistance are connected in series
Second stationary contact is electrically connected.System dc power supply positive bus-bar is to ground resistance one end and is located at system power supply and puts into/exit switch
The system dc power supply positive bus-bar of rear class is electrically connected, and the other end is electrically connected with power ground；System dc power supply negative busbar pair
Ground resistance one end be located at system power supply put into/exit switch rear class system dc power supply negative busbar be electrically connected, the other end
It is electrically connected with power ground.
The solution formula of system dc power supply positive and negative electrode insulation against ground resistance measurement solution value are as follows:
U+d1/(Rx//R5) + U-d1/(Ry//R6) + U21/RS = 0
U+d2/(Rx//R5) + U-d2/(Ry//R6) + U22/RS = 0
U=U1/ (R2/ (R1+R2)-R4/ (R3+R4)) in above formula, in which: U is system voltage, and RX is system dc power supply
Positive insulation against ground resistance measurement solution value, RY are system dc positive pole insulation against ground resistance measurement solution value, two formulas connection
Vertical solve obtains RX value and RY value；
U+d1 be connect system power supply put into/exit switch after, the movable contact for switching switch is switched to and two stationary contacts
In the first stationary contact system power supply that sample detecting obtains when being in contact just sample detecting value, U-d1 are connection system electricity over the ground
Source puts into/exit switch after, the movable contact for switching switch, which is switched to when being in contact with the first stationary contact in two stationary contacts, to be adopted
The negative sample detecting value over the ground of the detected system power supply of sample, U21 be connect system power supply put into/exit switch after, switching is opened
The movable contact of pass is switched to the bridge arm voltage sampling that sample detecting obtains when being in contact with the first stationary contact in two stationary contacts
Detected value, U1 be connect system power supply put into/exit switch after, switch switch movable contact be switched to in two stationary contacts
Bridge arm voltage difference sample detecting value when the neutral gear that sample detecting obtains when the first stationary contact is in contact；U+d2 is to connect system power supply
Put into/exit switch after, the movable contact for switching switch is switched to sampling when being in contact with the second stationary contact in two stationary contacts
Detected system power supply just sample detecting value over the ground, U-d2 be connect system power supply put into/exit switch after, switching switch
Movable contact to be switched to the system power supply that sample detecting when being in contact with the second stationary contact in two stationary contacts obtains negative over the ground
Sample detecting value, U22 be connect system power supply put into/exit switch after, switch switch movable contact be switched to two it is quiet
The bridge arm voltage sample detecting value that sample detecting obtains when the second stationary contact in contact is in contact；R1~R4 is nonequilibrium bridge
Resistance, RS are arm resistance, and R5 is system dc power supply positive bus-bar to ground resistance, and R6 is that system dc power supply negative busbar is electric over the ground
Resistance.
It is solved according to system dc power supply positive and negative electrode insulation against ground resistance measurement solution value and obtains insulation resistance data value,
Insulation resistance data value calculating formula are as follows: R=RX/U or R=RY/U determines whether charging operations according to insulation resistance data value.
Insulation resistance data value is divided into third gear: 500 Ω of R >/V, 100 Ω/V < R≤500 Ω/V and R≤100 Ω/V, and in R≤100
When Ω/V charging pile execute stop or forbid charging operations (processing and judgement execute operation and see the table below ----insulation obtained hinders
The data of Value Data and judge shown in table).Switching switch K has left, center, right third gear switching switch.
In use, charging pile single chip part is connect with non-equilibrium bridge measuring device with phase control, single chip part master
Control the on-off of QK, K, the sampling of U+d/U-d/U1/U2 and data operation and data transmission.CPU connects a grade system command and connects
After logical QK, U1 is sampled, K access 1, samples U2, U+d1, U-d1 after 1 second, and K is switched to 2 after 1 second, samples U2, U+d2, U-d2, meter
It calculates transmission and disconnects QK by instruction requirement after.Detection finishes.
Claims (3)
1. a kind of non-equilibrium bridge measuring device for electric automobile charging pile Insulation Inspection System, including system dc power supply
Positive and negative bus, it is characterised in that: further include non-equilibrium bridge measuring circuit and system dc power supply positive and negative electrode insulation against ground resistance
Measure solution value, non-equilibrium bridge measuring circuit include nonequilibrium bridge resistance, arm resistance, system dc power supply to ground resistance,
Switching switch and system power supply put into/exit switch, and switching switch is equipped between nonequilibrium bridge resistance and arm resistance, and switching is opened
Two stationary contacts closed are mutually electrically connected with the bridge two-end-point of nonequilibrium bridge resistance respectively, switch the movable contact and bridge arm electricity of switch
Resistance is electrically connected, and the arm resistance other end is electrically connected with system dc power ground；System dc power supply includes being to ground resistance
To ground resistance and negative busbar to ground resistance, positive bus-bar is equipped with system power supply to ground resistance and is just adopting over the ground system DC power supply positive bus-bar
Sample detection terminal or test point, negative busbar are equipped with system power supply negative sample detecting terminal or test point over the ground, bridge to ground resistance
Bridge arm voltage sample detecting terminal or test point are set on arm resistance, switch bridge arm voltage when setting neutral gear on two stationary contacts of switch
Poor sample detecting terminal or test point are in series with system between non-equilibrium bridge measuring circuit and the positive and negative bus of system dc power supply
Power supply puts into/exits switch.
2. the non-equilibrium bridge measuring device described in accordance with the claim 1 for electric automobile charging pile Insulation Inspection System,
Be characterized in that: the nonequilibrium bridge resistance includes first resistor, second resistance, 3rd resistor and the 4th resistance, wherein
One resistance and second resistance are connected in series, and the other end of first resistor puts into/exit the system for switching rear class with system power supply is located at
DC power supply positive bus-bar is electrically connected, and the other end of second resistance puts into/exit the system for switching rear class with system power supply is located at
DC power supply negative busbar is electrically connected；3rd resistor and the 4th resistance are connected in series, and the other end of 3rd resistor is electric with the system that is located at
The system dc power supply positive bus-bar that source put into/exited switch rear class is electrically connected, and the other end of the 4th resistance is electric with the system that is located at
The system dc power supply negative busbar that source put into/exited switch rear class is electrically connected；The string that first resistor and second resistance are connected in series
Interlink point is electrically connected with the first stationary contact in two stationary contacts of switching switch, what 3rd resistor and the 4th resistance were connected in series
Series connection node is electrically connected with the second stationary contact in two stationary contacts of switching switch.
3. the non-equilibrium bridge measuring device described in accordance with the claim 1 for electric automobile charging pile Insulation Inspection System,
Be characterized in that: the system dc power supply positive bus-bar is to ground resistance one end and is located at system power supply and puts into/exit switch rear class
System dc power supply positive bus-bar be electrically connected, the other end is electrically connected with power ground；System dc power supply negative busbar is electric over the ground
Resistance one end is electrically connected with the system dc power supply negative busbar for being located at system power supply and put into/exit switch rear class, the other end with it is electric
Source it is electrically connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821180569.0U CN208872843U (en) | 2018-07-25 | 2018-07-25 | Non-equilibrium bridge measuring device for electric automobile charging pile Insulation Inspection System |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821180569.0U CN208872843U (en) | 2018-07-25 | 2018-07-25 | Non-equilibrium bridge measuring device for electric automobile charging pile Insulation Inspection System |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474501A (en) * | 2020-05-29 | 2020-07-31 | 上海挚达科技发展有限公司 | Fill ground signal detection circuitry of electric pile |
| CN112285500A (en) * | 2020-10-20 | 2021-01-29 | 深圳英飞源技术有限公司 | Insulation detection circuit and control method thereof |
| CN112578186A (en) * | 2020-12-21 | 2021-03-30 | 山东积成智通新能源有限公司 | Direct-current insulation detection system and device and balance bridge measurement method |
| CN114362333A (en) * | 2020-10-13 | 2022-04-15 | 比亚迪股份有限公司 | Charging device and vehicle with same |
-
2018
- 2018-07-25 CN CN201821180569.0U patent/CN208872843U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474501A (en) * | 2020-05-29 | 2020-07-31 | 上海挚达科技发展有限公司 | Fill ground signal detection circuitry of electric pile |
| CN111474501B (en) * | 2020-05-29 | 2021-03-02 | 上海挚达科技发展有限公司 | Fill ground signal detection circuitry of electric pile |
| CN114362333A (en) * | 2020-10-13 | 2022-04-15 | 比亚迪股份有限公司 | Charging device and vehicle with same |
| CN112285500A (en) * | 2020-10-20 | 2021-01-29 | 深圳英飞源技术有限公司 | Insulation detection circuit and control method thereof |
| CN112578186A (en) * | 2020-12-21 | 2021-03-30 | 山东积成智通新能源有限公司 | Direct-current insulation detection system and device and balance bridge measurement method |
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