CN207366656U - A kind of off-board charging machine detecting device of electric automobile - Google Patents
A kind of off-board charging machine detecting device of electric automobile Download PDFInfo
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- CN207366656U CN207366656U CN201721228018.2U CN201721228018U CN207366656U CN 207366656 U CN207366656 U CN 207366656U CN 201721228018 U CN201721228018 U CN 201721228018U CN 207366656 U CN207366656 U CN 207366656U
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- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 claims description 3
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Abstract
A kind of off-board charging machine detecting device of electric automobile, including exchange detection unit, DC detecting unit, D/A converter, load simulation unit, inversion unit, switching-in control unit, DSP and display.The utility model can simulate the actual charging process of electric automobile, detect the operating error and charge efficiency of off-board charger, the exchange of also controllable inverter output is grid-connected with AC network to complete, and reduces the electric energy consumed during detection.
Description
Technical field
A kind of off-board charging machine detecting device of electric automobile is the utility model is related to, belongs to Electric Energy Metering Technology field.
Background technology
With the fast development of China's economy, auto industry achieves quick development.Traditional automobile is made using oil
For fuel, easily cause the pollution of environment.Electric automobile substitution orthodox car becomes trend, but the construction of charging pile is serious
Limit the popularization of electric automobile.At present, the charging pile construction in China is in developing stage, and charging pile can by its installation site
It is divided into two kinds：One kind is Vehicular charger, and charging pile need to only provide AC power, and the fairing in electric car, which will exchange, to be changed
Charge a battery into direct current；Another kind is non-Vehicular charger, and power grid exchange is converted into straight by the fairing in charging pile
Stream, charges directly to electronic in-vehicle secondary battery, and the charging interval is shorter.
Current various standards that are established and formulating are made that requirement to the performance of off-board charger, and propose
Corresponding detection method.During detection, need to off-board charger export survey access power load, generally using electric automobile,
Power battery pack, DC Electronic Loads or ohmic load.When no actual electric automobile charges, DC Electronic Loads can be used
Or ohmic load, its impedance and power should be able to be adjusted, with analog charge process.Constant-current charge is often first used during charging, works as electricity
Pressure is transferred to second stage and carries out constant-voltage charge when reaching predetermined value, electric current is gradually reduced at this time；Drop to when charging current reaches
When zero, storage battery is completely filled with, and DC Electronic Loads or ohmic load can consume substantial amounts of energy in detection.
The content of the invention
The purpose of this utility model is, for problem existing for existing off-board charging machine testing, the utility model proposes
A kind of off-board charging machine detecting device of electric automobile.
The technical solution that the utility model is realized is as follows：
A kind of off-board charging machine detecting device of electric automobile includes exchange detection unit, DC detecting unit, D/A conversions
Device, load simulation unit, inversion unit, switching-in control unit, DSP and display.
The input terminal connection power grid connection of off-board charger, the alternating current that off-board charger provides power grid are converted into
Direct current output；The load simulation unit is connected with off-board charger DC output end, to simulate electric automobile charging process；
The inversion unit input terminal is connected with the output terminal of load simulation unit, and the output terminal and switching-in control unit of inversion unit are defeated
Enter end connection, inversion unit is by the DC inversion that fictitious load unit exports into exchange；The DSP output terminals and load simulation list
Member connection, controls the input voltage and input current of load simulation unit, to simulate the different impedances of off-board charger access
With operating mode during power actual loading；Another output terminal of DSP is connected with switching-in control unit input terminal, to switching-in control unit
Grid-connected reference value (amplitude, phase and frequency) is provided, switching-in control unit output is connected with AC network；When meeting grid-connected requirement
When, the AC signal feedback that inverter exports reduces electric energy loss during detection to power grid；Switching-in control unit connects with inverter
Connect, when being unsatisfactory for grid-connected require, control the output of inverter, adjusting amplitude, frequency and phase are until meet grid-connected requirement.
The exchange detection unit input terminal is connected with off-board charger exchange input side；Exchange detection unit electric current
The electric current of mutual inductor or copper-manganese electrical resistance collection exchange side, with voltage transformer or divider resistance to gather the voltage of exchange side；Directly
The input terminal of stream detection unit is connected with the DC output end of off-board charger, DC detecting unit DC current transformer
Or current divider collection DC side electric current, gather DC voltage with DC voltage transformer or divider resistance；D/A converter two
Input terminal is connected with exchange detection unit output terminal and DC detecting unit output terminal respectively, and AC and DC analog signal is turned
Change digital signal into；The output terminal of D/A converter is connected with DSP, and DSP draws off-board charger by handling and calculating
Operating error and efficiency；The output terminal of display and DSP connect, and the operating error detected and charge efficiency data are shown.
The beneficial effects of the utility model are that the utility model provides a kind of off-board charger detection method of electric automobile
And device, the actual charging process of electric automobile can be simulated, detects the operating error and charge efficiency of off-board charger, it is also controllable
The exchange of inverter output processed and AC network are grid-connected, reduce the electric energy consumed during detection.
Brief description of the drawings
Fig. 1 is the apparatus structure block diagram of the utility model.
Embodiment
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings：
It is the principle of device schematic diagram of the utility model as shown in Figure 1, a kind of off-board charging of electric automobile of the present embodiment
Machine detecting device, including：Exchange detection unit, DC detecting unit, D/A converter, load simulation unit, inversion unit, conjunction
Lock control unit, DSP and display.
DSP provides grid-connected reference value (phase and frequency), switching-in control unit output and alternating current to switching-in control unit
Net connection；When meeting grid-connected require, the AC regeneration that inverter exports reduces electric energy loss during detection to power grid；Close a floodgate
Control unit is connected with inverter, when being unsatisfactory for grid-connected require, controls amplitude, the phase and frequency of inverter output signal,
Until meeting grid-connected requirement.
DSP outputs signal to load simulation unit, the input terminal voltage and electric current of load simulation unit is adjusted, to meet to survey
Examination demand；According to the off-board charger vertification regulation of electric automobile, output voltage U range is：Umin≤U≤Umax, wherein UminWith
UmaxIt is charger rated output voltage range lower limit and the upper limit respectively；Output current I scopes are Imin≤I≤Imax, wherein Imin
It is minimum current, ImaxIt is maximum current：The input terminal of DC detecting unit is connected with the DC output end of off-board motor,
DC detecting unit DC current transformer or current divider collection DC side electric current, with DC voltage transformer or divider resistance
Gather DC voltage；D/A converter input terminal is connected with DC detecting unit output terminal, and DC simulation signal is converted into counting
Word signal；The output terminal of D/A converter is connected with DSP；DSP calculates the DC voltage collected and current signal processing, can
Obtain DC output power PzWith the direct current output energy value E measured in a period of time Δ t；E and same period Δ t Nei Feiche
Carry the energy value E after charger direct current energy pulse output conversionxCompare, can obtain operating errorWork
Making error can be shown by display；If operating error meets regulatory requirements, it is qualified to be detected charger；If operating error is discontented with
Sufficient regulatory requirements, then it is unqualified to be detected charger.
Exchange detection unit input terminal is connected with off-board motor exchange input side；Exchange detection unit Current Mutual Inductance
The electric current of device or copper-manganese electrical resistance collection exchange side, with voltage transformer or divider resistance to gather the voltage of exchange side；D/A is changed
Another input terminal of device is connected with exchange detection unit output terminal, and AC analogue signal is converted into digital signal；D/A converter
Output terminal be connected with DSP, DSP obtains exchange input active-power P by handling and calculatej, and then charge efficiency can be obtained
Undeclared part involved in the utility model is same as the prior art or is realized using the prior art.
Claims (2)
1. a kind of off-board charging machine detecting device of electric automobile, it is characterised in that described device includes：Exchange detection unit,
DC detecting unit, D/A converter, load simulation unit, inversion unit, switching-in control unit, DSP and display；
The input terminal connection power grid connection of off-board charger, the alternating current that off-board charger provides power grid are converted into direct current
Output；The load simulation unit is connected with off-board charger DC output end, to simulate electric automobile charging process；It is described
Inversion unit input terminal is connected with the output terminal of load simulation unit, output terminal and the switching-in control unit input terminal of inversion unit
Connection, inversion unit is by the DC inversion that fictitious load unit exports into exchange；The DSP output terminals connect with load simulation unit
Connect, control the input voltage and input current of load simulation unit, to simulate the different impedances of off-board charger access and work(
Operating mode during rate actual loading；Another output terminal of DSP is connected with switching-in control unit input terminal, is provided to switching-in control unit
Grid-connected amplitude, phase and frequency, switching-in control unit output are connected with AC network；When meeting grid-connected require, inverter is defeated
The AC signal feedback gone out reduces electric energy loss during detection to power grid；Switching-in control unit is connected with inverter, when being unsatisfactory for
Grid-connected to control the output of inverter when requiring, adjusting amplitude, frequency and phase are until meet grid-connected requirement.
A kind of 2. off-board charging machine detecting device of electric automobile according to claim 1, it is characterised in that the exchange
Detection unit input terminal is connected with off-board charger exchange input side；Exchange detection unit Current Transformer or copper-manganese resistance
The electric current of exchange side is gathered, with voltage transformer or divider resistance to gather the voltage of exchange side；The input of DC detecting unit
End is connected with the DC output end of off-board charger, DC detecting unit DC current transformer or current divider collection direct current
Side electric current, DC voltage is gathered with DC voltage transformer or divider resistance；Two input terminals of D/A converter respectively with friendship
Stream detection unit output terminal is connected with DC detecting unit output terminal, and AC and DC analog signal is converted into digital signal；
The output terminal of D/A converter is connected with DSP, and DSP draws the operating error and effect of off-board charger by handling and calculating
Rate；The output terminal of display and DSP connect, and the operating error detected and charge efficiency data are shown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721228018.2U CN207366656U (en) | 2017-09-23 | 2017-09-23 | A kind of off-board charging machine detecting device of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721228018.2U CN207366656U (en) | 2017-09-23 | 2017-09-23 | A kind of off-board charging machine detecting device of electric automobile |
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| CN207366656U true CN207366656U (en) | 2018-05-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677905A (en) * | 2017-09-23 | 2018-02-09 | 国网江西省电力公司电力科学研究院 | A kind of off-board charging machine detecting device of electric automobile |
| CN109188272A (en) * | 2018-08-15 | 2019-01-11 | 国网江西省电力有限公司电力科学研究院 | A kind of electric car non-on-board charger circulation detection device and its method of calibration |
-
2017
- 2017-09-23 CN CN201721228018.2U patent/CN207366656U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677905A (en) * | 2017-09-23 | 2018-02-09 | 国网江西省电力公司电力科学研究院 | A kind of off-board charging machine detecting device of electric automobile |
| CN109188272A (en) * | 2018-08-15 | 2019-01-11 | 国网江西省电力有限公司电力科学研究院 | A kind of electric car non-on-board charger circulation detection device and its method of calibration |
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