CN203838264U - Subway vehicle battery charger test bench - Google Patents
Subway vehicle battery charger test bench Download PDFInfo
- Publication number
- CN203838264U CN203838264U CN201420200901.0U CN201420200901U CN203838264U CN 203838264 U CN203838264 U CN 203838264U CN 201420200901 U CN201420200901 U CN 201420200901U CN 203838264 U CN203838264 U CN 203838264U
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- 238000012360 testing method Methods 0.000 title claims abstract description 79
- 238000001514 detection method Methods 0.000 claims abstract description 29
- 238000002474 experimental method Methods 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000001131 transforming effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model provides a subway vehicle battery charger test bench which comprises a control cabinet, a charger and the test bench. A voltage and current detection circuit which is used for detecting the output current and the output voltage of the charger, a transformer circuit, an alternating current to direct current circuit which is used for converting alternating current to direct current, and a relay control circuit which controls the alternating current to direct current circuit are arranged in the control cabinet. The control cabinet is electrically connected with the charger through the test bench. The voltage and current detection circuit comprises a voltage sensor which is used for testing the voltage magnitude, a current sensor which is sued for testing the current magnitude, a voltage digital meter and a current digital meter. The voltage sensor is connected with the voltage digital meter. The current sensor is connected with the current digital meter. According to the subway vehicle battery charger test bench provided by the utility model, the battery charger can be tested; the test reliability of the battery charger is enhanced; the battery charger can be rapidly repaired; and the work efficiency is improved.
Description
Technical field
The utility model relates to a kind of railcar battery charger test board, belongs to railcar battery charger characteristic test technical field.
Background technology
The battery charger of existing railcar producer does not have special test equipment, cause on-site maintenance difficulty, and peripheral wiring is many during entrucking, narrow space, dismounting once consumes a large amount of time, if can not be in time that charging set fault handling is good, to have a strong impact on correct in car, and entrucking test is difficult to repair completely charging set, and personnel and equipment are formed to very large potential safety hazard, there is no in the market the test board for the special test of railcar SMA battery charger yet, how battery charger is detected and makes it obtain fast and safely keeping in repair to be to be badly in need of at present a problem solving.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of railcar battery charger test board, can test battery charger, and can directly by digital watch, to the electric current of charging set and voltage, carry out reading, strengthened the reliability of battery charger test, and make battery charger can access rapid-maintenance, improved work efficiency.
For solving above technical matters, the utility model has adopted following technical scheme:
A kind of railcar battery charger test board, comprise switch board, charging set and test board, described switch board inside is provided with for detection of the output current of charging set and the voltage and current detection circuit of output voltage, transforming circuit, for being converted to galvanic interchange, alternating current turns DC circuit, control and exchange the control relay circuit that turns DC circuit, described switch board is electrically connected to charging set by test board, described voltage and current detection circuit comprises the voltage sensor for test voltage size, current sensor for measuring current size, voltage digital gauge outfit and current digital gauge outfit, described voltage sensor is connected with voltage digital gauge outfit, described current sensor is connected with current digital gauge outfit.
Described voltage and current detection circuit comprises the first circuit module, described the first circuit module output dc voltage scope is 1.2V-23V, connect respectively 1.2V-23V joint, two 0V joints, 1.2V joint, described 1.2V-23V joint is connected regulated power supply jack with 0V joint, and described 0V joint and 1.2V joint connection network are pressed signal jack.
Described 1.2V-23V joint is by built-in potential device regulation output voltage.
Described interchange turns DC circuit and comprises transformer, rectifier bridge, discharge resistance and filter capacitor, and the output terminal of described transformer is connected with the input end of rectifier bridge, and the output terminal of described rectifier bridge is connected with filter capacitor and the discharge resistance being connected in parallel.
The output terminal of described rectifier bridge is also connected with voltage sensor and the current sensor being connected in parallel, and described voltage sensor, current sensor, filter capacitor and discharge resistance are connected in parallel.
Described control relay circuit comprises the first branch road, the second branch road, the 3rd branch road, the 4th branch road and the 5th branch road being connected in parallel, and described the first branch road connects detection signal jack; Described the second branch road connects high-pressure and low-pressure test selection switch, and described high-pressure and low-pressure test selection switch one end is Hi-pot test circuit, and the other end is low voltage experiment circuit; Described the 3rd branch road comprises the tenth relay and first pilot lamp of mutual series connection; Described the 4th branch road comprises successively the 11 timing relay, high pressing button, the tenth relay and the 12 relay and in parallel with the 11 timing relay, high pressing button, the tenth relay button that tightly stops of series connection; What described the 5th branch road comprised successively series connection tightly stops button, the 11 timing relay, cabinet door switch and the 13 relay.
Described Hi-pot test circuit comprises the tenth relay and the 11 timing relay that the high pressing button, the high pressure that are connected in series divide button, the 13 relay, the 12 relay, the tenth relay and divide button, the 13 relay, the 12 relay, the tenth relay to be connected in parallel with high pressing button, high pressure.
Described Hi-pot test circuit also comprises the second pilot lamp, and described the second pilot lamp and described the tenth relay are connected in parallel.
Described high pressing button and high pressure divide contact and the contact between the tenth relay and the 11 timing relay between button to pass through wire short circuit.
Described low voltage experiment circuit comprises the 20 relay.
Adopt above technical scheme, the obtained beneficial effect of the utility model is:
(1) test board has fully met current needs in the process of design, test board is provided with low voltage experiment and Hi-pot test, while selecting low voltage experiment, output has the power supply of control, net to press signal and detection signal, and while selecting Hi-pot test, output has the power supply of control, high-voltage power supply;
(2) the voltage swing display unit while being provided with high pressure and size of current display unit, easy to operate and intuitively quick;
(3) circuit protection device is set, utilizes relay circuit to control, be provided with emergency warning lamp prompting, automatic discharge circuit and safety protective circuit, make test board safe and reliable.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, technology of the present utility model is described in further detail:
Fig. 1 is the front view of the test board of the utility model railcar battery charger;
Fig. 2 is the right view of switch board in the test board of the utility model railcar battery charger;
Fig. 3 is that in the utility model switch board, electric current and voltage detects and the schematic diagram of power-switching circuit;
Fig. 4 exchanges the schematic diagram that turns DC circuit in the utility model switch board;
Fig. 5 is the schematic diagram of the utility model switch board repeat circuit control circuit.
Embodiment
As shown in figures 1 and 3, a kind of railcar battery charger test board, comprise switch board 1, charging set 2 and test board 3, described switch board 1 inside is provided with for detection of the output current of charging set 2 and the voltage and current detection circuit of output voltage, transforming circuit, for being converted to galvanic interchange, alternating current turns DC circuit, control and exchange the control relay circuit that turns DC circuit, described switch board 1 is electrically connected to charging set 3 by test board 2, described voltage and current detection circuit comprises the voltage sensor 27 for test voltage size, current sensor 28 for measuring current size, voltage digital gauge outfit 30 and current digital gauge outfit 31, described voltage sensor 27 is connected with voltage digital gauge outfit 30, described current sensor 28 is connected with current digital gauge outfit 31.
As depicted in figs. 1 and 2, on the panel in switch board 1 front, be provided with electric current display screen 4, voltage display screen 5, tightly stop button 6, + 24V direct current jack 7,-24V direct current jack 8, control supply hub 9, detection signal jack 10, regulated power supply jack 11, net is pressed signal jack 12, total power switch 13, high-pressure and low-pressure test selection switch 14, control power switch 15, high pressing button 16 and high pressure divide button 17, press high pressing button 16 and can obtain high tension voltage, can carry out Hi-pot test, pressing high pressure divides button 17 can obtain low voltage voltage, can carry out low voltage experiment, on the panel of switch board 1 side, be provided with emergency warning lamp 18, high positive pressure jack 23, the negative jack 24 of high pressure and earth jack 25, switch board 1 inside is provided with voltage and current detection circuit, power-switching circuit, interchange turns DC circuit and control relay circuit, charging set 2 comprises the inner ST132 plate 19 of charging set, detection signal patch panel 20 and charging set patch panel 21, is provided with test board patch panel 22 on test board 3, described electric current display screen 4, voltage display screen 5, + 24V direct current jack 7,-24V direct current jack 8, regulated power supply jack 11, net presses signal jack 12 all to access voltage and current detection circuit and power-switching circuit, emergency warning lamp 18, high positive pressure jack 23, the negative equal incoming transport of jack 24 of high pressure turns DC circuit, tightly stop button 6, control supply hub 9, detection signal jack 10, total power switch 13, high-pressure and low-pressure test selection switch 14, control power switch 15, high pressing button 16 and high pressure divide button 17 equal cut-in relay control circuit, test board patch panel 22 is identical with the binding post of charging set patch panel 21, switch board 1 is connected with charging set 2 by the test board patch panel 22 on test board 3.
As shown in Figure 3, voltage and current detection circuit in switch board 1 and power-switching circuit comprise second circuit module 26, voltage sensor 27, current sensor 28, tertiary circuit module 32, the first circuit module 29, the first circuit module 29 changes direct current 1.2V-23V circuit module into for direct current 24V, second circuit module 26 changes direct current +/-24V circuit module into for direct current 110V, tertiary circuit module is that direct current 24V changes direct current 5V circuit module into, two input ends of direct current 110V power supply access second circuit module 26, the output terminal of second circuit module 26 connects direct current+24V joint, 0V joint and direct current-24V joint, after these three joints, circuit is divided into two parts:
A part is for power supply conversion, direct current+24V joint and be connected+24V of 0V joint direct current jack 7, direct current-24V joint and be connected-24V of 0V joint direct current jack 8, direct current+24V joint is connected two input ends of the first circuit module 29 with 0V joint, the first circuit module 29 connects four lines, wherein two connect direct current 1.2V-23V joint and 0V joint, direct current 1.2V-23V joint is connected regulated power supply jack 11 with 0V joint, described 1.2V-23V joint is by built-in potential device regulation output voltage, another two lines connect direct current 1.2V joint and 0V joint, direct current 1.2V joint is connected respectively the rear connection network of relay K 20 with 0V joint and presses signal jack 12.
Utilize power-switching circuit can access low-tension supply, direct current 110V power supply is the Switching Power Supply of alternating current 220V conversion, maximum current 3A is provided, direct current +/-24V is that direct current 110V changes by second circuit module 26, direct current 1.2V-23V is that direct current 24V changes by the first circuit module 29, wherein +/-24V power supply is that Pang Badi vehicle MCM controls power supply, the detection signal of direct current 1.2V during as low voltage experiment, and variable DC voltage 1.2V-23V is self-control regulated power supply.
Another part is for powering to voltage sensor 27 and current sensor 28, three joints that wherein second circuit module 26 connects connect respectively voltage sensor 27 and current sensor 28, voltage sensor 27 is connected with voltage digital gauge outfit 30 by two wires, current sensor 28 is connected with current digital gauge outfit 31 by two wires, direct current+24V joint and 0V joint are all connected the input end of tertiary circuit module 32, tertiary circuit module 32 is connected with current digital gauge outfit 31 with voltage digital gauge outfit 30 respectively, for voltage digital gauge outfit 30 and current digital gauge outfit 31 provide power supply, voltage digital gauge outfit 30 comprises voltage display screen 5, current digital gauge outfit 31 comprises electric current display screen 4, voltage swing while reading high pressure in can the voltage display screen 5 from switch board, size of current when the electric current display screen 4 of switch board is read high pressure.
In conjunction with Fig. 4, interchange in described switch board l turns DC circuit and comprises emergency warning lamp 18, transformer, rectifier bridge, discharge resistance R1 and filter capacitor C1, wherein alternating current 220V power supply connects total power switch K3, total power switch K3 is connected with emergency warning lamp 34 and the relay K 13 being connected in series, transformer and emergency warning lamp 34 and relay K 13 are connected in parallel, the output terminal of transformer is connected with the input end of rectifier bridge, the output terminal of rectifier bridge is connected with the discharge resistance R1 being connected in parallel, filter capacitor C1, voltage sensor 27 and current sensor 28, discharge resistance R1 also connects with relay K 12, current sensor 28 is also connected in series with high positive pressure jack 23 and the negative jack 24 of high pressure, voltage sensor 27 and current sensor 28 in Fig. 4 are in test mode, voltage and current size during testing high voltage.
Utilize interchange to turn DC circuit and can access high-voltage power supply, the condition of work of charging set when simulation subway is correctly runed, high-voltage power supply is that alternating current 220V is boosted to and exchanged 1000V by transformer, after rectifier bridge rectifying and wave-filtering, obtain again direct current 1500V, wherein rectifying part adopts 2 IGBT to form bridge rectifier, and filtering part adopts the electric capacity of a plurality of 3300V, 4uF to form filtering circuit.
In conjunction with Fig. 5, the concrete structure of the control relay circuit in switch board 1 is as follows: direct current 110V power supply connects total power switch K3, total power switch K3 connects the first branch road, the second branch road, the 3rd branch road, the 4th branch road and the 5th branch road being connected in parallel, wherein K3 is total power switch 13, SW02 is for controlling power switch 15, and SW01 is high-pressure and low-pressure test selection switch 14, and S02 is high pressing button 16, S01 is that high pressure divides button 17, and S11 is for tightly stopping button 6:
Described the first branch road connects the normally opened contact of detection signal jack 10 and relay K 20, described the second branch road comprises control power switch SW02 and the high-pressure and low-pressure test selection interrupteur SW 01 being connected in series, described high-pressure and low-pressure test selection interrupteur SW 01 one end is Hi-pot test circuit, the other end is low voltage experiment circuit, described Hi-pot test circuit comprises the high pressing button S02 being connected in series, high pressure divides button S01, the normally opened contact of relay K 13, the normally closed contact of relay K 12, the coil of relay K 10 and with high pressing button S02, high pressure divides button S01, the normally opened contact of relay K 13, the normally closed contact of relay K 12, the normally opened contact of relay K 10 and the coil of timing relay K11 that the coils from parallel connection of coils of relay K 10 connects, the coil of relay K 10 is also connected in parallel with the second pilot lamp 33, high pressing button S02 and high pressure divide contact and the contact between the normally opened contact of relay K 10 and the coil of timing relay K11 between button S01 to pass through wire short circuit, described low voltage experiment circuit comprises the coil of relay K 20, described the 3rd branch road comprises normally closed contact and first pilot lamp 35 of the relay K 10 of mutual series connection, described the 4th branch road comprises the time delay break contact of the timing relay K11 of mutual series connection, high pressing button S02, the normally closed contact of relay K 10 and the coil of relay K 12 and the normally opened contact that tightly stops button S11 being connected with the time delay break contact of timing relay K11, high pressing button S02, the normally closed contact of relay K 10 and the coils from parallel connection of coils of relay K 12, described the 5th branch road comprises the coil of normally opened contact, cabinet door switch SW03 and the relay K 13 of the normally closed contact that tightly stops button S11 that is connected in series, timing relay K11.
When switch board internal circuit is started working, closed total power switch K3, Closed control power switch SW02, now switch board can be exported direct current 110V and control power supply, then closed high low voltage experiment selector switch SW01, when selecting low voltage experiment, the coil electricity of relay K 20, the normally opened contact of relay K 20 is closed, now switch board can be exported direct current 110V detection signal, direct current 1.2V net in low voltage experiment presses signal to turn DC circuit conversion by interchange, switch board has been exported control power supply, net is pressed signal and detection signal, meet the condition of low voltage experiment, can carry out low voltage experiment to charging set, when selecting Hi-pot test, then press high pressing button S02, high pressing button S02 normally opened contact is closed, the coil electricity of timing relay K11, the time delay break contact of timing relay K11 is closed, the normally opened contact of relay K 10 is closed, the normally opened contact of controlled discharge branch road cut-in relay K12 in Fig. 4, circuit starts to carry out high pressure conversion, alternating current 220V is boosted to and is exchanged 1000V by transformer, after bridge rectifier filtering, obtain again direct current 1500V, meet the condition of Hi-pot test, can carry out Hi-pot test to charging set, when Hi-pot test stops, the normally opened contact of K12 relay is closed, controlled discharge branch road automatic discharging in Fig. 4.
Two kinds of power supply signals of main circuit input of switch board 1, be respectively alternating current 220V and direct current 110V, mutual relationship between the main circuit of switch board 1 is: voltage and current detection circuit and power-switching circuit provide work required power supply for voltage sensor 27 and current sensor 28, make it normally work and to show, normally opened contact access voltage and current detection circuit and the power-switching circuit of relay K 20, the normally opened contact of relay K 20 can be controlled net simultaneously and press signal output and detection signal output, total power switch K3 incoming transport turns DC circuit, total power switch K3 can control alternating current 220V power supply and direct current 110V power supply simultaneously, be equivalent to control the power supply input of whole switch board main circuit, the normally opened contact of the branch road cut-in relay K13 of emergency warning lamp 18 in the interchange of Fig. 4 turns DC circuit, when Fig. 5 repeat circuit control circuit is during in Hi-pot test, the normally opened contact of relay K 13 is closed, in Fig. 4, exchanging the emergency warning lamp 34 turning in DC circuit lights, the normally opened contact of the input end cut-in relay K10 of transformer, the normally opened contact of K10 relay is closed, circuit starts high pressure conversion, the normally opened contact of controlled discharge branch road cut-in relay K12 in Fig. 4, when Fig. 5 circuit mesohigh end of test, the normally opened contact of relay K 12 is connected, controlled discharge branch road automatic discharging.
Test board is provided with circuit protection device, comprises overload protection, emergency warning lamp prompting, automatic discharge circuit and safety protective circuit.Pass through Control; during Hi-pot test; emergency warning lamp is lighted always, and discharge loop is in standby condition, so long as high pressure disjunction or safety return circuit disconnect; high-voltage power supply will be passed through conductive discharge; safety protective circuit has also comprised that switch board cabinet door shuts holding circuit, during high-voltage operation, as long as open switch board cabinet door; high-tension circuit will cut off automatically, thus protection personnel's safety.
Finally it should be noted that: these are only preferred embodiment of the present utility model; be not limited to the utility model; although the utility model is had been described in detail with reference to embodiment; for a person skilled in the art; its technical scheme that still can record aforementioned each embodiment is modified; or part technical characterictic is wherein equal to replacement; but all within spirit of the present utility model and principle; any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a railcar battery charger test board, it is characterized in that: comprise switch board, charging set and test board, described switch board inside is provided with for detection of the output current of charging set and the voltage and current detection circuit of output voltage, transforming circuit, for being converted to galvanic interchange, alternating current turns DC circuit, control and exchange the control relay circuit that turns DC circuit, described switch board is electrically connected to charging set by test board, described voltage and current detection circuit comprises the voltage sensor for test voltage size, current sensor for measuring current size, voltage digital gauge outfit and current digital gauge outfit, described voltage sensor is connected with voltage digital gauge outfit, described current sensor is connected with current digital gauge outfit.
2. railcar battery charger test board according to claim 1, it is characterized in that: described voltage and current detection circuit comprises the first circuit module, described the first circuit module output dc voltage scope is 1.2V-23V, connect respectively 1.2V-23V joint, two 0V joints, 1.2V joint, described 1.2V-23V joint is connected regulated power supply jack with 0V joint, and described 0V joint and 1.2V joint connection network are pressed signal jack.
3. railcar battery charger test board according to claim 2, is characterized in that: described 1.2V-23V joint is by built-in potential device regulation output voltage.
4. railcar battery charger test board according to claim 1, it is characterized in that: described interchange turns DC circuit and comprises transformer, rectifier bridge, discharge resistance and filter capacitor, the output terminal of described transformer is connected with the input end of rectifier bridge, and the output terminal of described rectifier bridge is connected with filter capacitor and the discharge resistance being connected in parallel.
5. railcar battery charger test board according to claim 4, it is characterized in that: the output terminal of described rectifier bridge is also connected with voltage sensor and the current sensor being connected in parallel, and described voltage sensor, current sensor, filter capacitor and discharge resistance are connected in parallel.
6. railcar battery charger test board according to claim 1, it is characterized in that: described control relay circuit comprises the first branch road, the second branch road, the 3rd branch road, the 4th branch road and the 5th branch road being connected in parallel, described the first branch road connects detection signal jack; Described the second branch road connects high-pressure and low-pressure test selection switch, and described high-pressure and low-pressure test selection switch one end is Hi-pot test circuit, and the other end is low voltage experiment circuit; Described the 3rd branch road comprises the tenth relay and first pilot lamp of mutual series connection; Described the 4th branch road comprises successively the 11 timing relay, high pressing button, the tenth relay and the 12 relay and in parallel with the 11 timing relay, high pressing button, the tenth relay button that tightly stops of series connection; What described the 5th branch road comprised successively series connection tightly stops button, the 11 timing relay, cabinet door switch and the 13 relay.
7. railcar battery charger test board according to claim 6, is characterized in that: described Hi-pot test circuit comprises the tenth relay and the 11 timing relay that the high pressing button, the high pressure that are connected in series divide button, the 13 relay, the 12 relay, the tenth relay and divide button, the 13 relay, the 12 relay, the tenth relay to be connected in parallel with high pressing button, high pressure.
8. railcar battery charger test board according to claim 7, is characterized in that: described Hi-pot test circuit also comprises the second pilot lamp, and described the second pilot lamp and described the tenth relay are connected in parallel.
9. railcar battery charger test board according to claim 7, is characterized in that: described high pressing button and high pressure divide contact and the contact between the tenth relay and the 11 timing relay between button to pass through wire short circuit.
10. railcar battery charger test board according to claim 6, is characterized in that: described low voltage experiment circuit comprises the 20 relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420200901.0U CN203838264U (en) | 2014-04-23 | 2014-04-23 | Subway vehicle battery charger test bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420200901.0U CN203838264U (en) | 2014-04-23 | 2014-04-23 | Subway vehicle battery charger test bench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203838264U true CN203838264U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420200901.0U Expired - Lifetime CN203838264U (en) | 2014-04-23 | 2014-04-23 | Subway vehicle battery charger test bench |
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| Country | Link |
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| CN (1) | CN203838264U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680622A (en) * | 2016-12-08 | 2017-05-17 | 国网北京市电力公司 | Charging pile detection method and device, and charging pile detection circuit |
| CN107462823A (en) * | 2017-07-19 | 2017-12-12 | 安徽中能电源有限公司 | Battery of electric vehicle is internalized into charger communication maintenance and check system |
| CN107505930A (en) * | 2017-06-07 | 2017-12-22 | 南京铁道职业技术学院 | The test device and method of subway |
| CN110426585A (en) * | 2019-08-15 | 2019-11-08 | 东莞市赐而得自动化科技有限公司 | Electronic product reliability test macro |
| CN110853446A (en) * | 2019-11-21 | 2020-02-28 | 中国铁路工会太原电务段委员会 | High-speed rail motor car electricity affair ATP train control on-board equipment simulation system |
-
2014
- 2014-04-23 CN CN201420200901.0U patent/CN203838264U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680622A (en) * | 2016-12-08 | 2017-05-17 | 国网北京市电力公司 | Charging pile detection method and device, and charging pile detection circuit |
| CN106680622B (en) * | 2016-12-08 | 2019-06-07 | 国网北京市电力公司 | Charging pile detection method and device, charging pile detection circuit |
| CN107505930A (en) * | 2017-06-07 | 2017-12-22 | 南京铁道职业技术学院 | The test device and method of subway |
| CN107462823A (en) * | 2017-07-19 | 2017-12-12 | 安徽中能电源有限公司 | Battery of electric vehicle is internalized into charger communication maintenance and check system |
| CN110426585A (en) * | 2019-08-15 | 2019-11-08 | 东莞市赐而得自动化科技有限公司 | Electronic product reliability test macro |
| CN110853446A (en) * | 2019-11-21 | 2020-02-28 | 中国铁路工会太原电务段委员会 | High-speed rail motor car electricity affair ATP train control on-board equipment simulation system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20140917 |
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