CN206515409U - A kind of AC charging box test device - Google Patents
A kind of AC charging box test device Download PDFInfo
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- CN206515409U CN206515409U CN201720017082.XU CN201720017082U CN206515409U CN 206515409 U CN206515409 U CN 206515409U CN 201720017082 U CN201720017082 U CN 201720017082U CN 206515409 U CN206515409 U CN 206515409U
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- 238000005516 engineering process Methods 0.000 abstract description 2
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Abstract
The utility model embodiment provides a kind of AC charging box test device, is related to electronic technology field.The device includes voltage conversion unit, the first electricity accumulating unit, the second electricity accumulating unit, first switch unit, second switch unit and inverter unit；Wherein, the input of voltage conversion unit is connected with the output end of AC charging box, output end is connected with the input of first switch unit, the first output end and the second output end of first switch unit are connected to the first input end and the second input of second switch unit by the first electricity accumulating unit and the second electricity accumulating unit respectively, and the output end of second switch unit is connected to the input of AC charging box by inverter unit.The utility model embodiment to AC charging box by the way of energy feedback due to carrying out burn-in test, so as to save energy resource consumption during burn-in test is carried out to AC charging box, the utilization rate of the energy is improved, test and the production cost of product is greatly reduced.
Description
Technical Field
The utility model belongs to the technical field of the electron, especially, relate to an alternating current charging box testing arrangement.
Background
With the popularization of domestic electric vehicles, a large number of manufacturers of electric vehicle charging equipment are brought forward. In order to ensure the reliability of the electric vehicle charging equipment in the subsequent use process, the aging function test of the electric vehicle charging equipment must be performed before the electric vehicle charging equipment is shipped, so that almost every manufacturer of the electric vehicle charging equipment faces the aging function test problem of the electric vehicle charging equipment in the production process.
However, at present, most manufacturers of electric vehicle charging equipment adopt an aging function testing technology for the electric vehicle charging equipment, which generally directly adopts a resistor or a battery as a load to perform an aging function test on the electric vehicle charging equipment, and the testing principle is shown in fig. 1 and fig. 2.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide an exchange box testing arrangement that charges aims at solving the energy utilization of above-mentioned current electric automobile battery charging outfit's ageing functional test technique low to the higher problem of cost.
The embodiment of the utility model provides a realize like this, an alternating current charging box testing arrangement, including voltage conversion unit, first electric power storage unit, second electric power storage unit, first switch unit, second switch unit and inverter unit;
the input end of the voltage conversion unit is connected with the output end of the alternating current charging box, the output end of the voltage conversion unit is connected with the input end of the first switch unit, the first output end and the second output end of the first switch unit are respectively connected to the first input end and the second input end of the second switch unit through the first power storage unit and the second power storage unit, and the output end of the second switch unit is connected to the input end of the alternating current charging box through the inverter power supply unit;
when the voltage conversion unit is connected with the first power storage unit through the first switch unit, the voltage conversion unit is disconnected with the second power storage unit; the inverter power supply unit is connected with the second power storage unit through the second switch unit, when the inverter power supply unit is disconnected from the first power storage unit, the voltage conversion unit converts the alternating current output by the alternating current charging box into direct current to charge the first power storage unit, and the inverter power supply unit converts the direct current output by the second power storage unit into alternating current to provide working voltage for the alternating current charging box; or,
when the voltage conversion unit is connected with the second power storage unit through the first switch unit, the voltage conversion unit is disconnected with the first power storage unit; the inverter power supply unit is connected with the first power storage unit through the second switch unit, when the inverter power supply unit is disconnected from the second power storage unit, the voltage conversion unit converts alternating current output by the alternating current charging box into direct current to charge the second power storage unit, and the inverter power supply unit converts direct current output by the first power storage unit into alternating current to provide working voltage for the alternating current charging box.
On the basis of the technical scheme, the charging system further comprises a monitoring unit, wherein a data acquisition end of the monitoring unit is respectively connected with data output ends of the alternating current charging box, the first electric storage unit and the second electric storage unit;
the monitoring unit is used for monitoring the electric quantity information of the alternating current charging box, the first electric storage unit and the second electric storage unit in real time.
On the basis of the technical scheme, the charging device further comprises a third switching unit and a mains supply unit, wherein the output end of the third switching unit is connected with the input end of the alternating-current charging box, and the first input end and the second input end of the third switching unit are respectively connected with the output end of the inverter power supply unit and the output end of the mains supply;
if the circulating electric quantity of the alternating current charging box, the first electric storage unit and the second electric storage unit is consumed, the third switch unit controls the alternating current charging box to be connected with the mains supply unit and disconnected with the inverter power supply unit, so that the mains supply unit provides working voltage for the alternating current charging box.
On the basis of the technical scheme, if the total electric quantity of the alternating-current charging box, the first electric storage unit and the second electric storage unit reaches a preset electric quantity threshold value, the third switch unit controls the alternating-current charging box to be disconnected from the commercial power supply unit and to be connected with the inverter power supply unit, so that the inverter power supply unit provides working voltage for the alternating-current charging box.
On the basis of the above technical solution, the first switch unit includes a first single-pole double-throw switch, a moving end of the first single-pole double-throw switch is an input end of the first switch unit, and two stationary ends of the first single-pole double-throw switch are respectively a first output end and a second output end of the first switch unit.
On the basis of the above technical solution, the first switch unit includes two first switches and two second switches that are electrically interlocked, wherein the input terminals of the first switches and the second switches are connected together to form the input terminal of the first switch unit, and the output terminals of the first switches and the second switches are the first output terminal and the second output terminal of the first switch unit, respectively.
On the basis of the above technical solution, the second switch unit includes a second single-pole double-throw switch, a moving end of the second single-pole double-throw switch is an output end of the second switch unit, and two fixed ends of the second single-pole double-throw switch are respectively a first input end and a second input end of the second switch unit.
On the basis of the above technical solution, the second switch unit includes a third switch and a fourth switch that are electrically interlocked, wherein output terminals of the third switch and the fourth switch are connected together to form an output terminal of the second switch unit, and input terminals of the third switch and the fourth switch are a first input terminal and a second input terminal of the second switch unit, respectively.
On the basis of the above technical solution, the third switching unit includes a third single-pole double-throw switch, a moving end of the third single-pole double-throw switch is an output end of the third switching unit, and two fixed ends of the third single-pole double-throw switch are respectively a first input end and a second input end of the third switching unit.
On the basis of the above technical solution, the third switching unit includes a fifth switch and a sixth switch that are electrically interlocked with each other, wherein output terminals of the fifth switch and the sixth switch are connected in common to form an output terminal of the third switching unit, and input terminals of the fifth switch and the sixth switch are a first input terminal and a second input terminal of the third switching unit, respectively.
The embodiment of the utility model provides a pair of alternating current charging box testing arrangement carries out aging testing to alternating current charging box owing to the mode that adopts the energy repayment to can carry out aging testing's in-process energy saving consumption to alternating current charging box, improve the utilization ratio of the energy, greatly reduced the test and the manufacturing cost of product.
Drawings
FIG. 1 is a schematic diagram of a test technique for testing aging function of an electric vehicle charging apparatus used in the prior art;
FIG. 2 is a testing schematic diagram of an aging function testing technique of another electric vehicle charging device adopted in the prior art;
fig. 3 is a schematic block diagram of an ac charging box testing apparatus according to an embodiment of the present invention;
fig. 4 is a schematic block diagram of an ac charging testing apparatus according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 3 is a schematic block diagram of an ac charging box testing apparatus according to an embodiment of the present invention, and only the parts related to the embodiment are shown for convenience of description.
Referring to fig. 3, the ac charging box testing apparatus provided in this embodiment includes a voltage conversion unit 2, a first power storage unit 4, a second power storage unit 5, a first switch unit 3, a second switch unit 6, and an inverter power supply unit 7;
the input end of the voltage conversion unit 2 is connected with the output end of the ac charging box 1, the output end of the voltage conversion unit 2 is connected with the input end of the first switch unit 3, the first output end and the second output end of the first switch unit 3 are respectively connected to the first input end and the second input end of the second switch unit 6 through the first power storage unit and the second power storage unit 5, and the output end of the second switch unit 6 is connected to the input end of the ac charging box 1 through the inverter power supply unit 7;
when the voltage conversion unit 2 is turned on with the first power storage unit 4 through the first switching unit 3, it is turned off with the second power storage unit 5; the inverter power supply unit 7 is connected to the second power storage unit 5 through the second switch unit 6, and when the inverter power supply unit 7 is disconnected from the first power storage unit 4, the voltage conversion unit 2 converts the alternating current output by the alternating current charging box 1 into direct current to charge the first power storage unit 4, and the inverter power supply unit 7 converts the direct current output by the second power storage unit 5 into alternating current to provide working voltage for the alternating current charging box 1; or,
when the voltage conversion unit 2 is connected with the second power storage unit 5 through the first switch unit 3, the voltage conversion unit is disconnected with the first power storage unit 4; the inverter power supply unit 7 is connected to the first power storage unit 4 through the second switch unit 6, and when the inverter power supply unit is disconnected from the second power storage unit 5, the voltage conversion unit 2 converts the alternating current output by the alternating current charging box 1 into direct current to charge the second power storage unit 5, and the inverter power supply unit 7 converts the direct current output by the first power storage unit 4 into alternating current to provide working voltage for the alternating current charging box 1.
Further, in the present embodiment, the voltage converting unit 2 includes, but is not limited to, an AC-DC converting chip.
Further, in the present embodiment, the first power storage unit 4 and the second power storage unit 5 include, but are not limited to, a lithium battery, a secondary battery, and the like.
Further, in the present embodiment, the inverter power supply unit 7 includes, but is not limited to, a DC-AC conversion chip.
Further, in this embodiment, the testing apparatus for the ac charging box 1 further includes a third switching unit 8 and a commercial power supply unit 9, an output end of the third switching unit 8 is connected to an input end of the ac charging box 1, and a first input end and a second input end of the third switching unit 8 are respectively connected to an output end of the inverter power supply unit 7 and an output end of the commercial power supply;
if the circulating electric quantities of the ac charging box 1, the first electric storage unit 4, and the second electric storage unit 5 are all consumed, the third switch unit 8 controls the ac charging box 1 to be connected with the commercial power supply unit 9 and disconnected from the inverter power supply unit 7, so that the commercial power supply unit 9 provides working voltage for the ac charging box 1.
Further, in this embodiment, if the total electric quantity of the ac charging box 1, the first electric storage unit 4, and the second electric storage unit 5 reaches a preset electric quantity threshold, the third switching unit 8 controls the ac charging box 1 to be disconnected from the commercial power supply unit 9 and to be connected to the inverter power supply unit 7, so that the inverter power supply unit 7 provides a working voltage for the ac charging box 1.
In this embodiment, the preset electric quantity threshold is an electric quantity value corresponding to the first electric storage unit 4 or the second electric storage unit 5 when being fully charged, and is set by a tester according to the electric storage quantity of the first electric storage unit 4 or the second electric storage unit 5.
In this embodiment, the first switch unit 3 includes a first single-pole double-throw switch S1, a moving terminal of the first single-pole double-throw switch S1 is an input terminal of the first switch unit 3, and two fixed terminals of the first single-pole double-throw switch S1 are a first output terminal and a second output terminal of the first switch unit 3, respectively.
In this embodiment, the second switch unit 6 includes a second single-pole double-throw switch S2, a moving terminal of the second single-pole double-throw switch S2 is an output terminal of the second switch unit 6, and two fixed terminals of the second single-pole double-throw switch S2 are a first input terminal and a second input terminal of the second switch unit 6, respectively.
In this embodiment, the third switching unit 8 includes a third single-pole double-throw switch S3, a moving terminal of the third single-pole double-throw switch S3 is an output terminal of the third switching unit 8, and two fixed terminals of the third single-pole double-throw switch S3 are a first input terminal and a second input terminal of the third switching unit 8, respectively.
In this embodiment, the first single-pole double-throw switch S1 is used to control on/off of the first power storage unit 4, the second power storage unit 5 and the voltage conversion unit 2, the second single-pole double-throw switch S2 is used to control on/off of the first power storage unit 4, the second power storage unit 5 and the inverter power supply unit 7, and the third single-pole double-throw switch S3 is used to control on/off of the ac charging box 1 and the commercial power and the inverter power supply.
In the present embodiment, since the electric storage units cannot be charged and discharged simultaneously, if one of the first electric storage unit 4 and the second electric storage unit 5 is charged as a load, the other electric storage unit supplies power as a power supply to the ac charging box 1, and the first electric storage unit 4 and the second electric storage unit 5 may alternately function as a load and a power supply; the commercial power supply unit 9 is only used for energy supplement after energy loss, if one of the first electric storage unit 4 and the second electric storage unit 5 is fully charged, the electric quantity in the electric storage unit can be recycled in the whole system until the electric quantity is consumed through the system internal loss, and then the commercial power supply unit 9 is used for energy supplement.
Above can find out that the mode that this embodiment provided carries out aging testing to alternating current charging box owing to adopt the energy repayment to alternating current charging box testing arrangement to can be to alternating current charging box carry out aging testing's in-process energy saving consumption, improved the utilization ratio of the energy, greatly reduced the test and the manufacturing cost of product.
Fig. 4 is a schematic block diagram of an ac charging box testing apparatus according to another embodiment of the present invention. Only the portions related to the present embodiment are shown for convenience of explanation.
Referring to fig. 4, the ac charging box testing apparatus provided in this embodiment includes a voltage conversion unit 2, a first power storage unit 4, a second power storage unit 5, a first switching unit 3, a second switching unit 6, and an inverter power supply unit 7;
the input end of the voltage conversion unit 2 is connected with the output end of the ac charging box 1, the output end of the voltage conversion unit 2 is connected with the input end of the first switch unit 3, the first output end and the second output end of the first switch unit 3 are respectively connected to the first input end and the second input end of the second switch unit 6 through the first power storage unit and the second power storage unit 5, and the output end of the second switch unit 6 is connected to the input end of the ac charging box 1 through the inverter power supply unit 7;
when the voltage conversion unit 2 is turned on with the first power storage unit 4 through the first switching unit 3, it is turned off with the second power storage unit 5; the inverter power supply unit 7 is connected to the second power storage unit 5 through the second switch unit 6, and when the inverter power supply unit 7 is disconnected from the first power storage unit 4, the voltage conversion unit 2 converts the alternating current output by the alternating current charging box 1 into direct current to charge the first power storage unit 4, and the inverter power supply unit 7 converts the direct current output by the second power storage unit 5 into alternating current to provide working voltage for the alternating current charging box 1; or,
when the voltage conversion unit 2 is connected with the second power storage unit 5 through the first switch unit 3, the voltage conversion unit is disconnected with the first power storage unit 4; the inverter power supply unit 7 is connected to the first power storage unit 4 through the second switch unit 6, and when the inverter power supply unit is disconnected from the second power storage unit 5, the voltage conversion unit 2 converts the alternating current output by the alternating current charging box 1 into direct current to charge the second power storage unit 5, and the inverter power supply unit 7 converts the direct current output by the first power storage unit 4 into alternating current to provide working voltage for the alternating current charging box 1.
Further, in the present embodiment, the voltage converting unit 2 includes, but is not limited to, an AC-DC converting chip.
Further, in the present embodiment, the first power storage unit 4 and the second power storage unit 5 include, but are not limited to, a lithium battery, a secondary battery, and the like.
Further, in the present embodiment, the inverter power supply unit 7 includes, but is not limited to, a DC-AC conversion chip.
Further, in this embodiment, the testing apparatus for the ac charging box 1 further includes a monitoring unit, and a data acquisition end of the monitoring unit is connected to data output ends of the ac charging box 1, the first power storage unit 4, and the second power storage unit 5 respectively;
the monitoring unit is used for monitoring the electric quantity information of the alternating current charging box 1, the first electric storage unit 4 and the second electric storage unit 5 in real time.
In this embodiment, the charging process of the electric vehicle can be reproduced by the monitoring unit from time to time, so that a tester at the monitoring unit can obtain the electric quantity data in the alternating current charging box 1 and the electric storage unit in the charging process in real time, and the truth and accuracy of the test data are ensured.
Further, in this embodiment, the testing apparatus for the ac charging box 1 further includes a third switching unit 8 and a commercial power supply unit 9, an output end of the third switching unit 8 is connected to an input end of the ac charging box 1, and a first input end and a second input end of the third switching unit 8 are respectively connected to an output end of the inverter power supply unit 7 and an output end of the commercial power supply;
if the circulating electric quantities of the ac charging box 1, the first electric storage unit 4, and the second electric storage unit 5 are all consumed, the third switch unit 8 controls the ac charging box 1 to be connected with the commercial power supply unit 9 and disconnected from the inverter power supply unit 7, so that the commercial power supply unit 9 provides working voltage for the ac charging box 1.
Further, in this embodiment, if the total electric quantity of the ac charging box 1, the first electric storage unit 4, and the second electric storage unit 5 reaches a preset electric quantity threshold, the third switching unit 8 controls the ac charging box 1 to be disconnected from the commercial power supply unit 9 and to be connected to the inverter power supply unit 7, so that the inverter power supply unit 7 provides a working voltage for the ac charging box 1.
In this embodiment, the preset electric quantity threshold is an electric quantity value corresponding to the first electric storage unit 4 or the second electric storage unit 5 when being fully charged, and is set by a tester according to the electric storage quantity of the first electric storage unit 4 or the second electric storage unit 5.
In this embodiment, the first switch unit 3 includes two electrically interlocked first switches K1 and second switches, wherein the input terminals of the first switch K1 and the second switch K2 are connected in common to form the input terminal of the first switch unit 3, and the output terminals of the first switch K1 and the second switch K2 are the first output terminal and the second output terminal of the first switch unit 3, respectively.
In this embodiment, the second switch unit 6 includes two electrically interlocked third switches K3 and fourth switches K4, wherein the output terminals of the third switch K3 and the fourth switch K4 are connected in common to form the output terminal of the second switch unit 6, and the input terminals of the third switch K3 and the fourth switch K4 are the first input terminal and the second input terminal of the second switch unit 6, respectively.
In this embodiment, the third switching unit 8 includes two electrically interlocked fifth switches K5 and sixth switches K6, wherein the output terminals of the fifth switch K5 and the sixth switch K6 are connected together to form the output terminal of the third switching unit 8, and the input terminals of the fifth switch K5 and the sixth switch K6 are the first input terminal and the second input terminal of the third switching unit 8, respectively.
In this embodiment, the first switch K1 and the second switch K2 are respectively used for controlling on/off of the first power storage unit 4 and the second power storage unit 5 and the voltage conversion unit 2, the third switch K3 and the fourth switch K4 are respectively used for controlling on/off of the first power storage unit 4 and the second power storage unit 5 and the inverter power supply unit 7, and the fifth switch K5 and the sixth switch K6 are respectively used for controlling on/off of the ac charging box 1 and the commercial power and the inverter power supply, wherein the first switch K1 and the second switch K2 cannot be simultaneously closed, the first switch K1 and the third switch K3 cannot be simultaneously closed, the second switch K2 and the fourth switch K4 cannot be simultaneously closed, and the fifth switch K5 and the sixth switch K6 cannot be simultaneously closed, and these switches that cannot be simultaneously closed can all be realized by electrical interlock.
It should be noted that the above-mentioned switch units implemented by electrical interlocking are only a preferred implementation example of the present invention, and are not intended to limit the present invention, and may also be implemented by other types of switches in other embodiments.
In the present embodiment, since the electric storage units cannot be charged and discharged simultaneously, if one of the first electric storage unit 4 and the second electric storage unit 5 is charged as a load, the other electric storage unit supplies power as a power supply to the ac charging box 1, and the first electric storage unit 4 and the second electric storage unit 5 may alternately function as a load and a power supply; the commercial power supply unit 9 is only used for energy supplement after energy loss, if one of the first electric storage unit 4 and the second electric storage unit 5 is fully charged, the electric quantity in the electric storage unit can be recycled in the whole system until the electric quantity is consumed through the system internal loss, and then the commercial power supply unit 9 is used for energy supplement.
Therefore, it can be seen that the ac charging box testing device provided by the embodiment also adopts the energy feedback mode to perform the aging test on the ac charging box, so that the energy consumption can be saved in the aging test process of the ac charging box, the energy utilization rate is improved, and the testing and production cost of the product is greatly reduced.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An alternating current charging box testing device is characterized by comprising a voltage conversion unit, a first power storage unit, a second power storage unit, a first switch unit, a second switch unit and an inverter power supply unit;
the input end of the voltage conversion unit is connected with the output end of the alternating current charging box, the output end of the voltage conversion unit is connected with the input end of the first switch unit, the first output end and the second output end of the first switch unit are respectively connected to the first input end and the second input end of the second switch unit through the first power storage unit and the second power storage unit, and the output end of the second switch unit is connected to the input end of the alternating current charging box through the inverter power supply unit;
when the voltage conversion unit is connected with the first power storage unit through the first switch unit, the voltage conversion unit is disconnected with the second power storage unit; the inverter power supply unit is connected with the second power storage unit through the second switch unit, when the inverter power supply unit is disconnected from the first power storage unit, the voltage conversion unit converts the alternating current output by the alternating current charging box into direct current to charge the first power storage unit, and the inverter power supply unit converts the direct current output by the second power storage unit into alternating current to provide working voltage for the alternating current charging box; or,
when the voltage conversion unit is connected with the second power storage unit through the first switch unit, the voltage conversion unit is disconnected with the first power storage unit; the inverter power supply unit is connected with the first power storage unit through the second switch unit, when the inverter power supply unit is disconnected from the second power storage unit, the voltage conversion unit converts alternating current output by the alternating current charging box into direct current to charge the second power storage unit, and the inverter power supply unit converts direct current output by the first power storage unit into alternating current to provide working voltage for the alternating current charging box.
2. The ac charging box testing device according to claim 1, further comprising a monitoring unit, wherein a data acquisition end of the monitoring unit is connected to data output ends of the ac charging box, the first power storage unit and the second power storage unit, respectively;
the monitoring unit is used for monitoring the electric quantity information of the alternating current charging box, the first electric storage unit and the second electric storage unit in real time.
3. The ac charging box testing apparatus of claim 1, further comprising a third switching unit and a mains power supply unit, wherein an output terminal of the third switching unit is connected to an input terminal of the ac charging box, and a first input terminal and a second input terminal of the third switching unit are respectively connected to an output terminal of the inverter power supply unit and an output terminal of the mains power supply;
if the circulating electric quantity of the alternating current charging box, the first electric storage unit and the second electric storage unit is consumed, the third switch unit controls the alternating current charging box to be connected with the mains supply unit and disconnected with the inverter power supply unit, so that the mains supply unit provides working voltage for the alternating current charging box.
4. The ac charging box testing apparatus of claim 3, wherein if the total power of the ac charging box, the first power storage unit, and the second power storage unit reaches a preset power threshold, the third switching unit controls the ac charging box to be disconnected from the commercial power supply unit and to be connected to the inverter power supply unit, so that the inverter power supply unit provides a working voltage for the ac charging box.
5. The ac charging box testing apparatus of claim 1, wherein the first switch unit comprises a first single-pole double-throw switch, a moving terminal of the first single-pole double-throw switch is an input terminal of the first switch unit, and two stationary terminals of the first single-pole double-throw switch are a first output terminal and a second output terminal of the first switch unit, respectively.
6. The ac charging box testing apparatus of claim 1, wherein the first switch unit comprises two electrically interlocked first and second switches, wherein the input terminals of the first and second switches are connected in common to form the input terminal of the first switch unit, and the output terminals of the first and second switches are the first and second output terminals of the first switch unit, respectively.
7. The ac charging box testing apparatus of claim 1, wherein the second switch unit comprises a second single-pole double-throw switch, a moving end of the second single-pole double-throw switch is an output end of the second switch unit, and two stationary ends of the second single-pole double-throw switch are a first input end and a second input end of the second switch unit, respectively.
8. The ac charging box testing apparatus of claim 1, wherein the second switch unit comprises two electrically interlocked third switches and fourth switches, wherein the output terminals of the third switches and the fourth switches are connected together to form the output terminal of the second switch unit, and the input terminals of the third switches and the fourth switches are the first input terminal and the second input terminal of the second switch unit, respectively.
9. The ac charging box test apparatus of claim 3, wherein the third switch unit comprises a third single-pole double-throw switch, a moving terminal of the third single-pole double-throw switch is an output terminal of the third switch unit, and two stationary terminals of the third single-pole double-throw switch are a first input terminal and a second input terminal of the third switch unit, respectively.
10. The ac charging box testing apparatus of claim 3, wherein the third switch unit comprises two electrically interlocked fifth and sixth switches, wherein the output terminals of the fifth and sixth switches are connected together to form the output terminal of the third switch unit, and the input terminals of the fifth and sixth switches are the first and second input terminals of the third switch unit, respectively.
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| CN201720017082.XU CN206515409U (en) | 2017-01-06 | 2017-01-06 | A kind of AC charging box test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108279339A (en) * | 2017-01-06 | 2018-07-13 | 深圳市昭恒新能源技术有限公司 | A kind of AC charging box test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279339A (en) * | 2017-01-06 | 2018-07-13 | 深圳市昭恒新能源技术有限公司 | A kind of AC charging box test device |
| CN108279339B (en) * | 2017-01-06 | 2024-04-26 | 深圳市昭恒新能源技术有限公司 | Alternating-current charging box testing device |
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