Charger electrical performance testing circuit and testing device

Abstract

The utility model discloses a charger electrical performance test circuit and a test device. The test circuit comprises a first power supply, a second power supply, a first switch, a second switch and a charging indicating lamp. When the first switch is turned off and the second switch is turned on, the first power supply passes through the first switch and the second switch and then is connected with the external terminal, the first power supply simulates the under-voltage state of the to-be-charged power supply, the to-be-tested charger charges the under-voltage power supply, and the charging indicator lamp should display a charging lamp at the moment; when the first switch and the second switch are turned on and the first power supply and the second power supply are connected in parallel, the state of the to-be-charged power supply when the power supply is fully charged is simulated, and when the to-be-tested charger charges the fully-charged power supply, the charging indicating lamp should display that the power supply is fully charged at the moment; according to the technical scheme, whether the charger can perform normal charging or not and whether the charger can be automatically cut off or not after being fully charged can be detected.

Description

Technical Field

[0001] The utility model relates to the technical field of charger detection, and more specifically, to an electric performance inspection circuit and an inspection device for a charger. Background Art

[0002] The detection of electric vehicle chargers is a key step to ensure normal charging of electric vehicles and extend the battery life. After the chargers are produced, each charger needs to be detected, including charging detection and detection of power-off after being fully charged. Therefore, a charger performance detection device that can detect whether a charger can charge normally and automatically cut off after being fully charged is needed. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an electric performance inspection circuit and an inspection device for a charger that can detect whether a charger can charge normally and whether it can automatically cut off after being fully charged.

[0004] To achieve the above purpose, the technical scheme adopted by the utility model is as follows: an electric performance inspection circuit for a charger, characterized in that it includes a first power supply, a second power supply, a first switch, a second switch and a charging indicator light; the positive pole of the first power supply is connected to the positive pole of the first input end of the first switch, the negative pole of the first power supply is connected to the negative pole of the first input end and the negative pole of the second input end of the first switch, the positive pole of the second power supply is connected to the positive pole of the second input end of the first switch, the negative pole of the second power supply is connected to the positive pole of the first input end of the first switch, the first output end of the first switch is connected to the first input end of the second switch, the second output end of the first switch is connected to the second output end of the second switch, the first output end and the second output end of the second switch are respectively connected to the positive and negative poles of an external terminal, and the first output end of the second switch is also connected to the first output end of the second switch through the charging indicator light.

[0005] Optionally, it further includes a third switch, the first input end and the second input end of the third switch can be connected to an external power supply, the first output end of the third switch is respectively connected to the first input end of the first power supply and the first input end of the second power supply, and the second output end of the third switch is respectively connected to the second input end of the first power supply and the second input end of the second power supply.

[0006] Optionally, the first output end and the second output end of the third switch are also connected to the positive and negative poles of a charging socket.

[0007] Optionally, the voltage of the first power supply is less than the charging saturation voltage, and the sum of the voltage of the first power supply and the voltage of the second power supply is slightly greater than the charging saturation voltage.

[0008] Optionally, the voltage of the first power supply is 56V, and the voltage of the second power supply is 12V.

[0009] Optionally, the first output terminal of the second switch is also connected to the second output terminal of the second switch through a resistor.

[0010] The present disclosure also provides a charger electrical performance inspection device, including the above-mentioned charger electrical performance inspection circuit, and further including a box body and a cover plate. The cover plate is hinged to one side of the opening surface of the box body. The first switch, the second switch, and the charging indicator light are installed on the box body, and the first power supply and the second power supply are installed inside the box body.

[0011] Optionally, a charging socket and a third switch are further installed on the cover plate. A power input interface is installed on the side of the box body. The power input interface is respectively connected to the first power supply and the second power supply after passing through the third switch, and the power input interface is also connected to the charging socket after passing through the third switch.

[0012] Optionally, the cover plate has an upper area and a lower area. The charging socket and the charging indicator light are respectively installed on the left and right sides of the upper area of the cover plate, and the first switch, the second switch, and the third switch are installed in the lower area of the cover plate.

[0013] Compared with the prior art, the advantages of the present utility model are as follows:

[0014] In the present disclosure, a first power supply, a second power supply, a first switch, a second switch, and a charging indicator light are provided. When the first switch is closed and the second switch is open, the first power supply is connected to the external terminal through the first switch and the second switch. The first power supply simulates the state when the power supply to be charged is under voltage, and the charger to be tested charges the under-voltage power supply. At this time, the charging indicator light should display the charging light. When the first switch is open and the second switch is open, when the first power supply and the second power supply are in parallel, it simulates the state when the power supply to be charged is fully charged. When the charger to be tested charges the fully charged power supply, the charging indicator light should display the full charge light at this time. Through the technical solution of the present disclosure, it can be detected whether the charger can charge normally and whether it can automatically cut off after being fully charged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic structural diagram of the charger electrical performance inspection circuit in the present disclosure;

[0017] Figure 2 is a schematic structural diagram of a charger electrical performance inspection device in the present disclosure;

[0018] Figure 3 is a schematic structural diagram when the cover plate is opened in the present disclosure. Detailed Embodiment

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0020] Refer to Figure 1 As shown, the present invention provides a charger electrical performance inspection circuit, including a first power supply DC1, a second power supply DC2, a first switch K1, a second switch K2, and a charging indicator HL; the positive pole of the first power supply DC1 is connected to the positive pole of the first input end of the first switch K1, the negative pole of the first power supply DC1 is connected to the negative pole of the first input end and the negative pole of the second input end of the first switch K1, the positive pole of the second power supply DC2 is connected to the positive pole of the second input end of the first switch K1, the negative pole of the second power supply DC2 is connected to the positive pole of the first input end of the first switch K1, the first output end of the first switch K1 is connected to the first input end of the second switch K2, the second output end of the first switch K1 is connected to the second output end of the second switch K2, the first output end and the second output end of the second switch K2 are respectively connected to the positive and negative poles of an external terminal, and the first output end of the second switch K2 is also connected to the first output end of the second switch K2 through the charging indicator HL.

[0021] The voltage of the first power supply DC1 is less than the charging saturation voltage, and the sum of the voltage of the first power supply DC1 and the voltage of the second power supply C2 is slightly greater than the charging saturation voltage; for example, when detecting a charger for charging a 57.4V voltage, the voltage of the first power supply DC1 can be set to 56V, and the voltage of the second power supply can be set to 12V; when detecting whether the charger to be tested can charge, the 57.4V voltage output by the charger to be tested charges the 56V voltage of the first power supply DC1, and the green light of the charging indicator lights up; when simulating that the power supply is full, the first power supply DC1 and the second power supply DC2 jointly provide a voltage of 58V, and at this time, the charger to be tested cannot charge the first power supply DC1 and the second power supply DC2, and the red light of the charging indicator HL lights up.

[0022] During the test of the present disclosure, the charging port of the charger is connected to the external terminal, and the socket of the charger is connected to the external power supply. Then, the first switch K1 is closed and the second switch K2 is opened. The first power supply DC1 is connected to the external terminal after passing through the first switch K1 and the second switch K2. The first power supply simulates the state when the power supply to be charged is under-voltage. The charger to be tested charges the under-voltage power supply, and the charging indicator HL should display the charging light at this time;

[0023] When the first switch K1 is opened and the second switch K2 is opened again, when the first power supply DC1 and the second power supply DC2 are in parallel, it simulates the state when the power supply to be charged is fully charged. When the charger to be tested charges the fully charged power supply, the charging indicator HL should display the full charge light at this time; Through the technical solution of the present disclosure, it is possible to detect whether the charger can charge normally and whether it can automatically cut off after being fully charged.

[0024] In another embodiment, a third switch K3 is further included. The first input terminal and the second input terminal of the third switch K3 can be connected to an external power supply, and the external power supply can be an AC voltage of 220V. The first output terminal of the third switch K3 is respectively connected to the first input terminal of the first power supply DC1 and the first input terminal of the second power supply DC2, and the second output terminal of the third switch K3 is respectively connected to the second input terminal of the first power supply DC1 and the second input terminal of the second power supply DC2. In order to prevent both the first power supply DC1 and the second power supply DC2 from being out of power and not reaching the required voltage, it is necessary for the external power supply to charge the first power supply DC1 and the second power supply DC2; the third switch K3 controls whether to charge.

[0025] In one embodiment, the first output terminal and the second output terminal of the third switch K3 are also connected to the positive and negative electrodes of the charging socket C1. When testing the charger to be tested, the plug of the charger to be tested can be inserted into the charging socket C1, which is convenient for supplying power to the charger to be tested.

[0026] Optionally, the first output terminal of the second switch K2 is also connected to the second output terminal of the second switch K2 through a resistor R1 for simulating a load.

[0027] Refer to Figure 2 、 Figure 3As shown in the figure, the present disclosure also provides a charger electrical performance inspection device, which includes the above-mentioned charger electrical performance inspection circuit, and further includes a box body 1 and a cover plate 2. The cover plate 2 is hinged to one side of the opening surface of the box body 1. The first switch K1, the second switch K2 and the charging indicator light HL are installed on the box body 1, and the first power supply DC1 and the second power supply DC2 are installed inside the box body 1. The first switch K1 and the second switch K2 are installed on the cover plate 2 for convenient direct control and operation from the outside, and the charging indicator light HL is installed on the cover plate 2 for convenient direct viewing of the indicator light display result. The first power supply DC1 and the second power supply DC2 are installed inside the box body 1 for convenient protection of the power supply.

[0028] A charging socket C1 and a third switch K3 are also installed on the cover plate 2. A power input interface is installed on the side of the box body 1. The power input interface on the side is convenient for wiring with an external power supply. After passing through the third switch K3, the power input interface is respectively connected to the first power supply DC1 and the second power supply DC2, and the power input interface is also connected to the charging socket C1 after passing through the third switch K3. The cover plate 2 has an upper area and a lower area. The charging socket C1 and the charging indicator light HL are respectively installed on the left and right sides of the upper area of the cover plate 2, and the first switch K1, the second switch K2 and the third switch K3 are installed in the lower area of the cover plate 2.

[0029] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, the patent owner can make various deformations or modifications within the scope of the appended claims. As long as it does not exceed the protection scope described by the claims of the present invention, it should be within the protection scope of the present invention.

Claims

1. A charger electrical performance inspection circuit, characterized in that: It includes a first power supply, a second power supply, a first switch, a second switch and a charging indicator light; the positive pole of the first power supply is connected to the positive pole of the first input end of the first switch, the negative pole of the first power supply is connected to both the negative pole of the first input end and the negative pole of the second input end of the first switch, the positive pole of the second power supply is connected to the positive pole of the second input end of the first switch, the negative pole of the second power supply is connected to the positive pole of the first input end of the first switch, the first output end of the first switch is connected to the first input end of the second switch, the second output end of the first switch is connected to the second output end of the second switch, the first output end and the second output end of the second switch are respectively connected to the positive and negative poles of an external terminal, and the first output end of the second switch is also connected to the first output end of the second switch through the charging indicator light.

2. The electrical performance inspection circuit of a charger according to claim 1, wherein: It further includes a third switch, the first input end and the second input end of the third switch can be connected to an external power supply, the first output end of the third switch is respectively connected to the first input end of the first power supply and the first input end of the second power supply, and the second output end of the third switch is respectively connected to the second input end of the first power supply and the second input end of the second power supply.

3. The electrical performance inspection circuit of a charger according to claim 2, wherein: The first output end and the second output end of the third switch are also connected to the positive and negative poles of a charging socket.

4. The electrical performance inspection circuit of a charger according to claim 1, wherein: The voltage of the first power supply is less than the charging saturation voltage, and the sum of the voltage of the first power supply and the voltage of the second power supply is slightly greater than the charging saturation voltage.

5. The electrical performance inspection circuit of a charger according to claim 4, wherein: The voltage of the first power supply is 56V, and the voltage of the second power supply is 12V.

6. The electrical performance inspection circuit of a charger according to claim 2, characterized in that: The first output end of the second switch is also connected to the second output end of the second switch through a resistor.

7. A charger electrical performance inspection device, characterized in that: It includes the charger electrical performance inspection circuit described in claim 1, and further includes a box body and a cover plate. The cover plate is hinged to one side of the opening surface of the box body. The first switch, the second switch and the charging indicator light are installed on the box body, and the first power supply and the second power supply are installed inside the box body.

8. An electrical performance inspection device for a charger according to claim 7, characterized in that: The charging socket and the third switch are also installed on the cover plate. A power input interface is installed on the side of the box body. The power input interface is respectively connected to the first power supply and the second power supply after passing through the third switch, and the power input interface is also connected to the charging socket after passing through the third switch.

9. The electrical performance inspection circuit of a charger according to claim 8, characterized in that: The cover plate has an upper area and a lower area. The charging socket and the charging indicator light are respectively installed on the left and right sides of the upper area of the cover plate, and the first switch, the second switch and the third switch are installed in the lower area of the cover plate.

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