Insulation detection test fixture

Abstract

An insulation detection test fixture comprises a carrier plate, and a fixed-value resistor assembly (10), a first terminal (20) and a second terminal (30) which are arranged on the carrier plate, a first end of the fixed-value resistor assembly (10) is electrically connected to the first terminal (20), a second end of the fixed-value resistor assembly (10) is electrically connected to the second terminal (30), and the fixed-value resistor assembly (10) is electrically connected to the first terminal (20). The first terminal (20) and the second terminal (30) are both used for being connected with a wiring end of a circuit to be diagnosed, and the circuit to be diagnosed is configured to be capable of measuring a resistance value. The resistance value of the fixed-value resistor can be detected through the insulation detection circuit, and the measured resistance value is compared with the actual resistance value of the fixed-value resistor, so that the accuracy of the detection result can be known, and the accuracy of the detection result of the insulation detection circuit is further ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit detection technical field especially relates to a kind of insulation detection test fixture. BACKGROUND

[0002] With the popularity of new energy vehicles, the consideration of safety performance of new energy vehicles is also more comprehensive and meticulous. For example, the voltage of general electric vehicle battery pack or charging pile can be as high as 400V or more. If the high voltage of the battery pack or the charging pile is connected to the body and the insulation fails, high-voltage electric shock danger will occur, threatening personnel safety. Therefore, insulation detection plays a crucial role in ensuring the safety performance of electric vehicles.

[0003] For example, the prior art usually insulates the high-voltage line of the vehicle, detects the equivalent resistance of the high-voltage positive bus and the body ground and the high-voltage negative bus and the body ground through the insulation detection circuit, obtains the insulation resistance, and then determines whether the insulation resistance meets the standard according to the national standard. However, if the detection circuit has a problem, the resistance detection of the measured object will also have an error. Therefore, an insulation detection test fixture is needed to solve the above problems.

[0004] Therefore, the present application discloses an insulation detection test fixture to overcome the above problems. SUMMARY

[0005] The utility model provides an insulation detection test fixture, which can test the insulation detection circuit and ensure the accuracy of the insulation detection circuit detection result.

[0006] The present application provides an insulation detection test fixture, which comprises a carrier plate, a fixed resistance component, a first terminal and a second terminal arranged on the carrier plate. The first end of the fixed resistance component is electrically connected to the first terminal, and the second end of the fixed resistance component is electrically connected to the second terminal. The first terminal and the second terminal are used to connect the wiring terminal of the circuit to be diagnosed, and the circuit to be diagnosed is configured to measure the resistance value.

[0007] Optionally, the fixed resistance component comprises a plurality of resistors, and the plurality of resistors are connected in series and / or parallel.

[0008] Optionally, the carrier plate comprises a first carrier plate arranged in a first direction and a plurality of second carrier plates distributed in a second direction. The first carrier plate is located on one side of the second carrier plates in the second direction, and the first direction is perpendicular to the second direction. The first terminal and the second terminal are arranged on the first carrier plate. The resistors are distributed on the second carrier plates according to the resistance range, and the resistors with the same resistance range are arranged on the same second carrier plate.

[0009] Optionally, the insulation detection test fixture further comprises a support rod, and the first carrier plate and the second carrier plate are connected by the support rod.

[0010] Optionally, a plurality of first terminals and one second terminal are provided, the resistance is connected to the circuit to be diagnosed through the first terminals and the second terminal, a switch is arranged between each of the first terminals and the first end of the resistance, and the switch is used for connecting and disconnecting the electrical connection between the corresponding first terminal and the resistance.

[0011] Optionally, a wiring terminal is arranged on the second carrier plate and located at each end of the resistance, and the two ends of the resistance are connected to the corresponding wiring terminals; a wire is further arranged on the second carrier plate, one end of the wire is used for connecting one of the wiring terminals corresponding to one of the resistances, and the other end of the wire is used for connecting one of the wiring terminals corresponding to the other resistance or connecting a first wiring terminal or a second wiring terminal.

[0012] Optionally, the wire and the wiring terminal are detachably connected.

[0013] Optionally, the wire is divided into a fixed wire and a variable wire, a fixing member is arranged on the second carrier plate, and the fixed wire and the variable wire are both used for being connected to the wiring terminal; the fixing member is used for fixing the arrangement of the fixed wire.

[0014] Optionally, the first terminal comprises a fixed value terminal and a variable value terminal, the end of the fixed wire is connected to the fixed value terminal, and the variable wire is connected to the variable value terminal.

[0015] Optionally, a resistance value identifier is arranged on the second carrier plate and located at one side of the fixed value terminal.

[0016] The insulation detection circuit can detect the resistance value of the fixed value resistance, and compare the measured resistance value with the actual resistance value of the fixed value resistance, so as to know the accuracy of the detection result. The insulation detection circuit is detected, so as to ensure the accuracy of the detection result of the insulation detection circuit. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings of the embodiments will be briefly introduced as follows. Obviously, the drawings described in the following description only relate to some embodiments of the present application, and are not a limitation on the present application.

[0018] Figure 1 A front view of an insulation detection test fixture according to an embodiment of the present application is provided.

[0019] Figure 2A top view of an insulation detection test fixture provided by an embodiment of the present application;

[0020] Fig. 3 is a top view and a bottom view of a second carrier plate provided by an embodiment of the present application, wherein, Figure 3a the top view, Figure 3b the bottom view.

[0021] Explanation of reference signs:

[0022] Fixed value resistance assembly 10; first terminal 20; second terminal 30; first carrier plate 40; second carrier plate 50; support rod 60; switch piece 70; terminal 80; fixing piece 90; fixed value terminal 201; variable value terminal 202. DETAILED DESCRIPTION

[0023] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the present application will be further described below in combination with the drawings and through specific embodiments.

[0024] In the description of the present application, unless explicitly defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In the present application, unless explicitly defined and limited otherwise, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or it can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and oblique above of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and oblique below of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0026] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0027] like Figure 1 , Figure 2 Figure 3 shows a structural diagram of an insulation testing fixture provided in this application embodiment. This application embodiment provides an insulation testing fixture including: a carrier plate and a fixed resistor assembly 10, a first terminal 20, and a second terminal 30 disposed on the carrier plate. The first end of the fixed resistor assembly 10 is electrically connected to the first terminal 20, and the second end of the fixed resistor assembly 10 is electrically connected to the second terminal 30. Both the first terminal 20 and the second terminal 30 are used to connect to the terminals of a circuit to be diagnosed, which is configured to measure resistance values.

[0028] Specifically, the circuit to be diagnosed is the insulation detection circuit.

[0029] The first terminal 20 and the second terminal 30 of the testing fixture are connected to the insulation testing circuit. The insulation testing circuit can measure the resistance value of the fixed resistor component 10. Since the resistance value of the fixed resistor is known, comparing the known resistance value with the measured resistance value reveals the accuracy of the resistance detection of the circuit under diagnosis, i.e., the insulation testing circuit. By testing the circuit under diagnosis, the accuracy of the test results can be ensured, reducing the impact of problems with the insulation testing circuit on the insulation test results of energy storage devices such as battery packs and charging piles.

[0030] The fixed resistor assembly 10 includes several resistors connected in series and / or in parallel. Different resistance values ​​can be achieved by connecting the auxiliary resistors in series and parallel.

[0031] like Figure 1 As shown, the carrier plate includes a first direction ( Figure 1 Set in the middle X-axis direction and along the second direction ( Figure 1 A first carrier plate 40 and several second carrier plates 50 are distributed in the Y-axis direction. The first carrier plate 40 is located on one side of the second carrier plate 50 in the second direction, and the first direction is perpendicular to the second direction. The first terminal 20 and the second terminal 30 are both disposed on the first carrier plate 40. The resistors are distributed on the second carrier plates 50 according to the resistance value range, and the resistance values ​​within the same range are disposed on the same second carrier plate 50.

[0032] With the above configuration, the first terminal 20 and the second terminal 30, used to connect the circuit to be diagnosed, are placed on the topmost first carrier board 40, facilitating connection with the insulation detection circuit. Layering several resistors saves space.

[0033] It can be understood that the second carrier plate 50 is provided with a plurality of second carrier plates 50 distributed along the second direction, and each second carrier plate 50 is arranged along the first direction, and resistors in different resistance value ranges are arranged on different second carrier plates 50. For example, the resistance value range includes a low resistance value range and a high resistance value range, and the resistors in the low resistance value range are arranged on one of the second carrier plates 50, and the resistors in the high resistance value range are arranged on another of the second carrier plates 50. The low resistance value range can be 0-500KΩ, and the high resistance value range can be greater than 500KΩ. In other embodiments, the resistance value range can be divided into other ranges according to requirements, which will not be limited here.

[0034] The resistors in the same resistance value range are arranged on the same second carrier plate 50, so that the insulation detection circuit can detect the resistors in different resistance value ranges, and the detection accuracy of the insulation detection circuit for resistors in each resistance value range can be measured.

[0035] The insulation detection test fixture further comprises a support rod 60 connected by the support rod 60. Specifically, the support rod 60 is arranged at the four corners of the first carrier plate 40 and the second carrier plate 50, and penetrates the first carrier plate 40 and the second carrier plate 50. A plurality of fixing nuts corresponding to the first carrier plate 40 and the second carrier plate 50 are threadedly connected to the support rod 60, and the fixing nuts are arranged at the bottom of the corresponding first carrier plate 40 and / or second carrier plate 50. The fixing nut supports the corresponding first carrier plate 40 and / or second carrier plate 50, and fixes the position of the first carrier plate 40 and the second carrier plate 50.

[0036] By adjusting the position of the nut, the position of the first carrier plate 40 and the second carrier plate 50 can be adjusted, and the distance between the first carrier plate 40 and the second carrier plate 50 can be adjusted.

[0037] The first terminal 20 is provided with a plurality of first terminals 20, and the second terminal 30 is provided with one, and the resistor is connected to the circuit to be diagnosed through the first terminal 20 and the second terminal 30. Each first terminal 20 represents a different resistance value. Each first terminal 20 and the resistor are connected to a switch 70, and the switch 70 is used to connect and disconnect the electrical connection of the corresponding first terminal 20 and the resistor.

[0038] In some embodiments, there is at least one resistor, the first end of which is electrically connected to one of the first terminals 20, and a switch 70 is arranged between the first end of the resistor and the first terminal 20, and the second end of the resistor is electrically connected to the second terminal 30. The resistance value represented by the first terminal 20 is the resistance value of the resistor. During testing, the switch 70 corresponding to the resistor is opened, so that the resistor is connected between the corresponding first terminal 20, and then the resistor is connected to the wiring terminal of the circuit to be diagnosed through the second terminal 30 and the corresponding first terminal 20, that is, the resistor is connected to the circuit to be diagnosed, so that the resistance value of the resistor can be measured through the circuit to be diagnosed.

[0039] In some other embodiments, there is at least one set of series resistors connected to the circuit to be diagnosed through the first terminal 20 and the second terminal 30, and the resistance value represented by the first terminal 20 is the resistance value of the corresponding series resistors. It can be understood that a set of series resistors at least includes two resistors. For example, the series resistors include a first resistor and a second resistor, the first end of the first resistor is electrically connected to one of the first terminals 20, and a switch 70 is arranged between the first end of the first resistor and the corresponding first terminal 20; the second end of the first resistor is electrically connected to the first end of the second resistor, and the second end of the second resistor is electrically connected to the second terminal 30, thereby realizing the connection of the series resistors and the first terminal 20 and the second terminal 30, and the first terminal 20 is the resistance value of the first resistor and the second resistor. In the example, the first end of the first resistor is the first end of the series resistors, and the second end of the second resistor is the second end of the series resistors. The above example is only an exemplary description and is not a limiting description.

[0040] Through the above arrangement, the second ends of the resistors are all electrically connected to the same second terminal 30. When different resistors are measured, only the first terminal 20 connected to the insulation detection circuit needs to be replaced, which is convenient to operate. Moreover, only one second terminal 30 can save cost and space.

[0041] In some embodiments, the second carrier plate 50 is provided with wiring terminals 80 at both ends of the resistors, the two ends of the resistors are respectively connected to the corresponding wiring terminals 80, and the second carrier plate 50 is further provided with a wire, one end of the wire is used to connect one of the wiring terminals 80 corresponding to one of the resistors, and the other end of the wire is used to connect one of the wiring terminals 80 corresponding to the other resistor or connect the first wiring terminal or connect the second wiring terminal, so that the resistors are connected in series / parallel through the wiring terminals 80 and the wire, and the resistors are electrically connected to the first wiring terminal and / or the second wiring terminal through the wiring terminals and the wire.

[0042] In a specific embodiment, the wire and the wiring terminal 80 are detachably connected. Through this arrangement, the connection mode of the wire and the wiring terminal 80 can be adjusted to match resistors of different resistance values.

[0043] In a specific embodiment, the wires are divided into fixed wires and variable wires, and the second carrier plate 50 is provided with a fixing member 90. The fixed wires and the variable wires are both used to connect the terminal 80, and can realize the connection between resistors, or the connection between resistors and the first terminal and the second terminal. The fixing member 90 is used to fix the position of the arrangement of the fixed wires.

[0044] The first terminal 20 includes a fixed value terminal 201 and a variable value terminal 202. The end of the fixed wire is connected to the fixed value terminal 201, and the fixed wire is connected to the fixed value terminal 201. The variable wire is connected to the variable value terminal 202.

[0045] Specifically, the fixed wire is used to connect several resistors, and connect the several resistors to the fixed value terminal 201, and access the to-be-diagnosed circuit to form a fixed combination of resistance values. For example, the fixed wire can connect a first resistor and a second resistor, so that the first resistor and the second resistor form a fixed combination of resistance values, and the resistance value is the resistance sum of the first resistor and the second resistor, and the first resistor and the second resistor are connected to the fixed value terminal 201, so as to connect the fixed combination resistance value formed by the first resistor and the second resistor to the fixed value terminal 201, and facilitate the detection of the to-be-diagnosed circuit.

[0046] Specifically, one end of the first fixed wire is connected to one of the fixed value terminals 201, and the other end is connected to the first terminal 80 of the first resistor; one end of the second fixed wire is connected to the second terminal 80 of the first resistor, and the other end is connected to the first terminal 80 of the second resistor; one end of the third fixed wire is connected to the second terminal 80 of the second resistor, and the other end is connected to the second terminal. When the first resistor and the second resistor need to be connected to the to-be-diagnosed circuit, the fixed value terminal 201 and the second terminal are connected to the terminal of the to-be-diagnosed circuit.

[0047] When the first resistor needs to be connected to the circuit to be diagnosed alone, the ends of the first fixed conductor and the second fixed conductor are pulled out from the terminal 80 of the first resistor, the first terminal 80 of the first resistor is connected to one of the variable terminals 202 by using a first variable conductor, and the second terminal 80 of the first resistor is connected to the second terminal by using another variable conductor. At this time, the first fixed conductor and the second fixed conductor are disconnected from the first resistor, the first fixed conductor and the second fixed conductor are fixed on the second carrier plate 50 by the fixing member 90, the positions and arrangements of the first fixed conductor and the second fixed conductor on the second carrier plate 50 do not change, and the ends of the first fixed conductor and the second fixed conductor are located on the side corresponding to the first resistor and / or the fixed value terminal 201, which facilitates the insertion of the first fixed conductor and the second fixed conductor into the corresponding terminal 80 when the first resistor and the second resistor need to be connected to the circuit to be diagnosed again, and the operation is convenient, and the connection lines between the resistors with fixed resistance values can be avoided.

[0048] It can be understood that the fixed conductor can also directly connect a single resistor to the fixed value terminal 201. The specific connection structure is as follows: one end of the fourth fixed conductor is connected to one of the fixed value terminals 201, and the other end is connected to the first terminal 80 of the third resistor; one end of the fifth fixed conductor is connected to the second terminal 80 of the third resistor, and the other end is connected to the second terminal. When the third resistor needs to be connected to other resistors in an active matching manner, the fourth fixed conductor and the fifth fixed conductor are pulled out from the corresponding terminal 80 of the third resistor, and the third resistor and other resistors and the variable value terminal 202 are connected by the variable conductor.

[0049] In a specific embodiment, the first carrier plate 40 is provided with a resistance value mark on the side of the fixed value terminal 201. The resistance value mark corresponds to a single resistor or a resistor group forming a fixed matching resistance value, so as to facilitate the staff to understand the resistance value connected to the circuit to be diagnosed, and to facilitate the staff to compare the actual resistance value and the measured resistance value.

[0050] The above only describes exemplary embodiments of the present application, and is not used to limit the protection scope of the present application, and the protection scope of the present application is determined by the appended claims.

Claims

1. An insulation detection test fixture, characterized by, The insulation detection test fixture comprises: The carrier plate and the fixed resistance component (10), the first terminal (20) and the second terminal (30) arranged on the carrier plate, wherein the first end of the fixed resistance component (10) is electrically connected to the first terminal (20), the second end of the fixed resistance component (10) is electrically connected to the second terminal (30), the first terminal (20) and the second terminal (30) are both used for connecting the wiring terminal of the circuit to be diagnosed, and the circuit to be diagnosed is configured to measure the resistance value.

2. The insulation detection test fixture of claim 1, wherein The fixed resistance component (10) comprises a plurality of resistors, and the plurality of resistors are connected in series and / or parallel.

3. The insulation detection test fixture of claim 2, wherein, The carrier plate comprises a first carrier plate (40) arranged along a first direction and a plurality of second carrier plates (50) distributed along a second direction, the first carrier plate (40) is located on one side of the second carrier plate (50) in the second direction, and the first direction is perpendicular to the second direction; the first terminal (20) and the second terminal (30) are both arranged on the first carrier plate (40); and the resistors are distributed on the second carrier plate (50) according to the resistance value range, and the resistance values in the same range are arranged on the same second carrier plate (50).

4. The insulation detection test fixture of claim 3, wherein, The insulation detection test fixture further comprises a support rod (60), and the first carrier plate (40) and the second carrier plate (50) are connected through the support rod (60).

5. The insulation detection test fixture according to claim 3, wherein The first terminal (20) is provided in plurality, the second terminal (30) is provided in one, the resistors are connected to the circuit to be diagnosed through the first terminal (20) and the second terminal (30), a switch piece (70) is arranged between each first terminal (20) and the first end of the resistor, and the switch piece (70) is used for connecting and disconnecting the electrical connection between the corresponding first terminal (20) and the resistor.

6. The insulation detection test fixture according to claim 3, wherein A wiring terminal (80) is arranged on the second carrier plate (50) and located at both ends of the resistor, and both ends of the resistor are connected to the corresponding wiring terminal (80); a wire is further arranged on the second carrier plate (50), one end of the wire is used for connecting one of the wiring terminals (80) corresponding to one of the resistors, and the other end of the wire is used for connecting one of the wiring terminals (80) corresponding to the other resistor or connecting the first wiring terminal or connecting the second wiring terminal.

7. The insulation detection test fixture of claim 6, wherein, The wire and the wiring terminal (80) are detachably connected.

8. The insulation detection test fixture of claim 6, wherein, The wire is divided into fixed wires and variable wires, and a fixing piece (90) is arranged on the second carrier plate (50), and the fixed wires and the variable wires are both used for being connected to the wiring terminal (80); and the fixing piece (90) is used for fixing the arrangement of the fixed wires.

9. The insulation detection test fixture of claim 8, wherein, The first terminal (20) comprises a fixed terminal (201) and a variable terminal (202), the end of the fixed wire is connected to the fixed terminal (201), and the variable wire is connected to the variable terminal (202).

10. The insulation detection test fixture of claim 9, wherein, The second carrier board (50) is provided with resistance value marks on one side of the fixed value terminal (201).

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