Current sampling test tool

Abstract

The utility model discloses a current sampling test tool comprising a tested board module which is provided with a first point and a second point; the constant current source is used for providing constant current to the first point and the second point; and the control module is arranged on a connection path between the constant current source and the tested board module so as to realize that the tested board module is in a charging state or a discharging state. The two relays and the two selection switches are adopted to form a complete current sampling test tool structure, the structure is simple and compact, and the hardware cost and the circuit complexity are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to current sampling technical field especially relates to a current sampling test tool. BACKGROUND

[0002] The prior art needs to build a complex circuit or use multiple independent sampling systems to measure the charging and discharging currents respectively, resulting in high hardware cost and complex circuit structure, and using more switching elements or complex switching circuits to change the current direction not only increases the design and debugging difficulty of the circuit, but also reduces the reliability of the system and increases the probability of failure. Therefore, the utility model provides a current sampling test tool. SUMMARY

[0003] In order to overcome at least one of the defects of the prior art, the utility model provides a current sampling test tool. Two relays and two selector switches are used to form a complete current sampling test tool structure, which is simple and compact, reducing the hardware cost and circuit complexity.

[0004] The utility model discloses a current sampling test tool which comprises a measured board module, a constant current source and a control module.

[0005] A current sampling test tool comprises a measured board module, a constant current source and a control module.

[0006] The measured board module is used as the test object, the constant current source provides stable current to ensure measurement accuracy, and the control module can control the charging and discharging states. The overall structure is simple and compact.

[0007] Further, the control module comprises a first relay and a second relay, the first end and the second end of the first relay are connected with the first point, and the first end and the second end of the second relay are connected with the second point.

[0008] Compared with a complex control circuit, the two relays have a simple structure and low cost, and are easy to maintain and debug.

[0009] Further, the control module further comprises a first selector switch and a second selector switch connected with the constant current source, the first selector switch is in communication with the first end of the first relay or the first end of the second relay, and the second selector switch is in communication with the second end of the first relay or the second end of the second relay.

[0010] By adopting the above scheme, the current path can be flexibly changed, and then the precise control on the charge and discharge state of the measured board module is realized.

[0011] Further, the first selection switch and the connection path of the constant current source, and the second selection switch and the connection path of the constant current source are provided with resistors.

[0012] By adopting the above scheme, the resistor can cooperate with the constant current source to measure the current, and the accuracy and reliability of current sampling are improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a discharge principle diagram of the embodiment of the utility model;

[0014] Fig. 2 It is a charge principle diagram of the embodiment of the utility model;

[0015] Among them, the meaning of the reference sign is as follows: 1, constant current source; 2, control module; 3, resistor; 4, first relay; 5, second relay; 6, first selection switch; 7, second selection switch; 8, measured board module; 9, first point; 10, second point. DETAILED DESCRIPTION

[0016] In order to better understand and implement, the technical scheme in the embodiment of the utility model will be clearly and completely described and discussed in combination with the drawings of the utility model below, obviously, only part of the examples of the utility model are described here, and not all examples, based on the examples in the utility model, all other examples obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0017] In order to facilitate the understanding of the embodiment of the utility model, the following will be further explained and described with specific examples as examples in combination with the drawings, and each embodiment does not constitute the limitation of the embodiment of the utility model.

[0018] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as the limitation of the utility model.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0020] Referring to Figs. 1-2 The utility model discloses a current sampling test frock: including the measured board module 8, constant current source 1 and control module 2, the measured board module 8 has first point 9 and second point 10, constant current source 1 is used to provide constant current to first point 9 and second point 10, control module 2 is located the connecting passage between constant current source 1 and measured board module 8 to realize measured board module 8 is charged state or discharge state, and measured board module 8 is as test object, and constant current source 1 provides stable current and guarantees measurement accuracy, and control module 2 can control charge and discharge state, and the overall structure is simple and compact.

[0021] In the embodiment, the control module 2 includes first relay 4, second relay 5, first selection switch 6 and second selection switch 7, the first end and the second end of first relay 4 are connected with first point 9, the first end and the second end of second relay 5 are connected with second point 10, the setting of two relays, compared with the complex control circuit, simple structure, lower cost, while convenient maintenance and debugging, first selection switch 6 is communicated with the first end of first relay 4 or the first end of second relay 5, and second selection switch 7 is communicated with the second end of first relay 4 or the second end of second relay 5. The current path can be changed flexibly, and then the accurate control of the charge and discharge state of measured board module 8 is realized.

[0022] Among them, the connecting passage of first selection switch 6 and constant current source 1, the connecting passage between second selection switch 7 and constant current source 1 is provided with resistance 3, and resistance 3 can be used for the measurement of current in cooperation with constant current source 1, which improves the accuracy and reliability of current sampling.

[0023] The utility model discloses a working principle can realize the current of different directions of charging or discharging in the measured board module 8 is gathered. When the current is from the first point 9 of measured board module 8 to the second point 10, the battery of measured board module 8 is in the discharging state, when the current is from the second point 10 of measured board module 8 to the first point 9, the battery of measured board module 8 is in the charging state. When the first selection switch 6 is connected with the first end of the first relay 4, and the second selection switch 7 is connected with the second end of the second relay 5, the current flows from the first end of the first relay 4 to the first point 9 of measured board module 8, and from the first point 9 to the second point 10 of measured board module 8, and the battery is in the discharging state at this time, when the first selection switch 6 is connected with the first end of the second relay 5, and the second selection switch 7 is connected with the second end of the first relay 4, the current flows from the first end of the second relay 5 to the second point 10 of measured board module 8, and from the second point 10 to the first point 9 of measured board module 8, and the battery is in the charging state at this time.

[0024] The technical means disclosed in the utility model scheme is not only limited to the technical means disclosed in the above-mentioned embodiment, but also includes the technical scheme composed of any combination of the above technical features. It should be pointed out that, for ordinary skilled persons in the technical field, under the premise of not departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the utility model.

Claims

1. A current sampling test fixture, comprising: The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board.

2. The current sampling test tool of claim 1, wherein, The application relates to a constant current source for a test board.

3. The current sampling test tool of claim 2, wherein, The application relates to a constant current source for a test board.

4. The current sampling test tool of claim 3, wherein, The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for a test board. The application relates to a constant current source for

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