Testing device

Abstract

The utility model discloses a testing device. The testing device comprises a measuring instrument, a connecting piece and a wire, the connecting piece is used for being connected with a pole of a battery, so that the connecting piece is fixed on the pole of the battery, a plurality of connecting holes are formed in the connecting piece, and the diameters of the plurality of connecting holes are different; the wire is electrically connected with the measuring instrument, and the wire is inserted into the connecting hole and is electrically connected with the connecting sheet, so that the wire is connected with the connecting hole in an inserting manner, the wire is electrically connected with the connecting sheet through the connecting hole, and the measuring instrument can test the pole of the battery through the wire and the connecting sheet; the connection mode between the wire and the pole of the battery is simplified, the wire is prevented from being connected with the pole of the battery in a welding mode, the testing convenience of the testing device on the pole of the battery is improved, meanwhile, a plurality of connection holes with different diameters are formed, the insertion of various wires with different sizes is met, and the testing efficiency is improved. And the connection operability and stability between the wire and the connecting sheet are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing devices, in particular to a testing device. BACKGROUND

[0002] With the development of science and technology, the market scale of the lithium battery detection industry is rapidly expanding, and the important part of the automatic assembly production line of lithium battery is also expanding. In order to understand the electrical performance and safety performance of the battery, the battery production unit and the battery use unit will test the battery before putting it into the market. At present, most of the square aluminum shell batteries are convenient for testing the connection test line, and before testing, a test device will be welded on the positive and negative poles of the battery. When the battery is tested, the lead of the test device is connected with the aluminum row welded on the pole of the battery by using a bolt, and then the screw is tightened to fix it, which causes the existing test device to have poor convenience for testing the pole of the battery. SUMMARY

[0003] One object of the present application is to provide a testing device which aims to solve the technical problem that the test device has poor convenience for testing the pole of the battery when the lead of the test device is connected with the aluminum row welded on the pole of the battery by using a bolt, and then the screw is tightened to fix it.

[0004] To achieve the above object, one scheme provided by the present application is: a testing device, the testing device is used for connecting with the pole of the battery, and the testing device comprises:

[0005] a measuring instrument;

[0006] a connecting sheet used for connecting with the pole of the battery, the connecting sheet is provided with a plurality of connecting holes, and the diameters of the plurality of connecting holes are different; and

[0007] a lead wire electrically connected with the measuring instrument, the lead wire is inserted into the connecting hole and electrically connected with the connecting sheet.

[0008] Optionally, the diameter of the lead wire is R1, the diameter of the connecting hole matched with the lead wire is R2, and 1≤R2 / R1≤1.2.

[0009] Optionally, the thickness of the connecting sheet is h, the resistivity of the connecting sheet is p, and 0.5≤h / p≤1.

[0010] Optionally, the connecting sheet comprises a main body part, a first connecting part and a second connecting part, the main body part is used for connecting with the pole of the battery, the first connecting part and the second connecting part are arranged on the adjacent two sides or opposite two sides of the main body part, a plurality of the connecting holes are arranged on the first connecting part, and a plurality of the connecting holes are arranged on the second connecting part.

[0011] The lead wire includes a first lead wire and a second lead wire, the first lead wire is inserted into the connecting hole on the first connecting part, and the second lead wire is inserted into the connecting hole on the second connecting part.

[0012] Optionally, the first connecting part and the second connecting part are symmetrically arranged relative to the main body part.

[0013] Optionally, in the direction away from the main body part, the plurality of connecting holes are sequentially and spacedly arranged, and the diameters of the connecting holes gradually decrease.

[0014] Optionally, the test device further comprises a temperature sensing wire, a clamping groove is formed on the main body part, and the temperature sensing wire is assembled in the clamping groove.

[0015] Optionally, a threaded structure is arranged on the hole wall of the connecting hole, and the lead wire is threadedly connected with the connecting hole.

[0016] Optionally, the connecting piece includes a first layer and a second layer, the second layer wraps the first layer, the material of the first layer is copper, and the material of the second layer is chromium or tin.

[0017] Optionally, the included angle between the first connecting part and the main body part is obtuse, and the included angle between the second connecting part and the main body part is obtuse.

[0018] The beneficial effects of the present application are:

[0019] The utility model provides a test device, connecting piece is used for with the pole of battery connection, to facilitate connecting piece fixed on the pole of battery, connecting piece is equipped with a plurality of connecting holes, and the diameters of a plurality of connecting holes are different, lead wire and measuring appearance electric connection, lead wire is inserted into the connecting hole and is electrically connected with connecting piece, to facilitate lead wire realizes the connection with connecting hole through the mode of inserting, so as to facilitate lead wire to realize electric connection with connecting piece through connecting hole, to realize that measuring appearance tests the pole of battery through lead wire, connecting piece, simplifies the connecting mode between lead wire and the pole of battery, avoids that lead wire is connected with the pole of battery through the mode of welding, improves the test convenience of test device to the pole of battery, simultaneously, arranges a plurality of different diameters connecting holes, satisfies a plurality of different sizes lead wire insertion, improves the connecting operability and stability between lead wire and connecting piece. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings from the structures shown in these drawings without creative labor.

[0021] Figure 1 is an assembly structure schematic diagram of the testing device provided by the embodiment of the present application;

[0022] Figure 2 is a front view of a connecting piece of the testing device provided by the embodiment of the present application;

[0023] Figure 3 is a side view of the main body part and the first connecting part of the testing device provided by the embodiment of the present application;

[0024] Figure 4 is a side view of the main body part and the second connecting part of the testing device provided by the embodiment of the present application;

[0025] Figure 5 is a sectional view of the first layer and the second layer of the testing device provided by the embodiment of the present application.

[0026] Explanation of reference numerals:

[0027] 100, testing device;

[0028] 10, measuring instrument;

[0029] 20, connecting piece; 20a, connecting hole; 21, main body part; 21a, clamping groove; 22, first connecting part; 23, second connecting part; 24, first layer; 25, second layer;

[0030] 30, wire; 31, first wire; 32, second wire;

[0031] 40, temperature sensing wire. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0033] Please refer to the drawings in the embodiments of the present application, Figure 1 The embodiment of the present application provides a testing device 100, which is used for connecting with a pole of a battery and testing the pole of the battery.

[0034] Please refer to the drawings in the embodiments of the present application, Figure 1In the embodiment of the present application, the test device 100 comprises a measuring instrument 10, a connecting piece 20 and a wire 30. The connecting piece 20 is used to be connected with the pole of the battery, so that the connecting piece 20 is fixed to the pole of the battery. The connecting piece 20 is provided with a plurality of connecting holes 20a with different diameters. The wire 30 is electrically connected with the measuring instrument 10. The wire 30 is inserted into the connecting hole 20a to be electrically connected with the connecting piece 20, so that the wire 30 is connected with the connecting hole 20a in a plug-in manner, thereby the wire 30 is electrically connected with the connecting piece 20 through the connecting hole 20a, so as to realize the test of the pole of the battery by the measuring instrument 10 through the wire 30 and the connecting piece 20. The connection mode between the wire 30 and the pole of the battery is simplified, and the wire 30 is connected with the pole of the battery by welding is avoided, thereby the convenience of the test of the pole of the battery by the test device 100 is improved.

[0035] Please refer to the accompanying drawings Figure 1 In the embodiment of the present application, the measuring instrument 10 is used to test the current, voltage, capacity, internal resistance, charging, discharging temperature and battery cycle life of the battery, and a curve graph is given.

[0036] Please refer to the accompanying drawings Figures 1-2 In the embodiment of the present application, the connecting piece 20 is used to be connected with the pole of the battery, so that the connecting piece 20 is fixed to the pole of the battery. The connecting piece 20 is provided with a plurality of connecting holes 20a which are arranged at intervals and used for the wire 30 to pass through. The plurality of connecting holes 20a have different diameters, so as to adapt to wires 30 of different sizes.

[0037] Please refer to the accompanying drawings Figures 1-2 In the embodiment of the present application, the wire 30 is arranged between the measuring instrument 10 and the connecting piece 20. The wire 30 is electrically connected with the measuring instrument 10, so as to realize the power supply between the wire 30 and the measuring instrument 10. The wire 30 is inserted into the connecting hole 20a to be electrically connected with the connecting piece 20, so that the wire 30 is connected with the connecting hole 20a in a plug-in manner, thereby the wire 30 is electrically connected with the connecting piece 20 through the connecting hole 20a, so as to realize the test of the pole of the battery by the measuring instrument 10 through the wire 30 and the connecting piece 20. The connection mode between the wire 30 and the pole of the battery is simplified, and the wire 30 is connected with the pole of the battery by welding is avoided, thereby the convenience of the test of the pole of the battery by the test device 100 is improved. Meanwhile, a plurality of connecting holes 20a with different diameters are arranged to meet the insertion of wires 30 of different sizes. The larger the outer diameter of the wire 30 is, the larger the connecting hole 20a is adapted to. The smaller the outer diameter of the wire 30 is, the smaller the connecting hole 20a is adapted to. The connection operability and stability between the wire 30 and the connecting piece 20 are improved.

[0038] Please refer to the accompanying drawingsFigures 1-2 The connecting piece 20 has two, and the two connecting pieces 20 are fixed to the positive pole and the negative pole of the battery, so that the tester 10 tests the positive pole and the negative pole of the battery through the plurality of wires 30, and the testing efficiency of the tester 10 on the battery is improved.

[0039] The diameter of the wire 30 is R1, and the diameter of the connecting hole 20a matched with the wire 30 is R2, 1≤R2 / R1≤1.2, at this time, there are connecting holes 20a with different diameters on the connecting piece 20, and in use, the wire 30 is inserted into the connecting hole 20a, and the diameter of the connecting hole 20a is limited, mainly R2 / R1=1~1.07. Generally, mainly R2 / R1=1, the connecting hole 20a is matched with the wire 30. But because the expansion coefficient of metal is different at different battery test temperatures, the diameter of the connecting hole 20a changes, and through long-term testing, it is found that when R2 / R1=1.05, the connection of the wire 30 and the connecting piece 20 is optimal. Therefore, it is a reasonable range that R2 / R1=1~1.07. When the test current is larger, the diameter of the wire 30 used is larger, and when the test current is smaller, the diameter of the wire 30 used is smaller.

[0040] The thickness of the connecting piece 20 is h, and the resistivity of the connecting piece 20 is p, 0.5≤h / p≤1, at this time, the connecting piece 20 is a conductive piece, in order to ensure that the resistance of the connecting piece 20 using different metals is consistent, and ensure the consistency of the test, the relationship between the resistivity of the connecting piece 20 and the thickness of the connecting piece 20 is mainly h=(0.5~1)*p, according to the different base materials of the connecting piece 20 selected, the thickness h of the connecting piece 20 also changes, when the resistivity of the connecting piece 20 is larger, the thickness of the connecting piece 20 is larger, and when the resistivity of the connecting piece 20 is smaller, the thickness of the connecting piece 20 is smaller.

[0041] Please refer to the attached Figure 2 The connecting piece 20 includes a main body part 21, a first connecting part 22 and a second connecting part 23, the main body part 21 is used to connect with the pole of the battery, so that the main body part 21 is fixed to the pole of the battery, thereby facilitating the connecting piece 20 to connect with the pole of the battery through the main body part 21. The first connecting part 22 and the second connecting part 23 are arranged on the adjacent two sides or opposite two sides of the main body part 21, so that the first connecting part 22 and the second connecting part 23 are fixed to the adjacent two sides of the main body part 21, thereby facilitating the first connecting part 22 and the second connecting part 23 to be at different positions of the main body part 21, and avoiding the wire 30 connected to the first connecting part 22 and the wire 30 connected to the second connecting part 23 from being entangled.

[0042] Please refer to the attached Figure 2The first connecting part 22 is provided with a plurality of connecting holes 20a arranged along the length direction of the first connecting part 22, so that the first connecting part 22 is electrically connected with the wire 30 through the connecting holes 20a. The second connecting part 23 is provided with a plurality of connecting holes 20a arranged along the length direction of the second connecting part 23, so that the second connecting part 23 is electrically connected with the wire 30 through the connecting holes 20a.

[0043] Please refer to the accompanying drawings Figures 1-2 The wire 30 includes a first wire 31 and a second wire 32. One end of the first wire 31 is inserted into the connecting hole 20a on the first connecting part 22, so that the one end of the first wire 31 is electrically connected with the first connecting part 22. The other end of the first wire 31 is electrically connected with the measuring instrument 10, so that the measuring instrument 10 tests the current of the first connecting part 22 through the first wire 31. One end of the second wire 32 is inserted into the connecting hole 20a on the second connecting part 23, so that the one end of the second wire 32 is electrically connected with the second connecting part 23. The other end of the second wire 32 is electrically connected with the measuring instrument 10, so that the measuring instrument 10 tests the voltage of the second connecting part 23 through the second wire 32, thereby the first wire 31 and the second wire 32 do not interfere with each other.

[0044] Please refer to the accompanying drawings Figures 1-2 The first connecting part 22 and the second connecting part 23 are symmetrically arranged about the main body part 21, so that the connecting piece 20 is symmetrically arranged, and the wire 30 can be inserted into each side. The two sides are separated to ensure that the first wire 31 and the second wire 32 work separately during the battery test, prevent the first wire 31 from being affected by the second wire 32, ensure the voltage data collection of the battery is more accurate, and the test result can reflect the real situation of the battery.

[0045] Please refer to the accompanying drawings Figures 1-2 The plurality of connecting holes 20a are sequentially and spacedly arranged away from the main body part 21, and the diameter of the connecting hole 20a gradually decreases. At this time, the main body part 21 is supported by the pole of the battery, so the connecting hole 20a close to the main body part 21 can be opened a little larger. The connecting part is free at a distance from the main body part 21, so the connecting hole 20a away from the main body part 21 can be opened a little smaller. The smaller the diameter of the connecting hole 20a, the smaller the diameter of the wire 30 inserted into the connecting hole 20a. The larger the diameter of the connecting hole 20a, the larger the diameter of the wire 30 inserted into the connecting hole 20a.

[0046] Please refer to the accompanying drawings Figure 1The testing device 100 further comprises a temperature sensing wire 40, which is arranged between the meter 10 and the main body 21, and one end of the temperature sensing wire 40 is electrically connected to the meter 10, so that the temperature sensing wire 40 is powered by the meter 10, and the meter 10 measures the temperature of the pole of the battery through the temperature sensing wire 40. The main body 21 is provided with a clamping groove 21a, and the temperature sensing wire 40 is arranged in the clamping groove 21a, so that the other end of the temperature sensing wire 40 is connected to the main body 21 through the clamping groove 21a, and the temperature sensing wire is tightly attached to the pole of the battery. The connection stability between the temperature sensing wire 40 and the main body 21 is ensured, the temperature sensing wire 40 is prevented from falling off, and the continuity of data recording is ensured.

[0047] The hole wall of the connecting hole 20a is provided with a threaded structure, and the lead wire 30 is screwed with the connecting hole 20a, so as to further ensure the connection stability between the lead wire 30 and the connecting hole 20a, and prevent the lead wire 30 from being separated from the connecting hole 20a during the testing process. Optionally, the threaded structure is an internal thread.

[0048] Please refer to the accompanying drawings Figure 5 The connecting piece 20 comprises a first layer 24 and a second layer 25, and the second layer 25 wraps the first layer 24, so as to protect the outer surface of the first layer 24. The material of the first layer 24 is copper, and the material of the second layer 25 is chromium or tin. Copper has good electrical conductivity, but brass is easy to oxidize in the natural environment and generate copper rust. During the battery testing process, copper rust will generate heat at the connection, so the brass surface is plated with chromium or tin to ensure the performance of the connecting piece 20.

[0049] Please refer to the accompanying drawings Figures 3-4 The included angle between the first connecting part 22 and the main body 21 is obtuse, so that there is a wire space between the first connecting part 22 and the upper surface of the pole of the battery, so that the first lead wire 31 passes through the connecting hole 20a of the first connecting part 22. The included angle between the second connecting part 23 and the main body 21 is obtuse, so that there is a wire space between the second connecting part 23 and the upper surface of the pole of the battery, so that the second lead wire 32 passes through the connecting hole 20a of the second connecting part 23.

[0050] The beneficial effects of the present application are:

[0051] The utility model provides a kind of testing device 100, connecting piece 20 is used to be connected with the pole of battery, so that connecting piece 20 is fixed on the pole of battery, connecting piece 20 is equipped with multiple connecting holes 20a, the diameter of multiple connecting holes 20a is different;Wire 30 is electrically connected with measuring instrument 10, wire 30 is inserted into connecting hole 20a and is electrically connected with connecting piece 20, so that wire 30 is connected with connecting hole 20a by the mode of insertion, so that wire 30 is electrically connected with connecting piece 20 by connecting hole 20a, to realize that measuring instrument 10 is tested to the pole of battery by wire 30, connecting piece 20, the connecting mode between wire 30 and the pole of battery is simplified, wire 30 is connected with the pole of battery by the mode of welding is avoided, the test convenience of testing device 100 to the pole of battery is improved, simultaneously, multiple connecting holes 20a of different diameters are arranged, meet multiple different sizes wire 30 insertion, improve the connecting operability and stability between wire 30 and connecting piece 20.

[0052] It should be noted that all directional indications, such as up, down, left, right, front, back, and the like, are merely used for convenience of description and are not intended to limit the application to a particular orientation.

[0053] It should also be noted that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.

[0054] In addition, the terms "first", "second", and the like, as used in the description and the claims, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an order of magnitude. Thus, a feature referred to as "first" can be a feature of at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0055] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made by the contents of the present application specification and drawings, or directly / indirectly applied in other related technical fields under the inventive concept of the present application are included in the patent protection scope of the present application.

Claims

1. A testing device for connection with a terminal post of a battery, characterized in that, The test device comprises: a measuring instrument; a connecting piece for connecting with a pole of the battery, the connecting piece being provided with a plurality of connecting holes, the diameters of the plurality of connecting holes being different; and a wire electrically connected with the measuring instrument, the wire being inserted into the connecting hole electrically connected with the connecting piece.

2. The test device of claim 1, wherein, The diameter of the wire is R1, the diameter of the connecting hole matched with the wire is R2, and 1≤R2 / R1≤1.

2.

3. The test device of claim 1, wherein, The thickness of the connecting piece is h, and the resistivity of the connecting piece is p, and 0.5≤h / p≤1.

4. The test device according to any one of claims 1 to 3, characterized in that The connecting piece comprises a main body part, a first connecting part and a second connecting part, the main body part is used for connecting with the pole of the battery, the first connecting part and the second connecting part are arranged on two adjacent sides or opposite sides of the main body part, a plurality of the connecting holes are arranged on the first connecting part, and a plurality of the connecting holes are arranged on the second connecting part. The wire comprises a first wire and a second wire, the first wire is inserted into the connecting hole on the first connecting part, and the second wire is inserted into the connecting hole on the second connecting part.

5. The test device of claim 4, wherein, The first connecting part and the second connecting part are symmetrically arranged with respect to the main body part.

6. The test device of claim 4, wherein, In the direction away from the main body part, the plurality of connecting holes are sequentially and spacedly arranged, and the diameters of the connecting holes gradually decrease.

7. The test device of claim 4, wherein, The test device further comprises a temperature sensing wire, the main body part is provided with a clamping groove, and the temperature sensing wire is assembled in the clamping groove.

8. The test device according to any one of claims 1 to 3, characterized in that The connecting hole is provided with a threaded structure on the hole wall, and the wire and the connecting hole are threadedly connected.

9. The test device according to any one of claims 1 to 3, characterized in that The connecting piece comprises a first layer and a second layer, the second layer wraps the first layer, the material of the first layer is copper, and the material of the second layer is chromium or tin.

10. The test device of claim 4, wherein, The included angle between the first connecting part and the main body part is obtuse, and the included angle between the second connecting part and the main body part is obtuse.

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