Test tab

Abstract

The application provides a test connecting piece, which comprises a body part, a first connecting part and a second connecting part. The first connecting part is used for connecting a voltage test line for testing the voltage of a battery; the second connecting part is used for connecting a current test line for testing the current of the battery; the first connecting part and the second connecting part are electrically connected to two different parts of the body part, so that the voltage test line connected to the first connecting part and the current test line connected to the second connecting part can be separated by the body part. By installing the voltage test line and the current test line through the first connecting part and the second connecting part respectively, each test line can be conveniently and flexibly installed. On the other hand, the voltage test line for measuring and the current test line for power supply are equivalent to being connected into the circuit in which the battery is located at different parts of the test connecting piece respectively, so that the influence of the resistance of the connecting terminal used by the current test line on the measurement result can be reduced during measurement, and the detection precision is improved.

Description

Technical Field

[0001] This application relates to the field of battery performance testing technology, specifically to a test connector. Background Technology

[0002] Some batteries (such as cylindrical batteries) require performance testing before leaving the factory. Connecting tabs are installed on the battery electrodes by welding or other methods. After connecting the connecting tabs to current test lines and voltage test lines respectively, the current test lines supply power to the battery, and the voltage test lines are connected to instruments such as voltmeters to perform charge and discharge tests on the battery.

[0003] In related technologies, current test leads and voltage test leads are attached to corresponding holes on a connector using screws, with the battery test leads and voltage test leads installed in layers. Because the terminals of each test lead have resistance, the resistance between the instrument and the battery is increased during testing, leading to a voltage drop across the line. This limits the accuracy of testing in scenarios such as battery cycle charge / discharge tests. Utility Model Content

[0004] The embodiments of this application provide a test connector that can improve the technical problem of insufficient accuracy in battery performance testing.

[0005] An embodiment of this application provides a test connector for electrical connection to a battery, the test connector being provided with: Body part; The first connecting part is used to connect the voltage test line for testing the battery voltage; The second connection part is used to connect the current test line for testing the battery current; The first connecting portion and the second connecting portion are electrically connected to two different parts of the main body, such that the voltage test line connected to the first connecting portion and the current test line connected to the second connecting portion can be separated by the main body.

[0006] By adopting the above scheme, voltage test leads and current test leads are installed through the first and second connecting parts respectively. On the one hand, the two types of test leads are installed independently at different parts of the test connection piece, which allows for convenient and flexible installation of each test lead. On the other hand, the test lead used to measure ground voltage and the test lead used to supply power are equivalent to being connected to the circuit where the battery is located at different parts of the test connection piece. During measurement, the influence of the resistance of the connection terminal used by the current test lead on the measurement result can be reduced, thereby improving the accuracy of the test.

[0007] In one embodiment, the test connector further includes: A positioning part is formed in the main body part for positioning the connected battery; The positioning part and the first connecting part are separated by the body part; the positioning part and the second connecting part are separated by the body part.

[0008] By adopting the above scheme, the battery can be positioned and connected to the main body at the positioning part. This ensures that the battery and the test connection piece have a defined relative position when testing different batteries, reducing random errors during the testing process and thus guaranteeing the accuracy of the test results. Furthermore, the battery does not directly contact the voltage and current test leads during testing, and the spatial distribution of the battery, voltage test leads, and current test leads is more reasonable.

[0009] In one embodiment, the first connecting portion and the second connecting portion are located on the same side of the positioning portion.

[0010] This solution, based on the independent installation of voltage and current test leads, allows for centralized distribution of voltage and current test leads, facilitating efficient use of space for wiring around the battery during performance testing.

[0011] In one embodiment, the positioning portion is configured as a positioning protrusion formed on the body portion, the positioning protrusion being used to align with the electrodes of a battery electrically connected to the test connector; Alternatively, the positioning portion may be configured as a positioning groove recessed in the body portion, the positioning groove being used to align with the electrodes of a battery electrically connected to the test connector.

[0012] This method can utilize positioning protrusions or positioning grooves to specifically achieve the positioning and installation of the test connector and the battery.

[0013] In one embodiment, the positioning portion is configured as a clearance groove formed at one end of the body portion, and the wall surface of the body portion forming the clearance groove is used to avoid the protruding terminal post of the battery electrically connected to the test connector.

[0014] This method utilizes clearance slots to align the test connector with the battery and avoids directly connecting a single test connector to the positive and negative terminals of the battery.

[0015] In one embodiment, the test connector is provided with a partition groove; The partition groove is located between the first connecting portion and the second connecting portion, so that the first connecting portion and the second connecting portion are separated by the partition groove.

[0016] This design separates the first and second connecting parts using a partition groove, allowing for the separate installation of voltage test leads and current test leads. At the same time, the spatial distribution of the first and second connecting parts can be relatively concentrated, limiting the overall volume of the test connection piece and facilitating the wiring of voltage and current test leads.

[0017] In one embodiment, the first connecting portion and the second connecting portion are integrally formed on two different parts of the body portion.

[0018] In this design, the first connecting part, the second connecting part, and the main body can be integrally formed, resulting in lower manufacturing costs. It also enables the test connector to stably connect the battery into the circuit, ensuring the stability of the electrical connection.

[0019] In one embodiment, the first connecting portion has a first test connection hole; the second connecting portion has a second test connection hole; the first test connection hole and the second test connection hole are spaced apart.

[0020] This solution involves positioning and installing the corresponding type of test leads at the first and second test connection holes, while avoiding direct contact between the voltage and current test leads to prevent them from affecting the test accuracy.

[0021] In one embodiment, the first test connection hole and the second test connection hole extend in the same direction or are inclined to each other.

[0022] This allows the voltage and current test leads to have the same or similar extension direction when connected to the test connector, which further facilitates wiring in space.

[0023] In one embodiment, the first connecting portion is provided with: A first connecting surface is used to limit or abut against the voltage test line connected to the first connecting part, and the first test connection hole passes through the first connecting surface; The second connecting part is provided with: The second connecting surface is used to limit or abut the current test lead connected to the second connecting part, and the second test connection hole passes through the second connecting surface; The first connecting surface and the second connecting surface are arranged parallel or coplanarly.

[0024] This allows voltage and current test leads to have the same or similar mounting reference surfaces, which facilitates the subsequent positioning and installation of test connectors, voltage test leads, and current test leads onto tooling. It also makes it easier to position various test leads during testing, thereby reducing the possibility of damage to various test leads.

[0025] In one embodiment, the body portion has: Connecting section, used for electrical connection to the battery electrodes; The connecting section protrudes from the surface of the connecting section; Both the first connecting portion and the second connecting portion are connected to the connecting segment.

[0026] This solution can be achieved by controlling the height of the connecting section protruding from the connecting section, so that the first connecting part and the second connecting part have the same or similar spacing with the main body, and thus achieve the purpose of setting the first connecting surface and the second connecting surface as coplanar, so as to ensure that the voltage test line and the current test line have the same or similar mounting reference surface, which facilitates the installation of various test lines.

[0027] The beneficial effects of the embodiments of this application are as follows: In the embodiments of this application, voltage test lines and current test lines are respectively installed through the first connecting part and the second connecting part. On the one hand, the two types of test lines are independently installed at different parts of the test connection piece, which makes it convenient and flexible to install each test line. On the other hand, the test line for measuring ground voltage and the test line for power supply are equivalent to being connected to the circuit where the battery is located at different parts of the test connection piece. During measurement, the influence of the resistance of the connection terminal used by the current test line on the measurement result can be reduced, thereby improving the accuracy of detection. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is the equivalent circuit diagram for battery performance testing in related technologies; Figure 2 This is a schematic diagram of the assembly of the test connector and the battery provided in an embodiment of this application; Figure 3 yes Figure 2 The test connector shown is the equivalent circuit diagram when participating in battery performance testing. Figure 4 This is a schematic diagram of the structure of the first type of test connector provided in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the second type of test connector provided in the embodiments of this application.

[0030] Explanation of reference numerals in the attached figures: 10. Cylindrical battery; 20. Current test leads; 30. Voltage test leads; 100. Test connector; 100a. Divider groove; 110. Main body; 111. Connecting section; 112. Joining section; 120. First connecting part; 121. First test connection hole; 122. First connecting surface; 130. Second connecting part; 131. Second test connection hole; 132. Second connecting surface; 140. Positioning part; 141. Positioning groove; 142. Clearance groove. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0032] As an introduction to this application, in related technologies, batteries need to be connected to a circuit for charge-discharge cycle performance testing before leaving the factory. Taking a cylindrical battery 10 as an example, during testing, connecting pieces are welded to the positive and negative terminals of the cylindrical battery 10, and holes are made on the connecting pieces. Current test leads 20 and voltage test leads 30 are then fixed in place using screws. The current test lead 20 is mainly used to connect to an external power source to supply power to the battery, or to connect to a load to allow the battery to discharge. An ammeter or other instrument can be installed in the circuit connected to the current test lead 20 to confirm the current in the circuit containing the battery. The voltage test lead 30 is mainly used to connect to a voltmeter or other instrument to detect the voltage change of the battery during charging and discharging, thereby achieving the battery cycle test.

[0033] Reference Figure 1 As shown, this is an equivalent circuit diagram of the battery testing process in related technologies. The line resistance Rs of the terminals of the current test line 20 and the voltage test line 30 will cause a voltage drop in the circuit, which will lead to test errors. Especially in the scenario of multiple cycle performance tests, the accumulation of errors will seriously affect the accuracy of the test results.

[0034] Reference Figure 2As shown, the test connector 100 provided in this embodiment is used for electrical connection with the battery and as a conductor in battery performance testing. The following mainly uses the test connector 100 for cycle performance testing of a cylindrical battery 10 as an example to illustrate the inventive concept of this application. It is understood that the test connector 100 can also be used as a conductor to connect other types of batteries, such as prismatic batteries and blade batteries, to the circuit and participate in battery performance testing; this application does not limit this.

[0035] Specifically, the test connector 100 can be fixed to the battery electrodes by means of welding or other methods. For example, two test connectors 100 can be connected to the positive and negative terminals of the battery respectively to form an electrical connection with the battery. The test connector 100 has a body portion 110, a first connecting portion 120, and a second connecting portion 130.

[0036] The main body 110 is connected between the first connecting part 120 and the second connecting part 130. The first connecting part 120 is used to connect the voltage test line 30 for testing the battery voltage, and the connection method is, for example, welding, threaded connection, snap-fit ​​connection, etc. The second connecting part 130 is used to connect the current test line 20 for testing the battery current, and the connection method is, for example, welding, threaded connection, snap-fit ​​connection, etc.

[0037] The first connecting portion 120 and the second connecting portion 130 are electrically connected to two different parts of the main body 110, so that the voltage test line 30 connected to the first connecting portion 120 and the current test line 20 connected to the second connecting portion 130 can be separated by the main body 110. That is, during testing, the current test line 20 and the voltage test line 30 are respectively installed in different areas of the test connection piece 100, and they do not directly contact each other. The projections of the parts connected to the test connection piece 100 on the surface of the test connection piece 100 do not overlap, which allows the current test line 20 and the voltage test line 30 to be installed on the test connection piece 100 without affecting each other.

[0038] Reference Figure 3 The diagram shown is an equivalent circuit diagram of the ground test connector 100 provided in this application when participating in the cycle performance test of the cylindrical battery 10. The line resistances of the first connection part 120 and the second connection part 130 are respectively connected to different parts of the circuit. When the voltage test line 30 is connected to instruments such as a voltmeter to detect the battery voltage, the line resistance Rs´ of the part where the voltage is being detected decreases, and the voltage drop in the circuit will decrease. The line resistance of the current test line 20 and its terminals has a lower impact on the accuracy of the test results, and the voltage detection result is closer to the actual voltage of the battery.

[0039] In other words, by adopting the above scheme, voltage test line 30 and current test line 20 are respectively installed through the first connecting part 120 and the second connecting part 130. On the one hand, the two types of test lines are independently installed at different parts of the test connection piece 100, which allows for convenient and flexible installation of each test line. On the other hand, the ground voltage test line 30 and the power supply current test line 20 are equivalent to being connected to the circuit where the battery is located at different parts of the test connection piece 100. During measurement, the influence of the resistance of the connection terminal used by the current test line 20 on the measurement result can be reduced, thereby improving the accuracy of the detection.

[0040] Furthermore, since the voltage test line 30 and the current test line 20 are independently set in different parts of the test connection piece 100, after the test connection piece 100 is connected to the circuit, the thermal dynamics generated by the current test line 20 after it is powered on has little impact on the voltage test line 30, and test data can be stably obtained under different temperature environments.

[0041] As a specific solution, at least two of the first connecting part 120, the second connecting part 130, and the main body part 110 can be separately arranged and fixed into a whole by means of welding, threaded connection, snap-fit ​​connection, etc. Alternatively, refer to... Figure 2 As shown, the first connecting part 120 and the second connecting part 130 are integrally formed on two different parts of the main body 110. In this scheme, the first connecting part 120, the second connecting part 130 and the main body 110 can be integrally formed, which reduces the manufacturing cost and enables the test connecting piece 100 to connect the battery to the circuit more stably, ensuring the stability of the electrical connection.

[0042] For the purpose of at least separating the first connecting portion 120 and the second connecting portion 130, refer to Figure 4 and Figure 5 As shown, the test connector 100 is provided with a partition groove 100a, which can penetrate the test connector 100. The partition groove 100a is located between the first connecting portion 120 and the second connecting portion 130, so that the first connecting portion 120 and the second connecting portion 130 are separated by the partition groove 100a. This allows for the separate installation of the voltage test line 30 and the current test line 20, while also allowing for a more concentrated spatial distribution of the first connecting portion 120 and the second connecting portion 130, thus limiting the overall volume of the test connector 100 and facilitating the wiring of the voltage test line 30 and the current test line 20.

[0043] As a specific plan, refer to Figure 2As shown, the test connector 100 also includes a positioning part 140. The positioning part 140 is formed at the body part 110 and is used to position and connect the battery. That is, the battery can be positioned and connected to the body part 110 at the positioning part 140, so that when different batteries are tested, the battery and the test connector 100 can have a definite relative position, which can reduce random errors in the testing process and thus ensure the accuracy of the test results.

[0044] The positioning part 140 and the first connecting part 120 are separated by the body part 110. At the same time, the positioning part 140 and the second connecting part 130 are also separated by the body part 110, so that the battery does not directly contact the voltage test line 30 and the current test line 20 during the test. The spatial distribution of the battery, voltage test line 30 and current test line 20 is more reasonable.

[0045] As a first alternative to the specific structure of the positioning part 140, the positioning part 140 is configured as a positioning protrusion formed on the body part 110, which is used to align with the electrodes of the battery electrically connected to the test connection piece 100. Taking the test connection piece 100 for connecting the cylindrical battery 10 to the circuit as an example, the positioning connection between the test connection piece 100 and the battery can be achieved by using the positioning protrusion to contact the protruding positive electrode of the cylindrical battery 10. The configuration of the positioning part 140 as a positioning protrusion is not shown in the accompanying drawings of this application.

[0046] As a second alternative to the specific structure of the positioning unit 140, refer to Figure 4 As shown, the positioning part 140 is configured as a positioning groove 141 recessed in the body part 110. The positioning groove 141 is used to align with the electrode of the battery electrically connected to the test connector 100. Taking the test connector 100 as an example for connecting the cylindrical battery 10 to the circuit, the positive electrode of the cylindrical battery 10 can be embedded in the positioning groove 141, or the positioning of the welding area can be provided when the body part 110 is welded to the positive electrode of the cylindrical battery 10, thereby achieving the positioning connection between the test connector 100 and the battery.

[0047] As a third alternative to the specific structure of the positioning unit 140, refer to Figure 5As shown, the positioning part 140 is configured as a clearance groove 142 formed at one end of the body part 110. The wall surface of the clearance groove 142 on the body part 110 is used to avoid the protruding terminal of the battery that is electrically connected to the test connector 100. Specifically, the terminal can be the positive terminal of the battery, that is, the protruding positive terminal of the cylindrical battery 10 mentioned above. Depending on the specific structure of the battery being tested, the terminal can also refer to the negative terminal of the battery, which is not limited here. Taking the test connector 100 for connecting the cylindrical battery 10 to the circuit as an example, the test connector 100 can contact the end face of the cylindrical battery 10 in the area near the positioning part 140, and the wall surface of the clearance groove 142 is set as an arc-shaped surface that matches the shape of the positive terminal of the cylindrical battery 10, so that the test connector 100 can avoid the positive terminal of the cylindrical battery 10 at the clearance groove 142, and the shape of the clearance groove 142 realizes the positioning and installation of the test connector 100 and the cylindrical battery 10. This method utilizes the clearance groove 142 to align the test connector 100 with the battery and avoids directly connecting a single test connector 100 to the positive and negative terminals of the battery.

[0048] As an example of a specific solution, refer to Figure 2 , Figure 4 and Figure 5 As shown, when performing performance testing on the cylindrical battery 10, for example, both test connectors 100 can be connected to the end of the cylindrical battery 10 where the positive electrode is formed. Specifically, the test connector 100 with a positioning protrusion or positioning groove 141 is connected to and contacts the positive electrode of the cylindrical battery 10, while the test connector 100 with a clearance groove 142 is connected to and contacts the end face of the cylindrical battery 10, avoiding the positive electrode at the clearance groove 142. Since the end face of the cylindrical battery 10 is generally connected to the negative electrode in related technologies, the test connector 100 with the clearance groove 142 is equivalent to being electrically connected to the negative electrode of the cylindrical battery 10. After connecting the corresponding voltage test line 30 and current test line 20 using the two test connectors 100 respectively, the subsequent battery performance testing can be completed.

[0049] For more specific solutions, refer to Figure 2 As shown, the first connecting part 120 and the second connecting part 130 can be configured to be located on the same side of the positioning part 140, so that the voltage test line 30 and the current test line 20 can be concentrated on the basis of independently installing the voltage test line 30 and the current test line 20, which facilitates the reasonable use of space for wiring around the battery when performing battery performance testing.

[0050] As an example of the specific structure of the test connector 100 connecting the voltage test lead 30 and the current test lead 20, refer to Figure 4 and Figure 5As shown, the first connecting portion 120 has a first test connection hole 121, at which the voltage test lead 30 is fixed, for example, by screw fastening. The second connecting portion 130 has a second test connection hole 131, at which the current test lead 20 is fixed, for example, by screw fastening. The first test connection hole 121 and the second test connection hole 131 are spaced apart to fix the voltage test lead 30 and the current test lead 20 to different parts of the test connection piece 100, avoiding contact between the voltage test lead 30 and the current test lead 20 and thus preventing increased resistance at the tested part.

[0051] In a specific design, the extending directions of the first test connection hole 121 and the second test connection hole 131 can be configured to be the same or inclined to each other. As an example, the first test connection hole 121 and the second test connection hole 131 can be cylindrical, with the center lines of the two cylindrical holes parallel, or the included angle between the center lines of the first test connection hole 121 and the second test connection hole 131 is less than 90°. This allows the portions of the voltage test line 30 and the current test line 20 connected to the test connection piece 100 to have the same or similar extending directions, further facilitating wiring in space.

[0052] In some embodiments, refer to Figure 2 , Figure 4 and Figure 5 As shown, the first connecting portion 120 is provided with a first connecting surface 122. Correspondingly, the second connecting portion 130 is provided with a second connecting surface 132. The first connecting surface 122 is used to limit or abut against the voltage test line 30 connected to the first connecting portion 120, and a first test connection hole 121 passes through the first connecting surface 122. The second connecting surface 132 is used to limit or abut against the current test line 20 connected to the second connecting portion 130, and a second test connection hole 131 passes through the second connecting surface 132.

[0053] The first connecting surface 122 and the second connecting surface 132 are arranged in parallel or coplanar manner, which makes the voltage test line 30 and the current test line 20 have the same or similar mounting reference surfaces. This facilitates the subsequent positioning and installation of the test connection piece 100, the voltage test line 30 and the current test line 20 onto some tooling, and makes it easier to position various test lines during the testing process, thereby reducing the possibility of damage to various test lines.

[0054] In the specific plan, refer to Figure 4 and Figure 5 As shown, the main body 110 has a connecting section 111 and a connecting section 112.

[0055] The connecting segment 111 is used for electrical connection to the battery electrodes, and the aforementioned positioning portion 140 may be formed at the connecting segment 111, for example. The connecting segment 112 protrudes from the surface of the connecting segment 111. The first connecting portion 120 and the second connecting portion 130 are both connected to the connecting segment 112, that is, the first connecting portion 120 and the second connecting portion 130 can protrude from the surface of the connecting segment 111. Thus, by controlling the height of the connecting segment 112 protruding from the connecting segment 111, the first connecting portion 120 and the second connecting portion 130 can be configured to have the same or similar spacing with the body portion 110, thereby achieving a similar purpose as the first connecting surface 122 and the second connecting surface 132 being coplanar, so as to ensure that the voltage test line 30 and the current test line 20 have the same or similar mounting reference surface, which facilitates the installation of various test lines.

[0056] In this application, the test connectors 100 used to connect to the positive and negative terminals of the battery can be made of the same or different materials. The material selection of the test connectors 100 can be flexibly chosen according to the material of the battery itself to facilitate the welding of the test connectors 100 to the battery. As an example, the test connector 100 used to connect to the positive terminal of the battery is made of aluminum, and the test connector 100 used to connect to the negative terminal of the battery is made of copper, for example.

[0057] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A test connector for electrical connection to a battery, characterized in that, The test connector is equipped with: Body part; The first connecting part is used to connect the voltage test line for testing the battery; The second connection part is used to connect the current test line for testing the battery; The first connecting portion and the second connecting portion are electrically connected to two different parts of the main body, such that the voltage test line connected to the first connecting portion and the current test line connected to the second connecting portion can be separated by the main body.

2. The test connector according to claim 1, characterized in that, The test connector also includes: A positioning part is formed in the main body part for positioning the connected battery; The positioning part is separated from the first connecting part by the body part, and the positioning part is separated from the second connecting part by the body part.

3. The test connector according to claim 2, characterized in that, The first connecting part and the second connecting part are located on the same side of the positioning part.

4. The test connector according to claim 2, characterized in that, The positioning portion is configured as a positioning protrusion formed on the body portion, and the positioning protrusion is used to align with the electrode of the battery electrically connected to the test connector. Alternatively, the positioning portion may be configured as a positioning groove recessed in the body portion, the positioning groove being used to align with the electrodes of a battery electrically connected to the test connector.

5. The test connector according to claim 2, characterized in that, The positioning part is configured as a clearance groove formed at one end of the body part, and the wall surface of the body part forming the clearance groove is used to avoid the protruding terminal post of the battery electrically connected to the test connection piece.

6. The test connector according to claim 1, characterized in that, The test connector is provided with a partition groove; The partition groove is located between the first connecting portion and the second connecting portion, so that the first connecting portion and the second connecting portion are separated by the partition groove.

7. The test connector according to claim 1, characterized in that, The first connecting part and the second connecting part are integrally formed on two different parts of the main body.

8. The test connector according to any one of claims 1 to 7, characterized in that, The first connecting portion has a first test connection hole; the second connecting portion has a second test connection hole; the first test connection hole and the second test connection hole are spaced apart.

9. The test connector according to claim 8, characterized in that, The first test connection hole and the second test connection hole extend in the same direction or are inclined to each other.

10. The test connector according to claim 8, characterized in that, The first connecting part is provided with: A first connecting surface is used to limit or abut against the voltage test line connected to the first connecting part, and the first test connection hole passes through the first connecting surface; The second connecting part is provided with: The second connecting surface is used to limit or abut the current test lead connected to the second connecting part, and the second test connection hole passes through the second connecting surface; The first connecting surface and the second connecting surface are arranged parallel or coplanarly.

11. The test connector according to any one of claims 1 to 7, characterized in that, The body portion has: Connecting section, used for electrical connection to the battery electrodes; The connecting section protrudes from the surface of the connecting section; Both the first connecting portion and the second connecting portion are connected to the connecting segment.

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