An auxiliary tool for battery performance test

Abstract

The utility model provides a kind of for battery performance test's auxiliary tool, it is related to battery test technical field, the auxiliary tool includes: base, multiple connecting points are arranged on base;Two electric connectors, one end of two electric connectors is respectively used to with the two test ends of test equipment detachable connection, each electric connector can be detachably connected with at least one connecting point;Two electric connectors are oppositely arranged on base, the other end of two electric connectors is respectively used to with the two pole posts of two side pole post electric core contact, or two electric connectors are same side arranged on base, the other end of two electric connectors is respectively used to with the two pole posts of same side pole post electric core contact;Limiting piece, limiting piece can be detachably connected with at least one connecting point;Using the auxiliary tool, reduce the preparation procedure of one before battery cell test pad welding, greatly improve the speed of battery cell research and development, also avoid the influence of virtual welding on battery cell performance when pad welding.

Description

Technical Field

[0001] This utility model belongs to the field of battery testing technology, and more specifically, relates to an auxiliary tooling for battery performance testing. Background Technology

[0002] Before performance testing after capacity grading, prismatic battery cells need to undergo tab welding on their terminals to connect the terminals of the cell to the test equipment. This method not only slows down the cell testing process, but also often results in incomplete soldering during tab welding, affecting the cell's electrical performance. Finally, the cells with tabs welded cannot be reused and must be scrapped. To solve this problem, an auxiliary tooling specifically designed for the electrical performance testing of prismatic battery cells has been developed.

[0003] Currently, in battery cell R&D projects, electrical performance testing is required at every stage and even for each experiment. Each stage of testing ranges from electrical performance to safety testing, using dozens or even hundreds of batteries. By the end of the entire project development process, there will be hundreds of battery cells. However, cells that have been soldered with wafers are often unsuitable for module assembly. If the battery cells undergoing performance testing were not soldered with wafers, many cells could be downgraded or used for other purposes after a short period of testing. This would reduce resource waste and improve the utilization rate of battery cells. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an auxiliary tooling for battery performance testing. This addresses the problem mentioned in the background art that, before performance testing, battery cells require the welding of tabs onto the terminals of the cell for connection to the testing equipment. This method not only slows down the cell testing process but also frequently results in incomplete soldering, affecting the cell's electrical performance. Furthermore, the cells with welded tabs cannot be reused and must be scrapped.

[0005] To achieve the above objectives, this utility model provides an auxiliary fixture for battery performance testing, the auxiliary fixture comprising:

[0006] A base having multiple connection points arranged on it;

[0007] Two electrical connectors, one end of each of the two electrical connectors being detachably connected to two test terminals of the test equipment, and each of the electrical connectors being detachably connected to at least one of the connection points;

[0008] Two electrical connectors are disposed opposite to each other on the base, and the other ends of the two electrical connectors are respectively used to contact the two terminals of the two side terminals of the battery cell; or the two electrical connectors are disposed on the same side on the base, and the other ends of the two electrical connectors are respectively used to contact the two terminals of the battery cell on the same side.

[0009] A limiting member is provided, which can be detachably connected to at least one of the connection points. When two electrical connectors are arranged on the same side, the limiting member is arranged opposite to the two electrical connectors. The limiting member is used to abut against the end of the same-side electrode cell away from the electrode.

[0010] Preferably, the electrical connector comprises:

[0011] cylindrical body;

[0012] A connecting piece, which is one end of the electrical connector and is connected to one end of the cylinder;

[0013] A spring is disposed inside the cylinder, with one end of the spring passing through the other end of the cylinder.

[0014] A contact probe, which is the other end of the electrical connector, is sleeved inside the spring, and the contact head of the contact probe is fitted and connected to one end of the spring.

[0015] An electrical connection wire is disposed inside the cylinder, and its two ends are respectively connected to the connecting piece and the contact probe.

[0016] Preferably, the base is provided with a connection hole at each of the connection points.

[0017] Preferably, the auxiliary tooling for battery performance testing further includes two brackets, with the two electrical connectors respectively connected to the two brackets. Each bracket has two first mounting holes, and each first mounting hole is connected to a connection hole via a first locking member.

[0018] Preferably, the first locking member includes a first bolt and a first nut, wherein the first bolt passes through the first mounting hole and the connecting hole in sequence and is threadedly connected to the first nut.

[0019] Preferably, the limiting member is provided with two second mounting holes, and each second mounting hole is connected to one of the connecting holes through a second locking member.

[0020] Preferably, the second locking member includes a second bolt and a second nut, wherein the second bolt passes through the second mounting hole and the connecting hole in sequence and is threadedly connected to the second nut.

[0021] Preferably, the connecting piece is provided with a fixing hole, which is used for bolt connection with the test end of the testing equipment.

[0022] Preferably, the contact head of the contact probe is provided with multiple anti-slip protrusions.

[0023] Preferably, the bracket is L-shaped.

[0024] This utility model provides an auxiliary fixture for battery performance testing. Its advantages are as follows: The base of the auxiliary fixture has multiple connection points arranged on it. Each electrical connector can be detachably connected to at least one connection point. When the testing equipment tests the battery cell, one end of two electrical connectors is connected to the two test ends of the testing equipment, and the two electrical connectors are positioned opposite each other on the base. The other ends of the two electrical connectors are respectively attached to the two terminals of the battery cells on both sides, or the two electrical connectors are positioned on the same side of the base, and the other ends of the two electrical connectors are respectively attached to the two terminals of the battery cells on the same side. When the two electrical connectors are positioned on the same side, a limiting component is used to limit the battery cells on the same side. Using this auxiliary fixture reduces the preparatory step of foil welding before battery cell testing, greatly improving the speed of battery cell development. It also avoids the impact of poor soldering during foil welding on battery cell performance, such as abnormal temperature rise alarms caused by increased internal resistance. It reduces the purchase of foil materials, lowers costs, and allows tested battery cells to be recycled, reducing resource waste and improving battery cell utilization.

[0025] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0026] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0027] Figure 1 A three-dimensional structural schematic diagram of an auxiliary tooling for battery performance testing according to an embodiment of the present invention is shown.

[0028] Figure 2 A three-dimensional structural diagram of the base of an auxiliary tooling for battery performance testing according to an embodiment of the present invention is shown.

[0029] Figure 3 A schematic diagram of the electrical connection structure of an auxiliary tooling for battery performance testing according to an embodiment of the present invention is shown.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Base; 2. Electrical connector; 21. Cylinder; 22. Connecting piece; 23. Spring; 24. Contact probe; 25. Electrical connection wire; 3. Battery cell; 4. Limiting component; 5. Connecting hole; 6. Bracket. Detailed Implementation

[0032] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0033] This utility model provides an auxiliary fixture for battery performance testing, the auxiliary fixture comprising:

[0034] Base 1, with multiple connection points arranged on base 1;

[0035] Two electrical connectors 2, one end of each electrical connector 2 is used to be detachably connected to two test terminals of the test equipment, and each electrical connector 2 can be detachably connected to at least one connection point;

[0036] Two electrical connectors 2 are disposed opposite to each other on the base 1. The other ends of the two electrical connectors 2 are respectively used to contact the two poles of the two pole cells 3 on both sides. Alternatively, the two electrical connectors 2 are disposed on the same side on the base 1. The other ends of the two electrical connectors 2 are respectively used to contact the two poles of the pole cells 3 on the same side.

[0037] The limiting member 4 can be detachably connected to at least one connection point. When two electrical connectors 2 are arranged on the same side, the limiting member 4 is arranged opposite to the two electrical connectors 2. The limiting member 4 is used to abut against the end of the same-side electrode cell 3 away from the electrode.

[0038] Specifically, to address the current issue that before performance testing of battery cells, it is necessary to weld tabs onto the terminals of the battery cells for connection to the testing equipment, which not only delays the testing process but also frequently results in incomplete soldering, affecting the electrical performance of the battery cells, and the cells after tab welding cannot be reused and must be scrapped, this invention provides an auxiliary fixture for battery performance testing. A battery cell 3 with two terminals on both sides has two terminals distributed on both sides, while a battery cell 3 with terminals on the same side has two terminals distributed on one side. The two terminals of the battery cell 3 are the positive terminal and the negative terminal. The base 1 of this auxiliary fixture has multiple connection points, and each electrical connector 2 can be detachably connected to at least one connection point. When the testing equipment tests the battery cell 3, one end of each of the two electrical connectors 2 is connected to one of the two terminals of the testing equipment. The test terminals are connected, with two electrical connectors 2 positioned opposite each other on the base 1. The other ends of the two electrical connectors 2 are in direct contact with the two terminals of the two side terminals of the battery cell 3, respectively. Alternatively, the two electrical connectors 2 can be positioned on the same side of the base 1, with the other ends of the two electrical connectors 2 in direct contact with the two terminals of the same side terminal battery cell 3. When the two electrical connectors 2 are positioned on the same side, the limiting component 4 is used to limit the position of the same side terminal battery cell 3. This auxiliary tooling reduces the preparatory step of foil welding before battery cell 3 testing, greatly improving the speed of battery cell 3 development. It also avoids the impact of poor soldering during foil welding on the performance of battery cell 3, such as abnormal temperature rise alarms caused by increased internal resistance. This reduces the purchase of foil materials, lowers costs, and allows the tested battery cell 3 to be recycled, reducing resource waste and improving battery cell utilization.

[0039] Preferably, the electrical connector 2 includes:

[0040] Cylinder 21;

[0041] Connecting piece 22, which is one end of electrical connector 2, is connected to one end of cylinder 21;

[0042] Spring 23 is installed inside cylinder 21, with one end of spring 23 passing through the other end of cylinder 21;

[0043] Contact probe 24 is the other end of electrical connector 2. Contact probe 24 is sleeved inside spring 23, and the contact head of contact probe 24 is in contact with one end of spring 23.

[0044] Electrical connection wire 25 is disposed inside the cylinder 21, and its two ends are connected to the connecting piece 22 and the contact probe 24, respectively.

[0045] Specifically, the connecting piece 22 is provided with fixing holes, which can be used for different types of testing equipment, such as bolt connection, clamp connection, etc., and has strong versatility; the contact probe 24 is designed with a spring 23, and the elasticity of the spring 23 can better enable the contact probe 24 to make contact with the electrode post of the battery cell 3.

[0046] Preferably, a connection hole 5 is provided on the base 1 at each connection point.

[0047] Specifically, the connection hole 5 is used to realize the detachable connection between the electrical connector 2 and the connection point, or the detachable connection between the limiting member 4 and the connection point. The design of multiple connection holes 5 can be applied to different cell sizes 3, and it is applicable not only to cells 3 with the same side pole, but also to cells 3 with poles on both sides, making the application more flexible and more compatible.

[0048] Preferably, the auxiliary tooling for battery performance testing further includes two brackets 6, two electrical connectors 2 are respectively connected to the two brackets 6, and the brackets 6 are provided with two first mounting holes, each first mounting hole being connected to a connection hole through a first locking member.

[0049] Specifically, the support 6 is L-shaped and is made of a plate of a certain thickness. The vertical plate of the L-shaped support 6 is provided with assembly holes. The cylinder 21 passes through the assembly holes and is connected to the assembly holes. The flat plate of the L-shaped support 6 is provided with a first mounting hole.

[0050] Preferably, the first locking element includes a first bolt and a first nut, wherein the first bolt passes through the first mounting hole and the connecting hole in sequence and is threadedly connected to the first nut.

[0051] Specifically, the bracket 6 can be connected to the base 1 by the first bolt and the first nut.

[0052] Preferably, the limiting member 4 is provided with two second mounting holes, and each second mounting hole is connected to a connecting hole through a second locking member.

[0053] Specifically, the limiting component 4 is a limiting block. The limiting component 4 can be adjusted according to the size of the test cell 3 and can be fixed with the second locking component. The operation is simple.

[0054] Preferably, the second locking element includes a second bolt and a second nut, wherein the second bolt passes through the second mounting hole and the connecting hole in sequence and is threadedly connected to the second nut.

[0055] Specifically, the limiting component 4 can be connected to the base by the second bolt and the second nut.

[0056] Preferably, the contact head of the contact probe 24 is provided with multiple anti-slip protrusions.

[0057] Specifically, the anti-slip protrusions prevent the contact probe 24 from shifting.

[0058] In summary, when the auxiliary tooling for battery performance testing of this application is implemented, the design of multiple connection holes 5 on the base 1 can be adapted to different cell sizes 3, and it is applicable not only to cells 3 with terminals on the same side, but also to cells 3 with terminals on both sides. This design offers greater flexibility and compatibility. When the testing equipment tests the cell 3, one end of each of the two electrical connectors 2 is connected to one of the two test terminals of the testing equipment. The two electrical connectors 2 are positioned opposite each other on the base 1, and the other ends of each electrical connector 2 directly abut against the two terminals of the cells 3 on both sides, or the two electrical connectors 2 are positioned on the same side of the base 1. The other ends of the two electrical connectors 2 are in direct contact with the two terminals of the same-side electrode cell 3. When the two electrical connectors 2 are set on the same side, the limiting member 4 is used to limit the same-side electrode cell 3. Using this auxiliary tooling, a preparatory step of welding the electrode before testing the cell 3 is reduced, which greatly improves the speed of cell 3 development. At the same time, it avoids the impact of poor welding during electrode welding on the performance of the cell 3, such as abnormal temperature rise alarm caused by increased internal resistance. It also reduces the purchase of electrode materials and lowers costs. At the same time, the tested cell 3 can be recycled, reducing resource waste and improving the utilization rate of the cell 3.

[0059] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An auxiliary tooling for battery performance testing, characterized in that, The auxiliary tooling includes: A base having multiple connection points arranged on it; Two electrical connectors, one end of each of the two electrical connectors being detachably connected to two test terminals of the test equipment, and each of the electrical connectors being detachably connected to at least one of the connection points; Two electrical connectors are disposed opposite to each other on the base, and the other ends of the two electrical connectors are respectively used to contact the two terminals of the two side terminals of the battery cell; or the two electrical connectors are disposed on the same side on the base, and the other ends of the two electrical connectors are respectively used to contact the two terminals of the battery cell on the same side. A limiting member is provided, which can be detachably connected to at least one of the connection points. When two electrical connectors are arranged on the same side, the limiting member is arranged opposite to the two electrical connectors. The limiting member is used to abut against the end of the same-side electrode cell away from the electrode.

2. The auxiliary tooling for battery performance testing according to claim 1, characterized in that, The electrical connector includes: cylindrical body; A connecting piece, which is one end of the electrical connector and is connected to one end of the cylinder; A spring is disposed inside the cylinder, with one end of the spring passing through the other end of the cylinder. A contact probe, which is the other end of the electrical connector, is sleeved inside the spring, and the contact head of the contact probe is in contact with one end of the spring. An electrical connection wire is disposed inside the cylinder, and its two ends are respectively connected to the connecting piece and the contact probe.

3. The auxiliary tooling for battery performance testing according to claim 1, characterized in that, The base is provided with connection holes at each of the connection points.

4. The auxiliary tooling for battery performance testing according to claim 3, characterized in that, The auxiliary tooling for battery performance testing also includes two brackets, and the two electrical connectors are respectively connected to the two brackets. The brackets are provided with two first mounting holes, and each first mounting hole is connected to a connection hole through a first locking member.

5. The auxiliary tooling for battery performance testing according to claim 4, characterized in that, The first locking element includes a first bolt and a first nut, wherein the first bolt passes through the first mounting hole and the connecting hole in sequence and is threadedly connected to the first nut.

6. The auxiliary tooling for battery performance testing according to claim 3, characterized in that, The limiting member is provided with two second mounting holes, and each second mounting hole is connected to one of the connecting holes through a second locking member.

7. The auxiliary tooling for battery performance testing according to claim 6, characterized in that, The second locking element includes a second bolt and a second nut, wherein the second bolt passes through the second mounting hole and the connecting hole in sequence and is threadedly connected to the second nut.

8. The auxiliary tooling for battery performance testing according to claim 2, characterized in that, The connecting piece is provided with a fixing hole, which is used for bolt connection with the test end of the testing equipment.

9. An auxiliary tooling for battery performance testing according to claim 2, characterized in that, The contact head of the contact probe is provided with multiple anti-slip protrusions.

10. An auxiliary tooling for battery performance testing according to claim 4, characterized in that, The bracket is L-shaped.

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