Battery cell short circuit test tool and battery cell test system

Abstract

The utility model belongs to the technical field of test tools, and particularly relates to a battery cell short circuit test tool and a battery cell test system, and the battery cell short circuit test tool comprises a bearing platform, a pressing plate assembly, a conductive assembly, an isolation assembly and a short circuit test assembly. A battery cell is placed on the bearing table, and the pressing plate assembly drives the conductive assembly to move towards the battery cell until the pressing plate assembly abuts against the battery cell and the conductive assembly makes contact with a positive current collector and a negative current collector on the battery cell; the isolation component is inserted into the battery cell to divide the battery cell into an upper part and a lower part and isolate the upper part and the lower part of the battery cell; the short-circuit test assembly performs short-circuit test on the battery cell through the conductive assembly; according to the utility model, the isolation assembly and the conductive assembly are arranged on the pressing plate assembly and are matched with the short-circuit test assembly, so that a breakdown point with poor insulation in a battery cell can be quickly and accurately positioned, the time for disassembling the battery cell and finding an abnormal breakdown point is saved, the manpower is saved, and meanwhile, the influence on the productivity due to overlong stop time of a production line is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of testing tooling, and in particular relates to a battery cell short-circuit testing tooling and a battery cell testing system. Background Art

[0002] At present, in the manufacturing process of lithium-ion batteries, after the production of the pole pieces is completed, the positive and negative pole pieces and the diaphragm need to be assembled together by winding or stacking to form a bare cell. The bare cell is then subjected to an insulation withstand voltage test to determine whether there are foreign particles inside the bare cell that cause a short circuit. Bare cells with poor insulation tests are placed together for disassembly, and some bare cells with poor insulation are not discovered because the breakdown point is too small. The disassembly results are judged to be unknown, which is not conducive to on-site insulation improvement analysis.

[0003] At present, bare cells with poor insulation need to use a multimeter to test the resistance of each layer of electrodes, but the work efficiency is low, and long-term work will lead to visual fatigue, and the breakdown point is more likely to be ignored. It is impossible to simply and effectively find the breakdown point, which is not conducive to technical personnel to analyze and improve abnormal problem points such as poor insulation on site. At the same time, when a batch of poor insulation occurs on site, the abnormal problem point cannot be quickly identified, which affects production capacity and consumes a lot of human resources.

[0004] Therefore, it is urgent to develop a new battery cell short circuit test tool and battery cell test system to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an X-cell short-circuit test tool and a cell test system.

[0006] In order to solve the above technical problems, the utility model provides a battery cell short-circuit test tool, which includes: a carrier platform, a pressure plate assembly, a conductive assembly, an isolation assembly and a short-circuit test assembly; wherein the pressure plate assembly is movably arranged above the carrier platform, the conductive assembly is installed on the pressure plate assembly, the isolation assembly is movably arranged on one side of the carrier platform, and the short-circuit test assembly is electrically connected to the conductive assembly; the carrier platform is suitable for placing battery cells, and the pressure plate assembly is suitable for driving the conductive assembly to move toward the battery cells until the pressure plate assembly presses the battery cells and the conductive assembly contacts the positive current collector and the negative current collector on the battery cells; the isolation assembly is suitable for inserting the battery cells to divide the battery cells into upper and lower parts, and isolate the upper and lower parts of the battery cells; and the short-circuit test assembly is suitable for performing short-circuit tests on the battery cells through the conductive assembly.

[0007] Specifically, the pressing plate assembly includes: a plurality of pressing plate cylinders and a test pressing plate; the output portion of each pressing plate cylinder is connected to the test pressing plate, and the test pressing plate is arranged toward the bearing platform.

[0008] Specifically, each of the pressure plate cylinders is installed on a platform frame.

[0009] Specifically, the conductive component includes: at least two test metal blocks; the two test metal blocks are installed at the bottom of the test pressure plate, and the two test metal blocks are electrically connected to the short-circuit test component; the test pressure plate is suitable for driving the two test metal blocks to move toward the battery cell so that the two test metal blocks respectively contact the positive current collector and the negative current collector of the battery cell.

[0010] Specifically, the isolation assembly includes: an isolation drive unit and an isolation unit; the isolation drive unit is installed on the carrier platform, and the output part of the isolation drive unit is connected to the isolation unit; the isolation unit is parallel to the table surface of the carrier platform.

[0011] Specifically, the isolation driving unit comprises: a transverse driving member; an output portion of the transverse driving member is connected to the isolation unit.

[0012] Specifically, the isolation drive unit further includes: a longitudinal drive member; an output portion of the longitudinal drive member is connected to the transverse drive member.

[0013] Specifically, the isolation unit includes: a ceramic gasket; the ceramic gasket is installed on the output portion of the transverse driving member, and the ceramic gasket is parallel to the table surface of the supporting platform.

[0014] Specifically, the short-circuit test component includes: a short-circuit tester; a positive electrode connection and a negative electrode connection of the short-circuit tester are connected to a positive copper block and a negative copper block respectively.

[0015] On the other hand, the utility model provides a battery cell testing system, which comprises: a plurality of battery cell short-circuit testing fixtures as described above; wherein each of the battery cell short-circuit testing fixtures is sequentially arranged in a battery cell production line to be used for testing battery cells.

[0016] The beneficial effect of the utility model is that the utility model can quickly and accurately locate the insulation breakdown point of the battery cell by arranging the isolation component and the conductive component on the pressure plate component and cooperating with the short-circuit test component, thereby saving the time of disassembling the battery cell and finding the abnormal breakdown point, saving manpower, and avoiding the impact on production capacity due to excessive production line shutdown time.

[0017] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by implementing the present invention.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural diagram of a battery short-circuit test tool of the utility model.

[0021] In the figure:

[0022] 1. Loading platform;

[0023] 2. Press plate assembly; 21. Press plate cylinder; 22. Test press plate;

[0024] 3. Conductive components; 31. Test metal blocks;

[0025] 4. Isolation assembly; 41. Transverse drive member; 42. Longitudinal drive member; 43. Ceramic gasket;

[0026] 5. Short circuit test assembly; 51. Short circuit tester;

[0027] 6. Battery cells;

[0028] 7. Stand frame. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Embodiment 1, in this embodiment, as Figure 1As shown, this embodiment provides a short-circuit test tool for a battery cell 6, which includes: a carrier platform 1, a pressure plate assembly 2, a conductive assembly 3, an isolation assembly 4 and a short-circuit test assembly 5; wherein the pressure plate assembly 2 is movably arranged above the carrier platform 1, the conductive assembly 3 is installed on the pressure plate assembly 2, the isolation assembly 4 is movably arranged on one side of the carrier platform 1, and the short-circuit test assembly 5 is electrically connected to the conductive assembly 3; the carrier platform 1 is suitable for placing the battery cell 6, and the pressure plate assembly 2 is suitable for driving the conductive assembly 3 to move toward the battery cell 6 until the pressure plate assembly 2 presses the battery cell 6 and the conductive assembly 3 contacts the positive current collector and the negative current collector on the battery cell 6; the isolation assembly 4 is suitable for inserting the battery cell 6 to divide the battery cell 6 into an upper part and a lower part, and isolate the upper part and the lower part of the battery cell 6; and the short-circuit test assembly 5 is suitable for performing a short-circuit test on the battery cell 6 through the conductive assembly 3.

[0031] In this embodiment, by setting an isolation component 4 and a conductive component 3 on the pressure plate component 2 and cooperating with the short-circuit test component 5, this embodiment can quickly and accurately locate the insulation breakdown point of the battery cell 6, saving the time of disassembling the battery cell 6 and finding the abnormal breakdown point, saving manpower, and avoiding the impact on production capacity due to excessive production line shutdown time.

[0032] In order to press the battery cell 6 onto the carrier 1 , the pressure plate assembly 2 includes: a plurality of pressure plate cylinders 21 and a test pressure plate 22 ; the output portion of each pressure plate cylinder 21 is connected to the test pressure plate 22 , and the test pressure plate 22 is arranged toward the carrier 1 .

[0033] Specifically, the platen cylinder 21 can drive the test platen 22 to move in the vertical direction, and the platen cylinder 21 drives the test platen 22 to press down until the test platen 22 abuts against the battery cell 6 , thereby pressing the battery cell 6 onto the carrier 1 .

[0034] In order to facilitate the downward pressing of the test platen 22 , each of the platen cylinders 21 is installed on the bench frame 7 .

[0035] In order to perform a power-on test on the battery cell 6, the conductive component 3 includes: at least two test metal blocks 31; the two test metal blocks 31 are installed at the bottom of the test pressure plate 22, and the two test metal blocks 31 are electrically connected to the short-circuit test component 5; the test pressure plate 22 is suitable for driving the two test metal blocks 31 to move toward the battery cell 6, so that the two test metal blocks 31 contact the positive current collector and the negative current collector of the battery cell 6 respectively.

[0036] Specifically, during the test, the vertical pressure plate cylinder 21 drives the test pressure plate 22 to move in the vertical direction. When the pressure plate cylinder 21 contacts the battery cell 6 on the supporting platform 1, the pressure plate cylinder 21 stops moving; and the two test metal blocks 31 on the test pressure plate 22 contact the positive current collector and the negative current collector on the battery cell 6 respectively.

[0037] As an optional implementation of the test metal block 31, the two test metal blocks 31 are respectively a positive copper block and a negative copper block, which play a role of conductivity.

[0038] In order to separate the battery cell 6 from the inside for short-circuit testing, the isolation assembly 4 includes: an isolation drive unit and an isolation unit; the isolation drive unit is installed on the carrier 1, and the output of the isolation drive unit is connected to the isolation unit; the isolation unit is parallel to the surface of the carrier 1.

[0039] In order to realize the lateral movement of the isolation unit, the isolation driving unit comprises: a lateral driving member 41; the output portion of the lateral driving member 41 is connected to the isolation unit.

[0040] Specifically, the transverse driving member 41 may be a cylinder.

[0041] In order to realize the longitudinal movement of the isolation unit, the isolation drive unit further includes: a longitudinal drive member 42 ; the output portion of the longitudinal drive member 42 is connected to the transverse drive member 41 .

[0042] Specifically, the longitudinal driving member 42 may be a cylinder.

[0043] In order to meet the insulation requirement of the isolation unit, the isolation unit includes: a ceramic gasket 43 ; the ceramic gasket 43 is installed on the output portion of the transverse driving member 41 , and the ceramic gasket 43 is parallel to the table surface of the supporting platform 1 .

[0044] Specifically, the surface of the ceramic gasket 43 is set to be smooth and will not cause destructive damage to the inside of the battery cell 6. The ceramic gasket 43 is inserted into the inside of the main body of the battery cell 6 to divide the battery cell 6 into two parts, the upper and lower parts of the battery cell 6 are isolated by the ceramic gasket 43, and the two are not in contact; the ceramic gasket 43 insulates and separates the battery cell 6, and the battery cell 6 is divided into two from the inside for a short-circuit test. According to the short-circuit test result, the part with unqualified test results is divided into two again for a short-circuit test. The short-circuit test is repeated until the exact position of the breakdown point is found.

[0045] As an optional implementation of the short-circuit test component 5, the short-circuit test component 5 includes: a short-circuit tester 51; the positive electrode wiring and the negative electrode wiring of the short-circuit tester 51 are connected to the positive copper block and the negative copper block respectively.

[0046] Specifically, the downward pressure of the test plate 22 calculates the thickness of the battery cell 6 according to the downward pressure stroke of the plate cylinder 21, and feeds back to the host computer; the host computer controls the ceramic gasket 43 to move to the half of the thickness of the battery cell 6 through the longitudinal drive member 42 and drives the transverse drive member 41 to drive the ceramic gasket 43 to be inserted into the battery cell 6, and starts the short-circuit test at the same time. If there is no abnormality in the short-circuit test, the short-circuit tester sends a test pass signal to the host computer, and the host computer controls the ceramic gasket 43 to move downward to one-quarter of the thickness of the battery cell 6 for testing again, and the test is repeated until the breakdown point is found; the host computer controls the ceramic gasket 43 to move to the half of the thickness of the battery cell 6 and inserts it into the battery cell 6, and starts the short-circuit test at the same time. If the short-circuit test is abnormal, the short-circuit tester 51 sends a test failure signal to the host computer, and the host computer controls the ceramic gasket 43 to move upward to one-quarter of the thickness of the battery cell 6 for testing again, and the test is repeated until the breakdown point is found.

[0047] Embodiment 2, based on embodiment 1, this embodiment provides a battery cell 6 testing system, which includes: a number of battery cell 6 short-circuit testing fixtures as provided in embodiment 1; wherein each of the battery cell 6 short-circuit testing fixtures is sequentially arranged in the battery cell 6 production line for testing the battery cell 6.

[0048] In summary, the utility model can quickly and accurately locate the insulation breakdown point of the battery cell by arranging the isolation component and the conductive component on the pressure plate component and cooperating with the short-circuit test component, thereby saving the time of disassembling the battery cell and finding the abnormal breakdown point, saving manpower, and avoiding the impact on production capacity due to long production line shutdown time.

[0049] All devices (parts without specific structure) selected in this application are universal standard parts or parts known to those skilled in the art, and their structures and principles can be known by those skilled in the art through technical manuals or conventional experimental methods. In addition, the software programs involved in this application are all prior art, and this application does not involve any improvement to the software programs.

[0050] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0052] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0053] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0054] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0055] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A battery short circuit test tool, characterized in that: include: Loading platform, pressure plate assembly, conductive assembly, isolation assembly and short circuit test assembly; in The pressure plate assembly is movably arranged above the bearing platform, the conductive assembly is mounted on the pressure plate assembly, the isolation assembly is movably arranged on one side of the bearing platform, and the short-circuit test assembly is electrically connected to the conductive assembly; The carrier is suitable for placing a battery cell, and the pressure plate assembly is suitable for driving the conductive assembly to move toward the battery cell until the pressure plate assembly presses the battery cell and the conductive assembly contacts the positive current collector and the negative current collector on the battery cell; The isolation assembly is suitable for being inserted into the battery core to divide the battery core into an upper part and a lower part, and isolating the upper part from the lower part of the battery core; and The short-circuit test component is suitable for performing a short-circuit test on a battery cell through a conductive component.

2. The battery short circuit test tool as claimed in claim 1, characterized in that: The pressing plate assembly comprises: a plurality of pressing plate cylinders and a test pressing plate; The output portion of each of the pressure plate cylinders is connected to a test pressure plate, and the test pressure plate is arranged toward the bearing platform.

3. The battery short circuit test tool as claimed in claim 2, characterized in that: Each of the pressing plate cylinders is installed on the platform frame.

4. The battery short circuit test tool as claimed in claim 2, characterized in that: The conductive assembly includes: at least two test metal blocks; The two test metal blocks are installed at the bottom of the test pressure plate, and the two test metal blocks are electrically connected to the short-circuit test assembly; The test pressing plate is suitable for driving the two test metal blocks to move toward the battery cell, so that the two test metal blocks contact the positive current collector and the negative current collector of the battery cell respectively.

5. The battery short circuit test tool as claimed in claim 1, characterized in that: The isolation component comprises: an isolation driving unit and an isolation unit; The isolation driving unit is mounted on the carrier platform, and the output portion of the isolation driving unit is connected to the isolation unit; The isolation unit is parallel to the table surface of the carrying table.

6. The battery short circuit test fixture as claimed in claim 5, characterized in that: The isolation drive unit comprises: a lateral drive member; The output portion of the transverse driving member is connected to the isolation unit.

7. The battery short circuit test fixture as claimed in claim 6, characterized in that: The isolation drive unit further comprises: a longitudinal drive member; The output portion of the longitudinal driving member is connected to the transverse driving member.

8. The battery short circuit test fixture as claimed in claim 6, characterized in that: The isolation unit includes: a ceramic gasket; The ceramic gasket is installed on the output portion of the transverse driving member, and the ceramic gasket is parallel to the table surface of the supporting platform.

9. The battery short circuit test tool as claimed in claim 4, characterized in that: The short circuit test assembly comprises: a short circuit tester; The positive electrode connection and the negative electrode connection of the short circuit tester are connected to the positive electrode copper block and the negative electrode copper block respectively.

10. A battery cell testing system, characterized in that: include: Several battery short circuit test tools as described in any one of claims 1 to 9; in Each of the battery cell short circuit test fixtures is arranged in sequence in the battery cell production line to be used for testing the battery cells.

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