Front press-fit probe row suitable for 0BB battery test

Abstract

The utility model discloses a front pressing probe row suitable for 0BB battery testing, which solves the problem that a metal wire woven belt on a probe row in the prior art can introduce noise and interference and possibly cause sparks, and comprises a probe substrate and a plurality of probes fixed on the probe substrate, the plurality of probes are perpendicular to the probe substrate, the probes are connected and conducted through flexible metal wires, and the flexible metal wires are in an arc shape bent towards the direction of the probe substrate. According to the utility model, the introduction of noise and interference in the test process is avoided, the risk of causing sparks is also avoided, and the test accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field, specifically provide a kind of suitable for 0BB battery test front pressing probe row. BACKGROUND

[0002] With the rapid growth of photovoltaic industry, solar cell technology has realized the iteration from P type to N type, and 0BB battery is born to obtain the efficiency improvement and cost reduction. In the existing battery technology, 0BB battery design is favored by enterprises for its obvious effect of reducing cost and improving efficiency.

[0003] The existing probe row covers the probe with metal wire braid, for example, a kind of EL test tool for stacked grid battery piece is disclosed in Chinese patent document, its publication number: CN118631173A, avoids the damage of battery grid line caused by probe pressing during testing process, but there is capacitive coupling or electromagnetic induction phenomenon between multiple metal wires in braid during testing process, which can introduce additional noise or interference, and further affect the testing accuracy, and due to the structural design of metal wire braid, the contact stability is low when testing the battery, which may cause arc to cause spark, resulting in the risk of battery damage; At the same time, the probe row does not cover the whole surface of the battery, and the 0BB battery cannot be tested comprehensively. SUMMARY

[0004] In order to solve the problem that the metal wire braid on the probe row in the prior art can introduce noise and interference and may cause spark, the utility model provides a kind of probe row suitable for 0BB battery test front pressing, which is connected with probe by single arc flexible metal wire, avoids the introduction of noise and interference during testing process, also avoids the risk of causing spark, and improves the testing accuracy.

[0005] The specific scheme of the utility model is as follows.

[0006] A kind of probe row suitable for 0BB battery test front pressing, including probe substrate and several probes fixed on the probe substrate, the several probes are vertically arranged with the probe substrate, the probe is connected and conducted through flexible metal wire, and the flexible metal wire is arc-shaped and curved towards the probe substrate.

[0007] The flexible metal wire acts as the main grid line of the battery during the test, can make the fine grid and the probe row have better contact, and then conduct the fine grid line of the battery and collect the current of the battery, thereby improving the test accuracy. By connecting the probes with a single flexible metal wire, the flexibility during battery testing is ensured, and the phenomenon of poor contact and excessive compression causing broken grid during compression is avoided. At the same time, the single flexible metal wire does not have capacitive coupling and electromagnetic induction phenomenon, avoiding the introduction of additional noise and interference, and ensuring the transmission of pure signals. The multi-probe connection design and multi-point pressing ensure the contact reliability of the flexible metal wire and the battery during the test, thereby improving the test accuracy.

[0008] In addition, the flexible metal wire is designed to be arc-shaped and bent towards the probe substrate, which can further improve the contact stability of the flexible metal wire and the battery, avoid local high field strength area caused by sharp edges, prevent arc from causing sparks during testing, and avoid physical damage to the battery sheet caused by the sharp end of the metal wire.

[0009] As a preferred embodiment, the probe substrate is provided with a probe point, which is a through hole or a groove matched with the size of the probe. One end of the probe is fixed at the probe point, and the other end is connected with the flexible metal wire. The flexible metal wire is arranged in parallel with the probe substrate, and the flexible metal wire end of the probe row is pressed against the battery sheet during the test of the 0BB battery. By providing the probe point on the probe substrate, the assembly efficiency of the probe row is improved, and the probe row can be designed flexibly as needed.

[0010] As a preferred embodiment, the probe substrate is provided with a plurality of probe points, and the number of probe points in each row is the same. By arranging the probes in this way, the probe row can measure data at multiple positions of the battery at the same time, obtain more comprehensive battery information, and make the test result more accurate. At the same time, the multiple probe rows can ensure that the force applied to the surface of the battery by each probe is more uniform, reducing the deviation of the test data.

[0011] As a preferred embodiment, the probes in the same row are connected and conducted by the same flexible metal wire, and a plurality of flexible metal wires are arranged side by side and do not contact each other, and there is a certain distance between adjacent metal wires. By this structure design, there is no capacitive coupling and electromagnetic induction phenomenon between the plurality of flexible metal wires, avoiding the introduction of additional noise and interference, ensuring the transmission of pure signals, and thereby improving the test accuracy.

[0012] As a preferred embodiment, the lengths of the plurality of probes are the same, and the connection ends of each probe and the flexible metal wire are located on the same horizontal plane, thereby avoiding damage to the battery sheet or poor contact with the battery sheet during the pressing process due to the fact that a certain probe is more prominent than the other probes.

[0013] As preferred, the several probes are arranged equidistantly according to preset intervals. Different preset intervals can adapt to different testing requirements, and improve the flexibility of the probe array. The equidistant arrangement of the probes ensures uniform pressing of the probe array on the battery sheet, so that the flexible metal wire is in better contact with the battery sheet.

[0014] As preferred, the thickness of the flexible metal wire gradually decreases from the middle to the two ends. This structural design ensures the arc-shaped structure of the flexible metal wire, and better disperses stress when the flexible metal wire is bent or deformed, so that the flexible metal wire has better mechanical adaptability.

[0015] As preferred, the arc height of the flexible metal wire is less than or equal to twice the middle thickness. The arc height of the flexible metal wire is small, so that the two ends cannot contact the surface of the battery or need a larger pressure to contact the surface of the battery.

[0016] As preferred, the overall size of the probe array is greater than the patterning size of the battery sheet, and the outermost probe of the probe array is located on the outside of the battery. By appropriately extending the length of the overall probe array arrangement and increasing the overall size of the probe array, the time for adjustment and repositioning before testing can be reduced, and the battery can be fully tested to improve the testing efficiency in batch testing on a large-scale production line. In addition, the probe array can also adapt to batteries of various sizes, thereby improving the versatility and flexibility.

[0017] As preferred, the probe substrate is made of transparent material, and the probe and the flexible metal wire are connected by welding. The use of transparent material for the probe substrate can reduce the shading effect on the battery during testing, thereby improving the testing accuracy. The welding connection can ensure good electrical contact between the probe and the flexible metal wire, reduce the contact resistance therebetween, thereby providing stable current or signal transmission, and ensure the mechanical stability between the probe and the flexible metal wire, which helps to prevent disconnection or loosening caused by vibration or other mechanical stress.

[0018] Therefore, the utility model has the following beneficial effects:

[0019] (1) The flexible metal wire is used to connect the probe, which ensures the flexibility during battery testing, avoids poor contact and excessive pressing during pressing, prevents disconnection of the grid caused by excessive pressing, and also avoids the introduction of additional noise and interference, thereby ensuring the transmission of pure signals.

[0020] (2) The structural design of the flexible metal wire improves the contact stability between the flexible metal wire and the battery, prevents the generation of electric arc during testing, and prevents the sharp end of the metal wire from causing physical damage to the battery sheet.

[0021] (3) The overall size of the probe array is larger than the patterning size of the test battery sheet, which reduces the positioning time, ensures comprehensive coverage and comprehensive testing of the battery, and improves the testing reliability and flexibility;

[0022] (4) The probe substrate is made of transparent material, which reduces the shading effect on the 0BB battery during the testing process, thereby improving the testing accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by the provided drawings without creative labor for those skilled in the art.

[0024] Figure 1 It is a schematic view of the connection of the probe and the flexible metal wire of the present application.

[0025] Figure 2 It is a side view of the probe array for testing the front surface of the 0BB battery of the present application.

[0026] Figure 3 It is a top view of the probe array for testing the front surface of the 0BB battery of the present application.

[0027] In the figure: 1, probe, 2, flexible metal wire, 3, probe substrate, 4, probe point. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0029] The probe array for testing the front surface of the 0BB battery of the present application is a device used in the testing process of the solar cell, which is used to perform IV testing after contacting and conducting with the battery in the testing process. The 0BB battery refers to a new type of solar cell patterning design without main grid design, which is widely developed and used due to its obvious effect of reducing cost and improving efficiency. The probe array of the present application is suitable for front surface compression testing of 0BB battery.

[0030] The probe array for testing the front surface of the 0BB battery of the present application comprises a probe substrate 3, a probe 1 and a flexible metal wire 2. As shown in the figure, Figure 1The utility model discloses a probe and flexible metal wire's connection schematic drawing is shown. A plurality of probes 1 parallelly placed, through flexible metal wire 2 connection conduction the plurality of probes 1, probe 1 with flexible metal wire 2 vertical setting, flexible metal wire 2 connects in the same end of a plurality of probes 1.

[0031] As Figure 2 The utility model discloses a kind of for 0BB battery test positive side press-fit probe array of view. A plurality of probes 1 one end connects flexible metal wire 2, the other end is fixedly installed on probe substrate 3, probe 1 with probe substrate 3 vertically arranged, flexible metal wire 2 with probe substrate 3 parallel arrangement. When 0BB battery is tested, flexible metal wire end of probe array positive side press-fit battery piece. Figure 2 The length of each probe 1 is same, and the head and tail ends are aligned, and the connecting end of each probe 1 with the flexible metal wire 2 is located on the same horizontal plane, so that the damage to the battery piece during the pressing process is avoided due to the protrusion of a probe compared to the remaining probes, or the poor contact of the flexible metal wire 2 with the battery piece, thereby affecting the test results.

[0032] Probe substrate 3 adopts transparent material, which reduces the shading effect on 0BB battery during testing, thereby improving the testing accuracy. In a preferred embodiment, probe substrate 3 adopts transparent glass material or transparent resin material, so that the light transmittance of probe substrate 3 is high and the hardness is high and not easy to deform, which not only reduces the shading effect on 0BB battery during testing, but also ensures that the probe is uniformly pressed on the surface of the battery during testing, ensuring the contact reliability of the flexible metal wire with the battery.

[0033] Flexible metal wire 2 acts as the main grid line of the battery during testing, which can produce better contact between the fine grid and the probe array, thereby conducting the battery fine grid line and collecting the battery current, improving the testing accuracy. By connecting probe 1 with single flexible metal wire 2, the flexibility during battery testing is ensured, avoiding the contact failure and excessive pressing during the pressing process, which causes the grid breakage phenomenon, and at the same time, single flexible metal wire does not have the phenomenon of capacitive coupling and electromagnetic induction, avoiding the introduction of additional noise and interference, ensuring the transmission of pure signal. Multi-probe connection design, multi-point pressing, ensures the contact reliability of the flexible metal wire with the battery during testing, thereby improving the testing accuracy.

[0034] Figure 2The flexible metal wire 2 in the middle is in an arc shape, is bent towards the direction of the probe, and has the maximum thickness in the middle position and the minimum thickness at the two ends, gradually decreases in thickness from the middle to the two ends, and the ratio of the arc height of the flexible metal wire to the middle thickness is 2:1. Through the structural design of the flexible metal wire 2, the contact stability of the flexible metal wire and the battery can be improved, the local high-field area caused by the sharp edge is avoided, the electric arc in the test process is prevented to cause the spark, and meanwhile, the sharp end of the metal wire is prevented from causing physical damage to the battery sheet. The flexible metal wire 2 can better disperse stress when being bent or deformed, and has better mechanical adaptability. The arc height of the flexible metal wire 2 is small, the two ends cannot contact the surface of the battery or need a larger pressure to contact the surface of the battery, only the pressure within the bearing range of the battery sheet needs to be applied to the probe row, so that the flexible metal wire can be attached to the surface of the battery.

[0035] As shown in Figure 3 It is a top view of a probe row suitable for 0BB battery test front pressing of the utility model. The probe substrate 3 is square-shaped and is provided with a plurality of probe points 4. The probe points 4 are through holes or grooves matched with the size of the probes 1. One end of the probe 1 is fixed at the probe point 4, and the other end is connected with the flexible metal wire 2. The length of the flexible metal wire 2 is greater than the length of the probe substrate 3. The probe points 4 are arranged in n rows and n columns. Through such a probe point arrangement, the probe row can measure the data of multiple positions of the battery at the same time, obtain more comprehensive battery information, and make the test result more accurate. At the same time, the multiple rows of probes can ensure that the force applied to the surface of the battery by each probe is more uniform, reducing the test data deviation. Figure 3 As shown in the middle, the probe points 4 are provided with 16, arranged in four rows and four columns. Four probes 1 in each row are connected with the same flexible metal wire 2. There are four flexible metal wires 2, which are evenly distributed on the probe row. There is a certain distance between any two flexible metal wires 2, avoiding the phenomenon of capacitive coupling and electromagnetic induction between the flexible metal wires 2, thereby avoiding the introduction of additional noise and interference, and ensuring the transmission of pure signals. When testing the 0BB battery, the flexible metal wire end of the probe row is pressed against the battery sheet. By arranging the probe points 4 on the probe substrate 3, the assembly efficiency of the probe row is improved, and the probe row can also be designed flexibly as needed.

[0036] As shown in Figure 3As shown, the probe row is provided with n flexible metal wires 2, the number of flexible metal wires 2 is the same as the number of rows of probes 1, the same flexible metal wire 2 connects the probes 1 in the same row, and the probes 1 in different rows are connected to different flexible metal wires 2. The n flexible metal wires 2 are arranged side by side in parallel, and any two metal wires do not contact each other, and there is a certain distance between adjacent metal wires. Through the structure design, there is no capacitive coupling and electromagnetic induction phenomenon between the n flexible metal wires, which avoids the introduction of additional noise and interference, ensures the transmission of pure signals, and thus improves the accuracy of 0BB battery testing.

[0037] In addition, the length of the overall probe row is appropriately lengthened, the overall length of the probe row is greater than the patterning length of the test battery sheet, the overall size of the probe row is greater than the patterning size of the test battery sheet, and the outermost probe of the probe row is located outside the battery, that is, the outermost probe of the probe row is located outside the effective conductive area of the battery sheet and may contact the packaging material or be suspended. By appropriately lengthening the length of the overall probe row and increasing the overall size of the probe row, the time for adjusting and repositioning the position of the probe row before testing can be reduced, thereby significantly improving the testing efficiency when batch testing on a large-scale production line, while ensuring full coverage of the battery and full testing of the battery, which helps to find any potential problem points and also adapts to batteries of various sizes, improving the versatility and flexibility of the probe row.

[0038] The plurality of probes 1 are fixed on the probe substrate 3 according to a predetermined pitch, in a preferred embodiment, the plurality of probes 1 are arranged at equal intervals, and based on different predetermined pitches, different testing requirements can be met, improving the flexibility of the probe row. The equal interval arrangement of the probes also ensures uniform pressing of the probe row on the battery sheet, so that the flexible metal wire 2 is in better contact with the battery sheet.

[0039] In another preferred embodiment, the flexible metal wire 2 is made of tungsten steel wire, and the outer layer of the tungsten steel wire is plated with silver. The tungsten steel wire can ensure the strength of the flexible metal wire 2, and the outer layer plated with silver improves the contact conductivity of the flexible metal wire 2, which can efficiently transmit the battery current. At the same time, silver has good weldability, and the silver-plated flexible metal wire 2 is easier to weld, ensuring the stability of the connection between the flexible metal wire 2 and the probe 1.

[0040] Based on the operating environment, mechanical strength requirements, and electrical performance requirements of the probe array, a suitable connection method is selected for connecting the probe 1 and the flexible wire 2, ensuring that the connection has good electrical contact and sufficient mechanical stability. The probe 1 and the flexible wire 2 can be connected using conductive adhesive, or mechanically connected using a specialized crimping tool. In a preferred embodiment, the probe 1 and the flexible wire 2 are connected by welding. The welding connection can ensure good electrical contact between the probe 1 and the flexible wire 2, reduce the contact resistance between the two, and thus provide stable current or signal transmission, while ensuring the mechanical stability between the probe 1 and the flexible wire 2, which helps to prevent disconnection or loosening caused by vibration or other mechanical stress.

[0041] When testing 0BB batteries, using a separate flexible wire can avoid signal interference compared to using a flexible wire braid. The multiple wires in the wire braid have capacitive coupling or electromagnetic induction between them, introducing additional noise or interference. Using a separate flexible wire can avoid this situation and ensure purer signal transmission. Using a separate flexible wire can also reduce contact resistance. The separate flexible wire has a smaller diameter and fewer material layers, which helps to reduce the contact resistance between the contact point and the 0BB battery. Lower contact resistance can provide more accurate test results, especially when measuring weak current or voltage. The separate flexible wire can also improve space utilization. Due to its smaller size, a single flexible wire occupies less space, which is particularly important for tightly arranged 0BB battery arrays, allowing the probe to be more accurately positioned at the designated test location without interfering with adjacent components or structures. The cost of a single flexible wire is usually lower than that of a braid, especially in the case of mass production and one-time use, which can reduce overall test costs. In addition, the arc-shaped flexible wire can improve the contact stability of the flexible wire with the battery compared to the braid, avoiding local high-field areas caused by sharp edges, preventing sparks caused by arcs during testing, and avoiding physical damage to the battery sheet by the sharp end of the wire.

[0042] The assembly process of the probe row suitable for 0BB battery test is as follows: firstly, the probes 1 are welded with the flexible metal wires 2 according to a preset interval, then the probes 1 are fixedly installed at the probe points 4 of the probe substrate 3, the probes 1 in the same row are connected with the same flexible metal wire 2, and a certain interval is arranged between any adjacent flexible metal wires 2, and the assembly of the probe row is completed. When the probe row of the utility model is used to test the 0BB battery, the flexible metal wire 2 is pressed and combined on the effective conductive area of the 0BB battery, and acts as the main grid line of the battery, and the conduction of the fine grid line of the battery and the collection of the battery current are realized. In the test process, the probe substrate 3 fully covers the 0BB battery, and since the probe substrate 3 is made of transparent material, the shading effect of the probe row on the 0BB battery is reduced during the test, that is, the influence on the test accuracy is reduced.

[0043] The utility model discloses a kind of probe row suitable for 0BB battery test, which is connected with probe 1 using flexible metal wire 2, ensure flexibility in battery test process, avoid the phenomenon of broken grid caused by contact failure and excessive compression during compression process, while also avoid the introduction of additional noise and interference, ensure the transmission of pure signal;Through the structural design of flexible metal wire, the contact stability of flexible metal wire and battery is improved, to prevent the arc during the test process causes spark, while avoiding the tip of metal wire to cause physical damage to battery sheet;The overall size of probe row is greater than the patterned size of test battery sheet, reduce positioning time, ensure the comprehensive coverage and comprehensive test to battery, improve test reliability and flexibility;Probe substrate 3 is made of transparent material, reduce the shading effect on 0BB battery during the test, and then improve test accuracy.

[0044] The utility model is suitable for the test of 0BB battery, but is not limited to the test of 0BB battery, and can also be applied to more scenes, for example, the test of photovoltaic battery or various batteries without main grid, which can test the defects or damage of battery.

[0045] The above is only the preferred embodiment of the utility model, and does not limit the utility model, and any simple modification, change and equivalent structure change according to the technical essence of the utility model are still within the protection scope of the utility model technical scheme.

Claims

1. A probe card for 0BB battery test face compression probes, comprising: The probe substrate and a plurality of probes fixed on the probe substrate are vertically arranged, and the probes are connected by flexible wires which are curved in the direction of the probe substrate.

2. A probe card for testing a 0BB battery, according to claim 1, wherein, The probe substrate is provided with probe points which are through holes or grooves matching the size of the probes, one end of the probe is fixed on the probe point, and the other end is connected with the flexible wire.

3. A probe card for testing a 0BB battery face compression probe array as defined in claim 2, wherein, The probe substrate is provided with a plurality of rows of probe points, and the number of probe points in each row is the same.

4. A probe card for testing a 0BB battery face compression probe array as defined in claim 3, wherein, The probes in the same row are connected by the same flexible wire, and a plurality of flexible wires are arranged side by side and do not contact each other.

5. A probe card for testing a 0BB battery face compression probe array as defined in claim 2, wherein, The lengths of the plurality of probes are the same, and the connection ends of each probe and the flexible wire are located on the same horizontal plane.

6. A probe card for testing a 0BB battery face compression probe array as defined in claim 5, wherein, The plurality of probes are arranged at equal intervals according to a preset interval.

7. A probe card for testing a 0BB battery, according to claim 1, wherein, The thickness of the flexible wire gradually decreases from the middle to the two ends.

8. A probe card for testing a 0BB battery face compression probe array according to claim 7, wherein, The arc height of the flexible wire is less than or equal to twice the thickness of the middle.

9. The probe card for testing the front press bonding of 0BB battery according to claim 1, wherein, The overall size of the probe row is greater than the patterning size of the test battery piece, and the outermost probe of the probe row is located on the outside of the battery.

10. A probe card for testing a front press of a 0BB battery according to any one of claims 1-9, wherein, The probe substrate is made of transparent material, and the probe and the flexible wire are connected by welding.

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