A kind of deviation correction test mechanism

Abstract

The utility model discloses a kind of deviation correction test mechanism, it includes including bottom plate, deviation correction unit being set on the bottom plate, support frame being driven to move in XYR direction by the deviation correction unit, first test module and second test module being set on the support frame;The deviation correction unit includes X direction deviation correction module, first support plate being driven to move along X direction by the X direction deviation correction module, Y direction deviation correction module being set on the first support plate, second support plate being driven to move along Y direction by the Y direction deviation correction module and R direction deviation correction module being set on the second support plate.The utility model is through multiple degree-of-freedom precision motion control, innovative composite transmission and rotation design, full closed loop feedback system and the protective test scheme of point surface combination, comprehensive realization is to battery piece and the high efficiency, high accuracy, high yield, high reliability of high-precision device Automation test.

Description

Technical Field

[0001] This utility model belongs to the field of battery cell testing technology, and in particular relates to a correction testing mechanism. Background Technology

[0002] Photovoltaic conversion efficiency testing refers to the measurement of the conversion efficiency of solar cells. Under the premise of a fixed solar cell area and light intensity, the current-voltage output of the solar cell is analyzed to help classify solar cells into performance ranges. Only when the performance of solar cells is similar can the photovoltaic module with the optimal conversion efficiency be obtained. A half-cell is manufactured as a single large panel and then cut into two individual solar cells. Testing each half-cell individually is inefficient; simultaneous testing of both half-cells is much more efficient. Before testing, the cells are placed on a rotating platform. The platform rotates the cells to different stations, and camera images are used for inspection. It was found that the cells shift position during rotation. Because the test contact points and test probes are very small, this shift causes the test probes to not precisely align with the cell's contact points, affecting test accuracy. Therefore, a correction mechanism is needed to fine-tune the position of the test probes based on the shifted cell position, ensuring precise alignment between the probes and the cell's contact points and guaranteeing the accuracy of the cell test.

[0003] In the prior art, the Chinese invention patent authorization announcement CN119176375B discloses a high-precision battery cell IV testing equipment and testing method, which mentions an XYR fine-tuning module. The second driving component, the first support plate, the XYR fine-tuning module, and the test module together constitute a test correction module. However, the specific structure of the XYR fine-tuning module is not disclosed, and the accuracy of the fine-tuning cannot be determined.

[0004] Therefore, it is necessary to provide a correction testing mechanism to solve the above-mentioned technical problems. Utility Model Content

[0005] The main purpose of this utility model is to provide a correction test mechanism that comprehensively realizes high-efficiency, high-precision, high-yield, and high-reliability automated testing of precision components such as battery cells through multi-degree-of-freedom precision motion control, innovative composite transmission and rotation design, a fully closed-loop feedback system, and a point-to-surface combined protective test scheme.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: a deviation correction testing mechanism, comprising a base plate, a deviation correction unit disposed on the base plate, a support frame driven by the deviation correction unit to move in the XYR directions, a first test module and a second test module disposed on the support frame, wherein the first test module and the second test module are disposed vertically opposite each other and jointly complete the testing of the battery cell; the deviation correction unit comprises an X-axis deviation correction module, a first support plate driven by the X-axis deviation correction module to move in the X direction, a Y-axis deviation correction module disposed on the first support plate, a second support plate driven by the Y-axis deviation correction module to move in the Y direction, and an R-axis deviation correction module disposed on the second support plate.

[0007] Furthermore, the R-axis correction module includes a first motor mounted on the second support plate, a first slide table driven by the first motor to move along the Y direction, a first transmission unit connected between the first slide table and the support frame, and a second transmission unit connected between the second support plate and the support frame. The second transmission unit is located on the side close to the first test module. The second support plate is provided with an arc-shaped slide rail extending along the Y direction. The arc-shaped slide rail is located between the first transmission unit and the second transmission unit. The support frame is slidably mounted on the arc-shaped slide rail by a first slider.

[0008] Furthermore, the first transmission unit includes a first support block mounted on the support frame and a first connecting block slidably disposed on the first support block along the X direction. The first connecting block is rotatably connected to the first slide table via a first rotating assembly. The first support block is provided with a first slide rail extending along the X direction, and the first connecting block is slidably disposed on the first slide rail via a second slider.

[0009] Furthermore, the second transmission unit includes a second slide rail disposed on the second support plate and extending in the X direction, a third slider slidably disposed on the second slide rail, a second support block disposed on the third slider, a third slide rail disposed on the second support block and extending in the Y direction, a fourth slider slidably disposed on the third slide rail, and a second connecting block disposed on the fourth slider. The support frame is rotatably connected to the second connecting block via a second rotating assembly.

[0010] Furthermore, the X-axis correction module includes a second motor mounted on the base plate and a second slide table driven by the second motor to move along the X direction. The second slide table is fixed to the bottom of the first support plate. The base plate is provided with a plurality of fourth slide rails, and the first support plate is slidably mounted on the fourth slide rails via a fifth slider. The Y-axis correction module includes a third motor mounted on the first support plate and a third slide table driven by the third motor to move along the Y direction. The third slide table is fixed to the bottom of the second support plate. The first support plate is provided with a plurality of fifth slide rails, and the first support plate is slidably mounted on the fifth slide rails via a sixth slider.

[0011] Furthermore, the base plate is provided with a plurality of first sensors, and the second slide is provided with a first sensing plate for detection by the first sensors; the first support plate is provided with a plurality of second sensors, and the third slide is provided with a second sensing plate for detection by the second sensors; the second support plate is provided with a plurality of third sensors, and the first slide is provided with a third sensing plate for detection by the third sensors.

[0012] Furthermore, the first test module includes a first Z-axis drive unit disposed on the upper end of the support frame, a first lifting frame driven by the first Z-axis drive unit to move up and down, and a first test unit disposed on the first lifting frame; the second test module includes a second Z-axis drive unit disposed on the lower end of the support frame, a second lifting frame driven by the second Z-axis drive unit to move up and down, and a second test unit disposed on the second lifting frame.

[0013] Furthermore, a temperature sensor for detecting the product temperature is installed on either the first or the second lifting frame.

[0014] Furthermore, the first test unit includes a plurality of first test brackets arranged at the bottom of the first lifting frame, and each first test bracket has a first test element detachably disposed at its bottom; The second test unit includes a plurality of second test brackets arranged on the top of the second lifting frame, and a second test element is detachably provided on the top of each second test bracket; The first test element and the second test element are arranged vertically opposite each other.

[0015] Furthermore, the first test element is a metal sheet or a probe set, and the second test element is a probe set or a metal sheet.

[0016] Compared with the prior art, the beneficial effects of the correction testing mechanism of this utility model are as follows: (1) Overall three-layer correction structure: The correction unit is composed of three modules connected in series in the X, Y and R directions, which drive the support frame and test module to move. It realizes high-precision, full-degree-of-freedom correction and positioning of the test module in the plane (X, Y) and rotation (R) directions, which can fully compensate for the position deviation of the battery cell and greatly improve the test accuracy and the applicability of the mechanism. (2) Innovative design of R-axis correction module: The first motor drives the first slide, which, together with the first transmission unit, the second transmission unit and the arc-shaped slide rail, realizes the rotational motion. The first transmission unit can convert the linear motion of the first slide in the Y direction into the rotational motion of the support frame, realizing the precise conversion from linear motion to rotational motion. The structure is compact and the transmission efficiency is high. The second transmission unit can provide bidirectional floating compensation in X and Y directions, eliminating the interference and jamming risks that may be caused by rotational motion, and ensuring the stability and smoothness of the rotation center. (3) Full closed-loop sensor system: Sensors and sensing plates are set on the X-axis correction module, Y-axis correction module and R-axis correction module to detect position. The actual position in each direction can be fed back in real time, forming closed-loop control, which greatly improves the positioning accuracy, repeatability and motion reliability of the system, and avoids the cumulative error of the open-loop system. The correction testing mechanism provided in this solution comprehensively realizes high-efficiency, high-precision, high-yield, and high-reliability automated testing of precision components such as battery cells through multi-degree-of-freedom precision motion control, innovative composite transmission and rotation design, a fully closed-loop feedback system, and a point-to-surface combined protective testing scheme. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the correction test mechanism according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of two correction units on the base plate in an embodiment of this utility model; Figure 3 This is a schematic diagram of the structure of the correction unit in an embodiment of the present invention; Figure 4 This is a schematic diagram of the R-direction correction module and support frame in an embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the R-direction correction module according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the first test unit and the second test unit in this embodiment of the present invention when testing battery cells; The numbers in the diagram represent: 100 - Correction testing organization; 200 - Battery cell; 1-Base plate; 2-X-direction correction module, 21-second motor, 22-second slide table, 23-fourth slide rail, 24-fifth slider, 25-first sensor, 26-first sensing plate; 3-First support plate; 4-Y-axis correction module, 41-third motor, 42-third slide table, 43-fifth slide rail, 44-sixth slider, 45-second sensor, 46-second sensing plate; 5-Second support plate; 6-R-direction correction module, 61-first motor, 62-first slide table, 63-first transmission unit, 631-first support block, 632-first connecting block, 633-first rotating assembly, 634-first slide rail, 635-second slider, 64-second transmission unit, 641-second slide rail, 642-third slider, 643-second support block, 644-third slide rail, 645-fourth slider, 646-second connecting block, 647-second rotating assembly, 65-arc slide rail, 651-limiting post, 66-first slider, 67-third sensor, 68-third sensing plate; 7-Support bracket, 71-Mounting hole, 72-Shielding cover; 8-First test module, 81-First Z-axis drive unit, 82-First lifting frame, 83-First test unit, 831-First test bracket, 832-First test element; 9-Second test module, 91-Second Z-axis drive unit, 92-Second lifting frame, 93-Second test unit, 931-Second test bracket, 932-Second test element, 94-Temperature sensor; 10 - Correction Unit. Detailed Implementation

[0018] Please refer to Figures 1-6This embodiment is a correction test mechanism 100, which includes a base plate 1, a correction unit 10 disposed on the base plate 1, a support frame 7 driven by the correction unit 10 to move in the XYR directions, a first test module 8 and a second test module 9 disposed on the support frame 7. The first test module 8 and the second test module 9 are arranged vertically opposite each other and jointly complete the test of the battery cell 200. The correction unit 10 includes an X-direction correction module 2, a first support plate 3 driven by the X-direction correction module 2 to move in the X direction, a Y-direction correction module 4 disposed on the first support plate 3, a second support plate 5 driven by the Y-direction correction module 4 to move in the Y direction, and an R-direction correction module 6 disposed on the second support plate 5. The correction unit 10 adopts a three-layer structure (X-axis correction module 2, Y-axis correction module 4, and R-axis correction module 6), which respectively drive the support frame 7 to perform lateral, longitudinal, and rotational movements, realizing the precise positioning of the solar cell 200 in three-dimensional space. In particular, the R-axis rotation correction capability can cope with the deviation of the solar cell placement angle, improving the accuracy and applicability of testing.

[0019] In this embodiment, it is used to test the battery cell 200; in other embodiments, it can be used to test other products.

[0020] The X-axis correction module 2 includes a second motor 21 mounted on a base plate 1 and a second slide 22 driven by the second motor 21 to move along the X-direction. The second slide 22 is fixed to the bottom of the first support plate 3. Several fourth slide rails 23 are mounted on the base plate 1. The first support plate 3 is slidably mounted on the fourth slide rails 23 by a fifth slider 24.

[0021] The Y-axis correction module 4 includes a third motor 41 mounted on a first support plate 3 and a third slide 42 driven by the third motor 41 to move along the Y direction. The third slide 42 is fixed to the bottom of the second support plate 5. The first support plate 3 is provided with a plurality of fifth slide rails 43. The first support plate 3 is slidably mounted on the fifth slide rails 43 by a sixth slider 44.

[0022] The R-axis correction module 6 includes a first motor 61 mounted on a second support plate 5, a first slide 62 driven by the first motor 61 to move along the Y direction, a first transmission unit 63 connected between the first slide 62 and the support frame 7, and a second transmission unit 64 connected between the second support plate 5 and the support frame 7. The second transmission unit 64 is located on the side closer to the first test module 8. An arc-shaped slide rail 65 extending along the Y direction is provided on the second support plate 5. The arc-shaped slide rail 65 is located between the first transmission unit 63 and the second transmission unit 64. The support frame 7 is slidably mounted on the arc-shaped slide rail 65 via a first slider 66. Limit posts 651 are provided at both ends of the arc-shaped slide rail 65 to prevent excessive rotation, protect the R-axis correction module 6 from damage, and improve safety.

[0023] The first transmission unit 63 includes a first support block 631 mounted on a support frame 7 and a first connecting block 632 slidably disposed on the first support block 631 along the X direction. The first connecting block 632 is rotatably connected to the first slide table 62 via a first rotating assembly 633. A first slide rail 634 extending along the X direction is provided on the first support block 631, and the first connecting block 632 is slidably disposed on the first slide rail 634 via a second slider 635. The first transmission unit 63 achieves precise conversion from linear motion to rotational motion, with a compact structure and high transmission accuracy. The support frame 7 has a mounting hole 71 for mounting the first support block 631. To prevent other substances from entering the transmission unit 63 and affecting its transmission, a cover 72 is provided at the upper end of the first mounting hole 71.

[0024] The second transmission unit 64 includes a second slide rail 641 extending in the X direction and mounted on the second support plate 5, a third slider 642 slidably mounted on the second slide rail 641, a second support block 643 mounted on the third slider 642, a third slide rail 644 extending in the Y direction and mounted on the second support block 643, a fourth slider 645 slidably mounted on the third slide rail 644, and a second connecting block 646 mounted on the fourth slider 645. The support frame 7 is rotatably connected to the second connecting block 646 via a second rotating assembly 647. The second transmission unit 64 enables bidirectional sliding compensation in both X and Y directions, ensuring the stability of the rotation center, preventing the R-direction correction module 6 from jamming, and improving the smoothness and reliability of the movement.

[0025] Both the first rotating assembly 633 and the second rotating assembly 647 include a rotating shaft and a bearing. Their rotating connection method is existing technology and will not be described in detail here.

[0026] A base plate 1 is equipped with several first sensors 25, and a second sliding table 22 is equipped with a first sensing element 26 for detection by the first sensors 25. A first support plate 3 is equipped with several second sensors 45, and a third sliding table 42 is equipped with a second sensing element 46 for detection by the second sensors 45. A second support plate 5 is equipped with several third sensors 67, and a first sliding table 62 is equipped with a third sensing element 68 for detection by the third sensors 67. The first sensors 25, second sensors 45, and third sensors 67 can detect displacement in all directions in real time, realize closed-loop control, improve positioning accuracy and repeatability, and avoid cumulative errors.

[0027] The first test module 8 includes a first Z-axis drive component 81 disposed on the upper end of the support frame 7, a first lifting frame 82 driven by the first Z-axis drive component 81 to move up and down, and a first test unit 83 disposed on the first lifting frame 82.

[0028] The second test module 9 includes a second Z-axis drive 91 located at the lower end of the support frame 7, a second lifting frame 92 driven by the second Z-axis drive 91 to move up and down, and a second test unit 93 located on the second lifting frame 92. The second Z-axis drive 91 is located on the side of the base plate 1.

[0029] The first Z-axis drive unit 81 and the second Z-axis drive unit 91 are dual-axis controls, which can not only achieve joint testing of upper and lower drives, but also adapt to battery cells 200 of different thicknesses.

[0030] Since the battery cell 200 is energized during testing, its temperature will rise after the test. In this embodiment, a temperature sensor 94 is installed on the second lifting frame 92 to detect the temperature of the battery cell 200. If the temperature of the battery cell 200 exceeds the required range before or during testing, the temperature sensor 94 will give a signal to prompt the operator to suspend the test. In other embodiments, the temperature sensor 94 can also be installed on the first lifting frame 82. The real-time monitoring by the temperature sensor 94 can prevent the battery cell from overheating and being damaged, ensuring test safety and battery cell quality, and improving the system's intelligence level.

[0031] The first test unit 83 includes a plurality of first test brackets 831 arranged at the bottom of the first lifting frame 82, and each first test bracket 831 has a first test element 832 detachably disposed at its bottom.

[0032] The second test unit 93 includes a plurality of second test brackets 931 arranged on the top of the second lifting frame 92, and a second test element 932 is detachably provided on the top of each second test bracket 931.

[0033] Both the first test element 832 and the second test element 932 can be detachably mounted on the test bracket, facilitating replacement, maintenance, and cleaning, thus reducing long-term maintenance costs. Furthermore, different types of test elements can be flexibly replaced according to testing needs, expanding the equipment's functionality. The first test element 832 and the second test element 932 are connected to the positive and negative terminals of the tester. The first test element 832 and the second test element 932 correspond one-to-one and are both located at the grid lines of the solar cell. After being connected to the solar cell, they enable IV testing. Other tests can also be performed; specific test items are not limited here.

[0034] In this embodiment, the first test element 832 is a thin metal sheet, and the second test element 932 is a probe assembly. The metal sheet makes surface contact with the battery cell above it, while the probe assembly makes point contact with the battery cell below it. This point-to-surface contact method effectively presses the probe assembly against the battery cell surface, preventing damage and ensuring both testing accuracy and product quality. Furthermore, the metal sheet of the first test element 832 not only provides electrical conductivity with the battery cell but also presses it firmly, ensuring full contact and conductivity between the probe assembly and the product, thereby guaranteeing testing accuracy.

[0035] In other embodiments, the structures of the first test element 832 and the second test element 932 can be configured as needed, and their specific structures are not limited here. For example, the first test element 832 can be a probe group and the second test element 932 can be a metal sheet, or the first test element 832 can be a metal sheet and the second test element 932 can be a metal sheet, or the first test element 832 can be a probe group and the second test element 932 can be a probe group.

[0036] In this embodiment, since two solar cells need to be tested each time, two correction units 10 are provided on the base plate 1. Each correction unit 10 is provided with a support frame 7, a first test module 8 and a second test module 9. The two test modules complete the testing of two solar cells at the same time, which can improve the production capacity. An X-axis correction module 2, a Y-axis correction module 4 and an R-axis correction module 6 together constitute a correction module. The two correction units 10 adjust the positions of the two support frames 7 respectively, which can improve the adjustment accuracy and thus ensure the accuracy of the test.

[0037] In other embodiments, a correction unit 10 is provided on the base plate 1, and two support frames 7, two first test modules 8, and two second test modules 9 are provided. The two test modules complete the testing of two battery cells at the same time. One correction unit 10 can adjust the position of two support frames 7 at the same time, which can improve the adjustment efficiency and simplify the structure.

[0038] In another embodiment, the number of the correction unit 10, support frame 7, first test module 8, and second test module 9 is not limited and can be set according to the actual situation.

[0039] When applying the correction testing mechanism 100 provided in this solution, in the initial state, a height space is formed between the first testing module 8 and the second testing module 9. The camera takes a picture of the battery cell 200 to confirm whether the position of the battery cell 200 has shifted. The turntable rotates the battery cell 200 to the height space between the first testing module 8 and the second testing module 9. If the position of the battery cell 200 is not detected to be shifted, the first testing module 8 and the second testing module 9 directly test the battery cell 200. If the position of the battery cell 200 is not shifted, the first testing module 8 and the second testing module 9 directly test the battery cell 200. If the position is offset, the correction unit 10 will activate. The X-axis correction module 2, Y-axis correction module 4, and R-axis correction module 6 of the correction unit 10 will drive the first test module 8 and the second test module 9 to move. The first test element 832 and the second test element 932 will be aligned with the grid lines of the battery cell. The first test element 832 and the second test element 932 will be connected to the positive and negative terminals of the tester. The first test element 832 and the second test element 932 will be in a one-to-one correspondence and will be located at the grid lines of the battery cell. After being connected to the battery cell, IV testing will be achieved.

[0040] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A correction testing mechanism, characterized in that: It includes a base plate, a correction unit disposed on the base plate, a support frame that moves in the XYR directions driven by the correction unit, and a first test module and a second test module disposed on the support frame. The first test module and the second test module are arranged vertically opposite each other and jointly complete the testing of the battery cells. The correction unit includes an X-axis correction module, a first support plate that moves in the X direction driven by the X-axis correction module, a Y-axis correction module disposed on the first support plate, a second support plate that moves in the Y direction driven by the Y-axis correction module, and an R-axis correction module disposed on the second support plate.

2. The correction testing mechanism as described in claim 1, characterized in that: The R-axis correction module includes a first motor mounted on the second support plate, a first slide table driven by the first motor to move along the Y direction, a first transmission unit connected between the first slide table and the support frame, and a second transmission unit connected between the second support plate and the support frame. The second transmission unit is located on the side close to the first test module. The second support plate is provided with an arc-shaped slide rail extending along the Y direction. The arc-shaped slide rail is located between the first transmission unit and the second transmission unit. The support frame is slidably mounted on the arc-shaped slide rail by a first slider.

3. The correction testing mechanism as described in claim 2, characterized in that: The first transmission unit includes a first support block mounted on the support frame and a first connecting block slidably disposed on the first support block along the X direction. The first connecting block is rotatably connected to the first slide table via a first rotating assembly. The first support block is provided with a first slide rail extending along the X direction. The first connecting block is slidably disposed on the first slide rail via a second slider.

4. The correction testing mechanism as described in claim 2, characterized in that: The second transmission unit includes a second slide rail disposed on the second support plate and extending in the X direction, a third slider slidably disposed on the second slide rail, a second support block disposed on the third slider, a third slide rail disposed on the second support block and extending in the Y direction, a fourth slider slidably disposed on the third slide rail, and a second connecting block disposed on the fourth slider. The support frame is rotatably connected to the second connecting block via a second rotating assembly.

5. The correction testing mechanism as described in claim 2, characterized in that: The X-axis correction module includes a second motor mounted on the base plate and a second slide table driven by the second motor to move along the X direction. The second slide table is fixed to the bottom of the first support plate. The base plate is provided with a plurality of fourth slide rails. The first support plate is slidably mounted on the fourth slide rails via a fifth slider. The Y-axis correction module includes a third motor mounted on the first support plate and a third slide table driven by the third motor to move along the Y direction. The third slide table is fixed to the bottom of the second support plate. The first support plate is provided with a plurality of fifth slide rails. The first support plate is slidably mounted on the fifth slide rails via a sixth slider.

6. The correction testing mechanism as described in claim 5, characterized in that: The base plate is provided with a plurality of first sensors, and the second slide is provided with a first sensing plate for detection by the first sensors; the first support plate is provided with a plurality of second sensors, and the third slide is provided with a second sensing plate for detection by the second sensors; the second support plate is provided with a plurality of third sensors, and the first slide is provided with a third sensing plate for detection by the third sensors.

7. The correction testing mechanism as described in claim 1, characterized in that: The first test module includes a first Z-axis drive unit disposed on the upper end of the support frame, a first lifting frame driven by the first Z-axis drive unit to move up and down, and a first test unit disposed on the first lifting frame; the second test module includes a second Z-axis drive unit disposed on the lower end of the support frame, a second lifting frame driven by the second Z-axis drive unit to move up and down, and a second test unit disposed on the second lifting frame.

8. The correction testing mechanism as described in claim 7, characterized in that: The first or second lifting frame is equipped with a temperature sensor for detecting the product temperature.

9. The correction testing mechanism as described in claim 7, characterized in that: The first test unit includes a plurality of first test brackets arranged at the bottom of the first lifting frame, and each first test bracket has a first test element detachably disposed at its bottom. The second test unit includes a plurality of second test brackets arranged on the top of the second lifting frame, and a second test element is detachably provided on the top of each second test bracket; The first test element and the second test element are arranged vertically opposite each other.

10. The correction testing mechanism as described in claim 9, characterized in that: The first test element is a metal sheet or a probe set, and the second test element is a probe set or a metal sheet.

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