Battery piece testing device

Abstract

The utility model provides a battery piece testing device, and the device comprises a fixing mechanism which is used for fixing a battery piece. And the at least one probe group is in contact with the battery piece along a first direction so as to test the battery piece, and the first direction is perpendicular to the plane where the battery piece is located. Wherein each probe in the probe group comprises a probe cylinder and at least one probe head, at least part of the probe head is arranged on one side of the battery piece and used for electrically contacting and communicating with the battery piece, and the probe head is partially arranged in the probe cylinder and movably and electrically connected with the probe cylinder. According to the battery piece testing device disclosed by the invention, the length of the probe can be adaptively adjusted according to the flatness of the battery piece and the PCB, and the accuracy of testing the battery piece is improved.

Description

Technical Field

[0001] This disclosure relates to the field of battery testing technology, and in particular to a battery cell testing device. Background Technology

[0002] IV (current-voltage) testing and EL (electroluminescence) testing of solar cells are key methods for evaluating their electrical performance and internal quality.

[0003] Current testing equipment has a large number of probes, making it impossible to completely guarantee that the end face of each probe is on the same horizontal plane. If it is also impossible to guarantee that the probe test point makes good contact with the solar cell, some probes will cause test errors due to poor contact. Utility Model Content

[0004] In view of the above problems, embodiments of this disclosure provide a battery cell testing apparatus.

[0005] One aspect of this disclosure provides a solar cell testing apparatus, comprising: a fixing mechanism for fixing the solar cell; and at least one probe group that contacts the solar cell along a first direction perpendicular to the plane containing the solar cell for testing. Each probe in the probe group includes a probe cylinder and at least one probe head, at least a portion of the probe head being disposed on one side of the solar cell for electrical contact and communication with the solar cell, and the probe head portion being disposed within the probe cylinder and movable and electrically connected to the probe cylinder.

[0006] According to embodiments of this disclosure, the battery cell testing apparatus further includes: a stage for supporting the battery cell. The probe group includes a first probe group and a second probe group, which are respectively disposed on opposite sides of the battery cell. The first probe group is disposed on the side of the fixing mechanism near the battery cell and is used to fix the battery cell on the stage in the opposite direction of a first direction. The second probe group is used to contact the battery cell in the first direction to test the battery cell.

[0007] According to embodiments of this disclosure, each probe in the second probe group includes a first probe head and a second probe head disposed at both ends of the probe tube. One end of the first probe head is electrically contacted and connected to the battery cell, and the other end of the first probe head is disposed inside the probe tube. One end of the second probe head is electrically contacted and connected to the circuit board, and the other end of the second probe head is disposed inside the probe tube.

[0008] According to embodiments of this disclosure, the probe barrels of each probe in the probe assembly are electrically connected to a circuit board. An elastic element is provided inside the probe barrel, and the elastic element is connected to the end of the probe head furthest from the battery cell.

[0009] According to embodiments of this disclosure, the probe barrels of each probe in the probe group are electrically connected to a circuit board. The probe heads are hermetically connected to the probe barrels to form a cavity within the probe barrels, which is filled with a working gas. The pressure of the working gas is adjusted to push the probe heads to contact the battery cell in a first direction or the opposite direction.

[0010] According to embodiments of this disclosure, a fixing mechanism is disposed on the side of the solar cell away from the probe assembly for adsorbing and fixing the solar cell. The probe assembly is disposed on the other side of the solar cell and is in contact with the solar cell for testing the solar cell.

[0011] According to embodiments of this disclosure, the battery cell testing apparatus further includes a feeding mechanism for moving the battery cells to a fixing mechanism.

[0012] According to embodiments of this disclosure, the battery cell testing apparatus further includes a visual inspection mechanism for acquiring images of the battery cells to perform position detection.

[0013] According to embodiments of this disclosure, the battery cell testing apparatus further includes a position compensation mechanism connected to the fixing mechanism for correcting the position of the battery cells.

[0014] According to embodiments of this disclosure, the number of fixing mechanisms is at least one, each used to fix at least one battery cell.

[0015] This disclosure enables the probe to elastically extend and retract by setting a movable connection between the probe head and the probe cylinder. By using an elastically extendable probe group to test the solar cell, the length of the probe can be adaptively adjusted according to the flatness of the solar cell and the PCB board, so that all areas of the solar cell can make close contact with the probe and the PCB board, thereby improving the accuracy of testing the solar cell. Attached Figure Description

[0016] The foregoing contents, as well as other objects, features, and advantages of this disclosure, will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 A schematic side view of a battery cell testing apparatus according to an embodiment of the present disclosure is shown.

[0018] Figure 2A This schematically illustrates the probe positions of a battery test piece using two sets of probes according to an embodiment of the present disclosure; Figure 2B A schematic top view of a battery cell testing apparatus according to an embodiment of the present disclosure is shown.

[0019] Figure 3 This schematic diagram illustrates the structure of a probe group in a battery cell testing apparatus according to an embodiment of the present disclosure;

[0020] Figure 4 A schematic diagram illustrating the structure of a probe group of a battery cell testing apparatus according to another embodiment of the present disclosure is shown.

[0021] Figure 5 The diagram schematically illustrates the structure of a probe group of a battery cell testing apparatus according to yet another embodiment of the present disclosure.

[0022] [Explanation of Labels in the Attached Image]

[0023] 1-Light source; 2-Fixing mechanism; 3-Probe group; 300-Probe; 301-Probe tube; 302-Probe head; 312-First probe head; 322-Second probe head; 303-Elastic element; 304-Cavity; 31-First probe group; 32-Second probe group; 33-Circuit board; 4-Stage; 5-Feeding mechanism; 6-Position compensation mechanism. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0025] It should be noted that similar or identical parts are referred to by the same reference numerals in the accompanying drawings or description. The technical features of the various embodiments exemplified in the specification can be freely combined to form new solutions without conflict. Furthermore, each claim can stand alone as an embodiment, or the technical features in the various claims can be combined to form new embodiments. In the drawings, the shape or thickness of the embodiments may be enlarged and indicated in a simplified or convenient manner. Moreover, elements or implementations not shown or described in the drawings are those known to those skilled in the art. Additionally, although this document provides examples of parameters containing specific values, it should be understood that the parameters need not be exactly equal to the corresponding values, but can approximate the corresponding values ​​within acceptable error tolerances or design constraints.

[0026] Unless there are technical obstacles or contradictions, the various embodiments described above in this disclosure can be freely combined to form other embodiments, all of which are within the protection scope of this disclosure.

[0027] Although this disclosure has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of this disclosure and should not be construed as limiting the disclosure. The dimensions in the drawings are merely illustrative and should not be construed as limiting the disclosure.

[0028] While some embodiments of the general concept of this disclosure have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the general concept of this disclosure, the scope of which is defined by the claims and their equivalents.

[0029] Figure 1 A schematic side view of a battery cell testing apparatus according to an embodiment of the present disclosure is shown.

[0030] According to embodiments of this disclosure, such as Figure 1 As shown, this disclosure provides a battery cell testing apparatus, including: a fixing mechanism 2 for fixing the battery cell; and at least one probe group 3 that contacts the battery cell along a first direction x to test the battery cell, the first direction being perpendicular to the plane where the battery cell is located. Each probe 300 in the probe group 3 includes a probe cylinder 301 and at least one probe head 302. At least a portion of the probe head 302 is disposed on one side of the battery cell for electrical contact and communication with the battery cell. A portion of the probe head 302 is disposed within the probe cylinder 301 and is movable and electrically connected to the probe cylinder 301.

[0031] During testing, a light source 1 can also be set up to provide test light illuminating the light-facing side of the solar cell. For example, the light source can be a xenon lamp, LED light source, etc., used to simulate the solar spectrum and light intensity, providing standard light source conditions for solar cell testing. These light source devices typically have stable light output and high spectral matching. The probe is made of a material with a certain precision and conductivity to more accurately detect contact with the solar cell, ensuring good contact and current transmission. Its shape and size are customized according to the electrode design of the solar cell to ensure optimal contact performance.

[0032] The solar cell testing device also includes a fixing mechanism. This mechanism can effectively clamp or adsorb and fix the solar cells, preventing them from moving or deforming during the test, thereby ensuring the accuracy of the test results and enabling stable and accurate testing of the solar cells.

[0033] This testing apparatus includes at least one probe set for performing electrical performance tests on the solar cell. Each probe in the probe set consists of a probe tube and at least one probe head. These probe heads are partially disposed within the probe tube and are movable and electrically connected to the probe tube. During testing, at least some of the probe heads are electrically connected to the electrode portion of the solar cell, thereby enabling the measurement of the solar cell's electrical performance parameters, and allowing for electrical performance tests (such as IV testing) and EL tests (such as voltage and current) on the battery.

[0034] This embodiment describes a battery cell testing device. By setting a probe head and a probe cylinder to be movably connected, the probe can be elastically extended and retracted. By using an elastically extendable probe group to test the battery cell, the length of the probe can be adaptively adjusted according to the flatness of the battery cell and the PCB board, so that all areas of the battery cell can be in close contact with the probe and the PCB board, thereby improving the accuracy of battery cell testing.

[0035] Figure 2A The diagram schematically illustrates a structure for testing a battery cell using two sets of probes according to an embodiment of the present disclosure. Figure 2B A schematic top view of a battery cell testing apparatus according to an embodiment of the present disclosure is shown.

[0036] According to embodiments of this disclosure, such as Figure 2A and Figure 2B As shown, the battery cell testing device also includes: a stage 4 for supporting the battery cells. The probe group 3 includes a first probe group 31 and a second probe group 32, which are respectively disposed on opposite sides of the battery cell. The first probe group 31 is disposed on the side of the fixing mechanism 2 near the battery cell and is used to fix the battery cell on the stage 4 in the opposite direction of the first direction. The second probe group 32 is used to contact the battery cell in the first direction to test the battery cell.

[0037] In some embodiments, the testing apparatus includes two sets of probes: a first probe set and a second probe set.

[0038] The first probe group is fixedly mounted on the fixing mechanism, and the probe head of each probe in the group points to the battery cell. When the fixing mechanism moves toward the battery cell in the opposite direction to a first direction perpendicular to the plane of the battery cell, the probe heads of the first probe group will come into contact with the battery cell and fix it on the stage.

[0039] The second probe group can move along the first direction so that different probes are electrically connected to the positive and negative electrodes of the battery cell, respectively.

[0040] It is understandable that, depending on the battery type, such as the single-sided battery in the above embodiment, the first probe group serves to fix the battery cell. For a double-sided battery, the first probe group can also be connected to the front electrode of the battery cell to test it.

[0041] Figure 3 The diagram schematically illustrates the structure of a probe group in a cell testing apparatus according to an embodiment of the present disclosure.

[0042] According to embodiments of this disclosure, such as Figure 3As shown, each probe 300 in the second probe group 32 includes a first probe head 312 and a second probe head 322 disposed at both ends of the probe tube 301. One end of the first probe head 312 is electrically contacted and connected to the battery cell, and the other end of the first probe head 312 is disposed inside the probe tube 301. One end of the second probe head 322 is electrically contacted and connected to the circuit board 33, and the other end of the second probe head 322 is disposed inside the probe tube 301.

[0043] In this embodiment, each probe is a "dual-headed probe" comprising a first probe head and a second probe head. This dual-headed probe design ensures accuracy and stability during the testing process.

[0044] The first probe is used to electrically connect to the solar cell.

[0045] The second probe is used for electrical connection to the circuit board (PCB). It is connected to the test point on the PCB through a specific connection method (such as soldering, plugging, etc.) to ensure accurate transmission of test signals.

[0046] In this embodiment, the first probe head and the second probe head are designed to correspond one-to-one and be electrically connected. This design ensures that each probe can be independently connected to the battery cell and the PCB, thereby improving the accuracy and reliability of the test.

[0047] The arrangement and layout of the probe array are customized according to the size and electrode layout of the solar cell. During testing, the probe array contacts the solar cell via a precise moving mechanism (such as a robotic arm or rotating platform) and establishes an electrical connection. The testing system then performs testing operations, such as measuring the solar cell's voltage, current, and other performance parameters.

[0048] For example, in solar cell testing, the first probe head includes probes that contact the positive and negative electrodes respectively, and is connected to the PCB via corresponding second probe heads, forming a closed loop. By applying voltage to the probes and measuring the resistance in the loop, the current value in the solar cell can be indirectly obtained. Alternatively, by applying current to the probes, the corresponding voltage response can be measured. Based on these measurement data, key performance parameters of the solar cell, such as open-circuit voltage, short-circuit current, fill factor, and conversion efficiency, can be calculated.

[0049] This embodiment improves the testing accuracy of the battery cells by introducing a correspondence between the first and second probe heads and an electrical connection design, which allows the probes to make close contact with both the battery cells and the PCB board.

[0050] In some embodiments, the testing mechanism further includes a first probe fixing plate and a second probe fixing plate, which are used to fix the probe tubes on the sides where the first probe head and the second probe head are located, respectively.

[0051] The first probe fixing plate includes multiple first probe fixing holes. The shape and size of these holes match the first probe head to ensure that the probe tube on the side where the first probe head is located can be firmly fixed in the hole, while the first probe head can also extend and retract within the first probe fixing hole. Through the first probe fixing holes, the first probe head can stably and effectively contact the battery cell.

[0052] The second probe mounting plate includes multiple second probe mounting holes. The shape and size of these holes match the second probe head to ensure that the probe barrel on the side where the second probe head is located can be securely fixed in the holes, while the second probe head can also extend and retract within these mounting holes. Through the second probe mounting holes, the second probe head can achieve stable and good contact with the circuit board (PCB).

[0053] The use of a first probe mounting plate and a second probe mounting plate ensures the stability and reliability of the probe assembly during testing. This helps reduce testing errors and improve testing accuracy. Simultaneously, because the probe assembly is firmly fixed to the mounting plates, damage and wear to the probes during testing are reduced, which also helps lower maintenance costs and extend the service life of the testing mechanism.

[0054] The first probe and the second probe can be matched one-to-one and are electrically connected.

[0055] Figure 4 A schematic diagram of the probe group of a battery cell testing apparatus according to another embodiment of the present disclosure is shown.

[0056] According to embodiments of this disclosure, such as Figure 4 As shown, the probe tube 301 of each probe 300 in probe group 3 is electrically connected to the circuit board 33. An elastic element 303 is provided inside the probe tube 301, and the elastic element 303 is connected to the end of the probe head 302 away from the battery cell.

[0057] In some embodiments, the probe barrels of each probe are fixedly connected to a circuit board (PCB) and electrically connected. This connection method ensures a stable connection and signal transmission between the probe group and the PCB.

[0058] For example, the probe tube is tightly attached to the PCB by specific fixing devices (such as screws, soldering, etc.) to prevent it from loosening or falling off during testing.

[0059] Each probe barrel contains an elastic element to push the probe tip into contact with the solar cell in a first direction or the opposite direction. The design of the elastic element ensures that the probe tip maintains good contact with the solar cell when subjected to external forces (such as downward pressure during testing), thereby ensuring the accuracy of the test. The elastic element can be, for example, a helical spring, an elastic sheet, an elastic membrane, or an elastic element made of soft materials such as rubber or silicone.

[0060] The elastic structure allows the probe tip to adaptively adjust the contact pressure according to the surface morphology of the solar cell. This helps ensure reliable test results under different conditions, such as solar cells of different thicknesses and roughnesses.

[0061] Meanwhile, the elasticity of the elastic component also buffers the impact force during the testing process, protecting the probe tip and battery cells from damage. The durable design of the probe tube and elastic component allows the probe assembly to withstand long-term, high-frequency testing operations without easily being damaged. This helps reduce testing costs and improve testing efficiency.

[0062] Understandably, each probe tube can be in direct contact with the circuit board, or it can be electrically connected to the circuit board via wires.

[0063] Figure 5 The diagram schematically illustrates the structure of a probe group of a battery cell testing apparatus according to yet another embodiment of the present disclosure.

[0064] According to embodiments of this disclosure, such as Figure 5 As shown, the probe tubes 301 of each probe 300 in probe group 3 are electrically connected to the circuit board 33. The probe head 302 is hermetically connected to the probe tube 301 to form a cavity 304 inside the probe tube 301. The cavity 304 is filled with working gas so that the pressure of the working gas can be adjusted to push the probe head 302 to contact the battery cell in the first direction x or the opposite direction of the first direction x.

[0065] In some embodiments, the probe barrels of each probe are fixedly connected to a circuit board (PCB) and electrically connected. This connection method ensures a stable connection and signal transmission between the probe group and the PCB.

[0066] The probe tip and probe barrel are connected in an airtight manner. This connection can be a threaded seal, an O-ring seal, or other effective airtight sealing method. The airtight connection ensures that a closed cavity is formed inside the probe barrel, which will be filled with a working gas, such as compressed air, in subsequent steps.

[0067] The airtight connection between the probe tube and the probe head simplifies probe assembly maintenance. When the probe head needs replacement or other maintenance is required, simply disassemble the airtight connection.

[0068] Compressed air fills the cavity formed inside the probe tube. The compressed air serves as the driving force to push the probe head to contact the solar cell in a first direction or the opposite direction.

[0069] By using compressed air as the driving force, the probe assembly can achieve precise control over the contact pressure and contact speed between the probe tip and the solar cell. This helps to obtain more accurate and reliable test results during the testing process.

[0070] Compressed air, as a driving force, offers significant adaptability, accommodating solar cells of varying thicknesses and roughnesses. Furthermore, the adjustability of compressed air allows the probe assembly to flexibly meet diverse testing requirements. By controlling the pressure and flow rate of the compressed air, the contact pressure and speed between the probe tip and the solar cell can be precisely adjusted.

[0071] This embodiment improves the accuracy and adaptability of the probe assembly during testing by introducing an airtight connection between the probe head and the probe cylinder, and by filling the cavity with compressed air. These improvements help increase testing accuracy and efficiency while reducing testing costs.

[0072] According to embodiments of this disclosure, the fixing mechanism 2 is disposed on the side of the battery cell away from the probe group 3, for adsorbing and fixing the battery cell. The probe group 3 is disposed on the other side of the battery cell and is in contact with the battery cell for testing the battery cell.

[0073] In some embodiments, the fixing mechanism is, for example, a glass plate, in which a plurality of air channels are provided, and the plurality of air channels are respectively connected to a plurality of air holes provided on the surface of the glass plate, so as to form a vacuum negative pressure at the plurality of air holes to adsorb and fix the battery cells.

[0074] For example, the glass plate contains multiple air channels that form a complex network structure within the plate to transmit and distribute vacuum negative pressure. The design of the air channels takes into account the size, shape, and adsorption requirements of the solar cells to ensure that each air channel can be effectively connected to its corresponding pore.

[0075] Multiple pores connected to air channels are formed on the surface of the glass plate. These pores are evenly distributed to ensure uniform adsorption of the solar cells onto the glass plate. The size and shape of the pores are designed to match the size and shape of the solar cells, thus providing optimal adsorption. The air channel and pore design of the glass plate is flexible and can accommodate solar cells of different sizes, shapes, and specifications to meet diverse testing or processing needs.

[0076] The air channels and pores of the glass plate are connected to the vacuum negative pressure system. When the vacuum negative pressure system is activated, the air in the air channels is extracted, creating a vacuum negative pressure. This vacuum negative pressure acts on the solar cells through the pores, generating a strong adsorption force that firmly fixes the solar cells to the glass plate.

[0077] Through the coordinated operation of the air passages and pores, the fixing mechanism can generate a strong vacuum negative pressure in a short time, thereby efficiently adsorbing and fixing the battery cells.

[0078] The probe group can move along the first direction so that different probes are electrically connected to the positive and negative electrodes of the battery cell, respectively.

[0079] The testing device in this embodiment only requires a set of probes to test the battery cell from one side, which simplifies the structure of the testing device and is suitable for testing scenarios with a lifting adsorption feeding mechanism.

[0080] According to embodiments of this disclosure, the battery cell testing apparatus further includes a feeding mechanism 5 for moving the battery cells to the fixing mechanism 2.

[0081] In some embodiments, the feeding mechanism includes, for example, a conveyor belt, rollers or other transmission devices, a robotic arm or robotic gripper, which uses actions and functions such as conveying, gripping, transferring, and placing to place the battery cells in a fixed position and cooperate with the fixing mechanism to directly adsorb the battery cells onto the fixing mechanism or fix the battery cells onto the platform.

[0082] According to embodiments of this disclosure, the battery cell testing apparatus further includes: a visual inspection mechanism for acquiring images of the battery cells for position detection; and a position compensation mechanism 6, connected to the fixing mechanism 2, for correcting the position of the battery cells.

[0083] In some embodiments, when the feeding mechanism transports the solar cells along a second direction (typically parallel to the long or short side of the solar cell), it ensures that the solar cells can reach the designated position smoothly and accurately.

[0084] Visual inspection mechanisms, such as cameras, webcams, and CCD vision inspection devices, are placed at a predetermined position on the testing equipment to capture real-time images of the solar cells. Through image processing technology, the camera can identify the edges or specific markings (such as Mark points, Pad points, or QR codes) of the solar cells, thereby determining their offset relative to the test position or a fixed position.

[0085] The position compensation mechanism is used to correct the position of the solar cell based on the offset. This achieves precise adjustment of the solar cell position, making the position of the solar cell and the detection probe more accurate, facilitating the alignment of the test points on the solar cell grid lines with the corresponding probe heads, and ensuring good electrical contact between the probe and the solar cell. In one specific embodiment, a UVW system can be used, which controls the probe to rotate around the center point of the solar cell in a plane and translate in any direction to achieve alignment of the probe head with the test points on the solar cell grid lines.

[0086] Through precise camera shooting and image processing technology, along with the fine adjustment of the position compensation mechanism, the feeding mechanism can achieve high-precision positioning of the solar cells. The collaboration between the vision inspection mechanism and the position compensation mechanism enables full automation of the solar cell process from transport to positioning, reducing manual intervention and improving production efficiency.

[0087] Understandably, the feeding mechanism can handle solar cells of different sizes, shapes, and specifications. By adjusting the transmission speed of the feeding mechanism and the adjustment range of the position compensation mechanism, it can adapt to different production needs.

[0088] The position compensation mechanism can also further correct the position of the solar cells based on this offset. By first pre-positioning at the loading position and then precisely positioning at the testing position, the high-precision requirements of 0BB (non-busbar solar cell) testing can be met.

[0089] It should be noted that the pre-positioning at the feeding position is to make a fine adjustment to the position of the battery cell, while the repositioning at the testing position is to compensate for the position of the probe accordingly.

[0090] According to embodiments of this disclosure, the number of fixing mechanisms 2 is at least one, each used to fix at least one battery cell.

[0091] In some embodiments, multiple or multiple sets of feeding mechanisms can be set up to achieve simultaneous feeding, fixing, and detection of multiple solar cells through feeding and fixing. At this time, multiple sets of detection mechanisms and probes can also be used to complete the synchronous position calibration and testing of multiple solar cells.

[0092] For example, the loading mechanism includes multiple conveyor belts, each capable of transporting one or half a solar cell. Multiple conveyor belts can simultaneously transport and grip multiple solar cells onto a stage for adsorption and fixation, or transport and lift multiple solar cells under a glass plate for adsorption and fixation. After the solar cells are adsorbed onto the stage or glass plate, multiple positioning cameras can be used to capture and determine the offset of each solar cell relative to the test position. Then, a corresponding UVW system is used to compensate the position of the probe group measuring the cells, achieving synchronous and accurate testing of multiple solar cells.

[0093] It should be noted that although multiple cells can be transported, fixed, positionally compensated, and tested simultaneously, the conveyor belt, gripping or lifting components, positioning camera, probe, and corresponding UVW system that perform related operations on each cell can be controlled independently. Even if the relative positions of the multiple cells being tested simultaneously change, the testing accuracy will not be reduced.

[0094] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process may be rearranged without departing from the scope of this disclosure. The appended method claims provide elements of various steps in an exemplary order and are not intended to limit the scope to a specific order or hierarchy.

[0095] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted when they may cause confusion in understanding this disclosure. Furthermore, the shapes, sizes, and positional relationships of the components in the drawings do not reflect their actual size, scale, or actual positional relationships.

[0096] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, this disclosure is in a state of having fewer features than all of the features of the single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of this disclosure.

[0097] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly specified. The term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as "including" is used as a conjunction in the claims. The use of any term "or" in the specification or claims is intended to mean "non-exclusive or."

[0098] The specific embodiments described above further illustrate the purpose, technical solutions, and beneficial effects of this disclosure. It should be understood that the above descriptions are merely specific embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A battery cell testing device, characterized in that, include: A fixing mechanism is used to fix the battery cells; At least one probe group contacts the battery cell along a first direction perpendicular to the plane in which the battery cell is located to test the battery cell; Each probe in the probe group includes a probe tube and at least one probe head. At least a portion of the probe head is disposed on one side of the battery cell for electrical contact and communication with the battery cell. The probe head is partially disposed inside the probe tube and is movable and electrically connected to the probe tube.

2. The battery cell testing apparatus according to claim 1, characterized in that, Also includes: A stage for supporting the battery cells; The probe group includes a first probe group and a second probe group, which are respectively disposed on opposite sides of the battery cell. The first probe group is disposed on the side of the fixing mechanism close to the battery cell and is used to fix the battery cell on the stage in the opposite direction of the first direction. The second probe group is used to contact the battery cell in the first direction to test the battery cell.

3. The battery cell testing apparatus according to claim 2, characterized in that, Each probe in the second probe group includes a first probe head and a second probe head disposed at both ends of the probe tube; The first probe head has one end electrically contacting and connected to the battery cell, and the other end of the first probe head is located inside the probe tube. The second probe head has one end electrically contacting and connected to the circuit board, and the other end of the second probe head is located inside the probe tube.

4. The battery cell testing apparatus according to claim 1, characterized in that, The probe tubes of each probe in the probe group are electrically connected to the circuit board; and An elastic element is provided inside the probe tube, and the elastic element is connected to the end of the probe head away from the battery cell.

5. The battery cell testing apparatus according to claim 1, characterized in that, The probe tubes of each probe in the probe group are electrically connected to the circuit board; and The probe head is hermetically connected to the probe tube to form a cavity inside the probe tube. The cavity is filled with working gas, and the pressure of the working gas is adjusted to push the probe head to contact the battery cell in the first direction or the opposite direction.

6. The cell testing apparatus according to claim 4 or 5, characterized in that, The fixing mechanism is located on the side of the battery cell away from the probe group, and is used to adsorb and fix the battery cell. The probe group is positioned on the other side of the battery cell and is in contact with the battery cell to test the battery cell.

7. The battery cell testing apparatus according to claim 1, characterized in that, Also includes: A feeding mechanism is used to move the battery cells to the fixing mechanism.

8. The battery cell testing apparatus according to claim 7, characterized in that, Also includes: A visual inspection mechanism is used to acquire images of the battery cells for position detection.

9. The battery cell testing apparatus according to claim 8, characterized in that, Also includes: A position compensation mechanism, connected to the fixing mechanism, is used to correct the position of the battery cell.

10. The battery cell testing apparatus according to claim 1, characterized in that, The number of fixing mechanisms is at least one, each used to fix at least one of the battery cells.

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