Battery piece testing device

Abstract

The utility model relates to a battery piece testing device. The battery piece testing device comprises a probe row, a light-transmitting plate and a lifting mechanism. The light-transmitting plate is arranged opposite to the probe row in the first direction, at least one test station for placing a battery piece to be tested is arranged between the light-transmitting plate and the probe row, the light-transmitting plate is further provided with a gas circuit, the gas circuit comprises a main circuit and at least one branch circuit, the main circuit is communicated with a gas inlet interface, and the projection of the main circuit in the first direction is not overlapped with the test station; one end of the branch is communicated with the main path, the projection of the other end of the branch in the first direction falls into the edge area of the test station, and the part, falling into the test station, of the projection on the branch is provided with an air outlet hole which penetrates through one side, close to the probe row, of the light-transmitting plate; and the lifting mechanism is used for driving the probe row and the light-transmitting plate to move close to each other or away from each other. According to the battery piece testing device, the accuracy of battery piece testing is improved.

Description

Technical Field

[0001] The present application relates to the technical field of solar cells, and in particular to a solar cell testing device. Background Art

[0002] After solar cell production is complete, they must undergo IV testing (current-voltage characteristic curve testing) and EL (electroluminescent) testing to ensure cell quality. In actual production, these tests are typically performed on cells using a cell testing device.

[0003] The cell testing device generally includes a probe row and a light-transmitting plate that are relatively arranged. During the test, the cell is placed between the probe row and the light-transmitting plate, and then the probe row and the light-transmitting plate are driven by a lifting mechanism to respectively abut against the two sides of the cell. During the IV test, the cell is illuminated by a light source through the light-transmitting plate, and the probe row collects the current and voltage data generated by the cell after being illuminated. During the EL test, the probe row energizes the cell, and after energization, the cell emits light, and then the camera takes a picture of the cell to complete the test. After the test is completed, the probe row and the light-transmitting plate are driven to separate from the cell by the lifting mechanism. In order to prevent equipment abnormalities caused by the inability to separate the cell and the light-transmitting plate in time due to atmospheric pressure, an air duct is usually provided in the light-transmitting plate, and high-pressure gas is introduced between the light-transmitting plate and the cell through the air duct to separate the light-transmitting plate from the cell.

[0004] However, in the related art, the light transmittance of the light-transmitting plate of the cell testing device is poor, which easily blocks the light source and the camera, resulting in large errors in the testing of the cell and an inability to accurately obtain test data. Utility Model Content

[0005] Based on this, it is necessary to provide a battery cell testing device to improve the test accuracy.

[0006] The present application provides a battery cell testing device, comprising:

[0007] Probe row;

[0008] A light-transmitting plate, wherein the light-transmitting plate is arranged opposite to the probe row in a first direction, at least one test station for placing the battery cells to be tested is provided between the light-transmitting plate and the probe row, the projection of the light-transmitting plate in the first direction covers the test station, the light-transmitting plate is further provided with an air path, the air path includes a main path and at least one branch path, the main path is connected to an air inlet interface, the projection of the main path in the first direction does not overlap with the test station; one end of the branch path is connected to the main path, the projection of the other end of the branch path in the first direction falls into the edge area of ​​the test station, and an air outlet is provided on the part of the branch path projected into the test station, and the air outlet passes through the side of the light-transmitting plate close to the probe row; and

[0009] A lifting mechanism is connected to the probe row and / or the light-transmitting plate, and is used to drive the probe row and the light-transmitting plate to move toward or away from each other.

[0010] The technical solution is further described below:

[0011] In one embodiment, a plurality of the test stations are formed between the light-transmitting plate and the probe row, and the test stations are arranged at intervals along a second direction intersecting the first direction.

[0012] In one embodiment, the main path includes:

[0013] a first main pipe, wherein a projection of the first main pipe in the first direction is located on one side of the test station, and the first main pipe extends along the second direction, and a plurality of branches are connected to the first main pipe, the branches on the first main pipe are arranged at intervals along the second direction, and the projections of one end of each branch in the first direction fall into an edge area of ​​one side of the test station in a one-to-one correspondence;

[0014] a second main pipe, the projection of the second main pipe in the first direction being located on the other side of the test station, the second main pipe extending along the second direction, the plurality of branches being connected to the second main pipe, the branches on the second main pipe being arranged at intervals along the second direction, and the projections of one end of each branch in the first direction falling into the edge area on the other side of the test station in a one-to-one correspondence; and

[0015] A connecting pipe, the projection of which in the first direction is located between two adjacent testing stations and connects the first main pipe with the second main pipe.

[0016] In one embodiment, one end of the air inlet interface is connected to the first main pipe or the second main pipe or the connecting pipe, and the other end of the air inlet interface passes through a side of the light-transmitting plate away from the probe row.

[0017] In one embodiment, the lifting mechanism includes:

[0018] A mounting frame connected to an edge of the light-transmitting plate; and

[0019] A lifting drive member is connected to the mounting frame, and is used to drive the mounting frame and the probe row to move toward or away from each other.

[0020] In one embodiment, the mounting bracket comprises:

[0021] a bracket, the bracket being connected to the lifting drive member, the bracket being provided with a protruding support plate, and the edge of the light-transmitting plate being overlapped on the support plate; and

[0022] A fixing plate is arranged on a side of the light-transmitting plate away from the probe row, and a threaded connector is provided on the fixing plate, and the threaded connector is threadedly connected to the support plate.

[0023] In one embodiment, a positioning groove is provided on the side of the support plate facing away from the probe row, the edge of the light-transmitting plate is arranged in the positioning groove, and the side surface of the light-transmitting plate facing away from the probe row is flush with the side surface of the support plate facing away from the probe row.

[0024] In one embodiment, the cell testing device further includes a standard cell, which is disposed between the light-transmitting plate and the probe row, and the projection of the light-transmitting plate in the first direction covers the standard cell.

[0025] In one embodiment, the light-transmitting plate is a glass plate.

[0026] In one embodiment, the thickness of the glass plate is 5 mm-10 mm; and / or the light transmittance of the glass plate is greater than or equal to 98%.

[0027] In the above-mentioned cell testing device, an air path is set in the light-transmitting plate, and the air path is configured to include a main path and a branch path, the projection of the main path in the first direction does not overlap with the test station; the projection of one end of the branch path in the first direction falls into the edge area of ​​the test station. Compared with the traditional test device in which the air path directly crosses the cell to be tested, the cell testing device of the present application ensures that the air path can output high-pressure gas to the cell to be tested, so that the cell to be tested and the light-transmitting plate can be smoothly separated, while greatly reducing the shading area of ​​the cell to be tested by the air path, thereby avoiding the problem of large errors in IV testing and EL testing due to air path obstruction, and improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only for illustrative purposes and are not necessarily drawn to true scale.

[0031] Figure 1 Schematic diagram of the structure of a battery cell testing device according to an embodiment.

[0032] Figure 2 for Figure 1 A perspective view of the cell testing device shown in FIG. 1 from a top view.

[0033] Figure 3 for Figure 1 The front view of the cell test device is shown after the light source is hidden.

[0034] Figure 4 for Figure 3 Schematic diagram of the structure of the battery cell testing device shown in another perspective.

[0035] Description of reference numerals:

[0036] 10. Light-transmitting plate; 20. Air path; 21. Main path; 211. First main pipe; 212. Second main pipe; 213. Connecting pipe; 22. Branch line; 23. Air inlet interface; 30. Lifting mechanism; 31. Mounting frame; 311. Bracket; 312. Support plate; 313. Fixing plate; 314. Positioning slot; 32. Lifting drive member; 41. Standard battery cell; 42. Support frame; 50. Battery cell to be tested; 60. Light source. DETAILED DESCRIPTION

[0037] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0039] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0040] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0041] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0043] As previously mentioned, traditional cell testing devices have large cell testing errors. After extensive research, the inventors of this application discovered that the reason for this is that traditional cell testing devices typically have multiple air paths within their light-transmitting panels. Each air path spans over the cell to be tested. During IV testing, the air paths can easily block the light source from reaching the light-receiving surface of the cell to be tested, thereby affecting IV test accuracy. During EL testing, the air paths can also easily block the camera's field of view of the cell to be tested, similarly affecting EL test accuracy.

[0044] Based on this, an embodiment of the present application provides a cell testing device that can improve the accuracy of IV testing and / or EL testing of solar cells. Figure 1 as well as Figure 2A cell testing device according to an embodiment includes a probe row (not shown), a light-transmitting plate 10 and a lifting mechanism 30, wherein the probe row is used to collect current data and voltage data of the cell 50 to be tested in IV testing and to energize the cell 50 to be tested in EL testing.

[0045] The light-transmitting plate 10 is used to cover the light-receiving surface of the cell 50 to be tested. The light-transmitting plate 10 is arranged opposite to the probe row in the first direction. For example, the first direction can be a vertical direction perpendicular to the horizontal plane, for example Figure 3 At least one test station for placing the cell 50 to be tested is provided between the light-transmitting plate 10 and the probe row, and the projection of the light-transmitting plate 10 in the first direction covers the test station.

[0046] Furthermore, the light-transmitting plate 10 is also provided with an air path 20, which includes a main path 21 and at least one branch path 22. The main path 21 is connected to an air inlet interface 23, and the projection of the main path 21 in the first direction does not overlap with the test station; one end of the branch path 22 is connected to the main path 21, and the other end of the branch path 22 extends outward and the projection in the first direction falls into the edge area of ​​the test station. The edge area of ​​the test station refers to the part of the test station close to the edge. Exemplarily, the projection area of ​​the branch path 22 falling on the test station is less than or equal to 0.25% of the area of ​​the test station, that is, the area of ​​the battery cell blocked by the branch path 22 is less than or equal to 0.25% of the area of ​​the battery cell. Furthermore, an air outlet (not shown) is provided on the part of the branch path 22 projected to fall into the test station, and the air outlet passes through the side of the light-transmitting plate 10 close to the probe row.

[0047] The lifting mechanism 30 is connected to the probe row and / or the light-transmitting plate 10 . The lifting mechanism 30 is used to drive the probe row and the light-transmitting plate 10 to move toward or away from each other.

[0048] For example, in one embodiment, when the cell testing device is working, the cell is first transferred to the testing station, and then the lifting mechanism 30 drives the probe row and the light-transmitting plate 10 to approach each other until the probe row abuts against the backlight surface of the cell 50 to be tested and forms an electrical connection with the cell 50 to be tested, and the light-transmitting plate 10 abuts against the light-receiving surface of the cell.

[0049] When an IV test is required, a light source 60 is used to illuminate the light-receiving surface of the cell 50 to be tested. For example, the light source 60 can be a xenon lamp positioned above the light-transmitting plate 10, or a natural light source. When the cell 50 to be tested is illuminated, it generates current and voltage. The current and voltage data of the cell 50 to be tested are collected and fed back to the IV test module, which ultimately calculates the IV data of the cell 50 to be tested, completing the IV test.

[0050] When an EL test is required, the battery cell 50 to be tested is energized through the probe row. The battery cell 50 to be tested emits light after being energized. A camera is then used to take a picture of the battery cell 50 to be tested. Based on the light and dark differences in various areas of the battery cell 50 to be tested in the photo, the current received by the corresponding area can be obtained, thereby completing the EL test.

[0051] After the test is completed, the probe row and the light-transmitting plate 10 are driven away from each other by the lifting mechanism 30, and at the same time, high-pressure gas is introduced into the gas path 20 through the air inlet interface 23, so that the high-pressure gas is sprayed from the air outlet along the gas path 20 to the battery cell 50 to be tested, thereby ensuring that the battery cell 50 to be tested is smoothly separated from the light-transmitting plate 10.

[0052] In the above-mentioned cell testing device, an air path 20 is set in the light-transmitting plate 10, and the air path 20 is configured to include a main path 21 and a branch path 22. The projection of the main path 21 in the first direction does not overlap with the test station; the projection of one end of the branch path 22 in the first direction falls into the edge area of ​​the test station. Compared with the traditional test device in which the air path 20 directly crosses the cell to be tested 50, the cell testing device of the present application ensures that the air path 20 can output high-pressure gas to the cell to be tested 50, so that the cell to be tested 50 and the light-transmitting plate 10 can be smoothly separated, while greatly reducing the shading area of ​​the cell to be tested 50 by the air path 20, thereby avoiding the problem of large errors in IV testing and EL testing due to shading by the air path 20, and improving the accuracy of the test results.

[0053] See also Figure 2 Optionally, in one embodiment, a plurality of test stations are formed between the light-transmitting plate 10 and the probe row, for example, 2, 3, 4, 5 or more test stations. The test stations are arranged at intervals along a second direction intersecting the first direction. For example, the second direction may be a horizontal direction perpendicular to the first direction, for example Figure 2 By placing a battery cell 50 to be tested at each test station, multiple battery cells can be tested simultaneously in one test, thereby improving test efficiency and reducing costs.

[0054] Continue to see Figure 2In one embodiment, the main passage 21 of the air pipe includes a first main passage 211, a second main passage 212, and a connecting pipe 213. The first main passage 211 and the second main passage 212 both extend along the second direction, and their projections in the first direction are located on opposite sides of the film placement station. Multiple branch passages 22 are connected to each of the first main passage 211 and the second main passage 212. The branches 22 on the first main passage 211 are arranged at intervals along the second direction, and the projections of one end of each branch passage 22 in the first direction fall into one-to-one correspondence on the edge area of ​​one side of the test station. The branches 22 on the second main passage 212 are arranged at intervals along the second direction, and the projections of one end of each branch passage 22 in the first direction fall into one-to-one correspondence on the edge area of ​​the other side of the test station. The projection of the connecting pipe 213 in the first direction is located between two adjacent test stations and connects the first main passage 211 and the second main passage 212.

[0055] The above arrangement prevents the main circuit 21 from blocking the light-receiving surface of the cell while ensuring that the various branches 22 can be interconnected. Therefore, after high-pressure gas is introduced into the main circuit 21 via the air inlet port 23, the air outlets on each branch 22 can spray high-pressure gas toward the cell to be tested at the corresponding test station, allowing the cell to be tested 50 at each test station to be smoothly separated from the light-transmitting plate 10. Furthermore, each test station has a corresponding air outlet on both sides of the edge area, ensuring that the forces on both ends of the cell to be tested 50 are balanced when separating the light-transmitting plate 10 from the cell to be tested 50, thus preventing the cell to be tested 50 from cracking or fragmenting.

[0056] See also Figure 3 Optionally, in one embodiment, one end of the air inlet port 23 is connected to the first main pipe 211, and the other end of the air inlet port 23 extends out from the side of the light-transmitting plate 10 facing away from the probe row, thereby facilitating connection of the air inlet port 23 to an air pump or high-pressure air source. It is understood that in other embodiments, the air inlet port 23 may also be connected to the second main pipe 212 or the connecting pipe 213.

[0057] See also Figure 1 In one embodiment, the lifting mechanism 30 includes a mounting frame 31 and a lifting drive 32. The mounting frame 31 is connected to the edge of the light-transmitting plate 10, thereby fixing the light-transmitting plate 10 without affecting the light transmittance of the light-transmitting plate 10. The lifting drive 32 is connected to the mounting frame 31 and is used to drive the mounting frame 31 and the probe row to move toward or away from each other, thereby achieving the light-transmitting plate 10 and the probe row approaching each other to respectively abut the light-receiving surface and the backlight surface of the battery cell 50 to be tested, and the light-transmitting plate 10 and the probe row moving away from each other to release the battery cell 50 to be tested.

[0058] See also Figure 3In one embodiment, the mounting frame 31 includes a bracket 311 and a fixing plate 313. The bracket 311 is connected to the lifting drive 32. A support plate 312 is protruding from the bracket 311. The edge of the light-transmitting plate 10 overlaps the support plate 312. The fixing plate 313 is positioned on the side of the light-transmitting plate 10 facing away from the probe row. The fixing plate 313 is provided with a threaded connector (not shown) that is threadedly connected to the support plate 312. This allows the fixing plate 313 and the support plate 312 to clamp the light-transmitting plate 10 from both sides, thereby improving the installation stability of the light-transmitting plate 10. Furthermore, when the light-transmitting plate 10 needs to be replaced or maintained, the light-transmitting plate 10 can be removed by simply removing the threaded connector from the fixing plate 313, which simplifies operation and improves maintenance efficiency.

[0059] Furthermore, a positioning groove 314 is provided on the side of the support plate 312 facing away from the probe row, and the edge of the light-transmitting plate 10 is arranged in the positioning groove 314. Specifically, the positioning groove 314 forms a step structure on the support plate 312, and the side of the light-transmitting plate 10 abuts against the side of the step structure, thereby realizing the positioning of the light-transmitting plate 10 and ensuring the accuracy of the placement of the light-transmitting plate 10. Furthermore, the side surface of the light-transmitting plate 10 facing away from the probe row is flush with the side surface of the support plate 312 facing away from the probe row, thereby ensuring that after the fixing plate 313 is connected to the side surface of the support plate 312 facing away from the probe row, the fixing plate 313 can fit the side surface of the light-transmitting plate 10 facing away from the probe row, thereby improving the clamping stability of the fixing plate 313 and the support plate on the light-transmitting plate 10.

[0060] Optionally, in one embodiment, there are two mounting brackets 31, which are arranged opposite to each other and respectively connected to the two side edges of the light-transmitting plate 10, and the lifting drive member 32 is used to drive the two mounting brackets 31 to move synchronously, thereby ensuring smooth movement of the light-transmitting mechanism.

[0061] See also Figure 4 The cell testing device also includes a standard cell 41, which is arranged between the light-transmitting plate 10 and the probe row, and the projection of the light-transmitting plate 10 in the first direction covers the standard cell 41. Specifically, when performing an IV test, the IV data of the cell 50 to be tested cannot be directly tested. Usually, it is necessary to reversely infer the IV data of the cell 50 to be tested through the test structure of the standard cell 41. By arranging the standard cell 41 between the light-transmitting plate 10 and the probe row, and making the projection of the light-transmitting plate 10 in the first direction cover the standard cell 41, it is ensured that the test environment of the standard cell 41 is consistent with that of the cell 50 to be tested, thereby further improving the accuracy of the test results.

[0062] Optionally, in one embodiment, the cell testing apparatus may further include a support frame 42, on which the standard cell 41 is mounted. Furthermore, the area of ​​the standard cell 41 is smaller than the area of ​​the cell to be tested 50, thereby preventing the standard cell 41 from occupying too much space and reducing testing costs.

[0063] Optionally, in one embodiment, the light-transmitting plate 10 is a glass plate. Specifically, the traditional light-transmitting plate 10 is mostly a composite plate made of ordinary white glass and transparent acrylic bonded together with glue. The overall thickness of the composite plate is generally greater than 10 mm. The thicker the plate, the worse the light transmittance, which seriously affects the accuracy of the test results. At the same time, since the battery cells will generate heat during the test, and the acrylic plate in contact with the battery cell 50 to be tested has a poor heat dissipation effect, it is easy to cause the temperature of the battery cell to rise, further affecting the test results. In addition, when the glass plate and the acrylic plate are bonded, they must be flat and no steam drums or various textures should appear. The process is relatively complicated and the cost is high. Moreover, the texture of acrylic is relatively soft and easily scratched by debris. During the test, the scratched acrylic plate is in direct contact with the battery cell 50 to be tested, which will affect the EL imaging of the camera, thereby causing misjudgment of the test results. In addition, the scratched composite plate can only be scrapped, resulting in increased spare parts costs. In the present application, the light-transmitting plate 10 is configured as a pure glass plate, which has good light transmittance and thermal conductivity and high strength, effectively avoiding various problems that affect the accuracy of test results caused by the traditional use of composite plates.

[0064] Furthermore, the thickness of the glass plate is 5mm-10mm. When the glass plate is thicker than 10mm, the light transmittance of the glass plate is poor, affecting the accuracy of the IV test. When the glass plate is thinner than 5mm, the glass plate is insufficiently strong and easily breaks. By configuring the glass plate thickness to 5mm-10mm, the strength of the glass plate is ensured while the glass plate has a higher light transmittance, thereby improving the test accuracy. For example, in one embodiment, the light transmittance of the glass plate is greater than or equal to 98%, that is, the glass plate is made of high-transmittance glass, thereby further improving the test accuracy.

[0065] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A battery cell testing device, characterized in that: include: Probe row; A light-transmitting plate (10), wherein the light-transmitting plate (10) is arranged opposite to the probe row in a first direction, at least one test station for placing a battery cell (50) to be tested is provided between the light-transmitting plate (10) and the probe row, the projection of the light-transmitting plate (10) in the first direction covers the test station, the light-transmitting plate (10) is further provided with an air path (20), the air path (20) includes a main path (21) and at least one branch path (22), the main path (21) is connected to an air inlet interface (23), the projection of the main path (21) in the first direction does not overlap with the test station; one end of the branch path (22) is connected to the main path (21), the projection of the other end of the branch path (22) in the first direction falls into the edge area of ​​the test station, and an air outlet is provided on the portion of the branch path (22) projected to fall into the test station, and the air outlet passes through a side of the light-transmitting plate (10) close to the probe row; and A lifting mechanism (30) is connected to the probe row and / or the light-transmitting plate (10), and the lifting mechanism (30) is used to drive the probe row and the light-transmitting plate (10) to move toward or away from each other.

2. The cell testing device according to claim 1, wherein: A plurality of test stations are formed between the light-transmitting plate (10) and the probe row, and the test stations are arranged at intervals along a second direction intersecting the first direction.

3. The cell testing device according to claim 2, characterized in that: The main road (21) includes: a first main pipe (211), wherein a projection of the first main pipe (211) in the first direction is located on one side of the test station, and the first main pipe (211) extends along the second direction, a plurality of branches (22) are connected to the first main pipe (211), the branches (22) on the first main pipe (211) are arranged at intervals along the second direction, and the projections of one end of each branch (22) in the first direction fall one by one into an edge area on one side of the test station; a second main pipe (212), a projection of the second main pipe (212) in the first direction being located on the other side of the test station, and the second main pipe (212) extending along the second direction, a plurality of the branches (22) being connected to the second main pipe (212), the branches (22) on the second main pipe (212) being arranged at intervals along the second direction, and projections of one end of each branch (22) in the first direction falling one by one into an edge region on the other side of the test station; and A connecting pipe (213), wherein a projection of the connecting pipe (213) in the first direction is located between two adjacent test stations and connects the first main pipe (211) and the second main pipe (212).

4. The cell testing device according to claim 3, characterized in that: One end of the air inlet interface (23) is connected to the first main pipe (211) or the second main pipe (212) or the connecting pipe (213), and the other end of the air inlet interface (23) passes through a side of the light-transmitting plate (10) away from the probe row.

5. The cell testing device according to claim 1, wherein: The lifting mechanism (30) comprises: a mounting frame (31), the mounting frame (31) being connected to an edge of the light-transmitting plate (10); and A lifting drive member (32) is connected to the mounting frame (31), and the lifting drive member (32) is used to drive the mounting frame (31) and the probe row to move toward or away from each other.

6. The cell testing device according to claim 5, characterized in that: The mounting frame (31) comprises: a bracket (311), the bracket (311) being connected to the lifting drive member (32), the bracket (311) being provided with a support plate (312) protruding therefrom, and the edge of the light-transmitting plate (10) being overlapped on the support plate (312); and A fixing plate (313) is provided on a side of the light-transmitting plate (10) away from the probe row, and a threaded connector is provided on the fixing plate (313), and the threaded connector is threadedly connected to the support plate (312).

7. The cell testing device according to claim 6, characterized in that: A positioning groove (314) is provided on the side of the support plate (312) facing away from the probe row, an edge of the light-transmitting plate (10) is arranged in the positioning groove (314), and a surface of the side of the light-transmitting plate (10) facing away from the probe row is flush with a surface of the side of the support plate (312) facing away from the probe row.

8. The cell testing device according to claim 1, wherein: The cell testing device further comprises a standard cell (41), wherein the standard cell (41) is arranged between the light-transmitting plate (10) and the probe row, and the projection of the light-transmitting plate (10) in the first direction covers the standard cell (41).

9. The cell testing device according to any one of claims 1 to 8, characterized in that: The light-transmitting plate (10) is a glass plate.

10. The cell testing device according to claim 9, characterized in that: The thickness of the glass plate is 5 mm to 10 mm; and / or the light transmittance of the glass plate is greater than or equal to 98%.

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