Battery piece double-face testing device

Abstract

The embodiment of the utility model provides a battery piece double-face testing device. The battery piece double-face testing device comprises a testing instrument; the first probe disc comprises a first disc body and a plurality of first probes which are distributed on the first disc body in an array mode, and the first probes are electrically connected with the testing instrument through first connecting lines; the second probe disc comprises a second disc body and a plurality of second probes which are distributed on the second disc body in an array mode, and the second probes are electrically connected with the testing instrument through second connecting lines; the first probe and the second probe are used for jointly clamping the battery piece in the thickness direction of the battery piece, and the first probe and the second probe can be electrically connected with a front grid line and a back grid line of the battery piece respectively. According to the battery piece double-face testing device, the battery piece does not need to be turned over, double-face electrical performance testing of the battery piece can be completed only by changing the corresponding connecting lines, and the double-face testing efficiency of the battery piece can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solar cell testing, in particular to a double-side testing device for cell piece. BACKGROUND

[0002] The existing cell piece testing device adopts a single-side vacuum adsorption structure. When the electrical performance of a double-side cell is tested, the cell needs to be turned over after testing one side, so that the other side can be tested. The testing efficiency is low. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a double-side testing device for cell piece, so as to solve the problem of low electrical performance testing efficiency of double-side cell in the prior art.

[0004] The present application provides a double-side testing device for cell piece, comprising: a testing instrument; a first probe disc comprising a first disc body and a plurality of first probes arranged in an array on the first disc body, the first probes being electrically connected to the testing instrument through first connecting lines; a second probe disc comprising a second disc body and a plurality of second probes arranged in an array on the second disc body, the second probes being electrically connected to the testing instrument through second connecting lines; the first probes and the second probes are used for jointly clamping the cell piece along the thickness direction of the cell piece, and the first probes and the second probes can form electrical connections with the front side grid lines and the back side grid lines of the cell piece respectively.

[0005] In a possible implementation, a projection of the first disc body in the height direction of the double-side testing device for cell piece completely coincides with a projection of the second disc body in the height direction of the double-side testing device for cell piece.

[0006] In a possible implementation, in the height direction of the double-side testing device for cell piece, the positions of the plurality of first probes correspond to the positions of the plurality of second probes one by one.

[0007] In a possible implementation, the first disc body comprises a plurality of first hollow parts and a plurality of first mounting parts arranged alternately, the first probes being fixed to the first mounting parts; the second disc body comprises a plurality of second hollow parts and a plurality of second mounting parts arranged alternately, the second probes being fixed to the second mounting parts; in the height direction of the double-side testing device for cell piece, the positions of the plurality of first hollow parts correspond to the positions of the plurality of second hollow parts one by one.

[0008] In a possible implementation, the extension directions of the first mounting parts and the second mounting parts are parallel to the extension directions of the grid lines of the cell piece; the plurality of first probes are distributed at intervals in the extension direction of the first mounting parts; the plurality of second probes are distributed at intervals in the extension direction of the second mounting parts.

[0009] In a possible implementation, the battery piece double-side testing device further comprises a lifting mechanism, configured to drive the first probe disc to move along a height direction of the battery piece double-side testing device, so as to make the first probe close to or away from the second probe.

[0010] In a possible implementation, the battery piece double-side testing device further comprises a first support plate and a second support plate, the first disc body is fixedly connected with the first support plate, and the second disc body is fixedly connected with the second support plate; the lifting mechanism is connected with the first support plate and is configured to drive the first support plate to move relative to the second support plate along the height direction of the battery piece double-side testing device.

[0011] In a possible implementation, the second support plate is fixedly installed with a guide shaft extending along the height direction of the battery piece double-side testing device; and the first support plate is fixedly installed with a shaft sleeve configured to slide with the guide shaft when the first support plate moves relative to the second support plate.

[0012] In a possible implementation, the second probe disc further comprises a first limiting component and a second limiting component; the first limiting component is installed at at least one end of the second disc body along a first direction, and is configured to abut against an edge of a battery piece along the first direction; the second limiting component is installed at at least one end of the second disc body along a second direction, and is configured to abut against the edge of the battery piece along the second direction; and the first direction is perpendicular to the second direction.

[0013] In a possible implementation, the first limiting component comprises a first fixed block and a first limiting rod, the first fixed block is fixedly connected with the second disc body, and the first limiting rod is adjustably installed in the first fixed block along the first direction, and is configured to abut against the edge of the battery piece; and / or, the second limiting component comprises a second fixed block and a second limiting rod, the second fixed block is fixedly connected with the second disc body, and the second limiting rod is adjustably installed in the second fixed block along the second direction, and is configured to abut against the edge of the battery piece.

[0014] In the present application, the battery piece double-side testing device provided in the present application does not need to turn over the battery piece, but only needs to change the corresponding connecting line to complete the double-side electrical performance test of the battery piece, thereby improving the double-side test efficiency of the battery piece. Moreover, the battery piece is clamped and fixed by the first probe and the second probe, and does not need to be provided with a suction device, thereby simplifying the structure of the testing device.

[0015] It should be understood that the above general description and the following detailed description are only exemplary, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0017] Figure 1 The structural schematic diagram of the battery piece double-sided testing device provided by the present application is shown in the figure.

[0018] Figure 2 The front view of the battery piece double-sided testing device in Figure 1

[0019] Figure 3 The structural schematic diagram of the first probe disc and the second probe disc in Figure 1

[0020] Figure 4 The structural schematic diagram of the second disc body in Figure 2

[0021] Reference signs;

[0022] 10-battery piece;

[0023] 20-support;

[0024] 1-first probe disc;

[0025] 11-first disc body;

[0026] 111-first hollow part;

[0027] 112-first mounting part;

[0028] 12-first probe;

[0029] 2-second probe disc;

[0030] 21-second disc body;

[0031] 211-second hollow part;

[0032] 212-second mounting part;

[0033] 22-second probe;

[0034] 3-lifting mechanism;

[0035] 4-first support plate; ​​​

[0036] 5-Second support plate;

[0037] 6-Guide shaft;

[0038] 7-Sleeve;

[0039] 8-First limiting assembly;

[0040] 81-First fixing block;

[0041] 82-First limiting rod;

[0042] 9-Second limiting assembly;

[0043] 91-Second fixing block;

[0044] 92-Second limiting rod. DETAILED DESCRIPTION

[0045] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the drawings.

[0046] It should be clear that the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0047] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0048] It should be understood that the term "and / or" used herein only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0049] The embodiments of the present application provide a battery piece double-sided testing device for testing the electrical performance of double-sided battery pieces. As shown in FIG. 1, the double-sided testing device comprises a base 1, a first support plate 5, a second support plate 6, a first limiting assembly 8, a second limiting assembly 9, a first limiting rod 82 and a second limiting rod 92. Figure 1As shown, the battery piece double-side testing device includes a testing instrument (not shown in the figure), a first probe disc 1 and a second probe disc 2. The first probe disc 1 is located above the second probe disc 2 along the height direction Z of the battery piece double-side testing device. The first probe disc 1 includes a first disc body 11 and a plurality of first probes 12 arranged in an array on the first disc body 11. The first probes 12 are electrically connected to the testing instrument through first connecting lines (not shown in the figure). The second probe disc 2 includes a second disc body 21 and a plurality of second probes 22 arranged in an array on the second disc body 21. The second probes 22 are electrically connected to the testing instrument through second connecting lines (not shown in the figure). As shown in the figure, Figure 2 As shown, when the battery piece 10 is detected, the first probes 12 and the second probes 22 are used to jointly clamp the battery piece 10 along the thickness direction Z of the battery piece 10. One of the first probes 12 and the second probes 22 can form an electrical connection with the front side grid lines of the battery piece 10, and the other can form an electrical connection with the back side grid lines of the battery piece 10.

[0050] The embodiments of the present application take the example of placing the front side of the battery piece 10 towards the first probe disc 1 and the back side of the battery piece 10 towards the second probe disc 2. The first probes 12 are used to form an electrical connection with the front side grid lines of the battery piece 10, so that the testing instrument can detect the electrical performance data (such as short-circuit current Isc, open-circuit voltage Voc, fill factor FF, conversion efficiency Eff, etc.) of the front side of the battery piece 10 through the first connecting lines. The second probes 22 are used to form an electrical connection with the back side grid lines of the battery piece 10, so that the testing instrument can detect the electrical performance data of the back side of the battery piece 10 through the second connecting lines. The first connecting lines and the second connecting lines are respectively independently connected to the testing instrument. When the electrical performance of the front side of the battery piece 10 needs to be detected, only the first connecting lines need to be electrically connected to the testing instrument. When the electrical performance of the back side of the battery piece 10 needs to be detected, only the second connecting lines need to be electrically connected to the testing instrument. Therefore, the battery piece double-side testing device provided by the present application does not need to turn over the battery piece 10, but only needs to change the corresponding connecting lines to complete the double-side electrical performance test of the battery piece 10, which can improve the double-side test efficiency of the battery piece 10. Moreover, the battery piece 10 is clamped and fixed by the first probes 12 and the second probes 22, and does not need to be provided with a suction device, so that the structure of the battery piece double-side testing device can be simplified.

[0051] Among them, the first disc body 11 and the second disc body 21 are both insulating materials that do not conduct electricity. The first probes 12 are fixedly installed on the first disc body 11 and then electrically connected to the first connecting lines through aluminum strips. The second probes 22 are fixedly installed on the second disc body 21 and then electrically connected to the second connecting lines through aluminum strips.

[0052] As shown in the figure, Figure 3As shown, the first disc body 11 includes a plurality of first hollow parts 111 and a plurality of first mounting parts 112, the first hollow parts 111 are used for light transmission, and a light source can be arranged above the first probe disc 1. The first probes 12 are fixed to the first mounting parts 112, the extension direction of the first mounting parts 112 is parallel to the extension direction of the grid lines of the battery sheet 10, and along the height direction Z of the battery sheet double-sided testing device, the position of the first mounting parts 112 should be aligned with the position of the front surface grid lines of the battery sheet 10. A plurality of first probes 12 are distributed at intervals in the extension direction of the first mounting parts 112, so that the first probes 12 can correspond to the position of the front surface grid lines of the battery sheet 10, and each front surface grid line can form an electrical connection with a plurality of first probes 12, realizing multi-point detection during the detection process, which is beneficial to improve the effectiveness and accuracy of the front surface test results of the battery sheet 10 and reduce the error of the front surface test results. The second disc body 21 includes a plurality of second hollow parts 211 and a plurality of second mounting parts 212, the second hollow parts 211 are used for light transmission, and a light source can be arranged below the second probe disc 2. The second probes 22 are fixed to the second mounting parts 212, the extension direction of the second mounting parts 212 is parallel to the extension direction of the grid lines of the battery sheet 10, and along the height direction Z of the battery sheet double-sided testing device, the position of the second mounting parts 212 should be aligned with the position of the back surface grid lines of the battery sheet 10. A plurality of second probes 22 are distributed at intervals in the extension direction of the second mounting parts 212, so that the second probes 22 can correspond to the position of the back surface grid lines of the battery sheet 10, and each back surface grid line can form an electrical connection with a plurality of second probes 22, realizing multi-point detection during the detection process, which is beneficial to improve the effectiveness and accuracy of the back surface test results of the battery sheet 10 and reduce the error of the back surface test results.

[0053] It should be noted that the battery sheet 10 can be a main grid battery sheet, accordingly, the extension direction of the first mounting parts 112 and the extension direction of the second mounting parts 212 should be the same as the extension direction of the main grid of the battery sheet 10, and the first probes 12 and the second probes 22 are respectively used to form an electrical connection with the front surface main grid and the back surface main grid of the battery sheet 10. The battery sheet 10 can also be a main grid-free battery sheet, accordingly, the extension direction of the first mounting parts 112 and the extension direction of the second mounting parts 212 should be the same as the extension direction of the auxiliary grid of the battery sheet 10, and the first probes 12 and the second probes 22 are respectively used to form an electrical connection with the front surface auxiliary grid and the back surface auxiliary grid of the battery sheet 10.

[0054] Specifically, the projection of the first disc body 11 on the height direction Z of the battery sheet double-sided testing device completely coincides with the projection of the second disc body 21 on the height direction Z of the battery sheet double-sided testing device, that is, the size and shape of the first disc body 11 are consistent with those of the second disc body 21, and the installation positions are aligned, so that the first disc body 11 and the second disc body 21 can form a symmetrical structure on both sides of the battery sheet 10. Moreover, in the height direction Z of the battery sheet double-sided testing device, the positions of the plurality of first hollow parts 111 and the plurality of second hollow parts 211 correspond one by one, so that the shielding area and the shielding position of the first disc body 11 for the front surface of the battery sheet 10 are consistent with the shielding area and the shielding position of the second disc body 21 for the back surface of the battery sheet 10, the influence of different shielding areas or shielding positions on the double-sided testing result of the battery sheet 10 can be reduced, the error can be reduced, and thus the accuracy of the double-sided testing result of the battery sheet 10 can be improved.

[0055] Further, as shown in Figure 2 , in the height direction Z of the battery sheet double-sided testing device, the positions of the plurality of first probes 12 and the plurality of second probes 22 correspond one by one, so that not only the front surface test point position and the back surface test point position of the battery sheet 10 can be consistent, the error of the double-sided testing result of the battery sheet 10 can be reduced, but also the stress of the battery sheet 10 during the testing process can be uniform, and the stability of the battery sheet 10 can be improved.

[0056] As shown in Figure 2 and Figure 4 , in a specific embodiment, the second probe disc 2 further comprises a first limiting assembly 8 and a second limiting assembly 9. The first limiting assembly 8 is installed at at least one end of the second disc body 21 along the first direction X, and the first limiting assembly 8 is used to abut against the edge of the battery sheet 10 along the first direction X, so as to limit the battery sheet 10 in the first direction X. The second limiting assembly 9 is installed at at least one end of the second disc body 21 along the second direction Y, and the second limiting assembly 9 is used to abut against the edge of the battery sheet 10 along the second direction Y, so as to limit the battery sheet 10 in the second direction Y. Therefore, by arranging the first limiting assembly 8 and the second limiting assembly 9, the battery sheet 10 can be limited in two directions at the same time, so as to improve the stability of the battery sheet 10 during the testing process, reduce the risk of movement of the battery sheet 10, and be beneficial to improving the accuracy of the testing result of the battery sheet 10.

[0057] It should be noted that the first direction X and the second direction Y are perpendicular to each other, and one of the first direction X and the second direction Y is the length direction of the battery sheet 10, and the other is the width direction of the battery sheet 10.

[0058] As shown in Figure 4As shown, two second limiting assemblies 9 can be arranged at intervals along the first direction X, which is conducive to improving the limiting effect of the battery sheet 10 in the second direction Y; similarly, two first limiting assemblies 8 can be arranged at intervals along the second direction Y, which is conducive to improving the limiting effect of the battery sheet 10 in the first direction X.

[0059] Further, as shown in Figure 2 and Figure 4 , the first limiting assembly 8 comprises a first fixed block 81 and a first limiting rod 82. The first fixed block 81 is fixedly connected with the second disc body 21, and the first limiting rod 82 is adjustably positioned along the first direction X on the first fixed block 81. The first limiting rod 82 is used for abutting and cooperating with the edge of the battery sheet 10 along the first direction X, so that the first limiting assembly 8 can be adapted to various battery sheets 10 of different sizes in the first direction X, and the compatibility of the battery sheet double-sided testing device is improved. Specifically, the first limiting rod 82 can be connected with the first fixed rod 81 through a bolt, and a plurality of screw holes can be arranged on the first limiting rod 82 at intervals along the first direction X. When it is necessary to adjust the position of the first limiting rod 82 in the first direction X, only the bolt needs to be connected with different screw holes on the first limiting rod 82.

[0060] Similarly, as shown in Figure 2 and Figure 4 , the second limiting assembly 9 comprises a second fixed block 91 and a second limiting rod 92. The second fixed block 91 is fixedly connected with the second disc body 21, and the second limiting rod 92 is adjustably positioned along the second direction Y on the second fixed block 91. The second limiting rod 92 is used for abutting and cooperating with the edge of the battery sheet 10 along the second direction Y, so that the second limiting assembly 9 can be adapted to various battery sheets 10 of different sizes in the second direction Y, and the compatibility of the battery sheet double-sided testing device is improved. Specifically, the second limiting rod 92 can be connected with the second fixed rod 91 through a bolt, and a plurality of screw holes can be arranged on the second limiting rod 92 at intervals along the second direction Y. When it is necessary to adjust the position of the second limiting rod 92 in the second direction Y, only the bolt needs to be connected with different screw holes on the second limiting rod 92.

[0061] In a specific embodiment, as shown in Figure 1 and Figure 2As shown in the figures, the battery sheet double-sided testing device further comprises a support 20, a first bracket plate 4 and a second bracket plate 5. The support 20 is fixed at the bottom of the second bracket plate 5, and the first bracket plate 4 is adjustably installed above the second bracket plate 5. The first bracket plate 4 is a hollow metal plate, and the first disc body 11 is fixedly connected with the edge of the hollow part of the first bracket plate 4 and transmits light through the hollow part to avoid the first bracket plate 4 from blocking the battery sheet 10. Similarly, the second bracket plate 5 is a hollow metal plate, and the second disc body 21 is fixedly connected with the edge of the hollow part of the second bracket plate 5 and transmits light through the hollow part to avoid the second bracket plate 5 from blocking the battery sheet 10. In this embodiment, the support 20 is used to support the first bracket plate 4, the first bracket plate 4 is used to install the first probe disc 1 and can improve the structural strength of the first probe disc 1, and the second bracket plate 5 is used to install the second probe disc 2 and can improve the structural strength of the second probe disc 2.

[0062] In a specific embodiment, as shown in Figure 1 and Figure 2 , the battery sheet double-sided testing device further comprises a lifting mechanism 3. The lifting mechanism 3 is connected with the first bracket plate 4 and is used to drive the first bracket plate 4 to move along the height direction Z of the battery sheet double-sided testing device, so as to adjust the height of the first bracket plate 4. The first probe disc 1 fixed on the first bracket plate 4 can move along the height direction Z of the battery sheet double-sided testing device with the first bracket plate 4, so that the first probe 12 approaches or moves away from the second probe 22. Specifically, before placing the battery sheet 10, the first bracket plate 4 can be raised by the lifting mechanism 3 to ensure that the first probe 12 and the second probe 22 have a certain interval in the height direction Z of the battery sheet double-sided testing device, and then the battery sheet 10 is placed on the second probe 22, and the first bracket plate 4 is lowered by the lifting mechanism 3 to make the first probe 12 and the second probe 22 jointly hold the battery sheet 10. The lifting assembly 3 can be a motor-driven assembly or a pneumatic cylinder-driven assembly, or other driving mechanisms, which are not limited in this embodiment.

[0063] As shown in Figure 1 and Figure 2 , along the first direction X and / or along the second direction Y, the lifting mechanism 3 can be arranged on both sides of the first bracket plate 4 to improve the stability of the first bracket plate 4 during lifting and ensure that the first bracket plate 4 can always remain horizontal.

[0064] Further, as shown in Figure 1 and Figure 2As shown, the second support plate 5 is fixedly installed with a guide shaft 6 extending along the height direction Z of the battery piece double-sided testing device, and the first support plate 4 is fixedly installed with a shaft sleeve 7 sleeved on the guide shaft 6 and used for slidingly matching with the guide shaft 6 when the first support plate 4 moves relative to the second support plate 5. The guide shaft 6 and the shaft sleeve 7 slidingly match to guide the movement of the first support plate 4, and the stability of the first support plate 4 in the lifting process can be improved by arranging the guide shaft 6 and the shaft sleeve 7, and the first support plate 4 can be kept in a horizontal state in the lifting process. Specifically, along the first direction X and / or along the second direction Y, the guide shaft 6 can be arranged at both ends of the second support plate 5 respectively, and the corresponding shaft sleeve 7 can be arranged at the corresponding positions of the first support plate 4, so as to further improve the stability of the first support plate 4 in the lifting process. In the embodiment, the guide shaft 6 is arranged at each corner of the second support plate 5, and the shaft sleeve 7 is correspondingly arranged at each corner of the first support plate 4, so as to further ensure that the first support plate 4 is kept in a horizontal state in the lifting process.

[0065] The above only describes the preferred embodiments of the present application and is not used to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery sheet double-sided testing device, characterized in that, The utility model relates to a battery sheet double -sided testing device, which comprises the following: a testing instrument; a first probe disc (1) comprising a first disc body (11) and a plurality of first probes (12) arranged in an array on the first disc body (11), the first probes (12) being electrically connected to the testing instrument through first connecting lines; a second probe disc (2) comprising a second disc body (21) and a plurality of second probes (22) arranged in an array on the second disc body (21), the second probes (22) being electrically connected to the testing instrument through second connecting lines; the first probes (12) and the second probes (22) are used to jointly clamp a battery sheet (10) along the thickness direction of the battery sheet (10), and the first probes (12) and the second probes (22) can form electrical connections with the front side grid lines and the back side grid lines of the battery sheet (10) respectively.

2. The battery sheet dual surface testing device according to claim 1, wherein, the projection of the first disc body (11) in the height direction of the battery sheet double -sided testing device completely coincides with the projection of the second disc body (21) in the height direction of the battery sheet double -sided testing device.

3. The battery sheet dual surface testing device according to claim 1, wherein, in the height direction of the battery sheet double -sided testing device, the positions of the plurality of first probes (12) and the plurality of second probes (22) correspond one by one.

4. The battery sheet dual surface testing device according to claim 1, wherein, the first disc body (11) comprises a plurality of first hollow parts (111) and a plurality of first mounting parts (112) arranged alternately, and the first probes (12) are fixed to the first mounting parts (112); the second disc body (21) comprises a plurality of second hollow parts (211) and a plurality of second mounting parts (212) arranged alternately, and the second probes (22) are fixed to the second mounting parts (212); in the height direction of the battery sheet double -sided testing device, the positions of the plurality of first hollow parts (111) and the plurality of second hollow parts (211) correspond one by one.

5. The battery sheet dual surface testing device according to claim 4, wherein, the extension directions of the first mounting parts (112) and the second mounting parts (212) are parallel to the extension directions of the grid lines of the battery sheet (10); the plurality of first probes (12) are distributed at intervals in the extension direction of the first mounting parts (112); the plurality of second probes (22) are distributed at intervals in the extension direction of the second mounting parts (212).

6. The battery sheet dual surface testing device according to claim 1, wherein, the battery sheet double -sided testing device further comprises a lifting mechanism (3) for driving the first probe disc (1) to move along the height direction of the battery sheet double -sided testing device, so that the first probes (12) are close to or away from the second probes (22).

7. The battery sheet dual surface testing device according to claim 6, wherein, the battery sheet double -sided testing device further comprises a first support plate (4) and a second support plate (5), the first disc body (11) is fixedly connected with the first support plate (4), and the second disc body (21) is fixedly connected with the second support plate (5); the lifting mechanism (3) is connected with the first support plate (4) and is used to drive the first support plate (4) to move relative to the second support plate (5) along the height direction of the battery sheet double -sided testing device.

8. The battery sheet dual surface testing device according to claim 7, wherein, the second support plate (5) is fixedly installed with a guide shaft (6) extending along the height direction of the battery sheet double -sided testing device; The first support plate (4) is fixedly provided with a shaft sleeve (7) for sliding fit with the guide shaft (6) when the first support plate (4) moves relative to the second support plate (5).

9. The battery sheet dual side testing device according to any one of claims 1-8, wherein, The second probe disc (2) further comprises a first limiting assembly (8) and a second limiting assembly (9). The first limiting assembly (8) is installed at at least one end of the second disc body (21) along a first direction, and is used for abutting against the edge of the battery piece (10) along the first direction. The second limiting assembly (9) is installed at at least one end of the second disc body (21) along a second direction, and is used for abutting against the edge of the battery piece (10) along the second direction. The first direction is perpendicular to the second direction.

10. The battery sheet dual-side testing device according to claim 9, wherein, The first limiting assembly (8) comprises a first fixed block (81) and a first limiting rod (82), the first fixed block (81) is fixedly connected with the second disc body (21), and the first limiting rod (82) is adjustably installed at the first fixed block (81) along the first direction, and is used for abutting fit with the edge of the battery piece (10). And / or, the second limiting assembly (9) comprises a second fixed block (91) and a second limiting rod (92), the second fixed block (91) is fixedly connected with the second disc body (21), and the second limiting rod (92) is adjustably installed at the second fixed block (91) along the second direction, and is used for abutting fit with the edge of the battery piece (10).

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