Battery cell open-circuit voltage testing device and battery cell production system

Abstract

The embodiment of the utility model provides a battery cell open-circuit voltage testing device and a battery cell production system. The battery cell open-circuit voltage testing device comprises a base which is provided with a placing table which is used for placing a battery cell; the test assembly is connected to the base, a detection terminal is arranged on one side, close to the placement table, of the test assembly, and the detection terminal is used for being in contact with an electrode of a battery cell; the detection terminal is arranged on the base, the limiting assembly is connected to the base, the limiting assembly is used for limiting the battery cell on the placement table, a positioning plate is arranged on one side, close to the detection terminal, of the limiting assembly, and the detection terminal penetrates through the positioning plate to be in contact with an electrode of the battery cell. According to the embodiment of the invention, the safety and reliability of the cell open-circuit voltage testing device are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of battery production, and particularly relates to a battery open-circuit voltage testing device and a battery production system. BACKGROUND

[0002] In the production process of a lithium battery cell, the measurement of open-circuit voltage is one of the key links to ensure product quality. The open-circuit voltage is a voltage value measured under the condition that the cell is completely unloaded, and this parameter is of great significance for evaluating the performance state of the cell and detecting potential defects.

[0003] At present, the detection of open-circuit voltage is mainly realized through a special testing device, which is provided with a detection terminal for measuring the open-circuit voltage. However, the detection terminal is prone to deviation, which may cause accidental short-circuiting of the positive and negative electrodes of the cell, and thus lead to safety accidents such as short-circuiting of the positive and negative electrodes of the cell, thereby reducing the safety and reliability of the testing device. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a cell open-circuit voltage testing device and a cell production system to solve the problem of low safety and reliability of the existing cell open-circuit voltage testing device.

[0005] In order to solve the above technical problems, the application is implemented as follows:

[0006] In a first aspect, the application discloses a cell open-circuit voltage testing device, which comprises:

[0007] a base provided with a placement table for placing a cell;

[0008] a testing assembly connected to the base, wherein one side of the testing assembly close to the placement table is provided with a detection terminal for contacting the electrode of the cell;

[0009] and a limiting assembly connected to the base, wherein the limiting assembly is used for limiting the cell on the placement table, one side of the limiting assembly close to the detection terminal is provided with a positioning plate, and the detection terminal contacts the electrode of the cell through the positioning plate.

[0010] Optionally, the detection terminal is at least two, and at least one detection terminal contacts the electrode of the cell through the positioning plate.

[0011] Optionally, the positioning plate is provided with a through hole penetrating through the positioning plate, and the detection terminal contacts the electrode of the cell through the through hole.

[0012] Optionally, the through holes are at least two, and the at least two through holes are arranged on the positioning plate in a spaced manner, and each detection terminal passes through the through hole to contact the electrode of the battery cell.

[0013] Optionally, the through hole has an inner surface, and the inner surface has a guide conical surface close to one side of the test assembly.

[0014] Optionally, the limiting assembly includes at least three limiting members, and the at least three limiting members are arranged on the base in a spaced manner, and each limiting member is movably connected to the base along a preset direction, and the limiting member is used for limiting the battery cell in the preset direction, and the preset direction includes a first direction, a second direction and a third direction; wherein the first direction is the length direction of the battery cell, the second direction is the width direction of the battery cell, and the third direction is the height direction of the battery cell.

[0015] The positioning plate is arranged on the limiting member along the third direction, and the test assembly is connected to the limiting member arranged along the second direction.

[0016] Optionally, the limiting member includes a mounting base, a first driving member and a limiting block, the mounting base has a first end and a second end arranged away from each other, the first end is fixedly connected to the base, the second end is connected to the first driving member, the first driving member is connected to the limiting block, and the first driving member is used to drive the limiting block to move along the preset direction to drive the limiting block to contact and limit the battery cell.

[0017] Optionally, the limiting block of the limiting member arranged along the third direction includes a horizontal plate and the positioning plate, the positioning plate is arranged vertically relative to the horizontal plate, the horizontal plate extends along the second direction, and the positioning plate extends along the third direction.

[0018] Optionally, the test assembly includes a second driving member and a probe seat, the second driving member is fixedly connected to the limiting member arranged along the second direction, an output end of the second driving member is connected to the probe seat, the detection terminal is mounted on the probe seat, and the second driving member is used to drive the probe seat to move along the second direction to drive the detection terminal to move.

[0019] Optionally, the first driving member is any one of a driving air cylinder and a driving motor.

[0020] In a second aspect, the application also discloses a battery cell open circuit voltage testing device.

[0021] In the embodiment of the application, the positioning plate is arranged on one side of the limiting assembly close to the detection terminal, the detection terminal passes through the positioning plate to contact the electrode of the battery cell, so that when the detection terminal contacts the electrode, the detection terminal can be fixed through the positioning plate, so that the detection terminal is more stable when contacting the electrode, thereby reducing safety accidents caused by the deviation of the detection terminal, and improving the safety and reliability of the testing device.

[0022] Additional aspects and advantages of the present application will be described in part in the description that follows, and will become apparent from the description that follows, or will be learned through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0024] Figure 1 is a structural schematic diagram of a battery open-circuit voltage testing device according to an embodiment of the application;

[0025] Figure 2 is Figure 1 a top view of the battery open-circuit voltage testing device shown in FIG. 1;

[0026] Figure 3 is a structural schematic diagram of a limiting block according to an embodiment of the application;

[0027] Figure 4 is Figure 3 a cross-sectional schematic diagram of the through hole shown in FIG. 3;

[0028] Figure 5 is a structural schematic diagram of a limiting member according to an embodiment of the application;

[0029] Figure 6 is a structural schematic diagram of another limiting member according to an embodiment of the application;

[0030] Figure 7 is a structural schematic diagram of still another limiting member according to an embodiment of the application.

[0031] Reference signs: 1 - base, 10 - placement table, 2 - testing assembly; 20 - detection terminal; 21 - second driving member; 22 - probe seat; 3 - limiting assembly; 30 - positioning plate; 301 - through hole; 302 - inner surface, 303 - guide conical surface; 31 - limiting member; 310 - first limiting member, 312 - second limiting member; 313 - third limiting member; 304 - mounting base, 305 - first driving member; 306 - limiting block; 3061 - horizontal plate, X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0033] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0034] In the description of the present application, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The present application provides a kind of electric core open circuit voltage testing device, for detecting the open circuit voltage of electric core, below is simply called testing device, the electric core open circuit voltage testing device of the present application is described in detail below in conjunction with the drawings.

[0037] Referring to Figure 1 And Figure 2, it shows a structural schematic diagram of a kind of open-circuit voltage testing device of battery cell described in the application embodiment;The open-circuit voltage testing device of battery cell includes: pedestal 1, the pedestal 1 is equipped with placing table 10, the placing table 10 is used to place battery cell;Test component 2, the test component 2 is connected to the pedestal 1, the test component 2 is equipped with at least two detection terminals 20 on the side close to the placing table 10, and the detection terminal 20 is used to contact with the electrode of battery cell;And limiting component 3, the limiting component 3 is connected to the pedestal 1, and the limiting component 3 is used to limit battery cell on the placing table 10, and the limiting component 3 is equipped with positioning plate 30 on the side close to the detection terminal 20, and at least one detection terminal 20 passes through the positioning plate 30 and contacts with the electrode of the battery cell.

[0038] Specifically, the pedestal 1 is a rigid structure, as shown in Figure 1 It is used to provide a flat mounting platform for the parts on the testing device, and the pedestal 1 is equipped with the placing table 10, which can include a platform plate for placing battery cell and a support for supporting the platform plate. Further, the support can be four support columns, and the four support columns are connected to the platform plate to support the platform plate.

[0039] The test component 2 is equipped with the detection terminal 20, which is used to contact with the electrode of battery cell and is electrically connected with external detection device through electric connecting line, so that the open-circuit voltage of battery cell can be measured through external detection device. Further, the detection terminal 20 is a probe.

[0040] The limiting component 3 is detachably connected to the pedestal 1 and can limit the battery cell on the placing table 10 to fix the battery cell on the placing table 10, so that the positions of the positive and negative electrodes of the battery cell can be fixed, and the detection terminal 20 of the test component can accurately contact with the positive and negative electrodes of the battery cell.

[0041] In the application embodiment, the positioning plate 30 is arranged on the limiting component 3 on the side close to the detection terminal 20, and the detection terminal 20 passes through the positioning plate 30 to contact with the electrode of battery cell. In this way, when the detection terminal 20 contacts with the electrode, the detection terminal 20 can be fixed by the positioning plate 30, so that the detection terminal 20 is more stable when contacting with the electrode, thereby reducing the safety accidents caused by the deviation of the detection terminal 20 and improving the safety and reliability of the testing device.

[0042] Optionally, the detection terminal 20 is at least two, and at least one detection terminal 20 passes through the positioning plate 30 to contact with the electrode of the battery cell.

[0043] In some optional embodiments, the detection terminal 20 can be two, and the two detection terminals 20 are respectively a positive detection terminal and a negative detection terminal, the positive detection terminal is used to contact the positive electrode of the battery cell, and the negative detection terminal is used to contact the negative electrode of the battery cell, and the two detection terminals 20 are respectively electrically connected to the external detection device through the electrical connection line, and then the open circuit voltage of the battery cell is measured through the external detection device. Among the two detection terminals 20, the positive detection terminal can pass through the positioning plate 30 to contact the positive electrode of the battery cell, or the negative detection terminal can pass through the positioning plate 30 to contact the negative electrode of the battery cell, or the positive detection terminal and the negative detection terminal can pass through the positioning plate 30 to respectively contact the positive electrode and the negative electrode of the battery cell. In this way, the positive detection terminal and the negative detection terminal can be separated to contact the positive electrode and the negative electrode of the battery cell, and at least one of the positive detection terminal and the negative detection terminal is fixed by the positioning plate 30, so that the contact between the positive detection terminal or the negative detection terminal and the electrode is more stable, and the safety of the test device is improved.

[0044] In other optional embodiments, the detection terminal can also be three, four, etc. For example, when the detection terminal is three, one can be a positive detection terminal, and the other two can be negative detection terminals. One positive detection terminal and one negative detection terminal can measure one open circuit voltage, and one positive detection terminal and another detection terminal can measure another open circuit voltage. In this way, two open circuit voltages can be measured. By comparing the measurement results of the two open circuit voltages, the failure of the battery cell or the test device can be more easily found.

[0045] Among the three detection terminals 20, at least one detection terminal 20 passes through the positioning plate 30 to contact the electrode of the battery cell. Specifically, the positive detection terminal or the negative detection terminal among the plurality of detection terminals 20 can pass through the positioning plate 30. In this way, the positive detection terminal and the negative detection terminal can be separated, and the positive detection terminal and the negative detection terminal are physically isolated by the positioning plate 30 to prevent them from short-circuiting when contacting the battery cell, thereby reducing the risk of accidental short-circuiting caused by the detection terminal deviation and improving the safety of the test device.

[0046] In some optional embodiments of the present application, the positioning plate 30 is provided with a through hole 301 penetrating through the positioning plate 30, and the detection terminal 20 passes through the through hole 301 to contact the electrode of the battery cell.

[0047] Specifically, the positioning plate 30 is a plate-shaped structure with a certain thickness, which is provided with a through hole 301 corresponding to the position of the detection terminal 20, the through hole 301 penetrates from one side of the positioning plate 30 to the other side, the size and shape of the through hole 301 are matched with the size and shape of the detection terminal 20, which ensures that the detection terminal 20 can pass through the through hole 301 and be connected with the electrode on the battery, and can be moved in the through hole 301. In this embodiment, by providing the through hole 301 on the positioning plate 30, not only a clear guide path is provided for the detection terminal 20, ensuring the consistency and accuracy of the electrode contact point during each test, but also effective isolation between the detection terminals 20 is achieved through the physical structure. In this way, even in the process of frequent test operation or battery replacement, the risk of short circuit of the detection terminal 20 caused by accidental collision or deviation can be greatly reduced, further enhancing the safety of the test device. In addition, the design of the through hole 301 makes the docking step of the detection terminal 20, and the detection terminal 20 can directly pass through the preset through hole 301 to the designated position without tedious multiple adjustments, thereby speeding up the test preparation speed and improving the overall test efficiency.

[0048] It should be noted that the drawings only show that the through hole 301 is circular, but it can also be other shapes and sizes, which can be designed according to the shape and size of the detection terminal 20, and the embodiments of the present application do not make specific selection.

[0049] Optionally, the through hole 301 is at least two, and the at least two through holes 301 are arranged on the positioning plate 30, and each detection terminal 20 passes through the through hole 301 and contacts with the electrode of the battery.

[0050] Specifically, in the design process of the battery, the positive and negative electrode contact points in the battery can be multiple, and the detection terminal 20 can also be multiple, for example, Figure 2 As shown in the figure, the detection terminal 20 of the test assembly 2 is three. In actual application, by providing multiple through holes 301, each detection terminal 20 can be connected with the electrode contact point through the through hole 301, so that each detection terminal 20 can obtain stable support through the corresponding through hole 301, and each detection terminal 20 is separated, thereby further reducing the deviation of the detection terminal 20 caused by external force or improper operation, and further improving the safety of the test device.

[0051] Optionally, the through hole 301 has an inner surface 302, and the inner surface 302 has a guide conical surface 303 close to one side of the test assembly 2. Referring to Figures 3-4 , a schematic view of the through hole 301 on the positioning plate 30 of the embodiment of the present application is shown, as Figure 4As shown, specifically, the diameter of the guide cone surface 303 gradually decreases along the thickness direction of the guide plate. In this embodiment, by setting the guide cone surface 303 near the through hole 301 on the side close to the detection terminal 20, the guide cone surface 303 plays a role in guiding and positioning. During testing, the detection terminal 20 needs to accurately pass through the through hole 301 to contact the electrode of the battery cell. The design of the guide cone surface 303 enables the detection terminal 20 to more easily find the correct entry position when approaching the through hole 301 and smoothly pass through the through hole 301 along the guide of the cone surface, improving the accuracy and stability of the contact between the detection terminal 20 and the electrode of the battery cell, thereby enhancing the precision and reliability of the test. In addition, the guide cone surface 303 helps to reduce the frictional resistance of the detection terminal 20 when passing through the through hole 301. Since the shape of the guide cone surface 303 gradually decreases, the detection terminal 20 gradually adapts to the size of the through hole 301 during the passing process, thereby reducing the frictional resistance caused by size mismatch. This not only helps to protect the detection terminal 20 and the electrode of the battery cell from damage, but also improves the smoothness and efficiency of the testing process.

[0052] In some alternative embodiments, the limiting assembly 3 comprises at least three limiting members 31, the at least three limiting members 31 are arranged at intervals on the base 1, and each limiting member 31 is movably connected to the base 1 along a preset direction, the limiting member 31 is used for limiting the battery cell in a preset direction, the preset direction includes: a first direction X, a second direction Y and a third direction Z; wherein the first direction X is the length direction of the battery cell, the second direction Y is the width direction of the battery cell and the third direction Z is the height direction of the battery cell; the positioning plate 30 is arranged on the limiting member 31 along the third direction Z, and the test assembly 2 is connected to the limiting member 31 arranged along the second direction Y.

[0053] Referring to Figures 5-7 , the structure schematic diagrams of three kinds of limiting members 31 described in the embodiments of the present application are shown.

[0054] For ease of illustration, as Figures 1-7 shown, the length direction of the battery cell is defined as the first direction X, the thickness direction of the battery cell is defined as the second direction Y, and the height direction of the battery cell is defined as the third direction Z. The limiting member 31 arranged on the first direction X is a first limiting member 310, the limiting member 31 arranged on the second direction Y is a second limiting member 312, and the limiting member 31 arranged on the third direction Z is a third limiting member 313. Figure 5 The limiting member 31 shown in Figure 6 The limiting member 31 shown in Figure 7 The limiting member 31 shown in

[0055] The first limiting member 310, the second limiting member 312 and the third limiting member 313 are arranged on the base 1 in a spaced manner, for example, as shown in the figure Figure 1 The first limiting member 310 and the second limiting member 312 are arranged on both sides of the base 1 along the second direction Y, and the third limiting member 313 is arranged on one side of the base 1. In actual application, the arrangement mode of the first limiting member 310, the second limiting member 312 and the third limiting member 313 on the base 1 can be specifically selected according to actual conditions, and the embodiment of the present application does not make specific limitation thereto.

[0056] The limiting assembly 3 includes at least three limiting members 31, which are arranged along the first direction X, the second direction Y and the height respectively. This design allows accurate limiting of the battery cell in different directions, thereby ensuring the stability and accuracy of the battery cell during testing or processing. Each limiting member 31 is movably connected to the base 1 along the preset direction, which means that the position of the limiting member 31 can be flexibly adjusted according to the actual size and shape of the battery cell to adapt to battery cells of different specifications. By arranging the limiting members 31 in different directions, omnidirectional positioning of the battery cell can be achieved. This helps to ensure the position accuracy of the positive and negative electrodes of the battery cell during testing or processing, thereby improving the accuracy and reliability of the test results.

[0057] It should be noted that the limiting member 31 can also be arranged as 4, 5, etc., and the number of limiting members 31 can be specifically selected according to the shape of the battery cell.

[0058] The test assembly 2 is connected to the second limiting member 312, thereby eliminating the need to set up additional mounting members to fix and install the test assembly 2, reducing the cost of the testing device, and directly connecting the test assembly 2 to the second limiting member 312, which can make the test assembly 2 more directly contact with the battery cell, optimize the test process and improve the test efficiency.

[0059] The positioning plate 30 is arranged on the third limiting member 313. Since the second limiting member 312 and the third limiting member 313 are arranged adjacent to each other, when the test assembly 2 is arranged on the second limiting member 312 and the positioning plate 30 is arranged on the third limiting member 313, after the second limiting member 312 and the third limiting member 313 limit the battery cell from the second direction Y and the third direction Z respectively, the detection terminal 20 of the test assembly 2 located on the second limiting assembly 3 can pass through the positioning plate 30 located on the third limiting member 313 to contact the electrode of the battery cell, reducing the safety accidents caused by the deviation of the detection terminal 20 and improving the safety and reliability of the testing device.

[0060] Optionally, the limiting piece 31 comprises a mounting base 304, a first driving piece 305 and a limiting block 306, the mounting base 304 has a first end and a second end arranged away from each other, the first end is fixedly connected to the base 1, the second end is connected to the first driving piece 305, the first driving piece 305 is connected to the limiting block 306, and the first driving piece 305 is used to drive the limiting block 306 to move along the preset direction, so as to drive the limiting block 306 to contact and limit the battery cell.

[0061] Specifically, as shown in Figure 6 and Figure 7 , the mounting base 304 comprises a first end and a second end arranged away from each other along the third direction Z, the first end is detachably fixedly connected to the base 1, and the first end can be connected to the base 1 by bolts, for example. The second end is connected with the first driving piece 305, and the first driving piece 305 has an output end connected to the limiting block 306. Through the movement of the output end of the first driving piece 305 along the preset direction, the limiting block 306 is driven to move along the preset direction relative to the mounting base 304, as shown in the first limiting piece 310, Figure 5 , the first driving piece 305 can drive the limiting block 306 to move along the first direction X, as shown in the second limiting piece 312, Figure 6 , the first driving piece 305 can drive the limiting block 306 to move along the second direction Y, and as shown in the third limiting piece 313, Figure 7 , the first driving piece 305 can drive the limiting block 306 to move along the third direction Z, so as to realize the positioning of the battery cell in three directions.

[0062] It should be noted that the specific shape and size of the limiting block 306 can be set according to actual needs, and the present application does not make specific limitations.

[0063] In the present application, the first driving piece 305 drives the limiting block 306 to move along the preset direction, so that the limiting block 306 can move accurately along the preset direction, contact the battery cell and realize limiting. Further ensure the position accuracy of the battery cell in the test, avoid unnecessary movement or deviation of the battery cell. By adjusting the output of the first driving piece 305, the contact pressure and limiting degree between the limiting block 306 and the battery cell can be flexibly controlled to adapt to the size and shape of different battery cells.

[0064] Optionally, the limiting block 306 of the limiting piece 31 arranged along the third direction Z, the limiting block 306 comprises a horizontal plate 3061 and the positioning plate 30, the positioning plate 30 is arranged vertically relative to the horizontal plate 3061, the horizontal plate 3061 extends along the second direction Y, and the positioning plate 30 extends along the third direction Z.

[0065] Specifically, as shown in Figure 3 shown, a structural schematic view of the limiting block 306 on the third limiting member 313 is shown, the limiting block 306 includes a horizontal plate 3061 and a positioning plate 30, the horizontal plate 3061 and the positioning plate 30 are perpendicular to each other, the horizontal plate 3061 extends along the second direction Y, and then the second limiting plate can be in contact with the surface of the battery cell, thereby limiting the battery cell along the third direction Z by the third limiting member 313, and through the positioning plate 30 extending along the second direction Y, when the detection terminal 20 of the test assembly 2 located on the second limiting member 312 is in contact with the electrode of the battery cell, the positioning plate 30 located on the third limiting member 313 can be passed through, thereby positioning the detection terminal 20 to improve the safety and reliability of the test device.

[0066] In some other optional embodiments, the limiting member can only include the driving member and the limiting block 306, as shown in Figure 5 shown, the first limiting member 310 in the embodiment of the application is shown, the first limiting member 310 only includes the driving member and the limiting block 306, by directly connecting the driving member on the placement table 10, the number of test devices can be reduced, and the cost of the test device can be reduced.

[0067] It should be noted that in addition to the first driving member 305 achieving movement in a predetermined direction on the mounting base 304 of each limiting member, other driving members can be provided to achieve movement of the mounting base 304 to drive the movement of the entire limiting member, for example, as shown in Figure 7 shown, a driving member can also be provided on the third limiting member 313 to achieve movement of the mounting base 304 along the first direction X, thereby achieving movement of the first driving member 305 and the limiting block 306 on the mounting base 304 along the first direction X, and then the position of the third limiting member 313 along the first direction X can be adjusted. The actual situation can be specifically selected and set.

[0068] Optionally, the test assembly 2 includes a second driving member 21 and a probe seat 22, the second driving member 21 is fixedly connected to the limiting member arranged along the second direction Y, the output end of the second driving member 21 is connected to the probe seat 22, the detection terminal 20 is installed on the probe seat 22, and the second driving member 21 is used to drive the probe seat 22 to move along the second direction Y to drive the detection terminal 20 to move.

[0069] Specifically, as shown in Figure 6As shown, the second driving member 21 is connected to the mounting base 304 on the second limiting member 312, and the output end of the second driving member 21 is connected to the probe seat 22, and the detection terminal 20 is mounted on the probe seat 22. The detection terminal 20 on the probe seat 22 is driven by the output end of the second driving member 21 to move along the second direction Y to contact the electrode of the battery cell. Further, the probe seat 22 can include a positive probe seat 22 and a negative probe seat 22. The positive probe seat 22 is used to mount the positive detection terminal 20, and the negative probe seat 22 is used to mount the negative detection terminal 20. The two output ends of the second driving member 21 are respectively connected to the two kinds of probe seats 22. In actual application, the second driving member 21 usually adopts a high-precision and high-response-speed driving motor or driving cylinder, which can quickly respond to the control signal and drive the probe seat 22 to move. Further, the test efficiency is improved, and the test period is shortened. By automatically controlling the movement and positioning of the test assembly 2, the error and uncertainty caused by human operation can be reduced, and the accuracy and reliability of the test result are ensured.

[0070] In some optional embodiments, the first driving member 305 is any one of a driving cylinder and a driving motor.

[0071] The first driving member 305 is any one of a driving cylinder and a driving motor. In actual application, since the driving cylinder has low cost and simple structure, the cost of the test device can be reduced, and the test device is easy to install and maintain. The driving motor has high precision and high response speed, which can realize accurate control of the position of the battery cell and help to improve the accuracy and test efficiency of the test device. When selecting, the specific test requirements, cost budget, working environment and other factors can be considered comprehensively.

[0072] In some optional embodiments, a camera auxiliary system can also be added to the test device. Through the camera auxiliary system, the battery cell positioning, electrode alignment and clear images can be captured at the moment before and after detection. Combined with advanced image recognition and processing algorithms, the camera can automatically identify the battery cell model, electrode position and state, ensure that each battery cell meets the preset standards and requirements before accessing the test terminal, and improve the pass rate and yield of the battery cell.

[0073] In summary, the battery open-circuit voltage test device described in the embodiments of the present application can at least have the following advantages:

[0074] In the embodiments of the present application, the positioning plate 30 is arranged on the limiting assembly 3 close to the detection terminal 20. The detection terminal 20 passes through the positioning plate 30 to contact the electrode of the battery cell. In this way, when the detection terminal 20 contacts the electrode, the detection terminal 20 can be fixed by the positioning plate 30, so that the detection terminal 20 is more stable when contacting the electrode. Further, the safety accidents caused by the deviation of the detection terminal 20 are reduced, and the safety and reliability of the test device are improved.

[0075] The application further provides an electric core production system, which can specifically include the electric core open circuit voltage testing device in any of the above embodiments.

[0076] Specifically, the electric core production system includes a carrying device and a control device, the carrying device is used to place the electric core on the placing table 10 on the base 1, and the control device is connected with the first driving member 305 and the second driving member 21 in the electric core open circuit voltage testing device respectively, when the electric core open circuit voltage testing is needed, the control device controls the first driving member 305 to move along the corresponding direction in the first direction X, the second direction Y and the third direction Z, and then drives the limiting block 306 to move along the corresponding direction, after the limiting block 306 limits the electric core, the control device controls the second driving member 21 to move, and then drives the probe seat 22 to move, so that the detection terminal 20 on the probe seat 22 moves and contacts the positive and negative poles of the electric core, the external detection equipment performs the open circuit voltage testing, and after the testing is completed, the control device controls the first driving member 305 and the second driving member 21 to move, so that the electric core open circuit voltage testing device returns to the initial position.

[0077] It should be noted that in the embodiments of the application, the structure of the electric core open circuit voltage testing device is the same as that of the electric core open circuit voltage testing device in any of the above embodiments, and the beneficial effects are similar, which will not be repeated here.

[0078] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0079] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cell open-circuit voltage testing device, characterized in that, The utility model relates to a battery cell testing device, including: a base (1) provided with a placing table (10) for placing a battery cell; a testing assembly (2) connected to the base (1), the testing assembly (2) being provided with a detection terminal (20) on a side close to the placing table (10), the detection terminal (20) being used to contact an electrode of the battery cell; and a limiting assembly (3) connected to the base (1), the limiting assembly (3) being used to limit the battery cell on the placing table (10), the limiting assembly (3) being provided with a positioning plate (30) on a side close to the detection terminal (20), the detection terminal (20) penetrating through the positioning plate (30) to contact the electrode of the battery cell.

2. The cell open circuit voltage testing apparatus of claim 1, wherein, The detection terminal (20) is at least two, and at least one detection terminal (20) penetrates through the positioning plate (30) to contact the electrode of the battery cell.

3. The cell open circuit voltage testing apparatus according to claim 1 or 2, characterized by, The positioning plate (30) is provided with a through hole (301) penetrating through the positioning plate (30), and the detection terminal (20) penetrates through the through hole (301) to contact the electrode of the battery cell.

4. The cell open circuit voltage testing apparatus of claim 3, wherein, The through hole (301) is at least two, and at least two through holes (301) are arranged on the positioning plate (30) at intervals, and each detection terminal (20) penetrates through the through hole (301) to contact the electrode of the battery cell.

5. The cell open circuit voltage testing apparatus of claim 3, wherein, The through hole (301) has an inner surface (302), and the inner surface (302) has a guide conical surface (303) on a side close to the testing assembly (2).

6. The cell open circuit voltage testing apparatus of claim 1, wherein, The limiting assembly (3) includes at least three limiting pieces (31), at least three limiting pieces (31) are arranged on the base (1) at intervals, and each limiting piece (31) is movably connected to the base (1) in a preset direction, the limiting piece (31) is used for limiting the battery cell in the preset direction, the preset direction includes: a first direction (X), a second direction (Y) and a third direction (Z); wherein the first direction (X) is the length direction of the battery cell, the second direction (Y) is the width direction of the battery cell, and the third direction (Z) is the height direction of the battery cell; The positioning plate (30) is arranged on the limiting piece (31) in the third direction (Z), and the testing assembly (2) is connected to the limiting piece (31) arranged in the second direction (Y).

7. The cell open circuit voltage testing apparatus of claim 6, wherein, The limiting piece (31) includes a mounting base (304), a first driving piece (305) and a limiting block (306), the mounting base (304) has a first end and a second end arranged away from each other, the first end is fixedly connected to the base (1), the second end is connected to the first driving piece (305), the first driving piece (305) is connected to the limiting block (306), and the first driving piece (305) is used to drive the limiting block (306) to move in the preset direction, so that the limiting block (306) contacts the battery cell to limit.

8. The cell open circuit voltage testing apparatus of claim 7, wherein, The limiting block (306) of the limiting member (31) arranged along the third direction (Z) comprises a horizontal plate (3061) and the positioning plate (30), the positioning plate (30) is arranged perpendicularly relative to the horizontal plate (3061), the horizontal plate (3061) extends along the second direction (Y), and the positioning plate (30) extends along the third direction (Z).

9. The cell open circuit voltage testing apparatus of claim 6, wherein, The test assembly (2) comprises a second driving member (21) and a probe seat (22), the second driving member (21) is fixedly connected to the limiting member (31) arranged along the second direction (Y), the output end of the second driving member (21) is connected to the probe seat (22), the detection terminal (20) is mounted on the probe seat (22), and the second driving member (21) is used for driving the probe seat (22) to move along the second direction (Y) to drive the detection terminal (20) to move.

10. An electrode production system, characterized by comprising: The device comprises: The device according to any one of claims 1-9. The device comprises:

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