Tab clamping device for battery cell formation

Abstract

The utility model relates to the technical field of battery cell production, in particular to a tab clamping device for battery cell formation. The tab clamping device for battery cell formation comprises a circuit assembly, a first pressing plate and a second pressing plate, wherein the first pressing plate and the second pressing plate are oppositely arranged and are used for clamping a battery cell; the circuit assembly is arranged on the side, facing the first pressing plate, of the second pressing plate and comprises a voltage line, a current line and a switch part, the first pressing plate can press the tabs of the battery cell on the voltage line and the current line in an abutting mode and trigger the switch part, the switch part is configured to conduct connection of the voltage line and the current line after being triggered, the width of the current line is large, and the current line is arranged on the first pressing plate. The contact between the battery cell and the tab is better, the voltage line and the current line can be reliably and electrically connected with the tab after being conducted, the problem caused by poor contact between the narrow voltage line and the tab is avoided, good contact between the current line and the voltage line and the tab is ensured, and abnormal charging and discharging of the battery cell are avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to a tab clamping device for cell formation. Background Technology

[0002] In the production and testing process of battery cells, it is often necessary to charge and discharge the cells. For example, in the formation and capacity testing processes of battery cells, the electrode clamping device is required to clamp the electrode to charge and discharge the battery cells.

[0003] Specifically, the surface of the electrode clamping device used in cell formation that contacts the electrode has voltage lines and current lines. The voltage lines and current lines are in contact with the electrode; the voltage lines are conductive and primarily responsible for acquiring the electrode voltage signal, while the current lines are conductive and can charge or discharge the cell. The voltage and current lines can be located on the same side of the electrode thickness or on opposite sides of the electrode thickness. The voltage and current lines are not connected. Because the voltage lines are relatively narrow, poor contact with the electrode is likely to occur, affecting the accuracy of cell data acquisition.

[0004] Therefore, there is an urgent need for a tab clamping device for battery cell formation to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a tab clamping device for battery cell formation, which ensures good contact between the current line and the voltage line and the tab, thereby avoiding abnormal charging and discharging of the battery cell.

[0006] To achieve the above objectives, the following technical solution is provided:

[0007] A tab clamping device for battery cell formation, comprising:

[0008] The first and second pressure plates are arranged opposite to each other and are used to clamp the battery cells;

[0009] A circuit assembly is disposed on the side of the second pressure plate facing the first pressure plate. The circuit assembly includes a voltage line, a current line, and a switching element. The first pressure plate can press the electrode of the battery cell against the voltage line and the current line and trigger the switching element. The switching element is configured to conduct the connection between the voltage line and the current line after being triggered.

[0010] As an optional solution, the first pressure plate includes:

[0011] Pressure plate body;

[0012] A pressing member is disposed at the end of the pressure plate body and on the side facing the second pressure plate, the pressing member being used to press against the switch and the electrode tab.

[0013] As an optional solution, the pressure plate body and the pressing member are slidably engaged along the distribution direction of the first pressure plate and the second pressure plate; the first pressure plate further includes an elastic member, one end of which is connected to the pressure plate body and the other end of which is connected to the pressing member.

[0014] As an optional solution, the first pressure plate further includes:

[0015] A guide structure is disposed between the pressure plate body and the pressing member, and is configured to guide the relative movement of the pressing member relative to the pressure plate body.

[0016] As an optional solution, the guiding structure includes:

[0017] The guide member and the guide groove extend along the distribution direction of the first pressure plate and the second pressure plate. One of the pressure plate body and the pressing member is provided with a guide groove. The guide member is provided on the other of the pressure plate body and the pressing member. The guide member is inserted into the guide groove and slides with the guide groove.

[0018] As an optional solution, the guide is disposed on the pressure plate body, and the position of the guide relative to the pressure plate body along the distribution direction of the first pressure plate and the second pressure plate is adjustable.

[0019] As an optional solution, the pressure plate body is provided with a connecting hole, one end of the guide is connected to the connecting hole, and the other end is slidably engaged with the guide groove.

[0020] As an optional solution, the circuit assembly further includes:

[0021] A substrate is provided on which the voltage line and the current line are respectively disposed. A first connecting line and a second connecting line are also disposed on the substrate. The first connecting line is connected to the voltage line, and the second connecting line is connected to the current line. Both the first connecting line and the second connecting line can be connected to the switching element.

[0022] As an optional solution, the following are also included:

[0023] A drive mechanism, connected to the first pressure plate and / or the second pressure plate, is configured to drive at least one of the first pressure plate and the second pressure plate to move toward or away from the other.

[0024] As an optional solution, a first flexible element is provided on the side of the first pressure plate facing the battery cell;

[0025] And / or, the second pressure plate is provided with a second flexible element on the side facing the battery cell.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] The electrode clamping device for battery cell formation provided by this utility model, when the battery cell is clamped by the first pressure plate and the second pressure plate, the first pressure plate triggers the switch to conduct voltage lines and current lines. The current lines are wider, resulting in better contact with the electrode. After the voltage lines and current lines are conducted, they can achieve a reliable electrical connection with the electrode, avoiding problems caused by poor contact between the voltage lines and the electrode due to their narrowness. Both the current lines and voltage lines ensure good contact with the electrode, preventing abnormal charging and discharging of the battery cell. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the electrode clamping device for cell formation provided in this embodiment of the utility model;

[0030] Figure 2 A partial structural schematic diagram of the electrode clamping device for cell formation provided in this embodiment of the utility model;

[0031] Figure 3 for Figure 1 A magnified view of a portion of point A in the middle.

[0032] Figure label:

[0033] 100. Electrode clamping device for battery cell formation;

[0034] 10. First pressure plate; 11. Pressure plate body; 111. Connecting hole; 12. Pressing element; 121. Guide groove; 13. Elastic element;

[0035] 20. Second pressure plate;

[0036] 30. Circuit components; 31. Switching devices; 32. Voltage lines; 33. Current lines; 34. Substrate;

[0037] 200. Battery cell; 210. Electrode. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, 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 possible implementation.

[0044] like Figures 1-3 As shown, this embodiment provides a tab clamping device 100 for battery cell formation, which is used to clamp the battery cell 200 and its tabs 210, and to connect the tabs 210 to the circuit assembly 30. The circuit assembly 30 can be connected to a charging device to charge, discharge or collect the voltage signal of the battery cell 200.

[0045] Specifically, the electrode clamping device 100 for battery cell formation includes a circuit assembly 30, a first pressure plate 10, and a second pressure plate 20. The first pressure plate 10 and the second pressure plate 20 are disposed opposite to each other and are used to clamp the battery cell 200. The circuit assembly 30 is disposed on the side of the second pressure plate 20 facing the first pressure plate 10. The circuit assembly 30 includes a voltage line 32, a current line 33, and a switch 31. The first pressure plate 10 can press the electrode 210 of the battery cell 200 against the voltage line 32 and the current line 33 and trigger the switch 31. The switch 31 is configured to conduct the connection between the voltage line 32 and the current line 33 after being triggered. When the first pressure plate 10 and the second pressure plate 20 clamp the battery cell 200, the first pressure plate 10 triggers the switch 31, which makes the switch 31 conduct voltage line 32 and current line 33. The current line 33 is wider and has better contact with the tab 210. After the voltage line 32 and the current line 33 are connected, they can achieve a reliable electrical connection with the tab 210, avoiding problems caused by poor contact between the voltage line 32 and the tab 210 due to its narrowness. Both the current line 33 and the voltage line 32 ensure good contact with the tab 210, avoiding abnormal charging and discharging of the battery cell 200.

[0046] It is understood that when the first pressure plate 10 and the second pressure plate 20 approach each other and clamp the battery cell 200, the switch 31 is triggered by the first pressure plate 10 to connect the voltage line 32 and the current line 33; when the first pressure plate 10 and the second pressure plate 20 move away from each other, the switch 31 can automatically reset to disconnect the voltage line 32 and the current line 33. It should be noted that the switch 31 is prior art, and any switch 31 capable of achieving the above functions can be used in this embodiment.

[0047] Optionally, the circuit assembly 30 further includes a substrate 34, on which voltage lines 32 and current lines 33 are integrated respectively. A first connecting line and a second connecting line are also integrated on the substrate 34. The first connecting line is connected to the voltage line 32, and the second connecting line is connected to the current line 33. Both the first connecting line and the second connecting line are connected to the switch 31. When the switch 31 is triggered, the switch 31 is connected to the first connecting line and the second connecting line, so that the switch 31 conducts voltage lines 32 and current lines 33.

[0048] Specifically, the substrate 34 can be a PCB board, the current line 33 is used to connect the current input and output lines of the charging device, and the voltage line 32 is used to connect the voltage detection unit of the battery formation device.

[0049] Optionally, the electrode clamping device 100 for cell formation further includes a drive mechanism (not shown in the figure). The output end of the drive mechanism is connected to the first pressure plate 10 and / or the second pressure plate 20, and is configured to drive at least one of the first pressure plate 10 and the second pressure plate 20 to move so that the first pressure plate 10 and the second pressure plate 20 move closer or further away from each other to clamp or release the cell 200, thereby achieving automated clamping or releasing of the cell 200 and saving manpower.

[0050] Optionally, the drive mechanism can be a linear drive mechanism, such as an electric actuator, a pneumatic cylinder, or a hydraulic cylinder, and may also include a rotary motor and a lead screw and nut transmission assembly, or a rotary motor and a gear and rack transmission assembly, as long as it can output reciprocating linear motion.

[0051] In this embodiment, the first pressure plate 10 includes a pressure plate body 11, a pressing member 12, and an elastic member 13. The pressing member 12 is disposed at the end of the pressure plate body 11 and faces the side of the second pressure plate 20. The pressing member 12 is used to press against the switch member 31 and the electrode tab 210.

[0052] The pressure plate body 11 and the pressing member 12 slide together along the distribution direction of the first pressure plate 10 and the second pressure plate 20. One end of the elastic member 13 is connected to the pressure plate body 11, and the other end is connected to the pressing member 12. When the pressing member 12 abuts against the switch member 31 and the electrode 210, the elastic member 13 is compressed. The rebound force of the elastic member 13 enables the pressing member 12 to press the electrode 210 tightly against the voltage line 32 and the current line 33, further preventing poor contact between the electrode 210 and the voltage line 32 and the current line 33. The elastic member 13 can be a compression spring.

[0053] Optionally, the first pressure plate 10 further includes a guide structure, which is disposed between the pressure plate body 11 and the pressing member 12 and is configured to guide the pressing member 12 to move relative to the pressure plate body 11 along the distribution direction of the first pressure plate 10 and the second pressure plate 20, so as to avoid the pressing member 12 from deflecting during the movement and to ensure the accuracy of the elastic force provided by the elastic member 13.

[0054] Optionally, a guide structure is disposed at both ends of the first pressure plate 10 along the width direction of the cell 200, which guides the relative displacement of the pressing member 12 and the pressure plate body 11, further preventing the pressing member 12 from deflecting during movement and improving the positional accuracy during movement. This facilitates uniform force application to the tab 210 and the switch 31 when the pressing member 12 presses on them, further ensuring the reliability of the connection between the tab 310 and the voltage line 32 and current line 33, and ensuring that the switch 31 can be opened in a timely manner.

[0055] In this embodiment, the guiding structure includes a guide member (not shown in the figure) and a guide groove 121. The guide groove 121 extends along the distribution direction of the first pressure plate 10 and the second pressure plate 20. The guide groove 121 is provided on one of the pressure plate body 11 and the pressing member 12. The guide member is provided on the other of the pressure plate body 11 and the pressing member 12. The guide member is inserted into the guide groove 121 and can slide with the guide groove 121 to provide guidance for the pressing member 12.

[0056] In other embodiments, the guide structure includes a guide rail and a slider. The guide rail extends along the distribution direction of the first pressure plate 10 and the second pressure plate 20. The guide rail is provided on one of the pressure plate body 11 and the pressing member 12, and the slider is provided on the other of the pressure plate body 11 and the pressing member 12. The slider slides in cooperation with the guide rail to provide guidance for the pressing member 12.

[0057] Optionally, the pressure plate body 11 is provided with a connecting hole 111, one end of the guide is connected to the connecting hole 111, and the other end is slidably engaged with the guide groove 121. The connection method between the guide and the pressure plate body 11 facilitates the assembly and disassembly of the guide and the pressure plate body 11.

[0058] Optionally, the guide can be a screw or a pin, and the connecting hole 111 can be a pin hole or a threaded hole.

[0059] In this embodiment, the guide is disposed on the pressure plate body 11. The position of the guide relative to the pressure plate body 11 along the distribution direction of the first pressure plate 10 and the second pressure plate 20 is adjustable to adjust the maximum distance that the pressing member 12 moves relative to the pressure plate body 11, thereby adjusting the magnitude of the elastic force applied by the elastic member 13 to the pressing member 12, and thereby adjusting the magnitude of the force applied by the pressing member 12 to the tab 210.

[0060] Optionally, there are multiple connecting holes 111, which are arranged at intervals along the distribution direction of the first pressure plate 10 and the second pressure plate 20. The guide can be connected to any of the connecting holes 111 to adjust the position of the guide relative to the pressure plate body 11 along the thickness direction of the battery cell 200.

[0061] Optionally, the pressure member 12 is made of insulating material to prevent short circuit between the pressure member 12 and the electrode 210, thereby improving safety.

[0062] Optionally, the first pressure plate 10 is provided with a first flexible member on the side facing the battery cell 200; and / or, the second pressure plate 20 is provided with a second flexible member on the side facing the battery cell 200 to avoid damaging the battery cell 200.

[0063] Note that in the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] The above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A tab clamping device for battery cell formation, characterized in that, include: The first pressure plate (10) and the second pressure plate (20) are arranged opposite to each other and are used to clamp the battery cell (200); A circuit assembly (30) is disposed on the side of the second pressure plate (20) facing the first pressure plate (10). The circuit assembly (30) includes a voltage line (32), a current line (33), and a switch (31). The first pressure plate (10) can press the tab (210) of the battery cell (200) against the voltage line (32) and the current line (33) and trigger the switch (31). The switch (31) is configured to conduct the connection between the voltage line (32) and the current line (33) after being triggered.

2. The electrode clamping device for cell formation according to claim 1, characterized in that, The first pressure plate (10) includes: Pressure plate body (11); A pressing member (12) is disposed at the end of the pressure plate body (11) and on the side facing the second pressure plate (20). The pressing member (12) is used to press against the switch member (31) and the electrode (210).

3. The electrode clamping device for cell formation according to claim 2, characterized in that, The pressure plate body (11) and the pressing member (12) are slidably engaged along the distribution direction of the first pressure plate (10) and the second pressure plate (20); the first pressure plate (10) further includes an elastic member (13), one end of the elastic member (13) is connected to the pressure plate body (11), and the other end is connected to the pressing member (12).

4. The electrode clamping device for cell formation according to claim 3, characterized in that, The first pressure plate (10) further includes: A guide structure is disposed between the pressure plate body (11) and the pressing member (12) and configured to guide the relative movement of the pressing member (12) and the pressure plate body (11).

5. The electrode clamping device for cell formation according to claim 4, characterized in that, The guiding structure includes: The guide member and guide groove (121) extend along the distribution direction of the first pressure plate (10) and the second pressure plate (20). The guide groove (121) is provided on one of the pressure plate body (11) and the pressing member (12). The guide member is provided on the other of the pressure plate body (11) and the pressing member (12). The guide member is inserted into the guide groove (121) and slides with the guide groove (121).

6. The electrode clamping device for cell formation according to claim 5, characterized in that, The guide is disposed on the pressure plate body (11), and the position of the guide relative to the pressure plate body (11) along the distribution direction of the first pressure plate (10) and the second pressure plate (20) is adjustable.

7. The electrode clamping device for cell formation according to claim 5, characterized in that, The pressure plate body (11) is provided with a connecting hole (111), one end of the guide is connected in the connecting hole (111), and the other end is slidably engaged with the guide groove (121).

8. The electrode clamping device for cell formation according to any one of claims 1-7, characterized in that, The circuit assembly (30) also includes: The substrate (34) has voltage lines (32) and current lines (33) respectively disposed on the substrate (34). The substrate (34) also has a first connecting line and a second connecting line. The first connecting line is connected to the voltage line (32), and the second connecting line is connected to the current line (33). Both the first connecting line and the second connecting line can be connected to the switch (31).

9. The electrode clamping device for cell formation according to any one of claims 1-7, characterized in that, Also includes: A drive mechanism, connected to the first pressure plate (10) and / or the second pressure plate (20), is configured to drive at least one of the first pressure plate (10) and the second pressure plate (20) to move toward or away from the other.

10. The electrode clamping device for cell formation according to any one of claims 1-7, characterized in that, The first pressure plate (10) has a first flexible member on the side facing the battery cell (200); And / or, the second pressure plate (20) is provided with a second flexible member on the side facing the battery cell (200).

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