Battery cell charging and discharging tooling

Abstract

The application provides a battery cell charging and discharging tool, which comprises a clamping assembly, a plurality of clamping jaws for clamping the circumferential side wall of a battery cell monomer, the battery cell monomer being provided with a plurality of electrode terminals, a plurality of conductive members being insulatedly connected to the clamping assembly, and the plurality of conductive members corresponding to the plurality of electrode terminals one by one; the conductive members can move in the direction of approaching or moving away from the electrode terminals to realize the electrical connection or disconnection between the conductive members and the electrode terminals. The battery cell charging and discharging tool provided by the application can fix the clamping assembly on the battery cell monomer, ensure that the conductive members can form reliable electrical connection with the battery cell monomer, and ensure the safety of the charging and discharging process.

Description

Technical Field

[0001] This application relates to the field of battery cell manufacturing technology, and in particular to a battery cell charging and discharging tooling. Background Technology

[0002] Large cylindrical battery cells offer significant advantages in the electric vehicle sector and are expected to become the optimal solution for mid-to-high-end electric vehicles. Large cylindrical cells exhibit good consistency, high production efficiency, and strong heat dissipation capabilities at the system level. Compared to smaller cylindrical cells, larger cylindrical cells have higher single-cell energy density, requiring fewer cells to form a module. This also improves upon the poor lifespan and complex management issues associated with smaller cylindrical cell modules.

[0003] After assembling multiple large cylindrical cells into a battery pack, some of the cells may have insufficient charge and need to be recharged individually. However, charging the large cylindrical cells fixed in the battery pack is inconvenient because connecting the charging equipment (e.g., a power supply) to the individual cells is not only complicated but also poses safety risks. Utility Model Content

[0004] In view of this, the purpose of this application is to propose a battery cell charging and discharging fixture to at least partially solve the problem of inconvenience in charging large cylindrical battery cells fixed in a battery pack.

[0005] To achieve the above objectives, this application provides a battery cell charging and discharging fixture, comprising: a clamping assembly including multiple grippers for clamping the circumferential sidewalls of a single battery cell; the single battery cell having multiple electrode terminals; and multiple conductive elements insulatedly connected to the clamping assembly, each of the conductive elements corresponding one-to-one with the multiple electrode terminals; the conductive elements being movable in a direction close to or away from the electrode terminals to achieve electrical connection or disconnection between the conductive elements and the electrode terminals.

[0006] Optionally, the conductive element includes an outer end and an inner end disposed on opposite sides of the clamping assembly, the inner end being adapted to make contact with the electrode terminal for electrical connection, and an external device being electrically connected to the conductive element near the outer end.

[0007] Optionally, the conductive element is slidably connected to the clamping assembly, and an elastic element is provided between the inner end and the clamping assembly, the elastic element being adapted to push the inner end to abut against the electrode terminal.

[0008] Optionally, the conductive element is threadedly connected to the clamping assembly; and / or, the end of the electrical connection wire of the external device is connected to a conductive ring, which is fitted onto the conductive element and close to the external end.

[0009] Optionally, the clamping assembly is provided with an adjustment through hole facing the battery cell, the conductive element passes through the adjustment through hole, the end of the conductive element located on the side of the clamping assembly closer to the battery cell is configured as the inner terminal, and the end of the conductive element located on the side of the clamping assembly away from the battery cell is configured as the outer terminal.

[0010] Optionally, the clamping assembly includes a connecting portion, and the plurality of clamps include a first clamp and a second clamp respectively connected to the connecting portion. The first clamp and the second clamp are spaced apart and can move closer or further away from each other to clamp the battery cell between the first clamp and the second clamp or release the battery cell. The conductive element is connected to the connecting portion and is located between the first clamp and the second clamp.

[0011] Optionally, the first gripper is independent of the connecting part, and the first gripper is connected to the end of the connecting part through an adjusting connector, the adjusting connector causing the first gripper to move closer to or away from the second gripper.

[0012] Optionally, the end of the connecting portion near the first gripper is connected to a guide rail, and the first gripper is slidably connected to the guide rail; and / or, the adjusting connector includes a bolt passing through the first gripper.

[0013] Optionally, the second gripper is fixedly connected to the connecting portion.

[0014] Optionally, the battery cell may include a cylindrical battery cell.

[0015] As can be seen from the above description, the battery cell charging and discharging fixture provided in this application can fix the clamping assembly onto the battery cell by clamping the circumferential sidewall of the battery cell with multiple jaws of the clamping assembly. Since the multiple conductive elements connected to the clamping assembly can move towards or away from the electrode terminals, regardless of whether the distance between the electrode terminals of the battery cell and the clamping assembly is large or small, the position of the conductive elements can be adjusted to achieve a reliable electrical connection between the conductive elements and their corresponding electrode terminals. Therefore, the battery cell charging and discharging fixture of this embodiment is applicable to various battery cell specifications.

[0016] Since the conductive components and the clamping assembly are insulated from each other, electrical connection between different conductive components can be prevented after they are electrically connected to their respective electrode terminals.

[0017] Meanwhile, the clamping assembly can limit the movement of multiple conductive components connected to it, preventing the same conductive component from being connected to different electrode terminals simultaneously due to uncontrolled movement of the conductive components, thus avoiding external short circuits in individual battery cells. Furthermore, it ensures a reliable electrical connection between the conductive components and the electrode terminals, guaranteeing safety during the charging and discharging process.

[0018] Furthermore, since the clamping components can be fixed to the individual battery cells, the battery cell charging and discharging fixture of this application can be more flexible in terms of assembly and disassembly, preventing the battery cell charging and discharging fixture from affecting other battery cells around the target battery cell during assembly, disassembly, or use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of cylindrical cells being packaged and assembled in a battery pack.

[0021] Figure 2 This is a schematic diagram of the battery cell charging and discharging fixture of the first structure in this application being fixed on a single battery cell.

[0022] Figure 3 This is a schematic diagram of a cell charging and discharging fixture of the first structure of this application being installed on a single cell fixed inside a battery pack.

[0023] Figure 4 This is a partial cross-sectional schematic diagram of the battery cell charging and discharging fixture of the first structure according to an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the first gripper side of the battery cell charging and discharging fixture according to the first structure of this application embodiment;

[0025] Figure 6 This is a top view of a battery cell charging and discharging fixture with a first structure according to an embodiment of this application.

[0026] Figure 7 This is a schematic diagram of the battery cell charging and discharging fixture of the second structure in this application being fixed on a single battery cell.

[0027] Figure 8 This is a side view of a battery cell charging and discharging fixture with a second structure according to an embodiment of this application.

[0028] Figure 9This is a top view schematic diagram of the battery cell charging and discharging fixture of the second structure according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Clamping assembly; 110. Gripper; 111. First gripper; 112. Second gripper; 120. Connecting part; 121. Adjusting through hole; 130. Adjusting connector; 140. Guide rail;

[0031] 200, Conductive component; 210, First conductive component; 220, Second conductive component; 230, External terminal; 240, Internal terminal;

[0032] 300. Elastic components;

[0033] 2000, Cell unit; 2100, circumferential sidewall; 2200, Electrode terminal; 2210, First electrode terminal; 2220, Second electrode terminal;

[0034] 3000, External device; 3100, Conductive coil;

[0035] 4000, glue; 5000, cylindrical battery cell. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0037] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components described in these embodiments do not limit the scope of this application.

[0038] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0039] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0040] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] Figure 1 A schematic diagram showing the assembly of cylindrical cells in a battery pack is presented.

[0042] like Figure 1 During battery packaging and assembly, a potting process can be used to connect the cylindrical battery cells 5000 to the housing. This not only fixes the cylindrical battery cells 5000 in their predetermined positions within the housing but also ensures insulation between adjacent cylindrical battery cells 5000. However, when it is necessary to recharge the cylindrical battery cells 5000, since most of the cylindrical battery cells 5000 are submerged and fixed by the adhesive 4000, with only the surface of the negative electrode casing and the positive electrode post exposed outside the adhesive 4000, it is difficult to operate using conventional charging and discharging fixtures.

[0043] Specifically, conventional charging and discharging fixtures include a positive alligator clip electrically connected to the positive terminal of the charging device via an electrical connection wire, and a negative alligator clip electrically connected to the negative terminal of the charging device via an electrical connection wire. The positive alligator clip can be used to hold the positive tab of the battery cell, and the negative alligator clip can be used to hold the negative tab of the battery cell. However, the cylindrical battery cell 5000 has a tabless structure, making it difficult for the alligator clip to directly hold the cylindrical battery cell 5000.

[0044] When using conventional charging and discharging fixtures, the positive alligator clips can be used to clamp the tab on the positive terminal side of the cylindrical battery cell 5000. However, since the clamps of the positive alligator clips are entirely made of metal conductors, during charging, when the positive alligator clips are clamping the tab on the positive terminal side, the outer side of the positive alligator clips may come into contact with the negative terminal shell of the cylindrical battery cell 5000, causing an external short circuit in the cylindrical battery cell 5000.

[0045] In addition to the conventional charging and discharging fixtures described above, in some embodiments, a flexible (FPC) low-voltage sampling harness is used to connect the flexible terminal block of the battery pack and the charging and discharging channel of the charging and discharging instrument to enable the charging and discharging operation of the cylindrical cell 5000 in the battery pack.

[0046] However, to ensure charging and discharging safety, flexible low-voltage sampling harnesses are typically equipped with fuses to provide high-current protection. When the current passing through the flexible low-voltage sampling harness exceeds a threshold (e.g., 1A), the fuse blows, stopping the charging and discharging process. Therefore, using flexible low-voltage sampling harnesses to charge and discharge cylindrical cells can only be done with a small current below 1A, resulting in low charging and discharging efficiency and significant limitations on testing procedures.

[0047] To address the aforementioned issues, this embodiment provides a battery cell charging and discharging fixture.

[0048] Figure 2 This diagram shows the first type of battery cell charging and discharging fixture fixed to a single battery cell. Figure 3 A schematic diagram showing the first type of cell charging and discharging fixture installed on a cell 2000 fixed inside a battery pack is shown.

[0049] like Figure 2 and Figure 3 In some embodiments, the battery cell charging and discharging fixture includes: a clamping assembly 100, including multiple grippers 110, which are used to clamp the circumferential sidewall 2100 of the battery cell 2000; the battery cell 2000 is provided with multiple electrode terminals 2200; multiple conductive elements 200 are insulatedly connected to the clamping assembly 100; the multiple conductive elements 200 correspond one-to-one with the multiple electrode terminals 2200, and the conductive elements 200 can move in a direction close to or away from the electrode terminals 2200 to realize the electrical connection or disconnection between the conductive elements 200 and the electrode terminals 2200.

[0050] For example, the gripper 110 may be designed to have two, three or more, depending on factors such as the size or shape of the battery cell 2000.

[0051] For example, the conductive element 200 may include a columnar structure.

[0052] For example, the conductive component 200 can be electrically connected to the terminals or electrical connection lines of the external device 3000 by means of contact connection, welding, adhesive connection (conductive adhesive) or fastener connection. The external device 3000 may include a power supply for charging the battery cell 2000 or a load for discharging the battery cell 2000.

[0053] For example, the conductive element 200 can be electrically connected to the electrode terminal 2200 by means of contact connection or adhesive connection.

[0054] For example, the portions of the clamping assembly 100 that contact the battery cell 2000 and the conductive element 200 are structural components made of insulating material.

[0055] For example, in a battery pack, the individual cell 2000 is positioned along its height direction (e.g., ...). Figure 3 The upper end of the cell (in the Z direction) (hereinafter referred to as the top end of the cell 2000) exposes the glue 4000. The clamping assembly 100 can be clamped near the top end of the cell 2000 and bring the conductive part 200 close to the electrode terminal 2200 for easy connection.

[0056] For example, two adjacent conductive elements 200 may be spatially isolated or an insulating element may be provided between them to ensure insulation between them.

[0057] by Figure 2 Taking the structure and orientation shown as an example, the top of the battery cell 2000 is provided with multiple electrode terminals 2200, including a first electrode terminal 2210 and a second electrode terminal 2220. Correspondingly, the conductive element 200 includes a first conductive element 210 and a second conductive element 220 that are respectively insulated from and connected to the clamping assembly 100. The first conductive element 210 corresponds to the first electrode terminal 2210, and the second conductive element 220 corresponds to the second electrode terminal 2220.

[0058] During installation, multiple grippers 110 clamp the circumferential sidewall 2100 of the battery cell 2000, thereby allowing the battery cell charging and discharging fixture of this embodiment to be stably fixed to the top of the battery cell 2000.

[0059] After the clamping assembly 100 is stably connected to the battery cell 2000, the conductive element 200 can be driven to move along the height direction of the battery cell 2000 toward the electrode terminal 2200 until the first conductive element 210 and the first electrode terminal 2210 are reliably connected, and the second conductive element 220 and the second electrode terminal 2220 are reliably connected.

[0060] Then, the external device 3000 can be connected to the first conductive element 210 and the second conductive element 220. By activating the external device 3000, the battery cell 2000 can be charged or discharged.

[0061] After charging or discharging is complete, the external device 3000 can be turned off, and the conductive element 200 connected to the electrode terminal 2200 can be reversed to move the conductive element 200 away from the electrode terminal 2200, thus disconnecting them. Afterward, the clamping assembly 100 can be removed from the battery cell 2000.

[0062] like Figure 3When the top surface of the first electrode terminal 2210 and the top surface of the second electrode terminal 2220 are not on the same plane, the distances between the two top surfaces and the clamping assembly 100 are also different. In this case, the first conductive element 210 and the second conductive element 220 can be adjusted individually so that the first conductive element 210 is in close contact with the top surface of the first electrode terminal 2210 which is closer to the clamping assembly 100, and the second conductive element 220 is in close contact with the top surface of the second electrode terminal 2220 which is farther from the clamping assembly 100.

[0063] The battery cell charging and discharging fixture provided in this embodiment uses multiple grippers 110 of the clamping assembly 100 to clamp the circumferential sidewall 2100 of the battery cell 2000, thereby fixing the clamping assembly 100 onto the battery cell 2000. Since the multiple conductive elements 200 connected to the clamping assembly 100 can move towards or away from the electrode terminals 2200, regardless of whether the distance between the electrode terminals 2200 of the battery cell 200 and the clamping assembly 100 is large or small, the position of the conductive elements 200 can be adjusted to achieve a reliable electrical connection between the conductive elements 200 and their corresponding electrode terminals 2200. This allows the battery cell charging and discharging fixture of this embodiment to be applicable to various specifications of battery cells 2000.

[0064] Since the conductive element 200 and the clamping assembly 100 are insulated from each other, electrical connection between different conductive elements 200 can be prevented after they are electrically connected to their respective corresponding electrode terminals 2200.

[0065] Meanwhile, the clamping assembly 100 can limit the movement of multiple conductive elements 200 connected to it, preventing the same conductive element 200 from being connected to different electrode terminals 2200 simultaneously due to uncontrolled movement of the conductive elements 200, thus avoiding external short circuits in the battery cell 2000. Furthermore, it can ensure that the conductive elements 200 can form a reliable electrical connection with the electrode terminals 2200, guaranteeing safety during the charging and discharging process.

[0066] Furthermore, since the clamping assembly 100 can be fixed on the battery cell 2000, the battery cell charging and discharging fixture of this embodiment can be more flexible in terms of assembly and disassembly, preventing the battery cell charging and discharging fixture from affecting other battery cells 2000 around the target battery cell 2000 during assembly, disassembly, or use.

[0067] like Figure 2 and Figure 3 In some embodiments, the conductive element 200 includes an outer end 230 and an inner end 240 disposed on opposite sides of the clamping assembly 100. The inner end 240 is adapted to make contact with the electrode terminal 2200 for electrical connection. The external device 3000 is electrically connected to the conductive element 200 near the outer end 230.

[0068] For example, the external device 3000 may be electrically connected to the external terminal 230, or it may be electrically connected to the circumferential sidewall 2100 of the conductive element 200 near the external terminal 230.

[0069] For example, the outer terminal 230 and the inner terminal 240 of the conductive element 200 can be arranged opposite each other along the height direction of the battery cell 2000.

[0070] In this embodiment, the conductive element 200 is electrically connected to the electrode terminal 2200 through the inner terminal 240, which simplifies the connection process between the conductive element 200 and the electrode terminal 2200.

[0071] Meanwhile, the inner terminal 240 and the outer terminal 230 are the two opposite ends of the conductive element 200, and the distance between them can be relatively large. The inner terminal 240 can be located on the side of the clamping assembly 100 closer to the electrode terminal 2200, and the outer terminal 230 can be located on the side of the clamping assembly 100 away from the electrode terminal 2200, that is, the outer terminal 230 is exposed. When the external device 3000 is electrically connected to the conductive element 200 near the outer terminal 230, it can avoid obstruction caused by the battery cell 2000.

[0072] Figure 4 A partial cross-sectional schematic diagram of the battery cell charging and discharging fixture of the first structure is shown.

[0073] like Figure 3 and Figure 4 In some embodiments, the conductive element 200 is slidably connected to the clamping assembly 100, and an elastic element 300 is provided between the inner end 240 and the clamping assembly 100. The elastic element 300 is adapted to push the inner end 240 to abut against the electrode terminal 2200.

[0074] For example, the conductive element 200 can be inserted into the clamping assembly 100 to achieve a sliding connection; or, the clamping assembly 100 can be provided with a slide rail, and the conductive element 200 is slidably connected to the clamping assembly 100 through the slide rail.

[0075] For example, the elastic element 300 may be provided only on one side of the conductive element 200 in the radial direction (the radial direction of the conductive element 200 is perpendicular to its direction of movement), or it may be provided around the conductive element 200.

[0076] For example, the conductive element 200 is a cylindrical structure, and the outer diameter of the part near the inner end 240 is larger than the outer diameter of the other parts of the conductive element 200; the elastic element 300 can be a spring and is fitted on the smaller outer diameter part of the conductive element 200, with one end of the spring abutting against the clamping assembly 100 and the other end abutting against the larger outer diameter part of the conductive element 200.

[0077] by Figure 3 and Figure 4The following explanation uses the structure and orientation shown as an example. After the clamping assembly 100 is fixed to the battery cell 2000, the elastic element 300 is in a compressed state. At this time, the elastic force generated by the elastic element 300 automatically drives the inner terminal 240 away from the clamping assembly 100 until the inner terminal 240 contacts its corresponding electrode terminal 2200 and can no longer move. Throughout the charging and discharging process, the elastic force generated by the elastic element 300 forces the inner terminal 240 to maintain close contact with the electrode terminal 2200, further improving the connection reliability between the conductive element 200 and the electrode terminal 2200.

[0078] Meanwhile, since the elastic element 300 can automatically drive the conductive element 200 to move, the adjustment process of the position of the conductive element 200 can be simplified, making the installation process of the battery cell charging and discharging fixture easier and helping to improve operating efficiency.

[0079] Figure 7 This diagram illustrates the second type of battery cell charging and discharging fixture fixed to a single battery cell. Figure 8 A side view schematic diagram of the battery cell charging and discharging fixture with the second structure is shown.

[0080] like Figure 7 and Figure 8 In some embodiments, the conductive element 200 is threadedly connected to the clamping assembly 100.

[0081] For example, the conductive element 200 can be a bolt or a threaded post.

[0082] For example, Figure 9 A top-view schematic diagram of the second type of battery cell charging and discharging fixture is shown. (See attached diagram.) Figure 8 and Figure 9 When the conductive component 200 is a bolt, the nut can be used as the outer end 230 of the conductive component 200, and the end of the threaded rod can be used as the inner end 240.

[0083] When the conductive component 200 is threadedly connected to the clamping assembly 100, the self-locking characteristic of the threaded connection allows the conductive component 200 to remain in its current position after manual adjustment. Therefore, there is no need to install an auxiliary structure for limiting the conductive component 200, which helps to simplify the structure of the conductive component 200 and reduce the manufacturing cost of the battery cell charging and discharging tooling.

[0084] like Figure 7 and Figure 8 In some embodiments, the end of the electrical connection wire of the external device 3000 is connected to a conductive ring 3100, which is fitted onto the conductive component 200 and is close to the external end 230.

[0085] For example, when the conductive component 200 is a bolt, the nut can cooperate with the clamping assembly 100 to limit the conductive ring 3100, preventing the conductive ring 3100 from falling off the conductive component 200.

[0086] For example, the electrical connection wire of the external device 3000 can be soldered to the conductive coil 3100.

[0087] The conductive ring 3100, fitted onto the conductive component 200, enables electrical connection between the conductive component 200 and the external device 3000. Furthermore, the process of fitting the conductive ring 3100 onto the conductive component 200 is relatively convenient, which also helps reduce the difficulty of connecting the external device 3000 to the conductive component 200 and facilitates assembly and disassembly.

[0088] like Figure 3 and Figure 4 In some embodiments, the clamping assembly 100 is provided with an adjustment through hole 121 facing the battery cell 2000, and a conductive element 200 passes through the adjustment through hole 121. The end of the conductive element 200 located on the side of the clamping assembly 100 close to the battery cell 2000 is configured as an inner terminal 240, and the end of the conductive element 200 located on the side of the clamping assembly 100 away from the battery cell 2000 is configured as an outer terminal 230.

[0089] For example, one end of the adjustment through hole 121 may be located on the side surface of the clamping assembly 100 near the battery cell 2000, and the other end may be located on the side surface of the clamping assembly 100 away from the battery cell 2000, that is, the adjustment through hole 121 passes through the clamping assembly 100.

[0090] The end of the conductive element 200 located between the clamping assembly 100 and the battery cell 2000 is configured as an inner terminal 240, which facilitates contact connection between the inner terminal 240 and the electrode terminal 2200. The end of the conductive element 200 located away from the battery cell 2000 in the clamping assembly 100 is configured as an outer terminal 230, which allows the outer terminal 230 to protrude from the clamping assembly 100, preventing the clamping assembly 100 from obstructing the outer terminal 230 and facilitating electrical connection between the outer terminal 230 and the external device 3000.

[0091] By inserting the conductive element 200 through the adjustment through hole 121, the conductive element 200 can be effectively limited by the adjustment through hole 121. During the installation and use of the battery cell charging and discharging fixture, the conductive element 200 is further prevented from moving uncontrollably laterally, ensuring that the conductive element 200 can form a reliable connection with the electrode terminal 2200.

[0092] like Figure 3 and Figure 4In some embodiments, the clamping assembly 100 includes a connecting portion 120, and a plurality of grippers 110 including a first gripper 111 and a second gripper 112 respectively connected to the connecting portion 120. The first gripper 111 and the second gripper 112 are spaced apart and can move closer or further away from each other to clamp the battery cell 2000 between the first gripper 111 and the second gripper 112 or to release the battery cell 2000. A conductive element 200 is connected to the connecting portion 120 and is located between the first gripper 111 and the second gripper 112.

[0093] For example, the connection portion 120 may include a plate-like structure, the surface of which is perpendicular to the height direction of the battery cell 2000.

[0094] For example, the first gripper 111 and the second gripper 112 may be respectively disposed at both ends of the connecting portion 120.

[0095] For example, the first gripper 111 and / or the second gripper 112 may be provided with an anti-slip layer on the side near the battery cell 2000.

[0096] For example, the anti-slip layer can be made of an insulating material.

[0097] by Figure 4 The structure and orientation shown are illustrated using the example. The first gripper 111 and the second gripper 112 are along the first direction (the first direction is perpendicular to the height direction of the battery cell 2000, as shown in the example). Figure 4 The first gripper 111 and the second gripper 112 are spaced apart in the X direction, and at least one of them can move along the first direction to make the first gripper 111 and the second gripper 112 move closer to or further away from each other.

[0098] Before clamping the battery cell 2000, the first gripper 111 and the second gripper 112 are driven away from each other along a first direction, so that the dimension between them along the first direction is larger than the dimension of the battery cell 2000. Then, the clamping assembly 100 is moved close to the top of the battery cell 2000, with the first gripper 111 and the second gripper 112 positioned on opposite sides of the battery cell 2000. The first gripper 111 and the second gripper 112 are driven closer together until both abut against the circumferential sidewall 2100 of the battery cell 2000, clamping the battery cell 2000 and ensuring that the clamping assembly 100 is fixed to the battery cell 2000.

[0099] After the battery cell 2000 has finished charging or discharging, the first gripper 111 and the second gripper 112 can be driven to move away from each other until both are separated from the circumferential sidewall 2100 of the battery cell 2000, that is, the battery cell 2000 is released. Then, the clamping assembly 100 can be removed from the battery cell 2000.

[0100] Based on the above process, it can be seen that after the clamping assembly 100 approaches the battery cell 2000, clamping can be achieved by only driving the first jaw 111 and / or the second jaw 112 to move, and the connecting part 120 can remain stationary. Therefore, by placing the conductive element 200 on the connecting part 120 and between the first jaw 111 and the second jaw 112, it is convenient to position the conductive element 200 with its corresponding electrode terminal 2200.

[0101] Figure 5 A schematic diagram of the first gripper 111 side of the battery cell charging and discharging fixture of the first structure is shown.

[0102] like Figure 4 and Figure 5 In some embodiments, the first gripper 111 and the connecting portion 120 are independent of each other, and the first gripper 111 is connected to the end of the connecting portion 120 by adjusting the connecting member 130. The adjusting connecting member 130 drives the first gripper 111 to move closer to or away from the second gripper 112.

[0103] For example, the adjusting connector 130 can be a bolt, a threaded post, or a telescopic rod.

[0104] The movable connection between the first gripper 111 and the connecting part 120 is achieved by adjusting the connector 130, which helps to simplify the structure of the battery cell charging and discharging fixture. At the same time, when clamping the battery cell 2000, it is easier to control the clamping force generated by the gripper 110 on the battery cell 2000, which can prevent the battery cell 2000 from deforming when the clamping assembly 100 clamps the battery cell 2000, thus helping to ensure the appearance quality and safety performance of the battery cell 2000.

[0105] Figure 6 A top-view schematic diagram of the first type of battery cell charging and discharging fixture is shown.

[0106] like Figure 6 In some embodiments, the end of the connecting portion 120 near the first gripper 111 is connected to a guide rail 140, and the first gripper 111 is slidably connected to the guide rail 140.

[0107] For example, guide rail 140 may extend in a first direction.

[0108] For example, one or more guide rails 140 may be provided. When multiple guide rails 140 are provided, they may be located on both sides of the adjusting connector 130 respectively.

[0109] For example, the radial section of the guide rail 140 can be circular, semi-circular, or polygonal.

[0110] The guide rail 140 can limit the movement trajectory of the first gripper 111 and prevent the first gripper 111 from rotating. On the one hand, it facilitates the adjustment of the gap between the first gripper 111 and the connecting part 120. On the other hand, it can also ensure that the clamping force generated by the first gripper 111 and the second gripper 112 on the battery cell 2000 acts on the symmetrical area of ​​the battery cell 2000, which helps to ensure that the clamping assembly 100 and the battery cell 2000 form a stable and reliable connection.

[0111] like Figure 5 In some embodiments, the adjusting connector 130 includes a bolt passing through the first clamp 111.

[0112] If the adjusting connector 130 includes bolts, when clamping the battery cell 2000, after the first jaw 111 and the second jaw 112 move to opposite sides of the battery cell 2000, tightening the bolts will cause the bolt nuts to move the first jaw 111 closer to the circumferential sidewall 2100 of the battery cell 2000 until the first jaw 111 abuts against the circumferential sidewall 2100 of the battery cell 2000, thus achieving clamping of the battery cell 2000 by the clamping assembly 100. Due to the self-locking characteristic of the bolts, the bolts can remain in their current position after manual adjustment. Correspondingly, the first jaw 111, under the limiting action of the nuts, also remains in the position abutting against the battery cell 2000, ensuring a reliable connection between the clamping assembly 100 and the battery cell 2000.

[0113] Using bolts as the adjusting connector 130 can reduce the difficulty of connecting the clamping assembly 100 and the battery cell 2000 and improve the reliability of the connection. On the other hand, it can also reduce the manufacturing cost of the battery cell charging and discharging tooling.

[0114] like Figure 4 In some embodiments, the second gripper 112 is fixedly connected to the connecting portion 120.

[0115] For example, the second gripper 112 can be fixedly connected to the connecting part 120 by means of integral molding connection, welding, plugging, snap-fit ​​or adhesive connection.

[0116] When connecting the clamping assembly 100 and the battery cell 2000, the fixed connection between the second gripper 112 and the connecting part 120 eliminates the need to adjust the second gripper 112, simplifying the connection process between the clamping assembly 100 and the battery cell 2000. Simultaneously, because the second gripper 112 is fixedly connected to the connecting part 120, the connection strength between the two is high, preventing loosening and ensuring a reliable connection between the clamping assembly 100 and the battery cell 2000.

[0117] like Figure 2 In some embodiments, the cell 2000 includes a cylindrical cell 5000.

[0118] If the battery cell 2000 includes a cylindrical battery cell 5000, the positive terminal of the cylindrical battery cell 5000 and the portion of the negative electrode casing surrounding the positive terminal can serve as electrode terminals 2200. Specifically, the positive terminal of the cylindrical battery cell 5000 can serve as a first electrode terminal 2210, and the portion of the negative electrode casing of the cylindrical battery cell 5000 surrounding the positive terminal can serve as a second electrode terminal 2220.

[0119] Since the conductive element 200 can make contact with the surface of the electrode terminal 2200, the aforementioned beneficial effects are more pronounced when applied to a cylindrical battery cell 5000 with a tabless structure. Of course, the battery cell charging and discharging fixture of this embodiment can also be used for prismatic battery cells.

[0120] It should be noted that some embodiments of this application have been described above. Other embodiments are within the scope of the appended claims.

[0121] The various embodiments in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0122] The description in this application is given for illustrative purposes and is not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of this application and to enable those skilled in the art to understand this application and design various embodiments with various modifications suitable for a particular purpose.

[0123] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0124] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0125] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A battery cell charging and discharging fixture, characterized in that, include: The clamping assembly includes multiple jaws for clamping the circumferential sidewalls of individual battery cells; Each battery cell is provided with multiple electrode terminals; Multiple conductive elements are insulatedly connected to the clamping assembly; each conductive element corresponds to a multiple electrode terminal, and the conductive elements can move in a direction close to or away from the electrode terminals to achieve electrical connection or disconnection between the conductive elements and the electrode terminals.

2. The battery cell charging and discharging fixture according to claim 1, characterized in that, The conductive element includes an outer end and an inner end disposed on opposite sides of the clamping assembly. The inner end is adapted to make contact with the electrode terminal for electrical connection, and the external device is electrically connected to the conductive element near the outer end.

3. The battery cell charging and discharging fixture according to claim 2, characterized in that, The conductive element is slidably connected to the clamping assembly, and an elastic element is provided between the inner end and the clamping assembly. The elastic element is adapted to push the inner end to abut against the electrode terminal.

4. The battery cell charging and discharging fixture according to claim 2, characterized in that, The conductive element is threadedly connected to the clamping assembly; and / or The end of the electrical connection cable of the external device is connected to a conductive ring, which is fitted onto the conductive component and is close to the external end.

5. The battery cell charging and discharging fixture according to claim 2, characterized in that, The clamping assembly is provided with an adjustment through hole facing the battery cell, and the conductive element passes through the adjustment through hole. The end of the conductive element located on the side of the clamping assembly closer to the battery cell is configured as the inner terminal, and the end of the conductive element located on the side of the clamping assembly away from the battery cell is configured as the outer terminal.

6. The battery cell charging and discharging fixture according to claim 1, characterized in that, The clamping assembly includes a connecting portion, and the plurality of clamps include a first clamp and a second clamp respectively connected to the connecting portion. The first clamp and the second clamp are spaced apart, and the first clamp and the second clamp can move closer to each other or further away from each other, so as to clamp the battery cell between the first clamp and the second clamp or release the battery cell. The conductive element is connected to the connecting portion and is located between the first gripper and the second gripper.

7. The battery cell charging and discharging fixture according to claim 6, characterized in that, The first gripper is independent of the connecting part, and the first gripper is connected to the end of the connecting part through an adjusting connector. The adjusting connector moves the first gripper closer to or further away from the second gripper.

8. The battery cell charging and discharging fixture according to claim 7, characterized in that, The end of the connecting portion near the first gripper is connected to a guide rail, and the first gripper is slidably connected to the guide rail; and / or, The adjusting connector includes a bolt that passes through the first clamp.

9. The battery cell charging and discharging fixture according to claim 6, characterized in that, The second gripper is fixedly connected to the connecting part.

10. The battery cell charging and discharging fixture according to claim 1, characterized in that, The battery cell includes cylindrical battery cells.

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