A charging tooling for cylindrical battery cells

Abstract

The present application discloses a charging tool for cylindrical battery cells, which relates to the technical field of battery manufacturing, can adapt to the charging test of cylindrical battery cells, saves time, and is safe and reliable. The charging tool for cylindrical battery cells includes a base, a limiting end plate, a positive contact component, a negative contact component, and a carrying component. Among them, the limiting end plate includes a first end plate and a second end plate that are spaced apart on the base. The positive contact component includes a positive contact portion; the negative contact component includes a negative contact portion; the carrying component is fixed on the base and is located between the first end plate and the second end plate; the positive contact component and the negative contact component are arranged on the limiting end plate. When the cylindrical battery cell is located in the accommodation space, at least part of the carrying component is located below the cylindrical battery cell to carry the cylindrical battery cell. The first end plate and the second end plate are respectively located at both ends of the cylindrical battery cell, and the positive contact portion and the negative contact portion are respectively in contact with the positive electrode and the negative electrode of the cylindrical battery cell.

Description

Technical Field

[0001] This application relates to the technical field of battery manufacturing, and particularly to a charging tooling for cylindrical battery cells. Background Art

[0002] During the manufacturing process of cylindrical battery cells, it is necessary to charge the cylindrical battery cells before testing. In related technologies, it is necessary to first weld palladium sheets to the cylindrical battery cells before charging and testing, and then remove the palladium sheets after completing the charging test. Such a solution not only wastes time, but also there is a high probability of palladium sheet residue in the tested cylindrical battery cells, and there are also certain safety risks. Summary of the Invention

[0003] This application provides a charging tooling for cylindrical battery cells, which can adapt to the charging test of cylindrical battery cells, save time, and is safe and reliable.

[0004] The charging tooling for cylindrical battery cells provided by this application includes a base, a limiting end plate, a positive contact assembly, a negative contact assembly, and a bearing assembly. Among them, the limiting end plate includes a first end plate and a second end plate spaced apart on the base, and an accommodation space is formed between the first end plate and the second end plate for accommodating the cylindrical battery cell; the positive contact assembly includes a positive contact portion; the negative contact assembly includes a negative contact portion, and the positive contact portion and the negative contact portion are connected to a power source; the bearing assembly is fixed on the base and is located between the first end plate and the second end plate;

[0005] The positive contact assembly and the negative contact assembly are arranged on the limiting end plate. When the cylindrical battery cell is located in the accommodation space, at least part of the bearing assembly is located below the cylindrical battery cell to bear the cylindrical battery cell, the first end plate and the second end plate are respectively located at both ends of the cylindrical battery cell, and the positive contact portion and the negative contact portion are respectively in contact with the positive electrode and the negative electrode of the cylindrical battery cell to achieve electrical connection.

[0006] The cylindrical battery cell charging tooling provided by the embodiment of the present application includes a base, on which a first end plate and a second end plate are arranged at intervals, and a receiving space is formed between the first end plate and the second end plate. This receiving space can be used to accommodate the cylindrical battery cell to be charged. A positive contact assembly and a negative contact assembly are arranged on the limiting end plate, and the two respectively include a positive contact portion and a negative contact portion. A bearing assembly is further arranged between the first end plate and the second end plate on the base. In this way, the cylindrical battery cell located in the receiving space is limited by the first end plate and the second end plate, and at least part of the bearing assembly is located below the cylindrical battery cell, which can bear the cylindrical battery cell to prevent the displacement of the cylindrical battery cell. And through the positive contact portion and the negative contact portion respectively abutting against the positive electrode and the negative electrode of the cylindrical battery cell, electrical connection is realized. When the positive contact portion and the negative contact portion are connected to a power source, the cylindrical battery cell can be charged and tested. During this process, since the positive contact portion and the negative contact portion arranged on the limiting end plate can directly abut and be electrically connected to the positive electrode and the negative electrode of the cylindrical battery cell, and there is no need to separately weld a palladium sheet to the cylindrical battery cell, the charging operation can be realized for the cylindrical battery cell without any trauma and change through the entire charging tooling. Therefore, time is saved and it is safe and reliable.

[0007] In a possible implementation manner of the present application, the positive contact assembly includes a guide post made of a conductive material. The positive contact portion is located at the first end of the guide post, and a positive electrode wiring portion is arranged at the second end of the guide post. The positive electrode wiring portion is used to connect to a power source. The guide post is slidably arranged relative to the limiting end plate so that the positive contact portion moves along a direction close to or away from the receiving space to abut against or leave the positive electrode of the cylindrical battery cell.

[0008] In a possible implementation manner of the present application, the positive contact assembly further includes a guide sleeve, an elastic member and a clamping gasket. The guide sleeve is fixed on the limiting end plate, the guide post is slidably arranged in the guide sleeve, a flange is arranged on the side of the guide post where the positive contact portion is arranged, and an annular groove is arranged at the second end of the guide post. The elastic member is sleeved on the guide post, the second end of the guide post passes through the guide sleeve, the clamping gasket is cooperatively clamped in the annular groove and abuts against the side of the guide sleeve away from the flange. Along the extending direction of the guide post, one end of the elastic member abuts against the side of the guide sleeve facing the flange, and the other end abuts against the flange and is limited between the guide sleeve and the flange. When the positive contact portion abuts against the positive electrode of the cylindrical battery cell, the elastic member is in an elastically compressed state to provide a holding force towards the positive electrode of the cylindrical battery cell for the guide post.

[0009] In a possible implementation manner of the present application, the limiting end plate is provided with a mounting hole and a positioning hole. The mounting hole penetrates the limiting end plate along the sliding direction of the guide post. The positioning hole is perpendicular to the extending direction of the mounting hole. One end of the positioning hole communicates with the mounting hole, and the other end extends outside the limiting end plate. The guide sleeve is fitted in the mounting hole. The positioning hole is used for mounting a positioning nail to position the guide sleeve located in the mounting hole.

[0010] In a possible implementation manner of the present application, the positive electrode connection part is a positive electrode connection hole arranged on the end face of the second end of the guide post, and the positive electrode connection hole is used for connecting a power source.

[0011] In a possible implementation manner of the present application, the negative electrode contact assembly includes a positioning groove and a contact block. The positioning groove is arranged on the side of the limiting end plate facing the cylindrical battery cell. The contact block is made of a conductive material and includes a negative electrode abutting part embedded in the positioning groove and a negative electrode connection part extending outside the limiting end plate. When the cylindrical battery cell is located in the accommodating space, the negative electrode abutting part abuts and is electrically connected to the negative electrode of the cylindrical battery cell, and the negative electrode connection part is used for connecting to the power source.

[0012] In a possible implementation manner of the present application, both the positioning groove and the contact block are annular structures. The outer contour of the contact block is smaller than the outer contour of the cylindrical battery cell in the radial direction. When the cylindrical battery cell is located in the accommodating space, the negative electrode abutting part abuts and is electrically connected to one end face of the cylindrical battery cell.

[0013] In a possible implementation manner of the present application, the negative electrode connection part is provided with a negative electrode connection hole, and the negative electrode connection hole is used for connecting a power source.

[0014] In a possible implementation manner of the present application, the base is provided with a plurality of fixing holes corresponding to the first end plate and the second end plate. The first end plate and the second end plate are detachably connected to the base through the fixing holes.

[0015] In a possible implementation manner of the present application, the fixing holes corresponding to at least one of the first end plate and the second end plate on the base are long holes, and the long holes are arranged along the extending direction of the cylindrical battery cell.

[0016] In a possible implementation manner of the present application, the bearing assembly includes a carrier, the carrier is detachably connected to the base, the upper surface of the carrier has a bearing arc surface, the radian of the bearing arc surface is not less than the outer contour arc surface of the cylindrical battery cell, and the height of the bearing arc surface does not exceed the center of the cylindrical battery cell.

[0017] In a possible implementation of the present application, the bearing component further includes a limiting body. The lower surface of the limiting body is provided with a limiting arc surface. The radian of the limiting arc surface is not less than the outer contour arc surface of the cylindrical battery cell, and the height of the limiting arc surface does not exceed the center of the cylindrical battery cell. The limiting body is detachably connected above the carrier, and the cylindrical battery cell is limited in the space enclosed by the bearing arc surface and the limiting arc surface.

[0018] In a possible implementation of the present application, the space enclosed by the bearing arc surface and the limiting arc surface is cylindrical and is consistent with the outer contour of the cylindrical battery cell.

[0019] In a possible implementation of the present application, the bearing component further includes a flexible coating, and the flexible coating is arranged on the bearing arc surface and the limiting arc surface. Description of the Drawings

[0020] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0021] Figure 1 is a schematic structural diagram of the charging tooling for cylindrical battery cells provided by the present application;

[0022] Figure 2 is an exploded structural diagram of the charging tooling for cylindrical battery cells provided by the present application;

[0023] Figure 3 is an exploded structural diagram of the positive contact component of the charging tooling for cylindrical battery cells provided by the present application;

[0024] Figure 4 is a schematic structural diagram of the first end plate of the charging tooling for cylindrical battery cells provided by the present application;

[0025] Figure 5 is a schematic structural diagram of the negative contact component and the second end plate of the charging tooling for cylindrical battery cells provided by the present application;

[0026] Figure 6 is a schematic structural diagram of the base of the charging tooling for cylindrical battery cells provided by the present application.

[0027] Description of the Reference Numerals:

[0028] 1 - Base; 11 - Fixed Hole; 2 - Limit End Plate; 21 - First End Plate; 211 - Mounting Hole; 212 - Positioning Hole; 22 - Second End Plate; 3 - Positive Contact Assembly; 31 - Positive Contact Portion; 32 - Guide Post; 321 - Flange; 322 - Annular Groove; 33 - Positive Wiring Portion; 34 - Guide Sleeve; 35 - Elastic Member; 36 - Clamping Gasket; 4 - Negative Contact Assembly; 41 - Negative Contact Portion; 42 - Positioning Groove; 43 - Contact Block; 44 - Negative Wiring Portion; 5 - Carrying Assembly; 51 - Carrier; 511 - Carrying Arc Surface; 52 - Limiting Body; 521 - Limiting Arc Surface. Detailed Implementation Manner

[0029] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description of the specification and the above accompanying drawings are intended to cover non-exclusive inclusion.

[0031] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality" means more than two unless otherwise specifically defined.

[0032] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0033] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0034] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0037] In the manufacturing process of cylindrical battery cells, there are some scenarios where the cylindrical battery cells need to be charged before conducting relevant tests, such as battery charging and discharging, capacity detection, aging, etc. However, in the entire battery production line, the cylindrical battery cells may flow directly to the battery pack process after they are manufactured, and the charging and discharging tests are generally performed after the structure with the palladium sheet is welded after the battery pack is formed, or, when the cylindrical battery cells need to be charged, in order to adapt to the current charging tooling, the palladium sheet needs to be welded to the cylindrical battery cells to charge the battery. That is, at present, there is no tooling that can directly charge cylindrical battery cells without welding palladium sheets to the cylindrical battery cells. Based on this, the present application designs and implements a cylindrical battery cell charging tooling.

[0038] First of all, it should be explained that the cylindrical battery cell charging tooling of the present application can be used in the production line to realize the charging of cylindrical battery cells without palladium sheets in certain scenarios. Among them, the cylindrical battery cell can be a cylindrical battery cell with a relatively fixed morphological structure and a certain positive and negative electrode, including but not limited to cylindrical battery cells with diameters of 18, 21, 26, and 46 mm.

[0039] The cylindrical battery cell charging tool provided by this application refers to Figure 1 and Figure 2 , and includes a base 1, a limiting end plate 2, a positive electrode contact assembly 3, a negative electrode contact assembly 4, and a bearing assembly 5. Among them, the limiting end plate 2 includes a first end plate 21 and a second end plate 22 that are spaced apart on the base 1. An accommodation space is formed between the first end plate 21 and the second end plate 22, and the accommodation space is used to accommodate the cylindrical battery cell; the positive electrode contact assembly 3 includes a positive electrode abutting portion 31; the negative electrode contact assembly 4 includes a negative electrode abutting portion 41, and a power source is connected to the positive electrode abutting portion 31 and the negative electrode abutting portion 41; the bearing assembly 5 is fixed on the base 1 and is located between the first end plate 21 and the second end plate 22; the positive electrode contact assembly 3 and the negative electrode contact assembly 4 are arranged on the limiting end plate 2. When the cylindrical battery cell is located in the accommodation space, at least part of the bearing assembly 5 is located below the cylindrical battery cell to bear the cylindrical battery cell. The first end plate 21 and the second end plate 22 are respectively located at both ends of the cylindrical battery cell, and the positive electrode abutting portion 31 and the negative electrode abutting portion 41 are respectively abutted against the positive electrode and the negative electrode of the cylindrical battery cell to achieve electrical connection.

[0040] In this embodiment, the base 1 is the basic component of the cylindrical battery cell charging tool, which can be a fixed platform, flat plate, etc. and can be relatively fixed. The limiting end plate 2 is a structure arranged on the base 1 for limiting and forming a space for accommodating the cylindrical battery cell. Here, it at least includes the first end plate 21 and the second end plate 22 that are spaced apart to ensure that at least the opposite sides of the cylindrical battery cell are limited. Of course, in some cases, in order to better limit, the limiting end plate 2 can also include a third end plate, a fourth end plate, etc., and the positions of the third end plate and the fourth end plate relative to the first end plate 21 and the second end plate 22 are different, and other sides of the cylindrical battery cell can be limited. The positive electrode contact assembly 3 and the negative electrode contact assembly 4 are two assemblies respectively provided with a positive electrode abutting portion 31 and a negative electrode abutting portion 41. The two can be arranged at the positions corresponding to the positive and negative electrodes of the cylindrical battery cell on the limiting end plate 2. The positive electrode abutting portion 31 and the negative electrode abutting portion 41 are respectively a component in the positive electrode contact assembly 3 and the negative electrode contact assembly 4, and are connected to a power source. And when the cylindrical battery cell is located in the accommodation space, the positive electrode abutting portion 31 and the negative electrode abutting portion 41 are respectively abutted against the positive electrode and the negative electrode of the cylindrical battery cell to achieve electrical connection for charging the cylindrical battery cell.

[0041] In this embodiment, the bearing assembly 5 is a component arranged between the first end plate 21 and the second end plate 22 for bearing the cylindrical battery cell. Since the volume and weight of the power cylindrical battery cell are much larger than those of the conventional cylindrical battery cell, in order to better bear the cylindrical battery cell, the bearing assembly 5 is arranged between the first end plate 21 and the second end plate 22, and the part of the bearing assembly 5 located below the cylindrical battery cell can play the role of bearing the cylindrical battery cell.

[0042] The cylindrical battery cell charging tooling provided by the embodiment of the present application, with reference to Figure 1 and Figure 2 , includes a base 1, on which a first end plate 21 and a second end plate 22 are arranged at intervals, and an accommodation space is formed between the first end plate 21 and the second end plate 22. This accommodation space can be used to accommodate the cylindrical battery cell to be charged. A positive contact assembly 3 and a negative contact assembly 4 are arranged on the limiting end plate 2, and the two respectively include a positive contact portion 31 and a negative contact portion 41. A bearing assembly 5 is also arranged between the first end plate 21 and the second end plate 22 on the base 1. In this way, the cylindrical battery cell located in the accommodation space is limited by the first end plate 21 and the second end plate 22, and at least part of the bearing assembly 5 is located below the cylindrical battery cell, which can bear the cylindrical battery cell to prevent the displacement of the cylindrical battery cell, and realizes electrical connection by the positive contact portion 31 and the negative contact portion 41 respectively abutting against the positive electrode and the negative electrode of the cylindrical battery cell. When the positive contact portion 31 and the negative contact portion 41 are connected to a power source, the charging test of the cylindrical battery cell can be carried out. During this process, since the positive contact portion 31 and the negative contact portion 41 arranged on the limiting end plate 2 can directly abut against and be electrically connected to the positive electrode and the negative electrode of the cylindrical battery cell, there is no need to weld a palladium sheet to the cylindrical battery cell alone. The charging operation of the cylindrical battery cell can be realized through the whole charging tooling without any trauma and change to the cylindrical battery cell. Therefore, time is saved and it is safe and reliable.

[0043] It should be noted that in the cylindrical battery cell charging tooling of the embodiment of the present application, there are many implementation manners for the specific structures of the positive contact assembly 3 and the negative contact assembly 4. For different shapes and structures of the positive and negative electrodes of the cylindrical battery cell, there can be different setting manners. By way of example, the structures of the positive and negative electrodes in the cylindrical battery cell generally include the pole column and the flat plate. The pole column can be provided with a protrusion protruding outside the housing of the cylindrical battery cell to facilitate connection to the corresponding circuit, and the periphery of the protrusion generally needs to be insulated from other positions to avoid short circuit and other phenomena. The flat plate can be that the whole housing is one electrode, or the end cover is one electrode. Among them, when abutting against the pole column, the abutting area is relatively small, and contact with other positions needs to be avoided; the abutting of the flat plate is relatively easy, and a certain flatness needs to be ensured. In the manufacture of the cylindrical battery cell, the pole column is commonly used for the positive electrode, and the flat plate is commonly used for the negative electrode.

[0044] Based on this, for the convenience of description, embodiments of a positive electrode contact component 3 and an embodiment of a negative electrode contact component 4 are shown in the embodiments of the present application. It should be noted that the positive electrode contact component 3 and the negative electrode contact component 4 of the present application are only different terms in a specific structural scenario. In some other scenarios, the positive electrode contact component 3 of the present application may be used to abut against the negative electrode of a cylindrical battery cell, and the negative electrode contact component 4 may be used to abut against the positive electrode of the cylindrical battery cell. The present application is only for the convenience of description here and does not constitute a limitation.

[0045] Exemplarily, in some embodiments of the present application, referring to Figure 1 、 Figure 2 and Figure 3 , the positive electrode contact component 3 includes a guide post 32 made of a conductive material. The positive electrode abutting portion 31 is located at the first end of the guide post 32. The second end of the guide post 32 is provided with a positive electrode connection portion 33, and the positive electrode connection portion 33 is used to connect to a power source. The guide post 32 is slidably arranged relative to the limit end plate 2 so that the positive electrode abutting portion 31 moves in a direction close to or away from the accommodation space to abut against or leave the positive electrode of the cylindrical battery cell.

[0046] In this embodiment, the guide post 32 is a columnar structure. By moving the guide post 32 relative to the limit end plate 2 closer to the accommodation space, the positive electrode abutting portion 31 located at the first section of the guide post 32 can abut against the positive electrode of the cylindrical battery cell. Conversely, when the guide post 32 moves away from the accommodation space relative to the limit end plate 2, the positive electrode abutting portion 31 located at the first section of the guide post 32 can leave the positive electrode of the cylindrical battery cell. In addition, the entire guide post 32 is made of a conductive material, and the positive electrode abutting portion 31 is at the first end of the guide post 32. At this time, only by connecting the guide post 32 to the power source, the positive electrode abutting portion 31 can be connected to the power source. Referring to Figure 3 , by providing the positive electrode connection portion 33 at the second end of the guide post 32, the positive electrode abutting portion 31 at the first end of the guide post 32 can be avoided, making the wiring more convenient.

[0047] Exemplarily, in some embodiments of the present application, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4, the positive electrode contact assembly 3 further includes a guide sleeve 34, an elastic member 35, and a clamping gasket 36. The guide sleeve 34 is fixed on the limit end plate 2. The guide post 32 is slidably disposed within the guide sleeve 34. The guide post 32 is provided with a flange 321 on the side where the positive electrode abutting portion 31 is provided. The second end of the guide post 32 is provided with an annular groove 322. The elastic member 35 is sleeved on the guide post 32. The second end of the guide post 32 passes through the guide sleeve 34. The clamping gasket 36 is fitted and clamped within the annular groove 322 and abuts against the side of the guide sleeve 34 away from the flange 321. Along the extending direction of the guide post 32, one end of the elastic member 35 abuts against the side of the guide sleeve 34 facing the flange 321, and the other end abuts against the flange 321, being limited between the guide sleeve 34 and the flange 321. When the positive electrode abutting portion 31 abuts against the positive electrode of the cylindrical battery cell, the elastic member 35 is in an elastically compressed state to provide a holding force towards the positive electrode of the cylindrical battery cell to the guide post 32.

[0048] In this embodiment, the guide sleeve 34 is a sleeve with a central hole structure. By fixing the guide sleeve 34 on the limit end plate 2, the guide post 32 can be adaptably disposed within the guide sleeve 34, facilitating the movement of the guide post 32 along the axial direction of the cylindrical battery cell. The elastic member 35 has a certain elastic deformation ability and outputs an elastic restoring force tending towards the initial form when elastically deformed. The elastic member 35 can be a spring sleeved on the guide post 32.

[0049] By slidably disposing the guide post 32 within the guide sleeve 34, the movement process of the guide post 32 can be guided and limited, facilitating the positioning and docking of the positive electrode abutting portion 31 at the first end of the guide post 32 with the positive electrode of the cylindrical battery cell. Additionally, the setting of the elastic member 35, on the one hand, gives a certain holding force to the abutment of the positive electrode abutting portion 31 with the positive electrode of the cylindrical battery cell, ensuring the reliability of the electrical connection. On the other hand, it can achieve flexible contact when the positive electrode abutting portion 31 abuts against the positive electrode of the cylindrical battery cell, preventing some damages to the cylindrical battery cell caused by hard contact.

[0050] In this embodiment, the clamping gasket 36 is a component that can be clamped at the position near the second end of the guide post 32. The annular groove 322 is a groove provided on the circumferential outer contour of the guide post 32, which is adapted to the clamping gasket 36. The flange 321 is a protrusion extending in a circle radially from the cylindrical end face of the guide post 32.

[0051] When the guide post 32 is arranged inside the guide sleeve 34, the first end of the guide post 32 is located on the side of the guide sleeve 34 facing the accommodation space for abutting against the positive electrode of the cylindrical battery cell, and the second end of the guide post 32 is located on the side of the guide sleeve 34 away from the accommodation space, isolated from the first end of the guide post 32. At the second end of the guide post 32, through the snap connection between the snap gasket 36 and the annular groove 322, the snap gasket 36 is fitted and snapped into the annular groove 322 and abuts against the side of the guide sleeve 34 away from the flange 321. The snap gasket 36 and the flange 321 limit the guide sleeve 34 on the guide post 32 to prevent disengagement. At the same time, in order to facilitate the arrangement of the spring, the spring is sleeved on the guide post 32. In this way, along the extending direction of the guide post 32, one end of the elastic member 35 abuts against the side of the guide sleeve 34 facing the flange 321, and the other end abuts against the flange 321, and is limited between the guide sleeve 34 and the flange 321. Further, when the positive electrode abutting portion 31 abuts against the positive electrode of the cylindrical battery cell, the elastic member 35 will be in an elastically compressed state, and thus can provide a holding force towards the positive electrode of the cylindrical battery cell to the guide post 32.

[0052] To facilitate the connection between the guide sleeve 34 and the limiting end plate 2, for example, in some embodiments of the present application, referring to Figure 2 、 Figure 3 and Figure 4 , the limiting end plate 2 is provided with a mounting hole 211 and a positioning hole 212. The mounting hole 211 penetrates the limiting end plate 2 along the sliding direction of the guide post 32. The positioning hole 212 is perpendicular to the extending direction of the mounting hole 211. One end of the positioning hole 212 communicates with the mounting hole 211, and the other end extends outside the limiting end plate 2. The guide sleeve 34 is fitted in the mounting hole 211. The positioning hole 212 is used for installing a positioning nail to position the guide sleeve 34 located in the mounting hole 211.

[0053] In this embodiment, both the mounting hole 211 and the positioning hole 212 are hole-shaped structures provided on the limiting end plate 2. The difference is that the shape and size of the mounting hole 211 are adapted to the guide sleeve 34, and the guide sleeve 34 is arranged in the mounting hole 211. The positioning hole 212 is adapted to positioning fasteners, such as fastening bolts, positioning pins, etc. One end of the positioning hole 212 communicates with the mounting hole 211, and the other end extends outside the limiting end plate 2. In this way, after the guide sleeve 34 is installed in the mounting hole 211 and the relative position is adjusted, by cooperating and connecting a fastener with the positioning hole 212, the end of the fastener can be pressed against the outer wall of the guide sleeve 34, thereby realizing the connection between the guide sleeve 34 and the limiting end plate 2 and facilitating positioning and fixing.

[0054] As long as the positive electrode connection portion 33 satisfies sufficient safety and the power supply wire can be electrically connected to the guide post 32. For example, in some embodiments of the present application, referring to Figure 3, the positive electrode connection part 33 is a positive electrode connection hole provided on the end face of the second end of the guide post 32, and the positive electrode connection hole is used to connect the power supply.

[0055] In this embodiment, the positive electrode connection hole is a hole-shaped structure, and the hole-shaped structure can be adapted to some fasteners, such as fastening bolts, etc. Through the cooperation of bolts and gaskets, etc., the function of a wiring terminal is realized, which is convenient for wiring and realizes electrical connection.

[0056] The positive electrode contact assembly 3 of the above embodiment can cooperate well with the convex structure of the pole column of the cylindrical battery cell, which is convenient for abutting electrical connection. Next, taking the scheme that the negative electrode contact assembly 4 can cooperate well with the flat type polarity output of the cylindrical battery cell as an example, an embodiment will be introduced.

[0057] Exemplarily, in some embodiments of the present application, refer to Figure 2 and Figure 5 , the negative electrode contact assembly 4 includes a positioning groove 42 and a contact block 43. The positioning groove 42 is provided on the side of the limiting end plate 2 facing the cylindrical battery cell. The contact block 43 is made of a conductive material and includes a negative electrode abutting portion 41 embedded in the positioning groove 42 and a negative electrode connection portion 44 extending outside the limiting end plate 2. When the cylindrical battery cell is located in the accommodating space, the negative electrode abutting portion 41 is in abutting electrical connection with the negative electrode of the cylindrical battery cell, and the negative electrode connection portion 44 is used to connect to the power supply.

[0058] In this embodiment, the positioning groove 42 can be a groove structure provided on the limiting end plate 2, and its shape and structure can be realized in various ways, such as strip-shaped, ring-shaped, circular, polygonal, etc. The contact block 43 is made of a conductive material and includes a negative electrode abutting portion 41 and a negative electrode connection portion 44 that match the positioning groove 42. The negative electrode abutting portion 41 is used to contact the negative electrode of the cylindrical battery cell, and its shape matches the positioning groove 42. In this way, the negative electrode abutting portion 41 can be easily snapped and embedded into the positioning groove 42. The negative electrode connection portion 44 extends outside the limiting end plate 2, which is convenient for wiring and connecting to the power supply. When the negative electrode of the cylindrical battery cell abuts against the limiting end plate 2, the negative electrode abutting portion 41 can abut against the negative electrode of the cylindrical battery cell to realize electrical connection with the cylindrical battery cell and charge the cylindrical battery cell.

[0059] Exemplarily, in some embodiments of the present application, refer to Figure 5 , both the positioning groove 42 and the contact block 43 are annular structures, and the outer contour of the contact block 43 is smaller than the outer contour of the cylindrical battery cell in the radial direction. When the cylindrical battery cell is located in the accommodating space, the negative electrode abutting portion 41 is in abutting electrical connection with one end face of the cylindrical battery cell.

[0060] In this embodiment, the annular positioning groove 42 can be well adapted to the cylindrical battery cell, ensuring a certain overcurrent area and creepage distance.

[0061] Exemplarily, in some embodiments of the present application, with reference to Figure 5 , a negative electrode connection portion 44 is provided with a negative electrode connection hole for connecting a power source.

[0062] In this embodiment, the negative electrode connection hole is a hole-shaped structure, which can be adapted to some fasteners, such as fastening bolts, etc. Through the cooperation of bolts and gaskets, etc., the function of a wiring terminal is realized, facilitating wiring and achieving electrical connection.

[0063] As mentioned above, in the cylindrical battery cell charging tooling of the embodiments of the present application, a plurality of end plate structures such as a third end plate and a fourth end plate can also be provided on the base 1, which will not be elaborated here. Below, exemplarily, taking the solution where the base 1 is provided with a first end plate 21 and a second end plate 22 as an example, some embodiments of the present application will be introduced.

[0064] Exemplarily, in some embodiments of the present application, with reference to Figure 2 and Figure 6 , the base 1 is provided with a plurality of fixing holes 11 corresponding to the first end plate 21 and the second end plate 22, and the first end plate 21 and the second end plate 22 are detachably connected to the base 1 through the fixing holes 11.

[0065] In this embodiment, in order to facilitate the design, manufacture and installation of the first end plate 21 and the second end plate 22, the connection between the base 1 and the first end plate 21 and the second end plate 22 is set as a detachable connection. One of the embodiments is realized by the fixing holes 11, and the fixing holes 11 can be connected to corresponding fasteners, thereby realizing the detachable connection of the first end plate 21, the second end plate 22 and the base 1. The fasteners can be fastening bolts, pins, rivets, etc.

[0066] It should be noted that only the fixing holes 11 are provided on the base 1 this time, considering that in some special fastening structures, only the fixing holes 11 can be provided on the base 1, and when connecting with the fixing holes 11 through fasteners, a structure such as a gasket or a pressing plate is crimped, and the first end plate 21 and the second end plate 22 can also be fixed on the base 1. That is, the first end plate 21 and the second end plate 22 may not be provided with hole structures corresponding to the fixing holes 11. Of course, in conventional structures such as bolts, pins, and rivets, the first end plate 21 and the second end plate 22 may also be provided with hole structures corresponding to the fixing holes 11, and the specific structure is not limited here.

[0067] When the cylindrical battery cell is limited in the accommodation space between the first end plate 21 and the second end plate 22, the length of the cylindrical battery cell should be adapted to this accommodation space. That is, for cylindrical battery cells with different length dimensions, the corresponding distance between the first end plate 21 and the second end plate 22 required is different. Taking a cylindrical battery cell with a diameter of 46 mm as an example, its height (the length between the first end plate 21 and the second end plate 22) can have different specifications such as 80, 95, 120 mm, etc. To address this issue, in some embodiments, various specifications of charging tooling for cylindrical battery cells with accommodation spaces of different lengths adapted to them can be manufactured to apply to the charging tests of cylindrical battery cells of different specifications. Of course, the length between the first end plate 21 and the second end plate 22 can also be set to be adjustable, and the adjustment range can cover the required length range, such as 80 - 120 mm. In this way, a charging tooling for one specification of cylindrical battery cells can meet the charging requirements of various specifications of cylindrical battery cells, improving the applicable range of this tooling. At the same time, when the cylindrical battery cell is installed between the first end plate 21 and the second end plate 22, by adjusting the distance between the first end plate 21 and the second end plate 22, it is convenient to install the cylindrical battery cell and prevent the cylindrical battery cell from getting stuck and being damaged.

[0068] Exemplarily, in some embodiments of the present application, referring to Figure 2 and Figure 6 , the fixing holes 11 on the base 1 corresponding to at least one of the first end plate 21 and the second end plate 22 are long holes, and the long holes are arranged along the extending direction of the cylindrical battery cell.

[0069] In this embodiment, the fixing holes 11 can be set as long holes arranged along the extending direction of the cylindrical battery cell. In this way, the limiting end plate 2 fixed corresponding to this long hole can slide within the extending range of the long hole until it slides to the required position and then is locked. Thus, the function of adjustment is achieved. Among them, the fixing holes 11 on the base 1 corresponding to at least one of the first end plate 21 and the second end plate 22 can refer to only the fixing holes 11 on the base 1 corresponding to fixing the first end plate 21, or only the fixing holes 11 on the base 1 corresponding to fixing the second end plate 22, or can include all the fixing holes 11 on the base 1 corresponding to fixing the first end plate 21 and the second end plate 22. That is, the first end plate 21 can be fixed to the base 1 through the long hole to realize the adjustability between the first end plate 21 and the base 1; the second end plate 22 can also be fixed to the base 1 through the long hole to realize the adjustability between the second end plate 22 and the base 1. Referring to Figure 2 and Figure 6 , the shown embodiment is where only the second end plate 22 is fixed to the base 1 through the long hole.

[0070] In addition, in order to facilitate the adjustment of the distance between the first end plate 21 and the second end plate 22, marks or scales can be made corresponding to the long slots. During the adjustment process, the marks or scales can be directly referred to for adjustment to the required position, without the need to measure the dimensions during adjustment, making the adjustment more convenient and rapid.

[0071] In the cylindrical battery single-cell charging tooling of the present application, the current during charging is relatively large, and relatively high requirements are imposed on the relative positional relationship of the positive and negative contact points of the cylindrical battery single-cell. For greater safety, a more stringent design is made for the positioning of the relative position of the cylindrical battery single-cell between the first end plate 21 and the second end plate 22, and multi-directional and multi-position positioning and limiting are carried out. Taking the cylindrical battery single-cell as an example, some embodiments of the multi-position limiting and positioning of the cylindrical battery single-cell in the present application are introduced below.

[0072] In some embodiments of the present application, with reference to Figure 1 and Figure 2 , the bearing assembly 5 includes a carrier 51. The carrier 51 is detachably connected to the base 1. The upper surface of the carrier 51 has a bearing arc surface 511. The radian of the bearing arc surface 511 is not less than the outer contour arc surface of the cylindrical battery single-cell, and the height of the bearing arc surface 511 does not exceed the center of the cylindrical battery single-cell.

[0073] In this embodiment, the part for bearing can be referred to as the carrier 51. The carrier 51 can be fixed on the base 1, and its fixing method can refer to the fixing method of the first end plate 21 or the second end plate 22 to the base 1, that is, it can be non-removably fixed or removably fixed. Among them, the removable fixing can be achieved by setting holes at corresponding positions on the base 1 for the fasteners to fix the two. In this embodiment, a cylindrical battery cell is taken as an example. To adapt to the outer contour of the cylindrical battery cell, a bearing arc surface 511 is provided on the carrier 51. The bearing arc surface 511 can be well adapted to the cylindrical battery cell, and can not only bear the cylindrical battery cell, but also play a certain limiting role. The radian of the bearing arc surface 511 is not less than the outer contour arc surface of the cylindrical battery cell, which means that the outer contour arc surface of the cylindrical battery cell will be the same as or smaller than the bearing arc surface 511. In this way, it is ensured that the cylindrical battery cell can be placed into the bearing arc surface 511, avoiding the situation where the cylindrical battery cell is larger than the bearing arc surface 511 and is propped on the bearing arc surface 511. The height of the bearing arc surface 511 does not exceed the center of the cylindrical battery cell, which means that for the corresponding cylindrical battery cell, when the height of the bearing arc surface 511 is equal to or exceeds the center of the cylindrical battery cell, the cylindrical outer contour of the cylindrical battery cell will show a gradually shrinking situation on both sides. At this time, if the bearing arc surface 511 wants to adapt to the cylindrical battery cell, it needs to gradually shrink on both sides, which will make the opening of the bearing arc surface 511 smaller and is not conducive to the cylindrical battery cell being properly placed in the bearing arc surface 511; or, if the bearing arc surface 511 exceeds the center of the cylindrical battery cell and does not shrink on both sides, it will not contact the outside of the cylindrical battery cell either and will not play a bearing and limiting role. Therefore, in some embodiments, the radian of the bearing arc surface 511 is not less than the outer contour arc surface of the cylindrical battery cell, and the height of the bearing arc surface 511 does not exceed the center of the cylindrical battery cell.

[0074] The carrier 51 limits the lower half of the cylindrical battery cell. Next, in order to limit the upper half of the cylindrical battery cell, for example, in some embodiments of the present application, referring to Figure 1 and Figure 2 , the bearing assembly 5 further includes a limiting body 52. A limiting arc surface 521 is provided on the lower surface of the limiting body 52. The radian of the limiting arc surface 521 is not less than the outer contour arc surface of the cylindrical battery cell, and the height of the limiting arc surface 521 does not exceed the center of the cylindrical battery cell. The limiting body 52 is detachably connected above the carrier 51, and the cylindrical battery cell is limited in the space enclosed by the bearing arc surface 511 and the limiting arc surface 521.

[0075] In this embodiment, when the limiting body 52 is connected to the carrier body 51, the space formed inside can limit the circumference of the cylindrical battery cell. For the convenience of installing the cylindrical battery cell, the limiting body 52 and the carrier body 51 are connected in a detachable manner. The shape and structure of the limiting arc surface 521 provided on the lower surface of the limiting body 52 can refer to the setting of the bearing arc surface 511. In order to circumferentially and comprehensively limit the cylindrical battery cell after cooperating with the bearing arc surface 511, the radian of the limiting arc surface 521 is not less than the outer contour arc surface of the cylindrical battery cell, and the height of the limiting arc surface 521 does not exceed the center of the cylindrical battery cell.

[0076] For example, in some embodiments of the present application, with reference to Figure 1 and Figure 2 , the cylindrical space enclosed by the bearing arc surface 511 and the limiting arc surface 521 is consistent with the outer contour of the cylindrical battery cell.

[0077] In this embodiment, the cylindrical space enclosed by the bearing arc surface 511 and the limiting arc surface 521 can be completely consistent with the cylindrical battery cell, and thus the cylindrical battery cell will be completely fixed and limited within this space.

[0078] For example, in some embodiments of the present application, the bearing assembly 5 further includes a flexible coating, and the flexible coating is provided on the bearing arc surface 511 and the limiting arc surface 521.

[0079] In this embodiment, the flexible coating refers to a structure with flexible deformation ability provided on the bearing arc surface 511 and the limiting arc surface 521, and it can be made of deformable flexible materials such as rubber. The forming of the flexible coating is not limited herein. It can be directly coated and formed on the bearing arc surface 511 and the limiting arc surface 521, or it can be a separately manufactured component and fixed on the bearing arc surface 511 and the limiting arc surface 521 during assembly.

[0080] In this way, when the cylindrical battery cell is limited within the cylindrical space enclosed by the bearing arc surface 511 and the limiting arc surface 521, what contacts the cylindrical battery cell is the flexible coating with flexible deformation characteristics. On the one hand, it can be in flexible contact with the cylindrical battery cell to prevent damage to the outer shell of the cylindrical battery cell. On the other hand, it can increase the friction between the bearing arc surface 511 and the limiting arc surface 521 and the cylindrical battery cell, further improving the reliability of the limitation.

[0081] In some embodiments, the proportion of the use of flexible materials can be increased. For example, at least half of the carrier body 51 and the limiting body 52 are made of flexible materials, and there is a flexible deformation layer with sufficient thickness on the side facing the cylindrical battery cell. In this way, on the basis of preventing damage to the outer shell of the cylindrical battery cell and further improving the reliability of the limitation, through a larger range of deformation ability, the adaptability to cylindrical battery cells of different sizes can also be improved.

[0082] In addition, for different ways of protruding pole posts in different forms of cylindrical battery cells, different numbers and structures of limiting end plates 2, positive contact components 3 and negative contact components 4 at different positions can be selected. For example, in an embodiment having a first end plate 21 and a second end plate 22, for the case of protruding pole posts on the same side, the positive contact component 3 and the negative contact component 4 can be correspondingly arranged on one of the first end plate 21 and the second end plate 22 to correspond to the case of protruding pole posts on the same side; for the case of protruding pole posts on both sides, the positive contact component 3 and the negative contact component 4 can be respectively arranged on the first end plate 21 and the second end plate 22; for the case of protruding a positive pole post on one side and a negative pole from the rest of the housing, it can be that the positive contact component 3 and the negative contact component 4 are respectively arranged on the first end plate 21 and the second end plate 22, or the positive contact component 3 is arranged on the first end plate 21 and the negative contact component 4 is arranged at any position close to the housing of the cylindrical battery cell. Therefore, the specific morphological structure of the charging tooling for the cylindrical battery cell in the embodiments of the present application can be combined and matched as needed.

[0083] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.

Claims

1. A charging tool for a cylindrical battery cell, characterized in that Comprising: Base; Limit end plates, including a first end plate and a second end plate spaced apart on the base, a receiving space is formed between the first end plate and the second end plate, and the receiving space is used to receive cylindrical battery cells; Positive contact assembly, including a positive contact portion; Negative contact assembly, including a negative contact portion, the positive contact portion and the negative contact portion are connected to a power source; Carrying assembly, the carrying assembly is fixed on the base and is located between the first end plate and the second end plate; The positive contact assembly and the negative contact assembly are arranged on the limit end plates. When the cylindrical battery cell is located in the receiving space, at least part of the carrying assembly is located below the cylindrical battery cell to carry the cylindrical battery cell. The first end plate and the second end plate are respectively located at both ends of the cylindrical battery cell. The positive contact portion and the negative contact portion are respectively in contact with the positive electrode and the negative electrode of the cylindrical battery cell to achieve electrical connection; The positive contact assembly includes a guide post, a guide sleeve, an elastic member and a clamping gasket made of a conductive material. The guide sleeve is fixed on the limit end plate. The guide post is slidably arranged in the guide sleeve. A flange is provided at the first end of the guide post. An annular groove is provided at the second end of the guide post. The elastic member is sleeved on the guide post. The second end of the guide post passes through the guide sleeve. The clamping gasket is fitted and clamped in the annular groove and abuts against the side of the guide sleeve away from the flange. Along the extending direction of the guide post, one end of the elastic member abuts against the side of the guide sleeve facing the flange, and the other end abuts against the flange, and is limited between the guide sleeve and the flange. When the positive contact portion abuts against the positive electrode of the cylindrical battery cell, the elastic member is in an elastically compressed state to provide a holding force towards the positive electrode of the cylindrical battery cell to the guide post; The carrying assembly includes a carrier and a limiting body. The carrier is detachably connected to the base. The limiting body is detachably connected above the carrier. When the limiting body and the carrier are connected, the space formed inside is used to limit the circumference of the cylindrical battery cell.

2. The charging tooling for cylindrical battery cells according to claim 1, characterized in that, The limit end plate is provided with a mounting hole and a positioning hole. The mounting hole penetrates the limit end plate along the sliding direction of the guide post. The positioning hole is perpendicular to the extending direction of the mounting hole. One end of the positioning hole communicates with the mounting hole, and the other end extends outside the limit end plate. The guide sleeve is fitted and arranged in the mounting hole. The positioning hole is used to install a positioning pin to position the guide sleeve located in the mounting hole.

3. The charging tooling for cylindrical battery cells according to claim 1, wherein, A positive electrode wiring hole is provided on the end face of the second end of the guide post, and the positive electrode wiring hole is used to connect to a power source.

4. The cylindrical battery cell charging tooling according to claim 1, characterized in that, The negative electrode contact assembly includes a positioning groove and a contact block. The positioning groove is provided on the side of the limiting end plate facing the cylindrical battery cell. The contact block is made of a conductive material and includes a negative electrode abutting portion embedded in the positioning groove and a negative electrode wiring portion extending outside the limiting end plate. When the cylindrical battery cell is located in the accommodating space, the negative electrode abutting portion abuts and is electrically connected to the negative electrode of the cylindrical battery cell, and the negative electrode wiring portion is used to connect to a power source.

5. The cylindrical battery cell charging tooling according to claim 4, wherein Both the positioning groove and the contact block are annular structures. The outer contour of the contact block is smaller than the outer radial contour of the cylindrical battery cell. When the cylindrical battery cell is located in the accommodating space, the negative electrode abutting portion abuts and is electrically connected to one end face of the cylindrical battery cell.

6. The charging tooling for the cylindrical battery cell according to claim 4, wherein, The negative electrode wiring portion is provided with a negative electrode wiring hole for connecting to a power source.

7. The charging tooling for cylindrical battery cells according to any one of claims 1 to 6, characterized in that A plurality of fixing holes are provided on the base corresponding to the first end plate and the second end plate. The first end plate and the second end plate are detachably connected to the base through the fixing holes.

8. The charging tooling for cylindrical battery cells according to claim 7, wherein, The fixing holes corresponding to at least one of the first end plate and the second end plate on the base are elongated holes, and the elongated holes are arranged along the extending direction of the cylindrical battery cell.

9. The charging tooling for cylindrical battery cells according to claim 1, wherein, The upper surface of the carrier has a bearing arc surface. The radian of the bearing arc surface is not less than the outer contour arc surface of the cylindrical battery cell, and the height of the bearing arc surface does not exceed the center of the cylindrical battery cell.

10. The cylindrical battery cell charging tooling according to claim 9, wherein, The lower surface of the limiting body is provided with a limiting arc surface. The radian of the limiting arc surface is not less than the outer contour arc surface of the cylindrical battery cell, and the height of the limiting arc surface does not exceed the center of the cylindrical battery cell. The limiting body is detachably connected above the carrier, and the cylindrical battery cell is limited in the space surrounded by the bearing arc surface and the limiting arc surface.

11. The charging tooling for cylindrical battery cells according to claim 10, characterized in that, The space surrounded by the bearing arc surface and the limiting arc surface is cylindrical and is consistent with the outer contour of the cylindrical battery cell.

12. The charging tooling for cylindrical battery cells according to claim 10, wherein The carrier assembly further includes a flexible coating layer provided on the bearing arc surface and the limiting arc surface.

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