Battery cell injection equipment and battery cell production line

Abstract

The present application discloses a battery cell injection device and a battery cell production line, wherein the battery cell injection tooling comprises a carrying tray, a base, a bracket and an injection assembly, wherein the carrying tray is used to support the battery cell to be injected, the carrying tray is placed on the base, the bracket is connected to the base, the bracket comprises a substrate that moves in a vertical direction, the injection assembly is arranged on the base, the injection assembly comprises an injection needle, the substrate drives the injection needle to move in a direction close to the injection hole of the battery cell to be injected, a first limit assembly is arranged on the carrying tray, a second limit assembly is arranged on the injection mechanism, and a third limit assembly is arranged between the carrying tray and the base, the first limit assembly, the second limit assembly and the third limit assembly are used to limit the position of the injection hole of the battery cell to be injected relative to the injection needle, and the technical solution provided in the present application can reduce the risk of the injection needle piercing the non-injection hole on the battery cell to be injected.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell injection device and a battery cell production line. Background Art

[0002] Battery cell injection is an important process in the production of battery cells. In the related art, on the battery cell injection equipment used to inject liquid into the battery cells to be injected, due to the insufficient design of the limiting function of the injection hole of the battery cell to be injected, the position of the injection hole of the battery cell to be injected relative to the injection needle is easy to change during the injection process, and the injection hole of the battery cell to be injected is offset relative to the injection needle, so that the injection needle pierces the non-injection hole of the battery cell to be injected. Summary of the invention

[0003] The battery cell injection equipment and battery cell production line provided in the present application can reduce the possibility that the position of the injection hole of the battery cell to be injected relative to the injection needle changes, resulting in the injection hole of the battery cell to be injected being offset relative to the injection needle, thereby reducing the risk of the injection needle piercing the non-injection hole of the battery cell to be injected.

[0004] In a first aspect, the present application provides a battery cell injection device, which includes a carrying tray, a base and an injection assembly, wherein the carrying tray is used to support the battery cell to be injected, the carrying tray is placed on the base, and the bracket is connected to the base, the bracket includes a substrate that moves in a vertical direction, the injection assembly is arranged on the substrate, the injection assembly includes an injection needle, the substrate drives the injection needle to move along a position close to an injection hole of the battery cell to be injected, and is used to inject liquid into the battery cell to be injected, a first limit assembly is arranged on the carrying tray, a second limit assembly is arranged on the injection assembly, and a third limit assembly is arranged between the carrying tray and the base, the first limit assembly, the second limit assembly and the third limit assembly are used to limit the position of the injection hole of the battery cell to be injected relative to the injection needle.

[0005] The battery cell injection equipment provided by the present application, firstly, since the carrying tray is used to support the battery cells to be injected, by arranging a first limiting component on the carrying tray, the position of the battery cells to be injected on the carrying tray can be limited, thereby realizing the first level of limiting the injection hole of the battery cells to be injected; then, since the injection component is used to inject liquid into the battery cells to be injected, by arranging a second limiting component on the injection component, the position of the injection component and the injection hole of the battery cells to be injected can be limited, thereby realizing the second level of limiting the injection hole of the battery cells to be injected; furthermore, since the carrying tray is placed on the base, by arranging a third limiting component between the carrying tray and the base, the position between the carrying tray and the base can be limited, thereby realizing the third level of limiting the injection hole of the battery cells to be injected, and the position of the injection hole of the battery cells to be injected relative to the injection needle is limited by the triple limiting. Compared with the technical problem in the related art that the injection hole of the battery cell to be injected is easily offset relative to the injection needle during the injection process, and the injection needle is easily pierced through the non-injection hole of the battery cell to be injected, the present application limits the position of the injection hole of the battery cell to be injected relative to the injection needle through triple limiting, thereby improving the position accuracy of the injection hole of the battery cell to be injected relative to the injection needle. In other words, it reduces the possibility of the position of the injection hole of the battery cell to be injected relative to the injection needle changing, resulting in the displacement of the injection hole of the battery cell to be injected relative to the injection needle, thereby reducing the risk of the injection needle piercing the non-injection hole of the battery cell to be injected.

[0006] In an implementation provided in the present application, the carrying tray includes a carrying cavity, the carrying cavity is used to carry and drag the battery cell to be filled with liquid, and the first limiting component is arranged in the carrying cavity to limit the position of the injection hole of the battery cell to be filled with liquid relative to the carrying cavity.

[0007] The battery cell liquid filling device provided in the present application prevents the first limiting component from being exposed by arranging the first limiting component in the bearing cavity, thereby improving the aesthetics of the battery cell liquid filling device.

[0008] In an implementable method provided in the present application, the first limiting component includes an in-cavity limiting member, which is fixed to the carrying cavity. When the battery cell to be filled with liquid is located in the carrying cavity, the in-cavity limiting member is used to abut against the surface of the battery cell to be filled with liquid along the horizontal direction.

[0009] The battery cell injection equipment provided in the present application fixes the intra-cavity limiter to the carrying cavity to reduce the possibility of the intra-cavity limiter moving in the carrying cavity. When the battery cell to be injected is located in the carrying cavity, the intra-cavity limiter is used to abut against the surface of the battery cell to be injected along the horizontal direction, thereby limiting the position of the injection hole of the battery cell to be injected in the carrying cavity relative to the injection needle along the horizontal direction, thereby reducing the possibility of the injection hole of the battery cell to be injected being offset relative to the injection needle.

[0010] In an implementable method provided in the present application, there are multiple in-cavity limiting members, and the multiple in-cavity limiting members are distributed in the horizontal direction. A first limiting gap is enclosed between the multiple in-cavity limiting members. When the battery cell to be filled with liquid is located in the first limiting gap, the multiple in-cavity limiting members are all used to abut against the surface of the battery cell to be filled with liquid along the horizontal direction.

[0011] The battery cell injection equipment provided in the present application is equipped with multiple in-cavity limiters, and when the battery cell to be injected is located in the first limit gap, the multiple in-cavity limiters are used to abut against the horizontal surface of the battery cell to be injected, so as to further limit the position of the injection hole of the battery cell to be injected in the supporting cavity relative to the injection needle along the horizontal direction, thereby further reducing the possibility of the injection hole of the battery cell to be injected being offset relative to the injection needle.

[0012] In an implementable method provided in the present application, there are two intra-cavity limit members. Along the horizontal direction, the angle between the abutment position of one intra-cavity limit member used to abut against the surface of the battery cell to be injected with liquid along the horizontal direction and the abutment position of the other intra-cavity limit member used to abut against the surface of the battery cell to be injected with liquid along the horizontal direction is less than 180 degrees. The first limit assembly also includes a connecting member, which is arranged on the side close to each other between the two intra-cavity limit members.

[0013] The battery cell injection device provided by the present application only sets two intra-cavity limiters, and the angle between the position where one intra-cavity limiter is used to abut against the surface of the battery cell to be injected along the horizontal direction and the position where the other intra-cavity limiter is used to abut against the surface of the battery cell to be injected along the horizontal direction is less than 180 degrees. At the same time, a connecting piece is set on the side close to each other between the two intra-cavity limiters, similar to a V-shaped clamp, to clamp the surface of the battery cell to be injected along the horizontal direction. The horizontal limitation of the battery cell to be injected relative to the injection needle in the supporting cavity can be achieved only by the V-shaped structure, and the technical effect is simple in structure and easy to achieve.

[0014] In one possible implementation provided in the present application, the battery cell to be filled with liquid is a cylindrical battery cell, and the surface of the in-cavity limiting member used to abut against the cylindrical battery cell in the horizontal direction is a curved surface, and the curved surface is used to adapt to the curved surface of the cylindrical battery cell in the horizontal direction.

[0015] The battery cell injection equipment provided by the present application sets the surface of the intra-cavity limiter that abuts against the battery cell to be injected in the horizontal direction as a curved surface, so that the curved surface is used to fit with the curved surface of the cylindrical battery cell in the horizontal direction, so that the intra-cavity limiter is in surface contact with the surface of the cylindrical battery cell in the horizontal direction, thereby improving the reliability of the intra-cavity limiter abutting against the surface of the cylindrical battery cell in the horizontal direction.

[0016] In an implementable method provided in the present application, the second limiting component includes a connecting plate and a horizontal side limiting member. The connecting plate is connected to the injection component. A first through hole is opened on the connecting plate. The first through hole is used for the injection needle to pass through. The horizontal side limiting member is arranged on the side of the connecting plate facing the supporting tray. When the substrate drives the injection needle to approach the battery cell to be injected, the horizontal side limiting member is used to abut against the surface of the battery cell to be injected along the horizontal direction.

[0017] The battery cell injection equipment provided by the present application connects a connecting plate with an injection assembly, wherein a first through hole is provided on the connecting plate, and the first through hole is used for allowing an injection needle to pass through, thereby establishing a connection between the positions of the connecting plate and the injection needle. On this basis, a horizontal side limiter is provided on the side of the connecting plate facing the supporting tray, so that a positional relationship is established between the injection needle and the horizontal side limiter, and when the substrate drives the injection needle to move in a direction close to the injection hole of the battery cell to be injected, the horizontal side limiter is used to abut against the surface of the battery cell to be injected along the horizontal direction, thereby limiting the position of the injection hole of the battery cell to be injected relative to the injection needle along the horizontal direction, thereby reducing the possibility of the injection hole of the battery cell to be injected being offset relative to the injection needle.

[0018] In an implementable method provided in the present application, there are multiple horizontal side limit members, and the multiple horizontal side limit members are distributed on the connecting plate along the horizontal direction. The multiple horizontal side limit members are arranged to form a second limiting gap. When the battery cell to be filled with liquid is located in the second limiting gap, the multiple horizontal side limit members are all used to abut against the surface of the battery cell to be filled with liquid along the horizontal direction.

[0019] The battery cell filling equipment provided in the present application is equipped with multiple horizontal side limiters, and when the battery cell to be filled is located in the second limit gap, the multiple horizontal side limiters are used to abut against the surface of the battery cell to be filled along the horizontal direction, so as to further limit the position of the injection hole of the battery cell to be filled relative to the injection needle along the horizontal direction, thereby further reducing the possibility of the injection hole of the battery cell to be filled being offset relative to the injection needle.

[0020] In an implementation provided in the present application, a guide slope is provided on a side of the horizontal side limiting member close to the carrying tray, and the guide slope is inclined toward the second limiting gap.

[0021] The battery cell filling device provided in the present application provides a guiding inclined surface inclined toward the second limiting gap on the side of the horizontal side limiting member close to the carrying tray, so as to facilitate the battery cells to be filled to smoothly enter the second limiting gap.

[0022] In an implementable method provided in the present application, the battery cell to be filled with liquid is a cylindrical battery cell, and the surface of the horizontal side limiter that abuts against the cylindrical battery cell in the horizontal direction is a curved surface, and the curved surface is used to adapt to the curved surface of the cylindrical battery cell in the horizontal direction.

[0023] The battery cell filling device provided in the present application sets the surface of the horizontal side limiter that abuts against the cylindrical battery cell in the horizontal direction as a curved surface, so that the curved surface is used to adapt to the curved surface of the cylindrical battery cell in the horizontal direction, so that the horizontal side limiter is in surface contact with the surface of the cylindrical battery cell in the horizontal direction, so as to improve the reliability of the horizontal side limiter abutting against the surface of the battery cell to be filled with liquid along the horizontal direction.

[0024] In an implementation provided in the present application, there are two horizontal side limit members, and the two horizontal side limit members are distributed on the connecting plate at an interval of 180 degrees in the horizontal direction.

[0025] The battery cell filling device provided in the present application only sets two horizontal side limiters, and the two horizontal side limiters are distributed on the connecting plate at an interval of 180 degrees in the horizontal direction. This can achieve the limitation of the filling hole of the battery cell to be filled with respect to the filling needle along the radial direction of the battery cell to be filled, and has technical effects such as simple structure and easy implementation.

[0026] In an implementable method provided in the present application, the second limiting assembly also includes a hole limiting member, which is arranged on the side of the connecting plate facing the supporting tray. When the substrate drives the injection needle to move along the injection hole close to the battery cell to be injected, the hole limiting member is used to abut against the surface of the battery cell to be injected along the vertical direction.

[0027] The battery cell injection equipment provided in the present application is configured by setting a hole position limiter on the side of the connecting plate facing the supporting tray, and when the base plate drives the injection needle to move in the direction of the injection hole close to the battery cell to be injected, the hole position limiter is used to abut against the surface of the battery cell to be injected along the vertical direction to limit the position of the injection hole of the battery cell to be injected relative to the injection needle along the vertical direction of the battery cell to be injected, thereby reducing the possibility of the injection hole of the battery cell to be injected being offset relative to the injection needle.

[0028] In an implementable method provided in the present application, a second through hole is opened on the hole position limiter, the axis of the second through hole is colinear with the axis of the first through hole, the second through hole is used for the injection needle to pass through, and the hole position limiter is used to abut against the glue nail of the battery cell to be injected in the vertical direction.

[0029] The battery cell injection equipment provided in the present application has a second through hole formed on the hole limiter, the second through hole is used for the injection needle to pass through, and the hole limiter is used to abut against the glue nails of the battery cell to be injected along the vertical direction, so that the injection needle can accurately pierce the glue nails of the battery cell to be injected, thereby completing the injection.

[0030] In an implementation method provided in the present application, the injection assembly also includes a mounting plate and a injection cup, the mounting plate is connected to the substrate, the injection cup is installed on the substrate, the injection cup is connected to the injection needle, and the mounting plate is elastically connected to the connecting plate.

[0031] The battery cell injection equipment provided in the present application elastically connects the mounting plate and the connecting plate. After the injection is completed, when the injection needle leaves the glue nail of the battery cell to be injected, the hole limiter can also press the glue nail to reduce the possibility of the glue nail falling off.

[0032] In an implementation method provided in the present application, the third limiting component includes a limiting groove set on the base and a limiting protrusion set on the carrying tray. When the carrying tray is placed on the base, the limiting protrusion is adapted to the limiting groove to limit the position of the carrying tray relative to the base.

[0033] The battery cell filling equipment provided in the present application sets a limiting groove on the base and sets the direction of the limiting protrusion on the carrying tray so that the limiting protrusion and the limiting groove are adapted to each other, thereby limiting the position of the carrying tray relative to the base, and has technical effects such as simple structure and easy implementation.

[0034] In an implementation provided in the present application, the third limiting assembly further includes an adhesive member, which is disposed on at least one of the limiting groove and the limiting protrusion, and the carrying tray is bonded to the base via the adhesive member.

[0035] The battery cell liquid injection equipment provided in the present application provides an adhesive on at least one of the limiting groove and the limiting protrusion, and the carrying tray and the base are bonded by the adhesive, thereby improving the reliability of the limiting between the carrying tray and the base.

[0036] In an implementable method provided in the present application, the liquid injection assembly also includes a vacuum pump, a liquid supply pipe, an on-off valve and a sealing member that moves along the substrate. The vacuum pump and the liquid supply pipe are respectively connected to the liquid injection cup. The on-off valve is arranged between the liquid injection cup and the liquid injection needle to control the on-off of the liquid injection cup and the liquid injection needle. The liquid injection cup is provided with a third through hole, and the sealing member is used to seal the third through hole.

[0037] The battery cell liquid injection equipment provided in the present application connects the vacuum pump and the liquid supply pipe to the liquid injection cup respectively, and the on-off valve is arranged between the liquid injection cup and the liquid injection needle to control the on-off of the liquid injection cup and the liquid injection needle. At the same time, there is a third through hole on the liquid injection cup, and the sealing member is used to seal the third through hole, so as to perform alternating positive and negative pressure cycles to complete the liquid injection and improve the liquid injection efficiency.

[0038] In an implementation provided in the present application, the liquid injection assembly further includes a blocking cylinder, which is disposed on the substrate and connected to the blocking member to drive the blocking member to move on the substrate.

[0039] The battery cell liquid injection equipment provided in the present application can drive the sealing member to move on the substrate only by using a sealing cylinder, and has a simple structure and easy-to-implement technical effect.

[0040] In a second aspect, the present application provides a battery cell production line, which includes a conveyor line, a handling mechanism and a battery cell filling device provided in any one of the first aspects, the conveyor line is used to convey the battery cells to be filled with liquid, and the handling mechanism is used to transport the battery cells to be filled with liquid on the conveyor line to the carrying tray of the battery cell filling device.

[0041] The battery cell production line provided in the present application, since it includes the battery cell injection equipment provided in any one of the first aspects, has the same technical effect, that is, it can reduce the possibility of the position of the injection hole of the battery cell to be injected relative to the injection needle changing, resulting in the injection hole of the battery cell to be injected being offset relative to the injection needle, thereby reducing the risk of the injection needle piercing the non-injection hole of the battery cell to be injected. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0043] Figure 1 A schematic diagram of the structure of a battery cell production line provided in an embodiment of the present application;

[0044] Figure 2 A left view of a first stereoscopic structure of a battery cell liquid injection device provided in an embodiment of the present application;

[0045] Figure 3 A second three-dimensional structure of the battery cell liquid injection device provided in an embodiment of the present application;

[0046] Figure 4 A front view of a second three-dimensional structure of the battery cell liquid injection device provided in an embodiment of the present application;

[0047] Figure 5 A top view of a second three-dimensional structure of a battery cell liquid injection device provided in an embodiment of the present application;

[0048] Figure 6 A left view of a second three-dimensional structure of a battery cell liquid injection device provided in an embodiment of the present application;

[0049] Figure 7 A schematic structural diagram of three cavity limiters in the battery cell liquid injection device provided in an embodiment of the present application, which are distributed in the bearing cavity and abut against the surface of the battery cell to be injected along the horizontal direction;

[0050] Figure 8 A schematic structural diagram of two cavity stoppers in the cell liquid injection device provided in an embodiment of the present application, which are distributed in the bearing cavity and are used to abut against the surface of the cell to be injected along the horizontal direction;

[0051] Fig. 9 This is a schematic structural diagram of a battery cell liquid injection device according to an embodiment of the present application, in which two cavity limiters are distributed in the bearing cavity, and a surface of one of the cavity limiters that abuts against a surface of a battery cell to be injected along a horizontal direction is a curved surface;

[0052] Fig.10 A schematic diagram of a three-dimensional structure of a battery cell injection device provided in an embodiment of the present application, in which two horizontal side limiters are distributed on a transition plate and are used to abut against the horizontal surface of the battery cell to be injected, and a hole limiter is connected to the transition plate and is used to abut against the vertical surface of the battery cell to be injected;

[0053] Fig.11 A schematic diagram of a three-dimensional structure in which two horizontal side limiters are distributed on a transition plate and a hole limiter is connected to the transition plate in a battery cell liquid injection device provided in an embodiment of the present application;

[0054] Fig.12 A bottom view of a cell liquid injection device provided in an embodiment of the present application, in which two horizontal side limiters are distributed on a transition plate and a hole limiter is connected to the transition plate;

[0055] Fig.13 A left view of a cell liquid injection device provided in an embodiment of the present application, in which two horizontal side limiters are distributed on a transition plate and a hole limiter is connected to the transition plate;

[0056] Fig.14 A bottom view showing that a ring-shaped horizontal side stopper is respectively on a transition plate and a hole stopper is connected to the transition plate in a liquid injection cell device provided in an embodiment of the present application;

[0057] Fig.15 A schematic diagram of the three-dimensional structure of a sealing member in a battery cell liquid injection device provided in an embodiment of the present application.

[0058] Description of reference numerals:

[0059] 1-carrying tray; 11-carrying cavity; 2-base; 3-liquid injection assembly; 31-liquid injection needle; 32-mounting plate; 33-liquid injection cup; 331-third through hole; 34-on-off valve; 35-sealing piece; 351-mounting part; 36-sealing cylinder; 4-first limit assembly; 41-intracavity limit piece; 5-second limit assembly; 51-connecting plate; 52-horizontal side limit piece; 521-guide ramp; 53-transition plate; 531-first threaded hole; 54-hole limit piece; 541-second through hole; 6-battery cell to be injected; 61-glue nail; 7-bracket; 71-substrate; 711-sliding block; 72-sliding guide rail; 8-conveyor line; 9-handling mechanism. DETAILED DESCRIPTION

[0060] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians 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" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0062] 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 number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0063] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0064] 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 three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0065] 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" and "outside" 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.

[0066] 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.

[0067] 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.

[0068] Below, this application is described in detail.

[0069] Batteries are used more and more widely in life and industry. They are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric transportation vehicles such as electric bicycles, electric motorcycles, electric cars, as well as in aerospace and other fields.

[0070] Reference Figure 1 In the embodiment of the present application, the unprocessed battery is called a battery cell. In the battery cell production line, the battery cell 6 to be filled with liquid is first produced by the battery cell production tooling. Here, it should be noted that the liquid to be filled in the battery cell 6 to be filled with liquid is an electrolyte, and then the conveyor line 8 is used to convey the battery cell 6 to be filled with liquid. When the battery cell filling equipment is used to fill the battery cell 6 to be filled with liquid, the conveying mechanism 9 is used to convey the battery cell 6 to be filled with liquid on the conveyor line 8 to the carrying tray 1 of the battery cell filling equipment, and the battery cell 6 to be filled with liquid is filled, and then the filled battery cell is left to rest by the static tooling, etc. The battery cell 6 to be filled with liquid generally needs to be filled with liquid twice. The first filling is to be filled to a nearly full state, and then the battery cell is replenished with liquid for the second time after the treatment and formation.

[0071] In the embodiment of the present application, the conveyor line 8 can be a belt conveyor, and the conveyor line 8 can also be a chain conveyor, which is not limited by the embodiment of the present application.

[0072] In the embodiment of the present application, the transport mechanism 9 is used to transport the battery cells 6 to be injected with liquid on the conveyor line 8 to the supporting tray 1 of the battery cell injection equipment. Here, the transport mechanism 9 can be a transport robot that clamps the battery cells 6 to be injected with liquid. The transport mechanism 9 can also be a transport robot that magnetically attracts the battery cells 6 to be injected with liquid. The transport mechanism can also be a transport robot that pushes and pulls the battery cells 6 to be injected with liquid on the conveyor line 8 to the supporting tray 1 of the battery cell injection mechanism. The embodiment of the present application is also not limited to this.

[0073] However, in the related art, on the battery cell filling equipment used for filling liquid into the battery cell to be filled, due to the insufficient design of the limiting function of the injection hole of the battery cell to be filled, the position of the injection hole of the battery cell to be filled relative to the injection needle is prone to change during the injection process, and the injection hole of the battery cell to be filled is offset relative to the injection needle, so that the injection needle pierces the non-injection hole of the battery cell to be filled, for example, the injection needle pierces the electrode of the battery cell to be filled, and the battery cell to be filled is short-circuited.

[0074] In view of the problems existing in the above-mentioned related technologies, and referring to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The embodiment of the present application provides a battery cell injection device, which includes a carrying tray 1, a base 2, a bracket 7 and an injection assembly 3, wherein the carrying tray 1 is used to support the battery cell 6 to be injected, the carrying tray 1 is placed on the base 2, the bracket 7 is connected to the base 2, and the bracket 7 includes a substrate 71 that moves in a vertical direction.

[0075] The injection component 3 is arranged on the substrate 71, and the injection component 3 includes an injection needle 31. The substrate 71 drives the injection needle 31 to move in the direction close to the injection hole of the battery cell 6 to be injected. A first limiting component 4 is arranged on the supporting tray 1, and a second limiting component 5 is arranged on the injection component 3. A third limiting component is arranged between the supporting tray 1 and the base 2. The first limiting component 4, the second limiting component 5 and the third limiting component are used to limit the position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31.

[0076] In the embodiment of the present application, the supporting tray 1 is used to support the battery cells 6 to be filled with liquid. Here, the side of the supporting tray 1 used to support the battery cells 6 to be filled with liquid can be a plane, and the plane is used to support the battery cells 6 to be filled with liquid. Of course, the side of the supporting tray 1 used to support the battery cells 6 to be filled with liquid can be concave to form a supporting cavity 11, and the supporting cavity 11 is used to support the battery cells 6 to be filled with liquid. In addition, the supporting tray 1 can be other structures, which are not limited to the embodiments of the present application.

[0077] In the embodiment of the present application, the bracket 7 is connected to the base 2. Here, the bracket 7 and the base 2 can be connected in a non-detachable manner, for example, the bracket 7 and the base 2 are welded; of course, the bracket 7 and the base 2 can also be connected in a detachable manner, for example, the bracket 7 and the base 2 are threaded, etc., and this is not limited in the embodiment of the present application. In an implementable manner provided in the embodiment of the present application, the bracket 7 is welded to the base 2, so that the later installation cost can be saved.

[0078] In an embodiment of the present application, the bracket 7 includes a substrate 71 that moves in a vertical direction. Here, the bracket 7 may include a substrate 71 that slides in the vertical direction; of course, the bracket 7 may include a substrate 71 that rolls in the vertical direction; in addition, the bracket 7 may also include a substrate 71 that moves in other ways in the vertical direction, and the embodiment of the present application does not limit this.

[0079] In the embodiment of the present application, the injection assembly 3 includes an injection needle 31, and the substrate 71 drives the injection needle 31 to move in the direction of the injection hole close to the battery cell 6 to be injected. Here, the substrate 71 can drive the injection needle 31 to move in the direction of the glue nail 61 close to the battery cell 6 to be injected, pierce the glue nail 61 of the battery cell 6 to be injected, and form the injection hole of the battery cell 6 to be injected; of course, the substrate 71 can drive the injection needle 31 to move in the direction of the injection hole close to the battery cell 6 to be injected, pass through the injection hole of the battery cell 6 to be injected, and be used to inject liquid into the battery cell 6 to be injected. This embodiment of the present application is not limited. On this basis, when the substrate 71 drives the injection needle 31 to move in the direction of the injection hole close to the battery cell 6 to be injected, and is used to inject liquid into the battery cell 6 to be injected, the injection needle 31 cannot pierce the non-injection hole of the battery cell 6 to be injected, such as piercing the pole piece of the battery cell 6 to be injected, and the battery cell 6 to be injected is at risk of short circuit.

[0080] In the embodiment of the present application, the substrate 71 drives the injection needle 31 to move in the direction of the injection hole close to the battery cell 6 to be injected. Here, the substrate 71 drives the injection needle 31 to move in the direction of the injection hole close to the battery cell 6 to be injected, which is a vertical movement. Of course, the bracket 7 can also move in the horizontal direction relative to the base 2, and then drive the substrate 71, so that the substrate 71 drives the injection needle 31 to move in the direction of the injection hole close to the battery cell 6 to be injected, which is a horizontal movement. In other words, the bracket 7 and the substrate 71 on the bracket 7 can drive the injection needle to move in both the horizontal and vertical directions to drive the injection needle 31 close to the injection hole of the battery cell 6 to be injected. On this basis, the battery cell injection device can only inject liquid into one battery cell 6 to be injected, and the battery cell injection device can also inject liquid into multiple battery cells 6 to be injected, for example, a row of battery cells 6 to be injected arranged in the horizontal direction, or multiple rows of battery cells 6 to be injected arranged in the horizontal direction. This is not limited to the embodiment of the present application.

[0081] In the embodiment of the present application, when the battery cell 6 to be injected with liquid is a cylindrical battery cell, the vertical direction is the axial direction of the cylindrical battery cell, and the horizontal direction is the circumferential direction of the cylindrical battery cell; when the battery cell 6 to be injected with liquid is a square battery cell, the vertical direction is the height direction of the square battery cell, and the horizontal direction is the length direction and width direction of the square battery cell.

[0082] In the embodiment of the present application, a first limiting component 4 is provided on the carrying tray 1, a second limiting component 5 is provided on the injection component 3, and a third limiting component is provided between the carrying tray 1 and the base 2. The first limiting component 4, the second limiting component 5 and the third limiting component are used to limit the position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31. Here, the position of the battery cell 6 to be injected relative to the injection needle 31 includes the horizontal position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31 and the vertical position of the battery cell 6 to be injected relative to the injection needle 31. The first limiting component 4 can only indirectly limit the horizontal position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31; the first limiting component 4 can also only indirectly limit the horizontal position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31; the first limiting component 4 can also simultaneously indirectly limit the injection hole of the battery cell 6 to be injected relative to the injection needle 31. 1 along the vertical direction and the horizontal direction; similarly, the second limiting component 5 can only directly limit the horizontal direction position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31; the second limiting component 5 can only directly limit the vertical direction position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31; the second limiting component 5 can also directly limit the vertical direction and the horizontal direction position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31 at the same time; in addition, the third limiting component can only indirectly limit the vertical direction position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31, and the third limiting component can also only indirectly limit the horizontal direction position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31; the third limiting component can also indirectly limit the vertical direction and the horizontal direction position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31 at the same time, and this embodiment of the application is not limited to this.

[0083] The battery cell injection device provided in the embodiment of the present application, firstly, since the carrying tray 1 is used to support the battery cell 6 to be injected, by arranging a first limiting component 4 on the carrying tray 1, the position of the injection hole of the battery cell 6 to be injected can be limited on the carrying tray 1, thereby realizing the first limiting of the injection hole of the battery cell 6 to be injected; then, since the injection component 3 is used to inject liquid into the battery cell 6 to be injected, by arranging a second limiting component 5 on the injection component 3, the position of the injection component 3 and the injection hole of the battery cell 6 to be injected can be limited, thereby realizing the second limiting of the injection hole of the battery cell 6 to be injected; further, since the carrying tray 1 is placed on the base 2, by arranging a third limiting component between the carrying tray 1 and the base 2, the position between the carrying tray 1 and the base 2 can be limited, thereby realizing the third limiting of the injection hole of the battery cell 6 to be injected, and the position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31 is limited by triple limiting. Compared with the technical problem that the injection hole of the battery cell 6 to be injected is easily offset relative to the injection needle 31 and the injection needle 31 is easily pierced through the non-injection hole of the battery cell 6 to be injected due to the insufficient design of the limiting function of the related art, during the injection process, the present application limits the position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31 through triple limiting, thereby improving the position accuracy of the injection hole of the battery cell 6 to be injected relative to the injection needle 31. In other words, it reduces the possibility that the position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31 changes, resulting in the displacement of the injection hole of the battery cell 6 to be injected relative to the injection needle 31, thereby reducing the risk of the injection needle 31 piercing the non-injection hole of the battery cell 6 to be injected.

[0084] Here, it should be supplemented that the battery cell injection device provided in the embodiment of the present application can be applied to the first injection process of the battery cell 6 to be injected.

[0085] The present application provides a battery cell injection device, referring to Figure 7 , Figure 8 and Fig. 9 The carrying tray 1 includes a carrying cavity 11, which is used to carry and drag the battery cell 6 to be filled with liquid. The first limiting component 4 is arranged in the carrying cavity 11 to limit the position of the injection hole of the battery cell 6 to be filled with liquid relative to the carrying cavity 11.

[0086] In an embodiment of the present application, the carrying cavity 11 is used to support the battery cell 6 to be filled with liquid. Along the vertical direction, the size of the carrying cavity 11 can be one-fifth of the battery cell 6 to be filled with liquid, the size of the carrying cavity 11 can be one-third of the battery cell 6 to be filled with liquid, the size of the carrying cavity 11 can be one-half of the battery cell 6 to be filled with liquid, and so on. This embodiment of the present application does not limit this.

[0087] In the embodiment of the present application, the supporting cavity 11 is used to support the battery cell 6 to be filled with liquid. Here, the inner contour of the cavity wall of the supporting cavity 11 can be the same as the outer contour of the battery cell 6 to be filled with liquid. For example, the inner contour of the supporting cavity 11 is cylindrical, and the outer contour of the battery cell 6 to be filled with liquid is also cylindrical; of course, the inner contour of the cavity wall of the supporting cavity 11 may also be different from the outer contour of the battery cell 6 to be filled with liquid. For example, the inner contour of the supporting cavity 11 is a cube, and the outer contour of the battery cell 6 to be filled with liquid is cylindrical. This embodiment of the present application does not limit this.

[0088] The battery cell liquid filling device provided in the embodiment of the present application prevents the first limit component 4 from being exposed by disposing the first limit component 4 in the bearing cavity 11, thereby improving the aesthetics of the battery cell liquid filling device.

[0089] The present application provides a battery cell injection device, referring to Figure 5 and Figure 6 The first limiting component 4 includes an in-cavity limiting member 41, which is fixed to the carrying cavity 11. When the battery cell 6 to be injected is located in the carrying cavity 11, the in-cavity limiting member 41 is used to abut against the surface of the battery cell 6 to be injected along the horizontal direction.

[0090] In the embodiment of the present application, the intra-cavity limiting member 41 is fixed to the bearing cavity 11. Here, the intra-cavity limiting member 41 and the bearing cavity 11 can be fixed in a detachable manner, such as snap-fitting, or screwing. In this way, the disassembly and maintenance of the intra-cavity limiting member 41 can be convenient. Of course, the intra-cavity limiting member 41 and the bearing cavity 11 can also be fixed in a non-detachable manner, such as welding, etc. In this way, the possibility of the intra-cavity limiting member 41 moving in the bearing cavity 11 can be further reduced. The embodiment of the present application does not limit the manner in which the intra-cavity limiting member 41 and the bearing cavity 11 are fixed.

[0091] In an embodiment of the present application, when the battery cell 6 to be filled with liquid is located in the carrying cavity 11, the in-cavity limiting member 41 is used to abut against the surface of the battery cell 6 to be filled with liquid along the horizontal direction. Here, the in-cavity limiting member 41 is used to abut against the surface of the battery cell 6 to be filled with liquid along the horizontal direction in a line contact manner; the in-cavity limiting member 41 is used to abut against the surface of the battery cell 6 to be filled with liquid along the horizontal direction in a point contact manner; the in-cavity limiting member 41 is used to abut against the surface of the battery cell 6 to be filled with liquid along the horizontal direction in a surface contact manner, and the embodiment of the present application does not impose any restrictions on this.

[0092] In the embodiment of the present application, the intra-cavity limiting member 41 can be made of an elastic material, for example, the intra-cavity limiting member 41 is a plate-like structure made of rubber. The intra-cavity limiting member 41 can also be made of a non-elastic material, such as a plate-like structure made of wood. The embodiment of the present application does not impose any limitation on this.

[0093] The battery cell injection device provided in the embodiment of the present application fixes the intra-cavity limiter 41 to the carrying cavity 11 to reduce the possibility of the intra-cavity limiter 41 moving in the carrying cavity 11. When the battery cell 6 to be injected is located in the carrying cavity 11, the intra-cavity limiter 41 is used to abut against the surface of the battery cell 6 to be injected along the horizontal direction, thereby limiting the position of the injection hole of the battery cell 6 to be injected in the carrying cavity 11 relative to the injection needle 31 along the horizontal direction, thereby reducing the possibility of the injection hole of the battery cell 6 to be injected being offset relative to the injection needle 31.

[0094] The present application provides a battery cell injection device, referring to Figure 7 , Figure 8 and Fig. 9 There are multiple in-cavity limiting members 41, and the multiple in-cavity limiting members 41 are distributed in the horizontal direction. A first limiting gap is formed between the multiple in-cavity limiting members 41. When the battery cell 6 to be injected with liquid is located in the first limiting gap, the multiple in-cavity limiting members 41 are used to abut against the surface of the battery cell 6 to be injected with liquid in the horizontal direction.

[0095] In the embodiment of the present application, there can be two intra-cavity limit members 41, and the two intra-cavity limit members 41 can be distributed in the bearing cavity 11 with an interval of 180 degrees in the horizontal direction; there can also be three intra-cavity limit members 41, and two adjacent intra-cavity limit members 41 among the three intra-cavity limit members 41 can be distributed in the bearing cavity 11 with an interval of 120 degrees in the horizontal direction, or two of the three intra-cavity limit members 41 can be distributed in the bearing cavity 11 with an interval of 100 degrees in the horizontal direction, and two intra-cavity limit members 41 can be distributed in the bearing cavity 11 with an interval of 260 degrees in the horizontal direction. This embodiment of the present application does not impose any restrictions on this.

[0096] In an embodiment of the present application, the shape of the first limiting gap can be exactly the same as the outer contour of the battery cell 6 to be filled with liquid. For example, the shape of the first limiting gap is a cylinder, and the outer contour of the battery cell 6 to be filled with liquid is also a cylinder. Of course, the shape of the first limiting gap can also be different from the outer contour of the battery cell 6 to be filled with liquid. For example, the shape of the first limiting gap is a cube, and the outer contour of the battery cell 6 to be filled with liquid is a cylinder. This embodiment of the present application does not limit this.

[0097] The battery cell injection device provided in the embodiment of the present application is equipped with multiple in-cavity limiting members 41, and when the battery cell 6 to be injected is located in the first limiting gap, the multiple in-cavity limiting members 41 are all used to abut against the surface of the battery cell 6 to be injected along the horizontal direction, so as to further limit the position of the injection hole of the battery cell 6 to be injected in the supporting cavity 11 relative to the injection needle 31 along the horizontal direction, thereby further reducing the possibility of the injection hole of the battery cell 6 to be injected being offset relative to the injection needle 31.

[0098] The present application provides a battery cell injection device, referring to Figure 8 and Fig. 9There are two intra-cavity limiting members 41. In the horizontal direction, the abutting position of one intra-cavity limiting member 41 used to abut against the surface of the battery cell 6 to be injected with liquid in the horizontal direction is spaced at an angle less than 180 degrees from the abutting position of the other intra-cavity limiting member 41 used to abut against the surface of the battery cell 6 to be injected with liquid in the horizontal direction. The first limiting assembly 4 also includes a connecting member, which is arranged on the side close to each other between the two intra-cavity limiting members 41.

[0099] In the embodiment of the present application, along the horizontal direction, the angle between the abutment position of one intra-cavity limiting member 41 used to abut against the surface of the battery cell 6 to be injected with liquid along the horizontal direction and the abutment position of another intra-cavity limiting member 41 used to abut against the surface of the battery cell 6 to be injected with liquid along the horizontal direction is less than 180 degrees, indicating that the two intra-cavity limiting members 41 intersect.

[0100] In the embodiment of the present application, the first limiting component 4 also includes a connecting member, which is arranged on the side where the two intra-cavity limiting members 41 are close to each other. The connecting member can be a rotating shaft, and rotating shaft holes are respectively arranged on the side where the two intra-cavity limiting members 41 are close to each other. The rotating shaft extends into the two rotating shaft holes in turn to connect the two intra-cavity limiting members 41. At the same time, of course, the two intra-cavity limiting members 41 can also rotate relative to each other through the rotating shaft to adjust the size of the first limiting gap; the connecting member can also be a viscous glue, which is arranged on the side where the two intra-cavity limiting members 41 are close to each other to connect the two intra-cavity limiting members 41.

[0101] The battery cell injection device provided in the embodiment of the present application only sets two intra-cavity limiting members 41, and the angle between the abutment position of one intra-cavity limiting member 41 used for the surface of the battery cell 6 to be injected along the horizontal direction and the abutment position of the other intra-cavity limiting member 41 used for the surface of the battery cell 6 to be injected along the horizontal direction is less than 180 degrees. At the same time, a connecting member is set on the side close to each other between the two intra-cavity limiting members 41, similar to a V-shaped clamp, to clamp the surface of the battery cell 6 to be injected along the horizontal direction. The injection hole of the battery cell 6 to be injected can be limited in the horizontal direction relative to the injection needle 31 in the carrying cavity 11 only by the V-shaped structure, which has a simple structure and a technical effect that is easy to achieve.

[0102] The present application provides a battery cell injection device, referring to Fig. 9 The battery cell 6 to be injected with liquid is a cylindrical battery cell, and the surface of the in-cavity limiting member 41 that is used to abut against the cylindrical battery cell in the horizontal direction is an arc surface, and the arc surface is used to adapt to the arc surface of the cylindrical battery cell in the horizontal direction.

[0103] In the embodiment of the present application, the surface of the intra-cavity limit member 41 that is used to abut against the cylindrical battery cell in the horizontal direction is an arc surface, and the arc surface is a concave arc surface, which is adapted to the convex arc surface of the cylindrical battery cell. On this basis, the arc surface is used to adapt to the arc surface of the cylindrical battery cell in the horizontal direction, which means that the arc surface and the arc surface of the cylindrical battery cell in the horizontal direction are in surface contact, not point contact or line contact.

[0104] The battery cell liquid injection equipment provided in the embodiment of the present application makes the surface of the intra-cavity limiter 41 abutting against the cylindrical battery cell in the horizontal direction into an arc surface, so that the arc surface is used to adapt to the arc surface of the cylindrical battery cell in the horizontal direction, and the intra-cavity limiter 41 is in surface contact with the surface of the cylindrical battery cell in the horizontal direction, so as to improve the reliability of the intra-cavity limiter 41 abutting against the surface of the cylindrical battery cell in the horizontal direction.

[0105] The present application provides a battery cell injection device, referring to Figure 3 and Fig.10 The second limiting component 5 includes a connecting plate 51 and a horizontal side limiting member 52. The connecting plate 51 is connected to the injection component 3. A first through hole is opened on the connecting plate 51, and the first through hole is used for the injection needle 31 to pass through. The horizontal side limiting member 52 is arranged on the side of the connecting plate 51 facing the supporting tray 1. When the substrate 71 drives the injection needle 31 to move in the direction close to the injection hole of the battery cell 6 to be injected, the horizontal side limiting member 52 is used to abut against the surface of the battery cell 6 to be injected along the horizontal direction.

[0106] In the embodiment of the present application, the connecting plate 51 is connected to the injection component 3. Here, the connection between the connecting plate 51 and the injection component 3 can be an elastic connection, for example, the connecting plate 51 and the injection component 3 are connected by a spring. Of course, the connection between the connecting plate 51 and the injection component 3 can also be a rigid connection, for example, the connecting plate 51 and the injection component 3 are connected by a connecting column; this is not limited to the embodiment of the present application.

[0107] In the embodiment of the present application, the horizontal side limiter 52 is arranged on the side of the connecting plate 51 facing the carrying tray 1. Here, the horizontal side limiter 52 can be integrally formed with the connecting plate 51, so that it does not need to be installed later, saving installation costs; of course, the horizontal side limiter 52 can also be detachably connected to the connecting plate 51, so that it can be easily processed and manufactured, and rapid model change can be achieved, thereby improving the compatibility of the battery cell injection equipment. The embodiment of the present application does not limit this. In an achievable method provided in the embodiment of the present application, a first threaded hole 531 is provided on the horizontal side limiter 52, and a second threaded hole is provided on the connecting plate 51. The threaded connector extends into the first threaded hole 531 and the second threaded hole in turn to connect the horizontal side limiter 52 to the connecting plate 51.

[0108] On this basis, the horizontal side limiter 52 is arranged on the side of the connecting plate 51 facing the load-bearing tray 1. Here, the horizontal side limiter 52 can be directly connected to the side of the connecting plate 51 facing the load-bearing tray 1. Of course, the horizontal side limiter 52 can also be indirectly connected to the side of the connecting plate 51 facing the load-bearing tray 1. This embodiment of the present application does not limit this. In an implementable manner provided in the embodiment of the present application, the horizontal side limiter 52 is indirectly connected to the side of the connecting plate 51 facing the load-bearing tray 1. Specifically, the second limiter assembly 5 also includes a transition plate 53, which is detachably connected to the connecting plate 51. Of course, the transition plate 53 is also provided with a fourth through hole coaxial with the first through hole. The horizontal side limiter 52 is arranged on the side of the transition plate 53 facing the load-bearing tray 1. The transition plate 53 is provided with a first threaded hole 531, and the connecting plate 51 is provided with a second threaded hole. The threaded connector extends into the first threaded hole 531 and the second threaded hole in sequence to connect the horizontal side limiter 52 to the connecting plate 51.

[0109] In the embodiment of the present application, when the substrate 71 drives the injection needle 31 to move in the direction close to the injection hole of the battery cell 6 to be injected, the horizontal side limiter 52 is used to abut against the surface of the battery cell 6 to be injected along the horizontal direction. Here, the horizontal side limiter 52 can be used to abut against the surface of the battery cell 6 to be injected along the horizontal direction in the form of line contact; the horizontal side limiter 52 can be used to abut against the surface of the battery cell 6 to be injected along the horizontal direction in the form of point contact; the horizontal side limiter 52 can also be used to abut against the surface of the battery cell 6 to be injected along the horizontal direction in the form of surface contact, and the embodiment of the present application does not impose any restrictions on this.

[0110] The battery cell injection device provided in the embodiment of the present application connects the connecting plate 51 with the injection assembly 3. A first through hole is opened on the connecting plate 51. The first through hole is used for the injection needle 31 to pass through, thereby establishing a connection between the position of the connecting plate 51 and the injection needle 31. On this basis, the horizontal side limiter 52 is arranged on the side of the connecting plate 51 facing the supporting tray 1, so that a positional relationship is established between the injection needle 31 and the horizontal side limiter 52. When the substrate 71 drives the injection needle 31 to move in a direction close to the injection hole of the battery cell 6 to be injected, the horizontal side limiter 52 is used to abut against the surface of the battery cell 6 to be injected along the horizontal direction, thereby limiting the position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31 along the horizontal direction, thereby reducing the possibility of the injection hole of the battery cell 6 to be injected being offset relative to the injection needle 31.

[0111] The present application provides a battery cell injection device, referring to Fig.10 , Fig.11 , Fig.12 , Fig.13 and Fig.14There are multiple horizontal side limit members 52, which are distributed on the connecting plate 51 along the horizontal direction. The multiple horizontal side limit members 52 are arranged to form a second limit gap. When the battery cell 6 to be filled with liquid is located in the second limit gap, the multiple horizontal side limit members 52 are used to abut against the surface of the battery cell 6 to be filled with liquid along the horizontal direction.

[0112] In the embodiment of the present application, there can be two horizontal side limit members 52, and the two horizontal side limit members 52 can be distributed on the connecting plate 51 at an interval of 180 degrees in the horizontal direction; there can also be three horizontal side limit members 52, and two adjacent intra-cavity limit members 41 among the three horizontal side limit members 52 can be distributed on the connecting plate 51 at an interval of 120 degrees in the horizontal direction; or two of the three horizontal side limit members 52 can be distributed on the connecting plate 51 at an interval of 100 degrees in the horizontal direction, and the other two horizontal side limit members 52 can be distributed on the connecting plate 51 at an interval of 260 degrees in the horizontal direction. This embodiment of the present application does not impose any restrictions on this.

[0113] In the embodiment of the present application, the shape of the second limiting gap can be exactly the same as the outer contour of the battery cell 6 to be injected with liquid, for example, the shape of the second limiting gap is a cylinder, and the outer contour of the battery cell 6 to be injected with liquid is also a cylinder; of course, the shape of the second limiting gap can also be different from the outer contour of the battery cell 6 to be injected with liquid, for example, the shape of the second limiting gap is a cube, and the outer contour of the battery cell 6 to be injected with liquid is a cylinder, and the embodiment of the present application does not limit this.

[0114] The battery cell filling device provided in the embodiment of the present application is equipped with multiple horizontal side limiters 52, and when the battery cell 6 to be filled with liquid is located in the second limit gap, the multiple horizontal side limiters 52 are all used to abut against the surface of the battery cell 6 to be filled with liquid along the horizontal direction, so as to further limit the position of the injection hole of the battery cell 6 to be filled with liquid relative to the injection needle 31 along the horizontal direction, thereby further reducing the possibility of the injection hole of the battery cell 6 to be filled with liquid being offset relative to the injection needle 31.

[0115] The present application provides a battery cell injection device, Fig.11 , Fig.13 and Fig.14 A guide slope 521 is provided on a side of the horizontal side limiting member 52 close to the carrying tray 1 , and the guide slope 521 is inclined toward the second limiting gap.

[0116] In the embodiment of the present application, the side of the guiding inclined surface 521 facing the second limiting gap can be a smooth plane or a non-smooth plane, and the embodiment of the present application does not limit this.

[0117] The battery cell filling device provided in the embodiment of the present application is provided with a guiding inclined surface 521 inclined toward the second limiting gap on the side of the horizontal side limiting member 52 close to the carrying tray 1, so as to facilitate the battery cell 6 to be filled to enter the second limiting gap smoothly.

[0118] The present application provides a battery cell injection device, referring to Fig.11 The battery cell 6 to be injected with liquid is a cylindrical battery cell, and the surface of the horizontal side limiter 52 that is used to abut against the cylindrical battery cell in the horizontal direction is an arc surface, and the arc surface is used to adapt to the arc surface of the cylindrical battery cell in the horizontal direction.

[0119] In the embodiment of the present application, the surface of the horizontal side limit member 52 that is used to abut against the cylindrical battery cell in the horizontal direction is an arc surface, and the arc surface is a concave arc surface, which is adapted to the convex arc surface of the cylindrical battery cell. On this basis, the arc surface is used to adapt to the arc surface of the cylindrical battery cell in the horizontal direction, which means that the arc surface and the arc surface of the cylindrical battery cell in the horizontal direction are in surface contact, not point contact or line contact.

[0120] The battery cell liquid injection equipment provided in the embodiment of the present application sets the surface of the horizontal side limiter 52 that abuts against the cylindrical battery cell in the horizontal direction to an arc surface, so that the arc surface is used to adapt to the arc surface of the cylindrical battery cell in the horizontal direction, so that the horizontal side limiter 52 is in surface contact with the surface of the cylindrical battery cell in the horizontal direction, so as to improve the reliability of the horizontal side limiter 52 abutting against the surface of the cylindrical battery cell in the horizontal direction.

[0121] The present application provides a battery cell injection device, referring to Fig.10 and Fig.11 There are two horizontal side limiting members 52 , and the two horizontal side limiting members 52 are distributed on the connecting plate 51 at an interval of 180 degrees along the horizontal direction.

[0122] The battery cell filling device provided in the embodiment of the present application only sets two horizontal side limiters 52, and the two horizontal side limiters 52 are distributed on the connecting plate 51 at an interval of 180 degrees in the horizontal direction. This can achieve the limitation of the filling hole of the battery cell 6 to be filled with liquid relative to the filling needle 31 in the horizontal direction, and has technical effects such as simple structure and easy implementation.

[0123] An embodiment of the present application provides a battery cell filling device, wherein the second limiting component 5 also includes a hole limiting member 54, and the hole limiting member 54 is arranged on the side of the connecting plate 51 facing the supporting tray 1. When the substrate 71 drives the filling needle 31 to move in the direction of the filling hole close to the battery cell 6 to be filled, the hole limiting member 54 is used to abut against the surface of the battery cell 6 to be filled in the vertical direction.

[0124] In the embodiment of the present application, the hole position limiter 54 is arranged on the side of the connecting plate 51 facing the carrying tray 1. Here, the hole position limiter 54 can be integrally formed with the connecting plate 51, so that it does not need to be installed later, saving installation costs; of course, the hole position limiter 54 can also be detachably connected to the connecting plate 51, so that it can be easily processed and manufactured, and rapid mold change can be achieved, thereby improving the compatibility of the battery cell injection equipment. This embodiment of the present application is not limited to this. In an achievable method provided in the embodiment of the present application, a third threaded hole is provided on the hole position limiter 54, and a fourth threaded hole is provided on the connecting plate 51. The threaded connector extends into the third threaded hole and the fourth threaded hole in turn to connect the hole position limiter 54 to the connecting plate 51.

[0125] On this basis, the hole position limiter 54 is arranged on the side of the connecting plate 51 facing the carrying tray 1. Of course, the hole position limiter 54 can be directly connected to the side of the connecting plate 51 facing the carrying tray 1. Of course, the hole position limiter 54 can also be indirectly connected to the side of the connecting plate 51 facing the carrying tray 1. This embodiment of the present application does not limit this. In an implementable manner provided in the embodiment of the present application, the hole position limiter 54 is also arranged on the transition plate 53 where the horizontal side limiter 52 is arranged.

[0126] In the embodiment of the present application, when the substrate 71 drives the injection needle 31 to move in the direction of the injection hole close to the battery cell 6 to be injected, the hole limiter 54 is used to abut against the surface of the battery cell 6 to be injected along the vertical direction. Here, the hole limiter 54 can be used to abut against the surface of the battery cell 6 to be injected along the vertical direction in a line contact manner; the hole limiter 54 can be used to abut against the surface of the battery cell 6 to be injected along the vertical direction in a point contact manner; the hole limiter 54 can be used to abut against the surface of the battery cell 6 to be injected along the vertical direction in a surface contact manner, and the embodiment of the present application does not impose any restrictions on this.

[0127] The battery cell filling device provided in the embodiment of the present application is configured by setting a hole position limiter 54 on the side of the connecting plate 51 facing the supporting tray 1, and when the base plate 71 drives the filling needle 31 to move in the direction close to the filling hole of the battery cell 6 to be filled, the hole position limiter 54 is used to abut against the surface of the battery cell 6 to be filled in the vertical direction to limit the position of the filling hole of the battery cell 6 to be filled relative to the filling needle 31 in the vertical direction, thereby reducing the possibility of the filling hole of the battery cell 6 to be filled being offset relative to the filling needle 31.

[0128] The present application provides a battery cell injection device, referring to Fig.11 and Fig.15 A second through hole 541 is provided on the hole position limiting member 54, the axis of the second through hole 541 is colinear with the axis of the first through hole, the second through hole 541 is used for the injection needle 31 to pass through, and the hole position limiting member 54 is used to abut against the glue nail 61 of the battery cell 6 to be injected along the vertical direction.

[0129] The battery cell injection device provided in the embodiment of the present application has a second through hole 541 formed on the hole limiter 54, the second through hole 541 is used for the injection needle 31 to pass through, and the hole limiter 54 is used to abut against the glue nail 61 of the battery cell 6 to be injected along the vertical direction, so that the injection needle 31 can accurately pierce the glue nail 61 of the battery cell 6 to be injected, thereby completing the injection.

[0130] The present application provides a battery cell injection device, referring to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The injection assembly 3 also includes a mounting plate 32 and a injection cup 33 . The mounting plate 32 is connected to the substrate 71 . The injection cup 33 is mounted on the substrate 71 . The injection cup 33 is connected to the injection needle 31 . The mounting plate 32 is elastically connected to the connecting plate 51 .

[0131] In the embodiment of the present application, the injection cup 33 is connected to the injection needle 31. Here, the injection cup 33 and the injection needle 31 can be connected in a non-detachable manner, such as welding, etc.; of course, the injection cup 33 and the injection needle 31 can also be connected in a detachable manner, such as threaded connection, etc., so that it is convenient for later replacement and maintenance.

[0132] In the embodiment of the present application, the mounting plate 32 is elastically connected to the connecting plate 51. Here, the mounting plate 32 and the connecting plate 51 can be connected by a spring. Of course, the mounting plate 32 and the connecting plate 51 can be connected by rubber, and this embodiment of the present application does not limit this.

[0133] The battery cell injection device provided in the embodiment of the present application elastically connects the mounting plate 32 with the connecting plate 51. After the injection is completed, when the injection needle 31 leaves the glue nail 61 of the battery cell 6 to be injected, the hole limiter 54 can also press the glue nail 61 to reduce the possibility of the glue nail 61 falling off. Specifically, when the base plate 71 drives the injection needle 31 to move in a direction close to the battery cell 6 to be injected, the spring is compressed, the horizontal side limiter 52 is used to abut against the surface of the battery cell 6 to be injected in the horizontal direction, and the hole limiter 54 is used to abut against the surface of the battery cell 6 to be injected in the vertical direction. The surfaces are abutted in the vertical direction, and the injection needle 31 passes through the first through hole and the second through hole 541 in sequence to inject liquid into the battery cell 6 to be injected; when the substrate 71 drives the injection needle 31 to move in a direction away from the battery cell 6 to be injected, the injection needle 31 is connected to the mounting plate 32, and the mounting plate 32 is directly connected to the substrate 71. At this time, the injection needle 31 leaves first, and the spring is previously compressed. When the mounting plate 32 leaves, the spring needs to first return to its original state, and then move synchronously with the mounting plate 32, so that the hole limiter 54 leaves after the injection needle 31.

[0134] The present application provides a battery cell injection device, referring to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The third limiting component includes a limiting groove set on the base 2 and a limiting protrusion set on the carrying tray 1. When the carrying tray 1 is placed on the base 2, the limiting protrusion is adapted to the limiting groove to limit the position of the carrying tray 1 relative to the base 2.

[0135] The battery cell filling equipment provided in the embodiment of the present application, by setting a limiting groove on the base 2 and setting the direction of the limiting protrusion on the carrying tray 1, makes the limiting protrusion and the limiting groove fit together, that is, it can limit the position of the carrying tray 1 relative to the base 2, and has technical effects such as simple structure and easy implementation.

[0136] An embodiment of the present application provides a battery cell liquid injection device, wherein the third limiting assembly further includes an adhesive member, which is disposed on at least one of the limiting groove and the limiting protrusion, and the carrying tray 1 and the base 2 are bonded together by the adhesive member.

[0137] The battery cell filling device provided in the embodiment of the present application provides an adhesive on at least one of the limiting groove and the limiting protrusion, and the carrying tray 1 and the base 2 are bonded by the adhesive, thereby improving the reliability of the limiting between the carrying tray 1 and the base 2.

[0138] In an implementable method provided in an embodiment of the present application, the carrying tray 1 is first placed on the base 2, so that the limiting protrusion on the carrying tray 1 is adapted to the limiting groove on the base 2, and at the same time, the adhesive located on at least one of the limiting groove and the limiting protrusion bonds the carrying tray 1 to the base 2 to achieve the limiting of the carrying tray 1 and the base 2; then the battery cell 6 to be injected is placed in the carrying cavity 11 of the carrying tray 1, at this time, the cavity limiting member 41 located in the carrying cavity 11 is used to abut against the surface of the battery cell 6 to be injected along its horizontal direction, so as to achieve the limiting of the injection hole of the battery cell 6 to be injected relative to the carrying cavity 11 in the horizontal direction; then the substrate 71 drives the injection needle 31 of the injection assembly 3 to be injected along the vertical direction During the downward movement, the horizontal side limiter 52 is used to abut against the horizontal surface of the battery cell 6 to be injected, and the hole limiter 54 is used to abut against the glue nail 61 of the battery cell 6 to be injected. The injection needle 31 passes through the first through hole and the second through hole 541 in sequence, pierces the glue nail 61, and injects liquid into the battery cell 6 to be injected, so as to ensure that the injection needle 31 accurately penetrates the depth of the injection hole to avoid the risk of short circuit caused by piercing the electrode, and at the same time, it can avoid the situation where the injection needle 31 is crooked; after the injection is completed, the injection needle 31 is withdrawn from the second through hole 541, and the hole limiter 54 is still used to abut against the glue nail 61 of the battery cell 6 to be injected along the vertical direction, so as to reduce the risk of the glue nail 61 falling off.

[0139] The present application provides a battery cell injection device, referring to Figure 3, Figure 4 , Figure 5 , Figure 6 and Fig.15 The injection assembly 3 also includes a vacuum pump, a liquid supply pipe, an on-off valve 34 and a blocking member 35 that moves along the substrate 71. The vacuum pump and the liquid supply pipe are respectively connected to the injection cup 33. The on-off valve 34 is arranged between the injection cup 33 and the injection needle 31 to control the on-off of the injection cup 33 and the injection needle 31. The injection cup 33 has a third through hole 331, and the blocking member 35 is used to block the third through hole 331.

[0140] In the embodiment of the present application, the injection assembly 3 includes a blocking member 35 that moves along the substrate 71. Here, the blocking member 35 can be driven by a cylinder or electrically driven, which is not limited in the embodiment of the present application.

[0141] In the embodiment of the present application, the on-off valve 34 is arranged between the injection cup 33 and the injection needle 31. Here, the on-off valve 34 can be arranged on the injection cup 33. Of course, the on-off valve 34 can also be arranged on the injection needle 31. This embodiment of the present application does not limit this. In an implementable manner provided in the embodiment of the present application, the on-off valve 34 is arranged on the injection cup 33.

[0142] Taking the on-off valve 34 being arranged on the liquid injection cup 33 as an example, the on-off valve 34 can be arranged on the liquid injection cup 33 in an undetachable manner, for example, by welding; of course, the on-off valve 34 can also be arranged on the liquid injection cup 33 in a detachable manner, for example, by screwing, and the embodiment of the present application does not limit this. In an implementable manner provided in the embodiment of the present application, the on-off valve 34 is detachably arranged on the liquid injection cup 33 to facilitate later replacement and maintenance.

[0143] In the embodiment of the present application, the blocking member 35 is used to block the third through hole 331. Here, the blocking member 35 and the third through hole 331 are interference fit. In addition, in order to facilitate installation and sealing effect, the portion of the blocking member 35 that is in contact with the wall of the third through hole 331 is made of elastic material, for example, made of rubber material.

[0144] In the embodiment of the present application, a mounting portion 351 is provided on the blocking member 35 , and the mounting portion 351 is used to be acted upon by an installation tool, for example, the mounting portion 351 is clamped by the installation tool.

[0145] The battery cell liquid injection equipment provided in the embodiment of the present application connects the vacuum pump and the liquid supply pipe to the liquid injection cup 33 respectively, and the on-off valve 34 is arranged between the liquid injection cup 33 and the liquid injection needle 31 to control the on-off of the liquid injection cup 33 and the liquid injection needle 31. At the same time, there is a third through hole 331 on the liquid injection cup 33, and the sealing member 35 is used to seal the third through hole 331, so as to perform alternating positive and negative pressure cycles to complete the liquid injection and improve the liquid injection efficiency. Specifically, when the substrate 71 drives the injection needle 31 to move in the direction close to the injection hole of the battery cell 6 to be injected, the cavity limiter 41 is used to abut against the surface of the battery cell 6 to be injected along the horizontal direction, the horizontal side limiter 52 is used to abut against the surface of the battery cell 6 to be injected along the horizontal direction, and the hole limiter 54 is used to abut against the surface of the battery cell 6 to be injected along the vertical direction. The injection needle 31 passes through the first through hole and the second through hole 541 in sequence to pierce the glue nail 61 of the battery cell 6 to be injected and enter the interior of the battery cell 6 to be injected. The blocking member 35 moves in the direction close to the injection cup 33 to block the third through hole 331 to achieve sealing. At this time, the on-off valve 34 is opened, and the vacuum pump is used to vacuum the battery cell 6 to be injected. After the pressure is exhausted, The on-off valve 34 is closed, and a negative pressure environment is formed inside the battery cell 6 to be injected. At this time, the true pressure hole of the injection cup 33 is vented to normal pressure, and the sealing member 35 moves in the vertical direction and away from the injection cup 33, and then supplies liquid to the injection cup 33 through the liquid supply pipe. When the liquid preparation is completed, the sealing member 35 moves in the vertical direction and close to the injection cup 33, and blocks the third through hole 331 again, and opens the on-off valve 34. Since the battery cell 6 to be injected is in a negative pressure, the electrolyte in the injection cup 33 will be sucked into the battery cell 6 to be injected. Since there will be residual electrolyte in the injection cup 33, the vacuum pump then provides positive pressure to the injection cup 33 to blow the residual electrolyte in the injection cup 33 into the battery cell 6 to be injected.

[0146] The present application provides a battery cell injection device, referring to Figure 3 , Figure 4 , Figure 5 and Figure 6 The liquid injection assembly 3 also includes a blocking cylinder 36 , which is disposed on the substrate 71 . The blocking cylinder 36 is connected to the blocking member 35 to drive the blocking member 35 to move on the substrate 71 .

[0147] The battery cell liquid injection device provided in the embodiment of the present application can drive the blocking member 35 to move on the substrate 71 only by using the blocking cylinder 36, and has a simple structure and easy-to-implement technical effect.

[0148] The present application provides a battery cell injection device, referring to Figure 3 , Figure 4 , Figure 5 and Figure 6A sliding guide rail 72 that moves in a vertical direction is provided on the base 2 , and a slider 711 is provided on the base plate 71 . The slider 711 is slidably connected to the sliding guide rail 72 .

[0149] In the embodiment of the present application, a slider 711 may also be provided on the base 2 , and a sliding guide rail 72 that moves along the vertical direction is provided on the base plate 71 , and the slider 711 is slidably connected to the sliding guide rail 72 .

[0150] The battery cell injection device provided in the embodiment of the present application reduces the contact area between the substrate 71 and the base 2 by enabling the slider 711 to be slidably connected to the sliding guide rail 72, thereby reducing the force required for the substrate 71 to move relative to the base 2 to overcome the friction between the two.

[0151] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in 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 the various embodiments can be combined in any way.

Claims

1. A battery cell injection device, characterized in that: include: A carrying tray, used to support the battery cells to be filled with liquid; a base, on which the carrying tray is placed; A bracket, the bracket is connected to the base, and the bracket includes a base plate that moves in a vertical direction; A liquid injection component, the liquid injection component is arranged on the substrate, the liquid injection component includes a liquid injection needle, and the substrate drives the liquid injection needle to move in a direction close to the liquid injection hole of the battery cell to be injected; A first limiting assembly is provided on the carrying tray, a second limiting assembly is provided on the injection assembly, and a third limiting assembly is provided between the carrying tray and the base, wherein the first limiting assembly, the second limiting assembly and the third limiting assembly are used to limit the position of the injection hole of the battery cell to be injected relative to the injection needle; The second limiting component includes a connecting plate, a horizontal side limiting member and a hole limiting member. The connecting plate is connected to the injection component. A first through hole is opened on the connecting plate. The first through hole is used for the injection needle to pass through. The horizontal side limiting member and the hole limiting member are both arranged on the side of the connecting plate facing the supporting tray. When the base plate drives the injection needle to approach the injection hole, the horizontal side limiting member is used to abut against the surface of the battery cell to be injected along the horizontal direction, and the hole limiting member is used to abut against the surface of the battery cell to be injected along the vertical direction.

2. The battery cell injection device according to claim 1, characterized in that: The carrying tray comprises a carrying cavity, which is used to support the battery cell to be filled with liquid. The first limiting component is arranged in the carrying cavity to limit the position of the injection hole of the battery cell to be filled with liquid relative to the carrying cavity.

3. The battery cell injection device according to claim 2, characterized in that: The first limiting assembly includes an in-cavity limiting member, which is fixed to the carrying cavity. When the battery cell to be filled with liquid is located in the carrying cavity, the in-cavity limiting member is used to abut against the surface of the battery cell to be filled with liquid along the horizontal direction.

4. The battery cell injection device according to claim 3, characterized in that: There are multiple in-cavity limiting members, which are distributed along the horizontal direction, and a first limiting gap is formed between the multiple in-cavity limiting members. When the liquid battery cell to be injected is located in the first limiting gap, the multiple in-cavity limiting members are used to abut against the surface of the liquid battery cell to be injected along the horizontal direction.

5. The battery cell injection device according to claim 4, characterized in that: There are two in-cavity limit members, and along the horizontal direction, the angle between the abutting position of one in-cavity limit member used to abut against the surface of the battery cell to be filled with liquid along the horizontal direction and the abutting position of the other in-cavity limit member used to abut against the surface of the battery cell to be filled with liquid along the horizontal direction is less than 180 degrees, and the first limiting assembly also includes a connecting member, which is arranged on the side close to each other between the two in-cavity limit members.

6. The battery cell injection device according to claim 3, characterized in that: The battery cell to be injected with liquid is a cylindrical battery cell, and the surface of the in-cavity limiting member used to abut against the cylindrical battery cell along the horizontal direction is a curved surface, and the curved surface is used to adapt to the curved surface of the cylindrical battery cell along the horizontal direction.

7. The battery cell injection device according to claim 1, characterized in that: There are multiple horizontal side limit members, which are distributed on the connecting plate along the horizontal direction. The multiple horizontal side limit members are arranged to form a second limit gap. When the battery cell to be filled with liquid is located in the second limit gap, the multiple horizontal side limit members are used to abut against the surface of the battery cell to be filled with liquid along the horizontal direction.

8. The battery cell injection device according to claim 7, characterized in that: A guide slope is provided on a side of the horizontal side limiting member close to the carrying tray, and the guide slope is inclined toward the second limiting gap.

9. The battery cell injection device according to claim 1, characterized in that: The battery cell to be filled with liquid is a cylindrical battery cell, and the surface of the horizontal side limiter used to abut against the cylindrical battery cell along the horizontal direction is a curved surface, and the curved surface is used to adapt to the curved surface of the cylindrical battery cell along the horizontal direction.

10. The battery cell injection device according to claim 7, characterized in that: There are two horizontal side limiters, and the two horizontal side limiters are distributed on the connecting plate at an interval of 180 degrees along the horizontal direction.

11. The battery cell injection device according to claim 1, characterized in that: The hole position limiting member is provided with a second through hole, the axis of the second through hole is colinear with the axis of the first through hole, the second through hole is used for the injection needle to pass through, and the hole position limiting member is used to abut against the glue nail of the battery cell to be injected along the vertical direction.

12. The battery cell injection device according to claim 1, characterized in that: The injection assembly also includes a mounting plate and a injection cup, wherein the mounting plate is connected to the base plate, the injection cup is mounted on the base plate, the injection cup is connected to the injection needle, and the mounting plate is elastically connected to the connecting plate.

13. The battery cell injection device according to any one of claims 1 to 6, characterized in that: The third limiting assembly includes a limiting groove provided on the base and a limiting protrusion provided on the carrying tray. When the carrying tray is placed on the base, the limiting protrusion is matched with the limiting groove to limit the position of the carrying tray relative to the base.

14. The battery cell injection device according to claim 13, characterized in that: The third limiting assembly further includes an adhesive member, which is disposed on at least one of the limiting groove and the limiting protrusion, and the carrying tray is bonded to the base via the adhesive member.

15. The battery cell injection device according to claim 12, characterized in that: The liquid injection assembly also includes a vacuum pump, a liquid supply pipe, an on-off valve and a sealing member moving along the substrate. The vacuum pump and the liquid supply pipe are respectively connected to the liquid injection cup. The on-off valve is arranged between the liquid injection cup and the liquid injection needle to control the on-off of the liquid injection cup and the liquid injection needle. The liquid injection cup is provided with a third through hole, and the sealing member is used to seal the third through hole.

16. The battery cell injection device according to claim 15, characterized in that: The liquid injection assembly further includes a blocking cylinder, which is disposed on the substrate and connected to the blocking member to drive the blocking member to move on the substrate.

17. A battery cell production line, characterized in that: include: A conveyor line, the conveyor line is used to convey the battery cells to be injected with liquid; handling organization; The battery cell filling equipment according to any one of claims 1 to 16, wherein the transport mechanism is used to transport the battery cells to be filled located on the conveyor line to a carrying tray of the battery cell filling equipment.

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