Cell electrolyte injection device and cell production line

Abstract

A cell electrolyte injection device comprises a bearing tray (1), a base (2), a support (7), and an electrolyte injection assembly (3). The bearing tray (1) is configured to support cells (6) to be electrolyte-injected, and the bearing tray (1) is placed on the base (2); the support (7) is connected to the base (2), and the support (7) comprises a base plate (71) moving in a vertical direction; the electrolyte injection assembly (3) is arranged on the base plate (71), and the electrolyte injection assembly (3) comprises electrolyte injection needles (31); the base plate (71) drives each electrolyte injection needle (31) to move toward an electrolyte injection hole of the corresponding cell (6) to be electrolyte-injected; first limiting assemblies (4) are arranged on the bearing tray (1), second limiting assemblies (5) are arranged on the electrolyte injection assembly (3), and a third limiting assembly is arranged between the bearing tray (1) and the base (2); and the first limiting assemblies (4), the second limiting assemblies (5), and the third limiting assembly are configured to limit the positions of electrolyte injection holes of the cells (6) to be electrolyte-injected relative to the corresponding electrolyte injection needles (31).

Description

A battery cell electrolyte injection device and a battery cell production line

[0001] Cross-references to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202510043391.3, filed on January 10, 2025, entitled “A Battery Cell Liquid Injection Device and Battery Cell Production Line”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of battery technology, and in particular to a cell liquid injection device and a cell production line. Background Technology

[0004] Cell electrolyte injection is an important process in the production of battery cells. In related technologies, due to the insufficient design of the limiting function of the injection hole of the cell to be injected in the cell, the position of the injection hole of the cell to be injected relative to the injection needle is prone to change during the injection process. The injection hole of the cell to be injected is offset relative to the injection needle, which causes the injection needle to puncture the non-injection hole of the cell to be injected. Summary of the Invention

[0005] The battery cell liquid injection equipment and battery cell production line disclosed herein can reduce the possibility that the position of the liquid injection hole of the battery cell to be injected changes relative to the liquid injection needle, causing the liquid injection hole of the battery cell to be injected to shift relative to the liquid injection needle, thereby reducing the risk of the liquid injection needle puncturing the non-liquid injection hole of the battery cell to be injected.

[0006] In a first aspect, this disclosure provides a battery cell liquid injection device, which includes a support tray, a base, and an injection assembly. The support tray supports the battery cell to be injected with liquid and is placed on the base. A support bracket is connected to the base, and the support bracket includes a base plate that moves vertically. The injection assembly is disposed on the base plate and includes an injection needle. The base plate drives the injection needle to move along a position close to the injection hole of the battery cell to be injected with liquid for injecting liquid into the battery cell. A first limiting component is disposed on the support tray, a second limiting component is disposed on the injection assembly, and a third limiting component is disposed between the support tray and the base. The first limiting component, the second limiting component, and the third limiting component are used to limit the position of the injection hole of the battery cell to be injected with liquid relative to the injection needle.

[0007] The battery cell liquid injection device disclosed herein firstly restricts the position of the battery cell to be injected on the carrier tray by setting a first limiting component on the carrier tray, thereby achieving a first layer of limiting on the liquid injection hole of the battery cell to be injected; then, since the liquid injection component is used to inject liquid into the battery cell to be injected, a second limiting component on the liquid injection component restricts the position of the liquid injection component and the liquid injection hole of the battery cell to be injected, thereby achieving a second layer of limiting on the liquid injection hole of the battery cell to be injected; furthermore, since the carrier tray is placed on the base, a third limiting component between the carrier tray and the base restricts the position between the carrier tray and the base, thereby achieving a third layer of limiting on the liquid injection hole of the battery cell to be injected. The position of the liquid injection hole of the battery cell to be injected relative to the liquid injection needle is limited by the triple limiting. Compared to related technologies, which suffer from deficiencies in the limiting function design of the injection hole of the battery cell to be injected, leading to the easy displacement of the injection hole relative to the injection needle during the injection process, and the easy puncture of the non-injection hole of the battery cell by the injection needle, this disclosure uses triple limiting to limit the position of the injection hole of the battery cell to be injected relative to the injection needle. This improves the positional 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 injection hole of the battery cell to be injected shifting relative to the injection needle due to changes in its position, thereby reducing the risk of the injection needle puncturing the non-injection hole of the battery cell to be injected.

[0008] In one possible implementation provided in this disclosure, the carrier tray includes a carrier cavity for supporting the battery cell to be injected with liquid, and a first limiting component is disposed in the carrier cavity to limit the position of the injection hole of the battery cell to be injected with liquid relative to the carrier cavity.

[0009] The battery cell liquid injection device disclosed herein improves the aesthetics of the device by placing the first limiting component inside the bearing cavity, thus preventing the first limiting component from being exposed.

[0010] In one possible implementation provided in this disclosure, the first limiting component includes an intracavity limiting member, which is fixed to the carrier cavity. When the battery cell to be injected is located in the carrier cavity, the intracavity limiting member is used to abut against the surface of the battery cell to be injected in the horizontal direction.

[0011] The battery cell liquid injection device disclosed herein reduces the possibility of the intracavity limiting member moving within the carrier cavity by fixing the intracavity limiting member to the carrier cavity. When the battery cell to be injected is located within the carrier cavity, the intracavity limiting member abuts against the horizontal surface of the battery cell to be injected, thereby limiting the position of the injection hole of the battery cell to be injected relative to the injection needle in the horizontal direction within the carrier cavity, thus reducing the possibility of the injection hole of the battery cell to be injected shifting relative to the injection needle.

[0012] In one possible implementation provided in this disclosure, there are multiple intracavity limiting members, which are distributed along the horizontal direction and form a first limiting gap between them. When the battery cell to be injected is located in the first limiting gap, the multiple intracavity limiting members are used to abut against the surface of the battery cell to be injected along the horizontal direction.

[0013] The battery cell liquid injection device disclosed herein, by setting multiple cavity limiting members, and when the battery cell to be injected is located in the first limiting gap, the multiple cavity limiting members are used to abut against the horizontal surface of the battery cell to be injected, so as to further limit the position of the liquid injection hole of the battery cell to be injected in the horizontal direction relative to the liquid injection needle in the bearing cavity, thereby further reducing the possibility of the liquid injection hole of the battery cell to be injected being offset relative to the liquid injection needle.

[0014] In one possible implementation provided in this disclosure, there are two intracavity limiting members along the horizontal direction. The abutment position of one intracavity limiting member against the horizontal surface of the cell to be injected with liquid is at an angle of less than 180 degrees from the abutment position of the other intracavity limiting member against the horizontal surface of the cell to be injected with liquid. The first limiting assembly also includes a connector, which is disposed on the side of the two intracavity limiting members that are close to each other.

[0015] The battery cell liquid injection device disclosed herein uses only two intracavity limiting members. The angle between the position of one intracavity limiting member abutting the horizontal surface of the battery cell to be injected and the position of the other intracavity limiting member abutting the horizontal surface of the battery cell to be injected is less than 180 degrees. At the same time, the connecting member is set on the side close to each other between the two intracavity limiting members, similar to a V-clamp, to clamp the horizontal surface of the battery cell to be injected. The battery cell to be injected can be limited in the horizontal direction relative to the injection needle in the bearing cavity by the V-shaped structure alone. It has the technical effect of simple structure and easy implementation.

[0016] In one possible implementation provided in this disclosure, the cell to be injected with liquid is a cylindrical cell, and the surface of the cavity limiting member that abuts against the cylindrical cell in the horizontal direction is an arc surface, which is adapted to the arc surface of the cylindrical cell in the horizontal direction.

[0017] The battery cell liquid injection device disclosed herein improves the reliability of the intracavity limiting member abutting against the horizontal surface of the battery cell to be injected by setting the surface of the intracavity limiting member to an arc surface, so that the arc surface is used to fit against the arc surface of the cylindrical battery cell in the horizontal direction, and the intracavity limiting member and the horizontal surface of the cylindrical battery cell are in surface contact.

[0018] In one possible implementation provided in this disclosure, the second limiting component includes a connecting plate and a horizontal limiting member. The connecting plate is connected to the liquid injection component. A first through hole is provided on the connecting plate for the liquid injection needle to pass through. The horizontal limiting member is disposed on the side of the connecting plate facing the carrying tray. When the substrate drives the liquid injection needle to approach the cell to be injected, the horizontal limiting member is used to abut against the horizontal surface of the cell to be injected.

[0019] The battery cell liquid injection device disclosed herein connects a connecting plate to a liquid injection assembly. The connecting plate has a first through hole for the liquid injection needle to pass through, establishing a positional connection between the connecting plate and the liquid injection needle. Based on this, a horizontal limiting member is disposed on the side of the connecting plate facing the support tray, establishing a positional relationship between the liquid injection needle and the horizontal limiting member. When 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, the horizontal limiting member abuts against the horizontal surface of the battery cell to be injected, restricting the position of the liquid injection hole of the battery cell to be injected relative to the liquid injection needle in the horizontal direction, thereby reducing the possibility of the liquid injection hole of the battery cell to be injected deviating relative to the liquid injection needle.

[0020] In one possible implementation provided in this disclosure, there are multiple horizontal side limiting members, which are distributed along the horizontal direction on the connecting plate. The multiple horizontal side limiting members form a second limiting gap. When the battery cell to be injected is located in the second limiting gap, the multiple horizontal side limiting members are used to abut against the surface of the battery cell to be injected along the horizontal direction.

[0021] The battery cell liquid injection device disclosed herein, by setting multiple horizontal side limiting members, and when the battery cell to be injected is located within the second limiting gap, the multiple horizontal side limiting members are used to abut against the horizontal surface of the battery cell to be injected, so as to further limit the position of the liquid injection hole of the battery cell to be injected relative to the liquid injection needle in the horizontal direction, thereby further reducing the possibility of the liquid injection hole of the battery cell to be injected being offset relative to the liquid injection needle.

[0022] In one possible implementation provided in this disclosure, a guide ramp is provided on the side of the horizontal side limiting member near the carrying tray, and the guide ramp is inclined toward the second limiting gap.

[0023] The battery cell liquid injection device disclosed herein has a guide slope inclined toward the second limiting gap on the side of the horizontal side limiting member near the bearing tray, so as to facilitate the smooth entry of the battery cell to be injected into the second limiting gap.

[0024] In one possible implementation provided in this disclosure, the battery cell to be injected with liquid is a cylindrical battery cell, and the surface of the horizontal side limiting member that abuts against the cylindrical battery cell in the horizontal direction is an arc surface, which is adapted to the arc surface of the cylindrical battery cell in the horizontal direction.

[0025] The battery cell liquid injection device disclosed herein improves the reliability of the horizontal side limiting member abutting against the horizontal surface of the cylindrical battery cell by setting the surface of the horizontal side limiting member that abuts against the horizontal surface of the cylindrical battery cell as an arc surface, so that the arc surface is adapted to match the arc surface of the cylindrical battery cell in the horizontal direction, and the horizontal side limiting member and the horizontal surface of the cylindrical battery cell are in surface contact.

[0026] In one possible implementation provided in this disclosure, there are two horizontal side limiting members, which are distributed on the connecting plate at a 180-degree interval along the horizontal direction.

[0027] The battery cell liquid injection device disclosed herein can limit the liquid injection hole of the battery cell to be injected relative to the liquid injection needle along the radial direction of the battery cell by setting only two horizontal side limiting members and distributing the two horizontal side limiting members at a 180-degree interval along the horizontal direction on the connecting plate. It has the technical effects of simple structure and easy implementation.

[0028] In one possible implementation provided in this disclosure, the second limiting component further includes a hole limiting member, which is disposed on the side of the connecting plate facing the carrying tray. When the substrate drives the injection needle to move along the direction of the injection hole close to the cell to be injected, the hole limiting member is used to abut against the vertical surface of the cell to be injected.

[0029] The battery cell liquid injection device disclosed herein provides a hole position limiting member on the side of the connecting plate facing the support tray. When the substrate drives the injection needle to move along the direction of the injection hole near the battery cell to be injected, the hole position limiting member is used to abut against the vertical surface of the battery cell to be injected, thereby limiting 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.

[0030] In one possible implementation provided in this disclosure, a second through hole is provided on the hole position limiting member, the axis of the second through hole is collinear with the axis of the first through hole, the second through hole is used to allow the injection needle to pass through, and the hole position limiting member is used to abut against the rubber nail of the battery cell to be injected in the vertical direction.

[0031] The battery cell liquid injection device disclosed herein uses a second through hole in a hole limiting member to allow the injection needle to pass through. The hole limiting member abuts against the rubber nail of the battery cell to be injected in the vertical direction, so that the injection needle can accurately puncture the rubber nail of the battery cell to be injected, thereby completing the liquid injection.

[0032] In one possible implementation provided in this disclosure, the liquid injection assembly further includes a mounting plate and a liquid injection cup. The mounting plate is connected to the substrate, the liquid injection cup is mounted on the substrate, and a liquid injection needle is connected to the liquid injection cup. The mounting plate is elastically connected to the connecting plate.

[0033] The battery cell liquid injection device disclosed herein allows for an elastic connection between the mounting plate and the connecting plate. After liquid injection is completed, when the injection needle leaves the rubber nail of the battery cell to be injected, the hole limiting component can also press down on the rubber nail, reducing the possibility of the rubber nail falling off.

[0034] In one possible implementation provided in this disclosure, the third limiting component includes a limiting groove provided on the base and a limiting protrusion provided on the carrier tray. When the carrier tray is placed on the base, the limiting protrusion and the limiting groove are adapted to limit the position of the carrier tray relative to the base.

[0035] The battery cell liquid injection device disclosed herein, by setting a limiting groove on the base and setting the direction of a limiting protrusion on the carrier tray, so that the limiting protrusion and the limiting groove are adapted to each other, can limit the position of the carrier tray relative to the base, and has the technical effects of simple structure and easy implementation.

[0036] In one possible implementation provided in this disclosure, the third limiting component further includes an adhesive member disposed on at least one of the limiting groove and the limiting protrusion, wherein the carrier tray and the base are bonded together by the adhesive member.

[0037] The battery cell liquid injection device disclosed herein improves the reliability of the limiting between the carrier tray and the base by providing an adhesive on at least one of the limiting groove and the limiting protrusion, and the carrier tray and the base are bonded together by the adhesive.

[0038] In one possible implementation provided in this disclosure, the liquid injection assembly further 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 disposed between the liquid injection cup and the liquid injection needle to control the on / off state of the liquid injection cup and the liquid injection needle. The liquid injection cup has a third through hole, and the sealing member is used to seal the third through hole.

[0039] The battery cell liquid injection device disclosed herein connects a vacuum pump and a liquid supply pipe to the liquid injection cup, respectively. An on / off valve is installed between the liquid injection cup and the liquid injection needle to control the on / off state of the liquid injection cup and the liquid injection needle. At the same time, the liquid injection cup has a third through hole, and a sealing component is used to seal the third through hole. The device performs alternating positive and negative pressure cycles to complete the liquid injection, thereby improving the liquid injection efficiency.

[0040] In one possible implementation provided in this disclosure, the liquid injection assembly further includes a sealing cylinder, which is disposed on the substrate and connected to the sealing member to drive the sealing member to move on the substrate.

[0041] The battery cell liquid injection device disclosed herein can drive the sealing component to move on the substrate using only a sealing cylinder, which has the advantages of simple structure and easy implementation.

[0042] In a second aspect, this disclosure provides a battery cell production line, which includes a conveyor line, a handling mechanism, and a battery cell liquid injection device provided in any of the first aspects. The conveyor line is used to convey battery cells to be injected with liquid, and the handling mechanism is used to handle the battery cells to be injected with liquid on the conveyor line to the carrying tray of the battery cell liquid injection device.

[0043] The battery cell production line provided in this disclosure, since it includes the battery cell liquid injection equipment provided in any of the first aspects, has the same technical effect, namely, it can reduce the possibility that the position of the liquid injection hole of the battery cell to be injected changes relative to the liquid injection needle, causing the liquid injection hole of the battery cell to be injected to shift relative to the liquid injection needle, thereby reducing the risk of the liquid injection needle puncturing the non-liquid injection hole of the battery cell to be injected. Attached Figure Description

[0044] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0045] Figure 1 is a schematic diagram of the battery cell production line provided in an embodiment of this disclosure;

[0046] Figure 2 is a left view of a first three-dimensional structure of the cell liquid injection device provided in an embodiment of this disclosure;

[0047] Figure 3 shows a second three-dimensional structure of the cell liquid injection device provided in an embodiment of this disclosure;

[0048] Figure 4 is a front view of a second three-dimensional structure of the cell liquid injection device provided in an embodiment of this disclosure;

[0049] Figure 5 is a top view of a second three-dimensional structure of the cell liquid injection device provided in an embodiment of this disclosure;

[0050] Figure 6 is a left view of a second three-dimensional structure of the cell liquid injection device provided in an embodiment of this disclosure;

[0051] Figure 7 is a schematic diagram of the structure of the battery cell liquid injection device provided in this embodiment, in which three intracavity limiting members are distributed in the bearing cavity and abut against the surface of the battery cell to be injected along the horizontal direction;

[0052] Figure 8 is a schematic diagram of the structure of the battery cell liquid injection device provided in this embodiment, in which two intracavity limiting members are distributed in the bearing cavity and are used to abut against the surface of the battery cell to be injected in the horizontal direction.

[0053] Figure 9 is a schematic diagram of the structure of the battery cell liquid injection device of the present disclosure, in which two cavity limiting members are distributed in the bearing cavity, and one of the cavity limiting members is used to abut against the surface of the battery cell to be injected along the horizontal direction, which is an arc surface.

[0054] Figure 10 is a three-dimensional structural diagram of the battery cell liquid injection device provided in this embodiment of the present disclosure, in which two horizontal side limiting members are distributed on the transition plate and used to abut against the horizontal surface of the battery cell to be injected, and a hole limiting member is connected to the transition plate and used to abut against the vertical surface of the battery cell to be injected.

[0055] Figure 11 is a three-dimensional structural diagram of the battery cell liquid injection device provided in this embodiment of the present disclosure, in which two horizontal side limiting members are distributed on the transition plate and the hole limiting member is connected to the transition plate;

[0056] Figure 12 is a bottom view of the battery cell liquid injection device provided in this embodiment of the present disclosure, in which two horizontal side limiting members are distributed on the transition plate and the hole limiting member is connected to the transition plate;

[0057] Figure 13 is a left view of the battery cell liquid injection device provided in this embodiment, in which two horizontal side limiting members are distributed on the transition plate and the hole limiting member is connected to the transition plate;

[0058] Figure 14 is a bottom view of an annular horizontal side limiting member in the liquid injection battery cell device provided in the embodiment of this disclosure, with the hole limiting member connected to the transition plate;

[0059] Figure 15 is a three-dimensional structural diagram of the sealing component in the cell liquid injection device provided in the embodiments of this disclosure.

[0060] Explanation of reference numerals in the attached drawings: 1-Carrying tray; 11-Carrying cavity; 2-Base; 3-Injection assembly; 31-Injection needle; 32-Mounting plate; 33-Injection cup; 331-Third through hole; 34-On / off valve; 35-Sealing component; 351-Mounting part; 36-Sealing cylinder; 4-First limiting assembly; 41-Intracavity limiting component; 5-Second limiting assembly; 51-Connecting plate; 52-Horizontal side limiting component; 521-Guide slope; 53-Transition plate; 531-First threaded hole; 54-Hole limiting component; 541-Second through hole; 6-Battery cell to be injected; 61-Glue nail; 7-Bracket; 71-Base plate; 711-Slider; 72-Sliding guide rail; 8-Conveyor line; 9-Transporting mechanism. Detailed Implementation

[0061] The embodiments of the technical solutions disclosed herein will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solutions disclosed herein and are therefore intended to limit the scope of protection of this disclosure.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0063] In the description of the embodiments of this disclosure, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise explicitly defined.

[0064] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0065] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0066] In the description of the embodiments of this disclosure, the technical terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated, or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this disclosure.

[0067] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0068] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0069] The following is a detailed description of this disclosure.

[0070] Batteries are being used more and more widely in daily life and industry. They are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in aerospace and other fields.

[0071] Referring to Figure 1, in this embodiment of the present disclosure, the unprocessed battery is referred to as a cell. In the cell production line, the cell to be injected with electrolyte 6 is first produced by the cell production fixture. It should be noted that the liquid to be injected into the cell 6 is electrolyte. Then, the conveyor line 8 is used to transport the cell to be injected with electrolyte 6. When the cell to be injected with electrolyte is to be injected using the cell injection equipment, the transport mechanism 9 is used to transport the cell to be injected with electrolyte 6 located on the conveyor line 8 to the carrier tray 1 of the cell injection equipment, inject the electrolyte into the cell 6, and then let the injected cell stand through the settling fixture, etc. The cell to be injected with electrolyte 6 generally needs to be injected twice. The first injection is to fill it to near full, and after processing such as formation, the cell is then replenished with electrolyte a second time.

[0072] In this embodiment of the disclosure, the conveyor line 8 can be a belt conveyor or a chain conveyor; this embodiment of the disclosure does not limit the specific type of conveyor.

[0073] In this embodiment of the present disclosure, the transport mechanism 9 is used to transport the battery cell 6 to be injected with liquid on the conveyor line 8 to the carrier tray 1 of the battery cell injection device. Here, the transport mechanism 9 can be used to clamp the battery cell 6 to be injected with liquid for the transport robot, or the transport mechanism 9 can be used to magnetically attract the battery cell 6 to be injected with liquid for the transport robot, or the transport mechanism can be used to push and pull the battery cell 6 to be injected with liquid on the conveyor line 8 to the carrier tray 1 of the battery cell injection device. In this embodiment of the present disclosure, there are no limitations.

[0074] However, in the related technologies, 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 prone to change during the injection process. The injection hole of the battery cell to be injected is offset relative to the injection needle, causing the injection needle to puncture the non-injection hole of the battery cell to be injected. For example, the injection needle punctures the electrode of the battery cell to be injected, causing the battery cell to short circuit.

[0075] To address the problems existing in the aforementioned related technologies, and referring to Figures 2, 3, 4, 5, and 6, this disclosure provides a battery cell liquid injection device. The device includes a support tray 1, a base 2, a bracket 7, and an injection assembly 3. The support tray 1 supports the battery cell 6 to be injected and is placed on the base 2. The bracket 7 is connected to the base 2 and includes a base plate 71 that moves vertically. The injection assembly 3 is disposed on the base plate 71 and includes an injection needle 31. The base plate 71 drives the injection needle 31 to move along a direction close to the injection hole of the battery cell 6. A first limiting component 4 is provided on the support tray 1, a second limiting component 5 is provided on the injection assembly 3, and a third limiting component is provided between the support 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 relative to the injection needle 31.

[0076] In this embodiment of the present disclosure, the support tray 1 is used to support the battery cell 6 to be injected with liquid. Here, the side of the support tray 1 used to support the battery cell 6 to be injected with liquid can be a plane, and the plane is used to support the battery cell 6 to be injected with liquid. Of course, the side of the support tray 1 used to support the battery cell 6 to be injected with liquid can be concave to form a support cavity 11, and the support cavity 11 is used to support the battery cell 6 to be injected with liquid. In addition, the support tray 1 can be other structures, and this embodiment of the present disclosure does not limit them.

[0077] In this embodiment, the bracket 7 is connected to the base 2. Here, the bracket 7 and base 2 can be non-detachably connected, for example, by welding the bracket 7 to the base 2; of course, the bracket 7 and base 2 can also be detachably connected, for example, by threaded connection, etc. This embodiment does not limit the specific connection. In one possible implementation provided by this embodiment, the bracket 7 is welded to the base 2, which can save on subsequent installation costs.

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

[0079] In this embodiment, the liquid injection assembly 3 includes a liquid injection needle 31. The substrate 71 drives the liquid injection needle 31 to move along the direction close to the liquid injection hole of the battery cell 6 to be injected. Here, the substrate 71 can drive the liquid injection needle 31 to move along the direction close to the adhesive pin 61 of the battery cell 6 to be injected, piercing the adhesive pin 61 of the battery cell 6 to form the liquid injection hole of the battery cell 6. Of course, the substrate 71 can also drive the liquid injection needle 31 to move along the direction close to the liquid injection hole of the battery cell 6 to pass through the liquid injection hole of the battery cell 6 to inject liquid into the battery cell 6. This embodiment does not limit this. Based on this, when the substrate 71 drives the liquid injection needle 31 to move along the direction close to the liquid injection hole of the battery cell 6 to inject liquid into the battery cell 6, the liquid injection needle 31 must not pierce the non-liquid injection holes of the battery cell 6 to be injected, such as piercing the electrode of the battery cell 6 to be injected, which would put the battery cell 6 at risk of short circuit.

[0080] In this embodiment, the substrate 71 drives the injection needle 31 to move along the direction close to the injection hole of the battery cell 6 to be injected. Here, the movement of the injection needle 31 along the direction close to the injection hole of the battery cell 6 is a vertical movement. Of course, the support 7 can also move horizontally relative to the base 2, thereby driving the substrate 71, so that the substrate 71 drives the injection needle 31 to move horizontally along the direction close to the injection hole of the battery cell 6 to be injected. In other words, the support 7 and the substrate 71 on the support 7 can drive the injection needle to move in both the horizontal and vertical directions, so as to drive the injection needle 31 close to the injection hole of the battery cell 6 to be injected. Based on this, the battery cell injection device can inject only one battery cell 6 to be injected, or the battery cell injection device can inject multiple battery cells 6 to be injected, for example, a row of battery cells 6 to be injected horizontally, or multiple rows of battery cells 6 to be injected horizontally. This embodiment does not limit this.

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

[0082] In this embodiment, a first limiting component 4 is provided on the support tray 1, a second limiting component 5 is provided on the liquid injection component 3, and a third limiting component is provided between the support 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 liquid injection hole of the battery cell 6 to be injected relative to the liquid injection needle 31. Here, the position of the battery cell 6 to be injected relative to the liquid injection needle 31 includes the horizontal position of the liquid injection hole of the battery cell 6 relative to the liquid injection needle 31 and the vertical position of the battery cell 6 relative to the liquid injection needle 31. The first limiting component 4 can indirectly limit the horizontal position of the liquid injection hole of the battery cell 6 to be injected relative to the liquid injection needle 31; the first limiting component 4 can also indirectly limit the horizontal position of the liquid injection hole of the battery cell 6 to be injected relative to the liquid injection needle 31; the first limiting component 4 can also simultaneously and indirectly limit the position of the liquid injection hole of the battery cell 6 to be injected relative to the liquid injection needle 31. 1. The position in the vertical direction and the position in the horizontal direction; similarly, the second limiting component 5 can directly limit the position of the injection hole of the battery cell 6 to be injected with liquid in the horizontal direction relative to the injection needle 31; the second limiting component 5 can directly limit the position of the injection hole of the battery cell 6 to be injected with liquid in the vertical direction relative to the injection needle 31; the second limiting component 5 can also directly limit the position of the injection hole of the battery cell 6 to be injected with liquid in the vertical direction and the position in the horizontal direction relative to the injection needle 31 at the same time; in addition, the third limiting component can indirectly limit the position of the injection hole of the battery cell 6 to be injected with liquid in the vertical direction relative to the injection needle 31, and the third limiting component can also indirectly limit the position of the injection hole of the battery cell 6 to be injected with liquid in the horizontal direction relative to the injection needle 31 at the same time. In this respect, the embodiments disclosed herein do not impose any limitations.

[0083] The battery cell injection device provided in this embodiment firstly restricts the position of the injection hole of the battery cell 6 on the carrier tray 1 by providing a first limiting component 4 on the carrier tray 1, thus achieving a first layer of limiting on the injection hole of the battery cell 6. Secondly, since the injection component 3 is used to inject liquid into the battery cell 6, a second limiting component 5 is provided on the injection component 3 to restrict the position of the injection component 3 relative to the injection hole of the battery cell 6, thus achieving a second layer of limiting on the injection hole of the battery cell 6. Thirdly, since the carrier tray 1 is placed on the base 2, a third limiting component is provided between the carrier tray 1 and the base 2 to restrict the position between the carrier tray 1 and the base 2, thus achieving a third layer of limiting on the injection hole of the battery cell 6. The position of the injection hole of the battery cell 6 relative to the injection needle 31 is restricted by these three layers of limiting. Compared to related technologies, which suffer from deficiencies in the limiting function design of the injection hole of the battery cell 6 to be injected, leading to the easy displacement of the injection hole relative to the injection needle 31 during the injection process, and the easy puncture of the non-injection hole of the battery cell 6 by the injection needle 31, this disclosure uses triple limiting to limit the position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31. This improves the positional 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 of the injection hole of the battery cell 6 to be injected shifting relative to the injection needle 31 due to changes in its position, thereby reducing the risk of the injection needle 31 puncturing the non-injection hole of the battery cell 6 to be injected.

[0084] It should be noted that the electrolyte injection device provided in this embodiment is applicable to the first electrolyte injection process of the battery cell 6 to be injected.

[0085] This disclosure provides a battery cell liquid injection device. Referring to Figures 7, 8 and 9, the carrier tray 1 includes a carrier cavity 11 for supporting the battery cell 6 to be injected with liquid. A first limiting component 4 is disposed in the carrier cavity 11 to limit the position of the liquid injection hole of the battery cell 6 relative to the carrier cavity 11.

[0086] In this embodiment of the present disclosure, the support cavity 11 is used to support the battery cell 6 to be injected with liquid. In the vertical direction, the size of the support cavity 11 can be one-fifth of the battery cell 6 to be injected with liquid, one-third of the battery cell 6 to be injected with liquid, one-half of the battery cell 6 to be injected with liquid, etc. This embodiment of the present disclosure does not limit this.

[0087] In this embodiment of the present disclosure, the supporting cavity 11 is used to support the battery cell 6 to be injected 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 injected 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 injected with liquid is also cylindrical. Of course, the inner contour of the cavity wall of the supporting cavity 11 can also be different from the outer contour of the battery cell 6 to be injected with liquid. For example, the inner contour of the supporting cavity 11 is cubic and the outer contour of the battery cell 6 to be injected with liquid is cylindrical. This embodiment of the present disclosure does not limit this.

[0088] The battery cell liquid injection device provided in this embodiment improves the aesthetics of the device by placing the first limiting component 4 inside the bearing cavity 11, thus preventing the first limiting component 4 from being exposed.

[0089] This disclosure provides a battery cell liquid injection device. Referring to Figures 5 and 6, the first limiting component 4 includes an intracavity limiting member 41, which is fixed to the bearing cavity 11. When the battery cell 6 to be injected is located in the bearing cavity 11, the intracavity limiting member 41 is used to abut against the surface of the battery cell 6 to be injected in the horizontal direction.

[0090] In this embodiment, the intracavity limiting member 41 is fixed to the bearing cavity 11. Here, the intracavity limiting member 41 and the bearing cavity 11 can be fixed in a detachable manner, such as by snap-fit ​​or by screw fixing, which facilitates the disassembly and maintenance of the intracavity limiting member 41. Of course, the intracavity limiting member 41 and the bearing cavity 11 can also be fixed in a non-detachable manner, such as by welding, which can further reduce the possibility of the intracavity limiting member 41 moving within the bearing cavity 11. This embodiment does not limit the manner in which the intracavity limiting member 41 and the bearing cavity 11 are fixed.

[0091] In this embodiment of the present disclosure, when the battery cell 6 to be injected with liquid is located in the bearing cavity 11, the cavity limiting member 41 is used to abut against the horizontal surface of the battery cell 6 to be injected with liquid. Here, the way in which the cavity limiting member 41 abuts against the horizontal surface of the battery cell 6 to be injected with liquid can be line contact; the way in which the cavity limiting member 41 abuts against the horizontal surface of the battery cell 6 to be injected with liquid can be point contact; the way in which the cavity limiting member 41 abuts against the horizontal surface of the battery cell 6 to be injected with liquid can be surface contact. This embodiment of the present disclosure does not limit this.

[0092] In this embodiment of the disclosure, the intracavity limiting member 41 can be made of an elastic material, for example, the intracavity limiting member 41 is a plate-like structure made of rubber. The intracavity limiting member 41 can also be made of a non-elastic material, such as a plate-like structure made of wood. This embodiment of the disclosure does not limit the specific materials used.

[0093] The battery cell injection device provided in this embodiment reduces the possibility of the intracavity limiting member 41 moving within the carrier cavity 11 by fixing the intracavity limiting member 41 to the carrier cavity 11. When the battery cell 6 to be injected is located within the carrier cavity 11, the intracavity limiting member 41 abuts against the horizontal surface of the battery cell 6 to be injected, restricting the position of the injection hole of the battery cell 6 relative to the injection needle 31 in the horizontal direction within the carrier cavity 11, thereby reducing the possibility of the injection hole of the battery cell 6 to be injected shifting relative to the injection needle 31.

[0094] This disclosure provides a battery cell liquid injection device. Referring to Figures 7, 8 and 9, there are multiple cavity limiting members 41, which are distributed along the horizontal direction and form a first limiting gap between them. When the battery cell 6 to be injected is located in the first limiting gap, the multiple cavity limiting members 41 are used to abut against the horizontal surface of the battery cell 6 to be injected.

[0095] In this embodiment, there may be two intracavity limiting members 41, which may be distributed in the bearing cavity 11 at a 180-degree interval in the horizontal direction; there may also be three intracavity limiting members 41, in which two adjacent intracavity limiting members 41 may be distributed in the bearing cavity 11 at a 120-degree interval in the horizontal direction, or in which two intracavity limiting members 41 may be distributed in the bearing cavity 11 at a 100-degree interval in the horizontal direction, or in which two intracavity limiting members 41 may be distributed in the bearing cavity 11 at a 260-degree interval in the horizontal direction. This embodiment does not limit the specific method of distribution.

[0096] In this embodiment of the present disclosure, the shape of the first 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 first 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 first 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 first limiting gap is a cube, and the outer contour of the battery cell 6 to be injected with liquid is a cylinder. This embodiment of the present disclosure does not limit this.

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

[0098] This disclosure provides a battery cell liquid injection device. Referring to Figures 8 and 9, there are two intracavity limiting members 41. Along the horizontal direction, the abutting position of one intracavity limiting member 41 against the horizontal surface of the battery cell 6 to be injected is at an angle of less than 180 degrees from the abutting position of the other intracavity limiting member 41 against the horizontal surface of the battery cell 6 to be injected. The first limiting component 4 also includes a connecting member, which is disposed on the side of the two intracavity limiting members 41 that are close to each other.

[0099] In this embodiment of the disclosure, along the horizontal direction, the angle between the abutment position of one cavity limiting member 41 against the horizontal surface of the battery cell 6 to be injected and the abutment position of the other cavity limiting member 41 against the horizontal surface of the battery cell 6 to be injected is less than 180 degrees, indicating that the two cavity limiting members 41 intersect.

[0100] In this embodiment, the first limiting component 4 further includes a connector, which is disposed on the side of the two intracavity limiting components 41 that are close to each other. The connector can be a rotating shaft, and rotating shaft holes are respectively provided on the side of the two intracavity limiting components 41 that are close to each other. The rotating shaft extends into the two rotating shaft holes in sequence to connect the two intracavity limiting components 41. At the same time, the two intracavity limiting components 41 can also rotate relative to each other through the rotating shaft to adjust the size of the first limiting gap. The connector can also be an adhesive, which is disposed on the side of the two intracavity limiting components 41 that are close to each other to connect the two intracavity limiting components 41.

[0101] The battery cell liquid injection device provided in this embodiment of the present disclosure, by setting only two intracavity limiting members 41, and the angle between the abutment position of one intracavity limiting member 41 against the horizontal surface of the battery cell 6 to be injected and the abutment position of the other intracavity limiting member 41 against the horizontal surface of the battery cell 6 to be injected is less than 180 degrees, and at the same time, the connecting member is set on the side close to each other between the two intracavity limiting members 41, similar to a V-clamp, to clamp the horizontal surface of the battery cell 6 to be injected. The liquid injection hole of the battery cell 6 to be injected can be limited in the horizontal direction relative to the liquid injection needle 31 in the bearing cavity 11 by only the V-shaped structure. It has the technical effect of simple structure and easy implementation.

[0102] This disclosure provides a battery cell liquid injection device. Referring to FIG9, the battery cell 6 to be injected is a cylindrical battery cell. The surface of the cavity limiting member 41 that abuts against the cylindrical battery cell in the horizontal direction is an arc surface, which is adapted to the arc surface of the cylindrical battery cell in the horizontal direction.

[0103] In this embodiment, the surface of the cavity limiting member 41 that abuts against the cylindrical battery cell in the horizontal direction is an arc surface. This arc surface is a concave arc surface, which is adapted to the convex arc surface of the cylindrical battery cell. In this context, the arc surface being adapted to the arc surface of the cylindrical battery cell in the horizontal direction 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 device provided in this embodiment improves the reliability of the intracavity limiting member 41 abutting the cylindrical battery cell along the horizontal direction by making the surface of the intracavity limiting member 41 that abuts against the cylindrical battery cell along the horizontal direction as an arc surface.

[0105] This disclosure provides a battery cell liquid injection device. Referring to Figures 3 and 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 liquid injection component 3. A first through hole is provided on the connecting plate 51 for the liquid injection needle 31 to pass through. The horizontal side limiting member 52 is disposed on the side of the connecting plate 51 facing the carrying tray 1. When the substrate 71 drives the liquid injection needle 31 to move along the direction close to the liquid injection hole of the battery cell 6 to be injected, the horizontal side limiting member 52 is used to abut against the horizontal surface of the battery cell 6 to be injected.

[0106] In this embodiment of the present disclosure, the connecting plate 51 is connected to the liquid injection assembly 3. Here, the connection between the connecting plate 51 and the liquid injection assembly 3 can be an elastic connection, for example, the connecting plate 51 and the liquid injection assembly 3 can be connected by a spring. Of course, the connection between the connecting plate 51 and the liquid injection assembly 3 can also be a rigid connection, for example, the connecting plate 51 and the liquid injection assembly 3 can be connected by a connecting column. This embodiment of the present disclosure does not limit this.

[0107] In this embodiment, the horizontal side limiting member 52 is disposed on the side of the connecting plate 51 facing the carrying tray 1. Here, the horizontal side limiting member 52 can be integrally formed with the connecting plate 51, so that no further installation is required later, saving installation costs. Of course, the horizontal side limiting member 52 can also be detachably connected to the connecting plate 51, which facilitates processing and manufacturing, enables rapid model changeover, and improves the compatibility of the cell liquid injection equipment. This embodiment does not limit this aspect. In one possible implementation provided by this embodiment, the horizontal side limiting member 52 is provided with a first threaded hole 531, and the connecting plate 51 is provided with a second threaded hole. The threaded connector extends sequentially into the first threaded hole 531 and the second threaded hole to connect the horizontal side limiting member 52 to the connecting plate 51.

[0108] Based on this, a horizontal side limiting member 52 is disposed on the side of the connecting plate 51 facing the carrying tray 1. Here, the horizontal side limiting member 52 can be directly connected to the side of the connecting plate 51 facing the carrying tray 1. Of course, the horizontal side limiting member 52 can also be indirectly connected to the side of the connecting plate 51 facing the carrying tray 1. This disclosure embodiment does not limit this. In one possible implementation provided by the disclosure embodiment, the horizontal side limiting member 52 is indirectly connected to the side of the connecting plate 51 facing the carrying tray 1. Specifically, the second limiting component 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 limiting member 52 is disposed on the side of the transition plate 53 facing the carrying 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 limiting member 52 to the connecting plate 51.

[0109] In this embodiment of the present disclosure, when the substrate 71 drives the injection needle 31 to move along 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 horizontal surface of the battery cell 6 to be injected. Here, the horizontal side limiting member 52 abuts against the horizontal surface of the battery cell 6 to be injected in a line contact manner; the horizontal side limiting member 52 abuts against the horizontal surface of the battery cell 6 to be injected in a point contact manner; the horizontal side limiting member 52 abuts against the horizontal surface of the battery cell 6 to be injected in a surface contact manner. This embodiment of the present disclosure does not limit this.

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

[0111] This disclosure provides a battery cell liquid injection device. Referring to Figures 10, 11, 12, 13, and 14, there are multiple horizontal side limiting members 52. These multiple horizontal side limiting members 52 are distributed along the horizontal direction on the connecting plate 51 and form a second limiting gap. When the battery cell 6 to be injected is located within the second limiting gap, the multiple horizontal side limiting members 52 are used to abut against the horizontal surface of the battery cell 6 to be injected.

[0112] In this embodiment, there may be two horizontal side limiting members 52, which may be distributed on the connecting plate 51 at a 180-degree interval in the horizontal direction; there may also be three horizontal side limiting members 52, in which two adjacent intracavity limiting members 41 may be distributed on the connecting plate 51 at a 120-degree interval in the horizontal direction; or two of the three horizontal side limiting members 52 may be distributed on the connecting plate 51 at a 100-degree interval in the horizontal direction, and the other two may be distributed on the connecting plate 51 at a 260-degree interval in the horizontal direction. This embodiment does not limit the scope of the invention.

[0113] In this embodiment of the present disclosure, 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. This embodiment of the present disclosure does not limit this.

[0114] The battery cell liquid injection device provided in this embodiment of the present disclosure, by setting multiple horizontal side limiting members 52, and when the battery cell 6 to be injected is located in the second limiting gap, the multiple horizontal side limiting members 52 are all used to abut against the surface of the battery cell 6 to be injected in the horizontal direction, so as to further limit the position of the liquid injection hole of the battery cell 6 to be injected in the horizontal direction relative to the liquid injection needle 31, thereby further reducing the possibility of the liquid injection hole of the battery cell 6 to be injected being offset relative to the liquid injection needle 31.

[0115] This disclosure provides a battery cell liquid injection device. Referring to Figures 11, 13 and 14, a guide slope 521 is provided on the side of the horizontal side limiting member 52 near the carrying tray 1. The guide slope 521 is inclined toward the second limiting gap.

[0116] In this embodiment, the side of the guide slope 521 facing the second limiting gap can be a smooth plane or a non-smooth plane, and this embodiment does not limit it.

[0117] The battery cell liquid injection device provided in this embodiment of the present disclosure has a guide slope 521 that is inclined toward the second limiting gap on the side of the horizontal side limiting member 52 near the bearing tray 1, so that the battery cell 6 to be injected can smoothly enter the second limiting gap.

[0118] This disclosure provides a battery cell liquid injection device. Referring to FIG11, the battery cell 6 to be injected is a cylindrical battery cell. The horizontal side limiting member 52 is used to abut against the cylindrical battery cell in the horizontal direction. The surface of the horizontal side limiting member 52 is an arc surface, which is used to adapt to the arc surface of the cylindrical battery cell in the horizontal direction.

[0119] In this embodiment of the disclosure, the horizontal side limiting member 52 is used to abut against the cylindrical battery cell in the horizontal direction. The surface of the horizontal side limiting member 52 is an arc surface. The arc surface is a concave arc surface. The concave arc surface is adapted to the convex arc surface of the cylindrical battery cell. In this case, the arc surface is adapted to the arc surface of the cylindrical battery cell in the horizontal direction. This 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 device provided in this embodiment improves the reliability of the horizontal side limiting member 52 abutting against the cylindrical battery cell in the horizontal direction by setting the surface of the horizontal side limiting member 52 that abuts against the cylindrical battery cell in the horizontal direction as an arc surface, so that the arc surface is adapted to the arc surface of the cylindrical battery cell in the horizontal direction, and the horizontal side limiting member 52 and the surface of the cylindrical battery cell in the horizontal direction are in surface contact.

[0121] This disclosure provides a battery cell liquid injection device. Referring to Figures 10 and 11, there are two horizontal side limiting members 52, which are distributed on the connecting plate 51 at a 180-degree interval along the horizontal direction.

[0122] The battery cell liquid injection device provided in this embodiment can achieve the limitation of the liquid injection hole of the battery cell 6 to be injected relative to the liquid injection needle 31 in the horizontal direction by setting only two horizontal side limiting members 52 and distributing the two horizontal side limiting members 52 at a distance of 180 degrees along the horizontal direction on the connecting plate 51. It has the technical effects of simple structure and easy implementation.

[0123] This disclosure provides a battery cell liquid injection device. The second limiting component 5 further includes a hole limiting member 54. The hole limiting member 54 is disposed on the side of the connecting plate 51 facing the carrying tray 1. When the substrate 71 drives the injection needle 31 to move along the direction close to the injection hole of the battery cell 6 to be injected, the hole limiting member 54 is used to abut against the vertical surface of the battery cell 6 to be injected.

[0124] In this embodiment, the hole positioning member 54 is disposed on the side of the connecting plate 51 facing the carrying tray 1. Here, the hole positioning member 54 can be integrally formed with the connecting plate 51, thus eliminating the need for subsequent installation and saving installation costs. Alternatively, the hole positioning member 54 can be detachably connected to the connecting plate 51, which facilitates processing and manufacturing, enables rapid model changeover, and improves the compatibility of the battery cell liquid injection equipment. This embodiment does not limit the scope of this embodiment. In one possible implementation provided by this embodiment, the hole positioning member 54 is provided with a third threaded hole, and the connecting plate 51 is provided with a fourth threaded hole. A threaded connector extends sequentially into the third threaded hole and the fourth threaded hole to connect the hole positioning member 54 to the connecting plate 51.

[0125] Based on this, the hole positioning limiter 54 is disposed on the side of the connecting plate 51 facing the carrying tray 1. Of course, the hole positioning limiter 54 can be directly connected to the side of the connecting plate 51 facing the carrying tray 1, or it can be indirectly connected to the side of the connecting plate 51 facing the carrying tray 1. This embodiment of the present disclosure does not impose any limitations on this. In one possible implementation provided by this embodiment, the hole positioning limiter 54 is also disposed on the transition plate 53 on which the horizontal side limiter 52 is disposed.

[0126] In this embodiment of the present disclosure, when the substrate 71 drives the injection needle 31 to move along the direction close to the injection hole of the battery cell 6 to be injected, the hole position limiting member 54 is used to abut against the vertical surface of the battery cell 6 to be injected. Here, the hole position limiting member 54 abuts against the vertical surface of the battery cell 6 to be injected in a line contact manner; the hole position limiting member 54 abuts against the vertical surface of the battery cell 6 to be injected in a point contact manner; the hole position limiting member 54 abuts against the vertical surface of the battery cell 6 to be injected in a surface contact manner. This embodiment of the present disclosure does not limit this.

[0127] The battery cell liquid injection device provided in this embodiment provides a hole position limiting member 54 on the side of the connecting plate 51 facing the support 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 hole position limiting member 54 is used to abut against the vertical surface of the battery cell 6 to be injected, so as to limit the position of the injection hole of the battery cell 6 to be injected relative to the injection needle 31 in the vertical 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.

[0128] This disclosure provides a battery cell liquid injection device. Referring to Figures 11 and 15, a second through hole 541 is provided on the hole limiting member 54. The axis of the second through hole 541 is collinear with the axis of the first through hole. The second through hole 541 is used to allow the injection needle 31 to pass through. The hole limiting member 54 is used to abut against the rubber nail 61 of the battery cell 6 to be injected in the vertical direction.

[0129] The battery cell liquid injection device provided in this embodiment of the present disclosure has a second through hole 541 on the hole limiting member 54, through which the liquid injection needle 31 passes. The hole limiting member 54 is used to abut against the rubber nail 61 of the battery cell 6 to be injected in the vertical direction, so that the liquid injection needle 31 can accurately puncture the rubber nail 61 of the battery cell 6 to be injected, thereby completing the liquid injection.

[0130] This disclosure provides a battery cell liquid injection device. Referring to Figures 2, 3, 4, 5 and 6, the liquid injection assembly 3 further includes a mounting plate 32 and an injection cup 33. The mounting plate 32 is connected to the substrate 71, the injection cup 33 is mounted on the substrate 71, and an injection needle 31 is connected to the injection cup 33. The mounting plate 32 is elastically connected to the connecting plate 51.

[0131] In this embodiment of the present disclosure, an injection needle 31 is connected to the injection cup 33. Here, the injection cup 33 and the injection needle 31 can be non-detachable, such as by welding; of course, the injection cup 33 and the injection needle 31 can also be detachable, such as by threaded connection, which facilitates later replacement and maintenance.

[0132] In this embodiment, the mounting plate 32 and the connecting plate 51 are elastically connected. 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. This embodiment does not limit the connection.

[0133] The battery cell liquid injection device provided in this embodiment of the present disclosure, by elastically connecting the mounting plate 32 and the connecting plate 51, after the liquid injection is completed, when the injection needle 31 leaves the adhesive pin 61 of the battery cell 6 to be injected, the hole position limiting member 54 can also press down the adhesive pin 61, reducing the possibility of the adhesive pin 61 falling off. Specifically, when the substrate 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 limiting member 52 is used to abut against the horizontal surface of the battery cell 6 to be injected, and the hole position limiting member 54 is used to abut against the vertical surface 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 to inject liquid into the battery cell 6 to be injected. When the substrate 71 drives the injection needle 31 to move 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, which was previously compressed, needs to return to its original state when the mounting plate 32 leaves, and then move synchronously with the mounting plate 32, so that the hole limiting member 54 leaves after the injection needle 31.

[0134] This disclosure provides a battery cell liquid injection device. Referring to Figures 2, 3, 4, 5 and 6, the third limiting component includes a limiting groove provided on the base 2 and a limiting protrusion provided on the carrier tray 1. When the carrier tray 1 is placed on the base 2, the limiting protrusion and the limiting groove are adapted to limit the position of the carrier tray 1 relative to the base 2.

[0135] The battery cell liquid injection device provided in this embodiment of the present disclosure, by setting a limiting groove on the base 2 and setting a limiting protrusion on the carrier tray 1, makes the limiting protrusion and the limiting groove fit together, thereby limiting the position of the carrier tray 1 relative to the base 2. It has the technical effects of simple structure and easy implementation.

[0136] This disclosure provides a battery cell liquid injection device. The third limiting component further includes an adhesive component, which is disposed on at least one limiting groove and a limiting protrusion. The carrier tray 1 and the base 2 are bonded together by the adhesive component.

[0137] The battery cell liquid injection device provided in this embodiment improves the reliability of the limiting between the carrier tray 1 and the base 2 by providing an adhesive on at least one of the limiting groove and the limiting protrusion.

[0138] In one possible implementation method provided in this embodiment, the carrier tray 1 is first placed on the base 2, such that the limiting protrusion on the carrier tray 1 matches the limiting groove on the base 2. Simultaneously, an adhesive member located on at least one of the limiting groove and the limiting protrusion bonds the carrier tray 1 to the base 2, achieving the limiting of the carrier tray 1 and the base 2. Next, the battery cell 6 to be injected is placed in the carrier cavity 11 of the carrier tray 1. At this time, the cavity limiting member 41 located in the carrier cavity 11 abuts against the horizontal surface of the battery cell 6 to be injected, achieving the limiting of the injection hole of the battery cell 6 relative to the carrier cavity 11 in the horizontal direction. Then, the substrate 71 drives the injection needle 31 of the injection assembly 3 to move vertically... During the downward movement, the horizontal side limiting member 52 is used to abut against the horizontal surface of the cell 6 to be injected with liquid, and the hole limiting member 54 is used to abut against the vertical adhesive nail 61 of the cell 6 to be injected with liquid. The injection needle 31 passes through the first through hole and the second through hole 541 in sequence, puncturing the adhesive nail 61 to inject liquid into the cell 6 to ensure that the injection needle 31 accurately penetrates the injection hole to avoid the risk of short circuit due to puncturing the electrode, and at the same time, it can avoid the situation where the injection needle 31 is misaligned. After the liquid injection is completed, while the injection needle 31 is withdrawn from the second through hole 541, the hole limiting member 54 is still used to abut against the vertical adhesive nail 61 of the cell 6 to be injected with liquid, reducing the risk of the adhesive nail 61 falling off.

[0139] This disclosure provides a battery cell liquid injection device. Referring to Figures 3, 4, 5, 6 and 15, the liquid injection assembly 3 further includes a vacuum pump, a liquid supply pipe, an on / off valve 34 and a sealing member 35 that moves along the substrate 71. The vacuum pump and the liquid supply pipe are respectively connected to the liquid injection cup 33. The on / off valve 34 is disposed 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. The liquid injection cup 33 has a third through hole 331, and the sealing member 35 is used to block the third through hole 331.

[0140] In this embodiment of the disclosure, the liquid injection assembly 3 includes a sealing member 35 that moves along the substrate 71. Here, the sealing member 35 can be driven by a cylinder or by an electric drive. This embodiment of the disclosure does not limit the driving method.

[0141] In this embodiment, the on / off valve 34 is disposed between the injection cup 33 and the injection needle 31. Here, the on / off valve 34 can be disposed on the injection cup 33, or it can be disposed on the injection needle 31; this embodiment does not limit the specific placement of the valve. In one possible implementation provided by this embodiment, the on / off valve 34 is disposed on the injection cup 33.

[0142] Taking the on / off valve 34 mounted on the injection cup 33 as an example, the on / off valve 34 can be non-removably mounted on the injection cup 33, for example, by welding; of course, the on / off valve 34 can also be detachably mounted on the injection cup 33, for example, by screwing. This disclosure does not limit this aspect. In one possible implementation provided by this disclosure, the on / off valve 34 is detachably mounted on the injection cup 33 to facilitate future replacement and maintenance.

[0143] In this embodiment of the disclosure, the sealing member 35 is used to block the third through hole 331. Here, the sealing member 35 and the third through hole 331 are interference fit. In addition, for ease of installation and sealing effect, the part of the sealing member 35 that contacts the hole wall of the third through hole 331 is made of an elastic material, such as rubber.

[0144] In this embodiment of the present disclosure, the sealing member 35 is provided with an installation part 351, which is used by the installation tool, for example, the installation part 351 is clamped by the installation tool.

[0145] The battery cell liquid injection device provided in this embodiment connects a vacuum pump and a liquid supply pipe to a liquid injection cup 33, respectively. An on / off valve 34 is installed between the liquid injection cup 33 and the liquid injection needle 31 to control the on / off state of the liquid injection cup 33 and the liquid injection needle 31. At the same time, the liquid injection cup 33 has a third through hole 331, and a sealing member 35 is used to seal the third through hole 331. The positive and negative pressure alternates to complete the liquid injection, thereby improving the liquid injection efficiency. Specifically, when the substrate 71 drives the injection needle 31 to move along the direction close to the injection hole of the battery cell 6 to be injected, the cavity limiting member 41 is used to abut against the horizontal surface of the battery cell 6 to be injected, the horizontal side limiting member 52 is used to abut against the horizontal surface of the battery cell 6 to be injected, and the hole limiting member 54 is used to abut against the vertical surface of the battery cell 6 to be injected. When the injection needle 31 passes through the first through hole and the second through hole 541 in sequence, piercing the rubber nail 61 of the battery cell 6 to be injected and entering the interior of the battery cell 6 to be injected, the sealing member 35 moves along the direction close to the injection cup 33 to seal the third through hole 331 and achieve a seal. At this time, the on / off valve 34 is opened, and the vacuum pump evacuates the battery cell 6 to be injected. After the evacuation is completed, When the on / off valve 34 is closed, a negative pressure environment is formed inside the battery cell 6 to be injected with electrolyte. At this time, the vacuum hole of the injection cup 33 is reduced to normal pressure, and the sealing member 35 moves vertically away from the injection cup 33. Then, the liquid is supplied to the injection cup 33 through the liquid supply pipe. When the liquid preparation is completed, the sealing member 35 moves vertically and closer to the injection cup 33 to seal the third through hole 331 again. The on / off valve 34 is opened. Since the battery cell 6 to be injected with electrolyte is under negative pressure, the electrolyte in the injection cup 33 will be drawn into the battery cell 6 to be injected with electrolyte. Since there will be residual electrolyte in the injection cup 33, the vacuum pump is used to provide 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 with electrolyte.

[0146] This disclosure provides a battery cell liquid injection device. Referring to Figures 3, 4, 5 and 6, the liquid injection assembly 3 further includes a sealing cylinder 36. The sealing cylinder 36 is disposed on the substrate 71 and is connected to the sealing member 35 to drive the sealing member 35 to move on the substrate 71.

[0147] The battery cell liquid injection device provided in this embodiment can drive the sealing component 35 to move on the substrate 71 using only the sealing cylinder 36, which has the technical effect of simple structure and easy implementation.

[0148] This disclosure provides a battery cell liquid injection device. Referring to Figures 3, 4, 5 and 6, a sliding guide rail 72 that moves in the 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 this embodiment of the present disclosure, a slider 711 may also be provided on the base 2, and a sliding guide rail 72 that moves in 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 liquid injection device provided in this embodiment reduces the contact area between the substrate 71 and the base 2 by making the slider 711 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 them.

[0151] The above embodiments are merely illustrative of the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure, and all should be covered within the scope of this disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way.

Claims

1. A battery cell electrolyte injection device, comprising: Support tray, used to support battery cells to be injected with electrolyte; The base on which the support tray is placed; A support frame connected to the base, the support frame including a base plate that moves in a vertical direction; The liquid injection assembly is disposed on the substrate and includes a liquid injection needle. The substrate drives the liquid injection needle to move along the direction close to the liquid injection hole of the battery cell to be injected. The carrier tray is provided with a first limiting component, the liquid injection component is provided with a second limiting component, and a third limiting component is provided between the carrier tray and the base. The first limiting component, the second limiting component, and the third limiting component are used to limit the position of the liquid injection hole of the cell to be injected relative to the liquid injection needle.

2. The cell electrolyte injection device according to claim 1, wherein, The support tray includes a support cavity for supporting the battery cell to be injected with liquid. The first limiting component is disposed in the support cavity to limit the position of the injection hole of the battery cell to be injected with liquid relative to the support cavity.

3. The cell electrolyte injection device according to claim 2, wherein, The first limiting component includes an intracavity limiting member, which is fixed to the bearing cavity. When the cell to be injected with liquid is located in the bearing cavity, the intracavity limiting member is used to abut against the surface of the cell to be injected with liquid in the horizontal direction.

4. The cell electrolyte injection device according to claim 3, wherein, The cavity limiting member is a plurality of such members, which are distributed along the horizontal direction and form a first limiting gap between them. When the battery cell to be injected is located in the first limiting gap, the plurality of cavity limiting members are used to abut against the surface of the battery cell to be injected along the horizontal direction.

5. The cell electrolyte injection device according to claim 4, wherein, There are two intracavity limiting members. Along the horizontal direction, the abutting position of one intracavity limiting member against the surface of the cell to be injected along the horizontal direction is at an angle of less than 180 degrees from the abutting position of the other intracavity limiting member against the surface of the cell to be injected along the horizontal direction. The first limiting assembly also includes a connector, which is disposed on the side of the two intracavity limiting members that are close to each other.

6. The cell electrolyte injection device according to any one of claims 3 to 5, wherein, The cell to be injected with liquid is a cylindrical cell, and the surface of the cavity limiting member that abuts against the cylindrical cell along the horizontal direction is an arc surface, which is adapted to the arc surface of the cylindrical cell along the horizontal direction.

7. The cell electrolyte injection device according to any one of claims 1 to 6, wherein, The second limiting component includes a connecting plate and a horizontal limiting member. The connecting plate is connected to the liquid injection component. The connecting plate has a first through hole for the liquid injection needle to pass through. The horizontal limiting member is disposed on the side of the connecting plate facing the support tray. When the substrate moves the liquid injection needle close to the liquid injection hole, the horizontal limiting member abuts against the horizontal surface of the cell to be injected.

8. The cell electrolyte injection device according to claim 7, wherein, There are multiple horizontal side limiting members, which are distributed along the horizontal direction on the connecting plate. The multiple horizontal side limiting members form a second limiting gap. When the battery cell to be injected is located in the second limiting gap, the multiple horizontal side limiting members are used to abut against the surface of the battery cell to be injected along the horizontal direction.

9. The cell electrolyte injection device according to claim 8, wherein, The horizontal side limiting member has a guide slope on the side near the carrying tray, and the guide slope is inclined toward the second limiting gap.

10. The cell electrolyte injection device according to any one of claims 7 to 9, wherein, The cell to be injected with liquid is a cylindrical cell, and the horizontal side limiting member has an arc surface on the surface that abuts against the cylindrical cell along the horizontal direction. The arc surface is adapted to match the arc surface of the cylindrical cell along the horizontal direction.

11. The cell electrolyte injection device according to any one of claims 8 to 10, wherein, There are two horizontal side limiting members, which are distributed on the connecting plate at a 180-degree interval along the horizontal direction.

12. The cell electrolyte injection device according to any one of claims 7 to 11, wherein, The second limiting component also includes a hole limiting member, which is disposed on the side of the connecting plate facing the carrying tray. When the substrate drives the injection needle to move in the direction close to the injection part, the hole limiting member is used to abut against the surface of the cell to be injected along the vertical direction.

13. The cell electrolyte injection device according to claim 12, wherein, The hole limiting member has a second through hole, the axis of the second through hole is collinear with the axis of the first through hole, the second through hole is used to allow the injection needle to pass through, and the hole limiting member is used to abut against the rubber nail of the battery cell to be injected along the vertical direction.

14. The cell electrolyte injection device according to any one of claims 7 to 13, wherein, The liquid injection assembly further includes a mounting plate and a liquid injection cup. The mounting plate is connected to the base plate, the liquid injection cup is mounted on the base plate, and the liquid injection needle is connected to the liquid injection cup. The mounting plate is elastically connected to the connecting plate.

15. The cell electrolyte injection device according to any one of claims 1 to 14, wherein, The third limiting component includes a limiting groove provided on the base and a limiting protrusion provided on the carrier tray. When the carrier tray is placed on the base, the limiting protrusion and the limiting groove are adapted to limit the position of the carrier tray relative to the base.

16. The cell electrolyte injection device according to claim 15, wherein, The third limiting component also includes an adhesive member disposed on at least one of the limiting groove and the limiting protrusion, and the carrying tray is bonded to the base through the adhesive member.

17. The cell electrolyte injection device according to any one of claims 14 to 16, wherein, The liquid injection assembly further 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 disposed between the liquid injection cup and the liquid injection needle to control the on / off state of the liquid injection cup and the liquid injection needle. The liquid injection cup has a third through hole, and the sealing member is used to seal the third through hole.

18. The cell electrolyte injection device according to claim 17, wherein, The liquid injection assembly also includes a sealing cylinder, which is disposed on the substrate and connected to the sealing member to drive the sealing member to move on the substrate.

19. The cell electrolyte injection device according to any one of claims 1 to 18, wherein, One of the base and the substrate is provided with a sliding guide rail that moves in the vertical direction, and the other is provided with a slider that is slidably connected to the sliding guide rail.

20. A battery cell production line, comprising: The conveyor line is used to convey battery cells to be injected with liquid; Handling equipment; According to any one of claims 1 to 19, the cell liquid injection device, the conveying mechanism is used to convey the cell to be injected with liquid on the conveying line to the carrier tray of the cell liquid injection device.

Images