Fluid extrusion device

Abstract

The utility model belongs to the technical field of battery processing, and discloses a fluid extrusion device which comprises an inner pipe and an outer pipe which extend along the axial direction, the outer pipe is sleeved on the outer side of the inner pipe, a first hole group is arranged on the peripheral surface of the inner pipe, and the first hole group comprises at least two glue outlets which are arranged at intervals along the axial direction; the outer pipe comprises at least two adjusting pipes arranged in the axial direction, receding openings are formed in the peripheral faces of the adjusting pipes, and at least one adjusting pipe can independently rotate relative to the inner pipe, so that the receding openings are right opposite to or staggered from the corresponding glue outlets. By prolonging the length of the inner pipe and arranging a plurality of adjusting pipes, the positions and the number of the used glue outlets can be adjusted, the compatibility is higher, and the purposes of reducing the designing, processing and manufacturing time and reducing the economic cost in the trial-manufacturing stage are achieved.

Description

Technical Field

[0001] This utility model relates to the field of battery processing technology, and in particular to a fluid extrusion device. Background Technology

[0002] Currently, battery packs are sealed using a potting process to fix the internal cells, modules, and some structural components. Structures such as sealant strips are used to regulate the flow of the potting compound and the available potting space. However, the potting process is limited by existing equipment and tooling, making it difficult to directly insert the potting compound into the battery pack. Instead, a flow guide is often used to guide the potting compound of suitable viscosity slowly into the pack along the inner wall. Once it reaches the designated position, vibration is used to ensure the bottom of the pack is filled with the potting compound without any air bubbles that could affect its strength. However, this method requires high-quality adhesives and consumes significant manpower and resources, severely impacting the battery pack assembly schedule. Furthermore, because the potting is done manually and relies on gravity, the assembly speed of each battery pack varies considerably, leading to poor potting consistency and making it impossible to guarantee that each battery pack will be assembled at the same time and in the same internal state.

[0003] To address the aforementioned problems, existing technologies effectively alleviate these issues by adding a side-extrusion spray nozzle to the glue gun. However, this requires the spray nozzle to be designed individually based on the depth of each box, which consumes a significant amount of time and manpower, resulting in high economic costs and making it unsuitable for assembling a small number of samples. Utility Model Content

[0004] The purpose of this invention is to provide a fluid extrusion device that can solve the problems of high requirements for the performance parameters of adhesives, low and inconsistent assembly speed, poor potting consistency, and poor compatibility of existing adhesive spraying tubes.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A fluid extrusion apparatus, comprising:

[0007] An inner tube and an outer tube extending axially, wherein the outer tube is sleeved on the outside of the inner tube;

[0008] The outer circumferential surface of the inner tube is provided with a first hole group, the first hole group including at least two glue outlets spaced apart along the axial direction;

[0009] The outer tube includes at least two adjusting tubes arranged axially. The outer circumferential surface of the adjusting tube is provided with a clearance opening. At least one of the adjusting tubes can rotate independently relative to the inner tube so that the clearance opening is directly opposite or offset from the corresponding glue outlet.

[0010] As an alternative to the above-mentioned fluid extrusion device, two adjacent regulating tubes are detachably connected along the axial direction, and any one of the regulating tubes is connected to the inner tube through an anti-rotation component to limit the relative rotation of the regulating tube and the inner tube.

[0011] As an alternative to the aforementioned fluid extrusion device, in two adjacent regulating pipes, one regulating pipe is provided with at least two first connecting parts spaced apart along the circumference, and the other regulating pipe is provided with at least two second connecting parts spaced apart along the circumference. The first connecting parts and the second connecting parts are provided in a one-to-one correspondence and can be detachably connected.

[0012] As an alternative to the above-mentioned fluid extrusion device, the first connecting part is a first insertion block, which is formed by extending from the axial end of the regulating tube, and the second connecting part is a first insertion notch, which is formed by the inward recess of the axial end face of the regulating tube.

[0013] Alternatively, two adjacent regulating tubes may be nested together, with the first connecting part being a first locking hole and the second connecting part being a first locking protrusion, the first locking protrusion being able to lock into the first locking hole.

[0014] As an alternative to the aforementioned fluid extrusion device, the anti-rotation component includes:

[0015] A first anti-rotation structure is connected to the regulating pipe;

[0016] A second anti-rotation structure is connected to the inner tube. At least two of the first and / or second anti-rotation structures are provided along the circumference of the inner tube. The first anti-rotation structure can cooperate with the second anti-rotation structure to restrict the adjustment tube from rotating relative to the inner tube.

[0017] As an alternative to the above-mentioned fluid extrusion device, the first anti-rotation structure and the second anti-rotation structure are plugged in or snapped together.

[0018] As an alternative to the above-mentioned fluid extrusion device, the outer tube is slidably sleeved on the inner tube;

[0019] The fluid extrusion device further includes an elastic element connected to the inner tube and capable of applying an elastic force to the outer tube to connect at least two of the regulating tubes in sequence and to limit the axial position of the outer tube.

[0020] As an alternative to the aforementioned fluid extrusion device, the elastic element is sleeved outside the inner tube and extends along the axial direction of the inner tube.

[0021] As an alternative to the aforementioned fluid extrusion device, the inner tube includes:

[0022] The inner tube has openings at both axial ends, and the glue outlet is provided on the circumferential outer wall of the inner tube. The outer tube is sleeved on the inner tube.

[0023] An end cap is connected to one axial end of the inner tube body. The end cap can be connected to the adjacent regulating tube via the anti-rotation assembly. The elastic element is located at the end of the outer tube furthest from the end cap.

[0024] As an alternative to the aforementioned fluid extrusion device, the cross-sectional area of ​​at least two of the dispensing ports gradually decreases from one end to the other along the axial direction of the inner tube.

[0025] The beneficial effects of this utility model are:

[0026] The fluid extrusion device provided by this utility model, by extending the length of the inner tube and setting multiple adjusting tubes, allows for adjustment of the position and number of dispensing ports, resulting in greater compatibility and reducing the time and economic costs of design, processing, and manufacturing during the trial production stage. Furthermore, it has a wider range of applications and higher economic efficiency during the trial production stage, with more general applications and greater compatibility with different types of adhesives, box designs, and dispensing schemes; it significantly reduces the manpower and material consumption during box manufacturing and assembly, shortens installation time, accelerates production pace, and substantially reduces manufacturing costs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the fluid extrusion device provided by this utility model;

[0028] Figure 2 This is a cross-sectional view of the fluid extrusion device provided by this utility model;

[0029] Figure 3 yes Figure 1 A magnified view of a section at point A in the middle;

[0030] Figure 4 yes Figure 1 A magnified view of a section at point B in the middle;

[0031] Figure 5 This is a schematic diagram of the fluid extrusion device provided by this utility model when used in a battery pack;

[0032] Figure 6 This is a schematic diagram of the fluid extrusion device provided by this utility model when used in another type of battery pack.

[0033] In the picture:

[0034] 100. Fluid extrusion device; 10. Inner tube; 11. Inner tube body; 111. Glue outlet; 12. Connector; 121. Internal thread; 13. End cap; 14. Base; 20. Outer tube; 21. Adjusting tube; 211. Clearance opening; 212. First insertion block; 213. First insertion notch; 22. Top tube; 30. Elastic element; 40. Anti-rotation component; 41. Second insertion block; 42. Second insertion notch; 200. Housing; 300. Battery cell assembly; 400. Potting compound. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] Example 1

[0040] This embodiment provides a fluid extrusion device 100, which can extend into the glue-filling channel of the battery pack and be connected to a glue gun to fill the battery pack with glue, thereby fixing the cells, modules and some structural components inside the battery pack.

[0041] like Figure 1 and Figure 2 As shown, the fluid extrusion device 100 includes an inner tube 10 and an outer tube 20. The inner tube 10 is provided with a glue injection port, and the outer peripheral surface of the inner tube 10 is provided with a first group of holes, which includes at least two glue outlets 111 spaced apart along the axial direction. The outer tube 20 is sleeved on the inner tube 10 and includes at least two adjusting tubes 21 arranged along the axial direction. The outer peripheral surface of the adjusting tube 21 is provided with a clearance port 211. Each adjusting tube 21 can rotate relative to the inner tube 10 so that the clearance port 211 is directly opposite or offset from the corresponding glue outlet 111.

[0042] When using the fluid extrusion device 100, the fluid extrusion device 100 is inserted into the glue-filling channel of the battery pack. The glue injected by the glue gun has a certain spraying pressure. Under the action of the spraying pressure, the glue is discharged from the outer peripheral surface of the outer tube 20. It can achieve glue discharge at multiple heights and multiple glue discharge points, which is highly efficient and has good consistency in glue filling. This is conducive to ensuring that the assembly time and internal state of each battery pack are the same.

[0043] Furthermore, the fluid extrusion device 100 can selectively rotate the regulating tube 21 according to the height of the battery pack housing 200 and the parameters of the adhesive used, so that the clearance port 211 of the regulating tube 21 is aligned with or offset from the adhesive outlet 111, thereby adjusting the appropriate position for adhesive dispensing. When the clearance port 211 on the regulating tube 21 is offset from the corresponding adhesive outlet 111, the regulating tube 21 closes and blocks the corresponding adhesive outlet 111, which is in a closed state. When the clearance port 211 on the regulating tube 21 is aligned with the corresponding adhesive outlet 111, the interior of the inner tube 10 communicates with the exterior of the outer tube 20 sequentially through the adhesive outlet 111 and the clearance port 211, and the adhesive outlet 111 is in an open state. Through the above adjustments, the dispensing position and the number of open adhesive outlets 111 can be adjusted as needed, making it more flexible and more compatible with the type of adhesive, housing 200 design, and dispensing scheme.

[0044] In some embodiments, such as Figure 1 As shown, an injection port is provided at one axial end of the inner tube 10, and the injection port and at least two adjusting tubes 21 are arranged sequentially along the axial direction of the inner tube 10. When using the fluid extrusion device 100, the other axial end of the inner tube 10 is inserted downward into the battery pack housing 200, and at least two adjusting tubes 21 are arranged vertically and sleeved on the outside of the inner tube 10. Each adjusting tube 21 corresponds to a different injection height, so as to select an appropriate injection height according to the glue parameters and the height of the housing 200.

[0045] To facilitate glue application, the glue inlet is located at one axial end of the inner tube 10. In use, the other axial end of the inner tube 10 is inserted into the battery pack housing 200, while the end with the glue inlet is located outside the housing 200 for easy connection to the glue gun.

[0046] To prevent the state of the dispensing port 111 from changing due to the rotation of the regulating tube 21 during dispensing, in some embodiments, the fluid extrusion device 100 further includes an anti-rotation component 40. The anti-rotation component 40 can connect the outer tube 20 and the inner tube 10 to limit the rotation of the outer tube 20 relative to the inner tube 10, thereby ensuring that the dispensing position is fixed during dispensing.

[0047] In some embodiments, two adjacent adjusting pipes 21 are detachably connected along the axial direction, and either adjusting pipe 21 can be connected to the inner tube 10 via an anti-rotation component 40 to restrict the rotation of the adjusting pipe 21 relative to the inner tube 10. Specifically, one of the two adjacent adjusting pipes 21 is provided with a first connecting portion, and the other is provided with a second connecting portion, which are detachably connected. When the first connecting portion and the second connecting portion are connected, the relative rotation of the two adjacent adjusting pipes 21 can be restricted; when the first connecting portion and the second connecting portion are disengaged, the two adjacent adjusting pipes 21 can rotate relative to each other to adjust the angle of one adjusting pipe 21 relative to the inner tube 10 individually.

[0048] In order to ensure that adjacent regulating pipes 21 can be connected when the clearance port 211 on the regulating pipe 21 is facing or staggered with the corresponding glue outlet 111, at least two first connecting parts and two second connecting parts are provided, and the first connecting parts and the second connecting parts are provided in a one-to-one correspondence, so that two adjacent regulating pipes 21 have at least two connection angles.

[0049] like Figure 3 As shown, in one possible implementation, two adjacent regulating tubes 21 are axially inserted and fixed to restrict relative rotation between them. One of the first connecting portion and the second connecting portion is a first insertion block 212, and the other is a first insertion notch 213. The first insertion block 212 is formed by extending from the axial end of the regulating tube 21, and the first insertion notch 213 is formed by recessing from the axial end of the regulating tube 21. The first insertion block 212 can extend into the first insertion notch 213, which not only enables the splicing of the two adjacent regulating tubes 21, but also restricts relative rotation between them.

[0050] To ensure that each regulating tube 21 can rotate independently relative to the inner tube 10, at least two first plug-in blocks 212 are provided at intervals along the circumference of the regulating tube 21, so that adjacent regulating tubes 21 have at least two splicing angles, so that the regulating tube 21 can be connected to the adjacent regulating tube 21 when the clearance port 211 on any regulating tube 21 is directly opposite or offset from the corresponding glue outlet 111.

[0051] For example, four first plug-in blocks 212 are provided and are evenly spaced along the circumference of the adjusting tube 21, so that the adjusting tube 21 only needs to be rotated 90° to achieve the alignment or offset between its clearance opening 211 and the corresponding glue outlet 111. It should be noted that the number of first plug-in blocks 212 can be adjusted according to actual needs, and the number of first plug-in notches 213 is the same as the number of plug-in blocks, and they are set one-to-one.

[0052] Optionally, a first insertion block 212 is provided at one axial end of the regulating tube 21, and a first insertion notch 213 is provided at the other axial end, so that the structure of each regulating tube 21 is the same and any two regulating tubes 21 can be detachably connected, which helps to simplify the processing and reduce costs.

[0053] In another possible implementation, the ends of two adjacent adjusting tubes 21 can be nested and snapped together, thus achieving a detachable connection. For example, one of the first connecting portion and the second connecting portion is a first locking hole, and the other is a first locking protrusion. The first locking protrusion can be snapped into the first locking hole to fix the two adjacent adjusting tubes 21.

[0054] In some embodiments, combined with Figure 1 and Figure 4 As shown, the anti-rotation component 40 includes a first anti-rotation structure and a second anti-rotation structure. The first anti-rotation structure is connected to the regulating pipe 21; the second anti-rotation structure is connected to the inner pipe 10. At least two of the first and / or second anti-rotation structures are provided along the circumference of the inner pipe 10. The first anti-rotation structure can cooperate with the second anti-rotation structure to restrict the regulating pipe 21 from rotating relative to the inner pipe 10.

[0055] For example, such as Figure 1 and Figure 2 As shown, in the outer tube 20, the adjusting tube 21, which is far from the glue injection port, is connected to the inner tube 10 through the anti-rotation component 40 to constrain the rotation of the outer tube 20.

[0056] Optionally, such as Figure 4 As shown, the inner tube 10 includes an inner tube body 11 and an end cap 13 disposed at one end of the inner tube body 11. The end cap 13 blocks the axial opening of the inner tube body 11 so that the glue in the inner tube 10 can only be squeezed out through the glue outlet 111 on the outer peripheral surface, realizing lateral glue extrusion. A second anti-rotation structure is provided on the end cap 13, and a first anti-rotation structure is provided on the adjusting tube 21 on the outermost side away from the glue injection port.

[0057] In one possible implementation, one of the first anti-rotation structure and the second anti-rotation structure is a second insertion block 41 and the other is a second insertion notch 42. The second insertion block 41 can be inserted into the second insertion notch 42 to restrict the outer tube 20 from rotating relative to the inner tube 10.

[0058] The structure and engagement method of the second insertion block 41 and the second insertion notch 42 can be referenced from the first insertion block 212 and the first insertion notch 213. That is, the second insertion block 41 and the second insertion notch 42 can be engaged or disengaged by adjusting the axial movement of the adjusting tube 21. This will not be described in detail here.

[0059] In another possible implementation, one of the first anti-rotation structure and the second anti-rotation structure is a second locking hole, and the other is a second locking protrusion. The anti-rotation function is achieved by the locking cooperation between the second locking protrusion and the second locking hole.

[0060] In order to facilitate the adjustment of the angle of each adjusting tube 21, in some embodiments, the outer tube 20 is slidably sleeved outside the inner tube 10, so that each adjusting tube 21 in the outer tube 20 can move axially relative to the inner tube 10 to disengage from the adjacent adjusting tube 21, thereby facilitating the individual rotation adjustment of the relative position of the clearance port 211 and the glue outlet 111.

[0061] It should be noted that the inner diameter of the outer tube 20 and the outer diameter of the inner tube 10 should be matched, and the gap between them should not be too large. It is only necessary to ensure that the outer tube 20 and the inner tube 10 can slide and rotate relative to each other, so as to prevent the glue from overflowing from the glue outlet 111 into the gap between the inner tube 10 and the outer tube 20.

[0062] In order to stabilize the position of the regulating pipe 21 during use, the fluid extrusion device 100 also includes an elastic element 30. The elastic element 30 is connected to the inner pipe 10 and can apply an elastic force to the outer pipe 20 so that at least two regulating pipes 21 are connected in sequence and the axial position of the outer pipe 20 is restricted, thereby achieving axial positioning of the outer pipe 20 and ensuring the stability of the fluid extrusion device 100.

[0063] In some embodiments, the elastic element 30 is located at one axial end of the outer tube 20, and the elastic element 30 applies an elastic force to its adjacent regulating tube 21 to drive at least two regulating tubes 21 to abut against each other in sequence.

[0064] To make the structure more compact, in some embodiments, the elastic element 30 is sleeved outside the inner tube 10, and the inner tube 10 guides the elastic element 30 to ensure the stability of the direction of the elastic force provided by the elastic element 30.

[0065] Optionally, the elastic element 30 can be a spring, which has a simple structure, low cost, and stable structure. Optionally, the elastic element 30 extends along the axial direction of the inner tube 10, such that the direction of the elastic force of the elastic element 30 is parallel to the axial direction of the inner tube 10. That is, the direction of the elastic force is the same as the detachable direction of the two adjacent adjusting tubes 21. By adjusting the deformation state of the elastic element 30, space can be reserved for the disassembly and installation of the adjusting tube 21.

[0066] like Figure 1 and Figure 2 As shown, in some embodiments, the elastic element 30 can be a compression spring. When the compression spring is not subjected to external force, it can push the outer tube 20 away from the glue injection port of the inner tube 10, so that the adjusting tubes 21 are connected in sequence, and the outermost adjusting tube 21 in the direction away from the glue injection port is connected to the end cap 13, thereby realizing the axial and circumferential positioning of the outer tube 20. When it is necessary to adjust the angle of a certain adjusting tube 21, the compression spring can be manually compressed, so that the adjusting tube 21 that needs to be rotated has space to move towards the glue injection port, thereby allowing the adjusting tube 21 to disengage from the adjacent adjusting tube 21 or the end cap 13, facilitating its rotation.

[0067] To increase the number of dispensing ports 111, the number of dispensing ports 111 in the first hole group can be set to multiple, such as 3, 4, 5, 6 or more. For example, the number of dispensing ports 111 in the first hole group can be 10.

[0068] To increase the flexibility of dispensing position adjustment, the number of adjusting tubes 21 can be set to multiple, such as 3, 4, 5, 6 or more. Figure 1 As shown, in some embodiments, the outer tube 20 includes five adjusting tubes 21, each adjusting tube 21 being provided with a second hole group, and each second hole group including two clearance openings 211 spaced apart along the axial direction.

[0069] It should be noted that the number of regulating tubes 21, the number of clearance ports 211 in each second hole group, and the number of dispensing ports 111 in each first hole group can all be set according to actual needs, and there are no restrictions here.

[0070] To improve dispensing efficiency, in some embodiments, the inner tube 10 is provided with two first hole groups, which are symmetrically arranged with respect to the axial center of the inner tube 10. The outer tube 20 is provided with two corresponding second hole groups, with the first and second hole groups arranged in a one-to-one correspondence. When using the fluid extrusion device 100 for dispensing, the fluid extrusion device 100 is inserted into the housing 200, enabling dispensing of adhesive to the opposite sides of the fluid extrusion device 100, thereby improving dispensing efficiency.

[0071] In other embodiments, the number of first hole groups can be set to three, four or more, and multiple first hole groups are arranged at intervals along the circumference of the inner tube 10 to achieve multi-angle glue dispensing.

[0072] To facilitate connection to the glue gun, in some embodiments, the inner tube 10 further includes a connector 12, which is connected to one end of the inner tube body 11 without the end cap 13. The connector 12 is used to connect the glue gun for easy glue dispensing. Optionally, the connector 12 can be integrally formed with the inner tube body 11.

[0073] Optionally, the inner wall of the connector 12 is provided with an internal thread 121, and the connector 12 can be connected to the glue gun through the internal thread 121 for easy disassembly.

[0074] Optionally, the end cap 13 includes a cover plate and a protrusion. The protrusion is disposed on the cover plate, and the outer diameter of the cover plate is larger than the outer diameter of the inner tube 11. On the one hand, the cover plate can block the opening of the inner tube 11, and on the other hand, it can abut against the end face of the outer tube 20 to restrict the axial position of the outer tube 20. The second anti-rotation structure is connected to the edge of the cover plate and is located on the circumferential outer side of the inner tube 11 to connect with the first anti-rotation structure. The protrusion extends into the inner tube 11 and is threadedly connected to the inner tube 11 to facilitate disassembly.

[0075] When assembling the fluid extrusion device 100, the outer tube 20 can be first fitted onto the inner tube 11 from the end without the end cap 13, and then the end cap 13 can be installed.

[0076] In some embodiments, the outer tube 20 further includes a top tube 22, which is located on the side of at least two adjusting tubes 21 near the elastic member 30. The top tube 22 is detachably connected to the adjacent adjusting tube 21. One end of the elastic member 30 is connected to the inner tube 10, and the other end is connected to the top tube 22. By applying an elastic force to the top tube 22, the adjusting tubes 21 are pushed in sequence.

[0077] It should be noted that the connection method between the jacking pipe 22 and the adjacent regulating pipe 21, as well as the connection method between two adjacent regulating pipes 21, can be the same, and will not be elaborated here.

[0078] In some embodiments, a base 14 is provided on the outer circumferential surface of the inner tube 11, one end of the elastic element 30 is connected to the base 14, and the other end is connected to the top tube 22, so as to ensure that the extension direction of the elastic element 30 is approximately parallel to the axis of the inner tube 10, thereby improving the accuracy of the direction of the elastic force.

[0079] To prevent the outer tube 20 from affecting the amount of glue dispensed from the glue outlet 111, the cross-sectional area of ​​the clearance opening 211 is greater than or equal to the cross-sectional area of ​​the glue outlet 111, so as to avoid blocking the glue outlet 111.

[0080] To improve the glue-filling effect, in some embodiments, the cross-sectional area of ​​at least two glue outlets 111 in the first hole group gradually decreases from one end to the other along the axial direction of the inner tube 10. When using the fluid extrusion device 100, the end with the smaller cross-sectional area of ​​the glue outlet 111 is inserted downwards into the battery pack, so that the cross-sectional area of ​​at least two glue outlets 111 gradually decreases along the direction of insertion into the battery pack. That is, the size of the glue outlet 111 closer to the bottom of the housing 200 is smaller, thereby increasing the glue-filling pressure at the glue outlet 111 near the bottom of the housing 200, increasing the glue-filling speed, facilitating rapid filling of the bottom of the housing 200, and avoiding insufficient glue filling at the bottom of the housing 200.

[0081] To improve the compatibility of the fluid extrusion device 100, the lengths of the inner tube 10 and outer tube 20 can be set with reference to the depth of a commonly used housing 200 and the structure of its internal dispensing channel, ensuring that the length of the outer tube 20 of the fluid extrusion device 100 meets the dispensing requirements of a common housing 200. Then, the diameter and spacing of the dispensing nozzle 111 are adjusted according to the viscosity of the adhesive and the parameters of the dispensing equipment such as the glue gun.

[0082] For example, the housing 200 with a depth of less than 300 mm can use the same fluid extrusion device 100, for example, the length of the inner tube 10 can be 330 mm or 400 mm.

[0083] To reduce the requirements for the size of the dispensing channel, the outer tube 20 and the inner tube 10 can be tightly fitted together, as long as relative sliding and rotation can be guaranteed; the wall thickness of the inner tube 10 and the outer tube 20 can be controlled within 0.5mm.

[0084] Optionally, different adjustment tubes 21 can be set with different colors to distinguish the glue dispensing depth or the depth of the corresponding box 200.

[0085] Understandably, to ensure efficient adjustment of the dispensing position, the number of clearance ports 211 on each second hole group can be set to be relatively large, such as three or four; to adjust the dispensing position more precisely, the number of clearance ports 211 on each second hole group can be set to be relatively small, such as one or two. Optionally, the number of clearance ports 211 in the second hole groups on different adjusting tubes 21 can be different, so as to customize the combination according to different needs.

[0086] The steps for dispensing adhesive using the fluid extrusion device 100 described above are as follows:

[0087] The glue dispensing position is selectively adjusted based on the box depth of 200mm and the adhesive parameters. For example, such as... Figure 5 As shown, when the depth of the housing 200 is relatively small, rotate the adjusting pipe 21 near the glue inlet so that the clearance opening 211 on the adjusting pipe 21, which is higher than the housing 200, is staggered from the corresponding glue outlet 111; as shown Figure 6 As shown, when the depth of the housing 200 is large, rotate all the clearance ports 211 on the regulating pipes 21 to face the corresponding glue outlets 111. Then connect the fluid extrusion device 100 to the glue pumping equipment, start the glue pumping equipment, fill the inner tube 10 with glue and let a little overflow from each of the opened glue outlets 111, and then turn off the glue pumping equipment.

[0088] The fluid extrusion device 100 is inserted into the potting channel between the housing 200 and the battery cell assembly 300. The potting compound 400 is then activated, and it is simultaneously extruded from the outlet 111, spraying at the same time onto opposite sides of the fluid extrusion device 100. It should be noted that the spraying path of the compound varies depending on the pressure. During spraying, the potting compound 400 sprayed from different outlets 111 flows down the inner wall of the housing 200 due to gravity. Once the preset amount of compound is reached, the pump is turned off, and the fluid extrusion device 100 is withdrawn, simultaneously replenishing the compound to any empty spaces.

[0089] Shake the battery pack to remove internal air bubbles, let it stand and wait for the potting compound to cure at 400°C.

[0090] In this embodiment, by extending the length of the inner tube 10 and setting multiple adjusting tubes 21, the position and number of the dispensing ports 111 can be adjusted, resulting in greater compatibility and reducing the time and economic costs of design, processing, and manufacturing during the trial production stage. Furthermore, it has a wider range of applications and higher economic efficiency during the trial production stage, with more general applications and greater compatibility with different types of adhesives, the design of the housing 200, and the dispensing scheme; it significantly reduces the manpower and material consumption during the manufacturing and assembly process of the housing 200, shortens installation time, accelerates production pace, and significantly reduces manufacturing costs.

[0091] Example 2

[0092] This embodiment provides a fluid extrusion device 100, which has a structure that is roughly the same as the fluid extrusion device 100 in Embodiment 1. The difference is that two adjacent regulating tubes 21 may not be connected. Instead, each regulating tube 21 is connected to the inner tube 10 through an anti-rotation component 40 to fix each regulating tube 21 to the inner tube 10, thereby limiting the rotation of each regulating tube 21 and fixing the dispensing position.

[0093] In one possible implementation, the anti-rotation component 40 includes a third locking hole and a third locking protrusion that engage with each other. One of the third locking hole and the third locking protrusion is disposed on the inner tube 10, and the other is disposed on the adjusting tube 21. At least two of the third locking holes and the third locking protrusions are provided at circumferential intervals along the adjusting tube 21, so that the adjusting tube 21 can be fixed at at least two angles where the clearance port 211 is directly opposite to and offset from the glue outlet 111.

[0094] Preferably, the third snap-fit ​​protrusion is provided on the outer circumferential surface of the inner tube 10, and the third snap-fit ​​hole is provided on the outer tube 20, so as to ensure the sealing of the inner tube 10 and prevent the inner tube 10 from leaking glue through the third snap-fit ​​hole.

[0095] In another possible implementation, the anti-rotation component 40 includes a clamp that is fitted over the regulating pipe 21 to tighten the regulating pipe 21 and restrict the regulating pipe 21 from rotating relative to the inner pipe 10.

[0096] In another possible implementation, the anti-rotation component 40 includes a first abutment block and a second abutment block. At least two sets of first abutment blocks are provided on the outer peripheral surface of one of the regulating tube 21 and the inner tube 10. Each set of first abutment blocks includes two first abutment blocks spaced apart circumferentially. The other of the regulating tube 21 and the inner tube 10 is provided with a second abutment block. The second abutment block can be inserted between the two first abutment blocks in the same set to restrict the rotation of the regulating tube 21 relative to the inner tube 10.

[0097] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A fluid extrusion apparatus, characterized in that, include: An inner tube (10) and an outer tube (20) extending along the axial direction, wherein the outer tube (20) is sleeved on the outside of the inner tube (10); The outer circumferential surface of the inner tube (10) is provided with a first hole group, the first hole group including at least two glue outlets (111) arranged axially at intervals; The outer tube (20) includes at least two adjusting tubes (21) arranged along the axial direction. The outer circumferential surface of the adjusting tube (21) is provided with a clearance opening (211). At least one of the adjusting tubes (21) can rotate independently relative to the inner tube (10) so that the clearance opening (211) is directly opposite or offset from the corresponding glue outlet (111).

2. The fluid extrusion apparatus according to claim 1, characterized in that, The two adjacent regulating tubes (21) are detachably connected along the axial direction. Each regulating tube (21) is connected to the inner tube (10) through an anti-rotation component (40) to restrict the relative rotation of the regulating tube (21) and the inner tube (10).

3. The fluid extrusion apparatus according to claim 2, characterized in that, In two adjacent regulating tubes (21), one regulating tube (21) is provided with at least two first connecting parts spaced apart along the circumference, and the other regulating tube (21) is provided with at least two second connecting parts spaced apart along the circumference. The first connecting parts and the second connecting parts are provided in a one-to-one correspondence and can be detachably connected.

4. The fluid extrusion apparatus according to claim 3, characterized in that, The first connecting part is a first plug-in block (212), which is formed by extending from the axial end of the adjusting tube (21); the second connecting part is a first plug-in notch (213), which is formed by the inward recess of the axial end face of the adjusting tube (21). Alternatively, two adjacent regulating tubes (21) are nested together, the first connecting part is a first locking hole, the second connecting part is a first locking protrusion, and the first locking protrusion can be locked into the first locking hole.

5. The fluid extrusion apparatus according to claim 2, characterized in that, The anti-rotation component (40) includes: The first anti-rotation structure is connected to the regulating pipe (21); The second anti-rotation structure is connected to the inner tube (10). At least two of the first anti-rotation structure and / or the second anti-rotation structure are provided along the circumference of the inner tube (10). The first anti-rotation structure can cooperate with the second anti-rotation structure to restrict the adjustment tube (21) from rotating relative to the inner tube (10).

6. The fluid extrusion apparatus according to claim 5, characterized in that, The first anti-rotation structure and the second anti-rotation structure are plugged in or snapped together.

7. The fluid extrusion apparatus according to claim 2, characterized in that, The outer tube (20) is slidably sleeved on the inner tube (10); The fluid extrusion device further includes an elastic element (30) that connects to the inner tube (10) and applies an elastic force to the outer tube (20) to connect at least two of the regulating tubes (21) in sequence and to limit the axial position of the outer tube (20).

8. The fluid extrusion apparatus according to claim 7, characterized in that, The elastic element (30) is sleeved outside the inner tube (10) and extends along the axial direction of the inner tube (10).

9. The fluid extrusion apparatus according to claim 7, characterized in that, The inner tube (10) includes: The inner tube is open at both ends along its axial direction, and the outer wall of the inner tube is provided with the glue outlet (111). The outer tube (20) is sleeved on the inner tube. End cap (13), the end cap (13) is connected to one axial end of the inner tube body, the end cap (13) can be connected to the adjacent regulating tube (21) through the anti-rotation component (40), the elastic element (30) is located at the end of the outer tube (20) away from the end cap (13).

10. The fluid extrusion apparatus according to any one of claims 1-9, characterized in that, Along the axial direction of the inner tube (10), the cross-sectional area of ​​at least two of the glue outlets (111) gradually decreases from one end to the other.

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