A liquid injection tool and liquid injection device

Abstract

The utility model discloses a kind of liquid injection tool and liquid injection device, including isolation box and clamping assembly, isolation box is formed with containing cavity, at least one installation site is arranged in containing cavity;Clamping assembly is used to clamp battery, clamping assembly is detachably positioned and installed in installation site.Solve the technical problem that it is inconvenient to detach and install clamp from liquid injection equipment to prevent electrolyte from leaking to the surface of equipment.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a liquid injection fixture and a liquid injection device. Background Technology

[0002] In the electrolyte filling process of pouch batteries, clamps are typically used to position and fix the cells to ensure stable cell position and accurate orientation of the filling port during the filling process. Currently, clamps are generally mounted on the workbench or support frame of the filling equipment and secured by bolts, clips, or sliding rails. However, during the filling process, the electrolyte has a certain degree of volatility and permeability, easily flowing along the outer surface of the cell or the edge of the clamp onto the equipment surface, causing electrolyte contamination. After the electrolyte solidifies, it forms crystals or an adhesion layer on the equipment, affecting the reliability of equipment operation and potentially even corroding the equipment surface, making it difficult to remove and install the clamps. Therefore, how to design a clamp that facilitates quick installation and removal on the filling equipment while effectively preventing electrolyte leakage to the equipment surface has become a pressing technical problem to be solved in this field. Utility Model Content

[0003] One objective of this utility model is to provide a liquid injection fixture, which aims to solve the technical problem of preventing electrolyte leakage to the surface of the equipment, thus making it inconvenient to disassemble and install the fixture from the liquid injection equipment.

[0004] To achieve the above objectives, in a first aspect, the present invention provides a solution as follows: a liquid injection fixture, comprising: an isolation box, the isolation box having a receiving cavity, and at least one mounting position provided in the receiving cavity; A clamping assembly for clamping the battery, the clamping assembly being detachably positioned and mounted in the mounting position.

[0005] Optionally, the top of the receiving cavity is open for battery liquid injection, and the mounting position includes a first positioning structure formed by a protrusion / recess at the bottom of the receiving cavity, and a second positioning structure formed by a recess / protrusion at the bottom of the clamping assembly that cooperates with the first positioning structure, so as to realize the positioning and mounting of the clamping assembly in the mounting position.

[0006] Optionally, the first positioning structure and the second positioning structure are inserted into each other.

[0007] Optionally, one of the first positioning structure and the second positioning structure includes a protrusion, and the other includes a groove in which the protrusion slides. The injection fixture includes a first fastener for connecting the isolation box and the clamping assembly after the protrusion is positioned into the groove.

[0008] Optionally, each mounting position includes multiple first positioning structures, which are symmetrically arranged with respect to the center of the mounting position. The number of second positioning structures is the same as the number of first positioning structures, and the second positioning structures correspond one-to-one with the first positioning structures.

[0009] Optionally, the injection fixture includes a second fastener. Among the multiple first positioning structures corresponding to each mounting position, some of the first positioning structures are threadedly connected to the second positioning structure through the first fastener, while the remaining first positioning structures are plugged into the second positioning structure through the second fastener.

[0010] Optionally, the clamping assembly includes: a first jaw, a second jaw, and a first locking member, wherein the first jaw and the second jaw are disposed opposite to each other along a first direction and can slide relative to each other along the first direction to clamp the battery from the first direction, and the first locking member is used to lock the first jaw and the second jaw to limit the relative sliding of the first jaw and the second jaw.

[0011] Optionally, the clamping assembly further includes: a third jaw, a fourth jaw, and a plurality of second locking members, wherein the third jaw and the fourth jaw are slidably disposed relative to each other along a second direction, and the second locking members are used to lock the third jaw and the fourth jaw to limit the relative sliding of the third jaw and the fourth jaw; The second direction is perpendicular to the first direction.

[0012] Optionally, the third or fourth gripper has a clearance groove for avoiding the battery tabs.

[0013] Optionally, the clamping assembly further includes a fifth gripper and a third locking member, the fifth gripper being slidable in a third direction, the fifth gripper being used to support the bottom of the battery, and the third locking member being used to lock the fifth gripper to limit the sliding of the fifth gripper in a third direction.

[0014] In a second aspect, there is a liquid injection device, comprising an installation platform and a liquid injection fixture as described in any of the first aspects, wherein a plurality of liquid injection fixtures are detachably mounted on the installation platform around a rotation axis of the installation platform.

[0015] The beneficial effects of this utility model are as follows: The electrolyte injection fixture includes: an isolation box with a receiving cavity containing at least one mounting position; and a clamping assembly for clamping the battery, which is detachably positioned and installed at the mounting position. In practical applications, the isolation box forms the receiving cavity, and the mounting position within the cavity is used to install the clamping assembly. This structure allows the clamping assembly to be detachably positioned and installed in the mounting position during use, eliminating direct contact between the clamping assembly and the equipment. This design allows the receiving cavity formed by the isolation box to block and collect electrolyte flowing from the cell surface during the electrolyte injection process, confining the electrolyte within the isolation box and preventing it from flowing onto the equipment surface, thus effectively avoiding electrolyte contamination or corrosion. Furthermore, when removing the fixture from the equipment, the isolation box can be directly removed, improving the fixture removal efficiency. When installing the fixture, it can be directly positioned and installed at the mounting position, eliminating the need to measure dimensions before positioning. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the liquid injection device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the isolation box provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the clamping assembly provided in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the bottom structure of the clamping assembly provided in this embodiment of the utility model; Figure 5 This is a schematic diagram of the clamping assembly provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the clamping assembly provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the clamping assembly provided in an embodiment of the present invention.

[0018] Explanation of icon numbers: 20. Isolation box; 21. Receiving cavity; 30. Mounting position; 31. First positioning structure; 311. Protrusion; 32. Center of mounting position; 40. Clamping assembly; 41. Second positioning structure; 411. Slide groove; 42. First gripper; 43. Second gripper; 44. Third gripper; 45. Fourth gripper; 451. Relief groove; 46. Fifth gripper; 50. Mounting platform; 60. Battery; 70. First direction; 80. Second direction; 90. Third direction. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1 to 4 As shown, Figure 1 This is a schematic diagram of the liquid injection device provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of the isolation box 20 provided in this embodiment of the utility model. Figure 3 This is a schematic diagram of the structure of the clamping component 40 provided in this embodiment of the utility model. Figure 4 This is a schematic diagram of the bottom structure of the clamping component 40 provided in this embodiment of the utility model.

[0021] This utility model provides a liquid injection device, including a mounting platform 50 and injection fixtures. Multiple injection fixtures are detachably mounted on the mounting platform 50 around its rotation axis. During liquid injection, the mounting platform 50 rotates the injection fixtures to the corresponding positions to complete the corresponding process.

[0022] Specifically, the injection fixture includes: an isolation box 20, which has a receiving cavity 21, and at least one mounting position 30 is provided in the receiving cavity 21; and a clamping assembly 40 for clamping the battery 60, which is detachably positioned and mounted on the mounting position 30.

[0023] In practical applications, the isolation box 20 forms a receiving cavity 21, and a mounting position 30 is provided in the receiving cavity 21 for mounting the clamping assembly 40. Through this structure, the clamping assembly 40 can be detachably positioned and installed in the mounting position 30 during use, so that the clamping assembly 40 no longer has direct contact with the equipment. In this way, the receiving cavity 21 formed by the isolation box 20 can block and collect the electrolyte flowing from the surface of the battery cell during the electrolyte injection process, confining the electrolyte within the internal space of the isolation box 20 and preventing it from flowing onto the equipment surface, thereby effectively avoiding contamination or corrosion of the equipment surface by the electrolyte. Furthermore, when removing the clamp from the equipment, the isolation box 20 can be directly removed from the equipment, thereby improving the removal efficiency of the clamp. When installing the clamp, the clamp can be directly positioned and installed in the mounting position 30, thus eliminating the need to measure the position dimensions and then position the clamp.

[0024] In one embodiment, see Figure 2 and Figure 4 The top of the receiving cavity 21 is open for filling the battery 60 with liquid. The mounting position 30 includes a first positioning structure 31 formed by a protrusion / recess at the bottom of the receiving cavity 21. The bottom of the clamping assembly 40 is recessed / protruded to form a second positioning structure 41 that cooperates with the first positioning structure 31, so as to realize the positioning and installation of the clamping assembly 40 in the mounting position 30.

[0025] In practical applications, on the one hand, the cooperation between the first positioning structure 31 and the second positioning structure 41 can achieve automatic alignment during the installation of the clamping assembly 40, ensuring that the clamping assembly 40 is accurately positioned in the receiving cavity 21, and fixing and aligning the direction of the liquid injection port of the battery 60, thereby ensuring that the liquid injection needle or liquid injection tube can be accurately aligned with the liquid injection port, improving the liquid injection efficiency and consistency; on the other hand, the concave-convex fit formed by the positioning structure has anti-slip capability, which can prevent the clamping assembly 40 from shifting due to electrolyte flow or equipment vibration during the liquid injection process, thereby maintaining the stability of the cell posture.

[0026] Optionally, see Figure 2 and Figure 4 The first positioning structure 31 and the second positioning structure 41 are inserted and fitted together.

[0027] In practical applications, the plug-in mating can guide the first and second mounting structures during installation, enabling the clamping component 40 to automatically align with the mounting position 30 along a specific direction, thereby reducing manual positioning errors and improving assembly efficiency. After plugging in, the relative position between the two is restricted, which can effectively prevent the clamping component 40 from shaking or shifting due to vibration or electrolyte scouring during the liquid injection process, ensuring the stability of the cell's posture and consistency with the liquid injection direction during the liquid injection process.

[0028] Further, see Figure 2 and Figure 4The first positioning structure 31 and the second positioning structure 41 include a protrusion 311 and the other includes a groove 411 that slides with the protrusion 311. The injection fixture includes a first fastener for connecting the isolation box 20 and the clamping assembly 40 after the protrusion 311 is positioned into the groove 411.

[0029] In practical applications, by setting the protrusion 311 between the first positioning structure 31 and the second positioning structure 41 to cooperate with the slide groove 411, and using the first fastener to connect the isolation box 20 and the clamping assembly 40, the technical effect of adjustable positioning and stable fixation of the clamping assembly 40 is achieved. During installation, the operator can slide the protrusion 311 of the clamping assembly 40 along the direction of the slide groove 411, and adjust the specific position of the clamping assembly 40 in the receiving cavity 21 by adjusting the length range of the slide groove 411 to accommodate cells of different sizes or different injection port positions. After the clamping assembly 40 is adjusted to the required position, the first fastener makes the protrusion 311 and the end of the slide groove 411 tightly abut and lock the position, thereby achieving stable fixation of the clamping assembly 40 in different positions.

[0030] In this embodiment, the first positioning structure 31 is a protrusion 311 with a threaded hole, the second positioning structure 41 is a groove 411, the first fastener is a bolt, the screw of the first fastener passes through the groove 411 and is threadedly engaged with the threaded hole, the screw head of the first fastener is located on the side of the clamping assembly 40 away from the protrusion 311 and abuts against the clamping assembly 40, so that the first fastener can press the clamping assembly 40.

[0031] Optionally, see Figure 5 , Figure 6 and Figure 7 Each mounting position 30 includes multiple first positioning structures 31, which are symmetrically arranged relative to the center 32 of the mounting position. The number of second positioning structures 41 is the same as the number of first positioning structures 31, and the second positioning structures 41 correspond to the first positioning structures 31 one by one.

[0032] In practical applications, multiple symmetrically arranged first positioning structures 31 collectively define the position of the clamping component 40, enabling the clamping component 40 to automatically correct its posture during installation and maintain its center position consistent with the mounting position 30, thereby avoiding tilting or eccentricity caused by single-point positioning. When the clamping component 40 is subjected to external forces, multiple positioning points share the load and support each other, forming a stable support state with multiple points of force, effectively reducing stress concentration at single-point connections and preventing the clamping component 40 from shaking or shifting.

[0033] Further, see Figure 5 , Figure 6 and Figure 7The injection fixture includes a second fastener. Among the multiple first positioning structures 31 corresponding to each mounting position 30, some of the first positioning structures 31 are threadedly connected to the second positioning structure 41 through the first fastener (not shown in the figure), and the remaining first positioning structures 31 are plugged into the second positioning structure 41 through the second fastener (not shown in the figure).

[0034] In practical applications, by employing a combination of threaded connections and plug-in fits in the multiple first positioning structures 31 at each mounting position 30, the clamping assembly 40 achieves a technical effect that is both stable and easy to adjust during positioning and installation. During installation, the threaded connection between some of the first positioning structures 31 and the second positioning structure 41 via first fasteners provides reliable axial preload, ensuring the clamping assembly 40 remains fixed in position during electrolyte impact and equipment vibration in the electrolyte injection process, preventing loosening or displacement. Simultaneously, the remaining first positioning structures 31 are plugged into the second positioning structures 41 via second fasteners, allowing for fine-tuning along the sliding direction while ensuring precise positioning of the clamping assembly 40. This enables the clamping assembly 40 to adapt to battery cells of different sizes or with different injection port positions. The combination of threaded connections and plug-in fits creates a stable multi-point constraint under stress while retaining some adjustability, giving the clamping assembly 40 both high positioning accuracy and ease of quick installation and disassembly.

[0035] Optionally, see Figure 5 , Figure 6 and Figure 7 The clamping assembly 40 includes a first gripper 42, a second gripper 43, and a first locking member (not shown in the figures). The first gripper 42 and the second gripper 43 are disposed opposite to each other along a first direction 70 and are slidable relative to each other along the first direction 70 for clamping the battery 60 from the first direction 70. The first locking member is used to lock the first gripper 42 and the second gripper 43 to limit the relative sliding of the first gripper 42 and the second gripper 43.

[0036] In practical applications, the first gripper 42 and the second gripper 43 slide relative to each other along the first direction 70, adjusting the clamping gap according to changes in the thickness or size of the battery 60. After clamping, the first locking member locks the first gripper 42 and the second gripper 43, restricting their relative sliding. This ensures that the clamping assembly 40 maintains a constant clamping state under liquid injection operations and external vibrations, preventing the battery 60 from loosening or shifting. Through this structural design combining sliding adjustment and locking, the clamping assembly 40 can ensure the positioning stability of the battery 60 while also accommodating the flexibility of different battery cell specifications.

[0037] In this embodiment, the first gripper 42 is provided with a plurality of threaded holes spaced apart along the first direction 70, and the second gripper 43 is provided with a continuous through hole along the first direction 70, so that the first gripper 42 and the second gripper 43 can move relative to each other along the first direction 70 to adjust the distance between the first gripper 42 and the second gripper 43, thereby achieving the effect of adapting to batteries 60 of different sizes. The first locking member passes through the through hole and is threadedly engaged with the threaded hole, thereby achieving the locking of the first gripper 42 and the second gripper 43.

[0038] In this embodiment, the first gripper 42 is provided with a second positioning structure 41, and the first gripper 42 is detachably positioned and installed on the isolation box 20 through the second positioning structure 41. The second gripper 43 is slidably connected to the first gripper 42. In other embodiments, the second gripper 43 may also be provided with a second positioning structure 41, and the second gripper 43 may be detachably positioned and installed on the isolation box 20 through the second positioning structure 41. The first gripper 42 may be slidably connected to the second gripper 43. Alternatively, both the first gripper 42 and the second gripper 43 may be provided with a second positioning structure 41, and both the first gripper 42 and the second gripper 43 may be detachably positioned and installed on the isolation box 20 through the second positioning structure 41. Furthermore, the clamping assembly may also include a bracket, which is provided with a second positioning structure 41. The first gripper 42 may be detachably positioned and installed on the isolation box 20 through the second positioning structure 41, and both the first gripper 42 and the second gripper 43 may be slidably connected to the bracket.

[0039] In one embodiment, see Figure 5 , Figure 6 and Figure 7 The clamping assembly 40 further includes a third jaw 44, a fourth jaw 45, and a plurality of second locking members (not shown in the figures). The third jaw 44 and the fourth jaw 45 are slidably disposed relative to each other along a second direction 80. The second locking members are used to lock the third jaw 44 and the fourth jaw 45 to limit the relative sliding of the third jaw 44 and the fourth jaw 45. The second direction 80 is perpendicular to the first direction 70.

[0040] In practical applications, a third gripper 44, a fourth gripper 45, and multiple second locking elements are added to the clamping assembly 40, enabling the clamping assembly 40 to clamp the battery 60 in the second direction 80 and form an orthogonal clamping system with the clamping in the first direction 70, achieving multi-directional constraint. During use, the third gripper 44 and the fourth gripper 45 slide relative to each other along the second direction 80, and can be adjusted according to changes in the width or size of the battery 60, keeping the battery 60 in a stable position in the second direction 80. After clamping is completed, the second locking elements lock the third gripper 44 and the fourth gripper 45, restricting their relative sliding, thereby preventing the battery 60 from lateral displacement under liquid injection operations or vibration.

[0041] The relative sliding method of the third jaw 44 and the fourth jaw 45 is the same as the relative sliding method of the first jaw 42 and the second jaw 43. The method by which the second locking member locks the third jaw 44 and the fourth jaw 45 is the same as the method by which the first locking member locks the first jaw 42 and the second jaw 43, so it will not be described in detail here.

[0042] Optionally, refer to Figure 6 and Figure 7 The third gripper 44 or the fourth gripper 45 has a clearance groove 451 for avoiding the tabs of the battery 60.

[0043] In practical applications, when the battery 60 is placed in the clamping assembly 40, the tab part will be aligned with the relief groove 451 of the third clamp 44 or the fourth clamp 45, so that the clamp will not contact or squeeze the tab while clamping the battery 60, thereby avoiding deformation of the battery 60, damage to the tab or clamping failure due to local force.

[0044] Optionally, see Figure 5 , Figure 6 and Figure 7 The clamping assembly 40 also includes a fifth gripper 46 and a third locking member (not shown in the figures). The fifth gripper 46 is slidable along a third direction 90 and is used to support the bottom of the battery 60. The third locking member is used to lock the fifth gripper 46 to limit the sliding of the fifth gripper 46 along the third direction 90.

[0045] In practical applications, during use, the fifth gripper 46 slides along the third direction 90 to accommodate batteries 60 of different thicknesses, so that the battery 60 is supported in the height direction perpendicular to the first direction 70 and the second direction 80, preventing the battery 60 from tilting or shifting due to gravity or external vibration; after the third locking member is adjusted to the appropriate position, it locks the fifth gripper 46, restricting it from sliding along the third direction 90, so that the bottom of the battery 60 is stably supported.

[0046] In this embodiment, the clamping assembly 40 has a channel extending along a third direction 90, through which the first clamping claw 42 and / or the second clamping claw 43 pass. The fifth clamping claw 46 is inserted between the first clamping claw 42 and the second clamping claw 43 through the channel, thereby supporting the bottom of the battery 60. The sliding mechanism of the fifth clamping claw 46 is the same as that of the sliding mechanism of the first clamping claw 42 and the second clamping claw 43, and the locking mechanism of the third locking member is the same as that of the first locking member, so it will not be described in detail here.

[0047] In other embodiments of this application, the clamping component 40 is provided with scales along the first direction 70, the second direction 80, and the third direction 90, so as to adjust the positions of the first clamp 42, the second clamp 43, the third clamp 44, the fourth clamp 45, and the fifth clamp 46 according to the scales.

[0048] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0049] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0050] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0051] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A liquid injection fixture, characterized in that, include: An isolation box having a receiving cavity, wherein at least one mounting position is provided in the receiving cavity; A clamping assembly for clamping a battery, the clamping assembly being detachably positioned and mounted at the mounting location.

2. The injection fixture according to claim 1, characterized in that, The top of the receiving cavity is open for battery electrolyte filling. The mounting position includes a first positioning structure formed by a protrusion or recess at the bottom of the receiving cavity. The bottom of the clamping assembly is recessed or protruding to form a second positioning structure that cooperates with the first positioning structure, so as to realize the positioning and installation of the clamping assembly in the mounting position.

3. The injection fixture according to claim 2, characterized in that, The first positioning structure and the second positioning structure are inserted and mated.

4. The injection fixture according to claim 3, characterized in that, One of the first positioning structure and the second positioning structure includes a protrusion, and the other includes a sliding groove that is slidably engaged with the protrusion; The injection fixture includes a first fastener for connecting the isolation box and the clamping assembly after the protrusion is positioned in the groove.

5. The injection fixture according to claim 2, characterized in that, Each of the mounting positions includes a plurality of first positioning structures, which are symmetrically arranged with respect to the center of the mounting position. The number of second positioning structures is the same as the number of first positioning structures, and the second positioning structures correspond one-to-one with the first positioning structures.

6. The injection fixture according to claim 5, characterized in that, The injection fixture includes a second fastener. Among the multiple first positioning structures corresponding to each mounting position, some of the first positioning structures are threadedly connected to the second positioning structure through the first fastener, while the remaining first positioning structures are plugged into the second positioning structure through the second fastener.

7. The injection fixture according to claim 1, characterized in that, The clamping assembly includes a first jaw, a second jaw, and a first locking member. The first jaw and the second jaw are slidable relative to each other in a first direction to clamp the battery from the first direction. The first locking member is used to lock the first jaw and the second jaw to limit the relative sliding of the first jaw and the second jaw.

8. The injection fixture according to claim 1, characterized in that, The clamping assembly further includes: a third jaw, a fourth jaw, and a plurality of second locking members, wherein the third jaw and the fourth jaw slide relative to each other in a second direction to clamp the battery from the second direction, and the second locking members are used to lock the third jaw and the fourth jaw to limit the relative sliding of the third jaw and the fourth jaw; The second direction is perpendicular to the first direction.

9. The injection fixture according to claim 8, characterized in that, The third or fourth gripper has a clearance groove for avoiding the battery's tabs.

10. The injection fixture according to claim 1, characterized in that, The clamping assembly further includes a fifth gripper and a third locking member. The fifth gripper is slidable along a third direction and is used to support the bottom of the battery. The third locking member is used to lock the fifth gripper to limit the sliding of the fifth gripper along the third direction.

11. A liquid injection device, characterized in that, It includes an installation platform and an injection fixture as described in any one of claims 1-9, wherein a plurality of the injection fixtures are detachably mounted on the installation platform around a rotation axis of the installation platform.

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