Liquid injection clamp for battery

Abstract

The utility model provides a liquid injection clamp for a battery, which relates to the technical field of battery processing, and comprises a shell, a liquid injection device, a liquid injection device and a liquid injection device, part of the pressurizing assembly is arranged in the containing cavity, the pressurizing assembly is connected with the shell, and the pressurizing assembly is movably arranged relative to the shell in the preset direction; wherein the pressurizing assembly is provided with a side wall close to part of the shell in the preset direction and a limiting position for limiting the battery to be filled with liquid, and the pressurizing assembly is provided with a side wall far away from part of the shell and a releasing position for releasing the battery to be filled with liquid. The to-be-injected battery is limited through the pressurizing assembly and part of the side wall of the shell, the pressure applied to the to-be-injected battery is conveniently adjusted, battery deformation or damage in the injection process can be effectively avoided in the injection process, and the problem that the battery injection effect is poor in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of battery processing technology, and more specifically, to a liquid injection clamp for batteries. Background Technology

[0002] With the continuous advancement of science and technology, the demand for clean energy is constantly increasing. Lithium-ion batteries, due to their high energy density and lack of environmental pollution, are increasingly widely used in various aspects of life (including small electronic products, information transmission, and transportation and logistics). To further promote the use of lithium-ion batteries and improve battery safety, small-scale battery production experiments are essential. During battery production experiments, the cost and efficiency of electrolyte injection are crucial. Abnormalities in manual electrolyte injection can easily lead to battery swelling and deformation, posing a risk of explosion.

[0003] Currently, the number of batteries produced in the experiment is small, but there are multiple models. Therefore, for small batches of batteries, manual electrolyte injection is far more efficient than replacing the electrolyte injection machine, and manual injection also consumes less material than using an injection device. However, in the experiment, the manual electrolyte injection method basically involves directly injecting the electrolyte into the battery through the injection port using a syringe, which has the following problems:

[0004] 1) Pressure cannot be adjusted during manual injection;

[0005] 2) Air may be injected into the battery, causing the electrolyte already injected into the battery to spray out from the injection hole, or causing the battery casing to bulge and deform irreversibly (making it impossible to carry out subsequent processes and causing the battery to be scrapped);

[0006] 3) The risk of injury to operators due to excessive manual operation.

[0007] There is currently no effective solution to the above problems. Utility Model Content

[0008] The main objective of this invention is to provide a liquid injection clamp for batteries to solve the problem of poor liquid injection effect in existing technologies.

[0009] To achieve the above objectives, according to one aspect of the present invention, a liquid injection clamp for a battery is provided, comprising: a housing having a receiving cavity; a pressurizing assembly, a portion of which is disposed within the receiving cavity, the pressurizing assembly being connected to the housing, and the pressurizing assembly being movably disposed relative to the housing along a predetermined direction; wherein the pressurizing assembly has a limiting position close to a side wall of a portion of the housing along the predetermined direction for limiting the battery to be injected, and a releasing position away from a side wall of the housing for releasing the battery to be injected.

[0010] Furthermore, a clearance portion is provided on one of the side walls of the housing, and the pressurizing assembly includes: a pressure rod, which passes through the clearance portion and whose axial direction is parallel to a preset direction; and a pressure plate, which is connected to the pressure rod. When the pressurizing assembly is in the limiting position, a limiting space is formed between the pressure plate and part of the side wall of the housing. The pressure rod is operated to switch the pressure plate between the limiting position and the release position.

[0011] Furthermore, at least one side wall of the housing is provided with a slide rail, and the pressure plate is slidably disposed along the length of the slide rail.

[0012] Furthermore, the pressure plate includes: a pressure plate body, which is detachably connected to the pressure rod; and a slider, at least one slider, each slider being connected to the pressure plate body, and the slider being slidably arranged along the length direction of the slide rail.

[0013] Furthermore, the clearance part is a threaded hole, and the pressure rod is provided with an external thread that mates with the clearance part.

[0014] Furthermore, the pressure bar is telescopically adjustable along a preset direction.

[0015] Furthermore, the pressurization assembly includes a power source, the output end of which is connected to the end of the pressure rod away from the pressure plate.

[0016] Furthermore, the receiving cavity has an opening, and at least one side of the opening is provided with a scale line.

[0017] Furthermore, the liquid injection clamp for the battery also includes: a pad, at least one pad, at least one pad being detachably disposed within the receiving cavity to change the height of the receiving space inside the receiving cavity, wherein the receiving space is used to place the battery to be injected.

[0018] Furthermore, the shell is made of polytetrafluoroethylene, polyimide, polycarbonate, epoxy resin, or rubber.

[0019] By applying the technical solution of this utility model, the battery to be injected is placed in the receiving cavity, and the pressurizing component is moved to the limiting position. The battery to be injected is limited by the pressurizing component and part of the side wall of the shell, which facilitates the adjustment of the pressure applied to the battery to be injected. This can effectively avoid battery deformation or damage during the injection process, improve the yield of battery injection, and solve the problem of poor battery injection effect in the prior art. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of an embodiment of a liquid injection clamp for batteries according to the present invention is shown;

[0022] Figure 2 A structural schematic diagram of an embodiment of the housing according to the present invention is shown;

[0023] Figure 3 A structural schematic diagram of an embodiment of the pressure bar according to the present invention is shown;

[0024] Figure 4 A structural schematic diagram of an embodiment of the pressure plate according to the present invention is shown.

[0025] The above figures include the following reference numerals:

[0026] 10. Housing; 11. Receiving cavity; 12. Clearance section; 13. Slide rail;

[0027] 20. Pressurizing component; 21. Pressure rod; 22. Pressure plate; 220. Pressure plate body; 2201. Connecting hole; 221. Slider. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0032] Combination Figures 1 to 4 As shown, according to a specific embodiment of the present invention, a liquid injection clamp for batteries is provided.

[0033] Specifically, the liquid injection clamp for the battery includes a housing 10 and a pressurizing assembly 20. The housing 10 has a receiving cavity 11. A portion of the pressurizing assembly 20 is disposed within the receiving cavity 11. The pressurizing assembly 20 is connected to the housing 10 and is movably disposed relative to the housing 10 along a preset direction. The pressurizing assembly 20 has a limiting position that is close to a portion of the housing 10 along the preset direction to limit the liquid injection of the battery, and a releasing position that is away from a portion of the housing 10 to release the liquid injection of the battery.

[0034] Combination Figure 1 As shown, in this embodiment, the housing 10 has a receiving cavity 11 for placing the battery to be injected with electrolyte. The pressurizing component 20 is partially located inside the receiving cavity 11, connected to the housing 10, and can move relative to the housing 10 along a preset direction. This design allows the pressurizing component 20 to adjust its position as needed to accommodate batteries of different sizes for electrolyte injection. Specifically, the preset direction can be, but is not limited to, the length direction of the housing 10. Specifically, the pressurizing component 20 has a limiting position and a releasing position. In the limiting position, the pressurizing component 20 is close to the side wall of the housing 10, thereby limiting (and pressurizing) the battery placed in the receiving cavity 11 to ensure stability of the battery during the electrolyte injection process and prevent displacement of the battery during electrolyte injection, which could lead to uneven electrolyte injection or electrolyte overflow. In the releasing position, the pressurizing component 20 is away from the side wall of the housing 10. At this time, the battery is not limited, facilitating battery placement and removal, and improving operational convenience and efficiency in the production process. This design not only effectively reduces bulging and deformation during battery electrolyte filling, thus lowering the battery failure rate, but also ensures safety during the filling process, avoiding the risks posed by electrolyte splashing. Furthermore, by establishing an adjustable connection between the pressurizing component 20 and the housing 10, this electrolyte filling clamp can accommodate various battery models, improving the tool's versatility and practicality.

[0035] In one exemplary embodiment of this application, an insulating layer is provided on the inner wall of the housing 10 to prevent short circuit between the battery and the clamp.

[0036] Furthermore, a clearance portion 12 is provided on one side wall of the housing 10. The pressurizing assembly 20 includes a pressure rod 21 and a pressure plate 22. The pressure rod 21 passes through the clearance portion 12, and the axial direction of the pressure rod 21 is parallel to a preset direction. The pressure rod 21 is connected to the pressure plate 22. When the pressurizing assembly 20 is in the limiting position, a limiting space is formed between the pressure plate 22 and part of the side wall of the housing 10. The pressure rod 21 is operated to switch the pressure plate 22 between the limiting position and the release position.

[0037] Combination Figure 1 , Figure 3 and Figure 4 As shown, the pressure rod 21 serves as a bridge for power transmission, with one end penetrating the interior of the clearance section 12 and the other end connected to the pressure plate 22. Through this connection, when the operator pushes or pulls the pressure rod 21 in a preset direction, the pressure plate 22 will move accordingly. In the limiting position, the pressure plate 22 is close to the side wall of the housing 10. At this time, the limiting space formed between the pressure plate 22 and the side wall of the housing 10 can effectively fix the battery to be injected, ensuring that the battery will not move or deform during the injection process. In the released position, the pressure plate 22 is away from the side wall of the housing 10. At this time, the placement or removal of the battery is no longer restricted, and the operator can easily put or take out the battery into or out of the receiving cavity 11, greatly improving work efficiency and operational convenience. This design not only simplifies the battery preparation before injection and the battery handling process after injection, but also reduces potential damage to the battery during operation, improving overall production efficiency and battery yield.

[0038] In this embodiment, the clearance part 12 can be configured as a through hole, threaded hole, groove, or other structure, as long as it ensures that the pressure rod 21 can pass through smoothly, thereby achieving efficient movement of the pressurizing assembly 20. The design of the clearance part 12 not only provides a movement path for the pressure rod 21, but also ensures that the axial direction of the pressure rod 21 remains parallel to the preset direction when the pressurizing assembly 20 is in motion, thus guaranteeing the accuracy and consistency of the pressurization process. By providing the clearance part 12 in the housing 10, and through the synergistic effect of the pressure rod 21 and the pressure plate 22 in the pressurizing assembly 20, this liquid injection clamp achieves precise positioning and convenient release of the battery to be injected, effectively solving the problems existing in the traditional manual liquid injection process and improving the controllability and safety of the liquid injection process.

[0039] Furthermore, at least one side wall of the housing 10 is provided with a slide rail 13, and the pressure plate 22 is slidably disposed along the length of the slide rail 13. This configuration provides a more stable and precise guiding mechanism for the pressure plate 22. The ability of the pressure plate 22 to slide along the length of the slide rail 13 ensures that its movement trajectory is stable and controllable during pressurization or release, preventing offset or shaking of the pressure plate 22 during operation, thereby improving the positioning accuracy and operational safety during battery filling.

[0040] Combination Figure 1 and Figure 2 As shown, the slide rail 13 ensures smoother and more precise switching between the limit position and the release position of the pressure plate 22, avoiding any unnecessary force during pressurization and reducing potential damage to the battery. It also allows the operator to intuitively control the movement distance of the pressure plate 22, ensuring that each pressurization achieves the expected effect and improving the consistency and efficiency of the injection process. The design of the slide rail 13 also facilitates daily maintenance and inspection, ensuring the long-term stable operation of the pressurization assembly 20 and reducing maintenance costs.

[0041] Furthermore, the slider guide rail is equipped with positioning pins to fix the position of the pressure plate 22 during pressurization. The positioning pin design ensures the stability of the pressure plate 22 during pressurization, avoids uneven pressurization caused by the movement of the pressure plate 22, and improves the accuracy and consistency of battery electrolyte injection.

[0042] Furthermore, the pressure plate 22 includes a pressure plate body 220 and sliders 221. The pressure plate body 220 is detachably connected to the pressure rod 21. There is at least one slider 221, and each slider 221 is connected to the pressure plate body 220. The sliders 221 are slidably arranged along the length of the slide rail 13. In this embodiment, the pressure plate body 220 and the pressure rod 21 are detachably connected. This design allows the pressure plate body 220 to be easily disassembled and reassembled when damaged or needing replacement, reducing maintenance costs and downtime. It also facilitates the adjustment of the pressure plate body 220 according to different battery models and sizes, improving the versatility and adaptability of the equipment. The number of sliders 221 can be adjusted according to the size of the housing 10 and the pressure requirements. Multiple sliders 221 can ensure the stability of the pressure plate 22 during the sliding process. Even under high pressure, the pressure plate 22 can maintain smooth movement, avoiding excessive or uneven pressure on the battery, thereby reducing the risk of cell deformation or electrolyte leakage.

[0043] Combination Figure 3 and Figure 4As shown, in this embodiment, the pressure plate body 220 is provided with a connecting hole 2201, which is a threaded hole. The pressure rod 21 is provided with an external thread that mates with the threaded hole, thereby realizing a detachable connection between the pressure plate body 220 and the pressure rod 21. This arrangement facilitates equipment storage and maintenance, reduces costs, and improves production efficiency. The main function of the slide rail 13 is to guide the smooth movement of the slider 221 during the pressurization process, preventing the slider 221 from deviating and ensuring the uniformity of pressurization. The slide rail 13 has a self-lubricating function, reducing friction between the slide rail 13 and the slider 221 and extending the service life of the equipment.

[0044] Furthermore, the clearance portion 12 is a threaded hole, and the pressure rod 21 is provided with an external thread that mates with the clearance portion 12. This design allows the pressure rod 21 to be rotatably connected to the clearance portion 12 of the housing 10 via a threaded connection, thereby converting the rotational motion of the pressure rod 21 into the linear motion of the pressure plate 22.

[0045] In this embodiment, by rotating the pressure rod 21, the threaded engagement between its external thread and the clearance part 12 (threaded hole) allows the pressure rod 21 to move axially, thereby driving the pressure plate 22 to move along the length of the slide rail 13. This transmission method has a self-locking characteristic; even after rotation stops, the pressure rod 21 can remain in its current position, achieving stable limiting of the pressure plate 22 without the need for an additional locking device, thus improving the reliability and safety of the equipment. Furthermore, the engagement between the threaded hole and the external thread makes the connection between the pressure rod 21 and the housing 10 more robust, reducing errors caused by structural loosening during pressurization, ensuring accurate application of pressure to the battery each time, improving electrolyte injection accuracy and battery yield. The threaded design also facilitates the replacement and maintenance of the pressure rod 21. When the pressure rod 21 is worn or damaged, the operator can easily remove it from the threaded hole by a simple rotation action and replace it with a new pressure rod 21, greatly simplifying the maintenance process, reducing downtime, and improving production efficiency.

[0046] In another embodiment of this application, the pressure rod 21 is telescopically oriented along a preset direction. The telescopic pressure rod 21 can be designed in various ways, such as using a sleeve structure, where one tube is nested inside another, and the telescopic movement of the inner and outer tubes achieves the extension and retraction of the pressure rod 21. This structure is simple and reliable, the extension and retraction process is smooth, and it is easy to operate. The telescopic mechanism of the pressure rod 21 can also cooperate with the sliding of the pressure plate 22 to ensure that the pressure plate 22 can smoothly and accurately approach the battery during pressurization, providing uniform pressure. When releasing pressure, the pressure rod 21 retracts, and the pressure plate 22 slides along the slide rail 13 to the release position, facilitating battery removal and replacement, and improving the continuity and efficiency of the production process.

[0047] Furthermore, the telescopic pressure rod 21 can also integrate a pressure sensor to monitor the pressure value during the pressurization process in real time. By comparing it with a preset pressure range, the extension and retraction of the pressure rod 21 are automatically adjusted to achieve intelligent pressurization, further improving the injection accuracy and battery quality. Designing the pressure rod 21 as a telescopic structure not only enhances the adaptability and operability of the injection clamp but also provides more precise pressure control, significantly promoting the efficiency and safety of the battery injection process. This represents a technological innovation of significant value.

[0048] Furthermore, the pressurizing assembly 20 includes a power source, the output end of which is connected to the end of the pressure rod 21 away from the pressure plate 22. In this embodiment, the power source can be selected according to the actual application scenario and requirements. It can be manually operated (such as a knob, handle, etc.) or electric or pneumatic (such as an electric motor, cylinder, etc.), providing stable and controllable power for the movement of the pressure rod 21.

[0049] In one embodiment of this application, the power source is manually operated, such as a knob or handle. By rotating or pushing these components, force can be transmitted to the pressure rod 21, thereby moving the pressure plate 22. This design ensures ease of operation while allowing the operator to adjust the pressure according to the actual condition of the battery, making it suitable for battery electrolyte filling processes in small batches or laboratory environments.

[0050] In one embodiment of this application, the power source is electric or pneumatic, such as an electric motor or cylinder. This provides more stable and precise power for the movement of the pressure rod 21, making it particularly suitable for automated pressurization on a production line, improving the efficiency and consistency of the liquid injection process. The power source can be connected to a control system to automatically adjust the pressurization action of the pressure rod 21 according to a preset pressure value or a feedback signal from the battery, achieving intelligent pressure control.

[0051] Furthermore, the receiving cavity 11 has an opening 110, and at least one side of the opening 110 is provided with a scale line. This arrangement allows the operator to precisely adjust the pressure according to the battery model and liquid injection requirements, avoiding battery damage caused by improper pressurization and improving production efficiency and battery quality.

[0052] Preferably, the length direction of the scale lines is set along a preset direction, which is the length direction of the housing 10. This design allows operators of the battery electrolyte filling production line to adjust the pressure more flexibly, meeting the electrolyte filling requirements of batteries of different models and sizes. It improves the adaptability and flexibility of the production line, and is particularly suitable for fine-tuning and optimizing the battery electrolyte filling process, providing more precise and personalized control methods for battery production.

[0053] Furthermore, the liquid injection clamp for the battery also includes a pad, at least one pad, which is detachably disposed within the receiving cavity 11 to change the height of the receiving space inside the receiving cavity 11, wherein the receiving space is used to place the battery to be injected.

[0054] In this embodiment, at least one pad is used, but multiple pads can be provided as needed. These pads are detachably installed inside the receiving cavity 11. By increasing or decreasing the number of pads or adjusting their positions, the height of the internal receiving space of the receiving cavity 11 can be flexibly changed to match batteries of different models or sizes. The design of the pads takes into account compatibility and stability with the receiving cavity 11. The shape and size of each pad should ensure that it can be firmly placed inside the receiving cavity 11 while providing sufficient support area to prevent the battery from shifting or deforming during pressurization. Furthermore, the pads can be firmly connected to the bottom or side wall of the receiving cavity 11 by magnetic attraction, snaps, or other fasteners to ensure that the pads will not move or fall off during the liquid injection process, affecting the battery positioning and liquid injection effect.

[0055] Furthermore, the pad is made of a non-conductive material. This design effectively prevents short circuits caused by the pad's conductivity during electrolyte filling, thus improving production safety. It is suitable for various battery production environments requiring high-pressure electrolyte filling, such as lithium-ion and sodium-ion batteries. Using a non-conductive pad not only reduces safety hazards during production but also improves the consistency and stability of battery electrolyte filling, ensuring battery performance under high-pressure electrolyte filling conditions.

[0056] Furthermore, the housing 10 is made of polytetrafluoroethylene, polyimide, polycarbonate, epoxy resin, or rubber. This design ensures the stability and safety of the liquid injection clamp during the battery liquid injection process, while allowing for the selection of the most suitable material based on different usage environments and cost considerations to achieve optimal performance and economic benefits.

[0057] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0058] 1) Improved electrolyte injection accuracy and battery safety: By using an electrolyte injection clamp with a pressurizing function, air inside the cell can be effectively removed during the electrolyte injection process, avoiding excessive internal pressure and cell bulging and deformation caused by the mixing of electrolyte and air. This improves the electrolyte injection accuracy, reduces the risk of battery bulging and explosion, and enhances battery safety.

[0059] 2) Improve production efficiency and reduce production costs: Compared with direct manual liquid injection, using this liquid injection fixture can control the internal pressure while injecting liquid, reduce electrolyte waste and battery scrap rate, speed up the liquid injection process, and reduce production energy consumption, thereby improving overall production efficiency and reducing production costs.

[0060] 3) Enhance the adaptability and versatility of the equipment: The adjustable design of the pressure plate 22 enables the liquid injection clamp to adapt to different models and sizes of batteries, avoiding the need to frequently change the liquid injection equipment due to changes in battery models, thus enhancing the adaptability and versatility of the equipment.

[0061] 4) Improved ease of operation and reliability: The connection between the pressure rod 21 and the power source simplifies the operation process. The operator only needs to control the power source to apply pressure, without directly acting on the pressure plate 22, thus improving the ease of operation and reliability. At the same time, the threaded connection and slide rail auxiliary design ensure the smooth movement of the pressure rod 21 and the pressure plate 22 and the accuracy of positioning.

[0062] 5) Potential for intelligence and automation: The integration of power source and pressure sensor provides a foundation for the intelligence and automation of the equipment. By combining with the control system, automated pressure control can be achieved, further improving the automation level of the injection process and the stability of production quality.

[0063] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0064] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this utility model.

[0065] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0066] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liquid injection jig for a battery, characterized by comprising: The utility model relates to a kind of liquid injection clamps for battery, including: Shell (10), the shell (10) has accommodating cavity (11); Pressurizing assembly (20), part of the pressurizing assembly (20) is arranged in the accommodating cavity (11), the pressurizing assembly (20) is connected with the shell (10), the pressurizing assembly (20) is movably arranged relative to the shell (10) along preset direction; Wherein, the pressurizing assembly (20) has the side wall of part of the shell (10) in the direction of approaching, to limit the position of the battery to be injected with limiting, and the pressurizing assembly (20) has the side wall of part of the shell (10) in the direction of away, to release the release position of the battery to be injected.

2. The liquid injection jig for a battery according to claim 1, wherein One of the side walls of the shell (10) is provided with a relief portion (12), and the pressurizing assembly (20) includes: Pressing rod (21), the pressing rod (21) is provided in the relief portion (12), and the axial direction of the pressing rod (21) is parallel to the preset direction; Pressing plate (22), the pressing rod (21) is connected with the pressing plate (22), and when the pressurizing assembly (20) is located in the limiting position, the pressing plate (22) and part of the side wall of the shell (10) form a limiting space; Wherein, the pressing rod (21) is operated to switch the pressing plate (22) between the limiting position and the release position.

3. The liquid injection jig for a battery according to claim 2, wherein At least one side wall of the shell (10) is provided with a slide rail (13), and the pressing plate (22) is slidably arranged along the length direction of the slide rail (13).

4. The liquid injection jig for a battery according to claim 3, wherein The pressing plate (22) includes: Pressing plate body (220), the pressing plate body (220) is detachably connected with the pressing rod (21); Slide block (221), the slide block (221) is at least one, each slide block (221) is connected with the pressing plate body (220), and the slide block (221) is slidably arranged along the length direction of the slide rail (13).

5. The liquid injection jig for a battery according to claim 2, wherein The relief portion (12) is a threaded hole, and the pressing rod (21) is provided with an external thread matched with the relief portion (12).

6. The liquid injection jig for a battery according to claim 2, wherein The pressing rod (21) is telescopically arranged along the preset direction.

7. The liquid injection jig for a battery according to any one of claims 2, 5 and 6, wherein The pressurizing assembly (20) includes: Power source, the output end of the power source is connected with one end of the pressing rod (21) away from the pressing plate (22).

8. The liquid injection jig for a battery according to claim 1, wherein The accommodating cavity (11) has an opening (110), and at least one side of the opening (110) is provided with a scale line.

9. The liquid injection jig for a battery according to claim 1, wherein The liquid injection clamp for battery further includes: Packing block, the packing block is at least one, and at least one packing block is detachably arranged in the accommodating cavity (11) to change the height of the accommodating space inside the accommodating cavity (11), wherein the accommodating space is used for placing the battery to be injected.

10. The liquid injection jig for a battery according to claim 1, wherein The shell (10) is made of polytetrafluoroethylene, polyimide, polycarbonate, epoxy resin or rubber.

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