Battery electrolyte injection fixtures and battery production lines

Abstract

This application relates to the field of battery production equipment technology, and discloses a battery electrolyte injection fixture and a battery production line. The battery electrolyte injection fixture includes a driving device, a first clamping part, and a second clamping part. The driving device is drivenly connected to the first and second clamping parts. The first clamping part has a first clamping surface, and the second clamping part has a second clamping surface. The first and second clamping surfaces are disposed opposite to each other. The first clamping surface is a curved surface convex towards the second clamping surface. When the driving device drives the first and second clamping parts to clamp the battery cell, the battery cell has a first sidewall and a second sidewall along a first direction. The first clamping surface corresponds to the first sidewall, and the second clamping surface corresponds to the second sidewall. At least a portion of the first sidewall is intermittently abutted by the corresponding portion of the first clamping surface. The purpose of this technical solution is to improve the uniformity of electrolyte wetting inside the battery cell, shorten the wetting time, and improve the overall battery performance.

Description

Technical Field

[0001] This application belongs to the field of battery production equipment technology, and in particular relates to a battery liquid injection fixture and a battery production line. Background Technology

[0002] In battery manufacturing, electrolyte wetting is a crucial step in ensuring stable battery performance. This is especially true for the electrolyte injection process in pouch or prismatic batteries, where the uniformity of electrolyte wetting of the electrode components directly affects the battery's cycle life and performance. Common techniques in this field involve prolonged static placement after electrolyte injection or applying low-frequency oscillations to promote electrolyte diffusion throughout the electrode components.

[0003] However, due to the structural characteristics of individual battery cells, the internal space of the casing is mainly composed of multi-layered electrodes, forming a highly dense microporous structure between the electrodes. After injection, the electrolyte, under the influence of gravity, preferentially flows along the gap between the edge of the electrode assembly and the inner wall of the casing, and then slowly wets the central region of the electrode assembly. This makes it difficult for the electrolyte to effectively penetrate into the central region of the electrode assembly, resulting in insufficient wetting in this area. This phenomenon stems from the dense structure's obstruction of the electrolyte diffusion path, making the wetting process in the central region of the electrode assembly extremely slow and insufficient. Consequently, it causes localized electrolyte deficiency (i.e., insufficient wetting in the central region of the electrode assembly), leading to performance defects such as increased internal resistance and capacity decay. Utility Model Content

[0004] The purpose of this application is to provide a battery electrolyte injection fixture and a battery production line, which aims to improve the uniformity of electrolyte wetting inside the battery cell, shorten the wetting time, and improve the overall performance of the battery.

[0005] To achieve the above objectives, according to a first aspect of the embodiments of this application, a battery liquid injection clamp is provided, including a driving device, a first clamping part, and a second clamping part. The driving device is drivenly connected to the first clamping part and the second clamping part. The first clamping part has a first clamping surface, and the second clamping part has a second clamping surface. The first clamping surface and the second clamping surface are disposed opposite to each other. The first clamping surface is configured as a curved surface protruding toward the second clamping surface. When the driving device drives the first clamping part and the second clamping part to clamp a battery cell, the battery cell has a first sidewall and a second sidewall along a first direction. The first clamping surface corresponds to the first sidewall, and the second clamping surface corresponds to the second sidewall. At least a portion of the first sidewall is intermittently abutted by the corresponding portion of the first clamping surface.

[0006] The battery electrolyte injection fixture provided in this application achieves a breathing clamping process by intermittently contacting the battery cell with the drive device, the first clamping part, and the second clamping part, thereby generating directional pressure changes to promote the diffusion of electrolyte to difficult-to-wet areas. This can improve the uniformity of electrolyte wetting inside the battery cell, shorten the wetting time, and improve the overall performance of the battery.

[0007] In some embodiments, the second clamping surface is configured as a curved surface convex toward the first clamping surface, and at least a portion of the second sidewall is intermittently abutted by the corresponding portion of the second clamping surface. The second clamping surface cooperates with the first clamping surface to achieve bilateral breathing clamping on the two opposite sidewalls of the battery cell. This bilateral curved surface intermittent abutment structure and working method can improve the liquid injection efficiency and product consistency of the battery cell.

[0008] In some embodiments, the driving device includes a first driving unit, which is drivenly connected to a first clamping unit and a second clamping unit. The first driving unit drives the first clamping unit and the second clamping unit to move closer to each other or further away from each other, and the first driving unit drives the first clamping unit and the second clamping unit to intermittently abut against the battery cell. This allows the battery cell to undergo controlled periodic compression and relaxation during electrolyte injection, significantly promoting the penetration and diffusion of electrolyte within the electrode assembly. This effectively improves the wetting degree in the central region of the electrode assembly, helps to improve the wetting efficiency and uniformity of the electrolyte, thereby improving battery performance and lifespan.

[0009] In some embodiments, the highest point of the protrusion of the first clamping surface abuts against the midpoint of the first sidewall; and / or, the highest point of the protrusion of the second clamping surface abuts against the midpoint of the second sidewall.

[0010] In some embodiments, the driving device includes a first driving part and a second driving part; the first driving part is driven to a first clamping part and a second clamping part, and the first driving part drives the first clamping part and the second clamping part to move closer to each other or further away from each other to clamp or release the battery cell; the second driving part is driven to a first clamping part, and the second driving part drives the first clamping part to reciprocate along a second direction on a first sidewall; and / or, the second driving part is driven to a second clamping part, and the second driving part drives the second clamping part to reciprocate along a second direction on a second sidewall; wherein the second direction is perpendicular to the first direction. The technical solution of this embodiment enables the clamping surface to perform localized dynamic kneading of the battery cell, which can more effectively promote the diffusion and penetration of the electrolyte inside the battery cell, significantly improving the electrolyte wetting speed and uniformity, and enhancing the quality and efficiency of battery electrolyte injection.

[0011] In some embodiments, the driving device includes a first driving part and a third driving part; the first driving part is driven to a first clamping part and a second clamping part, and the first driving part drives the first clamping part and the second clamping part to move closer to each other or further away from each other to clamp or release the battery cell; the third driving part is driven to a first clamping part, and the third driving part drives the first clamping part to move so that the first clamping surface reciprocates along the first sidewall; and / or, the third driving part is driven to a second clamping part, and the third driving part drives the second clamping part to move so that the second clamping surface reciprocates along the second sidewall. This rolling and squeezing action can generate dynamic local pressure changes, effectively promoting the flow and penetration of electrolyte inside the battery cell, and helping to remove trapped air bubbles, significantly improving the uniformity and efficiency of electrolyte wetting, thereby improving the production quality and performance stability of the battery.

[0012] In some embodiments, the first clamping surface and / or the second clamping surface are configured as spherical cap surfaces formed by rotating a first generatrix around a first guideline, which facilitates the application of high pressure to a localized small area of ​​the battery cell during the breathing clamping process, thereby more effectively squeezing out the gas inside the battery and promoting electrolyte penetration; or, the first clamping surface and / or the second clamping surface are configured as arc surfaces formed by moving a second generatrix linearly along a second guideline, which can apply pressure to a specific linear area of ​​the battery cell during the breathing clamping process, helping to guide the electrolyte to wet along a specific path.

[0013] In some embodiments, the radius of curvature of the first clamping surface is R1, the length of the first sidewall is L1, and the width is L2, wherein L1 ≥ L2, and 5*L1 ≤ R1 ≤ 10*L1; and / or, the radius of curvature of the second clamping surface is R2, the length of the second sidewall is H1, and the width is H2, wherein H1 ≥ H2, and 5*H1 ≤ R2 ≤ 10*H1. Thus, when the clamping surface contacts the battery cell, sufficient local pressure is generated to promote the "breathing" effect, while stress concentration is avoided due to excessively small curvature, thereby preventing damage to the battery cell 100.

[0014] In some embodiments, the battery electrolyte injection fixture further includes a pressure detection unit electrically connected to the drive device. The pressure detection unit includes a pressure sensor, and both the first clamping part and the second clamping part are equipped with pressure sensors. The pressure sensors are used to detect the clamping force of the first clamping part and the second clamping part on the battery cell. Based on the real-time feedback of the clamping force from the pressure detection unit, the drive device can make dynamic adjustments to ensure that the clamping force is always within the optimal range. This precise clamping force control optimizes the wetting effect of the electrolyte inside the battery cell, improves the uniformity and efficiency of electrolyte injection, and helps to improve the production quality and performance consistency of the battery cells.

[0015] In some embodiments, the battery electrolyte injection fixture further includes a wetting detection structure for detecting the degree to which any region inside the battery cell is wetted by the electrolyte. The wetting detection structure is electrically connected to the drive device. The wetting detection structure can detect the degree of electrolyte wetting inside the battery cell in real time or near real time, identify areas that are difficult to wet, and then apply additional mechanical action to these areas, thereby significantly promoting the penetration and diffusion of the electrolyte in these areas and ensuring sufficient and uniform wetting of the electrolyte inside the battery cell.

[0016] In some embodiments, the wetting detection structure includes an ultrasonic transmitter, an optical microphone, and a feedback control component. The ultrasonic transmitter and the optical microphone are respectively located on opposite sides of the battery cell. The ultrasonic transmitter emits ultrasonic waves into the battery cell, and the feedback control component is electrically connected to the optical microphone and the driving device. Applying this technical solution, the degree of electrolyte wetting inside the battery cell can be detected in real-time or near real-time, and difficult-to-wet areas can be identified. Then, additional mechanical action is applied to these difficult-to-wet areas, significantly promoting the penetration and diffusion of the electrolyte in these areas, ensuring sufficient and uniform wetting of the electrolyte inside the battery cell.

[0017] According to a second aspect of the embodiments of this application, a battery production line is provided. The battery production line includes the battery electrolyte injection fixture as described above. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a battery cell for which the battery liquid injection clamp is designed according to an embodiment of this application;

[0020] Figure 2 for Figure 1 A schematic diagram of the exploded battery cell is shown.

[0021] Figure 3 This is a schematic diagram of the structure of the battery liquid filling clamp according to an embodiment of this application, showing the first clamping part and the second clamping part being arranged opposite to each other;

[0022] Figure 4 This is a perspective view of one embodiment of the first clamping part / second clamping part of the battery filling clamp according to an embodiment of this application;

[0023] Figure 5 for Figure 4A side view of the first clamping part / second clamping part along the S1 / S2 direction is shown;

[0024] Figure 6 for Figure 4 Cross-sectional view along the AA direction;

[0025] Figure 7 This is a perspective view of another embodiment of the first clamping part / second clamping part of the battery filling clamp according to an embodiment of this application;

[0026] Figure 8 for Figure 7 A side view of the first clamping part / second clamping part along the S4 direction is shown;

[0027] Figure 9 for Figure 7 A side view of the first clamping part / second clamping part along the S3 direction is shown;

[0028] Figure 10 This is a schematic diagram illustrating the breathing-type clamping process of the first and second clamping parts of the battery filling clamp according to an embodiment of this application for a single battery cell. Figure 1 In the figure, the double arrows indicate the left and right reciprocating movement directions of the first clamping part and the second clamping part;

[0029] Figure 11 This is a schematic diagram illustrating the breathing-type clamping process of the first and second clamping parts of the battery filling clamp according to an embodiment of this application for a single battery cell. Figure 2 In the figure, the double arrows indicate the left and right reciprocating movement directions of the first clamping part and the second clamping part;

[0030] Figure 12 This is a schematic diagram illustrating another breathing-type clamping process of the first and second clamping parts of the battery filling clamp according to an embodiment of this application for a single battery cell. Figure 1 In the figure, the double arrows indicate the up-and-down reciprocating movement direction of the first clamping part and the second clamping part;

[0031] Figure 13 This is a schematic diagram illustrating another breathing-type clamping process of the first and second clamping parts of the battery filling clamp according to an embodiment of this application for a single battery cell. Figure 2 In the figure, the double arrows indicate the up-and-down reciprocating movement direction of the first clamping part and the second clamping part;

[0032] Figure 14 This is a schematic diagram illustrating another breathing-type clamping process of the first and second clamping parts of the battery filling clamp according to an embodiment of this application for a single battery cell. Figure 1In the figure, the double arrows indicate the reciprocating rolling direction of the first clamping part and the second clamping part;

[0033] Figure 15 This is a schematic diagram illustrating another breathing-type clamping process of the first and second clamping parts of the battery filling clamp according to an embodiment of this application for a single battery cell. Figure 2 The double arrows shown in the figure indicate the reciprocating rolling direction of the first clamping part and the second clamping part.

[0034] The figures in the diagram are labeled as follows:

[0035] 100. Battery cell; 101. First sidewall; 102. Second sidewall; 110. Casing body; 120. End cap; 130. Electrode assembly;

[0036] 10. First clamping part; 11. First clamping surface;

[0037] 20. Second clamping part; 21. Second clamping surface;

[0038] 30. Immersion detection structure; 31. Ultrasonic transmitter; 32. Optical microphone; 33. Feedback control component;

[0039] 40. Pressure detection unit; 41. Pressure sensor;

[0040] 201. First busbar; 202. First guideline; 203. Second busbar; 204. Second guideline. Detailed Implementation

[0041] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0042] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 application according to the specific circumstances.

[0045] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants (battery devices used in these applications are generally referred to as energy storage batteries), but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars (battery devices used in these applications are generally referred to as power batteries). With the continuous expansion of battery device application areas, the market demand is also constantly increasing. Therefore, the increase in market demand necessitates a continuous increase in production capacity, and improving production efficiency is one of the quantifiable indicators for increasing production capacity.

[0046] In related technologies, traditional battery electrolyte filling processes face the technical problem of insufficient wetting in the central region of the electrode assembly. Specifically, due to the structural limitations of the battery cell, the internal space of the casing is mainly occupied by the electrode assembly, with the electrodes forming a dense arrangement. When the electrolyte is injected into the battery cell, under the influence of gravity, the electrolyte preferentially diffuses into the gap between the sides of the electrode assembly and the inner wall of the casing, while the diffusion path to the central region of the electrode assembly is blocked. This results in a significantly lower wetting rate in the central region compared to the side regions. This problem directly causes uneven electrolyte distribution inside the battery, which in turn affects the uniformity of the electrochemical reaction in the electrode assembly, ultimately adversely impacting the overall performance of the battery.

[0047] For example, in the electrolyte injection process of pouch cells or prismatic hard-shell cells, the internal space of the cell's casing is tightly filled with electrode assemblies, which have small gaps between their electrodes. When the electrolyte is injected, it rapidly flows along the gap between the sidewalls of the electrode assemblies and the inner wall of the casing. However, the central region of the electrode assemblies has a dense structure, making it difficult for the electrolyte to penetrate effectively. Related technologies employ static or slight agitation methods: static methods rely solely on natural diffusion mechanisms, which are time-consuming and cannot actively intervene in electrolyte distribution; slight agitation, while producing overall shaking, results in a uniform distribution of vibration energy, failing to apply directional pressure changes to difficult-to-wet areas such as the central region of the electrode assemblies, thus making it difficult to overcome the diffusion barrier of the dense structure. Therefore, the wetting state of the central region of the electrode assemblies cannot be substantially improved, resulting in localized reaction lag in the subsequent formation stages of the cell.

[0048] If the above problems are not addressed, uneven electrolyte distribution within the battery cell will lead to increased local current density differences, resulting in reduced utilization of active materials and exacerbated side reactions. This, in turn, accelerates battery capacity decay and shortens cycle life. Furthermore, insufficiently wetted areas are prone to localized overheating during charging and discharging, increasing the risk of thermal runaway and severely impacting battery reliability.

[0049] Based on the above considerations, embodiments of this application provide a battery electrolyte injection fixture, which is then used in a battery production line to improve production efficiency. The battery electrolyte injection fixture provided in this application achieves a breathing-like clamping process by intermittently contacting the battery cells through a drive device, a first clamping part, and a second clamping part. This generates directional pressure changes that promote the diffusion of electrolyte into difficult-to-wet areas, thereby improving the uniformity of electrolyte wetting within the battery cells, shortening the wetting time, and enhancing the overall battery performance.

[0050] To illustrate the technical solutions provided by the embodiments of this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0051] According to a first aspect of the embodiments of this application, embodiments of this application provide a battery liquid filling clamp. For example... Figures 3 to 15 As shown, the battery filling clamp includes a driving device, a first clamping part 10, and a second clamping part 20. The driving device is driven to the first clamping part 10 and the second clamping part 20. The first clamping part 10 has a first clamping surface 11, and the second clamping part 20 has a second clamping surface 21. The first clamping surface 11 and the second clamping surface 21 are disposed opposite to each other. The first clamping surface 11 is configured as a curved surface protruding towards the second clamping surface 21. When the driving device drives the first clamping part 10 and the second clamping part 20 to clamp the battery cell 100, as... Figure 1 and Figure 2As shown, the battery cell 100 has a first sidewall 101 and a second sidewall 102 along a first direction X. The first clamping surface 11 corresponds to the first sidewall 101, and the second clamping surface 21 corresponds to the second sidewall 102. At least a portion of the first sidewall 101 is intermittently abutted by the corresponding portion of the first clamping surface 11 to achieve a breathing clamping process for the battery cell 100. The first direction X is the thickness direction of the battery cell 100.

[0052] For ease of understanding, the following explains some key terms in this embodiment:

[0053] A battery electrolyte injection fixture is a device used to hold a battery cell 100 and assist in electrolyte wetting during the battery manufacturing process. The main function of the battery electrolyte injection fixture is to promote the uniform distribution and full wetting of the electrolyte inside the battery cell 100 by applying mechanical action after the battery is injected.

[0054] The drive unit provides power and motion control for the first clamping part 10 and the second clamping part 20 of the battery filling clamp. The function of the drive unit is to drive the various moving parts of the clamp (first clamping part 10 and second clamping part 20), enabling the corresponding moving parts to move accurately according to a preset motion pattern, such as clamping, releasing, or applying pressure. For example, the drive unit can employ actuators such as cylinders, hydraulic cylinders, or electric lead screws, controlling their extension or rotation to drive the clamping parts to move.

[0055] The first clamping part 10 and the second clamping part 20 are structures in the battery liquid injection clamp that directly contact the battery cell 100 and apply clamping force to the battery cell 100. They are usually arranged in pairs and are driven in coordination by the drive device to achieve operations such as clamping and fixing the battery cell 100 and applying pressure.

[0056] The first clamping surface 11 is the surface on the first clamping part 10 that directly contacts the battery cell 100, and the second clamping surface 21 is the surface on the second clamping part 20 that directly contacts the battery cell 100. These two clamping surfaces are the interface for force transmission and action between the clamp and the battery cell 100.

[0057] Battery cell 100 refers to an independent battery unit that has not been assembled into a battery device. It is in the semi-finished product stage during the electrolyte filling process. Battery cell 100 contains components such as electrode assembly and electrolyte.

[0058] The first sidewall 101 and the second sidewall 102 are two opposing sidewalls of the battery cell 100. As an example, the first sidewall 101 and the second sidewall 102 are the outer surfaces of the battery cell 100 in the thickness direction (i.e., the first direction X), such as two opposing sidewalls with larger areas of a square battery cell. During the liquid injection process, these surfaces are the main areas where the clamp applies force.

[0059] like Figure 1 and Figure 2 As shown, the first direction X is the thickness direction of the battery cell 100. The first direction X is generally perpendicular to the length (i.e., the second direction Y) and width (i.e., the third direction Z) direction of the battery cell 100, and the first direction X indicates the stacking direction of the electrode sheets in the electrode assembly 130.

[0060] "Breathing clamping process" is a specific clamping method characterized by periodic or intermittent adjustments to the clamping force or clamping position of the battery cell 100. This adjustment mimics the action of "breathing" and aims to promote the flow of electrolyte inside the battery cell 100 through mechanical action to achieve full wetting, especially for the dense areas of the electrode assembly 130.

[0061] The first clamping part 10 and the second clamping part 20 are components that directly act on the two opposite sidewalls of the battery cell 100. The first clamping surface 11 of the first clamping part 10 and the second clamping surface 21 of the second clamping part 20 are designed to be arranged opposite each other so as to clamp the battery cell 100 from the two opposite sidewalls. For example, the first clamping part 10 and the second clamping part 20 can be designed as two parallel plate-like structures, with the first clamping surface 11 and the second clamping surface 21 respectively formed on their inner surfaces. In order to achieve effective action on the battery cell 100, the first clamping surface 11 is set as a curved surface convex towards the second clamping surface 21. This curved surface design makes the contact between the clamping surface and the battery cell 100 not a full surface contact, but rather a local or linear contact area. For example, the first clamping surface 11 can be an arc surface with a specific radius of curvature, or a locally protruding structure. This curved surface design differs from the conventional planar clamping surface, and it changes the distribution of clamping force on the surface of the battery cell 100.

[0062] When the drive device drives the first clamping part 10 and the second clamping part 20 to clamp the battery cell 100, the two clamping surfaces of the clamp (the first clamping surface 11 and the second clamping surface 21) act on the two main surfaces (the first sidewall 101 and the second sidewall 102) of the battery cell 100 along the first direction X, respectively. At least a portion of the first sidewall 101 is intermittently abutted by the corresponding portion of the first clamping surface 11 to achieve a "breathing" clamping process on the battery cell 100. Intermittent abutment means that the clamping force or contact state is not constant, but is applied and released periodically, or switched between different intensities. For example, the drive device can control the first clamping part 10 and the second clamping part 20 to move closer and further away at a preset frequency and amplitude, thereby causing the first clamping surface 11 to apply intermittent pressure to the first sidewall 101. This intermittent action aims to promote the penetration and diffusion of the electrolyte inside the battery cell 100 into the electrode assembly 130 by causing mechanical deformation of the battery cell 100. The breathing-like clamping process can be achieved through program control of the drive device, which periodically relaxes the clamping force after clamping the battery cell 100, and then re-clamps it, forming a dynamic process that mimics "breathing".

[0063] The following is a further explanation through an exemplary embodiment:

[0064] For example, a batch of battery cells 100 that have been injected with electrolyte are subjected to an immersion operation.

[0065] First, the battery cell 100 is transported to the working position of the clamp. The drive mechanism of the clamp is activated, causing the first clamping part 10 and the second clamping part 20 to move closer to the battery cell 100. The first clamping surface 11 of the first clamping part 10 is aligned with the first side wall 101 of the battery cell 100, while the second clamping surface 21 of the second clamping part 20 is aligned with the second side wall 102 of the battery cell 100.

[0066] When the drive device drives the first clamping part 10 and the second clamping part 20 to clamp the battery cell 100, since the first clamping surface 11 is set as a curved surface convex towards the second clamping surface 21, the first clamping surface 11 will not make full surface contact with the first sidewall 101, but only partial area contact. For example, if the first clamping surface 11 is an arc surface, it may form a linear contact area with the first sidewall 101. Subsequently, the drive device enters a breathing clamping working mode, in which the drive device periodically adjusts the distance between the first clamping part 10 and the second clamping part 20. Specifically, the drive device first clamps the battery cell 100 with a preset force, causing the first clamping surface 11 to apply pressure to the first sidewall 101. At this time, the second clamping part 20 acts as an auxiliary structure to apply the clamping pressure from the first clamping part 10. This causes a slight deformation of the battery cell 100 along its thickness direction. This deformation temporarily reduces the gap between the electrode assemblies 130 inside the battery cell 100, forcing the electrolyte to diffuse outwards. Then, the drive device briefly relaxes the clamping force, causing the first clamping part 10 and the second clamping part 20 to move slightly apart, allowing the battery cell 100 to return to its initial shape or partially return to its original shape. This relaxation process causes the compressed gap to increase again, and the electrolyte flows back from all sides, creating an effect of electrolyte being drawn in. Subsequently, the drive device re-clamps and relaxes again, repeating this process cyclically. Through this intermittent clamping and loosening, the battery cell 100 is subjected to periodic mechanical pressure, resulting in periodic and intermittent deformation, mimicking the action of "breathing". This dynamic force helps to overcome the capillary resistance of the electrolyte in the middle region of the electrode assembly 130, and promotes the uniform wetting of the electrolyte throughout the entire electrode assembly 130, especially those dense areas that are originally difficult to wet.

[0067] In conjunction with the above exemplary embodiments, the battery injection clamp provided by the embodiments of this application demonstrates significant technical contributions in solving the problem of uneven electrolyte wetting in the battery cell 100. In this battery injection clamp, the outwardly convex curved surface design allows the clamping force to be concentrated on a local area of ​​the battery cell 100, forming a higher local pressure. Furthermore, the breathing clamping process ensures that the mechanical action on the battery cell 100 is no longer static or singular, but rather that the electrolyte inside the battery cell 100 is repeatedly compressed and expanded through periodic clamping and releasing, promoting electrolyte flow and creating conditions for electrolyte redistribution and absorption. This effectively compresses the battery cell 100, prompting the electrolyte to penetrate into the dense area inside the electrode assembly 130.

[0068] In some embodiments of this application, such as Figures 3 to 15As shown, the second clamping surface 21 is configured as a curved surface convex toward the first clamping surface 11. At least a portion of the second sidewall 102 is intermittently abutted by the corresponding portion of the second clamping surface 21 to achieve a breathing-like clamping process for the battery cell 100. The fact that the second clamping surface 21 is configured as a curved surface convex toward the first clamping surface 11 means that the geometry of the second clamping surface 21 is also an outwardly convex surface. This curved surface design aims to form a non-planar contact with the second sidewall 102 of the battery cell 100, thereby generating local stress concentration or intermittent contact areas during the clamping process. For example, the second clamping surface 21 can be designed as a spherical cap surface formed by rotating the first generatrix 201 around the first guideline 202, such as... Figures 4 to 6 As shown, its center point or highest point faces the first clamping surface 11. When clamping the battery cell 100, the vertex of the spherical cap surface or its vicinity will first or mainly contact the second sidewall 102 of the battery cell 100; or, the second clamping surface 21 can also be designed as a cylindrical or elliptical cylindrical arc surface, the arc direction of which is parallel or perpendicular to the length or width direction of the battery cell 100 and protrudes towards the first clamping surface 11. This arc surface can form a line contact with the second sidewall 102 of the battery cell 100 when clamped.

[0069] At least a portion of the second sidewall 102 is intermittently abutted by the corresponding portion of the second clamping surface 21, which is one of the keys to achieving "breathing clamping" of the battery cell 100. The second clamping surface 21 applies and releases pressure to the second sidewall 102 periodically, and the first clamping surface 11 simultaneously applies and releases pressure to the first sidewall 101 periodically, causing the electrolyte inside the battery cell 100 to flow and permeate between the positive and negative electrode plates, thereby further improving the wetting efficiency. For example, the driving device can control the second clamping part 20 to periodically move its second clamping surface 21 closer to and further away from the second sidewall 102 of the battery cell 100 at a preset frequency and amplitude, thereby achieving intermittent abutment; or, the driving device can also change the magnitude of the clamping force so that the second clamping surface 21, while maintaining contact with the second sidewall 102, periodically increases and decreases the local pressure, thereby simulating the effect of intermittent abutment.

[0070] The solution of this application sets the second clamping surface 21 as a curved surface protruding toward the first clamping surface 11, so that at least a portion of the second sidewall 102 is intermittently abutted by the corresponding portion of the second clamping surface 21, thereby achieving bilateral breathing clamping on the two opposite sidewalls of the battery cell 100. Specifically, when the driving device drives the first clamping part 10 and the second clamping part 20 to clamp the battery cell 100, the first clamping surface 11 (set as a curved surface protruding toward the second clamping surface 21) corresponds to the first sidewall 101 of the battery cell 100, and the second clamping surface 21 (also set as a curved surface protruding toward the first clamping surface 11) corresponds to the second sidewall 102 of the battery cell 100. Since both the first clamping surface 11 and the second clamping surface 21 are convex curved surfaces, the contact between the first clamping surface 11 and the second clamping surface 21 and the two opposite sidewalls (first sidewall 101 and second sidewall 102) of the battery cell 100 is localized rather than completely planar. This localized contact causes the pressure to concentrate on the convex portion of the curved surface during clamping. During the breathing clamping process, the drive device controls the first clamping part 10 and the second clamping part 20 to move intermittently or apply intermittent clamping force. Thus, the first clamping surface 11 intermittently abuts against at least a portion of the first sidewall 101, and at the same time, the second clamping surface 21 intermittently abuts against at least a portion of the second sidewall 102. This bilateral, localized, intermittent abutment causes the battery cell 100 to be subjected to periodic, non-uniform compression and release in the first direction X. When clamping force is applied, the battery cell 100 is locally compressed, and the internal electrolyte permeates into the uncompressed areas under pressure. When the clamping force decreases or is released, the battery cell 100 recovers, forming a slight negative pressure, which further draws in electrolyte. By simultaneously applying this breathing-type clamping to both sides of the battery cell 100, the fluidity of the electrolyte within the battery cell 100 can be promoted more evenly and efficiently to enhance the wetting effect, especially in the central region of the electrode assembly 130 or areas that are difficult to wet.

[0071] As an example, the first clamping part 10 and the second clamping part 20 can be made of high-strength, corrosion-resistant materials (such as stainless steel or engineering plastics), and the first clamping surface 11 and the second clamping surface 21 can both be formed by precision machining processes, such as CNC milling or mold forming, to make their surfaces present a smooth spherical cap surface. The clamping surfaces of these two spherical cap surfaces can have the same radius of curvature, or be designed with different radii of curvature according to the characteristics of the battery cell 100. The driving device can include two independent servo motors, respectively connected to the first clamping part 10 and the second clamping part 20. Each servo motor precisely controls the reciprocating motion of the corresponding clamping part along the first direction X through a lead screw transmission mechanism or a gear and rack mechanism. During the breathing clamping process, the control system can preset a clamping cycle, for example, performing a "clamping-release" cycle every 5 seconds. During the clamping phase, two servo motors simultaneously drive the first clamping part 10 and the second clamping part 20 closer to the battery cell 100 until the first clamping surface 11 and the second clamping surface 21 abut against the first sidewall 101 and the second sidewall 102 of the battery cell 100 with a preset clamping force, respectively. Since both clamping surfaces are curved, the contact area is localized. During the release phase, the servo motors reverse the direction and drive the clamping parts slightly away from the battery cell 100, thereby reducing the clamping force or releasing it completely, allowing the battery cell 100 to recover. This intermittent, breathing-style clamping process with dual curved surfaces can continue until the electrolyte wetting inside the battery cell 100 reaches a preset standard.

[0072] Through the above technical solution, the second clamping surface 21 is also set as a curved surface protruding towards the first clamping surface 11, and cooperates with the first clamping surface 11 to realize double-sided breathing clamping on the two opposite side walls of the battery cell 100. This structure and working method of intermittent contact of the double curved surfaces allows the battery cell 100 to be subjected to periodic local compression and release from both the positive and negative directions of the first direction X during the liquid injection process, thereby improving the liquid injection efficiency and product consistency of the battery cell 100.

[0073] Combination Figure 10 and Figure 11 As shown, in some embodiments of this application, the driving device of the battery injection clamp includes a first driving unit, which is drivenly connected to the first clamping unit 10 and the second clamping unit 20. The first driving unit drives the first clamping unit 10 and the second clamping unit 20 to move closer to each other or further away from each other. Furthermore, the first driving unit drives the first clamping unit 10 and the second clamping unit 20 to intermittently abut against the battery cell 100 to achieve a breathing-like clamping process on the battery cell 100. Additionally, the highest point of the protrusion of the first clamping surface 11 abuts against the midpoint of the first sidewall 101, and the highest point of the protrusion of the second clamping surface 21 abuts against the midpoint of the second sidewall 102.

[0074] In this embodiment, the first driving unit, as the core component of the driving device, functions to directly drive the relative movement of the first clamping unit 10 and the second clamping unit 20. This first driving unit can be implemented in various forms. For example, it can be a lead screw mechanism driven by a servo motor, where the precise rotation of the motor controls the advance and retreat of the lead screw, thereby driving the clamping unit to move; alternatively, it can be a pneumatic or hydraulic cylinder, where the on / off state and magnitude of air or hydraulic pressure drive the piston rod to extend and retract, thus driving the clamping unit; or it can be a cam mechanism, where the rotation curve design of the cam enables control of the specific motion trajectory of the clamping unit.

[0075] Here, "drive connection" refers to the establishment of a mechanical or fluid connection between the power output end of the first drive unit and the first clamping part 10 and the second clamping part 20, so that the motion of the first drive unit can be effectively transmitted and acted on the two clamping parts. This connection can be achieved through linkages, gear racks, synchronous belts, or hydraulic / pneumatic pipelines. For example, a symmetrical linkage mechanism can be used to convert the linear reciprocating motion of the first drive unit into the synchronous relative approaching or moving away motion of the two clamping parts; or, it can be designed so that the first drive unit directly drives one of the clamping parts, while the other clamping part is kept relatively fixed or passively moved by guide rails and limiting structures.

[0076] The first drive unit drives the first clamping part 10 and the second clamping part 20 to move closer to each other or further apart. This movement pattern is the basis for clamping and releasing the battery cell 100. When the first drive unit drives the two clamping parts to move closer to each other, the first clamping part 10 and the second clamping part 20 apply clamping force to the battery cell 100; when the first drive unit drives the two clamping parts to move further apart, the first clamping part 10 and the second clamping part 20 release the clamping force on the battery cell 100. This movement can be precisely adjusted by a control unit inside the first drive unit or an external controller (such as a PLC). This intermittent action can be achieved by programming the movement sequence of the first drive unit. For example, a clamping time and a release time can be set and executed cyclically; or, combined with pressure sensor feedback, the clamping force can be briefly released when it reaches the upper limit and reapplied when it drops to the lower limit, forming a dynamic pressure cycle.

[0077] This embodiment, by incorporating a first driving unit in the driving device and drivingly connecting it to the first clamping unit 10 and the second clamping unit 20, enables precise control of the movement of the two clamping units as they approach or move away from each other. The first driving unit not only performs basic clamping and releasing functions but also executes periodic, rhythmic clamping force application and release actions. Furthermore, this dynamic clamping process, combined with the curved surface design of the first clamping surface 11 and the second clamping surface 21, allows the battery cell 100 to experience cycles of pressure and micro-relaxation during clamping, thus simulating a "breathing" effect. Under pressure, the electrolyte is squeezed into the tiny gaps inside the battery cell 100; under relaxation, the internal structure of the battery cell 100 expands, facilitating further penetration and diffusion of the electrolyte. This intermittent contact, actively controlled by the first driving unit, precisely achieves a breathing-like clamping, ensuring that the electrolyte can more fully and evenly wet all areas of the battery cell 100.

[0078] As an example, the first drive unit can be a ball screw mechanism driven by a high-precision servo motor. The servo motor is connected to the ball screw via a coupling, and the nut seat of the ball screw is connected to a moving platform. A first clamping part 10 is mounted on this moving platform, and a second clamping part 20 is fixed to the other side of the clamp. When the battery cell 100 is placed between the two clamping parts, the servo motor, under the instruction of a programmable logic controller (PLC), drives the ball screw to rotate, thereby causing the first clamping part 10 to move closer to the second clamping part 20 until a preset clamping force is applied to the battery cell 100. To achieve intermittent contact, the PLC, according to a preset program, instructs the servo motor to briefly rotate in the opposite direction by a small angle after the clamping force reaches the set value, causing the first clamping part 10 to move slightly away from the battery cell 100, thus briefly releasing the clamping force. After a brief relaxation cycle, the PLC again instructs the servo motor to rotate forward, restoring the clamping force on the battery cell 100. This "clamping-relaxing" cycle will repeat according to a preset frequency and duration, thereby achieving a breathing-like clamping process for the battery cell 100.

[0079] In this embodiment, the first driving unit in the driving device drives the first clamping part 10 and the second clamping part 20 to intermittently abut against the battery cell 100, i.e., a breathing clamping process. This allows the battery cell 100 to undergo controlled periodic compression and relaxation during the electrolyte injection process, which significantly promotes the penetration and diffusion of the electrolyte inside the electrode assembly 130. Especially for the central region of the electrode assembly 130, which is difficult to wet, the highest point of the first clamping surface 11 abuts against the midpoint of the first sidewall 101 and the highest point of the second clamping surface 21 abuts against the midpoint of the second sidewall 102. This can effectively improve the wettability of the central region of the electrode assembly 130, help improve the wettability and uniformity of the electrolyte, and thus improve the performance and service life of the battery.

[0080] Combination Figure 12 and Figure 13 As shown, in some embodiments of this application, the driving device may include a first driving unit and a second driving unit. The first driving unit is responsible for driving the first clamping part 10 and the second clamping part 20 to move closer to or further away from each other, thereby clamping or releasing the battery cell 100; the second driving unit is specifically used to drive the first clamping part 10 to reciprocate along the second direction Y on the first sidewall 101, and / or drive the second clamping part 20 to reciprocate along the second direction Y on the second sidewall 102. The sliding frequency and stroke of the first clamping part 10 and / or the second clamping part 20 reciprocating along the second direction Y can be adjusted according to the battery type and electrolyte filling requirements. The first driving unit can take various forms; for example, it can be a pneumatic or hydraulic cylinder, which drives the clamping part to move by controlling air pressure or hydraulic pressure; it can also be a lead screw mechanism driven by a servo motor, which drives the linear movement of the lead screw through the rotation of the motor, thereby achieving precise displacement of the clamping part. The second drive unit can be a linear motor that directly generates linear reciprocating motion; or it can be a linkage mechanism or cam mechanism driven by a servo motor that converts rotational motion into linear reciprocating motion of the clamping part. The second direction Y is defined as the length direction of the battery cell 100, and also the closing direction of the end cap 120 of the battery cell 100 to the shell body 110. The first direction X, the second direction Y, and the third direction Z (the width direction of the battery cell 100) are perpendicular to each other and together form an orthogonal coordinate system, which clearly defines the thickness, length, and width of the battery cell 100, providing a precise reference for the motion control of the clamp.

[0081] In this embodiment, the first driving unit and the second driving unit work together to drive the first clamping part 10 and the second clamping part 20 to dynamically clamp the battery cell 100, making the breathing-style clamping process of the battery cell 100 by the battery liquid injection clamp more precise and efficient. Specifically, the first driving unit is responsible for realizing the basic clamping and releasing actions. On this basis, the second driving unit realizes the function of driving the first clamping part 10 and / or the second clamping part 20 to reciprocate along the second direction Y. That is, when the first clamping part 10 or the second clamping part 20 clamps the battery cell 100 and reciprocates along its second direction Y, since the first clamping surface 11 and the second clamping surface 21 are curved surfaces, they interact with the first sidewall 101 of the battery cell 100. A partial contact is formed between the first clamping part 10 and the second clamping part 20. The reciprocating movement of the first clamping part 10 and / or the second clamping part 20 will generate a slight kneading or scraping effect in the contact area. This can effectively agitate the electrolyte inside the battery cell 100, allowing the electrolyte to better diffuse into the tiny gaps between the electrode plates of the electrode assembly 130. It also helps to remove tiny air bubbles that may be trapped inside the battery, achieving a more comprehensive and deeper wetting of the battery cell 100, and significantly improving the penetration efficiency and uniformity of the electrolyte.

[0082] As an exemplary embodiment: the first driving unit can consist of two opposing pneumatic grippers, each gripper being equipped with a first clamping part 10 and a second clamping part 20. The grippers are opened and closed by controlling air pressure, thereby driving the first clamping part 10 and the second clamping part 20 to move closer or further apart, completing the clamping and release of the battery cell 100. The second driving unit can be a linear slide mounted on the grippers, driven by a small servo motor. This linear slide, via a synchronous belt or lead screw mechanism, drives the first clamping part 10 and / or the second clamping part 20 to reciprocate along a preset stroke on the base of the corresponding gripper in the second direction Y. For example, when the battery cell 100 is clamped by the first driving unit, the second driving unit can be activated, causing the first clamping part 10 to reciprocate along the second direction Y on the first sidewall 101; and / or, the second driving unit causes the second clamping part 20 to reciprocate along the second direction Y on the second sidewall 102.

[0083] In this embodiment, while clamping the battery cell 100, the first clamping part 10 and / or the second clamping part 20 reciprocate along the second direction Y, so that the clamping surface performs local dynamic kneading on the battery cell 100. This can more effectively promote the diffusion and penetration of electrolyte inside the battery cell 100. Especially for areas inside the battery cell 100 where the electrolyte flow resistance is large or there are local air bubbles, it can significantly improve the wetting speed and uniformity of the electrolyte, and improve the quality and efficiency of battery electrolyte injection.

[0084] Combination Figure 14 and Figure 15 As shown, in some embodiments of the battery filling clamp of this application, the driving device includes a first driving part and a third driving part. The first driving part is driven to the first clamping part 10 and the second clamping part 20, and drives the first clamping part 10 and the second clamping part 20 to move closer to each other or further away from each other to clamp or release the battery cell 100. The third driving part is driven to the first clamping part 10, and drives the first clamping part 10 to move so that the first clamping surface 11 reciprocates along the first sidewall 101; and / or, the third driving part is driven to the second clamping part 20, and drives the second clamping part 20 to reciprocate along the second sidewall 102. By the reciprocating rolling of the first clamping surface 11 along the first sidewall 101 and / or the reciprocating rolling of the second clamping surface 21 along the second sidewall 102, a breathing-like clamping process is achieved for the battery cell 100.

[0085] The third drive unit can be a linear actuator, such as a lead screw mechanism driven by a stepper motor or servo motor, which converts rotary motion into linear motion and then drives the clamping part to roll through a linkage or gear mechanism; or, the third drive unit can be a rotary actuator, such as a servo motor or pneumatic rotary cylinder, which directly drives an eccentric wheel or rocker arm, thereby causing the clamping part to reciprocate rolling motion; or, the third drive unit can also be a hydraulic or pneumatic cylinder, which drives the piston rod to extend and retract by controlling fluid pressure, and then realizes the rolling of the clamping part through a mechanical linkage mechanism.

[0086] The third driving unit drives the first clamping part 10 to move so that the first clamping surface 11 reciprocates along the first sidewall 101, and / or the third driving unit drives the second clamping part 20 so that the second clamping surface 21 reciprocates along the second sidewall 102, aiming to produce a dynamic, localized squeezing and releasing effect, which can effectively promote the flow of electrolyte inside the battery cell 100 and help to expel trapped air bubbles, thereby promoting uniform electrolyte wetting. Specifically, the third driving unit can be connected to the support structure of the first clamping part 10, and by controlling the overall translation and / or rotation of the first clamping part 10, its curved first clamping surface 11 forms a rolling contact on the surface of the battery cell 100. The second clamping part 20 performs the same rolling as the first clamping part 10, that is, the second clamping surface 21 rolls along the second sidewall 102, further enhancing the dynamic disturbance and air bubble discharge effect on the electrolyte inside the battery cell 100, forming a more comprehensive wetting effect. The third driving unit can drive the first clamping unit 10 and / or the second clamping unit 20 to reciprocate along the first side wall 101 and / or the second clamping surface 21 along the second side wall 102 via a bearing or guide rail structure.

[0087] In this embodiment, the first driving unit first drives the first clamping part 10 and the second clamping part 20 to move closer together, applying an initial clamping force to the battery cell 100. Based on this, the third driving unit drives the first clamping part 10 and / or the second clamping part 20 to perform a reciprocating rolling motion. Due to the curved shape of the first clamping surface 11 and the second clamping surface 21, local high pressure is generated in the contact area, and this high-pressure area moves along the surface of the battery cell 100 during the rolling process. This dynamic, localized pressure change not only squeezes the electrolyte inside the battery cell 100, allowing it to penetrate into unwetted areas, but also effectively pushes air bubbles trapped inside the battery cell 100 outwards. Through this rolling compression, the electrolyte is agitated inside the battery cell 100, enabling it to overcome capillary forces. This allows the electrolyte inside the battery cell 100 to penetrate more fully, evenly, and deeply into all corners of the battery cell 100, especially in areas that are difficult to wet, thereby significantly improving the electrolyte injection efficiency and battery performance.

[0088] As an example, the first driving unit can consist of a pair of cylinders, respectively connected to the first clamping part 10 and the second clamping part 20. By controlling the extension and retraction of the cylinders, the first clamping part 10 and the second clamping part 20 can move closer or further apart, thereby clamping or releasing the battery cell 100. The third driving unit can include a stepper motor and a gear and rack mechanism. The stepper motor drives a rack through a gear. The rack is connected to the first clamping part 10. When the stepper motor rotates forward and backward, the rack drives the first clamping surface 11 of the first clamping part 10 to form a rolling contact on the first side wall 101. Correspondingly, the third driving unit can be equipped with another independent stepper motor and gear and rack mechanism to drive the second clamping part 20, so that its second clamping surface 21 reciprocates along the second side wall 102.

[0089] Through the above technical solution, during the clamping process of the battery cell 100, the first clamping surface 11 and / or the second clamping surface 21 reciprocate along the corresponding side wall of the battery cell 100. This rolling and squeezing action can generate dynamic local pressure changes, effectively promote the flow and penetration of electrolyte inside the battery cell 100, and help to remove trapped air bubbles, significantly improving the uniformity and efficiency of electrolyte wetting, thereby improving the production quality and performance stability of the battery.

[0090] like Figure 4 As shown, in some embodiments of this application, the first clamping surface 11 and / or the second clamping surface 21 are configured as spherical cap surfaces formed by rotating the first generatrix 201 around the first guideline 202, such as... Figures 4 to 6As shown, the first generatrix 201 is an arc, and the first guideline 202 is a straight line. The first guideline 202 passes through the midpoint of the first generatrix 201 and is perpendicular to the tangent at the midpoint of the first generatrix 201. Furthermore, the first guideline 202 is also perpendicular to a plane parallel to the main body unfolding direction of the first clamping part 10 (or, the first guideline 202 is also perpendicular to a plane parallel to the main body unfolding direction of the second clamping part 20). At this time, when the first clamping surface 11 abuts against the first sidewall 101 and the second clamping surface 21 abuts against the second sidewall 102, if the surface of the battery cell 100 is not deformable, then there is point contact between the first clamping surface 11 and the first sidewall 101, and point contact between the second clamping surface 21 and the second sidewall 102. The designation of the first clamping surface 11 and / or the second clamping surface 21 as a spherical cap surface means that the clamping surface has three-dimensional curvature, and its surface is curved in all directions. This surface can be formed by precision machining of metal or high-strength engineering plastic materials with a specific radius of curvature, or by coating or molding a material with a spherical cap surface onto the clamping substrate. The contact method between the spherical cap surface and the surface of the battery cell 100 facilitates the application of high pressure to localized micro-areas of the battery cell 100 during the breathing clamping process, thereby more effectively squeezing out internal gas and promoting electrolyte penetration.

[0091] Alternatively, the first clamping surface 11 and / or the second clamping surface 21 may be configured as an arc surface formed by linear movement of the second generatrix 203 along the second guideline 204, such as... Figures 7 to 9 As shown, the second generatrix 203 is an arc, and the second guideline 204 is a straight line. The second guideline 204 passes through the midpoint of the second generatrix 203 and is perpendicular to the tangent at the midpoint of the second generatrix 203. Furthermore, the second guideline 204 is parallel to a plane parallel to the main body unfolding direction of the first clamping part 10 (or, the second guideline 204 is parallel to a plane parallel to the main body unfolding direction of the second clamping part 20). At this time, when the first clamping surface 11 abuts against the first sidewall 101 and the second clamping surface 21 abuts against the second sidewall 102, if the surface of the battery cell 100 is not deformable, then the first clamping surface 11 and the first sidewall 101 are in line contact, and the second clamping surface 21 and the second sidewall 102 are in line contact. The term "arc surface" refers to a clamping surface having a single curvature direction, such as a portion of a cylindrical surface. The curved surface can be obtained by extrusion molding, bending, or CNC machining of metal, ceramic, or composite materials to achieve a curved surface, or by mounting a roller or strip with a curved surface on the clamping substrate. This contact method between the curved surface and the surface of the battery cell 100 can apply pressure to specific linear areas of the battery cell 100 during the breathing clamping process, which helps guide the electrolyte to wet along a specific path, or allows for targeted treatment of specific structures of the battery cell 100.

[0092] By selecting a spherical cap surface or an arc surface as the specific shape of the clamping surface, a more refined and targeted breathing clamping can be achieved according to the structural characteristics and wetting requirements of the battery cell 100, thereby significantly improving the wetting effect of the electrolyte.

[0093] As an exemplary specific embodiment: When it is necessary to focus on wetting a small local area inside the battery cell 100, both the first clamping surface 11 and the second clamping surface 21 can be set as spherical cap surfaces. During the breathing clamping process, the driving device will periodically make the spherical cap surface clamping surfaces (first clamping surface 11, second clamping surface 21) contact the first sidewall 101 and the second sidewall 102 of the battery cell 100. Each contact will generate a highly concentrated compressive stress point on the surface of the battery cell 100. This stress point can effectively expel the gas in the area and force the electrolyte to fill rapidly. Alternatively, when there is a specific structure inside the battery cell 100 extending along the second direction Y, and the electrolyte needs to be rapidly wetted along this direction, the first clamping surface 11 and the second clamping surface 21 can be set as arc surfaces. During the breathing clamping, the arc surface will form a linear area contact with the battery cell 100, thereby effectively promoting the diffusion of the electrolyte along this direction and ensuring rapid and uniform wetting of the electrolyte along a specific path.

[0094] In some embodiments of this application, such as Figure 3 As shown, the radius of curvature of the first clamping surface 11 is R1, as... Figure 1 As shown, the first sidewall 101 has a length of L1 and a width of L2, where L1 ≥ L2, and 5*L1 ≤ R1 ≤ 10*L1; and / or, as Figure 3 As shown, the radius of curvature of the second clamping surface 21 is R2, as... Figure 1 As shown, the length of the second sidewall 102 is H1, and the width is H2, where H1 ≥ H2, and 5*H1 ≤ R2 ≤ 10*H1. The radius of curvature R1 or R2 is a key parameter measuring the degree of curvature of the first clamping surface 11 or the second clamping surface 21. It directly determines the local pressure distribution and contact area when the clamping surface contacts the battery cell 100. The radius of curvature can be achieved through precision machining or mold forming according to a preset geometry. The length L1 and width L2 of the first sidewall 101 (and the length H1 and width H2 of the second sidewall 102) are the dimensional parameters of the main surfaces of the battery cell 100. Generally, as shown... Figure 1As shown, L1=H1, L2=H2, meaning that the battery cell 100 is a square cell. The proportional relationship of 5*L1≤R1≤10*L1 (and 5*H1≤R2≤10*H1) provides an optimized range for the radius of curvature R1 or R2, ensuring that when the clamping surface contacts the battery cell 100, it can generate sufficient local pressure to promote the "breathing" effect, but will not cause stress concentration due to excessive curvature, thereby avoiding damage to the battery cell 100.

[0095] By establishing a specific proportional relationship between the radius of curvature R1 of the first clamping surface 11 and the dimension L1 of the first sidewall 101 of the battery cell 100, and / or by establishing a specific proportional relationship between the radius of curvature R2 of the second clamping surface 21 and the dimension H1 of the second sidewall 102 of the battery cell 100, i.e., 5*L1≤R1≤10*L1 and / or 5*H1≤R2≤10*H1, the geometric relationship of the contact between the clamping surface and the battery cell 100 is optimized. When the driving device drives the first clamping part 10 and the second clamping part 20 to clamp the battery cell 100, the clamping surface with a specific radius of curvature can ensure that a moderate and controllable local contact area is formed on the first sidewall 101 and the second sidewall 102 of the battery cell 100, which can effectively induce the battery cell 100 to produce a small deformation, i.e., a "breathing" effect, thereby promoting the penetration of electrolyte into the difficult-to-wet areas inside the battery cell 100. Furthermore, the ratio range of the curvature radii of the first clamping surface 11 and the second clamping surface 21 avoids the risk of excessive curvature leading to an excessively large contact area and reduced breathing effect, or excessive curvature leading to excessively high contact pressure and damage to the battery cell 100. Thus, the integrity of the battery cell 100 is taken into account while ensuring the breathing effect.

[0096] As an example, the length L1 of the first sidewall 101 of the battery cell 100 is 120 mm and the width L2 is 60 mm. According to the curvature radius R1 of the first clamping surface 11, it should satisfy 5*L1≤R1≤10*L1, that is, 5*120 mm≤R1≤10*120 mm. Therefore, the range of R1 should be between 600 mm and 1200 mm. Correspondingly, the curvature radius R2 of the second clamping surface 21 is also selected to be between 600 mm and 1200 mm.

[0097] like Figure 3 , Figures 10 to 15As shown, in some embodiments of this application, the battery filling clamp further includes a pressure detection unit 40, which is electrically connected to the driving device. The pressure detection unit 40 includes a pressure sensor 41. Both the first clamping part 10 and the second clamping part 20 are equipped with pressure sensors 41. The pressure sensors 41 are used to detect the clamping force of the first clamping part 10 and the second clamping part 20 on the battery cell 100. The pressure detection unit 40 is a device for monitoring and quantifying the clamping force. The pressure detection unit 40 can be an independent module integrating signal acquisition, processing, and output functions, or it can be a distributed component that communicates with the driving device via a bus or dedicated line. For example, the pressure detection unit 40 can be a microcontroller unit that receives analog or digital signals from the pressure sensor 41 and converts them into control commands that the driving device can understand and respond to. The pressure detection unit 40 is electrically connected to the driving device, which ensures that the pressure detection unit 40 can transmit the detected clamping force data to the driving device in real time. Electrical connections can be wired, such as via data cables or control cables, or wirelessly, such as via Bluetooth, Wi-Fi, or Zigbee protocols. This allows the drive device to adjust its output based on the feedback clamping force data, achieving closed-loop control. The pressure sensor 41 is a device used to convert physical pressure into an electrical signal. For example, the pressure sensor 41 can be a resistance strain gauge pressure sensor, reflecting the pressure magnitude by detecting changes in resistance after force is applied; it can also be a piezoelectric pressure sensor, measuring pressure by utilizing the characteristic that piezoelectric materials generate charge when subjected to force; or it can be a capacitive pressure sensor, measuring pressure by detecting changes in capacitance caused by pressure. The aforementioned pressure sensor 41 has high sensitivity, fast response, and good linearity, enabling it to accurately capture subtle changes in clamping force. Both the first clamping part 10 and the second clamping part 20 are equipped with pressure sensors 41. This dual-sided arrangement ensures accurate mechanical feedback, providing a reliable basis for subsequent clamping force adjustments. By continuously monitoring these clamping forces, the force state of the battery cell 100 during the breathing clamping process can be understood in real time, providing necessary feedback information to the drive device to achieve precise force control.

[0098] The pressure detection unit 40 enables the battery liquid injection clamp to sense and precisely control the clamping force in real time when the battery cell 100 is subjected to a breathing clamping action. Specifically, when the drive device drives the first clamping part 10 and the second clamping part 20 to clamp the battery cell 100, the pressure sensor 41 installed on the first clamping part 10 and the second clamping part 20 will simultaneously detect the clamping force applied to the battery cell 100, collect and process this clamping force data, and feed it back to the drive device in real time. Based on the received clamping force data, combined with preset clamping force parameters or a breathing clamping strategy, the drive device dynamically adjusts its output, such as adjusting the amplitude, frequency, or magnitude of the movement of the first clamping part 10 and the second clamping part 20 toward or away from each other. In this way, the battery cell 100 is always within a controlled and appropriate clamping force range during the entire breathing clamping process, avoiding damage to the battery cell 100 that may be caused by excessive clamping force, and also preventing the problem of poor breathing effect caused by insufficient clamping force. This effectively promotes the uniform wetting of electrolyte inside the battery cell 100, and improves electrolyte injection efficiency and battery performance.

[0099] As an example, the pressure detection unit 40 may integrate a microcontroller that receives analog voltage signals from the pressure sensor 41 via an analog-to-digital converter (ADC), and the pressure sensor 41 may be a thin-film pressure sensor, which is characterized by its small size, fast response, and ease of integration into the vicinity of the clamping surface. When the first clamping part 10 and the second clamping part 20 clamp the battery cell 100, the thin-film pressure sensor 41 senses the pressure and outputs a corresponding electrical signal. These signals are collected by the microcontroller of the pressure detection part 40, filtered, amplified and digitized, and converted into electrical signals representing the magnitude of the clamping force. Subsequently, the microcontroller sends these electrical signals to the controller of the drive device through a serial communication interface (such as SPI or I2C). After receiving the clamping force data, the controller of the drive device compares it with a preset clamping force threshold. If the detected clamping force exceeds the preset range, the controller of the drive device will immediately issue an instruction to adjust the operating parameters of the drive part (such as a stepper motor or servo motor), such as reducing or increasing the drive current or adjusting the motion stroke, thereby adjusting the clamping state of the first clamping part 10 and the second clamping part 20 in real time to maintain the clamping force within the target range.

[0100] In this embodiment, based on the real-time feedback of clamping force from the pressure detection unit 40, the drive device can be dynamically adjusted to ensure that the clamping force is always within the optimal range. This precise clamping force control optimizes the wetting effect of the electrolyte inside the battery cell 100, improves the uniformity and efficiency of electrolyte injection, and helps to improve the production quality and performance consistency of the battery cell 100. Furthermore, this precise clamping force control can avoid physical damage to the battery cell 100 caused by improper force and helps to improve the accuracy and stability of the breathing clamping process.

[0101] like Figure 11 , Figure 13 and Figure 15As shown, in some embodiments of this application, the battery electrolyte injection fixture further includes a wetting detection structure 30. The wetting detection structure 30 is used to detect the degree to which any area inside the battery cell 100 is wetted by the electrolyte. The wetting detection structure 30 is electrically connected to a driving device. Based on the detected data of electrolyte wetting of the battery cell 100, the wetting detection structure 30 controls the driving device to drive the first clamping part 10 and the second clamping part 20 to perform targeted movements, thereby promoting the wetting degree of difficult-to-wet areas inside the battery cell 100. The wetting detection structure 30 is a device for real-time or near-real-time monitoring of the electrolyte distribution and wetting state inside the battery cell 100. For example, the wetting detection structure 30 can employ detection methods based on changes in ultrasonic attenuation or propagation speed, inferring the wetting condition by analyzing changes in the propagation characteristics of ultrasonic waves inside the battery; alternatively, the wetting detection structure 30 can also employ electrical methods based on electrical impedance spectroscopy (EIS) or capacitance tomography (ECT), indirectly reflecting the degree of wetting by measuring the electrical characteristics inside the battery; furthermore, the wetting detection structure 30 can also employ non-destructive testing techniques such as X-ray imaging or neutron beam imaging to directly observe the distribution of electrolyte inside the battery. The wetting detection structure 30 can detect the degree of electrolyte wetting in any region inside the battery cell 100: the wetting detection structure 30 can perform zonal scanning or multi-point measurement of the battery cell 100 to obtain wetting data for each region; alternatively, the wetting detection structure 30 can also establish a physical model of the battery cell 100, combine it with data from a limited number of measurement points, and use algorithms to calculate the overall wetting distribution map. The wetting detection structure 30 is electrically connected to the drive device to ensure that the wetting detection structure 30 can transmit the detected data to the drive device in real time or near real time, so that the drive device can respond based on the data. The electrical connection can be achieved via wired communication methods such as RS232, RS485, or Ethernet, connecting the controller of the wetting detection structure 30 to the controller of the drive device; alternatively, the electrical connection can also be achieved via wireless communication methods such as Wi-Fi, Bluetooth, or ZigBee. The wetting detection structure 30 controls the drive device to drive the first clamping part 10 and the second clamping part 20 to perform targeted movements based on the detected data of the battery cell 100 being wetted by the electrolyte. This is the core mechanism for promoting the wetting degree of difficult-to-wet areas. When insufficient wetting is detected in a certain area, the wetting detection structure 30 can instruct the driving device to increase the clamping force, clamping frequency, or change the clamping position corresponding to that area to squeeze the battery cell 100 and promote electrolyte flow. Alternatively, the wetting detection structure 30 can dynamically adjust the reciprocating range or speed of the first clamping part 10 and / or the second clamping part 20 based on wetting data, causing them to perform a longer or more vigorous "rubbing" action in the difficult-to-wet areas. In this way, through the above-mentioned targeted control, the degree of wetting in the difficult-to-wet areas within the battery cell 100 can be promoted, solving the problem of uneven electrolyte wetting.

[0102] As an exemplary embodiment, the wetting detection structure 30 can be configured with multiple ultrasonic sensor arrays, distributed outside or inside the first clamping part 10 and the second clamping part 20, for real-time transmission and reception of ultrasonic signals. During electrolyte injection into the battery cell 100, these ultrasonic signals penetrate the battery cell 100, and their propagation speed and attenuation vary depending on the degree of electrolyte wetting. The control unit of the wetting detection structure 30 receives and analyzes this ultrasonic data to construct a wetting distribution map inside the battery cell 100. For example, when it is detected that a certain local area of ​​the battery cell 100 (e.g., the area near the edge of the electrode sheet) has low ultrasonic attenuation or high propagation speed, indicating insufficient electrolyte wetting in that area, the wetting detection structure 30 immediately sends a command to the driving device. If the driving device includes a first driving part, the command may require the first driving part to increase the clamping force or clamping frequency at the location corresponding to the difficult-to-wet area, combined with... Figure 10 and Figure 11 As shown; if the driving device includes a first driving part and a second driving part, the instruction may require the second driving part to drive the first clamping part 10 and / or the second clamping part 20 to perform more frequent or wider reciprocating movements on the first sidewall 101 and / or the second sidewall 102 corresponding to the difficult-to-wet area of ​​the battery cell 100, so as to promote the penetration of electrolyte through mechanical action, combined with Figure 12 and Figure 13 As shown; if the drive device includes a first drive unit and a third drive unit, the instruction may require the third drive unit to drive the first clamping part 10 and / or the second clamping part 20 to perform more frequent reciprocating rolling on the first sidewall 101 and / or the second sidewall 102 corresponding to the difficult-to-wet area of ​​the battery cell 100, in combination with Figure 14 and Figure 15 As shown.

[0103] The wetting detection structure 30 can detect the degree of electrolyte wetting inside the battery cell 100 in real time or near real time and identify areas that are difficult to wet. Based on this detection data, the wetting detection structure 30 can intelligently control the drive device to make the first clamping part 10 and the second clamping part 20 perform targeted movements on the battery cell 100, thereby effectively applying additional mechanical action, such as local squeezing or kneading, to the areas that are difficult to wet, thus significantly promoting the penetration and diffusion of electrolyte in these areas, ensuring sufficient and uniform wetting of the electrolyte inside the battery cell 100, and thereby improving the battery's performance consistency, cycle life and safety.

[0104] like Figure 11 , Figure 13 and Figure 15As shown, in some embodiments of this application, the wetting detection structure 30 includes an ultrasonic transmitter 31, an optical microphone 32, and a feedback control component 33. The ultrasonic transmitter 31 and the optical microphone 32 are respectively located on opposite sides of the battery cell 100. The ultrasonic transmitter 31 emits ultrasonic waves into the battery cell 100. The feedback control component 33 is electrically connected to the optical microphone 32 and the driving device. Based on the data fed back from the optical microphone 32, the feedback control component 33 controls the driving device to drive the first clamping part 10 and the second clamping part 20 to perform targeted movements, thereby promoting the wetting degree of difficult-to-wet areas within the battery cell 100.

[0105] in:

[0106] The ultrasonic transmitter 31 is a device capable of generating ultrasonic signals. Its function is to act as a detection source, emitting ultrasonic waves into the interior of the battery cell 100, and utilizing the differences in the propagation characteristics of ultrasonic waves in different media (such as electrolyte, air, or internal battery materials) to detect the wetting state. The ultrasonic transmitter 31 can employ a piezoelectric ceramic transducer, which generates ultrasonic waves by applying a high-frequency electrical signal to cause it to vibrate; alternatively, the ultrasonic transmitter 31 can employ an electromagnetic ultrasonic transducer, which generates ultrasonic waves through electromagnetic induction.

[0107] The optical microphone 32 is an acoustic sensor based on the principle of optical interference. Unlike traditional microphones that convert sound waves into electrical signals through a diaphragm, the optical microphone 32 directly detects physical changes (such as fluctuations in air refractive index or surface micro-vibrations) caused by sound waves, offering advantages such as no electromagnetic interference, wide frequency response, and high sensitivity. The optical microphone 32 receives ultrasonic signals passing through the battery cell 100 and converts them into analyzable optical data to assess the propagation characteristics of ultrasonic waves within the battery, thereby inferring the degree of electrolyte wetting. Its characteristics of no electromagnetic interference, wide frequency response, and high sensitivity give it significant advantages in battery electrolyte filling environments. The optical microphone 32 can be structured based on a fiber optic interferometer (e.g., a Fabry-Perot interferometer or a Mach-Zehnder interferometer), where sound waves cause micro-vibrations in the fiber or diaphragm, changing the optical path difference and resulting in changes in interference fringes; alternatively, the optical microphone 32 can be based on the principle of laser Doppler vibration measurement, detecting the Doppler frequency shift caused by surface micro-vibrations induced by sound waves.

[0108] The feedback control component 33 is a processing unit used to receive and analyze data and issue control commands. Its function is to receive ultrasonic data fed back from the optical microphone 32, analyze the wetting state inside the battery cell 100, especially identifying difficult-to-wet areas, and generate control commands based on the analysis results, sending them to the drive device to adjust the motion strategies of the first clamping part 10 and the second clamping part 20. The feedback control component 33 can be composed of a microcontroller (MCU), digital signal processor (DSP), or programmable logic controller (PLC), integrating corresponding signal processing algorithms and control logic; alternatively, the feedback control component 33 can adopt a control system based on an industrial computer (IPC), implementing data analysis and control functions through software. The ultrasonic transmitter 31 and the optical microphone 32 are respectively located on both sides of the battery cell 100, forming a transmissive ultrasonic detection path, allowing ultrasonic waves to penetrate the battery cell 100 and thus comprehensively detect its internal wetting state.

[0109] In this embodiment, ultrasonic waves are emitted to the battery cell 100 via an ultrasonic transmitter 31. After penetrating the battery cell 100, the ultrasonic waves are received by an optical microphone 32 located on the other side. Because the propagation characteristics (e.g., attenuation, sound velocity) of ultrasonic waves differ significantly in different media such as electrolyte and air, the optical microphone 32 can accurately capture these changes in propagation characteristics with its high sensitivity and resistance to electromagnetic interference. The feedback control component 33 receives and analyzes the ultrasonic data fed back by the optical microphone 32, thereby identifying the electrolyte wetting state inside the battery cell 100 in real time and accurately, particularly locating difficult-to-wet areas where air bubbles exist or wetting is insufficient. Based on this precise wetting data, the feedback control component 33 intelligently generates control commands, and the drive device adjusts the breathing-style clamping movement of the first clamping part 10 and the second clamping part 20 according to the commands. For example, adjusting the clamping pressure, frequency, or intermittent contact position to target difficult-to-wet areas helps promote more uniform penetration of the electrolyte into all corners of the battery cell 100, thereby significantly improving injection efficiency and wetting uniformity.

[0110] According to a second aspect of the embodiments of this application, embodiments of this application also provide a battery production line, including the aforementioned battery liquid injection fixture.

[0111] A battery production line refers to a complete system used for the automated or semi-automated production of battery products. It encompasses a series of continuous production processes, from raw material processing, electrode fabrication, cell assembly, electrolyte injection, formation, capacity testing to final testing and packaging. This production line aims to achieve efficient, stable, and high-quality battery production by integrating various specialized equipment and control systems.

[0112] In this battery production line, the aforementioned battery injection fixture is a device specifically designed to hold the battery cell 100 during the battery injection process. The core feature of this fixture is that its first clamping surface 11 is configured as a curved surface convex towards the second clamping surface 21. Driven by a driving device, it can perform a "breathing" clamping motion on the battery cell 100, aiming to promote sufficient electrolyte penetration into the battery cell by intermittently applying and releasing pressure, thereby optimizing the injection effect.

[0113] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery electrolyte injection jig characterized by comprising: The device includes a driving device, a first clamping part, and a second clamping part. The driving device is drivenly connected to the first clamping part and the second clamping part. The first clamping part has a first clamping surface, and the second clamping part has a second clamping surface. The first clamping surface and the second clamping surface are disposed opposite to each other. The first clamping surface is configured as a curved surface protruding toward the second clamping surface. When the driving device drives the first clamping part and the second clamping part to clamp the battery cell, the battery cell has a first sidewall and a second sidewall along a first direction. The first clamping surface corresponds to the first sidewall, and the second clamping surface corresponds to the second sidewall. At least a portion of the first sidewall is intermittently abutted by the corresponding portion of the first clamping surface.

2. The battery liquid injection clamp according to claim 1, characterized in that, The second clamping surface is configured as a curved surface protruding toward the first clamping surface, and at least a portion of the second sidewall is intermittently abutted by the corresponding portion of the second clamping surface.

3. The battery liquid injection clamp according to claim 2, characterized in that, The driving device includes a first driving part, which is drivenly connected to the first clamping part and the second clamping part. The first driving part drives the first clamping part and the second clamping part to move closer to each other or further away from each other. Furthermore, the first driving part drives the first clamping part and the second clamping part to intermittently abut against the battery cell.

4. The battery electrolyte injection clamp according to claim 3, characterized in that, The highest point of the protrusion of the first clamping surface abuts against the midpoint of the first sidewall; And / or, the highest point of the protrusion of the second clamping surface abuts against the midpoint of the second sidewall.

5. The battery electrolyte injection clamp according to claim 2, characterized in that, The driving device includes a first driving unit and a second driving unit; The first driving unit is driven to connect with the first clamping unit and the second clamping unit. The first driving unit drives the first clamping unit and the second clamping unit to move closer to each other or further away from each other in order to clamp or release the battery cell. The second driving unit is driven to connect with the first clamping unit, and the second driving unit drives the first clamping unit to reciprocate along the second direction on the first sidewall; And / or, the second driving part is driven to be connected to the second clamping part, and the second driving part drives the second clamping part to reciprocate along the second direction on the second sidewall; The second direction is perpendicular to the first direction.

6. The battery liquid injection clamp according to claim 2, characterized in that, The driving device includes a first driving unit and a third driving unit; The first driving unit is driven to connect with the first clamping unit and the second clamping unit. The first driving unit drives the first clamping unit and the second clamping unit to move closer to each other or further away from each other in order to clamp or release the battery cell. The third driving part is driven to be connected to the first clamping part, and the third driving part drives the first clamping part to move so that the first clamping surface reciprocates along the first side wall; And / or, the third driving part is driven to be connected to the second clamping part, and the third driving part drives the second clamping part to move so that the second clamping surface reciprocates along the second sidewall.

7. The battery liquid filling clamp according to any one of claims 1-6, characterized in that, The first clamping surface and / or the second clamping surface are configured as spherical cap surfaces formed by rotating the first generatrix around the first directrix; Alternatively, the first clamping surface and / or the second clamping surface may be configured as an arc surface formed by linearly moving the second generatrix along the second guideline.

8. The battery electrolyte injection clamp according to claim 7, characterized in that, The radius of curvature of the first clamping surface is R1, the length of the first sidewall is L1, and the width is L2, wherein L1≥L2, and 5*L1≤R1≤10*L1; And / or, the radius of curvature of the second clamping surface is R2, the length of the second sidewall is H1, and the width is H2, wherein H1≥H2, and 5*H1≤R2≤10*H1.

9. The battery liquid filling clamp according to any one of claims 1-6, characterized in that, The battery liquid injection clamp also includes a pressure detection unit, which is electrically connected to the driving device. The pressure detection unit includes a pressure sensor, and both the first clamping part and the second clamping part are provided with the pressure sensor. The pressure sensor is used to detect the clamping force of the first clamping part and the second clamping part on the battery cell.

10. The battery liquid injection clamp according to claim 5 or 6, characterized in that, The battery electrolyte injection fixture also includes an immersion detection structure, which is used to detect the degree to which any area inside the battery cell is wetted by electrolyte. The immersion detection structure is electrically connected to the drive device.

11. The battery liquid injection clamp according to claim 10, characterized in that, The immersion detection structure includes an ultrasonic transmitter, an optical microphone, and a feedback control component. The ultrasonic transmitter and the optical microphone are respectively located on both sides of the battery cell. The ultrasonic transmitter is used to emit ultrasonic waves to the battery cell. The feedback control component is electrically connected to the optical microphone and the driving device.

12. A battery production line, characterized by Includes the battery liquid injection clamp as described in any one of claims 1-11.

Images