Cell formation device
By combining the clamping mechanism, ultrasonic transducer, and hydrothermal storage tank, the problems of slow electrolyte wetting speed and poor SEI film density are solved, thereby improving battery production efficiency and quality, forming a dense SEI film, and enhancing battery safety and lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- KEPU ULTRASONIC ELECTRONICS TECHCAL
- Filing Date
- 2026-01-07
- Publication Date
- 2026-04-10
AI Technical Summary
In existing technologies, the electrolyte wetting speed during battery manufacturing is slow, especially in low-temperature environments where it can take several hours or even more than ten hours. Furthermore, traditional formation processes are time-consuming, and the SEI film has poor density, resulting in low production efficiency and quality.
A clamping mechanism is used in conjunction with an ultrasonic transducer and a hydrothermal storage tank. Through the synergistic effect of heating and ultrasonic vibration, the permeation of electrolyte in the electrode pores is promoted by the capillary effect of acoustic waves and micro-stirring. Combined with a gas pressurization system, a stable SEI film is formed.
It significantly shortens the electrolyte immersion time, improves the formation quality, enhances battery manufacturing efficiency and quality, forms a dense SEI film, reduces battery internal resistance, and increases cycle life and safety performance.
Smart Images
Figure CN121839945A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of battery manufacturing technology, and more specifically to a cell formation apparatus. Background Technology
[0002] As a core component in new energy vehicles and energy storage systems, the manufacturing process of lithium-ion power batteries directly determines their overall performance and lifespan. In the later stages of battery manufacturing, electrolyte wetting and formation after electrolyte injection are two crucial and time-consuming steps.
[0003] For example, after the battery cell is filled with electrolyte, the electrolyte needs to fully penetrate the tiny pores inside the battery electrodes, separator, and other components to form an efficient ion-conducting pathway. Currently, industrial production commonly uses methods such as room-temperature settling to promote penetration. However, electrolytes have high viscosity, especially at low temperatures, and relying solely on natural penetration and capillary action results in an extremely slow penetration rate, often requiring several hours or even more than ten hours, severely restricting production efficiency. Furthermore, insufficient penetration can lead to increased internal resistance, capacity decay, and even localized lithium deposition, posing serious safety hazards.
[0004] Furthermore, during the formation process, a stable solid electrolyte interphase (SEI) film needs to be formed inside the battery cell. Traditional atmospheric pressure formation processes are time-consuming, and the resulting SEI film has poor density. While existing pressure-based formation processes improve SEI film quality by applying external pressure, the effect of physical pressure alone on accelerating electrolyte diffusion in deep pores is limited, failing to fundamentally solve the problem of low wetting efficiency, resulting in low battery manufacturing efficiency and quality. Summary of the Invention
[0005] The purpose of this invention is to provide a cell formation apparatus that can significantly shorten the electrolyte immersion time, improve the formation quality, and thereby improve the production efficiency and quality of batteries.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: A battery cell formation device includes a clamping mechanism, a driving mechanism, and an ultrasonic transducer; The clamping mechanism includes a clamping frame, and a hydrothermal storage tank and an ultrasonic fixing frame installed on the clamping frame; The hydrothermal storage tank has a heat-conducting plate, the outer side of which can contact the outer surface of the battery cell to hold the battery cell. The ultrasonic fixation frame has an ultrasonic fixation plate, the outer side of which can contact the hydrothermal liquid stored in the hydrothermal storage tank, and the output end of the ultrasonic transducer is connected to the inner side of the ultrasonic fixation plate. The drive mechanism is connected to the clamping frame and can control the heat-conducting plate to clamp the battery cell by driving the clamping frame.
[0007] By employing the technical solution of this invention, after the heat-conducting plate clamps the battery cell, the hot liquid in the hot liquid storage tank can heat the battery cell through the heat-conducting plate, thereby accelerating the wetting speed of the electrolyte inside the battery cell. At the same time, the ultrasonic transducer can transmit the high-frequency micro-vibration driven by the ultrasonic generator to the inside of the battery cell in the form of mechanical waves through the ultrasonic fixing plate, hot liquid, and heat-conducting plate, generating a powerful "acoustic capillary effect" and micro-stirring effect. This greatly overcomes the surface tension and viscosity resistance of the electrolyte, allowing the electrolyte to quickly penetrate into the smallest pores of the electrode. This significantly shortens the electrolyte wetting time, improves the formation quality, and greatly improves the efficiency and quality of battery production.
[0008] Furthermore, the ultrasonic transducer is sealed and installed inside the hydrothermal storage tank by the ultrasonic fixing frame, and the ultrasonic fixing plate is arranged parallel to the heat-conducting plate, thereby enabling more stable and large-area transmission of ultrasonic energy.
[0009] Furthermore, it also includes a guide rail and a slider, the slider being mounted on the guide rail, the clamping frame being mounted on the slider, and the slider sliding along the guide rail so that the heat-conducting plate can clamp the battery cell.
[0010] Furthermore, the clamping mechanism also includes a calibration base, the clamping frame is mounted on the calibration base, the calibration base is mounted on the slider, and the clamping frame is adjustable in its mounting height on the calibration base.
[0011] Therefore, this clamping mechanism can be applied to battery cells of different specifications, improving the versatility of the invention.
[0012] Furthermore, the calibration base is provided with a plurality of first height adjustment holes spaced apart along the height direction, and the clamping frame is provided with a plurality of second height adjustment holes spaced apart along the height direction. By aligning the second height adjustment holes with the first height adjustment holes, the installation height of the clamping frame on the calibration base can be adjusted.
[0013] Furthermore, it also includes a cell positioning assembly, which includes a cell positioning base, a cell positioning plate, and a cell positioning clamp. The cell positioning base can be fixed on the clamping frame, the cell positioning plate is mounted on the cell positioning base, and the cell positioning clamp is mounted on the cell positioning plate. The cell positioning clamp can position the cell on the cell positioning plate, so that the outer surface of the cell is in stable contact with the outer side of the heat-conducting plate.
[0014] Furthermore, the battery cell positioning base includes a telescopic block and a telescopic block fixing base. The battery cell positioning plate is mounted on the telescopic block. The telescopic block is provided with a telescopic adjustment groove extending along the height direction. The telescopic block fixing base is provided with a plurality of telescopic adjustment holes spaced apart along the height direction. By aligning the telescopic adjustment holes with the telescopic adjustment grooves, the installation height of the telescopic block on the telescopic block fixing base can be adjusted.
[0015] Therefore, this cell positioning component can be applied to cells of different specifications, further improving the versatility of the present invention.
[0016] Furthermore, the ultrasonic transducer includes a first transducer and a second transducer; The clamping frame includes a first clamping frame and a second clamping frame, the hydrothermal storage tank includes a first hydrothermal storage tank and a second hydrothermal storage tank, and the ultrasonic fixation frame includes a first ultrasonic fixation frame and a second ultrasonic fixation frame; the first hydrothermal storage tank and the first ultrasonic fixation frame are mounted on the first clamping frame, and the second hydrothermal storage tank and the second ultrasonic fixation frame are mounted on the second clamping frame. The first ultrasonic fixation frame has a first ultrasonic fixation plate, the outer side of which can contact the hydrothermal liquid stored in the first hydrothermal storage tank, and the output end of the first transducer is connected to the inner side of the first ultrasonic fixation plate; the second ultrasonic fixation frame has a second ultrasonic fixation plate, the outer side of which can contact the hydrothermal liquid stored in the second hydrothermal storage tank, and the output end of the second transducer is connected to the inner side of the second ultrasonic fixation plate. The first hydrothermal storage tank has a first heat-conducting plate, the second hydrothermal storage tank has a second heat-conducting plate, and a clamping groove capable of clamping the battery cell is formed between the first heat-conducting plate and the second heat-conducting plate. The drive mechanism can drive the second clamping frame to move relative to the first clamping frame, so as to adjust the opening of the clamping slot and clamp the battery cell between the second heat-conducting plate and the first heat-conducting plate.
[0017] Furthermore, it also includes a base plate and a clamping frame limiting seat. The clamping mechanism and the driving mechanism are both mounted on the base plate. The base plate is provided with a plurality of clamping frame limiting holes at intervals along the opening direction of the clamping groove. The clamping frame limiting seat can be fixed at different positions on the base plate through different clamping frame limiting holes. The clamping frame limiting seat abuts against the side of the first clamping frame away from the second clamping frame to limit the first clamping frame.
[0018] Therefore, the clamping mechanism is more stable as a whole, and it also makes the clamping mechanism applicable to battery cells of different specifications, further improving the versatility of the present invention.
[0019] Furthermore, it also includes a gas pressurization system and a positive pressure explosion-proof enclosure. The base plate, clamping frame limit seat, clamping mechanism, driving mechanism, and ultrasonic transducer are all sealed and housed inside the positive pressure explosion-proof enclosure. The pressurization system includes a gas source, an inlet valve, an exhaust valve, and a gas pressure detection unit. The inlet valve, exhaust valve, and gas pressure detection unit are all installed on the positive pressure explosion-proof enclosure. The gas source is connected to the positive pressure explosion-proof enclosure through the inlet valve.
[0020] Therefore, inert gas can be injected into the positive pressure explosion-proof enclosure to suppress the volatilization and side reactions of the electrolyte at high temperatures, and further promote electrolyte wetting. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of a cell formation apparatus provided in an embodiment.
[0023] Figure 2 for Figure 1 A structural diagram from another perspective.
[0024] Figure 3 for Figure 2 A side view structural diagram.
[0025] Figure 4 for Figure 1 A partial breakdown diagram.
[0026] Figure 5 for Figure 4 A partial breakdown diagram.
[0027] Figure 6 for Figure 5 A schematic diagram of the structure from a planar perspective.
[0028] Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure from the AA perspective.
[0029] Figure 8 for Figure 5 A partial breakdown diagram.
[0030] Figure 9 for Figure 4 A schematic diagram of the structure of the cell positioning component.
[0031] Figure 10 for Figure 9 A side view structural diagram.
[0032] Figure 11 This is a schematic diagram of a positive pressure explosion-proof enclosure structure that can be added to the embodiment.
[0033] Figure 12 This is a schematic diagram of a cabinet structure that can be added to an embodiment.
[0034] Attached diagram labels: 10-battery cell, 11-sealable bag, 20-drive mechanism, 30-ultrasonic transducer, 32-second transducer, 41-guide rail, 42-slider.
[0035] 50-Cell positioning seat, 51-Telescopic block, 52-Telescopic block fixing seat, 53-Telescopic adjustment groove, 54-Telescopic adjustment hole, 60-Cell positioning plate, 70-Cell positioning clamp, 80-Base plate, 90-Clamping frame limit seat.
[0036] 100-Clamping frame, 101-Second height adjustment hole, 110-First clamping frame, 120-Second clamping frame, 200-Hydrothermal storage tank, 201-Heat-conducting plate, 202-Liquid inlet, 203-Liquid outlet, 210-First hydrothermal storage tank, 212-Clamping groove, 220-Second hydrothermal storage tank, 221-Second heat-conducting plate, 300-Ultrasonic fixing frame, 301-Ultrasonic fixing plate, 320-Second ultrasonic fixing frame, 321-Second ultrasonic fixing plate.
[0037] 400 - Calibration base, 401 - First height adjustment hole, 500 - Positive pressure explosion-proof enclosure, 600 - Cabinet. Detailed Implementation
[0038] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.
[0039] In the description of this application, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", "side", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing 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. Therefore, they should not be construed as limitations on this application.
[0040] Unless otherwise expressly specified and limited, the terms "connection," "fixed," and "set" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0041] Furthermore, the terms "first," "second," and "third" 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 as "first," "second," or "third" may explicitly or implicitly include one or more of that feature, unless otherwise expressly specified.
[0042] Please refer to the following: Figures 1 to 8 An embodiment provides a cell formation apparatus, including a clamping mechanism and a driving mechanism 20 (such as...). Figures 1 to 4 ) and ultrasonic transducer 30 (such as Figures 7 to 8 ).
[0043] The clamping mechanism includes a clamping frame 100 and a hydrothermal storage tank 200 and an ultrasonic fixation frame 300 mounted on the clamping frame 100 (e.g., Figures 7 to 8 ).
[0044] The hydrothermal storage tank 200 has a heat-conducting plate 201 (e.g.) Figure 2 , Figures 5 to 7 The outer surface of the heat-conducting plate 201 can contact the outer surface of the battery cell 10 to clamp the battery cell 10. In this embodiment, the hot liquid in the hot liquid storage tank 200 can specifically be hot water, and the hot liquid storage tank 200 is provided with an inlet 202 and an outlet 203 (e.g., hot water). Figures 4-5 , Figure 8 This allows for the circulation and constant temperature of hot water. The heat-conducting plate 201 can be made of a material with good thermal conductivity.
[0045] The ultrasonic fixation frame 300 has an ultrasonic fixation plate 301 (such as...) Figures 7 to 8 The outer side of the ultrasonic fixing plate 301 can contact the hydrothermal liquid stored in the hydrothermal storage tank 200, and the output end of the ultrasonic transducer 30 is connected to the inner side of the ultrasonic fixing plate 301.
[0046] The drive mechanism 20 is connected to the clamping frame 100 and can control the heat-conducting plate 201 to clamp the battery cell 10 by driving the clamping frame 100. In this embodiment, the drive mechanism 20 adopts a servo electric cylinder, which can improve control accuracy.
[0047] In this embodiment, after the heat-conducting plate 201 clamps the battery cell 10, the hot liquid in the hot liquid storage tank 200 can heat the battery cell 10 through the heat-conducting plate 201, thereby accelerating the wetting speed of the electrolyte inside the battery cell 10. At the same time, the ultrasonic transducer 30 can transmit the high-frequency micro-vibration driven by the ultrasonic generator (not shown) in the form of mechanical waves through the ultrasonic fixing plate 301, the hot liquid and the heat-conducting plate 201 to the inside of the battery cell 10, generating a strong "acoustic capillary effect" and micro-stirring effect, which greatly overcomes the surface tension and viscosity resistance of the electrolyte, allowing the electrolyte to quickly penetrate into the smallest pores of the electrode, thereby significantly shortening the electrolyte wetting time, improving the formation quality and achieving a significant improvement in battery manufacturing efficiency and quality.
[0048] Please continue reading. Figures 7 to 8 As a preferred embodiment, the ultrasonic transducer 30 is sealed and installed inside the hydrothermal storage tank 200 by an ultrasonic mounting bracket 300, meaning that the ultrasonic transducer 30 itself does not come into contact with the hydrothermal liquid. Meanwhile, the ultrasonic mounting plate 310 and the heat-conducting plate 201 are arranged parallel to each other, thereby enabling more stable and larger-area transmission of ultrasonic energy.
[0049] Please continue reading. Figures 1 to 4 As a preferred embodiment, this embodiment also includes a guide rail 41 and a slider 42. The slider 42 is mounted on the guide rail 41, and the clamping frame 100 is mounted on the slider 42. The slider 42 slides along the guide rail 41 so that the heat-conducting plate 201 can clamp the battery cell 10.
[0050] To improve versatility, the clamping mechanism also includes a calibration base 400, on which the clamping frame 100 is mounted. The calibration base 400 is mounted on the slider 42, and the clamping frame 100 is adjustable in its mounting height on the calibration base 400. This allows the clamping mechanism to be adapted to different specifications of battery cells.
[0051] In this embodiment, the calibration base 400 is provided with a plurality of first height adjustment holes 401 spaced apart along the height direction, and the clamping frame 100 is provided with a plurality of second height adjustment holes 101 spaced apart along the height direction. By different alignment installations of the second height adjustment holes 101 and the first height adjustment holes 401 (for example, the two are installed by screwing them together), the installation height of the clamping frame 100 on the calibration base 400 can be adjusted.
[0052] Please see Figures 1 to 4 , Figures 9 to 10As a preferred embodiment, this embodiment also includes a cell positioning assembly, which includes a cell positioning base 50, a cell positioning plate 60, and a cell positioning clamp 70. The cell positioning base 50 can be fixed on the clamping frame 100, the cell positioning plate 60 is mounted on the cell positioning base 50, and the cell positioning clamp 70 is mounted on the cell positioning plate 60. The cell positioning clamp 70 can position the cell 10 on the cell positioning plate 60, so that the outer surface of the cell 10 is in stable contact with the outer side of the heat-conducting plate 201.
[0053] In this embodiment, the battery cell 10 is connected to a plastic sealing bag 11, such as Figure 9 As shown, the cell positioning clamp 70 positions the cell 10 by pressing the plastic bag 11 onto the cell positioning plate 60. In other embodiments, the cell positioning clamp can also position the cell 10 onto the cell positioning plate 60 by pressing on parts such as the tabs.
[0054] To further improve versatility, the cell positioning base 50 includes a telescopic block 51 and a telescopic block fixing base 52. The cell positioning plate 60 is mounted on the telescopic block 51. The telescopic block 51 is provided with a telescopic adjustment groove 53 extending along the height direction. The telescopic block fixing base 52 is provided with a plurality of telescopic adjustment holes 54 spaced apart along the height direction. By different alignment installations of the telescopic adjustment holes 54 and the telescopic adjustment groove 53 (for example, the two are installed by screw connection), the installation height of the telescopic block 51 on the telescopic block fixing base 52 can be adjusted to suit different specifications of cells.
[0055] Continue reading Figure 1 and Figure 2 For reference only. Figure 1 and Figure 2 Four clamping frames 100 are shown, including a hydrothermal storage tank 200 and an ultrasonic fixation frame 300 respectively mounted on each clamping frame 100. Figure 7 or Figure 8 For ease of description, we will take one set of clamping frames 100 as an example and name them as the first clamping frame 110 and the second clamping frame 120, respectively. Based on a similar naming rule, the hydrothermal storage tank 200 and the ultrasonic fixation frame 300 installed on the first clamping frame 110 are respectively the first hydrothermal storage tank 210 and the first ultrasonic fixation frame (not shown in the figure, but their structure can be referred to as the second ultrasonic fixation frame 320). The hydrothermal storage tank 200 and the ultrasonic fixation frame 300 installed on the second clamping frame 120 are respectively the second hydrothermal storage tank 220 and the second ultrasonic fixation frame 320, and so on.
[0056] The ultrasonic transducer 30 includes a first transducer (not shown in the figure, but its structure can be referenced from the second transducer 32) and a second transducer 32.
[0057] The first ultrasonic fixation frame has a first ultrasonic fixation plate (not shown in the figure, its structure can be referred to as the second ultrasonic fixation plate 321). The outer side of the first ultrasonic fixation plate can contact the hydrothermal liquid stored in the first hydrothermal storage tank 210. The output end of the first transducer 31 is connected to the inner side of the first ultrasonic fixation plate. The second ultrasonic fixation frame 320 has a second ultrasonic fixation plate 321. The outer side of the second ultrasonic fixation plate 321 can contact the hydrothermal liquid stored in the second hydrothermal storage tank 220. The output end of the second transducer 32 is connected to the inner side of the second ultrasonic fixation plate 321.
[0058] The first hydrothermal storage tank 210 has a first heat-conducting plate (not shown in the figure, its structure can be referred to the second heat-conducting plate 221), and the second hydrothermal storage tank 220 has a second heat-conducting plate 221. A clamping groove 212 capable of clamping the battery cell 10 is formed between the first heat-conducting plate and the second heat-conducting plate 221.
[0059] The drive mechanism 20 can drive the second clamping frame 120 to move relative to the first clamping frame 110, so as to adjust the opening of the clamping slot 212 and make the second heat-conducting plate 221 and the first heat-conducting plate clamp the battery cell 10.
[0060] As a preferred embodiment, this embodiment also includes a base plate 80 and a clamping frame limiting seat 90. Both the clamping mechanism and the drive mechanism 20 are mounted on the base plate 80. The base plate 80 has multiple clamping frame limiting holes (not shown) spaced apart along the opening direction of the clamping groove 212. The clamping frame limiting seat 90 can be fixed to different positions on the base plate 80 through different clamping frame limiting holes. The clamping frame limiting seat 90 abuts against the side of the first clamping frame 110 away from the second clamping frame 120 to limit the position of the first clamping frame 100. This makes the clamping mechanism more stable overall and also allows it to be used with different specifications of battery cells, further improving the versatility of this embodiment.
[0061] Please see Figure 11 This embodiment also includes a gas pressurization system and a positive pressure explosion-proof enclosure 500. The base plate 80, the clamping frame limiting seat 90, the clamping mechanism, the drive mechanism 20, and the ultrasonic transducer 30 are all sealed and housed inside the positive pressure explosion-proof enclosure 500. The pressurization system includes a gas source, an inlet valve, an exhaust valve, and a gas pressure detection unit. The inlet valve, the exhaust valve, and the gas pressure detection unit are all installed on the positive pressure explosion-proof enclosure 500. The gas source is connected to the positive pressure explosion-proof enclosure 500 through the inlet valve.
[0062] In this embodiment, inert gas can be injected into the positive pressure explosion-proof enclosure 500 to maintain the internal pressure of the positive pressure explosion-proof enclosure 500 within a preset positive pressure range. It can also cycle between normal pressure and positive pressure according to a preset program. This positive pressure environment helps to suppress the volatilization and side reactions of the electrolyte at high temperatures. On the other hand, it can apply uniform lateral pressure to the battery electrode, which, together with ultrasonic vibration and heating, promotes electrolyte wetting and creates conditions for subsequent high-quality formation.
[0063] Please see Figure 12 In this embodiment, the cell formation device can be installed entirely inside a cabinet 600, and a control panel, temperature monitoring system, pressure detection system, alarm system, etc. can be installed on the cabinet 600. The application method is as follows: The operator places the electrolyte-filled battery cell 10 into the clamping slot 212 inside the positive pressure explosion-proof enclosure 500 and closes the cabinet 600; after selecting the preset process formula on the control panel, the battery cell formation device is started; the drive mechanism 20 drives the clamping mechanism to clamp the battery cell, and at the same time, the hot liquid storage tank 200 starts working, heating the battery cell 10 to 50-60℃; the air inlet valve is opened, and nitrogen is injected into the positive pressure explosion-proof enclosure 500, with the pressure stabilized at 25KPa; the ultrasonic generator and ultrasonic transducer 30 are started, switching between 28KHz and 40KHz dual frequencies, sequentially driving the battery cell 10 to perform high-frequency micro-vibration through the ultrasonic fixing plate 301, hot liquid, and heat-conducting plate 201, which greatly promotes the penetration and diffusion of the viscous electrolyte inside the battery cell 10 into the electrode plates. That is, the entire formation process is efficiently completed under the synergistic effect of the "heat-pressure-vibration" three fields.
[0064] This embodiment utilizes the synergistic effects of multiple physical fields, such as heating, pressurization, and ultrasonic vibration, to ensure that the electrolyte fills the electrode pores rapidly, deeply, and uniformly, effectively eliminating wetting dead zones. It also reduces battery internal resistance, improves initial coulombic efficiency, increases volumetric energy density, and forms a more stable and dense SEI film, thereby enhancing battery cycle life and safety performance.
[0065] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A cell formation apparatus, characterized in that, Includes a clamping mechanism, a drive mechanism, and an ultrasonic transducer; The clamping mechanism includes a clamping frame, and a hydrothermal storage tank and an ultrasonic fixing frame installed on the clamping frame; The hydrothermal storage tank has a heat-conducting plate, the outer side of which can contact the outer surface of the battery cell to hold the battery cell. The ultrasonic fixation frame has an ultrasonic fixation plate, the outer side of which can contact the hydrothermal liquid stored in the hydrothermal storage tank, and the output end of the ultrasonic transducer is connected to the inner side of the ultrasonic fixation plate. The drive mechanism is connected to the clamping frame and can control the heat-conducting plate to clamp the battery cell by driving the clamping frame.
2. The cell formation apparatus according to claim 1, characterized in that, The ultrasonic transducer is sealed and installed inside the hydrothermal storage tank by the ultrasonic fixing frame, and the ultrasonic fixing plate is arranged parallel to the heat-conducting plate.
3. The cell formation apparatus according to claim 1, characterized in that, It also includes a guide rail and a slider, the slider being mounted on the guide rail and the clamping frame being mounted on the slider. The slider slides along the guide rail so that the heat-conducting plate can clamp the battery cell.
4. The cell formation apparatus according to claim 3, characterized in that, The clamping mechanism further includes a calibration base, the clamping frame is mounted on the calibration base, the calibration base is mounted on the slider, and the clamping frame is adjustable in its mounting height on the calibration base.
5. The cell formation apparatus according to claim 4, characterized in that, The calibration base is provided with a plurality of first height adjustment holes spaced apart along the height direction, and the clamping frame is provided with a plurality of second height adjustment holes spaced apart along the height direction. By aligning the second height adjustment holes with the first height adjustment holes, the installation height of the clamping frame on the calibration base can be adjusted.
6. The cell formation apparatus according to claim 1, characterized in that, It also includes a cell positioning assembly, which includes a cell positioning base, a cell positioning plate, and a cell positioning clamp. The cell positioning base can be fixed on the clamping frame, the cell positioning plate is mounted on the cell positioning base, and the cell positioning clamp is mounted on the cell positioning plate. The cell positioning clamp can position the cell on the cell positioning plate, so that the outer surface of the cell is in stable contact with the outer side of the heat-conducting plate.
7. The cell formation apparatus according to claim 6, characterized in that, The battery cell positioning base includes a telescopic block and a telescopic block fixing base. The battery cell positioning plate is mounted on the telescopic block. The telescopic block is provided with a telescopic adjustment groove extending along the height direction. The telescopic block fixing base is provided with a plurality of telescopic adjustment holes spaced apart along the height direction. By aligning the telescopic adjustment holes with the telescopic adjustment grooves, the installation height of the telescopic block on the telescopic block fixing base can be adjusted.
8. The cell formation apparatus according to any one of claims 1-7, characterized in that, The ultrasonic transducer includes a first transducer and a second transducer; The clamping frame includes a first clamping frame and a second clamping frame, the hydrothermal storage tank includes a first hydrothermal storage tank and a second hydrothermal storage tank, and the ultrasonic fixation frame includes a first ultrasonic fixation frame and a second ultrasonic fixation frame; the first hydrothermal storage tank and the first ultrasonic fixation frame are mounted on the first clamping frame, and the second hydrothermal storage tank and the second ultrasonic fixation frame are mounted on the second clamping frame. The first ultrasonic fixation frame has a first ultrasonic fixation plate, the outer side of which can contact the hydrothermal liquid stored in the first hydrothermal storage tank, and the output end of the first transducer is connected to the inner side of the first ultrasonic fixation plate; the second ultrasonic fixation frame has a second ultrasonic fixation plate, the outer side of which can contact the hydrothermal liquid stored in the second hydrothermal storage tank, and the output end of the second transducer is connected to the inner side of the second ultrasonic fixation plate. The first hydrothermal storage tank has a first heat-conducting plate, the second hydrothermal storage tank has a second heat-conducting plate, and a clamping groove capable of clamping the battery cell is formed between the first heat-conducting plate and the second heat-conducting plate. The drive mechanism can drive the second clamping frame to move relative to the first clamping frame, so as to adjust the opening of the clamping slot and clamp the battery cell between the second heat-conducting plate and the first heat-conducting plate.
9. The cell formation apparatus according to claim 8, characterized in that, It also includes a base plate and a clamping frame limiting seat. The clamping mechanism and the driving mechanism are both mounted on the base plate. The base plate is provided with a plurality of clamping frame limiting holes at intervals along the opening direction of the clamping groove. The clamping frame limiting seat can be fixed at different positions on the base plate through different clamping frame limiting holes. The clamping frame limiting seat abuts against the side of the first clamping frame away from the second clamping frame to limit the first clamping frame.
10. The cell formation apparatus according to claim 9, characterized in that, It also includes a gas pressurization system and a positive pressure explosion-proof enclosure. The base plate, clamping frame limit seat, clamping mechanism, driving mechanism and ultrasonic transducer are all sealed and housed inside the positive pressure explosion-proof enclosure. The pressurization system includes a gas source, an inlet valve, an exhaust valve and a gas pressure detection unit. The inlet valve, exhaust valve and gas pressure detection unit are all installed on the positive pressure explosion-proof enclosure. The gas source is connected to the positive pressure explosion-proof enclosure through the inlet valve.