Bare cell infiltration device
By incorporating a driving component within the immersion device to rotate the electrolyte and coordinate with the tray rotation, the problem of low immersion efficiency of bare lithium-ion battery cells is solved, enabling rapid and thorough immersion and simplifying the battery manufacturing process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BATTEROTECH CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-08
AI Technical Summary
Existing impregnation methods for bare lithium-ion battery cells are inefficient, resulting in long preparation times and affecting battery performance and safety.
A bare cell immersion device is designed. By setting a driving component in the immersion chamber to make the electrolyte rotate in a specific direction, and combined with the rotation of the tray, the electrolyte can be fully refluxed and evenly distributed inside the bare cell.
It accelerates the impregnation process of bare cells, shortens the impregnation time, improves impregnation efficiency, and reduces the complexity of battery manufacturing processes.
Smart Images
Figure CN224217504U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery manufacturing technology, and more specifically, to a bare cell immersion device. Background Technology
[0002] Currently, the high energy density and long cycle life of lithium-ion batteries are closely related to the degree of cell wetting. Therefore, after the bare cells of lithium-ion batteries are manufactured, they need to be wetted with electrolyte. The wetting effect of the bare cells will directly affect the electrical performance of lithium-ion batteries. Too much, too little, or uneven wetting of the bare cells will directly reduce the electrical performance of lithium-ion batteries, and in severe cases, it may even affect the safety performance of the batteries.
[0003] Currently, the industrial method for immersing battery cells typically involves injecting electrolyte into the bare cells and then subjecting them to prolonged static immersion at room temperature or high temperature to ensure full immersion. However, since the immersion time is typically over 48 hours, the immersion efficiency of the bare cells is low, resulting in a long overall battery manufacturing time. Utility Model Content
[0004] The purpose of this invention is to provide a bare battery cell wetting device that can accelerate the wetting of bare battery cells.
[0005] The embodiments of this utility model can be implemented as follows:
[0006] In a first aspect, this utility model provides a bare battery cell wetting device, comprising:
[0007] The device body has an immersion cavity inside for containing electrolyte. The device body also has a first driving member for driving the electrolyte in the immersion cavity to rotate in a first direction.
[0008] A tray is provided with multiple placement parts for placing bare battery cells. The tray is placed inside the immersion cavity, and the placement parts are immersed in the electrolyte.
[0009] In an optional embodiment, a second driving member is provided on the outside of the device body, and the output end of the second driving member is connected to the tray in a transmission connection. The second driving member drives the tray to rotate in a second direction.
[0010] The first direction is opposite to the second direction.
[0011] In an optional embodiment, the top of the device body is provided with a mounting port, the second driving member is disposed outside the device body, the output end of the second driving member is connected to a drive shaft, and the other end of the drive shaft passes through the mounting port and is connected to the tray.
[0012] In an optional embodiment, the tray includes at least two trays, which are connected to the drive shaft and spaced apart along the extension direction of the drive shaft, the drive shaft passing through the center of the at least two trays in sequence.
[0013] In an optional embodiment, the device body includes a lower cylinder and a cover, the cover being sealed to the opening of the lower cylinder, and the immersion chamber being provided inside the lower cylinder;
[0014] The mounting port is provided at the center of the cover, and the second driving member is provided above the cover.
[0015] In an optional embodiment, the bare cell immersion device further includes a negative pressure device. The top of the device body is provided with an opening, and the negative pressure device is connected to the opening. The negative pressure device is used to put the immersion chamber in a negative pressure state.
[0016] In an optional embodiment, the tray is provided with a plurality of rectangular openings, the placement part is provided with a rectangular slot for placing the bare battery cell, the plurality of placement parts are disposed at the bottom of the tray, and the plurality of rectangular slots are respectively connected to the plurality of rectangular openings;
[0017] The placement part has multiple openings, or the placement part has a mesh structure.
[0018] In an optional embodiment, the placement part is a clamping member used to clamp the bare battery cell.
[0019] In an optional embodiment, the device body includes a lower cylinder and a cover. The lower cylinder includes an inner cylinder and an outer cylinder. The inner cylinder is disposed inside the outer cylinder, and the immersion cavity is disposed inside the inner cylinder.
[0020] The cover is sealed to the outer cylinder;
[0021] The first driving member is disposed inside the outer cylinder and at the bottom of the inner cylinder. The output end of the driving member is connected to the bottom of the inner cylinder. The first driving member drives the inner cylinder to rotate around the first direction, so that the electrolyte in the immersion cavity rotates along the first direction.
[0022] In an optional embodiment, a pipe is provided between the inner cylinder and the outer cylinder, the inner cylinder is provided with a drain port, one end of the pipe is connected to the drain port, and the other end of the pipe passes through the outer cylinder and is connected to the electrolyte delivery device.
[0023] The beneficial effects of the bare battery cell wetting device provided in this embodiment of the present invention include:
[0024] By incorporating a first driving element within the device body, the first driving element drives the electrolyte within the immersion chamber to rotate along a first direction. Under the action of centrifugal force, the electrolyte continuously rotates in the same direction, allowing it to flow continuously and simultaneously and fully reflux and distribute evenly within multiple bare cells. This accelerates the immersion time of multiple bare cells simultaneously. Therefore, on the one hand, this configuration accelerates the immersion of bare cells and shortens the immersion time; on the other hand, it also ensures thorough immersion of the bare cells, improving the efficiency of immersion and reducing the complexity of the battery manufacturing process. Attached Figure Description
[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a first structural schematic diagram of the bare cell wetting device provided in this embodiment;
[0027] Figure 2 This is a first partial schematic diagram of the bare cell wetting device provided in this embodiment;
[0028] Figure 3 This is a schematic diagram of the second structure of the bare cell wetting device provided in this embodiment.
[0029] Icons: 010-Bare cell immersion device; 011-First direction; 012-Second direction; 100-Device body; 101-Immersion chamber; 110-Lower cylinder; 111-Inner cylinder; 112-Outer cylinder; 120-Cover; 200-First driving component; 300-Tray; 310-Rectangular opening; 320-Connecting rod; 400-Placement part; 500-Second driving component; 510-Drive shaft. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0033] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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 utility model.
[0034] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0035] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0036] The following describes in detail the overall structure, working principle, and technical effects of the bare cell immersion device 010 provided by this utility model through embodiments and in conjunction with the accompanying drawings.
[0037] Please refer to Figure 1 The bare battery cell wetting device 010 provided by this utility model is used to wet bare battery cells.
[0038] Please refer to Figure 1 The present invention provides a bare battery cell wetting device 010, comprising:
[0039] The device body 100 has an immersion chamber 101 inside, which is used to contain electrolyte. The device body 100 also has a first driving member 200 inside, which is used to drive the electrolyte in the immersion chamber 101 to rotate along the first direction 011.
[0040] The tray 300 has multiple placement parts 400, which are used to place bare battery cells. The tray 300 is placed in the immersion chamber 101, and the placement parts 400 are immersed in the electrolyte.
[0041] It is understandable that by setting a first driving member 200 inside the device body 100, the first driving member 200 drives the electrolyte in the immersion chamber 101 to rotate along the first direction 011. Under the action of centrifugal force, the electrolyte continuously rotates in the same direction, and the electrolyte continuously flows and can simultaneously and fully reflux and evenly distribute inside multiple bare cells, thereby accelerating the immersion time of multiple bare cells at the same time. Therefore, on the one hand, this setting can accelerate the immersion of bare cells and shorten the immersion time of bare cells. On the other hand, this setting can also fully immerse bare cells, improve the efficiency of immersion of bare cells, and reduce the complexity of battery manufacturing process.
[0042] In this embodiment, the bare cell immersion device 010 includes a device body 100.
[0043] In this embodiment, please refer to Figures 1-3 The device body 100 has an immersion chamber 101 inside, which is used to contain electrolyte. The device body 100 also has a first driving member 200 inside, which is used to drive the electrolyte in the immersion chamber 101 to rotate along the first direction 011.
[0044] In this embodiment, the device body 100 includes a lower cylinder 110 and a cover 120. The cover 120 is sealed to the opening of the lower cylinder 110, and the lower cylinder 110 is provided with an impregnation cavity 101.
[0045] In this embodiment, please refer to Figure 1 The lower cylinder 110 includes an inner cylinder 111 and an outer cylinder 112. The inner cylinder 111 is disposed inside the outer cylinder 112, and an impregnation chamber 101 is provided inside the inner cylinder 111. The cover 120 is sealed to the outer cylinder 112. The first driving member 200 is disposed inside the outer cylinder 112 and at the bottom of the inner cylinder 111. The output end of the driving member is connected to the bottom of the inner cylinder 111. The first driving member 200 drives the inner cylinder 111 to rotate around the first direction 011, so that the electrolyte in the impregnation chamber 101 rotates along the first direction 011.
[0046] Of course, in other embodiments, the first driving member 200 is disposed inside the outer cylinder 112 and at the bottom of the inner cylinder 111. The output shaft of the first driving member 200 passes through the bottom of the inner cylinder 111, and the output shaft of the first driving member 200 is sealed to the inner cylinder 111. A blade structure is provided inside the inner cylinder 111, and the blade structure is drively connected to the output shaft of the first driving member 200. It can be understood that the output shaft of the first driving member 200 drives the blade structure to rotate, and the blade structure drives the electrolyte in the immersion chamber 101 to rotate along the first direction 011.
[0047] Optionally, the first driving component 200 can be a structure such as a rotary motor.
[0048] In this embodiment, a pipe is provided between the inner cylinder 111 and the outer cylinder 112. The inner cylinder 111 is provided with a drain port. One end of the pipe is connected to the drain port, and the other end of the pipe passes through the outer cylinder 112 and is connected to the electrolyte conveying device.
[0049] The electrolyte delivery device can deliver or discharge electrolyte into the immersion chamber 101 via a pipeline.
[0050] Optionally, the electrolyte delivery device includes at least a delivery pump and a storage device for containing the electrolyte, the storage device being connected to a pipeline via the delivery pump.
[0051] In this embodiment, the bare cell immersion device 010 includes a tray 300.
[0052] In this embodiment, a plurality of placement parts 400 are provided on the tray 300. The placement parts 400 are used to place bare battery cells. The tray 300 is disposed in the immersion cavity 101, and the placement parts 400 are immersed in the electrolyte.
[0053] In this embodiment, please refer to Figures 1-3 The tray 300 is provided with multiple rectangular openings 310, and the placement part 400 is provided with a rectangular slot for placing bare battery cells. Multiple placement parts 400 are disposed at the bottom of the tray 300, and multiple rectangular slots are respectively connected to multiple rectangular openings 310.
[0054] The tray 300 has a circular structure with multiple rectangular openings 310 arranged at equal angles around the center of the tray 300. This arrangement allows for the placement of multiple bare battery cells, improving production efficiency.
[0055] Optionally, the placement section 400 may have multiple openings. The placement section 400 may also be a mesh structure. It is understood that flowing electrolyte can enter the placement section 400 through the openings or mesh to wet the bare battery cell, which can further improve the wetting effect.
[0056] Of course, in other embodiments, the placement part 400 can also be a clamping member, which is used to clamp the bare battery cell.
[0057] In one alternative embodiment, please refer to Figure 3 When the tray 300 is stationary relative to the device body 100, the tray 300 can be fixed to the bottom wall of the cover 120 via the connecting rod 320. One end of the connecting rod 320 is connected to the center of the bottom wall of the top cover, and the other end is connected to the center of the tray 300.
[0058] In one alternative embodiment, please refer to Figures 1-2 The tray 300 is in a non-stationary state relative to the device body 100. The device body 100 is provided with a second driving member 500 on its exterior. The output end of the second driving member 500 is connected to the tray 300 in a transmission manner. The second driving member 500 drives the tray 300 to rotate along the second direction 012. The first direction 011 is opposite to the second direction 012.
[0059] Optionally, if the first direction 011 is clockwise, then the second direction 012 is counterclockwise; if the first direction 011 is counterclockwise, then the second direction 012 is clockwise.
[0060] In this embodiment, the top of the device body 100 is provided with an installation port, the second drive member 500 is disposed outside the device body 100, the output end of the second drive member 500 is connected to a drive shaft 510, and the other end of the drive shaft 510 passes through the installation port and is connected to the tray 300.
[0061] The cover 120 has an installation port at its center, and the second drive component 500 is located above the cover 120.
[0062] Understandably, by setting the electrolyte and tray 300 to rotate in opposite directions, the wetting of the bare battery cells can be further accelerated.
[0063] Optionally, the second drive unit 500 can be a structure such as a motor.
[0064] Optionally, the pallet 300 includes at least two, and the at least two pallets 300 are connected to the drive shaft 510 and spaced apart along the extension direction of the drive shaft 510, with the drive shaft 510 passing through the center of the at least two pallets 300 in sequence.
[0065] In this embodiment, the bare cell immersion device 010 also includes a negative pressure device.
[0066] In this embodiment, the top of the device body 100 is provided with an opening, and the negative pressure device is connected to the opening. The negative pressure device is used to put the immersion chamber 101 in a negative pressure state.
[0067] The opening is located on the cover 120 of the device body 100.
[0068] Understandably, placing the wetting chamber 101 under negative pressure can expel the gas from the micropores of the bare battery cell's electrode, allowing the electrolyte to fill the micropores and improving the wetting effect.
[0069] The working principle and process of the bare battery cell wetting device 010 provided in this embodiment of the utility model are as follows:
[0070] The bare battery cells are manufactured and baked. After baking, the bare battery cells are immersed in water. After immersion, the bare battery cells are installed in the casing.
[0071] Furthermore, the bare battery cell impregnation process is as follows: multiple bare battery cells are placed in the rectangular groove of the placement part 400, and electrolyte is injected into the impregnation chamber 101 until the electrolyte submerges the bare battery cells. Subsequently, the cover 120 is connected and sealed to the outer cylinder 112, the first drive unit 200 is activated to make the electrolyte in the impregnation chamber 101 rotate in the first direction 011, and the second drive unit 500 is activated to make the tray 300 drive the bare battery cells to rotate in the second direction 012.
[0072] In summary, the bare cell immersion device 010 provided in this embodiment of the present invention, by setting a first driving member 200 in the device body 100, drives the electrolyte in the immersion chamber 101 to rotate along the first direction 011. Under the action of centrifugal force, the electrolyte continuously rotates in the same direction, and the electrolyte continuously flows and can simultaneously and fully reflux and evenly distribute inside multiple bare cells, thereby accelerating the immersion time of multiple bare cells at the same time. Therefore, on the one hand, this setting can accelerate the immersion of bare cells and shorten the immersion time of bare cells. On the other hand, this setting can also fully immerse bare cells, improve the efficiency of immersion of bare cells, and reduce the complexity of battery manufacturing process.
[0073] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.
Claims
1. A bare battery cell immersion device, characterized in that, include: The device body has an immersion cavity inside for containing electrolyte. The device body also has a first driving member for driving the electrolyte in the immersion cavity to rotate in a first direction. The tray has multiple placement sections for placing bare battery cells. The tray is placed inside the immersion cavity, and the placement sections are immersed in the electrolyte.
2. The bare cell immersion apparatus according to claim 1, characterized in that, The device body is provided with a second driving member on its exterior. The output end of the second driving member is connected to the tray in a transmission manner. The second driving member drives the tray to rotate in a second direction. The first direction is opposite to the second direction.
3. The bare cell immersion apparatus according to claim 2, characterized in that, The top of the device body is provided with a mounting port, the second driving component is disposed outside the device body, the output end of the second driving component is connected to a drive shaft, and the other end of the drive shaft passes through the mounting port and is connected to the tray.
4. The bare cell immersion apparatus according to claim 3, characterized in that, The tray includes at least two trays, which are connected to the drive shaft and spaced apart along the extension direction of the drive shaft. The drive shaft passes through the center of the at least two trays in sequence.
5. The bare cell immersion apparatus according to claim 3, characterized in that, The device body includes a lower cylinder and a cover, the cover being sealed to the opening of the lower cylinder, and the immersion chamber being provided inside the lower cylinder; The mounting port is provided at the center of the cover, and the second driving member is provided above the cover.
6. The bare cell immersion apparatus according to claim 1, characterized in that, The bare cell immersion device also includes a negative pressure device. The top of the device body is provided with an opening, and the negative pressure device is connected to the opening. The negative pressure device is used to keep the immersion chamber under negative pressure.
7. The bare cell immersion apparatus according to claim 1, characterized in that, The tray has multiple rectangular openings, and the placement part has a rectangular slot for placing the bare battery cell. The multiple placement parts are disposed on the bottom of the tray, and the multiple rectangular slots are respectively connected to the multiple rectangular openings. The placement part has multiple openings, or the placement part has a mesh structure.
8. The bare cell immersion apparatus according to claim 1, characterized in that, The placement part is a clamping member, which is used to clamp the bare battery cell.
9. The bare cell immersion apparatus according to claim 1, characterized in that, The device body includes a lower cylinder and a cover. The lower cylinder includes an inner cylinder and an outer cylinder. The inner cylinder is disposed inside the outer cylinder, and the wetting cavity is disposed inside the inner cylinder. The cover is sealed to the outer cylinder; The first driving member is disposed inside the outer cylinder and at the bottom of the inner cylinder. The output end of the driving member is connected to the bottom of the inner cylinder. The first driving member drives the inner cylinder to rotate around the first direction, so that the electrolyte in the immersion cavity rotates along the first direction.
10. The bare cell immersion apparatus according to claim 9, characterized in that, A pipe is provided between the inner cylinder and the outer cylinder. The inner cylinder is provided with a drain port. One end of the pipe is connected to the drain port, and the other end of the pipe passes through the outer cylinder and is connected to the electrolyte delivery device.