Vacuum infiltration device for battery liquid injection

Abstract

The utility model provides a battery liquid injection vacuum infiltration device which comprises a box body and a cover body, the box body is provided with a first opening end, a plurality of accommodating grooves are formed in the box body, the accommodating grooves are mutually independent, the cover body and the box body can be mutually buckled to seal the first opening end, a through hole is formed in the cover body, and the through hole is communicated with vacuumizing equipment through a gas guide pipe; the packaging box further comprises a sealing structure which is arranged at the first opening end and used for forming a closed space in the box body when the cover body and the box body are buckled with each other. By arranging the box body with the multiple containing grooves, the containing grooves can be used for containing and supporting the soft package battery to be filled with liquid, the sealing structure is arranged so that after the cover body and the box body are buckled with each other, a sealed space can be formed in the box body, meanwhile, air in the box body is pumped out through the through hole by using external vacuumizing equipment, and vacuum is formed in the box body; compared with a traditional mode of standing after manual electrolyte injection, the vacuum environment is beneficial to improving the infiltration effect of the battery cell in the electrolyte, the infiltration time is shortened, and the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of batteries, in particular to a vacuum infiltration device for battery liquid injection. BACKGROUND

[0002] Global warming and technological development promote the rise of new energy, and batteries are widely used in various industries. The research on batteries is more comprehensive. Domestic enterprises mainly test single battery cells in basic research on lithium-ion batteries. The most commonly used batteries in the research are cylindrical batteries and soft package batteries, which are widely used in 3C consumer electronics, new energy vehicles and power batteries.

[0003] The research on batteries is mainly manual operation from battery baking, liquid injection to battery performance testing. The current conventional liquid injection method mainly includes two kinds. One is to use a special vacuum liquid injection machine. Although the liquid injection precision is high, the operation control is complicated, and the equipment is expensive, so it is difficult to be applied to most scenes. The other way is to manually inject electrolyte into the battery, and then wait for the battery to completely infiltrate the electrode. However, the infiltration effect of this method is poor. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to solve the above problems, and provide a vacuum infiltration device for battery liquid injection, comprising:

[0005] A box body has a first open end, and a plurality of accommodating grooves are arranged in the box body, and the plurality of accommodating grooves are independent of each other.

[0006] A cover body is detachably connected with the box body to seal the first open end, and a through hole is arranged on the cover body, and the through hole is connected with a vacuum pumping device through a gas guide pipe.

[0007] A sealing structure is arranged at the first open end, and the sealing structure is used to form a closed space in the box body when the cover body and the box body are detachably connected.

[0008] According to the technical scheme provided by some embodiments of the present application, the sealing structure comprises a first sealing ring and a second sealing ring, a sealing groove is arranged at the first open end, the first sealing ring is arranged in the sealing groove, and the free end of the first sealing ring extends out of the sealing groove from the groove opening of the sealing groove, and the second sealing ring surrounds the first open end, and the free end of the second sealing ring extends along the circumference of the first open end.

[0009] According to the technical scheme provided by some embodiments of the present application, the box body comprises a shell, the shell has the first open end, a bottom plate is arranged in the shell, the shell is connected with the bottom plate through a plurality of elastic members, and a detection member is arranged between the shell and the bottom plate, and the detection member is used to detect the weight of the object carried by the bottom plate.

[0010] According to the technical scheme provided by some embodiments of the present application, the box body further comprises a grid, the inner wall of the shell is provided with a mounting groove, the grid is provided with a protruding part, the protruding part can be placed in the mounting groove to make the grid and the shell in sliding connection, and the shell and the grid jointly form a plurality of the accommodation grooves.

[0011] According to the technical scheme provided by some embodiments of the present application, the box body is provided with a plurality of buckles, the cover body is provided with a plurality of hooks corresponding to the buckles, and the buckles can be clamped with the hooks to make the box body and the cover body fixedly buckled.

[0012] According to the technical scheme provided by some embodiments of the present application, the through hole is further communicated with a control valve, and the control valve is used to control the opening and closing of the air path between the through hole and the air guide pipe.

[0013] According to the technical scheme provided by some embodiments of the present application, the cover body is made of a visually transparent material.

[0014] According to the technical scheme provided by some embodiments of the present application, the cover body is further provided with a pressure gauge, and the pressure gauge is used to monitor the air pressure in the box body when the cover body and the box body are buckled with each other.

[0015] According to the technical scheme provided by some embodiments of the present application, the shell is provided with a display screen, and the display screen is electrically connected with the detection piece.

[0016] Compared with the prior art, the present application has the beneficial effects: the present application provides a vacuum infiltration device for battery liquid injection, which comprises a box body and a cover body, the box body has a first opening end, and a plurality of accommodation grooves are arranged in the box body, the plurality of accommodation grooves are independent of each other, the cover body can be buckled with the box body to close the first opening end, the cover body is provided with a through hole, and the through hole is communicated with a vacuumizing device through an air guide pipe; further comprising a sealing structure arranged at the first opening end, which is used to form a sealed space in the box body when the cover body and the box body are buckled with each other; by arranging the box body with a plurality of accommodation grooves, the accommodation grooves can be used to hold the soft package battery supporting the liquid to be injected, and by arranging the sealing structure, a sealed space is formed in the box body after the cover body and the box body are buckled with each other, and the internal air of the box body is extracted through the through hole by using an external vacuumizing device, so that a vacuum is formed in the box body. Compared with the traditional manual injection and standing method, the vacuum environment is beneficial to improve the infiltration effect of the battery cell in the electrolyte, shorten the infiltration time and improve the efficiency.

[0017] It should be understood that the description of technical features, technical solutions, advantages or similar language in the present application does not imply that all features and advantages can be realized in any single embodiment. On the contrary, it can be understood that the description of a feature or advantage means that the specific technical feature, technical solution or advantage is included in at least one embodiment. Therefore, the description of technical features, technical solutions or advantages in the specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and advantages described in the embodiments can be combined in any appropriate manner. Those skilled in the art will understand that the embodiments can be implemented without one or more specific technical features, technical solutions or advantages of a specific embodiment. In other embodiments, additional technical features and advantages can be identified in specific embodiments that do not embody all embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings from these drawings without creative labor.

[0019] Figure 1 A structural schematic diagram of a box body of a battery liquid injection vacuum infiltration device provided by the embodiments of the present application;

[0020] Figure 2 A structural schematic diagram of a cover body of a battery liquid injection vacuum infiltration device provided by the embodiments of the present application;

[0021] Figure 3 A cross-sectional schematic diagram of a battery liquid injection vacuum infiltration device provided by the embodiments of the present application;

[0022] Figure 4 A cross-sectional schematic diagram of a box body of a battery liquid injection vacuum infiltration device provided by the embodiments of the present application;

[0023] The text annotations in the figure represent:

[0024] 1, box body; 2, cover body; 3, first sealing ring; 4, second sealing ring; 5, elastic member; 6, detection member; 7, control valve; 8, pressure gauge; 9, display screen; 11, containing groove; 12, shell; 13, bottom plate; 14, grid; 15, mounting groove; 16, protruding part; 17, buckle; 18, sliding groove; 19, strip plate; 20, clamping groove; 21, hook. DETAILED DESCRIPTION

[0025] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The descriptions in this section are merely illustrative and explanatory, and should not be construed as limiting the scope of protection of this application. Specifically, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the scope of protection of this invention.

[0026] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0027] As mentioned in the background section, in order to solve the problems existing in the prior art, this embodiment provides a vacuum impregnation device for battery electrolyte filling, comprising:

[0028] The box body 1 has a first open end and has multiple receiving slots 11 inside, which are independent of each other.

[0029] The cover 2 can be interlocked with the box 1 to close the first opening end. The cover 2 has a through hole, which is connected to the vacuum equipment through the air guide tube.

[0030] A sealing structure is provided at the first opening end, which is used to form a sealed space inside the box 1 when the cover 2 and the box 1 are fastened together.

[0031] like Figures 1-3 As shown, the box body 1 is approximately a cuboid structure with a first open end. It has multiple independent receiving slots 11 inside, which can be connected to the outside through the first open end. The cover 2 is approximately a rectangular planar structure with a bent part on its circumferential edge. The cover 2 can close the first open end of the box body 1 and is fastened to the box body 1 to form a sealed space inside the box body 1. The vacuuming device can be an air pump in the prior art. The air pump is connected to the through hole through the air guide pipe and can extract the air inside the box body 1 to make the inside of the box body 1 a vacuum environment. The sealing structure is set at the first open end, which can keep the internal space of the box body 1 sealed when the cover 2 is fastened to the box body 1, and prevent air from entering the inside of the box body 1 from the connection between the cover 2 and the box body 1 during the vacuuming process.

[0032] In use, multiple unfilled soft-pack batteries are placed into multiple receiving slots 11 in sequence, and electrolyte is injected into the soft-pack batteries in sequence through the first opening. After all the batteries are injected, the cover 2 is sealed at the first opening and fastened to the box 1. At the same time, the air inside the box 1 is extracted by an external vacuum device to create a vacuum environment inside the box 1, and the battery cells are allowed to soak completely.

[0033] By setting a box 1 with multiple receiving slots 11, the receiving slots 11 can be used to hold and support the soft-pack battery to be injected with electrolyte. The sealing structure allows the cover 2 and the box 1 to be interlocked, forming a sealed space inside the box 1. At the same time, an external vacuum pump is used to extract the air inside the box 1 through the through hole, creating a vacuum inside. Compared with the traditional method of manually injecting electrolyte and then letting it stand, the vacuum environment is beneficial to improve the wetting effect of the battery cell in the electrolyte, shorten the wetting time, and improve efficiency.

[0034] In a preferred embodiment, the box body 1 includes an outer shell 12, the outer shell 12 has a first open end, a bottom plate 13 is provided inside the outer shell 12, the outer shell 12 is connected to the bottom plate 13 by a plurality of elastic members 5, and a detection member 6 is also provided between the outer shell 12 and the bottom plate 13, the detection member 6 is used to detect the weight of the object carried by the bottom plate 13.

[0035] like Figure 3 As shown, the outer shell 12 is a cuboid shell, and the bottom plate 13 is a rectangular planar structure. The bottom plate 13 and the inner wall of the bottom of the outer shell 12 are connected by multiple elastic elements 5. The elastic elements 5 are springs in the prior art. The elastic elements 5 can be set in the dead corners of the bottom plate 13, or they can be adjusted according to the actual situation to ensure that the bottom plate 13 is in a horizontal state when it is stationary without external force. No special limitation is made here. There is a gap between the edge of the bottom plate 13 and the inner wall of the outer shell 12 to avoid friction between the bottom plate 13 and the inner wall of the outer shell 12 when the bottom plate 13 moves in the vertical direction. The detection element 6 is a pressure sensor in the prior art, which is used to monitor the amount of electrolyte injected into the battery during the battery electrolyte injection process.

[0036] In a preferred embodiment, the sealing structure includes a first sealing ring 3 and a second sealing ring 4. A sealing groove is provided at the first open end. The first sealing ring 3 is disposed in the sealing groove, and its free end extends out of the sealing groove from the opening of the sealing groove. The second sealing ring 4 is disposed around the first open end, and the free end of the second sealing ring 4 extends circumferentially along the first open end.

[0037] like Figure 3As shown, the sealing groove is formed on the side wall at the first opening end of the outer shell 12. The groove opening direction is the same as the opening direction of the first opening end. The first sealing ring 3 and the second sealing ring 4 are both made of butyl rubber. Butyl rubber sealing strips have good airtightness and are widely used in vacuum equipment. The first sealing ring 3 is located in the sealing groove, its bottom is bonded and fixed to the sealing groove, and its top extends out of the sealing groove from the groove opening. The second sealing ring 4 is fixed to the outer wall of the outer shell 12 around the first opening end, and its free end extends circumferentially along the first opening end. When the cover 2 is fastened to the box 1, the free end of the first sealing ring 3 can abut against the planar structure of the cover 2, and the second sealing ring 4 can abut against the bent part of the cover 2. By setting the first sealing ring 3 and the second sealing ring 4, a double seal is achieved, which can effectively improve the stability of the vacuum environment inside the box 1 after evacuation and prevent gas from entering the inside of the box 1 from the connection between the cover 2 and the box 1.

[0038] In a preferred embodiment, the box body 1 further includes a grille 14, and an installation groove 15 is provided on the inner wall of the outer shell 12. The grille 14 has a protrusion 16, which can be placed in the installation groove 15 so that the grille 14 and the outer shell 12 are slidably connected. The outer shell 12 and the grille 14 together form a plurality of receiving grooves 11.

[0039] like Figure 3 As shown, in this embodiment, four mounting slots 15 are provided on the outer shell 12 along its own height direction. The four mounting slots 15 are respectively located in the middle of the four inner sidewalls of the outer shell 12, and the top of the mounting slot 15 has a second opening end. The grille 14 is composed of multiple strip plates 19 extending along the length and width directions of the outer shell 12. The two ends of the strip plates 19 corresponding to the positions of the mounting slots 15 have protrusions 16. By aligning each protrusion 16 with the second opening end of the mounting slot 15, the protrusion 16 can slide into the mounting slot from the second opening end. The grid 14 is installed in the slot 15, thereby splicing and fixing the grid 14 to the outer shell 12. Furthermore, after the grid 14 is installed in place on the outer shell 12, there is also a gap between its bottom and the base plate 13 to avoid the grid 14 interfering with the base plate 13. By adjusting the number and relative position of the strip plates 19, grids 14 with different sized receiving slots 11 can be formed. At the same time, the grid 14 can be disassembled and replaced through the mounting slot 15, so that the box 1 can be used for soft-pack batteries of different sizes, further improving the flexibility of the vacuum impregnation device.

[0040] like Figure 4As shown in other embodiments of this application, each of the four inner sidewalls of the outer casing 12 is provided with a horizontally extending groove 17. The grooves 17 on the two inner sidewalls in the length direction are higher than the grooves 17 on the two inner sidewalls in the width direction. The bottom of the groove 17 is connected to a plurality of vertically extending snap-fit ​​grooves. The two ends of the plurality of strip plates 19 are provided with protrusions 16, which are respectively provided in the outer casing 12 along the length and width directions. The protrusions 16 at both ends of the strip plates 19 are respectively provided in the corresponding grooves 18. The plurality of strip plates 19 along the length and width directions of the outer casing 12 surround each other to form a receiving groove 11. By simultaneously sliding the plurality of strip plates 19 along the length and width directions of the outer casing 12 in their corresponding grooves 18, the size of the receiving groove 11 can be adjusted to accommodate batteries of different specifications. By placing the protrusions 16 at both ends of the strip plates 19 in the snap-fit ​​grooves, the strip plates 19 can be fixed relative to the outer casing 12.

[0041] In a preferred embodiment, the outer periphery of the box body 1 is provided with a plurality of buckles 17, and the cover body 2 is provided with a plurality of hooks 21 corresponding to the buckles 17. The buckles 17 can be engaged with the hooks 21 to fasten and fix the box body 1 and the cover body 2.

[0042] like Figure 1 and Figure 2 As shown, multiple buckles 17 are provided on the outside of the four side walls of the box body 1, and hooks 21 are provided on the cover body 2 corresponding to the buckles 17. By closing the cover body 2 at the first opening end, and then engaging the buckles 17 with the hooks 21, the box body 1 and the cover body 2 can be fastened and fixed.

[0043] In a preferred embodiment, a control valve 7 is also connected to the through hole, and the control valve 7 is used to control the opening and closing of the air passage between the through hole and the air guide tube.

[0044] like Figure 2 As shown, the control valve 7 is a pressure regulating valve in the prior art. The control valve 7 is located at the through hole and can be connected to the through hole and the air guide pipe respectively. When it is necessary to evacuate the inside of the box 1, the control valve 7 is opened and the vacuum equipment is started to extract the air inside the box 1 through the air guide pipe. After the evacuation is completed, the control valve 7 and the vacuum equipment are closed to keep the inside of the box 1 in a vacuum environment.

[0045] In a preferred embodiment, the cover 2 is made of a visible transparent material.

[0046] In a preferred embodiment, the cover 2 is further provided with a pressure gauge 8, which is used to monitor the air pressure inside the box 1 when the cover 2 and the box 1 are fastened together.

[0047] like Figure 2As shown, pressure gauge 8 is installed on cover 2, which can monitor the air pressure inside box 1 when cover 2 is fastened and fixed to box 1. Cover 2 can be made of transparent acrylic material. The wettability of the battery cells inside box 1 can be observed at any time through the visible transparent cover 2. At the same time, combined with the current internal pressure of box 1 detected by pressure gauge 8, the internal pressure of box 1 can be adjusted in time through control valve 7 to ensure the wettability of battery cells.

[0048] In a preferred embodiment, the housing 12 is provided with a display screen 9, which is electrically connected to the detection element 6.

[0049] like Figure 1 As shown, the display screen 9 is a touch-sensitive digital display screen 9, which is located on the outer wall of the housing 12 and is electrically connected to the detection element 6 through a wire. It can convert the pressure signal detected by the detection element 6 into a weight value and display it, so that the operator can observe the electrolyte injection volume at any time and ensure the immersion quality of the battery.

[0050] Working principle: In use, firstly, select a grid 14 that matches the specifications of the battery to be injected and install it on the outer casing 12. Then, place multiple unfilled soft-pack batteries into multiple receiving slots 11 in sequence. Inject electrolyte into the soft-pack batteries sequentially through the first opening end, and monitor the electrolyte injection volume through the display screen 9. After all the electrolyte is injected, close the cover 2 at the first opening end, and make the buckle 17 and hook 21 engage to fix the cover 2 and the box 1. At the same time, use an external vacuum pump to extract the air inside the box 1, so that a vacuum environment is formed inside the box 1. Observe the cell immersion through the cover 2, and monitor and adjust the pressure inside the box 1 at any time with the pressure gauge 8 and control valve 7 until the cell immersion is complete.

[0051] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A vacuum impregnation device for battery electrolyte filling, characterized in that, include: The box body (1) has a first open end and has a plurality of receiving slots (11) inside, the plurality of receiving slots (11) being independent of each other; The cover (2) can be fastened to the box (1) to close the first opening end. The cover (2) has a through hole, which is connected to a vacuum device through a gas guide pipe. A sealing structure is provided at the first opening end, which is used to form a sealed space inside the box (1) when the cover (2) and the box (1) are fastened together.

2. The vacuum impregnation device for battery electrolyte filling according to claim 1, characterized in that, The sealing structure includes a first sealing ring (3) and a second sealing ring (4). A sealing groove is provided at the first open end. The first sealing ring (3) is located in the sealing groove, and its free end extends out of the sealing groove from the opening of the sealing groove. The second sealing ring (4) is arranged around the first open end, and the free end of the second sealing ring (4) extends circumferentially along the first open end.

3. The vacuum impregnation device for battery electrolyte filling according to claim 1, characterized in that, The box body (1) includes an outer shell (12), the outer shell (12) has the first open end, the outer shell (12) is provided with a bottom plate (13), the outer shell (12) is connected to the bottom plate (13) through a plurality of elastic elements (5), and a detection element (6) is also provided between the outer shell (12) and the bottom plate (13), the detection element (6) is used to detect the weight of the object carried by the bottom plate (13).

4. The vacuum impregnation device for battery electrolyte filling according to claim 3, characterized in that, The box body (1) also includes a grille (14), and an installation groove (15) is provided on the inner wall of the outer shell (12). The grille (14) has a protrusion (16), which can be placed in the installation groove (15) so that the grille (14) and the outer shell (12) are slidably connected. The outer shell (12) and the grille (14) together form a plurality of receiving grooves (11).

5. The vacuum impregnation device for battery electrolyte filling according to claim 1, characterized in that, The outer periphery of the box body (1) is provided with multiple buckles (17), and the cover body (2) is provided with multiple hooks (21) corresponding to the buckles (17). The buckles (17) can be engaged with the hooks (21) to make the box body (1) and the cover body (2) fastened and fixed.

6. The vacuum impregnation device for battery electrolyte filling according to claim 1, characterized in that, A control valve (7) is also connected to the through hole, and the control valve (7) is used to control the opening and closing of the air passage between the through hole and the air guide pipe.

7. The vacuum impregnation device for battery electrolyte filling according to claim 1, characterized in that, The cover (2) is made of a visible transparent material.

8. The vacuum impregnation device for battery electrolyte filling according to claim 1, characterized in that, The cover (2) is also provided with a pressure gauge (8), which is used to monitor the air pressure inside the box (1) when the cover (2) and the box (1) are fastened together.

9. The vacuum impregnation device for battery electrolyte filling according to claim 3, characterized in that, The outer casing (12) is provided with a display screen (9), which is electrically connected to the detection component (6).

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