Electrolyte infiltration device and battery cell production line

Abstract

The utility model belongs to the technical field of battery manufacturing, and discloses an electrolyte infiltration device and a battery cell production line. The electrolyte infiltrating device comprises an infiltrating bin, a heating assembly and a battery cell clamping assembly, and the infiltrating bin is internally used for placing a battery cell; the heating assembly is arranged on the inner side of the infiltration bin, and the heating assembly is configured to heat the battery cell; the battery cell clamping assembly comprises a base, two sliding pieces and two clamping pieces, the base is connected with the bottom of the infiltration bin, the two sliding pieces and the base are in sliding fit in the preset direction, the two clamping pieces and the two sliding pieces are detachably arranged in a one-to-one correspondence mode, the clamping pieces are matched with the appearance of the battery cell, and the two sliding pieces are elastically connected. According to the electrolyte infiltration device and the battery cell production line, the electrolyte infiltration speed can be increased, the battery cell standing time can be shortened, and meanwhile, the electrolyte infiltration device and the battery cell production line can be adapted to battery cells in different shapes.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to an electrolyte wetting device and a battery cell production line. Background Technology

[0002] Lithium ions, as the active material in batteries, store and release energy through ion transfer during charging and discharging. Lithium-ion batteries have many advantages, such as high energy density, long cycle life, and high discharge rate. Therefore, they are widely used in portable electronic devices (such as mobile phones and laptops), power tools, electric vehicles, and other fields. The battery cell is the internal active structure of a pouch / prismatic / cylindrical battery, composed of a positive electrode, a negative electrode, and a separator. After the cell is installed, electrolyte needs to be injected into the battery. Electrolyte injection is a crucial step in the manufacturing process of pouch / prismatic / cylindrical batteries. The electrolyte plays a role in electron transport in lithium batteries. In current manufacturing methods, after electrolyte injection, the battery needs to be left to stand for 35-40 minutes to allow the electrolyte to fully penetrate. The slow penetration rate and long standing time significantly slow down battery production efficiency. Furthermore, existing penetration devices cannot accommodate battery cells of different shapes.

[0003] Therefore, there is an urgent need to design an electrolyte wetting device and a battery cell production line to solve the above problems. Utility Model Content

[0004] One objective of this invention is to provide an electrolyte wetting device that can improve the electrolyte wetting speed, shorten the cell settling time, and adapt to the use of cells of different shapes.

[0005] Another objective of this invention is to provide a battery cell production line that can shorten the battery cell settling time, thereby shortening the battery cell manufacturing time, and can also be adapted to the use of battery cells of different shapes.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Electrolyte wetting device, comprising:

[0008] The impregnation chamber is used to hold the battery cells.

[0009] A heating element is disposed inside the aforementioned immersion chamber, and the aforementioned heating element is configured to heat the aforementioned battery cell;

[0010] The cell clamping assembly comprises a base, two sliding members and two clamping members. The base is connected to the bottom of the soaking chamber. The two sliding members are in sliding fit with the base in a preset direction. The two clamping members are correspondingly detachably arranged with the two sliding members. The clamping members are adapted to the shape of the cell. The two sliding members are elastically connected.

[0011] As an optional solution, the heating assembly comprises:

[0012] The heating member is arranged on the inner side wall of the soaking chamber.

[0013] The heat preservation member is arranged on the side of the heating member away from the inner side wall of the soaking chamber.

[0014] As an optional solution, the surface of the heating member is provided with a buffer protection layer.

[0015] As an optional solution, the buffer protection layer is made of any one of glass, ceramic or resin.

[0016] As an optional solution, the heating member is a thermistor.

[0017] As an optional solution, the base is in T shape and comprises:

[0018] The mounting portion is connected to the bottom of the soaking chamber.

[0019] The guiding portion is connected to the end of the mounting portion away from the bottom of the soaking chamber. The guiding portion extends along the preset direction and is provided with a limiting slot extending along the preset direction.

[0020] The middle part of the guiding portion is provided with a connecting portion. The cell clamping assembly further comprises two elastic members. The two elastic members are respectively connected to the two sides of the connecting portion and are limited in the limiting slot. The end of each elastic member away from the connecting portion is connected with one sliding member; or

[0021] The middle part of the guiding portion is provided with a connecting portion. The cell clamping assembly further comprises an elastic member. The middle part of the elastic member is connected to the connecting portion and is limited in the limiting slot. The two sliding members are respectively connected to the two ends of the elastic member.

[0022] As an optional solution, the electrolyte soaking device further comprises a power mechanism. The power mechanism comprises:

[0023] The rotating member is connected to the output end of the driving member. The driving member can drive the rotating member to rotate in the vertical direction.

[0024] The bearing part is arranged in vertical direction with the rotating part, and the rotating part and the bearing part are connected by at least two outer rotating shafts, the two ends of the outer rotating shaft are respectively pivoted with the rotating part and the bearing part, the at least two outer rotating shafts are on a circumference, the circumference takes the rotating center of the rotating part as the center, the soaking bin is arranged corresponding to the outer rotating shaft, and the base is connected with the outer rotating shaft.

[0025] The outer gear is coaxially fixed on each outer rotating shaft.

[0026] The fixed part is simultaneously engaged with the at least two outer gears and kept static when the rotating part rotates.

[0027] As an optional solution, the fixed part is arranged at the rotating center of the rotating part and is provided with a ring of engagement teeth on the outer periphery, and each outer gear is partially engaged with the ring of engagement teeth.

[0028] As an optional solution, the fixed part is annular and is provided with a ring of engagement teeth on the inner side, and each outer gear is partially engaged with the ring of engagement teeth.

[0029] The electric core production line comprises a liquid injection device and the electrolyte soaking device, and the electrolyte soaking device is located upstream of the liquid injection device.

[0030] The electric core production line comprises a liquid injection device and the electrolyte soaking device, and the electrolyte soaking device is located upstream of the liquid injection device.

[0031] The electrolyte soaking device provided by the utility model has the advantages that the heating assembly is arranged on the inner side of the soaking bin, the inside of the soaking bin is heated during electrolyte soaking after liquid injection, the ambient temperature is increased during electrolyte soaking, the flow of electrolyte is accelerated, the electrolyte soaking speed is accelerated, and the soaking time is shortened.

[0032] The utility model also provides an electric core production line which comprises a liquid injection device and the electrolyte soaking device, and the electrolyte soaking device is located upstream of the liquid injection device. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 Fig. 1 is a top view of the soaking bin provided by the utility model embodiment;

[0034] Figure 2 isFigure 1 Cross-sectional view at A-A;

[0035] Figure 3 is a structural schematic view of the battery cell clamping assembly provided by the embodiment of the present application;

[0036] Figure 4 is a cross-sectional view of the battery cell clamping assembly at the position of the sliding member provided by the embodiment of the present application;

[0037] Figure 5 is a cross-sectional view of the battery cell clamping assembly at the position of the elastic member provided by the embodiment of the present application;

[0038] Figure 6 is a structural schematic view of the electrolyte infiltrating device provided by the embodiment of the present application.

[0039] In the figure:

[0040] 10, infiltrating bin; 200, battery cell;

[0041] 20, heating assembly; 21, heating member; 22, heat preservation member;

[0042] 30, battery cell clamping assembly; 31, base; 311, mounting portion; 312, guide portion; 3121, limiting groove; 313, connecting portion; 32, sliding member; 33, clamping member; 34, elastic member;

[0043] 40, power mechanism; 41, rotating member; 42, driving member; 43, bearing member; 44, outer rotating shaft; 45, outer gear; 46, fixing member. DETAILED DESCRIPTION

[0044] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0045] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.Moreover, first feature "on", "above" and "upper surface" of second feature includes that first feature is directly above and obliquely above second feature, or only indicates that the horizontal height of first feature is higher than second feature.First feature "under", "below" and "lower surface" of second feature includes that first feature is directly below and obliquely below second feature, or only indicates that the horizontal height of first feature is less than second feature.

[0047] In the description of the embodiment, the orientation or position relationship of the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0048] The embodiment provides an electrolyte infiltration device, which can improve the speed of electrolyte infiltration, shorten the standing time of the battery cell 200, and adapt to the use of battery cells 200 of different shapes. Figures 1-4 As shown in the figure, the electrolyte infiltration device comprises an infiltration bin 10, a heating assembly 20 and a battery cell clamping assembly 30, the inside of the infiltration bin 10 is used for placing the battery cell 200; the heating assembly 20 is arranged on the inside of the infiltration bin 10, and the heating assembly 20 is configured to heat the battery cell 200; the battery cell clamping assembly 30 comprises a base 31, two sliding pieces 32 and two clamping pieces 33, the base 31 is connected with the bottom of the infiltration bin 10, the two sliding pieces 32 are in sliding fit with the base 31 in a preset direction, and the two clamping pieces 33 are correspondingly detachably arranged with the two sliding pieces 32, the clamping piece 33 is adapted to the shape of the battery cell 200, and the two sliding pieces 32 are elastically connected.

[0049] The electrolyte infiltration device described above, by arranging the heating assembly 20 on the inside of the infiltration bin 10, the inside of the infiltration bin 10 is heated during the electrolyte infiltration process after liquid injection is completed, the ambient temperature during the electrolyte infiltration process is improved, thereby accelerating the flow of electrolyte, thereby accelerating the speed of electrolyte infiltration and shortening the infiltration time; at the same time, since the clamping piece 33 and the sliding piece 32 are detachably arranged, different shapes of clamping pieces 33 can be replaced to adapt to the elastic clamping of battery cells 200 of different shapes, therefore, the electrolyte infiltration device can adapt to cylindrical battery cells, square battery cells and soft package battery cells, and has stronger compatibility.

[0050] Optionally, as shown in the figure, Figure 2As shown, the heating assembly 20 comprises a heating piece 21 arranged on the inner side wall of the infiltration bin 10 and a heat preservation piece 22 arranged on the side of the heating piece 21 away from the inner side wall of the infiltration bin 10. The heat preservation piece 22 has a heat preservation effect on the infiltration bin 10 to prevent the heat from dissipating quickly. The heat preservation piece 22 can be heat preservation foam.

[0051] Optionally, the heating piece 21 is a PTC (Positive Temperature Coefficient, thermistor) capable of achieving a faster heating effect. Further, as shown, Figure 2 The PTC is arranged in multiple turns along the axial direction on the inner side of the infiltration bin 10 to ensure the uniform heating in the infiltration bin 10.

[0052] The temperature sensor is in communication connection with the PTC. The temperature control range for suitable electrolyte infiltration is 25-45℃. The temperature sensor monitors the temperature in the infiltration bin 10 in real time, and the PTC can flexibly adjust the infiltration temperature according to actual needs.

[0053] Optionally, the surface of the heating piece 21 is provided with a buffer protection layer. The buffer protection layer can isolate air and prevent oxidation and corrosion, thereby prolonging the service life of the heating piece 21.

[0054] Optionally, the buffer protection layer is made of any one of glass, ceramic or resin. The above materials are easy to obtain, low in cost and good in isolation effect.

[0055] Optionally, as shown in Figure 2 and Figure 3 The base 31 is in T shape and comprises a mounting portion 311 connected with the bin bottom of the infiltration bin 10 and a guide portion 312 connected with the end of the mounting portion 311 away from the bin bottom. The guide portion 312 extends along a preset direction and is provided with a limiting groove 3121 extending along the preset direction. The middle portion of the guide portion 312 is provided with a connecting portion 313. The cell clamping assembly 30 further comprises two elastic members 34 connected with the two sides of the connecting portion 313 and limited in the limiting groove 3121. One sliding member 32 is connected with the end of each elastic member 34 away from the connecting portion 313. Through the above arrangement, the limiting groove 3121 can prevent the elastic member 34 from coming out and provide a guiding effect for the sliding of the sliding member 32. When the cell 200 is not clamped, the elastic member 34 is in a natural state. When the cell 200 is clamped, the elastic member 34 is stretched due to the large size of the cell 200, so that the two clamping members 33 clamp the cell 200.

[0056] In the embodiment, as shown in Figure 5As shown, the limiting groove 3121 is divided into a cylindrical part and a square part, the size of the square part in the width direction of the limiting groove 3121 is smaller than the diameter of the cylindrical part, thereby preventing the elastic member 34 from being pulled out of the limiting groove 3121.

[0057] In other embodiments, in order to facilitate the installation and connection of the elastic member 34, the diameter of the cylindrical part is consistent with or smaller than the size of the square part, the elastic member 34 can be lowered from the top, and then a sealing plate is installed on the top, it should be noted that the sealing plate must be able to avoid the sliding track of the sliding member 32. Among them, the connection mode of the two ends of the elastic member 34 can be selected from bonding, locking screw connection, plug-in and other modes, which are not limited here.

[0058] In another embodiment, the middle part of the guide part 312 is provided with a connecting part 313, the battery cell clamping assembly 30 further comprises an elastic member 34, the middle part of the elastic member 34 is connected with the connecting part 313 and is limited in the limiting groove 3121, and the two sliding members 32 are respectively connected with the two ends of the elastic member 34. That is, in this embodiment, the two elastic members 34 are replaced by one elastic member 34, and the connecting part 313 plays a role in fixing the middle part of the elastic member 34.

[0059] Optionally, the connection mode of the clamping member 33 and the sliding member 32 can be selected from screw connection, plug-in, buckle connection and other detachable modes, which are not limited here.

[0060] Optionally, in order to further increase the speed of electrolyte infiltration, such as Figure 6As shown, the electrolyte infiltrating device further comprises a power mechanism 40, which comprises a rotating member 41, a driving member 42, a bearing member 43, an external gear 45, and a fixing member 46. The rotating member 41 is connected to the output end of the driving member 42, and the driving member 42 can drive the rotating member 41 to rotate in the vertical direction. The bearing member 43 is arranged in the vertical direction and is spaced apart from the rotating member 41. The rotating member 41 and the bearing member 43 are connected by at least two external rotating shafts 44, the two ends of the external rotating shaft 44 are respectively pivoted to the rotating member 41 and the bearing member 43, the at least two external rotating shafts 44 are on a circumference, the circumference has the rotating center of the rotating member 41 as the center, the infiltration bin 10 is arranged in one-to-one correspondence with the external rotating shaft 44, and the base 31 is connected with the external rotating shaft 44. Each external rotating shaft 44 is coaxially fixed with an external gear 45. The fixing member 46 is engaged with the at least two external gears 45 and remains stationary when the rotating member 41 rotates. In this embodiment, three external rotating shafts 44 are taken as an example for description, and in other embodiments, the number of external rotating shafts 44 can be two, four or more, which is not limited herein. Through the above arrangement, when the driving member 42 drives the rotating member 41 to rotate, the three external rotating shafts 44 revolve around the center. Since the fixing member 46 is stationary, and each external gear 45 is engaged with the fixing member 46, when the three external gears 45 revolve around the center, since the two ends of the external rotating shaft 44 are respectively pivoted to the bearing member 43 and the rotating member 41, each external gear 45 will revolve with the corresponding external rotating shaft 44. Thereby, the base 31 inside the infiltration bin 10 and the battery cell 200 thereon will revolve with the external rotating shaft 44 to improve the flow speed of the electrolyte in the infiltration process and further shorten the infiltration time.

[0061] In this embodiment, as shown in the figure, Figure 6 The fixing member 46 is arranged at the rotating center of the rotating member 41 and is provided with a ring of engagement teeth on the outer periphery. Each external gear 45 is engaged with part of the ring of engagement teeth. That is, the fixing member 46 is located between the three external gears 45 to realize the revolution of the three external gears 45 driven by the fixing member 46.

[0062] In other embodiments, the fixing member 46 is annular and is provided with a ring of engagement teeth on the inner side. Each external gear 45 is engaged with part of the ring of engagement teeth. This scheme can also realize the revolution of the three external gears 45 driven by the fixing member 46.

[0063] This embodiment also provides a battery cell production line, which comprises a liquid injection device and the above-mentioned electrolyte infiltrating device, and the electrolyte infiltrating device is located upstream of the liquid injection device. By adopting the above-mentioned electrolyte infiltrating device, the battery cell production line can shorten the standing time of the battery cell 200, thereby shortening the manufacturing time of the battery cell 200, and can also adapt to the use of battery cells 200 of different shapes.

[0064] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. An electrolyte impregnation apparatus, characterized by, The application relates to an electrolyte infiltration device. The device comprises: an infiltration bin (10) for placing an electric core (200) inside; a heating assembly (20) arranged inside the infiltration bin (10), which is configured to heat the electric core (200); 2. The electrolytic solution infiltrating device according to claim 1, wherein an electric core clamping assembly (30) comprising a base (31), two sliding members (32) and two clamping members (33), the base (31) is connected to the bottom of the infiltration bin (10), the two sliding members (32) are slidingly connected to the base (31) in a preset direction, and the two clamping members (33) are arranged correspondingly and detachably on the two sliding members (32), the clamping members (33) are adapted to the shape of the electric core (200), and the two sliding members (32) are elastically connected. The heating assembly (20) comprises: a heating member (21) arranged on the inner wall of the infiltration bin (10); 3. The electrolyte impregnation apparatus according to claim 2, wherein a heat preservation member (22) arranged on the side of the heating member (21) away from the inner wall of the infiltration bin (10).

4. The electrolytic solution infiltrating device according to claim 3, wherein The surface of the heating member (21) is provided with a buffer protection layer.

5. The electrolyte impregnation apparatus according to claim 2, wherein The buffer protection layer is made of any one of glass, ceramic or resin.

6. The electrolyte impregnation apparatus according to any one of claims 1 to 5, characterized by The heating member (21) is a thermistor. The base (31) is in T shape and comprises: a mounting portion (311) connected to the bin bottom of the infiltration bin (10); a guide portion (312) connected to the end of the mounting portion (311) away from the bin bottom, the guide portion (312) extends along the preset direction and is provided with a limiting groove (3121) extending along the preset direction; wherein the middle part of the guide portion (312) is provided with a connecting portion (313), the electric core clamping assembly (30) further comprises two elastic members (34), the two elastic members (34) are respectively connected to the two sides of the connecting portion (313) and are limited in the limiting groove (3121), and one sliding member (32) is connected to the end of each elastic member (34) away from the connecting portion (313); or 7. The electrolyte impregnation apparatus according to any one of claims 1 to 5, characterized by the middle part of the guide portion (312) is provided with a connecting portion (313), the electric core clamping assembly (30) further comprises an elastic member (34), the middle part of the elastic member (34) is connected to the connecting portion (313) and is limited in the limiting groove (3121), and the two sliding members (32) are respectively connected to the two ends of the elastic member (34). The electrolyte infiltration device further comprises a power mechanism (40), the power mechanism (40) comprises: a rotating member (41) and a driving member (42), the rotating member (41) is connected to the output end of the driving member (42), and the driving member (42) can drive the rotating member (41) to rotate in the vertical direction. A bearing member (43) is arranged vertically spaced from the rotating member (41), and the rotating member (41) and the bearing member (43) are connected by at least two outer rotating shafts (44), both ends of the outer rotating shaft (44) are respectively pivoted with the rotating member (41) and the bearing member (43), and the at least two outer rotating shafts (44) are on a circumference, the circumference has the rotating center of the rotating member (41) as the center, the soaking bin (10) is arranged one-to-one with the outer rotating shaft (44), and the base (31) is connected with the outer rotating shaft (44); An outer gear (45) is coaxially fixed on each outer rotating shaft (44); A fixed member (46) is engaged with at least two outer gears (45) and remains stationary when the rotating member (41) rotates.

8. The electrolyte impregnation apparatus of claim 7, wherein The fixed member (46) is arranged at the rotating center of the rotating member (41) and is provided with a ring of engagement teeth on the outer periphery, and each outer gear (45) is partially engaged with the ring of engagement teeth.

9. The electrolyte impregnation apparatus of claim 7, wherein The fixed member (46) is annular and is provided with a ring of engagement teeth on the inner side, and each outer gear (45) is partially engaged with the ring of engagement teeth.

10. An electric cell production line, characterized by, The electrolyte soaking device according to any one of claims 1-9 is arranged upstream of the liquid injection device.

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