Degassing equipment for soft package battery cell

Abstract

The utility model discloses soft package battery cell degassing equipment which comprises a platform device and a degassing device, the platform device comprises a degassing platform, the degassing platform is used for placing a battery cell to be degassed, and the degassing device is used for degassing the battery cell by rolling the surface of the battery cell; the degassing device and the degassing platform can relatively rotate by an angle, so that the degassing device can be used for degassing the battery cell at multiple angles. According to the utility model, the problem of wrinkle deformation of the aluminum-plastic film at the edge of the battery cell caused by degassing can be relieved, and the safety and the appearance smoothness of the battery cell are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a degassing device for soft-pack battery cells. Background Art

[0002] A soft-pack battery cell typically consists of a positive electrode sheet, a negative electrode sheet, a separator, tabs, and an aluminum-plastic film. Currently, most soft-pack cells are manufactured in a stacked format, although some are wound. Regardless of the stacked or wound format, gaps exist between the positive electrode sheet, separator, and negative electrode sheet in the soft-pack cell to store the electrolyte. Utility Model Content

[0003] When the gaps between the positive electrode, separator, and negative electrode are not completely filled with electrolyte, they are easily filled with gas, which cuts off the diffusion path of lithium ions. If the gas in the battery cell is not completely discharged, it will lead to hidden dangers such as increased polarization, increased internal resistance and cell temperature rise, and increased cell gas production, which seriously affects the safety performance, cycle life, and load capacity of the battery cell. Moreover, during the cell degassing process, existing cell degassing equipment can easily cause wrinkles and deformation of the aluminum-plastic film at the edge of the cell, affecting the appearance and safety of the cell.

[0004] In view of the problem that existing battery cell degassing equipment easily causes wrinkling and deformation of the aluminum-plastic film at the edge of the battery cell, the purpose of this utility model is to provide a soft-pack battery cell degassing equipment to alleviate the wrinkling and deformation problem of the aluminum-plastic film at the edge of the battery cell caused by degassing, and improve the safety and smoothness of the battery cell.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A degassing device for soft-pack battery cells comprises a platform device and a degassing device. The platform device comprises a degassing platform, the degassing platform is used to place the battery cells to be degassed, and the degassing device degases the battery cells by rolling the surface of the battery cells. The degassing device and the degassing platform can rotate relative to each other at an angle, so that the degassing device can degas the battery cells at multiple angles.

[0007] In one embodiment, the platform device further comprises a base; the degassing platform and the base are rotatably connected; and / or the degassing device and the base are rotatably connected.

[0008] In one embodiment, the platform device further includes a first driving mechanism, which is mounted on the base. The first driving mechanism (such as its output end) is fixedly connected to the degassing platform, and the first driving mechanism can drive the degassing platform to rotate on the base.

[0009] In an embodiment, the first driving mechanism comprises a driving servo motor, which is mounted on the base and connected with the gas removal platform to drive the gas removal platform to rotate on the base.

[0010] In an embodiment, the gas removal platform is provided with a battery cell groove for limiting the battery cell.

[0011] In an embodiment, the gas removal device comprises a driving support and a gas removal part, the driving support is movably mounted on the base, and the gas removal part is mounted on the driving support and can move with the driving support to remove gas from the battery cell.

[0012] In an embodiment, the gas removal part comprises a gas removal roller support and a gas removal roller, two ends of the gas removal roller are rotatably connected with one side of the gas removal roller support, the other side of the gas removal roller support is mounted on the driving support, and the gas removal roller support can move in the vertical direction.

[0013] In an embodiment, the gas removal device further comprises a second driving mechanism, which is mounted on the driving support, fixedly connected with the gas removal roller support (such as the output end thereof, usually vertically downwardly fixedly connected with the gas removal roller support), and drives the gas removal roller support to move in the vertical direction.

[0014] In an embodiment, the gas removal device further comprises a guide pin, one end of the guide pin is connected with the driving support, the gas removal part is provided with a guide hole corresponding to the position of the guide pin, and the other end of the guide pin is in clearance fit with the guide hole.

[0015] In an embodiment, the soft-pack battery cell gas removal equipment further comprises a guide device, and the gas removal device is movably mounted on the base through the guide device.

[0016] In an embodiment, the soft-pack battery cell gas removal equipment further comprises a third driving mechanism, which is mounted on the base and connected with the gas removal device (such as the output end thereof), and drives the gas removal device to move on the horizontal plane.

[0017] The utility model has the advantages that: the degassing device carries out degassing operation to the battery cell through rolling the surface of the battery cell, discharges the residual gas between the pole piece of the soft package battery cell, solves the problem of the polarization increase and lithium precipitation of the battery cell caused by the residual gas in the battery cell, reduces the gas production and temperature rise in the operation process of the battery cell, and improves the safety performance, cycle performance and load capacity of the battery cell; the degassing device and the degassing platform can rotate by an angle, the angle position between the degassing device and the battery cell on the degassing platform changes, the degassing device can carry out multi-angle degassing to the battery cell, the problem of the aluminum plastic film edge of the battery cell being wrinkled and deformed caused by the degassing device always degassing to one position of the battery cell is avoided, the wrinkled and deformed aluminum plastic film edge of the battery cell caused by the multiple degassing is reduced, and the appearance and safety of the battery cell are improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope, and for the ordinary skilled in the art, other related drawings can be obtained without the creative labor on the premise of the drawings.

[0019] Figure 1 It is the assembly drawing of the soft package battery cell degassing equipment of the utility model;

[0020] Figure 2 It is the partial explosion drawing of the platform device of the utility model;

[0021] Figure 3 It is the plan view of the degassing platform of the utility model;

[0022] Figure 4 It is the bottom view of the degassing platform of the utility model;

[0023] Figure 5 It is the plan view of the base of the utility model;

[0024] Figure 6 It is the partial explosion drawing of the degassing device of the utility model;

[0025] Figure 7 It is the assembly drawing of the degassing device of the utility model;

[0026] Figure 8 It is the screw hole schematic drawing of the sliding rail of the utility model;

[0027] Figure 9 It is the assembly drawing of the third driving mechanism and the guide device of the utility model.

[0028] In the figure: 1, platform device; 11, base; 111, first through hole; 112, lower circular groove; 113, connecting through hole; 12, gas removal platform; 121, battery cell groove; 122, second through hole; 123, rectangular hole; 124, upper circular groove; 13, first driving mechanism; 131, driving servo motor; 132, driving coupling; 133, connecting bolt; 134, first pin; 135, thrust ball bearing; 2, gas removal device; 21, driving support; 211, slide rail groove; 22, gas removal part; 221, gas removal roller support; 222, gas removal roller; 23, second driving mechanism; 231, gas removal servo motor; 232, lead screw coupling; 233, gas removal lead screw; 234, second pin; 24, guide pin; 3, guide device; 31, slide rail; 311, slide rail bolt; 312, threaded hole; 4, third driving mechanism; 41, lead screw servo motor; 411, servo bolt; 42, belt; 43, driving lead screw; 44, fixed end; 441, fixed end bolt. DETAILED DESCRIPTION

[0029] The specific embodiments of the present application will be described below in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the description of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] In the description of the present application, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" and the like should be broadly understood, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0031] The terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, which is only for the convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0032] The terms "first", "second", "third" and the like are only for distinguishing similar attributes of elements, and do not indicate or imply relative importance or a specific order.

[0033] The terms "comprise", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0034] The terms "up and down movement", "up", "down", "center position" and similar expressions are for illustrative purposes only and do not represent the only implementation.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] The utility model provides a kind of soft package battery cell degassing equipment, as shown in Figure 1 It includes platform device 1 and degassing device 2, platform device 1 includes degassing platform 12, and degassing platform 12 is used to place the battery cell (not shown) to be degassed, and degassing device 2 is degassed by rolling the surface of the battery cell;Degassing device 2 and degassing platform 12 can rotate relatively by an angle, so that degassing device 2 can multi-angle degassing of the battery cell.

[0037] In the embodiment, degassing device 2 is degassed by rolling the surface of the battery cell to pressurize the battery cell, and the residual gas between the soft package battery cell pole piece is discharged, which solves the problem of increased polarization of the battery cell and lithium precipitation of the pole piece caused by residual gas in the battery cell, reduces the gas production and temperature rise during the operation of the battery cell, and improves the safety performance, cycle performance and load capacity of the battery cell;And degassing device 2 and degassing platform 12 can rotate relatively by an angle, which realizes the change of the angle position between the battery cell on degassing platform 12 and degassing device 2, so that degassing device 2 can multi-angle roll degassing of the battery cell, avoiding the problem of wrinkle deformation of the aluminum plastic film at the edge of the battery cell caused by the fact that degassing device 2 always rolls and degasses at one position of the battery cell, reducing the wrinkle deformation of the aluminum plastic film at the edge of the battery cell caused by multiple degassing, and improving the flatness and safety of the appearance of the battery cell. Wherein, the battery cell is installed on the degassing platform 12, and the battery cell can rotate relative to the degassing device 2, i.e. the degassing platform 12 rotates;Or the battery cell is stationary, and the degassing device 2 rotates relative to the battery cell;Realize the angle change of both. Wherein, base 11 is provided with connecting through hole 113, and the equipment is fixed to the ground or other equipment through bolt cooperation with connecting through hole 113.

[0038] As an embodiment, as shown in Figure 1As shown, the platform device 1 further comprises a base 11; a rotary connection between the degassing platform 12 and the base 11; and / or a rotary connection between the degassing device 2 and the base 11. Specifically, when the degassing platform 12 rotates relative to the base 11, the battery cell on the degassing platform 12 rotates accordingly, so that the degassing device 2 can degas the battery cell at multiple angles; in addition to the direct rotary connection between the degassing platform 12 and the base 11, a turntable (not shown) can also be provided on the base 11, and the degassing platform 12 is installed on the turntable and rotates by rotating the turntable to realize the rotation of the battery cell on the degassing platform 12 relative to the degassing device 2. Alternatively, the battery cell is stationary, and the degassing device 2 and the base 11 are rotatably connected, and the degassing device 2 is rotated to realize degassing at different angles of the battery cell. Of course, the degassing platform 12 and the degassing device 2 can also be rotatable on the base 11. If there is no relative rotation between the battery cell and the degassing device 2, the degassing device 2 degasses from one side of the battery cell to the other side, which not only causes the edge of the battery cell to wrinkle and deform, affecting the appearance and safety of the battery cell, but also causes the gas squeezed out of the battery cell to be concentrated in one side of the gas bag area. Due to the concentration of gas on this side, the gas is easy to enter the interstitial space of the pole piece again after pressure relief, resulting in poor degassing effect.

[0039] As an embodiment, as shown in Figure 1 As shown, the platform device 1 further comprises a first driving mechanism 13, the first driving mechanism 13 is installed on the base 11, and the output end of the first driving mechanism 13 is fixedly connected with the degassing platform 12. The first driving mechanism 13 can drive the degassing platform 12 to rotate on the base 11.

[0040] As an embodiment, as shown in Figures 1 to 4 As shown, the first driving mechanism 13 comprises a driving servo motor 131, the driving servo motor 131 is installed on the base 11, and the driving servo motor 131 is connected with the degassing platform 12 to drive the degassing platform 12 to rotate on the base 11.

[0041] As an embodiment, as shown in Figures 1 to 4As shown, the first driving mechanism 13 further comprises a driving coupling 132, a connecting bolt 133 and a first pin 134, the output end of the driving servo motor 131 is connected with the driving coupling 132 through the first pin 134, one end of the connecting bolt 133 is fixedly connected with the degassing platform 12, and the other end of the connecting bolt 133 is threadedly connected with the driving coupling 132. The output end of the driving servo motor 131 is an output shaft. Specifically, the driving servo motor 131 is connected with the connecting bolt 133 through the driving coupling 132 and the first pin 134, the driving servo motor 131 rotates, and force is transmitted to the degassing platform 12, and the battery cell on the degassing platform 12 rotates on the horizontal plane. Further, after the connecting bolt 133 passes through the second through hole 122 of the degassing platform 12 and the driving coupling 132 passes through the first through hole 111 on the base 11, the two are connected through threads, and the connecting bolt 133 and the degassing platform 12 are clearance fitted through the geometric shape of the connecting bolt cap.

[0042] As an embodiment, as shown in Figures 1 to 5 As shown, the first driving mechanism 13 further comprises a thrust ball bearing 135, the thrust ball bearing 135 is sleeved on the driving coupling 132; the thrust ball bearing 135 comprises an upper race 1351 and a lower race 1352, the upper race 1351 is transitionally fitted with the degassing platform 12, and the lower race 1352 is transitionally fitted with the base 11. Specifically, the upper race 1351 of the thrust ball bearing 135 is transitionally fitted with the upper circular groove 124 at the bottom of the degassing platform 12, and the lower race 1352 thereof is transitionally fitted with the geometric circle on the base 11; the upper circular groove 124 on the degassing platform 12 is transitionally fitted with the upper race 1351 of the thrust ball bearing 135, realizing 360° rotation of the degassing platform 12; the lower circular groove 112 on the base 11 is transitionally fitted with the lower race 1352 of the thrust ball bearing 135, ensuring that the thrust ball bearing 135 does not slide relative to the base 11 at the fitting position, and realizing reliable connection between the base 11 and the lower race 1352 of the thrust ball bearing 135.

[0043] As an embodiment, as shown in Figures 1 to 3 As shown, the degassing platform 12 is provided with a battery cell groove 121, which is used for geometrically limiting the battery cell, so as to realize positioning and rotation of the battery cell by the platform device 1.

[0044] Among them, Figure 3As shown in FIG. 1, the degassing device 2 includes a base 11, a degassing platform 12, a driving servo motor 131, a connecting bolt 133, and a degassing roller 222. The degassing platform 12 is a special tooling, and the length, width, and depth of the cell groove 121 on the degassing platform 12 can be customized according to the size of different types of soft package cells. The design length of the degassing platform 12 is the length of the cell + 1 mm, the width of the degassing platform 12 is the width of the cell + 1 mm, and the depth of the degassing platform 12 is the thickness of the cell + 1 mm. The degassing platform 12 avoids friction between the cell and the inner wall of the cell groove 121 when the cell is loaded into the cell groove 121, limits the position of the cell on the degassing platform 12, and ensures the position stability of the cell during the degassing process. The second through hole 122 at the center of the degassing platform 12 is in clearance fit with the shank of the connecting bolt 133, and the head of the connecting bolt 133 is completely sunk into the rectangular hole 123 at the center of the degassing platform 12. The mechanical fit of the above two parts can transmit the torque of the driving servo to the degassing platform 12. The driving servo motor 131 can accurately control the angle of the degassing platform 12, and the angle of each rotation can be 90°. The driving servo can control the degassing platform 12 to rotate every 90° clockwise or counterclockwise to complete the degassing operation of one cell.

[0045] As an embodiment, as shown in FIG. 1, the degassing device 2 includes a driving bracket 21 and a degassing part 22. The driving bracket 21 is movably installed on the base 11, and the degassing part 22 is installed on the driving bracket 21 and can move with the driving bracket 21 to degas the cell. Figure 1

[0046] As an embodiment, as shown in FIG. 1, the degassing device 2 includes a driving bracket 21 and a degassing part 22. The driving bracket 21 is movably installed on the base 11, and the degassing part 22 is installed on the driving bracket 21 and can move with the driving bracket 21 to degas the cell. Figure 1 Figure 6 Figure 7 As an embodiment, as shown in FIG. 1, the degassing device 2 includes a driving bracket 21 and a degassing part 22. The driving bracket 21 is movably installed on the base 11, and the degassing part 22 is installed on the driving bracket 21 and can move with the driving bracket 21 to degas the cell.

[0047] ​​​The diameter of the degassing roller 222 can be adjusted according to the length and width of the battery cell, and the diameter of the degassing roller 222 is selected in the range of 2-10 cm, and the pressure of the degassing roller 222 is selected in the range of 10-300 Kgf. If the diameter of the degassing roller 222 is too small, it will leave marks on the surface of the battery cell, affecting the safety and appearance of the battery cell; if the diameter of the degassing roller 222 is too large, the pressure of the degassing roller 222 acting on the surface of the battery cell will be too small, and the gas in the battery cell cannot be effectively discharged, thereby affecting the degassing effect. The driving bracket 21 can control the motion trajectory of the degassing roller 222, and the driving distance of the degassing roller 222 driven by the driving bracket 21 is ≤1 m. For example, in a non-working condition, the height between the roller surface of the degassing roller 222 and the surface of the battery cell can be controlled to be 10 mm, so that the rotation of the degassing platform 12 is not affected, and the degassing roller 222 has a short motion stroke, facilitating the rapid degassing operation; it is suitable for almost all soft package battery cells on the market.

[0048] As an embodiment, as shown in Figure 1 、 Figure 6 and Figure 7 , the degassing device 2 further comprises a second driving mechanism 23, the second driving mechanism 23 is installed on the driving bracket 21, the output end of the second driving mechanism 23 is fixedly connected with the degassing roller bracket 221 vertically downward, and the second driving mechanism 23 can drive the degassing roller bracket 221 to move in the vertical direction.

[0049] As an embodiment, as shown in Figure 1 、 Figure 6 and Figure 7 , the second driving mechanism 23 comprises a degassing servo motor 231, a lead screw coupling 232, a degassing lead screw 233 and a second pin 234, the degassing servo motor 231 is installed on the driving bracket 21, the output end of the degassing servo motor 231 is connected with the lead screw coupling 232 through the second pin 234, one end of the degassing lead screw 233 is threadedly connected with the lead screw coupling 232, and the other end of the degassing lead screw 233 is threadedly connected with the degassing roller bracket 221. Specifically, the output end of the degassing servo motor 231, i.e. the output shaft is pin-connected with the lead screw coupling 232 through the second pin 234, one end of the degassing lead screw 233 is threadedly connected with the lead screw coupling 232, and the outer thread of the other end of the degassing lead screw 233 is threadedly matched with the inner thread of the degassing roller bracket 221.

[0050] The fixed mode of the degassing servo motor 231 is fixed on the driving support 21 and mechanically cooperates with it, and the cooperation mode is interference fit; the degassing servo motor 231 is connected through the second pin 234 and the screw rod shaft coupling 232 to transmit force to the degassing screw rod 233, the degassing screw rod 233 drives the degassing roller support 221 to move up and down through the thread and transmits force to the degassing roller 222, the degassing roller 222 acts force on the upper surface of the battery cell, so as to realize the intermittent pressurization and degassing operation of the degassing device 2 on the battery cell.

[0051] As an embodiment, as shown in Figure 1 and Figure 7 , the degassing device 2 further comprises a guide pin 24, one end of the guide pin 24 is connected with the driving support 21, the degassing part 22 is provided with a guide hole (not shown) corresponding to the position of the guide pin 24, the other end of the guide pin 24 is in clearance fit with the guide hole, and the guide pin 24 is arranged in parallel with the degassing screw rod 233. The guide pin 24 and the guide hole on the degassing roller support 221 form a clearance fit to ensure the smoothness of the operation of the degassing roller support 221.

[0052] As an embodiment, as shown in Figure 1 , the soft-packet battery cell degassing equipment further comprises a guide device 3, and the degassing device 2 is movably installed on the base 11 through the guide device 3.

[0053] As an embodiment, as shown in Figure 1 , Figure 7 and Figure 8 , the guide device 3 comprises two slide rails 31, the two slide rails 31 are fixed relative to the base 11, and the degassing device 2 is in sliding connection with the slide rails 31. Specifically, the lower end of the driving support 21 is provided with a slide rail groove 211 in mechanical cooperation with the slide rails 31, the two slide rails 31 are parallel and aligned at both ends and are fixed to the base 11 through slide rail bolts 311, and the degassing platform 12 is located between the two slide rails 31; the contact part of the slide rail 31 and the driving support 21 is in clearance fit, which ensures the position accuracy of the degassing roller 222. The superimposed motion of the degassing device 2 and the guide device 3 together realizes the reciprocating intermittent pressurization and degassing operation of the degassing roller 222 on the battery cell from the center to the periphery.

[0054] As an embodiment, as shown in Figure 1 and Figure 9 , the soft-packet battery cell degassing equipment further comprises a third driving mechanism 4, the third driving mechanism 4 is installed on the base 11, the output end of the third driving mechanism 4 is connected with the degassing device 2, and the third driving mechanism 4 drives the degassing device 2 to move reciprocatingly and intermittently in the horizontal plane.

[0055] As an embodiment, as shown in Figure 1 and Figure 9As shown, the third driving mechanism 4 includes a screw servo motor 41, a belt 42, a driving screw 43 and a fixed end 44, the screw servo motor 41 and the fixed end 44 are both mounted on the base 11, the driving screw 43 is threadedly connected with the degassing device 2, at least one end of the driving screw 43 is rotationally connected with the fixed end 44, and the screw servo motor 41 is drivingly connected with the driving screw 43 through the belt 42. Specifically, the driving screw 43 is threadedly connected with the driving support 21 and is axially connected with the fixed end 44, the fixed end 44 is fixed on the base 11 through a fixed end bolt 441, the driving screw 43 is arranged above the slide rail 31 and is parallel to the slide rail 31, and the screw servo motor 41 is fixed on the base 11 through a servo bolt 411, so that the reciprocating movement of the degassing device 2 relative to the guiding device 3 is realized. The screw servo motor 41 provides power and accurate displacement for the degassing device 2, the degassing servo motor 231 provides accurate pressure and displacement for the degassing roller 222, and the driving servo motor 131 provides rotary power and accurate angular displacement for the degassing platform 12. The frictional force generated by the contact between the degassing roller 222 and the upper surface of the battery cell drives the degassing roller 222 to rotate, so that the accurate control of the force, displacement and angular displacement of the degassing platform 12, the driving screw 43 and the degassing roller 222 by the driving mechanisms is realized.

[0056] Specifically, as shown in the figure, Figures 7 to 9 As shown, two threaded holes 312 are arranged on the slide rail 31 and are fixed on the base 11 through a slide rail bolt 311, the driving support 21 is mechanically connected with the slide rail 31 through a slide rail groove 211 of the driving support 21, the screw servo motor 41 is fixed on the base 11 through a servo bolt 411, the screw servo motor 41 is connected with the driving screw 43 through the belt 42, the screw servo motor 41 transmits torque to the driving screw 43 through the belt 42, the driving screw 43 drives the driving support 21 to move along the slide rail 31 through thread transmission, and thus a driving and guiding system of the driving support 21 is constructed.

[0057] The platform device 1 is designed, accurate positioning and rotation of the battery cell are realized, the degassing roller 222 can realize reciprocating intermittent sectional degassing of the battery cell from the center to the periphery, residual gas between the pole pieces of the battery cell is exhausted, the problems of polarization increase and lithium precipitation of the pole pieces of the battery cell caused by residual gas in the battery cell are solved, the gas production and temperature rise of the battery cell under actual working conditions are reduced, and thus the safety performance, cycle performance and load capacity of the battery cell are improved.

[0058] Working principle and process of the utility model:

[0059] The reciprocating intermittent segmented degassing action of the degassing roller 222 from the center of the battery cell to the periphery is realized through the cooperation of the screw servo motor 41, the degassing servo motor 231, and the driving servo motor 131. The screw servo motor 41 controls the position and movement distance of the degassing roller 222 by controlling the rotation direction and angle. The degassing servo motor 231 controls the pressure and distance between the roller surface of the degassing roller 222 and the surface of the battery cell by controlling the rotation direction and angle. The driving servo motor 131 controls the rotation angle of the degassing platform 12.

[0060] First, the degassing roller 222 is moved to the center position of the battery cell under the drive of the screw servo motor 41. Then, the degassing roller 222 is pressed down under the drive of the degassing servo motor 231. The driving bracket 21 drives the degassing roller 222 to perform the degassing action from the center of the battery cell to its edge under the control of the screw servo motor 41. After the degassing roller 222 reaches the edge of the battery cell, it is lifted up under the drive of the degassing servo motor 231. Then, the degassing platform 12 is rotated by 90° under the control of the driving servo motor 131, and the above-mentioned action is repeated. The degassing of a piece of battery cell is completed after the above-mentioned action is repeated three times, i.e., four times.

[0061] Among them, rotating the degassing platform 12 four times is only one embodiment. Of course, it can also not be rotated or rotated by 180° or any other angle each time. The operation effect is better when the degassing platform 12 is rotated four times. If it is not rotated, the degassing roller 222 will cause the aluminum plastic film at the edge of the battery cell to wrinkle and deform from one side to the other side, which will affect the appearance and safety of the battery cell. Moreover, the gas squeezed out of the battery cell will also be concentrated in one side of the air bag area. If it is rotated by 180° each time, the gas squeezed out of the battery cell will also be dispersed in the air bag area on both sides, which is slightly better. When the degassing platform 12 is rotated four times, the gas squeezed out of the battery cell will be dispersed in the air bag area on four sides, which is better. It is explained here that after the degassing roller 222 degasses from the center of the battery cell to one side of the battery cell and returns to the center again, the degassing platform 12 is rotated by 180°, and the degassing roller 222 repeats the above-mentioned action once, i.e., twice, and the degassing of a piece of battery cell is completed. The effect is the same as that of rotating the degassing platform 12 four times.

[0062] In addition, the degassing action from the center to the edge is only one embodiment. Of course, it can also be performed from the edge, but it is better from the center. Degassing from the center can significantly reduce the wrinkle deformation of the aluminum plastic film at the edge of the battery cell caused by degassing. In addition, the degassing effect of the battery cell is also better.

[0063] The above merely describes preferred embodiments of the present application and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the disclosed technical content without departing from the technical solution of the present application. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application are still within the protection scope of the technical solution of the present application.

Claims

1. A soft-pack battery cell degassing apparatus, characterized by, The platform device (1) comprises a platform device (1) and a degassing device (2), the platform device (1) comprises a degassing platform (12) for placing the battery cell to be degassed, and the degassing device (2) degasses the battery cell by rolling the surface of the battery cell; the degassing device (2) and the degassing platform (12) can rotate relative to each other by an angle, so that the degassing device (2) can multi-angle degassing of the battery cell.

2. The soft-pack battery cell outgassing apparatus of claim 1, wherein, The platform device (1) further comprises a base (11); the degassing platform (12) and the base (11) are rotatably connected; and / or the degassing device (2) and the base (11) are rotatably connected.

3. The soft-pack battery cell outgassing apparatus of claim 2, wherein, The platform device (1) further comprises a first driving mechanism (13), the first driving mechanism (13) is installed on the base (11), the first driving mechanism (13) is fixedly connected with the degassing platform (12), and the first driving mechanism (13) can drive the degassing platform (12) to rotate on the base (11).

4. The soft-pack battery cell outgassing apparatus of claim 3, wherein, The first driving mechanism (13) comprises a driving servo motor (131), the driving servo motor (131) is installed on the base (11), the driving servo motor (131) is connected with the degassing platform (12) to drive the degassing platform (12) to rotate on the base (11).

5. The soft-pack battery cell outgassing apparatus of claim 1, wherein, The degassing platform (12) is provided with a battery cell groove (121), and the battery cell groove (121) is used for limiting the battery cell.

6. The soft-pack battery cell outgassing apparatus of claim 2, wherein, The degassing device (2) comprises a driving support (21) and a degassing part (22), the driving support (21) is movably installed on the base (11), the degassing part (22) is installed on the driving support (21), and the degassing part (22) can move with the driving support (21) to degas the battery cell.

7. The soft-pack battery cell outgassing apparatus of claim 6, wherein, The degassing part (22) comprises a degassing roller support (221) and a degassing roller (222), both ends of the degassing roller (222) are rotatably connected with one side of the degassing roller support (221), the other side of the degassing roller support (221) is installed on the driving support (21), and the degassing roller support (221) can move in the vertical direction.

8. The soft-pack battery cell outgassing apparatus of claim 7, wherein, The degassing device (2) further comprises a second driving mechanism (23), the second driving mechanism (23) is installed on the driving support (21), the second driving mechanism (23) is fixedly connected with the degassing roller support (221), and the second driving mechanism (23) drives the degassing roller support (221) to move in the vertical direction.

9. The soft-pack battery cell outgassing apparatus of claim 6, wherein, The degassing device (2) further comprises a guide pin (24), one end of the guide pin (24) is connected with the driving support (21), the degassing part (22) is provided with a guide hole corresponding to the position of the guide pin (24), and the other end of the guide pin (24) is matched with the guide hole.

10. The soft-pack battery cell outgassing apparatus of claim 2, wherein, The soft package battery cell degassing equipment further comprises a guide device (3), and the degassing device (2) is movably installed on the base (11) through the guide device (3).

11. The soft-pack battery cell outgassing apparatus of claim 2, wherein, The soft package battery cell degassing device further comprises a third driving mechanism (4) installed on the base (11), the third driving mechanism (4) is connected with the degassing device (2), and the third driving mechanism (4) drives the degassing device (2) to move on a horizontal plane.

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