A battery cell flattening mechanism

Abstract

The present invention provides a battery cell flattening mechanism, which relates to the field of battery manufacturing technology, and includes a frame, a pressing plate, a first driving member, a switching device, and a second driving member. The first driving member is arranged on the frame and connected to the pressing plate, and is used to drive the pressing plate to move. The switching device includes a pressure strip and a support assembly, and the support assembly is movably connected to the pressure strip. The second driving member is arranged on the frame and is transmission-connected to the support assembly, and is used to drive the support assembly and the pressure strip to move. The pressure plate has a first pressing surface, and a clearance groove for assembling the pressure strip is provided on the first pressing surface. The pressure strip has a second pressing surface, and the second pressing surface is used to be coplanar with the first pressing surface when the pressure strip is installed in the clearance groove. By providing a clearance groove on the pressing plate, the pressure strip can be matched with the pressing plate, and the pressing surfaces are flush with each other, so as to avoid leaving an indentation on the surface of the battery cell after flattening, and ensure the flatness of the surface of the battery cell.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and in particular to a battery cell flattening mechanism. Background Art

[0002] Lithium-ion batteries are widely used. The production of the battery cells in this battery is divided into two methods: winding and lamination. Now it is more and more common to use glue-coated diaphragms to make battery cells. This process requires flattening the manufactured battery cells so that the pole pieces and diaphragms in the battery cells are flattened and fit together to prevent the pole pieces and diaphragms from moving and misaligning when the battery cells are assembled in the later process, and also improve the formation of the interface between the pole pieces and the diaphragms. When the robot puts the battery cells into the battery cell flattening mechanism and takes out the flattened battery cells from the flattening mechanism, an adapter device is required to cooperate with the robot to complete the process. The pressure strip of the existing adapter device is fixedly connected to the power mechanism with screws. When the upper and lower pressure plates press the battery cells, the pressure strip and the pressure plate do not fit well, causing the surfaces they contact with the battery cells to be non-coplanar, which will leave indentations on the surface of the battery cells after flattening, affecting the flatness of the battery cell surface.

[0003] In view of this, it is particularly important to design and manufacture a battery cell flattening mechanism that does not leave an indentation when the upper and lower pressing plates press the battery cell. Summary of the invention

[0004] The purpose of the present invention is to provide a battery cell flattening mechanism, which solves the problem of indentations on the surface of the battery cell after the battery cell is flattened.

[0005] The present invention is achieved by adopting the following technical solutions.

[0006] A battery cell flat pressing mechanism comprises a frame, a pressing plate, a first driving member, a switching device and a second driving member, wherein the first driving member is arranged on the frame and connected to the pressing plate, and is used to drive the pressing plate to move, the switching device comprises a pressure strip and a support assembly, the support assembly is movably connected to the pressure strip, the second driving member is arranged on the frame and is transmission-connected to the support assembly, and is used to drive the support assembly and the pressure strip to move, the pressure plate has a first pressing surface, a clearance groove for assembling the pressure strip is provided on the first pressing surface, and the pressure strip has a second pressing surface, and the second pressing surface is used to be coplanar with the first pressing surface when the pressure strip is installed in the clearance groove.

[0007] Furthermore, there are a plurality of pressure strips, and the plurality of pressure strips are arranged side by side and at intervals, and a plurality of clearance grooves are opened on the pressure plate, and the plurality of pressure strips are used to be accommodated in the plurality of clearance grooves in a one-to-one correspondence.

[0008] Furthermore, the cross-section of the pressure strip is trapezoidal, and the clearance groove is a trapezoidal groove adapted to the shape of the pressure strip.

[0009] Furthermore, the adapter device also includes an elastic component, which is arranged between the pressure strip and the support component and is used to apply an elastic force to the pressure strip to approach the support component.

[0010] Furthermore, the elastic component includes an elastic member and a connecting member, the connecting member is connected to the pressure strip, and the elastic member is arranged between the connecting member and the supporting component, and is used to apply an elastic force to the pressure strip close to the supporting component through the connecting member.

[0011] Furthermore, the support assembly includes a support rod and a connecting frame, the connecting frame is connected to the second driving member, one end of the support rod is connected to the connecting frame, and the other end is provided with a connecting base, the connecting base is provided with a guide hole, the connecting member is movably inserted into the guide hole, and the elastic member is arranged between the connecting base and the connecting member.

[0012] Furthermore, a threaded hole is provided on the pressure strip, the connecting member is a screw, the elastic member is a compression spring, the screw passes through the guide hole and is threadedly connected to the pressure strip, and the compression spring is sleeved outside the screw and respectively abuts against the screw and the connecting base.

[0013] Furthermore, an annular gasket is provided on the connection base, the annular gasket is sleeved outside the screw and abuts against the elastic member, and the aperture of the annular gasket is smaller than or equal to the aperture of the guide hole.

[0014] Furthermore, a positioning groove is provided on a side of the pressure strip away from the first pressing surface, and the end of the support rod is loosely fitted in the positioning groove and can float along the depth direction of the positioning groove.

[0015] Furthermore, the support assembly is movably connected to the middle or both ends of the pressure strip.

[0016] The present invention has the following beneficial effects:

[0017] The present invention provides a cell flattening mechanism, which drives the pressing plate to move by a first driving member and drives the adapter to move by a second driving member, thereby realizing the relative movement of the pressing plate and the adapter. A clearance groove is provided on the first pressing surface of the pressing plate, and the pressure strip is installed in the clearance groove when the cell is pressed. At the same time, the second pressing surface of the pressure strip is coplanar with the first pressing surface of the pressing plate, thereby preventing the pressure strip from protruding from the pressing plate and pressing on the cell to cause an indentation. Compared with the prior art, the cell flattening mechanism provided by the present invention, by providing a clearance groove on the pressing plate, enables the pressure strip to match the pressing plate, and makes the pressing surfaces flush with each other, thereby avoiding leaving an indentation on the cell surface after flattening, and ensuring the flatness of the cell surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the overall structure of the battery cell flattening mechanism provided in the first embodiment of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the connection structure between the middle frame and the upper pressure plate;

[0021] Figure 3 for Figure 1 Schematic diagram of the connection structure between the intermediate transfer device and the upper pressure plate;

[0022] Figure 4 for Figure 1 A schematic diagram of the partial structure of the switching device on the upper middle side;

[0023] Figure 5 for Figure 1 A schematic diagram of the structure of the switching device on the upper middle side;

[0024] Figure 6 for Figure 1 Assembly drawing of middle pressure strip and upper pressure plate;

[0025] Figure 7 for Figure 1 Assembly drawing of middle pressure strip and lower pressure plate;

[0026] Figure 8 for Figure 5 Schematic diagram of the connection structure of the elastic component;

[0027] Fig. 9 for Figure 1 Schematic diagram of the partial structure of the adapter device on the lower middle side.

[0028] Icons: 100-battery cell flattening mechanism; 110-frame; 130-pressing plate; 131-upper pressing plate; 133-lower pressing plate; 150-first driving member; 170-adapting device; 171-pressing strip; 1711-clearance groove; 173-support assembly; 1731-support rod; 1733-connecting frame; 1735-connecting base; 1737-guide hole; 175-threaded hole; 177-positioning groove; 180-second driving member; 190-elastic assembly; 191-elastic member; 193-connecting member; 195-annular gasket. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the inventive product is usually placed when in use, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0035] First embodiment

[0036] See also Figures 1 to 3The present embodiment provides a battery cell pressing mechanism 100, which can avoid leaving indentations on the surface of the battery cell after pressing, thereby ensuring the surface quality of the battery cell.

[0037] The present embodiment provides a cell flattening mechanism 100, comprising a frame 110, a pressing plate 130, a first driving member 150, a switching device 170, a second driving member 180 and an elastic component 190. The first driving member 150 is arranged on the frame 110 and connected to the pressing plate 130, and is used to drive the pressing plate 130 to move. The switching device 170 comprises a pressure strip 171 and a support component 173, and the support component 173 is movably connected to the pressure strip 171. The second driving member 180 is arranged on the frame 110 and is transmission-connected to the support component 173, and is used to drive the support component 173 and the pressure strip 171 to move. The pressure plate 130 has a first pressing surface, and a clearance groove 1711 for assembling the pressure strip 171 is opened on the first pressing surface. The pressure strip 171 has a second pressing surface, and the second pressing surface is used to be coplanar with the first pressing surface when the pressure strip 171 is installed in the clearance groove 1711. The elastic component 190 is disposed between the pressure strip 171 and the support component 173 , and is used to apply elastic force to the pressure strip 171 to approach the support component 173 .

[0038] In this embodiment, the first driving member 150 is a gas-liquid booster cylinder, and the second driving member 180 is a cylinder, which are installed on the frame 110, and drive the pressure plate 130 and the adapter 170 respectively. They are driven by different power sources so that the pressure plate 130 and the adapter 170 can move relative to each other, thereby realizing the transfer function.

[0039] In this embodiment, there are two pressing plates 130, including an upper pressing plate 131 and a lower pressing plate 133, which are respectively arranged on the upper and lower sides of the frame 110. The first driving member 150 is transmission-connected to the upper pressing plate 131, and is used to drive the upper pressing plate 131 to move up and down in the vertical direction to realize a flat pressing action.

[0040] There are also two adapter devices 170, which are respectively arranged on the upper and lower sides of the frame 110, corresponding to the two pressure plates 130, and the pressure strips 171 on the upper and lower sides are respectively accommodated in the make-way grooves 1711 on the upper pressure plate 131 and the lower pressure plate 133, thereby achieving the effect of the pressure strips 171 being flush with the pressure plate 130.

[0041] In this embodiment, a plurality of beading strips 171 are arranged in parallel, and a plurality of clearance grooves 1711 are provided on the pressing plate 130, and the plurality of beading strips 171 are used to be accommodated in the plurality of clearance grooves 1711 in a one-to-one correspondence. Specifically, the plurality of beading strips 171 include an upper beading strip 171 and a lower beading strip 171. In this embodiment, there are a plurality of upper beading strips 171 and a plurality of lower beading strips 171. The two pressing plates 130 are provided with clearance grooves 1711. The upper beading strip 171 is accommodated on the upper pressing plate 131, and the lower beading strip 171 is accommodated on the lower pressing plate 133. The plurality of upper beading strips 171 and the plurality of lower beading strips 171 are arranged in a one-to-one correspondence, so that the upper beading strip 171 and the lower beading strip 171 can firmly clamp the battery cell when the switching function is realized.

[0042] In this embodiment, there are two second driving members 180, and the two second driving members 180 are respectively arranged on the upper and lower sides of the frame 110. The upper second driving member 180 is transmission connected to the upper adapter 170, and the lower second driving member 180 is transmission connected to the lower adapter 170. Under the action of the second driving member 180, the upper adapter 170 and the lower adapter 170 approach or move away from each other. Specifically, the upper pressure bar 171 and the lower pressure bar 171 are driven by their respective second driving members 180 to approach or move away from each other, thereby realizing the clamping and loosening of the battery cells placed therebetween. When loosening, the robot clamps the battery cells and sends them in. After clamping, the robot loosens the battery cells and withdraws, completing the transfer of the battery cells from the battery cell unloading robot to the adapter 170. Conversely, the transfer of the battery cells from the adapter 170 to the battery cell unloading robot is similar.

[0043] It should be noted that the specific principle of the adapter 170 mentioned in this embodiment to realize the switching function can be referred to the existing adapter 170, and no further description is given here. In this embodiment, the first driving member 150 is a gas-liquid booster cylinder, and the second driving member 180 is a cylinder, and power transmission is realized through different power sources. Of course, the first driving member 150 and the second driving member 180 can also be other types of driving members, such as a linear motor or an electric push rod, etc., which are not specifically limited here.

[0044] In this embodiment, the cross section of the bead 171 is trapezoidal, and the clearance groove 1711 is a trapezoidal groove that matches the shape of the bead 171. Specifically, the cross section of the bead 171 is an isosceles trapezoid, the trapezoidal groove is also an isosceles trapezoid, and the width of the trapezoidal groove close to the first pressing surface is greater than the width away from the first pressing surface, so that the trapezoidal groove is open outward, which facilitates the bead 171 to extend in and out.

[0045] In this embodiment, when the battery cell is flattened, the first driving member 150 drives the pressing plate 130 to press on the battery cell. Since the shape of the pressing strip 171 is adapted to the shape of the making way groove 1711, the pressing strip 171 can be accommodated in the making way groove 1711 when pressed. At the same time, the second pressing surface of the pressing strip 171 is coplanar with the first pressing surface of the pressing plate 130, so that when pressed on the battery cell, the pressing strip 171 will not protrude from the pressing plate 130 and form an indentation, thereby ensuring the surface flatness of the battery cell.

[0046] See also Figures 4 to 9 The elastic component 190 includes an elastic member 191 and a connecting member 193 . The connecting member 193 is connected to the pressure strip 171 . The elastic member 191 is arranged between the connecting member 193 and the supporting component 173 , and is used to apply an elastic force close to the supporting component 173 to the pressure strip 171 through the connecting member 193 .

[0047] The support assembly 173 includes a support rod 1731 and a connecting frame 1733. The connecting frame 1733 is connected to the second driving member 180. One end of the support rod 1731 is connected to the connecting frame 1733, and the other end is provided with a connecting base 1735. The connecting base 1735 is provided with a guide hole 1737. The connecting member 193 is movably inserted into the guide hole 1737. The elastic member 191 is arranged between the connecting base 1735 and the connecting member 193.

[0048] In this embodiment, a threaded hole 175 is opened on the pressure strip 171, the connecting member 193 is a screw, the elastic member 191 is a compression spring, the screw passes through the guide hole 1737 and is threadedly connected to the pressure strip 171, and the compression spring is sleeved outside the screw and respectively abuts against the screw and the connecting base 1735.

[0049] It should be noted that in this embodiment, the pressure strip 171 and the support rod 1731 are connected in a floating manner through the elastic member 191 and the connecting member 193. When the battery cell is pressed flat, the pressing plate 130 is driven by the first driving member 150 to press the battery cell, and the pressure strip 171 moves relative to the pressing plate 130 and is installed in the clearance groove 1711. Since the pressure strip 171 and the clearance groove 1711 are adapted to each other, it can ensure that the surfaces of the pressure strip 171 and the pressing plate 130 in contact with the battery cell are coplanar, solving the problem of indentations on the surface of the battery cell after flat pressing. In addition, in this embodiment, the compression spring is in a compressed state and applies elastic force to the connecting member 193, so that the pressure strip 171 can always be subjected to the elastic force close to the support rod 1731, and the elastic force provided by the compression spring should be greater than or equal to the pressing force of the pressure strip 171 and the pressing plate 130 when they are worn, ensuring that the pressure strip 171 can be smoothly installed and adapted to the clearance groove 1711.

[0050] In this embodiment, the width of the positioning groove 177 is slightly larger than the width of the connecting base 1735, so that the connecting base 1735 can fit in the positioning groove 177 with a clearance and can float moderately in the width direction, which is beneficial for the connecting base 1735 to move in the depth direction of the positioning groove 177 to better assemble the pressure strip 171 in the clearance groove 1711.

[0051] In this embodiment, an annular gasket 195 is provided on the connection base 1735. The annular gasket 195 is sleeved outside the screw and abuts against the elastic member 191, and the aperture of the annular gasket 195 is smaller than or equal to the aperture of the guide hole 1737. By providing the annular gasket 195, the compression spring can abut against the annular gasket 195, so that the elastic force can be evenly transmitted.

[0052] In this embodiment, a positioning groove 177 is provided on the side of the pressure strip 171 away from the first pressing surface, and the end of the support rod 1731 is loosely fitted in the positioning groove 177 and can float along the depth direction of the positioning groove 177. It should be noted that the depth of the positioning groove 177 should be greater than the floating height of the pressure strip 171 relative to the support rod 1731 during the flat pressing process. Specifically, when the pressure strip 171 is matched with the clearance groove 1711 on the pressing plate 130, the support rod 1731 does not contact the bottom surface of the positioning groove 177 of the pressure strip 171 and is separated by a small distance δ. The force of the compression spring enables the pressure strip 171 to be well matched with the clearance groove 1711 on the pressing plate 130. The depth t of the positioning groove 177 is greater than δ, so that when the pressure strip 171 floats along the groove depth direction, the bottom surface of the connecting base 1735 of the support rod 1731 will not fall out of the clearance groove 1711 of the pressure strip 171.

[0053] The support assembly 173 is movably connected to the middle or both ends of the pressure strip 171. In this embodiment, the two ends of the upper pressure strip 171 are movably connected with support rods 1731, and the connection and power transmission are achieved through the support rods 1731 at both ends; the middle part of the lower pressure strip 171 is movably connected with the support rod 1731, and the power transmission and connection are also achieved through the single support rod 1731. Of course, in other preferred embodiments of the present invention, the upper pressure strip 171 can also be a single support rod 1731 set in the middle of the pressure strip 171 to achieve power transmission, or the pressure strip 171 can also be two support rods 1731 set at both ends of the pressure strip 171 to achieve power transmission.

[0054] In this embodiment, a clearance opening is provided at the lower part of the upper support rod 1731 near the upper pressure strip 171, and a connecting base 1735 is formed at the lower part of the clearance opening. The upper cavity of the connecting base 1735 is convenient for disassembly and assembly of screws. A guide hole 1737 is provided on the connecting base 1735, and the screw passes through the guide hole 1737 and is threadedly connected to the lower pressure strip 171. A positioning groove 177 is provided at the upper part of the upper pressure strip 171.

[0055] In this embodiment, a connecting base 1735 is provided on the upper part of the lower support rod 1731 near the lower pressure strip 171. The connecting base 1735 extends from the upper root of the support rod 1731 to the two ends of the pressure strip 171. A guide hole 1737 is respectively provided on both sides of the connecting base 1735. Two screws pass through the two guide holes 1737 respectively and are threadedly connected to the pressure strip 171. A positioning groove 177 is provided at the lower part of the lower pressure strip 171.

[0056] The floating connection of the pressure strip 171 and the adaptive matching with the clearance groove 1711 on the pressure plate 130 are described as follows: the pressure strip 171 of the adapter 170 is connected to the support rod 1731 by screws, compression springs, and washers. When the pressure strip 171 is away from the clearance groove 1711 of the pressure plate 130 and is not matched, the connecting base 1735 of the support rod 1731 is assembled in the positioning groove 177 and fits together under the action of the compression spring. When the pressure strip 171 is matched with the clearance groove 1711 of the pressure plate 130, the connecting base 1735 does not contact the bottom surface of the positioning groove 177, leaving A tiny distance δ, the elastic force of the compression spring makes the pressure strip 171 fit well with the clearance groove 1711 of the pressure plate 130. Since a matching gap is left in the width direction of the groove between the support rod 1731 and the pressure strip 171, when the pressure strip 171 fits with the clearance groove 1711 of the pressure plate 130, the pressure strip 171 can float appropriately in the width direction. At the same time, the depth t of the positioning groove 177 of the pressure strip 171 is greater than the upward movement distance δ of the pressure strip 171, so that when the pressure strip 171 floats along the groove depth direction, the bottom surface of the connecting base 1735 will not fall out of the positioning groove 177 of the pressure strip 171.

[0057] In summary, since the pressure strip 171 and the support rod 1731 are movably connected by screws, compression springs, and gaskets, when the pressure strip 171 cooperates with the clearance groove 1711 of the pressure plate 130, the pressure strip 171 can float relative to the groove depth and groove width direction of the positioning groove 177 of the pressure plate 130, and adaptively cooperate with the clearance groove 1711 of the upper pressure plate 131, and the surfaces in contact with the battery cell are matched and positioned by the trapezoidal groove surface, and then ground, to ensure that the pressure strip 171 and the surface of the pressure plate 130 that contacts the battery cell are coplanar, and solve the problem of indentations on the surface of the battery cell after flat pressing. Compared with the prior art, the battery cell flat pressing mechanism 100 provided in this embodiment has a pressure strip 171 that can float, and can adaptively cooperate and fit well with the matching groove on the pressure plate 130, so that the surface of the pressure strip 171 and the pressure plate 130 that contacts the battery cell is coplanar, ensuring that there are no indentations on the surface of the flat pressed battery cell.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery cell flattening mechanism, characterized in that: The invention comprises a frame, a pressing plate, a first driving member, a transfer device and a second driving member, wherein the first driving member is arranged on the frame and connected to the pressing plate, and is used to drive the pressing plate to move, the transfer device comprises a pressure strip and a support assembly, the support assembly is movably connected to the pressure strip, the second driving member is arranged on the frame and is drivingly connected to the support assembly, and is used to drive the support assembly and the pressure strip to move, the pressure plate has a first pressing surface for pressing the battery cell, a clearance groove for assembling the pressure strip is provided on the first pressing surface, the pressure strip has a second pressing surface for pressing the battery cell, and the second pressing surface is used to be coplanar with the first pressing surface when the pressure strip is installed in the clearance groove and presses the battery cell; There are multiple pressure strips, and the multiple pressure strips are arranged side by side at intervals. The pressure plate is provided with multiple give way grooves, and the multiple pressure strips are used to be accommodated in the multiple give way grooves one by one; the transfer device also includes an elastic component, which is arranged between the pressure strip and the support component, and is used to apply an elastic force to the pressure strip to approach the support component; the elastic component includes an elastic member and a connecting member, and the connecting member is connected to the pressure strip, and the elastic member is arranged between the connecting member and the support component, and is used to apply an elastic force to the pressure strip to approach the support component through the connecting member; the support component includes a support rod and a connecting frame, and the connecting frame is connected to the second driving member One end of the support rod is connected to the connecting frame, and the other end is provided with a connecting base, a guide hole is opened on the connecting base, the connecting member is movably inserted into the guide hole, and the elastic member is arranged between the connecting base and the connecting member; a threaded hole is opened on the pressure strip, the connecting member is a screw, and the elastic member is a compression spring, the screw passes through the guide hole and is threadedly connected to the pressure strip, the compression spring is sleeved outside the screw and respectively abuts against the screw and the connecting base; an annular gasket is provided on the connecting base, the annular gasket is sleeved outside the screw and abuts against the elastic member, and the aperture of the annular gasket is less than or equal to the aperture of the guide hole.

2. The battery cell flattening mechanism according to claim 1, characterized in that: The cross section of the pressure strip is trapezoidal, and the clearance groove is a trapezoidal groove matched with the shape of the pressure strip.

3. The battery cell flattening mechanism according to claim 1, characterized in that: A positioning groove is provided on one side of the pressure strip away from the first pressing surface, and the end of the support rod is loosely fitted in the positioning groove and can float along the depth direction of the positioning groove.

4. The battery cell flattening mechanism according to claim 1, characterized in that: The support assembly is movably connected to the middle part or both ends of the pressure strip.

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