CN210668589U

CN210668589U - Battery cell flat pressing mechanism

Info

Publication number: CN210668589U
Application number: CN201921896267.8U
Authority: CN
Inventors: 魏宏生; 王飞; 阳如坤
Original assignee: Shenzhen Geesun Intelligent Technology Co Ltd
Current assignee: Shenzhen Geesun Intelligent Technology Co Ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-06-02
Anticipated expiration: 2029-11-05

Abstract

The utility model provides an electricity core concora crush mechanism relates to battery manufacturing technical field, which comprises a frame, a pressing plate, first driving piece, switching device and second driving piece, first driving piece sets up in the frame and is connected with the clamp plate, be used for driving the clamp plate motion, switching device includes layering and supporting component, supporting component and layering swing joint, the second driving piece sets up in the frame and is connected with the supporting component transmission, be used for driving supporting component and layering motion, the clamp plate has first pressfitting face, offer the groove of stepping down that is used for assembling the layering on the first pressfitting face, the layering has second pressfitting face, the second pressfitting face is used for packing into with first pressfitting face coplane when stepping down the groove at the layering. Through seting up the groove of stepping down on the clamp plate for the layering can be identical with the clamp plate, and makes the laminating face parallel and level each other, has avoided leaving the indentation on the electric core surface after the concora crush, has guaranteed the roughness on electric core surface.

Description

Battery cell flat pressing mechanism

Technical Field

The utility model relates to a battery manufacturing technology field particularly, relates to an electricity core concora crush mechanism.

Background

Lithium ion battery's application is very extensive, and the preparation of electric core in this battery divide into coiling and lamination dual mode, uses rubber coating diaphragm preparation electric core more and more common now, and this technology needs carry out the concora crush to the electric core of making for pole piece and diaphragm in the electric core flatten the laminating together, prevent that electric core from moving the dislocation between pole piece and the diaphragm when the back process assembly, also improve the formation of the interface between pole piece and diaphragm simultaneously. When the mechanical handle cell is placed into the cell flat pressing mechanism and the flat pressed cell is taken out from the flat pressing mechanism, a switching device is needed to be matched with the mechanical arm to complete the process, the pressing strip of the conventional switching device is fixedly connected with the power mechanism through screws, and when the cell is pressed by the upper pressing plate and the lower pressing plate, the pressing strip is not matched with the pressing plate well, so that the surfaces of the pressing strip and the cell are not coplanar, the surface of the cell after flat pressing can be subjected to indentation, and the surface flatness of the cell is influenced.

In view of this, it is important to design and manufacture a cell flattening mechanism that does not leave any indentation when the upper and lower pressing plates press the cell.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electricity core concora crush mechanism has solved the problem that there is the indentation on electricity core surface behind the electricity core concora crush.

The utility model is realized by adopting the following technical scheme.

The utility model provides a battery core concora crush mechanism, includes frame, clamp plate, first driving piece, switching device and second driving piece, first driving piece sets up in the frame and with the clamp plate is connected, be used for driving the clamp plate motion, switching device includes layering and supporting component, the supporting component with layering swing joint, the second driving piece sets up in the frame and with the supporting component transmission is connected, is used for driving the supporting component with the layering motion, the clamp plate has first pressfitting face, offer on the first pressfitting face and be used for the assembly the groove of stepping down of layering, the layering has second pressfitting face, the second pressfitting face is used for the layering is packed into during the groove of stepping down with first pressfitting face coplane.

Furthermore, the layering is a plurality of, and is a plurality of the layering sets up at interval side by side, seted up a plurality of grooves of stepping down on the clamp plate, it is a plurality of the layering is used for holding in a plurality of the groove of stepping down one-to-one.

Furthermore, the cross section of the pressing strip is trapezoidal, and the receding groove is a trapezoidal groove matched with the shape of the pressing strip.

Furthermore, the switching device also comprises an elastic component, wherein the elastic component is arranged between the pressing strip and the supporting component and is used for applying elastic force close to the supporting component to the pressing strip.

Furthermore, the elastic component comprises an elastic piece and a connecting piece, the connecting piece is connected with the pressing strip, and the elastic piece is arranged between the connecting piece and the supporting component and used for applying elastic force close to the supporting component to the pressing strip through the connecting piece.

Further, the supporting component comprises a supporting rod and a connecting frame, the connecting frame is connected with the second driving piece, one end of the supporting rod is connected with the connecting frame, the other end of the supporting rod is provided with a connecting base platform, a guide hole is formed in the connecting base platform, the connecting piece is movably arranged in the guide hole in a penetrating mode, and the elastic piece is arranged between the connecting base platform and the connecting piece.

Furthermore, a threaded hole is formed in the pressing strip, the connecting piece is a screw, the elastic piece is a pressure spring, the screw penetrates through the guide hole to be in threaded connection with the pressing strip, and the pressure spring is sleeved outside the screw and is respectively abutted against the screw and the connecting base station.

Furthermore, an annular gasket is arranged on the connecting base platform, the annular gasket is sleeved outside the screw and is abutted against the elastic piece, and the aperture of the annular gasket is smaller than or equal to that of the guide hole.

Furthermore, one side of the pressing strip, which is far away from the first pressing surface, is provided with a positioning groove, and the end part of the supporting rod is in clearance fit in the positioning groove and can float along the depth direction of the positioning groove.

Further, the supporting component is movably connected with the middle part or two ends of the pressing strip.

The utility model discloses following beneficial effect has:

the utility model provides a pair of electricity core concora crush mechanism drives the clamp plate motion through first driving piece, drives the switching device motion through the second driving piece to can realize clamp plate and switching device's relative motion, set up the groove of stepping down on the first pressfitting face of clamp plate, the layering is packed into the groove of stepping down when compressing tightly electric core, the second pressfitting face of layering and the first pressfitting face coplane of clamp plate have avoided the layering to bulge in the clamp plate and have compressed tightly and cause the indentation on electric core simultaneously. Compared with the prior art, the utility model provides an electricity core concora crush mechanism through seting up the groove of stepping down on the clamp plate for the layering can be identical with the clamp plate, and makes the mutual parallel and level of pressfitting face, has avoided leaving the indentation on the electric core surface after concora crush, has guaranteed the roughness on electric core surface.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of an overall structure of a cell flattening mechanism according to a first embodiment of the present invention;

FIG. 2 is a schematic view of a connection structure between the frame and the upper platen in FIG. 1;

FIG. 3 is a schematic view of a connection structure between the adapter device and the upper platen in FIG. 1;

FIG. 4 is a partial schematic structural view of the adapter device shown in FIG. 1;

FIG. 5 is a schematic structural view of the adapter device shown in FIG. 1;

FIG. 6 is an assembly view of the upper press bar and upper press plate of FIG. 1;

FIG. 7 is an assembly view of the hold-down bar and hold-down plate of FIG. 1;

FIG. 8 is a schematic view of the connection structure of the elastic member of FIG. 5;

fig. 9 is a partial structural schematic view of the adapter device on the lower side of fig. 1.

Icon: 100-cell flat pressing mechanism; 110-a rack; 130-a platen; 131-an upper press plate; 133-a lower platen; 150-a first drive member; 170-a switching device; 171-pressing strips; 1711-a abdicating groove; 173-a support assembly; 1731-a support bar; 1733-a connecting frame; 1735-a connection base station; 1737-pilot holes; 175-a threaded hole; 177-positioning grooves; 180-a second drive member; 190-a resilient component; 191-an elastic member; 193-a connector; 195-annular shim.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

First embodiment

With reference to fig. 1 to fig. 3, the present embodiment provides a cell flatting mechanism 100, which can avoid leaving an indentation on the surface of a cell after flatting, and ensure the surface quality of the cell.

The cell flat pressing mechanism 100 provided by the embodiment includes a frame 110, a pressing plate 130, a first driving member 150, an adapting device 170, a second driving member 180, and an elastic assembly 190, wherein the first driving member 150 is disposed on the frame 110 and connected to the pressing plate 130 for driving the pressing plate 130 to move, the adapting device 170 includes a pressing strip 171 and a supporting assembly 173, the supporting assembly 173 is movably connected to the pressing strip 171, the second driving member 180 is disposed on the frame 110 and is in transmission connection with the supporting assembly 173 for driving the supporting assembly 173 and the pressing strip 171 to move, the pressing plate 130 has a first pressing surface, the first pressing surface is provided with a yielding groove 1711 for assembling the pressing strip 171, the pressing strip 171 has a second pressing surface, and the second pressing surface is coplanar with the first pressing surface when the pressing strip 171 is installed in the yielding groove 1711. The elastic member 190 is disposed between the pressing bar 171 and the support member 173 for applying an elastic force to the pressing bar 171 near the support member 173.

In this embodiment, the first driving member 150 is a pneumatic/hydraulic cylinder, and the second driving member 180 is a cylinder, and is mounted on the frame 110 to respectively drive the pressing plate 130 and the adapter 170, and driven by different power sources, so that the pressing plate 130 and the adapter 170 can move relatively to each other, thereby implementing the adapter function.

In this embodiment, the two pressing plates 130 include an upper pressing plate 131 and a lower pressing plate 133, which are respectively disposed on the upper side and the lower side of the frame 110, and the first driving member 150 is in transmission connection with the upper pressing plate 131, and is used for driving the upper pressing plate 131 to move up and down along the vertical direction, so as to implement a flat pressing action.

The number of the switching devices 170 is two, the two switching devices 170 are respectively arranged on the upper side and the lower side of the frame 110 and correspond to the two pressing plates 130, and the pressing strips 171 on the upper side and the lower side are respectively accommodated in the abdicating grooves 1711 on the upper pressing plate 131 and the lower pressing plate 133, so that the effect that the pressing strips 171 are flush with the pressing plates 130 is realized.

In this embodiment, the pressing strips 171 are disposed in parallel, the pressing plate 130 is provided with a plurality of receding grooves 1711, and the pressing strips 171 are accommodated in the receding grooves 1711 in a one-to-one correspondence manner. Specifically, a plurality of layering 171 include upper layering 171 and holding down strip 171, and upper layering 171 and holding down strip 171 are a plurality of in this embodiment, have all seted up the groove of stepping down 1711 on two clamp plates 130, and upper layering 171 holding is on upper layering 131, and holding down strip 171 is on holding down plate 133, and a plurality of upper layering 171 and a plurality of holding down strip 171 one-to-one set up for upper layering 171 and holding firmly the electricity core with downside layering 171 when realizing switching function.

In this embodiment, there are two second driving members 180, the two second driving members 180 are respectively disposed at the upper and lower sides of the frame 110, the upper second driving member 180 is in transmission connection with the upper adaptor 170, the lower second driving member 180 is in transmission connection with the lower adaptor 170, under the action of the second driving member 180, the upper adapter 170 and the lower adapter 170 move closer to or away from each other, specifically, the upper pressing bar 171 and the lower pressing bar 171 move closer to or away from each other under the driving action of the respective second driving member 180, thereby realizing the clamping and the loosening of the battery core arranged between the battery core and the manipulator, when loosening, the manipulator clamps the battery core to feed in, after clamping, the manipulator withdraws after loosening the battery cell, and the switching of the battery cell from the battery cell discharging manipulator to the switching device 170 is completed, otherwise, the switching of the battery cell from the switching device 170 to the battery cell discharging manipulator is similar.

It should be noted that, the specific principle of the adapter 170 for implementing the adapter function in the present embodiment can be referred to the existing adapter 170, and is not described herein too much. In the present embodiment, the first driving member 150 is a pneumatic/hydraulic cylinder, the second driving member 180 is an air cylinder, and the power transmission is realized by different power sources, but the first driving member 150 and the second driving member 180 may also be other types of driving members, such as a linear motor or an electric push rod, and the like, and are not limited in particular.

In the present embodiment, the cross section of the pressing bar 171 is trapezoidal, and the receding groove 1711 is a trapezoidal groove adapted to the shape of the pressing bar 171. Specifically, the cross-section of layering 171 is isosceles trapezoid, and the dovetail groove also is isosceles trapezoid, and the width that the dovetail groove is close to first pressfitting face is greater than the width of keeping away from first pressfitting face for the dovetail groove is outer open-ended form, makes things convenient for layering 171 to stretch into and stretches out.

In this embodiment, when carrying out the concora crush electricity core, first driving piece 150 drives clamp plate 130 and compresses tightly on electric core, because layering 171 shape and the slot 1711 shape looks adaptation of stepping down for layering 171 can the holding in the slot 1711 of stepping down during compressing down, the second pressfitting face of layering 171 and the first pressfitting face coplane of clamp plate 130 simultaneously, make layering 171 can not bulge in clamp plate 130 and form the indentation when compressing down on electric core, the surface smoothness of electric core has been guaranteed.

Referring to fig. 4 to 9 in combination, the elastic member 190 includes an elastic member 191 and a connection member 193, the connection member 193 is connected to the pressing bar 171, and the elastic member 191 is disposed between the connection member 193 and the support member 173 for applying an elastic force to the pressing bar 171 through the connection member 193 near the support member 173.

The supporting component 173 includes a supporting rod 1731 and a connecting frame 1733, the connecting frame 1733 is connected with the second driving member 180, one end of the supporting rod 1731 is connected with the connecting frame 1733, the other end of the supporting rod 1735 is provided with a connecting base station 1735, a guide hole 1737 is formed in the connecting base station 1735, the connecting member 193 is movably arranged in the guide hole 1737 in a penetrating manner, and the elastic member 191 is arranged between the connecting base station 1735 and the connecting member 193.

In this embodiment, the pressing bar 171 is provided with a threaded hole 175, the connecting member 193 is a screw, the elastic member 191 is a compression spring, the screw passes through the guide hole 1737 to be in threaded connection with the pressing bar 171, and the compression spring is sleeved outside the screw and abuts against the screw and the connecting base 1735 respectively.

It should be noted that, in this embodiment, the pressing strip 171 and the supporting rod 1731 are connected in a floating manner through the elastic component 191 and the connecting component 193, when the cell is pressed flatly, the pressing plate 130 is driven by the first driving component 150 to press the cell, the pressing strip 171 moves relative to the pressing plate 130 and is installed in the abdicating groove 1711, and due to the matching of the pressing strip 171 and the abdicating groove 1711, the coplanarity of the surfaces of the pressing strip 171 and the pressing plate 130, which are in contact with the cell, can be ensured, and the problem that the indentation exists on the surface of the cell after the flat. In addition, in the embodiment, the compression spring is in a compressed state and applies an elastic force to the connecting member 193, so that the pressing strip 171 can always receive the elastic force close to the supporting rod 1731, and the elastic force provided by the compression spring is greater than or equal to the pressing force when the pressing strip 171 and the pressing plate 130 are matched and ground, thereby ensuring that the pressing strip 171 can be smoothly installed and adapted in the abdicating groove 1711.

In the present 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 be clearance-fitted in the positioning groove 177 and can moderately float in the width direction, which is beneficial for the connecting base 1735 to move in the depth direction of the positioning groove 177, so as to better fit the pressing bar 171 in the receding groove 1711.

In this embodiment, the connection base 1735 is provided with an annular gasket 195, 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 spacer 195, the pressure spring can be abutted against the annular spacer 195, so that the elastic force can be uniformly transmitted.

In this embodiment, the side of the pressing bar 171 away from the first press-fit surface is provided with a positioning groove 177, and the end of the supporting rod 1731 is in clearance fit 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 pressing bar 171 relative to the supporting rod 1731 during the flat pressing process, specifically, when the pressing bar 171 is matched with the receding groove 1711 on the pressing plate 130, the supporting rod 1731 is not in contact with the bottom surface of the positioning groove 177 of the pressing bar 171, and is separated from the receding groove 1711 by a slight distance δ, the force of the pressure spring enables the pressing bar 171 to be well matched with the receding groove 1711 on the pressing plate 130, and the depth t of the positioning groove 177 is greater than δ, so that when the pressing bar 171 floats in the groove depth direction, the bottom surface of the supporting rod 1731, which is connected with the base 1735, cannot be separated.

The supporting member 173 is movably connected to the middle or both ends of the pressing bar 171. In this embodiment, the two ends of the upper pressing bar 171 are respectively movably connected with a support bar 1731, and the connection and power transmission functions are realized through the support bars 1731 at the two ends; a support bar 1731 is movably connected to the middle of the lower pressing bar 171, and power transmission and connection are also achieved through the single support bar 1731. Of course, in other preferred embodiments of the present invention, the upper pressing bar 171 may also be a single supporting rod 1731 disposed in the middle of the pressing bar 171 to realize power transmission, or the pressing bar 171 may also be two supporting rods 1731 disposed at two ends of the pressing bar 171 to realize power transmission.

In this embodiment, the lower portion of the upper supporting rod 1731 close to the upper pressing bar 171 is provided with a step-down opening, the lower portion of the step-down opening is formed to be connected with the base station 1735, the upper cavity of the connecting base station 1735 is convenient for assembling and disassembling screws, the connecting base station 1735 is provided with a guide hole 1737, the screws penetrate through the guide hole 1737 to be in threaded connection with the lower pressing bar 171, and the upper portion of the upper pressing bar 171 is provided with the positioning groove 177.

In this embodiment, a connection base 1735 is disposed on the upper portion of the lower support bar 1731 close to the lower pressing bar 171, the connection base 1735 extends from the root of the upper side of the support bar 1731 to two ends of the pressing bar 171, two guide holes 1737 are respectively disposed on two sides of the connection base 1735, two screws respectively pass through the two guide holes 1737 and are in threaded connection with the pressing bar 171, and the positioning groove 177 is disposed on the lower portion of the pressing bar 171.

The floating connection of the pressing bar 171 and the adaptive matching with the abdicating groove 1711 on the pressing plate 130 are described as follows, the pressing bar 171 of the switching device 170 is connected with the supporting rod 1731 through a screw, a pressure spring and a gasket, when the pressing bar 171 is far away from the abdicating groove 1711 of the pressing plate 130 and is not matched, the connecting base 1735 of the supporting rod 1731 is assembled in the positioning groove 177 and is adhered together under the action of the pressure spring, when the pressing bar 171 is matched with the abdicating groove 1711 of the pressing plate 130, the connecting base 1735 is not contacted with the bottom surface of the positioning groove 177 and is separated from a micro distance delta, the elastic force of the pressure spring enables the pressing bar 171 to be well matched with the abdicating groove 1711 of the pressing plate 130, because the supporting rod 1731 and the groove width direction of the pressing bar 171 are provided with a matching gap, when the pressing bar 171 is matched with the abdicating groove 1711 of the pressing plate 130, the pressing bar 171 can, when the pressing bar 171 floats in the groove depth direction, the bottom surface of the connecting base 1735 will not be separated from the positioning groove 177 of the pressing bar 171.

In summary, because the pressing strip 171 is movably connected with the supporting rod 1731 through a screw, a pressure spring and a gasket, when the pressing strip 171 is matched with the abdicating groove 1711 of the pressing plate 130, the pressing strip 171 can float in the groove depth and the groove width direction relative to the positioning groove 177 of the pressing plate 130 and is in self-adaptive fit with the abdicating groove 1711 of the upper pressing plate 131, and the surfaces of the pressing strip 171 and the pressing plate 130, which are in contact with the battery cell, are matched and ground after being positioned through the trapezoidal groove surface in a matched manner, so that the surface of the pressing strip 171 and the pressing plate 130, which is in contact with the battery cell. Compared with the prior art, in the cell flat pressing mechanism 100 provided in this embodiment, the pressing bar 171 can float, and the groove matched with the pressing plate 130 can be matched in a self-adaptive manner and fit well, so that the surfaces of the pressing bar 171 and the pressing plate 130, which are contacted with the cell after being matched, are coplanar, and no indentation is formed on the surface of the flat pressed cell.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cell flat pressing mechanism is characterized by comprising a rack, a pressing plate, a first driving piece, a switching device and a second driving piece, wherein the first driving piece is arranged on the rack and connected with the pressing plate, the switching device comprises a pressing strip and a supporting component, the supporting component is movably connected with the pressing strip, the second driving piece is arranged on the frame and is in transmission connection with the supporting component, the pressing plate is used for driving the supporting component and the pressing strip to move, the pressing plate is provided with a first pressing surface used for pressing the battery core, the first pressing surface is provided with a abdication groove for assembling the pressing strip, the pressing strip is provided with a second pressing surface for pressing the battery core, the second pressing surface is coplanar with the first pressing surface when the pressing bar is installed in the abdicating groove and tightly presses the battery core.

2. The battery cell flat pressing mechanism according to claim 1, wherein the number of the pressing strips is multiple, the pressing strips are arranged side by side at intervals, the pressing plate is provided with a plurality of receding grooves, and the pressing strips are accommodated in the receding grooves in a one-to-one correspondence manner.

3. The battery cell flat pressing mechanism according to claim 1 or 2, wherein the cross section of the pressing bar is trapezoidal, and the receding groove is a trapezoidal groove adapted to the shape of the pressing bar.

4. The cell flattening mechanism of claim 1, wherein the adapting device further comprises an elastic component, and the elastic component is disposed between the pressing strip and the supporting component and is configured to apply an elastic force to the pressing strip, the elastic force being close to the supporting component.

5. The cell flattening mechanism of claim 4, wherein the elastic assembly includes an elastic member and a connecting member, the connecting member is connected to the pressing strip, and the elastic member is disposed between the connecting member and the supporting assembly and is configured to apply an elastic force to the pressing strip through the connecting member, the elastic force being close to the supporting assembly.

6. The battery cell flat pressing mechanism of claim 5, wherein the supporting assembly comprises a supporting rod and a connecting frame, the connecting frame is connected with the second driving member, one end of the supporting rod is connected with the connecting frame, a connecting base is arranged at the other end of the supporting rod, a guide hole is formed in the connecting base, the connecting member is movably arranged in the guide hole in a penetrating manner, and the elastic member is arranged between the connecting base and the connecting member.

7. The cell flat pressing mechanism according to claim 6, wherein the pressing bar is provided with a threaded hole, the connecting member is a screw, the elastic member is a compression spring, the screw passes through the guide hole and is in threaded connection with the pressing bar, and the compression spring is sleeved outside the screw and abuts against the screw and the connection base station respectively.

8. The battery cell flat pressing mechanism according to claim 7, wherein an annular gasket is disposed on the connection base, the annular gasket is sleeved outside the screw and abuts against the elastic member, and a hole diameter of the annular gasket is smaller than or equal to a hole diameter of the guide hole.

9. The cell flattening mechanism of claim 6, wherein a positioning groove is formed in a side of the pressing bar away from the first pressing surface, and an end of the support rod is in clearance fit with the positioning groove and can float in a depth direction of the positioning groove.

10. The cell flattening mechanism of claim 1, wherein the support assembly is movably connected to a middle portion or two ends of the pressing bar.