CN221349540U

CN221349540U - Device for improving baking temperature uniformity of battery cell

Info

Publication number: CN221349540U
Application number: CN202322712797.5U
Authority: CN
Inventors: 汤继磊; 丁帅铭; 张庆江
Original assignee: Jiewei Power Industry Jiaxing Co ltd
Current assignee: Jiewei Power Industry Jiaxing Co ltd
Priority date: 2023-10-10
Filing date: 2023-10-10
Publication date: 2024-07-16
Anticipated expiration: 2033-10-10

Abstract

The utility model discloses a device for improving the baking temperature uniformity of a battery cell, which comprises a frame body, a plurality of heating plate components, a transmission component and a moving component, wherein the heating plate components are connected with the frame body; the plurality of heating plate components are arranged in the frame body, and two ends of the plurality of heating plate components are connected with two sides of the frame body in a sliding manner; the battery core is arranged between two adjacent heating plate components in the plurality of heating plate components; the movable assembly is connected with one side of one heating plate assembly in the plurality of heating plate assemblies, the transmission assembly is arranged at one end of the frame body, and the movable assembly is in sliding connection with the transmission assembly, so that the transmission assembly drives the movable assembly to reciprocate, the movable assembly drives the plurality of heating plate assemblies to move, and then the adjacent two heating plate assemblies are compressed/expanded, and the baking of the battery cell is realized.

Description

Device for improving baking temperature uniformity of battery cell

Technical Field

The utility model relates to the technical field of lithium ion batteries, in particular to a device for improving baking temperature uniformity of a battery cell.

Background

At present, the baking technology of the battery cell adopts the wind-carrying type heating baking or fixed clamp baking technology, which can realize the baking of the moisture of the battery cell, but has a plurality of defects, such as: 1) The heating uniformity of the surface of the battery cell is poor, and the baking effect is insufficient under the same time; the air-carrying type heating baking or the fixed clamp baking mainly uses heat radiation to heat and bake the battery cell, and compared with equidistant pressurizing baking, the battery cell has insufficient surface temperature uniformity and moisture removal effect; 2) The energy utilization rate is low; more time is needed for carrying out wind-carrying type heating baking or fixed clamp baking to remove the moisture of the battery cell, and part of heat can be pumped away by negative pressure. Therefore, the prior art has the problems of poor uniformity of the baking temperature of the battery cell, long baking time, low energy utilization rate and the like.

Aiming at the problems in the related art, the utility model provides a device for improving the baking temperature uniformity of a battery cell.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model provides a device for improving the baking temperature uniformity of a battery cell, thereby ensuring the baking temperature uniformity of the battery cell, and finally improving the moisture removal uniformity of the battery cell of a lithium battery without damaging the battery cell due to overhigh local temperature.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a device for improving the baking temperature uniformity of a battery cell comprises a frame body, a plurality of heating plate components connected with the frame body, a transmission component and a moving component; the plurality of heating plate components are arranged in the frame body, and two ends of the plurality of heating plate components are connected with two sides of the frame body in a sliding manner; the battery core is arranged between two adjacent heating plate components in the plurality of heating plate components; the movable assembly is connected with one side of one heating plate assembly in the plurality of heating plate assemblies, the transmission assembly is arranged at one end of the frame body, and the movable assembly is in sliding connection with the transmission assembly, so that the transmission assembly drives the movable assembly to reciprocate, the movable assembly drives the plurality of heating plate assemblies to move, and then the adjacent two heating plate assemblies are compressed/expanded, and the baking of the battery cell is realized.

Further, the frame body comprises a first mounting plate, a second mounting plate, two side plates and a bottom plate; the two side plates are respectively arranged at two sides of the first mounting plate and the second mounting plate, one ends of the two side plates are connected with the first mounting plate, and the other ends of the two side plates are connected with the second mounting plate; the bottom plate is installed in the below of first mounting panel, second mounting panel, and the one end and the first mounting panel of bottom plate are connected, and the other end and the second mounting panel of bottom plate are connected.

Further, the heating plate assembly comprises a heating plate body and mounting frames arranged at two ends of the heating plate body; a groove matched with the heating plate body is formed in one side of the mounting frame, so that two ends of the heating plate body are arranged in the groove and fixedly connected with the mounting frame; the mounting bracket opposite side has been seted up with the first spout of curb plate looks adaptation to make the curb plate set up in first spout, and then make the mounting bracket slide along the curb plate.

Further, the second sliding grooves are formed in the top and the bottom of the side plate, rollers matched with the second sliding grooves are arranged at positions, close to the top and the bottom of the side plate, of the other side of the mounting frame, and the rollers are arranged in the second sliding grooves so that the rollers drive the mounting frame to move when sliding along the second sliding grooves.

Further, a sliding column is arranged between the mounting frames of the two adjacent heating plate assemblies, so that the heating plate assemblies move along the sliding column.

Further, the sliding column comprises a column body and limiting blocks arranged at two ends of the column body, openings matched with the column body are formed in the two adjacent mounting frames, and the openings penetrate through the column body so that the two adjacent mounting frames can move along the column body.

Further, the transmission assembly comprises a driving wheel, a plurality of driven wheels, a rotating shaft connected with the driving wheel, a synchronous belt wound on the driving wheel and the driven wheels, and a screw rod connected with the driven wheels, wherein the driving wheel is arranged at a position, close to the middle, of the first mounting plate, the driven wheels are arranged at positions, close to the two ends, of the first mounting plate, the screw rod is arranged on the side face of the frame body, and the rotating shaft drives the driving wheel to rotate when rotating, so that the driving wheel drives the synchronous belt and the driven wheels to rotate, and the driven wheels drive the screw rod to rotate.

Further, the moving assembly comprises a moving plate and a screw nut fixedly connected with the moving plate, the moving plate is connected with one side of the heating plate assembly, a threaded opening matched with the screw rod is formed in the middle of the screw nut, the screw nut is sleeved on the screw rod through the threaded opening, the screw nut is driven to move when the screw rod rotates, the screw nut is further driven to move, and the moving plate drives the heating plate assemblies to move.

Further, the temperature control module is arranged on the first mounting plate and is electrically connected with the heating plate body.

Further, the top of the heating plate body is also provided with a fire arrow.

Compared with the prior art, the utility model solves the problems of poor baking temperature uniformity, long baking time, low energy utilization rate and the like of the battery cells by adopting the equidistant pressurizing type baking clamp technology, ensures the baking temperature uniformity of the battery cells, the moisture removal uniformity of the battery cells and the like, and improves the energy utilization rate.

Drawings

FIG. 1 is a block diagram of an apparatus for improving uniformity of baking temperature of a battery cell according to a first embodiment;

FIG. 2 is a right side view of an apparatus for improving uniformity of baking temperature of a battery cell according to a first embodiment;

FIG. 3 is a front view of an apparatus for improving uniformity of baking temperature of a battery cell according to a first embodiment;

FIG. 4 is a partial top view of an apparatus for improving uniformity of baking temperature of a battery cell according to a first embodiment;

FIG. 5 is a partial top view of an apparatus for improving uniformity of baking temperature of a battery cell according to a first embodiment;

FIG. 6 is a block diagram of a plurality of heat plate assemblies according to the first embodiment;

FIG. 7 is a right side view of a plurality of heat plate assemblies according to one embodiment;

FIG. 8 is a front view of a plurality of heat plate assemblies according to one embodiment;

FIG. 9 is a top view of a plurality of heat-generating plate assemblies according to one embodiment;

1, a frame body; 11. a first mounting plate; 12. a second mounting plate; 13. the bottom plate 14, the fixed column 15 and the fixed plate; 16. an upper cross beam; 161. a second upper chute; 17. a lower cross beam; 171. a second lower chute; 2. a heat generating plate assembly; 21. a heating plate body; 22. a mounting frame; 221. a groove; 222. a first upper chute; 223. a first lower chute; 23. a first sliding column; 24. a second sliding column; 25. an upper roller; 26. a lower roller; 27. an opening; 28. fire arrows; 31. a driving wheel; 32. driven wheel; 33. a rotating shaft; 34. a synchronous belt; 35. a screw rod; 36. a fixing member; 41. a moving plate; 42. a screw nut; 43. a moving rack; 5. a battery cell; 6. and a temperature control module.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

The utility model aims at overcoming the defects of the prior art and provides a device for improving the baking temperature uniformity of a battery cell.

Example 1

The embodiment provides a device for improving the baking temperature uniformity of a battery cell, which is shown in fig. 1-5, and comprises a frame body 1, a plurality of heating plate assemblies 2, a transmission assembly and a moving assembly.

The plurality of heating plate components 2 are arranged in the frame body 1, and two ends of the plurality of heating plate components 2 are in sliding connection with two sides of the frame body 1; the battery core 5 is arranged between two adjacent heating plate assemblies 2 in the plurality of heating plate assemblies 2; the movable assembly is connected with one side of one heating plate assembly 2 in the plurality of heating plate assemblies 2, the transmission assembly is arranged at one end of the frame body 1, and the movable assembly is in sliding connection with the transmission assembly, so that the transmission assembly drives the movable assembly to reciprocate, the movable assembly drives the plurality of heating plate assemblies 2 to move, and then the adjacent two heating plate assemblies 2 are compressed/expanded, and the baking of the battery cell is realized.

The frame body 1 comprises a first mounting plate 11, a second mounting plate 12, two side plates, a bottom plate 13, a fixed column 14 and a fixed plate 15; each of which includes an upper beam 16, a lower beam 17.

The first mounting plate 11 and the second mounting plate 12 are arranged at two ends, the bottom plate 13 is arranged at the bottoms of the first mounting plate 11 and the second mounting plate 12, and two ends of the bottom plate 13 are fixedly connected with the first mounting plate 11 and the second mounting plate 12 respectively through clamping, welding and other modes.

The upper beam 16, the lower beam 17 and the fixing plates 15 are arranged on two sides of the first mounting plate 11 and the second mounting plate 12, the upper beam 16 is arranged above the lower beam 17, the lower beam 17 is arranged above the fixing plates 15, so that two ends of the upper beam 16 are fixedly connected with positions, close to the tops, of the side surfaces of the first mounting plate 11 and the second mounting plate 12 respectively in a clamping, welding and other modes, two ends of the lower beam 17 are fixedly connected with positions, close to the middle, of the side surfaces of the first mounting plate 11 and the second mounting plate 12 respectively in a clamping, welding and other modes, two ends of the fixing plates 15 are fixedly connected with positions, close to the bottoms, of the side surfaces of the first mounting plate 11 and the second mounting plate 12 respectively in a clamping, welding and other modes, and the bottoms of the fixing plates 15 are fixedly connected with the bottom plate 13 in a clamping, welding and other modes.

The fixed column 14 is arranged on the side surface of the frame body 1, the side surface of the fixed column 14 close to the top is fixedly connected with the side surface of the upper beam 16 in a clamping, welding and other manners, the side surface of the fixed column 14 close to the middle is fixedly connected with the side surface of the lower beam 17 in a clamping, welding and other manners, the side surface of the fixed column 14 close to the bottom is fixedly connected with the side surface of the upper fixed plate 15 in a clamping, welding and other manners, and the bottom of the fixed column 14 is fixedly connected with the top surface of the bottom plate 13 in a clamping, welding and other manners; the present embodiment provides 6 fixing columns 14, and 3 fixing columns 14 are provided on each side, but the number of fixing columns 14 is not limited to the number of famous air given in the present embodiment, and may be installed according to practical situations.

The plurality of heating plate assemblies 2 are arranged in the frame body 1, and each heating assembly 2 comprises a heating plate body 21, a mounting frame 22, a sliding column and rollers; wherein the sliding columns comprise a first sliding column 23 and a second sliding column 24; the rollers include an upper roller 25 and a lower roller 26.

The heating plate body 21 is of a square structure, the baking of the battery cells 5 can be realized, and mounting frames 22 are arranged at two ends of the heating plate body 21; the present embodiment is described taking the mounting frame 22 mounted at one end of the heating plate body 21 as an example, and the other end is identical to the current end in structure.

The top of the heating plate body 21 can be also provided with a fire arrow 28, and the rocket head 28 has the function of righting the inclined soft-package cell air bag to incline; if the cell is a square aluminum case cell, rocket head 28 is not required.

A groove 221 adapted to the section of the heating plate body 21 is formed in one side surface of the mounting frame 22 facing the heating plate body 21, so that the end surface of the heating plate body 21 is clamped in the groove 221, and the heating plate body 21 is fixedly connected with the mounting frame 22. The other side surfaces of the upper beam 16 and the lower beam 17 of the mounting frame 22 are respectively provided with a first sliding groove, wherein the first sliding grooves comprise a first upper sliding groove 222 and a first lower sliding groove 223; specifically, a first protrusion, a second protrusion, a third protrusion and a fourth protrusion are sequentially arranged on the other side surface of the mounting frame 22 from top to bottom, a first upper chute 222 is formed between the first protrusion and the second protrusion, a first lower chute 223 is formed between the third protrusion and the fourth protrusion, the position and the size of the first upper chute 222 are matched with those of the upper beam 16, the position and the size of the first lower chute 223 are matched with those of the lower beam 16, so that the upper beam 16 is arranged in the first upper chute 222, the lower beam 17 is arranged in the first lower chute 223, and the mounting frame 22 is further made to slide along the upper beam 16 and the lower beam 17 through the first upper chute 222 and the first lower chute 223 respectively.

The upper pulley 25 is arranged at the first bulge position, the lower pulley 26 is arranged at the fourth bulge position, and the upper pulley 25 and the lower pulley 26 are arranged in a second chute, wherein the second chute comprises a second upper chute 161 and a second lower chute 171; specifically, the second upper chute 161 is disposed at the top of the upper beam 16, and the second upper chute 161 is adapted to the upper pulley 25, so that the upper pulley 25 is disposed in the second upper chute 161; the second lower chute 171 is disposed at the bottom of the lower beam 17, and the second lower chute 171 is adapted to the lower pulley 26, so that the lower pulley 26 is disposed in the second lower chute 171, and the mounting frame 22 slides along the second upper chute 161 and the second lower chute 171 through the upper pulley 25 and the lower pulley 26, respectively. The second lower chute 171 in this embodiment is similar to the second upper chute 161 in construction.

The upper and lower pulleys 25 and 26 may be mounted by a rotation shaft such that the upper and lower pulleys 25 and 26 rotate along the second upper and lower slide grooves 161 and 171, respectively.

In this embodiment, the positions of the upper pulley 25 and the lower pulley 26 of the heating plate body 21 are further provided with mounting blocks, the upper pulley 25 and the lower pulley 26 are arranged on the mounting blocks, and the mounting blocks mainly have positioning function, namely when the heating plate body 21 is fully opened, so that the distance between each of the channels for placing the battery cells is consistent, and the automatic placement of the battery cells is facilitated.

It should be noted that, the number of the heating plate assemblies 2 in this embodiment is at least two, the heating plate assemblies 2 connected with the moving assembly are defined as the first heating plate assembly 2, the last heating plate assembly 2 is sequentially pushed, no roller is disposed on the last heating plate assembly, and the last heating plate assembly 2 is fixedly connected with the second mounting plate 12, so that the last heating plate assembly 2 does not move when the moving assembly drives the heating plate assembly 2 to move.

The first sliding column 23 and the second sliding column 24 are arranged between the mounting frames 22 of the two adjacent heating plate assemblies 2; specifically, the first sliding column 23 and the second sliding column 24 are both equally-spaced sliding columns with the same shape and size, the first sliding column 23 is an up-down equally-spaced sliding column, and the second sliding column 24 is a middle equally-spaced sliding column; the first sliding columns 23 are arranged at the top and the bottom of the two adjacent installation frames 22, and the second sliding columns 24 are arranged at the positions, close to the middle, of the two adjacent installation frames 22; for example, the first mounting frame is connected with the adjacent second mounting frame through the upper and lower two first sliding columns 23, the second mounting frame is connected with the adjacent third mounting frame through the middle two second sliding columns 24, the third mounting frame is connected with the adjacent fourth mounting frame through the upper and lower two first sliding columns 23, the fourth mounting frame is connected with the adjacent fifth mounting frame through the middle two second sliding columns 24, and so on.

The first sliding column 23 and the second sliding column 24 comprise a column body and a column-shaped limiting block, wherein the diameter of the limiting block is larger than that of the column body; the openings 27 matched with the column bodies are formed in the top, the bottom and the positions close to the middle of the mounting frame 22, so that the mounting frame 22 is sleeved in the column bodies through the openings 27 and can slide on the column bodies, and the limiting blocks are used for limiting the mounting frame 22, so that the mounting frame 22 is prevented from falling off in the sliding process of the column bodies.

Note that, the lengths of the first sliding post 23 and the second sliding post 24 may be set according to the thickness of the battery cell 5, which is not limited in this embodiment.

The transmission assembly comprises a driving wheel 31, a driven wheel 32, a rotating shaft 33, a synchronous belt 34, a screw rod 35 and a fixing piece 36.

The position fixed mounting that first mounting panel 11 is close to the top has the installation piece, action wheel 31 sets up in the installation piece below to through mode fixed mounting such as welding in the position that first mounting panel 11 is close to the centre, be equipped with the fixed block in action wheel 31 the dead ahead, fixed block top fixed mounting is on the installation piece, set up the opening with axis of rotation 33 looks adaptation on the fixed block, so that axis of rotation 33 one end passes the opening and is connected with the pivot of action wheel 31, the other end of axis of rotation 33 can be equipped with the handle that is convenient for be used for pivoted, so that the user rotates axis of rotation 33 through the twist grip, and then make axis of rotation 33 drive action wheel 31 and rotate.

An opening matched with the rotating shaft of the driven wheel 32 is formed in the position, close to the two ends, of the first mounting plate 11 and between the upper beam 16 and the lower beam 17, so that one end of the rotating shaft of the driven wheel 32 passes through the opening, and the driven wheel is fixedly mounted on the first mounting plate 11; the fixing members 36 are fixedly mounted on the first mounting plate 11, in this embodiment, four fixing members 36 are preferable, specifically, two fixing members 36 are mounted on two sides of the driving wheel 31, and the other two fixing members 366 are respectively mounted on one side of the driven wheel 32.

The fixing piece 36 is provided with an opening matched with the synchronous belt 34, so that the synchronous belt 34 is wound on the surfaces of the driving wheel 31 and the driven wheel 32 and penetrates through the opening to form a surrounding transmission structure.

In this embodiment, grooves are formed on the driving wheel 31 and the driven wheel 32, and protrusions matched with the grooves are formed on the synchronous belt 34 so that the synchronous belt 34 is meshed with the driving wheel and the driven wheel 32; the fixing piece 36 is used for assisting in fixing the position of the synchronous belt 34, and is used for placing the synchronous belt 34 to deviate; when the driving wheel 31 rotates, the synchronous belt 31 is driven to rotate in the same direction, and when the synchronous belt 31 rotates, the driven wheel 32 is driven to rotate in the same direction.

The fixed column 14 is provided with a mixing port matched with one end of the screw rod, so that one end of the screw rod 35 is clamped in the mounting port, and the other end of the screw rod 35 passes through the rotating shaft connected with the driven wheel 32, so that the screw rod 35 is driven to rotate when the driven wheel 32 rotates.

The length of the screw 35 may be set according to the number of the heat generating plate assemblies, and is not limited to the length shown in the present embodiment.

The moving assembly includes a moving plate 41, a lead screw nut 42, and a moving frame 43.

The moving plate 41 may have a square structure, the moving plate 41 is disposed in the frame body 1 and on one side of the first heating plate component 2, and one side of the moving plate 41 may abut against the mounting frame 22, or may be fixedly connected with the mounting frame 22 by a thread or the like; the other side of the moving plate 41 may be provided with a moving frame 43, where the moving frame 43 is fixedly connected with the moving plate 41 by welding, screwing, etc., and the top and bottom of the moving frame 43 are respectively provided with rollers matched with the second upper chute 161 and the second lower chute 171, so that the rollers can slide along the second upper chute 161 and the second lower chute 171.

The screw nut 42 is fixedly connected with the movable plate 41 in a welding or threaded mode and the like, an opening matched with the screw rod 35 is formed in the screw nut 42, an internal thread is formed in the opening, an external thread matched with the internal thread is formed on the screw rod 35, the screw nut 42 is sleeved on the screw rod 35 through the internal thread, the screw rod 35 rotates to drive the screw nut 42 to move, the movement of the screw nut 42 drives the movable plate 41 and the movable frame 43 to move, the movable plate 41 drives the heating plate assembly 2 to move finally, and compression or expansion among the heating plate assemblies 2 is achieved.

In this embodiment, the temperature control module 6 is further included, the temperature control module 6 is disposed on the first mounting board 11, and the temperature control module 6 is electrically connected with the heating board body 21.

It should be noted that the temperature control structure specifically controls the temperature of the heating plate body according to the existing circuit structure, which is not limited in this embodiment, and the temperature control module and the heating plate body may also adopt the existing structure, which is not described in detail in this embodiment.

The embodiment adopts the equidistant pressurizing type baking fixture technology, solves the problems of bad baking temperature uniformity, long baking time, low energy utilization rate and the like of the battery cell, ensures the baking temperature uniformity of the battery cell, the moisture removal uniformity of the battery cell and the like, and improves the energy utilization rate.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. The device for improving the baking temperature uniformity of the battery cell is characterized by comprising a frame body, a plurality of heating plate components connected with the frame body, a transmission component and a moving component; the plurality of heating plate components are arranged in the frame body, and two ends of the plurality of heating plate components are connected with two sides of the frame body in a sliding manner; the battery core is arranged between two adjacent heating plate components in the plurality of heating plate components; the movable assembly is connected with one side of one heating plate assembly in the plurality of heating plate assemblies, the transmission assembly is arranged at one end of the frame body, and the movable assembly is in sliding connection with the transmission assembly, so that the transmission assembly drives the movable assembly to reciprocate, the movable assembly drives the plurality of heating plate assemblies to move, and then the adjacent two heating plate assemblies are compressed/expanded, and the baking of the battery cell is realized.

2. The device for improving the baking temperature uniformity of a battery cell according to claim 1, wherein the frame body comprises a first mounting plate, a second mounting plate, two side plates and a bottom plate; the two side plates are respectively arranged at two sides of the first mounting plate and the second mounting plate, one ends of the two side plates are connected with the first mounting plate, and the other ends of the two side plates are connected with the second mounting plate; the bottom plate is installed in the below of first mounting panel, second mounting panel, and the one end and the first mounting panel of bottom plate are connected, and the other end and the second mounting panel of bottom plate are connected.

3. The device for improving the baking temperature uniformity of a battery cell according to claim 2, wherein the heating plate assembly comprises a heating plate body and mounting frames arranged at two ends of the heating plate body; a groove matched with the heating plate body is formed in one side of the mounting frame, so that two ends of the heating plate body are arranged in the groove and fixedly connected with the mounting frame; the mounting bracket opposite side has been seted up with the first spout of curb plate looks adaptation to make the curb plate set up in first spout, and then make the mounting bracket slide along the curb plate.

4. The device for improving the baking temperature uniformity of a battery cell according to claim 3, wherein the top and the bottom of the side plate are provided with second sliding grooves, rollers matched with the second sliding grooves are arranged on the other side of the mounting frame close to the top and the bottom of the side plate, and the rollers are arranged in the second sliding grooves so as to drive the mounting frame to move when the rollers slide along the second sliding grooves.

5. A device for improving the uniformity of baking temperature of a battery cell according to claim 3, wherein a sliding column is provided between the mounting frames of the two adjacent heating plate assemblies, so that the heating plate assemblies move along the sliding column.

6. The device for improving the baking temperature uniformity of a battery cell according to claim 5, wherein the sliding column comprises a column body and limiting blocks arranged at two ends of the column body, openings matched with the column body are formed in each of the two adjacent mounting frames, and the openings penetrate through the column body so that the two adjacent mounting frames can move along the column body.

7. The device for improving the baking temperature uniformity of a battery cell according to claim 1, wherein the transmission assembly comprises a driving wheel, a plurality of driven wheels, a rotating shaft connected with the driving wheel, a synchronous belt wound on the driving wheel and the driven wheels, and a screw rod connected with the driven wheels, the driving wheel is arranged at a position, close to the middle, of the first mounting plate, the driven wheels are arranged at positions, close to two ends, of the first mounting plate, the screw rod is arranged on the side surface of the frame body, and the rotating shaft drives the driving wheel to rotate when rotating, so that the driving wheel drives the synchronous belt and the driven wheels to rotate, and the driven wheels drive the screw rod to rotate.

8. The device for improving the baking temperature uniformity of a battery cell according to claim 7, wherein the moving assembly comprises a moving plate and a screw nut fixedly connected with the moving plate, the moving plate is connected with one side of the heating plate assembly, a threaded opening matched with the screw is formed in the middle of the screw nut, the screw nut is sleeved on the screw through the threaded opening, so that the screw nut is driven to move when the screw rotates, the screw nut is driven to move, and the moving plate drives the heating plate assemblies to move.

9. The device for improving baking temperature uniformity of a battery cell according to claim 3, further comprising a temperature control module disposed on the first mounting plate and electrically connected to the heating plate body.

10. A device for improving the uniformity of baking temperature of a battery cell according to claim 3, wherein the top of the heating plate body is further provided with a fire arrow.