CN115295856A

CN115295856A - Electrode assembly hot-pressing equipment and electrode assembly hot-pressing method

Info

Publication number: CN115295856A
Application number: CN202210960648.8A
Authority: CN
Inventors: 陈海峰
Original assignee: Suzhou Zhongke Ruilong Technology Co ltd
Current assignee: Suzhou Zhongke Ruilong Technology Co ltd
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2022-11-04

Abstract

The invention discloses electrode assembly hot-pressing equipment and an electrode assembly hot-pressing method. The carrier is used for carrying at least one electrode assembly, the electrode assembly comprises plate bodies, an insulating glue layer and electrodes which are stacked, and the carrier fixes the outer edges of the plate bodies; the pressure head assembly comprises a first hot pressing head and a second hot pressing head which are respectively positioned at two sides of the carrier; and the lifting pressing device is used for driving the first hot pressing head and/or the second hot pressing head to move so that the first hot pressing head and the second hot pressing head press the electrode assembly from two sides. According to the invention, the first hot pressing head and the second hot pressing head press the electrode assembly on the carrier from two sides, and the electrode assembly and two sides of the insulating glue layer in the electrode assembly are heated, so that the insulating glue layer is heated quickly to connect the plate body and the electrode, thereby improving the connection quality and improving the connection strength of each part of the electrode assembly.

Description

Electrode assembly hot-pressing equipment and electrode assembly hot-pressing method

Technical Field

The invention relates to the technical field of battery manufacturing, in particular to electrode assembly hot-pressing equipment and an electrode assembly hot-pressing method.

Background

As shown in fig. 1 and 2, fig. 1 and 2 illustrate an electrode assembly 1 of a button cell, which includes a plate body 10, an electrode 12, and an insulating adhesive layer 11 connected between the electrode 12 and the plate body 10, wherein the plate body 10 is provided with a central hole 13, and the electrode 10 is provided with an electrode post 15 penetrating into the first central hole 13. The insulating adhesive layer 11 is hot melt adhesive, and the plate body 10 and the electrode 12 are connected in a hot pressing mode.

In the prior art, a simple hot-pressing device is usually adopted to press the electrode assembly, during hot pressing, a hot-pressing head is driven to press the electrode assembly 1 from the top downwards by manual control driving or a power device such as an air cylinder, a hydraulic cylinder and the like to apply pressure to the electrode assembly 1, the pressure fluctuation of the electrode assembly 1 is large, and the hot-pressing time is usually controlled according to the experience of workers, so that the quality of the manufactured electrode assembly is different.

The above hot pressing method has many disadvantages, for example, the connection between the plate body 10 and the electrode 12 is not firm, and the connection force of different electrode assemblies 1 fluctuates greatly; for another example, the outer edge of the insulating adhesive layer 11 is easily excessively extended beyond the outer edge of the electrode 12, which causes burning of the insulating adhesive layer 11 during subsequent welding of the plate body 10; for another example, some of the inner edges of the layer of insulating glue 11 may even extend from the first central hole 13 to the outer surface of the plate body 10, which may adversely affect the appearance and the performance.

Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

Disclosure of Invention

The invention aims to provide electrode assembly hot-pressing equipment and an electrode assembly hot-pressing method, and the connection strength of each part of the manufactured electrode assembly is higher.

To achieve the above object, in one aspect, the present invention provides an electrode assembly hot pressing apparatus, comprising:

the carrier is used for carrying at least one electrode assembly, the electrode assembly comprises plate bodies, an insulating glue layer and electrodes which are stacked, and the carrier fixes the outer edges of the plate bodies;

the pressure head assembly comprises a first hot pressing head and a second hot pressing head which are respectively positioned at two sides of the carrier; and the number of the first and second groups,

and the lifting pressing device is used for driving the first hot pressing head and/or the second hot pressing head to move so that the first hot pressing head and the second hot pressing head press the electrode assembly from two sides.

Further, electrode subassembly hot pressing equipment still include with lift compression fittings, first hot pressing head with the controller that the second hot pressing head electricity is connected, the controller is used for controlling first hot pressing head with the first pressfitting of second hot pressing head electrode subassembly's time and first hot pressing head with the temperature of second hot pressing head.

Further, the carrier includes first support plate and second support plate, first support plate is equipped with and is used for supporting the annular boss of plate body outer fringe, the second support plate be equipped with the cooperation of annular boss is fixed the clamping ring of the outer fringe of plate body, the clamping ring with annular boss coaxial line sets up, the electrode join in marriage in the clamping ring.

Further, the carrier still include with the first through-hole that annular boss coaxial line set up, the plate body connect in the first through-hole, the clamping ring extends to in the first through-hole and with the outer fringe butt of plate body.

Further, the first hot-pressing head comprises a first hot-pressing block and a first heating device for heating the first hot-pressing block, the first hot-pressing block comprises a first heating column protruding outwards, and the first heating column is arranged corresponding to the pressing ring;

the second hot pressing head comprises a second hot pressing block and a second heating device used for heating the second hot pressing block, the second hot pressing block comprises a second heating column protruding outwards, and the second heating column corresponds to the annular boss.

And when the electrode assembly is pressed, the first heating column and the second heating column are matched to press the electrode assembly.

Furthermore, the electrode assembly hot-pressing device further comprises a frame, the frame comprises a platen, the lifting press-fit device comprises a first guide shaft connected to the platen, a lifting plate located above the platen and connected with the first guide shaft in a sliding mode, a floating carrying platform located between the platen and the lifting plate and connected with the first guide shaft in a sliding mode, and an elastic supporting piece connected between the floating carrying platform and the platen, the carrier is located on the floating carrying platform, the first hot-pressing head is connected to the lifting plate, the second hot-pressing head is connected to the platen, and the lifting press-fit device further comprises a first driving device connected with the frame and used for driving the lifting plate to move up and down.

Furthermore, the lifting pressing device further comprises a fixing ring connected with the first guide shaft, and the fixing ring is used for limiting the highest position of the floating carrying platform.

Furthermore, the lifting press-fit device further comprises a pressing component connected with the lifting plate, in the descending process of the lifting plate, the first hot pressing head is firstly contacted with the electrode component, and then the pressing component is abutted against the floating carrying platform and drives the floating carrying platform to descend.

Furthermore, the pushing assembly comprises a connecting column connected with the lifting plate and a fixing piece connected to the connecting column, the height of the fixing piece on the connecting column is adjustable, and the pushing assembly is abutted to the floating carrier platform through the fixing piece and drives the floating carrier platform to descend.

Furthermore, the electrode assembly hot-pressing equipment also comprises a longitudinal positioning assembly driven by the lifting plate to lift, wherein in the descending process of the lifting plate, the longitudinal positioning assembly is firstly contacted with the carrier, the carrier is pressed on the floating carrying platform, and then the first hot-pressing head is contacted with the electrode assembly.

Furthermore, the longitudinal positioning assembly comprises a cross beam connected with the connecting column, an ejector rod connected with the cross beam in a sliding and matching mode, a fixed block connected with the cross beam and an elastic piece connected between the fixed block and the ejector rod, and the ejector rod is pressed by the elastic piece towards the side where the carrier is located.

Furthermore, the electrode assembly hot-pressing device further comprises a horizontal positioning assembly, the horizontal positioning assembly is used for positioning the carrier at the position of the floating carrying platform in the horizontal direction, the horizontal positioning assembly comprises a first guide rail and a second guide rail which are arranged on the floating carrying platform at intervals, a first guide groove is formed between the first guide rail and the second guide rail, and the carrier is in sliding fit with the first guide groove.

Furthermore, the first guide rail is provided with a notch communicated with the first guide groove, a positioning groove is formed in the side face of the carrier, the horizontal positioning assembly comprises a second driving device and an insertion block connected with the second driving device, at least part of the insertion block is matched with the positioning groove, and the second driving device is used for driving the insertion block to be inserted into the positioning groove.

Further, the electrode assembly hot-pressing equipment further comprises a feeding assembly, the feeding assembly comprises a feeding carrying platform and a third driving device, the feeding carrying platform is provided with a second guide groove in butt joint with the first guide groove, and the third driving device is used for driving the carrier in the second guide groove to move into the first guide groove.

Furthermore, the electrode assembly hot-pressing equipment further comprises a discharging carrying table, the discharging carrying table is provided with a third guide groove in butt joint with the first guide groove, and the third driving device is used for driving the carrier in the first guide groove to move into the third guide groove.

Further, the electrode assembly hot-pressing equipment comprises a pressing amount adjusting assembly, and the pressing amount adjusting assembly controls the pressing amount of the electrode assembly by controlling the distance between the first hot-pressing head and the second hot-pressing head when the electrode assembly is pressed.

Further, the pressing amount adjusting assembly controls the distance between the first hot pressing head and the second hot pressing head when the electrode assembly is pressed by controlling the lowest position of the first hot pressing head;

the pressing amount adjusting assembly comprises a first limiting piece connected to the lifting plate, and when the first limiting piece descends to abut against the bedplate, the first hot pressing head is located at the lowest position; or,

the pressing amount adjusting assembly comprises a second limiting piece connected to the bedplate, and when the lifting plate descends to abut against the second limiting piece, the first hot pressing head is located at the lowest position; or,

the pressing amount adjusting assembly comprises a first limiting part connected to the lifting plate and a second limiting part connected to the bedplate, and when the first limiting part descends to abut against the second limiting part, the first hot pressing head is located at the lowest position.

Furthermore, the rack comprises a mounting plate positioned above the lifting plate, the first driving device comprises a body connected with the mounting plate and a driving rod which makes telescopic motion relative to the body, and the driving rod is connected with the lifting plate;

the pressfitting volume adjusting part is through control the extreme lower position control that first hot pressing head descends is in the pressfitting during the electrode subassembly distance between first hot pressing head and the second hot pressing head, its include with the mounting panel slides the second guiding axle that connects, second guiding axle one end through first connecting piece with the actuating lever links to each other, and the other end is connected with the second connecting piece, pressfitting volume adjusting part is still including being located the third locating part of body top works as the third locating part with during the body contact, first hot pressing head is located the extreme lower position.

In another aspect, the present invention further provides a hot pressing method of an electrode assembly, including the steps of:

fixing the outer edge of an electrode assembly by a carrier, wherein the electrode assembly comprises plate bodies, an insulating glue layer and electrodes which are stacked;

driving a first hot pressing head and a second hot pressing head to press the electrode assembly on the carrier from two sides;

and driving the first hot pressing head and the second hot pressing head to be separated from the electrode assembly after the pressure maintaining for a preset time.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the first hot pressing head and the second hot pressing head press the electrode assembly on the carrier from two sides, and the electrode assembly and two sides of the insulating glue layer in the electrode assembly are heated, so that the insulating glue layer is heated quickly to connect the plate body and the electrode, the connection quality is improved, and the connection strength of each part of the electrode assembly is enhanced.

2. As an improvement, the controller is arranged to control the time and the temperature for pressing the electrode assembly, so that the quality of the electrode assembly is further improved, the bonding between the insulating glue layer and the plate body and between the insulating glue layer and the electrode is firmer, meanwhile, the interference of subjective factors of people can be eliminated, the production efficiency of the electrode assembly is improved, and the consistency of the performance of the manufactured electrode assembly is ensured.

3. As the improvement, through carrier location electrode subassembly, can effectually improve the position accuracy between each part of electrode subassembly to improve the size precision and the quality of the electrode subassembly that makes, simultaneously, the second support plate of carrier is provided with the clamping ring, and insulating glue film and electrode are located the clamping ring, and the clamping ring can restrict the distance that insulating glue film outwards extended after the pressfitting, thereby effectual assurance insulating glue film is excessive outwards to be extended, is favorable to the welding operation of follow-up plate body.

4. As improvement, the pressing amount of the electrode assembly is controlled by arranging the pressing amount adjusting assembly, so that the situation that the outer edge and the inner edge of the insulating adhesive layer extend excessively due to excessive extrusion of the insulating adhesive layer is prevented, and the quality, the yield and the consistency of the performance of the electrode assembly are effectively improved.

5. As an improvement, the position of the carrier in the longitudinal direction and the horizontal direction is limited by arranging the longitudinal positioning assembly and the horizontal positioning assembly, so that the position accuracy of the carrier on the floating carrier is higher, the reliable operation of equipment is facilitated, and the quality of the manufactured electrode assembly is improved.

Drawings

Fig. 1 is an exploded view of an electrode assembly according to an embodiment of the present invention.

Fig. 2 is a sectional view of the electrode assembly shown in fig. 1.

Figure 3 is a schematic view of the position of the ram assembly and carrier in accordance with one embodiment of the present invention.

Fig. 4 is a perspective cross-sectional view of the structure shown in fig. 3.

Fig. 5 is a schematic structural diagram of a carrier according to an embodiment of the present invention, in which the carrier carries an electrode assembly.

Fig. 6 is an exploded view of the vehicle shown in fig. 5.

Fig. 7 is a cross-sectional view of the carrier shown in fig. 5.

Fig. 8 is an enlarged view of a portion I in fig. 7.

Fig. 9 is a schematic structural diagram of a first thermal compression head according to an embodiment of the present invention.

Fig. 10 is a schematic structural view of an electrode assembly hot pressing apparatus according to an embodiment of the present invention.

Fig. 11 is a schematic structural diagram of the lifting plate, floating stage and platen portion of the electrode assembly hot press apparatus in accordance with one embodiment of the present invention.

Figure 12 is a schematic diagram of the position of the ram assembly, floating carrier, and carrier in accordance with one embodiment of the present invention.

Fig. 13 is a schematic structural diagram of a floating stage, a pressing assembly, a horizontal positioning assembly, and a vertical positioning assembly according to an embodiment of the invention.

FIG. 14 is a schematic view of a longitudinal positioning assembly according to an embodiment of the present invention.

Fig. 15 is a schematic structural diagram of the horizontal positioning assembly and the floating carrier in connection with one embodiment of the present invention.

Fig. 16 is a cross-sectional view of the attachment of the horizontal positioning assembly to the floating carrier in accordance with one embodiment of the present invention.

Fig. 17 is an enlarged view of a portion II in fig. 16.

Fig. 18 is a perspective view of the structure of fig. 11 with an infeed assembly and an outfeed stage.

FIG. 19 is a top schematic view of an infeed assembly, horizontal positioning assembly, and outfeed assembly of an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application. It should be further noted that, for the convenience of description, only some of the structures associated with the present application are shown in the drawings, not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

An electrode assembly hot pressing apparatus according to a preferred embodiment of the present invention includes a carrier 2, a pressing head assembly, and a lifting pressing device.

The carrier 2 is used for carrying at least one electrode assembly 1, and the electrode assembly 1 is supported and limited by the carrier 2, so that the electrode assembly can be pressed with higher precision. As shown in fig. 1 and 2, the electrode assembly 1 includes a plate body 10, an electrode 12, and an insulating adhesive layer 11 sandwiched between the plate body 10 and the electrode 12, and the plate body 10, the insulating adhesive layer 11, and the electrode 12 are each substantially in the shape of a thin sheet, and it is understood that the plate body 10, the electrode 12, and the insulating adhesive layer 11 are separate bodies and are not joined together when the electrode assembly 1 is not pressed. In a preferred embodiment, the plate body 10 is made of an alloy, such as stainless steel, the electrode 12 is made of an aluminum alloy, and the insulating adhesive layer 11 is a hot melt adhesive.

The plate body 10 and the insulating glue layer 11 are respectively provided with a first central hole 13 and a second central hole 14, and the electrode 12 is provided with an electrode column 15 penetrating through the two central holes. The plate body 10, the electrode 12 and the insulating glue layer 11 are coaxially arranged, the size of the plate body 10 is largest, the outer edge of the plate body exceeds the insulating glue layer 11 and the electrode 12, and the carrier 2 is used for fixing the outer edge of the plate body 10 and is provided with avoidance spaces positioned above and below the electrode assembly 1 so as to expose the electrode 12 and the part of the plate body 10 corresponding to the electrode 12 for the contact and hot pressing of a press head assembly.

In the present embodiment, the outer contours of the plate body 10, the insulating adhesive layer 11 and the electrode 12 are all circular, and it is understood that in other embodiments, the plate body 10, the insulating adhesive layer 11 and the electrode 12 may also be in other shapes, such as rectangular, and at this time, the shape of the portion of the carrier 2 for mounting the electrode assembly 1 may be changed adaptively.

As shown in fig. 3 and 4, the indenter assembly includes a first thermal pressing head 40 and a second thermal pressing head 41 respectively located at both sides of the carrier 2, and the first thermal pressing head 40 and the second thermal pressing head 41 can generate heat to heat the insulating adhesive layer 11 to bond with the board body 10 and the electrode 12.

The lifting pressing device is used for driving the first hot pressing head 40 and/or the second hot pressing head 41 to move so that the first hot pressing head and the second hot pressing head approach each other, so as to press the electrode assembly 1 on the carrier 2 from two sides. The lifting and pressing device can drive the first thermal pressing head 40 to move toward the second thermal pressing head 41, for example, and after the first thermal pressing head 40 contacts the electrode assembly 1 (via the first thermal pressing head 40 or other components), the carrier 2 is driven to move toward the second thermal pressing head 41, so that the first thermal pressing head 40 and the second thermal pressing head 41 cooperate to clamp the electrode assembly 1 from two sides. For another example, the carrier 2 may be fixed, and the lifting and pressing device drives the two thermal pressing heads to move toward the carrier 2 from two sides until the two thermal pressing heads cooperate to clamp the electrode assembly 1 from two sides.

Since the first and second thermal pressing

heads

40 and 41 clamp the electrode assembly 1 from both sides when the electrode assembly 1 is thermally pressed, both sides of the electrode assembly 1 can be heated simultaneously, and the thermal conductivity is high, so that both sides of the insulating adhesive layer 11 can be heated uniformly and rapidly, and the bonding between the insulating adhesive layer and the plate body 10 and the electrode 12 after being heated and melted is more firm, and the connection strength of the electrode assembly 1 is higher.

In some embodiments, as shown in fig. 5 and fig. 6, the carrier 2 includes a first carrier 20 and a second carrier 21, the first carrier 20 is provided with a positioning post 203, the second carrier 21 is provided with a positioning hole 211 corresponding to the positioning post 203, and when the positioning post 203 and the positioning hole 211 of the second carrier 21 are mated, the positioning is achieved by the positioning post 203 and the positioning hole 211.

Referring to fig. 7 and 8, the first carrier plate 20 is provided with an annular boss 200 for supporting the outer edge of the plate body 10, and a first through hole 201 and a second through hole 202 respectively provided at both sides of the annular boss 200, the first through hole 201, and the second through hole 202 are coaxially provided, and a first inner hole 2000 of the annular boss 200 communicates with the first through hole 201 and the second through hole 202. The second carrier plate 21 is provided with a press ring 210 extending into the first through hole 201, and a second inner hole 2100 of the press ring 210 is communicated with the upper and lower sides of the second carrier plate 21.

When the electrode assembly 1 is positioned on the carrier 2, the plate body 1 is first placed in the first through hole 201 and supported by the annular boss 201, and the plate body 1 and the first through hole 201 are adapted to be positioned through the first through hole 201. After placing the board 1, the second carrier 21 is stacked on the first carrier 20 such that the press ring 210 extends into the first through hole 201 and abuts against the outer edge of the press ring 210, so that the press ring 210 is fixed between the first carrier 20 and the second carrier 21. The press ring 210 is matched with the first through hole 201, and the press ring and the first through hole are coaxially arranged. Then, the insulating adhesive layer 11 and the electrode 12 are sequentially placed in the pressing ring 210, so that the plate body 10, the insulating adhesive layer 11 and the electrode 12 are stacked from bottom to top. The electrode 12 is fitted into the second inner hole 2100 of the press ring 210 and can be positioned through the second inner hole 2100, and the diameter of the insulating glue layer 11 is generally slightly smaller than that of the electrode 12, so that the electrode can also be positioned through the second inner hole 2100 with higher accuracy. Thus, when the plate body 10, the insulating adhesive layer 11 and the electrode 12 are all installed on the carrier 2, the three can be positioned by the carrier 2, high-precision coaxial positioning is kept, and after subsequent pressing, the electrode assembly 1 with higher precision and better quality can be obtained.

It will be appreciated that the second inner bore 2100 of the press ring 210 can define the maximum outer circumferential position of the layer of insulation paste 11, and that when the layer of insulation paste 11 is subjected to hot pressing to spread outwardly, the press ring 210 can limit the maximum size of the outwardly spread layer of insulation paste 11, thereby preventing excessive outwardly spreading of the layer of insulation paste 11.

In some embodiments, as shown in fig. 9, the first thermal compression head 40 includes a first thermal compression block 400 and a first heating device 401, the first thermal compression block 400 is provided with a convex first heating column 4000, and the first heating column 4000 is disposed corresponding to the compression ring 210. It can be understood that the carrier 2 may carry a plurality of electrode assemblies 1, in the structure shown in the drawing, six electrode assemblies 1 are disposed on the carrier 2, and the number of the first heating columns 4000 is the same as the number of the electrode assemblies 1, and the positions of the first heating columns correspond to each other, so that the first heating columns 4000 can extend into the pressing ring 210 to abut against the plurality of electrode assemblies 1 at the same time.

The first hot-pressing block 400 and the first heating column 4000 thereon are made of a material having high heat conduction efficiency, such as stainless steel, aluminum alloy, copper, etc. The first heating device 401 is used to heat the first hot press block 400, including but not limited to electrical heating, steam heating, or liquid heating, so that the first heating column 4000 has a suitable temperature, and the connection strength of the electrode assembly 1 is higher when the electrode assembly 1 is pressed. Preferably, the first heating device 401 is an electric heating device, such as a resistance wire, a heating rod, etc., and in this embodiment, the first heating device 401 is a heating rod, which is inserted into the first hot-pressing block 400.

The second thermal compression head 41 has a structure similar to that of the first thermal compression head 40, and referring to fig. 3 and 4, it includes a second thermal compression block 410 and a second heating device 411 for heating the second thermal compression block 410, the second thermal compression block 410 is provided with a second heating column 4100 protruding outward, the second heating column 4100 is provided corresponding to the second through hole 202 and the annular boss 200, so that the second heating column 4100 can be abutted to the electrode assembly 1 through the second through hole 202 and the first inner hole 2000 of the annular boss 200. The number and positions of the second heating columns 4100 are also the same as those of the electrode assemblies 1 on the carrier 2, so that the first heating columns 4000 can be matched to simultaneously press a plurality of electrode assemblies 1.

When the lifting and pressing device drives the first and second thermal pressing

heads

40 and 41 to approach each other, the first heating column 4000 extends into the pressing ring 210, and the second heating column 4100 extends into the annular boss 200 through the second through hole 202, thereby pressing the electrode assembly 1 from both sides. It will be appreciated that the second bore 202 can be configured to avoid the second heating column 4100, reducing the length of the first bore 2000 requiring greater machining accuracy and surface quality, which can be beneficial in reducing costs. In other embodiments, the second through hole 202 may be eliminated, and the first inner hole 2000 extends directly to the outer surface of the first carrier plate 20.

The lifting stitching device includes a first driving device 55 (see fig. 10), where the first driving device 55 may be a driving device with a power source being pneumatic, hydraulic, or electric, such as a cylinder, a hydraulic cylinder, an electric cylinder, or the like, or a driving device with a motor combined with a transmission mechanism (e.g., formed by combining one or more of a gear, a rack, a worm, a link mechanism, and the like). The first driving device 55 is used for providing power for driving the first hot pressing head 40 and the second hot pressing head 41 to press the electrode assembly 1 on the carrier 2 from two sides.

Further, the electrode assembly hot-pressing device also comprises a controller, and the controller is used for controlling the electrode assembly hot-pressing device to work. The controller is electrically connected to the lifting and pressing device (specifically, the first driving device 55 thereof), can control the operation of the first driving device 55, for example, can control the time (dwell time) for the first thermal pressing head 40 and the second thermal pressing head 41 to press the electrode assembly 1, and is also electrically connected to the first thermal pressing head 40 and the second thermal pressing head 41, specifically, electrically connected to the first heating device 401 and the second heating device 411, and can control the heating device to generate heat, preferably, the controller can control the temperature of the heating device, for example, temperature sensors for detecting the first heating column 4000 and the second heating column 4100 may be provided, and when the detected temperature exceeds a preset value, the current is reduced or stopped to reduce the heat generation amount, and when the temperature is lower than the preset value, the current is turned on or increased to increase the heat generation amount.

The controller can simplify the operation and improve the automation degree of the equipment, parameters such as pressure maintaining time, hot pressing temperature and the like after the electrode assembly 1 is pressed can be controlled, the high-precision positioning of the electrode assembly 1 on the carrier 2 is combined, the quality of the manufactured electrode assembly 1 can be effectively improved, and the quality and the performance of the produced electrode assembly 1 are better in consistency.

As shown in fig. 10, fig. 10 shows an electrode assembly hot pressing apparatus according to a preferred embodiment, wherein a first hot pressing head 40 and a second hot pressing head 41 are respectively located at upper and lower sides of a carrier 2, and after the first hot pressing head 40 moves a distance towards the second hot pressing head 41, the carrier 2 is driven to move towards the second hot pressing head 41 at the same time, so that the two hot pressing heads press an electrode assembly 1 on the carrier 2.

Specifically, referring to fig. 10 to 12, the frame 6 of the electrode assembly hot press apparatus includes a platen 60, and the second hot press head 41 is connected to the platen 60. The lifting and pressing device comprises a first guide shaft 51 fixedly connected to the bedplate 60, a lifting plate 52 positioned above the bedplate 60 and slidably coupled with the first guide shaft 51, a floating platform 53 positioned between the bedplate 60 and the lifting plate 52 and slidably coupled with the first guide shaft 51, and an elastic support 54 connected between the floating platform 53 and the bedplate 60.

The first guide shafts 51 are fixedly connected to the bedplate 60, the number of the first guide shafts is four, and the lifting plate 52 and the first guide shafts 51 can be connected through linear bearings. The lifting plate 52 is connected with a first driving device 55, the first driving device 55 drives the lifting plate to move up and down along the first guide shaft 51, and the first hot pressing head 40 is connected with the lifting plate 52, is located below the lifting plate 52 and can move synchronously with the lifting plate 52. It can be understood that the first hot-pressing head 40 and the second hot-pressing head 41 can both be connected with the thermal insulation block 42, the first hot-pressing head 40 is connected with the lifting plate 52 through the thermal insulation block 42, the second hot-pressing head 41 is connected with the bedplate 60 through the thermal insulation block 42, the thermal insulation block 42 is made of materials with poor heat conduction effect such as bakelite, and thus the thermal insulation block 42 can separate the hot-pressing heads, prevent the hot-pressing heads from being in direct contact with other materials with good heat conduction effect, thereby reducing the influence of the heat of the hot-pressing heads on other components, reducing the loss of heat, being beneficial to keeping the temperature of the hot-pressing heads, and being more energy-saving.

The floating stage 53 and the first guide shaft 51 can be connected by a linear bearing, and can slide along the first guide shaft 51, and the floating stage 53 is provided with an escape cavity 520, so that the second thermal compression head 41 can contact the electrode assembly 1 in the carrier 2. The elastic support 54 is supported below the floating stage 53, and can provide an elastic force for driving the floating stage 53 to move up and return. In a preferred embodiment, the elastic support 54 is a spring, which is fitted around the first guide shaft 51, and both ends of which are respectively in contact with the platen 5 and the floating stage 53. The carrier 2 is positioned on the floating stage 53 and can be raised and lowered as the floating stage 53 is raised and lowered.

The lifting press-fit device further comprises a pressing component for pressing the floating carrying platform 53, the pressing component is connected with the lifting plate 52 and can move along with the lifting plate 52, in the process that the lifting plate 52 descends, the first hot pressing head 40 is firstly contacted with the electrode assembly 1, then the pressing component is contacted with the floating carrying platform 53 to drive the floating carrying platform 53 to press downwards, for example, when the first hot pressing head 40 presses the electrode assembly 1 for 0.1mm, the pressing component is contacted with the floating carrying platform 53, and then the pressing component, the floating carrying platform 53, the carrier 2 and the first hot pressing head 40 synchronously move downwards.

As a preferred embodiment, as shown in fig. 11, the pressing assembly includes four connecting posts 56 connected to the lifting plate 52 and four fixing members 57 connected to the connecting posts 56, and the connecting posts 56 are inserted into the floating carrier 53. The fixing member 57 is located above the floating stage 53, and when the lifting plate 52 descends, the distance between the fixing member 57 and the floating stage 53 gradually decreases, and finally abuts against the floating stage 53 to drive the floating stage 53 to descend. Preferably, the height of the fixing member 57 above the connection post 56 is adjustable, so that the pressing distance of the first thermal compression head 40 against the electrode assembly 1 can be adjusted by adjusting the height of the fixing member 57 above the connection post 56, thereby adjusting the amount of pressing of the two thermal compression heads against the electrode assembly 1.

In order to improve the positional accuracy of the carrier 2 on the floating stage 53, the electrode assembly hot press apparatus is provided with a horizontal positioning assembly 71 for positioning the carrier 2 in the horizontal direction and a longitudinal positioning assembly 70 for positioning the carrier 2 in the vertical direction. The horizontal positioning member 71 may be positioned by a positioning pin or the like, and the carrier 2 may be manually placed on the positioning pin for positioning. The longitudinal positioning assembly 70 is used for pressing the carrier 2, so that the carrier 2 is tightly attached to the floating carrier 53, thereby reducing the position error of the carrier 2 caused by inclination in the vertical direction or shaking in the descending process, and effectively ensuring the position accuracy of the carrier 2.

As a preferred embodiment, the longitudinal positioning assembly 70 is connected to the connecting column 56, or connected to the lifting plate 52, or connected to both the connecting column 56 and the lifting plate 52, as shown in fig. 13, in this embodiment, the longitudinal positioning assembly 70 is connected to the connecting column 56, and is driven by the lifting plate 52 to lift, and in the process of lowering the lifting plate 52, the longitudinal positioning assembly 70 first contacts with the carrier 2 to press the carrier 2 on the floating carrier 53, and then the first thermal pressing head 40 contacts with the electrode assembly 1, so that the longitudinal positioning of the carrier 2 can be realized by using the lowering action of the lifting plate 52, and the carrier 2 does not need to be manually longitudinally positioned, which is beneficial to realizing automation.

As shown in fig. 13 and 14, the longitudinal positioning assembly 70 includes a cross member 700 connected to the connecting column 56, a push rod 701 slidably coupled to the cross member 700, a fixing block 703 connected to the cross member 700, and an elastic member 702 connected to the push rod 701. Preferably, the beam 700 is connected to two connecting columns 56 at the same time, so that the beam 700 has a short hanging length and is better in stress performance. The fixing block 703 is provided with a protrusion 7030 extending above the top rod 701, and two ends of the elastic member 702 are respectively abutted against the protrusion 7030 and the top rod 701, and exert a downward elastic force on the top rod 701. As shown in fig. 14, the top bar 701 has a limit block 7010 protruding laterally to above the cross beam 700, and the top bar 701 can be prevented from falling off the cross beam 700 by the limit block 7010. Initially, the ejector rod 701 is located right above the carrier 2, and along with the descending of the lifting plate 52 and the connecting column 56, the ejector rod 701 descends to abut against the carrier 2 and tightly presses the carrier 2 under the elastic force of the elastic piece 702, and due to the arrangement of the elastic piece 702, the pressure of the ejector rod 701 on the carrier 2 cannot be too large, and the use is more reliable. The elastic member 702 is preferably a spring, and the pressing force of the carrier 2 by the push rod 701 can be changed by replacing the spring with a different elastic coefficient.

It can be understood that, in addition to compressing carrier 2 onto floating carrier 53, longitudinal positioning assembly 70 can also compress second carrier 21 onto first carrier 20, so that pressing ring 210 is pressed more tightly against the outer edge of plate 10, and thus, when electrode assembly 1 is pressed by the pressing head assembly, insulating adhesive layer 11 can be reliably blocked by pressing ring 210, and will not overflow between pressing ring 210 and the outer edge of plate 10, which is beneficial to further ensure the quality of manufactured electrode assembly 1.

In some embodiments, as shown in fig. 15 to 17, the horizontal positioning assembly 71 includes a first guide rail 714 and a second guide rail 715 arranged on the floating carrier 53, the first guide rail 714 and the second guide rail 715 are arranged in parallel and spaced apart, a first guide slot 716 is formed between the first guide rail 714 and the second guide rail 715, the first guide slot 716 is in clearance fit with the carrier 2, and the carrier 2 is slidably fitted in the first guide slot 716 and can slide along the first guide slot 716. The position of the carrier 2 in the Y direction (horizontal direction perpendicular to the rails) can be preliminarily defined by the cooperation of the first rail 714 and the second rail 715 with the carrier 2.

Further, the first guide rail 714 is provided with a notch 7140 communicating with the first guide groove 716, a positioning groove 22 is provided on a side surface of the carrier 2, and specifically, the positioning groove 22 is provided on a side surface of the first carrier 20. The horizontal positioning assembly 71 further includes a second driving device 710 connected to the floating stage 53 and an insert block 711 driven by the second driving device 710 to move linearly, the second driving device 710 is configured to drive the insert block 711 to move along a direction perpendicular to the first guide groove 716 (i.e., Y direction), so as to drive the insert block 7 to be inserted into the first guide groove 716 through the notch 7140, when the insert block 711 is inserted into the positioning groove 22 of the carrier 2 in the first guide groove 716, the position of the carrier 2 in the X direction is limited, and the carrier 2 is pressed against the second guide rail 715, so that the carrier 2 is positioned in the horizontal direction with high precision.

In order to facilitate the insertion of the insertion block 711 into the positioning groove 22, the opening end of the positioning groove 22 is provided with the guide inclined plane 220, and the two opposite guide inclined planes 220 are flared, so that the insertion block 711 can be inserted into the positioning groove 22 to position the carrier 2 even if the insertion block 711 and the positioning groove 22 are misaligned in the X direction. It will be appreciated that the insert 711 is at least partially adapted to the positioning slot 22 to position the carrier 2, and in the embodiment shown in fig. 17, the shape of the end of the insert 711 completely corresponds to the shape of the positioning slot 22. In order to improve the motion accuracy of the insert block 711, the horizontal positioning assembly 71 further includes a guide block 712 connected to the floating stage 53, a second guide hole 713 matched with the insert block 711 is formed between the guide block 712 and the floating stage 53, and the second guide hole 713 is aligned with the notch 7140, so that the insert block 711 can be accurately inserted into the carrier 2 through the notch 7140.

Through the matching and connecting positioning of the insertion block 711 and the positioning groove 22 and the fitting positioning of the carrier 2 and the second guide rail 715, the position accuracy of the carrier 2 on the floating carrier 53 is higher, and the carrier 2 is well fixed and is not easy to loosen and move, so that when in hot-pressing fitting, the two hot-pressing heads can accurately press the electrode assembly 1 on the carrier 2, and the hot-pressing quality is better.

It is understood that the type of the second driving device 710 is not limited as long as the second driving device 710 can drive the insertion block 711 to reciprocate linearly, and preferably, the second driving device 710 is an air cylinder, an electric cylinder, or an electric push rod.

In some embodiments, the electrode assembly hot-pressing apparatus further includes a feeding assembly 80, and the feeding assembly 80 is used to achieve automatic feeding of the carrier 2. As shown in fig. 18 and 19, the feeding assembly 80 includes a feeding stage 800 connected to the platen 60 and a third driving device 801 connected to the feeding stage 800. The feeding carrier 800 has a second guide slot 802 abutting against the first guide slot 716, and the carrier 2 is slidably coupled to the second guide slot 802, can move in the second guide slot 802, and moves into the first guide slot 716 along the second guide slot 802. The third driving device 801 may drive the carrier 2 to move linearly, and the type of the third driving device is not limited as long as the third driving device can drive the insert block 711 to move linearly in a reciprocating manner, and the second driving device 710 is preferably an air cylinder, an electric cylinder, or an electric push rod. The third driving device 801 shown in fig. 18 and fig. 19 is an air cylinder, when the air cylinder shaft extends, the carrier 2 located in the second guide groove 802 is pushed to move along the second guide groove 802 into the first guide groove 801, when the air cylinder extends to the limit position or is pushed to the preset position, the positioning groove 22 of the carrier 2 is aligned with the insert block 71, and after the second driving device 710 extends, the insert block 71 is mated with the positioning groove 22, so that the positioning of the carrier 2 on the floating carrier 53 is realized.

The step of placing the carrier 2 into the second guiding slot 802 may be performed manually, or may be performed by other automated devices, for example, a robot gripping the carrier 2 and then placing the carrier into the second guiding slot 802. Because the feeding assembly 80 can automatically move the carrier 2 in the second guide groove 802 to the floating carrying platform 53, the carrier 2 does not need to be manually placed on the floating carrying platform 53 for positioning, the placement and the positioning of the carrier 2 are more convenient, and the operation is safer.

As shown in fig. 16 and 17, the first guide rail 714 is provided with a first guide hole 7141 communicated with the first guide groove 716, the horizontal positioning assembly 71 further includes a mounting block 717 connected with the first guide rail 714, a pushing block 718 slidably coupled with the first guide hole 7141, and a spring 719 connected between the mounting block 717 and the pushing block 718, two ends of the spring 719 respectively abut against the mounting block 717 and the pushing block 718, and the spring applies a pushing force to the pushing block 718 moving towards the first guide groove 716, so that the pushing block 718 partially extends into the first guide groove 716. The end of the pushing block 718 is provided with a slant face 7180 at least facing the side where the carrier 2 enters, so that when the carrier 2 moves to the pushing block 718 in the first guiding groove 716, the pushing block 718 can be pressed by the slant face 7180 to retract the pushing block 718. Meanwhile, the spring 719 can apply elastic force to the pushing block 718 to drive the carrier 2 to be attached to the second guide rail 715, so that pre-positioning is realized.

Because the ejector pad 718 can automatically drive the carrier 2 to be attached to the second guide rail 715, the width of the first guide groove 716 can be larger, so that the carrier 2 can smoothly enter the first guide groove 716 from the second guide groove 802 more conveniently, and meanwhile, the ejector pad 718 can apply resistance to the carrier 2, so that the situation that the carrier 2 slides in the first guide groove 716 to cause inaccurate position and influence the positioning of the subsequent insert block 711 is prevented, and the reliable operation of the equipment is effectively ensured.

Further, with continued reference to fig. 18 and 19, the electrode assembly hot press apparatus further includes an outfeed stage 81 connected to platen 60, with outfeed stage 81 being obliquely positioned with one end tilted up adjacent to floating stage 53 and the other end tilted down. The discharging stage 81 and the feeding stage 800 are respectively located on two sides of the floating stage 53, and are provided with third guide grooves 810 butted with the first guide grooves 716, and the third guide grooves 810 are inclined downwards in a direction away from the first guide grooves 716.

When the third driving device 801 drives the carrier 2 in the second guiding groove 802 to move into the first guiding groove 716, the carrier 2 newly moving into the first guiding groove 716 pushes the carrier 2 originally located in the first guiding groove 716 to the third guiding groove 810 and slides down along the third guiding groove 810, and a belt line or a magazine may be disposed at an outlet of the third guiding groove 810 to transfer or collect the sliding carrier 2. Therefore, the feeding and discharging of the carrier 2 can be realized through the third driving device 801, the structure is simple and ingenious, and the cost is lower.

As shown in fig. 11, in order to adjust the relative positions of the first guide groove 716, the second guide groove 802 and the third guide groove 810, the lifting and pressing device further includes a fixing ring 58 connected to the first guide shaft 51, the fixing ring 58 is located above the floating stage 53 and used for limiting the maximum height position of the floating stage 53 under the jacking of the elastic support 54, and the position of the fixing ring 58 on the first guide shaft 51 is adjustable, so that the relative positions in the height direction (Z-axis direction) between the first guide groove 716 and the second guide groove 802 and the third guide groove 810 can be conveniently adjusted, and the carrier 2 can be ensured to smoothly enter into another guide groove along one guide groove.

In some embodiments, the electrode assembly hot pressing apparatus further includes a pressing amount adjusting assembly, the pressing amount adjusting assembly is configured to adjust a pressing amount of the first hot pressing head 40 and the second hot pressing head 41 on the electrode assembly 1, and the electrode assembly 1 can be prevented from being excessively pressed by controlling the pressing amount, so that an extension amount of the insulating adhesive layer 11 in the plane direction is better controlled, the inward or outward excessive extension of the insulating adhesive layer is prevented, and further improvement of product quality and yield is facilitated. The control of the pressing amount of the electrode assembly 1 can be controlled by controlling the distance between the first thermal pressing head 40 and the second thermal pressing head 41 when the electrode assembly 1 is pressed, and the smaller the distance between the two thermal pressing heads is, the smaller the pressing amount is, otherwise, the larger the pressing amount is.

Since the second thermal compression head 41 is fixed, the distance between the first thermal compression head 40 and the second thermal compression head 41 when the electrode assembly 1 is pressed, that is, the pressing amount of the electrode assembly 1 can be controlled by limiting the lowest position where the first thermal compression head 40 is lowered.

As shown in fig. 11, in a preferred embodiment, the pressing amount adjusting assembly includes a first limiting member 830 and a second limiting member 831, which are oppositely disposed, the first limiting member 830 is connected to the lifting plate 52 and extends toward the bedplate 60, the second limiting member 831 is connected to the bedplate 60 and extends toward the lifting plate 52, the first limiting member 830 and the second limiting member 831 are disposed opposite to each other, when the lifting plate 52 descends until the first limiting member 830 and the second limiting member 831 contact, they descend to the lowest position, and the corresponding first thermal compression head 40 is also at the lowest position, and at this time, the electrode assembly 1 is pressed by the two thermal compression heads, obviously, by controlling the descending amplitude of the lifting plate 52, the distance between the two thermal compression heads during pressing can be controlled, so as to control the pressing amount of the two thermal compression heads on the electrode assembly 1.

It is understood that in other embodiments, only the first limiting member 830 may be disposed on the lifting plate 52, and when the first limiting member 830 contacts the platen 60, the lifting plate 52 and the first thermal compression head 40 are located at the lowest position. It is also possible to provide only the second limiting member 831 on the platen 60, and when the second limiting member 831 is in contact with the elevating plate 52, the elevating plate 52 and the first thermal compression head 40 are located at the lowest position.

The first and second limiting

members

830 and 831 can be configured to have adjustable protruding distances, such as a threaded connection, so as to adjust the lowest positions of the lifting plate 52 and the first thermal compression head 40.

In a preferred embodiment, referring to fig. 10, the first driving device 55 includes a body 550 and a driving rod 551 capable of performing telescopic motion relative to the body 550, the frame 6 includes a mounting plate 61 located above the lifting plate 52, the body 550 is fixedly connected to the mounting plate 61, and the driving rod 551 extends to the lower side of the mounting plate 61 to be connected to the lifting plate 52, so as to drive the lifting plate 52 to perform lifting motion. The pressing amount adjusting assembly includes a second guide shaft 832 slidably coupled to the mounting plate 61, and a first connector 833 and a second connector 834 both connected to the second guide shaft 832, wherein the first connector 833 is located below the mounting plate 61 and connected between the second guide shaft 832 and the driving rod 551, so that the second guide shaft 832 can be simultaneously lifted and lowered along with the driving rod 551. The second connecting element 834 is disposed above the body 550, and is connected to a third limiting element 835 disposed above the body 550, when the driving rod 551 extends, the driving rod drives the second guiding shaft 832, the second connecting element 834 and the third limiting element 835 to descend, and when the third limiting element 835 contacts with the top of the body 550, the lifting plate 52 and the first thermal pressing head 41 are located at the lowest position.

The third position-limiting member 835 is preferably a bolt, and is threadedly coupled to the second connecting member 833, so that the distance between the third position-limiting member 835 and the body 550 can be adjusted to adjust the lowest positions of the lifting plate 52 and the first thermal compression head 40.

As shown in fig. 10, the number of the second guide shafts 832 is two, and the two second guide shafts 832 are respectively located at two sides of the body 550, and two ends of the first connecting piece 833 and the second connecting piece 834 are connected to the two second guide shafts 832, so that the connection between the second guide shafts 832 and the third limiting piece 835 is firmer, and the third limiting piece 835 is not easily deformed or loosened by force when being abutted to the body 550, and the limiting is more reliable.

It is understood that the controller is electrically connected to each of the first drive device 55, the second drive device 710 and the third drive device 801, and is capable of controlling each of the drive devices. The controller may include one or more of common industrial control devices such as a PLC, an industrial personal computer, a computer, and the like, and may control the third driving device 801, the second driving device 710, and the first driving device 55 to sequentially operate through a preset program to implement the operation processes of feeding, pressing, and discharging, or may be provided with a control button 90, and the button 90 controls the operation of each driving device to implement individual control of each step.

The electrode assembly hot-pressing apparatus described above may generally adopt the following operation processes:

s1, placing a carrier 2 carrying an electrode assembly 1 into a second guide groove 802 of a feeding carrier platform 800;

s2, driving a carrier 2 on a feeding carrying platform 800 to enter a first guide groove 716 through a third driving device 801;

s3, driving the insert 71 to be inserted into the positioning groove 22 of the carrier 2 through the second driving device 710;

and S4, the lifting plate 52 and the first hot pressing head 40 are driven to descend by the first driving device 55, in the descending process, the longitudinal positioning assembly 70 is firstly abutted to the carrier 2, the carrier 2 is fixed on the floating carrying platform 53, then the first hot pressing head 40 is abutted to the electrode assembly 1, then the fixing member 57 is abutted to the floating carrying platform 53, the floating carrying platform 53 is driven to descend, and the first hot pressing head 40 and the second hot pressing head 41 are pressed on two sides of the electrode assembly 1.

S5, after maintaining the pressing state for a predetermined time, the first driving device 55 drives the lifting plate 52 to ascend, so that the first hot pressing head 40 and the second hot pressing head 41 are separated from the electrode assembly 1.

The invention also provides a hot pressing method of the electrode assembly, which comprises the following steps:

fixing the outer edge of an electrode assembly 1 through a carrier 2, wherein the electrode assembly 1 comprises plate bodies 10, an insulating glue layer 11 and electrodes 12 which are stacked;

driving the first and second thermal pressing

heads

40 and 41 to press the electrode assembly 1 on the carrier 2 from both sides;

the first and second thermal pressing

heads

40 and 41 are driven to be separated from the electrode assembly 1 after the dwell time is preset.

Preferably, when pressing the electrode assembly 1 on the carrier 2, the distance between the two hot pressing heads is controlled to maintain the distance between the two hot pressing heads at a predetermined distance, thereby controlling the pressing amount of the electrode assembly 1.

The hot pressing method of the electrode assembly can be implemented by the electrode assembly hot pressing equipment, the connection strength and the product quality of the electrode assembly 1 can be effectively improved by hot pressing the electrode assembly 1 at two sides and controlling the pressure maintaining time, and meanwhile, the product consistency is better.

The above description is only a specific embodiment of the present invention, and any other modifications based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. An electrode assembly hot pressing apparatus, comprising:

the carrier (2) is used for carrying at least one electrode assembly (1), the electrode assembly (1) comprises a plate body (10), an insulating glue layer (11) and an electrode (12) which are arranged in a stacked mode, and the carrier (2) fixes the outer edge of the plate body (10);

the pressure head assembly comprises a first hot pressing head (40) and a second hot pressing head (41) which are respectively positioned on two sides of the carrier (2); and (c) a second step of,

and the lifting pressing device is used for driving the first hot pressing head (40) and/or the second hot pressing head (41) to move so that the first hot pressing head (40) and the second hot pressing head (41) press the electrode assembly (1) from two sides.

2. The electrode assembly hot press apparatus according to claim 1, further comprising a controller electrically connected to the elevation press-bonding device, the first hot press head (40), and the second hot press head (41), for controlling a time when the first hot press head (40) and the second hot press head (41) press-bond the electrode assembly (1) and a temperature of the first hot press head (40) and the second hot press head (41).

3. The electrode assembly hot-pressing apparatus according to claim 1, wherein the carrier (2) comprises a first carrier plate (20) and a second carrier plate (21), the first carrier plate (20) is provided with an annular boss (200) for supporting the outer edge of the plate body (10), the second carrier plate (21) is provided with a pressing ring (210) which is matched with the annular boss (200) to fix the outer edge of the plate body (10), the pressing ring (210) and the annular boss (200) are coaxially arranged, and the electrode (12) is coupled in the pressing ring (210).

4. The electrode assembly hot pressing apparatus according to claim 3, wherein the carrier (2) further includes a first through hole (201) coaxially disposed with the annular boss (200), the plate body (10) is fitted into the first through hole (201), and the pressing ring (210) extends into the first through hole (201) and abuts against an outer edge of the plate body (10).

5. The electrode assembly hot-pressing apparatus according to claim 3, wherein the first hot-pressing head (40) includes a first hot-pressing block (400) and a first heating device (401) for heating the first hot-pressing block (400), the first hot-pressing block (400) includes a first heating column (4000) protruding outward, and the first heating column (4000) is disposed corresponding to the pressing ring (210);

the second hot-pressing head (41) comprises a second hot-pressing block (410) and a second heating device (411) used for heating the second hot-pressing block (410), the second hot-pressing block (410) comprises a second heating column (4100) protruding outwards, and the second heating column (4100) is arranged corresponding to the annular boss (200).

When the electrode assembly (1) is pressed, the first heating column (4000) and the second heating column (4100) are matched to press the electrode assembly (1).

6. The electrode assembly hot pressing apparatus according to any one of claims 1 to 5, further comprising a frame (6), wherein the frame (6) comprises a platen (60), the lifting and pressing device comprises a first guide shaft (51) connected to the platen (60), a lifting plate (52) located above the platen (60) and slidably coupled to the first guide shaft (51), a floating stage (53) located between the platen (60) and the lifting plate (52) and slidably coupled to the first guide shaft (51), and an elastic support (54) connected between the floating stage (53) and the platen (5), wherein the carrier (2) is located on the floating stage (53), the first hot pressing head (40) is connected to the lifting plate (52), the second hot pressing head (41) is connected to the platen (60), and the lifting and pressing device further comprises a first driving device (55) connected to the frame (5) and configured to drive the lifting plate (52) to perform lifting and pressing motions.

7. The electrode assembly hot pressing apparatus according to claim 6, wherein the lifting and lowering press-fitting device further comprises a fixing ring (58) coupled to the first guide shaft (51), the fixing ring (58) being for limiting a highest position of the floating stage (53).

8. The electrode assembly hot-pressing device according to claim 6, wherein the lifting and pressing device further comprises a pressing component connected with the lifting plate (52), and during the descending process of the lifting plate (52), the first hot-pressing head (40) is firstly contacted with the electrode assembly (1), and then the pressing component is abutted against the floating carrying platform (53) and drives the floating carrying platform (53) to descend.

9. The electrode assembly hot pressing apparatus according to claim 8, wherein the pressing assembly includes a connecting column (56) connected to the lifting plate (52) and a fixing member (57) connected to the connecting column (56), the height of the fixing member (57) on the connecting column (56) is adjustable, and the pressing assembly abuts against the floating stage (53) through the fixing member (57) and drives the floating stage (53) to descend.

10. The electrode assembly hot pressing apparatus according to claim 8, further comprising a longitudinal positioning assembly (70) driven by the lifting plate (52) to be lifted, wherein during the lifting plate (52) is lowered, the longitudinal positioning assembly (70) contacts the carrier (2) first, presses the carrier (2) onto the floating carrier (53), and then the first hot pressing head (40) contacts the electrode assembly (1).

11. The electrode assembly hot pressing apparatus according to claim 10, wherein the longitudinal positioning assembly (70) includes a beam (700) connected to the connection post (56), a lift pin (701) slidably coupled to the beam (700), a fixing block (703) connected to the beam (700), and an elastic member (702) connected between the fixing block (703) and the lift pin (701), the elastic member (702) pressing the lift pin (701) toward the side of the carrier (2).

12. The electrode assembly hot pressing apparatus according to claim 6, further comprising a horizontal positioning assembly (71), wherein the horizontal positioning assembly (71) is used for positioning the carrier (2) on the floating stage (53) in a horizontal direction, and comprises a first guide rail (714) and a second guide rail (715) which are arranged on the floating stage (53) at intervals, a first guide groove (716) is formed between the first guide rail (714) and the second guide rail (715), and the carrier (2) is slidably coupled in the first guide groove (716).

13. The electrode assembly hot pressing apparatus according to claim 12, wherein the first guide rail (714) defines a notch (7140) communicating with the first guide groove (716), the carrier (2) is provided with a positioning groove (22) at a side thereof, the horizontal positioning assembly (71) includes a second driving device (710) and an insertion block (711) connected to the second driving device (710), the insertion block (711) is at least partially fitted into the positioning groove (22), and the second driving device (710) is configured to drive the insertion block (711) to be inserted into the positioning groove (22).

14. The electrode assembly hot pressing apparatus according to claim 12, further comprising a feeding assembly (80), wherein the feeding assembly (80) comprises a feeding stage (800) and a third driving device (801), the feeding stage (800) is provided with a second guide groove (802) abutting against the first guide groove (716), and the third driving device (801) is used for driving the carrier (2) in the second guide groove (802) to move into the first guide groove (716).

15. The electrode assembly hot pressing apparatus according to claim 14, further comprising an outfeed stage (81), wherein the outfeed stage (81) is provided with a third guide groove (810) abutting against the first guide groove (716), and wherein the third driving device (801) is configured to drive the carrier (2) in the first guide groove (716) to move into the third guide groove (810).

16. The electrode assembly hot press apparatus as claimed in claim 6, comprising a pressing amount adjusting assembly which controls a pressing amount of the electrode assembly (1) by controlling a distance between the first and second hot press heads (40, 41) when pressing the electrode assembly (1).

17. The electrode assembly hot pressing apparatus as claimed in claim 16, wherein the pressing amount adjusting assembly controls a distance between the first and second hot pressing heads (40, 41) when pressing the electrode assembly (1) by controlling a lowest position where the first hot pressing head (40) descends;

the pressing amount adjusting assembly comprises a first limiting piece (830) connected to the lifting plate (52), and when the first limiting piece (830) descends to abut against the bedplate (60), the first hot pressing head (41) is located at the lowest position; or,

the pressing amount adjusting assembly comprises a second limiting piece (831) connected to the bedplate (60), and when the lifting plate (52) descends to abut against the second limiting piece (831), the first hot pressing head (41) is located at the lowest position; or,

the pressing amount adjusting assembly comprises a first limiting piece (830) connected to the lifting plate (52) and a second limiting piece (831) connected to the bedplate (60), and when the first limiting piece (830) descends to abut against the second limiting piece (831), the first hot pressing head (41) is located at the lowest position.

18. The electrode assembly hot pressing apparatus as claimed in claim 6, wherein the frame (6) includes a mounting plate (61) above the elevating plate (52), the first driving means (55) includes a body (550) connected to the mounting plate (61) and a driving rod (551) for telescopic movement with respect to the body (550), the driving rod (551) being connected to the elevating plate (52);

the pressfitting volume adjusting part is through controlling the lowest position control that first hot pressing head (40) descends is in the pressfitting during electrode subassembly (1) distance between first hot pressing head (40) and second hot pressing head (41), its include with mounting panel (61) slip match second guiding axle (832), second guiding axle (832) one end through first connecting piece (833) with actuating lever (551) link to each other, and the other end is connected with second connecting piece (834), pressfitting volume adjusting part still including being located body (550) top third locating part (835), when third locating part (835) with when body (550) contacts, first hot pressing head (41) are located the lowest position.

19. A method of hot pressing an electrode assembly, comprising the steps of:

fixing the outer edge of an electrode assembly (1) through a carrier (2), wherein the electrode assembly (1) comprises plate bodies (10), an insulating glue layer (11) and electrodes (12) which are stacked;

driving a first hot pressing head (40) and a second hot pressing head (41) to press the electrode assembly (1) on the carrier (2) from two sides;

and driving the first hot-pressing head (40) and the second hot-pressing head (41) to be separated from the electrode assembly (1) after the pressure maintaining for a preset time.