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

Abstract

The application discloses an electrode assembly hot-pressing device and an electrode assembly hot-pressing method. The electrode assembly hot-pressing device comprises a carrier, a pressure head assembly and a lifting and pressing device. The carrier is used for carrying at least one electrode assembly, the electrode assembly comprises a plate body, an insulating adhesive layer and an electrode which are stacked, and the carrier fixes the outer edge of the plate body. The pressure head assembly comprises a first hot pressure head and a second hot pressure head which are respectively located on the two sides of the carrier. The lifting and pressing device is used for driving the first hot pressure head and / or the second hot pressure head to move, so that the first hot pressure head and the second hot pressure head press the electrode assembly from both sides. In the application, the first hot pressure head and the second hot pressure head press the electrode assembly on the carrier from both sides, and the electrode assembly and the insulating adhesive layer in the electrode assembly are heated from both sides, which is beneficial to rapidly heat the insulating adhesive layer to connect the plate body and the electrode, thereby improving the connection quality and the connection strength of each part of the electrode assembly.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and in particular to an electrode assembly hot pressing device and a method for hot pressing electrode assemblies. Background Technology

[0002] like Figure 1 and Figure 2 As shown, Figure 1 and Figure 2 An electrode assembly 1 for a button cell is shown, comprising a plate 10, an electrode 12, and an insulating adhesive layer 11 connecting the electrode 12 and the plate 10. The plate 10 has a central hole 13, and the electrode 10 has an electrode post 15 passing through the first central hole 13. The insulating adhesive layer 11 is a hot melt adhesive, which connects the plate 10 and the electrode 12 by hot pressing.

[0003] In the prior art, a simple hot pressing device is usually used to press the electrode assembly. During hot pressing, the hot pressing head is manually controlled or driven by a power device such as a cylinder or hydraulic cylinder to squeeze the electrode assembly 1 from above and downward, applying pressure to the electrode assembly 1. The pressure on the electrode assembly 1 fluctuates greatly, and the hot pressing time is usually controlled according to the experience of the operator, resulting in inconsistent quality of the electrode assembly.

[0004] The hot pressing method described above has many defects. For example, the connection between the plate 10 and the electrode 12 is not strong, and the connection force of different electrode components 1 fluctuates greatly. Furthermore, the outer edge of the insulating adhesive layer 11 tends to extend excessively beyond the outer edge of the electrode 12, causing the insulating adhesive layer 11 to burn during subsequent welding of the plate 10. Also, the inner edge of some insulating adhesive layers 11 even extends from the first central hole 13 to the outer surface of the plate 10, which has an adverse effect on the appearance and performance.

[0005] Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects. Summary of the Invention

[0006] The purpose of this invention is to provide an electrode assembly hot pressing device and an electrode assembly hot pressing method, which results in a higher connection strength between the components of the electrode assembly.

[0007] To achieve the above-mentioned objectives, in one aspect, the present invention proposes an electrode assembly hot pressing device, characterized in that it comprises:

[0008] A carrier for carrying at least one electrode assembly, the electrode assembly comprising stacked plates, an insulating layer and electrodes, the carrier fixing the outer edge of the plates;

[0009] The pressure head assembly includes a first hot pressure head and a second hot pressure head located on both sides of the carrier, respectively; and,

[0010] A lifting and pressing device is used to drive 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 both sides.

[0011] Furthermore, the electrode assembly hot pressing device also includes a controller electrically connected to the lifting and pressing device, the first hot pressing head and the second hot pressing head. The controller is used to control the time when the first hot pressing head and the second hot pressing head press the electrode assembly and the temperature of the first hot pressing head and the second hot pressing head.

[0012] Furthermore, the carrier includes a first carrier plate and a second carrier plate. The first carrier plate is provided with an annular boss for supporting the outer edge of the plate body. The second carrier plate is provided with a pressure ring that cooperates with the annular boss to fix the outer edge of the plate body. The pressure ring and the annular boss are arranged coaxially, and the electrode is connected to the pressure ring.

[0013] Furthermore, the carrier also includes a first through hole coaxially arranged with the annular boss, the plate body is fitted into the first through hole, and the pressure ring extends into the first through hole and abuts against the outer edge of the plate body.

[0014] Furthermore, the first hot press head includes a first hot press block and a first heating device for heating the first hot press block. The first hot press block includes an outwardly protruding first heating column, which is correspondingly disposed with the pressure ring.

[0015] The second hot press head includes a second hot press block and a second heating device for heating the second hot press block. The second hot press block includes an outwardly protruding second heating column, which is correspondingly arranged with the annular boss.

[0016] When pressing the electrode assembly, the first heating column and the second heating column cooperate to press the electrode assembly.

[0017] Furthermore, the electrode assembly hot pressing equipment also includes a frame, the frame including a platform, the lifting and pressing device including a first guide shaft connected to the platform, a lifting plate located above the platform and slidably engaged with the first guide shaft, a floating platform located between the platform and the lifting plate and slidably engaged with the first guide shaft, and an elastic support member connected between the floating platform and the platform. The carrier is located on the floating platform, the first hot pressing head is connected to the lifting plate, the second hot pressing head is connected to the platform, and the lifting and pressing device also includes a first driving device connected to the frame and used to drive the lifting plate to perform lifting and lowering movements.

[0018] Furthermore, the lifting and pressing device also includes a fixing ring connected to the first guide shaft, the fixing ring being used to limit the highest position of the floating platform.

[0019] Furthermore, the lifting and pressing device also includes a pressing component connected to the lifting plate. During the descent of the lifting plate, the first hot pressing head first contacts the electrode component, and then the pressing component abuts against the floating platform and drives the floating platform to descend.

[0020] Furthermore, the pressing component includes a connecting column connected to the lifting plate and a fixing member connected to the connecting column. The height of the fixing member on the connecting column is adjustable. The pressing component abuts against the floating platform through the fixing member and drives the floating platform to descend.

[0021] Furthermore, the electrode assembly hot pressing device also includes a longitudinal positioning component that is driven to rise and fall by the lifting plate. During the descent of the lifting plate, the longitudinal positioning component first contacts the carrier and presses the carrier onto the floating platform, and then the first hot pressing head contacts the electrode assembly.

[0022] Furthermore, the longitudinal positioning assembly includes a crossbeam connected to the connecting column, a top rod slidably engaged with the crossbeam, a fixing block connected to the crossbeam, and an elastic element connected between the fixing block and the top rod, wherein the elastic element presses the top rod toward the side where the vehicle is located.

[0023] Furthermore, the electrode assembly hot pressing device also includes a horizontal positioning component, which is used to position the carrier in the horizontal direction on the floating platform. The horizontal positioning component includes a first guide rail and a second guide rail spaced apart on the floating platform. A first guide groove is formed between the first guide rail and the second guide rail, and the carrier is slidably engaged in the first guide groove.

[0024] Furthermore, the first guide rail has a notch communicating with the first guide groove, the side of the carrier is provided with a positioning groove, the horizontal positioning component includes a second driving device and an insert block connected to the second driving device, the insert block is at least partially adapted to the positioning groove, and the second driving device is used to drive the insert block to be inserted into the positioning groove.

[0025] Furthermore, the electrode assembly hot pressing equipment also includes a feeding assembly, which includes a feeding platform and a third driving device. The feeding platform is provided with a second guide groove that mates with the first guide groove, and the third driving device is used to drive the carrier in the second guide groove to move into the first guide groove.

[0026] Furthermore, the electrode assembly hot pressing equipment also includes a discharge platform, which is provided with a third guide groove that docks with the first guide groove. The third driving device is used to drive the carrier in the first guide groove to move into the third guide groove.

[0027] Furthermore, the electrode assembly hot pressing device includes a pressing amount adjustment component, which 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 pressing the electrode assembly.

[0028] Furthermore, the pressing amount adjustment component controls the distance between the first hot pressing head and the second hot pressing head when pressing the electrode assembly by controlling the lowest position of the first hot pressing head descent;

[0029] The pressing amount adjustment assembly includes a first limiting member connected to the lifting plate. When the first limiting member descends to abut against the platform, the first hot press head is at its lowest position; or...

[0030] The pressing amount adjustment assembly includes a second limiting member connected to the platform. When the lifting plate descends to abut against the second limiting member, the first hot press head is at its lowest position; or...

[0031] The pressing amount adjustment component includes a first limiting member connected to the lifting plate and a second limiting member connected to the platform. When the first limiting member descends to abut against the second limiting member, the first hot press head is at its lowest position.

[0032] Furthermore, the frame includes a mounting plate located above the lifting plate, and the first driving device includes a body connected to the mounting plate and a driving rod that performs telescopic movements relative to the body, the driving rod being connected to the lifting plate;

[0033] The pressing amount adjustment component controls the distance between the first and second hot pressing heads when pressing the electrode assembly by controlling the lowest position of the first hot pressing head. It includes a second guide shaft that is slidably engaged with the mounting plate. One end of the second guide shaft is connected to the drive rod through a first connector, and the other end is connected to a second connector. The pressing amount adjustment component also includes a third limiting member located above the body. When the third limiting member contacts the body, the first hot pressing head is at its lowest position.

[0034] On the other hand, the present invention also proposes a hot pressing method for an electrode assembly, comprising the following steps:

[0035] The outer edge of the electrode assembly is fixed by a carrier. The electrode assembly includes stacked plates, an insulating layer and electrodes.

[0036] The first and second hot press heads are driven to press the electrode assembly located on the carrier from both sides;

[0037] After a preset pressure holding time, the first and second hot press heads are driven to separate from the electrode assembly.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. In this invention, the first hot press head and the second hot press head press the electrode assembly located on the carrier from both sides. The electrode assembly and the insulating adhesive layer therein are heated from both sides, which helps to quickly heat the insulating adhesive layer to connect the plate and the electrode, thereby improving the connection quality and enhancing the connection strength of each component of the electrode assembly.

[0040] 2. As an improvement, by setting a controller to control the time and temperature of pressing the electrode assembly, it is beneficial to further improve the quality of the electrode assembly, make the bonding between the insulating adhesive layer and the plate and the electrode stronger, and at the same time eliminate the interference of human subjective factors, improve the production efficiency of the electrode assembly, and ensure the consistency of the performance of the manufactured electrode assembly.

[0041] 3. As an improvement, positioning the electrode assembly using a carrier can effectively improve the positional accuracy between the components of the electrode assembly, thereby improving the dimensional accuracy and quality of the manufactured electrode assembly. At the same time, the second carrier plate of the carrier is provided with a pressure ring, and the insulating adhesive layer and the electrode are located inside the pressure ring. The pressure ring can limit the distance of the insulating adhesive layer extending outward after pressing, thereby effectively ensuring that the insulating adhesive layer does not extend excessively outward, which is beneficial to the subsequent welding operation of the plate.

[0042] 4. As an improvement, by setting a pressing amount adjustment component to control the pressing amount of the electrode assembly, it is beneficial to prevent excessive compression of the insulating adhesive layer, which would lead to excessive extension of the outer and inner edges of the insulating adhesive layer, thereby effectively improving the quality, yield, and performance consistency of the manufactured electrode assembly.

[0043] 5. As an improvement, by setting longitudinal positioning components and horizontal positioning components to limit the position of the carrier in the longitudinal and horizontal directions, the positional accuracy of the carrier on the floating platform is higher, which is conducive to the reliable operation of the equipment and improves the quality of the manufactured electrode assembly. Attached Figure Description

[0044] Figure 1 This is an exploded view of an electrode assembly according to an embodiment of the present invention.

[0045] Figure 2 yes Figure 1 The cross-sectional view of the electrode assembly shown.

[0046] Figure 3This is a schematic diagram showing the positions of the pressure head assembly and the carrier in one embodiment of the present invention.

[0047] Figure 4 yes Figure 3 The three-dimensional sectional view of the structure shown.

[0048] Figure 5 This is a schematic diagram of the structure of a carrier according to an embodiment of the present invention, wherein the carrier carries an electrode assembly.

[0049] Figure 6 yes Figure 5 The exploded view of the vehicle shown.

[0050] Figure 7 yes Figure 5 The vehicle shown is a cross-sectional view.

[0051] Figure 8 yes Figure 7 Enlarged view of section I.

[0052] Figure 9 This is a schematic diagram of the structure of the first hot press head in one embodiment of the present invention.

[0053] Figure 10 This is a schematic diagram of the structure of an electrode assembly hot pressing device according to an embodiment of the present invention.

[0054] Figure 11 This is a schematic diagram of the lifting plate, floating platform, and platform portion of the electrode assembly hot pressing equipment according to an embodiment of the present invention.

[0055] Figure 12 This is a schematic diagram showing the positions of the pressure head assembly, floating platform, and carrier in one embodiment of the present invention.

[0056] Figure 13 This is a schematic diagram of the structure of the floating platform, the pressing component, the horizontal positioning component, and the vertical positioning component according to one embodiment of the present invention.

[0057] Figure 14 This is a schematic diagram of the structure of a longitudinal positioning component according to an embodiment of the present invention.

[0058] Figure 15 This is a schematic diagram of the structure in which a horizontal positioning component and a floating platform are connected according to an embodiment of the present invention.

[0059] Figure 16 This is a cross-sectional schematic diagram showing the connection between a horizontal positioning component and a floating platform according to an embodiment of the present invention.

[0060] Figure 17 yes Figure 16 Enlarged view of section II.

[0061] Figure 18 yes Figure 11 The diagram shown is a three-dimensional representation of the structure with a feeding assembly and a discharge platform.

[0062] Figure 19 This is a top view of the feeding assembly, horizontal positioning assembly, and discharging assembly according to one embodiment of the present invention. Detailed Implementation

[0063] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0064] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0065] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0066] The electrode assembly hot pressing device corresponding to a preferred embodiment of the present invention includes a carrier 2, a pressure head assembly, and a lifting and pressing device.

[0067] The carrier 2 is used to carry at least one electrode assembly 1, which is supported and limited by the carrier 2, thereby enabling it to be pressed with higher precision. Figure 1 and Figure 2As shown, the electrode assembly 1 includes a plate 10, an electrode 12, and an insulating adhesive layer 11 sandwiched between the plate 10 and the electrode 12. The plate 10, the insulating adhesive layer 11, and the electrode 12 are all generally sheet-like. It is understood that when the electrode assembly 1 is not pressed together, the plate 10, the electrode 12, and the insulating adhesive layer 11 are separate and not connected. In a preferred embodiment, the plate 10 is made of an alloy, such as stainless steel, the electrode 12 is made of aluminum alloy, and the insulating adhesive layer 11 is made of hot melt adhesive.

[0068] The plate 10 and the insulating layer 11 are respectively provided with a first central hole 13 and a second central hole 14. The electrode 12 is provided with an electrode post 15 passing through the two central holes. The plate 10, the electrode 12 and the insulating layer 11 are arranged coaxially. The plate 10 has the largest size, and its outer edge extends beyond the insulating layer 11 and the electrode 12. The carrier 2 is used to fix the outer edge of the plate 10. It has clearance spaces located above and below the electrode assembly 1 to expose the electrode 12 and the part of the plate 10 corresponding to the electrode 12 for the pressure head assembly to contact and heat press.

[0069] In this embodiment, the outer contours of the plate 10, the insulating adhesive layer 11, and the electrode 12 are all circular. It is understood that in other embodiments, the plate 10, the insulating adhesive layer 11, and the electrode 12 may also be in other shapes, such as rectangular. In this case, the shape of the part of the carrier 2 used to install the electrode assembly 1 can be adapted accordingly.

[0070] like Figure 3 and Figure 4 As shown, the pressure head assembly includes a first hot pressure head 40 and a second hot pressure head 41 located on both sides of the carrier 2. The first hot pressure head 40 and the second hot pressure head 41 are capable of generating heat to heat the insulating adhesive layer 11 so that it adheres to the plate 10 and the electrode 12.

[0071] The lifting and pressing device is used to drive the first hot pressing head 40 and / or the second hot pressing head 41 to move closer to each other, so as to press the electrode assembly 1 on the carrier 2 from both sides. For example, the lifting and pressing device can drive the first hot pressing head 40 towards the second hot pressing head 41. After the first hot pressing head 40 contacts the electrode assembly 1 (via the first hot pressing head 40 or other components), it drives the carrier 2 towards the second hot pressing head 41, so that the first hot pressing head 40 and the second hot pressing head 41 cooperate to clamp the electrode assembly 1 from both sides. Alternatively, the carrier 2 can be fixed, and the lifting and pressing device can drive the two hot pressing heads to move from both sides towards the carrier 2 until the two hot pressing heads cooperate to clamp the electrode assembly 1 from both sides.

[0072] Since the first hot pressing head 40 and the second hot pressing head 41 clamp the electrode assembly 1 from both sides during the hot pressing of the electrode assembly 1, both sides of the electrode assembly 1 can be heated simultaneously, resulting in high thermal conductivity. In this way, both sides of the insulating adhesive layer 11 can be heated quickly and evenly, which is beneficial for it to bond more firmly to the plate 10 and the electrode 12 after being heated and melted, and the connection strength of the electrode assembly 1 is higher.

[0073] In some embodiments, such as Figure 5 and Figure 6 As shown, the carrier 2 includes a first carrier plate 20 and a second carrier plate 21. The first carrier plate 20 is provided with a positioning post 203, and the second carrier plate 21 is provided with a positioning hole 211 corresponding to the positioning post 203. When the positioning post 203 and the positioning hole 211 of the second carrier plate 21 are engaged, the two achieve positioning.

[0074] refer to Figure 7 and Figure 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 on both sides of the annular boss 200. The annular boss 200, the first through hole 201 and the second through hole 202 are arranged coaxially, and the 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 pressure ring 210 extending into the first through hole 201, and the second inner hole 2100 of the pressure ring 210 communicates with the upper and lower sides of the second carrier plate 21.

[0075] When positioning the electrode assembly 1 on the carrier 2, the plate 1 is first placed in the first through hole 201, supported by the annular boss 201. The plate 1 and the first through hole 201 are compatible and can be positioned through the first through hole 201. After the plate 1 is placed, the second carrier plate 21 is stacked on the first carrier plate 20, so that the pressure ring 210 extends into the first through hole 201 and abuts against the outer edge of the pressure ring 210. In this way, the pressure ring 210 is fixed between the first carrier plate 20 and the second carrier plate 21. The pressure ring 210 is compatible with the first through hole 201, and the two are arranged coaxially. Then, the insulating adhesive layer 11 and the electrode 12 are sequentially placed into the pressure ring 210, so that the plate 10, the insulating adhesive layer 11 and the electrode 12 are stacked from bottom to top. Electrode 12 is adapted to the second inner hole 2100 of pressure ring 210 and can be positioned through the second inner hole 2100. The diameter of insulating adhesive layer 11 is usually slightly smaller than the diameter of electrode 12, so it can also be positioned with high precision through the second inner hole 2100. In this way, when plate 10, insulating adhesive layer 11 and electrode 12 are all mounted on carrier 2, the three can be positioned by carrier 2 to maintain high-precision coaxial positioning. After subsequent pressing, electrode assembly 1 with higher precision and better quality can be obtained.

[0076] Understandably, the second inner hole 2100 of the pressure ring 210 can limit the maximum outer peripheral position of the insulating adhesive layer 11. When the insulating adhesive layer 11 is heated and extended outward, the pressure ring 210 can limit the maximum outward extension of the insulating adhesive layer 11, thereby preventing the insulating adhesive layer 11 from extending excessively outward.

[0077] In some embodiments, such as Figure 9 As shown, the first hot pressing head 40 includes a first hot pressing block 400 and a first heating device 401. The first hot pressing block 400 is provided with an outwardly protruding first heating column 4000, which is correspondingly arranged with the pressure ring 210. It can be understood that the carrier 2 can carry multiple electrode assemblies 1. In the structure shown in the figure, the carrier 2 is provided with six electrode assemblies 1. The number of first heating columns 4000 is the same as the number of electrode assemblies 1, and their positions correspond. In this way, multiple first heating columns 4000 can extend into the pressure ring 210 and simultaneously abut against multiple electrode assemblies 1.

[0078] The first hot pressing block 400 and the first heating column 4000 thereon are both made of materials with high thermal conductivity, such as stainless steel, aluminum alloy, and copper. The first heating device 401 is used to heat the first hot pressing block 400, including but not limited to electric heating, steam heating, or liquid heating, so that the first heating column 4000 has a suitable temperature, resulting in a stronger connection of the electrode assembly 1 when pressing it together. Preferably, the first heating device 401 is an electric heating device, such as a resistance wire or a heating rod. In this embodiment, the first heating device 401 is a heating rod, which is inserted into the first hot pressing block 400.

[0079] The second hot press head 41 has a similar structure to the first hot press head 40. (Refer to...) Figure 3 and Figure 4 It includes a second hot pressing block 410 and a second heating device 411 for heating the second hot pressing block 410. The second hot pressing block 410 is provided with an outwardly protruding second heating column 4100. The second heating column 4100 is correspondingly arranged with the second through hole 202 and the annular boss 200, so that the second heating column 4100 can pass through the second through hole 202 and the first inner hole 2000 of the annular boss 200 and abut against the electrode assembly 1. The number and position of the second heating columns 4100 are the same as the number and position of the electrode assemblies 1 on the carrier 2, so as to cooperate with the first heating column 4000 to press multiple electrode assemblies 1 simultaneously.

[0080] When the lifting and pressing device drives the first hot pressing head 40 and the second hot pressing head 41 to approach each other, the first heating column 4000 extends into the pressure ring 210, and the second heating column 4100 extends through the second through hole 202 into the annular boss 200, thereby pressing the electrode assembly 1 from both sides. It is understood that the second through hole 202 avoids the second heating column 4100, reducing the length of the first inner hole 2000, which requires higher machining accuracy and surface quality, thus helping to reduce costs. In other embodiments, the second through hole 202 can also be omitted, and the first inner hole 2000 extends directly to the outer surface of the first carrier plate 20.

[0081] The lifting and pressing device includes a first drive unit 55 (see reference numerals). Figure 10 The first drive device 55 can be a pneumatic, hydraulic, or electric drive device, such as a cylinder, hydraulic cylinder, electric cylinder, etc., or a drive device composed of an electric motor combined with a transmission mechanism (such as one or more of gears, racks, worm gears, linkage mechanisms, etc.). The first drive device 55 is used to provide power to drive the first hot press head 40 and the second hot press head 41 to press the electrode assembly 1 on the carrier 2 from both sides.

[0082] Furthermore, the electrode assembly hot pressing device also includes a controller for controlling the operation of the electrode assembly hot pressing device. The controller is electrically connected to the lifting and pressing device (specifically its first driving device 55) and can control the operation of the first driving device 55, for example, it can control the pressing time (holding time) of the first hot pressing head 40 and the second hot pressing head 41 on the electrode assembly 1. At the same time, it is also electrically connected to the first hot pressing head 40 and the second hot pressing head 41. Specifically, it is electrically connected to the first heating device 401 and the second heating device 411 and can control the heating of the heating device. Preferably, the controller can control the temperature of the heating device. For example, temperature sensors can be set to detect the first heating column 4000 and the second heating column 4100. When the detected temperature exceeds a preset value, the current is reduced or the power is stopped to reduce the heat generation. When the temperature is lower than the preset value, the power is turned on or the current is increased to increase the heat generation.

[0083] The controller not only simplifies operation and improves the automation level of the equipment, but also controls parameters such as the holding time and hot pressing temperature after pressing the electrode assembly 1. Combined with the high-precision positioning of the electrode assembly 1 on the carrier 2, the quality of the electrode assembly 1 can be effectively improved, and the quality and performance of the produced electrode assembly 1 are more consistent.

[0084] like Figure 10 As shown, Figure 10An electrode assembly hot pressing device according to a preferred embodiment is shown, wherein a first hot pressing head 40 and a second hot pressing head 41 are located on the upper and lower sides of a carrier 2, respectively. After the first hot pressing head 40 moves a certain distance toward the second hot pressing head 41, the carrier 2 is driven to move toward the second hot pressing head 41 at the same time, so that the two hot pressing heads press the electrode assembly 1 on the carrier 2.

[0085] For details, please refer to Figures 10 to 12 The frame 6 of the electrode assembly hot pressing equipment includes a platform 60, and a second hot pressing head 41 is connected to the platform 60. The lifting and pressing device includes a first guide shaft 51 fixedly connected to the platform 60, a lifting plate 52 located above the platform 60 and slidably engaged with the first guide shaft 51, a floating platform 53 located between the platform 60 and the lifting plate 52 and slidably engaged with the first guide shaft 51, and an elastic support member 54 connected between the floating platform 53 and the platform 60.

[0086] Four first guide shafts 51 are fixedly connected to the platform 60. The lifting plate 52 is connected to the first guide shafts 51 via linear bearings. The lifting plate 52 is connected to the first drive device 55, which drives it to move up and down along the first guide shafts 51. The first hot press head 40 is connected to the lifting plate 52 and located below it, moving synchronously with it. Both the first and second hot press heads 40 and 41 can be connected to heat insulation blocks 42. The first hot press head 40 is connected to the lifting plate 52 via the heat insulation block 42, and the second hot press head 41 is connected to the platform 60 via its heat insulation block 42. The heat insulation block 42 is made of materials with poor thermal conductivity, such as bakelite. This heat insulation block 42 separates the hot press heads, preventing direct contact with other materials with good thermal conductivity, thus reducing the impact of the hot press head's heat on other components and reducing heat loss. This helps maintain the temperature of the hot press head and is more energy-efficient.

[0087] The floating platform 53 can also be connected to the first guide shaft 51 by a linear bearing, allowing it to slide along the first guide shaft 51. The floating platform 53 has a clearance cavity 520 to allow the second hot press head 41 to contact the electrode assembly 1 inside the carrier 2. An elastic support 54 is positioned below the floating platform 53, providing the elastic force to drive the floating platform 53 to rise and reset. In a preferred embodiment, the elastic support 54 is a spring, sleeved on the first guide shaft 51, with its two ends abutting against the platform 60 and the floating platform 53, respectively. The carrier 2 is located on the floating platform 53 and can rise and fall with the movement of the floating platform 53.

[0088] The lifting and pressing device also includes a pressing component for pressing down the floating platform 53. The pressing component is connected to the lifting plate 52 and can move with the lifting plate 52. During the descent of the lifting plate 52, the first hot pressing head 40 first contacts the electrode assembly 1, and then the pressing component contacts the floating platform 53, causing the floating platform 53 to press down. For example, when the first hot pressing head 40 presses down the electrode assembly 1 by 0.1 mm, the pressing component contacts the floating platform 53. Then the pressing component, the floating platform 53, the carrier 2 and the first hot pressing head 40 move down synchronously.

[0089] As a preferred implementation method, such as Figure 11 As shown, the pressing assembly includes four connecting columns 56 connected to the lifting plate 52 and four fixing members 57 connected to the connecting columns 56. The connecting columns 56 are inserted within the floating platform 53. The fixing members 57 are located above the floating platform 53. During the descent of the lifting plate 52, the distance between the fixing members 57 and the floating platform 53 gradually decreases until they finally come into contact with the floating platform 53, causing it to descend. Preferably, the height of the fixing members 57 on the connecting columns 56 is adjustable. This allows adjustment of the pressing distance between the first hot pressing head 40 and the electrode assembly 1, thereby adjusting the amount of pressure applied by the two hot pressing heads to the electrode assembly 1.

[0090] To improve the positioning accuracy of the carrier 2 on the floating platform 53, the electrode assembly hot pressing device is equipped with a horizontal positioning component 71 for positioning the carrier 2 in the horizontal direction and a longitudinal positioning component 70 for positioning the carrier 2 in the vertical direction. The horizontal positioning component 71 can be used for positioning, for example, by using a positioning pin, and the carrier 2 can be manually placed on the positioning pin for positioning. The longitudinal positioning component 70 is used to press the carrier 2, so that the carrier 2 is in close contact with the floating platform 53, thereby reducing the positional error caused by the carrier 2 tilting in the vertical direction or by shaking during descent, and effectively ensuring the positioning accuracy of the carrier 2.

[0091] In one preferred embodiment, the longitudinal positioning component 70 is connected to the connecting column 56, or to the lifting plate 52, or to both the connecting column 56 and the lifting plate 52, such as... Figure 13 As shown, in this embodiment, the longitudinal positioning component 70 is connected to the connecting column 56 and is driven to rise and fall by the lifting plate 52. During the descent of the lifting plate 52, the longitudinal positioning component 70 first contacts the carrier 2 and presses the carrier 2 onto the floating platform 53. Then, the first hot press head 40 contacts the electrode component 1. In this way, the longitudinal positioning of the platform 2 can be achieved by the descent action of the lifting plate 52, without the need for manual longitudinal positioning of the platform 2, which is conducive to automation.

[0092] like Figure 13 and Figure 14As shown, the longitudinal positioning assembly 70 includes a crossbeam 700 connected to the connecting posts 56, a top rod 701 slidably engaged with the crossbeam 700, a fixing block 703 connected to the crossbeam 700, and an elastic element 702 connected to the top rod 701. Preferably, the crossbeam 700 connects to two connecting posts 56 simultaneously, thus shortening the cantilever length of the crossbeam 700 and improving its load-bearing capacity. The fixing block 703 is provided with a protrusion 7030 extending above the top rod 701, and the two ends of the elastic element 702 abut against the protrusion 7030 and the top rod 701 respectively, applying a downward elastic force to the top rod 701. Figure 14 As shown, the push rod 701 has a limiting block 7010 that protrudes laterally outward above the crossbeam 700, preventing the push rod 701 from falling off the crossbeam 700. Initially, the push rod 701 is located directly above the carrier 2. As the lifting plate 52 and connecting column 56 descend, the push rod 701 descends to abut against the carrier 2 and is pressed against the carrier 2 by the elastic force of the elastic element 702. Due to the elastic element 702, the pressure of the push rod 701 on the carrier 2 will not be excessive, making its use more reliable. The elastic element 702 is preferably a spring. By replacing the spring with one of different elastic coefficients, the pressing force of the push rod 701 on the carrier 2 can be changed.

[0093] Understandably, in addition to pressing the carrier 2 onto the floating platform 53, the longitudinal positioning component 70 can also press the second carrier plate 21 onto the first carrier plate 20, making the pressure ring 210 and the outer edge of the plate 10 more tightly pressed together. In this way, when the electrode assembly 1 is pressed by the pressure head assembly, the insulating adhesive layer 11 can be reliably blocked by the pressure ring 210 and will not overflow between the pressure ring 210 and the outer edge of the plate 10, which is beneficial to further ensure the quality of the manufactured electrode assembly 1.

[0094] In some embodiments, such as Figures 15 to 17 As shown, the horizontal positioning component 71 includes a first guide rail 714 and a second guide rail 715 disposed on the floating platform 53. The first guide rail 714 and the second guide rail 715 are arranged parallel and spaced apart, forming a first guide groove 716 between them. The first guide groove 716 is clearance-fitted with the carrier 2, and the carrier 2 is slidably fitted within the first guide groove 716, allowing it to slide along the first guide groove 716. Through the cooperation of the first guide rail 714 and the second guide rail 715 with the carrier 2, the position of the carrier 2 in the Y direction (the horizontal direction perpendicular to the guide rails) can be initially defined.

[0095] Furthermore, the first guide rail 714 has a notch 7140 communicating with the first guide groove 716, and the side of the carrier 2 is provided with a positioning groove 22. Specifically, the positioning groove 22 is provided on the side of the first carrier plate 20. The horizontal positioning assembly 71 also includes a second drive device 710 connected to the floating platform 53 and an insert 711 driven by the second drive device 710 to move linearly. The second drive device 710 is used to drive the insert 711 to move along a direction perpendicular to the first guide groove 716 (i.e., the Y direction), thereby driving the insert 711 to be inserted into the first guide groove 716 through the notch 7140. When the insert 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 defined, and the carrier 2 is pushed on the second guide rail 715. In this way, the carrier 2 is positioned with high precision in the horizontal direction.

[0096] To facilitate the insertion of the insert 711 into the positioning groove 22, the open end of the positioning groove 22 is provided with a guide slope 220. The two opposing guide slopes 220 form a flared shape. This ensures that even if the insert 711 is misaligned with the positioning groove 22 in the X direction, the insert 711 can still be inserted into the positioning groove 22 to position the vehicle 2. It can be understood that the insert 711 is at least partially adapted to the positioning groove 22 to achieve the positioning of the vehicle 2. Figure 17 In the illustrated embodiment, the end shape of the insert 711 is completely consistent with the shape of the positioning groove 22. To improve the movement accuracy of the insert 711, the horizontal positioning assembly 71 also includes a guide block 712 connected to the floating platform 53. A second guide hole 713 adapted to the insert 711 is formed between the guide block 712 and the floating platform 53. The second guide hole 713 is aligned with the notch 7140, so that the insert 711 can be accurately inserted into the carrier 2 through the notch 7140.

[0097] By engaging and positioning the insert 711 with the positioning groove 22, and by fitting and positioning the carrier 2 with the second guide rail 715, the carrier 2 achieves higher positional accuracy on the floating platform 53, and the carrier 2 is well fixed and not easily loosened or displaced. Thus, during hot pressing, the two hot pressing heads can accurately press the electrode assembly 1 on the carrier 2, resulting in better hot pressing quality.

[0098] It is understood that the type of the second drive device 710 is not limited, as long as it can drive the insert block 711 to perform linear reciprocating motion. Preferably, the second drive device 710 is a cylinder, an electric cylinder, or an electric push rod.

[0099] In some embodiments, the electrode assembly hot pressing device further includes a feeding assembly 80 for automatically feeding the carrier 2. For example... Figure 18 and Figure 19As shown, the feeding assembly 80 includes a feeding platform 800 connected to the table 60 and a third drive device 801 connected to the feeding platform 800. The feeding platform 800 is provided with a second guide groove 802 that mates with the first guide groove 716. The carrier 2 is slidably engaged with the second guide groove 802 and can move within the second guide groove 802 and along the second guide groove 802 into the first guide groove 716. The third drive device 801 can drive the carrier 2 to perform linear motion. Its type is not limited, as long as it can drive the insert block 711 to perform linear reciprocating motion. Preferably, the second drive device 710 is a cylinder, an electric cylinder, or an electric push rod. Figure 18 and Figure 19 The third drive device 801 shown is a cylinder. When its 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 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. After the second drive device 710 extends, the insert block 71 engages with the positioning groove 22 to realize the positioning of the carrier 2 on the floating platform 53.

[0100] The step of placing the carrier 2 into the second guide groove 802 can be done manually or by other automated devices, such as using a robotic arm to grip the carrier 2 and place it into the second guide groove 802. Since the feeding assembly 80 can automatically move the carrier 2 in the second guide groove 802 to the floating platform 53, there is no need to manually place the carrier 2 on the floating platform 53 for positioning, making the placement and positioning of the carrier 2 more convenient and the operation safer.

[0101] like Figure 16 and Figure 17 As shown, the first guide rail 714 has a first guide hole 7141 communicating with the first guide groove 716. The horizontal positioning assembly 71 also includes a mounting block 717 connected to the first guide rail 714, a push block 718 slidably engaged with the first guide hole 7141, and a spring 719 connected between the mounting block 717 and the push block 718. The two ends of the spring 719 abut against the mounting block 717 and the push block 718 respectively, and apply a pushing force to the push block 718 toward the first guide groove 716, so that the push block 718 partially extends into the first guide groove 716. The end of the push block 718 is provided with an inclined surface 7180 at least facing the side where the carrier 2 enters. In this way, when the carrier 2 moves to the push block 718 in the first guide groove 716, it can squeeze the push block 718 through the inclined surface 7180, causing the push block 718 to retract. At the same time, the spring 719 can apply elastic force to the push block 718 to drive the carrier 2 to fit against the second guide rail 715, thereby achieving pre-positioning.

[0102] Since the pusher block 718 can automatically drive the carrier 2 to fit against the second guide rail 715, the width of the first guide groove 716 can be made larger, making it easier for the carrier 2 to smoothly enter the first guide groove 716 from the second guide groove 802. At the same time, the pusher block 718 can apply resistance to the carrier 2 to prevent the carrier 2 from sliding in the first guide groove 716 and causing inaccurate positioning, which would affect the positioning of the subsequent insert block 711, effectively ensuring the reliable operation of the equipment.

[0103] Further reference Figure 18 and Figure 19 The electrode assembly hot pressing equipment also includes a discharge platform 81 connected to the platform 60. The discharge platform 81 is inclined, with one end tilted upwards and adjacent to the floating platform 53, and the other end tilted downwards. The discharge platform 81 and the feed platform 800 are located on both sides of the floating platform 53, and each has a third guide groove 810 that connects to the first guide groove 716. The third guide groove 810 tilts downwards in a direction away from the first guide groove 716.

[0104] When the third drive device 801 drives the carrier 2 in the second guide groove 802 to move into the first guide groove 716, the newly moved carrier 2 in the first guide groove 716 pushes the carrier 2 originally located in the first guide groove 716 into the third guide groove 810, and slides down the third guide groove 810. A conveyor belt or material box can be set at the outlet of the third guide groove 810 to transfer or retrieve the slid-down carrier 2. In this way, the feeding and discharging of the carrier 2 can be realized through a single third drive device 801, which has a simple and ingenious structure and lower cost.

[0105] like Figure 11 As shown, in order to facilitate the adjustment of the relative positions of the first guide groove 716 with the second guide groove 802 and the third guide groove 810, the lifting and pressing device also includes a fixing ring 58 connected to the first guide shaft 51. The fixing ring 58 is located above the floating platform 53 and is used to limit the maximum height position of the floating platform 53 under the lifting of the elastic support member 54. The position of the fixing ring 58 on the first guide shaft 51 is adjustable, so that the relative positions of the first guide groove 716 with the second guide groove 802 and the third guide groove 810 in the height direction (Z-axis direction) can be easily adjusted to ensure that the carrier 2 can smoothly enter the other guide groove along one guide groove.

[0106] In some embodiments, the electrode assembly hot pressing device further includes a pressing amount adjustment component. This component adjusts the pressing amount of the first hot pressing head 40 and the second hot pressing head 41 on the electrode assembly 1. By controlling the pressing amount, excessive compression of the electrode assembly 1 can be prevented, thereby better controlling the extension of the insulating adhesive layer 11 in the planar direction and preventing excessive inward or outward extension, which is beneficial for further improving product quality and yield. The pressing amount of the electrode assembly 1 can be controlled by controlling the distance between the first hot pressing head 40 and the second hot pressing head 41 during pressing. The smaller the distance between the two hot pressing heads, the smaller the pressing amount; conversely, the larger the distance, the larger the pressing amount.

[0107] Since the second hot press head 41 is fixed, the distance between the first hot press head 40 and the second hot press head 41 when pressing the electrode assembly 1 can be controlled by limiting the lowest position of the first hot press head 40, that is, controlling the amount of pressing of the electrode assembly 1.

[0108] like Figure 11 As shown, in a preferred embodiment, the pressing amount adjustment component includes a first limiting member 830 and a second limiting member 831 arranged opposite to each other. The first limiting member 830 is connected to the lifting plate 52 and extends toward the platform 60, and the second limiting member 831 is connected to the platform 60 and extends toward the lifting plate 52. The first limiting member 830 and the second limiting member 831 are arranged directly opposite each other. When the lifting plate 52 descends to the point where the first limiting member 830 and the second limiting member 831 contact each other, it descends to its lowest position, and the corresponding first hot pressing head 40 is also at its lowest position. At this time, the electrode assembly 1 is pressed by the two hot pressing heads. Obviously, by controlling the extent to which the lifting plate 52 can descend, the distance between the two hot pressing heads during pressing can be controlled, thereby controlling the pressing amount of the two hot pressing heads on the electrode assembly 1.

[0109] It is understood that in other embodiments, only the first limiting member 830 may be provided on the lifting plate 52, and when the first limiting member 830 contacts the platform 60, the lifting plate 52 and the first hot press head 40 are in the lowest position. Alternatively, only the second limiting member 831 may be provided on the platform 60, and when the second limiting member 831 contacts the lifting plate 52, the lifting plate 52 and the first hot press head 40 are in the lowest position.

[0110] The first limiting member 830 and the second limiting member 831 can be configured with an adjustable extension distance, for example, they can be threaded connections, and their extension distance can be adjusted so as to adjust the lowest position of the lifting plate 52 and the first hot press head 40.

[0111] The compression amount adjustment component can also adopt other structures. In a preferred embodiment, refer to Figure 10The first driving device 55 includes a body 550 and a driving rod 551 that can telescopically move 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 below the mounting plate 61 and connects to the lifting plate 52, thereby driving the lifting plate 52 to move up and down. The pressing amount adjustment assembly includes a second guide shaft 832 that is slidably engaged with the mounting plate 61, and a first connector 833 and a second connector 834 that are both connected to the second guide shaft 832. The first connector 833 is located below the mounting plate 61 and connects between the second guide shaft 832 and the driving rod 551, so that the second guide shaft 832 can move up and down simultaneously with the driving rod 551. The second connector 834 is located above the main body 550, and a third limiting member 835 located above the main body 550 is connected to it. When the drive rod 551 extends, it drives the second guide shaft 832, the second connector 834 and the third limiting member 835 to descend. When the third limiting member 835 contacts the top of the main body 550, the lifting plate 52 and the first hot press head 40 are at their lowest positions.

[0112] The third limiting member 835 is preferably a bolt, which is threadedly connected to the second connecting member 833. In this way, the distance between the third limiting member 835 and the body 550 is adjustable so as to adjust the lowest position of the lifting plate 52 and the first hot press head 40.

[0113] like Figure 10 As shown, there are two second guide shafts 832, located on both sides of the body 550 respectively. The two ends of the first connector 833 and the second connector 834 are connected to the two second guide shafts 832. In this way, the connection between them and the second guide shafts 832 is more secure, and the third limiting member 835 is less likely to be deformed or loosened when it comes into contact with the body 550, making the limiting more reliable.

[0114] It is understood that the controller is electrically connected to the first drive device 55, the second drive device 710, and the third drive device 801, and is capable of controlling each drive device. The controller may include one or more commonly used industrial control devices such as PLCs, industrial PCs, and computers. It can control the third drive device 801, the second drive device 710, and the first drive device 55 to operate sequentially through a preset program to realize the feeding, pressing, and discharging processes. It may also be equipped with control buttons 90 to control the operation of each drive device, thereby achieving individual control of each step.

[0115] The above-mentioned electrode assembly hot pressing equipment can typically employ the following working process:

[0116] S1. Place the carrier 2 carrying the electrode assembly 1 into the second guide groove 802 of the feeding platform 800;

[0117] S2. The carrier 2 located on the feeding platform 800 is driven into the first guide groove 716 by the third drive device 801;

[0118] S3. The second drive device 710 drives the plug 71 to be inserted into the positioning slot 22 of the carrier 2;

[0119] S4 drives the lifting plate 52 and the first hot press head 40 to descend via the first driving device 55. During the descent, the longitudinal positioning component 70 first abuts against the carrier 2 and fixes the carrier 2 on the floating platform 53. Then the first hot press head 40 abuts against the electrode assembly 1. After that, the fixing member 57 abuts against the floating platform 53 and drives the floating platform 53 to descend, so that the first hot press head 40 and the second hot press head 41 are pressed together on both sides of the electrode assembly 1.

[0120] S5. After maintaining the pressed state for a predetermined time, the first drive device 55 drives the lifting plate 52 to rise, so that the first hot press head 40 and the second hot press head 41 are separated from the electrode assembly 1.

[0121] The present invention also proposes a hot-pressing method for an electrode assembly, which includes the following steps:

[0122] The outer edge of the electrode assembly 1 is fixed by the carrier 2. The electrode assembly 1 includes a stacked plate 10, an insulating adhesive layer 11 and an electrode 12.

[0123] The first hot press head 40 and the second hot press head 41 are driven to press the electrode assembly 1 located on the carrier 2 from both sides;

[0124] After a preset pressure holding time, the first hot press head 40 and the second hot press head 41 are driven to separate from the electrode assembly 1.

[0125] Preferably, when pressing the electrode assembly 1 located on the carrier 2, the distance between the two hot pressing heads is controlled so that the distance between the two hot pressing heads is kept at a preset distance, thereby controlling the amount of pressing on the electrode assembly 1.

[0126] The hot pressing method for electrode assemblies can be implemented using the electrode assembly hot pressing equipment described above. By hot pressing electrode assembly 1 on both sides and controlling the holding time, the connection strength and product quality of electrode assembly 1 can be effectively improved, while the product consistency is also better.

[0127] The above are merely specific embodiments of the present invention, and any improvements made based on the concept of the present invention shall be considered within the scope of protection of the present invention.

Claims

1. A hot pressing device for electrode assemblies, characterized in that, include: A carrier (2) is used to carry at least one electrode assembly (1), the electrode assembly (1) including a stacked plate (10), an insulating adhesive layer (11) and an electrode (12), the outer edge of the plate (10) extending beyond the outside of the insulating adhesive layer (11) and the electrode (12), and the carrier (2) fixing the outer edge of the plate (10); The pressure head assembly includes a first hot pressure head (40) and a second hot pressure head (41) located on both sides of the carrier (2); and, A lifting and pressing device is used to drive 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 both sides. The carrier (2) includes 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 pressure ring (210) that cooperates with the annular boss (200) to fix the outer edge of the plate body (10). The electrode (12) is connected to the pressure ring (210).

2. The electrode assembly hot pressing equipment as described in claim 1, characterized in that, It also includes a controller electrically connected to the lifting and pressing device, the first hot press head (40) and the second hot press head (41), the controller being used to control the time when the first hot press head (40) and the second hot press head (41) press the electrode assembly (1) and the temperature of the first hot press head (40) and the second hot press head (41).

3. The electrode assembly hot pressing equipment as described in claim 1, characterized in that, The pressure ring (210) and the annular boss (200) are arranged on the same axis.

4. The electrode assembly hot pressing equipment as described in claim 3, characterized in that, The carrier (2) further includes a first through hole (201) coaxially arranged with the annular boss (200), the plate (10) is fitted into the first through hole (201), and the pressure ring (210) extends into the first through hole (201) and abuts against the outer edge of the plate (10).

5. The electrode assembly hot pressing equipment as described in claim 3, characterized in that, The first hot press head (40) includes a first hot press block (400) and a first heating device (401) for heating the first hot press block (400). The first hot press block (400) includes an outwardly protruding first heating column (4000), which is correspondingly arranged with the pressure ring (210). The second hot press head (41) includes a second hot press block (410) and a second heating device (411) for heating the second hot press block (410). The second hot press block (410) includes an outwardly protruding second heating column (4100), which is correspondingly arranged with the annular boss (200). When pressing the electrode assembly (1), the first heating column (4000) and the second heating column (4100) cooperate to press the electrode assembly (1).

6. The electrode assembly hot pressing apparatus according to any one of claims 1 to 5, characterized in that, It also includes a frame (6), which includes a platform (60). The lifting and pressing device includes a first guide shaft (51) connected to the platform (60), a lifting plate (52) located above the platform (60) and slidably coupled to the first guide shaft (51), a floating platform (53) located between the platform (60) and the lifting plate (52) and slidably coupled to the first guide shaft (51), and an elastic support member (54) connected between the floating platform (53) and the platform (60). The carrier (2) is located on the floating platform (53). The first hot press head (40) is connected to the lifting plate (52), and the second hot press head (41) is connected to the platform (60). The lifting and pressing device also includes a first drive device (55) connected to the frame (6) and used to drive the lifting plate (52) to perform lifting and pressing movements.

7. The electrode assembly hot pressing device as described in claim 6, characterized in that, The lifting and pressing device also includes a fixing ring (58) connected to the first guide shaft (51), the fixing ring (58) being used to limit the highest position of the floating platform (53).

8. The electrode assembly hot pressing device as described in claim 6, characterized in that, The lifting and pressing device also includes a pressing component connected to the lifting plate (52). During the descent of the lifting plate (52), the first hot pressing head (40) first contacts the electrode assembly (1), and then the pressing component abuts against the floating platform (53) and drives the floating platform (53) to descend.

9. The electrode assembly hot pressing device as described in claim 8, characterized in that, 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. The pressing assembly abuts against the floating platform (53) through the fixing member (57) and drives the floating platform (53) to descend.

10. The electrode assembly hot pressing device as described in claim 9, characterized in that, It also includes a longitudinal positioning component (70) that is driven to rise and fall by the lifting plate (52). During the descent of the lifting plate (52), the longitudinal positioning component (70) first contacts the carrier (2) and presses the carrier (2) onto the floating platform (53). Then the first hot press head (40) contacts the electrode component (1).

11. The electrode assembly hot pressing device as described in claim 10, characterized in that, The longitudinal positioning assembly (70) includes a crossbeam (700) connected to the connecting column (56), a top rod (701) slidably engaged with the crossbeam (700), a fixing block (703) connected to the crossbeam (700), and an elastic element (702) connected between the fixing block (703) and the top rod (701), the elastic element (702) pressing the top rod (701) toward the side where the carrier (2) is located.

12. The electrode assembly hot pressing device as described in claim 6, characterized in that, The electrode assembly hot pressing device further includes a horizontal positioning component (71), which is used to position the carrier (2) in the horizontal direction on the floating platform (53). The horizontal positioning component (71) includes a first guide rail (714) and a second guide rail (715) spaced apart on the floating platform (53). 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 engaged in the first guide groove (716).

13. The electrode assembly hot pressing device as described in claim 12, characterized in that, The first guide rail (714) has a notch (7140) communicating with the first guide groove (716). The side of the carrier (2) is provided with a positioning groove (22). The horizontal positioning component (71) includes a second drive device (710) and a plug (711) connected to the second drive device (710). The plug (711) is at least partially adapted to the positioning groove (22). The second drive device (710) is used to drive the plug (711) to be inserted into the positioning groove (22).

14. The electrode assembly hot pressing device as described in claim 12, characterized in that, It also includes a feeding assembly (80), which includes a feeding platform (800) and a third driving device (801). The feeding platform (800) is provided with a second guide groove (802) that docks with the first guide groove (716). The third driving device (801) is used to drive the carrier (2) in the second guide groove (802) to move into the first guide groove (716).

15. The electrode assembly hot pressing device as described in claim 14, characterized in that, It also includes a discharge platform (81), which is provided with a third guide groove (810) that is connected to the first guide groove (716). The third drive device (801) is used to drive the carrier (2) in the first guide groove (716) to move into the third guide groove (810).

16. The electrode assembly hot pressing device as described in claim 6, characterized in that, It includes a pressing amount adjustment component, which controls the pressing amount of the electrode assembly (1) by controlling the distance between the first hot press head (40) and the second hot press head (41) when pressing the electrode assembly (1).

17. The electrode assembly hot pressing device as described in claim 16, characterized in that, The pressing amount adjustment component controls the distance between the first hot pressing head (40) and the second hot pressing head (41) when pressing the electrode assembly (1) by controlling the lowest position of the first hot pressing head (40) as it descends. The pressing amount adjustment assembly includes a first limiting member (830) connected to the lifting plate (52). When the first limiting member (830) descends to abut against the platform (60), the first hot press head (40) is in its lowest position; or, The pressing amount adjustment assembly includes a second limiting member (831) connected to the platform (60). When the lifting plate (52) descends to abut against the second limiting member (831), the first hot press head (40) is in its lowest position; or, The pressing amount adjustment component includes a first limiting member (830) connected to the lifting plate (52) and a second limiting member (831) connected to the platform (60). When the first limiting member (830) descends to abut against the second limiting member (831), the first hot press head (40) is in the lowest position.

18. The electrode assembly hot pressing device as described in claim 16, characterized in that, The frame (6) includes a mounting plate (61) located above the lifting plate (52), and the first driving device (55) includes a body (550) connected to the mounting plate (61) and a driving rod (551) that performs telescopic movement relative to the body (550). The driving rod (551) is connected to the lifting plate (52). The pressing amount adjustment component controls the distance between the first hot pressing head (40) and the second hot pressing head (41) when pressing the electrode assembly (1) by controlling the lowest position of the first hot pressing head (40) descending. It includes a second guide shaft (832) that is slidably coupled to the mounting plate (61). One end of the second guide shaft (832) is connected to the drive rod (551) through a first connector (833), and the other end is connected to a second connector (834). The pressing amount adjustment component also includes a third limiting member (835) located above the body (550). When the third limiting member (835) contacts the body (550), the first hot pressing head (40) is at its lowest position.

19. A hot-pressing method for an electrode assembly, characterized in that, The hot pressing method for the electrode assembly, implemented using the electrode assembly hot pressing apparatus as described in any one of claims 1 to 18, comprises the following steps: The outer edge of the electrode assembly (1) is fixed by a carrier (2). The electrode assembly (1) includes a stacked plate (10), an insulating adhesive layer (11), and an electrode (12). Drive the first hot press head (40) and the second hot press head (41) to press the electrode assembly (1) located on the carrier (2) from both sides; After a preset pressure holding time, the first hot press head (40) and the second hot press head (41) are driven to separate from the electrode assembly (1).

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