Battery lamination hot-pressing equipment and battery lamination hot-pressing method

Abstract

The invention provides battery lamination hot-pressing equipment and a battery lamination hot-pressing method, and relates to the technical field of battery processing. The battery lamination hot-pressing equipment comprises an upper hot-pressing assembly, a lower hot-pressing assembly, a flexible supporting assembly, a jacking assembly and a clamping assembly, the upper hot-pressing assembly and the lower hot-pressing assembly are oppositely arranged up and down; the flexible supporting assembly comprises a flexible layer, and the flexible layer is unfolded above the lower hot pressing assembly; the output end of the jacking assembly is used for ascending and descending to drive the flexible layer above the output end to ascend and descend, and the flexible layer is used for being deformed into a table body structure when the output end of the jacking assembly ascends; the clamping assembly can move to the peripheral side of the table body structure so that the clamped bare battery cell can abut against the top of the table body structure. According to the battery lamination hot-pressing equipment, through mutual cooperation of the clamping assembly, the flexible layer and the jacking assembly, a bare battery cell can be stably transferred to the lower hot-pressing assembly, dislocation between positive and negative pole pieces of the bare battery cell is prevented, and the structural stability of the bare battery cell in the transferring, placing and hot-pressing processes is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery processing, in particular to a battery lamination hot-pressing device and a battery lamination hot-pressing method. BACKGROUND

[0002] The solid-state battery manufacturing process adopts a lamination process. Compared with the lamination manufacturing process of a traditional lithium battery, the lamination manufacturing process of a solid-state battery is established on the basis of the existing lithium battery manufacturing process, but the solid-state battery cancels the separator between the electrode sheets.

[0003] In the current lamination manufacturing process of a solid-state battery, the positive and negative electrode sheets are first laminated to form a bare battery cell, and then the bare battery cell is transferred to a hot-pressing station for hot-pressing and fixing by using a belt translation conveying method. Since the solid-state battery cancels the separator, the bare battery cell is no longer constrained by the separator, and at this time the positive and negative electrode sheets are in a loose state. Therefore, during the transfer, placement and hot-pressing of the laminated bare battery cell, the positive and negative electrode sheets are prone to misalignment and difficult to align.

[0004] If the positive and negative electrode sheets in the battery are not aligned, when the battery is subjected to external pressure operation such as pressure charging and discharging in the later stage, the greater the internal shear force of the battery, which is not conducive to the stability of the battery structure. When the pressure is increased, internal short circuit may even occur due to excessive shear force, thereby causing the battery to fail and posing a danger. SUMMARY

[0005] The present application aims to provide a battery lamination hot-pressing device and method to alleviate the technical problem that in the prior art, during the transfer, placement and hot-pressing of a bare battery cell in the lamination manufacturing process of a solid-state battery, the positive and negative electrode sheets of the bare battery cell are prone to misalignment and difficult to align, which leads to a large internal shear force of the battery when the battery is subjected to external pressure operation such as pressure charging and discharging in the later stage, which is not conducive to the stability of the battery structure, and even causes short circuit, resulting in battery failure and danger.

[0006] In a first aspect, the present application provides a battery lamination hot-pressing device, comprising an upper hot-pressing assembly, a lower hot-pressing assembly, a flexible support assembly, a jacking assembly and a clamping assembly; The upper hot-pressing assembly and the lower hot-pressing assembly are arranged oppositely and can move relative to each other; The flexible support assembly comprises a flexible layer, which extends into the space between the upper hot-pressing assembly and the lower hot-pressing assembly, and the flexible layer is unfolded above the lower hot-pressing assembly; The output end of the jacking assembly can extend into the space between the flexible layer and the lower hot-pressing assembly, and is used to lift the flexible layer above it, and the flexible layer is used to deform into a columnar structure when the output end of the jacking assembly is lifted; The clamping assembly is used to clamp the bare battery cell after lamination, and the clamping assembly can be moved to the periphery of the table body structure so that the bare battery cell clamped thereby abuts against the top of the table body structure.

[0007] In an optional embodiment, the flexible support assembly further comprises a plurality of tensioning mechanisms arranged at the periphery of the lower hot-pressing assembly, each of the plurality of tensioning mechanisms being connected to the flexible layer and applying tension to the flexible layer so as to expand the flexible layer.

[0008] In an optional embodiment, the flexible layer is attached to the top of the lower hot-pressing assembly. The tensioning mechanism comprises a winding member and a lifting member, the winding member being connected to the flexible layer and being used to wind and unwind the flexible layer, and the lifting member being arranged below the flexible layer between the winding member and the lower hot-pressing assembly and being able to lift and lower so as to drive the flexible layer above the lower hot-pressing assembly to lift and lower.

[0009] In an optional embodiment, the tensioning mechanism further comprises a tensioning member arranged between the winding member and the lifting member and connected to the flexible layer, the tensioning member being able to lift and lower so as to tighten or loosen the flexible layer.

[0010] In an optional embodiment, a translation assembly is further included, the translation assembly and the jacking assembly are both arranged at the periphery of the lower hot-pressing assembly, and the jacking assembly is mounted to the output end of the translation assembly, the translation assembly being used to drive the jacking assembly to move so that the output end of the jacking assembly enters and exits between the flexible layer and the lower hot-pressing assembly.

[0011] In an optional embodiment, the jacking assembly is two, the two jacking assemblies are arranged at the two sides of the lower hot-pressing assembly respectively, and the output end of each jacking assembly is fixed with a horizontally arranged jacking plate, the two jacking plates being used to butt and be located on the same horizontal plane when the output ends of the two jacking assemblies both extend into between the flexible layer and the lower hot-pressing assembly.

[0012] In an optional embodiment, the clamping assembly comprises a first clamping jaw and a second clamping jaw arranged at intervals, the first clamping jaw being used to clamp the position of the bare battery cell close to one end thereof, the second clamping jaw being used to clamp the position of the bare battery cell close to the other end thereof, and the first clamping jaw and the second clamping jaw being able to be located at the two sides of the table body structure respectively when the clamping assembly is moved to the periphery of the table body structure.

[0013] In an optional embodiment, the lower hot-pressing assembly comprises a lower pressing plate, a lower driving mechanism and a lower heating member. The lower pressing plate is fixed to an output end of the lower driving mechanism, and the lower driving mechanism is used to drive the lower pressing plate to ascend or descend to approach or move away from the upper hot pressing assembly. The lower heating member is arranged on a side of the lower pressing plate which is opposite to the upper hot pressing assembly, and the lower heating member is used to generate heat and transfer the heat to the lower pressing plate.

[0014] In an optional embodiment, the upper hot pressing assembly comprises an upper pressing plate, an upper driving mechanism and an upper heating member. The upper pressing plate is fixed to an output end of the upper driving mechanism, and the upper driving mechanism is used to drive the upper pressing plate to ascend or descend to move away from or approach the lower hot pressing assembly. The upper heating member is arranged on a side of the upper pressing plate which is opposite to the upper hot pressing assembly, and the upper heating member is used to generate heat and transfer the heat to the upper pressing plate.

[0015] In a second aspect, the present application provides a battery lamination hot pressing method, which applies the battery lamination hot pressing device as described in any one of the preceding embodiments, and comprises the following steps: The output end of the jacking assembly is inserted between the flexible layer and the lower hot pressing assembly, and then the output end of the jacking assembly is lifted to deform the flexible layer above the lower hot pressing assembly into a table body structure; The clamping assembly is used to clamp the bare battery cell after lamination, and then the clamping assembly is moved to the periphery of the table body structure and the bare battery cell clamped by the clamping assembly is abutted against the top of the table body structure; After the clamping assembly releases the bare battery cell, the clamping assembly moves away from the table body structure, and at the same time, the output end of the jacking assembly is lowered to drive the top of the table body structure and the bare battery cell thereon to descend, until the flexible layer moves to the original position; The output end of the jacking assembly is withdrawn from between the flexible layer and the lower hot pressing assembly, and then the upper hot pressing assembly and the lower hot pressing assembly are relatively moved to approach each other to hot press the bare battery cell.

[0016] The battery lamination hot-pressing equipment provided by the application comprises an upper hot-pressing assembly, a lower hot-pressing assembly, a flexible support assembly, a jacking assembly and a clamping assembly; the upper hot-pressing assembly and the lower hot-pressing assembly are arranged oppositely and can move relatively; the flexible support assembly comprises a flexible layer, the flexible layer extends into the space between the upper hot-pressing assembly and the lower hot-pressing assembly, and the flexible layer is unfolded above the lower hot-pressing assembly; the output end of the jacking assembly can extend into the space between the flexible layer and the lower hot-pressing assembly, the output end of the jacking assembly is used to lift and drive the flexible layer above it to lift, and the flexible layer is used to deform into a platform structure when the output end of the jacking assembly rises; the clamping assembly is used to clamp the bare battery cell formed by lamination of positive and negative electrode sheets, and the clamping assembly can move to the periphery of the platform structure to make the bare battery cell clamped by it abut against the top of the platform structure. The battery lamination hot-pressing equipment provided by the application is used to hot-press the bare battery cell formed by lamination of positive and negative electrode sheets. In the use process, the jacking assembly is started first to drive the flexible layer above it to rise until the flexible layer deforms into a platform structure, then the clamping assembly is used to clamp the bare battery cell formed by lamination of positive and negative electrode sheets, and then the clamping assembly is transferred to the periphery of the platform structure and makes the bare battery cell clamped by the clamping assembly abut against the top of the platform structure. Because there is an open space in the periphery of the platform structure, when the bare battery cell clamped by the clamping assembly abuts against the top of the platform structure, the clamping assembly can be stably positioned in the open space and will not contact the flexible layer, and after the clamping assembly is released, the clamping assembly can also exit from the open space in the periphery of the platform structure and move away from the bare battery cell, preventing the clamping assembly from generating horizontal friction force on the bare battery cell and causing the positive and negative electrode sheets of the bare battery cell to be misaligned. It should be noted that in the process of transferring the bare battery cell by the clamping assembly, the clamping force of the clamping assembly on the bare battery cell is perpendicular to the positive and negative electrode sheets of the bare battery cell. Compared with the belt translation conveying mode in the prior art, the clamping assembly will not generate horizontal friction force on the bare battery cell, thereby effectively ensuring the structural stability of the bare battery cell and preventing the positive and negative electrode sheets of the bare battery cell from being misaligned and difficult to align. After the clamping assembly moves away from the bare battery cell on the top of the platform structure, the jacking assembly is started again to drive the top of the platform structure and the bare battery cell to descend synchronously until the flexible layer and the bare battery cell are both located on the lower hot-pressing assembly. Because the flexible layer supports the bare battery cell during the descending process of the bare battery cell, and the friction force of the flexible layer on the bare battery cell is greater than that of a rigid structure, the structural stability of the bare battery cell can also be ensured during the descending process of the bare battery cell, and the positive and negative electrode sheets in the bare battery cell are also not prone to misalignment. After the bare battery cell is placed on the lower hot-pressing assembly, the upper hot-pressing assembly and the lower hot-pressing assembly are moved relatively close to each other to hot-press the bare battery cell. Because the flexible layer is always laid between the bare battery cell and the lower hot-pressing assembly during the hot-pressing process, the bare battery cell can rely on the flexible layer to increase the friction force and is not prone to misalignment, thereby effectively ensuring the structural stability of the bare battery cell during the hot-pressing process.

[0017] Compared with the prior art, the battery lamination hot pressing equipment provided by the application can stably transfer the bare battery cell to the flexible layer through the clamping assembly, and then stably transfer the bare battery cell to the lower hot pressing assembly through the cooperation of the flexible layer and the jacking assembly. In the transfer process, the flexible layer can increase the friction of the bare battery cell to prevent misalignment between the positive and negative electrode sheets, thereby effectively ensuring the stability of the bare battery cell during transfer, placement and hot pressing, and preventing misalignment between the positive and negative electrode sheets to cause unstable or ineffective battery structure.

[0018] The battery lamination hot pressing method provided by the application applies the above-mentioned battery lamination hot pressing equipment, and includes the following steps: extending the output end of the jacking assembly into the space between the flexible layer and the lower hot pressing assembly, and then raising the output end of the jacking assembly to deform the flexible layer above the lower hot pressing assembly into a platform structure; clamping the bare battery cell after lamination by the clamping assembly, and then moving the clamping assembly to the side of the platform structure and abutting the bare battery cell clamped by the clamping assembly against the top of the platform structure; moving the clamping assembly away from the platform structure after releasing the bare battery cell, and at the same time, lowering the output end of the jacking assembly to drive the top of the platform structure and the bare battery cell thereon to descend until the flexible layer moves to the original position; withdrawing the output end of the jacking assembly from the space between the flexible layer and the lower hot pressing assembly, and then moving the upper hot pressing assembly and the lower hot pressing assembly relatively close to each other to hot press the bare battery cell. The battery lamination hot pressing method provided by the application applies the above-mentioned battery lamination hot pressing equipment, and thus has the same beneficial effects as the above-mentioned battery lamination hot pressing equipment. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 A side view of the battery lamination hot pressing equipment provided by the embodiment of the application; Figure 2 A partial structure schematic view of the battery lamination hot pressing equipment provided by the embodiment of the application; Figure 3 A flowchart of the battery lamination hot pressing method provided by the embodiment of the application.

[0021] Icons: 1-Upper hot pressing assembly; 10-Upper pressure plate; 11-Upper drive mechanism; 12-Upper heating element; 13-Upper pressure fixing plate; 14-Upper pressure liner; 15-Upper pressure support rod; 16-Upper pressure top plate; 17-Upper heat insulation plate; 2-Lower hot pressing assembly; 20-Lower pressure plate; 21-Lower drive mechanism; 22-Lower heating element; 23-Lower pressure fixing plate; 24-Lower pressure liner; 25-Lower pressure support rod; 26-Lower pressure top plate; 27-Lower heat insulation plate; 3-Flexible support assembly; 30-Flexible layer; 31-Tensioning mechanism; 310-Rewinding component; 311-Lifting component; 312-Tensioning component; 313-Roller component; 4-Lifting assembly; 40-Lifting plate; 41-Lifting fixing plate; 42-Lifting guide rod; 5-Clamping assembly; 6-Bare battery cell; 7-Translation assembly; 70-Translation fixing plate. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] Example: like Figure 1 and Figure 2As shown, the battery stacking hot pressing equipment provided in this embodiment includes an upper hot pressing assembly 1, a lower hot pressing assembly 2, a flexible support assembly 3, a lifting assembly 4, and a clamping assembly 5. The upper hot pressing assembly 1 and the lower hot pressing assembly 2 are arranged vertically opposite each other and can move relative to each other. The flexible support assembly 3 includes a flexible layer 30, which extends between the upper hot pressing assembly 1 and the lower hot pressing assembly 2 and unfolds above the lower hot pressing assembly 2. The output end of the lifting assembly 4 can extend between the flexible layer 30 and the lower hot pressing assembly 2. The output end of the lifting assembly 4 is used to lift and lower to drive the flexible layer 30 above it to lift and lower. The flexible layer 30 is used to form a platform structure when the output end of the lifting assembly 4 rises. The clamping assembly 5 is used to clamp the bare battery cell 6 after stacking, and the clamping assembly 5 can move to the periphery of the platform structure so that the bare battery cell 6 it clamps abuts against the top of the platform structure.

[0026] The battery stacking hot pressing equipment provided in this embodiment is used to hot press the bare battery cell 6 formed by stacking positive and negative electrode sheets. During use, the lifting component 4 is first activated to drive the flexible layer 30 above it to rise until the flexible layer 30 is formed into a platform structure. Then, the clamping component 5 is used to clamp the bare battery cell 6 formed by stacking positive and negative electrode sheets. The clamping component 5 is then transferred to the periphery of the platform structure, and the bare battery cell 6 clamped by the clamping component 5 is brought into contact with the top of the platform structure. Since there is an open space on the periphery of the platform structure, when the bare battery cell 6 clamped by the clamping component 5 is brought into contact with the top of the platform structure, the clamping component 5 can be stably positioned in the open space and will not contact the flexible layer 30. Furthermore, after the clamping component 5 is released, it can also be withdrawn from the open space on the periphery of the platform structure and move away from the bare battery cell 6, preventing the clamping component 5 from generating horizontal friction force on the bare battery cell 6, which would cause misalignment of the positive and negative electrode sheets of the bare battery cell 6.

[0027] It should be noted that during the process of clamping and transferring the bare cell 6 by the clamping component 5, the clamping force of the clamping component 5 on the bare cell 6 is perpendicular to the positive and negative electrode plates of the bare cell 6. Compared with the belt translation conveying method in the prior art, the clamping component 5 will not generate horizontal friction force on the bare cell 6, thereby effectively ensuring the structural stability of the bare cell 6 itself and making it less likely for the positive and negative electrode plates of the bare cell 6 to be misaligned and difficult to align.

[0028] Once the clamping assembly 5 is away from the bare cell 6 at the top of the platform structure, the lifting assembly 4 is activated to lower the platform structure and the bare cell 6 synchronously until both the flexible layer 30 and the bare cell 6 are on the lower hot-pressing assembly 2. Because the bare cell 6 is supported by the flexible layer 30 during its descent, and the flexible layer 30 exerts greater friction on the bare cell 6 compared to a rigid structure, the structural stability of the bare cell 6 is ensured during its descent, and the positive and negative electrode plates are less prone to misalignment. After the bare cell 6 is placed on the lower hot-pressing assembly 2, the upper hot-pressing assembly 1 and the lower hot-pressing assembly 2 are moved closer together to perform hot-pressing on the bare cell 6.

[0029] Because a flexible layer 30 is always laid between the bare cell 6 and the lower hot pressing assembly 2 during the hot pressing process, the bare cell 6 can rely on the flexible layer 30 to increase friction and is not easily misaligned, thereby effectively ensuring the structural stability of the bare cell 6 during the hot pressing process.

[0030] Compared with the prior art, the battery stacking hot pressing equipment provided in this embodiment can stably transfer the bare cell 6 onto the flexible layer 30 through the clamping component 5, and then use the flexible layer 30 and the lifting component 4 to stably transfer the bare cell 6 onto the lower hot pressing component 2. During the transfer process, the flexible layer 30 can increase the friction of the bare cell 6 to prevent misalignment between its positive and negative electrode plates, thereby effectively ensuring the stability of the bare cell 6 during the transfer, placement and hot pressing process, and preventing misalignment between the positive and negative electrode plates from causing battery structure instability or failure.

[0031] It should be noted that, in order to prevent the flexible layer 30 from being damaged during the hot pressing process, the material of the flexible layer 30 is preferably a heat-resistant material. In this embodiment, the flexible layer 30 is preferably a PET film (polyester film, abbreviated as PET film).

[0032] like Figure 1 and Figure 2 As shown, the flexible support assembly 3 also includes multiple tensioning mechanisms 31 disposed around the lower hot pressing assembly 2. The multiple tensioning mechanisms 31 are all connected to the flexible layer 30 and apply tension to the flexible layer 30 to make the flexible layer 30 unfold.

[0033] The tensioning mechanism 31 not only allows the flexible layer 30 to remain in an unfolded state above the lower hot-pressing component 2, but also allows the flexible layer 30 to have tension, thereby improving the support stability of the flexible layer 30 for the bare battery cell 6.

[0034] Furthermore, the flexible layer 30 is attached to the top of the lower hot-pressing assembly 2; the tensioning mechanism 31 includes a winding member 310 and a lifting member 311. The winding member 310 is connected to the flexible layer 30 and is used to wind up and unwind the flexible layer 30; the lifting member 311 is located below the flexible layer 30 between the winding member 310 and the lower hot-pressing assembly 2, and the lifting member 311 can move up and down to drive the flexible layer 30 above the lower hot-pressing assembly 2 to move up and down.

[0035] The winding component 310 not only fixes the position of the flexible layer 30, but also winds up or unwinds the flexible layer 30, making the flexible layer 30 more neat and orderly. In addition, when the flexible layer 30 deforms or is damaged over time, the winding component 310 can automatically replace the flexible layer 30.

[0036] The lifting component 311 is used to rise before the output end of the lifting component 4 extends between the flexible layer 30 and the lower hot-pressing component 2, thereby causing the flexible layer 30, which is attached to the top of the lower hot-pressing component 2, to rise until there is a gap between the flexible layer 30 and the top of the lower hot-pressing component 2 (the size of this gap is not limited and can be 20 mm). This gap allows the output end of the lifting component 4 to extend between the flexible layer 30 and the lower hot-pressing component 2, facilitating the lifting component 4 to extend between the flexible layer 30 and the lower hot-pressing component 2 from one side of the lower hot-pressing component 2, without having to extend between the flexible layer 30 and the lower hot-pressing component 2 from below through the perforation on the lower hot-pressing component 2.

[0037] Based on this, the lower hot pressing assembly 2 in this embodiment can adopt a monolithic structure instead of a split structure and does not need to adopt a structure with perforations, thereby avoiding quality problems such as indentations in the bare battery cell 6 during the hot pressing process.

[0038] Among them, the winding component 310 can be an electric winding shaft, and the lifting component 311 can be a telescopic drive such as a cylinder or hydraulic cylinder.

[0039] Furthermore, such as Figure 1 As shown, the tensioning mechanism 31 also includes a tensioning member 312, which is disposed between the winding member 310 and the lifting member 311, and is connected to the flexible layer 30. The tensioning member 312 can be raised and lowered to tighten or loosen the flexible layer 30.

[0040] When the lifting component 311 drives the flexible layer 30 attached to the top of the hot pressing component 2 to rise, the tensioning component 312 can also rise, thereby tightening the flexible layer 30 and keeping the flexible layer 30 in a taut state to prevent the flexible layer 30 from loosening.

[0041] In this embodiment, there can be two tensioning mechanisms 31, which are respectively arranged on both sides of the lower hot-pressing assembly 2. There are also two tensioning members 312. These two tensioning members 312 can not only cooperate to adjust the tension of the flexible layer 30, but also act as a buffer for the flexible layer 30. Specifically, the length of the flexible layer 30 buffered between the two tensioning members 312 must be greater than or equal to the length of the lower hot-pressing assembly 2.

[0042] like Figure 1 As shown, the tensioning mechanism 31 also includes a roller 313, which is disposed between the winding member 310 and the lifting member 311. The top of the roller 313 is higher than the top of the winding member 310, and the roller 313 abuts against the bottom of the flexible layer 30.

[0043] The roller 313 is used to rotate under the drive of the flexible layer 30 when the winding member 310 is winding or unwinding the flexible layer 30, thereby guiding and supporting the flexible layer 30, making the winding or unwinding process of the winding member 310 smoother.

[0044] like Figure 1 and Figure 2 As shown, the battery stacking hot pressing equipment provided in this embodiment also includes a translation component 7. Both the translation component 7 and the lifting component 4 are disposed on the periphery of the lower hot pressing component 2, and the lifting component 4 is installed at the output end of the translation component 7. The translation component 7 is used to drive the lifting component 4 to move so that the output end of the lifting component 4 moves in and out between the flexible layer 30 and the lower hot pressing component 2.

[0045] When the lifting component 311 drives the flexible layer 30 attached to the top of the lower hot pressing component 2 to rise, the translation component 7 starts and drives the lifting component 4 to move around the lower hot pressing component 2 until the output end of the lifting component 4 enters between the flexible layer 30 and the lower hot pressing component 2.

[0046] After the output end of the lifting component 4 enters between the flexible layer 30 and the lower hot-pressing component 2, the lifting component 4 is activated again, causing its output end to rise and drive the flexible layer 30 above it to rise. After the lifting component 4 further drives the flexible layer 30 to rise, for example, when the lifting component 4 lifts the flexible layer 30 to a height of 100 mm, the flexible layer 30 above the output end of the lifting component 4 is at a height of 100 mm, while the flexible layer 30 at the tensioning mechanism 31 remains at its original height. This causes the flexible layer 30 to transform into a platform structure, which can be frustum-shaped or trapezoidal. The space around the platform structure at this time serves as the loading and unloading position for the clamping component 5 to transfer the bare battery cell 6 to the top of the platform structure. This loading and unloading position allows the clamping component 5 to transfer the bare battery cell 6 to the top (i.e., the upper surface) of the platform structure without contacting the flexible layer 30.

[0047] In this embodiment, asFigure 2 As shown, there can be two lifting components 4. The two lifting components 4 are respectively set on both sides of the lower hot pressing component 2, and each lifting component 4 has a horizontally set lifting plate 40 fixed at its output end. The two lifting plates 40 are used to dock and be located on the same horizontal plane when the output ends of the two lifting components 4 extend between the flexible layer 30 and the lower hot pressing component 2.

[0048] The translation component 7 drives the lifting component 4 to move, so that when the output end of the lifting component 4 enters between the flexible layer 30 and the lower hot pressing component 2, the lifting plates 40 of the two lifting components 4 can simultaneously extend into the space between the flexible layer 30 and the lower hot pressing component 2 and dock to form a complete horizontal plate. At this time, the two lifting plates 40 cooperate with each other to support the flexible layer 30, which can effectively improve the stability of the deformation process of the flexible layer 30, thereby improving the support stability of the flexible layer 30 for the bare cell 6.

[0049] Furthermore, in this embodiment, it is preferable that the non-interlocking sides of the two lifting plates 40 are smoothly connected to the surface of the lifting plate 40. This smooth connection can ensure the uniformity of stress on the flexible layer 30 during the lifting process and prevent the flexible layer 30 from deforming.

[0050] The width of the lifting plate 40 is not limited. However, in order to ensure the stability of the support provided by the lifting plate 40 to the flexible layer 30 and the bare battery cell 6 on it, the width of the lifting plate 40 is preferably one-third of the length of the bare battery cell 6 in this embodiment.

[0051] To prevent the lifting plate 40 from interfering with the flexible layer 30, such as Figure 2 As shown, in this embodiment, the two lifting components 4 are preferably located on both sides of the two length directions of the flexible layer 30. Correspondingly, the translation component 7 is used to push the lifting component 4 to move along the width direction of the flexible layer 30 so that the lifting plate 40 moves in and out between the flexible layer 30 and the lower hot pressing component 2 along the width direction of the flexible layer 30.

[0052] During use, after the clamping component 5 places the bare battery cell 6 on top of the platform structure, the output end of the lifting component 4 is lowered to drive the bare battery cell 6 on the platform structure to descend. At this time, the clamping component 5 can maintain the state of clamping the bare battery cell 6 and descend together with the output end of the lifting component 4. Alternatively, the clamping component 5 can first release the bare battery cell 6 and return to the initial clamping state before the output end of the lifting component 4 is lowered. When the top of the platform structure descends to be flush with the output end of the lifting component 311, for example, when the top of the platform structure descends to 20 mm away from the top of the lower hot pressing component 2, the flexible layer 30 restores its deformation and continues to support the bare battery cell 6 under the support of the lifting component 311. Then, the output end of the lifting component 4 continues to descend until there is a gap between the output end of the lifting component 4 and the flexible layer 30. Then, the translation component 7 is activated to drive the lifting component 4 to exit between the flexible layer 30 and the lower hot pressing component 2.

[0053] After the lifting component 4 exits between the flexible layer 30 and the lower hot pressing component 2, the lifting component 311 can be activated to drive the flexible layer 30 down until the flexible layer 30 is reattached above the lower hot pressing component 2. At this time, the lower hot pressing component 2 supports the flexible layer 30 and the bare battery cell 6, which facilitates the subsequent hot pressing work.

[0054] In this embodiment, the lifting component 4 can be a lifting drive such as a lifting cylinder or a lifting hydraulic cylinder, while the translation component 7 can be a telescopic drive such as a telescopic cylinder or a translation conveying device such as a belt conveyor.

[0055] like Figure 1 and Figure 2 As shown, a lifting fixing plate 41 can also be installed at the output end of the lifting assembly 4. A lifting guide rod 42 is fixed above the lifting fixing plate 41, and the lifting plate 40 is fixed to the top of the lifting guide rod 42.

[0056] The lifting fixing plate 41 and the lifting guide rod 42 are used to raise the height of the lifting plate 40, so that the lifting plate 40 can easily move in and out between the flexible layer 30 and the lower hot pressing assembly 2.

[0057] like Figure 1 As shown, a translation fixing plate 70 can be fixed below the translation component 7, and the translation fixing plate 70 is used to support the translation component 7.

[0058] In this embodiment, as Figure 1 and Figure 2 As shown, the clamping assembly 5 may include a first clamp and a second clamp arranged at intervals. The first clamp is used to clamp the bare battery cell 6 at a position near one end of it, and the second clamp is used to clamp the bare battery cell 6 at a position near the other end of it. The first clamp and the second clamp can be located on both sides of the platform structure when the clamping assembly 5 moves to the periphery of the platform structure.

[0059] The first and second grippers can cooperate to improve the gripping stability of the clamping assembly 5 on the bare cell 6, and further prevent the positive and negative electrode plates of the bare cell 6 from being misaligned and difficult to align during the transfer process. At the same time, the first and second grippers can also optimize the structure of the clamping assembly 5, effectively preventing the clamping assembly 5 from contacting the flexible layer 30 when it moves to the periphery of the platform structure, thus affecting the structural stability of the bare cell 6.

[0060] To further improve the clamping stability of the clamping assembly 5 on the bare battery cell 6, both the first and second clamps can adopt a clamping plate structure. Specifically, the clamping plate structure includes two clamps arranged opposite each other, which can move closer to or further away from each other to realize the clamping or releasing function of the clamps.

[0061] like Figure 1 and Figure 2 As shown, the lower hot pressing assembly 2 includes a lower pressure plate 20, a lower drive mechanism 21, and a lower heating element 22; the lower pressure plate 20 is fixed to the output end of the lower drive mechanism 21, and the lower drive mechanism 21 is used to drive the lower pressure plate 20 to move up and down to approach or move away from the upper hot pressing assembly 1; the lower heating element 22 is disposed on the side of the lower pressure plate 20 opposite to the upper hot pressing assembly 1, and the lower heating element 22 is used to generate heat and transfer the heat to the lower pressure plate 20.

[0062] When the output end of the lifting component 311 causes the flexible layer 30 to descend, allowing it to re-adhere to the upper hot-pressing assembly 2, the lower pressure plate 20 in the lower hot-pressing assembly 2 supports the flexible layer 30 and the bare battery cell 6. At this point, the lower drive mechanism 21 and the lifting component 311 can be activated, causing the lower drive mechanism 21 to drive the lower pressure plate 20 upward. Simultaneously, the lifting component 311 drives the flexible layer 30 and the lower pressure plate 20 to rise synchronously. For example, after both the lower pressure plate 20 and the flexible layer 30 rise by 5 mm, the output ends of the lower drive mechanism 21 and the lifting component 311 remain fixed, thus ensuring that the lower pressure plate 20 and the flexible layer 30 and the bare battery cell 6 on it remain in a fixed position. At this time, the bare battery cell 6 on the lower pressure plate 20 can adhere to the upper hot-pressing assembly 1, or the upper hot-pressing assembly 1 can move downward until it adheres to the bare battery cell 6 on the lower pressure plate 20. Then the lower heating element 22 is activated, which generates heat and conducts it to the lower pressure plate 20, thereby realizing the hot pressing process of the bare battery cell 6.

[0063] The lower drive mechanism 21 can be a lifting drive such as a lifting cylinder.

[0064] Furthermore, such as Figure 1As shown, a downward pressure fixing plate 23 can be fixed to the output end of the downward drive mechanism 21. A downward pressure liner 24 is fixed above the downward pressure fixing plate 23. A downward pressure support rod 25 is fixed above the downward pressure liner 24. A downward pressure top plate 26 is fixed to the top of the downward pressure support rod 25. The downward pressure plate 20 is fixed on the downward pressure top plate 26. A lower heat insulation plate 27 can also be installed above the downward pressure top plate 26. The lower heating element 22 is set above the lower heat insulation plate 27, and the downward pressure plate 20 is fixed above the lower heating element 22.

[0065] The lower pressure fixing plate 23, lower pressure liner 24, lower pressure support rod 25 and lower pressure top plate 26 are used to cooperate to raise the height of the lower pressure plate 20, making the hot pressing process easier. The lower heat insulation plate 27 is used to prevent the lower heating element 22 from damaging the lower pressure top plate 26 and also to prevent heat loss.

[0066] The lower heating element 22 can be a heating tube capable of heat exchange, with a heat-conducting medium flowing inside. The number of lower heating elements 22 is not limited and can be selected based on the size of the lower pressure plate 20 and the heating speed.

[0067] like Figure 1 As shown, the upper hot pressing assembly 1 may include an upper pressure plate 10, an upper driving mechanism 11, and an upper heating element 12; the upper pressure plate 10 is fixed to the output end of the upper driving mechanism 11, and the upper driving mechanism 11 is used to drive the upper pressure plate 10 to move up and down to move away from or closer to the lower hot pressing assembly 2; the upper heating element 12 is disposed on the side of the upper pressure plate 10 opposite to the upper hot pressing assembly 1, and the upper heating element 12 is used to generate heat and transfer the heat to the upper pressure plate 10.

[0068] After both the lower pressure plate 20 and the flexible layer 30 rise, the upper drive mechanism 11 is activated, causing the upper drive mechanism 11 to drive the upper pressure plate 10 to descend until the upper pressure plate 10 is in contact with the bare battery cell 6 on the lower pressure plate 20. Then, the upper heating element 12 is activated, causing the upper heating element 12 to generate heat and conduct heat to the upper pressure plate 10, thereby realizing the hot pressing process of the bare battery cell 6.

[0069] The upper drive mechanism 11 can also be a lifting drive such as a lifting cylinder.

[0070] Furthermore, such as Figure 1 As shown, an upper pressure fixing plate 13 can be fixed to the output end of the upper drive mechanism 11. An upper pressure liner 14 is fixed below the upper pressure fixing plate 13. An upper pressure support rod 15 is fixed below the upper pressure liner 14. An upper pressure top plate 16 is fixed to the bottom end of the upper pressure support rod 15. An upper pressure plate 10 is fixed to the upper pressure top plate 16. An upper heat insulation plate 17 can also be installed below the upper pressure top plate 16. An upper heating element 12 is located below the upper heat insulation plate 17, and the upper pressure plate 10 is fixed below the upper heating element 12.

[0071] The upper pressure fixing plate 13, upper pressure liner 14, upper pressure support rod 15 and upper pressure top plate 16 are used to cooperate with each other to realize the connection between the upper drive mechanism 11 and the upper pressure plate 10. The upper heat insulation plate 17 is used to prevent the upper heating element 12 from damaging the upper pressure top plate 16 and also to prevent heat loss.

[0072] The upper heating element 12 can also be a heating tube capable of heat exchange, with a heat-conducting medium flowing inside. The number of upper heating elements 12 is not limited and can be selected based on the size of the upper pressure plate 10 and the heating speed.

[0073] After hot pressing is completed, the bare battery cell 6 can be unloaded by following the reverse steps of the transfer and placement process before hot pressing. For example, the upper pressure plate 10 is raised and the lower pressure plate 20 is lowered first. Then, the lifting component 311 is activated to lift the flexible layer 30 and the bare battery cell 6. Then, the translation component 7 and the lifting component 4 are activated to continue lifting the flexible layer 30 and the bare battery cell 6 until the flexible layer 30 continues to transform into a platform structure. Then, the clamping component 5 is activated to clamp the bare battery cell 6 at the top of the platform structure to the unloading position. This completes the unloading process after hot pressing.

[0074] like Figure 3 As shown, this embodiment also provides a battery lamination hot pressing method, which uses the above-mentioned battery lamination hot pressing equipment and includes: Step S1: Insert the output end of the lifting component 4 between the flexible layer 30 and the lower hot pressing component 2, and then raise the output end of the lifting component 4 so that the flexible layer 30 above the lower hot pressing component 2 is formed into a platform structure. Step S2: Use the clamping assembly 5 to clamp the stacked bare battery cell 6, and then move the clamping assembly 5 to the periphery of the platform structure and make the bare battery cell 6 clamped by the clamping assembly 5 abut against the top of the platform structure. Step S3: After the clamping component 5 releases the bare cell 6 and moves away from the platform structure, the output end of the lifting component 4 is lowered to drive the top of the platform structure and the bare cell 6 on it to fall down until the flexible layer 30 moves back to its original position. Step S4: Remove the output end of the lifting component 4 from between the flexible layer 30 and the lower hot pressing component 2, and then move the upper hot pressing component 1 and the lower hot pressing component 2 closer together to hot press the bare cell 6.

[0075] Step S1 is used to shape the flexible layer 30 into a platform structure, preparing for the subsequent transfer and loading of the bare battery cell 6; step S2 is used to transfer the stacked bare battery cell 6 to the top of the platform structure; step S3 is used to restore the flexible layer 30 to its original shape and keep the position of the bare battery cell 6 fixed; step S4 is used to realize the hot pressing process of the bare battery cell 6. Thus, by performing steps S1-S4 in sequence, the transfer, placement and hot pressing processes of the bare battery cell 6 can be realized sequentially.

[0076] Since the battery stacking hot pressing method provided in this embodiment uses the above-mentioned battery stacking hot pressing equipment, the battery stacking hot pressing method can also stably transfer the bare cell 6 onto the flexible layer 30 through the clamping component 5, and then use the flexible layer 30 and the lifting component 4 to stably transfer the bare cell 6 onto the lower hot pressing component 2. During the transfer process, the flexible layer 30 increases the friction of the bare cell 6 to prevent misalignment between its positive and negative electrode plates, thereby effectively ensuring the stability of the bare cell 6 during the transfer, placement and hot pressing process, and preventing misalignment between the positive and negative electrode plates from causing battery structure instability or failure.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery stacking hot pressing device, characterized in that, It includes an upper hot pressing assembly (1), a lower hot pressing assembly (2), a flexible support assembly (3), a lifting assembly (4), and a clamping assembly (5); The upper hot pressing assembly (1) and the lower hot pressing assembly (2) are arranged opposite each other and can move relative to each other; The flexible support component (3) includes a flexible layer (30) that extends between the upper hot-pressing component (1) and the lower hot-pressing component (2) and is spread out above the lower hot-pressing component (2). The output end of the lifting component (4) can extend between the flexible layer (30) and the lower hot pressing component (2). The output end of the lifting component (4) is used to lift and lower to drive the flexible layer (30) above it to lift and lower. The flexible layer (30) is used to form a platform structure when the output end of the lifting component (4) rises. The clamping assembly (5) is used to clamp the bare battery cell (6) after stacking, and the clamping assembly (5) can be moved to the periphery of the platform structure so that the bare battery cell (6) it clamps abuts against the top of the platform structure.

2. The battery stacking hot pressing equipment according to claim 1, characterized in that, The flexible support assembly (3) also includes a plurality of tensioning mechanisms (31) disposed around the lower hot pressing assembly (2). The plurality of tensioning mechanisms (31) are connected to the flexible layer (30) and apply tension to the flexible layer (30) to cause the flexible layer (30) to unfold.

3. The battery stacking hot pressing equipment according to claim 2, characterized in that, The flexible layer (30) is attached to the top of the lower hot-pressing assembly (2); The tensioning mechanism (31) includes a winding member (310) and a lifting member (311). The winding member (310) is connected to the flexible layer (30) and is used to wind up and unwind the flexible layer (30). The lifting member (311) is located below the flexible layer (30) between the winding member (310) and the lower hot pressing assembly (2), and the lifting member (311) can be raised and lowered to drive the flexible layer (30) above the lower hot pressing assembly (2) to rise and fall.

4. The battery stacking hot pressing equipment according to claim 3, characterized in that, The tensioning mechanism (31) further includes a tensioning member (312), which is disposed between the winding member (310) and the lifting member (311), and the tensioning member (312) is connected to the flexible layer (30). The tensioning member (312) can be raised and lowered to tighten or loosen the flexible layer (30).

5. The battery stacking hot pressing equipment according to any one of claims 1-4, characterized in that, It also includes a translation component (7), both the translation component (7) and the lifting component (4) are disposed on the periphery of the lower hot pressing component (2), and the lifting component (4) is installed at the output end of the translation component (7). The translation component (7) is used to drive the lifting component (4) to move so that the output end of the lifting component (4) moves between the flexible layer (30) and the lower hot pressing component (2).

6. The battery stacking hot pressing equipment according to claim 5, characterized in that, There are two lifting components (4), which are respectively disposed on both sides of the lower hot pressing component (2). Each lifting component (4) has a horizontally disposed lifting plate (40) fixed at its output end. The two lifting plates (40) are used to connect and be located on the same horizontal plane when the output ends of the two lifting components (4) extend between the flexible layer (30) and the lower hot pressing component (2).

7. The battery stacking hot pressing equipment according to any one of claims 1-4, characterized in that, The clamping assembly (5) includes a first clamp and a second clamp that are spaced apart. The first clamp is used to clamp the bare battery cell (6) at a position near one end of the cell, and the second clamp is used to clamp the bare battery cell (6) at a position near the other end of the cell. The first clamp and the second clamp can be located on both sides of the platform structure when the clamping assembly (5) moves to the periphery of the platform structure.

8. The battery stacking hot pressing equipment according to any one of claims 1-4, characterized in that, The lower hot pressing assembly (2) includes a lower pressure plate (20), a lower driving mechanism (21), and a lower heating element (22). The lower pressure plate (20) is fixed to the output end of the lower drive mechanism (21), which is used to drive the lower pressure plate (20) to move up and down to get closer to or away from the upper hot press assembly (1). The lower heating element (22) is disposed on the side of the lower pressure plate (20) opposite to the upper hot pressing assembly (1), and the lower heating element (22) is used to generate heat and transfer the heat to the lower pressure plate (20).

9. The battery stacking hot pressing equipment according to any one of claims 1-4, characterized in that, The upper hot press assembly (1) includes an upper pressure plate (10), an upper drive mechanism (11), and an upper heating element (12). The upper pressure plate (10) is fixed to the output end of the upper drive mechanism (11), which is used to drive the upper pressure plate (10) to move up and down to move away from or closer to the lower hot press assembly (2). The upper heating element (12) is disposed on the side of the upper pressure plate (10) opposite to the upper hot pressing assembly (1), and the upper heating element (12) is used to generate heat and transfer the heat to the upper pressure plate (10).

10. A method for hot-pressing battery laminations, using the battery lamination hot-pressing equipment as described in any one of claims 1-9, characterized in that, include: The output end of the lifting component (4) is inserted between the flexible layer (30) and the lower hot pressing component (2), and then the output end of the lifting component (4) is raised so that the flexible layer (30) above the lower hot pressing component (2) is formed into a platform structure. The bare battery cell (6) after stacking is clamped by the clamping assembly (5), and then the clamping assembly (5) is moved to the periphery of the platform structure and the bare battery cell (6) clamped by the clamping assembly (5) is brought into contact with the top of the platform structure. After the clamping component (5) releases the bare cell (6) and moves away from the platform structure, the output end of the lifting component (4) is lowered to drive the top of the platform structure and the bare cell (6) on it to fall down until the flexible layer (30) moves back to its original position. The output end of the lifting assembly (4) is removed from between the flexible layer (30) and the lower hot pressing assembly (2), and then the upper hot pressing assembly (1) and the lower hot pressing assembly (2) are moved relatively close to each other to hot press the bare cell (6).

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