Hot pressing assembly

Abstract

The utility model discloses a hot pressing assembly which comprises a first plate and an anti-sticking coating, a plurality of gas storage grooves arranged at intervals are formed in the first plate, and openings are formed in the gas storage grooves. And the anti-sticking coating is coated on one side, provided with the air storage groove, of the first plate. In the process that the first plate extrudes the core package, the gas storage groove can contain a certain amount of gas, and the situation that after the first plate and the core package are completely attached, separation is difficult due to the vacuum effect is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a hot-pressing assembly. Background Technology

[0002] In battery manufacturing, to ensure a tight fit between the battery electrodes and a good lithium-ion transport channel, battery cells (such as wound or stacked cells) typically require a shaping process. This process aims to apply specific temperature and pressure to ensure a tight bond between the electrodes and the separator, forming a battery cell pack that meets charge and discharge requirements. Typically, a smooth steel plate is used to clamp the cell pack during the shaping process, and specific process conditions (temperature, force, and time) ensure the structural stability and normal function of the battery cell.

[0003] However, in actual production, the core package often adheres to the surface of the steel plate. This adhesion can affect production efficiency. Utility Model Content

[0004] One objective of this invention is to provide a hot-pressing assembly that addresses the technical problem of core packing sticking to the surface of a steel plate and being difficult to separate during the production process.

[0005] To achieve the above objectives, the present invention provides a solution as follows: a hot-pressing assembly, characterized in that it comprises: a first plate having a plurality of spaced-apart air storage grooves, the air storage grooves having openings;

[0006] An anti-stick coating is applied to the side of the first plate where the air storage groove is located.

[0007] Optionally, the first plate includes a first base, a plurality of first protrusions and a plurality of second protrusions. The plurality of first protrusions are spaced apart on the first base along a first direction, and the plurality of second protrusions are spaced apart on the first base along a second direction. The first protrusions and the second protrusions intersect each other, and the plurality of first protrusions, the plurality of second protrusions and the first base together enclose to form a plurality of spaced gas storage grooves. The first direction and the second direction are angled together.

[0008] Optionally, a plurality of first protrusions are arranged in parallel, with the distance between adjacent first protrusions being L1, 0.1mm≤L1≤5mm; and / or, a plurality of second protrusions are arranged in parallel, with the distance between adjacent second protrusions being L2, 0.1mm≤L2≤5mm.

[0009] Optionally, the distance between the side of the first protrusion away from the first substrate and the first substrate is H1, 0.1mm≤H1≤1mm; and / or the distance between the side of the second protrusion away from the first substrate and the first substrate is H2, 0.1mm≤H2≤1mm.

[0010] Optionally, the first protrusion has an arc-shaped cross-section along the thickness direction of the first plate; and / or, the second protrusion has an arc-shaped cross-section along the thickness direction of the first plate.

[0011] Optionally, the hot-press assembly includes a second plate, and the first and second plates are detachably connected.

[0012] Optionally, the first plate includes a first connecting portion, which protrudes from the first base.

[0013] The second plate includes a second base and a second connecting part. The second base is disposed on the side of the first base away from the air storage groove, and the second connecting part protrudes from the second base.

[0014] The first substrate and the second substrate are connected by a first connecting part and a second connecting part.

[0015] Optionally, the first plate has a groove along its extension direction, and the second plate includes a slider, with the slider and the groove slidingly engaged.

[0016] Alternatively, the second plate may have a groove along its extension direction, and the first plate may include a slider, with the slider and the groove slidingly engaged.

[0017] Optionally, the groove extends through one end of the first plate, or the groove extends through one end of the second plate.

[0018] Optionally, the slider includes a first part and a second part that are connected to each other. The first part is connected to a first plate or to a second plate. The width of the second part is greater than that of the first part. The slide groove includes a first groove and a second groove that are connected to each other. The width of the second groove is greater than that of the first groove. The first part and the first groove are in sliding engagement, and the second part and the second groove are in sliding engagement.

[0019] The beneficial effects of this utility model are as follows: the hot-pressing assembly includes a first plate and an anti-stick coating. The first plate has a plurality of spaced-apart air-retaining grooves, and the air-retaining grooves have openings. The anti-stick coating is applied to the side of the first plate where the air-retaining grooves are located.

[0020] In practical applications, the two first plates of this hot press are arranged side-by-side, with their anti-stick coatings facing each other. During the core package shaping operation, the two first plates move towards each other, generating extrusion force to ensure that the electrode sheets of the core package are tightly adhered to the diaphragm. The anti-stick coating has a long service life, reducing the need for frequent replacements and thus significantly improving production efficiency.

[0021] In addition, during the first platen extrusion of the core package, the gas storage groove can hold a certain amount of gas, which avoids the difficulty of separation caused by the vacuum effect after the first platen and the core package are completely bonded, thus improving the durability and production efficiency of the equipment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the hot-pressing assembly provided in this embodiment of the utility model;

[0024] Figure 2 This is a structural schematic diagram provided by an embodiment of the present invention to illustrate the first protrusion and the second protrusion;

[0025] Figure 3 This is a structural schematic diagram of a slide and a slider provided in an embodiment of the present invention;

[0026] Figure 4 This is provided by the embodiment of the present utility model. Figure 3 A magnified view of a portion of region A in the middle.

[0027] Explanation of icon numbers:

[0028] 20. First plate; 21. Air storage groove; 22. Opening; 23. First base; 24. First protrusion; 25. Second protrusion; 26. First connecting part; 27. Slide groove; 271. First groove; 272. Second groove; 30. Second plate; 31. Second base; 32. Second connecting part; 33. Slider; 331. First part; 332. Second part; 41. First direction; 42. Second direction. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the overall structure of the hot-pressing assembly provided in this embodiment of the utility model. Figure 2 This is a structural schematic diagram provided by an embodiment of the present invention to illustrate the first protrusion 24 and the second protrusion 25.

[0031] This utility model provides a hot-pressing assembly, including a first plate 20 and an anti-stick coating. The first plate 20 has a plurality of spaced-apart air-retaining grooves 21, each air-retaining groove 21 having an opening 22. The anti-stick coating is applied to the side of the first plate 20 where the air-retaining grooves 21 are located.

[0032] In practical applications, the two first plates 20 of the hot press are arranged side by side, with their anti-stick coatings facing each other. During the core package shaping operation, the two first plates 20 move towards each other, generating extrusion force to ensure that the electrode sheets of the core package are tightly bonded to the diaphragm. The anti-stick coating has a long service life, reducing the need for frequent replacements and thus significantly improving production efficiency.

[0033] In addition, during the extrusion of the core package by the first plate 20, the gas storage groove 21 can hold a certain amount of gas, which avoids the difficulty of separation caused by the vacuum effect after the first plate 20 and the core package are completely bonded, thus improving the durability and production efficiency of the equipment.

[0034] In this embodiment, the gas storage groove 21 is quadrilateral in shape. In other embodiments, the gas storage groove 21 may also be triangular, pentagonal or other polygonal, or circular, elliptical or fan-shaped or other shapes.

[0035] In one embodiment, see Figure 2 The first plate 20 includes a first base 23, a plurality of first protrusions 24 and a plurality of second protrusions 25. The plurality of first protrusions 24 are spaced apart on the first base 23 along a first direction 41, and the plurality of second protrusions 25 are spaced apart on the first base 23 along a second direction 42. The first protrusions 24 and the second protrusions 25 intersect each other. The plurality of first protrusions 24, the plurality of second protrusions 25 and the first base 23 together enclose a plurality of spaced air storage grooves 21. The first direction 41 and the second direction 42 are angled together.

[0036] In practical applications, the first protrusion 24 and the second protrusion 25 are arranged intersecting in different directions, so that the gas storage grooves 21 form a uniformly distributed network structure on the surface of the first plate 20. This design can more effectively contain and release gas, avoiding the gas from concentrating in a certain area during the extrusion process, thereby reducing the problem of gas accumulation during the core pack forming process.

[0037] Furthermore, the first protrusion 24 and the second protrusion 25 are arranged in a cross pattern to jointly support the first base 23, thereby improving the overall rigidity and mechanical strength of the first plate 20. This allows it to withstand greater pressure during the extrusion process without easily deforming, thus improving the durability and reliability of the hot-pressing assembly.

[0038] In this embodiment, the angle between the first protrusion 24 and the second protrusion 25 is 90°, making the air storage groove 21 rectangular. In other embodiments, the angle between the first protrusion 24 and the second protrusion 25 can also be other shapes, making the shape of the air storage groove 21 rhomboid.

[0039] In one embodiment, see Figure 2 Multiple first protrusions 24 are arranged side by side, with the distance between adjacent first protrusions 24 being L1, 0.1mm≤L1≤5mm; and / or, multiple second protrusions 25 are arranged side by side, with the distance between adjacent second protrusions 25 being L2, 0.1mm≤L2≤5mm.

[0040] In practical applications, a smaller spacing ensures that the protrusions provide more uniform support to the core package surface during the core package shaping process, thereby enabling the core package electrodes and separators to fit more tightly and evenly after extrusion, reducing deformation or wrinkles caused by uneven stress after shaping.

[0041] Furthermore, the appropriate spacing between the first protrusion 24 and the second protrusion 25 ensures the overall stability of the first plate 20. When the spacing is smaller, the distribution density of the first protrusion 24 and the second protrusion 25 is high, which can effectively disperse the extrusion pressure during shaping, reduce local deformation or stress concentration of the core package, and improve the shaping effect of the core package.

[0042] In one embodiment, see Figure 4 The distance between the side of the first protrusion 24 away from the first base 23 and the first base 23 is H1, 0.1mm≤H1≤1mm; and / or the distance between the side of the second protrusion 25 away from the first base 23 and the first base 23 is H2, 0.1mm≤H2≤1mm.

[0043] In practical applications, the height of the protrusion is moderate, which avoids excessive local pressure on the core package surface caused by an excessively high protrusion, reduces the problem of core package damage caused by indentation, and maintains the uniformity and integrity of the shaping effect.

[0044] In this embodiment, the first protrusion 24 and the second protrusion 25 have the same height.

[0045] In one embodiment, see Figure 4 The first protrusion 24 has an arc-shaped cross-section along the thickness direction of the first plate 20; and / or, the second protrusion 25 has an arc-shaped cross-section along the thickness direction of the first plate 20.

[0046] In practical applications, designing the cross-section of the first protrusion 24 and / or the second protrusion 25 as an arc shape can effectively disperse the pressure at the contact point between the protrusion and the core package during the forming process, reduce indentations and damage on the core package surface, and optimize the mechanical properties of the hot press plate. The arc design can also alleviate stress concentration and extend the service life of the hot press assembly.

[0047] In this embodiment, the first protrusion 24 and the second protrusion 25 both have arc-shaped cross sections along the thickness direction of the first plate 20.

[0048] In one embodiment, reference is made to Figure 3 The hot-pressing assembly includes a second plate 30, and the first plate 20 and the second plate 30 are detachably connected.

[0049] In practical applications, when the anti-stick coating or other parts of the hot-pressing assembly show wear or require cleaning, the first plate 20 and the second plate 30 can be easily disassembled for replacement or maintenance, thereby extending the service life of the equipment. Simultaneously, the detachable connection provides quick-change hot-pressing plates for core pack shaping needs of different specifications or models, significantly improving the adaptability and efficiency of the hot-pressing assembly.

[0050] Optionally, refer to Figure 3 The first plate 20 includes a first connecting portion 26, which protrudes from the first base 23. The second plate 30 includes a second base 31 and a second connecting portion 32. The second base 31 is disposed on the side of the first base 23 away from the air storage groove 21. The second connecting portion 32 protrudes from the second base 31. The first base 23 and the second base 31 are connected by the first connecting portion 26 and the second connecting portion 32.

[0051] In practical applications, the protruding design of the first connecting part 26 and the second connecting part 32 provides sufficient space for the bolts, avoiding interference at the connection point of the two hot-pressing components that are positioned opposite each other during shaping.

[0052] In this embodiment, the first connecting part 26 and the second connecting part 32 are connected by bolts. In other embodiments, the first connecting part 26 and the second connecting part 32 can be connected by pins, with the pins passing through the first connecting part 26 and the second connecting part 32 to connect the first plate 20 and the second plate 30.

[0053] Optionally, refer to Figure 3 and Figure 4 The first plate 20 has a groove 27 along its extension direction, and the second plate 30 includes a slider 33, which slides in conjunction with the groove 27. Alternatively, the second plate 30 has a groove 27 along its extension direction, and the first plate 20 includes a slider 33, which slides in conjunction with the groove 27.

[0054] In practical applications, the following example illustrates the use of a first plate 20 with a groove 27 and a slider 33 mounted on a second plate 30. The first plate 20 has the groove 27 extending along its direction, and the second plate 30 has a slider 33 that slides within the groove 27. During assembly, the slider 33 can be inserted into the groove 27 to achieve initial positioning of the first plate 20 and the second plate 30. This allows assemblers to more easily and accurately align the first plate 20 and the second plate 30, ensuring efficient and precise assembly. After initial positioning, the first plate 20 and the second plate 30 can be fixed in other ways to ensure their stability and robustness during use. This design not only improves assembly efficiency but also reduces errors, enhancing the reliability of the entire hot-press assembly.

[0055] Furthermore, the groove 27 extends through one end of the first plate 20, or the groove 27 extends through one end of the second plate 30.

[0056] In practical applications, the example of the groove 27 penetrating one end of the first plate 20 is used for illustration. The design of the groove 27 not penetrating one end of the first plate 20 or the second plate 30 primarily serves a limiting and positioning function. The closed end of the groove 27 restricts the movement range of the slider 33, thereby precisely controlling the relative position of the first plate 20 and the second plate 30 during assembly. This structure ensures that the two plates can be correctly mated and positioned, avoiding errors and unnecessary movement during assembly, thus improving assembly accuracy and efficiency. Furthermore, the unpenetrated end of the groove 27 also helps prevent the slider 33 from falling off, ensuring the fixation and stability of the first plate 20 and the second plate 30 during use, thereby improving the reliability of the hot-press assembly.

[0057] Optionally, refer to Figure 4 The slider 33 includes a first part 331 and a second part 332 that are connected to each other. The first part 331 is connected to the first plate 20 or to the second plate 30. The width of the second part 332 is greater than that of the first part 331. The slide groove 27 includes a first groove 271 and a second groove 272 that are connected to each other. The width of the second groove 272 is greater than that of the first groove 271. The first part 331 and the first groove 271 are in sliding engagement, and the second part 332 and the second groove 272 are in sliding engagement.

[0058] In practical applications, the design of the second part 332 being wider than the first part 331 effectively limits the relative movement of the first plate 20 and the second plate 30 along the thickness direction through the width difference, preventing excessive displacement or misalignment during assembly and thus ensuring their stable positioning in the thickness direction. Furthermore, this design eliminates the need for workers to precisely maintain the relative positions of the first plate 20 and the second plate 30 in the thickness direction, simplifying the assembly process and improving assembly efficiency. It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this embodiment are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0059] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0060] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0061] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A hot-pressing assembly, characterized in that, include: The first plate has multiple spaced gas storage slots, and the gas storage slots have openings. An anti-stick coating is applied to the side of the first plate where the air storage groove is located.

2. The hot-pressing assembly according to claim 1, characterized in that, The first plate includes a first base, a plurality of first protrusions and a plurality of second protrusions. The plurality of first protrusions are spaced apart on the first base along a first direction, and the plurality of second protrusions are spaced apart on the first base along a second direction. The first protrusions and the second protrusions intersect each other. The plurality of first protrusions, the plurality of second protrusions and the first base together enclose and form a plurality of spaced-apart air storage grooves. The first direction and the second direction are angled together.

3. The hot-pressing assembly according to claim 2, characterized in that, Multiple first protrusions are arranged side by side, with a spacing of L1 between adjacent first protrusions, where 0.1mm≤L1≤5mm; and / or, multiple second protrusions are arranged side by side, with a spacing of L2 between adjacent second protrusions, where 0.1mm≤L2≤5mm.

4. The hot-pressing assembly according to claim 2, characterized in that, The distance between the side of the first protrusion away from the first substrate and the first substrate is H1, 0.1mm≤H1≤1mm; and / or the distance between the side of the second protrusion away from the first substrate and the first substrate is H2, 0.1mm≤H2≤1mm.

5. The hot-pressing assembly according to claim 2, characterized in that, The first protrusion has an arc-shaped cross-section along the thickness direction of the first plate; and / or, the second protrusion has an arc-shaped cross-section along the thickness direction of the first plate.

6. The hot-pressing assembly according to any one of claims 2 to 5, characterized in that, The hot-pressing assembly includes a second plate, and the first plate and the second plate are detachably connected.

7. The hot-pressing assembly according to claim 6, characterized in that, The first plate includes a first connecting portion, which protrudes from the first base. The second plate includes a second base and a second connecting portion. The second base is disposed on the side of the first base away from the air storage groove, and the second connecting portion protrudes from the second base. The first substrate and the second substrate are connected by the first connecting portion and the second connecting portion.

8. The hot-pressing assembly according to claim 6, characterized in that, The first plate has a groove along its extending direction, and the second plate includes a slider, the slider and the groove being slidably engaged. Alternatively, the second plate may have a groove along its extension direction, and the first plate may include a slider, the slider and the groove being slidably engaged.

9. The hot-pressing assembly according to claim 8, characterized in that, The groove passes through one end of the first plate, or the groove passes through one end of the second plate.

10. The hot-pressing assembly according to claim 8, characterized in that, The slider includes a first part and a second part that are connected to each other. The first part is connected to the first plate or to the second plate. The width of the second part is greater than that of the first part. The slide groove includes a first groove and a second groove that are connected to each other. The width of the second groove is greater than that of the first groove. The first part and the first groove are in sliding engagement, and the second part and the second groove are in sliding engagement.

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