Gantry type lithium battery cell hot pressing device

Abstract

The utility model provides a gantry type lithium battery cell hot-pressing device, including: base and heating assembly, the upper surface of base is respectively fixed connection lower pressure plate and fixed frame, fixed frame upper surface is fixed connection hydraulic cylinder, fixed frame outer side is fixed connection PLC assembly, and the telescopic rod of hydraulic cylinder is fixed connection upper pressure plate through bearing plate, fixed frame upper pressure plate through bearing plate. The surfaces of the upper pressing plate and the lower pressing plate are fixedly connected with heating assemblies, each heating assembly is composed of a heat insulation plate, supporting plates, electric heating wires and a heat conduction plate, the surfaces of the heat insulation plates are fixedly connected with the heat conduction plates, inner cavities of the heat insulation plates are symmetrically connected with the supporting plates, and the electric heating wires are fixedly connected into heating grooves formed in the heat insulation plates through the supporting plates. According to the lithium battery cell hot-pressing device, the hydraulic cylinder, the upper pressing plate, the lower pressing plate, the heating assembly and the shielding plate are matched, so that the lithium battery cell can be subjected to corresponding hot-pressing treatment in a relatively closed environment, the hot-pressing effect can be effectively enhanced, and the heat loss can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery cell manufacturing technology, specifically to a gantry-type lithium battery cell hot pressing device. Background Technology

[0002] With the popularization of clean energy equipment such as new energy vehicles, lithium batteries are being used more and more widely, and the demand for lithium batteries is also increasing. Lithium battery production includes steps such as electrode production, separator production, electrode winding, cell formation, and cell casing. Among them, before the cell is formed, it needs to be hot-pressed and shaped by a hot-pressing device to facilitate subsequent operations. Heating and pressure can also remove gas between the electrodes and other parts, making the separator and the positive and negative electrode materials more tightly connected, reducing contact resistance, reducing cell thickness, and improving cell performance and volumetric energy density.

[0003] A search revealed a prior art hot-pressing device for a soft-pack lithium battery (publication number: CN216084998U), which describes it as "including an upper hot-pressing mechanism, a lower hot-pressing mechanism, a drive mechanism, an upper electrode heating mechanism, and a lower electrode heating mechanism. The drive mechanism is mounted on the upper hot-pressing mechanism, which is located above the lower hot-pressing mechanism and is movably connected to it via the drive mechanism. The upper electrode heating mechanism is mounted on the upper hot-pressing mechanism, and the lower electrode heating mechanism is mounted on the lower hot-pressing mechanism, with the upper electrode heating mechanism corresponding to the lower electrode heating mechanism." This device is composed of a controller, a lifting cylinder, and guide columns. The drive mechanism controls the vertical movement of the upper hot press plate above the lower hot press plate to ensure the variability of the distance between the upper and lower hot press plates. This allows the device to hot press soft-pack lithium batteries of different thicknesses, expanding its applicability. However, during the hot pressing process, the four sides of the lithium battery are directly connected to the external environment. Therefore, changes in external temperature or airflow can affect the temperature of the lithium battery itself, making it prone to uneven heating during the hot pressing process. This reduces the hot pressing effect of the lithium battery and also increases the heat loss during the hot pressing process. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, a gantry-type lithium battery cell hot pressing device is provided to solve the problems mentioned in the background technology.

[0005] To achieve the above objectives, a gantry-type lithium battery cell hot pressing device is provided, comprising: a base and a heating assembly. A lower pressure plate and a fixed frame are fixedly connected to the upper surface of the base, and a hydraulic cylinder is fixedly connected to the upper surface of the fixed frame. A PLC assembly is fixedly connected to the outer side of the fixed frame, and the telescopic rod of the hydraulic cylinder is fixedly connected to an upper pressure plate through a bearing plate. The heating assembly is fixedly connected to the surfaces of both the upper and lower pressure plates. Simultaneously, symmetrically connected interlocking plates are connected to both sides of the upper pressure plate, and a shielding plate is fixedly connected to the upper pressure plate through interlocking plates and magnets. The heating assembly consists of a heat insulation plate, a support plate, a heating wire, and a heat conducting plate. The heat conducting plate is fixedly connected to the surface of the heat insulation plate, and the support plate is symmetrically connected to the inner cavity of the heat insulation plate. The heating wire is fixedly connected to a heating groove opened in the heat insulation plate through the support plate, and a temperature sensor is fixedly connected to the side of the heating groove.

[0006] Preferably, the heat insulation plate in the heating assembly has an overall concave structure, and multiple sets of support plates are fixedly connected in parallel and at equal intervals within the heating groove opened in the heat insulation plate. The multiple sets of support plates are all elongated strip structures, and the cross-section formed by the combination of the heat insulation plate and the support plates is E-shaped.

[0007] Preferably, the heat-conducting plate in the heating assembly has a square structure, the dimensions of the outer side of the heat-conducting plate and the heat insulation plate are matched, and multiple sets of positioning grooves are opened parallel and evenly spaced along the length direction on the side of the support plate near the heat-conducting plate. The heating wire is attached to the surface of the heat-conducting plate through the positioning grooves, and the heating wire is distributed in an arc shape in the heating groove. The support plate and the heating wire are combined together to form a grid structure.

[0008] Preferably, both the upper and lower pressure plates are square in shape, and their sizes are matched. The four sets of interlocking plates fixedly connected on both sides are semi-cylindrical in shape. At the same time, two sets of auxiliary plates are fixedly connected to both ends of the upper pressure plate through grooves, and both sets of auxiliary plates are rectangular in shape.

[0009] Preferably, the shielding plate has an overall U-shaped structure, the size of the inner cavity of the shielding plate is adapted to the size of the outer side of the upper pressure plate, and a fitting groove is opened at the position of the upper end of the inner side of the shielding plate relative to the position of the fitting plate. A magnet is fixedly connected to the position of the inner side of the shielding plate relative to the position of the auxiliary plate, and the end faces of both ends of the shielding plate are attached to the surface of the fixing frame.

[0010] Preferably, the fixed frame has a U-shaped structure, and two sets of main slide grooves are symmetrically opened on the inner side of the fixed frame. Both sets of main slide grooves are long strips, and the main sliders are connected to the positions of the upper pressure plate on both sides relative to the main slide grooves. Both sets of main sliders are rectangular, and the pressure plate fixedly connected to the upper surface of the upper pressure plate has a cross-shaped structure.

[0011] Preferably, the base has a square structure, and a buffer groove is opened on the upper surface of the base corresponding to the position of the shielding plate. The size of the buffer groove and the shielding plate are compatible. At the same time, four sets of reinforcing rods are fixedly connected to the four ends of the lower surface of the pressure plate, and the four sets of reinforcing rods are all cylindrical structures.

[0012] Compared with the prior art, the beneficial effects of this utility model are: through the cooperation of the shielding plate, magnet, interlocking plate, base, buffer groove, heating component, upper pressure plate and lower pressure plate, the lithium battery cell can be subjected to corresponding hot pressing treatment in a relatively closed environment, ensuring the stability of the hot pressing environment. This can not only help enhance the uniformity of heating of the lithium battery cell and improve the hot pressing effect, but also reduce heat loss, thereby reducing the energy consumption of the device during hot pressing treatment. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of an embodiment of the present utility model.

[0014] Figure 2 This is a side view of an embodiment of the present utility model.

[0015] Figure 3 This is a top view of an embodiment of the present utility model.

[0016] Figure 4 This is a top view of the heating assembly according to an embodiment of the present invention.

[0017] Figure 5 This is a schematic diagram of the heating component structure in an embodiment of the present invention.

[0018] In the diagram: 1. Base; 2. Buffer groove; 3. Lower pressure plate; 4. Heating component; 5. Main slide groove; 6. PLC component; 7. Fitting plate; 8. Main slider; 9. Reinforcing rod; 10. Pressure plate; 11. Fixing frame; 12. Hydraulic cylinder; 13. Baffle plate; 14. Upper pressure plate; 15. Magnet; 16. Heat insulation plate; 17. Support plate; 18. Heating wire; 19. Temperature sensor; 20. Heat conducting plate. Detailed Implementation

[0019] Reference Figures 1 to 5As shown, this utility model provides a gantry-type lithium battery cell hot pressing device, including: a base 1 and a heating component 4. The upper surface of the base 1 is fixedly connected to a lower pressure plate 3 and a fixing frame 11, respectively. The upper surface of the fixing frame 11 is fixedly connected to a hydraulic cylinder 12. The outer side of the fixing frame 11 is fixedly connected to a PLC component 6. The telescopic rod of the hydraulic cylinder 12 is fixedly connected to an upper pressure plate 14 through a pressure plate 10. The heating component 4 is fixedly connected to the surfaces of both the upper pressure plate 14 and the lower pressure plate 3. At the same time, the two sides of the upper pressure plate 14 are symmetrically connected to a fitting plate 7. The shielding plate 13 is fixedly connected to the upper pressure plate 14 through the fitting plate 7 and a magnet 15. The heating component 4 is composed of a heat insulation plate 16, a support plate 17, a heating wire 18 and a heat conducting plate 20. The surface of the heat insulation plate 16 is fixedly connected to the heat conducting plate 20. The inner cavity of the heat insulation plate 16 is symmetrically connected to the support plate 17. The heating wire 18 is fixedly connected to the heating groove opened in the heat insulation plate 16 through the support plate 17. At the same time, a temperature sensor 19 is fixedly connected to the side of the heating groove.

[0020] In this embodiment, the lithium battery cell to be processed is placed on the heating assembly 4 on the surface of the lower pressure plate 3. The electrically connected hydraulic cylinder 12 is activated by the PLC assembly 6. The extension rod of the hydraulic cylinder 12 pushes the upper pressure plate 14 downward through the pressure plate 10. The upper pressure plate 14 can drive the corresponding heating assembly 4 and the baffle plate 13 to move downward synchronously. The lower end of the baffle plate 13 can fit against the outer side of the lower pressure plate 3, so that the hot pressing area between the upper pressure plate 14 and the lower pressure plate 3 can form a relatively closed space. At this time, the heating wire 18 in the heating assembly 4 is activated by the PLC assembly 6. The heat generated by the energized heating wire 18 is evenly transferred to the hot pressing space through the support plate 17 and the heat conducting plate 20. The temperature sensor 19 built into the heating assembly 4 can transmit the corresponding temperature data to the electrically connected PLC assembly 6 in real time. The PLC component 6 facilitates real-time control of the heating wire 18's on / off state, ensuring the stability of the surface temperature of the heating component 4. The display module of the PLC component 6 can intuitively display the corresponding data. Then, when the temperature data reaches the preset range, the PLC component 6 restarts the hydraulic cylinder 12. The extension rod of the hydraulic cylinder 12 pushes the upper pressure plate 14 and its corresponding heating component 4 downward, so that the lithium battery cell can be heated evenly for the corresponding hot pressing treatment, enhancing the hot pressing effect of the lithium battery cell. Furthermore, the shielding plate 13 and the fixing frame 11 are both made of heat-insulating material, which helps to reduce the energy consumption of the device during hot pressing treatment. After the lithium battery cell hot pressing treatment is completed, the PLC component 6 controls the hydraulic cylinder 12 to reset. The hydraulic cylinder 12 will drive the upper pressure plate 14 and the shielding plate 13 to reset synchronously, and the processed lithium battery cell can be removed.

[0021] In a preferred embodiment, the heat insulation plate 16 in the heating assembly 4 has a concave structure, and multiple sets of support plates 17 are fixedly connected in parallel and at equal intervals in the heating groove opened in the heat insulation plate 16. The multiple sets of support plates 17 are all elongated structures, and the cross-section formed by the combination of the heat insulation plate 16 and the support plates 17 is E-shaped.

[0022] In this embodiment, as Figure 1 , Figure 4 and Figure 5 The support plate 17 is made of a thermally conductive material, which helps to enhance the uniformity of the surface temperature of the heating component 4. At the same time, the support plate 17 helps to enhance the overall structural strength of the heating component 4, thereby reducing the probability of the heating component 4 being accidentally damaged due to the compression of the lithium battery cell.

[0023] In a preferred embodiment, the heat-conducting plate 20 in the heating assembly 4 has a square structure. The dimensions of the outer side of the heat-conducting plate 20 and the heat insulation plate 16 are matched. The support plate 17 has multiple sets of positioning grooves that are parallel and evenly spaced along the length direction on the side close to the heat-conducting plate 20. The heating wire 18 is attached to the surface of the heat-conducting plate 20 through the positioning grooves. At the same time, the heating wire 18 is distributed in an arc shape in the heating groove. The support plate 17 and the heating wire 18 are combined together to form a grid-shaped structure.

[0024] In this embodiment, as Figure 1 , Figure 4 and Figure 5 The positioning grooves provided in the support plate 17 can help enhance the stability of the heating wire 18 during its placement, ensuring that the heating wire 18 can be evenly distributed on the surface of the heat-conducting plate 20, thereby further enhancing the uniformity of the surface temperature of the heat-conducting plate 20 and improving the heating effect of the heating assembly 4.

[0025] In a preferred embodiment, both the upper pressure plate 14 and the lower pressure plate 3 are square in shape, and the sizes of the upper pressure plate 14 and the lower pressure plate 3 are matched. The four sets of interlocking plates 7 fixedly connected on both sides are semi-cylindrical in shape. At the same time, the two ends of the upper pressure plate 14 are fixedly connected to two sets of auxiliary plates through grooves, and the two sets of auxiliary plates are rectangular in shape.

[0026] In this embodiment, as Figure 1 , Figure 2 and Figure 3 The upper pressure plate 14 and the lower pressure plate 3 are matched in size, which helps to enhance the fit between the lower end of the shield 13 and the lower pressure plate 3. Meanwhile, the auxiliary plate is made of stainless steel, and the setting of the fitting plate 7 can help to enhance the convenience and stability of the shield 13 during installation and removal.

[0027] As a preferred embodiment, the shielding plate 13 has an overall U-shaped structure. The size of the inner cavity of the shielding plate 13 is adapted to the size of the outer side of the upper pressure plate 14. A fitting groove is opened at the position of the upper end of the inner side of the shielding plate 13 relative to the position of the fitting plate 7. The magnet 15 is fixedly connected to the position of the inner side of the shielding plate 13 relative to the auxiliary plate. At the same time, the end faces of both ends of the shielding plate 13 are attached to the surface of the fixing frame 11.

[0028] In this embodiment, as Figure 1 , Figure 2 and Figure 3 The magnet 15 allows for easy installation and removal of the shield 13 and the upper pressure plate 14. Therefore, the shield 13 can be flexibly replaced according to the size of the lithium battery cell to be hot-pressed, thereby ensuring that the device can provide a good hot-pressing environment and hot-pressing effect for the lithium battery cell.

[0029] As a preferred embodiment, the fixed frame 11 has a U-shaped structure, and two sets of main slide grooves 5 are symmetrically opened on the inner side of the fixed frame 11. Both sets of main slide grooves 5 have a long strip structure, and the positions of the upper pressure plate 14 on both sides relative to the main slide grooves 5 are connected to the main sliders 8. Both sets of main sliders 8 have a rectangular structure, and the pressure plate 10 fixedly connected to the upper surface of the upper pressure plate 14 has a cross-shaped structure.

[0030] In this embodiment, as Figure 1 , Figure 2 and Figure 3 The main slider 8 and the main slide groove 5 are matched in size, which can help enhance the stability of the upper pressure plate 14 when it moves, thereby ensuring the stability of the lithium battery cell under force. At the same time, the setting of the pressure plate 10 can help enhance the uniformity of the force at each position when the upper pressure plate 14 moves down, and reduce the probability of the upper pressure plate 14 being accidentally deformed and damaged due to a single force point.

[0031] As a preferred embodiment, the base 1 has a square structure. A buffer groove 2 is opened on the upper surface of the base 1 relative to the position of the baffle plate 13. The size of the buffer groove 2 and the baffle plate 13 are compatible. At the same time, four sets of reinforcing rods 9 are fixedly connected to the four ends of the lower surface of the pressure plate 10, and the four sets of reinforcing rods 9 are all cylindrical structures.

[0032] In this embodiment, as Figure 1 , Figure 2 and Figure 3 The opening of the buffer groove 2 can help increase the movement range of the baffle plate 13, thereby helping to improve the practicality and flexibility of the hot pressing device. At the same time, the setting of the reinforcing rod 9 can help reduce the probability of the pressure plate 10 being deformed unexpectedly, ensuring the hot pressing effect of the device on the lithium battery cell.

[0033] The gantry-type lithium battery cell hot pressing device of this utility model, through the cooperation of hydraulic cylinder 12, upper pressure plate 14, lower pressure plate 3, heating component 4 and shielding plate 13, enables the lithium battery cell to undergo corresponding hot pressing treatment in a relatively closed environment, thereby effectively enhancing the hot pressing effect and reducing heat loss. At the same time, PLC component 6 and temperature sensor 19 are both common brand models on the market.

Claims

1. A gantry-type lithium battery cell hot press apparatus, comprising: The base (1) and the heating assembly (4) are characterized in that: the lower pressing plate (3) and the fixed frame (11) are fixedly connected to the upper surface of the base (1) respectively, the upper surface of the fixed frame (11) is fixedly connected with the hydraulic cylinder (12), the outer side of the fixed frame (11) is fixedly connected with the PLC assembly (6), the telescopic rod of the hydraulic cylinder (12) is fixedly connected with the upper pressing plate (14) through the pressure bearing plate (10), the surfaces of the upper pressing plate (14) and the lower pressing plate (3) are fixedly connected with the heating assembly (4), at the same time, the two sides of the upper pressing plate (14) are symmetrically connected with the embedded plate (7), the shielding plate (13) is fixedly connected with the upper pressing plate (14) through the embedded plate (7) and the magnet (15), the heating assembly (4) is composed of the heat insulation plate (16), the support plate (17), the electric heating wire (18) and the heat conduction plate (20), the surface of the heat insulation plate (16) is fixedly connected with the heat conduction plate (20), the inner cavity of the heat insulation plate (16) is symmetrically connected with the support plate (17), and the electric heating wire (18) is fixedly connected in the heating groove of the heat insulation plate (16) through the support plate (17), and at the same time, the side of the heating groove is fixedly connected with the temperature sensor (19).

2. The gantry type lithium battery cell hot press device according to claim 1, characterized in that, The heat insulation plate (16) in the heating assembly (4) is in a concave structure as a whole, a plurality of groups of support plates (17) are fixedly connected in parallel and at equal intervals in the heating groove of the heat insulation plate (16), and the plurality of groups of support plates (17) are in a long strip structure, and the cross section formed by the combination of the heat insulation plate (16) and the support plate (17) is in an E-shaped structure.

3. The gantry type lithium battery cell hot press device according to claim 1, characterized in that, The heat conduction plate (20) in the heating assembly (4) is in a square structure, the sizes of the outer sides of the heat conduction plate (20) and the heat insulation plate (16) are matched, a plurality of groups of positioning grooves are formed in parallel and at equal intervals in the length direction on one side of the support plate (17) close to the heat conduction plate (20), the electric heating wire (18) is attached to the surface of the heat conduction plate (20) through the positioning grooves, the electric heating wire (18) is in an arch shape in the heating groove, and the support plate (17) and the electric heating wire (18) are combined to form a cross structure.

4. The gantry type lithium battery cell hot press device according to claim 1, characterized in that, The upper pressing plate (14) and the lower pressing plate (3) are in a square structure, the sizes of the upper pressing plate (14) and the lower pressing plate (3) are matched, and the four groups of embedded plates (7) fixedly connected to the two sides are in a semicylindrical structure, and the two ends of the upper pressing plate (14) are fixedly connected with two groups of auxiliary plates through grooves, and the two groups of auxiliary plates are in a rectangular structure.

5. The gantry type lithium battery cell hot press device according to claim 1, characterized in that, The shielding plate (13) is in a overall structure, the size of the inner cavity of the shielding plate (13) is matched with the size of the outer side of the upper pressing plate (14), a fitting groove is formed in the inner side of the shielding plate (13) at a position corresponding to the position of the embedded plate (7), a magnet (15) is fixedly connected to the inner side of the shielding plate (13) at a position corresponding to the auxiliary plate, and the end faces of the two ends of the shielding plate (13) are attached to the surface of the fixed frame (11).

6. The gantry type lithium battery cell hot press device according to claim 1, characterized in that, The fixed frame (11) is in the structure of a Chinese character, two groups of main sliding grooves (5) are symmetrically arranged on the inner side of the fixed frame (11), the two groups of main sliding grooves (5) are in strip-shaped structures, the positions corresponding to the main sliding grooves (5) on the two sides of the upper pressing plate (14) are connected with main sliding blocks (8), the two groups of main sliding blocks (8) are in rectangular structures, and the pressure bearing plate (10) fixedly connected to the upper surface of the upper pressing plate (14) is in a cross-shaped structure.

7. The gantry type lithium battery cell hot press apparatus according to claim 1, characterized in that, The base (1) is in a square structure, the buffer groove (2) is arranged on the upper surface of the base (1) in a position corresponding to the shielding plate (13), the buffer groove (2) and the shielding plate (13) are in size adaptation, four groups of reinforcing rods (9) are fixedly connected to the four ends of the lower surface of the pressure bearing plate (10), and the four groups of reinforcing rods (9) are in cylindrical structures.

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