Hot pressing device for cover plate assembly

Abstract

The utility model relates to the technical field of batteries, and discloses a hot pressing device for a cover plate assembly. The hot pressing device for the cover plate assembly comprises a bottom plate and longitudinal supporting plates installed at the two ends of the bottom plate, a top plate is connected between the top ends of the two longitudinal supporting plates, and an upper heating body and an upper sealing head are installed below the top plate in a vertically movable mode; a lower heating body and a lower sealing head are mounted on the upper end surface of the bottom plate; a Z-axis linear module is arranged on the outer side face of the longitudinal supporting plate, the movable end of the Z-axis linear module is connected with a jig, and a positioning hole used for bearing a cover plate assembly is formed in the jig. Wherein the jig is positioned between the upper sealing head and the lower sealing head; and the bottom surface of the upper sealing head and the top surface of the lower sealing head are respectively provided with an avoiding position matched with the jig. The hot-pressed cover plate assembly is separated from the lower sealing head through the Z-axis linear module, so that secondary heating of the cover plate assembly on the heating table is avoided, and the yield of the hot-pressed cover plate assembly is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a hot pressing device for cover plate assemblies. Background Technology

[0002] Battery cover assemblies typically consist of end caps, separators, and terminals. The terminals are welded to the cell tabs to ensure the normal flow of charging and discharging current. The end caps are laser-welded to the battery casing to enclose and fix the bare cells and achieve a sealing effect, ensuring a stable internal environment for the battery. Therefore, the cover assembly plays a crucial role in battery applications.

[0003] In existing technologies, battery cover assemblies are mostly sealed and fixed using riveting, that is, by compressing the sealing ring and then riveting the terminal post to the end cover. However, there is a certain probability of incomplete riveting during the riveting process, leading to the risk of electrolyte leakage. With the development of the new energy industry, higher requirements are placed on the energy density, cycle life, safety, and reliability of batteries. Our company has developed a cover assembly that uses an insulating sealant layer to insulate and seal the terminal post and end cover, solving the problem of insufficient sealing stability in traditional riveting structures. In other words, during the encapsulation process, the top and bottom ends of the cover assembly are heated simultaneously using a hot pressing device, allowing the insulating sealant layer to effectively and stably seal and fix the end cover, terminal post, and separator. During the hot pressing process, the cover plate assembly is usually removed from the heating table of the hot pressing device by manual labor or robotic arms. If the cover plate assembly cannot be removed from the heating table in time after hot pressing or falls during the removal process, the cover plate assembly will be heated again on the heating table, which will reduce the yield of the cover plate assembly.

[0004] Therefore, there is an urgent need for a hot pressing device for cover plate assemblies to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a hot pressing device for cover plate assemblies, so as to solve the problem that when the cover plate assembly cannot be removed from the heating table in time after the hot pressing and sealing operation, or when it falls during the removal and placement process, the cover plate assembly will be reheated on the heating table, resulting in a low yield of the cover plate assembly.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This utility model provides a hot pressing device for a cover plate assembly, including a base plate and longitudinal support plates installed at both ends of the base plate. A top plate is connected between the top ends of the two longitudinal support plates. An upper heating element is installed below the top plate and can move up and down. An upper end cap is connected to the bottom of the upper heating element. A lower heating element is installed on the upper surface of the base plate and a lower end cap is connected to the top end of the lower heating element.

[0008] The outer side of the longitudinal support plate is equipped with a Z-axis linear module, and the moving end of the Z-axis linear module is connected to a fixture. The fixture is provided with positioning holes for supporting the cover plate assembly.

[0009] The fixture is located between the upper end cap and the lower end cap; the bottom surface of the upper end cap and the top surface of the lower end cap are respectively provided with clearance positions that match the fixture.

[0010] As an optional technical solution for a hot pressing device for a cover plate assembly, a pressing cylinder is installed on the top surface of the top plate, and the telescopic end of the pressing cylinder passes through the top plate and is connected to the upper heating body.

[0011] As an optional technical solution for a hot pressing device for a cover plate assembly, the top surface of the upper heating body is connected to a drive plate, and the top surface of the drive plate is mirror-arranged with two shoulders, and a retaining ring is provided in the two shoulders. The telescopic end of the lower pressing cylinder is connected to the retaining ring.

[0012] As an optional technical solution for a hot pressing device for a cover plate assembly, a longitudinal slide rail is installed on the inner side of the longitudinal support plate, a matching first slider is slidably mounted on the longitudinal slide rail, a first bracket is connected to the first slider, and the drive plate is mounted on the first bracket.

[0013] As an optional technical solution for a hot pressing device for a cover plate assembly, the Z-axis linear module includes a drive motor mounted on the top plate, the rotation shaft of the drive motor passing through the top plate and connected to a coupling; a longitudinal lead screw is rotatably mounted on the outer side of the longitudinal support plate facing away from the longitudinal slide rail, the top end of the longitudinal lead screw is connected to the other end of the coupling away from the drive motor, a thread rolling bearing is rotatably mounted on the longitudinal lead screw, and the fixture is connected to the thread rolling bearing.

[0014] As an optional technical solution for a hot pressing device for a cover plate assembly, a matching second slider is provided on the longitudinal slide rail, a second bracket is connected to the second slider, one end of the second bracket is connected to the thread rolling bearing, and the fixture is horizontally mounted on the second bracket.

[0015] As an optional technical solution for a hot pressing device for a cover plate assembly, the longitudinal support plate is equipped with two adjustable limit sensors on one side of the longitudinal lead screw, and the second bracket is connected to one end of the thread rolling bearing and equipped with a limit sensing plate.

[0016] As an optional technical solution for a hot pressing device for a cover plate assembly, a plurality of heat insulation columns are connected between the drive plate and the upper heating element, and a plurality of heat insulation columns are connected between the lower heating element and the base plate.

[0017] As an optional technical solution for a hot pressing device for cover plate assembly, each of the heat insulation columns is provided with multiple vertically staggered heat dissipation grooves.

[0018] As an optional technical solution for a hot pressing device for a cover plate assembly, the positioning hole has multiple positioning steps on its circumference, and the positioning hole is circular or rectangular.

[0019] The beneficial effects of this utility model are as follows:

[0020] This utility model provides a hot pressing device for a cover plate assembly, comprising a base plate and longitudinal support plates installed at both ends of the base plate. A top plate is connected between the top ends of the two longitudinal support plates. An upper heating element is installed below the top plate and can move up and down. An upper end cap is connected to the bottom of the upper heating element. A lower heating element is installed on the upper end face of the base plate, and a lower end cap is connected to the top of the lower heating element. A Z-axis linear module is installed on the outer side of the longitudinal support plates. A fixture is connected to the moving end of the Z-axis linear module. The fixture has positioning holes for supporting the cover plate assembly. The fixture is located between the upper end cap and the lower end cap. Clearances matching the fixture are respectively opened on the bottom surface of the upper end cap and the top surface of the lower end cap.

[0021] In the above structure, the cover plate assembly to be hot-pressed is placed in the positioning hole of the fixture by manual labor or a robotic arm. The Z-axis linear module drives the fixture carrying the cover plate assembly to move downward until the bottom surface of the cover plate assembly fits against the lower end cap. The pressing cylinder drives the upper heating element and the upper end cap to move downward so that the upper end cap fits against the cover plate assembly. After the cover plate assembly is hot-pressed, the upper heating element and the upper end cap move upward to reset. The Z-axis linear module drives the fixture carrying the cover plate assembly to move upward away from the lower end cap. Finally, the hot-pressed cover plate assembly is removed from the fixture by manual labor or a robotic arm. Since the cover plate assembly has been detached from the lower end cap by the Z-axis linear module after the hot-pressing operation, the cover plate assembly will not be reheated on the heating table due to failure to remove it in time or the cover plate assembly falling off during the removal and placement process. This effectively improves the yield of the cover plate assembly after hot pressing. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of the hot pressing device for the cover plate assembly in an embodiment of this utility model from a first-view perspective;

[0023] Figure 2 This is a schematic diagram of the overall structure of the hot pressing device for the cover plate assembly in an embodiment of this utility model from a second perspective.

[0024] Figure 3 This is an exploded view of the fixture and cover plate assembly in an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the upper and lower end caps in an embodiment of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the heat insulation column in an embodiment of this utility model.

[0027] In the picture:

[0028] 1. Base plate; 10. Longitudinal support plate; 101. Longitudinal slide rail; 102. First slider; 103. First bracket; 104. Second slider; 105. Second bracket; 11. Top plate; 12. Mounting base;

[0029] 2. Upper heating element; 20. Upper end cap; 21. Clearance space; 22. Drive plate; 23. Shoulder; 24. Retaining ring; 25. Heat insulation column; 26. Heat dissipation groove;

[0030] 3. Lower heating element; 30. Lower end cap;

[0031] 4. Z-axis linear module; 40. Drive motor; 41. Coupling; 42. Longitudinal lead screw; 43. Thread rolling bearing; 44. Bearing housing;

[0032] 5. Fixture; 50. Positioning hole; 51. Positioning step;

[0033] 6. Downward-pressing cylinder;

[0034] 7. Limit sensor; 70. Limit sensing plate;

[0035] 8. Cover plate assembly; 9. Control module. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0041] like Figure 1-5 As shown, this utility model provides a hot pressing device for a cover plate assembly. The hot pressing device for the cover plate assembly includes a base plate 1 and longitudinal support plates 10 installed at both ends of the base plate 1. A top plate 11 is connected between the top ends of the two longitudinal support plates 10. An upper heating element 2 is installed below the top plate 11 and can move up and down. An upper end cap 20 is connected to the bottom of the upper heating element 2. A lower heating element 3 is installed on the upper end face of the base plate 1. A lower end cap 30 is connected to the top end of the lower heating element 3. A Z-axis linear module 4 is installed on the outer side of the longitudinal support plate 10. A fixture 5 is connected to the moving end of the Z-axis linear module 4. The fixture 5 is provided with positioning holes 50 for supporting the cover plate assembly 8. The fixture 5 is located between the upper end cap 20 and the lower end cap 30. The bottom surface of the upper end cap 20 and the top surface of the lower end cap 30 are respectively provided with clearance positions 21 that match the fixture 5.

[0042] This utility model provides a hot pressing device for cover plate assemblies. The cover plate assembly 8 to be hot pressed is placed manually or by a robotic arm into the positioning hole 50 of the fixture 5. The Z-axis linear module 4 drives the fixture 5 carrying the cover plate assembly 8 downwards until the bottom surface of the cover plate assembly 8 abuts against the lower end cap 30. The pressing cylinder 6 drives the upper heating element 2 and the upper end cap 20 downwards so that the upper end cap 20 abuts against the cover plate assembly 8. After the hot pressing of the cover plate assembly 8 is completed, the upper heating element 2 and the upper end cap 20 move upwards to reset. The Z-axis linear module 4 drives the fixture 5 carrying the cover plate assembly 8 to move upward away from the lower end cap 30. Finally, the cover plate assembly 8, which has been hot-pressed, is removed from the fixture 5 by manual labor or a robotic arm. Since the cover plate assembly 8 has been removed from the lower end cap 30 by the Z-axis linear module 4 after the hot-pressing operation, it will not be reheated on the heating table if the cover plate assembly 8 is not removed in time or falls off during the removal and placement process. This effectively improves the yield of the cover plate assembly 8 after hot pressing.

[0043] In this embodiment, as Figure 1 and Figure 2 As shown, a downward-facing pressing cylinder 6 is installed on the top surface of the top plate 11. A drive plate 22 is connected to the top surface of the upper heating body 2. Two shoulders 23 are mirror-shaped on the top surface of the drive plate 22. A retaining ring 24 is provided inside the two shoulders 23. The telescopic end of the pressing cylinder 6 passes through the top plate 11 and is connected to the retaining ring 24. One side of the two shoulders 23 has an open structure, so that the retaining ring 24 can be embedded between the two shoulders 23 from the opening. In this way, not only can the drive plate 22 be stably connected to the telescopic end of the pressing cylinder 6, but it also facilitates the maintenance of the hot pressing device.

[0044] Specifically, such as Figure 1 As shown, two longitudinal slide rails 101 are installed on the inner side of one of the longitudinal support plates 10. A matching first slider 102 and a second slider 104 slide on each longitudinal slide rail 101. A first bracket 103 connects the two first sliders 102. A drive plate 22 is horizontally mounted on the first bracket 103. In this structure, the downward-pressing cylinder 6 drives the drive plate 22 to move up and down. Under the action of the longitudinal slide rails 101 and the first sliders 102, the upper heating element 2 and the upper end cap 20 can move up and down more linearly and stably, thereby improving the stability of the hot pressing device and the effect and efficiency of the hot pressing of the cover plate assembly 8. A second bracket 105 connects the two second sliders 104, and a fixture 5 is horizontally mounted on the second bracket 105.

[0045] In this embodiment, as Figure 1 and Figure 2As shown, the Z-axis linear module 4 includes a drive motor 40 mounted vertically downward on the top plate 11. The rotation shaft of the drive motor 40 passes through the top plate 11 and extends below it. A bearing seat 44 is installed at each of the upper and lower ends of the outer side of the longitudinal support plate 10 facing away from the longitudinal slide rail 101. A longitudinal lead screw 42 is rotatably connected between the two bearing seats 44. The top end of the longitudinal lead screw 42 passes through the bearing seat 44 and is connected to the rotation shaft of the drive motor 40 through a coupling 41. A rotatable thread rolling bearing 43 is installed on the longitudinal lead screw 42. One end of the second bracket 105 is connected to the thread rolling bearing 43. In this structure, the drive motor 40 drives the longitudinal lead screw 42 to rotate, thereby driving the second bracket 105 to move the fixture 5 up and down. Under the action of the longitudinal slide rail 101 and the second slider 104, the fixture 5 carrying the cover plate assembly 8 can move up and down more linearly and stably. On the one hand, this prevents the cover plate assembly 8 from shaking and falling off during the up and down movement of the fixture 5. On the other hand, it improves the hot pressing efficiency of the cover plate assembly 8. During hot pressing, the cover plate assembly 8 is first placed into the positioning hole 50 manually or by a robotic arm. The drive motor 40 then moves the fixture 5 and cover plate assembly 8 down to the lower end cap 30 for contact. The pressing cylinder 6 moves the upper heating element 2 and upper end cap 20 down to the upper surface of the cover plate assembly 8 for contact. After hot pressing, the upper heating element 2 and upper end cap 20 move upwards to reset. The drive motor 40 then moves the fixture 5 and cover plate assembly 8 upwards to detach from the lower end cap 30. Finally, the hot-pressed cover plate assembly 8 is removed from the fixture 5 manually or by a robotic arm. Because the cover plate assembly 8... After hot pressing, the cover plate assembly 8 immediately separates from the upper end cap 20 and the lower end cap 30. Therefore, when picking up or putting down the cover plate assembly 8, it will not be reheated or heated for too long due to failure to remove it in time. On the other hand, when picking up or putting down the cover plate assembly 8, if it is not held firmly by the operator or the robot, the cover plate assembly 8 will fall onto the fixture 5. Unlike traditional hot pressing devices, it will not fall onto the heating table and cause secondary heating. Compared with traditional hot pressing devices, the hot pressing device of this utility model effectively improves the hot pressing effect of the cover plate assembly 8, thereby improving the hot pressing yield of the cover plate assembly 8.

[0046] Furthermore, such as Figure 2 As shown, in order to precisely control the vertical movement of the fixture 5, an installation groove is provided on one side of the longitudinal support plate 10 located on the longitudinal lead screw 42. Two limit sensors 7 are installed in the installation groove in an adjustable manner. A limit sensing plate 70 matching the limit sensor 7 is installed at one end of the second bracket 105 connected to the thread rolling bearing 43. Since the distance between the two limit sensors 7 is adjustable, the movement of the fixture 5 between the upper end cap 20 and the lower end cap 30 is also precisely controlled by the limit sensing plate 70, so that the fixture 5 can accurately fit the cover plate assembly 8 against the lower end cap 30, thereby improving the heat pressing effect of the cover plate assembly 8.

[0047] Specifically, such as Figure 3 As shown, the positioning hole 50 on the fixture 5 is provided with multiple positioning steps 51 around its circumference. That is to say, the positioning hole 50 is surrounded by multiple positioning steps 51. The positioning hole 50 provides clearance space for the bottom end of the pole post, while the positioning steps 51 will precisely limit the end cap or isolation plate on the cover plate assembly 8, preventing the cover plate assembly 8 from shifting during the hot pressing operation and resulting in poor hot pressing effect. In this structure, the positioning hole 50 can be circular or rectangular to meet the hot pressing operation of cover plate assemblies 8 of different shapes and specifications, increasing the practicality of the hot pressing device.

[0048] Furthermore, such as Figure 4 As shown, the upper end cap 20 and the lower end cap 30 have the same structure. The structure of the clearance space 21 matches the structure of the fixture 5 and the pole on the cover plate assembly 8, so that the upper end cap 20 and the lower end cap 30 can simultaneously and tightly fit and abut against the upper and lower surfaces of the cover plate assembly 8, thereby increasing the heat-pressing effect of the cover plate assembly 8.

[0049] Furthermore, such as Figure 1 and Figure 5 As shown, in order to effectively isolate the upper heating element 2 from the driving plate 22 and the lower heating element 3 from the base plate 1, a plurality of heat insulation columns 25 are provided between the upper heating element 2 and the driving plate 22. A mounting base 12 is installed on the base plate 1, and a plurality of heat insulation columns 25 are provided between the mounting base 12 and the lower heating element 3. In this embodiment, the number of heat insulation columns 25 is preferably six, but not limited to six. Furthermore, a plurality of vertically staggered heat dissipation grooves 26 are formed on the heat insulation columns 25. Under this structure, a plurality of heat dissipation fins are formed between the plurality of heat dissipation grooves 26, so that the heat source on the upper heating element 2 or the lower heating element 3 can be effectively diffused on the heat insulation columns 25. On the other hand, the vertically staggered heat dissipation groove structure can also provide stable and firm support for the heat insulation columns 25, thereby improving the stability and service life of the hot pressing device.

[0050] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A hot pressing device for a cover plate assembly, comprising a base plate and longitudinal support plates mounted at both ends of the base plate, wherein a top plate is connected between the top ends of the two longitudinal support plates, characterized in that, An upper heating element is installed below the top plate and can move up and down. The bottom of the upper heating element is connected to an upper end cap. A lower heating element is installed on the upper surface of the bottom plate and the top of the lower heating element is connected to a lower end cap. The outer side of the longitudinal support plate is equipped with a Z-axis linear module, and the moving end of the Z-axis linear module is connected to a fixture. The fixture is provided with positioning holes for supporting the cover plate assembly. The fixture is located between the upper end cap and the lower end cap; the bottom surface of the upper end cap and the top surface of the lower end cap are respectively provided with clearance positions that match the fixture.

2. The hot pressing device for a cover plate assembly according to claim 1, characterized in that, A downward pressing cylinder is installed on the top surface of the top plate, and the telescopic end of the downward pressing cylinder passes through the top plate and is connected to the upper heating element.

3. A hot press apparatus for a cover plate assembly according to claim 2, wherein The top surface of the upper heating element is connected to a drive plate. The top surface of the drive plate is mirror-shaped with two shoulders. Each shoulder contains a retaining ring. The telescopic end of the lowering cylinder is connected to the retaining ring.

4. A hot press apparatus for a cover plate assembly according to claim 3, wherein One of the longitudinal support plates has a longitudinal slide rail installed on its inner side. A matching first slider slides on the longitudinal slide rail. A first bracket is connected to the first slider. The drive plate is installed on the first bracket.

5. A hot press apparatus for a cover plate assembly according to claim 4, wherein The Z-axis linear module includes a drive motor mounted on the top plate, the rotation shaft of the drive motor passing through the top plate and connected to a coupling; a longitudinal lead screw is rotatably mounted on the outer side of the longitudinal support plate facing away from the longitudinal slide rail, the top end of the longitudinal lead screw is connected to the other end of the coupling away from the drive motor, a thread rolling bearing is rotatably mounted on the longitudinal lead screw, and the fixture is connected to the thread rolling bearing.

6. A hot press apparatus for a cover plate assembly according to claim 5, wherein The longitudinal slide rail is provided with a matching second slider, the second slider is connected to a second bracket, one end of the second bracket is connected to the thread rolling bearing, and the fixture is horizontally mounted on the second bracket.

7. A hot pressing device for a cover plate assembly according to claim 6, characterized in that, The longitudinal support plate is equipped with two adjustable limit sensors on one side of the longitudinal lead screw, and the second bracket is connected to one end of the thread rolling bearing and is equipped with a limit sensing plate.

8. A hot pressing device for a cover plate assembly according to claim 3, characterized in that, Multiple heat insulation columns are connected between the drive plate and the upper heating element, and multiple heat insulation columns are connected between the lower heating element and the base plate.

9. A hot pressing device for a cover plate assembly according to claim 8, characterized in that, Each of the aforementioned heat insulation columns has multiple staggered heat dissipation slots.

10. A hot pressing device for a cover plate assembly according to claim 1, characterized in that, The positioning hole has multiple positioning steps on its circumference, and the positioning hole is circular or rectangular.

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