Machining and welding device of new energy battery cover plate production line

Abstract

The invention discloses a machining and welding device of a new energy battery cover plate production line. The machining and welding device comprises a lifting mechanism and a welding assembly, and a contact ring piece, a guide ring piece and a fixed ring piece are arranged on the ring side of a welding head. The contact ring piece is provided with a first heat cavity and internally provided with a graphene cylinder piece, the graphene cylinder piece is provided with a bottom piece and a vertical cylinder piece, the bottom piece is attached to the temperature probe, and a semiconductor chilling plate is embedded in the outer ring face of the contact ring piece. A stroke rod is inserted into the guide ring piece and provided with an air vent, a tension spring is arranged between the guide ring piece and the fixed ring piece, and an air outlet is formed in the fixed ring piece and communicated with the air vent. According to the device, heat is absorbed through the graphene cylinder piece, monitoring is conducted through the temperature probe, targeted heat dissipation is conducted through the semiconductor chilling plate, heat dissipation is conducted through the vent hole channel, the existing welding thermal deformation problem is solved, the temperature of the peripheral area is evenly regulated and controlled, the assembly precision is improved, and the contradiction between cooling and welding quality is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing and welding processing, and in particular to a processing and welding device for a new energy battery cover production line. Background Art

[0002] In the field of new energy battery manufacturing, the welding process between the battery cover and the battery shell is a critical step. As the energy density of new energy batteries increases, the high heat generated during cover welding can easily cause significant thermal deformation of the cover. This directly affects the assembly accuracy of the cover and the shell, resulting in a decrease in product qualification rate and the need for frequent rework and adjustments, which not only increases production costs but also seriously affects production efficiency.

[0003] Existing solutions typically involve placing water cooling components in the cover plate welding area to control heat dissipation. However, this approach has significant drawbacks: due to the uncertainty of heat distribution during welding, the water cooling components struggle to accurately control the cooling level. Excessive cooling can force a significant amount of heat out of the weld area, compromising weld quality and resulting in insufficient weld strength. Increasing welding energy to maintain weld strength can further impact the surrounding area with heat, exacerbating thermal deformation and creating difficult-to-resolve technical conflicts.

[0004] In summary, how to improve the control accuracy of the temperature around the welding area, reduce thermal deformation, and avoid the welding area being affected by excessive or insufficient cooling has become a technical problem that needs to be solved. Summary of the Invention

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention provides a processing and welding device for a new energy battery cover production line, comprising a lifting mechanism and a welding assembly connected to the lifting mechanism. The welding assembly comprises a welding head for welding the battery cover. The welding head ring side is provided with a contact ring, a guide ring located above the contact ring, and a fixing ring fixedly connected to the guide ring, wherein the fixing ring is fixedly connected to the welding assembly.

[0007] The contact ring is provided with a plurality of first heat cavities, and a graphene tube sheet is arranged in the first heat cavity. The graphene tube sheet includes a bottom sheet flush with the bottom surface of the contact ring and a vertical tube sheet adhered to the inner wall of the first heat cavity. A temperature probe is adhered to the upper side of the bottom sheet. The outer ring surface of the contact ring is embedded with a plurality of semiconductor refrigeration sheets aligned with the first heat cavity, and the cooling surface of the semiconductor refrigeration sheet is adhered to the vertical tube sheet.

[0008] The guide ring is movably mounted with multiple travel rods, the lower ends of which are threaded into the first heat chamber of the contact ring. The travel rods are provided with vertically extending vent holes. A tension spring is positioned between the guide ring and the stationary ring, pressing against the top surfaces of the travel rods. The stationary ring also has multiple vent holes that mate with the vent holes in the travel rods.

[0009] As an optimal technical solution of the device of the present invention: a first socket is opened at the center of the contact ring, a second socket is opened at the center of the guide ring, a third socket is opened at the center of the fixed ring, and the welding head is installed through the third socket, the second socket, and the first socket.

[0010] As a preferred technical solution for the device of the present invention, a bottom block is disposed at the bottom of the inner periphery of the graphene cylinder, pressing downwardly on the bottom plate. A temperature probe is placed at the center of the bottom block and connected to a probe wiring harness, which extends upward through the vent and outlet holes. A hollow metal sleeve is disposed in the first heat chamber, with the bottom end of the sleeve abutting the bottom block and the top end abutting the travel rod. The hollow metal sleeve is aligned with the vent of the travel rod, and the inner diameter of the hollow metal sleeve is the same as the diameter of the vent of the travel rod.

[0011] As a preferred technical solution of the device of the present invention, when the bottom of the contact ring is not squeezed, there is a movable gap between the contact ring and the guide ring.

[0012] As a preferred technical solution of the device of the present invention: the guide ring is provided with a plurality of screw holes, the fixing ring is provided with a plurality of bolt insertion holes aligned with the screw holes, and bolt members are installed at the aligned bolt insertion holes and screw holes.

[0013] As a preferred technical solution of the device of the present invention, the travel rod includes a threaded sleeve and a retaining ring located above the threaded sleeve, wherein the retaining ring has a larger diameter than the threaded sleeve. The guide ring includes upper and lower vertically connected guide grooves, the retaining ring is mounted in the upper guide groove, and the threaded sleeve extends through the lower guide groove and is threadedly connected to a threaded surface provided on the inner wall of the first heat chamber.

[0014] As a preferred technical solution of the device of the present invention, the bottom surface of the fixed ring is provided with multiple spring slots, which are connected to the air outlet holes, and the tension spring is installed in the spring slots. The diameter of the air outlet holes is the same as the diameter of the air outlet holes, and the diameter of the tension spring is larger than the diameter of the air outlet holes.

[0015] A method for using a processing and welding device for a new energy battery cover production line, as follows:

[0016] S1. When the battery box is delivered to the welding station, the welding fixture uses a mechanical positioning structure to accurately position the battery box. The welding fixture then executes component movements to stably clamp and fix the battery box, ensuring that the workpiece position remains unchanged during the welding process.

[0017] S2. The control system issues a command, and the driving element of the lifting mechanism operates, driving the welding assembly to descend smoothly in the vertical direction, so that the welding head moves toward the welding position of the battery cover and enters the preset working area.

[0018] S3. During the descent of the welding assembly, the contact ring first contacts the area around the welding position of the battery cover under the elastic action of the tension spring. The abutment pressure is adjusted by the spring tension to ensure that the bottom surface of the contact ring is tightly fitted with the surface of the cover, forming a stable heat conduction interface.

[0019] S4. After the welding head reaches the set position, the welding power supply is turned on to heat and weld the welding position of the battery cover. The welding heat is transferred to the surrounding area. At this time, the graphene tube sheet in contact with the ring begins to absorb heat from the surrounding area.

[0020] S5. During the welding process, the temperature probe continuously monitors the temperature signal transmitted by the graphene tube and feeds back the real-time temperature data to the control system through the signal transmission path, providing data support for subsequent heat dissipation control.

[0021] S6. The control system independently controls the semiconductor refrigeration plates at corresponding locations based on the temperature data of different areas fed back by the temperature probes. It adjusts the cooling power according to the temperature difference, dissipates heat in a targeted manner on the graphene tube, and achieves uniform temperature control in the area surrounding the weld.

[0022] S7. The excess heat generated during the welding process accumulates in the first heat chamber and is discharged upward to the outside of the device through the through-channel formed by the vent hole of the stroke rod and the outlet hole of the fixed ring, completing the thermal cycle and heat dissipation process to ensure the stable operating temperature of the device.

[0023] Compared with the existing technology, the beneficial effects of the present invention are:

[0024] 1. The present invention uses graphene tubes to efficiently absorb heat from the welding area, combines real-time monitoring with semiconductor cooling sheets for targeted heat dissipation, and achieves uniform temperature control in the welding area, effectively reducing thermal deformation, improving the assembly accuracy of the cover and housing, and significantly reducing rework.

[0025] 2. The present invention adopts a localized and targeted heat dissipation strategy, which only regulates the heat in the non-critical areas around the weld, and will not adversely affect the normal heat distribution and welding strength of the weld area, thus resolving the contradiction between cooling and welding quality in the prior art.

[0026] 3. The present invention also utilizes the vent holes of the travel rod and the air outlet holes of the fixed ring to form a through channel, which quickly discharges the excess heat accumulated during the welding process to the outside of the device, constructing a stable thermal cycle heat dissipation system to ensure that the device maintains a stable temperature during the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the overall device of the present invention.

[0028] Figure 2 for Figure 1 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0029] Figure 3 for Figure 2 Schematic diagram of the structure with a partial enlargement at point B.

[0030] Figure 4 It is a schematic diagram of the disassembled structure of the contact ring, guide ring, fixed ring and related components in the present invention.

[0031] Figure 5 It is a structural schematic diagram of the contact ring and related components in the present invention.

[0032] Figure 6 It is a schematic diagram of the disassembled structure of the guide ring and the travel rod in the present invention.

[0033] Figure 7 It is a structural schematic diagram of the fixing ring in the present invention.

[0034] Among them: 1-battery fixture; 2-lifting mechanism; 3-welding assembly, 301-welding head; 4-contact ring, 401-first jack, 402-first heat chamber, 403-threaded surface; 5-graphene cylinder, 501-bottom plate, 502-vertical cylinder; 6-bottom block, 7-temperature probe; 8-probe harness; 9-semiconductor cooling plate; 10-hollow metal sleeve; 11-guide ring, 1101-second Socket, 1102-upper guide groove, 1103-lower guide groove, 1104-screw hole; 12-stroke rod, 1201-threaded sleeve, 1202-limiting ring, 1203-vent; 13-tension spring; 14-fixing ring, 1401-third socket, 1402-spring groove, 1403-vent, 1404-bolt socket; 15-bolt; 16-battery cover; 17-movable gap. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] Example 1: The present invention designs a processing and welding device for a new energy battery cover production line, such as Figure 1 、 Figure 3 、 Figure 4 , including a lifting mechanism 2, a welding assembly 3 connected to the lifting mechanism 2, and also configured with a contact ring 4, a graphene cylinder 5, a semiconductor cooling sheet 9, a guide ring 11, a fixing ring 14, etc. The specific structural configuration is as follows:

[0037] like Figure 3 、 Figure 4 、 Figure 5 , contact ring 4: The ring side is provided with a contact ring 4, a guide ring 11 located above the contact ring 4, and a fixed ring 14 fixedly connected to the guide ring 11. The contact ring 4 is provided with a plurality of first heat cavities 402, and a graphene tube sheet 5 is provided in the first heat cavity 402. The graphene tube sheet 5 includes a bottom sheet 501 flush with the bottom surface of the contact ring 4, and a vertical tube sheet 502 in contact with the inner wall of the first heat cavity 402. A temperature probe 7 is attached to the upper side of the bottom sheet 501. The outer ring surface of the contact ring 4 is embedded with a plurality of semiconductor cooling sheets 9 aligned with the first heat cavity 402, and the cooling surface of the semiconductor cooling sheet 9 is in contact with the vertical tube sheet 502. A first plug hole 401 is provided in the center of the contact ring 4.

[0038] like Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 The guide ring 11 is movably mounted with a plurality of travel rods 12. The lower ends of the travel rods 12 are screwed into the first heat chamber 402 of the contact ring 4. The travel rods 12 are provided with vertically extending ventilation holes 1203. A second insertion hole 1101 is provided at the center of the guide ring 11, along with a plurality of screw holes 1104, including an upper guide groove 1102 and a lower guide groove 1103 that are vertically connected.

[0039] like Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 The fixing ring 14 is fixedly connected to the welding assembly 3 and has a third socket 1401 at its center. The welding head 301 is installed through the third socket 1401, the second socket 1101, and the first socket 401. A tension spring 13 is disposed between the fixing ring 14 and the guide ring 11, which is in pressurized contact with the top surface of the travel rod 12. The fixing ring 14 also has a plurality of air outlet holes 1403, which are vertically connected with the air vent 1203 of the travel rod 12. The fixing ring 14 has a plurality of bolt sockets 1404 aligned with the screw holes 1104, and a plurality of spring slots 1402 are provided on the bottom surface, which are connected with the air outlet holes 1403.

[0040] like Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 The travel rod 12 includes a threaded sleeve 1201 and a limiting ring 1202 located above the threaded sleeve 1201. The limiting ring 1202 has a larger diameter than the threaded sleeve 1201. The limiting ring 1202 is mounted in the upper guide groove 1102. The threaded sleeve 1201 passes through the lower guide groove 1103 and is threadedly connected to a threaded sleeve provided on the inner wall of the first heat chamber 402.

[0041] like Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 Graphene tube sheet 5: A bottom block 6 is set at the bottom of the inner periphery, and the bottom block 6 is pressed down on the top of the bottom sheet 501. The temperature probe 7 is placed at the center of the bottom block 6 and is connected to the probe harness 8. The probe harness 8 passes upward through the vent 1203 and the outlet hole 1403.

[0042] like Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 , Hollow metal sleeve 10: A hollow metal sleeve 10 is configured in the first heat chamber 402, the bottom end of the hollow metal sleeve 10 abuts against the bottom block 6, the top end abuts against the stroke rod 12, and is aligned with the vent hole 1203 of the stroke rod 12. The inner diameter of the hollow metal sleeve 10 is the same as the diameter of the vent hole 1203 of the stroke rod 12.

[0043] like Figure 3 , Active gap 17: When the bottom of the contact ring 4 is not squeezed, there is an active gap 17 between the contact ring 4 and the guide ring 11.

[0044] like Figure 3 、 Figure 4 、 Figure 5 , Bolt member 15: Install the bolt member 15 at the aligned bolt insertion hole 1404 and screw hole 1104 positions.

[0045] Example 2: The processing and welding device designed by the present invention is used in the following manner:

[0046] S1. Positioning and clamping: When the battery box is transferred to the welding station, the welding fixture 1 accurately positions the battery box through the mechanical positioning structure. Then the fixture actuator moves to stably clamp and fix the battery box to ensure that the position of the workpiece remains unchanged during the welding process.

[0047] S2. Welding assembly descends: The control system issues a command, the driving element of the lifting mechanism 2 is activated, driving the welding assembly 3 to descend smoothly in the vertical direction, so that the welding head 301 moves toward the welding position of the battery cover 16 and enters the preset working area.

[0048] S3. Contact ring abutment: During the descent of the welding assembly 3, the contact ring 4 first contacts the area around the welding position of the battery cover 16 under the elastic action of the tension spring 13, and the abutment pressure is adjusted by the spring tension to ensure that the bottom surface of the contact ring 4 is tightly fitted with the surface of the cover to form a stable heat conduction interface.

[0049] S4. Welding and heat absorption: After the welding head 301 reaches the set position, the welding power supply is turned on to heat and weld the welding position of the battery cover 16. The welding heat is transferred to the surrounding area. At this time, the graphene tube sheet 5 in contact with the ring 4 begins to absorb heat from the surrounding area.

[0050] S5. Temperature monitoring: During the welding process, the temperature probe 7 continuously monitors the temperature signal transmitted by the graphene tube 5 and feeds back the real-time temperature data to the control system through the signal transmission path, providing data support for subsequent heat dissipation control.

[0051] S6. Targeted heat dissipation: The control system independently controls the semiconductor refrigeration plate 9 at each corresponding position based on the temperature data of different areas fed back by the temperature probe 7, adjusts the cooling power according to the temperature difference, and performs targeted heat dissipation on the graphene tube sheet 5 to achieve uniform temperature control in the area surrounding the welding.

[0052] S7. Thermal cycle heat dissipation: The excess heat generated during the welding process accumulates in the first heat chamber 402, and the heat is discharged upward to the outside of the device through the through channel formed by the vent hole 1203 of the stroke rod 12 and the air outlet hole 1403 of the fixing ring 14, completing the thermal cycle heat dissipation process and ensuring the stable operating temperature of the device.

[0053] Example 3: The installation method of the processing and welding device designed by the present invention is as follows:

[0054] First, the internal components of the contact ring are installed: the graphene cylinder 5 is placed in the first heat chamber 402 of the contact ring 4, so that the bottom plate 501 is flush with the bottom surface of the contact ring 4, and the vertical cylinder 502 is in contact with the inner wall of the first heat chamber 402; the bottom block 6 with the temperature probe 7 is attached to the upper side of the bottom plate 501, and the temperature probe 7 is in contact with the bottom plate 501, and the probe harness 8 is passed upward through the vent 1203 of the travel rod 12 and the vent 1403 of the fixing ring 14 to be installed later.

[0055] The second step is to install the semiconductor refrigeration sheet: embed the semiconductor refrigeration sheet 9 into the outer ring surface of the contact ring 4 so that the cooling surface fits the vertical tube sheet 502, and the position of the semiconductor refrigeration sheet 9 corresponds one-to-one with the first heat chamber 402.

[0056] The third step is to install the travel rod: install the limiting ring part 1202 in the upper guide groove 1102 of the guide ring 11, and the threaded sleeve 1201 passes through the lower guide groove 1103 and is screwed to the threaded surface of the inner wall of the first heat chamber 402 to ensure that the travel rod 12 can move up and down in the guide ring 11.

[0057] Step 4: Install the hollow metal sleeve: Install the hollow metal sleeve 10 in the first heat chamber 402 so that its bottom end abuts the bottom block 6. Then, screw the threaded sleeve 1201 of the travel rod 12 onto the threaded surface of the first heat chamber 402 so that the top of the hollow metal sleeve 10 abuts the travel rod 12 and the vent holes 1203 of the hollow metal sleeve 10 and the travel rod 12 are aligned to ensure that heat can be discharged upward through the hollow structure.

[0058] Step 5: Install the tension spring: Install the tension spring 13 in the spring groove 1402 on the bottom surface of the fixed ring 14. The spring groove 1402 is connected to the air outlet 1403. The lower end of the tension spring 13 is in compression contact with the top surface of the travel rod 12 to form an elastic support structure.

[0059] Step 6: Connect the guide ring and the fixed ring: align the screw hole 1104 of the guide ring 11 with the bolt insertion hole 1404 of the fixed ring 14, and insert the bolt 15 into the screw hole 1104 and the bolt insertion hole 1404 to fix the two together.

[0060] Step 7: Check the active gap: After installation, check the active gap 17 between the contact ring 4 and the guide ring 11 when the contact ring 4 is not squeezed to ensure that the contact ring 4 can be flexibly pressed down and reset.

[0061] Step 8. Insert the welding head: stack the contact ring 4, guide ring 11, and fixed ring 14 in sequence, aligning the first socket 401, second socket 1101, and third socket 1401 in the center of the three, and then insert the welding head 301 through the three sockets to ensure that the welding head 301 is coaxial with the rings.

[0062] Step 9: Line connection: Connect the probe harness 8 of the temperature probe 7 to the control system, and also connect the line of the semiconductor refrigeration piece 9 to the control system to realize the linkage control of temperature detection and refrigeration.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A processing and welding device for a new energy battery cover production line, comprising a lifting mechanism (2), a welding assembly (3) connected to the lifting mechanism (2), the welding assembly (3) comprising a welding head (301) for welding the battery cover, characterized in that: The ring side of the welding head (301) is provided with a contact ring (4), a guide ring (11) located above the contact ring (4), and a fixed ring (14) fixedly connected to the guide ring (11), wherein the fixed ring (14) is fixedly connected to the welding assembly (3); The contact ring (4) is provided with a plurality of first heat cavities (402), and a graphene tube sheet (5) is arranged in the first heat cavity (402), and the graphene tube sheet (5) comprises a bottom sheet (501) flush with the bottom surface of the contact ring (4), and a vertical tube sheet (502) affixed to the inner wall of the first heat cavity (402), a temperature probe (7) is affixed to the upper side of the bottom sheet (501), and a plurality of semiconductor refrigeration sheets (9) aligned with the first heat cavity (402) are embedded in the outer ring surface of the contact ring (4), and the cooling surface of the semiconductor refrigeration sheet (9) is affixed to the vertical tube sheet (502); The guide ring (11) is movably inserted with a plurality of travel rods (12), the lower ends of the travel rods (12) are screwed and inserted into the first heat cavity (402) of the contact ring (4), and the travel rods (12) are provided with vertically penetrating vent holes (1203); A tension spring (13) is arranged between the guide ring (11) and the fixed ring (14) to be in compression contact with the top surface of the travel rod (12). The fixed ring (14) is also provided with a plurality of air outlet holes (1403). The air outlet holes (1403) are vertically connected and matched with the air vents (1203) of the travel rod (12).

2. The processing and welding device for a new energy battery cover production line according to claim 1 is characterized in that: The contact ring (4) has a first plug hole (401) at its center, the guide ring (11) has a second plug hole (1101) at its center, the fixed ring (14) has a third plug hole (1401) at its center, and the welding head (301) is installed through the third plug hole (1401), the second plug hole (1101), and the first plug hole (401).

3. The processing and welding device for a new energy battery cover production line according to claim 1 is characterized in that: A bottom block (6) is provided at the inner bottom of the graphene tube sheet (5), the bottom block (6) is pressed downward on the bottom sheet (501), the temperature probe (7) is placed at the center of the bottom block (6) and is connected to a probe harness (8), and the probe harness (8) passes upward through the vent hole (1203) and the air outlet hole (1403); Wherein, a hollow metal sleeve (10) is arranged in the first heat chamber (402), the bottom end of the hollow metal sleeve (10) abuts against the bottom block (6), and the top end abuts against the travel rod (12); The hollow metal sleeve (10) is aligned with the vent hole (1203) of the travel rod (12), and the inner diameter of the hollow metal sleeve (10) is the same as the diameter of the vent hole (1203) of the travel rod (12).

4. The processing and welding device for a new energy battery cover production line according to claim 1 is characterized in that: When the bottom of the contact ring (4) is not squeezed, a movable gap (17) exists between the contact ring (4) and the guide ring (11).

5. The processing and welding device for a new energy battery cover production line according to claim 1 is characterized in that: The guide ring (11) is provided with a plurality of screw holes (1104), and the fixing ring (14) is provided with a plurality of bolt insertion holes (1404) aligned with the screw holes (1104). Bolt members (15) are installed at the positions of the aligned bolt insertion holes (1404) and the screw holes (1104).

6. The processing and welding device for a new energy battery cover production line according to claim 1, characterized in that: The travel rod (12) comprises a threaded sleeve (1201) and a limiting ring portion (1202) located above the threaded sleeve (1201), wherein the limiting ring portion (1202) has a larger diameter than the threaded sleeve (1201); The guide ring member (11) comprises an upper guide groove (1102) and a lower guide groove (1103) which are vertically connected. The limiting ring portion (1202) is mounted in cooperation with the upper guide groove (1102). The threaded sleeve (1201) passes through the lower guide groove (1103) and is screwed to a threaded surface (403) provided on the inner wall of the first heat chamber (402).

7. The processing and welding device for a new energy battery cover production line according to claim 1, characterized in that: The bottom surface of the fixing ring (14) is provided with a plurality of spring grooves (1402), the spring grooves (1402) are in conjunction with the air outlet holes (1403), and the tension springs (13) are mounted in the positions of the spring grooves (1402); The diameter of the vent hole (1203) is the same as the diameter of the air outlet hole (1403), and the diameter of the tension spring (13) is larger than the diameter of the air outlet hole (1403).

8. The processing and welding device for a new energy battery cover production line according to claim 1 is characterized in that: Including the use of welding equipment, the contents are as follows: S1. When the battery box is transferred to the welding station, the welding fixture (1) accurately positions the battery box through the mechanical positioning structure, and then the welding fixture executes the component action to stably clamp the battery box to ensure that the position of the workpiece remains unchanged during the welding process; S2. The control system issues a command, the driving element of the lifting mechanism (2) moves, driving the welding assembly (3) to descend steadily in the vertical direction, so that the welding head (301) moves toward the welding position of the battery cover (16) and enters the preset working area; S3. During the descent of the welding assembly (3), the contact ring (4) first contacts the area surrounding the welding position of the battery cover (16) under the elastic action of the tension spring (13), and the abutment pressure is adjusted by the spring tension to ensure that the bottom surface of the contact ring (4) is tightly fitted with the surface of the cover, forming a stable heat conduction interface; S4. After the welding head (301) reaches the set position, the welding power supply is turned on to heat and weld the welding position of the battery cover (16). The welding heat is conducted to the surrounding area. At this time, the graphene tube sheet (5) of the contact ring (4) begins to absorb heat from the surrounding area; S5. During the welding process, the temperature probe (7) continuously monitors the temperature signal transmitted by the graphene tube (5), and feeds back the real-time temperature data to the control system through the signal transmission path to provide data support for subsequent heat dissipation control; S6. The control system independently controls the semiconductor refrigeration plate (9) at each corresponding position according to the temperature data of different areas fed back by the temperature probe (7), adjusts the cooling power according to the temperature difference, and performs targeted heat dissipation on the graphene tube (5), thereby achieving uniform temperature control in the welding surrounding area; S7. The excess heat generated during the welding process accumulates in the first heat chamber (402), and the heat is discharged upward to the outside of the device through the through-channel formed by the vent hole (1203) of the stroke rod (12) and the air outlet hole (1403) of the fixed ring (14), completing the heat cycle heat dissipation process.

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