Lithium battery shell stamping die with good heat dissipation effect

Abstract

The utility model discloses a lithium battery shell punch press die with good heat dissipation effect relates to punch press die technical field, and this lithium battery shell punch press die, including base and being located on the base's frame, still includes punch press subassembly, bottom die subassembly, top die heat dissipation subassembly, bottom die heat dissipation subassembly, horizontal shift subassembly and longitudinal shift subassembly. The utility model can improve the heat dissipation efficiency of die significantly, and the heat dissipation structure design of optimization breaks through the limitation of only relying on the surface heat dissipation hole or simple air cooling, even under the high frequency punch press operation scene, can also take away the large amount of heat of die because of friction and energy conversion fast and continuously, effectively restraines the rapid rise of die temperature, the equipment is accurate to the heat generation characteristic of die different area and adapts, avoids the local overheating phenomenon caused by uneven existing cooling pipeline layout, ensures that the temperature of each part of die is in the balanced stable interval, reduces the die thermal deformation caused by local temperature difference.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, specifically to a stamping die for a lithium battery casing with good heat dissipation. Background Technology

[0002] Lithium-ion batteries have advantages such as high energy density, long lifespan, and low self-discharge efficiency, and are widely used in electronic devices, electric vehicles, and other fields. In the production process of lithium-ion batteries, the stamping of the battery casing is a crucial step. During operation, the stamping die generates a significant amount of heat due to friction between the die and the workpiece, as well as energy conversion during the stamping process. If this heat cannot be dissipated in time, it will cause the die temperature to rise, thus affecting the die's lifespan and the quality of the stamped parts. Existing stamping dies only have heat dissipation holes on the die surface, relying on natural air convection or air cooling for heat dissipation. When the stamping frequency is high, the die temperature will still rise rapidly. In other cases, the cooling pipe layout of some dies is uneven, causing local overheating of the die and resulting in deviations in the size of the stamped lithium battery case. Utility Model Content

[0003] This invention provides a lithium battery casing stamping die with good heat dissipation effect, which solves the problems of low heat dissipation efficiency and uneven heat dissipation in existing products.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery casing stamping die with good heat dissipation, comprising a base and a frame mounted on the base, and further comprising a stamping assembly, a bottom die assembly, a top die heat dissipation assembly, a transverse movement assembly, and a longitudinal movement assembly, wherein: The stamping assembly includes a top die, a top plate welded to the top of the top die, the top plate being fixed to the stamping back plate by screws, and a hydraulic cylinder being fixedly connected to the top of the stamping back plate by bolts. Several top dies are provided at equal intervals, with the length increasing and the width decreasing from left to right. A bottom plate is provided on the opposite side of the top plate. The base plate is welded with guide columns and spring columns. A telescopic spring is nested on the outside of the spring column. The telescopic spring is welded between the top plate and the base plate. The guide columns and spring columns penetrate the top plate and are fitted into the stamping back plate and are slidably engaged. The top mold penetrates the base plate and is slidably engaged. Several support columns are provided on the bottom surface of the base plate.

[0005] The hydraulic cylinder drives the stamping back plate to move down, which in turn drives the top die to cooperate with the bottom die to stamp the blank. During stamping, the support column at the bottom of the bottom plate first contacts the periphery of the bottom die groove, giving the bottom plate a reaction force. The bottom plate drives the guide column and spring column to slide into the stamping back plate and compress the telescopic spring.

[0006] When the top mold rises, the telescopic spring rebounds, keeping the bottom plate in its original position and creating relative movement with the top mold. This prevents the pressed product from sticking to the top mold and falling off, until the elastic potential energy of the telescopic spring is fully released and the support column disengages from the groove.

[0007] As a preferred technical solution of this utility model, the top mold heat dissipation assembly includes a heat dissipation fan, the heat dissipation fan is fixed inside the fan cover, the bottom of the fan cover is connected to the air inlet of the ventilation and cooling channel through a flexible hose, the ventilation and cooling channel is arranged in a ring around the inside of the top mold, the air outlet of the ventilation and cooling channel is located on both sides of the top mold, and the fan cover is fixed to one side of the stamping back plate. The ring-shaped air-cooling channel design ensures more even heat dissipation and prevents localized overheating of the mold.

[0008] As a preferred technical solution of this utility model, the bottom mold heat dissipation component includes a heat dissipation groove, a chiller, a heat dissipation column and heat dissipation fins, and the top and bottom sides of the heat dissipation groove are connected to the chiller through water pipes.

[0009] As a preferred technical solution of this utility model, the bottom mold assembly includes a bottom mold, and a plurality of springs are welded to the bottom surface of the bottom mold groove. A spring plate is welded to the top of the springs, and the spring plate is at the same height as the bottom mold groove opening.

[0010] The top die presses the blank into the bottom die groove, forming a shallow groove shape for the lithium battery casing. When the blank enters the mold groove, it simultaneously squeezes the spring plate and compresses the spring. When the pressing is completed and the top die rises, the spring plate rebounds and pushes the blank out of the mold groove, thus allowing the pressed product to be demolded smoothly.

[0011] As a preferred technical solution of this utility model, one end of the heat dissipation column is welded to the bottom of the outer side of the bottom mold at equal intervals, and the other end is welded to the bottom of the heat dissipation groove. The heat dissipation fins are equally spaced on the outer side of the bottom mold.

[0012] The heat dissipation fins and heat dissipation columns evenly distributed on the outer side of the bottom mold further accelerate the heat dissipation efficiency of the bottom mold, while avoiding local overheating of the bottom mold and ensuring the stamping quality of the pressed products.

[0013] As a preferred technical solution of this utility model, the transverse moving component includes a clamping plate, which is fixed to the transverse moving plate at equal intervals by screws. The transverse moving plate is fitted into the transverse moving groove and is slidably engaged. One end of the transverse moving plate is fixedly connected to an electric telescopic rod.

[0014] As a preferred technical solution of this utility model, the longitudinal movement component includes a motor, one end of which is provided with a motor gear, the motor gear engaging with a shaft gear, the shaft gear being welded to the middle of a bidirectional spiral shaft, the bidirectional spiral shaft engaging with a longitudinal movement plate and rotating in a spiral manner, the bottom of the longitudinal movement plate engaging with a sliding groove, and the top of the longitudinal movement plate being welded with a transverse movement groove.

[0015] Compared with the prior art, this utility model provides a lithium battery casing stamping die with good heat dissipation effect, which has the following beneficial effects: This utility model can significantly improve the heat dissipation efficiency of the die. Through the optimized heat dissipation structure design, it breaks through the limitations of the existing reliance on surface heat dissipation holes or simple air cooling. Even in high-frequency stamping operation scenarios, it can quickly and continuously remove the large amount of heat generated by the die due to friction and energy conversion, effectively suppressing the rapid rise of the die temperature. The equipment is precisely adapted to the heat dissipation characteristics of different areas of the die, avoiding the local overheating phenomenon caused by the uneven layout of existing cooling pipes, ensuring that the temperature of each part of the die is in a balanced and stable range, and reducing the thermal deformation of the die caused by local temperature differences. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a structural diagram of the upper part of this utility model; Figure 3 This is a schematic diagram of a portion of the stamping assembly of this utility model; Figure 4 This is a structural diagram of the bottom mold assembly of this utility model; Figure 5 This is a schematic diagram of the top mold heat dissipation assembly structure of this utility model; Figure 6 This is a structural diagram of the bottom mold heat dissipation assembly of this utility model; Figure 7 This is a structural diagram of the lower half of this utility model; Figure 8 This is a structural diagram of the longitudinal movement component of this utility model; Figure 9 This is a structural diagram of the transverse moving component of this utility model.

[0017] In the diagram: 1. Base; 2. Frame; 3. Stamping assembly; 4. Bottom mold assembly; 5. Top mold heat dissipation assembly; 6. Bottom mold heat dissipation assembly; 7. Transverse movement assembly; 8. Longitudinal movement assembly; 31. Top mold; 32. Top plate; 33. Stamping back plate; 34. Bottom plate; 35. Guide column; 36. Spring column; 37. Telescopic spring; 38. Hydraulic cylinder; 39. Support column; 41. Bottom mold; 42. Spring; 43. Spring plate; 51. Cooling fan; 52. Fan cover; 53. Air cooling channel; 61. Heat dissipation slot; 62. Chiller; 63. Heat dissipation column; 64. Heat dissipation fins; 71. Clamping plate; 72. Transverse movement plate; 73. Transverse movement slot; 74. Electric telescopic rod; 81. Motor; 82. Motor gear; 83. Shaft gear; 84. Bidirectional spiral shaft; 85. Longitudinal movement plate; 86. Slide groove. Detailed Implementation

[0018] 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. Example 1

[0019] Please see Figures 1-9 This utility model discloses a lithium battery casing stamping die with good heat dissipation, including a base 1 and a frame 2 disposed on the base 1, and further including a stamping assembly 3, a bottom die assembly 4, a top die heat dissipation assembly 5, a bottom die heat dissipation assembly 6, a transverse movement assembly 7, and a longitudinal movement assembly 8, wherein: Please refer to the appendix. Figure 2 and appendix Figure 3 The stamping assembly 3 includes a top die 31, a top plate 32 welded to the top of the top die 31, the top plate 32 being fixed to the stamping back plate 33 by screws, and the top of the stamping back plate 33 being fixedly connected to one end of the hydraulic cylinder 38 by bolts. The top die 31 is provided with several equidistant parts, and the length increases from left to right and the width decreases from left to right. The top plate 32 is provided with a bottom plate 34 on the opposite side. Guide pillars 35 and spring pillars 36 are welded on the base plate 34. A telescopic spring 37 is nested on the outside of the spring pillar 36. The telescopic spring 37 is welded between the top plate 32 and the base plate 34. The guide pillars 35 and spring pillars 36 penetrate the top plate 32 and are fitted into the stamping back plate 33 and are slidably engaged. The top mold 31 penetrates the base plate 34 and is slidably engaged. Several support pillars 39 are provided on the bottom surface of the base plate 34.

[0020] The hydraulic cylinder 38 drives the stamping back plate 33 to move down, which in turn drives the top die 31 to cooperate with the bottom die 41 to stamp the blank. During stamping, the support column 39 at the bottom of the bottom plate 34 first contacts the periphery of the groove of the bottom die 41, giving the bottom plate 34 a reaction force. The bottom plate 34 drives the guide column 35 and the spring column 36 to slide into the stamping back plate 33 and compress the telescopic spring 37.

[0021] When the top mold 31 rises, the telescopic spring 37 rebounds, keeping the bottom plate 34 in its original position and creating relative movement with the top mold 31. This prevents the pressed product from sticking to the top mold 31 and falling off, until the elastic potential energy of the telescopic spring 37 is fully released and the support column 39 disengages from the groove.

[0022] Please refer to the appendix. Figure 5 The top mold heat dissipation assembly 5 includes a heat dissipation fan 51, which is fixed inside the fan cover 52. The bottom of the fan cover 52 is connected to the air inlet of the ventilation and cooling channel 53 through a flexible hose. The ventilation and cooling channel 53 is arranged in a ring around the inside of the top mold 31. The air outlet of the ventilation and cooling channel 53 is located on both sides of the top mold 31. The fan cover 52 is fixed to one side of the stamping back plate 33. The 53-ring air-cooling channel design ensures more even heat dissipation and prevents localized overheating of the mold.

[0023] Please refer to the appendix. Figure 6 The bottom heat dissipation component 6 includes a heat dissipation slot 61, a chiller 62, a heat dissipation column 63, and heat dissipation fins 64. The top and bottom sides of the heat dissipation slot 61 are connected to the chiller 62 through water pipes.

[0024] Please refer to the appendix. Figure 4 The bottom mold assembly 4 includes a bottom mold 41. Several springs 42 are welded to the bottom surface of the groove of the bottom mold 41. Spring plates 43 are welded to the top of the springs 42. The spring plates 43 are at the same height as the groove of the bottom mold 41.

[0025] The top mold 31 presses the blank into the bottom mold 41 mold groove to form a shallow groove shape of the lithium battery shell. When the blank enters the mold groove, it simultaneously squeezes the spring plate 43 and compresses the spring 42. When the pressing is completed and the top mold 31 rises, the spring plate 43 is rebounded by the spring 42 and pushes the blank out of the mold groove, so that the pressed product can be demolded smoothly.

[0026] One end of the heat dissipation column 63 is welded to the bottom of the outer side of the bottom mold 41 at equal intervals, and the other end is welded to the bottom of the heat dissipation groove 61. The heat dissipation fins 64 are equally spaced on the outer side of the bottom mold 41.

[0027] The heat dissipation fins 64 and heat dissipation pillars 63 evenly distributed on the outer side of the bottom mold 41 further accelerate the heat dissipation efficiency of the bottom mold 41, avoid local overheating of the bottom mold 41, and ensure the stamping quality of the pressed products.

[0028] In this embodiment, the cooling fan 51 continuously blows airflow into the fan cover 52, and the airflow enters the interior of the top mold 31 through the air pipe, continuously carrying away the heat in the air cooling channel 53 and accelerating the heat dissipation inside the top mold 31; the chiller 62 continuously draws hot water from the heat dissipation tank 61 and returns it to the heat dissipation tank 61 after cooling, continuously cooling the bottom mold 41 immersed in the heat dissipation tank 61, resulting in good heat dissipation effect. Example 2

[0029] Based on the above embodiment 1, please refer to the appendix. Figure 7 , Figure 8 as well as Figure 9 The transverse component 7 includes a clamping plate 71, which is fixed to the transverse plate 72 at equal intervals by screws. The transverse plate 72 is fitted into the transverse groove 73 and is slidably engaged. One end of the transverse plate 72 is fixedly connected to the electric telescopic rod 74.

[0030] The longitudinal movement assembly 8 includes a motor 81, one end of which is provided with a motor gear 82, which engages with a shaft gear 83. The shaft gear 83 is welded to the middle of a bidirectional spiral shaft 84. The bidirectional spiral shaft 84 engages with a longitudinal movement plate 85 and rotates in a spiral manner. The bottom of the longitudinal movement plate 85 is fitted with a sliding groove 86, and the top is welded with a transverse movement groove 73.

[0031] In this embodiment, the motor 81 drives the motor gear 82 to rotate, and the motor gear 82 drives the bidirectional spiral shaft 84 to rotate through the shaft gear 83. This causes the longitudinal transfer plate 85 to interact with the longitudinal transfer plate 85 at both ends of the bidirectional spiral shaft 84 to slide closer together in the slide groove 86. This causes the transverse transfer groove 73 above the longitudinal transfer plate 85 to move closer together, thereby causing the transverse transfer plate 72 to drive the clamping plate 71 to form a stable clamp on the initially formed pressed product. Then, the electric telescopic rod 74 is activated to move the transverse transfer plate 72 forward by a fixed displacement, so that the pressed product is placed at the slot of the next bottom mold 41.

[0032] The working principle and usage process of this utility model are as follows: First, the stamping blank is placed on the top of the heat dissipation groove 61 and corresponds to the groove of the bottom mold 41. Then, the hydraulic cylinder 38 is started to drive the stamping back plate 33 to move down, thereby driving the top mold 31 to cooperate with the bottom mold 41 to stamp the blank. During stamping, the support column 39 at the bottom of the bottom plate 34 first contacts the periphery of the groove of the bottom mold 41, giving the bottom plate 34 a reaction force. The bottom plate 34 drives the guide column 35 and the spring column 36 to slide into the stamping back plate 33 and compress the telescopic spring 37. Subsequently, the top mold 31 presses the blank into the bottom mold 41 mold groove to form a shallow groove shape for the lithium battery casing. When the blank enters the mold groove, it simultaneously squeezes the spring plate 43 and compresses the spring 42. When the pressing is completed and the top mold 31 rises, the spring plate 43 rebounds from the spring 42 and pushes the blank out of the mold groove, thus allowing the pressed product to be demolded smoothly. At the same time, when the top mold 31 rises, the telescopic spring 37 rebounds to keep the bottom plate 34 in the original position and maintains a relative movement with the top mold 31, preventing the pressed product from sticking to the top mold 31 and not falling off. This continues until the elastic potential energy of the telescopic spring 37 is fully released, the support column 39 disengages from the groove, and the pressed product is stably placed on the spring plate 43. Then, the motor 81 is started, which drives the motor gear 82 to rotate. The motor gear 82 drives the bidirectional spiral shaft 84 to rotate through the shaft gear 83, which in turn interacts with the longitudinal plate 85 in a spiral manner. This causes the longitudinal plates 85 at both ends of the bidirectional spiral shaft 84 to slide and move closer in the slide groove 86, which in turn causes the transverse grooves 73 above the longitudinal plates 85 to move closer to each other. This causes the transverse plate 72 to drive the clamping plate 71 to form a stable clamp on the initially formed pressed product. Then, the electric telescopic rod 74 is started to move the transverse plate 72 forward to a fixed displacement, so that the pressed product is placed at the slot of the next bottom mold 41. As the length of the top mold 31 gradually increases and the width gradually decreases, the depth of the initially formed pressed product is pressed, stretched and extended step by step, and finally the battery shell product is obtained. During pressing, the cooling fan 51 continuously blows air into the fan cover 52. The airflow enters the top mold 31 through the air pipe, continuously carrying away the heat in the air cooling channel 53 and accelerating the heat dissipation inside the top mold 31. At the same time, the ring design of the air cooling channel 53 makes the heat dissipation more uniform and avoids local overheating of the mold. The chiller 62 continuously draws hot water from the heat dissipation tank 61 and returns it to the heat dissipation tank 61 after cooling, continuously cooling the bottom mold 41 immersed in the heat dissipation tank 61. The heat dissipation effect is good. At the same time, the heat dissipation fins 64 and heat dissipation columns 63 evenly distributed on the outer side of the bottom mold 41 further accelerate the heat dissipation efficiency of the bottom mold 41, while avoiding local overheating of the bottom mold 41 and ensuring the stamping quality of the pressed products.

Claims

1. A lithium battery casing stamping die with good heat dissipation, comprising a base (1) and a frame (2) disposed on the base (1), and further comprising a stamping assembly (3), a bottom die assembly (4), a top die heat dissipation assembly (5), a bottom die heat dissipation assembly (6), a transverse movement assembly (7), and a longitudinal movement assembly (8), characterized in that: The stamping assembly (3) includes a top die (31), a top plate (32) is welded to the top of the top die (31), the top plate (32) is fixed to the stamping back plate (33) by screws, and the top of the stamping back plate (33) is fixedly connected to one end of the hydraulic cylinder (38) by bolts; The top mold heat dissipation assembly (5) includes a heat dissipation fan (51), which is fixed inside the fan cover (52). The bottom of the fan cover (52) is connected to the air inlet of the ventilation cooling channel (53) through a flexible hose. The ventilation cooling channel (53) is arranged in a ring around the inside of the top mold (31), and the air outlet of the ventilation cooling channel (53) is located on both sides of the top mold (31). The bottom mold heat dissipation assembly (6) includes a heat dissipation groove (61), a chiller (62), a heat dissipation column (63), and heat dissipation fins (64). The top and bottom sides of the heat dissipation groove (61) are connected to the chiller (62) through water pipes.

2. The lithium battery shell stamping die with good heat dissipation effect according to claim 1, characterized in that: The bottom mold assembly (4) includes a bottom mold (41), and a number of springs (42) are welded to the bottom surface of the groove of the bottom mold (41). A spring plate (43) is welded to the top of the springs (42), and the spring plate (43) is at the same height as the groove of the bottom mold (41).

3. The lithium battery shell stamping die with good heat dissipation effect according to claim 2, characterized in that: One end of the heat dissipation column (63) is welded to the bottom of the outer side of the bottom mold (41) at equal intervals, and the other end is welded to the bottom of the heat dissipation groove (61). The heat dissipation fins (64) are equally spaced on the outer side of the bottom mold (41).

4. The lithium battery shell stamping die with good heat dissipation effect according to claim 3, characterized in that: The wind shield (52) is fixed on one side of the stamping back plate (33). The top mold (31) is provided with several equidistant parts, and the length increases from left to right and the width decreases from left to right. The bottom plate (34) is provided on the opposite side of the top plate (32).

5. The lithium battery shell stamping die with good heat dissipation effect according to claim 4, characterized in that: The bottom plate (34) is welded with guide posts (35) and spring posts (36). A telescopic spring (37) is nested on the outside of the spring post (36). The telescopic spring (37) is welded between the top plate (32) and the bottom plate (34). The guide posts (35) and spring posts (36) penetrate the top plate (32) and are fitted into the stamping back plate (33) and are slidably engaged. The top mold (31) penetrates the bottom plate (34) and is slidably engaged. The bottom surface of the bottom plate (34) is provided with several support posts (39).

6. The lithium battery shell stamping die with good heat dissipation effect according to claim 1, characterized in that: The transverse assembly (7) includes a clamping plate (71), which is fixed to the transverse plate (72) at equal intervals by screws. The transverse plate (72) is fitted into the transverse groove (73) and is slidably engaged. One end of the transverse plate (72) is fixedly connected to an electric telescopic rod (74).

7. The lithium battery shell stamping die with good heat dissipation effect according to claim 1, characterized in that: The longitudinal movement assembly (8) includes a motor (81), one end of which is provided with a motor gear (82), which engages with a shaft gear (83). The shaft gear (83) is welded to the middle of a bidirectional spiral shaft (84), which engages with a longitudinal movement plate (85) and rotates in a spiral manner. The bottom of the longitudinal movement plate (85) is fitted with a sliding groove (86), and the top is welded with a transverse movement groove (73).

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