Formation cold pressing jig
The cold pressing fixture driven by the pressurizing mechanism and ball screw transmission system solves the problems of stability and height adjustment of the cold pressing fixture, realizes stable clamping and cooling of the battery cell, and improves the cold pressing accuracy of the battery cell and the production capacity of the equipment.
Patent Information
- Application Number
- CN202520264292.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-18
AI Technical Summary
The cold pressing fixtures of existing hot-cold pressing formation machines have poor stability, are prone to shaking, generate noise, and cause friction damage to the batteries. Furthermore, the height cannot be adjusted, which affects the charging and discharging performance and thickness of the battery cells.
The system employs a pressurizing mechanism and a ball screw drive system, combined with a servo motor drive, to achieve stable clamping and height adjustment of the battery cells. Noise is reduced by buffer plates and guide columns, and uniform cooling is achieved using cooling water channels.
It improves the stability and precision of the cell cold pressing process, reduces noise, ensures the consistency of cell charging and discharging performance and thickness dimensions, and enhances equipment capacity.
Smart Images
Figure CN223828472U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hot and cold pressing forming machine technology, specifically to a forming and cold pressing fixture. Background Technology
[0002] Hot and cold pressing formation machines are crucial equipment in the lithium battery manufacturing industry, used for the hot pressing formation and cold pressing shaping of soft-pack lithium battery cells. During the lithium-ion battery formation and hot and cold pressing process, the battery cells are first fed manually or automatically into the feeding module. Then, a robotic arm picks up the cells from the preparation fixture and places them into the hot pressing formation fixture, where the fixture automatically heats, pressurizes, and forms the cells. After hot pressing and formation, the robotic arm picks up the cells again and places them into the cold pressing fixture. The cold pressing fixture pressurizes, cools, and shapes the cells. Once shaped, the cells are gripped back into the preparation fixture, where they are unloaded manually or mechanically.
[0003] Therefore, cold pressing and shaping of battery cells is the final process before cell blanking, and this process directly affects the charge-discharge performance and thickness of the cells. To improve equipment productivity, the cold pressing fixture needs to be able to clamp multiple sets of battery cells simultaneously and achieve cold pressing and shaping of the cells.
[0004] However, the cold pressing fixtures of existing hot-cold pressing formation machines mostly use a separate support structure for clamping and cold pressing, which has poor stability. During the clamping process, shaking will occur, and friction will generate noise. The clamping tightness cannot be guaranteed, and it is easy to damage the battery. In addition, the cold pressing mechanism of traditional cold pressing fixtures is a fixed structure and cannot be adjusted according to the height of the battery. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a chemical forming cold pressing fixture that has the advantages of improved stability and reduced noise, and has a high degree of adjustability.
[0006] The technical solution of this utility model is as follows:
[0007] A chemical forming cold pressing fixture includes a mounting base, on which a pressurizing mechanism is provided. The mounting base is connected to a side plate via four front and rear tie rods. The mounting base and the side plate are arranged opposite each other. Four ball screws are rotatably mounted between the mounting base and the side plate. The pressurizing mechanism is drivenly connected to the four ball screws. A pressure buffer plate is elastically provided on the inner side of the side plate. Two guide rods are installed between the mounting base and the pressure buffer plate. A push plate is movably mounted on the four ball screws and the two guide rods. A plurality of cold pressing mechanisms are movably mounted on the two guide rods between the push plate and the pressure buffer plate.
[0008] The cold pressing mechanism includes a first bearing plate, a second bearing plate, a lifting cooling plate, several extrusion structures, a first lifting guide rail, and a second lifting guide rail. The first and second bearing plates are respectively sleeved on two guide rods. The lifting cooling plate is movably connected between the first and second bearing plates. The several extrusion structures are installed at the top of the lifting cooling plate. The bottom of the lifting cooling plate is provided with a cooling water inlet, a first cooling water outlet, a second cooling water outlet, and a third cooling water outlet. The cooling water inlet, the first cooling water outlet, the second cooling water outlet, and the third cooling water outlet are evenly distributed. The interior of the lifting cooling plate is provided with... The system comprises a first cooling water channel, a second cooling water channel, and a third cooling water channel. The cooling water inlet and the first cooling water outlet are connected through the first cooling water channel. The second cooling water outlet and the third cooling water outlet are connected through the second cooling water channel. The first cooling water channel and the second cooling water channel are connected through the third cooling water channel. The first lifting guide rail and the second lifting guide rail are respectively vertically installed below the first bearing plate and the second bearing plate. The two sides of the lifting cooling plate are respectively slidably connected to the inner sides of the first lifting guide rail and the second lifting guide rail. The outer sides of the first lifting guide rail and the second lifting guide rail are equipped with locking structures corresponding to the lifting cooling plate.
[0009] Furthermore, the pressurizing mechanism includes a servo motor, a transmission gear, two driven gears, two driving gears, and four brake gears. The servo motor is located on the outside of the mounting base, and the transmission gear, two driven gears, two driving gears, and four brake gears are all rotatably mounted inside the mounting base. The motor shaft of the servo motor is connected to the transmission gear, and both sides of the transmission gear mesh sequentially with the driven gears, driving gears, and two brake gears. One end of the ball screw is connected to the brake gear.
[0010] Furthermore, two guide posts are arranged opposite each other on the inner side of the side plate, the pressure buffer plate is movably mounted on the two guide posts, and a buffer spring sleeved on the guide posts is installed between the pressure buffer plate and the side plate.
[0011] Furthermore, the extrusion structure includes an extrusion seat, a first extrusion block, a second extrusion block, and two tension springs. The extrusion seat is detachably mounted on the lifting cooling plate. The first extrusion block and the second extrusion block are respectively movably disposed on the left and right sides of the extrusion seat. The upper parts of the first extrusion block and the second extrusion block are rotatably connected to the extrusion seat. The middle parts of the first extrusion block and the second extrusion block protrude to both sides, and tension springs are respectively provided between them and the extrusion seat.
[0012] Furthermore, the lifting cooling plate has several mounting holes in the same row, and the extrusion seat of the extrusion structure can be detachably installed on the mounting holes through the connecting column at the bottom.
[0013] Compared to existing technologies, the advantages of this invention are as follows: By setting up a pressurizing mechanism, when the battery is cold-pressed, it is placed between two adjacent cold-pressing mechanisms. The servo motor is then activated, and its output shaft drives the transmission gear to rotate. The transmission gear, through the driven gear, drives the drive gear to rotate, which in turn drives the brake gear, thereby rotating the ball screw. The ball screw then drives the push plate to move towards the cold-pressing mechanism. Under the pushing force of the push plate, the cold-pressing mechanism moves along the guide rod, reducing the distance between the two adjacent cold-pressing mechanisms during this movement. The battery is clamped, and the push plate moves along the pull rod during the process. During the cold pressing process, it is supported by multiple pull rods and guide rods, which ensures the stability of the cold pressing mechanism. This allows the cold pressing mechanism to move smoothly, reduces noise, improves the pressure uniformity of the entire formation machine, and greatly improves the formation accuracy. In addition, before the battery is cold pressed, the height can be adjusted according to the battery. When adjusting the height, the locking structure on both sides of the cold pressing mechanism is unlocked, and the lifting cooling plate can move up and down along the first and second lifting guide rails. After moving to the appropriate height, it is locked by the locking structure. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 A schematic diagram of the structure of a chemical forming cold pressing fixture provided by this utility model. Figure 1 ;
[0016] Figure 2 A schematic diagram of the structure of a chemical forming cold pressing fixture provided by this utility model Figure 2 ;
[0017] Figure 3 This is a schematic diagram of the cold pressing mechanism described in this utility model;
[0018] Figure 4 This is a schematic diagram of the internal structure of the lifting and cooling plate described in this utility model. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 merely illustrative of the present utility model and are not intended to limit the present utility model.
[0020] To illustrate the technical solution described in this utility model, specific embodiments are described below.
[0021] Example
[0022] Please see Figure 1 , Figure 2 This embodiment provides a chemical forming cold pressing fixture, including a mounting base 1, a pressurizing mechanism 2 on the mounting base 1, a side plate 4 connected to the mounting base 1 by four front and rear tie rods 3, the mounting base 1 and the side plate 4 are arranged opposite each other, four ball screws 5 are rotatably mounted between the mounting base 1 and the side plate 4, the pressurizing mechanism 2 is connected to the four ball screws 5, two guide posts 6 are arranged opposite each other on the inner side of the side plate 4, a pressure buffer plate 7 is movably mounted on the two guide posts 6, a buffer spring 8 sleeved on the guide posts 6 is installed between the pressure buffer plate 7 and the side plate 4, two guide rods 9 are installed between the mounting base 1 and the pressure buffer plate 7, a push plate 10 is movably mounted on the four ball screws 5 and the two guide rods 9, and a plurality of cold pressing mechanisms 11 are movably mounted on the two guide rods 9 between the push plate 10 and the pressure buffer plate 7.
[0023] The pressurizing mechanism 2 includes a servo motor 21, a transmission gear 22, two driven gears 23, two driving gears 24, and four brake gears 25. The servo motor 21 is located on the outside of the mounting base 1. The transmission gear 22, the two driven gears 23, the two driving gears 24, and the four brake gears 25 are all rotatably mounted inside the mounting base 1. The motor shaft of the servo motor 21 is connected to the transmission gear 22. The two sides of the transmission gear 22 are sequentially engaged with the driven gears 23, the driving gears 24, and the two brake gears 25. One end of the ball screw 5 is connected to the brake gear 25. Working principle: When the servo motor 21 is started, the output shaft of the servo motor 21 will drive the transmission gear 22 to rotate. The transmission gear 22 will drive the drive gear 24 to rotate through the driven gear 23. The drive gear 24 will drive the brake gear 25 to rotate, thereby driving the ball screw 5 to rotate. The ball screw 5 will drive the push plate 10 to move towards the cold pressing mechanism 11. Under the pushing force of the push plate 10, the cold pressing mechanism 11 moves along the guide rod 9. During the movement, the distance between two adjacent cold pressing mechanisms 11 will be reduced, thereby clamping and cold pressing the battery. During the movement of the push plate 10, it will be displaced along the pull rod 3. During the cold pressing process, it is supported by multiple pull rods 3 and guide rods 9, which ensures the stability of the movement of the cold pressing mechanism 11, makes the cold pressing mechanism 11 move smoothly, reduces noise, improves the pressure uniformity of the entire formation machine, and greatly improves the formation accuracy.
[0024] like Figure 3As shown, the cold pressing mechanism 11 includes a first bearing plate 111, a second bearing plate 112, a lifting cooling plate 113, several extrusion structures 114, a first lifting guide rail 115, and a second lifting guide rail 116. The first bearing plate 111 and the second bearing plate 112 are respectively sleeved on two guide rods 9. The lifting cooling plate 113 is vertically connected between the first bearing plate 111 and the second bearing plate 112. Several extrusion structures 114 are installed at the top of the lifting cooling plate 113. The battery is placed between the lifting cooling plates 113 of the two cold pressing mechanisms 11 and is clamped by the several extrusion structures 114. Figure 4 As shown, the bottom end of the lifting cooling plate 113 is provided with a cooling water inlet 1131, a first cooling water outlet 1132, a second cooling water outlet 1133, and a third cooling water outlet 1134, which are evenly distributed. The interior of the lifting cooling plate 113 is provided with a first cooling water channel 1135, a second cooling water channel 1136, and a third cooling water channel 1137. The cooling water inlet 1131 and the first cooling water outlet 1132 are connected through the first cooling water channel 1135; the second cooling water outlet 1133 and the third cooling water outlet 1134 are connected through the second cooling water channel 1136; and the first cooling water channel 1135 and the second cooling water channel 1136 are connected through the third cooling water channel 1137. During the battery clamping process, cooling water enters from the cooling water inlet 1131 and passes through the first cooling water channel 1137 in sequence. Channel 1135, third cooling water channel 1137, and second cooling water channel 1136 uniformly cool the battery attached to the lifting cooling plate 113. The first lifting guide rail 115 and the second lifting guide rail 116 are respectively vertically installed below the first bearing plate 111 and the second bearing plate 112. The two sides of the lifting cooling plate 113 are slidably connected to the inner sides of the first lifting guide rail 115 and the second lifting guide rail 116. The outer sides of the first lifting guide rail 115 and the second lifting guide rail 116 are equipped with locking structures 117 corresponding to the lifting cooling plate 113. This structural design enables the cooling mechanism to have a height adjustment function, which can be adjusted according to the height of the battery. When adjusting the height, after unlocking the locking structures 117 on both sides of the cooling mechanism, the lifting cooling plate 113 can move up and down along the first lifting guide rail 115 and the second lifting guide rail 116. After moving to a suitable height, it can be locked by the locking structures 117.
[0025] The extrusion structure 114 includes an extrusion seat 1141, a first extrusion block 1142, a second extrusion block 1143, and two tension springs 1144. A plurality of mounting holes 1138 are arranged in a row on the lifting cooling plate 113. The extrusion seat 1141 of the extrusion structure 114 is detachably mounted on the mounting holes 1138 via a connecting post at the bottom. The extrusion structure can be installed according to the length of the battery. The first extrusion block 1142 and the second extrusion block 1143 are respectively movably disposed on the left and right sides of the extrusion seat 1141. The upper parts of the first extrusion block 1142 and the second extrusion block 1143 are rotatably connected to the extrusion seat 1141. The middle portions of block 1142 and the second extrusion block 1143 protrude to both sides respectively, and tension springs 1144 are respectively provided between them and the extrusion seat 1141. When clamping the battery, two adjacent batteries will touch the first extrusion block 1142 and the second extrusion block 1143 respectively. The first extrusion block 1142 and the second extrusion block 1143 are compressed inward under the action of the tension springs 1144 until the battery is pressed against the lifting cooling plate 113. After the cold pressing is completed, the servo motor 21 stops, the pressure buffer plate 7 is elastically reset, and the first extrusion block 1142 and the second extrusion block 1143 rebound and reset under the action of the tension springs 1144.
[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A chemical forming cold pressing fixture, characterized in that: The device includes a mounting base, on which a pressurizing mechanism is provided. The mounting base is connected to a side plate via four front and rear tie rods. The mounting base and the side plate are arranged opposite each other. Four ball screws are rotatably mounted between the mounting base and the side plate. The pressurizing mechanism is driven by the four ball screws. A pressure buffer plate is elastically provided on the inner side of the side plate. Two guide rods are installed between the mounting base and the pressure buffer plate. A push plate is movably mounted on the four ball screws and the two guide rods. Several cold pressing mechanisms are movably mounted on the two guide rods between the push plate and the pressure buffer plate. The cold pressing mechanism includes a first bearing plate, a second bearing plate, a lifting cooling plate, several extrusion structures, a first lifting guide rail, and a second lifting guide rail. The first and second bearing plates are respectively sleeved on two guide rods. The lifting cooling plate is movably connected between the first and second bearing plates. The several extrusion structures are installed at the top of the lifting cooling plate. The bottom of the lifting cooling plate is provided with a cooling water inlet, a first cooling water outlet, a second cooling water outlet, and a third cooling water outlet. The cooling water inlet, the first cooling water outlet, the second cooling water outlet, and the third cooling water outlet are evenly distributed. The interior of the lifting cooling plate is provided with... The system comprises a first cooling water channel, a second cooling water channel, and a third cooling water channel. The cooling water inlet and the first cooling water outlet are connected through the first cooling water channel. The second cooling water outlet and the third cooling water outlet are connected through the second cooling water channel. The first cooling water channel and the second cooling water channel are connected through the third cooling water channel. The first lifting guide rail and the second lifting guide rail are respectively vertically installed below the first bearing plate and the second bearing plate. The two sides of the lifting cooling plate are respectively slidably connected to the inner sides of the first lifting guide rail and the second lifting guide rail. The outer sides of the first lifting guide rail and the second lifting guide rail are equipped with locking structures corresponding to the lifting cooling plate.
2. The chemical forming cold pressing fixture according to claim 1, characterized in that: The pressurizing mechanism includes a servo motor, a transmission gear, two driven gears, two driving gears, and four brake gears. The servo motor is located on the outside of the mounting base. The transmission gear, two driven gears, two driving gears, and four brake gears are all rotatably mounted inside the mounting base. The motor shaft of the servo motor is connected to the transmission gear. The two sides of the transmission gear mesh sequentially with the driven gears, driving gears, and two brake gears. One end of the ball screw is connected to the brake gear.
3. The chemical forming cold pressing fixture according to claim 1, characterized in that: Two guide posts are arranged opposite each other on the inner side of the side plate. The pressure buffer plate is movably mounted on the two guide posts. A buffer spring sleeved on the guide posts is installed between the pressure buffer plate and the side plate.
4. The chemical forming cold pressing fixture according to claim 1, characterized in that: The extrusion structure includes an extrusion seat, a first extrusion block, a second extrusion block, and two tension springs. The extrusion seat is detachably mounted on a lifting cooling plate. The first extrusion block and the second extrusion block are respectively movably disposed on the left and right sides of the extrusion seat. The upper parts of the first extrusion block and the second extrusion block are rotatably connected to the extrusion seat. The middle parts of the first extrusion block and the second extrusion block protrude to both sides, and tension springs are respectively provided between them and the extrusion seat.
5. A chemical forming cold pressing fixture according to claim 4, characterized in that: The lifting cooling plate has several mounting holes in the same row, and the extrusion seat of the extrusion structure can be detachably installed on the mounting holes through the connecting column at the bottom.