Hot-pressing formation clamp device for solid-state battery

Abstract

The utility model relates to the technical field of battery production, and discloses a solid-state battery hot-pressing formation clamp device which comprises a supporting mechanism, a driving mechanism and a pressing plate mechanism, a plurality of groups of supporting rods are arranged in the supporting mechanism; the driving mechanism comprises a driving module, a gear module and a lead screw module; the plate pressing mechanism comprises a movable plate, a plurality of groups of layer plates and a pressure sensing assembly which are arranged in the supporting mechanism from top to bottom; a plurality of groups of buffer pieces are arranged in the pressure sensing assembly; and a plurality of groups of guide columns which are symmetrically distributed are arranged between the layer plate and the supporting mechanism. The gear module adopts a driving gear, a transition gear and a driven gear which are integrally machined by alloy steel materials, and a ball-type lead screw module and a lead screw bearing are also used, so that the efficient transmission of the device is realized, the energy loss is reduced, and the gear module can stably operate in a high-pressure working environment, and the service life of the device is prolonged. And the abrasion and damage phenomena caused by small gear modulus are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery production, especially to a solid-state battery hot-pressing formation clamp device. BACKGROUND

[0002] With the progress of science and technology and the application of electronic equipment, lithium batteries have been applied in various aspects of life. The production and manufacturing process of sheet-shaped lithium batteries generally includes the following processes: stirring, coating, cutting, winding (or stacking), liquid injection, formation, hot pressing, and constant volume. Among them, formation is a very key process to improve the electrical performance of lithium batteries. Formation is a process of activating the active material inside the battery by passing a proper low current through the electrodes of the initially formed battery.

[0003] In the field of lithium battery manufacturing, the hot-pressing formation clamp device is one of the key production equipment. The formation hot-pressing equipment is mainly used for producing battery cells, which mainly includes hot-pressing formation clamps, layer clamps, and heating devices, etc. The hot-pressing formation clamp has multiple layers of layer plates and multiple layers of aging plates, and one layer plate corresponds to one aging plate. For example, the Chinese patent document with publication number CN108054455A, entitled "Formation Hot-pressing Equipment", mentions "including: a support, a layer plate, an aging plate, a heating device, a clamp pressure plate, and a power mechanism; the layer plate is fixed on the support, the heating device is used for heating the layer plate, the layer plate is used for supporting the aging plate, the aging plate is used for clamping the battery cell, the power mechanism is used for driving the clamp pressure plate to move, so as to tightly press the clamp pressure plate on the aging plate or loosen the clamp pressure plate from the aging plate, the layer plate is provided with rolling bodies for supporting the aging plate, and the layer plate is also provided with two guide strips for cooperating with the left and right sides of the aging plate". This structure solves the problems of poor production quality of battery cells and low service life of the equipment. However, the gear modulus of the gear box of the above-mentioned hot-pressing formation clamp device is small in a high-pressure working environment, the gear bending fatigue strength cannot meet the production requirements, the wear between the gear sets is easily aggravated, and even the phenomenon of gear damage occurs. Moreover, the maximum pressure of the existing hot-pressing formation clamp device is generally not more than 10 tons, especially when producing high-performance and high-capacity lithium batteries, the internal pole pieces of the battery may not be fully attached due to insufficient pressure, resulting in low battery performance.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. UTILITY MODEL CONTENT

[0005] Therefore, the utility model mainly aims at providing a solid-state battery hot-pressing formation clamp device to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A solid-state battery hot-pressing formation fixture includes a support mechanism, a drive mechanism, and a pressure plate mechanism. The support mechanism contains multiple sets of circumferentially distributed support rods. The drive mechanism includes a drive module, a gear module, and a lead screw module. The drive module is located at the top of the support mechanism and drives the gear module to rotate. The gear module is located within the support mechanism and connected to the output end of the drive module, driving the lead screw module to rotate. The lead screw module is located within the support mechanism, connected to the gear module, and situated inside the support rods. The pressure plate mechanism includes... The support mechanism includes a movable plate, multiple sets of shelves, and a pressure sensing component arranged from top to bottom. The movable plate is movably mounted on the lead screw module and can reciprocate along the extension direction of the lead screw module. The pressure sensing component is located at the bottom of the support mechanism and is used to detect the pressure of the movable plate clamping the shelves. The pressure sensing component contains multiple sets of buffer elements for cushioning. Multiple sets of shelves are arranged between the movable plate and the pressure sensing component and are used for clamping the battery. Multiple sets of symmetrically distributed guide columns are provided between the shelves and the support mechanism.

[0008] As further explained, the gear module includes a driving gear, a transition gear, and a driven gear; the driving gear is fixedly mounted on the output end of the drive mechanism; the transition gear is rotatably mounted in the support mechanism and meshes with the driving gear; the driven gear is fixedly mounted on the input end of the lead screw module and meshes with the transition gear.

[0009] As further explained, the driving gear, intermediate gear, and driven gear are all integrally machined from alloy steel.

[0010] As further explained, multiple sets of the aforementioned shelves are evenly spaced between the movable plate and the pressure sensing component; the shelves are integrally manufactured from aluminum alloy material.

[0011] As further explained, the buffer element is a compression spring, which is integrally machined from alloy steel material.

[0012] As further explained, the lead screw module includes a lead screw and a ball bearing sleeve; the lead screw is rotatably connected to the support mechanism, and a lead screw bearing is provided between the lead screw and the support mechanism; the ball bearing sleeve is slidably connected to the lead screw, and the ball bearing sleeve is fixedly connected to the movable plate.

[0013] As further explained, the drive module includes a drive motor and a reducer; the drive motor is located at the center of the top of the support mechanism; the reducer is located at the bottom of the drive motor and is connected to the output end of the drive motor; the reducer is connected to the gear module.

[0014] As further explained, the layer plate is provided with two sets of symmetrically distributed guide sleeves, which are sleeved on the guide posts; a clamping element is provided between the guide sleeves and the layer plate to ensure close contact between the probe, the tabs and the charging / discharging power supply; at least two sets of equally spaced battery guide blocks are provided at the top of the layer plate; and a heating element and a temperature sensor are connected to the bottom of the layer plate.

[0015] As further explained, the pressure sensing assembly includes a first mounting plate, a second mounting plate, and a pressure sensor; the first mounting plate and the second mounting plate are distributed vertically at the bottom end of the support mechanism, and multiple sets of buffer components are located between the first mounting plate and the second mounting plate; multiple sets of guide rods are provided between the first mounting plate and the second mounting plate; the pressure sensor is located between the second mounting plate and the support mechanism.

[0016] As further explained, heat insulation plates are provided between the layer plate and the pressure sensing component and the movable plate respectively; a fixed rod is provided on the support mechanism, and at least two sets of position sensors for position detection are provided on the fixed rod.

[0017] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0018] 1. The gear module uses a single-piece machining process of alloy steel for the driving gear, intermediate gear, and driven gear. Compared with traditional materials, alloy steel has higher strength and hardness, and can withstand greater pressure and torque, enabling the device to withstand a maximum pressure of 100 tons. It also uses an external circulation ball screw module and screw bearings to ensure smooth pressure transmission and precise control, thereby achieving efficient transmission, reducing energy loss, and ensuring stable operation of the gear module under high-pressure working conditions, reducing wear and damage caused by a small gear module.

[0019] 2. The shelves are made of aluminum alloy in one piece, which not only reduces the overall weight but also improves the rigidity and strength of the shelves. At the same time, the multiple shelves are segmented, which facilitates maintenance and replacement after wear and tear, simplifies the replacement process, and improves the efficiency of shelf maintenance and replacement.

[0020] 3. The compression spring is made of alloy steel in one piece, which can effectively withstand the large pressure and possible impact load generated during operation. Compared with some ordinary carbon steel, its strength and toughness are better, which can effectively prevent the compression spring from deforming and breaking during long-term use, thus improving the reliability and stability of the compression spring. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the overall structure of a solid-state battery hot-pressing formation fixture device provided by this utility model;

[0023] Figure 2 A schematic diagram of the overall structure of the support mechanism provided by this utility model;

[0024] Figure 3 A schematic diagram of the overall structure of the drive mechanism provided by this utility model;

[0025] Figure 4 A schematic diagram of the overall structure of the shelf provided by this utility model;

[0026] Figure 5 A schematic diagram of the overall structure of the pressure sensing component provided by this utility model.

[0027] The following are the labeling elements in the figure:

[0028] 10. Support mechanism; 11. Support rod; 12. Guide column; 13. Heat insulation plate; 14. Fixing rod; 15. Position sensor; 21. Drive module; 211. Drive motor; 212. Reducer; 22. Gear module; 221. Drive gear; 222. Transition gear; 223. Driven gear; 23. Lead screw module; 231. Lead screw; 232. Ball bearing nut sleeve; 233. Lead screw bearing; 31. Movable plate; 32. Shelf; 321. Guide sleeve; 322. Clamping component; 323. Battery guide block; 324. Heating component; 325. Temperature sensor; 33. Pressure sensing assembly; 331. Buffer component; 332. First mounting plate; 333. Second mounting plate; 334. Pressure sensor; 335. Guide rod; 40. Battery. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] 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.

[0034] In one embodiment of this utility model, such as Figures 1-4As shown, a solid-state battery hot-pressing formation fixture device is provided, including a support mechanism 10, a drive mechanism, and a pressure plate mechanism; the support mechanism 10 is provided with multiple sets of circumferentially distributed support rods 11; the drive mechanism includes a drive module 21, a gear module 22, and a lead screw module 23; the drive module 21 is located at the top of the support mechanism 10 and is used to drive the gear module 22 to rotate; the gear module 22 is located inside the support mechanism 10 and is connected to the output end of the drive module 21, and is used to drive the lead screw module 23 to rotate; the lead screw module 23 is located inside the support mechanism 10, is connected to the gear module 22, and is located inside the support rods 11; the pressure plate mechanism includes... The support mechanism 10 includes a movable plate 31, multiple sets of shelves 32, and a pressure sensing component 33 arranged from top to bottom. The movable plate 31 is movably mounted on the lead screw module 23 and can reciprocate along the extension direction of the lead screw module 23. The pressure sensing component 33 is located at the bottom of the support mechanism 10 and is used to detect the pressure of the movable plate 31 clamping the shelves 32. The pressure sensing component 33 contains multiple sets of buffer members 331 for cushioning. Multiple sets of shelves 32 are located between the movable plate 31 and the pressure sensing component 33 and are used for clamping the battery. Multiple sets of symmetrically distributed guide posts 12 are provided between the shelves 32 and the support mechanism 10.

[0035] 1. The gear module 22 uses an alloy steel material to integrally machine the driving gear 221, intermediate gear 222, and driven gear 223. Compared with traditional materials, alloy steel has higher strength and hardness, and can withstand greater pressure and torque. It also uses a ball-type screw module 23 and screw bearing 233 to ensure smooth pressure transmission and precise control, thereby achieving efficient transmission of the device, reducing energy loss, and ensuring stable operation of the gear module 22 under high pressure working environment, reducing wear and damage caused by the small gear module.

[0036] 2. Shelves 32 are made of aluminum alloy in one piece, which not only reduces the overall weight but also improves the rigidity and strength of shelves 32. At the same time, multiple shelves 32 are segmented, which facilitates maintenance and replacement after wear and tear, simplifies the replacement process, and improves the efficiency of maintenance and replacement of shelves 32.

[0037] 3. The compression spring is made of alloy steel in one piece, which can effectively withstand the large pressure and possible impact load generated during operation. Compared with some ordinary carbon steel, its strength and toughness are better, which can effectively prevent the compression spring from deforming and breaking during long-term use, thus improving the reliability and stability of the compression spring.

[0038] Meanwhile, by rationally designing the gear module, the bending fatigue strength of the gears is significantly improved, ensuring that the gear set can operate stably under high pressure working conditions and reducing wear and damage caused by the small gear module.

[0039] Preferably, the gear module 22 includes a driving gear 221, a transition gear 222, and a driven gear 223; the driving gear 221 is fixedly mounted on the output end of the drive mechanism; the transition gear 222 is rotatably mounted within the support mechanism 10 and meshes with the driving gear 221; the driven gear 223 is fixedly mounted on the input end of the lead screw module 23 and meshes with the transition gear 222. By setting the driving gear 221, the transition gear 222, and the driven gear 223, the three are meshed together to achieve power transmission, which is transmitted to the lead screw module 23. The lead screw module 23 then drives the movable plate 31 to press multiple sets of layer plates 32 onto the support mechanism 10, achieving the thermal pressing formation of the battery.

[0040] Furthermore, the driving gear 221, the intermediate gear 222, and the driven gear 223 are all integrally machined from alloy steel. In this embodiment, the driving gear 221, the intermediate gear 222, and the driven gear 223 are all made of 40Cr steel. 40Cr steel has high tensile strength, yield strength, and impact toughness, and can withstand the large pressure and possible impact loads generated during the operation of the device. Compared with some ordinary carbon steels, such as Q235 steel, its strength and toughness are superior, which can effectively prevent gears from deforming or breaking during long-term use, thereby improving the reliability and stability of the clamping device.

[0041] Furthermore, multiple sets of the aforementioned shelves 32 are evenly distributed between the movable plate 31 and the pressure sensing component 33; the shelves 32 are integrally manufactured from aluminum alloy. This aluminum alloy shelf 32 possesses characteristics such as lightweight, high strength, and corrosion resistance, allowing the shelf 32 to reduce overall weight while maintaining strength, thus improving the flexibility of the equipment. The evenly distributed distribution ensures uniform force on the battery during clamping, preventing performance degradation due to uneven pressure. Simultaneously, the multiple sets of shelves 32 are segmented, facilitating maintenance and replacement after wear, simplifying replacement procedures, and improving the efficiency of shelf 32 maintenance and replacement.

[0042] Furthermore, the buffer element 331 is a compression spring, which is integrally machined from alloy steel. In this embodiment, the compression spring is made of 52SiCrNiV6 material. 52SiCrNiV6 material has high tensile strength, yield strength, and impact toughness, and can withstand the large pressure and possible impact loads generated by the compression spring during operation. Compared with some ordinary carbon steels, its strength and toughness are superior, which can effectively prevent deformation and breakage of the compression spring during long-term use, thereby improving the reliability and stability of the compression spring. It also has excellent elastic recovery ability, and can quickly return to its original shape after being deformed under large pressure, thus ensuring the stable performance of the compression spring during repeated compression and rebound, effectively reducing shock and buffering vibration.

[0043] Specifically, the lead screw module 23 includes a lead screw 231 and a ball bearing nut sleeve 232; the lead screw 231 is rotatably connected to the support mechanism 10, and a lead screw 231 bearing 233 is provided between the lead screw 231 and the support mechanism 10; the ball bearing nut sleeve 232 is slidably connected to the lead screw 231, and the ball bearing nut sleeve 232 is fixedly connected to the movable plate 31. In this embodiment, the lead screw 231 bearing 233 can be an angular bearing or a tapered bearing, etc., selected according to actual production needs.

[0044] The ball bearing nut sleeve 232 and the lead screw 231 adopt an external circulation connection method, which can withstand a large load. At the same time, the small lead can increase torque and reduce motor power. In addition, the cooperation between the two is characterized by high precision and low friction, ensuring the stability and accuracy of the moving plate 31 during movement. This not only improves the transmission efficiency of the equipment, but also enables the device to withstand greater pressure without excessive wear.

[0045] Furthermore, the drive module 21 includes a drive motor 211 and a reducer 212; the drive motor 211 is located at the center of the top of the support mechanism 10; the reducer 212 is located at the bottom of the drive motor 211 and connected to the output end of the drive motor 211; the reducer 212 is connected to the gear module 22. Through the combined use of the drive motor 211 and the reducer 212, the device can maintain stable power output under high-pressure working conditions, and the reduction effect of the reducer 212 also reduces the motor speed and increases torque output, thereby meeting the high-pressure requirements when producing high-performance, high-capacity lithium batteries.

[0046] Preferably, the shelf 32 is provided with two sets of symmetrically distributed guide sleeves 321, which are sleeved on the guide post 12; a clamping member 322 is provided between the guide sleeve 321 and the shelf 32 to ensure close contact between the probe, the tab, and the charging / discharging power supply; at least two sets of equally spaced battery guide blocks 323 are provided at the top of the shelf 32; a heating element 324 and a temperature sensor 325 are connected to the bottom of the shelf 32, preferably the heating element 324. In this embodiment, the clamping member 322 is a clamping spring or a pressure block, which ensures close contact between the probe, the tab, the charging / discharging power supply and the battery, improving the production quality of the battery. At the same time, by setting the heating element 324 and the temperature sensor 325, the device can perform precise heating and temperature control according to the battery production requirements, further improving the battery performance.

[0047] Specifically, the pressure sensing component 33 includes a first mounting plate 332, a second mounting plate 333, and a pressure sensor 334. The first mounting plate 332 and the second mounting plate 333 are vertically distributed at the bottom of the support mechanism 10, and multiple sets of buffer members 331 are located between the first mounting plate 332 and the second mounting plate 333. Multiple sets of guide rods 335 are provided between the first mounting plate 332 and the second mounting plate 333. The pressure sensor 334 is located between the second mounting plate 333 and the support mechanism 10. By setting the pressure sensor 334, the pressure information between the layers 32 can be fed back in real time, ensuring precise pressure control, improving the automation level of the equipment, and avoiding the problem of low battery performance due to insufficient pressure.

[0048] Preferably, heat insulation plates 13 are provided between the shelf 32 and the pressure sensing component 33 and the movable plate 31, respectively; the support mechanism 10 is provided with a fixing rod 14, and the fixing rod 14 is provided with at least two sets of position sensors 15 for position detection. By setting the heat insulation plates 13, the influence of heat on other parts of the equipment is effectively isolated, protecting the normal operation of the equipment. At the same time, by setting the position sensors 15, the device can monitor the position information of the movable plate 31 and the shelf 32 in real time, ensuring the stability and safety of the equipment, improving the reliability of the equipment, and providing convenience for equipment maintenance and troubleshooting.

[0049] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.

Claims

1. A solid-state battery hot-pressing formation jig device, characterized by, The utility model provides a battery clamping device, including: Supporting mechanism, a plurality of groups of supporting rods are arranged in the supporting mechanism in the circumferential direction; Driving mechanism, the driving mechanism includes drive module, gear module and screw rod module; The drive module is arranged at the top end of the supporting mechanism and is used for driving the gear module to rotate; The gear module is arranged in the supporting mechanism and is connected to the output end of the drive module, and is used to drive the screw rod module to rotate; the screw rod module is arranged in the supporting mechanism and is connected to the gear module and is located on the inner side of the supporting rod; The pressing plate mechanism includes a movable plate arranged in the supporting mechanism from top to bottom, a plurality of groups of layers and a pressure sensing assembly; the movable plate is movably arranged on the screw rod module, and the movable plate can reciprocate along the extension direction of the screw rod module; the pressure sensing assembly is arranged at the bottom end of the supporting mechanism and is used to detect the pressure of the movable plate clamping the layers; a plurality of groups of buffer members for buffering are arranged in the pressure sensing assembly; a plurality of groups of layers are arranged between the movable plate and the pressure sensing assembly and are used for clamping the battery; a plurality of groups of symmetrically distributed guide columns are arranged between the layers and the supporting mechanism.

2. The solid-state battery hot-pressing formation clamp apparatus of claim 1, wherein, The gear module includes a driving gear, a transition gear and a driven gear; the driving gear is fixedly arranged on the output end of the driving mechanism; the transition gear is rotatably arranged in the supporting mechanism and is in meshing connection with the driving gear; the driven gear is fixedly arranged on the input end of the screw rod module and is in meshing connection with the transition gear.

3. The solid-state battery hot-pressing formation clamp apparatus of claim 2, wherein, The driving gear, the transition gear and the driven gear are all integrally processed by using alloy steel material.

4. The solid-state battery hot-pressing formation clamp apparatus of claim 3, wherein, A plurality of groups of layers are equally spaced between the movable plate and the pressure sensing assembly; the layers are integrally processed by using aluminum alloy material.

5. The solid-state battery hot-pressing formation clamp apparatus of claim 4, wherein, The buffer member is a compression spring, which is integrally processed by using alloy steel material.

6. The solid-state battery hot-pressing formation clamp apparatus of claim 1, wherein, The screw rod module includes a screw rod and a ball nut sleeve; the screw rod is rotatably connected to the supporting mechanism, and a screw rod bearing is arranged between the screw rod and the supporting mechanism; the ball nut sleeve is slidably connected to the screw rod, and the ball nut sleeve is fixedly connected to the movable plate.

7. The solid-state battery hot-pressing formation clamp apparatus of claim 6, wherein, The driving mechanism includes a driving motor and a speed reducer; the driving motor is arranged at the top center of the supporting mechanism; the speed reducer is arranged at the bottom end of the driving motor and is connected to the output end of the driving motor; the speed reducer is connected to the gear module.

8. The solid-state battery hot press formation clamp apparatus of claim 1, wherein, Two groups of symmetrically distributed guide sleeves are arranged on the layers, the guide sleeves are sleeved on the guide columns, a pressing member for realizing close contact of the probe, the tab and the charging and discharging source is arranged between the guide sleeve and the layer, at least two groups of equally spaced battery guide blocks are arranged at the top end of the layer, and a heating member and a temperature sensor are connected to the bottom end of the layer.

9. The solid-state battery hot press formation clamp apparatus of claim 1, wherein, The pressure sensing assembly comprises a first mounting plate, a second mounting plate and a pressure sensor; the first mounting plate and the second mounting plate are arranged at the bottom end of the supporting mechanism in an up-down manner, and a plurality of sets of the buffer members are arranged between the first mounting plate and the second mounting plate; a plurality of sets of guide rods are arranged between the first mounting plate and the second mounting plate; the pressure sensor is arranged between the second mounting plate and the supporting mechanism.

10. The solid-state battery hot-pressing formation clamp apparatus of claim 1, wherein, The layer plates are respectively provided with heat insulation plates between the pressure sensing assembly and the movable plate; the supporting mechanism is provided with a fixed rod, and the fixed rod is provided with at least two sets of position sensors for position detection.

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