A step-by-step re-pressing device for negative current collector of LR20 alkaline battery

Abstract

The utility model relates to battery manufacturing equipment technical field especially relates to a LR20 alkaline battery negative pole current collector's step -by -step compound pressure device, including frame, is provided with laser detection coaxality mechanism, servo primary pressure equipment mechanism, servo engrave limit mechanism and servo secondary compound pressure mechanism respectively on the frame, and laser detection coaxality mechanism includes laser positioning sensor, servo motor no.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing equipment technology, specifically to a step-by-step re-voltage device for the negative electrode current collector of an LR20 alkaline battery. Background Technology

[0002] Traditional alkaline batteries typically use polypropylene (PP) sealing rings to ensure battery tightness during use. PP's good elasticity and appropriate hardness allow for a tight fit between the current collector and the sealing ring through a single press-fit, effectively preventing leakage. However, with technological advancements, new materials such as nylon 610 are gradually becoming a potential choice in battery manufacturing due to their superior mechanical properties and temperature resistance. While nylon 610 has a high modulus of elasticity and resilience, these characteristics contribute to improved strength and durability. However, they also lead to gaps of 0.05-0.1 mm in the sealing ring during a single press-fit process, affecting the sealing effect and increasing the risk of battery leakage.

[0003] To address this issue, some innovative solutions have emerged in existing technologies. For example, patent CN104966853A improves sealing performance by controlling the moisture content of the sealing ring and the pressure of the explosion-proof valve, successfully enhancing the sealing performance of traditional sealing rings. However, this technology does not solve the problem of compatibility with assembly processes after material upgrades. The use of new materials such as Nylon 610 has made gap problems during assembly more prominent, and existing assembly technologies cannot fully adapt to the characteristics of these new materials, resulting in ineffective improvements in sealing performance, assembly accuracy, and other aspects. No solutions have yet been proposed to address these technical problems. Utility Model Content

[0004] To address the problems in related technologies, this utility model proposes a step-by-step re-voltage device for the negative electrode current collector of LR20 alkaline batteries, which overcomes the aforementioned technical problems existing in the prior art. The purpose of this utility model is to effectively improve the safety and reliability of the battery, solve the problem of improper assembly caused by the high elastic sealing ring, protect the surface of the battery current collector, reduce battery performance degradation caused by surface damage, thereby extending the cycle life of the battery, improving the production efficiency of the production line, and reducing manufacturing costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a step-by-step pressing device for the negative electrode current collector of an LR20 alkaline battery, comprising a frame, on which a laser detection coaxiality mechanism, a servo initial pressing mechanism, a servo marking and limiting mechanism, and a servo secondary pressing mechanism are respectively arranged. The laser detection coaxiality mechanism includes a laser positioning sensor, a first servo motor, and a positioning head. Two first servo motors are provided and symmetrically arranged. Both the first servo motor and the laser positioning sensor are mounted on the frame, and the positioning head is mounted on the output end of the first servo motor. The first servo pressing mechanism and the second servo pressing mechanism each include a second servo motor, a pressing head, and a buffer pad. The second servo motor is mounted on the frame, the pressing head is mounted on the output end of the second servo motor, and the buffer pad is disposed on the pressing head. The servo marking and limiting mechanism includes a third servo motor and a limiting head. The third servo motor is mounted on the frame, and the limiting head is mounted on the output end of the third servo motor.

[0006] Preferably, a feeding conveyor is provided on one side of the frame, and a discharging conveyor is provided on one side of the feeding conveyor.

[0007] Preferably, the cushioning pad is made of polyurethane material, and the hardness of the cushioning pad is 60-70 Shore A.

[0008] Preferably, the frame is provided with a frustum, and the frustum has a plurality of circular openings.

[0009] Preferably, the frame is made of metal.

[0010] Preferably, the laser detection coaxiality mechanism, the servo initial pressing mechanism, the servo marking and limiting mechanism, and the servo secondary pressing mechanism are all provided in two sets.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention relates to a step-by-step repressing device for the negative electrode current collector of an LR20 alkaline battery. By incorporating a laser-detected coaxiality mechanism, a servo-driven initial pressing mechanism, a servo-driven limit marking mechanism, and a servo-driven secondary repressing mechanism, it solves the assembly misalignment problem caused by existing high-elasticity sealing rings, significantly reducing the risk of battery leakage by 90% and effectively improving battery safety and reliability. Simultaneously, the contact resistance is controlled within ≤5mΩ, ensuring stable battery performance under high load conditions. The high-current discharge stability of the battery is improved by 15%, resulting in superior performance in high-power applications. By incorporating a buffer pad 7, the plating damage rate of the current collector is reduced to <0.1%, effectively protecting the battery current collector surface and reducing battery performance degradation caused by surface damage, thereby extending the battery's cycle life. This not only improves production line efficiency but also reduces manufacturing costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the coaxiality detection mechanism of this utility model;

[0015] Figure 3 This is a schematic diagram of the servo-driven initial pressing mechanism of this utility model;

[0016] Figure 4 This is a schematic diagram of the servo-guided marking and positioning mechanism of this utility model;

[0017] Figure 5 This is a schematic diagram of the servo secondary pressure mechanism of this utility model.

[0018] In the attached diagram, the following are the reference numerals: 1. Frame; 2. Laser positioning sensor; 3. Servo motor one; 4. Positioning head; 5. Servo motor two; 6. Pressure head; 7. Buffer pad; 8. Servo motor three; 9. Limit head; 10. Feed conveyor; 11. Discharge conveyor; 12. Frustum. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] Example

[0021] Please see Figure 1-5This invention proposes a technical solution for a step-by-step re-pressing device for the negative electrode current collector of an LR20 alkaline battery: A step-by-step re-pressing device for the negative electrode current collector of an LR20 alkaline battery includes a frame 1. The frame 1 is respectively equipped with a laser coaxiality detection mechanism, a servo initial pressing mechanism, a servo limiting mechanism, and a servo secondary re-pressing mechanism. The laser coaxiality detection mechanism includes a laser positioning sensor 2, a servo motor 3, and a positioning head 4. Two servo motors 3 are provided and symmetrically arranged. Both the servo motors 3 and the laser positioning sensor 2 are mounted on the frame 1. The positioning head 4 is mounted on the output end of the servo motor 3. Specifically, the frame 1 provides support. The laser positioning sensor 2 (accuracy ±0.01mm) calibrates the coaxiality between the current collector and the sealing ring in real time to prevent lateral displacement that could lead to plating peeling. Starting the servo motor 3 moves the positioning head 4, providing guidance. The laser positioning sensor 2 provides real-time feedback of offset data, driving the pressing head 6 to dynamically adjust its position, with deviation control <0.02mm. The servo initial pressing mechanism and the servo secondary re-pressing mechanism... Each pressing mechanism includes a servo motor 5, a pressing head 6, and a buffer pad 7. The servo motor 5 is mounted on the frame 1, the pressing head 6 is mounted on the output end of the servo motor 5, and the buffer pad 7 is placed on the pressing head 6. Specifically, the buffer pad 7 can disperse local stress and prevent damage to the nickel plating layer of the current collector. The servo-driven initial pressing mechanism performs the initial pressing, using the pressing head 6 driven by the servo motor 5 to apply a stepped, gradually increasing pressure of 5 kN (rate ≤ 0.5 kN / s) to initially embed the current collector into the nylon 610 sealing ring; after the initial pressing, a delay of 0... 0.5-1 seconds, the servo secondary pressure mechanism achieves pressure re-pressurization, applying pulse pressure (peak value 8-10kN, pulse width 50ms) to eliminate the rebound gap of the sealing ring. Through the combination of stepped pressing and pulse pressure re-pressurization, and adapted to the high resilience of nylon 610, the sealing surface fit is ensured to be ≥99%. The servo marking and limiting mechanism includes a servo motor 8 and a limiting head 9. The servo motor 8 is mounted on the frame 1, and the limiting head 9 is mounted on the output end of the servo motor 8. Specifically, starting the servo motor 8 drives the limiting head 9 to move and limit the workpiece.

[0022] Please see Figure 1 As shown, a feeding conveyor 10 is further provided on one side of the frame 1, and a discharging conveyor 11 is provided on one side of the feeding conveyor 10.

[0023] In this embodiment, the feeding conveyor 10 and the discharging conveyor 11 convey the workpiece, thereby achieving automation and reducing manual operation.

[0024] Furthermore, the cushioning pad 7 is made of polyurethane material, and the hardness of the cushioning pad 7 is 60-70 Shore A.

[0025] In this embodiment, the buffer pad 7 disperses local stress and prevents damage to the nickel plating layer of the current collector.

[0026] Please see Figure 1 As shown, further, a frustum 12 is provided on the frame 1, and the frustum 12 has several circular openings.

[0027] Furthermore, the frame 1 is made of metal.

[0028] In this embodiment, the frame 1 is made of aluminum alloy to extend its service life.

[0029] Please see Figure 1 As shown, furthermore, the laser detection coaxiality mechanism, the servo initial pressing mechanism, the servo marking limit mechanism, and the servo secondary pressing mechanism are all provided in two sets.

[0030] The working principle of this utility model:

[0031] During processing, the sealing ring is pre-treated by drying (80-100℃) and dry ice treatment (holding at -50℃ for 30 seconds) to reduce residual stress on the surface. The initial pressing is achieved by a servo-driven initial pressing mechanism. After the current collector is positioned by a laser detection coaxiality mechanism, the pressure head 6 loads 5kN at a rate of 0.5kN / s to complete the initial embedding. It is then limited by a servo-driven limit mechanism, and then a secondary pressing is achieved by a servo-driven secondary pressing mechanism. After a delay of 0.8 seconds, a pulse pressure of 9kN peak value is applied and lasts for 50ms to eliminate the springback gap. Finally, quality inspection is carried out. X-ray imaging equipment is used to detect the integrity of the sealing surface, and defective products with a fit of <99% are automatically rejected.

[0032] This invention, through its assembly method, significantly reduces the risk of battery leakage by 90%, effectively improving battery safety and reliability. Simultaneously, contact resistance is controlled within ≤5mΩ, ensuring stable battery performance under high load conditions. High-current discharge stability is improved by 15%, resulting in superior performance in high-power applications. By incorporating a buffer pad 7, the plating damage rate of the current collector is reduced to <0.1%, effectively protecting the current collector surface and reducing battery performance degradation caused by surface damage, thereby extending battery cycle life. This not only improves production line efficiency but also reduces manufacturing costs.

[0033] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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 utility model.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stepwise repulser for negative current collector of LR20 alkaline battery, characterized in that, The system includes a frame (1), on which are respectively provided a laser detection coaxiality mechanism, a servo initial pressing mechanism, a servo marking and limiting mechanism, and a servo secondary pressing mechanism. The laser detection coaxiality mechanism includes a laser positioning sensor (2), a servo motor (3), and a positioning head (4). There are two servo motors (3) arranged symmetrically. Both the servo motors (3) and the laser positioning sensor (2) are mounted on the frame (1). The positioning head (4) is mounted on the output end of the servo motor (3). The servo primary pressing mechanism and the servo secondary pressing mechanism both include a second servo motor (5), a pressing head (6), and a buffer pad (7). The second servo motor (5) is mounted on the frame (1), the pressing head (6) is mounted on the output end of the second servo motor (5), and the buffer pad (7) is mounted on the pressing head (6). The servo marking and limiting mechanism includes a third servo motor (8) and a limiting head (9). The third servo motor (8) is mounted on the frame (1), and the limiting head (9) is mounted on the output end of the third servo motor (8).

2. A stepwise re-pressing device for negative current collector of LR20 alkaline battery according to claim 1, characterized in that: A feeding conveyor (10) is provided on one side of the frame (1), and a discharging conveyor (11) is provided on one side of the feeding conveyor (10).

3. A stepwise re-pressing device for negative current collector of LR20 alkaline battery according to claim 1, characterized in that: The cushioning pad (7) is made of polyurethane material and has a hardness of 60-70 Shore A.

4. The stepwise re-pressing device for negative current collector of LR20 alkaline battery according to claim 1, characterized in that: A frustum (12) is provided on the frame (1), and the frustum (12) has several circular openings.

5. The stepwise re-pressing device for negative current collector of LR20 alkaline battery according to claim 1, characterized in that: The frame (1) is made of metal.

6. A stepwise re-pressing device for negative current collector of LR20 alkaline battery according to claim 1, characterized in that: The laser detection coaxiality mechanism, servo initial pressing mechanism, servo marking and limiting mechanism, and servo secondary pressing mechanism are all provided in two sets.

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