Flexible intelligent assembly line compatible with multi-specification lithium battery liquid injection

Abstract

The invention relates to the technical field of lithium battery production equipment, and particularly discloses an intelligent assembly line flexibly compatible with multi-specification lithium battery liquid injection. Comprising a rack, a feeding and discharging device, a scanning and weighing device, a liquid injection device, a standing device and a liquid supplementing device, wherein the feeding and discharging device is arranged on the rack and is used for feeding, discharging and transporting a battery; the scanning and weighing device is used for scanning and weighing the battery; the liquid injection device is used for injecting electrolyte into the battery; the glue nail hitting device is used for inserting a glue nail into a liquid injection opening to seal the battery; the moving device is used for transferring the battery to each device; the scanning and weighing device judges whether the electrolyte content of the battery is qualified or not according to weight data of the battery, qualified products are transferred to the electrolyte injection device through the moving device, and unqualified products are transferred to the electrolyte supplementing device through the moving device. All devices of the intelligent assembly line cooperate with one another, the battery electrolyte content can be judged according to the weight, accurate shunting is achieved, efficient production and quality control are achieved, and the intelligent assembly line can be compatible with batteries of multiple specifications.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery production equipment, and in particular discloses an intelligent assembly line that is flexible and compatible with lithium battery injection of multiple specifications. Background Art

[0002] In the field of lithium battery production, with the continuous growth of market demand for lithium batteries and the increasing diversification of application scenarios, higher requirements are placed on the efficiency, quality and compatibility of lithium battery production. There are many problems with traditional lithium battery production lines. In terms of production efficiency, the coordination between the various devices is not close enough, and the process connection is not smooth, resulting in a long production cycle and low production capacity per unit time, which is difficult to meet the needs of large-scale production. In terms of quality control, there is a lack of accurate detection and control means, and it is impossible to accurately weigh and analyze the batteries at multiple key nodes. The injection volume and vacuum degree are not accurately controlled, and the sealing of the glue nails is not accurate, resulting in poor product consistency and low pass rate. In addition, the versatility of traditional assembly lines is insufficient and it is difficult to adapt to the production of batteries of different specifications. Faced with the diverse battery demand in the market, companies often need to invest a lot of money to transform equipment or purchase new equipment, which not only increases production costs, but also reduces the response speed of the production line to market changes. Therefore, it is urgent to develop an efficient, accurate and multi-specification intelligent assembly line that is compatible with batteries. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide an intelligent assembly line that is flexible and compatible with multiple specifications of lithium battery injection.

[0004] To achieve the above-mentioned purpose, the present invention provides a flexible and compatible intelligent production line for lithium battery injection of multiple specifications, including a frame, a loading and unloading device arranged on the frame for loading and unloading and transporting batteries, a scanning and weighing device for scanning and weighing batteries, an injection device for injecting electrolyte into the battery, a static device for providing a static environment for the battery after injection by the injection device, a replenishing device for replenishing electrolyte for the battery, a glue nailing device for inserting glue nails into the injection port to seal the battery, and a mobile device for transferring the battery to each device; the scanning and weighing device determines whether the electrolyte content of the battery is qualified based on the weight data of the battery, and qualified products are transferred to the injection device via the mobile device, and unqualified products are transferred to the replenishing device via the mobile device.

[0005] Furthermore, the loading and unloading device has a belt conveyor line rotatably arranged on a frame and a belt drive that drives the belt conveyor line. The belt conveyor line is provided with a rotating first flexible wheel. The number of the first flexible wheels is set to multiple, and the multiple first flexible wheels are arranged along the conveying direction of the belt conveyor line. The first flexible wheel is used to assist in transporting batteries of different specifications. The belt conveyor line is also provided with a rotating first roller that contacts the belt to support the belt when it rotates.

[0006] Furthermore, the liquid injection device comprises a liquid injection rack arranged on a frame, a liquid injection mechanism is arranged on the liquid injection rack, a liquid injection fixture for reciprocating movement for storing batteries to be injected and a first driving mechanism for driving the liquid injection fixture to reciprocate are arranged on the frame, the liquid injection mechanism is used in conjunction with the liquid injection fixture, the number of liquid injection mechanisms and the number of liquid injection fixtures are both set to multiple, and the multiple liquid injection mechanisms and the multiple liquid injection fixtures are all arranged along the length direction of the liquid injection rack; the static device comprises a static rack, a static mechanism arranged on the static rack, a static fixture for reciprocating movement is arranged on the frame, and a second driving mechanism for driving the static fixture to reciprocate, the static fixture is used to store batteries injected by the liquid injection mechanism, the static mechanism is used in conjunction with the static fixture, the number of static mechanisms and the number of static fixtures are both set to multiple, and the multiple static mechanisms and the multiple static fixtures are all arranged along the length direction of the static rack; the liquid injection rack and the static rack are arranged in parallel.

[0007] Furthermore, the liquid injection mechanism comprises a support frame which is reciprocatingly arranged on the liquid injection frame, the first driving mechanism drives the support frame to reciprocate, the support frame is provided with a liquid injection cup, a liquid injection needle which is reciprocatingly arranged, a first driving assembly which drives the liquid injection needle to reciprocate, a reciprocating vacuum pumping assembly and a second driving assembly which drives the vacuum pumping assembly to reciprocate, the liquid injection cup comprises a accommodating chamber for accommodating electrolyte, a liquid injection input port for communicating with the liquid injection needle and a liquid injection output port for communicating with the liquid injection port of the battery, the liquid injection input port is connected with the liquid injection output port via the accommodating chamber, the air extraction pipe of the vacuum pumping assembly extends into the accommodating chamber, the liquid injection needle is connected with the accommodating chamber via the liquid injection input port; the second driving assembly The first driving component drives the vacuum pumping component to drive the vacuum pipe to move in the accommodating chamber to control the connection and disconnection between the vacuum pipe and the liquid injection port of the battery. The first driving component drives the liquid injection needle to reciprocate to control the connection and disconnection between the liquid injection needle and the liquid injection input port and further control the connection and disconnection between the liquid injection needle and the liquid injection output port. The reciprocating vacuum pumping component and the reciprocating liquid injection needle are used to automatically inject liquid after the battery is vacuumed. A third driving component is arranged on it, and the output end of the third driving component is connected to the supporting frame. A telescopic spring is arranged on the liquid injection cup. The two ends of the telescopic spring are respectively in contact with the supporting frame and the liquid injection cup. The third driving component drives the supporting frame to compress the telescopic spring to drive the liquid injection output port of the liquid injection cup to be connected with the liquid injection ports of batteries of different specifications.

[0008] Furthermore, the scanning weighing device has a first weighing component, a second weighing component, a third weighing component and a scanning component used in conjunction with the weighing component, the first weighing component is used to weigh the batteries loaded by the loading and unloading device, the second weighing component is used to weigh the batteries after the static device has been stationary, and the third weighing component is used to weigh the batteries after the liquid replenishing device has been replenished, and the weighing component feeds back the weighing data of the battery to the scanning component.

[0009] Furthermore, the weighing assembly comprises a weighing frame, a carrying plate reciprocatingly arranged on the weighing frame, and a first driving cylinder driving the carrying plate to reciprocate; a weighing machine, a rotatable roller conveyor line, and a driving motor for driving the roller conveyor line to rotate are arranged on the carrying plate; a pad is arranged on the weighing machine, and a limiting protrusion used in conjunction with the roller conveyor line is arranged on the pad; the first driving cylinder drives the carrying plate to drive the weighing machine to reciprocate, and the weighing machine makes the limiting protrusion pass through the roller conveyor line via the pad, thereby lifting the battery for weighing; two second driving cylinders are arranged in parallel on the carrying plate, and the two second driving cylinders are located on both sides of the roller conveyor line; a limiting plate is arranged at the driving end of the second driving cylinder, and a flexible layer is arranged on the limiting plate, and the two second driving cylinders drive the limiting plates to drive the flexible layers to approach each other to achieve the limitation of the batteries on the roller conveyor line; a plurality of limiting wheels are rotatably installed on the roller conveyor line, and the plurality of limiting wheels are arranged along the conveying direction of the roller conveyor line.

[0010] Furthermore, the moving device comprises a first moving component, a second moving component and a third moving component arranged on the frame, the first moving component is used to transfer the battery detected by the scanning and weighing device to the liquid injection device, and to transfer the battery that has been left to rest in the resting device to the loading and unloading device; the second moving component is used to move the defective battery detected by the scanning and weighing device to the liquid replenishing device for liquid replenishment, and the third moving component is used to transfer the battery that has been left to rest in the loading and unloading device to the gluing nailing device; the moving component comprises a first linear motor module arranged on the frame, a second linear motor module arranged on the first linear motor module for reciprocating motion, a third linear motor module arranged on the second linear motor module for reciprocating motion, and a clamping jaw assembly arranged on the third linear motor module for reciprocating motion, and a flexible block is provided on the clamping jaw of the clamping jaw assembly.

[0011] Furthermore, the frame is provided with a first mobile trolley for reciprocating motion, a first driver for driving the first mobile trolley for reciprocating motion, a second mobile trolley for reciprocating motion, and a second driver for driving the second mobile trolley for reciprocating motion. The first driver drives the first mobile trolley to transfer the batteries that have passed the inspection of the scanning and weighing device to the liquid injection device, and the second driver drives the second mobile trolley to transfer the batteries after the liquid injection device is injected to the static device.

[0012] Furthermore, the gluing nail device comprises a gluing nail rack arranged on a frame, the gluing nail rack is provided with a reciprocating nail magazine assembly, a gluing drive assembly for pushing the glue nails in the nail magazine assembly to the liquid filling port of the battery, and a glue nail vibrating plate for use in conjunction with the nail magazine assembly, the glue nail vibrating plate arranges the messy glue nails in order and transports them to the nail magazine assembly.

[0013] Furthermore, a defective product temporary storage line is provided on the frame, and the moving device transfers the defective batteries detected as unqualified by the scanning and weighing device to the defective product temporary storage line, and the liquid injection device performs liquid replenishing operations on the defective batteries in the defective product temporary storage line; the number of defective product temporary storage lines is set to multiple, and the multiple defective product temporary storage lines are arranged in parallel, and the defective product temporary storage line has a temporary storage rack arranged on the frame, a second roller and a second flexible wheel rotatably arranged on the temporary storage rack, the number of the second rollers and the number of the second flexible wheels are both set to multiple, and the multiple second rollers and the multiple second flexible wheels are arranged along the length direction of the defective product temporary storage line, the second roller is used to support the bottom of the defective battery, and the second flexible wheel is used to limit and assist defective batteries of different specifications.

[0014] Beneficial effects of the present invention: Efficient production: All devices work closely together, and the loading and unloading devices use the first flexible wheel and the first roller to stably transport the batteries; multiple mechanisms of the injection, static and other devices operate in parallel, and the mobile trolley and mobile components quickly and accurately transfer the batteries, achieving seamless connection of each process, greatly shortening the production cycle, improving the production capacity per unit time, and meeting large-scale production needs.

[0015] Precise quality control: The scanning weighing device weighs and feeds back data at multiple key nodes, providing a basis for operations such as injection and refilling; the injection mechanism accurately controls the injection volume and vacuum degree; the glue nail device accurately glues and seals to ensure that the battery electrolyte content meets the standard and the seal is good, thereby improving product consistency and qualification rate.

[0016] Strong compatibility, adaptable to various specifications of batteries: The flexible wheels of the transport line, the telescopic springs of the filling cup, the mobile component clamps and other designs can automatically adjust and adapt according to different specifications of batteries; without complicated modifications, it can handle products of various specifications, reduce the company's equipment replacement costs, and allow the production line to respond quickly to market changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of an intelligent assembly line that is flexible and compatible with multiple specifications of lithium battery injection according to the present invention; Figure 2 It is a schematic diagram of the first partial structure of the present invention; Figure 3 It is a schematic diagram of a second partial structure of the present invention; Figure 4 It is a schematic diagram of a third partial structure of the present invention; Figure 5 It is a structural schematic diagram of the liquid injection mechanism and the liquid injection fixture of the present invention; Figure 6 It is a structural schematic diagram of the liquid injection mechanism of the present invention; Figure 7 is a cross-sectional view of the liquid injection cup of the present invention; Figure 8 It is a structural schematic diagram of the first weighing assembly of the present invention; Fig. 9 It is a partial structural schematic diagram of the first weighing assembly of the present invention; Fig.10 It is a structural schematic diagram of the belt conveyor line and the scanning assembly of the present invention; Fig.11 It is a structural schematic diagram of the defective product temporary storage line of the present invention; Fig.12 It is a schematic structural diagram of the clamping jaws of the present invention.

[0018] The reference numerals include: 1, frame; 2, loading and unloading device; 21, belt conveyor line; 22, belt drive; 23, first flexible wheel; 24, first roller; 3, scanning weighing device; 31, first weighing assembly; 311, weighing frame; 312, bearing plate; 313, first driving cylinder; 314, weighing device; 315, roller conveyor line; 316, driving motor; 317, pad; 318, limiting protrusion; 319, second driving moving cylinder; 3111, limiting plate; 3112, flexible layer; 3113, limiting wheel; 32, second weighing assembly; 33, third weighing assembly; 34, scanning assembly; 4, liquid injection device; 41, liquid injection rack; 42, liquid injection mechanism; 421, carrier rack; 422, liquid injection cup; 4221, accommodating chamber; 4222, liquid injection input port; 4223, liquid injection output port; 423, liquid injection needle; 424, first driving assembly; 425, Vacuuming assembly; 426, second driving assembly; 427, third driving assembly; 428, telescopic spring; 43, liquid injection fixture; 44, first driving mechanism; 5, static device; 51, static frame; 52, static fixture; 53, second driving mechanism; 6, liquid replenishing device; 7, glue nail device; 71, glue nail frame; 72, nail magazine assembly; 73, glue driving assembly; 74, glue nail vibration plate; 8, moving device; 81, first moving group Parts; 811, first linear motor module; 812, second linear motor module; 813, third linear motor module; 814, clamping jaw assembly; 815, flexible block; 82, second moving assembly; 83, third moving assembly; 9, first moving trolley; 11, first drive; 12, second moving trolley; 13, second drive; 14, temporary storage line for defective products; 141, temporary storage rack; 142, second roller; 143, second flexible wheel. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0020] See also Figures 1 to 12As shown, the present invention is a flexible and compatible intelligent production line for lithium battery injection of multiple specifications, including a frame 1, a loading and unloading device 2 arranged on the frame 1 for loading and unloading and transporting batteries, a scanning and weighing device 3 for scanning and weighing batteries, an injection device 4 for injecting electrolyte into the battery, a static device 5 for providing a static environment for the battery after injection by the injection device 4, a replenishing device 6 for replenishing electrolyte for the battery, a glue nailing device 7 for inserting glue nails into the injection port to seal the battery, and a moving device 8 for transferring the battery to each device; the scanning and weighing device 3 determines whether the electrolyte content of the battery is qualified based on the weight data of the battery, and the qualified products are transferred to the injection device 4 via the mobile device 8, and the unqualified products are transferred to the replenishing device 6 via the mobile device 8.

[0021] In actual use, it integrates multiple functions such as loading and unloading, scanning and weighing, liquid injection, static, liquid replenishment, and glue nailing. Each device works in coordination through the mobile device 8 to realize the full process of automated production of batteries from feeding to finished products, greatly improving production efficiency, reducing manual intervention, and reducing labor costs. The scanning and weighing device 3 can accurately determine whether the battery electrolyte content is qualified based on the weight data. Qualified products enter the liquid injection stage, and unqualified products are transferred to the liquid replenishment device 6 to ensure that the electrolyte content of each battery meets the standard, improve product quality consistency, and reduce the defective rate. It can adapt to the production needs of lithium batteries of various specifications, and can handle batteries of different sizes and shapes without large-scale modification of the equipment, enhance the versatility of the equipment, reduce the equipment purchase cost of the enterprise, improve the equipment utilization rate, and quickly respond to the market demand for lithium batteries of different specifications.

[0022] Specifically, the loading and unloading device 2 has a belt conveyor line rotatably arranged on the frame 1 and a belt drive 22 that drives the belt conveyor line. The belt conveyor line is provided with a rotating first flexible wheel 23. The number of the first flexible wheels 23 is set to multiple, and the multiple first flexible wheels 23 are arranged along the conveying direction of the belt conveyor line. The first flexible wheel 23 is used to assist in transporting batteries of different specifications. The belt conveyor line is also provided with a rotating first roller 24 that contacts the belt to support the belt when it rotates.

[0023] In actual use, multiple first flexible wheels 23 arranged along the belt conveyor line can adaptively adjust the contact state according to the size and shape of batteries of different specifications. Whether it is a small cylindrical battery or a large square battery, it can be transported smoothly with the assistance of the first flexible wheel 23, which greatly improves the compatibility of the equipment with various types of lithium batteries and meets diversified production needs. During transportation, the first flexible wheel 23 can effectively buffer the impact force generated by vibration and collision of the battery, ensure smooth transportation of the battery, and reduce the risk of battery damage caused by unstable transportation. At the same time, the first roller 24 conflicts with the belt, providing reliable support for the rotation of the belt, preventing the belt from deforming or loosening when transporting heavy-load batteries, and ensuring the continuity and stability of the transportation process. The reasonable design of the first flexible wheel 23 and the first roller 24 reduces the wear between the belt and other components and reduces the occurrence rate of equipment failures. With stable support and flexible assistance, the belt runs more smoothly, reduces the heat and mechanical fatigue generated by abnormal friction, extends the service life of components such as the belt, the first flexible wheel 23 and the first roller 24, and reduces the maintenance cost of the equipment.

[0024] Specifically, the injection device 4 has an injection frame 41 arranged on the frame 1, and an injection mechanism 42 is arranged on the injection frame 41. The frame 1 is provided with an injection fixture 43 for storing batteries to be injected, and a first driving mechanism 44 for driving the injection fixture 43 to reciprocate. The injection mechanism 42 is used in conjunction with the injection fixture 43. The number of injection mechanisms 42 and the number of injection fixtures 43 are both set to multiple, and the multiple injection mechanisms 42 and the multiple injection fixtures 43 are arranged along the length direction of the injection frame 41; the static device 5 has a stationary frame 51 and a stationary mechanism arranged on the stationary frame 51. The frame 1 is provided with a reciprocating stationary fixture 52 and a second driving mechanism 53 for driving the stationary fixture 52 to reciprocate. The stationary fixture 52 is used to store the battery after being injected by the injection mechanism 42. The stationary mechanism and the stationary fixture 52 are used in conjunction with each other. The number of the stationary mechanisms and the number of the stationary fixtures 52 are both set to multiple. The multiple stationary mechanisms and the multiple stationary fixtures 52 are arranged along the length direction of the stationary frame 51. The injection frame 41 and the stationary frame 51 are arranged in parallel.

[0025] In actual use, multiple injection mechanisms 42 and injection fixtures 43 are arranged along the length direction of the injection rack 41, and multiple batteries can be injected at the same time, greatly improving the injection efficiency. Similarly, multiple static mechanisms and static fixtures 52 are arranged along the static rack 51, which can handle multiple static links of batteries after injection at the same time, speed up the production rhythm, and meet the needs of large-scale production. The injection fixture 43 and the static fixture 52 are respectively controlled by corresponding driving mechanisms to achieve precise reciprocating motion to ensure the accuracy and stability of injection and static operations. The coordination between different mechanisms and fixtures makes the flow of batteries between various processes smoother and reduces operational errors. The injection rack 41 and the static rack 51 are arranged in parallel, and the space of the rack 1 is reasonably utilized to make the equipment layout compact and orderly. This layout facilitates the installation, commissioning and maintenance of the equipment, and also provides convenience for the transfer of batteries between different processes, improving the utilization rate of the overall production space. By providing a plurality of injection mechanisms 42, injection fixtures 43, static mechanisms and static fixtures 52, the number of uses can be flexibly adjusted according to different battery specifications and production requirements, thereby enhancing the versatility and adaptability of the equipment to the production of various types of lithium batteries.

[0026] Specifically, the injection mechanism 42 has a carrier frame 421 which is reciprocatingly arranged on the injection frame 41, the first driving mechanism 43 drives the carrier frame 421 to reciprocate, and the carrier frame 421 is provided with an injection cup 422, an injection needle 423 which is reciprocatingly arranged, a first driving component 424 which drives the injection needle 423 to reciprocate, a reciprocating vacuum component 425, and a second driving component 426 which drives the vacuum component 425 to reciprocate, the injection cup 422 has a accommodating chamber 4221 for accommodating electrolyte, an injection input port 4222 for communicating with the injection needle 423, and an injection output port 4223 for communicating with the injection port of the battery, the injection input port 4222 is communicated with the injection output port 4223 via the accommodating chamber 4221, the vacuum pipe of the vacuum component 425 extends into the accommodating chamber 4221, and the injection needle 423 is communicated with the accommodating chamber 4221 via the injection input port 4222; The second driving component 426 drives the vacuum component 425 to drive the vacuum tube to move in the accommodating chamber 4221 to control the connection between the vacuum tube and the battery's injection port. The first driving component 424 drives the injection needle 423 to reciprocate to control the connection between the injection needle 423 and the injection input port 4222 and further control the connection between the injection needle 423 and the injection output port 4223. The reciprocating vacuum component 425 and the reciprocating injection needle 423 are used to automatically inject liquid after the battery is vacuumed. A third driving component 427 is arranged on it, and the output end of the third driving component 427 is connected to the supporting frame 421. The injection cup 422 is provided with a telescopic spring 428. The two ends of the telescopic spring 428 are respectively in contact with the supporting frame 421 and the injection cup 422. The third driving component 427 drives the supporting frame 421 to compress the telescopic spring 428 to drive the injection output port 4223 of the injection cup 422 to be connected with the injection ports of batteries of different specifications.

[0027] In actual use, the vacuum assembly 425 and the injection needle 423 can realize reciprocating motion through the second drive assembly 426 and the first drive assembly 424 respectively. The vacuum assembly 425 is first used to evacuate the inside of the battery, and then the electrolyte is injected into the battery through the injection needle 423. The whole process is completed automatically without excessive human intervention, which greatly improves the injection efficiency and meets the needs of large-scale production. The injection cup 422, the injection needle 423, the vacuum assembly 425 and other multiple components cooperate with each other, and each has an independent drive assembly control, so that each link of the injection process can be carried out accurately and orderly, further improving the automation level and work efficiency of the injection. The first drive assembly 424 controls the connection and disconnection of the injection needle 423 and the injection input port 4222 and the injection output port 4223, and the second drive assembly 426 controls the connection and disconnection of the exhaust pipe and the battery injection port, so that the injection amount and vacuum degree can be accurately controlled to ensure the injection accuracy of each battery and improve the consistency of product quality.

[0028] The telescopic spring 428 mounted on the injection cup 422 can play a buffering role when the third drive component 427 drives the carrier 421 to connect the injection cup 422 to the battery injection port, avoiding damage to the battery or the injection cup 422 due to rigid contact, while ensuring that the injection output port 4223 fits tightly with the battery injection port to prevent electrolyte leakage and improve the stability of the injection process. The third drive component 427 cooperates with the telescopic spring 428 to enable the injection output port 4223 of the injection cup 422 to adapt to the injection ports of batteries of different specifications. When facing batteries of different sizes and shapes, the telescopic spring 428 can adjust the position and angle of the injection cup 422 by compression or extension to ensure that the injection output port 4223 is accurately docked with the battery injection port, thereby enhancing the compatibility of the equipment with lithium batteries of various specifications and reducing the cost of replacing equipment for enterprises.

[0029] Specifically, the scanning weighing device 3 has a first weighing component 31, a second weighing component 32, a third weighing component 33 and a scanning component 34 used in conjunction with the weighing component. The first weighing component 31 is used to weigh the batteries loaded by the loading and unloading device 2, the second weighing component 32 is used to weigh the batteries after being stationary by the stationary device 5, and the third weighing component 33 is used to weigh the batteries after being refilled by the refilling device 6. The weighing components feed back the weighing data of the batteries to the scanning component 34.

[0030] In actual use, the device is weighed at different key nodes of battery production, namely, during loading, after standing, and after rehydration. The initial weight of the loaded battery is obtained by the first weighing component 31, so as to promptly discover whether there are problems such as weight deviation in the incoming battery. The second weighing component 32 weighs the battery after standing, and can detect whether the change in battery weight during injection and standing is in line with expectations, and judge the injection effect. The third weighing component 33 weighs the battery after rehydration to ensure the accuracy of the rehydration amount and to ensure that the final electrolyte content of the battery meets the standard, thereby achieving strict quality control of the entire lithium battery injection production process. Each weighing component feeds back the weighing data to the scanning component 34, and the scanning component 34 can comprehensively analyze the data.

[0031] For example, by comparing the loading weight and the weight after standing, it can be determined whether the injection amount is appropriate; according to the weight change before and after the refilling, the effect of the refilling operation can be accurately evaluated. Based on these precise data, the scanning component 34 can make accurate decisions, such as determining whether the battery is qualified and whether further refilling is needed, thereby improving the intelligence and automation level of the production process. The continuous and accurate weighing and data feedback mechanism enables the assembly line to adjust the operating parameters such as injection and refilling in a timely manner to ensure that the electrolyte content of each battery can be controlled within a reasonable range. This helps to improve product consistency, reduce the problem of uneven battery performance caused by differences in electrolyte content, and thus improve the product qualification rate and enhance the company's market competitiveness.

[0032] Specifically, the weighing assembly comprises a weighing frame, a bearing plate 312 reciprocatingly arranged on the weighing frame, a first driving cylinder 313 driving the bearing plate 312 to reciprocate, a weighing device 314 is arranged on the bearing plate 312, a roller conveyor line 315 rotatably arranged, and a driving motor 316 for driving the roller conveyor line 315 to rotate, a pad 317 is arranged on the weighing device 314, and a limiting protrusion 318 used in conjunction with the roller conveyor line 315 is arranged on the pad 317. The first driving cylinder 313 drives the bearing plate 312 to drive the weighing device 314 to reciprocate, and the weighing device 314 passes through the limiting protrusion 318 of the roller conveyor line via the pad 317. 315, and then lift the battery for weighing; two second driving cylinders 319 are parallelly arranged on the load-bearing plate 312, and the two second driving cylinders 319 are located on both sides of the roller conveyor line 315. The driving end of the second driving cylinder 319 is provided with a limiting plate 3111, and the limiting plate 3111 is provided with a flexible layer 3112. The two second driving cylinders 319 drive the limiting plate 3111 to drive the flexible layer 3112 to approach each other, so as to limit the battery on the roller conveyor line 315; a plurality of limiting wheels 3113 are rotatably installed on the roller conveyor line 315, and the plurality of limiting wheels 3113 are arranged along the conveying direction of the roller conveyor line 315.

[0033] In actual use, the first driving cylinder 313 drives the load-bearing plate 312 to drive the weighing device 314, so that the limiting protrusion 318 on the pad 317 passes through the roller conveyor line 315 to lift the battery for weighing. This design ensures that the battery is in a stable and accurate position every time it is weighed, avoids the interference of the roller conveyor line 315 on the weighing, and greatly improves the accuracy and reliability of the weighing data. The two second driving cylinders 319 located on both sides of the roller conveyor line 315 drive the limiting plate 3111. When limiting the battery, the flexible layer 3112 on the limiting plate 3111 can not only ensure that the battery position is fixed, but also avoid the influence of rigid contact on the weighing result, further improving the weighing accuracy. At the same time, multiple limiting wheels 3113 arranged along the conveying direction can prevent the battery from shifting during the conveying process, ensuring that the battery reaches the weighing position accurately.

[0034] By rationally designing the layout of the limiting protrusion 318 and the moving range of the limiting plate 3111, the weighing assembly can adapt to batteries of different specifications and shapes. The limiting protrusion 318 can effectively support and position the battery, and the limiting plate 3111 and the limiting wheel 3113 can be flexibly adjusted to meet the limiting requirements of batteries of different sizes, thereby improving the compatibility of the equipment with various types of lithium batteries. The roller conveyor line 315 is driven by a drive motor 316, which can achieve smooth transportation of the battery. Batteries of different specifications can move smoothly on the roller conveyor line 315, preparing for subsequent weighing operations and making the entire weighing process smoother. The setting of the flexible layer 3112 on the limiting plate 3111 and the limiting wheel 3113, while ensuring accurate positioning of the battery, reduces damage to the surface of the battery, which is beneficial to ensuring the quality of the battery and reducing the defective rate.

[0035] Specifically, the moving device 8 has a first moving component 81, a second moving component 82 and a third moving component 83 arranged on the frame 1, the first moving component 81 is used to transfer the battery detected by the scanning and weighing device 3 to the injection device 4, and to transfer the battery that has been rested in the resting device 5 to the loading and unloading device 2; the second moving component 82 is used to move the defective battery detected by the scanning and weighing device 3 to the refilling device 6 for refilling, and the third moving component 83 is used to transfer the battery that has been rested in the loading and unloading device 2 to the gluing nail device 7; the moving component has a first linear motor module 811 arranged on the frame 1, a second linear motor module 812 reciprocatingly arranged on the first linear motor module 811, a third linear motor module 813 reciprocatingly arranged on the second linear motor module 812, and a clamping jaw assembly 814 reciprocatingly arranged on the third linear motor module 813, and a flexible block 815 is provided on the clamping jaw of the clamping jaw assembly 814.

[0036] In actual use, the first, second and third moving components 83 have clear division of labor. The first moving component 81 is responsible for transferring qualified batteries between the scanning weighing device 3, the liquid injection device 4, the static device 5 and the loading and unloading device 2; the second moving component 82 specifically handles the unqualified batteries to the liquid replenishing device 6; the third moving component 83 transfers the static batteries to the glue nailing device 7. This division of labor ensures the accurate flow of batteries between different processes, avoids confusion, and improves the operating efficiency of the entire assembly line. Each moving component adopts a combination of the first, second and third linear motor modules 813, so that the clamping claw assembly 814 can move flexibly and accurately in three-dimensional space. Whether it is rapid transfer in the horizontal direction or height adjustment in the vertical direction, it can respond quickly and accurately reach the specified position, greatly improving the speed and accuracy of battery transfer.

[0037] Since the mobile component can flexibly adjust the position and angle, the clamping jaw assembly 814 can be adaptively operated according to the size and shape of batteries of different specifications. For lithium batteries of various sizes and shapes, the clamping jaw assembly 814 can accurately grasp and transfer them, which enhances the compatibility of the entire production line with batteries of various specifications and reduces the cost of replacing equipment due to changes in product specifications. The clamping jaws of the clamping jaw assembly 814 are provided with flexible blocks 815. When grabbing the battery, the flexible blocks 815 can act as a buffer to prevent the clamping jaws from causing hard damage to the battery surface. This is crucial for lithium batteries, which have high requirements for surface integrity. It helps to ensure the quality and performance of the battery, reduce the defective rate, and improve the overall qualified rate of the product.

[0038] Specifically, the frame 1 is provided with a first mobile trolley 9 for reciprocating motion, a first driver 11 for driving the first mobile trolley 9 to reciprocate, a second mobile trolley 12 for reciprocating motion, and a second driver 13 for driving the second mobile trolley 12 to reciprocate, the first driver 11 drives the first mobile trolley 9 to transfer the batteries that have passed the inspection of the scanning and weighing device 3 to the liquid injection device 4, and the second driver 13 drives the second mobile trolley 12 to transfer the batteries after liquid injection from the liquid injection device 4 to the static device 5.

[0039] In actual use, this rapid transfer process reduces the waiting time of the battery between different processes, making the entire production process more compact, greatly improving production efficiency, and meeting the needs of large-scale lithium battery production. The two mobile trolleys can operate independently. While the first mobile trolley 9 transfers qualified batteries, the second mobile trolley 12 can simultaneously transfer the batteries after injection. This parallel operation mode further speeds up the production rhythm and increases the battery processing volume per unit time. The reciprocating motion of the first mobile trolley 9 and the second mobile trolley 12 is controlled by the first driver 11 and the second driver 13 respectively, and the moving position and stroke of the mobile trolley can be accurately controlled. This ensures that the battery can be accurately transferred from one device to the next, avoiding problems such as battery damage or interruption of the production process due to inaccurate transfer position, and improving the stability and reliability of the production process. The design of the mobile trolley can be reasonably adjusted according to the size and weight of batteries of different specifications. Whether it is a small consumer lithium battery or a large power battery, it can be smoothly transferred by the mobile trolley. This enhances the adaptability of the entire assembly line to batteries of different specifications and reduces the cost of replacing equipment for enterprises due to changes in product specifications.

[0040] Specifically, the gluing nail device 7 has a gluing nail rack 71 arranged on the frame 1, and the gluing nail rack 71 is provided with a reciprocating nail magazine assembly 72, a gluing driving assembly 73 for pushing the glue nails in the nail magazine assembly 72 to the liquid filling port of the battery, and a glue nail vibration plate 74 for use in conjunction with the nail magazine assembly 72. The glue nail vibration plate 74 arranges the messy glue nails in order and transports them to the nail magazine assembly 72.

[0041] In actual use, the glue nail vibration plate 74 can arrange the messy glue nails in order and transport them to the nail magazine assembly 72, realizing the automation and orderliness of the glue nail supply. It avoids the tedious process of manually sorting glue nails, saves a lot of time, enables the glue nail link to quickly obtain glue nails, speeds up the production rhythm of the entire assembly line, and increases the battery processing volume per unit time. The glue driving assembly 73 can drive the nail magazine assembly 72 to quickly push the glue nails to the battery's injection port, realizing efficient glue nailing operations. This fast and continuous gluing action is closely coordinated with other processes of the assembly line to ensure that the battery can be sealed in time after completing operations such as injection, thereby improving overall production efficiency.

[0042] The nail magazine assembly 72 reciprocates on the glue nail rack 71, and cooperates with the precise drive of the glue driving assembly 73 to accurately push the glue nails to the battery filling port. This ensures the position accuracy and firmness of the glue nail installation, effectively prevents electrolyte leakage, improves the sealing performance and quality stability of the battery, and reduces the defective rate. The glue nail vibration plate 74 can arrange and transport glue nails of different specifications and shapes in an orderly manner, and the nail magazine assembly 72 and the glue driving assembly 73 can also be adjusted accordingly according to the characteristics of the glue nails. This enables the glue nail device 7 to adapt to the gluing needs of various types of lithium batteries, enhances the compatibility of the entire assembly line with different products, and reduces the cost of equipment replacement for enterprises.

[0043] Specifically, a defective product temporary storage line 14 is provided on the frame 1, and the moving device 8 transfers the defective batteries detected by the scanning and weighing device 3 to the defective product temporary storage line 14, and the liquid injection device 4 performs liquid replenishing operation on the defective batteries on the defective product temporary storage line 14; the number of defective product temporary storage lines 14 is set to multiple, and the multiple defective product temporary storage lines 14 are arranged in parallel. The defective product temporary storage line 14 has a temporary storage rack 141 arranged on the frame 1, a second roller 142 and a second flexible wheel 143 rotatably arranged on the temporary storage rack 141, the number of the second roller 142 and the number of the second flexible wheels 143 are both set to multiple, and the multiple second rollers 142 and the multiple second flexible wheels 143 are arranged along the length direction of the defective product temporary storage line 14, the second roller 142 is used to support the bottom of the defective battery, and the second flexible wheel 143 is used to limit and assist defective batteries of different specifications.

[0044] In actual use, the mobile device 8 transfers the unqualified batteries detected by the scanning and weighing device 3 to the defective product temporary storage line 14, so that the defective products can be stored in a centralized manner. The liquid injection device 4 can uniformly perform liquid replenishment operations on the defective products on the temporary storage line, avoiding the disorderly flow of defective products in the assembly line to interfere with normal production, improving the pertinence and efficiency of defective product processing, and making the production process of normal batteries smoother. Multiple parallel defective product temporary storage lines 14 can store defective products of different batches or different problems at the same time, and the liquid injection device 4 can be flexibly allocated between the temporary storage lines to realize parallel processing of defective products. This greatly shortens the processing cycle of defective products, allowing the entire assembly line to maintain efficient operation when processing defective products.

[0045] The multiple second rollers 142 and second flexible wheels 143 arranged along the length direction of the temporary storage line can well adapt to defective batteries of different specifications. The second roller 142 supports the bottom of the battery to ensure that the battery is placed stably; the second flexible wheel 143 can be adaptively adjusted according to the shape and size of the battery to limit the position of the battery and assist in the transportation, thereby enhancing the compatibility of the temporary storage line with various types of lithium batteries. The setting of the second flexible wheel 143 avoids damage to the battery caused by rigid contact during the process of limiting the position of the battery and assisting in the transportation. This helps to protect the integrity of defective batteries, provide a better foundation for subsequent rehydration and repair operations, and improve the pass rate of defective products after repair.

[0046] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. An intelligent production line that is flexible and compatible with multiple specifications of lithium battery injection, characterized by: The invention comprises a frame (1), a loading and unloading device (2) arranged on the frame (1) for loading and unloading batteries, a scanning and weighing device (3) for scanning and weighing batteries, a liquid injection device (4) for injecting electrolyte into the battery, a static device (5) for providing a static environment for the battery after being injected by the liquid injection device (4), a liquid replenishing device (6) for replenishing electrolyte for the battery, a glue nailing device (7) for inserting glue nails into the liquid injection port to seal the battery, and a moving device (8) for transferring the battery to various devices; the scanning and weighing device (3) determines whether the electrolyte content of the battery is qualified based on the weight data of the battery, and qualified products are transferred to the liquid injection device (4) via the mobile device (8), and unqualified products are transferred to the liquid replenishing device (6) via the mobile device (8).

2. According to claim 1, a flexible and multi-specification lithium battery injection intelligent production line is characterized by: The loading and unloading device (2) comprises a belt conveyor line rotatably arranged on a frame (1) and a belt driver (22) driving the belt conveyor line. A rotatable first flexible wheel (23) is provided on the belt conveyor line. The number of the first flexible wheels (23) is set to be multiple. The multiple first flexible wheels (23) are arranged along the conveying direction of the belt conveyor line. The first flexible wheels (23) are used to assist in the transportation of batteries of different specifications. A rotatable first roller (24) is also provided on the belt conveyor line to contact with the belt so that the belt is supported when rotating.

3. According to claim 1, a flexible and multi-specification lithium battery injection intelligent production line is characterized by: The liquid injection device (4) comprises a liquid injection frame (41) arranged on a frame (1), the liquid injection frame (41) being provided with a liquid injection mechanism (42), the frame (1) being provided with a liquid injection fixture (43) for storing batteries to be injected with liquid, and a first driving mechanism (44) for driving the liquid injection fixture (43) to reciprocate, the liquid injection mechanism (42) and the liquid injection fixture (43) being used in conjunction with each other, the number of the liquid injection mechanisms (42) and the number of the liquid injection fixtures (43) being both set to be multiple, and the multiple liquid injection mechanisms (42) and the multiple liquid injection fixtures (43) being arranged along the length direction of the liquid injection frame (41); the stationary device ( 5) having a stationary frame (51) and a stationary mechanism arranged on the stationary frame (51); a stationary fixture (52) capable of reciprocating motion and a second driving mechanism (53) for driving the stationary fixture (52) to reciprocate on the frame (1); the stationary fixture (52) being used to store batteries injected by the injection mechanism (42); the stationary mechanism and the stationary fixture (52) being used in conjunction with each other; the number of the stationary mechanisms and the number of the stationary fixtures (52) are both set to be multiple; the multiple stationary mechanisms and the multiple stationary fixtures (52) are arranged along the length direction of the stationary frame (51); the injection frame (41) and the stationary frame (51) are arranged in parallel.

4. According to claim 3, a flexible and multi-specification lithium battery injection intelligent production line is characterized by: The injection mechanism (42) comprises a carrier frame (421) which is reciprocatingly arranged on the injection frame (41); a first driving mechanism (44) drives the carrier frame (421) to reciprocate; a liquid injection cup (422), a liquid injection needle (423) which is reciprocatingly arranged, a first driving component (424) which drives the liquid injection needle (423) to reciprocate, a vacuum pumping component (425) which reciprocates, and a second driving component (426) which drives the vacuum pumping component (425) to reciprocate; and the liquid injection cup (422) is arranged on the carrier frame (421). (422) has a receiving chamber (4221) for receiving electrolyte, an injection input port (4222) for communicating with an injection needle (423), and an injection output port (4223) for communicating with an injection port of a battery, the injection input port (4222) is communicated with the injection output port (4223) via the receiving chamber (4221), the vacuum pipe of the vacuum pumping assembly (425) extends into the receiving chamber (4221), and the injection needle (423) is communicated with the receiving chamber (4221) via the injection input port (4222); The second driving component (426) drives the vacuum pumping component (425) to drive the vacuum pumping tube to move in the accommodating chamber (4221) to control the connection between the vacuum pumping tube and the liquid injection port of the battery. The first driving component (424) drives the liquid injection needle (423) to reciprocate to control the connection between the liquid injection needle (423) and the liquid injection input port (4222) and further control the connection between the liquid injection needle (423) and the liquid injection output port (4223). The reciprocating vacuum pumping component (425) and the reciprocating liquid injection needle (423) are used to vacuum the battery. The liquid is automatically injected after the liquid is injected; a third driving component (427) is arranged on the upper part, the output end of the third driving component (427) is connected to the supporting frame (421), a telescopic spring (428) is sleeved on the liquid injection cup (422), the two ends of the telescopic spring (428) are respectively in contact with the supporting frame (421) and the liquid injection cup (422), and the third driving component (427) drives the supporting frame (421) to compress the telescopic spring (428) to drive the liquid injection output port (4223) of the liquid injection cup (422) to communicate with the liquid injection ports of batteries of different specifications.

5. According to claim 1, the intelligent assembly line for flexible and compatible multi-specification lithium battery injection is characterized in that: The scanning weighing device (3) comprises a first weighing component (31), a second weighing component (32), a third weighing component (33) and a scanning component (34) used in conjunction with the weighing components. The first weighing component (31) is used to weigh the batteries loaded by the loading and unloading device (2), the second weighing component (32) is used to weigh the batteries after being left at rest by the resting device (5), and the third weighing component (33) is used to weigh the batteries after being refilled by the refilling device (6). The weighing components feed back the weighing data of the batteries to the scanning component (34).

6. The intelligent assembly line for flexible and compatible multi-specification lithium battery injection according to claim 5, characterized in that: The weighing assembly comprises a weighing frame (311), a bearing plate (312) arranged on the weighing frame (311), and a first driving cylinder (313) for driving the bearing plate (312) to reciprocate; a weighing device (314) is arranged on the bearing plate (312); a roller conveyor line (315) arranged to rotate; and a driving motor (316) for driving the roller conveyor line (315) to rotate; a pad (317) is arranged on the weighing device (314); and a limiting protrusion (318) for use with the roller conveyor line (315) is arranged on the pad (317); the first driving cylinder (313) drives the bearing plate (312) to drive the weighing device (314) to reciprocate; and the weighing device (314) causes the limiting protrusion (318) to pass through the roller conveyor line (315) via the pad (317). The roller conveyor line (315) is provided with two second driving cylinders (319) in parallel on the bearing plate (312), the two second driving cylinders (319) are located on both sides of the roller conveyor line (315), the driving end of the second driving cylinder (319) is provided with a limiting plate (3111), the limiting plate (3111) is provided with a flexible layer (3112), the two second driving cylinders (319) drive the limiting plate (3111) to drive the flexible layer (3112) to approach each other, so as to limit the position of the batteries on the roller conveyor line (315); a plurality of limiting wheels (3113) are rotatably mounted on the roller conveyor line (315), and the plurality of limiting wheels (3113) are arranged along the conveying direction of the roller conveyor line (315).

7. The intelligent assembly line for flexible and compatible multi-specification lithium battery injection according to claim 1, characterized in that: The moving device (8) comprises a first moving component (81), a second moving component (82) and a third moving component (83) arranged on the frame (1); the first moving component (81) is used to transfer batteries detected by the scanning weighing device (3) to the liquid injection device (4), and to transfer batteries that have been left to rest by the resting device (5) to the loading and unloading device (2); the second moving component (82) is used to transfer defective batteries detected by the scanning weighing device (3) to the liquid replenishing device (6) for liquid replenishment; and the third moving component (83) is used to transfer batteries detected by the scanning weighing device (3) to the liquid replenishing device (6) for liquid replenishment. The battery after being left to stand by the device (2) is transferred to the glue nail device (7); the moving component comprises a first linear motor module (811) arranged on the frame (1), a second linear motor module (812) arranged on the first linear motor module (811) for reciprocating motion, a third linear motor module (813) arranged on the second linear motor module (812) for reciprocating motion, and a clamping jaw assembly (814) arranged on the third linear motor module (813) for reciprocating motion, wherein a flexible block (815) is provided on the clamping jaw of the clamping jaw assembly (814).

8. The intelligent assembly line for flexible and compatible multi-specification lithium battery injection according to claim 1, characterized in that: The frame (1) is provided with a first movable trolley (9) for reciprocating motion, a first driver (11) for driving the first movable trolley (9) for reciprocating motion, a second movable trolley (12) for reciprocating motion, and a second driver (13) for driving the second movable trolley (12) for reciprocating motion, the first driver (11) driving the first movable trolley (9) for transferring batteries that have passed the inspection of the scanning weighing device (3) to the liquid injection device (4), and the second driver (13) driving the second movable trolley (12) for transferring batteries that have been injected by the liquid injection device (4) to the stationary device (5).

9. The intelligent assembly line for flexible and compatible multi-specification lithium battery injection according to claim 1, characterized in that: The glue nail device (7) comprises a glue nail rack (71) arranged on a frame (1), the glue nail rack (71) being provided with a nail magazine assembly (72) that reciprocates, a glue driving assembly (73) for pushing glue nails in the nail magazine assembly (72) to the liquid injection port of the battery, and a glue nail vibrating plate (74) for use in conjunction with the nail magazine assembly (72), the glue nail needle plate arranging the disordered glue nails in an orderly manner and conveying them to the nail magazine assembly (72).

10. The intelligent assembly line for flexible and compatible multi-specification lithium battery injection according to claim 1, characterized in that: The frame (1) is provided with a defective product temporary storage line (14); the moving device (8) moves defective batteries detected as unqualified by the scanning weighing device (3) to the defective product temporary storage line (14); the liquid injection device (4) performs liquid injection operation on the defective batteries in the defective product temporary storage line (14); the number of defective product temporary storage lines (14) is set to be multiple, and the multiple defective product temporary storage lines (14) are arranged in parallel. The defective product temporary storage line (14) has a temporary storage rack (141) arranged on the frame (1), A second roller (142) and a second flexible wheel (143) are rotatably arranged on the temporary storage rack (141); the number of the second rollers (142) and the number of the second flexible wheels (143) are both set to be multiple; the multiple second rollers (142) and the multiple second flexible wheels (143) are arranged along the length direction of the defective temporary storage line (14); the second rollers (142) are used to support the bottom of the defective battery; and the second flexible wheels (143) are used to limit and assist defective batteries of different specifications.

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