A battery box assembling device for automobile lithium battery processing

Abstract

The present application relates to the technical field of lithium battery, specifically to a battery box assembling equipment for automobile lithium battery processing, which comprises a rack and two conveyors, and a pressure bearing frame is arranged below the gap between the two conveyors; two first attaching assemblies are further arranged on the rack, and two second attaching assemblies are further arranged on the two sides of the pressure bearing frame; the relative rotation of the conveyors and the descending process of the battery box are closely matched, so that the film can be quickly and accurately wrapped in U shape on the side wall of the battery box, the attaching time is reduced, and the attaching efficiency is improved. The first attaching assembly and the second attaching assembly respectively attach the bottom and the side wall of the battery box, and the second attaching assembly works alternately, avoiding mutual interference, so that the attaching process is more smooth and efficient. This step-by-step attaching and alternating operation mode greatly shortens the overall attaching time and improves the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, specifically to a battery box assembly equipment for automotive lithium battery processing. Background Technology

[0002] As a core energy storage component in the new energy field, the processing precision and packaging quality of lithium batteries directly affect their safety and lifespan. In the lithium battery production process, the coating process is one of the key steps in battery box assembly. By applying insulating films, fire-retardant films, and other materials to the outer wall of the battery box, the battery's waterproof, dustproof performance, and structural stability can be effectively improved. However, existing lithium battery processing systems and coating tooling generally suffer from incomplete coating, specifically only able to partially coat the side walls of the battery box, failing to achieve full encapsulation including the bottom, resulting in insufficient protective performance of the battery box.

[0003] For example, Chinese Patent Publication No. CN112103564B discloses a lithium battery processing system, including a support mechanism, an encapsulation mechanism, a transmission mechanism, a power mechanism, a clamping mechanism, a battery box, a pressing mechanism, and a battery cover mechanism. The encapsulation mechanism is connected to the middle of the support mechanism, the transmission mechanism is connected to the encapsulation mechanism, the power mechanism is connected to the upper part of the support mechanism, the clamping mechanism is connected to the power mechanism, the battery box is located in the middle of the support mechanism, the pressing mechanism is connected to the power mechanism, and the battery cover mechanism is detachably connected to the bottom of the pressing mechanism. This patented lithium battery processing system only involves electrode post installation and material filling processes, without integrating encapsulation functionality, and lacks a design for applying material to the bottom of the battery box. Sidewall application must be completed through subsequent independent processes, and bottom protection is completely absent, making it difficult to meet the sealing requirements for a fully enclosed battery box.

[0004] Another Chinese patent authorization announcement number CN209658323U discloses a novel universal tooling for encapsulating square lithium batteries, including: a chassis and an unwinding shaft on the rotating mounting chassis for unwinding the tape roll. A first guide platform and a second guide platform are fixedly mounted on the chassis and on one side of the unwinding shaft. The first guide platform is located on the side of the second guide platform closer to the unwinding shaft, and a gap is reserved between the first and second guide platforms to form a passageway. Multiple pressure rollers are arranged at intervals along the depth direction on the sidewalls of the passageway. Each pressure roller is parallel to the unwinding shaft, and the spacing between the pressure rollers on both sides of the passageway decreases from the top to the bottom. Although this patent proposes an encapsulation tooling, it only achieves partial encapsulation of the battery box side by applying the adhesive to the sidewalls using pressure rollers. It lacks an effective attachment mechanism for the film extension at the bottom edge of the battery box, resulting in an exposed area at the junction of the bottom and sidewalls, which is prone to short circuit risks due to liquid seepage or mechanical impact. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a battery box assembly device for automotive lithium battery processing. This invention utilizes the close coordination between the relative rotation of the conveyor belt and the descent of the battery box to enable the film to be quickly and accurately wrapped in a U-shape around the sidewall of the battery box, reducing application time and improving application efficiency. The first and second application components respectively apply the film to the bottom and sidewalls of the battery box, and the second application component works alternately to avoid mutual interference, making the application process smoother and more efficient. This step-by-step application and alternating operation method significantly shortens the overall application time and improves production efficiency.

[0006] To address the problems of existing technologies, this invention provides a frame and two conveyor belts spaced apart on the frame, with a gap between the two conveyor belts allowing a battery box to pass through. A film covers the two conveyor belts, and the width of the film is greater than the width of the battery box, forming an extension beyond both sides of the battery box. A pressure frame for supporting the battery box is provided below the gap, and the pressure frame can slide along the height direction of the frame. Two first attachment components are also provided on the frame, which can slide relative to each other in a horizontal direction. The two first attachment components are used to contact the extension of the film at the bottom of the battery box and drive the extension towards the battery box to achieve adhesion. Second attachment components are provided on both sides of the pressure frame. The two second attachment components can slide relative to each other, and the sliding direction is perpendicular to the sliding direction of the first attachment components. The two second attachment components are used to contact the extension of the film on the side wall of the battery box and drive the extension towards the battery box to achieve adhesion.

[0007] Preferably, the bottom of the frame is provided with a base, and both first attachment components include a movable seat. A first pressure roller is provided at one end of the movable seat near the center of the base. The movable seat can slide along the width direction of the base, and the movable seat is elastically connected to the edge of the base. A gap matching the battery box is left between the movable seats of the two first attachment components.

[0008] Preferably, both second attachment components include a connecting seat that can slide along the length of the base, the connecting seat is provided with two second pressure rollers that extend in the vertical direction, the two second pressure rollers are spaced apart by a distance that matches the battery box, and the base is provided with a first linear driver for driving the connecting seat.

[0009] Preferably, each of the two conveyor belts is provided with a positioning frame at one end close to the other, and the positioning frame is provided with a plurality of first guide rollers arranged along the height direction of the frame.

[0010] Preferably, two second guide rollers are provided between the two positioning frames. The second guide rollers are telescopic, and their two ends are respectively sleeved on the first guide rollers on the two positioning frames. A spacing matching the battery box is left between the two second guide rollers.

[0011] Preferably, each of the two conveyor belts is provided with a rotatable mounting bracket at one end close to the other, and a third pressure roller is provided at the end of the mounting bracket away from the conveyor belt. Tension springs are provided between the two ends of the third pressure roller and the conveyor belt. The third pressure roller is located in the gap between the two conveyor belts before the battery box is attached.

[0012] Preferably, the conveyor belt is provided with multiple through holes arranged in a rectangular row, and the conveyor belt is provided with a negative pressure chamber for adsorbing and positioning the membrane.

[0013] Preferably, the conveyor belt is also equipped with a sensor that can detect the movement position of the membrane.

[0014] Preferably, two guide rods are provided below the pressure frame, the two guide rods pass through the base and slide with it, and each guide rod is provided with an elastic element.

[0015] Preferably, a second linear actuator capable of driving the pressure frame to move is also provided below the base, and the pressure frame is provided with a clamping component driven by electromagnetic force.

[0016] The advantages of this invention compared to the prior art are:

[0017] 1. This invention utilizes the close coordination between the relative rotation of the conveyor belt and the descent of the battery box to enable the film to be quickly and accurately wrapped in a U-shape around the side wall of the battery box, reducing application time and improving application efficiency. The first and second application components apply the film to the bottom and side wall of the battery box respectively, with the second application component working alternately to avoid mutual interference, making the application process smoother and more efficient. This step-by-step application and alternating operation method significantly shortens the overall application time and improves production efficiency. The entire application process is highly automated, reducing manual operation and lowering the labor intensity of operators. Simultaneously, automated operation reduces application quality problems caused by human factors, improving product yield and reducing production costs.

[0018] 2. This invention utilizes a positioning frame and multiple first guide rollers to form a dynamic limiting channel for the descent of the battery box. The first guide rollers not only guide the film's transport but also physically limit the battery box, forcing it to descend vertically from the center of the film, thus laying a precise positioning foundation for subsequent U-shaped wrapping and film application processes. The second guide rollers can adjust their spacing by sliding on the first guide rollers, ensuring contact with the sidewalls of battery boxes of different sizes. The two first guide rollers and two second guide rollers form a four-sided encircling limiting mechanism, forcing the geometric center of the battery box to coincide with the center of the film. This improves the smoothness of the battery box's descent and the film application effect.

[0019] 3. The present invention, through the setting of the mounting frame and the third pressure roller, enables the third pressure roller to drive the film to adhere to the side wall of the battery box during the descent of the battery box. The third pressure roller rolls along the surface of the battery box, pressing the film evenly onto the side wall, while offsetting the local stress caused by the fluctuation of the conveyor belt speed or the tilt of the battery box, ensuring that the film is tightly adhered to the side wall of the battery box without any air bubbles. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a battery box assembly equipment for automotive lithium battery processing.

[0021] Figure 2 This is a front view of a battery box assembly equipment used in the processing of automotive lithium batteries.

[0022] Figure 3 This is a three-dimensional structural diagram of the battery box application process in a battery box assembly equipment for automotive lithium battery processing.

[0023] Figure 4 This is a front view of the battery box application process in a battery box assembly equipment for automotive lithium battery processing.

[0024] Figure 5 This is a three-dimensional structural diagram of a base, a first attachment component, and a second attachment component in a battery box assembly equipment for automotive lithium battery processing.

[0025] Figure 6 This is a three-dimensional structural diagram of a base and a first attachment component in a battery box assembly equipment for automotive lithium battery processing.

[0026] Figure 7 This is a three-dimensional structural diagram of the membrane extension at the bottom of the battery box in a battery box assembly equipment for automotive lithium battery processing, when it is folded upwards.

[0027] Figure 8 This is a three-dimensional structural diagram of the membrane extension on the side wall of a battery box in a battery box assembly equipment for automotive lithium battery processing, when it folds towards the center.

[0028] Figure 9 This is a three-dimensional structural diagram of a conveyor belt and positioning clamp in a battery box assembly equipment for automotive lithium battery processing.

[0029] Figure 10 yes Figure 9 Enlarged view of point A in the middle.

[0030] The numbers on the map are:

[0031] 1. Frame; 11. Base; 12. Pressure support frame; 121. Clamping assembly; 122. Second linear actuator; 13. Guide rod; 131. Elastic element; 14. First attachment assembly; 141. Moving seat; 142. First pressure roller; 15. Second attachment assembly; 151. Connecting seat; 152. Second pressure roller; 153. First linear actuator; 2. Conveyor belt; 21. Positioning frame; 211. First guide roller; 212. Second guide roller; 22. Mounting frame; 221. Third pressure roller; 222. Tension spring; 23. Through hole; 231. Negative pressure chamber; 24. Sensor; 3. Battery box; 31. Membrane. Detailed Implementation

[0032] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1 to 4 , Figure 7 and Figure 8 As shown: A battery box assembly equipment for automotive lithium battery processing includes a frame 1 and two conveyor belts 2 spaced apart on the frame 1, with a gap between the two conveyor belts 2 allowing a battery box 3 to pass through; a membrane 31 covers the two conveyor belts 2, and the width of the membrane 31 is greater than the width of the battery box 3, forming an extension beyond both sides of the battery box 3; a pressure frame 12 for supporting the battery box 3 is provided below the gap, and the pressure frame 12 can slide along the height direction of the frame 1; two other support frames are also provided on the frame 1 that can slide relative to each other along the horizontal direction. The first attachment components 14 slide towards each other. The two first attachment components 14 are used to contact the extension of the film 31 at the bottom of the battery box 3 and drive the extension to bend towards the battery box 3 to achieve the attachment. The two sides of the pressure frame 12 are provided with second attachment components 15. The two second attachment components 15 can slide relative to each other, and the sliding direction is perpendicular to the sliding direction of the first attachment components 14. The two second attachment components 15 are used to contact the extension of the film 31 on the side wall of the battery box 3 and drive the extension to bend towards the battery box 3 to achieve the attachment.

[0034] A film 31 feeding device is installed beside the conveyor belt 2. The feeding device can place the film 31 one by one onto the conveyor belt 2. After the film 31 is placed on the conveyor belt 2, one side of the conveyor belt 2 starts, which moves the film 31 smoothly towards the other side of the conveyor belt 2. During this process, the film 31 will continuously adjust its position until its center position is aligned with the center line of the gap between the two conveyor belts 2.

[0035] It should be noted that the length of the film 31 is calculated to match the battery box 3, while the width of the film 31 is greater than that of the battery box 3, thus forming extensions on both sides of the battery box 3 to prepare for subsequent application.

[0036] At this time, the pressure frame 12 is located below the gap of the conveyor belts 2 and is in a standby state. The operator smoothly places the battery box 3 onto the pressure frame 12 from above the gap, and the bottom of the battery box 3 will contact the center of the membrane 31. Then, by applying pressure to the battery box 3 or by moving the pressure frame 12 downward, the battery box 3 slides along the height direction of the frame 1. Since the bottom of the battery box 3 is in close contact with the center of the membrane 31, and the gap between the two conveyor belts 2 provides a smooth downward channel for the battery box 3, the two conveyor belts 2 begin to rotate relative to each other as the battery box 3 descends. This relative rotation allows the membrane 31 to move synchronously towards the gap as the battery box 3 descends, thereby matching the descent process of the battery box 3, so that the membrane 31 wraps around the side wall of the battery box 3 in a U-shape, completing the initial application work.

[0037] As the pressure-bearing frame 12 continues to move downwards along the height direction of the frame 1, the two first attachment components 14 on the frame 1 begin to move relative to each other. These two first attachment components 14 will contact the extension of the membrane 31 at the bottom of the battery box 3. Under the synergistic action of the pressure-bearing frame 12 and the two first attachment components 14, the portion of the extension of the membrane 31 located at the bottom of the battery box 3 will fold upwards and adhere tightly to the outer wall of the battery box 3, thus improving the adhesion effect of the membrane 31.

[0038] After the bottom of the extension of the membrane 31 is applied, the pressure frame 12 moves upward, making the height of the battery box 3 higher than the first attachment component 14 to avoid interference in subsequent operations. At this time, the second attachment components 15 located on both sides of the pressure frame 12 begin to move relative to each other in the horizontal direction. These two second attachment components 15 will contact the portions of the extension of the membrane 31 located on the two side walls of the battery box 3, allowing the extension of the membrane 31 to fold towards the battery box 3. To avoid mutual interference caused by the simultaneous movement of the two second attachment components 15, the two second attachment components 15 will work alternately. With the continuous movement of the second attachment components 15, the membrane 31 will be tightly attached to the outer wall of the battery box 3, ultimately achieving the effect that the entire part except the top surface of the battery box 3 is wrapped by the membrane 31.

[0039] After the membrane 31 is applied, the operator removes the lithium battery with the membrane 31 applied. Then, the pressure frame 12 returns to its initial position, and the equipment enters the next assembly process of the battery box 3. This cycle is repeated to efficiently complete the assembly of the battery box 3.

[0040] The relative rotation of the conveyor belt 2, in close coordination with the descent of the battery box 3, allows the film 31 to be quickly and accurately wrapped in a U-shape around the side wall of the battery box 3, reducing application time and improving application efficiency. The first application component 14 and the second application component 15 apply the film to the bottom and side wall of the battery box 3 respectively, with the second application component 15 working alternately to avoid mutual interference, making the application process smoother and more efficient. This step-by-step application and alternating operation method significantly shortens the overall application time and improves production efficiency.

[0041] The entire application process is highly automated, reducing manual operations and the workload of operators. At the same time, automation also reduces application quality issues caused by human error, improving product yield and lowering production costs.

[0042] like Figures 1 to 8 As shown: A base 11 is provided at the bottom of the frame 1. Both first attachment components 14 include a movable seat 141. A first pressure roller 142 is provided at one end of the movable seat 141 near the center of the base 11. The movable seat 141 can slide along the width direction of the base 11, and the movable seat 141 is elastically connected to the edge of the base 11. A gap matching the battery box 3 is left between the movable seats 141 of the two first attachment components 14.

[0043] During equipment operation, the movable seats 141 of the two first attachment components 14 are in a movable state based on their elastic connection with the base 11. Furthermore, a pre-set spacing between the two movable seats 141 matches the spacing of the battery box 3. When the battery box 3, supported by the pressure frame 12, descends along the height direction of the frame 1 to the bottom of the frame 1, the lower edge of the battery box 3 contacts the first pressure rollers 142 on the two movable seats 141. At this time, the pressure generated by the continuous descent of the battery box 3 pushes the two movable seats 141 to overcome the resistance of the elastic connection and move in opposite directions along the width direction of the base 11.

[0044] By reserving a spacing between the movable seats 141 to match the battery box 3, the device can easily adapt to battery boxes 3 of different sizes. As long as the size of the battery box 3 is within a certain range, the film 31 can be applied by the elastic movement of the movable seats 141. This improves the versatility and applicability of the device and reduces the cost for enterprises to frequently change equipment due to the production of battery boxes 3 of different sizes.

[0045] Meanwhile, the elastic connection ensures that the first pressure roller 142 is in close contact with the battery box 3, achieving precise film 31 application and guaranteeing the stability of the application quality. As the moving seat 141 moves, it evenly squeezes and applies the film 31. This dynamic application method allows the film 31 to better conform to the shape of the battery box 3, effectively avoiding problems such as air bubbles and wrinkles between the film 31 and the battery box 3, improving the flatness and firmness of the film 31 application, thereby enhancing the protective performance and appearance quality of the battery box 3.

[0046] The elastic connection between the movable seat 141 and the base 11 serves as a buffer and shock absorber. At the moment the battery box 3 descends and contacts the first pressure roller 142, the elastic connection absorbs and disperses the impact force, reducing the vibration and wear on the equipment, lowering the probability of equipment failure, improving the stability and reliability of the equipment, and extending the service life of the equipment.

[0047] like Figures 1 to 8 As shown: Both second attachment components 15 include a connecting seat 151 that can slide along the length direction of the base 11. The connecting seat 151 is provided with two second pressure rollers 152 that extend in the vertical direction. There is a gap between the two second pressure rollers 152 that matches the battery box 3. The base 11 is provided with a first linear driver 153 for driving the connecting seat 151.

[0048] After the battery box 3 completes the application of the bottom film 31 under the action of the pressure frame 12, the pressure frame 12 will be raised to a position higher than the first attachment component 14, and the second attachment component 15 will begin to work. The first linear actuator 153 on the base 11 will start to output driving force. The first linear actuator 153 is preferably a cylinder or an electric actuator, and the driving force acts on the connecting seat 151, driving the connecting seat 151 to slide along the length direction of the base 11.

[0049] Because the connecting seat 151 is provided with two second pressure rollers 152 extending vertically, and the two second pressure rollers 152 are spaced apart to match the battery box 3, during the sliding of the connecting seat 151, the two second pressure rollers 152 will approach the battery box 3 from both sides. When the second pressure rollers 152 contact the extension of the membrane 31 on the side wall of the battery box 3, as the connecting seat 151 continues to slide, the second pressure rollers 152 will apply pressure to the extension of the membrane 31 and cause the extension of the membrane 31 to fold towards the center of the battery box 3.

[0050] It should be noted that both second pressure rollers 152 are made of elastic material to ensure that the film 31 can be accurately attached to the side wall of the battery box 3.

[0051] To avoid mutual interference caused by the simultaneous movement of the two second attachment components 15, the first linear actuators 153 of the two second attachment components 15 control the connectors 151 to slide alternately. That is, the connector 151 of one second attachment component 15 slides to complete the attachment of one side of the film 31 extension, and then the connector 151 of the other second attachment component 15 slides to complete the attachment of the other side of the film 31 extension, ultimately achieving a tight attachment between the extension of the film 31 on the side wall of the battery box 3 and the outer wall of the battery box 3, so that the entire part except the top surface of the battery box 3 is covered by the film 31. After the attachment is completed, the first linear actuators 153 drive the connectors 151 to reset, waiting for the next working command.

[0052] like Figures 1 to 4 and Figure 9 As shown: Positioning frames 21 are provided at the ends of the two conveyor belts 2 that are close to each other, and multiple first guide rollers 211 are arranged on the positioning frames 21 along the height direction of the frame 1.

[0053] The positioning frame 21 and multiple first guide rollers 211 form a dynamic limiting channel for the descent of the battery box 3. When the battery box 3 begins to descend from above the gap, the two side walls of the battery box 3 will first contact the first guide rollers 211 on the positioning frame 21. Since the first guide rollers 211 can rotate freely around their own axis, and the multiple first guide rollers 211 are arranged vertically along the height direction (consistent with the descent direction of the battery box 3), the lateral spacing of the first guide rollers 211 is pre-adjusted according to the width of the battery box 3, forming a constraint on both sides of the battery box 3, forcing the battery box 3 to descend vertically along the central axis of the gap of the conveyor belt 2, avoiding lateral deviation caused by manual placement deviation or equipment vibration, and ensuring that the bottom of the battery box 3 is accurately aligned with the center position of the membrane 31; as the battery box 3 descends, the first guide rollers 211 continuously adhere to the side walls of the battery box 3 through rolling contact, counteracting the tilting torque during the descent process, keeping the battery box 3 in a vertical posture, ensuring that the central area of ​​the membrane 31 is evenly stressed, and avoiding localized pulling or wrinkling of the membrane 31 due to the tilt of the battery box 3. Through the above mechanism, the first guide roller 211 not only realizes the conveying and guiding of the film 31, but also forces the battery box 3 to descend vertically from the center of the film 31 by physically limiting it, thus laying a precise positioning foundation for the subsequent U-shaped wrapping and attaching process of the film 31.

[0054] The guide roller surface can be covered with flexible materials, such as silicone or polyurethane, which reduces hard friction on the surface of the battery box 3 through elastic contact while limiting the position. This is especially suitable for lithium battery shells with fragile surface coatings, avoiding scratches or indentations caused by traditional rigid limiting devices. Rolling friction replaces sliding friction, reducing the resistance of the battery box 3 during descent. Combined with the uniform support of the pressure frame 12, this further improves the stability of the battery box 3 during descent.

[0055] like Figures 1 to 4 and Figure 9 As shown: Two second guide rollers 212 are arranged between the two positioning frames 21. The second guide rollers 212 are telescopic structures. The two ends of the second guide rollers 212 are respectively sleeved on the first guide rollers 211 on the two positioning frames 21. A gap matching the battery box 3 is left between the two second guide rollers 212.

[0056] The second guide roller 212 adopts a telescopic structure. Both ends of the second guide roller 212 are respectively sleeved on the first guide rollers 211 of the two positioning frames 21, and the initial distance between the two second guide rollers 212 matches that of the battery box 3. The distance between the second guide rollers 212 can be adjusted by sliding them on the first guide rollers 211, ensuring contact with the side walls of battery boxes 3 of different specifications. The two first guide rollers 211 and the two second guide rollers 212 can form a four-sided encircling limit, forcing the geometric center of the battery box 3 to coincide with the center of the membrane 31.

[0057] As the battery box 3 descends from above the membrane 31, its sidewalls come into contact with the surface of the second guide roller 212. Since the second guide roller 212 can rotate around its own axis, it converts sliding friction into rolling friction, eliminating descent resistance and ensuring that the battery box 3 falls smoothly in the vertical direction, avoiding localized stretching of the membrane 31 due to jamming.

[0058] like Figures 1 to 4 , Figure 9 and Figure 10 As shown: Each of the two conveyor belts 2 is provided with a rotatable mounting bracket 22 at one end close to each other. A third pressure roller 221 is provided at the end of the mounting bracket 22 away from the conveyor belt 2. Tension springs 222 are provided between the two ends of the third pressure roller 221 and the conveyor belt 2. The third pressure roller 221 is located in the gap between the two conveyor belts 2 before the battery box 3 is attached.

[0059] After the conveyor belt 2 is started, the membrane 31 moves from one side of the conveyor belt 2 to the other side. The mounting brackets 22 at one end of the two conveyor belts 2 remain horizontal under the tension of the tension spring 222, so that the third pressure roller 221 is located in the center of the gap between the conveyor belts 2, forming the initial support structure for the membrane 31. This prevents the membrane 31 from becoming loose or wrinkled in the center due to hanging and sagging, and ensures that the center of the membrane 31 is aligned with the center line of the gap between the two conveyor belts 2.

[0060] When the battery box 3 is placed in the center of the membrane 31 from above the gap, its bottom first contacts the membrane 31, and then pushes the third pressure roller 221 to swing to both sides. Since the mounting bracket 22 is connected to the conveyor belt 2 by a rotating joint (such as a pin), and the tension spring 222 provides the restoring tension, when the third pressure roller 221 is subjected to the lateral force of the battery box 3, it will drive the mounting bracket 22 to rotate around its connection point with the conveyor belt 2. At the same time, it will synchronously drive the membrane 31 to adhere to the side wall of the battery box 3, forming an initial U-shaped wrapping of the membrane 31 around the battery box 3. At this time, the tension spring 222 is stretched and stores elastic potential energy.

[0061] As the battery box 3 descends with the pressure frame 12, the relative rotation of the conveyor belt 2 drives the membrane 31 to move into the gap. The third pressure roller 221 is always in close contact with the side wall of the battery box 3 under tension through the tension spring 222. The third pressure roller 221 rolls along the surface of the battery box 3, pressing the membrane 31 evenly against the side wall, while offsetting the local stress caused by the speed fluctuation of the conveyor belt 2 or the tilt of the battery box 3, ensuring that the membrane 31 is tightly attached to the side wall of the battery box 3 without any air bubbles.

[0062] After the battery box 3 is applied and lifted, the tension spring 222 releases its potential energy, causing the mounting frame 22 to reset, and the third pressure roller 221 returns to the center of the gap, providing support and positioning for the delivery of the next film 31.

[0063] like Figures 1 to 4 , Figure 9 and Figure 10 As shown: The conveyor belt 2 is provided with multiple through holes 23 arranged in a rectangular row, and the conveyor belt 2 is provided with a negative pressure cavity 231 for adsorbing and positioning the membrane 31.

[0064] The negative pressure chamber 231 is connected to an external vacuum pump via a pipe. When the membrane 31 is placed on the conveyor belt 2, the vacuum pump is activated to ensure the membrane 31 remains stable when in contact with the battery box 3. This creates a stable negative pressure within the negative pressure chamber 231. The negative pressure chamber 231 generates an adsorption force through the through holes 23, tightly adhering the membrane 31 to the surface of the conveyor belt 2. The rectangularly arranged through holes 23 ensure that the adsorption force is evenly applied to the membrane 31, preventing wrinkles or displacement caused by uneven local force. After the membrane 31 moves to the target position with the conveyor belt 2, the adsorption force can be adjusted according to the requirements of the application process. For example, strong adsorption can be maintained to fix the membrane 31 during the conveying stage, while the adsorption can be weakened or turned off during the application stage. This allows the membrane 31 to flexibly fold and wrap with the battery box 3 as it descends and the pressure rollers move, forming a tight fit with the outer wall of the battery box 3.

[0065] like Figure 9 As shown: The conveyor belt 2 is also equipped with a sensor 24 that can detect the movement position of the membrane 31.

[0066] Sensors 24, installed on conveyor belt 2, can monitor the movement of membrane 31 in real time. Sensors 24 are mounted on both sides of conveyor belt 2 or at key locations along the movement path of membrane 31, continuously emitting detection signals. As membrane 31 moves with conveyor belt 2, sensors 24 detect changes in signal obstruction or reflection, acquiring real-time position information of the membrane 31's edge or positioning marks. Sensors 24 transmit the collected position signals to the backend control system. If a positional shift of membrane 31 is detected, the control system immediately generates a deviation signal, driving conveyor belt 2 to adjust its speed or direction. This ensures that membrane 31 corrects its positional deviation in real time during movement, guaranteeing that the center of membrane 31 is always aligned with the centerline of the gap in conveyor belt 2, providing a precise positioning reference for the subsequent pressing and application of battery box 3.

[0067] The automatic positioning function of sensor 24 eliminates the need for operators to master complex membrane 31 alignment techniques; they only need to perform basic operations such as feeding the membrane 31 sheets to start the equipment. This solves the pain point of traditional equipment relying on skilled workers, making it particularly suitable for the rapid deployment and expansion needs of large-scale automated production lines.

[0068] like Figures 1 to 6 As shown: Two guide rods 13 are provided below the pressure frame 12. The two guide rods 13 pass through the base 11 and slide with it. Each of the two guide rods 13 is provided with an elastic element 131.

[0069] Two guide rods 13, located below the pressure-bearing frame 12, penetrate vertically through the base 11 and slide in engagement with the base 11, forming a rigid guiding constraint on the pressure-bearing frame 12 to ensure its linear movement along the height direction of the frame 1. The elastic element 131 absorbs the impact energy when the battery box 3 is pressed down, preventing local stress concentration caused by rigid contact between the membrane 31 and the bottom edge of the battery box 3.

[0070] like Figures 1 to 6 As shown: A second linear actuator 122 capable of driving the pressure frame 12 to move is also provided below the base 11, and a clamping assembly 121 driven by electromagnetic force is provided on the pressure frame 12.

[0071] After the battery box 3 is placed on the pressure frame 12, the electromagnetic drive clamping assembly 121 is activated. The clamping assembly 121 preferably consists of two relatively movable jaws. Electromagnetic force drives the adaptive clamping of the battery box 3. The two jaws are in an open state under the action of an electromagnetic drive mechanism, such as an electromagnetic linear motor or electromagnetic chuck, and the initial distance between the two jaws is greater than the width of the battery box 3. When the battery box 3 is placed on the surface of the pressure frame 12, the jaws can move to clamp the battery box 3. The clamping force can be adjusted by the current to accommodate battery boxes 3 of different sizes, pulling the battery box 3 downwards.

[0072] The pressure frame 12 can be driven to descend by the second linear actuator 122, which is preferably a cylinder or an electric actuator. The second linear actuator 122 can realize the lifting and lowering of the pressure frame 12, ensuring the subsequent operation of the second attachment component 15 and the reset of the pressure frame 12.

[0073] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A battery box assembly equipment for automotive lithium battery processing, comprising a frame and two conveyor belts spaced apart on the frame, characterized in that, There is a gap between the two conveyor belts that allows the battery box to pass through; The membrane covers two conveyor belts, and the width of the membrane is greater than the width of the battery box, forming an extension that extends beyond the sides of the battery box. Below the gap is a support frame for supporting the battery box, which can slide along the height of the frame; The frame is also equipped with two first attachment components that can slide relative to each other in the horizontal direction. The two first attachment components are used to contact the extension of the film at the bottom of the battery box and drive the extension to bend into the battery box to achieve attachment. The pressure frame is provided with a second attachment component on both sides. The two second attachment components can slide relative to each other, and the sliding direction is perpendicular to the sliding direction of the first attachment component. The two second attachment components are used to contact the extension of the film on the side wall of the battery box and drive the extension to bend towards the battery box to achieve the attachment. The bottom of the frame is provided with a base, and both first attachment components include a movable seat. A first pressure roller is provided at one end of the movable seat near the center of the base. The movable seat can slide along the width direction of the base, and the movable seat is elastically connected to the edge of the base. A gap matching the battery box is left between the movable seats of the two first attachment components. Both second attachment components include a connector that can slide along the length of the base, and the connector is provided with two second pressure rollers that extend in the vertical direction. A gap matching the battery box is left between the two second pressure rollers, and the base is provided with a first linear driver for driving the connector. Each of the two conveyor belts is equipped with a positioning frame at one end close to the other, and the positioning frame is equipped with multiple first guide rollers arranged along the height direction of the frame. Two second guide rollers are provided between the two positioning frames. The second guide rollers are telescopic structures. The two ends of the second guide rollers are respectively sleeved on the first guide rollers on the two positioning frames. A gap is left between the two second guide rollers to match the battery box. Two conveyor belts are each equipped with a rotatable mounting bracket at one end close to the other. A third pressure roller is mounted on the end of the mounting bracket furthest from the conveyor belt. Tension springs are installed between the two ends of the third pressure roller and the conveyor belt. The third pressure roller is located in the gap between the two conveyor belts before the battery box is attached.

2. The battery box assembly equipment for automotive lithium battery processing according to claim 1, characterized in that, The conveyor belt has multiple through holes arranged in a rectangular row, and a negative pressure chamber for adsorbing and positioning the membrane.

3. The battery box assembly equipment for automotive lithium battery processing according to claim 2, characterized in that, The conveyor belt is also equipped with sensors that can detect the movement of the membrane.

4. The battery box assembly equipment for automotive lithium battery processing according to claim 1, characterized in that, Two guide rods are installed below the pressure frame. The two guide rods pass through the base and slide with it. Both guide rods are equipped with elastic elements.

5. The battery box assembly equipment for automotive lithium battery processing according to claim 4, characterized in that, A second linear actuator is also provided below the base to drive the pressure frame to move, and the pressure frame is provided with a clamping assembly driven by electromagnetic force.

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