A short circuit detection device for winding machine battery cells
By designing a short-circuit detection device for battery cells in a winding machine, timely identification and rejection of short-circuited cells were achieved, solving the problems of safety accidents and low efficiency caused by short-circuited cells in lithium battery production, and improving production safety and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 江苏远航锦锂新能源科技有限公司
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-26
AI Technical Summary
During the lithium battery production process, short circuits may occur in the wound cells. Short-circuited cells that are not identified in time will enter the hot pressing process, leading to safety accidents and reduced production efficiency.
Design a short-circuit detection device for battery cells in a winding machine, including a detection mechanism, a transverse mechanism, and a limit sensor. The device performs short-circuit detection on the battery cells using a detection probe group and processes the detection results.
Effectively identify and eliminate short-circuited battery cells, avoid safety accidents during hot pressing, improve production efficiency, reduce production costs, and ensure product quality.
Smart Images
Figure CN224287107U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery cell testing technology, and in particular to a short-circuit detection device for battery cells in a winding machine. Background Technology
[0002] In the lithium battery manufacturing process, the winding machine, as a key piece of equipment, plays a crucial role in precisely winding the positive electrode sheet, negative electrode sheet, and separator according to a specific sequence and process requirements to form the battery cell. After winding, the battery cell proceeds to the subsequent hot-pressing process. The hot-pressing process not only ensures a tight fit between the internal components of the cell, reducing its thickness and increasing energy density, but also effectively improves the cell's interface performance, enhancing its consistency and stability, playing a vital role in the final battery performance. Therefore, ensuring the quality of the battery cells entering the hot-pressing process is an important prerequisite for guaranteeing the quality and efficiency of lithium battery production.
[0003] In actual production, there may be a certain number of short-circuited cells in the wound cells. If the short-circuited cells are not identified in time and effectively, they will directly enter the hot pressing process. During the hot pressing process, the short-circuited parts may experience more serious short circuits due to the effects of high temperature and high pressure, and may even cause safety accidents. At the same time, these short-circuited cells will occupy the processing time of the hot pressing equipment, reduce production efficiency, and increase production costs, so there is room for improvement. Utility Model Content
[0004] To address the issue of short-circuited battery cells occupying processing time, this application provides a short-circuit detection device for battery cells in a winding machine.
[0005] The short-circuit detection device for winding machine battery cells provided in this application adopts the following technical solution:
[0006] A short-circuit detection device for battery cells in a winding machine includes a detection mechanism arranged on one side of the cold pressing plate of the winding machine. The detection mechanism includes a support frame, a transverse transfer plate, a lifting drive cylinder, a detection plate body, and a detection probe assembly. The support frame is arranged on one side of the cold pressing plate, the transverse transfer plate is arranged on the support frame, the lifting drive cylinder is vertically connected to the transverse transfer plate, and the piston end of the lifting drive cylinder is connected to the detection plate body. The detection probe assembly includes a positive electrode detection probe and a negative electrode detection probe, which are distributed on the end face of the detection plate body. The support frame is provided with a transverse transfer mechanism for driving the transverse transfer plate.
[0007] Since a certain number of short-circuited cells may exist in the wound cells, if these short-circuited cells are not identified in a timely and effective manner, they will directly enter the hot pressing process. During the hot pressing process, the short-circuited parts may experience more serious short circuits due to the effects of high temperature and high pressure, which may even lead to safety accidents. At the same time, these short-circuited cells will occupy the processing time of the hot pressing equipment, reduce production efficiency, and increase production costs. By adopting the above technical solution, including a detection mechanism, the detection mechanism includes a support frame, a transverse carrier plate, a lifting drive cylinder, a detection plate body, and a detection probe group. The support frame is also equipped with a transverse mechanism.
[0008] After the winding machine completes the cold pressing process of the battery cell, the lateral movement mechanism is immediately activated. According to a preset program, the lateral movement mechanism drives the lateral movement carrier plate to move horizontally along the support frame, moving the entire detection mechanism (including the lifting drive cylinder, the detection plate body, and the detection probe assembly) to the designated position. This ensures the detection probe assembly is directly facing the positive and negative electrode areas of the cold-pressed battery cell. Once the lateral movement is complete, the lifting drive cylinder begins operation, its piston slowly extending downwards, pushing the detection plate body and the detection probe assembly downwards together. The positive and negative detection probes gradually approach the positive and negative electrodes of the battery cell until they make good contact. The detection circuit immediately conducts, initiating short-circuit testing of the battery cell. The device measures parameters such as resistance and voltage between the positive and negative terminals of the battery cell and compares them with a preset qualified threshold range. (If the measured value is within the qualified range, the battery cell is determined to be qualified; if the measured value exceeds the qualified range (e.g., the resistance value is too low, which may indicate a short circuit), the battery cell is determined to be short-circuited.) Regardless of the test result, the testing device needs to be reset. (The winding machine's control system processes the battery cell accordingly based on the test result. For qualified batteries, they continue to enter the subsequent hot pressing process. For short-circuited batteries, the control system will issue an alarm signal to prompt the operator to remove the short-circuited battery cell to prevent it from entering the hot pressing process.)
[0009] By incorporating detection and transverse mechanisms, short-circuited cells are effectively identified and removed before hot pressing, preventing safety accidents caused by short circuits during hot pressing. This also prevents short-circuited cells from occupying the hot pressing equipment time, significantly improving production efficiency, reducing production costs, and effectively ensuring production safety and product quality.
[0010] Optionally, the traversing mechanism includes a guide rail base, a traversing lead screw, a traversing slider, and a traversing drive motor. The guide rail base is arranged on a support frame, the traversing lead screw is rotatably connected inside the guide rail base, the output end of the traversing drive motor is connected to the end of the traversing lead screw, the traversing slider is slidably connected inside the guide rail base, the traversing slider is threadedly connected to the traversing lead screw, and the traversing carrier plate is connected to the traversing slider.
[0011] By adopting the above technical solution, the transverse movement mechanism includes a guide rail base, a transverse lead screw, a transverse slider, and a transverse drive motor. Through the setting of the transverse movement mechanism, the detection mechanism on the transverse carrier plate can be accurately moved to the designated position, ensuring that the short circuit detection work can be carried out smoothly and accurately, and effectively guaranteeing the reliability of the detection results.
[0012] Optionally, the guide rail base is provided with a lateral limiting accessory for limiting the position of the transverse carrier plate. The lateral limiting accessory includes a trigger baffle and two limiting sensors. The two limiting sensors are respectively arranged at both ends of the guide rail base in the length direction. The trigger baffle is connected to the surface of the transverse slider and cooperates with the two limiting sensors.
[0013] By adopting the above technical solution, the lateral limiting accessory is installed on the guide rail base. The lateral limiting accessory includes a trigger baffle and two limit sensors. As the lateral slider moves continuously, the trigger baffle connected to its surface also moves along with it. When the lateral slider moves to one end of the guide rail base along its length, the trigger baffle gradually approaches and eventually enters the sensing range of the limit sensor at that end, triggering its internal photoelectric or electromagnetic induction mechanism. The limit sensor immediately generates an electrical signal, which is quickly transmitted to the control system of the device. The system immediately identifies that the lateral slider has moved to the preset limit position. After receiving the stop command, the lateral drive motor immediately stops running, and the lateral lead screw also stops rotating, thereby stopping the lateral slider and accurately stopping at the limit position at that end. By setting the lateral limiting accessory, the device damage or detection position deviation caused by excessive movement of the lateral slider is effectively avoided, significantly improving the stability, accuracy, and safety of the device operation, and providing reliable position assurance for cell short circuit detection.
[0014] Optionally, each of the aforementioned limit sensors is provided with a fixed limit block, which is connected to the guide rail base.
[0015] By adopting the above technical solution, the limit sensor is installed on the guide rail base by a fixed limit block. The fixed limit block enhances the structural stability of the limit sensor on the guide rail base, effectively prevents it from shifting due to equipment vibration or external interference, ensures the accuracy of the limit detection function, and facilitates the installation, debugging and maintenance of the limit sensor, thus improving the maintainability of the equipment.
[0016] Optionally, the support frame is provided with a cable track for protecting the cable, one end of the cable track is connected to the support frame, and the other end of the cable track is connected to the transverse carrier plate.
[0017] By adopting the above technical solution, the cable track is installed on the support frame. The cable track effectively solves the problems of cable messiness and wear that may occur during the movement of the transverse carrier plate. The cable track can flexibly extend, retract and bend with the movement of the transverse carrier plate, always keeping the cable inside, avoiding damage such as collision and scratch due to exposure, and extending the service life of the cable.
[0018] Optionally, the transverse carrier plate is provided with a guide slide rail, which is arranged along the height direction of the support frame, and the detection plate body is provided with a guide slider for cooperating with the guide slide rail.
[0019] By adopting the above technical solution, the guide rail is installed on the transverse carrier plate, and the main body of the detection plate slides on the guide rail via the guide slider. The setting of the guide rail and the guide slider improves the stability and accuracy of the lifting and moving of the main body of the detection plate. The cooperation between the guide rail and the guide slider provides a reliable guiding effect for the main body of the detection plate, effectively avoiding problems such as shaking and deviation during the lifting and lowering process, ensuring that the detection probe group can accurately contact the positive and negative electrodes of the battery cell, thereby ensuring the accuracy of the short circuit detection results.
[0020] Optionally, the detection plate body is provided with an anti-collision buffer head to prevent damage to the detection probe group, and the anti-collision buffer head is arranged in the same direction as the detection probe group.
[0021] By adopting the above technical solution, the anti-collision buffer head is installed on one side of the detection probe group. The anti-collision buffer head provides reliable safety protection for the detection probe group. The anti-collision buffer head can preferentially withstand the impact force, effectively buffer and absorb the collision energy, and prevent the detection probe group from being directly impacted and causing damage such as bending or breakage, thus extending the service life of the detection probe group.
[0022] Optionally, the detection board body is provided with a detection display screen for displaying detection data in real time.
[0023] By adopting the above technical solution, the detection display screen is installed on the main body of the detection board. The display screen enables the visualization of detection data, improves the convenience and intuitiveness of the detection process, and allows for quick understanding of the short-circuit detection results of the battery cells, timely judgment of whether the battery cells are qualified, thereby significantly shortening the detection response time and improving production efficiency.
[0024] In summary, this application includes at least one of the following beneficial technical effects:
[0025] 1. Through the setting of detection mechanism and transverse movement mechanism, it is effectively ensured that short-circuited cells are effectively identified and rejected before hot pressing, avoiding safety accidents caused by short circuits during hot pressing. At the same time, it prevents short-circuited cells from occupying the hot pressing equipment time, which greatly improves production efficiency, reduces production costs, and effectively ensures production safety and product quality.
[0026] 2. By setting up the lateral limit accessory, the equipment damage or detection position deviation caused by excessive movement of the lateral slider is effectively avoided, which significantly improves the stability, accuracy and safety of the device operation and provides reliable position guarantee for cell short circuit detection;
[0027] 3. The anti-collision buffer head provides reliable safety protection for the detection probe group. The anti-collision buffer head can withstand the impact force first, effectively buffer and absorb the collision energy, and prevent the detection probe group from being directly impacted and causing damage such as bending or breakage, thus extending the service life of the detection probe group. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the structure of a short-circuit detection device for a winding machine cell according to an embodiment of this application.
[0029] Figure 2 This is a partial cross-sectional view used to illustrate the lateral movement mechanism in the embodiments of this application.
[0030] Figure 3 This is a side view of a short-circuit detection device for a winding machine cell according to an embodiment of this application.
[0031] Explanation of reference numerals in the attached drawings: 1. Detection mechanism; 11. Support frame; 12. Transverse carrier plate; 13. Lifting drive cylinder; 14. Detection plate body; 15. Detection probe group; 2. Transverse mechanism; 21. Guide rail base; 22. Transverse lead screw; 23. Transverse slider; 24. Transverse drive motor; 3. Lateral limit accessory; 31. Trigger baffle; 32. Limit sensor; 4. Fixed limit block; 5. Cable track; 6. Guide rail; 7. Guide slider; 8. Anti-collision buffer head; 9. Detection display screen. Detailed Implementation
[0032] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.
[0033] This application discloses a short-circuit detection device for battery cells in a winding machine. (Refer to...) Figure 1 The short circuit detection device for the battery cell of the winding machine includes a detection mechanism 1. In this embodiment, the detection mechanism 1 is installed on one side of the cold pressing plate of the winding machine, located before the hot pressing process of the winding machine. The winding machine and the cold pressing plate are both existing technologies. The detection mechanism 1 is used to perform short circuit detection on the battery cell after cold pressing.
[0034] Reference Figure 1 The testing mechanism 1 includes a support frame 11, a transverse transfer plate 12, a lifting drive cylinder 13, a testing plate body 14, and a testing probe group 15. The support frame 11 is installed on one side of the cold pressing plate, and the transverse transfer plate 12 is arranged on the support frame 11. At the same time, a transverse transfer mechanism 2 is provided between the support frame 11 and the transverse transfer plate 12. The transverse transfer mechanism 2 is used to drive the transverse transfer plate 12 to move laterally.
[0035] Reference Figure 1 and Figure 2 The transverse mechanism 2 includes a guide rail base 21, a transverse lead screw 22, a transverse slider 23, and a transverse drive motor 24. The guide rail base 21 is fixedly connected to the top of the support frame 11. The guide rail base 21 has a hollow structure inside. The transverse lead screw 22 is rotatably connected inside the guide rail base 21 and is arranged along the length of the guide rail base 21. Meanwhile, the transverse drive motor 24 is installed outside the guide rail base 21. The output end of the transverse drive motor 24 passes through the guide rail base 21 and is connected to the end of the transverse lead screw 22. In this embodiment, the transverse drive motor 24 can achieve forward and reverse rotation.
[0036] Reference Figure 1 and Figure 2 The transverse lead screw 22 passes through the transverse slider 23 and is threadedly connected to the transverse slider 23. The transverse slider 23 is slidably connected in the guide rail base 21. Both ends of the transverse slider 23 extend out of the guide rail base 21 and are fixedly connected to the transverse carrier plate 12. In this embodiment, the upper and lower surfaces of the guide rail base 21 are provided with slots for the transverse slider 23 to extend out. The slots are opened along the length direction of the transverse lead screw 22.
[0037] Reference Figure 1 and Figure 3 A lateral limiting accessory 3 is installed on the guide rail base 21. The lateral limiting accessory 3 includes a trigger baffle 31 and two limit sensors 32. The two limit sensors 32 are respectively arranged at both ends of the guide rail base 21 along its length. In this embodiment, the limit sensors 32 can be photoelectric or electromagnetic induction mechanisms. Each limit sensor 32 is equipped with a fixed limit block 4. The fixed limit block 4 is installed on the guide rail base 21 and fixed with bolts. The fixed limit block 4 enhances the structural stability of the limit sensor 32 on the guide rail base 21, effectively preventing it from displacing due to equipment operation vibration or external interference, ensuring the accuracy of the limit detection function, and also facilitating the installation, debugging and maintenance of the limit sensor 32, thus improving the maintainability of the equipment.
[0038] Reference Figure 1 and Figure 3The trigger baffle 31 is connected to the upper surface of the horizontal slider 23 and cooperates with the two limit sensors 32. When the horizontal slider 23 moves to one end of the guide rail base 21 along its length, the trigger baffle 31 gradually approaches and eventually enters the sensing range of the limit sensor 32 at that end, triggering its internal photoelectric or electromagnetic induction mechanism. The limit sensor 32 immediately generates an electrical signal, which is quickly transmitted to the control system of the device, immediately identifying that the horizontal slider 23 has moved to the preset limit position. This effectively avoids equipment damage or detection position deviation caused by excessive movement of the horizontal slider 23, significantly improving the stability, accuracy and safety of the device operation, and providing reliable position guarantee for cell short circuit detection.
[0039] Reference Figure 1 The support frame 11 is equipped with a cable track 5 on its top. In this embodiment, the support frame 11 can be equipped with a track plate for placing the cable track 5. One end of the cable track 5 is fixedly connected to the track plate of the support frame 11, and the other end of the cable track 5 is fixedly connected to the transverse transfer plate 12. This effectively solves the problems of mess and wear that may occur when the cable moves on the transverse transfer plate 12. The cable track 5 can flexibly extend, retract and bend with the movement of the transverse transfer plate 12, always keeping the cable inside, avoiding damage such as collision and scratch caused by the cable being exposed to the outside, and extending the service life of the cable.
[0040] Reference Figure 1 The detection plate body 14 is arranged on the outside of the transverse transfer plate 12. The lifting drive cylinder 13 is vertically installed on the transverse transfer plate 12 and is arranged in the height direction of the support frame 11. The piston end of the lifting drive cylinder 13 is connected to the detection plate body 14. In this embodiment, a guide slide rail 6 is installed and fixed on the transverse transfer plate 12. The guide slide rail 6 is arranged in the same direction as the lifting drive cylinder 13. A guide slider 7 is installed on the detection plate body 14 and is slidably connected to the guide slide rail 6. There are multiple sets of guide slide rails 6 and guide sliders 7. This improves the stability and accuracy of the lifting and moving of the detection plate body 14. The cooperation of the guide slide rail 6 and the guide slider 7 provides a reliable guiding effect for the detection plate body 14, effectively avoiding problems such as shaking and deviation during the lifting and moving process. This ensures that the detection probe group 15 can accurately contact the positive and negative electrodes of the battery cell, thereby ensuring the accuracy of the short circuit detection results.
[0041] Reference Figure 1 The detection probe group 15 includes a positive detection probe and a negative detection probe, which are distributed on the end face of the detection board body 14. In this embodiment, the positive detection probe and the negative detection probe correspond to the positive and negative poles of the battery cell, respectively, and the positions of the positive detection probe and the negative detection probe are adjustable.
[0042] Reference Figure 1The detection board body 14 is equipped with a detection display screen 9. The detection display screen 9 and the detection probe group 15 can be electrically connected. The detection display screen 9 realizes the visualization of detection data, improves the convenience and intuitiveness of the detection process, can quickly grasp the short circuit detection results of the battery cell, and promptly judge whether the battery cell is qualified, thereby greatly shortening the detection response time and improving production efficiency.
[0043] Reference Figure 1 The detection plate body 14 is equipped with an anti-collision buffer head 8, which is arranged in the same direction as the detection probe group 15. The extension length of the anti-collision buffer head 8 can be adjusted according to the actual situation. It provides reliable safety protection for the detection probe group 15. The anti-collision buffer head 8 can withstand the impact force first, effectively buffer and absorb the collision energy, and prevent the detection probe group 15 from being directly impacted and causing bending, breakage and other damage, thus extending the service life of the detection probe group 15.
[0044] The implementation principle of the short-circuit detection device for battery cells in this application embodiment is as follows: After the winding machine completes the cold pressing process of the battery cell, the transverse movement mechanism 2 is immediately started. According to the preset program, the transverse movement mechanism 2 drives the transverse movement carrier plate 12 to move horizontally along the support frame 11, driving the entire detection mechanism 1 (including the lifting drive cylinder 13, the detection plate body 14, and the detection probe group 15) to move to the designated position, so that the detection probe group 15 is facing the positive and negative electrode areas of the cold-pressed battery cell. After the transverse movement is in place, the lifting drive cylinder 13 starts to work, and its piston end slowly extends downward, pushing the detection plate body 14 to move the detection probe group 15 downward together. The positive electrode detection probe and the negative electrode detection probe gradually approach the positive and negative electrodes of the battery cell until they make good contact with the positive and negative electrodes of the battery cell, and the detection is successful. The testing circuit immediately conducts and begins short-circuit detection of the battery cell. The detection device measures parameters such as the resistance and voltage between the positive and negative terminals of the battery cell and compares them with a preset qualified threshold range. (If the measured value is within the qualified range, the battery cell is determined to be qualified; if the measured value exceeds the qualified range (e.g., the resistance value is too low, which may indicate a short circuit), the battery cell is determined to be short-circuited.) Regardless of the detection result, the detection device needs to be reset. (The winding machine's control system processes the battery cell accordingly based on the detection result. For qualified battery cells, they continue to the subsequent hot pressing process. For short-circuited battery cells, the control system will issue an alarm signal, prompting the operator to remove the short-circuited battery cell to prevent it from entering the hot pressing process.)
[0045] By using the detection mechanism 1 and the transverse movement mechanism 2, short-circuited cells are effectively identified and removed before hot pressing, thus preventing safety accidents caused by short circuits during hot pressing. At the same time, it prevents short-circuited cells from occupying the hot pressing equipment time, which greatly improves production efficiency, reduces production costs, and effectively ensures production safety and product quality.
[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A short-circuit detection device for a winding machine battery cell, comprising a detection mechanism arranged on one side of the cold pressing plate of the winding machine, characterized in that: The detection mechanism includes a support frame, a transverse transfer plate, a lifting drive cylinder, a detection plate body, and a detection probe assembly. The support frame is arranged on one side of the cold-pressed plate, the transverse transfer plate is arranged on the support frame, the lifting drive cylinder is vertically connected to the transverse transfer plate, and the piston end of the lifting drive cylinder is connected to the detection plate body. The detection probe assembly includes a positive detection probe and a negative detection probe, which are distributed on the end face of the detection plate body. The support frame is provided with a transverse transfer mechanism for driving the transverse transfer plate.
2. The short-circuit detection device for a winding machine battery cell according to claim 1, characterized in that: The traversing mechanism includes a guide rail base, a traversing lead screw, a traversing slider, and a traversing drive motor. The guide rail base is arranged on a support frame. The traversing lead screw is rotatably connected inside the guide rail base. The output end of the traversing drive motor is connected to the end of the traversing lead screw. The traversing slider is slidably connected inside the guide rail base. The traversing slider is threadedly connected to the traversing lead screw, and the traversing carrier plate is connected to the traversing slider.
3. The short-circuit detection device for a winding machine battery cell according to claim 2, characterized in that: The guide rail base is provided with a lateral limiting accessory for limiting the position of the transverse carrier plate. The lateral limiting accessory includes a trigger baffle and two limiting sensors. The two limiting sensors are respectively arranged at both ends of the guide rail base in the length direction. The trigger baffle is connected to the surface of the transverse slider and cooperates with the two limiting sensors.
4. The short-circuit detection device for a winding machine battery cell according to claim 3, characterized in that: Each of the aforementioned limit sensors is provided with a fixed limit block, which is connected to the guide rail base.
5. A short-circuit detection device for a winding machine battery cell according to claim 1, characterized in that: The support frame is equipped with a cable track for protecting the cable. One end of the cable track is connected to the support frame, and the other end of the cable track is connected to the transverse carrier plate.
6. The short-circuit detection device for a winding machine battery cell according to claim 1, characterized in that: The transverse carrier plate is provided with a guide slide rail, which is arranged along the height direction of the support frame. The detection plate body is provided with a guide slider for cooperating with the guide slide rail.
7. A short-circuit detection device for a winding machine battery cell according to claim 1, characterized in that: The detection plate body is provided with an anti-collision buffer head to prevent damage to the detection probe group, and the anti-collision buffer head is arranged in the same direction as the detection probe group.
8. A short-circuit detection device for a winding machine battery cell according to claim 1, characterized in that: The detection board body is equipped with a detection display screen for real-time display of detection data.