Battery cell sensor attaching method

Abstract

The invention discloses a battery cell sensor attaching method which comprises the following steps: S1, oppositely arranging pin ends of two groups of core packages of a battery cell, arranging a cover plate between the two groups of core packages, and conveying the core packages and the cover plate into a rubberizing station; s2, a film sensor is pasted at a preset position of one group of core packages, one end of a pin of the film sensor extends out of the corresponding core package and extends to the cover plate, and then the battery cell is transferred into a wiring station; s3, pulling a pin part of the thin film sensor, inserting the pin part into a cover plate, and welding the pin part and the cover plate; and S4, transferring the battery cells into a packaging station, combining the two groups of core packages together in an overturning manner, and combining and packaging the two groups of core packages with a cover plate. According to the invention, the film sensor can be quickly and accurately adhered to the interior of the battery cell in the existing battery cell processing procedure, so that the energy storage monitoring intelligence and the accident emergency disposal level of the ion battery can be improved by means of an intelligent optical fiber sensing technology.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and in particular to a method for attaching a battery cell sensor. Background Art

[0002] Implanting multi-parameter thin-film sensors in the battery production process is an effective way to solve the problem of high safety and high stability of batteries. Implanting sensing technology at the monomer level can obtain multi-sensing information such as temperature field, strain field, air pressure, gas, etc. inside the monomer throughout its life cycle, which is expected to achieve early warning, early isolation, and early disposal. At the same time, with the help of intelligent fiber optic sensing technology, we can deepen our understanding of the mechanism of battery thermal runaway, monitor the internal and external operating parameters of battery monomers online, and upgrade the traditional energy storage battery management system, which can improve the intelligence level of ion battery energy storage monitoring and improve the emergency disposal level of ion battery energy storage accidents.

[0003] In the prior art battery cell production process, it is necessary to use tape to treat the surface of the hot-pressed battery cell, and the tape is used to fix the battery cell to the battery case or to improve the strength of the battery cell surface or to prevent the battery cell surface from being punctured. In the above process, how to efficiently and quickly stick the thin film sensor to the inside of the battery cell is a problem that technical personnel in this field urgently need to solve. Therefore, a battery cell sensor attachment method is proposed to solve the above problem. Summary of the invention

[0004] The purpose of the present invention is to provide a method for attaching a cell sensor to solve the problem of how to efficiently and quickly attach a thin film sensor to the inside of a cell.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: a method for attaching a battery cell sensor, comprising the following steps:

[0006] S1, arranging the pin ends of two groups of core packages of the battery cell opposite to each other, and arranging the cover plate between the two groups of core packages, and conveying the core packages and the cover plate to a gluing station;

[0007] S2, sticking a thin film sensor to a preset position of one group of core packages, with one end of the pin of the thin film sensor extending out of the corresponding core package and toward the cover plate, and then transferring the battery cell to a wiring station;

[0008] S3, pulling the pin portion of the thin film sensor and inserting it into the cover plate, and welding the pin portion and the cover plate;

[0009] S4, transferring the battery cells to a packaging station, merging the two groups of core packages together by flipping them, and packaging them together with a cover plate.

[0010] Furthermore, the step S2 further includes a calibration step:

[0011] The position information of the core package in the gluing station is obtained, and compared with the preset core package position information, and the position of the core package is adjusted based on the comparison result.

[0012] Furthermore, the step S2 further includes:

[0013] A leveling process, in which the two groups of core packages are pressed and leveled by a leveling mechanism;

[0014] The cleaning process uses a cleaning mechanism to clean the preset position on the flattened core package.

[0015] Furthermore, the leveling process and the cleaning process include the following steps:

[0016] Real-time acquisition of incoming signal from the incoming trigger set in the gluing station;

[0017] When the incoming signal shows that the first group of core packages enters the gluing station, the leveling mechanism level the first group of core packages;

[0018] When the incoming signal shows that the second group of core packages enters the gluing station, the leveling mechanism levels the second group of core packages, and the cleaning mechanism performs a cleaning process on the preset positions on the surfaces of the first group of core packages.

[0019] Furthermore, step S2 includes a sensor roll, wherein the sensor roll includes a release paper layer and a material layer, and the thin film sensor is adhered to the material layer and rolled into the sensor roll;

[0020] When pasting the thin film sensor, the release paper layer and the material layer in the sensor material roll are separated, the thin film sensor adhered to the material layer is exposed and moved closer to the core package, and the thin film sensor is adhered to a preset position on the surface of the core package by a rolling device.

[0021] Furthermore, before the pins and the cover plate are welded in step S3, the following steps are further included:

[0022] Obtaining information about the length of the pin of the thin film sensor extending outward from the core package, and determining whether it meets a predetermined standard;

[0023] If the predetermined standards are met, follow-up work will be carried out;

[0024] If the predetermined standard is not met, the battery cell is transferred to the defective product station.

[0025] Furthermore, the “obtaining information about the length of the pin of the thin film sensor extending outward from the core package” includes:

[0026] Acquire the core package position and the current state of the pin portion of the thin film sensor;

[0027] Extending between the two groups of core packages through a clamping assembly, clamping the pin portion of the thin film sensor and pulling it to a preset angle;

[0028] It is identified that the pins of the thin film sensor extend to a length corresponding to the core package.

[0029] Furthermore, a blowing assembly is provided in the wiring station, and the blowing assembly extends along with the clamping assembly to the bottom of the pin part of the thin film sensor, and adjusts its blowing position according to the current state of the pin part of the thin film sensor. The blowing assembly blows air to make the pin part of the thin film sensor float to a predetermined state to facilitate clamping by the clamping assembly.

[0030] Furthermore, after the core package is received in the defective station, the thin film sensor adhered to the core package is removed by a tearing structure, and the core package is transferred to a gluing station for re-gluing.

[0031] Furthermore, the step S4 includes:

[0032] When the core packages enter the packaging station, two groups of flipping mechanisms provided in the packaging station respectively drive the two groups of core packages to flip upwards with the cover plate as the center until the two groups of core packages are perpendicular to the cover plate;

[0033] Then, the shell is sleeved outside the two groups of core packages from top to bottom and matched with the cover plate, and finally the connection between the cover plate and the shell is welded to complete the packaging.

[0034] The beneficial effects of the present invention are embodied in:

[0035] The present invention can quickly and accurately adhere the thin film sensor to the inside of the battery cell during the existing battery cell processing process, and at the same time accurately connect the pin end of the thin film sensor to the socket on the cover plate, so as to deepen the understanding of the battery thermal runaway mechanism with the help of intelligent optical fiber sensing technology, monitor the internal and external operating parameters of the battery cell online, upgrade the traditional energy storage battery management system, and improve the intelligence of ion battery energy storage monitoring and accident emergency disposal level. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the process of the present invention;

[0037] Figure 2 It is a schematic diagram of the positions of the core package and the cover plate of the present invention;

[0038] Figure 3 It is a schematic diagram of the adhesion position of the thin film sensor of the present invention;

[0039] Figure 4It is a schematic diagram of the positions of the gluing station and the wiring station of the present invention. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-4 The present invention discloses a method for attaching a battery cell sensor, comprising the following steps:

[0042] S1. The pin ends of the two core packages of the battery cell are arranged opposite to each other, and the cover plate is arranged between the two core packages. At the same time, the electrodes of the two core packages are ultrasonically pre-welded, and then the pole pieces and the connecting pieces between the two core packages are superimposed together for ultrasonic final welding, and finally the connecting pieces and the pole pieces are welded to the cover plate, and finally arranged on a conveying unit in the order of core package-cover plate-core package, such as Figure 2 As shown, the core package and the cover plate are then transported to the gluing station by the transport unit;

[0043] S2. Paste the thin film sensor at a preset position of one of the core packages. The preset position is the center of one side of the top of the core package. At the same time, one end of the pin of the thin film sensor extends out of the corresponding core package and extends to the cover plate. Figure 3 As shown, the battery cell is then transferred to the wiring station through the conveying unit;

[0044] S3. In the wiring station, the pin part of the thin film sensor is pulled by the clamping mechanism and inserted into the cover plate, and the pin part and the cover plate are welded;

[0045] S4. Transfer the battery cells to the packaging station, merge the two groups of core packages together by relatively flipping them, and stack them side by side with the pole pieces and the cover plate on the same side. At the same time, the two sides of the connecting piece are bent, and the bent parts are respectively connected to the corresponding pole pieces. Then, through the battery cell positioning mechanism and the shell clamping mechanism, while ensuring the accurate positioning between the battery cell and the shell, the battery cell is inserted into the shell to complete the shell insertion.

[0046] It should also be added that the above step S4 also includes the following steps. When the two groups of core packages are stacked side by side and vertically on the cover plate, the two groups of core packages need to be coated with rubber to further improve the stability of the two groups of core packages, and then Mylar film is coated on the surface to prevent it from loosening and improve its sealing. After the battery cell is put into the shell and the cover plate is welded, the sealing nails are finally welded to complete the battery cell production process.

[0047] Through the above steps, when the present application is in use, the thin film sensor can be quickly and accurately applied to the preset position of the core package, and after the core package is combined into a battery cell and packaged in a shell, the thin film sensor can detect multiple sensor information such as temperature field, strain field, air pressure, gas, etc. inside the battery cell. It should be added that the thin film sensor is a thin film patch with internal integrated optical fiber, wherein the optical fiber sensor is used to realize the detection of internal electrode stress, strain and temperature, and the detection data can truly reflect the electrochemical performance inside the battery, thereby improving the detection accuracy.

[0048] It should be added that step S2 also includes a calibration step:

[0049] S21 obtains the position information of the core package in the gluing station, compares it with the preset core package position information, and adjusts the position of the core package based on the comparison result.

[0050] In order to obtain the position information of the core package mentioned above, a visual sensor and an incoming material sensor can be set in the gluing station. When the core package enters the gluing station, the incoming material sensor sends a signal, and then the visual sensor receives the incoming material signal to obtain the current core package position, and compares the horizontal distance and vertical distance with the preset core package position information. The comparison result is obtained according to the difference between the two, and according to the comparison result, the conveying mechanism is controlled to adjust the core package position until the current core package position coincides with the preset core package position information.

[0051] Meanwhile, in one embodiment, in order to ensure the adhesion effect of the thin film sensor, the surface of the core package needs to be leveled and cleaned, so step S2 also includes:

[0052] S22 is a leveling process, in which two groups of core packages are pressed and leveled by a leveling mechanism.

[0053] S23 cleaning process, cleaning the preset position on the flattened core package by a cleaning mechanism.

[0054] Specifically, the leveling process and the cleaning process include the following steps:

[0055] When the incoming signal shows that the first group of core packages enters the gluing station, the leveling mechanism level the first group of core packages;

[0056] When the incoming signal shows that the second group of core packages enters the gluing station, the leveling mechanism levels the second group of core packages. The leveling process is performed on the two groups of core packages to improve the fit between the two groups of core packages in the subsequent merging process. At the same time, the cleaning mechanism performs a cleaning process on the preset position on the surface of the first group of core packages.

[0057] It should be noted that the leveling mechanism and the cleaning process are arranged parallel to the side of the conveying unit along the conveying direction of the core package from the gluing station to the wiring station. In the process of conveying the core package along the conveying direction, when the incoming signal shows that the first group of core packages enters the gluing station, a pressing leveling mechanism can be used to flip and press the pressing plate on the surface of the core package to level the surface of the core package, or a rolling leveling mechanism can be used to set a pressing roller, which can move to the surface of the core package and perform repeated rolling and leveling.

[0058] Then, when the incoming signal shows that the second group of core packages enters the glue sticking station, the cleaning mechanism performs a cleaning process on the preset area on the surface of the first group of core packages. The cleaning mechanism can adopt a blower cleaning unit to blow air to the preset area to clean up the debris on the surface of the preset area or the positive and negative electrode particle materials adhered to the surface of the core package during the coating process. Alternatively, the cleaning mechanism can also adopt a cleaning unit. The cleaning unit covers the preset area during use and cleans the surface of the preset area with a cleaning brush or a cleaning surface. At the same time, during the cleaning process, the cleaning liquid can be sprayed to further improve the cleaning efficiency.

[0059] In the present application, it should be added that step S2 includes a sensor roll, and the sensor roll includes a release paper layer and a material layer, wherein the sensor roll also includes a material winding section, a release paper layer winding section and a discharge section, the thin film sensor is adhered to the material layer and rolled up in the sensor roll, and the sensor roll is rolled up on the discharge section, the material winding is used to roll up the material layer after the thin film sensor is adhered, and the release paper layer winding section is used to roll up the separated release paper layer.

[0060] When pasting the film sensor, separate the release paper layer from the material layer in the sensor roll, expose the film sensor adhered to the material layer and move it closer to the core package, and adhere the film sensor to a preset position on the surface of the core package through a rolling device.

[0061] It should be noted that various drive units corresponding to the material winding section, the release paper layer winding section and the unwinding section should also be provided to realize the unwinding process of the film sensor. At the same time, the drive unit can also be used to drive the film sensor to be exposed and close to the core package.

[0062] Another embodiment to be explained is that, in step S3, before the pins and the cover plate are welded, a judgment step is further included to analyze whether the adhesion position of the thin film sensor is standard, specifically:

[0063] Obtaining information about the length of the pin of the thin film sensor extending out of the corresponding core package, and determining whether it meets the predetermined standard;

[0064] If the predetermined standards are met, follow-up work will be carried out;

[0065] If the predetermined standards are not met, the battery cells will be transferred to the defective product station.

[0066] In the above, “obtaining information about the length of the pin of the thin film sensor extending out of the corresponding core package” includes:

[0067] The core package position and the current state of the thin film sensor pin part are obtained, and the clamping component is extended between the two groups of core packages to clamp the thin film sensor pin part and pull it to a preset angle to identify the length of the thin film sensor pin extending from the corresponding core package.

[0068] In the above detection steps, it is easy to think that a visual sensor is also provided in the wiring station. The visual sensor is used to identify the position of the thin film sensor and the length information of its pin part after the clamping assembly fixes the pin part of the thin film sensor, so as to determine whether the setting position of the thin film sensor meets the production standards. At the same time, it is determined whether the length of the pin part of the thin film sensor extending to the outside of the core package meets the subsequent wiring requirements.

[0069] With regard to the above-mentioned detection steps, in order to facilitate the clamping assembly in the wiring station to clamp the drooping thin film sensor pin part, a blowing assembly is also provided in the wiring station. The blowing assembly extends to the bottom of the thin film sensor pin part along with the clamping assembly, and adjusts its blowing position according to the current state of the thin film sensor pin part. The blowing assembly blows air to make the thin film sensor pin part float to a predetermined state to facilitate clamping by the clamping assembly.

[0070] It should be added that the predetermined angle at which the blowing component makes the pin part of the thin film sensor float is between plus or minus ten degrees from the horizontal plane. After the pin reaches this angle range, it can be clamped by the clamping component in the subsequent clamping process. For pins in different tilt states, the blowing component uses different methods to blow air on the pin.

[0071] If the pin's tilt angle is between 90-60°, the blowing assembly needs to be moved to the bottom of the pin and close to the battery pack, and the end of the pin close to the battery pack is blown from bottom to top, and then slowly moved to the side away from the battery pack, while slowly lifting upward until the pin is at a predetermined angle;

[0072] When the inclination angle of the pin is between 60-30°, the blowing assembly is transferred to the bottom of the pin and is located in the center of the pin, blowing air to the pin from bottom to top, and then slowly moves to the side away from the battery cell group, while slowly lifting upward until the pin is at a predetermined angle.

[0073] It should be added that, in one embodiment, the blowing component can be disposed inside the clamping component, move synchronously with the clamping component, and blow up the pin portion of the thin film sensor before the clamping component clamps.

[0074] In another embodiment, the blowing assembly can be disposed below the clamping assembly and installed offset from the clamping assembly to blow up the pin portion of the thin film sensor. After the clamping assembly fixes the pin portion of the thin film sensor, the blowing assembly can be retracted to a position where the movement path of the clamping assembly is not affected.

[0075] In another embodiment, after the core package is received in the defective station, the thin film sensor adhered to the core package is removed by the tearing structure, and the core package is transferred to the gluing station for re-gluing.

[0076] Finally, it should be noted that step S4 includes:

[0077] When the core pack enters the packaging station, the two groups of core packs are merged together by relatively flipping, and the two groups of core packs are stacked side by side, and the pole pieces and the cover plate are located on the same side. At the same time, the two sides of the connecting piece are bent, and the bent parts are respectively connected to the corresponding pole pieces. Then, through the battery cell positioning mechanism and the shell clamping mechanism, the battery cell is inserted into the shell while ensuring the accurate positioning between the battery cell and the shell, and the shell is completed;

[0078] Finally, the joints between the cover plate and the shell are welded to complete the assembly. Combining the packaging process is a common technical means in the prior art, so the content of this part is not further expanded and described.

[0079] When the method is used, the thin film sensor can be quickly and accurately adhered to the inside of the battery cell during the existing battery cell processing process, and the pin end of the thin film sensor can be accurately connected to the socket on the cover plate, so as to deepen the understanding of the battery thermal runaway mechanism with the help of intelligent optical fiber sensing technology, monitor the internal and external operating parameters of the battery cell online, upgrade the traditional energy storage battery management system, and improve the intelligence of ion battery energy storage monitoring and accident emergency disposal level.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for attaching a battery cell sensor, characterized in that: The following steps are involved: S1, arranging the pin ends of two groups of core packages of the battery cell opposite to each other, and arranging the cover plate between the two groups of core packages, and conveying the core packages and the cover plate to a gluing station; S2, sticking a thin film sensor to a preset position of one group of core packages, with one end of the pin of the thin film sensor extending out of the corresponding core package and toward the cover plate, and then transferring the battery cell to a wiring station; S3, pulling the pin portion of the thin film sensor and inserting it into the cover plate, and welding the pin portion and the cover plate; S4, transferring the battery cells to a packaging station, merging the two groups of core packages together by flipping them, and packaging them together with a cover plate.

2. The method for attaching a battery cell sensor according to claim 1, characterized in that: The step S2 also includes a calibration step: The position information of the core package in the gluing station is obtained, and compared with the preset core package position information, and the position of the core package is adjusted based on the comparison result.

3. The method for attaching a battery cell sensor according to claim 2, characterized in that: The step S2 further includes: A leveling process, in which the two groups of core packages are pressed and leveled by a leveling mechanism; The cleaning process uses a cleaning mechanism to clean the preset position on the flattened core package.

4. The method for attaching a battery cell sensor according to claim 3, characterized in that: The leveling process and cleaning process include the following steps: Real-time acquisition of incoming signal from the incoming trigger set in the gluing station; When the incoming signal shows that the first group of core packages enters the gluing station, the leveling mechanism level the first group of core packages; When the incoming signal shows that the second group of core packages enters the gluing station, the leveling mechanism levels the second group of core packages, and the cleaning mechanism performs a cleaning process on the preset positions on the surfaces of the first group of core packages.

5. The method for attaching a battery cell sensor according to claim 1, characterized in that: Step S2 includes a sensor roll, wherein the sensor roll includes a release paper layer and a material layer, and the thin film sensor is adhered to the material layer and rolled into the sensor roll; When pasting the thin film sensor, the release paper layer and the material layer in the sensor material roll are separated, the thin film sensor adhered to the material layer is exposed and moved closer to the core package, and the thin film sensor is adhered to a preset position on the surface of the core package by a rolling device.

6. The method for attaching a battery cell sensor according to claim 1, characterized in that: The step S3 also includes, before the pins and the cover plate are welded: Obtaining information about the length of the pin of the thin film sensor extending outward from the core package, and determining whether it meets a predetermined standard; If the predetermined standards are met, follow-up work will be carried out; If the predetermined standard is not met, the battery cell is transferred to the defective product station.

7. The method for attaching a battery cell sensor according to claim 6, characterized in that: The “obtaining the length information of the pin of the thin film sensor extending out from the core package” includes: Acquire the core package position and the current state of the pin portion of the thin film sensor; Extending between the two groups of core packages through a clamping assembly, clamping the pin portion of the thin film sensor and pulling it to a preset angle; It is identified that the pins of the thin film sensor extend to a length corresponding to the core package.

8. The method for attaching a battery cell sensor according to claim 7, characterized in that: A blowing assembly is provided in the wiring station. The blowing assembly extends along with the clamping assembly to below the pin portion of the thin film sensor and adjusts its blowing position according to the current state of the pin portion of the thin film sensor. The blowing assembly blows air to make the pin portion of the thin film sensor float to a predetermined state to facilitate clamping by the clamping assembly.

9. The method for attaching a battery cell sensor according to claim 7, characterized in that: After the core package is received in the defective station, the thin film sensor adhered to the core package is removed by the tearing structure, and the core package is transferred to the gluing station for re-gluing.

10. The method for attaching a battery cell sensor according to claim 1, characterized in that: The step S4 includes: When the core packages enter the packaging station, two groups of flipping mechanisms provided in the packaging station respectively drive the two groups of core packages to flip upwards with the cover plate as the center until the two groups of core packages are perpendicular to the cover plate; Then, the shell is sleeved outside the two groups of core packages from top to bottom and matched with the cover plate, and finally the connection between the cover plate and the shell is welded to complete the packaging.

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