Battery cell pressure load simulation detection device

Abstract

The utility model discloses a cell pressure load simulation detection device, including with the same profile of the profiled part of cell, be provided with pressure sensor on the profiled part, pressure sensor is located the position of cell pressure load, the side of profiled part is provided with a plurality of magnet, a plurality of magnet is about the symmetry line of magnet side face symmetry distribution, and the magnetic pole of two magnets symmetrical to each other faces the opposite of side face out. The utility model discloses the utility model is through setting pressure sensor on the profiled part surface, makes it accurate simulation real cell in the production process received the pressure such as clamping, pushing, and the profiled part side is set to the magnet of symmetry distribution, makes a plurality of profiled parts when approaching can automatically adsorb, fast alignment and firm connection.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to a device for simulating and testing the compressive load on battery cells. Background Technology

[0002] During battery production, battery cells undergo various clamping and pushing operations with grippers and fixtures as they move along the production line, subjecting them to pressure loads. However, most battery manufacturers currently lack effective and reasonable testing devices on their production lines, leading to frequent instances of unreasonable pressure applied to the cells by grippers and fixtures. Excessive pressure can directly damage the cells, affecting their performance and lifespan; while insufficient pressure may cause cells to fall during production, damaging them and disrupting production schedules.

[0003] To address this, some existing technologies employ pressure sensors placed at the pressure load locations on simulated profiles with the same size and outline as the battery cell. Then, grippers and fixtures used during production are applied to these simulated profiles in the same way as they would to a real battery cell, thereby detecting the actual pressure exerted on the cell. However, such simulated profiles can only simulate the pressure experienced by a single battery cell during operation. Some production processes require the simultaneous clamping or other operations on two or more cells. Furthermore, the size and weight of battery cells are frequently adjusted according to market demands. For example, some cells may be several times larger than before, or cells of the same size may use different internal materials, resulting in variations in weight. This necessitates the use of simulated profiles in various specifications, which not only increases costs but also hinders standardized material management and usage. Utility Model Content

[0004] To solve at least one of the above-mentioned technical problems, this utility model provides a battery cell pressure load simulation detection device. The contouring parts have a magnetic attraction structure, which can temporarily connect multiple contouring parts together as needed, thereby facilitating the simulation detection of the pressure on the battery cell under different operating conditions.

[0005] The technical solution adopted in this utility model is to design a battery cell pressure load simulation detection device, including a contoured part with the same outer contour as the battery cell. A pressure sensor is provided on the contoured part and the pressure sensor is located at the position of the battery cell under pressure load. Several magnets are provided on the side of the contoured part. The several magnets are symmetrically distributed about the symmetry line of the side where the magnets are located. The magnetic poles of two symmetrical magnets facing outwards are opposite.

[0006] In some embodiments, the pressure sensor is a thin-film pressure sensor, and the conformal component is provided with a signal acquisition module and a wireless signal transmission module connected to the pressure sensor.

[0007] In some embodiments, the thin-film pressure sensor is covered on both opposite sides of the contoured part.

[0008] In some embodiments, the end face of the magnet is flush with the side face on which it is located.

[0009] In some embodiments, the contouring element is a rectangular block with at least two opposite sides having several magnets.

[0010] In some embodiments, the magnets on opposite sides are front-to-back and the magnetic poles on the outer sides of opposite sides face opposite directions.

[0011] In some embodiments, the magnet is a cylindrical magnet with a through hole in the middle, the magnet is located in a screw hole, and a screw passes through the through hole and connects to the screw hole.

[0012] In some embodiments, the conforming member has a storage cavity, and a counterweight is placed inside the storage cavity.

[0013] In some embodiments, the plurality of the storage cavities are symmetrically located on two sides of the contoured member.

[0014] In some embodiments, the contoured part is provided with a slot, the slot is provided with an insert block, and the storage cavity is disposed on the insert block.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention utilizes pressure sensors on the surface of contoured parts to accurately simulate the clamping and pushing pressures experienced by real battery cells during production. Pairs of symmetrically distributed magnets are located on the sides of the contoured parts, allowing multiple parts to automatically attract, quickly align, and securely connect when brought close together. This magnetic structure allows for free combination of multiple contoured parts without additional connectors, flexibly simulating single or multiple battery cell pressure conditions according to testing requirements. Through these features, the testing device achieves simplified structure, convenient assembly, and high fidelity in pressure simulation, improving the accuracy of production line pressure control, preventing battery cell damage caused by over- or under-voltage, and significantly enhancing the quality and reliability of battery cell production. Attached Figure Description

[0017] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings. To illustrate the details and facilitate understanding of its principles, the drawings are not necessarily to scale, and similar reference numerals may describe similar components in different views. The accompanying drawings generally illustrate the embodiments discussed herein by way of example and not limitation. Wherein:

[0018] Figure 1 This is a front view schematic diagram of the detection device.

[0019] Figure 2 This is a three-dimensional schematic diagram of the detection device.

[0020] Figure 3 This is a schematic diagram of two contoured parts adsorbed together.

[0021] Figure 4 yes Figure 3 Enlarged diagram of point A in the middle.

[0022] Figure 5 This is a three-dimensional schematic diagram of the detection device from another angle.

[0023] Figure 6 This is a schematic diagram showing the three contoured parts after they have been glued together.

[0024] Figure 7 This is a cross-sectional schematic diagram of the detection device.

[0025] In the diagram, 1. First magnet; 2. Second magnet; 3. Third magnet; 4. Fourth magnet; 5. Fifth magnet; 6. Contouring part; 7. Thin-film pressure sensor; 8. Signal acquisition module; 9. Wireless signal transmission module; 10. Power supply module; 11. Screw; 12. Insert block; 13. Compartment; 14. Configuration block; 15. Iron block; 16. Pull button. Detailed Implementation

[0026] The following are specific embodiments of this utility model, and the technical solution of this utility model will be further described with reference to the accompanying drawings. However, this utility model is not limited to these embodiments, and the following embodiments do not limit the utility model involved in the claims. In addition, all combinations of features described in the embodiments are not necessarily necessary for the solution of the utility model.

[0027] The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0028] Example

[0029] like Figure 1 , 2 As shown in Figures 3 and 4, the battery cell pressure load simulation detection device includes a contoured part 6 with the same outer contour as the battery cell, preferably made of aluminum alloy. A pressure sensor is provided on the contoured part 6, and the pressure sensor is located at the position where the battery cell is subjected to pressure load. Several magnets are provided on the side of the contoured part 6. The several magnets are symmetrically distributed about the symmetry line of the side where the magnets are located. The magnetic poles of two magnets that are symmetrical about the symmetry line have opposite magnetic poles facing outwards from the side.

[0030] The profile part 6 is machined according to the actual shape of the battery cell, ensuring that its dimensions, stress location, and pressure direction are consistent with the actual battery cell. Pressure sensors are pre-installed on the surface of the profile part 6, positioned at locations where the battery cell will experience pressure loads during clamping, pushing, or positioning on the production line. When clamps, fixtures, or other production equipment apply pressure to the profile part 6, the pressure sensors can instantly collect the force data at that location, accurately reflecting the magnitude of the pressure the battery cell will bear during the corresponding process.

[0031] To enable the contouring component 6 to be flexibly combined according to different working conditions, multiple magnets are arranged on the side of the contouring component 6. The magnets are symmetrically distributed around the center of the side, and the outward magnetic poles of the two magnets arranged in pairs are opposite. With this structure, when two adjacent contouring components 6 are close together, their magnets are attracted to each other, allowing multiple contouring components 6 to be quickly connected into one unit without additional fastening components, thereby simulating the scenario in the production line where dual or multiple battery cells are clamped, pushed, or positioned simultaneously.

[0032] When the 6-piece profiling assembly is assembled, and the gripper or fixture applies pressure to the assembly, each pressure sensor can independently collect the force at its corresponding position, which can reflect the pressure on a single cell as well as the force when multiple cells are operated simultaneously.

[0033] The temporary assembly method achieved through a magnetic attraction structure simulates the stress conditions when different numbers of battery cells are operated simultaneously, avoiding the need to manufacture multiple simulation structures. This significantly reduces the debugging costs of production equipment and improves the standardization of materials. The magnetic connection method can maintain a stable assembly state under pressure and can be easily disassembled after testing, improving the efficiency of the testing device.

[0034] In this embodiment, four magnets are arranged on the side of the contouring component 6. For ease of explanation, the four magnets are named First Magnet 1, Second Magnet 2, Third Magnet 3, and Fourth Magnet 4. First Magnet 1 and Second Magnet 2 are symmetrical about the central axis of symmetry of the side, and Third Magnet 3 and Fourth Magnet 4 are also symmetrical about the central axis of symmetry of the side. The N pole of First Magnet 1 faces outward, and the S pole of Second Magnet 2 faces outward; the N pole of Third Magnet 3 faces outward, and the S pole of Fourth Magnet 4 faces outward. This allows the sides of the two contouring components 6 to be brought together by the magnetic force of the magnets, simulating the state when two battery cells are operated simultaneously.

[0035] Furthermore, such as Figure 5 As shown, the pressure sensor is a thin-film pressure sensor 7. In order to convert the pressure signal and send it to an external terminal (such as an industrial control host computer), the contoured part 6 is equipped with a signal acquisition module 8 and a wireless signal transmission module 9 connected to the pressure sensor.

[0036] The pressure sensor employs a thin-film pressure sensor 7, which is thin and highly flexible, allowing it to be closely fitted to the pressure-bearing position of the profiled part 6 without affecting the external dimensions of the profiled part 6 or its consistency with the actual battery cell. When subjected to external pressure, the resistance or capacitance of the thin-film pressure sensor 7 changes, and the signal acquisition module 8 reads this change in real time and converts it into a processable pressure signal. The acquired pressure data is transmitted to an external receiving terminal via the built-in wireless signal transmission module 9, achieving real-time, contactless data output. This structure eliminates the need for wired connections, does not affect the assembly method of the profiled part 6 or the normal operation of the production line equipment, and improves the convenience of testing; at the same time, the high sensitivity of the thin-film sensor can more accurately reflect the pressure state, making pressure measurement more accurate and reliable.

[0037] Of course, the corresponding contouring component 6 is also provided with a power supply module 10 for supplying power to the pressure sensor, the signal acquisition module 8 and the signal wireless transmission module 9.

[0038] The signal acquisition module 8 typically includes an analog-to-digital converter, a filtering circuit, an amplification circuit, and a microprocessor unit. The analog signal output by the pressure sensor is first filtered and amplified, then converted into a digital signal by the analog-to-digital converter. The microprocessor then processes, calibrates, and packages the data to form a stable data output format.

[0039] To avoid wiring affecting production line operations and improve inspection convenience, a wireless signal transmission module 9 is further incorporated within the contoured part 6. This module can utilize Bluetooth, Wi-Fi, ZigBee, or other low-power wireless communication chips, with the microprocessor transmitting the collected pressure data to an external receiving terminal (such as a host computer, tablet computer, or inspection display device). The wireless transmission module supports real-time data transmission and can be configured with data caching and retransmission mechanisms to ensure stable transmission of pressure data even under complex operating conditions.

[0040] With the above structure, the pressure sensor can collect pressure information in real time, the signal acquisition module 8 can achieve accurate measurement and processing, and the wireless transmission module can ensure stable data output. This makes the entire detection system have the advantages of high precision, fast response and flexible layout, which is easy for those skilled in the art to understand and implement.

[0041] The pressure sensor, signal acquisition module 8, and wireless signal transmission module 9 used in this embodiment are all well-known and mature technologies in the field, and their composition and operation have been widely used in existing technologies. For example, the structure of the thin-film pressure sensor 7 and its principle of pressure detection through resistance / capacitance changes are commonly used in the field; the amplification circuit, filtering circuit, analog-to-digital conversion unit, and microprocessor data processing flow included in the signal acquisition module 8 are also conventional technical means; the communication methods such as Bluetooth, Wi-Fi, and ZigBee used by the wireless transmission module are also mature technology products. In the field of industrial automation, the thin-film pressure sensor 7 has been widely used in robotic grippers and logistics sorting equipment, achieving real-time pressure monitoring by attaching it to the clamping surface to avoid overpressure damage to precision workpieces; in consumer electronics products, the thin-film pressure sensor 7 is often used in electronic scales and smart wearable devices to detect changes in pressure or weight, and its signal acquisition and processing methods are the same as in this embodiment. Furthermore, the signal acquisition module 8 and the wireless transmission module, as mature electronic units, are also widely used in smart home devices, mobile portable detection devices, and other scenarios. For example, smart pressure pads and wireless force sensing modules all adopt a combination structure of microprocessor + analog-to-digital conversion + wireless communication (such as Bluetooth or Wi-Fi) to realize the acquisition and remote transmission of pressure data. Therefore, the electronic modules used in this embodiment are all well-known applications of the prior art, and their combination can be directly implemented by those skilled in the art. Therefore, the specific circuit structure and software implementation will not be described here. This utility model does not make any new limitations on the internal circuit structure or working mechanism of the above-mentioned electronic modules. The specification only describes their combination method and application in the contouring component 6. Those skilled in the art can realize the function of this device based on existing mature modules. Those skilled in the art can make specific settings or purchases according to specific product parameters and usage needs, as long as the purpose of this utility model can be achieved.

[0042] Furthermore, the thin-film pressure sensor 7 is disposed on two opposite sides of the contouring part 6, that is, the thin-film pressure sensor 7 covers the left and right ends and part of the front and rear sides, so that the sensing area covers the main force-bearing surfaces on which the gripper or fixture applies pressure in different directions. When the clamping mechanism applies pressure to the contouring part 6 from either side, the thin-film pressure sensor 7 on the corresponding side can generate a change in resistance or capacitance, which is read in real time by the signal acquisition module 8, realizing independent detection of pressure on both sides.

[0043] Furthermore, the end face of the magnet remains flush with its side surface, preventing it from protruding outwards. This ensures that the overall shape of the contoured part 6 is completely consistent with the sidewall of the actual battery cell, without affecting its compatibility with production line grippers and fixtures. It also does not affect the connection between magnets achieved through magnetic attraction. Simultaneously, this structure maintains a flat side surface, ensuring that the clamping force is evenly distributed on the surface of the contoured part 6 under pressure, eliminating abnormal force caused by localized protrusions. This results in more accurate and reliable data collected by the pressure sensor.

[0044] Furthermore, such as Figure 6 As shown, the contouring component 6 is a rectangular block with multiple magnets on at least two opposite sides. The magnets on the opposite sides are arranged in a front-to-back correspondence, with their outer magnetic poles facing opposite directions. The magnets on each opposite side are arranged in a front-to-back correspondence, meaning that corresponding magnets on the front and back sides are located on the same straight line perpendicular to the front and back sides. This ensures that when two contouring components 6 are attracted together by the magnets on their front and back sides, their front and back sides precisely overlap. In this embodiment, four magnets are provided on each of the front and back sides of the contouring component 6.

[0045] Furthermore, the magnet is a cylindrical magnet with a through hole in the middle. The magnet is located inside the hole of the screw 11, and the screw 11 passes through the through hole and connects to it. This structure uses the screw 11 to provide reliable mechanical positioning and fixation, preventing the magnet from loosening, shifting, or falling off under pressure or attraction, thus improving the stability of the magnetic connection. The cylindrical magnet is easy to install and has precise positioning, and the through-hole design does not affect the magnetic force output of the magnet.

[0046] Furthermore, a storage cavity is provided inside the contouring component 6, and a counterweight is placed inside the storage cavity, allowing the total mass of the contouring component 6 to be adjusted as needed. By adjusting the material or number of the counterweights, the weight of the contouring component 6 can be made consistent with the actual battery cell or meet specific process requirements, thereby more realistically reflecting the force exerted by the equipment on battery cells of different masses during simulated clamping, pushing, or conveying processes. The counterweight structure is located inside the contouring component 6 and does not affect its external outline or magnetic attraction function.

[0047] Furthermore, the multiple storage cavities are symmetrically located on both sides of the contouring component 6. A counterweight can be placed in each storage cavity to ensure that the weight of the contouring component 6 is evenly distributed laterally, thereby ensuring balanced force during clamping or pushing and avoiding tilting or abnormal local force due to center of gravity shift.

[0048] Furthermore, such as Figure 7As shown, the contour piece 6 has a slot, in which a plug-in block 12 can be detachably installed. A storage cavity is provided on the plug-in block 12, which is equivalent to a small drawer. The storage cavity is equivalent to a compartment 13 inside the small drawer. A configuration block 14 is placed in the compartment 13. The plug-in block 12 and the slot can be connected by a device that facilitates joining or separating. For example, a fifth magnet 5 can be provided at the bottom of the slot, and another magnet or iron block 15 can be provided at the position of the plug-in block 12 corresponding to the position of the fifth magnet. This allows the plug-in block 12 to be temporarily fixed to the slot through magnetic attraction, preventing the plug-in block 12 from detaching from the slot. At the same time, a pull ring or button 16 can be provided at the end of the plug-in block 12 located outside the slot to facilitate the pulling out of the plug-in block 12. Through the detachable design of the plug-in block 12, the position or number of counterweights inside the contour piece 6 can be flexibly adjusted, thereby changing the weight and center of gravity distribution of the contour piece 6 to adapt to the simulation requirements of battery cells of different specifications or qualities.

[0049] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A device for simulating and detecting compressive load on a battery cell, comprising a contoured component having the same external outline as the battery cell, wherein a pressure sensor is disposed on the contoured component, and the pressure sensor is located at the position where the battery cell is subjected to compressive load, characterized in that, The side of the contoured part is provided with several magnets, which are symmetrically distributed about the symmetry line of the side where the magnets are located. The magnetic poles of two symmetrical magnets facing outwards are opposite.

2. The cell pressure load simulation testing device according to claim 1, characterized in that, The pressure sensor is a thin-film pressure sensor, and the conformal component is equipped with a signal acquisition module and a wireless signal transmission module connected to the pressure sensor.

3. The cell pressure load simulation testing device according to claim 2, characterized in that, The thin-film pressure sensor is covered on both opposite sides of the contoured part.

4. The cell pressure load simulation testing device according to claim 1, characterized in that, The end face of the magnet is flush with the side face on which it is located.

5. The cell pressure load simulation testing device according to claim 1, characterized in that, The contouring component is a rectangular block, with at least two opposite sides each having several magnets.

6. The cell pressure load simulation testing device according to claim 5, characterized in that, The magnets on the two opposite sides are aligned front to back and the magnetic poles on the outer sides face opposite directions.

7. The cell pressure load simulation testing device according to claim 1, characterized in that, The magnet is a cylindrical magnet with a through hole in the middle. The magnet is located inside the screw hole, and the screw passes through the through hole and connects to the screw hole.

8. The cell pressure load simulation testing device according to claim 1, characterized in that, The conforming part has a storage cavity, and a counterweight is placed in the storage cavity.

9. The cell pressure load simulation testing device according to claim 8, characterized in that, The multiple storage cavities are symmetrically located on both sides of the contour piece.

10. The cell pressure load simulation testing device according to claim 9, characterized in that, The contoured part is provided with a slot, the slot is provided with an insert block, and the storage cavity is provided on the insert block.

Images