Multi-angle vacuum press test apparatus

Abstract

The utility model provides a kind of multi-angle vacuum compression test equipment, the equipment includes receiving and releasing device, inclination angle hot-press testing device, conveying belt, driving device and the first vacuum chamber of containing the inclination angle hot-press testing device, the conveying belt of above-mentioned is by receiving and releasing device at least one battery core to be measured to inclination angle hot-press testing device, carries out heating compression test of different inclination angle, to obtain better battery core process parameter, and the battery core to be measured of complete test is conveyed to the receiving and releasing device and is received, the conveying belt of above-mentioned is driven to run between the receiving and releasing device and the inclination angle hot-press testing device using driving device.

Description

Technical Field

[0001] This utility model relates to a testing device for battery pressure testing, and more particularly to a multi-angle vacuum pressing testing device that can provide multi-angle positioning testing. Background Technology

[0002] In response to the booming development of the new energy vehicle market, power batteries, as one of the three core technologies of new energy electric vehicles, are considered a crucial aspect of the structural protection design and thermal management planning of power batteries. Before assembly, power batteries need to undergo a formation process to activate the battery cells that make up the power battery. The most common current formation method is pressure formation, which involves maintaining the battery cells under a certain pressure during formation. By applying pressure, it is possible to effectively prevent the gases generated during the formation process from causing inconsistencies in the spacing between the positive electrode, the separator, and the negative electrode, thus hindering the transport of lithium ions from the positive electrode to the negative electrode. Furthermore, it helps the electrolyte to fully impregnate the active materials during the formation process, thereby optimizing battery performance.

[0003] However, existing hot-pressing processes, such as the aforementioned pressure formation or the welding and pressing of separately assembled bonding materials, all involve placing the battery cell horizontally. They do not consider the various factors affecting the electrochemical performance of the battery cell, including the fluid within the cell under its own weight, external pressure, and gases generated during heating. These factors include the fluid's influence on the active material's wetting, the interface between the electrode layer and the separator, and the ion conductivity of the separator. Examples of such fluids include liquid or colloidal electrolytes.

[0004] In view of the deficiencies in the existing technology, this utility model proposes a multi-angle vacuum pressing test device to effectively solve the above problems. Utility Model Content

[0005] The main purpose of this invention is to provide a multi-angle vacuum pressing test device, which can add a rotating module to the tilt angle hot pressing device to detect the electrical state of the battery cell under hot pressing at various angles, so as to obtain better battery cell process parameters.

[0006] This utility model proposes a multi-angle vacuum pressing test device, which includes: a feeding and receiving device; an inclined angle hot pressing test device; a conveyor belt, which transports at least one battery cell to be tested from the feeding and receiving device to the inclined angle hot pressing test device for hot pressing tests at different inclined angles, and transports the tested battery cell to the feeding and receiving device for receiving; a driving device, which drives the conveyor belt to run between the feeding and receiving device and the inclined angle hot pressing test device; and a first vacuum chamber, which houses the inclined angle hot pressing test device.

[0007] Preferably, the tilt angle hot-pressing testing device includes: an airbag seat, which includes: a movable upper pressure plate; a fixed heat-conducting lower pressure plate, which is disposed corresponding to the upper pressure plate, and there is a gap between the upper pressure plate and the lower pressure plate to allow the conveyor belt to carry the battery cell under test through; a pressurizing airbag, which is disposed on the top surface of the upper pressure plate away from the lower pressure plate, and the pressurizing airbag can expand and push the upper pressure plate to move towards the lower pressure plate to press the battery cell under test located in the gap; a heating device, which is disposed on the bottom surface of the lower pressure plate to heat the battery cell under test by means of the lower pressure plate; and a tilt angle rotation module, which can drive the airbag seat to rotate to a preset tilt angle.

[0008] Preferably, the tilt angle rotation module is a speed reducer.

[0009] Preferably, the reducer is a worm gear reducer.

[0010] Preferably, the reducer is a planetary reducer.

[0011] Preferably, the feeding and receiving device, the tilt angle hot pressing test device, and the drive device are each equipped with at least two conveyor rollers for conveying the conveyor belt.

[0012] Preferably, the two conveyor rollers of the tilt angle hot pressing test device are respectively located at both ends of the lower pressure plate, which are the input end where the conveyor belt approaches the gap and the output end where the conveyor belt moves away from the gap.

[0013] Preferably, the first vacuum chamber also houses the material receiving and discharging device, the conveyor belt, and the drive device.

[0014] Preferably, the first vacuum chamber also houses the drive device.

[0015] Preferably, the device further includes a second vacuum chamber and a bridging vacuum chamber, the second vacuum chamber being accommodated by the material receiving and discharging device, and the bridging vacuum chamber bridging the first vacuum chamber and the second vacuum chamber.

[0016] The following detailed description through specific embodiments will make it easier to understand the purpose, technical content, features and effects achieved by this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the multi-angle vacuum pressing test equipment of this utility model.

[0018] Figure 2A , 2B This is a schematic diagram showing the transfer of the battery cell under test in the multi-angle vacuum pressing test equipment of this utility model.

[0019] Figure 3A , 3B This is a schematic diagram of the tilt angle hot pressing test device of the multi-angle vacuum pressing test equipment of this utility model.

[0020] Figures 4A-4E This is a schematic diagram of the rotation of the tilt angle hot pressing test device of the multi-angle vacuum pressing test equipment of this utility model.

[0021] Figure 5A , 5B This is a schematic diagram of different states of the vacuum chamber of the multi-angle vacuum pressing test equipment of this utility model.

[0022] Figure Labels

[0023] 10. Material receiving and unloading device

[0024] 11 First Conveyor Roller

[0025] 12 Second conveyor roller

[0026] 13 Third Conveyor Roller

[0027] 131 Flexible Adjustment Component

[0028] 20 Drive unit

[0029] 21 Driver Source

[0030] 22 Fourth conveyor roller

[0031] 23. Seventh Transport Wheel

[0032] 30 Tilting Angle Hot Press Testing Device

[0033] 31 Airbag Seat

[0034] 311 Upper pressure plate

[0035] 312 Lower pressure plate

[0036] 313 airbag

[0037] 314 Heating Module

[0038] 315 gap

[0039] 32 Fifth Transfer Wheel

[0040] 33. Sixth teleportation wheel

[0041] 40 Tilting Angle Rotation Module

[0042] 50 Vacuum Chamber

[0043] 51 First Vacuum Chamber

[0044] 52 Second Vacuum Chamber

[0045] 53 Bridging vacuum chamber

[0046] 54 Test vacuum chamber

[0047] 60 Conveyor Belt

[0048] 70 battery cells under test Detailed Implementation

[0049] To make the advantages, spirit, and features of this utility model more readily apparent, detailed descriptions and discussions will follow with reference to the embodiments and accompanying drawings. It should be noted that these embodiments are merely representative examples of this utility model and are not intended to limit the scope of implementation or protection of this utility model. The purpose of providing these embodiments is solely to make the disclosure of this utility model more thorough and easier to understand.

[0050] The terminology used in the various embodiments disclosed in this utility model is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments disclosed in this utility model. Unless explicitly indicated otherwise, the singular forms used also include the plural forms. Unless otherwise specified, all terms (including technical and scientific terms) used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments disclosed in this utility model pertain. The foregoing terms (such as those defined in a general-purpose dictionary) are to be interpreted as having the same meaning as in the context of the same technical field and are not to be interpreted as having an idealized or overly formal meaning unless explicitly defined in the various embodiments disclosed in this utility model.

[0051] For the multi-angle vacuum pressing test equipment disclosed in this utility model, please refer to [link / reference]. Figure 1 It mainly includes a feeding and receiving device 10, a drive device 20, an inclined angle hot pressing test device 30, a conveyor belt 60, and a vacuum chamber 50. Under the attraction of the drive device 20, the conveyor belt 60 feeds a test piece from the feeding and receiving device 10 to the inclined angle hot pressing test device 30 for hot pressing at various preset angles, and then returns to the feeding and receiving device 10 for unloading. The vacuum chamber 50 can accommodate the above-mentioned devices (feeding and receiving device 10, drive device 20, inclined angle hot pressing test device 30, inclined angle rotation module 40) and the conveyor belt 60.

[0052] In the configuration of the above-mentioned devices, the drive device 20 can be set on one side of the take-up and unload device 10, while the tilt angle hot pressing test device 30 is subsequently set on the other side of the drive device 20 away from the take-up and unload device 10. The conveyor belt 60 passes through the take-up and unload device 10, the drive device 20, and the tilt angle hot pressing test device 30 in sequence, and then passes back through the drive device 20 and the take-up and unload device 10 to form a closed loop. The drive device 20 mainly drives the operation of the conveyor belt 60 to move the conveyor belt 60 between the take-up and unload device 10 and the tilt angle hot pressing test device 30, so as to transport the test items loaded on the take-up and unload device 10 to the tilt angle hot pressing test device 30.

[0053] The take-up and unload device 10 has at least two conveyor rollers for setting the conveyor belt 60. As shown in the figure, the take-up and unload device 10 has three conveyor rollers, namely a first conveyor roller 11, a second conveyor roller 12, and a third conveyor roller 13. The first conveyor roller 11 and the third conveyor roller 13 form a plane for placing the conveyor belt 60, so that the test piece (e.g., a battery cell) can be placed (details to follow). The conveyor belt 60 on the first conveyor roller 11 extends to the drive device 20. The drive device 20 has a drive source 21 and a fourth conveyor roller 22. The drive source 21 is the main power source for the operation of the conveyor belt 60. The conveyor belt 60 from the first conveyor roller 11 of the take-up and unload device 10 passes through and is coupled to the drive source 21 of the drive device 20 to drive the conveyor belt 60 to move. Then, it passes through the fourth conveyor roller 22 of the drive device 20 and enters the tilt angle hot pressing test device 30.

[0054] The tilt angle hot pressing test device 30 has a fifth conveyor roller 32 and a sixth conveyor roller 33. The conveyor belt 60 from the fourth conveyor roller 22 of the drive device 20 is sequentially connected to the fifth conveyor roller 32 and the sixth conveyor roller 33, and then returns to the seventh conveyor roller 23 of the drive device 20 before entering the take-up and unload device 10. The take-up and unload device 10 receives the conveyor belt 60 through the second conveyor roller 12 and then loops back to the third conveyor roller 13 to form a closed loop. The first conveyor roller 11 of the take-up and unload device 10, the fourth conveyor roller 22 of the drive device 20, the fifth and sixth conveyor rollers 32 and the sixth conveyor roller 33 of the tilt angle hot pressing test device 30, the seventh conveyor roller 23 of the drive device 20, and the second and third conveyor rollers 12 and 13 of the take-up and unload device 10 can maintain a certain tension on the conveyor belt 60 to transport the product.

[0055] Please refer to the following section. Figure 2AThe battery cell 70 to be tested is placed and fixed on the conveyor belt 60 between the first conveyor roller 11 and the third conveyor roller 13 of the receiving and unloading device 10. Then, the drive source 21 of the drive device 20 drives the conveyor belt 60 to move, thereby moving the battery cell 70 to be tested on it (see...). Figure 2B After passing over the fourth transmission roller 22 of the drive device 20, it enters the tilt angle hot pressing test device 30.

[0056] Please also refer to Figures 3A-3B The tilt angle hot-pressing test device 30 has an airbag seat 31 and a tilt angle rotation module 40. The airbag seat 31 includes a movable upper pressure plate 311, a fixed heat-conducting lower pressure plate 312, a pressurizing airbag 313, and a heating module 314. The fixed heat-conducting lower pressure plate 312 is set corresponding to the upper pressure plate 311, and there is a gap 315 between the upper pressure plate 311 and the lower pressure plate 312 so that the conveyor belt 60 carrying the battery cell 70 to be tested can pass through. The pressurizing airbag 313 is located on the top surface of the upper pressure plate 311 away from the lower pressure plate 312, and the pressurizing airbag 313 can expand and push the upper pressure plate 311 towards the lower pressure plate 312 to press the battery cell 70 to be tested. The heating module 314 is set on the bottom surface of the lower pressure plate 312 to heat the battery cell 70 to be tested by heating the lower pressure plate 312. The tilt angle rotation module 40 can drive the airbag seat 31 to rotate to a preset tilt angle, as shown in the figure. The fifth conveyor roller 32 and the sixth conveyor roller 33 mentioned above can be set at both ends of the lower pressure plate 312, which are the input end of the conveyor belt 60 approaching the gap 315 and the output end of the conveyor belt 60 away from the gap 315, respectively.

[0057] When the battery cell 70 under test enters the airbag seat 31 and is positioned, the airbag 313 will pressurize and expand, and then push the upper pressure plate 311 towards the lower pressure plate 312. The upper pressure plate 311 is movable and will press the battery cell 70 under test. The lower pressure plate 312 is located below the battery cell 70 under test and the conveyor belt 60. The lower pressure plate 312 is fixed. Therefore, when the airbag 313 expands, it will push the upper pressure plate 311 and press the battery cell 70 under test and the conveyor belt 60 between the upper pressure plate 311 and the lower pressure plate 312. Pressurization will stop when the predetermined pressure is reached. At this time, the airbag 313 will stop expanding. This predetermined pressure is the pressure set for the battery cell 70 under test. It will vary depending on the type and specifications of the battery, which will not be discussed further here.

[0058] Please refer to the following for further details. Figure 1 , 3B The tilt angle rotation module 40 of the tilt angle hot pressure testing device 30 can drive the airbag seat 31 to rotate, thereby rotating and positioning the airbag seat 31 in a vertical state (see Figure 4A), tilt angle 30 degrees (see) Figure 4B ), tilt angle 45 degrees (see Figure 4C ), tilt angle 60 degrees (see Figure 4D ), or horizontal state (see Figure 4E This allows for subsequent measurement of the electrical state of the battery cell 70 under test from various angles. The electrical state may include (but is not limited to) current, voltage, impedance, etc. Of course, the electrical test can also be a dynamic electrical test, that is, the electrical state can be monitored and tested in real time while the tilt angle rotation module 40 is continuously rotating.

[0059] The tilt angle rotation module 40 can be rotated using a common motor and gears; however, considering the weight of the tilt angle hot-press testing device 30, a speed reducer is preferable for the tilt angle rotation module 40, such as a worm gear reducer or a planetary reducer. Furthermore, considering the potential generation of air bubbles in the battery cell 70 during the pressurization test, the feeding / receiving device 10, the drive device 20, and the tilt angle hot-press testing device 30 are all housed within the vacuum chamber 50. Please refer to [link to relevant documentation]. Figure 1 This ensures that the entire pressure test is conducted in a vacuum. Furthermore, if the overall testing equipment is designed for continuous testing—in other words, the battery cells 70 to be tested can be placed at certain intervals to achieve continuous testing—the loading / unloading device 10 needs to continuously open the vacuum chamber 50 to place or remove the battery cells 70, which would consume considerable additional time and cost to maintain the vacuum state. Figure 5A As shown, the vacuum chamber 50 is designed to include a first vacuum chamber 51, a second vacuum chamber 52, and a bridging vacuum chamber 53. The first vacuum chamber 51 houses the material receiving / unloading device 10, the second vacuum chamber 52 houses the drive device 20, the tilt angle hot-pressing test device 30, and the tilt angle rotation module 40, and the bridging vacuum chamber 53 bridges the first vacuum chamber 51 and the second vacuum chamber 52 to house the conveyor belt 60 between the material receiving / unloading device 10 and the drive device 20. Therefore, during material feeding and discharging (placing or removing the battery cell 70 under test), only the first vacuum chamber 51 will experience vacuum breaking, significantly reducing the time and cost required to maintain vacuum. On the other hand, the purpose of considering the vacuum chamber is mainly to address the possibility of air bubbles being generated in the battery cell 70 under test during the pressurized testing process. Therefore, if... Figure 5B As shown, it is also possible to have only a test vacuum chamber 54 to accommodate the tilt angle hot pressure test device 30.

[0060] Continue back Figure 1 , 3A-3B, After the test is completed, the airbag 313 will release pressure and the heating module 314 will stop heating. Then, the tested battery cell 70 will be conveyed by the conveyor belt 60 through the seventh transmission roller 23 of the drive device 20 and enter the take-up and unload device 10. After passing through the second transmission roller 12 and the third transmission roller 13 of the take-up and unload device 10, it will return to the initial position for removal. In addition, considering that the rotation of the tilt angle hot pressing test device 30 may affect the tension of the conveyor belt 60, an elastic adjustment component 131 can be added to one side of the third transmission roller 13 of the take-up and unload device 10. This component can adjust the overall tension of the conveyor belt 60 and also provide a downward thrust to the third transmission roller 13 under normal conditions, so that the tension of the conveyor belt 60 is maintained within a suitable range and is not affected by the rotation of the tilt angle hot pressing test device 30.

[0061] In summary, this utility model proposes a multi-angle vacuum pressing test device, which has an inclined angle hot pressing test device to drive the battery cell under test to rotate to a preset angle for hot pressing test. Therefore, it can detect the electrical state of the battery cell at various angles to obtain better battery cell process parameters.

[0062] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Therefore, all equivalent variations or modifications made in accordance with the features and spirit described in the scope of protection of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A multi-angle vacuum pressing test device, characterized in that, The device includes: A material receiving and discharging device; A tilt angle hot-pressing test device; A conveyor belt transports at least one battery cell to be tested to the tilt angle hot pressing test device via the take-up and release device, performs hot pressing tests at different tilt angles, and then transports the tested battery cell to the take-up and release device for collection. A drive unit that drives the conveyor belt between the unloading / receiving device and the tilt angle hot pressing test device; and A first vacuum chamber, which houses the tilt angle hot-pressure testing device.

2. The multi-angle vacuum pressing test equipment according to claim 1, characterized in that, The tilt angle hot-press testing device includes: An airbag housing, the airbag housing comprising: A movable upper pressure plate; A fixed, heat-conducting lower pressure plate is provided corresponding to the upper pressure plate. There is a gap between the upper pressure plate and the lower pressure plate so that the conveyor belt can carry the battery cell to be tested through it. A pressurized airbag is disposed on the top surface of the upper pressure plate away from the lower pressure plate. The pressurized airbag can inflate and push the upper pressure plate towards the lower pressure plate to press the battery cell under test located in the gap; and A heating device is disposed on the bottom surface of the lower pressure plate to heat the battery cell under test via the lower pressure plate; and A tilt angle rotation module can drive the airbag seat to rotate to a preset tilt angle.

3. The multi-angle vacuum pressing test equipment according to claim 2, characterized in that, The tilt angle rotation module is a speed reducer.

4. The multi-angle vacuum pressing test equipment according to claim 3, characterized in that, The reducer is a worm gear reducer.

5. The multi-angle vacuum pressing test equipment according to claim 3, characterized in that, The reducer is a planetary reducer.

6. The multi-angle vacuum pressing test equipment according to claim 2, characterized in that, The feeding and receiving device, the tilt angle hot pressing test device, and the drive device are each equipped with at least two conveyor rollers for conveying the conveyor belt.

7. The multi-angle vacuum pressing test equipment according to claim 6, characterized in that, The two conveyor rollers of the tilt angle hot pressing test device are respectively located at both ends of the lower pressure plate, which are the input end where the conveyor belt approaches the gap and the output end where the conveyor belt moves away from the gap.

8. The multi-angle vacuum pressing test equipment according to claim 1, characterized in that, The first vacuum chamber also houses the material receiving and unloading device, the conveyor belt, and the drive device.

9. The multi-angle vacuum pressing test equipment according to claim 1, characterized in that, The first vacuum chamber also houses the drive unit.

10. The multi-angle vacuum pressing test equipment according to claim 1, characterized in that, The device also includes a second vacuum chamber and a bridging vacuum chamber. The second vacuum chamber is used to house the feeding and receiving device, and the bridging vacuum chamber bridges the first vacuum chamber and the second vacuum chamber.

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