Detection device for battery pole piece

Abstract

The utility model discloses a detection device for a battery pole piece, and the detection device comprises an adsorption platform which is also provided with a vacuum suction hole for fixing the battery pole piece to be detected; the area detection assembly is used for acquiring the area of the battery pole piece through a non-direct contact sensor; the weight detection assembly is arranged on the lower side of the adsorption platform so as to detect the weight of the battery pole piece; and the control module is electrically connected with the area detection assembly and the weight detection assembly, receives the area data and the weight data of the battery pole piece, and calculates the mass of the active substance in the battery pole piece. The detection device is provided with the area detection assembly, the weight detection assembly and the control module which are electrically connected with one another, and the weight and the area of the battery pole piece on the adsorption platform are detected and calculated, so that the mass of an active substance in the battery pole piece is obtained. Therefore, in the battery production process, the battery capacity can be obtained without division, the battery production process is simplified, and the production efficiency is improved.

Description

Technical Field

[0001] This disclosure generally relates to the field of battery manufacturing technology. More specifically, this disclosure relates to a testing device for battery electrodes. Background Technology

[0002] In the battery manufacturing process, battery electrodes coated with active material layers are typically stacked to form electrode cores, which are then further assembled into finished batteries. The capacity of the finished battery is usually calculated by performing multiple charge-discharge cycles after electrolyte injection. However, during charging, heat dissipation can lead to energy waste, and multiple charge-discharge cycles can also extend production time.

[0003] In view of this, there is an urgent need to provide a testing device for battery electrodes in order to reduce the time and cost in the battery capacity testing process. Utility Model Content

[0004] In order to at least address one or more of the technical problems mentioned above, this disclosure proposes a detection device for battery electrodes.

[0005] This disclosure provides a testing device for battery electrodes, comprising: an adsorption platform, the adsorption platform further having vacuum suction holes for fixing the battery electrode to be tested; an area detection component for acquiring the area of ​​the battery electrode located on the adsorption platform through a non-direct contact sensor; a weight detection component disposed below the adsorption platform for detecting the weight of the battery electrode; and a control module electrically connected to the area detection component and the weight detection component to receive the area data and weight data of the battery electrode and calculate the mass of the active material in the battery electrode.

[0006] In some embodiments, the area detection component includes an ultrasonic sensor disposed below the adsorption platform.

[0007] In some embodiments, a detection camera is also included, which is positioned above the adsorption platform to acquire top-down images of the battery electrodes.

[0008] In some embodiments, the weight detection component is disposed below the area detection component; or, in some embodiments, the weight detection component is disposed on the horizontal side of the area detection component.

[0009] In some embodiments, the adsorption platform is further provided with a vacuum connection hole that is connected to the vacuum suction hole, and the vacuum connection hole is used to connect to the negative pressure device.

[0010] In some embodiments, the adsorption platform is provided with a plurality of first vacuum suction holes arranged corresponding to the battery electrode body, and a plurality of second vacuum suction holes arranged corresponding to the battery electrode tabs. The adsorption platform also has a first connecting cavity and a second connecting cavity, the first connecting cavity connecting the plurality of first vacuum suction holes and vacuum connection holes, and the second connecting cavity connecting the plurality of second vacuum suction holes and the first connecting cavity.

[0011] In some embodiments, the system further includes an alignment component, which includes a first adjustment platform, a second adjustment platform, and a third adjustment platform arranged sequentially in a vertical direction. The first adjustment platform is movable relative to the second adjustment platform in a first horizontal direction, and the second adjustment platform is movable relative to the third adjustment platform in a second horizontal direction perpendicular to the first horizontal direction.

[0012] In some embodiments, a first rack extending along a first horizontal direction is provided on the lower side of a first adjustment platform, a second rack extending along a second horizontal direction is provided on the lower side of a second adjustment platform, and a first gear drive device is provided on one side of the second horizontal direction of the second adjustment platform, the first gear of the first gear drive device meshing with the first rack, and a second gear drive device is provided on one side of the third adjustment platform along the first horizontal direction, the second gear of the second gear drive device meshing with the second rack.

[0013] In some embodiments, a rotation adjustment mechanism is also included, which is disposed on the bottom side of the third adjustment platform, and the rotation adjustment mechanism is used to drive the third adjustment platform to rotate.

[0014] In some embodiments, the device further includes an electrode conveying device, which includes a robotic arm with multiple movable joints and a vacuum suction cup fixedly disposed at the movable end of the robotic arm.

[0015] By using the detection device for battery electrodes provided above, this embodiment of the present disclosure sets up an area detection component, a weight detection component, and a control module that are electrically connected to each other, and detects and calculates the weight and area of ​​the battery electrodes on the adsorption platform to obtain the mass of the active material in the battery electrodes. In the battery production process, the battery capacity can be obtained without dividing the material, thereby simplifying the battery production process and improving production efficiency. Attached Figure Description

[0016] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0017] Figure 1 An exemplary exploded view of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown;

[0018] Figure 2 An exemplary perspective view of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown;

[0019] Figure 3 An exemplary perspective view of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown;

[0020] Figure 4 An exemplary cross-sectional view of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown;

[0021] Figure 5 An exemplary cross-sectional view of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown;

[0022] Figure 6 An exemplary cross-sectional view of the adsorption platform of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown;

[0023] Figure 7 An exemplary cross-sectional view of the adsorption platform of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown;

[0024] Figure 8 An exemplary workflow block diagram of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown;

[0025] Figure 9 An exemplary side view of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100 – Detection device; 11 – Adsorption platform; 111 – First vacuum suction port; 112 – Vacuum connection port; 113 – First communicating cavity; 114 – Second vacuum suction port; 115 – Second communicating cavity; 20 – Area detection assembly; 200 – Detection device; 30 – Weight detection assembly; 300 – Machine base; 40 – Alignment assembly; 400 – Electrode conveying equipment; 41 – First adjustment platform; 413 – First rack; 42 – Second adjustment platform; 421 – First guide rail assembly; 4211 – First linear guide rail; 4212 – First slider; 422 – First gear drive device; 4221 – First motor; 4222 – First gear; 423 – Second rack; 424 – First motor mount; 43 – Third adjustment platform; 431 – Second guide rail assembly; 4311 – Second linear guide rail; 4312 – Second slider; 432 – Second gear drive device; 4321 – Second motor; 4322 – Second gear; 433 – Second motor mount; 44 – Rotation adjustment mechanism; 50 – Control module; 80 – Detection camera; 90 – Battery electrode; 91 – Electrode body; 92 – Tab. Detailed Implementation

[0028] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0029] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0030] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0031] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0032] See Figure 1 and Figure 2 , Figure 1 An exemplary exploded view of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown; Figure 2 An exemplary perspective view of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown.

[0033] In some embodiments, the detection device 100 for battery electrodes may include an adsorption platform 11, an area detection component 20, and a weight detection component 30. The adsorption platform 11 is used to fix the battery electrode 90, the area detection component 20 is used to detect the area of ​​the battery electrode 90, and the weight detection component 30 is used to detect the weight of the battery electrode 90. The detection device 100 may further include a control module 50, which is electrically connected to the area detection component 20 and the weight detection component 30, to receive area data and weight data of the battery electrode 90 and calculate the mass of the active material in the battery electrode 90.

[0034] Specifically, in some embodiments, the battery electrode 90 can be, for example, a positive electrode for a pouch lithium battery. After stacking multiple positive electrodes, a separator, and negative electrodes, the multiple positive electrodes are connected, and the multiple negative electrodes are connected. Finally, the entire assembly is encapsulated and injected with electrolyte to form an electrode core. Multiple electrode cores can then be further connected and encapsulated to form a finished pouch lithium battery. Each battery electrode 90, serving as a positive electrode, can include an electrode body 91 and a tab 92. The electrode body 91 can include a metal foil and an active material layer disposed on the surface of the metal foil. The tab 92 can be formed by extending outward from one horizontal side of the metal foil of the electrode body 91 to serve as a connection terminal for connecting multiple battery electrodes 90 to each other. The active material layer reacts with the electrolyte for charging and discharging, and the total weight of the active material is positively correlated with the overall capacity of the battery. Therefore, by measuring, summing, and converting the weight of the active material on each battery electrode into its corresponding capacity, the total capacity of the finished battery can be calculated.

[0035] In some embodiments, the adsorption platform 11 may be generally rectangular, and the battery electrode 90 can be transported to the upper surface of the adsorption platform 11 by an external conveying device during testing, so that the electrode body 91 and the tab 92 are in contact with the adsorption platform 11. The adsorption platform 11 may be provided with multiple vacuum suction holes, or other mechanisms for adsorption or fixation, to secure the battery electrode 90. The area detection component 20 may be located on the vertically lower side of the adsorption platform 11. This area detection component 20 can, for example, detect objects of a specific material or size within the detection area on its vertically upper side to obtain area data representing its size. Similarly, the weight detection component 30 may be located on the lower side of the adsorption platform 11, and it is used to measure the weight of the battery electrode 90 when it is placed to obtain weight data representing its size. After acquiring the corresponding measurement data, the area detection component 20 and the weight detection component 30 can transmit the measurement results to the control module 50 through their respective electrical connections. The control module 50 then calculates the weight of the active material on the battery electrode 90 based on the measurement results, using its preset calculation formula and the weight-to-area ratio of the metal foil stored internally.

[0036] In some embodiments, the area detection component 20 may include an area detection sensor, such as an ultrasonic area detection sensor. By selecting the parameters and detection method of the ultrasonic area detection sensor, it can be adapted to detect the material and size of the battery electrode 90 under test. For example, when the electrode body 91 and electrode tab 92 in the battery electrode 90 include metal foil, the ultrasonic area detection sensor can be configured to detect the metal foil, and its detection area can be larger than the projected area of ​​the battery electrode 90 in the vertical direction. The ultrasonic area detection sensor can, for example, be disposed on the lower side of the adsorption platform 11 and configured to have its detection end facing upward in the vertical direction to detect the projected area of ​​the battery electrode 90 in the vertical direction when it is laid on the upper side of the adsorption platform 11. Those skilled in the art will understand that this disclosure does not limit the type of area detection sensor actually used in the area detection component 20 or its specific arrangement. For example, other detection devices such as visual inspection devices can also be used to detect the area of ​​the battery electrode 90. In some embodiments, the weight detection component 30 may include a weight detection sensor, such as a high-precision capacitive weighing sensor.

[0037] See Figure 3 , Figure 3An exemplary perspective view of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown. In some embodiments, the detection apparatus for battery electrodes may further include a detection camera 80, which may be, for example, a CCD camera for capturing visible light images. The detection camera 80 may be fixedly mounted on the vertical upper side of the adsorption platform 11, with its lens facing the adsorption platform 11 in the vertical direction, for acquiring a top-view image of the battery electrode 90 on the adsorption platform 11 when the battery electrode 90 is placed on the upper side of the adsorption platform 11. In some embodiments, the detection camera 80 may be electrically connected to a control module 50 and transmit the top-view image to the control module 50. The control module 50 may include pre-stored image analysis algorithms and standard position data of the battery electrode. In response to the transmission of the projected image from the CCD camera, the control module 50 analyzes the projected image to determine whether the battery electrode 90 is placed in a predetermined position or whether it is tilted on the adsorption platform 11.

[0038] In some embodiments, the area detection component may include, for example, a CCD camera, which measures the projected area of ​​the battery electrode 90 in the vertical direction. Specifically, the CCD camera first acquires a projected image of the battery electrode 90 in the vertical direction and transmits the projected image to the control module 50. The control module 50 may have pre-stored image recognition algorithms and area calculation algorithms. In response to the transmission of the projected image from the CCD camera, the control module 50 analyzes and identifies the projected image using the image recognition algorithm to determine the outline range of the battery electrode. Further, the control module 50 uses the area calculation algorithm to calculate the area of ​​the outline range of the battery electrode 90, thereby obtaining the area data of the battery electrode 90. In addition, in some embodiments, the CCD camera may also measure the projected area of ​​the battery electrode 90 together with other area measurement sensors in the area detection component 20, and the measurement results are compared and adjusted by verifying the detection data measured by other area measurement sensors to further improve the accuracy of the measurement results.

[0039] Those skilled in the art will understand that although the above description shows a configuration where a CCD camera is positioned vertically above the adsorption platform 11 to obtain a top-down image of the battery electrode 90, this disclosure does not limit the specific configuration of the CCD camera. For example, the CCD camera could also be positioned vertically below the adsorption platform, and the adsorption platform could be made of a transparent material. The CCD camera could be arranged horizontally alongside the area detection component 20 and / or the weight detection component 30, with the CCD camera lens facing upwards towards the battery electrode 90 to obtain a bottom-up image of the battery electrode 90. This allows for a more compact layout of the detection device and provides greater movement space for the conveying device used to transport the battery electrode 90.

[0040] See Figure 4 , Figure 4 An exemplary cross-sectional view of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown. In some embodiments, an adsorption platform 11, an area detection component 20, and a weight detection component 30 are stacked sequentially and adjacent to each other in a vertical direction. The bottom side of the adsorption platform 11 abuts against the upper surface of the area detection component 20, and the bottom side of the area detection component 20 abuts against the upper surface of the weight detection component 30, such that the area where the battery electrode 90 is placed on the adsorption platform 11 and the detection area of ​​the area detection component 20 overlap vertically. This allows the weight of the battery electrode 90 to be transferred to the weight detection component 30 through the adsorption platform 11 and the area detection component 20. Therefore, this detection apparatus can simultaneously detect the area and weight of the battery electrode 90 with a compact arrangement, achieving high detection efficiency and occupying little space.

[0041] In some embodiments, such as when the area detection component 20 employs a high-precision sensor like an ultrasonic area detection sensor, the material and size of the adsorption platform 11 can be adjusted according to the sensor's usage requirements. For example, the adsorption platform 11 can be a thin plate made of acrylic material to ensure good transmission of the detection ultrasonic waves. Furthermore, positioning grooves or protrusions corresponding to the contour of the battery electrode 90 can be provided on the upper surface of the adsorption platform 11 to pre-position the battery electrode 90 when it is placed on the adsorption platform 11, reducing the probability of the battery electrode 90 becoming misaligned on the adsorption platform 11.

[0042] See also Figure 1 and Figure 2 In some embodiments, the detection device may further include an alignment component 40. The alignment component 40 is used to adjust the position and setting angle of the battery electrode 90 when it shifts, so as to facilitate corresponding detection, handling, stacking, and other processing. The alignment component 40 may include an adjustment component for supporting and adjusting the positions of the adsorption platform 11, the area detection component 20, and the weight detection component 30. The adjustment component may include a first adjustment platform 41, a second adjustment platform 42, and a third adjustment platform 43 arranged sequentially in a vertical direction. The first adjustment platform 41 is movable relative to the second adjustment platform 42 in a first horizontal direction, and the second adjustment platform 42 is movable relative to the third adjustment platform 43 in a second horizontal direction perpendicular to the first horizontal direction.

[0043] Specifically, the first adjustment platform 41, the second adjustment platform 42, and the third adjustment platform 43 are stacked vertically in sequence, and each can include a platform body that is generally plate-shaped. A first rack 413 is provided on the lower vertical side of the platform body of the first adjustment platform 41, and a first gear drive device 422 corresponding to the first rack 413 is provided on one horizontal side of the platform body of the second adjustment platform 42. Simultaneously, a first guide rail assembly 421 is provided on the upper vertical side of the second adjustment platform 42, which supports the first adjustment platform 41 and guides it along the first horizontal direction. Similarly, a second rack 423 is provided on the lower vertical side of the platform body of the second adjustment platform 42, and a second gear drive device 432 corresponding to the second rack 423 is provided on one horizontal side of the platform body of the third adjustment platform 43. Meanwhile, a second guide rail assembly 431 is also provided on the vertical upper side of the third adjustment platform 43. The second guide rail assembly 431 is used to support the second adjustment platform 42 and guide the second adjustment platform 42 along the second horizontal direction perpendicular to the first horizontal direction.

[0044] Both the first gear drive device 422 and the second gear drive device 432 may include a motor for providing driving force and a gear disposed on the output shaft of the motor. The motor of the first gear drive device 422 is fixedly disposed on one side of the platform body of the second adjustment platform 42 in the horizontal direction, and the gear of the first gear drive device 422 meshes with the first rack 413. Similarly, the motor of the second gear drive device is fixedly disposed on one side of the platform body of the third adjustment platform 43 in the horizontal direction, and the gear of the second gear drive device 432 meshes with the second rack 423. Both the first guide rail assembly 421 and the second guide rail assembly 431 may be assemblies composed of linear guide rails and sliders. The first rack 413 and the first guide rail assembly 421 are disposed along the first horizontal direction, and the second rack 423 and the second guide rail assembly 431 are disposed along the second horizontal direction, so that the first gear drive device 422 and the second gear drive device 432 can drive the first adjustment platform 41 and the second adjustment platform 42 to move along the first horizontal direction and the second horizontal direction respectively through the meshing of their respective gears and corresponding racks.

[0045] More specifically, refer to Figure 1 and Figure 2As shown, in this embodiment, the adjustment assembly includes two first guide rail assemblies 421 that are parallel to each other and spaced apart along a second horizontal direction, and two second guide rail assemblies 431 that are parallel to each other and spaced apart along a first horizontal direction. Each first guide rail assembly 421 includes a first linear guide rail 4211 and a first slider 4212 disposed on and slidable along the first linear guide rail 4211. The first linear guide rail 4211 is fixedly mounted on the upper side of the second adjustment platform 42 by bolts or other fasteners, and the bottom side of the first adjustment platform 41 is fixedly connected to the upper side of the first slider 4212 by bolts or other fasteners. Similarly, each second guide rail assembly 431 includes a second linear guide rail 4311 and a second slider 4312 that is slidable along the second linear guide rail 4311. The second linear guide rail 4311 is fixedly mounted on the upper side of a third adjustment platform 43 by bolts or other fasteners, and the bottom side of the second adjustment platform 42 is fixedly mounted on the upper side of the second slider 4312 by bolts or other fasteners.

[0046] Further, see Figure 2 The first gear drive device 422 includes a first motor 4221 and a first gear 4222 fixedly connected to the output shaft of the first motor 4221. The second gear drive device 432 includes a second motor 4321 and a second gear 4322 fixedly connected to the output shaft of the second motor 4321. See also... Figure 1 and Figure 2 The second adjustment platform 42 has a first motor base 424 fixedly installed on one side along the second horizontal direction, extending outward. The body of the first motor 4221 is fixedly connected to the first motor base 424, and the output shaft of the first motor 4221 extends towards the second adjustment platform 42 along the second horizontal direction. The first gear 4222 is fixedly installed on the output shaft. The third adjustment platform 43 has a second motor base 433 fixedly installed on one side along the first horizontal direction. The second motor 4321 is fixedly installed on the second motor base 433, and the output shaft of the second motor 4321 extends towards the third adjustment platform 43 along the first horizontal direction. The second gear 4322 is fixedly installed on the output shaft.

[0047] The first rack 413 is disposed at the bottom of the first adjustment platform 41 on one side along the second horizontal direction and meshes with the first gear 4222. When the first gear 4222 rotates, the first adjustment platform 41 will slide along the first guide rail assembly 421 through the meshing of the first gear 4222 and the first rack 413, so that the first adjustment platform 41 can move relative to the second adjustment platform 42 along the first horizontal direction.

[0048] Similarly, the second rack 423 is disposed at the bottom of the second adjustment platform 42 on one side along the first horizontal direction and meshes with the second gear 4322. When the second gear 4322 rotates, the second adjustment platform 42 will slide along the second guide rail assembly 431 through the meshing of the second gear 4322 and the second rack 423, thereby allowing the second adjustment platform 42 to move relative to the third adjustment platform 43 along the second horizontal direction.

[0049] Furthermore, in some embodiments, the positive component 40 also includes a rotation adjustment mechanism 44, which is disposed on the bottom side of the third adjustment platform 43. The rotation adjustment mechanism 44 may include, for example, a rotary motor, a rotary cylinder, or other rotary drive device, which is used to drive the third adjustment platform 43 to rotate. Thus, the position and angle of the adsorption platform 11 can be changed along two different horizontal directions and rotational directions by the first gear drive device 422, the second gear drive device 432, and the rotation adjustment mechanism 44, thereby adjusting the position and angle of the battery electrode 90 disposed thereon, facilitating the execution of processes such as detection and conveying.

[0050] The drive devices for the first gear drive device 422, the second gear drive device 432, and the rotation adjustment mechanism 44 can all be configured as stepper motors or servo motors with controllable strokes, which can be controlled by electrical signals. Furthermore, the motors of the first gear drive device 422, the second gear drive device 432, and the rotation adjustment mechanism 44 can be electrically connected to the control module 50. The control module 50 is configured to, after analyzing the projected image obtained by the CCD camera, control the motors of the first gear drive device 422 and the second gear drive device 432 respectively in response to the analysis result, to move the adsorption platform and the battery electrodes on the platform along the first and second horizontal directions and / or rotational directions until the error between the platform and the pre-stored standard position data in the control module 50 is less than a preset allowable error value.

[0051] Those skilled in the art will understand that although the above description presents an embodiment in which the adsorption platform is adjusted along two different horizontal directions using a first gear drive device 422, a first rack 413, a second gear drive device 432, and a second rack 423, the present disclosure does not limit the specific adjustment method of the adsorption platform. For example, two mutually perpendicular guide rail screw assemblies can also be provided between the first adjustment platform 41 and the second adjustment platform 42, and between the second adjustment platform 42 and the third adjustment platform 43, and the adsorption platform can be adjusted by means of the drive of the guide rail screw assemblies. It is sufficient that the horizontal adjustment of the adsorption platform can be controlled by distance.

[0052] Furthermore, those skilled in the art will understand that although the above describes an arrangement in which the adsorption platform 11, the area detection component 20, and the weight detection component 30 are stacked sequentially in the vertical direction, this disclosure does not limit the specific arrangement of the adsorption platform, the area detection component, and the weight detection component.

[0053] For example, see Figure 5 , Figure 5 An exemplary cross-sectional view of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown. In some embodiments, the weight detection component 30 is disposed on one side of the area detection component 20 in the horizontal direction, rather than on the vertically lower side of the area detection component 20. Furthermore, the area detection component 20 is spaced apart from the bottom side of the adsorption platform 11, so that the upper surface of the area detection component 20 does not directly contact the adsorption platform 11. In this configuration, the area detection component 20 can use a non-contact area detection sensor to detect the area of ​​the battery electrode 90. Thus, the area detection sensor and the weight detection component 30 are independently configured, and the weight of the area detection sensor in the vertical direction and the entanglement of the related connecting mechanism will not affect the weight detection component 30's detection of the weight of the battery electrode 90, thereby reducing detection errors and further improving detection accuracy. In some other embodiments, the area detection component and the weight detection component can also be arranged in other forms; for example, multiple spaced-apart area detection sensors can be provided, and one or more weight detection sensors of the weight detection component can be disposed between the multiple area detection sensors.

[0054] See Figure 6 , Figure 6 An exemplary cross-sectional view of an adsorption platform 11 for a battery electrode detection apparatus according to some embodiments of this disclosure is shown. In some embodiments, the adsorption platform 11 may also be provided with one or more vacuum suction holes, the upper ends of which are vertically upward to be used for adsorbing and fixing the battery electrode 90 by means of negative pressure. The adsorption platform 11 is provided with one or more vacuum connection holes 112 communicating with the vacuum suction holes. One end of the one or more vacuum connection holes 112 is used to communicate with the lower end of the vacuum suction holes, while the other end can be used to penetrate the side of the adsorption platform 11 for connection with a negative pressure device.

[0055] Specifically, in some embodiments, the adsorption platform 11 may include, for example, a plurality of first vacuum suction holes 111 and second vacuum suction holes 114 arranged in an array at intervals. The plurality of first vacuum suction holes 111 correspond to the size and position of the electrode body 91 and together form a larger rectangular array, while the plurality of second vacuum suction holes 114 correspond to the size and position of the tab 92 and together form another smaller rectangular array. In the larger rectangular array, each horizontal row of first vacuum suction holes 111 can be interconnected via first connecting cavities 113 extending laterally within the adsorption platform 11. In the smaller rectangular array, each vertical column of second vacuum suction holes 114 can be interconnected via second connecting cavities 115 extending longitudinally within the adsorption platform 11. Each first connecting cavity 113 can be connected to a vacuum connection hole 112, and each second connecting cavity 115 can be connected to one of the plurality of first connecting cavities 113.

[0056] In addition, see Figure 7 , Figure 7 An exemplary cross-sectional view of an adsorption platform 11 for a battery electrode detection apparatus according to some embodiments of this disclosure is shown, wherein a plurality of first vacuum suction holes 111 and second vacuum suction holes 114 of the adsorption platform are interconnected in another manner. In some embodiments, the plurality of first vacuum suction holes 111 are arranged in a larger rectangular array corresponding to the size and shape of the electrode body 91, and the plurality of second vacuum suction holes 114 are correspondingly arranged in a smaller rectangular array corresponding to the size and shape of the tab 92. The plurality of first vacuum suction holes 111 are connected by a rectangular first connecting cavity 113 formed inside the adsorption platform 11, and similarly, the plurality of second vacuum suction holes 114 are connected by a rectangular second connecting cavity 115 formed inside the adsorption platform 11, with one horizontal side of the second connecting cavity 115 connected to the first connecting cavity 113. Therefore, when processing the first connecting cavity 113 and the second connecting cavity 115, it is not necessary to process a corresponding connecting cavity channel for each row or column of vacuum suction holes, thereby reducing the processing difficulty inside the adsorption platform 11 and decreasing the production cost of the detection apparatus.

[0057] In some embodiments, the adsorption platform 11 can be composed of two parts stacked vertically, wherein the first connecting cavity 113, the second connecting cavity 115, and the vacuum connection hole 112 can all be disposed at the junction of the two parts. Thus, the connecting cavity and the connection hole can be processed while the two parts are separated, and the complete first connecting cavity 113, second connecting cavity 115, and vacuum connection hole 112 are formed by snapping them together and sealing them, thereby reducing the overall processing difficulty. Those skilled in the art will understand that the positions and connections of the first vacuum suction hole 111, the second vacuum suction hole 114, the first connecting cavity 113, the second connecting cavity 115, and the vacuum connection hole 112 can be adaptively adjusted according to the actual shape and size of the corresponding battery electrode 90, as long as it can generate a stable adsorption force on the battery electrode 90 when connected to the vacuum device.

[0058] Figure 8 An exemplary workflow block diagram of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown. In some embodiments, the area detection component of the detection apparatus detects and collects area data of the battery electrodes, while the weight detection component detects and collects weight data of the battery electrodes. After data collection is completed, the area detection component and the weight detection component transmit the collected area data and weight data to a control module, respectively. The control module may be a computing processing device such as a PLC or industrial computer, and may include a calculation unit and a storage unit. The storage unit may store information such as the weight-to-area ratio of metal foil and algorithms for calculating the mass of active material. In response to the data transmission from the area detection component and the weight detection component, the calculation unit, using the data and calculation algorithms built into the storage unit, can calculate the weight of the metal foil based on the area data and weight data of the battery electrodes, and calculate the weight of the active material based on the total weight of the battery electrodes and the weight of the metal foil.

[0059] Furthermore, the calculation unit can be used to transmit the calculated weight of the active material contained in a single battery electrode to a storage unit for storage. The calculation unit can also retrieve the weight data of the active material corresponding to multiple battery electrodes constituting the same electrode core from the storage unit. By summing the active material weights of these multiple battery electrodes, the total amount of active material in the electrode core can be obtained. Furthermore, by summing the total weight of the active material in the multiple electrode cores constituting the battery, the total amount of active material in the corresponding battery can be obtained. Using the active material specific capacity standard calculated for a previous battery, the battery capacity can be calculated based on the total weight of the active material. In some embodiments, for each electrode core, the battery capacity corresponding to its total active material weight can be bound to a QR code set on the electrode core for easy identification in subsequent processes.

[0060] In some embodiments, the CCD camera can be electrically connected to the control module, which can drive the alignment component to move based on the top-view image of the battery electrode acquired by the CCD camera, to compensate for and correct errors in the placement or angle of the battery electrode. Specifically, the control module may further include an image recognition unit and a motion control unit. The image recognition unit receives the top-view image of the battery electrode acquired by the CCD camera and compares and analyzes it with standard position data of the battery electrode pre-stored in the image recognition unit. The motion control unit may include a driver for driving various driving devices, which converts received commands into control signals for driving motors.

[0061] After comparison, if the image recognition unit confirms that the top-view image has an error compared to the standard position data of the battery electrode, and / or the error exceeds its pre-stored error tolerance value, the image recognition unit can transmit error compensation data indicating the magnitude of the error to the motion control unit. The motion control unit then converts the error compensation data into drive signals for driving multiple drive devices of the alignment assembly. Under the control of the drive signals, the first gear drive device, the second gear drive device, and the drive device of the rotation adjustment mechanism of the alignment assembly perform corresponding actions to adjust the position and angle of the adsorption platform and the battery electrode set on it until the error between it and the standard position data pre-stored in the image recognition unit is less than the preset tolerance error value. Thus, automatic battery electrode position correction can be performed with the help of a CCD camera, control module, and alignment assembly. This position correction can be performed synchronously with the area measurement of the battery electrode, thereby reducing the probability of problems in the handling, inspection, or other processing steps caused by the positional deviation of the battery electrode without affecting production efficiency.

[0062] In some embodiments, the CCD camera can also cooperate with the control module to measure the area of ​​the battery electrode. For example, the image recognition unit can pre-store image recognition algorithms and area calculation algorithms. After the CCD camera acquires a top-view projected image of the battery electrode, it transmits the top-view projected image data to the image recognition unit. In response to the transmission of the projected image from the CCD camera, the control module analyzes and recognizes the projected image using the image recognition algorithm to determine the outline range of the battery electrode. Further, it uses the area calculation algorithm to calculate the area of ​​the outline range of the battery electrode, thereby obtaining the area data of the battery electrode. The image recognition unit can then transmit the area data to the calculation unit, which can compare the area data with the area data obtained by other area detection sensors and perform corresponding calculations to obtain the final area data. For example, the calculation unit can take the average of the area data obtained by the image recognition unit and the area data obtained by other area detection sensors, thereby reducing the errors that a single detection method may produce under different working environments and improving the accuracy of the area detection results.

[0063] The battery electrode detection device provided in this embodiment uses an electrically connected area detection component, a weight detection component, and a control module to detect and calculate the weight and area of ​​the battery electrode on the adsorption platform to determine the mass of the active material in the battery electrode. Therefore, in the battery production process, battery capacity can be determined without separation, thus simplifying the battery production process and improving production efficiency.

[0064] Figure 9 An exemplary side view of a detection apparatus for battery electrodes according to some embodiments of this disclosure is shown. The detection apparatus 200 according to some embodiments of this disclosure includes an adsorption platform 11, an area detection component 20, a weight detection component 30, and a control module 50 as described in the above embodiments. Furthermore, it includes a machine base 300 for fixing the detection apparatus and an electrode conveying device 400 for storing and conveying battery electrodes 90. The adsorption platform 11, area detection component 20, and weight detection component 30 can be fixedly mounted on the upper side of the machine base 300, while the electrode conveying device 400 includes a robotic arm 410 and a vacuum suction cup 420 for conveying the electrodes. The robotic arm 410 has multiple movable joints and is capable of moving horizontally or vertically to convey the battery electrodes 90. The vacuum suction cup 420 is fixedly mounted on the moving end of the robotic arm 410 and includes one or more vacuum holes to suck up and hold the battery electrodes 90 by negative pressure. Thus, the electrode conveying device 400 can place the battery electrode 90 to be tested on the adsorption platform 11, and remove the tested battery electrode 90 from the adsorption platform.

[0065] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A testing device for battery electrodes, characterized in that, include: An adsorption platform (11) is provided, and a vacuum suction hole is provided on the adsorption platform (11) for fixing the battery electrode (90) to be tested; The area detection component (20) acquires the area of ​​the battery electrode (90) located on the adsorption platform (11) through a non-direct contact sensor; A weight detection component (30) is disposed on the underside of the adsorption platform (11) for detecting the weight of the battery electrode (90); as well as A control module (50) is electrically connected to the area detection component (20) and the weight detection component (30) to receive area data and weight data of the battery electrode (90) and calculate the mass of the active material in the battery electrode (90).

2. The detection device according to claim 1, characterized in that, The area detection component (20) includes an ultrasonic sensor, which is disposed on the underside of the adsorption platform (11).

3. The detection device according to claim 2, characterized in that, It also includes a detection camera (80) disposed on the upper side of the adsorption platform (11) to obtain a top-view image of the battery electrode (90).

4. The detection device according to claim 3, characterized in that, The weight detection component (30) is disposed below the area detection component (20); or, the weight detection component (30) is disposed on the horizontal side of the area detection component (20).

5. The detection device according to claim 4, characterized in that, The adsorption platform (11) is also provided with a vacuum connection hole (112) that is connected to the vacuum suction hole respectively. The vacuum connection hole (112) is used to connect to the negative pressure device.

6. The detection device according to claim 5, characterized in that, The adsorption platform (11) is provided with a plurality of first vacuum suction holes (111) arranged corresponding to the battery electrode body, and a plurality of second vacuum suction holes (114) arranged corresponding to the battery electrode tabs. The adsorption platform (11) also has a first connecting cavity (113) and a second connecting cavity (115). The first connecting cavity (113) connects the plurality of first vacuum suction holes (111) and vacuum connection holes (112), and the second connecting cavity (115) connects the plurality of second vacuum suction holes (114) and the first connecting cavity (113).

7. The detection device according to any one of claims 1 to 6, characterized in that, It also includes an alignment component (40), which includes a first adjustment platform (41), a second adjustment platform (42) and a third adjustment platform (43) arranged sequentially in the vertical direction. The first adjustment platform (41) is movable relative to the second adjustment platform (42) in a first horizontal direction, and the second adjustment platform (42) is movable relative to the third adjustment platform (43) in a second horizontal direction perpendicular to the first horizontal direction.

8. The detection device according to claim 7, characterized in that, The first adjustment platform (41) is provided with a first rack (413) extending along a first horizontal direction on its lower side, and the second adjustment platform (42) is provided with a second rack (423) extending along a second horizontal direction on its lower side. The second adjustment platform (42) is provided with a first gear drive device (422) on one side along the second horizontal direction. The first gear (4222) of the first gear drive device (422) meshes with the first rack (413). The third adjustment platform (43) is provided with a second gear drive device (432) on one side along the first horizontal direction. The second gear (4322) of the second gear drive device (432) meshes with the second rack (423).

9. The detection device according to claim 8, characterized in that, It also includes a rotation adjustment mechanism (44), which is disposed on the bottom side of the third adjustment platform (43), and the rotation adjustment mechanism (44) is used to drive the third adjustment platform (43) to rotate.

10. The detection device according to claim 9, characterized in that, It also includes an electrode conveying device (400), which includes a manipulator (410) with multiple movable joints and a vacuum chuck (420) fixedly disposed at the movable end of the manipulator (410).

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