An electrode assembly and a method of manufacturing the same

Abstract

The application relates to the technical field of battery processing equipment, and discloses a battery cell laminating device which comprises a rack, a driving mechanism, a base plate, a pressing piece, a first test probe and a first transmission mechanism, the driving mechanism is installed on the rack, the base plate is connected with the rack, the pressing piece is arranged on the side of the base plate away from the rack, an electric cell placing space is formed between the pressing piece and the base plate, the pressing piece is connected with the driving mechanism, the first test probe is slidably arranged on the base plate, the first test probe is at least partially located in the electric cell placing space, the first transmission mechanism is connected between the pressing piece and the base plate, the first test probe is connected with the first transmission mechanism, the first transmission mechanism can drive the first test probe to move in the same direction with the pressing piece, and the movement distance of the first test probe is greater than that of the pressing piece. The application drives the first test probe to move through the first transmission mechanism by using the downward pressing movement of the pressing piece, and the resistance of the tab can be detected while the electric cell is pressed.

Description

Technical Field

[0001] This invention relates to the field of battery processing equipment technology, and in particular to a cell stacking device. Background Technology

[0002] In the lithium battery production process, the cell stacking (hot or cold pressing) process is a critical step. This process involves pressing and compacting the loose cells after winding to prevent them from loosening during subsequent transfers and ensuring the stability of the internal structure after the cells are packaged. To identify defective tabs in advance and prevent substandard products from entering subsequent processes, thereby reducing the risk of scrapping an entire batch of cells, tab resistance is usually tested during the cell stacking process.

[0003] Currently, in existing technologies, resistance test probes are typically mounted on the upper pressure plate of the stacking device. After the upper pressure plate presses down on the battery cell, a separate cylinder drives the resistance test probe downwards to contact the electrode tab for resistance testing. This method requires the additional installation of cylinders, air sources, etc., increasing costs and energy consumption. Summary of the Invention

[0004] The purpose of this invention is to provide a battery cell stacking device to avoid the problem of increasing costs and energy consumption by requiring the additional installation of cylinders, air sources, etc., during resistance testing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a battery cell stacking device, comprising: frame; The drive mechanism is mounted on the frame; The substrate is connected to the frame; A pressure-applying component is disposed on the side of the substrate away from the frame, and a space for placing the battery cell is formed between the pressure-applying component and the substrate; the pressure-applying component is connected to the driving mechanism, and the driving mechanism is used to drive the pressure-applying component closer to or away from the substrate; A first test probe is slidably disposed on the substrate, and the first test probe is at least partially located within the cell placement space; A first transmission mechanism connects the pressure-applying component to the substrate; and the first test probe is connected to the first transmission mechanism; The first transmission mechanism is configured to drive the first test probe to move in the same direction as the pressure-applying component, and to make the movement distance of the first test probe greater than the movement distance of the pressure-applying component.

[0006] In some embodiments, the first transmission mechanism includes a gear carrier, a transmission gear, a first rack, and a second rack. The gear carrier is connected to the pressure-applying member, the transmission gear is rotatably mounted on the gear carrier, the first rack and the second rack are respectively meshed on both sides of the transmission gear, the test probe is connected to the first rack, and the second rack is connected to the substrate.

[0007] In some embodiments, the first transmission mechanism further includes a connecting frame, a first slider, and a first slide rail. The first slide rail is connected to the substrate and located on one side of the second rack. The first slider is slidably mounted on the first slide rail. The connecting frame connects the first slider and the first rack. The test probe is connected to the connecting frame.

[0008] In some embodiments, the first transmission mechanism is provided in multiple ways, and the multiple first transmission mechanisms are respectively provided on opposite sides of the substrate, and each of the multiple first transmission mechanisms is connected to the first test probe.

[0009] In some embodiments, the cell stacking device has a first direction; along the first direction, both ends of the substrate protrude from the pressure-applying member.

[0010] In some embodiments, the pressure-applying member includes a pressure plate and a separator, the separator being located between the pressure plate and the substrate, and the separator being spaced apart from the pressure plate and the substrate, respectively. Cell placement spaces are formed between the pressure plate and the separator, and between the separator and the substrate. The driving mechanism is connected to the pressure plate and the separator respectively to drive the pressure plate and the separator to move. The first transmission mechanism connects the separator to the substrate. The cell stacking device further includes a second transmission mechanism and a second test probe. The second transmission mechanism connects the pressure plate and the separator. The second test probe is slidably disposed on the separator and connected to the second transmission mechanism. The second transmission mechanism is configured to drive the second test probe to move with the pressure plate, and to make the movement distance of the second test probe greater than the movement distance of the pressure plate.

[0011] In some embodiments, the separator includes a support frame and a carrier film, the carrier film being disposed within the support frame, the support frame being connected to the drive mechanism, the cell placement space being formed between the carrier film and the pressure plate, or between the carrier film and the substrate; the first transmission mechanism is connected to the support frame.

[0012] In some embodiments, a plurality of separators are provided, and the plurality of separators are spaced apart between the pressure plate and the substrate. The cell placement space is formed between the pressure plate and the adjacent separator, between the separator and the adjacent substrate, and between two adjacent separators. The cell stacking device further includes a third transmission mechanism and a third test probe. The third transmission mechanism connects two adjacent separators. The third test probe is slidably disposed on the separator and connected to the third transmission mechanism. The third transmission mechanism is configured to drive the third test probe to move with the separator, and to make the movement distance of the third test probe greater than the movement distance of the separator.

[0013] In some embodiments, the driving mechanism includes a first driving member and a second driving member, the first driving member and the second driving member being respectively connected to the frame, the first driving member being connected to the pressure plate, and the second driving member being connected to the separator.

[0014] In some embodiments, the cell stacking device further includes a second slider and a second slide rail, the second slide rail being mounted on the frame, the second slider being slidably mounted on the second slide rail, and the separator being connected to the second slider.

[0015] Compared with the prior art, the beneficial effects of the battery cell stacking device of this invention are as follows: The battery cell stacking device of this invention has a pressure-applying member and a substrate spaced apart to form a battery cell placement space. A first transmission mechanism is connected between the pressure-applying member and the substrate, and a first test probe is connected to the first transmission mechanism, with the first test probe at least partially located within the battery cell placement space. During battery cell stacking, a driving mechanism drives the pressure-applying member closer to the substrate. As the pressure-applying member moves, the first transmission mechanism drives the first test probe to move in the same direction as the pressure-applying member, allowing the first test probe to contact the battery cell's tabs when the pressure-applying member presses against the battery cell. The resistance of the tabs is then detected by the first test probe, thus enabling simultaneous detection of the tab resistance while pressing the battery cell. Furthermore, this application utilizes the downward pressing action of the pressure-applying member as the driving force, and the first transmission mechanism drives the first test probe to move, eliminating the need for an additional power source for the first test probe and saving energy costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cell stacking device described in an embodiment of the present invention; Figure 2 This is a schematic diagram of the first transmission mechanism in an embodiment of the present invention from one perspective; Figure 3 This is a schematic diagram of the first transmission mechanism in an embodiment of the present invention from another perspective; Figure 4 This is a schematic diagram of the separator in an embodiment of the present invention; Figure 5 This is a schematic diagram of the cell stacking device without the frame in an embodiment of the present invention; Figure 6 This is a partial view of the cell stacking device in an embodiment of the present invention, excluding the frame and the first driving component; Figure 7 This is a schematic diagram of the battery cell stacking device according to an embodiment of the present invention without any battery cells placed on it; Figure 8 This is a partial view of the battery cell stacking device according to an embodiment of the present invention, showing the battery cells before they are pressed down; Figure 9 This is a partial view of the pressure plate of the cell stacking device according to an embodiment of the present invention being pressed down; Figure 10 This is a view of the third test probe contacting the battery cell tab in an embodiment of the present invention; Figure 11 This is a view of the third and second test probes in contact with the battery cell tabs in an embodiment of the present invention; Figure 12 This is a view in an embodiment of the present invention where the first test probe, the second test probe, and the third test probe are all in contact with the battery cell tabs; Figure 13 yes Figure 12 A schematic diagram of the hidden pressure plate.

[0017] Numbering on the map: 10. Frame; 11. Second slide rail; 12. Second slider; 20. Drive mechanism; 21. First drive component; 22. Second drive component; 30. Base plate; 40. Pressure component; 401. Cell placement space; 41. Pressure plate; 411. Guide post; 42. Separator; 421. Support frame; 4211. First support arm; 4212. Second support arm; 4213. Bending part; 4214. Connecting rod; 422. Bearing membrane; 50. First transmission mechanism. Structure, 501, gear frame, 502, transmission gear, 503, first rack, 504, second rack, 505, connecting frame, 506, first slider, 507, first slide rail, 51, first test probe, 60, second transmission mechanism, 61, second test probe, 70, third transmission mechanism, 71, third test probe, 80, battery cell, 801, first electrode, 802, second electrode, X, first direction, Y, second direction, Z, third direction. Detailed Implementation

[0018] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0021] See Figure 1 As shown, this embodiment of the invention provides a battery cell stacking device, including a frame 10, a drive mechanism 20, a substrate 30, a pressure-applying member 40, a first transmission mechanism 50, and a first test probe 51. The frame 10 serves as a support frame for each component, and the drive mechanism 20 is mounted on the frame 10. The substrate 30 is connected to the frame 10. The pressure-applying member 40 is disposed on the side of the substrate 30 away from the frame 10, and a battery cell placement space 401 is formed between the pressure-applying member 40 and the substrate 30. The battery cell placement space 401 is used to place a battery cell 80, which includes a first tab 801 and a second tab 802. One of the first tab 801 and the second tab 802 is a positive tab, and the other is a negative tab. The pressure-applying member 40 is connected to the drive mechanism 20, which drives the pressure-applying member 40 to move closer to or away from the substrate 30. When the pressure-applying member 40 moves closer to the substrate 30, it can press the battery cell 80 in the battery cell placement space 401.

[0022] The first test probe 51 is slidably disposed on the substrate 30. The first test probe 51 is at least partially located in the cell placement space 401. The first test probe 51 is used to detect the resistance of the tabs of the cell 80 placed in the cell placement space 401. The first transmission mechanism 50 connects the pressure application member 40 and the substrate 30. The first test probe 51 is connected to the first transmission mechanism 50.

[0023] The first transmission mechanism 50 is configured to drive the first test probe 51 to move in the same direction as the pressure member 40, and to make the movement distance of the first test probe 51 greater than the movement distance of the pressure member 40, so that when the pressure member 40 presses against the battery cell 80, the first test probe 51 contacts the first tab 801 or the second tab 802 of the battery cell 80.

[0024] A first transmission mechanism 50 is connected between the pressure-applying member 40 and the substrate 30. A first test probe 51 is connected via the first transmission mechanism 50. When the battery cell 80 is stacked, the pressure-applying member 40 is driven closer to the substrate 30 by the drive mechanism 20. As the pressure-applying member 40 moves, the first test probe 51 moves in the same direction as the pressure-applying member 40 via the first transmission mechanism 50. This allows the first test probe 51 to contact the first tab 801 or the second tab 802 of the battery cell 80 when the pressure-applying member 40 presses against it. The resistance of the tabs is then detected by the first test probe 51, thus enabling simultaneous detection of the tab resistance while pressing the battery cell 80. Furthermore, this application utilizes the downward pressing action of the pressure-applying member 40 as the driving force, which drives the first test probe 51 through the transmission mechanism 50. This eliminates the need for an additional power source for the first test probe 51, saving energy costs.

[0025] The cell stacking device has three perpendicular directions: a first direction X, a second direction Y, and a third direction Z. The first direction X refers to the length direction of the frame 10, the second direction Y refers to the width direction of the frame 10, and the third direction Z refers to the height direction of the frame 10. The substrate 30 and the pressure applying member 40 are spaced apart along the third direction Z. The drive mechanism 20 drives the pressure applying member 40 to move along the third direction Z. The first test probe 51 is slidably disposed on the substrate 30 along the third direction Z.

[0026] See Figure 2 and Figure 3 As shown, the first transmission mechanism 50 includes a gear carrier 501, a transmission gear 502, a first rack 503, and a second rack 504. The gear carrier 501 is connected to the pressure-applying member 40. The transmission gear 502 is rotatably mounted on the gear carrier 501. The first rack 503 and the second rack 504 are respectively meshed on both sides of the transmission gear 502. The first test probe 51 is connected to the first rack 503, and the second rack 504 is connected to the substrate 30. When the pressure-applying member 40 moves, the gear carrier 501 moves with the pressure-applying member 40. Since the second rack 504 is connected to the substrate 30 and is fixed, the transmission gear 502 rotates along the second rack 504. When the transmission gear 502 rotates, it drives the first rack 503 to move, which in turn drives the first test probe 51 to move, making the running distance of the first test probe 51 greater than the moving distance of the pressure-applying member 40.

[0027] Through the cooperation of the first rack 503, the second rack 504 and the transmission gear 502, not only can the movement of the pressure-applying member 40 be used as the power source to drive the first test probe 51 to move in the same direction, saving the power equipment of the first test probe 51, but also the movement distance between the first test probe 51 and the pressure-applying member 40 can have a difference to compensate for the height difference between the large surface of the battery cell 80 and the electrode tab, so that when the pressure-applying member 40 presses against the battery cell 80, the first test probe 51 contacts the electrode tab without the need for other driving components.

[0028] See Figure 2 and Figure 3 As shown, the first transmission mechanism 50 further includes a connecting frame 505, a first slider 506, and a first slide rail 507. The first slide rail 507 is connected to the base plate 30 and is located on one side of the second rack 504. The first slider 506 is slidably mounted on the first slide rail 507. The connecting frame 505 connects the first slider 506 and the first rack 503. The first test probe 51 is connected to the connecting frame 505. The first slider 506 cooperates with the first slide rail 507 to provide guidance for the movement of the first test probe 51. Moreover, the connecting frame 505 connects the first slider 506, the first test probe 51, and the first rack 503, increasing the connection area of ​​the first test probe 51 and making the first test probe 51 more stable.

[0029] See Figure 1 , Figure 5 and Figure 6 As shown, in some embodiments, multiple first transmission mechanisms 50 are provided, and the multiple first transmission mechanisms 50 are respectively disposed on opposite sides of the substrate 30 along the first direction X. Each of the multiple first transmission mechanisms 50 is connected to a first test probe 51, which facilitates the simultaneous detection of the first tab 801 and the second tab 802 of the battery cell 80, and is also convenient for adaptation to battery cells 80 of different specifications. The multiple first transmission mechanisms 50 are grouped in pairs, and the first transmission mechanisms 50 in the same group are symmetrically arranged on both sides of the substrate 30 along the first direction X. The two first test probes 51 connected to the two first transmission mechanisms 50 in the same group are respectively used to detect the first tab 801 and the second tab 802 of the same battery cell 80. Along the second direction Y, the tabs of battery cells 80 with different height dimensions are located at different positions on the substrate 30, so the resistance can be detected by using the first test probes 51 connected to the first transmission mechanism 50 at different positions according to the position of the tabs.

[0030] In some embodiments, the two ends of the substrate 30 protrude from the pressure-applying member 40. Specifically, the two ends of the substrate 30 protrude from the pressure-applying member 40 along the first direction X and the two ends of the substrate 30 along the second direction Y, making the substrate 30 larger than the pressure-applying member 40. The pressure applied by the pressure-applying member 40 to the cell 80 is more concentrated, while the force on the substrate 30 is more dispersed, thus preventing the substrate 30 from deforming.

[0031] See Figure 1 , Figure 5 and Figure 6 As shown, in some embodiments, the pressure-applying member 40 includes a pressure plate 41 and a separator 42. The separator 42 is located between the pressure plate 41 and the substrate 30, and the separator 42 is spaced apart from the pressure plate 41 to form a cell placement space 401. The separator 42 is also spaced apart from the substrate 30 to form a cell placement space 401, so that multiple cell placement spaces 401 are formed between the pressure plate 41 and the substrate 30, which can accommodate multiple cells 80. The driving mechanism 20 is connected to the pressure plate 41 and the separator 42 respectively to drive the pressure plate 41 and the separator 42 to move. When the pressure plate 41 moves closer to the substrate 30, the separator 42 moves closer to the substrate 30, and when the separator 42 contacts the cell 80 on the substrate 30, the pressure plate 41 contacts the cell 80 on the separator 42. Pressure is applied to each cell 80 by the pressure plate 41 to achieve the stacking of multiple cells 80.

[0032] The first transmission mechanism 50 connects the separator 42 and the substrate 30, and the first test probe 51 connected to the first transmission mechanism 50 performs resistance detection on the tabs of the battery cell 80 on the substrate 30. Specifically, the gear carrier 501 of the first transmission mechanism 50 is connected to the separator 42, and the second rack 504 is connected to the substrate 30.

[0033] See Figure 1 , Figure 5 and Figure 6 As shown, the cell stacking device further includes a second transmission mechanism 60 and a second test probe 61. The second transmission mechanism 60 connects the pressure plate 41 and the separator 42. The second test probe 61 is slidably disposed on the separator 42 and connected to the second transmission mechanism 60. The second transmission mechanism 60 is configured to drive the second test probe 61 to move with the pressure plate 41, and the movement distance of the second test probe 61 is greater than the movement distance of the pressure plate 41. When the pressure plate 41 presses the cell 80, the resistance of the tabs of the cell 80 on the separator 42 is detected by the second test probe 61. Thus, the cell stacking device can stack multiple cells 80 while simultaneously detecting the resistance of the tabs of each cell 80 by the first test probe 51 and the second test probe 61. Moreover, the movement of the pressure plate 41 drives the first test probe 51 to move along the third direction Z; the movement of the separator 42 drives the second test probe 61 to move along the third direction Z. This eliminates the need for additional cylinders, motors, etc., as power sources for the test probes, saving power and simplifying the device structure.

[0034] When pressing the battery cell 80, the pressure plate 41 first moves towards the substrate 30 along the third direction Z. The second transmission mechanism 60 drives the second test probe 61 to move towards the substrate 30, and when the pressure plate 41 contacts the battery cell 80 on the separator 42, the second test probe 61 contacts the tab of the battery cell 80. Then, the pressure plate 41 and the separator 42 are driven to move towards the substrate 30 at the same speed. At this time, the pressure plate 41, the separator 42, and the second transmission mechanism 60 between the pressure plate 41 and the separator 42 all move at the same speed. The pressure plate 41 remains in contact with the battery cell 80, and the second test probe 61 remains in contact with the tab. When the separator 42 moves, it drives the first test probe 51 to move, thereby contacting the battery cell and tab on the substrate 30, thus pressing the two battery cells 80 while simultaneously detecting the tab resistance.

[0035] It should be noted that the structure and working principle of the second transmission mechanism 60 are basically the same as those of the first transmission mechanism 50. The second transmission mechanism 60 includes a gear carrier 501, a transmission gear 502, a first rack 503, and a second rack 504. Specifically, the gear carrier 501 of the second transmission mechanism 60 is connected to the pressure plate 41, and the second rack 504 of the second transmission mechanism 60 is connected to the separator 42; the second test probe 61 is connected to the first rack 503 of the second transmission mechanism 60. When the pressure plate 41 moves, the second test probe 61 is driven to move through the transmission between the first rack 503, the second rack 504, and the transmission gear 502 in the second transmission mechanism 60. When the separator 42 moves, the first test probe 51 is driven to move through the transmission between the first rack 503, the second rack 504, and the transmission gear 502 in the first transmission mechanism 50.

[0036] It should be noted that multiple second transmission mechanisms 60 can be provided. Multiple second transmission mechanisms 60 are respectively provided on opposite sides of the separator 42 along the first direction X. Multiple second transmission mechanisms 60 are all connected to second test probes 61, which facilitates simultaneous testing of the first tab 801 and the second tab 802 of the battery cell 80. Moreover, it is convenient to adapt to battery cells 80 of different specifications.

[0037] See Figure 1 As shown, in order to make the pressure plate 41 slide along the third direction Z, the frame 10 is provided with a guide hole. The battery cell stacking device also includes a guide post 411, which is inserted into the guide hole and connected to the pressure plate 41. When the pressure plate 41 moves, the guide post 411 plays a guiding role.

[0038] See Figure 1 and Figure 5As shown, the cell stacking device also includes a second slider 12 and a second slide rail 11. The second slide rail 11 is mounted on the frame 10, and the second slider 12 is slidably mounted on the second slide rail 11. The separator 42 is connected to the second slider 12. Through the cooperation between the second slider 12 and the second slide rail 11, the movement of the separator 42 in the third direction Z is guided.

[0039] See Figure 4 As shown, the separator 42 includes a support frame 421 and a carrier film 422. The carrier film 422 is disposed within the support frame 421. The support frame 421 is connected to the drive mechanism 20. The cell placement space 401 is formed between the carrier film 422 and the pressure plate 41, or between the carrier film 422 and the substrate 30. The first transmission mechanism 50 is connected to the support frame 421. The support frame 421 provides a support carrier for the carrier film 422 and also provides an installation carrier for the first transmission mechanism 50. The drive mechanism 20 drives the support frame 421 to move along the third direction Z, causing the carrier film 422 and the second rack 504 on the support frame 421 to move along the third direction Z. The support frame 421 is connected to the second slider 12. By using the carrier film 422 to support the cell 80, the weight of the intermediate separator 42 is reduced, and the pressure of the separator 42 on the cell 80 is reduced, thereby improving the pressure consistency of each layer of cell 80. As an example, the carrier membrane 422 is a Mylar membrane, which is heat-resistant, thin, and tensile-resistant.

[0040] See Figure 1 and Figure 4 As shown, the support frame 421 includes a first support arm 4211 and a second support arm 4212, which are spaced apart along a first direction X. A carrier film 422 is connected between the first support arm 4211 and the second support arm 4212. Both the first support arm 4211 and the second support arm 4212 are provided with clamping grooves, and the carrier film 422 is clamped in the clamping grooves. This arrangement provides sufficient space for the installation of the carrier film 422 and ensures the installation stability of the carrier film 422.

[0041] Both the first support arm 4211 and the second support arm 4212 along the second direction Y have a bent portion 4213 at one end, and the second slider 12 is connected to the bent portion 4213. Both the first support arm 4211 and the second support arm 4212 are connected to a second driving member 22, so that both the first support arm 4211 and the second support arm 4212 have a power source for movement along the third direction Z, causing the support frame 421 to drive the carrier membrane 422 to rise and fall smoothly. Taking the arrangement of the first transmission mechanism 50 as an example, both the first support arm 4211 and the second support arm 4212 are connected to the first transmission mechanism 50. The first test probe 51 connected to the first transmission mechanism 50 on the first support arm 4211 detects the first tab 801, and the first test probe 51 connected to the first transmission mechanism 50 on the second support arm 4212 detects the second tab 802. It should be noted that when the separator 42 is connected to the second transmission mechanism 60, both the first support arm 4211 and the second support arm 4212 are connected to the second transmission mechanism 60 to detect the first tab 801 and the second tab 802 respectively. Specifically, the gear carrier 501 of the first transmission mechanism 50 is connected to the side of the first support arm 4211 facing the substrate 30 along the third direction Z or the side of the second support arm 4212 facing the substrate 30 along the third direction Z. The second rack 504 and the first slide rail 507 of the second transmission mechanism 60 are connected to the side of the first support arm 4211 away from the substrate 30 along the third direction Z, or the second rack 504 and the first slide rail 507 of the second transmission mechanism 60 are connected to the side of the second support arm 4212 away from the substrate 30 along the third direction Z.

[0042] See Figure 4 As shown, the support frame 421 also includes connecting rods 4214, which extend along the first direction X. The two ends of the connecting rods 4214 are respectively connected to the first support arm 4211 and the second support arm 4212 to improve the overall structural strength of the support frame 421. Multiple connecting rods 4214 are provided, spaced apart along the second direction Y. One end of the carrier membrane 422 along the second direction Y is flush with the first support arm 4211 and the second support arm 4212 to provide stable support for the carrier membrane 422. The other end of the carrier membrane 422 along the second direction Y is spaced apart from the connecting rods 4214.

[0043] See Figure 1 , Figure 5 and Figure 6As shown, multiple separators 42 are provided, and the multiple separators 42 are spaced apart between the pressure plate 41 and the substrate 30. Cell placement spaces 401 are formed between the pressure plate 41 and adjacent separators 42, between separators 42 and adjacent substrates 30, and between two adjacent separators 42. Thus, multiple cell placement spaces 401 are formed between the pressure plate 41 and the substrate 30, which can simultaneously place multiple cells 80 and perform pressing and tab detection on the multiple cells 80. Therefore, the number of separators 42 can be adjusted according to the number of stacked cells 80 required, thereby adjusting the number of cell placement spaces 401 formed.

[0044] See Figure 1 , Figure 5 and Figure 6 As shown, the cell stacking device further includes a third transmission mechanism 70 and a third test probe 71. The third transmission mechanism 70 connects two adjacent separators 42. The third test probe 71 is slidably disposed on the separator 42 and connected to the third transmission mechanism 70. The third transmission mechanism 70 is configured to drive the third test probe 71 to move with the separator 42, and the movement distance of the third test probe 71 is greater than the movement distance of the separator 42. By driving the third test probe 71 through the third transmission mechanism 70, the tabs of the cells 80 between the two adjacent separators 42 are tested. The pressure plate 41 presses the cells 80 in each cell placement space 401, realizing the simultaneous pressing of multiple cells 80 at the same station, improving production efficiency, without occupying much factory area and height, saving the number of cell stacking devices, saving equipment manufacturing costs, and the same device pressing multiple cells 80 results in strong consistency of the cells 80, avoiding the loss of batch cells 80 due to poor consistency caused by a large number of stacking devices. Using the downward pressure action of the upper layer as the drive, the test probes are driven by the first transmission mechanism 50, the second transmission mechanism 60 and the third transmission mechanism 70 respectively to perform electrode detection on each cell 80. There is no need to set up an additional drive for the resistance test structure, which reduces equipment cost, saves equipment placement space and saves equipment energy.

[0045] In order to simultaneously detect the resistance of the first tab 801 and the second tab 802 of the battery cell 80, multiple third transmission mechanisms 70 are provided. The multiple third transmission mechanisms 70 are located on opposite sides of the separator 42, and each third transmission mechanism 70 is connected to a third test probe 71.

[0046] It should be noted that the structure and working principle of the third transmission mechanism 70 are basically the same as those of the second transmission mechanism 60 and the first transmission mechanism 50. The third transmission mechanism 70 includes a gear carrier 501, a transmission gear 502, a first rack 503, and a second rack 504. Specifically, the gear carrier 501 of the third transmission mechanism 70 is connected to the upper partition 42, and the second rack 504 of the third transmission mechanism 70 is connected to the adjacent lower partition 42; the third test probe 71 is connected to the first rack 503 of the third transmission mechanism 70.

[0047] See Figure 1 , Figure 5 and Figure 6 As shown, the drive mechanism 20 includes a first drive member 21 and a second drive member 22. The first drive member 21 and the second drive member 22 are respectively connected to the frame 10. The first drive member 21 is connected to the pressure plate 41, and the second drive member 22 is connected to the separator 42. The first drive member 21 is a linear drive actuator such as a cylinder, electric cylinder, or hydraulic cylinder. The first drive member 21 drives the pressure plate 41 to move along the third direction Z. The second drive member 21 is also a linear drive actuator such as a cylinder, electric cylinder, or hydraulic cylinder. The second drive member 22 drives the separator 42 to move along the third direction Z. To ensure smooth movement of the separator 42, second drive members 22 are connected to both sides of the separator 42 along the first direction X. It should be noted that when multiple separators 42 are provided, each separator 42 is connected to a corresponding second drive member 22.

[0048] Taking an example where there are two partitions 42, one upper partition and one lower partition, the working process of the present invention is as follows: See Figures 7-8 As shown, the battery cell 80 is placed in the battery cell placement space 401, and multiple battery cells 80 can be placed simultaneously through multi-layer moving grippers.

[0049] See Figures 9-10 As shown, the first driving member 21 drives the pressure plate 41 to move closer to the substrate 30 along the third direction Z, which drives the transmission gear 502 in the second transmission mechanism 60 to rotate downward, and drives the first rack 503 in the second transmission mechanism 60 to move downward, thereby driving the second test probe 61 to move downward. When the pressure plate 41 contacts the upper surface of the cell 80 on the upper separator 42, the second test probe 61 contacts the corresponding first tab 801 and second tab 802.

[0050] See Figure 11As shown, the first driving member 21 drives the pressure plate 41 to continue moving towards the substrate 30 along the third direction Z, and the second driving member 22 drives the upper partition 42 to move towards the substrate 30 along the third direction Z at the same speed, and drives the third test probe 71 to move through the third transmission mechanism 70 until the upper partition 42 contacts the upper surface of the cell 80 on the lower partition 42, and the third test probe 71 contacts the first tab 801 and the second tab 802 of the cell 80 on the lower partition 42.

[0051] See Figure 12 and Figure 13 As shown, the first driving member 21 drives the pressure plate 41 to continue moving towards the substrate 30 along the third direction Z. The second driving member 22 drives the upper partition 42 and the lower partition 42 to move towards the substrate 30 along the third direction Z at the same speed. The first transmission mechanism 50 drives the first test probe 51 to move until the lower partition 42 contacts the battery cell 80 on the substrate 30, and the first test probe 51 contacts the first tab 801 and the second tab 802 of the battery cell 80 on the substrate 30. At this point, the three battery cells 80 are pressed together, bearing the same pressure, completing the stacking action. Simultaneously, the first test probe 51, the second test probe 61, and the third test probe 71 respectively perform resistance detection on the tabs of each battery cell 80, completing the resistance test action.

[0052] After the stacking action and resistance test are completed, the lower layer separator 42, the upper layer separator 42 and the pressure plate 41 return to their original positions at the same speed, and the battery cells 80 wait to be picked up and unloaded in the battery cell placement space 401.

[0053] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A battery cell stacking device, characterized in that, include: Rack (10); Drive mechanism (20) is mounted on the frame (10); The substrate (30) is connected to the frame (10); A pressure-applying member (40) is disposed on the side of the substrate (30) away from the frame (10), and a cell placement space (401) is formed between the pressure-applying member (40) and the substrate (30); the pressure-applying member (40) is connected to the driving mechanism (20), and the driving mechanism (20) is used to drive the pressure-applying member (40) closer to or further away from the substrate (30). A first test probe (51) is slidably disposed on the substrate (30), and the first test probe (51) is at least partially located within the cell placement space (401); A first transmission mechanism (50) connects the pressure-applying member (40) to the substrate (30); and the first test probe (51) is connected to the first transmission mechanism (50). The first transmission mechanism (50) is configured to drive the first test probe (51) to move in the same direction as the pressure member (40), and to make the movement distance of the first test probe (51) greater than the movement distance of the pressure member (40).

2. The cell stacking device according to claim 1, characterized in that, The first transmission mechanism (50) includes a gear carrier (501), a transmission gear (502), a first rack (503), and a second rack (504). The gear carrier (501) is connected to the pressure application member (40). The transmission gear (502) is rotatably mounted on the gear carrier (501). The first rack (503) and the second rack (504) are respectively meshed on both sides of the transmission gear (502). The first test probe (51) is connected to the first rack (503), and the second rack (504) is connected to the substrate (30).

3. The cell stacking device according to claim 2, characterized in that, The first transmission mechanism (50) further includes a connecting frame (505), a first slider (506) and a first slide rail (507). The first slide rail (507) is connected to the substrate (30) and located on one side of the second rack (504). The first slider (506) is slidably mounted on the first slide rail (507). The connecting frame (505) connects the first slider (506) and the first rack (503). The first test probe (51) is connected to the connecting frame (505).

4. The cell stacking device according to claim 1, characterized in that, The first transmission mechanism (50) is provided in multiple ways, and the multiple first transmission mechanisms (50) are respectively provided on opposite sides of the substrate (30), and each of the multiple first transmission mechanisms (50) is connected to the first test probe (51).

5. The cell stacking device according to claim 1, characterized in that, The cell stacking device has a first direction (X); along the first direction (X), the two ends of the substrate (30) protrude from the pressure member (40).

6. The cell stacking device according to claim 1, characterized in that, The pressure-applying component (40) includes a pressure plate (41) and a separator (42). The separator (42) is located between the pressure plate (41) and the substrate (30), and the separator (42) is spaced apart from the pressure plate (41) and the substrate (30). The cell placement space (401) is formed between the pressure plate (41) and the separator (42) and between the separator (42) and the substrate (30). The driving mechanism (20) is connected to the pressure plate (41) and the separator (42) respectively to drive the pressure plate (41) and the separator (42) to move. The first transmission mechanism (50) connects the separator (42) and the substrate (30). The cell stacking device further includes a second transmission mechanism (60) and a second test probe (61). The second transmission mechanism (60) connects the pressure plate (41) and the separator (42). The second test probe (61) is slidably disposed on the separator (42) and connected to the second transmission mechanism (60). The second transmission mechanism (60) is configured to drive the second test probe (61) to move with the pressure plate (41), and to make the movement distance of the second test probe (61) greater than the movement distance of the pressure plate (41).

7. The cell stacking device according to claim 6, characterized in that, The separator (42) includes a support frame (421) and a carrier film (422). The carrier film (422) is disposed inside the support frame (421). The support frame (421) is connected to the drive mechanism (20). The cell placement space (401) is formed between the carrier film (422) and the pressure plate (41), or between the carrier film (422) and the substrate (30). The first transmission mechanism (50) is connected to the support frame (421).

8. The cell stacking device according to claim 6, characterized in that, The separator (42) is provided in multiple ways, and the multiple separators (42) are spaced apart between the pressure plate (41) and the substrate (30). The cell placement space (401) is formed between the pressure plate (41) and the adjacent separator (42), between the separator (42) and the adjacent substrate (30), and between two adjacent separators (42). The cell stacking device further includes a third transmission mechanism (70) and a third test probe (71). The third transmission mechanism (70) connects two adjacent separators (42). The third test probe (71) is slidably disposed on the separator (42) and connected to the third transmission mechanism (70). The third transmission mechanism (70) is configured to drive the third test probe (71) to move with the separator (42), and to make the movement distance of the third test probe (71) greater than the movement distance of the separator (42).

9. The cell stacking device according to claim 6, characterized in that, The drive mechanism (20) includes a first drive member (21) and a second drive member (22). The first drive member (21) and the second drive member (22) are respectively connected to the frame (10). The first drive member (21) is connected to the pressure plate (41), and the second drive member (22) is connected to the separator (42).

10. The cell stacking device according to claim 6, characterized in that, The cell stacking device further includes a second slider (12) and a second slide rail (11), the second slide rail (11) is mounted on the frame (10), the second slider (12) is slidably mounted on the second slide rail (11), and the separator (42) is connected to the second slider (12).

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