Dust removal mechanism for polymer soft package cell welding hot-pressing short circuit measurement station

Abstract

The utility model discloses a dust removal mechanism for a polymer soft package battery cell welding hot-pressing short circuit measuring station, which comprises a mounting base plate, a hot-pressing plate assembly, a tab supporting plate and a negative pressure mechanism, the hot-pressing plate assembly is arranged on the upper surface of the mounting base plate, and the upper surface of the hot-pressing plate assembly is a supporting surface for placing a battery cell to be subjected to hot-pressing; the tab supporting plate is arranged on the side edge of the side where a tab of a to-be-hot-pressed battery cell placed on the corresponding supporting face of the mounting base plate and the hot pressing plate assembly is located, and the negative pressure mechanism is arranged on the side edge, opposite to the tab supporting plate, of the hot pressing plate assembly and the mounting base plate and is provided with a dust suction opening located above the supporting face. And the dust suction port is over against the tail part of the to-be-hot-pressed battery cell placed on the supporting surface. The pollution to the battery caused by dust attached to the hot pressing plate assembly and adhered to the surface of the subsequent battery cell is reduced, and the problems of potential safety hazard and poor k value of the battery cell caused by the dust are reduced. And the structure is simple, manual dust collection treatment is not needed, and practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, specifically to a dust removal mechanism for a short-circuit testing station during the welding of polymer soft-pack battery cells. Background Technology

[0002] Lithium-ion batteries have advantages such as high specific energy, high cycle life, and long storage time. Among them, lithium-ion pouch batteries are increasingly used in portable mobile devices due to their advantages such as large capacity, good safety performance, small size, and flexible size design.

[0003] Polymer soft-pack batteries are batteries that use aluminum-plastic packaging film as packaging material. They mainly include the battery cell, positive and negative electrode tabs that are electrically connected to the battery cell, and aluminum-plastic film used to encapsulate the battery cell (the aluminum-plastic film is a three-layer composite layer, from the outside to the inside, it is ON / AL / CPP (outer nylon layer / middle aluminum foil layer / inner heat-sealing layer)).

[0004] To ensure the quality of polymer pouch cells, short circuit testing is required in the subsequent winding process, specifically through hot-pressing short-circuit testing. During hot pressing, material that detaches during winding and material that breaks off under the pressure of the hot press plate falls as powder from the rear of the cell and adheres to the plate. This powdery material can adhere to the cell surface, potentially causing poor k-value (k-value). Furthermore, with increasing hot pressing cycles and time, this powdery material gradually accumulates and hardens under the pressure of the hot press plate, potentially damaging the cell surface, rendering the cell unusable, or even posing a safety hazard such as cell explosion.

[0005] In existing technologies, the removal of powder generated at the hot pressing station is usually done manually, such as by sweeping with brush rollers or dust-collecting rollers or by using external dust collection equipment such as vacuum cleaners. However, this method is labor-intensive and inefficient. Therefore, this utility model is proposed. Utility Model Content

[0006] To address at least one of the aforementioned technical problems, the purpose of this utility model is to provide a dust removal mechanism for the hot-press short-circuit testing station of polymer soft-pack battery cells. A negative pressure mechanism is set at the tail of the battery cell to be hot-pressed, which is placed on the support surface of the hot-press plate. The dust suction port of the negative pressure mechanism removes the powder falling from the tail of the battery cell during the hot-press short-circuit test, thereby reducing the amount of dust adhering to the hot-press plate and sticking to the surface of the battery cell, and reducing the safety hazards and poor k-value of the battery caused by dust.

[0007] The technical solution of this utility model is:

[0008] The purpose of this utility model is to provide a dust removal mechanism for a hot-pressing short-circuit testing station for polymer soft-pack battery cells, including a mounting base, a hot-pressing plate assembly, an electrode tab support plate, and a negative pressure mechanism. The hot-pressing plate assembly is disposed on the upper surface of the mounting base, and the upper surface of the hot-pressing plate assembly serves as a support surface for placing the battery cell to be hot-pressed. The electrode tab support plate is disposed on the side of the mounting base and the hot-pressing plate assembly corresponding to the support surface on which the electrode tab of the battery cell to be hot-pressed is located. The negative pressure mechanism is disposed on the side of the hot-pressing plate assembly and the mounting base opposite to the electrode tab support plate, and the negative pressure mechanism has a dust suction port located above the support surface, with the dust suction port facing the tail of the battery cell to be hot-pressed placed on the support surface.

[0009] Preferably, the negative pressure mechanism has two first sides that are vertically opposite and parallel to each other, two second sides that are front-to-back opposite and parallel to each other, and two third sides that are horizontally opposite and parallel to each other.

[0010] The width direction of the upper first side extends out of the width direction of the lower first side to form a first extension surface.

[0011] The upper end of the second side at the front end is bent forward to form a second extended surface, and the second extended surface and the first extended surface are arranged opposite each other and spaced apart.

[0012] The upper part of the front side of the two third side surfaces bends forward, the upper side surface protrudes forward and extends forward, and the two are connected by a vertical side to form a third extended surface respectively. An air inlet is opened on one of the third side surfaces, and the air inlet is connected to an air inlet pipe.

[0013] The first extension surface, the second extension surface, and the two third extension surfaces together enclose and define a suction channel, and the outer end face of the suction channel has an opening and is implemented as the dust suction port.

[0014] Preferably, a first connecting plate is fixed on another third side surface, and the first connecting plate has at least one first connecting hole, which avoids the third side surface and the third extended surface and corresponds to the space defined by the second side surface and the second extended surface at the front end;

[0015] At least one second connection hole is provided on the side of the mounting base plate that is on the same side as the first connecting plate;

[0016] The negative pressure mechanism is fixedly connected to the mounting base plate via a second connecting plate. The second connecting plate is an L-shaped plate. The negative pressure mechanism is suspended above the mounting base plate and on the side of the hot press plate assembly via the L-shaped second connecting hole. The second connecting plate is provided with a third connecting hole and a fourth connecting hole corresponding to the first connecting hole and the second connecting hole, respectively.

[0017] Preferably, the third connecting hole is an elongated hole extending horizontally, and the fourth connecting hole is an elongated hole extending vertically.

[0018] Preferably, the length of the suction port is not less than the width of the support surface on the hot press plate assembly.

[0019] Preferably, a guide rail connecting plate is also fixedly connected to the bottom of the mounting base plate. The guide rail connecting plate is slidably connected to the guide rail via a slider to switch back and forth between the testing station and the material handling station.

[0020] Preferably, the mounting base plate has a plurality of fifth connecting holes extending through its thickness direction, and the guide rail connecting plate has a sixth connecting hole corresponding to each of the plurality of fifth connecting holes.

[0021] Preferably, the electrode support plate has at least one seventh connection hole, and the guide rail connection plate has a corresponding eighth connection hole.

[0022] Preferably, the seventh connecting hole is an elongated hole extending vertically.

[0023] Preferably, the electrode holder plate includes a vertically extending plate body and a support block integrally formed in a horizontal direction at the upper end of the plate body, wherein the upper surface of the support block is configured as a support surface for supporting the electrode, and the support surface is not lower than the support surface; and / or

[0024] The hot press plate assembly includes a heating plate and a heat insulation plate stacked from top to bottom.

[0025] Compared with the prior art, the advantages of this utility model are:

[0026] This utility model discloses a dust removal mechanism for the hot-pressing and short-circuit testing station of polymer soft-pack battery cells. The dust suction port of the negative pressure mechanism is directly facing the tail of the battery cell to be hot-pressed, removing the powder generated from the tail of the cell during hot pressing. This reduces dust adhesion to the hot-pressing plate assembly and subsequent cell surfaces, preventing battery contamination and minimizing safety hazards and poor k-values ​​caused by dust. The structure is simple, requires no manual dust collection, saving manpower; dust collection is performed simultaneously with hot pressing, making it highly practical. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0028] Figure 1 This is a schematic diagram of the dust removal mechanism for the hot-press short-circuit testing station of the polymer soft-pack battery according to an embodiment of the present invention.

[0029] Figure 2 for Figure 1 The dust removal mechanism shown in the diagram only includes the mounting base plate, the negative pressure mechanism, and the second connecting plate.

[0030] Figure 3 for Figure 1 A schematic diagram of the negative pressure mechanism of the dust removal system in the image;

[0031] Figure 4 This is a schematic diagram of the structure of the second connecting plate of the dust removal mechanism for the hot-press short-circuit testing station of the polymer soft-pack battery according to an embodiment of the present invention.

[0032] Figure 5 This is a schematic diagram of the mounting base of the dust removal mechanism for the hot-press short-circuit testing station of a polymer soft-pack battery according to an embodiment of the present invention.

[0033] Figure 6 This is a schematic diagram of the electrode tab support plate of the dust removal mechanism for the hot-press short-circuit testing station of a polymer soft-pack battery according to an embodiment of the present invention.

[0034] Figure 7 This is a schematic diagram of the guide rail connecting plate of the dust removal mechanism for the hot-press short-circuit testing station of a polymer soft-pack battery according to an embodiment of the present invention.

[0035] The components are as follows: 10. Mounting substrate; 11. Second connecting hole; 12. Fifth connecting hole; 20. Hot press plate assembly; 21. Heating plate; 22. Heat insulation plate; 30. Negative pressure mechanism; 31. Air inlet pipe; 300. Dust suction port; 310. First side surface; 311. First extension surface; 320. Second side surface; 321. Second extension surface; 330. Third side surface; 331. Third extension surface; 40. Electrode support plate; 41. Plate body; 410. Seventh connecting hole; 42. Support block; 50. Guide rail connecting plate; 51. Sixth connecting hole; 52. Eighth connecting hole; 60. First connecting plate; 61. First connecting hole; 70. Second connecting plate; 71. Third connecting hole; 72. Fourth connecting hole; 80. Battery cell. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0037] See Figures 1 to 7 The dust removal mechanism for the hot-press short-circuit testing station of polymer soft-pack batteries according to this utility model includes a mounting base plate 10, a hot-press plate assembly 20, an electrode tab support plate 40, and a negative pressure mechanism 30.

[0038] The hot press plate assembly 20 is a conventional hot press plate structure used for short-circuit testing during welding of polymer soft-pack batteries. No specific description or limitation is given; examples are provided. Figure 1 As shown, from top to bottom, the assembly includes a heating plate 21 and a heat insulation plate 22 stacked together. The heating plate 21 and heat insulation plate 22 are square plates of the same size. The heating plate 21 contains heating elements such as heating tubes and thermocouples. The upper surface of the hot-pressing plate assembly 20, specifically the upper surface of the heating plate 21, serves as a support surface for placing the battery cell 80 to be hot-pressed. The mounting substrate 10 is a square plate larger than the heating plate 21 and heat insulation plate 22. The hot-pressing plate assembly 20 is positioned in the middle of the upper surface of the mounting substrate 10, i.e., the two are stacked together. A tab support plate 40 is located on the side of the stacked hot-pressing plate assembly 20 and the mounting substrate 10, more specifically on the side corresponding to the tab of the battery cell 80 to be hot-pressed, i.e., the front end side of the battery cell 80 (exemplary example: ...). Figure 1 (As shown on the right side), used to support the positive and negative tabs of the battery cell 80 to be heated. The negative pressure mechanism 30 is disposed opposite to the support plate, that is, the negative pressure mechanism 30 is disposed on the side of the mounting base plate 10 and the heating plate 21 assembly opposite to the support plate (exemplary example as shown on the right side). Figure 1As shown on the left), the negative pressure mechanism 30 is positioned at the tail of the battery cell 80 to be heated on the support surface of the heating plate 21 assembly. The negative pressure mechanism 30 can generate negative pressure adsorption force and has a suction port 300. The suction port 300 is located above the upper surface of the heating plate assembly 20, that is, the position of the suction port 300 is higher than the heating plate assembly 20. Since the battery cell 80 to be heated has a certain thickness, the suction port 300 is set higher than the upper surface of the heating plate 21 assembly. More specifically, the suction port 300 is directly opposite the tail of the battery cell 80 to be heated on the support surface of the heating plate 21 assembly. This design allows for the activation of the negative pressure mechanism 30 during the hot-pressing short-circuit test of the cell 80. The suction port 300 of the negative pressure mechanism 30 is positioned directly over the tail of the cell 80 to remove powder generated during hot pressing. This reduces dust adhesion to the hot-pressing plate assembly 20 and subsequent cell 80 surfaces, minimizing battery contamination and reducing safety hazards and poor k-value caused by dust. The design is simple, requires no manual dust collection, saves manpower, and simply requires activating the negative pressure mechanism 30 for dust collection during hot pressing, making it highly practical.

[0039] like Figure 2 and Figure 3 As shown, the negative pressure mechanism 30 in this embodiment is an inverted L-shaped shell structure with a hollow interior forming an air cavity. Specifically, it has two first side surfaces 310 arranged vertically opposite and parallel to each other, two second side surfaces 320 arranged front-to-back opposite and parallel to each other, and two third side surfaces 330 arranged left-to-right opposite and parallel to each other. It should be noted that the front-to-back and left-to-right are relative to the battery cell 80, specifically the side of the negative pressure mechanism 30 facing the tail of the battery cell 80 is considered the front. Figure 3The second side 320 at the front center (i.e., the second side 320 facing the reader), and so on, defines the directions of the other sides. The two first sides 310, two second sides 320, and two third sides 330 together form a cuboid structure with an internal air cavity. In this embodiment, the width of the upper first side 310 is wider than the width of the lower first side 310; more specifically, the front edge of the upper first side 310 protrudes beyond the front edge of the lower first side 310. For ease of description and distinction, the protruding portion of the upper first side 310 is described as a first extension surface 311. The upper portion of the second side 320 at the front center bends forward to form a second extension surface 321, wherein the second extension surface 321 and the first extension surface 311 are vertically opposite and parallel to each other. The two third side surfaces 330 have identical structures. Specifically, the upper front portion of any third side surface 330 bends forward and extends forward, and the two extended portions are connected by a vertical edge to form a third extension surface 331. The two third extension surfaces 331 are arranged opposite each other and parallel to each other. The first extension surface 311, the second extension surface 321, and the two third extension surfaces 331 together enclose and define a suction channel with openings on both the front and rear ends. The opening on the front end of the suction channel is implemented as a dust inlet 300, and the opening on the rear end is connected to the air cavity. In order to achieve negative pressure suction in the negative pressure mechanism 30, the air cavity of the negative pressure mechanism 30 is connected to a negative pressure generating device, such as a negative pressure pump, through an air inlet pipe 31. For this purpose, an air inlet (not shown) is opened on one of the third side surfaces 330, and the air inlet pipe 31 is sealed and fixed at the air inlet. The air inlet pipe 31 is exemplarily an arc-shaped circular pipe. Furthermore, a square first connecting plate 60 is provided on another third side surface 330, and the first connecting hole 61 is preferably welded and fixed to the third side surface 330. In order to prevent the fasteners (not shown, but referred to as the first fasteners here for ease of description and distinction) connected to the first connecting plate 60 from damaging the integrity of the air cavity, the first connecting plate 60 is partially connected to the third side surface 330, partially connected to the third extension surface 331, and partially exposed outside the third side surface 330 to form a connecting surface. That is, the connecting surface corresponds to an inverted L-shaped space defined between the second extension surface 321 and the front end of the second side surface 320, and at least one ( Figure 3 The first connecting hole 61 (exemplarily two, spaced vertically) is positioned to avoid the inverted L-shaped space between the third side surface 330 and the third extension surface 331, corresponding to the second extension surface 321 and the front second side surface 320. Therefore, the opening of the first connecting hole 61 does not compromise the integrity of the negative pressure mechanism 30.

[0040] To achieve the installation and fixation of the negative pressure mechanism 30, a second connecting plate 70 extending upward is provided on the side of the mounting base 10 on the same side as the first connecting plate 60. Correspondingly, a second connecting hole 11 is opened on the side of the mounting base 10 for the second connecting plate 70 to connect to. The negative pressure mechanism 30 is fixedly connected to the mounting base 10 by fixing the second connecting plate 70 to the first connecting plate 60. Preferably, in this embodiment, as... Figure 2 As shown, the negative pressure mechanism 30 is suspended above the mounting base plate 10 and on the side of the hot press plate assembly 20. Specifically, as... Figure 4 As shown, the second connecting plate 70 is an L-shaped plate. The second connecting plate 70 has a third connecting hole 71 and a fourth connecting hole 72 corresponding to the first connecting hole 61 and the second connecting hole 11. Specifically, the third connecting hole 71 is located on the vertical portion of the second connecting plate 70, and the fourth connecting hole 72 is located on the horizontal portion of the second connecting plate 70. Preferably, to facilitate adjusting the height of the negative pressure mechanism 30 so that the suction port 300 is directly opposite the tail of the battery cell 80 on the support surface, and also to facilitate adjusting the distance between the suction port 300 of the negative pressure mechanism 30 and the tail of the battery cell 80 to be heated, in this embodiment, both the third connecting hole 71 and the fourth connecting hole 72 are elongated holes. More specifically, the third connecting hole 71 is an elongated hole extending horizontally, and the fourth connecting hole 72 is an elongated hole extending vertically. For both the third connecting hole 71 and the fourth connecting hole 72, it is preferred that... Figure 4 The two shown are connected more reliably and securely.

[0041] In this embodiment, the length of the suction port 300 is not less than (e.g., Figure 1 The width of the support surface on the hot press plate assembly 20 is preferably greater than the width of the battery cell 80 to be hot-pressed. This allows the suction port 300 to effectively vacuum the upper surface of the hot press plate and the entire tail of the battery cell 80, resulting in a better suction effect.

[0042] like Figure 1 and Figure 7As shown, to facilitate the switching of the dust removal mechanism between the testing station and the material handling station, a guide rail connecting plate 50 is provided on the bottom surface of the mounting base plate 10. The guide rail connecting plate 50 is slidably connected to the guide rail (not shown) via a slider (not shown) on its bottom surface. In this embodiment, the size of the guide rail connecting plate 50 is larger than the size of the mounting base plate 10. The size of the mounting base plate 10 is larger than the size of the hot press plate assembly 20 (specifically, the length of the mounting base plate 10 is greater than the length of the hot press plate assembly 20 and the width of both is the same). The extra part is used for fasteners (not shown; similarly, for ease of description and distinction, the fasteners are described here as second fasteners) to connect and fix the mounting base plate 10 and the guide rail connecting plate 50. Therefore, a plurality of fifth connecting holes 12 penetrating its thickness are provided on the mounting base plate 10, specifically as follows: Figure 5 As shown, a fifth connecting hole 12 is provided at each of the four corners of the mounting base plate 10, corresponding to, as Figure 7 As shown, the guide rail connecting plate 50 has sixth connecting holes 51 corresponding to a plurality of fifth connecting holes 12. It should be noted that the connection between the hot press plate assembly 20 and the mounting base plate 10 can be welded or fixed by fasteners (for this purpose, corresponding connecting holes (not shown) are provided on the mounting base plate 10 and specifically on the heat insulation plate 22 of the hot press plate assembly 20). In this embodiment, the length of the guide rail connecting plate 50 is greater than the width of the mounting base plate 10, and the width of the guide rail connecting plate 50 is the same as the length of the mounting base plate 10. The mounting base plate 10 is fixed to one side of the guide rail connecting plate along its length. Figure 1 (Example: right side) The negative pressure mechanism 30 is suspended above the left side of the guide rail connecting plate 50 and connected to the mounting base plate 10 through the second connecting plate 70.

[0043] For the tab plate 40, such as Figure 6 As shown, it is in an inverted L-shape, that is, the electrode support plate 40 includes a vertically extending plate body 41 and a support block 42 integrally formed on the upper end of the plate body 41 in the horizontal direction. The width of the support block 42 is greater than the length of the positive electrode (not shown) or negative electrode (not shown), and the length of the support block 42 is not less than the distance between the opposite sides of the positive electrode and the negative electrode. The upper surface of the support block 42 is implemented as a support surface for supporting the electrode, and the support surface is higher than the support surface of the upper surface of the heating plate 21 of the hot press plate assembly 20.

[0044] like Figure 6 As shown, in this embodiment, the electrode holder plate 40 is connected and fixed to the guide rail connecting plate 50 by fasteners (not shown; similarly, for ease of description and distinction, the fasteners are described here as third fasteners). For this purpose, at least one ( Figure 7(Example: two) Eighth connecting holes 52. Correspondingly, the electrode holder plate 40, more specifically the plate body 41, has a corresponding seventh connecting hole 410 ( Figure 6 (Two examples are provided). It should be noted that, in order to prevent the positive and negative tabs of the battery cell 80 to be heated from being bent or even broken during hot pressing, thus affecting its performance, the upper surface of the tab support plate 40 in this embodiment is not lower than (preferably higher than) the upper surface of the hot pressing plate assembly 20, specifically the heating plate 21, i.e., the support surface. Preferably, in order to facilitate the adjustment of the height of the tab support plate 40 for the positive and negative tabs of the battery cell 80 to be heated, the seventh connecting hole 410 opened on the tab support plate 40 in this embodiment is an elongated hole extending vertically.

[0045] In this embodiment, the dust removal mechanism is used by placing the battery cell 80 to be hot-pressed on the support surface of the upper surface of the heating plate 21, so that the tail of the battery cell 80 is directly facing the dust suction port 300 of the negative pressure mechanism 30 and the tabs (positive tab and negative tab) of the battery cell 80 are supported on the tab support plate 40. When hot pressing begins, the negative pressure mechanism 30 is turned on, so that the dust suction port 300 generates negative pressure suction on the tail of the battery cell 80, which removes the dust generated by hot pressing, reduces the amount of dust adhering to the hot pressing plate assembly 20 and sticking to the surface of the subsequent battery cell 80, which would cause pollution to the battery and reduce the safety hazards and poor k-value of the battery cell 80 caused by dust.

[0046] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A dust removal mechanism for a short-circuit testing station during the welding of polymer soft-pack battery cells, characterized in that, The device includes a mounting substrate, a hot-pressing plate assembly, an electrode holder, and a negative pressure mechanism. The hot-pressing plate assembly is disposed on the upper surface of the mounting substrate, and the upper surface of the hot-pressing plate assembly serves as a support surface for placing the battery cell to be hot-pressed. The electrode holder is disposed on the side of the mounting substrate and the mounting substrate corresponding to the support surface on which the electrode of the battery cell to be hot-pressed is located. The negative pressure mechanism is disposed on the side of the hot-pressing plate assembly and the mounting substrate opposite to the electrode holder, and the negative pressure mechanism has a dust suction port located above the support surface, with the dust suction port facing the tail of the battery cell to be hot-pressed placed on the support surface.

2. The dust removal mechanism according to claim 1, characterized in that, The negative pressure mechanism has two first sides that are vertically opposite and parallel to each other, two second sides that are front-to-back opposite and parallel to each other, and two third sides that are horizontally opposite and parallel to each other. The width direction of the upper first side extends out of the width direction of the lower first side to form a first extension surface. The upper end of the second side at the front end is bent forward to form a second extended surface, and the second extended surface and the first extended surface are arranged opposite each other and spaced apart. The upper part of the front side of the two third side surfaces bends forward, the upper side surface protrudes forward and extends forward, and the two are connected by a vertical side to form a third extended surface respectively. An air inlet is opened on one of the third side surfaces, and the air inlet is connected to an air inlet pipe. The first extension surface, the second extension surface, and the two third extension surfaces together enclose and define a suction channel, and the outer end face of the suction channel has an opening and is implemented as the dust suction port.

3. The dust removal mechanism according to claim 2, characterized in that, Another third side is fixed with a first connecting plate, the first connecting plate having at least one first connecting hole, the first connecting hole avoiding the third side and the third extended surface and corresponding to the space defined by the second side and the second extended surface at the front end; At least one second connection hole is provided on the side of the mounting base plate that is on the same side as the first connecting plate; The negative pressure mechanism is fixedly connected to the mounting base plate via a second connecting plate. The second connecting plate is an L-shaped plate. The negative pressure mechanism is suspended above the mounting base plate and on the side of the hot press plate assembly via the L-shaped second connecting hole. The second connecting plate is provided with a third connecting hole and a fourth connecting hole corresponding to the first connecting hole and the second connecting hole, respectively.

4. The dust removal mechanism according to claim 3, characterized in that, The third connecting hole is an elongated hole extending horizontally, and the fourth connecting hole is an elongated hole extending vertically.

5. The dust removal mechanism according to claim 2 or 3, characterized in that, The length of the suction port is not less than the width of the support surface on the hot press plate assembly.

6. The dust removal mechanism according to claim 1, characterized in that, A guide rail connecting plate is also fixedly connected to the bottom of the mounting base plate. The guide rail connecting plate is slidably connected to the guide rail via a slider to switch back and forth between the testing station and the material picking station.

7. The dust removal mechanism according to claim 6, characterized in that, The mounting base plate has several fifth connecting holes that extend through its thickness direction, and the guide rail connecting hole has a sixth connecting hole that corresponds one-to-one with the several fifth connecting holes.

8. The dust removal mechanism according to claim 7, characterized in that, The electrode holder plate has at least one seventh connection hole, and the guide rail connecting plate has a corresponding eighth connection hole.

9. The dust removal mechanism according to claim 8, characterized in that, The seventh connecting hole is an elongated hole extending vertically.

10. The dust removal mechanism according to claim 1, characterized in that, The electrode tab support plate includes a vertically extending plate body and a support block integrally formed at the upper end of the plate body in a horizontal direction. The upper surface of the support block is configured as a support surface for supporting the electrode tab, and the support surface is higher than the support surface; and / or The hot press plate assembly includes a heating plate and a heat insulation plate stacked from top to bottom.

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