Dust removal method, dust removal device, dust removal system and battery production system

Abstract

The present application discloses a dust removal method, a dust removal device, a dust removal system and a battery production system, which are used for removing dust from multiple layers of tab ears of an electrode assembly. The dust removal method includes: arranging the multiple layers of tab ears in a dust collection cavity of a dust removal mechanism; controlling a disturbance mechanism to disturb the multiple layers of tab ears; and controlling the dust collection cavity of the dust removal mechanism to form a negative pressure. In the above solution, the multiple layers of tab ears are arranged in the dust collection cavity of the dust removal mechanism, and the removal of pollution particles is achieved by forming a negative pressure in the dust collection cavity. By controlling the disturbance mechanism to disturb the multiple layers of tab ears, the multiple layers of tab ears can be made to vibrate or shake. On the one hand, at least part of the pollution particles between adjacent layers of tab ears can be ejected, and on the other hand, the interlayer gap between adjacent layers of tab ears can also be changed. After the interlayer gap increases, it is more convenient to remove the pollution particles in the interlayer gap, thereby reducing the residual pollution particles inside the multiple layers of tab ears, improving the quality of the electrode assembly, and enhancing the stability and service life of the electrode assembly.

Description

Technical Field

[0001] This application relates to the technical field of dust removal, in particular to a dust removal method, a dust removal device, a dust removal system and a battery production system. Background Art

[0002] A battery cell includes a housing, an electrode assembly and other functional components. The electrode assembly has multiple layers of tabs arranged in a stacked manner. The multiple layers of tabs are first pre-welded into an integrated tab part, and then the whole is welded to a pole column arranged on an end cover of the housing. After the multiple layers of tabs are welded to form an integrated tab part, there will be residual contaminant particles such as metal particles in the tab part. These contaminant particles will enter the interior of the electrode assembly when subjected to vibration or electrolyte injection impact, causing self-discharge failure inside the electrode assembly or short circuit of the electrode assembly, affecting the performance of the electrode assembly. Summary of the Invention

[0003] The main purpose of this application is to provide a dust removal method, a dust removal device, a dust removal system and a battery production system to reduce the residual contaminant particles inside the tab part of the electrode assembly.

[0004] To achieve the above object, the first technical solution provided by this application is: A dust removal method for removing dust from multiple layers of tabs of an electrode assembly, the dust removal method comprising: disposing the multiple layers of tabs in a dust collection cavity of a dust removal mechanism; controlling a perturbation mechanism to perturb the multiple layers of tabs; and controlling the dust collection cavity of the dust removal mechanism to form a negative pressure.

[0005] The beneficial effect of the dust removal method provided by this application is: The multiple layers of tabs are disposed in the dust collection cavity of the dust removal mechanism, and the dust collection cavity can enclose the multiple layers of tabs therein. By forming a negative pressure in the dust collection cavity, the removal of contaminant particles is achieved. Controlling the perturbation mechanism to perturb the multiple layers of tabs can cause the multiple layers of tabs to vibrate or shake. On the one hand, when the multiple layers of tabs vibrate or shake, at least part of the contaminant particles between adjacent layers of tabs can be ejected. On the other hand, the vibration or shaking of the multiple layers of tabs can also change the interlayer gap between adjacent layers of tabs. After the interlayer gap increases, it is more convenient to remove the contaminant particles in the interlayer gap. The dust removal device provided by this application can be used to remove dust from multiple layers of tabs before welding, reduce the residual contaminant particles in the interlayer gap of the multiple layers of tabs, and further reduce the residual contaminant particles inside the tab part formed by welding the multiple layers of tabs into an integrated body, thereby improving the quality of the electrode assembly, and improving the stability and service life of the electrode assembly.

[0006] In some embodiments, the step of controlling the perturbation mechanism to perturb the multiple layers of tabs includes: controlling the perturbation mechanism to strike the multiple layers of tabs at least once from one side of the multiple layers of tabs along the stacking direction of the multiple layers of tabs.

[0007] Controlling the disturbance mechanism to strike the multi-layer pole ear can have a disturbance effect on the multi-layer pole ear while reducing friction and scratches on the multi-layer pole ear.

[0008] In some embodiments, the step of controlling the disturbance mechanism to disturb the multi-layered pole tab includes: controlling the disturbance mechanism to move the multi-layered pole tab at least once from opposite sides of the multi-layered pole tab along the stacking direction of the multi-layered pole tab.

[0009] Controlling the disturbance mechanism to move the multi-layer pole ears can have a disturbance effect on the multi-layer pole ears. At the same time, the disturbance mechanism can detach the pole ears of different layers in turn, so that the pole ears of adjacent layers can be opened and closed in turn, which can expose the polluted particles sandwiched between the pole ears of adjacent layers to a greater extent, and the effect of removing the polluted particles is better.

[0010] In some embodiments, the disturbance mechanism includes a dust suction channel; the step of controlling the disturbance mechanism to disturb the multi-layer pole ear includes: generating negative pressure in the dust suction channel, and removing dust from the multi-layer pole ear through the dust suction channel.

[0011] Negative pressure is generated in the dust suction channel. Therefore, during the process of the disturbance mechanism disturbing the multi-layer pole ears, or after the disturbance mechanism disturbs the multi-layer pole ears, the polluted particles in the interlayer gaps of the multi-layer pole ears can be sucked away through the dust suction channel under the action of the negative pressure in the dust suction channel, thereby achieving dust removal for the multi-layer pole ears and further enhancing the dust removal effect for the multi-layer pole ears.

[0012] In some embodiments, the negative pressure wind speed of the dust suction channel is 1~3m / s.

[0013] Limiting the negative pressure wind speed of the dust suction channel to this range can alleviate the problem of poor absorption of polluted particles due to too low negative pressure wind speed in the dust suction channel, as well as the problem of adsorption of multi-layer pole ears and disturbance of multi-layer pole ears due to too high negative pressure wind speed in the dust suction channel.

[0014] In some embodiments, the negative pressure wind speed of the dust collecting chamber is 15-25 m / s.

[0015] Limiting the negative pressure wind speed of the dust collecting chamber to this range can alleviate the problem of poor absorption of polluted particles due to too low negative pressure wind speed in the dust collecting chamber, as well as the problem of disturbing the multi-layer pole ears due to too high negative pressure wind speed in the dust collecting chamber.

[0016] In some embodiments, the dust collecting chamber has an inlet and an air outlet; the air outlet is connected to the exhaust assembly through a pipe; wherein, the step of arranging the multi-layer pole ear in the dust collecting chamber of the dust removal mechanism includes: inserting the multi-layer pole ear into the dust collecting chamber from the inlet, and spacing the end of the multi-layer pole ear from the air outlet; wherein, along the direction from the root to the end of the multi-layer pole ear, the spacing between the end of the multi-layer pole ear and the air outlet is 5~10mm.

[0017] The air extraction assembly sucks the air in the dust collection chamber away from the dust collection chamber through a pipeline, creating a negative pressure in the dust collection chamber. The air in the dust collection chamber, together with the pollution particles, is sucked away through the air outlet along the pipeline. In addition, the air outside the dust collection chamber can also enter the dust collection chamber through the inlet. Therefore, the air in the dust collection chamber is flowing and in a negative pressure state, facilitating the sucking away of the pollution particles in the dust collection chamber through the air outlet.

[0018] The multi-layer tabs are inserted into the dust collection chamber from the inlet. The ends of the multi-layer tabs are spaced from the air outlet, reducing the interference when the air outlet disturbs the multi-layer tabs. And the distance between the ends of the multi-layer tabs and the air outlet is limited within the range of 5-10 mm, which can reduce the risk that the ends of the multi-layer tabs are easily scratched due to too small a distance between the ends of the multi-layer tabs and the air outlet, and can also reduce the risk that the pollution particles are difficult to be discharged from the air outlet due to too large a distance between the ends of the multi-layer tabs and the air outlet.

[0019] In some embodiments, along the direction from the root to the end of the multi-layer tabs, the inlet and the air outlet are oppositely arranged; wherein, the step of arranging the multi-layer tabs in the dust collection chamber of the dust removal mechanism includes: inserting the multi-layer tabs into the dust collection chamber from the inlet along the direction from the root to the end of the multi-layer tabs.

[0020] The multi-layer tabs are inserted into the dust collection chamber from the inlet along the direction from the root to the end of the multi-layer tabs. Since the inlet and the air outlet are oppositely arranged, after the multi-layer tabs are inserted into the dust collection chamber, the ends of the multi-layer tabs are exactly opposite to the air outlet, facilitating the sucking away of the inter-layer pollution particles of the multi-layer tabs through the air outlet.

[0021] In some embodiments, the direction from the root to the end of the multi-layer tabs is defined as the first direction, the stacking direction of the multi-layer tabs is defined as the second direction, and a third direction is defined to intersect both the first direction and the second direction; along the first direction, the dust collection chamber has opposite first side walls and third side walls; along the third direction, the dust collection chamber has opposite second side walls and fourth side walls; the first side wall has an air outlet, the second side wall has an inlet, the fourth side wall has an outlet, and the third side wall has an avoidance opening connecting the inlet and the outlet; wherein, the step of arranging the multi-layer tabs in the dust collection chamber of the dust removal mechanism includes: inserting the multi-layer tabs into the dust collection chamber from the inlet along the third direction; the dust removal method further includes: after the dust removal is completed, moving the multi-layer tabs out of the dust collection chamber from the outlet along the third direction.

[0022] When the multi-layer tabs are inserted into the dust collection chamber through the inlet and when the multi-layer tabs are moved out of the dust collection chamber from the outlet, the multi-layer tabs all move along the third direction, which is more convenient for the transmission of the electrode assembly, and can sequentially transmit and remove dust from multiple electrode assemblies along the third direction, thereby realizing the assembly line operation of dust removal of the multi-layer tabs of multiple electrode assemblies.

[0023] In some embodiments, along the stacking direction of the multi-layer tabs, the dust collection cavity has opposite top and bottom walls; the top wall has a through hole; the disturbing mechanism includes a driving member and a disturbing member, the driving member is arranged outside the dust collection cavity, one end of the disturbing member is arranged inside the dust collection cavity, and the other end extends from the through hole to the outside of the dust collection cavity and is connected to the driving member; wherein, the driving member is used to drive the disturbing member to move, so as to disturb the multi-layer tabs.

[0024] The disturbing mechanism includes a driving member and a disturbing member. The driving member serves as a power source, and the disturbing member serves as an implementing member. The driving member can drive the disturbing member to move to disturb the multi-layer tabs. Arranging the driving member outside the dust collection cavity can reduce the influence of the pollution particles in the dust collection cavity on the driving member, and also alleviate the problem that the size of the dust collection cavity needs to be set relatively large due to the driving member being arranged inside the dust collection cavity. Since the multi-layer tabs are located inside the dust collection cavity, one end of the disturbing member needs to be located inside the dust collection cavity to disturb the multi-layer tabs inside the dust collection cavity, and the other end of the disturbing member needs to be located outside the dust collection cavity to connect to the driving member.

[0025] In some embodiments, the disturbing member includes a disturbing block and a connecting rod. The disturbing block is arranged inside the dust collection cavity and is used to abut against the multi-layer tabs; one end of the connecting rod is arranged inside the dust collection cavity and is connected to the disturbing block, and the other end extends from the through hole to the outside of the dust collection cavity and is connected to the driving member.

[0026] The disturbing block serves as a component for abutting against the multi-layer tabs, and the connecting rod serves as an intermediate connecting member for connecting the disturbing block and the driving member. Driven by the driving member, the connecting rod moves together with the disturbing block. The disturbing member is set as two components, and the two components jointly form the disturbing member. Among them, the disturbing block mainly plays the role of disturbing the multi-layer tabs, and the connecting rod mainly plays the role of connecting the disturbing block to the driving member. Therefore, the materials of the disturbing block and the connecting rod can be selected respectively to achieve a better disturbing effect of the disturbing block on the multi-layer tabs and a more stable connecting effect of the connecting rod.

[0027] In some embodiments, the disturbing block is a flexible member, or at least the surface of the disturbing block for abutting against the multi-layer tabs is coated with a flexible layer.

[0028] In this way, the risk of scratching the multi-layer tabs by the disturbing block can be reduced.

[0029] In some embodiments, the multi-layer tabs are of a planar structure, and the surface of the disturbing block facing the multi-layer tabs is inclined with respect to the multi-layer tabs; along the direction from the root to the end of the multi-layer tabs, the distance between the surface of the disturbing block facing the multi-layer tabs and the multi-layer tabs gradually decreases.

[0030] The surface of the perturbation block facing the multi-layer tab is inclined relative to the multi-layer tab, which can adapt to the shape after the bending deformation of the multi-layer tab. During the bending deformation of the multi-layer tab, the perturbation block can make contact with the multi-layer tab as much as possible through the surface of the perturbation block facing the multi-layer tab, increasing the contact area between the perturbation block and the multi-layer tab, and minimizing the local depression deformation defect of the multi-layer tab caused by the extrusion of the edge of the perturbation block on the multi-layer tab due to large local stress.

[0031] In some embodiments, the included angle between the surface of the perturbation block facing the multi-layer tab and the multi-layer tab is 5 to 45 degrees.

[0032] Limiting the included angle between the surface of the perturbation block facing the multi-layer tab and the multi-layer tab within this range can reduce the problem that the edge of the perturbation block is prone to extruding the multi-layer tab due to too small an included angle, and reduce the problem that the contact area between the perturbation block and the multi-layer tab is too small due to too large an included angle.

[0033] In some embodiments, along the direction from the root to the end of the multi-layer tab, the surface of the perturbation block facing the multi-layer tab is connected to the side surface of the perturbation block to form two corners; wherein, the step of disposing the multi-layer tab in the dust collection chamber of the dust removal mechanism further includes: making the perturbation block located between the multi-layer tab and the top wall; along the stacking direction of the multi-layer tab, the projection of one corner on the plane where the multi-layer tab is located is located on the multi-layer tab, and the projection of the other corner on the plane where the multi-layer tab is located is located outside the multi-layer tab.

[0034] When the surface of the perturbation block facing the multi-layer tab is inclined, along the stacking direction of the multi-layer tab, the projection of one corner on the plane where the multi-layer tab is located is located on the multi-layer tab, and the projection of the other corner on the plane where the multi-layer tab is located is located outside the multi-layer tab. In this way, the perturbation block contacts the multi-layer tab through the surface of the perturbation block facing the multi-layer tab, which can further reduce the risk of the corner extruding the tab.

[0035] In some embodiments, at least the corner whose projection is located on the multi-layer tab has a smooth transition.

[0036] Setting the corner whose projection is located on the multi-layer tab to have a smooth transition can reduce the risk of scratching the multi-layer tab by this corner to a certain extent.

[0037] In some embodiments, along the stacking direction of the multi-layer tab, the ratio of the width of the projection of the surface of the perturbation block facing the multi-layer tab on the multi-layer tab to the width of the multi-layer tab is 1 / 3 to 2 / 3; wherein, the width of the projection is the dimension in the direction from the root to the end of the multi-layer tab, and the width of the multi-layer tab is the dimension in the direction from the root to the end of the multi-layer tab.

[0038] The ratio of the width of the projection of the disturbance block on the surface of the multi-layer tab to the width of the multi-layer tab is limited between 1 / 3 and 2 / 3, which can reduce the risk that the disturbance effect of the disturbance block on the multi-layer tab is not obvious due to too small a width ratio of the projection, and reduce the risk that the multi-layer tab undergoes inelastic deformation due to too large a width ratio of the projection.

[0039] To achieve the above object, the second technical solution provided by this application is: a dust removal device for removing dust from the multi-layer tabs of an electrode assembly. The dust removal device includes a dust removal mechanism and a disturbance mechanism; the dust removal mechanism has a dust collection chamber with an inlet and an air outlet, the air outlet is connected to an air extraction component, and the inlet is for the multi-layer tabs to be inserted into the dust collection chamber; the disturbance mechanism is connected to the dust removal mechanism, and at least part of the disturbance mechanism is arranged in the dust collection chamber, and the disturbance mechanism is used to disturb the multi-layer tabs located in the dust collection chamber.

[0040] The beneficial effect of the dust removal device provided by this application is: the dust removal device is used to remove dust from the multi-layer tabs of the electrode assembly. In the dust removal device, the dust collection chamber of the dust removal mechanism is used for the multi-layer tabs to be inserted into it through the inlet, and the air outlet of the dust collection chamber is used to connect to the air extraction component, so that a negative pressure is formed in the dust collection chamber to suck the pollution particles inside the multi-layer tabs, thereby removing the pollution particles inside the multi-layer tabs. The disturbance mechanism can disturb the multi-layer tabs located in the dust collection chamber, so that the multi-layer tabs vibrate or shake. On the one hand, when the multi-layer tabs vibrate or shake, at least part of the pollution particles between adjacent layers of tabs can be ejected. On the other hand, the vibration or shaking of the multi-layer tabs can also change the interlayer gap between adjacent layers of tabs. After the interlayer gap increases, it is more convenient to remove the pollution particles in the interlayer gap, thereby reducing the residual pollution particles inside the tab part formed by welding the multi-layer tabs together, improving the quality of the electrode assembly, and improving the stability and service life of the electrode assembly.

[0041] In some embodiments, along the first direction, the dust collection chamber has opposite first side walls and third side walls; along the second direction, the dust collection chamber has opposite top and bottom walls; along the third direction, the dust collection chamber has opposite second side walls and fourth side walls; wherein, the first direction, the second direction and the third direction are pairwise crossed; the first side wall has an air outlet, the second side wall has an inlet, the fourth side wall has an outlet, and the third side wall has an avoidance opening connecting the inlet and the outlet; the outlet is for the multi-layer tabs to move out of the dust collection chamber.

[0042] The multi-layer tab can be inserted into the dust collection chamber through the inlet, and can be removed from the dust collection chamber through the outlet. When the multi-layer tab is inserted into and removed from the dust collection chamber, the multi-layer tab can be avoided through the avoidance port, reducing the interference when the multi-layer tab is inserted into and removed from the dust collection chamber. Moreover, when the multi-layer tab is inserted into and removed from the dust collection chamber, it moves along the third direction, which is more convenient for transporting the electrode assembly. And along the third direction, multiple electrode assemblies can be transported and dust-removed in sequence, thereby realizing the pipeline operation of dust removal for the multi-layer tabs of multiple electrode assemblies.

[0043] In some embodiments, along the first direction, the distance between the inlet and the first side wall is 4 - 9 mm, and the distance between the outlet and the first side wall is 4 - 9 mm.

[0044] After the multi-layer tab is inserted into the dust collection chamber, a suitable distance should be maintained between the end of the multi-layer tab and the first side wall. Since the multi-layer tab is inserted into the dust collection chamber through the inlet along the third direction and removed from the dust collection chamber through the outlet along the third direction, along the first direction, the distance between the inlet and the first side wall can be slightly smaller than the distance between the end of the multi-layer tab and the first side wall. Limiting the distance between the inlet and the first side wall and the distance between the outlet and the first side wall within the range of 4 - 9 mm can enable a suitable distance to be maintained between the end of the multi-layer tab and the first side wall, reducing the risk that the end of the multi-layer tab is easily scratched by the first side wall due to too small a distance between the end of the multi-layer tab and the first side wall, and reducing the risk that it is difficult for pollution particles to be discharged from the air outlet due to too large a distance between the end of the multi-layer tab and the first side wall.

[0045] In some embodiments, the perturbation mechanism has a first surface located in the dust collection chamber and facing away from the top wall, and the first surface is inclined relative to the first direction; along the direction from the third side wall to the first side wall, the distance between the first surface and the bottom wall gradually decreases; the bottom wall is parallel to the first direction.

[0046] The first surface of the perturbation mechanism is inclined relative to the first direction. Therefore, after the multi-layer tab is inserted into the dust collection chamber, the first surface of the perturbation mechanism is also inclined relative to the multi-layer tab. The perturbation mechanism can contact and squeeze the multi-layer tab through the first surface. The inclined first surface can better adapt to the shape of the multi-layer tab after bending deformation. During the bending deformation of the multi-layer tab, the perturbation mechanism can try to contact the multi-layer tab through the first surface, increasing the contact area between the perturbation mechanism and the multi-layer tab, and minimizing the local depression deformation defect of the multi-layer tab caused by the extrusion of the edge of the perturbation mechanism on the multi-layer tab due to relatively large local stress.

[0047] In some embodiments, the included angle between the first surface and the bottom wall is 5 - 45 degrees.

[0048] The included angle between the first surface and the bottom wall is limited within this range. After the multi-layer tabs are inserted into the dust collection cavity, the included angle between the first surface and the multi-layer tabs is also limited within this range, which can reduce the problem that the edge of the disturbing mechanism is prone to squeezing the multi-layer tabs due to too small an included angle, and reduce the problem that the contact area between the disturbing mechanism and the multi-layer tabs is too small due to too large an included angle.

[0049] In some embodiments, the disturbing mechanism further has two second surfaces connected to the first surface. Along the first direction, the first surface and the second surface are connected to form a corner, and the corner has a smooth transition.

[0050] Setting the corner to have a smooth transition can, to a certain extent, reduce the risk of scratching the multi-layer tabs by this corner.

[0051] In some embodiments, the disturbing mechanism includes a dust suction channel.

[0052] The disturbing mechanism itself has a dust suction channel. During the process of the disturbing mechanism disturbing the multi-layer tabs, or after the disturbing mechanism disturbs the multi-layer tabs, the contaminated particles in the inter-layer gap of the multi-layer tabs can be sucked away through the dust suction channel, thereby realizing dust removal of the multi-layer tabs and further enhancing the dust removal effect on the multi-layer tabs.

[0053] In some embodiments, the top wall has a through hole, and the disturbing mechanism includes a driving member and a disturbing member; the driving member is arranged outside the dust collection cavity; one end of the disturbing member is arranged inside the dust collection cavity, and the other end extends from the through hole to the outside of the dust collection cavity and is connected to the driving member; wherein, the driving member is used to drive the disturbing member to move, thereby disturbing the multi-layer tabs.

[0054] The disturbing mechanism includes a driving member and a disturbing member. The driving member serves as a power source, and the disturbing member serves as an implementing member. The driving member can drive the disturbing member to move to disturb the multi-layer tabs. Arranging the driving member outside the dust collection cavity can reduce the influence of the contaminated particles in the dust collection cavity on the driving member, and also alleviate the problem that the size of the dust collection cavity needs to be set relatively large due to the driving member being arranged inside the dust collection cavity. Since the multi-layer tabs are located inside the dust collection cavity, one end of the disturbing member needs to be located inside the dust collection cavity to disturb the multi-layer tabs inside the dust collection cavity, and the other end of the disturbing member needs to be located outside the dust collection cavity to connect to the driving member.

[0055] In some embodiments, the disturbing member includes a disturbing block and a connecting rod; the disturbing block is arranged inside the dust collection cavity and is used to abut against the multi-layer tabs; one end of the connecting rod is arranged inside the dust collection cavity and is connected to the disturbing block, and the other end extends from the through hole to the outside of the dust collection cavity and is connected to the driving member.

[0056] The disturbance block serves as a component that abuts against multiple layers of tab ears, and the connecting rod serves as an intermediate connecting member that connects the disturbance block to the driving member. Driven by the driving member, the connecting rod moves together with the disturbance block. The disturbance member is set as two components, and the two components together form the disturbance member. Among them, the disturbance block mainly functions to disturb the multiple layers of tab ears, and the connecting rod mainly functions to connect the disturbance block to the driving member. Therefore, the materials of the disturbance block and the connecting rod can be selected separately to achieve a better disturbance effect of the disturbance block on the multiple layers of tab ears and a more stable connection effect of the connecting rod.

[0057] In some embodiments, the disturbance mechanism includes a dust suction channel. One end of the dust suction channel penetrates through the disturbance block, and the other end penetrates through the part of the connecting rod located outside the dust collection chamber.

[0058] The disturbance mechanism itself has a dust suction channel. During the process of the disturbance mechanism disturbing the multiple layers of tab ears, or after the disturbance mechanism disturbs the multiple layers of tab ears, the pollution particles in the interlayer gap of the multiple layers of tab ears can be sucked out of the dust collection chamber through the dust suction channel, thereby realizing dust removal of the multiple layers of tab ears and further enhancing the dust removal effect on the multiple layers of tab ears.

[0059] In some embodiments, the disturbance block is a flexible member, or at least the surface of the disturbance block that is used to abut against the multiple layers of tab ears is coated with a flexible layer.

[0060] In this way, the risk of scratching the multiple layers of tab ears by the disturbance block can be reduced.

[0061] To achieve the above object, the third technical solution provided by this application is: a dust removal system, including a dust removal device, a transmission mechanism, and a controller; the dust removal device adopts the dust removal device of any of the above solutions; the transmission mechanism is used to move the electrode assembly so that the multiple layers of tab ears are inserted into the dust collection chamber from the inlet; the controller is electrically connected to the dust removal mechanism and the disturbance mechanism respectively, and is used to control the disturbance mechanism to disturb the multiple layers of tab ears located in the dust collection chamber and control the dust removal mechanism to perform dust removal on the multiple layers of tab ears after the multiple layers of tab ears are inserted into the dust collection chamber from the inlet.

[0062] The beneficial effects of the dust removal system provided by this application are as follows: The dust removal device is used to remove dust from the multi-layer tabs of the electrode assembly. In the dust removal device, the dust collection chamber of the dust removal mechanism is used for the multi-layer tabs to be inserted through the inlet, and the air outlet of the dust collection chamber is used to connect to the air extraction assembly, so that a negative pressure is formed in the dust collection chamber to suck the pollution particles inside the multi-layer tabs, thereby removing the pollution particles inside the multi-layer tabs. The perturbation mechanism can perturb the multi-layer tabs located in the dust collection chamber, causing the multi-layer tabs to vibrate or shake. On the one hand, when the multi-layer tabs vibrate or shake, at least some of the pollution particles between adjacent layers of tabs can be ejected. On the other hand, the vibration or shaking of the multi-layer tabs can also change the inter-layer gap between adjacent layers of tabs. After the inter-layer gap increases, it is more convenient to remove the pollution particles in the inter-layer gap, thereby reducing the residual pollution particles inside the tab part formed by welding the multi-layer tabs together, improving the quality of the electrode assembly, and enhancing the stability and service life of the electrode assembly; The electrode assembly is transported through the transport mechanism, which facilitates the insertion of the multi-layer tabs of the electrode assembly into the dust collection chamber and is conducive to improving the automation of the electrode assembly transportation; The controller controls the perturbation of the multi-layer tabs by the perturbation mechanism and controls the dust removal of the multi-layer tabs by the dust removal mechanism, which is conducive to the automation of the dust removal process.

[0063] To achieve the above object, the fourth technical solution provided by this application is: A battery production system includes a dust removal device and a welding device. The dust removal device adopts the dust removal device of any of the above solutions. The dust removal device is used to remove dust from the multi-layer tabs of the electrode assembly. The welding device is located downstream of the dust removal device and is used to weld the multi-layer tabs of the electrode assembly that have been dust-removed by the dust removal device.

[0064] In the battery production system provided by this application, the dust removal device is used to remove dust from the multi-layer tabs of the electrode assembly. In the dust removal device, the dust collection chamber of the dust removal mechanism is used for the multi-layer tabs to be inserted through the inlet, and the air outlet of the dust collection chamber is used to connect to the air extraction assembly, so that a negative pressure is formed in the dust collection chamber to suck the pollution particles inside the multi-layer tabs, thereby removing the pollution particles inside the multi-layer tabs. The perturbation mechanism can perturb the multi-layer tabs located in the dust collection chamber, causing the multi-layer tabs to vibrate or shake. On the one hand, when the multi-layer tabs vibrate or shake, at least some of the pollution particles between adjacent layers of tabs can be ejected. On the other hand, the vibration or shaking of the multi-layer tabs can also change the inter-layer gap between adjacent layers of tabs. After the inter-layer gap increases, it is more convenient to remove the pollution particles in the inter-layer gap, thereby reducing the residual pollution particles inside the multi-layer tabs; The welding device welds the multi-layer tabs of the electrode assembly that have been dust-removed by the dust removal device. There are fewer residual pollution particles inside the tab part formed by welding the multi-layer tabs of the electrode assembly, which can improve the quality of the electrode assembly, and enhance the stability and service life of the electrode assembly. Brief Description of the Drawings

[0065] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings, where:

[0066] Figure 1 is a schematic flowchart of the first embodiment of the dust removal method provided by the present application;

[0067] Figure 2 is a schematic diagram of the relative positional relationship between the electrode assembly, the dust removal mechanism, and the perturbation mechanism in the dust removal method provided by the present application;

[0068] Figure 3 is Figure 2 a schematic diagram of the positional relationship from another perspective;

[0069] Figure 4 is a schematic diagram of the process of the perturbation mechanism perturbing the multi-layer tabs of the electrode assembly in the dust removal method provided by the present application;

[0070] Figure 5 is a schematic flowchart of the second embodiment of the dust removal method provided by the present application;

[0071] Figure 6 is a schematic flowchart of the third embodiment of the dust removal method provided by the present application;

[0072] Figure 7 is a schematic diagram of the cooperation structure between the electrode assembly and the perturbation mechanism in the dust removal method provided by the embodiments of the present application;

[0073] Figure 8 is Figure 1 a schematic flowchart of an embodiment of step S20 in the shown dust removal method;

[0074] Figure 9 is a schematic flowchart of the fourth embodiment of the dust removal method provided by the present application;

[0075] Figure 10 is another schematic diagram of the relative positional relationship between the electrode assembly, the dust removal mechanism, and the perturbation mechanism in the dust removal method provided by the present application;

[0076] Figure 11 is a schematic flowchart of the fifth embodiment of the dust removal method provided by the present application;

[0077] Figure 12 is a schematic flowchart of the sixth embodiment of the dust removal method provided by the present application;

[0078] Figure 13 It is a schematic structural diagram of the cooperation between the electrode assembly and the transmission mechanism in the dust removal method provided by the embodiments of the present application.

[0079] Description of the reference numerals:

[0080] Dust removal device 100; dust removal mechanism 110; dust collection hood 111; first side wall 111A; second side wall 111B; third side wall 111C; fourth side wall 111D; top wall 111E; bottom wall 111F; dust collection cavity 101; inlet 102; air outlet 103; avoidance opening 104; outlet 105; through hole 106; air extraction assembly 112; pipeline 113; disturbance mechanism 120; driving member 121; disturbance member 122; dust suction channel 1220; disturbance block 1221; first surface 1221A; corner 1221B; second surface 1221C; connecting rod 1222; electrode assembly 200; tab 210; main body portion 220; transmission mechanism 300; first direction X; second direction Y; third direction Z. Detailed implementation manners

[0081] It should be noted that, without conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other. The detailed description in the specific implementation manners should be understood as an explanatory illustration of the purpose of the present application and should not be regarded as an improper limitation to the present application.

[0082] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusion.

[0083] In the description of the embodiments of the present application, technical terms such as "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0084] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0085] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0086] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", "height direction", "first direction", and "second direction" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0087] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0088] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0089] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices can be power batteries, which are power sources for tools. Power batteries mostly refer to batteries that provide power for electric vehicles, electric trains, electric bicycles, golf carts and other transportation vehicles, as well as aerospace. Of course, battery devices can also be energy storage batteries, which refer to batteries used to store energy from renewable energy sources such as hydropower, thermal power, wind power and solar power stations. With the continuous expansion of the application fields of battery devices, the market demand is also constantly expanding.

[0090] In the related art, a battery device generally includes a battery case and a plurality of battery cells. The tab and the terminal are key components of the battery cell, playing an important role in current conduction and current shunting. Specifically, the electrode assembly (which can also be called a bare battery cell) formed by winding or stacking has multiple layers of tabs arranged in layers, that is, each layer of tab is in an independent state and there is no connection between adjacent tabs.

[0091] For a battery adopting a structure without a transition piece, generally, multiple layers of tabs arranged in layers are welded together by ultrasonic welding to form a plate-shaped tab part, and then the welded plate-shaped tab part is welded to the corresponding terminal by laser welding to achieve connection and electrical conduction with the terminal.

[0092] For a battery adopting a structure with a transition piece, generally, a transition piece is used to conduct a transition connection between multiple layers of tabs arranged in layers. Specifically, it is necessary to first pre-weld the multiple layers of tabs to connect them into a single body to form a plate-shaped tab part, and then weld the welded plate-shaped tab part to one side of the transition piece. After that, the other side of the transition piece is welded to the terminal.

[0093] Regardless of the battery structure adopted (with or without a transition piece), it is necessary to pre-weld multiple layers of tabs arranged in layers to form an integral tab part, and then directly weld the integral tab part to the corresponding terminal or weld it to the corresponding terminal through a transition piece. Before the multiple layers of tabs are welded into an integral tab part, due to contamination by process dust during the slitting and winding processes (such as contamination by foil cutting dust, cross-contamination during passing through rollers, etc.), there will be residual metal and other contamination particles between adjacent layers of tabs. After the multiple layers of tabs are welded into an integral tab part, these contamination particles remain inside the tab part and will enter the electrode assembly during vibration or electrolyte injection impact, causing self-discharge failure inside the electrode assembly or causing a short circuit in the battery, affecting the performance of the battery.

[0094] Based on the above considerations, in order to reduce the residual contamination particles inside the tab portion of the electrode assembly, the embodiments of the present application provide a dust removal method for removing dust from multiple layers of tabs of the electrode assembly. The dust removal method includes: disposing the multiple layers of tabs in the dust collection cavity of the dust removal mechanism; controlling the disturbance mechanism to disturb the multiple layers of tabs; and controlling the dust collection cavity of the dust removal mechanism to form a negative pressure. By disposing the multiple layers of tabs in the dust collection cavity, the dust collection cavity can cover the multiple layers of tabs therein, and the removal of contamination particles is achieved by forming a negative pressure in the dust collection cavity. Controlling the disturbance mechanism to disturb the multiple layers of tabs can cause the multiple layers of tabs to vibrate, shake or sway. When the multiple layers of tabs vibrate, shake or sway, the contamination particles between adjacent layers of tabs can be ejected, so that the interlayer particle residue of the multiple layers of tabs can be reduced, and further the residual contamination particles inside the tab portion formed by welding the multiple layers of tabs together can be reduced, thereby improving the quality of the electrode assembly, and enhancing the stability and service life of the electrode assembly.

[0095] The dust removal method disclosed in the embodiments of the present application can be but is not limited to being used in the production of battery devices. The produced battery devices can be used in power systems of electrical devices such as vehicles, ships or aircraft. The power system of the electrical device can be composed of battery devices processed by the dust removal method disclosed in the embodiments of the present application. In this way, it is beneficial to improve the quality of the battery device, enhance the stability of the battery device and the battery life.

[0096] The electrical device can be but is not limited to mobile phones, tablets, laptop computers, electric toys, power tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, for example, game consoles, electric vehicle toys, electric ship toys and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles and spaceships, etc.

[0097] In the battery device, there can be multiple battery cells. The multiple battery cells can be connected in series, parallel or in a series-parallel combination. The series-parallel combination means that there are both series and parallel connections among the multiple battery cells. The multiple battery cells can be directly connected in series, parallel or in a series-parallel combination and then the whole formed by the multiple battery cells is accommodated in a box body; of course, the battery device can also be in the form that multiple battery cells are first connected in series, parallel or in a series-parallel combination to form battery modules, and then the multiple battery modules are connected in series, parallel or in a series-parallel combination to form a whole and are accommodated in a box body. The battery device can also include other structures. For example, the battery device can also include a busbar component for realizing the electrical connection among the multiple battery cells.

[0098] Among them, each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell can be in a cylindrical shape, a flat shape, a cuboid shape or other shapes, etc.

[0099] A battery cell refers to the smallest unit that makes up a battery device. A battery cell may include a housing, an electrode assembly, and other functional components. The housing includes an end cap and a casing.

[0100] The end cap refers to a component that covers the opening of the casing to isolate the internal environment of the battery cell from the external environment. Without limitation, the shape of the end cap can be adapted to the shape of the casing to fit the casing. Optionally, the end cap can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap is not easily deformed when subjected to extrusion and collision, enabling the battery cell to have higher structural strength and improved safety performance. Functional components such as electrode terminals can be provided on the end cap. The electrode terminals can be used to electrically connect to the electrode assembly for outputting or inputting the electrical energy of the battery cell. In some embodiments, the electrode terminals may include pole columns. The pole columns may include a positive pole column and a negative pole column for current output and connection to an external circuit. In some embodiments, an explosion-proof component for releasing the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold may also be provided on the end cap. The material of the end cap can also be diverse. For example, the material of the end cap includes but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating component can also be provided on the inner side of the end cap. The insulating component can be used to isolate the electrical connection components inside the casing from the end cap to reduce the risk of short circuit. Exemplarily, the insulating component can be plastic, rubber, etc.

[0101] The casing is a component used to cooperate with the end cap to form the internal environment of the battery cell. Among them, the formed internal environment can be used to accommodate the electrode assembly, electrolyte, and other components. The casing and the end cap can be independent components. An opening can be provided on the casing, and the end cap is covered on the opening to form the internal environment of the battery cell. Without limitation, the end cap and the casing can also be integrated. Specifically, the end cap and the casing can form a common connection surface before other components are put into the casing. When it is necessary to encapsulate the inside of the casing, the end cap is then covered on the casing. The casing can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the casing can be determined according to the specific shape and size of the electrode assembly. The material of the casing can be diverse. For example, the material of the casing includes but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0102] The electrode assembly is a component in the battery cell where electrochemical reactions occur. The housing can contain one or more electrode assemblies. The electrode assembly is mainly formed by winding or laminating a positive electrode sheet and a negative electrode sheet, and usually a separator is provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials respectively constitute the electrode tabs. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or separately at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the electrode tabs are connected to the electrode terminals to form a current loop.

[0103] The dust removal method provided by the embodiment of the present application is used to remove dust from the multi-layer electrode tabs of the electrode assembly, which can reduce the residue of pollution particles in the interlayer gap of the multi-layer electrode tabs, thereby improving the quality of the electrode assembly, and enhancing the stability and service life of the electrode assembly. The following specifically describes the principle of how the dust removal method provided by the present application reduces the residue of pollution particles in the interlayer gap of the multi-layer electrode tabs in conjunction with the accompanying drawings.

[0104] The embodiment of the present application provides a dust removal method for removing dust from the multi-layer electrode tabs of the electrode assembly. Please refer to Figure 1 , Figure 1 which is a schematic flow chart of the first embodiment of the dust removal method provided by the present application. Specifically, the dust removal method can include the following steps:

[0105] Step S10: Place the multi-layer electrode tabs in the dust collection chamber of the dust removal mechanism.

[0106] Taking Figure 2 and Figure 3 as an example to specifically illustrate the relative position relationship between the electrode assembly 200 and the dust removal mechanism 110.

[0107] The electrode assembly 200 generally includes a main body 220 and multi-layer electrode tabs 210 arranged in a stacked manner. The main body 220 can be in various shapes, such as square, cylindrical, hexagonal prism-shaped, etc. In the embodiment of the present application, the shape of the main body 220 is taken as a square for illustration. Generally speaking, for the square main body 220, it has a thickness direction, and the multi-layer electrode tabs 210 are stacked along the thickness direction of the main body 220, that is, the stacking direction of the multi-layer electrode tabs 210 is the thickness direction of the main body 220.

[0108] The electrode tabs 210 can be sheet-shaped. Each layer of electrode tabs 210 is in an independent state, and there is no connection between adjacent layers of electrode tabs 210. There is a gap between adjacent layers of electrode tabs 210, and this gap can also be called the interlayer gap of the multi-layer electrode tabs 210. The multi-layer electrode tabs 210 as a whole generally form a plate-like structure with a certain thickness.

[0109] During the slitting and winding processes, the multi-layer tabs 210 of the electrode assembly 200 may be contaminated by process dust (such as foil cutting dust contamination, cross contamination during passing through rollers, etc.), and the contaminated particles will remain in the interlayer gaps of the multi-layer tabs 210.

[0110] The dust removal mechanism 110 is used to remove the contaminated particles. For example, a negative pressure can be formed in the dust collection chamber 101 of the dust removal mechanism 110 through an air extraction component. Under the action of the negative pressure, the contaminated particles can be sucked from the dust collection chamber 101 of the dust removal mechanism 110 to the outside of the dust collection chamber 101.

[0111] The dust collection chamber 101 of the dust removal mechanism 110 is used to cover the multi-layer tabs 210 therein, facilitating the collection of contaminated particles. At the same time, the dust collection chamber 101 is used to surround the multi-layer tabs 210 in a smaller space, facilitating the formation of a better negative pressure environment in this smaller space, so as to more easily suck away the contaminated particles.

[0112] Exemplarily, the dust removal mechanism 110 includes a dust collection cover 111. The above-mentioned dust collection chamber 101 is formed inside the dust collection cover 111. The dust collection cover 111 can be a housing structure, and the dust collection chamber 101 is defined by the inner wall of this housing structure.

[0113] Step S20: Control the disturbance mechanism to disturb the multi-layer tabs.

[0114] Continuing with Figure 2 and Figure 3 the cooperation structure between the multi-layer tabs 210 and the disturbance mechanism 120 in to make a specific description.

[0115] The meaning of disturbing the multi-layer tabs 210 means that the disturbance mechanism 120 applies a certain force to the multi-layer tabs 210 and then removes the force or changes the direction of the force. The multi-layer tabs 210 are disturbed under this force, causing the multi-layer tabs 210 to shake, vibrate or sway. The original state of the multi-layer tabs 210 changes, and thus at least a part of the contaminated particles in the interlayer gaps of the multi-layer tabs 210 are ejected outside the multi-layer tabs 210 along with the shaking, vibration or swaying of the multi-layer tabs 210. And when the multi-layer tabs 210 shake, vibrate or sway, the size of the interlayer gaps of the multi-layer tabs 210 also changes.

[0116] According to the connection state of the multi-layer tabs 210 on the main body part 220, the multi-layer tabs 210 are actually multiple stacked cantilever structures relative to the main body part 220, and the multi-layer tabs 210 are made of metal materials such as copper and aluminum, which have a certain elastic deformation ability. Therefore, when the multi-layer tabs 210 are disturbed, the multi-layer tabs 210 can shake, vibrate or sway relative to the main body part 220.

[0117] In short, disturbing the multi-layer tabs 210 actually means putting the multi-layer tabs 210 in a non-static state such as jitter, vibration or shaking. This state can be defined as the disturbed state of the multi-layer tabs 210. The opposite of the disturbed state is the static state of the multi-layer tabs 210. That is, the process of disturbing the multi-layer tabs 210 is actually a non-static process in which the multi-layer tabs 210 are jittering or shaking.

[0118] When the multi-layer tabs 210 are in the disturbed state, since the pollution particles in the interlayer gap are sandwiched between the tabs 210 of adjacent layers, with the jitter, vibration or shaking of the multi-layer tabs 210, the pollution particles sandwiched between the tabs 210 of adjacent layers are repeatedly rubbed and squeezed, which can cause the pollution particles to move relative to the tabs 210. Therefore, with the jitter or vibration of the multi-layer tabs, the pollution particles gradually move from between the tabs 210 of adjacent layers to the outside of the multi-layer tabs 210. The process of the pollution particles moving from between the tabs 210 of adjacent layers to the outside of the multi-layer tabs 210 can be defined as the ejection of the pollution particles.

[0119] It can be understood that in the method of the embodiment of the present application, the multi-layer tabs 210 are disturbed by the disturbing mechanism 120. The disturbing mechanism 120 can be implemented in various forms to disturb the multi-layer tabs 210. For example, the disturbing mechanism 120 can directly physically contact the multi-layer tabs 210 to directly apply a force to the multi-layer tabs 210. The disturbing mechanism 120 can also not physically contact the multi-layer tabs 210, but indirectly act on the multi-layer tabs 210 through energy forms such as sound waves, so that the multi-layer tabs 210 are disturbed.

[0120] Continuing with Figure 2 and Figure 3 as an example to illustrate the disturbing mechanism 120. As a component for disturbing the multi-layer tabs 210, at least a part of the disturbing mechanism 120 can disturb the multi-layer tabs 210 through two-dimensional motion or three-dimensional motion. Exemplarily, at least a part of the disturbing mechanism 120 is disposed in the dust collection chamber 101 to facilitate disturbing the multi-layer tabs 210 in the dust collection chamber 101. Of course, the method of the embodiment of the present application does not exclude the case where the disturbing mechanism 120 is located outside the dust collection chamber 101 and disturbs the multi-layer tabs 210 in the dust collection chamber 101 by moving the disturbing mechanism 120 from outside the dust collection chamber 101 to inside the dust collection chamber 101.

[0121] Please refer to Figure 4 , Figure 4 which shows one of the schematic diagrams of the process of the disturbing mechanism 120 disturbing the multi-layer tabs 210. It should be noted that Figure 4FIG. 0 is merely a schematic diagram of the disturbing mechanism 120 disturbing the multi-layer tabs 210, aiming to show the general process of the tabs 210 being disturbed, rather than being used to limit the specific form of the multi-layer tabs 210 being disturbed. Specifically, Figure 4 In FIG. Figure 4 , before the disturbing mechanism 120 disturbs the multi-layer tabs 210, the disturbing mechanism 120 and the multi-layer tabs 210 are in a separated state from each other. By moving the disturbing mechanism 120 closer to the multi-layer tabs 210 and squeezing the multi-layer tabs 210, the multi-layer tabs 210 are deformed. Then the disturbing mechanism 120 moves away from the multi-layer tabs 210 to remove the squeezing force on the multi-layer tabs 210. The multi-layer tabs 210 recover from the deformation and generate jitters, vibrations or shakes until the multi-layer tabs 210 gradually stop moving. This process is the general disturbing process of the multi-layer tabs 210.

[0122] Step S30: Control the dust collection chamber of the dust removal mechanism to form a negative pressure.

[0123] When the dust collection chamber 101 forms a negative pressure, a pressure difference can be formed between the inside and the outside of the dust collection chamber 101. Under the action of this pressure difference, the polluted particles inside the dust collection chamber 101 are carried away.

[0124] It can be seen that in the dust removal method provided by the embodiment of the present application, the multi-layer tabs 210 are arranged in the dust collection chamber 101 of the dust removal mechanism 110. The dust collection chamber 101 can cover the multi-layer tabs 210 therein. By forming a negative pressure in the dust collection chamber 101, the removal of polluted particles is realized. Controlling the disturbing mechanism 120 to disturb the multi-layer tabs 210 can make the multi-layer tabs 210 generate jitters, vibrations or shakes. On the one hand, when the multi-layer tabs 210 jitter, vibrate or shake, at least part of the polluted particles between adjacent layers of the tabs 210 can be ejected. On the other hand, the jitters, vibrations or shakes of the multi-layer tabs 210 can also change the inter-layer gap between adjacent layers of the tabs 210. After the inter-layer gap increases, it is more convenient to remove the polluted particles in the inter-layer gap.

[0125] It should be noted that step S30 can be carried out before step S20, during step S20, or simultaneously with step S20. That is, the dust collection chamber 101 of the dust removal mechanism 110 can be first controlled to form a negative pressure, and then the disturbance mechanism 120 can be controlled to disturb the tab 210 when the dust collection chamber 101 is in a negative pressure state; or the dust collection chamber 101 of the dust removal mechanism 110 can be controlled to form a negative pressure during the process of the disturbance mechanism 120 disturbing the tab 210; or the dust collection chamber 101 of the dust removal mechanism 110 can be controlled to form a negative pressure while the disturbance mechanism 120 disturbs the tab 210. It can be understood that the embodiment of the present application is to better remove the contaminated particles in the interlayer gap of the multi-layer tab 210 during the disturbance process of the multi-layer tab 210. Therefore, during the disturbance process of the multi-layer tab 210, the dust collection chamber 101 of the dust removal mechanism 110 should be in a negative pressure state. Therefore, step S30 is carried out at least during step S20.

[0126] Furthermore, it should be noted that in the method of the embodiment of the present application, the disturbance mechanism 120 is used to disturb the multi-layer tab 210, and the dust removal mechanism 110 is used to remove dust from the multi-layer tab 210 by forming a negative pressure in the dust collection chamber 101. The disturbance mechanism 120 and the dust removal mechanism 110 can be two independent structures without a connection relationship, or two structures with a connection relationship. One of the disturbance mechanism 120 and the dust removal mechanism 110 can be used as the installation and support component of the other.

[0127] Please refer to Figure 5 , Figure 5 which is a schematic flowchart of the second embodiment of the dust removal method provided by the present application. Specifically, the dust removal method may include the following steps:

[0128] Step S10: Place the multi-layer tab in the dust collection chamber of the dust removal mechanism.

[0129] Step S210A: Along the stacking direction of the multi-layer tab, control the disturbance mechanism to tap the multi-layer tab at least once from one side of the multi-layer tab.

[0130] Step S30: Control the dust collection chamber of the dust removal mechanism to form a negative pressure.

[0131] Among them, steps S10 and S30 are the same as those in the foregoing embodiments and will not be elaborated here.

[0132] Among them, step S210A is a specific refinement of step S20 in the Figure 1 shown method. The embodiment of the present application elaborates how the disturbance mechanism 120 disturbs the multi-layer tab 210 through step S210A.

[0133] The meaning of controlling the disturbing mechanism 120 to strike the multi-layer tab 210 at least once from one side of the multi-layer tab 210 is that the disturbing mechanism 120 moves and acts on the multi-layer tab 210 on one of its sides. For example, along the stacking direction of the multi-layer tab 210, the disturbing mechanism 120 first moves closer to the multi-layer tab 210, contacts the multi-layer and applies a force to the multi-layer tab 210, and then moves away from the multi-layer tab 210. This process is defined as one strike, so that the multi-layer tab 210 is disturbed. The disturbing mechanism 120 can strike once or strike repeatedly to further enhance the disturbing effect on the multi-layer tab 210, thereby enhancing the dust removal effect on the contaminant particles in the interlayer gap of the multi-layer tab 210.

[0134] The disturbing mechanism 120 striking the multi-layer tab 210 can make the multi-layer tab 210 have various disturbing states: for example, it can make the multi-layer tab 210 in a state of small-amplitude repeated jitter or vibration, and can also make the multi-layer tab 210 in a state of large-amplitude repeated shaking. The amplitude of the jitter or shaking of the multi-layer tab 210 is related to the amplitude of the deformation of the multi-layer tab 210 caused by the disturbing mechanism 120 acting on the multi-layer tab 210. For example, when the disturbing mechanism 120 squeezes the multi-layer tab 210 so that the end of the multi-layer tab 210 moves a first distance, after the disturbing mechanism 120 removes the squeezing on the multi-layer tab 210, the multi-layer tab 210 restores its deformation and undergoes small-amplitude repeated jitter; when the disturbing mechanism 120 squeezes the multi-layer tab 210 so that the end of the multi-layer tab 210 moves a second distance, and the second distance is greater than the first distance, after the disturbing mechanism 120 removes the squeezing on the multi-layer tab 210, the multi-layer tab 210 restores its deformation and undergoes large-amplitude repeated jitter.

[0135] Among them, the end of the tab 210 refers to the end of the tab 210 far from the main body 220 (which can also be called the free end of the tab 210). Correspondingly, the tab 210 also has a root, and the root of the tab 210 refers to the end of the tab 210 connected to the main body 220.

[0136] The specific principle analysis of the disturbing mechanism 120 striking the multi-layer tab 210 from one side to make the multi-layer tab 210 in a disturbed state is as follows:

[0137] Take Figure 4 the disturbing process of the multi-layer tab 210 shown as an example for specific description.

[0138] The disturbing mechanism 120 can first move along a first motion trajectory closer to the multi-layer tabs 210 until the disturbing mechanism 120 abuts against and squeezes the multi-layer tabs 210, causing the multi-layer tabs 210 to undergo elastic bending deformation. Then, the disturbing mechanism 120 moves along a second motion trajectory away from the multi-layer tabs 210 to withdraw the extrusion on the multi-layer tabs 210. After the multi-layer tabs 210 lose the extrusion of the disturbing mechanism 120, the multi-layer tabs 210 will recover from the deformation. At the same time, since the multi-layer tabs 210 are multiple sheet-like cantilever structures, the multi-layer tabs 210 will not immediately change from the bent state to the straight state, but will vibrate repeatedly. After the free end of the tabs 210 vibrates multiple times, the vibration amplitude gradually decreases until the tabs 210 are stationary. That is, the whole process from the start of deformation to the gradual restoration of rest of the multi-layer tabs 210 is the disturbed state of the tabs 210. Exemplarily, the first motion trajectory is parallel to the stacking direction of the multi-layer tabs 210 or has a component parallel to the stacking direction of the multi-layer tabs 210. Along the first motion trajectory, the disturbing mechanism 120 moves from a position separated from the multi-layer tabs 210 to a position where the multi-layer tabs 210 are squeezed. The second motion trajectory can also be parallel to the stacking direction of the multi-layer tabs 210 or have a component parallel to the stacking direction of the multi-layer tabs 210. Along the second motion trajectory, the disturbing mechanism 120 moves from the position where the multi-layer tabs 210 are squeezed to a position separated from the multi-layer tabs 210.

[0139] It can be understood that the first motion trajectory and the second motion trajectory can be various. As long as the first motion trajectory can enable the disturbing mechanism 120 to squeeze the multi-layer tabs 210 to cause elastic deformation of the multi-layer tabs 210, similarly, as long as the second motion trajectory can withdraw the extrusion on the multi-layer tabs 210 in the state where the disturbing mechanism 120 squeezes the multi-layer tabs 210 to enable the multi-layer tabs 210 to recover elastic deformation.

[0140] The method of the embodiment of the present application uses the disturbing mechanism 120 to knock the multi-layer tabs 210 from one side of the multi-layer tabs 210 to realize the disturbance of the multi-layer tabs 210. While achieving the disturbance effect on the multi-layer tabs 210, it can also reduce the friction and scratches on the multi-layer tabs 210.

[0141] It should be noted that since the speed at which the multi-layer tabs 210 recover elastic deformation is relatively fast, the withdrawal speed of the disturbing mechanism 120 should be greater than or equal to the speed at which the multi-layer tabs 210 recover elastic deformation, so as to reduce the influence of the disturbing mechanism 120 on the recovery of elastic deformation of the multi-layer tabs 210 during the withdrawal process of the disturbing mechanism 120, that is, to reduce the interference of the disturbing mechanism 120 on the vibration generated by the multi-layer tabs 210 when withdrawing, and try to make the multi-layer tabs 210 in a free state without additional force applied to the multi-layer tabs 210 during the process of recovering elastic deformation and generating vibration.

[0142] Furthermore, in order to reduce the risk of causing the multi-layer pole ear 210 to undergo inelastic bending deformation (irreversible deformation) when the disturbance mechanism 120 squeezes the multi-layer pole ear 210, the amount of bending deformation produced by the multi-layer pole ear 210 when the disturbance mechanism 120 squeezes the multi-layer pole ear 210 should be no greater than the limit deformation of the elastic bending of the multi-layer pole ear 210, so that the multi-layer pole ear 210 can still be in a straight state after recovering from the deformation, thereby facilitating the maintenance of stable performance of the multi-layer pole ear 210.

[0143] Exemplarily, when the pole tab 210 is made of copper, the limit deformation of the elastic bending of the multi-layer pole tab 210 is set to a first limit deformation, then the disturbance mechanism 120 extrude the multi-layer pole tab 210 so that the bending deformation of the multi-layer pole tab 210 should not be greater than the first limit deformation; when the pole tab 210 is made of aluminum, the limit deformation of the elastic bending of the multi-layer pole tab 210 is set to a second limit deformation, then the disturbance mechanism 120 extrude the multi-layer pole tab 210 so that the bending deformation of the multi-layer pole tab 210 should not be greater than the second limit deformation.

[0144] See also Figure 6 , Figure 6 1 is a flow chart of a third embodiment of the dust removal method provided by the present application. Specifically, the dust removal method may include the following steps:

[0145] Step S10: placing the multi-layer tabs in the dust collecting chamber of the dust removal mechanism.

[0146] Step S210B: along the stacking direction of the multi-layer tab, control the disturbance mechanism to move the multi-layer tab at least once from opposite sides of the multi-layer tab.

[0147] Step S30: controlling the dust collecting chamber of the dust removal mechanism to form a negative pressure.

[0148] Among them, step S10 and step S30 are the same as those in the above-mentioned embodiment and will not be described in detail here.

[0149] Among them, step S210B is to Figure 1 The specific refinement of step S20 in the method shown, the embodiment of the present application illustrates how the disturbance mechanism 120 disturbs the multi-layer tab 210 through step S210B.

[0150] The meaning that the disturbing mechanism 120 deflects the multi-layer tab 210 at least once from opposite sides of the multi-layer tab 210 is that the disturbing mechanism 120 moves close to the multi-layer tab 210 from one side of the multi-layer tab 210 and acts on the multi-layer tab 210, contacts the multi-layer tab 210 and applies a force to the multi-layer tab 210. The disturbing mechanism 120 continues to move until it disengages from the multi-layer tab 210 and reaches the other side of the multi-layer tab 210. This process is defined as one deflection, so that the multi-layer tab 210 is disturbed. The disturbing mechanism 120 can deflect once or deflect repeatedly (back and forth) to further enhance the disturbing effect on the multi-layer tab 210, thereby enhancing the dust removal effect on the contaminant particles in the interlayer gap of the multi-layer tab 210.

[0151] The specific principle analysis of the disturbing mechanism 120 deflecting the multi-layer tab 210 at least once from both sides of the multi-layer tab 210 so that the multi-layer tab 210 is in a disturbed state is as follows:

[0152] The disturbing mechanism 120 can move close to the multi-layer tab 210 along the third movement trajectory until the disturbing mechanism 120 abuts against the multi-layer tab 210 and squeezes the multi-layer tab 210, causing the multi-layer tab 210 to undergo elastic bending deformation. The disturbing mechanism 120 continues to move along the third movement trajectory, causing the disturbing mechanism 120 to gradually disengage from the multi-layer tab 210. The part of the disturbing mechanism 120 used to squeeze the multi-layer tab 210 reaches the other side of the multi-layer tab 210. This process is defined as one deflection.

[0153] It can be understood that in this way, the part of the disturbing mechanism 120 abutting against the multi-layer tab 210 should be as close as possible to the end of the tab 210 so that the disturbing mechanism 120 can smoothly disengage from the multi-layer tab 210 after the multi-layer tab 210 undergoes elastic bending deformation.

[0154] And it can be understood that the process of the disturbing mechanism 120 gradually disengaging from the multi-layer tab 210 is that the disturbing mechanism 120 disengages from each tab 210 of different layers in turn. Compared with the method of knocking on the multi-layer tab 210, when using the method of deflecting the multi-layer tab 210, during the process of the disturbing mechanism 120 disengaging from each tab 210 of different layers in turn, the tabs 210 of adjacent layers are opened and then closed in turn, which can expose the contaminant particles sandwiched between the tabs 210 of adjacent layers to a large extent, and the removal effect on the contaminant particles will be better. However, when using the deflecting method, during the process of the disturbing mechanism 120 gradually disengaging from the multi-layer tab 210, compared with the knocking method, the risk of friction or scratching on the end of the multi-layer tab 210 may also be greater.

[0155] Similarly to the way of tapping the multi-layer tab 210, in the method of the embodiment of the present application, the third movement trajectory can also be parallel to the stacking direction of the multi-layer tab 210 or have a component parallel to the stacking direction of the multi-layer tab 210, as long as it can realize the extrusion of the multi-layer tab 210 by the perturbation mechanism 120 so that the multi-layer tab 210 generates elastic bending deformation, and after the perturbation mechanism 120 disengages from the multi-layer tab 210, it does not interfere or interferes less with the vibration of the multi-layer tab 210.

[0156] It should be noted that step S210A and step S210B are two different implementation manners for step S20 to control the perturbation mechanism 120 to perturb the multi-layer tab 210. Generally speaking, it is difficult to perform step S210A and step S210B simultaneously. It can be to implement step S20 by choosing one of step S210A and step S210B, or it can be to perform them in sequence or alternately. And step S20 is not limited to these two implementation manners, and can also be other implementation manners. For example, the perturbation mechanism 120 can move close to the multi-layer tab 210 along the stacking direction of the multi-layer tab 210. After extruding the multi-layer tab 210 to make the multi-layer tab 210 generate elastic bending deformation, the perturbation mechanism 120 then moves along the direction perpendicular to the stacking direction of the multi-layer tab 210 (that is, towards the side of the multi-layer tab 210), so that the perturbation mechanism 120 removes the extrusion on the multi-layer tab 210.

[0157] Please refer to Figure 7 , Figure 7 is a schematic diagram of the cooperation structure between the electrode assembly and the perturbation mechanism in the dust removal method provided by the embodiment of the present application. In some embodiments, the perturbation mechanism 120 includes a dust suction channel 1220. As an example, the dust suction channel 1220 has opposite ends, one end is the air inlet end and the other end is the air outlet end. The air inlet end and the air outlet end of the dust suction channel 1220 respectively penetrate through the opposite ends of the perturbation mechanism 120. The air inlet end is communicated with the dust collection chamber 101, and the air outlet end is communicated with the external space of the dust collection chamber 101. Figure 7 (a) to (c) in Figure 7 show various different situations of the dust suction channel 1220 of the perturbation mechanism 120 (

[0158] Please refer to Figure 8 , Figure 8 is Figure 1 a schematic flowchart of an embodiment of step S20 in the shown dust removal method. Specifically, step S20 of the method of this embodiment includes:

[0159] Step S220: Make the dust suction channel generate negative pressure, and remove dust from the multi-layer tab through the dust suction channel.

[0160] Negative pressure is generated in the dust suction channel 1220. Therefore, during the process of the disturbance mechanism 120 disturbing the multi-layer pole ear 210, or after the disturbance mechanism 120 disturbs the multi-layer pole ear 210, the polluted particles in the interlayer gaps of the multi-layer pole ear 210 can be sucked away through the dust suction channel 1220 under the action of the negative pressure in the dust suction channel 1220, thereby achieving dust removal of the multi-layer pole ear 210.

[0161] The method of the embodiment of the present application can remove dust from the multi-layered pole tab 210 by generating negative pressure through the disturbance mechanism 120 itself. Under the premise of removing dust from the multi-layered pole tab 210 through the negative pressure in the dust collecting chamber 101 of the dust removal mechanism 110, the disturbance mechanism 120 itself can also play a certain dust removal effect, further enhancing the dust removal effect on the multi-layered pole tab 210. It can be understood that in the method of this embodiment, the disturbance mechanism 120 itself can generate negative pressure to remove dust from the multi-layered pole tab 210. In other embodiments, the disturbance mechanism 120 itself may not remove dust from the multi-layered pole tab 210, but only play the role of disturbing the multi-layered pole tab 210.

[0162] It should be noted that step S220 can be performed before step S210A or step S210B, or during step S210A or step S210B. That is, negative pressure can be generated in the dust suction channel 1220 first, and the dust suction channel 1220 is in a negative pressure state, and then the disturbance mechanism 120 is controlled to knock the multi-layered pole tab 210 at least once from one side of the multi-layered pole tab 210, or to move the multi-layered pole tab 210 at least once from the opposite sides of the multi-layered pole tab 210, so that the multi-layered pole tab 210 is in a disturbed state; or the disturbance mechanism 120 can be controlled to knock the multi-layered pole tab 210 at least once from one side of the multi-layered pole tab 210, or to move the multi-layered pole tab 210 back and forth from the opposite sides of the multi-layered pole tab 210, so that the multi-layered pole tab 210 is in a disturbed state, and then negative pressure can be generated in the dust suction channel 1220, and the dust suction channel 1220 is in a negative pressure state. It can be understood that the method of the embodiment of the present application is used to remove dust from the multi-layer pole ear 210 in a disturbed state, which makes it easier to remove the polluted particles in the interlayer gaps of the multi-layer pole ear 210. Therefore, it is necessary to make the dust suction channel 1220 in a negative pressure state when the multi-layer pole ear 210 is in a disturbed state, that is, step S220 is performed at least during step S210A or step S210B.

[0163] In some embodiments, in step S220, the negative pressure wind speed of the dust suction channel 1220 is 1-3 m / s. For example, the negative pressure wind speed of the dust suction channel 1220 can be 1 m / s, or 2 m / s, or 3 m / s.

[0164] The negative pressure wind speed of the dust suction channel 1220 is limited within this range, which can slow down the problem of poor absorption effect on pollution particles due to too low negative pressure wind speed of the dust suction channel 1220, and the problem of affecting the disturbance of the multi-layer tabs 210 due to too high negative pressure wind speed of the dust suction channel 1220.

[0165] Further, the negative pressure wind speed of the dust suction channel 1220 can be preferably 1 - 2 m / s. Further limiting the negative pressure wind speed of the dust suction channel 1220 within this better range can achieve a better negative pressure absorption effect on pollution particles while having a smaller impact on the disturbance state of the multi-layer tabs 210.

[0166] In some embodiments, in step S10, the negative pressure wind speed of the dust collection chamber 101 is 15 - 25 m / s. For example, the negative pressure wind speed of the dust collection chamber 101 can be 15 m / s, or 18 m / s, or 20 m / s, or 22 m / s, or 25 m / s.

[0167] Limiting the negative pressure wind speed of the dust collection chamber 101 within this range can slow down the problem of poor absorption effect on pollution particles due to too low negative pressure wind speed of the dust collection chamber 101, and the problem of affecting the disturbance of the multi-layer tabs 210 due to too high negative pressure wind speed of the dust collection chamber 101.

[0168] Moreover, the negative pressure wind speed of the dust suction channel 1220 is lower than that of the dust collection chamber 101. That is, a low negative pressure wind speed is adopted in the dust suction channel 1220 to remove dust from the multi-layer tabs 210. The reason is that since the disturbing mechanism 120 is used to disturb the multi-layer tabs 210, the disturbing mechanism 120 will contact the multi-layer tabs 210 or be relatively close to the multi-layer tabs 210. If a relatively large negative pressure wind speed is adopted in the dust suction channel 1220, it will form an adsorption effect on the multi-layer tabs 210 to a certain extent, thus affecting the amplitude or frequency of the shaking, vibration or swaying of the multi-layer tabs 210, and further affecting the ejection of pollution particles in the inter-layer gap of the multi-layer tabs 210. Therefore, a low negative pressure wind speed is adopted in the dust suction channel 1220 to remove dust from the multi-layer tabs 210.

[0169] Further, the negative pressure wind speed of the dust collection chamber 101 can be preferably 20 - 25 m / s. Further limiting the negative pressure wind speed of the dust collection chamber 101 within this better range can achieve a better negative pressure absorption effect on pollution particles while having a smaller impact on the disturbance state of the multi-layer tabs 210.

[0170] Refer again to Figures 2 to 4 , the dust collection chamber 101 has an inlet 102 and an air outlet 103; the air outlet 103 is connected to the air extraction assembly 112 through a pipeline 113. The inlet 102 is used for inserting the multi-layer tabs 210 into the dust collection chamber 101.

[0171] The air extraction component 112 can be a component capable of achieving negative pressure suction, such as a negative pressure pump or an air extractor fan. The air extraction component 112 sucks the air in the dust collection chamber 101 from the dust collection chamber 101 through the pipeline 113, forming a negative pressure in the dust collection chamber 101. The air in the dust collection chamber 101 together with the pollution particles can be sucked away through the pipeline 113 from the air outlet 103. And since the inlet 102 is connected to the dust collection chamber 101, the air outside the dust collection chamber 101 can also enter the dust collection chamber 101 through the inlet 102. Therefore, the air in the dust collection chamber 101 is flowing and in a negative pressure state.

[0172] The relative positions of the inlet 102 and the air outlet 103 can be various. For example, the inlet 102 and the air outlet 103 can be oppositely arranged, or can be not oppositely arranged. Exemplarily, the dust collection chamber 101 has multiple walls, and the inlet 102 and the air outlet 103 can be respectively arranged on two opposite walls of the dust collection chamber 101, or can be arranged on two adjacent walls of the dust collection chamber 101.

[0173] Please refer to Figure 9 , Figure 9 which is a schematic flowchart of the fourth embodiment of the dust removal method provided by the present application. Specifically, the dust removal method can include the following steps:

[0174] Step S110: Insert the multi-layer tab from the inlet into the dust collection chamber, and set the end of the multi-layer tab at an interval from the air outlet; wherein, along the direction from the root to the end of the multi-layer tab, the distance between the end of the multi-layer tab and the air outlet is 5 - 10 mm.

[0175] Step S20: Control the perturbation mechanism to perturb the multi-layer tab.

[0176] Step S30: Control the dust collection chamber of the dust removal mechanism to form a negative pressure.

[0177] Among them, step S20 and step S30 are the same as those in the previous embodiments, and will not be elaborated here too much.

[0178] Among them, step S110 is a specific refinement of step S10 in the Figure 1 method shown. The embodiment of the present application elaborates how the multi-layer tab 210 is arranged in the dust collection chamber 101 of the dust removal mechanism 110 through step S110.

[0179] In the method of this embodiment, after the multi-layer tab 210 is inserted into the dust collection chamber 101 from the inlet 102, the end of the multi-layer tab 210 is set at an interval from the air outlet 103, which can reduce the interference when the air outlet 103 perturbs the multi-layer tab 210.

[0180] In this embodiment, the distance between the end of the multi-layer tab 210 and the air outlet 103 is limited within the range of 5 to 10 mm, which can reduce the risk that the end of the multi-layer tab 210 is easily scratched due to too small a distance between the end of the multi-layer tab 210 and the air outlet 103, and can also reduce the risk that pollution particles are difficult to discharge from the air outlet 103 due to too large a distance between the end of the multi-layer tab 210 and the air outlet 103.

[0181] Exemplarily, the distance between the end of the multi-layer tab 210 and the air outlet 103 is 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm.

[0182] Furthermore, the distance between the end of the multi-layer tab 210 and the air outlet 103 is 6 to 8 mm. Exemplarily, the distance between the end of the multi-layer tab 210 and the air outlet 103 is 6 mm, 7 mm or 8 mm.

[0183] The meaning of the distance between the end of the above-mentioned multi-layer tab 210 and the air outlet 103 refers to the straight-line distance between the end of the multi-layer tab 210 and the air outlet 103. Exemplarily, when the end of the multi-layer tab 210 and the air outlet 103 are oppositely arranged, the connection line between the end of the multi-layer tab 210 and the air outlet 103 is parallel to the direction from the root to the end of the multi-layer tab 210; when the end of the multi-layer tab 210 and the air outlet 103 are not oppositely arranged, for example, when the inlet 102 is arranged on a side wall of the dust collection cover 111 and the air outlet 103 is arranged on the bottom wall of the dust collection cover 111, after the multi-layer tab 210 is inserted into the dust collection cavity 101 through the inlet 102, the connection line between the end of the multi-layer tab 210 and the air outlet 103 intersects with the direction from the root to the end of the multi-layer tab 210.

[0184] In some embodiments, please refer to Figure 10 , Figure 10 which is another schematic diagram of the relative position relationship between the electrode assembly, the dust collection mechanism and the disturbance mechanism in the dust removal method provided by the present application. Along the direction from the root to the end of the multi-layer tab 210, the inlet 102 and the air outlet 103 are oppositely arranged.

[0185] Please refer to Figure 11 , Figure 11 which is a schematic flowchart of the fifth embodiment of the dust removal method provided by the present application. Specifically, the dust removal method may include the following steps:

[0186] Step S110A: Insert the multi-layer tab into the dust collection cavity from the inlet along the direction from the root to the end of the multi-layer tab.

[0187] Step S20: Control the disturbance mechanism to disturb the multi-layer tab.

[0188] Step S30: Control the dust collection chamber of the dust removal mechanism to form a negative pressure.

[0189] Among them, Step S20 and Step S30 are the same as those in the foregoing embodiments, and will not be elaborated here too much.

[0190] Among them, Step S110A is a specific refinement of Step S110 in the Figure 9 shown dust removal method. In the embodiment of the present application, Step S110A is used to elaborate in detail how the multi-layer tabs 210 are inserted into the dust collection chamber 101 from the inlet 102.

[0191] In the method of the embodiment of the present application, the multi-layer tabs 210 are inserted into the dust collection chamber 101 from the inlet 102 along the direction from the root to the end of the multi-layer tabs 210. Since the inlet 102 and the air outlet 103 are oppositely arranged, after the multi-layer tabs 210 are inserted into the dust collection chamber 101, the end of the multi-layer tabs 210 is exactly opposite to the air outlet 103, which is convenient for the interlayer pollution particles of the multi-layer tabs 210 to be sucked away through the air outlet 103.

[0192] In some embodiments, referring again to Figures 2 to 4 , the direction from the root to the end of the multi-layer tabs 210 is defined as the first direction X, the stacking direction of the multi-layer tabs 210 is defined as the second direction Y, and the third direction Z is defined to intersect both the first direction X and the second direction Y. Exemplarily, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs.

[0193] Along the first direction X, the dust collection chamber 101 has opposite first side wall 111A and third side wall 111C; along the third direction Z, the dust collection chamber 101 has opposite second side wall 111B and fourth side wall 111D.

[0194] The first side wall 111A has an air outlet 103, the second side wall 111B has an inlet 102, the fourth side wall 111D has an outlet 105, and the third side wall 111C has an avoidance port 104 connecting the inlet 102 and the outlet 105.

[0195] Please refer to Figure 12 , Figure 12 which is a schematic flow chart of the sixth embodiment of the dust removal method provided by the present application. Specifically, the dust removal method may include the following steps:

[0196] Step S110B: Insert the multi-layer tabs into the dust collection chamber along the third direction.

[0197] Step S20: Control the perturbation mechanism to perturb the multi-layer tabs.

[0198] Step S30: Control the dust collection chamber of the dust removal mechanism to form a negative pressure.

[0199] Among them, steps S20 and S30 are the same as those in the foregoing embodiments and will not be elaborated here.

[0200] Among them, step S110B is a specific refinement of step 110 in the Figure 9 shown dust removal method. In the embodiment of the present application, step S110B is used to elaborate in detail how the multi-layer tab 210 is inserted into the dust collection chamber 101 from the inlet 102.

[0201] Along the third direction Z, the multi-layer tab 210 gradually passes through the inlet 102 and then is inserted into the dust collection chamber 101. During the process of inserting the multi-layer tab 210 into the dust collection chamber 101, the avoidance port 104 avoids the multi-layer tab 210, reducing the interference with the multi-layer tab 210.

[0202] The dust removal method of the embodiment of the present application further includes:

[0203] Step S40: After the dust removal is completed, the multi-layer tab is moved out of the dust collection chamber along the third direction.

[0204] In step S40, after the dust removal is completed, the multi-layer tab 210 is moved out of the dust collection chamber 101 from the outlet 105, facilitating the insertion of the multi-layer tab 210 of the next electrode assembly 200 into the dust collection chamber 101 for dust removal.

[0205] Moreover, when the multi-layer tab 210 is inserted into the dust collection chamber 101 through the inlet 102 and when the multi-layer tab 210 is moved out of the dust collection chamber 101 from the outlet 105, the multi-layer tab 210 moves along the third direction Z, facilitating the transmission of the electrode assembly 200. Exemplarily, the electrode assembly 200 can be placed on a transmission mechanism (such as a conveyor belt) for transmission.

[0206] Please refer to Figure 13 , Figure 13 , which is a schematic structural diagram of the cooperation between the electrode assembly and the transmission mechanism in the dust removal method provided by the embodiment of the present application. The electrode assembly 200 is placed on the transmission mechanism 300 for transmission. The transmission mechanism 300 linearly transmits the electrode assembly 200, and the transmission direction of the transmission mechanism 300 is the third direction Z.

[0207] Moreover, a plurality of electrode assemblies 200 can be placed on the transmission mechanism 300 at intervals along the transmission direction of the transmission mechanism 300. The multi-layer tabs 210 of each electrode assembly 200 enter the dust collection chamber 101 in sequence for dust removal of the multi-layer tabs 210 and then move out of the dust collection chamber 101. Thus, an assembly line operation for dust removal of the multi-layer tabs 210 of a plurality of electrode assemblies 200 can be realized.

[0208] It can be understood that the electrode assembly 200 is placed on the transmission mechanism 300 for transmission. Since the multi-layer tab 210 of the electrode assembly 200 needs to be squeezed by the perturbation mechanism 120 to cause elastic bending of the multi-layer tab 210, the main body 220 of the electrode assembly 200 should be in a fixed state on the transmission mechanism 300 to maintain the relative fixed state between the main body 220 of the electrode assembly 200 and the dust collection cover 111. Exemplarily, a fixing member for fixing the main body 220 of the electrode assembly 200 can be provided on the transmission mechanism 300, so that the main body 220 of the electrode assembly 200 is fixed at the fixing member, and the multi-layer tab 210 of the electrode assembly 200 can be perturbed by the perturbation mechanism 120.

[0209] It should be noted that step S110A and step S110B are two different implementation manners of inserting the multi-layer tab 210 into the dust collection cavity 101 in step S110, and either step S110A or step S110B can be selected to implement step S110.

[0210] In some embodiments, referring again to Figures 2 to 4 , along the stacking direction of the multi-layer tab 210, the dust collection cavity 101 has opposite top wall 111E and bottom wall 111F. The top wall 111E has a through hole 106. The perturbation mechanism 120 includes a driving member 121 and a perturbation member 122. The driving member 121 is disposed outside the dust collection cavity 101. One end of the perturbation member 122 is disposed inside the dust collection cavity 101, and the other end extends from the through hole 106 to the outside of the dust collection cavity 101 and is connected to the driving member 121; wherein, the driving member 121 is used to drive the perturbation member 122 to move, thereby perturbing the multi-layer tab 210.

[0211] Among them, the perturbation mechanism 120 includes a driving member 121 and a perturbation member 122. The driving member 121 serves as a power source, and the perturbation member 122 serves as an implementing member. The driving member 121 can drive the perturbation member 122 to move to perturb the multi-layer tab 210. Disposing the driving member 121 outside the dust collection cavity 101 can reduce the influence of the pollution particles in the dust collection cavity 101 on the driving member 121, and also alleviate the problem that the size of the dust collection cavity 101 needs to be set relatively large due to the driving member 121 being disposed inside the dust collection cavity 101. Since the multi-layer tab 210 is located inside the dust collection cavity 101, one end of the perturbation member 122 needs to be located inside the dust collection cavity 101 to perturb the multi-layer tab 210 inside the dust collection cavity 101, and the other end of the perturbation member 122 needs to be located outside the dust collection cavity 101 to connect to the driving member 121.

[0212] The driving member 121 may include, but is not limited to, driving members 121 of types such as cylinders, hydraulic cylinders, motors, ball screws, etc. The method of the embodiment of the present application does not limit the specific structure of the driving member 121, as long as it can drive the disturbing member 122 so that the disturbing member 122 can abut against and squeeze the multi-layer tabs 210 when moving.

[0213] In some embodiments, the disturbing member 122 includes a disturbing block 1221 and a connecting rod 1222. The disturbing block 1221 is disposed in the dust collection chamber 101 for abutting against the multi-layer tabs 210. One end of the connecting rod 1222 is disposed in the dust collection chamber 101 and connected to the disturbing block 1221, and the other end extends from the through hole 106 to the outside of the dust collection chamber 101 and is connected to the driving member 121.

[0214] Among them, the disturbing block 1221 is a component for abutting against the multi-layer tabs 210, and the connecting rod 1222 is an intermediate connecting member connecting the disturbing block 1221 and the driving member 121. Driven by the driving member 121, the connecting rod 1222 and the disturbing block 1221 move together. The disturbing member 122 is set as two components, and the two components together constitute the disturbing member 122. Among them, the disturbing block 1221 mainly functions to disturb the multi-layer tabs 210, and the connecting rod 1222 mainly functions to connect the disturbing block 1221 to the driving member 121. Therefore, the materials of the disturbing block 1221 and the connecting rod 1222 can be selected respectively to achieve a better disturbing effect of the disturbing block 1221 on the multi-layer tabs 210 and a more stable connecting effect of the connecting rod 1222. For example, the material of the disturbing block 1221 can be set as a softer material, and the material of the connecting rod 1222 can be set as a harder material.

[0215] The disturbing block 1221 and the connecting rod 1222 can be rigidly connected, and there is no relative movement between them. Therefore, when the driving member 121 drives the connecting rod 1222 to move, the disturbing block 1221 can be driven to move together.

[0216] In some embodiments, the disturbing block 1221 is a flexible member, or at least the surface of the disturbing block 1221 for abutting against the multi-layer tabs 210 is coated with a flexible layer. Thus, the risk of scratching the multi-layer tabs 210 by the disturbing block 1221 can be reduced.

[0217] When the disturbing block 1221 is a flexible member, that is, the overall material of the disturbing block 1221 is a flexible material, the manufacturing method of the disturbing block 1221 is simpler; when at least the surface of the disturbing block 1221 for abutting against the multi-layer tabs 210 is coated with a flexible layer, a harder material can be used inside the flexible layer to achieve better disturbance of the multi-layer tabs 210 by the disturbing block 1221.

[0218] In some embodiments, the multi-layer tab 210 has a planar structure, and the surface of the perturbation block 1221 facing the multi-layer tab 210 is inclined with respect to the multi-layer tab 210; along the direction from the root to the end of the multi-layer tab 210, the distance between the surface of the perturbation block 1221 facing the multi-layer tab 210 and the multi-layer tab 210 gradually decreases.

[0219] The surface of the perturbation block 1221 facing the multi-layer tab 210 can be defined as the first surface 1221A. The first surface 1221A is inclined with respect to the multi-layer tab 210 and can adapt to the shape after the multi-layer tab 210 is bent. During the bending deformation of the multi-layer tab 210, the perturbation block 1221 can contact the multi-layer tab 210 through the first surface 1221A as much as possible, increasing the contact area between the perturbation block 1221 and the multi-layer tab 210, and minimizing the local depression deformation defect of the multi-layer tab 210 caused by the extrusion of the edge of the perturbation block 1221 on the multi-layer tab 210 due to large local stress. Especially for tabs 210 made of relatively soft materials such as copper, the extrusion of the edge of the perturbation block 1221 on the multi-layer tab 210 should be minimized.

[0220] In some embodiments, the angle between the surface of the perturbation block 1221 facing the multi-layer tab 210 and the multi-layer tab 210 is 5 to 45 degrees. Exemplarily, the angle between the surface of the perturbation block 1221 facing the multi-layer tab 210 and the multi-layer tab 210 is 5 degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees or 45 degrees.

[0221] That is, the angle between the first surface 1221A and the multi-layer tab 210 is 5 to 45 degrees. Limiting the angle between the surface of the perturbation block 1221 facing the multi-layer tab 210 and the multi-layer tab 210 within this range can reduce the problem that the edge of the perturbation block 1221 is likely to squeeze the multi-layer tab 210 due to too small an angle, and reduce the problem that the contact area between the perturbation block 1221 and the multi-layer tab 210 is too small due to too large an angle.

[0222] Further, the angle between the surface of the perturbation block 1221 facing the multi-layer tab 210 and the multi-layer tab 210 is 20 to 40 degrees. Exemplarily, the angle between the surface of the perturbation block 1221 facing the multi-layer tab 210 and the multi-layer tab 210 is 20 degrees, 25 degrees, 30 degrees, 35 degrees or 40 degrees.

[0223] Furthermore, the angle between the surface of the perturbation block 1221 facing the multi-layer tab 210 and the multi-layer tab 210 is 20 to 30 degrees. Exemplarily, the angle between the surface of the perturbation block 1221 facing the multi-layer tab 210 and the multi-layer tab 210 is 20 degrees, 25 degrees or 30 degrees.

[0224] In some embodiments, along the direction from the root to the end of the multi-layer tab 210, the disturbing block 1221 is connected to the surface of the multi-layer tab 210 towards the side surface of the disturbing block 1221 to form two corners 1221B.

[0225] The side surface of the disturbing block 1221 can be defined as the second surface 1221C, that is, along the direction from the root to the end of the multi-layer tab 210, the first surface 1221A of the disturbing block 1221 is connected to the two second surfaces 1221C to form two corners 1221B.

[0226] Wherein, step S10 further includes:

[0227] Placing the disturbing block between the multi-layer tab and the top wall; along the stacking direction of the multi-layer tab, the projection of one corner on the plane where the multi-layer tab is located is on the multi-layer tab, and the projection of the other corner on the plane where the multi-layer tab is located is outside the multi-layer tab.

[0228] This step is a further limitation on Figure 9 the step S110 shown, that is, in step S110, the multi-layer tab 210 is inserted into the dust collection chamber 101 from the inlet 102, and the end of the multi-layer tab 210 is spaced from the air outlet 103, and the disturbing block 1221 is also located between the multi-layer tab 210 and the top wall 111E. Along the stacking direction of the multi-layer tab 210, the projection of one corner 1221B on the plane where the multi-layer tab 210 is located is on the multi-layer tab 210, and the projection of the other corner 1221B on the plane where the multi-layer tab 210 is located is outside the multi-layer tab 210. In this way, the disturbing block 1221 contacts the multi-layer tab 210 through the first surface 1221A, which can further reduce the risk of the corner 1221B squeezing the multi-layer tab 210.

[0229] In some embodiments, at least the corner 1221B whose projection is on the multi-layer tab 210 has a smooth transition.

[0230] The corner 1221B whose projection is on the multi-layer tab 210 may still have a certain risk of scratching the multi-layer tab 210 to a certain extent. Setting this corner 1221B to have a smooth transition can reduce the risk of this corner 1221B scratching the multi-layer tab 210 to a certain extent.

[0231] Referring again to Figure 7 , one end of the aforementioned dust suction channel 1220 penetrates through the disturbing block 1221, and the other end penetrates through the part of the connecting rod 1222 located outside the dust collection chamber 101. The contaminated particles in the dust collection chamber 101 can enter through the dust suction channel 1220 in the disturbing block 1221 and be discharged outside the dust collection chamber 101 through the dust suction channel 1220 in the connecting rod 1222.

[0232] Figure 7 Figures (a) to (c) show different positions where the dust suction channel 1220 penetrates through the disturbance block 1221, where: Figure 7 Figure (a) shows that the position where the dust suction channel 1220 penetrates through the disturbance block 1221 is at the corner 1221B. Figure 7 Figure (b) shows that the position where the dust suction channel 1220 penetrates through the disturbance block 1221 is at the first surface 1221A. Figure 7 Figure (c) shows that the position where the dust suction channel 1220 penetrates through the disturbance block 1221 is at the second surface 1221C.

[0233] It can be understood that in the embodiments of the present application, the dust suction channel 1220 penetrating through the disturbance block 1221 is used to suck the contaminated particles in the dust collection cavity 101 under negative pressure. The position where the dust suction channel 1220 penetrates through the disturbance block 1221 can also be other situations. For example, it can penetrate through the first surface 1221A, the corner 1221B, and the second surface 1221C at the same time to increase the suction effect on the contaminated particles.

[0234] In some embodiments, along the stacking direction of the multi-layer tabs 210, the ratio of the width of the projection of the surface of the disturbance block 1221 facing the multi-layer tabs 210 on the multi-layer tabs 210 to the width of the multi-layer tabs 210 is 1 / 3 to 2 / 3; wherein, the width of the projection is the dimension of the projection in the direction from the root to the end of the multi-layer tabs 210, and the width of the multi-layer tabs 210 is the dimension of the multi-layer tabs 210 in the direction from the root to the end of the multi-layer tabs 210.

[0235] Limiting the ratio of the width of the projection of the surface of the disturbance block 1221 facing the multi-layer tabs 210 on the multi-layer tabs 210 between 1 / 3 and 2 / 3 can reduce the risk that the disturbance effect of the disturbance block 1221 on the multi-layer tabs 210 is not obvious due to too small a ratio of the width of the projection, and reduce the risk that the multi-layer tabs 210 generate inelastic deformation due to too large a ratio of the width of the projection.

[0236] The present application also provides a dust removal device for removing dust from the multi-layer tabs 210 of the electrode assembly 200. Please refer to Figures 2 to 4 , this dust removal device 100 includes a dust removal mechanism 110 and a disturbance mechanism 120; the dust removal mechanism 110 has a dust collection cavity 101, the dust collection cavity 101 has an inlet 102 and an air outlet 103, the air outlet 103 is connected to an air extraction assembly 112, and the inlet 102 is used for the multi-layer tabs 210 to be inserted into the dust collection cavity 101; the disturbance mechanism 120 is connected to the dust removal mechanism 110, and at least part of the disturbance mechanism 120 is arranged in the dust collection cavity 101, and the disturbance mechanism 120 is used to disturb the multi-layer tabs 210 located in the dust collection cavity 101.

[0237] It can be seen that the dust removal device 100 provided by the embodiments of the present application can remove dust from the multiple layers of tab ears 210 of the electrode assembly 200. In the dust removal device 100, the dust collection chamber 101 of the dust removal mechanism 110 is used for the multiple layers of tab ears 210 to be inserted therein through the inlet 102. The air outlet 103 of the dust collection chamber 101 is used to connect to the air extraction assembly 112, so as to form a negative pressure in the dust collection chamber 101, suck the pollution particles inside the multiple layers of tab ears 210, and thus remove the pollution particles inside the multiple layers of tab ears 210. The perturbation mechanism 120 can perturb the multiple layers of tab ears 210 located in the dust collection chamber 101, so that the multiple layers of tab ears 210 vibrate or shake. On the one hand, when the multiple layers of tab ears 210 vibrate or shake, at least some of the pollution particles between adjacent layers of tab ears 210 can be ejected. On the other hand, the vibration or shaking of the multiple layers of tab ears 210 can also change the interlayer gap between adjacent layers of tab ears 210. After the interlayer gap increases, it is more convenient to remove the pollution particles in the interlayer gap. The dust removal device 100 provided by the embodiments of the present application can reduce the residual pollution particles between the layers of the multiple layers of tab ears 210, and further reduce the residual pollution particles inside the tab ear part formed by welding the multiple layers of tab ears 210 together, thereby improving the quality of the electrode assembly 200, and improving the stability and service life of the electrode assembly 200.

[0238] Among them, the meaning and specific manner of perturbing the multiple layers of tab ears 210 are as described in the above explanation, and will not be elaborated here.

[0239] In some embodiments, along the first direction X, the dust collection chamber 101 has opposite first side walls 111A and third side walls 111C; along the second direction Y, the dust collection chamber 101 has opposite top walls 111E and bottom walls 111F; along the third direction Z, the dust collection chamber 101 has opposite second side walls 111B and fourth side walls 111D; wherein, the first direction X, the second direction Y and the third direction Z intersect pairwise; the first side wall 111A has an air outlet 103, the second side wall 111B has an inlet 102, the fourth side wall 111D has an outlet 105, and the third side wall 111C has an avoidance opening 104 communicating the inlet 102 and the outlet 105; the outlet 105 is used for the multiple layers of tab ears 210 to move out of the dust collection chamber 101.

[0240] Along the third direction Z, the multiple layers of tab ears 210 are gradually inserted into the dust collection chamber 101 through the inlet 102. During the process of inserting the multiple layers of tab ears 210 into the dust collection chamber 101, the avoidance opening 104 can avoid the multiple layers of tab ears 210 and reduce the interference with the multiple layers of tab ears 210.

[0241] After the dust removal is completed, the multiple layers of tab ears 210 move out of the dust collection chamber 101 from the outlet 105, which is convenient for inserting the multiple layers of tab ears 210 of the next electrode assembly 200 into the dust collection chamber 101 for dust removal.

[0242] After the multi-layer tabs 210 are inserted into the dust collection chamber 101 through the inlet 102, along the direction from the root to the end of the multi-layer tabs 210, the end of the multi-layer tabs 210 is exactly opposite to the air outlet 103, facilitating the extraction of the inter-layer contamination particles of the multi-layer tabs 210 through the air outlet 103.

[0243] Herein, the root of the tab 210 refers to the end where the tab 210 is connected to the main body 220, and the end of the tab 210 refers to the end away from the main body 220 (which can also be referred to as the free end of the tab 210).

[0244] In addition, when the multi-layer tabs 210 are inserted into the dust collection chamber 101 through the inlet 102 and when the multi-layer tabs 210 are removed from the dust collection chamber 101 through the outlet 105, the multi-layer tabs 210 all move along the third direction Z, facilitating the transmission of the electrode assembly 200. Exemplarily, the electrode assembly 200 can be placed on a transmission mechanism (such as a conveyor belt) for transmission.

[0245] The electrode assembly 200 is placed on the transmission mechanism 300 for transmission. The transmission mechanism 300 linearly transmits the electrode assembly 200, and the transmission direction of the transmission mechanism 300 is the third direction Z.

[0246] Moreover, multiple electrode assemblies 200 can be placed on the transmission mechanism 300 at intervals along the transmission direction of the transmission mechanism 300. The multi-layer tabs 210 of each electrode assembly 200 enter the dust collection chamber 101 in sequence for dust removal of the multi-layer tabs 210 and then are removed from the dust collection chamber 101, thereby realizing the assembly line operation of dust removal of the multi-layer tabs 210 of multiple electrode assemblies 200.

[0247] It can be understood that since the electrode assembly 200 is placed on the transmission mechanism 300 for transmission and the multi-layer tabs 210 of the electrode assembly 200 need to be squeezed by the perturbation mechanism 120 to make the multi-layer tabs 210 elastically bend, the main body 220 of the electrode assembly 200 should be in a fixed state on the transmission mechanism 300 to maintain the relative fixed state between the main body 220 of the electrode assembly 200 and the dust collection cover 111. Exemplarily, a fixing member for fixing the main body 220 of the electrode assembly 200 can be provided on the transmission mechanism 300 so that the main body 220 of the electrode assembly 200 is fixed at the fixing member, and the multi-layer tabs 210 of the electrode assembly 200 can be perturbed by the perturbation mechanism 120.

[0248] In some embodiments, along the first direction X, the distance between the inlet 102 and the first side wall 111A is 4 to 9 mm, and the distance between the outlet 105 and the first side wall 111A is 4 to 9 mm. After the multi-layer tab 210 is inserted into the dust collection chamber 101, a suitable spacing should be maintained between the end of the multi-layer tab 210 and the first side wall 111A. Since the multi-layer tab 210 is inserted into the dust collection chamber 101 through the inlet 102 along the third direction Z and removed from the dust collection chamber 101 through the outlet 105 along the third direction Z, along the first direction X, the distance between the inlet 102 and the first side wall 111A can be slightly smaller than the spacing between the end of the multi-layer tab 210 and the first side wall 111A. Limiting the distance between the inlet 102 and the first side wall 111A and the distance between the outlet 105 and the first side wall 111A within the range of 4 to 9 mm can enable a suitable distance to be maintained between the end of the multi-layer tab 210 and the first side wall 111A, reducing the risk that the end of the multi-layer tab 210 is easily scratched by the first side wall 111A due to too small a distance between the end of the multi-layer tab 210 and the first side wall 111A, and reducing the risk that it is difficult for pollution particles to be discharged from the air outlet 103 due to too large a distance between the end of the multi-layer tab 210 and the first side wall 111A.

[0249] Exemplarily, after the multi-layer tab 210 is inserted into the dust collection chamber 101 through the inlet 102 along the third direction Z, along the direction from the root to the end of the multi-layer tab 210, the spacing between the end of the multi-layer tab 210 and the air outlet 103 can be 5 to 10 mm.

[0250] In this embodiment, the multi-layer tab 210 is inserted into the dust collection chamber 101 through the inlet 102, and the end of the multi-layer tab 210 is spaced from the air outlet 103, which can reduce the interference when the air outlet 103 disturbs the multi-layer tab 210.

[0251] In this embodiment, limiting the distance between the inlet 102 and the first side wall 111A and the distance between the outlet 105 and the first side wall 111A within the range of 4 to 9 mm can enable the spacing between the end of the multi-layer tab 210 and the air outlet 103 to be generally limited within the range of 5 to 10 mm, reducing the risk that the end of the multi-layer tab 210 is easily scratched due to too small a spacing between the end of the multi-layer tab 210 and the air outlet 103, and reducing the risk that it is difficult for pollution particles to be discharged from the air outlet 103 due to too large a spacing between the end of the multi-layer tab 210 and the air outlet 103.

[0252] Exemplarily, along the first direction X, the distance between the inlet 102 and the first side wall 111A is 4 mm, 5 mm, 6 mm, 7 mm, 8 mm or 9 mm, and the distance between the outlet 105 and the first side wall 111A is 4 mm, 5 mm, 6 mm, 7 mm, 8 mm or 9 mm.

[0253] Further, along the first direction X, the distance between the inlet 102 and the first side wall 111A is 5-7 mm, and the distance between the outlet 105 and the first side wall 111A is 5-7 mm. Exemplarily, along the first direction X, the distance between the inlet 102 and the first side wall 111A is 5 mm, 6 mm or 7 mm, and the distance between the outlet 105 and the first side wall 111A is 5 mm, 6 mm or 7 mm.

[0254] In some embodiments, the disturbing mechanism 120 has a first surface 1221A located in the dust collection chamber 101 and facing away from the top wall 111E, and the first surface 1221A is inclined relative to the first direction X; along the direction from the third side wall 111C to the first side wall 111A, the distance between the first surface 1221A and the bottom wall 111F gradually decreases; the bottom wall 111F is parallel to the first direction X.

[0255] The first surface 1221A of the disturbing mechanism 120 is inclined relative to the first direction X. Therefore, after the multi-layer tab 210 is inserted into the dust collection chamber 101, the first surface 1221A of the disturbing mechanism 120 is also inclined relative to the multi-layer tab 210. The disturbing mechanism 120 can contact and squeeze the multi-layer tab 210 through the first surface 1221A. The inclined first surface 1221A can better adapt to the shape of the multi-layer tab 210 after bending deformation. During the bending deformation process of the multi-layer tab 210, the disturbing mechanism 120 can contact the multi-layer tab 210 through the first surface 1221A as much as possible, increasing the contact area between the disturbing mechanism 120 and the multi-layer tab 210. At the same time, it can also minimize the local depression deformation defect of the multi-layer tab 210 caused by the extrusion of the edge of the disturbing mechanism 120 on the multi-layer tab 210 due to large local stress.

[0256] In some embodiments, the included angle between the first surface 1221A and the bottom wall 111F is 5-45 degrees. Exemplarily, the included angle between the first surface 1221A and the bottom wall 111F is 5 degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees or 45 degrees.

[0257] Limiting the included angle between the first surface 1221A and the bottom wall 111F within this range, after the multi-layer tab 210 is inserted into the dust collection chamber 101, the included angle between the first surface 1221A and the multi-layer tab 210 is also limited within this range, which can reduce the problem that the edge of the disturbing mechanism 120 is likely to squeeze the multi-layer tab 210 due to too small an included angle, and reduce the problem that the contact area between the disturbing mechanism 120 and the multi-layer tab 210 is too small due to too large an included angle.

[0258] Further, the included angle between the first surface 1221A and the bottom wall 111F is 20 to 40 degrees. Exemplarily, the included angle between the first surface 1221A and the bottom wall 111F is 20 degrees, 25 degrees, 30 degrees, 35 degrees, or 40 degrees.

[0259] Furthermore, the included angle between the first surface 1221A and the bottom wall 111F is 20 to 30 degrees. Exemplarily, the included angle between the first surface 1221A and the bottom wall 111F is 20 degrees, 22 degrees, 25 degrees, 28 degrees, or 30 degrees.

[0260] In some embodiments, the disturbing mechanism 120 further has two second surfaces 1221C connected to the first surface 1221A. Along the first direction X, the first surface 1221A and the second surface 1221C are connected to form a corner 1221B, and the corner 1221B has a smooth transition.

[0261] Setting the corner 1221B to have a smooth transition can, to a certain extent, reduce the risk of the corner 1221B scratching the multi-layer tabs 210.

[0262] In some embodiments, the disturbing mechanism 120 includes a dust suction channel 1220.

[0263] As an example, the dust suction channel 1220 has opposite ends, one end is an air inlet end and the other end is an air outlet end. The air inlet end and the air outlet end of the dust suction channel 1220 respectively penetrate through opposite ends of the disturbing mechanism 120. The air inlet end can communicate with the dust collection chamber 101, and the air outlet end can communicate with the external space of the dust collection chamber 101. Figure 7 Figures (a) to (c) show various different situations of the dust suction channel 1220 of the disturbing mechanism 120.

[0264] The disturbing mechanism 120 itself has a dust suction channel 1220. A negative pressure can be generated in the dust suction channel 1220. During the process of the disturbing mechanism 120 disturbing the multi-layer tabs 210, or after the disturbing mechanism 120 disturbs the multi-layer tabs 210, the contaminant particles in the inter-layer gaps of the multi-layer tabs 210 can be sucked away through the dust suction channel 1220, thereby realizing dust removal of the multi-layer tabs 210 and further enhancing the dust removal effect on the multi-layer tabs 210.

[0265] This embodiment can perform dust removal on the multi-layer tabs 210 through the disturbing mechanism 120 itself. On the premise that the negative pressure in the dust collection chamber 101 of the dust removal mechanism 110 performs dust removal on the multi-layer tabs 210, the disturbing mechanism 120 itself can also play a certain dust removal effect, further enhancing the dust removal effect on the multi-layer tabs 210. It can be understood that the disturbing mechanism 120 itself can perform dust removal on the multi-layer tabs 210. In other embodiments, the disturbing mechanism 120 itself may not perform dust removal on the multi-layer tabs 210, but only play the role of disturbing the multi-layer tabs 210.

[0266] In some embodiments, the negative pressure wind speed of the dust suction channel 1220 is 1 to 3 m / s. For example, the negative pressure wind speed of the dust suction channel 1220 can be 1 m / s, or 2 m / s, or 3 m / s.

[0267] Limiting the negative pressure wind speed of the dust suction channel 1220 within this range can mitigate the problem of poor absorption effect on contaminated particles due to too low negative pressure wind speed of the dust suction channel 1220, and the problem of affecting the disturbance of the multi-layer tabs 210 due to too high negative pressure wind speed of the dust suction channel 1220.

[0268] Furthermore, the negative pressure wind speed of the dust suction channel 1220 can preferably be 1 to 2 m / s. Further limiting the negative pressure wind speed of the dust suction channel 1220 within this preferred range can achieve a better negative pressure absorption effect on contaminated particles while having less impact on the disturbance state of the multi-layer tabs 210.

[0269] In some embodiments, the negative pressure wind speed of the dust collection chamber is 15 to 25 m / s. For example, the negative pressure wind speed of the dust collection chamber can be 15 m / s, or 20 m / s, or 25 m / s.

[0270] Limiting the negative pressure wind speed of the dust collection chamber 101 within this range can mitigate the problem of poor absorption effect on contaminated particles due to too low negative pressure wind speed of the dust collection chamber 101, and the problem of affecting the disturbance of the multi-layer tabs 210 due to too high negative pressure wind speed of the dust collection chamber 101.

[0271] Moreover, the negative pressure wind speed of the dust suction channel 1220 is lower than that of the dust collection chamber 101. That is, a low wind speed is used in the dust suction channel 1220 to remove dust from the multi-layer tabs 210. The reason is that since the disturbing mechanism 120 is used to disturb the multi-layer tabs 210, the disturbing mechanism 120 will contact the multi-layer tabs 210 or be relatively close to the multi-layer tabs 210. If a relatively high negative pressure wind speed is used in the dust suction channel 1220, it will form an adsorption effect on the multi-layer tabs 210 to a certain extent, thus affecting the amplitude or frequency of the shaking, vibration or swaying of the multi-layer tabs 210, and further affecting the ejection of contaminated particles in the inter-layer gap of the multi-layer tabs 210. Therefore, a low wind speed is used in the dust suction channel 1220 to remove dust from the multi-layer tabs 210.

[0272] Furthermore, the negative pressure wind speed of the dust collection chamber 101 can preferably be 20 to 25 m / s. Further limiting the negative pressure wind speed of the dust collection chamber 101 within this preferred range can achieve a better negative pressure absorption effect on contaminated particles while having less impact on the disturbance state of the multi-layer tabs 210.

[0273] In some embodiments, the top wall 111E has a through hole 106, and the disturbing mechanism 120 includes a driving member 121 and a disturbing member 122; the driving member 121 is disposed outside the dust collection chamber 101; one end of the disturbing member 122 is disposed inside the dust collection chamber 101, and the other end extends from the through hole 106 to the outside of the dust collection chamber 101 and is connected to the driving member 121; wherein, the driving member 121 is used to drive the disturbing member 122 to move, thereby disturbing the multi-layer tabs 210.

[0274] The disturbing mechanism 120 includes a driving member 121 and a disturbing member 122. The driving member 121 serves as a power source, and the disturbing member 122 serves as an implementing member. The driving member 121 can drive the disturbing member 122 to move to disturb the multi-layer tabs 210. Disposing the driving member 121 outside the dust collection chamber 101 can reduce the influence of the pollution particles in the dust collection chamber 101 on the driving member 121, and also alleviate the problem that the size of the dust collection chamber 101 needs to be set relatively large due to the driving member 121 being disposed inside the dust collection chamber 101. Since the multi-layer tabs 210 are located inside the dust collection chamber 101, one end of the disturbing member 122 needs to be located inside the dust collection chamber 101 to disturb the multi-layer tabs 210 inside the dust collection chamber 101, and the other end of the disturbing member 122 needs to be located outside the dust collection chamber 101 to connect to the driving member 121.

[0275] In some embodiments, the disturbing member 122 includes a disturbing block 1221 and a connecting rod 1222; the disturbing block 1221 is disposed inside the dust collection chamber 101 and is used to abut against the multi-layer tabs 210; one end of the connecting rod 1222 is disposed inside the dust collection chamber 101 and is connected to the disturbing block 1221, and the other end extends from the through hole 106 to the outside of the dust collection chamber 101 and is connected to the driving member 121.

[0276] The disturbing block 1221 serves as a component for abutting against the multi-layer tabs 210, and the connecting rod 1222 serves as an intermediate connecting member for connecting the disturbing block 1221 and the driving member 121. Driven by the driving member 121, the connecting rod 1222 moves together with the disturbing block 1221. The disturbing member 122 is set as two components, and the two components together form the disturbing member 122. Among them, the disturbing block 1221 mainly plays the role of disturbing the multi-layer tabs 210, and the connecting rod 1222 mainly plays the role of connecting the disturbing block 1221 to the driving member 121. Therefore, the materials of the disturbing block 1221 and the connecting rod 1222 can be selected respectively to achieve a better disturbing effect of the disturbing block 1221 on the multi-layer tabs 210 and a more stable connecting effect of the connecting rod 1222.

[0277] In some embodiments, when the disturbing member 122 includes a disturbing block 1221 and a connecting rod 1222, one end of the connecting rod 1222 is disposed in the dust collection chamber 101 and connected to the disturbing block 1221, and the other end extends from the through hole 106 to the outside of the dust collection chamber 101 and is connected to the driving member 121, the disturbing mechanism 120 may include a dust suction channel 1220. One end of the dust suction channel 1220 penetrates through the disturbing block 1221, and the other end penetrates through the portion of the connecting rod 1222 located outside the dust collection chamber 101.

[0278] The disturbing mechanism 120 itself has a dust suction channel 1220. During the process of the disturbing mechanism 120 disturbing the multi-layer tabs 210, or after the disturbing mechanism 120 disturbs the multi-layer tabs 210, the contaminant particles in the inter-layer gap of the multi-layer tabs 210 can be sucked to the outside of the dust collection chamber 101 through the dust suction channel 1220, so as to realize dust removal of the multi-layer tabs 210 and further enhance the dust removal effect on the multi-layer tabs 210.

[0279] Referring again to Figure 7 , Figure 7 , (a) to (c) show different positions where the dust suction channel 1220 penetrates through the disturbing block 1221, where: Figure 7 , (a) shows that the position where the dust suction channel 1220 penetrates through the disturbing block 1221 is at the corner 1221B, Figure 7 , (b) shows that the position where the dust suction channel 1220 penetrates through the disturbing block 1221 is the first surface 1221A, Figure 7 , (c) shows that the position where the dust suction channel 1220 penetrates through the disturbing block 1221 is the second surface 1221C.

[0280] It can be understood that in the embodiments of the present application, the dust suction channel 1220 penetrates through the disturbing block 1221 for negative pressure suction of the contaminant particles in the dust collection chamber 101. The position where the dust suction channel 1220 penetrates through the disturbing block 1221 may also be other situations. For example, it may penetrate through the first surface 1221A, the corner 1221B and the second surface 1221C at the same time to increase the suction effect on the contaminant particles.

[0281] In some embodiments, the disturbing block 1221 is a flexible member, or at least the surface of the disturbing block 1221 for abutting against the multi-layer tabs 210 is coated with a flexible layer. In this way, the risk of scratching the multi-layer tabs 210 by the disturbing block 1221 can be reduced.

[0282] When the disturbing block 1221 is a flexible member, that is, the overall material of the disturbing block 1221 is a flexible material, the manufacturing method of the disturbing block 1221 is simpler; when at least the surface of the disturbing block 1221 for abutting against the multi-layer tabs 210 is coated with a flexible layer, a harder material can be used inside the flexible layer to achieve better disturbance of the multi-layer tabs 210 by the disturbing block 1221.

[0283] An embodiment of the present application further provides a dust removal system for removing dust from the multi-layer tabs 210 of the electrode assembly 200. Referring again to Figure 13 , the dust removal system includes a dust removal device 100, a transmission mechanism 300, and a controller (not shown in the figure). The dust removal device 100 is used to remove dust from the multi-layer tabs 210 of the electrode assembly 200. The specific structure of the dust removal device 100 refers to the above embodiment.

[0284] The transmission mechanism 300 is used to move the electrode assembly 200 so that the multi-layer tabs 210 of the electrode assembly 200 are inserted into the dust collection chamber 101 from the inlet 102.

[0285] The controller is electrically connected to the dust removal mechanism 110 and the perturbation mechanism 120 respectively, and is used to control the perturbation mechanism 120 to perturb the multi-layer tabs 210 located in the dust collection chamber 101, and control the dust removal mechanism 110 to remove dust from the multi-layer tabs 210 after the multi-layer tabs 210 are inserted into the dust collection chamber 101 from the inlet 102.

[0286] In the dust removal system provided by the embodiment of the present application, the dust removal device 100 is used to remove dust from the multi-layer tabs 210 of the electrode assembly 200. In the dust removal device 100, the dust collection chamber 101 of the dust removal mechanism 110 is used for the multi-layer tabs 210 to be inserted therein through the inlet 102, and the air outlet 103 of the dust collection chamber 101 is used to connect to the air extraction assembly 112, so that a negative pressure is formed in the dust collection chamber 101 to suck the pollution particles inside the multi-layer tabs 210, thereby removing the pollution particles inside the multi-layer tabs 210. The perturbation mechanism 120 can perturb the multi-layer tabs 210 located in the dust collection chamber 101, so that the multi-layer tabs 210 vibrate or shake. On the one hand, when the multi-layer tabs 210 vibrate or shake, at least part of the pollution particles between the adjacent layer tabs 210 can be ejected. On the other hand, the vibration or shaking of the multi-layer tabs 210 can also change the interlayer gap between the adjacent layer tabs 210. After the interlayer gap increases, it is more convenient to remove the pollution particles in the interlayer gap, thereby reducing the residual pollution particles inside the tab part formed by welding the multi-layer tabs 210 together, improving the quality of the electrode assembly 200, and improving the stability and service life of the electrode assembly 200; the transmission mechanism 300 is used to transmit the electrode assembly 200, which is convenient for the multi-layer tabs 210 of the electrode assembly 200 to be inserted into the dust collection chamber 101, and is beneficial to improving the automation of the transmission of the electrode assembly 200; the controller controls the perturbation of the multi-layer tabs 210 by the perturbation mechanism 120 and controls the dust removal of the multi-layer tabs 210 by the dust removal mechanism 110, which is beneficial to realizing the automation of the dust removal process.

[0287] The embodiment of the present application further provides a battery production system, including a dust removal device and a welding device. The dust removal device adopts the dust removal device 100 of any of the above solutions. The dust removal device 100 is used to remove dust from the multi-layer tabs 210 of the electrode assembly 200. The welding device is located downstream of the dust removal device 100 and is used to weld the multi-layer tabs 210 of the electrode assembly 200 after dust removal by the dust removal device 100.

[0288] In the battery production system provided by the present application, the dust removal device 100 is used to remove dust from the multi-layer tabs 210 of the electrode assembly 200. In the dust removal device 100, the dust collection chamber 101 of the dust removal mechanism 110 is used for the multi-layer tabs 210 to be inserted therein through the inlet 102. The air outlet 103 of the dust collection chamber 101 is used to connect to the air extraction assembly 112, so that a negative pressure is formed in the dust collection chamber 101 to suck the pollution particles inside the multi-layer tabs 210, thereby removing the pollution particles inside the multi-layer tabs 210. The disturbance mechanism 120 can disturb the multi-layer tabs 210 located in the dust collection chamber 101, so that the multi-layer tabs 210 vibrate or shake. On the one hand, when the multi-layer tabs 210 vibrate or shake, at least part of the pollution particles between the adjacent layer tabs 210 can be ejected. On the other hand, the vibration or shaking of the multi-layer tabs 210 can also change the inter-layer gap between the adjacent layer tabs 210. After the inter-layer gap increases, it is more convenient to remove the pollution particles in the inter-layer gap, thereby reducing the residue of pollution particles in the inter-layer gap of the multi-layer tabs 210. The welding device welds the multi-layer tabs 210 of the electrode assembly 200 after dust removal by the dust removal device 100. The residue of pollution particles inside the integrated tab part formed after welding the multi-layer tabs 210 of the electrode assembly 200 is less, so that the quality of the electrode assembly 200 can be improved, and the stability and service life of the electrode assembly 200 can be improved.

[0289] In the description of the present application, the descriptions referring to terms such as "in one embodiment", "in some embodiments", "in other embodiments", "in still other embodiments", or "exemplary" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine the different embodiments or examples described in the present application and the features of different embodiments or examples.

[0290] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included within the protection scope of the present application.

Claims

1. A dust removal method, characterized in that: The method is used for removing dust from a multi-layer electrode tab before welding the multi-layer electrode tab of an electrode assembly, and the dust removal method comprises: The multi-layer tabs are arranged in a dust collecting chamber of a dust removal mechanism; Controlling the disturbance mechanism to disturb the multi-layered tabs to eject contamination particles between the tabs of adjacent layers and / or to change the interlayer gaps between the tabs of adjacent layers; The dust collecting chamber of the dust removal mechanism is controlled to form negative pressure.

2. The dust removal method according to claim 1, characterized in that: The step of controlling the disturbance mechanism to disturb the multi-layer tab comprises: Controlling the disturbance mechanism to strike the multi-layered pole tab at least once from one side of the multi-layered pole tab along the stacking direction of the multi-layered pole tab; or Along the stacking direction of the multi-layer pole tab, the disturbance mechanism is controlled to move the multi-layer pole tab at least once from opposite sides of the multi-layer pole tab.

3. The dust removal method according to claim 1, characterized in that: The disturbance mechanism includes a dust suction channel; the step of controlling the disturbance mechanism to disturb the multi-layer tab includes: The dust suction channel generates negative pressure, and the multi-layer pole tabs are dusted through the dust suction channel.

4. The dust removal method according to claim 3, characterized in that: The negative pressure wind speed of the dust suction channel is 1-3 m / s.

5. The dust removal method according to claim 1, characterized in that: The negative pressure wind speed of the dust collecting chamber is 15-25 m / s.

6. The dust removal method according to any one of claims 1 to 5, characterized in that: The dust collecting chamber has an inlet and an air outlet; the air outlet is connected to the air extraction component through a pipeline; wherein the step of arranging the multi-layer tabs in the dust collecting chamber of the dust removal mechanism comprises: Insert the multi-layer pole ear into the dust collecting chamber from the inlet, and space the end of the multi-layer pole ear from the air outlet; wherein, along the direction from the root to the end of the multi-layer pole ear, the distance between the end of the multi-layer pole ear and the air outlet is 5 to 10 mm.

7. The dust removal method according to claim 6, characterized in that: Along the direction from the root to the end of the multi-layer pole ear, the inlet and the air outlet are arranged opposite to each other; wherein the step of arranging the multi-layer pole ear in the dust collecting chamber of the dust removal mechanism includes: The multi-layer electrode tab is inserted into the dust collecting chamber from the inlet along a direction from the root to the end of the multi-layer electrode tab.

8. The dust removal method according to claim 6, characterized in that: The direction from the root to the end of the multi-layer pole ear is defined as a first direction, the stacking direction of the multi-layer pole ear is defined as a second direction, and a third direction is defined to intersect both the first direction and the second direction; along the first direction, the dust collecting chamber has a first side wall and a third side wall opposite to each other; along the third direction, the dust collecting chamber has a second side wall and a fourth side wall opposite to each other; the first side wall has the air outlet, the second side wall has the inlet, the fourth side wall has the outlet, and the third side wall has a avoidance port connecting the inlet and the outlet; wherein, the step of arranging the multi-layer pole ear in the dust collecting chamber of the dust removal mechanism comprises: Inserting the multi-layer tab into the dust collecting chamber from the inlet along the third direction; The dust removal method further comprises: After the dust removal is completed, the multi-layer pole tab is moved out of the dust collecting chamber from the outlet along the third direction.

9. The dust removal method according to claim 6, characterized in that: Along the stacking direction of the multi-layer tabs, the dust collecting chamber has a top wall and a bottom wall opposite to each other; the top wall has a through hole; the disturbance mechanism includes: A driving member, disposed outside the dust collecting chamber; A disturbance member, one end of which is disposed in the dust collecting chamber, and the other end of which extends from the through hole to the outside of the dust collecting chamber and is connected to the driving member; Wherein, the driving member is used to drive the disturbing member to move, thereby disturbing the multi-layer pole ear.

10. The dust removal method according to claim 9, characterized in that: The disturbance element comprises: A disturbance block is disposed in the dust collecting chamber and is used to abut against the multi-layer pole ear; A connecting rod has one end disposed in the dust collecting chamber and connected to the disturbance block, and the other end extending from the through hole to the outside of the dust collecting chamber and connected to the driving member.

11. The dust removal method according to claim 10, characterized in that: The disturbance block is a flexible member, or at least the surface of the disturbance block for contacting the multi-layer tab is coated with a flexible layer.

12. The dust removal method according to claim 10, characterized in that: The multi-layer pole lug is a planar structure, and the surface of the disturbance block facing the multi-layer pole lug is inclined relative to the multi-layer pole lug; along the direction from the root to the end of the multi-layer pole lug, the distance between the surface of the disturbance block facing the multi-layer pole lug and the multi-layer pole lug gradually decreases.

13. The dust removal method according to claim 12, characterized in that: The angle between the surface of the disturbance block facing the multi-layer pole tab and the multi-layer pole tab is 5 to 45 degrees.

14. The dust removal method according to claim 12, characterized in that: Along the direction from the root to the end of the multi-layer pole ear, the surface of the disturbance block facing the multi-layer pole ear is connected to the side of the disturbance block to form two corners; wherein the step of arranging the multi-layer pole ear in the dust collecting chamber of the dust removal mechanism also includes: The disturbance block is located between the multi-layer pole lug and the top wall; along the stacking direction of the multi-layer pole lug, the projection of one corner on the plane where the multi-layer pole lug is located is located on the multi-layer pole lug, and the projection of another corner on the plane where the multi-layer pole lug is located is located outside the multi-layer pole lug.

15. The dust removal method according to claim 14, characterized in that: At least the corner projected on the multi-layer tab is smoothly transitioned.

16. The dust removal method according to claim 14, characterized in that: Along the stacking direction of the multi-layer pole lug, the ratio of the width of the projection of the surface of the disturbance block facing the multi-layer pole lug on the multi-layer pole lug to the width of the multi-layer pole lug is 1 / 3~2 / 3; wherein, the width of the projection is the dimension of the projection along the direction from the root to the end of the multi-layer pole lug, and the width of the multi-layer pole lug is the dimension of the multi-layer pole lug along the direction from the root to the end of the multi-layer pole lug.

17. A dust removal device, characterized in that: The dust removal device is used to remove dust from the multi-layer pole tabs of the electrode assembly before welding the multi-layer pole tabs; The dust removal device comprises: The dust removal mechanism has a dust collecting chamber; the dust collecting chamber has an inlet and an air outlet; the air outlet is connected to the air extraction component; the inlet is used for the multi-layer pole ear to be inserted into the dust collecting chamber; A disturbance mechanism is connected to the dust removal mechanism; at least a portion of the disturbance mechanism is disposed in the dust collecting chamber; the disturbance mechanism is used to disturb the multiple layers of pole ears in the dust collecting chamber to eject polluted particles between the pole ears of adjacent layers and / or change the interlayer gaps between the pole ears of adjacent layers.

18. The dust removal device according to claim 17, characterized in that: Along the first direction, the dust collecting chamber has a first side wall and a third side wall opposite to each other; along the second direction, the dust collecting chamber has a top wall and a bottom wall opposite to each other; along the third direction, the dust collecting chamber has a second side wall and a fourth side wall opposite to each other; wherein the first direction, the second direction and the third direction intersect each other; The first side wall has the air outlet, the second side wall has the inlet, the fourth side wall has the outlet, and the third side wall has a avoidance opening connecting the inlet and the outlet; the outlet is used for the multi-layer pole ear to move out of the dust collecting chamber.

19. The dust removal device according to claim 18, characterized in that: Along the first direction, the distance between the inlet and the first side wall is 4-9 mm, and the distance between the outlet and the first side wall is 4-9 mm.

20. The dust removal device according to claim 18, characterized in that: The disturbance mechanism includes a first surface located in the dust collecting chamber and away from the top wall, the first surface is inclined relative to the first direction; along the direction from the third side wall to the first side wall, the distance between the first surface and the bottom wall gradually decreases; the bottom wall is parallel to the first direction.

21. The dust removal device according to claim 20, characterized in that: The included angle between the first surface and the bottom wall is 5 to 45 degrees.

22. The dust removal device according to claim 20, characterized in that: The disturbance mechanism further includes two second surfaces connected to the first surface. Along the first direction, the first surface and the second surface are connected to form a corner, and the corner is a smooth transition.

23. The dust removal device according to any one of claims 17 to 22, characterized in that: The disturbance mechanism includes a dust suction channel.

24. The dust removal device according to claim 18, characterized in that: The top wall has a through hole, and the disturbance mechanism includes: A driving member, disposed outside the dust collecting chamber; A disturbance member, one end of which is disposed in the dust collecting chamber, and the other end of which extends from the through hole to the outside of the dust collecting chamber and is connected to the driving member; Wherein, the driving member is used to drive the disturbing member to move, thereby disturbing the multi-layer pole ear.

25. The dust removal device according to claim 24, characterized in that: The disturbance element comprises: A disturbance block is disposed in the dust collecting chamber and is used to abut against the multi-layer pole ear; A connecting rod has one end disposed in the dust collecting chamber and connected to the disturbance block, and the other end extending from the through hole to the outside of the dust collecting chamber and connected to the driving member.

26. The dust removal device according to claim 25, characterized in that: The disturbance mechanism comprises a dust suction channel, one end of which passes through the disturbance block, and the other end of which passes through the portion of the connecting rod located outside the dust collecting chamber.

27. The dust removal device according to claim 25, characterized in that: The disturbance block is a flexible member, or at least the surface of the disturbance block for contacting the multi-layer tab is coated with a flexible layer.

28. A dust removal system, characterized in that: include: The dust removal device according to any one of claims 17 to 27; A transmission mechanism, used for moving the electrode assembly so that the multi-layer electrode tab is inserted into the dust collecting chamber from the inlet; The controller is electrically connected to the dust removal mechanism and the disturbance mechanism, respectively, and is used to control the disturbance mechanism to disturb the multi-layer pole ears in the dust collecting chamber after the multi-layer pole ears are inserted into the dust collecting chamber from the inlet, and to control the dust removal mechanism to remove dust from the multi-layer pole ears.

29. A battery production system, characterized in that: include: The dust removal device according to any one of claims 17 to 27 is used to remove dust from the multi-layer tabs of the electrode assembly; The welding device is located downstream of the dust removal device and is used to weld the multi-layer pole ears of the electrode assembly after the dust is removed by the dust removal device.

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