Battery pole piece suction device

Abstract

The utility model relates to a battery pole piece suction device which comprises a shell and a panel, the shell comprises a first side face and a second side face which are oppositely arranged, a plurality of through holes are formed in the first side face and the second side face, and the through holes have a closed state and a communicated state; the panel is connected with the shell, the panel and the shell define a cavity, and micro suction holes are formed in the panel. The battery pole piece is adsorbed through the micro suction holes in the panel, so that the battery pole piece is attached to the panel, the suction force of the micro suction holes is controlled through closing and communicating of the through holes, flexible adjustment can be achieved according to the type of the battery pole piece, and the problem that the battery pole piece is damaged or wrinkled due to too large suction force in the piece suction process, and the performance of the battery is affected is avoided. The state of the through holes can be adjusted in the using process, when the battery pole pieces need to be released, the through holes in the closed state are adjusted to be in the communicated state, the suction force of the micro suction holes cannot bear the weight of the battery pole pieces, release of the battery pole pieces is achieved, the release process is controllable, and the lamination efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery assembly, in particular to a battery pole piece suction device. Background Art

[0002] With the development of renewable energy and electric transportation technologies, the development of battery technology has become crucial. Among them, the energy density of the battery is an important indicator to evaluate the battery performance, which determines the energy storage capacity and service time of the battery. With the continuous growth of the demand for electric vehicles and portable electronic devices, the requirements for battery energy density are also increasing day by day.

[0003] In the process of battery assembly, the lamination of battery pole pieces is a crucial link. The lamination process of battery pole pieces has an important impact on the performance and cost of the battery. Especially in the production of high-energy density batteries, the lamination accuracy, uniformity and stability of battery pole pieces are particularly important for battery performance.

[0004] In traditional technologies, the lamination is often carried out by the way of suction. However, due to the thin and low-strength battery pole pieces, the traditional suction device is very easy to cause wrinkles and damage to the battery pole pieces, affecting the energy density and performance stability of the battery. Summary of the Utility Model

[0005] Based on this, a battery pole piece suction device is provided to solve the problem that wrinkles and damage are easily generated when sucking the battery pole piece.

[0006] A battery pole piece suction device, the device includes:

[0007] A housing, including a first side and a second side arranged oppositely, and a plurality of through holes are arranged on the first side and the second side, and the through holes have a closed state and a communication state; and

[0008] A panel, connected to the housing and enclosing a cavity with the housing, and micro-suction holes are arranged on the panel.

[0009] In one embodiment, the housing further includes a third side and a fourth side arranged oppositely, and the first side, the second side, the third side and the fourth side are aligned and sealedly connected to the edge of the panel to form the cavity inside the housing.

[0010] In one embodiment, the device further includes:

[0011] Suction holes, correspondingly arranged on the third side and the fourth side, and the suction holes are externally connected to a vacuum pump for sucking air into the cavity to make the cavity form a negative pressure.

[0012] In one embodiment, the suction holes, the through holes and the micro-suction holes are communicated with the cavity.

[0013] In one embodiment, the first side surface includes a convex surface, and the panel is connected to the housing in a cross shape; the maximum dimensions of the panel in the first direction and the second direction are not less than the dimensions of the battery electrode in the first direction and the second direction.

[0014] In one embodiment, a buffer layer is provided on the surface of the panel away from the housing. The buffer layer is provided with openings corresponding to the micro-suction holes, and the buffer layer is adhered to the non-micro-suction hole part of the panel.

[0015] In one embodiment, the device further includes:

[0016] A support assembly, fixed inside the housing, for supporting the panel.

[0017] In one embodiment, the panel further includes:

[0018] Mounting holes, corresponding to the support assembly, for connecting the panel to the housing.

[0019] In one embodiment, the aperture of the micro-suction hole is 0.1 mm to 2 mm.

[0020] In one embodiment, when all the through holes are in a closed state, the battery electrode suction device is used to adsorb the capacitive battery electrode;

[0021] When some or all of the through holes are in a connected state, the battery electrode suction device is used to adsorb the rate-capable battery electrode.

[0022] The above battery electrode suction device adsorbs the battery electrode through the micro-suction holes on the panel, so that the battery electrode adheres to the panel, and the suction force of the micro-suction holes is controlled by the closing and connection of the through holes. It can be flexibly adjusted according to the type of the battery electrode, avoiding problems such as breakage or wrinkles of the battery electrode caused by excessive suction force during the suction process, which affects the battery performance. The through holes can also adjust the state during use. When it is necessary to release the battery electrode, the through holes in the closed state are adjusted to the connected state, and the suction force of the micro-suction holes cannot bear the weight of the battery electrode, realizing the release of the battery electrode, making the release process gentle and controllable, and effectively improving the lamination efficiency. During the suction process, the battery electrode is adsorbed on the panel, and it also avoids the misalignment or damage of the electrode caused by jitter or air flow during the transfer of the battery electrode. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 Structural schematic diagram of a battery electrode sheet suction device in an embodiment of the present utility model;

[0025] Figure 2 Structural schematic diagram of a battery electrode sheet suction device in another embodiment of the present utility model;

[0026] Figure 3 Exploded view of a battery electrode sheet suction device in an embodiment of the present utility model.

[0027] Reference numerals in the accompanying drawings in the specific embodiments are as follows:

[0028] Housing 10, panel 20, cavity 30, first side 102, second side 104, through hole 106, third side 108, fourth side 110, suction hole 112, micro-suction hole 202, mounting hole 204, opening 206, buffer layer 208, first support column 210, second support column 212. Specific embodiments

[0029] Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled 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 the specification and claims of this application and the above accompanying drawings are intended to cover non-exclusive inclusion.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0032] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher level than the second feature in terms of horizontal height. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature in terms of horizontal height.

[0035] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0036] Refer to Figure 1 , Figure 1 shows a schematic structural view of a battery electrode sheet suction device in an embodiment of the present utility model. An embodiment of the present utility model provides a battery electrode sheet suction device, which includes a housing 10 and a panel 20; the housing 10 includes a first side 102 and a second side 104 arranged oppositely, and a plurality of through holes 106 are provided on the first side 102 and the second side 104, and the through holes 106 have a closed state and a communication state; the panel 20 is connected to the housing 10 and encloses a cavity with the housing 10, and micro suction holes 202 are provided on the panel 20.

[0037] Specifically, the first side 102 and the second side 104 of the housing 10 are oppositely arranged along the first direction, the distance between the first side 102 and the second side 104 is not less than the width of the battery electrode sheet, and the dimensions of the first side 102 and the second side 104 in the second direction are not less than the length of the battery electrode sheet. The panel 20 has dimensions in the first direction and the second direction not less than those of the battery electrode sheet and is connected to the edges of the first side 102 and the second side 104; the panel 20 is provided with uniformly arranged micro-suction holes 202, and the micro-suction holes 202 are arranged in an array for adsorbing the battery electrode sheet. A plurality of through holes 106 are provided on the first side 102 and the second side 104, and the through holes 106 are used to adjust the suction force of the micro-suction holes 202. The through holes 106 have a closed state and a communication state for adjusting the suction force of the micro-suction holes 202 according to the type of the battery electrode sheet. Among them, the communication state of the through holes 106 means that the through holes 106 connect the internal cavity of the housing 10 with the external environment, and the closed state means that the through holes 106 isolate the internal cavity of the housing 10 from the external environment.

[0038] Exemplarily, during the process of laminating the battery electrode sheets, the laminating operation of the battery electrode sheets is performed by a battery electrode sheet suction device. The battery electrode sheet is a capacity-type battery electrode sheet. The length direction of the capacity-type battery electrode sheet is arranged along the second direction, and the width direction of the capacity-type battery electrode sheet is arranged along the first direction. The distance between the first side 102 and the second side 104 in the first direction is slightly larger than the width of the capacity-type battery electrode sheet, and the dimensions of the first side 102 and the second side in the second direction are slightly larger than the length of the capacity-type battery electrode sheet, so that the dimensions of the battery electrode sheet in both the first direction and the second direction are smaller than those of the housing; the panel 20 is flush-connected to the edge of the housing 10, that is, the dimension of the panel 20 in the first direction is slightly larger than the width of the capacity-type battery electrode sheet, and the dimension of the panel 20 in the second direction is slightly larger than the length of the capacity-type battery electrode sheet, so that the panel can completely cover the capacity-type battery electrode sheet. Since the thickness of the capacity-type battery electrode sheet is relatively thick, being 100 μm - 200 μm, all the through holes 106 need to be closed to provide a larger suction force. The panel 20 is aligned with the capacity-type battery electrode sheet, and the panel 20 is gently pressed on the surface of the capacity-type battery electrode sheet. The micro-suction holes 202 adsorb the capacity-type battery electrode sheet, so that the capacity-type battery electrode sheet fits on the surface of the panel 20; the battery electrode sheet suction device is transferred to the lamination platform, the panel 20 is aligned with the previous battery electrode sheet, and the panel 20 is gently pressed on the previous battery electrode sheet. At this time, all or part of the through holes 106 are opened, the micro-suction holes 202 stop adsorbing, and the capacity-type battery electrode sheet is released, so that the battery electrode sheets are aligned and stacked.

[0039] In this embodiment, the battery electrode sheet is adsorbed through the micro-suction holes on the panel, so that the battery electrode sheet adheres to the panel, and the suction force of the micro-suction holes is controlled by the closing and connection of the through holes, which can be flexibly adjusted according to the type of the battery electrode sheet, avoiding problems such as breakage or wrinkles of the battery electrode sheet caused by excessive suction force during the sheet suction process, which affects the battery performance. The through holes can also adjust the state during use. When it is necessary to release the battery electrode sheet, the through holes in the closed state are adjusted to the connected state, and the suction force of the micro-suction holes cannot bear the weight of the battery electrode sheet, realizing the release of the battery electrode sheet, making the release process gentle and controllable, and effectively improving the lamination efficiency. During the sheet suction process, the battery electrode sheet is adsorbed on the panel, and it also avoids the misalignment or damage of the electrode sheet caused by jitter or air flow during the transfer of the battery electrode sheet.

[0040] Please continue to refer to Figure 1 , in some embodiments, the housing 10 further includes a third side surface 108 and a fourth side surface 110 that are oppositely arranged. The first side surface 102, the second side surface 104, the third side surface 108, and the fourth side surface 110 are aligned and sealedly connected to the edge of the panel 20, forming a cavity 30 inside the housing 10. Suction holes 112 are provided on both the third side surface 108 and the fourth side surface 110. The suction holes 112, the through holes 106, and the micro-suction holes 202 communicate with the cavity 30.

[0041] Specifically, both ends of the third side surface 108 and the fourth side surface 110 are respectively connected to the first side surface 102 and the second side surface 104, so that the housing 10 and the panel 20 form a cavity 30, and the suction holes 112, the through holes 106, and the micro-suction holes 202 all communicate with the cavity 30. Suction holes 112 are provided on both the third side surface 108 and the fourth side surface 110. The suction holes 112 are oppositely arranged in the second direction, and the suction holes 112 are externally connected to a vacuum pump. The vacuum pump extracts the gas in the cavity 30 through the suction holes 112, making the inside of the cavity 30 form a negative pressure, constituting a negative pressure cavity, and adjusting the pressure in the negative pressure cavity by changing the state of the through holes 106. Exemplarily, when the adsorbed battery electrode sheet is a capacity-type battery electrode sheet, all the through holes 106 are adjusted to the closed state, the pressure in the negative pressure cavity increases, the adsorption force of the micro-suction holes 202 increases, and the micro-suction holes 202 adsorb the capacity-type battery electrode sheet; after reaching the lamination platform, all or part of the through holes 106 are adjusted to the connected state, the pressure in the negative pressure cavity decreases, the adsorption force of the micro-suction holes 202 decreases, and it cannot bear the capacity-type battery electrode sheet, releasing the capacity-type battery electrode sheet to complete the lamination of the battery electrode sheet.

[0042] In this embodiment, a cavity is formed between the housing and the panel. The suction holes, through holes, and micro-suction holes communicate with the cavity. The suction holes are connected to a vacuum pump to form a negative pressure cavity inside the cavity. The micro-suction holes generate an adsorption force to achieve the transfer and stacking of battery electrodes. By adjusting the state of the through holes, the adsorption force of the micro-suction holes can be adjusted. Without changing the suction force of the vacuum pump, only by adjusting the state of the through holes, the adsorption force of the micro-suction holes can be adjusted, so that the adsorption force of the micro-suction holes can be quantitatively adjusted to be applicable to different types of battery electrodes, improving the applicable range of the battery electrode suction device, avoiding damage to the battery electrodes, and improving the yield rate.

[0043] Please continue to refer to Figure 1 , in some embodiments, the first side surface 102 includes a convex surface, and the panel 20 is connected to the housing 10 in a cross shape; the maximum dimensions of the panel 20 in the first direction and the second direction are not less than the dimensions of the battery electrode in the first direction and the second direction.

[0044] Specifically, the first side surface 102 includes a first convex surface, and the second side surface 104 includes a second convex surface. The heights of the first convex surface and the second convex surface protruding in the first direction are the same, so that the overall housing 10 is in a cross shape, and the edge of the panel 20 is connected to the housing 10, that is, the panel 20 is also in a cross shape. The range between the first convex surface and the second convex surface can form a first adsorption area for the battery electrode. There is a second adsorption area for the battery electrode between the third side surface 108 and the fourth side surface 110. According to the size of the battery electrode, a suitable adsorption area is selected for stacking. Exemplarily, the width of the battery electrode is greater than the dimension of the second adsorption area in the first direction but less than the dimension of the first adsorption area in the second direction, and the length of the battery electrode is also less than the dimension of the first adsorption area in the first direction. At this time, the first adsorption area is selected to move and stack the battery electrode.

[0045] In this embodiment, the panel is divided into a first adsorption area and a second adsorption area, enabling the battery electrode suction device to be applicable to battery electrodes of various sizes; the size of the battery electrode is smaller than the size of the panel, which can avoid the battery electrode from shaking or being damaged due to air flow during adsorption, and can also avoid warping around the battery electrode when the battery electrode is flattened by the panel.

[0046] Combined with Figure 2 shown, Figure 2 FIG. shows a schematic structural diagram of a battery electrode suction device according to an embodiment of the present invention. In some embodiments, the aperture of the micro-suction hole is 0.1 mm to 2 mm. A buffer layer 208 is provided on the surface of the panel 20 away from the housing 10. The buffer layer 208 is provided with an opening 206 corresponding to the micro-suction hole, and the buffer layer 208 is adhered to the non-micro-suction hole part of the panel 20.

[0047] Specifically, a cavity 30 is jointly formed by one side of the panel 20 close to the housing 10 and the interior of the housing 10. A buffer layer 208 is provided on the side of the panel 20 away from the housing 10. The buffer layer 208 can be foam plastic, rubber, gel, sponge, etc. The buffer layer 208 is provided with through holes 206, and the through holes 206 correspond to the micro-suction holes one by one. The buffer layer 208 is bonded to the surface of the panel 20, and the through holes 206 are placed corresponding to the micro-suction holes. Exemplarily, the aperture of the micro-suction holes is 0.1 mm to 2 mm, and the buffer layer 208 is a sponge layer with a uniform thickness not exceeding 1 mm; during the process of adsorbing the battery electrode sheet, the sponge layer is in flexible contact with the battery electrode sheet, and after the battery electrode sheet is transferred to the lamination platform, the panel 20 can still flatten the battery electrode sheet.

[0048] In this embodiment, a buffer layer is bonded to the panel, so that the battery electrode sheet is flexibly connected to the buffer layer, avoiding direct contact between the battery electrode sheet and the micro-suction holes, which may cause damage to the battery electrode sheet, especially to the active material layer of the battery electrode sheet, by the edge part of the micro-suction holes, improving the safety of the process of sucking the battery electrode sheet and making the battery performance more stable; the aperture of the micro-suction holes is 0.1 mm to 2 mm, avoiding insufficient adsorption force due to too small aperture of the micro-suction holes and being unable to adsorb the battery electrode sheet, or damaging the battery electrode sheet due to the formation of needle-shaped suction force caused by too small aperture, and also avoiding too large aperture of the micro-suction holes, which may cause wrinkles on the battery electrode sheet.

[0049] Please refer to Figure 3 , Figure 3 which shows an exploded view of the battery electrode sheet sucking device in an embodiment of the present invention. In some embodiments, the device further includes a support assembly, and the panel 20 includes mounting holes 204 corresponding to the support assembly.

[0050] Specifically, the support assembly includes a first support column 210 and a second support column 212. The first support column 210 and the second support column 212 are arranged along the second direction and are located on the central axes of the first side surface 102 and the second side surface 104. The first end of the support assembly is fixed on the housing 10, and the second end of the support assembly is in contact with the panel 20. Through the mounting holes 204 on the panel 20, the panel 20 is fixed on the support assembly, and the support assembly provides a supporting force for the panel 20. Optionally, the second end of the support assembly is fixed on the panel 20 and is integrated with the panel 20, and the first end of the support assembly is fixedly connected to the housing 10 by means of screwing, riveting, etc.

[0051] Exemplarily, when the cavity 30 is a negative pressure cavity, when the size of the panel 20 is too large, it will be deformed under the influence of air pressure. At this time, the support assembly provides a supporting force for the panel 20 to avoid bending of the panel 20, and further avoid bending of the adsorbed battery electrode sheet; optionally, according to the size of the panel 20, only the first support column 210 is provided in the support assembly to provide sufficient supporting force for the panel 20.

[0052] In this embodiment, the inside of the housing 10 provides a supporting force for the panel through the supporting component, ensuring that the panel does not deform under negative pressure and ensuring that the battery electrode plate is always in a flat state, making the lamination process stable and reliable; it also avoids excessive pressure on the edge of the battery electrode plate during the process of flattening the battery electrode plate by the panel, thus preventing damage to the battery electrode plate.

[0053] Please continue to refer to Figure 2 , in some embodiments, when all the through holes 106 are in a closed state, the battery electrode plate suction device is used to adsorb the capacitive battery electrode plate; when some or all of the through holes 106 are in a communicating state, the battery electrode plate suction device is used to adsorb the rate-capable battery electrode plate.

[0054] Exemplarily, when the type of the battery electrode plate is a capacitive battery electrode plate, the thickness of the capacitive battery electrode plate is 100μm - 200μm. The battery electrode plate suction device needs to provide a relatively large adsorption force to make the capacitive battery electrode plate adhere to the panel 20. At this time, the states of all the through holes 106 are adjusted to the closed state, and the air intake part in the negative pressure chamber is the micro-suction holes, and the adsorption force of the micro-suction holes is enhanced, so that the capacitive battery electrode plate adheres to the panel 20. After the battery electrode plate suction device transfers the capacitive battery electrode plate to the lamination platform and aligns it with the previous capacitive battery electrode plate, the panel 20 is aligned with the capacitive battery electrode plate and pressed on the previous capacitive battery electrode plate, and is flattened by the panel 20; some or all of the through holes 106 are adjusted from the closed state to the communicating state, and the external gas enters the negative pressure chamber through the through holes 106, and the pressure level in the negative pressure chamber decreases, thereby reducing the adsorption force of the micro-suction holes and releasing the capacitive battery electrode plate.

[0055] When the type of the battery electrode plate is a rate-capable battery electrode plate, the thickness of the rate-capable battery electrode plate is 30μm - 100μm. It is necessary to reduce the pressure level in the negative pressure chamber so that the adsorption force can adsorb the rate-capable battery electrode plate while avoiding damage to the rate-capable battery electrode plate. At this time, the state of the through holes 106 is set according to the thickness of the rate-capable battery electrode plate. For example, when the thickness of the rate-capable battery electrode plate is 50μm, 3 through holes 106 on the first side 102 are kept in the closed state, 5 through holes 106 are in the communicating state, and the states of the through holes 106 at the corresponding positions on the second side 104 and the first side 102 are also the same. The communicating through holes 106 and the micro-suction holes together serve as the air intake part of the negative pressure chamber and provide sufficient adsorption force to adsorb the rate-capable battery electrode plate on the panel 20. After the battery electrode plate suction device transfers the rate-capable battery electrode plate to the lamination platform and aligns it with the previous rate-capable battery electrode plate, the panel 20 is aligned with the rate-capable battery electrode plate and pressed on the previous rate-capable battery electrode plate, and is flattened by the panel 20; some or all of the through holes 106 in the closed state are adjusted to the communicating state, and the external gas enters the negative pressure chamber through the through holes 106, reducing the pressure level in the negative pressure chamber, thereby reducing the adsorption force of the micro-suction holes and releasing the rate-capable battery electrode plate.

[0056] In this embodiment, the adsorption force of the battery electrode sheet suction device is adjusted through the through holes, enabling the battery electrode sheet suction device to adsorb various types of battery electrode sheets, improving the applicable range of the battery electrode sheet suction device, and avoiding damaging the battery electrode sheet due to excessive adsorption force or causing wrinkles; when releasing the battery electrode sheet, it is only necessary to adjust the through holes from the closed state to the communicating state to achieve the release of the battery electrode sheet, without the need to stop the vacuum pump, avoiding frequent start-stop, and making the adsorption, release, and flattening processes of the battery electrode sheet suction device smooth.

[0057] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0058] The above-described embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent should be subject to the appended claims.

Claims

1. A battery pole piece suction device, characterized in that: The device comprises: A housing, comprising a first side surface and a second side surface arranged opposite to each other, wherein a plurality of through holes are arranged on the first side surface and the second side surface, and the through holes have a closed state and a connected state; and A panel is connected to the shell and forms a cavity with the shell. The panel is provided with micro-suction holes.

2. The device according to claim 1, characterized in that The shell further comprises a third side surface and a fourth side surface which are arranged opposite to each other. The first side surface, the second side surface, the third side surface and the fourth side surface are aligned and sealed with the edge of the panel to form the cavity with the shell.

3. The device according to claim 2, characterized in that Also includes: Suction holes are correspondingly arranged on the third side surface and the fourth side surface. The suction holes are externally connected to a vacuum pump and are used to suck air from the cavity to form a negative pressure in the cavity.

4. The device according to claim 3, characterized in that The suction hole, the through hole and the micro-suction hole are communicated with the cavity.

5. The device according to claim 2, characterized in that The first side surface includes a convex surface, and the panel is connected to the shell in a cross shape; the maximum dimensions of the panel in the first direction and the second direction are not less than the dimensions of the battery electrode in the first direction and the second direction.

6. The device according to claim 1, characterized in that A buffer layer is arranged on a side of the panel away from the shell, the buffer layer is provided with openings corresponding to the micro-suction holes, and the buffer layer is adhered to the non-micro-suction hole part of the panel.

7. The device according to claim 1, characterized in that The device also includes: A supporting assembly is fixed inside the shell and is used to support the panel.

8. The device according to claim 7, characterized in that The panel also includes: The mounting hole is opened corresponding to the supporting assembly and is used to connect the panel and the shell.

9. The device according to claim 1, characterized in that The micro-suction hole has a diameter of 0.1 mm to 2 mm.

10. The device according to claim 1, characterized in that When all the through holes are in a closed state, the battery pole piece suction device is used to absorb the capacitive battery pole piece; When part or all of the through holes are in a connected state, the battery pole piece suction device is used to absorb the rate battery pole piece.

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