Battery piece flattening device

Abstract

The utility model relates to a battery piece flattening device which comprises a first pressing plate and a second pressing plate which are oppositely arranged in a spaced mode, a plurality of first protruding pieces distributed at intervals are arranged on the surface, facing the second pressing plate, of the first pressing plate, and each first protruding piece is provided with a first working face. The surface, facing the first pressing plate, of the second pressing plate is provided with a plurality of second protruding pieces distributed at intervals, the second protruding pieces are provided with second working faces, and the first working faces and the second working faces are used for making contact with the two opposite surfaces of the battery pieces located between the first pressing plate and the second pressing plate respectively so as to flatten the battery pieces. The battery piece can be oppositely flattened from two directions through the multiple first protruding pieces and the multiple second protruding pieces, deformation of the battery piece can be recovered from the two directions at the same time in the flattening process through two-way flattening, the deformation amount of the battery piece in the flattening process is half of that of traditional one-way flattening, and when the battery piece is flattened, the deformation amount of the battery piece in the flattening process is greatly reduced. The risk of subfissure in the flattening process of the battery piece can be reduced.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a cell flattening device. Background Art

[0002] During the process of cell string welding, due to the different thermal shrinkage rates of the welding ribbon, cell and insulating glue, the cell string will bend toward the back, affecting the string welding accuracy and the hidden crack rate of the cell. Therefore, it is necessary to flatten the cell to reduce the problem of excessive warping of the cell string during the assembly manufacturing process. In the traditional solar cell flattening solution, the cell is flattened in one direction. The deformation of the cell flattening process is the warping height of the cell. The deformation of the cell from warping to flattening is large, and the cell is prone to hidden cracks. Utility Model Content

[0003] Based on this, it is necessary to provide a battery cell flattening device that can flatten the battery cell and reduce the risk of hidden cracks during the battery cell flattening process.

[0004] The present application provides a battery cell flattening device, comprising a first pressing plate and a second pressing plate arranged relatively to each other, a surface of the first pressing plate facing the second pressing plate being provided with a plurality of first protrusions distributed at intervals, the first protrusions having a first working surface, a surface of the second pressing plate facing the first pressing plate being provided with a plurality of second protrusions distributed at intervals, the second protrusions having a second working surface, the first working surface and the second working surface being respectively used for contacting two opposite surfaces of a battery cell located between the first pressing plate and the second pressing plate to flatten the battery cell.

[0005] In some embodiments, the first protrusions are distributed in a row along the length direction of the first pressing plate, the first protrusions extend along the width direction of the first pressing plate, and the length of the first protrusions is the same as the width of the first pressing plate.

[0006] In some embodiments, the first protrusions are distributed at equal intervals.

[0007] In some embodiments, the second protrusions are distributed in a row along the length direction of the second pressing plate, the second protrusions extend along the width direction of the second pressing plate, and the length of the second protrusions is the same as the width of the second pressing plate.

[0008] In some embodiments, the second protrusions are distributed at equal intervals.

[0009] In some embodiments, the first protrusions and the second protrusions are alternately staggered.

[0010] In some embodiments, the battery cell flattening device also includes a limit member, which is detachably connected to the surface of the second pressure plate facing the first pressure plate; the limit member protrudes from the surface of the second pressure plate facing the first pressure plate, and the thickness of the limit member is greater than that of the second protrusion.

[0011] In some embodiments, a plurality of through holes are formed on the second pressing plate, each of the through holes penetrates the second pressing plate along the thickness direction of the second pressing plate; and each of the through holes and each of the second protrusions are alternately distributed.

[0012] In some embodiments, the battery cell flattening device further includes a hand-held portion, which is disposed on both sides of the first pressing plate in the length direction, and is used for hand-holding the first pressing plate.

[0013] In some embodiments, a handle is provided on a surface of the second pressing plate away from the first pressing plate, and the handle is used for hand-holding the second pressing plate.

[0014] In some embodiments, a flexible layer is disposed on the first working surface.

[0015] In some embodiments, a flexible layer is disposed on the second working surface.

[0016] The above-mentioned battery cell flattening device includes a first pressing plate and a second pressing plate arranged at a relative interval. When the battery cell flattening device is used to flatten the battery cell, the battery cell can be placed between the first pressing plate and the second pressing plate, and the battery cell is flattened by the first pressing plate and the second pressing plate. A plurality of first protrusions distributed at intervals are arranged on the surface of the first pressing plate facing the second pressing plate, and a plurality of second protrusions distributed at intervals are arranged on the surface of the second pressing plate facing the first pressing plate. When flattening the battery cell, the first working surface of the first protrusion and the second working surface of the second protrusion are respectively used to contact the two opposite surfaces of the battery cell. The battery cell can be flattened from two directions in opposite directions by the plurality of first protrusions and the plurality of second protrusions. The battery cell can be restored to deformation from two directions at the same time during the flattening process by bidirectional flattening. The deformation amount of the battery cell flattening process is half of that of the traditional unidirectional flattening process. While flattening the battery cell, the risk of hidden cracks occurring during the flattening process can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a battery cell flattening device provided in one embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of a battery cell flattening device provided in one embodiment of the present application;

[0019] Figure 3 This is a comparison chart of the flattening effect of the battery cell flattening device of the present application and the effect of using a traditional flattening device on the battery cell, wherein (a) is a comparison of battery warpage, and (b) is a comparison of hidden crack rates.

[0020] Description of Reference Numerals

[0021] 10. First pressing plate; 11. First protruding member; 12. Hand-held portion; 20. Second pressing plate; 21. Second protruding member; 22. Position-limiting member; 23. Handle; 24. Through hole. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In this application, unless otherwise clearly specified and limited, the terms "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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] Reference Figure 1~2 The present application provides a battery cell flattening device, comprising a first pressing plate 10 and a second pressing plate 20 arranged at a relative interval, a surface of the first pressing plate 10 facing the second pressing plate 20 is provided with a plurality of first protrusions 11 distributed at intervals, the first protrusions 11 having a first working surface, a surface of the second pressing plate 20 facing the first pressing plate 10 is provided with a plurality of second protrusions 21 distributed at intervals, the second protrusions 21 having a second working surface, the first working surface and the second working surface are respectively used to contact two opposite surfaces of the battery cell located between the first pressing plate 10 and the second pressing plate 20 to flatten the battery cell.

[0028] The above-mentioned battery cell flattening device comprises a first pressing plate 10 and a second pressing plate 20 which are arranged at a relative interval. When the battery cell flattening device is used to flatten the battery cell, the battery cell can be placed between the first pressing plate 10 and the second pressing plate 20, and the battery cell is flattened by the first pressing plate 10 and the second pressing plate 20. A plurality of first protrusions 11 distributed at intervals are arranged on the surface of the first pressing plate 10 facing the second pressing plate 20, and a plurality of second protrusions 21 distributed at intervals are arranged on the surface of the second pressing plate 20 facing the first pressing plate 10. When flattening the battery cell, the first working surface of the first protrusion 11 and the second working surface of the second protrusion 21 are respectively used to contact the two opposite surfaces of the battery cell. The battery cell can be flattened from two directions in opposite directions by the plurality of first protrusions 11 and the plurality of second protrusions 21. The battery cell can be flattened from two directions at the same time by the bidirectional flattening process. The deformation amount of the battery cell flattening process is half of that of the traditional unidirectional flattening process. While flattening the battery cell, the risk of hidden cracks in the battery cell flattening process can be reduced.

[0029] In some embodiments, the first protrusions 11 are arranged in a row along the length direction of the first pressing plate 10 , and the first protrusions 11 extend along the width direction of the first pressing plate 10 . The length of the first protrusions 11 is the same as the width of the first pressing plate 10 .

[0030] Reference Figure 2 As shown, illustratively, Figure 2 The X direction is the length direction of the first pressing plate 10. Figure 2 The Y direction is the width direction of the first pressing plate 10. The length of each first protrusion 11 is the same as the width of the first pressing plate 10, and each first protrusion 11 is distributed in a row along the length direction of the first pressing plate 10, which is convenient for flattening the battery cell and can achieve a better flattening effect.

[0031] In some embodiments, the first protrusions 11 are distributed at equal intervals.

[0032] In some embodiments, the second protrusions 21 are arranged in a row along the length direction of the second pressing plate 20 , and extend along the width direction of the second pressing plate 20 . The length of the second protrusions 21 is the same as the width of the second pressing plate 20 .

[0033] Reference Figure 2 As shown, illustratively, Figure 2 The X direction is the length direction of the second pressing plate 20. Figure 2 The Y direction is the width direction of the second pressing plate 20. The length of each second protrusion 21 is the same as the width of the second pressing plate 20, and each second protrusion 21 is arranged in a row along the length direction of the second pressing plate 20, which is convenient for flattening the battery cell and can achieve a better flattening effect.

[0034] In some embodiments, the second protrusions 21 are distributed at equal intervals.

[0035] In some embodiments, the first protruding members 11 and the second protruding members 21 are alternately staggered.

[0036] The alternating staggered arrangement of the first protrusions 11 and the second protrusions 21 can evenly flatten the battery cell placed between the first pressing plate 10 and the second pressing plate 20 , achieving a flattening effect.

[0037] In some embodiments, the first working surfaces of the first protrusions 11 are located in the same plane and are parallel to the surface of the first pressing plate 10 facing the second pressing plate 20 .

[0038] In some embodiments, the second working surfaces of the second protrusions 21 are located in the same plane and are parallel to the surface of the second pressing plate 20 facing the first pressing plate 10 .

[0039] In some embodiments, the first protrusion 11 is detachably connected to the surface of the first pressing plate 10 facing the second pressing plate 20 .

[0040] In some embodiments, the second protrusion 21 is detachably connected to the surface of the second pressing plate 20 facing the first pressing plate 10 .

[0041] According to the thickness and specifications of the battery cell, the position and size of the first protrusion 11 and / or the second protrusion 21 can be replaced and adjusted, and the pressing height and position for flattening the battery cell can be adjusted, which is convenient for operation.

[0042] In some of the embodiments, the battery cell flattening device also includes a limit member 22, which is detachably connected to the surface of the second pressing plate 20 facing the first pressing plate 10; the limit member 22 protrudes from the surface of the second pressing plate 20 facing the first pressing plate 10, and the thickness of the limit member 22 is greater than the second protrusion 21.

[0043] The stopper 22 protrudes from the surface of the second pressing plate 20 facing the first pressing plate 10, and the thickness of the stopper 22 is greater than the second protrusion 21. When the second pressing plate 20 is used to flatten the battery cell downward, the contact between the stopper 22 and the surface of the first pressing plate 10 facing the second pressing plate 20 can limit the maximum displacement of the second pressing plate 20, thereby preventing damage to the battery cell caused by excessive downward pressure. At the same time, the stopper 22 is detachably connected to the surface of the second pressing plate 20 facing the first pressing plate 10. For different battery cell models and thicknesses, the stopper 22 of different sizes can be replaced to adjust the maximum downward pressure height according to needs.

[0044] It can be understood that the limit member 22 is arranged on the surface of the second pressure plate 20 facing the first pressure plate 10 and close to the edge of the second pressure plate 20, that is, when the second pressure plate 20 is placed above the battery cell, the limit member 22 will be located at the periphery of the battery cell and will only contact the surface of the first pressure plate 10 facing the second pressure plate 20 after pressing down, and will not affect the battery cell.

[0045] In some embodiments, a plurality of through holes 24 are formed on the second pressing plate 20 , and each through hole 24 penetrates the second pressing plate 20 along the thickness direction of the second pressing plate 20 ; and each through hole 24 and each second protrusion 21 are alternately distributed.

[0046] The second pressing plate 20 is provided with a plurality of through holes 24 , so that when the second pressing plate 20 is placed on the battery cell, the placement position of the second pressing plate 20 on the battery cell can be conveniently observed through the through holes 24 , thereby facilitating operation.

[0047] In some embodiments, the battery cell flattening device further includes a hand-held portion 12 , which is disposed on both sides of the first pressing plate 10 in the length direction, and is used for hand-holding the first pressing plate 10 .

[0048] In some embodiments, a handle 23 is provided on a surface of the second pressing plate 20 away from the first pressing plate 10 , and the handle 23 is used for hand-holding the second pressing plate 20 .

[0049] The second pressing plate 20 is held by the handle 23, so that the specific position of the second pressing plate 20 on the battery cell can be adjusted conveniently. The handle 23 is provided on the surface of the second pressing plate 20 away from the first pressing plate 10, so that the operator can hold the handle 23 and press the second pressing plate 20 downward, thus facilitating operation.

[0050] In some embodiments, the handle 23 includes a connecting portion and a grabbing portion, wherein the connecting portion is connected to the surface of the second pressing plate 20 away from the first pressing plate 10 , and the grabbing portion is connected to the connecting portion and is parallel to the surface of the second pressing plate 20 away from the first pressing plate 10 .

[0051] The gripping portion is connected to the connecting portion and is parallel to the surface of the second pressing plate 20 away from the first pressing plate 10 , so that the second pressing plate 20 can be moved and pressed down conveniently by holding the gripping portion.

[0052] In some of the embodiments, a flexible layer is disposed on the first working surface.

[0053] A flexible layer is arranged on the first working surface, which can protect the battery cell from being bumped during the flattening process and reduce the hidden cracks generated during the flattening process.

[0054] In some of the embodiments, a flexible layer is disposed on the second working surface.

[0055] A flexible layer is arranged on the second working surface to protect the battery cells from being bumped during the flattening process and reduce hidden cracks generated during the flattening process.

[0056] Reference Figure 3 As shown, Figure 3 This is a comparison chart of the flattening effect of the battery cell flattening device of the present application and the effect of using a traditional flattening device, where a is the comparison of battery warpage and b is the comparison of hidden crack rate. It can be seen that using the battery cell flattening device of the present application to flatten the battery cell can achieve a better flattening effect and reduce the risk of hidden cracks in the battery cell during the flattening process.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0058] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims, and the description and drawings may be used to interpret the contents of the claims.

Claims

1. A battery cell flattening device, characterized in that: The invention comprises a first pressing plate (10) and a second pressing plate (20) which are arranged at an interval relative to each other, wherein a plurality of first protrusions (11) which are distributed at intervals are arranged on a surface of the first pressing plate (10) facing the second pressing plate (20), and the first protrusions (11) have a first working surface, and a plurality of second protrusions (21) which are distributed at intervals are arranged on a surface of the second pressing plate (20) facing the first pressing plate (10), and the second protrusions (21) have a second working surface, and the first working surface and the second working surface are respectively used to contact two opposite surfaces of a battery cell located between the first pressing plate (10) and the second pressing plate (20) to flatten the battery cell.

2. The battery cell flattening device according to claim 1, characterized in that: The first protrusions (11) are arranged in a row along the length direction of the first pressing plate (10), and the first protrusions (11) extend along the width direction of the first pressing plate (10). The length of the first protrusions (11) is the same as the width of the first pressing plate (10).

3. The battery cell flattening device according to claim 2, characterized in that: The first protrusions (11) are distributed at equal intervals.

4. The battery cell flattening device according to claim 1, characterized in that: The second protrusions (21) are arranged in a row along the length direction of the second pressing plate (20), and the second protrusions (21) extend along the width direction of the second pressing plate (20). The length of the second protrusions (21) is the same as the width of the second pressing plate (20).

5. The battery cell flattening device according to claim 4, characterized in that: The second protrusions (21) are distributed at equal intervals.

6. The battery cell flattening device according to any one of claims 1 to 5, characterized in that: The first protruding parts (11) and the second protruding parts (21) are arranged alternately and staggered.

7. The battery cell flattening device according to any one of claims 1 to 5, characterized in that: The cell flattening device further comprises a limiting member (22), wherein the limiting member (22) is detachably connected to a surface of the second pressing plate (20) facing the first pressing plate (10); the limiting member (22) protrudes from the surface of the second pressing plate (20) facing the first pressing plate (10), and the thickness of the limiting member (22) is greater than that of the second protruding member (21).

8. The battery cell flattening device according to any one of claims 1 to 5, characterized in that: The second pressing plate (20) is provided with a plurality of through holes (24), each of the through holes (24) passing through the second pressing plate (20) along the thickness direction of the second pressing plate (20); and each of the through holes (24) and each of the second protruding parts (21) are alternately distributed.

9. The battery cell flattening device according to any one of claims 1 to 5, characterized in that: The battery cell flattening device further comprises a hand-held portion (12), the hand-held portion (12) being arranged on both sides of the first pressing plate (10) in the length direction, the hand-held portion (12) being used for hand-holding the first pressing plate (10); and / or, A handle (23) is provided on a surface of the second pressing plate (20) away from the first pressing plate (10), and the handle (23) is used for hand-holding the second pressing plate (20).

10. The battery cell flattening device according to any one of claims 1 to 5, characterized in that: A flexible layer is provided on the first working surface; and / or, A flexible layer is disposed on the second working surface.

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