Battery cell air bag shaping clamp

Abstract

The utility model relates to the technical field of battery cell production and manufacturing, in particular to a battery cell air bag shaping clamp which is used for shaping a battery cell, the battery cell comprises a packaging shell and a naked battery cell, the battery cell packaging shell is provided with a containing cavity, the naked battery cell is arranged in the battery cell containing cavity, an air bag is arranged on one side of the battery cell packaging shell, and the shaping clamp comprises a lower clamping plate and an upper clamping plate, the lower clamping plate is used for placing a battery cell, the upper clamping plate is arranged above the lower clamping plate and the battery cell, the upper clamping plate is movably arranged along the thickness direction of the battery cell so as to perform pressing or loosening action, a gasket is arranged on one surface, close to the lower clamping plate, of the upper clamping plate, a concave part is arranged at a position, close to the air bag, of the gasket and / or the lower clamping plate, and the concave part corresponds to a pit punching position of the air bag. Through the arrangement of the concave part, a containing space is provided for the pit punching position of the air bag in the process of leveling the air bag of the battery cell, the shape of the pit punching position is kept while the air bag is leveled, and it is guaranteed that the gas storage space is sufficient during formation of the battery cell, so that gas can be exhausted in time during formation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery cell production and manufacturing, in particular to a battery cell air bag shaping clamp. BACKGROUND

[0002] At present, after the soft package lithium ion battery is injected, in order to ensure that the electrolyte of the battery is kept in the pole piece position of the battery and does not flow to the air bag position, the battery cell is erected during the transfer and formation of the battery, so that the position distribution of the electrolyte is reasonable.

[0003] However, due to the inconsistent thickness of the air bag and the battery cell, the air bag is inevitably inclined after the battery is packaged. In order to ensure the accurate grabbing of the position of the air bag of the battery, an air bag shaping process is introduced in the preparation stage of the formation. However, the existing air bag shaping adopts a two-plate clamp, which can easily flatten the air bag pit and lose the gas storage space. The gas generated during the formation is more likely to stay in the main body of the battery cell (adsorbed state or free state), which is not conducive to the efficient discharge of the gas in a short time during the second sealing stage.

[0004] Therefore, there is an urgent need to invent a battery air bag shaping clamp. UTILITY MODEL CONTENTS

[0005] One of the purposes of the utility model is to provide a battery cell air bag shaping clamp to address the shortcomings of the prior art. The clamp can flatten the air bag while minimizing the impact on the air bag pit, ensuring efficient discharge of the air bag during the formation of the battery cell.

[0006] To solve the above technical problems, the application adopts the following technical scheme:

[0007] The utility model provides a kind of battery cell air bag shaping clamp, for battery cell shaping, the battery cell includes package shell and bare battery cell, the package shell is provided with containing cavity, the bare battery cell is set in the containing cavity, the package shell one side is equipped with air bag, the shaping clamp includes: lower clamping plate and upper clamping plate, the lower clamping plate is used to place the battery cell, the upper clamping plate is set in the lower clamping plate and the upper of battery cell, the upper clamping plate is movably set along the thickness direction of battery cell, to carry out compression or loose action, the one side of the upper clamping plate close to the lower clamping plate is provided with gasket, the gasket is provided with recess close to the air bag, and the recess is provided with the pit of the air bag.

[0008] Specifically, one end of the gasket around the recess is provided with a notch, and the notch and the recess are at least partially communicated, and the notch is arranged towards the connection between the air bag and the battery cell.

[0009] Specifically, the thickness of the gasket is greater than or equal to the thickness of the punch pit, and when the upper clamp plate is pressed against the air bag, the projection of the recess in the thickness direction covers the projection of the punch pit in the thickness direction.

[0010] Specifically, the gasket is arranged in an "E" shape.

[0011] Specifically, the gasket is arranged in an "L" shape.

[0012] Specifically, one side of the gasket close to the lower clamp plate is provided with a chamfer.

[0013] Specifically, the air cylinder is further arranged for controlling the vertical movement of the upper clamp plate.

[0014] Specifically, the moving device is further arranged between the air cylinder and the upper clamp plate for controlling the horizontal movement of the upper clamp plate.

[0015] Specifically, the lower clamp plate is provided with a groove corresponding to the position of the battery cell part, and the size of the groove corresponds to the size of the battery cell part.

[0016] Specifically, the material of the gasket is hard rubber or plastic.

[0017] The beneficial effects of the utility model lie in that the recess provides accommodation space for the punch pit of the air bag during the process of leveling the air bag, and the shape of the punch pit is maintained while leveling the air bag, which ensures sufficient gas storage space of the battery cell during formation, is beneficial to the timely discharge of gas during formation, improves the formation efficiency, avoids incomplete formation, and prevents the gas from staying in the battery cell to cause the energy density of the battery cell to decrease. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings described herein are used to provide further understanding of the utility model, and constitute a part of the utility model. The schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0019] Figure 1 It is one of the structure schematic diagrams of the utility model;

[0020] Figure 2 It is the second structure schematic diagram of the utility model;

[0021] Figure 3 It is the third structure schematic diagram of the utility model;

[0022] Figure 4 It is the fourth structure schematic diagram of the utility model;

[0023] Figure 5 is a schematic diagram of the battery cell flattening of the utility model;

[0024] Figure 6 is a schematic diagram of the battery cell flattening of the utility model;

[0025] Figure 7 is a front view of the moving device of the utility model;

[0026] Figure 8 is a top view of the moving device of the utility model;

[0027] Figure 9 is a side view of the moving device of the utility model.

[0028] 1 - upper clamping plate; 11 - gasket; 111 - recess; 112 - notch; 113 - chamfer; 2 - lower clamping plate; 21 - recess; 3 - air cylinder; 4 - moving device; 100 - battery cell; 1001 - bare battery cell; 1002 - air bag; 10021 - pit position. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application.

[0030] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0031] Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the claims, and any person skilled in the art can make several possible changes and modifications without departing from the concept of the present application, therefore the protection scope of the present application should be limited by the scope defined by the claims of the present application.

[0032] The utility model can be applicable to soft package battery core, and the soft package battery core refers to the battery core adopting soft material such as aluminum plastic film as outer package, and the preparation procedure of the soft package battery core includes homogenizing, coating, rolling, punching, laminating, punching, packaging, liquid injection and formation, wherein the procedure of punching is to deform the aluminum plastic film after feeding, to form a pit through a punching die, to facilitate the storage of the battery core and the formation of an air bag, the air bag is mainly used for collecting gas in the formation process, and the soft package battery core is closed formation, so the battery core cannot be pumped in the formation process, therefore, the gas formed in the formation process needs to be collected through the air bag, and in order to facilitate the collection of the gas in the formation process, the battery core needs to be placed vertically and the air bag needs to be placed upwards, and this way needs to clamp the part of the air bag in the battery core during the process of transferring and placing the battery core, and the air bag is composed of soft material, and is prone to skewing during the packaging process, and the clamp cannot accurately clamp the air bag after the air bag is skewed, therefore, the air bag of the battery core needs to be shaped to keep the air bag flat and accurately clamped.

[0033] The existing air bag shaping is generally to beat the air bag through a flat clamp on the upper and lower sides of the air bag, however, this way can affect the shape of the pit of the air bag, leading to the fact that the gas generated in the process of battery core formation cannot flow smoothly into the air bag, which can lead to incomplete formation or partial gas remaining in the battery core, resulting in the decline of battery performance.

[0034] In the application, by providing a containing space for the pit of the air bag, the process of flattening the air bag of the battery core will not affect the pit of the air bag, which is beneficial to the efficient discharge of the gas in the battery core during formation.

[0035] As shown in Figures 1-9 The utility model provides a kind of air bag 1002 shaping clamp for battery core 100 shaping, and battery core 100 includes package shell and bare battery core, and battery core package shell is provided with containing cavity, and battery core bare battery core 1001 is arranged in battery core containing cavity, and battery core package shell side is equipped with air bag 1002, and shaping clamp includes: lower clamping plate 2 and upper clamping plate 1, lower clamping plate 2 is used to place battery core 100, and upper clamping plate 1 is set in the upper of lower clamping plate 2 and battery core 100, and upper clamping plate 1 is movably set along the thickness direction of battery core 100, to carry out pressing or loosening action, and thickness direction is the direction perpendicular to the plane where air bag 1002 is located, and one side of upper clamping plate 1 close to lower clamping plate 2 is provided with gasket 11, and wherein gasket 11 is provided with recess 111 close to air bag 1002, and recess 111 is provided with pit 10021 corresponding to air bag 1002.

[0036] For example, when the air bag 1002 is shaped using the air bag 1002 shaping clamp of the present application, the battery cell 100 is placed on the lower clamp plate 2 and the position of the battery cell 100 is adjusted so that the air bag 1002 is positioned corresponding to the position of the upper clamp plate 1, and the upper clamp plate 1 is pressed down, when the upper clamp plate 1 is pressed down to the air bag 1002, the gasket 11 of the upper pressing plate presses and flattens the edge of the air bag 1002, and the impact pit position 10021 at the center of the air bag 1002 can be accommodated in the recess 111 when the air bag 1002 is shaped, so that the impact pit position 10021 is not stressed when the upper pressing plate is pressed down, and the shape of the impact pit position 10021 is not affected, while achieving the flattening of the air bag 1002, ensuring that the impact pit position 10021 can provide sufficient gas storage space for the gas formed during formation, and facilitating the smooth entry of the formation gas into the impact pit position 10021 to reduce the residual gas in the battery cell, preventing the formation gas from affecting the energy density of the battery cell 100.

[0037] As shown in Figure 2 Preferably, the gasket 11 is provided with a notch 112 at one end around the recess 111, the notch 112 and the recess 111 are at least partially connected, and the notch 112 is arranged towards the connection between the air bag 1002 and the bare battery cell 1001. Through this arrangement, when the gasket 11 is pressed onto the air bag 1002, a channel is left at the position where the air bag 1002 is connected to the bare battery cell 1001, and this position is not flattened, and the outer packaging of the battery cell 100 on both sides is not tightly attached, and when the battery cell 100 is formed, the gas can enter the impact pit position 10021 of the battery cell 100 through the channel where the outer packaging is not tightly attached, making it easier for the gas to enter.

[0038] Preferably, the thickness of the gasket 11 is greater than or equal to the thickness of the impact pit position 10021, when the recess is arranged on the gasket 11, in order to prevent the impact pit position 10021 from being in contact with the upper clamp plate 1 when pressed down, causing the impact pit position 10021 to be deformed by pressing against the upper clamp plate 1, and the present application can provide sufficient accommodation space for the impact pit position 10021, when the upper clamp plate 1 is pressed tightly against the air bag 1002, the projection of the recess 111 in the thickness direction covers the projection of the entire impact pit position 10021 in the thickness direction, and through this way, sufficient accommodation space is provided for the impact pit position 10021 in the circumferential direction, preventing deformation of the impact pit position 10021 due to insufficient accommodation space in the circumferential direction. In some embodiments, the distance between the inner boundary of the recess 111 and the impact pit position 10021 is greater than 5mm, avoiding the contact between the upper clamp and the impact pit position 10021, and preventing the stress on the outer packaging of the air bag 1002 during shaping from being transmitted to the impact pit position 10021, causing the impact pit position 10021 to deform.

[0039] AsFigure 5 As shown, preferably, the gasket 11 is arranged in an "E" shape, which can bypass the punch hole 10021 of the gas bag 1002 by arranging the gasket 11 in this shape, and the notch 112 is the most beneficial to the formation of the gas entering the recess 111, and by arranging two recesses 111, it is suitable for the gas bag 1002 with two punch holes 10021, and in other embodiments, the gasket 11 shape with more recesses 111 can be arranged according to the number of punch holes 10021.

[0040] As shown, preferably, the gasket 11 is arranged in an "E" shape, which can bypass the punch hole 10021 of the gas bag 1002 by arranging the gasket 11 in this shape, and the notch 112 is the most beneficial to the formation of the gas entering the recess 111, and by arranging two recesses 111, it is suitable for the gas bag 1002 with two punch holes 10021, and in other embodiments, the gasket 11 shape with more recesses 111 can be arranged according to the number of punch holes 10021. Figure 6 As shown, preferably, the gasket 11 is arranged in an "E" shape, which can bypass the punch hole 10021 of the gas bag 1002 by arranging the gasket 11 in this shape, and the notch 112 is the most beneficial to the formation of the gas entering the recess 111, and by arranging two recesses 111, it is suitable for the gas bag 1002 with two punch holes 10021, and in other embodiments, the gasket 11 shape with more recesses 111 can be arranged according to the number of punch holes 10021.

[0041] Figure 4 As shown, preferably, the gasket 11 is arranged in an "E" shape, which can bypass the punch hole 10021 of the gas bag 1002 by arranging the gasket 11 in this shape, and the notch 112 is the most beneficial to the formation of the gas entering the recess 111, and by arranging two recesses 111, it is suitable for the gas bag 1002 with two punch holes 10021, and in other embodiments, the gasket 11 shape with more recesses 111 can be arranged according to the number of punch holes 10021.

[0042] Specifically, it also includes a gas cylinder 3, which is used to control the vertical movement of the upper clamp plate 1, and the gas cylinder 3 realizes the flattening action of the battery cell 100 by pressing it down.

[0043] Preferably, the material of the gasket 11 is hard rubber or plastic, and one of the main functions of the gasket 11 is to prevent the battery cell 100 from being damaged due to external pressure or impact during use. Hard rubber or plastic has a certain elasticity, which can absorb or disperse external pressure, reduce the direct impact or pressure on the battery cell 100, and prevent the battery cell 100 from being damaged.

[0044] Preferably, it also includes a moving device 4, which is arranged between the gas cylinder 3 and the upper clamp plate 1, and is used to control the horizontal movement of the upper clamp plate 1. When the battery cell 100 is placed in the specified position of the lower clamp plate 2, the position of the upper clamp plate 1 can be accurately adjusted by the moving device 4, which is beneficial to the pressing of different positions of the battery cell 100.

[0045] As shown, preferably, the gasket 11 is arranged in an "E" shape, which can bypass the punch hole 10021 of the gas bag 1002 by arranging the gasket 11 in this shape, and the notch 112 is the most beneficial to the formation of the gas entering the recess 111, and by arranging two recesses 111, it is suitable for the gas bag 1002 with two punch holes 10021, and in other embodiments, the gasket 11 shape with more recesses 111 can be arranged according to the number of punch holes 10021. Figures 7-9 ​As shown, specifically, the lower clamp plate 2 is provided with a groove 21 corresponding to the placement position of the bare battery cell 1001, and the size of the groove 21 corresponds to the size of the bare battery cell 1001. When the battery cell 100 is placed on the lower clamp plate 2, due to the different thicknesses of the bare battery cell 1001 and the air bag 1002, the connection position between the bare battery cell 1001 and the air bag 1002 is bent after leveling, causing the flow of formation gas to be not smooth. By placing the bare battery cell 1001 in the groove 21, the bare battery cell 1001 and the air bag 1002 are located on the same horizontal plane, and after leveling the battery cell 100, the bare battery cell 1001 and the air bag 1002 are also located on the same horizontal plane.

[0046] The above description shows and describes several preferred embodiments of the present application, but as before, it should be understood that the present application is not limited to the forms disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the present application conceived herein, by the above teachings or related art or knowledge. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the claims of the present application.

Claims

1. An air bag shaping clamp for cell (100) shaping, the cell (100) comprising a package shell and a bare cell, the package shell being provided with a containing cavity, the bare cell (1001) being arranged in the containing cavity, and the package shell being provided with an air bag (1002) on one side, characterized in that, The shaping fixture comprises a lower clamp plate (2) for placing the battery cell (100) and an upper clamp plate (1) arranged above the lower clamp plate (2) and the battery cell (100), the upper clamp plate (1) being movably arranged along the thickness direction of the battery cell (100) to perform a pressing or loosening action, one side of the upper clamp plate (1) close to the lower clamp plate (2) being provided with a gasket (11), the gasket (11) being provided with a recess (111) close to the air bag (1002), the recess (111) being arranged corresponding to the impact pit (10021) of the air bag (1002).

2. The cell airbag trim fixture of claim 1, wherein: One end of the gasket (11) surrounding the recess (111) is provided with a notch (112), the notch (112) and the recess (111) being at least partially communicated, the notch (112) being arranged towards the connection between the air bag (1002) and the bare battery cell (1001).

3. The cell airbag trim fixture of claim 2, wherein: The thickness of the gasket (11) is greater than or equal to the thickness of the impact pit (10021), when the upper clamp plate (1) presses the air bag (1002), the projection of the recess (111) in the thickness direction covers the projection of the entire impact pit (10021) in the thickness direction.

4. The cell airbag trim fixture of claim 3, wherein: The gasket (11) is arranged in an "E" shape.

5. The cell airbag trim fixture of claim 3, wherein: The gasket (11) is arranged in an "L" shape.

6. The cell airbag trim fixture of claim 1, wherein: One side of the gasket (11) close to the lower clamp plate (2) is provided with a chamfer (113).

7. The cell airbag trim fixture of claim 1, wherein: A pneumatic cylinder (3) is further included for controlling the vertical movement of the upper clamp plate (1).

8. The cell airbag trim fixture of claim 7, wherein: A moving device (4) is further included, arranged between the pneumatic cylinder (3) and the upper clamp plate (1), for controlling the horizontal movement of the upper clamp plate (1).

9. The cell airbag trim fixture of claim 1, wherein: The lower clamp plate (2) is provided with a groove (21) corresponding to the position where the bare battery cell (1001) is placed, and the size of the groove (21) corresponds to the size of the bare battery cell (1001).

10. The cell airbag trim clamp of claim 1, wherein: The material of the gasket (11) is hard rubber or plastic.

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