Pressurizing device for soft package battery

Abstract

The utility model relates to the technical field of lithium ion battery processing, and discloses a pressurizing device for a soft package battery, which comprises a main plate and a shape changing plate formed by laminating a top plate, gaskets and a rear plate, the thickness of the shape changing plate is adjusted through the thickness and / or the number of the gaskets, and the main plate is detachably connected with the shape changing plate. A traditional shape changing plate is integrally optimized to be of a structure that the top plate, the gaskets and the rear plate are stacked and matched, the thickness of the shape changing plate is determined by the thickness and / or the number of the gaskets, and the top plate and the rear plate are detachably connected. The thickness and / or the number of the gaskets are / is changed to change the thickness of the shape changing plate, so that the pressurizing device is suitable for pressurizing operation of ground battery cells with different thicknesses, formation requirements of the ground battery cells with different thicknesses can be met, and the production cost of the battery cells with different specifications is reduced. The technical problem that in an existing soft package battery cell pressurizing device, the thickness of the battery cell adapted to the same shape changing plate is single, and consequently the production cost of the battery cell is high can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium - ion batteries, and particularly relates to a pressurizing device for a soft - package battery. Background Art

[0002] A soft - package battery mainly consists of a positive electrode, a negative electrode, an electrolyte, a separator and an outer package. It is a rechargeable battery with a bag - shaped appearance and a paste - like interior, and is a lithium - ion battery using an aluminum - plastic composite film as the outer shell. During the production process of a soft - package lithium - ion battery, due to its aluminum - plastic encapsulation structure, its outer shape determines that the electrode sheets cannot be closely arranged, and voids are likely to be generated between the electrode sheets. The gas generated during the battery formation process is also likely to remain between the electrode sheets, and the gas cannot be completely discharged during the subsequent sealing, thus affecting the battery performance. Therefore, in actual production, a pressurization process is adopted during charging to discharge the gas between the electrode sheets. At the same time, during formation, a pressurizing device needs to apply a large pressure to ensure that the gas in the battery cell is discharged into the airbag, so as to ensure good surface reaction of the electrode sheets and high battery cell capacity and other performances. First During charging, the gas between the electrode sheets is discharged by a pressurization process. At the same time, during formation, a pressurizing device needs to apply a large pressure to ensure that the gas in the battery cell is discharged into the airbag to ensure good surface reaction of the electrode sheet surface and high battery cell capacity and other performances.

[0003] The existing pressurizing device includes a fixed plate and a plurality of movable plates. A battery cell is placed between every two adjacent plates, and the movement of the movable plates is controlled to simultaneously pressurize a plurality of battery cells to ensure that the battery cells can be formed smoothly. During actual production, the pressure needs to be controlled. Usually, the pressurizing distance of the movable plates is controlled under a fixed pressure value. However, due to the problem of poor thickness consistency of the battery cells and the inclusion of design tolerances, the thickness variation can reach 0.5 mm. Taking a pressurizing device for 32 battery cells as an example, under the action of the cumulative effect, when the pressurizing device pressurizes, the pressurizing position of the outermost movable plate farthest from the fixed plate needs to change by 16 mm, which obviously cannot meet the usage requirements of battery cells with different thicknesses, resulting in the need to replace different pressurizing devices for the formation of battery cells with different specifications, and the production cost is high.

[0004] In the prior art, in order to overcome the problem that the above - mentioned pressurizing device cannot be compatible with battery cells of different specifications and directly replacing the pressurizing device leads to high production costs, different thickness of shaping plates are usually replaced to avoid replacing the device, so as to reduce the usage cost of the pressurizing device. However, in the existing pressurizing device, the shaping plates are integrally formed, and the price is relatively high and cannot be configured in multiple thicknesses. Different types of batteries need to replace different shaping plates. Therefore, it is urgent to develop a shaping plate that can be compatible with battery cells of different specifications and has a low cost to reduce the production cost of the battery. Summary of the Utility Model

[0005] The main object of the present utility model is to provide a pressurizing device for soft-pack batteries, aiming to solve the technical problem in the background art that the thickness of the battery cells adapted by the same shape-changing plate is relatively single in the existing soft-pack battery cell pressurizing device, resulting in high production costs of the battery cells.

[0006] To achieve the above-mentioned utility model object, on the one hand, the present utility model provides a pressurizing device for soft-pack batteries, including a main board and a shape-changing plate formed by laminating a top plate, a gasket, and a rear plate. Among them, the thickness of the shape-changing plate is adjusted by the thickness and / or quantity of the gasket, and the main board is detachably connected to the shape-changing plate.

[0007] Further, supporting platforms are provided at the bottoms of both the main board and the shape-changing plate. The supporting platform includes a first supporting platform provided at the bottom of the top plate, a second supporting platform provided at the bottom of the rear plate, and a third supporting platform provided on the main board and on the side opposite to the first and second supporting platforms. The bottom of the first supporting platform abuts against the top surface of the second supporting platform, and the bottom of the gasket abuts against the top surface of the second supporting platform.

[0008] Further, relief openings are provided at the bottoms of both the main board and the shape-changing plate, and the relief openings divide the supporting platforms to form a structure in which the supporting platforms and the relief openings are arranged alternately.

[0009] Further, the main board is provided with a sliding groove formed by a U-shaped card slot with its two side notches facing each other and a middle groove. The sliding groove is used to slide the shape-changing plate in from the side, and the U-shaped card slot is used to engage with the shape-changing plate.

[0010] Further, deformation layers capable of deforming under extrusion are provided on the working surfaces of both the main board and the shape-changing plate to clamp the soft-pack battery.

[0011] Further, mounting holes are provided above the main board, and mounting openings adapted to the mounting holes are provided above the shape-changing plate. The main board and the shape-changing plate are clamped by bolts passing through the mounting holes and the mounting openings.

[0012] Further, sliding members for connecting to other components are provided on both sides above the main board.

[0013] Further, a guiding member is also provided at the bottom of the main board, and the guiding member is provided with a guiding hole for sliding connection.

[0014] Further, the pressing device for the soft-pack battery further includes: a tray frame body, the tray frame body is provided with a first end plate, a second end plate and a plurality of sliding guide rods, and two ends of the plurality of sliding guide rods are detachably connected to the first end plate and the second end plate respectively; a pressing plate, the pressing plate is slidably connected to the sliding guide rods and can slide relatively, and is further provided with a pressing rod for movably connecting to the first end plate; sliding members arranged on both sides above the plurality of main boards and guide holes of the bottom guide members of the main boards are respectively slidably connected to the sliding guide rods and are located between the pressing plate and the second end plate.

[0015] Further, the pressing device for the soft-pack battery further includes: a plurality of flexible connectors, the plurality of flexible connectors are used for connecting the plurality of main boards, and two ends of the flexible connectors are respectively fixedly connected to the second end plate and the pressing plate; fixing members for fixing the flexible connectors are arranged on the outer sides of the sliding members and the guide members, the flexible connectors are connected to the sliding members on both sides above the plurality of main boards through the fixing members, and the flexible connectors are connected to both sides of the guide members at the bottoms of the plurality of main boards through the fixing members.

[0016] Beneficial effects: Compared with the prior art, a pressing device for a soft-pack battery according to an embodiment of the present application includes a main board and a shaping plate formed by laminating a top plate, a gasket and a rear plate, and the thickness of the shaping plate changes with the thickness and quantity of the gasket, and the main board is detachably connected to the shaping plate. This technical solution optimizes the traditional integral shaping plate into a structure in which the top plate, the gasket and the rear plate are laminated and matched, the thickness of the shaping plate is determined by the thickness and / or quantity of the gasket, and the top plate and the rear plate are detachably connected; by changing the thickness and / or quantity of the gasket, the thickness of the shaping plate is changed, which is suitable for the pressing operation of electric cores with different thicknesses, is beneficial to meeting the formation requirements of electric cores with different thicknesses, and reduces the production costs of electric cores with different specifications.

[0017] Compared with the prior art, a pressing device for a soft-pack battery according to an embodiment of the present application further includes a tray frame body, the tray frame body is provided with a first end plate, a second end plate and a plurality of sliding guide rods, and both ends of the plurality of sliding guide rods are detachably connected to the first end plate and the second end plate; a pressing plate, the pressing plate is slidably connected to the sliding guide rods and can slide relative to each other, and is further provided with a pressing rod for movably connecting to the first end plate; sliding members are provided on both sides above the plurality of main boards, and the guide holes of the bottom guide members of the main boards are respectively slidably connected to the sliding guide rods and are located between the pressing plate and the second end plate; and a plurality of flexible connectors, both ends of the plurality of flexible connectors are fixedly connected to the second end plate and the pressing plate respectively; fixing members for fixing the flexible connectors are provided on the outer sides of the sliding member guide members, the flexible connectors are connected to the sliding members on both sides above the plurality of main boards through the fixing members, and the flexible connectors are connected to both sides of the guide members at the bottoms of the plurality of main boards through the fixing members. It can be understood that the above pressing device can have all the technical features and beneficial effects of the above-mentioned shaping plate, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a shaping plate clamping a soft-pack battery cell in the prior art;

[0019] Figure 2 is a three-dimensional schematic diagram of a combined structure of a main board and a shaping plate provided by an embodiment of the present invention;

[0020] Figure 3 is an exploded schematic diagram of a main board and a shaping plate provided by an embodiment of the present invention;

[0021] Figure 4 is another exploded schematic diagram of a main board and a shaping plate provided by an embodiment of the present invention;

[0022] Figure 5 is a side schematic diagram of a combined structure of a main board and a shaping plate provided by an embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of the whole pressing device clamping a battery cell for pressing provided by an embodiment of the present invention;

[0024] Figure 7 is another schematic diagram of the whole pressing device clamping a battery cell for pressing provided by an embodiment of the present invention;

[0025] Figure 8 is a partial schematic diagram of the pressing device clamping a battery cell for pressing provided by an embodiment of the present invention;

[0026] Figure 9 is a side schematic diagram of a main board provided by an embodiment of the present invention;

[0027] Figure 10It is a three-dimensional schematic diagram of another combination structure of a main board and a shape-changing board provided by an embodiment of the present utility model;

[0028] Figure 11 It is a three-dimensional structural schematic diagram of a first partition provided by an embodiment of the present utility model;

[0029] Figure 12 It is another three-dimensional structural schematic diagram of a first partition provided by an embodiment of the present utility model.

[0030] Wherein:

[0031] 10 - Main board; 100 - Third support platform; 101 - Slide groove; 1011 - U-shaped card slot; 1012 - Intermediate groove; 102 - Mounting hole; 103 - Sliding member; 1030 - Fixing member; 104 - Guide member; 1040 - Guide hole; 11 - Shape-changing board; 11a - Threaded hole; 11b - Avoidance opening; 110 - Top plate; 1100 - First support platform; 1100c - Bottom of the first support platform; 111 - Spacer; 111e - Bottom of the spacer; 112 - Rear plate; 1120 - Second support platform; 1120d - Top surface of the second support platform; 1121 - Mounting opening; 12 - Deformation layer;

[0032] 2 - Tray frame body; 20 - First end plate; 21 - Second end plate; 22 - Sliding guide rod; 23 - Pressing plate; 230, Pressing rod; 24 - Flexible connecting member; 25 - Bracket; 26 - First partition; 27 - Second partition.

[0033] The realization, functional characteristics and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0034] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0035] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" 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, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside 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 present utility model can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0038] Referring to Figures 2 to 5 , an embodiment of the present utility model provides a pressing device for a soft-pack battery, including: a main board 10 and a shaping board 11 formed by laminating a top board 110, a gasket 111, and a rear board 112. The thickness of the shaping board 11 is adjusted by the thickness and / or quantity of the gasket 111, and the main board 10 is detachably connected to the shaping board 11.

[0039] A pressing device for a soft-pack battery according to an embodiment of the present application includes a main board 10 and a shaping board 11 formed by laminating a top board 110, a gasket 111, and a rear board 112. The thickness of the shaping board 11 changes with the thickness and quantity of the gasket 111, and the main board 10 is detachably connected to the shaping board 11. This technical solution optimizes the traditional integral shaping board 11 into a structure in which the top board 110, the gasket 111, and the rear board 112 are laminated and cooperate with each other. The thickness of the shaping board 11 is determined by the thickness and / or quantity of the gasket 111, and the top board 110 and the rear board 112 are detachably connected. During actual use, only by changing the thickness and / or quantity of the gasket 111 can the thickness of the shaping board 11 be changed, and there is no need to replace the entire shaping board 11, which is applicable to the pressing operation of electric cores with different thicknesses, is beneficial to meeting the formation requirements of electric cores with different thicknesses, and reduces the production costs of electric cores with different specifications.

[0040] Wherein, when the top board 110 is connected to the rear board 112, it can be connected by bolts between the top board 110 and the rear board 112, or can be connected by snap-fitting a retractable snap and a slot; between the top board 110 and the rear board 112, a gasket 111 is provided, and the thickness of the shaping board 11 changes with the thickness and / or quantity of the gasket 111. Specifically, the gasket 111 can be a single gasket 111 with various different thicknesses separately arranged between the top board 110 and the rear board 112, or a combination of gaskets 111 with the same thickness or a combination of gaskets 111 with different thicknesses arranged between the top board 110 and the rear board 112. When setting, the gasket 111 can be bonded, abutted, or fixed between the top board 110 and the rear board 112 by bolts.

[0041] Optionally, as Figure 4 , Figure 5 , Figure 10 shown, on the bottoms of both the main board 10 and the shaping board 11, a supporting platform is provided. The supporting platform includes a first supporting platform 1100 provided at the bottom of the top board 110, a second supporting platform 1120 provided at the bottom of the rear board 112, and a third supporting platform 100 provided on the main board 10 and opposite to the first supporting platform 1100 and the second supporting platform 1120. The bottom surface 1100c of the first supporting platform abuts against the top surface 1120d of the second supporting platform, and the bottom surface 111e of the gasket abuts against the top surface 1120d of the second supporting platform.

[0042] During the formation process, the battery cell needs to be placed between the first bracket 1100 and the third bracket 100. The first bracket 1100 and the third bracket 100 are spaced apart and can support the soft-pack battery cell from the bottom. In the loosened state, the first bracket 1100 and the third bracket 100 ensure that the battery cell does not fall, and because the first bracket 1100 and the third bracket 100 are spaced apart, it can be ensured that the edge of the battery cell is not pinched in the compressed state; the second bracket 1120 is mainly used to support the first bracket 1100 and keep a certain distance from the edge of the back plate 112 to form a structure for clamping with the slide groove 101. When the first bracket 1100 faces the first bracket 1100 and the third bracket 100 faces the third bracket 100, the battery cell needs to be placed between the two first brackets 1100 and the two third brackets 100, respectively, and arranged alternately with each other. It can be understood that when the first tray 1100 and the third tray 100 are arranged to face each other, the first tray 1100 and the third tray 100 have the same height, which is used to prevent the battery cells from tilting when placing the battery cells. When the first tray 1100 faces the first tray 1100 and the third tray 100 faces the third tray 100, the first tray 1100 and the third tray 100 can have different heights, so that the pressurizing device of the present application can pressurize battery cells of different heights at the same time.

[0043] Optional, see Figures 2 to 4 The bottom of the main board 10 and the replacement board are both provided with avoidance openings 11b, and the avoidance openings 11b separate the support platform to form a structure in which the support platform and the avoidance openings 11b are alternately arranged.

[0044] Specifically, when the battery cell completes the pressurization process or needs to be replaced, the battery cell needs to be taken out from the pressurization device. In actual use, direct clamping may easily damage the battery cell. At this time, a lifting mechanism is required to lift the battery cell to facilitate the removal of the battery cell. In this process, the avoidance port 11b is mainly used to avoid the lifting mechanism to ensure that the battery cell can be lifted by the lifting mechanism.

[0045] Optional, see Figures 2 to 4 Combined with Figure 9 The main board 10 is provided with a slide groove 101 formed by a U-shaped card groove 1011 and a middle groove 1012 arranged opposite to each other on both sides, and the slide groove 101 is used to slide into the shape-changing plate 11 from the side, wherein the U-shaped card groove 1011 is used to engage with the shape-changing plate 11. The working surfaces of the main board 10 and the shape-changing plate 11 are both provided with a deformation layer 12 that can be deformed under the action of extrusion to clamp the soft-pack battery.

[0046] Specifically, the sliding groove 101 can allow the annular plate 11 to slide in from the side, and the U-shaped card slots 1011 with opposite-notch openings on both sides of the sliding groove 101 can clamp the rear plate 112 of the shape-changing plate 11. The deformation layer 12 can be foamed silica gel, which has high and low temperature resistance, high flame retardancy, and can play a role in buffering and shock absorption. When the battery is pressurized, it can also absorb a certain amount of cumulative tolerance of the battery arrangement, so that when the soft-pack battery cell is pressurized, it will deform and clamp the battery cell under the extrusion between the main board 10 and the shape-changing plate 11, avoiding damage to the soft-pack battery cell due to the excessive hardness of the working surfaces of the main board 10 and the shape-changing plate 11.

[0047] Optionally, please refer to Figure 4 , mounting holes 102 are provided above the main board 10, and mounting openings 1121 adapted to the mounting holes 102 are provided above the shape-changing plate 11. The main board 10 and the shape-changing plate 11 are clamped by bolts passing through the mounting holes 102 and the mounting openings 1121 to fasten the entire shape-changing plate 11 installed in the sliding groove 101 to the main board 10. A plurality of mutually adapted threaded holes 11a are provided above and below the top plate 110, the gasket 111 and the shape-changing plate 11, and the threaded holes 11a are used to cooperate with bolts to stack and fix the top plate 110, the gasket 111 and the shape-changing plate 11.

[0048] Specifically, when the shape-changing plate 11 is connected to the main board 10 through the sliding groove 101, it is in a slidable and wobbling state and is likely to fall off during use and needs to be fastened. Mounting holes 102 are provided above the main board 10, which can cooperate with fasteners such as bolts to fix the shape-changing plate 11 on the main board 10. It can be understood that before the shape-changing plate 11 is installed on the main board 10, the top plate 110, the gasket 111 and the shape-changing plate 11 need to be fixed as a whole first, and mutually adapted threaded holes 11a need to be provided above and below the three, and the three can be stacked and fixed by fasteners such as bolts.

[0049] Optionally, as Figures 4 to 8As shown in the figure, sliding members 103 for connecting with other components are arranged on both sides above the main board 10. A guiding member 104 is further arranged at the bottom of the main board 10, and the guiding member 104 is provided with a sliding hole for sliding connection. Specifically, the sliding member 103 is used to connect with other components to ensure that the main board 10 can slide on other components. When used for pressing a soft-pack battery cell, it ensures that the main board 10 can slide and cooperate with other components to squeeze the battery cell. Specifically, the sliding member 103 can be a sliding hole, a sliding block or other reasonable structures. When the sliding member 103 is a sliding hole, it can cooperate with a sliding rod or a guiding rod for sliding. When the sliding member 103 is a sliding block, it can cooperate with structures such as a sliding groove 101 or a sliding seat for sliding. The guiding member 104 can also be a groove structure with a downward notch at the bottom, and it can also realize the functions of guiding and sliding when cooperating with a sliding rod or a sliding block. More preferably, the guiding member 104 is provided with a guiding hole 1040, and the cooperation between the guiding hole 1040 and the sliding rod can realize the sliding of the main board 10 along the direction of the sliding rod. The guiding holes 1040 at the bottom of the main board 10 cooperate with the sliding members 103 on both sides above the main board 10 to form a stable triangular sliding and pressing structure on the moving surface. When used for pressing the battery cell, it is more conducive to evenly dispersing the pressure on the pressing surface during pressing, and the pressing process is more stable.

[0050] Optionally, the gasket 111 is made of polymer material. Specifically, it can be foamed silica gel. Foamed silica gel has high and low temperature resistance, high flame retardancy and can play a role in buffering and shock absorption. When used for battery pressing, it can also absorb a certain amount of cumulative tolerance of battery arrangement.

[0051] Please refer to Figures 6 to 8 , a pressing device for a soft-pack battery provided by the present utility model further includes:

[0052] A tray frame body 2, the tray frame body 2 is provided with a first end plate 20, a second end plate 21 and a plurality of sliding guide rods 22, and both ends of the plurality of sliding guide rods 22 are detachably connected to the first end plate 20 and the second end plate 21 respectively;

[0053] A pressing plate 23, the pressing plate 23 is slidably connected to the sliding guide rods 22 and can relatively slide, and is further provided with a pressing rod 230 for movably connecting with the first end plate 20;

[0054] The sliding members 103 arranged on both sides above the plurality of main boards 10 and the guiding holes 1040 of the guiding members 104 at the bottom of the main boards 10 are respectively slidably connected to the sliding guide rods 22 and are located between the pressing plate 23 and the second end plate 21.

[0055] Optionally, the pressurizing device further includes a plurality of flexible connectors 24. The plurality of flexible connectors 24 are used to connect with the plurality of main boards 10, and both ends of the flexible connectors are fixedly connected to the second end plate 21 and the pressure plate 23 respectively. Fixing members 1030 for fixing the flexible connectors 24 are arranged on the outer sides of the sliding members 103 and the guiding members 104. The flexible connectors 24 are connected to the sliding members 103 on both sides above the plurality of main boards 10 through the fixing members 1030, and the flexible connectors 24 are connected to both sides of the guiding members 104 at the bottom of the plurality of main boards 10 through the fixing members 1030.

[0056] As can be seen from the above, when the pressurizing device for soft-pack batteries provided by the present invention is specifically used to pressurize the batteries, as many batteries as possible need to be pressurized at one time. Therefore, both ends of a plurality of sliding guide rods 22 are detachably connected to the first end plate 20 and the second end plate 21 respectively to form a tray frame body 2 for pressurizing a plurality of batteries at one time. Specifically, when both ends of the sliding guide rod 22 are connected to the first end plate 20 and the second end plate 21 respectively, it can be a bolt matching with a screw hole. Specifically, there are three sliding guide rods 22, which are respectively at the upper two sides and the lower middle position of the first end plate 20 and the second end plate 21, and are used to cooperate with the two sliding members 103 above the main board 10 and the guide holes 1040 below the main board 10, which is beneficial to the uniform force during the battery pressurizing process and ensures the stability of the battery pressurizing process. The pressure plate 23 is used to provide power for squeezing the battery and is slidably connected to the sliding guide rod 22 and can relatively slide, ensuring a continuous pressurizing pressure during the process of pressurizing the battery. Specifically, when the pressure plate 23 is connected to the sliding guide rod 22, it can be a sliding hole slidingly connected to the sliding guide rod 22; the pressure rod 230 is used to contact an external power source to provide a continuous pressure source for the pressure plate 23.

[0057] Through the connection between the sliding members 103 arranged on both sides above the main board 10 and the sliding guide rod 22, and the connection between the guide holes 1040 below the main board 10 and the sliding guide rod 22, the main board 10 can be arranged on the tray frame body 2 by means of the sliding guide rod 22, and the shaping plate 11 formed by laminating the top plate 110, the gasket 111 and the rear plate 112 is fixedly connected to the main board 10. It can be understood that in the prior art, when the battery is pressurized and there is a need for shaping, the entire main board 10 needs to be taken out, and then the shaping plate 11 needs to be taken out and replaced with a shaping plate 11 with a thickness that meets the requirements. However, the price of the whole shaping plate 11 is relatively high, and different types of batteries need to be equipped with different types of shaping plates 11, and its use and maintenance costs are high, and the production cycle is long. While for the pressurizing device for soft-pack pressurization provided by the present invention, in the above process, only the gasket 111 in the shaping plate 11 needs to be replaced to meet the pressurizing requirements for adapting to different types of batteries.

[0058] The above-mentioned tray frame 2 is connected and fixed by the first end plate 20 and the second end plate 21 on both sides through the sliding guide rod 22. When connected, it can be connected by threaded connection. Multiple main boards 10 are slidably connected with the sliding guide rod 22 through the sliding member 103, and are located between the pressure plate 23 and the second end plate 21, and are used to carry multiple soft-pack battery cells. The pressure plate 23 and the second end plate 21 are arranged to facilitate pressurization; wherein, the main board 10 is connected to the sliding guide rod 22, and is also used to realize the extrusion function; the pressure plate 23 provides an extrusion force through the pressure rod 230 to extrude the main board 10, thereby realizing the purpose of pressurizing the battery cells.

[0059] Specifically, the fixing member 1030 can be a combination of bolts and nuts, or a pin or a block detachably connected to the sliding member 103; the flexible connecting member 24 can be a belt or a flexible chain, which is used to maintain the structural stability of the entire mainboard 10 and ensure that the battery cell does not slide out or fall from the side during pressurization or placement.

[0060] Optional, see Figure 8 One end of the pressure rod 230 is detachably connected to the force center of the pressure plate 23, and a bearing is provided at the force center of the first end plate 20. The pressure rod 230 is slidably connected to the first end plate 20 through the bearing.

[0061] Specifically, when the pressure rod 230 is connected to the pressure plate 23, it can be a bolt-matched threaded connection, which is conducive to the installation of the pressure rod 230 and the pressure plate 23 on the tray frame 2, and is convenient for later maintenance or replacement; wherein, the pressure rod 230 is arranged at the force center of the working surface of the pressure plate 23 and passes through the force center of the first end plate 20, which is conducive to uniform force on the extrusion surface of the battery cell when pressurized.

[0062] Optional, such as Figures 7 to 9 As shown, the tray frame 2 also includes a plurality of brackets 25 located at the bottom, and both ends of the plurality of brackets 25 are detachably connected to the bottom of the first end plate 20 and the second end plate 21, respectively. The plurality of brackets 25 are distributed side by side at the bottom, wherein the brackets 25 located in the middle are slidably abutted against the plurality of main boards 10, respectively.

[0063] The bracket 25 can further stabilize the overall structure of the tray frame 2, and is used to carry the entire mainboard 10, the change plate 11, the battery cells, and is used to cooperate with the assembly line or be installed with other equipment.

[0064] Optional, please continue to Figures 6 to 8 Combined with Figure 11 , Figure 12The pressurizing device for soft-pack batteries provided by the utility model also includes a first partition 26 and a second partition 27. The first partition 26 and the second partition 27 both include a U-shaped slot 1011 and a sliding member 103. A threaded through hole is provided in the U-shaped slot 1011; the first partition 26 is fixedly connected to the pressurizing plate 23 by bolts and the threaded through hole; the second partition 27 is fixedly connected to the second end plate 21 by bolts and the threaded through hole.

[0065] In the above embodiment, the first partition 26 is located between the pressure plate 23 and the second end plate 21 and is fixedly connected to the pressure plate 23 by bolts and threads, and the second partition 27 is located between the pressure plate 23 and the second end plate 21 and is fixedly connected to the second end plate 21 by bolts and threads. It can be understood that since the bottom of the working surface of the main board 10 and the shape-changing plate 11 are respectively provided with a first support 1100 and a third support 100 for clamping the battery cells, if the pressure plate 23 directly abuts against the main board 10, since the second end plate 21 and the pressure plate 23 are both flat, and there is a third support 100 on the main board 10 and a first support 1100 on the shape-changing plate 11, the battery cells cannot be clamped between the main board 10 and the second end plate 21 and between the main board 10 and the pressure plate, and when pressurized, the third support 100 on the main board 10 and the shape-changing plate 11 When the first drag platform 1100 on the plate contacts and pressurizes the second end plate 21 and the pressure plate 23 respectively, uneven pressure will result, which will lead to crushing of the battery cells or poor pressurization effect. Therefore, the first partition 26 and the second partition 27 are respectively adapted to the pressure plate 23 and the second end plate 21 at both ends. The U-shaped slot 1011 set on the first partition 26 and the second partition 27 is used to install the change plate 11, so that the battery cells can be clamped between the first partition 26 and the adjacent main board 10, and the battery cells can be clamped between the second partition 27 and the adjacent main board 10.

[0066] In order to have a more thorough and comprehensive understanding of the disclosed content of the utility model, the principle thereof is further explained below in combination with the usage method.

[0067] See also Figures 2 to 8 , in actual use:

[0068] First, according to the specifications of the soft-pack battery cells that need to be pressurized, the gaskets 111 of matching thickness and / or quantity are bonded to each other, and then installed on the non-working surface of the top plate 110 or the non-installation surface of the rear plate 112 to form a stacked structure, and then the top plate 110, the gasket 111 and the rear plate 112 are fixedly connected by bolts. At this time, the gasket 111 is located between the top plate 110 and the rear plate 112 to form a shape-changing plate 11. For details, please refer to Figure 5 .

[0069] Secondly, the above-mentioned shape-changing plate 11 is initially installed on the main board 10 through the sliding groove 101, and then the main board 10 and the shape-changing plate 11 are fastened through bolts and the fastening hole mating installation port 1121. Specifically, please refer to Figure 4 ; Then, multiple main boards 10 are installed on the tray frame 2 through the sliding members 103 and the sliding guide rails, and the guide holes 1040 and the sliding guide rails. Specifically, as Figures 6 to 8 shown.

[0070] It should be noted that when the above-mentioned multiple main boards 10 are installed on the tray frame 2 through the sliding members 103 and the sliding guide rails, they can be arranged in opposite or reverse directions.

[0071] Again, the soft-pack battery cells with air bags are sequentially placed on the carrier platform between the main board 10 and the shape-changing plate 11. At this time, as Figure 8 shown: The battery cells are clamped between the two main boards 10 and the shape-changing plate 11, and the bottoms are respectively supported by the first carrier platforms 1100 and the third carrier platforms 100 on both sides. After being pressed by the pressing plate 23, after the pressing of the battery cells is completed, the lifting mechanism of the assembly line or the equipment installed through the bracket 25 by the pressing device lifts all the battery cells, and the battery cells are taken out.

[0072] Finally, in the above process, when it is necessary to replace the soft-pack battery cells of different specifications for pressing, only the corresponding gaskets 111 with different thicknesses and / or quantities need to be replaced. The specific operation is as follows: Place the main board 10 on a horizontal plane, then remove the bolts fixed through the mounting holes 102 and the mounting port 1121, remove the shape-changing plate 11 and disassemble the top plate 110 and the rear plate 112, and then increase or decrease or replace the corresponding gaskets 111 with different thicknesses and quantities as a whole; After the replacement of the gaskets 111 is completed, then fix the top plate 110, the gaskets 111 and the rear plate 112 to form a shape-changing plate 11 with a new thickness, and then install the shape-changing plate 11 on the main board 10 and fasten the shape-changing plate 11 through bolts in cooperation with the mounting holes 102 and the mounting port 1121 to complete the replacement.

[0073] In summary, the pressure applying device for soft-pack batteries provided by the present utility model includes a main board 10 and a shaping board 11 formed by laminating a top board 110, a gasket 111, and a rear board 112. Among them, the thickness of the shaping board 11 is adjusted by the thickness and / or quantity of the gasket 111, and the main board 10 is detachably connected to the shaping board 11. This technical solution optimizes the traditional integral shaping board 11 into a structure in which the top board 110, the gasket 111, and the rear board 112 are laminated and cooperate with each other. The thickness of the shaping board 11 is determined by the thickness and / or quantity of the gasket 111, and the top board 110 and the rear board 112 are detachably connected. By changing the thickness and / or quantity of the gasket 111, the thickness of the shaping board 11 is changed, which is applicable to the pressure applying operation of electric cores with different thicknesses, is beneficial to meeting the formation requirements of electric cores with different thicknesses, and reduces the production costs of electric cores with different specifications. A pressure applying device for soft-pack batteries according to an embodiment of the present application further includes a tray frame body 2. The tray frame body 2 is provided with a first end plate 20, a second end plate 21, and a plurality of sliding guide rods 22. The two ends of the plurality of sliding guide rods 22 are respectively detachably connected to the first end plate 20 and the second end plate 21; a pressure applying plate 23, the pressure applying plate 23 is coupled to the sliding guide rods 22 and can slide relatively, and is further provided with a pressure applying rod 230 for movably connecting to the first end plate 20; sliding members 103 provided on both sides above the plurality of main boards 10 and guide holes 1040 of bottom guides 104 of the main boards 10 are respectively slidably connected to the sliding guide rods 22 and are located between the pressure applying plate 23 and the second end plate 21; and a plurality of flexible connectors 24, the two ends of the plurality of flexible connectors 24 are respectively fixedly connected to the second end plate 21 and the pressure applying plate 23; fixing members 1030 for fixing the flexible connectors 24 are provided on the outer sides of the sliding members 103 and the guides 104. The flexible connectors 24 are connected to the sliding members 103 on both sides above the plurality of main boards 10 through the fixing members 1030, and the flexible connectors 24 are connected to both sides of the bottom guides 104 of the plurality of main boards 10 through the fixing members 1030. It can be understood that this pressure applying device can have all the technical features and beneficial effects of the above-mentioned shaping board 11, which will not be elaborated here.

[0074] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present utility model by the same token.

Claims

1. A pressurizing device for a soft pack battery, characterized in that: include: A main board and a shape-changing plate formed by stacking a top board, a gasket and a back board, wherein the thickness of the shape-changing plate is adjusted by the thickness and / or number of the gaskets, and the main board and the shape-changing plate are detachably connected; The bottom of the main board and the shape-changing board are both provided with supports, and the supports include a first support provided at the bottom of the top board, a second support provided at the bottom of the rear board, and a third support provided at the main board and opposite to the first and second supports. The bottom of the first support abuts against the top surface of the second support, and the bottom of the gasket abuts against the top surface of the second support.

2. The pressurizing device for soft pack batteries according to claim 1, characterized in that: The bottoms of the main board and the shape-changing board are both provided with avoidance openings, and the avoidance openings separate the supporting platform to form a structure in which the supporting platform and the avoidance openings are arranged alternately.

3. The pressurizing device for soft pack batteries according to claim 1, characterized in that: The main board is provided with a slide groove formed by a U-shaped card groove arranged opposite to each other on both sides and a middle groove, and the slide groove is used to slide into the shape-changing plate from the side, wherein the U-shaped card groove is used to be connected with the shape-changing plate.

4. The pressurizing device for soft pack batteries according to claim 1, characterized in that: The working surfaces of the main board and the shape-changing plate are both provided with deformation layers that can be deformed under extrusion to clamp the soft-pack battery.

5. The pressurizing device for soft pack batteries according to claim 1, characterized in that: A mounting hole is arranged above the main board, a mounting opening matched with the mounting hole is arranged above the shape-changing plate, and the main board and the shape-changing plate are connected by bolts passing through the mounting hole and the mounting opening.

6. The pressurizing device for soft pack batteries according to claim 1, characterized in that: A guide piece is also provided at the bottom of the main board, and the guide piece is provided with a guide hole for sliding connection.

7. The pressurizing device for soft pack batteries according to claim 1, characterized in that: Also includes: A tray frame, wherein the tray frame is provided with a first end plate, a second end plate and a plurality of sliding guide rods, and two ends of the plurality of sliding guide rods are detachably connected to the first end plate and the second end plate respectively; A pressure plate, the pressure plate is slidably connected to the sliding guide rod so as to be able to slide relatively, and is also provided with a pressure rod for being movably connected to the first end plate; The sliding members arranged on both sides above the plurality of main boards and the guide holes of the bottom guide members of the main boards are respectively slidably connected with the sliding guide rods and are located between the pressure plate and the second end plate.

8. The pressurizing device for soft pack batteries according to claim 7, characterized in that: Also includes: A plurality of flexible connectors, wherein the plurality of flexible connectors are used to connect with a plurality of main boards and the two ends of the flexible connectors are respectively fixedly connected with the second end plate and the pressure plate; The outer sides of the sliding member and the guide member are provided with fixing members for fixing the flexible connecting member. The flexible connecting member is connected to the sliding members on both sides above the multiple main boards through the fixing members. The flexible connecting member is connected to both sides of the guide members at the bottom of the multiple main boards through the fixing members.

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