Battery pack disassembling device

Abstract

The utility model relates to the field of battery recovery, particularly provides a battery pack disassembling device, and aims to solve the problem of low disassembling efficiency of an existing CTP battery pack. In order to achieve the purpose, the disassembling device for the battery pack comprises a frame body used for bearing the battery pack; the push plate is arranged on one side of the frame body, and the push plate is used for applying thrust towards the battery pack to a water cooling plate of the battery pack in the Z direction; and the pressing plate and the push plate are located on the two sides of the battery pack in the Z direction correspondingly, and the pressing plate is attached to a box frame of the battery pack in the Z direction and used for preventing the box frame of the battery pack from moving in the Z direction. According to the utility model, the battery pack is separated from the water cooling plate and the box body frame in an upward pushing manner, so that compared with other disassembling devices, freezing time, heating time or dispergator reaction time does not need to be reserved, the battery core separation efficiency is improved, and the occupied area for disassembling and the disassembling cost are reduced; according to the utility model, the push-out mode enables the battery cell to be disassembled in a large scale, and the executability is high.

Description

Technical Field

[0001] The utility model relates to the field of battery recycling, and specifically provides a battery pack disassembly device. Background Art

[0002] In recent years, the battery pack with CTP structure has emerged with its own advantages and has been increasingly applied and developed. Blcok (a battery block composed of different numbers of battery cells stacked together, and several battery blocks are integrated into a battery pack), CTP (Cell to Pack, a power battery pack composed of no module or a few large battery cells blcok) technology simplifies the original manufacturing process of battery cell → module → whole pack to battery cell → whole pack, removes the intermediate state of the module, and fixes the battery cell on the water cooling plate with glue and applies a pre-tightening force to the battery cell through the shell frame to form a battery pack with interference fit. This technology has no traditional end plates and bolts, saves parts, improves the battery pack volume utilization and production efficiency, and can significantly reduce the weight of the whole pack, thereby increasing energy density and battery life.

[0003] In order to efficiently recycle the cells of CTP battery packs, it is necessary to carry out fine disassembly of retired batteries of this type. Since the cells of CTP battery packs adopt an adhesive structure, traditional disassembly methods include freezing disassembly, mechanical cutting and immersion in a dissolving agent, but there are some problems with traditional disassembly methods. The freezing vibration disassembly method requires first freezing the entire battery pack for a long time to make the glue brittle, and then vibrating the battery pack at different magnitudes and frequencies to crack the glue between the bottom of the cell and the water-cooled plate, and then manually removing the cell. However, the freezing vibration time is too long, resulting in low disassembly efficiency, and the freezing warehouse and vibration table are expensive to purchase and occupy a large area. They can only be used for a single battery pack at a time and cannot be scaled up. In addition, the freezing vibration disassembly method is easy to damage the internal structure of the cell, and it cannot completely guarantee that all glue layers can be cracked, making disassembly difficult.

[0004] Mechanical cutting, that is, using laser or water cutting equipment to separate the cell block area, requires high cutting precision and is extremely difficult to implement. Sparks, high temperatures or water and flying debris generated by cutting can easily damage the cell and pose safety risks. Disassembly by immersion in a disassembly agent, that is, applying or soaking the disassembly agent on the adhesive area to dissolve the adhesive so that the cell can be separated and disassembled. However, the disassembly agent disassembly method requires sufficient time for the disassembly agent to react with the adhesive, resulting in low disassembly efficiency and the need to handle waste liquid and waste. This disassembly method may cause certain damage or pollution to the cell and other components.

[0005] Accordingly, the art needs a new technical solution to solve the above problems. Utility Model Content

[0006] The utility model aims to solve the above technical problems, that is, to solve the problem of low disassembly efficiency of existing CTP battery packs. To this end, the utility model provides a battery pack disassembly device, including: a frame, the frame is used to carry the battery pack; a push plate, the push plate is arranged on one side of the frame, the push plate is used to apply a thrust to the water cooling plate of the battery pack toward the battery group along the Z direction; a pressure plate, the pressure plate and the push plate are respectively located on both sides of the battery pack along the Z direction, the pressure plate is in contact with the box frame of the battery pack along the Z direction, and is used to prevent the box frame of the battery pack from moving along the Z direction.

[0007] In the above-mentioned specific embodiment of the battery pack disassembly device, the disassembly device further includes: a pulling assembly, which is located on the same side of the pressure plate along the Z direction and is used to apply a force to the battery pack away from the water cooling plate along the Z direction.

[0008] In the above-mentioned specific embodiment of the battery pack disassembly device, a positioning pin is arranged on the frame along the Z direction, and the positioning pin is used to be inserted into the positioning hole of the battery pack along the Z direction.

[0009] In the above specific embodiment of the battery pack disassembly device, the disassembly device further includes: a first sliding bar, and the push plate is slidably disposed on the first sliding bar and slides along the first sliding bar.

[0010] In the above-mentioned specific embodiment of the battery pack disassembly device, the disassembly device also includes: a movable seat, a first slide bar is arranged on the movable seat; a second slide bar, the movable seat is arranged on the second slide bar and slides along the second slide bar; the first slide bar is arranged along the X direction, and the second slide bar is arranged along the Y direction; or the first slide bar is arranged along the Y direction, and the second slide bar is arranged along the X direction.

[0011] In the above specific embodiment of the battery pack disassembly device, the disassembly device further includes: a driving device, and an output end of the driving device is connected to the push plate.

[0012] In the above-mentioned specific embodiment of the battery pack disassembly device, the push plate includes an edge push plate and a middle push plate, and the driving device drives the edge push plate and / or the middle push plate.

[0013] In the above-mentioned specific embodiment of the battery pack disassembly device, the edge push plates are located on both sides of the middle push plate along the Y direction and / or the X direction; and / or the edge push plates are arranged along the circumference of the middle push plate.

[0014] In the above-mentioned specific embodiment of the battery pack disassembly device, a pressing block is provided on the side of the pressing plate facing the battery pack, the pressing block is fitted with the box frame of the battery pack, and the edge of the pressing block does not exceed the edge of the box frame of the battery pack.

[0015] In the above-mentioned specific embodiment of the battery pack disassembly device, the pulling assembly has a vacuum suction cup, and the vacuum suction cup is used to apply a force to the battery pack away from the water cooling plate along the Z direction.

[0016] Under the condition of adopting the above-mentioned technical scheme, the utility model can solve the problem of low disassembly efficiency of the existing CTP battery pack. The utility model separates the battery pack from the water-cooled plate and the box frame by an upward pushing method. Compared with other methods, there is no need to reserve freezing time, heating time or degumming agent reaction time, thereby improving the efficiency of battery cell separation; there is no need to purchase freezing bins, heating bins or high-precision cutting equipment, thereby reducing the floor space occupied by disassembly, and there is no need to treat wastewater, thereby reducing the disassembly cost; the pushing method in the utility model can simultaneously push out several battery packs in a battery pack, and simultaneously disassemble several battery packs, so that the battery cells can be disassembled on a large scale, and this method is suitable for different CTP battery packs, has good compatibility and high executability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0018] Figure 1 It is a schematic diagram of the structure of the battery pack in this application at a certain viewing angle;

[0019] Figure 2 is a schematic diagram of the structure of the battery pack in the present application at a certain viewing angle, wherein the side structural adhesive and the bottom structural adhesive are shown;

[0020] Figure 3 is a schematic diagram of the structure of the battery pack disassembly device in this application;

[0021] Figure 4 is a top view of the frame of the present application, showing the positioning pins;

[0022] Figure 5 is a top view of the pressing plate in the present application;

[0023] Figure 6 is a side view of the press plate of the present application, showing the press blocks.

[0024] Figure 7 is a schematic diagram of the structure of the push plate in the present application, which shows the edge push plate and the middle push plate;

[0025] Figure 8 It is a structural schematic diagram of the driving device in this application that only drives the middle push plate.

[0026] In the figure: 1. battery pack, 2. bottom guard plate, 3. box frame, 4. side structural adhesive, 5. battery pack cover, 6. water cooling plate, 7. bottom structural adhesive, 8. longitudinal beam, 9. cross beam, 10. shell, 11. frame, 12. push plate, 13. pressure plate, 14. positioning pin, 15. moving seat, 16. first slide bar, 17. second slide bar, 18. driving device, 19. pressure block, 20. edge push plate, 21. middle push plate. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not used to limit the protection scope of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0028] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the relevant devices or components must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, ordinal numbers such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "fixed", "installed" and "connected" 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. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0030] Furthermore, in order to more clearly demonstrate the core technical solution of the present invention, the description of other known structures of the battery pack is omitted in the following description. However, this omission is only for the convenience of description and does not mean that the battery pack can be without these structures.

[0031] The utility model proposes a battery pack disassembly device, the structure of the battery pack is as follows Figure 1-2As shown, the battery pack includes: a battery pack 1, which is composed of a plurality of cells; a box frame 3, which is arranged around the battery pack 1, and a side structural glue 4 is provided between the box frame 3 and the battery pack 1; a battery pack upper cover 5, which is arranged above the battery pack 1; a water-cooling plate 6, which is arranged at the bottom of the battery pack 1, and a bottom structural glue 7 is provided between the water-cooling plate 6 and the battery pack 1; in order to ensure effective bonding between the water-cooling plate 6 and the battery pack 1, a sufficient amount of structural glue will be applied between the water-cooling plate 6 and the bottom of the battery pack 1. When bonding between the water-cooling plate 6 and the bottom of the battery pack 1, a part of the structural glue is squeezed between the battery pack 1 and the box frame 3 to form the side structural glue 4, so the bonding area of ​​the side structural glue 4 is relatively small. The battery pack also includes a bottom guard plate 2, which is arranged at the bottom of the water-cooling plate 6 to resist stone impact and protect the battery pack. The battery pack also includes battery pack components, such as high-voltage connecting copper bars, low-voltage wiring harnesses, BMS, high-voltage distribution units, and accessories such as bolts and nuts. In the figure, X represents the width direction of the battery pack, Y represents the length direction of the battery pack, and Z represents the height direction of the battery pack.

[0032] Battery pack disassembly device, such as Figure 3-5 As shown, it includes: a frame 11, the battery pack is placed on the frame 11, and the frame 11 is used to carry the battery pack; a push plate 12, the push plate 12 is arranged on one side of the frame 11, and the push plate 12 is used to apply a thrust toward the battery group 1 along the Z direction to the water-cooling plate 6 of the battery pack; a pressure plate 13, the pressure plate 13 and the push plate 12 are respectively located on both sides of the battery pack along the Z direction, and the pressure plate 13 is in contact with the box frame 3 of the battery pack along the Z direction.

[0033] In this embodiment, the battery pack that has been disassembled to only the battery pack 1, the box frame 3 and the water-cooling plate 6 is placed on the frame 11, and the push plate 12 pushes the water-cooling plate 6 along the Z direction to push the battery pack 1 away from the water-cooling plate 6 along the Z direction; during the pushing process, the water-cooling plate 6 begins to partially deform, the position of the battery pack 1 gradually rises, and a part of the bottom structural glue 7 and the side structural glue 4 will break and fail; when the displacement of the push plate 12 along the Z direction reaches the highest point, the fracture failure area of ​​the bottom structural glue 7 is the largest, and the bonding strength of the water-cooling plate 6 to the battery pack 1 is the smallest, and then the battery pack 1 can be taken out along the Z direction. After the battery pack 1 is disassembled, the battery pack 1 can be split into several cells. In order to prevent the box frame 3 of the battery pack from moving along the Z direction and affecting the disassembly of the battery pack during the entire pushing process, the pressing plate 13 is used to resist the box frame.

[0034] In this embodiment, in order to solve the problem of low disassembly efficiency of the existing CTP battery pack, an upward pushing method is adopted to separate the battery group 1 from the water cooling plate 6 and the box frame 3. Compared with other methods, there is no need to reserve freezing time, heating time or degumming agent reaction time, which improves the efficiency of battery cell separation; there is no need to purchase freezing bins, heating bins or high-precision cutting equipment, which reduces the floor space required for disassembly, does not require wastewater treatment, and reduces the disassembly cost; the pushing method in the utility model can simultaneously push out several battery packs 1 in a battery pack, and disassemble several battery packs at the same time, so that the battery cells can be disassembled on a large scale, and this method is suitable for different CTP battery packs, has good compatibility, and is highly executable.

[0035] After pre-processing the battery pack, only the battery group 1, the box frame 3 and the water-cooling plate 6 are left in the battery pack. The pre-processing includes removing the upper cover 5 of the battery pack, removing the bottom guard plate 2, removing the constraints on the upper part of the battery group 1 and the lower part of the water-cooling plate 6, and removing the battery pack components. The pre-processing also includes the following steps: inspecting and cleaning the appearance of the battery pack; obtaining battery pack information, such as battery type, battery voltage, nominal capacity / quality and battery manufacturer, so as to evaluate the state of the battery cells and facilitate screening and classification after the battery cells are disassembled; in order to avoid safety risks caused by excessive battery cell power during disassembly, the battery pack is discharged before disassembly. Different discharge voltages can be selected according to the previously obtained battery pack information to put the battery cell power in a safe range before disassembly, while avoiding deep over-discharge to damage the battery cell performance; emptying the coolant in the battery pack to prevent leakage during disassembly and leakage of liquid and injury.

[0036] It should be noted that, in this embodiment, the water-cooling plate 6 of the battery pack is preferably placed at the bottom along the Z direction, and the battery pack 1 is pushed upward, so as to prevent the battery pack 1 from falling after being pushed out; in addition, the water-cooling plate 6 of the battery pack can also be placed at the top along the Z direction, and the battery pack 1 can be pushed downward, so that the gravity of the battery pack 1 itself can also provide a certain pulling force for the disassembly process.

[0037] Furthermore, the disassembly device also includes: a pulling assembly, which is located on the same side of the pressure plate 13 along the Z direction. The thrust applied by the push plate 12 and the effective area of ​​the water-cooling plate 6 are the pushing area. When the battery pack 1 is pushed to the top, there will still be a part of the bottom structural adhesive 7 that has not been broken within the pushing area. It is necessary to use the pulling assembly to apply a force away from the water-cooling plate to the battery pack 1 along the Z direction to pull off the bottom structural adhesive 7 that has not failed and take out the battery pack 1.

[0038] The pulling assembly has a vacuum suction cup, which is used to apply a force along the Z direction to the battery pack away from the water cooling plate.

[0039] Further, if Figure 4As shown, a positioning pin 14 is provided on the frame 11 along the Z direction, and the positioning pin 14 is used to be inserted into the positioning hole of the battery pack along the Z direction. The positioning pin 14 can limit the movement of the battery pack along the Y direction and along the X direction. The battery pack is placed on the receiving platform of the frame 11 along the Z direction, and the receiving platform is located on the same side as the push plate 12 along the Z direction. The receiving platform and the pressure plate 13 jointly limit the movement of the battery pack along the Z direction.

[0040] like Figure 1-2 As shown, the box frame 3 includes a shell 10, a longitudinal beam 8 arranged in the shell 10 along the Y direction of the battery pack, and a cross beam 9 arranged in the shell 10 along the X direction of the battery pack. The cross beam 9 and the longitudinal beam 8 form a plurality of battery compartments, and the battery packs 1 are placed in the battery compartments. When disassembling the battery pack, the water cooling plates 6 at the bottom of the battery compartment can be pushed out in sequence to push out the battery packs 1 in sequence, or the water cooling plates 6 at the bottom of several battery compartments can be pushed out at the same time to push out several battery packs 1 at the same time. Those skilled in the art can adjust the number of battery packs 1 pushed at the same time according to actual conditions, which does not exceed the protection scope of the present utility model.

[0041] Furthermore, in order to be able to disassemble the battery packs 1 in different battery compartments, such as Figure 3 As shown, the disassembly device also includes: a first slide bar 16, and the push plate 12 is slidably set on the first slide bar 16. After sliding along the first slide bar 16, the push plate 12 can slide along the first slide bar 16 to the side of the water cooling plate 6 of another battery pack 1 that needs to be disassembled after disassembling a certain battery pack 1.

[0042] Furthermore, in order to be able to disassemble all the battery packs 1 in the battery pack, the disassembly device also includes: a moving seat 15, a first slide bar 16 is arranged on the moving seat 15; a second slide bar 17, the moving seat 15 is arranged on the second slide bar 17, and slides along the second slide bar 17; the first slide bar 16 is arranged along the X direction, and the second slide bar 17 is arranged along the Y direction; or the first slide bar 16 is arranged along the Y direction, and the second slide bar 17 is arranged along the X direction. Taking the first slide bar 16 arranged along the X direction and the second slide bar 17 arranged along the Y direction as an example, after the push plate 12 disassembles a certain battery pack 1, it can slide in the first slide bar 16 along the X direction, and the moving seat 15 slides in the second slide bar 17 along the Y direction, so that the push plate 12 can move in the X direction and the Y direction to the side of the water cooling plate 6 of another battery pack 1 that needs to be disassembled.

[0043] Furthermore, the disassembling device further includes: a driving device 18 , an output end of the driving device 18 is connected to the push plate 12 , and the driving device 18 may also be disposed on the moving seat 15 .

[0044] Furthermore, in order to adapt to battery packs 1 of different sizes, the push plate 12 can be detachably arranged on the first slide bar 16, or can be detachably arranged on the movable seat 15 of the frame 11; when the size of the battery pack changes, push plates 12 of different sizes can be replaced. In addition, the area of ​​action of the thrust and the water-cooling plate 6 is the pushing area. In order to gradually increase the fracture area of ​​the bottom structural glue 7, the pushing area gradually decreases during the process of pushing the battery pack 1. During the pushing process, the pushing area can be reduced by replacing push plates 12 of different sizes and shapes to reduce the pushing area from the Y direction and / or X direction of the battery pack. When reducing the pushing area, those skilled in the art can increase or decrease the size of the thrust according to actual conditions.

[0045] Furthermore, the present invention also provides another method for reducing the pushing area during the pushing process, that is, a plurality of push plates 12 are provided, the push plates 12 include edge push plates 20 and middle push plates 21, the driving device 18 drives the edge push plates 20 and / or the middle push plates 21, and the number of the driven push plates 12 is gradually reduced during the pushing process, so that the pushing area can be reduced. The number and position of the edge push plates 20 and the middle push plates 21 can be adjusted according to actual conditions.

[0046] For example, Figure 7 and Figure 8 As shown, three push plates 12 are arranged along the X direction, the ones close to the two sides are edge push plates 20, and the one in the middle is a middle push plate 21. In the process of initially pushing the battery pack 1, the driving device 18 drives the three push plates 12 to push the battery pack 1 at the same time, and the initial pushing area is the contact area between the three push plates 12 and the water-cooled plate 6; during the pushing process, the number of push plates 12 driven by the driving device 18 is gradually reduced, and finally only the middle push plate 21 is driven to push the battery pack 1. At this time, the pushing area is the contact area between the middle push plate 21 and the water-cooled plate 6.

[0047] Furthermore, the edge push plates 20 are located on both sides of the middle push plate 21 along the Y direction and / or the X direction, such as Figure 7 and Figure 8 and / or the edge push plates 20 are arranged along the circumference of the middle push plate 21, and the middle push plate 21 can be circular or rectangular, as long as the edge push plates 20 are arranged in a circle around the center of the middle push plate 21. The shape and size of the middle push plate 21 can be the same as or different from that of the edge push plates 20.

[0048] Further, if Figure 3-6As shown, since the pressing plate 13 has a large area and volume and is generally a welded part with low processing accuracy, the area where the pressing plate 13 presses against the box frame 3 may be uneven, resulting in only a portion pressing against the box frame 3 and a portion hanging in the air, which will affect the disassembly of the battery pack. Therefore, a pressing block 19 is provided on the side of the pressing plate 13 facing the battery pack. The pressing block 19 is fitted with the box frame 3 of the battery pack, and the edge of the pressing block 19 does not exceed the edge of the box frame 3 of the battery pack, that is, it does not exceed the edge of the shell 10, the longitudinal beam 8 and the cross beam 9, so as to avoid hindering the ejection of the battery pack 1.

[0049] Those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims of the present application, any one of the claimed embodiments may be used in any combination.

[0050] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A battery pack disassembly device, characterized in that: include: A frame, the frame being used to carry a battery pack; A push plate, the push plate being arranged on one side of the frame, and the push plate being used to apply a thrust toward the battery pack to the water cooling plate of the battery pack along the Z direction; A pressure plate, wherein the pressure plate and the push plate are arranged on both sides of the battery pack along the Z direction, and the pressure plate is in contact with the box frame of the battery pack along the Z direction to prevent the box frame of the battery pack from moving along the Z direction.

2. The battery pack disassembly device according to claim 1, characterized in that: The disassembling device also includes: A pulling assembly is located on the same side of the pressure plate along the Z direction and is used to apply a force along the Z direction to the battery pack away from the water cooling plate.

3. The battery pack disassembly device according to claim 1, characterized in that: The frame is provided with a positioning pin along the Z direction, and the positioning pin is used to be inserted into the positioning hole of the battery pack along the Z direction.

4. The battery pack disassembly device according to claim 1, characterized in that: The disassembling device also includes: The push plate is slidably arranged on the first slide bar and slides along the first slide bar.

5. The battery pack disassembly device according to claim 4, characterized in that: The disassembling device also includes: A moving seat, wherein the first sliding rod is arranged on the moving seat; A second sliding rod, the movable seat is arranged on the second sliding rod and slides along the second sliding rod; The first sliding bar is arranged along the X direction, and the second sliding bar is arranged along the Y direction; or The first sliding bar is arranged along the Y direction, and the second sliding bar is arranged along the X direction.

6. The battery pack disassembly device according to claim 1, characterized in that: The disassembling device also includes: A driving device, wherein an output end of the driving device is connected to the push plate.

7. The battery pack disassembly device according to claim 6, characterized in that: The push plate includes an edge push plate and a middle push plate, and the driving device drives the edge push plate and / or the middle push plate.

8. The battery pack disassembly device according to claim 7, characterized in that: The edge push plates are located on both sides of the middle push plate along the Y direction and / or the X direction; and / or The edge push plates are arranged along the circumference of the middle push plate.

9. The battery pack disassembly device according to claim 1, characterized in that: The pressing plate has a pressing block on one side facing the battery pack, the pressing block is in contact with the box frame of the battery pack, and the edge of the pressing block does not exceed the edge of the box frame of the battery pack.

10. The battery pack disassembly device according to claim 2, characterized in that: The pulling assembly has a vacuum suction cup, and the vacuum suction cup is used to apply a force along the Z direction to the battery pack away from the water cooling plate.

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