Battery pack maintenance device and maintenance method

Abstract

The invention discloses a battery pack maintenance device and method, the device comprises a rack, a first fixing rod and a second fixing rod are mounted on the rack, and the first fixing rod and the second fixing rod are parallel to each other and are oppositely arranged; the first fixing rod is provided with a first connecting piece with a first deformation part, the first connecting piece is used for being connected with a box body frame, and the first deformation part is located between the first fixing rod and the box body frame; the second fixing rod is provided with a second connecting piece with a second deformation part, the second connecting piece is used for connecting a box body frame, and the second deformation part is located between the second fixing rod and the box body frame; a pulling mechanism for applying upward pulling force to the liquid cooling plate is arranged on the rack; a jacking piece is mounted on the rack through a telescopic piece, and the telescopic piece drives the jacking piece to move downwards so as to separate the battery pack from the box body frame. According to the invention, the battery pack can be disassembled without being damaged without freezing or heating the battery pack, so that the cost is saved while the process is simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack repair related equipment, and particularly relates to a battery pack repair device and a repair method. Background Art

[0002] With the rapid development of new energy vehicles, lithium-ion battery systems have been widely used. The CTP battery pack is a battery technology without modules. Since it omits the battery module structure and directly integrates the battery cells on the battery pack, the steps are simplified and the working efficiency is greatly improved. Therefore, the CTP battery pack has now entered the market.

[0003] Such as Figure 1 As the current structure of the PCT battery pack, generally, the PCT battery pack includes a box frame 220. A battery pack 210 is arranged inside the battery frame. A liquid cooling plate 230 is installed at the bottom of the box frame 220 by means of adhesion. The liquid cooling plate 230 not only cools the battery but also supports the battery. A large number of adhesive structures are used at the bottom of the battery. Although the temperature heat conduction effect is increased to a certain extent, it causes difficulties in maintenance. The prior art uses a low-temperature freezing method or a heating method to take out the battery cells. Such a method has problems of large investment, high energy consumption and low efficiency, and even the entire battery system is scrapped. Summary of the Invention

[0004] To solve the technical problems in the background art, the present invention provides a battery pack repair device and a repair method.

[0005] A battery pack repair device provided by the present invention is used for repairing a battery pack including a box frame, a battery pack and a liquid cooling plate, and includes a frame. A first fixing rod and a second fixing rod are installed on the frame. The first fixing rod and the second fixing rod are parallel and oppositely arranged;

[0006] A first connecting member with a first deformation part is installed on the first fixing rod. The first connecting member is used for connecting the box frame, and the first deformation part is located between the first fixing rod and the box frame;

[0007] A second connecting member with a second deformation part is installed on the second fixing rod. The second connecting member is used for connecting the box frame, and the second deformation part is located between the second fixing rod and the box frame.

[0008] Specifically, a pulling mechanism for applying an upward pulling force to the liquid cooling plate is arranged on the frame.

[0009] Specifically, a pressing member is further installed on the frame through a telescopic member. The telescopic member drives the pressing member to move downward so that the battery pack is separated from the box frame.

[0010] During the repair process of the battery pack, the box frame is fixed to the first fixed rod and the second fixed rod through the first connecting member and the second connecting member. Preferably, the first connecting member and the second connecting member are installed on the frame through a flipping mechanism. The battery pack is flipped through the flipping mechanism to facilitate the disassembly of the liquid cooling plate and the battery pack. During the process of pulling the liquid cooling plate away from the box frame and the battery pack by the pulling mechanism, the first deformation part and the second deformation part deform. And during the process of the pressing member pressing down on the battery pack to separate the battery pack from the box frame, the first deformation part and the second deformation part deform. Thus, on the premise of separating the liquid cooling plate and the battery pack, the deformation of the battery pack, the liquid cooling plate and the box frame is reduced. This device does not require the existing methods of heating or cryogenic freezing to disassemble the battery pack, which increases the convenience of battery pack repair to a certain extent.

[0011] Preferably, the first connecting member is slidably installed horizontally on the first fixed rod; and / or

[0012] The second connecting member is slidably installed horizontally on the second fixed rod.

[0013] During the process of the pulling mechanism pulling the liquid cooling plate away from the box frame and the battery pack, a relative displacement of the pulling mechanism relative to the box frame is achieved, further increasing the disassembly efficiency of the liquid cooling plate while reducing the deformation of the liquid cooling plate, the battery pack and the box frame during the process of pulling the liquid cooling plate.

[0014] Preferably, a sliding frame is slidably installed horizontally on the frame, and the pulling mechanism is installed on the sliding frame.

[0015] During the process of the pulling mechanism pulling the liquid cooling plate away from the box frame and the battery pack, a relative displacement of the pulling mechanism relative to the box frame is achieved, further increasing the disassembly efficiency of the liquid cooling plate while reducing the deformation of the liquid cooling plate, the battery pack and the box frame during the process of pulling the liquid cooling plate.

[0016] Preferably, a lifting mechanism is installed on the frame, and the first connecting member and the second connecting member are installed at the lifting end of the lifting mechanism. When the pulling mechanism applies an upward pulling force to the liquid cooling plate, the lifting mechanism drives the box frame to move downward.

[0017] Thus, the separation efficiency of the liquid cooling plate is increased.

[0018] Preferably, when the pressing member presses down on the battery pack, the lifting mechanism drives the box frame to move upward.

[0019] The separation efficiency of the battery pack is further increased.

[0020] Preferably, the distance between the first fixed rod and the second fixed rod can be adjusted.

[0021] On the one hand, it is convenient to disassemble battery packs of different models. On the other hand, it is convenient to restore the first deformation part and the second deformation part.

[0022] Preferably, at least two groups of the first connectors are provided, and a first deformation interval is formed between any two adjacent groups of the first connectors; and / or:

[0023] At least two groups of the second connectors are provided, and a second deformation interval is formed between any two adjacent groups of the second connectors.

[0024] Reduce the damage of the battery pack during the disassembly process.

[0025] Preferably, the first deformation part and / or the second deformation part has a bending structure. During the disassembly process of the liquid cooling plate and the battery pack, the bending structure is straightened, further reducing the damage of the battery pack during the disassembly process.

[0026] A battery pack maintenance method, applying the above maintenance device, includes the following steps:

[0027] S1. Install the battery pack on the first fixing rod and the second fixing rod through the first connector and the second connector;

[0028] S2. Flip the battery pack so that the liquid cooling plate of the battery pack is on the top;

[0029] S3. Under the action of an external force, pull a corner of the liquid cooling plate so that a corner of the liquid cooling plate is separated from the box body frame. The pulling mechanism applies an upward force to the corner of the liquid cooling plate separated from the box body frame. During this process, the first deformation part of the first connector deforms and the second deformation part of the second connector deforms until the liquid cooling plate is separated from the box body frame and the battery pack;

[0030] S4. Flip the battery pack so that the side of the battery pack with the glue layer is on the bottom, and then use the pressing member to push downward and move the battery pack downward to realize the separation of the battery pack from the box body frame. During this process, the first deformation part and the second deformation part deform.

[0031] Preferably, in step S3, when the pulling mechanism pulls the liquid cooling plate upward, the relative position between the liquid cooling plate and the pulling mechanism can change with the pulling force of the pulling mechanism on the liquid cooling plate.

[0032] In the present invention, the proposed battery pack maintenance device and maintenance method can realize the non-destructive disassembly of the battery pack without freezing or heating the battery pack, realize the maintenance of the battery cells, simplify the process and save costs at the same time.

[0033] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0034] Figure 1 It is a schematic structural diagram of a CTP battery pack;

[0035] Figure 2 It is a schematic structural diagram of the present invention;

[0036] Figure 3 It is a partial enlarged view of the first fixing rod and the second fixing rod of the present invention;

[0037] Figure 4 It is an exploded view of the first connecting member and the first fixing rod, the second connecting member and the second fixing rod of the present invention;

[0038] Figure 5 It is a partial enlarged view of the pulling rope pulling the liquid cooling plate of the present invention;

[0039] Figure 6 It is a schematic structural diagram of the first connecting member or the second connecting member in some embodiments of the present invention;

[0040] In the figure: 1, frame; 2, battery pack; 210, battery group; 220, box frame; 2200, bump; 230, liquid cooling plate; 3, flipping mechanism; 4, first fixing rod; 5, second fixing rod; 6, first connecting member; 60, first deformation part; 7, second connecting member; 70, second deformation part; 8, pulling mechanism; 80, pulling rope; 81, reel; 9, pressing member; 10, telescopic member; 11, sliding frame; 12, lifting mechanism; 13, battery tray; 14, first connecting part; 15, second connecting part; 16, bending structure. Detailed Description of the Invention

[0041] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar symbols represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0042] As Figures 1 - 5 shown, a battery pack maintenance device, the battery pack 2 includes a battery group 210 and a box frame 220. The battery group 210 is installed in the box frame 220 by pasting. A liquid cooling plate 230 is provided at the bottom of the box frame 220. The bottom of the battery group 210 is connected and fixed to the liquid cooling plate 230 by pasting. The maintenance device includes a frame 1. The frame 1 is installed with a first fixing rod 4 and a second fixing rod 5 through a flipping mechanism 3. The first fixing rod 4 and the second fixing rod 5 are parallel to each other and are arranged oppositely;

[0043] It further includes a first connecting member 6 installed on the first fixing rod 4. The first connecting member 6 is connected to the first side of the box body frame 220. A second connecting member 7 is installed on the second fixing member, and the second connecting member 7 is connected to the second side of the box body frame 220. The first side and the second side are opposite to each other.

[0044] The first connecting member 6 has a first deformation portion 60. The first deformation portion 60 is located between the first fixing rod 4 and the box body frame 220 in the horizontal direction. And in the vertical direction, the first deformation portion 60 is located in the middle of the box body frame 220 and the first fixing rod 4. That is, when the first fixing rod 4 is below the first deformation portion 60, the box body frame 220 is above the first deformation portion 60.

[0045] The second connecting member 7 has a second deformation portion 70. The second deformation portion 70 is located between the second fixing rod 5 and the box body frame 220 in the horizontal direction. And in the vertical direction, the second deformation portion 70 is located in the middle of the second fixing member and the box body frame 220. That is, when the second fixing rod 5 is above the second deformation portion 70, the box body frame 220 is below the second deformation portion 70. Further, when a vertical force is applied to the liquid cooling plate 230 or the battery pack 210, the first deformation portion 60 and the second deformation portion 70 deform, which is convenient for reducing the deformation of the battery pack 2 and reducing the damage to the battery pack 2 during disassembly and assembly.

[0046] The flipping mechanism 3 is used to rotate the box body frame 220 installed between the first fixing rod 4 and the second fixing rod 5 in the horizontal direction, so as to make the liquid cooling plate 230 of the box body frame 220 located above or below.

[0047] A pulling mechanism 8 is provided on the frame 1. The pulling mechanism 8 is used to pull the liquid cooling plate 230 upward. The pulling mechanism 8 includes a winding wheel 81 installed on the frame 1. A pulling rope 80 is provided on the winding wheel 81. The bottom of the pulling rope 80 has a clamp for clamping the liquid cooling plate 230. Rotating the winding wheel 81 makes the pulling rope 80 wind on the frame 1, and;

[0048] A pressing member 9 is further installed on the frame 1 through a telescopic member 10. The telescopic member 10 is used to drive the pressing member 9 to move in the vertical direction to push out the battery pack 210 in the box body frame 220.

[0049] A battery pack repair method, which applies the above battery pack repair device, includes the following steps:

[0050] S1. Install the battery pack 2 on the first fixing rod 4 and the second fixing rod 5 through the first connecting member 6 and the second connecting member 7;

[0051] S2. The flipping device flips the battery pack 2 so that the liquid cooling plate 230 of the battery pack 2 is above;

[0052] S3. Under the action of an external force, pull a corner of the liquid cooling plate 230 to disengage a corner of the liquid cooling plate 230 from the box body frame 220. Fix the pulling rope 80 to this corner, and rotate the reel 81 to realize the upward pulling of the liquid cooling plate 230. During this process, the first deformation part 60 deforms and the second deformation part 70 deforms, thereby realizing the disengagement of the liquid cooling plate 230 from the box body frame 220; the damage to the battery pack 2 is reduced through the deformations of the first deformation part 60 and the second deformation part 70.

[0053] Preferably, when the reel 81 drives the pulling rope 80 to pull the liquid cooling plate 230 upward, the relative position between the liquid cooling plate 230 and the pulling rope 80 can change with the pulling force of the pulling rope 80 on the liquid cooling plate 230, thereby facilitating the disengagement of the liquid cooling plate 230 from the battery pack 210 and the box body frame 220. On the other hand, it is convenient to realize the bending deformation of the first deformation part 60 and the second deformation part 70, and it is also convenient for the later reset of the first deformation part 60 and the second deformation part 70.

[0054] Specifically, in some embodiments, the first connecting member 6 is horizontally slidably mounted on the first fixing rod 4. A first through hole is formed in the first connecting member 6, and the first fixing rod 4 passes through the first through hole. The second connecting member 7 is horizontally slidably mounted on the second fixing rod 5. A second through hole is formed in the second connecting member 7, and the second fixing rod 5 passes through the second through hole; thereby realizing the relative displacement between the liquid cooling plate 230 and the pulling rope 80 in the horizontal direction during the process of the pulling rope 80 pulling the liquid cooling plate 230.

[0055] Preferably, in some embodiments, a sliding frame 11 is also horizontally slidably mounted on the frame 1. The reel 81 is mounted on the sliding frame 11. When the reel 81 winds, the sliding frame 11 can slide horizontally relative to the frame 1, facilitating the pulling rope 80 to pull a corner of the liquid cooling plate 230 to disengage the liquid cooling plate 230 from the battery pack 210 and the box body frame 220.

[0056] Preferably, in some embodiments, the flipping device is mounted on the lifting mechanism 12. When the reel 81 rotates to drive the pulling rope 80 to pull the liquid cooling plate 230 upward, the lifting mechanism 12 drives the battery pack 2 to move downward, further increasing the disengagement of the liquid cooling plate 230 from the battery pack 210 and the box body frame 220.

[0057] S4. The flipping mechanism 3 flips the battery pack 2 so that the side of the battery pack 210 with the adhesive layer is positioned downward. Then, the pressing member 9 moves downward and pushes the battery pack 210 downward to separate the battery pack 210 from the box frame 220. During this process, the first deformation portion 60 and the second deformation portion 70 are deformed, reducing the damage to the battery pack 2. In this embodiment, the first deformation portion 60 and the second deformation portion 70 are in the shape of horizontal plates. Therefore, when the first deformation portion 60 and the second deformation portion 70 are deformed, bending deformation occurs. And when the pressing member 9 applies a downward force to the battery pack 210, the lifting mechanism 12 drives the flipping mechanism 3 to move upward, thereby applying a force in the opposite direction to the adhesive between the battery pack 210 and the box frame 220, facilitating the separation of the battery pack 210 from the box frame 220.

[0058] In some preferred embodiments, it further includes S5. The flipping mechanism 3 drives the box frame 220 to rotate so that the deformation portions of the first deformation and the second deformation portion 70 face the pressing member 9. The telescopic member 10 drives the pressing member 9 to push downward to restore the deformation of the first deformation portion 60 and the second deformation portion 70, and then the box frame 220 is disassembled.

[0059] Preferably, it further includes that the pressing member 9 applies a downward pressure to the first connecting member 6 and the second connecting member 7, thereby realizing the restoration of the first deformation portion 60 and the second deformation portion 70 to their original positions.

[0060] Preferably, the frame 1 further has a battery tray 13 for receiving the battery separated from the box frame 220 by the constant pressure mechanism.

[0061] Preferably, the distance between the first fixing rod 4 and the second fixing rod 5 can be adjusted to fix battery packs 2 of different models.

[0062] Further preferably, the first connecting member 6 is provided with at least two groups, and the second connecting member 7 is provided with at least two groups. In this embodiment, the first connecting member 6 is provided with three groups, and the second connecting member 7 is provided with three groups. A first deformation interval is formed between any two adjacent groups of the first connecting members 6, and a second deformation interval is formed between any two adjacent groups of the second connecting members 7.

[0063] Specifically, both the first connecting member 6 and the second connecting member 7 have a first connecting portion 14 and a second connecting portion 15. Between the first connecting portion 14 and the second connecting portion 15 is a first deformation portion 60 or a second deformation portion 70. The first connecting portion 14 and the second connecting portion 15 are integrally formed. Of course, the first connecting portion 14 and the second connecting portion 15 can be connected by means such as welding. The first connecting portion 14 is slidably connected to the first fixing rod 4 or the second fixing rod 5, and the second connecting portion 15 is connected to the box body frame 220. Specifically, the second connecting portion 15 is a connecting plate extending outward relative to the first connecting portion 14. The connecting plate is connected to the bottom of the outer frame of the box by screws. There are bumps 2200 on the side of the outer frame of the box, and the connecting plate is connected to the bumps 2200 by fixing members such as screws or bolts.

[0064] As Figure 6 shown, in some preferred embodiments, the first deformation portion 60 and the second deformation portion 70 have a bending structure 16. When the first deformation portion 60 and the second deformation portion 70 are stressed, the bending structure 16 is flattened, further reducing the damage to the battery pack 2 during the disassembly process.

[0065] It should be understood that the orientation or positional relationship indicated by terms such as "lateral", "upper", "lower", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention.

[0066] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0067] In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or 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 "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0069] As mentioned above, the above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A battery pack maintenance device, used for maintaining a battery pack comprising a box frame (220), a battery pack (210) and a liquid cooling plate (230), characterized in that: It comprises a frame (1), on which a first fixing rod (4) and a second fixing rod (5) are mounted; A first connecting member (6) having a first deformable portion (60) is mounted on the first fixing rod (4), the first connecting member (6) being used to connect to the box frame (220), the first deformable portion (60) being located between the first fixing rod (4) and the box frame (220); A second connecting member (7) having a second deformable portion (70) is mounted on the second fixing rod (5), the second connecting member (7) being used to connect to the box frame (220), the second deformable portion (70) being located between the second fixing rod (5) and the box frame (220).

2. The battery pack repair device according to claim 1, characterized in that: The first connecting member (6) is laterally slidably mounted on the first fixing rod (4); and / or The second connecting member (7) is laterally slidably mounted on the second fixing rod (5).

3. The battery pack repair device according to claim 1, characterized in that: The frame (1) is provided with a pulling mechanism (8) for applying an upward pulling force to the liquid cooling plate (230), and a sliding frame (11) is installed on the frame (1) for transverse sliding, and the pulling mechanism (8) is installed on the sliding frame (11).

4. The battery pack repair device according to claim 3, characterized in that: A lifting mechanism (12) is installed on the frame (1); the first fixing rod (4) and the second fixing rod (5) are installed at the lifting ends of the lifting mechanism (12); when the pulling mechanism (8) applies an upward pulling force to the liquid cooling plate (230), the lifting mechanism (12) drives the box frame (220) to move downward.

5. The battery pack repair device according to claim 4, characterized in that: A pressing member (9) is also installed on the frame (1) via a telescopic member (10); the telescopic member (10) drives the pressing member (9) to move downward so that the battery pack (210) is separated from the box frame (220); when the pressing member (9) presses the battery pack (210) downward, the lifting mechanism (12) drives the box frame (220) to move upward.

6. The battery pack repair device according to claim 1, characterized in that: The distance between the first fixing rod (4) and the second fixing rod (5) can be adjusted.

7. The battery pack repair device according to claim 1, characterized in that: The first connecting members (6) are provided with at least two groups, and a first deformation interval is formed between any two adjacent groups of the first connecting members (6); and / or: At least two groups of the second connecting members (7) are provided, and a second deformation interval is formed between any two adjacent groups of the second connecting members (7).

8. The battery pack repair device according to claim 1, characterized in that: The first deformation portion (60) and / or the second deformation portion (70) has a bending structure (16).

9. A battery pack maintenance method, characterized in that: The steps include: S1. Installing the battery pack (2) on the first fixing rod (4) and the second fixing rod (5) via the first connecting member (6) and the second connecting member (7); S2, turning over the battery pack (2) so that the liquid cooling plate (230) of the battery pack (2) is located at the top; S3, under the action of external force, a corner of the liquid cooling plate (230) is pulled to separate the corner of the liquid cooling plate (230) from the box frame (220), and the pulling mechanism (8) applies an upward force to the corner of the liquid cooling plate that is separated from the box frame (220), and during this process, the first deformation portion (60) of the first connecting member (6) is deformed and the second deformation portion (70) of the second connecting member (7) is deformed, until the liquid cooling plate (230) is separated from the box frame (220) and the battery pack (210); S4. The battery pack (2) is turned over so that one side of the battery pack (210) with the adhesive layer is at the bottom, and then the top pressure piece (9) is pushed downward to push the battery pack (210) downward to achieve separation of the battery pack (210) from the box frame (220). During this process, the first deformation portion (60) and the second deformation portion (70) are deformed.

10. The battery pack repair method according to claim 9, characterized in that: In step S3, when the pulling mechanism (8) pulls the liquid cooling plate (230) upward, the relative position of the liquid cooling plate (230) and the pulling mechanism (8) may change with the pulling force of the pulling mechanism (8) on the liquid cooling plate (230).

Images