A battery module cover plate disassembly device and disassembly method

Abstract

The present invention discloses a battery module cover plate disassembly device and a disassembly method, including a disassembly platform, a module positioning mechanism, a height measurement mechanism, a solder joint positioning mechanism, and a milling mechanism; the module positioning mechanism is movably arranged on the disassembly platform along the X-axis direction; the height measurement mechanism and the solder joint positioning mechanism are arranged on the moving path of the module positioning mechanism, and the positioning end of the solder joint positioning mechanism is movably arranged on the disassembly platform along the Y-axis direction and the Z-axis direction. The advantages of the present invention are that the disassembly of the welded cover plate of the battery module is realized, not only the milling depth error in the milling process is reduced, the milling accuracy reaches the effect of non-destructive disassembly, but also the milling of different battery modules can be realized, and the applicability is strong.

Description

Technical Field

[0001] The present invention relates to the technical field of battery disassembly, and particularly relates to a battery module cover plate disassembly device and a disassembly method. Background Art

[0002] During the production process of lithium battery modules, it is necessary to perform voltage and capacity matching for individual batteries. After the cell matching is completed, an integrated cover plate (mostly made of aluminum) is welded to the pole columns of each cell to form a complete set of modules. However, in subsequent processing steps, it is found that there are phenomena such as excessive voltage differences and capacity differences among individual cells in the welded modules, or welding defects such as false soldering and explosion points. At this time, it is necessary to perform non-destructive disassembly on the modules and recycle the qualified cells for secondary use. For example, the Chinese invention patent document with the publication number CN106129518A discloses a disassembly method and device for a lithium battery shell, which is used to complete the separation of the battery shell, cover plate and internal cells, and improve the recycling efficiency of the battery.

[0003] However, when the module is welded to the cover plate, due to the height differences of each cell and the inconsistent sizes of the welding gaps between the cell pole columns and the cover plate, the positions and height dimensions of each solder joint are inconsistent, making it difficult to perform precise non-destructive disassembly on each solder joint. Summary of the Invention

[0004] The technical problem to be solved by the present invention is how to achieve precise non-destructive disassembly of the cover plate.

[0005] To solve the above technical problem, the present invention provides the following technical solutions:

[0006] A battery module cover plate disassembly device includes a disassembly platform, a module positioning mechanism, a height measurement mechanism, a solder joint positioning mechanism and a milling mechanism;

[0007] The module positioning mechanism is movably arranged on the disassembly platform along the X-axis direction;

[0008] The height measurement mechanism and the solder joint positioning mechanism are arranged on the moving path of the module positioning mechanism, and the positioning end of the solder joint positioning mechanism is movably arranged on the disassembly platform along the Y-axis direction and the Z-axis direction;

[0009] The milling end of the milling mechanism is movably arranged on the disassembly platform along the Y-axis direction and the Z-axis direction.

[0010] The present invention realizes the disassembly of the welded cover plate of the battery module, not only reduces the milling depth error during the milling process, and the milling accuracy reaches the effect of non-destructive disassembly, but also can realize the milling of different battery modules, with strong applicability.

[0011] Preferably, the module positioning mechanism includes a supporting platform, a first positioning component and a second positioning component. The supporting platform is movable along the X-axis direction and is arranged on the disassembly platform. The positioning end of the first positioning component is arranged on the supporting platform to limit the movement of the battery module along the X-axis direction. The positioning end of the second positioning component is movable along the Y-axis direction and is arranged on the supporting platform to limit the movement of the battery module along the Y-axis direction.

[0012] Preferably, the first positioning component is a positioning plate.

[0013] Preferably, the second positioning assembly includes a left positioning block, a right positioning block and a screw transmission assembly, the left positioning block can be moved along the Y-axis direction and is arranged on a supporting platform on the left side of the first positioning assembly, the right positioning block can be moved along the Y-axis direction and is arranged on a supporting platform on the right side of the first positioning assembly, the transmission ends of the screw transmission assembly are threadedly connected with the left positioning block and the right positioning block, driving the screw transmission assembly to cause the left positioning block and the right positioning block to move toward or away from each other.

[0014] The battery module is pressed and fixed by the left positioning block and the right positioning block moving toward each other, thereby preventing the battery module from shifting during subsequent milling.

[0015] Preferably, the height measuring mechanism comprises a first rangefinder, and the first rangefinder is arranged at the top of the moving path of the module positioning mechanism.

[0016] The milling height of the battery module pressed and fixed on the module positioning mechanism is roughly positioned by the first distance meter to achieve height milling compensation.

[0017] Preferably, the solder point positioning mechanism includes a support frame, a support plate and a solder point positioning pressure head, the support frame is arranged on the moving path of the module positioning mechanism, the support plate can be moved along the Z-axis direction and is arranged on the support frame at the top of the moving path of the module positioning mechanism, and the solder point positioning pressure head can be moved along the Y-axis direction and is arranged at the bottom of the support plate.

[0018] The welding points on the battery module are positioned and pressed by the welding point positioning press head, which reduces the milling depth error in the subsequent milling process and achieves the effect of non-destructive disassembly with milling accuracy.

[0019] Preferably, the milling mechanism includes a milling bracket and a milling part, the milling bracket can be moved along the Y-axis direction and is arranged on the disassembly platform, the milling part can be moved along the Z-axis direction and is arranged on the milling bracket, and the milling end of the milling part is arranged on the top of the welding point positioning mechanism.

[0020] The milling part can move in the axial direction and the axial direction, so that the milling of different battery modules can be realized, and the applicability is strong.

[0021] Preferably, a second distance measurer is provided on the milling part.

[0022] Preferably, a camera is provided on the milling part.

[0023] Preferably, the present invention also provides a disassembly method performed by the above-mentioned battery module cover plate disassembly device, including the following steps:

[0024] Step 1: Hoist the battery module onto the module positioning mechanism, and position and clamp the battery module through the module positioning mechanism.

[0025] Step 2: Move the module positioning mechanism along the X-axis direction on the disassembly platform to the solder joint positioning mechanism, and preliminarily measure the height of the solder joints of the battery module through the height measuring mechanism during the movement.

[0026] Step 3: When the module positioning mechanism moves to the solder joint positioning mechanism, according to the solder joint position of the battery module, move the positioning end of the solder joint positioning mechanism along the Y-axis direction so that the positioning end of the solder joint positioning mechanism is directly above the solder joint of the battery module, and then move the positioning end of the solder joint positioning mechanism along the Z-axis direction so that the positioning end of the solder joint positioning mechanism moves downward to position and clamp the solder joint of the battery module.

[0027] Step 4: According to the solder joint position of the battery module, move the milling end of the milling mechanism along the Y-axis direction so that the milling end of the milling mechanism is directly above the solder joint of the battery module, and then move the milling end of the milling mechanism along the Z-axis direction so that the milling end of the milling mechanism moves downward to mill the solder joint positioned and clamped by the solder joint positioning mechanism.

[0028] Step 5: After the milling of the previous solder joint is completed, repeat Step 3 and Step 4 to mill the next solder joint until all the solder joints of the battery module are milled, and then take out the welded cover plate of the battery module.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. The present invention realizes the disassembly of the welded cover plate of the battery module, not only reduces the milling depth error during the milling process, the milling accuracy reaches the effect of non-destructive disassembly, but also can realize the milling of different battery modules, with strong applicability.

[0031] 2. The battery module is clamped and fixed by the opposite movement of the left positioning block and the right positioning block, preventing the battery module from shifting during the subsequent milling.

[0032] 3. The solder joints on the battery module are positioned and clamped by the solder joint positioning press head, reducing the milling depth error during the subsequent milling process, and the milling accuracy reaches the effect of non-destructive disassembly.

[0033] 4. Coarse position the milling height of the battery module tightly fixed on the module positioning mechanism through the first distance measurer to achieve height milling compensation.

[0034] 5. Since the milling part can move along the axial direction and the axial direction, milling of different battery modules can be achieved, with strong applicability. Description of the Drawings

[0035] Figure 1 Structural schematic diagram of a battery module cover plate disassembly device according to an embodiment of the present invention;

[0036] Figure 2 Structural schematic diagram of the module positioning mechanism according to an embodiment of the present invention;

[0037] Figure 3 Structural schematic diagram of the solder joint positioning mechanism according to an embodiment of the present invention;

[0038] Figure 4 Cross-sectional view of the solder joint positioning mechanism according to an embodiment of the present invention;

[0039] Figure 5 Structural schematic diagram of the milling mechanism according to an embodiment of the present invention;

[0040] Figure 6 Another structural schematic diagram of the milling mechanism according to an embodiment of the present invention. Detailed Embodiments

[0041] To facilitate those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention will be further described below in conjunction with the drawings in the specification.

[0042] In this application, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms 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, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In this application, unless otherwise clearly defined and limited, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more, unless otherwise clearly and specifically defined.

[0044] Refer to Figure 1, this embodiment discloses a battery module cover plate disassembly device, including a disassembly platform 1, a module positioning mechanism 2, a height measurement mechanism 3, a solder joint positioning mechanism 4, and a milling mechanism 5.

[0045] The disassembly platform 1 includes a horizontal platform 11 and a vertical platform 12, and the vertical platform 12 is vertically arranged at one end of the horizontal platform 11.

[0046] Refer to Figure 1 and Figure 2 , the module positioning mechanism 2 includes a support platform 21, a first positioning component 22, and a second positioning component 23. The support platform 21 is movably arranged on the horizontal platform 11 along the X-axis direction. Specifically, the bottom of the support platform 21 is arranged on the horizontal platform 11 through a first sliding component 6, so that the support platform 21 can move along the X-axis direction on the horizontal platform 11.

[0047] The positioning end of the first positioning component 22 is arranged on the support platform 21. In this embodiment, the first positioning component 22 is a positioning plate vertically fixed on the support platform 21, and the length direction of the positioning plate is arranged along the Y-axis direction, which is used to limit the movement of the battery module 10 along the X-axis direction. Further, a scale is also provided on the positioning plate to facilitate the precise positioning of the battery module 10.

[0048] The second positioning component 23 includes a left positioning block 231, a right positioning block 232, and a screw rod transmission component 233. A second sliding component 7 is arranged on the support platform 21 along the Y-axis direction. The left positioning block 231 is movably arranged on the second sliding component 7 of the support platform 21 on the left side of the first positioning component 22 along the Y-axis direction, and the right positioning block is movably arranged on the second sliding component 7 of the support platform 21 on the right side of the first positioning component 22 along the Y-axis direction. The transmission ends of the screw rod transmission component 233 are both threadedly connected to the left positioning block 231 and the right positioning block 232. Driving the screw rod transmission component 233 causes the left positioning block 231 and the right positioning block 232 to move towards each other or away from each other.

[0049] The screw rod transmission component 233 includes a driving motor and a screw rod. The driving motor is fixed on the support platform 21, the output end of the driving motor is connected to the screw rod, the screw rod is threadedly connected to the left positioning block 231 and the right positioning block 232, and the thread matching directions of the screw rod and the left positioning block 231 are opposite to the thread matching directions of the screw rod and the right positioning block 232. Therefore, when the screw rod rotates, the left positioning block 231 and the right positioning block 232 can move towards each other or away from each other.

[0050] Lift the battery module 10 and hoist it onto the support platform 21, and place it close to the first positioning component 22. Then drive the drive motor, and through the rotation of the lead screw, drive the left positioning block 231 and the right positioning block 232 to move towards each other to clamp and fix the battery module 10, preventing the battery module 10 from shifting during later milling.

[0051] The height measuring mechanism 3 includes a measuring bracket 31 and a first distance measuring device 32. The measuring bracket 31 is U-shaped. The measuring bracket 31 is fixed on the horizontal platform 11 perpendicular to the length direction of the first sliding component 6. The first distance measuring device 32 is arranged on the measuring bracket 31 at the top of the first sliding component 6. Further, the first distance measuring device 32 is a laser distance sensor. When the module positioning mechanism 2 moves to the bottom of the first distance measuring device 32, the rough positioning of the milling height of the battery module 10 clamped and fixed on the module positioning mechanism 2 is carried out through the first distance measuring device 32 to achieve height milling compensation.

[0052] Refer to Figure 3 and Figure 4 As shown in and, the solder joint positioning mechanism 4 includes a support frame 41, a support plate 42, a solder joint positioning press head 43, a first lifting cylinder 44, a guide rod 45 and a drive cylinder 46. The support frame 41 is U-shaped. The support frame 41 is fixed on the horizontal platform 11 perpendicular to the length direction of the first sliding component 6. The support plate 42 is arranged on the support frame 41 at the top of the first sliding component 6 and can move along the Z-axis direction. The solder joint positioning press head 43 is arranged at the bottom of the support plate 42 and can move along the Y-axis direction.

[0053] A first lifting cylinder 44 is arranged at the bottom of the horizontal platform 11. The output end of the first lifting cylinder 44 penetrates through the horizontal platform 11 and is connected to the bottom of the support plate 42. By driving the first lifting cylinder 44, the support plate 42 is driven to move along the Z-axis direction, and further the solder joint positioning press head 43 is driven to move along the Z-axis direction to position and clamp the solder joints on the battery module 10, reducing the milling depth error during later milling, and the milling accuracy reaches the effect of non-destructive disassembly. Further, a guide rod 45 is fixed between the support frame 41 and the horizontal platform 11, and both ends of the support plate 42 are sleeved on the guide rod 45 to prevent the support plate 42 from shifting when moving along the Z-axis direction.

[0054] The solder joint positioning press head 43 is arranged at the bottom of the support plate 42 through a sliding component. Specifically, a drive cylinder 46 is fixed on one side of the support frame 41. The output end of the drive cylinder 46 is connected to the solder joint positioning press head 43. By driving the drive cylinder 46, the solder joint positioning press head 43 is driven to move along the Y-axis direction at the bottom of the support plate 42, and further the solder joint positioning press head 43 is driven to move along the Y-axis direction.

[0055] Refer to Figure 5 and Figure 6, the milling mechanism 5 includes a milling bracket 51, a milling part 52, a second lifting cylinder 53, a top plate 54, a second distance measurer 55 and a camera 56. The milling bracket 51 is arranged on the vertical platform 12 through a third sliding component 8 and can move along the Y-axis direction. The milling part 52 is arranged on the milling bracket 51 through a fourth sliding component 9 and can move along the Z-axis direction. The milling end of the milling part 52 is arranged on the top of the solder joint positioning press head 43. By being able to move along the Y-axis direction and the Z-axis direction, the milling part 52 can realize the milling of different battery modules 10, and has strong applicability.

[0056] A second lifting cylinder 53 is fixed on one side of the milling part 52. The output end of the second lifting cylinder 53 is connected to the top plate 54. A second distance measurer 55 is arranged on the top plate 54. In this embodiment, the second distance measurer 55 is a contact type distance measuring sensor. Specifically, driving the second lifting cylinder 53 drives the top plate 54 to move downwards, and then drives the second distance measurer 55 to move downwards and contact the solder joint of the battery module 10. Specifically, it can perform multi-point measurement on the positions around the pressed solder joint, take the average height value as the milling height reference, obtain an accurate solder joint milling height reference, and realize the single-point depth milling control of the solder joint of the battery module 10, ensuring the precise and non-destructive disassembly of the cover plate of the battery module 10.

[0057] The camera 56 is fixed on the side of the milling part 52 far from the second distance measurer 55. The precise positioning of the solder joint of the battery module 10 is realized by taking pictures with the camera 56. In this embodiment, the camera 56 is a CCD camera.

[0058] Furthermore, a temperature and smoke sensor is also fixed on the module positioning mechanism 2 to realize the real-time monitoring of the milling state of the battery module 10.

[0059] The present invention also provides a disassembly method carried out by a battery module cover plate disassembly device, including the following steps:

[0060] Step 1: Hoist the battery module 10 onto the support platform 21 and closely lean against the first positioning component 22. Then drive the driving motor, and drive the left positioning block 231 and the right positioning block 232 to move towards each other through the rotation of the lead screw to tightly fix the battery module 10.

[0061] Step 2: Move the module positioning mechanism 2 along the X-axis direction on the horizontal platform 11 to the solder joint positioning mechanism 4. During the movement, the rough positioning of the milling height of the battery module 10 tightly fixed on the module positioning mechanism 2 is carried out through the first distance measurer 32 to realize the height milling compensation.

[0062] Step 3: The module positioning mechanism 2 moves to the solder joint positioning mechanism 4 and stops moving. According to the solder joint position of the battery module 10, the driving cylinder 46 drives the solder joint positioning press head 43 to move along the Y-axis direction at the bottom of the support plate 42, thereby driving the solder joint positioning press head 43 to move along the Y-axis direction, so that the solder joint positioning press head 43 is directly above the solder joint of the battery module 10;

[0063] Then drive the first lifting cylinder 44 to drive the support plate 42 to move along the Z-axis direction, thereby driving the solder joint positioning press head 43 to move downward along the Z-axis direction to position and clamp the solder joint on the battery module 10 tightly;

[0064] Step 4: According to the solder joint position of the battery module 10, move the milling bracket 51 on the milling mechanism 5 along the Y-axis direction, so that the milling end of the milling part 52 is directly above the solder joint of the battery module 10;

[0065] Then drive the second lifting cylinder 53 to drive the top plate 54 to move downward, driving the second distance measuring device 55 to move downward, and perform multi-point measurement on the positions around the pressed solder joint, and take the average height value as the milling height reference. In this embodiment, four points distributed in a circle are measured around the solder joint;

[0066] Finally, move the milling part 52 along the Z-axis direction on the milling bracket 51, so that the milling end of the milling part 52 moves downward to perform milling operation on the solder joint positioned and clamped by the solder joint positioning mechanism;

[0067] Step 5: After the milling of the previous solder joint is completed, repeat Step 3 and Step 4 to perform milling operation on the next solder joint until all the solder joints of the battery module 10 are milled, and then take out the welding cover plate of the battery module 10.

[0068] Through the above disassembly device and disassembly method, the present invention realizes the disassembly of the welding cover plate of the battery module 10, not only reduces the milling depth error in the milling process, and the milling accuracy reaches the effect of non-destructive disassembly, but also can realize the milling of different battery modules 10, with strong applicability.

[0069] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0070] The above-described embodiments merely represent the implementation manners of the invention. The protection scope of the present invention is not limited to the above embodiments only. For those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention.

Claims

1. A battery module cover plate disassembly device, characterized in that: it includes a disassembly platform, a module positioning mechanism, a height measurement mechanism, a solder joint positioning mechanism and a milling mechanism; the module positioning mechanism is movably arranged on the disassembly platform along the X-axis direction; the height measurement mechanism and the solder joint positioning mechanism are arranged on the moving path of the module positioning mechanism, and the positioning end of the solder joint positioning mechanism is movably arranged on the disassembly platform along the Y-axis direction and the Z-axis direction; the milling end of the milling mechanism is movably arranged on the disassembly platform along the Y-axis direction and the Z-axis direction; the solder joint positioning mechanism includes a support frame, a support plate and a solder joint positioning press head. The support frame is arranged on the moving path of the module positioning mechanism. The support plate is movably arranged on the support frame at the top of the moving path of the module positioning mechanism along the Z-axis direction. The solder joint positioning press head is movably arranged at the bottom of the support plate along the Y-axis direction; the milling mechanism includes a milling support and a milling part. The milling support is movably arranged on the disassembly platform along the Y-axis direction. The milling part is movably arranged on the milling support along the Z-axis direction. The milling end of the milling part is arranged on the top of the solder joint positioning mechanism.

2. The battery module cover plate disassembly device according to claim 1, characterized in that: the module positioning mechanism includes a support platform, a first positioning component and a second positioning component. The support platform is movably arranged on the disassembly platform along the X-axis direction. The positioning end of the first positioning component is arranged on the support platform to limit the movement of the battery module along the X-axis direction. The positioning end of the second positioning component is movably arranged on the support platform along the Y-axis direction to limit the movement of the battery module along the Y-axis direction.

3. The battery module cover plate disassembly device according to claim 2, characterized in that: the first positioning component is a positioning plate.

4. The battery module cover plate disassembly device according to claim 2, characterized in that: the second positioning component includes a left positioning block, a right positioning block and a screw rod transmission component. The left positioning block is movably arranged on the support platform on the left side of the first positioning component along the Y-axis direction. The right positioning block is movably arranged on the support platform on the right side of the first positioning component along the Y-axis direction. The transmission ends of the screw rod transmission component are threadedly connected to the left positioning block and the right positioning block respectively, and driving the screw rod transmission component causes the left positioning block and the right positioning block to move towards each other or away from each other.

5. The battery module cover plate disassembly device according to claim 1, characterized in that: the height measurement mechanism includes a first distance measuring device, and the first distance measuring device is arranged at the top of the moving path of the module positioning mechanism.

6. The battery module cover plate disassembly device according to claim 1, characterized in that: a second distance measuring device is arranged on the milling part.

7. The battery module cover plate disassembly device according to claim 1, characterized in that: a camera is arranged on the milling part.

8. A disassembly method using the battery module cover plate disassembly device according to any one of claims 1 to 7, characterized in that: it includes the following steps: Step 1: Hoist the battery module onto the module positioning mechanism, and position and clamp the battery module through the module positioning mechanism; Step 2: Move the module positioning mechanism along the X-axis direction on the disassembly platform to the solder joint positioning mechanism, and preliminarily measure the height of the solder joints of the battery module through the height measuring mechanism during the movement; Step 3: When the module positioning mechanism moves to the solder joint positioning mechanism, according to the solder joint position of the battery module, move the positioning end of the solder joint positioning mechanism along the Y-axis direction so that the positioning end of the solder joint positioning mechanism is directly above the solder joint of the battery module, and then move the positioning end of the solder joint positioning mechanism along the Z-axis direction so that the positioning end of the solder joint positioning mechanism moves down to position and clamp the solder joint of the battery module; Step 4: According to the solder joint position of the battery module, move the milling end of the milling mechanism along the Y-axis direction so that the milling end of the milling mechanism is directly above the solder joint of the battery module, and then move the milling end of the milling mechanism along the Z-axis direction so that the milling end of the milling mechanism moves down to perform a milling operation on the solder joint positioned and clamped by the solder joint positioning mechanism; Step 5: After the milling of the previous solder joint is completed, repeat Step 3 and Step 4 to perform a milling operation on the next solder joint until all the solder joints of the battery module are milled, and then take out the welding cover plate of the battery module.

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