Battery module end cover assembly device

Abstract

The present invention relates to a battery module end cover plate assembly device, which belongs to the field of lithium battery module production. The battery module end cover plate assembly device includes a material picking part, a transportation part and a material unloading part; wherein: the material picking part is used to move the end cover plate to the transportation part; the transportation part includes a conveying device and a jig installed on the conveying device, and the jig is used to fix the battery module; the jig receives the end cover plate sent by the material picking part, and assembles the end cover plate to the battery module to form a battery module assembly; the material unloading part is used to remove the battery module assembly from the transportation part. The present invention conveys the end cover plate to the transportation part through the material picking part, assembles the end cover plate on the battery module through the jig, and removes the battery module assembly through the material unloading part, thereby realizing mechanized assembly and greatly improving production efficiency.

Description

Technical Field

[0001] The invention relates to the field of lithium battery module production, in particular to a battery module end cover plate assembly device. Background Art

[0002] In the production process of lithium battery modules, multiple battery cells are arranged in parallel to form a battery module. Fig.13 As shown, the cover plate 102, the end cover plate 103 and the envelope structure 104 are assembled in sequence at both ends of the battery module 101. The cover plate 102 is used to converge the electric energy of each battery cell, and the end cover plate 103 is used for insulation and to separate the cover plate 102 from the outside. The cover plate 102 is snap-fitted to the battery module 101, and the end cover plate 103 is also snap-fitted to the cover plate 102. The envelope structure 104 is made of metal material and is installed on the outside of the end cover plate 103. The package cover 105 covers the outside of the battery module 101 and is used to reinforce the battery module 101. The package cover 105 and the envelope structure 104 are welded together to form the battery module assembly 100.

[0003] In the prior art, the end cover plates are generally assembled on both ends of the battery module manually, which not only has low production efficiency, but also affects the quality of the lithium battery module.

[0004] Therefore, it is necessary to design a battery module end cover plate assembly device that can improve efficiency. Summary of the invention

[0005] The present invention aims to solve the problem of low efficiency in manually assembling end cover plates of existing lithium battery modules and provides a high-efficiency battery module end cover plate assembly device.

[0006] The technical solution of the present invention is as follows:

[0007] A battery module end cover plate assembly device is used to assemble the end cover plate onto the battery module, and the battery module end cover plate assembly device comprises a material taking part, a transportation part and a material unloading part; wherein: the material taking part is used to move the end cover plate to the transportation part; the transportation part comprises a conveying device and a jig installed on the conveying device, and the jig is used to fix the battery module; the jig receives the end cover plate sent by the material taking part, and assembles the end cover plate onto the battery module to form a battery module assembly; the material unloading part is used to remove the battery module assembly from the transportation part.

[0008] The end cover plate is transported to the transportation part through the material taking part, the end cover plate is assembled on the battery module through the jig, and the battery module assembly is removed through the material unloading part, realizing mechanized assembly and greatly improving production efficiency.

[0009] Furthermore, the material picking part includes a first material picking device, a second material picking device and a lifting device, the lifting device is used to lift the end cover plate from the end cover plate conveying device to the first material picking device or the second material picking device, the first material picking device and the second material picking device respectively transport one end cover plate to the cache part.

[0010] By arranging two material taking devices in the material taking part, the two end cover plates can be conveyed alternately, thus saving the material feeding time of the end cover plates.

[0011] Furthermore, the first material picking device includes a material picking lifting mechanism and a material picking translation mechanism, the material picking translation mechanism includes a first translation mechanism and a second translation mechanism, the material picking lifting mechanism is installed on the first translation mechanism, and the first translation mechanism is installed on the second translation mechanism; the material picking lifting mechanism drives the end cover plate to rise and fall, the material picking lifting mechanism moves along the first horizontal direction driven by the first translation mechanism, and the first translation mechanism moves along the second horizontal direction driven by the second translation mechanism.

[0012] The material taking device can realize accurate loading of the end cover plate by setting a material taking lifting mechanism and a material taking translation mechanism.

[0013] Furthermore, the material picking and lifting mechanism includes a lifting motor, a rotating cylinder, a clamping cylinder and a material picking claw. The material picking claw is installed on the clamping cylinder, the clamping cylinder is installed on the rotating cylinder, and the rotating cylinder is installed on the lifting motor; the clamping cylinder drives the material picking claw to open and close, the rotating cylinder drives the clamping cylinder and the material picking claw to rotate, and the lifting motor drives the rotating cylinder, the clamping cylinder and the material picking claw to lift and lower.

[0014] The material picking lifting mechanism includes a lifting motor, a rotating cylinder, a clamping cylinder and a material picking clamp. Through the cooperation of the motor and the cylinder, the material picking clamp can be positioned at any position in space.

[0015] Furthermore, the battery module end cover plate assembly device also includes a cache portion, which is located between the material taking portion and the transportation portion and is used to move the end cover plate from the material taking portion to the transportation portion.

[0016] The present invention realizes temporary storage of end cover plate materials by arranging a buffer part, thereby saving material loading time.

[0017] Furthermore, the cache part includes a transverse movement device and a clamping device, and the clamping device includes a clamping cylinder, a lifting cylinder, a cache clamp cylinder and a cache clamp; the cache clamp is installed on the cache clamp cylinder, the cache clamp cylinder is installed on the lifting cylinder, the lifting cylinder is installed on the clamping cylinder, and the clamping cylinder is installed on the transverse movement device; the transverse movement device drives the clamping device to move horizontally, the clamping cylinder drives the lifting cylinder and the cache clamp cylinder to move horizontally, the lifting cylinder drives the cache clamp cylinder to rise and fall, and the cache clamp cylinder drives the cache clamp to open and close.

[0018] The production efficiency can be further improved by transporting the temporarily stored end cover plates to the transportation department through the cooperation of the transverse moving device and the clamping and conveying device.

[0019] Furthermore, an extension cylinder is installed between the transverse moving device and the clamping and conveying device. The extension cylinder is installed on the transverse moving device, and the clamping and conveying device is installed on the extension cylinder. The extension cylinder drives the clamping and conveying device to move horizontally.

[0020] By providing an extended cylinder, the stroke of the transverse movement device can be increased and the adaptability of the buffer section can be improved.

[0021] Furthermore, the fixture includes a fixing device and a pressing device, the fixing device is used to fix the battery module, and the pressing device is used to press the end cover plate onto the battery module.

[0022] The fixture includes a fixing device and a pressing device, which can realize the positioning of the battery module and the assembly of the end cover.

[0023] Furthermore, the fixing device includes a platform bracket, a fixing plate and a fixing cylinder. The fixing plates are installed on opposite sides of the platform bracket, and the fixing cylinder drives the fixing plates to move closer to or away from the platform bracket.

[0024] The fixing device uses a cylinder to drive a fixing plate to fix the battery module, and has a simple structure.

[0025] Furthermore, a clamping device is installed on the other opposite sides of the platform bracket, and the clamping device includes a telescopic cylinder, an end cover plate clamping cylinder and an end cover plate clamping cylinder. The end cover plate clamping cylinder is installed on the end cover plate clamping cylinder, and the end cover plate clamping cylinder is installed on the telescopic cylinder. The end cover plate clamping cylinder is used to clamp the end cover plate transported by the material picking part. The telescopic cylinder drives the end cover plate clamping cylinder to approach or move away from the fixing device, and the end cover plate clamping cylinder drives the end cover plate to be pressed against the battery module.

[0026] The end cover plate is assembled onto the battery module through a clamping device, which has high reliability.

[0027] Furthermore, the unloading part is installed at the discharge end of the transportation part. The unloading part includes a handling device and a lifting device. The handling device clamps the battery module assembly transported by the transportation part and places it on the lifting device. The lifting device descends to send the battery module assembly to the next workstation.

[0028] The unloading section includes a handling device and a lifting device, which can remove the assembled battery module components and send them to the next workstation, thereby improving the production efficiency of the next workstation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0030] Figure 2It is a schematic diagram of the three-dimensional structure from another viewing angle of the present invention.

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the material taking part in the present invention.

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of the first material taking device in the material taking part of the present invention.

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure of the first material taking device in the present invention from another perspective.

[0034] Figure 6 It is a schematic diagram of the three-dimensional structure of the cache unit in the present invention.

[0035] Figure 7 It is a schematic diagram of the three-dimensional structure of the cache unit in the present invention from another perspective.

[0036] Figure 8 It is a schematic diagram of the three-dimensional structure of the fixture in the present invention.

[0037] Fig. 9 It is a schematic diagram of the three-dimensional structure of the fixing device in the fixture of the present invention.

[0038] Fig.10 It is a schematic diagram of the three-dimensional structure of the clamping device in the fixture of the present invention.

[0039] Fig.11 It is a schematic diagram of the three-dimensional structure of the blanking part in the present invention.

[0040] Fig.12 It is a three-dimensional structural schematic diagram of another viewing angle of the blanking part in the present invention.

[0041] Fig.13 An exploded view of the battery module assembly in the present invention.

[0042] Fig.14 It is a schematic diagram of the structure of the end cover plate when clamping in the present invention.

[0043] Figure 1 to Figure 14The invention comprises a material taking part 10, a first material taking device 11, a material taking lifting mechanism 111, a clamping cylinder 1111, a rotating cylinder 1112, a material taking clamping claw 1113, a lifting motor 1114, a material taking translation mechanism 112, a first translation mechanism 1121, a second translation mechanism 1122, a first transverse movement motor 1123, a second transverse movement motor 1124, a second material taking device 12, a lifting device 13, an end cover plate conveying device 14, a buffer part 20, a transverse movement device 21, a transverse movement cylinder 211, an extension cylinder 212, a clamping device 22, a pressing cylinder 221, a lifting cylinder 222, a clamping claw air cylinder 213, a lifting motor 1114, a material taking translation mechanism 112, a first translation mechanism 1121, a second translation mechanism 1122, a first transverse movement motor 1123, a second transverse movement motor 1124, a second material taking device 12, a lifting device 13, an end cover plate conveying device 14, a buffer part 20, a transverse movement device 21, a transverse movement cylinder 211, an extension cylinder 212, a clamping device 22, a pressing cylinder 221, a lifting cylinder 222, and a clamping claw air cylinder 213. Cylinder 223, cache clamp 224, transport part 30, jig 31, fixing device 311, fixing cylinder 3111, platform bracket 3112, fixing plate 3113, clamping device 312, telescopic cylinder 3121, end cover plate clamping cylinder 3122, end cover plate clamping cylinder 3123, jig clamp 3124, conveying device 32, motor 321, long guide rail 322, unloading part 40, handling device 41, lifting device 42, battery module assembly 100, battery module 101, cover plate 102, end cover plate 103, buckle 1031, envelope structure 104, package cover 105. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] like Figure 1 , Figure 2 and Fig.13 As shown, the present invention is a battery module end cover plate assembly device, which is used to assemble the end cover plate 103 onto the battery module 101.

[0046] The battery module end cover plate assembly device at least includes a material picking part 10, a transportation part 30 and a material unloading part 40. The material picking part 10, the transportation part 30 and the material unloading part 40 are all installed on the structural platform, the material picking part 10 is located on one side of the transportation direction of the transportation part 30, and the material unloading part 40 is located at the end of the transportation direction of the transportation part 30. Among them: the material picking part 10 is used to move the end cover plate 103 to the transportation part 30; the transportation part 30 includes a conveying device 32 and a fixture 31 installed on the conveying device 32, and the fixture 31 is used to fix the battery module 101; the fixture 31 receives the end cover plate 103 sent by the material picking part 10, and assembles the end cover plate 103 to the battery module 101 to form a battery module assembly 100; the material unloading part 40 is used to remove the battery module assembly 100 from the transportation part 30.

[0047] The present invention conveys the end cover plate 103 to the transportation part 30 through the material taking part 10, assembles the end cover plate 103 on the battery module 101 through the fixture 31, and removes the battery module assembly 100 through the material unloading part 40, thereby realizing mechanized assembly and greatly improving production efficiency.

[0048] like Figure 3 As shown, the material taking part 10 comprises a first material taking device 11, a second material taking device 12 and a lifting device 13, and the lifting device 13 is located below the first material taking device 11 and the second material taking device 12. The lifting device 13 is used to lift the end cover plate 103 from the end cover plate conveying device 14 to the first material taking device 11 or the second material taking device 12, and the first material taking device 11 and the second material taking device 12 respectively convey one end cover plate 103 to the buffer part 20.

[0049] The material taking part 10 of the present invention is provided with two material taking devices, which can alternately convey the two end cover plates 103 , thus saving the material feeding time of the end cover plates 103 .

[0050] The lifting device 13 is used in conjunction with the end cover plate conveying device 14, and is usually provided with multiple sets. In this embodiment, there are four sets, and each material taking device is respectively equipped with two sets. The lifting device 13 adopts an existing conventional device, such as a hydraulic lifting device; the end cover plate conveying device 14 generally adopts an existing material vehicle. The structures of the lifting device 13 and the end cover plate conveying device 14 are both known and will not be repeated here.

[0051] The first material taking device 11 and the second material taking device 12 generally adopt the same structure. The structure of the first material taking device 11 is used for explanation below. Figure 4 , Figure 5 As shown, the first material picking device 11 includes a material picking lifting mechanism 111 and a material picking translation mechanism 112, and the material picking translation mechanism 112 includes a first translation mechanism 1121 and a second translation mechanism 1122. The material picking lifting mechanism 111 is installed on the first translation mechanism 1121, and the first translation mechanism 1121 is installed on the second translation mechanism 1122; the material picking lifting mechanism 111 drives the end cover plate 103 to rise and fall, and the material picking lifting mechanism 111 moves along the first horizontal direction driven by the first translation mechanism 1121, and the first translation mechanism 1121 moves along the second horizontal direction driven by the second translation mechanism 1122. The first translation mechanism 1121 and the second translation mechanism 1122 can adopt any one of the existing technologies. In this embodiment, a screw slide rail structure is adopted, and the first translation mechanism 1121 is powered by the first transverse motor 1123, and the second translation mechanism 1122 is powered by the second transverse motor 1124.

[0052] The material taking device of the present invention can realize accurate loading of the end cover plate 103 by providing a material taking lifting mechanism 111 and a material taking translation mechanism 112 .

[0053] The material picking lifting mechanism 111 includes a lifting motor 1114, a rotating cylinder 1112, a clamping cylinder 1111 and a material picking claw 1113. The material picking claw 1113 is installed on the clamping cylinder 1111, the clamping cylinder 1111 is installed on the rotating cylinder 1112, and the rotating cylinder 1112 is installed on the lifting motor 1114; the clamping cylinder 1111 drives the material picking claw 1113 to open and close, the rotating cylinder 1112 drives the clamping cylinder 1111 and the material picking claw 1113 to rotate, and the lifting motor 1114 drives the rotating cylinder 1112, the clamping cylinder 1111 and the material picking claw 1113 to rise and fall.

[0054] The material picking lifting mechanism 111 of the present invention comprises a lifting motor 1114, a rotating cylinder 1112, a clamping cylinder 1111 and a material picking clamp 1113. Through the cooperation of the motor and the cylinder, the material picking clamp 1113 can be positioned at any position in space.

[0055] like Figure 1 , Figure 2 As shown, optionally, the battery module end cover plate assembly device may further include a cache portion 20 , which is located between the material taking portion 10 and the transportation portion 30 and is used to move the end cover plate from the material taking portion 10 to the transportation portion 30 .

[0056] The present invention realizes temporary storage of the end cover plate 103 by providing a buffer unit 20, thereby saving loading time.

[0057] like Figure 6 , Figure 7 As shown, the buffer section 20 includes a transverse device 21 and a clamping device 22, and the clamping device 22 is installed on the transverse device 21. The clamping device 22 includes a clamping cylinder 221, a lifting cylinder 222, a cache clamping cylinder 223 and a cache clamping claw 224; the cache clamping claw 224 is installed on the cache clamping claw cylinder 223, the cache clamping claw cylinder 223 is installed on the lifting cylinder 222, the lifting cylinder 222 is installed on the clamping cylinder 221, and the clamping cylinder 221 is installed on the transverse device 21. The transverse device 21 drives the clamping device 22 to move horizontally, the clamping cylinder 221 drives the lifting cylinder 222 and the cache clamping claw cylinder 223 to move horizontally, the lifting cylinder 222 drives the cache clamping claw cylinder 223 to rise and fall, and the cache clamping claw cylinder 223 drives the cache clamping claw 224 to open and close.

[0058] The buffer section 20 of the present invention includes a transverse moving device 21 and a clamping and conveying device 22. The transverse moving device 21 cooperates with the clamping and conveying device 22 to convey the temporarily stored end cover plate 103 to the transportation section 30, which can further improve production efficiency.

[0059] An extension cylinder 212 may be installed between the transverse moving device 21 and the clamping device 22. The extension cylinder 212 is installed on the transverse moving device 21, and the clamping device 22 is installed on the extension cylinder 212. The extension cylinder 212 drives the clamping device 22 to move horizontally.

[0060] The buffer section 20 of the present invention can increase the stroke of the transverse movement device 21 and improve the adaptability of the buffer section 20 by providing an extension cylinder 212 .

[0061] like Figure 8 , Fig. 9 and Fig.10 As shown, the fixture 31 includes a fixing device 311 and a pressing device 312 . The fixing device 311 is used to fix the battery module 101 , and the pressing device 312 is used to press the end cover plate 103 onto the battery module 101 .

[0062] The fixture 31 of the present invention includes a fixing device 311 and a pressing device 312 , which can realize the positioning of the battery module 101 and the assembly of the end cover plate 103 .

[0063] The fixing device 311 includes a platform bracket 3112, a fixing plate 3113 and a fixing cylinder 3111. There are four fixing plates 3113, which are divided into two groups. The two groups of fixing plates are respectively installed on opposite sides of the platform bracket 3112. There are two fixing cylinders 3111, each of which is connected to one group of fixing plates. The two fixing cylinders 3111 respectively drive the two groups of fixing plates to move relative to each other, thereby approaching or moving away from the platform bracket 3112, thereby achieving the function of fixing or loosening the battery module 101.

[0064] The fixing device 311 of the fixture 31 of the present invention uses a cylinder to drive the fixing plate 3113 to fix the battery module 101, and has a simple structure.

[0065] There are two groups of clamping devices 312, which are respectively installed on the other two opposite sides of the platform bracket 3112, that is, the two sides corresponding to the installation position of the end cover plate 103. Fig.10 As shown, each group of clamping devices 312 includes a telescopic cylinder 3121, an end cover plate clamping cylinder 3122 and an end cover plate clamping cylinder 3123. The end cover plate clamping cylinder 3122 is equipped with a fixture clamping claw 3124. The end cover plate clamping cylinder 3123 is installed on the end cover plate clamping cylinder 3122. The end cover plate clamping cylinder 3122 is installed on the telescopic cylinder 3121. The end cover plate clamping cylinder 3122 drives the fixture clamping claw 3124 to clamp the end cover plate 103 transported by the material taking part 10 or the buffer part 20. The two telescopic cylinders 3121 act simultaneously to drive the end cover plate clamping cylinder 3122 to approach or move away from the fixing device 311, and the end cover plate clamping cylinder 3123 drives the end cover plate 103 to be pressed against the battery module 101.

[0066] The present invention realizes the assembly of the end cover plate 103 onto the battery module 101 through the pressing device 312 , and has high reliability.

[0067] like Figure 1 , Figure 2 As shown, the fixture 31 is installed on the conveying device 32. The conveying device 32 includes a motor 321, a long guide rail 322 and a screw rod (not shown in the figure). The platform bracket 3112 of the fixture 31 is installed on the screw rod, and the motor 321 drives the screw rod to rotate, thereby driving the fixture 31 to move along the long guide rail 322.

[0068] like Figure 1 , Figure 2 As shown, the unloading part 40 is installed at the discharge end of the transport part 30. Fig.11 , Fig.12 As shown, the unloading part 40 includes a handling device 41 and a lifting device 42, and the lifting device 42 is located below the handling device 41. The handling device 41 picks up the battery module assembly 100 delivered by the transportation part 30 and places it on the lifting device 42, and the lifting device 42 descends to send the battery module assembly 100 to the next station. The handling device 41 and the lifting device 42 can adopt any one of the existing technologies, and the present embodiment also adopts a screw slide rail structure. A positioning structure for positioning the battery module assembly 100 can also be installed on the lifting device 42.

[0069] The unloading part 40 of the present invention includes a transport device 41 and a lifting device 42, which can remove the assembled battery module assembly 100 and send it to the next station, thereby improving the production efficiency of the next station.

[0070] The working process of the present invention is as follows:

[0071] 1. The previous station places the battery module 101 on the jig 31 of the transport unit 30; the two fixed cylinders 3111 on the jig 31 respectively drive the fixed plates 3113 on both sides of the battery module 101 to fix the battery module 101 on the platform bracket 3112; then the conveying device 32 starts to convey the jig 31, and the jig 31 stops when it reaches the cache unit 20;

[0072] 2. The two material-retrieving claws 1113 of the material-retrieving part 10 descend to grab the end cover plate 103, and then approach the cache part 20 under the joint action of the lifting motor 1114, the first transverse motor 1123, and the second transverse motor 1124;

[0073] 3. The lateral movement cylinder 211 of the buffer section 20 drives the extension cylinder 212 and the clamping and conveying device 22 to approach the material taking section 10; the extension cylinder 212 drives the clamping and conveying device 22 to approach the material taking section 10;

[0074] 4. After the lateral movement cylinder 211 and the extension cylinder 212 have finished their operations, the lifting cylinder 222 drives the cache clamp 224 to rise, and then the material taking clamp 1113 brings the end cover plate 103 to align with the cache clamp 224 of the cache section 20, and the clamp cylinder 223 of the cache section 20 drives the cache clamp 224 to clamp the end cover plate 103, and then the material taking clamp 1113 is released, and the material taking section 10 returns to its original position to prepare for taking materials again;

[0075] 5. The traverse cylinder 211 and the extension cylinder 212 work together to drive the clamping device 22 to approach the fixture 31 on the transport part 30, and then the pressing cylinder 221 pushes the cache clamp 224, and the lifting cylinder 222 lowers the cache clamp 224 to align with the fixture clamp 3124;

[0076] 6. The fixture jaws 3124 clamp the end cover plate 103, and then the cache jaws 224 release the end cover plate 103;

[0077] 7. The clamping cylinder 221 drives the clamping device 22 away from the fixture clamping claw 3124, and then the lifting cylinder 222 raises the clamping device 22;

[0078] 8. Under the action of the extension cylinder 212 and the transverse cylinder 211, the buffer section 20 moves closer to the material taking section 10 and away from the fixture 31, preparing for the next transfer of the end cover plate 103; the end cover plate 103 on one side of the battery module 101 is transferred first, and then the end cover plate 103 on the other side of the battery module 101 is transferred;

[0079] 9. After the end cover plates 103 on both sides have been transferred, the telescopic cylinder 3121 of the fixture 31 makes the clamping device 312 approach the battery module 101. After reaching the position, the two end cover plate clamping cylinders 3123 of the fixture 31 simultaneously drive its connecting plate to push the end cover plate 103, so that the buckle 1031 of the end cover plate 103 is buckled on the battery module 101. Then, the two end cover plate clamping cylinders 3123 drive the connecting plate to retreat, and the telescopic cylinder 3121 makes the clamping device 312 away from the battery module 101;

[0080] 10. The conveying device 32 continues to transport the jig 31 to the lower material portion 40 and stops at the handling device 41 of the lower material portion 40;

[0081] 11. The fixing device 311 of the fixture 31 releases the battery module assembly 100, and the transport device clamps the battery module assembly 100 and transports it to the lifting device 42 for unloading and proceeds to the next station.

[0082] The present invention has been described in sufficient detail with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present invention should fall within the scope of protection of the present invention. The scope of protection claimed by the present invention is defined by the claims, rather than by the above description in the embodiments.

Claims

1. A battery module end cover assembly device, used to assemble the end cover onto the battery module, characterized in that: The battery module end cover assembly device comprises a material taking part, a transport part and a material unloading part; wherein: The material taking part is used to move the end cover plate to the transport part; The transport unit includes a conveying device and a jig mounted on the conveying device, wherein the jig is used to fix the battery module; the jig receives the end cover plate sent by the material taking unit, and assembles the end cover plate onto the battery module to form a battery module assembly; The unloading portion is used to remove the battery module assembly from the transport portion; The battery module end cover plate assembly device further includes a buffer portion, which is located between the material taking portion and the transportation portion and is used to move the end cover plate from the material taking portion to the transportation portion; The material picking section includes a first material picking device, a second material picking device and a lifting device. The lifting device is used to lift the end cover plate from the end cover plate conveying device to the first material picking device or the second material picking device. The first material picking device and the second material picking device respectively transport one end cover plate to the cache section.

2. The battery module end cover assembly device according to claim 1, characterized in that: The first material picking device includes a material picking lifting mechanism and a material picking translation mechanism, the material picking translation mechanism includes a first translation mechanism and a second translation mechanism, the material picking lifting mechanism is installed on the first translation mechanism, and the first translation mechanism is installed on the second translation mechanism; the material picking lifting mechanism drives the end cover plate to rise and fall, the material picking lifting mechanism moves along the first horizontal direction driven by the first translation mechanism, and the first translation mechanism moves along the second horizontal direction driven by the second translation mechanism.

3. The battery module end cover assembly device according to claim 2, characterized in that: The material picking and lifting mechanism includes a lifting motor, a rotating cylinder, a clamping cylinder and a material picking claw. The material picking claw is installed on the clamping cylinder, the clamping cylinder is installed on the rotating cylinder, and the rotating cylinder is installed on the lifting motor; the clamping cylinder drives the material picking claw to open and close, the rotating cylinder drives the clamping cylinder and the material picking claw to rotate, and the lifting motor drives the rotating cylinder, the clamping cylinder and the material picking claw to rise and fall.

4. The battery module end cover assembly device according to claim 1, characterized in that: The cache section includes a transverse movement device and a clamping device, and the clamping device includes a clamping cylinder, a lifting cylinder, a cache clamp cylinder and a cache clamp; the cache clamp is installed on the cache clamp cylinder, the cache clamp cylinder is installed on the lifting cylinder, the lifting cylinder is installed on the clamping cylinder, and the clamping cylinder is installed on the transverse movement device; the transverse movement device drives the clamping device to move horizontally, the clamping cylinder drives the lifting cylinder and the cache clamp cylinder to move horizontally, the lifting cylinder drives the cache clamp cylinder to rise and fall, and the cache clamp cylinder drives the cache clamp to open and close.

5. The battery module end cover assembly device according to claim 4, characterized in that: An extension cylinder is also installed between the transverse moving device and the clamping device. The extension cylinder is installed on the transverse moving device, and the clamping device is installed on the extension cylinder. The extension cylinder drives the clamping device to move horizontally.

6. The battery module end cover assembly device according to claim 1, characterized in that: The fixture includes a fixing device and a pressing device, wherein the fixing device is used to fix the battery module, and the pressing device is used to press the end cover plate onto the battery module.

7. The battery module end cover assembly device according to claim 6, characterized in that: The fixing device comprises a platform bracket, a fixing plate and a fixing cylinder. The fixing plate is installed on two opposite sides of the platform bracket, and the fixing cylinder drives the fixing plate to approach or move away from the platform bracket.

8. The battery module end cover assembly device according to claim 7, characterized in that: The clamping device is installed on the other opposite sides of the platform bracket, and the clamping device includes a telescopic cylinder, an end cover plate clamping cylinder and an end cover plate clamping cylinder. The end cover plate clamping cylinder is installed on the end cover plate clamping cylinder, and the end cover plate clamping cylinder is installed on the telescopic cylinder. The end cover plate clamping cylinder is used to clamp the end cover plate transported by the material picking part. The telescopic cylinder drives the end cover plate clamping cylinder to approach or move away from the fixing device, and the end cover plate clamping cylinder drives the end cover plate to be pressed against the battery module.

9. The battery module end cover assembly device according to claim 1, characterized in that: The unloading part is installed at the discharge end of the transport part, and the unloading part includes a handling device and a lifting device. The handling device clamps the battery module assembly transported by the transport part and places it on the lifting device. The lifting device descends to send the battery module assembly to the next workstation.

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