CN217627140U - Battery module lifting appliance with pocket bottom structure - Google Patents
Battery module lifting appliance with pocket bottom structure Download PDFInfo
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- CN217627140U CN217627140U CN202221895350.5U CN202221895350U CN217627140U CN 217627140 U CN217627140 U CN 217627140U CN 202221895350 U CN202221895350 U CN 202221895350U CN 217627140 U CN217627140 U CN 217627140U
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- mounting plate
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- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 9
- 230000013011 mating Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000012857 repacking Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000004806 packaging method and process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a battery module hoist with pocket substructure, including the hoist main part that is used for lifting by crane the battery module, the both sides of hoist main part are equipped with the backup pad, the vertical lateral part space region who aligns the battery module of backup pad, be provided with a plurality of pocket substructure in the backup pad, pocket substructure includes the guide bar, along the vertical gliding mounting panel of guide bar, the actuating mechanism of setting on the mounting panel with fix the couple on actuating mechanism output shaft, the couple includes peg and the hanging piece of vertical fixation in the peg bottom, the top screw thread of peg closes soon and passes the backup pad, and through trompil and actuating mechanism's output shaft fixed connection. Rotate the peg through actuating mechanism, under the mating reaction of screw hole and external screw thread, convert the rotation of peg into and reciprocate, and then drive the hanging piece and reciprocate when the peg axis is rotatory, realize the hanging piece at the bottom screw in of battery module and screw out, realize improving the security of hoist and mount process automatically at the bottom of the pocket of battery module.
Description
Technical Field
The utility model relates to a battery module production technical field, concretely relates to battery module hoist with pocket bottom structure.
Background
With the development of the power battery industry, abundant construction experience and a large number of cases of landing application exist in the aspects of battery modules, automatic production lines of packaging and the like, and the technology covers various processes such as battery core sorting and feeding, plasma cleaning, gluing, battery stacking, side plate laser welding, hoisting and the like. Current battery module hoist and mount hoist mostly lacks pocket substructure at the in-process of operation battery module, when the battery module dropped appearing in the handling process, lacks safeguard measure, and is pure in the potential safety hazard, to battery module and handling equipment workman and equipment all probably noise damage on every side.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a battery module hoist with pocket bottom structure, at the in-process with battery module allocation and transportation, carry out the protection at the bottom of the pocket to battery module automatically, reduce the risk that battery module dropped, improve the production security.
In order to solve the technical problem, the utility model discloses a battery module hoist with pocket bottom structure, including the hoist main part, the hoist main part is used for lifting by crane the battery module, the both sides of hoist main part are provided with the backup pad that the level was arranged respectively, the backup pad is vertical to be aligned the lateral part space region of battery module, be provided with a plurality of pocket bottom structures in the backup pad, pocket bottom structure is including fixing guide bar in the backup pad, edge the vertical gliding mounting panel of guide bar, setting are in actuating mechanism on the mounting panel with fix actuating mechanism goes out epaxial couple, the couple is L shape, include along the peg that vertical direction arranged with the vertical fixation the hanger piece of hanger piece bottom, the top of hanger piece is provided with the external screw thread, be provided with in the backup pad with the screw hole of external screw thread adaptation, the mounting panel corresponds hanger piece department is provided with the trompil, the top screw thread of hanger piece closes soon and passes the backup pad, and warp the trompil with actuating mechanism's output shaft fixed connection, actuating mechanism drive the hanger piece is rotatory, makes when hanger piece upwards moves the bottom of battery module, or when downwards the screw in battery module the screw in the drive the dog first limit of dog the backup pad is provided with the first limit structure dog removal.
In the above-mentioned battery module hoist with pocket end structure, rotate the peg through actuating mechanism, under the mating reaction of screw hole and external screw thread, convert the rotation of peg into and reciprocate, and then drive the peg and reciprocate around the rotatory while of peg axis, realize the peg at the bottom screw in of battery module and screw out, promptly before lifting by crane battery module, with the upwards rotatory removal of peg, leave the position just to battery module, make the hoist main part have sufficient space and hang battery module, after lifting by crane battery module, with the downward rotatory removal of peg, the bottom of screw in battery module, thereby automatically realize the pocket end to battery module, improve the security of hoist and mount process, and automatically realize the rotatory removal of peg through control system control actuating mechanism, need not manual operation, save the manpower, and also improve the efficiency.
As the utility model discloses the improvement of battery module hoist with pocket bottom structure, the link block is rectangular form, works as first dog with when the backup pad contact is spacing, the main part perpendicular to of link block the side of battery module, and be located the bottom of battery module.
Through the decurrent maximum stroke of first dog restriction peg, the peg is in the bottom of battery module along with the peg when the extreme lower position of the rotatory removal downwards, carries out the protection at the bottom of the pocket, and the perpendicular battery module side of main part of peg this moment, then the peg main part is longest at the width direction of battery module, and protection effect is best at the bottom of the pocket.
Furthermore, in order to ensure that the hanging block cannot interfere with the battery module in the screwing-out process, when the first stop block is in contact with the support plate for limitation, the distance between the top surface of the hanging block and the bottom surface of the battery module is not less than one fourth of the pitch of the external thread. The hanging block is screwed out from the bottom of the battery module and rotates at least 90 degrees, and meanwhile the hanging block moves upwards by at least one fourth of the thread pitch of the external thread in the rotating process.
As the utility model discloses another kind of improvement of battery module hoist with pocket bottom structure, the top of guide bar all is provided with the second dog, the second dog with the mounting panel constitutes limit structure, restriction the mounting panel gliding distance that makes progress, thereby the restriction the maximum stroke of peg rebound.
The driving mechanism is fixed on the mounting plate, the output shaft of the driving mechanism is fixed with the hanging rod, so that the mounting plate can drive the driving mechanism to move in the vertical direction along with the hanging rod, the upward movement fixed point of the mounting plate is limited by the second stop block, and the upward movement maximum stroke of the hanging rod is limited.
Furthermore, in order to reduce the space occupied by the hanging block after the hanging block is screwed out from the bottom of the battery module, when the second stop block is in contact with the mounting plate for limitation, the main body of the hanging block is parallel to the side face of the battery module, and the bottom face of the hanging block is higher than the bottom face of the battery module. Make the hanging piece after the back of unscrewing like this, remove parallel battery module length direction after, keep motionless, it is limited to occupy the space of battery module lateral part, design benefit saves the space occupation of hoist.
Furthermore, the sliding stroke of the mounting plate on the guide rod is equal to three-fourths of the thread pitch of the external thread, so that the hanging block reaches an upward stroke end point through rotation, the action stroke is saved, the action is rapid, the time is saved, and the design is ingenious.
Further, when the first stop block is in contact with the support plate for limiting, the distance between the bottom surface of the hanging block and the bottom surface of the battery module is not more than three quarters of the thread pitch of the external thread. Make the rotatory 270 distances of rebound of hanging piece be greater than the distance of bottom surface and battery module bottom surface when the hanging piece pocket is at the bottom, when guaranteeing that the hanging piece moves to the stroke terminal point, the bottom surface of hanging piece is higher than the bottom surface of battery module, when avoiding the hoist main part to hang battery module, the hanging piece interferes with the holding surface of battery module.
As the utility model discloses battery module hoist with pocket bottom structure's another improvement, the hoist main part includes the edge battery module length direction interval arrangement's horizontal pole, fix two the longeron and the setting of horizontal pole tip are two the seat of hanging at the horizontal pole middle part, the top of hanging the seat is provided with the lug.
Furthermore, the hanging seat comprises a seat body in an inverted groove shape and a seat plate fixed on an opening at the bottom of the seat body, the cross rod vertically penetrates through and is fixed on the side face of the seat body, the seat plate extends towards two sides of the battery module to form the supporting plate, and four bottom pocket structures are arranged at four corners of the seat plate. Form the backup pad through the bedplate extends to both sides, and structural design is ingenious, provides the thinking for reequiping on current hoist.
In conclusion, when the battery module lifting appliance with the bottom pocket structure is used for lifting the battery module, the bottom pocket protection of the battery module is automatically realized, the safety of the lifting process is improved, and the production efficiency is also improved; in addition, simple structure can easily realize repacking at current hoist and make.
Drawings
In the drawings:
fig. 1 is a structural view of the hook of the present invention in the bottom of the pocket.
Fig. 2 is a structural view of the hook of the present invention in a state of being rotated out and retracted.
Fig. 3 is the utility model discloses a pocket bottom structure split structure chart.
Fig. 4 is a structural view of the hanging seat of the present invention.
In the drawing, 1, a hanger body; 11. a cross bar; 12. a longitudinal beam; 13. a hanging seat; 131. a base body; 132. a seat plate; 14. lifting lugs; 2. a battery module; 3. a support plate; 31. a threaded hole; 311. a protrusion; 4. a pocket bottom structure; 41. a guide rod; 411. a second stopper; 42. mounting a plate; 421. opening a hole; 43. a drive mechanism; 44. hooking; 441. a hanging rod; 442. hanging blocks; 443. an external thread; 444. a first stopper; 445. and (4) bracing.
Detailed Description
The following description will further explain embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.
Fig. 1-4 show the utility model relates to a battery module hoist with pocket bottom structure. As shown in fig. 1-3, the lifting device includes a lifting device body 1, the lifting device body 1 is used for lifting a battery module 2, two sides of the lifting device body 1 are respectively provided with a support plate 3 horizontally arranged, the support plate 3 is vertically aligned with a lateral space region of the battery module 2, the support plate 3 is provided with a plurality of bottom pocket structures 4, each bottom pocket structure 4 includes a guide rod 41 fixed on the support plate 3, a mounting plate 42 vertically sliding along the guide rod 41, a driving mechanism 43 arranged on the mounting plate 42 and a hook 44 fixed on an output shaft of the driving mechanism 43, the hook 44 is L-shaped and includes a hanging rod 441 vertically arranged along a vertical direction and a hanging block 442 vertically fixed at a bottom end of the hanging rod 441, a male thread 443 is provided at a top of the hanging rod 441, the support plate 3 is provided with a threaded hole 31 adapted to the male thread 443, the mounting plate 42 is provided with an opening 421 corresponding to the hanging rod 441, the top thread of the hanging rod 441 is screwed to pass through the support plate 3 and is connected with the output shaft of the driving mechanism 43 through the opening 421, the driving mechanism 43 drives the hanging rod to rotate, the hanging block to be screwed out of the bottom of the battery module 2 while moving upwards, and the support plate is provided with a first limit stop 444 is provided at the bottom of the support plate 441. The drive mechanism 43 employs a stepper motor assembly.
When the lifting appliance is used, the lifting appliance main body 1 is moved downwards to be close to the battery module 2 to be lifted, and meanwhile, the stepping motor assembly is controlled to drive the hanging rod 441 to rotate anticlockwise so as to drive the hanging block 442 to rotate upwards, so that a space for hanging the battery module 2 is reserved, the hanging block 442 is prevented from interfering with the battery module 2 and a supporting surface of the battery module 2, and meanwhile, the mounting plate 42 is driven to slide upwards along the guide rod 41; then, after the hanger main body 1 is moved to a proper position, the battery module 2 is hung on the hanger main body 1; then, the hanger main body 1 is moved upwards, the battery module 2 is lifted to a certain height, and then the hanging rod 441 is driven clockwise to rotate, so that the hanging block 442 rotates and moves downwards to the bottom of the battery module 2, and bottom holding is realized; after the action is accomplished at the bottom of last pocket, can remove hoist main part 1 to assembly region, carry out the assembly of battery module 2, anticlockwise rotation peg 441 once more before the assembly, back-out hanging piece 442 can, whole process can be realized through controller control step motor is automatic.
As shown in fig. 3, the hanging block 442 is in a long strip shape, and an inclined strut 445 is arranged at the fixed connection position of the hanging block 442 and the hanging rod 441, so that the connection strength is enhanced, and the safety protection capability of the pocket bottom is improved. The guide rods 41 are four in number and are arranged at four corners of the mounting plate 42, and linear bearings are arranged between the mounting plate 42 and the guide rods 41 to realize vertical sliding.
As shown in fig. 1, when the first stopper 444 contacts and limits the position of the support plate 3, the main body of the hanging block 442 is perpendicular to the side surface of the battery module 2 and is located at the bottom of the battery module 2, i.e., the hook 44 is in a bottom-tucked state, so as to optimally protect the battery module 2. In addition, the height of the pocket bottom of the hanging block 442 can be adjusted by adjusting the position of the first stopper 444 on the hanging rod 441, so that the battery module 2 with different heights can be hoisted.
In order to ensure that the hanging piece 442 does not interfere with the battery module 2 during the unscrewing process, the distance between the hanging piece 442 and the bottom surface of the battery module 2 is not less than one-fourth of the pitch of the external thread 443. The hanging piece 442 is rotated out of the bottom of the battery module 2 by at least 90 deg., while the hanging piece 442 is moved up by at least one-fourth of the pitch of the male screw 443 during the rotation.
As shown in fig. 3, the top ends of the guide rods 41 are provided with second stoppers 411, and the second stoppers 411 and the mounting plate 42 form a limiting structure to limit the upward sliding distance of the mounting plate 42, so as to limit the maximum upward movement stroke of the hanging rod 441.
The mounting plate 42 is fixed with the driving mechanism 43, and an output shaft of the driving mechanism 43 is fixed with the hanging rod 441, so that the mounting plate 42 drives the driving mechanism 43 to move along with the hanging rod 441 in the vertical direction, and the upward movement of the mounting plate 42 is limited to be fixed at a top point through the second stopper 411, that is, the maximum upward movement stroke of the hanging rod 441 is limited.
As shown in fig. 2, the hanging piece 442 is in a rotated-out retracted state, i.e., a state when the hanging piece stops after being rotated out to reach a final position. In order to reduce the space occupied by the hanging block 442 after being screwed out from the bottom of the battery module 2, when the second stopper 411 is in contact with the mounting plate 42 for limitation, the main body of the hanging block 442 is parallel to the side surface of the battery module 2, and the bottom surface of the hanging block 442 is higher than the bottom surface of the battery module 2. Therefore, the hanging block 442 keeps still after being screwed out and moved to the length direction parallel to the battery module 2, the space occupied by the side of the battery module 2 is limited, the design is ingenious, and the space occupied by a lifting appliance is saved.
Optionally, the sliding travel of the mounting plate 42 on the guide rod 41 is equal to three quarters of the pitch of the external thread 443. The hanging block 442 reaches an upward stroke end point through rotating by 270 degrees, the action stroke is saved, the action is rapid, the time is saved, and the design is ingenious.
Optionally, the distance between the bottom surface of the hanging piece 442 and the bottom surface of the battery module 2 is not more than three quarters of the pitch of the external thread 443. The threads of the external thread 443 and the threaded hole 31 are customized. Make the rotatory 270 distances of upward movement of hanging piece 442 be greater than the distance of bottom surface and battery module 2 bottom surface when hanging piece 442 pockets the end, when guaranteeing that hanging piece 442 upwards moves to the stroke terminal, the bottom surface of hanging piece 442 is higher than battery module 2's bottom surface, when avoiding hoist main part 1 to hang battery module 2, hanging piece 442 interferes with battery module 2's holding surface.
As shown in fig. 1, the hanger main body 1 comprises cross rods 11 arranged at intervals along the length direction of the battery modules 2, longitudinal beams 12 fixed at the end parts of the two cross rods 11 and a hanging seat 13 arranged at the middle part of the two cross rods 11, a lifting lug 14 is arranged at the top of the hanging seat 13, the whole hanger main body 1 has high structural strength and a structure in the growth direction, and is suitable for hoisting the battery modules 2 with larger volume
As shown in fig. 4, the hanging seat 13 includes a seat body 131 in an inverted groove shape and a seat plate 132 fixed on an opening at the bottom of the seat body 131, the cross bar 11 vertically penetrates and is fixed on a side surface of the seat body 131, the seat plate 132 extends to two sides of the battery module 2 to form the support plate 3, four pocket bottom structures 4 are arranged at four corners of the seat plate 132, and a protrusion 311 corresponding to the first stopper 444 is arranged at the top of the outer side of the threaded hole 31. Bedplate 132 extends to both sides and forms backup pad 3, and structural design is ingenious, for the repacking provides the thinking on current hoist, can fix one on current hoist to the convex backup pad 3 in both sides, and the function is realized in the light repacking realization pocket end.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope thereof, and although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that: after reading the present disclosure, one of ordinary skill in the art may make various changes, modifications and equivalents to the embodiments of the present disclosure, which are within the scope of the appended claims.
Claims (10)
1. A battery module lifting appliance with a bottom pocket structure is characterized by comprising a lifting appliance body (1), wherein the lifting appliance body (1) is used for lifting a battery module (2), two sides of the lifting appliance body (1) are respectively provided with a support plate (3) which is horizontally arranged, the support plates (3) are vertically aligned with the lateral space area of the battery module (2), a plurality of bottom pocket structures (4) are arranged on the support plates (3), each bottom pocket structure (4) comprises a guide rod (41) fixed on the support plate (3), a mounting plate (42) which vertically slides along the guide rod (41), a driving mechanism (43) arranged on the mounting plate (42) and a hook (44) fixed on an output shaft of the driving mechanism (43), the hook (44) is L-shaped and comprises a hanging rod (441) which is arranged along the vertical direction and a hanging block (442) which is vertically fixed at the bottom end of the hanging rod (441), the top of the hanging rod (441) is provided with an external thread (443), the support plate (3) is provided with a hanging rod (31) which is matched with the external thread hole (443), the mounting plate (42) is correspondingly provided with a screw thread, and a hole (421) is formed in the position where the mounting plate (441) passes through which the screw hole (421) and is connected with the support plate (3), the driving mechanism (43) drives the hanging rod (441) to rotate, so that the hanging block (442) moves upwards and simultaneously screws out of the bottom of the battery module (2) or moves downwards and simultaneously screws into the bottom of the battery module (2), a first stop block (444) is arranged at the joint of the hanging rod (441) and an output shaft of the driving mechanism (43), and the first stop block (444) and the supporting plate (3) form a limiting structure to limit the maximum downward movement stroke of the hanging rod (441).
2. The battery module hanger with the bottom pocket structure according to claim 1, wherein the hanging block (442) is long, a diagonal brace (445) is disposed at a fixed connection between the hanging block (442) and the hanging rod (441), and when the first stopper (444) is in contact with the supporting plate (3) for limiting, a main body of the hanging block (442) is perpendicular to a side surface of the battery module (2) and is located at the bottom of the battery module (2).
3. The battery module hanger with the bottom pocket structure according to claim 2, wherein when the first stopper (444) is in contact limit with the support plate (3), a distance between the top surface of the hanging block (442) and the bottom surface of the battery module (2) is not less than a quarter of a pitch of the external thread (443).
4. The battery module hanger with the bottom pocket structure as claimed in claim 1, wherein the number of the guide rods (41) is four, the guide rods are arranged at four corners of the mounting plate (42), the top ends of the guide rods (41) are provided with second stoppers (411), the second stoppers (411) and the mounting plate (42) form a limiting structure, and limit the upward sliding distance of the mounting plate (42), so as to limit the maximum upward movement stroke of the hanging rod (441).
5. The battery module hanger with a pouch bottom structure as claimed in claim 4, wherein when the second stopper (411) is in contact with the mounting plate (42) for limiting, the main body of the hanging block (442) is parallel to the side surface of the battery module (2), and the bottom surface of the hanging block (442) is higher than the bottom surface of the battery module (2).
6. The battery module hanger with the pocket bottom structure of claim 5, wherein a sliding stroke of the mounting plate (42) on the guide bar (41) is equal to three-quarters of a pitch of the external thread (443).
7. The battery module hanger with the bottom pocket structure according to claim 5 or 6, wherein when the first stopper (444) is in contact with the support plate (3) for limiting, the distance between the bottom surface of the hanging block (442) and the bottom surface of the battery module (2) is not more than three-quarters of the pitch of the external thread (443).
8. The battery module hanger with the bottom pocket structure according to claim 1, wherein the hanger main body (1) comprises cross bars (11) arranged at intervals along the length direction of the battery module (2), longitudinal beams (12) fixed at the ends of the two cross bars (11), and a hanging seat (13) arranged in the middle of the two cross bars (11), and a lifting lug (14) is arranged at the top of the hanging seat (13).
9. The battery module hanger with the bottom pocket structure as claimed in claim 8, wherein the hanger base (13) comprises a base body (131) in the shape of an inverted trough and a base plate (132) fixed on the bottom opening of the base body (131), the cross bar (11) is vertically fixed on the side surface of the base body (131) in a penetrating manner, the base plate (132) extends to two sides of the battery module (2) to form the support plate (3), and four corners of the base plate (132) are provided with four bottom pocket structures (4).
10. The battery module hanger with the pocket bottom structure as claimed in claim 1, wherein a protrusion (311) corresponding to the first stopper (444) is provided at the top of the outer side of the threaded hole (31), and the driving mechanism (43) adopts a stepping motor assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221895350.5U CN217627140U (en) | 2022-07-21 | 2022-07-21 | Battery module lifting appliance with pocket bottom structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221895350.5U CN217627140U (en) | 2022-07-21 | 2022-07-21 | Battery module lifting appliance with pocket bottom structure |
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| Publication Number | Publication Date |
|---|---|
| CN217627140U true CN217627140U (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221895350.5U Active CN217627140U (en) | 2022-07-21 | 2022-07-21 | Battery module lifting appliance with pocket bottom structure |
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| CN (1) | CN217627140U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117059871A (en) * | 2023-10-12 | 2023-11-14 | 宁德时代新能源科技股份有限公司 | Bottom covering device, grabbing equipment, production line and method for replacing type of bottom covering device |
-
2022
- 2022-07-21 CN CN202221895350.5U patent/CN217627140U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117059871A (en) * | 2023-10-12 | 2023-11-14 | 宁德时代新能源科技股份有限公司 | Bottom covering device, grabbing equipment, production line and method for replacing type of bottom covering device |
| CN117059871B (en) * | 2023-10-12 | 2024-03-29 | 宁德时代新能源科技股份有限公司 | Bottom covering device, grabbing equipment, production line and method for replacing type of bottom covering device |
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