Battery cell transfer device

Abstract

The utility model discloses a battery cell transfer device which comprises a suction mechanism, the suction mechanism can be used for placing materials in a clamp in the A direction, a spot welding mechanism synchronously moving with the suction mechanism is arranged on one side of the suction mechanism, and the spot welding mechanism is connected with the suction mechanism through a mounting frame; in the transferring process, the interfaces of the upper aluminum plastic film and the lower aluminum plastic film are embedded and tightly combined together through the heat sealing points on the air bag, the aluminum plastic films can wrap the naked battery cell, meanwhile, the aluminum plastic film for transferring the naked battery cell cannot be opened under the action of the force of the heat sealing points, the suction nozzle cannot break vacuum, the battery cell is prevented from falling off and being scratched, the transferring yield of the battery cell is improved, and the working efficiency is improved. And the spot welding mechanism and the suction mechanism synchronously move, so that the time length is not increased on the basis of the original process, the working efficiency is not influenced, and the stability of the battery cell in the transfer process can be effectively ensured.

Description

Technical Field

[0001] This utility model relates to the field of soft-pack battery technology, and in particular to a cell transfer device. Background Technology

[0002] Driven by strong demand in the new energy market, my country's battery industry has achieved rapid growth. Its soft-pack battery cells, due to their flexibility and customizability, have been widely used in many fields and have ushered in rapid development.

[0003] After stacking, the bare cells are welded with tabs. They are then placed in a pre-stamped aluminum-plastic film. To absorb gases generated during cell charging and discharging or abnormal conditions (such as overcharging or high temperature), prevent the aluminum-plastic film from rupturing, and facilitate electrolyte injection, an air pocket is formed on one side of the film that is open to the outside. Unlike prismatic batteries, pouch batteries undergo multiple stages of packaging, resulting in a long and complex process. This long process, including cell production and transfer, requires extensive equipment coordination and personnel involvement. Furthermore, the current automation level of pouch batteries is relatively low, leading to a combination of transfer problems, which to some extent limits the development of pouch batteries. During transfer, heavier cells can easily pull open the aluminum-plastic film, disrupting the vacuum of the suction cups and causing cells to fall during transport. Therefore, reducing cell loss, scratches, and abrasions during transfer, and improving cell yield, is a pressing technical problem in battery technology. Utility Model Content

[0004] The purpose of this utility model is to provide a battery cell transfer device that solves the problem of instability of battery cells during the transfer process.

[0005] This utility model is implemented as follows: a battery cell transfer device includes a suction mechanism, which can be used to place materials in a fixture along direction A. A spot welding mechanism is provided on one side of the suction mechanism and moves synchronously with the suction mechanism. The spot welding mechanism and the suction mechanism are connected by a mounting frame.

[0006] After stacking, bare cells are welded with tabs and then placed in pre-stamped aluminum-plastic film. To absorb gases generated during cell charging / discharging or abnormal conditions, prevent the aluminum-plastic film from rupturing, and facilitate electrolyte injection, an air bag is formed on one side of the aluminum-plastic film that is open to the outside. However, during cell transfer, vacuum breaks can occur when the cell is picked up, leading to cell loss and instability during transfer. To address this issue, this invention employs a simultaneous spot welding mechanism that melts a heat seal point on the air bag while the encapsulated cell is placed into the fixture. During transfer, the heat seal point on the air bag tightly seals the upper and lower aluminum-plastic films, ensuring the film encloses the bare cell. Furthermore, the aluminum-plastic film remains intact under the heat seal point's force, preventing vacuum breakage and cell loss, thus improving transfer yield. Since the spot welding and picking mechanisms move synchronously, the process is not extended, ensuring stability during cell transfer without affecting efficiency.

[0007] A further technical solution of this utility model is: the spot welding mechanism and the mounting frame are connected by an elastic component for buffering the spot welding mechanism in the A direction.

[0008] The spot welding mechanism and the suction mechanism move synchronously. When the suction mechanism places the battery cell into the fixture, the spot welding mechanism simultaneously completes the spot welding of the battery cell air bag. When the spot welding mechanism is spot welding the air bag, in order to avoid the spot welding end of the spot welding mechanism from scratching or abrading the air bag, the spot welding mechanism and the installation mechanism are connected by an elastic component to form a buffer in direction A.

[0009] A further technical solution of this utility model is: the elastic component includes connecting members arranged vertically and vertically, and a spring placed between the connecting members. The connecting member above the spring is connected to the mounting bracket, and the connecting member below the spring is connected to the spot welding mechanism. This elastic component has high stability.

[0010] A further technical solution of this utility model is: the spot welding mechanism includes a hot melt head, and the end of the hot melt head is a plane.

[0011] To avoid damage to the air bag, the end of the hot melt head of the spot welding mechanism is flat.

[0012] A further technical solution of this utility model is: the spot welding mechanism is used to spot weld the middle part of the air bag on one side of the battery cell.

[0013] When the air bag is on one side of the battery cell body and the spot weld is in the middle of the air bag, the suction mechanism will be subjected to uniform force when suctioning the battery cell.

[0014] A further technical solution of this utility model is: the suction mechanism includes a connecting part and a suction cup placed at one end of the connecting part, and the mounting bracket is placed in the connecting part.

[0015] A further technical solution of this utility model is: the upper surface of the fixture is provided with a raised platform for supporting the spot welding of the battery cell air bag and a receiving part for accommodating the battery cell.

[0016] When the battery cell is placed into the fixture, the air bag is higher than the receiving part and contacts the raised platform. At this time, the spot welding mechanism and the raised platform cooperate to form a spot weld on the air bag.

[0017] A further technical solution of this utility model is that the upper surface of the raised platform can be parallel to and in contact with the air bag of the battery cell. Spot welding of the air bag will not cause damage to the air bag.

[0018] The beneficial effects of this utility model are as follows: After the wafers are stacked, the bare cells are welded with tabs and then placed in a pre-stamped aluminum-plastic film. To absorb the gas generated during cell charging and discharging or abnormal conditions, prevent the aluminum-plastic film from breaking, and facilitate liquid injection, an air bag that can communicate with the outside is formed on one side of the aluminum-plastic film. However, during the cell transfer process, vacuum breaks can occur when the cells are picked up, leading to cells falling out during transfer and making the transfer process unstable. To address this technical problem, the suction mechanism of this utility model places the packaged cells into the clamp during the process... The synchronous spot welding mechanism melts a heat seal point on the air bag. During the transfer process, the heat seal point on the air bag tightly fits the upper and lower aluminum-plastic film interfaces together, which will make the aluminum-plastic film cover the bare battery cell. At the same time, the aluminum-plastic film will not open under the action of the heat seal point during the transfer of the bare battery cell, and the suction nozzle will not break the vacuum, preventing the battery cell from falling or being scratched or abraded, thus improving the yield of battery cell transfer. Moreover, since the spot welding mechanism and the suction mechanism move synchronously, it will not increase the time on the basis of the original process, so it will not only not affect the work efficiency, but also effectively ensure the stability of the battery cell transfer process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a battery cell transfer device provided by this utility model;

[0020] Figure 2 This is a cross-sectional view of the battery cell provided by this utility model after it has been placed into the fixture.

[0021] Attached reference numerals: 1. Battery cell, 12. Aluminum-plastic film, 13. Bare battery cell, 14. Air bag, 15. Air bag heat melting point.

[0022] 2. Suction mechanism, 21. Suction cup,

[0023] 3. Mounting bracket,

[0024] 4. Spot welding mechanism; 41. Fixing cap; 42. Spring; 43. Hot melt head; 44. Fixing nut.

[0025] 5. Raised platform; 6. Fixture. Detailed Implementation

[0026] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0027] Example 1:

[0028] Figure 1-2 A battery cell transfer device is shown, including a suction mechanism 2, which can be used to place materials in a clamp 6 along direction A. A spot welding mechanism 4 is provided on one side of the suction mechanism 2 and moves synchronously with the suction mechanism 2. The spot welding mechanism 4 is connected to the suction mechanism 2 through a mounting frame 3.

[0029] In this embodiment, the spot welding mechanism 4 and the mounting frame 3 are connected by an elastic component for buffering the spot welding mechanism 4 in the A direction.

[0030] The spot welding mechanism 4 moves synchronously with the suction mechanism 2. When the suction mechanism 2 places the battery cell 1 in the fixture 6, the spot welding mechanism 4 simultaneously completes the spot welding of the air bag 14 of the battery cell 1. When the spot welding mechanism 4 is spot welding the air bag 14, in order to avoid the spot welding end of the spot welding mechanism 4 from scratching or abrading the air bag 14, the spot welding mechanism 4 and the mounting frame 3 are connected by an elastic component to form a buffer in the A direction.

[0031] In this embodiment, the elastic component includes vertically arranged connectors 41 and a spring 42 positioned between the connectors 41. The connector 41 above the spring 42 is connected to the mounting bracket 3, and the connector 41 below the spring 42 is connected to the spot welding mechanism 4. This elastic component has high stability.

[0032] In this embodiment, the spot welding mechanism 4 passes through the mounting bracket 3.

[0033] In this embodiment, the spot welding mechanism 4 includes a hot melt head 43, the end of which is a plane.

[0034] To avoid damage to the air bag, the end of the hot melt head 43 of the spot welding mechanism 4 is flat.

[0035] In this embodiment, the spot welding mechanism 4 is used to spot weld the middle part of the air bag on one side of the battery cell.

[0036] When the air bag 14 is on one side of the battery cell body and the spot weld is in the middle of the air bag 14, the suction mechanism 2 will be subjected to uniform force when suctioning the battery cell 1.

[0037] In this embodiment, the suction mechanism 2 includes a connecting part and a suction cup 21 placed at one end of the connecting part, and the mounting bracket 3 is placed in the connecting part.

[0038] In this embodiment, the upper surface of the fixture 6 is provided with a raised platform 5 for supporting the spot welding of the battery cell air bag 14 and a receiving part for accommodating the battery cell 1.

[0039] When the battery cell 1 is placed into the fixture 6, the air bag 14 is higher than the receiving part and contacts the raised platform 5. At this time, the spot welding mechanism 4 and the raised platform 5 cooperate to form the air bag hot melting point 15 on the air bag 14.

[0040] In this embodiment, the upper surface of the raised platform 5 is parallel to and in contact with the air bag 14 of the battery cell 1. Spot welding of the air bag 14 will not cause damage to the air bag 14.

[0041] In this embodiment, the spot welding end of the spot welding mechanism 4 is lower than the suction end of the suction mechanism 2.

[0042] In this embodiment, the encapsulated battery cell 1 includes an aluminum-plastic film 12 encapsulating the bare battery cell, a bare battery cell 13, and a pre-reserved air bag 14; the spot welding mechanism 2 includes an electric arc lamp and a hot melt head 43, and the elastic component includes two upper and lower fixing caps 41, a spring 42, and a fixing nut 44. The fixing cap 41 above the spring 42 is connected to the mounting frame 3 through the fixing nut 44, and the fixing cap 41 below the spring 42 is connected to the electric arc lamp through another fixing nut 44. The electric arc lamp can provide vertical cushioning along the mounting frame 3.

[0043] In this embodiment, a clamp 6 for a battery cell tray is provided below the suction mechanism 2, and a raised platform 5 for hot-melting the battery cell is provided on the clamp 6; the suction mechanism 2 picks up the battery cell 1 and places it into the clamp 6 of the battery cell tray in direction A, and the synchronous spot welding mechanism 4 hot-melts an air bag hot-melt point 15 on the air bag 14 of the raised platform 5. Since there is a hot-melt raised platform 5 at the bottom, the suction mechanism 2 does not perform hot-melt when picking up the material; the rear end of the electroplating pen is connected to an electroplating temperature regulator.

[0044] Since the spot welding mechanism 4 requires time to heat up, in order to ensure efficiency, in this embodiment, the spot welding mechanism 4 starts heating while the suction mechanism 2 is transferring the battery cell 1 to the fixture 6, so that the spot welding mechanism 4 can complete the spot welding simultaneously when the suction mechanism 2 transfers the battery cell 1 to the fixture 6, thus not affecting efficiency due to spot welding.

[0045] In this embodiment, the suction mechanism 2 is used to pick up the packaged battery cell 1 and place it into the clamp 6 of the battery cell tray. The synchronous hot melt head 43, supported by the raised platform 5, heat melts a point on the air bag 14. When the hot melt head 43 contacts the aluminum-plastic film air bag 14, a set of springs 42 fixed by the fixing nut 44 on the electric stylus pen buffers and prevents the aluminum-plastic film 14 from being scratched during the hot melt. When the battery cell 1 is hot melted, the position of the hot melt point should be greater than the position of the second seal.

[0046] The principle of preventing battery cells from falling is as follows: The suction mechanism 2 picks up the packaged battery cell 1 and places it into the clamp 6 of the battery cell tray. The synchronous hot melt head 43 melts the aluminum-plastic film air bag 14 at the raised platform 5 of the battery cell hot melt point, completing the hot melt point heat sealing of the air bag 14. When the suction cup 21 of the suction mechanism 2 picks up the packaged battery cell 1, the battery cell 1 is relatively heavy. After the aluminum-plastic film air bag 14 is hot melted and sealed, the aluminum-plastic film will not open, and the suction cup 21 will not break the vacuum. This can effectively prevent the battery cell 1 from falling and being scratched or abraded.

[0047] In this embodiment, the hot-melt pen melts the gas bag hot-melt point 15 on the raised platform 5 of the cell hot-melt point. The gas bag hot-melt point 15 is located at the halfway point of the height direction of the gas bag 14. The spot welding mechanism 4 is fixed to the mounting frame 3 with the fixing nut 44. The spring 42 prevents the hot-melt head 43 from scratching the packaged cell 1 and plays a buffering role. The hot-melt head 43 melts the aluminum-plastic film gas bag 14 on the raised platform 5 of the cell hot-melt point to form the gas bag hot-melt point 15. When the suction cup 2 picks up the packaged cell 1 in the subsequent process, the bare cell 13 is heavier than the aluminum-plastic film gas bag hot-melt point 15. After the aluminum-plastic film gas bag hot-melt point 15 is heat-sealed, the aluminum-plastic film will not open, and the suction cup 21 will not break the vacuum, preventing the packaged cell 1 from falling and the cell from being scratched or abraded. This forms the gas bag hot-melt device of the present invention for preventing the cell from falling and scratching during the packaging and transportation process of the stacked cell.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery cell transfer device, comprising a suction mechanism (2), the suction mechanism (2) being capable of placing material into a clamp (6) along direction A, characterized in that: The suction mechanism (2) is provided with a spot welding mechanism (4) that moves synchronously with the suction mechanism (2) on one side. The spot welding mechanism (4) and the suction mechanism (2) are connected by a mounting bracket (3).

2. The cell transfer device according to claim 1, characterized in that: The spot welding mechanism (4) is connected to the mounting frame (3) by an elastic component for buffering the spot welding mechanism (4) in the A direction.

3. The cell transfer device according to claim 2, characterized in that: The elastic component includes a connector (41) arranged vertically and a spring (42) placed between the connector (41). The connector (41) above the spring (42) is connected to the mounting bracket (3), and the connector (41) below the spring (42) is connected to the spot welding mechanism (4).

4. A cell transfer device according to any one of claims 1-3, characterized in that: The spot welding mechanism (4) includes a hot melt head (43), the end of which is flat.

5. A cell transfer device according to any one of claims 1-3, characterized in that: The spot welding mechanism (4) is used to spot weld the middle part of the air bag on one side of the battery cell.

6. A cell transfer device according to any one of claims 1-3, characterized in that: The suction mechanism (2) includes a connecting part and a suction cup (21) placed at one end of the connecting part, and the mounting bracket (3) is placed in the connecting part.

7. A cell transfer device according to any one of claims 1-3, characterized in that: The upper surface of the fixture (6) is provided with a raised platform (5) for supporting the spot welding of the battery cell air bag and a receiving part for accommodating the battery cell.

8. The cell transfer device according to claim 7, characterized in that: The upper surface of the raised platform (5) can be parallel to and in contact with the air bag of the battery cell.

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