Battery secondary packaging device

Abstract

The utility model relates to the technical field of battery manufacturing, and discloses a secondary packaging device for a battery. The battery secondary packaging device comprises a carrying table assembly, an upper sealing head, a lower sealing head and a negative pressure adsorption mechanism, wherein the carrying table assembly is used for carrying a battery; the upper sealing head and the lower sealing head are respectively positioned on the upper side and the lower side of the carrying table assembly and are used for packaging a battery; the negative pressure adsorption mechanism comprises an adsorption chamber, the adsorption chamber is arranged on the side of the carrying table assembly, one end of the adsorption chamber communicates with the negative pressure generation device, a negative pressure adsorption opening is formed in the other end of the adsorption chamber, and the negative pressure adsorption opening faces the carrying table assembly. The battery secondary packaging device disclosed by the utility model can adsorb overflowed or splashed electrolyte and generated waste gas during secondary packaging, so that the electrolyte is prevented from polluting the sealing head, and the air quality of a workshop is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a battery secondary packaging device. Background Art

[0002] Soft-pack batteries have the advantages of light weight, large capacity, and good safety, and are being used more and more widely. During the packaging process of soft-pack batteries, it is necessary to punch holes on the aluminum-plastic film and place the battery cells in the punched holes. Then, the aluminum-plastic film with holes is folded in half to cover the battery cells. In order to prevent water vapor from entering the aluminum-plastic film, the aluminum-plastic film needs to be heat-sealed with a heated sealing head. Usually, packaging includes primary packaging and secondary packaging. The primary packaging is used to package the top and one side of the folded aluminum-plastic film (i.e., top sealing and side sealing), so that the aluminum-plastic film has only one side opening, and an air bag is left between the opening and the battery cell; then, the electrolyte is injected into the aluminum-plastic film from the opening and allowed to stand and form; finally, hot pressing packaging is performed from the side of the air bag close to the battery cell, i.e., secondary packaging, so that the battery cell is completely sealed in the aluminum-plastic film.

[0003] During / after secondary packaging, the temperature is greater than 180°, so a large amount of gas (hereinafter referred to as waste gas) will be generated, and some electrolyte will overflow. Since the battery has not been precisely cut, the electrolyte will overflow to the head, contaminating the head surface, making it difficult to disassemble and assemble the seal, and reducing its lifespan; the waste gas generated is relatively pungent, affecting the air quality of the workshop.

[0004] Therefore, there is an urgent need for a battery secondary packaging device to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a battery secondary packaging device, which can absorb electrolyte overflowed or splashed and waste gas generated during secondary packaging to avoid electrolyte contamination of the end cap and improve the air quality of the workshop.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A battery secondary packaging device, comprising:

[0008] A carrier assembly, used for carrying a battery;

[0009] The upper sealing head and the lower sealing head are respectively located on the upper side and the lower side of the carrier assembly and are used to package the battery;

[0010] The negative pressure adsorption mechanism comprises an adsorption chamber, which is arranged on the side of the carrier assembly and one end of which is connected to the negative pressure generating device. The other end of the adsorption chamber forms a negative pressure adsorption port, and the negative pressure adsorption port is arranged toward the carrier assembly.

[0011] As an alternative, the negative pressure adsorption port is disposed opposite to the battery placed on the stage assembly.

[0012] As an alternative, in the vertical direction, the negative pressure adsorption port is disposed at the battery outlet. As an alternative, in the horizontal plane, the extending path of the negative pressure adsorption port is configured as a "U" shape, and the negative pressure adsorption port can be opposite to three adjacent sides of the battery.

[0013] As an alternative, the adsorption chamber includes:

[0014] A transverse chamber, located on the side of the stage assembly and forming a first drainage channel extending in the horizontal direction, and the inlet of the first drainage channel is the negative pressure adsorption port;

[0015] A longitudinal chamber, connected to the transverse chamber, and a second drainage channel extending in the vertical direction is formed in the longitudinal chamber, and the second drainage channel is respectively communicated with the first drainage channel and the negative pressure generating device.

[0016] As an alternative, a guiding arc surface is provided at the connection between the lower side wall plate of the transverse chamber and the longitudinal chamber.

[0017] As an alternative, the negative pressure adsorption mechanism further includes a connecting pipe, one end of the connecting pipe is connected to the lower end of the longitudinal chamber and communicated with the second drainage channel, and the other end of the connecting pipe is communicated with the negative pressure generating device.

[0018] As an alternative, the bottom plate of the longitudinal chamber includes an inclined portion, and the connecting pipe is connected to the lowest point of the inclined portion.

[0019] As an alternative, the negative pressure adsorption mechanism includes at least two of the connecting pipes, and the at least two connecting pipes are arranged at intervals.

[0020] As an alternative, the negative pressure adsorption mechanism further includes a bracket and a connecting member, the bracket is disposed on one side of the stage assembly, and the connecting member connects the adsorption chamber and the bracket.

[0021] The beneficial effects of the present utility model are:

[0022] In the battery secondary packaging device of the utility model, the negative pressure adsorption port of the adsorption chamber is arranged toward the carrier assembly. When the upper and lower heads perform secondary packaging on the battery located on the carrier assembly, a negative pressure environment is formed at the negative pressure adsorption port under the action of the negative pressure generating device, thereby adsorbing the generated waste gas and overflowed electrolyte into the interior of the adsorption chamber, avoiding electrolyte contamination of the head, increasing the service life of the head and the convenience of replacement, avoiding the random diffusion of waste gas with pungent odor, and improving the air quality of the workshop. In addition, since the adsorption chamber is arranged on the side of the carrier, it will not interfere with the layout of the original battery secondary packaging device, reducing the design cost and modification cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a battery secondary packaging device provided in Embodiment 1 of the present utility model;

[0024] Figure 2 It is a structural schematic diagram of the negative pressure adsorption mechanism provided in the first embodiment of the utility model at a viewing angle;

[0025] Figure 3 It is a schematic structural diagram of the negative pressure adsorption mechanism provided in the first embodiment of the utility model from another perspective;

[0026] Figure 4 It is a top view of the battery secondary packaging device provided in the second embodiment of the utility model.

[0027] In the figure:

[0028] 10. stage assembly; 11. frame; 111. first frame; 12. supporting fixture; 13. interval;

[0029] 20. Upper head; 30. Lower head;

[0030] 40. Negative pressure adsorption mechanism; 41. Adsorption chamber; 411. Horizontal chamber; 412. Longitudinal chamber; 4121. Inclined portion; 413. Negative pressure adsorption port; 414. Flow guide arc surface; 42. Connecting pipe; 43. Bracket; 44. Connecting piece; 441. Mounting hole; 50. Battery; 51. Battery body; 52. Tab; 53. Airbag portion. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] Embodiment 1

[0036] This embodiment provides a battery secondary packaging device, which can perform secondary packaging on formed batteries. Figure 1As shown, the battery 50 to be repackaged includes a battery body 51, a tab 52 extending from the battery body 51, and an airbag portion 53 located on one side of the battery body 51. The position of the secondary packaging is the side of the airbag portion 53 close to the battery body. The battery secondary packaging device includes a carrier assembly 10, an upper head 20, a lower head 30 and a negative pressure adsorption mechanism 40. Among them, the carrier assembly 10 is arranged roughly horizontally, and the battery 50 can be placed on the upper side of the carrier assembly 10. Specifically, the carrier assembly 10 includes a frame 11 and a supporting fixture 12, the supporting fixture 12 is overlapped on the edge of the frame 11, and the concave and convex shape of the upper surface of the supporting fixture 12 matches the concave and convex conditions of the battery body 51 and the tab 52, so that the battery 50 can be supported flatly. A gap 13 is formed between one side of the supporting fixture 12 and the first frame 111 of the frame 11, and the airbag portion 53 is suspended on the gap 13 and overlapped on the first frame 111. The upper sealing head 20 is arranged on the upper side of the carrier assembly 10, and the lower sealing head 30 is arranged on the lower side of the carrier assembly 10. When the battery 50 is repackaged, the upper sealing head 20 moves downward, and the lower sealing head 30 moves upward and is clamped on the upper and lower sides of the airbag part 53 near the battery body 51, respectively, to achieve the secondary packaging of the battery 50. It should be noted that the structure and working principle of the upper sealing head 20 and the lower sealing head 30 themselves, and the driving structure of the upper sealing head 20 and the lower sealing head 30 are all existing mature components, which will not be repeated here.

[0037] like Figure 1 As shown, the negative pressure adsorption mechanism 40 includes an adsorption chamber 41, which is arranged on the side of the carrier assembly 10 and one end is connected to the negative pressure production device (not shown), and the other end of the adsorption chamber 41 forms a negative pressure adsorption port 413, which is arranged toward the carrier assembly 10. In the process of the upper head 20 and the lower head 30 performing secondary packaging on the battery 50, a negative pressure environment is formed at the negative pressure adsorption port 413 under the action of the negative pressure generating device, so that the waste gas and overflowed electrolyte generated during the packaging process are adsorbed into the adsorption chamber 41, so as to avoid the electrolyte contaminating the head, improve the service life of the head and the convenience of replacement, avoid the arbitrary diffusion of waste gas with pungent odor, and improve the air quality of the workshop. In addition, since the adsorption chamber 41 is arranged on the side of the carrier, it will not interfere with the layout of the original battery secondary packaging device, reducing the design cost and modification cost. It should be noted that the negative pressure generating device can be a vacuum pump, an exhaust fan, etc., which is not specifically limited here. In this embodiment, the inlet of the negative pressure generating device is connected to the adsorption chamber 41, and the outlet of the negative pressure generating device is connected to the waste gas and waste liquid vacuum tank. That is to say, the electrolyte and waste gas sucked into the adsorption chamber 41 are finally passed into the waste gas and waste liquid vacuum tank.

[0038] Alternatively, if Figure 1As shown, in this embodiment, a negative pressure adsorption port 413 is provided, and the negative pressure adsorption port 413 is higher than the carrier assembly 10 and opposite to the battery 50 placed on the carrier. Since the sources of the overflowed electrolyte and the generated exhaust gas are both at the battery 50, by setting the negative pressure adsorption port 413 to be opposite to the side of the battery 50, the negative pressure adsorption mechanism 40 can better adsorb the electrolyte and the generated exhaust gas, and directly prevent the electrolyte from adhering to the upper head 20 or the lower head 30. It should be noted that the length of the negative pressure adsorption port 413 is not less than the length of the battery 50 on the opposite side thereof. Thereby preventing part of the overflowed electrolyte or the generated exhaust gas from escaping and improving the adsorption effect.

[0039] In other embodiments, the negative pressure adsorption port 413 can be made larger. Specifically, in the vertical direction, the negative pressure adsorption port 413 is partially located above the stage assembly 10, partially flush with the stage assembly 10, and partially located below the stage assembly 10. In this solution, when the upper head 20 and the lower head 30 are pressed together with the battery 50, the adsorption area of ​​the negative pressure adsorption port 413 covers the side of the upper head 20, the side of the battery 50, and the side of the lower head 30, which can not only better prevent the generated exhaust gas from escaping and improve the effect of adsorbing exhaust gas, but also absorb the electrolyte that has adhered to the upper head 20 and the lower head 30, thereby better protecting the upper head 20 and the lower head 30.

[0040] like Figure 1 As shown, the negative pressure adsorption mechanism 40 also includes a bracket 43 and a connector 44, the bracket 43 is arranged on one side of the carrier assembly 10, and the connector 44 connects the adsorption chamber 41 and the bracket 43. By arranging the bracket 43 and the connector 44, it is convenient to support the adsorption chamber 41 at a suitable height, so as to better adsorb the overflowed electrolyte and the generated waste gas. In this embodiment, the bracket 43 is roughly a vertically arranged frame structure, which is light in weight and can reduce the amount of material used. The adsorption chamber 41 is at least partially located in the frame structure, which is conducive to the compactness of the entire battery secondary packaging device structure.

[0041] Optionally, the connector 44 can be connected to the adsorption chamber 41 by welding, which is reliable and does not require opening a hole in the wall of the adsorption chamber 41, thereby ensuring the sealing of the adsorption chamber 41. Figure 2 As shown, the connector 44 is provided with a mounting hole 441, and the fastener (not shown in the figure) is connected to the bracket 43 after passing through the mounting hole 441, so that the connector 44 and the adsorption chamber 41 are installed on the bracket 43, and the connection method is simple and easy to disassemble and assemble. In this embodiment, the bracket 43 is provided with an M8 threaded hole, and the adsorption chamber 41 can be installed by passing an M8 bolt through the mounting hole 441 on the connector 44 and threading it with the threaded hole. In other embodiments, the size specifications of the bolts, the number of mounting holes 441, etc. can be flexibly set as needed.

[0042] like Figure 2 As shown, the adsorption chamber 41 includes a transverse chamber 411 and a longitudinal chamber 412. Among them, the transverse chamber 411 is located on the side of the stage assembly 10 and forms a first drainage channel extending in the horizontal direction (the extension direction of the first drainage channel is the approximate flow direction of the fluid), and the entrance of the first drainage channel is a negative pressure adsorption port 413. Through the first drainage channel extending in the horizontal direction, the direction of the negative pressure generated at the adsorption entrance is roughly parallel to the horizontal direction, so that the electrolyte and exhaust gas at the battery 50 located on the side of the adsorption chamber 41 can be better adsorbed into the transverse chamber 411.

[0043] The longitudinal chamber 412 is connected to the transverse chamber 411, and a second drainage channel extending in the vertical direction is formed in the longitudinal chamber 412 (the extension direction of the second drainage channel is the approximate flow direction of the fluid), and the second drainage channel is respectively connected to the first drainage channel and the negative pressure generating device. By setting the second drainage channel to extend in the vertical direction, the electrolyte adhering to the inner wall of the adsorption chamber 41 can automatically flow down under the action of gravity, thereby preventing the electrolyte from adhering to the adsorption chamber 41 for a long time and causing corrosion of the adsorption chamber 41. In this embodiment, the adsorption chamber 41 can be made of a plate with a wall thickness of 2 mm. Preferably, the adsorption chamber 41 can be made of Teflon material, which is not only corrosion-resistant but also non-sticky, thereby preventing the electrolyte from hanging on the wall. Of course, in other embodiments, the adsorption chamber 41 can also be made of other corrosion-resistant materials, which are not specifically limited here.

[0044] In this embodiment, the transverse chamber 411 is roughly in the shape of a cuboid, and the longitudinal chamber 412 is also roughly in the shape of a cuboid. In other embodiments, the specific shapes of the transverse chamber 411 and the longitudinal chamber 412 can be flexibly adjusted and are not specifically limited here.

[0045] like Figure 3 As shown, a guide arc surface 414 is provided at the connection between the lower side wall plate of the transverse chamber 411 and the longitudinal chamber 412. The guide arc surface 414 enables the electrolyte entering the transverse chamber 411 to enter the longitudinal chamber 412 more smoothly, thereby preventing the electrolyte from being retained in the transverse chamber 411 or flowing out from the negative pressure adsorption port 413 in the reverse direction.

[0046] like Figure 3As shown, the negative pressure adsorption mechanism 40 further includes a connecting pipe 42. One end of the connecting pipe 42 is connected to the lower end of the longitudinal chamber 412 and communicates with the second drainage channel, and the other end of the connecting pipe 42 is connected to a negative pressure generating device. By providing the connecting pipe 42, it is convenient to connect the adsorption chamber 41 with the negative pressure generating device. Optionally, the connecting pipe 42 can be made of Teflon material, which is not only corrosion-resistant but also non-sticky, thus avoiding the electrolyte from sticking to the wall. Of course, in other embodiments, the connecting pipe 42 can also be made of other corrosion-resistant materials, which are not specifically limited herein. Optionally, the inner diameter of the connecting pipe 42 is 32 mm. In other embodiments, the inner diameter of the connecting pipe 42 can be flexibly selected.

[0047] In this embodiment, the negative pressure adsorption mechanism 40 includes at least two connecting pipes 42, and the at least two connecting pipes 42 are arranged at intervals of 13 along the length direction of the longitudinal chamber 412. By providing at least two connecting pipes 42, it is beneficial for the electrolyte in the longitudinal chamber 412 to be discharged more smoothly. In this embodiment, the negative pressure adsorption mechanism 40 is provided with two connecting pipes 42. In other embodiments, the number of connecting pipes 42 can be flexibly set.

[0048] Preferably, as Figure 3 shown, the bottom plate of the longitudinal chamber 412 includes an inclined portion 4121, and the connecting pipe 42 is connected to the lowest point of the inclined portion 4121. By forming the inclined portion 4121 on the bottom plate of the longitudinal chamber 412 and connecting the connecting pipe 42 to the lowest point of the inclined portion 4121, it is beneficial for all the electrolyte inhaled into the adsorption chamber 41 to be discharged through the connecting pipe 42, avoiding the long-term retention of the electrolyte in the adsorption chamber 41. In this embodiment, the inclined portion 4121 is an inclined plane, and there are two inclined portions 4121 provided on the longitudinal chamber 412, and the two inclined portions 4121 are located at both ends of the longitudinal chamber 412 along its length direction, and each connecting pipe 42 is correspondingly connected to the lowest points of the two inclined portions 4121. In other embodiments, the inclined portion 4121 can be a spherical surface, as long as it is ensured that the connecting pipe 42 is located at the lowest point of the inclined portion 4121.

[0049] Embodiment Two

[0050] This embodiment provides a battery secondary packaging device, which has the same general structure as the battery secondary packaging device in Embodiment One, except for the arrangement of the negative pressure adsorption port 413, which is specifically as follows:

[0051] As Figure 4 shown, in the horizontal plane, the extending path of the negative pressure adsorption port 413 is configured as a "U" shape, and the negative pressure adsorption port 413 can face three adjacent sides of the battery 50. Such an arrangement increases the coverage range of the negative pressure suction port and the tightness of the battery 50, thereby being able to better adsorb the overflowing electrolyte and also reducing the escape of waste gas, improving the improvement effect on the air quality in the workshop.

[0052] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the field, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scopes, and the content of this specification should not be understood as limiting the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A battery secondary packaging device, characterized in that: Comprising: A stage assembly (10) for carrying a battery (50); An upper head (20) and a lower head (30) respectively located on the upper and lower sides of the stage assembly (10) and used for encapsulating the battery (50); A negative pressure adsorption mechanism (40) including an adsorption chamber (41). The adsorption chamber (41) is arranged on the side of the stage assembly (10) and one end thereof is communicated with a negative pressure generating device. The other end of the adsorption chamber (41) forms a negative pressure adsorption port (413), and the negative pressure adsorption port (413) faces the stage assembly (10).

2. The battery secondary packaging device according to claim 1, characterized in that: The negative pressure adsorption port (413) is arranged opposite to the battery (50) placed on the stage assembly (10); or in the vertical direction, part of the negative pressure adsorption port (413) is located above the stage assembly (10), part is flush with the stage assembly (10), and part is located below the stage assembly (10).

3. The battery secondary packaging device according to claim 1, characterized in that: In the horizontal plane, the extending path of the negative pressure adsorption port (413) is configured as a "U" shape, and the negative pressure adsorption port (413) can be opposite to three adjacent sides of the battery (50).

4. The battery secondary packaging device according to any one of claims 1 to 3, characterized in that: The adsorption chamber (41) includes: A transverse chamber (411) located on the side of the stage assembly (10) and forming a first drainage channel extending in the horizontal direction. The inlet of the first drainage channel is the negative pressure adsorption port (413); A longitudinal chamber (412) connected to the transverse chamber (411). A second drainage channel extending in the vertical direction is formed in the longitudinal chamber (412), and the second drainage channel is respectively communicated with the first drainage channel and the negative pressure generating device.

5. The battery secondary packaging device according to claim 4, characterized in that: A diversion arc surface (414) is arranged at the connection part between the lower side wall plate of the transverse chamber (411) and the longitudinal chamber (412).

6. The battery secondary packaging device according to claim 4, characterized in that: The negative pressure adsorption mechanism (40) further includes a connecting pipe (42). One end of the connecting pipe (42) is connected to the lower end of the longitudinal chamber (412) and communicated with the second drainage channel, and the other end of the connecting pipe (42) is communicated with the negative pressure generating device.

7. The battery secondary packaging device according to claim 6, characterized in that: The bottom plate of the longitudinal chamber (412) includes an inclined part (4121), and the connecting pipe (42) is connected to the lowest point of the inclined part (4121).

8. The battery secondary packaging device according to claim 6, characterized in that: The negative pressure adsorption mechanism (40) includes at least two connecting pipes (42), and the at least two connecting pipes (42) are arranged at intervals.

9. The battery secondary packaging device according to any one of claims 1 to 3, characterized in that: The negative pressure adsorption mechanism (40) further includes a bracket (43) and a connecting piece (44). The bracket (43) is arranged on one side of the stage assembly (10), and the connecting piece (44) connects the adsorption chamber (41) and the bracket (43).

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