CN214957094U

CN214957094U - Vertical final sealing equipment for soft-packaged power battery cell

Info

Publication number: CN214957094U
Application number: CN202121515192.1U
Authority: CN
Inventors: 王卫星; 张方方
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-11-30
Anticipated expiration: 2031-07-05

Abstract

The utility model provides a vertical final sealing device for a soft-packaged power cell, which belongs to the field of lithium ion batteries and comprises a support frame; the two ends of the upper end of the support frame are symmetrically provided with end sockets, the two end sockets move horizontally and relatively and are respectively contacted with the cell air bag and seal the cell air bag, and the cell air bag is vertically arranged; the tray is used for positioning the battery cell main body; and the lifting mechanism is arranged at the lower end of the support frame, lifts the tray to reciprocate up and down, and upwards conveys the battery cell air bag to two parts between the end sockets. The utility model discloses electric core need not overturn, and in the gas bag can not flow back to the electrolyte in the electric core main part, the encapsulation face does not have the electrolyte in the plastic-aluminum membrane, can guarantee that the encapsulation effect is better when final banding, can not produce false phenomenon of sealing, has improved electric core packaging quality.

Description

Vertical final sealing equipment for soft-packaged power battery cell

Technical Field

The utility model belongs to the lithium ion battery field relates to new energy automobile's lithium ion battery, especially relates to the vertical equipment that seals eventually of soft packet of power electricity core.

Background

The lithium ion battery needs to be formed in the production process, and the formation is a process of activating the lithium ion battery through a certain charging and discharging system. Lithium ion batteries produce a large amount of gases during formation, which gases need to be vented from the interior of the battery. The battery needs to be subjected to final edge sealing and air bag cutting after degassing. The quality of the edge sealing of the aluminum plastic film of the battery cell directly influences the service life of the battery cell.

At present, the degassing mode of the lithium ion soft package battery is vertical degassing, and the purpose is to reduce the loss of electrolyte, so that the electrolyte pollutes the battery core main body. At present, the final edge sealing modes of the batteries in the industry are flat edge sealing, the batteries are converted from vertical to flat mode, electrolyte in a battery core main body flows into a battery core air bag, more electrolyte exists in the middle of two layers of aluminum plastic films during flat final edge sealing, the packaging of the aluminum plastic films in an electrolyte filling state can seriously affect the packaging quality, the phenomenon of poor sealing effect can also be caused, the tensile force of the aluminum plastic films is poor, the false sealing phenomenon occurs for a serious person, and the phenomena of cracking of the sealing mark and the like occur.

The battery has the risk of liquid leakage when the battery is used for a long time, and the safety performance of the battery is seriously influenced due to ignition. Meanwhile, the battery is turned from vertical to horizontal, and the electrolyte flows back into the small air bag, so that the amount of the electrolyte is increased, the circulation performance of the battery core is deteriorated, the consistency of the liquid retention amount of the battery is reduced, and a certain amount of the electrolyte is wasted. In the flat packaging process, the electrolyte flows back into the air bag, so that the packaging temperature and the packaging time need to be correspondingly improved, and the packaging pressure is used for adjusting the packaging thickness of the aluminum-plastic film so as to improve the packaging quality. However, the packaging conditions of the packaging temperature, the packaging time and the packaging pressure cannot completely solve the problem that the battery has the risk of liquid leakage when the battery is used for a long time, and the safety performance of the battery is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved problem of the utility model is to provide the vertical equipment that seals eventually of soft-packaged power electric core, electric core need not overturn, and in the gas bag can not flow back to the electrolyte in the electric core main part, the encapsulation face does not have the electrolyte in the plastic-aluminum membrane, can guarantee when final banding that the encapsulation effect is better, can not produce the false phenomenon of sealing, has improved electric core packaging quality.

In order to solve the technical problem, the utility model discloses a technical scheme is: the equipment for vertically and finally sealing the soft-packaged power battery cell comprises a support frame;

the two ends of the upper end of the support frame are symmetrically provided with end sockets, the two end sockets move horizontally and relatively and are respectively contacted with the cell air bag and seal the cell air bag, and the cell air bag is vertically arranged;

the tray is used for positioning the battery cell main body;

and the lifting mechanism is arranged at the lower end of the support frame, lifts the tray to reciprocate up and down, and upwards conveys the battery cell air bag to two parts between the end sockets.

Furthermore, the lifting mechanism is of a cylinder, an oil cylinder, an electric push rod or a motor screw rod structure.

Further, the tray includes the bottom plate, the upper end of bottom plate is equipped with a plurality of support bars perpendicularly, the space that the support bar formed to make electric core vertical setting, and keep fixed.

Further, the lower extreme of tray is equipped with the track board, be equipped with the guide rail of guaranteeing the relative support frame of tray and moving precision between tray and the track board, the tray is established in the upper end of guide rail, and the two is not fixed, and the tray has two positions A and B on the track board, and the A position is used for the material loading and/or the unloading of electric core, and the B position corresponds upwards lifting position, up to the C position.

Furthermore, the upper end of the sliding block of the guide rail is provided with a plurality of positioning columns extending upwards, the tray is guided and positioned, and the sliding block of the guide rail is not connected with the tray, so that the tray is lifted upwards and separated from the sliding block of the guide rail and then ascends.

Furthermore, be equipped with the first inductive switch that responds to the tray to A position on the track board, still be equipped with the second inductive switch that responds to the tray to B position, be equipped with the third inductive switch that the tray arrived C position on the support frame.

Furthermore, the structures of the two sides of the seal head are the same, the seal head on one side is fixedly locked on a seal head seat, the seal head seat is fixedly arranged on a base, and the base is driven by an air cylinder to reciprocate relative to a support frame so as to drive the seal head to move relatively.

Further, the cylinder is locked on the connecting plate fixedly, the connecting plate is fixedly arranged on the supporting frame, the cylinder is connected with the base through a floating structure of the T-shaped groove structure, and guide rails for guaranteeing the motion precision of the base are arranged between the two sides of the base and the connecting plate.

Furthermore, the head sets up relatively in groups, and it sets up to the multiunit on the support frame in parallel, and every group head corresponds a elevating system.

Compared with the prior art, the utility model has the advantages and positive effect as follows.

The utility model discloses an electricity core carries out vertical encapsulation, and in electrolyte can not place the small gas bag that flows backwards and get into electric core because of electric core level, no electrolyte or electrolyte were less in the plastic-aluminum membrane during the encapsulation, consequently the encapsulation quality is better, breaks through the horizontal encapsulation of traditional thinking, if electric core processing procedure in-process, the electrolyte infiltration is insufficient, and it is more to float the liquid, and a large amount of electrolyte flow in the small gas bag after electric core is set level, and at this moment vertical packaging method embodies more obviously to the encapsulation quality of plastic-aluminum membrane.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a front view of the device for vertically terminating the soft-packaged power cell of the present invention;

fig. 2 is a top view of the device for vertically sealing the soft-packaged power cell of the present invention;

fig. 3 is a side view of the apparatus for vertically terminating the soft-packaged power cell of the present invention;

fig. 4 is a schematic structural diagram after the battery cell is exhausted and packaged by the utility model;

fig. 5 is a schematic structural diagram after the battery cell exhaust end sealing of the present invention is adopted.

Reference numerals:

11. a support frame; 12. a tray; 13. an electric core; 14. a supporting strip; 15. a movable plate; 16. a lifting mechanism; 18. adjusting screws; 21. a cylinder; 22. a connecting plate; 23. a floating joint; 24. a guide rail; 25. a base; 26. mounting a plate; 27. a sealing head seat; 28. and (5) sealing the head.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1-3, the device for vertically sealing a soft-packaged power cell includes a support frame 11;

the end sockets 28 are symmetrically arranged on two sides of the upper end of the support frame 11, the two end sockets 28 move horizontally and relatively, and are respectively contacted with the electric core air bag and seal the electric core air bag, the electric core air bag is vertically arranged, the length of the end sockets 28 is greater than the length of the electric core 13 to be packaged, the quality of final sealing can be ensured under the condition that the front position and the rear position of the electric core 13 are deviated, thus, only the positioning precision of the electric core 13 in the left and right directions needs to be ensured, the precision requirement of equipment is greatly reduced, the production, manufacturing and assembling cost of the equipment is reduced, the quality is ensured on the premise that the final sealing effect is met, and the working efficiency is improved;

the tray 12 is used for positioning the battery cell air bag in the left and right directions and realizing the bearing transfer of the battery cell 13;

and the lifting mechanism 16 is arranged at the lower end of the support frame 11, lifts the tray 12 to reciprocate up and down, and upwardly conveys the cell air bag between the two end sockets 28.

Preferably, the lifting mechanism 16 is a cylinder 21, an oil cylinder, an electric push rod or a motor screw structure, other equivalent structures capable of lifting are all available, as long as stable lifting can be achieved, during actual lifting, the left and right positions of the tray 12 need to be accurately positioned, the thickness of the battery cell 13 moves upwards, the battery cell 13 corresponds to the packaging position of the end enclosure 28, and after accurate positioning, balanced left and right stress is facilitated in the packaging process, the battery cell 13 is stable and not inclined, and the packaging effect is better; the tray 12 setting is stretched out to the front and back position of electric core 13, and the part of stretching out is convenient to correspond with elevation structure, for example: the lifting structure is a cylinder 21, the output shaft of the cylinder 21 is arranged upwards, the output shaft of the cylinder 21 is provided with a lifting plate, after the tray 12 is in place, the lifting plate lifts the tray 12 to move upwards, and in the actual working process, a guide rail 24 or other equivalent mechanisms for ensuring the lifting precision of the lifting plate can be arranged between lifting frames of the lifting plate.

Preferably, tray 12 includes the bottom plate, the upper end of bottom plate is equipped with a plurality of support bars 14 perpendicularly, the space that support bars 14 formed, so that electric core 13 is vertical to be set up, and keep fixed, moreover, the steam generator is simple in structure, mechanical type is fixed, can artifically carry out electric core 13's specialty, also can dispose the manipulator and carry out electric core 13's transportation, select and set for according to actual conditions, if the form that adopts automatic assembly line, that adopts manipulator cooperation AGV to get off and carry out electric core 13's transportation, the operation rule of AGV dolly is set for according to the automation line orbit that sets up, promote automatic degree.

Preferably, a track plate is arranged at the lower end of the tray 12, a guide rail 24 for ensuring the moving precision of the tray 12 relative to the support frame 11 is arranged between the tray 12 and the track plate, the tray 12 is arranged at the upper end of the guide rail 24, the tray 12 and the guide rail are not fixed, the tray 12 is provided with a position A and a position B on the track plate, the position A is used for feeding and/or discharging the battery cell 13, the position B corresponds to an upward lifting position until the position C, and the transferring precision of the battery cell 13 is ensured; more preferably, the upper end of the sliding block of the guide rail 24 is provided with a plurality of positioning columns extending upwards, the plurality of positioning columns form a groove shape with an upward opening of a fence structure, the position of the tray 12 is guided and positioned, and the sliding block of the guide rail 24 is not connected with the tray 12, so that the tray 12 is lifted upwards after being separated from the sliding block of the guide rail 24.

Preferably, be equipped with the first inductive switch of response tray 12 to the A position on the track board, still be equipped with the second inductive switch of response tray 12 to the B position, be equipped with the third inductive switch of tray 12 to the C position on the support frame 11, inductive switch can be proximity switch, also can be touch contact switch, perhaps infrared inductive switch, the precision of tray 12 is ensured to the position of response tray 12, is favorable to promoting the quality of sealing.

Preferably, the structures of the two sides of the seal head 28 are the same, so that uniform manufacturing is facilitated, the cost is reduced, the structures are the same, and the synchronism of actions is conveniently ensured, wherein the seal head 28 on one side is fixedly locked on the seal head 28 seat 27, the seal head 28 seat 27 is fixedly arranged on the base 25, the base 25 is driven by the cylinder 21 to reciprocate relative to the support frame 11, so that the seal head 28 is driven to move relatively, the mode of driving the cylinder 21 is adopted, the structure is simple, and in the structure, the cylinder 21 can be replaced by an oil cylinder or an electric push rod.

Preferably, the cylinder 21 is fixedly locked on the connecting plate 22, the connecting plate 22 is fixedly arranged on the support frame 11, the cylinder 21 is connected with the base 25 through a floating structure of a T-shaped groove structure, the T-shaped groove structure is convenient and quick to fix and disassemble, the assembling efficiency is improved, and a guide rail 24 for ensuring the movement precision of the base 25 is arranged between the two sides of the base 25 and the connecting plate 22, so that the precision is improved.

Preferably, the end enclosures 28 are arranged in groups, a plurality of groups of end enclosures are arranged on the support frame 11 in parallel, each group of end enclosures 28 corresponds to one lifting mechanism 16, so that an automatic assembly line structure is formed, a plurality of battery cells 13 can be sealed at the same time, and the working efficiency is improved; more preferably, the upper end of the support frame 11 is provided with a movable plate 15, the movable plate 15 is arranged inside the upper end of the support frame and is used for bearing the seal heads 28 and related parts, the two sides of the lower end of the movable plate 15 are provided with adjusting screws 18, the adjusting screws 18 are in threaded connection with the support frame 11, the movable plate 15 can integrally move up and down after being adjusted upwards, the levelness of the two seal heads 28 can be conveniently adjusted, the upper and lower positions of the seal heads 28 can be adjusted, and processing and assembling errors are made up.

The vertical final sealing method for the soft-packaged power cell 13 comprises the following steps:

s1, the battery cell 13 is circulated in a vertical state, the battery cell 13 is subjected to exhaust packaging, the exhaust packaging is 30mm away from the main body of the battery cell 13, and as shown in fig. 4, the battery cell is directly placed in a tray 12 of equipment for vertically and finally sealing the soft package power battery cell 13 by using a manipulator or a manual mode after the exhaust packaging;

s2, moving and lifting the battery cell 13, positioning the left and right positions of the battery cell 13, translating the tray 12 from the position A to the position B through the translation mechanism after positioning, and then lifting the tray from the position B to the position C under the action of the lifting structure;

s3, sealing the battery cell 13, when the battery cell 13 reaches the position C, the sealing heads 28 on the left side and the right side work simultaneously, push to the middle to be respectively contacted with the air bag of the battery cell, and maintain the pressure for 3-5S to form a final sealing, a sealing with the width of 8mm is formed at the position 2mm beside the main body of the battery cell 13, the thickness of the final sealing is 260um +/-15 um, as shown in figure 5, the vertical final sealing method is firstly applied in the field of battery packaging, the traditional packaging method is broken through, and the packaging quality of the aluminum plastic film is greatly improved.

In the process of actual work, if electric core 13 processing procedure in-process, the electrolyte infiltration is not abundant, and the inside floating liquid of electric core 13 is more, and when the level was placed, electrolyte can flow into in the gas bag, seriously influences aluminium-plastic film encapsulation quality, uses vertical packaging method, and electrolyte can not be because of electric core 13 level is placed the refluence and is got into in the electric core gas bag, does not have electrolyte in the aluminium-plastic film during the encapsulation, consequently encapsulates of high qualityly.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. Vertical equipment of sealing eventually of soft packet of power electric core, its characterized in that: comprises a supporting frame;

the tray is used for positioning the battery cell main body;

2. The equipment for vertically sealing soft-packaged power cells according to claim 1, characterized in that: the lifting mechanism is of a cylinder, an oil cylinder, an electric push rod or a motor lead screw structure.

3. The equipment for vertically sealing soft-packaged power cells according to claim 1, characterized in that: the tray includes the bottom plate, the upper end of bottom plate is equipped with a plurality of support bars perpendicularly, the space that the support bar formed to make the vertical setting of electric core, and keep fixed.

4. The equipment for vertically sealing soft-packaged power cells according to claim 1, characterized in that: the lower extreme of tray is equipped with the track board, be equipped with the guide rail of guaranteeing the relative support frame of tray and remove the precision between tray and the track board, the tray is established in the upper end of guide rail, and the two is not fixed, and the tray has two positions A and B on the track board, and the A position is used for the material loading and/or the unloading of electric core, and the B position corresponds upwards to lift the position, up to the C position.

5. The equipment for vertically sealing the soft-packaged power cell according to claim 4, wherein: the slider upper end of guide rail is equipped with a plurality of reference columns that upwards extend, and is right the position of tray leads and fixes a position, and the slider and the tray of guide rail are not connected to make the tray upwards when being lifted, rise after breaking away from with the slider of guide rail.

6. The equipment for vertically sealing the soft-packaged power cell according to claim 4, wherein: the track plate is provided with a first inductive switch for inducing the tray to reach the A position, a second inductive switch for inducing the tray to reach the B position, and a third inductive switch for inducing the tray to reach the C position is arranged on the support frame.

7. The equipment for vertically sealing the soft-packaged power cell according to any one of claims 1 to 6, wherein: the structure of the two sides of the seal head is the same, the seal head on one side is fixedly locked on the seal head seat, the seal head seat is fixedly arranged on the base, and the base is driven by the cylinder to reciprocate relative to the support frame so as to drive the seal head to move relatively.

8. The equipment for vertically sealing a soft-packaged power cell according to claim 7, characterized in that: the cylinder is fixedly locked on the connecting plate, the connecting plate is fixedly arranged on the supporting frame, the cylinder is connected with the base through a floating structure of the T-shaped groove structure, and guide rails for guaranteeing the motion precision of the base are arranged between the two sides of the base and the connecting plate.

9. The equipment for vertically sealing the soft-packaged power cell according to any one of claims 1 to 6, wherein: the seal heads are arranged in groups relatively, the seal heads are arranged in a plurality of groups on the support frame in parallel, and each group of seal heads corresponds to one lifting mechanism.