Splash-proof and easy-to-absorb battery liquid injection production line

Abstract

The utility model discloses a splash-proof easy-to-absorb battery liquid injection production line which comprises a rack and a conveying device arranged on the rack, a plurality of conveying plates are arranged on the conveying device, and a plurality of clamps used for fixing battery packs are arranged on the conveying plates. A feeding station, a first liquid injection device, a first vacuum defoaming device, a second vacuum defoaming device, a second liquid injection device, a third vacuum defoaming device, a sealing device and a discharging device are sequentially arranged along the conveying device. The first liquid injection device and the second liquid injection device are each internally provided with a plurality of liquid injection needles, liquid can be sprayed out towards the inner side wall of the battery pack through the special structures of the liquid injection needles, finally makes contact with the inner side wall of the battery pack and flows downwards along the side wall position, in this way, the liquid can flow more gently, and the effect that bubbles are reduced from the source is achieved; besides, the liquid sprayed out along the arc-shaped track is in contact with the side wall of the battery pack in sequence, so that the force for spraying out the liquid is prevented from being concentrated at one point, the impact of the liquid on the side wall of the battery pack is greatly reduced, and the condition of liquid splashing is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery production equipment, in particular to a splash-proof and easily absorbed battery liquid injection production line. Background Art

[0002] Batteries are an important source of energy for mobile devices. During their production, chemical liquids need to be injected into the battery pack. Obviously, these parts cannot be done manually. Therefore, a device for injecting liquid into the battery has emerged in the industry. During the injection process, bubbles will be mixed into the battery, which will affect the efficiency of the battery. Part of the reason for the bubbles is related to the design of the injection needle. The injection needle is currently a straight-cylinder design, such as the public technical document "CN118315780A, a lithium battery liquid injection device", refer to the attached document. Figure 1-3 It can be seen that the injection head is set as a straight cylinder and the liquid is ejected vertically; the impact force generated by the vertical downward injection of the liquid is large, which makes it easy to mix in more gas and produce bubbles. For this reason, a bubble removal device is provided in the production process, but these bubble removal devices cannot guarantee that the bubbles can be removed. For this reason, this application proposes a solution to reduce the generation of bubbles from the source. Utility Model Content

[0003] The purpose of the utility model is to provide a splash-proof and easy-to-absorb battery liquid filling production line to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A splash-proof and easily absorbent battery filling production line includes a frame and a conveying device arranged on the frame, the conveying device is provided with a plurality of conveying plates, the conveying plates are provided with a plurality of clamps for fixing battery packs, and a loading station, a first filling device, a first vacuum defoaming device, a second vacuum defoaming device, a second filling device, a third vacuum defoaming device, a sealing device, and a unloading device are sequentially arranged along the conveying device;

[0006] The first and second liquid injection devices are both provided with a plurality of liquid injection needles, the liquid injection needles comprising a needle body, a flow channel 1 being provided in the needle body, at least two through holes communicating with the flow channel 1 being provided on the side of the lower end of the needle body, the through holes being connected to a liquid injection part, a flow channel 2 being provided in the liquid injection part, and a liquid injection port being formed at the end of the liquid injection part.

[0007] According to a further technical solution, the liquid injection portion and the needle body are integrally formed, and the second flow channel is straight and inclined downward.

[0008] According to a further technical solution, the liquid injection portion is in the shape of an elongated strip, the angle between the liquid injection portion and the needle body is 100°-120°, and the second flow channel extends obliquely along the direction of the liquid injection portion.

[0009] According to a further technical solution, the liquid injection port is flush with the lower end of the needle body, and the angle between the extension line of the second flow channel and the plane of the liquid injection port is 20°-30°.

[0010] According to a further technical solution, openings for the battery pack to enter are provided below the first liquid injection device, the first vacuum debubbling device and the third vacuum debubbling device, and are respectively combined with the conveying plates to form vacuum chambers.

[0011] A further technical solution is that the unloading device includes a moving component, a fixed beam is installed at the output end of the moving component, and the two side surfaces of the fixed beam are slidingly connected with movable beam 1 and movable beam 2 respectively, and clamping arm 1 and clamping arm 2 are staggered below the movable beam 1 and movable beam 2 respectively, and cylinder 1 and cylinder 2 are installed on the fixed beam, which are respectively connected to movable beam 1 and movable beam 2.

[0012] A further technical solution is that the second liquid injection device includes a fixed frame 1, a lifting frame is installed on the fixed frame 1, a lifting component 2 is installed between the fixed frame 1 and the lifting frame, a plurality of vacuum adsorption stations and a lifting component 1 are installed on the lifting frame, the lifting component 1 is connected to the liquid injection component, and a plurality of liquid injection needles are provided on the liquid injection component, the liquid injection needles correspond to the vacuum adsorption stations, and the vacuum adsorption stations are used to open the battery pack.

[0013] A further technical solution is that a lifter is installed at the bottom of the lifting frame, a movable frame is installed at the output end of the lifter, the movable frame is provided with a V-shaped movable groove, a movable rod is movably connected in the movable groove, and the two movable rods are respectively connected to a first clamping plate and a second clamping plate, and the first clamping plate and the second clamping plate are respectively connected to the bottom of the lifting frame through a sliding pair;

[0014] A plurality of mounting parts 1 and 2 are respectively provided at the bottom of the first and second clamping plates. The first and second mounting parts are arranged relative to each other in a staggered manner, and vacuum suction cups are respectively provided on the opposite sides.

[0015] According to a further technical solution, the conveying device is arranged in a ring shape, the first liquid injection device and the edge sealing device share a fixed frame one, the first vacuum debubbling device and the third vacuum debubbling device share a fixed frame two, and the second vacuum debubbling device and the second liquid injection device share a fixed frame three.

[0016] Beneficial effects of the utility model:

[0017] The special structure of the injection needle in this utility model allows the liquid to be sprayed toward the inner wall of the battery pack, and eventually contact the inner wall of the battery pack and flow downward along the side wall. This makes the liquid flow more gentle, eliminates the impact caused by the liquid directly reaching the bottom of the battery pack, and eliminates the situation where the liquid interacts with the subsequent liquid and mixes with the gas to generate bubbles, thereby achieving the effect of reducing the generation of bubbles at the source;

[0018] In addition, the liquid is sprayed in the same direction, and the liquid near the inner side flows out of the liquid filling port before the liquid near the outer side, so the liquid is finally sprayed out in an arc-shaped trajectory. The liquid sprayed along the arc-shaped trajectory also contacts the side wall of the battery pack in a certain order, avoiding the force of the liquid spraying to be concentrated at one point, thereby greatly reducing the impact of the liquid on the side wall of the battery pack and avoiding liquid splashing.

[0019] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 : The overall three-dimensional structure of the utility model Figure 1 .

[0021] Figure 2 : The overall three-dimensional structure of the utility model Figure 2 .

[0022] Figure 3 : Combination diagram of the second liquid injection device and the second vacuum degassing device of the present invention.

[0023] Figure 4 : The second liquid injection device structure diagram of the present utility model.

[0024] Figure 5 : The cross section of the injection needle of the utility model Figure 1 .

[0025] Figure 6 : The cross section of the injection needle of the utility model Figure 2 .

[0026] Figure 7 : Vacuum adsorption station structure diagram of the present utility model.

[0027] Figure 8 : The structural diagram of the blanking device of the present utility model.

[0028] Figure 9 : Combination diagram of the first vacuum degassing device and the third vacuum degassing device of the present invention.

[0029] Figure numerals: 11-frame, 12-conveyor, 13-conveyor plate, 14-clamp, 15-loading station, 2-first liquid injection device, 31-first vacuum defoaming device, 32-second vacuum defoaming device, 33-third vacuum defoaming device, 34-box, 35-lifting component three, 36-vacuum device, 4-second liquid injection device, 41-fixed frame one, 42-lifting frame, 43-lifting component two, 44-vacuum adsorption station, 441-lifter, 4421-movable frame, 4422-movable groove, 4423-movable rod, 4431-splint one, 4 432-clamping plate 2, 4433-mounting part 1, 4434-mounting part 2, 4435-vacuum suction cup, 444-sliding pair, 45-lifting component 1, 46-liquid injection component, 47-liquid injection needle, 471-needle body, 472-flow channel 1, 473-liquid injection part, 474-flow channel 2, 475-liquid injection port, 5-sealing device, 6-unloading device, 61-moving component, 62-fixed beam, 63-movable beam 1, 64-movable beam 2, 65-clamping arm 1, 66-clamping arm 2, 67-cylinder 1, 68-cylinder 2, 71-fixed frame 2, 72-fixed frame 3. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Please refer to Figure 1-9 ;

[0032] The battery filling production line described in this utility model aims to change the way of filling the battery pack and reduce the generation of bubbles from the source. First, the various devices of the production are introduced. Figure 1 and Figure 2 , specifically including a frame 11 and a conveying device 12 provided on the frame 11, wherein the conveying device 12 can be linear or annular, which is not limited here, and a plurality of conveying plates 13 are provided on the conveying device 12, and a plurality of clamps 14 for fixing the battery pack are provided on the conveying plates 13. Along the conveying device 12, a loading station 15, a first liquid injection device 2, a first vacuum debubbling device 31, a second vacuum debubbling device 32, a second liquid injection device 4, a third vacuum debubbling device 33, a sealing device 5 and a unloading device 6 are sequentially provided;

[0033] In the initial state, the battery pack is empty, so manual loading can be used. Of course, automatic loading can also be performed by a robot. During operation, several empty battery packs are placed on the fixture 14 for fixation, and then the conveying device 12 drives the conveying plate 13 to pass through the above-mentioned devices in sequence. First, these battery packs will pass through the first liquid injection device 2 for partial liquid injection. Figure 3 and Figure 6The first liquid injection device 2 is provided with a plurality of liquid injection needles 47. When injecting liquid, the liquid injection needles 47 will extend into the interior of the battery pack. In this embodiment, the liquid injection needle 47 includes a needle body 471, and a flow channel 1 472 is provided in the needle body 471. At least two through holes connected to the flow channel 1 472 are provided on the side of the lower end of the needle body 471. The through holes are connected to the liquid injection part 473, and the flow channel 2 474 is provided in the liquid injection part 473. A liquid injection port 475 is formed at the end of the liquid injection part 473. The liquid injection part 473 is inclined toward the inner wall of the battery pack.

[0034] Such a design allows the liquid to spray toward the inner wall of the battery pack, and eventually contact the inner wall of the battery pack and flow downward along the side wall. This can make the liquid flow smoother, eliminate the impact caused by the liquid directly reaching the bottom of the battery pack, and interact with the subsequent liquid to mix with the gas to produce bubbles, thereby achieving the effect of reducing the generation of bubbles from the source. Of course, the use of a special injection needle 47 structure can only reduce the generation of bubbles, and cannot remove all bubbles.

[0035] The traditional straight-cylinder liquid injection is also prone to causing liquid to splash out of the battery pack. Preferably, the second flow channel 474 is straight and inclined downward, and the liquid injection port 475 is vertically downward. During liquid injection, the liquid is sprayed in the same direction, and the liquid near the inner position flows out of the liquid injection port 475 before the liquid near the outer side, so that the liquid is finally sprayed out in an arc-shaped trajectory. The liquid sprayed along the arc trajectory also contacts the side wall of the battery pack in a certain order, avoiding the force of the liquid spraying being concentrated at one point, thereby greatly reducing the impact of the liquid on the side wall of the battery pack and avoiding liquid splashing.

[0036] After the first liquid injection, the conveying device 12 drives the battery pack into the first vacuum debubbling device 31 and the second vacuum debubbling device 32. Since the amount of liquid injected for the first time is relatively large, more bubbles will be generated. Therefore, after the first liquid injection, the first vacuum debubbling device 31 and the second vacuum debubbling device 32 are used to remove bubbles in sections, which can achieve a better effect of removing bubbles.

[0037] Then it enters the second liquid injection device 4, which is also equipped with the same liquid injection needle 47 as the first liquid injection device 2. Specifically, the above-mentioned embodiment can be produced, and the generation of bubbles during the liquid injection process can also be reduced. After the second liquid injection, it enters the third vacuum debubbling device 33 for the third debubbling operation. Based on the special design of the liquid injection needle 47, the bubbles generated are relatively few. After the third debubbling operation, the bubbles in the liquid can be basically completely removed, which provides a guarantee for the normal operation efficiency of the battery. Finally, the edge sealing device is used to seal the opening of the battery pack, and the finished product is taken out using a blanking container.

[0038] In the embodiment of the present invention, the liquid injection portion 473 is in the shape of an elongated strip, and the angle a between the liquid injection portion 473 and the needle body 471 is 100°-120°, so that the liquid injection portion 473 can extend laterally as close to the inner wall of the workpiece as possible, so that the liquid injection needle 47 does not need to penetrate too deep into the interior of the workpiece, and the flow channel 2 474 extends obliquely along the direction of the liquid injection portion 473. In addition, the liquid injection port 475 is flush with the lower end of the needle body 471, and the angle b between the extension line of the flow channel 2 474 and the plane of the liquid injection port 475 is 20°-30°.

[0039] The structures of the first liquid injection device 2, the first vacuum debubbling device 31 and the third vacuum debubbling device 33 in the present invention are the same. Figure 9 , including a box body 34, which is connected to the lifting assembly 35 and the vacuum device 36. An opening is provided at the bottom of the box body 34. In the initial state, the box body 34 is located at the top. After the conveying plate 13 reaches the bottom, the lifting assembly is used to move the box body 34 downward, and several battery packs enter the inner cavity of the box body 34. At the same time, the edge of the box body 34 contacts the surface of the conveying plate 13, thereby forming a chamber. Then, the vacuum device 36 is started to remove the gas in the chamber to form a vacuum in the chamber, and the air bubbles in the liquid are extracted after standing for a period of time.

[0040] In addition, the electrolyte can be more easily absorbed by injecting the electrolyte twice and removing bubbles and standing the electrolyte three times.

[0041] One embodiment of the present invention regarding the blanking device 6 is shown in FIG. Figure 8 , specifically the moving component 61, the output end of the moving component 61 is installed with a fixed beam 62. The traditional method of unloading materials usually uses a clamp to obtain materials, but it requires the use of multiple air claws as power, the cost is very high and there are many air pipes distributed. This embodiment adopts a method of slidingly connecting movable beam 1 63 and movable beam 2 64 on both sides of the fixed beam 62. The movable beam 1 63 is provided with a clamp arm 1 65, and the movable beam 2 64 is provided with a clamp arm 2 66. The clamping action of clamp arm 1 65 and clamp arm 2 66 is achieved by moving the movable beam 1 63 and the movable beam 2 64 relative to each other. More specifically, a cylinder 1 67 and a cylinder 2 68 are installed on the fixed beam 62, which are connected to the movable beam 1 63 and the movable beam 2 64 respectively.

[0042] The first liquid injection device 2 and the second liquid injection device 4 in the utility model have the same structure. Figure 4 and Figure 7 , the following will be described by taking the second liquid injection device 4 as an example;

[0043] Specifically, it includes a fixing frame 41, a lifting frame 42 is installed on the fixing frame 41, a lifting component 2 43 is installed between the fixing frame 41 and the lifting frame 42, a plurality of vacuum adsorption stations 44 and a lifting component 1 45 are installed on the lifting frame 42, the lifting component 1 45 is connected to the injection component 46, and the injection component 46 is provided with a plurality of injection needles 47, and the injection needles 47 correspond to the vacuum adsorption stations 44; before injection, the opening of the battery pack is relatively small or tightly attached, so that the injection needle 47 cannot be inserted into the interior, so it is necessary to expand the opening of the battery pack, specifically, by adsorbing both sides of the battery pack through the vacuum adsorption station 44, and then moving in both directions to move the two sides of the battery pack away from each other to expand the opening, and then the injection component 46 is driven downward by the lifting component 1 45 to make the injection needle 47 extend from the opening of the battery pack into the interior.

[0044] Regarding the specific implementation of the vacuum adsorption station 44, specifically, a lifter 441 is installed at the bottom of the lifting frame 42, and a movable frame 4421 is installed at the output end of the lifter 441. The movable frame 4421 is provided with a "V"-shaped movable groove 4422, and a movable rod 4423 is movably connected in the movable groove 4422. Preferably, a sliding member such as a roller or a bearing is provided in the movable groove 4422, and the movable rod 4423 is connected to the sliding member. The two movable rods 4423 are respectively connected to a clamping plate 1 4431 and a clamping plate 2 4432. The clamping plate 1 44 31 and the second clamping plate 4432 are respectively connected to the bottom of the lifting frame 42 through a sliding pair 444; a plurality of mounting parts 1 4433 and mounting parts 2 4434 are respectively provided at the bottom of the clamping plate 1 4431 and the second clamping plate 4432. In this embodiment, the mounting parts 1 4433 and the second mounting parts 4434 are both "L"-shaped, so that the mounting parts 1 4433 and the second mounting parts 4434 are staggered and arranged relative to each other. One mounting part 1 4433 and one mounting part 2 4434 cooperate to form a working station, and vacuum suction cups 4435 are respectively provided on opposite sides of the two.

[0045] When the lifter 441 drives the movable parts to move up and down, since the splint 1 4431 and the splint 2 4432 are restricted by the sliding pair 444, the movable mode of the movable rod 4423 is limited and they cannot move up and down, so the splint 1 4431 and the splint 2 4432 move relative to each other, so that the mounting part 1 4433 and the mounting part are moved closer to or away from each other, and the vacuum suction cup 4435 fixes the two sides of the battery pack by suction through negative pressure, and when the mounting part 1 4433 and the mounting part are moved away from each other, the opening of the battery pack is expanded.

[0046] In the embodiment of the present invention, the conveying device 12 is arranged in a ring shape, the first liquid injection device 2 and the edge sealing device share a fixed frame 41, the first vacuum debubbling device 31 and the third vacuum debubbling device 33 share a fixed frame 2 71, and the second vacuum debubbling device 32 and the second liquid injection device 4 share a fixed frame 3 72. This can reduce the use of components and make the structure more compact.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0048] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A splash-proof and easily absorbable battery filling production line, characterized by: The invention comprises a frame (11) and a conveying device (12) arranged on the frame (11); the conveying device (12) is provided with a plurality of conveying plates (13); the conveying plates (13) are provided with a plurality of clamps (14) for fixing battery packs; and a loading station (15), a first liquid injection device (2), a first vacuum defoaming device (31), a second vacuum defoaming device (32), a second liquid injection device (4), a third vacuum defoaming device (33), a sealing device (5) and a discharge device (6) are sequentially provided along the conveying device (12); The first liquid injection device (2) and the second liquid injection device (4) are both provided with a plurality of liquid injection needles (47), the liquid injection needles (47) comprising a needle body (471), a flow channel 1 (472) being provided in the needle body (471), at least two through holes communicating with the flow channel 1 (472) being provided on the side of the lower end of the needle body (471), the through holes being connected to a liquid injection portion (473), a flow channel 2 (474) being provided in the liquid injection portion (473), and a liquid injection port (475) being formed at the end of the liquid injection portion (473).

2. The splash-proof liquid easily absorbed battery filling production line according to claim 1, characterized in that: The liquid injection portion (473) and the needle body (471) are integrally formed, and the second flow channel (474) is a straight line inclined downward.

3. The splash-proof liquid easily absorbed battery filling production line according to claim 1, characterized in that: The liquid injection portion (473) is in the shape of an elongated strip, and the angle between the liquid injection portion (473) and the needle body (471) is 100°-120°. The second flow channel (474) extends obliquely along the direction of the liquid injection portion (473).

4. The splash-proof liquid easily absorbable battery filling production line according to claim 1, characterized in that: The injection port (475) is flush with the lower end of the needle body (471), and the angle between the extension line of the second flow channel (474) and the plane of the injection port (475) is 20°-30°.

5. The splash-proof liquid-absorbing battery filling production line according to claim 1, characterized in that: Openings for the battery pack to enter are provided below the first liquid injection device (2), the first vacuum debubbling device (31) and the third vacuum debubbling device (33), and are respectively combined with the conveying plate (13) to form a vacuum chamber.

6. The splash-proof liquid easily absorbable battery filling production line according to claim 1, characterized in that: The unloading device (6) includes a moving assembly (61), an output end of the moving assembly (61) is installed with a fixed beam (62), two side surfaces of the fixed beam (62) are slidably connected with a movable beam 1 (63) and a movable beam 2 (64), and a clamping arm 1 (65) and a clamping arm 2 (66) are staggered below the movable beam 1 (63) and the movable beam 2 (64), and a cylinder 1 (67) and a cylinder 2 (68) are installed on the fixed beam (62) and are connected to the movable beam 1 (63) and the movable beam 2 (64), respectively.

7. The splash-proof liquid easily absorbable battery filling production line according to claim 1, characterized in that: The second liquid injection device (4) includes a fixed frame (41), a lifting frame (42) is installed on the fixed frame (41), a lifting component (43) is installed between the fixed frame (41) and the lifting frame (42), a plurality of vacuum adsorption stations (44) and a lifting component (45) are installed on the lifting frame (42), the lifting component (45) is connected to the liquid injection component (46), and a plurality of liquid injection needles (47) are provided on the liquid injection component (46), the liquid injection needles (47) correspond to the vacuum adsorption stations (44), and the vacuum adsorption stations (44) are used to open the battery pack.

8. The splash-proof liquid easily absorbable battery filling production line according to claim 7, characterized in that: A lifter (441) is installed at the bottom of the lifting frame (42), and a movable frame (4421) is installed at the output end of the lifter (441). A V-shaped movable groove (4422) is provided on the movable frame (4421), and a movable rod (4423) is movably connected in the movable groove (4422). The two movable rods (4423) are respectively connected to a first clamping plate (4431) and a second clamping plate (4432). The first clamping plate (4431) and the second clamping plate (4432) are respectively connected to the bottom of the lifting frame (42) through a sliding pair (444). Several mounting parts 1 (4433) and mounting parts 2 (4434) are respectively provided at the bottom of the splint 1 (4431) and the splint 2 (4432). The mounting parts 1 (4433) and the mounting parts 2 (4434) are arranged relative to each other in a staggered manner, and vacuum suction cups (4435) are respectively provided on the opposite sides.

9. The splash-proof liquid-absorbing battery filling production line according to claim 8, characterized in that: The conveying device (12) is arranged in a ring shape, the first liquid injection device (2) and the edge sealing device share a fixed frame 1 (41), the first vacuum debubbling device (31) and the third vacuum debubbling device (33) share a fixed frame 2 (71), and the second vacuum debubbling device (32) and the second liquid injection device (4) share a fixed frame 3 (72).

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