CN215680911U

CN215680911U - Liquid injection equipment for soft package lithium ion secondary battery

Info

Publication number: CN215680911U
Application number: CN202120860405.8U
Authority: CN
Inventors: 杨峰; 董其春; 许豪
Original assignee: Wuxi Greenstone Automation Equipment Co ltd
Current assignee: Wuxi Greenstone Automation Equipment Co ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2022-01-28
Anticipated expiration: 2031-04-25

Abstract

The utility model relates to liquid injection equipment of a soft package lithium ion secondary battery, which comprises a top plate, a connecting rod, a cavity sealing cover, a liquid injection unit and a sealing cavity, the upper part of the top plate is provided with a cavity cover opening and closing control, the periphery of the lower part of the top plate is provided with the connecting rod, one end of the connecting rod is fixedly provided with the cavity sealing cover, a plurality of liquid injection units are fixedly arranged above the cavity sealing cover, the device is characterized in that a wall-hanging residual liquid treatment mechanism is arranged inside the liquid injection unit, the sealing cavity is arranged below the cavity sealing cover, the wall-hanging residual liquid treatment mechanism is arranged on the liquid injection unit and is used for scraping redundant injection liquid in the liquid pre-injection cavity, the wall-mounted residual liquid treatment mechanism is driven by the second cylinder through the piston to move up and down in the liquid pre-injection cavity so as to scrape liquid on the inner wall of the liquid pre-injection cavity and prevent electrolyte waste.

Description

Liquid injection equipment for soft package lithium ion secondary battery

Technical Field

The utility model relates to the technical field of battery liquid injection, in particular to liquid injection equipment for a soft package lithium ion secondary battery.

Background

A lithium ion secondary battery. The lithium ion secondary battery generally includes an electrode assembly, a container accommodating the electrode assembly, and an electrolyte. The electrode assembly includes two electrodes and a separator having opposite polarities. The separator includes a porous membrane containing ceramic particle clusters. The porous film is formed by binding particle clusters with a binder. Each particle cluster is formed by sintering or by dissolving and recrystallizing all or part of the ceramic particles. The ceramic particles comprise a ceramic material having a band gap. Each particle cluster may have the shape of a bunch or a thin layer of grapes, and may be formed by laminating scale-or flake-shaped ceramic particles.

The existing liquid injection process of the soft package lithium battery mainly adopts an artificial liquid injection method and a negative pressure self-suction liquid injection method, and has the following defects: 1. the device can generate the phenomenon of repeated liquid injection or electrolyte waste; 2. the degree of automation equipment has the promotion space, and production efficiency is low.

Therefore, it is necessary to provide a liquid injection equipment for soft-packed lithium ion secondary batteries to solve the problems in the background art.

SUMMERY OF THE UTILITY MODEL

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a soft packet of lithium ion secondary battery's notes liquid equipment, its includes roof, connecting rod, cavity closing cap, notes liquid unit and seal chamber, the top of roof is provided with cavity lid open and close control, the below periphery of roof is provided with the connecting rod, the one end of connecting rod is fixed to be provided with the cavity closing cap, the top of cavity closing cap is fixed to be provided with a plurality ofly annotate the liquid unit, the inside of annotating the liquid unit is provided with wall built-up raffinate processing mechanism, the below of cavity closing cap is provided with seal chamber.

Further, as a preferred option, a battery opening mechanism is arranged below the cavity cover and at the lower end of the liquid injection unit, the battery opening mechanism includes a moving block, a first connecting rod and a second connecting rod, a sucker is fixedly arranged on one side of the moving block, one end of the moving block is rotatably connected with the first connecting rod, the other end of the first connecting rod is rotatably connected with the second connecting rod, the second connecting rod is in a horizontal state, a liquid injection needle is fixedly arranged at the center of the second connecting rod, and the first connecting rod and the moving block are provided with two liquid injection needles which are symmetrically arranged with respect to the liquid injection needle.

Further, as preferred, annotate the liquid unit including annotating liquid on-off valve, inlet, gas vent, wall built-up raffinate processing mechanism and liquid and annotate the chamber in advance, liquid is fixed to be provided with in chamber below of annotating in advance annotates the liquid on-off valve, the below of annotating the liquid on-off valve is connected with annotate the liquid needle, the top in chamber is annotated in advance to liquid is provided with wall built-up raffinate processing mechanism, the top in chamber is annotated in advance to liquid is fixed to be provided with the gas vent, the below in chamber is annotated in advance to liquid is fixed to be provided with the inlet.

Further, as preferred, the wall built-up raffinate processing apparatus includes second cylinder and piston, the second cylinder is fixed to be set up liquid is annotated chamber one side in advance, the piston can move up and down the setting in liquid is annotated intracavity portion in advance, the second cylinder is used for driving the piston moves up and down.

Preferably, an electric cylinder is fixedly arranged on one side of the liquid injection unit, and the tail end of the electric cylinder is connected with the moving block and used for pushing the moving block to move left and right.

Further, preferably, the liquid pre-injection chamber is cylindrical.

Further, preferably, 12 liquid injection units are fixedly arranged on the cavity sealing cover.

Preferably, batteries are arranged in the sealed cavity at equal intervals and are arranged right below the liquid injection needle.

Preferably, two suction cups are fixedly arranged on the moving block.

Further, preferably, an air cylinder is fixedly arranged above the cavity cover opening and closing control part.

The utility model has the beneficial effects that:

the device is provided with a wall-hanging residual liquid treatment mechanism on the liquid injection unit for scraping redundant injection liquid in the liquid pre-injection cavity, wherein the wall-hanging residual liquid treatment mechanism is used for scraping the liquid on the inner wall of the liquid pre-injection cavity by moving up and down in the liquid pre-injection cavity under the driving of the second cylinder through the piston so as to prevent the waste of the electrolyte.

This device sets up 12 notes liquid units and can carry out the injection of electrolyte to 12 batteries simultaneously, improves production efficiency.

Drawings

Fig. 1 is a structural diagram of a liquid injection device of a soft package lithium ion secondary battery in the whole machine;

fig. 2 is a schematic structural diagram of a liquid injection device of a soft package lithium ion secondary battery according to the present invention;

fig. 3 is a front view of a liquid injection equipment of a soft package lithium ion secondary battery of the utility model;

FIG. 4 is an enlarged view of a battery opening mechanism in a liquid injection device of a soft package lithium ion secondary battery according to the utility model;

fig. 5 is a side view of a liquid injection equipment of a soft package lithium ion secondary battery according to the utility model;

fig. 6 is a front view of a liquid injection unit in a liquid injection equipment of a soft package lithium ion secondary battery according to the utility model;

fig. 7 is a side view of a liquid injection unit in a liquid injection device of a soft package lithium ion secondary battery according to the utility model;

in the figure: 1. liquid injection equipment; 2. a cylinder; 3. controlling the opening and closing of the cavity cover; 4. a top plate; 5. a connecting rod; 6. sealing the cavity; 7. a liquid injection unit; 8. sealing the cavity; 9. a battery; 10. a battery opening mechanism; 11. a moving block; 12. a suction cup; 13. injecting liquid needle; 14. a first link; 15. a second link; 16. an electric cylinder; 17. an injection opening/closing valve; 18. a liquid inlet; 19. an exhaust port; 20. a wall-mounted residual liquid treatment mechanism; 21. a liquid pre-injection cavity; 22. a second cylinder; 23. a piston.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Example (b): referring to fig. 1-7, an injection device for a soft-package lithium ion secondary battery includes a top plate 4, a connecting rod 5, a cavity cover 6, an injection unit 7 and a seal cavity 8, wherein a cavity cover opening and closing control 3 is disposed above the top plate 4, the connecting rod 5 is disposed on the periphery of the lower portion of the top plate 4, the cavity cover 6 is fixedly disposed at one end of the connecting rod 5, a plurality of injection units 7 are fixedly disposed above the cavity cover 6, a wall-hanging residual liquid treatment mechanism 20 is disposed inside the injection units 7, and the seal cavity 8 is disposed below the cavity cover 6.

The opening and closing control 3 of the cavity cover of the top plate 4 is connected with the cylinder 2, namely the liquid injection equipment 1 is driven to move up and down on the whole machine by the pushing of the cylinder 2, so that the cavity sealing cover 6 and the sealing cavity 8 can be sealed; it should be noted that when the chamber cover 6 and the sealed chamber 8 are sealed, the inside of the sealed chamber 8 is under negative pressure, and the liquid injection unit 7 is under positive pressure, because the existence of the positive pressure difference can make the electrolyte flow into the battery 9; the wall-hung residual liquid treatment mechanism 20 scrapes the electrolyte on the inner wall of the liquid pre-injection cavity by scraping the wall up and down in the liquid pre-injection cavity 21 by using the piston 23.

In this embodiment, a battery opening mechanism 10 is disposed below the cavity cover 6 and at the lower end of the liquid injection unit 7, the battery opening mechanism 10 includes a moving block 11, a first connecting rod 14 and a second connecting rod 15, a suction cup 12 is fixedly disposed on one side of the moving block 11, one end of the moving block 11 is rotatably connected to the first connecting rod 14, the other end of the first connecting rod 14 is rotatably connected to the second connecting rod 15, the second connecting rod 15 is in a horizontal state, a liquid injection needle 13 is fixedly disposed at the center of the second connecting rod 15, wherein the first connecting rod 14 and the moving block 11 are two and are symmetrically disposed about the liquid injection needle 13.

That is to say, when the battery 9 is between two moving blocks 11, the two sides of the battery 9 are sucked by the suckers 12, when the two moving blocks 11 are far from the center, the battery 9 is pulled away by the suckers 12, and when the center is far from the moving blocks 11, the first connecting rod 14 is driven to rotate at the same time, the second connecting rod 15 is driven to translate downwards, and the liquid injection needle 13 is driven to move downwards to complete the electrolyte injection.

In this embodiment, the liquid injection unit 7 includes a liquid injection opening and closing valve 17, a liquid inlet 18, an exhaust port 19, a wall-hanging residual liquid treatment mechanism 20 and a liquid pre-injection cavity 21, the liquid pre-injection cavity 21 is fixedly provided with the liquid injection opening and closing valve 17 below, the liquid injection opening and closing valve 17 is connected with the liquid injection needle 13 below, the wall-hanging residual liquid treatment mechanism 20 is arranged above the liquid pre-injection cavity 21, the exhaust port 19 is fixedly arranged above the liquid pre-injection cavity 21, and the liquid inlet 18 is fixedly arranged below the liquid pre-injection cavity 21.

The vent 19 is provided to vent excess gas inside the liquid priming chamber 21 when the piston 23 is moved upward, ensuring that the movement of the piston 23 inside the liquid priming chamber 21 is not impeded.

In this embodiment, the wall-mounted residual liquid treating mechanism 20 includes a second cylinder 22 and a piston 23, the second cylinder 22 is fixedly disposed at one side of the liquid pre-injection cavity 21, the piston 23 is vertically movable disposed in the liquid pre-injection cavity 21, and the second cylinder 22 is used for driving the piston 23 to vertically move.

That is, the second cylinder 22 is used to drive the piston 23 to move up and down in the liquid pre-filling cavity 21, and the piston 23 is used to scrape the electrolyte on the inner wall of the liquid pre-filling cavity by scraping the wall up and down in the liquid pre-filling cavity 21.

In this embodiment, an electric cylinder 16 is fixedly disposed on one side of the liquid injection unit 7, and the tail end of the electric cylinder 16 is connected with the moving block 11 to push the moving block 11 to move left and right.

In this embodiment, the liquid pre-filling cavity 21 is cylindrical.

In this embodiment, 12 liquid injection units 7 are fixedly disposed on the cavity cover 6.

In this embodiment, the batteries 9 are arranged in the sealed cavity 8 at equal intervals, and the batteries 9 are arranged right below the liquid injection needle 13.

In this embodiment, two suction cups 12 are fixedly disposed on the moving block 11.

In this embodiment, a cylinder 2 is fixedly disposed above the cavity cover opening and closing control 3.

The working principle of the utility model is as follows:

firstly, batteries 9 are placed in a sealed cavity 8 at equal intervals through a front-end device, when the sealed cavity 8 reaches the position under a cavity sealing cover 6, a cylinder 2 pushes an injection device 1 to move downwards to enable the cavity sealing cover 6 to seal the sealed cavity 8, external devices pump the interior of the sealed cavity 8 to form negative pressure, when the batteries 9 are arranged between two moving blocks 11, suckers 12 suck two sides of the batteries 9, then the two moving blocks 11 are far away from the center, the suckers 12 pull the batteries 9 open, and when the moving blocks 11 are far away from the center, the first connecting rod 14 is driven to rotate at the same time, a second connecting rod 15 is driven to translate downwards to drive an injection needle 13 to move downwards to complete electrolyte injection, a second cylinder 22 drives a piston 23 to move upwards and downwards in a liquid pre-injection cavity 21, and the piston 23 is used for scraping up and down the electrolyte on the inner wall of the liquid pre-injection cavity by utilizing the piston 23 to scrape the electrolyte on the inner wall of the liquid pre-injection cavity.

The above examples are intended to further illustrate the present invention, but are not intended to limit the utility model to these specific embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be understood to be within the protection scope of the present invention.

Claims

1. The utility model provides a soft packet of lithium ion secondary battery's notes liquid equipment which characterized in that: it includes roof (4), connecting rod (5), cavity closing cap (6), annotates liquid unit (7) and seal chamber (8), the top of roof (4) is provided with cavity lid switching control (3), the below periphery of roof (4) is provided with connecting rod (5), the one end of connecting rod (5) is fixed to be provided with cavity closing cap (6), the top of cavity closing cap (6) is fixed to be provided with a plurality ofly annotate liquid unit (7), the inside of annotating liquid unit (7) is provided with wall built-up raffinate processing mechanism (20), the below of cavity closing cap (6) is provided with seal chamber (8).

2. The liquid injection equipment of the soft package lithium ion secondary battery according to claim 1, characterized in that: a battery opening mechanism (10) is arranged below the cavity sealing cover (6) and at the lower end of the liquid injection unit (7), the battery opening mechanism (10) comprises a moving block (11), a first connecting rod (14) and a second connecting rod (15), a sucker (12) is fixedly arranged on one side of the moving block (11), one end of the moving block (11) is rotatably connected with the first connecting rod (14), the other end of the first connecting rod (14) is rotatably connected with the second connecting rod (15), the second connecting rod (15) is in a horizontal state, a liquid injection needle (13) is fixedly arranged at the center of the second connecting rod (15), and the first connecting rod (14) and the moving block (11) are arranged in two and are symmetrically arranged relative to the liquid injection needle (13).

3. The liquid injection equipment of the soft package lithium ion secondary battery according to claim 2, characterized in that: annotate liquid unit (7) including annotating liquid on-off valve (17), inlet (18), gas vent (19), wall built-up raffinate processing mechanism (20) and liquid and annotate chamber (21) in advance, liquid is annotated fixed being provided with in chamber (21) below in advance annotates liquid on-off valve (17), the below of annotating liquid on-off valve (17) is connected with annotate liquid needle (13), the top in liquid annotate chamber (21) in advance is provided with wall built-up raffinate processing mechanism (20), the top in liquid chamber (21) of annotating in advance is fixed to be provided with gas vent (19), the below in liquid chamber (21) of annotating in advance is fixed to be provided with inlet (18).

4. The liquid injection equipment of the soft package lithium ion secondary battery according to claim 3, characterized in that: the wall-mounted residual liquid treatment mechanism (20) comprises a second cylinder (22) and a piston (23), the second cylinder (22) is fixedly arranged on one side of the liquid pre-injection cavity (21), the piston (23) can move up and down and is arranged in the liquid pre-injection cavity (21), and the second cylinder (22) is used for driving the piston (23) to move up and down.

5. The liquid injection equipment of the soft package lithium ion secondary battery according to claim 4, characterized in that: an electric cylinder (16) is fixedly arranged on one side of the liquid injection unit (7), and the tail end of the electric cylinder (16) is connected with the moving block (11) and used for pushing the moving block (11) to move left and right.

6. The liquid injection equipment of the soft package lithium ion secondary battery according to claim 3, characterized in that: the liquid pre-injection cavity (21) is cylindrical.

7. The liquid injection equipment of the soft package lithium ion secondary battery according to claim 2, characterized in that: the cavity sealing cover (6) is fixedly provided with 12 liquid injection units (7).

8. The liquid injection equipment of the soft package lithium ion secondary battery according to claim 4, characterized in that: batteries (9) are arranged in the sealed cavity (8) at equal intervals, and the batteries (9) are arranged right below the liquid injection needle (13).

9. The liquid injection equipment of the soft package lithium ion secondary battery according to claim 2, characterized in that: two suckers (12) are fixedly arranged on the moving block (11).

10. The liquid injection equipment of the soft package lithium ion secondary battery according to claim 1, characterized in that: and an air cylinder (2) is fixedly arranged above the cavity cover opening and closing control (3).