Vacuum helium-returning full-nail-entering mechanism

Abstract

The utility model discloses a vacuum helium return full nail entering mechanism which comprises an installation frame, a vacuumizing mechanism and a helium filling mechanism are installed on the installation frame, a movable frame is arranged in the vertical direction of the installation frame, the movable frame and the installation frame are connected through a module, a motor installation plate is fixedly installed at the bottom of the movable frame through a bolt, and the motor installation plate is connected with a motor through a bolt. Four groups of stepping motors are fixedly mounted on the motor mounting plate, a limiting plate is connected below the stepping motors, a connector is mounted below the limiting plate, an airtight assembly is mounted on the connector, and pressing nails are connected to the bottoms of the stepping motors. According to the utility model, the sealing effect of the lithium battery in the vacuumizing and helium filling process is improved, and the quality of the battery is prevented from being influenced by gas leakage.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery processing technical field, concretely is a kind of vacuum helium back full entry nail mechanism. BACKGROUND

[0002] To ensure the quality of lithium battery formation, usually need to carry out liquid injection operation;First, the liquid injection of square lithium battery injection port is carried out, after liquid injection is completed, lithium battery injection hole is plugged with formation nail, then the square lithium battery that passes is placed sequentially to high-temperature stationary environment and is formed operation, due to the change of environment, the formation nail on the injection port of lithium battery will become loose, in turn lead to the internal space of square lithium battery, reduce the quality of square lithium battery;To ensure the production quality of lithium battery, square lithium battery needs to be sealed injection port again;Therefore, square lithium battery needs to be punched twice, helium back and sealed operation, to ensure that electrolyte can be completely sealed in the interior of square lithium battery.

[0003] For helium back process, the negative pressure helium back sealing method generally used by existing lithium battery enterprises is to first vacuum the inside of battery shell, then pressurize to punch in helium, at this time, the inside of battery is in micro-negative pressure state, then the sealing glue nail is punched into the battery, but currently, there is poor air tightness problem in vacuumizing and punching in helium, leading to gas leakage, which can affect the quality of lithium battery. UTILITY MODEL CONTENT

[0004] The utility model aims at providing to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of vacuum helium back full entry nail mechanism, including mounting bracket, vacuumizing mechanism and helium filling mechanism are installed on the mounting bracket, vertical direction of the mounting bracket is provided with movable rack, movable rack and mounting bracket are connected by module, the bottom of movable rack is fixedly installed with motor mounting plate by bolt, four groups of stepper motors are fixedly installed on the motor mounting plate, the lower side of stepper motor pair is connected with limit stop, connector is installed below the limit stop, air tightness assembly is installed on the connector, the bottom of stepper motor is connected with nail press.

[0006] Preferably, the air tightness assembly includes a sealing cover, a sliding block, and a fixed block, the sliding block is hollow inside, the sliding block is sleeved below the connector, and the sliding block moves up and down on the connector, the sealing cover is an inverted horn-shaped structure, and the top of the sealing cover is fixedly connected with the sliding block.

[0007] Preferably, the fixed block is installed above the sliding block, the fixed block is fixedly connected with the connector, and a spring is installed between the sliding block and the fixed block.

[0008] Preferably, the inner wall of the sliding block is provided with a sealing ring, and the sealing ring is provided with two groups.

[0009] Preferably, the bottom edge of the sealing cover is provided with a sealing rubber ring.

[0010] Preferably, the motor mounting plate is horizontally arranged, a reinforcing plate is arranged between the movable frame and the motor mounting plate, and two sides of the reinforcing plate are fixedly connected with the movable frame and the motor mounting plate respectively.

[0011] Preferably, a pressure gauge mounting plate is fixedly arranged on the upper portion of the movable frame through bolts, and four groups of counting and indicating pressure gauges are fixedly arranged on the pressure gauge mounting plate.

[0012] Preferably, one end of the vacuumizing mechanism and the helium filling mechanism is connected with the joint.

[0013] Preferably, the pressing nail is a ceramic rod pressing nail.

[0014] Preferably, the vacuumizing mechanism and the helium filling mechanism comprise a vacuum buffer tank, a helium storage tank and a vacuum pressure reducing valve for adjusting the vacuumizing air pressure value, the vacuum buffer tank is used for vacuumizing the inside of the battery, and the communication between the helium storage tank and the inside of the battery realizes the helium returning of the battery.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The utility model discloses a gas-tight assembly is arranged on the joint, in the process that the joint moves downward, the sealing cover is first covered on the battery cell first, then the joint further drops, the sealing cover pushes the sliding block to move up, the sealing cover is tightly attached to the battery cell under the action of the spring, then the vacuum buffer tank is used for vacuumizing the inside of the battery, and the communication between the helium storage tank and the inside of the battery realizes the helium returning of the battery, the whole process gas-tight assembly can guarantee the sealing effect during working, prevents the quality of battery from being influenced by gas leakage, and the gas-tight assembly can also prevent metal dust when pressing the nail. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of the utility model;

[0018] Figure 2 It is the gas-tight assembly side structure schematic diagram of the utility model;

[0019] Figure 3 It is the gas-tight assembly bottom structure schematic diagram of the utility model.

[0020] In the figure: 1, mounting frame; 2, vacuum pumping mechanism; 3, helium filling mechanism; 4, movable frame; 5, motor mounting plate; 6, stepper motor; 7, limit plate; 8, joint; 9, press nail; 10, sealing cover; 11, sliding block; 12, fixed block; 13, spring; 14, sealing ring; 15, sealing rubber ring; 16, reinforcing plate; 17, pressure gauge mounting plate; 18, counting pressure gauge. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Please refer to Figures 1-3 The utility model provides a kind of vacuum helium gas full enters nail mechanism technical scheme: including mounting frame 1, the mounting frame 1 is equipped with vacuum pumping mechanism 2 and helium filling mechanism 3, the vertical direction of the mounting frame 1 is provided with movable frame 4, movable frame 4 is connected between mounting frame 1 by module, the bottom of movable frame 4 is fixedly installed with motor mounting plate 5 by bolt, four groups of stepper motor 6 are fixedly installed on motor mounting plate 5, the lower side of stepper motor 6 is connected with limit plate 7, joint 8 is installed in the lower side of limit plate 7, gas-tight assembly is installed on joint 8, and the bottom of stepper motor 6 is connected with press nail 9.

[0023] As shown in Figure 1 , Figure 2 The gas-tight assembly includes sealing cover 10, sliding block 11 and fixed block 12, the inside of sliding block 11 is hollow structure, sliding block 11 is set below joint 8, sliding block 11 moves up and down on joint 8, sealing cover 10 is inverted horn structure, the top of sealing cover 10 is fixedly connected with sliding block 11, sealing cover 10 can cover battery cell, so as to prevent gas leakage.

[0024] Specifically, the fixed block 12 is installed above the sliding block 11, the fixed block 12 is fixedly connected with the joint 8, the spring 13 is installed between the sliding block 11 and the fixed block 12, the spring 13 can provide the downward pressure of the sealing cover 10, so that the sealing cover 10 can seal the connecting point.

[0025] In the embodiment, the inner wall of the sliding block 11 is provided with a sealing ring 14, the sealing ring 14 is provided with two groups, the sealing performance of the inner wall of the sliding block 11 and the joint 8 can be improved, the bottom edge of the sealing cover 10 is provided with a sealing rubber ring 15, the sealing effect of the sealing cover 10 can be improved, and gas leakage is prevented.

[0026] In combination Figure 1 As shown, the motor mounting plate 5 is horizontally arranged, the reinforcing plate 16 is arranged between the motor mounting plate 5 and the movable frame 4, and the two sides of the reinforcing plate 16 are fixedly connected with the movable frame 4 and the motor mounting plate 5.

[0027] In combination Figure 1 As shown, the pressure gauge mounting plate 17 is fixedly arranged on the upper portion of the movable frame 4 through bolts, and four groups of digital display pressure gauges 18 are fixedly arranged on the pressure gauge mounting plate 17, each battery is designed with a digital display pressure gauge for monitoring and analog output of process parameters, and the pressure control precision is ±3kpa.

[0028] The nail 9 is a ceramic rod nail, and metal dust is avoided.

[0029] In the embodiment, one end of the vacuumizing mechanism 2 and the helium filling mechanism 3 is connected with the joint 8, the vacuumizing mechanism 2 and the helium filling mechanism 3 comprise a vacuum buffer tank, a helium storage tank and a vacuum pressure reducing valve for adjusting the vacuumizing air pressure value, the vacuum buffer tank is used for vacuumizing the inside of the battery, the communication between the helium storage tank and the inside of the battery realizes the helium backfilling of the battery, the vacuumizing and helium pressure of the battery can be adjusted, and the vacuumizing time and the helium injection time can be set.

[0030] Working principle: the utility model discloses a gas-tight assembly is arranged on the joint 8, in the process that the interface 8 moves downwards, first, the sealing cover 10 is covered on the electric core, then the interface 8 further drops, the sealing cover 10 pushes the sliding block 11 to move upwards, the sealing cover 10 is tightly attached to the electric core under the action of the spring 13, then the vacuum buffer tank is used for vacuumizing the inside of the battery, the communication between the helium storage tank and the inside of the battery realizes the helium backfilling of the battery, the gas-tight assembly can guarantee the sealing effect during working, prevents gas leakage from affecting the quality of the battery, and the gas-tight assembly can also prevent metal dust during nail pressing, and has the advantages of simple structure and good use effect.

[0031] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0032] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A vacuum back helium full pin mechanism, comprising a mounting frame (1), a vacuum pumping mechanism (2) and a helium filling mechanism (3) are mounted on the mounting frame (1), characterized in that, The vertical direction of the mounting frame (1) is provided with a movable frame (4), the movable frame (4) and the mounting frame (1) are connected through a module, the bottom of the movable frame (4) is fixedly provided with a motor mounting plate (5) through bolts, four groups of stepping motors (6) are fixedly installed on the motor mounting plate (5), the lower side of the stepping motor (6) is connected with a limiting plate (7), a joint (8) is installed below the limiting plate (7), an airtight assembly is installed on the joint (8), and the bottom of the stepping motor (6) is connected with a press nail (9).

2. The full-penetrating vacuum back-filling helium mechanism according to claim 1, wherein, The airtight assembly comprises a sealing cover (10), a sliding block (11) and a fixed block (12), the sliding block (11) is hollow, the sliding block (11) is sleeved below the joint (8), the sliding block (11) moves up and down on the joint (8), the sealing cover (10) is an inverted horn structure, and the top of the sealing cover (10) is fixedly connected with the sliding block (11).

3. The full-penetrating vacuum back-filling helium mechanism according to claim 2, wherein, The fixed block (12) is installed above the sliding block (11), the fixed block (12) is fixedly connected with the joint (8), and the sliding block (11) and the fixed block (12) are provided with a spring (13) therebetween.

4. The full-penetrating vacuum back-filling helium gas injection mechanism according to claim 3, characterized in that, The inner wall of the sliding block (11) is provided with a sealing ring (14), and the sealing ring (14) is provided with two groups.

5. The full-penetrating vacuum back-filling mechanism of claim 4, wherein, The bottom edge of the sealing cover (10) is provided with a sealing rubber ring (15).

6. The full-penetrating vacuum back-flushing helium inlet mechanism of claim 1, wherein, The motor mounting plate (5) is horizontally arranged, the motor mounting plate (5) and the movable frame (4) are provided with a reinforcing plate (16) therebetween, and the two sides of the reinforcing plate (16) are fixedly connected with the movable frame (4) and the motor mounting plate (5) respectively.

7. The full-penetrating vacuum back-filling helium gas injection mechanism according to claim 1, wherein, The upper side of the movable frame (4) is fixedly provided with a pressure gauge mounting plate (17) through bolts, and four groups of counting pressure gauges (18) are fixedly installed on the pressure gauge mounting plate (17).

8. The full-penetrating vacuum back-filling helium mechanism according to claim 1, wherein, One end of the vacuum mechanism (2) and the helium filling mechanism (3) is connected with the joint (8).

9. The full-penetrating vacuum back-filling helium gas injection mechanism according to claim 1, wherein, The press nail (9) is a ceramic rod press nail.

10. The full-penetrating vacuum back-flushing helium inlet mechanism of claim 1, wherein, The vacuum mechanism (2) and the helium filling mechanism (3) comprise a vacuum buffer tank, a helium storage tank and a vacuum pressure reducing valve for adjusting the vacuum air pressure value, the vacuum buffer tank is used for vacuumizing the inside of the battery, and the communication between the helium storage tank and the inside of the battery realizes the helium backfilling of the battery.

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