Lithium battery helium returning and nailing equipment

Abstract

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to lithium battery helium returning and nailing equipment which comprises a workbench, a vacuumizing mechanism, a helium injection mechanism, a vacuum cavity assembly and a glue nail nailing assembly. The vacuumizing mechanism is mounted on the workbench and is used for vacuumizing the vacuum cavity assembly and the battery; the helium injection mechanism is connected with the gluing nail assembly and is used for injecting helium into the battery through a liquid injection hole of the battery; the vacuum cavity assembly is mounted on the workbench, is in sealing fit with the workbench and is used for sealing an internal battery; the glue nail hitting assembly is installed on the vacuum cavity assembly and used for sealing a liquid injection hole of the battery where helium is injected through a glue nail. According to the utility model, the battery is placed in the cover body, and the cover body and the battery are vacuumized at the same time, so that the interior of the cover body is vacuumized more uniformly, and no pressure difference exists between the inner side and the outer side of the battery shell in the vacuumizing process, so that the battery is prevented from deforming and the electrolyte is prevented from overflowing.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium ion battery technical field, concretely relates to a lithium battery helium back punch equipment. BACKGROUND

[0002] The overall sealing of lithium battery is very important, and helium detection equipment is usually provided in the production line to detect the overall sealing of lithium battery. Therefore, a certain amount of helium needs to be injected into the battery before the battery is sealed. The above-mentioned action is divided into two small processes in the battery mass production line. First, the pre-punching process fixes the length direction of the rubber nail on the liquid injection hole and leaves a gas passage. Second, the full punching process injects helium into the battery after vacuumizing the battery through the gas passage, and then seals the liquid injection hole by pressing the rubber nail.

[0003] With the continuous improvement of the energy density demand of lithium battery, the remaining space in the battery decreases. During the process of using traditional differential pressure equipment to vacuumize and inject helium into the battery in the full punching process, the battery shell deforms and the electrolyte is extracted, which not only challenges the equipment maintenance, but also causes the electrolyte quantity to deviate from the product design, resulting in a decrease in battery performance and failure to meet long-term use requirements.

[0004] A Chinese patent discloses an aluminum shell lithium battery helium back punch equipment and method, application number: CN202211133149.8. The helium back punch equipment includes a main body frame, a helium back punch mechanism, an automatic nail feeding mechanism, an aluminum shell battery constant pressure cavity module, etc. The aluminum shell battery constant pressure cavity module is slidingly installed on the lower tooling platform of the main body frame. The helium back punch mechanism is installed on the upper working platform, which is horizontally arranged above one side of the lower tooling platform. The helium back punch mechanism includes a helium back punch module, two gas supply pipelines for supplying gas to the constant pressure cavity of the aluminum shell battery constant pressure cavity module and the inner cavity of the helium back punch module. The automatic nail feeding mechanism includes a vibration disc, a nail feeding plate, a nail extractor, and a gas cylinder for driving the nail extractor to lift. The nail feeding plate is fixed on one side of the upper working platform, and the nail feeding pipe is connected between the nail feeding channel of the vibration disc and the nail feeding hole on the nail feeding plate. Disadvantages: the patent describes low production efficiency, which is suitable for small-scale production process, and is not suitable for mass production line. The battery interior and the cavity body use two gas supply pipelines, which are unstable in pressure difference during operation, and there is a risk of causing the battery shell to deform. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a lithium battery helium back punch equipment to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a lithium battery back helium punches the equipment of pin, including work table, vacuum mechanism, helium injection mechanism, vacuum cavity subassembly and glue pin subassembly,

[0008] Vacuum mechanism is installed on the work table, is used for vacuumizing vacuum cavity subassembly and battery,

[0009] Helium injection mechanism is connected with glue pin subassembly, is used for injecting helium through the liquid injection hole of battery into battery,

[0010] Vacuum cavity subassembly is installed on the work table and is sealed with it, is used for sealing the battery in,

[0011] Glue pin subassembly is installed on the vacuum cavity subassembly, is used for sealing the liquid injection hole of battery that helium has been injected in with glue pin.

[0012] Preferably, the vacuum mechanism includes a vacuum source, a first pressure relief valve, a first pressure gauge and a first pipeline, one end of the first pipeline is connected with the vacuum source, the other end passes through the workbench and is connected with the air hole on the workbench from the bottom of the workbench, the first pressure relief valve and the first pressure gauge are installed on the first pipeline respectively.

[0013] Preferably, the first pipeline is also provided with a first pressure regulating valve and a first air control valve.

[0014] Preferably, the helium injection mechanism includes a helium source, a second pressure regulating valve, a second air control valve, a second pipeline and a manifold, one end of the second pipeline is connected with the helium source, the other end is connected with one end of the manifold, the second pressure regulating valve and the second air control valve are installed on the second pipeline respectively.

[0015] Preferably, the vacuum cavity subassembly includes a top plate, a guide rod, a cover and a linear bearing, the upper ends of the four guide rods are fixedly connected with the four corners of the top plate, the lower ends of the guide rods are fixedly connected with the workbench, the four corners of the cover are slidingly connected with the guide rods through the linear bearings, the bottom of the cover is open, a first sealing ring is arranged around the bottom, and the air hole on the workbench is located below the cover.

[0016] Preferably, the glue pin assembly comprises a cylinder, a cylinder support, a sleeve, a ceramic pressure rod, a second pressure gauge, a second pressure relief valve, a third pipeline and a glue nozzle, the cylinder is fixed on the upper part of the cover body through the cylinder support, the piston rod of the cylinder is connected with the ceramic pressure rod, the ceramic pressure rod passes through the sleeve, the ceramic pressure rod is a variable-diameter structure, an annular space is formed between the lower end of the ceramic pressure rod and the sleeve, helium flows into the battery from the annular space, a second sealing ring is arranged between the upper end of the ceramic pressure rod and the sleeve, the sleeve passes through the cover body vertically and is sealingly fixed, the lower end of the sleeve is connected with the glue nozzle, the third pipeline is communicated with the sleeve located in the inside of the cover body, and the second pressure gauge and the second pressure relief valve are respectively installed on the third pipeline; the other end of the manifold is communicated with the sleeve located outside the cover body.

[0017] Preferably, the glue assembly is two.

[0018] Preferably, a battery tool for positioning the battery is installed on the workbench.

[0019] Preferably, the battery tool is installed on the pull-out plate, and the pull-out plate is connected with the workbench through a sliding rail.

[0020] Preferably, the second sealing ring is a plurality of and is arranged on the inner wall of the sleeve from top to bottom.

[0021] The utility model discloses beneficial effects are: the utility model discloses through placing the battery in the cover body, vacuumizing the cover body and the battery simultaneously, the vacuum of cover body inside is more uniform, so the pressure difference does not exist in the inside and outside of battery shell during the vacuumizing process, thereby making the battery not to take place deformation and electrolyte overflow, through the first pressure gauge real -time collection battery internal pressure, the pressure value of the second pressure gauge collection cover body inside, make the pressure difference of cover body and battery inside maintain in the deformation pressure range of battery shell, thereby can effectively prevent the deformation of battery shell. ACCURACY OF DRAWINGS

[0022] Figure 1 It is the perspective view of the utility model;

[0023] Figure 2 It is the perspective view of the vacuumizing mechanism in the utility model;

[0024] Figure 3 It is the perspective view of the helium injection mechanism in the utility model;

[0025] Figure 4 It is the perspective view of the vacuum cavity assembly in the utility model;

[0026] Figure 5 It is the perspective view of the glue pin assembly in the utility model;

[0027] Figure 6It is the sectional view of the gluing nail assembly in the utility model;

[0028] The drawings are explained as follows:

[0029] 1, workbench; 11, air hole; 2, vacuumizing mechanism; 21, vacuum source; 22, first pressure relief valve; 23, first pressure gauge; 24, first pipeline; 25, first pressure regulating valve; 26, first pneumatic control valve; 3, helium injection mechanism; 31, helium source; 32, second pressure regulating valve; 33, second pneumatic control valve; 34, second pipeline; 35, manifold; 4, vacuum cavity assembly; 41, top plate; 42, guide rod; 43, cover body; 44, linear bearing; 5, gluing nail assembly; 51, air cylinder; 52, air cylinder support; 53, sleeve; 54, ceramic pressure rod; 55, second pressure gauge; 56, second pressure relief valve; 57, third pipeline; 58, glue nozzle; 59, second sealing ring; 6, battery; 7, battery tooling; 8, pull-out plate. DETAILED DESCRIPTION

[0030] It should be noted that the embodiments in the utility model creation and the features in the embodiments can be combined with each other without conflict.

[0031] In the description of the utility model creation, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model creation and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model creation. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model creation, unless otherwise specified, the meaning of "multiple" is two or more.

[0032] In the description of the utility model creation, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixed connection", "fixed connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model creation can be understood according to the specific circumstances.

[0033] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0034] like Figure 1 As shown, a lithium battery helium return nailing device includes a workbench 1, a vacuuming mechanism 2, a helium injection mechanism 3, a vacuum chamber assembly 4, and a glue-applying nail assembly 5. The vacuuming mechanism is installed on the workbench and is used to evacuate the vacuum chamber assembly and the battery 6. The helium injection mechanism is connected to the glue-applying nail assembly and is used to inject helium into the battery through the battery's injection port. The vacuum chamber assembly is installed on the workbench and is sealed to it to seal the internal battery. The glue-applying nail assembly is installed on the vacuum chamber assembly and is used to seal the injection port of the battery, which has already been injected with helium, with glue nails.

[0035] Specifically, such as Figure 2 As shown, the vacuum pumping mechanism 2 includes a vacuum source 21, a first pressure relief valve 22, a first pressure gauge 23, and a first pipeline 24. One end of the first pipeline is connected to the vacuum source, and the other end passes through the worktable and connects to the vent 11 on the worktable from the bottom. The first pressure relief valve and the first pressure gauge are respectively installed on the first pipeline. The vacuum source can evacuate the vacuum chamber assembly 4 and the battery 6 through the first pipeline. The first pressure gauge 23 can display the pressure inside the vacuum chamber assembly. During the vacuuming process, the vacuum level output by the vacuum source can be adjusted by adjusting the first pressure regulating valve, and the pressure value can be adjusted by relieving pressure inside the vacuum chamber assembly through the first pressure relief valve 22. A first pressure regulating valve 25 and a first pneumatic control valve 26 are also installed on the first pipeline. The first pneumatic control valve 26 controls the opening and closing of the first pipeline 24.

[0036] Specifically, such as Figure 3 As shown, the helium injection mechanism 3 includes a helium source 31, a second pressure regulating valve 32, a second pneumatic control valve 33, a second pipeline 34, and a manifold 35. One end of the second pipeline is connected to the helium source, and the other end is connected to one end of the manifold. The second pressure regulating valve and the second pneumatic control valve are respectively installed on the second pipeline. The pressure of the helium gas is adjusted by adjusting the second pressure regulating valve 32, and the second pipeline 34 is opened and closed by the second pneumatic control valve 33. Helium gas enters the manifold through the second pipeline, then enters the glue-attaching assembly through the manifold, and finally enters the battery through the glue-attaching assembly.

[0037] Specifically, such as Figure 4As shown, the vacuum cavity assembly 4 includes a top plate 41, guide rods 42, a cover 43, and linear bearings 44. The upper ends of the four guide rods are fixed to the four corners of the top plate, and the lower ends of the guide rods are fixed to the workbench. The four corners of the cover are slidably connected to the guide rods through the linear bearings. The bottom of the cover is open, and the cover can be opened and closed manually. The battery can be placed in the cover. To prevent air leakage during vacuumization, a first sealing ring (not shown) is arranged around the cover. After the cover is in contact with the bottom plate, the first sealing ring can be used for sealing, so as to ensure good air tightness of the cover during vacuumization. The air vent on the workbench is located below the cover. During vacuumization, the gas in the cover is extracted by the vacuum source through the air vent on the workbench.

[0038] Specifically, as shown in the drawings, Figure 5 The glue injection assembly includes a pneumatic cylinder 51, a pneumatic cylinder support 52, a sleeve 53, a ceramic pressure rod 54, a second pressure gauge 55, a second pressure relief valve 56, a third pipeline 57, and a glue nozzle 58. The pneumatic cylinder is fixed to the upper part of the cover through the pneumatic cylinder support. The piston rod of the pneumatic cylinder is connected to the ceramic pressure rod. As shown in the drawings, Figure 6 The ceramic pressure rod passes through the sleeve. The ceramic pressure rod has a variable diameter structure. The lower end has a smaller diameter, which can form an annular space with the sleeve. The space is in communication with the third pipeline, so that helium can enter the battery from the annular space. The upper part of the ceramic pressure rod is in close fit with the sleeve, and a second sealing ring 59 is arranged between the two. The ceramic pressure rod can move up and down in the sleeve under the drive of the pneumatic cylinder. The sleeve passes through the cover vertically and is sealingly fixed to the cover. The lower end of the sleeve is connected to the glue nozzle. The glue nozzle first presses the liquid injection hole, and then helium enters the battery from the annular space through the manifold. The second pressure gauge and the second pressure relief valve are respectively installed on the third pipeline. The second pressure gauge 55 can display the internal pressure of the battery. Preferably,

[0039] In order to facilitate positioning of the battery, a battery tool 7 for positioning the battery is installed on the workbench. The battery tool is installed on a pull-out plate 8, which is connected to the workbench through a sliding rail. In use, the battery tool is pulled out from below the cover through the pull-out plate. After the battery is installed, it is placed below the cover.

[0040] The specific operation is as follows:

[0041] The cover 43 is lifted to a certain height and separated from the workbench 1. The pull-out plate 8 moves to the out position. The battery 6 is automatically placed in the battery tool 7. The pull-out plate 8 moves to the return position. The cover 43 is lowered and pressed on the workbench 1. At the same time, the glue nozzle 58 and the liquid injection hole of the battery 6 are pressed and connected.

[0042] Vacuumizing the cover and the battery: close the second air control valve 33, open the second pressure relief valve 56, close the first pressure relief valve 22, adjust the first pressure regulating valve 22 to -60 to -40 Kpa, then open the first air control valve 26, and the vacuum source 21 vacuumizes the cover 43 and the battery 6. When the second pressure gauge 55 shows a stable number, close the first air control valve 26 and the second pressure relief valve 56. Because the second pressure relief valve 56 is opened to connect the battery 6 and the cover 43, and the vacuumizing port is located at the bottom of the cover 43, the vacuum inside the cover is more uniform, so there is no pressure difference between the inside and outside of the battery shell during the vacuumizing process, and no deformation and electrolyte overflow will occur.

[0043] Helium injection to the battery: adjust the second pressure regulating valve 32 to adjust the helium source to -20 to 10 Kpa, then open the second air control valve 33, and the helium source 31 injects helium into the battery. The second pressure gauge 55 displays the internal pressure of the battery in real time. When the pressure value is stable, close the second air control valve 33. During the helium injection process, the first pressure relief valve 22 is opened, and the pressure value inside the cover 43 is obtained through the first pressure gauge 23. The host computer of the equipment collects the values of the first pressure gauge 23 and the second pressure gauge 55 in real time, and adjusts the opening and closing of the first pressure relief valve 22 to maintain the pressure difference between the cover 43 and the battery 6 within the deformation pressure of the battery 6 shell, so as to achieve the purpose of no deformation of the battery 52 shell and no electrolyte overflow from the liquid injection hole.

[0044] Glue pin sealing: the ceramic pressure rod 54 is driven downward by the air cylinder 51 to press the glue pin at the liquid injection hole position of the battery 6 to the predetermined position, and the sealing of the battery is completed.

[0045] The battery is taken out of the cover 43, the first pressure relief valve 22 is opened to release the pressure in the cover 43 to normal pressure, then closed, the cover 43 is lifted to a certain height by the lifting assembly and separated from the workbench 1, the extraction plate 8 automatically moves to the extraction position, and the battery 6 is transferred to the next process to complete this operation.

[0046] For those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered within the scope of protection of the present application.

Claims

1. A lithium battery helium recharging nailer apparatus, characterized by: The workbench, vacuumizing mechanism, helium injection mechanism, vacuum cavity assembly and glue pin assembly are included. The vacuumizing mechanism is installed on the workbench and used for vacuumizing the vacuum cavity assembly and the battery. The helium injection mechanism is connected with the glue pin assembly and used for injecting helium into the battery through the liquid injection hole of the battery. The vacuum cavity assembly is installed on the workbench and used for sealing the battery. The glue pin assembly is installed on the vacuum cavity assembly and used for sealing the liquid injection hole of the battery.

2. The lithium battery helium repurposing nailer of claim 1, wherein: The vacuumizing mechanism includes a vacuum source, a first pressure relief valve, a first pressure gauge and a first pipeline.

3. The lithium battery helium repurposing nailer of claim 2, wherein: The first pipeline is connected with the vacuum source at one end and connected with the air hole on the workbench at the other end.

4. The lithium battery helium repurposing nailer of claim 2, wherein: The first pipeline is also installed with a first pressure regulating valve and a first air control valve.

5. The lithium battery helium recharging nailer of claim 4, wherein: The helium injection mechanism includes a helium source, a second pressure regulating valve, a second air control valve, a second pipeline and a manifold.

6. The lithium battery helium recharging nailer of claim 5, wherein: The vacuum cavity assembly includes a top plate, four guide rods, a cover and linear bearings.

7. The lithium battery helium repurposing nailer of claim 1, wherein: The glue pin assembly includes a cylinder, a cylinder bracket, a sleeve, a ceramic pressure rod, a second pressure gauge, a second pressure relief valve, a third pipeline and a glue nozzle.

8. The lithium battery helium repurposing nailer of claim 1, wherein: The glue pin assembly is two.

9. The lithium battery helium recharging nailer of claim 8, wherein: The workbench is installed with a battery tooling used for positioning the battery.

10. The lithium battery helium recharging nailer of claim 6, wherein: The battery tooling is installed on a pull-out plate connected with the workbench through a slide rail. The second sealing ring is multiple and arranged on the inner wall of the sleeve from top to bottom.

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