Device for injecting helium into battery and battery production equipment

Abstract

The utility model discloses a device for injecting helium into a battery and battery production equipment, the device for injecting helium into the battery comprises an upper cavity, a lower cavity and a clamp, the clamp is arranged in the lower cavity, a battery placing position is arranged on the clamp, the lower cavity and the upper cavity are sealed through a sealing piece, and the upper cavity and the lower cavity are sealed through the sealing piece. A positioning base plate is arranged between the clamp and the upper cavity, a floating structure is arranged in the clamp, the upper cavity is connected with a helium injection device, a notch is formed in the end, close to the helium injection device, of the clamp, and when a battery is placed at the battery placing position, a liquid injection opening of the battery is connected with the helium injection device through the notch. The battery production equipment comprises the device, the helium injection device can achieve micro displacement through the floating assembly in the clamp, and precise positioning of battery helium injection is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to a device for injecting helium into a battery and battery production equipment. Background Art

[0002] A battery helium injection fixture refers to a device used to inject helium into a battery. This type of fixture usually includes a fixture body, a seal, and a gas injection port. During the battery helium injection process, the fixture needs to tightly fix the battery at the gas injection port to ensure that helium can smoothly enter the battery. At the same time, the fixture also needs to have good sealing performance to prevent helium leakage.

[0003] The existing battery helium injection fixture mainly relies on the contraction of the seal to achieve the positioning of the battery and the gas injection port. However, after a long period of use, the seal may harden or shrink due to material aging, wear or fatigue, resulting in reduced sealing performance, poor positioning effect and other undesirable conditions, affecting the normal operation of the battery helium injection. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the utility model provides a device for battery helium injection and a battery production equipment. The battery production equipment includes the device. The helium injection device can achieve micro-displacement through a floating component inside a fixture to achieve precise positioning of battery helium injection.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A device for injecting helium into a battery comprises an upper cavity, a lower cavity and a clamp, wherein the clamp is arranged in the lower cavity, a battery placement position is arranged on the clamp, the lower cavity and the upper cavity are sealed by a seal, a positioning substrate is arranged between the clamp and the upper cavity, a floating structure is arranged in the clamp, the upper cavity is connected to a helium injection device, a notch is arranged at one end of the clamp close to the helium injection device, and when the battery is placed in the battery placement position, the liquid injection port of the battery is connected to the helium injection device through the notch.

[0007] Furthermore, a filling block is arranged in the lower cavity, and the sum of the volume of the filling block and the clamp is equal to the volume of the lower cavity.

[0008] Furthermore, a workpiece is arranged on the fixture, and the workpiece is arranged on both sides of the battery placement position for clamping the battery. The floating structure includes a bottom plate, a bearing plate and an elastic component arranged between the bottom plate and the bearing plate, and the bearing plate is arranged at the bottom of the workpiece.

[0009] Furthermore, the elastic component includes a spring and a spring spacer.

[0010] Furthermore, the upper cavity is provided with a vacuum pipe, and the vacuum pipe is communicated with the interior of the clamp.

[0011] Furthermore, the helium injection device comprises a helium injection pipeline and a helium injection nozzle, a helium injection nozzle mounting hole is provided on the upper cavity, and the helium injection nozzle is mounted at the helium injection nozzle mounting hole.

[0012] Furthermore, the helium injection device also includes a pressure switch and a helium injection isolation valve, wherein the helium injection isolation valve is arranged between the pressure switch and the helium injection nozzle. When the helium injection isolation valve is opened, the pressure switch is connected to the inside of the battery to detect the pressure inside the battery.

[0013] Furthermore, the helium injection device also includes a helium injection cylinder, and the helium injection nozzle is connected to the output end of the helium injection cylinder.

[0014] The utility model also provides a battery production device, comprising the device for injecting helium into the battery as described above.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a device for battery helium injection and battery production equipment. The battery production equipment comprises the device. The helium injection device can realize micro-displacement through a floating component inside a fixture to achieve precise positioning of battery helium injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the assembly of the utility model;

[0019] Figure 2 It is a partial cross-sectional view of the utility model;

[0020] Figure 3 It is a structural split diagram of the utility model;

[0021] Figure 4 This is a disassembled diagram of the fixture structure of the utility model;

[0022] Figure 5 It is a schematic diagram of the helium injection device in the utility model;

[0023] Description of reference numerals:

[0024] 1. Lower cavity; 10. Filling block; 2. Upper cavity; 20. Vacuum pipe; 21. Helium injection nozzle mounting hole; 3. Fixture; 30. Notch; 4. Helium injection device; 40. Helium injection nozzle; 41. Helium injection pipeline; 42. Helium injection isolation valve; 43. Pressure switch; 44. Helium injection cylinder; 5. Seal; 6. Floating structure; 60. Spring; 61. Spring spacer; 62. Bottom plate; 63. Loading plate; 7. Workpiece; 70. Positioning substrate. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the utility model can be combined interchangeably without conflicting with each other.

[0026] Reference Figures 1 to 5 The utility model provides a device for battery helium injection, comprising an upper cavity 2, a lower cavity 1 and a fixture 3, wherein the fixture 3 is arranged in the lower cavity 1, a battery placement position is provided on the fixture 3, the lower cavity 1 and the upper cavity 2 are sealed by a seal 5, a positioning substrate 70 is provided between the fixture 3 and the upper cavity 2, a floating structure 6 is provided in the fixture 3, the upper cavity 2 is connected with a helium injection device 4, and a notch 30 is provided at one end of the fixture 3 close to the helium injection device 4, when the battery is placed in the battery placement position, the liquid injection port of the battery is connected with the helium injection device 4 through the notch 30.

[0027] In this embodiment, the helium injection device 4 is disposed on the side of the upper cavity 2 , and the battery is placed horizontally in the fixture 3 so that the battery injection port is aligned with the notch 30 on the fixture 3 , and the helium injection work is performed on the side of the fixture 3 .

[0028] A filling block 10 is disposed in the lower cavity 1, and the sum of the volume of the filling block 10 and the clamp 3 is equal to the volume of the lower cavity 1. The filling block 10 and the clamp 3 fill the space in the lower cavity 1, and the battery can be stably placed at the battery placement position in the clamp 3. When batteries of different sizes need to be replaced, the filling block 10 of the corresponding volume can be adjusted.

[0029] The fixture 3 is provided with a workpiece 7, which is provided on both sides of the battery placement position for clamping the battery, and the floating structure 6 includes a bottom plate 62, a bearing plate 63, and an elastic component provided between the bottom plate 62 and the bearing plate 63, and the bearing plate 63 is provided at the bottom of the workpiece 7. In this embodiment, the elastic component includes a spring 60 and a spring spacer 61. The provision of the spring spacer 61 can, on the one hand, help fix and position the spring 60, so that the spring 60 can maintain the correct position and posture during the assembly process, help improve the assembly accuracy, and ensure that the spring 60 can perform its function. On the other hand, it can also achieve the effect of elastic support and buffering, and reduce the direct contact and collision between the spring 60 and other components.

[0030] In this embodiment, the top of the workpiece 7 corresponds to the positioning reference plate, and the bottom of the workpiece 7 contacts the bottom of the lower cavity 1. It can be understood that during operation, the position of the positioning reference plate is fixed, and the workpiece 7 can move inside the fixture 3 under the action of the elastic component.

[0031] In an actual working scenario, the upper cavity 2 and the positioning reference plate are fixed to the helium injection station, a lifting module is arranged below the helium injection station, the fixture 3 and the lower cavity 1 are arranged on the horizontal moving module, after the battery is placed in the fixture 3, the horizontal moving module drives the lower cavity 1 and the fixture 3 to move to the bottom of the upper cavity 2, and the lifting module drives the lower cavity 1 to move upward, so that the upper cavity 2 and the lower cavity 1 form an enclosed space, and then the workpiece 7 cooperates with the positioning reference plate to realize micro-displacement inside the fixture 3, so as to achieve the effect of follow-up positioning, and the liquid injection port of the battery can be accurately positioned to the helium injection nozzle 40, thereby reducing leakage and improving production yield.

[0032] In this embodiment, the upper cavity 2 is provided with a vacuum pipe 20, and the vacuum pipe 20 is connected to the interior of the upper cavity 2 and the interior of the lower cavity 1. The helium injection device 4 includes a helium injection pipe 41 and a helium injection nozzle 40. The end of the helium injection pipe 41 away from the helium injection nozzle 40 is connected to a three-way pipe, and the other two interfaces of the three-way pipe are respectively connected to an external negative pressure gas source and a helium injection main valve through valves. The valve is controlled to switch different interfaces according to actual needs. A helium injection nozzle mounting hole 21 is provided on the upper cavity 2, and the helium injection nozzle 40 is installed at the helium injection nozzle mounting hole 21. The helium injection device 4 also includes a pressure switch 43 and a helium injection isolation valve 42. The helium injection isolation valve 42 is arranged between the pressure switch 43 and the helium injection nozzle 40. When the helium injection isolation valve 42 is opened, the pressure switch 43 is connected to the inside of the battery for detecting the pressure inside the battery.

[0033] The helium injection device 4 further includes a helium injection cylinder 44, and the helium injection nozzle 40 is connected to the output end of the helium injection cylinder 44. When the helium injection work is not needed, the helium injection nozzle 40 is driven by the helium injection cylinder 44 to retreat to the set position. When the helium injection work is needed, the helium injection nozzle 40 is driven by the helium injection cylinder 44 to extend forward through the helium injection nozzle installation hole 21 and inserted into the liquid injection port of the battery to perform the helium injection work.

[0034] The helium injection workflow of the utility model is:

[0035] After the upper and lower cavities 1 are sealed at the helium injection station, the floating structure 6 inside the fixture 3 cooperates with the positioning reference plate to realize the positioning function of the battery, so that the battery injection port and the helium injection nozzle 40 are at the same level; the helium injection cylinder 44 is controlled to extend forward so that the helium injection nozzle 40 is inserted into the battery injection port. The vacuum pipe 20 on the upper cavity 2 is connected to the external negative pressure gas source to evacuate the upper and lower cavities 1, and the helium injection isolation valve 42 is opened synchronously, so that the pressure switch 43 is connected to the inside of the battery to form an independent environment. At this time, the battery cavity and the upper and lower cavities 1 form two independent space environments.

[0036] When the upper and lower cavities 1 are evacuated, a high vacuum environment is formed, and the inner cavity of the battery forms a low vacuum environment. A pressure difference is formed between the two space environments. At this time, observe whether the value of the pressure switch 43 changes. If it changes, it is judged that the battery leakage is serious, which means that the detected battery is unqualified and the helium inspection work will not be continued. If the value of the pressure switch 43 does not change, continue to inspect the battery: open the valve between the helium injection pipeline 41 and the negative pressure gas source to evacuate the inside of the battery until the internal environment of the battery reaches a certain degree of negative pressure, close the valve between the helium injection pipeline 41 and the negative pressure gas source, open the valve between the helium injection pipeline 41 and the helium injection main valve, and helium is injected into the battery through the pressure switch 43, the helium injection isolation valve 42, and the helium injection nozzle 40 in turn. In the process of injecting helium, the helium injection pipeline 41 is connected to the helium instrument for synchronous detection to determine whether the battery has leakage, and then determine whether the battery is qualified.

[0037] The utility model also provides a battery production device, comprising the above-mentioned device for injecting helium into batteries.

[0038] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A device for injecting helium into a battery, characterized in that: The invention comprises an upper cavity, a lower cavity and a fixture, wherein the fixture is arranged in the lower cavity, a battery placement position is arranged on the fixture, the lower cavity and the upper cavity are sealed by a seal, a positioning substrate is arranged between the fixture and the upper cavity, a floating structure is arranged in the fixture, the upper cavity is connected with a helium injection device, a notch is arranged at one end of the fixture close to the helium injection device, and when the battery is placed in the battery placement position, the liquid injection port of the battery is connected with the helium injection device through the notch.

2. A device for injecting helium into a battery according to claim 1, characterized in that: A filling block is arranged in the lower cavity, and the sum of the volume of the filling block and the clamp is equal to the volume of the lower cavity.

3. The device for injecting helium into a battery according to claim 1, characterized in that: The fixture is provided with a workpiece, which is arranged on both sides of the battery placement position for clamping the battery. The floating structure includes a bottom plate, a bearing plate and an elastic component arranged between the bottom plate and the bearing plate. The bearing plate is arranged at the bottom of the workpiece.

4. The device for injecting helium into a battery according to claim 3, characterized in that: The elastic component includes a spring and a spring spacer.

5. The device for injecting helium into a battery according to claim 1, characterized in that: The upper cavity is provided with a vacuum pipe, and the vacuum pipe is communicated with the inside of the clamp.

6. The device for injecting helium into a battery according to claim 1, characterized in that: The helium injection device comprises a helium injection pipeline and a helium injection nozzle. A helium injection nozzle mounting hole is arranged on the upper cavity, and the helium injection nozzle is mounted at the helium injection nozzle mounting hole.

7. The device for injecting helium into a battery according to claim 6, characterized in that: The helium injection device also includes a pressure switch and a helium injection isolation valve. The helium injection isolation valve is arranged between the pressure switch and the helium injection nozzle. When the helium injection isolation valve is opened, the pressure switch is connected to the inside of the battery to detect the pressure inside the battery.

8. The device for injecting helium into a battery according to claim 6, characterized in that: The helium injection device also includes a helium injection cylinder, and the helium injection nozzle is connected to the output end of the helium injection cylinder.

9. A battery production device, characterized in that: The invention comprises a device for injecting helium into a battery as claimed in any one of claims 1 to 8.

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