A high-efficiency cylindrical battery air tightness detection device

Abstract

The utility model discloses a kind of high -efficient cylindrical cell air-tightness detection device, including fixed base plate, the one end of fixed base plate is equipped with pressure pipe positioning plate, air inlet sealing pressure pipe is installed on pressure pipe positioning plate, adjustable pressure digital display is installed on the upper surface of pressure pipe positioning plate, the other end of fixed base plate is equipped with cylinder, the output end of cylinder is connected with steel shell fixed seat;Sealed after the measured battery is placed in steel shell fixed seat, linear slide rail is also installed on fixed base plate, steel shell fixed seat is slidably connected on linear slide rail.The utility model is connected with two steel shell fixed seats by setting split type ejector rod support and two connecting ends, two sets of measured batteries are driven to move to sealed detection position for rapid detection by cylinder, greatly improve detection efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of power storage lithium-ion battery technology, and specifically relates to a high-efficiency cylindrical battery airtightness testing device. Background Technology

[0002] With the development of power battery technology, cylindrical lithium-ion batteries are increasingly widely used due to their advantages such as good individual consistency, high temperature resistance, safety (not prone to explosion), high energy density, small individual energy, low internal resistance, wide range of applications, and flexible design. The airtightness test after sealing the cylindrical steel shell is a crucial step in the cylindrical battery cell manufacturing process. Before production, the empty steel shell undergoes a grooving, liquid injection, cap welding, and sealing process (6 stations) followed by a pressure test to confirm whether there is leakage or cap defects. The airtightness test after sealing is a critical indicator affecting the sealing effect.

[0003] Traditional airtightness testing devices involve sealing cylindrical steel-cased batteries (6 stations), drilling holes in the bottom of the casing, and vertically placing the batteries in a carrier fixture. A steel tube is then inserted into the bottom of the casing to test the airtightness of the battery cell, and nitrogen is applied. Firstly, this airtightness testing device is a single-station pressure test, resulting in low efficiency. The sealing machine has 6 stations, requiring one test to be completed before moving on to the next, wasting manpower and resources. Secondly, the vertical design of the device is extremely inconvenient for employees and poses safety hazards during testing. Furthermore, the device lacks a digital pressure monitoring device, making it impossible to monitor the pressure in real time, which presents a significant safety risk.

[0004] In order to solve the above problems, this utility model is hereby proposed. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency cylindrical battery airtightness testing device.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A high-efficiency cylindrical battery airtightness testing device includes a fixed base plate, a pressure tube positioning plate installed at one end of the fixed base plate, an air inlet sealing pressure tube installed on the pressure tube positioning plate, an adjustable pressure digital display installed on the upper surface of the pressure tube positioning plate, a cylinder installed at the other end of the fixed base plate, and the output end of the cylinder connected to a steel shell fixing seat; a sealed battery cell to be tested is placed inside the steel shell fixing seat, and a linear slide rail is also installed on the fixed base plate, with the steel shell fixing seat slidably connected to the linear slide rail.

[0008] Preferably, the inlet sealing pressure pipe is provided with a sealing ring at the pipe head.

[0009] Furthermore, the output end of the cylinder is connected to a cylinder connecting shaft, and the cylinder connecting shaft is connected to a split-type push rod bracket, which is connected to a steel shell fixing seat.

[0010] Preferably, the pressure tube positioning plate is provided with a through hole, through which the air inlet sealing pressure tube passes and is fixedly connected to the pressure tube positioning plate.

[0011] Furthermore, the split-type top rod bracket has two connecting ends, which are connected to two steel shell fixing seats.

[0012] Preferably, the cylinder is provided with a rear cylinder fixing component and a front cylinder fixing component at both ends, and a vertical plate fixing component is provided on the rear cylinder fixing component and the front cylinder fixing component, and the cylinder is fixed on the inner side of the vertical plate fixing component.

[0013] Furthermore, stabilizing rods are provided between the upright plate fixing components.

[0014] Beneficial technical effects:

[0015] 1. This utility model improves testing efficiency by setting up a split top rod bracket and two connecting ends, which are connected to two steel shell fixing seats. The cylinder drives two sets of test cells to move to the sealing detection position for rapid detection.

[0016] 2. When switching between different product models, this utility model can be used by simply replacing the steel shell fixing base, which is convenient, quick, and greatly improves the efficiency of model changeover. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of the high-efficiency cylindrical battery airtightness testing device of this utility model.

[0019] In the diagram, 1. Cylinder; 2. Stabilizing rod; 20. Battery cell under test; 21. Fixed base plate; 22. Steel shell fixing seat; 23. Split-type top rod bracket; 24. Adjustable pressure digital display; 25. Pressure pipe positioning plate; 26. Sealing ring; 27. Inlet sealing pressure pipe; 3. Cylinder connecting shaft; 4. Rear cylinder fixing component; 5. Front cylinder fixing component; 8. Linear slide rail; 9. Slider; 10. Vertical plate fixing component. Detailed Implementation

[0020] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0021] Reference Figure 1 As shown, a high-efficiency cylindrical battery airtightness testing device includes a fixed base plate 21. A pressure tube positioning plate 25 is installed at one end of the fixed base plate 21. An inlet sealing pressure tube 27 is installed on the pressure tube positioning plate 25. An adjustable pressure digital display 24 is installed on the upper surface of the pressure tube positioning plate 25, and the position of the adjustable pressure digital display 24 corresponds to the position of the inlet sealing pressure tube 27. The inlet sealing pressure tube 27 and the battery cell 20 under test are on the same horizontal line and correspond one-to-one. A slider 9 is slidably connected to a linear slide rail 8, and a steel shell fixing seat 22 is installed on the slider 9. The inlet sealing pressure tube 27 is used to introduce nitrogen gas, and the inlet sealing pressure tube 27 is connected to a gas filling pipe, which is connected to a nitrogen tank.

[0022] The pressure tube positioning plate 25 serves to fix the airtightness testing mechanism. This fixing base plate has high processing precision, high hardness, and high levelness.

[0023] The adjustable pressure digital display 24 is used to monitor the pressure of the air inlet sealing pressure tube 27. The adjustable pressure digital display 24 corresponds one-to-one with the air inlet sealing pressure tube 27, so that each cell under test 20 has an independent adjustable pressure digital display 24, and the detection performance is reliably improved.

[0024] A cylinder 1 is installed at the other end of the fixed base plate 21, and the output end of the cylinder 1 is connected to the steel shell fixing seat 22; the sealed battery cell 20 is placed inside the steel shell fixing seat 22.

[0025] A linear slide rail 8 is also installed on the fixed base plate 21, and the steel shell fixing seat 22 is slidably connected to the linear slide rail 8. The linear slide rail 8 serves to guide the conveying carrier.

[0026] There are multiple cylinders 1; in this embodiment, there are 3 cylinders 1 and 6 battery cells 20 to be tested. The airtightness of 6 batteries can be tested simultaneously, greatly improving testing efficiency.

[0027] The operation is as follows: the cylinder 1 moves, pushing the steel shell fixing seat 22 to move. The test cell 20 on the steel shell fixing seat 22 is in contact with the air inlet sealing pressure tube 27, because the air inlet sealing pressure tube 27 is fixed on the pressure tube positioning plate 25.

[0028] The inlet sealing pressure tube 27 has a sealing ring 26 at its head. The sealing ring 26 is used to seal the battery cell 20 under test, ensuring that the inlet sealing pressure tube 27 and the battery cell 20 under test are firmly fixed, thereby improving the testing accuracy and confirming the consistency of the test data. This avoids leakage due to poor sealing between the inlet sealing pressure tube 27 and the battery cell 20 under test, which could pose a safety hazard.

[0029] When the air tightness test begins, the air inlet sealing pressure pipe 27 is connected to the nitrogen tank. The cylinder 1 controls the movement of the battery cell 20 under test on the linear slide rail 8. The battery cell 20 under test and the sealing ring 26 of the air inlet sealing pressure pipe 27 are tightly closed. The nitrogen gradually increases, and the adjustable pressure digital display 24 can monitor it in real time.

[0030] The output end of cylinder 1 is connected to cylinder connecting shaft 3, cylinder connecting shaft 3 is connected to split push rod bracket 23, and split push rod bracket 23 is connected to steel shell fixed seat 22.

[0031] The pressure tube positioning plate 25 is provided with a through hole, and the air inlet sealing pressure tube 27 passes through the through hole and is fixedly connected to the pressure tube positioning plate 25.

[0032] The split-type top rod bracket 23 has two connecting ends 7, which are connected to two steel shell fixing seats 22. This device uses a cylinder 1 to drive two sets of test cells 20 to the sealing detection position for rapid detection, greatly improving detection efficiency. In addition, the connection between the split-type top rod bracket 23 and the two steel shell fixing seats 22 has been changed from a vertical structure to a bedroom structure, which is convenient for employees to operate and safe.

[0033] The cylinder 1 is provided with a rear cylinder fixing part 4 and a front cylinder fixing part 5 at both ends. The rear cylinder fixing part 4 and the front cylinder fixing part 5 are respectively provided with a vertical plate fixing part 10. The cylinder 1 is fixed to the inner side of the vertical plate fixing part 10.

[0034] A stabilizing rod 2 is provided between the upright plate fixing parts 10, and the stabilizing rod 2 serves to support the upright plate fixing parts 10.

[0035] This invention addresses the problems of inaccurate, inconvenient, unsafe, and inefficient testing of the airtightness of cylindrical battery seals, as well as the difficulty in controlling pressure.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency cylindrical battery airtightness testing device, characterized in that, The device includes a fixed base plate, a pressure tube positioning plate installed at one end of the fixed base plate, an air inlet sealing pressure tube installed on the pressure tube positioning plate, an adjustable pressure digital display installed on the upper surface of the pressure tube positioning plate, a cylinder installed at the other end of the fixed base plate, and the output end of the cylinder connected to the steel shell fixing seat; the sealed battery cell to be tested is placed inside the steel shell fixing seat, and a linear slide rail is also installed on the fixed base plate, with the steel shell fixing seat slidably connected to the linear slide rail.

2. The high-efficiency cylindrical battery airtightness testing device according to claim 1, characterized in that, The inlet sealing pressure pipe has a sealing ring at the head.

3. The high-efficiency cylindrical battery airtightness testing device according to claim 1, characterized in that, The output end of the cylinder is connected to a cylinder connecting shaft, and the cylinder connecting shaft is connected to a split push rod bracket, which is connected to a steel shell fixing seat.

4. The high-efficiency cylindrical battery airtightness testing device according to claim 1, characterized in that, The pressure tube positioning plate is provided with a through hole, and the air inlet sealing pressure tube passes through the through hole and is fixedly connected to the pressure tube positioning plate.

5. The high-efficiency cylindrical battery airtightness testing device according to claim 3, characterized in that, The split-type top rod bracket has two connecting ends, which are connected to two steel shell fixing seats.

6. The high-efficiency cylindrical battery airtightness testing device according to claim 1, characterized in that, The cylinder is provided with a rear cylinder fixing component and a front cylinder fixing component at both ends, and a vertical plate fixing component is provided on the rear cylinder fixing component and the front cylinder fixing component respectively. The cylinder is fixed to the inner side of the vertical plate fixing component.

7. The high-efficiency cylindrical battery airtightness testing device according to claim 6, characterized in that, A stabilizing rod is provided between the upright plate fixing components.

Images