Square battery cover helium detection and pole pressure bearing detection tool and method

Abstract

The invention discloses a square battery cover helium detection and pole pressure-bearing detection tool and method, and belongs to the technical field of battery manufacturing. The square battery cover helium detection and pole pressure-bearing detection tool comprises a cuboid bearing tool with an upper opening; a sealing strip is arranged on the edge of the upper opening; the bearing tool comprises a plurality of pole pressing blocks and battery cover pressing blocks; the bearing tool is connected with helium detection equipment through the helium detection equipment butt joint block. The pressing tool comprises a tool frame, and an air cylinder, a plurality of groups of guide shafts and a plurality of groups of guide bushings are arranged above the tool frame; a lower pressing plate, a pressure sensor and an inner side plate are arranged in the tool frame, and the pressure sensor and a pressure displayer conduct data interaction. The pedal reversing valve is used for controlling the downward pressing and rising actions of the air cylinder; the pressure regulating valve is used for regulating the pressure applied to the battery cover by the lower pressing plate by regulating the air pressure entering the air cylinder; the problem that in the prior art, the helium detection function is lacked while the battery cover pole bears pressure is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of battery manufacturing, and in particular relates to a square battery cover helium detection and pole pressure detection tool and method. Background Art

[0002] The battery cover is usually part of the battery pack, used to seal the battery and protect the internal electrolyte and other electrochemical components from the external environment. The design and manufacture of the battery cover needs to meet the following requirements:

[0003] 1. Sealing: Ensure that there is no electrolyte leakage, which is critical to the safety and performance of the battery;

[0004] 2. Pressure resistance: Able to withstand changes in pressure inside the battery to avoid damage caused by excessive pressure;

[0005] 3. Material chemical resistance: Able to resist corrosion from electrolytes and other chemical reagents.

[0006] Helium leak detection of battery cover is mainly used to test the sealing of battery cover. Helium is a very small molecule that can escape through tiny leaks, making it an important tool for testing sealing. The helium test process usually includes: placing the battery or battery cover in a helium environment so that the battery cover is completely covered with helium; using a helium leak detector to measure the helium concentration or leakage, and any helium leakage through the cover will be detected by the device; judging whether the battery cover is qualified based on the test results.

[0007] The pole pressure test is used to check the pressure-bearing performance of the battery pole (i.e. the positive and negative terminals of the battery). This is to verify the sealing performance of the battery cover pole when under pressure, to ensure that the pole will not leak or be structurally damaged under actual use conditions; the test process usually includes: applying a certain pressure to the pole of the battery cover, and performing helium testing while applying pressure to detect whether there is leakage;

[0008] The current fully automatic square battery helium inspection equipment is usually unable to perform helium inspection while applying pressure to the pole, and basically performs helium inspection and pressure resistance inspection on the square battery cover alone, which cannot simulate the actual use of the battery and still has risks. Therefore, the present invention provides a device suitable for small-batch research and production, which can simultaneously perform pole pressure bearing and helium inspection on the square battery cover. Summary of the invention

[0009] The object of the present invention is to provide a square battery cover helium inspection and pole pressure testing tool and method to solve the technical problem of how to simultaneously perform pole pressure and helium inspection on square battery covers raised in the above background technology.

[0010] In order to achieve the above object, the present invention provides the following technical solutions:

[0011] A square battery cover helium test and pole pressure test tool, comprising:

[0012] A carrying fixture for placing and sealing a square battery cover, used for placing and sealing a square battery cover; a sealing strip is provided on the upper opening edge of the carrying fixture, and the carrying fixture also includes a plurality of pole clamping blocks for applying pressure to the poles of the battery cover and a battery cover clamping block for fixing the main body of the battery cover; the carrying fixture is connected to the helium inspection equipment through a helium inspection equipment docking block;

[0013] A clamping tool for clamping the load-bearing tool, the clamping tool comprising a tool frame, a cylinder, a plurality of guide shafts and guide bushings are arranged on the top of the tool frame; a lower pressing plate, a pressure sensor and an inner side plate are arranged inside the tool frame, and the pressure sensor exchanges data with a pressure display;

[0014] A foot-operated reversing valve used to control the downward and upward movement of the cylinder;

[0015] A pressure regulating valve is used to adjust the pressure applied by the lower pressure plate on the battery cover by adjusting the air pressure of the cylinder.

[0016] Preferably, a handle is provided on one side of the load-bearing tooling, and a groove for embedding a sealing strip is provided on the upper opening edge of the load-bearing tooling.

[0017] Preferably, the supporting tooling includes two pole clamping blocks and one battery cover clamping block; each pole clamping block is provided with a groove matching the battery pole end, the shape of the battery cover clamping block matches the pole clamping block, and the battery cover clamping block as a whole covers and presses the two pole clamping blocks.

[0018] Preferably, the battery cover pressing block is provided with a plurality of through holes for spraying helium during helium inspection.

[0019] Preferably, a load-bearing tool positioning pin is provided on the feeding side of the pressing tool for accurately positioning the load-bearing tool to facilitate precise pressing operation.

[0020] Preferably, the inner side panel is a detachable structure, which facilitates replacement of inner side panels of different thicknesses to accommodate battery covers of different specifications.

[0021] Preferably, the inner side panel is fixed to the tooling frame by bolts.

[0022] Preferably, the tooling frame includes a rectangular bottom plate, a top plate, two side plates and a rear plate; wherein the size of the bottom plate is larger than that of the top plate to provide more stable support and operating space.

[0023] Preferably, the internal side plates and the feeding side of the tooling frame are provided with a notch for observing the compression state of the square battery cover and for connecting the helium inspection equipment docking block with the helium inspection equipment.

[0024] A square battery cover helium inspection and pole pressure inspection method, comprising:

[0025] S1, adjust the pressure regulating valve to the minimum cylinder pressure;

[0026] S2, place the battery cover into the carrier tooling, and make sure that the sealing strip completely covers and extends beyond the battery cover to form a seal;

[0027] S3, push the load-bearing tooling into the clamping tooling through the handle, and the load-bearing tooling positioning pin ensures that the load-bearing tooling is correctly positioned in the clamping tooling;

[0028] S4, step on the pedal reversing valve, the cylinder valve opens, compressed air enters the cylinder, the cylinder drives the lower pressure plate to press down, the lower pressure plate applies pressure to the battery cover and the pole through the battery cover pressing block and the pole pressing block, the guide shaft slides in the guide bushing to ensure the accuracy and stability of the pressing action;

[0029] S5, the pressure sensor monitors the pressure applied to the battery cover pole in real time, and the pressure data is transmitted to the pressure display in real time and displayed. The pressure display determines and adjusts the pressure regulating valve so that the pressure applied to the battery cover pole reaches an appropriate pressure value;

[0030] S6, connect the helium inspection equipment through the helium inspection equipment docking block, draw negative pressure, and spray helium on the inspection part externally to perform helium inspection;

[0031] S7, after the helium inspection is completed, release the pedal reversing valve, the cylinder rises, and the pressure is released; exit the load-bearing tooling, take out the battery cover, and the inspection operation is completed.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The invention provides a square battery cover helium inspection and pole pressure inspection tool and method, which solves the problem of the lack of a battery cover pole pressure and helium inspection function in the prior art, reduces equipment cost, improves operation convenience, and is particularly suitable for small-batch research and production; the invention realizes the function of the battery cover pole being pressurized and helium inspected by designing a combined structure of a load-bearing tool and a pressing tool, solves the problem that the two functions cannot be performed simultaneously in the prior art, simulates the actual use of the battery, and provides a use safety guarantee; the invention adopts a combination of a cylinder, a pressure regulating valve and a pressure sensor, realizes the application of adjustable pressure to the square battery cover pole, and can monitor the pressure value in real time, solving the problem of pressure control and monitoring; the invention realizes compatibility within a certain range by detachable or replaceable pads of different thicknesses, and can adapt to battery covers of different specifications; the cost of a single set of tooling of the invention is controlled below 10,000 yuan, which is much lower than the cost of 200,000 to 500,000 yuan of fully automatic or semi-automatic equipment, solves the high cost problem, and provides an efficient and economical solution for helium inspection and pressure resistance inspection of square battery covers. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall structure of the tooling according to a preferred embodiment of the present invention;

[0035] Figure 2 It is a structural schematic diagram of a load-bearing tooling in a preferred embodiment of the present invention;

[0036] Figure 3 It is a structural schematic diagram of a pressing tool in a preferred embodiment of the present invention;

[0037] Figure 4 It is a schematic diagram of a preferred embodiment of the present invention.

[0038] In the figure: 1. Load-bearing tooling; 2. Clamping tooling; 3. Foot-operated reversing valve; 4. Pressure regulating valve; 5. Locating pin of load-bearing tooling; 6. Helium inspection equipment docking block; 11. Sealing strip; 12. Pole clamping block; 13. Battery cover clamping block; 14. Handle; 21. Tooling frame; 22. Cylinder; 23. Guide shaft; 24. Guide bushing; 25. Lower pressure plate; 26. Pressure sensor; 27. Internal side panel; 28. Pressure display. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. All other embodiments obtained by ordinary technicians in the field without making creative work based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0040] like Figure 1-Figure 4 As shown:

[0041] First preferred embodiment:

[0042] A square battery cover helium test and pole pressure test tool,

[0043] It includes a carrying tool 1 for placing and sealing a square battery cover, which is used for placing and sealing a square battery cover;

[0044] A sealing strip 11 is provided on the upper opening edge of the carrier tooling, which is used to form a seal with the battery cover around, forming a closed cavity during helium inspection, so as to accurately detect whether there is leakage; a groove is provided on the upper opening edge of the carrier tooling for embedding the sealing strip 11, which is used to fix the position of the sealing strip 11 to prevent the sealing strip 11 from falling off during multiple operations.

[0045] A handle 14 is provided on one side of the load-bearing tool 1 to facilitate operators to take and place the load-bearing tool 1;

[0046] The support fixture 1 also includes two pole clamping blocks 12 and a battery cover clamping block 13. Each pole clamping block 12 is provided with a groove matching the battery pole end. The shape of the battery cover clamping block 13 matches the pole clamping block 12 and can cover and press the two pole clamping blocks 12 as a whole. The battery cover clamping block 13 is provided with a plurality of through holes for spraying helium during helium inspection.

[0047] The pole pressing block 12 is used to apply pressure to the pole of the battery cover to simulate the pressure conditions that may be encountered in actual use, so as to perform a pressure resistance test.

[0048] The battery cover pressing block 13 is used to fix the main body of the battery cover to ensure that the battery cover remains stable during the detection process without causing damage to the battery cover.

[0049] The carrying fixture 1 is connected to the helium inspection equipment via a helium inspection equipment docking block 6 . The helium inspection equipment docking block 6 serves as an interface between the carrying fixture 1 and the helium inspection equipment, thereby ensuring the versatility and replaceability of the inspection equipment.

[0050] It also includes a clamping fixture 2 for clamping the load-bearing fixture 1, and the clamping fixture 2 includes a fixture frame 21. The fixture frame 21 serves as the main structure of the entire clamping fixture 2 and supports and fixes other components; the fixture frame 21 includes a rectangular bottom plate, a top plate, two side plates and a rear plate; wherein the size of the bottom plate is larger than that of the top plate to provide a more stable support and operating space; the internal side plate 27 and the feeding side of the fixture frame 21 are provided with a notch for observing the clamping state of the square battery cover and for connecting the helium inspection equipment docking block 6 with the helium inspection equipment.

[0051] A cylinder 22, a plurality of guide shafts 23 and guide bushings 24 are arranged above the tooling frame 21; the guide shafts 23 slide in the guide bushings 24;

[0052] The cylinder 22 is used to drive the lower pressing plate 25 to press the battery cover pressing block 13;

[0053] The guide shaft 23 and the guide bushing 24 are used to ensure the movement accuracy and stability of the lower pressing plate 25 in the vertical movement. The guide shaft 23 slides in the guide bushing 24 to ensure the accuracy and stability of the pressing action.

[0054] The interior of the tooling frame 21 is provided with a lower pressing plate 25, a pressure sensor 26 and an internal side plate 27, the guide shaft 23 is connected to the lower pressing plate 25, and the lower pressing plate 25 applies pressure to the pole through the battery cover clamping block 13 and the pole clamping block 12; the pressure sensor 26 is used to monitor in real time the pressure value applied to the battery cover pole by the clamping tool 2; the pressure sensor 26 interacts with the pressure display 28 to transmit the pressure data to the pressure display 28 in real time and display it; the internal side plate 27 is replaceable, and internal side plates 27 of different thicknesses can achieve compatibility with battery covers of different specifications, thereby improving the applicability and flexibility of the tooling.

[0055] The feeding side of the pressing fixture 2 is provided with a positioning pin of the carrying fixture 1, which is used to accurately position the carrying fixture 1 and ensure that the carrying fixture 1 is in the correct position in the pressing fixture 2 so as to perform an accurate pressing operation;

[0056] It also includes a pressure regulating valve 4 disposed on the tooling frame 21, for adjusting the pressure applied by the lower pressing plate 25 on the battery cover;

[0057] It also includes a foot-operated reversing valve 3, which is used to control the opening and closing of the valve through foot-operated action to control the downward pressure and recovery action of the cylinder 22; when the operator steps on the foot-operated valve, the valve opens to allow compressed air to enter the cylinder 22, causing the cylinder 22 to be pressed downward; when the foot is released, the valve switches position to cause the cylinder 22 to recover.

[0058] Second preferred embodiment:

[0059] A square battery cover helium inspection and pole pressure inspection method, comprising:

[0060] S1, adjust the pressure regulating valve 4 to the minimum pressure of the cylinder 22;

[0061] S2, placing the battery cover into the carrying tooling 1, and confirming that the sealing strip 11 completely covers and extends beyond the battery cover to form a seal;

[0062] S3, push the load-bearing tooling 1 into the pressing tooling 2 through the handle 14, and the positioning pin of the load-bearing tooling 1 ensures that the load-bearing tooling 1 is in the correct position in the pressing tooling 2;

[0063] S4, step on the pedal reversing valve 3, the valve of the cylinder 22 opens, the compressed air enters the cylinder 22, the cylinder 22 drives the lower pressure plate 25 to press down, the lower pressure plate 25 applies pressure to the battery cover and the pole through the battery cover pressing block 13 and the pole pressing block 12, and the guide shaft 23 slides in the guide bushing 24 to ensure the accuracy and stability of the pressing action;

[0064] S5, the pressure sensor 26 monitors the pressure applied to the battery cover pole in real time, and the pressure data is transmitted to the pressure display 28 in real time and displayed. The pressure display 28 determines and adjusts the pressure regulating valve 4 so that the pressure applied to the battery cover pole reaches an appropriate pressure value;

[0065] S6, connecting the helium inspection device through the helium inspection device docking block 6, pumping negative pressure, and spraying helium gas on the inspection part externally to perform helium inspection;

[0066] S7, after the helium inspection is completed, the pedal reversing valve 3 is released, the cylinder 22 rises, and the pressure is released; the carrying tooling 1 is withdrawn, the battery cover is taken out, and a detection operation is completed.

[0067] See also Figure 4 The tooling is powered by compressed air provided by an air source. After being adjusted by a pressure regulating valve 4, the direction of the airflow is controlled by a foot-operated reversing valve 3, and pressure is applied by a cylinder 22 for operation. The pressing tooling 2 fixes the battery cover and the pole by applying pressure to simulate actual pressure conditions. The digital pressure controller is connected to a 220V power supply to monitor and display the applied pressure value in real time to ensure stable operation. The carrying tooling 1 is used to place and fix the battery cover to maintain its stability during the detection process, while the helium detection equipment is also connected to a 220V power supply to focus on helium leak detection of the battery cover sealing. In the entire process, the compressed air supplied by the air source enters the pressing tooling 2 after pressure regulation to determine the direction of the cylinder 22. The pressure controller provides monitoring and feedback to ensure that the operation is within the set pressure range, supports accurate detection and leakage prevention, and can effectively detect the sealing of the square battery cover and the pressure resistance of the pole.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A square battery cover helium test and pole pressure test tool, characterized in that: include: A carrying fixture (1) for placing and sealing a square battery cover; a sealing strip (11) is provided at the upper opening edge of the carrying fixture (1); the carrying fixture (1) comprises a plurality of pole clamping blocks (12) for applying pressure to the poles of the battery cover and a battery cover clamping block (13) for fixing the main body of the battery cover; the carrying fixture (1) is connected to the helium inspection equipment via a helium inspection equipment docking block (6); A clamping tool (2) for clamping a load-bearing tool (1), the clamping tool (2) comprising a tool frame (21), a cylinder (22), a plurality of guide shafts (23) and guide bushings (24) being arranged above the tool frame (21); a lower pressing plate (25), a pressure sensor (26) and an inner side plate (27) being arranged inside the tool frame (21), the pressure sensor (26) exchanging data with a pressure display (28); A foot-operated reversing valve (3) for controlling the downward pressing and upward lifting actions of the air cylinder (22); A pressure regulating valve (4) is used to adjust the pressure applied by a lower pressing plate (25) on a battery cover by adjusting the air pressure of an air cylinder (22).

2. The square battery cover helium inspection and pole pressure inspection tool according to claim 1, characterized in that: A handle (14) is provided on one side of the load-bearing tool (1), and a groove for embedding the sealing strip (11) is provided on the upper opening edge of the load-bearing tool (1).

3. The square battery cover helium inspection and pole pressure inspection tool according to claim 1, characterized in that: The load-bearing tooling (1) comprises two pole clamping blocks (12) and a battery cover clamping block (13); each pole clamping block (12) is provided with a groove matching the battery pole end, the shape of the battery cover clamping block (13) matches the pole clamping block (12), and the battery cover clamping block as a whole covers and presses the two pole clamping blocks (12).

4. The square battery cover helium inspection and pole pressure inspection tool according to claim 1, characterized in that: The battery cover pressing block (13) is provided with a plurality of through holes for spraying helium during helium inspection.

5. The square battery cover helium inspection and pole pressure inspection tool according to claim 1, characterized in that: A positioning pin for the bearing fixture (1) is arranged on the feeding side of the pressing fixture (2).

6. The square battery cover helium inspection and pole pressure inspection tool according to claim 1, characterized in that: The inner side panel (27) is a detachable structure.

7. The square battery cover helium inspection and pole pressure inspection tool according to claim 1, characterized in that: The inner side plate (27) is fixed to the tooling frame (21) by means of bolts.

8. The square battery cover helium inspection and pole pressure inspection tool according to claim 1, characterized in that: The tooling frame (21) comprises a rectangular bottom plate, a top plate, two side plates and a rear plate; wherein the size of the bottom plate is larger than that of the top plate.

9. The square battery cover helium inspection and pole pressure inspection tool according to claim 1, characterized in that: The internal side plate (27) and the feeding side of the tooling frame (21) are provided with a notch for observing the compression state of the square battery cover and for connecting the helium inspection equipment docking block (6) with the helium inspection equipment.

10. A square battery cover helium test and pole pressure test method, characterized in that: include: S1, adjust the pressure regulating valve (4) to the minimum pressure of the cylinder (22); S2, placing the battery cover into the carrying tooling (1), and ensuring that the sealing strip (11) completely covers and extends beyond the battery cover to form a seal; S3, pushing the load-bearing tooling (1) into the pressing tooling (2) through the handle (14), and the positioning pin of the load-bearing tooling (1) ensures that the load-bearing tooling (1) is correctly positioned in the pressing tooling (2); S4, step on the pedal reversing valve (3), the valve of the cylinder (22) opens, compressed air enters the cylinder (22), the cylinder (22) drives the lower pressing plate (25) to press down, the lower pressing plate (25) applies pressure to the battery cover and the pole through the battery cover pressing block (13) and the pole pressing block (12), and the guide shaft (23) slides in the guide bushing (24) to ensure the accuracy and stability of the pressing action; S5, the pressure sensor (26) monitors the pressure applied to the battery cover pole in real time, and the pressure data is transmitted to the pressure display (28) in real time and displayed. The pressure display (28) determines and adjusts the pressure regulating valve (4) so ​​that the pressure applied to the battery cover pole reaches an appropriate pressure value; S6, connecting the helium inspection device through the helium inspection device docking block (6), pumping negative pressure, and spraying helium gas on the inspection part to perform helium inspection; S7, after the helium test is completed, the pedal reversing valve (3) is released, the cylinder (22) rises, and the pressure is released; the carrying tool (1) is withdrawn, and the battery cover is taken out, and a test operation is completed.

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