Battery cell aluminum shell voltage withstanding test equipment

Abstract

The utility model discloses a voltage-withstanding test device for an aluminum shell of a battery cell, which belongs to the technical field of voltage-withstanding test machines and comprises a cabinet body, a control system arranged at the top of the cabinet body, and a voltage-withstanding test mechanism, a power gas source, an aluminum shell test gas source and a gas source monitoring system arranged in the cabinet body, the device is characterized in that an aluminum shell opening portion pressing mechanism is further arranged between the aluminum shell opening portion guide sealing mechanism and the shell body pressing mechanism, an opening portion pressing plate is of a hollow structure with a groove, the aluminum shell is sleeved with the opening portion pressing plate, and the outer edge of the upper end face of the testing inserting groove is arranged to be of a chamfered structure. The beneficial effects of the utility model are that ventilation is realized to meet test requirements, sealing performance is increased to avoid air leakage, the support guide rod cooperates with the guide plate to greatly improve the stability of the device, and the shell opening guide sealing mechanism prevents the aluminum shell opening from deformation and air leakage.

Description

Technical field:

[0001] The utility model belongs to the technical field of voltage withstand test machines, and more specifically relates to voltage withstand test equipment for an electric core aluminum shell. Background technology:

[0002] In the new energy industry, battery shells include square shells, cylindrical shells, etc. Because the battery shell is used to place battery cells and electrolytes, in order to ensure the stability and safety of the battery, the shell mouth is notched to prevent explosion-proof, so as to prevent the pressure from being released when the pressure changes inside the battery; in order to ensure the stable performance of the explosion-proof notch, the aluminum shell pressure test is required to ensure its stability and provide parameter adjustment for the explosion-proof notch. The existing method is to weld a baffle at the mouth of the aluminum shell to seal the hole for air intake, pass the gas into the water for observation, and manually record the peak leakage data after leakage. Using this method for detection requires welding the baffle, which affects the test efficiency, and the manually recorded values ​​are inaccurate. Because the introduced gas is high-pressure gas, there is a certain danger in the surrounding environment.

[0003] The national invention patent with patent number 202211256743.6 discloses a battery cell aluminum shell pressure test machine and test method. The designed pressurized cylinder and pressurized plate perform secondary pressurization on the upper fixture pressure plate to ensure that the aluminum shell is stably located between the upper and lower fixtures to ensure air tightness. The test can be completed quickly and accurately, but the device is prone to deformation and leakage of the shell mouth. Utility model content:

[0004] In order to solve the above problems and overcome the shortcomings of the prior art, the utility model provides a battery core aluminum shell withstand voltage test device;

[0005] The first technical problem to be solved is that the pressurized cylinder and pressurized plate designed in the existing battery core aluminum shell pressure testing machine are prone to deformation and air leakage at the shell mouth.

[0006] The utility model solves the above technical problems with a specific technical solution: the battery core aluminum shell withstand voltage test equipment comprises a cabinet, a control system is arranged on the top of the cabinet, a withstand voltage test mechanism, a power gas source, an aluminum shell test gas source and a gas source monitoring system are placed in the cabinet, the withstand voltage test mechanism comprises an aluminum shell mouth guide sealing mechanism and a shell pressing mechanism, and is characterized in that:

[0007] The aluminum shell mouth guide sealing mechanism comprises a guide plate and a bottom plate. The bottom plate is fixedly arranged on the inner end surface of the cabinet body, the guide plate is fixed on the bottom plate, a test slot for embedding the aluminum shell is provided at the center of the guide plate, the test slot is plugged and sealed with the mouth of the aluminum shell through a sealing strip, an air inlet hole and a gas flow channel are provided inside the guide plate and the bottom plate, and the test gas of the aluminum shell test gas source enters the interior of the aluminum shell through the air holes and the gas flow channel of the bottom plate and the guide plate through the pipeline;

[0008] A shell pressing mechanism is arranged above the aluminum shell mouth guide sealing mechanism, including a shell pressing plate for pressing down the aluminum shell and a shell pressing cylinder for driving the shell pressing plate to reciprocate in the vertical direction;

[0009] An aluminum shell mouth clamping mechanism is also arranged between the aluminum shell mouth guiding sealing mechanism and the shell body clamping mechanism, including a mouth pressure plate and a mouth pressure plate clamping cylinder driving the mouth pressure plate to reciprocate in the vertical direction. The mouth pressure plate is a hollow structure with a groove, and the mouth pressure plate is sleeved on the outside of the aluminum shell.

[0010] Furthermore, a preset number of support guide rods are arranged on the inner end surface of the cabinet in the vertical direction, and the mouth pressure plate guide drive plate and the shell pressure plate guide drive plate are sequentially sleeved on the support guide rods, and the ends of the support guide rods are fixed on the shell clamping cylinder fixing seat.

[0011] Furthermore, the mouth pressure plate pressing cylinder is fixed on the inner end surface of the cabinet, and the output end is fixedly connected to the mouth pressure plate guide drive plate and the mouth pressure plate through a connecting plate.

[0012] Furthermore, the housing clamping cylinder fixing seat fixes the housing clamping cylinder in the vertical direction, and the output end of the housing clamping cylinder is fixedly connected to the housing clamping plate guide drive plate and the housing clamping plate through a connecting plate.

[0013] Furthermore, the power gas source is used to drive the shell pressing cylinder and the mouth pressure plate pressing cylinder.

[0014] Furthermore, the aluminum shell test gas source is high-pressure nitrogen or high-pressure compressed air.

[0015] The outer edge of the upper end surface of the test slot is arranged in a chamfered structure.

[0016] The beneficial effects of the utility model are:

[0017] One advantage of the utility model is that a test slot for embedding an aluminum shell is provided at the center of the guide plate, the outer edge of the upper end surface of the test slot is arranged in a chamfered structure, the test slot is plugged and sealed with the mouth of the aluminum shell by a sealing strip, the guide plate and the bottom plate are provided with air inlet holes and gas flow channels, so that ventilation is achieved to meet the test requirements, while the sealing is increased to avoid air leakage, and it is also convenient for plugging in to avoid deformation of the aluminum shell caused by rigid collision.

[0018] One advantage of the utility model is that the support guide rod is provided to cooperate with the guide plate, which greatly improves the stability of the device and facilitates the insertion of the aluminum shell into the test slot.

[0019] An aluminum shell mouth clamping mechanism is also arranged between the shell mouth guide sealing mechanism and the shell body clamping mechanism. The cylinder of the aluminum shell mouth clamping mechanism retracts to press the mouth pressure plate against the aluminum shell mouth to prevent the aluminum shell mouth from deformation and air leakage. Description of the drawings:

[0020] Attached Figure 1 It is a schematic diagram of the external structure of the utility model;

[0021] Attached Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0022] Attached Figure 3 This is a schematic diagram of the structure of the guide sealing mechanism of the aluminum shell mouth of the utility model;

[0023] Attached Figure 4 This is a schematic diagram of the structure of the aluminum shell mouth clamping mechanism of the utility model; in the accompanying drawings:

[0024] 1. Control system; 2. Cabinet; 11. Shell clamping cylinder; 12. Shell clamping cylinder fixing seat; 13. Mouth pressure plate; 14. Support guide rod; 15. Shell pressure plate; 16. Shell pressure plate guide drive plate; 17. Mouth pressure plate guide drive plate; 18. Mouth pressure plate clamping cylinder; 19. Bottom plate; 20. Guide plate; 21. Sealing strip; 22. Test slot. Specific implementation method:

[0025] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "rear", "lower left", "upper right", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] The specific implementation mode of the utility model: the battery core aluminum shell withstand voltage test equipment comprises a cabinet 2, a control system 1 is arranged on the top of the cabinet 2, a withstand voltage test mechanism, a power gas source, an aluminum shell test gas source and a gas source monitoring system are placed in the cabinet 2, the withstand voltage test mechanism comprises an aluminum shell mouth guide sealing mechanism and a shell pressing mechanism, and is characterized in that:

[0027] The aluminum shell mouth guide sealing mechanism includes a guide plate 20 and a bottom plate 19. The bottom plate 19 is fixedly arranged on the inner end surface of the cabinet 2. The guide plate 20 is fixed on the bottom plate 19. A test slot 22 for embedding the aluminum shell is provided at the center of the guide plate 20. The test slot 22 is plugged and sealed with the mouth of the aluminum shell through a sealing strip 21. Air inlet holes and gas flow channels are provided inside the guide plate 20 and the bottom plate 19. The test gas of the aluminum shell test gas source enters the interior of the aluminum shell through the air holes and gas flow channels of the bottom plate 19 and the guide plate 20 through the pipeline;

[0028] A shell pressing mechanism is arranged above the aluminum shell mouth guide sealing mechanism, including a shell pressing plate 15 for pressing down the aluminum shell and a shell pressing cylinder 11 for driving the shell pressing plate 15 to reciprocate in the vertical direction;

[0029] An aluminum shell mouth clamping mechanism is also arranged between the aluminum shell mouth guiding sealing mechanism and the shell body clamping mechanism, including a mouth pressure plate 13 and a mouth pressure plate clamping cylinder 18 driving the mouth pressure plate 13 to reciprocate in the vertical direction. The mouth pressure plate 13 is a hollow structure with a groove, and the mouth pressure plate 13 is sleeved on the outside of the aluminum shell.

[0030] Furthermore, a preset number of support guide rods 14 are arranged on the inner end surface of the cabinet 2 in the vertical direction, and a mouth pressure plate guide drive plate 17 and a shell pressure plate guide drive plate 16 are sequentially sleeved on the support guide rods 14, and the end of the support guide rod 14 is fixed on the shell clamping cylinder fixing seat 12.

[0031] Furthermore, the mouth pressure plate clamping cylinder 18 is fixed on the inner end surface of the cabinet 2, and the output end is connected to the mouth pressure plate guide driving plate 17, and the mouth pressure plate guide driving plate 17 is fixedly connected to the mouth pressure plate 13 through a connecting plate.

[0032] Furthermore, the housing pressing cylinder 11 fixing seat is used to fix the housing pressing cylinder 11 in the vertical direction, and the output end of the housing pressing cylinder 11 is fixedly connected to the housing pressing plate guide driving plate 16 and the housing pressing plate 15 through a connecting plate.

[0033] Furthermore, the power gas source is used to drive the shell pressing cylinder 11 and the mouth pressure plate pressing cylinder 18.

[0034] Furthermore, the aluminum shell test gas source is high-pressure nitrogen or high-pressure compressed air.

[0035] Furthermore, the outer edge of the upper end surface of the test socket 22 is configured to be a chamfered structure.

[0036] It should be noted that the utility model is a battery core aluminum shell withstand voltage test equipment.

[0037] 1. The power air source is compressed air used to provide the power output required by the cylinder of the test mechanism; the aluminum shell test air source is high-pressure nitrogen or high-pressure compressed air, which is used for positive pressure ventilation detection required for aluminum shell testing; the air source monitoring system is a pressure sensor, which monitors the air intake of the aluminum shell test air source. The above principles are the same as those in the comparative literature and will not be repeated here.

[0038] 2. When the shell pressing cylinder 11 extends, the shell pressing plate 15 moves downward to press the aluminum shell; when the shell pressing cylinder 11 retracts, the shell pressing plate 15 moves upward, and the aluminum shell can be taken out and replaced. The principles are the same as those in the reference literature and will not be repeated here. The difference is that the support guide rod 14 cooperates with the mouth pressing plate guide drive plate 17 and the shell pressing plate guide drive plate 16 to greatly improve the stability of the device, which is conducive to the aluminum shell being plugged into the test slot 22.

[0039] 3. When the mouth pressing plate pressing cylinder 18 is extended, the mouth pressing plate 13 moves upward, and the aluminum shell is not pressed; when the mouth pressing plate pressing cylinder 18 is retracted, the mouth pressing plate 13 moves downward to press the mouth of the aluminum shell; when the aluminum shell is placed, it is placed through the hollow position of the mouth pressing plate 13, so that it will not leak due to its mouth expansion during the ventilation test;

[0040] 4. A bottom plate 19 is fixedly arranged on the inner end surface of the cabinet 2, and a guide plate 20 is fixed on the bottom plate 19. A test slot 22 in which an aluminum shell is embedded is provided at the center of the guide plate 20. The test slot 22 is plugged and sealed with the mouth of the aluminum shell by a sealing strip 21. The sealing strip 21 is used to seal the mouth of the aluminum shell to prevent air leakage during the test and affect the test results. The sealing strip 21 is installed in the test slot 22 of the guide plate 20. The test slot 22 is used to position the product at the test position.

[0041] The aluminum shell is placed in the test slot 22 of the guide plate. The outer edge of the upper end surface of the test slot 22 is set to a chamfered structure. The test slot 22 is plugged and sealed with the mouth of the aluminum shell through the sealing strip 21. The guide plate 20 and the bottom plate 19 are provided with air inlet holes and gas flow channels. The test gas of the aluminum shell test gas source enters the aluminum shell through the pipeline through the air holes and gas flow channels of the bottom plate 19 and the guide plate 20, so that ventilation meets the test requirements, and at the same time, the sealing is increased to avoid air leakage, which is also conducive to plugging to avoid deformation of the aluminum shell caused by rigid collision;

[0042] 5. Start ventilation detection, the gas source monitoring system starts working, monitors pressure changes, and records pressure peak changes. When the pressure reaches the highest peak and begins to drop, the test ends, the aluminum shell test gas source is depressurized, the aluminum shell mouth clamping mechanism cylinder extends, and the shell clamping mechanism cylinder retracts, and the test ends. This step is the same as the principle of the comparative literature and will not be repeated.

[0043] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A battery core aluminum shell withstand voltage test device, comprising a cabinet (2), a control system (1) is arranged on the top of the cabinet (2), a withstand voltage test mechanism, a power gas source, an aluminum shell test gas source and a gas source monitoring system are placed in the cabinet (2), the withstand voltage test mechanism comprises an aluminum shell mouth guide sealing mechanism and a shell pressing mechanism, and is characterized in that: The aluminum shell mouth guide sealing mechanism comprises a guide plate (20) and a bottom plate (19); the bottom plate (19) is fixedly arranged on the inner end surface of the cabinet (2); the guide plate (20) is fixed on the bottom plate (19); a test slot (22) for embedding the aluminum shell is provided at the center of the guide plate (20); the test slot (22) is plugged and sealed with the mouth of the aluminum shell through a sealing strip (21); air inlet holes and gas flow channels are provided inside the guide plate (20) and the bottom plate (19); and the test gas of the aluminum shell test gas source enters the interior of the aluminum shell through the air holes and gas flow channels of the bottom plate (19) and the guide plate (20) through the pipeline; A shell pressing mechanism is arranged above the aluminum shell mouth guide sealing mechanism, comprising a shell pressing plate (15) for pressing down the aluminum shell and a shell pressing cylinder (11) for driving the shell pressing plate (15) to reciprocate in the vertical direction; An aluminum shell mouth clamping mechanism is also arranged between the aluminum shell mouth guide sealing mechanism and the shell body clamping mechanism, comprising a mouth pressure plate (13) and a mouth pressure plate clamping cylinder (18) for driving the mouth pressure plate (13) to reciprocate in the vertical direction. The mouth pressure plate (13) is a hollow structure with a groove, and the mouth pressure plate (13) is sleeved on the outer side of the aluminum shell.

2. The battery core aluminum shell withstand voltage test equipment according to claim 1, characterized in that A preset number of support guide rods (14) are arranged on the inner end surface of the cabinet (2) in the vertical direction, and a mouth pressure plate guide drive plate (17) and a shell pressure plate guide drive plate (16) are sequentially sleeved on the support guide rods (14), and the ends of the support guide rods (14) are fixed on the shell clamping cylinder fixing seat (12).

3. The battery core aluminum shell withstand voltage test equipment according to claim 2 is characterized in that The mouth pressure plate pressing cylinder (18) is fixed on the inner end surface of the cabinet (2), and the output end is fixedly connected to the mouth pressure plate guide drive plate (17) and the mouth pressure plate (13) through a connecting plate.

4. The battery core aluminum shell withstand voltage test equipment according to claim 2, characterized in that The housing pressing cylinder (11) fixing seat fixes the housing pressing cylinder (11) in the vertical direction, and the output end of the housing pressing cylinder (11) is fixedly connected to the housing pressing plate guide drive plate (16) and the housing pressing plate (15) through a connecting plate.

5. The battery core aluminum shell withstand voltage test equipment according to claim 1, characterized in that The power gas source is used to drive the shell pressing cylinder (11) and the mouth pressure plate pressing cylinder (18).

6. The battery core aluminum shell withstand voltage test equipment according to claim 1, characterized in that The aluminum shell test gas source is high-pressure nitrogen or high-pressure compressed air.

7. The battery core aluminum shell withstand voltage test equipment according to claim 1, characterized in that The outer edge of the upper end surface of the test slot (22) is arranged in a chamfered structure.

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