Battery cell cover plate explosion-proof valve test clamp and test device

Abstract

The utility model provides a battery cell cover plate explosion-proof valve test fixture, which comprises an upper clamping plate and a lower clamping plate which can clamp a battery cell cover plate, a hollow area is preset in the middle of the upper clamping plate, a groove area is arranged on the lower clamping plate, a gas channel is arranged on the lower clamping plate, the gas channel is communicated with a vent hole arranged in the groove area, and the vent hole is communicated with the hollow area. The upper clamping plate and the lower clamping plate are connected through a buckle. According to the utility model, the quality of the explosion-proof valve of the cell cover plate is detected through the upper clamping plate and the lower clamping plate, the cell cover plate and the shell do not need to be welded, test procedures are reduced, error increase caused by multi-step test is avoided, and other procedures and materials are not needed in the test process, so that the test cost is reduced to the greatest extent, the test time is saved, and the test efficiency is improved. Therefore, the test efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery manufacturing, specifically relates to a kind of battery cell cover plate explosion valve test fixture and testing device. BACKGROUND

[0002] Battery as the main power source and energy storage product of new energy vehicle, because of its key role in electric vehicle and is concerned about.With the mass production of new energy battery and cost control, the importance of safety performance is increasingly prominent.Battery cell cover plate, explosion valve as important safety components, its air tightness, pressure resistance quality detection has become the key link to ensure the safety performance of battery product.At present, the detection technology of battery cell cover plate and explosion valve has gradually been widely concerned and developed, and the related technology is rising.In recent years, various innovative detection methods and devices have appeared, through accurate air tightness test, pressure test and automatic detection system, the quality of battery cell cover plate and explosion valve is screened and evaluated.

[0003] The utility model of a kind of cylindrical battery cell explosion valve pressure value testing device is disclosed in Chinese utility model patent literature with publication number CN218035632U, it is proposed that by connecting cover plate air hole with battery cell, gas enters battery cell interior, the opening critical value of explosion valve and the pressure value of battery cell explosion valve are measured;Chinese invention patent literature with publication number CN116067971A discloses explosion valve detection method, device and system, a detection method capable of batch detecting whether explosion valve is damaged;Chinese invention patent literature with publication number CN116558737A discloses a kind of compatible battery cell pressure test device and its using method, for testing the method of battery cell weld and explosion valve pressure resistance performance;Chinese invention patent literature with publication number CN117723491A discloses battery cell explosion valve detection system and detection method, image acquisition is carried out through detection system, batch detection of explosion valve dirt condition is realized.

[0004] From the above prior art, the test method of existing battery cover plate explosion valve needs to be welded with battery cell cover plate and shell by laser welding technology first, and then tested, and the test procedure is complicated, and the additional error in the test process may be increased by multi-process operation;Before testing, cover plate and shell need to be laser welded, which consumes a lot of manpower and material resources, resulting in high test cost;The preparation work before testing involves multiple processes, which takes a long time and affects the overall test efficiency. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is how to reduce test cost and improve test efficiency.

[0006] The utility model solves the above technical problems by the following technical means:

[0007] The first aspect of the present invention provides a battery cover explosion-proof valve test fixture, comprising an upper clamping plate and a lower clamping plate capable of clamping the battery cover plate, wherein a hollow area is preset in the middle of the upper clamping plate, the lower clamping plate is provided with a groove area, the lower clamping plate is provided with a gas channel, and the gas channel is connected to the vent hole provided in the groove area, and the upper clamping plate and the lower clamping plate are connected by a snap buckle.

[0008] Beneficial effects: The utility model uses the upper and lower clamping plates to perform quality inspection on the explosion-proof valve of the battery cover. There is no need to weld the battery cover to the shell, which reduces the testing process and avoids the increase in errors caused by multi-step testing. The testing process does not require other processes and materials, thereby minimizing the testing cost and saving testing time, thereby improving testing efficiency.

[0009] Preferably, the lower clamping plate is embedded with a rubber pad, and the rubber pad is fixed around the groove area.

[0010] Beneficial effect: The utility model arranges a rubber pad on the lower clamping plate, so that the battery cover plate fits tightly with the upper and lower clamping plates, achieving a sealed effect.

[0011] Preferably, a gas pipe joint is provided at one end of the gas channel.

[0012] Preferably, the upper and lower clamping plates are made of metal or alloy.

[0013] A second aspect of the present invention provides a battery cover explosion-proof valve testing device, comprising the battery cover explosion-proof valve testing fixture and an air pressure detection device, wherein the air pressure detection device is connected to the air pressure detection device.

[0014] Beneficial effect: The utility model detects the explosion-proof valve of the battery cover through the battery cover explosion-proof valve test fixture and the air pressure detection device. The detection time only takes 3-5 minutes, which greatly shortens the detection time and improves the detection efficiency.

[0015] Preferably, the air pressure detection device includes an air source and an air pipe, one end of the air pipe is connected to the battery cover explosion-proof valve test fixture, and the other end is connected to the air source.

[0016] Preferably, the air pipe is provided with a flow meter, and the flow meter is arranged at one end of the air pipe close to the battery cover explosion-proof valve test fixture.

[0017] Beneficial effect: The utility model observes whether there is gas leakage in the entire gas pipeline through the flow meter, and then can detect the air tightness of the explosion-proof valve of the battery cover.

[0018] Preferably, the air pipe is provided with a pressure regulating valve, and the pressure regulating valve is arranged at one end of the air pipe close to the air source.

[0019] Beneficial effect: The utility model adjusts the gas pressure through the pressure regulating valve, thereby adjusting the test gas pressure.

[0020] Preferably, the gas source includes an air compressor, and the air compressor is provided with an air pressure gauge.

[0021] Beneficial effect: The utility model reads the bursting pressure value of the explosion-proof valve of the battery cover through a pressure gauge.

[0022] Preferably, the flow meter comprises a suspended flow meter, one end of which is connected to the pressure regulating valve via a thread, and the other end is connected to the air pipe.

[0023] The advantages of the present invention are: the present invention uses the cell cover explosion-proof valve testing device to screen and detect the quality of the cell cover explosion-proof valve, without the need for additional process intervention, and can directly test the cell cover, avoiding the increase in errors caused by multi-step testing; the testing process does not require other processes and materials, thereby minimizing the testing cost; the average testing time of the present invention is 3-5 minutes per unit, which significantly improves the testing efficiency; the compression of the test time not only improves the online efficiency of the cell cover explosion-proof valve, but also reduces unnecessary waiting time during equipment operation, and incoming materials from the warehouse can also be circulated in a timely manner; under the premise of ensuring test accuracy, the cell cover is quality screened at a lower testing cost, thereby ensuring the quality of the battery cells and finished batteries, and achieving significant results in reducing costs and increasing efficiency for the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 2. It is a schematic diagram of the upper splint structure in the embodiment;

[0025] Figure 2 2. It is a schematic diagram of the lower splint structure in the embodiment;

[0026] Figure 3 2. This is a side view of a test fixture for the explosion-proof valve of a cell cover in an embodiment;

[0027] Figure 4 2. It is a structural diagram of the air pressure testing device in the embodiment;

[0028] Figure 5 Schematic diagram of the structure of the battery cover explosion-proof valve testing device in the embodiment. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention; in addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] Example 1

[0032] according to Figure 1-3As shown, this embodiment provides a battery cover explosion-proof valve test fixture, including an upper clamping plate 10 and a lower clamping plate 20 that can clamp the battery cover. A hollow area 11 is preset in the middle of the upper clamping plate 10. The shape of the hollow area 11 is consistent with the shape of the battery cover, but the size of the hollow area 11 is slightly smaller than the battery cover, and the explosion-proof valve on the battery cover can be exposed, so that the explosion-proof valve can be blasted to release pressure during testing; the lower clamping plate 20 is provided with a groove area 24, and the groove area 24 is used to receive the battery cover. A rubber pad 40 is embedded in the lower clamping plate 20, and the rubber pad 40 is fixed in the groove area 2 4, the rubber pad 40 makes the battery cover fit tightly with the upper and lower plywood to achieve a sealed effect; the lower plywood 20 is provided with a gas channel 22, one end of the gas channel 22 is communicated with the vent 23 provided in the groove area 24, the vent 23 is communicated with the battery cover, the vent 23 ventilates the battery cover, and the other end is provided with a trachea joint 21, the upper plywood 10 and the lower plywood 20 are connected by a snap 30, and the battery cover is fixed in the middle of the upper and lower plywood for testing the quality of the explosion-proof valve, and the upper plywood 10 and the lower plywood 20 are made of stainless steel.

[0033] Example 2

[0034] according to Figure 4-5 As shown, this embodiment provides a battery cover explosion-proof valve testing device, and the battery cover explosion-proof valve testing device of this embodiment performs quality testing on the battery cover explosion-proof valve by air pressure blasting, which includes the battery cover explosion-proof valve testing fixture and the air pressure detection device 50 of Example 1, and the air pressure detection device 50 is connected to the battery cover explosion-proof valve testing fixture through an air pipe joint 21.

[0035] The air pressure detection device 50 includes an air source, an air pipe 54, a flow meter 51 and a pressure regulating valve 52. The air source is connected to the air pipe 54, and the air pipe 54 is connected to the air pipe joint 21. The flow meter 51 and the pressure regulating valve 52 are arranged in the air pipe 54. The flow meter 51 is arranged near the battery cover explosion-proof valve test fixture, and the pressure regulating valve 52 is arranged near the air source. The flow meter 51 and the pressure regulating valve 52 are connected by threads. The air source used in this embodiment is an air compressor 53, and the air compressor 53 is provided with a pressure gauge 531. The pressure value when the explosion-proof valve explodes can be read through the pressure gauge 531. The flow meter 51 is a suspended flow meter.

[0036] The working principle of the battery cover explosion-proof valve testing device of this embodiment is as follows:

[0037] First, seal the injection hole on the battery cover with AB glue, fix the lower plywood 20 and the rubber pad 40, then place the battery cover on the rubber pad 40, connect the vent 23 with the battery cover, then cover the upper plywood 10 on the battery cover, use the snap 30 to fix the connection, use the battery cover explosion-proof valve test fixture to clamp the battery cover for testing, and then connect the battery cover explosion-proof valve test fixture to the air pressure detection device 50 through the air pipe joint 21.

[0038] After the assembly is completed, first use the air compressor 53 to introduce gas, ventilate the battery cell cover through the vent hole 23, close the regulating valve 52, and observe whether there is any change in the suspension flow meter. If there is a change, it indicates that the air tightness of the battery cell cover explosion-proof valve is poor, and the quality of the battery cell cover explosion-proof valve is unqualified, and there is no need to test the withstand voltage value; if there is no change, it indicates that the air tightness of the battery cell cover explosion-proof valve is good, then gradually increase the air pressure until the battery cell cover explosion-proof valve explodes, and read the explosion pressure value through the pressure gauge.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A battery cover explosion-proof valve test fixture, characterized in that: The invention comprises an upper clamping plate (10) and a lower clamping plate (20) capable of clamping a cell cover plate, wherein a hollow area (11) is preset in the middle of the upper clamping plate (10), and a groove area (24) is provided on the lower clamping plate (20). The lower clamping plate (20) is provided with a gas channel (22), and the gas channel (22) is communicated with a vent hole (23) provided in the groove area (24). The upper clamping plate (10) and the lower clamping plate (20) are connected by a buckle (30).

2. The battery cover explosion-proof valve test fixture according to claim 1, characterized in that: The lower clamping plate (20) is embedded with a rubber pad (40), and the rubber pad (40) is fixed around the groove area (24).

3. The battery cover explosion-proof valve test fixture according to claim 1, characterized in that: One end of the gas channel (22) is provided with a gas pipe joint (21).

4. The battery cover explosion-proof valve test fixture according to claim 1, wherein the upper clamping plate (10) and the lower clamping plate (20) are made of hard metal material.

5. A battery cover explosion-proof valve testing device, characterized in that: The invention comprises a battery cover explosion-proof valve test fixture according to any one of claims 1 to 4 and an air pressure detection device (50), wherein the air pressure detection device (50) is connected to the battery cover explosion-proof valve test fixture.

6. The battery cover explosion-proof valve testing device according to claim 5, characterized in that: The air pressure detection device (50) comprises an air source and an air pipe (54); one end of the air pipe (54) is connected to a battery cover explosion-proof valve test fixture, and the other end is connected to the air source.

7. The battery cover explosion-proof valve testing device according to claim 6, characterized in that: The air pipe (54) is provided with a flow meter (51), and the flow meter (51) is provided at one end of the air pipe (54) close to the battery cover explosion-proof valve test fixture.

8. The battery cover explosion-proof valve testing device according to claim 7, characterized in that: The air pipe (54) is provided with a pressure regulating valve (52), and the pressure regulating valve (52) is arranged at one end of the air pipe (54) close to the air source.

9. The battery cover explosion-proof valve testing device according to claim 6, characterized in that: The air source comprises an air compressor (53), and the air compressor (53) is provided with an air pressure gauge (531).

10. The battery cover explosion-proof valve testing device according to claim 7, characterized in that: The flow meter (51) comprises a suspension flow meter, one end of which is connected to a pressure regulating valve (52) via a thread, and the other end of which is connected to an air pipe (54).

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