Air tightness detection clamp for explosion-proof valve of power battery of new energy automobile

Abstract

The utility model discloses an air tightness detection clamp for a new energy automobile power battery explosion-proof valve, which comprises a power battery provided with an explosion-proof valve, and further comprises a main clamping piece and a communication assembly, one end of the main clamping piece is movably clamped with the outer side of the explosion-proof valve, and the other end of the main clamping piece is movably clamped with the explosion-proof valve. One end of the communication assembly penetrates through the interior of the main clamping piece and is communicated with the anti-explosion valve, the other end of the communication assembly is connected with a gas input piece, and the communication assembly is communicated with an externally-arranged gas tightness detection instrument through the gas input piece; according to the utility model, through the cooperation of the main clamping piece and the communication assembly, the sealing communication between the air tightness detection clamp and the explosion-proof valve is realized, and the traditional sealing communication mode between the air delivery pipe and the explosion-proof valve by adopting an adhesive tape is replaced, so that the air tightness detection process is simplified; in the air tightness detection process, local sealing of the anti-explosion valve can be achieved without adhesive tape, the cost needed in the air tightness detection process is effectively reduced, and the air tightness detection clamp can be repeatedly used.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to an air tightness detection fixture for an explosion-proof valve of a power battery of a new energy vehicle. Background Art

[0002] The power battery of a new energy vehicle generally consists of battery pack modules. The battery pack modules are generally provided with explosion-proof valves. The function of the explosion-proof valve is that when the battery is damaged due to internal or external factors such as short circuit, overcharge, and collision, or the battery generates heat and expands, the originally sealed battery pack module cannot release pressure and will explode. If the explosion-proof valve functions, it will crack and release gas before the gas reaches the explosion limit, thus avoiding the explosion of the battery pack. In addition, during the manufacturing process of the battery pack module, it is generally necessary to detect the air tightness of the battery pack module. First, the various interfaces of the battery pack module are locally sealed, and then an external air tightness detection instrument is hermetically connected to the explosion-proof valve on the battery pack module to input gas into the interior of the battery pack module to detect its air tightness.

[0003] However, there are still some defects in the existing air tightness detection process of battery pack modules, and some practical functions need to be improved. For example, in most existing air tightness detection processes, the sealing connection method between the explosion-proof valve on the battery pack module and the external air tightness detection instrument is only through an air pipe, and then a large amount of adhesive tape is pasted at the connection between the air pipe and the explosion-proof valve to achieve local sealing. This method is very inconvenient, making the air tightness detection process cumbersome. The time cost required for pasting and subsequently removing the adhesive tape is relatively large. At the same time, the consumption of the adhesive tape is relatively large, which also increases the cost required in the air tightness detection process. Moreover, the adhesive tape is discarded after use during the air tightness detection, which also causes a certain degree of waste of resources. Summary of the Utility Model

[0004] In order to solve the problems in the above background art, the purpose of the utility model is to provide an air tightness detection fixture for an explosion-proof valve of a power battery of a new energy vehicle, which realizes the sealed connection between the air tightness detection fixture and the explosion-proof valve through the cooperation of the main clamping member and the communication component, so as to replace the traditional sealed connection method between the air pipe and the explosion-proof valve using adhesive tape.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An airtightness detection fixture for an explosion-proof valve of a power battery of a new energy vehicle, including a power battery installed with an explosion-proof valve. The airtightness detection fixture includes a main clamping member and a connecting component. One end of the main clamping member is movably clamped to the outside of the explosion-proof valve. One end of the connecting component passes through the inside of the main clamping member and is connected to the explosion-proof valve. The other end of the connecting component is connected with a gas input member, and the connecting component is connected to an airtightness detection instrument arranged outside through the gas input member.

[0007] Further, the connecting component includes a connecting contact, an intermediate connecting rod, and a compression spring. One end of the connecting contact is connected to the explosion-proof valve, the other end of the connecting contact is connected to one end of the intermediate connecting rod, the other end of the intermediate connecting rod is connected to the gas input member, the intermediate connecting rod movably passes through the inside of the main clamping member, the compression spring is sleeved on the rod body position of the intermediate connecting rod, one end of the compression spring is in contact and abuts against the connecting contact, and the other end of the compression spring is in contact and abuts against the inner side of the main clamping member.

[0008] Further, a first through hole is opened at the bottom of the main clamping member. A rotatable intermediate block is sleeved on the rod body position of the intermediate connecting rod of the connecting component. The intermediate connecting rod of the connecting component passes through the inside of the main clamping member through the first through hole, and one end of the intermediate block is movably clamped inside the first through hole.

[0009] Further, the connecting contact is provided with a second through hole and a third through hole. The second through hole is arranged above the third through hole and is connected to it. The intermediate connecting rod is provided with a fourth through hole. The upper end of the intermediate connecting rod is inserted into the inside of the third through hole, and the fourth through hole is connected to the second through hole.

[0010] Further, a hand-held fixing member is fixedly sleeved on the rod body position of the intermediate connecting rod. A connecting bolt is clamped between the hand-held fixing member and the gas input member. The hand-held fixing member is provided with a fifth through hole, the gas input member is provided with a gas transmission through hole. The lower end of the intermediate connecting rod passes through the fifth through hole and the connecting bolt in sequence and is connected to the gas input member, and the fourth through hole of the intermediate connecting rod is connected to the gas transmission through hole.

[0011] Further, a gas input port is opened on one side of the gas input member. The gas input member is connected to an airtightness detection instrument arranged outside through the gas input port.

[0012] Further, the explosion-proof valve is provided with a breathable film, and the second through hole of the connecting contact is connected to the breathable film.

[0013] The beneficial effects of the present utility model are as follows:

[0014] (1) One end of the main clamping member of the present utility model is movably clamped to the outer side of the explosion-proof valve, and one end of the communication component passes through the inside of the main clamping member and is connected to the explosion-proof valve. In this way, it replaces the traditional sealing connection method between the gas pipeline and the explosion-proof valve using adhesive tape. When performing airtightness detection, directly clamp one end of the main clamping member to the outer side of the explosion-proof valve and connect one end of the communication component to the air-permeable film on the explosion-proof valve, and then connect the communication component to the airtightness detection instrument set outside through the gas input member. This can effectively simplify the airtightness detection process, save the time cost and actual cost required for the airtightness detection process, and at the same time reduce the waste of resources caused during the airtightness detection process to a certain extent. Moreover, the airtightness detection fixture of the present utility model can be reused multiple times, which conforms to the principles of green and environmental protection. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the airtightness detection fixture in the present utility model;

[0016] Figure 2 It is a schematic diagram of the disassembled structure of the airtightness detection fixture in the present utility model;

[0017] Figure 3 It is a schematic diagram after the overall downward translation of the communication component in the present utility model;

[0018] Figure 4 It is a schematic diagram when the airtightness detection fixture in the present utility model is connected to the explosion-proof valve;

[0019] Figure 5 It is a schematic diagram of the overall structure of the explosion-proof valve in the present utility model;

[0020] Figure 6 It is a top view schematic diagram of the airtightness detection fixture in the present utility model;

[0021] Figure 7 It is a schematic diagram of the state when the intermediate block is clamped to the bottom of the main clamping member in the present utility model;

[0022] Figure 8 It is a schematic diagram of the overall structure of the intermediate connecting rod and the intermediate block in the present utility model;

[0023] Figure 9 It is a schematic diagram of the overall structure of the power battery equipped with the explosion-proof valve in the present utility model.

[0024] In the figure, 1 is an explosion-proof valve, 2 is a power battery, 3 is a breathable film, 4 is a main clamping member, 401 is a first through hole, 5 is a communication component, 501 is a connection contact, 5011 is a second through hole, 5012 is a third through hole, 502 is an intermediate connecting rod, 5021 is a fourth through hole, 503 is a compression spring, 6 is a gas input member, 601 is a gas transmission through hole, 602 is a gas input port, 7 is an intermediate clamping block, 8 is a hand-held fixing member, 801 is a fifth through hole, and 9 is a connecting bolt. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] As shown in the Figures 1-9 accompanying drawings, in the embodiment of the present invention, there is provided a hermeticity detection fixture for an explosion-proof valve of a power battery of a new energy vehicle, including a power battery 2 equipped with an explosion-proof valve 1. The hermeticity detection fixture includes a main clamping member 4 and a communication component 5. One end of the main clamping member 4 is movably clamped to the outside of the explosion-proof valve 1, one end of the communication component 5 passes through the inside of the main clamping member 4 and is connected to the explosion-proof valve 1 in communication, the other end of the communication component 5 is connected with a gas input member 6, and the communication component 5 is connected to an externally provided hermeticity detection instrument through the gas input member 6.

[0027] The communication component 5 of the present invention includes a connection contact 501, an intermediate connecting rod 502, and a compression spring 503. One end of the connection contact 501 is connected to the explosion-proof valve 1 in communication, the other end of the connection contact 501 is connected to one end of the intermediate connecting rod 502 in communication, the other end of the intermediate connecting rod 502 is connected to the gas input member 6 in communication, the intermediate connecting rod 502 movably passes through the inside of the main clamping member 4, and the compression spring 503 is sleeved on the rod body position of the intermediate connecting rod 502. One end of the compression spring 503 is in contact and abuts against the connection contact 501, and the other end of the compression spring 503 is in contact and abuts against the inner side of the main clamping member 4.

[0028] Specifically, the main clamping member 4 and the connection contact 501 can be set to different size specifications to adapt to various explosion-proof valves 1 of different sizes.

[0029] A first through hole 401 is formed at the bottom of the main clamping member 4 of the present utility model. A movable and rotatable intermediate clamping block 7 is sleeved on the rod body position of the intermediate connecting rod 502 of the connecting component 5. The intermediate connecting rod 502 of the connecting component 5 is movably inserted into the interior of the main clamping member 4 through the first through hole 401, and one end of the intermediate clamping block 7 is movably clamped inside the first through hole 401.

[0030] Specifically, the connecting contact 501 is provided with a second through hole 5011 and a third through hole 5012. The second through hole 5011 is located above the third through hole 5012 and is communicated with it. The intermediate connecting rod 502 is provided with a fourth through hole 5021. The upper end of the intermediate connecting rod 502 is inserted into the interior of the third through hole 5012, and the fourth through hole 5021 is communicated with the second through hole 5011.

[0031] Specifically, a hand-held fixing member 8 is fixedly sleeved on the rod body position of the intermediate connecting rod 502. A connecting bolt 9 is clamped between the hand-held fixing member 8 and the gas input member 6. The hand-held fixing member 8 is provided with a fifth through hole 801, and the gas input member 6 is provided with a gas transmission through hole 601. The lower end of the intermediate connecting rod 502 sequentially passes through the fifth through hole 801 and the connecting bolt 9 and is communicated with the gas input member 6. The fourth through hole 5021 of the intermediate connecting rod 502 is communicated with the gas transmission through hole 601.

[0032] One side of the gas input member 6 of the present utility model is provided with a gas input port 602. The gas input member 6 is communicated with an airtightness detection instrument arranged externally through the gas input port 602. The airtightness detection instrument arranged externally is communicated with the gas input port 602 through an externally arranged gas transmission pipe.

[0033] The explosion-proof valve 1 of the present utility model is provided with a breathable film 3, and the second through hole 5011 of the connecting contact 501 is communicated with the breathable film 3.

[0034] Combined with the attached Figures 1-9 , the use process of an airtightness detection fixture for an explosion-proof valve of a new energy vehicle power battery of the present utility model is as follows:

[0035] When in use, first open the protective cover on the explosion-proof valve of the new energy vehicle power battery, so that the breathable film 3 on the explosion-proof valve 1 is exposed to the outside. Subsequently, the user holds both sides of the main clamping member 4 with one hand, and holds the hand-held fixing member 8 with the other hand and pulls it downward. The hand-held fixing member 8 will drive the intermediate connecting rod 502 and the intermediate clamping block 7 on the intermediate connecting rod 502 to move downward. At the same time, the connecting contact 501 communicated with the intermediate connecting rod 502 will also move downward a certain distance inside the main clamping member 4 and the compression spring 503 is in a compressed state, so that the upper end of the intermediate clamping block 7 disengages from the first through hole at the bottom of the main clamping member 4. At this time, the intermediate clamping block 7 is rotated and twisted so that the upper end of the intermediate clamping block 7 is stuck at the bottom of the main clamping member 4. At this time, the airtightness detection fixture is attachedFigure 3 The state shown;

[0036] Secondly, the user holds the whole airtightness detection fixture, and fixedly clamps the upper end of the main clamping member 4 to the outside of the explosion-proof valve 1. At this time, the upper end of the connection contact 501 contacts and abuts against the air-permeable film 3 on the explosion-proof valve 1 to form a partial seal, and the second through hole 5011 on the connection contact 501 communicates with the air-permeable film 3, thus completing the sealed connection between the airtightness detection fixture and the explosion-proof valve 1. Finally, the gas input port 602 on one side of the gas input member 6 is communicated with the externally arranged airtightness detection instrument;

[0037] Finally, the externally arranged airtightness detection instrument sends gas to the gas input port 602 through the air delivery pipe. The gas flows from the gas input port 602 to the gas delivery through hole 601 inside the gas input member 6, then flows from the gas delivery through hole 601 to the fourth through hole 5021 inside the intermediate connecting rod 502. Subsequently, the gas flows from the fourth through hole 5021 to the second through hole 5011 inside the connection contact 501. Finally, the gas flows from the second through hole 5011 through the air-permeable film 3 into the explosion-proof valve 1 and then into the power battery 2. The user can perform airtightness detection on the power battery 2 through the airtightness detection instrument.

[0038] The above has made a detailed description of the present utility model. The above description is only a preferred embodiment of the present utility model, and the scope of implementation of the present utility model cannot be limited. That is, all equal changes and modifications made according to the scope of this application should still fall within the scope covered by the present utility model.

Claims

1. An airtightness detection fixture for an explosion-proof valve of a power battery of a new energy vehicle, including a power battery installed with an explosion-proof valve, characterized in that, The airtightness detection fixture includes a main clamping member and a connecting component. One end of the main clamping member is movably clamped to the outside of the explosion-proof valve. One end of the connecting component passes through the inside of the main clamping member and is connected to the explosion-proof valve. The other end of the connecting component is connected with a gas input member, and the connecting component is connected to an airtightness detection instrument arranged outside through the gas input member.

2. The airtightness detection fixture for the explosion-proof valve of the power battery of a new energy vehicle according to claim 1, characterized in that, The connecting component includes a connecting contact, an intermediate connecting rod, and a compression spring. One end of the connecting contact is connected to the explosion-proof valve, and the other end of the connecting contact is connected to one end of the intermediate connecting rod. The other end of the intermediate connecting rod is connected to the gas input member. The intermediate connecting rod movably passes through the inside of the main clamping member. The compression spring is sleeved on the rod body of the intermediate connecting rod. One end of the compression spring is in contact and abuts against the connecting contact, and the other end of the compression spring is in contact and abuts against the inner side of the main clamping member.

3. The airtightness detection fixture for the explosion-proof valve of a new energy vehicle power battery according to claim 1, characterized in that, A first through hole is formed at the bottom of the main clamping member. A rotatable intermediate block is sleeved on the rod body of the intermediate connecting rod of the connecting component. The intermediate connecting rod of the connecting component passes through the inside of the main clamping member through the first through hole, and one end of the intermediate block is movably clamped inside the first through hole.

4. The airtightness detection fixture for the explosion-proof valve of a new energy vehicle power battery according to claim 2, characterized in that, The connecting contact is provided with a second through hole and a third through hole. The second through hole is arranged above the third through hole and is connected to it. The intermediate connecting rod is provided with a fourth through hole. The upper end of the intermediate connecting rod is inserted into the inside of the third through hole, and the fourth through hole is connected to the second through hole.

5. The airtightness detection fixture for an explosion-proof valve of a new energy vehicle power battery according to claim 2, characterized in that, A hand-held fixing member is fixedly sleeved on the rod body of the intermediate connecting rod. A connecting bolt is clamped between the hand-held fixing member and the gas input member. The hand-held fixing member is provided with a fifth through hole, and the gas input member is provided with a gas transmission through hole. The lower end of the intermediate connecting rod passes through the fifth through hole and the connecting bolt in sequence and is connected to the gas input member. The fourth through hole of the intermediate connecting rod is connected to the gas transmission through hole.

6. The airtightness detection fixture for the explosion-proof valve of a new energy vehicle power battery according to claim 1, characterized in that A gas input port is arranged on one side of the gas input member. The gas input member is connected to an airtightness detection instrument arranged outside through the gas input port.

7. The airtightness detection fixture for the explosion-proof valve of a new energy vehicle power battery according to claim 2, characterized in that, The explosion-proof valve is provided with a breathable film, and the second through hole of the connecting contact is connected to the breathable film.

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