Air tightness testing machine for explosion-proof valve of battery pack

Abstract

The utility model relates to the technical field of air tightness testing machines, in particular to a battery pack explosion-proof valve air tightness testing machine which comprises a base, an air tightness detector, an electric cabinet, a frame, a lower die, an upper die and a lifting driving mechanism arranged at the top of the frame, the lifting end of the lifting driving mechanism is in driving connection with the upper die, and the bottom face of the upper die is provided with an upper cavity in an upward concave mode. The top surface of the lower die is concavely provided with a placement cavity and an air tightness detection hole positioned on one side of the placement cavity, the side wall of the lower die is concavely provided with an air tightness detection air passage communicated with the air tightness detection hole, an inner sealing ring is embedded in the edge of the bottom wall of the placement cavity, the bottom wall of the placement cavity is provided with an air leakage passage, and the air tightness detection air passage is communicated with an air tightness detector through an air pipe; when the upper die and the lower die are combined, the upper die and the lower die are connected in a sealing mode through a sealing structure, the containing cavity is located in the upper cavity, and the airtightness detection hole is communicated with the upper cavity. The air tightness detection device is simple in structure, simple in operation process of air tightness detection of the explosion-proof valve of the battery pack, and high in air tightness detection efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to airtightness testing machine technical field especially is a kind of battery pack explosion relief valve airtightness testing machine. BACKGROUND

[0002] Battery pack explosion relief valve is a safety device, mainly used to prevent battery pack from exploding due to internal pressure being too high under abnormal conditions. Battery pack explosion relief valve ensures safe operation of battery under abnormal conditions through pressure release and automatic closing mechanism, and is widely used in electric vehicles, energy storage systems and consumer electronics, etc. It is an important guarantee for battery safety.

[0003] Battery pack explosion relief valve airtightness detection is an important link to ensure battery safety, to ensure that explosion relief valve can normally open under set pressure, and keep sealed under non-working state to prevent gas leakage. Battery pack explosion relief valve airtightness detection method mainly includes air pressure detection, water immersion detection and nitrogen leak detection. Among them, for air pressure detection method, the existing patent with application number 202223332700.X discloses an aluminum shell explosion relief valve airtightness detection device, including upper die and lower die, the upper end of the upper die is connected with push rod, the inside of the upper die is provided with cover body, the lower end of the cover body is provided with first sealing sheet, the lower end of the first sealing sheet is provided with protrusion. When sampling detection, the detector needs to drill a hole on the outer edge of the explosion relief valve to be detected (the inner diameter size of the hole is the same as the inner diameter size of the groove), and when detecting, the explosion relief valve to be detected after drilling is placed in the inside of the groove, the hole is aligned with the groove, the device is started, the push rod moves downward with the upper die, the protrusion slowly moves downward, the protrusion is inserted into the inside of the groove, the first sealing sheet and the second sealing sheet are tightly attached, then the operator adjusts the threshold value of pressure gauge, and the air pump fills air into the inside of the explosion relief valve in the groove. Since drilling is needed on the explosion relief valve to be detected before detection, the operation process of airtightness detection is increased, which makes airtightness detection troublesome and inefficient.

[0004] Therefore, the defect is very obvious, and a solution needs to be provided. UTILITY MODEL CONTENT

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a battery pack explosion relief valve airtightness testing machine.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The application discloses a battery pack explosion-proof valve air tightness testing machine, which comprises a base, an air tightness detector arranged on the base, an electric control box arranged on the base, a frame arranged on the electric control box, a lower die arranged on the bottom of the frame, an upper die arranged above the lower die and used for being closed with the lower die, and a lifting driving mechanism arranged on the top of the frame, wherein the lifting end of the lifting driving mechanism is in driving connection with the upper die, the bottom surface of the upper die is concave upward to form an upper cavity, the top surface of the lower die is concave to form a placing cavity and an air tightness detection hole located on one side of the placing cavity, the side wall of the lower die is concave to form an air tightness detection air channel communicated with the air tightness detection hole, the bottom wall edge of the placing cavity is embedded with an inner sealing ring, the bottom wall of the placing cavity is provided with a gas leakage channel, and the air tightness detection air channel is communicated with the air tightness detector through an air pipe; when the upper die is closed with the lower die, the upper die and the lower die are sealed and connected through a sealing structure, the placing cavity is located in the upper cavity, and the air tightness detection hole is communicated with the upper cavity.

[0008] Further, the sealing structure comprises an outer sealing ring embedded on the bottom surface of the upper die or / and the top surface of the lower die; when the upper die is closed with the lower die, the outer sealing ring is arranged around the upper cavity, and the air tightness detection hole and the placing cavity are located in the outer sealing ring.

[0009] Further, a guide rod is arranged in the frame, a guide sleeve is slidably arranged on the outer side of the guide rod, and the guide sleeve is arranged on the upper die.

[0010] Further, a safety grating is arranged on the front side of the frame.

[0011] Further, the lifting driving mechanism and the safety grating are electrically connected with the electric control box, the electric control box is provided with an emergency stop button and two synchronous buttons.

[0012] Further, the number of the upper cavities and the number of the placing cavities are both plural, and the plural upper cavities are arranged in one-to-one correspondence with the plural placing cavities.

[0013] The utility model discloses beneficial effect: in practical application, the battery pack explosion -proof valve is placed in the placing cavity, and the battery pack explosion -proof valve is in close contact with the inner sealing ring, to seal the gap between the outside wall of battery pack explosion -proof valve and the inner wall of placing cavity, and form sealed space, then the control box control lift drive mechanism drives the upper die to drop, until the upper die and the lower die are closed, the gap between the upper die and the lower die is sealed through the sealing structure, and the placing cavity is located in the upper cavity, and the airtight detection hole is communicated with the upper cavity, and the inner wall of the upper cavity is pressed to the battery explosion -proof valve, and the airtightness detector carries out the airtight detection to the sealed space formed by the upper die and the lower die through the air pipe, the airtight detection gas path and the airtight detection hole, and the air pump in the airtightness detector carries out the inflation to the sealed space and keeps pressure for a period of time, when the actual air pressure value displayed by the airtightness detector is not equal to the preset air pressure value, prove that the air leakage channel is communicated with the sealed space through the battery pack explosion -proof valve, and the air leakage phenomenon appears, then prove that the diaphragm of battery pack explosion -proof valve breaks, when the actual air pressure value displayed by the airtightness detector is equal to the preset air pressure value, prove that the air leakage channel is not communicated with the sealed space, then prove that the diaphragm of battery pack explosion -proof valve does not break, the utility model discloses simple structure, and the operation flow of the airtightness detection of battery pack explosion -proof valve is simple, and the airtightness detection efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the three -dimensional structure schematic diagram of the utility model.

[0015] Fig. 2 It is the section view of the utility model behind hiding base, airtightness detector and control box.

[0016] Fig. 3 It is the section view of the utility model behind hiding base, airtightness detector, lift drive mechanism and control box of another visual angle.

[0017] Fig. 4 It is the three -dimensional structure schematic diagram of the utility model's lower die and sealing structure.

[0018] Mark explanation:

[0019] 1, base, 2, airtightness detector, 3, control box, 4, frame, 5, lower die, 6, upper die, 7, lift drive mechanism, 8, upper cavity, 9, placing cavity, 10, airtight detection hole, 11, airtight detection gas path, 12, inner sealing ring, 13, air leakage channel, 14, guide rod, 15, guide sleeve, 16, safety grating, 17, emergency stop button, 18, synchronization button, 19, battery pack explosion -proof valve, 20, sealing structure. Specific implementation

[0020] In order to facilitate the understanding of the person skilled in the art, the utility model is further explained below in conjunction with examples and drawings, and the content mentioned in the implementation is not the limitation of the utility model.

[0021] As Figs. 1 to 4 shown, the utility model provides a kind of battery pack explosion valve air tightness testing machine, it includes base 1, air tightness detector 2 of being equipped in base 1, electric cabinet 3 of being equipped in base 1, frame 4 of being equipped in electric cabinet 3, lower mould 5 of being equipped in the bottom of frame 4, upper mould 6 of being arranged in the upper of lower mould 5 and being used to with lower mould 5 and the upper die of closing, and the lifting drive mechanism 7 of being equipped in the top of frame 4, the lifting end of lifting drive mechanism 7 is driven to be connected with upper mould 6, the bottom surface of upper mould 6 is concave to upper cavity 8 upwards, the top surface of lower mould 5 is concave to place cavity 9 and the air tightness detection hole 10 located at one side of place cavity 9, the side wall of lower mould 5 is concave to the air tightness detection gas channel 11 being communicated with air tightness detection hole 10, the bottom wall edge of place cavity 9 is embedded with inner sealing ring 12, the bottom wall of place cavity 9 is provided with gas leakage channel 13, air tightness detection gas channel 11 is communicated with air tightness detector 2 via air pipe, upper cavity 8 and place cavity 9 are coaxially arranged, the inner diameter of upper cavity 8 is greater than the inner diameter of place cavity 9;When upper mould 6 and lower mould 5 close, upper mould 6 and lower mould 5 are sealed and connected via sealing structure 20, place cavity 9 is located in upper cavity 8, air tightness detection hole 10 is communicated with upper cavity 8.

[0022] In practical application, battery pack explosion valve 19 is placed in place cavity 9, battery pack explosion valve 19 is in close contact with inner sealing ring 12, to seal the gap between the outer lateral wall of battery pack explosion valve 19 and the inner wall of place cavity 9, and form sealed space, then electric cabinet 3 controls lifting drive mechanism 7 to drive upper mould 6 to descend, until upper mould 6 and lower mould 5 close, at this time, the gap between upper mould 6 and lower mould 5 is sealed via sealing structure 20, place cavity 9 is located in upper cavity 8, air tightness detection hole 10 is communicated with upper cavity 8, the inner wall of upper cavity 8 is pressed tightly battery explosion valve, air tightness detector 2 is communicated with upper mould 6 and lower mould 5 via air pipe, air tightness detection gas channel 11 and air tightness detection hole 10, and the sealed space formed by air tightness detector 2 is inflated and pressure is maintained for a period of time, when the actual air pressure value displayed by air tightness detector 2 is not equal to the preset air pressure value, it proves that gas leakage channel 13 is communicated with sealed space via battery pack explosion valve 19, and the phenomenon of gas leakage appears, then it proves that diaphragm of battery pack explosion valve 19 is broken;When the actual air pressure value displayed by air tightness detector 2 is equal to the preset air pressure value, it proves that gas leakage channel 13 is not communicated with sealed space, then it proves that diaphragm of battery pack explosion valve 19 is not broken.The structure of the utility model is simple, the operation process of air tightness detection of battery pack explosion valve 19 is simple, and the air tightness detection efficiency is high.

[0023] In the embodiment, the sealing structure 20 comprises an outer sealing ring embedded in the bottom surface of the upper die 6 and / or the top surface of the lower die 5; when the upper die 6 and the lower die 5 are closed, the outer sealing ring is arranged around the upper cavity 8, and the air tightness detection hole 10 and the placement cavity 9 are located in the outer sealing ring. In actual application, when the upper die 6 and the lower die 5 are closed, the outer sealing ring seals the gap between the bottom surface of the upper die 6 and the top surface of the lower die 5, so that a sealed space is formed between the upper die 6 and the lower die 5.

[0024] In the embodiment, the frame 4 is provided with a guide rod 14, the guide rod 14 is slidably sleeved with a guide sleeve 15, and the guide sleeve 15 is arranged on the upper die 6. In the process of lifting the upper die 6, the guide sleeve 15 and the guide rod 14 are in sliding fit, so that the lifting stability of the upper die 6 is improved.

[0025] In the embodiment, the front side of the frame 4 is provided with a safety grating 16. When the safety grating 16 detects foreign matter, the machine cannot perform detection action, and the safety performance in use is improved.

[0026] In the embodiment, the lifting driving mechanism 7 and the safety grating 16 are electrically connected with the electric control box 3, the electric control box 3 is provided with an emergency stop button 17 and two synchronous buttons 18. In actual application, after the operator places the battery pack explosion-proof valve 19 in the placement cavity 9, the operator simultaneously presses the two synchronous buttons 18 with both hands, and only when the two synchronous buttons 18 are simultaneously pressed, the machine can perform detection action, and the safety performance in use is further improved.

[0027] In the embodiment, the number of the upper cavities 8 and the number of the placement cavities 9 are both multiple, and the multiple upper cavities 8 are arranged in one-to-one correspondence with the multiple placement cavities 9. The structure design increases the number of one-time detection battery pack explosion-proof valves 19, and further improves the efficiency of air tightness detection of the battery pack explosion-proof valve 19.

[0028] All the technical features in the embodiment can be freely combined according to actual needs.

[0029] The above embodiment is a preferred implementation scheme of the utility model, in addition to this, the utility model can be realized in other ways, and any obvious replacement without departing from the technical scheme concept is within the protection scope of the utility model.

Claims

1. A battery pack explosion-proof valve airtightness tester, characterized in that: The utility model provides a kind of air-tightness detector, including base (1), air-tightness detector (2) installed on base (1), electric cabinet (3) installed on base (1), frame (4) installed on electric cabinet (3), lower die (5) installed on the bottom of frame (4), upper die (6) is arranged above lower die (5) and is used to be closed with lower die (5) and lifting drive mechanism (7) installed on the top of frame (4), the lifting end of lifting drive mechanism (7) is driven connection with upper die (6), the bottom surface of upper die (6) is concave with upper cavity (8) upwards, the top surface of lower die (5) is concave with placement cavity (9) and air-tightness detection hole (10) located at the side of placement cavity (9), the side wall of lower die (5) is concave with air-tightness detection air channel (11) communicated with air-tightness detection hole (10), the bottom wall edge of placement cavity (9) is embedded with inner sealing ring (12), the bottom wall of placement cavity (9) is provided with air leakage channel (13), air-tightness detection air channel (11) is communicated with air-tightness detector (2) via air pipe;When upper die (6) and lower die (5) are closed, upper die (6) and lower die (5) are sealed connection via sealing structure (20), placement cavity (9) is located in upper cavity (8), air-tightness detection hole (10) is communicated with upper cavity (8).

2. The battery pack explosion relief valve airtightness test machine according to claim 1, characterized in that: Sealing structure (20) includes outer sealing ring embedded in the bottom surface of upper die (6) or / and the top surface of lower die (5);When upper die (6) and lower die (5) are closed, outer sealing ring is arranged around upper cavity (8), air-tightness detection hole (10) and placement cavity (9) are located in outer sealing ring.

3. The battery pack explosion relief valve airtightness test machine according to claim 1, characterized in that: Frame (4) is provided with guide rod (14) inside, guide rod (14) is provided with guide sleeve (15) outside sliding, guide sleeve (15) is installed on upper die (6).

4. The battery pack explosion relief valve airtightness test machine of claim 1, wherein: The front side of frame (4) is provided with safety grating (16).

5. The battery pack explosion relief valve airtightness test machine according to claim 4, characterized in that: Lifting drive mechanism (7) and safety grating (16) are electrically connected with electric cabinet (3), and electric cabinet (3) is provided with emergency stop button (17) and two synchronization buttons (18).

6. The battery pack explosion relief valve airtightness test machine according to claim 1, characterized in that: The number of upper cavities (8) and the number of placement cavities (9) are multiple, and multiple upper cavities (8) are one-to-one corresponding with multiple placement cavities (9).

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