Cylindrical battery airtightness testing machine

Abstract

The utility model relates to the technical field of battery detection, in particular to a cylindrical battery airtightness testing machine which comprises a case, the case is provided with an operation space, a lifting driver is arranged on the top wall of the operation space, a carrier is arranged on the bottom wall of the operation space, and a sleeve cover is arranged at the lifting end of the lifting driver. When the carrier is covered with the sleeve cover, an air tightness detection space is formed between the sleeve cover and the carrier, a controller and an air tightness detection mechanism are arranged on the top of the machine box, the air tightness detection mechanism comprises a vacuumizer, an air extraction valve, a small air leakage pressure sensor, a separation valve and a large air leakage pressure sensor, and the vacuumizer is communicated with an inner cavity of the sleeve cover through the air extraction valve. Two ends of the small leakage pressure sensor are respectively communicated with an inner cavity of the sleeve cover and one end of the separating valve, the other end of the separating valve is communicated with an air cavity of the sleeve cover, and two ends of the large leakage pressure sensor are respectively communicated with the sleeve cover and external air. The air tightness detection device is simple in structure, can detect the air tightness of the battery, and can judge the air leakage degree of the battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery detection technical field especially is a kind of cylindrical battery air tightness testing machine. BACKGROUND

[0002] If the air tightness of cylindrical battery is insufficient, electrolyte leakage can cause short circuit, fire or even explosion. With the increasing demand for high energy density batteries in new energy vehicles and energy storage systems, air tightness has become a key indicator directly affecting battery life and stability. In the prior art, a Chinese patent document with application number 202222873983.2 discloses a simple device for detecting the air tightness of cylindrical battery cells, comprising a nitrogen cavity. One end of the nitrogen cavity is fixedly installed with an air inlet valve. The other end of the nitrogen cavity, away from the air inlet valve, is fixedly installed with an air outlet valve. A locking screw is fixedly installed on one side of the top end of the nitrogen cavity. A gas pressure gauge is fixedly installed on the side of the top end of the nitrogen cavity, away from the locking screw. A test battery cell is arranged inside the locking screw. A battery cell pressing block is arranged at the top end of the test battery cell. A locking nut is sleeved on the surface of the locking screw. A current line is fixedly installed at the top end of the test battery cell. A gas pressure alarm is fixedly installed at one end of the current line. The patent document detects the air tightness of the battery cell by exploding the battery cell, which damages the battery cell and causes waste of resources. Moreover, the explosion method has safety hazards.

[0003] Therefore, the defect is obvious, and a solution is urgently needed. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the utility model aims to provide a cylindrical battery air tightness testing machine.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A cylindrical battery air tightness testing machine comprises a cabinet. The cabinet is provided with an operating space. A lifting drive is arranged on the top wall of the operating space. A carrier is arranged on the bottom wall of the operating space. A cover is arranged on the lifting end of the lifting drive. The cover is arranged above the carrier in a lifting manner. When the cover covers the carrier, an air tightness detection space is formed between the cover and the carrier. A controller and an air tightness detection mechanism electrically connected to the controller are arranged on the top of the cabinet. The lifting drive is electrically connected to the controller. The air tightness detection mechanism comprises a vacuum pump, an air extraction valve, a small air leakage pressure sensor, a partition valve and a large air leakage pressure sensor. The vacuum pump is arranged in the cabinet. The vacuum pump is communicated with the inner cavity of the cover via the air extraction valve. One end of the small air leakage pressure sensor is communicated with the inner cavity of the cover. The other end of the small air leakage pressure sensor is communicated with one end of the partition valve. The other end of the partition valve is communicated with the air cavity of the cover. One end of the large air leakage pressure sensor is communicated with the air cavity of the cover. The other end of the large air leakage pressure sensor is communicated with the outside air.

[0007] Further, the vacuum extractor is communicated with the air extraction valve through the regulating valve.

[0008] Further, safety grating is arranged on both sides of the open end of the operation space and is electrically connected with the controller.

[0009] Further, the inner cavity of the cover is communicated with the air pressure display meter, and the air pressure display meter is electrically connected with the controller.

[0010] Further, the top surface of the carrier is concavely provided with a plug-in hole, the plug-in hole is used for being communicated with the inner cavity of the cover, and the plug-in hole and the inner cavity of the cover surround to form the air tightness detection space.

[0011] Further, the bottom end surface of the cover and / or the top surface of the carrier is provided with a sealing structure, the sealing structure is arranged around the plug-in hole, and the sealing structure is used for sealing the gap between the cover and the carrier.

[0012] Further, the sealing structure comprises a sealing groove and a sealing ring embedded in the sealing groove, and the sealing groove is concavely arranged on the bottom end surface of the cover and / or the top surface of the carrier.

[0013] The utility model discloses beneficial effects: in practical application, the cylindrical battery is placed on the carrier, then the cover is driven to move close to the carrier by the lifting driver, until the cover is sleeved on the battery and covers on the carrier, so that the battery is located in the air tightness detection space, then the air tightness detection space is vacuumized through the air extraction valve, and the small air leakage pressure sensor detects the air pressure in the air tightness detection space in real time, when the vacuumizing time of the vacuum extractor reaches the preset time value (for example: 3 seconds), the vacuum extractor is closed, and the large air leakage pressure sensor detects the air pressure in the air tightness detection space, when in this time, the air pressure value detected by the large air leakage pressure sensor does not reach the preset air pressure value, it proves that the air tightness of the battery is unqualified, and the air leakage degree of the battery is large (the air leakage of the battery is serious), when in this time, the air pressure value detected by the large air leakage pressure sensor reaches the preset air pressure value, the partition valve is closed, so that one end air pressure of the small air leakage pressure sensor is fixed, and the other end of the small air leakage pressure sensor detects the air pressure in the air tightness detection space, and the small air leakage pressure sensor compares the two air pressure values in the preset time, when the two air pressure values are equal, it proves that the air tightness of the battery is qualified, when the two air pressure values are not equal, it proves that the air tightness of the battery is unqualified, and the air leakage degree of the battery is small (the air leakage of the battery is slight), after the air tightness detection is finished, the cover is lifted by the lifting driver, so that the cover is opened relative to the carrier, at this moment, the tested battery can be taken away, and the battery to be tested is placed on the carrier. ACCURACY

[0014] Figure 1The utility model discloses a three -dimensional structure schematic drawing.

[0015] Figure 2 The utility model discloses an internal structure schematic drawing.

[0016] Mark explanation:

[0017] 1, case, 2, operating space, 3, lifting driver, 4, carrier, 5, cover, 6, controller, 7, vacuum pump, 8, air extraction valve, 9, small air leakage pressure sensor, 10, partition valve, 11, big air leakage pressure sensor, 12, regulating valve, 13, safety grating, 14, plug-in hole, 15, sealing structure, 16, sealing groove, 17, sealing ring, 18, cylindrical battery. Specific implementation

[0018] In order to facilitate the understanding of those 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.

[0019] As Figure 1 And Figure 2 The utility model provides a cylindrical battery airtight test machine, it includes case 1, and case 1 is provided with operating space 2, and the top wall of operating space 2 is equipped with lifting driver 3, and the bottom wall of operating space 2 is equipped with carrier 4, and the lifting end of lifting driver 3 is equipped with cover 5, and cover 5 is lifted and is arranged in the upper of carrier 4, when cover 5 covers carrier 4, the airtight detection space is formed between cover 5 and carrier 4, and the top of case 1 is equipped with controller 6 and the airtight detection mechanism of air-tightness detection mechanism electric connection of controller 6, and lifting driver 3 is electrically connected with controller 6, and the airtight detection mechanism includes vacuum pump 7, air extraction valve 8, small air leakage pressure sensor 9, partition valve 10 and big air leakage pressure sensor 11, and vacuum pump 7 is equipped with case 1, and vacuum pump 7 is communicated with the inner chamber of cover 5 via air extraction valve 8, and one end of small air leakage pressure sensor 9 is communicated with the inner chamber of cover 5, and the other end of small air leakage pressure sensor 9 is communicated with one end of partition valve 10, and the other end of partition valve 10 is communicated with the air cavity of cover 5, and one end of big air leakage pressure sensor 11 is communicated with the air cavity of cover 5, and the other end of big air leakage pressure sensor 11 is communicated with the outside air, specifically, lifting driver 3 can adopt air cylinder, and controller 6 is used to control the airtight detection of lifting driver 3 and other components of the machine, and partition valve 10 is normally open.

[0020] In actual application, the cylindrical battery 18 is placed on the carrier 4, then the lifting driver 3 drives the cover 5 to move close to the carrier 4 until the cover 5 is sleeved on the battery and covers the carrier 4, so that the battery is located in the airtight detection space, then the vacuumizer 7 vacuums the airtight detection space through the air exhaust valve 8, the small air leakage pressure sensor 9 detects the air pressure in the airtight detection space in real time, when the vacuumizing time of the vacuumizer 7 reaches a preset time value (for example, 3 seconds), the vacuumizer 7 is closed, the large air leakage pressure sensor 11 detects the air pressure in the airtight detection space, when the air pressure value detected by the large air leakage pressure sensor 11 does not reach a preset air pressure value within the time, it is proved that the airtightness of the battery is unqualified, and the air leakage degree of the battery is large (the air leakage of the battery is serious), when the air pressure value detected by the large air leakage pressure sensor 11 reaches the preset air pressure value within the time, the separation valve 10 is closed, so that one end of the small air leakage pressure sensor 9 is fixed in size, and the other end of the small air leakage pressure sensor 9 detects the air pressure in the airtight detection space, the small air leakage pressure sensor 9 compares the two air pressure values within the preset time, when the two air pressure values are equal, it is proved that the airtightness of the battery is qualified, when the two air pressure values are not equal, it is proved that the airtightness of the battery is unqualified, and the air leakage degree of the battery is small (the air leakage of the battery is slight), after the airtightness detection is completed, the lifting driver 3 drives the cover 5 to rise, so that the cover 5 is opened relative to the carrier 4, at this time, the tested battery can be taken away, and the battery to be tested is placed on the carrier 4. The utility model has the advantages of simple structure, which can not only detect the airtightness of the battery, but also judge the air leakage degree of the battery.

[0021] In the embodiment, the vacuumizer 7 is communicated with the air exhaust valve 8 through the regulating valve 12. The regulating valve 12 can adjust the air exhaust amount of the vacuumizer 7 to the airtight detection space.

[0022] In the embodiment, the opening ends of the operation space 2 are provided with safety grating 13, and the safety grating 13 is electrically connected with the controller 6. The safety grating 13 is used for detecting external structures (such as hands, etc.), and the machine cannot work when the safety grating 13 detects external structures, and the machine can work normally when the safety grating 13 cannot detect external structures, thereby improving the use safety of the machine.

[0023] In the embodiment, the inner cavity of the cover 5 is communicated with an air pressure display table, and the air pressure display table is electrically connected with the controller 6. The air pressure display table is used for displaying the real-time air pressure of the airtight detection space.

[0024] In the embodiment, the top surface of the carrier 4 is concave with the insertion hole 14, which is used for communicating with the inner cavity of the cover 5, and the insertion hole 14 and the inner cavity of the cover 5 surround the airtight detection space. In actual application, when the cover 5 is opened with the carrier 4, the operator inserts the cylindrical battery 18 into the insertion hole 14, and the insertion hole 14 plays a role of positioning the cylindrical battery 18, thereby improving the position accuracy and stability of the cylindrical battery 18.

[0025] In the embodiment, the bottom end surface of the cover 5 and / or the top surface of the carrier 4 is provided with the sealing structure 15, which is arranged around the insertion hole 14 and is used for sealing the gap between the cover 5 and the carrier 4. Specifically, the sealing structure 15 includes the sealing groove 16 and the sealing ring 17 embedded in the sealing groove 16, and the sealing groove 16 is concave in the bottom end surface of the cover 5 and / or the top surface of the carrier 4. After the cover 5 covers the carrier 4, the sealing structure 15 seals the gap between the cover 5 and the carrier 4, thereby preventing the gap between the cover 5 and the carrier 4 from leaking air and affecting the accuracy of the airtightness detection of the cylindrical battery 18.

[0026] All the technical features in the embodiment can be freely combined according to actual needs.

[0027] The above embodiment is a preferred implementation scheme of the present application, and the present application can also be implemented in other ways without departing from the concept of the present application. Any obvious replacement without departing from the concept of the present application is within the protection scope of the present application.

Claims

1. A cylindrical battery airtightness testing machine, characterized in that: The system includes a chassis (1), an operating space (2), a lifting drive (3) on the top wall of the operating space (2), a carrier (4) on the bottom wall of the operating space (2), a cover (5) on the lifting end of the lifting drive (3), and the cover (5) is lifted and positioned above the carrier (4). When the cover (5) closes the carrier (4), an airtightness testing space is formed between the cover (5) and the carrier (4). A controller (6) and an airtightness testing mechanism electrically connected to the controller (6) are installed on the top of the chassis (1). The lifting drive (3) is electrically connected to the controller (6). The airtightness testing mechanism includes a vacuum pump. (7), vacuum valve (8), small leakage pressure sensor (9), separation valve (10) and large leakage pressure sensor (11), vacuum pump (7) is installed in the chassis (1), vacuum pump (7) is connected to the inner cavity of cover (5) through vacuum valve (8), one end of small leakage pressure sensor (9) is connected to the inner cavity of cover (5), the other end of small leakage pressure sensor (9) is connected to one end of separation valve (10), the other end of separation valve (10) is connected to the air cavity of cover (5), one end of large leakage pressure sensor (11) is connected to the air cavity of cover (5), and the other end of large leakage pressure sensor (11) is connected to the outside air.

2. The cylindrical battery airtightness testing machine according to claim 1, characterized in that: The vacuum pump (7) is connected to the air extraction valve (8) via the regulating valve (12).

3. The cylindrical battery airtightness testing machine according to claim 1, characterized in that: Safety light curtains (13) are installed on both sides of the opening end of the operating space (2), and the safety light curtains (13) are electrically connected to the controller (6).

4. The cylindrical battery airtightness testing machine according to claim 1, characterized in that: The inner cavity of the cover (5) is connected to a pressure gauge, which is electrically connected to the controller (6).

5. The cylindrical battery airtightness testing machine according to claim 1, characterized in that: The top surface of the carrier (4) is recessed with an insertion hole (14), which is used to communicate with the inner cavity of the cover (5). The insertion hole (14) and the inner cavity of the cover (5) form an airtight testing space.

6. The cylindrical battery airtightness testing machine according to claim 5, characterized in that: A sealing structure (15) is provided on the bottom end face of the cover (5) and / or the top surface of the carrier (4). The sealing structure (15) is provided around the insertion hole (14) and is used to seal the gap between the cover (5) and the carrier (4).

7. A cylindrical battery airtightness testing machine according to claim 6, characterized in that: The sealing structure (15) includes a sealing groove (16) and a sealing ring (17) fitted into the sealing groove (16). The sealing groove (16) is recessed into the bottom end face of the cover (5) and / or the top face of the carrier (4).

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