Battery box water cooling plate air tightness detection device based on differential pressure

Abstract

The utility model discloses a differential pressure-based air tightness detection device for a battery box water-cooling plate, and the device comprises a housing which is of a rectangular box structure and is used for limiting air tightness detection equipment; and the air inflation pump is mounted in the shell and is used for providing air inflation equipment for air tightness detection of the battery box water cooling plate. According to the differential pressure-based air tightness detection device for the battery box water-cooling plate, gas with the same pressure and capacity can be conveniently and synchronously injected into the standard-price battery box water-cooling plate and the detected battery box water-cooling plate through the Y-shaped structure of the butt joint pipe, and the internal pressure environment is kept the same as the internal pressure environment when the gas enters the battery box water-cooling plate; the detection ends on the two sides of the differential pressure sensor are in a balanced state, and when hole pressure relief occurs in the detected battery box water-cooling plate, the differential pressure sensor located in the detection box compares the air pressure value in the standard component, so that the air tightness detection operation of the detected battery box water-cooling plate is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy battery boxes, in particular to a battery box water cooling plate air tightness detection device based on differential pressure. Background Art

[0002] With the development and use of new energy vehicles, in order to ensure the stable and continuous operation of the power system of new energy vehicles, the power battery system needs to be cooled. The range of cooling methods available for existing power battery systems has been severely narrowed. Among the more mature cooling methods, air cooling has been basically excluded from the application scope of passenger car battery packs except for being used in conjunction with other heat transfer methods. In the existing power battery system, excess heat is generated during battery operation. The heat is transferred through the contact between the battery or module and the surface of the plate-type aluminum device, and is finally taken away by the coolant passing through the internal flow channel of the device to achieve cooling. The plate-type aluminum device is a water-cooled plate.

[0003] In the existing method of testing the air tightness of workpieces, the water-cooled plate to be tested is immersed in water, and whether bubbles are generated is observed to prove that the liquid cooling plate has leaks. This detection and processing method is prone to cause erroneous data due to bubbles generated by environmental changes and the movement of the water-cooled plate, thereby reducing the accuracy of the detection data. In addition, since the area of ​​the water-cooled plate of the automobile battery box is large, the overall floor space occupied by the external pressure detection equipment is increased when it is used, which increases the workload of the preparation operation for the air tightness detection. Utility Model Content

[0004] The purpose of the utility model is to provide a battery box water-cooling plate air-tightness detection device based on differential pressure, so as to solve the problem that the observation and detection operation of bubble generation by immersion proposed in the above-mentioned background technology is easy to cause erroneous detection data due to bubbles generated by environmental changes and movement of the water-cooling plate, thereby reducing the accuracy of the detection data, and since the area of ​​the water-cooling plate of the automobile battery box is relatively large, the overall footprint of the external pressure detection equipment is increased when it is used, thereby increasing the workload of the preparation operation for air-tightness detection.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a battery box water cooling plate air tightness detection device based on differential pressure, comprising a shell, which is arranged as a rectangular box structure, and the shell provides a limit for the air tightness detection device;

[0006] An air pump, which is installed inside the housing, and is used to provide an air-tightness test device for the battery box water cooling plate;

[0007] An interactive display screen is provided on one side of the shell, and the port of the interactive display screen passes through one side of the shell, an inspection door on one side of the shell is passed through by an access pipe, and the access pipe is connected to the inlet of the air pump, the output end of the air pump is connected to the docking pipe, and one side of the docking pipe is provided with

[0008] The differential pressure detection component is connected to the butt pipe to perform air tightness detection on the water cooling plate to be detected;

[0009] A controller is arranged inside the shell, the controller is connected to the interactive display screen through a cable, and the controller is connected to the component socket of the detection box through a cable, two pipe openings are symmetrically arranged inside the detection box, and the two pipe openings of the detection box are respectively connected to the detection tube and the standard tube.

[0010] The above technical solution is adopted to provide a corresponding airtightness detection environment for the water cooling plate of the automobile battery box.

[0011] Preferably, the bottom end of the shell is snap-connected to the top end of the support platform, and the support platform is provided with a rectangular platform structure, and an inspection door is connected to one side of the shell by bolts.

[0012] By adopting the above technical solution, the shell is supported by the support platform to provide assistance, which facilitates the operation of the device.

[0013] Preferably, the butt joint pipe is configured as a Y-shaped pipe structure, and the connecting end of the butt joint pipe and the air pump is a single pipe opening, and the other two ends of the butt joint pipe are respectively connected to the detection pipe and the standard pipe.

[0014] By adopting the above technical solution, along with the Y-shaped pipeline setting of the butt joint, it is convenient to realize the synchronous supply and inflation operation.

[0015] Preferably, the differential pressure detection assembly comprises:

[0016] A main valve is arranged in a single pipe opening of the butt-joint pipe, and the main valve is electrically connected to the controller;

[0017] A main pressure detector is installed in a single pipe opening of the butt-joint pipe, and the main pressure detector is electrically connected to the controller;

[0018] A differential pressure sensor is arranged between the two pipe openings of the detection box, and a detection end of the differential pressure sensor is located in the two pipe openings of the detection box, and the differential pressure sensor is electrically connected to the controller;

[0019] A sub-control valve 1 is installed in one port of the butt-joint pipe, and the sub-control valve 1 is electrically connected to the controller;

[0020] The second sub-control valve is installed in another port of the butt-joint pipe, and the second sub-control valve is electrically connected to the controller.

[0021] By adopting the above technical solution, the differential pressure detection component facilitates the detection and processing of the air pressure difference between the standard part and the part to be detected.

[0022] Preferably, the main pressure detector is arranged on one side of the main valve, and both the main valve and the main pressure detector are electrically connected to the controller.

[0023] By adopting the above technical solution, the main pressure detector performs preliminary detection of the air pressure value, which is convenient for numerical comparison processing.

[0024] Preferably, the butt-joint pipe pipe port connected to the sub-control valve 1 is connected to the standard pipe, the butt-joint pipe pipe port connected to the sub-control valve 2 is connected to the detection pipe, and the other ends of the detection pipe and the standard pipe are both connected to a butt-joint pipe.

[0025] By adopting the above technical solution, the same air pressure is input into the corresponding water-cooled plate detection equipment through the standard tube and the detection tube.

[0026] Preferably, a connector is provided at one end of the butt joint, and an outer wall surface of the connector is slidably connected to a limiting ring, and an inner wall surface of the limiting ring is provided with a slide rail.

[0027] By adopting the above technical solution, the butt-joint pipe is connected to the corresponding water-cooling plate through the connector, thereby avoiding errors in detection data caused by leakage.

[0028] Compared with the prior art, the utility model has the following beneficial effects: the battery box water cooling plate air tightness detection device based on differential pressure:

[0029] 1. When in use, the Y-shaped structure of the butt pipe facilitates the simultaneous injection of gas of equal pressure and capacity into the standard battery box water cooling plate and the tested battery box water cooling plate. The gas enters the battery box water cooling plate to maintain the same internal pressure environment, so that the two detection ends of the differential pressure sensor are in a balanced state. When a hole appears in the tested battery box water cooling plate to release pressure, the differential pressure sensor located inside the test box compares the air pressure value inside the standard part, thereby realizing the air tightness detection operation of the tested battery box water cooling plate;

[0030] 2. The air pump, main pressure detector and differential pressure sensor arranged inside the shell realize the air tightness detection of the battery box water cooling plate. Through the Y-shaped structure of the butt pipe, by inputting equal gas pressure, when a hole appears in the water cooling plate of the battery box being tested and the pressure is released, it is quickly identified by the differential pressure sensor for detection. The overall structure is compact, which is convenient for rapid air tightness detection of the car battery box water cooling plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the utility model;

[0032] Figure 2 This is a schematic diagram of the three-dimensional structure of the installation position of the interactive display screen and the support platform of the utility model;

[0033] Figure 3 This is a schematic diagram of the three-dimensional structure of the air pump and the butt-joint pipe of the utility model;

[0034] Figure 4 This is a schematic diagram of the overall internal three-dimensional structure of the utility model;

[0035] Figure 5 This is a schematic diagram of the overall internal three-dimensional structure of the utility model;

[0036] Figure 6 For this utility model Figure 5 A in the middle is an enlarged schematic diagram of the three-dimensional structure.

[0037] In the figure: 1. Shell; 2. Interactive display screen; 3. Support platform; 4. Access pipe; 5. Air pump; 6. Butt joint pipe 1; 7. Main valve; 8. Main pressure detector; 9. Controller; 10. Differential pressure sensor; 11. Detection box; 12. Sub-control valve 1; 13. Sub-control valve 2; 14. Detection tube; 15. Standard tube; 16. Butt joint pipe 2; 17. Connector; 18. Limit ring. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] See also Figure 1-6 The utility model provides a technical solution: a battery box water cooling plate air tightness detection device based on differential pressure, including a shell 1, an interactive display screen 2, a support platform 3, an access pipe 4, an air pump 5, a butt joint pipe 1 6, a main valve 7, a main pressure detector 8, a controller 9, a differential pressure sensor 10, a detection box 11, a sub-control valve 1 12, a sub-control valve 2 13, a detection tube 14, a standard tube 15, a butt joint pipe 2 16, a connector 17 and a limit ring 18;

[0040] Among them, the shell 1 is set as a rectangular box structure, the shell 1 provides a limit for the airtightness detection equipment, the bottom end of the shell 1 is snap-connected to the top of the support platform 3, and the support platform 3 is set with a rectangular platform structure, and one side of the shell 1 is connected with an inspection door by bolts;

[0041] An air pump 5, which is installed inside the housing 1, and is used to provide an air-tightness test device for the battery box water cooling plate;

[0042] An interactive display screen 2 is provided on one side of the shell 1, and the port of the interactive display screen 2 passes through one side of the shell 1. The inspection door on one side of the shell 1 is passed through by an access pipe 4, and the access pipe 4 is connected to the inlet of the air pump 5, and the output end of the air pump 5 is connected to the docking pipe 6, and a differential pressure detection component is provided on one side of the docking pipe 6, and the water-cooled plate to be tested is connected to the docking pipe 6 to perform air tightness detection. The docking pipe 6 is set as a Y-shaped pipeline structure, and the connection end of the docking pipe 6 and the air pump 5 is a single pipeline port, and the other two ends of the docking pipe 6 are respectively connected to the detection pipe 14 and the standard pipe 15;

[0043] The controller 9 is arranged inside the shell 1, and the controller 9 is connected to the interactive display screen 2 through a cable, and the controller 9 is connected to the component socket of the detection box 11 through a cable. Two pipe openings are symmetrically arranged inside the detection box 11, and the two pipe openings of the detection box 11 are respectively connected to the detection tube 14 and the standard tube 15.

[0044] In conjunction with the accompanying drawings Figure 1-6 As shown, the shell 1 has an inspection door on one side connected to the bolts, and the heat generated by the internal components is discharged through the opening on one side of the inspection door of the shell 1. The support platform 3 installed at the bottom of the shell 1 is used to support the shell 1 to reduce the heat generated by the work. The interactive display screen 2 is set on one side of the opening of the shell 1, as shown in FIG. Figure 1-2 As shown, the interactive display screen 2 is a display screen sold on the market, which is a pressure-sensitive touch interactive device. The interactive display screen 2 is connected to the controller 9, which is equipped with a BMP series chip for calculating and acquiring the acquired air pressure data. As the controller 9 transmits the data to the interactive display screen 2, the interactive display screen 2 quickly displays the corresponding air tightness detection air pressure data to the user. The detection tube 14 connected to the detection box 11 is connected to the water cooling plate of the automobile battery box to be detected, and the standard tube 15 is connected to the water cooling plate of the automobile battery box of the standard part. By Acquisition of air pressure data inside the water-cooling plate of the automobile battery box facilitates calculation of the air pressure data of the tested automobile battery box water-cooling plate, and quickly identifies the airtightness of the tested automobile battery box water-cooling plate. The access pipe 4 arranged on one side of the air pump 5 facilitates acquisition of external gas for supply into the air pump 5. The air pump 5 is a mature product sold on the market, and is used to plug the butt joint pipe 6 at the output end of the air pump 5 to fill gas, wherein the butt joint pipe 6 is a Y-shaped pipeline structure, which is convenient for inputting the same amount of gas and air pressure into the test tube 14 and the standard tube 15, and is convenient for airtightness detection.

[0045] The differential pressure detection components include:

[0046] A main valve 7 is arranged in a single pipe opening of a butt joint pipe 6, and the main valve 7 is electrically connected to a controller 9;

[0047] A main pressure detector 8 is installed in a single pipe opening of the butt pipe 1 6, the main pressure detector 8 is electrically connected to a controller 9, the main pressure detector 8 is arranged on one side of the main valve 7, and the main valve 7 and the main pressure detector 8 are both electrically connected to the controller 9;

[0048] A differential pressure sensor 10 is disposed between two pipe openings of the detection box 11, and a detection end of the differential pressure sensor 10 is located inside the two pipe openings of the detection box 11. The differential pressure sensor 10 is electrically connected to the controller 9;

[0049] A sub-control valve 12 is installed in a port of a butt joint pipe 6. The sub-control valve 12 is electrically connected to the controller 9. The butt joint pipe 6 port connected to the sub-control valve 12 is connected to the standard pipe 15. The butt joint pipe 6 port connected to the sub-control valve 13 is connected to the detection pipe 14. The other ends of the detection pipe 14 and the standard pipe 15 are both connected to a butt joint pipe 16. A connector 17 is provided at one end of the butt joint pipe 16. The outer wall surface of the connector 17 is slidably connected to a limit ring 18. The inner wall surface of the limit ring 18 is provided with a slide rail.

[0050] A second sub-control valve 13, which is installed in another port of the butt-joint pipe 6, and the second sub-control valve 13 is electrically connected to the controller 9;

[0051] In conjunction with the accompanying drawings Figure 1-6 As shown, the controller 9 controls the opening and closing of the main valve 7, the sub-control valve 1 12 and the sub-control valve 2 13 through the cable, and the controller 9 calculates the values ​​obtained by the main pressure detector 8 and the differential pressure sensor 10 and transmits them to the interactive display screen 2, wherein the main valve 7 is located in a single pipeline connected to the pipe 1 6, as shown in FIG. Figure 2-5As shown, it is convenient to control the collective supply of gas. The connector 17 at one end of the butt-joint pipe 16 of the detection tube 14 is connected to the battery box water-cooling plate to be detected, and the connector 17 at one end of the butt-joint pipe 16 of the standard tube 15 is connected to the battery box water-cooling plate of the standard part. The limit ring 18 sleeved on the outside of the connector 17 is pulled toward the connection after docking with the water-cooling plate pipeline to keep the connection sleeve sealed to avoid internal gas leakage. As the main valve 7, the sub-control valve 12 and the sub-control valve 2 13 are opened synchronously, the gas passes through the Y-shaped structure of the butt-joint pipe 16 and enters the battery box water-cooling plate of the standard part and the battery box water-cooling plate to be detected respectively. After inputting an equal amount of gas pressure, the differential pressure sensor 10 balances the air pressure data in the two pipelines of the detection box 11 , synchronously close the main valve 7, sub-control valve 1 12 and sub-control valve 2 13, the main pressure detector 8 detects the standard air pressure data between the main valve 7 and the sub-control valve 12 and the sub-control valve 2 13, and feeds back to the sensors on both sides of the differential pressure sensor 10, and detects the air pressure difference value between the battery box water cooling plate of the standard part and the battery box water cooling plate being tested after the sub-control valve 12 and the sub-control valve 2 13 are closed. After the leak port of the battery box water cooling plate being tested releases pressure, the air pressure value inside the battery box water cooling plate being tested drops rapidly, and the data on the detection ends of the differential pressure sensor 10 on both sides are unbalanced. As the data is uploaded, it is displayed on the interactive display screen 2, which is convenient for displaying the standard air pressure data and the values ​​inside the two battery box water cooling plates, so as to realize fast and accurate detection of the air tightness of the battery box water cooling plate.

[0052] Working principle: When using the battery box water cooling plate air tightness detection device based on differential pressure, it is connected to the outside air through the access pipe 4, so that the air pump 5 draws the outside air to charge the docking pipe 1 6 at the output end, and the docking pipe 16 and the connector 17 connected to the detection pipe 14 are connected to the port of the battery box water cooling plate to be detected, and the docking pipe 16 and the connector 17 connected to the standard pipe 15 are connected to the port of the battery box water cooling plate of the standard part. As the main valve 7 in the single pipeline inside the docking pipe 1 6 is opened and closed by the controller 9 controlled by the interactive display 2, the main pressure detector 8 is in the process of detecting the air pressure inside the docking pipe 6, and its detection data enters the controller 9 through the cable. As the controller 9 The data conversion is displayed on the interactive display screen 2. As the sub-control valve 12 and the sub-control valve 2 13 in the two ports at the output end of the docking tube 6 are opened synchronously, equal amounts of air pressure are injected into the battery box water cooling plate of the standard part and the battery box water cooling plate to be tested through the detection tube 14 and the standard tube 15 respectively. As the sub-control valve 12 and the sub-control valve 2 13 are closed synchronously, the detection ends located on both sides of the differential pressure sensor 10 calculate the differential pressure of the battery box water cooling plate of the standard part and the battery box water cooling plate to be tested. The acquired data is transmitted to the controller 9 through a cable, and is processed by the controller 9 and projected onto the interactive display screen 2, which is convenient for the detection personnel to observe and increases the overall practicality.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery box water cooling plate air tightness detection device based on differential pressure, comprising: The housing (1) is configured as a rectangular box structure, and the housing (1) provides a limit for the air tightness detection device; An air pump (5), which is installed inside the housing (1), and the air pump (5) is used to provide an air-tightness test device for the battery box water cooling plate; The invention is characterized in that: an interactive display screen (2) is provided on one side of the shell (1), and a port of the interactive display screen (2) passes through one side of the shell (1); an access pipe (4) passes through an inspection door on one side of the shell (1), and the access pipe (4) is connected to an inlet of an air pump (5); an output end of the air pump (5) is connected to a docking pipe (6), and a docking pipe (6) is provided on one side of the docking pipe (6). The differential pressure detection assembly is connected to the butt joint pipe 1 (6) to perform air tightness detection on the water cooling plate to be detected; A controller (9) is arranged inside the housing (1), the controller (9) is connected to the interactive display screen (2) via a cable, and the controller (9) is connected to the component socket of the detection box (11) via a cable, two pipe openings are symmetrically arranged inside the detection box (11), and the two pipe openings of the detection box (11) are respectively connected to the detection tube (14) and the standard tube (15).

2. The battery box water cooling plate air tightness detection device based on differential pressure according to claim 1, characterized in that: The bottom end of the shell (1) is snap-connected to the top end of the support platform (3), and the support platform (3) is provided with a rectangular platform structure. One side of the shell (1) is connected with an inspection door via bolts.

3. The battery box water cooling plate air tightness detection device based on differential pressure according to claim 1, characterized in that: The butt-joint pipe (6) is configured as a Y-shaped pipe structure, and the connecting end of the butt-joint pipe (6) and the air pump (5) is a single pipe opening, and the other two ends of the butt-joint pipe (6) are respectively connected to the detection pipe (14) and the standard pipe (15).

4. The battery box water cooling plate air tightness detection device based on differential pressure according to claim 1, characterized in that: The differential pressure detection assembly comprises: A main valve (7) is arranged in a single pipe opening of the butt joint pipe 1 (6), and the main valve (7) is electrically connected to a controller (9); A main pressure detector (8) installed in a single pipe opening of the butt-joint pipe (6), the main pressure detector (8) being electrically connected to a controller (9); A differential pressure sensor (10) is arranged between two pipe openings of the detection box (11), and a detection end of the differential pressure sensor (10) is located inside the two pipe openings of the detection box (11), and the differential pressure sensor (10) is electrically connected to the controller (9); A sub-control valve (12) installed in one port of the butt-joint pipe (6), the sub-control valve (12) being electrically connected to the controller (9); The second sub-control valve (13) is installed in the other port of the first butt joint pipe (6), and the second sub-control valve (13) is electrically connected to the controller (9).

5. The battery box water cooling plate air tightness detection device based on differential pressure according to claim 4 is characterized in that: The main pressure detector (8) is arranged on one side of the main valve (7), and both the main valve (7) and the main pressure detector (8) are electrically connected to the controller (9).

6. The battery box water cooling plate air tightness detection device based on differential pressure according to claim 4, characterized in that: The pipe opening of the butt joint pipe 1 (6) connected to the sub-control valve 1 (12) is in communication with the standard pipe (15), the pipe opening of the butt joint pipe 1 (6) connected to the sub-control valve 2 (13) is in communication with the detection pipe (14), and the other ends of the detection pipe (14) and the standard pipe (15) are both butt jointed with a butt joint pipe 2 (16).

7. The battery box water cooling plate air tightness detection device based on differential pressure according to claim 6 is characterized in that: A connector (17) is provided at one end of the second butt-jointed pipe (16), and the outer wall surface of the connector (17) is slidably connected to a limit ring (18), and the inner wall surface of the limit ring (18) is provided with a slide rail.

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