An air tightness detection device for vehicle-mounted charger

Abstract

The utility model relates to new energy automobile technical field, specifically disclose a kind of air-tightness detection device for vehicle charger, including the fixed base of horizontal placement ground;The fixed base upper surface is symmetrically fixed and connected with guiding support plate;Guiding support plate is opened with guiding groove;Slidingly inserted with movable support plate in guiding groove;By placing multiple vehicle charger on movable support plate upper surface, then the cavity opening of vehicle charger is aligned with air pressure detection unit, then hydraulic push rod jacking pushes movable support plate to move upwards, so that the cavity opening of vehicle charger is sealed contact with air pressure detection unit, then air pressure detection unit input rated air pressure enters the cavity of vehicle charger, and keep certain time, air pressure keeps unchanged in certain time, that is, it can be indicated that the cavity air-tightness of vehicle charger is qualified;Then hydraulic push rod descends movement, with movable support plate descending away from functional top plate, it is convenient to take and place vehicle charger.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle technology, specifically an airtightness detection device for an on-board charger. Background Technology

[0002] An on-board charger is a charger that is fixedly installed on an electric vehicle. It has the ability to safely and automatically fully charge the electric vehicle's power battery. Based on the data provided by the battery management system (BMS), the charger can dynamically adjust the charging current or voltage parameters, perform corresponding actions, and complete the charging process.

[0003] Chinese invention patent CN108151974A, published on June 12, 2018, discloses an airtightness testing device, including a frame and a lifting pressure plate, a lifting base plate, a cylinder, a valve, and a water tank mounted on the frame. The lifting pressure plate is located above the lifting base plate, the cylinder is connected to the lifting pressure plate, the valve is located on the lifting pressure plate, and the lifting base plate is located above the water tank. Thus, the airtightness of the product is tested by pressing the product under test into the water tank using the cylinder, filling the product with compressed air using the valve, and then observing whether bubbles are generated on the surface of the product.

[0004] However, the above-mentioned publicly available solutions have the following shortcomings: Existing air pressure sealing testing devices all use cylinders to squeeze and seal the items to be tested. The number of items that can be tested is limited by the area of ​​the placement platform, which means that more items cannot be placed when testing the air tightness of on-board chargers. In addition, the groove positioning method requires manual installation and removal of each on-board charger, which is inefficient when testing in batches. Utility Model Content

[0005] The purpose of this invention is to solve the technical problems of existing air pressure seal testing devices, which all use cylinders to squeeze and seal the items to be tested. This method limits the number of items that can be tested to the area of ​​the placement platform, resulting in the inability to place more items when testing the air tightness of on-board chargers. In addition, the groove positioning method requires manual installation and removal of each on-board charger, which leads to low efficiency in batch testing. The invention provides an air tightness testing device for on-board chargers.

[0006] To achieve the above objectives, the present invention adopts the following technical solution;

[0007] The present invention discloses an airtightness detection device for a vehicle-mounted charger, comprising a fixed base placed horizontally on the ground; guide support plates symmetrically fixed to the upper surface of the fixed base; guide grooves formed on the guide support plates; a movable support plate slidably inserted into the guide grooves; positioning pins symmetrically fixed to both sides of the movable support plate; hydraulic push rods connected between the positioning pins and the fixed base; a functional top plate fixed to the upper end of the guide support plate; and an air pressure detection unit corresponding to the movable support plate on the functional top plate.

[0008] Furthermore, the air pressure detection unit includes multiple positioning tubes arrayed and fixed on the functional top plate; an air pressure gauge is connected and fixed to the upper end of each positioning tube; a connecting tube is connected and fixed to the side of each positioning tube; and an air pump is connected and fixed to the end of each connecting tube.

[0009] Furthermore, a positioning groove is provided on the upper surface of the movable support plate; a unit placement plate is slidably inserted into the positioning groove; and multiple placement grooves are provided on the upper surface of the unit placement plate.

[0010] The airtightness detection device for an on-board charger provided by this utility model has the following beneficial effects:

[0011] 1. This utility model involves placing multiple vehicle-mounted chargers on the upper surface of a movable support plate, aligning the cavity openings of the vehicle-mounted chargers with a pressure detection unit, and then using a hydraulic push rod to lift and push the movable support plate upwards, ensuring a sealed contact between the cavity openings of the vehicle-mounted chargers and the pressure detection unit. The pressure detection unit then inputs rated air pressure into the cavity of the vehicle-mounted charger and maintains it for a certain period. If the air pressure remains constant within this period, it indicates that the cavity airtightness of the vehicle-mounted charger is qualified. Finally, the hydraulic push rod descends, taking the movable support plate away from the functional top plate, facilitating the loading and unloading of the vehicle-mounted chargers.

[0012] 2. This utility model collects atmospheric air by powering on, pressurizes it, and maintains the pressurized air for a period of time. The pressurized air is then injected into the container opening of the vehicle charger through the connecting pipe and the positioning pipe. The air pressure is then detected by a pressure gauge. If the air pressure remains constant for a certain period of time, it indicates that the container of the vehicle charger is sealed properly. If the air pressure continues to drop for a certain period of time, it indicates that the container of the vehicle charger is not sealed properly. Attached Figure Description

[0013] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings;

[0014] Figure 1 This is a schematic diagram of the first isometric structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the second isometric structure of this utility model;

[0016] Figure 3 This is a front view structural diagram of the present invention.

[0017] The following are the labels in the diagram: 1. Fixed base; 2. Guide support plate; 3. Hydraulic push rod; 4. Positioning pin; 5. Movable support plate; 6. Positioning groove; 7. Unit placement plate; 8. Placement groove; 9. Handle; 10. Fastener; 11. Limit block; 12. Functional top plate; 13. Positioning tube; 14. Connecting tube; 15. Pressure gauge; 16. Air pump; 17. Guide groove. Detailed Implementation

[0018] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0019] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that all directional indications (such as up-down-left-right-forward-backward...) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0021] Please see Figure 1-3As shown, an airtightness detection device for an on-board charger includes a fixed base 1 placed horizontally on the ground; guide support plates 2 are symmetrically fixed to the upper surface of the fixed base 1; guide grooves 17 are formed on the guide support plates 2; a movable support plate 5 is slidably inserted into the guide grooves 17; positioning pins 4 are symmetrically fixed to both sides of the movable support plate 5; a hydraulic push rod 3 is connected between the positioning pins 4 and the fixed base 1; a functional top plate 12 is fixed to the upper end of the guide support plate 2; an air pressure detection unit is provided on the functional top plate 12 corresponding to the movable support plate 5, which detects air pressure by placing multiple on-board chargers... On the upper surface of the movable support plate 5, the cavity opening of the on-board charger is aligned with the air pressure detection unit. Then, the hydraulic push rod 3 is lifted to push the movable support plate 5 upward, so that the cavity opening of the on-board charger is in sealed contact with the air pressure detection unit. Then, the air pressure detection unit inputs the rated air pressure into the cavity of the on-board charger and maintains it for a certain period of time. If the air pressure remains unchanged for a certain period of time, it can be said that the airtightness of the cavity of the on-board charger is qualified. Then, the hydraulic push rod 3 moves downward, taking the movable support plate 5 down away from the functional top plate 12, making it convenient to pick up and put down the on-board charger.

[0022] The air pressure detection unit includes multiple positioning tubes 13 arrayed and fixed on the functional top plate 12; an air pressure gauge 15 is connected and fixed to the upper end of the positioning tube 13; a connecting tube 14 is connected and fixed to the side of the positioning tube 13; an air pump 16 is connected and fixed to the end of the connecting tube 14. By energizing the pump, atmospheric air is collected, pressurized, and maintained for a period of time. The pressurized atmospheric air is injected into the container opening of the on-board charger through the connecting tube 14 and the positioning tube 13. The air pressure is then detected by the air pressure gauge 15. If the air pressure remains constant for a certain period of time, it indicates that the container of the on-board charger is sealed properly; if the air pressure continues to drop for a certain period of time, it indicates that the container of the on-board charger is not sealed properly.

[0023] The upper surface of the movable support plate 5 is provided with a positioning groove 6; a unit placement plate 7 is slidably inserted into the positioning groove 6; the upper surface of the unit placement plate 7 is provided with multiple placement grooves 8, through which multiple on-board chargers can be placed, and then the unit placement plate 7 can be moved as a whole to achieve rapid batch movement for air tightness testing, and then the movable support plate 5 can be placed in a precise position for air tightness testing through the positioning groove 6.

[0024] The movable support plate 5 has symmetrical holes on both sides and is threaded with fasteners 10; a limit block 11 is sleeved on the fastener 10; the limit block 11 contacts the sliding surfaces on both sides of the guide support plate 2, and the position of the limit block 11 is fixed by the fasteners 10, so that the movable support plate 5 remains horizontal during the up and down movement, so that the up and down movement of the movable support plate 5 is not affected when the on-board charger is placed eccentrically on the unit placement plate 7.

[0025] Handles 9 are symmetrically fixed to both sides of the unit placement plate 7. The handles 9 allow two people to hold the handles 9 and move the unit placement plate 7, thereby realizing the batch movement of multiple on-board chargers. This allows multiple unit placement plates 7 to be prepared to hold a large number of on-board chargers for airtightness testing, improving the efficiency of batch testing.

[0026] The positioning tube 13 is aligned with the opening of the vehicle charger cavity. By aligning the positioning tube 13 with the opening of the vehicle charger cavity, the opening of the vehicle charger cavity can be connected through the positioning tube 13 and sealed. The air pump 16 can be powered on to generate 1.5 times the atmospheric pressure, which is injected into the vehicle charger cavity through the connecting tube 14 and the positioning tube 13. Then, the atmospheric pressure in the positioning tube 13 is detected by the air pressure gauge 15. When the value of the air pressure gauge 15 remains stable for a certain period of time, the vehicle charger cavity can be detected as qualified and can withstand the pressure designed for safety to maintain a seal.

[0027] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An airtightness detection device for an on-board charger, characterized in that; The system includes a fixed base (1) placed horizontally on the ground; a guide support plate (2) is symmetrically fixed to the upper surface of the fixed base (1); a guide groove (17) is provided on the guide support plate (2); a movable support plate (5) is slidably inserted into the guide groove (17); positioning pins (4) are symmetrically fixed to both sides of the movable support plate (5); a hydraulic push rod (3) is connected between the positioning pin (4) and the fixed base (1); a functional top plate (12) is fixed to the upper end of the guide support plate (2); and a pressure detection unit is provided on the functional top plate (12) corresponding to the movable support plate (5).

2. The airtightness detection device for an on-board charger according to claim 1, characterized in that: The air pressure detection unit includes multiple positioning tubes (13) arrayed and fixed on the functional top plate (12); an air pressure gauge (15) is connected and fixed to the upper end of the positioning tube (13); a connecting tube (14) is connected and fixed to the side of the positioning tube (13); and an air pump (16) is connected and fixed to the end of the connecting tube (14).

3. The airtightness detection device for an on-board charger according to claim 1, characterized in that: The upper surface of the movable support plate (5) is provided with a positioning groove (6); a unit placement plate (7) is slidably inserted into the positioning groove (6); and multiple placement grooves (8) are provided on the upper surface of the unit placement plate (7).

4. The airtightness detection device for an on-board charger according to claim 1, characterized in that: The movable support plate (5) has symmetrical holes on both sides and is threaded with fasteners (10); a limiting block (11) is sleeved on the fastener (10); the limiting block (11) is in contact with the sliding surfaces on both sides of the guide support plate (2).

5. The airtightness detection device for an on-board charger according to claim 3, characterized in that: Handles (9) are symmetrically fixed to both sides of the unit placement plate (7).

6. The airtightness detection device for an on-board charger according to claim 2, characterized in that: The positioning tube (13) is aligned with the opening of the cavity of the on-board charger.

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