Airtight test auxiliary device for new energy automobile power battery system

Abstract

The utility model relates to battery detection technical field, concretely is a kind of air-tight test auxiliary device for new energy automobile power battery system, including base, first support rod is fixedly connected on base, first support rod is fixedly connected with placing plate, and placing plate is fixedly connected on second support rod, detection assembly is provided on second support rod, and detection assembly includes sealed jar, air cylinder, piston plate, fixed pipe and piston block, sealed jar is fixedly connected on second support rod, piston plate is slidably connected in the inside of sealed jar, air cylinder is fixedly connected on base, and the output shaft of air cylinder is fixedly connected with the bottom of piston plate;The utility model can place battery device in sealed jar and detect, determine whether battery device exists gas release abnormal condition by whether the change of the gas volume in sealed jar, and the volume of gas in sealed jar can be increased by heating mode, to increase the expansion coefficient of gas volume with gas volume.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, specifically an auxiliary device for airtightness testing of power battery systems for new energy vehicles. Background Technology

[0002] New energy vehicle batteries mainly use hydrogen and electricity to replace fuel, achieving low pollution and low noise effects. They are currently the main energy source for electric vehicles. During use, new energy batteries may release gas if they malfunction, such as during thermal runaway or abnormal operation. Therefore, detecting gas release is a direct detection method when testing battery systems.

[0003] However, the amount of gas released by a battery is usually small. The conventional testing method is to place the battery system in a sealed container to detect changes in the gas pressure inside the container. However, since the amount of gas released is extremely small, the actual change in gas pressure inside the container during the testing process may be very small, making it difficult to determine whether the battery system is faulty. Therefore, an airtightness testing auxiliary device is needed to detect whether there are any abnormalities in the amount of gas released when the battery system is working. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model proposes an auxiliary device for airtightness testing of power battery systems for new energy vehicles. This device can place the battery device inside a sealed container for testing. By detecting whether the amount of gas inside the sealed container changes, it can determine whether there is an abnormal gas release from the battery device. Furthermore, the volume of gas inside the sealed container can be increased by heating to increase the gas volume expansion coefficient with the amount of gas.

[0005] The technical solution to achieve the purpose of this utility model is as follows: an auxiliary device for airtightness testing of a power battery system for new energy vehicles, comprising a base, a first support rod fixedly connected to the base, a placement plate fixedly connected to the first support rod, a second support rod fixedly connected to the placement plate, and a detection component provided on the second support rod. The detection component includes a sealed container, a cylinder, a piston plate, a fixed tube, and a piston block. The sealed container is fixedly connected to the second support rod, the piston plate is slidably connected to the inside of the sealed container, the cylinder is fixedly connected to the base, the output shaft of the cylinder is fixedly connected to the bottom of the piston plate, the fixed tube is fixedly connected to the sealed container, the piston block is slidably connected to the inside of the fixed tube, and an auxiliary component is provided on the sealed container.

[0006] Preferably, the detection assembly further includes a top tube and a plug, the top tube being fixedly connected to the sealed container, the plug being disposed on the top tube, and the top tube communicating with the interior of the sealed container.

[0007] Preferably, the detection component further includes a scale line, which is disposed on a fixed tube made of transparent material.

[0008] Preferably, the auxiliary component includes a heating plate, which is fixedly connected to the top inner wall of the sealed container.

[0009] Preferably, the auxiliary component further includes a pull rod, which is fixedly connected to the piston block, with one end of the pull rod located outside the fixed tube.

[0010] Preferably, the auxiliary component further includes a spring, which is fixedly connected between the piston block and the inner wall of the fixed tube.

[0011] Compared with the prior art, the significant advantages of this utility model are:

[0012] Firstly, in this invention, the piston plate can be raised and lowered by a cylinder. When the piston plate descends to the placement plate, the battery device to be tested and the testing device can be placed on the piston plate together. Then, the cylinder is used to raise the piston plate into the sealed container. At this point, the tube plug needs to be removed, and the piston plate continues to rise until the battery device is about to contact the heating plate at the top of the sealed container. At this point, the heating plate is activated, causing the gas volume inside the sealed container to expand. Once the air temperature and volume inside the sealed container stabilize, the tube plug is tightened, and the entire sealed container is now in a closed state. The heating plate is kept open, and the testing device is used to test the battery device, causing it to start working and detecting whether gas is generated during the use of the battery device.

[0013] Secondly, in this invention, when the battery device is tested using the detection device, if the gas release is abnormal and the temperature of the sealed container is relatively high, the released gas will also be heated. The volume of the heated gas will increase, and the piston block will be squeezed by the increased gas. At this time, the piston block will move inside the fixed tube. The initial position of the piston block corresponds to the zero mark on the scale. When the piston block moves, the scale mark corresponding to the piston block can be seen to change. Therefore, it is possible to directly observe whether the gas volume inside the sealed container has changed. Since the fixed tube is thin, even a small change in gas will cause the piston block to move significantly, which can be observed with the naked eye. Furthermore, since the piston plate has been moved to the top of the sealed container as much as possible, the total gas volume inside the sealed container has been compressed to a minimum to maximize the movement distance of the piston block when the gas increases. Attached Figure Description

[0014] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the sealed container in this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the fixing tube of this utility model;

[0019] Figure 5 This is a cross-sectional view of the internal structure of the fixed tube in this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Base; 2. First support rod; 3. Placement plate; 4. Second support rod; 5. Detection component; 51. Sealed container; 52. Cylinder; 53. Piston plate; 54. Fixing tube; 55. Piston block; 56. Top tube; 57. Tube plug; 58. Scale line; 6. Auxiliary component; 61. Heating plate; 62. Pull rod; 63. Spring. Detailed Implementation

[0022] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0023] This utility model provides an improved auxiliary device for airtightness testing of power battery systems for new energy vehicles. The technical solution of this utility model is as follows:

[0024] like Figures 1-5As shown, an auxiliary device for airtightness testing of a power battery system for new energy vehicles includes a base 1, a first support rod 2 fixedly connected to the base 1, a placement plate 3 fixedly connected to the first support rod 2, a second support rod 4 fixedly connected to the placement plate 3, and a detection component 5 disposed on the second support rod 4. The detection component 5 includes a sealed container 51, a cylinder 52, a piston plate 53, a fixed tube 54, and a piston block 55. The sealed container 51 is fixedly connected to the second support rod 4, the piston plate 53 is slidably connected to the inside of the sealed container 51, the cylinder 52 is fixedly connected to the base 1, and the output shaft of the cylinder 52 is fixedly connected to the bottom of the piston plate 53. The cylinder 52 can control the piston plate 53 to move up and down inside the sealed container 51, and can move the piston plate 53 as high as possible to reduce the total capacity inside the sealed container 51. This will compress the original gas volume inside the sealed container 51 to a minimum during battery testing, thereby increasing the impact of the gas released during battery testing on the total gas volume. The fixed tube 54 is fixedly connected to the sealed container 51, and the piston block 55 is slidably connected inside the fixed tube 54. Since the fixed tube 54 is relatively thin, the piston block 55 will move significantly when the gas volume inside the sealed container 51 changes. An auxiliary component 6 is provided on the sealed container 51.

[0025] In this invention, the detection component 5 also includes a top tube 56 and a tube plug 57. The top tube 56 is fixedly connected to the sealed container 51, and the tube plug 57 is disposed on the top tube 56. The top tube 56 is in communication with the interior of the sealed container 51. When the tube plug 57 is removed, the piston plate 53 can send the battery device into the sealed container 51. When testing is to be performed, the tube plug 57 can be reinstalled to make the interior of the sealed container 51 a sealed environment.

[0026] In this invention, the detection component 5 also includes a scale line 58, which is set on the fixed tube 54. The fixed tube 54 is made of transparent material, and the scale line 58 is used to observe the moving distance of the piston block 55.

[0027] In this invention, the auxiliary component 6 includes a heating plate 61, which is fixedly connected to the top inner wall of the sealed container 51. The heating plate 61 is used to heat the air inside the sealed container 51 to increase the gas volume before the detection begins, and at the same time, the coefficient of gas volume change with gas quantity is increased by heating.

[0028] In this utility model, the auxiliary component 6 also includes a pull rod 62, which is fixedly connected to the piston block 55. One end of the pull rod 62 is located outside the fixed tube 54. Before the detection of the piston block 55 begins, it can be pushed to the position corresponding to the zero mark on the scale line 58 by the pull rod 62.

[0029] In this utility model, the auxiliary component 6 also includes a spring 63, which is fixedly connected between the piston block 55 and the inner wall of the fixed tube 54. When the spring 63 is not under force, the position of the piston block 55 will be exactly at the zero mark on the scale line 58. Therefore, when the piston block 55 is moved by the pull rod 62, the piston block 55 can be pushed back to the initial position of the zero mark.

[0030] The specific working method is as follows: The piston plate 53 can be raised and lowered by the cylinder 52. When the piston plate 53 descends to the placement plate 3, the battery device to be tested and the testing device can be placed on the piston plate 53 together. Then, the piston plate 53 is raised into the sealed container 51 by the cylinder 52. At this time, the tube plug 57 needs to be removed so that the piston plate 53 continues to rise until the battery device is about to contact the heating plate 61 at the top of the sealed container 51. At this time, the heating plate 61 is activated to expand the gas volume in the sealed container 51. When the air temperature and volume in the sealed container 51 are stable, the tube plug 57 is tightened. The entire sealed container 51 is now in a closed state. At this time, the heating plate 61 is kept open, and the testing device is used to test the battery device to start the battery device to work and detect whether the battery device will generate gas during use.

[0031] When testing the battery device using the detection device, if there is an abnormal gas release, the temperature of the sealed container 51 will be relatively high, and the released gas will also be heated. The volume of the heated gas will increase, and the piston block 55 will be squeezed by the increased gas. At this time, the piston block 55 will move inside the fixed tube 54. The initial position of the piston block 55 corresponds to the zero mark on the scale line 58. When the piston block 55 moves, the scale line 58 corresponding to the piston block 55 can be seen to change. Therefore, it is possible to directly observe whether the gas volume inside the sealed container 51 has changed. Since the fixed tube 54 is relatively thin, even a small change in gas will cause the piston block 55 to move significantly, which can be observed with the naked eye. Since the piston plate 53 has been moved to the top of the sealed container 51 as much as possible, the total gas volume inside the sealed container 51 has been compressed to a minimum to maximize the movement distance of the piston block 55 when the gas increases.

[0032] After the test is completed, remove the tube plug 57, and push the piston block 55 back to the position corresponding to the zero mark on the scale line 58 using the pull rod 62. Then the test device and battery device can be taken out from the sealed container 51.

[0033] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. An auxiliary device for airtightness testing of power battery systems for new energy vehicles, comprising: A base (1), a first support rod (2) fixedly connected to the base (1), a placement plate (3) fixedly connected to the first support rod (2), and a second support rod (4) fixedly connected to the placement plate (3), characterized in that: The second support rod (4) is provided with a detection component (5), which includes a sealed container (51), a cylinder (52), a piston plate (53), a fixed tube (54), and a piston block (55). The sealed container (51) is fixedly connected to the second support rod (4), the piston plate (53) is slidably connected to the inside of the sealed container (51), the cylinder (52) is fixedly connected to the base (1), the output shaft of the cylinder (52) is fixedly connected to the bottom of the piston plate (53), the fixed tube (54) is fixedly connected to the sealed container (51), and the piston block (55) is slidably connected to the inside of the fixed tube (54). An auxiliary component (6) is provided on the sealed container (51).

2. The airtightness testing auxiliary device for a power battery system of a new energy vehicle according to claim 1, characterized in that: The detection component (5) also includes a top tube (56) and a tube plug (57). The top tube (56) is fixedly connected to the sealed container (51), and the tube plug (57) is disposed on the top tube (56). The top tube (56) is in communication with the interior of the sealed container (51).

3. The airtightness testing auxiliary device for a power battery system of a new energy vehicle according to claim 2, characterized in that: The detection component (5) also includes a scale line (58), which is set on a fixed tube (54) and the fixed tube (54) is made of transparent material.

4. The airtightness testing auxiliary device for a power battery system of a new energy vehicle according to claim 1, characterized in that: The auxiliary component (6) includes a heating plate (61), which is fixedly connected to the top inner wall of the sealed container (51).

5. The airtightness testing auxiliary device for a power battery system of a new energy vehicle according to claim 4, characterized in that: The auxiliary component (6) also includes a pull rod (62), which is fixedly connected to the piston block (55), with one end of the pull rod (62) located outside the fixed tube (54).

6. The airtightness testing auxiliary device for a power battery system of a new energy vehicle according to claim 5, characterized in that: The auxiliary component (6) also includes a spring (63), which is fixedly connected between the piston block (55) and the inner wall of the fixed tube (54).

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