A sensor fault diagnosis device for a new energy automobile battery pack

Abstract

The utility model discloses a kind of for new energy automobile battery pack inside sensor fault diagnosis device, including fixed clamp, diagnosis assembly, vacuum subassembly and detection probe, fixed clamp includes cross arm, first clamping plate and second clamping plate, first clamping plate is provided with first holding piece, second clamping plate is provided with second holding piece, diagnosis assembly includes the detection piece matched with the component of battery pack upper airflow passage, detection piece includes connecting cover and the gas connecting piece being set on connecting cover, detection probe includes connecting rod and detection rod.The utility model provides for new energy automobile battery pack inside sensor fault diagnosis device, first clamping plate and second clamping plate can be fixed on battery pack with diagnosis assembly, the airtightness of battery pack can be conveniently diagnosed and detected by diagnosis assembly and vacuum subassembly, the data detected by detection probe corresponds with the sensor data of battery pack inner air pressure measurement, whether the damage of battery pack inside sensor can be diagnosed.

Description

Technical Field

[0001] This utility model relates to the field of automotive repair technology, and in particular to a fault diagnosis device for sensors in the battery packs of new energy vehicles. Background Technology

[0002] New energy vehicle battery packs are primarily fixed to the vehicle chassis. During rainy days or when driving over wet roads, the battery pack may be splashed with water or submerged. Therefore, the development of automotive power battery packs often requires high levels of sealing. After sealing, the internal and external pressures of the battery pack need to be balanced. The main balancing method is to install a pressure equalization valve on the battery pack. Additionally, sensors are often installed inside the battery pack to monitor internal pressure changes in real time, determining whether the seals are aging or damaged.

[0003] Over long-term use, the battery pack's sealing performance may deteriorate. In the event of a collision or scrape to the bottom, the extent of battery damage may not be readily apparent. Since the bottom of the battery pack is frequently scraped during vehicle operation, it's impossible to immediately send it for factory inspection upon impact. Severe scrapes can further degrade the battery pack's sealing performance. Furthermore, the probability of water ingress or immersion in the battery pack is higher when driving in rain or on wet roads. Water entering the battery pack can damage the pressure sensors inside, preventing the owner from promptly detecting airtightness issues. In severe cases, this can lead to battery leakage, short circuits, or even fires. Utility Model Content

[0004] The purpose of this invention is to provide a fault diagnosis device for sensors in the battery pack of new energy vehicles, so as to solve the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A fault diagnosis device for sensors in a new energy vehicle battery pack, comprising:

[0007] A fixing clamp includes a horizontal arm and a first clamping plate and a second clamping plate disposed on opposite sides of the horizontal arm. A first clamping member is disposed on the first clamping plate and a second clamping member is disposed on the second clamping plate. The first clamping member and the second clamping member can be fixedly clamped to the side walls on both sides of the battery pack.

[0008] A diagnostic component includes a detection element that matches the components of the airflow channel on the battery pack. Other ventilation structures on the battery pack are provided with sealing elements. The detection element includes a connecting cover and a gas connector provided on the connecting cover. The end of the gas connector is provided with a gas interface. A mounting plate is provided on the cross arm. The connecting cover is fixedly mounted on the mounting plate by the mounting element.

[0009] A vacuum assembly, comprising a vacuum source and a gas switch, wherein the vacuum source is connected to the gas interface via a connecting pipe, and a buffer is provided between the vacuum source and the gas interface;

[0010] The detection probe includes a connecting rod and a probe rod. The connecting rod is fixedly installed inside the connecting cover and communicates with the gas connector. A gas pressure detector is provided on the probe rod.

[0011] The aforementioned fault diagnosis device for sensors in a new energy vehicle battery pack includes a first fixing foot disposed on the first clamping plate, and there are at least two first fixing feet.

[0012] In the aforementioned fault diagnosis device for sensors in a new energy vehicle battery pack, the second clamping member is adjustablely mounted on the second clamping plate. The second clamping member includes a movable clamping plate and a second fixed foot disposed on the movable clamping plate. An adjustment drive is disposed on the second clamping plate, and the movable clamping plate is connected to the adjustment drive.

[0013] The aforementioned fault diagnosis device for sensors inside a battery pack of a new energy vehicle includes an inner sleeve inside the connecting cover, the inner sleeve being fixedly installed inside the connecting sleeve, and an annular groove on the outer side wall of the inner sleeve, with an annular spring installed inside the annular groove.

[0014] The aforementioned fault diagnosis device for sensors inside a battery pack of a new energy vehicle has multiple radial openings on the side wall of the inner sleeve, and the multiple radial openings are arranged sequentially at intervals along the circumference of the inner sleeve.

[0015] The aforementioned fault diagnosis device for sensors in a new energy vehicle battery pack further includes an annular elastic sleeve, on which a plurality of radial connectors are provided, and the plurality of radial connectors are arranged sequentially at intervals along the circumference of the annular elastic sleeve.

[0016] The aforementioned fault diagnosis device for sensors in a new energy vehicle battery pack includes a radial connector comprising an arc-shaped plate and a radial block disposed on the arc-shaped plate. The arc-shaped plate is fixedly connected to the annular elastic sleeve, and the radial block is slidably connected within the radial opening. An arc-shaped groove for mounting the annular spring is provided on the side of the radial block away from the arc-shaped plate.

[0017] In the above technical solution, the present invention provides a fault diagnosis device for sensors inside a new energy vehicle battery pack, including a fixing clamp, a diagnostic component, a vacuum component, and a detection probe. The fixing clamp includes a horizontal arm and a first clamping plate and a second clamping plate disposed on opposite sides of the horizontal arm. A first clamping member is disposed on the first clamping plate, and a second clamping member is disposed on the second clamping plate. The diagnostic component includes a detection component that matches the components of the airflow channel on the battery pack. The detection component includes a connecting cover and a gas connector disposed on the connecting cover. The gas interface of the gas connector is connected to the vacuum component. The detection probe includes a connecting rod and a detection rod. The connecting rod is fixedly installed inside the connecting cover and communicates with the gas connector. A pressure detector is disposed on the detection rod. Thus, when diagnosing and testing the battery pack of the vehicle, the diagnostic component can be fixed to the battery pack through the first clamping plate and the second clamping plate. The diagnostic component and the vacuum component can conveniently diagnose and test the airtightness of the battery pack. The data detected by the detection probe corresponds to the sensor data of the air pressure measurement inside the battery pack, and the damage of the air pressure sensor inside the battery pack can be diagnosed. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the structure of a sensor fault diagnosis device for a new energy vehicle battery pack provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the fixing clamp provided in an embodiment of the present utility model;

[0021] Figure 3 A perspective view of the fixing clamp provided in an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the diagnostic component provided in an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the inner sleeve provided in an embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram of the installation of the annular elastic sleeve provided in an embodiment of the present utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Fixture; 11. Cross arm; 12. First clamping plate; 13. Second clamping plate; 14. First clamping component; 141. First fixed foot; 15. Second clamping component; 151. Movable clamping plate; 152. Second fixed foot; 153. Adjustment drive component; 154. Guide rod; 155. Guide hole; 2. Diagnostic component; 21. Detection component; 22. Connecting cover; 23. Gas connection component; 231. Gas interface; 24. Mounting plate; 25. Inner sleeve; 251. Annular groove; 252. Radial opening; 26. Radial connector; 261. Arc plate; 262. Radial block; 27. Annular elastic sleeve; 28. Annular spring; 3. Vacuum component; 31. Vacuum source; 32. Gas switch; 33. Buffer; 34. Connecting pipe; 4. Detection probe; 41. Connecting rod; 42. Detection rod; 43. Gas pressure detector. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] like Figure 1-6 As shown, this utility model provides a sensor fault diagnosis device for a new energy vehicle battery pack, including a fixing clamp 1, a diagnostic component 2, a vacuum component 3, and a detection probe 4. The fixing clamp 1 includes a horizontal arm 11 and a first clamping plate 12 and a second clamping plate 13 disposed on opposite sides of the horizontal arm 11. A first clamping member 14 is disposed on the first clamping plate 12, and a second clamping member 15 is disposed on the second clamping plate 13. The first clamping member 14 and the second clamping member 15 can be fixedly clamped to the side walls on both sides of the battery pack. The diagnostic component 2 includes a detection probe 21 that matches the components of the airflow channel on the battery pack. Other ventilation structures on the battery pack are provided with sealing members. 21 includes a connecting cover 22 and a gas connector 23 disposed on the connecting cover 22. The end of the gas connector 23 is provided with a gas interface 231. A mounting plate 24 is provided on the cross arm 11. The connecting cover 22 is mounted on the mounting plate 24 through the mounting component. The vacuum assembly 3 includes a vacuum source 31 and a gas switch 32. The vacuum source 31 is connected to the gas interface 231 through a connecting pipe 34. A buffer 33 is provided between the vacuum source 31 and the gas interface 231. The detection probe 4 includes a connecting rod 41 and a detection rod 42. The connecting rod 41 is installed inside the connecting cover 22 and is connected to the gas connector 23. A pressure detector 43 is provided on the detection rod 42.

[0029] Specifically, the fixing clamp 1 is used to fix and hold the battery pack during the testing process. The fixing clamp 1 includes a horizontal arm 11, a first clamping plate 12, and a second clamping plate 13. The first clamping plate 12 and the second clamping plate 13 are respectively set at opposite ends of the horizontal arm 11. The first clamping plate 12 and the second clamping plate 13 are both set perpendicular to the horizontal arm 11. The first clamping plate 12, the second clamping plate 13, and the horizontal arm 11 can be set as a whole. The length of the horizontal arm 11 is set to correspond to the size of the battery pack. A first clamping member 14 is set on the first clamping plate 12, and a second clamping member 15 is set on the second clamping plate 13. At least one of the first clamping member 14 and the second clamping member 15 is adjustable. For example, the first clamping member 14 is fixedly installed on the first clamping plate 12, and the second clamping member 15 is adjustablely installed on the second clamping plate 13. In this way, the second clamping member 15 can be adjusted as needed during use, so that the first clamping member 14 and the second clamping member 15 can be respectively clamped and fixed on opposite sides of the battery pack.

[0030] In this embodiment, the diagnostic component 2 includes a detection element 21 that matches the components of the airflow channel on the battery pack. It should be noted that the airflow channel serves as the connection channel between the diagnostic component 2 and the battery pack. This connection channel can be a component such as an explosion-proof valve or a balance valve, or other components on the battery pack with airflow channels, such as the socket of the battery pack's manual maintenance switch, used for airtightness testing. During use, after one of the components with an airflow channel is used as the connection channel, the other airflow channels that allow gas output from the battery pack are sealed using a sealing component, which can be a customized silicone plug.

[0031] In this embodiment, the detection component 21 includes a connecting cover 22 and a gas connector 23. The connecting cover 22 is made of rigid engineering plastic injection molding and is a hollow cylindrical structure. A sealing element is provided on the inner wall of the connecting cover 22. A through hole matching the size of the battery pack airflow channel components is opened at the bottom of the connecting cover 22. The gas connector 23 is a gas connecting pipe. The lower end of the gas connecting pipe is connected to the connecting cover 22. A gas interface 231 is provided on the top of the gas connecting pipe 34. The gas interface 231 is used to connect to the vacuum component 3.

[0032] Vacuum assembly 3 includes a gas switch 32 and a vacuum source 31. The vacuum source 31 is connected to the gas interface 231 via a connecting pipe 34. The gas switch 32 is mounted on the connecting pipe 34 and can be a manual valve or a solenoid valve. The vacuum source 31 is a vacuum pump or a vacuum pump. Buffer 33 is a cylindrical metal container with multiple labyrinthine baffles arranged axially inside. Buffer 33 is positioned between the gas connector 23 and the gas switch 32 to intercept liquid drawn from the battery pack, preventing liquid introduced from the battery pack from damaging the subsequently connected vacuum pump.

[0033] The detection probe 4 includes a connecting rod 41 and a detection rod 42, which can be an integral structure. The connecting rod 41 is installed inside the connecting cover 22 and is connected to the gas connector 23. The upper end of the connecting rod 41 is fixedly connected to the top of the inner wall of the connecting cover 22. A gas channel is provided inside the connecting rod 41, which is connected to the gas connector 23. An air outlet is provided on the connecting rod 41, so that the gas connector 23 is connected to the inside of the battery pack through the gas channel. Gas can be delivered to the inside of the battery pack through the air outlet. During use, the detection rod 42 is inserted into the inside of the battery pack, and the air pressure inside the battery pack can be detected by the air pressure detector 43. The detection data of the air pressure detector 43 is compared with the value of the air pressure sensor inside the battery pack to determine whether the original air pressure measurement sensor inside the battery pack is normal.

[0034] The operating steps during use are as follows:

[0035] Fixture 1 installation: Place the first clamping plate 12 and the second clamping plate 13 of fixture 1 on the two side walls of the battery pack to be tested.

[0036] Installation of Detector 21: Align the connecting cover 22 with the components of the airflow channel on the battery pack. Insert the probe 42 into the inside of the battery pack. The connecting cover 22 is fixedly connected to the components of the airflow channel, thus connecting the battery pack with the gas connector 23. Then, the first clamp 14 presses against the left side wall of the battery pack, and the second clamp 15 presses against the right side wall of the battery pack, thereby fixing the clamp 1 on the battery pack. Pick up the corresponding sealing pieces one by one to seal the non-detection ventilation structure of the battery pack.

[0037] Vacuum assembly 3 installation: Connect the vacuum source 31, buffer 33 and gas connector 23 in sequence, so that the battery pack, buffer 33, vacuum source 31 and detection probe 4 are connected in sequence.

[0038] Air tightness test: The air tightness test procedure is as follows: The corresponding inflation / deflation process and the values ​​to be measured are set according to the test standard requirements.

[0039] First, inflate the battery pack under test with 3.5 kPa air pressure for 450 seconds, and stop when the air pressure reaches 3.0-3.5 kPa.

[0040] Secondly, after a stabilization operation lasting 60 seconds, the air pressure inside the battery pack under test is checked to see if it is within the range of 2.5 to 3.5 kPa.

[0041] Finally, check whether the leakage flow rate of the battery pack under test is within the range of -0.1cc / min to 0.5cc / min within 60 seconds after voltage stabilization. Determine whether it passes the test according to the requirements.

[0042] During this process, the air pressure detector 43 can detect the air pressure inside the battery pack. At the same time, the original air pressure sensor inside the battery pack also measures the air pressure inside the battery pack. The detection data of the air pressure detector 43 is compared with the value of the original air pressure sensor inside the battery pack to determine whether the original air pressure sensor inside the battery pack is normal.

[0043] The present invention provides a fault diagnosis device for sensors in a new energy vehicle battery pack, comprising a fixing clamp 1, a diagnostic component 2, a vacuum component 3, and a detection probe 4. The fixing clamp 1 includes a horizontal arm 11 and a first clamping plate 12 and a second clamping plate 13 disposed on opposite sides of the horizontal arm 11. A first clamping member 14 is disposed on the first clamping plate 12, and a second clamping member 15 is disposed on the second clamping plate 13. The diagnostic component 2 includes a detection probe 21 that matches the components of the airflow channel on the battery pack. The detection probe 21 includes a connecting cover 22 and a probe disposed on the connecting cover 22. The gas connector 23 has a gas interface 231 that is connected to the vacuum assembly 3. Thus, when performing diagnostic testing on the car's battery pack, the diagnostic assembly 2 can be fixed to the battery pack through the first clamp 12 and the second clamp 13. The airtightness of the battery pack can be easily diagnosed and tested through the diagnostic assembly 2 and the vacuum assembly 3. The data detected by the air pressure detector 43 on the detection probe 4 corresponds to the data of the air pressure measurement sensor in the battery pack, and it can be used to diagnose whether the original air pressure measurement sensor in the battery pack is damaged.

[0044] In this embodiment, preferably, the first clamping member 14 is fixedly installed on the first clamping plate 12. The first clamping member 14 includes a first fixing foot 141 disposed on the first clamping member. There are at least two first fixing feet 141. The second clamping member 15 is adjustablely installed on the second clamping plate 13. The second clamping member 15 includes a movable clamping plate 151 and a second fixing foot 152 disposed on the movable clamping plate 151. An adjustment driving member 153 is disposed on the second clamping plate 13. The movable clamping plate 151 is connected to the adjustment driving member 153.

[0045] The first fixing foot 141 is made of metal or engineering plastic with elastic cushioning, and its shape is adapted to the contour of one side wall of the battery pack, such as protrusions or grooves. When clamping the battery pack, simply move the battery pack closer to the first clamping plate 12 so that the first fixing foot 141 contacts the corresponding part of the side wall of the battery pack.

[0046] The second clamping plate 13 is provided with an adjusting drive component 153, such as a structure formed by a cylinder and a piston rod. The movable clamping plate 151 is connected to the end of the piston rod. The movable clamping plate 151 may also be provided with a guide rod 154. The second clamping plate 13 is provided with a guide hole 155, and the guide rod 154 is movably connected in the guide hole 155. The second fixing foot 152 is installed on the side of the movable clamping plate 151 facing the battery pack, and its shape is adapted to the structure of the other side wall of the battery pack. During operation, after one side of the battery pack is initially attached to the first clamping member 14, the adjusting drive component 153 is activated, driving the movable clamping plate 151 to move the second fixing foot 152 toward the battery pack until the second fixing foot 152 tightly clamps the other side wall of the battery pack.

[0047] In this embodiment, preferably, an inner sleeve 25 is provided inside the connecting cover 22. The inner sleeve 25 is fixedly installed inside the connecting cover 22. An annular groove 251 is provided on the outer side wall of the inner sleeve 25. An annular groove opposite to the annular groove 251 is provided on the connecting cover 22. The annular groove and the annular groove 251 are connected to form an annular cavity. The annular cavity provides space for the installation of the annular spring 28 and also provides space for the movement of the radial block 262. An annular spring 28 is provided inside the annular groove 251. A plurality of radial openings 252 are provided on the side wall of the inner sleeve 25. The plurality of radial openings 252 are arranged sequentially at intervals along the circumference of the inner sleeve 25. The radial openings 252 are connected to the annular groove 251.

[0048] The annular elastic sleeve 27 is provided with a plurality of radial connectors 26 along its circumference. The plurality of radial connectors 26 are arranged sequentially at intervals along the circumference of the annular elastic sleeve 27. The annular elastic sleeve 27 is elastic and can expand radially. The radial connectors 26 include an arc-shaped plate 261 and a radial block 262 disposed on the arc-shaped plate 261. The arc-shaped plate 261 is fixedly connected to the inner bushing, and the radial block 262 is slidably connected in the radial opening 252. An arc-shaped groove for mounting the annular spring 28 is provided on the side away from the arc-shaped plate 261. The annular elastic sleeve 27 is an annular elastic element. Thus, during the installation process, the connecting sleeve and the inner sleeve 25 are sleeved on the components of the battery pack airflow channel. The radial block 262 and the annular spring 28 can make the annular elastic sleeve 27 seal on the components of the battery pack airflow channel.

[0049] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fault diagnosis device for sensors in a battery pack of a new energy vehicle, characterized in that, include: A fixing clamp (1) includes a horizontal arm (11) and a first clamping plate (12) and a second clamping plate (13) disposed on opposite sides of the horizontal arm (11). A first clamping member (14) is disposed on the first clamping plate (12), and a second clamping member (15) is disposed on the second clamping plate (13). The first clamping member (14) and the second clamping member (15) can be fixedly clamped on the side walls on both sides of the battery pack. A diagnostic component (2) includes a detection element (21) that matches the components of the airflow channel on the battery pack. Other ventilation structures on the battery pack are provided with sealing elements. The detection element (21) includes a connecting cover (22) and a gas connector (23) provided on the connecting cover (22). The end of the gas connector (23) is provided with a gas interface (231). A mounting plate (24) is provided on the cross arm (11). The connecting cover (22) is fixedly mounted on the mounting plate (24) by the mounting element. Vacuum assembly (3), the vacuum assembly (3) includes a vacuum source (31) and a gas switch (32), the vacuum source (31) is connected to the gas interface (231) through a connecting pipe (34), and a buffer (33) is provided between the vacuum source (31) and the gas interface (231); The detection probe (4) includes a connecting rod (41) and a detection rod (42). The connecting rod (41) is fixedly installed inside the connecting cover (22) and communicates with the gas connector (23). A pressure detector (43) is provided on the detection rod (42).

2. The fault diagnosis device for sensors in a new energy vehicle battery pack according to claim 1, characterized in that, The first clamping member (14) includes a first fixing foot (141) disposed on the first clamping plate (12), and there are at least two first fixing feet (141).

3. The fault diagnosis device for sensors in a new energy vehicle battery pack according to claim 1, characterized in that, The second clamping member (15) is adjustablely mounted on the second clamping plate (13). The second clamping member (15) includes a movable clamping plate (151) and a second fixed foot (152) disposed on the movable clamping plate (151). An adjustment drive member (153) is disposed on the second clamping plate (13), and the movable clamping plate (151) is connected to the adjustment drive member (153).

4. The fault diagnosis device for sensors in a new energy vehicle battery pack according to claim 1, characterized in that, The connecting cover (22) is provided with an inner sleeve (25), which is fixedly installed inside the connecting cover (22). An annular groove (251) is provided on the outer side wall of the inner sleeve (25), and an annular spring (28) is provided in the annular groove (251).

5. The fault diagnosis device for sensors in a new energy vehicle battery pack according to claim 4, characterized in that, The inner sleeve (25) has a plurality of radial openings (252) on its side wall, and the plurality of radial openings (252) are arranged sequentially at intervals along the circumference of the inner sleeve (25).

6. The fault diagnosis device for sensors in a new energy vehicle battery pack according to claim 5, characterized in that, It also includes an annular elastic sleeve (27), on which a plurality of radial connectors (26) are provided, and the plurality of radial connectors (26) are arranged sequentially at intervals along the circumference of the annular elastic sleeve (27).

7. The fault diagnosis device for sensors in a new energy vehicle battery pack according to claim 6, characterized in that, The radial connector (26) includes an arc plate (261) and a radial block (262) disposed on the arc plate (261). The arc plate (261) is fixedly connected to the annular elastic sleeve (27). The radial block (262) is slidably connected in the radial opening (252). The side of the radial block (262) away from the arc plate (261) is provided with an arc groove for the installation of the annular spring (28).

Images