A power battery bulge detection device

Abstract

The application relates to a power battery bulge detection device, and relates to the technical field of power battery detection, and aims to solve the problems of low efficiency, insufficient precision or high cost of the existing detection method. The device comprises a fixed plate, a sliding plate, a guide assembly, a first rotating rod body, a second rotating rod body and a rotating capturing assembly; the sliding plate is connected with the fixed plate through the guide assembly, can move linearly in a first direction and abuts against the wall surface of the power battery; the first rotating rod body is rotationally connected with the sliding plate and the second rotating rod body at two ends respectively, the second rotating rod body is rotationally connected with the fixed plate at the other end, and a connecting rod transmission structure is formed; the rotating capturing assembly is fixed on the fixed plate and is used for acquiring the rotation angle of the second rotating rod body. When the power battery is bulged, the sliding plate is pushed to move, the rotation is converted into the rotary motion of the second rotating rod body through the rotating rod body transmission, and the rotary angle is captured by the rotating capturing assembly, so that the bulge amount can be inversely deduced.

Description

Technical Field

[0001] This application relates to the field of power battery testing technology, and in particular to a power battery bulging detection device. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage equipment, the safety and reliability of power batteries (such as lithium-ion batteries), as core energy components, have attracted much attention. Under prolonged use or abnormal operating conditions (such as overcharging, high temperature, or internal short circuits), power batteries are prone to bulging due to electrolyte decomposition and gas expansion. Bubbling not only leads to battery capacity decay and performance degradation, but in severe cases, it can also cause safety accidents such as leakage, fire, or even explosion. Therefore, accurate and real-time detection of the bulging condition of power batteries is crucial.

[0003] Currently, the detection of bulging in power batteries mainly relies on traditional methods such as manual visual inspection and caliper measurement, which have problems such as low efficiency, strong subjectivity, and inability to monitor in real time. Some automated testing equipment relies on technologies such as laser ranging and image recognition, which are complex in structure, high in cost, and easily affected by environmental interference. Utility Model Content

[0004] This application provides a power battery bulging detection device, which solves the problems of low efficiency, insufficient accuracy or high cost of existing detection methods.

[0005] This application provides a power battery bulge detection device, including a fixed plate, a sliding plate, a guide assembly, a first rotating rod, a second rotating rod, and a rotation capture assembly. The sliding plate is disposed on one side of the fixed plate. The guide assembly is disposed between the fixed plate and the sliding plate and is fixedly connected to the fixed plate. The sliding plate can move linearly along a first direction through the guide assembly, and the surface of the sliding plate opposite to the first direction abuts against one side wall of the power battery. One end of the first rotating rod is rotatably disposed on the sliding plate, and the first rotating rod and the power battery are respectively located on two surfaces of the sliding plate. One end of the second rotating rod is rotatably connected to the fixed plate, and the other end of the second rotating rod is rotatably connected to the other end of the first rotating rod, so that when the sliding plate moves along the first direction, the first rotating rod drives the second rotating rod to rotate around the fixed plate. The rotation capture assembly is fixedly disposed on the fixed plate and is used to obtain the rotation angle of the second rotating rod.

[0006] In this application, the fixed plate provides a fixed foundation; the sliding plate abuts against the wall of the power battery and can be displaced according to the bulging of the power battery; the guide assembly ensures that the sliding plate moves linearly along the first direction, making the movement stable and accurate; the first rotating rod and the second rotating rod form a linkage mechanism, which converts the linear motion of the sliding plate into the rotation of the second rotating rod; the rotation capture assembly is used to obtain the rotation angle of the second rotating rod, thereby indirectly knowing the displacement of the sliding plate, and thus determining whether the power battery is bulging and the degree of bulging.

[0007] The sliding plate makes surface contact with the power battery. During power battery installation, by wrapping and restricting other parts of the power battery, the bulging area of ​​the power battery can be concentrated on the part in contact with the sliding plate. Alternatively, if other parts of the power battery bulge, it will affect the sliding plate. The sliding plate drives the first rotating rod and the second rotating rod to rotate, so that the rotation capture component can detect the state of the power battery pack, achieving the need for high-precision and all-round detection.

[0008] In some embodiments of this application, the power battery bulge detection device further includes a first rotating seat and a second rotating seat. The first rotating seat is disposed between the first rotating rod and the sliding plate, and the second rotating seat is disposed between the second rotating rod and the fixed plate. The first rotating seat is fixedly connected to the sliding plate, and the second rotating seat is fixedly connected to the fixed plate.

[0009] The first rotating seat allows the first rotating rod to rotate flexibly relative to the sliding plate, and the second rotating seat allows the second rotating rod to rotate flexibly relative to the fixed plate, ensuring the normal operation of the linkage mechanism. The arrangement of the first and second rotating seats improves the stability and reliability of the rotational connection, making the mechanical structure of the entire detection device more robust and enabling it to transmit motion and force more accurately.

[0010] In some embodiments of this application, the power battery bulge detection device further includes a rotating shaft, which is rotatably disposed between a first rotating rod and a second rotating rod, so that the first rotating rod and the second rotating rod can rotate about the axis of the rotating shaft.

[0011] The first and second rotating rods can rotate around the axis of the rotating shaft, which improves the motion accuracy and flexibility of the linkage mechanism, thereby improving the detection accuracy and reliability of the entire detection device.

[0012] In some embodiments of this application, a rotating hole is provided in the second rotating seat, and a protrusion is provided in the body of the second rotating rod. The protrusion is rotatably disposed in the rotating hole. The power battery bulge detection device also includes a rotating body, which is fixedly connected to the protrusion. The rotating body is rotatably disposed on the second rotating seat, and the rotation capture component is used to capture the rotation angle of the rotating body.

[0013] By fixing the rotating body to the protrusion, the rotation capture assembly captures the rotation angle of the rotating body, so that the rotation of the second rotating rod can be transmitted to the rotating body more accurately, which facilitates the rotation capture assembly to perform precise measurement; by converting the object of rotation angle measurement into a rotating body, the accuracy and convenience of measurement are improved, and the rotation capture assembly can obtain rotation angle information more stably.

[0014] In some embodiments of this application, the rotation capture assembly includes a PCB board, a Hall chip, and a magnetic core. The Hall chip is disposed on the PCB board, the PCB board is fixedly disposed on the second rotating seat, and the magnetic core is fixedly disposed on the rotating body. The Hall chip and the magnetic core are distributed at intervals.

[0015] When the rotating body drives the magnetic core to rotate, the Hall chip can sense the change in the magnetic field of the magnetic core, thereby generating a corresponding electrical signal. By processing the electrical signal, the rotation angle of the rotating body can be obtained. This non-contact angle measurement method has the advantages of high precision, high reliability, and strong anti-interference ability. It can accurately measure the rotation angle of the rotating body and thus accurately determine the bulging condition of the power battery.

[0016] In some embodiments of this application, when the first direction is not perpendicular to the direction from which the fixed plate faces the sliding plate, the sliding plate moves closer to the fixed plate as it slides along the first direction. The relationship between the sliding plate's movement trajectory and displacement and the amount of battery bulging can be adjusted according to actual needs, enabling the detection device to adapt to the detection of power batteries of different specifications and requirements; increasing the flexibility and adaptability of the detection device, meeting the needs of power battery bulging detection under different conditions, and improving the versatility of the detection device.

[0017] In some embodiments of this application, the surface of the fixed plate is parallel to the surface of the sliding plate, and the first direction is perpendicular to the surface of the fixed plate; the guide assembly consists of two guide posts, which are spaced apart and parallel to each other, with one end of the guide post fixedly mounted on the fixed plate, and the sliding plate slidably mounted on the guide post.

[0018] By defining the parallelism of the surfaces of the fixed plate and the sliding plate, and by using two spaced and parallel guide columns as the guide components, the linear motion of the sliding plate becomes more stable and accurate, facilitating precise measurement of the sliding plate's displacement. Through a clearly defined structure and sliding direction, the structural stability and measurement accuracy of the detection device are improved, making the detection results more reliable.

[0019] In some embodiments of this application, the guide assembly further includes a sliding sleeve, which is fixedly mounted on the sliding plate and slidably connected to the guide post. The sliding sleeve reduces friction between the sliding plate and the guide post, improves the smoothness of the sliding plate's movement, and also provides guidance and positioning, further enhancing the accuracy of the sliding plate's movement.

[0020] In some embodiments of this application, the power battery bulge detection device further includes threaded components. The first rotating seat and the second rotating seat are respectively fixedly connected to the sliding plate and the fixed plate via the threaded components. Threaded connections have advantages such as convenient installation and strong connection, which can ensure the connection stability between the rotating seat and the fixed plate and the sliding plate, thereby ensuring the normal operation of the linkage mechanism.

[0021] In some embodiments of this application, the threaded component connecting the first rotating seat passes through the sliding plate and is fixedly connected to the wall plate of the power battery, so that the sliding plate is relatively fixed to the power battery. The relative fixation of the sliding plate to the power battery ensures that the sliding plate can accurately follow the bulging deformation of the power battery to generate displacement, improving the detection accuracy and reliability of the detection device. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0023] Figure 1 This is a schematic diagram of a power battery bulge detection device provided in an embodiment of this application.

[0024] Figure 2 This is one of the front views of a power battery bulge detection device provided in an embodiment of this application.

[0025] Figure 3 This is a rear view of a power battery bulge detection device provided in an embodiment of this application.

[0026] Figure 4 This is one of the partial schematic diagrams of a power battery bulge detection device provided in an embodiment of this application.

[0027] Figure 5 A power battery bulge detection device provided in this application embodiment Figure 4 The right view.

[0028] Figure 6 This is a second partial schematic diagram of a power battery bulge detection device provided in an embodiment of this application.

[0029] Figure 7 This is a schematic diagram showing different positions of a power battery bulge detection device provided in an embodiment of this application.

[0030] Figure 8 This is a second front view of a power battery bulge detection device provided in an embodiment of this application.

[0031] Reference numerals: 1-Fixed plate; 11-First direction; 2-Sliding plate; 3-Guide assembly; 31-Guide post; 4-First rotating rod; 41-First rotating seat; 5-Second rotating rod; 51-Second rotating seat; 511-Arc groove; 52-Rotation shaft; 53-Protrusion; 6-Rotation capture assembly; 61-Magnetic core; 7-Rotating body; 8-Threaded part. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment 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 indicator will also change accordingly.

[0034] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0036] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0037] A power battery bulging detection device, please refer to Figure 1It includes a fixed plate 1, a sliding plate 2, a guide assembly 3, a first rotating rod 4, a second rotating rod 5, and a rotating capture assembly 6.

[0038] Please refer to Figure 1 The fixing plate 1 is the basic load-bearing structure of the device. It can be made of high-strength metal materials, such as aluminum alloy or steel. Its shape can be a rectangular flat plate to stably install other components, or it can be another component with an installation cavity or space, which can also serve the purpose of fixing, supporting, and positioning. One side of the fixing plate 1 can remain flat, providing a stable reference surface for the subsequent installation of other components. The fixing plate 1 can be installed on one side of the bottom, side, or top surface of the power battery installation area, and a gap can be set between it and the power battery to facilitate the installation of other components.

[0039] Please refer to Figure 1 The sliding plate 2 is set on one side of the fixed plate 1 and is used to abut against the side wall of the power battery. The material of the sliding plate 2 can be the same metal material as the fixed plate 1, or high-strength plastic can be selected according to actual needs. The shape can also be rectangular, and the plate surface can maintain a certain positional relationship with the plate surface of the fixed plate 1, such as being parallel, inclined, or perpendicular.

[0040] Please refer to Figure 2 The guide component 3 is disposed between the fixed plate 1 and the sliding plate 2. The guide component 3 is fixedly connected to the fixed plate 1. The sliding plate 2 can move linearly along the first direction 11 through the guide component 3. The plate surface of the sliding plate 2 in the opposite direction of the first direction 11 abuts against one side wall of the power battery.

[0041] Please refer to Figure 2 The guide component 3 is located between the fixed plate 1 and the sliding plate 2, and can guide the sliding plate 2 to move linearly along the first direction 11. The guide component 3 can be made of metal, such as stainless steel, to ensure sufficient hardness and wear resistance.

[0042] The guide component 3 can be a guide post 31, which can be cylindrical or prismatic in shape, and its surface is smoothed to reduce friction during sliding. The sliding plate 2 slides through the guide component 3. For example, the sliding plate 2 is provided with a hole or sliding sleeve that mates with the guide post 31. The guide post 31 passes through these structures, allowing the sliding plate 2 to slide smoothly along the axial direction of the guide post 31, i.e., the first direction 11.

[0043] Please refer to Figure 2For example, the first direction 11 should be the bulge direction of the power battery, that is, the direction of displacement caused by the protrusion between the power battery and the contact surface of the sliding plate 2, which is perpendicular to the sliding plate 2. Therefore, the first direction 11 is the normal direction of the contact plane between the sliding plate 2 and the battery pack of the power battery. At this time, the surface of the sliding plate 2 away from the power battery can be a plane or an arc surface. At this time, the relationship between the first direction 11 and the fixed plate 1 can be a direction close to the fixed plate 1 or a direction parallel to one side of the fixed plate 1. It needs to be designed and determined according to the installation position relationship between the fixed plate 1 and the sliding plate 2.

[0044] Please refer to Figure 2 One end of the first rotating rod 4 is rotatably mounted on the sliding plate 2, and the first rotating rod 4 and the power battery are respectively located on the two plates of the sliding plate 2. The material of the first rotating rod 4 can be metal, such as iron or aluminum alloy, and its shape can be a long rod. Its length and thickness need to be designed according to the overall size of the device and the stress conditions.

[0045] The connection between the first rotating rod 4 and the sliding plate 2 can be achieved by a rotating seat. The rotating seat is fixed on the sliding plate 2, and the end of the first rotating rod 4 is rotatably connected to the rotating seat by means of a pin, hinge, etc., so that the first rotating rod 4 can rotate flexibly around the connection point.

[0046] Please refer to Figure 2 One end of the second rotating rod 5 is rotatably connected to the fixed plate 1, and the other end of the second rotating rod 5 is rotatably connected to the other end of the first rotating rod 4, so that when the sliding plate 2 moves along the first direction 11, the first rotating rod 4 drives the second rotating rod 5 to rotate around the fixed plate 1.

[0047] Please refer to Figure 2 The material of the second rotating rod 5 can be the same as or similar to that of the first rotating rod 4, and its shape can also be a long strip rod. The length needs to match the overall layout of the first rotating rod 4 and the device. The connection between the second rotating rod 5 and the fixed plate 1 can also be achieved through a rotating seat. The rotating seat is fixed on the fixed plate 1, and the end of the second rotating rod 5 is rotatably connected to the rotating seat.

[0048] Please refer to Figure 2 The rotational connection between the first rotating rod 4 and the second rotating rod 5 can be achieved through a rotating shaft 52, which passes through the ends of both rods, allowing them to rotate relative to each other around the axis of the rotating shaft 52. When the sliding plate 2 moves along the first direction 11, it will drive the first rotating rod 4 to move, which in turn will cause the first rotating rod 4 to drive the second rotating rod 5 to rotate around the connection point on the fixed plate 1.

[0049] Please refer to Figure 2In order to ensure that the rotational relationship between the first rotating rod 4 and the second rotating rod 5 is stable when the sliding plate 2 moves along the first direction 11, the initial positions of the first rotating rod 4 and the second rotating rod 5 can be made to have an angle, for example, the initial angle is 60° and the maximum rotation angle is 15°. That is, when the first rotating rod 4 moves, the angle between the first rotating rod 4 and the second rotating rod 5 will decrease, thereby stabilizing the rotational relationship between the first rotating rod 4 and the second rotating rod 5.

[0050] Please refer to Figure 3 The rotation capture component 6 is fixedly mounted on the fixed plate 1. The rotation capture component 6 is used to obtain the rotation angle of the second rotating rod 5. The rotation capture component 6 may be composed of a PCB board, a Hall chip, and a magnetic core 61. The PCB board is a rigid circuit board and is fixed on the second rotating seat 51. The Hall chip is mounted on the PCB board and is used to sense changes in the magnetic field. The magnetic core 61 is fixed on the rotating body 7, which rotates synchronously with the second rotating rod 5, and rotates together with the second rotating rod 5.

[0051] Hall chips and magnetic core 61 are distributed at intervals. When magnetic core 61 rotates, the magnetic field sensed by the Hall chip changes, thereby generating a corresponding electrical signal. The rotation angle of the second rotating rod 5 can be obtained by processing the electrical signal.

[0052] Alternatively, the rotation capture component 6 can also use an angle sensor or a pressure sensor to detect the angle or displacement of the second rotating rod 5 by means of the angle change or the pressure change caused by the second rotating rod 5, thereby determining the bulging state of the power battery.

[0053] Please refer to the following: Figure 1-3 In this application, the fixed plate 1 provides a fixed foundation; the sliding plate 2 abuts against the wall of the power battery and can be displaced according to the bulging of the power battery; the guide component 3 ensures that the sliding plate 2 moves linearly along the first direction 11, so that the movement has stability and accuracy; the first rotating rod 4 and the second rotating rod 5 form a linkage mechanism, which converts the linear movement of the sliding plate 2 into the rotation of the second rotating rod 5; the rotation capture component 6 is used to obtain the rotation angle of the second rotating rod 5, thereby indirectly knowing the displacement of the sliding plate 2, and thus determining whether the power battery is bulging and the degree of bulging.

[0054] The sliding plate 2 is in surface contact with the power battery. When the power battery is installed, by wrapping and restricting other parts of the power battery, the bulging area of ​​the power battery can be concentrated on the part in contact with the sliding plate 2. Alternatively, if other parts of the power battery bulge, it will affect the sliding plate 2. The sliding plate 2 drives the first rotating rod and the second rotating rod to rotate, so that the rotation capture component 6 can detect the state of the power battery pack, thus achieving the need for high-precision and all-round detection.

[0055] For example, when the structure is installed at the bottom of the power battery and the fixed plate 1 and the sliding plate 2 are parallel, the sliding plate 2 will deviate due to its own weight. At this time, the power battery is fixed in a designated area of ​​the vehicle. The sliding plate 2 can be fixedly connected to part of the outer shell of the power battery, for example, by using welding points or threaded structures to achieve fixation, thereby avoiding the angle change caused by the weight of the sliding plate 2 and the first rotating rod 4. Alternatively, a spring can be added between the first rotating rod 4 and the second rotating rod 5 to stabilize its initial state.

[0056] Please continue to refer to Figure 3 In some examples, the power battery bulge detection device also includes a first rotating seat 41 and a second rotating seat 51. The first rotating seat 41 is disposed between the first rotating rod 4 and the sliding plate 2, and the second rotating seat 51 is disposed between the second rotating rod 5 and the fixed plate 1. The first rotating seat 41 is fixedly connected to the sliding plate 2, and the second rotating seat 51 is fixedly connected to the fixed plate 1.

[0057] Please refer to Figure 3 The first rotating seat 41 enables the first rotating rod 4 to rotate flexibly relative to the sliding plate 2, and the second rotating seat 51 enables the second rotating rod 5 to rotate flexibly relative to the fixed plate 1, ensuring the normal operation of the linkage mechanism. The arrangement of the first rotating seat 41 and the second rotating seat 51 improves the stability and reliability of the rotating connection, making the mechanical structure of the entire detection device more stable and enabling it to transmit motion and force more accurately.

[0058] Please refer to Figure 3 For example, the core function of the first rotating seat 41 and the second rotating seat 51 is to provide a stable rotation fulcrum for the rotating rod, avoid wear or loosening of the connection caused by the rotating rod directly contacting the sliding plate 2 and the fixed plate 1, and at the same time ensure the accuracy of the rotation direction. Therefore, the first rotating seat 41 and the second rotating seat 51 can be hinge seats or structures with rotation space.

[0059] Please refer to Figure 3 The first and second rotating actions can be made of metal or non-metal materials; the first rotating rod 4 and the second rotating rod 5 installed in the first rotating seat 41 and the second rotating seat 51 have the same rotation direction, and should be the same as the rotation direction between the first rotating rod 4 and the second rotating rod 5, that is, the axes of the first rotating rod 4 and the second rotating rod 5 rotate in the same plane.

[0060] Please refer to Figure 3The first rotating seat 41 is located between the first rotating rod 4 and the sliding plate 2. One side of the first rotating seat 41 is fixed to the sliding plate 2, and the other side is rotatably connected to the end of the first rotating rod 4 (e.g., through a hole through which a pin passes). The second rotating seat 51 is located between the second rotating rod 5 and the fixed plate 1, and its function is similar to that of the first rotating seat 41. One side of the second rotating seat 51 is fixed to the fixed plate 1, and the other side is rotatably connected to the end of the second rotating rod 5.

[0061] Please refer to Figure 4 In some examples, the power battery bulge detection device also includes a rotating shaft 52, which is rotatably disposed between the first rotating rod 4 and the second rotating rod 5, so that the first rotating rod 4 and the second rotating rod 5 can rotate about the axis of the rotating shaft 52.

[0062] Please refer to Figure 4 The first rotating rod 4 and the second rotating rod 5 can rotate around the axis of the rotating shaft 52, which improves the motion accuracy and flexibility of the linkage mechanism, thereby improving the detection accuracy and reliability of the entire detection device.

[0063] Please refer to Figure 4 For example, the function of the rotating shaft 52 is to realize the "hinge" between the first rotating rod 4 and the second rotating rod 5, so that the two can rotate relative to each other, thereby converting the linear motion of the sliding plate 2 into the rotational motion of the second rotating rod 5.

[0064] The rotating shaft 52 must pass through the ends of both the first rotating rod 4 and the second rotating rod 5, forming a clearance fit with both (i.e., the shaft can rotate freely, and the rods rotate around the shaft). For example, the rotating shaft 52 can be made of 45# steel, with shoulders at both ends for restraint; through holes are opened at the connecting ends of the first rotating rod 4 and the second rotating rod 5, and after the rotating shaft 52 passes through the through holes, both ends are fixed with snap rings to ensure that the rods can rotate around the shaft without axial movement.

[0065] At this time, the first rotating rod 4 and the second rotating rod 5 can be misaligned and fitted at their ends, or the end of the first rotating rod 4 or the second rotating rod 5 can form a protrusion, and the other end can form a depression, with the protrusion extending into the depression, so that the rotating shaft 52 passes through this part of the structure to achieve the rotational connection between the two.

[0066] Please refer to Figure 4 Alternatively, the rotating shaft 52 can be formed on the first rotating rod 4 or the second rotating rod 5, and a through hole can be opened on the other of the first rotating rod 4 or the second rotating rod 5 so that the rotating shaft 52 passes through the through hole to achieve the effect of rotational connection.

[0067] Please refer to Figure 5In some examples, the second rotating seat 51 is provided with a rotating hole, and the second rotating rod body 5 is provided with a protrusion 53. The protrusion 53 is rotatably disposed in the rotating hole. The power battery bulging detection device also includes a rotating body 7, which is fixedly connected to the protrusion 53. The rotating body 7 is rotatably disposed on the second rotating seat 51, and the rotation capture component 6 is used to capture the rotation angle of the rotating body 7.

[0068] Please refer to Figure 5 The rotating body 7 is fixedly connected to the protrusion 53, and the rotation capture assembly 6 captures the rotation angle of the rotating body 7, so that the rotation of the second rotating rod 5 can be transmitted to the rotating body 7 more accurately, which facilitates the rotation capture assembly 6 to perform precise measurement; by converting the object of rotation angle measurement to the rotating body 7, the accuracy and convenience of measurement are improved, and the rotation capture assembly 6 can obtain rotation angle information more stably.

[0069] Please refer to Figure 5 For example, the cooperation between the rotating hole and the protrusion 53 is a specific structure for the second rotating rod 5 and the second rotating seat 51 to form a rotating connection. The rotating hole is a fixed "track" and the protrusion 53 is a rotatable "axis" to ensure that the second rotating rod 5 rotates around a fixed axis.

[0070] For example, a rotating hole (with a smooth inner wall) is opened in the center of the second rotating seat 51, and a cylindrical protrusion 53 is integrally formed at the end of the second rotating rod 5. After the protrusion 53 is inserted into the rotating hole, the two are fitted together with a clearance to achieve smooth rotation.

[0071] Please refer to Figure 6 In some examples, the function of the rotating body 7 is to "transmit" the rotational motion of the second rotating rod 5 to the rotation capture assembly 6. For example, the rotating body 7 is a circular plastic disc that fits tightly onto the end of the protrusion 53 (coaxial with the protrusion 53) and rotates synchronously with the protrusion 53. The rotating body 7 has evenly distributed toothed structures or a magnetic core 61 installed on its edge to facilitate the rotation capture assembly 6 in identifying angle changes. By monitoring the rotation angle of the rotating body 7, the rotation capture assembly 6 indirectly obtains the rotation angle of the second rotating rod 5, and ultimately deduces the displacement of the sliding plate 2 (i.e., the amount of battery bulging).

[0072] Please refer to Figure 6 For example, a specific cavity can be provided in the second rotating seat 51 to accommodate the rotating body 7, such as an arc groove 511, to limit the maximum rotation angle of the rotating body 7. At this time, the rotating body 7 and the second rotating rod body 5 can be located on two opposite side walls of the second rotating seat 51.

[0073] In some examples, the rotation capture assembly 6 includes a PCB board, a Hall chip, and a magnetic core 61. The Hall chip is disposed on the PCB board, which is fixedly disposed on the second rotating seat 51. The magnetic core 61 is fixedly disposed on the rotating body 7, and the Hall chip and the magnetic core 61 are distributed at intervals.

[0074] When the rotating body 7 drives the magnetic core 61 to rotate, the Hall chip can sense the change in the magnetic field of the magnetic core 61, thereby generating a corresponding electrical signal. By processing the electrical signal, the rotation angle of the rotating body 7 can be obtained. This non-contact angle measurement method has the advantages of high precision, high reliability, and strong anti-interference ability. It can accurately measure the rotation angle of the rotating body 7, and thus accurately determine the bulging condition of the power battery.

[0075] For example, this component utilizes the Hall effect to achieve non-contact angle detection, which features high accuracy and long lifespan; when the magnetic core 61 rotates with the rotating body 7, the direction of the magnetic field changes, the Hall chip senses the change in the magnetic field and outputs an electrical signal, and the PCB board processes the signal to obtain the rotation angle.

[0076] The PCB board serves as the circuit carrier and is fixed to the second rotating seat 51 (e.g., with double-sided tape or screws) to ensure a stable relative position with the rotating body 7. For example, the PCB board can be made of FR-4 material, with resistors, capacitors, and other components soldered to its surface to form a signal processing circuit.

[0077] The Hall chip can be a linear Hall sensor, which is soldered onto the side of the PCB board facing the rotating body 7 to sense changes in the magnetic field.

[0078] The magnetic core 61 is a permanent magnet (such as neodymium iron boron), which can be cylindrical or disc-shaped. It is fixed to the edge of the rotating body 7 with glue. The magnetic core 61 can be coaxial with the rotating body 7 or not. The magnetic core 61 and the Hall chip are kept at a distance of 1-2mm (too close and it will saturate; too far and the signal will be weak). When the rotating body 7 rotates, the N / S poles of the magnetic core 61 alternately pass through the Hall chip, and the chip outputs a periodic voltage signal. The rotation angle can be obtained by calculating the signal period.

[0079] Please refer to Figure 7 In some examples, when the first direction 11 is not perpendicular to the direction of the fixed plate 1 toward the sliding plate 2, the sliding plate 2 moves closer to the fixed plate 1 as it slides along the first direction 11. The relationship between the movement trajectory and displacement of the sliding plate 2 and the bulge of the power battery can be adjusted according to actual needs, enabling the detection device to adapt to the detection of power batteries of different specifications and requirements; increasing the flexibility and adaptability of the detection device, meeting the power battery bulge detection needs under different conditions, and improving the versatility of the detection device.

[0080] For example, "first direction 11" is the direction of movement of the sliding plate 2, and "direction of the fixed plate 1 toward the sliding plate 2" is the direction of the shortest distance between the two plates (which can be a perpendicular direction). When the first direction 11 is not perpendicular to this direction (i.e. the sliding plate 2 moves obliquely), its trajectory has a displacement in the direction "closer to the fixed plate 1", which ultimately reduces the distance between the sliding plate 2 and the fixed plate 1.

[0081] This design is suitable for scenarios where the direction of the battery swelling is not perpendicular to the board surface (such as when the installation area at the bottom of the battery is limited, the detection part of the structure can be installed on the side).

[0082] Please refer to Figure 8 In some examples, the surface of the fixed plate 1 is parallel to the surface of the sliding plate 2, and the first direction 11 is perpendicular to the surface of the fixed plate 1; the guide assembly 3 consists of two guide posts 31, which are spaced apart and parallel to each other. One end of the guide post 31 is fixedly mounted on the fixed plate 1, and the sliding plate 2 is slidably mounted on the guide post 31.

[0083] Please refer to Figure 8 The fixed plate 1 and the sliding plate 2 are parallel, and the guide component 3 consists of two spaced and parallel guide columns 31, which makes the linear movement of the sliding plate 2 more stable and accurate, and facilitates the accurate measurement of the displacement of the sliding plate 2. Through the clear structure and sliding direction, the structural stability and measurement accuracy of the detection device are improved, making the detection results more reliable.

[0084] For example, the plates are parallel and the first direction 11 is perpendicular to the plates, which means that the sliding plate 2 performs "translation" (without tilting), ensuring that the contact with the battery wall is always uniform. This is suitable for scenarios where the direction of the battery bulge is perpendicular to one side of its wall. For example, both the fixed plate 1 and the sliding plate 2 are rectangular aluminum plates with parallel surfaces, and the first direction 11 is the up-down direction perpendicular to the plates.

[0085] Please refer to Figure 8 The function of the two guide posts 31 is to limit the movement direction of the sliding plate 2 (only along the first direction 11) and prevent it from deviating. For example, the guide posts 31 are made of stainless steel, with two posts spaced apart and parallel to each other. One end is fixed to the center of the fixed plate 1 by welding, and the other end passes through the through hole on the sliding plate 2. The sliding plate 2 can slide freely along the posts to ensure accurate movement direction.

[0086] In some examples, the guide assembly 3 also includes a sliding sleeve, which is fixedly mounted on the sliding plate 2 and slidably connected to the guide post 31. The sliding sleeve reduces friction between the sliding plate 2 and the guide post 31, improves the smoothness of sliding of the sliding plate 2, and also plays a certain guiding and positioning role, further improving the accuracy of the movement of the sliding plate 2.

[0087] For example, the function of the sliding sleeve is to reduce direct friction between the sliding plate 2 and the guide post 31 (to avoid wear) and to improve the smoothness of sliding through its own lubrication. For example, the sliding sleeve is made of polytetrafluoroethylene and is cylindrical. It is pressed into the through hole of the sliding plate 2 by interference fit and forms a clearance fit (0.1mm) with the stainless steel guide post 31. This makes the resistance of the sliding plate 2 less when it moves along the guide post 31 and avoids abnormal noise caused by hard contact between metals.

[0088] Please refer to Figure 8 In some examples, the power battery bulge detection device also includes a threaded component 8. The first rotating seat 41 and the second rotating seat 51 are fixedly connected to the sliding plate 2 and the fixed plate 1 respectively via the threaded component 8. The threaded connection has the advantages of convenient installation and firm connection, which can ensure the connection stability between the rotating seat and the fixed plate 1 and the sliding plate 2, thereby ensuring the normal operation of the linkage mechanism.

[0089] Please refer to Figure 8 In some examples, the advantage of threaded components 8 (such as screws and bolts) is that they are detachable, facilitating assembly, maintenance, and component replacement of the device. For example, the connection between the first rotating seat 41 and the sliding plate 2: threaded holes are pre-drilled on the sliding plate 2, and a through hole is opened at the corresponding position on the first rotating seat 41. A Phillips head screw is passed through the through hole and screwed into the threaded hole to achieve fixation. The connection between the second rotating seat 51 and the fixed plate 1: a nut is welded on the fixed plate 1, and a through hole is opened on the second rotating seat 51. An internal hex bolt is passed through the through hole and screwed into the nut, leaving a portion of the bolt exposed after fixation.

[0090] Please refer to Figure 8 In some examples, the threaded part 8 connecting the first rotating seat 41 passes through the sliding plate 2 and is fixedly connected to the wall plate of the power battery, so that the sliding plate 2 is relatively fixed to the power battery. The relative fixation of the sliding plate 2 to the power battery can ensure that the sliding plate 2 can accurately follow the bulging deformation of the power battery to generate displacement, thereby improving the detection accuracy and reliability of the detection device.

[0091] In some examples, when the battery bulges, the sliding plate 2 can be directly pushed (without relative displacement), avoiding detection errors caused by the gap between the two. For example, the threaded part 8 connecting the first rotating seat 41 is a countersunk screw, which passes through the through hole of the first rotating seat 41 and the through hole of the sliding plate 2 in sequence, and is finally screwed into the threaded hole on the side wall of the power battery (pre-reserved on the battery housing). The screw head is recessed into the countersunk hole of the first rotating seat 41 (flush with the seat surface). At this time, the sliding plate 2 is rigidly connected to the battery through the screw. When the battery bulges, it will directly drive the sliding plate 2 to move along the first direction 11, ensuring the accuracy of the detection.

[0092] This application provides an embodiment one; please refer to the previous section. Figures 1-3The power battery bulging detection device of this embodiment includes a fixed plate 1, a sliding plate 2, a guide assembly 3, a first rotating rod 4, a second rotating rod 5, a rotation capture assembly 6, a first rotating seat 41, a second rotating seat 51, a rotating shaft 52, a sliding sleeve, and a threaded component 8.

[0093] The fixed plate 1 is made of aluminum alloy and is a rectangular flat plate with a flat surface. The sliding plate 2 is also rectangular and made of high-strength plastic. It is set on one side of the fixed plate 1, and its surface is parallel to the surface of the fixed plate 1.

[0094] The guide assembly 3 consists of two cylindrical stainless steel guide posts 31 with smooth surfaces. The two guide posts 31 are spaced apart and parallel to each other, with one end fixed to the fixed plate 1 by welding. A sliding sleeve is fixed on the sliding plate 2. The sliding sleeve is made of copper and is cylindrical. The sliding sleeve is slidably connected to the guide posts 31, allowing the sliding plate 2 to move linearly along the axis of the guide posts 31, that is, in a first direction 11 perpendicular to the surface of the fixed plate 1. The surface of the sliding plate 2 opposite to the first direction 11 abuts against one side wall of the power battery.

[0095] The first rotating rod 4 is a long, strip-shaped iron rod, with one end connected to the sliding plate 2 via a first rotating seat 41. The first rotating seat 41 is a metal block structure, fixed to the sliding plate 2 by screws (threaded parts 8). The end of the first rotating rod 4 is rotatably connected to the first rotating seat 41 via a pin, and the first rotating rod 4 and the power battery are located on two separate surfaces of the sliding plate 2. The screws connecting the first rotating seat 41 pass through the sliding plate 2 and are fixedly connected to the wall panel of the power battery, thus fixing the sliding plate 2 and the power battery relatively to each other.

[0096] The second rotating rod 5 is a long, narrow aluminum alloy rod. One end is connected to the fixed plate 1 via a second rotating seat 51, which is a metal block structure fixed to the fixed plate 1 by screws (threaded parts 8). The other end of the second rotating rod 5 is rotatably connected to the other end of the first rotating rod 4 via a rotating shaft 52. The rotating shaft 52 is a cylindrical steel shaft, rotatably positioned between the first rotating rod 4 and the second rotating rod 5, allowing both to rotate around the axis of the rotating shaft 52. When the sliding plate 2 moves along the first direction 11, the first rotating rod 4 drives the second rotating rod 5 to rotate around the second rotating seat 51 on the fixed plate 1.

[0097] The second rotating seat 51 has a rotating hole, and the second rotating rod 5 has a protrusion 53, which is cylindrical and rotatably mounted within the rotating hole. The rotating body 7 is a circular metal sheet, fixedly connected to the protrusion 53, and rotatably mounted on the second rotating seat 51. The rotation capture assembly 6 includes a PCB board, a Hall chip, and a magnetic core 61. The PCB board is a rigid circuit board, fixedly mounted on the second rotating seat 51. The Hall chip is mounted on the PCB board, and the magnetic core 61 is fixedly mounted on the rotating body 7. The Hall chip and the magnetic core 61 are spaced apart to capture the rotation angle of the rotating body 7, thereby obtaining the rotation angle of the second rotating rod 5.

[0098] This application provides a second embodiment of the power battery bulging detection device, which includes a fixed plate 1, a sliding plate 2, a guide assembly 3, a first rotating rod 4, a second rotating rod 5, a rotation capture assembly 6, a first rotating seat 41, a second rotating seat 51, a rotating shaft 52, and a threaded component 8.

[0099] The fixed plate 1 is made of steel and is a rectangular flat plate. The sliding plate 2 is rectangular and made of aluminum alloy. It is set on one side of the fixed plate 1. Its surface is not parallel to the surface of the fixed plate 1. The first direction 11 is not perpendicular to the direction of the fixed plate 1 toward the sliding plate 2. When the sliding plate 2 slides along the first direction 11, it will approach the fixed plate 1.

[0100] The guide assembly 3 consists of two steel guide posts 31, which are prismatic in shape and spaced apart, with one end fixed to the fixed plate 1 by screws. The sliding plate 2 has holes that mate with the guide posts 31. The sliding plate 2 is slidably mounted on the guide posts 31 through these holes and moves linearly along the first direction 11. The side of the sliding plate 2 opposite to the first direction 11 abuts against one side wall of the power battery.

[0101] The first rotating rod 4 is a long strip of aluminum alloy, with one end connected to the sliding plate 2 via the first rotating seat 41. The first rotating seat 41 is a metal block, fixed to the sliding plate 2 by bolts (threaded parts 8). The end of the first rotating rod 4 is rotatably connected to the first rotating seat 41 and is located on the side of the sliding plate 2 away from the power battery.

[0102] The second rotating rod 5 is a long, iron rod. One end is connected to the fixed plate 1 via a second rotating seat 51, which is a metal block fixed to the fixed plate 1 by bolts (threaded parts 8). The other end of the second rotating rod 5 is rotatably connected to the other end of the first rotating rod 4 via a rotating shaft 52, which is made of steel, allowing the two to rotate relative to each other. When the sliding plate 2 moves along the first direction 11, the first rotating rod 4 drives the second rotating rod 5 to rotate around the second rotating seat 51.

[0103] The second rotating seat 51 has a rotating hole, and the protrusion 53 (cylindrical) of the second rotating rod 5 is rotatably disposed in the rotating hole. The rotating body 7 is fixedly connected to the protrusion 53 and is rotatably disposed on the second rotating seat 51. The PCB board of the rotation capture assembly 6 is fixed on the second rotating seat 51, the Hall chip is disposed on the PCB board, and the magnetic core 61 is fixed on the rotating body 7. The two are distributed at intervals to obtain the rotation angle of the second rotating rod 5.

[0104] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0105] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power battery bulging detection device, characterized in that, include: Fixing plate; A sliding plate is disposed on one side of the fixed plate; A guide assembly is disposed between the fixed plate and the sliding plate. The guide assembly is fixedly connected to the fixed plate. The sliding plate can move linearly along a first direction through the guide assembly. The plate surface of the sliding plate opposite to the first direction abuts against one side wall of the power battery. The first rotating rod has one end rotatably mounted on the sliding plate, and the first rotating rod and the power battery are respectively located on the two plates of the sliding plate; The second rotating rod has one end rotatably connected to the fixed plate, and the other end rotatably connected to the other end of the first rotating rod, so that when the sliding plate moves in the first direction, the first rotating rod drives the second rotating rod to rotate around the fixed plate. A rotation capture assembly is fixedly mounted on the fixed plate, and the rotation capture assembly is used to obtain the rotation angle of the second rotating rod.

2. The power battery bulging detection device according to claim 1, characterized in that, The power battery bulge detection device further includes a first rotating seat and a second rotating seat. The first rotating seat is disposed between the first rotating rod and the sliding plate, and the second rotating seat is disposed between the second rotating rod and the fixed plate. The first rotating seat is fixedly connected to the sliding plate, and the second rotating seat is fixedly connected to the fixed plate.

3. The power battery bulge detection device according to claim 2, characterized in that, The power battery bulge detection device further includes a rotating shaft, which is rotatably disposed between the first rotating rod and the second rotating rod, so that the first rotating rod and the second rotating rod can rotate around the axis of the rotating shaft.

4. The power battery bulge detection device according to claim 2, characterized in that, The second rotating seat has a rotating hole, and the second rotating rod has a protrusion that is rotatably disposed within the rotating hole. The power battery bulge detection device also includes a rotating body, which is fixedly connected to the protrusion. The rotating body is rotatably mounted on the second rotating seat, and the rotation capture component is used to capture the rotation angle of the rotating body.

5. The power battery bulge detection device according to claim 4, characterized in that, The rotation capture assembly includes a PCB board, a Hall chip, and a magnetic core. The Hall chip is disposed on the PCB board, the PCB board is fixedly disposed on the second rotating seat, and the magnetic core is fixedly disposed on the rotating body. The Hall chip and the magnetic core are distributed at intervals.

6. The power battery bulging detection device according to any one of claims 1 to 5, characterized in that, When the first direction is not perpendicular to the direction of the fixed plate toward the sliding plate, the sliding plate moves closer to the fixed plate when it slides along the first direction.

7. The power battery bulging detection device according to any one of claims 1 to 5, characterized in that, The surface of the fixed plate is parallel to the surface of the sliding plate, and the first direction is a direction perpendicular to the surface of the fixed plate; The guiding component consists of two guide posts, which are spaced apart and parallel to each other. One end of each guide post is fixedly mounted on the fixed plate, and the sliding plate is slidably mounted on the guide post.

8. The power battery bulge detection device according to claim 7, characterized in that, The guide assembly further includes a sliding sleeve, which is fixedly mounted on the sliding plate and slidably connected to the guide post.

9. The power battery bulge detection device according to claim 2, characterized in that, The power battery bulge detection device also includes a threaded component, and the first rotating seat and the second rotating seat are fixedly connected to the sliding plate and the fixed plate respectively through the threaded component.

10. The power battery bulge detection device according to claim 9, characterized in that, The threaded component connecting the first rotating seat passes through the sliding plate and is fixedly connected to the wall plate of the power battery, so that the sliding plate is fixed relative to the power battery.

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