A battery bulging detection device

Abstract

The utility model relates to battery detection technical field discloses a kind of battery swelling detection device, including support and transmission part, transmission part is rotatably connected with support, transmission part has oppositely arranged first end and second end, first end extends to the bottom of battery to be measured, first conducting part is located at second end, second conducting part is located at the opposite position of first conducting part along the moving path of second end, when first conducting part and second conducting part contact, to be conducted circuit is conducted, the utility model can quickly identify battery swelling condition, eliminates the error of artificial detection, the device can timely find that battery exists swelling condition in testing, can judge swelling degree by the position change of first conducting part and indicating part in testing process, and effectively test and discriminate for swelling parameter, effectively improve battery test efficiency, and battery test swelling identification sensitivity.

Description

Technical Field

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

[0002] With the rapid development of the lithium-ion battery automotive industry, the demand for large cylindrical lithium-ion batteries has surged. In the early stages of research and development and testing, timely identification of battery swelling is crucial. This can accurately pinpoint the root cause of the problem, such as excessive volume expansion rate of the positive electrode material, unreasonable electrode compaction density, or insufficient compatibility of the electrolyte formula, and then optimize the technical solution accordingly. However, current methods for detecting bulging in cylindrical battery R&D testing still rely on manual operation, which is difficult to verify. On the one hand, manual methods depend on personal experience and subjective judgment, making it difficult to guarantee the consistency of test results and prone to missed or incorrect detections. On the other hand, battery bulging often occurs dynamically during charge-discharge cycles, and manual detection can only be completed through intermittent sampling, which cannot cover the entire testing process, achieve real-time monitoring, or capture the timing and evolution of bulging, potentially missing early micro-bulging signals. Therefore, there is an urgent need to develop technologies for identifying bulging in lithium-ion batteries. Utility Model Content

[0003] The purpose of this invention is to provide a battery swelling detection device to solve the problems in the prior art. It can determine the degree of swelling in a timely manner during the testing process and effectively test and identify the swelling parameters.

[0004] This utility model provides a battery bulging detection device, comprising: Base; A mounting bracket, disposed on the base, is used to support the battery to be tested; A transmission assembly includes a support member and a transmission member. The support member is disposed on the base, and the transmission member is rotatably connected to the support member. The transmission member has a first end and a second end disposed opposite to each other, and the first end extends to the bottom of the battery under test. The conductive component includes a first conductive element and a second conductive element, wherein the first conductive element is disposed at the second end, and the second conductive element is disposed at a relative position to the first conductive element along the moving path of the second end; The circuit to be turned on has the first conductive element and the second conductive element connected in series with the circuit to be turned on. When the first conductive element contacts the second conductive element, the circuit to be turned on is turned on.

[0005] In the battery bulging detection device described above, preferably, the circuit to be turned on includes a power supply and an indicator, wherein the power supply and the indicator are connected in series, and the indicator emits an indicator signal when the circuit to be turned on.

[0006] In the battery bulging detection device described above, preferably, the base is further provided with a fixed seat, the second conductive member is disposed on the fixed seat, and the second conductive member has a strip-shaped hole, which is used to adjust the position of the second conductive member on the fixed seat.

[0007] In the battery bulging detection device described above, preferably, the mounting base is also provided with a scale.

[0008] In the battery bulging detection device described above, preferably, the transmission component is made of insulating material.

[0009] In the battery bulging detection device described above, preferably, the non-contact surfaces of the first conductive element and the second conductive element are coated with an insulating coating, and the thickness of the insulating coating is greater than or equal to 5 micrometers.

[0010] In the battery bulging detection device described above, preferably, the support member includes support seats disposed on both sides of the transmission member, a rotating shaft is rotatably connected between the two support seats, and the transmission member is fixedly connected to the rotating shaft.

[0011] In the battery bulging detection device described above, preferably, the fixing frame has a boss along the circumference of the battery to be tested on the side near the transmission member, and a fixing member on the side of the fixing frame away from the transmission member. One end of the battery to be tested abuts against the boss, and the other end is connected to the fixing frame through the fixing member.

[0012] In the battery bulging detection device described above, preferably, the first end of the transmission member extends from the bottom of the battery to be tested to the bottom of the boss, and when the first end and the second end of the transmission member are on the same horizontal plane, the first end abuts against the bottom of the boss.

[0013] In the battery bulging detection device described above, preferably, the first end of the transmission member has a protrusion facing the battery to be tested, and when the battery to be tested abuts against the protrusion, the battery to be tested also abuts against the protrusion.

[0014] Compared with existing technologies, this utility model achieves battery swelling monitoring by triggering the circuit to conduct through the rotation of the transmission component. The swelling response is sensitive and can quickly identify the battery swelling condition, eliminating the error of manual detection and effectively avoiding missed or false judgments. The device can follow the entire battery charging and discharging cycle. As long as the battery swells and pushes the first end of the transmission component, it can trigger the circuit to conduct in real time, realizing full monitoring of the timing and evolution of swelling. In particular, it can accurately capture early micro-swelling signals that are difficult to detect by manual sampling, providing accurate data support for the research and development stage. This device can detect battery swelling during testing in a timely manner. It can determine the degree of swelling by observing the positional changes of the first conductive element and the indicator during the testing process, and effectively test and identify the swelling parameters, thereby improving battery testing efficiency and the sensitivity of battery swelling identification. Attached Figure Description

[0015] Figure 1 This is a perspective view of the battery bulging detection device provided in an embodiment of this utility model; Figure 2 This is a perspective view of the transmission assembly provided in an embodiment of the present invention; Figure 3 This is a front view of the battery swelling detection device provided in an embodiment of this utility model; Figure 4 This is a side sectional view of the battery bulging detection device provided in an embodiment of this utility model; Figure 5 This is a partial enlarged view of the scale provided in an embodiment of this utility model; Figure 6 This is a partial enlarged view of the protrusion and boss provided in an embodiment of this utility model.

[0016] Explanation of reference numerals in the attached figures: 10. Base; 11. Fixture; 12. Scale; 20. Fixture; 21. Boss; 22. Fastener; 30. Transmission assembly; 31. Support component; 310. Support base; 311. Rotating shaft; 32. Transmission component; 320. First end; 321. Second end; 322. Protrusion; 40. First conductive element; 41. Second conductive element; 410. Strip hole; 50. Power supply; 51. Indicator; 60. Battery to be tested. Detailed Implementation

[0017] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0018] See Figure 1-6 As shown, this utility model provides a battery bulging detection device, including a base 10, a fixing frame 20, a transmission assembly 30, a conductive assembly, and a circuit to be connected, wherein: The mounting bracket 20 is mounted on the base 10 and is used to support the battery 60 to be tested. The transmission assembly 30 includes a support member 31 and a transmission member 32. The support member 31 is mounted on the base 10, and the transmission member 32 is rotatably connected to the support member 31. The transmission member 32 has a first end 320 and a second end 321 that are disposed opposite to each other. The first end 320 extends to the bottom of the battery 60 to be tested. The conduction assembly includes a first conduction member 40 and a second conduction member 41. The first conduction member 40 is disposed at the second end 321, and the second conduction member 41 is disposed at the relative position of the first conduction member 40 along the moving path of the second end 321. The first conduction member 40 and the second conduction member 41 are connected in series with the circuit to be conducted. When the first conduction member 40 contacts the second conduction member 41, the circuit to be conducted is turned on. In the embodiments provided in this application, the battery under test 60 is supported on the fixed frame 20, with one end abutting against the first end 320 of the transmission member 32. When the battery under test 60 bulges, it applies force to the first end 320 of the transmission member 32, causing the transmission member 32 to rotate around its axis. At this time, the first end 320 of the transmission member 32 descends, and the second end 321 rises. When the second end 321 moves to the point where the first conductive member 40 contacts the second conductive member 41, the circuit to be connected is activated, indicating that the battery has reached the set maximum bulging amount. Determining the bulging state through objective mechanical triggering can completely replace manual experience judgment, avoiding the problems of missed judgments and misjudgments that may occur when different personnel conduct tests. This unifies the bulging judgment standard for all batteries under test 60, improves the reliability of the test, and can accurately capture the timing of early micro-bulging of the battery during the test, providing earlier data support for tracing the root causes of problems in battery research and development.

[0019] See Figure 1 and Figure 3 As shown, to more intuitively detect battery swelling, in this embodiment, the circuit to be conducted includes a power supply 50 and an indicator 51. The power supply 50 and the indicator 51 are connected in series. When the circuit to be conducted is turned on, the indicator 51 emits an indicator signal. The indicator 51 can be a buzzer alarm or an indicator light. When the first conductive element 40 contacts the second conductive element 41, the circuit to be conducted is turned on, and the buzzer or indicator light emits an indicator signal. Through intuitive means such as light and sound, a reminder is given at the moment swelling occurs, allowing experimental personnel to monitor the swelling situation in a timely manner. Furthermore, when the indicator 51 is triggered, staff can promptly record the current battery operating parameters, quickly locate the point where swelling occurs, and simplify the operation process in research and development testing.

[0020] See Figure 5As shown, in some embodiments of this application, a fixed seat 11 is also provided on the base 10, and a second conductive member 41 is provided on the fixed seat 11. A strip-shaped hole 410 is provided on the second conductive member 41, which is used to adjust the position of the second conductive member 41 on the fixed seat 11. The second conductive member 41 is set on the moving path of the second end 321 of the transmission member 32 and corresponds to the first conductive member 40. The second conductive member 41 is fixed on the base 10 by the fixed seat 11. During the research and development process, it is necessary to obtain different degrees of bulging identification. By adjusting the height of the second conductive member 41, the distance from the first conductive member 40 to the second conductive member 41 can be changed, thereby adjusting the upper limit of bulging. For example, when the distance is reduced, only slight bulging of the battery is needed to trigger the circuit to conduct, which can capture early micro-bulging signals; when the distance is increased, a larger amount of bulging is required to trigger the circuit to conduct, which can be used to identify the severe bulging threshold. Of course, other related tests can also be performed to adapt to the research and development depth requirements, which will not be elaborated here. The position of the second conductive element 41 can be directly adjusted through the strip hole 410 without disassembling or replacing parts, which can reduce test interruption time.

[0021] See Figure 1 and Figure 5 As shown, in this embodiment, a scale 12 is also provided on the mounting base 11. The initial distance between the first conductive element 40 and the second conductive element 41 can be directly measured using the scale 12, achieving millimeter-level accuracy. Specifically, to verify the accuracy of the battery swelling amount and the distance between the first conductive element 40 and the second conductive element 41, the following method can be used: fix the battery on the mounting bracket 20, adjust the position of the second conductive element 41 so that its bottom end face corresponds to 3mm on the scale 12, connect the battery testing device, and start the test. When the first conductive element 40 contacts the second conductive element 41, the indicator light illuminates, the test is stopped, and the battery length is measured using a vernier caliper. The battery swelling amount is calculated to be 3mm, which is consistent with the set parameters. Verification with multiple sets of different set parameters shows consistency. Therefore, this battery swelling testing device can achieve high-precision battery swelling identification.

[0022] In this embodiment, the transmission component 30 is made of insulating material. Specifically, it can be made of epoxy board FR-4 high insulating material with an ohmic impedance higher than 1 megohm.

[0023] Both the non-contact surfaces of the first conductive element 40 and the second conductive element 41 are coated with an insulating coating, and the thickness of the insulating coating is greater than or equal to 5 micrometers. The first conductive element 40 and the second conductive element 41 are made of metal materials that are resistant to high temperatures and not easily deformed. In order to prevent other factors from causing the circuit to be conducted to conduct, except for the contact surfaces of the first conductive element 40 and the second conductive element 41, both are coated with an alumina ceramic insulating coating with an insulating ohmic impedance higher than 1 megohm.

[0024] See Figure 1-2As shown, in some embodiments of this application, the support member 31 includes support seats 310 disposed on both sides of the transmission member 32, and a rotating shaft 311 is rotatably connected between the two support seats 310. The transmission member 32 is fixedly connected to the rotating shaft 311. The transmission member 32 is equivalent to a lever. When its first end 320 descends, its second end 321 rises. During the rising process, the first conductive member 40 contacts the second conductive member 41 and triggers the circuit to be connected.

[0025] See Figure 4 and Figure 6 As shown, in this embodiment, the mounting bracket 20 has a boss 21 along the circumference of the battery 60 to be tested on the side near the transmission member 32, and a fixing member 22 on the side away from the transmission member 32. One end of the battery 60 to be tested abuts against the boss 21, and the other end is connected to the mounting bracket 20 through the fixing member 22. The boss 21 is arranged along the circumference of the battery, which can radially position the battery from the bottom and prevent the battery from tilting. The top of the battery has a tab. The fixing member 22 fixes the battery axially by fixing the tab to the mounting bracket 20, so that the installation height, verticality and stress state of each battery are completely consistent. The initial contact state between the bottom of the battery and the first end 320 of the transmission component 32 is completely consistent, ensuring that the initial distance between the first conductive component 40 and the second conductive component 41 can truly correspond to the amount of battery swelling, avoiding gap errors caused by loose installation, and eliminating the interference of installation deviation on the test. In addition, by fixing the top of the battery under test 60, when the battery swells, it cannot expand upwards, but can only push the bottom transmission component 32 downwards, improving the detection accuracy of swelling. Of course, when testing batteries of different heights, it is only necessary to replace the fixing bracket 20 of different heights.

[0026] See Figure 3-4 and Figure 6 As shown, the test battery 60 needs to be frequently replaced during R&D testing. To enable the transmission component 32 to quickly reset after testing, in some embodiments of this application, the first end 320 of the transmission component 32 extends from the bottom of the test battery 60 to the bottom of the boss 21. When the first end 320 and the second end 321 of the transmission component 32 are on the same horizontal plane, the first end 320 abuts against the bottom of the boss 21. After the test, the first end 320 is lifted by pressing down the second end 321 of the transmission component 32 until the first end 320 abuts against the bottom of the boss 21, that is, the first end 320 stops moving upward with the bottom of the boss 21 as the limit. At this time, the transmission component 32 returns to the balanced state where the first end 320 and the second end 321 are on the same horizontal plane, ensuring that the initial position of the transmission component 32 is completely consistent after each reset, realizing the rapid reset of the transmission component 32 and greatly improving the test turnaround efficiency.

[0027] See Figure 3-4 and Figure 6As shown, in this embodiment, the first end 320 of the transmission member 32 has a protrusion 322 facing the battery 60 under test. When the battery 60 under test abuts against the protrusion 21, the battery 60 also abuts against the protrusion 322. The function of the protrusion 21 is to circumferentially position the battery, but it will cause a certain height difference between the bottom of the battery and the first end 320 of the transmission member 32 due to the thickness of the protrusion 21 itself. Therefore, the protrusion 322 is provided to compensate for this difference, so that when the battery abuts against the protrusion 21, the bottom of the battery can be in close contact with the protrusion 322, rather than being suspended in the air. This ensures that the first pushing force when bulging occurs can directly act on the transmission member 32, avoiding delayed triggering of bulging due to the initial gap.

[0028] Based on the above embodiments, the working principle of the battery bulging detection device provided by this utility model is as follows: Adjust the position of the second conductive element 41 according to the test requirements. The first end 320 of the transmission element 32 abuts against the bottom of the boss 21. The first end 320 and the second end 321 of the transmission element 32 are kept horizontal. Place the battery under test 60 on the boss 21. The top of the battery under test 60 is connected to the fixing frame 20 through the fixing element 22. The bottom of the battery under test 60 contacts the boss 322. Turn on the battery testing equipment for testing. During the test, the battery under test 60 bulges. The bottom of the battery under test 60 presses down on the first end 320 of the transmission element 32. At the same time, the second end 321 of the transmission element 32 moves up. When the first conductive element 40 contacts the second conductive element 41, the circuit to be connected is turned on, and the indicator 51 sends an indication signal.

[0029] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A battery bulging detection device, characterized in that, include: Base; A mounting bracket, disposed on the base, is used to support the battery to be tested; A transmission assembly includes a support member and a transmission member. The support member is disposed on the base, and the transmission member is rotatably connected to the support member. The transmission member has a first end and a second end disposed opposite to each other, and the first end extends to the bottom of the battery under test. The conductive component includes a first conductive element and a second conductive element, wherein the first conductive element is disposed at the second end, and the second conductive element is disposed at a relative position to the first conductive element along the moving path of the second end; The circuit to be turned on has the first conductive element and the second conductive element connected in series with the circuit to be turned on. When the first conductive element contacts the second conductive element, the circuit to be turned on is turned on.

2. The battery bulging detection device according to claim 1, characterized in that, The circuit to be turned on includes a power supply and an indicator. The power supply and the indicator are connected in series. When the circuit to be turned on is turned on, the indicator emits an indicator signal.

3. The battery bulging detection device according to claim 1, characterized in that, The base is also provided with a fixed seat, and the second conductive member is provided on the fixed seat. The second conductive member has a strip hole, which is used to adjust the position of the second conductive member on the fixed seat.

4. The battery bulging detection device according to claim 3, characterized in that, The mounting base is also equipped with a scale.

5. The battery bulging detection device according to claim 1, characterized in that, The transmission components are made of insulating materials.

6. The battery bulging detection device according to claim 1, characterized in that, Both the non-contact surfaces of the first and second conductive components are coated with an insulating coating, and the thickness of the insulating coating is greater than or equal to 5 micrometers.

7. The battery bulging detection device according to claim 1, characterized in that, The support member includes support seats on both sides of the transmission member, and a rotating shaft is rotatably connected between the two support seats. The transmission member is fixedly connected to the rotating shaft.

8. The battery bulging detection device according to claim 1, characterized in that, The mounting bracket has a boss along the circumference of the battery under test on the side near the transmission component, and a fixing member on the side away from the transmission component. One end of the battery under test abuts against the boss, and the other end is connected to the mounting bracket through the fixing member.

9. The battery bulging detection device according to claim 8, characterized in that, The first end of the transmission component extends from the bottom of the battery under test to the bottom of the boss. When the first end and the second end of the transmission component are on the same horizontal plane, the first end abuts against the bottom of the boss.

10. The battery bulging detection device according to claim 8, characterized in that, The first end of the transmission component has a protrusion facing the battery under test. When the battery under test abuts against the protrusion, the battery under test also abuts against the protrusion.

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