Battery sealing performance detection device

Abstract

The utility model belongs to the technical field of battery detection, and discloses a battery sealing performance detection device. The battery sealing performance detection device comprises a liquid supply mechanism, a communication mechanism and a detection piece. The liquid supply mechanism is used for supplying detection liquid with preset pressure; an inlet of the communication mechanism is communicated with the liquid supply mechanism, and an outlet is hermetically communicated with a to-be-tested piece, specifically a communication port of the to-be-tested piece; the detection piece is arranged on the sealing part of the to-be-detected piece and is configured to be in contact with the detection liquid to change color so as to judge the sealing performance of the sealing part of the to-be-detected piece. The battery sealing performance detection device can detect and evaluate the sealing performance of the to-be-detected piece, so that the sealing performance of to-be-detected pieces of various sizes can be detected in the design period, and a part of sealing problems can be solved in the design process of the to-be-detected piece.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to a battery sealing detection device. Background Art

[0002] Batteries are a common product in daily life. Currently, batteries are divided into soft-pack batteries with aluminum-plastic film casings, such as the commonly used lithium-ion soft-pack batteries in mobile phones, computers, power tools, etc.; cylindrical batteries or button batteries with metal casings, such as household remote control batteries, batteries for household water, electricity, and gas meters, and column-type lithium-ion power batteries; and some batteries with plastic casings, such as lead-acid batteries in automobiles. Due to their unique chemical properties and application scenarios, these battery types use different seals. For soft-pack batteries, the heat sealing effect of the aluminum-plastic film plays a decisive role in sealing; for column-type batteries, the key factors are welding and mechanical pressing matching.

[0003] Currently, poor battery sealing can lead to leakage and corrosion at best, and even safety hazards at worst. Safety issues caused by electrolyte leakage are common in existing electrical devices. Although post-assembly sealing tests are performed on cylindrical batteries, issues with equipment and time may prevent complete detection of sealing problems, potentially leading to electrolyte leakage during subsequent use. Therefore, minimizing the probability of battery leakage during battery design is a critical issue facing current researchers.

[0004] Therefore, there is an urgent need for a battery sealing detection device to solve the above technical problems. Utility Model Content

[0005] One purpose of the present utility model is to provide a battery sealing detection device, which can perform sealing tests on various types of shells of different sizes in the early stage of battery design to find the optimal shell data, so as to improve the sealing and service life of the battery during the battery design period.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Battery sealing detection device, comprising:

[0008] A liquid supply mechanism, used for supplying a testing liquid with a preset pressure;

[0009] A communication mechanism, wherein the inlet is connected to the liquid supply mechanism and the outlet is sealed and connected to the test piece;

[0010] The detection element is provided at the sealing portion of the test piece, and the detection element is configured to change color when in contact with the detection liquid.

[0011] Optionally, the detection liquid is water, the detection element is a liquid indicator, the liquid indicator is coated on the sealing portion of the detection element, and the liquid indicator can change color when in contact with water.

[0012] Optionally, the liquid indicator is anhydrous copper sulfate.

[0013] Optionally, the liquid supply mechanism includes a liquid pump and a hydraulic press, the outlet of the liquid pump is connected to the inlet of the hydraulic press, the outlet of the hydraulic press is connected to the inlet of the connecting mechanism, the liquid pump is used to transport the detection liquid to the hydraulic press, and the hydraulic press is used to pressurize the detection liquid to form a detection liquid with a preset pressure.

[0014] Optionally, the preset pressure is the actual sealing pressure of the test piece.

[0015] Optionally, the communication mechanism includes a delivery pipeline, an inlet of the delivery pipeline is connected to an outlet of the liquid supply mechanism, and an outlet of the delivery pipeline is sealed and connected to the test piece.

[0016] Optionally, the communication mechanism further includes a liquid inlet fixture, which is connected between the delivery pipeline and the test piece, and the cross-sectional area of ​​the inlet of the liquid inlet fixture is larger than the cross-sectional area of ​​the outlet of the liquid inlet fixture.

[0017] Optionally, along the supply direction of the detection liquid, the diameter of the liquid inlet fixture is reduced.

[0018] Optionally, the outlet of the liquid inlet fixture is provided with a sealing member, and the sealing member is sealedly connected to the test piece.

[0019] Optionally, the above-mentioned test piece includes a shell and a cover plate, the above-mentioned shell and the cover plate are sealedly connected, the above-mentioned shell is provided with a connecting port, and the above-mentioned connecting port is used for sealingly connecting with the above-mentioned connecting mechanism; the above-mentioned cover plate is provided with a sealing port, and the above-mentioned sealing port is sealed with a sealing pin, and the connection between the above-mentioned sealing pin and the above-mentioned sealing port and the connection between the above-mentioned shell and the above-mentioned cover plate are both configured as the above-mentioned sealing part.

[0020] Beneficial effects of the utility model:

[0021] The utility model provides a battery sealing detection device. When detecting a piece to be tested, the piece to be tested is first connected to a connecting mechanism, and the detection piece is installed on the sealing part of the piece to be tested. Then, the liquid supply mechanism is opened to allow the detection liquid of a preset pressure to be delivered to the piece to be tested through the connecting mechanism. If the detection piece does not change color within a preset time, it can be determined that the sealing part of the piece to be tested has good sealing. Or if the detection piece changes color, the time from the sealing state to the sealing failure of the sealing part of the piece to be tested can be determined, so as to evaluate the sealing performance of the corresponding piece to be tested. Furthermore, the sealing performance of pieces to be tested of various sizes can be detected during the design period, so that some sealing problems of the piece to be tested can be solved during the design process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a battery sealing detection device provided in a specific embodiment of the present utility model;

[0023] Figure 2 It is a comparison diagram of the detection structures of various embodiments provided in the specific implementation manner of the present utility model.

[0024] In the picture:

[0025] 10. Liquid supply mechanism; 11. Liquid pump; 12. Hydraulic press;

[0026] 20. Connecting mechanism; 21. Delivery pipeline; 22. Liquid inlet fixture;

[0027] 30. Inspection parts;

[0028] 100, part to be tested; 110, housing; 120, cover plate; 130, sealing pin. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0030] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0033] Please refer to the attached Figure 1 and Figure 2 The utility model introduces a battery sealing detection device.

[0034] It should be noted that the DUT 100 in this embodiment is a battery housing structure, which is used to perform preliminary testing on the sealing state of the battery after sealing. Of course, in other embodiments, the DUT 100 can also be other structures that require preliminary sealing testing, which is not specifically limited here.

[0035] Please refer to Figure 1 Specifically, the test piece 100 includes a shell 110 and a cover plate 120, which are sealed and connected to each other. The shell 110 has a communication port. The cover plate 120 has a sealing port, which is sealed with a sealing pin 130. The connection between the sealing pin 130 and the sealing port forms a sealing portion. The sealing performance of the test piece 100 is mainly ensured at the connection between the shell 110 and the cover plate 120, and at the connection between the sealing port and the sealing pin 130.

[0036] In this embodiment, the battery sealing test device includes a liquid supply mechanism 10, a communication mechanism 20, and a testing member 30. The liquid supply mechanism 10 is used to supply a testing liquid at a preset pressure. The communication mechanism 20 has an inlet connected to the liquid supply mechanism 10 and an outlet sealed and connected to the test device 100, specifically the communication port of the test device 100. The testing member 30 is disposed on the sealing portion of the test device 100 and is configured to change color upon contact with the testing liquid.

[0037] When testing a DUT 100, the battery sealing testing device of this embodiment first connects the DUT 100 to the connecting mechanism 20 and installs the testing member 30 on the sealing portion of the DUT 100. The liquid supply mechanism 10 is then opened to allow testing liquid at a preset pressure to be delivered into the DUT 100 through the connecting mechanism 20. If the testing member 30 does not change color within a preset time, the sealing of the DUT 100 can be determined to be good. If the testing member 30 changes color, the time from the sealing state to sealing failure of the DUT 100 can be determined, thereby evaluating the sealing of the DUT 100. This allows testing of the sealing of DUTs 100 of various sizes during the design process, allowing some sealing issues of the DUT 100 to be addressed during the design process.

[0038] It should be noted that the preset pressure is the actual sealing pressure of the test piece 100 , that is, the sealing pressure actually required by the test piece 100 , so as to ensure that whether the sealing meets the requirements is determined within the range of the sealing pressure that the test piece 100 may withstand.

[0039] Furthermore, the detection member 30 is disposed on the outer surface of the sealing portion of the test piece 100 , so that the sealing of the test piece 100 can be determined based on whether the detection liquid input into the test piece 100 changes color upon contact with the detection member 30 .

[0040] In some embodiments, the detection liquid is water, and the detection element 30 is a liquid indicator. The liquid indicator is coated on the sealing portion of the test piece 100. The liquid indicator changes color when it comes into contact with water. This arrangement makes the detection cost lower and the detection results obvious, which is convenient for the detection personnel to make judgments.

[0041] Exemplarily, the liquid indicator is anhydrous copper sulfate, which changes color when exposed to water and can better display the test results.

[0042] Please refer to Figure 1 In some embodiments, the liquid supply mechanism 10 includes a liquid pump 11 and a hydraulic press 12. The outlet of the liquid pump 11 is connected to the inlet of the hydraulic press 12, which in turn is connected to the inlet of the communication mechanism 20. The liquid pump 11 is used to deliver testing liquid to the hydraulic press 12, which is used to pressurize the testing liquid to form a testing liquid with a preset pressure. During use, the liquid pump 11 is turned on to continuously output the testing liquid, and the hydraulic press 12 continuously pressurizes the testing liquid to the preset pressure before outputting it to the test piece 100 to ensure the sealing of the test piece 100. Furthermore, after the test piece 30 changes color, the pressure value of the hydraulic press 12 can be read to obtain its final pressure relief value and determine its actual pressure relief value.

[0043] In some embodiments, the connecting mechanism 20 includes a delivery pipeline 21, the inlet of the delivery pipeline 21 is connected to the outlet of the liquid supply mechanism 10, and the outlet of the delivery pipeline 21 is sealed and connected to the test piece 100. The setting of the delivery pipeline 21 increases the delivery path of the pressurized detection liquid, so that the detection liquid can be continuously delivered to the test piece 100.

[0044] In some embodiments, the connecting mechanism 20 further includes a liquid inlet jig 22, which is connected and arranged between the delivery pipeline 21 and the test piece 100. The cross-sectional area of ​​the inlet of the liquid inlet jig 22 is larger than the cross-sectional area of ​​the outlet of the liquid inlet jig 22, so that a large amount of test liquid is stored at the front end of the liquid inlet jig 22 and is delivered to the test piece 100 through a small area channel to ensure that the test liquid is not interrupted during the process of being delivered to the test piece 100, and at the same time, the internal pressure of the test piece 100 does not increase too quickly.

[0045] Optionally, the diameter of the liquid inlet fixture 22 is reduced along the supply direction of the test liquid, so that the internal pressure of the test piece 100 is gradually and evenly increased, thereby better simulating the internal pressure of the test piece 100 and improving the accuracy of the test result.

[0046] In some embodiments, a seal is provided at the outlet of the liquid inlet fixture 22, and the seal is sealed to the device under test 100, so that the device under test 100 is sealedly connected to the outlet of the liquid inlet fixture 22, thereby avoiding the problem of pressure leakage inside the device under test 100 causing the sealing test result to be invalid.

[0047] Next, the battery sealing detection device of this embodiment is used to detect various test pieces 100 , and the detection results are compared.

[0048] It should be noted that, in each of the following embodiments, the shell 110 and the cover plate 120 of the test piece 100 are pressed together and then melt-welded by laser welding; then the sealing pin 130 is pressed to the sealing mouth, and at the same time, an opening is opened at the bottom of the shell 110, and the opening diameter satisfies the connection size of the liquid inlet fixture 22.

[0049] Please refer to Figure 2 Example 1: Dimensions of the shell 110 of the test piece 100: The height of the shell 110 is 47.5 (+0.2 / -0.1) mm, the inner diameter is 13.5 (+0.02 / -0.08) mm, and the wall thickness is 0.3 (+0.03 / -0.03) mm; Dimensions of the cover plate 120: The outer diameter of the cover plate 120 is 13.5 (+0.04 / 0) mm, and the outer diameter of the sealing port is 1.1 (+0.05 / 0) mm; Dimensions of the sealing pin 130: The outer diameter is 1.21 (+0.01 / -0.01) mm, and the height is 0.8 (+0.1 / -0.1) mm.

[0050] By performing a sealing test on this embodiment, the pressure relief pressure detected was 1.24 MPa, and the detection member 30 did not change color.

[0051] Example 2: Dimensions of the shell 110 of the test piece 100: height 47.5 (+0.2 / -0.1) mm, inner diameter 13.5 (0 / -0.1) mm, wall thickness 0.3 (+0.03 / -0.03) mm; dimensions of the cover plate 120: outer diameter 13.5 (+0.04 / 0) mm, outer diameter of the sealing port 1.1 (+0.05 / 0) mm; dimensions of the sealing pin 130: outer diameter 1.21 (+0.01 / -0.01) mm, height 0.8 (+0.1 / -0.1) mm.

[0052] The difference between this embodiment and the first embodiment is the change in the inner diameter of the housing 110. Through the sealing test of this embodiment, the pressure relief pressure tested was 1.55 MPa, and the detection member 30 did not change color.

[0053] Example 3: Dimensions of the shell 110 of the test piece 100: height 47.5 (+0.2 / -0.1) mm, inner diameter 13.5 (+0.02 / -0.08) mm, wall thickness 0.3 (+0.03 / -0.03) mm; dimensions of the cover plate 120: outer diameter 13.5 (0 / -0.04) mm, outer diameter of the sealing port 1.1 (+0.05 / 0) mm; dimensions of the sealing pin 130: outer diameter 1.21 (+0.01 / -0.01) mm, height 0.8 (+0.1 / -0.1) mm.

[0054] The difference between this embodiment and the first embodiment is the change in the outer diameter of the cover plate 120. Through the sealing test of this embodiment, the pressure relief pressure is 0.98 MPa, and the detection member 30 changes color.

[0055] Example 4: Dimensions of the shell 110 of the test piece 100: height 47.5 (+0.2 / -0.1) mm, inner diameter 13.5 (+0.02 / -0.08) mm, wall thickness 0.3 (+0.03 / -0.03) mm; dimensions of the cover plate 120: outer diameter 13.5 (0 / -0.04) mm, outer diameter of the sealing port 1.1 (+0.05 / 0) mm; dimensions of the sealing pin 130: outer diameter 1.19 (+0.01 / -0.01) mm, height 0.8 (+0.1 / -0.1) mm.

[0056] The difference between this embodiment and the first embodiment is the change in the outer diameter of the sealing pin 130. Through the sealing test of this embodiment, the pressure relief pressure tested was 1.61 MPa, and the detection member 30 did not change color.

[0057] By testing the above-mentioned embodiments, it can be concluded that the battery sealing testing device in this embodiment can be used to test the sealing properties of the test pieces 100 of various structures and sizes, so as to obtain the optimal design value of the test piece 100 during the design period, so as to facilitate the early control of the sealing properties of the test piece 100.

[0058] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A battery sealing detection device, characterized in that: include: A liquid supply mechanism (10) for supplying a test liquid having a preset pressure; A communication mechanism (20), the inlet of which is connected to the liquid supply mechanism (10), and the outlet of which is sealed and connected to the test piece (100); The detection element (30) is arranged on the sealing portion of the test piece (100), and the detection element (30) is configured to change color when in contact with the detection liquid.

2. The battery sealing detection device according to claim 1, characterized in that: The detection liquid is water, the detection element (30) is a liquid indicator, the liquid indicator is coated on the sealing portion of the test element (100), and the liquid indicator can change color when in contact with water.

3. The battery sealing detection device according to claim 2, characterized in that: The liquid indicator is anhydrous copper sulfate.

4. The battery sealing detection device according to claim 1, characterized in that: The liquid supply mechanism (10) comprises a liquid pump (11) and a hydraulic press (12), wherein the outlet of the liquid pump (11) is connected to the inlet of the hydraulic press (12), and the outlet of the hydraulic press (12) is connected to the inlet of the communication mechanism (20). The liquid pump (11) is used to deliver the detection liquid to the hydraulic press (12), and the hydraulic press (12) is used to pressurize the detection liquid to form a detection liquid with a preset pressure.

5. The battery sealing detection device according to claim 1, characterized in that: The preset pressure is the actual sealing pressure of the test piece (100).

6. The battery sealing detection device according to claim 1, characterized in that: The communication mechanism (20) comprises a delivery pipeline (21), the inlet of the delivery pipeline (21) is connected to the outlet of the liquid supply mechanism (10), and the outlet of the delivery pipeline (21) is sealed and connected to the test piece (100).

7. The battery sealing detection device according to claim 6, characterized in that: The communication mechanism (20) further includes a liquid inlet fixture (22), which is arranged in communication between the delivery pipeline (21) and the test piece (100), and the cross-sectional area of ​​the inlet of the liquid inlet fixture (22) is larger than the cross-sectional area of ​​the outlet of the liquid inlet fixture (22).

8. The battery sealing detection device according to claim 7, characterized in that: Along the supply direction of the detection liquid, the diameter of the liquid inlet fixture (22) is reduced.

9. The battery sealing detection device according to claim 7, characterized in that: The outlet of the liquid inlet fixture (22) is provided with a sealing member, and the sealing member is sealed and connected to the test piece (100).

10. The battery sealing detection device according to any one of claims 1 to 9, characterized in that: The test piece (100) comprises a shell (110) and a cover plate (120), wherein the shell (110) and the cover plate (120) are sealed and connected, and the shell (110) is provided with a communication port, and the communication port is used for sealed communication with the communication mechanism (20); the cover plate (120) is provided with a sealing port, and a sealing pin (130) is sealed at the sealing port, and the connection between the sealing pin (130) and the sealing port and the connection between the shell (110) and the cover plate (120) are both configured as the sealing portion.

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