Battery pack air tightness detector

Abstract

The utility model belongs to the battery package air tightness detection field, especially relate to a kind of battery package air tightness detector, comprising: casing, high pressure output head and low pressure output head are provided on the lateral wall of casing;Busbar, be set in the casing;Valve group, including respectively with the inlet valve, high pressure valve, low pressure valve and air release valve of busbar intercommunication;High pressure pipeline, one end is connected with high pressure valve, the other end is connected with high pressure output head;Low pressure pipeline, one end is connected with low pressure valve, the other end is connected with low pressure output head.The battery package air tightness detector of the application.Fundamentally avoid high / low voltage mixed connection risk, it is designed through independent high pressure output head and low pressure output head, realize physical separation, special high pressure pipeline and low pressure pipeline ensure that gas does not mix in system, avoid the detection result error or equipment damage due to misconnection.

Description

Technical Field

[0001] This utility model relates to the field of battery pack airtightness testing, and in particular to a battery pack airtightness testing instrument. Background Technology

[0002] A battery pack airtightness tester, also known as an airtightness detector (or leak tester), is a precision instrument specifically designed to detect whether there are leaks in the battery pack casing. Its core purpose is to ensure the integrity of the battery pack's seal, preventing external water, dust, corrosive gases, etc., from entering the battery pack, while also ensuring that internal liquids such as coolant do not leak out.

[0003] Existing battery pack airtightness testers control a single interface for high / low pressure gas output via an operating interface, which can easily lead to misconnection during actual use. Utility Model Content

[0004] The main objective of this invention is to provide a battery pack airtightness tester, which aims to solve the technical problem of easy mixing of high / low pressure gas outputs in the prior art.

[0005] To achieve the above-mentioned objectives, this utility model proposes a battery pack airtightness tester, comprising: The housing has a high-voltage output head and a low-voltage output head provided on its side wall; The busbar is disposed within the housing; The valve assembly includes an intake valve, a high-pressure valve, a low-pressure valve, and a vent valve, which are respectively connected to the manifold; The high-pressure pipeline is connected at one end to the high-pressure valve and at the other end to the high-pressure output head; The low-pressure pipeline is connected at one end to the low-pressure valve and at the other end to the low-pressure output head.

[0006] Furthermore, the battery pack airtightness tester also includes: An air intake head is disposed on the side wall of the housing; The intake pipe is connected at one end to the intake valve and at the other end to the intake head.

[0007] Furthermore, the battery pack airtightness tester also includes: A filter is installed on the intake pipe.

[0008] Furthermore, the battery pack airtightness tester also includes: A proportional valve is installed on the intake pipe and located between the filter and the intake valve.

[0009] Furthermore, the battery pack airtightness tester also includes: A fixing block is fixed to the side wall of the housing; The high-voltage output head and the low-voltage output head are mounted on the side wall of the housing via the fixing block.

[0010] Furthermore, the shell is formed by a bottom shell, a front shell, a rear shell, side shells, and a top shell; The fixing block is fixed to the inner wall of the rear shell.

[0011] Furthermore, the battery pack airtightness tester also includes: The control panel is mounted on the front housing.

[0012] Furthermore, the busbar is fixed to the inner wall of the bottom shell.

[0013] Furthermore, the intake valve, high-pressure valve, low-pressure valve, and vent valve are all solenoid valves.

[0014] Furthermore, the battery pack airtightness tester also includes an antenna, which is mounted on the outer wall of the housing.

[0015] Beneficial effects: This utility model's battery pack airtightness tester fundamentally avoids the risk of high / low pressure mixing. Its independent high-pressure and low-pressure output heads achieve physical separation, and dedicated high-pressure and low-pressure pipelines ensure that gases do not mix within the system, preventing erroneous test results or equipment damage due to incorrect connections. High-pressure and low-pressure valves control their respective channels, reducing mutual interference. The independent channel design reduces pressure crosstalk and pipeline memory effects, resulting in more stable and repeatable test results. A manifold centrally distributes gas, simplifying pipeline connections. The modular valve group design facilitates individual maintenance and replacement, and the independent channels reduce troubleshooting time. The same device can meet testing tasks with different pressure requirements, completing a full range of tests from low to high pressure without changing pipelines, improving equipment utilization and reducing enterprise equipment investment costs. Attached Figure Description

[0016] Figure 1 This is a first-angle perspective view of a battery pack airtightness tester according to an embodiment of the present invention; Figure 2 This is a second-angle perspective view of a battery pack airtightness tester according to an embodiment of the present invention; Figure 3 This is a partial structural diagram of the internal structure of a battery pack airtightness tester according to an embodiment of the present invention.

[0017] in: 10. Housing; 11. Bottom housing; 12. Front housing; 13. Rear housing; 14. Side housing; 15. Top housing; 16. Control panel; 20. Busbar; 30. Valve assembly; 31. Inlet valve; 32. High-pressure valve; 33. Low-pressure valve; 34. Vent valve; 40. High-pressure pipeline; 41. High-pressure output head; 50. Low-pressure pipeline; 51. Low-pressure output head; 60. Intake pipe; 61. Intake head; 62. Filter; 63. Proportional valve; 70. Fixed block; 80. Antenna; 90. Handle.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] Reference Figures 1 to 3 An embodiment of the present invention provides a battery pack airtightness tester, comprising: a housing 10, wherein a high-voltage output head 41 and a low-voltage output head 51 are provided on the side wall of the housing 10; Busbar 20 is disposed within the housing 10; The valve assembly 30 includes an intake valve 31, a high-pressure valve 32, a low-pressure valve 33, and a vent valve 34, which are respectively connected to the manifold 20. The high-pressure pipeline 40 is connected at one end to the high-pressure valve 32 and at the other end to the high-pressure output head 41; The low-pressure pipeline 50 is connected at one end to the low-pressure valve 33 and at the other end to the low-pressure output head 51.

[0024] In this embodiment, the housing 10 is the main frame of the equipment, providing an installation platform and protection. The high-pressure output head 41 is the interface for high-pressure gas output; the low-pressure output head 51 is the interface for low-pressure gas output. The manifold 20 is the gas distribution center, connecting various valves. The valve group 30 is a collection of valves controlling the gas flow direction. The inlet valve 31 is the switch controlling gas entry into the manifold; the high-pressure valve 32 is the switch controlling high-pressure gas output; the low-pressure valve 33 is the switch controlling low-pressure gas output; and the vent valve 34 is the switch for discharging residual gas after testing. The high-pressure pipeline 40 is a dedicated channel for high-pressure gas, and the low-pressure pipeline 50 is a dedicated channel for low-pressure gas.

[0025] The control logic for battery pack airtightness detection in this embodiment is as follows: High pressure detection: Close the low pressure valve 33 and the vent valve 34, open the intake valve 31 and the high pressure valve 32, and close the intake valve 31 when the pressure is maintained. Low pressure detection: Close the high pressure valve 32 and the vent valve 34, open the intake valve 31 and the low pressure valve 33, and close the intake valve 31 when the pressure is maintained; Exhaust: Close intake valve 31, open vent valve 34, and high-pressure valve 32 or low-pressure valve 33.

[0026] In this embodiment, the high / low pressure channels are completely independent to avoid the risk of mixing; dedicated valve control improves detection accuracy and reliability.

[0027] In one embodiment, the battery pack airtightness tester further includes an air inlet 61 disposed on the side wall of the housing 10; The intake pipe 60 is connected at one end to the intake valve 31 and at the other end to the intake head 61.

[0028] The aforementioned air intake head 61 is an external air source connection interface, which can use a standard quick connector. The air intake pipe 60 is the gas passage connecting the air intake head and the air intake valve.

[0029] In this embodiment, instead of directly installing an air pump or other air source device inside the housing, an independent air intake channel is provided. This reduces the overall weight and volume of the battery pack airtightness tester, making it easier to move and use. Furthermore, a handle 90 can be provided on the top of the housing for easy lifting and movement.

[0030] In one embodiment, the battery pack airtightness tester further includes a filter 62 disposed on the air intake pipe 60.

[0031] The filter 62 described above is a device for removing impurities, moisture, and oil from the gas. It protects downstream precision components from contamination, improves gas quality, ensures detection accuracy, and can further extend equipment lifespan and reduce maintenance costs.

[0032] In one embodiment, the battery pack air tightness tester further includes a proportional valve 63, which is disposed on the air intake pipe 60 and located between the filter 62 and the air intake valve 31.

[0033] The aforementioned proportional valve 63 is a device that precisely regulates gas pressure and flow rate based on electrical signals. For example, the control module sets a target pressure, and the gas pressure sensor provides real-time feedback of the actual pressure; the PID (Proportion Integral Differential) algorithm adjusts the output of the proportional valve; after the pressure stabilizes, the inlet valve is closed to enter the pressure holding stage. The PID algorithm is a widely used engineering control technique that adjusts system errors through proportional, integral, and derivative control methods to achieve precise control.

[0034] The proportional valve 63 enables high-precision pressure control, and PID (Proportion Integral Differential) regulation ensures stable pressure, which can meet diverse testing needs.

[0035] In one embodiment, the battery pack airtightness tester further includes: a fixing block 70, fixed on the side wall of the housing 10; the high-voltage output head 41 and the low-voltage output head 51 are mounted on the side wall of the housing 10 via the fixing block 70.

[0036] The aforementioned fixing block 70 is a structural component used to securely install the output head and provide a seal. It is a plate-like structure with through holes along its thickness for the high-voltage output head 41 and the low-voltage output head 51 to pass through. Lugs are provided on its side to facilitate fixing the fixing block 70 to the side wall of the housing 10 with screws. The fixing block 70 improves the stability of the installation of the high-voltage output head 41 and the low-voltage output head 51.

[0037] In one embodiment, the housing 10 is formed by a bottom shell 11, a front shell 12, a rear shell 13, a side shell 14, and a top shell 15; wherein the fixing block 70 is fixed to the inner wall of the rear shell 13.

[0038] The bottom shell 11 is the base for mounting the core components; the front shell 12 is the front housing for mounting the operating interface; the rear shell 13 is the rear housing for mounting the interface components; the side shell 14 is the side housing connecting the front and rear shells; and the top shell 15 is the top protective shell. The fixing block 70 is fixed to the inner wall of the rear shell 13, indicating that the high-voltage output head 41 and the low-voltage output head 51 are located on the rear shell. During use, the control panel 16 on the front shell is used for control and data viewing, while the rear shell is mainly used for connecting wiring. The clear division of labor between the front and rear shells facilitates operation by the staff.

[0039] In one embodiment, the battery pack airtightness tester further includes a control panel 16, which is mounted on the front cover 12.

[0040] The aforementioned control panel 16 is a human-machine interface used for parameter setting, command input, and status monitoring. It corresponds to a control module, which generally includes: a main control unit, which can be an industrial-grade microcontroller unit (MCU) or a programmable logic controller (PLC); a power management module for stable power supply; a signal acquisition module for processing sensor signals; a valve drive module for controlling the movement of valve group 30; a storage module for saving detection data; and a communication module for supporting data transmission. The control panel 16 is mounted on the front housing 12, offering intuitive operation and a high degree of automation.

[0041] In one embodiment, the manifold 20 is fixed to the inner wall of the base shell 11. The manifold 20 typically has multiple pressure sampling points for multi-point pressure monitoring, ensuring safety and reliability. The manifold 20's location on the inner wall of the base shell 11 allows for better arrangement of various pipelines, achieving a compact pipeline layout.

[0042] In one embodiment, the intake valve 31, high-pressure valve 32, low-pressure valve 33, and vent valve 34 are all solenoid valves.

[0043] The aforementioned solenoid valve is a fast-switching valve that controls the valve core's movement through an electromagnetic coil. It features rapid response, precise control, high reliability, long service life, and fault diagnosis capabilities, thereby improving the control accuracy and service life of the battery pack airtightness tester.

[0044] In one embodiment, the battery pack airtightness tester further includes an antenna 80, which is mounted on the outer wall of the housing 10.

[0045] The aforementioned antenna 80 is a device for wireless communication. It enables automatic uploading of test results, remote operation, Over-the-Air (OTA) firmware updates, and encrypted data transmission. This facilitates intelligent data management, remote monitoring and maintenance, and integration into the production line.

[0046] This specification has disclosed the structural design and control logic of the equipment in detail. With the help of the accompanying drawings and explanations of terms, those skilled in the art can fully reproduce the equipment and implement its functions.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A battery pack airtightness tester, characterized in that, include: The housing has a high-voltage output head and a low-voltage output head provided on its side wall; The busbar is disposed within the housing; The valve assembly includes an intake valve, a high-pressure valve, a low-pressure valve, and a vent valve, which are respectively connected to the manifold; The high-pressure pipeline is connected at one end to the high-pressure valve and at the other end to the high-pressure output head; The low-pressure pipeline is connected at one end to the low-pressure valve and at the other end to the low-pressure output head.

2. The battery pack airtightness tester according to claim 1, characterized in that, Also includes: An air intake head is disposed on the side wall of the housing; The intake pipe is connected at one end to the intake valve and at the other end to the intake head.

3. The battery pack airtightness tester according to claim 2, characterized in that, Also includes: A filter is installed on the intake pipe.

4. The battery pack airtightness tester according to claim 3, characterized in that, Also includes: A proportional valve is installed on the intake pipe and located between the filter and the intake valve.

5. The battery pack airtightness tester according to claim 1, characterized in that, Also includes: A fixing block is fixed to the side wall of the housing; The high-voltage output head and the low-voltage output head are mounted on the side wall of the housing via the fixing block.

6. The battery pack airtightness tester according to claim 5, characterized in that, The shell is formed by a bottom shell, a front shell, a rear shell, side shells and a top shell; The fixing block is fixed to the inner wall of the rear shell.

7. The battery pack airtightness tester according to claim 6, characterized in that, Also includes: The control panel is mounted on the front housing.

8. The battery pack airtightness tester according to claim 6, characterized in that, The busbar is fixed to the inner wall of the bottom shell.

9. The battery pack airtightness tester according to any one of claims 1-8, characterized in that, The intake valve, high-pressure valve, low-pressure valve, and vent valve are all solenoid valves.

10. The battery pack airtightness tester according to any one of claims 1-8, characterized in that, It also includes an antenna, which is mounted on the outer wall of the housing.

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