Battery gas production testing device

Abstract

The utility model provides a battery gas production testing device, which comprises a connecting main body, a piercing part and a gas pressure testing part, the connecting main body is provided with a mounting hole along a first direction in a penetrating manner, the connecting main body is used for covering an explosion-proof valve, and the piercing part is movably mounted in the mounting hole and is suitable for moving along the first direction to extend out of the mounting hole and pierce the explosion-proof valve; one end of the air pressure testing part extends into the mounting hole, and the air pressure testing part can move in the first direction to be in sealed connection with the inner side wall of the mounting hole, so that the air pressure testing part is suitable for pushing the piercing part to pierce the explosion-proof valve, and therefore, an operator only needs to seal the air pressure testing part and the inner side wall of the mounting hole; in the movement process of the air pressure testing part, the piercing part can be pushed to move in the first direction until the explosion-proof valve is punctured, so that the purposes of pushing the piercing part to puncture the explosion-proof valve and establishing the sealing connection between the air pressure testing part and the connecting main body are ingeniously combined together, the operation steps are simplified, and the workload of an operator is reduced.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, specifically to a battery gas generation testing device. Background Technology

[0002] In related technologies, battery gas generation testing devices typically include a pressure testing unit, a connecting body, and a piercing part. The piercing part is movably installed inside the connecting body. When testing battery gas generation, the connecting body needs to be covered by an explosion-proof valve, and the pressure testing unit is connected to the piercing part. The operator pushes the pressure testing unit to cause the piercing part to move and pierce the explosion-proof valve. However, since the installation of the pressure testing unit and the pushing of the piercing part to pierce the explosion-proof valve are separate operations, the operation is cumbersome and increases the operator's workload. Utility Model Content

[0003] The present invention provides a battery gas generation testing device, which aims to solve the problem in related technologies where the installation of the gas pressure testing unit and the pushing and inserting part to puncture the explosion-proof valve are operated separately, resulting in cumbersome operation and increased workload for the operator.

[0004] In a first aspect, embodiments of this utility model provide a battery gas generation testing device.

[0005] In one embodiment, the battery gas generation testing apparatus includes:

[0006] A connecting body is provided with a mounting hole through it along a first direction, and the connecting body is used to cover the explosion-proof valve.

[0007] The penetrating part is movably installed in the mounting hole and is adapted to move along the first direction to extend out of the mounting hole and pierce the explosion-proof valve.

[0008] A pressure testing unit, one end of which extends into the mounting hole, is movable along the first direction to form a sealed connection with the inner wall of the mounting hole, so that the pressure testing unit is adapted to push the insertion part into the explosion-proof valve.

[0009] In one embodiment, the air pressure testing part is threadedly connected to the inner wall of the mounting hole.

[0010] In one embodiment, it further includes:

[0011] A bracket, wherein the bracket is disposed within the mounting hole;

[0012] An elastic element is elastically connected to the bracket and the insertion portion;

[0013] The bracket has a locked state and an unlocked state. When the bracket is in the locked state, it can lock the insertion part and store energy in the elastic element. When the bracket is in the unlocked state, it can unlock the insertion part, so that the elastic element is suitable for driving the insertion part to penetrate the explosion-proof valve.

[0014] In one embodiment, the support includes:

[0015] The expansion portion is movably mounted in the mounting hole along the first direction;

[0016] A limiting part is provided on the side of the opening part away from the air pressure testing part. The limiting part includes multiple support arms. The multiple support arms are arranged around the periphery of the insertion part along the circumference of the mounting hole. One end of each of the multiple support arms is connected to the inner wall of the mounting hole.

[0017] The elastic element is elastically connected between the spreading part and the inserting part. In the locked state, the multiple support arms converge to limit the inserting part, and the spreading part can be pushed by the air pressure testing part to compress the elastic element. The spreading part can spread the multiple support arms, so that the multiple support arms are separated from the inserting part, so that the bracket switches to the unlocked state.

[0018] In one embodiment, the insertion part has a needle and an abutment platform. The needle extends in a first direction and is capable of piercing the explosion-proof valve. The abutment platform protrudes radially from the needle and has an abutment surface that is disposed away from the air pressure testing part.

[0019] The support arm includes a first arm segment and a second arm segment connected together. The end of the first arm segment opposite to the second arm segment is connected to the inner wall of the mounting hole, and the second arm segment can abut against the abutting surface.

[0020] In one embodiment, a plurality of second arm segments have guide surfaces disposed in the axial direction toward the mounting hole, the guide surfaces being inclined in the axial direction toward the mounting hole along the direction toward the air pressure testing section; and / or,

[0021] The first arm segment is inclined in the direction away from the air pressure test section and toward the mounting hole.

[0022] In one embodiment, the expanding portion includes:

[0023] A base, one end of which is connected to the elastic element;

[0024] An annular boss extends circumferentially along the base and is connected to the sidewall of the base. The annular boss is used to abut against the plurality of support arms.

[0025] In one embodiment, the base is formed with a guide hole;

[0026] The insertion portion is located in the guide hole and is adapted to be movably connected to the base along the first direction.

[0027] In one embodiment, the bracket further includes an annular body connected to one end of the plurality of support arms, and the annular body is detachably connected to the inner wall of the mounting hole.

[0028] In one embodiment, a detachable structure is further included, the detachable structure comprising a latching protrusion and a latching groove adapted to the latching protrusion, one of the latching protrusion and the latching groove being disposed on the inner sidewall of the mounting hole, and the other being disposed on the annular body.

[0029] In one embodiment, the connection body includes:

[0030] A cylindrical body extends along the first direction, and the cylindrical body has the mounting hole;

[0031] A ring body extends circumferentially along the cylinder body and is connected to the side wall of the cylinder body. The ring body is used to seal and connect with the periphery of the explosion-proof valve.

[0032] In one embodiment, the ring body is provided with a welding area for welding and fixing to the periphery of the explosion-proof valve.

[0033] The beneficial effects of the embodiments of this utility model are as follows:

[0034] In this embodiment of the invention, the connecting body serves as the main structure, providing a base for the installation and fixation of the insertion part and the pressure testing part. Furthermore, the connection body is fitted with an explosion-proof valve, allowing the insertion part to precisely pierce the valve after extending out of the mounting hole. One end of the pressure testing part extends into the mounting hole, and the pressure testing part can move along a first direction until it forms a sealed connection with the inner wall of the mounting hole. This prevents gas leakage due to gaps at the connection between the pressure testing part and the inner wall of the mounting hole, allowing the gas discharged from the insertion part to be collected by the pressure testing part, thus improving the accuracy of measuring the amount of gas generated by the battery. In addition, while the air pressure testing unit moves to a sealing connection with the inner wall of the mounting hole, it is also adapted to push the piercing part to penetrate the explosion-proof valve. In this way, the operator only needs to seal the air pressure testing unit with the inner wall of the mounting hole. During the movement of the air pressure testing unit, it can push the piercing part to move in the first direction until it pierces the explosion-proof valve. This cleverly combines pushing the piercing part to pierce the explosion-proof valve and establishing a sealing connection between the air pressure testing unit and the connecting body, simplifying the operation steps and reducing the operator's workload. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the battery gas generation testing device provided in an embodiment of this utility model;

[0037] Figure 2 yes Figure 1 The diagram shown illustrates the structure of the bracket installed on the connecting body.

[0038] Figure 3 yes Figure 2 A cross-sectional schematic diagram of the bracket, connecting body, and insertion part shown;

[0039] Figure 4 yes Figure 3 A magnified view of part A shown below;

[0040] Figure 5 yes Figure 1 The diagram shows the structural schematic of the connecting body;

[0041] Figure 6 yes Figure 1 A schematic diagram of the structure of the bracket, the insertion part, and the elastic element shown;

[0042] Figure 7 yes Figure 1The diagram shows the structure of the battery gas generation test device connected to the explosion-proof valve.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100. Battery gas generation testing device; 10. Connecting body; 11. Mounting hole; 12. Cylinder; 13. Ring body; 20. Insertion part; 21. Needle; 22. Abutment platform; 221. Abutment surface; 30. Gas pressure testing part; 40. Bracket; 41. Spreading part; 411. Base; 4111. Guide hole; 412. Annular boss; 42. Limiting part; 421. Support arm; 4211. First arm section; 4212. Second arm section; 42121. Guide surface; 43. Annular body; 50. Elastic element; 61. Locking protrusion; 62. Locking groove; 210. Explosion-proof valve. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0046] In related technologies, battery gas generation testing devices typically include a pressure testing unit, a connecting body, and a piercing part. The piercing part is movably installed inside the connecting body. When testing battery gas generation, the connecting body needs to be covered by an explosion-proof valve, and the pressure testing unit is connected to the piercing part. The operator pushes the pressure testing unit to cause the piercing part to move and pierce the explosion-proof valve. However, since the installation of the pressure testing unit and the pushing of the piercing part to pierce the explosion-proof valve are separate operations, the operation is cumbersome and increases the operator's workload.

[0047] In view of this, the present invention proposes a battery gas generation testing device. Figures 1 to 6 This is a schematic diagram of an embodiment of the battery gas generation testing device provided by this utility model. Figure 7 This is a schematic diagram showing the battery gas generation testing device connected to an explosion-proof valve, as provided by this utility model. The battery gas generation testing device 100 provided by this utility model simplifies the operation steps and reduces the operator's workload. The battery gas generation testing device 100 will be described in detail below with reference to the main accompanying drawings.

[0048] Reference Figures 1 to 3 The battery gas generation testing device 100 includes a connecting body 10, a piercing part 20, and a pressure testing part 30. The connecting body 10 has a mounting hole 11 extending through it in a first direction. The connecting body 10 is used to cover the explosion-proof valve 210. The piercing part 20 is movably mounted in the mounting hole 11 and is adapted to move in the first direction to extend out of the mounting hole 11 and pierce the explosion-proof valve 210. One end of the pressure testing part 30 extends into the mounting hole 11. The pressure testing part 30 can move in the first direction to seal with the inner wall of the mounting hole 11, so that the pressure testing part 30 is adapted to push the piercing part 20 to pierce the explosion-proof valve 210.

[0049] In this embodiment of the invention, the connecting body 10 serves as the main structure, providing a base for the installation and fixation of the insertion part 20 and the pressure testing part 30. Furthermore, the connection body 10 is covered with an explosion-proof valve 210, allowing the insertion part 20 to precisely pierce the explosion-proof valve 210 after extending out of the mounting hole 11. One end of the pressure testing part 30 extends into the mounting hole 11, and the pressure testing part 30 can move along a first direction until it forms a sealed connection with the inner wall of the mounting hole 11. This prevents gas leakage due to gaps at the connection between the pressure testing part 30 and the inner wall of the mounting hole 11, allowing the gas discharged from the insertion part 20 to be collected by the pressure testing part 30, thus improving the accuracy of measuring the amount of gas generated by the battery. In addition, while the air pressure testing unit 30 moves to a sealing connection with the inner wall of the mounting hole 11, the air pressure testing unit 30 is adapted to push the piercing part 20 to pierce the explosion-proof valve 210. In this way, the operator only needs to seal the air pressure testing unit 30 with the inner wall of the mounting hole 11. During the movement of the air pressure testing unit 30, it can push the piercing part 20 to move in the first direction until it pierces the explosion-proof valve 210. This cleverly combines pushing the piercing part 20 to pierce the explosion-proof valve 210 and establishing a sealing connection between the air pressure testing unit 30 and the connecting body 10, simplifying the operation steps and reducing the operator's workload.

[0050] In one embodiment, the pressure testing section 30 is threadedly connected to the inner wall of the mounting hole 11. This ensures a stable connection between the pressure testing section 30 and the inner wall of the mounting hole 11, improving the mechanical strength of the battery gas generation testing device 100 and preventing loosening of the connecting body 10 and the pressure testing section 30 due to pressure changes during testing. The connection and fixation of the pressure testing section 30 to the connecting body 10 can be achieved through a simple rotational action, reducing operational difficulty and improving testing efficiency. During the tightening process of rotating the pressure testing section 30, it simultaneously pushes the piercing part 20 to move along a first direction until it pierces the explosion-proof valve 210. This design allows two steps to be completed in one action, improving the automation level of the test. The threaded connection forms a tight contact surface during tightening, providing good sealing performance. This ensures that gas will not leak from the connection during testing, guaranteeing the accuracy of the test. After the test is completed, the air pressure test section 30 can be easily removed from the connecting body 10 by rotating it in the opposite direction. This design makes the maintenance and upkeep of the battery gas generation test device 100 simpler and more convenient.

[0051] It should be noted that the method by which the air pressure testing part 30 can move along the first direction to achieve a sealed connection with the inner wall of the mounting hole 11 can be selected as needed. For example, in other embodiments, the air pressure testing part 30 can also move along the first direction to achieve a sealed connection with the inner wall of the mounting hole 11 by riveting. Specifically, this application does not limit this.

[0052] Reference Figure 3 , Figure 4 and Figure 6 In one embodiment, the battery gas generation testing device 100 further includes a bracket 40 and an elastic element 50. The bracket 40 is disposed within the mounting hole 11, and the elastic element 50 is elastically connected to the bracket 40 and the insertion part 20. The bracket 40 has a locked state and an unlocked state. When the bracket 40 is in the locked state, it can lock the insertion part 20, thus securing it securely and preventing unintended movement or insertion. In the locked state, the elastic element 50 stores energy to provide kinetic energy for the subsequent unlocking of the bracket 40 to drive the insertion part 20 into the explosion-proof valve 210. In the unlocked state, the bracket 40 can unlock the insertion part 20, allowing the elastic element 50 to drive the insertion part 20 into the explosion-proof valve 210, thereby automatically inserting the insertion part 20 into the explosion-proof valve 210 and improving the accuracy and timeliness of insertion. Furthermore, the locking and unlocking functions of the bracket 40 simplify the testing process. Before testing, the bracket 40 is locked to secure the insertion part 20 and the energy-storing elastic element 50. During testing, simply unlocking the bracket 40 allows for a quick insertion without additional operation or tools. This design improves testing efficiency and reduces operational difficulty.

[0053] Reference Figure 3 and Figure 6 In one embodiment, the bracket 40 includes a spreading portion 41 and a limiting portion 42. The spreading portion 41 is movably mounted in the mounting hole 11 along a first direction. The limiting portion 42 is located on the side of the spreading portion 41 away from the air pressure testing portion 30. The limiting portion 42 includes a plurality of support arms 421. The plurality of support arms 421 are arranged around the periphery of the insertion portion 20 along the circumference of the mounting hole 11. One end of each of the plurality of support arms 421 is connected to the inner sidewall of the mounting hole 11. The elastic element 50 is elastically connected between the spreading portion 41 and the insertion portion 20. In the locked state, the plurality of support arms 421 converge to limit the insertion portion 20, preventing the insertion portion 20 from moving or penetrating accidentally. The spreading portion 41 can be pushed by the air pressure testing portion 30 to compress the elastic element 50, so that the elastic element 50 stores energy. The spreading part 41 can spread out multiple support arms 421, separating them from the insertion part 20. This allows the bracket 40 to switch to the unlocked state, enabling the insertion part 20 to be driven by the elastic element 50 to insert into the explosion-proof valve 210. This allows the insertion action to be performed automatically, ensuring accuracy and timeliness. The bracket 40 switches from the locked to the unlocked state by pushing the pneumatic testing part 30, requiring no additional operation or tools. This design simplifies the testing process and improves testing efficiency.

[0054] Reference Figure 3 and Figure 6 In one embodiment, the insertion part 20 has a needle 21 and an abutment platform 22. The needle 21 extends along a first direction and is capable of piercing the explosion-proof valve 210. This design ensures that the insertion part 20 can accurately and effectively pierce the explosion-proof valve 210, thereby testing the battery gas production. The abutment platform 22 protrudes radially from the needle 21 and is provided with an abutment surface 221. The abutment surface 221 is disposed away from the air pressure testing part 30. The support arm 421 includes a first arm segment 4211 and a second arm segment 4212 connected together. One end of the first arm segment 4211 away from the second arm segment 4212 is connected to the inner wall of the mounting hole 11. The second arm segment 4212 can abut against the abutment surface 221, thereby restricting the movement of the insertion part 20 toward the explosion-proof valve 210 when the bracket 40 is in the locked state, preventing accidental operation that could cause the insertion part 20 to extend out of the mounting hole 11 and injure the operator. When unlocking is required, the spreading part 41 pushes the first arm segment 4211 of the support arm 421, causing the second arm segment 4212 to separate from the abutment surface 221, thus achieving the unlocking function. The structure is simple. The design of the abutment platform 22 is not only used for limiting and unlocking, but also enhances the structural strength of the insertion part 20. During the insertion process, the abutment platform 22 can withstand the reaction force from the explosion-proof valve 210, preventing the needle 21 from bending or breaking.

[0055] It should be noted that the shapes of the first arm segment 4211 and the second arm segment 4212 can be selected as needed. For example, in one embodiment, the first arm segment 4211 and the second arm segment 4212 can be two straight arm segments arranged at an included angle. In other embodiments, at least one of the first arm segment 4211 and the second arm segment 4212 can be a bent arm segment. Specifically, this application does not limit this.

[0056] Reference Figure 4 In one embodiment, multiple second arm segments 4212 have guide surfaces 42121 arranged along the axial direction of the mounting hole 11. The guide surfaces 42121 are inclined along the axial direction of the mounting hole 11 in the direction towards the pressure testing section 30. This design of the guide surfaces 42121 allows the insertion part 20 to slide along the guide surfaces 42121 towards the pressure testing section 30 during the transition from an unlocked to a locked state. This facilitates the sliding of the contact platform 22 along the guide surfaces 42121 towards the contact surface 221 to re-engage with the second arm segment 4212, thus re-locking the insertion part 20 and facilitating subsequent testing of the battery's gas production. The inclined design of the guide surfaces 42121 reduces the contact area between the needle 21 and the second arm segment 4212 during insertion, thereby reducing friction and resistance during insertion, decreasing wear on the insertion part 20, and extending its service life. Furthermore, reducing friction and resistance also helps improve the response speed of the insertion part 20, making the testing process faster and more efficient.

[0057] Reference Figure 3 and Figure 6 In one embodiment, the first arm segment 4211 is inclined along the axis of the mounting hole 11 in the direction away from the air pressure testing section 30. Thus, the inclined first arm segments 4211 provide guidance for the movement of the opening section 41, allowing it to move smoothly away from the air pressure testing section 30. When the opening section 41 is pushed by the air pressure testing section 30 in the direction away from the air pressure testing section 30, the opening section 41 can gradually separate the multiple first arm segments 4211 until the second arm segment 4212 separates from the contact surface 221, at which point the bracket 40 is unlocked.

[0058] Reference Figure 3 and Figure 6In one embodiment, the expansion portion 41 includes a base 411 and an annular boss 412. One end of the base 411 is connected to the elastic member 50, so that when the expansion portion 41 is pushed and moved by the air pressure testing portion 30, the base 411 can compress the spring, allowing the spring to quickly store energy. The annular boss 412 extends circumferentially along the base 411 and is connected to the side wall of the base 411. After the base 411 moves a certain distance, the annular boss 412 can abut against multiple support arms 421. As the base 411 continues to move a certain distance, the annular boss 412 can push the multiple support arms 421 away from each other, causing the bracket 40 to switch to the unlocked state. The combined design of the base 411 and the annular boss 412 ensures that during the movement of the expansion portion 41, the energy storage of the elastic member 50 and the unlocking of the bracket 40 have a sequential order, preventing the energy stored in the elastic member 50 from failing to push the insertion portion 20 to pierce the explosion-proof valve 210.

[0059] Reference Figure 3 and Figure 6 In one embodiment, the base 411 has a guide hole 4111, and the insertion part 20 is partially disposed in the guide hole 4111 and adapted to be movably connected to the base 411 along a first direction. Thus, the design of the guide hole 4111 makes the base 411 more stable relative to the insertion part 20 during movement, less prone to shaking or displacement. This allows the base 411 to move precisely relative to the insertion part 20 along the first direction and compress the elastic member 50 when pushed by the air pressure testing unit 30, allowing the elastic member 50 to store energy. Furthermore, when the bracket 40 is in the unlocked state, the annular boss 412 abuts against the multiple support arms 421, limiting the position of the annular boss 412. Under the guidance of the guide hole 4111, the insertion part 20 can be precisely driven by the elastic member 50 to insert into the explosion-proof valve 210, improving the accuracy of insertion.

[0060] Reference Figure 3 and Figure 4 The elastic element 50 includes a spring, which is elastically connected between the base 411 and the abutment platform 22. The spring is fitted onto the needle 21, and one end of the needle 21 is inserted into the guide hole 4111. This ensures that the needle 21 can move along the axial direction of the guide hole 4111 during movement, preventing the needle 21 from deviating or wobbling. Because the spring is fitted onto the needle 21, the elastic force applied by the spring to the needle 21 can accurately drive the needle 21 to penetrate the explosion-proof valve 210 in the first direction. The structure is simple and easy to install. Since the spring and the needle 21 are relatively independent components, they can be operated separately during maintenance or replacement, which reduces maintenance costs and time costs. The elastic force of the spring allows the needle 21 to react quickly when subjected to external force, thereby improving the response speed of the needle 21 penetrating the explosion-proof valve 210.

[0061] Reference Figure 3and Figure 6 In one embodiment, the support 40 further includes an annular body 43, which is connected to one end of a plurality of support arms 421. The annular body 43 is detachably connected to the inner wall of the mounting hole 11. As the connection point of the plurality of support arms 421, the annular body 43 provides a stable foundation for the entire support 40. This design allows the support 40 to better maintain its shape and stability when subjected to external forces, thereby ensuring the accuracy and reliability of the testing device. The detachable connection between the annular body 43 and the inner wall of the mounting hole 11 facilitates subsequent maintenance and replacement of the support 40. This detachable connection also reduces the manufacturing difficulty of the connecting body 10 and saves production costs to some extent.

[0062] Reference Figure 3 In one embodiment, the battery gas generation testing device 100 further includes a detachable structure, which includes a latching protrusion 61 and a latching groove 62 adapted to the latching protrusion 61. One of the latching protrusion 61 and the latching groove 62 is located on the inner sidewall of the mounting hole 11, and the other is located on the annular body 43. Thus, the design of the latching protrusion 61 and the latching groove 62 allows the bracket 40 and the connecting body 10 to be easily connected and separated. This detachable structure not only simplifies the installation process but also facilitates subsequent maintenance and replacement work, reducing the difficulty of operation and time costs. The cooperation between the latching protrusion 61 and the latching groove 62 makes the installation and disassembly process of the bracket 40 and the connecting body 10 simpler. In addition, when one of the bracket 40 and the connecting body 10 is damaged, the cooperation between the latching protrusion 61 and the latching groove 62 makes the replacement of the damaged part simple.

[0063] It should be noted that, in other embodiments, the method by which the annular body 43 is detachably connected to the inner wall of the mounting hole 11 can be selected as needed. For example, in one embodiment, the annular body 43 and the inner wall of the mounting hole 11 can be fixed by screwing together with a screw connector. In other embodiments, the annular body 43 and the inner wall of the mounting hole 11 can be connected by a pin.

[0064] Reference Figure 2 and Figure 5 In one embodiment, the connecting body 10 includes a cylindrical body 12 and an annular body 13. The cylindrical body 12 extends along a first direction and has a mounting hole 11. The annular body 13 extends circumferentially along the cylindrical body 12 and is connected to the side wall of the cylindrical body 12. The annular body 13 is used to seal the periphery of the explosion-proof valve 210. This helps to achieve a sealed connection between the explosion-proof valve 210 and the connecting body 10, thereby effectively preventing gas leakage from the connection between the connecting body 10 and the battery, ensuring that the battery gas generation test device 100 can accurately measure the battery gas generation. In addition, the annular body 13 increases the contact area between the connecting body 10 and the battery, making the connection between the connecting body 10 and the battery more secure.

[0065] Reference Figure 7 In one embodiment, the ring 13 is provided with a welding area for welding and fixing to the periphery of the explosion-proof valve 210. Welding is a high-strength connection method. By welding, the ring 13 and the periphery of the explosion-proof valve 210 are fixed together, forming a continuous and robust integral structure, preventing the connection body 10 from shaking during testing and affecting the test results. The welded connection ensures a high-precision seal between the interface of the ring 13 and the explosion-proof valve 210. After welding, a continuous metal barrier is formed at the weld, effectively preventing gas leakage and improving the measurement accuracy of the battery gas generation test device 100. Compared with other connection methods, welding simplifies the installation process. Operators only need to align the periphery of the explosion-proof valve 210 with the welding area of ​​the ring 13 and weld. This greatly saves installation time and cost and improves installation efficiency.

[0066] The following describes the operating steps of the battery gas generation testing device 100 provided in this application for measuring battery gas generation:

[0067] First, remove the battery to be tested, place the connecting body 10 over the explosion-proof valve 210, and weld the connecting body 10 and the explosion-proof valve 210 together by sealing weld; then, insert one end of the air pressure testing part 30 into the mounting hole 11 and thread one end of the air pressure testing part 30 to the inner wall of the mounting hole 11, and zero the reading of the air pressure testing part 30; while turning the air pressure testing part 30, the air pressure testing part 30 moves towards the explosion-proof valve 210 and pushes the opening part 41 to compress the elastic element 50, so that the elastic element 50 stores energy; when the air pressure testing part 30 is tightened, the opening part 41 opens up multiple support arms 421, and the multiple support arms 421 separate, thereby unlocking the insertion part 20, and the elastic element 50 drives the insertion part 20 to insert into the explosion-proof valve 210; the reading of the air pressure testing part 30 can be read to obtain the battery gas production.

[0068] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery gas generation testing device, characterized by, The utility model relates to a kind of safety valve test device, including: Connecting body, installation hole is provided along first direction through, the connecting body is used to cover the setting of explosion-proof valve setting; Puncture portion, movably mounted in the installation hole, adapted to move along the first direction to extend the installation hole and puncture the explosion-proof valve; Gas pressure test portion, one end of the gas pressure test portion extends into the installation hole, the gas pressure test portion can be moved to the inner side wall of the installation hole along the first direction to sealing connection, so that the gas pressure test portion is adapted to push the puncture portion and pierce the explosion-proof valve.

2. The battery gas production test device of claim 1, wherein, The gas pressure test portion is threadedly connected with the inner side wall of the installation hole.

3. The battery gas production test device according to claim 1 or 2, characterized by, Also including: Support, the support is arranged in the installation hole; Resilient member, resiliently connected between the support and the puncture portion; Wherein, the support has locking state and unlocking state, when the support is in the locking state, the support can lock the puncture portion and store energy for the resilient member, when the support is in the unlocking state, the support can unlock the puncture portion, so that the resilient member is adapted to drive the puncture portion and pierce the explosion-proof valve.

4. The battery gas production test apparatus according to claim 3, characterized by The support includes: Distraction portion, movably mounted in the installation hole along the first direction; Limiting portion, arranged on the side of the distraction portion away from the gas pressure test portion, the limiting portion includes a plurality of support arms, a plurality of the support arms are circumferentially arranged on the circumferential side of the puncture portion along the installation hole, one end of a plurality of the support arms is connected with the inner side wall of the installation hole; Wherein, the resilient member is resiliently connected between the distraction portion and the puncture portion, in the locking state, a plurality of the support arms are gathered to limit the puncture portion, and the distraction portion can be pushed by the gas pressure test portion to compress the resilient member;The distraction portion can distract a plurality of the support arms, so that a plurality of the support arms are separated from the puncture portion, so that the support switches to the unlocking state.

5. The battery gas production test apparatus according to claim 4, characterized by The puncture portion has a needle and an abutment platform, the needle extends along the first direction and can pierce the explosion-proof valve setting, the abutment platform protrudes from the needle along the radial direction of the needle, the abutment platform is provided with an abutment surface, the abutment surface is arranged away from the gas pressure test portion; The support arm includes a first arm segment and a second arm segment connected, one end of the first arm segment away from the second arm segment is connected with the inner side wall of the installation hole, the second arm segment can abut with the abutment surface.

6. The battery gas production test apparatus according to claim 5, characterized by A plurality of the second arm segment has a guide surface arranged towards the axis direction of the installation hole, the guide surface is arranged inclined towards the axis direction of the installation hole along the direction towards the gas pressure test portion;And / or, The first arm segment is arranged inclined towards the axis direction of the installation hole along the direction away from the gas pressure test portion.

7. The battery gas production test apparatus of claim 4, wherein The distraction portion includes: Base, one end of the base is connected with the resilient member; Annular boss, extending along the circumference of the base and connected with the side wall of the base, the annular boss is used to abut with a plurality of the support arms.

8. The battery gas production test apparatus according to claim 7, characterized by, The base is formed with a guide hole; The puncture portion is partially arranged in the guide hole and is adapted to be movably connected with the base along the first direction.

9. The battery gas production test apparatus of claim 4, wherein, The bracket further comprises a ring body connected with one end of the plurality of support arms, and the ring body is detachably connected with the inner side wall of the mounting hole.

10. The battery gas production test apparatus of claim 9, wherein The bracket further comprises a detachable structure comprising a clamping protrusion and a clamping groove matched with the clamping protrusion, one of the clamping protrusion and the clamping groove is arranged on the inner side wall of the mounting hole, and the other is arranged on the ring body.

11. The battery gas production test device of claim 1 or 2, wherein, The connecting body comprises: a cylinder body extending in the first direction, the cylinder body being formed with the mounting hole; a ring body extending along the circumference of the cylinder body, the ring body being connected with the side wall of the cylinder body, and the ring body being used to sealably connect with the circumference of the explosion-proof valve.

12. The battery gas production test apparatus of claim 11, wherein, The ring body is provided with a welding area for welding and fixing with the circumference of the explosion-proof valve.

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