Airtightness testing device for small battery modules

Abstract

The utility model provides a kind of airtightness testing device of small battery module, it includes detachably connected module bin and upper cover, the bottom surface of the upper cover is provided with at least part fixed pressing block and movable pressing block of the module bin is inserted;The movable pressing block can be moved along the thickness direction of the upper cover, and its upper is provided with the gas pipe quick connector that penetrates the upper cover, and the bottom end of the gas pipe quick connector is provided with sealing ring.The device provided by the utility model can limit and fix small battery module, then utilize gas pipe quick connector to connect the inflation port of small battery module and external inflation equipment, not only without restriction to inflation equipment model, but also can avoid small battery module to shake or skew in the inflation process, cause cannot effectively inflate or other inflation accident, greatly improve the efficiency and security of airtightness test to small battery module.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery airtightness detection technical field especially a kind of airtightness testing device of small battery module. BACKGROUND

[0002] Battery module is through one or more single cell by series-parallel connection, for example, the small power bank that we often use in daily life is a kind of small battery module or battery system. At present, this kind of small battery module needs to have waterproof, immersion requirement, because water enters battery module, will lead to single cell or inside electronic device failure.

[0003] And how to detect whether battery module meets waterproof or immersion requirement is a key problem, currently, the method of testing airtightness is mostly used, but small battery module is difficult to fix and difficult to use large equipment to inflate due to small size, leading to that airtightness testing work is very difficult to carry out. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of airtightness testing device of small battery module to solve the problems in the above background.

[0005] The utility model discloses a kind of airtightness testing device of small battery module, it includes detachably connected module bin and upper cover, the bottom surface of the upper cover is provided with at least part of the fixed block and movable block of module bin insertion;The movable block can be moved along the thickness direction of the upper cover, its upper is provided with the gas pipe quick connector passing through the upper cover, the bottom end of the gas pipe quick connector is provided with sealing ring.

[0006] Further, the upper cover is provided with tube through hole and limit hole, the tube through hole is used to wear the gas pipe quick connector;The limit hole is located on the outer side of the tube through hole, for installing limit slide rod, the movable block is arranged at the bottom end of the limit slide rod, the outer portion of the limit slide rod is provided with stiff spring.

[0007] Further, the limit hole includes the first hole section and the second hole section distributed along the axial direction, the first hole section and the movable block are located at the two sides of the second hole section respectively, the inner diameter of the second hole section is greater than the inner diameter of the first hole section;The stiff spring is arranged in the second hole section, and the two ends are respectively abutted against the top wall of the second hole section and the movable block.

[0008] Further, one end of the limit slide rod is detachably connected with the movable block, and the other end is provided with a limit block with an outer diameter greater than the inner diameter of the limit hole.

[0009] Further, the movable pressing block is provided with an air through hole, the air pipe quick connector is detachably arranged on the top of the air through hole, the sealing ring is arranged in a ring groove at the bottom of the air through hole, the inner diameter of the ring groove is larger than the inner diameter of the air through hole, and the bottom surface of the sealing ring is lower than the bottom surface of the movable pressing block.

[0010] Further, the module bin and the upper cover are connected through a buckle lock, and the buckle lock comprises a detachable lock body arranged on the outer wall of the module bin and a detachable buckle body arranged on the upper cover.

[0011] Further, the side wall of the module bin is provided with a module grabbing groove which is recessed downward from the top end of the module bin.

[0012] Further, the module bin is provided with an obstacle avoiding groove which is recessed from the inner wall of the module bin to the outer wall of the module bin and is used for avoiding the wire harness or connector of the side wall of the battery module.

[0013] The utility model has the beneficial effect that: through the device, small battery modules are fixed in position, the air inlet of the small battery module is connected with external inflation equipment by using the air pipe quick connector, the type of the inflation equipment is not limited, and the small battery modules can be prevented from shaking or tilting during inflation, so that effective inflation or other inflation accidents are avoided, and the efficiency and safety of the air tightness test of the small battery modules are greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is the overall structure diagram of the embodiment of the utility model;

[0015] Figure 2 is the structure diagram of the module bin in the embodiment of the utility model;

[0016] Figure 3 is the structure diagram of the upper cover in the embodiment of the utility model;

[0017] Figure 4 is the front view of the upper cover in the embodiment of the utility model.

[0018] In the drawing:

[0019] 1, module bin; 1.1, module grabbing groove; 1.2, obstacle avoiding groove;

[0020] 2, upper cover; 2.1, pipe through hole; 2.2, limiting hole; 2.21, first hole section; 2.22, second hole section;

[0021] 3, fixed pressing block;

[0022] 4, movable pressing block; 4.1, air through hole; 4.2, ring groove;

[0023] 5. Tracheal quick connector;

[0024] 6. Sealing ring;

[0025] 7. Buckle lock; 7.1, detachable lock body; 7.2, detachable buckle body;

[0026] 8. Limiting sliding rod;

[0027] 9. Limiting block;

[0028] 10. Stiffening spring. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely below in combination with the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0031] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] Reference is made to the accompanying drawings Figures 1-4The embodiment provides a kind of airtightness testing device of small battery module, it includes module warehouse 1, upper cover 2, fixed pressing block 3, movable pressing block 4, gas pipe quick connector 5, sealing ring 6 and buckle lock 7, fixed pressing block 3 and movable pressing block 4 are respectively configured in the bottom surface of upper cover 2, for abutting fixed battery module in module warehouse 1, prevent it from in the process of inflation, cause cannot effectively inflate, fixed pressing block 3 and movable pressing block 4 respectively at least part of extension in module warehouse 1, and movable pressing block 4 can be moved along the thickness direction of upper cover 2, to adapt to the different sizes, shape of battery module in module warehouse 1;Gas pipe quick connector 5 is configured on movable pressing block 4, its top end penetrates upper cover 2, to connect the inflation equipment outside module warehouse 1, bottom end is configured with sealing ring 6, sealing ring 6 abuts on the inflation port of battery module in module warehouse 1, avoid leakage and cause cannot effectively inflate;Buckle lock 7 is configured on the outer wall of module warehouse 1 and upper cover 2, to be connected with the locking or separation of the two, so as to the taking and placing and limiting of battery module.

[0033] When the airtightness of small battery module is tested using the above device, open upper cover 2, place small battery module in module warehouse 1, inflation port direction is towards upper cover 2 and is aligned with movable pressing block 4, then press upper cover 2 above small battery module, with buckle lock 7, connect and lock upper cover 2 and module warehouse 1, so that small battery module cannot move, then connect inflation equipment (large or small can be) outside gas pipe quick connector 5, and small battery module is tested.

[0034] Through the above device, small battery module is limited and fixed, and then gas pipe quick connector 5 is used to connect the inflation port of small battery module and external inflation equipment, which not only has no limit on the type of inflation equipment, but also can avoid the shaking or tilting of small battery module during inflation, which can cause ineffective inflation or other inflation accidents, greatly improving the efficiency and safety of airtightness testing of small battery module.

[0035] Reference is made to the accompanying drawings Figure 4The upper cover 2 is provided with a pipe through hole 2.1 and a limiting hole 2.2, the pipe through hole 2.1 is used for penetrating the tracheal quick connector 5, the limiting hole 2.2 is located outside the pipe through hole 2.1 and is used for installing the limiting slide rod 8, the top end of the limiting slide rod 8 is provided with a limiting block 9, the outer diameter of the limiting block 9 is greater than the inner diameter of the limiting hole 2.2, the bottom end of the limiting slide rod 8 is connected with the movable pressing block 4, the outside of the limiting slide rod 8 is sleeved with a stiff spring 10, the bottom end of the stiff spring 10 abuts against the movable pressing block 4, and the top end abuts against the bottom surface of the upper cover 2 or the inner wall of the limiting hole 2.2. It is worth noting that the shape of the movable pressing block 4, the length of the limiting slide rod 8 and the length of the stiff spring 10 need to be arranged according to the shape and size of the air inlet of the battery module to be tested, so that before testing, the movable pressing block 4 is pushed upward to push the limiting slide rod 8, the stiff spring 10 is contracted and stored, the movable pressing block 4 is pressed downward, and then the movable pressing block 4 and the sealing ring 6 are tightly pressed against the battery module below, so as to ensure effective inflation. During normal testing, the battery module itself may leak or not leak, in the case of leakage, the above-mentioned tightly pressed state is maintained, and in the case of no leakage, inflation may cause the battery module to swell slightly, according to the above-mentioned principle, the tightly pressed effect of the movable pressing block 4 on the battery module is further improved, and the effectiveness of inflation during testing is ensured.

[0036] In a more preferred technical solution, the limiting hole 2.2 includes a first hole section 2.21 and a second hole section 2.22 distributed along the axial direction, the first hole section 2.21 and the movable pressing block 4 are respectively located on both sides of the second hole section 2.22, and the inner diameter of the second hole section 2.22 is greater than the inner diameter of the first hole section 2.21; the stiff spring 10 is arranged in the second hole section 2.22 and abuts against the top wall of the second hole section 2.22 and the movable pressing block 4 at both ends, the side wall of the limiting hole 2.2 is used for limiting and protecting the stiff spring 10, and the service life of the parts can be improved.

[0037] In order to facilitate installation, disassembly, maintenance or replacement of the movable pressing block 4 of a suitable specification, the bottom end of the limiting slide rod 8 is detachably connected with the movable pressing block 4, for example, a threaded hole can be arranged on the movable pressing block 4, and an external thread matched with the threaded hole is arranged at the bottom end of the limiting slide rod 8.

[0038] The tracheal quick connector 5 is prior art in the field and can be directly purchased as a finished product, so its structure and shape are not described in detail. In order to facilitate the installation of the tracheal quick connector 5 and the smooth inflation of the battery module, the movable pressing block 4 is provided with an air passage hole 4.1, the tracheal quick connector 5 is detachably arranged on the top of the air passage hole 4.1 (for example, threaded connection), and the sealing ring 6 is arranged in the ring groove 4.2 at the bottom of the air passage hole 4.1. The inner diameter of the ring groove 4.2 is greater than the inner diameter of the air passage hole 4.1, and the bottom surface of the sealing ring 6 is lower than the bottom surface of the movable pressing block 4. The diameter of the air passage hole 4.1 can be arranged according to the diameter of the inflation port on the measured small battery module, and the diameter of the sealing ring 6 should be greater than the diameter of the inflation port on the measured small battery module, so as to ensure the sealing between the air passage hole 4.1 and the inflation port, and further ensure the effectiveness of the inflation.

[0039] The above-mentioned buckle lock 7 can also use the prior art in the field, which specifically includes a detachable lock body 7.1 and a detachable buckle body 7.2. The detachable lock body 7.1 is arranged on the outer wall of the two long ends of the module bin 1, respectively, and the detachable buckle body 7.2 is arranged on the side edge of the upper cover 2 corresponding to the position of the detachable lock body 7.1, so as to facilitate the connection and fastening of the detachable lock body 7.1 and the detachable buckle body 7.2. The detachable lock body 7.1 and the detachable buckle body 7.2 are respectively arranged on the module bin 1 and the upper cover 2 through bolt, pin shaft and other connecting devices, so as to facilitate the installation, disassembly, maintenance and replacement.

[0040] Generally, the wire harness or connector on the battery module is arranged at the long end thereof, and the wide end thereof is relatively flat. In order to facilitate the taking and placing of the battery module from the module bin 1, the module bin 1 is provided with a module grabbing groove 1.1 on the two side walls in the wide direction, respectively. The module grabbing groove 1.1 is recessed downward from the top of the module bin 1 but does not reach the bottom of the module bin 1. Through the arrangement of the module grabbing groove 1.1, the hand can directly adhere to the outer wall of the battery module to take and place the module, avoiding the difficulty of taking out the battery module completely embedded in the module bin 1.

[0041] In addition, the long sides of the module bin 1 are also respectively provided with an obstacle avoidance groove 1.2, which is recessed from the inner wall of the module bin 1 to the outer wall of the module bin 1, but does not penetrate the outer wall of the module bin 1, and is used for avoiding the wire harness or connector on the side wall of the battery module to prevent the wire harness or connector from being damaged.

[0042] The above is the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and decorations can be made without departing from the principles of the present application, and these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. A hermeticity testing device for small battery modules, characterized by, The module bin and the upper cover are detachably connected, the bottom surface of the upper cover is provided with a fixed pressing block and a movable pressing block extending into the module bin at least partially, the movable pressing block is movable along the thickness direction of the upper cover, and a trachea quick connector penetrating through the upper cover is arranged on the movable pressing block, and the bottom end of the trachea quick connector is provided with a sealing ring.

2. The airtightness testing device for a small battery module according to claim 1, characterized by, A pipe through hole and a limiting hole are arranged on the upper cover, the pipe through hole is used for penetrating the trachea quick connector, the limiting hole is located outside the pipe through hole and is used for mounting a limiting slide rod, the movable pressing block is arranged at the bottom end of the limiting slide rod, and an additional spring is arranged outside the limiting slide rod.

3. The airtightness testing device for a small battery module according to claim 2, characterized by, The limiting hole comprises a first hole section and a second hole section distributed along the axial direction, the first hole section and the movable pressing block are located on the two sides of the second hole section respectively, the inner diameter of the second hole section is greater than that of the first hole section, and the additional spring is arranged in the second hole section and abuts against the top wall of the second hole section and the movable pressing block at two ends respectively.

4. The airtightness testing device for a small battery module according to claim 2 or 3, characterized by, One end of the limiting slide rod is detachably connected with the movable pressing block, and the other end is provided with a limiting block with an outer diameter greater than the inner diameter of the limiting hole.

5. The airtightness testing device for a small battery module according to claim 4, characterized by, The movable pressing block is provided with a gas through hole, the trachea quick connector is detachably arranged at the top of the gas through hole, the sealing ring is arranged in a ring groove at the bottom of the gas through hole, the inner diameter of the ring groove is greater than that of the gas through hole, and the bottom surface of the sealing ring is lower than that of the movable pressing block.

6. The airtightness testing apparatus for small battery modules according to any one of claims 1 to 3, 5, wherein The module bin and the upper cover are connected through a snap lock, the snap lock comprises a detachable lock body arranged on the outer wall of the module bin and a detachable buckle body arranged on the upper cover.

7. The airtightness testing device for a small battery module according to claim 6, characterized by, The side wall of the module bin is provided with a module grabbing groove, and the module grabbing groove is recessed downward from the top end of the module bin.

8. The airtightness testing device for small battery modules according to claim 6, characterized by, The module bin is provided with an obstacle avoiding groove, the obstacle avoiding groove is recessed from the inner wall of the module bin to the outer wall of the module bin, and is used for avoiding the wire harness or connector of the side wall of the battery module.

Images