Battery pack air tightness test equipment

Abstract

The utility model discloses a battery pack air tightness test device, which belongs to the technical field of battery pack detection, and comprises a frame, a top plate, a plurality of abutting cylinders and a connecting frame, the top plate is slidably connected with the frame, the abutting cylinders are symmetrically arranged at the frame of the top plate, the abutting cylinders are rotatably connected with the connecting frame, and the connecting frame is connected with the top plate. The abutting cylinder can roll on the side wall of the battery pack; according to the utility model, the air pipe can be quickly inserted into the large battery pack.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery pack detection technical field especially relates to a kind of battery pack air tightness test equipment. BACKGROUND

[0002] Large battery pack air tightness detection is the test method for evaluating battery system sealing performance by pressure change, mainly used to verify the sealing effectiveness of shell, interface and other key parts, prevent moisture, dust and other pollutants from invading to cause battery short circuit or corrosion 24, its core target is to provide safety guarantee for new energy automobile, energy storage system and other application scenarios, ensure that battery pack reaches IP67 and above protection level, usually adopts air pressure method to detect, but in the detection process, the air hole of large battery pack is not opposite to the air pipe of air pressure monitor frequently, leading to the air pipe cannot be inserted into the air hole of large battery pack, even leading to air pipe damage, present a kind of structure that can center positioning large battery pack. UTILITY MODEL CONTENTS

[0003] In view of the deficiencies of the prior art, the utility model provides a kind of battery pack air tightness test equipment, solves the above problems.

[0004] To achieve the above object, the utility model is realized by the following technical scheme: a kind of battery pack air tightness test equipment, including rack, further include: top plate, resist cylinder and connecting frame, the top plate is slidably connected with rack, multiple resist cylinders are respectively arranged in the top plate frame, the resist cylinder is rotatably connected with connecting frame, for making resist cylinder can roll on the lateral wall of battery pack.

[0005] Beneficial effects

[0006] The utility model provides a kind of battery pack air tightness test equipment, compared with prior art has the following beneficial effects:

[0007] The user places the battery pack on the rack, at this time the battery pack is between the plurality of resistance barrels in the initial state, then the user can start the motor, so that the screw rod fixedly connected on the motor output shaft starts to rotate at a constant speed, at this time the top plate starts to slide downward at the connection with the limiting rod, so that the top plate starts to gradually fit on the battery pack, at the same time, the user should start the plurality of motors A when the plurality of resistance barrels pass the top surface of the battery pack, at this time the screw rod fixedly connected on the motor output shaft starts to rotate at a constant speed, and drives the sliding frame connected with the screw rod to start to slide, at this time the plurality of sliding frames start to slide to the center of the top plate synchronously, so that the plurality of resistance barrels are positioned in the battery pack synchronously, and then the resistance barrel is rotatably arranged on the connecting frame, so that the resistance barrel can roll on the side wall of the battery pack after the plurality of resistance barrels position the battery pack, so as to avoid interfering with the sliding of the top plate, at the same time, when the top plate fits on the battery pack, the plurality of resistance barrels should have a certain distance from the protrusion at the bottom of the battery pack, at this time the air pipe is synchronously inserted into the air hole at the top of the battery pack, at the same time, since the air pipe is fitted with the air hole, the air tightness of the connection can be effectively increased, at the same time, after the air pipe is completely inserted into the air hole at the top of the battery pack, the pressure pad can be tightly pressed on the air hole, since the diameter of the pressure pad is larger than the diameter of the air pipe and the air hole, the pressure pad can be sealed, so as to further avoid air leakage at the connection, at this time the user can start the air tightness detector to start inflating the battery pack to detect the air tightness. BRIEF DESCRIPTION OF DRAWINGS

[0008] Fig. 1 It is a three-dimensional structure schematic diagram of the utility model.

[0009] Fig. 2 It is a whole structure schematic diagram of the utility model.

[0010] Fig. 3 It is a screw rod structure enlarged schematic diagram of the utility model.

[0011] The figure mark annotation: rack 101, top plate 201, resistance barrel 202, connecting frame 203, guide barrel 204, sliding frame 205, screw rod 206, guide rod 207, screw 208, motor A 209, screw rod 301, limiting rod 302, motor 303, air tightness detector 304, air pipe 305, pressure pad 306. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below by combining with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0013] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0014] Please see Figs. 1-3 This invention provides a battery pack airtightness testing device according to one embodiment of the present invention, including a frame 101, a top plate 201, a retaining cylinder 202, and a connecting frame 203. The top plate 201 is slidably connected to the frame 101, and a plurality of retaining cylinders 202 are symmetrically arranged at the edge of the top plate 201. The retaining cylinders 202 are rotatably connected to the connecting frame 203 to enable the retaining cylinders 202 to roll on the side wall of the battery pack.

[0015] Regarding the above examples, those skilled in the art should know that the implementation of the above technical solutions is not limited to the specific abutment 202 described in the above embodiments. For example, the abutment 202 should be made of a material with a smooth surface and a certain degree of hardness. The purpose of this setting is to avoid deformation after it comes into contact with the side wall of the battery pack, which would prevent the air holes of the battery pack from being effectively aligned with the air pipe 305. In addition, the side wall of the battery pack used in conjunction with this application should be smooth and flat, with only a raised connecting seam near the bottom.

[0016] Specifically, the connecting frame 203 is slidably connected in the guide cylinder 204, the guide cylinder 204 is fixedly connected to the slide frame 205, the slide frame 205 is threadedly connected to the lead screw 206, and the lead screw 206 is rotatably connected to the top plate 201.

[0017] Regarding the above examples, those skilled in the art should know that the implementation of the above technical solutions is not limited to the specific connecting frame 203 described in the above embodiments. For example, the connecting frame 203 should be provided with a damping rubber strip. The purpose of this arrangement is to increase the damping of the connecting frame 203 sliding in the guide cylinder 204, so that it can slide smoothly.

[0018] Specifically, the sliding frame 205 is slidably connected to the guide rod 207, the guide rod 207 is fixedly connected to the top plate 201, one end of the lead screw 206 is fixedly connected to the output shaft of the motor A209, and the motor A209 is fixedly connected to the top plate 201.

[0019] For the above examples, those skilled in the art should know that when implementing the above technical solutions, it is not limited to the specific motors A209 and 303 described in the above embodiments. For example, both motors A209 and 303 are motors with self-locking effect. The purpose of this setting is to prevent the output shaft from starting to reverse under the action of external force when it is stopped.

[0020] Specifically, a screw 208 is threaded onto the guide cylinder 204. The screw 208 is used to abut against the connecting frame 203, and the surface of the screw 208 that contacts the connecting frame 203 is designed with a sharp protrusion. After the user loosens the screw 208, he can manually pull the connecting frame 203 to adjust the relative height between the abutment cylinder 202 and the top plate 201, thereby making it adaptable to battery packs of various thicknesses.

[0021] For the above examples, those skilled in the art should know that the implementation of the above technical solutions is not limited to the specific connecting frame 203 described in the above embodiments. For example, the connecting frame 203 may be provided with multiple through holes, and the screw 208 can be inserted into the through holes. The purpose of this arrangement is to facilitate the insertion of the screw 208 into the through hole of the connecting frame 203 by rotating it, thereby adjusting the position of the connecting frame 203 on the guide cylinder 204.

[0022] Specifically, one side of the top plate 201 is threadedly connected to the screw 301, the screw 301 is rotatably connected to the frame 101, and one end of the screw 301 is fixedly connected to the output shaft of the motor 303, the motor 303 is fixedly connected to the frame 101.

[0023] Regarding the above examples, those skilled in the art should know that the implementation of the above technical solutions is not limited to the specific screw 301 described in the above embodiments. For example, the screw 301 can be a reciprocating lead screw. The purpose of this arrangement is that when the slider connected to the reciprocating lead screw moves to one end, the direction of movement of the slider can be quickly changed by continuing to control the reciprocating lead screw to rotate in the same direction.

[0024] Specifically, the other side of the top plate 201 is slidably connected to the limiting rod 302, and the limiting rod 302 is fixedly connected to the frame 101.

[0025] Regarding the above examples, those skilled in the art should know that the implementation of the above technical solutions is not limited to the specific rack 101 described in the above embodiments. For example, the rack 101 used for placing the battery pack should be provided with a smooth surface. The purpose of this setting is to facilitate the battery pack's inability to slide on the rack 101, thus preventing its position from being adjusted.

[0026] Specifically, an air tightness tester 304 is fixedly connected to the top plate 201, and an air pipe 305 is fixedly connected to the bottom of the air tightness tester 304. The air pipe 305 passes through the pressure pad 306, and the pressure pad 306 is fixedly connected to the top plate 201.

[0027] For the above examples, those skilled in the art should understand that the implementation of the above technical solutions is not limited to the specific air tightness tester 304 described in the above embodiments. For example, the air tightness tester 304 should be a high-precision air tightness tester, specifically, various models such as SS-QMJC-20 / 100K, SS-QMJC-100 / 500K, and SS-QMJC-1 / 140M can be selected. The air tube 305 should fit in close to the air vent on the battery pack. The air tightness tester 304 should maintain an inflation time of about 60 seconds to avoid excessive inflation and impact, and maintain a pressure stabilization time of about 60 seconds to ensure that the pressure is stable before entering the testing stage. The test time should be maintained for 10 seconds to monitor pressure changes. The leakage threshold is usually set to ≤100Pa, that is, a leakage value less than or equal to 100Pa indicates that the battery pack has good air tightness.

[0028] In this embodiment of the invention, the user places the battery pack on the frame 101. Initially, the battery pack is positioned between multiple abutment cylinders 202. The user then starts the motor 303, causing the screw 301 fixedly connected to the output shaft of the motor 303 to rotate at a constant speed. Since the top plate 201 is threadedly connected to the screw 301, the top plate 201 begins to slide downwards along its connection with the limiting rod 302, gradually fitting the top plate 201 against the battery pack. To prevent the air tube 305 from failing to accurately insert into the air vent of the battery pack, the user should simultaneously start multiple motors A209 as the multiple abutment cylinders 202 pass the top surface of the battery pack. At this time, the lead screw 206 fixedly connected to the output shaft of motor A209 begins to rotate at a constant speed, driving the threaded sliding frame 205 to slide. The multiple sliding frames 205 then slide synchronously towards the center of the top plate 201, causing the multiple abutment cylinders 202 to move synchronously against the sides of the battery pack. The battery pack is centered and positioned by contacting the wall. Since the abutment 202 is rotatably mounted on the connecting frame 203, after the battery pack is positioned by multiple abutment 202s, the abutment 202 can roll on the side wall of the battery pack, thus avoiding interference with the sliding of the top plate 201. At the same time, when the top plate 201 is attached to the battery pack, the multiple abutment 202s should be a certain distance from the protrusion at the bottom of the battery pack. At this time, the air tube 305 is simultaneously inserted into the air hole at the top of the battery pack. Since the air tube 305 is attached to the air hole, it can effectively increase the airtightness of the connection. After the air tube 305 is fully inserted into the air hole at the top of the battery pack, the pressure pad 306 can be pressed against the air hole. Since the diameter of the pressure pad 306 is larger than the diameter of the air tube 305 and the air hole, it can seal them, thereby further preventing air leakage at the connection. At this time, the user can start the airtightness tester 304 to start inflating the battery pack for airtightness testing.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] The term "fixed connection" as used in this application refers to a connection in which parts or components are fixed without any relative movement. This includes both detachable and non-detachable connections.

[0031] (1) Detachable connection: Components are fixed together using screws, splines, wedges, etc. This type of connection allows for disassembly during maintenance without damaging the parts. However, the specifications of the connectors used must be correct.

[0032] (Such as the length of bolts, keys, and wedges), and tighten them properly.

[0033] (2) Non-removable connections: These mainly refer to welding, riveting, and tenon joints. Since disassembly requires forging, sawing, or oxy-acetylene cutting for repair or replacement, these parts generally cannot be reused. Furthermore, during connection, [the following should be noted]:

[0034] Pay attention to process quality, technical testing, and remedial measures (such as correction, polishing, etc.).

[0035] The sliding connection referred to in this application means that the component can slide along a linear trajectory, and the hinge referred to in this application means that the component can rotate along an axial constraint.

[0036] In some cases, the sliding connection and hinge referred to in this application may also be damped, enabling the component to maintain in the desired position.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery pack air tightness testing apparatus comprising a rack (101), characterized in that, Also include: The top plate (201), the resistance cylinder (202) and the connecting frame (203), the top plate (201) is connected with the rack (101) slidingly, multiple resistance cylinders (202) are respectively arranged symmetrically at the frame of the top plate (201), the resistance cylinder (202) is rotatably connected with the connecting frame (203), for enabling the resistance cylinder (202) to roll on the battery pack side wall, the connecting frame (203) is slidably connected in the guide cylinder (204), the guide cylinder (204) is fixedly connected with the sliding frame (205), the sliding frame (205) is threadedly connected on the lead screw (206), the lead screw (206) is rotatably connected with the top plate (201), the sliding frame (205) is slidably connected with the guide rod (207), the guide rod (207) is fixedly connected with the top plate (201), one end of the lead screw (206) is fixedly connected on the output shaft of motor A (209), the motor A (209) is fixedly connected with the top plate (201).

2. The battery pack air tightness testing apparatus of claim 1, wherein, The guide cylinder (204) is threadedly connected with a screw (208), and the screw (208) is used for abutting and connecting the connecting frame (203).

3. The battery pack air tightness testing apparatus of claim 1, wherein, One side of the top plate (201) is threadedly connected on a screw rod (301), the screw rod (301) is rotatably connected with the rack (101), and one end of the screw rod (301) is fixedly connected on the output shaft of a motor (303), and the motor (303) is fixedly connected with the rack (101).

4. The battery pack air tightness testing apparatus of claim 1, wherein, The other side of the top plate (201) is slidably connected on a limiting rod (302), and the limiting rod (302) is fixedly connected with the rack (101).

5. The battery pack air tightness testing apparatus of claim 1, wherein, The top plate (201) is fixedly connected with an air tightness detector (304), the air tightness detector (304) is fixedly connected with an air pipe (305) at the bottom, the air pipe (305) penetrates through a pressing pad (306), and the pressing pad (306) is fixedly connected with the top plate (201).

6. The battery pack air tightness testing apparatus of claim 1, wherein, The connecting frame (203) is provided with a damping rubber strip.

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