Sampling detection device for sealing performance of battery steel shell

Abstract

The utility model discloses a battery steel shell sealing performance sampling detection device, which is characterized by comprising a detection water tank, the detection water tank is provided with a battery steel shell sealing performance detection mechanism, the battery steel shell sealing performance detection mechanism comprises a plurality of detection units, and each detection unit comprises a mold for discharging a battery steel shell. The detection unit further comprises a ventilation piece used for puncturing a battery steel shell to conduct ventilation detection. The ventilation piece comprises an air inlet pipe, an air inlet seat is integrally formed at the end of the air inlet pipe, and an air inlet needle tube is communicated with the air inlet seat. And in the process of puncturing the battery steel shell, the air inlet pipe is in threaded connection with the mold. According to the mode, the battery shell is detected in a simple and convenient-to-operate mode, in the detection process, the battery shell is easily punctured, the battery shell is not prone to shaking in the detection process, air leakage of the punctured position is avoided, simultaneous detection of multiple samples is achieved, and the detection efficiency is greatly improved.

Description

Technical Field

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

[0002] A battery is a device that converts electrical energy into chemical energy. Depending on the chemical materials used to produce the battery, it can be divided into lithium batteries, lead-acid batteries, etc. Among them, lithium batteries are widely used in the industry due to their many advantages such as long discharge time, long service life, and high environmental performance.

[0003] For example, as a power battery for new energy equipment, such as new energy vehicles. Among lithium batteries, cylindrical batteries are the most commonly used. Cylindrical batteries can not only be used in new energy equipment, but also as a power source for a variety of mobile devices.

[0004] The main structure of a cylindrical battery includes a sealed battery casing, a battery cell, etc. Among them, the battery casing needs to maintain sealing. Specifically, since the chemical substances are located in the battery casing, when the sealing of the battery casing is not high, the chemical substances in the battery are easy to penetrate from the battery casing, and the chemical substances in the battery are mostly chemically active substances, such as metal lithium compounds, acids and alkalis. During use, once the chemical substances in the battery penetrate, the highly active chemical substances are very likely to cause safety accidents such as battery short circuit, fire, explosion, etc.

[0005] Therefore, during the production process, the battery casings produced need to be tested for sealing. The specific method is to adopt a sampling test method. After sampling a certain number of battery casings produced in each batch, they are tested through testing equipment.

[0006] Currently, the more conventional detection method is underwater detection, which involves piercing the battery shell with a detection needle and then conducting a ventilation test. However, the disadvantages of this method are very obvious, as shown in the following: first, the needle is prone to slipping during the puncture of the cylindrical shell; second, the needle cannot remain in place after puncture, and once it becomes loose, it is prone to leaking at the puncture site, resulting in low detection accuracy; third, the efficiency is very low, as only one product can be tested in one test process, while a large number of products are produced on the assembly line, and the number of sample tests is large. This detection method is obviously difficult to meet production needs. Utility Model Content

[0007] Based on the above background, the purpose of the utility model is to provide a battery steel shell sealing sampling detection device.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A battery steel shell sealing sampling detection device, comprising a detection water tank, the detection water tank is provided with a battery steel shell sealing detection mechanism, the battery steel shell sealing detection mechanism comprises a plurality of detection units, the detection unit comprises a mold for discharging the battery steel shell, and the detection unit also comprises a venting piece for puncturing the battery steel shell for ventilation detection;

[0010] The ventilation member comprises an air inlet pipe, an air inlet seat is integrally formed at the end of the air inlet pipe, and an air inlet needle tube is connected to the air inlet seat;

[0011] During the process of puncturing the battery steel shell, the air inlet pipe is threadedly connected to the mold.

[0012] Preferably, a discharge groove for discharging the battery steel shell is provided on the top of the mold, and a threaded through hole connected to the discharge groove is provided on the side wall of the mold;

[0013] The air inlet pipe is provided with a threaded portion which is threadedly connected to the threaded through hole.

[0014] Preferably, a drive ring seat is fixedly connected to the threaded portion, and a plurality of drive handles are fixedly connected to the drive ring seat.

[0015] Preferably, the detection units are fixedly connected via a connecting piece;

[0016] The connecting piece comprises a U-shaped connecting seat symmetrically arranged on two sides, and the two sides of the U-shaped connecting seat are respectively fastened to the mold by bolts.

[0017] Preferably, a plurality of slides are fixedly connected in the detection water tank;

[0018] The slide bracket is slidably connected to the U-shaped connecting seat.

[0019] Preferably, the slide comprises a base fixedly connected to the bottom of the detection tank, the top of the base is fixedly connected with vertical slides spaced apart on both sides, and the vertical slides are slidably connected to the U-shaped connecting seat.

[0020] Preferably, the battery steel shell sealing detection mechanism further comprises a plurality of lifting cylinders assembled and connected to the top position of the detection unit;

[0021] Before the ventilation test, the detection unit is raised above the liquid surface by the lifting cylinder. During the ventilation test, the detection unit is driven down by the lifting cylinder to be immersed below the liquid surface.

[0022] Preferably, a plurality of cylinder seats are fixedly connected to the top of the detection water tank, and the lifting cylinder is fixedly assembled on the cylinder seat.

[0023] Preferably, the lower end of the side wall of the detection water tank is connected with an inlet and outlet water pipe, and the inlet and outlet water pipe is equipped with a valve.

[0024] The utility model has the following beneficial effects:

[0025] 1. During the detection process, the driving handle is rotated until the driving handle is driven, and the air inlet pipe is continuously threaded into the mold. At this time, the air inlet needle tube continues to penetrate the battery shell, and its outlet end is located in the shell cavity of the battery shell. This method can puncture the battery shell in a stable manner, and it is not easy to loosen and leak after puncture.

[0026] The above method not only detects the battery shell in a relatively simple and easy-to-operate manner, but also makes it easy to puncture the battery shell during the detection process. The battery shell is not easy to shake during the detection, resulting in air leakage at the puncture position, and multiple samples can be tested simultaneously, greatly improving the detection efficiency.

[0027] 2. During the working process, through the design of the cylinder, slide and other structures, when the cylinder is lifted, the operator punctures the battery shell according to the above embodiment and connects the air pump. When the cylinder is driven down to be immersed in water, the air pump is turned on for testing. After the test is completed, it is raised above the liquid level, the battery shell is returned, and the next batch of tests is prepared. The above method further improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the dispersed structure in the embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the ventilator in the embodiment of the utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the lifting cylinder and the slide in the embodiment of the utility model;

[0032] Figure 4 It is a schematic diagram of the dispersed structure of the mold and the ventilator in the embodiment of the utility model.

[0033] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0037] Example 1

[0038] like Figure 1-4 As shown, a battery steel shell sealing sampling detection device includes a detection water tank 1 (according to the existing method, the lower end of the side wall of the detection water tank 1 is connected with an inlet and outlet water pipe, and the inlet and outlet water pipes are equipped with valves to pass the detection water into the detection water tank 1 to maintain a certain height).

[0039] The detection water tank 1 is provided with a battery steel shell sealing detection mechanism, through which a plurality of battery shells 3 can be detected simultaneously in a simple operation and with high detection accuracy.

[0040] The specific structure of the battery steel shell sealing detection mechanism is as follows:

[0041] The battery steel shell sealing detection mechanism includes a plurality of detection units, which include a mold 21 for discharging the battery steel shell (the battery is discharged in the mold 21, and the battery shell 3 is limited in this way to avoid loosening of the battery shell 3 during the detection process, and to facilitate puncturing when the battery shell 3 is punctured for detection).

[0042] The specific method is as follows: a discharge groove 212 for discharging the battery steel shell is provided on the top of the mold 21, and a threaded through hole 212 connected to the discharge groove 212 is provided on the side wall of the mold 21. The battery shell 3 is limited in the discharge groove 212.

[0043] The above-mentioned detection unit also includes a ventilation piece 22 for puncturing the battery shell 3 for ventilation detection; the ventilation piece 22 includes an air inlet pipe 225, and the end of the air inlet pipe 225 is integrally formed with an air inlet seat 223 (the air inlet pipe 225 and the air inlet seat 223 are connected), and the air inlet seat 223 is connected to an air inlet needle tube 224.

[0044] Meanwhile, the air inlet pipe 225 is provided with a threaded portion 221 threadedly connected to the threaded through hole 212, and a driving ring seat 222 is fixedly connected to the threaded portion 221, and a plurality of driving handles 2221 are fixedly connected to the driving ring seat 222. During the inspection process, the operator rotates the driving handle 2221 until the driving handle 2221 drives the air inlet pipe 225 to continuously thread into the mold 21, and at this time, the air inlet needle tube 224 continuously penetrates into the battery shell 3, and the air outlet end thereof is located in the shell cavity of the battery shell 3.

[0045] According to the conventional method, the hose connected to the air pump is connected to the air inlet pipe 225, and the gas pumped to a certain pressure is pumped into the battery housing 3.

[0046] When the sealing performance of the shell is low, the detection tank 1 contains bubbles. According to the location of the bubbles, it is determined which detection unit's battery shell 3 is leaking, and the batch in which it is produced can be traced.

[0047] The above method not only detects the battery shell 3 in a relatively simple and easy-to-operate manner, but also makes it easy to puncture the battery shell 3 during the detection process. The battery shell 3 is not easy to shake during the detection, resulting in air leakage at the punctured position, and multiple samples can be detected simultaneously, greatly improving the detection efficiency.

[0048] Example 2

[0049] like Figure 1-4 As shown, in this embodiment, based on the structure of embodiment 1, the above detection units are fixedly connected by a connecting member. Specifically, the connecting member includes a U-shaped connecting seat 4 symmetrically arranged on the left and right sides, and the two sides of the U-shaped connecting seat 4 are respectively fastened to the mold 21 by bolts.

[0050] Meanwhile, two slides 5 spaced apart from each other are fixedly connected in the detection water tank 1 ; the slides 5 are slidably connected to the U-shaped connecting seat 4 .

[0051] The shape of the carriage 5 is:

[0052] The slide 5 includes a base fixedly connected to the bottom of the detection water tank 1, and the top of the base is fixedly connected with vertical slides spaced apart on both sides, and the vertical slides are slidably connected to the U-shaped connecting seat 4 (correspondingly, an adaptive slide groove is provided on the U-shaped connecting seat 4).

[0053] The battery steel shell sealing detection mechanism also includes two lifting cylinders 6 assembled and connected to the top of the detection unit; specifically, a cylinder is installed on the top of the front and rear end position detection unit (mold 21) respectively.

[0054] The cylinder method is used to facilitate the inspection process, immersing the entire device under the water surface, and after the inspection is completed, the material is raised and returned. This method further simplifies the operation difficulty.

[0055] Specifically, the piston rod of the lifting cylinder 6 is fixedly installed on the top of the mold 21. During the driving process, the entire device slides on the slide 5 to ensure stability.

[0056] At the same time, a plurality of cylinder seats 11 are fixedly connected to the top of the detection water tank 1 , and the lifting cylinder 6 is fixedly assembled on the cylinder seat 11 .

[0057] When the cylinder is lifted, the operator punctures the battery shell 3 in the manner of the above embodiment and connects the air pump. When the cylinder is driven down to be submerged in water, the air pump is turned on for testing. After the test is completed, the battery shell is lifted above the liquid level, and the battery shell is returned to prepare for the next batch of testing. The above method further improves the testing efficiency.

[0058] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A battery steel shell sealing sampling detection device, characterized in that: It includes a detection water tank, the detection water tank is provided with a battery steel shell sealing detection mechanism, the battery steel shell sealing detection mechanism includes a plurality of detection units, the detection unit includes a mold for discharging the battery steel shell, and the detection unit also includes a ventilation piece for puncturing the battery steel shell for ventilation detection; The ventilation member comprises an air inlet pipe, an air inlet seat is integrally formed at the end of the air inlet pipe, and an air inlet needle tube is connected to the air inlet seat; During the process of puncturing the battery steel shell, the air inlet pipe is threadedly connected to the mold.

2. The battery steel shell sealing sampling detection device according to claim 1 is characterized in that: The top of the mold is provided with a discharge groove for discharging the battery steel shell, and the side wall of the mold is provided with a threaded through hole connected to the discharge groove; The air inlet pipe is provided with a threaded portion which is threadedly connected to the threaded through hole.

3. The battery steel shell sealing sampling detection device according to claim 2, characterized in that: A driving ring seat is fixedly connected to the threaded portion, and a plurality of driving handle rods are fixedly connected to the driving ring seat.

4. The battery steel shell sealing sampling detection device according to claim 1, characterized in that: The detection units are fixedly connected via a connecting piece; The connecting piece comprises a U-shaped connecting seat symmetrically arranged on two sides, and the two sides of the U-shaped connecting seat are respectively fastened to the mold by bolts.

5. The battery steel shell sealing sampling detection device according to claim 4, characterized in that: A plurality of slides are fixedly connected in the detection water tank; The slide bracket is slidably connected to the U-shaped connecting seat.

6. The battery steel shell sealing sampling detection device according to claim 5, characterized in that: The slide frame comprises a base fixedly connected to the bottom of the detection water tank, the top of the base is fixedly connected with vertical slides spaced apart on both sides, and the vertical slides are slidably connected to the U-shaped connecting seat.

7. The battery steel shell sealing sampling detection device according to claim 5, characterized in that: The battery steel shell sealing detection mechanism also includes a plurality of lifting cylinders assembled and connected to the top position of the detection unit; Before the ventilation test, the detection unit is raised above the liquid surface by the lifting cylinder. During the ventilation test, the detection unit is driven down by the lifting cylinder to be immersed below the liquid surface.

8. The battery steel shell sealing sampling detection device according to claim 7, characterized in that: A plurality of cylinder seats are fixedly connected to the top of the detection water tank, and the lifting cylinder is fixedly assembled on the cylinder seat.

9. The battery steel shell sealing sampling detection device according to claim 1, characterized in that: The lower end of the side wall of the detection water tank is connected with an inlet and outlet water pipe, and the inlet and outlet water pipe is equipped with a valve.

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