Battery cap testing device

Abstract

The utility model relates to the technical field of battery cap testing, in particular to a battery cap testing device which comprises a pressing and covering mechanism, a detecting mechanism and an auxiliary mechanism, an electric telescopic rod arranged on the pressing and covering mechanism drives an upper die cylinder to move downwards, so that a pressing and covering plate and a sealing washer are pressed and covered at the top end of a lower die cylinder; through a nitrogen tank, a ventilation hose, a detection pipe and a transparent water tank which are arranged on the detection mechanism, a control valve is opened, the air pressure is observed in real time by observing a pressure gauge, and through continuous pressurization, according to the breaking point and blasting condition of the cover cap, the battery cover cap is fixed, and the sealing effect of the air inlet cavity and the air outlet cavity is achieved. And the breaking point and the bursting pressure value of the battery cap can be judged. Meanwhile, whether the battery cap is damaged due to air leakage or not can be judged according to whether bubbles appear in the transparent water tank or not. In the actual using process, the detection mode is simple in structure and convenient to operate, meanwhile, the air tightness and the pressure bearing value of the battery cap can be detected, and the practical effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cap testing, in particular to a battery cap testing device. Background Art

[0002] The rapid development of the new energy industry has driven the rapid development of lithium-ion batteries. Currently, cylindrical lithium-ion batteries have a large market worldwide, especially in new energy vehicles, energy storage, and electric bicycles. The battery cap breakpoint and burst pressure value determine whether the cylindrical lithium-ion battery can quickly cut off the circuit when an abnormal problem occurs, ensuring that there is no battery explosion problem, thereby playing a safety protection role. However, there is currently a lack of convenient battery cap burst pressure value and airtightness test devices on the market.

[0003] For example, a battery cap pressure testing device disclosed in the authorization announcement number CN218566746U has an upper mold connected to the workbench through a bracket, the upper mold corresponds to the upper part of the lower mold, the upper end of the lower mold inner cavity is an open column cavity structure, one side of the column cavity is connected to the air inlet pipe, and the other side is connected to the pressure-maintaining cavity column through the pressure-maintaining air pipe, a pressure-maintaining pressure gauge is arranged on the pressure-maintaining cavity column, the pressure-maintaining cavity column is also connected to the pressure-relief cavity column through a safety pipeline, a pressure-relief pressure gauge is arranged on the pressure-relief cavity column, and the pressure-relief cavity column is also externally connected to a pressure-relief pipeline with a pressure-relief solenoid valve; the controller is connected to the air inlet solenoid valve, an air compressor, and a pressure-relief solenoid valve; an inner concave step is arranged at the upper end of the column cavity, and a flexible gasket is placed on the inner concave step; the upper mold is connected to the bracket through the upper mold seat, the upper mold includes a lifting mechanism and a die head, and the die head is connected to the lower end of the lifting mechanism corresponding to the cap placed on the flexible gasket, and its structure is simple, can effectively take into account the universal test of caps of different specifications, and can monitor the pressing pressure and safe pressure relief in real time, thereby improving the safety and accuracy of the test. However, the utility model has a complex structure and a single function, and can only test the pressure-bearing value of the cap. Therefore, we propose a battery cap testing device, which simplifies the device structure and adds an airtightness testing function, thereby improving the practical effect of the utility model. Utility Model Content

[0004] The purpose of the utility model is to provide a battery cap testing device to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A battery cap testing device includes a pressing mechanism, a detection mechanism, and an auxiliary mechanism. The detection mechanism is located on both sides of the pressing mechanism. The pressing mechanism includes an electric telescopic rod, an upper die cylinder, an air inlet cavity, a pressing plate, a sealing gasket, a connecting air hole, a lower die cylinder, a cap placement groove, and an air outlet cavity. The upper die cylinder is fixedly installed at the bottom end of the electric telescopic rod. An air inlet cavity is arranged inside the upper die cylinder. The pressing plate is arranged at the bottom end of the upper die cylinder. The sealing gasket is installed outside the pressing plate. The connecting air hole is arranged on one side of the upper die cylinder and is communicated with the air inlet cavity. The lower die cylinder is arranged directly below the upper die cylinder. A cap placement groove is arranged at the top end of the lower die cylinder. An air outlet cavity is arranged inside the lower die cylinder. The detection mechanism includes a nitrogen tank, a ventilation hose, a pressure gauge, a control valve, a detection tube, an extension tube, and a transparent water tank. The ventilation hose is connected between the nitrogen tank and the connecting air hole. The pressure gauge and the control valve are installed on the ventilation hose.

[0007] Preferably, the air outlet cavity and the transparent water tank are communicated through the detection tube. One end of the extension tube is communicated with the detection tube, and the other end extends into the bottom of the transparent water tank.

[0008] Preferably, the auxiliary mechanism includes a fixation support frame, a workbench, legs, a controller, and a liquid level marking line.

[0009] Preferably, the fixation support frame is fixedly connected between the ventilation hose and the workbench. The legs are fixedly installed at the bottom end of the workbench.

[0010] Preferably, the controller is fixedly installed on one side of the workbench and is electrically connected to the electric telescopic rod.

[0011] Preferably, the liquid level marking line is arranged on one side of the transparent water tank.

[0012] Preferably, the top end of the electric telescopic rod is fixedly installed on the top of the workbench.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. For this battery cap testing device, through the cap placement groove arranged in the lower die cylinder, the battery cap is placed in the placement groove. Then, the electric telescopic rod arranged in the pressing mechanism drives the upper die cylinder to move downward, so that the pressing plate and the sealing gasket press on the top end of the lower die cylinder, realizing the fixation of the battery cap and the airtight effect between the air inlet cavity and the air outlet cavity.

[0015] 2. The battery cap testing device, through the nitrogen tank, ventilation hose, pressure gauge, control valve, detection tube and transparent water tank set by the detection mechanism, opens the control valve, observes the air pressure in real time through the pressure gauge, and after continuous pressurization, according to the breaking point and bursting situation of the cap, the breaking point and bursting pressure value of the battery cap can be judged. At the same time, according to whether there are bubbles in the transparent water tank, it can be judged whether the battery cap has air leakage and damage. In the actual use process, this detection method not only has a simple structure and convenient operation, but also can detect the air tightness and pressure bearing value of the battery cap at the same time, and has better practical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is a front view structure schematic diagram of the present invention;

[0018] Figure 3 is a schematic diagram of the lower die cylinder structure of the present invention;

[0019] Figure 4 is a schematic diagram of the upper die cylinder structure of the present invention.

[0020] In the figure: 100, electric telescopic rod; 101, upper die cylinder; 102, intake cavity; 103, pressing plate; 104, sealing gasket; 105, connecting air hole; 106, lower die cylinder; 107, cap placement groove; 108, air outlet cavity; 200, nitrogen tank; 201, ventilation hose; 202, pressure gauge; 203, control valve; 204, detection tube; 205, extension tube; 206, transparent water tank; 300, retention support frame; 301, workbench; 302, support leg; 303, controller; 304, liquid level mark. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1 - 4 as shown, a technical solution provided by the present invention:

[0023] A battery cap testing device includes a pressing mechanism, a detection mechanism, and an auxiliary mechanism. The detection mechanism is located on both sides of the pressing mechanism. The pressing mechanism includes an electric telescopic rod 100, an upper die cylinder 101, an air inlet cavity 102, a pressing plate 103, a sealing gasket 104, a connecting air hole 105, a lower die cylinder 106, a cap placement groove 107, and an air outlet cavity 108. The upper die cylinder 101 is fixedly installed at the bottom end of the electric telescopic rod 100. An air inlet cavity 102 is arranged inside the upper die cylinder 101. The pressing plate 103 is arranged at the bottom end of the upper die cylinder 101. The sealing gasket 104 is installed on the outer side of the pressing plate 103. The connecting air hole 105 is arranged on one side of the upper die cylinder 101 and communicates with the air inlet cavity 102. The lower die cylinder 106 is arranged directly below the upper die cylinder 101. A cap placement groove 107 is arranged at the top end of the lower die cylinder 106. An air outlet cavity 108 is arranged inside the lower die cylinder 106. The detection mechanism includes a nitrogen gas tank 200, a ventilation hose 201, a pressure gauge 202, a control valve 203, a detection tube 204, an extension tube 205, and a transparent water tank 206. The ventilation hose 201 is connected between the nitrogen gas tank 200 and the connecting air hole 105. The pressure gauge 202 and the control valve 203 are installed on the ventilation hose 201.

[0024] In this embodiment, preferably, the air outlet cavity 108 and the transparent water tank 206 are communicated through the detection tube 204. One end of the extension tube 205 is communicated with the detection tube 204, and the other end extends into the bottom of the transparent water tank 206.

[0025] In this embodiment, preferably, the auxiliary mechanism includes a retention support frame 300, a workbench 301, legs 302, a controller 303, and a liquid level marking 304.

[0026] In this embodiment, preferably, the retention support frame 300 is fixedly connected between the ventilation hose 201 and the workbench 301. The legs 302 are fixedly installed at the bottom end of the workbench 301.

[0027] In this embodiment, preferably, the controller 303 is fixedly installed on one side of the workbench 301 and is electrically connected to the electric telescopic rod 100.

[0028] In this embodiment, preferably, the liquid level marking 304 is arranged on one side of the transparent water tank 206.

[0029] In this embodiment, preferably, the top end of the electric telescopic rod 100 is fixedly installed on the top of the workbench 301.

[0030] When a battery cap testing device of this embodiment is in use, first, the battery cap is placed in the cap placement groove 107 provided in the lower die cylinder 106. Then, the electric telescopic rod 100 provided by the pressing mechanism drives the upper die cylinder 101 to move downward, so that the pressing plate 103 and the sealing gasket 104 are pressed on the top of the lower die cylinder 106, achieving the fixation of the battery cap and the sealing effect between the air inlet cavity 102 and the air outlet cavity 108. Through the nitrogen tank 200, the ventilation hose 201, the pressure gauge 202, the control valve 203, the detection tube 204 and the transparent water tank 206 provided by the detection mechanism, the control valve 203 is opened, and the pressure gauge 202 is observed in real time to observe the pressure magnitude. After continuous pressurization, according to the break point and bursting situation of the cap, the break point and bursting pressure value of the battery cap can be judged. At the same time, according to whether there are bubbles in the transparent water tank 206, it can be judged whether the battery cap has air leakage and damage. In the actual use process, this detection method not only has a simple structure and convenient operation, but also can detect the air tightness and pressure bearing value of the battery cap at the same time, and has a better practical effect.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery cap testing device, comprising a pressing mechanism, a detection mechanism and an auxiliary mechanism, characterized in that: The detection mechanism is located on both sides of the pressing mechanism. The pressing mechanism includes an electric telescopic rod (100), an upper die cylinder (101), an air inlet cavity (102), a pressing plate (103), a sealing gasket (104), a connecting air hole (105), a lower die cylinder (106), a cap placement groove (107), and an air outlet cavity (108). The upper die cylinder (101) is fixedly installed at the bottom end of the electric telescopic rod (100). An air inlet cavity (102) is arranged inside the upper die cylinder (101). The pressing plate (103) is arranged at the bottom end of the upper die cylinder (101). The sealing gasket (104) is installed on the outer side of the pressing plate (103). The connecting air hole (105) is arranged on one side of the upper die cylinder (101) and communicates with the air inlet cavity (102). The lower die cylinder (106) is arranged directly below the upper die cylinder (101). A cap placement groove (107) is arranged at the top end of the lower die cylinder (106). An air outlet cavity (108) is arranged inside the lower die cylinder (106). The detection mechanism includes a nitrogen gas cylinder (200), a ventilation hose (201), a pressure gauge (202), a control valve (203), a detection tube (204), an extension tube (205), and a transparent water tank (206). The ventilation hose (201) is connected between the nitrogen gas cylinder (200) and the connecting air hole (105). The pressure gauge (202) and the control valve (203) are installed on the ventilation hose (201).

2. The battery cap testing device according to claim 1, wherein: The air outlet cavity (108) and the transparent water tank (206) are communicated through the detection tube (204). One end of the extension tube (205) is communicated with the detection tube (204), and the other end extends into the bottom of the transparent water tank (206).

3. The battery cap testing device according to claim 1, characterized in that: The auxiliary mechanism includes a retention support frame (300), a workbench (301), legs (302), a controller (303), and a liquid level marking line (304).

4. The battery cap testing device according to claim 3, characterized in that: The retention support frame (300) is fixedly connected between the ventilation hose (201) and the workbench (301). The legs (302) are fixedly installed at the bottom end of the workbench (301).

5. The battery cap testing device according to claim 3, wherein: The controller (303) is fixedly installed on one side of the workbench (301) and is electrically connected to the electric telescopic rod (100).

6. The battery cap testing device according to claim 3, characterized in that: The liquid level marking line (304) is arranged on one side of the transparent water tank (206).

7. A battery cap testing device according to claim 1, characterized in that: The top end of the electric telescopic rod (100) is fixedly installed at the top of the workbench (301).

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