CN204612883U - A kind of lithium ion battery leakage detection apparatus - Google Patents

Abstract

The utility model relates to lithium ion battery production technical field, is specifically related to a kind of lithium ion battery leakage detection apparatus.Comprise: support, push-pull device at fixed, vacuum valve, equalizer valve and detection part; Described push-pull device at fixed is arranged on described support, can move up and down along described support; Described vacuum valve and equalizer valve are arranged at the top of described support; Described detection part is arranged on described push-pull device at fixed, and is communicated with equalizer valve with described vacuum valve; Described vacuum valve is connected with outside vacuum extractor, and described equalizer valve is connected with outside aerating device.A kind of lithium ion battery leakage detection apparatus that the utility model provides, judge whether electric leakage pond to be checked leakage occurs according to positive/negative-pressure principle, the utility model scheme is adopted to not only increase accuracy of detection, can detect multiple battery simultaneously simultaneously, improve leak detection efficiency, and the lower easy maintenance of plant failure rate that the utility model provides.

Description

Lithium-ion battery leak detection device

technical field

The utility model relates to the technical field of lithium ion battery production, in particular to a lithium ion battery leak detection device.

Background technique

Due to its high working voltage, small size, light weight, high energy, no memory effect, no pollution, small self-discharge, and long cycle life, lithium-ion batteries are ideal energy sources for development in the 21st century. During the preparation process of lithium-ion batteries, the airtightness of the batteries is an important indicator to determine whether the batteries are qualified. Therefore, it is one of the indispensable processes in the preparation process of lithium-ion batteries to conduct a leak test on the batteries.

After the lithium-ion aluminum case battery is put into the case, it needs to be laser welded to connect the cover plate with the aluminum case. After laser welding is used, missing welding, explosive spots, and excessive welding penetration are prone to occur at the welding place. These phenomena are caused by the instability of laser welding power and frequency. The main harm caused: the battery is prone to leakage after liquid injection, so that the insufficient electrolyte inside the battery affects the electrochemical performance of the lithium-ion battery.

Traditional lithium-ion battery leak detection devices are mainly controlled by contactors and external circuit boards. However, as the daily output of lithium-ion batteries continues to increase, traditional leak detection devices are gradually unable to adapt to modern production. The control buttons on the panel of the traditional leak detection device are complicated, and it takes a long time for the operator to master the operation sequence. There are many discrete components on the circuit board, and the circuit is complicated, so there are many faults and high maintenance costs; there are few stations, and the general operator can only control One, and some actions need to be completed manually, which is labor-intensive, and cannot be connected with the previous process to form an automatic assembly line, so the production efficiency is greatly limited.

Utility model content

Aiming at the defects of the existing lithium-ion battery leak detection device, such as high labor intensity, few workstations, frequent faults and difficult maintenance, the utility model provides a lithium-ion battery leak detection device.

The utility model provides a lithium-ion battery leak detection device, comprising: a bracket, a push-pull device, a vacuum valve, a pressure charging valve and a detection component;

The push-pull device is set on the support and can move up and down along the support; the vacuum valve and the pressure valve are set on the top of the support; the detection component is set on the push-pull device and is connected with the The vacuum valve and the charging valve are connected;

The vacuum valve is connected with an external vacuum device, and the pressure charging valve is connected with an external inflation device.

Further, the detection component includes an air delivery pipe, a pressure gauge and an air inlet; one end of the air delivery pipe is connected to the vacuum valve and the ram valve, and the other end is connected to the air inlet and a pressure gauge; the pressure gauge shows that the output pressure inside the trachea.

Further, the device includes multiple sets of detection components.

Further, the detection component also includes a gas delivery pipe switch, which is arranged on the upper end of the bracket to control the opening and closing of the gas delivery tube corresponding to the detection component.

Further, the push-pull device includes a cylinder, a cylinder valve, a push-pull rod and a movable box;

Wherein, the cylinder and the cylinder valve are arranged on the upper end of the bracket, and the movable box can move up and down along the bracket under the action of the push-pull rod.

Further, the detection component is arranged on the movable box of the push-pull device.

Further, the gas delivery pipe of the detection component is arranged inside the movable box, the pressure gauge is arranged at the upper end of the movable box, and the air inlet is arranged at the lower end of the movable box .

Further, the lower end of the bracket is provided with a battery fixing part, which is used to fix the battery to be leaked and align it with the air inlet.

The utility model provides a lithium-ion battery leak detection device. The push-pull device controls the detection part to move to be in close contact with the battery to be leaked. First, the vacuum valve connected to the external vacuum device is opened to give the battery to be leaked a negative pressure. Then open the charging valve connected with the external inflation device to give a positive pressure to the leaking battery to be checked, and judge whether the leaking battery to be checked leaks according to the principle of positive and negative pressure. Adopting the solution of the utility model not only improves the detection accuracy, but also can detect multiple batteries at the same time, which improves the leak detection efficiency, and the device provided by the utility model has a low failure rate and is easy to maintain.

Description of drawings

The features and advantages of the present utility model can be more clearly understood by referring to the accompanying drawings. The accompanying drawings are schematic and should not be construed as any limitation to the present utility model. In the accompanying drawings:

Fig. 1 is a structural schematic diagram of a lithium-ion battery leak detection device in an embodiment of the present invention.

Detailed ways

The technical scheme of the utility model is now further elaborated in conjunction with the accompanying drawings and embodiments.

Figure 1 shows a schematic structural view of a lithium-ion battery leak detection device in this embodiment. As shown in Figure 1, a lithium-ion battery leak detection device provided in this embodiment includes: a bracket 1, a cylinder 2, a cylinder Valve 3, push-pull rod 4, movable box body 5, vacuum valve 6, pressure charging valve 7, pressure gauge 8, air inlet 9, air pipe switch 10 and fixed part 11 of the battery to be leaked.

The cylinder 2 and the cylinder valve 3 are arranged on the upper end of the support 1, and the cylinder 2 realizes the moving of the movable box 5 up and down along the support 1 by controlling the movement of the push-pull rod 4. Furthermore, the height of the detection component is controlled so that the air inlet 9 is in close contact with the leaking battery to be detected.

The vacuum valve 6 and the charging valve 7 are also arranged on the upper end of the bracket 1, the vacuum valve 6 is connected with an external vacuum device, and provides a negative pressure to the battery to be leaked through the external vacuum device; The pressure valve 7 is connected with an external inflation device, and a positive pressure is provided to the battery to be leaked through the external inflation device.

The pressure gauge 8 and the air inlet 9 are arranged on the movable box body 5, and communicate with the vacuum valve 6 and the pressure filling valve 7 through an air pipe. In this embodiment, the leak detection device shown in FIG. 1 is a device capable of testing six leak-testing batteries at the same time. Among them, six pressure gauges 8 and six air inlets 9 are included. At the same time, six air pipe switches 10 are correspondingly arranged on the upper end of the bracket 1. The pressure gauges 8, air inlets 9 and air pipe switches 10 are one by one. correspond. Each pressure gauge 8 shows the pressure value of the leaking battery to be detected detected by the corresponding air inlet 9 during vacuuming and inflation, and the corresponding air pipe switch 10 can control the opening and closing of the controlled air pipe. When the number of batteries to be leaked is less than six, the corresponding air pipes are closed to prevent the influence of other idle air pipes on the detection air pipes and ensure the accuracy of detection.

The lower end of the bracket 1 is also provided with a fixed part 11 for fixing the battery to be leaked. Similarly, the number of the fixed parts 11 is equal to the number of the air inlets 9, and they are aligned up and down to ensure that the movable box 5 After moving down, the air inlet 8 is aligned with the battery with leak detection.

When using the above-mentioned device to detect the leaking battery, open the cylinder valve 3 to make the cylinder 2 control the push-pull rod 4 to drive the movable box 5 to move downward, so that the air inlet 9 at the lower end of the movable box 5 is connected to the fixed part 11. close contact with the leaking battery to be checked; open the air pipe switch 10 corresponding to the air inlet 9 used.

Further first open the vacuum valve 6 to give the battery to be leaked a negative pressure value, and record the reading of the pressure gauge 8, then close the vacuum valve 6 and open the pressure valve 7, and then give the battery to be leaked a positive pressure equal to the negative pressure value. Pressure value, read the reading of pressure gauge 8 again. If the two readings of the pressure gauge are exactly opposite to each other, it means that the battery to be leaked is welded well and no liquid leakage occurs;

In the lithium-ion battery leak detection device provided in this embodiment, the detection part is controlled by a push-pull device to move into close contact with the battery to be leaked. First, the vacuum valve connected to the external vacuum device is opened to give the battery to be leaked a negative pressure. Then open the charging valve connected with the external inflation device to give a positive pressure to the leaking battery to be checked, and judge whether the leaking battery to be checked leaks according to the principle of positive and negative pressure. Adopting the solution of this embodiment not only improves the detection accuracy, but also can detect multiple batteries at the same time, which improves the leak detection efficiency, and the device provided by the utility model has a low failure rate and is easy to maintain.

Although the embodiment of the utility model has been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the utility model, and such modifications and variations all fall into the scope of the present utility model. within the scope of the appended claims.

Claims (8)

1. A lithium-ion battery leak detection device, characterized in that the device comprises: a support, a push-pull device, a vacuum valve, a charging valve and a detection component; The push-pull device is set on the support and can move up and down along the support; the vacuum valve and the pressure valve are set on the top of the support; the detection component is set on the push-pull device and is connected with the The vacuum valve and the charging valve are connected; The vacuum valve is connected with an external vacuum device, and the pressure charging valve is connected with an external inflation device. 2. The device according to claim 1, wherein the detection component comprises an air delivery pipe, a pressure gauge and an air inlet; one end of the air delivery pipe is connected to the vacuum valve and the stamping valve, and the other end is connected to the Air port and pressure gauge; said pressure gauge shows the pressure inside the gas delivery pipe. 3. The device according to claim 2, characterized in that the device comprises multiple sets of detection components. 4. The device according to claim 2 or 3, wherein the detection part further comprises a gas delivery pipe switch, and the gas delivery pipe switch is arranged on the upper end of the bracket to control the opening and closing of the gas delivery pipe corresponding to the detection part. combine. 5. The device according to claim 2 or 3, wherein the push-pull device comprises a cylinder, a cylinder valve, a push-pull rod and a movable box; Wherein, the cylinder and the cylinder valve are arranged on the upper end of the bracket, and the movable box can move up and down along the bracket under the action of the push-pull rod. 6 . The device according to claim 5 , wherein the detection component is arranged on a movable box of the push-pull device. 7 . 7. The device according to claim 6, characterized in that, the air delivery pipe of the detection component is arranged inside the movable box, the pressure gauge is arranged at the upper end of the movable box, and the The air inlet is arranged at the lower end of the movable box. 8. The device according to claim 7, characterized in that a battery fixing part is provided at the lower end of the bracket for fixing the battery to be leaked to be aligned with the air inlet.