Test bed and test method for preventing lithium battery from firing during test

Abstract

The invention discloses a test bed and a test method for preventing a lithium battery from firing during a test, the test bed comprises a water bath, cover plates are fixed at two ends of the top of the water bath, and a gap is arranged between the top of the water bath and the corresponding cover plate; the two groups of test bed plates are respectively hinged to the cover plates on the corresponding sides, the two groups of test bed plates can be opened and closed to shield the notches, and electric hinges are connected between the test bed plates and the cover plates; the test battery is placed on the test bed plate, and the test battery is connected with a temperature sensor; the controller is fixed on the cover plate and is respectively in electric signal connection with the temperature sensor and the electric hinge, and during a test, when the temperature of the test battery is too high and exceeds a design value, the controller can control the electric hinge to enable the test bed plate to turn over and the test battery to fall into the water bath, so that fire and explosion of the battery due to high temperature are avoided, and the service life of the battery is prolonged. And the test safety is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of battery detection, and in particular relates to a test bench and a test method for preventing lithium batteries from catching fire during testing. Background Art

[0002] Lithium batteries are batteries that use lithium metal or lithium alloys as the positive and negative electrode materials and a non-aqueous electrolyte solution. With the rapid development of industries such as mobile phones, laptops, digital cameras, electric vehicles, power tools, and new energy vehicles, demand for lithium batteries is expected to continue to grow. Furthermore, due to technological innovations by lithium battery manufacturers, demand for lithium batteries will continue to grow. Lithium batteries offer advantages such as high energy consumption, long service life, light weight, and low self-discharge rates. However, lithium batteries have poor safety features and pose a risk of explosion and high-temperature operation, requiring extreme performance testing. During laboratory testing, lithium batteries present the risk of explosion and fire.

[0003] Therefore, how to provide a test bench and test method that can prevent lithium batteries from catching fire during testing is an urgent problem that those skilled in the art need to solve. Summary of the Invention

[0004] In view of this, the present invention provides a test bench and test method for preventing lithium batteries from catching fire during testing, which can avoid fire and explosion caused by high temperature in the test battery, reduce the risk of explosion and fire during lithium battery testing, and improve test safety.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a test bench for preventing lithium batteries from catching fire during testing, comprising:

[0006] A water bath, with cover plates fixed at both ends of the top of the water bath, and a gap is provided between the top of the water bath and the cover plates;

[0007] Test bench panels, comprising two groups hinged to the cover panels on the corresponding sides, the two groups of test bench panels being able to open and close to cover the gaps, and electric hinges being connected between the test bench panels and the cover panels;

[0008] A test battery, the test battery being placed on the test bench and connected to a temperature sensor;

[0009] A controller is fixed on the cover and is respectively connected to the temperature sensor and the electric hinge via electrical signals.

[0010] The beneficial effects of the present invention are as follows: during specific implementation, clean water is contained inside the water bath, and the clean water is used to immerse the battery when it falls later to prevent it from catching fire and exploding. Specifically, the test bench plate can be hinged on the cover plate, and the test bench plate can be opened and closed to cover the gap at the top of the water bath. When the test battery is abnormally high in temperature, the electric hinge controls the rotation of the test bench plate, thereby dropping the test battery into the water bath, thereby improving the safety of the test.

[0011] Preferably, there is a gap between the two ends of the test bench and the inner wall of the water bath, and there is a gap between the adjacent side ends of the two groups of test benches, and the test batteries are placed on the two groups of test benches.

[0012] The resulting technical effect is that there is a gap between the two ends of the test bench plate and the inner wall of the water bath, which is the key to ensuring the smooth flipping of the test bench plate. In addition, there is a gap between the side ends of the two sets of test bench plates to achieve the open state of the two sets of test bench plates, thereby ensuring that the test battery falls smoothly into the water bath.

[0013] Preferably, a heat transfer metal sheet is fixedly connected to the outer side wall of the test battery, and the temperature sensor is fixed on the heat transfer metal sheet.

[0014] The resulting technical effect is that the heat transfer metal sheet is not only the installation basis of the temperature sensor, but also can effectively transfer the heat of the battery to the temperature sensor, thereby realizing battery temperature detection.

[0015] The present invention also discloses a test method for preventing a lithium battery from catching fire during a test, which uses the above-mentioned test bench and includes the following steps:

[0016] Step 1: Assemble the test bench and install the test bench plate on the cover plate. In the idle state, the test bench plate is vertically downward. In the experimental state, the test bench plate is controlled by an electric hinge to be in a horizontal state and covers the gap on the top of the water bath;

[0017] Step 2: Prepare the experiment. Pour clean water into the water bath through the gap until the water level is higher than the height of the test battery. Drive the two sets of test platforms to a horizontal state with the electric hinge, and place the test battery in the middle of the two sets of test platforms.

[0018] Step 3: Connect the detection device for testing. Install the temperature sensor on the outer wall of the test battery and establish a signal connection with the controller. When the temperature of the test battery reaches the set temperature during the test, the temperature sensor will feed back the signal to the controller. The controller controls the electric hinge and causes the test bench to hang freely. The test battery falls into the water bath to avoid fire and explosion of the test battery.

[0019] The beneficial effect of the present invention is that when the temperature of the test battery rises abnormally and exceeds the threshold during the test, the controller will control the electric hinge to cause the test table to flip and hang down, so that the test battery falls into the water bath, avoiding fire and explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of a test bench for preventing lithium batteries from catching fire during testing according to the present invention.

[0021] 1 water bath, 2 cover plate, 3 test bench plate, 4 test battery, 5 heat transfer metal sheet, 6 temperature sensor, 7 controller, DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See the attached Figure 1 According to an embodiment of the present invention, a test bench for preventing a lithium battery from catching fire during a test comprises:

[0024] Water bath 1, the water bath 1 is a rectangular parallelepiped, 800mm to 1000mm long, 500mm to 800mm wide, and 400 to 500mm high; cover plates 2 are fixed at both ends of the top of the water bath 1, and the length of the cover plates 2 corresponding to the length of the water bath 1 is 150mm to 250mm, and a gap is formed between the top of the water bath 1 and the corresponding cover plates 2;

[0025] The test platform 3 has two groups of test platforms 3 and is hinged to the cover plate 2 on the corresponding side. The width of the test platform is slightly smaller than the internal width of the water bath and is 250-300mm long. When the test platform is horizontal, it can just serve as the cover plate of the water bath, allowing a 5-10mm gap between the two groups of test platforms. In the absence of external force, the test platform maintains a vertical state by its own gravity. The two groups of test platforms 3 can open and close to cover the gap. An electric hinge is connected between the test platform and the cover plate 2, which can support and control the horizontal state of the test platform;

[0026] A test battery 4 is placed on the test bench 3 and is connected to a temperature sensor 6;

[0027] The controller 7 is fixed on the cover plate 2 and is respectively connected to the temperature sensor 6 and the electric hinge via electrical signals.

[0028] During the specific test, a heat transfer metal sheet 5 is fixedly connected to the outer wall of the test battery 4, and the temperature sensor 6 is fixed on the heat transfer metal sheet 5. During the test, the temperature sensor is wrapped around the side surface of the lithium battery through the metal sheet, and the battery temperature is transmitted to the temperature sensor through the metal sheet.

[0029] The present invention discloses a test method for preventing lithium batteries from catching fire during testing, which uses the above-mentioned test bench and includes the following steps:

[0030] Step 1: Assemble the test bench and install the test bench plate on the cover. In the idle state, the test bench plate is vertically downward. In the experimental state, the test bench plate is controlled by the electric hinge to a horizontal state and covers the gap on the top of the water bath;

[0031] Step 2: Prepare the experiment. Pour clean water into the water bath through the gap. The water level should be at least 300mm, slightly higher than the height of the test battery. Turn on the power so that the electric hinge drives the two sets of test plates to a horizontal state. Place the test battery in the middle of the two sets of test plates.

[0032] Step 3: Connect the detection device for testing. Install the temperature sensor on the outer wall of the test battery and establish a signal connection with the controller. When the surface temperature of the test battery reaches 100°C during the test, which exceeds the set temperature, the temperature sensor will feed back the signal to the controller. The controller will control the electric hinge and cause the test bench to hang freely. The test battery will fall into the water bath. The water in the water bath will submerge the test battery to prevent the test battery from catching fire or exploding.

[0033] The present invention reduces the risk of explosion and fire during lithium battery testing and has high safety.

[0034] As for the devices and methods of use disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the methods.

[0035] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test bench for preventing lithium batteries from catching fire during testing, characterized in that: include: A water bath (1), wherein cover plates (2) are fixed at both ends of the top of the water bath (1), and a notch is provided between the top of the water bath (1) and the cover plates (2); A test bench plate (3), wherein the test bench plate (3) has two groups and is respectively hinged to the cover plate (2) on the corresponding side, the two groups of the test bench plates (3) can be opened and closed to cover the gap, and an electric hinge is connected between the test bench plate and the cover plate (2); A test battery (4), the test battery (4) being placed on the test bench (3), and the test battery (4) being connected to a temperature sensor (6); A controller (7), wherein the controller (7) is fixed on the cover plate (2) and is respectively connected to the temperature sensor (6) and the electric hinge via electrical signals.

2. A test bench for preventing lithium batteries from catching fire during testing according to claim 1, characterized in that: There is a gap between the two ends of the test bench plate (3) and the inner wall of the water bath (1), and there is a gap between the adjacent side ends of the two groups of test bench plates (3), and the test battery (4) is placed on the two groups of test bench plates (3).

3. A test bench for preventing lithium batteries from catching fire during testing according to claim 1, characterized in that: A heat transfer metal sheet (5) is fixedly connected to the outer side wall of the test battery (4), and the temperature sensor (6) is fixed on the heat transfer metal sheet (5).

4. A test method for preventing a lithium battery from catching fire during a test, using a test bench as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1: Assemble the test bench and install the test bench plate on the cover plate. In an idle state, the test bench plate is vertically downward. In an experimental state, the test bench plate is controlled by an electric hinge to be in a horizontal state and covers the gap on the top of the water bath. Step 2: Prepare the experiment, inject clean water into the water bath through the gap, and make sure that the water level is higher than the test battery. The electric hinge drives the two sets of test platforms to a horizontal state, and place the test battery in the middle of the two sets of test platforms. Step 3: Connect the detection device for detection, install the temperature sensor on the outer wall of the test battery, and establish a signal connection with the controller. When the temperature of the test battery reaches the set temperature during the test, the temperature sensor feeds back the signal to the controller. The controller controls the electric hinge and causes the test bench to hang freely. The test battery falls into the water bath to avoid fire and explosion of the test battery.

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