Tank cell thermal runaway test device

Abstract

The utility model discloses a test device for thermal runaway of a tank cell, which relates to the technical field of battery test and comprises a pressure tank used for providing a sealed environment; the test mechanism is used for puncturing the test battery to release gas and is arranged in the inner cavity of the pressure tank; the testing mechanism comprises a clamping mechanism, a clamping mechanism, a clamping mechanism, a clamping mechanism and a clamping mechanism, wherein the clamping mechanism is used for clamping and fixing a tested battery; the movable pricking needle is used for pricking the outer wall of the test battery; and the mobile driving assembly is used for driving the stabbing needle to be inserted into or pulled out of the test battery. According to the utility model, a sealed environment is provided for the test mechanism through the pressure tank, then the test battery is positioned and fixed through the clamping mechanism on the test mechanism, and finally the pricking needle is driven by the movable driving assembly to prick into the positioned test battery and then is drawn out, so that the thermal runaway test of the lithium battery can be easily carried out; complex operation steps are not needed, and the testing efficiency and convenience are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a testing device for thermal runaway of a tank battery core. Background Art

[0002] At present, lithium-ion batteries have been used in our lives, especially power batteries, and people pay more and more attention to their safety performance. During the use of electric vehicles, if a high-energy accident such as a collision occurs, it may cause serious deformation of the lithium-ion battery, resulting in serious safety problems such as internal short circuits in the lithium-ion battery.

[0003] In the prior art, when a battery cell thermally runs away, a large amount of gas will be generated, including flammable gas, toxic gas and oxygen, etc. By analyzing these gases, the internal state of the battery can be monitored in real time, abnormal conditions can be discovered in advance and measures can be taken to prevent the occurrence of battery thermal runaway accidents. In order to trigger battery runaway by adding other methods and collect and analyze the generated gases, a test device for thermal runaway of a can battery cell is now proposed. Utility Model Content

[0004] The utility model aims to provide a test device for thermal runaway of a can battery cell to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a test device for thermal runaway of a can battery cell, comprising:

[0006] A pressure tank, wherein the pressure tank is used to provide a sealed environment;

[0007] A test mechanism for puncturing a test battery to release gas, the test mechanism being installed in the inner cavity of the pressure tank;

[0008] The testing institutions include:

[0009] A clamping mechanism, which is used to clamp and fix the test battery;

[0010] A movable puncture needle, the puncture needle is used to puncture the outer wall of the test battery;

[0011] A mobile driving component is used to drive the puncture needle to puncture into or pull out of the test battery.

[0012] Preferably, a bottom plate is provided between the clamping mechanism and the mobile driving assembly, the bottom plate is used for fixed connection between the clamping mechanism and the mobile driving assembly, and the bottom plate is provided with a through hole for transmission of the puncture needles.

[0013] Preferably, the clamping mechanism comprises a battery fixing plate 1 and a battery fixing plate 2, a bolt is provided on the side of the battery fixing plate 2 facing away from the battery fixing plate 1, one end of the bolt passes through the side wall of the battery fixing plate 2 and is fixedly connected to the outer wall of the battery fixing plate 1, a spring is sleeved on the outer wall of the bolt and located between the end of the bolt and the battery fixing plate 2, and the battery fixing plate 2 and the battery fixing plate 1 are used for clamping the test battery.

[0014] Preferably, the bottom of the battery fixing plate 1 is fixedly connected to the top of the base plate, a support plate is fixedly provided on the side of the battery fixing plate 1 facing away from the battery fixing plate 2, and the bottom of the support plate is fixedly connected to the top of the base plate.

[0015] Preferably, the mobile driving assembly comprises a fixed block, the fixed block is fixedly connected to a side of the bottom plate away from the clamping mechanism, an oil cylinder is fixedly connected to the inner side of the fixed block, and the oil cylinder is used to drive the needle to move.

[0016] Preferably, a rotation positioning block is provided between the telescopic end of the oil cylinder and the needle, and the rotation positioning block is made of non-conductive material.

[0017] Technical effects and advantages of the utility model:

[0018] The utility model provides a sealed environment for the test mechanism through a pressure tank, and then positions and fixes the test battery through a clamping mechanism on the test mechanism, and finally drives the piercing needle through a mobile driving component to penetrate into the positioned test battery and then withdraw it, so that the thermal runaway test of the lithium battery can be easily carried out without complicated operating steps, which greatly improves the efficiency and convenience of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front sectional structural schematic diagram of the utility model.

[0020] Figure 2 It is a schematic diagram of the side sectional structure of the utility model.

[0021] In the figure: 100, pressure tank; 101, bottom plate; 102, oil cylinder; 103, fixing block; 104, needle; 105, rotation positioning block; 106, battery fixing plate 1; 107, battery fixing plate 2; 108, bolt; 109, spring; 110, support plate; 200, test battery. DETAILED DESCRIPTION

[0022] 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 in 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.

[0023] The utility model provides Figure 1-2 A test device for thermal runaway of a tank battery cell shown in the figure comprises a pressure tank 100 and a test mechanism for puncturing a test battery 200 to release gas. The pressure tank 100 is used to provide a sealed environment. The test mechanism is installed in the inner cavity of the pressure tank 100. In some embodiments, the pressure tank 100 is composed of a tank body, a sealing door, and a pipe connecting the tank body. The sealing door is used to conveniently close the port of the tank body to facilitate the loading and unloading of materials by the test mechanism. At the same time, the pipe can facilitate the transmission of the gas generated inside the tank body, facilitating the transmission of gas while ensuring the sealed environment inside the tank body. In addition, several The test mechanism comprises: a clamping mechanism, which is used to clamp and fix the test battery 200; a movable needle 104, which is used to pierce the outer wall of the test battery 200; a movable driving component, which is used to drive the needle 104 to pierce or pull out the test battery 200, and the test battery 200 is clamped and positioned by the clamping mechanism, and then the test mechanism and the clamped and positioned test battery 200 are placed together. The pressure tank 100 is sealed, and the mobile driving assembly is controlled from the outside to drive the puncture needle 104 to puncture the positioned test battery 200 and then withdraw, so that the test battery 200 is tested for thermal runaway. After the test battery 200 is punctured, the gas generated is transmitted through a pipeline to an external gas collection and analysis mechanism for gas composition analysis; in addition, the present embodiment can also adopt the real-time data acquisition technology in the prior art, which can instantly record the values ​​of key parameters such as temperature, voltage, pressure, etc., which makes the test process more accurate and controllable, and researchers can monitor the status of the lithium battery at any time and adjust the experimental conditions in time to meet different research needs; the puncture stop trigger is performed according to the collected key parameters (it is allowed to use the collected key parameters, such as temperature, voltage, pressure, etc., as the puncture stop trigger condition); this intelligent triggering method makes the test process more flexible and intelligent, and the test can be stopped in time according to the changes in real-time data to avoid potential safety risks; thereby providing a set of complete solutions for lithium battery thermal runaway testing by providing convenient triggering methods, eliminating gas interference, real-time data acquisition, and intelligent puncture stop triggering conditions, which effectively improves the accuracy and reliability of the test.

[0024] A base plate 101 is provided between the clamping mechanism and the mobile driving assembly. The base plate 101 is used for fixed connection between the clamping mechanism and the mobile driving assembly. The base plate 101 is provided with a through hole for transmission of the puncture needle 104. The base plate 101 is used to connect the clamping mechanism and the testing mechanism, which can facilitate the loading and unloading of materials in the pressure tank 100 as a whole, thereby improving the convenience of use.

[0025] In a preferred embodiment, the clamping mechanism includes a battery fixing plate 106 and a battery fixing plate 2 107. A bolt 108 is provided on the side of the battery fixing plate 107 facing away from the battery fixing plate 106. One end of the bolt 108 passes through the side wall of the battery fixing plate 107 and is fixedly connected to the outer wall of the battery fixing plate 106. A spring 109 is sleeved on the outer wall of the bolt 108 and located between the end of the bolt 108 and the battery fixing plate 2 107. The battery fixing plate 2 107 and the battery fixing plate 1 106 are used for clamping the test battery 200. Preferably, the bottom of the battery fixing plate 106 is fixedly connected to the top of the bottom plate 101. A support plate 110 is fixedly provided on the side of the battery fixing plate 106 facing away from the battery fixing plate 2 107. The bottom of the support plate 110 is fixedly connected to the top of the bottom plate 101. In this embodiment, the test personnel manually pull the battery fixing plate 2 107 outward to squeeze the spring 109 to deform. The space between the battery fixing plate 106 and the battery fixing plate 2 107 is increased to facilitate the placement of the test battery 200, and then the tension on the battery fixing plate 2 107 is removed, and the elastic reaction force of the spring 109 is used to drive the battery fixing plate 2 107 to move toward the battery fixing plate 1 106, so as to achieve the clamping and positioning of the test battery 200, wherein the setting of the support plate 110 can enhance the overall firmness of the clamping mechanism, and at the same time, the support plate 110 can be used to connect the clamping mechanism and the bottom plate 101, so that the clamping mechanism is convenient for clamping and positioning the test battery 200, and then the clamping mechanism is fixed to the bottom plate 101 through the support plate 110, and the bolt 108 and the battery fixing plate 1 106 are threadedly connected and fixed, so the clamping force between the battery fixing plate 1 106 and the battery fixing plate 2 107 can be further increased by screwing the bolt 108, thereby improving the firmness of the positioning of the test battery 200;

[0026] Furthermore, the mobile drive assembly includes a fixed block 103, which is fixedly connected to the side of the bottom plate 101 away from the clamping mechanism, and a cylinder 102 is fixedly connected to the inner side of the fixed block 103, and the cylinder 102 is used to drive the needle 104 to move; a rotation positioning block 105 is arranged between the telescopic end of the cylinder 102 and the needle 104, and the rotation positioning block 105 is made of non-conductive material. The cylinder 102 realizes movement through an oil inlet pipe and an oil return pipe, and the oil inlet pipe and the oil return pipe are respectively fixedly connected to the pressure tank 100 to ensure sealing. The external oil pressure mechanism for controlling the movement of the cylinder 102 includes an electric cabinet and a control panel. By operating the control panel, the cylinder 102 is driven forward or backward. The control panel is changed by PLC, and can freely switch the pressure or stroke as the cut-off condition. In addition, the oil pressure drive mode of the cylinder 102 can avoid generating additional gas, thereby avoiding the interference of additional gas affecting the accuracy of the test results.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A test device for thermal runaway of a can battery cell, characterized in that: include: A pressure tank (100), wherein the pressure tank (100) is used to provide a sealed environment; A test mechanism for puncturing a test battery (200) to release gas, the test mechanism being installed in the inner cavity of the pressure tank (100); The testing institutions include: A clamping mechanism, the clamping mechanism being used for clamping and fixing the test battery (200); A movable puncture needle (104), wherein the puncture needle (104) is used to puncture the outer wall of the test battery (200); A moving driving component is used to drive the puncture needle (104) to puncture into or extract from the test battery (200).

2. A test device for thermal runaway of a can battery cell according to claim 1, characterized in that: A bottom plate (101) is provided between the clamping mechanism and the mobile driving assembly. The bottom plate (101) is used for fixed connection between the clamping mechanism and the mobile driving assembly. The bottom plate (101) is provided with a through hole for transmission of the puncture needle (104).

3. A test device for thermal runaway of a can battery cell according to claim 2, characterized in that: The clamping mechanism comprises a battery fixing plate 1 (106) and a battery fixing plate 2 (107); a bolt (108) is provided on a side of the battery fixing plate 2 (107) away from the battery fixing plate 1 (106); one end of the bolt (108) passes through a side wall of the battery fixing plate 2 (107) and is fixedly connected to an outer wall of the battery fixing plate 1 (106); a spring (109) is sleeved on the outer wall of the bolt (108) and located between the end of the bolt (108) and the battery fixing plate 2 (107); the battery fixing plate 2 (107) and the battery fixing plate 1 (106) are used for clamping the test battery (200).

4. A test device for thermal runaway of a can battery cell according to claim 3, characterized in that: The bottom of the first battery fixing plate (106) is fixedly connected to the top of the bottom plate (101); a support plate (110) is fixedly provided on the side of the first battery fixing plate (106) facing away from the second battery fixing plate (107); and the bottom of the support plate (110) is fixedly connected to the top of the bottom plate (101).

5. A test device for thermal runaway of a can battery cell according to claim 2, characterized in that: The mobile drive assembly comprises a fixed block (103), the fixed block (103) being fixedly connected to a side of the bottom plate (101) away from the clamping mechanism, and an oil cylinder (102) being fixedly connected to the inner side of the fixed block (103), the oil cylinder (102) being used to drive the needle (104) to move.

6. A test device for thermal runaway of a can battery cell according to claim 5, characterized in that: A rotational positioning block (105) is provided between the telescopic end of the oil cylinder (102) and the needle (104), and the rotational positioning block (105) is made of a non-conductive material.

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