Rapid cooling tool for overcharge detection of square-shell battery cell

Abstract

The utility model provides a square shell cell overcharge detection rapid cooling tool, which comprises a box body, a top cover arranged at the top of the box body, first heat insulation cotton arranged in the box body, a first detection groove arranged on the first heat insulation cotton, a first connecting plate arranged in the first detection groove, and a second connecting plate arranged in the second detection groove, a first top pressure sensor is arranged at the top end of the first detection groove, a first side pressure sensor is arranged in the first detection groove, a first bottom pressure sensor is arranged on the first connecting plate, and a first camera is arranged above the first detection groove; the top cover is arranged to be hollow, two inclined placing tables with smooth surfaces are placed, and the top cover is filled with a chemical fire extinguishing agent or a chemical cooling agent, so that when a fire breaks out, a wax block can be quickly melted, a cooling material in the top cover flows into a battery cell placing groove to isolate oxygen, then quick cooling is performed, and the safety of a user can be effectively protected; and meanwhile, the battery cell is not on fire, and effective overcharge failure analysis can be made.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and more specifically, to a tooling for rapid cooling during overcharge detection of prismatic battery cells. Background Technology

[0002] In electric vehicles, energy storage systems, and other electronic devices, batteries serve as the core energy storage unit, and their safety and reliability are crucial for the normal operation of the entire system. Battery failure warning technology, as one of the key technologies for ensuring battery safety, has received widespread attention and research in recent years. However, despite the existence of various battery failure warning technologies, some significant shortcomings and deficiencies still exist.

[0003] The following problems exist in the existing technology:

[0004] When existing battery cells are subjected to overcharge simulation tests, the cells generate a lot of heat. Overcharged cells are prone to catching fire. Current technologies cannot quickly cool down the cells, nor can they guarantee user safety. Furthermore, once a cell catches fire, it is usually left to burn completely, making it impossible to conduct effective overcharge failure analysis.

[0005] Therefore, this application provides a rapid cooling fixture for overcharge detection of prismatic battery cells to solve the above problems. Utility Model Content

[0006] The purpose and effect of this utility model are achieved by the following specific technical means: A rapid cooling fixture for overcharge detection of square-shell battery cells, including a housing, and further comprising:

[0007] The top cover is located at the top of the box body. The top cover has inclined platforms at both ends inside, and a placement groove is located in the middle of the top cover. A first pressure sensor is installed in the placement groove, and a second pressure sensor is installed on one side of the first pressure sensor.

[0008] More preferably, the top cover has an exhaust hole at its top, the side of the housing has a first interface, and a second interface is provided on one side of the first interface.

[0009] More preferably, the front of the enclosure is provided with a control panel, which includes an alarm light, an on / off switch, and a power off switch.

[0010] More preferably, the box body is provided with a first heat insulation cotton inside, and a second heat insulation cotton is provided on one side of the first heat insulation cotton.

[0011] More preferably, the first heat insulation cotton is provided with a first detection groove, and the second heat insulation cotton is provided with a second detection groove.

[0012] More preferably, the inclination angle of the ramp is between 3° and 10°, and the surface of the ramp is a smooth surface.

[0013] More preferably, the first pressure sensor is located above the first detection slot, and the second pressure sensor is located above the second detection slot.

[0014] More preferably, both the first pressure sensor and the second pressure sensor are fixed to the top cover using thermally conductive structural adhesive.

[0015] The beneficial effects of this utility model are:

[0016] By designing the top cover as hollow, two inclined, smooth-surfaced placement platforms are placed inside. The top cover is filled with chemical fire extinguishing agents or chemical cooling agents. When a fire occurs, the wax block will melt rapidly, allowing the cooling material inside the top cover to flow into the cell placement slot to isolate oxygen and then rapidly cool down. This effectively protects the user's safety, while preventing the cell from catching fire, and allows for effective overcharge failure analysis. Attached Figure Description

[0017] Figure 1 Main view of a rapid cooling fixture for overcharge detection of square-shell battery cells;

[0018] Figure 2 for Figure 1 Schematic diagram of the internal structure of the middle box;

[0019] Figure 3 for Figure 1 Schematic diagram of the internal structure of the top cover.

[0020] In the diagram: 1. Box body; 2. Top cover; 3. Vent; 4. First interface; 5. Second interface; 6. Control panel; 7. Alarm light; 8. Power switch; 9. Power off switch; 10. First insulation cotton; 11. Second insulation cotton; 12. First detection slot; 13. Second detection slot; 14. Placement slot; 15. Inclined platform; 16. First pressure sensor; 17. Second pressure sensor. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, detailed descriptions of specific embodiments are provided. The following embodiments are merely examples of implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the scope of this utility model are within the patent protection scope of this utility model.

[0022] A rapid cooling fixture for overcharge detection of square-shell battery cells includes a housing 1. After the housing 1 and the top cover 2 are connected, the inside of the housing 1 is sealed. The edges of the housing 1 can be sealed with glue to prevent air from entering the inside of the housing 1 and to prevent the battery cells from catching fire.

[0023] The top cover 2 has inclined platforms 15 at both ends inside, and a placement groove 14 is provided in the middle of the top cover 2. A first pressure sensor 16 is provided in the placement groove 14, and a second pressure sensor 17 is provided on one side of the first pressure sensor 16. Both the first pressure sensor 16 and the second pressure sensor 17 can sense the pressure inside the box 1. There is a gas generation stage before the battery cell burns. The gas generation will increase the pressure inside the box 1, which can trigger alarms and other alarms through the pressure sensors, effectively improving the user experience.

[0024] The top cover 2 is hollow, and two inclined, smooth-surfaced placement platforms are placed inside. The inside of the top cover 2 is filled with chemical fire extinguishing agents or chemical cooling agents. When a fire occurs, the wax block will melt rapidly, allowing the cooling material inside the top cover 2 to flow into the cell placement slot 14 to isolate oxygen and then cool down quickly. This can effectively protect the user's safety, and at the same time, the cell will not catch fire, allowing for effective overcharge failure analysis.

[0025] The top of the top cover 2 is provided with an exhaust hole 3. When the cooling is completed, if the air pressure inside the box 1 is too high, it can be vented through the exhaust hole 3 to release the air, which can prevent the box 1 from exploding due to excessive air pressure. The side of the box 1 is provided with a first interface 4, and a second interface 5 is provided on one side of the first interface 4. The first interface 4 and the second interface 5 are connected to an external power source, and the internal components of the box 1 are electrically driven through an external battery cell.

[0026] The front of the enclosure 11 is equipped with a control panel 6. Users can operate the enclosure 1 by using the control panel 6. The control panel 6 is equipped with an alarm 7, an on / off switch 8, and a power off switch 9. When the internal air pressure of the enclosure 11 is too high, the alarm 7 will light up to provide a warning. Users can turn the enclosure on or off by using the on / off switch 8 and the power off switch 9 on the control panel 6.

[0027] The box 1 is equipped with a first heat insulation cotton 10 inside, and a second heat insulation cotton 11 is provided on one side of the first heat insulation cotton 10. The heat insulation cotton can isolate the external heat from affecting the battery cell being tested, making the test data more accurate, and at the same time preventing fire and improving safety.

[0028] The first heat insulation cotton 10 is provided with a first detection groove 12, and the second heat insulation cotton 11 is provided with a second detection groove 13. The battery cell to be tested is inserted into the first detection groove 12 and the second detection groove 13. Conventional battery cells or overcharged battery cells can be placed in the first detection groove 12 and the second detection groove 13 to form an experimental group and a control group, which is highly practical.

[0029] The inclined platform 15 has an inclination angle between 3° and 10°, preferably 5°, which allows the cooling material inside the top cover 2 to flow into the box 1 by inertia, and the flow rate is uniform, which can effectively cool the battery cells inside the box 1. The surface of the inclined platform 15 is a smooth surface, which facilitates the flow of cooling material.

[0030] The first pressure sensor 16 is located above the first detection slot 12, and the second pressure sensor 17 is located above the second detection slot 13. This allows for more accurate detection of the air pressure in the first detection slot 12 and the second detection slot 13, and can quickly alert the user to ensure user safety.

[0031] The first pressure sensor 16 and the second pressure sensor 17 are both fixed to the top cover 2 by thermally conductive structural adhesive. Before the battery cell is overcharged and burns, there will be a gas generation stage, which will cause the inside of the box 1 to heat up and melt the thermally conductive structural adhesive. The air pressure can be used to push the first pressure sensor 16 and the second pressure sensor 17 into the inside of the top cover 2, so that the cooling material flows into the first detection groove 12 and the second detection groove 13 for rapid cooling.

Claims

1. A rapid cooling fixture for overcharge detection of square-shell battery cells, comprising a housing, characterized in that, Also includes: The top cover is located at the top of the box body. The top cover is filled with chemical fire extinguishing agent or chemical cooling agent. The top cover has inclined platforms at both ends. The top cover has a placement groove in the middle. A first pressure sensor is installed in the placement groove. A second pressure sensor is installed on one side of the first pressure sensor.

2. The rapid cooling fixture for overcharge detection of square-shell battery cells according to claim 1, characterized in that: The top of the cover is provided with an exhaust hole, the side of the box is provided with a first interface, and a second interface is provided on one side of the first interface.

3. The rapid cooling fixture for overcharge detection of square-shell battery cells according to claim 1, characterized in that: The front of the enclosure is equipped with a control panel, which includes an alarm light, an on / off switch, and a power off switch.

4. The rapid cooling fixture for overcharge detection of square-shell battery cells according to claim 1, characterized in that: The box is equipped with a first heat insulation cotton inside, and a second heat insulation cotton is provided on one side of the first heat insulation cotton.

5. The rapid cooling fixture for overcharge detection of square-shell battery cells according to claim 4, characterized in that: The first heat insulation cotton is provided with a first detection groove, and the second heat insulation cotton is provided with a second detection groove.

6. The rapid cooling fixture for overcharge detection of square-shell battery cells according to claim 1, characterized in that: The inclined platform has an inclination angle between 3° and 10°, and its surface is smooth.

7. The rapid cooling fixture for overcharge detection of square-shell battery cells according to claim 5, characterized in that: The first pressure sensor is located above the first detection slot, and the second pressure sensor is located above the second detection slot.

8. The rapid cooling fixture for overcharge detection of square-shell battery cells according to claim 1, characterized in that: Both the first pressure sensor and the second pressure sensor are fixed to the top cover using thermally conductive structural adhesive.

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