Lithium battery fireproof device

Abstract

The utility model discloses a lithium battery fireproof device, and belongs to the technical field of battery fireproof. The fireproof blanket is arranged in the battery box, and the battery module in the battery box is wrapped by the fireproof blanket; a first cooling assembly and a second cooling assembly; the first cooling assembly is connected with the outer wall of the battery box; the second cooling assembly is located between the fireproof blanket and the battery module, and the second cooling assembly is arranged around the battery module; the fireproof blankets are reasonably arranged at different positions in the battery box, so that the battery fire can be effectively prevented from spreading, and the safety of a battery system is improved; according to the battery box, the first cooling assembly and the second cooling assembly are arranged and used in cooperation, it can be ensured that the battery can keep a good heat dissipation effect during normal operation, and therefore the safety of the battery box of the electric vehicle is remarkably improved, and fire disasters and accident risks caused by thermal runaway of the battery are effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery fire prevention technology, specifically a lithium battery fire prevention device. Background Technology

[0002] In recent years, with global attention focused on clean energy and low carbon emissions, electric vehicles have developed rapidly. As a core component of electric vehicles, the battery system directly affects the vehicle's range, safety, and stability. Electric vehicles typically use lithium-ion batteries, which have advantages such as high energy density and high charge / discharge efficiency; however, their thermal runaway problem remains a safety hazard.

[0003] Lithium-ion batteries can experience thermal runaway under conditions such as overcharging, over-discharging, battery damage, or external impact, causing a rapid rise in internal battery temperature and potentially leading to fire or even explosion. Fires caused by thermal runaway are characterized by rapid spread and difficulty in control, especially when multiple battery modules are closely arranged in a battery system. If a fire occurs in one module, it can easily spread to the entire battery pack, seriously threatening people's lives and property.

[0004] Currently, electric vehicle battery systems primarily rely on Battery Management Systems (BMS) to monitor battery status in real time and on thermal management systems for cooling. However, while these systems provide some temperature control during battery operation, they often fail to effectively prevent the spread of flames in the event of thermal runaway or fire, making the fire difficult to control. Furthermore, existing fire prevention measures are mostly focused on the exterior of the battery pack, lacking effective protection for the internal battery modules. Summary of the Invention

[0005] To address the problems of existing technologies, this utility model provides a lithium battery fire prevention device, comprising:

[0006] Battery box;

[0007] A fireproof blanket is placed inside the battery box and wraps the battery modules inside the battery box.

[0008] First cooling component and second cooling component;

[0009] The first cooling component is connected to the outer wall of the battery box;

[0010] The second cooling component is located between the fire blanket and the battery module, and the second cooling component is arranged around the battery module.

[0011] Furthermore, a monitoring panel, an emergency stop button, a power interface, and a controller are provided on the outer wall of the battery box;

[0012] Both the monitoring panel and the emergency stop button are connected to the controller. The emergency stop button is also connected to the battery module. The emergency stop button is used to stop the power supply process of the battery module when the temperature of the battery module exceeds a preset value.

[0013] Furthermore, the battery box is equipped with a pressure sensor, a temperature sensor, a smoke sensor, a voltage sensor, and a current sensor, which are respectively connected to the controller.

[0014] Furthermore, the battery module is formed by arranging and connecting multiple battery cells in parallel, with the fireproof blanket provided between adjacent battery cells and between adjacent battery modules.

[0015] Furthermore, the first cooling component is a cooling fan.

[0016] Furthermore, the second cooling component is a condenser tube.

[0017] The beneficial effects of this utility model are:

[0018] This application effectively prevents the spread of battery fires and improves the safety of the battery system by properly placing fire blankets in different positions inside the battery box. By setting up a first cooling component and a second cooling component to work together, it can ensure that the battery can maintain good heat dissipation during normal operation, thereby significantly improving the safety of the electric vehicle's battery box, effectively reducing the risk of fires and accidents caused by battery thermal runaway, and providing more reliable protection for people's lives and property. Attached Figure Description

[0019] Figure 1 A three-dimensional structural diagram of the lithium battery fireproof device provided by this utility model;

[0020] Figure 2 A schematic diagram of the battery module structure provided by this utility model;

[0021] Figure 3 A schematic diagram of the condenser tube structure provided by this utility model;

[0022] Figure 4 This is a schematic diagram showing the positional relationship between the battery module and the fire blanket provided by this utility model.

[0023] Figure label:

[0024] In the diagram: 1 is the battery box, 2 is the fire blanket, 3 is the battery module, 4 is the monitoring panel, 5 is the emergency stop button, 6 is the power interface, 7 is the battery cell, 8 is the cooling fan, and 9 is the condenser tube. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-4 This utility model provides a lithium battery fire prevention device, comprising:

[0027] Battery box 1;

[0028] Fire blanket 2, which is installed inside the battery box 1 and wraps the battery module 3 inside the battery box 1;

[0029] First cooling component and second cooling component;

[0030] The first cooling component is connected to the outer wall of the battery box 1;

[0031] The second cooling component is located between the fire blanket 2 and the battery module 3, and the second cooling component is arranged around the battery module 3.

[0032] The battery box outer shell is made of high-temperature resistant, corrosion-resistant, and fire-resistant materials. In the event of a fire inside the battery box, the outer shell provides additional protection, preventing the fire from spreading outwards. The outer shell material not only possesses excellent fire resistance but also high structural strength, capable of withstanding damage caused by external impacts or vehicle collisions, ensuring the mechanical integrity of the battery box, and further preventing fire risks to the battery system caused by external factors.

[0033] Fireproof blankets are laid all around the inside of the battery box to provide all-round protection for the battery module. This full-coverage fireproof design can effectively control the fire source inside the battery box in the event of thermal runaway or fire in the battery module, preventing the fire from spreading outward and reducing the impact of battery fire and explosion on the vehicle, thereby ensuring the safety of people and property.

[0034] In some embodiments, a monitoring panel 4, an emergency stop button 5, a power interface 6, and a controller are provided on the outer wall of the battery box 1;

[0035] Both the monitoring panel 4 and the emergency stop button 5 are connected to the controller. The emergency stop button 5 is used to stop the power supply process of the battery module 3 when the temperature of the battery module 3 exceeds the preset value.

[0036] The battery box 1 is equipped with a pressure sensor, a temperature sensor, a smoke sensor, a voltage sensor, and a current sensor, which are respectively connected to the controller.

[0037] The power interface 6 is connected to the vehicle power supply port via an electromagnet.

[0038] The battery box integrates various sensors, including temperature, voltage, and current sensors, to monitor the overall operation of the battery box in real time. By monitoring these parameters, abnormal conditions of the battery pack can be detected in a timely manner, and the data can be displayed through the visual monitoring surface. When the sensors detect abnormalities such as a gradual increase in internal temperature, increased internal pressure, or gas generation, the operator can quickly respond by pressing the emergency stop button to stop the operation of the battery module, thereby ensuring safety. Furthermore, an alarm can be set up to alert the operator when the battery module malfunctions.

[0039] Voltage sensors are typically installed near the battery module to directly acquire real-time battery voltage data. They can also be integrated directly onto the negative terminal of the battery or mounted on a bracket next to the battery module. This design allows the sensor to directly acquire the battery voltage information.

[0040] Current sensors are typically installed between the negative terminals of a battery module because in a circuit, current always flows from the positive terminal, through the load, and back to the negative terminal. By installing a current sensor between the negative terminals, the current output of the entire battery module can be accurately measured. This installation method ensures that the sensor can capture complete current information of the battery module during the charging and discharging process.

[0041] When temperature changes or fire hazards are detected during battery module operation, the visual monitoring panel displays abnormal information, allowing operators to observe the specific anomalies in a timely manner. At this point, the emergency stop button can be used to quickly halt the battery module's operation, preventing further escalation of the fault. During troubleshooting, affected battery modules can be promptly identified and replaced, effectively reducing system downtime, lowering maintenance costs, and ensuring a balance between economy and safety.

[0042] In some embodiments, the battery module 3 is formed by arranging and connecting multiple battery cells 7 in parallel, with the fireproof blanket 2 disposed between adjacent battery cells 7 and between adjacent battery modules 3.

[0043] The battery module comprises multiple modules, each consisting of a combination of multiple battery cells. Each cell is separated by a fire blanket. This design effectively isolates the fire source in the event of thermal runaway or fire in one cell, preventing the fire from spreading to the entire battery module and thus reducing the overall fire risk of the battery pack. Similarly, fire blankets are installed between each layer of battery modules to ensure that even if one module catches fire, the safety of the entire battery module will not be affected. This layered fire protection design provides multiple protective barriers for the battery system, enhancing its safety.

[0044] The battery modules feature a modular design, facilitating quick replacement and maintenance. Each module can be disassembled and tested individually. When a module fails, only the faulty module needs to be replaced, eliminating the need to replace the entire module and significantly reducing maintenance costs. Furthermore, the modular design provides flexibility for system upgrades. Battery system performance or range can be improved by replacing modules without requiring extensive modifications to the entire fireproof enclosure.

[0045] In some embodiments, the first cooling component is a cooling fan 8, and the second cooling component is a condenser pipe 9.

[0046] The condenser tube and cooling fan work together to form an active cooling system. The condenser tube not only ensures good heat dissipation during normal battery system operation but also provides protection in the event of a fire, preventing safety hazards caused by excessively high battery module temperatures. If the battery box experiences an abnormal temperature rise (approximately above 60°C), the cooling fan increases its speed, and the condenser tube increases its cooling efficiency to control the temperature back to normal. In the event of thermal runaway (approximately above 120°C), the cooling fan shuts off to prevent air from being forced into the battery and fueling combustion, while the condenser tube further increases its cooling efficiency to help suppress thermal runaway. Through the synergistic effect of the condenser tube and cooling fan, the operating temperature of the battery module can be effectively controlled, ensuring stable operation of the battery box under various operating conditions.

[0047] The condenser tube is connected to the liquid storage tank, which contains a pump and coolant. When the pump starts, the coolant is discharged from the liquid storage tank and enters from one end of the condenser tube, then flows back to the cooling chamber through the other end of the condenser tube. The cooling chamber is designed with cooling water to cool the coolant.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lithium battery fire prevention device, characterized in that, include: Battery box; A fire blanket is placed inside the battery box and wraps the battery modules inside the battery box. First cooling component and second cooling component; The first cooling component is connected to the outer wall of the battery box; The second cooling component is located between the fire blanket and the battery module, and the second cooling component is arranged around the battery module.

2. The lithium battery fireproof device according to claim 1, characterized in that, The outer wall of the battery box is equipped with a monitoring panel, an emergency stop button, a power interface, and a controller. Both the monitoring panel and the emergency stop button are connected to the controller. The emergency stop button is also connected to the battery module. The emergency stop button is used to stop the power supply process of the battery module when the temperature of the battery module exceeds a preset value.

3. The lithium battery fireproof device according to claim 2, characterized in that, The battery box is equipped with a pressure sensor, a temperature sensor, a smoke sensor, a voltage sensor, and a current sensor, which are respectively connected to the controller.

4. The lithium battery fireproof device according to claim 1, characterized in that, The battery module is formed by arranging and connecting multiple cells in parallel, and the fireproof blanket is provided between adjacent cells and between adjacent battery modules.

5. The lithium battery fireproof device according to claim 1, characterized in that, The first cooling component is a cooling fan.

6. The lithium battery fireproof device according to claim 1, characterized in that, The second cooling component is a condenser tube.

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