New energy battery protection device
By setting up protective tubes and side tubes in the battery box, and using solenoid valves to automatically release refrigerant and pressure valves to relieve pressure, the problem of thermal runaway in lithium-ion batteries is solved, and the effect of effectively reducing the battery pack temperature and extending the escape time is achieved.
Patent Information
- Application Number
- CN202421119184.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-22
AI Technical Summary
Lithium-ion batteries may get out of control in abnormal situations, resulting in fires or even explosions, and the existing protective devices are insufficient in the internal protective structure of the battery.
A new energy battery protection device is designed, including a protective tube and side tube in the battery box. A solenoid valve is installed on the protective tube, which is connected to the refrigerant storage tank. When the temperature of the battery pack suddenly increases, the refrigerant will be automatically released. To reduce the temperature and relieve pressure through the pressure valve to relieve heat energy.
By instantly releasing refrigerant and pressure relief, it can effectively reduce the temperature of the battery pack, delay heat diffusion, increase escape time, and reduce the risk of fire and explosion.
Smart Images
Figure CN222530536U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of battery protection, and in particular to a new energy battery protection device. Background Art
[0002] With the continuous development of new energy technologies, especially the widespread application of lithium-ion batteries in electric vehicles, energy storage systems and other fields, battery safety issues have become increasingly prominent. Due to abnormal conditions such as physical damage to lithium batteries, thermal runaway may occur, leading to fire or even explosion.
[0003] Most existing protective devices use internal monitoring and segmentation, and external reinforcement structures to protect the battery. In the case of external reinforcement structures, the existing reinforcement methods mostly use reinforced shell structures to prevent internal batteries from being damaged. The protective structures inside the battery are few and simple. Utility Model Content
[0004] The utility model is based on the above technical problems and proposes a new energy battery protection device.
[0005] A new energy battery protection device comprises: a battery box, wherein the lower part of the battery box is a bottom plate, and the upper part thereof is an upper cover, wherein the internal space of the battery box is divided into independent battery pack installation slots by a plurality of partitions, and a protection tube is embedded in the bottom plate, and a solenoid valve is provided on the protection tube in each of the battery pack installation slots, and one end of the protection tube extends out of the battery box and is connected to a refrigerant storage tank; side tubes are connected to both sides of the protection tube, and the solenoid valve is also provided on the side tubes, and a pressure valve is provided on the bottom plate in each of the battery pack installation slots.
[0006] Preferably, a plurality of solenoid valves are provided on the protection tube located in a single battery pack installation slot.
[0007] Preferably, the protective tube is a thermal insulation tube.
[0008] Preferably, liquid nitrogen is stored in the refrigerant storage tank, and the refrigerant storage tank is detachably connected to the protection tube.
[0009] Preferably, the upper cover is also provided with a protection tube and a side tube, and the protection tubes and the side tubes of the upper and lower layers are staggered in the horizontal direction.
[0010] Beneficial effects: The device is equipped with a protective tube in the battery box, which can release refrigerant in a controlled manner. When a single battery pack experiences thermal runaway, the instantly released refrigerant can lower the temperature of the battery pack, delay the diffusion of heat in the battery pack, and increase the escape time. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1The structure diagram of the utility model is shown;
[0012] Figure 2 Shows a side structural diagram of the utility model;
[0013] Figure 3 Shows Figure 3 Schematic diagram of the AA structure. DETAILED DESCRIPTION
[0014] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0015] like Figure 1~Figure 3 A new energy battery protection device shown in the figure comprises: a battery box 1, the lower part of the battery box 1 is a bottom plate 2, and the upper part thereof is an upper cover 3. The internal space of the battery box 1 is divided into independent battery pack installation slots 7 by a plurality of partitions 6. The battery pack is fixedly installed in the battery pack installation slot 7. A protection tube 4 is embedded and installed on the bottom plate 2. The protection tube 4 is a heat-insulating tube. A plurality of solenoid valves 5 are arranged on the protection tube 4 in each battery pack installation slot 7. One end of the protection tube 4 extends out of the battery box 1 and is connected to a refrigerant storage tank. The upper cover 3 is also provided with a protection tube 4 and a side tube 8. The upper and lower layers of the protection tubes 4 and The side pipes 8 are staggered in the horizontal direction; when it is detected that the temperature of the battery pack in a certain battery pack installation slot 7 suddenly increases, the system automatically controls the solenoid valve 5 in the battery pack installation slot 7 to open and release the refrigerant. The refrigerant can be liquefied nitrogen. Under normal circumstances, the refrigerant storage tank is closed, and there will be no refrigerant in the protective tube 4. When the liquefied nitrogen vaporizes and absorbs heat, the pressure in the battery pack installation slot 7 will increase. At this time, the pressure valve 9 is opened to release the pressure, while guiding the battery pack heat to be released slowly, thereby slowing down the explosion time of the entire battery pack and providing personnel with sufficient reaction time.
[0016] In order to ensure uniform release of the refrigerant, identical side pipes 8 are arranged on both sides of the protection pipe 4 , and a solenoid valve 5 is also arranged on the side pipe 8 .
[0017] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A new energy battery protection device, characterized in that: include: A battery box, wherein the lower portion of the battery box is a bottom plate, and the upper portion thereof is an upper cover, wherein the internal space of the battery box is divided into independent battery pack installation slots by a plurality of partitions, and a protective tube is embedded in the bottom plate, and an electromagnetic valve is provided on the protective tube in each of the battery pack installation slots, and one end of the protective tube extends out of the battery box and is connected to a refrigerant storage tank; side tubes are connected to both sides of the protective tube, and the electromagnetic valve is also provided on the side tubes, and a pressure valve is provided on the bottom plate in each of the battery pack installation slots.
2. The new energy battery protection device according to claim 1, characterized in that: A plurality of solenoid valves are provided on the protection tube located in a single battery pack installation slot.
3. The new energy battery protection device according to claim 1, characterized in that: The protection tube is a heat-insulating tube.
4. The new energy battery protection device according to claim 1, characterized in that: The refrigerant storage tank stores liquid nitrogen, and the refrigerant storage tank is detachably connected to the protection tube.
5. The new energy battery protection device according to claim 1, characterized in that: The upper cover is also provided with a protection tube and a side tube, and the protection tubes and the side tubes of the upper and lower layers are staggered in the horizontal direction.