New energy battery thermal failure detection alarm device based on pressure sensor

Abstract

The utility model discloses a new energy battery thermal failure detection alarm device based on pressure intensity sensors, comprising a pressure intensity monitoring module used for monitoring internal pressure values of a plurality of battery packs, and the pressure intensity monitoring module comprises pressure intensity sensors in one-to-one correspondence with the plurality of battery packs. And the pressure intensity sensor is arranged in the battery pack corresponding to the pressure intensity sensor. The device is reasonable in overall design, simple in structure and convenient to operate, thermal failure of the battery can be found in time by effectively combining the pressure monitoring module and the signal processor, a fire extinguishing device can be started at the initial stage of a fire disaster, the loss and risk of the fire disaster are reduced, and great convenience is brought to detection and alarm work of the thermal failure of the battery.

Description

Technical Field

[0001] This utility model relates to the field of thermal failure detection technology for new energy batteries, and in particular to a thermal failure detection alarm device for new energy batteries based on a pressure sensor. Background Technology

[0002] If thermal failure of new energy storage batteries is not effectively controlled, it can spread to battery packs, clusters, storage units, and even the entire energy storage power station, causing huge losses. Unlike the instantaneous thermal failure of power batteries, thermal failure of energy storage batteries takes several minutes to more than ten minutes from cell heating to violent heat release. Moreover, if the temperature is kept below the thermal failure transition point, such as 140°C, thermal failure will not occur. Therefore, early detection and suppression of battery cell temperature rise are crucial. Thermal failure of new energy batteries will produce changes in parameters such as sound, light, electricity, gas, and pressure, which can be used as fire detection methods.

[0003] Commonly used detection and alarm devices utilize temperature and smoke, but the enclosed space of a battery pack makes the conduction of temperature and smoke very slow, resulting in a slow alarm response. Voiceprint recognition technology for battery cell safety valve bursting requires a large number of battery cell thermal failure samples for training, and its high maintenance costs make it difficult to commercialize. Furthermore, optical signals are difficult to transmit and receive within the enclosed battery pack.

[0004] When thermal failure occurs, the bursting of the cell safety valve will generate a violent pressure surge within the battery pack. Since pressure propagation is also a wave transmission with extremely high speed, the pressure surge can be used as an alarm indicator for thermal failure. Moreover, pressure detectors have the advantages of low cost, convenient maintenance, and repeated testing, making them suitable not only for thermal failure detection of new energy storage batteries but also for detection of power batteries. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model aims to provide a new energy battery thermal failure detection and alarm device based on a pressure sensor. This detection and alarm device has a reasonable overall design, simple structure, and convenient operation. By effectively combining a pressure monitoring module and a signal processor, it can promptly detect battery thermal failure and activate fire extinguishing devices in the early stages of a fire, reducing fire losses and risks, and bringing great convenience to the detection and alarm work of battery thermal failure.

[0006] To solve the above technical problems, this utility model adopts the following technical solution:

[0007] A new energy battery thermal failure detection and alarm device based on a pressure sensor, characterized in that it includes:

[0008] A pressure monitoring module for real-time monitoring of the internal pressure value of a battery pack, the pressure monitoring module including a pressure sensor corresponding to a plurality of battery packs, the pressure sensor being installed inside the corresponding battery pack;

[0009] A signal processor for filtering the received pressure signal and comparing it with a set threshold, the signal processor being communicatively connected to the pressure sensor;

[0010] A fire alarm controller for receiving alarm signals from a signal processor, the fire alarm controller being communicatively connected to the signal processor;

[0011] When the pressure signal received by the signal processor exceeds the threshold, it sends an alarm signal for the pressure address to the fire alarm controller. After receiving the address code, the fire alarm controller activates the fire extinguishing device to extinguish the fire in the corresponding battery pack.

[0012] In a preferred embodiment of this invention, the signal processor compares the absolute value of pressure, with a threshold of 0.105 MPa.

[0013] In a preferred embodiment of this invention, the signal processor compares the pressure boost rate, with a threshold of 50 hP / s.

[0014] In a preferred embodiment of this invention, the pressure sensor is a MEMS sensor.

[0015] Compared with existing technologies, this utility model has a reasonable overall design, simple structure, and convenient operation. The effective combination of pressure monitoring module and signal processor can detect battery thermal failure in a timely manner and can activate fire extinguishing devices in the early stage of a fire, reducing fire losses and risks, and bringing great convenience to the detection and alarm work of battery thermal failure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the control principle of this utility model.

[0018] Figure 2 This is the control logic diagram of this utility model. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0020] Reference Figure 1 Figure 2 As shown in the figure, a new energy battery thermal failure detection and alarm device based on a pressure sensor according to Embodiment 1 is provided, including a pressure monitoring module 100, a signal processor 200 and a fire alarm controller 300.

[0021] The pressure monitoring module 100 is used to monitor the internal pressure values ​​of multiple battery packs 400. The pressure monitoring module 100 includes a pressure sensor 110 corresponding to each of the multiple battery packs 400. The pressure sensor 110 is installed inside its corresponding battery pack 400.

[0022] The signal processor 200 is used to filter the received pressure signal and compare it with a set threshold. The signal processor 200 is communicatively connected to the pressure sensor 110.

[0023] The fire alarm controller 300 is used to receive alarm signals sent by the signal processor 200, and the fire alarm controller 300 is communicatively connected to the signal processor 200.

[0024] When the pressure signal received by the signal processor 200 exceeds the threshold, it sends an alarm signal for the pressure address to the fire alarm controller 300. After receiving the address code, the fire alarm controller 300 activates the fire extinguishing device to extinguish the fire in the corresponding battery pack.

[0025] The signal processor 200 compares the absolute value of the pressure, with a threshold of 0.105 MPa. When the pressure signal detected by the pressure sensor 110 exceeds 0.105 MPa, it sends an alarm signal with the pressure address to the fire alarm controller. After receiving the address code, the fire alarm controller 300 activates the fire extinguishing device and its corresponding battery pack 400 to extinguish the fire.

[0026] The signal processor 200 compares the pressure rise rate, with a threshold of 50 hP / s. When the pressure rise rate detected by the pressure sensor 110 exceeds 50 hP / s, it sends an alarm signal for that pressure address to the fire alarm controller. After receiving the address code, the fire alarm controller 300 activates the fire extinguishing device and its corresponding battery pack to extinguish the fire.

[0027] The pressure sensor 110 can also send both of the above signals to the signal processor simultaneously. When either signal exceeds the corresponding threshold, it can send an alarm signal for that pressure address to the fire alarm controller. After receiving the address code, the fire alarm controller will activate the corresponding battery pack of the fire extinguishing device to extinguish the fire, which effectively improves the accuracy of detection.

[0028] Another signal processor 200 can correspond to several pressure sensors 110, and a fire alarm controller 300 can correspond to multiple signal processors 200. The specific correspondence structure can be determined according to the actual situation.

[0029] The pressure sensor 110 uses a MEMS detector to reduce its size and facilitate its placement inside the battery pack. The detection range of the pressure sensor can cover from atmospheric pressure to the battery pack safety valve activation value. The pressure sensor needs to be selected with appropriate accuracy.

[0030] The pressure sensor 110 can also be used in conjunction with other types of detectors. When two or more different types of detectors corresponding to a battery pack 400 alarm simultaneously, a fire can be confirmed, and the fire alarm controller will activate the fire extinguishing device.

[0031] In summary, this utility model has a reasonable overall design, simple structure, and convenient operation. The effective combination of pressure monitoring module and signal processor can detect battery thermal failure in a timely manner and can activate fire extinguishing device in the early stage of fire, reducing fire losses and risks, and bringing great convenience to the detection and alarm work of battery thermal failure.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A new energy battery thermal failure detection and alarm device based on a pressure sensor, characterized in that, include: A pressure monitoring module for monitoring the internal pressure values ​​of multiple battery packs, the pressure monitoring module including a pressure sensor corresponding to each of the multiple battery packs, the pressure sensor being disposed inside its corresponding battery pack; A signal processor for filtering the received pressure signal and comparing it with a set threshold, the signal processor being communicatively connected to the pressure sensor; A fire alarm controller for receiving alarm signals from a signal processor, the fire alarm controller being communicatively connected to the signal processor; When the pressure signal received by the signal processor exceeds the threshold, it sends an alarm signal for the pressure address to the fire alarm controller. After receiving the address code, the fire alarm controller activates the fire extinguishing device to extinguish the fire in the corresponding battery pack.

2. The new energy battery thermal failure detection and alarm device based on a pressure sensor as described in claim 1, characterized in that: The signal processor compares the absolute pressure values, with a threshold of 0.105 MPa.

3. The new energy battery thermal failure detection and alarm device based on a pressure sensor as described in claim 1, characterized in that: The signal processor compares the pressure boost rate, with a threshold of 50 hP / s.

4. The new energy battery thermal failure detection and alarm device based on a pressure sensor as described in claim 1, characterized in that: The pressure sensor uses a MEMS detector.

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