High-reliability lithium power battery thermal runaway early warning sensing device

Abstract

The utility model discloses a high-reliability lithium power battery thermal runaway early warning sensing device which comprises an installation locking device, one side of the installation locking device is provided with a sensor (pressure, smog or other sensor combination), and the other side of the installation locking device is provided with a power supply circuit, a communication circuit, a control circuit, an indication circuit and the like. According to the high-reliability early-warning sensing device for thermal runaway of the lithium power battery, the early-warning sensing device can be quickly mounted or dismounted in a threaded fixing manner, the use requirement can be met by slightly changing the structure of the existing lithium power battery, and interference or other adverse effects on a battery cell in the battery or other devices are avoided; and the sensor is powered in a non-lithium power battery pack power supply mode, so that the normal work of the device is not influenced by the abnormality of a lithium battery BMS or a battery cell part, and the related circuit of the original power lithium battery is not interfered.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a high-reliability lithium power battery thermal runaway early warning sensor device. Background Art

[0002] Compared with traditional aqueous secondary batteries, lithium-ion batteries have significant advantages such as the highest mass energy density, long cycle life, low self-discharge rate and environmental friendliness. They have been widely used in electric vehicles, energy storage power stations, aerospace and other fields. However, lithium batteries are flammable and explosive when they are in thermal runaway, and the fire is often uncontrollable and has the phenomenon of re-ignition. The end result is burning out, so thermal runaway warning of lithium batteries is particularly important.

[0003] 1. Currently, the known lithium battery thermal runaway warning devices on the market are generally based on the application of gas, temperature and smoke sensors. These warning devices are sealed and installed in the battery box together with the battery cells. At the same time, there are devices such as BMS to monitor the current, voltage and temperature of the battery cells, including various so-called intelligent algorithms. These cannot change the occurrence of combustion or explosion when the lithium battery is in abnormal condition;

[0004] 2. For power lithium batteries, when working at high current, a strong magnetic field will be generated inside, which may accelerate the aging of electronic components, shorten their lifespan, and cause failure. At the same time, these electronic products are sealed in the battery box. Obviously, when these electronic components fail, it is impossible to unseal the sealed battery box at will, replace the internal devices, and then seal it again. This involves the production process control of the battery box, which cannot be handled simply and arbitrarily. Therefore, when there is a failure in the electronic component, it cannot be repaired or replaced in time. When the power battery has been working for a period of time and abnormalities such as thermal runaway occur, these thermal runaway warning devices cannot realize the warning function. Utility Model Content

[0005] The main purpose of the utility model is to provide a high-reliability lithium power battery thermal runaway warning sensor device, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A high-reliability lithium-powered battery thermal runaway warning sensor device comprises a mounting locking device, one end of which is equipped with a sensor, and the other end of which is equipped with power supply, communication, control and indication circuits.

[0008] Preferably, the early warning sensor device includes an installation locking device. The early warning sensor device can be quickly and conveniently installed or replaced and repaired by screw fixing, without causing interference or other adverse effects on the battery cells or other devices in the battery, and only slight changes to the existing lithium power battery box and other structures can meet the use requirements. At the same time, combined with the typical characteristics of lithium battery thermal runaway: increased air pressure and smoke generation, a pressure sensor, a smoke sensor or other multiple sensors can be installed at one end of the early warning sensor device to realize the battery thermal runaway detection function.

[0009] Preferably, the power supply of the early warning sensor device is selected as a non-lithium power battery pack power supply mode to power the sensor, which will not affect the normal operation of the device due to abnormalities in the lithium battery BMS or battery cells, nor will it interfere with the related circuits of the original power lithium battery.

[0010] Preferably, the installation and locking device of the early warning sensor device includes a clamping threaded column, which is located in the middle area of ​​the early warning sensor device, a sealing ring is installed on one side of the mounting seat, and the outer surface of the installation and locking device is engraved with a rotating pattern or a shape corresponding to the wrench opening.

[0011] When the early warning sensor device needs to be inspected or replaced, the installation locking device can be easily and quickly rotated through the rotating pattern on the mounting base or using a wrench, so that the entire device can be easily rotated and disassembled for inspection and maintenance, which can greatly improve the service life and reliability of the device.

[0012] Preferably, the shapes of the two ends of the early warning sensor device and the corresponding protective covers can vary according to the shapes of actual circuits and devices.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The early warning sensor device can be quickly and conveniently installed or replaced and repaired by means of threaded fixing, without causing interference or other adverse effects on the battery cells or other devices in the battery. A slight modification to the existing lithium power battery structure can meet the requirements of use. At the same time, combined with the typical characteristics of thermal runaway of lithium batteries: increased air pressure and smoke generation, the early warning sensor device is designed to use a pressure sensor, a smoke sensor or a combination of other sensors to realize the battery thermal runaway detection function.

[0015] 2. One end of the warning sensor device inside the battery box is not connected or in contact with the battery pack or other circuits in the battery box. The mounting locking device can be rotated quickly and easily through the rotating pattern on the mounting seat or using a wrench, so that the entire device can be easily rotated and disassembled for inspection and maintenance, which can greatly improve the service life and reliability of the device.

[0016] 3. The power supply of the warning sensor device is not a lithium power battery pack power supply, and the normal operation of the device will not be affected by the abnormality of the lithium battery BMS or the battery cell, nor will it interfere with the related circuits of the original power lithium battery. Compared with the existing thermal runaway warning sensor device, the reliability of actual use is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the high-reliability lithium power battery thermal runaway warning sensor device of the utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of the early warning sensor device of the utility model of the high-reliability lithium power battery thermal runaway early warning sensor device;

[0019] Figure 3 This is a schematic diagram of the overall structure of the communication power supply device of the high-reliability lithium power battery thermal runaway warning sensor device of the utility model;

[0020] Figure 4 The utility model is a schematic diagram of the overall structure of the installation device of the high-reliability lithium power battery thermal runaway warning sensor device.

[0021] In the figure: 1. Mounting seat; 2. Early warning sensor device; 3. Communication power supply device; 4. Mounting device; 5. Sensor No. 1 protective cover; 6. Sensor No. 2 protective cover; 20. Connecting seat No. 1; 21. Pressure sensor; 22. Smoke sensor; 23. Screw hole No. 1; 24. Screw No. 1; 30. Connecting seat No. 2; 31. Connector; 32. Power supply; 33. Connecting block; 34. Signal sensor; 35. Screw No. 2; 40. Clamping threaded column; 41. Sealing ring; 42. Rotating pattern. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figure 1-4 As shown, a high-reliability lithium-powered battery thermal runaway warning sensor device includes a mounting locking device, one end of which is equipped with a sensor, and the other end of which is equipped with power supply, communication, control and indication circuits.

[0026] The early warning sensor device includes an installation locking device. The early warning sensor device can be quickly and conveniently installed or replaced and repaired by screw fixing, without causing interference or other adverse effects on the battery cells or other devices in the battery. A slight modification to the structure of the existing lithium power battery box can meet the use requirements. At the same time, combined with the typical characteristics of lithium battery thermal runaway: increased air pressure and smoke generation, a pressure sensor, a smoke sensor or other multiple sensors can be installed at one end of the early warning sensor device to realize the battery thermal runaway detection function.

[0027] The power supply of the early warning sensor device is selected as a non-lithium power battery pack power supply mode to power the sensor, which will not affect the normal operation of the device due to abnormalities in the lithium battery BMS or battery cells, nor will it interfere with the related circuits of the original power lithium battery.

[0028] The installation and locking device of the early warning sensor device includes a clamping threaded column, which is located in the middle area of ​​the early warning sensor device. A sealing ring is installed at the left end of the mounting seat, and the outer surface of the installation and locking device is engraved with a rotating pattern or a shape corresponding to the wrench opening.

[0029] When the early warning sensor device needs to be inspected or replaced, the installation locking device can be easily and quickly rotated through the rotating pattern on the mounting base or using a wrench, so that the entire device can be easily rotated and disassembled for inspection and maintenance, which can greatly improve the service life and reliability of the device.

[0030] The shapes of the two ends of the early warning sensor device and the corresponding protective covers may vary according to the shapes of actual circuits and devices.

[0031] It should be noted that the utility model is a high-reliability lithium-powered battery thermal runaway warning sensor device. The No. 1 sensor shield 5 is installed inside the battery box through a clamping threaded column 40 and does not contact the battery cell group inside it, and the mounting base 1 and the No. 2 sensor shield 6 are installed on the outside of the battery box through a clamping threaded column 40. When the sensor inside is abnormal, the mounting base 1 can be easily and quickly rotated through the rotating pattern 42 on the mounting base 1, so that the entire device can be conveniently rotated and disassembled for inspection and maintenance, which can greatly improve the service life and reliability of the device, and realize the quick and convenient installation or replacement and maintenance operation of the warning sensor device 2 through threaded fixing, without It will interfere with the battery cells or other devices in the battery or cause other adverse effects. A slight modification to the existing lithium power battery structure can meet the requirements of use. At the same time, combined with the typical characteristics of thermal runaway of lithium batteries: increased air pressure and smoke generation, the early warning sensor device 2 is designed to adopt a pressure sensor 21 and a smoke sensor 22, and other sensors can be added to the No. 1 connector 20, thereby realizing the battery thermal runaway detection function. Moreover, the power supply 32 in the communication power supply device 3 is independently powered, and the lithium battery does not need to be connected to the device for power supply, thereby not affecting the original BMS device of the battery to the battery cell related detection and control functions, and will not affect the normal operation of the device due to abnormalities in the BMS or the battery cell.

[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-reliability lithium-ion battery thermal runaway warning sensor device, comprising a mounting locking device (1), characterized in that: The mounting locking device (1) is a threaded fixing method; a sensor is mounted on one end of the mounting locking device (1) and a power supply, communication, control and indication circuit is mounted on the other end.

2. The high-reliability lithium power battery thermal runaway early warning sensor device according to claim 1 is characterized in that: The early warning sensor device is installed with a locking device which is locked and fixed by means of threads, and the thread root is in close contact with the battery box body through a sealing rubber pad to maintain sealing.

3. The high-reliability lithium power battery thermal runaway early warning sensor device according to claim 1 is characterized in that: One end of the early warning sensor device equipped with a sensor extends into the lithium power battery box, and the sensor is any one or a combination of a pressure sensor and a smoke sensor.

4. The high-reliability lithium power battery thermal runaway early warning sensor device according to claim 3 is characterized in that: One end of the early warning sensor device equipped with power supply, communication, control and indication circuits does not need to be placed in the battery box. It is connected to the sensor at the other end through a sealed connector or wire or flexible cable to power the sensor and read the sensor data.

5. The high-reliability lithium power battery thermal runaway early warning sensor device according to claim 1, characterized in that: The early warning sensor device is powered by a non-lithium power battery pack power supply method to power the sensor.

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