Battery fire extinguishing device using battery temperature sensing

Abstract

The present invention relates to a battery fire extinguishing device using battery temperature sensing, the battery fire extinguishing device using battery temperature sensing comprising a battery control unit (10), a vacuum pump device (20), battery cells (51, 52, 53...61, 62, 63....71, 72, 73...), and a gas supply device (30), wherein: the battery control unit (10) is operated by receiving power from the outside or from a battery power supply unit and comprises a vacuum pump device control unit, a gas supply device control unit, a battery cell temperature sensing unit, and a battery cell pressure sensing unit; the battery cells (51, 52, 53,...61, 62, 63,...71, 72, 73...) each have a solenoid valve (51-1, 52-1, 53-1, 61-1, 62-1, 63-1, 71-1, 72-1, 73-1) connected to one side thereof; the solenoid valves are electrically connected to the vacuum pump device (20); the battery cells (51, 52, 53,...61, 62, 63,...71, 72, 73...) each have a check valve (51-2, 52-2, 53-2, 61-2, 62-2, 63-2, 71-2, 72-2, 73-2) connected to the other side thereof; and the check valves are electrically connected to the gas supply device (20).

Description

Battery extinguishing device using battery temperature detection

[0001] The present invention relates to a battery fire extinguishing device using battery temperature detection, and more specifically, to a new type of battery fire extinguishing device using battery temperature detection, which comprises a temperature sensor for each battery cell in a battery module in which a plurality of battery cells are electrically connected, detects the temperature of each battery cell, and activates a vacuum pump and a gas supply device when a fire state is reached, thereby enabling concentrated extinguishment of a specific battery cell that has reached a fire state, thereby preventing fire.

[0002] In 2021, global electric vehicle production reached approximately 6.6 million units, a rapid increase. As electric vehicles expand in popularity, the frequency of battery fires is also increasing.

[0003]

[0004] Figure 1 is a schematic drawing of a battery module using a battery module exterior material according to the prior art.

[0005] Referring to Fig. 1, a battery cell (1) is a basic unit of a battery that can be used by charging and discharging electric energy. A battery module (11) is a battery assembly that combines a certain number of battery cells (1). A battery pack (21) is made by mounting a BMS (Battery Management System, 27) or the like on a battery module (11), and is the final form of a battery device mounted on an electric vehicle.

[0006] A plurality of battery cells (1) form a battery module (11), a plurality of battery modules (11) form a battery pack (21), and the battery pack (21) can be built into an electric vehicle.

[0007] The battery module (11) can accommodate at least one battery cell (1) therein.

[0008] The battery module outer case (25) forms the exterior of the battery module (11) and can protect the battery cells (1) housed inside from external impact, heat, and vibration.

[0009] The battery module outer case (215) is not limited to a specific shape as long as it can form the exterior of the battery module (11) and protect the interior. For example, the battery module outer case (25) may be formed in a hexahedral shape. In this case, the battery module outer case (25) may include a battery module upper case (20a) and a battery module lower case (20b). The battery module upper case (20a) may have an open lower side, and the battery module lower case (20b) may have an open upper side. The battery cells (1) may be stacked vertically or horizontally on the battery module upper case (20a) or the battery module lower case (20b). Each battery cell (1) may be arranged in contact with an adjacent battery cell (1) or may be arranged spaced apart from each other by a predetermined interval.

[0010] The battery pack (21) can accommodate at least one battery module (11) therein.

[0011]

[0012] Electric vehicles equipped with such batteries are becoming widespread, but electric vehicle batteries, in particular, are prone to thermal runaway when a fire breaks out, making them difficult to extinguish. While various methods of extinguishing fires exist, including water-based fire extinguishers, suffocating fire covers, and portable water tanks, fires that originate inside the battery housing are extinguished with extinguishing fluid injected from outside the battery housing. This necessitates a large amount of extinguishing fluid and a long time to extinguish the fire, making rapid extinguishment difficult. Furthermore, if the battery overheats, it can explode and spread to nearby battery modules and vehicles. Furthermore, if a fire breaks out in an underground parking lot, extinguishing the fire is practically impossible.

[0013]

[0014] [Prior Art Literature]

[0015] Republic of Korea Patent Registration No. 10-2615920 (registered on November 27, 2023) (Title of invention: Self-extinguishing battery module and battery pack exterior material)

[0016] The present invention has been proposed in consideration of the above-mentioned conventional necessity, and more specifically, the present invention has been devised to solve the above-mentioned problem, and the purpose of the present invention is to provide a new type of battery temperature detection-based fire extinguishing device, which comprises a temperature sensor for each battery cell in a battery module in which a plurality of battery cells are electrically connected, detects the temperature of each battery cell, and activates a vacuum pump and a gas supply device when a fire state is reached, thereby enabling concentrated extinguishment of a specific battery cell that has reached a fire state, thereby preventing fire.

[0017] In order to achieve the above-mentioned purpose, a battery extinguishing device using battery temperature detection according to one embodiment of the present invention is provided.

[0018] In a battery extinguishing device using battery temperature detection,

[0019] A battery extinguishing device using battery temperature detection, including a battery control unit, a vacuum pump unit, and a battery cell and a gas supply unit,

[0020] The battery control unit operates by receiving power from an external or battery power supply, and includes a vacuum pump device control unit, a gas supply device control unit, a battery cell temperature detection unit, and a battery cell pressure detection unit.

[0021] Each battery cell has a solenoid valve connected to one side.

[0022] The solenoid valve is electrically connected to the vacuum pump device,

[0023] Each battery cell has a check valve connected to the other side, and the check valve is electrically connected to the gas supply device.

[0024] A battery extinguishing device using battery temperature detection is provided, characterized in that the battery control unit transmits a control signal to a vacuum pump device so that the solenoid valve of the battery cell is operated when a battery cell whose temperature has risen is specified.

[0025] As described above, according to the battery extinguishing device using battery temperature detection according to the present invention, in a battery module in which a plurality of battery cells are electrically connected, a temperature sensor is provided for each battery cell, and when the temperature of each battery cell is detected and a fire state is reached, a vacuum pump and a gas supply device are activated so that a specific battery cell that has reached a fire state can be extinguished intensively, thereby preventing fire.

[0026] FIG. 1 is a schematic drawing of a battery module using a battery module exterior material according to the prior art. FIG. 1 is a schematic drawing of a battery module using a battery module exterior material according to the prior art.

[0027] Figure 2 is a schematic circuit block diagram of a battery extinguishing device using battery temperature detection according to the present invention.

[0028] In order to achieve the above-mentioned purpose, a battery extinguishing device using battery temperature detection according to one embodiment of the present invention is provided.

[0029] In a battery extinguishing device using battery temperature detection,

[0030] A battery extinguishing device using battery temperature detection, including a battery control unit, a vacuum pump unit, and a battery cell and a gas supply unit,

[0031] The battery control unit operates by receiving power from an external or battery power supply, and includes a vacuum pump device control unit, a gas supply device control unit, a battery cell temperature detection unit, and a battery cell pressure detection unit.

[0032] Each battery cell has a solenoid valve connected to one side.

[0033] The solenoid valve is electrically connected to the vacuum pump device,

[0034] Each battery cell has a check valve connected to the other side, and the check valve is electrically connected to the gas supply device.

[0035] A battery extinguishing device using battery temperature detection is provided, characterized in that the battery control unit transmits a control signal to a vacuum pump device so that the solenoid valve of the battery cell is operated when a battery cell whose temperature has risen is specified.

[0036] In addition, the battery control unit is characterized by always checking the temperature of the battery cell step by step and generating an alarm signal at 85 ℃ to 100 ℃, 101 ℃ to 150 ℃, and 151 ℃ to 180 ℃, respectively.

[0037] In addition, the battery control unit is characterized in that it immediately operates the vacuum pump device when the temperature of the battery cell reaches the final stage range, i.e., 151°C to 180°C.

[0038] In addition, when the vacuum pump is operated, the inside of the corresponding battery cell becomes vacuum (at this time, the pressure sensor is operated to check the pressure and the pressure status is transmitted to the battery control unit), and then, after a certain period of time (approximately 5 to 10 seconds), the gas supply device (30) is operated to supply fire extinguishing gas (CO2 gas) to the corresponding battery cell.

[0039] The present invention can be modified in various ways and has various embodiments, and specific embodiments are illustrated in the drawings and described in detail.

[0040] However, this is not intended to limit the present invention to a specific embodiment, but should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

[0041] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprise" or "have" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0042] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0043] Hereinafter, with reference to the attached drawings, preferred embodiments of the present invention will be described in more detail. In order to facilitate an overall understanding of the present invention, the same reference numerals will be used for identical components in the drawings, and redundant descriptions of identical components will be omitted.

[0044]

[0045] Hereinafter, embodiments of a battery extinguishing device using battery temperature detection according to the present invention will be described in detail with reference to the attached drawings.

[0046]

[0047] Figure 2 is a schematic circuit block diagram of a battery extinguishing device using battery temperature detection according to the present invention.

[0048] Referring to FIG. 2, a battery extinguishing device (100) using battery temperature detection includes a battery control unit (10), a vacuum pump device (20), and battery cells (51, 52, 53, .. 61, 62, 63 .. 71, 72, 73 ..), and a gas supply device (30).

[0049] The battery control unit (10) is a device similar to a BMS (Battery Management System, 27) electrically connected to a battery module (battery cells bundled together) that constitutes a battery pack (not shown) of the prior art.

[0050]

[0051] The battery control unit (10) is operated by receiving power (not shown) from an external source or a battery power supply unit, and includes a vacuum pump device control unit, a gas supply device control unit, a battery cell temperature detection unit, and a battery cell pressure detection unit (not shown).

[0052] The battery cells (51,52,53, ..61,62,63...71,72,73...) each have a solenoid valve (51-1,52-1,53-1,61-1,62-1,63-1,71-1,72-1,73-1) connected to one side thereof, and the solenoid valve is electrically connected to the vacuum pump device (20). Although not shown, it is of course possible that the solenoid valve can be operated by directly receiving a driving control signal from the battery control unit (10).

[0053]

[0054] Battery cells (51,52,53, ..61,62,63...71,72,73...) are each connected to a check valve (51-2,52-2,53-2,61-2,62-2,63-2,71-2,72-2,73-2) on the other side, and the check valve is electrically connected to the gas supply device (20). Of course, the check valve can be operated by directly receiving a drive control signal from the battery control unit (10).

[0055]

[0056] The battery extinguishing device using battery temperature detection according to the present invention configured as above,

[0057] The battery control unit (10) always checks the temperature of the battery cells (51,52,53, ..61,62,63...71,72,73...) step by step, for example, 85 ℃~100 ℃, 101 ℃~150 ℃, 151 ℃~180 ℃, (this is not a limitation, and the temperature range can be variably set), and can generate an alarm signal respectively, and when it reaches the final step range, that is, 151 ℃~180 ℃, the vacuum pump device (20) is immediately operated, and when the battery cell with the elevated temperature is specified, a control signal is transmitted to the vacuum pump device (20) so that the solenoid valve of the battery cell is operated, and thereafter, the vacuum pump makes the inside of the battery cell into a vacuum state, and thereafter, after a certain period of time (about 5 to 10 seconds) (not limited thereto), the gas supply device (30) is operated so that the battery cell Fire extinguishing gas (CO2 gas, but not limited thereto; a fire extinguishing liquid supply device may also be used in addition to a gas supply device) is supplied to the battery cell to extinguish the fire in the battery cell. At this time, the check valve of the battery cell can prevent the reverse flow of the supplied gas.

[0058]

[0059] As described above, according to the battery extinguishing device using battery temperature detection according to the present invention, in a battery module in which a plurality of battery cells are electrically connected, a temperature sensor is provided for each battery cell, and when the temperature of each battery cell is detected and a fire state is reached, a vacuum pump and a gas supply device are activated so that a specific battery cell that has reached a fire state can be extinguished intensively, thereby preventing fire.

Claims

1. In a battery extinguishing device using battery temperature detection, A battery extinguishing device using battery temperature detection, including a battery control unit, a vacuum pump unit, and a battery cell and a gas supply unit, The battery control unit is operated by receiving power from an external or battery power supply, and includes a vacuum pump device control unit, a gas supply device control unit, a battery cell temperature detection unit, and a battery cell pressure detection unit. Each battery cell has a solenoid valve connected to one side. The solenoid valve is electrically connected to the vacuum pump device, Each battery cell has a check valve connected to the other side, and the check valve is electrically connected to the gas supply device. A battery extinguishing device using battery temperature detection, characterized in that the battery control unit transmits a control signal to a vacuum pump device so that the solenoid valve of a specific battery cell is operated when a battery cell whose temperature has risen is specified.

2. In paragraph 1, A battery extinguishing device using battery temperature detection, characterized in that the battery control unit always checks the temperature of the battery cell in stages and generates an alarm signal at 85 ℃ to 100 ℃, 101 ℃ to 150 ℃, and 151 ℃ to 180 ℃, respectively.

3. In paragraph 1, A battery extinguishing device using battery temperature detection, characterized in that the battery control unit causes the vacuum pump device to operate immediately when the temperature of the battery cell reaches the final stage range, that is, 151°C to 180°C.

4. In paragraph 1, A battery fire extinguishing device using battery temperature detection characterized in that when the vacuum pump is operated, the interior of the corresponding battery cell becomes vacuumed (at this time, the pressure sensor is operated to check the pressure and transmit the pressure status to the battery control unit), and then, after a certain period of time (approximately 5 to 10 seconds), the gas supply device is operated to supply fire extinguishing gas (CO2 gas) to the corresponding battery cell.

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