Fire extinguishment / prevention device and test device

Abstract

To rapidly extinguish or prevent fire when a battery catches fire or is about to catch fire.SOLUTION: A fire extinguishment / prevention device 1 includes: a cylinder 2 that stores liquefied carbon dioxide; and a nozzle 3 that jets the liquefied carbon dioxide from the cylinder 2 into a housing 70 accommodating the battery 8 and supplies dry ice D to the battery 8.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The technology disclosed herein relates to fire extinguishing / fire prevention devices and test devices. [Background technology]

[0002] Conventionally, there is known a fire extinguishing / prevention device that extinguishes or prevents a fire in a battery when the battery undergoes thermal runaway and catches fire during a test such as a quality inspection. For example, a device disclosed in Patent Document 1 detects the storage location of a battery when an abnormality occurs in a battery stored in a storage facility. This device extinguishes the fire in the battery at the detected storage location using carbon dioxide gas. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-169475 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if it takes a long time to extinguish the fire, there is a risk that damage to normal batteries other than the battery with the abnormality will be greater. Therefore, it is important to shorten the fire extinguishing time. Also, if a battery is about to catch fire, and if the fire can be prevented, that is, if the fire can be prevented, damage to normal batteries can be reduced.

[0005] The technology disclosed herein has been made in consideration of these points, and its purpose is to quickly extinguish or prevent a fire when a battery catches fire or is about to catch fire. [Means for solving the problem]

[0006] The fire extinguishing and fire prevention device disclosed herein includes a cylinder for storing liquefied carbon dioxide gas, and a nozzle for spraying the liquefied carbon dioxide gas from the cylinder into a housing that contains a battery and for supplying dry ice to the battery.

[0007] The testing device disclosed herein includes the fire extinguishing / fire prevention device and a housing that contains the battery. Effect of the Invention

[0008] The fire extinguishing / prevention device can quickly extinguish or prevent a fire when a battery catches fire or is about to catch fire.

[0009] The testing device makes it possible to quickly extinguish or prevent a fire when a battery catches fire or when a battery is about to catch fire. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a schematic cross-sectional view of the test device as viewed from the side. [Diagram 2] 4 is a flowchart of injection control. [Diagram 3] FIG. 11 is a schematic cross-sectional view of a test device according to a modified example, seen from the side. [Figure 4] 10 is a flowchart of an injection control according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Exemplary embodiments will now be described in detail with reference to the accompanying drawings, in which: Fig. 1 is a schematic cross-sectional view of a test device 100 as viewed from the side.

[0012] The test device 100 tests a battery 8. For example, the test device 100 performs a charge / discharge test on the battery 8. The battery 8 is not limited to a specific type, but may be, for example, a secondary battery. Specifically, the battery 8 is a lithium ion battery. The test device 100 includes a fire extinguishing / fire protection device 1 and a housing 70 that houses the battery 8. The fire extinguishing / fire protection device 1 is attached to the housing 70.

[0013] The housing 70 is, for example, a thermostatic chamber. The housing 70 is formed in a substantially rectangular parallelepiped shape having a sealed internal space. The housing 70 has a partition wall 71 that divides the internal space into a test chamber 72 and an air-conditioning chamber 73. The partition wall 71 does not separate the test chamber 72 and the air-conditioning chamber 73 airtightly, but allows the test chamber 72 and the air-conditioning chamber 73 to communicate with each other. In this example, a pressure relief vent 92 is attached to the upper surface of the housing 70. The pressure relief vent 92 is opened when the pressure inside the housing 70 becomes abnormally high. This prevents the housing 70 from being damaged.

[0014] A battery 8 is disposed in the test chamber 72. An evaluation device such as a tester (not shown) is connected to the battery 8. An air conditioner 91 and a blower 93 are disposed in the air conditioning chamber 73. The air conditioner 91 cools, heats, dehumidifies, or humidifies the air in the housing 70. The blower 93 is, for example, a fan. The blower 93 circulates air between the air conditioning chamber 73 and the test chamber 72. In this example, an air inlet 71a is formed at the upper end of the partition wall 71, and an air outlet 71b is formed at the lower end of the partition wall 71. In this disclosure, "inflow" and "outflow" refer to the flow of air as viewed from the test chamber 72. That is, the air circulates so that it flows in from the inlet 71a and flows out from the outlet 71b as viewed from the test chamber 72. Note that the air outlet 71b may be formed at the upper end of the partition wall 71, and the air inlet 71a may be formed at the lower end of the partition wall 71.

[0015] The fire extinguishing / fire prevention device 1 uses dry ice D to extinguish or prevent a fire in the battery 8 when the battery 8 catches fire or is about to catch fire during a battery 8 test. The fire extinguishing / fire prevention device 1 includes a cylinder 2 for storing liquefied carbon dioxide gas, and a nozzle 3 for spraying the liquefied carbon dioxide gas from the cylinder 2 into a housing 70 and supplying dry ice D to the battery 8. The cylinder 2 stores liquefied carbon dioxide gas under high pressure. The cylinder 2 is disposed outside the housing 70. The nozzle 3 is disposed in a test chamber 72. Since the air pressure inside the housing 70 is approximately atmospheric pressure, the liquefied carbon dioxide gas changes to dry ice D immediately after being sprayed from the nozzle 3 or after a short time has passed. This dry ice D comes into contact with the battery 8, and the battery 8 is extinguished or prevented from burning. More specifically, the dry ice D blocks contact of the battery 8 with oxygen and cools the battery 8.

[0016] Specifically, in terms of the vertical position, the nozzle 3 is disposed above the batteries 8. This allows the dry ice D, which is converted from liquefied carbon dioxide gas near the nozzle 3, to fall and easily come into contact with the batteries 8. In the nozzle 3, the nozzle outlet for the dry ice D faces the batteries 8. This allows the dry ice D to be efficiently supplied to the batteries 8.

[0017] The fire extinguishing / fire prevention device 1 further includes at least one sensor 4 of a first temperature sensor 41, a smoke sensor 43, and a gas sensor 44, and a valve 5 arranged in a flow path 51 for liquefied carbon dioxide gas extending between the cylinder 2 and the nozzle 3. The flow path 51 is, for example, a metal pipe. The fire extinguishing / fire prevention device 1 opens the valve 5 based on the detection result of the sensor 4, and supplies dry ice D to the battery 8.

[0018] The first temperature sensor 41 detects the temperature inside the housing 70. In this example, the first temperature sensor 41 detects the temperature of the atmosphere inside the test chamber 72. The first temperature sensor 41 is disposed inside the test chamber 72. More specifically, the first temperature sensor 41 is disposed near the outlet 71b. That is, the first temperature sensor 41 is disposed downwind of the battery 8. The first temperature sensor 41 outputs an abnormality signal to the valve 5 when the detected temperature is equal to or higher than a first threshold value. The first threshold value is a temperature that is a boundary between the normal temperature inside the housing 70 and the abnormal temperature inside the housing 70 when the battery 8 is igniting or about to ignite, and is set in advance.

[0019] The smoke sensor 43 detects smoke inside the housing 70. In terms of the vertical position, the smoke sensor 43 is disposed above the battery 8. This allows the smoke moving upward to be efficiently detected. When smoke is detected, the smoke sensor 43 outputs an abnormality signal to the valve 5.

[0020] The gas sensor 44 detects gas in the housing 70. The gas to be detected is a gas that may be released from the battery 8 when it is igniting or about to ignite, and depends on the battery 8. The gas sensor 44 is disposed at a predetermined position in the test chamber 72 according to the gas to be detected. That is, when the gas to be detected is a gas lighter than air (e.g., hydrogen), the gas sensor 44 is preferably disposed above the battery 8 in the vertical direction. When the gas to be detected is a gas heavier than air (e.g., hydrogen sulfide), the gas sensor 44 is preferably disposed below the battery 8 in the vertical direction. When the gas to be detected is a gas with the same weight as air (e.g., carbon monoxide), the gas sensor 44 may be disposed at any position in the test chamber 72. When gas is detected, the gas sensor 44 outputs an abnormality signal to the valve 5.

[0021] The valve 5 opens and closes the cylinder 2. In this example, the valve 5 is an electric valve. Specifically, the valve 5 is an electromagnetic valve. When an abnormal signal is input from the sensor 4, the valve 5 determines that the battery 8 is igniting or about to ignite, and opens the valve. That is, the valve 5 opens based on the detection result of the sensor 4. Specifically, the valve 5 opens when the temperature detected by the first temperature sensor 41 is equal to or higher than the first threshold value, when smoke is detected by the smoke sensor 43, or when gas is detected by the gas sensor 44. When the valve 5 opens, liquefied carbon dioxide gas is supplied from the cylinder 2 to the nozzle 3, and the liquefied carbon dioxide gas is sprayed from the nozzle 3.

[0022] Next, a description will be given of the injection control executed by the valve 5. Fig. 2 is a flowchart of the injection control.

[0023] For example, when the power is turned on, the valve 5 executes the processes of steps S101, S102, and S103. Steps S101, S102, and S103 are processed in parallel. Specifically, in step S101, the valve 5 judges whether an abnormal signal is input from the first temperature sensor 41, that is, whether the temperature detected by the first temperature sensor 41 is equal to or higher than the first threshold. If it is equal to or higher than the first threshold, the process proceeds to step S104, and if it is not equal to or higher than the first threshold, the process repeats step S101. In step S102, the valve 5 judges whether an abnormal signal is input from the smoke sensor 43, that is, whether smoke is detected by the smoke sensor 43. If smoke is detected, the process proceeds to step S104, and if smoke is not detected, the process repeats step S102. In step S103, the valve 5 judges whether an abnormal signal is input from the gas sensor 44, that is, whether gas is detected by the gas sensor 44. If gas is detected, the process proceeds to step S104, and if gas is not detected, step S103 is executed again.

[0024] In at least one of the cases where it is determined in step S101 that the temperature detected by the first temperature sensor 41 is equal to or higher than the first threshold value, where it is determined in step S102 that smoke is detected by the smoke sensor 43, and where it is determined in step S103 that gas is detected by the gas sensor 44, the valve 5 opens in step S104. As a result, liquefied carbon dioxide gas is sprayed from the nozzle 3, and dry ice D is supplied to the battery 8.

[0025] According to such injection control, when the battery 8 goes into thermal runaway (i.e., when it generates abnormal heat), any one of the first temperature sensor 41, the smoke sensor 43, and the gas sensor 44 detects the abnormality of the battery 8 and outputs an abnormality signal to the valve 5. When the abnormality signal is input to the valve 5, the dry ice D is supplied to the battery 8. When the battery 8 goes into thermal runaway and ignites, if the dry ice D comes into contact with the battery 8, the dry ice D sublimes and changes to carbon dioxide gas due to the heat generated by the battery 8. The housing 70 is filled with carbon dioxide gas, so that the ignited battery 8 is extinguished by suffocation. In particular, in the test device 100, when the dry ice D changes to carbon dioxide gas and the pressure in the housing 70 increases, the pressure relief vent 92 is opened and the air in the housing 70 is replaced with carbon dioxide gas. Therefore, suffocation extinguishing can be performed efficiently. Here, when the battery 8 goes into thermal runaway and generates abnormal heat, for example, the electrolyte of the battery 8 is decomposed, and oxygen may be generated. That is, the battery 8 itself becomes an oxygen supplier for combustion, and smothering extinction may be hindered. When the dry ice D comes into contact with the battery 8, the battery 8 is directly cooled. Furthermore, the latent heat of sublimation of the dry ice D during sublimation is taken from the battery 8, and the battery 8 is further cooled. This suppresses abnormal heat generation in the battery 8 and suppresses the generation of oxygen. As a result, smothering extinction is performed efficiently, and the battery 8 can be quickly extinguished. Even if the battery 8 is about to catch fire, as described above, the direct cooling of the battery 8 by the dry ice D and the cooling of the battery 8 by the latent heat of sublimation of the dry ice D can prevent the battery 8 from catching fire and quickly calm the thermal runaway of the battery 8. That is, fire prevention of the battery 8 can be quickly achieved.

[0026] In the fire extinguishing / prevention device 1, the battery 8 is extinguished or prevented from burning using the dry ice D, so that the battery 8 can be extinguished or prevented from burning quickly. If the battery 8 is extinguished or prevented from burning using only carbon dioxide gas, there is a risk that the battery 8 cannot be extinguished or prevented from burning quickly. In detail, when the battery 8 burns due to thermal runaway, as described above, the battery 8 itself can become an oxygen supplier for combustion, so that suffocation extinguishing is hindered. Therefore, there is a risk that the fire extinguishing time will be long. When the battery 8 is about to burn, the battery 8 cannot be cooled by only carbon dioxide gas, so that the abnormal heat generation of the battery 8 cannot be suppressed. Therefore, the battery 8 cannot be prevented from burning, so that the battery 8 cannot be prevented from burning. As described above, in the fire extinguishing / prevention device 1, when the battery 8 burns due to thermal runaway, the battery 8 is cooled by the dry ice D, so that the generation of oxygen from the battery 8 is suppressed, and suffocation extinguishing can be efficiently performed. This shortens the fire extinguishing time. Even if the battery 8 is on the verge of catching fire, the dry ice D cools the battery 8, preventing the battery 8 from catching fire and quickly calming down any thermal runaway of the battery 8. As a result, the battery 8 can be quickly extinguished or prevented from catching fire.

[0027] Furthermore, in the fire extinguishing and fire prevention device 1, the dry ice D is generated from the liquefied carbon dioxide gas stored in the cylinder 2, so the equipment can be simplified. If the dry ice D were stored outside the housing 70 and used for fire extinguishing, a large-scale facility would be required to store the dry ice D. On the other hand, if the liquefied carbon dioxide gas is stored in the cylinder 2, management is easy and the equipment can be simplified.

[0028] Furthermore, the fire extinguishing / fire prevention device 1 uses the dry ice D and the carbon dioxide gas produced by sublimation of the dry ice D as a fire extinguishing agent, so that contamination of the battery 8 and the housing 70 by the fire extinguishing agent can be suppressed.

[0029] Furthermore, the fire extinguishing / fire prevention device 1 opens the valve 5 based on the detection results of the multiple types of sensors 4 (three types in this example). Therefore, the fire extinguishing / fire prevention device 1 can quickly detect abnormal heat generation in the battery 8 and extinguish or prevent the battery 8. As a result, fire extinguishing or prevention can be performed even more quickly. In addition, since abnormalities in the battery 8 are detected by the multiple types of sensors 4, even if any of the multiple types of sensors 4 does not function normally due to a malfunction or the like, the battery 8 can be quickly extinguished or prevented. Particularly in this example, the first temperature sensor 41 is disposed near the outlet 71b. That is, the first temperature sensor 41 is disposed on the downwind side of the battery 8. Therefore, the first temperature sensor 41 can detect abnormal heat generation in the battery 8 more quickly than when the first temperature sensor 41 is disposed on the upwind side of the battery 8.

[0030] Next, a test device 200 according to a modified example will be described. Fig. 3 is a schematic cross-sectional view of the test device 200 according to the modified example seen from the side. The test device 200 differs from the test device 100 in the configuration of a fire extinguishing / fire protection device 201. Specifically, the test device 200 differs from the test device 100 in that the test device 200 includes a second temperature sensor 42 and does not include a smoke sensor 43 and a gas sensor 44. The following description will focus on the differences from the test device 100.

[0031] The second temperature sensor 42 detects the temperature of the battery 8. The second temperature sensor 42 is attached to the battery 8. The second temperature sensor 42 outputs an abnormality signal to the valve 5 when the detected temperature is equal to or higher than the second threshold. The second threshold is a preset temperature that is a boundary between the normal temperature of the battery 8 under test and the abnormal temperature of the battery 8 when the battery 8 is catching fire or is about to catch fire. In this example, the second threshold is lower than the first threshold.

[0032] The valve 5 opens when an abnormality signal is input from the second temperature sensor 42, i.e., when the temperature detected by the second temperature sensor 42 is equal to or higher than the second threshold. In this example, the valve 5 opens when the temperature detected by the first temperature sensor 41 is equal to or higher than the first threshold, or when the temperature detected by the second temperature sensor 42 is equal to or higher than the second threshold.

[0033] Next, a description will be given of the injection control executed by the valve 5. Fig. 4 is a flowchart of the injection control.

[0034] For example, when the power is turned on, the valve 5 executes the processes of steps S201 and S202. Steps S201 and S202 are processed in parallel. That is, in step S201, the valve 5 judges whether or not an abnormal signal is input from the first temperature sensor 41, that is, whether or not the temperature detected by the first temperature sensor 41 is equal to or higher than the first threshold. If it is equal to or higher than the first threshold, the process proceeds to step S203, and if it is not equal to or higher than the first threshold, the process repeats step S201. In step S202, the valve 5 judges whether or not an abnormal signal is input from the second temperature sensor 42, that is, whether or not the temperature detected by the second temperature sensor 42 is equal to or higher than the second threshold. If it is equal to or higher than the second threshold, the process proceeds to step S203, and if it is not equal to or higher than the second threshold, the process repeats step S202.

[0035] In at least one of the cases where it is determined in step S201 that the temperature detected by the first temperature sensor 41 is equal to or higher than the first threshold value and where it is determined in step S202 that the temperature detected by the second temperature sensor 42 is equal to or higher than the second threshold value, the valve 5 opens in step S203. As a result, liquefied carbon dioxide gas is sprayed from the nozzle 3, and dry ice D is supplied to the battery 8.

[0036] According to such a fire extinguishing / fire prevention device 201, since the second temperature sensor 42 directly detects the temperature of the battery 8, abnormal heat generation of the battery 8 can be detected quickly. Therefore, the battery 8 can be quickly extinguished or prevented from being burned. In this example, since the first temperature sensor 41 is provided in addition to the second temperature sensor 42, even if the second temperature sensor 42 does not function normally due to a malfunction or the like, the battery 8 can be quickly extinguished or prevented from being burned. Furthermore, the second threshold value corresponding to the second temperature sensor 42 is lower than the first threshold value corresponding to the first temperature sensor 41. As a result, the first temperature sensor 41 and the second temperature sensor 42 can be used differently so that the first temperature sensor 41 detects an abnormal temperature of the atmosphere in the test chamber 72 when the battery 8 has ignited, and the second temperature sensor 42 detects an abnormal temperature of the battery 8 when the battery 8 is about to ignite. As a result, when the battery 8 is about to ignite, the battery 8 is cooled to prevent fire, and when the battery 8 has ignited, the battery 8 is cooled and smothered to extinguish the fire. In this way, fire extinguishing or prevention can be performed appropriately depending on the abnormal state of the battery 8.

[0037] Other Embodiments As described above, the above embodiment has been described as an example of the technology disclosed in this application. However, the technology in this disclosure is not limited to this, and can be applied to embodiments in which modifications, replacements, additions, omissions, etc. are appropriately performed. In addition, it is also possible to combine the components described in the above embodiment to form a new embodiment. In addition, among the components described in the attached drawings and detailed description, not only components essential for solving the problem but also components that are not essential for solving the problem in order to exemplify the technology may be included. Therefore, the fact that these non-essential components are described in the attached drawings and detailed description should not immediately be taken to mean that these non-essential components are essential.

[0038] For example, the fire extinguishing / fire protection device 1 may be detachably attached to the housing 70, or may be integrated with the housing 70. The housing 70 does not have to be a thermostatic chamber, and may be, for example, a storage cabinet. When the housing 70 is a storage cabinet, the internal space of the housing 70 does not have to be divided by the partition wall 71. In other words, the housing 70 does not have to have the air-conditioning room 73. The air-conditioning equipment 91 and the blower 93 are not essential.

[0039] The position of the nozzle 3 in the housing 70 is not limited. In terms of the vertical position, the nozzle 3 may be disposed below the battery 8. In the above example, the number of nozzles 3 is not limited to one, and may be two or more. The valve 5 may be a manual valve.

[0040] The fire extinguishing / fire prevention device 1 includes three sensors 4, the first temperature sensor 41, the smoke sensor 43, and the gas sensor 44, but may include at least one of the three sensors 4. As shown in the flow chart of FIG. 2, in the fire extinguishing / fire prevention device 1, the valve is opened when the detection result of any one of the first temperature sensor 41, the smoke sensor 43, and the gas sensor 44 is abnormal. However, the valve may be opened when the detection results of any two of the first temperature sensor 41, the smoke sensor 43, and the gas sensor 44 are abnormal, or when the detection results of all the sensors 4 are abnormal. The smoke sensor 43 may detect smoke concentration and output an abnormality signal to the valve 5 when the smoke concentration is equal to or greater than a predetermined threshold. Similarly, the gas sensor 44 may detect gas concentration and output an abnormality signal to the valve 5 when the gas concentration is equal to or greater than a predetermined threshold. The fire extinguishing / fire prevention device 1 may not include the sensor 4 and the valve 5. For example, the liquefied carbon dioxide gas may be sprayed from the nozzle 3 through the flow path 51 simply by manually operating the opening / closing valve of the cylinder 2.

[0041] The first temperature sensor 41 does not have to be disposed near the outlet 71b. For example, the first temperature sensor 41 may be disposed on the downwind side of the battery 8, near the battery 8.

[0042] The test device 200 does not necessarily have to include the first temperature sensor 41. The test device 200 may further include a smoke sensor 43 and a gas sensor .

[0043] The flowchart is merely an example. Steps in the flowchart may be changed, replaced, added, omitted, etc. as appropriate. The order of steps in the flowchart may be changed, and serial processing may be performed in parallel. For example, in the flowchart shown in FIG. 4, a step S204 may be added after step S203 in which the valve 5 determines whether the temperature detected by the second temperature sensor 42 is less than the second threshold value. If it is determined in step S204 that the temperature is less than the second threshold value, a step S205 in which the valve 5 is closed may be added. If it is determined in step S204 that the temperature is not less than the second threshold value, the process may return to step S203. This allows the fire extinguishing / fire prevention device 1 to stop spraying liquefied carbon dioxide gas when the thermal runaway of the battery 8 subsides.

[0044] The techniques disclosed herein can be summarized as follows:

[0045] [1] The fire extinguishing / fire prevention device 1,201 includes a cylinder 2 for storing liquefied carbon dioxide gas, and a nozzle 3 for spraying the liquefied carbon dioxide gas from the cylinder 2 into a housing 70 that contains a battery 8, and supplying dry ice D to the battery 8.

[0046] According to this configuration, the battery 8 is extinguished or prevented from being ignited using the dry ice D, so that the battery 8 can be extinguished or prevented from being ignited quickly. In detail, if the battery 8 goes into thermal runaway and catches fire, when the dry ice D comes into contact with the battery 8, the dry ice D sublimates and changes into carbon dioxide gas due to the heat generated by the battery 8. The housing 70 is filled with carbon dioxide gas, so that the ignited battery 8 is extinguished by suffocation. If the battery 8 goes into thermal runaway and generates abnormal heat, for example, the electrolyte of the battery 8 may decompose and generate oxygen. That is, the battery 8 itself becomes an oxygen supplier for combustion, and suffocation extinguishing may be hindered. In the fire extinguishing and fire prevention device 1,201, when the dry ice D comes into contact with the battery 8, the battery 8 is directly cooled. Furthermore, the latent heat of sublimation of the dry ice D during sublimation is taken from the battery 8, so that the battery 8 is further cooled. This suppresses abnormal heat generation of the battery 8 and suppresses the generation of oxygen. As a result, suffocation extinguishing is performed efficiently, and the battery 8 can be extinguished in a short time. Even if the battery 8 is on the verge of catching fire, as described above, the direct cooling of the battery 8 by the dry ice D and the cooling of the battery 8 by the latent heat of sublimation of the dry ice D suppresses abnormal heat generation in the battery 8 and calms thermal runaway of the battery 8. In other words, fire prevention of the battery 8 can be achieved quickly.

[0047] [2] The fire extinguishing / fire protection device 1,201 described in [1] further comprises at least one sensor 4 selected from a first temperature sensor 41 for detecting a temperature within the housing 70, a smoke sensor 43 for detecting smoke within the housing 70, and a gas sensor 44 for detecting gas within the housing 70, and a valve 5 arranged in a flow path 51 of the liquefied carbon dioxide gas extending between the cylinder 2 and the nozzle 3, and the valve 5 opens based on the detection result of the sensor 4.

[0048] According to this configuration, the opening of the valve 5 is controlled based on the detection result of the sensor 4, so that an abnormality in the battery 8 can be detected more quickly and a fire can be extinguished or prevented in the battery 8 more quickly than in the case where the cylinder 2 is opened and closed manually. As a result, a fire can be extinguished or prevented in the battery 8 more quickly.

[0049] [3] In the fire extinguishing / fire protection device 1,201 described in [1] or [2], the sensor 4 includes at least the first temperature sensor 41, and the first temperature sensor 41 is arranged in the vicinity of an air outlet 71b formed in the housing 70.

[0050] According to this configuration, the first temperature sensor 41 can be disposed downwind of the battery 8. Therefore, the first temperature sensor 41 can detect abnormal heat generation in the battery 8 more quickly than if the first temperature sensor 41 were disposed upwind of the battery 8.

[0051] [4] The fire extinguishing / fire protection device 1,201 described in any one of [1] to [3] further comprises a second temperature sensor 42 for detecting the temperature of the battery 8, and a valve 5 arranged in a flow path 51 of the liquefied carbon dioxide extending between the cylinder 2 and the nozzle 3, and the valve 5 opens when the temperature detected by the second temperature sensor 42 is equal to or higher than a second threshold value.

[0052] According to this configuration, the second temperature sensor 42 directly detects the temperature of the battery 8, and therefore thermal runaway of the battery 8 can be quickly detected, and a fire can be extinguished or prevented in the battery 8. As a result, a fire can be extinguished or prevented in the battery 8 more quickly.

[0053] [5] The fire extinguishing / fire protection device 1,201 described in any one of [1] to [4] further includes a first temperature sensor 41 for detecting a temperature inside the housing 70, and the valve 5 opens when the temperature detected by the first temperature sensor 41 is equal to or higher than a first threshold value, and the second threshold value is lower than the first threshold value.

[0054] According to this configuration, the first temperature sensor 41 and the second temperature sensor 42 can be used differently such that the first temperature sensor 41 detects an abnormal temperature inside the housing 70 when the battery 8 catches fire, and the second temperature sensor 42 detects an abnormal temperature of the battery 8 when the battery 8 is about to catch fire. As a result, the battery 8 is cooled to prevent fire when the battery 8 is about to catch fire, and the battery 8 is cooled and smothered to extinguish the fire when the battery 8 has caught fire. In this way, fire extinguishing or fire prevention can be performed appropriately depending on the abnormal state of the battery 8.

[0055] [6] The test device 100, 200 includes the fire extinguishing / fire prevention device 1, 201 according to any one of [1] to [5] and a housing 70 that houses the battery 8.

[0056] According to this configuration, a testing device that can quickly extinguish or prevent a fire can be realized. [Explanation of symbols]

[0057] 100,200 Test Equipment 1,201 Fire extinguishing and fire protection equipment 2 Cylinders 3 Nozzles 4 Sensors 41 First temperature sensor 42 Second temperature sensor 43 Smoke Sensor 44 Gas Sensor 5 Valves 51 Flow Path 70 Housing 71a Inlet 71b Outlet 8 batteries D. Dry ice

Claims

1. A cylinder for storing liquefied carbon dioxide gas; A fire extinguishing / fire prevention device comprising: a nozzle for spraying the liquefied carbon dioxide gas from the cylinder into a housing containing a battery and supplying dry ice to the battery.

2. The fire extinguishing / protection device according to claim 1, at least one of a first temperature sensor for detecting a temperature within the housing, a smoke sensor for detecting smoke within the housing, and a gas sensor for detecting gas within the housing; and a valve disposed in a flow path of the liquefied carbon dioxide gas extending between the cylinder and the nozzle, The valve is a fire extinguishing / fire protection device that opens based on the detection result of the sensor.

3. The fire extinguishing / protection device according to claim 2, The sensor includes at least the first temperature sensor, The first temperature sensor is disposed near an air outlet formed in the housing.

4. The fire extinguishing / protection device according to claim 1, a second temperature sensor for detecting a temperature of the battery; and a valve disposed in a flow path of the liquefied carbon dioxide gas extending between the cylinder and the nozzle, The valve is a fire extinguishing / fire protection device that opens when the temperature detected by the second temperature sensor is equal to or higher than a second threshold value.

5. 5. The fire extinguishing / protection device according to claim 4, a first temperature sensor for detecting a temperature inside the housing; The valve opens when the temperature detected by the first temperature sensor is equal to or higher than a first threshold value, A fire extinguishing / protection device, wherein the second threshold is lower than the first threshold.

6. A fire extinguishing / protection device according to any one of claims 1 to 5; and a housing for receiving the battery.

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