Battery safety evaluation device

Abstract

The present invention relates to a battery safety evaluation device, and provides a battery safety evaluation device capable of quantitatively analyzing gas released from a battery, the position of a flame, and the temperature over time.

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0148296 filed on November 9, 2022, and all the contents disclosed in the document of the Korean Patent Application are included as part of this specification.

[0002] The present invention relates to a battery safety evaluation device, and more particularly, to a battery safety evaluation device capable of quantitatively analyzing over time the gas released from a battery, the position and temperature of a flame.

Background Art

[0003] During experiments on batteries that pose a risk of ignition and explosion, a sealed chamber is used to ensure the safety of researchers and to collect and analyze the gases generated by the battery. At this time, the gases generated by the battery change in composition and generation amount in real time depending on kinetic characteristics (SOC, battery temperature, evaluation atmospheric environment conditions, etc.). Furthermore, if the composition and generation amount of the gas change, physical characteristics such as the temperature and density of the gas also change.

[0004] Understanding the position and temperature distribution of the gas and flame ejected outside the battery when an excessive amount of gas is generated inside the battery and when the battery catches fire is very important in designing the battery itself and the device including the battery.

[0005] Conventionally, a thermal imaging camera has been used to measure the temperature distribution of the gas and flame generated and ejected by a battery.

[0006] When a thermal imaging camera is installed inside a chamber for battery analysis, the thermal imaging camera is damaged due to the harsh conditions inside the chamber, and it has been difficult to operate a cooling device for the thermal imaging camera inside the chamber.

[0007] When a thermal imaging camera is installed outside the chamber used for battery analysis, the chamber requires a window made of a material that allows infrared light to pass through. However, chambers that require explosion protection and other safety considerations have limitations in terms of window specifications, which in turn limits the measurement scale.

[0008] Therefore, an effective technology is needed that can analyze the real-time temperature distribution caused by the gas and flames ejected from the battery located inside the chamber. [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] The present invention relates to a battery safety evaluation device, and aims to provide a battery safety evaluation device that can perform quantitative analysis over time on the location and temperature of gases emitted from a battery and flames.

[0010] The technical problems that this invention aims to solve are not limited to those described above, and any other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0011] The battery safety evaluation device of the present invention includes a stationary plate on which a battery is fixed to its upper surface, a chamber section in which a battery housing space for housing the stationary plate is formed, a temperature sensor section provided in the battery housing space, and a temperature analysis section that receives a temperature measurement signal from the temperature sensor section at regular intervals. The temperature sensor section is provided in multiple locations, and the multiple temperature sensor sections are provided at a certain distance apart from each other within the battery housing space. [Effects of the Invention]

[0012] The battery safety evaluation device of the present invention is capable of effectively analyzing the real-time temperature distribution caused by gas and flames ejected from a battery located inside a chamber.

[0013] The battery safety evaluation device of the present invention is capable of quantifying the position and temperature of gases and flames released from inside the battery to the outside over time.

[0014] The battery safety evaluation device of the present invention minimizes the number of consumable parts for repeated measurements and maximizes the reproducibility of the analysis. [Brief explanation of the drawing]

[0015] [Figure 1] This is a cross-sectional view showing the battery safety evaluation device of the present invention. [Figure 2] This is a plan view showing the positional relationship between the temperature sensor and the battery. [Figure 3] This is a cross-sectional view showing the chamber section. [Figure 4] This is a perspective view showing an embodiment in which the temperature sensor unit is coupled to a mounting plate. [Figure 5] This is a perspective view showing an embodiment in which the battery is fixed to a mounting plate. [Modes for carrying out the invention]

[0016] The battery safety evaluation device of the present invention includes a stationary plate on which a battery is fixed to its upper surface, a chamber section in which a battery housing space for housing the stationary plate is formed, a temperature sensor section provided in the battery housing space, and a temperature analysis section that receives a temperature measurement signal from the temperature sensor section at regular intervals. The temperature sensor section is provided in multiple locations, and the multiple temperature sensor sections are provided at a certain distance apart from each other within the battery housing space.

[0017] The stationary plate of the battery safety evaluation device of the present invention has a constant width in a first direction perpendicular to the vertical direction and is plate-shaped, extending in a second direction perpendicular to the vertical direction and the first direction.

[0018] In the battery safety evaluation device of the present invention, when a pair of virtual straight lines extending in the second direction with the battery interposed therebetween are defined as the first virtual line and the second virtual line, the plurality of temperature sensor units are also arranged such that at least one or more are provided on each of the first virtual line and the second virtual line.

[0019] In the battery safety evaluation device of the present invention, when a pair of virtual straight lines extending in the first direction with the battery interposed therebetween are defined as the third virtual line and the fourth virtual line, the plurality of temperature sensor units are also arranged at the positions of the intersection of the third virtual line and the first virtual line, the intersection of the third virtual line and the second virtual line, the intersection of the fourth virtual line and the first virtual line, and the intersection of the fourth virtual line and the second virtual line.

[0020] In the battery safety evaluation device of the present invention, when a pair of virtual straight lines extending in the first direction and located between one end and the other end of the battery are defined as the fifth virtual line, the plurality of temperature sensor units are also further arranged at the positions of the intersection of the fifth virtual line and the first virtual line and the intersection of the fifth virtual line and the second virtual line.

[0021] In the battery safety evaluation device of the present invention, a plurality of the fifth virtual lines are also provided.

[0022] In the battery safety evaluation device of the present invention, the temperature sensor unit is in the shape of a rod extending in the vertical direction.

[0023] In the battery safety evaluation device of the present invention, the temperature sensor unit includes a first measurement point and a second measurement point. The first measurement point is located at a position higher than the placement plate, and the second measurement point is located at a position lower than the placement plate.

[0024] In the battery safety evaluation device of the present invention, the temperature sensor unit further includes a third measurement point located between the first measurement point and the second measurement point. The third measurement point is located at a position even higher than the placement plate.

[0025] The battery safety evaluation device of the present invention includes a chamber portion comprising a body portion having one end in the second direction open to form an opening and a battery housing space formed inside, and a door portion covering the opening and coupled to the body portion, wherein one end of the mounting plate in the second direction is coupled to the surface of the door portion facing the opening, and the other end of the mounting plate in the second direction is inserted into the battery housing space through the opening.

[0026] In the battery safety evaluation device of the present invention, the upper ends of the plurality of temperature sensor units are fixed to the ceiling surface of the chamber unit, and the distance between the first virtual line and the second virtual line is even longer than the length of the mounting plate in the first direction.

[0027] In the battery safety evaluation device of the present invention, the plurality of temperature sensor units are fixed to the mounting plate in a state where they penetrate the mounting plate, and the distance between the first virtual line and the second virtual line is shorter than the length of the mounting plate in the first direction and longer than the length of the battery in the first direction.

[0028] The battery safety evaluation device of the present invention is also provided with a feedthrough in the door section for connecting the plurality of temperature sensor sections and the temperature analysis section by wire.

[0029] The battery safety evaluation device of the present invention further includes a lower jig whose bottom surface is fixed to the upper surface of the stationary plate, a first heat insulating layer laminated between the battery and the lower jig, a second heat insulating layer laminated on the upper surface of the battery, an upper jig that pressurizes the upper surface of the battery with the second heat insulating layer in between, a bottom surface temperature measuring sensor inserted between the first heat insulating layer and the battery, and a top surface temperature measuring sensor inserted between the second heat insulating layer and the battery.

[0030] The battery safety evaluation apparatus of the present invention further includes a first fixing means for fixing the upper jig and the lower jig to each other, and a second fixing means for fixing the lower jig and the mounting plate to each other.

[0031] The embodiments of the present invention will be described in detail below with reference to the attached drawings. In this process, the size and shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, terms specifically defined in consideration of the configuration and operation of the present invention may change depending on the intent or convention of the user or operator. The definitions of such terms should be based on the overall content of this specification.

[0032] In describing the present invention, it should be noted that the directions or positional relationships indicated by terms such as "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," "outside," "one side," and "other side" are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the product of the present invention is typically arranged during use. They are merely for the purpose of describing and briefly explaining the present invention, and do not imply or suggest that the displayed device or element must necessarily be configured or operated in a specific direction, and should not be understood as limiting the present invention.

[0033] Figure 1 is a cross-sectional view showing the battery safety evaluation device of the present invention. Figure 2 is a plan view showing the positional relationship between the temperature sensor unit 100 and the battery 11. Figure 3 is a cross-sectional view showing the chamber unit 300. Figure 4 is a perspective view showing an embodiment in which the temperature sensor unit 100 is coupled to the mounting plate 200. Figure 5 is a perspective view showing an embodiment in which the battery 11 is fixed to the mounting plate 200.

[0034] The battery safety evaluation device of the present invention will be described in detail below with reference to Figures 1 to 5. In Figures 1 to 5, the y-axis direction is the first direction, the x-axis direction is the second direction, and the z-axis direction is also the vertical direction. The vertical direction, which is the z-axis direction, is also the direction of gravity. For example, gravity acts so that the bottom surface of the battery 11 is in close contact with the upper surface of the mounting plate 200.

[0035] As shown in Figure 1, the battery safety evaluation device of the present invention includes a stationary plate 200 on which a battery 11 is fixed to the upper surface, a chamber section 300 in which a battery housing space 311 for housing the stationary plate 200 is formed, a temperature sensor section 100 provided in the battery housing space 311, and a temperature analysis section 400 that receives a temperature measurement signal from the temperature sensor section 100 at regular intervals. The temperature sensor section 100 is provided in multiple locations, and the multiple temperature sensor sections 100 are provided at a certain distance apart from each other within the battery housing space 311.

[0036] The battery safety evaluation device of the present invention arranges multiple temperature sensor units 100 around the battery 11 in a sealed chamber 300, collects temperature measurements from the arranged temperature sensor units 100 at regular intervals, and can calculate thermal mapping data as time-series data showing the conditions under which the battery 11 is damaged due to explosion, leakage, etc.

[0037] In other words, by analyzing heat dissipation and transfer at different locations of the battery 11, it is possible to perform a safety analysis on the local location of the battery 11.

[0038] The temperature analysis unit 400 receives temperature measurement values ​​output from the temperature sensor unit 100. The temperature analysis unit 400 can store location information and identification codes for each of the multiple temperature sensor units 100. The temperature measurement values ​​transmitted from the multiple temperature sensor units 100 can be matched with the identification codes corresponding to each of the multiple temperature sensor units 100 and stored.

[0039] The temperature analysis unit 400 receives temperature measurement values ​​from the temperature sensor unit 100 at regular intervals and can calculate temperature analysis data using time-series data.

[0040] The temperature analysis unit 400 also functions as a computing device. The temperature analysis unit 400 is connected to a display device and can output temperature analysis data to the display device.

[0041] The temperature analysis unit 400 is located outside the chamber 300, and a feedthrough 321 may be provided in the wall of the chamber 300 for electrical connection with the charge / discharge cable 410, heater, etc., including the temperature sensor unit 100 inside the chamber 300. The temperature analysis unit 400 can control the charge / discharge module, heater, etc., to forcibly impose conditions such as explosion or damage on the battery 11.

[0042] The mounting plate 200 has a constant width in a first direction perpendicular to the vertical direction and is plate-shaped, extending in the vertical direction and in a second direction perpendicular to the first direction. The battery 11 is mounted on the upper surface of the mounting plate 200. The battery 11 may be fixed in direct contact with the mounting plate 200, or it may be fixed to the mounting plate 200 through an upper jig 220 and a lower jig 210, which will be described later.

[0043] In the battery safety evaluation device of the present invention, the battery 11 to be analyzed is, for example, a pouch-type battery 11. Specifically, it is a battery 11 that includes planar electrodes (negative electrode, positive electrode) perpendicular to the vertical direction. More specifically, the electrodes may be rectangular in shape, with the length of the sides in the second direction being longer than the length of the sides in the first direction.

[0044] As shown in Figure 2, when a pair of imaginary straight lines extending in the second direction with the battery 11 in between are considered to be the first imaginary line l1 and the second imaginary line l2, the plurality of temperature sensor units 100 are arranged such that at least one is arranged on each of the first imaginary line l1 and the second imaginary line l2. Alternatively, 2 to 10 temperature sensor units 100 may be arranged on each of the first imaginary line l1 and the second imaginary line l2. For example, 3 or 7 temperature sensor units 100 may be arranged on each of the first imaginary line l1 and the second imaginary line l2. The number of temperature sensor units 100 arranged on each of the first imaginary line l1 and the second imaginary line l2 is determined by considering the specifications, materials, and structure of the battery 11, or the conditions of heat insulation, explosion protection, etc. of the structure to which the battery 11 is applied and installed.

[0045] The distance between the first virtual line l1 and the second virtual line l2 is also 110-150% of the length of the battery 11 in the first direction. For example, the distance between the first virtual line l1 and the second virtual line l2 can be set to 240-360 mm. The distance between the first virtual line l1 and the second virtual line l2 can be set to approximately 300 mm. The battery stability evaluation method of the present invention also involves real-time monitoring of the temperature around the battery 11 in the event of an explosion or fire and analyzing the thermal behavior. That is, during the analysis, the chamber section 300 can be formed with an explosion-proof structure that can withstand high pressure, high heat, explosion, etc. For example, the chamber section 300 may consist of a cylindrical shape extending in the second direction for explosion-proof purposes. In this case, if the distance between the first virtual line l1 and the second virtual line l2 is excessively large, the volume of the battery housing space 311 in the chamber 300 may become excessively large because the temperature sensor unit 100 is also a rod-shaped unit extending in the vertical direction. If this happens, the space through which the battery-generated gas generated from inside the battery 11 diffuses will become larger, which may make it difficult to analyze the battery-generated gas. Furthermore, if the temperature sensor unit 100 is located excessively close to the battery 11, the temperature sensor unit 100 may be damaged in the event of an explosion or fire of the battery 11, or the temperature sensor unit 100 itself may affect the airflow around the battery 11. Therefore, the distance between the first virtual line l1 and the second virtual line l2 is also 110-150% of the length of the battery 11 in the first direction.

[0046] As shown in Figure 2, when the pair of imaginary straight lines extending in the first direction with the battery 11 in between are the third imaginary line l3 and the fourth imaginary line l4, the multiple temperature sensor units 100 are also positioned at the intersection points (P1) of the third imaginary line l3 and the first imaginary line l1, the intersection point (P2) of the third imaginary line l3 and the second imaginary line l2, the intersection point (P3) of the fourth imaginary line l4 and the first imaginary line l1, and the intersection point (P4) of the fourth imaginary line l4 and the second imaginary line l2. The distance between the third imaginary line l3 and the fourth imaginary line l4 is 110-150% of the length of the battery 11 in the second direction. For example, the distance between the third imaginary line l3 and the fourth imaginary line l4 can be formed to be 640-960 mm. For example, the distance between the third imaginary line l3 and the fourth imaginary line l4 can be formed to be approximately 800 mm.

[0047] When a pair of imaginary straight lines located between one end and the other end of the battery 11 and extending in the first direction are defined as the fifth imaginary line l5, the plurality of temperature sensor units 100 are further arranged at the intersection point (P5) of the fifth imaginary line l5 and the first imaginary line l1, and at the intersection point (P6) of the fifth imaginary line l5 and the second imaginary line l2.

[0048] At the midpoint between the first virtual line l1 and the second virtual line l2, a sixth virtual line (not shown), which is a straight line extending in the second direction, can be located, and the temperature sensor unit 100 can be located at the intersection of the sixth virtual line and the third virtual line l3, and at the intersection of the sixth virtual line and the fourth virtual line l4.

[0049] When the battery 11 is formed to be very long in the long axis (second direction), multiple fifth virtual lines l5 may be provided. For example, five fifth virtual lines l5 may be formed, and a total of 16 temperature sensor units 100 may be provided. In the battery safety evaluation device of the present invention, one temperature sensor unit 100 has three measurement points, as will be described later. Therefore, in the battery housing space 311 of the battery safety evaluation device of the present invention, temperature can be measured at 48 points, and temperature measurement values ​​can be provided as time-series data (temperature-time graph) for each of the 48 points.

[0050] As shown in Figures 1 and 3, the temperature sensor unit 100 is a rod-shaped device extending in the vertical direction. The temperature sensor unit 100 is also a high-heat-resistant thermocouple (TC). One temperature sensor unit 100 may include multiple temperature measurement points.

[0051] Specifically, the temperature sensor unit 100 includes a first measurement point (t) and a second measurement point (c), wherein the first measurement point (t) is located at a higher position than the mounting plate 200, and the second measurement point (c) is located at a lower position than the mounting plate 200. More specifically, the first measurement point (t) is located at an even higher position than the upper surface of the battery 11, and the second measurement point (c) is located at an even lower position than the lower surface of the battery 11.

[0052] The temperature sensor unit 100 further includes a third measurement point (m) located between the first measurement point (t) and the second measurement point (c), wherein the third measurement point (m) is located at a higher position than the mounting plate 200. More specifically, the third measurement point (m) is formed at a position facing the side of the battery 11.

[0053] Therefore, each of the multiple temperature sensor units 100 has three temperature measurement points. For example, if six temperature sensor units 100 are provided, the temperature analysis unit 400 can output temperature measurement data for a total of 18 points. For example, a graph of 18 temperature intervals can be output from the temperature analysis unit 400.

[0054] As shown in Figures 1 and 3, the chamber portion 300 includes a body portion 310 with one end in the second direction open to form an opening 312, and a battery housing space 311 formed inside, and a door portion 320 that covers the opening 312 and is connected to the body portion 310. The one end of the mounting plate 200 in the second direction is connected to the surface of the door portion 320 facing the opening 312, and the other end of the mounting plate 200 in the second direction is inserted into the battery housing space 311 through the opening 312.

[0055] The door section 320 slides in a second direction and connects to or separates from the body section 310 while moving linearly.

[0056] When the door section 320 slides toward the body section 310, the mounting plate 200 moves with the door section 320 and is inserted into the battery housing space 311 through the opening 312. When the door section 320 slides toward the body section 310, the mounting plate 200 moves with the door section 320 and is ejected from the battery housing space 311.

[0057] The body section 310 also serves as an explosion-proof chamber. The body section 310 has an opening 312 formed at one end in the second direction and is cylindrical in shape extending in the second direction. The body section 310 is connected to a relief valve 313 for releasing the high pressure in the battery housing space 311 and a gas transfer pipe 315 for transmitting the gas diffused in the battery housing space 311 to an external gas collection tube or gas analyzer.

[0058] In one embodiment, as shown in Figures 1 and 3, the upper ends of the plurality of temperature sensor units 100 are fixed to the ceiling surface of the chamber unit 300, and the distance between the first virtual line l1 and the second virtual line l2 is even longer than the length of the mounting plate 200 in the first direction. That is, the plurality of temperature sensor units 100 are arranged and fixed in two rows (first virtual line l1 and second virtual line l2) parallel to each other on the body unit 310, and the mounting plate 200 is inserted between the two rows formed by the first virtual line l1 and the second virtual line l2 when it is inserted into the battery housing space 311.

[0059] The door section 320 may be hemispherical or disc-shaped. A mounting plate 200 is fixed to the side of the door section 320 (the side facing the opening 312 of the body section 310). Multiple feedthroughs 321 may be provided in the door section 320.

[0060] In another embodiment, as shown in Figure 4, the plurality of temperature sensor units 100 are fixed to the mounting plate 200 with the units passing through the mounting plate 200, and the distance between the first virtual line l1 and the second virtual line l2 is even shorter than the length of the mounting plate 200 in the first direction and even longer than the length of the battery 11 in the first direction. In other words, the plurality of temperature sensor units 100 also move together with the door unit 320. In this case, the door unit 320 is also provided with a feedthrough 321 for connecting the plurality of temperature sensor units 100 and the temperature analysis unit 400 with wires.

[0061] The mounting plate 200 may have ventilation holes 250 for airflow in the vertical direction. For example, the ventilation holes 250 may be elongated holes extending in a second direction.

[0062] As shown in Figure 5, the battery safety evaluation device of the present invention further includes a lower jig 210 whose bottom surface is fixed to the upper surface of the stationary plate 200, a first heat insulating layer 230 laminated between the battery 11 and the lower jig 210, a second heat insulating layer 240 laminated on the upper surface of the battery 11, an upper jig 220 that pressurizes the upper surface of the battery 11 with the second heat insulating layer 240 in between, a bottom surface temperature measuring sensor 110 inserted between the first heat insulating layer 230 and the battery 11, and a top surface temperature measuring sensor 120 inserted between the second heat insulating layer 240 and the battery 11.

[0063] The upper jig 220 and lower jig 210 prevent the battery 11 from detaching from its fixed position, and allow the top surface temperature measuring sensor 120 and bottom surface temperature measuring sensor 110 to be in close contact with the battery 11 so that the temperature of the battery 11 itself can be measured.

[0064] The upper jig 220 and lower jig 210 are also made of aluminum.

[0065] The top surface temperature measuring sensor 120 and the bottom surface temperature measuring sensor 110 are also rod-shaped thermocouples.

[0066] Temperature sensor insertion grooves are formed on the upper surface of the first insulation layer 230 and the lower surface of the second insulation layer 240, preventing the first insulation layer 230 and the second insulation layer 240 from lifting off the surface of the battery 11 by the upper surface temperature sensor 120 and the lower surface temperature sensor 110.

[0067] The battery safety evaluation device of the present invention further includes a first fixing means for fixing the upper jig 220 and the lower jig 210 to each other, and a second fixing means for fixing the lower jig 210 and the mounting plate 200 to each other. The first and second fixing means may also be bolts, nuts, etc. for screwing.

[0068] Although embodiments of the present invention have been described above, these are merely illustrative, and those skilled in the art will understand that a wide variety of modifications and equivalent embodiments are possible. Therefore, the true scope of technical protection of the present invention must be determined by the claims. [Industrial applicability]

[0069] The battery safety evaluation device of the present invention is capable of effectively analyzing the real-time temperature distribution caused by gas and flames ejected from a battery located inside a chamber.

[0070] The battery safety evaluation device of the present invention is capable of quantifying the position and temperature of gases and flames released from inside the battery to the outside over time.

[0071] The battery safety evaluation device of the present invention minimizes the number of consumable parts for repeated measurements and maximizes the reproducibility of the analysis. [Explanation of Symbols]

[0072] 11:Battery 100: Temperature sensor unit 110: Bottom surface temperature measurement sensor 120: Top surface temperature measurement sensor 200: Freestanding plate 210: Lower jig 220: Upper jig 230: First insulation layer 240: Second insulation layer 250: Ventilation holes 300: Chamber Department 310: Torso 311: Battery housing space 312: Opening 313: Relief valve 315: Gas transmission tube 320: Door section 321: Feedthrough 400: Temperature analysis department 410: Charging and discharging cable l1: First virtual line l2: Second virtual line l3: Third virtual line l4: 4th virtual line l5: Fifth virtual line t: 1st measurement point c: Second measurement point m: 3rd measurement point

Claims

1. A mounting plate on the top surface secures the battery, A chamber section having a battery housing space formed inside for housing the aforementioned mounting plate, A temperature sensor unit is provided in the aforementioned battery housing space, The system includes a temperature analysis unit to which a temperature measurement signal is input at regular intervals from the temperature sensor unit, Multiple temperature sensor units are provided. Multiple temperature sensor units are provided within the battery housing space at a certain distance apart from each other. The aforementioned mounting plate has a constant width in a first direction perpendicular to the vertical direction and is plate-shaped, extending in the vertical direction and in a second direction perpendicular to the first direction. When a pair of imaginary straight lines extending in the second direction with the battery in between are defined as the first imaginary line and the second imaginary line, The plurality of temperature sensor units are arranged in groups of at least two on each of the first virtual line and the second virtual line. When a pair of imaginary straight lines extending in the first direction with the battery in between are designated as the third imaginary line and the fourth imaginary line, A battery safety evaluation device in which the plurality of temperature sensor units are arranged at the intersections of the third virtual line and the first virtual line, the intersection of the third virtual line and the second virtual line, the intersection of the fourth virtual line and the first virtual line, and the intersection of the fourth virtual line and the second virtual line.

2. When a pair of imaginary straight lines located between one end and the other end of the battery and extending in the first direction are defined as the fifth imaginary line, The battery safety evaluation device according to claim 1, wherein the plurality of temperature sensor units are further arranged at the intersections of the fifth virtual line and the first virtual line, and at the intersections of the fifth virtual line and the second virtual line.

3. The battery safety evaluation device according to claim 2, wherein a plurality of the fifth virtual lines are provided.

4. The battery safety evaluation device according to any one of claims 1 to 3, wherein the temperature sensor portion is a rod-shaped object extending in the vertical direction.

5. A stationary plate on which a battery is fixed to the upper surface, A chamber section having a battery housing space formed inside for housing the aforementioned mounting plate, A temperature sensor unit is provided in the aforementioned battery housing space, The system includes a temperature analysis unit to which a temperature measurement signal is input at regular intervals from the temperature sensor unit, Multiple temperature sensor units are provided. Multiple temperature sensor units are provided within the battery housing space at a certain distance apart from each other. The aforementioned mounting plate has a constant width in a first direction perpendicular to the vertical direction and is plate-shaped, extending in the vertical direction and in a second direction perpendicular to the first direction. When a pair of imaginary straight lines extending in the second direction with the battery in between are defined as the first imaginary line and the second imaginary line, The plurality of temperature sensor units are arranged in such a way that at least one is arranged on each of the first virtual line and the second virtual line. The temperature sensor unit consists of a rod-shaped structure extending in the vertical direction. The temperature sensor unit includes a first measurement point and a second measurement point. The first measurement point is located at a higher position than the mounting plate. The second measurement point is a battery safety evaluation device located at a lower position than the mounting plate.

6. The temperature sensor unit further includes a third measurement point located between the first measurement point and the second measurement point, The battery safety evaluation apparatus according to claim 5, wherein the third measurement point is located at a position even higher than the mounting plate.

7. A stationary plate on which a battery is fixed to the upper surface, A chamber section having a battery housing space formed inside for housing the aforementioned mounting plate, A temperature sensor unit is provided in the aforementioned battery housing space, The system includes a temperature analysis unit to which a temperature measurement signal is input at regular intervals from the temperature sensor unit, Multiple temperature sensor units are provided. Multiple temperature sensor units are provided within the battery housing space at a certain distance apart from each other. The aforementioned mounting plate has a constant width in a first direction perpendicular to the vertical direction and is plate-shaped, extending in the vertical direction and in a second direction perpendicular to the first direction. When a pair of imaginary straight lines extending in the second direction with the battery in between are defined as the first imaginary line and the second imaginary line, The plurality of temperature sensor units are arranged in such a way that at least one is arranged on each of the first virtual line and the second virtual line. The temperature sensor unit consists of a rod-shaped structure extending in the vertical direction. The aforementioned chamber section is A body portion having one end in the second direction open to form an opening, and having the battery housing space formed inside, It includes a door portion that covers the opening and is connected to the body portion, One end of the mounting plate in the second direction is connected to the surface of the door portion facing the opening. The other end of the aforementioned mounting plate in the second direction is inserted into the battery housing space through the opening, thereby providing a battery safety evaluation device.

8. The upper ends of the plurality of temperature sensor units are fixed to the ceiling surface of the chamber unit. The battery safety evaluation apparatus according to claim 7, wherein the distance between the first virtual line and the second virtual line is further longer than the length of the mounting plate in the first direction.

9. The plurality of temperature sensor units are fixed to the mounting plate in a manner that they pass through the mounting plate. The battery safety evaluation device according to claim 7, wherein the distance between the first virtual line and the second virtual line is shorter than the length of the mounting plate in the first direction and longer than the length of the battery in the first direction.

10. The battery safety evaluation device according to claim 9, wherein the door section is provided with a feedthrough for connecting the plurality of temperature sensor sections and the temperature analysis section by wire.

11. A stationary plate on which a battery is fixed to the top surface, A chamber section having a battery housing space formed inside for housing the aforementioned mounting plate, A temperature sensor unit is provided in the aforementioned battery housing space, The system includes a temperature analysis unit to which a temperature measurement signal is input at regular intervals from the temperature sensor unit, Multiple temperature sensor units are provided. Multiple temperature sensor units are provided within the battery housing space at a certain distance apart from each other. The lower jig, whose bottom surface is fixed to the upper surface of the aforementioned mounting plate, A first heat insulating layer is laminated between the battery and the lower jig, A second heat insulating layer is stacked on the upper surface of the aforementioned battery, An upper jig that pressurizes the upper surface of the battery with the second insulating layer in between, A bottom surface temperature measuring sensor is inserted between the first insulation layer and the battery, An upper surface temperature measuring sensor is inserted between the second heat insulating layer and the battery, A battery safety evaluation device, further including the above.

12. A first fixing means for fixing the upper jig and the lower jig to each other, A second fixing means for fixing the lower jig and the mounting plate to each other, The battery safety evaluation device according to claim 11, further comprising:

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