Battery safety evaluation equipment

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 dated November 9, 2022, and all contents disclosed in the documents of the Korean Patent Application are incorporated herein by reference.

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

[0003] During battery experiments, where there is a risk of fire and explosion, a sealed chamber is used to ensure the safety of researchers and to capture and analyze the gas generated by the battery. At this time, the composition and amount of gas generated by the battery changes in real time depending on the kinetic characteristics (SOC, battery temperature, evaluated atmospheric environmental conditions, etc.). Furthermore, if the composition and amount of gas generated changes, the physical properties of the gas, such as the temperature and density, also change.

[0004] When an excessive amount of gas is generated inside a battery or when the battery ignites, it is very important to understand the location and temperature distribution of the gas and flames that are ejected outside the battery when designing the battery itself and a device that includes a battery.

[0005] Conventionally, thermal imaging cameras have been used to measure the temperature distribution of gases and flames generated and erupted from cells.

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

[0007] When installing a thermal imaging camera outside a chamber for battery analysis, the chamber is required to have a window made of a material that allows infrared rays to pass through. However, explosion-proof chambers have limitations on the window specifications, which limits the measurement scale.

[0008] Therefore, there is a need for an effective technique that can analyze real-time temperature distribution due to gas and flame emanating from a cell located inside a chamber. Summary of the Invention [Problem to be solved by the invention]

[0009] 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 its temperature over time.

[0010] The technical problems that the present invention aims to solve are not limited to the above-mentioned technical problems, and 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 mounting plate to which a battery is fixed on an upper surface, a chamber portion in which a battery accommodating space is formed for accommodating the mounting plate, a temperature sensor portion provided in the battery accommodating space, and a temperature analysis portion to which a temperature measurement signal is input from the temperature sensor portion at regular intervals, and the temperature sensor portion is provided in plurality, and the plurality of temperature sensor portions are provided at a predetermined distance from each other within the battery accommodating space. Effect of the Invention

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

[0013] The battery safety evaluation device of the present invention is capable of quantifying the location and temperature of gas and flames that are released from the inside of a battery to the outside over time.

[0014] The battery safety evaluation device of the present invention minimizes parts that are consumed during repeated measurements, thereby maximizing reproducibility of analysis. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a cross-sectional view showing a battery safety evaluation device of the present invention. [Diagram 2] FIG. 4 is a plan view showing the positional relationship between a temperature sensor unit and a battery. [Diagram 3] FIG. 4 is a cross-sectional view showing a chamber portion. [Figure 4] FIG. 13 is a perspective view showing an embodiment in which the temperature sensor portion is coupled to a mounting plate. [Diagram 5] FIG. 13 is a perspective view showing an embodiment in which the battery is fixed to a stationary plate. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The battery safety evaluation device of the present invention includes a mounting plate to which a battery is fixed on an upper surface, a chamber portion in which a battery accommodating space is formed for accommodating the mounting plate, a temperature sensor portion provided in the battery accommodating space, and a temperature analysis portion to which a temperature measurement signal is input from the temperature sensor portion at regular intervals, and the temperature sensor portion is provided in plurality, and the plurality of temperature sensor portions are provided at a predetermined distance from each other within the battery accommodating space.

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

[0018] In the battery safety evaluation device of the present invention, when a pair of imaginary straight lines extending in the second direction across the battery are defined as a first imaginary line and a second imaginary line, the multiple temperature sensor units are arranged with at least one on each of the first imaginary line and the second imaginary line.

[0019] In the battery safety evaluation device of the present invention, when a pair of imaginary straight lines extending in the first direction across the battery are defined as a third virtual line and a fourth virtual line, the multiple temperature sensor units are arranged at 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 imaginary straight lines located between one end and the other end of the battery and extending in the first direction is defined as fifth imaginary lines, the multiple temperature sensor units are further arranged at the intersections of the fifth imaginary line and the first imaginary line, and the intersections of the fifth imaginary line and the second imaginary line.

[0021] In the battery safety evaluation device of the present invention, the fifth virtual line may be provided in plurality.

[0022] In the battery safety evaluation device of the present invention, the temperature sensor portion is in the form 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 being located at a higher position than the mounting plate, and the second measurement point being located at a lower position than the mounting 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, and the third measurement point is located at a position even higher than the mounting plate.

[0025] In the battery safety evaluation device of the present invention, the chamber portion includes a body portion having one end in the second direction that is open to form an opening and in which the battery accommodating space is formed, and a door portion that covers the opening and is connected to the body portion, and one end of the mounting plate in the second direction is connected to a 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 accommodating space through the opening.

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

[0027] In the battery safety evaluation device of the present invention, the multiple 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] In the battery safety evaluation device of the present invention, the door portion is provided with a feedthrough for connecting the plurality of temperature sensor portions and the temperature analysis portion by wires.

[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 mounting plate, a first insulating layer laminated between the battery and the lower jig, a second insulating layer laminated on the upper surface of the battery, an upper jig that pressurizes the upper surface of the battery by sandwiching the second insulating layer, a bottom temperature measuring sensor inserted between the first insulating layer and the battery, and a top temperature measuring sensor inserted between the second insulating layer and the battery.

[0030] The battery safety evaluation device 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] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the size and shape of 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 vary depending on the intention or practice of a user or operator. The definition 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 orientations or positional relationships indicated by the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "one side," "other side," and the like are based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships typically arranged when the product of the present invention is used, and are merely for the purpose of describing and briefly explaining the present invention, and do not present or imply that the displayed devices or elements must necessarily have a specific orientation, be configured or operated in a specific orientation, and should not be understood as limiting the present invention.

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

[0035] As shown in FIG. 1, the battery safety evaluation device of the present invention includes a mounting plate 200 to which a battery 11 is fixed on the upper surface, a chamber section 300 in which a battery accommodating space 311 for accommodating the mounting plate 200 is formed, a temperature sensor section 100 provided in the battery accommodating space 311, and a temperature analysis section 400 to which a temperature measurement signal is input from the temperature sensor section 100 at regular intervals, and the temperature sensor section 100 is provided in plurality, and the plurality of temperature sensor sections 100 are provided at a predetermined distance from each other within the battery accommodating space 311.

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

[0037] That is, by analyzing heat emission and movement for each position of the battery 11, it is possible to perform a safety analysis for the local position of the battery 11.

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

[0039] The temperature analysis unit 400 receives the temperature measurement value from the temperature sensor unit 100 at a fixed time interval and calculates temperature analysis data as time series data.

[0040] The temperature analysis unit 400 is also 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 unit 300, and a feedthrough 321 may be provided on a wall of the chamber unit 300 for electrical connection with a charge / discharge cable 410, a heater, etc., including the temperature sensor unit 100 inside the chamber unit 300. The temperature analysis unit 400 may forcibly apply conditions such as explosion or damage to the battery 11 by controlling the charge / discharge module, the heater, etc.

[0042] The mounting plate 200 has a certain width in a first direction perpendicular to the up-down direction and is in the shape of a plate extending in a second direction perpendicular to the up-down direction and the first direction. The battery 11 is mounted on the upper surface of the mounting plate 200. The battery 11 may be fixed to the mounting plate 200 by directly contacting it, or 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 may be, for example, a pouch-type battery 11. Specifically, the battery 11 may include planar electrodes (negative electrode, positive electrode) perpendicular to the up-down direction. More specifically, the electrodes may be rectangular in shape with a side in a second direction longer than that in a first direction.

[0044] As shown in FIG. 2, when a pair of imaginary straight lines extending in the second direction across the battery 11 are defined as a first imaginary line l1 and a second imaginary line l2, the temperature sensor units 100 are arranged at least one on each of the first imaginary line l1 and the second imaginary line l2. Two to ten temperature sensor units 100 may be arranged on each of the first imaginary line l1 and the second imaginary line l2. For example, the temperature sensor units 100 may be arranged such that three or seven temperature sensor units 100 are 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 in consideration of the specifications, materials, and structure of the battery 11, or the heat insulation and explosion-proofing 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 110 to 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 may be 240 to 360 mm. The distance between the first virtual line l1 and the second virtual line l2 may be about 300 mm. The battery stability evaluation method of the present invention also analyzes the behavior of heat by grasping the temperature around the battery 11 in real time in the case of explosion or fire of the battery 11. That is, the chamber unit 300 may be formed with an explosion-proof structure that can withstand high pressure, high heat, explosion, etc. during analysis. For example, the chamber unit 300 may be formed in a cylindrical shape extending in the second direction for the explosion-proof structure. In this case, if the distance between the first virtual line l1 and the second virtual line l2 is too far, the volume of the battery accommodating space 311 of the chamber 300 may be excessively enlarged because the temperature sensor unit 100 is also formed in a rod shape extending in the vertical direction. In this case, the space into which the gas generated from the battery 11 is diffused becomes large, which may cause difficulties in analyzing the gas generated from the battery. Furthermore, if the temperature sensor unit 100 is located too close to the battery 11, the temperature sensor unit 100 may be damaged or the temperature sensor unit 100 itself may affect the airflow around the battery 11 when the battery 11 explodes or catches fire. Therefore, the distance between the first virtual line l1 and the second virtual line l2 is 110 to 150% of the length of the battery 11 in the first direction.

[0046] As shown in FIG. 2, when a pair of imaginary straight lines extending in the first direction across the battery 11 are a third imaginary line l3 and a fourth imaginary line l4, the temperature sensor units 100 are disposed at the intersection (P1) of the third imaginary line l3 and the first imaginary line l1, the intersection (P2) of the third imaginary line l3 and the second imaginary line l2, the intersection (P3) of the fourth imaginary line l4 and the first imaginary line l1, and the intersection (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 to 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 may be formed to be 640 to 960 mm. For example, the distance between the third imaginary line l3 and the fourth imaginary line l4 may be formed to be about 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 is defined as a fifth imaginary line l5, the multiple temperature sensor units 100 are further arranged at the intersection (P5) of the fifth imaginary line l5 and the first imaginary line l1, and the intersection (P6) of the fifth imaginary line l5 and the second imaginary line l2.

[0048] A sixth virtual line (not shown), which is a straight line extending in the second direction, may be located in the center between the first virtual line l1 and the second virtual line l2, and the temperature sensor unit 100 may be located at each of the intersections of the sixth virtual line and the third virtual line l3 and the intersections 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), the fifth virtual line 15 may be provided in a plurality of numbers. For example, five fifth virtual lines 15 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 described below. Therefore, in the battery accommodating space 311 of the battery safety evaluation device of the present invention, the temperature is measured at 48 points, and the temperature measurement value can be provided as time series data (temperature-time graph) for each of the 48 points.

[0050] 1 and 3, the temperature sensor unit 100 has a rod shape extending in the vertical direction. The temperature sensor unit 100 is also a highly heat-resistant thermocouple (TC). One temperature sensor unit 100 may include a plurality of temperature measurement points.

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

[0053] Therefore, each of the temperature sensor units 100 has three temperature measurement points, and for example, when 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 temperatures over time is output from the temperature analysis unit 400.

[0054] As shown in Figures 1 and 3, the chamber portion 300 includes a body portion 310 having one end in the second direction opened to form an opening 312 and having the battery accommodating space 311 formed therein, and a door portion 320 covering the opening 312 and coupled to the body portion 310, and one end of the mounting plate 200 in the second direction is coupled to a 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 accommodating space 311 through the opening 312.

[0055] The door part 320 is coupled to or separated from the body part 310 while sliding in the second direction and moving linearly.

[0056] When the door part 320 slides to approach the body part 310, the mounting plate 200 moves together with the door part 320 and is inserted into the battery accommodating space 311 through the opening 312. When the door part 320 slides to separate from the body part 310, the mounting plate 200 moves together with the door part 320 and is ejected from the battery accommodating space 311.

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

[0058] 1 and 3, the upper ends of the 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 longer than the length of the mounting plate 200 in the first direction. That is, the temperature sensor units 100 are arranged in parallel in two rows (the first virtual line l1 and the second virtual line l2) and fixed to 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 receiving space 311.

[0059] The door part 320 may be in the shape of a hemisphere or a disk. The mounting plate 200 is fixed to a side surface of the door part 320 (a surface facing the opening 312 of the body part 310). The door part 320 may be provided with a plurality of feedthroughs 321.

[0060] 4, the plurality of temperature sensor units 100 are fixed to the mounting plate 200 while penetrating the mounting plate 200, and the distance between the first virtual line l1 and the second virtual line l2 is shorter than the length of the mounting plate 200 in the first direction and longer than the length of the battery 11 in the first direction. That is, the plurality of temperature sensor units 100 also move together with the door unit 320. In this case, the door unit 320 is provided with a feedthrough 321 for connecting the plurality of temperature sensor units 100 and the temperature analysis unit 400 by wire.

[0061] A ventilation hole 250 for air flow in the vertical direction may be formed in the mounting plate 200. For example, the ventilation hole 250 may be a long hole extending in the second direction.

[0062] As shown in FIG. 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 mounting plate 200, a first insulating layer 230 stacked between the battery 11 and the lower jig 210, a second insulating layer 240 stacked on the upper surface of the battery 11, an upper jig 220 that presses the upper surface of the battery 11 by sandwiching the second insulating layer 240, a bottom temperature measuring sensor 110 inserted between the first insulating layer 230 and the battery 11, and a top temperature measuring sensor 120 inserted between the second insulating layer 240 and the battery 11.

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

[0064] The top jig 220 and the bottom jig 210 are also Al plates.

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

[0066] A temperature measuring sensor insertion groove is formed on the upper surface of the first insulating layer 230 and the bottom surface of the second insulating layer 240, thereby preventing the first insulating layer 230 and the second insulating layer 240 from floating up from the surface of the battery 11 due to the upper surface temperature measuring sensor 120 and the bottom surface temperature measuring 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 fixing means and the second fixing means may be bolts, nuts, etc. for screwing.

[0068] Although the embodiment of the present invention has been described above, it is merely an example, and a person skilled in the art will understand that various modifications and equivalent embodiments are possible. Therefore, the true technical scope of the present invention should be determined by the claims. [Industrial Applicability]

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

[0070] The battery safety evaluation device of the present invention is capable of quantifying the location and temperature of gas and flames that are released from the inside of a battery to the outside over time.

[0071] The battery safety evaluation device of the present invention minimizes parts that are consumed during repeated measurements, thereby maximizing reproducibility of analysis. [Explanation of symbols]

[0072] 11:Battery 100: Temperature sensor part 110: Bottom temperature sensor 120: Top surface temperature measurement sensor 200: Standing plate 210: Lower jig 220: Upper jig 230: First insulation layer 240: Second insulation layer 250: Ventilation hole 300: Chamber section 310: Body 311: Battery compartment 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: 3rd virtual line l4: 4th virtual line l5: 5th virtual line t: 1st measurement point c: Second measurement point m: 3rd measurement point

Claims

1. a mounting plate on the upper surface of which the battery is fixed; a chamber portion in which a battery accommodating space for accommodating the mounting plate is formed; A temperature sensor unit provided in the battery accommodating space; a temperature analysis unit to which a temperature measurement signal is input from the temperature sensor unit at a constant time interval; The temperature sensor unit is provided in plurality, The temperature sensor units are provided at a fixed distance from each other within the battery accommodating space.

2. The battery safety evaluation device according to claim 1 , wherein the stationary plate is in the form of a plate having a constant width in a first direction perpendicular to the up-down direction and extending in a second direction perpendicular to the up-down direction and the first direction.

3. When a pair of imaginary straight lines extending in the second direction with the battery therebetween are defined as a first imaginary line and a second imaginary line, The battery safety evaluation device according to claim 2 , wherein the plurality of temperature sensor units are arranged such that at least one is on each of the first virtual line and the second virtual line.

4. When a pair of imaginary straight lines extending in the first direction with the battery therebetween are defined as a third imaginary line and a fourth imaginary line, 4. The battery safety evaluation device of claim 3, wherein the plurality of temperature sensor units are arranged at an intersection of the third virtual line and the first virtual line, an intersection of the third virtual line and the second virtual line, an intersection of the fourth virtual line and the first virtual line, and an intersection of the fourth virtual line and the second virtual line.

5. 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 fifth imaginary lines, The battery safety evaluation device according to claim 4 , wherein the plurality of temperature sensor units are further disposed at intersections of the fifth virtual line and the first virtual line and at intersections of the fifth virtual line and the second virtual line.

6. The battery safety evaluation device according to claim 5 , wherein a plurality of the fifth virtual lines are provided.

7. The battery safety evaluation device according to claim 3 , wherein the temperature sensor portion has a rod shape extending in a vertical direction.

8. 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 stationary plate, The battery safety evaluation device according to claim 7 , wherein the second measurement point is located at a position lower than the mounting plate.

9. 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 device according to claim 8 , wherein the third measurement point is located at a position higher than the mounting plate.

10. The chamber section includes: a body portion having an end portion in the second direction that is open to form an opening, the body portion having the battery accommodating space formed therein; a door portion covering the opening and coupled to the body portion; One end of the stationary plate in the second direction is coupled to a surface of the door portion facing the opening, The battery safety evaluation device according to claim 7 , wherein the other end of the mounting plate in the second direction is inserted into the battery accommodating space through the opening.

11. The upper ends of the plurality of temperature sensor units are fixed to a ceiling surface of the chamber unit, The battery safety evaluation device according to claim 10 , wherein a distance between the first virtual line and the second virtual line is longer than a length of the mounting plate in the first direction.

12. the plurality of temperature sensor units are fixed to the mounting plate in a state of penetrating the mounting plate, The battery safety evaluation device of claim 10 , wherein a distance between the first virtual line and the second virtual line is shorter than a length of the mounting plate in the first direction and longer than a length of the battery in the first direction.

13. The battery safety evaluation device according to claim 12 , wherein the door portion is provided with a feedthrough for connecting the plurality of temperature sensor portions and the temperature analysis portion by wires.

14. a lower jig whose bottom surface is fixed to the upper surface of the stationary plate; A first insulating layer laminated between the battery and the lower jig; A second insulating layer laminated on an upper surface of the battery; an upper jig that presses an upper surface of the battery by sandwiching the second insulating layer; A bottom temperature measuring sensor inserted between the first insulating layer and the battery; a top surface temperature measuring sensor inserted between the second insulating layer and the battery; The battery safety evaluation device according to claim 1 , further comprising:

15. a first fastening means for fastening the upper jig and the lower jig to each other; second fastening means for fastening the lower jig and the stationary plate to each other; The battery safety evaluation device according to claim 14 , further comprising:

Images