Cooling device

Abstract

This application belongs to the field of battery thermal runaway cooling technology, and relates to a cooling device for cooling the thermal runaway front of a battery. The cooling device includes a cooling system, a sample delivery mechanism, and a trigger mechanism. The cooling system includes a cooling box and a liquid storage tank. The cooling box is provided with a cooling cavity, and the liquid storage tank is used to deliver coolant to the cooling cavity; the sample delivery mechanism is used to deliver the battery to the cooling cavity; the sample delivery mechanism is also used to extract the cooled battery from the cooling cavity; and the trigger mechanism is used to trigger the battery in the cooling cavity to undergo thermal runaway. The cooling device of this application can trigger the battery to undergo thermal runaway, and can cool down the thermal runaway front inside the battery, effectively suppressing the spread of thermal runaway inside the battery, obtaining the battery thermal runaway front, providing key information for analyzing the battery thermal runaway reaction, providing a theoretical basis for suppressing the thermal runaway reaction, and laying the foundation for developing more effective thermal runaway suppression strategies.

Description

Technical Field

[0001] The present application relates to the technical field of battery thermal runaway cooling, and in particular to a cooling device. Background Art

[0002] Lithium-ion batteries, due to their high energy density and long cycle life, have been widely used in electric vehicles, energy storage systems, and other fields. However, battery safety issues, particularly thermal runaway, have seriously hindered their large-scale application. Thermal runaway is the core of lithium-ion battery safety issues. When the battery temperature reaches the thermal runaway temperature, it triggers an irreversible chain chemical reaction within the battery, causing the battery temperature to rise rapidly from the thermal runaway temperature to the maximum temperature (approximately 1000°C) in a very short period of time, with a reaction heat release rate of up to 1000°C / s. The smoke, fire, and explosion that accompany the thermal runaway process not only cause serious casualties and economic losses, but also have a huge negative social impact.

[0003] To effectively suppress battery thermal runaway reactions, a deep understanding of their reaction mechanisms and timing is essential. However, battery thermal runaway reactions are characterized by extremely fast reaction rates, complex reactants, and a wide temperature range (approximately 200°C to 1300°C), making their analysis a major challenge in battery safety research. Existing technologies struggle to monitor and analyze high-temperature reactions in real time, resulting in slow progress in research on battery thermal runaway mechanisms and a lack of targeted thermal runaway suppression methods. Summary of the Invention

[0004] Based on this, the present application provides a cooling device that can suppress the spread of thermal runaway inside the battery, cool and obtain the battery thermal runaway front, provide key information for the analysis of the battery thermal runaway reaction, and provide a theoretical basis for suppressing the thermal runaway reaction.

[0005] An embodiment of the present application provides a cooling device for cooling the thermal runaway front of a battery, comprising:

[0006] The cooling system includes a cooling box and a liquid storage tank, wherein the cooling box is provided with a cooling cavity, and the liquid storage tank is used to transport coolant into the cooling cavity;

[0007] A sample delivery mechanism, the sample delivery mechanism is used to deliver the battery into the cooling chamber; the sample delivery mechanism is also used to extract the cooled battery from the cooling chamber;

[0008] A trigger mechanism is used to trigger thermal runaway of the battery in the cooling chamber.

[0009] In one embodiment, the sample delivery mechanism includes:

[0010] A fixing assembly, the fixing assembly being used to fix the battery;

[0011] A first motion module, the first motion module is connected to the fixed component; a first opening connected to the cooling cavity is provided on the cooling box; the first motion module is used to drive the fixed component to move along an axial direction parallel to the first opening, so that the fixed component can enter or leave the cooling cavity through the first opening.

[0012] In one embodiment, the fixing assembly includes a first fixing member and a second fixing member spaced apart and arranged parallel to each other on the first motion module;

[0013] A first limiting portion is provided on a side of the first fixing member close to the second fixing member; a second limiting portion is provided on a side of the second fixing member close to the first fixing member; the first limiting portion and the second limiting portion cooperate to limit the battery so as to fix the battery between the first fixing member and the second fixing member.

[0014] In one embodiment, the first limiting portion includes a first limiting groove, the first limiting groove is arranged along the extension direction of the first fixing member, the first limiting groove is closed at one end close to the cooling box, and is open at one end away from the cooling box;

[0015] The second limiting portion is a second limiting groove, which is arranged along the extension direction of the second fixing member. The second limiting groove is closed at one end close to the cooling box, and is open at one end away from the cooling box.

[0016] The first limiting groove and the second limiting groove cooperate to accommodate and limit two opposite sides of the battery.

[0017] In one embodiment, the sample feeding mechanism further includes a clamping assembly, the clamping assembly including a first clamping piece and a second clamping piece, the first clamping piece and the second clamping piece are arranged opposite to each other and connected to each other, and the first clamping piece and the second clamping piece cooperate to clamp the battery;

[0018] The first limiting portion and the second limiting portion cooperate to limit the clamping assembly.

[0019] In one embodiment, a first through hole is provided on at least one of the first clamping piece and the second clamping piece, and the first through hole is used to expose a portion of the battery; a plurality of first temperature sensors are spaced apart on at least one of the first clamping piece and the second clamping piece, and the first temperature sensors are used to monitor the temperature of the battery.

[0020] In one embodiment, the trigger mechanism includes:

[0021] A thermal runaway trigger, wherein a second opening communicating with the cooling chamber is provided on one side of the cooling box; the thermal runaway trigger is configured to pass through the second opening to induce local heating of the battery, thereby triggering thermal runaway of the battery;

[0022] A second motion module is connected to the thermal runaway trigger, and is used to drive the thermal runaway trigger to move closer to or away from the cooling box.

[0023] In one embodiment, the cooling box includes a first shell and a second shell, the first shell encloses the cooling cavity, and the first shell is provided with a first opening connected to the cooling cavity; the cross-sectional area of ​​the cooling cavity gradually decreases from the side close to the first opening to the side away from the first opening; the second shell is provided on the periphery of the first shell, and an insulation cavity surrounding the cooling cavity is formed between the second shell and the first shell, and the insulation cavity is filled with an insulation layer.

[0024] In one embodiment, the cooling system further includes a liquid inlet pipe, a buffer pipe, a liquid discharge pipe, and a liquid level monitoring pipe;

[0025] The liquid inlet pipe connects the liquid storage tank and the buffer pipe, and a first control valve is provided on the liquid inlet pipe; the buffer pipe is arranged in the heat preservation chamber, and the buffer pipe is communicated with the cooling chamber, and the diameter of the buffer pipe gradually increases from the end close to the liquid inlet pipe to the end close to the cooling chamber;

[0026] The drain pipe is arranged in the heat preservation chamber, one end of the drain pipe is connected to the cooling chamber, the other end of the drain pipe is located outside the cooling box, and the other end of the drain pipe is provided with a second control valve;

[0027] A liquid level monitoring tube is provided in the insulation cavity, and the liquid level monitoring connects the outside world and the cooling cavity; a liquid level sensor, a second temperature sensor and a pressure sensor are provided on the liquid level monitoring tube, and the liquid level sensor is used to monitor the liquid level in the cooling cavity; the second temperature sensor is used to monitor the temperature of the coolant; and the pressure sensor is used to monitor the pressure in the cooling cavity.

[0028] In one embodiment, a control system is further included, which is connected to the cooling system, the sample feeding mechanism and the trigger mechanism, and the control system is used to control the operation of the cooling system, the sample feeding mechanism and the trigger mechanism.

[0029] When the above-mentioned cooling device is used to cool the thermal runaway front of the battery, the coolant is transported to the cooling chamber through the liquid storage tank until the coolant level in the cooling chamber reaches a preset height; the battery is transported to the cooling chamber by the sample delivery mechanism, with part of the battery immersed in the coolant and part of the battery located above the coolant level; the battery located above the coolant level is then triggered to thermal runaway by the trigger mechanism. During the thermal runaway of the battery, the thermal runaway front of the battery advances from the trigger position to the non-thermal runaway position inside the battery, that is, the thermal runaway front continuously advances toward the coolant, and the coolant continuously absorbs the heat of the thermal runaway of the battery, cooling the thermal runaway front of the battery during the movement, completing the cooling of the thermal runaway front of the battery, and then the battery is withdrawn from the cooling chamber by the sample delivery mechanism. That is to say, the cooling device of the present application can trigger thermal runaway of the battery and cool down the thermal runaway front surface inside the battery, thereby effectively suppressing the spread of thermal runaway inside the battery, causing thermal runaway to occur in part of the battery and not in part, obtaining the thermal runaway front surface of the battery, and retaining all products produced in the process of the battery from non-thermal runaway to thermal runaway. These products can be confirmed by material characterization instruments such as scanning electron microscopes, energy spectrometers, transmission electron microscopes, X-ray photoelectron spectrometers, and X-ray diffractometers, thereby providing key information for the analysis of battery thermal runaway reactions, providing a theoretical basis for suppressing thermal runaway reactions, and laying the foundation for the development of more effective thermal runaway suppression strategies. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a battery provided in one embodiment of the present application.

[0031] Figure 2 A schematic structural diagram of a cooling device provided in one embodiment of the present application.

[0032] Figure 3 Another structural schematic diagram of the cooling device provided in one embodiment of the present application.

[0033] Figure 4 A schematic structural diagram of a cooling box in a cooling device provided in one embodiment of the present application.

[0034] Figure 5 This is a structural schematic diagram of the sample feeding mechanism in the cooling device provided in one embodiment of the present application.

[0035] Figure 6 A schematic structural diagram of a trigger mechanism in a cooling device provided in one embodiment of the present application.

[0036] Figure 7 A schematic structural diagram of a first fixing member and a second fixing member of a fixing assembly provided in one embodiment of the present application.

[0037] Figure 8Another structural schematic diagram of the first fixing member and the second fixing member of the fixing assembly provided in one embodiment of the present application.

[0038] Figure 9 for Figure 8 A cross-sectional view of the first fixing member and the second fixing member taken along line AA is shown.

[0039] Figure 10 A schematic diagram of the exploded structure of a clamping assembly provided in one embodiment of the present application.

[0040] Figure 11 This is a schematic structural diagram of a battery after cooling and with the aluminum-plastic film removed according to an embodiment of the present application.

[0041] Figure 12 for Figure 11 The temperature curve of the battery during the cooling process of the thermal runaway front is shown.

[0042] Description of reference numerals:

[0043] 10. Battery; 11. Thermal runaway zone; 12. Normal zone; 13. Thermal runaway front;

[0044] 20. Cooling device; 21. Cooling system; 211. Cooling box; 2111. First shell; 2112. Second shell; 2113. Cooling chamber; 2113a. First cavity; 2113b. Second cavity; 2114. Insulation chamber; 2115. Insulation layer; 2116. First opening; 2117. Second opening; 212. Liquid storage tank; 213. Liquid inlet pipe; 214. Buffer pipe; 215. Liquid discharge pipe; 216. Liquid level monitoring pipe; 22. Sample delivery mechanism; 221. Fixing assembly; 2211. First fixing member; 2211a. First limiting portion; 2211b. First limiting groove; 2212. Second fixing member; 2212a. Second limiting portion; 2212b. Second limiting groove; 22 2. First motion module; 222a, first linear motion component; 2221, first guide member; 2222, first sliding member; 223, first bracket; 224, clamping assembly; 2241, first clamping plate; 2242, second clamping plate; 2243, first through hole; 2244, second through hole; 2245, guide tube; 23. Trigger mechanism; 231, thermal runaway trigger; 232, second motion module; 232a, second linear motion component; 2321, second guide member; 2322, second sliding member; 233, second bracket; 24, first control valve; 25, second control valve; 26, liquid level sensor; 27, second temperature sensor; 28, pressure sensor; 29, control system. DETAILED DESCRIPTION

[0045] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0046] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0047] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0048] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0049] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0051] See Figures 1 to 3 As shown, an embodiment of the present application provides a cooling device 20 for cooling the thermal runaway front 13 of the battery 10, including a cooling system 21, a sample delivery mechanism 22 and a trigger mechanism 23. The cooling system 21 includes a cooling box 211 and a liquid storage tank 212. A cooling cavity 2113 is provided in the cooling box 211. The liquid storage tank 212 is used to deliver coolant to the cooling cavity 2113; the sample delivery mechanism 22 is used to deliver the battery 10 to the cooling cavity 2113; the sample delivery mechanism 22 is also used to extract the cooled battery 10 from the cooling cavity 2113; the trigger mechanism 23 is used to trigger the battery 10 in the cooling cavity 2113 to cause thermal runaway.

[0052] Specifically, the battery 10 can be a long strip-shaped battery cell. Figure 1 As shown, two obvious areas can be observed in the battery 10 during the thermal runaway process, where the dark area represents the thermal runaway zone 11 and the light area represents the normal zone 12. In the thermal runaway zone 11, the thermal runaway reaction has ended, and the temperature in this area is extremely high. For a ternary system battery, the temperature can reach about 1000°C. In the normal zone 12, thermal runaway has not yet occurred, and the regional temperature is close to room temperature. Based on heat transfer theory, there is a transition boundary with a very large temperature gradient between the thermal runaway zone 11 and the normal zone 12, which is defined as the "thermal runaway front 13". During the thermal runaway process of the battery 10, the thermal runaway front 13 continues to advance toward the normal zone 12, and transforms the normal zone 12 into the thermal runaway zone 11.

[0053] The cooling device 20 provided in the embodiment of the present application, when used to cool the thermal runaway front 13 of the battery 10, delivers coolant to the cooling chamber 2113 through the liquid storage tank 212 until the coolant level in the cooling chamber 2113 reaches a preset height; the battery 10 is delivered to the cooling chamber 2113 by the sample delivery mechanism 22, with some batteries 10 immersed in the coolant and some batteries 10 located above the coolant level; the battery 10 located above the coolant level is then triggered by the trigger mechanism 23 to cause thermal runaway. During the thermal runaway process of the battery 10, the thermal runaway front 13 of the battery 10 advances from the trigger position to the non-thermal runaway position within the battery 10, that is, the thermal runaway front 13 continuously advances toward the coolant, and the coolant continuously absorbs the heat of the thermal runaway of the battery 10, cooling the thermal runaway front 13 of the battery 10 during the process, completing the cooling of the thermal runaway front 13 of the battery 10, and then the battery 10 is withdrawn from the cooling chamber 2113 by the sample delivery mechanism 22. That is to say, the cooling device 20 of the present application can trigger thermal runaway of the battery 10 and cool down the front surface of the thermal runaway inside the battery 10, thereby effectively suppressing the spread of thermal runaway inside the battery 10, causing part of the battery 10 to experience thermal runaway and part not to experience thermal runaway, obtaining the thermal runaway front surface 13 of the battery 10, and retaining all products generated in the process from non-thermal runaway to thermal runaway of the battery 10. These products can be confirmed by material characterization instruments such as scanning electron microscopes, energy spectrometers, transmission electron microscopes, X-ray photoelectron spectrometers, and X-ray diffractometers, thereby providing key information for the analysis of the thermal runaway reaction of the battery 10, providing a theoretical basis for suppressing the thermal runaway reaction, and laying the foundation for the development of more effective thermal runaway suppression strategies.

[0054] It should be noted that the liquid level of the coolant in the cooling chamber 2113 can be controlled so that when the battery 10 is sent into the cooling chamber 2113, most of the battery 10 is immersed in the coolant, and a small part of the battery 10 is located above the coolant level. Thermal runaway of the battery 10 can be triggered above the coolant level, so that the thermal runaway front surface 13 of the battery 10 is pushed toward the coolant, so that the thermal runaway front surface 13 can be cooled by the coolant.

[0055] In one embodiment, see Figure 2 and Figure 3 As shown, the sample feeding mechanism 22 includes a fixing component 221 and a first motion module 222, the fixing component 221 is used to fix the battery 10; the first motion module 222 is connected to the fixing component 221; a first opening 2116 connected to the cooling cavity 2113 is opened on the cooling box 211; the first motion module 222 is used to drive the fixing component 221 to move along the axial direction parallel to the first opening 2116, so that the fixing component 221 can enter or leave the cooling cavity 2113 through the first opening 2116.

[0056] Specifically, in the attached Figure 3 From the perspective shown, the first motion module 222 is positioned above the cooling box 211. A first opening 2116 communicating with the cooling chamber is defined at the top of the cooling box 211. Thus, the battery 10 can be secured by the securing assembly 221, and the first motion module 222 drives the securing assembly 221 to move in a direction parallel to the axis of the first opening 2116, allowing the securing assembly 221 to enter or exit the cooling chamber 2113 through the first opening 2116. This, in turn, drives the battery 10 to enter or exit the cooling chamber 2113 through the first opening 2116, thereby conveniently triggering thermal runaway in the battery 10 and cooling the front face 13 of the battery 10 before the cooled battery 10 is removed from the cooling chamber 2113.

[0057] In one example, see Figure 2 As shown, the sample feeding mechanism 22 also includes a first bracket 223; the first motion module 222 can be supported by the first bracket 223 and arranged above the cooling box 211; the first motion module 222 includes two first linear motion components 222a arranged in parallel and spaced apart on the first bracket 223; from the perspective shown in the accompanying drawings, the two first linear motion components 222a are vertically and parallelly arranged on the first bracket 223; the two first linear motion components 222a are connected to the fixed component 221, so that the fixed component 221 can be easily driven to move in a direction parallel to the axial direction of the first opening 2116, thereby improving the stability of the movement of the fixed component 221.

[0058] Further, see Figure 5 As shown, the first linear motion assembly 222a includes a first guide 2221, a first sliding member 2222, and a first driving member (not shown). The first guide 2221 extends in a direction parallel to the axial direction of the first opening 2116 and is fixed to the first bracket 223. The first sliding member 2222 is slidably connected to the first guide 2221. The first driving member is used to drive the first sliding member 2222 to perform linear reciprocating motion along the first guide 2221. The fixed assembly 221 is connected to the two first sliding members 2222. The first guide 2221 can be a guide rail, the first sliding member 2222 can be a slider, and the first driving member can be a linear motor. By controlling the operation of the linear motor, the operation of the first linear motion assembly 222a can be controlled, and thus the operation of the sample feeding mechanism 22 can be controlled, thereby improving the automation level of the cooling device 20 and improving the operating efficiency of the cooling device 20.

[0059] Furthermore, wheels, which may be universal wheels, may be provided at the four corners of the bottom of the first bracket 223. This facilitates the movement and transfer of the sample feeding mechanism 22, allowing the first motion module 222 to be positioned above the cooling box 211 so that the first motion module 222 is aligned with the first opening 2116, allowing the battery 10 to enter or exit the cooling chamber 2113 through the first opening 2116.

[0060] In one embodiment, see Figure 3 、 Figure 7 and Figure 8 As shown, the fixing assembly 221 includes a first fixing member 2211 and a second fixing member 2212 which are spaced apart and arranged in parallel on the first motion module 222; a first limiting portion 2211a is provided on a side of the first fixing member 2211 close to the second fixing member 2212; a second limiting portion 2212a is provided on a side of the second fixing member 2212 close to the first fixing member 2211; the first limiting portion 2211a and the second limiting portion 2212a are used together to limit the battery 10 so as to fix the battery 10 between the first fixing member 2211 and the second fixing member 2212.

[0061] Therefore, by arranging the first fixing member 2211 and the second fixing member 2212 in parallel and at intervals on the first operating module, a first limiting portion 2211a is provided on the side of the first fixing member 2211 close to the second fixing member 2212; a second limiting portion 2212a is provided on the side of the second fixing member 2212 close to the first fixing member 2211, the battery 10 can be conveniently fixed between the first fixing member 2211 and the second fixing member 2212, and the battery 10 can move with the first movement module 222, so that the battery 10 can be conveniently driven to enter or leave the cooling chamber 2113 through the first opening 2116, and then the thermal runaway of the battery 10 can be conveniently triggered and the thermal runaway front surface 13 of the battery 10 can be cooled, and the cooled battery 10 can be pulled out of the cooling chamber 2113, which is beneficial to improving the working efficiency of the cooling device 20.

[0062] Specifically, see Figure 3 and Figure 5 As shown, the first fixing member 2211 can be fixed on the first sliding member 2222 of a first linear motion component 222a, and the second fixing member 2212 can be fixed on the first sliding member 2222 of another first linear motion component 222a. The first fixing member 2211 and the second fixing member 2212 can be arranged relative to each other, and the first limiting portion 2211a and the second limiting portion 2212a can be arranged relative to each other. In this way, the first limiting portion 2211a and the second limiting portion 2212a can be conveniently used to position the battery 10, so that the battery 10 can be conveniently fixed between the first fixing member 2211 and the second fixing member 2212, which is beneficial to the installation and fixation of the battery 10.

[0063] In one embodiment, see Figure 7 As shown, the first limiting portion 2211a includes a first limiting groove 2211b, which is arranged along the extension direction of the first fixing member 2211, and the first limiting groove 2211b is closed at one end close to the cooling box 211, and the first limiting groove 2211b is open at one end away from the cooling box 211; the second limiting portion 2212a is a second limiting groove 2212b, which is arranged along the extension direction of the second fixing member 2212, and the second limiting groove 2212b is closed at one end close to the cooling box 211, and the second limiting groove 2212b is open at one end away from the cooling box 211; the first limiting groove 2211b and the second limiting groove 2212b are used to accommodate and limit the opposite sides of the battery 10.

[0064] Specifically, the open ends of the first limiting groove 2211b and the second limiting groove 2212b are arranged on the same side, and the closed ends of the first limiting groove 2211b and the second limiting groove 2212b are arranged on the same side; Figure 7 From the perspective shown, the top of the first limiting groove 2211b is open, and the bottom of the first limiting groove 2211b is closed. The top of the second limiting groove 2212b is open, and the bottom of the second limiting groove 2212b is closed. When securing the battery 10, the battery 10 can be inserted from the open ends of the first limiting groove 2211b and the second limiting groove 2212b to achieve the desired fixation. The open ends of the first limiting groove 2211b and the second limiting groove 2212b also facilitate the removal of the battery 10. That is to say, by making the first limiting portion 2211a include a first limiting groove 2211b, and the second limiting portion 2212a being a second limiting groove 2212b, the first limiting groove 2211b is closed at one end close to the cooling box 211, and the first limiting groove 2211b is open at one end away from the cooling box 211; the second limiting groove 2212b is closed at one end close to the cooling box 211, and the second limiting groove 2212b is open at one end away from the cooling box 211, which can facilitate the fixing and removal of the battery 10, thereby helping to improve the working efficiency of the cooling device 20.

[0065] For a specific example, see Figure 8 and Figure 9 As shown, the first fixing member 2211 and the second fixing member 2212 are both L-shaped structures, and the first limiting groove 2211b and the second limiting groove 2212b are both L-shaped.

[0066] In one embodiment, see Figure 10As shown, the sample feeding mechanism 22 also includes a clamping assembly 224, which includes a first clamping piece 2241 and a second clamping piece 2242. The first clamping piece 2241 and the second clamping piece 2242 are arranged opposite to each other and connected to each other. The first clamping piece 2241 and the second clamping piece 2242 are used to clamp the battery 10; the first limiting portion 2211a and the second limiting portion 2212a are used to limit the clamping assembly 224.

[0067] Specifically, from the perspective shown in the accompanying drawings, the battery 10 is disposed between the first clamping piece 2241 and the second clamping piece 2242. The first clamping piece 2241 and the second clamping piece 2242 are interconnected, thereby clamping the battery 10 between the first clamping piece 2241 and the second clamping piece 2242. When thermal runaway occurs in the battery 10, gas is generated inside the battery 10, causing the battery 10 to expand. The first clamping piece 2241 and the second clamping piece 2242 can limit the gas production and expansion of the battery 10 during thermal runaway, thereby resolving the problem of low heat exchange efficiency caused by gas production and expansion, and improving the cooling effect of the coolant on the battery 10. This effectively suppresses the spread of thermal runaway within the battery 10, ensuring that thermal runaway occurs partially within the battery 10 and does not occur in other parts, thereby obtaining the thermal runaway front 13 of the battery 10.

[0068] The first limiting portion 2211a is a first limiting groove 2211b, and the second limiting portion 2212a is a second limiting groove 2212b. The first limiting groove 2211b and the second limiting groove 2212b cooperate to accommodate and limit opposite sides of the clamping assembly 224. The clamping assembly 224 can be fixed by inserting it through the open ends of the first limiting groove 2211b and the second limiting groove 2212b. The open ends of the first limiting groove 2211b and the second limiting groove 2212b also facilitate the removal of the clamping assembly 224. When the clamping assembly 224 holds the battery 10, the clamping assembly 224 and the battery 10 can be inserted and removed as a whole.

[0069] In one embodiment, see Figure 3 and Figure 10 As shown, a first through hole 2243 is provided on at least one of the first clamping piece 2241 and the second clamping piece 2242, and the first through hole 2243 is used to expose part of the battery 10; a plurality of first temperature sensors (not shown) are spaced apart and arranged on at least one of the first clamping piece 2241 and the second clamping piece 2242, and the first temperature sensors are used to monitor the temperature of the battery 10.

[0070] Thus, by providing a first through hole 2243 on at least one of the first clamping piece 2241 and the second clamping piece 2242, the trigger mechanism 23 can easily pass through the first through hole 2243 to directly trigger thermal runaway in the battery 10, causing the battery 10 to quickly experience thermal runaway and shortening the time required from the onset of thermal runaway to the cooling of the thermal runaway front 13 of the battery 10, thereby improving the operating efficiency of the cooling device 20. By providing multiple first temperature sensors at intervals on at least one of the first clamping piece 2241 and the second clamping piece 2242, the first temperature sensors are used to monitor the temperature of the battery 10. In this way, the spread of thermal runaway in the battery 10 and the cooling of the thermal runaway front 13 of the battery 10 can be monitored in real time through temperature, ensuring that the thermal runaway front 13 of the battery 10 is completely cooled.

[0071] It should be noted that, see Figure 10 As shown, a plurality of second through holes 2244 may be provided on the first clamping piece 2241 and the second clamping piece 2242 so that the first clamping piece 2241 and the second clamping piece 2242 can be fixedly connected by fasteners.

[0072] In one embodiment, see Figure 10 As shown, a guide tube 2245 is provided on at least one of the first clamping piece 2241 and the second clamping piece 2242. The guide tube 2245 corresponds to the position of the first through hole 2243 and is connected to the first through hole 2243. The end of the guide tube 2245 away from the first through hole 2243 is trumpet-shaped.

[0073] Therefore, when the trigger mechanism 23 is a contact trigger mechanism 23, that is, the trigger mechanism 23 needs to contact the battery 10 to trigger thermal runaway, the guide tube 2245 can play a guiding and positioning role, ensuring that the trigger mechanism 23 contacts the battery 10 to trigger thermal runaway.

[0074] In one embodiment, see Figure 2 、 Figure 4 and Figure 6 As shown, the trigger mechanism 23 includes a thermal runaway trigger 231 and a second motion module 232. A second opening 2117 communicating with the cooling chamber 2113 is provided on one side of the cooling box 211. The thermal runaway trigger 231 is used to cause local heating of the battery 10 through the second opening 2117 to trigger thermal runaway of the battery 10. The second motion module 232 is connected to the thermal runaway trigger 231 and is used to drive the thermal runaway trigger 231 to move closer to or away from the cooling box 211.

[0075] Therefore, when it is necessary to trigger thermal runaway of the battery 10, the thermal runaway trigger 231 is driven close to the cooling box 211 by the second motion module 232, so that the thermal runaway trigger 231 can pass through the second opening 2117 to cause local heating of the battery 10, thereby triggering thermal runaway of the battery 10. After the triggering is completed, the thermal runaway trigger 231 is driven away from the cooling box 211 by the second motion module 232 to ensure the safety of the thermal runaway trigger 231 and prevent the thermal runaway of the battery 10 from affecting the trigger.

[0076] In one example, the trigger mechanism 23 may be a contact trigger mechanism 23. The thermal runaway trigger 231 includes but is not limited to an electromagnetic heating trigger, a resistance heating trigger, and a needle puncture trigger.

[0077] Specifically, the electromagnetic heating trigger includes a power supply and an induction coil. The induction coil is fixed to the second motion module 232 and connected to the power supply. When it is necessary to trigger thermal runaway of the battery 10, the second motion module 232 is used to drive the electromagnetic heating trigger close to the cooling box 211. The induction coil passes through the second opening 2117 and contacts the battery 10. The control power supply is controlled to pass alternating current into the induction coil to form an alternating magnetic field. Under the action of the alternating magnetic field, eddy currents are generated in the current collector inside the battery 10, causing the current collector to heat up, causing local heating of the battery 10, and triggering thermal runaway of the battery 10.

[0078] The resistance heating trigger includes a power supply and a resistance wire. The resistance wire is fixed to the second motion module 232 and connected to the power supply. When thermal runaway of the battery 10 is to be triggered, the second motion module 232 is used to drive the resistance heating trigger close to the cooling box 211. The resistance wire passes through the second opening 2117 and contacts the battery 10. The power supply is then controlled to energize the resistance wire. The heating of the resistance wire causes localized heating of the battery 10, triggering thermal runaway.

[0079] The puncture trigger includes a puncture member, such as a puncture needle, which is fixed to the second motion module 232. When it is necessary to trigger thermal runaway of the battery 10, the second motion module 232 is used to drive the puncture trigger close to the cooling box 211. The puncture member passes through the second opening 2117 and contacts the battery 10. The puncture member punctures the diaphragm inside the battery 10, causing a short circuit between the cathode and anode of the battery 10, causing local heating of the battery 10 and triggering thermal runaway.

[0080] In another example, the trigger mechanism 23 may be a non-contact trigger mechanism 23, and the thermal runaway trigger 231 includes but is not limited to a laser trigger, which includes a laser emitter disposed on the second motion module 232. When thermal runaway of the battery 10 needs to be triggered, the second motion module 232 is used to drive the laser emitter close to the cooling box 211. The laser light emitted by the laser emitter passes through the second opening 2117 and strikes the surface of the battery 10, causing local heating of the battery 10, thereby triggering thermal runaway of the battery 10.

[0081] In one embodiment, see Figure 2 and Figure 6 As shown, the trigger mechanism 23 further includes a second bracket 233 , and the second motion module 232 is disposed on the second bracket 233 . Travel wheels can be disposed at the four corners of the bottom of the second bracket 233 , so that the movement and transfer of the trigger mechanism 23 can be facilitated.

[0082] In one embodiment, see Figure 6 As shown, the second motion module 232 includes a second linear motion component 232a, which can be set on the second bracket 233 and is used to drive the thermal runaway trigger 231 to perform linear reciprocating motion along a direction parallel to the axial direction of the second opening 2117.

[0083] Specifically, see Figure 6 As shown, the second linear motion assembly 232a includes a second guide 2321, a second sliding member 2322, and a second driving member (not shown). The second guide 2321 extends in a direction parallel to the axial direction of the second opening 2117 and is fixed to the second bracket 233. The second sliding member 2322 is slidably connected to the second guide 2321. The second driving member is used to drive the second sliding member 2322 to perform linear reciprocating motion along the second guide 2321. The thermal runaway trigger 231 is connected to the second sliding member 2322. The second guide 2321 can be a guide rail, and the second sliding member 2322 can be a slider. The second driving member can be a linear motor. By controlling the operation of the linear motor, the operation of the second linear motion assembly 232a can be controlled, and thus the operation of the trigger mechanism 23 can be controlled, thereby improving the automation level of the cooling device 20 and improving the operating efficiency of the cooling device 20.

[0084] In one embodiment, see Figure 3As shown, the cooling box 211 includes a first shell 2111 and a second shell 2112. The first shell 2111 encloses a cooling cavity 2113. The first shell 2111 is provided with a first opening 2116 that communicates with the cooling cavity 2113. The cross-sectional area of ​​the cooling cavity 2113 gradually decreases from the side close to the first opening 2116 to the side away from the first opening 2116. The second shell 2112 is provided on the periphery of the first shell 2111. An insulation cavity 2114 is formed between the second shell 2112 and the first shell 2111, and the insulation cavity 2114 is filled with an insulation layer 2115.

[0085] Thus, by making the cooling box 211 include a first shell 2111 and a second shell 2112, the first shell 2111 encloses a cooling chamber 2113, and a heat-insulating chamber 2114 is formed between the second shell 2112 and the first shell 2111, surrounding the cooling chamber 2113. The heat-insulating chamber 2114 is filled with a heat-insulating layer 2115. This reduces heat exchange between the cooling chamber 2113 and the external environment, ensuring the cooling capacity of the coolant in the cooling chamber 2113, thereby facilitating improved cooling efficiency of the cooling device 20. By providing a first opening 2116 in communication with the cooling chamber 2113 on the first shell 2111, the sample delivery mechanism 22 can conveniently deliver the battery 10 to or from the cooling chamber 2113 through the first opening 2116. By gradually reducing the cross-sectional area of ​​the cooling cavity 2113 from the side close to the first opening 2116 to the side away from the first opening 2116, the drop in the liquid level of the coolant when cooling the thermal runaway front surface 13 of the battery 10 can be slowed down, which is conducive to maintaining stable cooling conditions and improving the success rate of freezing the thermal runaway front surface 13 of the battery 10. At the same time, it can help reduce the amount of freezing liquid required to freeze the thermal runaway front surface 13 of the battery 10.

[0086] For a specific example, see Figure 3 As shown, cooling chamber 2113 may be a T-shaped cooling chamber 2113, comprising a first cavity 2113a and a second cavity 2113b that are interconnected. First cavity 2113a is in communication with first opening 2116. The cross-sectional area of ​​first cavity 2113a is greater than that of second cavity 2113b. Due to the larger cross-sectional area of ​​first cavity 2113a, first cavity 2113a can accommodate a larger amount of refrigerant per unit height. During the cooling process, the coolant level in first cavity 2113a decreases less, thereby maintaining stable cooling conditions and improving the success rate of freezing the thermal runaway front 13 of battery 10.

[0087] In a specific example, the bottom of the cooling box 211 is provided with running wheels to facilitate the movement and transfer of the cooling box 211 .

[0088] In one embodiment, see Figure 3 As shown, the cooling system 21 also includes a liquid inlet pipe 213, a buffer pipe 214, a liquid discharge pipe 215 and a liquid level monitoring pipe 216; the liquid inlet pipe 213 connects the liquid storage tank 212 and the buffer pipe 214, and the liquid inlet pipe 213 is provided with a first control valve 24; the buffer pipe 214 is arranged in the heat preservation chamber 2114, and the buffer pipe 214 is connected to the cooling chamber 2113, and the diameter of the buffer pipe 214 gradually increases from the end close to the liquid inlet pipe 213 to the end close to the cooling chamber 2113; the liquid discharge pipe 215 is arranged in the heat preservation chamber 2114, and one end of the liquid discharge pipe 215 is connected to the cooling chamber 2113. 13 is connected, the other end of the drain pipe 215 is located outside the cooling box 211, and the other end of the drain pipe 215 is provided with a second control valve 25; the liquid level monitoring pipe 216 is provided in the heat preservation chamber 2114, and the liquid level monitoring connects the outside and the cooling chamber 2113; the liquid level monitoring pipe 216 is provided with a liquid level sensor 26, a second temperature sensor 27 and a pressure sensor 28; the liquid level sensor 26 is used to monitor the liquid level in the cooling chamber 2113; the second temperature sensor 27 is used to monitor the temperature of the coolant; and the pressure sensor 28 is used to monitor the pressure in the cooling chamber 2113.

[0089] Thus, the inlet pipe 213 and buffer pipe 214 facilitate communication between the liquid storage tank 212 and the cooling chamber 2113. The first control valve 24 facilitates remote control of the connection between the liquid storage tank 212 and the cooling chamber 2113, thereby delivering coolant to the cooling chamber 2113. By gradually increasing the diameter of the buffer pipe 214 from the end closest to the inlet pipe 213 toward the end closest to the cooling chamber 2113, the impact force during coolant delivery is reduced, minimizing the disturbance of the coolant level within the cooling chamber 2113 during delivery. The provision of a drain pipe 215 and a second control valve 25 facilitates remote control of the coolant discharge from the cooling chamber 2113. The provision of a liquid level monitoring pipe 216 connected to the cooling chamber 2113 mitigates the level fluctuations caused by violent boiling of the coolant during the cooling process of the battery 10 in the event of thermal runaway. A liquid level sensor 26 , a second temperature sensor 27 and a pressure sensor 28 are provided on the liquid level monitoring tube 216 , which can conveniently monitor the liquid level, temperature and pressure in the cooling chamber 2113 to ensure safe and stable operation of the cooling device 20 .

[0090] It should be noted that the liquid inlet pipe 213 can have a uniform diameter, that is, the diameter of the liquid inlet pipe 213 is the same along its extension direction. The diameter of the liquid inlet pipe 213 can also be configured to gradually increase. For example, the diameter of the liquid inlet pipe 213 can gradually increase from the end near the liquid storage tank 212 to the end near the buffer tube 214. The minimum diameter of the buffer tube 214 can be larger than the maximum diameter of the liquid inlet pipe 213. This effectively reduces the impact force of the coolant and minimizes the disturbance of the coolant level within the cooling chamber 2113 during coolant delivery.

[0091] In one embodiment, the liquid storage tank 212 includes a high-pressure tank body, and the coolant is a liquid with high latent heat of vaporization, such as liquid nitrogen. Travel wheels are provided at the bottom of the liquid storage tank 212.

[0092] In one embodiment, see Figure 3 As shown, it also includes a control system 29, which is connected to the cooling system 21, the sample feeding mechanism 22 and the trigger mechanism 23. The control system 29 is used to control the operation of the cooling system 21, the sample feeding mechanism 22 and the trigger mechanism 23.

[0093] Specifically, the control system 29 can be connected to the first control valve 24, the second control valve 25, the first motion module 222, the second motion module 232, the first temperature sensor, the second temperature sensor 27, the liquid level sensor 26 and the pressure sensor 28. In this way, the control system 29 can control the first control valve 24, the second control valve 25, the first motion module 222 and the second motion module 232 according to the information monitored by the first temperature sensor, the second temperature sensor 27, the liquid level sensor 26 and the pressure sensor 28 to ensure the safe and stable operation of the cooling device 20 and improve the degree of automation of the cooling device 20.

[0094] The following describes the use of the cooling device 20 according to the embodiment of the present application with reference to specific examples:

[0095] Taking the long strip battery 10 as an example, the use process of the cooling device 20 of the present application is described as follows:

[0096] The use process of the cooling device 20 includes:

[0097] The long rectangular battery 10 is clamped by a clamping assembly 224, and six first temperature sensors are set on at least one of the first clamping piece 2241 and the second clamping piece 2242 of the clamping assembly 224. The six first temperature sensors can be arranged at intervals along the length direction of the battery. Along the direction away from the first through hole 2243 of the clamping assembly 224, the six first temperature sensors are respectively recorded as sensor 1, sensor 2, sensor 3, sensor 4, sensor 5, and sensor 6.

[0098] The clamping assembly 224 with the battery 10 is fixed to the first motion module 222 via the fixing assembly 221 .

[0099] The control system 29 controls the first control valve 24 to open, so that the coolant is injected into the cooling cavity 2113 until the coolant level reaches a preset height, and then closes the first control valve 24 to stop the injection.

[0100] The control system 29 controls the first motion module 222 to operate, and the battery 10 is connected to the clamping assembly 224 and sent into the cooling chamber 2113 until it descends to a preset position.

[0101] The second motion module 232 is controlled by the control system 29 to operate, so that the thermal runaway trigger 231 moves toward the cooling box 211, and the thermal runaway trigger 231 is controlled to pass through the first through hole 2243 to trigger thermal runaway of the battery 10. The battery thermal runaway front surface advances from the trigger position to the non-thermal runaway position inside the battery 10, that is, the battery thermal runaway front surface advances toward the coolant direction.

[0102] The coolant in the cooling chamber 2113 absorbs the heat of the battery thermal runaway and freezes the front surface of the battery thermal runaway during the movement. At this point, the freezing of the front surface of the battery thermal runaway is completed.

[0103] Figure 11 The schematic diagram of the structure of the battery after cooling and removing the aluminum-plastic film is shown. Figure 11 The thermal runaway zone, normal zone, and thermal runaway front of the battery can be clearly seen in the image, indicating that the thermal runaway front of the battery has been successfully cooled. The cooling device of the present application can cool the thermal runaway front and effectively suppress the spread of thermal runaway of the battery. Figure 12 The figure shows a temperature curve during the cooling process of the battery's thermal runaway front, specifically a temperature curve generated based on six first temperature sensors. As can be seen from the figure, the temperatures of sensors 1-3 all rise, indicating that thermal runaway has occurred locally in the battery. However, the temperatures of sensors 4-6 have not risen to the thermal runaway temperature, indicating that the advancement of the thermal runaway front has been suppressed and the thermal runaway front has been successfully cooled within the battery. Therefore, it can be seen that the cooling device 20 of the present application can trigger thermal runaway in the battery and cool down the internal thermal runaway front, thereby effectively suppressing the spread of thermal runaway within the battery, causing thermal runaway to occur in some parts of the battery while not in others. The thermal runaway front of the battery is obtained, preserving all products produced during the process from non-thermal runaway to thermal runaway. This provides key information for analyzing the battery's thermal runaway reaction, provides a theoretical basis for suppressing thermal runaway reactions, and lays the foundation for developing more effective thermal runaway suppression strategies.

[0104] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A cooling device for cooling the thermal runaway front of a battery, characterized in that: include: The cooling system includes a cooling box and a liquid storage tank, wherein the cooling box is provided with a cooling cavity, and the liquid storage tank is used to transport coolant into the cooling cavity; A sample delivery mechanism, the sample delivery mechanism is used to deliver the battery into the cooling chamber so that part of the battery is immersed in the coolant and part of the battery is located above the coolant level; the sample delivery mechanism is also used to extract the cooled battery from the cooling chamber; The trigger mechanism is used to trigger thermal runaway at the portion of the battery exposed above the coolant level, so that the thermal runaway front advances toward the coolant and is cooled, thereby suppressing the spread of thermal runaway and retaining reaction products on the thermal runaway front.

2. The cooling device according to claim 1, characterized in that The sample delivery mechanism includes: A fixing assembly, the fixing assembly being used to fix the battery; A first motion module, the first motion module is connected to the fixed component; a first opening connected to the cooling cavity is provided on the cooling box; the first motion module is used to drive the fixed component to move along an axial direction parallel to the first opening, so that the fixed component can enter or leave the cooling cavity through the first opening.

3. The cooling device according to claim 2, characterized in that The fixing assembly includes a first fixing member and a second fixing member which are spaced apart and arranged parallel to each other on the first motion module; A first limiting portion is provided on a side of the first fixing member close to the second fixing member; a second limiting portion is provided on a side of the second fixing member close to the first fixing member; the first limiting portion and the second limiting portion cooperate to limit the battery so as to fix the battery between the first fixing member and the second fixing member.

4. The cooling device according to claim 3, characterized in that The first limiting portion includes a first limiting groove, which is arranged along the extension direction of the first fixing member, and the first limiting groove is closed at one end close to the cooling box and is open at one end away from the cooling box; The second limiting portion is a second limiting groove, which is arranged along the extension direction of the second fixing member. The second limiting groove is closed at one end close to the cooling box, and is open at one end away from the cooling box. The first limiting groove and the second limiting groove cooperate to accommodate and limit two opposite sides of the battery.

5. The cooling device according to claim 3, characterized in that The sample feeding mechanism further includes a clamping assembly, the clamping assembly including a first clamping piece and a second clamping piece, the first clamping piece and the second clamping piece are arranged opposite to each other and connected to each other, and the first clamping piece and the second clamping piece cooperate to clamp the battery; The first limiting portion and the second limiting portion cooperate to limit the clamping assembly.

6. The cooling device according to claim 5, characterized in that A first through hole is provided on at least one of the first clamping piece and the second clamping piece, and the through hole is used to expose a portion of the battery; a plurality of first temperature sensors are spaced apart on at least one of the first clamping piece and the second clamping piece, and the first temperature sensors are used to monitor the temperature of the battery.

7. The cooling device according to claim 1, characterized in that The trigger mechanism comprises: A thermal runaway trigger, wherein a second opening communicating with the cooling chamber is provided on one side of the cooling box; the thermal runaway trigger is configured to pass through the second opening to induce local heating of the battery, thereby triggering thermal runaway of the battery; A second motion module is connected to the thermal runaway trigger, and is used to drive the thermal runaway trigger to move closer to or away from the cooling box.

8. The cooling device according to claim 1, characterized in that The cooling box includes a first shell and a second shell, the first shell enclosing the cooling cavity, and the first shell is provided with a first opening communicating with the cooling cavity; the cross-sectional area of ​​the cooling cavity gradually decreases from a side close to the first opening to a side away from the first opening; The second shell is arranged on the periphery of the first shell, and a heat preservation cavity surrounding the cooling cavity is formed between the second shell and the first shell. The heat preservation cavity is filled with a heat preservation layer.

9. The cooling device according to claim 8, characterized in that The cooling system also includes a liquid inlet pipe, a buffer pipe, a liquid discharge pipe and a liquid level monitoring pipe; The liquid inlet pipe connects the liquid storage tank and the buffer pipe, and a first control valve is provided on the liquid inlet pipe; the buffer pipe is arranged in the heat preservation chamber, and the buffer pipe is communicated with the cooling chamber, and the diameter of the buffer pipe gradually increases from the end close to the liquid inlet pipe to the end close to the cooling chamber; The drain pipe is arranged in the heat preservation chamber, one end of the drain pipe is communicated with the cooling chamber, the other end of the drain pipe is located outside the cooling box, and the other end of the drain pipe is provided with a second control valve; A liquid level monitoring tube is provided in the insulation cavity, and the liquid level monitoring tube connects the outside and the cooling cavity; a liquid level sensor, a second temperature sensor and a pressure sensor are provided on the liquid level monitoring tube, and the liquid level sensor is used to monitor the liquid level in the cooling cavity; the second temperature sensor is used to monitor the temperature of the coolant; and the pressure sensor is used to monitor the pressure in the cooling cavity.

10. The cooling device according to claim 1, characterized in that It also includes a control system, which is connected to the cooling system, the sample feeding mechanism and the trigger mechanism, and is used to control the operation of the cooling system, the sample feeding mechanism and the trigger mechanism.

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