An elastically compressed self-puncturing fire-fighting module

Abstract

The present invention discloses an elastically compressed self-puncturing fire-fighting module. It relates to the field of new energy battery technology. The present application specifically includes a plurality of battery cells, a pressure relief valve arranged on the side of the battery cell, and two elastic compression devices arranged on the outside of the plurality of battery cells; a clamping area is formed between the two elastic compression devices to clamp the plurality of battery cells, and the width of the clamping area is adjustable. A puncturing cone is provided on the elastic compression device to puncture the pressure relief valve on the side of the outermost battery cell. The width of the clamping area formed between the two elastic compression devices of the present invention can be adjusted, which not only enables the two elastic compression devices to clamp and fix a plurality of battery cells of different sizes, but also effectively compensates for the bulging size of the battery cell by adjusting the width of the clamping area, which can effectively ensure that the size of the module is not deformed or damaged, and effectively prolongs the service life of the battery cell while ensuring the safety of the battery cell.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and in particular to an elastically compressed self-puncturing fire-fighting module.

[0002] When the battery cells in the battery module are in thermal runaway, they will generate a large amount of high-temperature and high-pressure gas. In order to avoid excessive temperature and pressure in the battery module, the gas generated by the battery cells needs to be discharged in time. The existing modules are equipped with a battery cell explosion-proof valve on the battery cell cover. When the battery cell pressure is too high, the gas is discharged through the battery cell explosion-proof valve to prevent the battery cell from having a safety accident. However, under normal circumstances, as the degree of thermal runaway of the battery cell is relatively serious, the explosion-proof valve is not enough to solve the fire safety problem of the battery cell or module.

[0003] Another problem with existing battery modules is that when the battery cells are assembled into modules, the expansion force of the battery cells is generally offset and absorbed by applying glue or foam pads between the battery cells, and then they are clamped by end plates and effectively tightened by metal steel belts. The clamping force of this method cannot be automatically adjusted as the battery ages, so it is impossible to effectively compensate for the swollen size of the battery cells, thereby affecting the safe use of the module.

[0004] Chinese patent CN213184453U, published on May 24, 2022, discloses an aluminum shell battery module frame, which belongs to the field of battery technology, and includes a first side panel, a second side panel, a first end panel and a second end panel, wherein the first side panel, the first end panel, the second side panel and the second end panel are sequentially connected to form a rectangular frame, the first side panel and the second side panel are symmetrically arranged, the first end panel and the second end panel are symmetrically arranged, and the contact surfaces of the first end panel and the second end panel with the battery module are provided with a pre-tightening structure for applying a constant pre-tightening force to the battery module. The pressing force of the frame on the battery cell can be automatically adjusted as the battery life increases, so as to effectively compensate for the bulging size of the battery cell, but it cannot solve the problem that a large amount of high-temperature and high-pressure gas needs to be discharged when the battery cell is in thermal runaway, so the module cannot be subjected to fire treatment, and thus the safety of the module cannot be guaranteed. Summary of the invention

[0005] The purpose of the present invention is to provide an elastically compressed self-puncturing fire-fighting module to address the deficiencies of the above-mentioned prior art, which can not only quickly carry out fire-fighting treatment on the battery cell when thermal runaway occurs, but also effectively compensate for the swelling size when the battery cell swells, thereby ensuring the safe use of the module.

[0006] The present invention proposes an elastic compression self-puncture fire-fighting module, comprising a plurality of battery cells, a pressure relief valve arranged on the side of the battery cells, and two elastic compression devices arranged on the outside of the plurality of battery cells; a clamping area is formed between the two elastic compression devices for clamping the plurality of battery cells, the width of the clamping area is adjustable, and a puncture cone is provided on the elastic compression device for puncturing the pressure relief valve on the side of the outermost battery cell.

[0007] Furthermore, the elastic clamping device includes an outer plate, an inner plate and a spring arranged between the outer plate and the inner plate, one end of the spring is connected to the outer plate, and the other end is connected to the inner plate, and the inner plate abuts against the side of the outermost battery cell.

[0008] Furthermore, the puncture cone is arranged on the outer plate, and one end extends toward the inner plate. The inner plate is provided with a through hole for the puncture cone to pass through. The length of the puncture cone is less than the length of the spring in a naturally extended state.

[0009] Furthermore, the two pressure relief valves are arranged on the side of the battery cell, the two puncture cones are arranged on the outer plate, the two through holes are arranged on the inner plate, the two pressure relief valves are arranged diagonally on the side of the battery cell, and the positions of the two puncture cones and the two through holes correspond to the two pressure relief valves respectively.

[0010] Furthermore, the outer plate is provided with a cavity for loading the fire-fighting medium, and an exhaust hole for exhausting the fire-fighting medium in the cavity.

[0011] Furthermore, the inner plate is provided with an air guide hole, and the outer plate is also provided with an air inlet hole connecting the cavity with the outside, and the air guide hole is used to guide the gas released by the pressure relief valve to the air inlet hole.

[0012] Furthermore, central axes of the air guide hole, the spring and the air inlet hole are on the same straight line.

[0013] Furthermore, the spring sleeve is arranged on the periphery of the puncturing cone, the air inlet hole is arranged on the puncturing cone, and the central axis of the air inlet hole is in the same straight line as the central axis of the puncturing cone.

[0014] Furthermore, an explosion-proof valve is provided at the bottom of the battery cell.

[0015] Furthermore, the fire fighting module also includes a tie for tying the two elastic clamping devices and the plurality of battery cells together.

[0016] The elastic compression self-puncturing fire fighting module of the present invention has the following gain effects:

[0017] (1) A pressure relief valve is provided on the side of each battery cell of the fire protection module. When the battery cell experiences severe thermal runaway, the pressure relief valve can quickly release the gas in the battery cell, thereby ensuring the safety of the module;

[0018] (2) The width of the clamping area formed between the two elastic clamping devices of the fire protection module can be adjusted, which not only enables the two elastic clamping devices to clamp and fix multiple battery cells of different sizes, but also effectively compensates for the expansion size of the battery cell by adjusting the width of the clamping area. This can effectively ensure that the size of the module is not deformed or damaged, and effectively extend the service life of the battery cell while ensuring the safety of the battery cell;

[0019] (3) The elastic clamping device of the fire-fighting module is provided with a puncture cone. When the battery cell swells further to the limit, the puncture cone will actively puncture the pressure relief valve on the side of the outermost battery cell to provide active safety protection and further ensure the safety of the module;

[0020] (4) Two pressure relief valves are provided on the side of the battery cell of the fire protection module, and the two pressure relief valves are arranged diagonally on the side of the battery cell. When the battery cell produces severe thermal runaway, the two pressure relief valves can quickly release the gas in the battery cell, thereby further ensuring the safety of the module;

[0021] (5) The outer plate of the fire-fighting module is provided with a cavity and an exhaust hole. The cavity is loaded with a fire-fighting medium, and the exhaust hole connects the cavity with the outside. When the battery cell has thermal runaway, the fire-fighting medium in the cavity is discharged through the exhaust hole to cool the battery cell and prevent the battery cell from catching fire due to thermal runaway, thereby extinguishing the fire of the module and ensuring the safe use of the module;

[0022] (6) The outer plate of the fire-fighting module is provided with an air inlet hole, and the inner plate is provided with an air guide hole. The pressure relief valve releases the gas in the battery cell, and the guide hole guides the released gas to the air inlet hole, and then enters the cavity of the outer plate through the air inlet hole. Under the action of the gas pressure, the liquid perfluorohexanone in the cavity is discharged from the exhaust hole to extinguish the fire in the module;

[0023] (7) The spring of the fire-fighting module can be sleeved on the periphery of the puncture cone, so that the puncture cone limits the extension and contraction of the spring, preventing the spring from having a large lateral deviation during extension and contraction, thereby affecting the clamping effect of the elastic clamping device on multiple battery cells;

[0024] (8) An explosion-proof valve is installed at the bottom of each battery cell of the fire protection module. When the battery cell fails normally, the explosion-proof valve at the bottom of the battery cell is activated to release the pressure to ensure the safety of the battery cell. When the explosion-proof valve at the bottom of the battery cell fails or the battery cell is violently out of control, the pressure relief valve on the side of the battery cell can quickly release the gas from the module. This double explosion-proof design on the battery cell further ensures the safety of the module. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In the accompanying drawings, like reference numerals are used to represent like elements.

[0026] Figure 1 This is a structural schematic diagram of an elastically compressed self-puncturing fire-fighting module according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the installation of a pressure relief valve and an explosion-proof valve of an elastically compressed self-puncturing fire-fighting module on a battery cell according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic structural diagram of an elastic pressing device of an elastic pressing self-puncturing fire fighting module according to an embodiment of the present invention;

[0029] Figure 4 This is a structural schematic diagram of an implementation method of an elastically compressed self-puncturing fire-fighting module of an embodiment of the present invention.

[0030] In the figure: 1. battery cell; 2. pressure relief valve; 3. elastic clamping device; 31. outer plate; 311. air inlet; 312. exhaust hole; 32. inner plate; 321. through hole; 33. spring; 34. puncture cone; 4. explosion-proof valve; 5. cable tie. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] See also Figure 1 to Figure 4 An elastic compression self-puncturing fire-fighting module according to an embodiment of the present invention comprises a plurality of battery cells 1, a pressure relief valve 2 arranged on the side of the battery cell 1, and two elastic compression devices 3 arranged on the outside of the plurality of battery cells 1; a clamping area is formed between the two elastic compression devices 3 for clamping the plurality of battery cells 1, and the width of the clamping area is adjustable; a puncturing cone 34 is provided on the elastic compression device 3 for puncturing the pressure relief valve 2 on the side of the outermost battery cell 1.

[0033] In the present application, the module includes a plurality of battery cells 1 arranged in parallel, and a pressure relief valve 2 is provided on the side of each battery cell 1. When the battery cell 1 produces severe thermal runaway, the pressure relief valve 2 can quickly release the gas in the battery cell 1, thereby ensuring the safe use of the module. The plurality of battery cells 1 arranged in parallel are regarded as an integral battery pack, and an elastic clamping device 3 is provided on each side of the battery pack. A clamping area is formed between the two elastic clamping devices 3. The plurality of battery cells 1 arranged in parallel are located in the clamping area, and the two outermost battery cells 1 are respectively abutted by two elastic clamping devices 3, so that the plurality of battery cells 1 located in the clamping area are clamped, thereby achieving the fixation of the plurality of battery cells 1 in the module.

[0034] Since the width of the clamping area formed between the two elastic clamping devices 3 can be adjusted, on the one hand, by adjusting the width of the clamping area, the two elastic clamping devices 3 can clamp and fix multiple battery cells 1 of different sizes, so that the module is suitable for battery cells 1 of different sizes, thereby enhancing the application range of the module and reducing the production cost; on the other hand, when the battery cell 1 is used for too long and causes the inside of the battery cell 1 to swell due to gas production, the swollen size of the battery cell 1 can be effectively compensated by adjusting the width of the clamping area, which can effectively ensure that the size of the module is not deformed or damaged, thereby effectively extending the service life of the battery cell 1 while ensuring the safety of the battery cell 1.

[0035] In the present application, a puncture cone 34 is provided on the elastic clamping device 3. When the service life of the battery cell 1 is delayed and the battery cell 1 swells to a certain extent, the puncture cone 34 on the elastic clamping device 3 will fit with the pressure relief valve 2 on the side of the outermost battery cell 1. When the swelling of the battery cell 1 further reaches the limit, the puncture cone 34 will actively puncture the pressure relief valve 2 on the side of the outermost battery cell 1 to perform active safety protection and further ensure the safe use of the module.

[0036] In this embodiment, the elastic clamping device 3 includes an outer plate 31, an inner plate 32, and a spring 33 disposed between the outer plate 31 and the inner plate 32, one end of the spring 33 is connected to the outer plate 31, and the other end is connected to the inner plate 32, and the inner plate 32 abuts against the side of the outermost battery cell 1. The elastic clamping device 3 includes an outer plate 31, an inner plate 32, and a spring 33, and the spring 33 is disposed between the outer plate 31 and the inner plate 32, and one end is connected to the outer plate 31, and the other end is connected to the inner plate 32. When a plurality of battery cells 1 arranged in parallel are located in the clamping area between the two elastic clamping devices 3, the inner plates 32 of the two elastic clamping devices 3 abut against the sides of the two outermost battery cells 1, respectively, thereby clamping the plurality of battery cells 1, and achieving the fixation of the plurality of battery cells 1 in the module.

[0037] It can be foreseen that the area between the two inner plates 32 is the clamping area. Through the expansion and contraction ability of the spring 33 between the inner plate 32 and the outer plate 31, the distance between the outer plate 31 and the inner plate 32 of the same elastic clamping device 3 is increased or decreased. When the outer plate 31 is fixed, the distance between the inner plates 32 of the two elastic clamping devices 3 is increased or decreased, that is, the width of the clamping area is increased or decreased, so that the two elastic clamping devices 3 can clamp and fix multiple battery cells 1 of different sizes, thereby enhancing the applicability of the module.

[0038] When the battery cell 1 swells due to gas production due to long service life, the two outermost battery cells 1 squeeze the inner plates 32 on both sides respectively, so that the springs 33 of the two elastic clamping devices 3 shrink, thereby effectively compensating for the swollen size of the battery cell 1, ensuring that the size of the module is not deformed or damaged, and effectively extending the service life of the battery cell 1.

[0039] In this embodiment, the puncture cone 34 is provided on the outer plate 31, and one end thereof extends toward the inner plate 32. The inner plate 32 is provided with a through hole 321 for the puncture cone 34 to pass through, and the length of the puncture cone 34 is less than the length of the spring 33 in the naturally extended state. When multiple battery cells 1 are placed in the clamping area, the two inner plates 32 abut against the two outermost battery cells 1 respectively. In order to ensure the clamping force of the two elastic clamping devices 3 on the multiple battery cells 1, the two springs 33 will contract to a certain extent. A through hole 321 is provided on the inner plate 32, and the puncture cone 34 is provided on the outer plate 31, and one end thereof extends toward the inner plate 32. The length of the piercing cone 34 is set to be smaller than the length of the spring 33 in a naturally extended state. When the two elastic clamping devices 3 clamp the multiple battery cells 1, the spring 33 contracts to a certain extent, and the end of the piercing cone 34 extends toward the inner plate 32 or extends into the through hole 321, but does not penetrate the through hole 321, or does not extend into the through hole 321.

[0040] When the battery cell 1 is used for too long and the inside of the battery cell 1 swells due to gas production, the two outermost battery cells 1 squeeze the inner plates 32 on both sides respectively, causing the two springs 33 to further shrink. At this time, the end of the piercing cone 34 extending toward the inner plate 32 passes through the through hole 321 and fits with the pressure relief valve 2 on the side of the outermost battery cell 1; when the battery cell 1 swells further to the limit, the piercing cone 34 will actively pierce the pressure relief valve 2 on the side of the outermost battery cell 1, and release the pressure through the pressure relief valve 2 to perform active safety protection, further ensuring the safety of the module. The length of the piercing cone 34 and the spring 33 can be determined according to the actual production situation.

[0041] In this embodiment, there are two pressure relief valves 2 arranged on the side of the battery cell 1, two puncture cones 34 are arranged on the outer plate 31, and two through holes 321 are arranged on the inner plate 32. The two pressure relief valves 2 are arranged diagonally on the side of the battery cell 1, and the positions of the two puncture cones 34 and the two through holes 321 correspond to the two pressure relief valves 2. Two pressure relief valves 2 are arranged on the side of the battery cell 1, and the two pressure relief valves 2 are arranged diagonally on the side of the battery cell 1. When the battery cell 1 has severe thermal runaway, the two pressure relief valves 2 can quickly release the gas in the battery cell 1, thereby further ensuring the safety of the module.

[0042] Two puncture cones 34 are provided on the outer plate 31, and two through holes 321 are provided on the inner plate 32. The positions of the two puncture cones 34 and the two through holes 321 respectively correspond to the positions of the two pressure relief valves 2 on the side of the battery cell 1. Therefore, when the battery cell 1 further expands to the limit, the two puncture cones 34 will respectively penetrate the two through holes 321 to puncture the two pressure relief valves 2 on the side of the outermost battery cell 1, and active safety protection is performed by quickly releasing pressure through the two pressure relief valves 2, thereby further ensuring the safe use of the module.

[0043] In this embodiment, the outer plate 31 is provided with a cavity for loading a fire-fighting medium, and an exhaust hole 312 for discharging the fire-fighting medium in the cavity. The outer plate 31 is provided with a cavity and an exhaust hole 312, and the cavity is loaded with a fire-fighting medium. The exhaust hole 312 connects the cavity with the outside, so that when the battery cell 1 has a thermal runaway, the fire-fighting medium in the cavity is discharged through the exhaust hole 312, and the battery cell 1 is cooled to prevent the battery cell 1 from catching fire due to thermal runaway, thereby extinguishing the fire of the module and ensuring the safety of the module. In the present application, the fire-fighting medium can be liquid perfluorohexanone, which is discharged from the exhaust hole 312. After encountering the high-temperature gas, it can be quickly vaporized and dispersed in the battery pack and around the battery module, so as to achieve the purpose of effectively extinguishing the fire of the module and ensure the safety of the module.

[0044] In this embodiment, the inner plate 32 is provided with an air guide hole, and the outer plate 31 is also provided with an air inlet hole 311 that connects the cavity with the outside world, and the air guide hole is used to guide the gas released by the pressure relief valve 2 to the air inlet hole 311. The outer plate 31 is provided with an air inlet hole 311, and the inner plate 32 is provided with an air guide hole, and the air inlet hole 311 connects the cavity with the outside world, and the air guide hole guides the gas released by the pressure relief valve 2 to the air inlet hole 311. When the battery cell 1 has thermal runaway, the pressure relief valve 2 releases the gas in the battery cell 1, and the guide hole guides the released gas to the air inlet hole 311, and then enters the cavity of the outer plate 31 through the air inlet hole 311. Under the action of the gas pressure, the liquid perfluorohexanone in the cavity is discharged from the exhaust hole 312, and the module is extinguished.

[0045] In this embodiment, the central axes of the air guide hole, the spring 33 and the air inlet hole 311 are on the same straight line. Since the air guide hole is arranged on the inner plate 32, and the air inlet hole 311 is arranged on the outer plate 31, if no connecting pipe is arranged between the air guide hole and the air inlet hole 311, when the gas released by the pressure relief valve 2 is guided to the air inlet hole 311 through the guide hole, the flow of the gas between the inner plate 32 and the outer plate 31 is dispersed, which results in a relatively limited amount of gas guided from the guide hole to the air inlet hole 311, so that the liquid perfluorohexanone in the cavity of the outer plate 31 cannot be discharged from the exhaust hole 312 in time, and the module is extinguished.

[0046] Since the spring 33 will shrink to a certain extent when the two elastic clamping devices 3 clamp the multiple battery cells 1, in the present application, the central axes of the air guide hole, the spring 33 and the air inlet hole 311 are arranged on the same straight line, so that the gas released by the pressure relief valve 2 passes through the air guide hole and then passes through the spring 33. The shrinking spring 33 can play a certain guiding role on the gas, so that more gas can enter the air inlet hole 311, ensuring that the liquid perfluorohexanone in the cavity of the outer plate 31 can be discharged from the exhaust hole 312 in time to extinguish the fire of the module.

[0047] In this embodiment, the spring 33 is sleeved on the periphery of the puncturing cone 34 , the air inlet hole 311 is provided on the puncturing cone 34 , and the central axis of the air inlet hole 311 is in the same straight line as the central axis of the puncturing cone 34 . In order to allow more gas to enter the air inlet 311, the present application has another implementation method: the air inlet 311 is set on the puncture cone 34, and after the air inlet 311 penetrates the puncture cone 34 along the central axis of the puncture cone 34, the cavity of the outer plate 31 is connected with the outside. At this time, the through hole 321 for the puncture cone 34 to pierce is the air guide hole. The gas released by the pressure relief valve 2 passes through the through hole 321 and enters the air inlet 311, and then enters the cavity of the outer plate 31 through the air inlet 311. Since one end of the puncture cone 34 extends toward the direction of the inner plate 32, the puncture cone 34 is used as a conduit between the air guide hole and the cavity, which can enable the gas to enter the cavity better, thereby ensuring that the liquid perfluorohexanone in the cavity of the outer plate 31 can be discharged from the exhaust hole 312 in time to extinguish the fire of the module.

[0048] Compared with the previous embodiment, this embodiment has two advantages in addition to a better gas guiding effect: first, in this embodiment, the through hole 321 on the inner plate 32 for the puncture cone 34 to pass through is the same hole as the air guide hole for the gas released by the pressure relief valve 2 to pass through, thereby reducing the processing of the inner plate 32 and reducing production costs; second, in this embodiment, the spring 33 can be sleeved on the periphery of the puncture cone 34, so that the puncture cone 34 limits the spring 33 when it is extended and retracted, thereby preventing the spring 33 from having a large lateral deviation when it is extended and retracted, thereby affecting the clamping effect of the elastic clamping device 3 on the multiple battery cells 1.

[0049] In this embodiment, an explosion-proof valve 4 is provided at the bottom of each battery cell 1. When the battery cell 1 fails conventionally, the explosion-proof valve 4 at the bottom of the battery cell 1 is activated to release the pressure in an explosion-proof manner, thereby ensuring the safety of the battery cell 1; when the explosion-proof valve 4 at the bottom of the battery cell 1 fails or the battery cell 1 is violently out of control, the pressure relief valve 2 on the side of the battery cell 1 can quickly release the gas in the module. This dual explosion-proof design on the battery cell 1 further ensures the safety of the module.

[0050] In this embodiment, the fire fighting module further includes a tie 5 for tying the two elastic clamping devices 3 and the multiple battery cells 1 together. The fire fighting module further includes a tie 5. After the two elastic clamping devices 3 clamp the multiple battery cells 1, the two elastic clamping devices 3 and the multiple battery cells 1 are tied together by the tie 5, thereby further fixing the module and enhancing the stability of the module structure.

[0051] As mentioned in the previous article: When the battery cell 1 is used for too long, causing the inside of the battery cell 1 to swell due to gas production, the two outermost battery cells 1 respectively squeeze the inner plates 32 on both sides. At this time, the cable tie 5 binds the two outer plates 31 together, making it impossible for the two outer plates 31 to move away from each other, thereby compressing the spring 33 between the inner plate 32 and the outer plate 31, increasing the width of the clamping area, and effectively compensating for the swollen size of the battery cell 1, ensuring that the size of the module is not deformed or damaged, and effectively extending the service life of the battery cell 1.

[0052] It can be foreseen that the width of the outer plate 31 and the inner plate 32 is less than or equal to the width of the battery cell 1, so that when the cable tie 5 is used to tie the outer plates 31 of the two elastic clamping devices 3, the multiple battery cells 1 are also tied together. The cable tie 5 is used to limit the multiple battery cells 1, which can prevent the battery cells 1 from shifting to both sides during the transportation of the module, thereby affecting the use of the module. In this application, the cable tie 5 can be a metal cable tie or a cable tie made of other materials, depending on the specific production situation.

[0053] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present invention.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An elastically compressed self-puncturing fire-fighting module, characterized in that: The invention comprises a plurality of battery cells (1), a pressure relief valve (2) arranged on the side of the battery cells (1), and two elastic clamping devices (3) arranged on the outside of the plurality of battery cells (1); a clamping area is formed between the two elastic clamping devices (3) for clamping the plurality of battery cells (1); the width of the clamping area is adjustable; a piercing cone (34) is provided on the elastic clamping device (3) for piercing the pressure relief valve (2) on the side of the outermost battery cell (1); the elastic clamping device (3) comprises an outer plate (31), an inner plate (32), and a spring (33) arranged between the outer plate (31) and the inner plate (32); one end of the spring (33) is connected to the outer plate (31), and the other end is connected to the inner plate (32); the inner plate (32) ) abuts against the side surface of the outermost battery cell (1); the puncture cone (34) is arranged on the outer plate (31), and one end extends in the direction of the inner plate (32); the inner plate (32) is provided with a through hole (321) for the puncture cone (34) to pass through, and the length of the puncture cone (34) is less than the length of the spring (33) in a naturally extended state; the outer plate (31) is provided with a cavity for loading a fire-fighting medium, and an exhaust hole (312) for exhausting the fire-fighting medium in the cavity; the inner plate (32) is provided with an air guide hole, and the outer plate (31) is also provided with an air inlet hole (311) for connecting the cavity with the outside, and the air guide hole is used to guide the gas released by the pressure relief valve (2) to the air inlet hole (311).

2. The elastic compression self-puncturing fire fighting module as claimed in claim 1, characterized in that: The two pressure relief valves (2) are arranged on the side of the battery core (1), the two puncturing cones (34) are arranged on the outer plate (31), and the two through holes (321) are arranged on the inner plate (32). The two pressure relief valves (2) are arranged diagonally on the side of the battery core (1), and the positions of the two puncturing cones (34) and the two through holes (321) correspond to the two pressure relief valves (2), respectively.

3. The elastic compression self-puncturing fire fighting module as claimed in claim 1, characterized in that: The central axes of the air guide hole, the spring (33) and the air inlet hole (311) are on the same straight line.

4. The elastic compression self-puncturing fire fighting module as claimed in claim 1, characterized in that: The spring (33) is sleeved on the periphery of the puncturing cone (34), the air inlet hole (311) is provided on the puncturing cone (34), and the central axis of the air inlet hole (311) and the central axis of the puncturing cone (34) are on the same straight line.

5. The elastic compression self-puncturing fire fighting module as claimed in claim 1, characterized in that: An explosion-proof valve (4) is provided at the bottom of the battery cell (1).

6. The elastic compression self-puncturing fire fighting module as claimed in claim 1, characterized in that: The fire fighting module also includes a tie (5) for tying the two elastic pressing devices (3) and the plurality of battery cells (1) together.

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