Detection device and fire extinguishing system

Abstract

The present invention discloses a detection device, including a first mounting seat, a first emitting element, a second emitting element, a second mounting seat and a receiving element. The first emitting element and the second emitting element are both arranged on the first mounting seat, the first emitting element is used to emit detection light along the first direction, and the second emitting element is used to emit positioning light parallel to the detection light; the second mounting seat is arranged on the same side surface of the battery module with the first mounting seat at intervals along the first direction, and the second mounting seat is provided with a positioning channel through the first direction; the receiving element is arranged on the second mounting seat, and is used to receive the detection light. When the positioning light passes through the positioning channel, the receiving element can receive the detection light emitted by the first emitting element. Whether the battery module has thermal runaway can be judged by monitoring the change in the energy of the light received by the receiving element, which speeds up the detection speed, so that thermal runaway can be quickly suppressed to avoid the expansion of losses. The present invention also relates to a fire extinguishing system.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting equipment, and particularly to a detection device and a fire extinguishing system. Background Art

[0002] Lithium batteries have a risk of thermal runaway in the case of short circuit, overcharge, over-discharge, temperature overlimit, and mechanical damage. After thermal runaway occurs, a large amount of smoke will be generated. By placing a smoke sensor in the battery box to detect the smoke, it is possible to determine whether there is a battery with thermal runaway in the battery box.

[0003] However, currently the smoke sensor is fixed at a certain position in the battery box. When a battery far from the smoke sensor has a thermal runaway, the generated smoke needs to diffuse to the position where the smoke sensor is located before it can be detected by the smoke sensor. And the early smoke diffusion speed is slow, and it may be detected by the smoke sensor only in the stage where the thermal runaway occurs violently, resulting in an enlarged loss. Summary of the Invention

[0004] The object of the present invention is to provide a detection device and a fire extinguishing system that can quickly detect battery thermal runaway.

[0005] A detection device includes:

[0006] A first mounting seat;

[0007] A first emitter, arranged on the first mounting seat, for emitting detection light along a first direction;

[0008] A second emitter, arranged on the first mounting seat, for emitting positioning light parallel to the detection light;

[0009] A second mounting seat, arranged at an interval from the first mounting seat along the first direction on the same side surface of the battery module, and the second mounting seat is provided with a positioning channel penetrating along the first direction; and

[0010] A receiver, arranged on the second mounting seat, for receiving the detection light;

[0011] Wherein, when the positioning light passes through the positioning channel, the receiver can receive the detection light emitted by the first emitter.

[0012] By arranging the above-mentioned detection device, the first mounting seat and the second mounting seat are arranged at intervals on the same side surface of the battery module. During the installation process, it is ensured that the positioning light passes through the positioning channel, so as to ensure that the receiving part can receive the detection light. When the battery module undergoes thermal runaway, the smoke generated in the battery module overflows from the battery module and enters the space between the first mounting seat and the second mounting seat. Part of the detection light will be lost due to the blockage and scattering of the smoke, and the light energy received by the receiving part will decrease. Continuing thermal runaway of the battery module will cause excessive internal pressure, resulting in bulging on the surface of the battery module. The bulge may be located between the first mounting seat and the second mounting seat, further blocking the detection light, or the bulge will cause the first mounting seat and / or the second mounting seat to tilt, so that the second mounting seat cannot directly receive the detection light. In this way, when the battery module undergoes thermal runaway, by directly arranging the first mounting seat and the second mounting seat on the surface of the battery module and then monitoring the light energy received by the receiving part, it is possible to determine whether the battery module has undergone thermal runaway based on the light energy received by the receiving part, without waiting for the smoke generated by the battery module to spread to the installation position of the smoke sensor, effectively accelerating the speed of detecting thermal runaway of the battery module, so as to quickly suppress thermal runaway and avoid the expansion of losses.

[0013] In one embodiment, the detection device further includes a control switch, which is arranged on the first mounting seat and electrically connected to the second emitter for controlling the opening and closing of the second emitter.

[0014] In one embodiment, the detection device further includes a first circuit board, which is arranged on

[0015] the first mounting seat, and the first emitter, the second emitter and the control switch are all arranged on the first circuit board and are all electrically connected to the first circuit board.

[0016] In one embodiment, the second emitter is a laser emitter.

[0017] In one embodiment, the detection device further includes a first level gauge and a second level gauge. The first level gauge is arranged on the first mounting seat, and the second level gauge is arranged on the second mounting seat.

[0018] In one embodiment, the first mounting seat has a first mounting cavity, a first opening and a second opening communicating with the first mounting cavity. The first emitter and the second emitter are both arranged in the first mounting cavity. The first opening and the second opening are located on the same side of the first mounting seat. The first opening is used for the detection light emitted by the first emitter to pass through, and the second opening is used for the positioning light emitted by the second emitter to pass through.

[0019] In one embodiment, the first mounting seat includes a first housing and a first cover. The first housing has a first open cavity. Both the first emitting member and the second emitting member are disposed in the first open cavity. The first cover is mounted at the opening of the first open cavity to enclose the first mounting cavity with the first open cavity. The first opening and the second opening are both formed in the first cover.

[0020] In one embodiment, the second mounting seat has a second mounting cavity, and a third opening, a fourth opening, and a fifth opening that communicate with the second mounting cavity. The receiving member is disposed in the second mounting cavity. The third opening corresponds to the receiving member in the first direction. The third opening is for allowing the detection light to pass through. The third opening and the fourth opening are located on the same side of the second mounting seat. The fourth opening and the fifth opening are located on opposite sides of the second mounting seat along the first direction, and the fourth opening and the fifth opening are coaxially arranged. The fourth opening, the second mounting cavity, and the fifth opening communicate with each other to jointly form the positioning channel.

[0021] A detection device, comprising:

[0022] A first mounting seat;

[0023] A first emitting member, disposed on the first mounting seat, for emitting detection light along a first direction;

[0024] A second emitting member, disposed on the first mounting seat, for emitting positioning light parallel to the detection light

[0025] light;

[0026] A second mounting seat, spaced apart from the first mounting seat along the first direction and disposed on the same side surface of the battery module;

[0027] A first receiving member, disposed on the second mounting seat, for receiving the detection light; and

[0028] A second receiving member, disposed on the second mounting seat, for receiving the positioning light;

[0029] Wherein, when the second receiving member can receive the positioning light, the first receiving member can receive the detection light emitted by the first emitting member.

[0030] A fire extinguishing system, comprising the above detection device. Description of the Drawings

[0031] Figure 1 It is a schematic installation diagram of the detection device provided by an embodiment of the present invention and the battery module;

[0032] Figure 2 The Figure 1 exploded schematic diagram of the first mounting base of the detection device shown and the components arranged on the first mounting base;

[0033] Figure 3 The Figure 1 exploded schematic diagram of the second mounting base of the detection device shown and the components arranged on the second mounting base;

[0034] Figure 4 is the schematic diagram of the principle that when the battery module has a thermal runaway, the smoke overflows between the first mounting base and the second mounting base;

[0035] Figure 5 is the schematic diagram of the principle that when the battery module has a thermal runaway and bulges between the first mounting base and the second mounting base;

[0036] Figure 6 is the schematic diagram of the principle that when the battery module has a thermal runaway and bulges, causing the first mounting base and the second mounting base to tilt;

[0037] Figure 7 is the schematic diagram of the structure of the fire extinguishing system provided by another embodiment of the present invention.

[0038] Reference numerals:

[0039] 10. First mounting base; 11. First opening; 12. Second opening; 13. First housing; 14. First cover; 15. First open cavity; 16. First mounting opening; 21. First emitter; 22. Second emitter; 23. Receiver; 24. Detection light; 25. Control switch; 30. Second mounting base; 31. Third opening; 32. Fourth opening; 33. Second housing; 34. Second cover; 35. Second open cavity; 36. Second mounting opening; 40. First circuit board; 50. Second circuit board; 51. Sixth opening; 61. First level;

[0040] 62. Second level; 70. Controller; 80. Wire;

[0041] 200. Battery module; 300. Fire extinguishing device. Detailed implementation manners

[0042] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0045] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0047] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other

[0048] There may also be a centered component on a component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be intermediate components present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0049] As Figures 1 to 3 shown, a detection device provided by an embodiment of the present invention includes a first mounting base 10, a first transmitting member 21, a second transmitting member 22, a second mounting base 30 and a receiving member 23.

[0050] Both the first transmitting member 21 and the second transmitting member 22 are disposed on the first mounting base 10. The first transmitting member 21 is used to emit a detection light beam 24 along a first direction, and the second transmitting member 22 is used to emit a positioning light beam parallel to the detection light beam 24.

[0051] The second mounting base 30 is spaced from the first mounting base 10 along the first direction on the same side surface of the battery module 200. The second mounting base 30 is provided with a positioning channel penetrating therethrough along the first direction.

[0052] The receiving member 23 is disposed on the second mounting base 30 and is used to receive the detection light beam 24.

[0053] When the positioning light beam passes through the positioning channel, the receiving member 23 can receive the detection light beam 24 emitted by the first transmitting member 21.

[0054] Wherein, the first direction is Figure 1 the left-right direction in . Specifically, the first direction is parallel to the surface on which the first mounting base 10 and the second mounting base 30 are normally mounted on the battery module 200.

[0055] Please also refer to Figures 4 to 6 , by arranging the above-mentioned detection device, the first mounting base 10 and the second mounting base 30 are spaced on the same side surface of the battery module 200, and it is ensured that the positioning light beam passes through the positioning channel during the installation process, so as to ensure that the receiving member 23 can receive the detection light beam 24.

[0056] When the battery module 200 undergoes thermal runaway, since the first mounting seat 10 and the second mounting seat 30 are directly mounted on the battery module 200, the smoke generated inside the battery module 200 will directly enter the space between the first mounting seat 10 and the second mounting seat 30 after overflowing from the battery module 200. Part of the detection light 24 will be lost due to the obstruction and scattering of the smoke, and the light energy received by the receiving member 23 will decrease. Since the continuous thermal runaway of the battery module 200 will cause excessive internal pressure, the surface of the battery module 200 will bulge. The bulge may be located between the first mounting seat 10 and the second mounting seat 30, further blocking the detection light 24, or the bulge will cause the first mounting seat 10 and / or the second mounting seat 30 to tilt, so that the second mounting seat 30 cannot directly receive the detection light 24.

[0057] In this way, the first mounting seat 10 and the second mounting seat 30 can be directly arranged on the surface of the battery module 200, and then the light energy received by the receiving member 23 is monitored. Whether the battery module 200 undergoes thermal runaway is judged by the change in the light energy received by the receiving member 23, without waiting for the smoke generated by the battery module 200 to spread to the installation position of the smoke sensor, effectively accelerating the speed of detecting the thermal runaway of the battery module 200, so that thermal runaway suppression can be carried out quickly and the expansion of losses can be avoided.

[0058] It should be noted that since the positioning channel penetrates through the second mounting seat 30, a flat plate can be placed on the side of the second mounting seat 30 away from the first mounting seat 10. By observing whether the positioning light passes through the positioning channel and irradiates on the flat plate, or directly observing the inner wall of the battery box, the relative positions of the first mounting seat 10 and the second mounting seat 30 can be determined to ensure that the receiving member 23 can receive the detection light 24.

[0059] At the same time, in order to improve the detection accuracy, the first mounting seat 10 and the second mounting seat 30 are generally installed at opposite ends on the same side surface of the battery module 200. In this way, the path of the detection light 24 is longer. When there is smoke, more light is blocked and scattered, and the decrease in the light energy received by the receiving member 23 is more obvious.

[0060] Figure 4 In the illustrated embodiment, the smoke generated by the battery module 200 overflows and enters the space between the first mounting seat 10 and the second mounting seat 30; Figure 5 In the illustrated embodiment, the battery module 200 bulges, and the bulge is located between the first mounting seat 10 and the second

[0061] mounting seat 30; Figure 6 In the illustrated embodiment, the battery module 200 bulges more, and the bulge causes the first mounting seat 10 and

[0062] the second mounting seat 30 to tilt.

[0063] In addition, it can be understood that the first mounting seat 10 and the second mounting seat 30 can be mounted on the side surface of the battery module 200 where smoke is likely to overflow and where bulging is likely to occur.

[0064] Please refer to Figure 1 and Figure 2 , in some embodiments, the first mounting seat 10 has a first mounting cavity, a first opening 11 and a second opening 12 that communicate with the first mounting cavity. Both the first emitter 21 and the second emitter 22 are disposed in the first mounting cavity. The first opening 11 and the second opening 12 are located on the same side of the first mounting seat 10. The first opening 11 is for the detection light 24 emitted by the first emitter 21 to pass through, and the second opening 12 is for the positioning light emitted by the second emitter 22 to pass through. In this way, the first emitter 21 and the second emitter 22 can be protected by the first mounting seat 10.

[0065] In some embodiments, the first mounting seat 10 includes a first housing 13 and a first cover 14. The first housing 13 has a first open cavity 15. Both the first emitter 21 and the second emitter 22 are disposed in the open cavity. The first cover 14 is installed at the opening of the first open cavity 15 to enclose the first open cavity 15 to form a first mounting cavity with the first open cavity 15. The first opening 11 and the second opening 12 are both opened on the first cover 14.

[0066] It should be noted that the open cavity is a non-closed cavity with an opening. The opening of the open cavity is closed by the first cover 14, which is convenient for connecting the first cover 14 to the first housing 13 after the first emitter 21 and the second emitter 22 are installed.

[0067] In some embodiments, the detection device further includes a first circuit board 40. The first circuit board 40 is disposed on the first mounting seat 10, and both the first emitter 21 and the second emitter 22 are disposed on the first circuit board 40 and are electrically connected to the first circuit board 40.

[0068] In practical applications, the first circuit board 40 is installed in the first mounting cavity, and the first emitter 21 and the second emitter 22 are located on the side of the first circuit board 40 facing the first cover 14.

[0069] In some embodiments, the detection device further includes a control switch 25. The control switch 25 is disposed on the first mounting seat 10 and is electrically connected to the second emitter 22 for controlling the on and off of the second emitter 22.

[0070] It should be noted that the second emitter 22 is mainly used to position the relative positions of the first mounting seat 10 and the second mounting seat 30 to ensure accurate installation and guarantee that the receiver 23 can receive the detection light 24. After the installation is completed, the second emitter 22 can be turned off, thus no longer consuming power and extending the service life of the first emitter 21.

[0071] In practical applications, the control switch 25 is arranged on the first circuit board 40 and is electrically connected to the first circuit board 40.

[0072] In some embodiments, the first emitter 21 is a laser emitter or an infrared emitter, the second emitter 22 is a laser emitter, and the corresponding receiver 23 is a laser receiver or an infrared receiver.

[0073] Please refer to Figure 1 and Figure 3 , in some embodiments, the second mounting seat 30 has a second mounting cavity and a third opening 31, a fourth opening 32, and a fifth opening that communicate with the second mounting cavity. The receiver 23 is arranged in the second mounting cavity. The third opening 31 corresponds to the receiver 23 in the first direction, and the third opening 31 is used for the detection light 24 to pass through. The third opening 31 and the fourth opening 32 are located on the same side of the second mounting seat 30. The fourth opening 32 and the fifth opening are located on opposite sides of the second mounting seat 30 along the first direction, and the fourth opening 32 and the fifth opening are coaxially arranged. The fourth opening 32, the second mounting cavity, and the fifth opening communicate with each other to jointly form a positioning channel.

[0074] It should be noted that the second mounting cavity, the fourth opening 32, and the fifth opening communicate with each other to jointly form a positioning channel, which can be understood as the positioning channel passing through the second mounting cavity.

[0075] In some embodiments, the second mounting seat 30 includes a second housing 33 and a second cover 34. The second housing 33 has a second open cavity 35. The receiver 23 is arranged in the second open cavity 35. The second cover 34 is installed at the opening of the second open cavity 35

[0076] to enclose the second open cavity 35 to form the second mounting cavity together. The third opening 31 and the fourth opening 32 are both opened on the second cover

[0077] body 34, and the fifth opening is opened on the side of the second housing 33 opposite to the second cover 34.

[0078] In some embodiments, the detection device further includes a second circuit board 50. The second circuit board 50 is arranged on the second mounting seat 30. The receiver 23 is arranged on the second circuit board 50 and is electrically connected to the second circuit board 50.

[0079] In practical applications, the second circuit board 50 is disposed in the second installation cavity, and the receiving member 23 is located on the side of the second circuit board 50 facing the second cover body 34.

[0080] In addition, it can be understood that in order to ensure that the positioning light can pass through the second mounting seat 30, a sixth opening 51 can be opened on the second circuit board 50 as shown in Figure 3 . The fourth opening 32, the sixth opening 51, and the fifth opening are coaxial. It is also possible to reduce the size of the second circuit board 50 to prevent the second circuit board 50 from blocking the positioning light.

[0081] In some embodiments, the detection device further includes a first level 61 and a second level 62. The first level 61 is disposed on the first mounting seat 10, and the second level 62 is disposed on the second mounting seat 30, which is used to conveniently observe whether the first mounting seat 10 and the second mounting seat 30 are both kept horizontal during installation.

[0082] Combined with Figure 1 It should be explained that when the first mounting seat 10 and the second mounting seat 30 are installed, the first mounting seat 10 can be installed first, and the first mounting seat 10 is fixed when the first level 61 shows horizontal. Then, the second mounting seat 30 is installed, and the second mounting seat 30 is fixed when the second level 62 shows horizontal and the positioning light passes through the positioning channel.

[0083] In addition, the first mounting seat 10 and the second mounting seat 30 are installed on the side of the battery module 200.

[0084] In practical applications, the first housing 13 is provided with a first mounting opening 16 communicating with the first open cavity 15. The first mounting opening 16 is located on the surface of the first housing 13 adjacent to the opening. The first level 61 is installed in the first mounting opening 16. The second housing 33 is provided with a second mounting opening 36 communicating with the second open cavity 35. The second mounting opening 36 is located on the surface of the second housing 33 adjacent to the opening. The second level 62 is installed in the second mounting opening 36.

[0085] In some embodiments, the detection device further includes a controller 70 (please refer to Figure 7 ). The controller 70 is electrically connected to the first circuit board 40 and the second circuit board 50 at the same time, so as to be electrically connected to the first transmitting member 21 and the receiving member 23 through the first circuit board 40 and the second circuit board 50 at the same time.

[0086] It should be noted that the controller 70 can also be electrically connected to the second transmitting member 22, which is not limited herein.

[0087] In practical applications, both the first housing 13 and the second housing 33 are provided with connection holes for the wire 80 to pass through. One end of the two wires 80 is electrically connected to the controller 70 at the same time, and the other ends respectively pass through the connection holes of the first housing 13 and the second housing 33 to be electrically connected to the first circuit board 40 and the second circuit board 50 respectively.

[0088] In some other embodiments, there may be two receiving members 23, namely a first receiving member and a second receiving member. Both the first receiving member and the second receiving member are disposed on the second mounting base 30. The first receiving member is used to receive the detection light 24, and the second receiving member is used to receive the positioning light.

[0089] When the second receiving member receives the positioning light, the first receiving member can receive the detection light 24 emitted by the first emitter 21.

[0090] It can be understood that in this embodiment, the function of the second receiving member is equivalent to that of the positioning channel and the flat plate. That is, when using the positioning channel, a flat plate is provided on the side of the second mounting base 30 away from the first mounting base 10, and it can be observed whether the positioning light passing through the positioning channel is received on the flat plate; while in this embodiment, it can be directly observed whether the second receiving member receives the positioning light.

[0091] In addition, when using the second receiving member, the third opening 31 and the fourth opening 32 need to be opened, while the fifth opening and the sixth opening 51 do not need to be opened.

[0092] In some embodiments, the second receiving member is disposed on the second circuit board 50 and is electrically connected to the controller 70,

[0093] so that it can be judged by the controller 70 whether the second receiving member receives the positioning light.

[0094] Of course, a prism can also be used as the second receiving member. When the positioning light irradiates the second receiving member, the positioning light will be split and dispersed, so as to be observed by the operator.

[0095] A fire extinguishing system includes the detection device in the above embodiments.

[0096] Please refer to Figure 7 , in some embodiments, the fire extinguishing system further includes a fire extinguishing device 300. The fire extinguishing device 300 is electrically connected to the controller 70. The controller 70 controls the fire extinguishing device 300 to spray the fire extinguishing agent into the battery box according to the detection information of the detection device.

[0097] It should be explained that the controller 70 controls the first emitter 21 to emit the detection light 24, and at the same time can also calculate the light energy received by the receiving member 23 to judge whether the battery module 200 has a thermal runaway.

[0098] In some embodiments, the detection device includes a plurality of first mounting seats 10, a plurality of second mounting seats 30, a plurality of first transmitting members 21, a plurality of second transmitting members 22, and a plurality of receiving members 23 to simultaneously detect a plurality of battery modules 200.

[0099] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0100] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A detection device, characterized in that, Comprising: A first mounting base; A first emitter, disposed on the first mounting base, for emitting detection light in a first direction; A second emitter, disposed on the first mounting base, for emitting positioning light parallel to the detection light; A second mounting base, spaced from the first mounting base along the first direction on the same side surface of the battery module, the second mounting base being provided with a positioning channel penetrating therethrough along the first direction; And a receiver, disposed on the second mounting base, for receiving the detection light; Wherein, when the positioning light passes through the positioning channel, the receiver can receive the detection light emitted by the first emitter; The first mounting base has a first mounting cavity, a first opening and a second opening communicating with the first mounting cavity, the first emitter and the second emitter are both disposed in the first mounting cavity, the first opening and the second opening are located on the same side of the first mounting base, the first opening is for the detection light emitted by the first emitter to pass through, and the second opening is for the positioning light emitted by the second emitter to pass through; The positioning channel penetrates through the second mounting base, and a flat plate is placed on the side of the second mounting base away from the first mounting base to observe whether the positioning light passes through the positioning channel and irradiates on the flat plate.

2. The detection device according to claim 1, characterized in that, The detection device further includes a control switch, the control switch is disposed on the first mounting base and is electrically connected to the second emitter for controlling the opening and closing of the second emitter.

3. The detection device according to claim 2, characterized in that, The detection device further includes a first circuit board, the first circuit board is disposed on the first mounting base, and the first emitter, the second emitter and the control switch are all disposed on the first circuit board and are all electrically connected to the first circuit board.

4. The detection device according to claim 1, characterized in that, The second emitter is a laser emitter.

5. The detection device according to claim 1, characterized in that, The detection device further includes a first level and a second level, the first level is disposed on the first mounting base, and the second level is disposed on the second mounting base.

6. The detection device according to claim 1, characterized in that, The first mounting base includes a first housing and a first cover, the first housing has a first open cavity, the first emitter and the second emitter are both disposed in the first open cavity, and the first cover is installed at the opening of the first open cavity to enclose the first mounting cavity with the first open cavity, and the first opening and the second opening are both opened on the first cover.

7. The detection device according to claim 1, characterized in that, The second mounting base has a second mounting cavity, a third opening, a fourth opening and a fifth opening communicating with the second mounting cavity, the receiver is disposed in the second mounting cavity, the third opening corresponds to the receiver in the first direction, the third opening is for the detection light to pass through, the third opening and the fourth opening are located on the same side of the second mounting base, the fourth opening and the fifth opening are located on opposite sides of the second mounting base along the first direction, and the fourth opening and the fifth opening are coaxially arranged, and the fourth opening, the second mounting cavity and the fifth opening communicate with each other to jointly form the positioning channel.

8. A detection device, characterized in that, Comprising: A first mounting base; The first emitter is disposed on the first mounting seat and is configured to emit detection light in a first direction; The second emitter is disposed on the first mounting seat and is configured to emit positioning light parallel to the detection light; The second mounting seat is disposed on the same side surface of the battery module at an interval from the first mounting seat along the first direction; The first receiver is disposed on the second mounting seat and is configured to receive the detection light; and the second receiver is disposed on the second mounting seat and is configured to receive the positioning light; Wherein, when the second receiver can receive the positioning light, the first receiver can receive the detection light emitted by the first emitter; The first mounting seat has a first mounting cavity, a first opening and a second opening communicating with the first mounting cavity. The first emitter and the second emitter are both disposed in the first mounting cavity. The first opening and the second opening are located on the same side of the first mounting seat. The first opening is for the detection light emitted by the first emitter to pass through, and the second opening is for the positioning light emitted by the second emitter to pass through; The positioning channel penetrates through the second mounting seat. A flat plate is placed on the side of the second mounting seat away from the first mounting seat to observe whether the positioning light passes through the positioning channel and irradiates the flat plate.

9. A fire extinguishing system, characterized in that, Comprising the detection device according to any one of claims 1-8.

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