Smoke monitoring and releasing device and battery pack

Abstract

The invention provides a smoke monitoring and releasing device and a battery pack, and belongs to the technical field of smoke evacuation, and the smoke monitoring and releasing device comprises a smoke monitoring controller which is arranged in a battery box so as to monitor the smoke gas concentration in the battery box; the gas leading-out assembly is used for being arranged on the outer wall of the battery box and comprises a receiving part and a releasing part which are communicated with each other, and the releasing part is used for discharging smoke to the outside; the smoke transmission part is arranged on the side wall of the battery box in a penetrating mode and used for being communicated with the interior of the battery box and the gas guiding-out assembly, at least one discharging cavity is formed in the smoke transmission part, at least one receiving cavity is formed in the receiving part, and the smoke monitoring controller is in transmission connection with the smoke transmission part so as to change the area of an overlapping area between the discharging cavity and the receiving cavity. The device has the advantages that the position of the smoke transmission piece is changed (rotated or relatively linearly moved) relative to the gas leading-out assembly, and the overlapping area between the exhaust cavity and the receiving cavity is dynamically adjusted, so that the effective circulation sectional area of the gas leading-out channel is continuously variable.

Description

Technical Field

[0001] This invention belongs to the field of smoke extraction technology, and particularly relates to a smoke monitoring and release device and a battery pack. Background Technology

[0002] As the core power source of electric vehicles, the safety of the power battery is directly related to the overall vehicle operation safety and the safety of passengers' lives and property. Among many safety indicators, thermal runaway performance is a key factor in evaluating the safety of power batteries. When a battery experiences thermal runaway due to overcharging, internal short circuits, mechanical damage, or high-temperature environments, a violent exothermic chemical reaction occurs inside the cell, rapidly generating a large amount of high-temperature smoke and gas. This causes a sharp increase in internal pressure and a continuous rise in temperature, which can easily ignite flammable gases or trigger a chain reaction in adjacent cells, ultimately leading to a fire or even an explosion, seriously threatening vehicle safety.

[0003] Currently, thermal runaway protection for pouch batteries typically relies on fixed exhaust channels or one-time membrane-breaking pressure relief structures to expel accumulated fumes and gases to the external environment. However, the cross-sectional area of ​​these exhaust channels is fixed and cannot be dynamically adjusted according to different stages of thermal runaway. In the early stages of thermal runaway, when only a small amount of fumes and gases are generated, the fixed channels remain fully open, easily leading to backflow of external air and increasing the risk of oxidation. In the more severe stages of thermal runaway, the gas generation rate increases dramatically, and the flow capacity of the fixed channels is often insufficient to effectively relieve pressure in a timely manner. This causes the internal pressure of the battery to rise rapidly, exacerbating the risk of casing bulging and rupture, and potentially inducing fire or explosion. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a release device that dynamically adjusts the exhaust gas concentration within a battery pack in real time.

[0005] The objective of this invention can be achieved through the following technical solution: a smoke monitoring and emission device, comprising:

[0006] A smoke monitoring controller is installed inside the battery compartment to monitor the concentration of smoke gas inside the battery compartment;

[0007] A gas exhaust assembly, which is installed on the outer wall of the battery box, includes a receiving part and a releasing part connected in communication, the releasing part being used to exhaust smoke to the outside;

[0008] A smoke transmission device is installed through the side wall of the battery box to connect the inside of the battery box with the gas exhaust assembly. The smoke transmission device is provided with at least one exhaust chamber, and the receiving part is provided with at least one receiving chamber. The smoke monitoring controller is drivenly connected to the smoke transmission device and is used to control the position of the smoke transmission device relative to the receiving part to change the overlapping area between the exhaust chamber and the receiving chamber.

[0009] In the aforementioned smoke monitoring and release device, the receiving part includes a socket, the receiving cavity is distributed on the inner sidewall of the socket, the smoke transmission component includes a hollow transmission rod with one end inserted into the socket, the discharge cavity is distributed on the sidewall of the end of the transmission rod, and the transmission rod can change position relative to the receiving part.

[0010] In the aforementioned smoke monitoring and release device, the transmission rod is rotatably connected to the battery box and is capable of rotating relative to the receiving part about its axis.

[0011] In the aforementioned smoke monitoring and release device, a mounting shell is further included, which is fixedly installed inside a battery box. The mounting shell has a mounting cavity with an opening at one end, which is connected to the internal space of the battery box. The other end of the transmission rod extends into the mounting cavity. A track groove is provided on the shell wall of the mounting shell, and a sliding part that can reciprocate along the track groove is provided in the track groove. The sliding part is drivenly connected to the smoke monitoring controller, and a transmission unit is provided between the sliding part and the transmission rod.

[0012] In the aforementioned smoke monitoring and release device, a connecting part is fixedly provided on the sliding part, and the transmission unit includes a transmission part fixedly provided on the transmission rod. The transmission part is provided with a transmission groove extending in a straight line. The connecting part is disposed in the transmission groove and can move along it. The extension direction of the transmission groove is perpendicular to the axis of the transmission rod. As the connecting part moves in the transmission groove, it drives the transmission rod to rotate relative to the receiving part.

[0013] In the aforementioned smoke monitoring and release device, the extension direction of the trajectory groove is parallel to the axial direction of the mounting housing, and the opening of the mounting housing is located at one of its axial ends.

[0014] In the smoke monitoring and release device described above, there are two track slots, which are arranged in parallel and connected by two connecting slots to form a rectangular frame slot. The sliding part can move within the rectangular frame slot.

[0015] In the aforementioned smoke monitoring and release device, an inner rotating frame is rotatably arranged inside the mounting cavity. The smoke controller includes a driving unit, which is fixed to the inner rotating frame and is used to drive the inner rotating module to rotate around its axis and move axially. The connecting part and the sliding part are respectively arranged on the inner and outer sides of the inner rotating module.

[0016] In the aforementioned smoke monitoring and release device, the release part includes a release block with a release cavity inside, and a release port connected to the release cavity on the release block; a flow-gathering part is provided inside the release cavity, and a connecting hole connected to the receiving cavity is provided on the flow-gathering part; the flow cross-section of the flow-gathering part gradually narrows towards the release port to guide the smoke to the release port.

[0017] A battery pack including the aforementioned smoke monitoring and release device.

[0018] Compared with existing technologies, the advantages of this invention are as follows: By integrating the smoke monitoring controller inside the battery box, the smoke gas concentration is monitored in real time, and a linkage mechanism is formed with the smoke transmission component. This mechanism drives the smoke transmission component to change its position relative to the gas exhaust component (rotation or relative linear movement), thereby dynamically adjusting the overlap area between the exhaust chamber and the receiving chamber, achieving a continuously variable effective flow cross-sectional area for the gas exhaust channel. When the battery is in a normal state or when a small amount of smoke is generated due to slight heating, the exhaust chamber and the receiving chamber are partially overlapped to maintain a small flow rate of exhaust, avoiding sudden pressure changes and interference from the external environment. When a rapid increase in smoke concentration is detected, the smoke monitoring controller drives the smoke transmission component to move, aligning more of the exhaust chamber with the receiving chamber or increasing the overlap area, rapidly improving the exhaust capacity, effectively releasing internally accumulated gas, suppressing pressure rise, and preventing the spread of thermal runaway. Attached Figure Description

[0019] Figure 1 This is a 3D structural diagram of the battery pack;

[0020] Figure 2 yes Figure 1 Internal structure diagram;

[0021] Figure 3 This is a three-dimensional structural diagram of a smoke monitoring and emission device;

[0022] Figure 4 yes Figure 3 A schematic diagram of the exploded structure;

[0023] Figure 5 yes Figure 4 A three-dimensional structural diagram of the internally rotating frame;

[0024] Figure 6 This is a schematic diagram of the smoke transmission component;

[0025] Figure 7 yes Figure 3 Another perspective illustration;

[0026] Figure 8 This is a schematic diagram of the gas extraction component;

[0027] Figure 9 This is a schematic diagram showing the connection between the gas extraction component and the smoke transmission component;

[0028] Figure 10 This is a schematic diagram of the internal structure of the release section;

[0029] Figure 11 yes Figure 10 A schematic diagram of the exploded structure;

[0030] Figure 12 yes Figure 11 A magnified view of a portion of point A in the middle;

[0031] Figure 13 This is a schematic diagram showing the state of the transmission rod after it has been rotated and adjusted relative to the receiving part.

[0032] Figure 14 This is a schematic diagram showing the state after the transmission rod has been rotated and adjusted relative to the receiving part.

[0033] In the diagram, 100 is the smoke monitoring controller; 101 is the drive unit; 200 is the gas exhaust assembly; 201 is the receiving unit; 202 is the release unit; 203 is the receiving cavity; 204 is the socket; 205 is the release cavity; 206 is the release port; 207 is the flow convergence unit; 208 is the connecting hole; 209 is the outer cover; 210 is the fixing bracket; 211 is the pressure ring; 300 is the smoke transmission component; 301 is the exhaust cavity; 302 is the transmission rod; 303 is the transmission unit; 304 is the transmission groove; 305 is the transmission rod; 400 is the mounting shell; 401 is the mounting part; 402 is the mounting cavity; 403 is the track groove; 404 is the sliding part; 405 is the connecting part; 406 is the connecting groove; 407 is the slide plate; 408 is the inner rotating frame; and 500 is the battery box. Detailed Implementation

[0034] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0036] like Figures 1-14 As shown, a smoke monitoring and emission device includes:

[0037] A smoke monitoring controller 100 is installed inside the battery box 500 to monitor the concentration of smoke gas inside the battery box 500.

[0038] Gas exhaust assembly 200 is installed on the outer wall of battery box 500 and includes a receiving part 201 and a releasing part 202 connected in communication. The releasing part 202 is used to exhaust smoke to the outside.

[0039] A smoke transmission device 300 is installed through the side wall of the battery box 500 to connect the interior of the battery box 500 with the gas outlet assembly 200. The smoke transmission device 300 is provided with at least one exhaust chamber 301, and the receiving part 201 is provided with at least one receiving chamber 203. The smoke monitoring controller 100 is drivenly connected to the smoke transmission device 300 and is used to control the position of the smoke transmission device 300 relative to the receiving part 201 to change the overlapping area between the exhaust chamber 301 and the receiving chamber 203.

[0040] The smoke monitoring and release device provided by this invention integrates a smoke monitoring controller 100 inside the battery box 500 to monitor the smoke gas concentration in real time. It also forms a linkage mechanism with the smoke transmission component 300, driving the smoke transmission component 300 to change its position relative to the gas outlet component 200 (rotation or relative linear movement), thereby dynamically adjusting the overlap area between the exhaust chamber 301 and the receiving chamber 203. This allows for a continuously variable effective flow cross-sectional area of ​​the gas outlet channel. When the battery is in normal condition or slightly heated, producing a small amount of smoke, the exhaust chamber 301 and the receiving chamber 203 are partially overlapped to maintain a small flow rate of exhaust gas, avoiding sudden pressure changes and interference from the external environment. When a rapid increase in smoke concentration is detected, the controller drives the smoke transmission component 300 to move, aligning more of the exhaust chamber 301 with the receiving chamber 203 or increasing the overlap area, rapidly improving exhaust capacity, effectively releasing internally accumulated gas, suppressing pressure rise, and preventing the spread of thermal runaway.

[0041] like Figures 6-8As shown, further defined, the receiving part 201 includes an insertion hole 204, and the receiving cavity 203 is distributed on the inner side wall of the insertion hole 204. The smoke transmission component 300 includes a hollow transmission rod 302, one end of which is inserted into the insertion hole 204. The transmission rod 302 and the receiving part 201 are connected by a plug-in method, which facilitates modular installation and replacement during the production or maintenance of the battery box 500, improving assembly efficiency. The insertion hole 204 and the end of the transmission rod 302 form a tightly fitting annular contact surface. Combined with O-rings or other sealing methods, it can effectively prevent smoke gas from leaking from non-channel areas during dynamic adjustment. The discharge cavity 301 is distributed on the side wall of the end of the transmission rod 302. When the transmission rod 302 can change its position relative to the receiving part 201 (such as rotating or axially moving), the overlapping area of ​​the cavities between the two can be continuously or steppedly changed, thereby precisely controlling the gas flow cross-sectional area.

[0042] By rationally designing the number, shape, and distribution angle of the discharge chamber 301 and the receiving chamber 203, multiple exhaust modes can be achieved to meet the pressure release requirements of different thermal runaway development stages.

[0043] Specifically, the transmission rod 302 is rotatably connected to the battery box 500 and can rotate relative to the receiving part 201 about its axis. By controlling the rotation angle of the transmission rod 302, the overlap area between the discharge cavity 301 on its end side wall and the receiving cavity 203 on the inner wall of the socket 204 can be precisely adjusted. As the rotation angle changes, the cross-sectional area of ​​the gas flow channel can continuously change from completely closed, partially overlapping to fully aligned, thereby dynamically and on demand adjusting the exhaust flow rate according to the smoke concentration and pressure development trend detected in real time by the smoke monitoring controller 100.

[0044] Compared to linear reciprocating motion, which is prone to problems such as uneven loading and jamming, rotary motion distributes force evenly and can operate stably for a long time in battery operating environments with high temperature, high humidity and slight vibration. It supports repeated start-up and reset operations, improving the service life and maintainability of the device.

[0045] The rotatable connection between the transmission rod 302 and the battery box 500 can be achieved by setting a rotary seal (such as a lip seal or mechanical seal) to effectively block the path of smoke gas leaking outward along the rod while ensuring free rotation, ensuring that all gas is discharged in an orderly manner through the designed channel, thereby improving the system safety level.

[0046] There are multiple discharge chambers 301, which are distributed in a ring at intervals at the end of the transmission rod 302. Correspondingly, there are also multiple receiving chambers 203. This significantly improves the flow capacity without increasing the axial length, which is beneficial for achieving high-flow exhaust function in a limited installation space. Even if some discharge chambers 301 fail due to blockage by impurities or local deformation, the remaining chambers can still work normally, ensuring that the basic exhaust function is not lost.

[0047] like Figures 3-6 As shown, further, it also includes a mounting shell 400 fixedly installed inside the battery box 500. A mounting part 401 is fixedly installed on the outer wall of the mounting shell 400 to achieve a fixed connection with the battery box 500. The mounting shell 400 is provided with a mounting cavity 402 with an opening at one end. The mounting cavity 402 is directly connected to the internal space of the battery box 500 through the opening, so that the smoke gas generated when the battery experiences thermal runaway can quickly enter the mounting cavity 402, ensuring that the smoke monitoring controller 100 can detect changes in smoke concentration at the first time. The mounting cavity 402 is connected to the internal space of the battery box 500. The other end of the transmission rod 302 extends into the mounting cavity 402. The mounting shell 400 has a track groove 403 with a specific path on its shell wall. A sliding part 404 that can reciprocate along its track is provided in the track groove 403. The sliding part 404 is connected to the smoke monitoring controller 100. A transmission unit (such as a connecting rod, push rod or flexible transmission belt) is provided between the sliding part 404 and the transmission rod 302 to convert the reciprocating motion of the sliding part 404 into the rotational motion of the transmission rod 302.

[0048] The track groove 403 physically limits the movement path of the sliding part 404, ensuring that it can only move along the preset track, avoiding deviation, jamming or loss of steps, significantly improving the stability of the transmission process and the repeatability of positioning, and ensuring the reliability of exhaust regulation.

[0049] A connecting part 405 is fixedly provided on the sliding part 404. Specifically, the transmission unit includes a transmission part 303 fixedly provided on the transmission rod 302. The transmission part 303 is provided with a transmission groove 304 extending in a straight line. The connecting part 405 is disposed in the transmission groove 304 and can move along it. With the guidance of the track groove 403 on the sliding part 404, it ensures that each displacement can be accurately converted into a corresponding rotation angle, realizing precise control of the exhaust channel opening and meeting the pressure relief requirements under different smoke concentration levels. The extension direction of the transmission groove 304 is perpendicular to the axis of the transmission rod 302. The movement of the connecting part 405 in the groove will generate an eccentric thrust or pull on the transmission part 303, forming a torque around the axis of the transmission rod 302, thereby driving the transmission rod 302 to rotate around its axis.

[0050] By rationally designing the length of the transmission groove 304 and the stroke of the connecting part 405, the rotation angle range of the transmission rod 302 can be controlled, achieving continuous adjustment between the discharge chamber 301 and the receiving chamber 203 from partial overlap to complete alignment, or opening multiple exhaust channels in stages to achieve dynamic pressure regulation and effectively suppress sudden increases in internal battery pressure. Figure 11 , Figure 12 The diagram shows different states of the transmission rod 302 after it has been rotated relative to the receiving part 201. (It should be noted that, for ease of understanding, the transmission rod 302 is not fully inserted into the receiving part 201.)

[0051] In the specific implementation of this application, the transmission unit 303 consists of two parallel transmission rods 305 with a gap between them. This gap forms an open transmission groove 304 for accommodating the connecting part 405, which can slide freely along the length of this gap. Simultaneously, the parallel transmission rods 305 provide lateral restraint to the connecting part 405, effectively constraining its movement trajectory and preventing deviation, while also preserving sufficient sliding space to ensure sensitive transmission response and reliable operation. The two transmission rods 305 are respectively fixed to the ends of the transmission rod 302, jointly transmitting motion to the transmission rod 302 and driving it to rotate around its axis. Meanwhile, the ends of the transmission rod 302 have internally communicating openings to ensure the continuity of the gas flow path.

[0052] like Figure 6 As shown, specifically, a fixing plate 409 is fixedly installed at the end of the transmission rod 302. Connecting plates 410 are integrally and vertically installed on opposite sides of the fixing plate 409, forming an I-beam-like structure with high bending and torsional stiffness. The fixing plate 409 has through holes that communicate with the hollow cavity of the transmission rod 302, and the transmission rod 305 is fixed to the corresponding connecting plate 410. The gas flow path is concentrated in the central through hole area of ​​the fixing plate 409, while the mechanical connection parts (connecting plates 410) are distributed on the outer periphery, achieving a spatial separation design where the flow channel is centrally located and the connection is external, thus not interfering with the gas flow.

[0053] Based on the above embodiments, it is further defined that the extension direction of the track groove 403 is parallel to the axial direction of the mounting shell 400, and the opening of the mounting shell 400 is located at one end of its axial direction.

[0054] Mechanical vibrations during battery operation, pulse impacts from high-speed airflow during thermal runaway, or turbulent disturbances can all cause external forces to act on the sliding part 404. These forces can lead to radial displacement, wobbling, or even jamming of the sliding part 404 within the mounting cavity 402. These forces can then be transmitted to the transmission rod 302 via the transmission structure, causing uncontrolled micro-rotation or angular deviation, resulting in accidental opening of the exhaust channel or misalignment, severely impacting the safety and reliability of the device. The groove walls on both sides of the track groove 403 provide reliable mechanical constraints on the sliding part 404. When external vibrations or local disturbances attempt to cause the sliding part 404 to displace perpendicular to the track groove 403, the groove walls immediately provide a reaction force, confining it within a predetermined motion plane, preventing wobbling, tilting, or derailment, and ensuring stable motion trajectory.

[0055] In this invention, two track grooves 403 are arranged parallel and symmetrically on the side wall of the mounting housing 400. The two track grooves 403 are connected at both ends by connecting grooves 406, forming a closed rectangular frame groove structure. The sliding part 404 can reciprocate along this frame groove between the two track grooves 403, and its direction can be changed via the connecting grooves 406, thus allowing for cyclic or reciprocating motion over a wider range. Compared to a single track groove 403 that only supports linear reciprocating motion, the rectangular frame groove connects two parallel track grooves 403 via the connecting grooves 406, allowing the sliding part 404 to move along a longer path, effectively extending its travel. This makes it possible for the drive transmission rod 302 to achieve greater angle rotational adjustment, adapting to the full-cycle pressure release requirements of battery thermal runaway from the initial stage to the severe reaction period.

[0056] The four vertices of the rectangular frame groove or the corners of the connecting groove 406 can serve as mechanical stop points to set the limit positions of the sliding part 404 (such as the fully open and fully closed positions), thereby limiting the stroke. The rectangular frame groove as a whole forms a "U"-shaped reinforced structure, which not only provides guidance for the sliding part 404 but also enhances the local rigidity of the side wall of the mounting shell 400, reducing the risk of groove deformation caused by thermal deformation or mechanical stress and ensuring motion accuracy during long-term use.

[0057] like Figure 4 As shown, specifically, the side wall of the mounting shell 400 is provided with an opening, and a slide plate 407 is fixedly installed inside the opening. A rectangular frame groove is formed between the circumferential side wall of the slide plate 407 and the inner cavity wall of the opening. A curved pressure plate 411 (whose structure is adapted to the shape of the mounting shell 400) is fixedly installed on the outer wall of the mounting shell 400. The curved pressure plate 411 is fixed to the slide plate 407 to realize the fixed connection between the slide plate 407 and the mounting shell 400.

[0058] The present invention further includes an inner rotating frame 408 inside the mounting cavity 402. The inner rotating frame 408 can rotate relative to the mounting cavity 402 around its axis via a rotatable connection, and also has the ability to move axially. The drive unit 101 of the smoke monitoring controller 100 is fixedly connected to the inner rotating frame 408, and can directly drive it to perform synchronous rotational movement and axial translation. The connecting part 405 and the sliding part 404 are respectively disposed on the inner and outer sides of the inner rotating frame 408, and are coaxially arranged to form an internal and external linkage structure to ensure the consistency of the movement state of the connecting part 405 and the sliding part 404; at the same time, the outer peripheral wall of the inner rotating frame 408 abuts against the inner cavity wall of the mounting cavity 402, forming circumferential constraint and radial positioning, effectively limiting the radial runout, axial sway, and rotational offset of the inner rotating frame 408 during rotation, thereby ensuring the accuracy and repeatability of its movement trajectory.

[0059] When the inner rotating frame 408 is rotated under force, it will generate a torque reaction force. Insufficient support may cause the frame to twist or tilt. The contact fit between the outer peripheral wall and the inner wall of the mounting cavity 402 is equivalent to increasing the support span of the rotation axis, improving the rigidity and torsional resistance of the overall structure, and making the transmission of driving force more stable.

[0060] like Figures 7-12 As shown, in this invention, the release part 202 includes a release block, which has a release cavity 205 inside. The release block has a release port 206 that communicates with the release cavity 205. The release cavity 205 has a flow-gathering part 207 inside. The flow-gathering part 207 has a connecting hole 208 that communicates with the receiving cavity 203. It has a tapered structure (i.e., funnel-shaped or cone-shaped structure) that gradually narrows as it gets closer to the release port 206, which is used to guide the smoke flow to the release port.

[0061] When a pouch cell battery experiences thermal runaway, a large amount of high-temperature, high-pressure gas is instantly generated inside, with high airflow velocity and turbulent direction. Without a rectification structure, the airflow is prone to forming eddies and backflow during the exhaust process, resulting in a significant decrease in actual exhaust efficiency. However, by setting up a gradually converging flow section 207, the turbulent airflow entering the release chamber 205 is gradually guided and converged into a stable jet flowing axially, effectively reducing turbulence intensity and energy dissipation.

[0062] The present invention further provides multiple release blocks, which are distributed in a circumferential ring along the insertion hole 204 to form a multi-point symmetrical exhaust layout. At the same time, an outer cover 209 is provided, which is fixedly connected to the side wall of the battery box 500 to form a closed cavity, completely enclosing all the release blocks inside. Multiple release ports 206 are correspondingly provided on the outer cover 209 as the final outlet for the gas to be discharged to the outside. A fixing bracket 210 is also provided inside the outer cover 209. The fixing bracket 210 includes multiple pressure rods 212, the number of pressure rods 212 being equal to the number of release blocks. One end of each pressure rod 212 is fixed to form a central support point, and the other end radiates outward. A locking block 213 is fixedly provided at the end of the other end. A snap-fit ​​groove 214 is fixedly provided on the inner wall of the outer cover 209. The snap-fit ​​block 213 is snapped into the snap-fit ​​groove 214, and the fixing bracket 210 can be assembled without additional screws or tools. The release block is detachably equipped with a cover, so that after a thermal runaway event or when cleaning and maintenance are required, the cover can be opened to easily remove the entire fixed bracket 210, facilitating the inspection, cleaning, or replacement of the release block, the flow convergence part 207, and the exhaust passage, thus supporting the maintainability and reusability of the device. Each pressure rod 212 is fixedly equipped with a pressure ring 211, which abuts against the flow convergence part 207 in each release block to axially limit and fix the relative position of the flow convergence part 207 in the release block.

[0063] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0065] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A smoke monitoring and emission device, characterized in that, include: smoke A monitoring controller is installed inside the battery compartment to monitor the concentration of smoke gases inside the battery compartment; A gas exhaust assembly, which is installed on the outer wall of the battery box, includes a receiving part and a releasing part connected in communication, the releasing part being used to exhaust smoke to the outside; A smoke transmission device is installed through the side wall of the battery box to connect the inside of the battery box with the gas exhaust assembly. The smoke transmission device is provided with at least one exhaust chamber, and the receiving part is provided with at least one receiving chamber. The smoke monitoring controller is drivenly connected to the smoke transmission device and is used to control the position of the smoke transmission device relative to the receiving part to change the overlapping area between the exhaust chamber and the receiving chamber.

2. The smoke monitoring and emission device according to claim 1, characterized in that, The receiving part includes a socket, and the receiving cavity is distributed on the inner sidewall of the socket. The smoke transmission device includes a hollow transmission rod, one end of which is inserted into the socket. The discharge cavity is distributed on the sidewall of the end of the transmission rod. The transmission rod can change position relative to the receiving part.

3. The smoke monitoring and emission device according to claim 2, characterized in that, The transmission rod is rotatably connected to the battery box and can rotate about its axis relative to the receiving part.

4. The smoke monitoring and emission device according to claim 3, characterized in that, It also includes a mounting shell fixedly installed inside the battery box. The mounting shell has a mounting cavity with an opening at one end, which is connected to the internal space of the battery box. The other end of the transmission rod extends into the mounting cavity. The shell wall of the mounting shell is provided with a track groove, and a sliding part that can reciprocate along the track groove is provided in the track groove. The sliding part is drivenly connected to the smoke monitoring controller, and a transmission unit is provided between the sliding part and the transmission rod.

5. A smoke monitoring and emission device according to claim 4, characterized in that, A connecting part is fixedly provided on the sliding part. The transmission unit includes a transmission part fixedly provided on the transmission rod. The transmission part is provided with a transmission groove extending in a straight line. The connecting part is provided in the transmission groove and can move along it. The extension direction of the transmission groove is perpendicular to the axis of the transmission rod. As the connecting part moves in the transmission groove, it drives the transmission rod to rotate relative to the receiving part.

6. A smoke monitoring and emission device according to claim 4, characterized in that, The extension direction of the track groove is parallel to the axial direction of the mounting shell, and the opening of the mounting shell is located at one of its axial ends.

7. A smoke monitoring and emission device according to claim 6, characterized in that, The number of track slots is two, the two track slots are arranged in parallel, and the two track slots are connected by two connecting slots to form a rectangular frame slot, and the sliding part can move within the rectangular frame slot.

8. A smoke monitoring and emission device according to claim 4, characterized in that, An inner rotating frame is rotatably arranged inside the mounting cavity. The smoke controller includes a driving unit, which is fixed to the inner rotating frame and is used to drive the inner rotating module to rotate around its axis and move axially. The connecting part and the sliding part are respectively arranged on the inner and outer sides of the inner rotating module.

9. A smoke monitoring and emission device according to claim 1, characterized in that, The release part includes a release block with a release cavity inside, and a release port connected to the release cavity on the release block; a flow-gathering part is provided inside the release cavity, and a connecting hole connected to the receiving cavity is provided on the flow-gathering part. The flow cross section of the flow-gathering part gradually narrows towards the release port to guide the smoke flow to the release port.

10. A battery pack, characterized in that, Includes the smoke monitoring and release device as described in any one of claims 1-9 above.

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